Electromagnetic powered diaphragm pump

Abstract

This application relates to the field of diaphragm pump technology, and discloses a diaphragm pump based on electromagnetic power. The diaphragm pump includes a pump body, an electromagnet assembly, and an elastic assembly. The pump body has a liquid storage chamber and an inlet and an outlet communicating with the liquid storage chamber. It is equipped with a diaphragm for deforming the liquid storage chamber and an opening / closing assembly for closing one of the inlet and outlet while opening the other when the liquid storage chamber deforms. The electromagnet assembly is connected to the diaphragm and, when energized, drives the diaphragm to expand the liquid storage chamber, so that the opening / closing assembly opens the inlet and closes the outlet when the liquid storage chamber expands. The elastic assembly abuts against the electromagnet assembly and, when the electromagnet assembly is de-energized, presses against the electromagnet assembly, causing the electromagnet assembly to drive the diaphragm to compress the liquid storage chamber, so that the opening / closing assembly closes the inlet and opens the outlet when the liquid storage chamber is compressed. The embodiments of this application can improve the driving accuracy, driving response speed, and stability when driving the diaphragm pump.

Description

Technical Field

[0001] This application relates to the field of diaphragm pump technology, and in particular to a diaphragm pump based on electromagnetic power. Background Technology

[0002] In the field of diaphragm pump power sources, permanent magnet motors are widely used due to their certain advantages. However, permanent magnet motors have significant drawbacks, including slow response speed, susceptibility to environmental factors, and low control precision. In precision medical scenarios where extremely high accuracy is required, they are unable to meet the precise control needs. Summary of the Invention

[0003] The purpose of this application is to provide a diaphragm pump based on electromagnetic power, which aims to improve the driving accuracy, driving response speed and stability when driving the diaphragm pump.

[0004] This application provides an embodiment of a diaphragm pump based on electromagnetic power, comprising:

[0005] The pump body has a liquid storage chamber and an inlet and an outlet communicating with the liquid storage chamber. It is equipped with a diaphragm for deforming the liquid storage chamber and an opening and closing assembly for closing one of the inlet and the outlet and opening the other when the liquid storage chamber is deformed.

[0006] An electromagnet assembly, connected to the diaphragm, drives the diaphragm to expand the liquid storage chamber when powered on, so that the opening and closing assembly opens the liquid inlet and closes the liquid outlet when the liquid storage chamber is expanded.

[0007] An elastic component abuts against the electromagnet component and presses against the electromagnet component when the electromagnet component is energized, causing the electromagnet component to drive the diaphragm to compress the liquid storage chamber, so that the opening and closing component closes the liquid inlet and opens the liquid outlet when the liquid storage chamber is compressed.

[0008] In some embodiments, the electromagnetically powered diaphragm pump further includes:

[0009] The flow detection module is used to collect the flow information of the liquid outlet and obtain the flow detection parameters;

[0010] The control module, electrically connected to the electromagnet assembly, is used to periodically power on the electromagnet assembly in response to a received flow setting operation, based on the flow target parameters corresponding to the flow setting operation and the flow detection parameters, so that the electromagnet assembly drives the diaphragm to alternately expand and compress the liquid storage chamber under the action of electromagnetic induction and the elastic potential energy of the elastic component.

[0011] In some embodiments, the step of periodically powering on the electromagnet assembly based on the flow target parameter corresponding to the flow setting operation and the flow detection parameter includes:

[0012] Power on the electromagnet assembly and then power it off after a preset time;

[0013] After the electromagnet assembly is powered off, the current flow accumulation parameter is determined; the flow accumulation parameter is the accumulated value of the flow detection parameter since the response to the flow setting operation.

[0014] Determine whether the accumulated traffic parameter has reached the target traffic parameter;

[0015] If the desired result is not achieved, return to the step of powering on the electromagnet assembly and then powering it off after a preset time.

[0016] If this is achieved, the electromagnet assembly will remain powered down.

[0017] In some embodiments, the electromagnetically powered diaphragm pump further includes:

[0018] The viscosity detection module is used to collect the liquid viscosity information at the inlet and obtain viscosity detection parameters;

[0019] The control module is also used to keep the electromagnet assembly in a powered-off state when the viscosity detection parameter exceeds the viscosity threshold parameter or the flow target parameter exceeds the flow threshold parameter.

[0020] In some embodiments, the electromagnetically powered diaphragm pump further includes:

[0021] The temperature detection module is used to collect the temperature information of both the liquid inlet and the liquid outlet and obtain the corresponding temperature detection parameters.

[0022] The control module is also used to keep the electromagnet assembly in a powered-off state when the temperature detection parameter exceeds the temperature threshold parameter.

[0023] In some embodiments, the control module is further configured to limit the current of the electromagnet component, such that the actual peak current of the electromagnet component during the startup phase is lower than the peak current before current limiting, and that the current value of the electromagnet component during the stabilization phase decreases in a step-like manner.

