Breast pump, method for determining and method for controlling brimfulness state of breast pump, and related devices

Abstract

Provided are a breast pump, a method for determining and a method for controlling the brimfulness state of a breast pump, and related devices. The breast pump comprises: a milk storage container configured for storing milk and a differential capacitive sensor assembly configured for detecting a state parameter of the milk storage container. The milk storage container comprises a milk storage container body, and the milk storage container body comprises an inner side surface in contact with milk and an outer side surface not in contact with milk. The differential capacitive sensor assembly comprises a detection electrode assembly, and the detection electrode assembly is arranged on the outer side surface or close to the outer side surface. The detection of the state parameter of the milk storage container by the differential capacitive sensor assembly is not susceptible to external interference and can thus ensure the detection accuracy of the state parameter of the milk storage container. The non-contact measurement in the milk storage container can ensure the cleanliness of the milk.

Description

Breast pump, milk full state judgment method, control method and related device of breast pump TECHNICAL FIELD

[0001] The present application relates to the technical field of maternal and child products, in particular to a breast pump, a milk full state judgment method, a control method and related device of the breast pump. BACKGROUND

[0002] In the prior art, the detection technology of state parameters such as milk volume, milk fullness, and empty milk of the breast pump has always been an industry problem. At present, the mainstream detection scheme mainly adopts optical sensing and capacitive sensing technologies, but there are significant limitations in actual application, which are specifically as follows:

[0003] Firstly, the existing optical and capacitive sensing schemes are easily interfered by milk wall hanging, liquid surface tilting, and shaking, resulting in low detection accuracy.

[0004] Secondly, the current mainstream capacitive sensor is generally used only for detecting milk volume or liquid level in the breast pump, and cannot comprehensively detect the state of the milk storage container. However, many states of the milk storage container are particularly important for intelligent control of the breast pump.

[0005] Thirdly, the current capacitive sensor needs to be arranged on the inner side of the milk storage container and directly contacts the milk, which may contaminate the milk. In extreme cases, the milk may also seep into the capacitive sensor, causing damage to the sensor.

[0006] To solve any of the above technical problems, the present application is proposed. SUMMARY

[0007] The present application provides a breast pump, a milk full state judgment method, a control method and related device of the breast pump, which aims to solve any of the above technical problems.

[0008] In a first aspect, the present application provides a breast pump, which comprises a milk storage container for storing milk and a differential capacitive sensor assembly for detecting state parameters of the milk storage container. The milk storage container comprises a milk storage container shell, which comprises an inner side surface in contact with the milk and an outer side surface not in contact with the milk. The differential capacitive sensor assembly comprises a detection electrode assembly arranged on the outer side surface or the outer side surface close to the outer side surface.

[0009] In the above technical solution, on the one hand, the differential capacitive sensor assembly can quantitatively detect state parameters such as milk or liquid level, and the detection result will not be substantially affected when the milk wall hanging phenomenon occurs, and the anti-interference ability is strong. On the other hand, the differential capacitive sensor assembly can be used to detect the critical state from emptying the milk storage container to discharging the breast milk, thereby optimizing the use experience of the breast pump. On the other hand, the milk storage container is measured non-contactly, ensuring the cleanliness of the milk.

[0010] In a possible implementation manner of the first aspect, the state parameter of the milk storage container includes at least one of a milk amount in the milk storage container, a liquid level in the milk storage container, an empty milk state, a milk state, a full milk state, and a unit height milk detection value.

[0011] In the implementation manner, the differential capacitive sensor assembly can be used to detect a plurality of different state parameters of the milk storage container, so as to comprehensively detect the milk storage container.

[0012] In a possible implementation manner of the first aspect, the detection electrode assembly is detachably fixed to the outer side surface or the outer side surface close to the outer side surface.

[0013] In the implementation manner, the user can replace the detection electrode assembly at any time when the detection electrode assembly is damaged or inaccurate detection occurs.

[0014] In a possible implementation manner of the first aspect, the differential capacitive sensor assembly further includes a control circuit; the detection electrode assembly includes at least one set of oppositely arranged parallel capacitors, and the parallel capacitor includes a first electrode and a second electrode; and the control circuit is used at least for charging the detection electrode assembly and detecting a capacitance value of the detection electrode assembly.

[0015] In a possible implementation manner of the first aspect, the first electrode and the second electrode are parallel plate electrodes, and the first electrode and the second electrode extend in a direction in which the milk liquid level rises.

[0016] In a possible implementation manner of the first aspect, the breast pump further includes a processing unit, the control circuit includes a conversion unit, and the conversion unit includes an excitation module, a sampling module and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, charges on the detection electrode assembly are transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal; and the processing unit is used for calculating a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0017] In a possible implementation manner of the first aspect, a distance between the first electrode and the second electrode is greater than a distance between the differential capacitive sensor assembly and the inner side surface of the milk storage container shell.

[0018] In the implementation manner, the distance between the first electrode and the second electrode is greater than the distance between the differential capacitive sensor assembly and the inner side surface of the milk storage container shell, so that the electric field lines between the two electrodes pass through the inner side surface of the milk storage container, and the change of the liquid level is detected.

[0019] In a possible implementation manner of the first aspect, the breast pump further includes a host, and the differential capacitive sensor assembly is arranged in the host.

[0020] In the implementation mode, the host is fixedly installed on the milk storage container when the breast pump is used, and the differential capacitance sensor assembly is arranged on the host close to the outer side of the milk storage container, so that the non-contact measurement of the state parameters of the milk storage container is realized.

[0021] In a possible implementation mode of the first aspect, the host comprises a host shell, the detection electrode assembly is arranged on the host shell, and the host shell is installed on or at least partially in contact with the outer side of the milk storage container shell, and the detection electrode assembly is close to or in contact with the outer side of the milk storage container shell.

[0022] In a possible implementation mode of the first aspect, the host shell comprises an inner side close to the interior of the host and an outer side away from the interior of the host, and the detection electrode assembly is arranged on the inner side of the host shell.

[0023] In the implementation mode, the arrangement of the detection electrode assembly on the inner side of the host shell can prevent the detection electrode assembly from being scratched or bumped, and can facilitate the electrical connection between the detection electrode assembly and the control circuit.

[0024] In a possible implementation mode of the first aspect, the host further comprises a component arrangement layer and a sensor arrangement layer, the sensor arrangement layer is arranged between the component arrangement layer and the host shell, and the parallel capacitor group is arranged on the sensor arrangement layer.

[0025] In a possible implementation mode of the first aspect, the sensor arrangement layer has an electrical shielding effect, and the parallel capacitor group is arranged on the side of the sensor arrangement layer close to the host shell.

[0026] In the implementation mode, the sensor arrangement layer has an electrical shielding effect, which can reduce the interference of the electronic components in the host on the detection electrode assembly and improve the detection accuracy.

[0027] In a possible implementation mode of the first aspect, the host comprises a main body extending in the rising direction of the milk liquid surface and a base located below the bottom wall of the milk storage container, the milk storage container comprises a side wall extending in the rising direction of the milk liquid surface and a bottom wall connected to the side wall, the main body contacts or is close to the side wall, and the base contacts or is close to the bottom wall; the milk storage container is installed above the base, and the detection electrode assembly at least comprises a parallel capacitor group arranged on the base.

[0028] In a possible implementation mode of the first aspect, the host comprises a main body extending in the rising direction of the milk liquid surface and a base located above the top wall of the milk storage container, the milk storage container comprises a side wall extending in the rising direction of the milk liquid surface and a top wall connected to the side wall, the main body contacts or is close to the side wall, and the base contacts or is close to the top wall; the milk storage container is installed below the base, and the detection electrode assembly at least comprises a parallel capacitor group arranged on the base.

[0029] In a possible implementation manner of the first aspect, the host further includes a bottom wall, the milk storage container further includes a top wall, and the bottom wall of the host is fixed to the top wall of the milk storage container; the detection electrode assembly at least includes a set of parallel capacitors arranged on the bottom wall of the host.

[0030] In a possible implementation manner of the first aspect, the detection electrode assembly is fixed to the outer side of the milk storage container shell and is electrically connected to the control circuit arranged on the host.

[0031] In a possible implementation manner of the first aspect, the detection electrode assembly includes a plurality of sets of parallel capacitors arranged oppositely.

[0032] In the implementation manner, the detection electrode assembly includes a plurality of sets of parallel capacitors arranged oppositely, so as to detect a plurality of state parameters of the milk storage container.

[0033] In a possible implementation manner of the first aspect, the detection electrode assembly includes a first set of parallel capacitors and a second set of parallel capacitors, the first set of parallel capacitors is used to measure a first milk amount range or a first liquid level range, and the second set of parallel capacitors is used to measure a second milk amount range or a second liquid level range.

[0034] In the implementation manner, two sets of parallel capacitors are used to detect the change of the liquid level or the milk amount, so as to improve the detection accuracy.

[0035] In a possible implementation manner of the first aspect, the differential capacitive sensor assembly at least includes a full-milk detection set of parallel capacitors used to measure a full-milk state of the milk storage container; the full-milk detection set of parallel capacitors is arranged at a position close to the top of the milk storage container.

[0036] In the implementation manner, the full-milk detection set of parallel capacitors is used to detect the full-milk state of the milk storage container, so as to prevent the milk storage container from overflowing.

[0037] In a possible implementation manner of the first aspect, the differential capacitive sensor assembly at least includes an empty-milk detection set of parallel capacitors used to measure an empty-milk state of the milk storage container; the empty-milk detection set of parallel capacitors is arranged at a position close to the bottom of the milk storage container.

[0038] In the implementation manner, the empty-milk detection set of parallel capacitors is used to detect the empty-milk state of the milk storage container, so as to accurately measure the critical state of the mother's milk discharge, thereby facilitating the intelligent milk pumping of the breast pump.

[0039] In a possible implementation manner of the first aspect, the differential capacitive sensor assembly at least includes a unit height detection set of parallel capacitors used to detect a unit height milk detection value; the unit height detection set of parallel capacitors is arranged at a position of the bottom of the milk storage container.

[0040] In the implementation mode, because the dielectric constant of milk of different mothers is different, human touch interference, process errors of the breast pump in the factory state such as manufacturing and assembly, and the like affect the mapping relationship between the detection value of the differential capacitive sensor assembly and the liquid level or milk volume, which is not fixed. Therefore, in the implementation mode, the influence of the above interference on the liquid level or milk volume detection is eliminated or reduced by detecting the milk detection value of the unit height, and the liquid level or milk volume detection precision is improved.

[0041] In a possible implementation mode of the first aspect, the plurality of parallel capacitive groups are at least two groups of the milk volume detection parallel capacitive group, the empty milk detection parallel capacitive group, the empty milk detection parallel capacitive group, and the unit height detection parallel capacitive group.

[0042] In a possible implementation mode of the first aspect, the breast pump further includes a breast shield including a flange for fitting the breast; a milk storage container for receiving and storing the breast milk collected by the breast shield, the milk storage container being in communication with the breast shield; and a host including a negative pressure mechanism for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0043] In the second aspect, the embodiments of the present application further provide a differential capacitive sensor assembly capable of being detachably mounted on the milk storage container of the breast pump and detecting the state parameters of the milk storage container.

[0044] In the above embodiments, in the case that the differential capacitive sensor assembly is degraded in precision, damaged, or contaminated, the user can detach the differential capacitive sensor assembly for replacement or cleaning, so that the breast pump is easy to maintain. In addition, the differential capacitive sensor assembly detects the state parameters of the milk storage container, has good anti-interference effect on external interference, and has high detection precision.

[0045] In a possible implementation mode of the second aspect, the differential capacitive sensor assembly includes a communication port for inserting a connection line to communicate with the breast pump.

[0046] In the implementation mode, the connection through the connection line can power the differential capacitive sensor assembly, and the differential capacitive sensor assembly can not be provided with a power supply device, so that the differential capacitive sensor assembly is easy to implement a lightweight design.

[0047] In a possible implementation mode of the second aspect, the differential capacitive sensor assembly includes a wireless communication module for wireless communication with the breast pump.

[0048] In the implementation mode, wireless communication can simplify the wiring design in the breast pump and is easy for the user to install.

[0049] In a possible implementation manner of the second aspect, the differential capacitance sensor assembly comprises a detection electrode assembly and a control circuit; the detection electrode assembly at least comprises a set of oppositely arranged parallel capacitance groups, and each parallel capacitance group comprises a first electrode and a second electrode; and the control circuit is used at least for charging the detection electrode assembly and detecting a capacitance value of the detection electrode assembly.

[0050] In a third aspect, the embodiments of the present application further provide another breast pump, which comprises a milk storage container and three sets of differential capacitance sensor assemblies.

[0051] In the above technical solution, on the one hand, the differential capacitance sensor assembly can quantitatively detect state parameters such as milk or liquid level, and will not substantially affect the detection result when the milk wall-hanging phenomenon occurs, and has strong anti-interference capability. On the other hand, the differential capacitance sensor assembly can be used to detect the critical state of the empty milk storage container to the milk discharge of the mother, so as to optimize the use experience of the breast pump. On the other hand, the milk storage container is detected by the three sets of differential capacitance sensors, which can comprehensively and in detail determine the state of the milk storage container, and is beneficial to improve the intelligent degree of the breast pump.

[0052] In a possible implementation manner of the third aspect, in the rising direction of the milk liquid level in the milk storage container, the height of the bottom of the third detection electrode assembly is lower than or equal to the height of the top of the first detection electrode assembly, and the height of the top of the third detection electrode assembly is higher than or equal to the height of the bottom of the second detection electrode assembly.

[0053] In a possible implementation manner of the third aspect, the milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side surface in contact with the milk liquid and an outer side surface not in contact with the milk liquid; the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the outer side surface or the outer side close to the outer side surface.

[0054] In the above implementation manner, non-contact measurement can ensure the cleanliness of the milk liquid.

[0055] In a possible implementation manner of the third aspect, the first set of differential capacitance sensor assemblies are used to detect the full milk state of the milk storage container; the second set of differential capacitance sensor assemblies are used to detect at least one of the empty milk state of the milk storage container and the unit height milk liquid detection value; and the third set of differential capacitance sensor assemblies are used to detect the milk amount in the milk storage container or the liquid level in the milk storage container.

[0056] In the above implementation manner, the empty milk state is detected, and the critical state of the mother with milk discharge can be accurately measured, so as to facilitate the intelligent breast pumping of the breast pump.

[0057] In the above implementation, the milk quantity in the milk storage container and the liquid level in the milk storage container are detected, so that the user can know whether the stored milk quantity is sufficient.

[0058] In the above implementation, the milk full state is detected, so that the milk suction can be stopped in time to prevent the milk storage container from overflowing.

[0059] In the above implementation, the unit height milk detection value is detected, so that the influence of the different dielectric constants of milk of different mothers, human touch interference, and process errors of the breast pump in the factory state due to manufacturing and assembly, and the influence on the liquid level or milk quantity detection are reduced or eliminated, and the liquid level or milk quantity detection precision is improved.

[0060] In a possible implementation of the third aspect, the differential capacitive sensor assembly includes a detection electrode assembly and a control circuit; the detection electrode assembly includes at least a set of oppositely arranged parallel capacitors, and each parallel capacitor includes a first electrode and a second electrode; and the control circuit is configured to at least charge the detection electrode assembly and detect a capacitance value of the detection electrode assembly.

[0061] In a possible implementation of the third aspect, the first electrode and the second electrode are parallel plate electrodes.

[0062] In a possible implementation of the third aspect, the breast pump further includes a processing unit, the control circuit includes a conversion unit, and the conversion unit includes an excitation module, a sampling module, and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal; and the processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0063] In a possible implementation of the third aspect, the breast pump further includes a host, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the host.

[0064] In a possible implementation of the third aspect, the host includes a host shell, the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the host shell, the host shell is mounted on an outer side surface of the milk storage container shell or at least partially contacts the outer side surface of the milk storage container shell, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are close to or contact the outer side surface of the milk storage container shell.

[0065] In a possible implementation manner of the third aspect, the host further includes a component setting layer and a sensor setting layer, the sensor setting layer is arranged between the component setting layer and the host shell; the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the sensor setting layer.

[0066] In a possible implementation manner of the third aspect, the breast pump further includes a breast shield and a host, the breast shield includes a flange for fitting a breast; a milk storage container is used for receiving and storing breast milk collected by the breast shield, the milk storage container is in communication with the breast shield; the host includes a negative pressure mechanism, the negative pressure mechanism is used for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0067] In a possible implementation manner of the fourth aspect, the breast pump further includes a milk storage container and three groups of differential capacitive sensor assemblies; a first group of differential capacitive sensor assemblies includes a first detection electrode assembly, in a rising direction of a milk liquid level in the milk storage container, the first detection electrode assembly is arranged in a top region; a second group of differential capacitive sensor assemblies includes a second detection electrode assembly, in the rising direction of the milk liquid level in the milk storage container, the second detection electrode assembly is arranged in a bottom region; a third group of differential capacitive sensor assemblies includes a third detection electrode assembly, in the rising direction of the milk liquid level in the milk storage container, a height of a top of the third detection electrode assembly is lower than a height of the first detection electrode assembly, and a height of a bottom of the third detection electrode assembly is higher than a height of the second detection electrode assembly.

[0068] In the above technical solution, on one hand, the differential capacitive sensor assembly can quantitatively detect state parameters such as milk liquid or liquid level, and will not substantially affect the detection result when the milk liquid wall-hanging phenomenon occurs, and has strong anti-interference capability. On the other hand, the differential capacitive sensor assembly can be used to detect the critical state of the empty milk storage container to the milk discharge of the milk storage container, thereby optimizing the use experience of the breast pump. On the other hand, the three groups of differential capacitive sensors are used to detect the milk storage container, which can comprehensively and in detail determine the state of the milk storage container, and is beneficial to improve the intelligent degree of the breast pump.

[0069] In a possible implementation manner of the fourth aspect, in the rising direction of the milk liquid level, the third detection electrode assembly extends from the bottom region to the top region.

[0070] In a possible implementation manner, the milk storage container includes a milk storage container shell, the milk storage container shell includes an inner side surface in contact with the milk liquid and an outer side surface not in contact with the milk liquid; the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the outer side surface or the outer side close to the outer side surface.

[0071] In the implementation manner, the milk can be ensured clean through the non-contact measurement.

[0072] In a possible implementation manner of the fourth aspect, the first group of differential capacitive sensor assemblies are configured to detect a full milk state of the milk storage container; the second group of differential capacitive sensor assemblies are configured to detect at least one of an empty milk state and a unit height milk detection value of the milk storage container; and the third group of differential capacitive sensor assemblies are configured to detect a milk amount in the milk storage container or a liquid level in the milk storage container.

[0073] In the implementation manner, the milk amount in the milk storage container and the liquid level in the milk storage container are detected, so that the user can know whether the stored milk amount is sufficient. The measurement precision of the milk amount or the liquid level can be improved through two differential capacitive sensor assemblies.

[0074] In the implementation manner, the full milk state is detected, so that the milk suction can be stopped in time to prevent the milk storage container from overflowing.

[0075] In a possible implementation manner of the fourth aspect, the differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; the detection electrode assembly comprises at least one group of oppositely arranged parallel capacitors, and each parallel capacitor comprises a first electrode and a second electrode; and the control circuit is configured to at least charge the detection electrode assembly and detect a capacitance value of the detection electrode assembly.

[0076] In a possible implementation manner of the fourth aspect, the first electrode and the second electrode are parallel plate electrodes.

[0077] In a possible implementation manner of the fourth aspect, the breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal; and the processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0078] In a possible implementation manner of the fourth aspect, the breast pump further comprises a host, and the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged in the host.

[0079] In a possible implementation manner of the fourth aspect, the host includes a host shell, the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the host shell, and the host shell is mounted on or at least partially in contact with the outer side surface of the milk storage container shell, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are close to or in contact with the outer side surface of the milk storage container shell.

[0080] In a possible implementation manner of the fourth aspect, the host further includes a component arrangement layer and a sensor arrangement layer, the sensor arrangement layer is arranged between the component arrangement layer and the host shell; and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the sensor arrangement layer.

[0081] In a possible implementation manner of the fourth aspect, the breast pump further includes a breast shield and a host, the breast shield includes a flange for fitting a breast; the milk storage container is used for receiving and storing the breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield; and the host includes a negative pressure mechanism, the negative pressure mechanism is used for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0082] In the fifth aspect, the embodiments of the present application further provide another breast pump, which includes a milk storage container and three groups of differential capacitive sensor assemblies; the first group of differential capacitive sensor assemblies includes a first detection electrode assembly, the first detection electrode assembly is arranged in a top region in a rising direction of a milk liquid level in the milk storage container; the second group of differential capacitive sensor assemblies includes a second detection electrode assembly, the second detection electrode assembly extends from a bottom region to a middle region in the rising direction of the milk liquid level in the milk storage container; and the third group of differential capacitive sensor assemblies includes a third detection electrode assembly, the third detection electrode assembly extends from the middle region to the top region in the rising direction of the milk liquid level in the milk storage container.

[0083] In the above technical solution, on one hand, the differential capacitive sensor assembly can quantitatively detect state parameters such as milk liquid or liquid level, and will not substantially affect the detection result when the milk liquid wall-hanging phenomenon occurs, and has strong anti-interference capability. On the other hand, the differential capacitive sensor assembly can be used to detect the critical state of the empty milk storage container to the milk discharge, so as to optimize the use experience of the breast pump. On the other hand, the three groups of differential capacitive sensors are used to detect the milk storage container, which can comprehensively and in detail determine the state of the milk storage container, and is beneficial to improve the intelligent degree of the breast pump.

[0084] In a possible implementation manner of the fifth aspect, the height of the bottom of the third detection electrode assembly is higher than the height of the top of the second detection electrode assembly in the direction in which the milk liquid level rises.

[0085] In a possible implementation manner of the fifth aspect, the milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side that contacts the milk liquid and an outer side that does not contact the milk liquid; the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the outer side or the outer side close to the outer side.

[0086] In the implementation manners described above, the non-contact measurement can ensure the cleanliness of the milk liquid.

[0087] In a possible implementation manner of the fifth aspect, the first group of differential capacitive sensor assemblies are used to detect the milk full state of the milk storage container; the second group of differential capacitive sensor assemblies are used to detect the milk amount in the first milk amount range or the liquid level in the first liquid level height range of the milk storage container; and the third group of differential capacitive sensor assemblies are used to detect the milk amount in the second milk amount range or the liquid level in the second liquid level height range of the milk storage container.

[0088] In the implementation manners described above, the detection of the milk amount in the milk storage container and the liquid level in the milk storage container can enable the user to know whether the stored milk amount is sufficient. The measurement accuracy of the milk amount or the liquid level can be improved by using two differential capacitive sensor assemblies.

[0089] In the implementation manners described above, the detection of the milk full state can stop the milk pumping in time and prevent the milk overflow of the milk storage container.

[0090] In a possible implementation manner of the fifth aspect, the differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; the detection electrode assembly comprises at least one set of oppositely arranged parallel capacitors, and each parallel capacitor comprises a first electrode and a second electrode; and the control circuit is used to at least charge the detection electrode assembly and detect the capacitance value of the detection electrode assembly.

[0091] In a possible implementation manner of the fifth aspect, the first electrode and the second electrode are parallel plate electrodes.

[0092] In a possible implementation manner of the fifth aspect, the breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module, and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal; and the processing unit is used to calculate the state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0093] In a possible implementation manner of the fifth aspect, the breast pump further includes a host, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the host.

[0094] In a possible implementation manner of the fifth aspect, the host includes a host shell, the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the host shell, the host shell is mounted on or at least partially in contact with the outer side of the milk storage container shell, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are close to or in contact with the outer side of the milk storage container shell.

[0095] In a possible implementation manner of the fifth aspect, the host further includes a component arrangement layer and a sensor arrangement layer, the sensor arrangement layer is arranged between the component arrangement layer and the host shell, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the sensor arrangement layer.

[0096] In a possible implementation manner of the fifth aspect, the breast pump further includes a breast shield and a host, the breast shield includes a flange for fitting a breast, a milk storage container is configured to receive and store breast milk collected by the breast shield, the milk storage container is in communication with the breast shield, and the host includes a negative pressure mechanism configured to directly or indirectly apply negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0097] In a sixth aspect, the embodiments of the present application further provide another breast pump, which includes a milk storage container and a capacitive sensor assembly; the milk storage container is configured to store sucked milk; the capacitive sensor assembly is configured to detect a state parameter of the milk storage container; and the capacitive sensor assembly is arranged on the outer side of the milk storage container which does not contact the milk.

[0098] In the above technical solution, the capacitive sensor assembly is arranged on the outer side of the milk storage container which does not contact the milk, thereby realizing non-contact measurement when measuring the state parameter of the milk storage container.

[0099] In a possible implementation manner of the sixth aspect, the capacitive sensor assembly is configured to detect an empty milk state of the milk storage container and a unit height milk detection value.

[0100] In the above implementation manner, the capacitive sensor assembly is configured to detect two state parameters of the milk storage container at the same time, thereby saving cost and required arrangement space. Detecting the empty milk state is beneficial to knowing the milk ejection state of a mother, thereby switching to a breast pumping mode. Detecting the unit height milk detection value can eliminate or reduce interference caused by differences in dielectric constants of milk of the mother, proximity or touch of a human body, and the like, thereby improving detection precision of milk volume or liquid surface height.

[0101] In a possible implementation manner of the sixth aspect, the capacitive sensor assembly is a differential capacitive sensor assembly.

[0102] In the above implementation manner, on one hand, the differential capacitive sensor assembly does not substantially affect the detection result when the milk wall-hanging phenomenon occurs, and has strong anti-interference capability. On the other hand, the differential capacitive sensor assembly can be used to detect the critical state of the milk storage container from an empty cup to milk discharge, thereby optimizing the use experience of the breast pump.

[0103] In a possible implementation manner of the sixth aspect, the differential capacitive sensor assembly comprises a detection electrode assembly, and the detection electrode assembly comprises a parallel capacitor group; the parallel capacitor group comprises a first electrode and a second electrode, and the first electrode and the second electrode are parallel plate electrodes.

[0104] In a possible implementation manner of the sixth aspect, the differential capacitive sensor assembly further comprises a control circuit; and the control circuit is configured to at least charge the detection electrode assembly and detect a capacitance value of the detection electrode assembly.

[0105] In a possible implementation manner of the sixth aspect, the capacitive sensor assembly is detachably fixed to a position at the bottom of the milk storage container.

[0106] In a possible implementation manner of the sixth aspect, the breast pump comprises a host, and the host comprises a host shell; and in a direction in which the milk level rises, the capacitive sensor assembly is detachably fixed to a position close to the bottom of the milk storage container on the host shell.

[0107] In a possible implementation manner of the sixth aspect, the breast pump comprises a host, and the host comprises a mounting hole; the breast pump further comprises a breast shield configured to suck out milk; the breast shield is arranged in the host through the mounting hole and is in liquid communication with the milk storage container; and the capacitive sensor assembly is arranged at a position close to the mounting hole on the host.

[0108] In a possible implementation manner of the sixth aspect, the breast pump comprises a host, and the host comprises a main body extending in a direction in which the milk level rises and a base located below a bottom wall of the milk storage container; the milk storage container comprises a side wall extending in the direction in which the milk level rises and a bottom wall connected to the side wall; the main body contacts or is close to the side wall, and the base contacts or is close to the bottom wall; the milk storage container is arranged above the base, and the capacitive sensor assembly comprises at least one capacitive unit arranged on the base.

[0109] In a possible implementation manner of the sixth aspect, the milk sucked by the breast pump flows into the milk storage container from a milk inlet position of the milk inlet, and the empty milk detection sensor assembly is correspondingly arranged at the milk inlet position.

[0110] In the above implementation manner, detecting whether the milk inlet position of the milk inlet flows through the milk, has the effect of improving the detection accuracy of the empty milk state.

[0111] In a possible implementation manner of the sixth aspect, the capacitive sensor assembly is at least partially arranged below the milk inlet in a direction in which the milk level rises.

[0112] In the above implementation manner, because of the action of gravity, the milk will drip or flow into the milk storage container from the milk inlet position of the milk inlet, and therefore the capacitive sensor assembly is at least partially arranged below the milk inlet to detect the empty milk state at the first time.

[0113] In a possible implementation manner of the sixth aspect, the breast pump further comprises a capacitive sensor assembly for detecting the milk volume or the liquid level.

[0114] In a possible implementation manner of the sixth aspect, the breast pump further comprises a capacitive sensor assembly for detecting the full milk state.

[0115] In a possible implementation manner of the sixth aspect, the breast pump further comprises a capacitive sensor assembly for detecting the milk volume or the liquid level and a capacitive sensor assembly for detecting the full milk state.

[0116] In a possible implementation manner of the sixth aspect, the capacitive sensor assembly can be detachably mounted on the milk storage container of the breast pump and detect the state parameters of the milk storage container.

[0117] In the above implementation manner, in the case of accuracy reduction, damage or contamination of the capacitive sensor assembly, the user can detach the capacitive sensor assembly for replacement or cleaning, so that the breast pump is easy to maintain.

[0118] In a possible implementation manner of the sixth aspect, the breast pump further comprises a breast shield and a main machine, the breast shield comprises a flange for fitting the breast, the milk storage container is used for receiving and storing the breast milk collected by the breast shield, the milk storage container is in communication with the breast shield, and the main machine comprises a negative pressure mechanism for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0119] In a seventh aspect, the embodiments of the present application further provide another breast pump, comprising: a milk storage container and a plurality of capacitive sensor assemblies; the milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side in contact with milk and an outer side not in contact with milk; each capacitive sensor assembly comprises a detection electrode assembly, and each detection electrode assembly is arranged on or close to the outer side of the outer side; the plurality of capacitive sensor assemblies detect different state parameters of the milk storage container.

[0120] In the above scheme, the plurality of capacitive sensor assemblies can detect a plurality of different state parameters of the milk storage container, which can comprehensively and in detail determine the state of the milk storage container, and is conducive to improving the intelligent degree of the breast pump.

[0121] In a possible implementation manner of the seventh aspect, the capacitive sensor assembly is a differential capacitive sensor assembly.

[0122] In the above implementation manner, on the one hand, the differential capacitive sensor assembly can quantitatively detect state parameters such as milk or liquid level, and will not substantially affect the detection result when milk wall hanging or other phenomena occurs, and has strong anti-interference capability. On the other hand, the differential capacitive sensor assembly can be used to detect the critical state of the empty cup of the milk storage container to the milk discharge of the milk storage container, thereby optimizing the use experience of the breast pump.

[0123] In a possible implementation manner of the seventh aspect, the differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; the detection electrode assembly comprises at least one set of oppositely arranged parallel capacitors, the parallel capacitors comprising a first electrode and a second electrode; and the control circuit is configured to at least charge the detection electrode assembly and detect the capacitance value of the detection electrode assembly.

