Valve and fluid pump

Abstract

The utility model relates to the technical field of electrically driven pumps, in particular to a valve and a fluid pump, which comprise a bottom plate with a bottom plate hole part, a cover plate with a cover plate hole part, a valve plate and a support plate with an air leakage channel, the bottom plate, the support plate and the cover plate are sequentially stacked, the middle of the support plate is hollowed out, so that a valve chamber is formed between the bottom plate and the cover plate, and the valve plate is arranged in the valve chamber. The valve plate is arranged in the valve chamber, the thickness of the valve plate is smaller than that of the supporting plate, an air leakage gap is formed, the air leakage channel is communicated with the valve chamber and the air leakage gap and arranged on the periphery of the supporting plate, at least one unclosed parting line is arranged on the valve plate, and the valve plate can deform under the blowing action of air, so that an air port is formed in the area where the parting line is located. The bottom plate hole part, the cover plate hole part and the air port are oppositely arranged, a movable valve is formed in the area where the parting line is located, and the valve and the valve plate part are connected to form a connecting line. According to the valve, through the air inlet valve, the air outlet valve and the valve which are oppositely arranged, the miniaturization, lightening and thinning of a product are achieved, meanwhile, plugging and air leakage of a lateral gap are conducted, the air leakage speed is high, the risk of plugging failure is reduced, and the product reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pump with electric drive, especially to a valve and fluid pump. BACKGROUND

[0002] The advent of wrist type, arm type sphygmomanometers and other intelligent wearable devices greatly facilitates people's life, and thus is favored by the market, and the miniature air pump and air release valve as the core components thereof also attract extensive attention in the industry. Improving the performance of the miniature air pump and air release valve becomes a key factor for improving the performance of the product. The air release valve applied in the intelligent wearable device is mostly of diaphragm structure in order to realize miniaturization in structure, and the diaphragm is deformed due to the flow of fluid, thereby dividing the internal space of the housing into an air inlet side and an air outlet side.

[0003] According to the search, the patent with the publication number CN117280149A discloses a valve, a fluid control device, a pressurizing device and a sphygmomanometer, which communicates the first wall side space and the second wall side space through a communication path, can inhibit the change of the flow path cross-sectional area and the flow velocity of the first flow path to inhibit the vibration of the membrane. However, it is found in actual use that when the pump stops power supply and reversely releases air, the gas can only be discharged through the hole 790, and due to the limited flow area, the air release speed is slow, which causes poor user experience for the wrist type, arm type sphygmomanometer and the massage industry, and at the same time, the structure of single-hole air release greatly increases the risk of blockage once impurities enter, and the reliability is low; when the pump is powered on and works in the forward air outlet mode, the gas needs to pass through two bends after pushing away the valve piece 80 to flow out from the hole 800, which increases the resistance along the path and the local resistance, and causes the attenuation of the output gas pressure and flow of the air pump. UTILITY MODEL CONTENTS

[0004] In order to solve the problem of slow air release speed and easy blockage due to the limited flow area of the existing single-hole air release, the utility model provides a valve and fluid pump, which realizes the product miniaturization and thinning, blocks the lateral gap and releases air through the opposing air inlet, air outlet and movable valve, has fast air release speed, reduces the risk of blockage failure, and improves the product reliability.

[0005] This utility model provides a valve, comprising a base plate with a bottom plate hole, a cover plate with a cover plate hole, a valve plate, and a support plate with at least one venting channel. The base plate, support plate, and cover plate are stacked sequentially. The middle of the support plate is hollowed out, forming a valve chamber between the base plate and the cover plate. The valve plate is placed in the valve chamber and its thickness is less than the height of the valve chamber, forming a venting gap. The venting channel communicates with the valve chamber and the venting gap and is located on the outer periphery of the support plate. The valve plate has at least one unclosed dividing line. The valve plate can expand and deform under the action of gas blowing, so that the area where the dividing line is located forms an air port. The bottom plate hole, the cover plate hole, and the air port are opposite each other. By setting the dividing line on the valve plate, the forward flow of gas is achieved, while the reverse flow of gas can be completely prevented from entering or can only enter very little between the base plate and the valve plate, that is, it does not affect the sealing of the bottom plate hole by the valve plate, thus ensuring the normal use of the valve.