[0024] In some embodiments, the control module is further configured to control the power-on and power-off frequency of the electromagnet assembly, so that the flow rate of the liquid in the storage chamber changes positively correlated with the power-on and power-off frequency of the electromagnet assembly.

[0025] In some embodiments, the opening / closing component includes:

[0026] The valve body is fixed in the pump body and forms the liquid storage chamber with the diaphragm. It also forms a temporary storage chamber that communicates with the liquid outlet and has a first channel that communicates with the liquid inlet and the liquid storage chamber and a second channel that communicates with the temporary storage chamber and the liquid storage chamber.

[0027] A first valve plate is disposed between the liquid inlet and the valve body, which connects the liquid inlet and the first channel when the liquid storage chamber is expanded, and blocks the liquid inlet when the liquid storage chamber is compressed.

[0028] The second valve plate is disposed between the liquid outlet and the valve body, which connects the liquid outlet and the temporary storage chamber when the liquid storage chamber is expanded, and connects the second channel and the temporary storage chamber when the liquid storage chamber is compressed.

[0029] In some embodiments, the electromagnet assembly includes:

[0030] The moving iron core is connected to the diaphragm;

[0031] A fixed iron core is connected to the side of the moving iron core away from the diaphragm via the elastic component;

[0032] An electromagnetic coil is disposed around the periphery of the moving iron core. When energized, it generates an electromagnetic magnetic field, which magnetizes the moving iron core and causes it to move closer to the stationary iron core.

[0033] In some embodiments, the pump body has a cleaning channel that extends from the pump body to the liquid storage chamber.

[0034] The beneficial effects of this application are as follows: Instead of using a permanent magnet motor as a power source, it employs a power source that combines electromagnetic drive and elastic reset. The diaphragm pump is driven by the synergistic action of the elastic and electromagnet components, retaining the fast response characteristics of adjustable electromagnetic field strength while achieving precise reset through mechanical energy storage. This avoids the susceptibility of permanent magnets to environmental temperature fluctuations, ensuring a constant displacement during each pumping stroke and effectively eliminating the idle stroke error caused by gear backlash in traditional permanent magnet motors. Furthermore, the direct linkage mechanism between the opening / closing components and the deformation of the storage chamber avoids flow control lag caused by external sensor signal delays, improving the driving accuracy, response speed, and stability when driving the diaphragm pump. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a diaphragm pump based on electromagnetic power provided in an embodiment of this application.

[0036] Figure 2 This is a schematic diagram of the liquid suction of a diaphragm pump based on electromagnetic power provided in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram of the discharge of a diaphragm pump based on electromagnetic power provided in an embodiment of this application.

[0038] Figure 4 This is a flowchart of a method for periodically powering on an electromagnet assembly, as provided in an embodiment of this application.

[0039] Figure 5 This is a current curve diagram for limiting the current of an electromagnet assembly provided in an embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and drawings are used to distinguish similar objects and are not used to describe a specific order or sequence.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0043] See Figures 1 to 3 In some embodiments, the electromagnetically powered diaphragm pump includes a pump body 10, an electromagnet assembly 20, and an elastic assembly 30, both of which are disposed within the pump body 10.

[0044] The pump body 10 has a liquid storage chamber 11 and an inlet 12 and an outlet 13 communicating with the liquid storage chamber 11. The pump body 10 is equipped with a diaphragm 14 for deforming the liquid storage chamber 11 and an opening / closing assembly 40 for closing one of the inlet 12 and the outlet 13 and opening the other when the liquid storage chamber 11 deforms. The liquid storage chamber 11 is a variable-volume cavity within the pump body 10 for temporarily storing liquid, which can be formed by the diaphragm 14. The volume of the liquid storage chamber 11 can be changed by deformation. The opening / closing assembly 40 is a valve structure that switches the flow channel on and off according to the direction of deformation of the liquid storage chamber 11. It can be implemented by a one-way valve plate group. When the liquid storage chamber 11 expands, the valve plate of the inlet 12 opens and the valve plate of the outlet 13 closes. The opposite action occurs when the liquid storage chamber 11 is compressed. In practical applications, the liquid storage chamber 11 can be deformed by adjusting the position of the diaphragm 14. When the liquid storage chamber 11 is unfolded, the opening and closing component 40 opens the inlet 12 and closes the outlet 13. Under negative pressure, the external liquid enters the liquid storage chamber 11 from the inlet 12. When the liquid storage chamber 11 is compressed, the opening and closing component 40 closes the inlet 12 and opens the outlet 13. Under pressure, the liquid in the liquid storage chamber 11 is discharged from the outlet 13 to the outside of the liquid storage chamber 11.

