Pump structure and preparation method of pump structure

Abstract

The embodiment of the invention discloses a pump structure and a preparation method of the pump structure, the pump structure comprises a moving assembly and a valve body assembly, and the moving assembly comprises a moving body and a supporting piece; the valve body assembly is connected with the supporting piece in a sealed mode, and a containing cavity is formed among the moving body, the supporting piece and the valve body assembly. When the moving body moves in the direction away from the supporting piece, the pressure intensity of the containing cavity is reduced, under driving of the pressure intensity difference between the containing cavity and the outside, the first valve plate can be opened, fluid enters the containing cavity sequentially along the water inlet and the first valve plate, and the second valve plate is closed. When the moving body moves in the direction close to the supporting piece, the pressure intensity of the containing cavity is increased, under driving of the pressure intensity difference between the containing cavity and the outside, the second valve plate can be opened, fluid flows out of the containing cavity sequentially along the second valve plate and the water outlet, and the first valve plate is closed.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric pumps, and more specifically, to a pump structure and a method for preparing the pump structure. Background Art

[0002] Piezoelectric pump is a fluid device that uses the inverse piezoelectric effect of piezoelectric ceramics and a piezoelectric vibrator as a driver. It is widely used in biomedicine, heat dissipation and cooling, portable detection equipment and other fields due to its compact structure, high control accuracy, fast response speed and long life.

[0003] In the existing piezoelectric pump structure, the valve plate part mostly adopts cantilever beam type or wheel type, but the cantilever beam type valve plate has poor sealing performance, and the wheel type valve plate is easily deformed by liquid impact during vibration, which leads to poor performance consistency of the piezoelectric pump structure. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a new technical solution for a pump structure and a method for preparing the pump structure.

[0005] According to one aspect of the present invention, a pump structure is provided.

[0006] The pump structure comprises:

[0007] A motion component, the motion component comprising a motion body and a support, the motion body being arranged on the support;

[0008] a valve body assembly, wherein the valve body assembly is sealed and connected to the support member, and a receiving chamber is formed between the moving body, the support member and the valve body assembly, and the valve body assembly is provided with a first valve plate, a second valve plate, a water inlet and a water outlet, the water inlet is communicated with the first valve plate, and the water outlet is communicated with the second valve plate;

[0009] When the moving body moves in a direction away from the supporting member, the pressure of the accommodating chamber decreases, and driven by the pressure difference between the accommodating chamber and the outside, the first valve plate can be opened, and the fluid enters the accommodating chamber along the water inlet and the first valve plate in sequence, and the second valve plate is closed;

[0010] When the moving body moves in a direction approaching the supporting member, the pressure in the accommodating chamber increases, and driven by the pressure difference between the accommodating chamber and the outside world, the second valve plate can be opened, and the fluid flows out of the accommodating chamber along the second valve plate and the water outlet in turn, and the first valve plate is closed.

[0011] Optionally, the valve body assembly includes a valve plate, the first valve plate and the second valve plate are respectively connected to the valve plate, and along the extension direction of the valve plate, there is a first gap between the first valve plate and the valve plate, and there is a second gap between the second valve plate and the valve plate.

[0012] Optionally, the first valve plate includes a first movable part and at least one first connecting part, one end of the first connecting part is connected to the first movable part, and the other end of the first connecting part is connected to the valve plate, and the first movable part can move and open the first valve plate so that the first gap is connected to the accommodating chamber.

[0013] Optionally, the first valve sheet includes a plurality of the first connecting portions, and the plurality of the first connecting portions are evenly connected to the outer periphery of the first movable portion.

[0014] Optionally, the first connecting portion includes a first section, a second section and a third section connected between the first section and the second section, the first section is connected to the first movable portion, the second section is connected to the valve plate, and an angle is formed between the third section and the first section, and between the third section and the second section.

[0015] Optionally, along the extension direction of the first connecting portion, the width of the second segment is greater than at least one of the width of the first segment and the width of the third segment.

[0016] Optionally, along the extension direction of the valve plate, a ratio of a width of the first connecting portion to a width of the first gap is greater than or equal to one third.

[0017] Optionally, the second valve plate has the same structure as the first valve plate.

[0018] Optionally, the valve body assembly further comprises a first pressing plate, the first pressing plate having a first opening and a second opening, the first opening being opposite to the first valve sheet and having a size smaller than that of the first valve sheet, and the second opening being opposite to the second valve sheet;

[0019] A first limiting portion is provided on a side of the first pressure plate close to the first valve disc. The first limiting portion is located at an outer periphery of the first opening. The first limiting portion is used to form a sealing limit for the first valve disc.

[0020] Optionally, the first limiting portion includes at least one first limiting rib, and when the moving body moves in a direction close to the support member, the first valve plate can be circumferentially fitted with the first limiting rib, so that the first gap is not connected to the accommodating chamber.

