Driving assembly and fluid pump

Abstract

The utility model relates to the technical field of fluid pumps, in particular to a driving assembly and a fluid pump, the driving assembly comprises a motor, a base, an eccentric wheel, a connecting shaft and a curved bar, the motor is provided with an output shaft, the eccentric wheel is installed on the output shaft and located in an installation cavity of the base, and the base is provided with an installation cavity and an exhaust cavity; the installation cavity and the exhaust cavity are communicated to form a heat dissipation flow path. The service life of the fluid pump is prolonged by prolonging the service life of the motor, the base, the eccentric wheel and the curved bar.

Description

Technical Field

[0001] The present application relates to the technical field of fluid delivery pumps, and in particular to a drive assembly and a fluid pump. Background Art

[0002] A fluid pump is a pump used to transport fluid media, including but not limited to gases and liquids. The selection of a fluid pump typically depends on a number of factors, including flow rate requirements, pressure requirements, media characteristics, and the operating environment.

[0003] Generally speaking, the flow rate of a fluid pump is highly correlated with its size. A small fluid pump with a large flow rate usually draws a large current, which in turn shortens the pump's service life. Utility Model Content

[0004] In order to extend the service life of a fluid pump, the purpose of the present application is to provide a drive assembly and a fluid pump.

[0005] In the first aspect, the present application provides a drive assembly that adopts the following technical solution:

[0006] A drive assembly includes a motor, a base, an eccentric wheel, a connecting shaft and a crankshaft. The motor has an output shaft, the eccentric wheel is installed on the output shaft, the outer edge surface of the eccentric wheel has blades, the base has an installation cavity and an exhaust cavity, the installation cavity and the exhaust cavity are connected to form a heat dissipation flow path, and the eccentric wheel is located in the installation cavity.

[0007] By adopting the above technical solution, the motor is energized to rotate the output shaft, driving the eccentric wheel to rotate. The blades on the outer edge surface of the eccentric wheel rotate synchronously with the eccentric wheel, thereby driving the air to rotate and form an airflow. The existence of the airflow enables the gas in the installation cavity to be discharged from the exhaust cavity with the heat in the installation cavity, thereby reducing the heat accumulation in the installation cavity.

[0008] When the heat inside the mounting cavity is too high, plastic parts such as the eccentric and crankshaft can soften and deform due to the heat, causing accelerated wear of the plastic parts and shortening the service life of the fluid pump. The solution of this application reduces heat accumulation in the mounting cavity, thereby lowering the ambient temperature of the plastic parts during operation, thereby extending the service life of the fluid pump.

[0009] Optionally, the motor housing has an air hole connected to the exhaust chamber.

[0010] By adopting the above technical solution, when the airflow formed by the rotation of the air flows through the exhaust chamber, the heat generated inside the motor can be carried away by the airflow through the air holes under the action of air pressure, thereby reducing the heat accumulation inside the motor.

[0011] High-flow fluid pumps tend to generate more heat inside the motor due to the high current draw. Excessive heat buildup in the motor can easily reduce the motor's magnetic field strength and accelerate wear of motor components, leading to rapid power output degradation and a shortened pump lifespan. The solution in this application accelerates heat removal from the motor, reducing internal heat buildup and thus extending the pump's lifespan.

[0012] Optionally, the exhaust cavity includes a drainage hole segment, and the opening area of the air hole partially overlaps or completely overlaps with the opening area of the drainage hole segment;

[0013] When the opening area of the air hole partially overlaps with the opening area of the drainage hole segment, the overlapping portion of the opening area of the air hole is larger than the non-overlapping portion of the opening area of the air hole.

[0014] By adopting this technical solution, some or all of the airflow from the drainage hole section enters the motor through the air holes, carrying the heat from the motor back out through other openings in the motor housing, thereby reducing heat accumulation inside the motor. The amount of airflow entering the motor in this manner depends on the cross-sectional area of the overlap between the opening area of the air holes and the opening area of the drainage hole section.

[0015] Optionally, the exhaust cavity includes a drainage hole section and a discharge slot section sequentially arranged along the airflow discharge direction, and the opening area of the air hole is staggered or partially overlapped with the opening area of the drainage hole section;

[0016] When the opening area of the air hole partially overlaps with the opening area of the drainage hole segment, the overlapping portion of the opening area of the air hole is smaller than the non-overlapping portion of the opening area of the air hole.