[0124] In a possible implementation manner of the seventh aspect, the first electrode and the second electrode are parallel plate electrodes.

[0125] In a possible implementation manner of the seventh aspect, the breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal; and the processing unit is configured to calculate the state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0126] In a possible implementation manner of the seventh aspect, the state parameter of the milk storage container includes at least one of a milk amount in the milk storage container, a liquid level in the milk storage container, an empty milk state, a milk state, a full milk state, and a unit height milk detection value.

[0127] In the implementation manners, the empty milk state is detected, so that the critical state of the mother with milk discharge can be accurately measured, thereby facilitating intelligent milk pumping of the breast pump.

[0128] In the implementation manners, the milk amount in the milk storage container and the liquid level in the milk storage container are detected, so that the user can know whether the stored milk amount is sufficient.

[0129] In the implementation manners, the full milk state is detected, so that milk pumping can be stopped in time to prevent the milk storage container from overflowing.

[0130] In the implementation manners, the unit height milk detection value is detected, so that the influence of different dielectric constants of milk of different mothers, human touch interference, and process errors of the breast pump in the factory state due to manufacturing and assembly can be reduced or eliminated, the influence on liquid level or milk amount detection is reduced or eliminated, and the liquid level or milk amount detection accuracy is improved.

[0131] In a possible implementation manner of the seventh aspect, the breast pump includes a group of capacitive sensor assemblies for detecting the milk amount in the milk storage container or the liquid level in the milk storage container, and a group of capacitive sensor assemblies for detecting the full milk state.

[0132] In a possible implementation manner of the seventh aspect, the breast pump includes a group of capacitive sensor assemblies for detecting the milk amount in the milk storage container or the liquid level in the milk storage container, and a group of capacitive sensor assemblies for detecting the unit height milk detection value.

[0133] In a possible implementation manner of the seventh aspect, the breast pump includes a group of capacitive sensor assemblies for detecting the milk amount in the milk storage container or the liquid level in the milk storage container, and a group of capacitive sensor assemblies for detecting the empty milk state.

[0134] In a possible implementation manner of the seventh aspect, the breast pump includes a group of capacitive sensor assemblies for detecting the full milk state, and a group of capacitive sensor assemblies for detecting the empty milk state.

[0135] In a possible implementation manner of the seventh aspect, the breast pump includes a group of capacitive sensor assemblies for detecting the full milk state, and a group of capacitive sensor assemblies for detecting the unit height milk detection value.

[0136] In a possible implementation manner of the seventh aspect, the breast pump comprises a plurality of groups of capacitive sensor assemblies for detecting milk amounts in different ranges of the storage container or liquid levels in different ranges of the storage container.

[0137] In a possible implementation manner of the seventh aspect, the breast pump further comprises a breast shield and a main machine, the breast shield comprises a flange for fitting a breast, the storage container is configured to receive and store the breast milk collected by the breast shield, the storage container is in communication with the breast shield, and the main machine comprises a negative pressure mechanism configured to directly or indirectly apply negative pressure to the breast shield to suck the breast milk into the storage container.

[0138] In the eighth aspect, the embodiments of the present application further provide another breast pump, which comprises a breast shield, a storage container, a main machine and a capacitive sensor assembly. The breast shield comprises a flange for fitting a breast and a nipple accommodating portion for accommodating a nipple. The storage container is configured to receive and store breast milk collected by the breast shield, and the storage container is in communication with the breast shield. The main machine comprises a negative pressure mechanism configured to directly or indirectly apply negative pressure to the breast shield to suck the breast milk into the storage container. The capacitive sensor assembly is configured to detect whether the breast milk in the storage container reaches a corresponding position of a preset full milk value.

[0139] In the above scheme, by configuring the capacitive sensor assembly to be specially configured to detect whether the breast milk in the storage container reaches the corresponding position of the preset full milk value, the detection is not easily disturbed by the breast milk wall-hanging and the like, and the full milk detection accuracy is improved.

[0140] In a possible implementation manner of the eighth aspect, the capacitive sensor assembly is a differential capacitive sensor assembly.

[0141] In the above implementation manner, when the differential capacitive sensor assembly is subjected to the breast milk wall-hanging and the like, the detection result is not substantially affected, and the anti-interference capability is strong.

[0142] In a possible implementation manner of the eighth aspect, the differential capacitive sensor assembly comprises a parallel capacitor group and a control circuit. The parallel capacitor group comprises oppositely arranged first and second electrodes. The control circuit is configured to charge the parallel capacitor group and detect a capacitance value of the parallel capacitor group.

[0143] In a possible implementation manner of the eighth aspect, in a rising direction of the breast milk in the storage container, a height of a bottom of the first electrode and the second electrode is lower than or equal to a height of the corresponding position of the preset full milk value.

[0144] In a possible implementation manner of the eighth aspect, at least part of electric field lines between the first electrode and the second electrode pass through the full milk position.

[0145] In a possible implementation manner of the eighth aspect, the milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side surface in contact with the milk and an outer side surface not in contact with the milk.

[0146] In a possible implementation manner of the eighth aspect, the host comprises a host shell, the parallel capacitor group is arranged on the host shell, the host shell is mounted on the outer side surface of the milk storage container shell or at least partially in contact with the outer side surface of the milk storage container shell, and the parallel capacitor group is close to or in contact with the outer side surface of the milk storage container shell.

[0147] In the implementation manners, the non-contact milk full state detection is realized, and the milk is kept clean.

[0148] In a possible implementation manner of the eighth aspect, the host shell comprises an inner side surface forming an internal receiving space and an outer side surface opposite to the inner side surface, and the parallel capacitor group is arranged on the inner side surface of the host shell.

[0149] In the implementation manners, the non-contact milk full state detection is realized, and the milk is kept clean.

[0150] In a possible implementation manner of the eighth aspect, the milk storage container is provided with a milk discharge port, and in the milk rising direction in the milk storage container, the corresponding position of the preset milk full value is located below the milk discharge port of the milk storage container.

[0151] In the implementation manner, the corresponding position of the preset milk full value is located below the milk discharge port, and the corresponding position of the preset milk full value is still a certain distance away from the milk discharge port, so that after confirming the milk full state, even if a small amount of milk is sucked out of the breast shield and flows into the milk storage container, milk overflow does not occur.

[0152] In a possible implementation manner of the eighth aspect, the breast pump further comprises an angle sensor, and the angle sensor is configured to measure the inclination angle of the breast pump.

[0153] In the implementation manner, the angle sensor can assist in measuring whether it is a true milk full state.

[0154] In a possible implementation manner of the eighth aspect, the breast pump further comprises a vibration sensor, and the vibration sensor is configured to measure the vibration amplitude of the breast pump.

[0155] In the implementation manner, the vibration sensor can assist in measuring whether it is a true milk full state.

[0156] In a ninth aspect, the embodiments of the present application provide a milk full state determination method of a breast pump, applied to the breast pump in the eighth aspect and any possible implementation manner of the eighth aspect. The method comprises: obtaining a detection value of a capacitive sensor assembly; obtaining determination data in a case where the detection value is greater than a preset detection value; determining whether the determination data satisfies a true milk full condition; determining that the breast pump is in a true milk full state in a case where the determination data satisfies the true milk full condition; and determining that the breast pump is in a false milk full state in a case where the determination data does not satisfy the true milk full condition.

[0157] In the above scheme, in a case where the detection value is greater than the preset detection value, whether the true milk full condition is satisfied is determined by the determination data, which can prevent external interference from affecting the milk full detection and ensure detection accuracy.

[0158] In a possible implementation manner of the ninth aspect, in a case where the detection value is greater than the preset detection value, obtaining the determination data comprises: continuously obtaining a subsequent detection value in a case where the detection value is greater than the preset detection value; and determining whether the determination data satisfies the true milk full condition comprises: determining that the true milk full condition is satisfied in a case where the subsequent detection value continuously rises or remains within a preset time; and determining that the true milk full condition is not satisfied in a case where the subsequent detection value presents a non-continuous rising trend within the preset time.

[0159] In the above implementation manner, in a case where the detection value is greater than the preset detection value, whether the true milk full condition is satisfied is determined by the trend of the subsequent detection value, which can exclude false judgments caused by interference such as tilting of the milk storage container, liquid surface shaking, and milk liquid wall hanging, and improve detection accuracy.

[0160] In a possible implementation manner of the ninth aspect, the preset time ranges from 0.5 s to 3 s.

[0161] In a possible implementation manner of the ninth aspect, the non-continuous rising trend comprises one of a rising and then falling trend or a fluctuation trend.

[0162] In a possible implementation manner of the ninth aspect, in a case where the detection value is greater than the preset detection value, obtaining the determination data comprises: obtaining a tilting angle detected by an angle sensor; and determining whether the determination data satisfies the true milk full condition comprises: determining whether the breast pump is in a tilting state according to the tilting angle; determining that the true milk full condition is satisfied in a case where the breast pump is not in the tilting state; and determining that the true milk full condition is not satisfied in a case where the breast pump is in the tilting state.

[0163] In the above implementation manner, false milk full caused by tilting of a liquid surface when the breast pump is in a tilting state can be identified.

[0164] In a possible implementation manner of the ninth aspect, in the case that the detection value is greater than the preset detection value, the obtaining the judgment data comprises: obtaining a vibration amplitude detected by the vibration sensor; and the judging whether the judgment data satisfies the true milk full condition comprises: judging whether the breast pump is in a shaking state according to the vibration amplitude; in the case that the breast pump is not in the shaking state, judging that the true milk full condition is satisfied; and in the case that the breast pump is in the shaking state, judging that the true milk full condition is not satisfied.

[0165] In the above implementation manner, the false milk full caused by liquid surface shaking in the shaking state of the breast pump can be identified.

[0166] In a possible implementation manner of the ninth aspect, the method further comprises: in the case that it is determined that the breast pump is in the true milk full state, performing a preset operation; and the preset operation comprises any one or more of the following: controlling a prompt module in the breast pump to generate milk full prompt information, the prompt module comprising at least one of a display module, a sound emitting module and a vibration module; sending indication information to the breast pump in communication with the breast pump, the indication information being used to instruct the display module of the breast pump to display the milk full prompt information; and controlling the breast pump to stop milk pumping.

[0167] In the above implementation manner, the preset operation of the breast pump can be controlled in the true milk full state, so as to prevent milk overflow or remind the user to save the milk liquid.

[0168] In a possible implementation manner of the ninth aspect, the method further comprises: in the case that it is determined that the breast pump is in the true milk full state, determining the milk amount of the breast pump according to the milk full position and a mapping relationship; and the mapping relationship is used to indicate a corresponding relationship between the milk full position and the milk amount.

[0169] In the tenth aspect, the present application provides a milk full state judgment device of a breast pump, which is applied to the breast pump in the eighth aspect and any implementation manner of the eighth aspect, and the device comprises: a first obtaining unit configured to obtain a detection value of a capacitive sensor assembly; a second obtaining unit configured to obtain judgment data in the case that the detection value is greater than a preset detection value; a judgment unit configured to judge whether the judgment data satisfies a true milk full condition; a first determining unit configured to determine that the breast pump is in a true milk full state in the case that the judgment data satisfies the true milk full condition; and a second determining unit configured to determine that the breast pump is in a false milk full state in the case that the judgment data does not satisfy the true milk full condition.

[0170] In the eleventh aspect, the present application provides a breast pump, which comprises: at least one processor; and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the milk full state judgment method of the breast pump in the ninth aspect and any possible implementation manner of the ninth aspect.

[0171] In a twelfth aspect, an embodiment of the present application provides a computer readable storage medium, which stores an executable program. The executable program is executed by a processor to implement the milk full state determination method of the breast pump in the ninth aspect and any possible implementation manner of the ninth aspect.

[0172] In a thirteenth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. The computer program is executed by a processor to implement the milk full state determination method of the breast pump in the ninth aspect and any possible implementation manner of the ninth aspect.

[0173] The beneficial effects of the tenth aspect, the eleventh aspect, the twelfth aspect and the thirteenth aspect can refer to the ninth aspect, and will not be described here.

[0174] In a fourteenth aspect, an embodiment of the present application further provides another breast pump. The breast pump includes a milk storage container, a milk volume detection capacitor sensor assembly, a reference capacitor sensor assembly and a processing unit. The milk storage container is used to store milk. The milk volume detection capacitor sensor assembly is used to obtain a first detection value, and the first detection value includes a milk capacitor detection value of the current milk storage container. The reference capacitor sensor assembly is used to obtain a second detection value, and the second detection value includes a unit height milk detection value. The processing unit is used to determine a liquid level or a milk volume of the milk storage container according to the first detection value of the milk volume detection capacitor sensor assembly and the second detection value of the reference capacitor sensor assembly.

[0175] In the above scheme, because the dielectric constants of milk of different mothers are different, the dielectric constant is suddenly changed due to human touch interference, and the dielectric constant is suddenly changed due to process errors of the out-of-factory state of the breast pump due to manufacturing and assembly, etc. The influence of reasons causes the mapping relationship between the detection value of the capacitor sensor assembly and the liquid level or the milk volume is not fixed, which leads to inaccurate detection of the milk volume or the liquid level and large error. Therefore, by detecting the unit height milk detection value, the influence of the above interference on the liquid level or the milk volume detection is eliminated or reduced, and the liquid level or the milk volume detection precision is improved.

[0176] In a possible implementation manner of the fourteenth aspect, the milk volume detection capacitor sensor assembly and the reference capacitor sensor assembly are differential capacitor sensor assemblies.

[0177] In the above implementation manner, the differential capacitor sensor assembly can quantitatively measure the liquid level or the milk volume, so that the real liquid level or the milk volume can be determined according to the first detection value and the second detection value.

[0178] In a possible implementation manner of the fourteenth aspect, the differential capacitive sensor assembly includes a detection electrode assembly and a control circuit; the detection electrode assembly includes at least a set of oppositely arranged parallel capacitive groups, and each parallel capacitive group includes a first electrode and a second electrode; and the control circuit is configured to at least charge the detection electrode assembly and detect a capacitance value of the detection electrode assembly.

[0179] In a possible implementation manner of the fourteenth aspect, the first electrode and the second electrode are parallel plate electrodes.

[0180] In a possible implementation manner of the fourteenth aspect, the breast pump further includes a processing unit, the control circuit includes a conversion unit, and the conversion unit includes an excitation module, a sampling module and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal; and the processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0181] In a possible implementation manner of the fourteenth aspect, in a direction in which a milk surface rises, bottoms of the parallel capacitive groups of the milk amount detection capacitive sensor assembly and the reference capacitive sensor assembly are at a same height, and a top of the parallel capacitive groups of the milk amount detection capacitive sensor assembly is higher than a top of the parallel capacitive groups of the reference capacitive sensor assembly.

[0182] In the implementation manners described above, the two parallel capacitive groups have the same liquid surface height or milk amount detection range, and when the liquid surface height or the milk amount is in the same liquid surface height or milk amount detection range, the detection values of the two parallel capacitive groups can also be verified with each other, thereby guaranteeing detection accuracy.

[0183] In a possible implementation manner of the fourteenth aspect, in a direction in which a milk surface rises, a bottom of the parallel capacitive groups of the milk amount detection capacitive sensor assembly is higher than a top of the parallel capacitive groups of the reference capacitive sensor assembly.

[0184] In the implementation manners described above, the bottom of the parallel capacitive groups of the milk amount detection capacitive sensor assembly is higher than the top of the parallel capacitive groups of the reference capacitive sensor assembly, which can save required arrangement space and make the structure compact.

[0185] In a possible implementation manner of the fourteenth aspect, the breast pump further includes a host, and the host includes a housing, and the reference capacitive sensor assembly is arranged in the housing.

[0186] In a possible implementation manner of the fourteenth aspect, the milk storage container comprises an outer wall extending in the direction of the rising of the milk liquid surface, the main machine shell comprises a portion that is fitted to the outer wall of the milk storage container, and the milk volume detection capacitive sensor assembly is arranged in the portion of the main machine shell that is fitted to the outer wall of the milk storage container and extends in the direction of the rising of the milk liquid surface.

[0187] In a possible implementation manner of the fourteenth aspect, the reference capacitive sensor assembly is arranged in the portion of the main machine shell that is fitted to the outer wall of the milk storage container and is close to the bottom of the milk storage container.

[0188] In a possible implementation manner of the fourteenth aspect, the milk volume detection capacitive sensor assembly comprises a plurality of groups of parallel capacitors, the plurality of groups of parallel capacitors are used to detect different ranges of liquid surface heights or different ranges of milk volume values, and the plurality of groups of parallel capacitors have different height ranges in the direction of the rising of the milk liquid surface.

[0189] In the implementation manners described above, the plurality of groups of parallel capacitors are used to detect different ranges of liquid surface heights or different ranges of milk volume values, so that the detection accuracy of the milk volume or the liquid surface height can be improved.

[0190] In a possible implementation manner of the fourteenth aspect, the breast pump further comprises a breast shield and a main machine, the breast shield comprises a flange used to fit a breast, the milk storage container is used to receive and store the breast milk collected by the breast shield, the milk storage container is in communication with the breast shield, and the main machine comprises a negative pressure mechanism used to directly or indirectly apply a negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0191] In a fifteenth aspect, the embodiments of the present application further provide another breast pump, which comprises a milk storage container and an empty milk detection sensor assembly, the milk storage container is used to store milk liquid, and the empty milk detection sensor assembly is used to detect an empty milk state of the milk storage container, wherein the empty milk state comprises an empty milk condition and a non-empty milk condition.

[0192] In the technical solution described above, the empty milk detection sensor assembly is arranged to detect the empty milk state of the milk storage container, so that whether the mother has milk liquid discharged can be monitored in a timely manner.

[0193] In a possible implementation manner of the fifteenth aspect, the breast pump comprises a main machine, and the empty milk detection sensor assembly is arranged in the main machine.

[0194] In a possible implementation manner of the fifteenth aspect, the host includes a host shell, the empty milk detection sensor assembly includes a sensor unit, the sensor unit is arranged on the host shell, the host shell is mounted on or at least partially in contact with the outer side of the milk storage container shell, and the sensor unit is close to or in contact with the outer side of the milk storage container shell.

[0195] In the implementation manners, when the empty milk detection sensor assembly is a capacitive sensor assembly, the sensor unit includes a capacitive unit in the capacitive sensor assembly; when the capacitive sensor assembly is a differential capacitive sensor assembly, the capacitive unit includes a detection electrode assembly of the differential capacitive sensor assembly. When the empty milk detection sensor assembly is a photoelectric sensor assembly, the sensor unit includes a light emitter and a light receiver in the photoelectric sensor assembly. Thus, the empty milk state of the milk storage container is accurately detected by the sensor unit.

[0196] In a possible implementation manner of the fifteenth aspect, the empty milk detection sensor assembly is a photoelectric sensor assembly, at least a partial region of the milk storage container is a transparent or translucent structure, and the photoelectric sensor assembly detects the empty milk state of the milk storage container through the transparent or translucent structure on the milk storage container.

[0197] In the implementation manners, the empty milk state is detected by the photoelectric sensor assembly, and the detection accuracy is high.

[0198] In a possible implementation manner of the fifteenth aspect, the empty milk detection sensor assembly is a capacitive sensor assembly, the host includes a main body extending in the rising direction of the milk liquid surface, the milk storage container includes a side wall extending in the rising direction of the milk liquid surface, the main body is in contact with or close to the side wall, and the capacitive sensor assembly is arranged in the main body.

[0199] In the implementation manners, the empty milk state is detected by the capacitive sensor assembly, and the detection accuracy is high.

[0200] In a possible implementation manner of the fifteenth aspect, the empty milk detection sensor assembly includes a capacitive unit, and in the rising direction of the milk liquid in the milk storage container, the capacitive unit is arranged at a position close to the bottom of the milk storage container.

[0201] In a possible implementation manner of the fifteenth aspect, the host further includes a mounting hole, the breast pump further includes a breast shield for pumping out milk liquid, the breast shield is arranged in the host through the mounting hole, the empty milk detection sensor assembly includes a capacitive unit, and the capacitive unit is arranged at a position close to the mounting hole of the main body.

[0202] In the implementation mode, the empty milk state of the milk storage container is determined by detecting whether the breast shield inserted into the installation hole has milk flowing through, thereby ensuring the timeliness of the detection of the empty milk state.

[0203] In a possible implementation mode of the fifteenth aspect, the host further comprises a base located below a bottom wall of the milk storage container, the milk storage container comprises a bottom wall connected to the side wall, and the base contacts or is close to the bottom wall; the empty milk detection sensor assembly comprises a capacitive unit, and the milk storage container is installed above the base, and the capacitive unit is arranged on the base.

[0204] In a possible implementation mode of the fifteenth aspect, the host comprises a component arrangement layer and a sensor arrangement layer; the sensor arrangement layer is arranged between the component arrangement layer and the shell; the empty milk detection sensor assembly comprises a capacitive unit, and the capacitive unit is arranged on a side of the sensor arrangement layer close to the shell.

[0205] In a possible implementation mode of the fifteenth aspect, the milk storage container comprises a shell, and the shell comprises a bottom wall; the empty milk detection sensor assembly is arranged on an outer side of the bottom wall or an inner side of the bottom wall.

[0206] In a possible implementation mode of the fifteenth aspect, the capacitive sensor assembly is a differential capacitive sensor.

[0207] In a possible implementation mode of the fifteenth aspect, the differential capacitive sensor assembly comprises a control circuit and a detection electrode assembly; the detection electrode assembly comprises at least one set of oppositely arranged parallel capacitive groups, and each parallel capacitive group comprises a first electrode and a second electrode; the control circuit is configured to at least charge the detection electrode assembly and detect a capacitance value of the detection electrode assembly.

[0208] In a possible implementation mode of the fifteenth aspect, the first electrode and the second electrode are parallel plate electrodes.

[0209] In a possible implementation mode of the fifteenth aspect, the breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module and a conversion module; the excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal; the processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

[0210] In a possible implementation manner of the fifteenth aspect, the breast pump further includes: a breast shield including a flange for fitting a breast; the milk storage container is configured to receive and store the breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield; and the main machine includes a negative pressure mechanism configured to directly or indirectly apply negative pressure to the breast shield to suck the breast milk into the milk storage container.

[0211] In a possible implementation manner of the fifteenth aspect, the milk sucked by the breast pump flows into the milk storage container from a milk inlet, and the empty milk detection sensor assembly is arranged at a milk inlet position of the milk inlet.

[0212] In a possible implementation manner of the fifteenth aspect, the empty milk detection sensor assembly is arranged at least partially below the milk inlet in a direction in which the milk level rises.

[0213] In a possible implementation manner of the sixteenth aspect, the method includes: obtaining a detection value of the empty milk detection sensor assembly; and controlling the breast pump to switch from a first working mode to a second working mode in a case where it is determined according to the detection value that the breast pump is in a non-empty milk state.

[0214] In the above technical solution, when it is monitored that milk is discharged, the breast pump is switched in time, which can prevent pain caused by breast pumping when the mother has no milk secretion, and can improve the breast pumping efficiency by pumping milk when the mother has milk secretion.

[0215] In a possible implementation manner of the sixteenth aspect, the step of controlling the breast pump to switch from the first working mode to the second working mode includes: controlling the breast pump to switch from a milk secretion stimulation mode to a breast pumping mode.

[0216] In the above implementation manner, the effect of stimulating milk secretion is monitored, which can prevent the milk from being pumped for a long time when the mother has no milk secretion, increase the effective use time of the breast pump, prevent the milk from being pumped for a long time when the mother has no milk secretion, and improve the breast pumping efficiency by pumping milk when the mother has milk secretion.

[0217] In a possible implementation manner of the sixteenth aspect, the milk secretion stimulation mode includes at least one of a simulated sucking function, a hot compress function, a vibration function, a massage function, and an electric stimulation function.

[0218] In a possible implementation manner of the sixteenth aspect, the control of the breast pump from the first working mode to the second working mode comprises: control of the breast pump from a first breast pumping mode to a second breast pumping mode; and at least one of a breast pumping frequency and a breast pumping strength in the second breast pumping mode is greater than that in the first breast pumping mode.

[0219] In the above implementation manner, the breast pumping is first performed in the relaxed working mode, and then switched to the more efficient breast pumping mode after the milk is discharged, so that pain caused by breast pumping when the mother has no milk secretion is prevented, and the breast pumping efficiency is improved.

[0220] In the seventeenth aspect, the present application provides a control device of a breast pump, which is applied to the breast pump in the fifteenth aspect and any possible implementation manner of the fifteenth aspect. The device comprises: an acquisition unit configured to acquire a detection value of a milk empty detection sensor assembly; and a control unit configured to control the breast pump from a first working mode to a second working mode when it is determined according to the detection value that the breast pump is in a non-milk empty state.

[0221] In the eighteenth aspect, the present application provides a breast pump, which comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the control method of the breast pump in the sixteenth aspect and any possible implementation manner of the sixteenth aspect.

[0222] In the nineteenth aspect, the present application provides a computer readable storage medium, which stores an executable program, and the executable program is executed by a processor to implement the control method of the breast pump in the sixteenth aspect and any possible implementation manner of the sixteenth aspect.

[0223] In the twentieth aspect, the present application provides a computer program product comprising a computer program, which is executed by a processor to implement the control method of the breast pump in the sixteenth aspect and any possible implementation manner of the sixteenth aspect.

[0224] The technical effects brought by the seventeenth, eighteenth, nineteenth and twentieth aspects or any possible implementation manner thereof can be referred to the technical effects brought by the sixteenth aspect or different possible implementation manners of the sixteenth aspect, which will not be described herein.

[0225] In a twenty-first aspect, the embodiments of the present application provide a milk full detection method of a breast pump, the method comprising: obtaining detection data of a milk full detection sensor; obtaining judgment data in a case where the detection data meets a preset condition; judging whether the judgment data meets a true milk full condition; determining the breast pump as being in a true milk full state in a case where the judgment data meets the true milk full condition; and determining the breast pump as being in a false milk full state in a case where the judgment data does not meet the true milk full condition.

[0226] In the above scheme, in a case where the detection value is greater than the preset detection value, whether the true milk full condition is met is judged by the judgment data, which can prevent the influence of external interference on the milk full detection and ensure the detection accuracy.

[0227] In a possible implementation manner of the twenty-first aspect, the detection data of the milk full detection sensor comprises: a detection value of the milk full detection sensor.

[0228] In a possible implementation manner of the twenty-first aspect, the milk full detection sensor comprises at least one of the following sensors: a differential capacitor sensor assembly, a pressure sensor, an ultrasonic sensor, and a photoelectric sensor.

[0229] In a possible implementation manner of the twenty-first aspect, the milk full detection sensor is the differential capacitor sensor assembly, the differential capacitor sensor assembly comprises a parallel capacitor assembly and a control circuit, the parallel capacitor assembly comprises oppositely arranged first and second electrodes, and the control circuit is configured to charge the parallel capacitor assembly and detect a capacitance value of the parallel capacitor assembly.

[0230] In the above implementation manner, the differential capacitor sensor assembly can quantitatively detect the liquid level height, has good anti-interference effect, and can be arranged on the outer side of the main machine or the milk storage container shell without contacting the milk, thereby realizing non-contact measurement.

[0231] In a possible implementation manner of the twenty-first aspect, the detection value is a capacitance detection value, and obtaining the judgment data in a case where the detection data meets the preset condition comprises: continuously obtaining subsequent capacitance detection values in a case where the capacitance detection value is greater than a preset capacitance detection value; and judging whether the judgment data meets the true milk full condition comprises: judging that the true milk full condition is met in a case where the subsequent capacitance detection values continuously increase or remain within a preset time; and judging that the true milk full condition is not met in a case where the subsequent capacitance detection values have a non-continuous increasing trend within the preset time.

[0232] In the above implementation manner, in a case where the detection value is greater than the preset detection value, whether the true milk full condition is met is judged by the trend of the subsequent detection value, which can exclude false judgments caused by the interference of the inclination of the milk storage container, the shaking of the liquid level, the wall-hanging of the milk, and the like, and improve the detection accuracy.

[0233] In a possible implementation manner of the twenty-first aspect, the preset time ranges from 0.5s to 3s.

[0234] In a possible implementation manner of the twenty-first aspect, the non-continuous rising trend comprises one of a rising and then falling trend or a fluctuating trend.

[0235] In a possible implementation manner of the twenty-first aspect, the detection data of the milk fullness sensor comprises a detection level signal of the milk fullness detection sensor.

[0236] In a possible implementation manner of the twenty-first aspect, the milk fullness detection sensor comprises any one of an inductive capacitive sensor or a photoelectric sensor.

[0237] In a possible implementation manner of the twenty-first aspect, when the detection data meets the preset condition, the obtaining of the judgment data comprises: when the detection level signal at the first time is a preset level signal, obtaining a plurality of detection level signals from the first time to a second time; the second time is after the first time; and determining whether the judgment data meets the true milk fullness condition comprises: when all the plurality of detection level signals are the preset level signal, determining that the true milk fullness condition is met; and when at least one of the plurality of detection level signals is not the preset level signal, determining that the true milk fullness condition is not met.

[0238] In the above implementation manner, when the detection level signal is the preset level signal, the true milk fullness is determined by the subsequent plurality of detection level signals, which can eliminate false judgments caused by the interference of the inclined storage container, the liquid surface shaking, the milk liquid hanging on the wall, and the like, and improve the detection accuracy.

[0239] In a possible implementation manner of the twenty-first aspect, when the detection data meets the preset condition, the obtaining of the judgment data comprises: obtaining an inclination angle detected by the angle sensor; and determining whether the judgment data meets the true milk fullness condition comprises: determining whether the breast pump is in an inclined state according to the inclination angle; when the breast pump is not in the inclined state, determining that the true milk fullness condition is met; and when the breast pump is in the inclined state, determining that the true milk fullness condition is not met.

[0240] In the above implementation manner, the false milk fullness caused by the inclined liquid surface when the breast pump is in the inclined state can be identified.

[0241] In a possible implementation manner of the twenty-first aspect, in a case where the detection data meets the preset condition, the obtaining the judgment data comprises: in a case where the detection data meets the preset condition, obtaining a vibration amplitude detected by the vibration sensor; and determining whether the judgment data meets a true milk full condition comprises: determining whether the breast pump is in a shaking state according to the vibration amplitude; in a case where the breast pump is not in the shaking state, determining that the true milk full condition is met; and in a case where the breast pump is in the shaking state, determining that the true milk full condition is not met.

[0242] In the implementation manners described above, the false milk full caused by liquid surface shaking in a shaking state of the breast pump can be identified.