[0021] Optionally, the valve body assembly further comprises a second pressing plate, wherein the second pressing plate and the first pressing plate are respectively arranged on opposite sides of the valve plate, and the second pressing plate has a third opening and a fourth opening, wherein the third opening is opposite to the first valve plate, and the fourth opening is opposite to the second valve plate, and the size of the fourth opening is smaller than the size of the second valve plate;

[0022] A second limiting portion is provided on one side of the second pressure plate close to the second valve disc. The second limiting portion is located at the periphery of the fourth opening. The second limiting portion is used to form a sealing limit for the second valve disc.

[0023] Optionally, a size of the second opening is larger than a size of the second valve plate, and a size of the third opening is larger than a size of the first valve plate.

[0024] Optionally, the valve body assembly further comprises a base, the base is arranged on a side of the valve plate away from the moving assembly, and the water inlet and the water outlet are arranged on the base.

[0025] Optionally, the moving body includes a piezoelectric component, and the piezoelectric component is arranged on the supporting component. When power is supplied, the piezoelectric component can be deformed and change the pressure of the accommodating chamber.

[0026] Optionally, the moving body further includes a reinforcement member having a groove, and the piezoelectric member is connected to an inner wall of the groove.

[0027] According to another aspect of the present invention, there is provided a method for preparing a pump structure, comprising:

[0028] Making a motion assembly, the motion assembly comprising a motion body and a support, and placing the motion body on the support;

[0029] A valve body assembly is manufactured, and the valve body assembly is sealed and connected to the support member, and a receiving chamber is formed between the moving body, the support member and the valve body assembly, wherein the valve body assembly has a first valve plate, a second valve plate, a water inlet and a water outlet, wherein the water inlet is communicated with the first valve plate, and the water outlet is communicated with the second valve plate;

[0030] When the moving body moves in a direction away from the supporting member, the pressure of the accommodating chamber decreases, and driven by the pressure difference between the accommodating chamber and the outside, the first valve plate can be opened, and the fluid enters the accommodating chamber along the water inlet and the first valve plate in sequence, and the second valve plate is closed;

[0031] When the moving body moves in a direction approaching the supporting member, the pressure in the accommodating chamber increases, and driven by the pressure difference between the accommodating chamber and the outside world, the second valve plate can be opened, and the fluid flows out of the accommodating chamber along the second valve plate and the water outlet in turn, and the first valve plate is closed.

[0032] One technical effect of the embodiments of the present disclosure is:

[0033] The pump structure comprises a moving assembly and a valve body assembly, wherein the moving assembly comprises a moving body and a support, wherein the moving body is arranged on the support; the valve body assembly is sealed and connected to the support, and a containing chamber is formed between the moving body, the support and the valve body assembly, wherein the valve body assembly is provided with a first valve plate, a second valve plate, a water inlet and a water outlet, wherein the water inlet is communicated with the first valve plate, and the water outlet is communicated with the second valve plate;

[0034] When the moving body moves in a direction away from the supporting member, the pressure in the accommodating chamber decreases, and driven by the pressure difference between the accommodating chamber and the outside world, the first valve plate can be opened, and the fluid enters the accommodating chamber along the water inlet and the first valve plate in sequence, and the second valve plate is closed; when the moving body moves in a direction approaching the supporting member, the pressure in the accommodating chamber increases, and driven by the pressure difference between the accommodating chamber and the outside world, the second valve plate can be opened, and the fluid flows out of the accommodating chamber along the second valve plate and the water outlet in sequence, and the first valve plate is closed.

[0035] In this way, by utilizing the reciprocating motion of the moving body, the pressure can be changed by changing the volume of the accommodating chamber, so that a pressure difference is generated between the accommodating chamber and the outside world, thereby driving one of the first valve plate and the second valve plate to open, and realizing the unidirectional inflow and outflow of the fluid, thereby realizing the function of the pump structure. This process relies only on the energy conversion of mechanical motion, which is convenient for improving the performance consistency of the pump structure, and also improves the reliability and service life of the pump structure.

[0036] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0038] Figure 1 is an exploded view of a pump structure according to an embodiment of the present disclosure;

[0039] Figure 2 is a schematic diagram of a first pressing plate according to an embodiment of the present disclosure;

[0040] Figure 3 is a schematic diagram of a valve plate according to an embodiment of the present disclosure;

[0041] Figure 4 is a cross-sectional view of a pump structure according to an embodiment of the present disclosure;

[0042] Figure 5 is another cross-sectional view of a pump structure according to an embodiment of the present disclosure.