[0017] By adopting this technical solution, air can flow from the drainage hole section into the discharge slot section before being discharged to the outside. When air enters the discharge slot section, the flow rate in the discharge slot section increases, reducing the air pressure through the air hole. Under the action of pressure, the heat and gas in the motor enter the discharge slot section, quickly removing heat from the motor, reducing heat accumulation inside the motor, and thus extending the service life of the fluid pump.

[0018] Optionally, the cross-sectional width of the discharge slot segment increases in a direction away from the center of the base, and the opening of the drainage hole segment is located in a region of the discharge slot segment close to the center of the base.

[0019] By adopting the above technical solution, the opening of the drainage hole section can increase the airflow path so that the airflow can contact more areas of the base, thereby improving the heat dissipation efficiency of the base itself and reducing heat accumulation inside the base.

[0020] Optionally, a raised platform is formed between two adjacent discharge trough sections; when the number of drainage hole sections is even, every two adjacent drainage hole sections form a group, and the two drainage hole sections in the same group are close to the corresponding raised platforms.

[0021] By adopting the above technical solution, the base area where the raised platform is located is thicker. Setting the drainage hole section here can relatively reduce the impact on the wall thickness strength, and setting the two drainage hole sections in the same group close to the same raised platform can simplify the structural design and processing of the base.

[0022] Optionally, all raised platforms are classified according to their functions. The classification of raised platforms includes a first raised platform and a second raised platform. The raised platform that cooperates with a group of drainage hole segments is the first raised platform, and the second raised platform is provided with a connector for connecting a motor.

[0023] By adopting the above technical solution, the second raised platform for installing the connecting part needs to be drilled, and the drilling will weaken the strength of the raised platform to a certain extent. Therefore, distinguishing the first raised platform from the second raised platform can avoid the short service life caused by the weak structural strength of a single raised platform, thereby extending the service life of the drive component.

[0024] Optionally, the side surface of the second elevated platform has a widened portion.

[0025] By adopting the above technical solution, the widened portion is centered on the installation position of the connecting piece to widen the second raised platform, thereby reducing the reduction in strength of the second raised platform caused by drilling holes for the connecting piece, thereby extending the service life of the drive component.

[0026] In a second aspect, the present application provides a fluid pump that adopts the following technical solution:

[0027] A fluid pump comprises any one of the above drive components.

[0028] By adopting the above technical solution, the structure of the drive assembly is optimized, and the heat dissipation capacity of the drive assembly is improved to extend the service life of the drive assembly, thereby extending the service life of the fluid pump.

[0029] Optionally, a fluid operation component is also included, and the fluid operation component includes:

[0030] A pump cover is provided with a fluid inlet interface and a fluid outlet interface;

[0031] A valve seat is connected to the pump cover and is provided with a plurality of fluid inlet holes and fluid outlet holes;

[0032] a membrane seat connected to the valve seat;

[0033] The diaphragm is arranged on the membrane seat and is driven by the driving assembly to change its volume periodically, and the fluid inlet hole and the fluid outlet hole are both opposite to the opening of the diaphragm;

[0034] The valve seat is provided with a plurality of one-way valves for opening or closing the fluid inlet hole and the fluid outlet hole;

[0035] Independent air intake and exhaust passages are formed between the pump cover, the valve seat and the diaphragm.

[0036] By adopting the above technical solution, when the driving component is working, the volume of the diaphragm changes periodically to allow part of the fluid to enter the fluid inlet hole, while the fluid outlet hole is not connected to the fluid inlet hole, thereby realizing the working process of the fluid pump fluid inlet interface intake and fluid outlet interface exhaust.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. When the heat inside the mounting cavity is too high, plastic parts such as the eccentric wheel and crankshaft can easily soften and deform due to the heat, causing accelerated wear of the plastic parts and shortening the service life of the fluid pump. The solution of this application reduces heat accumulation in the mounting cavity, thereby lowering the ambient temperature of the plastic parts during operation, thereby extending the service life of the fluid pump.

