Pump head and fluid pump

Abstract

The application relates to a pump head, comprising a pump cover, a diaphragm seat and a functional part arranged between the pump cover and the diaphragm seat. Two independent flow paths are arranged in the pump head, the first one comprising a one-way communication input flow path and an output flow path, and a pressure relief flow path selectively communicated with the output flow path, and the second one comprising a stop flow path. A valve function sheet is arranged on the functional part, the valve function sheet and the pump cover form a valve function cavity communicated with the output flow path, and the valve function sheet and the diaphragm seat form a pump function cavity communicated with the stop flow path, and the valve function sheet selectively communicates the output flow path and the pressure relief flow path according to the pressure of the valve function cavity and the pump function cavity. Through the above technical scheme, the fluid has two independent flow paths in the pump head, the pump function and the valve function are respectively realized through the two independent flow paths, the flow path structure is optimized, and the problem of low reliability caused by the mutual correlation of the pump valve flow path in the traditional technology is solved.

Description

Technical Field

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

[0002] In the application of fluid pumps, it is sometimes necessary to pump fluid into a closed working chamber to create a certain internal pressure in the chamber. After the pressure in the chamber reaches a preset target and the corresponding action is completed, the chamber needs to be depressurized.

[0003] To ensure that fluid pumps have an automatic pressure relief function, pressure relief valves are often integrated into the fluid pumps. The valve's opening and closing depends on the pressure differential of the fluid in the flow path. However, in existing integration methods, the flow paths of dual-function pumps with integrated pumps and valves are interconnected, resulting in unstable pressure differentials and low valve reliability. Summary of the Invention

[0004] Based on this, it is necessary to provide a pump head to address the problem of low performance reliability of the pump-valve dual-function integrated air pump.

[0005] A pump head comprises a pump cover, a diaphragm seat, and a functional component disposed between the pump cover and the diaphragm seat. The pump cover is provided with an output flow path, a pressure relief flow path, and a first flow channel that selectively connects the output flow path and the pressure relief flow path. The diaphragm seat is provided with an input flow path, a leak-stop flow path, and a second flow channel, wherein the input flow path connects to the output flow path, and the leak-stop flow path connects to the second flow channel. The functional component is provided with an input one-way valve disc, a leak-stop one-way valve disc, and a valve function disc. The input one-way valve disc connects the input flow path and the output flow path in a one-way direction along the fluid input direction, the leak-stop one-way valve connects the leak-stop flow path and the pump tank in a one-way direction along the fluid input direction, the valve function disc and the first flow channel together form a valve function chamber, the valve function disc and the second flow channel together form a pump function chamber, and the valve function disc selectively connects the output flow path and the pressure relief flow path according to the pressures of the valve function chamber and the pump function chamber.

[0006] By adopting the technical scheme, the fluid has two independent flow paths in the pump head, wherein the first flow path is that the fluid enters the output flow path from the input flow path through the input one-way valve sheet and finally flows into the sealed working capsule. The second flow path is that the fluid enters the pump function cavity from the relief flow path through the relief one-way valve sheet, at this time, the pressure of the pump function cavity is greater than that of the valve function cavity, so the valve function sheet disconnects the output flow path and the relief flow path, and the fluid can only enter the working capsule through the output flow path, so as to realize the pump function. When the pump stops inputting fluid, the fluid in the working capsule flows back to the valve function cavity, the pressure of the valve function cavity is greater than that of the pump function cavity, the valve function sheet connects the output flow path and the relief flow path, the fluid flows from the output flow path to the relief flow path, and finally is discharged to the outside to realize the relief function. The two independent flow paths respectively realize the pump function and the valve function, so as to optimize the flow path structure and solve the problem of low reliability caused by the mutual correlation of the pump valve flow path in the traditional technology.

[0007] In one of the embodiments, the valve function sheet comprises a first valve sheet, the relief flow path comprises a relief port communicating with the outside, and the valve function sheet can be elastically deformed to block or connect the relief port.