[0243] In a possible implementation manner of the twenty-first aspect, the method further comprises: in a case where it is determined that the breast pump is in the true milk full state, performing a preset operation; and the preset operation comprises any one or more of the following: controlling a prompt module in the breast pump to generate milk full prompt information, the prompt module comprising at least one of a display module, a sound emitting module and a vibration module; sending indication information to an electronic device in communication with the breast pump, the indication information being used to instruct the display module of the electronic device to display the milk full prompt information; and controlling the breast pump to stop milk pumping.

[0244] In the implementation manners described above, the preset operation can be performed on the breast pump in the true milk full state, so as to prevent milk overflow or remind the user to save the milk

[0245] In a possible implementation manner of the twenty-first aspect, the method further comprises: in a case where it is determined that the breast pump is in the true milk full state, determining the milk amount of the breast pump according to a mapping relationship between the milk full position and the milk amount; and the mapping relationship is used to indicate a corresponding relationship between the milk full position and the milk amount.

[0246] In a twenty-second aspect, an embodiment of the present application provides a milk full detection device of a breast pump, which comprises: a first obtaining unit configured to obtain detection data of an electrode type capacitive sensor assembly; a second obtaining unit configured to obtain judgment data in a case where the detection data meets a preset condition; a judgment unit configured to determine whether the judgment data meets a true milk full condition; a first determining unit configured to determine that the breast pump is in a true milk full state in a case where the judgment data meets the true milk full condition; and a second determining unit configured to determine that the breast pump is in a false milk full state in a case where the judgment data does not meet the true milk full condition.

[0247] In a twenty-third aspect, an embodiment of the present application provides a breast pump, which comprises: at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the milk full detection method of the breast pump in the twenty-first aspect and any one of the possible implementation manners of the twenty-first aspect.

[0248] In a twenty-fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores an executable program. The executable program is executed by a processor to implement the milk fullness detection method of the breast pump in the twenty-first aspect and any possible implementation manner of the twenty-first aspect.

[0249] In a twenty-fifth aspect, an embodiment of the present application provides a computer program product, which comprises a computer program. The computer program is executed by a processor to implement the milk fullness detection method of the breast pump in the twenty-first aspect and any possible implementation manner of the twenty-first aspect.

[0250] The beneficial effects of the twenty-second aspect, the twenty-third aspect, the twenty-fourth aspect and the twenty-fifth aspect can refer to the twenty-first aspect, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0251] FIG. 1 is a first perspective view of a breast pump provided by an embodiment of the present application.

[0252] FIG. 2 is a first exploded view of the breast pump provided by an embodiment of the present application.

[0253] FIG. 3 is a second exploded view of the breast pump provided by an embodiment of the present application.

[0254] FIG. 4 is a schematic view of a parallel-plate capacitor provided by an embodiment of the present application.

[0255] FIG. 5 is a detection principle diagram of a differential capacitive sensor assembly provided by an embodiment of the present application.

[0256] FIG. 6 is a liquid level detection principle diagram of the differential capacitive sensor assembly provided by an embodiment of the present application.

[0257] FIG. 7 is a setting diagram of the differential capacitive sensor assembly on a host shell provided by an embodiment of the present application.

[0258] FIG. 8 is a flow diagram of a first embodiment of the milk fullness state judgment method of the breast pump of the present application.

[0259] FIG. 9 is a structural diagram of an embodiment of the milk fullness state judgment device of the breast pump of the present application.

[0260] FIG. 10 is a flow diagram of another embodiment of the milk fullness state judgment method of the breast pump of the present application.

[0261] FIG. 11 is a structural diagram of a breast pump provided by an embodiment of the present application.

[0262] FIG. 12 is a structural block diagram of a computer readable storage medium provided by an embodiment of the present application.

[0263] Fig. 13 is a schematic diagram of a main machine of a first type of breast pump with a hidden shell according to an embodiment of the present application.

[0264] Fig. 14 is a schematic diagram of a first arrangement of a differential capacitive sensor assembly for measuring liquid level or milk volume on a main machine shell according to an embodiment of the present application.

[0265] Fig. 15 is a schematic diagram of a second arrangement of a differential capacitive sensor assembly for measuring liquid level or milk volume on a main machine shell according to an embodiment of the present application.

[0266] Fig. 16 is a schematic diagram of a third arrangement of a differential capacitive sensor assembly for measuring liquid level or milk volume on a main machine shell according to an embodiment of the present application.

[0267] Fig. 17 is a schematic diagram of a fourth arrangement of a differential capacitive sensor assembly for measuring liquid level or milk volume on a main machine shell according to an embodiment of the present application.

[0268] Fig. 18 is a schematic diagram of a fifth arrangement of a differential capacitive sensor assembly for measuring liquid level or milk volume on a main machine shell according to an embodiment of the present application.

[0269] Fig. 19 is a schematic diagram of a first arrangement of a differential capacitive sensor assembly in a sensor arrangement layer according to an embodiment of the present application.

[0270] Fig. 20 is a schematic diagram of a second arrangement of a differential capacitive sensor assembly in a sensor arrangement layer according to an embodiment of the present application.

[0271] Fig. 21 is a schematic diagram of a third arrangement of a differential capacitive sensor assembly in a sensor arrangement layer according to an embodiment of the present application.

[0272] Fig. 22 is a schematic diagram of a differential capacitive sensor assembly for measuring empty milk state according to an embodiment of the present application.

[0273] Fig. 23 is a schematic diagram of a detection principle of a differential capacitive sensor assembly for simultaneously detecting empty milk state and unit height milk liquid detection value according to an embodiment of the present application.

[0274] Fig. 24 is a schematic diagram of a first combined arrangement of a plurality of differential capacitive sensor assemblies according to an embodiment of the present application.

[0275] Fig. 25 is a schematic diagram of a second combined arrangement of a plurality of differential capacitive sensor assemblies according to an embodiment of the present application.

[0276] Fig. 26 is a schematic diagram of a third combined arrangement of a plurality of differential capacitive sensor assemblies according to an embodiment of the present application.

[0277] Fig. 27 is a schematic diagram of a fourth combined arrangement of multiple groups of differential capacitive sensor assemblies according to embodiments of the present application.

[0278] Fig. 28 is a schematic diagram of a fifth combined arrangement of multiple groups of differential capacitive sensor assemblies according to embodiments of the present application.

[0279] Fig. 29 is a first perspective view of a second type of breast pump according to embodiments of the present application.

[0280] Fig. 30 is a first exploded view of a second type of breast pump according to embodiments of the present application.

[0281] Fig. 31 is a schematic diagram of a main unit of a second type of breast pump according to embodiments of the present application.

[0282] Fig. 32 is a first schematic diagram of a milk storage container of a second type of breast pump according to embodiments of the present application.

[0283] Fig. 33 is a second schematic diagram of a milk storage container of a second type of breast pump according to embodiments of the present application.

[0284] Fig. 34 is a schematic diagram of a method of detecting a fullness state according to embodiments of the present application.

[0285] Fig. 35 is a first arrangement of a photoelectric sensor according to embodiments of the present application.

[0286] Fig. 36 is a second arrangement of a photoelectric sensor according to embodiments of the present application.

[0287] Fig. 37 is a flowchart of a method of controlling a breast pump according to embodiments of the present application.

[0288] Fig. 38 is a schematic diagram of a third type of breast pump according to embodiments of the present application. DETAILED DESCRIPTION

[0289] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments shown in the drawings are exemplary and are only used to explain the present application and should not be understood as limiting the present application. In addition, it should be understood that the specific embodiments described herein are only used to explain the present application and should not be understood as limiting the present application.

[0290] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0291] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0292] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two units or the interaction relationship between two units. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0293] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "above", "over" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0294] The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. For the purpose of simplifying the present disclosure, certain examples of components and arrangements are described. These are, of course, merely examples and are in no way limiting of the present application. For example, like reference numerals are used to describe and identify like elements throughout the different examples. Also, descriptions of well-known functions and constructions can be omitted for clarity and conciseness. The examples described herein are not meant to limit application and variations thereof unless other wise indicated.

[0295] Referring to FIG. 1, FIG. 2 and FIG. 3, FIG. 1 is a first perspective view of an embodiment of a breast pump, FIG. 2 is a first exploded view of the breast pump, and FIG. 3 is a second exploded view of the breast pump.

[0296] As shown in FIG. 1 to FIG. 3, the breast pump 1 comprises a breast shield 10, a milk storage container 20 and a main machine 30.

[0297] The breast shield 10 is used to cover the human breast and fit the breast. The breast shield 10 is a flange shaped like a horn for fitting the breast, and the milk storage container 20 comprises a nipple accommodating portion 22 for accommodating the nipple. In some cases, the nipple accommodating portion 22 can also be arranged in the breast shield 10.

[0298] The milk storage container 20 is used to receive and store the breast milk collected by the breast shield 10, and the milk storage container 20 is in communication with the breast shield 10.

[0299] Optionally, the milk storage container 20 can be in the form of a milk cover, a milk bowl, a milk bottle, etc., which is not limited in the present application.

[0300] The main machine 30 is also provided with a negative pressure mechanism, which can directly or indirectly apply negative pressure to the breast shield 10 to suck the breast milk into the milk storage container 20.

[0301] The negative pressure mechanism includes but is not limited to a piezoelectric pump, a diaphragm pump, a hydraulic pump, a mechanical pump, etc.

[0302] Optionally, the main machine 30 can also comprise one or more of the following components: a power supply module, a negative pressure gas circuit, a control circuit board, a solenoid valve, etc.

[0303] Specifically, the power supply module can be a storage battery, a dry battery, or can be directly connected to an external power supply through a power cord.

[0304] The host 30 is also provided with a mounting hole 32, and the breast shield 10 is arranged in the host through the mounting hole 32 and is in liquid communication with the milk storage container 20. The breast milk sucked by the breast shield 10 flows into the milk storage container 20 through the one-way valve assembly 24.

[0305] The milk storage container 20 comprises a milk storage container shell 21, a nipple passage 22, a negative pressure cabin 23, a one-way valve assembly 24, a diaphragm cover 25, an air hole 26 and a milk pouring opening 27.

[0306] The milk storage container shell 21 comprises a first shell 211 and a second shell 212, and the second shell 212 is attached to or close to the host 30. The first shell 211 can be integrally formed with the second shell 212 or detachably mounted with the second shell 212. The mounting edges of the first shell 211 and the second shell 212 are provided with sealing rings or other sealing mechanisms to ensure that the milk liquid does not leak from the mounting edges.

[0307] The negative pressure cabin 23 comprises a diaphragm (not shown in the figure), and the diaphragm cover 25 is fixedly mounted on the negative pressure cabin 23 and seals the diaphragm. The diaphragm cover 25 is also provided with the air hole 26, and the host 30 is also provided with a negative pressure socket 38 which is inserted into the air hole 26. Thus, the host 30 indirectly applies negative pressure to the negative pressure cabin 23 through the diaphragm, so that the user produces milk liquid which is collected by the breast shield 10.

[0308] The milk liquid collected by the breast shield 10 enters the space in the milk storage container through the one-way valve assembly 24. The breast pump 1 performs the process of milk sucking and air intake in cycles. When the breast pump 1 performs the milk sucking process, the valve of the one-way valve assembly 24 is closed, and when the breast pump 1 performs the air intake process, the valve of the one-way valve assembly 24 is opened.

[0309] Optionally, the part of the host 30 which is attached to and / or close to the milk storage container is a host shell 31 which is mounted on the outer side of the milk storage container shell 21 or at least partially contacts the outer side of the milk storage container shell 21. Preferably, the host shell 31 comprises an inner side which forms an internal receiving space and an outer side opposite to the inner side. The capacitive sensor assembly is arranged on the inner side of the host shell 31 to provide better protection for the sensor.

[0310] The above describes the structure of a breast pump, but the above structure is only an example for more clearly describing the present application, and does not mean that the present scheme can only be applied to the breast pump shown in FIGS. 1 to 3. For example, the breast pump can also be of a type in which the host is mounted above the milk storage container or a type in which the host is connected to the negative pressure cabin cover through a three-way joint.

[0311] The following describes the capacitive sensor assembly. Specifically, the capacitive sensor is a conversion device that converts a measured physical or mechanical quantity into a change in capacitance. In other words, it is a capacitor with a variable parameter. When the capacitance of the capacitive sensor changes, the amount of charge on the plates changes, thereby establishing a correspondence between the amount of charge change and the measured physical or mechanical quantity, and achieving recognition of the measured physical or mechanical quantity. The capacitive sensor assembly in the present application includes one of an inductive capacitive sensor assembly and a differential capacitive sensor assembly.

[0312] Next, the basic principle of a parallel plate capacitor is described, which is the basis for constructing a capacitive sensor. Referring to FIG. 4, which is a schematic diagram of a parallel plate capacitor according to an embodiment of the present application.

[0313] As shown in FIG. 4, the first electrode and the second electrode are mutually parallel metal conductors, also known as plates or electrodes. There is a uniform electric field distribution between the two electrodes. Due to the edge effect, the electric field lines at the edges of the capacitor are curved and divergent.

[0314] The capacitance calculation formula of the parallel plate capacitor is as follows:

[0315] wherein ε r is the dielectric constant of the material between the plates, S is the facing area of the two electrodes of the capacitor, ε0 is the dielectric constant of free space (8.85 x 10 -12 F / m), and d is the distance between the two electrodes of the capacitor.

[0316] In FIG. 4, S is equal to W multiplied by L.

[0317] FIGS. 5-6 are the basic principle of differential capacitive detection according to an embodiment of the present application. In this embodiment, a differential capacitive sensor assembly is used as a sensor for detecting the state parameters of the milk storage container in the breast pump. The differential capacitive sensor assembly includes a detection electrode assembly, which includes a capacitor composed of two mutually parallel and oppositely arranged electrodes. The differential capacitive sensor assembly is used to detect the mutual capacitance between the two electrodes of the capacitor. The output result is no longer a high-low level signal, but a capacitance change value between the two electrodes or a digital signal converted from the capacitance change value.

[0318] For the convenience of description, the capacitance formed by two electrodes arranged in parallel and opposite to each other in the differential capacitance sensor assembly is referred to as a parallel capacitance group. In one possible implementation, the parallel capacitance group is a standard parallel-plate capacitor shown in FIG. 6, and the parallel capacitance group in FIG. 6 includes a first electrode 1000 and a second electrode 2000, and the facing planes of the two electrodes are completely aligned. In another possible implementation, the facing planes of the two electrodes of the parallel capacitance group are only partially aligned, and the partial areas of the first electrode and the second electrode are staggered.

[0319] In addition, the differential capacitance sensor assembly in the present application includes, in addition to the parallel capacitance group, a control circuit connected to the parallel capacitance group, as shown in FIG. 5, and the control circuit is used to charge the parallel capacitance group and collect the electric charge on the parallel capacitance group after a preset time, and determine the capacitance value of the parallel capacitance group according to the electric charge change speed and / or the electric charge change amount.

[0320] The control circuit includes a conversion unit, and the conversion unit includes an excitation module, a sampling module, and a conversion module. The excitation module generates a charging signal for charging the differential capacitance sensor assembly, the electric charge on the differential capacitance sensor assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal. The conversion module is connected to a processing unit, and the processing unit is used to calculate a state parameter of the milk storage container corresponding to the differential capacitance sensor assembly according to the digital signal.

[0321] Optionally, the conversion unit is a capacitance-to-digital converter, and the conversion module is an analog-to-digital converter (ADC).

[0322] The conversion unit will be further described below, and please refer to FIG. 5, which is a detection principle diagram of the differential capacitance sensor assembly provided in the embodiments of the present application. As shown in FIG. 5, the detection electrode assembly is connected to the conversion unit, and the sampling module in the control circuit in FIG. 5 includes a switched-capacitor circuit and a sample-and-hold circuit.

[0323] The excitation module is used to generate an excitation signal, and the excitation signal is used to charge the parallel capacitance group in the detection electrode assembly. In some cases, the excitation signal is generated by an oscillator in the excitation module. In other cases, the excitation signal is generated by a clock signal received by the excitation module. The present application does not make any limitation.

[0324] The switched-capacitor circuit is used to close the switch at an appropriate time to transfer the electric charge on the parallel capacitance group to the input end of the ADC.

[0325] The sample-and-hold circuit is used to keep the voltage on the parallel capacitance group stable before the conversion module converts, so as to ensure that the analog-to-digital converter reads a stable voltage value during the conversion process.

[0326] The conversion module is configured to convert the analog voltage into a digital signal and input the digital signal to the processing unit (not shown in FIG. 5). In some cases, the conversion module also performs a digital filtering operation during the conversion process to improve the conversion accuracy.

[0327] The processing unit is configured to determine the state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal and a preset mapping relationship.

[0328] The structure of the control circuit is only illustrative. In some embodiments, the control circuit can further include more or fewer components than those shown, or combine some components, or split some components, or different component arrangements. The components shown can be implemented in hardware, software, or a combination of software and hardware. For example, part or all of the functions of the conversion unit can be integrated into the processing unit to save space, or the processing unit can be added to the conversion unit, which is not limited in the present application.

[0329] An embodiment of the electrode capacitive sensor assembly for detecting the liquid level will be described below.

[0330] Referring to FIG. 6, FIG. 6 is a schematic diagram of a liquid level detection principle of the differential capacitive sensor assembly according to an embodiment of the present application. The control circuit is not shown in FIG. 6.

[0331] As shown in FIG. 6, FIG. 6 includes straight electric field lines that point from the facing plane of the first electrode 1000 to the facing plane of the second electrode 2000, and also includes curved electric field lines that point from the side of the first electrode 1000 to the side of the second electrode 2000. The curved electric field lines pass through the liquid storage space of the container. Because the dielectric constant of the liquid is much greater than that of the air, the dielectric constant between the two electrodes gradually increases as the liquid level rises, so that the capacitance value of the parallel capacitor group increases.

[0332] It can be understood that only part of the electric field lines of the parallel capacitor group is shown in FIG. 6, and the differential capacitive sensor assembly is used to detect whether the liquid level reaches the position corresponding to the preset full milk value, that is, to detect whether the liquid level reaches the position corresponding to the preset full milk value.

[0333] The capacitance change of the differential capacitive sensor assembly in FIG. 6 has a proportional relationship with the change of the liquid level, so after the capacitance change is converted into a specific digital signal change, the specific change amount of the liquid level can be calculated according to the digital signal change. The capacitance change of the inductive capacitive sensor does not have a proportional relationship with the change of the liquid level, and the processing unit can only determine whether the liquid level reaches the corresponding height of the inductive capacitive sensor through the high level signal or the low level signal output by the inductive capacitive sensor.

[0334] Optionally, the first electrode and the second electrode are further provided with a shielding layer 3000 away from the side of the container, so as to reduce external interference. It is defined that the first electrode and the second electrode detect the liquid level of the container through the electric field lines of the first side surface, and the above case can also be understood as that a sensor setting layer is arranged near the second side surface opposite to the first side surface, so as to block the electric field lines of the second side surface, thereby reducing external interference.

[0335] In FIG. 6, d1 is the distance between the two opposite planes of the first electrode and the second electrode, and d2 is the distance between the first electrode and the second electrode and the liquid storage space of the container. The distance d1 between the two opposite planes of the first electrode and the second electrode of the parallel capacitor group is referred to as the pitch of the differential capacitive sensor assembly, and the pitch d1 of the parallel capacitor group is proportional to the detection distance. In order to ensure that the differential capacitive sensor assembly can detect the change of the liquid level of the liquid storage space, it is necessary to ensure that d1 is greater than or equal to d2.

[0336] Exemplarily, assuming that the maximum detection distance of the parallel capacitor group in FIG. 6 is d2, when the container is away from the differential capacitive sensor assembly, so that the distance between the container and the differential capacitive sensor assembly is greater than d2, the pitch d1 can be increased, thereby increasing the detection range of the parallel capacitor group.

[0337] The capacitors in the capacitive sensor assembly in the present application, for example, the parallel capacitor group of the differential capacitive sensor assembly, can be arranged in any one of the following arrangement regions:

[0338] 1. The second housing 212 does not contact the outer side surface of the milk liquid.

[0339] 2. The first housing 211 does not contact the outer side surface of the milk liquid.

[0340] 3. The main machine housing 31 in the main machine 30 is close to the outer side surface of the milk storage container 20 or away from the inner side surface of the milk storage container 20.

[0341] Among them, the capacitive sensor assembly is used to detect whether the milk liquid in the milk storage container reaches the corresponding position of the preset milk full value. The preset milk full value of the inductive capacitive sensor assembly is a high level signal, that is, when the inductive capacitive sensor assembly outputs a high level signal, it is considered that the milk liquid reaches the corresponding position. The preset milk full value of the differential capacitive sensor assembly is a preset capacitance value, that is, when the capacitance detection value output by the differential capacitive sensor assembly reaches the preset capacitance value, it is considered that the milk liquid reaches the corresponding position.

[0342] The preset milk full value can reflect a full filling of the milk storage container, or a preset threshold close to the milk full state, more preferably a certain distance from the full milk to reserve the milk inertia caused by milk overflow, or other reasonable threshold close to the milk full state. The non-milk full state refers to the milk amount stored in the milk storage container not reaching the preset milk full value. The specific value of the preset milk full value can be set as needed, and the present application does not make any limitation.

[0343] Please refer to Fig. 7 again, which is a schematic diagram of the setting of the differential capacitive sensor assembly on the main machine shell provided by the embodiment of the present application.

[0344] It should be noted that only the specific setting mode of the parallel capacitor group in the differential capacitive sensor assembly is shown in Fig. 7, and the control circuit is not shown. However, this does not mean that the differential capacitive sensor assembly does not need a control circuit, nor does it mean that the control circuit is not set in the drawings of the present application. The drawings of the present application are only examples and should not constitute any limitation on the embodiments of the present application.

[0345] For ease of illustration, the milk outlet 27 in the milk storage container 20 is projected into the main machine shell 31 in Fig. 7. It can be understood that the milk outlet 27 refers to the milk outlet in the milk storage container for the user to pour out.

[0346] For ease of illustration, the rising direction of the milk liquid level when the breast pump is correctly worn is shown by a dashed line in Fig. 7, i.e., the X direction in the figure.

[0347] And the corresponding position of the preset milk full value in Fig. 7 is shown by a dashed line and the letter A in Fig. 7. It can be understood that the corresponding position of the preset milk full value shown in Fig. 7 is only an example, and the corresponding position of the preset milk full value can be set at a higher or lower position in the rising direction of the milk liquid level.

[0348] For ease of illustration, the corresponding position of the preset milk full value is referred to as the milk full position hereinafter.

[0349] Among them, in the rising direction of the milk liquid in the milk storage container, the height of the bottom of the first electrode and the second electrode is lower than or equal to the height of the corresponding position of the preset milk full value. The above implementation mode can detect that the liquid level is close to the milk full position in advance, thereby excluding disturbances such as liquid level shaking through judgment conditions such as continuous rising of the detection value, and improving the detection accuracy of the milk full position.

[0350] Among them, at least part of the electric field lines between the first electrode and the second electrode pass through the milk full position.

[0351] Further, in the milk liquid rising direction in the milk storage container in FIG. 7, the milk full position is arranged below the milk outlet 27 of the milk storage container, so that the milk full position and the milk outlet 27 are still a distance apart. Therefore, after the milk full position is confirmed, even if a small amount of milk liquid is sucked out of the breast shield and flows into the milk storage container, milk liquid overflow will not occur.

[0352] Further, in order to prevent false recognition of the liquid surface reaching the milk full position due to the liquid surface tilting, in one possible implementation, the breast pump further comprises an angle sensor for measuring the tilting angle of the breast pump.

[0353] Further, in order to prevent false recognition of the liquid surface reaching the milk full position due to the liquid surface tilting, in one possible implementation, the breast pump further comprises an angle sensor for measuring the tilting angle of the breast pump.

[0354] In combination with the structure of any of the above embodiments, the present application further proposes a milk full state judgment method of a breast pump. Please refer to FIG. 8, which is a flowchart of a milk full state judgment method of a breast pump according to an embodiment of the present application. As shown in FIG. 8, the method 100 comprises steps 110 to 150.

[0355] Step 110: Obtain the detection value of the capacitive sensor assembly.

[0356] Step 120: Obtain the judgment data in the case that the detection value is greater than the preset detection value.

[0357] Specifically, if the capacitive sensor assembly is a differential capacitive sensor assembly, then:

[0358] In one possible implementation, the preset detection value can be equal to the above-mentioned preset milk full value. In order to exclude external interference and prevent false recognition of the milk full position, after the detection value obtained by the capacitive sensor assembly is greater than the preset milk full value, it is not directly considered as a true milk full position, but further judgment data is obtained to verify whether it is a true milk full position.

[0359] In one possible implementation, the preset detection value can be less than the above-mentioned preset milk full value.

[0360] Wherein, for the specific value of the preset milk full value, different structures of the breast pump and different milk full positions will correspond to different preset milk full values, which are not limited by the present application.

[0361] Specifically, if the capacitive sensor assembly is an inductive capacitive sensor assembly, then:

[0362] The preset detection value is 1, and when the capacitive sensor assembly is an inductive capacitive sensor assembly, the high-level signal output by the capacitive sensor assembly represents 1, and the low-level signal output by the capacitive sensor assembly represents 0.

[0363] In step 120, it is determined whether the data is multiple optional data.

[0364] In one possible implementation, the data is a subsequent detection value of the capacitive sensor assembly, and in the case that the detection value is greater than a preset detection value, the subsequent detection value is continuously obtained.

[0365] In another possible implementation, the data is an inclination angle detected by an angle sensor.

[0366] In yet another possible implementation, the data is a vibration amplitude detected by a vibration sensor.

[0367] In step 130, it is determined whether the data satisfies a true milk full condition.

[0368] The true milk full condition indicates that the detection value of the capacitive sensor assembly is reliable, and the liquid surface reaches the milk full position. The true milk full condition not being satisfied indicates that the detection value of the capacitive sensor assembly is unreliable, or the liquid surface does not reach the milk full position, or the liquid surface temporarily exceeds the milk full position due to external interference.

[0369] Specifically, in the case that the data is a subsequent detection value of the capacitive sensor assembly, step 130 includes: in the case that the subsequent detection value continuously rises or remains within a preset time, it is determined that the true milk full condition is satisfied; in the case that the subsequent detection value has a non-continuous rising trend within the preset time, it is determined that the true milk full condition is not satisfied.

[0370] The non-continuous rising trend includes one of a rising and then falling trend or a fluctuation trend. In the fluctuation trend, the detection value repeatedly switches between a rising state and a falling state.

[0371] The preset time ranges from 0.5 s to 3 s. However, the preset time is only used as an example, and the upper limit of the time range and the distance between the milk full position and the milk outlet are related. Because the milk continues to enter the milk storage container during the process of determining whether it is a true milk full condition, the distance between the milk full position and the milk outlet is small, and the upper limit value of the judgment needs to be shortened accordingly. The distance between the milk full position and the milk outlet is large, and the upper limit value of the judgment can be extended accordingly. Therefore, the range of the preset time described above should not be understood as a limitation of the present application.

[0372] Specifically, in the case that the data is an inclination angle detected by an angle sensor, step 130 includes the following steps: determining whether the breast pump is in an inclined state according to the inclination angle; in the case that the breast pump is not in the inclined state, it is determined that the true milk full condition is satisfied; and in the case that the breast pump is in the inclined state, it is determined that the true milk full condition is not satisfied.

[0373] In a possible implementation, a preset angle is set in advance. When the inclination angle is greater than or equal to the preset angle, it is determined that the breast pump is in the inclined state. When the inclination angle is less than the preset angle, it is determined that the breast pump is not in the inclined state.

[0374] The above scheme can eliminate the interference of the liquid surface inclination on the milk full detection of the breast pump.

[0375] Specifically, in the case where the judgment data is the vibration amplitude detected by the vibration sensor, step 130 includes the following steps: determining whether the breast pump is in the shaking state according to the vibration amplitude; in the case where the breast pump is not in the shaking state, determining that the true milk full condition is met; and in the case where the breast pump is in the shaking state, determining that the true milk full condition is not met.

[0376] In a possible implementation, a preset vibration amplitude is set in advance. When the vibration amplitude is greater than or equal to the preset vibration amplitude, it is determined that the breast pump is in the shaking state. When the vibration amplitude is less than the preset vibration amplitude, it is determined that the breast pump is not in the shaking state.

[0377] The above scheme can eliminate the interference of the liquid surface shaking on the milk full detection of the breast pump.

[0378] Step 140: In the case where the judgment data meets the true milk full condition, it is determined that the breast pump is in the true milk full state.

[0379] In the case where it is determined that the breast pump is in the true milk full state, the breast pump can be controlled to perform corresponding operations, thereby realizing a series of functions such as preventing milk overflow and reminding the user.

[0380] Therefore, the method 100 provided in the present application further includes the following step: in the case where it is determined that the breast pump is in the true milk full state, performing a preset operation.

[0381] The preset operation includes any one or more of the following:

[0382] (1) controlling a prompt module in the breast pump to generate milk full prompt information, the prompt module including at least one of a display module, a sound emitting module, and a vibration module.

[0383] For example, the display module includes a display screen on the breast pump. The sound emitting module includes one or more of a buzzer and a loudspeaker on the breast pump. The vibration module includes a massage component on the breast pump, etc.

[0384] (2) sending indication information to the breast pump in communication with the breast pump, the indication information being used to instruct the display module of the breast pump to display the milk full prompt information.

[0385] In a possible implementation manner, the breast pump can be in wired communication with the breast pump through a data line. In another possible implementation manner, the breast pump is in wireless communication with the breast pump through a WIFI module or a Bluetooth module or another wireless communication module.

[0386] The display module of the breast pump includes a display screen of the breast pump.

[0387] (3) controlling the breast pump to stop milk pumping.

[0388] The stopping of the milk pumping can prevent the liquid level from continuously rising to cause the milk to overflow the milk outlet, pollute the milk and the breast pump, or cause damage to the breast pump.

[0389] In a case where it is determined that the breast pump is in the true milk full state, because the structure of the breast pump is fixed, the milk amount of the breast pump can be calculated, and in this case, the method 100 provided in the present application further includes the step of: in a case where it is determined that the breast pump is in the true milk full state, determining the milk amount of the breast pump according to the milk full position and a mapping relationship; wherein the mapping relationship is used to indicate a corresponding relationship between the milk full position and the milk amount.

[0390] The corresponding relationship between the milk full position and the milk amount can be calibrated at the factory and stored in the memory of the breast pump or a server in communication with the breast pump, and the present application does not make any limitation.

[0391] Step 150: in a case where the judgment data does not satisfy the true milk full condition, determining that the breast pump is in a false milk full state.

[0392] In a case where it is determined that the breast pump is in the false milk full state, it indicates that the liquid level does not reach the milk full position, and the milk pumping can be normally performed, or the milk pumping intensity or frequency is temporarily reduced to reduce the milk pumping amount per unit time, and the breast pump is waited to return to the undisturbed state.