[0039] 2. High-flow fluid pumps tend to generate more heat inside the motor due to the high current. Excessive heat buildup in the motor can easily reduce the motor's magnetic field strength and accelerate wear of motor components, leading to rapid power output degradation and a shorter pump lifespan. The solution in this application accelerates heat removal from the motor, reducing internal heat buildup and thus extending the pump's lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0041] Figure 2 This is a schematic diagram of the explosion structure of an embodiment of the present application;

[0042] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present application;

[0043] Figure 4 It is a schematic diagram of the cross-sectional structure of the base;

[0044] Figure 5 It is a structural diagram of the eccentric wheel.

[0045] In the picture:

[0046] 1. Fluid running components;

[0047] 11. Pump cover; 111. Fluid inlet interface; 112. Fluid outlet interface;

[0048] 12. Valve seat; 121. Fluid inlet hole; 122. Fluid outlet hole;

[0049] 13. Membrane holder;

[0050] 14. Diaphragm;

[0051] 15. One-way valve;

[0052] 2. Drive components;

[0053] 21. Motor; 211. Housing; 2111. Air hole; 212. Output shaft;

[0054] 22. Base; 221. Mounting cavity; 222. Exhaust cavity; 2221. Drainage hole section; 2222. Discharge slot section; 223. Inlet cavity; 224. First raised platform; 225. Second raised platform; 2251. Widened portion;

[0055] 23. Eccentric wheel; 231. Blade;

[0056] 24. Connecting shaft;

[0057] 25. Bend rod;

[0058] 26. Connectors. DETAILED DESCRIPTION

[0059] The following is combined with Figure 1-5 , further details of this application are given.

[0060] The embodiment of the present application discloses a fluid pump, which can transport a gas or a liquid. The fluid pump is composed of a drive component 2 and a fluid running component 1. The core design point of the fluid pump lies in the structural design of the drive component 2, which increases the heat dissipation flow path. The fluid running component 1 can select various conventional structures in the field according to actual design requirements, including but not limited to the stop pump head related structure in the publication number CN219388115U, the fluid running component 1 in the publication number CN114635843B and the pump related structure with a quick exhaust valve diaphragm 14 in the publication number CN213016733U.

[0061] Reference Figure 1 A fluid pump includes a driving component 2 and a fluid running component 1. The driving component 2 is responsible for providing driving force, and the fluid running component 1 is driven by the driving force of the driving component 2 to transport gas.

[0062] Reference Figure 2 and Figure 3The fluid operation component 1 includes a pump cover 11, a valve seat 12, a membrane seat 13, and a diaphragm 14. The diaphragm 14 is installed on the membrane seat 13. The diaphragm 14 has multiple capsules. The multiple capsules are driven by the driving component 2 to change their volumes periodically in sequence. The valve seat 12 is installed on the membrane seat 13 and closes the capsule opening. The valve seat 12 has multiple groups of one-way air supply paths, and the number of one-way air supply paths corresponds to the number of capsules. Each group of one-way air supply paths includes a fluid inlet hole 121 and a fluid outlet hole 122 that are not connected to each other. The valve seat 12 is equipped with multiple one-way valves 15 to match the fluid inlet hole 121 and the fluid outlet hole 122 of each group of one-way air supply paths, so that each group of fluid inlet hole 121 and fluid outlet hole 122 are connected to the corresponding capsule and limit the one-way flow of air, that is, independent air intake and exhaust paths are formed between the pump cover 11, the valve seat 12 and the diaphragm 14. The pump cover 11 is provided with a fluid inlet port 111 and a fluid outlet port 112. The fluid inlet port 111 is arranged to communicate with all the fluid inlet holes 121 via a flow path, and the fluid outlet port 112 is arranged to communicate with all the fluid outlet holes 122 via a flow path. The fluid inlet port 111 can be formed by an air inlet pipe integrally formed on the pump cover 11, and the fluid outlet port 112 can be formed by an exhaust pipe integrally formed on the pump cover 11. Since the fluid flow assembly 1 is common knowledge known to those skilled in the art, its positional relationship and connection relationship will not be further described here. The arrangement can be made with reference to the fluid flow assembly 1 in publication number CN114635843B.

[0063] Reference Figure 2 and Figure 3 The driving assembly 2 includes a motor 21, a base 22, an eccentric wheel 23, a connecting shaft 24 and a crank rod 25.