[0045] The electromagnet assembly 20 is connected to the diaphragm 14. When energized, the electromagnet assembly 20 drives the diaphragm 14 to expand the liquid storage chamber 11, so that the opening and closing assembly 40 opens the inlet 12 and closes the outlet 13 when the liquid storage chamber 11 is expanded. The electromagnet assembly 20 is a driving device that generates mechanical displacement through electromagnetic induction. Specifically, it can adopt a combination structure of an iron core and an electromagnetic coil 23. The iron core generates axial displacement under the action of a magnetic field. In practical applications, the electromagnet assembly 20 is periodically energized and de-energized. When energized, the electromagnet assembly 20 generates electromagnetic induction and drives the diaphragm 14 to move in the direction of expanding the liquid storage chamber 11, so that the diaphragm 14 expands the liquid storage chamber 11. When the liquid storage chamber 11 is expanded, the opening and closing assembly 40 opens the inlet 12 and closes the outlet 13, and the external liquid enters the liquid storage chamber 11 from the inlet 12 under negative pressure.

[0046] The elastic component 30 abuts against the electromagnet component 20. When the electromagnet component 20 is de-energized, the elastic component 30 presses against the electromagnet component 20, causing the electromagnet component 20 to drive the diaphragm 14 to compress the liquid storage chamber 11. This causes the opening and closing component 40 to close the inlet 12 and open the outlet 13 when the liquid storage chamber 11 is compressed. The elastic component 30 is a mechanical structure that provides a restoring elastic force. Specifically, it can be a helical spring or a disc spring. When the electromagnet component 20 is de-energized, it releases the stored elastic potential energy, causing the electromagnet component 20 to reset. In practical applications, the elastic component 30 continuously applies an elastic force to the electromagnet component 20 in the direction of compressing the liquid storage chamber 11. When the electromagnet component 20 is powered on, it overcomes the elastic force and drives the diaphragm 14 to expand the liquid storage chamber 11. When the electromagnet component 20 is powered off, it drives the diaphragm 14 to move in the direction of compressing the liquid storage chamber 11 under the action of the elastic force, so that the diaphragm 14 compresses the liquid storage chamber 11. When the liquid storage chamber 11 is compressed, the opening and closing component 40 closes the inlet 12 and opens the outlet 13, and the liquid in the liquid storage chamber 11 is discharged from the outlet 13 to the outside of the liquid storage chamber 11.

[0047] In practical applications, the inlet 12 is connected to an external liquid supply source, and the outlet 13 is connected to an external liquid demand source. A diaphragm pump based on electromagnetic power pumps the corresponding flow rate of liquid from the supply source to the demand source. Specifically, by periodically energizing and de-energizing the electromagnet assembly 20, the liquid storage chamber 11 is periodically expanded and compressed. This allows the liquid from the supply source to enter the storage chamber 11 from the inlet 12 when the storage chamber 11 is expanded, and the liquid in the storage chamber 11 is discharged from the outlet 13 to the demand source when the storage chamber 11 is compressed. When the electromagnet assembly 20 is energized, the actuating component within it is displaced by the magnetic field towards the expansion of the liquid storage chamber 11, causing the diaphragm 14 to expand the chamber. At this time, a negative pressure is created inside the liquid storage chamber 11. Under this negative pressure, the opening / closing assembly 40 opens the inlet 12 and closes the outlet 13 due to the pressure difference, allowing the liquid from the supply source to enter the liquid storage chamber 11 through the inlet 12. When the electromagnet assembly 20 is de-energized, it resets, causing the diaphragm 14 to compress the liquid storage chamber 11 inward. This increases the pressure inside the chamber, forcing the opening / closing assembly 40 to close the inlet 12 and simultaneously open the outlet 13 to discharge the liquid to the required liquid source. Through this periodic on / off control, continuous liquid intake and discharge are achieved.

[0048] See Figures 1 to 3In some embodiments, the electromagnetically powered diaphragm pump further includes a flow detection module 50 and a control module 60. The flow detection module 50 is used to collect flow information from the outlet 13 and obtain flow detection parameters. The control module 60 is electrically connected to the electromagnet assembly 20. In response to a received flow setting operation, the control module 60 periodically powers on the electromagnet assembly 20 according to the flow target parameters and flow detection parameters corresponding to the flow setting operation, so that the electromagnet assembly 20 drives the diaphragm 14 to alternately expand and compress the liquid storage chamber 11 under the action of electromagnetic induction and the elastic potential energy of the elastic component 30.

[0049] The flow detection module 50 is a device used to monitor the liquid output in real time. It can be implemented using a turbine flow meter or an ultrasonic flow sensor, converting pulse signals or sound wave propagation time differences into flow data. The flow setting operation refers to the flow control commands input by the user, which can be achieved through a touchscreen or rotary encoder. The target flow value is converted into an electrical signal and transmitted to the control module 60. The target flow parameter refers to the desired flow value set by the user, which can be stored as a digital signal or an analog voltage signal. The flow detection parameter refers to the actual flow value detected in real time by the flow detection module 50.