[0008] By adopting the technical scheme, the valve function sheet with elasticity can be elastically deformed according to the relative pressure between the valve function cavity and the pump function cavity on both sides, so as to make the valve function sheet abut against or separate from the relief port, thereby realizing the isolation or connection between the output flow path and the relief flow path.

[0009] In one of the embodiments, the first flow channel is provided with an output groove and a relief groove, the relief groove communicates with the relief flow path, the output groove communicates with the output flow path and the relief flow path, and the valve function sheet is used to open and close the communication part of the output groove and the relief groove while opening and closing the relief flow path.

[0010] By adopting the technical scheme, the first flow channel is further provided with the output groove and the relief groove, and the valve function sheet needs to open and close the communication of the output groove and the relief groove at the relief port while opening and closing the relief flow path, that is, two opening and closing switches are arranged in the whole flow path, and only when both the two opening and closing switches are opened can the relief function be realized, so that the pump has better sealing performance when working, and has greater pressure difference when relieving to prevent the flow path from being blocked, thereby improving the reliability of the pump valve.

[0011] In one of the embodiments, the output groove and the relief groove are arranged between the output flow path and the relief flow path.

[0012] By adopting the technical scheme, the output groove and the pressure relief groove are arranged between the output flow path and the pressure relief flow path, so that the fluid needs to be controlled by the opening and closing of the output flow path and the pressure relief flow path first when moving in the flow path, and then be controlled by the opening and closing of the pressure relief port, thereby reasonably distributing the logical position relationship of the two opening and closing switches in the flow path.

[0013] In one of the embodiments, a boss is arranged in the first flow channel, and the boss is configured to separate the output groove and the pressure relief groove.

[0014] By adopting the technical scheme, the boss is used to separate the output groove and the pressure relief groove, so as to block the communication between the output flow path and the pressure relief flow path.

[0015] In one of the embodiments, the valve function piece further includes a second valve piece, and the second valve piece covers one side of the boss facing the diaphragm seat.

[0016] By adopting the technical scheme, when the pressure in the pump function cavity is greater than the pressure in the valve function cavity, the second valve piece is tightly attached to the boss, so as to close the output flow path and the pressure relief flow path. When the pressure in the pump function cavity is less than the pressure in the valve function cavity, the second valve piece is separated from the boss, so as to realize the communication between the output flow path and the pressure relief flow path.

[0017] In one of the embodiments, the second flow channel is provided with a first pump groove and a second pump groove, the first pump groove communicates the second pump groove and the pressure relief flow path, the first valve piece covers an opening on one side of the first pump groove facing the pump cover, and the second valve piece covers an opening on one side of the second pump groove facing the pump cover.

[0018] By adopting the technical scheme, the first pump groove, the pressure relief port and the first valve piece constitute a first opening and closing switch, the second pump groove, the pressure relief groove, the output groove and the second valve piece constitute a second opening and closing switch, and the first pump groove and the second pump groove correspond to different opening and closing switches respectively, so as to control the pressure of the pump function cavity in the two opening and closing switches.

[0019] In one of the embodiments, the input flow path includes an input channel formed on one side of the diaphragm seat away from the function piece and an input hole penetrating the diaphragm seat, the input hole communicates the input channel and the output flow path, and the pressure relief flow path includes a pressure relief channel formed on one side of the diaphragm seat away from the function piece and a pressure relief hole penetrating the diaphragm seat, the pressure relief hole communicates the pressure relief channel and the second flow channel.

[0020] By adopting the technical scheme, the fluid enters the output flow path through the input channel and the input hole, and the fluid enters the second flow channel through the pressure relief channel and the pressure relief hole, thereby simplifying the structure of the input flow path and the pressure relief flow path, reducing the volume of the pump head, and improving the adaptability of the pump head.

[0021] The application also provides a fluid pump comprising the pump head as described above.