[0064] The motor 21 comprises a housing 211, magnets, electrodes, a rotor, an output shaft 212, and other small parts. The assembly of the various components within the motor 21 is common knowledge to those skilled in the art and will not be further elaborated here. The housing 211 of the motor 21 is quasi-cylindrical in shape. The axis of the output shaft 212 coincides with the axis of the housing 211, and one end of the output shaft 212 extends outside the housing 211.

[0065] Reference Figure 3 and Figure 4The base 22 has a mounting cavity 221. The base 22 is mounted on the motor 21 housing 211, and the output shaft 212 of the motor 21 extends into the mounting cavity 221. The eccentric wheel 23 is located in the mounting cavity 221 and is mounted on the output shaft 212. The eccentric wheel 23 rotates synchronously with the eccentric wheel 23. The connecting shaft 24 is tilted and mounted on the eccentric wheel 23. Friction can be reduced by providing steel balls and lubricating oil at the connection between the connecting shaft 24 and the eccentric wheel 23. The curved rod 25 is fixedly connected to the connecting shaft 24 to be tilted and arranged along with the connecting shaft 24. The multiple capsule cups of the diaphragm 14 are all fixed to the curved rod 25. The curved rod 25 is driven by the connecting shaft 24 to swing so that the volume of the capsule cup changes periodically in sequence. The positional relationship and connection relationship of the motor 21, base 22, eccentric wheel 23, connecting shaft 24 and curved rod 25 are common knowledge known to those skilled in the art and will not be described in detail here.

[0066] Reference Figure 3 and Figure 4 The core point of this application is to optimize the structure of the base 22 and the eccentric wheel 23 so that the base 22 can flow air when the fluid pump is working, thereby accelerating the heat dissipation efficiency.

[0067] Reference Figure 5 The outer edge of the eccentric wheel 23 has blades 231. The blades 231 can be a single blade or multiple blades distributed in parallel. The blades 231 can extend parallel to the output shaft 212 or be inclined. Depending on the actual design requirements, the airflow generated by the blades 231 can flow toward the motor 21 or away from the motor 21. In this embodiment, the airflow flows toward the motor 21.

[0068] Reference Figure 3 and Figure 4 In order to cooperate with the flow of air, the base 22 is provided with an exhaust cavity 222. Correspondingly, the exhaust cavity 222 corresponds to an air inlet cavity 223. The air inlet cavity 223 can be set on the base 22 or the membrane seat 13. The air inlet cavity 223 and the exhaust cavity 222 are both connected with the mounting cavity 221. In this embodiment, the exhaust cavity 222 is located in the area of the base 22 close to the motor 21, the air inlet cavity 223 is located in the area of the base 22 away from the motor 21, and the eccentric wheel 23 is located between the exhaust cavity 222 and the air inlet cavity 223. The air inlet cavity 223, the mounting cavity 221 and the exhaust cavity 222 are connected in sequence to form a heat dissipation flow path. The airflow generated by the rotation of the blades 231 of the eccentric wheel 23 will attract the gas entering the air inlet cavity 223, and discharge it from the exhaust cavity 222 after pressurization.

[0069] In order to improve the heat dissipation efficiency in the installation cavity 221, there are multiple exhaust cavities 222 and they are circumferentially spaced around the axis of the output shaft 212. Each exhaust cavity 222 includes a drainage hole section 2221 and a discharge slot section 2222 arranged in sequence along the airflow discharge direction. The existence of multiple exhaust cavities 222 results in multiple discharge slot sections 2222. The discharge slot sections 2222 are located on a side of the bottom of the base 22 close to the motor 21 and are circumferentially spaced on the side. The cross-sectional width of each discharge slot section 2222 increases in a direction away from the center of the base 22. The existence of multiple exhaust cavities 222 results in multiple drainage hole sections 2221. The number of drainage hole sections 2221 is the same as or a multiple of the number of discharge slot sections 2222 for corresponding arrangement. The drainage hole section 2221 extends through the bottom of the base 22. One end of the drainage hole section 2221 communicates with the mounting cavity 221, and the other end communicates with the corresponding exhaust trough section 2222. The airflow direction within the drainage hole section 2221 does not coincide with the airflow direction within the exhaust trough section 2222. The opening where the drainage hole section 2221 connects to the exhaust trough section 2222 is located in an area of the exhaust trough section 2222 near the center of the base 22. In this embodiment, there are four exhaust cavities 222, each of which includes a drainage hole section 2221 and a exhaust trough section 2222.