[0393] Please refer to FIG. 9, which is a structural schematic diagram of a milk full state judgment device of a breast pump provided in an embodiment of the present application. The device is applied to the breast pump in any of the above embodiments. As shown in FIG. 9, the control device 600 includes a first acquisition unit 610, a second acquisition unit 620, a judgment unit 630, a first determination unit 640, and a second determination unit 650.

[0394] The first acquisition unit 610 is configured to acquire a detection value of the capacitive sensor assembly.

[0395] The second acquisition unit 620 is configured to acquire judgment data in a case where the detection value is greater than a preset detection value.

[0396] The judgment unit 630 is configured to judge whether the judgment data satisfies a true milk full condition.

[0397] The first determination unit 640 is configured to determine that the breast pump is in the true milk full state when the judgment data satisfies the true milk full condition.

[0398] The second determination unit 650 is configured to determine that the breast pump is in the false milk full state when the judgment data does not satisfy the true milk full condition.

[0399] The above units can also perform the remaining steps of the milk full state judgment method of the breast pump in any of the embodiments described in the specification, or the control device is further provided with the remaining units to perform the remaining steps of the milk full state judgment method of the breast pump in any of the embodiments described in the specification, which will not be described here.

[0400] In combination with the structure of any of the above embodiments, the application further provides another milk full state judgment method of a breast pump. Please refer to FIG. 10, which is a flowchart of a milk full state judgment method of a breast pump according to an embodiment of the application. As shown in FIG. 10, the method 200 comprises steps 210 to 250.

[0401] In step 210, detection data of a milk full detection sensor is obtained.

[0402] In one type of milk full detection sensor, the detection data is a detection value, and this type of milk full detection sensor includes a differential capacitive sensor assembly, a pressure sensor, an ultrasonic sensor, and a photoelectric sensor. For example, the differential capacitive sensor assembly outputs a capacitive detection value, the pressure sensor outputs a pressure value, the ultrasonic sensor outputs a distance value, and the photoelectric sensor outputs a distance value.

[0403] In another type of milk full detection sensor, the detection data is a detection level signal, i.e., a high level signal or a low level signal, and this type of milk full detection sensor includes an inductive capacitive sensor assembly and a photoelectric sensor. For example, the inductive capacitive sensor assembly outputs a high level signal when the internal capacitance is greater than a preset capacitance value, and otherwise outputs a low level signal. The photoelectric sensor outputs a high level signal when it receives reflected light or the light intensity of the received reflected light is greater than a preset light intensity, and otherwise outputs a low level signal.

[0404] In step 220, judgment data is obtained when the detection data satisfies a preset condition.

[0405] Specifically, if the milk full detection sensor outputs a detection value, then:

[0406] In one possible implementation, the preset condition is that the detection value is greater than a preset milk full value. Because external interference needs to be excluded to prevent false recognition of milk full, when the detection value detected by the capacitive sensor assembly is greater than the preset milk full value, it is not directly considered that the true milk full position is reached, but further judgment data is obtained to verify whether it is true milk full.

[0407] In another possible implementation, the preset detection value can be less than the preset milk full value.

[0408] The preset milk full value includes one of a preset capacitance detection value, a preset distance detection value, and a preset pressure detection value, which is determined by the type of the milk full detection sensor and is not limited in the application. The specific value of the preset milk full value will be different for different structures of the breast pump and different milk full positions, and the application does not limit this.

[0409] Specifically, if the milk full detection sensor assembly outputs a detection level signal, then:

[0410] The preset condition includes that the detection level signal is a high level signal.

[0411] Further, in step 220, it is determined whether the data is multiple selectable data.

[0412] In one possible implementation, the milk full detection sensor is a differential capacitance sensor assembly, and the detection value is a capacitance detection value. In this case, step 220 includes the step of: continuously acquiring subsequent capacitance detection values when the capacitance detection value is greater than a preset capacitance detection value. In this case, the determination data is the subsequent capacitance detection value.

[0413] In another possible implementation, the detection data is a detection level signal. In this case, step 220 includes the step of: acquiring multiple detection level signals from a first time to a second time when the detection level signal at the first time is a preset level signal; and the second time is after the first time. In this case, the determination data is the multiple detection level signals from the first time to the second time.

[0414] In yet another possible implementation, the detection data is a vibration amplitude detected by a vibration sensor.

[0415] In still another possible implementation, the detection data is an inclination angle detected by an angle sensor.

[0416] Step 230: determining whether the determination data meets a true milk full condition.

[0417] The true milk full condition indicates that the detection value of the capacitance sensor assembly is reliable, and the liquid surface reaches the milk full position. The true milk full condition not being met indicates that the detection value of the capacitance sensor assembly is not reliable, the liquid surface does not reach the milk full position, or the liquid surface temporarily crosses the milk full position due to external interference.

[0418] In a possible implementation, if the judgment data is the subsequent capacitance detection value, the step 130 comprises the following steps: if the subsequent capacitance detection value continuously increases or remains in a preset time, it is judged that the true milk full condition is met; if the subsequent capacitance detection value has a non-continuous increasing trend in the preset time, it is judged that the true milk full condition is not met.

[0419] The non-continuous increasing trend comprises one of a decreasing trend after increasing or a fluctuation trend. In the fluctuation trend, the detection value repeatedly switches between an increasing state and a decreasing state.

[0420] The preset time ranges from 0.5 s to 3 s. However, the preset time is only an example, and the upper limit of the time range and the distance between the milk full position and the milk outlet are related. Because the milk continues to enter the milk storage container during the judgment of whether it is true milk full, if the distance between the milk full position and the milk outlet is small, the upper limit of the judgment needs to be shortened accordingly, and if the distance between the milk full position and the milk outlet is large, the upper limit of the judgment can be extended accordingly. Therefore, the range of the preset time should not be understood as a limitation of the present application.

[0421] The above implementation can effectively exclude the interference of liquid surface shaking and liquid surface tilting on milk full detection. Because when the liquid surface shakes or tilts, the milk volume generally decreases after being greater than the preset milk full value, so it is detected as false milk full by the above detection method.

[0422] In another possible implementation, the judgment data is a plurality of detection level signals from the first moment to the second moment. At this time, the step 230 comprises the following steps: if all the plurality of detection level signals are preset level signals, it is judged that the true milk full condition is met; if at least one of the plurality of detection level signals is not a preset level signal, it is judged that the true milk full condition is not met.

[0423] Preferably, the preset level signal is a high level signal.

[0424] The above implementation can effectively exclude the interference of liquid surface shaking and liquid surface tilting on milk full detection. Because when the liquid surface shakes or tilts, the milk volume generally decreases after being greater than the preset milk full value, so the detection level signal is a low level signal, and it is detected as false milk full by the above detection method.

[0425] In yet another possible implementation, in the case that the judgment data is the inclination angle detected by the angle sensor, the step 230 comprises the following steps: judging whether the breast pump is in an inclined state according to the inclination angle; if the breast pump is not in the inclined state, it is judged that the true milk full condition is met; if the breast pump is in the inclined state, it is judged that the true milk full condition is not met.

[0426] Optionally, a preset angle is set in advance, and when the inclination angle is greater than or equal to the preset angle, it is determined that the breast pump is in the inclined state. When the inclination angle is less than the preset angle, it is determined that the breast pump is not in the inclined state.

[0427] The above scheme can eliminate the interference of the liquid surface inclination on the milk full detection of the breast pump.

[0428] In another possible implementation, in a case where the data is determined to be the vibration amplitude detected by the vibration sensor, the step 230 includes a step of: determining whether the breast pump is in the shaking state according to the vibration amplitude; in a case where the breast pump is not in the shaking state, determining that the true milk full condition is met; and in a case where the breast pump is in the shaking state, determining that the true milk full condition is not met.

[0429] Optionally, a preset vibration amplitude is set in advance, and when the vibration amplitude is greater than or equal to the preset vibration amplitude, it is determined that the breast pump is in the shaking state. When the vibration amplitude is less than the preset vibration amplitude, it is determined that the breast pump is not in the shaking state.

[0430] The above scheme can eliminate the interference of the liquid surface shaking on the milk full detection of the breast pump.

[0431] Step 240: In a case where the data meets the true milk full condition, it is determined that the breast pump is in the true milk full state.

[0432] In a case where it is determined that the breast pump is in the true milk full state, the breast pump can be controlled to perform a corresponding operation, thereby realizing a series of functions such as preventing milk overflow and reminding a user.

[0433] Therefore, the method 200 provided in the present application further includes a step of: in a case where it is determined that the breast pump is in the true milk full state, performing a preset operation.

[0434] The preset operation includes any one or more of the following:

[0435] (1) Controlling a prompt module in the breast pump to generate milk full prompt information, the prompt module including at least one of a display module, a sound emitting module, and a vibration module.

[0436] For example, the display module includes a display screen on the breast pump. The sound emitting module includes one or more of a buzzer and a loudspeaker on the breast pump. The vibration module includes a massage component on the breast pump, etc.

[0437] (2) Sending indication information to the breast pump in communication with the breast pump, the indication information being used to instruct the display module of the breast pump to display the milk full prompt information.

[0438] In a possible implementation manner, the breast pump can be in wired communication with the breast pump through a data line. In another possible implementation manner, the breast pump is in wireless communication with the breast pump through a WIFI module or a Bluetooth module or other wireless communication module.

[0439] The display module of the breast pump includes a display screen of the breast pump.

[0440] (3) controlling the breast pump to stop milk pumping.

[0441] The stopping of the milk pumping can prevent the liquid level from continuously rising to cause the milk to overflow the milk outlet, pollute the milk and the breast pump, or cause damage to the breast pump.

[0442] Further, in the case where it is determined that the breast pump is in the true milk full state, the milk amount of the breast pump can be calculated, and in this case, the method 200 provided in the present application further includes the step of: in the case where it is determined that the breast pump is in the true milk full state, determining the milk amount of the breast pump according to the milk full position and a mapping relationship; wherein the mapping relationship is used to indicate a corresponding relationship between the milk full position and the milk amount.

[0443] The corresponding relationship between the milk full position and the milk amount can be calibrated at the factory and stored in the memory of the breast pump or a server in communication with the breast pump, which is not limited in the present application.

[0444] Step 250: in the case where the data does not satisfy the true milk full condition, determining that the breast pump is in a false milk full state.

[0445] In the case where it is determined that the breast pump is in the false milk full state, it is indicated that the liquid level does not reach the milk full position, and the milk pumping can be normally performed, or the milk pumping intensity or frequency is temporarily reduced to reduce the milk pumping amount per unit time, and the breast pump is waited to return to the undisturbed state.

[0446] The present application also provides another milk full state determination device of a breast pump. The device is applied to the breast pump in any of the above embodiments, and the control device includes a first acquisition unit, a second acquisition unit, a determination unit, a first determination unit, and a second determination unit.

[0447] The first acquisition unit is configured to acquire detection data of a milk full detection sensor.

[0448] The second acquisition unit is configured to acquire determination data in the case where the detection data satisfies a preset condition.

[0449] The determination unit is configured to determine whether the determination data satisfies a true milk full condition.

[0450] The first determination unit is configured to determine that the breast pump is in a true milk full state in the case where the determination data satisfies the true milk full condition.

[0451] The second determining unit is configured to determine that the breast pump is in the false milk full state when the determining data does not satisfy the true milk full condition.

[0452] The unit can also perform the remaining steps of the milk full state determination method of the breast pump in any of the embodiments described in the specification, or the control device is further provided with a remaining unit to perform the remaining steps of the milk full state determination method of the breast pump in any of the embodiments described in the specification, which will not be described here.

[0453] Please refer to FIG. 11, which is a structural schematic diagram of a breast pump provided by an embodiment of the present application. As shown in FIG. 11, the breast pump 700 comprises one or more processors 710 and a memory 720, and FIG. 11 takes one processor 710 as an example.

[0454] In some embodiments, the processor and the memory 720 can be connected through a bus or other means, and FIG. 11 takes the connection through a bus as an example.

[0455] In some embodiments, the processor 710 is configured to acquire detection data of a milk full detection sensor, acquire determining data when the detection data satisfies a preset condition, determine whether the determining data satisfies a true milk full condition, determine that the breast pump is in a true milk full state when the determining data satisfies the true milk full condition, and determine that the breast pump is in a false milk full state when the determining data does not satisfy the true milk full condition. Alternatively, the processor 710 is configured to acquire a detection value of a capacitive sensor assembly, acquire determining data when the detection value is greater than a preset detection value, determine whether the determining data satisfies a true milk full condition, determine that the breast pump is in a true milk full state when the determining data satisfies the true milk full condition, and determine that the breast pump is in a false milk full state when the determining data does not satisfy the true milk full condition.

[0456] In some embodiments, the memory 720 serves as a non-volatile computer readable storage medium, and can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules of the control method of the breast pump in the embodiments of the present application. The processor 710 performs various functional applications and data processing of the breast pump by running the non-volatile software programs, instructions and modules stored in the memory 720, that is, implements the milk full state determination method of the breast pump in the method embodiments.

[0457] In some embodiments, the memory 7320 can include a program storage area and a data storage area, where the program storage area can store an operating system, application programs required by at least one function, and the like, and the data storage area can store data created based on the use of the breast pump, and the like. In addition, the memory 720 can include a high-speed random access memory, and can further include a nonvolatile memory, such as at least one disk memory device, a flash memory device, or other nonvolatile solid-state memory device. In some embodiments, the memory 720 can optionally include a memory disposed remotely with respect to the processor 710, which can be connected to the controller through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0458] In some embodiments, one or more modules are stored in the memory 720, which, when executed by the one or more processors 710, perform the milk full state determination method of the breast pump in any of the above method embodiments, for example, perform the method steps 110 to 150 in FIG. 8 or the method steps 210 to 250 in FIG. 10 described above.

[0459] Referring to FIG. 12, FIG. 12 is a structural block diagram of a computer readable storage medium provided by an embodiment of the present application. The computer readable storage medium 800 stores program code 810 therein, which can be invoked by a processor to perform the milk full state determination method of the breast pump in any of the above method embodiments, for example, perform the method steps 110 to 150 in FIG. 8 or the method steps 210 to 250 in FIG. 10 described above.

[0460] The computer readable storage medium 800 can be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk, or a ROM. Alternatively, the computer readable storage medium includes a non-volatile computer readable medium. The computer readable storage medium 400 has a storage space for program code that performs any of the method steps of the above control method. These program codes can be read from or written to one or more computer program products. The program codes can be compressed in an appropriate form, for example.

[0461] The present application also provides a computer program product, which includes a computer program (also referred to as code or instructions), which, when executed, causes a computer to perform the method in any of the above method embodiments.

[0462] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. The division of the units is merely logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0463] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0464] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of software functional units.

[0465] When the integrated unit is implemented in the form of software functional units and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially, or the part that contributes to the prior art, or all or a part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disk or optical disk, and various media that can store program codes.

[0466] In the related art, an inductive capacitive sensor is used on the breast pump to detect some parameters of the milk storage container of the breast pump. For example, multiple inductive capacitive sensors are used to detect the liquid level of the milk liquid in the milk storage container, so as to calculate the milk liquid volume in the current milk storage container according to the liquid level of the milk liquid.

[0467] Specifically, the inductive capacitive sensor can only output a high level signal and a low level signal, the high level signal reflects that the capacitance change is greater than a preset threshold, and it is considered that the liquid level reaches the liquid level corresponding to the inductive capacitive sensor, and the low level signal reflects that the capacitance change is less than the preset threshold, and it is considered that the liquid level does not reach the liquid level corresponding to the inductive capacitive sensor.

[0468] For example, a first inductive capacitive sensor is arranged at a first height on the container wall of the milk storage container, and a second inductive capacitive sensor is arranged at a second height, if the first inductive capacitive sensor outputs a high level signal, it is considered that the liquid level of the milk storage container has reached the first liquid level corresponding to the first inductive capacitive sensor, and if the detection value of the second inductive capacitive sensor outputs a high level signal, it is considered that the liquid level of the milk storage container has reached the second liquid level corresponding to the second inductive capacitive sensor.

[0469] However, when the milk storage container is hung on the wall, which means that the milk is "stuck" on the container wall due to surface tension, if the milk is "stuck" in the detection area of the inductive capacitive sensor, the inductive capacitive sensor may output a high level signal, resulting in incorrect milk quantity detection.

[0470] For another example, when the liquid level in the milk storage container is inclined, if the milk covers the detection area of the inductive capacitive sensor, the detection value of the inductive capacitive sensor may also output a high level signal, resulting in incorrect milk quantity detection.

[0471] Therefore, the inductive capacitive sensor is easily affected by the wall hanging of the milk, the shaking of the liquid level, the inclination of the liquid level, the factory machine parameter error, the human body contact, the difference of the dielectric constant of the milk of different mothers, or other interference contacts, etc., resulting in poor effect of using the inductive capacitive sensor to detect the milk quantity of the milk storage container.

[0472] Specifically, the conventional inductive capacitive sensor is used to detect self-capacitance, which is the capacitance between the pole piece of the capacitive sensor and the ground. This type of sensor does not require two pole plates, but relies on the capacitance change generated when the target object approaches the sensor for detection.

[0473] As shown in FIGS. 5-6, this embodiment is the basic principle of differential capacitive detection of liquid level. In view of the problems of the inductive capacitive sensor, this embodiment adopts a differential capacitive sensor assembly as a sensor for detecting the state parameters of the milk storage container in the breast pump. The differential capacitive sensor assembly includes a detection electrode assembly, which includes a capacitor composed of two electrodes arranged in parallel and opposite to each other. The differential capacitive sensor assembly is used to detect the mutual capacitance between the two electrodes of the capacitor, and the output result is no longer a high-low level signal, but a capacitance change value between the two electrodes or a digital signal converted from the capacitance change value.

[0474] For the convenience of description, the capacitance formed by two electrodes arranged in parallel and opposite to each other in the differential capacitance sensor assembly is referred to as a parallel capacitance group. In one possible implementation, the parallel capacitance group is a standard parallel-plate capacitor shown in FIG. 6, and the parallel capacitance group in FIG. 6 includes a first electrode 1000 and a second electrode 2000, and the facing planes of the two electrodes are completely aligned. In another possible implementation, the facing planes of the two electrodes of the parallel capacitance group are only partially aligned, and the partial areas of the first electrode and the second electrode are staggered.

[0475] In addition, the differential capacitance sensor assembly in the present application includes, in addition to the parallel capacitance group, a control circuit connected to the parallel capacitance group, as shown in FIG. 5, and the control circuit is used to charge the parallel capacitance group and collect the electric charge on the parallel capacitance group after a preset time, and determine the capacitance value of the parallel capacitance group according to the electric charge change speed and / or the electric charge change amount.

[0476] The control circuit includes a conversion unit, and the conversion unit includes an excitation module, a sampling module, and a conversion module.

[0477] The excitation module generates a charging signal for charging the differential capacitance sensor assembly, and the electric charge on the differential capacitance sensor assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal.

[0478] The conversion module is connected to a processing unit, and the processing unit is used to calculate the state parameter of the milk storage container corresponding to the differential capacitance sensor assembly according to the digital signal.

[0479] Optionally, the conversion unit is a capacitance-to-digital converter, and optionally, the conversion module is an analog-to-digital converter (ADC).

[0480] The conversion unit is further described below, and please refer to FIG. 5, which is a detection principle diagram of the differential capacitance sensor assembly provided in the embodiments of the present application. As shown in FIG. 5, the detection electrode assembly is connected to the conversion unit, and the sampling module in the control circuit in FIG. 5 includes a switched-capacitor circuit and a sample-and-hold circuit.

[0481] The excitation module is used to generate an excitation signal, and the excitation signal is used to charge the parallel capacitance group in the detection electrode assembly. In some cases, the excitation signal is generated by an oscillator in the excitation module. In other cases, the excitation signal is generated by a clock signal received by the excitation module. The present application does not make any limitation.

[0482] The switched-capacitor circuit is used to close the switch at an appropriate time to transfer the electric charge on the parallel capacitance group to the input end of the ADC.

[0483] The sample-and-hold circuit is used to keep the voltage on the parallel capacitor stable before the conversion module converts the voltage, so that the ADC can read a stable voltage value during the conversion.

[0484] The conversion module is used to convert the analog voltage into a digital signal and input the digital signal to the processing unit (not shown in FIG. 5). In some cases, the conversion module also performs digital filtering during the conversion to improve the conversion accuracy.

[0485] The processing unit is used to determine the state parameter of the milk storage container corresponding to the differential capacitor sensor assembly according to the digital signal and a preset mapping relationship.

[0486] The structure of the control circuit is only illustrative. In some embodiments, the control circuit can further include more or fewer components than those shown, or combine some components, or split some components, or different component arrangements. The components shown can be implemented in hardware, software, or a combination of software and hardware. For example, part or all of the functions of the conversion unit can be integrated into the processing unit to save space, or the processing unit can be added to the conversion unit, which is not limited in the present application.

[0487] An embodiment of the differential capacitor sensor assembly for detecting the liquid level will be described below.

[0488] Referring to FIG. 6, FIG. 6 is a schematic diagram of the liquid level detection principle of the differential capacitor sensor assembly according to an embodiment of the present application. The control circuit is not shown in FIG. 6.

[0489] As shown in FIG. 6, FIG. 6 includes straight electric field lines that point from the facing plane of the first electrode 1000 to the facing plane of the second electrode 2000, and also includes curved electric field lines that point from the side of the first electrode 1000 to the side of the second electrode 2000. The curved electric field lines pass through the liquid storage space of the container. Because the dielectric constant of the liquid is much greater than that of the air, the dielectric constant between the two electrodes gradually increases as the liquid level rises, so that the capacitance value of the parallel capacitor increases.

[0490] It can be understood that only part of the electric field lines of the parallel capacitor is shown in FIG. 6.

[0491] The capacitance change of the differential capacitor sensor assembly in FIG. 6 is proportional to the change of the liquid level, so after the capacitance change is converted into a specific digital signal change, the specific change amount of the liquid level can be calculated according to the digital signal change. The capacitance change of the inductive capacitor sensor is not proportional to the change of the liquid level, and the processing unit can only determine whether the liquid level reaches the corresponding height of the inductive capacitor sensor through the high level signal or the low level signal output by the inductive capacitor sensor.

[0492] And compared with the prior art, one inductive capacitive sensor corresponds to one liquid level measurement mode, the differential capacitive sensor assembly in FIG. 6 is arranged along the rising direction of the liquid level of the container, so that all the liquid level changes in the process of the container from empty milk to full milk in FIG. 6 can be measured by one differential capacitive sensor assembly, realizing that one sensor measures all the liquid levels.

[0493] Optionally, the first electrode and the second electrode are also provided with a shielding layer 3000 away from one side of the container, so as to reduce external interference. It is defined that the first electrode and the second electrode detect the liquid level of the container through the electric field lines of the first side, and the above case can also be understood as that a sensor setting layer is arranged near the second side opposite to the first side, which blocks the electric field lines of the second side, so as to reduce external interference.

[0494] In FIG. 6, d1 is the distance between the two opposite planes of the first electrode and the second electrode, and d2 is the distance between the first electrode and the second electrode and the liquid storage space of the container. The distance d1 between the two opposite planes of the first electrode and the second electrode of the parallel capacitive group is called the pitch of the differential capacitive sensor assembly, and the pitch d1 of the parallel capacitive group is proportional to the detection distance. In order to ensure that the differential capacitive sensor assembly can detect the liquid level change of the liquid storage space, it is necessary to ensure that d1 is greater than or equal to d2.

[0495] Exemplarily, it is assumed that the maximum detection distance of the parallel capacitive group in FIG. 6 is d2. When the container is away from the differential capacitive sensor assembly, so that the distance between the container and the differential capacitive sensor assembly is greater than d2, the pitch d1 can be increased, so as to increase the detection range of the parallel capacitive group.

[0496] However, the present application is not limited to the embodiment shown in FIG. 6.

[0497] In another possible embodiment, the electric field lines between the opposite plane of the first electrode and the opposite plane of the second electrode in the differential capacitive sensor assembly pass through at least part of the milk storage space in the milk storage container, and the liquid level is detected through the electric field lines between the opposite planes.

[0498] In still some possible embodiments, the present application can also be provided with multiple differential capacitive sensor assemblies to detect the liquid level change. In one possible implementation, each differential capacitive sensor assembly is used to measure different ranges of liquid levels, so as to improve the measurement accuracy. In another possible implementation, each differential capacitive sensor assembly is used to detect the same range of liquid levels, and the validity of the measurement result is ensured by processing the detection results.

[0499] The state parameters of the milk storage container in the breast pump are measured by the differential capacitive sensor assembly in the present application, and the state parameters of the milk storage container are described below.

[0500] The state parameters of the milk storage container include at least one of the milk amount in the milk storage container, the liquid level in the milk storage container, the empty milk state, the full milk state, and the milk detection value per unit height.

[0501] The milk amount in the milk storage space and the liquid level in the milk storage space are associated parameters, because in the case of a fixed milk storage container structure, the liquid level and the milk amount can establish a clear correspondence relationship. When determining the milk amount based on the detection value of the differential capacitive sensor assembly, the milk amount can be directly determined based on the mapping relationship between the detection value and the milk amount, or the liquid level can be determined based on the detection value first, and then the milk amount can be determined based on the liquid level. The present application does not make any limitation.

[0502] The milk amount in the milk storage space can be represented by any one or more of a milk amount proportion value, a milk amount volume value, a milk amount weight value, and a milk amount degree value, or other forms. The milk amount proportion value is, for example, 50%, representing that the current milk amount is 50% of the maximum storage capacity of the milk storage container. The milk amount volume value is, for example, 50 mL. The milk amount weight value is, for example, 10 g. The milk amount degree value is, for example, empty, low, medium, high, full, etc. The above examples are only for illustration and do not constitute any limitation on the representation of the milk amount in the milk storage space.

[0503] The liquid level in the milk storage space can be represented by any one or more of a liquid level proportion value, a liquid level specific value, and a liquid level degree value, or other forms. The liquid level proportion value is, for example, 50%. The liquid level specific value is, for example, 5 cm. The liquid level degree value is, for example, empty, low, medium, high, full, etc. The above examples are only for illustration and do not constitute any limitation on the representation of the milk amount in the milk storage space.

[0504] The empty milk state in the state parameters of the milk storage container includes an empty milk condition and a non-empty milk condition. The empty milk condition refers to that the milk storage container does not store milk or the stored milk amount does not reach the empty milk preset value. The non-empty milk condition refers to that the milk storage container stores milk or the stored milk amount reaches the empty milk preset value. The specific value of the empty milk preset value can be set as needed, and the present application does not make any limitation. The detection of the empty milk state of the milk storage container is beneficial to the monitoring of the state change from empty milk to milk, facilitating the breast pump to make a prompt or intelligent control based on the state change. The detection of the empty milk state of the milk storage container is also beneficial to identifying the basic interference caused by the capacitance difference due to the process errors of the out-of-factory state of the breast pump due to manufacturing and assembly, thereby improving the milk amount detection or full milk detection accuracy.

[0505] The milk full state in the state parameter of the milk storage container includes a milk full condition and a non-milk full condition. The milk full condition refers to that the milk amount stored in the milk storage container reaches a milk full preset value. The milk full preset value can be a condition that the milk storage container is completely filled, or a preset threshold close to the milk full state, and is more preferably a certain distance from the full milk to reserve the milk overflow phenomenon caused by milk inertia or other reasonable threshold close to the milk full. The non-milk full condition refers to that the milk amount stored in the milk storage container does not reach the milk full preset value. The specific value of the milk full preset value can be set as needed, and the present application does not make any limitation.

[0506] The milk state in the state parameter of the milk storage container includes a milk condition and a non-milk condition. Alternatively, the milk amount reaching a milk preset value is the milk condition, and the milk amount not reaching the milk preset value is the non-milk condition. The milk preset value can be located between the empty milk preset value and the milk full preset value, and is used to accurately determine whether the milk storage container stores milk.

[0507] The unit height milk detection value in the state parameter of the milk storage container can be expressed as the detection value of the differential capacitive sensor assembly as the reference sensor, and is used to quantify the interference received by the differential capacitive sensor assembly as the working sensor in the milk storage container, such as the interference caused by the different dielectric constants of milk of different mothers, human touch interference, basic interference caused by the capacitive difference of the breast pump due to the process error of the factory state of manufacturing and assembly, temperature change interference, and the like. Details will be described in the subsequent part of the description, and will not be described here.

[0508] The empty milk state is detected, and the critical state of the mother with milk discharge can be accurately measured, thereby facilitating the intelligent breast pumping of the breast pump.

[0509] The milk amount in the milk storage container and the liquid level in the milk storage container are detected, so that the user can know whether the stored milk amount is sufficient.

[0510] The milk full state is detected, and the breast pumping can be stopped in time to prevent the milk storage container from overflowing.

[0511] The unit height milk detection value is detected, which can reduce or eliminate the influence of different dielectric constants of milk of different mothers, human touch interference, process error of the breast pump due to manufacturing and assembly, and the like, on the liquid level or milk amount detection, and improve the liquid level or milk amount detection accuracy.

[0512] Alternatively, the working sensor is a differential capacitive sensor assembly for detecting the state parameter of any other milk storage container.

[0513] It is worth mentioning that the inductive capacitive sensor in the background art can only output 0, 1 signal, so the inductive capacitive sensor cannot be used to detect the unit height milk detection value.

[0514] Further, in order to detect the state parameter change of the milk storage container, the electric field lines of the differential capacitive sensor assembly usually need to pass through at least part of the milk storage space of the milk storage container. More specifically, in order to ensure that the differential capacitive sensor assembly can detect the state parameter change of the milk storage container, the distance between the two electrodes of the parallel capacitor group is greater than the distance between the differential capacitive sensor assembly and the inner side of the milk storage container shell.

[0515] As another exception, the differential capacitive sensor assembly can not measure the milk storage container, but determine the state parameter of the milk storage container by measuring other components, such as whether there is milk flowing into the breast shield 10 in the mounting hole 32 to determine the empty milk state of the milk storage container in subsequent embodiments, which will be described in subsequent parts of the specification, and will not be repeated here.

[0516] The dielectric constant of the liquid is usually much larger than that of the air, for example, the dielectric constant of the air is close to 1, the dielectric constant of water is generally 80-81, and the composition of milk as a complex biological liquid mainly includes water, fat, protein, sugar, etc. The dielectric properties of these components are different, but the dielectric constant of milk is much larger than that of air, so when the milk storage space is empty, the dielectric constant ε r in the parallel plate capacitor formula is small, and when the milk storage space stores milk, the dielectric constant ε r in the parallel plate capacitor formula increases, resulting in a change in the capacitance of the parallel capacitor group in the differential capacitive sensor assembly.