[0050] After the user sets the target flow parameter through the flow setting operation, the control module 60 compares the target flow parameter with the flow detection parameter obtained in real time by the flow detection module 50. If the flow detection parameter is lower than the target flow parameter, the control module 60 outputs a periodic on / off signal to the electromagnet assembly 20, causing the electromagnet assembly 20 to periodically power on and off, thereby achieving continuous liquid intake and discharge through periodic power-on / off control. During the power-on phase, the electromagnet assembly 20 generates magnetic force to pull the diaphragm 14 to unfold the liquid storage chamber 11, at which time the liquid inlet 12 opens to draw in liquid. During the power-off phase, the elastic component 30 pushes the electromagnet assembly 20 to reset and compress the liquid storage chamber 11, at which time the liquid outlet 13 opens to discharge liquid while the liquid inlet 12 closes. By alternately powering on and off, a pumping cycle is formed, and the output liquid volume remains constant in each cycle. When the cumulative flow reaches the target flow parameter, the operation automatically stops. This control method adjusts the pumping frequency through real-time feedback to ensure that the output flow accurately matches the set value. Therefore, by directly driving the electromagnet component 20 and the elastic component 30 in combination with closed-loop feedback control, the pumping frequency can be dynamically adjusted, eliminating the response lag caused by mechanical transmission. At the same time, the output is accurately measured in each working cycle, and the cumulative error does not exceed the displacement of a single cycle, which significantly improves the accuracy compared with traditional open-loop control.

[0051] See Figures 1 to 4 In some embodiments, the method for periodically powering on the electromagnet assembly 20 includes, but is not limited to, steps S401 to S403.

[0052] Step S401: Power on the electromagnet assembly 20 and power it off after a preset time.

[0053] Step S402: After the electromagnet assembly 20 is powered off, determine the current flow accumulation parameters.

[0054] The traffic accumulation parameter is the accumulated value of the traffic detection parameter starting from the start of the response traffic setting operation.

[0055] Step S403: Determine whether the traffic accumulation parameter has reached the traffic target parameter.

[0056] If the condition is not met, return to step S401; if the condition is met, proceed to step S404.

[0057] Step S404: Keep the electromagnet assembly 20 powered down.

[0058] The flow accumulation parameter refers to the cumulative value of the flow data collected in real time by the flow detection module 50. It can be implemented using a Hall effect flow sensor or a turbine flow meter to dynamically reflect the actual total output liquid volume. The preset duration refers to the duration of a single energization of the electromagnet component 20. It can be an adjustable parameter ranging from 50 milliseconds to 200 milliseconds, used to control the liquid delivery volume of a single pumping action.

[0059] When a flow rate setting operation is received, the control module 60 triggers the electromagnet assembly 20 to enter a periodic power-on control mode. During each power-on phase, the electromagnet assembly 20 drives the diaphragm 14 to expand the liquid storage chamber 11 to draw in liquid, while the inlet 12 opens and the outlet 13 closes. During the power-off phase, the elastic component 30 pushes the electromagnet assembly 20 to reset, causing the diaphragm 14 to compress the liquid storage chamber 11 and discharge liquid. At this time, the inlet 12 closes and the outlet 13 opens. After each power-off, the control module 60 compares the current accumulated flow rate parameter with the target flow rate parameter. If the current accumulated flow rate parameter does not reach the target flow rate parameter, the next working cycle is automatically started until the accumulated flow rate reaches the target flow rate parameter, at which point the pumping action terminates. This process achieves precise control of the liquid delivery volume through a closed-loop feedback mechanism. Therefore, by dynamically accumulating the accumulated flow rate parameter and comparing it with the target flow rate parameter in real time, the system can actively compensate for delivery volume deviations caused by changes in liquid viscosity or fluctuations in pipeline resistance, ensuring that the final output total flow rate precisely matches the set value.

[0060] See Figures 1 to 3 In some embodiments, the electromagnetically powered diaphragm pump further includes a viscosity detection module 70. The viscosity detection module 70 is used to collect liquid viscosity information from the inlet 12 and obtain viscosity detection parameters. The control module 60 is also used to keep the electromagnet assembly 20 in a de-energized state when the viscosity detection parameters exceed a viscosity threshold parameter or the flow target parameter exceeds a flow threshold parameter.