[0070] A raised platform is formed between two adjacent discharge trough sections 2222. There are multiple raised platforms, and all raised platforms are classified according to their functions. The classified raised platforms include a first raised platform 224 and a second raised platform 225. When the number of drainage hole sections 2221 is an even number, every two adjacent drainage hole sections 2221 form a group. In this embodiment, the number of discharge trough sections 2222 is four, so the number of raised platforms is four. The two symmetrical ones of the four raised platforms are the first raised platforms 224, and the other two symmetrical ones are the second raised platforms 225. At this time, the first raised platform 224 is located between the two drainage hole sections 2221 in the same group, and the two drainage hole sections 2221 are relatively close to the first raised platform 224 and away from the second raised platform 225.

[0071] The second raised platform 225 is provided with a connector 26 for connecting to the motor. In this embodiment, the connector 26 is a screw, so a connection hole is provided through the second raised platform 225 for the screw shaft to pass through. The screw shaft passes through the connection hole and is then threadedly connected to the housing 211 of the motor 21. The side of the second raised platform 225 has a widened portion 2251, which allows the side of the second raised platform 225 to be configured as an outwardly convex arc, thereby reducing the strength of the second raised platform 225 caused by drilling a hole for the connector 26.

[0072] Reference Figure 3 and Figure 4Furthermore, to improve the heat dissipation efficiency of the motor 21, a plurality of air holes 2111 are provided on the side of the motor housing 211 near the base 22. The number of air holes 2111 corresponds to the number of exhaust slots 2222. One end of the air hole 2111 connects to heat-generating areas such as the rotor within the motor 21, while the other end of the air hole 2111 connects to the exhaust slot 2222 of the exhaust chamber 222. The openings of the air holes 2111 and the drainage slots 2221 can be offset, partially overlapped, or completely overlapped. Different heat dissipation methods can be achieved depending on the degree of overlap.

[0073] When the opening area of the air hole 2111 and the opening area of the drainage hole section 2221 are misaligned or slightly overlapped, the airflow enters the discharge slot section 2222. At this time, the flow rate of the discharge slot section 2222 is accelerated, so that the air pressure of the air hole 2111 is reduced. The heat and gas in the motor 21 enter the discharge slot section 2222 under the action of pressure, which accelerates the removal of heat in the motor 21 to reduce the heat accumulation inside the motor 21, thereby extending the service life of the fluid pump. The small overlap here refers to the overlapping part of the opening area of the air hole 2111 being smaller than the non-overlapping part of the opening area of the air hole 2111. Figure 1 In this embodiment, the opening area of the air hole 2111 and the opening area of the drainage hole section 2221 are slightly overlapped.

[0074] However, when the opening area of the air hole 2111 and the opening area of the drainage hole section 2221 largely or completely overlap, the airflow from the drainage hole section 2221 partially or completely enters the interior of the motor 21 through the air hole 2111, and then carries the heat from the interior of the motor 21 out of other openings on the motor housing 211, thereby reducing heat accumulation inside the motor 21. The term "substantially overlapping" here means that the overlapping portion of the opening area of the air hole 2111 is greater than the non-overlapping portion of the opening area of the air hole 2111.

[0075] The heat dissipation principle of a fluid pump according to an embodiment of the present application is as follows: When the motor 21 is energized, the output shaft 212 rotates, driving the eccentric 23 to rotate. The blades 231 on the outer edge of the eccentric 23 rotate synchronously with the eccentric 23, thereby driving the air to rotate and form an airflow. The presence of the airflow allows the gas in the mounting chamber 221 to be discharged from the exhaust chamber 222, carrying the heat within the mounting chamber 221 with it. This reduces the accumulation of heat within the mounting chamber 221, thereby reducing the wear of plastic parts such as the eccentric 23 and the crankshaft 25, which are easily softened and deformed due to heat. At the same time, when the airflow formed by the rotation of the air flows through the exhaust chamber 222, the heat generated within the motor 21 can be carried away by the airflow through the air holes 2111 under the action of air pressure. This reduces the heat accumulation within the motor 21, which can reduce the reduction of the magnetic field strength of the motor 21, the parameter life decay, and the accelerated wear of the motor 21 components. By extending the service life of the motor 21, the base 22, the eccentric 23, and the crankshaft 25, the service life of the fluid pump is extended.