[0043] Description of reference numerals:

[0044] 1. Moving component; 11. Moving body; 111. Piezoelectric element; 112. Reinforcement member; 12. Support member; 2. Valve body assembly; 21. Accommodating chamber; 22. First valve plate; 221. First movable part; 222. First connecting part; 2221. First section; 2222. Second section; 2223. Third section; 23. Second valve plate; 24. Water inlet; 25. Water outlet; 26. Valve plate; 27. First pressure plate; 271. First opening; 272. Second opening; 273. First limiting rib; 28. Second pressure plate; 29. ​​Base. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0046] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0047] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0048] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0049] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] An embodiment of the present invention provides a pump structure, which, as a fluid driving device, can be applied to the fields of biomedicine, portable detection equipment, etc.

[0051] like Figures 1 to 5As shown, the pump structure provided by the embodiment of the present invention includes:

[0052] A motion component 1, the motion component 1 comprising a motion body 11 and a support member 12, the motion body 11 being arranged on the support member 12;

[0053] A valve body assembly 2, wherein the valve body assembly 2 is sealed and connected to the support member 12, and a receiving chamber 21 is formed between the moving body 11, the support member 12 and the valve body assembly 2, and the valve body assembly 2 has a first valve plate 22, a second valve plate 23, a water inlet 24 and a water outlet 25, wherein the water inlet 24 is in communication with the first valve plate 22, and the water outlet 25 is in communication with the second valve plate 23;

[0054] When the moving body 11 moves in a direction away from the support member 12, the pressure of the accommodating chamber 21 decreases. Driven by the pressure difference between the accommodating chamber 21 and the outside, the first valve plate 22 can be opened, and the fluid enters the accommodating chamber 21 along the water inlet 24 and the first valve plate 22 in sequence, and the second valve plate 23 is closed.

[0055] When the moving body 11 moves in a direction approaching the support member 12, the pressure in the accommodating chamber 21 increases. Driven by the pressure difference between the accommodating chamber 21 and the outside world, the second valve plate 23 can be opened, and the fluid flows out of the accommodating chamber 21 along the second valve plate 23 and the water outlet 25 in turn, and the first valve plate 22 is closed.

[0056] like Figure 1 As shown, the moving body 11 may be a piezoelectric element 111, which can deform when powered, thereby generating vibration. The moving body 11 may also include a moving element and a driving element, wherein the output end of the driving element is connected to the moving element, and the driving element is used to drive the moving element to move.

[0057] The support member 12 can be made of metal materials such as stainless steel, and the support member 12 is designed as a frame structure, which is used to fix and support the moving body 11. A through hole is provided in the center of the support member 12, allowing the moving body 11 to reciprocate therein.

[0058] The valve body assembly 2 is sealed and connected to the support member 12. On the one hand, the motion assembly 1 can be connected to the valve body assembly 2, which is convenient for assembling the pump structure; on the other hand, the connection between the motion assembly 1 and the valve body assembly 2 can be sealed, so that a closed accommodating chamber 21 is formed between the motion body 11, the support member 12 and the valve body assembly 2. Figure 4 and Figure 5 When the moving body 11 moves in the height direction, the volume of the accommodating chamber 21 can be changed, thereby changing the pressure in the accommodating chamber 21 .

[0059] like Figure 1 As shown, the first valve plate 22 is disposed on one side of the valve body assembly 2, opposite to and connected to the water inlet 24. The first valve plate 22 can be made of elastic materials such as rubber, silicone or elastic metal, and the first valve plate 22 is designed as a one-way opening structure, for example, when the pressure in the accommodating chamber 21 is lower than the outside pressure, it opens to allow fluid to flow in; or a mechanical structure can be used to control the opening of the first valve plate 22 as needed, otherwise it is closed.

[0060] The second valve plate 23 is opposite to and connected to the water outlet 25. The second valve plate 23 can also be made of elastic materials such as rubber, silicone or elastic metal. The second valve plate 23 is designed as a one-way opening structure. For example, when the pressure in the accommodating chamber 21 is higher than the outside pressure, it opens to allow the fluid to flow out; or a mechanical structure can be used to control the opening of the second valve plate 23 as needed, otherwise it is closed. The water inlet 24 and the water outlet 25 are respectively opened on both sides of the valve body assembly 2, which are used to connect external pipelines to realize the input and output of fluids.

[0061] like Figure 4 As shown, when the moving body 11 moves in a direction away from the support member 12, that is, when the moving body 11 moves upward, the volume of the accommodating chamber 21 increases, so that the pressure of the accommodating chamber 21 decreases. At this time, the external pressure is greater than the pressure of the accommodating chamber 21. Driven by the pressure difference between the accommodating chamber 21 and the external pressure, the first valve plate 22 can be opened. At this time, the fluid enters the accommodating chamber 21 along the water inlet 24 and the first valve plate 22 in sequence, and the second valve plate 23 is closed, so that the one-way inflow of the fluid can be achieved.