[0022] In one of the embodiments, the fluid pump body further comprises a pump body and a driving mechanism, the pump body comprises a cup cavity in one-way communication with the suction flow path and the stop flow path, and the driving mechanism is in transmission connection with the cup cavity to force the cup cavity to deform and drive the fluid in the cup cavity to enter the suction flow path and the stop flow path.

[0023] By using the technical scheme, the driving mechanism drives the fluid in the cup cavity of the pump body to enter the suction flow path and the stop flow path of the pump head, so that the pressure of the pump function cavity is greater than the pressure of the valve function cavity, the valve function piece disconnects the output flow path and the pressure relief flow path, the fluid enters the working cavity through the output flow path, and the pump function is realized. When the driving mechanism stops working, the fluid is no longer pumped into the pump head, the fluid in the working cavity flows back, so that the pressure of the pump function cavity is less than the pressure of the valve function cavity, the valve function piece connects the output flow path and the pressure relief flow path, the fluid is discharged to the outside through the pressure relief flow path, and the pressure relief function is realized.

[0024] In summary, the application at least has the following beneficial technical effects:

[0025] 1. The fluid has two independent flow paths in the pump head, which respectively realize the pump function and the valve function, and on the basis of realizing the pump-valve integration, the flow path structure is optimized, and the problem of low reliability caused by the mutual correlation of the pump-valve flow paths in the traditional technology is solved.

[0026] 2. When the pump works, the input flow path and the stop flow path synchronously transport the fluid, so that the pressure in the pump function cavity is always greater than the pressure in the valve function cavity, the pressure on both sides of the valve function piece is gradually and stably increased, and the valve function piece is prevented from being damaged due to the excessively large pressure difference on both sides.

[0027] 3. By arranging the output groove and the pressure relief groove in the first flow channel, and arranging the corresponding second valve piece and the second pump groove to form the opening and closing switch of the pressure relief flow path and the output flow path, when the fluid is pumped and the pressure relief function is converted, the opening and closing switch needs to be opened and closed first, so as to further improve the reliability of the valve in the pump-valve structure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural explosion diagram of the first perspective of the pump head in one embodiment of the application;

[0029] Figure 2 It is a structural explosion diagram of the second perspective of the pump head in one embodiment of the application;

[0030] Figure 3 It is a structural explosion diagram of the first perspective of the fluid pump in one embodiment of the application;

[0031] REFERENCE SIGNS

[0032] 10, pump head; 20, pump body; 30, driving mechanism; 100, pump cover; 200, diaphragm seat; 300, functional piece; 110, output flow path; 120, pressure relief flow path; 130, valve function cavity; 131, pressure relief groove; 132, output groove; 1311, boss; 210, input flow path; 211, input hole; 220, stop flow path; 221, stop hole; 230, pump function cavity; 231, first pump groove; 232, second pump groove; 310, input check valve piece; 320, stop check valve piece; 330, valve function piece; 331, first valve piece; 332, second valve piece. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific embodiments described and claimed herein. It is therefore intended that the present application not be limited in scope to the specific embodiments disclosed but rather that the scope of the present application be measured by the broadest permissible interpretation of the claims.

[0034] Please refer to Figure 1 and Figure 2 , Figure 1 Fig. 1 shows a structural schematic diagram of a first perspective view of a pump head 10 in an embodiment of the present application, Figure 2 Fig. 2 shows a structural schematic diagram of a second perspective view of the pump head 10 in the embodiment of the present application. The pump head 10 provided by the embodiment of the present application includes a pump cover 100, a diaphragm seat 200, and a functional piece 300 disposed between the pump cover 100 and the diaphragm seat 200. Two mutually independent flow paths are provided in the pump head 10, which are respectively used to realize the functions of pumping fluid and pressure relief.