[0517] The present application provides a breast pump, which comprises a milk storage container for storing milk and a differential capacitive sensor assembly for detecting the state parameter of the milk storage container. The milk storage container comprises a milk storage container shell, which comprises an inner side in contact with the milk and an outer side not in contact with the milk.

[0518] The differential capacitive sensor assembly comprises a detection electrode assembly arranged on or near the outer side, wherein the outer side is used to indicate that the differential capacitive sensor assembly is not located inside the milk storage container.

[0519] The specific structure of different types of breast pumps will be introduced below, and how to set the differential capacitive sensor assembly on the breast pump of this structure to detect the state parameter of different milk storage containers will be explained.

[0520] The first type of breast pump will be introduced below.

[0521] As shown in FIGS. 1-3, another embodiment of the present application is provided, wherein FIG. 1 is a first perspective view of a first type of breast pump. FIG. 2 is a first exploded view of the first type of breast pump. FIG. 3 is a second exploded view of the first type of breast pump.

[0522] As shown in FIGS. 1-3, the breast pump 1 comprises a breast shield 10, a milk storage container 20, and a main machine 30.

[0523] The breast shield 10 is used to cover the human breast and fit the breast. The breast shield 10 is a flange shaped like a horn for fitting the breast. The milk storage container 20 comprises a nipple receiving portion 22 for receiving the nipple.

[0524] The milk storage container 20 is used to receive and store the breast milk collected by the breast shield 10. The milk storage container 20 is in communication with the breast shield 10.

[0525] Optionally, the milk storage container 20 can be in the form of a milk cover, a milk bowl, a milk bottle, etc., which is not limited in the present application.

[0526] The main machine 30 is further provided with a negative pressure mechanism, which can directly or indirectly apply negative pressure to the breast shield 10 to suck the breast milk into the milk storage container 20.

[0527] The negative pressure mechanism includes but is not limited to a piezoelectric pump, a diaphragm pump, a hydraulic pump, a mechanical pump, etc.

[0528] Optionally, the main machine 30 can further comprise one or more of an energy supply module, a negative pressure gas circuit, a control circuit board, a solenoid valve, etc.

[0529] Specifically, the energy supply module can be a storage battery, a dry battery, or can be directly connected to an external power supply through a power cord.

[0530] The main machine 30 is further provided with a mounting hole 32. The breast shield 10 is arranged in the main machine through the mounting hole 32 and is in liquid communication with the milk storage container 20. The breast milk sucked by the breast shield 10 flows into the milk storage container 20 after passing through the one-way valve assembly 24.

[0531] The milk storage container 20 comprises a milk storage container shell 21, a nipple passage 22, a negative pressure chamber 23, a one-way valve assembly 24, a diaphragm cover 25, and an air hole 26.

[0532] The milk storage container shell 21 comprises a first shell 211 and a second shell 212. The second shell 212 is attached to or close to the main machine 30. The first shell 211 can be integrally formed with the second shell 212 or detachably mounted with the second shell 212. The mounting edges of the first shell 211 and the second shell 212 are provided with sealing rings or other sealing mechanisms to ensure that the milk liquid does not leak from the mounting edges.

[0533] The negative pressure cabin 23 comprises a diaphragm (not shown in the figure), and a diaphragm cover 25 is fixedly installed on the negative pressure cabin 23 and seals the diaphragm. The diaphragm cover 25 further has an air hole 26, and the main machine 30 is further provided with a negative pressure socket 38 which is inserted into the air hole 26, so as to indirectly apply negative pressure to the negative pressure cabin 23 through the diaphragm, so that the user produces milk and the milk is collected by the breast shield 10.

[0534] The milk collected by the breast shield 10 enters the milk storage space through the one-way valve assembly 24. The breast pump 1 works in a cycle of milk collection and air intake. When the breast pump 1 works for milk collection, the valve of the one-way valve in the one-way valve assembly 24 is closed, and when the breast pump 1 works for air intake, the valve of the one-way valve in the one-way valve assembly 24 is opened.

[0535] Optionally, the part of the main machine 30 which is close to and / or attached to the milk storage container is the main machine shell 31; preferably, the differential capacitive sensor assembly is arranged inside the main machine shell to provide better protection for the sensor, wherein the parallel capacitor group is fixedly arranged on the side of the main machine shell 31 to be as close as possible to one side of the milk storage container, so as to minimize the distance between the parallel capacitor group and the detection liquid surface.

[0536] Please refer to FIG. 13, which is a schematic diagram of the main machine of the first type of breast pump after the shell is hidden.

[0537] Optionally, the main machine 30 further comprises a component arrangement layer 36 and a sensor arrangement layer 37, and the sensor arrangement layer 37 is arranged between the component arrangement layer 36 and the main machine shell 31.

[0538] The component arrangement layer 36 is used to arrange the remaining electronic components in the main machine 30 except for the differential capacitive sensor assembly, such as the negative pressure pump, the processing unit, etc. In some cases, the control circuit in the differential capacitive sensor assembly is arranged in the component arrangement layer 36, and the parallel capacitor group is arranged in the sensor arrangement layer 37 and connected to the control circuit in the component arrangement layer 36 through wires.

[0539] Optionally, the sensor arrangement layer 37 has an electric shielding effect, so that the sensor arrangement layer 37 can shield the influence of the electronic components on the differential capacitive sensor assembly on the main machine, and improve the detection effect of the differential capacitive sensor assembly.

[0540] In some cases, the sensor arrangement layer 37 is composed of one or more metal materials such as iron, copper, aluminum, silver, etc. to have an electric shielding effect. In other cases, the inner side of the sensor arrangement layer 37 close to the component arrangement layer 36 is coated with a conductive coating to have an electric shielding effect. However, the present application is not limited thereto, and the above cases are only used for illustration.

[0541] In some embodiments, the host 30 comprises a main body 33 extending in the direction of the rising milk liquid level and a base 34, the milk storage container 20 is installed above the base 34, the milk storage container comprises a sidewall (not shown in the figure) extending in the direction of the rising milk liquid level and a bottom wall (not shown in the figure) connecting the sidewall, the main body 33 contacts or is close to the sidewall, and the base 34 contacts or is close to the bottom wall.

[0542] In other embodiments, the host 30 comprises a main body 33 extending in the direction of the rising milk liquid level and a top seat 35, the milk storage container 20 is installed below the top seat 35 (see FIG. 21), the milk storage container 20 comprises a sidewall (not shown in the figure) extending in the direction of the rising milk liquid level and a top wall (not shown in the figure) connecting the sidewall; the main body 33 contacts or is close to the sidewall, and the top seat 35 contacts or is close to the top wall.

[0543] Optionally, when the host 30 comprises the base 34, at least one of the first shell 211 or the second shell 212 is present to fit the base 34 in the host 30, and the parallel capacitor group is arranged in the shell of the milk storage container 20 close to the base 34. Optionally, when the host 30 comprises the top seat 35, at least one of the first shell 211 or the second shell 212 fits the top seat 35 in the host 30, and the parallel capacitor group is arranged in the shell of the milk storage container 20 close to the top seat 35.

[0544] Optionally, when the breast pump 1 comprises the base 34, the sensor arrangement layer 37 extends from the main body 33 to the base 34. Optionally, when the breast pump 1 comprises the top seat 35, the sensor arrangement layer 37 extends from the main body 33 to the top seat 35.

[0545] Optionally, when the breast pump 1 comprises the base 34, the host shell 31 extends from the main body 33 to the base 34. Optionally, when the breast pump 1 comprises the top seat 35, the host shell 31 extends from the main body 33 to the top seat 35.

[0546] The optional arrangement area of the differential capacitor sensor assembly is introduced below. The following optional arrangement areas do not limit the function of the differential capacitor sensor assembly, for example, the differential capacitor sensor assembly for detecting the milk volume in the milk storage container or the liquid level in the milk storage container or the empty milk state or the full milk state or the unit height milk detection value can be arranged in the following optional arrangement areas.

[0547] In some embodiments, the differential capacitor sensor assembly is arranged on the outer side of the milk storage container shell that does not contact the milk liquid. In other embodiments, the differential capacitor sensor assembly is arranged close to the outer side.

[0548] As an example, in the first type of breast pump 1, the area where the differential capacitor sensor assembly can be arranged includes but is not limited to:

[0549] 1. The second shell 212 is not in contact with the outer side of the milk liquid.

[0550] 2. The first shell 211 is not in contact with the outer side of the milk liquid.

[0551] 3. The main shell 31 in the main machine 30 is close to the outer side of the milk storage container 20 or away from the inner side of the milk storage container 20.

[0552] 4. The sensor setting layer 37 is close to the outer side of the milk storage container 20 or away from the inner side of the milk storage container 20. Preferably, if the sensor setting layer 37 has an electric shielding effect, it is set close to the outer side of the milk storage container 20.

[0553] It can be understood that when the structure of the breast pump changes, the optional setting area will also change accordingly, and the above-mentioned optional setting area should not be understood as a limitation of the embodiments of the present application.

[0554] In some cases, two or more parallel capacitor groups are arranged in different setting areas. For example, a first parallel capacitor group for detecting the liquid level is arranged on the outer side of the second shell 212 not in contact with the milk liquid, and a second parallel capacitor group for detecting the liquid level is arranged on the outer side of the first shell 211 not in contact with the milk liquid. In other cases, two or more parallel capacitor groups are arranged in the same setting area, thereby facilitating wiring and layout.

[0555] In some cases, the differential capacitor sensor assembly further comprises a wireless communication module, and the differential capacitor sensor assembly transmits the detection data to the processing unit remotely through the wireless communication module. In other cases, the differential capacitor sensor assembly is connected to the processing unit through a connecting line, and the transmission of the detection data is performed through the connecting line.

[0556] Before the scheme of the present application is specifically described through the embodiments, it needs to be explained that only the specific setting mode of the parallel capacitor group in the differential capacitor sensor assembly is shown in all subsequent drawings of the present application, and the control circuit is not shown. But this does not mean that the differential capacitor sensor assembly does not need a control circuit, nor does it mean that the control circuit is not set in the drawings of the present application. The drawings of the present application are only examples and should not constitute any limitation on the embodiments of the present application.

[0557] And the description of the setting mode and the setting position of the differential capacitor sensor assembly set on the top of the milk storage container or the bottom of the milk storage container in the subsequent content of the present application is all for the parallel capacitor group in the differential capacitor sensor assembly, and should not be understood as a limitation on the setting position of the control circuit.

[0558] It should be noted that when the bottom and the top of the milk storage container are described in the subsequent embodiments of the present application, the bottom and the top are described in the direction of the rising of the milk surface, and the milk stored in the milk storage container rises from the bottom to the top in the direction of the rising of the milk surface.

[0559] The following describes the arrangement of the differential capacitive sensor assembly when measuring the liquid level or the milk volume.

[0560] When the differential capacitive sensor assembly is used to measure the liquid level or the milk volume, it is arranged in the setting area in the direction of the rising of the milk surface in the milk storage container.

[0561] For example, the parallel capacitive group in the differential capacitive sensor assembly includes a first electrode and a second electrode, the first electrode includes a first end and a second end, the second end is below the first end in the direction of the rising of the milk surface, and the second electrode includes a third end and a fourth end, the fourth end is below the third end in the direction of the rising of the milk surface.

[0562] The arrangement of the differential capacitive sensor assembly in the direction of the rising of the milk surface in the milk storage container means that the direction in which the second end points to the first end is the same as the direction of the rising of the milk surface or the included angle between the direction in which the second end points to the first end and the direction of the rising of the milk surface is less than a preset angle, and the direction in which the fourth end points to the third end is the same as the direction of the rising of the milk surface or the included angle between the direction in which the fourth end points to the third end and the direction of the rising of the milk surface is less than a preset angle.

[0563] It should be noted that the value of the preset angle is affected by many factors such as the specification of the capacitor and the structure of the breast pump, and needs to be selected according to the actual situation, but in general, the included angle between the direction in which the lower end points to the upper end and the direction of the rising of the milk surface is less than 90°.

[0564] In one possible implementation, the first electrode and the second electrode are in a straight line shape, thereby facilitating production and manufacturing. In another possible implementation, the first electrode and the second electrode are in a curved shape or even an irregular shape, thereby adapting to more complex installation spaces. The present application does not make any limitation.

[0565] In addition, the range of the liquid level that can be measured by the differential capacitive sensor assembly is determined by the lowest point and the highest point of the first electrode and the second electrode in the direction of the rising of the milk surface. For example, if the milk in the milk storage container rises to 10 cm in the direction of the rising of the milk surface, and the lowest point of the first electrode and the second electrode is set at 1 cm, and the highest point of the first electrode and the second electrode is set at 8 cm, then the range of the liquid level that can be detected by the differential capacitive sensor assembly is approximately 1 cm to 8 cm.

[0566] Therefore, when it is required to increase the range of the differential capacitive sensor assembly, the length of the differential capacitive sensor assembly in the direction of the milk level rising can be increased. For example, when it is desired to measure the complete range of the liquid level, the lowest point of the first electrode and the second electrode can be arranged at or below the bottom of the milk storage space, and the highest point of the first electrode and the second electrode can be arranged at or above the top of the milk storage space in the direction of the milk level rising.

[0567] Optionally, the direction of the milk level rising is the direction of the milk level rising when the breast pump is correctly worn on the breast of the user. Optionally, the direction of the milk level rising is the direction of the milk level rising when the breast pump is placed stably.

[0568] The arrangement of the differential capacitive sensor assembly for measuring the liquid level or the milk amount will be described in detail below with reference to the embodiments.

[0569] In some embodiments, the differential capacitive sensor assembly for measuring the liquid level or the milk amount is arranged in the main machine housing 31 of the main machine 30. Please refer to FIGS. 14-18, which are schematic diagrams of different arrangements of the differential capacitive sensor assembly for measuring the liquid level or the milk amount on the main machine housing according to the embodiments of the present application.

[0570] The direction of the milk level rising when the breast pump is correctly worn is schematically shown by the dotted line in FIGS. 14-18 and subsequent drawings, i.e., the X direction in the drawings.

[0571] The differential capacitive sensor assembly in FIGS. 14-18 can be understood as being arranged on the outer side of the main machine housing 31, or as being arranged on the inner side of the main machine housing 31.

[0572] In one possible implementation, as shown in FIG. 14, the first electrode 411A and the second electrode 412A of the differential capacitive sensor assembly 41A are arranged on the two sides of the mounting hole 32, respectively, and the arrangement direction of the differential capacitive sensor assembly 41A is the same as the direction of the milk level rising.

[0573] In another possible implementation, as shown in FIG. 15, the first electrode 411B and the second electrode 412B of the differential capacitive sensor assembly 41B are arranged on the two sides of the mounting hole 32, respectively, and the arrangement direction of the differential capacitive sensor assembly 41B forms a certain angle with the direction of the milk level rising. Optionally, the first electrode and the second electrode can also extend in a curved line.

[0574] In yet another possible implementation, as shown in FIG. 16, the first electrode 411C and the second electrode 412C of the differential capacitive sensor assembly 41C are arranged on the same side of the mounting hole 32.

[0575] In another possible implementation, as shown in FIG. 17, the differential capacitive sensor assembly includes differential capacitive sensor assembly 41D and differential capacitive sensor assembly 41E, so that the detection value of differential capacitive sensor assembly 41D and the detection value of differential capacitive sensor assembly 41E can be obtained respectively, and the measurement accuracy can be improved by averaging, etc., and when one differential capacitive sensor assembly fails, the other can still work normally, improving the durability of the breast pump.

[0576] In another possible implementation, as shown in FIG. 18, the differential capacitive sensor assembly includes differential capacitive sensor assembly 41F and differential capacitive sensor assembly 41G, which are respectively used to detect different ranges of liquid level. For example, differential capacitive sensor assembly 41G is used to detect the liquid level in the range of 0-5 cm, and differential capacitive sensor assembly 41F is used to detect the liquid level in the range of 5-10 cm. Each differential capacitive sensor assembly is responsible for a different range of liquid level detection, which can improve the detection accuracy of the liquid level.

[0577] It can be understood that the arrangement modes in FIGS. 14-18 are not limited to the main machine shell 31, but can also be applied to the remaining arrangement areas, such as the outer side of the first shell 211, the outer side of the second shell 212, or the sensor arrangement layer 37.

[0578] In other embodiments, the differential capacitive sensor assembly for measuring the liquid level or milk volume is arranged in the sensor arrangement layer 37 of the main machine 30. Please refer to FIGS. 19-21, which are the first to third arrangement diagrams of the differential capacitive sensor assembly in the sensor arrangement layer according to the embodiments of the present application.

[0579] As shown in FIGS. 19-21, the differential capacitive sensor assembly 41 for measuring the liquid level or milk volume includes electrodes 411 and 412, and is arranged in the outer side of the sensor arrangement layer 37 of the main machine 30 away from the component arrangement layer 36 and along the rising direction X of the milk liquid level.

[0580] It should be noted that more differential capacitive sensor assemblies can be arranged in FIGS. 19-21 to detect more ranges of liquid level or milk volume measurement, or the length of the differential capacitive sensor assembly 41 in the direction of the milk liquid can be increased to increase the range of liquid level or milk volume measurement. For example, the differential capacitive sensor assembly 41 can extend in a curved form like the sensor arrangement layer 37, thereby increasing the range of liquid level or milk volume measurement. FIGS. 19-21 only show the arrangement modes and should not be understood as any limitation on the embodiments of the present application.

[0581] The differential capacitance sensor assembly shown in any of the implementation manners of FIGS. 19-21 can measure the change of the liquid level according to the change of the capacitance value, so when the milk wall-hanging phenomenon occurs, compared with the capacitance change caused by the overall liquid level rise of the differential capacitance sensor assembly, the influence of the milk wall-hanging phenomenon on the capacitance value change of the differential capacitance sensor assembly is small, so the differential capacitance sensor assembly will not incorrectly determine the position of the wall-hanging milk as the current liquid level as the inductive capacitance sensor, because it measures the total amount of the capacitance value corresponding to the milk in the entire measurement range, thereby solving the technical problem of detection error caused by the milk wall-hanging in the prior art.

[0582] The following describes the setting manner of the differential capacitance sensor assembly for measuring the empty milk state.

[0583] In some embodiments, the differential capacitance sensor assembly for measuring the empty milk state is arranged in the setting area close to the bottom of the milk storage container 20, so as to determine whether the milk storage container 20 is in the empty milk state or the non-empty milk state by detecting whether there is milk at the bottom of the milk storage container 20. In another embodiment, the differential capacitance sensor assembly for measuring the empty milk state is arranged in the setting area close to the mounting hole 32, because the breast shield 10 is arranged in the main machine through the mounting hole 32, so the inside of the mounting hole 32 is the inside of the breast shield 10, and thus whether the milk storage container 20 is in the empty milk state or the non-empty milk state can be determined by judging whether the milk flows through the breast shield 10.

[0584] Preferably, if the milk in the breast pump flows into the milk storage container through the milk inlet, the differential capacitance sensor assembly for measuring the empty milk state is at least partially arranged below the milk inlet in the direction in which the milk level rises, because the position below the milk inlet is the fastest position to detect whether the milk enters the milk storage container, and thus the at least partial arrangement below the milk inlet can detect whether the milk storage container changes from the empty milk state to the non-empty milk state the fastest. In some cases, if the breast pump has a one-way valve, the milk inlet can be the valve of the one-way valve.

[0585] The following will describe the setting manner of the differential capacitance sensor assembly for measuring the empty milk state in combination with embodiments.

[0586] In some embodiments, the differential capacitance sensor assembly for measuring the empty milk state is arranged in the sensor setting layer 37 of the breast pump 1.

[0587] In a possible implementation manner, please refer to FIG. 20, which includes the differential capacitance sensor assembly 42B for measuring the empty milk state, and the differential capacitance sensor assembly 42B includes first electrodes 421B and 422B.

[0588] In one description, the differential capacitive sensor assembly 42B is arranged on the main body 33 of the main machine 30 at a position close to the bottom of the milk storage container 20, specifically, in the sensor arrangement layer 37 in the main body 33 at a position close to the bottom of the milk storage container 20, for detecting whether there is milk at the bottom of the milk storage container 20, so as to determine whether the milk storage container 20 is empty or not. In another description, the differential capacitive sensor assembly 42B is arranged in the sensor arrangement layer 37 at a side of the mounting hole 32 close to the bottom of the milk storage container 20.

[0589] In another possible implementation, please refer to FIG. 19 and FIG. 21, which include a differential capacitive sensor assembly 42A for measuring the empty milk state, and the differential capacitive sensor assembly 42A includes first electrodes 421A and 422A. The differential capacitive sensor assembly 42A is arranged in the base 34 of the main machine 30. Specifically, in the sensor arrangement layer 37 in the base 34, for detecting whether there is milk at the bottom of the milk storage container 20, so as to determine whether the milk storage container 20 is empty or not. Preferably, 42A is arranged below the position corresponding to the one-way valve, so that as soon as milk flows out of the one-way valve, 42A can immediately detect the situation of milk flowing out, so as to immediately feed a signal to the control circuit, to facilitate subsequent mode switching or starting of the negative pressure system and other control operations.

[0590] In yet another possible implementation, please refer to FIG. 22, which is a supplementary schematic view of the differential capacitive sensor assembly for measuring the empty milk state provided by the embodiments of the present application. As shown in FIG. 22, FIG. 22 includes a differential capacitive sensor assembly 53 for measuring the empty milk state, and the differential capacitive sensor assembly 53 includes an electrode 531 and an electrode 532. The differential capacitive sensor assembly 53 is arranged in the main body 33 of the main machine 30 at a position close to the mounting hole 32. Specifically, in the sensor arrangement layer 37 in the main body 33 at a position close to the mounting hole 32, for detecting whether milk flows into the milk storage container 20, so as to determine whether the milk storage container 20 is empty or not.

[0591] It should be noted that the differential capacitive sensor assemblies in the above-mentioned figures are all arranged in the sensor arrangement layer 37, but this should not be understood as a limitation of the present application, in other embodiments, the differential capacitive sensor assemblies can also be arranged in the remaining arrangement areas in the same or similar manner.

[0592] The differential capacitive sensor assembly is used to detect the empty milk state of the milk storage container, and no contact with milk is required during the detection process, which is highly practical.

[0593] The arrangement of the differential capacitive sensor assembly for measuring the full milk state will be introduced below.

[0594] In some embodiments, the differential capacitance sensor assembly for measuring the milk full state is arranged near the top of the milk storage container 20 in the arrangement area, so as to determine whether the milk storage container 20 is in the milk full state or not by detecting whether there is milk liquid on the top of the milk storage container 20. It should be noted that the milk full state described herein can be a state in which the milk liquid completely fills the container, but more preferably is a state in which the milk liquid does not reach the completely full state but is close to a preset position close to the milk full state, so as to prevent the problem of milk overflow caused by the inertia of the milk liquid.

[0595] The arrangement of the differential capacitance sensor assembly for measuring the milk full state will be described in detail below with reference to embodiments.

[0596] In some embodiments, the differential capacitance sensor assembly for measuring the milk full state is arranged in the sensor arrangement layer 37 of the breast pump 1.

[0597] In one possible implementation, please refer to FIG. 19 and FIG. 20, which include the differential capacitance sensor assembly 43 for measuring the milk full state, the differential capacitance sensor assembly 43 includes the electrode 431 and the electrode 432.

[0598] In one description, the differential capacitance sensor assembly 43 is arranged on the main body 33 of the main machine 30 near the top of the milk storage container 20. Specifically, the differential capacitance sensor assembly 43 is arranged in the sensor arrangement layer 37 near the top of the milk storage container 20 in the main body 33, so as to detect whether there is milk liquid on the top of the milk storage container 20 and determine whether the milk storage container 20 is in the milk full state or not. In another description, the differential capacitance sensor assembly 43 is arranged in the sensor arrangement layer 37 on one side of the mounting hole 32 near the top of the milk storage container 20.

[0599] In another possible implementation, please refer to FIG. 21, which includes the differential capacitance sensor assembly 44 for measuring the milk full state, the differential capacitance sensor assembly 44 includes the electrode 441 and the electrode 442. The differential capacitance sensor assembly 44 is arranged in the top seat 35 of the main machine 30, so as to detect whether there is milk liquid on the top of the milk storage container 20 and determine whether the milk storage container 20 is in the milk full state or not.

[0600] In some cases, as shown in FIG. 21, the differential capacitance sensor assembly 44 is arranged on the upper side of the sensor arrangement layer 37 in the top seat 35. In other cases, the differential capacitance sensor assembly 44 is arranged on the lower side of the sensor arrangement layer 37 in the top seat 35. The actual arrangement can be selected as needed, and the present application does not make any limitation.

[0601] It should be noted that the differential capacitance sensor assemblies in the above-mentioned figures are all arranged in the sensor arrangement layer 37, but this should not be understood as a limitation of the present application, and in other embodiments, the differential capacitance sensor assemblies can also be arranged in the remaining arrangement regions in the same or similar manner.

[0602] The milk full state of the milk storage container is detected by the differential capacitance sensor assembly, which is not easily affected by milk wall hanging, liquid level fluctuation and the like, and has high detection accuracy.

[0603] The arrangement of the differential capacitance sensor assembly for measuring the unit height milk detection value will be introduced below.

[0604] As an example, the capacitance value of the capacitance sensor is proportional to the dielectric constant of the medium, and the dielectric constant may change with temperature. Therefore, when the ambient temperature changes, the capacitance value of the sensor will also change accordingly, resulting in measurement error.

[0605] As another example, when a human body approaches or contacts the capacitance sensor, the human body itself can be regarded as a conductor and has a certain dielectric constant. The presence of the human body changes the space dielectric properties around the capacitance sensor, resulting in a change in the actual dielectric constant. At the same time, the human body may also increase the effective plate area of the sensor or reduce the equivalent plate distance, thereby changing the detection value of the capacitance sensor.

[0606] As another example, since the dielectric constant of the milk of each mother is different, when mother A uses the breast pump, the liquid level of the milk in the breast pump rises by 1 cm, and the detection value of the differential capacitance sensor assembly changes by 1 unit of capacitance value. However, when mother B uses the same structure of breast pump, if the dielectric constant of mother B's milk is greater than that of mother A's milk, then if the liquid level of the milk in the breast pump rises by 1 cm, the detection value of the differential capacitance sensor assembly changes by 1.1 units of capacitance value. And now the breast pump generally calculates the milk volume according to the preset mapping relationship according to the detection value, so if the preset mapping relationship is that the detection value changes by 1 unit of capacitance value corresponding to the liquid level change by 1 cm, then for mother B, the liquid level measured by the breast pump will always be higher than the true height.

[0607] Therefore, it is necessary to detect the unit height milk detection value, so as to exclude the interference of the above-mentioned interference factors on the milk volume or liquid level measurement.

[0608] Therefore, in order to ensure the detection accuracy, it is necessary to detect the unit height milk detection value.

[0609] In some embodiments, the differential capacitance sensor assembly for detecting the unit height milk detection value is arranged in the arrangement region close to the bottom of the milk storage container 20.

[0610] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the top of the milk storage container 20 in the arrangement region.

[0611] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the bottom of the milk storage container 20 in the arrangement region.

[0612] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the bottom of the milk storage container 20 in the arrangement region.

[0613] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the middle of the milk storage container 20 in the arrangement region.

[0614] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the middle of the milk storage container 20 in the arrangement region.

[0615] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the middle of the milk storage container 20 in the arrangement region.

[0616] In some embodiments, the differential capacitive sensor assembly for detecting the unit height milk detection value is arranged at a position close to the middle of the milk storage container 20 in the arrangement region.

[0617] Therefore, when there is no milk in the milk storage space, the detection value of the differential capacitor sensor assembly 42A will change as milk enters, but once the liquid level is higher than the maximum height of the liquid level detection range, the change in the liquid level will not cause the detection value of the differential capacitor sensor assembly 42A to change significantly. It can be considered that when the liquid level is higher than the liquid level detection range of the differential capacitor sensor assembly 42A, the change in the liquid level cannot affect the capacitance value of the differential capacitor sensor assembly 42A.

[0618] Furthermore, because the liquid level detection range that can be detected by the differential capacitor sensor assembly 42A is known, when the liquid level is higher than the liquid level detection range of the differential capacitor sensor assembly 42A, the unit height milk detection value can be obtained by dividing the detection value by the size of the liquid level detection range. For example, if the liquid level detection range is 0-0.5 cm and the detection value is 3 mF, then the unit height milk detection value = 3 mF / 0.5 cm = 6 mF / cm.

[0619] As a further example, if the working sensor and the reference sensor detect the same liquid with the same dielectric constant at the same height, the detection values are the same,

[0620] Therefore, as long as the relative relationship between the detection values of the working sensor (for example, the differential capacitor sensor assembly 41 for detecting milk volume or liquid level in FIG. 19) and the reference sensor when detecting the same liquid with the same dielectric constant at the same height is calibrated in advance, the detection value of the working sensor can be calibrated according to the detection value of the reference sensor, thereby eliminating the interference during milk volume or liquid level measurement, as well as the interference caused by different dielectric constants of mother's milk and factory errors, and improving the measurement accuracy.

[0621] It can be understood that the working sensor is not limited to the differential capacitor sensor assembly 41 for detecting milk volume or liquid level. Any sensor that is subject to the same interference as the reference sensor can be a working sensor.

[0622] It can be understood that when the liquid level changes within the liquid level detection range of the reference sensor, such as the differential capacitor sensor assembly 42A in FIG. 23, at this time, because of the uncertainty of the dielectric constant, the unit height milk detection value cannot be determined according to the detection value of the differential capacitor sensor assembly. It needs to wait until the liquid level rises above or equal to the liquid level detection range.

[0623] Therefore, the differential capacitor sensor assembly for detecting the unit height milk detection value is set to have a smaller detectable liquid level detection range.

[0624] Further, the liquid level detection range of the differential capacitance sensor assembly 42A can be adjusted by adjusting the distance between the first electrode 421A and the second electrode 422A, or the distance between the first electrode 421A and the second electrode 422A and the bottom of the milk storage container 20.

[0625] The arrangement of the differential capacitance sensor assembly for measuring the unit height milk detection value will be described in detail below with reference to embodiments.

[0626] In some embodiments, as shown in FIG. 20, the differential capacitance sensor assembly for measuring the unit height milk detection value is the differential capacitance sensor assembly 42B arranged at a position of the main body 33 close to the bottom of the milk storage container 20. The electric field lines of the differential capacitance sensor assembly 42B penetrate the bottom of the milk storage container, and the differential capacitance sensor assembly 42B is used to detect both the empty milk state and the unit height milk detection value.