[0061] The viscosity detection module 70 is a device that measures the viscosity of a liquid in real time using a sensor. Specifically, it can be implemented using a vibrational viscosity sensor or a rotational viscometer, acquiring viscosity data by detecting changes in liquid flow resistance. The viscosity detection parameter refers to the actual viscosity value detected in real time by the viscosity detection module 70. The viscosity threshold parameter is a pre-set upper limit of the safe range for liquid viscosity. When the viscosity detection parameter exceeds this viscosity threshold parameter, it indicates that the liquid viscosity is too high, which may cause pump body 10 to overload. The flow rate threshold parameter is a pre-set upper limit of the safe range for liquid flow rate. When the flow rate detection parameter exceeds this flow rate threshold parameter, it indicates that there is an abnormally high pressure risk at the outlet 13.

[0062] When liquid enters the storage chamber 11 through the inlet 12, the viscosity detection module 70 continuously monitors the liquid flow state and obtains the corresponding viscosity detection parameters. The control module 60 acquires these viscosity detection parameters in real time. If the liquid viscosity is detected to be abnormally high, exceeding the viscosity threshold parameter, or the flow rate target parameter exceeds the flow rate threshold parameter, the control module 60 will immediately cut off the power supply to the electromagnet assembly 20. At this time, the elastic component 30 pushes the electromagnet assembly 20 to reset, causing the diaphragm 14 to stop moving and keeping the storage chamber 11 in a compressed state, thus putting the diaphragm pump into a protection mode to avoid damage to the diaphragm pump due to excessively viscous liquid or excessive flow rate. Therefore, by introducing the linkage control of the viscosity detection mechanism and the flow rate detection mechanism, the power source is actively cut off and the pumping is stopped when the liquid viscosity is too high, leading to increased flow resistance or abnormal pump load, forming a dual protection mechanism.

[0063] In some embodiments, the electromagnetically powered diaphragm pump further includes a temperature detection module. The temperature detection module is used to collect temperature information from both the inlet 12 and the outlet 13 and obtain corresponding temperature detection parameters. The control module 60 is also used to keep the electromagnet assembly 20 powered down when the temperature detection parameters exceed a temperature threshold parameter.

[0064] The temperature detection module is a device that detects temperature changes as liquid flows through a pipe. It can be implemented using a thermocouple or a thermistor, and its installation location can be on the outside or inside of the pipe wall between the inlet 12 and the outlet 13. The temperature detection parameter refers to the temperature value acquired by the temperature detection module and converted into an electrical signal. This value is processed by an analog-to-digital converter circuit to form a digital signal that can be recognized by the control module 60. The temperature threshold parameter refers to a pre-set safe temperature critical value, such as 40℃ or 50℃. This value is set according to the liquid properties and the temperature resistance performance of the pump body 10 material.

[0065] The temperature detection module monitors the liquid temperature in the inlet 12 and outlet 13 areas in real time. When a temperature rise is detected at a certain point and exceeds a preset threshold, the control module 60 immediately cuts off the power supply circuit of the electromagnet assembly 20. At this time, the elastic component 30 pushes the electromagnet assembly 20 to reset, the diaphragm 14 stops moving, keeping the liquid storage chamber 11 stationary, and the liquid flow is interrupted. This process can avoid problems such as material deformation of the pump body 10, seal failure, or liquid deterioration caused by abnormal temperature rise, for example, preventing high temperatures from destroying the activity of biological reagents in medical sample dispensing scenarios. Thus, real-time safety protection of the working state is achieved through dual-port temperature detection and threshold control.

[0066] In some embodiments, the control module 60 is further configured to limit the current of the electromagnet assembly 20, such that the actual peak current of the electromagnet assembly 20 during the startup phase is lower than the peak current before current limiting, and that the current value of the electromagnet assembly 20 during the stabilization phase decreases in a step-like manner.

[0067] The startup phase refers to the transition process of the electromagnet assembly 20 from its initial static state to its stable operating state. This can be determined by a preset time threshold or current change rate, and is used to reduce the current surge during startup. The actual peak current refers to the maximum current value actually reached by the electromagnet assembly 20 during the startup phase. The stabilization phase refers to the stable operating state of the electromagnet assembly 20 after startup until the power-on end. This can also be determined by a preset time threshold or current change rate, and is used to maintain stable liquid delivery efficiency. Step-like decrease refers to the current value gradually decreasing in a discrete step-like manner during the stabilization phase. This can be achieved by adjusting the duty cycle or voltage amplitude in stages, and is used to reduce energy consumption while ensuring flow control accuracy.

[0068] See Figure 5 In one specific embodiment, during the startup phase of the electromagnet assembly 20 ( Figure 5 From time 0 to time T1, the control module 60 limits the actual peak current to a preset range through current limiting measures, such as using a soft-start circuit to gradually increase the current amplitude, avoiding the impact of a sudden large current on the electromagnetic coil 23. Entering the stable phase ( Figure 5 After time T1 to T3, the control module 60 dynamically adjusts the current value based on the flow detection parameters. For example, it reduces the current by a step at fixed intervals until the minimum current value required to maintain the target flow rate is reached. During this process, the current limiting parameters can be adaptively adjusted according to the liquid viscosity or temperature detection parameters to ensure that the electromagnet assembly 20 can operate stably under different operating conditions. Thus, through staged current limiting control, the current peak is suppressed during the startup phase to extend the electromagnet's lifespan, and dynamic energy saving is achieved through step-by-step current adjustment during the stable phase, while maintaining the accuracy of flow control.