[0035] The pump cover 100 is provided with an output flow path 110, a pressure relief flow path 120, and a first flow channel selectively connecting the output flow path 110 and the pressure relief flow path 120. Specifically, an output port and a pressure relief port are provided on one side of the pump cover 100. One end of the output port is connected to the working bladder cavity, and the other end of the output port is disposed on the side of the pump cover 100 away from the output port. The output flow path 110 is formed in the output port. One end of the pressure relief port is connected to the outside, and the other end of the pressure relief port is disposed on the side of the pump cover 100 away from the pressure relief port. The pressure relief flow path 120 is formed in the pressure relief port.

[0036] The first flow channel is arranged on the side of the pump cover 100 away from the output port and the pressure relief port. Specifically, the first flow channel includes an output groove 132 and a pressure relief groove 131, the output groove 132 is in communication with the output flow path 110, and the pressure relief groove 131 is in communication with the pressure relief flow path. A boss 1311 is arranged between the output groove 132 and the pressure relief groove 131, which is used to separate the output groove 132 and the pressure relief groove 131 to achieve the blocking of the communication between the output flow path 110 and the pressure relief flow path 120.

[0037] Specifically, in the embodiment, the output groove 132 includes an output portion in communication with the output port, a communication portion arranged near the boss 1311, and a buffer portion arranged between the output portion and the communication portion. The output portion covers the output port and is arranged around the output port to accommodate the fluid flowing in the output port. The two sides adjacent to the boss 1311 of the communication portion are arranged in an arc shape to increase the length of the side adjacent to the boss 1311. To increase the communication space when the output groove 132 and the pressure relief groove 131 are in communication. The buffer portion is arranged in a rounded rectangle shape, and the length of the rectangle is approximately equal to the length between the output port and the pressure relief port, so as to increase the occupied space of the buffer portion and improve the buffering capacity. The pressure relief groove 131 is similar in structure to the output groove 132 and is centrally symmetrically arranged, which will not be described here.

[0038] The diaphragm seat 200 is provided with an input flow path 210, a pressure relief flow path 220, and a second flow channel. The input flow path 210 is used to input fluid from the pump body 20, and the fluid finally flows to the output flow path 110 of the pump cover 100 and enters the working cavity. The pressure relief flow path 220 is also used to input fluid from the pump body 20, and the fluid finally flows into the second flow channel on the diaphragm seat 200 and gradually accumulates in the second flow channel.

[0039] Specifically, the second flow channel includes a first pump groove 231 and a second pump groove 232, which are arranged on the side of the diaphragm seat 200 facing the pump cover 100. The first pump groove 231 is in communication with the second pump groove 232 and the pressure relief flow path 220, so that the fluid in the pressure relief flow path 220 can flow into the first pump groove 231 and the second pump groove 232. Specifically, in this embodiment, the first pump groove 231 and the second pump groove 232 are both circular in shape to match the shape of the corresponding structures on the functional part 300 and the pump cover 100. A rectangular communication groove is provided between the first pump groove 231 and the second pump groove 232 to avoid the structure on the side of the diaphragm seat 200 away from the pump cover 100.

[0040] The input flow path 210 and the relief flow path 220 are arranged on the side of the diaphragm seat 200 away from the pump cover 100. Specifically, the input flow path 210 includes an input channel and an input hole 211 connecting the input channel and an output channel, and the relief flow path 220 includes a relief channel and a relief hole 221 connecting the relief channel and the relief channel. A one-way valve is arranged at the inlet of the input channel and the relief channel to limit the flow direction of the fluid and realize the pump function.

[0041] Specifically, in the embodiment, the input hole 211 and the relief hole 221 are arranged through the diaphragm seat 200, and the input hole 211 and the relief hole 221 are arranged on opposite sides of the diaphragm seat 200 to correspond to two different fluid conveying structures. The inlets of the input channel and the relief channel are arranged on the diaphragm seat 200 at positions not coinciding with the fluid conveying structure.