[0062] like Figure 5 As shown, when the moving body 11 moves in the direction close to the support member 12, that is, when the moving body 11 moves downward, the volume of the accommodating chamber 21 decreases, so that the pressure of the accommodating chamber 21 increases. At this time, the external pressure is less than the pressure of the accommodating chamber 21. Driven by the pressure difference between the accommodating chamber 21 and the outside, the second valve plate 23 can be opened. At this time, the fluid flows out of the accommodating chamber 21 along the second valve plate 23 and the water outlet 25 in sequence, and the first valve plate 22 is closed, so that the unidirectional outflow of the fluid can be achieved.

[0063] In this way, by utilizing the reciprocating motion of the moving body 11, the pressure can be changed by changing the volume of the accommodating chamber 21, so that a pressure difference is generated between the accommodating chamber 21 and the outside, thereby driving one of the first valve plate 22 and the second valve plate 23 to open, and realizing the unidirectional inflow and outflow of the fluid, thereby realizing the function of the pump structure. This process only relies on the energy conversion of mechanical motion, does not require additional electricity or fuel consumption, and also reduces the energy consumption of the pump structure.

[0064] Compared with traditional pump equipment, the pump structure of the present invention has fewer components, and the connection and matching design between the components are exquisite, making the overall structure compact and easy to manufacture and maintain. This not only reduces the manufacturing cost of the pump structure, but also facilitates improving the performance consistency of the pump structure, and also improves the reliability and service life of the pump structure.

[0065] Optionally, the valve body assembly 2 includes a valve plate 26, the first valve plate 22 and the second valve plate 23 are respectively connected to the valve plate 26, and along the extension direction of the valve plate 26, there is a first gap between the first valve plate 22 and the valve plate 26, and there is a second gap between the second valve plate 23 and the valve plate 26.

[0066] Specifically, in one embodiment, the first valve disc 22 and the second valve disc 23 can be cantilevered and connected to the valve plate 26, so that the free end of the first valve disc 22 and the free end of the second valve disc 23 can move relative to the valve plate 26 and open the valve disc to facilitate the flow of fluid.

[0067] In another embodiment, Figure 3 As shown, it is also possible to set a first gap between the first valve plate 22 and the valve plate 26 along the extension direction of the valve plate 26, that is, the first valve plate 22 and the valve plate 26 are not completely connected, so that the fluid can flow into the accommodating chamber 21 through the first gap. A second gap is provided between the second valve plate 23 and the valve plate 26, that is, the second valve plate 23 and the valve plate 26 are not completely connected, so that the fluid can flow out of the accommodating chamber 21 through the second gap.

[0068] Optionally, the first valve plate 22 includes a first movable part 221 and at least one first connecting part 222, one end of the first connecting part 222 is connected to the first movable part 221, and the other end of the first connecting part 222 is connected to the valve plate 26, and the first movable part 221 can move and open the first valve plate 22, so that the first gap is connected to the accommodating chamber 21.

[0069] like Figure 3 As shown, the first movable portion 221 may be circular, and the first connecting portion 222 is used to connect the first movable portion 221 and the valve plate 26 to realize the assembly of the first valve plate 22. According to the actual design, one, two, three or even more first connecting portions 222 may be provided, and the connection strength of the first valve plate 22 may be adjusted accordingly.

[0070] In addition, according to actual needs, the shape of the first movable portion 221 can be adjusted, for example, it can be designed to be rectangular, elliptical or other shapes.

[0071] like Figure 4As shown, when the moving body 11 moves in a direction away from the support member 12, that is, when the moving body 11 moves upward, the volume of the accommodating chamber 21 increases, so that the pressure of the accommodating chamber 21 decreases. At this time, the external pressure is greater than the pressure of the accommodating chamber 21. Driven by the pressure difference between the accommodating chamber 21 and the outside, the first movable part 221 can move and open the first valve plate 22, so that the first gap is connected to the accommodating chamber 21. At this time, the fluid enters the accommodating chamber 21 along the water inlet 24, the first gap and the first valve plate 22 in sequence, and the second valve plate 23 is closed, so that the unidirectional inflow of the fluid can be achieved.

[0072] Optionally, the first valve plate 22 includes a plurality of first connecting portions 222, and the plurality of first connecting portions 222 are evenly connected to the outer periphery of the first movable portion 221. Figure 3 As shown, the provision of multiple first connecting parts 222 can enhance the connection strength of the first valve plate 22, and can also ensure the reliability of the up and down movement of the first movable part 221, avoiding abnormalities such as tilting and distortion of the first movable part 221, thereby ensuring the reliability of the pump structure.

[0073] Optionally, the first connecting portion 222 includes a first section 2221, a second section 2222 and a third section 2223 connected between the first section 2221 and the second section 2222, the first section 2221 is connected to the first movable portion 221, the second section 2222 is connected to the valve plate 26, and an angle is formed between the third section 2223 and the first section 2221, and between the third section 2223 and the second section 2222.

