Breast pump

Abstract

The invention relates to the technical field of breast pumps, in particular to a breast pump. Comprising a vacuum pump for controllably outputting negative pressure; each milk sucking cup is connected with the vacuum pump through a two-way regulating valve; the pressure relief regulating valve is arranged in the main pipeline and is used for balancing the negative pressure in the whole gas path; and the control unit is connected with the two-way regulating valve and the pressure relief regulating valve and is used for generating suction curves of the milk sucking cups and outputting suction control signals which correspond to the suction curves and are used for respectively controlling the opening degrees of the two-way regulating valve and the pressure relief regulating valve. By arranging the adjusting valve and accurately controlling the opening degree of the adjusting valve, the single vacuum pump can control the suction force of different gears of the milk sucking cups on the multiple sides, the comfort and naturalness of the sucking process are improved, the whole machine is stable and controllable, and the problem that the performance is reduced due to the fact that the vacuum pump is frequently switched on and off and is prone to sparking is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of breast pumps, and in particular to a breast pump. Background Art

[0002] Traditional double breast pumps are used on both breasts, and the host cannot control the suction of the left and right breast shields separately. When adjusting the suction, both sides can only be increased or decreased at the same time, and cannot be controlled separately. In addition, when the double breast pump is used to pump milk from one breast, the unused breast shield on the other side needs to be plugged to avoid leakage. At the same time, when using one side or both sides, the same gear will cause the suction value to be too large when using one side, which is likely to cause breast loss, which has a great impact on the mother's physical experience. And when the single pump is running, the frequent circuit disconnection will easily cause the air pump to spark, resulting in damage or performance degradation.

[0003] The most easily perceived problem is that traditional bilateral breast pumps can only provide the same pumping mode and the same gear for pumping on both breasts, and cannot be adjusted according to the amount of milk on both breasts and the pumping habits, which greatly affects the pumping feeling and the rate of milk secretion. Summary of the invention

[0004] The purpose of the present invention is to provide a breast pump to solve the above technical problems;

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A breast pump, comprising:

[0007] A vacuum pump that can controllably output negative pressure;

[0008] A plurality of breast pump cups, each breast pump cup being connected to the vacuum pump via a two-way regulating valve;

[0009] The pressure relief regulating valve is installed in the main pipeline to balance the negative pressure in the entire gas circuit;

[0010] A control unit is connected to the two-way regulating valve and the pressure relief regulating valve, and is used to generate a suction curve of each breast pump cup, and output a suction control signal corresponding to each suction curve for respectively controlling the opening of the two-way regulating valve and the pressure relief regulating valve.

[0011] Preferably, the breast pump cup comprises a left breast pump cup and a right breast pump cup, the two-way regulating valve comprises a left regulating valve connected to the left breast pump cup and a right regulating valve connected to the right breast pump cup, the control unit is respectively connected to the left regulating valve, the right regulating valve and the pressure relief regulating valve, and outputs the three suction control signals for independently controlling the left regulating valve, the right regulating valve and the pressure relief regulating valve.

[0012] Preferably, the suction curve is a continuous periodic waveform for simulating natural sucking, and each waveform period of the suction curve includes at least a suction stage, a maintenance stage and a release stage. The two-way regulating valve and the pressure relief regulating valve have corresponding openings in the suction stage, the maintenance stage and the release stage, respectively, and the suction stage, the maintenance stage and the release stage are switched sequentially by continuously changing the openings of the two-way regulating valve and the pressure relief regulating valve.

[0013] Preferably, the calculation formula of the suction curve is:

[0014] P(t)=P max ×sin(2πft)+P offset

[0015] Where t represents time, P max represents the maximum suction force, f represents the simulated sucking frequency, P offset Indicates the reference waveform.

[0016] Preferably, a pressure sensor is further included, and the pressure sensor is used to detect the negative pressure value of the breast cup. The control unit is connected to the pressure sensor, and is used to receive the negative pressure value, compare the pressure difference between the negative pressure value and a preset target pressure value, and output the suction control signal according to the pressure difference and the valve response speed to dynamically adjust the opening ratio of the two-way regulating valve and the pressure relief regulating valve.