[0042] The functional piece 300 is provided with an input one-way valve piece 310, a relief one-way valve piece 320, and a valve function piece 330. The valve function piece 330 and the first flow channel jointly form a valve function cavity 130, and the valve function piece 330 and the second flow channel jointly form a pump function cavity 230. The input one-way valve piece 310 one-way communicates with the output flow path 110 to prevent fluid from entering the pump body 20 in the reverse direction through the input one-way valve piece 310 instead of the relief flow path 120 when the pump stops working, thereby preventing fluid leakage. The relief one-way valve one-way communicates with the second flow channel to prevent the pressure in the second flow channel from entering the pump body 20 in the reverse direction during the pump pressure or relief process, thereby preventing the pressure in the pump function cavity 230 from being unstable.

[0043] The valve function piece 330 is a resilient piece to realize the communication or disconnection of the output flow path 110 and the relief flow path according to the relative pressure of the valve function cavity 130 and the pump function cavity 230 on both sides of the valve function piece 330. Specifically, the valve function piece 330 includes a first valve piece 331 and a second valve piece 332. The first valve piece 331, the relief port, and the first pump groove 231 correspond in position. When the pressure in the pump function cavity 230 corresponding to the first pump groove 231 is greater than the pressure in the valve function cavity 130 corresponding to the relief port, the first valve piece 331 is pressed against and covers the relief port, and the fluid in the valve function cavity 130 cannot be discharged through the relief port, thereby preventing fluid leakage from the relief port during pump operation. When the pressure in the pump function cavity 230 corresponding to the first pump groove 231 is less than the pressure in the valve function cavity 130 corresponding to the relief port, the first valve piece 331 is separated from the relief port, and the fluid in the valve function cavity 130 can be discharged to the outside through the relief port, thereby realizing stable relief function.

[0044] The positions of the second valve piece 332, the boss 1311 and the second pump groove 232 correspond to each other. When the pressure in the pump function cavity 230 corresponding to the second pump groove 232 is greater than the pressure in the valve function cavity 130 corresponding to the boss 1311, the second valve piece 332 is pressed against the boss 1311 toward one side of the diaphragm seat 200, and the fluid in the output groove 132 cannot flow into the pressure relief groove 131, and thus cannot flow from the pressure relief groove 131 to the pressure relief port and be discharged to the outside, thereby further improving the sealing of the pump head 10 when pumping fluid, preventing fluid leakage. When the pressure in the pump function cavity 230 corresponding to the second pump groove 232 is less than the pressure in the valve function cavity 130 corresponding to the boss 1311, the fluid in the output groove 132 lifts the second valve piece 332, and the fluid can flow from the output groove 132 to the pressure relief groove 131 through the gap between the boss 1311 and the second valve piece 332, thereby connecting the output flow path 110 and the pressure relief flow path 120, and further stabilizing the pressure relief condition.

[0045] In this embodiment, the valve function piece 330 is made of rubber, which has good sealing performance, plasticity and low material cost.

[0046] The fluid has two independent flow paths in the pump head 10. The first flow path is that the fluid enters the output flow path 110 from the input flow path 210 through the input one-way valve piece 310, and finally flows into the sealed working bladder cavity to realize the functions of pumping and pressure relief. Specifically, the fluid enters the fluid conveying structure from the input channel on the diaphragm seat 200, passes through the input hole 211 into the valve function cavity 130 on the output flow path 110, and then flows into the working bladder cavity to realize the pumping function.