[0074] like Figure 3 As shown, the multi-section arrangement of the first connecting portion 222 can facilitate its connection with the first valve disc 22 and the valve disc plate 26 and also reduce the difficulty of assembly.

[0075] Optionally, along the extension direction of the first connecting portion 222 , the width of the second section 2222 is greater than at least one of the width of the first section 2221 and the width of the third section 2223 .

[0076] like Figure 3 As shown, along the extension direction of the first connecting portion 222, the width of the second section 2222 can be set to be greater than the width of the first section 2221, or the width of the second section 2222 can be set to be greater than the width of the third section 2223, or the width of the second section 2222 can be set to be greater than the width of the first section 2221 and the width of the third section 2223. Both of these can ensure that the second section 2222 connected to the valve plate 26 has a certain width, thereby ensuring the connection strength, and also ensuring the reliability of the up and down movement of the first movable part 221, avoiding abnormalities such as tilting and distortion of the first movable part 221, thereby ensuring the reliability of the pump structure.

[0077] Optionally, along the extension direction of the valve plate 26 , the ratio of the width of the first connecting portion 222 to the width of the first gap is greater than or equal to one third.

[0078] That is, the width of the first connecting portion 222 is not less than one third of the width of the first gap, so as to ensure that the first connecting portion 222 has a certain width, thereby ensuring the connection strength, and also ensuring the reliability of the up and down movement of the first movable portion 221, avoiding the first movable portion 221 from tilting, twisting and other abnormalities, thereby ensuring the reliability of the pump structure.

[0079] Optionally, the second valve plate 23 has the same structure as the first valve plate 22 .

[0080] Specifically, the second valve plate 23 may include a second movable part and at least one second connecting part, one end of the second connecting part is connected to the second movable part, and the other end of the second connecting part is connected to the valve plate 26, and the second movable part can move and open the second valve plate 23, so that the second gap is connected to the accommodating chamber 21 to facilitate the outflow of fluid.

[0081] Optionally, the valve body assembly 2 further includes a first pressing plate 27, the first pressing plate 27 having a first opening 271 and a second opening 272, the first opening 271 being opposite to the first valve disc 22, and the size of the first opening 271 is smaller than the size of the first valve disc 22, and the second opening 272 is opposite to the second valve disc 23;

[0082] A first limiting portion is provided on one side of the first pressure plate 27 close to the first valve disc 22 . The first limiting portion is located at the periphery of the first opening 271 . The first limiting portion is used to form a sealing limit for the first valve disc 22 .

[0083] like Figure 1 and Figure 2 As shown, the first opening 271 is opposite to the first valve disc 22, and the size of the first opening 271 is smaller than the size of the first valve disc 22, so that the first gap in the first valve disc 22 can be closed by the first pressure plate 27, and the first valve disc 22 is closed to prevent the fluid from flowing. The second opening 272 is opposite to the second valve disc 23, and the size of the second opening 272 is larger than the size of the second valve disc 23, so that the second gap in the second valve disc 23 can be connected to the accommodating chamber 21 through the second opening 272, and the fluid can flow.

[0084] like Figure 2As shown, the first limiting portion includes but is not limited to limiting ribs, limiting strips and limiting protrusions. The first limiting portion is located at the periphery of the first opening 271. When the moving body 11 moves in the direction close to the support member 12, since the external pressure is less than the pressure of the accommodating chamber 21, the pressure difference between the two enables the first valve plate 22 to fit circumferentially with the first limiting portion and close the first gap in the first valve plate 22. At this time, the first gap is not connected to the accommodating chamber 21, and the fluid cannot flow. In this way, the one-way cutoff of the first valve plate 22 can be guaranteed, and the control requirements for the flatness of the first pressure plate 27 can also be reduced, thereby reducing the processing cost of the pump structure. Among them, the first pressure plate 27 is mostly rigid metal, which can ensure its sealing reliability for the first gap in the first valve plate 22, thereby ensuring the working reliability of the pump structure.

[0085] Optionally, the first limiting portion includes at least one first limiting rib 273. When the moving body 11 moves in a direction close to the support member 12, the first valve plate 22 can be circumferentially fitted with the first limiting rib 273, so that the first gap is not connected to the accommodating chamber 21.

[0086] like Figure 2 As shown, the first limiting portion may include one, two, three or even multiple first limiting ribs 273, which are located at the periphery of the first opening 271 and opposite to the first valve disc 22. For example, a groove may be provided on the first pressing plate 27 to form a corresponding protruding first limiting rib 273, the inner diameter of the first limiting rib 273 is smaller than the diameter of the first valve disc 22, and the outer diameter of the first limiting rib 273 is larger than the diameter of the first valve disc 22, so as to ensure good sealing. When the moving body 11 moves in a direction close to the support member 12, the first valve disc 22 can be circumferentially fitted with the first limiting rib 273 to close the first gap in the first valve disc 22, at which time the first gap is not connected to the accommodating chamber 21, and the fluid cannot flow.