[0017] Preferably, the vacuum pump is connected to the branch pipes corresponding to the breast pump cups through a main pipe, and the control unit outputs a suction control signal for controlling the opening of the pressure relief regulating valve according to the negative pressure value detected by each pressure sensor, so as to keep the negative pressure in the main pipe balanced with the sum of the pressures of the breast pump cups;

[0018] The control unit is also connected to the vacuum pump and outputs a vacuum pump control signal for controlling the negative pressure frequency and intensity of the vacuum pump.

[0019] Preferably, the control unit also outputs a micro-vibration massage signal for adjusting the opening of the pressure relief regulating valve to generate pressure fluctuations.

[0020] Preferably, the control unit pre-stores a plurality of suction modes, and each of the suction modes is provided with a corresponding suction curve.

[0021] Preferably, it also includes an operating unit connected to the control unit, which is used to collect the pressure gear or operation data selected by the user, dynamically adjust the suction size and duration corresponding to the suction curve according to the pressure gear or operation data, and correspondingly adjust the opening ratio of the two-way regulating valve and the pressure relief regulating valve.

[0022] Preferably, a flow rate sensor is further included, and the flow rate sensor is used to detect the breast milk flow rate value of the breast pump cup. The control unit is connected to the flow rate sensor, and is used to receive the breast milk flow rate value, compare the flow rate difference between the breast milk flow rate value and a preset target flow rate value, and output the suction control signal according to the flow rate difference to dynamically adjust the opening of the two-way regulating valve and the pressure relief regulating valve.

[0023] Beneficial effects of the present invention: Due to the adoption of the above technical scheme, the present invention realizes the control of the suction of multiple-sided breast cups at different gears by a single vacuum pump by setting a regulating valve and accurately controlling the opening of the regulating valve, thereby improving the comfort and naturalness of the sucking process, making the whole machine stable and controllable, and optimizing the problem of frequent switching on and off of the vacuum pump and easy sparking leading to performance degradation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a breast pump according to an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the bilateral structure of a breast pump according to an embodiment of the present invention.

[0026] In the accompanying drawings: 1. vacuum pump; 2. breast pump cup; 21. left breast pump cup; 22. right breast pump cup; 3. two-way regulating valve; 31. left regulating valve; 32. right regulating valve; 4. control unit; 5. pressure sensor; 51. left pressure sensor; 52. right pressure sensor; 6. pressure relief regulating valve; 7. flow rate sensor; 71. left flow rate sensor; 72. right flow rate sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0030] A breast pump, such as Figure 1 , Figure 2 As shown, including

[0031] A vacuum pump 1, which can controllably output negative pressure;

[0032] A plurality of breast pump cups 2, each breast pump cup 2 is connected to a vacuum pump 1 via a two-way regulating valve 3;

[0033] The pressure relief regulating valve 6 is arranged in the main pipeline to balance the negative pressure in the entire gas circuit;

[0034] The control unit 4 is connected to the two-way regulating valve 3 and the pressure relief regulating valve 6, and is used to generate suction curves of each breast pump cup 2, and output suction control signals corresponding to each suction curve for controlling the opening of the two-way regulating valve 3 and the pressure relief regulating valve 6 respectively.

[0035] Specifically, the present invention provides a breast pump, including a single air pump, a main air circuit and multiple branch air circuits, the main air circuit is provided with a pressure relief regulating valve 6, and multiple branch air circuits are respectively provided with two-way regulating valves 3. The main circuit adjusts the negative pressure of the entire air circuit through the pressure relief regulating valve 6, and the branch circuit realizes periodic high-frequency pressure switching between negative pressure and normal pressure through the two-way regulating valve 3 with two-way flow, and the pressure of each branch is independently controlled through a multiple branch linkage control system.

[0036] The core function of the present invention is to control the flow of the fluid passing through the breast pump cup 2 by changing the valve opening of the two-way regulating valve 3 and the pressure relief regulating valve 6. The present invention adopts a single-pump multi-valve system structure, firstly installing a two-way regulating valve 3 in the pipeline of each breast pump cup 2 (negative pressure unit) and installing a pressure relief regulating valve 6 in the main pipeline, adjusting the negative pressure of each breast pump cup 2 by controlling the flow of air flow, and realizing different pressure levels by using the difference in air flow resistance, so as to realize independent suction control of the suction of the breast pump cups 2 on different sides.