[0627] In other embodiments, as shown in FIGS. 19 and 20, the differential capacitance sensor assembly for measuring the unit height milk detection value is the differential capacitance sensor assembly 43 arranged at a position of the main body 33 close to the top of the milk storage container 20. The electric field lines of the differential capacitance sensor assembly 43 penetrate the top of the milk storage container 20, and the differential capacitance sensor assembly 43 is used to detect both the full milk state and the unit height milk detection value.

[0628] In yet other embodiments, as shown in FIGS. 19 and 21, the differential capacitance sensor assembly for measuring the unit height milk detection value is the differential capacitance sensor assembly 42A arranged in the base 34. The electric field lines of the differential capacitance sensor assembly 42A penetrate the bottom of the milk storage container 20, and the differential capacitance sensor assembly 42A is used to detect both the empty milk state and the unit height milk detection value.

[0629] In yet other embodiments, as shown in FIGS. 19 and 21, the differential capacitance sensor assembly for measuring the unit height milk detection value is the differential capacitance sensor assembly 44 arranged in the top base 35. The electric field lines of the differential capacitance sensor assembly 44 penetrate the top of the milk storage container 20, and the differential capacitance sensor assembly 44 is used to detect both the full milk state and the unit height milk detection value.

[0630] The conventional inductive capacitive sensor is susceptible to external interference, and a common case is that the mother's hand touches the breast pump during breast pumping, causing a change in capacitance, resulting in the inductive capacitive sensor incorrectly outputting a high-level signal. The differential capacitive sensor assembly in the present application can be used to detect the unit height milk detection value, calibrate the detection value of the working sensor, increase the detection accuracy compared with the prior art, and prevent false judgments caused by various interferences to a large extent, so that the capacitive sensing method has more practical value in the breast pump.

[0631] The above introduces the setting area, setting method and embodiment of the differential capacitive sensor assembly with different functions. The combined setting method of multiple differential capacitive sensor assemblies for detecting different state parameters will be introduced below.

[0632] Optionally, the breast pump comprises at least one of the following differential capacitive sensor assemblies: a differential capacitive sensor assembly for detecting the amount of milk in the milk storage container, a differential capacitive sensor assembly for detecting the liquid level in the milk storage container, a differential capacitive sensor assembly for detecting the empty milk state, a differential capacitive sensor assembly for detecting the full milk state, and a capacitive sensor assembly for detecting the unit height milk detection value, and the number of each differential capacitive sensor assembly is at least one.

[0633] The combined setting method of multiple differential capacitive sensor assemblies for detecting different state parameters will be described in detail below with reference to the embodiments. Please refer to FIGS. 24-28, which are different combined setting methods of multiple differential capacitive sensor assemblies provided by the embodiments of the present application.

[0634] FIGS. 24 and 28 both take the main shell 31 as an example for illustration, but the present application is not limited thereto. In some cases, the same setting method can be set in different setting areas. In other cases, multiple differential capacitive sensor assemblies are set in different setting areas, but only when all the differential capacitive sensor assemblies are projected onto the main shell 31, the combined setting method shown in FIGS. 24-28 is presented. Therefore, the embodiments shown in FIGS. 24-28 should not be understood as limiting the differential capacitive sensor assemblies to being set in the main shell 31.

[0635] In FIGS. 24-28, the main shell 31 is divided into three areas along the rising direction of the milk liquid level, which are the bottom area C, the middle area B and the top area A. The above division method can be applied to the remaining setting areas.

[0636] In some cases, the maximum height of the bottom region C is less than or equal to a preset percentage times the maximum liquid level height, and the minimum height of the top region A is greater than or equal to the preset percentage times the maximum liquid level height. As an example, the preset percentage can be 30%, 25%, etc., without limitation.

[0637] In other cases, the maximum height of the bottom region C is less than or equal to a first preset height, and the minimum height of the top region A is greater than or equal to a second preset height. As an example, the first preset height and the second preset height can each be 5 cm, 6 cm, etc., without limitation.

[0638] As an optional way, the detection electrode assembly of the differential capacitive sensor assembly for detecting the milk full state is arranged in the top region A. As another optional way, the detection electrode assembly of the differential capacitive sensor assembly for detecting the empty milk state is arranged in the bottom region C. As yet another optional way, the detection electrode assembly of the differential capacitive sensor assembly for detecting the milk amount or the liquid level height range is arranged in at least two regions of the bottom region C, the top region A, and the middle region B. As still another optional way, the detection electrode assembly of the differential capacitive sensor assembly for detecting the unit height milk liquid detection value is arranged in one of the bottom region C, the top region A, and the middle region B.

[0639] In one possible implementation, as shown in FIG. 24, FIG. 24 includes: a differential capacitive sensor assembly 45A, a differential capacitive sensor assembly 46A, and a differential capacitive sensor assembly 47A. The differential capacitive sensor assembly 45A includes an electrode 451A and an electrode 452A, the differential capacitive sensor assembly 46A includes an electrode 461A and an electrode 462A, and the differential capacitive sensor assembly 47A includes an electrode 471A and an electrode 472A.

[0640] The differential capacitive sensor assembly 45A is used to detect the liquid level height or the milk amount. Optionally, the differential capacitive sensor assembly 45A is also used to detect the empty milk state. Optionally, the differential capacitive sensor assembly 45A is also used to detect the milk full state.

[0641] The differential capacitive sensor assembly 46A is used to detect at least one of the unit height milk liquid detection value and the empty milk state.

[0642] The differential capacitive sensor assembly 47A is used to detect at least one of the unit height milk liquid detection value and the milk full state.

[0643] The rising direction of the milk liquid level is defined as the vertical direction. In the horizontal direction, the electrodes 461A and 462A in FIG. 24 are arranged between the electrodes 451A and 452A. The electrodes 471A and 472A are arranged between the electrodes 451A and 452A. At this time, the differential capacitive sensor assembly 45A can completely detect the change in the liquid level from empty milk to full milk.

[0644] When the breast pump changes from the empty milk state to the non-empty milk state, the differential capacitive sensor assembly 45A and the differential capacitive sensor assembly 46A simultaneously detect the change in the capacitance. Two differential capacitive sensor assemblies can detect the empty milk state. Similarly, when the breast pump changes from the non-full milk state to the full milk state, the differential capacitive sensor assembly 45A and the differential capacitive sensor assembly 47A simultaneously detect the change in the capacitance. Two differential capacitive sensor assemblies can detect the full milk state. In this way, the detection accuracy of the empty milk or full milk state can be improved.

[0645] In another possible implementation, as shown in FIG. 25, FIG. 25 includes: a differential capacitive sensor assembly 45B, a differential capacitive sensor assembly 46B, and a differential capacitive sensor assembly 47B. The differential capacitive sensor assembly 45B includes electrodes 451B and 452B. The differential capacitive sensor assembly 46B includes electrodes 461B and 462B. The differential capacitive sensor assembly 47B includes electrodes 471B and 472B.

[0646] The differential capacitive sensor assembly 45B is configured to detect the liquid level or the milk amount.

[0647] The differential capacitive sensor assembly 46B is configured to detect at least one of the unit height milk liquid detection value and the empty milk state.

[0648] The differential capacitive sensor assembly 47B is configured to detect at least one of the unit height milk liquid detection value and the full milk state.

[0649] In the rising direction of the milk liquid level, the electrodes 451B in FIG. 25 are arranged between the electrodes 461B and 471B. The electrodes 452B are arranged between the electrodes 462B and 472B.

[0650] In the arrangement in FIG. 25, the differential capacitive sensor assembly 45B, the differential capacitive sensor assembly 46B, and the differential capacitive sensor assembly 47B are more compact in structure design. Less space can be reserved in the breast pump for arrangement, which is beneficial to the structure design.

[0651] In yet another possible implementation, as shown in FIG. 26, FIG. 26 includes: differential capacitive sensor assembly 48A, differential capacitive sensor assembly 49A, differential capacitive sensor assembly 47C. Differential capacitive sensor assembly 48A includes electrode 481A and electrode 482A, differential capacitive sensor assembly 49A includes electrode 491A and electrode 492A, differential capacitive sensor assembly 47C includes electrode 471C and electrode 472C.

[0652] Differential capacitive sensor assembly 48A is configured to detect the liquid level or milk volume. Optionally, differential capacitive sensor assembly 48A is further configured to detect the milk full state.

[0653] Differential capacitive sensor assembly 49A is configured to detect the liquid level or milk volume. Optionally, differential capacitive sensor assembly 49A is further configured to detect the empty milk state.

[0654] Differential capacitive sensor assembly 47C is configured to detect at least one of the unit height milk liquid detection value and the milk full state.

[0655] In FIG. 26, the entire liquid level change is detected by two differential capacitive sensor assemblies 48A and 49A with shorter lengths, which has higher accuracy than detecting the entire liquid level change by a single differential capacitive sensor assembly, and thus the detection accuracy is improved. Moreover, the differential capacitive sensor assembly for detecting the empty milk is no longer separately provided, and the empty milk state is detected by differential capacitive sensor assembly 49A, thereby saving the space for arrangement.

[0656] In yet another possible implementation, as shown in FIG. 27, FIG. 27 includes: differential capacitive sensor assembly 48B, differential capacitive sensor assembly 49B, differential capacitive sensor assembly 47D. Differential capacitive sensor assembly 48B includes electrode 481B and electrode 482B, differential capacitive sensor assembly 49B includes electrode 491B and electrode 492B, differential capacitive sensor assembly 47D includes electrode 471D and electrode 472D.

[0657] Differential capacitive sensor assembly 48B is configured to detect the liquid level or milk volume. Optionally, differential capacitive sensor assembly 48B is further configured to detect the milk full state.

[0658] Differential capacitive sensor assembly 49B is configured to detect the liquid level or milk volume. Optionally, differential capacitive sensor assembly 49B is further configured to detect the empty milk state.

[0659] Differential capacitive sensor assembly 47D is configured to detect at least one of the unit height milk liquid detection value and / or the milk full state.

[0660] In the arrangement of FIG. 27, the structure design among the differential capacitive sensor assembly 48B, the differential capacitive sensor assembly 49B and the differential capacitive sensor assembly 47D is more compact, and less space can be reserved in the breast pump for arrangement, which is beneficial to the structure design.

[0661] In yet another possible implementation, as shown in FIG. 28, the arrangement of FIG. 28 includes the differential capacitive sensor assembly 48C, the differential capacitive sensor assembly 49C, the differential capacitive sensor assembly 47E and the differential capacitive sensor assembly 46C. The differential capacitive sensor assembly 48C includes the electrode 481C and the electrode 482C, the differential capacitive sensor assembly 49C includes the electrode 491C and the electrode 492C, the differential capacitive sensor assembly 47E includes the electrode 471E and the electrode 472E, and the differential capacitive sensor assembly 46C includes the electrode 461C and the electrode 462C.

[0662] The differential capacitive sensor assembly 48C is configured to detect the liquid level or the milk amount. Optionally, the differential capacitive sensor assembly 48C is further configured to detect the full milk state.

[0663] The differential capacitive sensor assembly 49C is configured to detect the liquid level or the milk amount. Optionally, the differential capacitive sensor assembly 49C is further configured to detect the empty milk state.

[0664] The differential capacitive sensor assembly 47E is configured to detect the unit height milk detection value and / or the full milk state.

[0665] The differential capacitive sensor assembly 46C is configured to detect the unit height milk detection value and / or the empty milk state.

[0666] In the arrangement of FIG. 28, the state parameters of each milk storage container are detected by two differential capacitive sensor assemblies, which can ensure the detection accuracy. Moreover, the structure design is compact, which is beneficial to the structure design.

[0667] It can be understood that the above arrangement is only used for illustration, and the present application is not limited to the arrangement in the above implementation. The above embodiments should not be understood as a limitation to the present application.

[0668] The second type of breast pump will be introduced below.

[0669] Please refer to FIG. 29, which is a first perspective view of the second type of breast pump according to an embodiment of the present application, and FIG. 30, which is a first exploded view of the second type of breast pump according to an embodiment of the present application.

[0670] As shown in FIG. 29 and FIG. 30, the second breast pump 100 includes a breast shield 110, a milk storage container 120 and a main machine 130.

[0671] The breast shield 110 is used to cover and fit the human breast, and the breast shield 110 comprises a flange in the shape of a trumpet for fitting the breast and a nipple receiving portion for receiving the nipple.

[0672] The milk storage container 120 is used to receive and store the breast milk collected by the breast shield 110, and the milk storage container 120 is in communication with the breast shield 110.

[0673] Optionally, the milk storage container 120 comprises a milk bowl, a milk bottle or the like, which is not limited in the present application.

[0674] The host 130 comprises a negative pressure mechanism and a shell. The negative pressure mechanism can directly or indirectly apply negative pressure to the breast shield 110 to suck the breast milk into the milk storage container 120.

[0675] In the present application, the direct or indirect application of negative pressure to the breast shield refers to: preferably, the indirect application of negative pressure to the breast shield, which is usually used in a gas pump for generating negative pressure, which is connected to a gas-liquid separation diaphragm or air bag through a gas path, and the negative pressure is transmitted to the breast shield through the deformation of the diaphragm or air bag, so as to prevent the milk from being sucked into the negative pressure pump, polluting the milk, and damaging the gas pump or circuit; the direct application of negative pressure to the breast shield refers to that the gas pump is directly connected to the breast shield through a gas path, and the negative pressure is directly applied to the inside of the breast shield, which is a secondary way.

[0676] Optionally, the negative pressure mechanism comprises but is not limited to a piezoelectric pump, a diaphragm pump, a hydraulic pump, a mechanical pump or the like.

[0677] In one possible embodiment, the negative pressure mechanism can be directly connected to the breast shield 110 to cause negative pressure inside the breast shield 110. In another possible embodiment, the negative pressure mechanism transmits negative pressure to a diaphragm or an air bag or the like liquid barrier to indirectly cause negative pressure inside the breast shield 110, for example, the negative pressure mechanism indirectly causes negative pressure inside the breast shield 110 through the diaphragm in FIG. 19.

[0678] Optionally, the negative pressure mechanism is at least partially arranged in the shell, and the shell can further comprise an energy supply module, a negative pressure gas path, a control circuit board, a solenoid valve and the like components.

[0679] Please refer to FIG. 31 again, which is a schematic diagram of the host of the second type of breast pump provided in the embodiments of the present application. As shown in FIG. 31, the shell 131 of the host 130 comprises a shell body 1311 which is fitted with the milk storage container 120 and a shell body 1312 which is fitted with the milk storage container 120 and extends towards the milk storage container 120.

[0680] The shell body 1311 in FIG. 31 can be regarded as the bottom wall of the host 130.

[0681] The shell 1312 in FIG. 31 only extends to a position close to the top of the milk storage container 120. In some cases, the shell 1312 can extend to a position close to the bottom of the milk storage container 120. In other cases, the shell 1312 can extend to a position abutting the bottom of the milk storage container 120.

[0682] Please refer to FIG. 32 and FIG. 33 again. FIG. 32 is a first schematic view of a milk suction device of a second type provided in embodiments of the present application. FIG. 33 is a second schematic view of a milk suction device of the second type provided in embodiments of the present application.

[0683] As shown in FIG. 32 and FIG. 33, the shell 124 of the milk storage container 120 includes a top wall 1241, a side wall 1242, and a bottom wall 1243.

[0684] In some embodiments, the differential capacitive sensor assembly is arranged on an outer side of the shell of the milk storage container that does not contact the milk. In other embodiments, the differential capacitive sensor assembly is arranged on an outer side of the shell of the milk storage container that does not contact the milk and is away from the interior of the milk storage container.

[0685] By way of example, in the milk suction device 100 of the second type, the areas where the differential capacitive sensor assembly can be arranged include, but are not limited to:

[0686] 1. The outer side of the top wall 1241 that does not contact the milk.

[0687] 2. The outer side of the side wall 1242 that does not contact the milk.

[0688] 3. The outer side of the bottom wall 1243 that does not contact the milk.

[0689] 4. The inner side of the shell 1311 close to the milk storage container 120 or the outer side of the shell 1311 away from the milk storage container 120.

[0690] 5. The inner side of the shell 1312 close to the milk storage container 120 or the outer side of the shell 1312 away from the milk storage container 120.

[0691] It can be understood that when the structure of the milk suction device changes, the optional arrangement areas also change accordingly. The above-mentioned optional arrangement areas should not be understood as limitations made by embodiments of the present application. The arrangement principles of the differential capacitive sensor assembly for detecting different parameters can be referred to the description in the milk suction device 1 of the first type, which will not be described herein again.

[0692] Optionally, the outer side of the top wall 1241 that does not contact the milk can be arranged with a differential capacitive sensor assembly for detecting the milk detection value per unit height and / or the full milk state, such as the differential capacitive sensor assembly 123 in FIG. 32. The differential capacitive sensor assembly 123 includes an electrode 1231 and an electrode 1232.

[0693] Optionally, the side wall 1242 near the top of the milk storage container 120 can be provided with a differential capacitance sensor assembly for detecting the unit height milk detection value and / or the milk full state. The side wall 1242 near the bottom of the milk storage container 120 can be provided with a differential capacitance sensor assembly for detecting the unit height milk detection value and / or the empty milk state. The side wall 1242 can be provided with a differential capacitance sensor assembly for detecting the milk volume or the liquid level in the direction of the rising liquid level, such as the differential capacitance sensor assembly 121 in FIG. 33, which includes the electrode 1211 and the electrode 1212.

[0694] Optionally, the outer side of the bottom wall 1243 not in contact with the milk can be provided with a differential capacitance sensor assembly for detecting the unit height milk detection value and / or the empty milk state, such as the differential capacitance sensor assembly 122 in FIG. 33, which includes the electrode 1221 and the electrode 1222.

[0695] Optionally, the shell 1311 in FIG. 31 is attached to the top wall 1241 of the milk storage container 120, so that the shell 1311 can be provided with a differential capacitance sensor assembly for detecting the unit height milk detection value and / or the milk full state.

[0696] Optionally, the shell 1312 in FIG. 31 extends to a position near the top of the milk storage container 120, so that it can be provided with a differential capacitance sensor assembly for detecting the unit height milk detection value and / or the milk full state. However, in some cases, if the shell 1312 extends to a position near the bottom of the milk storage container 120, a differential capacitance sensor assembly for detecting the milk volume or the liquid level in the direction of the rising liquid level can be provided. In other cases, if the shell 1312 extends to a position attached to the bottom of the milk storage container 120, a differential capacitance sensor assembly for detecting the unit height milk detection value and / or the empty milk state can be provided.

[0697] The above lists two different structures of breast pumps to introduce in detail the setting method of the differential capacitance sensor assembly, but the application is not limited to the two listed breast pump structures, and the setting idea disclosed in the application can also be applied to other breast pump structures, such as the structure of the host connected to the milk storage container through a three-way assembly.

[0698] In the application, after obtaining the detection value detected by the differential capacitance sensor assembly, i.e., the capacitance value of the parallel capacitor group in the differential capacitance sensor assembly, the state parameters of the milk storage container need to be calculated according to the detection value through a software algorithm.

[0699] The following describes how to calculate the state parameters of the milk storage container according to the detection value through a software algorithm.

[0700] Calculation of empty milk state:

[0701] In some embodiments, the milk storage container is considered to be in an empty milk state when the detection value of the differential capacitive sensor assembly for detecting the empty milk state is greater than a preset empty milk value, otherwise, the milk storage container is considered to be in a non-empty milk state. In some cases, the preset empty milk value is the detection value measured when the milk storage container is in an empty milk state at the factory. In other cases, the preset empty milk value is the detection value measured when the milk storage container is in an empty milk state at the factory plus a preset value, so as to avoid fluctuations in the detection value caused by some interference from causing the judgment to fail. The specific value of the preset value can be selected according to the actual situation, and the present application does not make any limitation.

[0702] In other embodiments, the processing unit can send the detection value to a server, a mobile phone or other terminal, and the server, the mobile phone or other terminal can perform the calculation to obtain the empty milk state.

[0703] Calculation of full milk state:

[0704] In some embodiments, the milk storage container is considered to be in a full milk state when the detection value of the differential capacitive sensor assembly for detecting the full milk state is greater than a preset full milk value, otherwise, the milk storage container is considered to be in a non-full milk state. In some cases, the preset full milk value is the detection value measured when the milk storage container is in a full milk state at the factory. In other cases, the preset full milk value is the detection value measured when the milk storage container is in a full milk state at the factory plus a preset value, so as to avoid fluctuations in the detection value caused by some interference from causing the judgment to fail. The specific value of the preset value can be selected according to the actual situation, and the present application does not make any limitation.

[0705] In other embodiments, the processing unit can send the detection value to a server, a mobile phone or other terminal, and the server, the mobile phone or other terminal can perform the calculation to obtain the full milk state.

[0706] Calculation of milk amount or liquid level:

[0707] In some embodiments, the processing unit can call a preset mapping relationship for indicating the correspondence between the detection value and the milk amount or the liquid level, and determine the milk amount or the liquid level according to the detection value and the preset mapping relationship. The preset mapping relationship can be a table, an array, a queue or a stack, and the present application does not make any limitation.

[0708] In other embodiments, the processing unit can send the detection value to a server, a mobile phone or other terminal, and the server, the mobile phone or other terminal can perform the calculation to obtain the milk amount or the liquid level.

[0709] Calculation of detection value of unit height milk liquid:

[0710] In some embodiments, the detection value of the differential capacitance sensor assembly for detecting the unit height milk detection value is divided by the detection height, and the result is equal to the unit height milk detection value. For example, if the differential capacitance sensor assembly can measure the liquid level change in the range of 8cm to 10cm, the detection height is 10cm-8cm=2cm.

[0711] In some other embodiments, the detection value of the differential capacitance sensor assembly for detecting the unit height milk detection value is divided by the detection height, and then needs to be processed by a preset method. The preset method may, for example, multiply a correction coefficient, or add or subtract a preset correction value.

[0712] For example, if the liquid level detection range of the differential capacitance sensor assembly is 8-10cm, and the detection value of the differential capacitance sensor assembly is slightly disturbed by the change of the liquid level when the liquid level is higher than 10cm or the liquid level is lower than 8cm, the correction coefficient or the preset correction value can be calculated according to the above disturbance,

[0713] Regarding the use of the unit height milk detection value:

[0714] The differential capacitance sensor assembly for detecting the unit height milk detection value is defined as a reference sensor. The working sensor is defined as a differential capacitance sensor assembly for detecting the state parameters of the remaining milk storage container, such as a differential capacitance sensor assembly for detecting the full milk state or the empty milk state or the milk amount or the liquid level.

[0715] In some embodiments, the true detection value of the working sensor = the detection value of the working sensor / unit height milk detection value.

[0716] In some other embodiments, the true detection value of the working sensor = f(detection value of the working sensor, unit height milk detection value), and f(x) is a preset mapping function. The specific form of f(x) can be measured according to the actual product, and the present application does not make any limitation.

[0717] The following will describe in detail how to calculate the state parameters of the milk storage container according to the reference sensor. For example, the embodiment shown in FIG. 24 is described, and for the sake of simplicity, the differential capacitance sensor assembly 45A in FIG. 24 is referred to as the first sensor, the differential capacitance sensor assembly 46A is referred to as the second sensor, and the differential capacitance sensor assembly 47A is referred to as the third sensor.

[0718] Please refer to FIG. 34, which is a schematic diagram of the full milk state detection method provided by the embodiment of the present application. In FIG. 34, the third sensor is used to detect the full milk state, and the second sensor 46A is used to detect the empty milk state and the unit height milk detection value. As shown in FIG. 34, the full milk state detection method 300 includes steps 310 to 390.

[0719] Step 310: Obtain the detection value of the third sensor.

[0720] Step 320: Determine whether the detection value of the third sensor is greater than the preset milk full value.

[0721] The preset milk full value can be referred to the introduction in the above part, and will not be repeated here.

[0722] If the detection value of the third sensor is greater than the preset milk full value, step 330 is executed. If the detection value of the third sensor is less than or equal to the preset milk full value, step 310 is returned to be executed.

[0723] In one case, the reason why the detection value of the third sensor is greater than the preset milk full value is that the breast pump is indeed in the empty milk state. But in other cases, the reason why the detection value of the third sensor is greater than the preset milk full value is that it is interfered by the outside world, such as hand touching, user movement causing liquid level fluctuation, breast pump tilting causing liquid level tilting, etc. Therefore, it cannot be directly considered that the milk storage container is in the milk full state when the detection value of the third sensor is greater than the preset milk full value.

[0724] In some embodiments, in order to exclude the false alarm caused by liquid level tilting, a tilt sensor for detecting whether the breast pump is tilted is also installed on the breast pump, and the tilt sensor is used to further improve the milk full detection accuracy. At this time, step 320 includes the following steps.

[0725] (1) Determine whether the detection value of the third sensor is greater than the preset milk full value.

[0726] (2) When the detection value of the third sensor is greater than the preset milk full value and the detection result of the tilt sensor is not tilted, step 330 is executed.

[0727] (3) When the detection value of the third sensor is greater than the preset milk full value and the detection result of the tilt sensor is tilted, a preset operation is executed.

[0728] Optionally, the preset operation in step (3) includes but is not limited to at least one of the following: 1. Stop the milk full detection for a preset time. 2. Send an error prompt to the display interface of the breast pump. 3. Send an error prompt to the terminal of the user.

[0729] Step 330: Obtain the detection value of the second sensor.

[0730] Step 340: Determine whether the detection value of the second sensor is greater than the preset empty milk value.

[0731] The preset empty milk value can be referred to the introduction in the above part, and will not be repeated here.

[0732] The second sensor is used for both empty milk detection and unit height milk detection. When the detection value of the second sensor is less than the preset empty milk value, it indicates that the milk storage container is in an empty milk state and cannot be in a full milk state.

[0733] If the detection value of the second sensor is greater than the preset empty milk value, step 350 is performed. If the detection value of the second sensor is less than or equal to the preset empty milk value, step 390 is performed.

[0734] Step 350: Determine whether the difference between the current detection value and the previous detection value of the second sensor is less than a preset difference value.

[0735] Because the detection value of the second sensor is greater than the preset empty milk value, the sensitivity of the second sensor to the change in liquid level height is low at this time, and thus it can be considered that the detection value of the second sensor is changed mainly due to external interference. Therefore, when the difference between the current detection value and the previous detection value of the second sensor is less than the preset difference value, it indicates that the second sensor is not interfered by external interference or is interfered by little external interference, and it can be considered that the third sensor is also not interfered by external interference or is interfered by little external interference, and step 360 is performed. When the difference between the current detection value and the previous detection value of the second sensor is greater than or equal to the preset difference value, it indicates that the second sensor is interfered by strong external interference, resulting in a large fluctuation in the detection value, and it can be considered that the third sensor is also interfered by strong external interference, and thus the error between the current detection value and the true detection value of the third sensor is large, and the detection value needs to be corrected, and step 370 is performed.

[0736] Step 360: Determine that the milk storage container is in a full milk state.

[0737] Step 370: Calculate a unit height milk detection value.

[0738] Alternatively, the unit height milk detection value is equal to the current detection value of the second sensor divided by the detection height, but the application is not limited thereto, and specific details can be referred to the introduction in the above part of the specification, which will not be repeated here.

[0739] Step 380: Update the detection value of the second sensor according to the unit height milk detection value.

[0740] The calculation method of the true detection value of the working sensor can be referred to the introduction in the above part of the specification, which will not be repeated here.

[0741] Step 390: Determine that the milk storage container is in a non-full milk state.

[0742] It can be understood that the above method flow is not limited to the third sensor, and the processing idea can be applied to the working sensor for detecting the parameters of the remaining milk storage container, such as the first sensor. The first sensor can also be determined whether it is interfered by the external environment through steps 340 and 350, and the real detection value of the first sensor can also be calculated through steps 370 and 380, and only the parameters of the second sensor in step 380 are replaced by the parameters of the first sensor. Therefore, the above method embodiment is only used for illustration, and should not be understood as a limitation on the present application.

[0743] In the above method, the second sensor is used as a reference sensor, and the third sensor is used as a working sensor, and the interference judgment and detection value correction of the third sensor can effectively avoid the influence of various interferences on the working sensor.

[0744] The application also provides a differential capacitive sensor assembly which can be detachably mounted on the milk storage container of the breast pump and detect the state parameters of the milk storage container.

[0745] The specific structure of the differential capacitive sensor assembly can refer to the description of any of the above embodiments, which will not be repeated here.

[0746] Optionally, the differential capacitive sensor assembly comprises a communication port for inserting a connection line to communicate with the breast pump.

[0747] Optionally, the differential capacitive sensor assembly comprises a wireless communication module for wireless communication with the breast pump.

[0748] In one possible implementation, the differential capacitive sensor assembly is in interference fit with the milk storage container. In another possible implementation, the differential capacitive sensor assembly is mounted with the milk storage container in a magnetic attraction manner. In yet another possible implementation, the differential capacitive sensor assembly is mounted with the milk storage container in a snap-fit manner. In yet another possible implementation, the differential capacitive sensor assembly is mounted with the milk storage container in a threaded manner. In yet another possible implementation, an elastic member on the differential capacitive sensor assembly is inserted into a socket of the milk storage container, and the position of the differential capacitive sensor assembly is fixed by the elastic force generated after the elastic member is deformed. The above examples are only used for illustration, and the application does not limit the mounting method of the differential capacitive sensor assembly and the milk storage container.

[0749] The application also provides a breast pump, which comprises a milk storage container, a milk volume detection capacitive sensor, a reference capacitive sensor, and a processing unit; the milk storage container is used for storing milk; the milk volume detection capacitive sensor is used for obtaining a first detection value, which comprises a current milk volume storage container capacitive detection value; the reference capacitive sensor is used for obtaining a second detection value, which comprises a unit height milk volume storage container capacitive detection value; and the processing unit is used for determining a liquid level height value or a milk volume value of the milk volume detection capacitive sensor corresponding milk storage container according to the first detection value of the milk volume detection capacitive sensor and the second detection value of the reference capacitive sensor.

[0750] In the application, the milk volume detection capacitive sensor is a capacitive sensor assembly for detecting the liquid level height or the milk volume, for example, a differential capacitive sensor assembly for detecting the liquid level height or the milk volume in any of the above embodiments.

[0751] Optionally, the current milk volume storage container capacitive detection value is equal to the first detection value, and the first detection value is a capacitive value of the milk volume detection capacitive sensor.

[0752] In the application, the reference capacitive sensor is a capacitive sensor assembly for detecting a unit height milk volume detection value, for example, a differential capacitive sensor assembly for detecting a unit height milk volume detection value in any of the above embodiments.

[0753] Optionally, the unit height milk volume detection value is equal to the second detection value, and the second detection value is a capacitive value of the reference capacitive sensor.

[0754] As an example, referring to FIG. 24, the milk volume detection capacitive sensor can be the differential capacitive sensor assembly 45A in the above embodiments, and the reference capacitive sensor can be the differential capacitive sensor assembly 46A or the differential capacitive sensor assembly 47A in the above embodiments.