[0087] Optionally, the valve body assembly 2 further includes a second pressing plate 28, wherein the second pressing plate 28 and the first pressing plate 27 are respectively arranged on opposite sides of the valve plate 26, and the second pressing plate 28 has a third opening and a fourth opening, wherein the third opening is opposite to the first valve plate 22, and the fourth opening is opposite to the second valve plate 23, and the size of the fourth opening is smaller than the size of the second valve plate 23;

[0088] A second limiting portion is provided on one side of the second pressure plate 28 close to the second valve disc 23 . The second limiting portion is located at the periphery of the fourth opening. The second limiting portion is used to form a sealing limit for the second valve disc 23 .

[0089] like Figure 1As shown, the first pressure plate 27 is used to control the closing of the first valve disc 22 and the opening of the second valve disc 23, and the second pressure plate 28 is used to control the opening of the first valve disc 22 and the closing of the second valve disc 23. The third opening is opposite to the first valve disc 22, and the size of the third opening is larger than the size of the first valve disc 22, so that the first gap in the first valve disc 22 and the accommodating chamber 21 can be connected through the third opening, and the fluid can be allowed to flow. The fourth opening is opposite to the second valve disc 23, and the size of the fourth opening is smaller than the size of the second valve disc 23, so that the second gap in the second valve disc 23 can be closed by the second pressure plate 28, and the second valve disc 23 can be closed to prevent the fluid from flowing.

[0090] The second limiting portion includes but is not limited to limiting ribs, limiting strips and limiting protrusions. The second limiting portion is located at the periphery of the fourth opening. When the moving body 11 moves in a direction away from the support member 12, since the external pressure is greater than the pressure of the accommodating chamber 21, the pressure difference between the two enables the second valve plate 23 to fit circumferentially with the second limiting portion and close the second gap in the second valve plate 23. At this time, the second gap is not connected to the accommodating chamber 21, and the fluid cannot flow. The second pressure plate 28 is mostly made of rigid metal, which can ensure the sealing reliability of the second gap in the second valve plate 23, thereby ensuring the working reliability of the pump structure.

[0091] Optionally, the size of the second opening 272 is larger than the size of the second valve plate 23 , and the size of the third opening is larger than the size of the first valve plate 22 , so as to facilitate smooth flow of fluid through corresponding gaps.

[0092] Optionally, the valve body assembly 2 further comprises a base 29, which is disposed on a side of the valve plate 26 away from the motion assembly 1, and the water inlet 24 and the water outlet 25 are disposed on the base 29. Figure 1 As shown, the water inlet 24 and the water outlet 25 are respectively opened on the base 29 for connecting to external pipelines to realize the input and output of fluids.

[0093] Optionally, the moving body 11 includes a piezoelectric element 111 , and the piezoelectric element 111 is disposed on the supporting element 12 . When powered, the piezoelectric element 111 can be deformed and change the pressure of the accommodating chamber 21 .

[0094] Specifically, the moving body 11 may include a piezoelectric element 111, which can be deformed when powered, thereby generating vibration, and the reciprocating motion of the piezoelectric element 111 can be used to change the pressure by changing the volume of the accommodating chamber 21, so that a pressure difference is generated between the accommodating chamber 21 and the outside world, thereby driving one of the first valve plate 22 and the second valve plate 23 to open, and realizing the unidirectional inflow and outflow of the fluid, thereby realizing the function of the pump structure. Moreover, using the piezoelectric element 111 as a driving element for the flow of the fluid makes the overall structure of the pump structure compact, and has the advantages of easy miniaturization, easy integration, high control accuracy, fast response speed, low power consumption, long life, and high reliability.

[0095] Optionally, the moving body 11 further includes a reinforcing member 112 , the reinforcing member 112 has a groove, and the piezoelectric member 111 is connected to an inner wall of the groove.

[0096] like Figure 1 As shown, the reinforcing member 112 plays a role in strengthening the movement, and the piezoelectric member 111 can be connected to the inner wall of the groove by bonding, welding, etc. When powered, the piezoelectric member 111 can deform, drive the reinforcing member 112 to move together, and change the pressure of the accommodating chamber 21.