[0037] The vacuum pump 1 serves as the negative pressure source of the entire system, operates continuously and provides a stable negative pressure output, and is connected to a number of independent breast pump cups 2. The vacuum pump 1 transmits the negative pressure to each branch through the main pipeline.

[0038] Each breast pump cup 2 is equipped with a two-way regulating valve 3, which is responsible for regulating the negative pressure through the breast pump cup 2. The user can set different gears of suction force of each breast pump cup 2 according to needs.

[0039] When the two-way regulating valve 3 is at a relatively small opening, the suction force is relatively weak; when the two-way regulating valve 3 is at a relatively large opening, the suction force is relatively strong. Through the precise control of the two-way regulating valve 3, the suction force of the breast pump cup 2 on each side can be made different to meet the needs of the user.

[0040] Different from the valve "on / off" operation in traditional technology, the present application realizes a high-precision breast pump control mode that simulates natural sucking by finely adjusting the opening of the two-way regulating valve 3 and the pressure relief regulating valve 6, especially in the precise control of dynamic negative pressure balance and different sucking frequencies.

[0041] In a preferred embodiment, Figure 2 As shown, the breast pump cup 2 includes a left breast pump cup 21 and a right breast pump cup 22, the two-way regulating valve 3 includes a left regulating valve 31 connected to the left breast pump cup 21 and a right regulating valve 32 connected to the right breast pump cup 22, and the control unit 4 is respectively connected to the left regulating valve 31, the right regulating valve 32 and the pressure relief regulating valve 6, and outputs three suction control signals for independently controlling the left regulating valve 31, the right regulating valve 32 and the pressure relief regulating valve 6.

[0042] Specifically, in order to achieve dynamic changes in negative pressure of the breast pump, the present invention installs two-way regulating valves 3 in the pipelines of the breast pump cups 2 on both sides as a pressure relief circuit for deflation balance. Therefore, the present invention achieves the control of suction forces of different gears on both sides with a single vacuum pump 1, and also improves the comfort and naturalness of the sucking process. Not only does it simplify the structure of the device, but it also reduces the manufacturing cost.

[0043] The regulating valve in the present invention includes a left regulating valve 31, a right regulating valve 32 and a pressure relief regulating valve 6. The pressure relief regulating valve 6 on the main pipeline is connected to the external atmospheric pressure, and controls the air pressure on the main air path to realize the function of negative pressure relief. The control unit 4 of the present invention is respectively connected to the left regulating valve 31, the right regulating valve 32 and the pressure relief regulating valve 6, and outputs three suction control signals for independently controlling the left regulating valve 31, the right regulating valve 32 and the pressure relief regulating valve 6, respectively, to realize differential suction adjustment of the negative pressure units on the left and right sides. The three suction control signals for independently controlling the corresponding valve openings can be freely combined, so it is more flexible, comfortable and stable than the independent control realized by the traditional three-way valve using high-frequency switching.

[0044] More specifically, during use, the vacuum pump 1 works continuously to ensure the stability of the suction source, making the use of the entire machine more stable and controllable, and also optimizing the problems of frequent switching on and off of the vacuum pump / air pump, easy sparking and resulting in performance degradation in the prior art.

[0045] The breast pump of the present invention can be controlled individually whether it is used on one side or on both sides, and the suction force can be accurately controlled, thereby improving the stability of the sucking force during the breast pumping process and improving the comfort and physical sensation during use.

[0046] In a preferred embodiment, the suction curve is a continuous periodic waveform for simulating natural sucking, and each waveform period of the suction curve includes at least a suction stage, a maintenance stage, and a release stage. The two-way regulating valve 3 and the pressure relief regulating valve 6 have corresponding openings in the suction stage, the maintenance stage, and the release stage, respectively. The suction stage, the maintenance stage, and the release stage are switched sequentially by continuously changing the openings of the two-way regulating valve 3 and the pressure relief regulating valve 6.