[0006] Furthermore, a movable valve forms in the area where the dividing line is located. The valve is partially connected to the valve plate to form a connecting line. The dividing line and the connecting line are joined end to end to form a closed line, and the length of the dividing line is not less than the length of the connecting line. In the initial state, the valve and the valve plate are on the same plane. The valve will only open to form an air vent when the valve plate deforms, allowing gas to flow.

[0007] Furthermore, the valve disc is circular, and from the center outwards, it includes a flow area, a blocking area, and an adhesive area. The valve disc is fixed to the base plate through the adhesive area. The blocking area is used to circumferentially block the venting gaps of the support plate, and the valve is located in the flow area. The flow area, blocking area, and adhesive area are concentrically arranged. The thickness of the blocking area is less than the thickness of the support plate, forming a venting gap in the valve chamber. Thus, when gas flows in forward, the blocking area can completely block the circumferential venting gap.

[0008] Furthermore, the bottom plate orifice can be a single hole located at the center of the bottom plate or a group of holes located at the center of the bottom plate. When gas flows in the reverse direction, even if the valve is opposite to the bottom plate orifice, it will not affect the normal venting process.

[0009] Furthermore, the bottom plate orifice is annular, and the middle area of ​​the annular bottom plate orifice forms a sealing plate opposite to the flow area. During the venting process, the valve plate adheres to the bottom plate due to the thrust of the reverse airflow. At this time, the valve area is in close contact with the sealing plate, which can effectively prevent gas from flowing back into the pump body from the valve.

[0010] Furthermore, the bottom plate has several air inlets, which are evenly distributed circumferentially around the center of the valve plate. This ensures that the valve plate is evenly stressed, completely sealing any circumferential venting gaps to prevent gas leakage.

[0011] Furthermore, the air intake can be a fan-shaped hole, a curved waist-shaped hole, or a curved square hole. A circular valve plate combined with a curved strip-shaped air intake provides better sealing or intake performance.

[0012] Further, the valve plate is fixed on the bottom plate outside the bottom plate hole by the bonding area, so that the flow area and the blocking area of the valve plate are attached to the bottom plate; when the gas flows from the bottom plate hole, the flow area and the blocking area of the valve plate attached to the bottom plate are elastically deformed to the side of the cover plate and attached to the periphery of the cover plate hole, thereby blocking the air leakage gap and blocking the gas flow to the valve chamber, and further preventing the gas from flowing out of the air leakage groove; when the gas flows reversely from the cover plate hole, the air port is closed, and under the push of the reversely flowing gas, the flow area and the blocking area of the valve plate move to the side of the bottom plate, the valve plate is pushed against the bottom plate and blocks the bottom plate hole, the air leakage gap is opened, at this time, the gas is discharged from the air leakage groove through the air leakage gap and the valve chamber, and the air leakage function is realized. When the height of the support plate is appropriately greater than the thickness of the valve plate and a proper air leakage gap space is formed, the air leakage speed is fast and the effect is good.

[0013] Further, the side of the blocking plate facing the valve plate is provided with a boss, and the diameter of the boss is less than the inner diameter of the annular bottom plate hole. The blocking effect of the bottom plate hole during air leakage can be optimized, and of course the boss can also be provided on the valve plate.

[0014] Further, the side of the cover plate facing the valve plate is provided with a convex ring, and the convex ring is arranged outside the cover plate hole. The blocking effect of the air leakage gap and the air leakage groove during forward air outlet can be optimized, and of course the convex ring can also be arranged on the valve plate.

[0015] A fluid pump comprises a pump and a valve, the pump and the valve share a bottom plate, and the pump has a pump chamber communicating with a bottom plate hole. The gas flow in the valve is controlled by the pump, and the area of the air leakage groove in the valve is increased, so that the airflow howling is not easy to occur, and the noise is reduced.