[0069] In some embodiments, the control module 60 is further configured to control the power-on and power-off frequency of the electromagnet assembly 20, so that the flow rate of the liquid in the liquid storage chamber 11 changes in a positive correlation with the power-on and power-off frequency of the electromagnet assembly 20.

[0070] The power-on / off frequency control refers to adjusting the alternating frequency of powering on and off the electromagnet assembly 20. This can be achieved using a pulse width modulation circuit or a frequency-adjustable drive chip, by changing the number of times the electromagnet assembly 20 is switched on and off per unit time. The positively correlated flow rate means that the liquid flow velocity in the storage chamber 11 increases linearly with the increasing power-on / off frequency of the electromagnet assembly 20. Specifically, this can be achieved by driving the diaphragm 14 to reciprocate through periodic magnetic force changes generated by the electromagnet assembly 20. Each on / off cycle corresponds to one compression or expansion action of the diaphragm 14, thus forming a continuous liquid delivery pulse.

[0071] When the control module 60 receives a flow rate adjustment command, it changes the on / off cycle of the electromagnet assembly 20 by adjusting the frequency of the drive signal output to the electromagnet assembly 20. For example, in scenarios requiring increased flow rate, the control module 60 increases the frequency of the drive signal, causing the electromagnet assembly 20 to complete more on / off actions per unit time, thereby driving the diaphragm 14 to compress or expand the liquid storage chamber 11 at a higher frequency. The amount of liquid delivered each time the diaphragm 14 moves is fixed, so the total flow rate is proportional to the operating frequency. Thus, the liquid flow rate can be directly controlled by electronic signals without relying on mechanical transmission components. Directly adjusting the electromagnet operating frequency through electronic frequency control eliminates mechanical transmission links, resulting in faster response speed and higher control precision for flow rate adjustment, making it particularly suitable for precision sample dispensing scenarios requiring rapid flow rate switching.

[0072] See Figures 1 to 3 In some embodiments, the opening / closing assembly 40 includes a valve body 41, a first valve plate 42, and a second valve plate 43. The valve body 41 is fixed within the pump body 10 and forms a liquid storage chamber 11 with the diaphragm 14. The valve body 41 has a temporary storage chamber 44 communicating with the outlet 13, and has a first channel 45 communicating with the inlet 12 and the liquid storage chamber 11, and a second channel 46 communicating with the temporary storage chamber 44 and the liquid storage chamber 11. The first valve plate 42 is disposed between the inlet 12 and the valve body 41, connecting the inlet 12 and the first channel 45 when the liquid storage chamber 11 is expanded, and blocking the inlet 12 when the liquid storage chamber 11 is compressed. The second valve plate 43 is disposed between the outlet 13 and the valve body 41, connecting the outlet 13 and the temporary storage chamber 44 when the liquid storage chamber 11 is expanded, and connecting the second channel 46 and the temporary storage chamber 44 when the liquid storage chamber 11 is compressed.

[0073] The valve body 41 is a rigid structural component with an internal cavity, which can be made of stainless steel or engineering plastic through injection molding. Its function is to provide a sealed channel for liquid flow and support the movement of the valve plate. The first channel 45 is the fluid path connecting the inlet 12 and the storage chamber 11. Specifically, it can be a circular hole or channel penetrating the side wall of the valve body 41, used to guide liquid into the storage chamber 11 during its expansion phase. The second channel 46 is the fluid path connecting the storage chamber 11 and the temporary storage chamber 44. Specifically, it can be a through hole located at the bottom of the valve body 41, used to guide liquid to the outlet 13 during the compression phase of the storage chamber 11. The first valve plate 42 and the second valve plate 43 are diaphragm structures with elastic deformation capabilities, which can be made of silicone or fluororubber. The function of the first valve plate 42 is to control the opening and closing state of the inlet 12 through deformation, and the function of the second valve plate 43 is to achieve unidirectional flow of the outlet 13 through pressure difference.