[0047] Specifically, the present invention uses the variable frequency control of the unilateral two-way regulating valve 3 to achieve the regulation of the unilateral breast pump 2, the vacuum pump 1 runs continuously and provides a stable negative pressure output, the air flow entering the unilateral breast pump 2 is adjusted by the unilateral two-way regulating valve 3, the suction of the breast pump 2 at different gears is achieved, and the negative pressure change in the pipeline is monitored by the set pressure sensor 5. During the sucking process, the two-way regulating valve 3 in the pipeline is dynamically opened and closed to balance the negative pressure of the pipeline, so as to achieve the regulation of the negative pressure release rhythm, so that the suction of the milk cup returns to normal pressure, and simulates the natural sucking rhythm of the baby.

[0048] In the present invention, a two-way regulating valve 3 with two-way flow is used in the branch pipeline of the breast cup 2, which is a linkage control of multiple branches, rather than a system structure controlled by a single valve in the prior art; the breast pump in the present invention is a negative pressure-normal pressure cycle, and in order to simulate the natural sucking process of the baby, the negative pressure system of the breast pump follows a specific suction curve (waveform), including three stages of suction, maintenance and release.

[0049] The present invention controls the two-way regulating valves 3 of multiple branches to achieve large-range and high-frequency pressure switching of each branch, that is, high-frequency pressure switching within the range of 0 mmHg to 300 mmHg. Based on the control method provided by the present invention, the effect of controlling different pressures of each branch can be achieved.

[0050] In a preferred embodiment, the calculation formula of the suction curve is:

[0051] P(t)=P max ×sin(2πft)+P offset

[0052] Where t represents time, P max represents the maximum suction force, f represents the simulated sucking frequency, P offset Indicates the reference waveform.

[0053] Specifically, in order to simulate the natural sucking process of a baby, the negative pressure system of a breast pump usually follows a specific suction curve (waveform), including three stages of suction, maintenance, and release.

[0054] The suction curve simulates the actual rhythm of a baby's sucking, such as following a "suck-stop-suck" rhythm. Use a periodic function, such as a sine wave or a custom suction curve to generate a pressure change pattern. The suction waveform formula can be set to:

[0055] P(t)=P max ×sin(2πft)+P offset

[0056] Where t represents time, P max represents the maximum suction force, f represents the simulated sucking frequency, P offset Indicates the reference waveform.

[0057] In a specific application, a periodic sinusoidal wave signal is first generated in the device through a signal generator, and the generated signal is converted into an actual output for controlling the suction force and valve opening of the vacuum pump 1. The maximum suction force P in the suction force waveform formula is max , sucking frequency f and reference waveform P offset Both can be adjusted, the maximum suction force P max The corresponding maximum value of the suction force is adjusted, the sucking frequency f corresponds to different sucking rhythms, and the reference waveform P offset The base pressure can be adjusted to suit different comfort needs.

[0058] The suction curve dynamically adjusts the opening of the three regulating valves through the pressure data fed back by the sensor in real time and the pressure range set by the user operation unit, ensuring that the pressure of the breast pump cups 2 on both sides is kept within the corresponding gear range in each cycle, and realizing independent adjustment and optimization of the breast pump cups 2 on both sides. At the same time, the suction curve is designed in each stage. For example, in order to reduce the excessive pulling feeling of the nipple, when the suction force rises in the suction stage, the software divides the rise into six stages and gradually increases, and in the release stage, the software controls the suction force to slowly decrease. In different gear modes, the suction curve automatically optimizes the suction force and frequency in each stage.

[0059] In a preferred embodiment, a pressure sensor 5 is further included, and the pressure sensor 5 is used to detect the negative pressure value of the breast pump cup 2. The control unit 4 is connected to the pressure sensor 5 and is used to receive the negative pressure value, compare the pressure difference between the negative pressure value and a preset target pressure value, and output a suction control signal according to the pressure difference and the valve response speed to dynamically adjust the opening ratio of the two-way regulating valve 3 and the pressure relief regulating valve 6.