[0016] The beneficial effects of the utility model lie in:

[0017] The utility model provides a valve and a fluid pump,

[0018] (1) air is discharged through the lateral gap, the air discharge area is greatly increased, the air discharge speed is improved, and the utility model is more suitable for wrist type, arm type sphygmomanometers and massage instruments to meet better user experience, and can also reduce the risk of failure caused by impurities, thereby improving the reliability of the product;

[0019] (2) By the bottom plate hole part, cover hole part and gas port opposite, thickness size can be very small, at the same time less parts, simple structure, in thickness is only other kinds of air release valve half, assembly is convenient, low in cost, and the movement distance of gas flow in the valve body is extremely short, the along distance loss is small, there is no more flow channel structure causing local loss, therefore the flow resistance of the valve body is small, the valve piece is mostly supported by the bottom plate and the cover plate during the movement process, the response time of the valve body is very short, the real-time performance of the finished product output is guaranteed, the movement size of the valve piece is small, the deformation is small, it is not easy to damage, greatly improve the reliability of the product, more in line with the trend of small, light and thin of 3C, personal wearing and other industries;

[0020] (3) By changing the gas hole on the traditional valve piece into a movable valve, when the gas flows reversely from the cover hole part, the gas cannot enter or can hardly enter between the bottom plate and the valve piece, that is, the valve piece can be guaranteed to be attached to the bottom plate and complete the sealing of the bottom plate hole part, thereby effectively preventing the reverse flow of the gas and improving the sealing performance of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a structural diagram of the existing valve;

[0023] Figure 2 is a cross-sectional view of the existing valve in the pump power-off state (the arrow represents the gas flow direction);

[0024] Figure 3 is a schematic view of a plurality of division lines;

[0025] Figure 4 is a schematic view of the valve piece in the static state;

[0026] Figure 5 is a schematic view of the valve piece in the bulging state;

[0027] Figure 6 is a cross-sectional view of the valve in the static state;

[0028] Figure 7 is a cross-sectional view of the valve in the pump power-on state (the arrow represents the gas flow direction);

[0029] Figure 8 is a cross-sectional view of the valve in the pump power-off state (the arrow represents the gas flow direction);

[0030] Figure 9 is the schematic view of the bottom plate hole part without the blocking plate;

[0031] Figure 10 is the schematic view of the bottom plate hole part with the blocking plate;

[0032] Figure 11 is the schematic view of the bottom plate with the boss;

[0033] Figure 12 is the schematic view of the cover plate with the convex ring;

[0034] Figure 13 is the structural schematic view of the fluid pump;

[0035] Fig. 1. bottom plate, 11. bottom plate hole part, 12. blocking plate, 13. boss, 2. valve piece, 21. division line, 22. valve, 23. flow-through area, 24. blocking area, 25. bonding area, 26. valve piece hole part, 3. support plate, 31. air release channel, 32. valve chamber, 33. air release gap, 4. cover plate, 41. cover plate hole part, 42. convex ring, 5. pump, 51. pump chamber. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments.

[0037] As shown in Figure 1 and 2 , it is the structure of the existing single-hole air release valve, which comprises a bottom plate 1 with a bottom plate hole part 11, a cover plate 4 with a cover plate hole part 41, a valve piece 2, and a support plate 3 with an air release channel 31. The bottom plate 1, the support plate 3, and the cover plate 4 are sequentially stacked, the middle part of the support plate 3 is hollowed out, so that the valve chamber 32 is formed between the bottom plate 1 and the cover plate 4, the valve piece 2 is placed in the valve chamber 32 and the thickness is less than the height of the valve chamber 32, forming the air release gap 33, the air release channel 31 communicates with the valve chamber 32 and the air release gap 33 and is arranged on the outer peripheral part of the support plate 3.