[0076] The examples in this specific embodiment are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a specific component, respectively. Therefore, any equivalent variations based on the structure, shape, and principles of this application are intended to be within the scope of protection of this application.

Claims

1. A drive assembly, characterized in that: The invention comprises a motor (21), a base (22), an eccentric wheel (23), a connecting shaft (24) and a crank rod (25), wherein the motor (21) has an output shaft (212), the eccentric wheel (23) is mounted on the output shaft (212), the outer edge surface of the eccentric wheel (23) has blades (231), the base (22) has a mounting cavity (221) and an exhaust cavity (222), the mounting cavity (221) and the exhaust cavity (222) are connected to form a heat dissipation flow path, and the eccentric wheel (23) is located in the mounting cavity (221).

2. A drive assembly according to claim 1, characterized in that: The housing (211) of the motor (21) has an air hole (2111), and the air hole (2111) is communicated with the exhaust cavity (222).

3. A drive assembly according to claim 2, characterized in that: The exhaust cavity (222) comprises a drainage hole section (2221), and the opening area of the air hole (2111) partially overlaps or completely overlaps with the opening area of the drainage hole section (2221); When the opening area of the air hole (2111) partially overlaps with the opening area of the drainage hole section (2221), the overlapping portion of the opening area of the air hole (2111) is larger than the non-overlapping portion of the opening area of the air hole (2111).

4. A drive assembly according to claim 2, characterized in that: The exhaust cavity (222) comprises a drainage hole section (2221) and a discharge slot section (2222) sequentially arranged along the airflow discharge direction, and the opening area of the air hole (2111) and the opening area of the drainage hole section (2221) are misaligned or partially overlapped; When the opening area of the air hole (2111) partially overlaps with the opening area of the drainage hole section (2221), the overlapping portion of the opening area of the air hole (2111) is smaller than the non-overlapping portion of the opening area of the air hole (2111).

5. A drive assembly according to claim 4, characterized in that: The cross-sectional width of the discharge trough section (2222) increases in a direction away from the center of the base (22), and the opening of the drainage hole section (2221) is located in an area of the discharge trough section (2222) close to the center of the base (22).

6. A drive assembly according to claim 4, characterized in that: A raised platform is formed between two adjacent discharge trough sections (2222); when the number of the drainage hole sections (2221) is even, every two adjacent drainage hole sections (2221) form a group, and the two drainage hole sections (2221) in the same group are close to the corresponding raised platform.

7. A drive assembly according to claim 6, characterized in that: All the raised platforms are classified according to their functions. The raised platforms include a first raised platform (224) and a second raised platform (225). The raised platform that cooperates with a group of drainage hole sections (2221) is the first raised platform (224), and the second raised platform (225) is provided with a connector (26) for connecting to the motor (21).

8. A drive assembly according to claim 7, characterized in that: The side surface of the second raised platform (225) has a widened portion (2251).

9. A fluid pump, characterized in that: Comprising a drive assembly (2) according to any one of claims 1 to 8.

10. A fluid pump according to claim 9, characterized in that: The invention also comprises a fluid operation component (1), wherein the fluid operation component (1) comprises: A pump cover (11) is provided with a fluid inlet interface (111) and a fluid outlet interface (112); a valve seat (12) connected to the pump cover (11), wherein the valve seat (12) is provided with a plurality of groups of fluid inlet holes (121) and fluid outlet holes (122); a membrane seat (13), connected to the valve seat (12); a diaphragm (14) disposed on the membrane seat (13) and driven by the driving assembly (2) to periodically change its volume, wherein the fluid inlet hole (121) and the fluid outlet hole (122) are both opposite to the opening of the diaphragm (14); The valve seat (12) is provided with a plurality of one-way valves (15) for opening or closing the fluid inlet hole (121) and the fluid outlet hole (122); Mutually independent air intake passages and air exhaust passages are formed between the pump cover (11), the valve seat (12) and the diaphragm (14).

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