[0074] When the liquid storage chamber 11 is opened under the drive of the electromagnet assembly 20, a negative pressure environment is formed inside. At this time, the first valve plate 42 bends outward under the action of external liquid pressure, so that the liquid inlet 12 is connected to the first channel 45. The liquid flows into the liquid storage chamber 11 through the liquid inlet 12. At the same time, the second valve plate 43 is pressed tightly against the valve body 41 under the action of residual liquid pressure in the temporary storage chamber 44, blocking the connection between the second channel 46 and the temporary storage chamber 44. When the liquid storage chamber 11 is compressed under the action of the elastic component 30, the internal pressure of the liquid storage chamber 11 increases. The first valve plate 42 is pressed tightly against the liquid inlet 12 by the internal liquid pressure to achieve a seal and prevent liquid backflow. At the same time, the second valve plate 43 is pushed upward by the pressure of the liquid storage chamber 11, so that the second channel 46 is connected to the temporary storage chamber 44. The liquid in the liquid storage chamber 11 is discharged from the second channel 46 and temporarily stored in the temporary storage chamber 44. When the liquid storage chamber 11 is opened again, the second valve plate 43 connects the liquid outlet 13 with the temporary storage chamber 44, and the liquid is discharged from the liquid outlet 13 through the temporary storage chamber 44.

[0075] See Figures 1 to 3 In some embodiments, the electromagnet assembly 20 includes a moving iron core 21, a fixed iron core 22, and an electromagnetic coil 23. The moving iron core 21 is connected to the diaphragm 14. The fixed iron core 22 is connected to the side of the moving iron core 21 away from the diaphragm 14 via an elastic component 30. The electromagnetic coil 23 is disposed around the periphery of the moving iron core 21 and generates an electromagnetic magnetic field when energized, magnetizing the moving iron core 21 and displacing it closer to the fixed iron core 22.

[0076] The moving iron core 21 is a magnetically conductive component that can be magnetized and displaced. It can be made of a soft magnetic alloy and is used to convert the magnetic force generated by the electromagnetic coil 23 into mechanical motion to drive the deformation of the diaphragm 14. The fixed iron core 22 is a fixedly installed magnetically conductive component, which can be constructed of stacked silicon steel sheets. It forms a closed magnetic circuit with the moving iron core 21 to enhance the magnetic field strength. The electromagnetic coil 23 is a conductive winding wound around the moving iron core 21. It can be made of enameled copper wire and is used to generate an alternating magnetic field when energized to drive the moving iron core 21 to reciprocate.

[0077] When the electromagnetic coil 23 is energized, it generates an alternating magnetic field. Under the influence of this magnetic field, the moving iron core 21 is magnetized and moves towards the fixed iron core 22, thereby causing the diaphragm 14 to stretch the liquid storage chamber 11. When the electromagnetic coil 23 is de-energized, the elastic component 30 releases its stored elastic potential energy, pushing the moving iron core 21 to move in the opposite direction and compress the liquid storage chamber 11. The moving iron core 21 and the fixed iron core 22 are connected by the elastic component 30 in a non-rigid manner, allowing the electromagnetic force and elastic force to work together to achieve the periodic deformation of the diaphragm 14. Thus, the moving iron core 21 is directly driven by the electromagnetic coil 23, eliminating intermediate transmission components and shortening the power transmission path. At the same time, the closed magnetic circuit formed by the moving iron core 21 and the fixed iron core 22 improves the utilization rate of the magnetic field, while the resetting effect of the elastic component 30 makes the movement of the diaphragm 14 bidirectionally controllable.

[0078] In one specific embodiment, the moving iron core 21 can be designed as a cylindrical structure to optimize the magnetic circuit distribution, the electromagnetic coil 23 can be provided with multi-layer windings to improve the magnetic field strength, and the stiffness coefficient of the elastic component 30 can be adjusted according to the liquid delivery pressure requirements.

[0079] See Figures 1 to 3 In some embodiments, the pump body 10 has a cleaning channel 80 extending from the pump body 10 to the liquid storage chamber 11. The inlet end of the cleaning channel 80 can be located on the outer surface of the pump body 10, and the outlet end connects to the side wall or bottom of the liquid storage chamber 11. When cleaning is required, external cleaning agent or disinfectant is injected into the liquid storage chamber 11 through the cleaning channel 80 to flush away residues adhering to the inner wall of the chamber and the surface of the diaphragm 14, and then discharged through the inlet 12 or the outlet 13. This structure avoids the cumbersome operation of disassembling the pump body 10 for cleaning, which is necessary for traditional diaphragm pumps, and is especially suitable for medical scenarios where frequent sterilization is required.

[0080] In summary, the diaphragm pump based on electromagnetic power provided in this application does not require a permanent magnet motor as a power source. Instead, it uses a power source that combines electromagnetic drive and elastic reset. The diaphragm pump is driven by the synergistic action of the elastic component and the electromagnet component to pump fluid. This retains the fast response characteristics of adjustable electromagnetic field strength while achieving precise reset through mechanical energy storage. It avoids the defects of permanent magnets being susceptible to environmental temperature changes, ensuring a constant displacement for each pumping stroke and effectively eliminating the idle stroke error caused by gear backlash in traditional permanent magnet motors. Furthermore, the direct linkage mechanism between the opening / closing component and the deformation of the storage chamber avoids the flow control lag problem caused by external sensor signal delays, improving the driving accuracy, driving response speed, and stability when driving the diaphragm pump.