[0060] Traditional unilateral or bilateral breast pumps do not have pressure sensing control, and basically achieve a certain suction force by controlling the suction time and frequency of the vacuum pump 1. However, due to the difference in parameters of the vacuum pump 1 and the length of use, the suction force may be unstable. Frequent circuit switching of the vacuum pump 1 may also easily cause the air pump to spark, resulting in performance degradation or damage. The present invention controls the opening of multiple bidirectional regulating valves 3 after pressure detection of each branch, realizes different pressure control of each branch, uses a pressure sensor 5 to collect information to control the bidirectional regulating valve 3 to achieve dynamic negative pressure balance, and the pressure sensor 5 is used to monitor the negative pressure changes in the branch. The pipeline is equipped with a bidirectional regulating valve 3, which is responsible for periodically and dynamically switching the state between the sucking negative pressure and the normal pressure. During the sucking process, the bidirectional regulating valve 3 opens and closes dynamically to balance the negative pressure of the pipeline, realizes the regulation of the negative pressure release rhythm, and makes the suction of the breast cup 2 return to normal pressure, simulating the natural sucking rhythm of the baby. Different sucking frequencies can also be set for each breast cup 2 to adapt to different states of the breast.

[0061] Specifically, the pressure sensor 5 includes a left pressure sensor 51 connected to the left breast cup 21 and a right pressure sensor 52 connected to the right breast cup 22. The control unit 4 controls the operation of the left regulating valve 31 according to the information of the left pressure sensor 51, and the control unit 4 controls the operation of the right regulating valve 32 according to the information of the right pressure sensor 52. The control unit 4 controls the flow ratio of the two-way regulating valve 3 in the main line according to the information of the left pressure sensor 51 and the right pressure sensor 52 to balance the total pressure on both sides. The control unit 4 then controls the operation of the vacuum pump 1 according to the gear setting information, and at the same time takes into account the time consideration of the valve response speed.

[0062] Specifically, the present invention uses a pressure sensor 5 to detect the unilateral negative pressure value in real time, and adjusts the valve opening according to the difference between the actual pressure and the required suction force (set value) through a proportional-integral-differential (PID) control algorithm, and distributes the pressure ratio in the system pipeline to match the set suction force curve. The present invention can adaptively adjust the suction force mode according to the use process, provide a personalized use experience, and optimize milk secretion.

[0063] PID control can adjust the system response speed, stability and smoothness of suction, so that the suction curve is as close to the preset waveform as possible. The precisely controlled valve adjustment of the present invention can ensure a smooth pressure transition and minimize discomfort.

[0064] In a preferred embodiment, the vacuum pump 1 is connected to the branch pipes corresponding to the breast pump cups 2 through the main pipe, and the control unit 4 outputs a suction control signal for controlling the opening of the pressure relief regulating valve 6 according to the negative pressure value detected by each pressure sensor 5, so as to keep the negative pressure in the main pipe balanced with the sum of the pressures of the breast pump cups 2; the negative pressure intensity is periodically changed during the breastfeeding process to achieve a dynamic balance of the negative pressure and simulate the natural sucking of the baby.

[0065] The control unit 4 is also connected to the vacuum pump 1 and outputs a vacuum pump 1 control signal for controlling the negative pressure frequency and intensity of the vacuum pump 1 .

[0066] The vacuum pump 1 of the present invention is controlled by a control unit 4. The control unit 4 in the present invention is controlled by an electrical signal. The suction control signal and the control signal of the vacuum pump 1 are both pulse electrical signals. Taking the double-sided breast pump 2 as an example, the control unit 4 controls the opening of the left regulating valve 31 through a first suction control signal, thereby controlling the suction of the left breast pump 21; the control unit 4 controls the opening of the right regulating valve 32 through a second suction control signal, thereby controlling the suction of the right breast pump 22.

[0067] The electronic control unit also controls the operation of the corresponding two-way regulating valve 3 according to the information of the pressure sensors 5 on the left and right sides, and controls the operation of the vacuum pump 1 according to the gear setting information. There are two ways of controlling the negative pressure of the main pipeline in the present invention. The vacuum pump 1 can be directly connected to control the negative pressure frequency and intensity of the vacuum pump 1 so that it corresponds to the set gear mode. The pressure relief regulating valve 6 in the main pipeline can also be controlled so that the negative pressure value of the main pipeline meets the sum of the required negative pressure values ​​of each branch pipeline, thereby ensuring the negative pressure balance of each branch pipeline.