[0755] As another example, referring to FIG. 33, the milk volume detection capacitive sensor can be the differential capacitive sensor assembly 121 in the above embodiments, and the reference capacitive sensor can be the differential capacitive sensor assembly 123 or the differential capacitive sensor assembly 122 in the above embodiments.

[0756] In some cases, in the direction of the rising of the milk liquid surface, the bottom of the parallel capacitive group of the milk volume detection capacitive sensor assembly and the bottom of the parallel capacitive group of the reference capacitive sensor assembly are at the same height, and the top of the parallel capacitive group of the milk volume detection capacitive sensor assembly is higher than the top of the parallel capacitive group of the reference capacitive sensor assembly. Thus, the two have the same liquid level height or milk volume detection range, and when the liquid level height or the milk volume is at the same liquid level height or milk volume detection range, the detection values of the two can also be verified with each other, thereby ensuring the detection accuracy.

[0757] In some other cases, the bottom of the parallel capacitor group of the milk volume detection capacitor sensor assembly is higher than the top of the parallel capacitor group of the reference capacitor sensor assembly in the direction in which the milk level rises. Thus, the required arrangement space is saved, and the structure is compact.

[0758] Preferably, the milk volume detection capacitor sensor assembly and the reference capacitor sensor assembly are arranged in the same arrangement area. Thus, the influence of various interference on the detection values of the milk volume detection capacitor sensor assembly and the reference capacitor sensor assembly is as same as possible.

[0759] By arranging the reference capacitor sensor assembly, the detection value of the milk volume detection capacitor sensor assembly can be corrected, the detection accuracy of the milk volume detection capacitor sensor assembly is improved, more accurate milk volume data is output to the user, and the breast pump needs to be controlled to stop when the milk storage container is full of milk to prevent milk overflow. Without the reference capacitor sensor assembly, the stop operation is easily triggered by external interference, resulting in poor user experience of the breast pump.

[0760] The application also provides a breast pump, which comprises a milk storage container and a non-contact empty milk detection sensor assembly; the milk storage container is used for storing milk; and the empty milk detection sensor assembly is used for detecting the empty milk state of the milk storage container; wherein the empty milk state comprises an empty milk condition and a non-empty milk condition.

[0761] The empty milk detection sensor assembly is used for detecting the empty milk state of the milk storage container. It can be understood that when the milk storage container changes from the empty milk condition to the non-empty milk condition, it means that milk enters the milk storage container, i.e., the user starts to express milk.

[0762] Specifically, when the empty milk state is the empty milk condition, no milk is stored in the milk storage container or the amount of stored milk is less than a preset empty milk value; and when the empty milk state is the non-empty milk condition, milk is stored in the milk storage container or the amount of stored milk is greater than or equal to the preset empty milk value.

[0763] In one possible implementation, the host 30 comprises a host shell 31, the empty milk detection sensor assembly comprises a sensor unit, the sensor unit is arranged on the host shell 31, the host shell 31 is mounted on the outer side of the milk storage container shell 21 or at least partially contacts the outer side of the milk storage container shell 21, and the sensor unit is close to or contacts the outer side of the milk storage container shell 21.

[0764] When the empty milk detection sensor assembly is a capacitive sensor assembly, the sensor unit includes a capacitive unit in the capacitive sensor assembly; when the capacitive sensor assembly is a differential capacitive sensor assembly, the capacitive unit includes a detection electrode assembly of the differential capacitive sensor assembly. When the empty milk detection sensor assembly is a photoelectric sensor assembly, the sensor unit includes a light emitter and a light receiver in the photoelectric sensor assembly. Thus, the empty milk state of the milk storage container is accurately detected by the sensor unit.

[0765] In another possible implementation, the empty milk detection sensor assembly is a capacitive sensor assembly, the host 30 includes a main body 33 extending along the rising direction of the milk liquid surface, the milk storage container 20 includes a side wall extending along the rising direction of the milk liquid surface, the main body 33 contacts or is close to the side wall, and the capacitive sensor assembly is arranged in the main body.

[0766] In the possible implementation, the side wall of the milk storage container 20 extending along the rising direction of the milk liquid surface can be the second shell 212 in FIG. 2.

[0767] In another possible implementation, the empty milk detection sensor assembly is a photoelectric sensor, and at least part of the milk storage container 20 is a transparent or translucent shell. The photoelectric sensor detects the empty milk state of the milk storage container through the transparent or translucent structure on the milk storage container.

[0768] Further, in the possible implementation, if the photoelectric sensor is arranged inside the host 30, at least part of the host shell 31 is a transparent or translucent shell, and the transparent or translucent shell in the host shell 31 corresponds to the position of the transparent or translucent shell in the milk storage container 20.

[0769] Please refer to FIGS. 35 and 36. FIG. 35 is a first arrangement schematic diagram of a photoelectric sensor according to an embodiment of the present application. FIG. 36 is a second arrangement schematic diagram of a photoelectric sensor according to an embodiment of the present application. As shown in FIGS. 35 and 36, the empty milk detection sensor assembly can also be a photoelectric sensor 51 or a photoelectric sensor 52.

[0770] In the embodiment shown in FIG. 35, the photoelectric sensor 51 is arranged on the base 34 and emits detection light toward the bottom of the milk storage container 20 and receives reflected light.

[0771] In the embodiment shown in FIG. 36, the photoelectric sensor 52 is arranged on the main body 33 close to the bottom of the milk storage container and emits detection light toward the bottom of the milk storage container 20 and receives reflected light.

[0772] In some cases, the photoelectric sensor can be a reflective photoelectric sensor, when the milk storage container is empty, the reflected light intensity is low, when the milk storage container has liquid, the reflected light intensity is high, and the empty milk state can be determined according to the intensity of the reflected light. In other cases, the photoelectric sensor can also be a transmission photoelectric sensor or a transmission photoelectric sensor or a scattering photoelectric sensor, which is not limited by the application.

[0773] In another possible implementation, the empty milk detection sensor assembly is a pressure sensor, which detects whether the milk storage container flows into the milk liquid by detecting the pressure increase.

[0774] In the use scenario of the breast pump, the mother is very concerned about whether the breast pump has pumped out the mother's milk. The setting of the empty milk detection sensor assembly can determine whether the breast pump is empty or not. Non-empty milk means that the mother's milk has been pumped out, reminding the mother that the milk has been discharged at present, and the detection of the empty milk state is crucial for the switching of the breast pump mode or the automatic start of the operation.

[0775] In some cases, the milk pumped out by the breast pump flows into the milk storage container from the milk inlet, and the empty milk detection sensor assembly is correspondingly arranged at the milk inlet position of the milk inlet. Further, in the direction of the rising of the milk liquid surface, the empty milk detection sensor assembly is at least partially arranged below the milk inlet.

[0776] As an example, the milk inlet can be a valve of a one-way valve, or an outlet of a milk inlet channel connected to the milk storage container and the breast shield.

[0777] And the milk usually flows into the milk storage container by gravity, so arranging the empty milk detection sensor assembly at least partially below the milk inlet can detect the milk when the milk flows into the milk storage container.

[0778] Next, how to control the breast pump according to the empty milk state to improve the pumping effect will be introduced. Please refer to FIG. 37 again, which is a flowchart of a control method of a breast pump provided by an embodiment of the application.

[0779] As shown in FIG. 37, the control method 400 of the breast pump includes steps 410 to 420.

[0780] Step 410: Obtain the detection value of the empty milk detection sensor assembly.

[0781] Wherein, the empty milk detection sensor assembly is a capacitive sensor assembly, and the detection value is the capacitance value of the capacitive sensor assembly.

[0782] Wherein, the empty milk detection sensor assembly is a photoelectric sensor assembly, and the detection value is a high level signal and a low level signal, or a voltage value, or a current value.

[0783] Step 420: in the case of determining that the breast pump is not empty according to the detection value, controlling the breast pump to switch from the first working mode to the second working mode.

[0784] In one possible implementation, step 420 includes: in the case of determining that the breast pump is not empty according to the detection value, controlling the breast pump to switch from the mode of stimulating milk secretion to the mode of milk extraction.

[0785] The mode of stimulating milk secretion at least includes at least one of a simulated sucking function, a hot compress function, a vibration function, a massage function, and an electric stimulation function.

[0786] The simulated sucking function is to stimulate the mammary glands by simulating the frequency and rhythm of infant sucking to promote milk secretion. The hot compress function is to promote milk secretion by heating. The vibration function is to stimulate the breast by generating slight vibration. The massage function is to promote milk secretion by massage. The electric stimulation function is to stimulate the breast by weak current to promote milk secretion.

[0787] Further, the mode of stimulating milk secretion can simultaneously have multiple functions, for example, simultaneously including a hot compress mode and a massage mode.

[0788] In another possible implementation, step 420 includes the step of: in the case of determining that the breast pump is not empty according to the detection value, controlling the breast pump to switch from the first milk extraction mode to the second milk extraction mode; wherein at least one of the milk extraction frequency and the milk extraction strength in the second milk extraction mode is greater than that in the first milk extraction mode.

[0789] By monitoring the empty milk state, the milk extraction efficiency can be improved, and the pain of the breast caused by strong milk extraction when there is no milk secretion can be avoided.

[0790] The present application provides another breast pump, which includes: a milk storage container and a capacitive sensor assembly; the milk storage container is used for storing extracted milk; the capacitive sensor assembly is used for detecting parameters of the milk storage container; and the capacitive sensor assembly is arranged on the outside of the milk storage container without contacting the milk.

[0791] The capacitive sensor assembly can include the differential capacitive sensor assembly in any of the above embodiments.

[0792] In some embodiments, the differential capacitive sensor assembly is a first type of differential capacitive sensor assembly for detecting the empty milk state and the unit height milk detection value of the milk storage container.

[0793] One differential capacitive sensor assembly in the present application can have multiple functions, which can save the setting space in the breast pump and is conducive to the miniaturization and refinement of the breast pump.

[0794] The embodiment of the present application also provides another breast pump, comprising one or more processors and a memory. In some embodiments, the processor is configured to execute the milk full state detection method in the above-mentioned embodiments, for example, the method steps 310 to 390 in FIG. 34, or execute the control method of the breast pump in the above-mentioned embodiments, for example, the method steps 410 to 420 in FIG. 37.

[0795] The embodiment of the present application provides another computer readable storage medium. The computer readable storage medium stores program codes, which can be invoked by a processor to execute the milk full state detection method of the breast pump in any of the above-mentioned method embodiments, for example, the method steps 310 to 390 in FIG. 34, or execute the control method of the breast pump in the above-mentioned embodiments, for example, the method steps 410 to 420 in FIG. 37.

[0796] The present application also provides a computer program product, which comprises a computer program (also referred to as code or instructions), which, when executed, causes a computer to execute the milk full state detection method or the control method of the breast pump in any of the above-mentioned method embodiments.

[0797] The present application provides still another breast pump, which comprises a milk storage container and a plurality of sets of capacitive sensor assemblies; the milk storage container comprises a milk storage container shell, which comprises an inner side in contact with milk and an outer side not in contact with milk; each set of capacitive sensor assemblies comprises a detection electrode assembly, and each detection electrode assembly is arranged on or close to the outer side of the outer side. The plurality of sets of capacitive sensor assemblies detect different state parameters of the milk storage container.

[0798] The capacitive sensor assembly can comprise the differential capacitive sensor assembly in any of the above-mentioned embodiments.

[0799] By arranging a plurality of sets of differential capacitive sensor assemblies, the parameters of the milk storage container can be comprehensively detected, and the user experience and the intelligence of the breast pump can be improved.

[0800] The present application provides still another breast pump, which comprises a milk storage container and three sets of differential capacitive sensor assemblies; the first set of differential capacitive sensor assemblies comprises a first detection electrode assembly, which is arranged in a bottom region in the milk level rising direction of the milk storage container; the second set of differential capacitive sensor assemblies comprises a second detection electrode assembly, which is arranged in a top region in the milk level rising direction of the milk storage container; and the third set of differential capacitive sensor assemblies comprises a third detection electrode assembly, which extends from the bottom region to the top region in the milk level rising direction of the milk storage container.

[0801] The height of the bottom of the third detection electrode assembly is lower than or equal to the height of the top of the first detection electrode assembly in the direction of the rising of the milk liquid level in the milk storage container, and the height of the top of the third detection electrode assembly is higher than or equal to the height of the bottom of the second detection electrode assembly.

[0802] The first group of differential capacitive sensor assemblies are used to detect the full milk state of the milk storage container; the second group of differential capacitive sensor assemblies are used to detect at least one of the empty milk state of the milk storage container and the milk liquid level detection value of unit height; and the third group of differential capacitive sensor assemblies are used to detect the milk amount in the milk storage container or the liquid level height in the milk storage container.

[0803] For specific details, refer to FIG. 24 and the related description in any embodiment, which will not be repeated here.

[0804] For example, in this embodiment, the first differential capacitive sensor assembly can be the differential capacitive sensor assembly 46A in FIG. 24, the second differential capacitive sensor assembly can be the differential capacitive sensor assembly 47A in FIG. 24, and the third differential capacitive sensor assembly can be the differential capacitive sensor assembly 45A in FIG. 24.

[0805] The present application provides still another breast pump, which comprises a milk storage container and three groups of differential capacitive sensor assemblies; the first group of differential capacitive sensor assemblies comprises a first detection electrode assembly, which is arranged in a top region in the direction of the rising of the milk liquid level in the milk storage container; the second group of differential capacitive sensor assemblies comprises a second detection electrode assembly, which extends from a bottom region to a middle region in the direction of the rising of the milk liquid level in the milk storage container; and the third group of differential capacitive sensor assemblies comprises a third detection electrode assembly, which extends from the middle region to a top region in the direction of the rising of the milk liquid level in the milk storage container.

[0806] The height of the bottom of the third detection electrode assembly is higher than the height of the top of the second detection electrode assembly in the direction of the rising of the milk liquid level.

[0807] The first group of differential capacitive sensor assemblies are used to detect the full milk state of the milk storage container; the second group of differential capacitive sensor assemblies are used to detect the milk amount in the first milk amount range or the liquid level height in the first liquid level height range of the milk storage container; and the third group of differential capacitive sensor assemblies are used to detect the milk amount in the second milk amount range or the liquid level height in the second liquid level height range of the milk storage container.

[0808] For specific details, refer to FIG. 27 and the related description in any embodiment, which will not be repeated here.

[0809] Exemplarily, in this embodiment, the first differential capacitive sensor assembly can be the differential capacitive sensor assembly 47D in FIG. 27, the second differential capacitive sensor assembly can be the differential capacitive sensor assembly 48B in FIG. 27, and the third differential capacitive sensor assembly can be the capacitive sensor 49B in FIG. 27.

[0810] The application provides still another breast pump, comprising a milk storage container and three sets of differential capacitive sensor assemblies; the first set of differential capacitive sensor assemblies comprises a first detection electrode assembly, which is arranged at a top region in the milk level rising direction in the milk storage container; the second set of differential capacitive sensor assemblies comprises a second detection electrode assembly, which is arranged at a bottom region in the milk level rising direction in the milk storage container; and the third set of differential capacitive sensor assemblies comprises a third detection electrode assembly, the height of the top of the third detection electrode assembly is lower than the height of the first detection electrode assembly, and the height of the bottom of the third detection electrode assembly is higher than the height of the second detection electrode assembly in the milk level rising direction in the milk storage container.

[0811] In the milk level rising direction, the third detection electrode assembly extends from the bottom region to the top region.

[0812] The first set of differential capacitive sensor assemblies is used to detect the full milk state of the milk storage container; the second set of differential capacitive sensor assemblies is used to detect at least one of the empty milk state of the milk storage container and the unit height milk detection value; and the third set of differential capacitive sensor assemblies is used to detect the milk amount in the milk storage container or the liquid level height in the milk storage container.

[0813] For specific details, refer to FIG. 25 and the related description in any embodiment, which will not be repeated here.

[0814] Exemplarily, the first set of differential capacitive sensor assemblies is the differential capacitive sensor assembly 47B in FIG. 25, the second set of differential capacitive sensor assemblies is the differential capacitive sensor assembly 46B in FIG. 25, and the third set of differential capacitive sensor assemblies is the differential capacitive sensor assembly 45B in FIG. 25.

[0815] The capacitive sensor assembly in the application is not limited to the integrated breast pump in which the host and the milk bowl are integrated, but can also be implemented in the split breast pump configuration in which the host and the milk storage container are not integrated or not completely integrated. The split breast pump includes two types:

[0816] The first type is that the breast pumping assembly formed by the breast shield and the milk storage container is integrated on the chest, and the flexible air tube is connected to the main machine with the air pump placed outside or the handheld main machine with the air pump; generally, the flexible air tube is connected to the milk storage container through a connecting cover to directly or indirectly transmit the negative pressure to the breast shield or the milk storage container. Preferably, the capacitive sensor assembly or the differential capacitive sensor assembly in the above embodiment can be integrated on the cover, or the capacitive sensor assembly or the differential capacitive sensor assembly is a separate detachable accessory detachably connected with the milk storage container and transmits signals to the main machine through wires or wireless signals.

[0817] Referring to FIG. 38, FIG. 38 is a structural schematic diagram of the third type of breast pump provided in the embodiments of the present application. As shown in FIG. 38, FIG. 38 includes a breast pumping assembly 310 and a main machine 320, and the breast pumping assembly 310 further includes a breast shield (not shown in the figure), a milk storage container 311, and a negative pressure cabin cover 312.

[0818] The main machine 320 and the negative pressure cabin cover 312 are connected through the flexible air tube to directly or indirectly transmit the negative pressure to the breast shield.

[0819] Further, FIG. 38 further includes a three-way joint 330, through which the main machine 320 can be connected to multiple breast pumping assemblies to simultaneously or individually provide negative pressure for the multiple breast pumping assemblies.

[0820] The sensor assembly 340 in FIG. 38 can be a capacitive sensor assembly or a differential capacitive sensor assembly, and the sensor assembly 340 is integrated in the milk storage container 311 in FIG. 38. Preferably, the sensor assembly 340 is detachably installed with the milk storage container 311.

[0821] In a possible implementation, the sensor assembly 340 can also be integrated in the negative pressure cabin cover 312, and the sensor assembly 340 is preferably detachably installed with the negative pressure cabin cover 312.

[0822] The second type is that the breast pumping assembly formed by the breast shield and the milk storage container is integrated on the chest, and the first main machine with the air pump is also integrated on the breast pumping assembly, the first main machine directly or indirectly transmits the negative pressure to the breast shield or the milk storage container, and the first main machine is connected to the second main machine outside through wires, and the second main machine includes a battery and a control panel; preferably, the capacitive sensor assembly or the differential capacitive sensor assembly in the above embodiment can be integrated on the first main machine, or the capacitive sensor assembly or the differential capacitive sensor assembly is a separate detachable accessory detachably connected with the milk storage container and transmits signals to the second main machine through wires or wireless signals.

[0823] The air pump used in the present application includes but is not limited to a diaphragm pump, a piston pump, a piezoelectric pump, etc., and also includes other pumps or negative pressure driving modes that can be applied to the breast pump.

[0824] The breast pump form in the embodiments of the present application is only used for explanation and illustration, and the scope of protection of the present application is not limited to the breast pump form in the embodiments.

[0825] In the description of the present specification, the description referring to the terms "in some embodiments", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0826] Furthermore, the above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A breast pump, characterized in that The breast pump comprises a milk storage container for storing milk and a differential capacitance sensor assembly for detecting a state parameter of the milk storage container; The milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side in contact with milk and an outer side not in contact with milk; The differential capacitance sensor assembly comprises a detection electrode assembly arranged on or near the outer side of the milk storage container shell.

2. The breast pump of claim 1, wherein, The state parameter of the milk storage container comprises at least one of the amount of milk in the milk storage container, the liquid level in the milk storage container, the empty milk state, the milk state, the full milk state, and the milk detection value per unit height.

3. The breast pump of claim 1, wherein, The detection electrode assembly is detachably fixed to the outer side of the milk storage container shell, or is detachably fixed to the outer side near the outer side of the milk storage container shell.

4. The breast pump of claim 1, wherein, The differential capacitance sensor assembly further comprises a control circuit; The detection electrode assembly comprises at least one set of oppositely arranged parallel capacitors, the parallel capacitors comprising a first electrode and a second electrode; The control circuit is used at least for charging the detection electrode assembly and detecting the capacitance value of the detection electrode assembly.

5. The breast pump of claim 4, wherein, The first electrode and the second electrode are parallel plate electrodes, and the first electrode and the second electrode extend in the direction of the rising of the milk liquid level.

6. The breast pump of claim 4, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, the conversion unit comprises an excitation module, a sampling module and a conversion module; The excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal; The processing unit is used to calculate the state parameter of the milk storage container corresponding to the differential capacitance sensor assembly according to the digital signal.

7. The breast pump of claim 4, wherein, The distance between the first electrode and the second electrode is greater than the distance between the differential capacitance sensor assembly and the inner side of the milk storage container shell.

8. The breast pump of claim 4, wherein, The breast pump further comprises a host, and the differential capacitance sensor assembly is arranged in the host.

9. The breast pump of claim 8, wherein, The host comprises a host shell, the detection electrode assembly is arranged on the host shell, and the host shell is mounted on the outer side of the milk storage container shell or at least partially contacts the outer side of the milk storage container shell, and the detection electrode assembly is close to or contacts the outer side of the milk storage container shell.

10. The breast pump of claim 9, wherein, The host shell comprises an inner side close to the inside of the host and an outer side away from the inside of the host; The detection electrode assembly is arranged on the inner side of the host shell.

11. The breast pump of claim 8, wherein, The host further comprises a component arrangement layer and a sensor arrangement layer, and the sensor arrangement layer is arranged between the component arrangement layer and the host shell; The parallel capacitor group is arranged on the sensor arrangement layer.

12. The breast pump of claim 11, wherein, The sensor arrangement layer has an electric shielding effect, and the parallel capacitor group is arranged on the side of the sensor arrangement layer close to the host shell.

13. The breast pump of claim 8, wherein, The host includes a main body extending along the rising direction of the milk liquid surface and a base located below the bottom wall of the milk storage container, and the milk storage container includes a side wall extending along the rising direction of the milk liquid surface and a bottom wall connected to the side wall; the main body contacts or is close to the side wall, and the base contacts or is close to the bottom wall. The milk storage container is installed above the base, and the detection electrode assembly at least includes a set of parallel capacitors arranged on the base.

14. The breast pump of claim 8, wherein, The host includes a main body extending along the rising direction of the milk liquid surface and a base located below the bottom wall of the milk storage container, and the milk storage container includes a side wall extending along the rising direction of the milk liquid surface and a bottom wall connected to the side wall; the main body contacts or is close to the side wall, and the base contacts or is close to the bottom wall. The milk storage container is installed above the base, and the detection electrode assembly at least includes a set of parallel capacitors arranged on the base.

15. The breast pump of claim 8, wherein, The host further includes a bottom wall, and the milk storage container further includes a top wall, and the bottom wall of the host is fixed to the top wall of the milk storage container. The detection electrode assembly at least includes a set of parallel capacitors arranged on the bottom wall of the host.

16. The breast pump of claim 8, wherein, The detection electrode assembly is fixedly arranged on the outer side of the milk storage container housing and is electrically connected to the control circuit arranged on the host.

17. The breast pump of claim 4, wherein, The detection electrode assembly includes a plurality of sets of parallel capacitors arranged oppositely.

18. The breast pump of claim 17, wherein, The detection electrode assembly includes a first parallel capacitor group and a second parallel capacitor group, the first parallel capacitor group is used for measuring a first milk amount range or a first liquid surface height range; and the second parallel capacitor group is used for measuring a second milk amount range or a second liquid surface height range.

19. The breast pump of claim 4, wherein, The differential capacitive sensor assembly at least includes a full-milk detection parallel capacitor group for measuring a full-milk state of the milk storage container. The full-milk detection parallel capacitor group is arranged close to the top of the milk storage container.

20. The breast pump of claim 4, wherein, The differential capacitive sensor assembly at least includes an empty-milk detection parallel capacitor group for measuring an empty-milk state of the milk storage container. The empty-milk detection parallel capacitor group is arranged close to the bottom of the milk storage container.

21. The breast pump of claim 4, wherein, The differential capacitive sensor assembly at least includes a unit height detection parallel capacitor group for detecting a unit height milk liquid detection value. The unit height detection parallel capacitor group is arranged at the bottom of the milk storage container.

22. The breast pump of claim 17, wherein, The plurality of sets of parallel capacitors are at least two groups of milk amount detection parallel capacitor groups, empty-milk detection parallel capacitor groups, empty-milk detection parallel capacitor groups, and unit height detection parallel capacitor groups.

23. The breast pump of claim 1, wherein, The breast pump further includes a breast shield and a host, and the breast shield includes a flange for fitting the breast. The milk storage container is used for receiving and storing the breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield. The host includes a negative pressure mechanism for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

24. A differential capacitive sensor assembly, comprising: The differential capacitive sensor assembly can be detachably installed on the milk storage container of the breast pump and detect the state parameters of the milk storage container.

25. The differential capacitive sensor assembly of claim 24, wherein, The differential capacitive sensor assembly includes a communication port for inserting a connection line to communicate with the breast pump.

26. The differential capacitive sensor assembly of claim 24, wherein, The differential capacitive sensor assembly comprises a wireless communication module for wireless communication with the breast pump.

27. The differential capacitive sensor assembly of claim 24, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; The detection electrode assembly comprises at least a set of oppositely arranged parallel capacitive groups, each of which comprises a first electrode and a second electrode; The control circuit is configured to at least charge the detection electrode assembly and detect the capacitance value of the detection electrode assembly.

28. A breast pump, comprising: The breast pump comprises a milk storage container and three sets of differential capacitive sensor assemblies; The first set of differential capacitive sensor assemblies comprises a first detection electrode assembly arranged at a bottom region in the milk storage container in the direction of the rising milk level in the milk storage container; The second set of differential capacitive sensor assemblies comprises a second detection electrode assembly arranged at a top region in the milk storage container in the direction of the rising milk level in the milk storage container; The third set of differential capacitive sensor assemblies comprises a third detection electrode assembly extending from the bottom region to the top region in the milk storage container in the direction of the rising milk level in the milk storage container.

29. The breast pump of claim 28, wherein, In the direction of the rising milk level in the milk storage container, the height of the bottom of the third detection electrode assembly is lower than or equal to the height of the top of the first detection electrode assembly, and the height of the top of the third detection electrode assembly is higher than or equal to the height of the bottom of the second detection electrode assembly.

30. The breast pump of claim 28, wherein The first set of differential capacitive sensor assemblies is configured to detect a full milk state of the milk storage container; The second set of differential capacitive sensor assemblies is configured to detect at least one of an empty milk state of the milk storage container and a unit height milk level detection value; The third set of differential capacitive sensor assemblies is configured to detect the amount of milk in the milk storage container or the height of the liquid level in the milk storage container.

31. The breast pump of claim 28, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; The detection electrode assembly comprises at least a set of oppositely arranged parallel capacitive groups, each of which comprises a first electrode and a second electrode; The control circuit is configured to at least charge the detection electrode assembly and detect the capacitance value of the detection electrode assembly.

32. The breast pump of claim 30, wherein, The first electrode and the second electrode are parallel plate electrodes.

33. The breast pump of claim 31, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module, and a conversion module; The excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal; The processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly based on the digital signal.

34. The breast pump of claim 28, wherein, The milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side surface in contact with the milk and an outer side surface not in contact with the milk; The first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the outer side surface or close to the outer side surface.

35. The breast pump of claim 34, wherein, The breast pump further comprises a main machine, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the main machine.

36. The breast pump of claim 35, wherein, The main machine comprises a main machine shell, and the first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the main machine shell.

37. The breast pump of claim 35, wherein, The main machine further comprises a component arrangement layer and a sensor arrangement layer, and the sensor arrangement layer is arranged between the component arrangement layer and the main machine shell. The first detection electrode assembly, the second detection electrode assembly, and the third detection electrode assembly are arranged on the sensor arrangement layer.

38. The breast pump of claim 28, wherein, The breast pump further comprises a breast shield and a main machine, and the breast shield comprises a flange for fitting a breast. The milk storage container is used for receiving and storing the breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield. The main machine comprises a negative pressure mechanism for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

39. A breast pump, comprising: The breast pump comprises a milk storage container and three groups of differential capacitive sensor assemblies. The first group of differential capacitive sensor assemblies comprises a first detection electrode assembly, and the first detection electrode assembly is arranged at a top region in a rising direction of a milk liquid level in the milk storage container. The second group of differential capacitive sensor assemblies comprises a second detection electrode assembly, and the second detection electrode assembly is arranged at a bottom region in the rising direction of the milk liquid level in the milk storage container. The third group of differential capacitive sensor assemblies comprises a third detection electrode assembly, and a height of a top of the third detection electrode assembly is lower than a height of the first detection electrode assembly, and a height of a bottom of the third detection electrode assembly is higher than a height of the second detection electrode assembly in the rising direction of the milk liquid level in the milk storage container.

40. The breast pump of claim 39, wherein, The third detection electrode assembly extends from the bottom region to the top region in the rising direction of the milk liquid level.

41. The breast pump according to claim 39, wherein The first group of differential capacitive sensor assemblies are used for detecting a full milk state of the milk storage container. The second group of differential capacitive sensor assemblies are used for detecting at least one of an empty milk state of the milk storage container and a unit height milk liquid detection value. The third group of differential capacitive sensor assemblies are used for detecting a milk amount in the milk storage container or a liquid level height in the milk storage container.

42. The breast pump of claim 39, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit. The detection electrode assembly comprises at least one set of oppositely arranged parallel capacitors, and the parallel capacitors comprise a first electrode and a second electrode. The control circuit is used for at least charging the detection electrode assembly and detecting a capacitance value of the detection electrode assembly.

43. The breast pump of claim 41, wherein, The first electrode and the second electrode are parallel plate electrodes.

44. The breast pump of claim 42, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, the conversion unit comprises an excitation module, a sampling module and a conversion module; The excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal; The processing unit is used for calculating the state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

45. The breast pump of claim 39, wherein, The milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side surface in contact with milk and an outer side surface not in contact with milk; The first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the outer side surface or close to the outer side surface of the outer side surface.

46. The breast pump of claim 45, wherein, The breast pump further comprises a host, and the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the host.

47. The breast pump of claim 46, wherein, The host comprises a host shell, the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the host shell, and the host shell is mounted on the outer side surface of the milk storage container shell or at least partially in contact with the outer side surface of the milk storage container shell, the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are close to or in contact with the outer side surface of the milk storage container shell.