[0081] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0082] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A diaphragm pump based on electromagnetic power, characterized in that, include: The pump body has a liquid storage chamber and an inlet and an outlet communicating with the liquid storage chamber. It is equipped with a diaphragm for deforming the liquid storage chamber and an opening and closing assembly for closing one of the inlet and the outlet and opening the other when the liquid storage chamber is deformed. An electromagnet assembly, connected to the diaphragm, drives the diaphragm to expand the liquid storage chamber when powered on, so that the opening and closing assembly opens the liquid inlet and closes the liquid outlet when the liquid storage chamber is expanded. An elastic component abuts against the electromagnet component and presses against the electromagnet component when the electromagnet component is energized, causing the electromagnet component to drive the diaphragm to compress the liquid storage chamber, so that the opening and closing component closes the liquid inlet and opens the liquid outlet when the liquid storage chamber is compressed. The opening / closing component includes: The valve body is fixed in the pump body and forms the liquid storage chamber with the diaphragm. It also forms a temporary storage chamber that communicates with the liquid outlet and has a first channel that communicates with the liquid inlet and the liquid storage chamber and a second channel that communicates with the temporary storage chamber and the liquid storage chamber. A first valve plate is disposed between the liquid inlet and the valve body, which connects the liquid inlet and the first channel when the liquid storage chamber is expanded, and blocks the liquid inlet when the liquid storage chamber is compressed. The second valve plate is disposed between the liquid outlet and the valve body, which connects the liquid outlet and the temporary storage chamber when the liquid storage chamber is expanded, and connects the second channel and the temporary storage chamber when the liquid storage chamber is compressed. The electromagnet assembly includes: The moving iron core is connected to the diaphragm; A fixed iron core is connected to the side of the moving iron core away from the diaphragm via the elastic component; An electromagnetic coil is disposed around the periphery of the moving iron core. When energized, it generates an electromagnetic magnetic field, which magnetizes the moving iron core and causes it to move closer to the stationary iron core.

2. The diaphragm pump based on electromagnetic power according to claim 1, characterized in that, Also includes: The flow detection module is used to collect the flow information of the liquid outlet and obtain the flow detection parameters; The control module, electrically connected to the electromagnet assembly, is used to periodically power on the electromagnet assembly in response to a received flow setting operation, based on the flow target parameters corresponding to the flow setting operation and the flow detection parameters, so that the electromagnet assembly drives the diaphragm to alternately expand and compress the liquid storage chamber under the action of electromagnetic induction and the elastic potential energy of the elastic component.

3. The diaphragm pump based on electromagnetic power according to claim 2, characterized in that, The step of periodically powering on the electromagnet assembly based on the flow target parameters corresponding to the flow setting operation and the flow detection parameters includes: Power on the electromagnet assembly and then power it off after a preset time; After the electromagnet assembly is powered off, the current flow accumulation parameter is determined; the flow accumulation parameter is the accumulated value of the flow detection parameter since the response to the flow setting operation. Determine whether the accumulated traffic parameter has reached the target traffic parameter; If the desired result is not achieved, return to the step of powering on the electromagnet assembly and then powering it off after a preset time. If this is achieved, the electromagnet assembly will remain powered down.

4. The diaphragm pump based on electromagnetic power according to claim 2, characterized in that, Also includes: The viscosity detection module is used to collect the liquid viscosity information at the inlet and obtain viscosity detection parameters; The control module is also used to keep the electromagnet assembly in a powered-off state when the viscosity detection parameter exceeds the viscosity threshold parameter or the flow target parameter exceeds the flow threshold parameter.

5. The diaphragm pump based on electromagnetic power according to claim 2, characterized in that, Also includes: The temperature detection module is used to collect the temperature information of both the liquid inlet and the liquid outlet and obtain the corresponding temperature detection parameters. The control module is also used to keep the electromagnet assembly in a powered-off state when the temperature detection parameter exceeds the temperature threshold parameter.

6. The diaphragm pump based on electromagnetic power according to claim 2, characterized in that, The control module is also used to limit the current of the electromagnet component, so that the actual peak current of the electromagnet component during the startup phase is lower than the peak current before current limiting, and to make the current value of the electromagnet component decrease in a step-like manner during the stable phase.

7. The diaphragm pump based on electromagnetic power according to claim 2, characterized in that, The control module is also used to control the power-on and power-off frequency of the electromagnet assembly, so that the flow rate of the liquid in the storage chamber changes positively correlated with the power-on and power-off frequency of the electromagnet assembly.

8. The diaphragm pump based on electromagnetic power according to any one of claims 1 to 7, characterized in that, The pump body has a cleaning channel that extends from the pump body to the liquid storage chamber.

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