[0038] When pump 5 is powered on, gas enters the bottom plate hole 11 from the outlet of pump chamber 51, pushing valve plate 2 to adhere to the plane around the cover plate hole 41, closing the vent gap 33, and achieving lateral sealing. Compared with the previous sealing hole, the lateral sealing here is the entire annular height space of the vent gap 33, that is, the gap between the bottom plate 1 and the cover plate 4. At this time, gas cannot flow from the vent channel 31 of the support plate 3 to the external space, but can only flow out from the cover plate hole 41 of the cover plate 4 and be injected into the external air bag. When pump 5 is powered off and stops working, the gas in the air bag is released under the action of the air bag elasticity. The gas flows in the opposite direction from the cover plate hole 41, pushing valve plate 2 to adhere to its opposite sealing plate 12, achieving sealing of valve plate hole 26, and opening the vent gap 33. At this time, gas cannot flow to the pump outlet through the valve plate hole 26 on valve plate 2, but can only flow out from the lateral vent gap 33 and vent channel 31.

[0039] Specifically, the valve plate 2 has a valve plate hole 26 at the center position. When gas flows in the reverse direction from the cover plate hole 41 to release gas, some gas will flow into the space between the valve plate 2 and the base plate 1 through the valve plate hole 26, causing the valve plate 2 to bulge towards the cover plate 4. The gas release gap 33 cannot be fully opened, which seriously reduces the gas release speed, prolongs the gas release time, and thus affects the normal use of the fluid pump 5.

[0040] To solve the above problems, this technical solution requires a change to the structure of the existing valve plate hole 26. This ensures that when gas flows in the reverse direction from the cover plate hole 41, very little or no gas flows into the space between the valve plate 2 and the base plate 1 through the valve plate hole 26. This allows the valve plate 2 and the base plate 1 to fit together completely and the venting gap 33 to be fully opened. At this time, the gas can only be discharged from the circumferential venting gap 33 and the venting channel 31, ensuring the normal operation of the pump 5.

[0041] The core of this technical solution lies in, for example Figure 3 As shown, the original valve plate hole 26 is removed, and at least one unclosed dividing line 21 is provided on the valve plate 2. The valve plate 2 can deform under the push of gas, so that the area where the dividing line 21 is located forms an air port. The bottom plate hole 11, the cover plate hole 41 and the air port are opposite each other. There can be one or more dividing lines 21. When a single dividing line 21 is unclosed, multiple dividing lines 21 that do not intersect can form multiple independent air ports. The dividing line 21 can be a regular straight line, or an irregular curve or broken line, such as S-shaped, L-shaped, V-shaped, etc., or other unclosed geometric shapes.

[0042] Thus, when the pump 5 is powered on, the gas from the pump chamber 51 outlet enters the bottom plate hole part 11, pushes the valve sheet 2 to elastically deform and attach to the plane around the cover plate hole part 41, so that the valve sheet 2 blocks the lateral blocking area 24 of the circumferential gas leakage gap 33, and the deformation of the valve sheet 2 makes the split line 21 on it expand and form a gas port. At this time, the gas cannot flow from the gas leakage groove 31 of the support plate 3 to the outside space, but can only flow out from the cover plate hole part 41 of the cover plate 4 through the gas port on the valve sheet 2; when the pump 5 is powered off, the gas flows reversely from the cover plate hole part 41, continuously pushes the blocking area 24 on the valve sheet 2 attached around the cover plate hole part 41 against the bottom plate 1, and the gas leakage gap 33 is opened. Because the valve sheet 2 has elasticity, after deformation reset, the gas port returns to the state of the split line 21, that is, the gas port is closed, so the reversely flowing gas cannot enter between the valve sheet 2 and the bottom plate 1, which can ensure that the valve sheet 2 is completely attached to the bottom plate 1. At this time, the gas can only be discharged from the circumferential gas leakage groove 31 through the gas leakage gap 33.