[0047] The second flow path is for fluid to enter the pump function cavity 230 from the leak-off flow path 220 through the leak-off check valve 320, and is used to realize the valve function of the first flow path by controlling the pressure. When the pump is working, because the fluid in the valve function cavity 130 flows into the working bladder cavity, and the fluid in the pump function cavity 230 continues to accumulate, the pressure in the pump function cavity 230 is greater than the pressure in the valve function cavity 130, the relief port is tightly blocked by the first valve plate 331, the boss 1311 at the connection between the output groove 132 and the relief groove 131 is tightly blocked by the second valve plate 332, the fluid in the output flow path 110 cannot move into the relief groove 131, and cannot be discharged through the relief port, thereby ensuring the airtightness when the pump is working. In this process, as the fluid in the working bladder cavity accumulates, the pressure rises, the pressure in the valve function cavity 130 also rises, and the pressure in the pump function cavity 230 also rises synchronously, and the pressure in the pump function cavity 230 is always greater than the pressure in the valve function cavity 130, so that the pressure difference between the two sides of the first valve plate 331 and the second valve plate 332 is maintained within a certain range, so that the first valve plate 331 and the second valve plate 332 do not deform excessively, and the service life of the elastic material is reduced.

[0048] When the pump stops working, the fluid in the working bladder cavity flows reversely, and the fluid accumulates in the output groove 132 of the valve function cavity 130 because it cannot be discharged through the input check valve, forcing the second valve plate 332 to open the passage between the output groove 132 and the relief groove 131, and further forcing the first valve plate 331 to open the passage at the relief port, so that the fluid in the working bladder cavity is sequentially discharged to the outside through the output flow path 110, the output groove 132, the relief groove 131, and the relief port, realizing the pressure relief function. In this process, as long as the pressure in the valve function cavity 130 is greater than the pressure in the pump function cavity 230, the communication between the output flow path 110 and the relief flow path 120 can be stably maintained, ensuring the stability of the pressure relief.

[0049] Please refer to the accompanying Figure 3 , Figure 3 A structure schematic diagram of the first perspective of the fluid pump in an embodiment of the present application is shown. The present application also provides a fluid pump, which comprises a driving mechanism 30, a pump body 20, and a pump head 10 as described above. The pump body 20 comprises a cup capsule in one-way communication with the suction flow path and the leak-off flow path 220, and the driving mechanism 30 is drivingly connected to the cup capsule to make the cup capsule deform, so as to drive the fluid in the cup capsule to enter the suction flow path and the leak-off flow path 220.

[0050] Specifically, the cup capsule is arranged on the side of the diaphragm seat 200 away from the pump cover 100 through a diaphragm seat, and a flow channel for one-way communication between the cup capsule and the outside is arranged on the diaphragm seat, so as to make the fluid from the outside enter the cup capsule. The cup capsule is configured as an elastic member, and when the cup capsule is compressed and stretched to deform, the fluid in the cup capsule flows into the suction flow path and the leak-off flow path 220.

[0051] Specific to the embodiment, the cup capsules include two, one of which is arranged at a position corresponding to the first pump groove 231, for pumping fluid into the check flow path 220. The other is arranged at a position corresponding to the second pump groove 232, for pumping fluid into the input flow path 210. By pumping fluid into the input flow path 210 and the check flow path 220 independently through two different cup capsules, the independence of the two fluid flow paths can be achieved.

[0052] The driving mechanism 30 includes a driving motor and an eccentric rocker structure connected to the driving motor. Specifically, the eccentric rocker structure includes an eccentric wheel fixed coaxially with the output shaft of the driving motor, a rocker arranged on the eccentric wheel, and the two ends of the rocker connected to the two cup capsules away from the pump cover 100. The driving motor drives the eccentric rocker structure to make periodic reciprocating motion, so that the cup capsules periodically deform to pump fluid.

[0053] The pump head 10 and the fluid pump provided by the application have the following implementation principle: the driving motor drives the cup capsules to deform to pump fluid, and the fluid enters from the input flow path 210 and the check flow path 220. The fluid in the input flow path 210 flows to the output flow path 110 and enters the working capsule cavity. The fluid in the check flow path 220 enters the pump function cavity 230, so that the pressure in the pump function cavity 230 is greater than the pressure in the valve function cavity 130, and the valve function sheet 330 disconnects the connection between the output flow path 110 and the pressure relief flow path 120. When pumping fluid, it prevents fluid from leaking from the pressure relief flow path 120. When the pump stops working, the fluid in the working capsule cavity flows back, causing the pressure in the pump function cavity 230 to be less than the pressure in the valve function cavity 130, and the valve function sheet 330 connects the output flow path 110 and the pressure relief flow path 120. The fluid in the working capsule cavity is discharged to the outside through the output flow path 110 and the pressure relief flow path 120, achieving stable pressure relief.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0055] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0056] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0058] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0059] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present application.