[0068] In a preferred embodiment, the control unit 4 also outputs a micro-vibration massage signal for adjusting the opening of the pressure relief regulating valve 6 to generate pressure fluctuations.

[0069] Specifically, it is common on the market to generate periodic negative pressure fluctuations by quickly starting and stopping the vacuum pump 1, and to create a similar micro-vibration effect by controlling the working frequency and time of the air pump. The present invention uses a two-way regulating valve 3 to maintain pressure in the main pipeline, and to control the opening of the pressure relief regulating valve 6 by outputting a micro-vibration massage signal to adjust the preset amount, thereby slightly adjusting the opening of the main road's air relief valve to create fluctuations to achieve a micro-vibration massage function. The tiny pressure changes caused by the fluctuations will be transmitted to the breast contact area to simulate the massage effect; preferably, the present invention realizes vibration massage through air pressure changes, which can avoid the mechanical wear caused by high-frequency start and stop of traditional motors.

[0070] By slightly adjusting the opening of the pressure relief regulating valve 6 to create fluctuations, a more comfortable and natural breast pumping experience can be provided, thereby promoting milk secretion.

[0071] In a preferred embodiment, the control unit 4 pre-stores a plurality of suction modes, and each suction mode is provided with a corresponding suction curve.

[0072] The present invention has an adaptive suction adjustment function based on real-time sensor feedback, and can automatically adjust the output suction strength according to the pressure gear data set by the user operation unit.

[0073] Specifically, the present invention automatically adjusts the suction frequency and intensity according to the mode set by the user, such as massage mode, stimulation mode, milk suction mode, lactation mode, mixed mode, etc. Different target negative pressure curves are set in different modes to adjust the time ratio of the suction phase, maintenance phase, and release phase in each cycle.

[0074] In a preferred embodiment, it also includes an operating unit connected to the control unit 4, which is used to collect the pressure gear or operation data selected by the user, dynamically adjust the suction size and duration corresponding to the suction curve according to the pressure gear or operation data, and adjust the opening ratio of the two-way regulating valve 3 and the pressure relief regulating valve 6 accordingly.

[0075] Specifically, the present invention adjusts the PID parameters according to the user's real-time gear selection or operation data, thereby achieving fine control of the valve opening of the two-way regulating valve 3. Ensure that the suction pressure can be accurately adjusted to any level between the minimum and maximum set points. Since traditional suction adjustment usually adopts a preset suction level (such as 5-gear, 9-gear and other suction gears), the valve of the two-way regulating valve 3 of the present invention can be adjusted by small steps to achieve a smooth transition between different suction levels. The user can directly control the control unit 4 to control the suction size of any side suction breast cup 2. The present invention allows adaptation to personal needs, such as setting different suction strengths for each breast, thereby solving problems such as user sensitivity or uneven milk supply; ensuring precise control of suction and dynamically adapting to user needs.

[0076] In a preferred embodiment, a flow rate sensor 7 is further included, and the flow rate sensor 7 is used to detect the breast milk flow rate value of the breast pump cup 2. The control unit 4 is connected to the flow rate sensor 7, and is used to receive the breast milk flow rate value, compare the flow rate difference between the breast milk flow rate value and a preset target flow rate value, and output a suction control signal according to the flow rate difference to dynamically adjust the opening of the two-way regulating valve 3 and the pressure relief regulating valve.

[0077] Specifically, the flow rate sensor 7 includes a left flow rate sensor 71 connected to the left breast pump cup 21 and a right flow rate sensor 72 connected to the right breast pump cup 22. The flow rate sensor 7 senses the breast milk flow rate in real time. The present invention can adjust the suction force according to the change of the breast milk flow rate. For example, when it is detected that the breast milk flow rate is reduced, the suction strength can be appropriately increased or the release time can be shortened to promote milk secretion.