[0043] As shown in Figure 4 and 5 , preferably, the area where the split line 21 is located forms a movable valve 22, the valve 22 is partially connected with the valve sheet 2 and forms a connection line, the split line 21 and the connection line are connected end to end to form a closed line, and the length of the split line 21 is not less than the length of the connection line. The valve 22 is movably arranged on the valve sheet 2. When the valve sheet 2 is pushed to deform by the gas, the valve 22 is opened to form a gas port. When the valve sheet 2 is not blown by the gas, the valve 22 is in the same plane with the valve sheet 2, the gas port is closed, and the split line 21 is arranged without causing the absence of the material of the valve sheet 2. The valve 22 has good sealing performance in the closed state, so that the gas cannot flow into between the valve sheet 2 and the bottom plate 1, thereby ensuring that the valve sheet 2 is attached to the bottom plate 1, that is, ensuring that the gas is quickly discharged from the circumferential gas leakage gap 33 and the gas leakage groove 31 of the support plate 3 during the gas leakage process.

[0044] As shown in Figure 4 and 6 , preferably, the valve sheet 2 is circular, and the valve sheet 2 includes, from the center of the circle outward, a flow-through area 23, a blocking area 24, and a bonding area 25. The valve sheet 2 is fixed to the bottom plate 1 through the bonding area 25, the blocking area 24 is used to circumferentially block the gas leakage gap 33 of the support plate 3, and the valve 22 is arranged in the flow-through area 23. The valve sheet 2 is arranged in the valve chamber 32 and has a thickness less than the height of the valve chamber 32, forming the gas leakage gap 33. When the pump 5 is not powered on, the valve sheet 2 is tightly attached to the bottom plate 1, the valve chamber 32 is communicated with the gas leakage gap 33 and the gas leakage groove 31, and the gas leakage gap 33 can be regarded as a part of the valve chamber 32. The thickness of the support plate 3 (that is, the gap between the bottom plate 1 and the cover plate 4) is extremely important, which determines the space for the up-and-down movement of the valve sheet 2. The size of the blocking area 24 for blocking the circumferential gas leakage gap 33 and the gas leakage groove 31 of the support plate 3 is reasonably set according to the actual thickness of the support plate 3.

[0045] As shown in Figure 7 when the gas flows from the bottom plate hole part 11, the flow-through area 23 and the plugging area 24 of the valve piece 2 attached to the bottom plate 1 elastically deform to the cover plate 4 side, so that the plugging area 24 plugs the circumferential gas leakage gap 33 and the gas leakage groove 31, so that the valve 22 of the flow-through area 23 is opened to form a gas port, and the gas port is communicated with the cover plate hole part 41, at this time, the gas is discharged from the cover plate hole part 41; as shown in Figure 8 when the gas flows reversely from the cover plate hole part 41, the valve piece 2 is pushed against the bottom plate 1 and plugs the bottom plate hole part 11, at this time, the gas is discharged from the circumferential gas leakage gap 33 and the gas leakage groove 31 of the support plate 3.

[0046] The area of the gas leakage gap 33 and the gas leakage groove 31 is large, the gas leakage speed is fast, and it is not easy to block, which greatly improves the gas leakage reliability of the valve body; because the horizontal direction gas leakage area is very large, the height direction size can be further reduced, which is beneficial to the light and thin design of the 3C industry; and because the valve piece 2 has small movement displacement and small deformation, the valve piece 2 is not easy to lose service life due to excessive deformation, and has high reliability; at the same time, the gas leakage passage area is large, and it is not easy to produce airflow howling sound, which can reduce the noise.

[0047] As shown in Figure 9 in order to realize the opposite gas flow, that is, to further reduce the gas flow, the bottom plate hole part 11 can be a single hole opened in the center of the bottom plate 1 or a hole group composed of multiple holes opened in the center of the bottom plate 1, and the structure does not exist the plugging plate 12. When the gas flows reversely from the cover plate hole part 41, because the valve piece 2 is attached to the bottom plate 1 in the normal state, and the gas leakage gap 33 and the gas leakage groove 31 have large area and fast flow speed, therefore, even if the valve piece 2 flow-through area 23 valve 22 is opposite to the bottom plate hole part 11 of the bottom plate 1, it will not cause a large amount of gas backflow, and the valve can still work normally.