[0097] The embodiment of the present invention further provides a method for preparing the pump structure as described above, comprising:

[0098] A motion assembly 1 is manufactured, wherein the motion assembly 1 comprises a motion body 11 and a support member 12, and the motion body 11 is disposed on the support member 12;

[0099] A valve body assembly 2 is manufactured, and the valve body assembly 2 is sealed and connected to the support member 12, and a receiving chamber 21 is formed between the moving body 11, the support member 12 and the valve body assembly 2, and the valve body assembly 2 has a first valve plate 22, a second valve plate 23, a water inlet 24 and a water outlet 25, the water inlet 24 is communicated with the first valve plate 22, and the water outlet 25 is communicated with the second valve plate 23;

[0100] When the moving body 11 moves in a direction away from the support member 12, the pressure of the accommodating chamber 21 decreases, and driven by the pressure difference between the accommodating chamber 21 and the outside, the first valve plate 22 can be opened, and the fluid enters the accommodating chamber 21 along the water inlet 24 and the first valve plate 22 in sequence, and the second valve plate 23 is closed;

[0101] When the moving body 11 moves in a direction approaching the support member 12, the pressure in the accommodating chamber 21 increases. Driven by the pressure difference between the accommodating chamber 21 and the outside world, the second valve plate 23 can be opened, and the fluid flows out of the accommodating chamber 21 along the second valve plate 23 and the water outlet 25 in turn, and the first valve plate 22 is closed.

[0102] The motion component 1 and the valve body component 2 can be bonded by laser welding, wherein the valve body component 2 can be bonded by a laminated laser welding process, including the entire valve body component 2 being bonded by laser welding or laser welding superimposed with glue composite bonding process.

[0103] Specifically, the first pressing plate 27, the valve plate 26, the second pressing plate 28 and the base 29 can be stacked together, and laser welding is performed continuously along the periphery and the middle of the upper surface of the second pressing plate 28 by a laser welding process, and then laser welding is performed continuously along the periphery and the middle of the lower surface of the base 29. Alternatively, the first pressing plate 27, the valve plate 26 and the second pressing plate 28 can be stacked and welded first, and then the base 29 can be glued.

[0104] After the motion component 1 and the valve body component 2 are pressed tightly, a laser welding process is used to seal and weld the motion component 1 around to ensure that there is no gap between the various parts of the pump structure and the sealing effect is good. In addition, the laser welding process can reduce the overall thickness of the pump structure, making the pump structure lighter and thinner, and reducing the space occupied by the pump structure in the whole machine.

[0105] In this way, by utilizing the reciprocating motion of the moving body 11, the pressure can be changed by changing the volume of the accommodating chamber 21, so that a pressure difference is generated between the accommodating chamber 21 and the outside, thereby driving one of the first valve plate 22 and the second valve plate 23 to open, and realizing the unidirectional inflow and outflow of the fluid, thereby realizing the function of the pump structure. This process only relies on the energy conversion of mechanical motion, does not require additional electricity or fuel consumption, and also reduces the energy consumption of the pump structure.

[0106] Compared with traditional pump equipment, the pump structure of the present invention has fewer components, and the connection and matching design between the components are exquisite, making the overall structure compact and easy to manufacture and maintain. This not only reduces the manufacturing cost of the pump structure, but also facilitates improving the performance consistency of the pump structure, and also improves the reliability and service life of the pump structure.

[0107] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0108] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pump structure, characterized in that: include: A motion component (1), the motion component (1) comprising a motion body (11) and a support member (12), the motion body (11) being arranged on the support member (12); A valve body assembly (2), wherein the valve body assembly (2) is sealedly connected to the support member (12), and a receiving chamber (21) is formed between the moving body (11), the support member (12) and the valve body assembly (2); the valve body assembly (2) is provided with a first valve plate (22), a second valve plate (23), a water inlet (24) and a water outlet (25), the water inlet (24) is communicated with the first valve plate (22), and the water outlet (25) is communicated with the second valve plate (23); When the moving body (11) moves in a direction away from the support member (12), the pressure of the accommodating chamber (21) decreases, and driven by the pressure difference between the accommodating chamber (21) and the outside, the first valve plate (22) can be opened, and the fluid enters the accommodating chamber (21) along the water inlet (24) and the first valve plate (22) in sequence, and the second valve plate (23) is closed; When the moving body (11) moves in a direction approaching the support member (12), the pressure of the accommodating chamber (21) increases, and driven by the pressure difference between the accommodating chamber (21) and the outside, the second valve plate (23) can be opened, and the fluid flows out of the accommodating chamber (21) along the second valve plate (23) and the water outlet (25) in sequence, and the first valve plate (22) is closed.

2. The pump structure according to claim 1, characterized in that: The valve body assembly (2) comprises a valve plate (26), the first valve plate (22) and the second valve plate (23) being respectively connected to the valve plate (26), and along the extension direction of the valve plate (26), there is a first gap between the first valve plate (22) and the valve plate (26), and there is a second gap between the second valve plate (23) and the valve plate (26).

3. The pump structure according to claim 2, characterized in that: The first valve plate (22) comprises a first movable portion (221) and at least one first connecting portion (222), one end of the first connecting portion (222) is connected to the first movable portion (221), and the other end of the first connecting portion (222) is connected to the valve plate (26), and the first movable portion (221) is capable of moving and opening the first valve plate (22), so that the first gap is connected to the accommodating chamber (21).