[0078] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A breast pump, characterized in that: include, A vacuum pump (1) is configured to controllably output negative pressure; A plurality of breast pump cups (2), each breast pump cup (2) being connected to the vacuum pump (1) via a two-way regulating valve (3); A pressure relief regulating valve (6) is arranged in the main pipeline and is used to balance the negative pressure in the entire gas path; A control unit (4) is connected to the two-way regulating valve (3) and the pressure relief regulating valve (6), and is used to generate a suction curve for each of the breast pump cups (2), and output a suction control signal corresponding to each of the suction curves for respectively controlling the opening of the two-way regulating valve (3) and the pressure relief regulating valve (6).

2. The breast pump according to claim 1, characterized in that: The breast pump cup (2) comprises a left breast pump cup (21) and a right breast pump cup (22); the two-way regulating valve (3) comprises a left regulating valve (31) connected to the left breast pump cup (21) and a right regulating valve (32) connected to the right breast pump cup (22); the control unit (4) is respectively connected to the left regulating valve (31), the right regulating valve (32) and the pressure relief regulating valve (6), and outputs three suction control signals for respectively and independently controlling the left regulating valve (31), the right regulating valve (32) and the pressure relief regulating valve (6).

3. The breast pump according to claim 1, characterized in that: The suction curve is a continuous periodic waveform for simulating natural sucking. Each waveform cycle of the suction curve at least includes an intake phase, a maintenance phase and a release phase. The two-way regulating valve (3) and the pressure relief regulating valve (6) have corresponding openings in the intake phase, the maintenance phase and the release phase respectively. The intake phase, the maintenance phase and the release phase are switched sequentially by continuously changing the openings of the two-way regulating valve (3) and the pressure relief regulating valve (6).

4. The breast pump according to claim 1, characterized in that: The calculation formula of the suction curve is: P(t)=P max ×sin(2πft)+P offset Where t represents time, P max represents the maximum suction force, f represents the simulated sucking frequency, P offset Indicates the reference waveform.

5. The breast pump according to claim 1, characterized in that: The invention also comprises a pressure sensor (5), wherein the pressure sensor (5) is used to detect the negative pressure value of the breast pump cup (2); the control unit (4) is connected to the pressure sensor (5) and is used to receive the negative pressure value, compare the pressure difference between the negative pressure value and a preset target pressure value, and output the suction control signal according to the pressure difference and the valve response speed to dynamically adjust the opening ratio of the two-way regulating valve (3) and the pressure relief regulating valve (6).

6. The breast pump according to claim 5, characterized in that The vacuum pump (1) is connected to the branch pipes corresponding to the breast pump cups (2) through a main pipe, and the control unit (4) outputs the suction control signal for controlling the opening of the pressure relief regulating valve (6) according to the negative pressure value detected by each pressure sensor (5), so as to keep the negative pressure in the main pipe balanced with the sum of the pressures of the breast pump cups (2); The control unit (4) is also connected to the vacuum pump (1) and outputs a vacuum pump (1) control signal for controlling the frequency and intensity of negative pressure of the vacuum pump (1).

7. The breast pump according to claim 6, characterized in that The control unit (4) also outputs a micro-vibration massage signal for adjusting the opening of the pressure relief regulating valve (6) to generate pressure fluctuations.

8. The breast pump according to claim 1, characterized in that: The control unit (4) pre-stores a plurality of suction modes, and each of the suction modes is provided with a corresponding suction curve.

9. The breast pump according to claim 1, characterized in that: It also includes an operating unit connected to the control unit (4) and used to collect the pressure gear or operation data selected by the user, dynamically adjust the suction size and duration corresponding to the suction curve according to the pressure gear or operation data, and correspondingly adjust the opening ratio of the two-way regulating valve (3) and the pressure relief regulating valve (6).

10. The breast pump according to claim 1, characterized in that: The invention also comprises a flow rate sensor (7) for detecting the breast milk flow rate value of the breast pump cup (2); the control unit (4) is connected to the flow rate sensor (7) for receiving the breast milk flow rate value, comparing the flow rate difference between the breast milk flow rate value and a preset target flow rate value, and outputting the suction control signal according to the flow rate difference to dynamically adjust the opening of the two-way regulating valve (3) and the pressure relief regulating valve.

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