48. The breast pump of claim 46, wherein, The host further comprises a component arrangement layer and a sensor arrangement layer, and the sensor arrangement layer is arranged between the component arrangement layer and the host shell; The first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the sensor arrangement layer.

49. The breast pump of claim 39, wherein, The breast pump further comprises a breast shield and a host, and the breast shield comprises a flange for fitting a breast; The milk storage container is used for receiving and storing breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield; The host comprises a negative pressure mechanism, and the negative pressure mechanism is used for directly or indirectly applying negative pressure to the breast shield to suck breast milk into the milk storage container.

50. A breast pump, comprising: The breast pump comprises a milk storage container and three groups of differential capacitive sensor assemblies; The first group of differential capacitive sensor assemblies comprises a first detection electrode assembly, and the first detection electrode assembly is arranged in a top region in a rising direction of a milk liquid surface in the milk storage container; The second group of differential capacitive sensor assemblies comprises a second detection electrode assembly, and the second detection electrode assembly extends from a bottom region to a middle region in the rising direction of the milk liquid surface in the milk storage container; The third group of differential capacitive sensor assemblies comprises a third detection electrode assembly, and the third detection electrode assembly extends from the middle region to the top region in the rising direction of the milk liquid surface in the milk storage container.

51. The breast pump of claim 50, wherein, In the rising direction of the milk liquid surface, the height of the bottom of the third detection electrode assembly is higher than the height of the top of the second detection electrode assembly.

52. The breast pump according to claim 50, wherein The first group of differential capacitive sensor assemblies are used for detecting a milk full state of the milk storage container; The second set of differential capacitive sensor assemblies are configured to detect milk volume within a first milk volume range or liquid level within a first liquid level range of the milk storage container; The third set of differential capacitive sensor assemblies are configured to detect milk volume within a second milk volume range or liquid level within a second liquid level range of the milk storage container.

53. The breast pump of claim 50, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; The detection electrode assembly comprises at least a set of oppositely arranged parallel capacitive groups, each of which comprises a first electrode and a second electrode; The control circuit is configured to at least charge the detection electrode assembly and detect the capacitance value of the detection electrode assembly.

54. The breast pump of claim 52, wherein, The first electrode and the second electrode are parallel plate electrodes.

55. The breast pump of claim 53, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, the conversion unit comprises an excitation module, a sampling module and a conversion module; The excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts the analog voltage into a digital signal; The processing unit is configured to calculate the state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

56. The breast pump of claim 50, wherein, The milk storage container comprises a milk storage container shell, the milk storage container shell comprises an inner side surface in contact with milk and an outer side surface not in contact with milk; The first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the outer side surface or close to the outer side surface of the outer side surface.

57. The breast pump of claim 56, wherein, The breast pump further comprises a host, and the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the host.

58. The breast pump of claim 57, wherein, The host comprises a host shell, the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the host shell, and the host shell is mounted on the outer side surface of the milk storage container shell or at least partially in contact with the outer side surface of the milk storage container shell, the first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are close to or in contact with the outer side surface of the milk storage container shell.

59. The breast pump of claim 57, wherein, The host further comprises a component arrangement layer and a sensor arrangement layer, and the sensor arrangement layer is arranged between the component arrangement layer and the host shell; The first detection electrode assembly, the second detection electrode assembly and the third detection electrode assembly are arranged on the sensor arrangement layer.

60. The breast pump of claim 50, wherein, The breast pump further comprises a breast shield and a host, and the breast shield comprises a flange for fitting a breast; The milk storage container is configured to receive and store breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield; The host comprises a negative pressure mechanism configured to directly or indirectly apply negative pressure to the breast shield to suck breast milk into the milk storage container.

61. A breast pump, comprising: The breast pump comprises a milk storage container and a capacitive sensor assembly; The milk storage container is configured to store milk; The capacitive sensor assembly is configured to detect a state parameter of the milk storage container, and the capacitive sensor assembly is arranged on an outer side of the milk storage container not in contact with milk.

62. The breast pump of claim 61, wherein, The capacitive sensor assembly is used to detect the empty milk state of the milk storage container and the unit height milk liquid detection value.

63. The breast pump of claim 62, wherein, The capacitive sensor assembly is a differential capacitive sensor assembly.

64. The breast pump of claim 63, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly, and the detection electrode assembly comprises a parallel capacitor group. The parallel capacitor group comprises a first electrode and a second electrode, and the first electrode and the second electrode are parallel plate electrodes.

65. The breast pump of claim 64, wherein, The differential capacitive sensor assembly further comprises a control circuit. The control circuit is used at least for charging the detection electrode assembly and detecting the capacitance value of the detection electrode assembly.

66. The breast pump of claim 62, wherein, The capacitive sensor assembly is detachably fixed to the bottom position of the milk storage container.

67. The breast pump of claim 62, wherein, The breast pump comprises a main machine, and the main machine comprises a main machine shell. In the direction of the rising of the milk liquid surface, the capacitive sensor assembly is detachably fixed to the position close to the bottom of the milk storage container of the main machine shell.

68. The breast pump of claim 62, wherein, The breast pump comprises a main machine, and the main machine comprises a mounting hole; the breast pump further comprises a breast shield, and the breast shield is used for sucking out milk liquid. The breast shield is arranged in the main machine through the mounting hole and is in liquid communication with the milk storage container. The capacitive sensor assembly is arranged at the position close to the mounting hole of the main machine.

69. The breast pump of claim 62, wherein, The breast pump comprises a main machine, and the main machine comprises a main body extending in the direction of the rising of the milk liquid surface and a base located below the bottom wall of the milk storage container; the milk storage container comprises a side wall extending in the direction of the rising of the milk liquid surface and a bottom wall connected to the side wall; the main body contacts or is close to the side wall, and the base contacts or is close to the bottom wall. The milk storage container is arranged above the base, and the capacitive sensor assembly comprises at least one capacitive unit arranged on the base.

70. The breast pump of claim 61, wherein, The milk sucked out by the breast pump flows into the milk storage container from a milk inlet, and the capacitive sensor assembly is correspondingly arranged at the milk inlet position.

71. The breast pump of claim 61, wherein, In the direction of the rising of the milk liquid surface, the capacitive sensor assembly is at least partially arranged below the milk inlet.

72. The breast pump of claim 62, wherein, The breast pump further comprises a capacitive sensor assembly for detecting the milk volume or the liquid surface height.

73. The breast pump of claim 62, wherein, The breast pump further comprises a capacitive sensor assembly for detecting the full milk state.

74. The breast pump of claim 62, wherein, The breast pump further comprises a capacitive sensor assembly for detecting the milk volume or the liquid surface height and a capacitive sensor assembly for detecting the full milk state.

75. The breast pump of claim 62, wherein, The capacitive sensor assembly can be detachably arranged on the milk storage container of the breast pump and detect the state parameters of the milk storage container.

76. The breast pump of claim 61, wherein, The breast pump further comprises a breast shield and a main machine, and the breast shield comprises a flange for abutting against a breast. The milk storage container is used for receiving and storing the breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield. The main machine comprises a negative pressure mechanism for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

77. A breast pump, comprising: The breast pump comprises a milk storage container and a plurality of capacitive sensor assemblies; the milk storage container comprises a milk storage container shell, and the milk storage container shell comprises an inner side surface in contact with milk liquid and an outer side surface not in contact with milk liquid. Each of the plurality of capacitive sensor assemblies comprises a detection electrode assembly, each of the detection electrode assemblies is disposed on or near the outer side of the outer side surface; The plurality of capacitive sensor assemblies are configured to detect different state parameters of the milk storage container.

78. The breast pump of claim 77, wherein, The capacitive sensor assembly is a differential capacitive sensor assembly.

79. The breast pump of claim 78, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit; The detection electrode assembly comprises at least one pair of parallel capacitive plates, each of the pair of parallel capacitive plates comprises a first electrode and a second electrode; The control circuit is configured to charge the detection electrode assembly and detect a capacitance value of the detection electrode assembly.

80. The breast pump of claim 79, wherein, The first electrode and the second electrode are parallel plate electrodes.

81. The breast pump of claim 79, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, the conversion unit comprises an excitation module, a sampling module and a conversion module; The excitation module generates a charging signal to charge the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal; The processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly based on the digital signal.

82. The breast pump of claim 77, wherein, The state parameter of the milk storage container comprises at least one of a milk volume in the milk storage container, a liquid level in the milk storage container, an empty milk state, a milk presence state, a milk full state, and a milk detection value per unit height.

83. The breast pump of claim 82, wherein, The breast pump comprises a plurality of capacitive sensor assemblies for detecting the milk volume in the milk storage container or the liquid level in the milk storage container, and a plurality of capacitive sensor assemblies for detecting the milk full state.

84. The breast pump of claim 82, wherein, The breast pump comprises a plurality of capacitive sensor assemblies for detecting the milk volume in the milk storage container or the liquid level in the milk storage container, and a plurality of capacitive sensor assemblies for detecting the milk detection value per unit height.

85. The breast pump of claim 82, wherein, The breast pump comprises a plurality of capacitive sensor assemblies for detecting the milk volume in the milk storage container or the liquid level in the milk storage container, and a plurality of capacitive sensor assemblies for detecting the empty milk state.

86. The breast pump of claim 82, wherein, The breast pump comprises a plurality of capacitive sensor assemblies for detecting the milk full state, and a plurality of capacitive sensor assemblies for detecting the empty milk state.

87. The breast pump of claim 82, wherein, The breast pump comprises a plurality of capacitive sensor assemblies for detecting the milk full state, and a plurality of capacitive sensor assemblies for detecting the milk detection value per unit height.

88. The breast pump of claim 82, wherein, The breast pump comprises a plurality of capacitive sensor assemblies for detecting different ranges of milk volume in the milk storage container or different ranges of liquid level in the milk storage container.

89. The breast pump of claim 77, wherein, The breast pump further comprises a breast shield and a main machine, the breast shield comprises a flange configured to fit a breast; The milk storage container is configured to receive and store breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield; The main machine comprises a negative pressure mechanism configured to directly or indirectly apply a negative pressure to the breast shield to suck the breast milk into the milk storage container.

90. A breast pump, comprising: The breast pump comprises: a breast shield, a milk storage container, a main machine and a capacitive sensor assembly; The breast shield comprises a flange configured to fit a breast and a nipple receiving portion configured to receive a nipple; The milk storage container is configured to receive and store milk collected by the breast shield, and the milk storage container is in communication with the breast shield. The host includes a negative pressure mechanism configured to directly or indirectly apply negative pressure to the breast shield to draw milk into the milk storage container. The capacitive sensor assembly is configured to detect whether the milk in the milk storage container reaches a position corresponding to a preset full milk level.

91. The breast pump of claim 90, wherein, The capacitive sensor assembly is a differential capacitive sensor assembly.

92. The breast pump of claim 91, wherein, The differential capacitive sensor assembly includes a parallel capacitor group and a control circuit. The parallel capacitor group includes a first electrode and a second electrode arranged opposite to each other. The control circuit is configured to charge the parallel capacitor group and detect a capacitance value of the parallel capacitor group.

93. The breast pump of claim 92, wherein, In a direction in which the milk in the milk storage container rises, a bottom of the first electrode and the second electrode is at a height lower than or equal to a height of the position corresponding to the preset full milk level.

94. The breast pump of claim 92, wherein, At least part of electric field lines between the first electrode and the second electrode pass through the full milk position.

95. The breast pump of claim 92, wherein, The milk storage container includes a milk storage container housing including an inner side in contact with the milk and an outer side not in contact with the milk.

96. The breast pump of claim 95, wherein, The host includes a host housing, the parallel capacitor group is arranged on the host housing, and the host housing is mounted on or at least partially in contact with the outer side of the milk storage container housing, and the parallel capacitor group is close to or in contact with the outer side of the milk storage container housing.

97. The breast pump of claim 96, wherein, The host housing includes an inner side forming an internal receiving space and an outer side opposite to the inner side. The parallel capacitor group is arranged on the inner side of the host housing.

98. The breast pump of any of claims 90-97, wherein, The milk storage container is provided with a milk pouring opening, and in a direction in which the milk in the milk storage container rises, the position corresponding to the preset full milk level is located below the milk pouring opening of the milk storage container.

99. The breast pump of claim 90, wherein, The breast pump further includes an angle sensor. The angle sensor is configured to measure an inclination angle of the breast pump.

100. The breast pump of claim 90, wherein, The breast pump further includes a vibration sensor.

101. A method of determining a fullness state of a breast pump, the method comprising: The method is applied to the breast pump of any one of claims 90-100, and the method includes: obtaining a detection value of the capacitive sensor assembly; in a case where the detection value is greater than a preset detection value, obtaining judgment data; determining whether the judgment data satisfies a true full milk condition; in a case where the judgment data satisfies the true full milk condition, determining that the breast pump is in a true full milk state; in a case where the judgment data does not satisfy the true full milk condition, determining that the breast pump is in a false full milk state.

102. The method of claim 101, wherein, The case where the detection value is greater than the preset detection value includes: in the case where the detection value is greater than the preset detection value, continuously obtaining a subsequent detection value; the determination of whether the judgment data satisfies the true full milk condition includes: the subsequent detection value continuously rises or remains within a preset time, and it is determined that the true full milk condition is satisfied. The subsequent detection value presents a non-continuous rising trend within a preset time, and it is determined that the true milk full condition is not met.

103. The method of claim 102, wherein, The preset time ranges from 0.5s to 3s.

104. The method of claim 102, wherein, The non-continuous rising trend includes one of a rising and then falling trend or a fluctuation trend.

105. The method of claim 101, wherein, The obtaining of the judgment data in the case where the detection value is greater than a preset detection value includes: obtaining an inclination angle detected by an angle sensor; The judgment of whether the judgment data meets the true milk full condition includes: judging whether the breast pump is in an inclined state according to the inclination angle; in the case where the breast pump is not in the inclined state, it is determined that the true milk full condition is met; in the case where the breast pump is in the inclined state, it is determined that the true milk full condition is not met.

106. The method of claim 101, wherein, The obtaining of the judgment data in the case where the detection value is greater than a preset detection value includes: obtaining a vibration amplitude detected by a vibration sensor; The judgment of whether the judgment data meets the true milk full condition includes: judging whether the breast pump is in a shaking state according to the vibration amplitude; in the case where the breast pump is not in the shaking state, it is determined that the true milk full condition is met; in the case where the breast pump is in the shaking state, it is determined that the true milk full condition is not met.

107. The method of claim 105, wherein, The method further includes: in the case where it is determined that the breast pump is in the true milk full state, performing a preset operation; wherein the preset operation includes any one or more of the following: controlling a prompt module in the breast pump to generate milk full prompt information, the prompt module including at least one of a display module, a sound generating module, and a vibration module; sending indication information to a breast pump in communication with the breast pump, the indication information being used to instruct the display module of the breast pump to display the milk full prompt information; controlling the breast pump to stop pumping.

108. The method of claim 101, wherein, The method further includes: in the case where it is determined that the breast pump is in the true milk full state, determining the milk volume of the breast pump according to a milk full position and a mapping relationship, wherein the mapping relationship is used to indicate the corresponding relationship between the milk full position and the milk volume.

109. A fullness state determining device for a breast pump, comprising: The device is applied to the breast pump of any one of claims 90-100, and the device includes: a first obtaining unit configured to obtain a detection value of the capacitive sensor assembly; a second obtaining unit configured to obtain judgment data in the case where the detection value is greater than a preset detection value; a judgment unit configured to judge whether the judgment data meets a true milk full condition; a first determining unit configured to determine that the breast pump is in a true milk full state in the case where the judgment data meets the true milk full condition; a second determining unit configured to determine that the breast pump is in a false milk full state in the case where the judgment data does not meet the true milk full condition.

110. A breast pump, comprising: The breast pump includes: at least one processor; and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the milk full state judgment method of the breast pump according to any one of claims 101-108.

111. A computer readable storage medium, characterized in that, The computer readable storage medium stores an executable program, and the executable program is executed by the processor to realize the milk full state judgment method of the breast pump.

112. A computer program product, characterized in that, The computer readable storage medium stores an executable program, and the executable program is executed by the processor to realize the milk full state judgment method of the breast pump.

113. A breast pump, comprising: The breast pump comprises a milk storage container, a milk volume detection capacitive sensor assembly, a reference capacitive sensor assembly, and a processing unit. The milk storage container is used for storing milk. The milk volume detection capacitive sensor assembly is used for obtaining a first detection value, and the first detection value comprises a milk capacitance detection value of the current milk storage container. The reference capacitive sensor assembly is used for obtaining a second detection value, and the second detection value comprises a unit height milk detection value. The processing unit is used for determining the liquid level or milk volume of the milk storage container according to the first detection value of the milk volume detection capacitive sensor assembly and the second detection value of the reference capacitive sensor assembly.

114. The breast pump of claim 113, wherein, The milk volume detection capacitive sensor assembly and the reference capacitive sensor assembly are differential capacitive sensor assemblies.

115. The breast pump of claim 114, wherein, The differential capacitive sensor assembly comprises a detection electrode assembly and a control circuit. The detection electrode assembly comprises at least a set of oppositely arranged parallel capacitive groups, and each parallel capacitive group comprises a first electrode and a second electrode. The control circuit is used for at least charging the detection electrode assembly and detecting the capacitance value of the detection electrode assembly.

116. The breast pump of claim 115, wherein, The first electrode and the second electrode are parallel plate electrodes.

117. The breast pump of claim 115, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module, and a conversion module. The excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal. The processing unit is used for calculating the state parameter of the corresponding milk storage container of the differential capacitive sensor assembly according to the digital signal.

118. The breast pump of claim 115, wherein, In the direction of the rising of the milk liquid level, the bottom of the parallel capacitive group of the milk volume detection capacitive sensor assembly and the reference capacitive sensor assembly is at the same height, and the top of the parallel capacitive group of the milk volume detection capacitive sensor assembly is higher than the top of the parallel capacitive group of the reference capacitive sensor assembly.

119. The breast pump of claim 115, wherein, In the direction of the rising of the milk liquid level, the bottom of the parallel capacitive group of the milk volume detection capacitive sensor assembly is higher than the top of the parallel capacitive group of the reference capacitive sensor assembly.

120. The breast pump of any one of claims 113 to 119, wherein, The breast pump further comprises a host, and the host comprises a shell.

121. The breast pump of any one of claims 113 to 119, wherein, The milk storage container comprises an outer wall extending in the direction of the rising of the milk liquid level, the shell of the host comprises a part that is attached to the outer wall of the milk storage container, the milk volume detection capacitive sensor assembly is arranged in the part of the shell of the host that is attached to the outer wall of the milk storage container and extends in the direction of the rising of the milk liquid level.

122. The breast pump of claim 121, wherein, The reference capacitive sensor assembly is arranged in the part of the shell of the host that is attached to the outer wall of the milk storage container and is close to the bottom of the milk storage container.

123. The breast pump of any one of claims 113 to 119, wherein, The milk amount detection capacitor sensor assembly includes multiple sets of parallel capacitors for detecting different ranges of liquid level or different ranges of milk amount values, and the multiple sets of parallel capacitors have different height ranges in the direction of the rising of the milk liquid level.

124. The breast pump of claim 113, wherein, The breast pump further includes a breast shield and a main machine, the breast shield includes a flange for fitting the breast; The milk storage container is used for receiving and storing the breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield; The main machine includes a negative pressure mechanism for directly or indirectly applying negative pressure to the breast shield to suck the breast milk into the milk storage container.

125. A breast pump, comprising: The breast pump includes a milk storage container and an empty milk detection sensor assembly. The milk storage container is used for storing milk liquid; The empty milk detection sensor assembly is used for detecting the empty milk state of the milk storage container; wherein the empty milk state includes an empty milk condition and a non-empty milk condition.

126. The breast pump of claim 125, wherein, The breast pump includes a main machine, and the empty milk detection sensor assembly is arranged on the main machine.

127. The breast pump of claim 126, wherein, The main machine includes a main machine shell, and the empty milk detection sensor assembly includes a sensor unit arranged on the main machine shell, the main machine shell is mounted on the outer side of the milk storage container shell or at least partially in contact with the outer side of the milk storage container shell, and the sensor unit is close to or in contact with the outer side of the milk storage container shell.

128. The breast pump of claim 126, wherein, The empty milk detection sensor assembly is an optical sensor assembly, at least part of the area on the milk storage container is a transparent or translucent structure, and the optical sensor assembly detects the empty milk state of the milk storage container through the transparent or translucent structure on the milk storage container.

129. The breast pump of claim 126, wherein, The empty milk detection sensor assembly is a capacitor sensor assembly, the main machine includes a main body extending in the direction of the rising of the milk liquid level, the milk storage container includes a side wall extending in the direction of the rising of the milk liquid level, the main body contacts or is close to the side wall, and the capacitor sensor assembly is arranged in the main body.

130. The breast pump of claim 129, wherein The capacitor sensor assembly includes a capacitor unit, and the capacitor unit is arranged at a position close to the bottom of the milk storage container in the direction of the rising of the milk liquid in the milk storage container.

131. The breast pump of claim 129, wherein, The main machine further includes a mounting hole, the breast pump further includes a breast shield, and the breast shield is used for sucking out milk liquid; The breast shield is arranged in the main machine through the mounting hole; The capacitor sensor assembly includes a capacitor unit, and the capacitor unit is arranged at a position close to the mounting hole of the main body.

132. The breast pump of claim 129, wherein, The main machine further includes a base below the bottom wall of the milk storage container, the milk storage container includes a bottom wall connected to the side wall, and the base contacts or is close to the bottom wall; The capacitor sensor assembly includes a capacitor unit, the milk storage container is arranged above the base, and the capacitor unit is arranged on the base.

133. The breast pump of claim 129, wherein, The main machine includes a component arrangement layer and a sensor arrangement layer; The sensor arrangement layer is arranged between the component arrangement layer and the shell; The capacitor sensor assembly includes a capacitor unit, and the capacitor unit is arranged on the side of the sensor arrangement layer close to the shell.

134. The breast pump of claim 125, wherein, The milk storage container comprises a shell, the shell comprises a bottom wall, and the empty milk detection sensor assembly is arranged on the outer side of the bottom wall or the inner side of the bottom wall.

135. The breast pump of any one of claims 129 to 133, wherein, The capacitive sensor assembly is a differential capacitive sensor assembly.

136. The breast pump of claim 135, wherein, The differential capacitive sensor assembly comprises a control circuit and a detection electrode assembly. The detection electrode assembly comprises at least one set of oppositely arranged parallel capacitors, and each parallel capacitor comprises a first electrode and a second electrode. The control circuit is configured to charge the detection electrode assembly and detect the capacitance of the detection electrode assembly.

137. The breast pump of claim 136, wherein, The first electrode and the second electrode are parallel plate electrodes.

138. The breast pump of claim 136, wherein, The breast pump further comprises a processing unit, the control circuit comprises a conversion unit, and the conversion unit comprises an excitation module, a sampling module, and a conversion module. The excitation module generates a charging signal for charging the detection electrode assembly, the charge on the detection electrode assembly is transmitted to the conversion module through the sampling module, and the conversion module converts an analog voltage into a digital signal. The processing unit is configured to calculate a state parameter of the milk storage container corresponding to the differential capacitive sensor assembly according to the digital signal.

139. The breast pump of claim 125, wherein, The breast pump further comprises a breast shield and a main machine, and the breast shield comprises a flange configured to fit a breast. The milk storage container is configured to receive and store breast milk collected by the breast shield, and the milk storage container is in communication with the breast shield. The main machine comprises a negative pressure mechanism configured to directly or indirectly apply a negative pressure to the breast shield to suck the breast milk into the milk storage container.

140. The breast pump of claim 125, wherein, The milk sucked by the breast pump flows into the milk storage container through a milk inlet, and the empty milk detection sensor assembly is arranged at a milk inlet position of the milk inlet.

141. The breast pump of claim 140, wherein, In a direction in which the milk level rises, the empty milk detection sensor assembly is at least partially arranged below the milk inlet.

142. A method of controlling a breast pump, the method comprising: The method is applied to the breast pump of any one of claims 125-141, and the method comprises: obtaining a detection value of the empty milk detection sensor assembly; in a state in which it is determined according to the detection value that the breast pump is not empty, controlling the breast pump to switch from a first working mode to a second working mode.

143. The method of claim 142, wherein, The control of the breast pump to switch from the first working mode to the second working mode comprises: controlling the breast pump to switch from a mode for stimulating milk secretion to a milk suction mode.

144. The method of claim 143, wherein, The mode for stimulating milk secretion comprises at least one of a simulated sucking function, a hot compress function, a vibration function, a massage function, and an electric stimulation function.

145. The method of claim 142, wherein, The control of the breast pump to switch from the first working mode to the second working mode comprises: controlling the breast pump to switch from a first milk suction mode to a second milk suction mode, and at least one of a milk suction frequency and a milk suction strength in the second milk suction mode is greater than that in the first milk suction mode.

146. A control device for a breast pump, the control device comprising: The device is applied to the breast pump of any one of claims 125-141, and the device comprises: an obtaining unit configured to obtain a detection value of the empty milk detection sensor assembly; a control unit configured to, in a state in which it is determined according to the detection value that the breast pump is not empty, control the breast pump to switch from a first working mode to a second working mode.

147. A breast pump, comprising: The breast pump comprises: at least one processor; and A memory in communication connection with the at least one processor; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the control method of the breast pump according to any one of claims 142 to 145.

148. A computer-readable storage medium, characterized in that, The computer readable storage medium stores an executable program, and the executable program is executed by the processor to implement the control method of the breast pump according to any one of claims 142 to 145.

149. A computer program product, characterized in that, The computer program is executed by the processor to implement the control method of the breast pump according to any one of claims 142 to 145.

150. A method of milk fullness detection for a breast pump, the method comprising: The method comprises: Obtaining detection data of a milk fullness detection sensor; In the case where the detection data meets a preset condition, obtaining judgment data; Judging whether the judgment data meets a true milk fullness condition; In the case where the judgment data meets the true milk fullness condition, determining that the breast pump is in a true milk fullness state; In the case where the judgment data does not meet the true milk fullness condition, determining that the breast pump is in a false milk fullness state.

151. The method of claim 150, wherein, The method comprises: Obtaining detection data of a milk fullness detection sensor; 152. The method of claim 151, wherein, The milk fullness detection sensor comprises at least one of the following sensors: A differential capacitor sensor assembly; A pressure sensor; An ultrasonic sensor; A photoelectric sensor.

153. The method of claim 152, wherein, The milk fullness detection sensor is a differential capacitor sensor assembly, and the differential capacitor sensor assembly comprises a parallel capacitor assembly and a control circuit; The parallel capacitor assembly comprises a first electrode and a second electrode arranged oppositely; The control circuit is configured to charge the parallel capacitor assembly and detect a capacitance value of the parallel capacitor assembly.

154. The method of claim 151, wherein, The detection data is a capacitance detection value, and the method comprises: In the case where the capacitance detection value is greater than a preset capacitance detection value, continuously obtaining a subsequent capacitance detection value; The method comprises: In the case where the subsequent capacitance detection value continuously increases or remains within a preset time, it is judged that the true milk fullness condition is met; In the case where the subsequent capacitance detection value has a non-continuous increasing trend within the preset time, it is judged that the true milk fullness condition is not met.

155. The method of claim 154, wherein, The preset time ranges from 0.5s to 3s.

156. The method of claim 155, wherein, The non-continuous increasing trend comprises one of a decreasing trend or a fluctuating trend after the increase.

157. The method of claim 150, wherein, The method comprises: Obtaining a detection level signal of the milk fullness detection sensor.

158. The method of claim 157, wherein, The milk fullness detection sensor comprises at least one of the following sensors: An inductive capacitor sensor assembly; A photoelectric sensor.

159. The method of claim 157, wherein, The method comprises: In the case where the detection level signal at a first time is a preset level signal, obtaining a plurality of detection level signals from the first time to a second time; wherein the second time is after the first time; The method comprises: In the case where all the plurality of detection level signals are the preset level signal, it is judged that the true milk fullness condition is met; In a case where at least one of the plurality of detection level signals is not the preset level signal, it is determined that the true milk full condition is not met.

160. The method of claim 150, wherein, The obtaining the judgment data in a case where the detection data meets a preset condition comprises: In a case where the detection data meets a preset condition, obtaining an inclination angle detected by an angle sensor; The determining whether the judgment data meets the true milk full condition comprises: Determining whether the breast pump is in an inclined state according to the inclination angle; In a case where the breast pump is not in the inclined state, it is determined that the true milk full condition is met; In a case where the breast pump is in the inclined state, it is determined that the true milk full condition is not met.

161. The method of claim 150, wherein, The obtaining the judgment data in a case where the detection data meets a preset condition comprises: In a case where the detection data meets a preset condition, obtaining a vibration amplitude detected by a vibration sensor; The determining whether the judgment data meets the true milk full condition comprises: Determining whether the breast pump is in a shaking state according to the vibration amplitude; In a case where the breast pump is not in the shaking state, it is determined that the true milk full condition is met; In a case where the breast pump is in the shaking state, it is determined that the true milk full condition is not met.

162. The method of claim 150, wherein, The method further comprises: In a case where it is determined that the breast pump is in the true milk full state, performing a preset operation; wherein The preset operation comprises any one or more of the following: Controlling a prompt module in the breast pump to generate milk full prompt information, the prompt module comprising at least one of a display module, a sound generating module, and a vibration module; Sending indication information to an electronic device in communication with the breast pump, the indication information being used to instruct a display module of the electronic device to display the milk full prompt information; Controlling the breast pump to stop milk pumping.

163. The method of claim 150, wherein, The method further comprises: In a case where it is determined that the breast pump is in the true milk full state, determining a milk amount of the breast pump according to a milk full position and a mapping relationship, wherein the mapping relationship is used to indicate a corresponding relationship between a milk full position and a milk amount.

164. A milk fullness detection device for a breast pump, comprising: The apparatus comprises: A first obtaining unit configured to obtain detection data of the electrode type capacitive sensor assembly; A second obtaining unit configured to obtain judgment data in a case where the detection data meets a preset condition; A determining unit configured to determine whether the judgment data meets a true milk full condition; A first determining unit configured to determine that the breast pump is in a true milk full state in a case where the judgment data meets the true milk full condition; A second determining unit configured to determine that the breast pump is in a false milk full state in a case where the judgment data does not meet the true milk full condition.

165. A breast pump, comprising: The breast pump comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the milk full detection method of the breast pump according to any one of claims 150-163.

166. A computer readable storage medium, characterized in that, The computer readable storage medium stores an executable program, and the executable program is executed by the processor to implement the milk full detection method of the breast pump according to any one of claims 150-163.

167. A computer program product, characterized in that, A computer program comprising computer program instructions which, when executed by a processor, implement a milk fullness detection method for a breast pump as claimed in any of claims 150-163.

Images