4. The pump structure according to claim 3, characterized in that: The first valve plate (22) comprises a plurality of first connecting portions (222), and the plurality of first connecting portions (222) are evenly connected to the outer periphery of the first movable portion (221).

5. The pump structure according to claim 3, characterized in that: The first connecting portion (222) comprises a first section (2221), a second section (2222) and a third section (2223) connected between the first section (2221) and the second section (2222); the first section (2221) is connected to the first movable portion (221); the second section (2222) is connected to the valve plate (26); and angles are formed between the third section (2223) and the first section (2221), and between the third section (2223) and the second section (2222).

6. The pump structure according to claim 5, characterized in that: Along the extension direction of the first connecting portion (222), the width of the second section (2222) is greater than at least one of the width of the first section (2221) and the width of the third section (2223).

7. The pump structure according to claim 3, characterized in that: Along the extension direction of the valve plate (26), the ratio of the width of the first connecting portion (222) to the width of the first gap is greater than or equal to one third.

8. The pump structure according to claim 1, characterized in that: The second valve plate (23) has the same structure as the first valve plate (22).

9. The pump structure according to claim 2, characterized in that: The valve body assembly (2) further comprises a first pressing plate (27), the first pressing plate (27) having a first opening (271) and a second opening (272), the first opening (271) being opposite to the first valve plate (22), and the size of the first opening (271) being smaller than the size of the first valve plate (22), and the second opening (272) being opposite to the second valve plate (23); A first limiting portion is provided on a side of the first pressure plate (27) close to the first valve plate (22), the first limiting portion is located at the periphery of the first opening (271), and the first limiting portion is used to form a sealing limit for the first valve plate (22).

10. The pump structure according to claim 9, characterized in that The first limiting portion comprises at least one first limiting rib (273), and when the moving body (11) moves in a direction approaching the support member (12), the first valve plate (22) can be circumferentially fitted with the first limiting rib (273), so that the first gap is not connected to the accommodating chamber (21).

11. The pump structure according to claim 9, characterized in that The valve body assembly (2) further comprises a second pressing plate (28), wherein the second pressing plate (28) and the first pressing plate (27) are respectively arranged on opposite sides of the valve plate (26), and the second pressing plate (28) has a third opening and a fourth opening, wherein the third opening is opposite to the first valve plate (22), and the fourth opening is opposite to the second valve plate (23), and the size of the fourth opening is smaller than the size of the second valve plate (23); The second pressure plate (28) has a second limiting portion on one side close to the second valve plate (23), the second limiting portion is located at the outer periphery of the fourth opening, and the second limiting portion is used to form a sealing limit for the second valve plate (23).

12. The pump structure according to claim 11, characterized in that The size of the second opening (272) is larger than the size of the second valve plate (23), and the size of the third opening is larger than the size of the first valve plate (22).

13. The pump structure according to claim 2, characterized in that The valve body assembly (2) further comprises a base (29), wherein the base (29) is arranged on a side of the valve plate (26) away from the moving assembly (1), and the water inlet (24) and the water outlet (25) are arranged on the base (29).

14. The pump structure according to claim 1, characterized in that The moving body (11) comprises a piezoelectric element (111), and the piezoelectric element (111) is arranged on the supporting element (12). When power is supplied, the piezoelectric element (111) can deform and change the pressure of the containing chamber (21).

15. The pump structure according to claim 14, characterized in that The moving body (11) further comprises a reinforcing member (112), the reinforcing member (112) having a groove, and the piezoelectric member (111) is connected to the inner wall of the groove.

16. A method for preparing a pump structure according to any one of claims 1 to 15, characterized in that: include: Making a motion assembly, the motion assembly comprising a motion body and a support, and placing the motion body on the support; A valve body assembly is manufactured, and the valve body assembly is sealed and connected to the support member, and a receiving chamber is formed between the moving body, the support member and the valve body assembly, wherein the valve body assembly has a first valve plate, a second valve plate, a water inlet and a water outlet, wherein the water inlet is communicated with the first valve plate, and the water outlet is communicated with the second valve plate; When the moving body moves in a direction away from the supporting member, the pressure of the accommodating chamber decreases, and driven by the pressure difference between the accommodating chamber and the outside, the first valve plate can be opened, and the fluid enters the accommodating chamber along the water inlet and the first valve plate in sequence, and the second valve plate is closed; When the moving body moves in a direction approaching the supporting member, the pressure in the accommodating chamber increases, and driven by the pressure difference between the accommodating chamber and the outside world, the second valve plate can be opened, and the fluid flows out of the accommodating chamber along the second valve plate and the water outlet in turn, and the first valve plate is closed.

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