[0060] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A pump head, characterized by include: A pump cover (100), wherein the pump cover (100) is provided with an output flow path (110), a pressure relief flow path (120), and a first flow channel selectively connecting the output flow path (110) and the pressure relief flow path (120); a diaphragm seat (200), wherein an input flow path (210), a leakage-stopping flow path (220), and a second flow channel are provided on the diaphragm seat (200), wherein the input flow path (210) is connected to the output flow path (110), and the leakage-stopping flow path (220) is connected to the second flow channel; A functional component (300) is provided between the pump cover (100) and the diaphragm seat (200), and the functional component (300) is provided with an input one-way valve plate (310), a leak-stop one-way valve plate (320), and a valve function plate (330). The input one-way valve plate (310) connects the input flow path (210) and the output flow path (110) in a one-way manner along the fluid input direction. The leak-stop one-way valve connects the leak-stop flow path (220) and the second flow path in a one-way manner along the fluid input direction. The valve function plate (330) and the first flow path together form a valve function cavity (130). The valve function plate (330) and the second flow path together form a pump function cavity (230). The valve function plate (330) selectively connects the output flow path (110) and the pressure relief flow path (120) according to the pressure of the valve function cavity (130) and the pump function cavity (230). An output groove (132) and a pressure relief groove (131) are provided in the first flow channel, the pressure relief groove (131) is connected to the pressure relief flow path (120), and the output groove (132) is connected to the output flow path (110) and the pressure relief flow path (120), and the valve function piece (330) is used to open and close the pressure relief flow path (120) while opening and closing the connection between the output groove (132) and the pressure relief groove (131); a boss (1311) is provided in the first flow channel, and the boss (1311) is configured to separate the output groove (132) and the pressure relief groove (131); The valve function plate (330) includes a first valve plate (331) and a second valve plate (332); the pressure relief flow path (120) includes a pressure relief port communicating with the outside; the valve function plate (330) is capable of generating elastic deformation to block or communicate with the pressure relief port; the second valve plate (332) covers the side of the boss (1311) facing the diaphragm seat (200); A first pump groove (231) and a second pump groove (232) are provided in the second flow channel, the first pump groove (231) is connected to the second pump groove (232) and the leakage-stopping flow path (220), the first valve plate (331) covers an opening of the first pump groove (231) facing the pump cover (100), and the second valve plate (332) covers an opening of the second pump groove (232) facing the pump cover (100).

2. The pump head of claim 1, wherein The output groove (132) and the pressure relief groove (131) are arranged between the output flow path (110) and the pressure relief flow path (120).

3. The pump head of claim 1, wherein The input flow path (210) comprises an input channel formed on the diaphragm seat (200) away from the functional part (300) and an input hole (211) passing through the diaphragm seat (200), the input hole (211) being communicated with the input channel and the output flow path (110), the leak stopping flow path (220) comprises a leak stopping channel formed on the diaphragm seat (200) away from the functional part (300) and a leak stopping hole (221) passing through the diaphragm seat (200), the leak stopping hole (221) being communicated with the leak stopping channel and the second flow path.

4. A fluid pump characterized by, The pump head (10) as claimed in any one of claims 1-3.

5. The fluid pump of claim 4, wherein, Further comprising a pump body (20) comprising a cup capsule communicated with the suction flow path and the leak stopping flow path (220) in one direction, and a driving mechanism (30) drivingly connected with the cup capsule to force the cup capsule to deform and drive the fluid in the cup capsule to enter the suction flow path and the leak stopping flow path (220).

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