[0048] As shown in Figure 10 in order to avoid the gas backflow caused by the bottom plate hole part 11 arranged in the center of the bottom plate 1, the bottom plate hole part 11 can be arranged in a ring shape, and the middle area of the ring-shaped bottom plate hole part 11 forms a plugging plate 12 opposite to the flow-through area 23. The bottom plate hole part 11 is composed of a plurality of gas inlet holes, and the plurality of gas inlet holes are circumferentially distributed with the center of the valve piece 2 as the center. Preferably, the gas inlet hole is a fan-shaped hole or a curved waist-shaped hole or a curved square hole. The outer diameter of the valve piece 2 is 20% to 90% of the single side length of the bottom plate 1, and the thickness of the valve piece 2 is 0.002 to 2 mm, which is determined according to the material characteristics. Through the cooperation of the curved arc-shaped hole and the circular valve piece 2, effective plugging can be realized, and the plugging effect is good.

[0049] As shown in Figure 11As shown, in order to optimize the sealing effect of the bottom plate hole part 11 on the bottom plate 1 when deflated, the sealing plate 12 is provided with a boss 13 on the side facing the valve plate 2, the diameter of the boss 13 is smaller than the inner diameter of the annular bottom plate hole part 11, of course the boss 13 can also be provided on the valve plate 2.

[0050] As shown in the drawings, the valve plate 2 is provided with a sealing plate 12, the sealing plate 12 is provided with a sealing plate hole part 11, the sealing plate hole part 11 is coaxial with the bottom plate hole part 11, of course the sealing plate hole part 11 can also be provided on the bottom plate 1. Figure 12 As shown, in order to optimize the sealing effect of the deflation gap 33 when the gas is flowing out, the cover plate 4 is provided with a convex ring 42 on the side facing the valve plate 2, the convex ring 42 is provided on the periphery of the cover plate hole part 41 and is concentric with the cover plate hole part 41, of course the convex ring 42 can also be provided on the valve plate 2.

[0051] As shown in the drawings, the valve plate 2 is provided with a sealing plate 12, the sealing plate 12 is provided with a sealing plate hole part 11, the sealing plate hole part 11 is coaxial with the bottom plate hole part 11, of course the sealing plate hole part 11 can also be provided on the bottom plate 1. Figure 13 As shown, a fluid pump, comprising a pump 5 and a valve, the pump 5 and the valve share a bottom plate 1, the pump 5 has a pump chamber 51 communicating with the bottom plate hole part 11. By energizing and de-energizing the pump 5, the gas flow is controlled.

[0052] The above description is only illustrative and not restrictive, and those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope of the appended claims, but all will fall within the protection scope of the utility model.

Claims

1. A valve comprising a bottom plate (1) having a bottom plate hole portion (11), a cover plate (4) having a cover plate hole portion (41), a valve sheet (2), and a support plate (3) having at least one air release groove (31), the bottom plate (1), the support plate (3) and the cover plate (4) are sequentially stacked, a middle part of the support plate (3) is hollowed out, so that a valve chamber (32) is formed between the bottom plate (1) and the cover plate (4), the valve sheet (2) is arranged in the valve chamber (32) and has a thickness smaller than a height of the valve chamber (32), so that an air release gap (33) is formed, the air release groove (31) is in communication with the valve chamber (32) and the air release gap (33) and is arranged at an outer peripheral part of the support plate (3), characterized in that at least one unclosed division line (21) is arranged on the valve sheet (2), the valve sheet (2) can be elastically deformed under the action of gas blowing, so that a gas port is formed in a region where the division line (21) is located, and the bottom plate hole portion (11), the cover plate hole portion (41) and the gas port are opposite to each other.

2. A valve according to claim 1, characterised in that: a movable valve (22) is formed in the region where the division line (21) is located, the valve (22) is connected with the valve sheet (2) and forms a connection line, the division line (21) and the connection line are connected end to end to form a closed line, and the length of the division line (21) is not less than the length of the connection line.

3. A valve according to claim 2, wherein: the valve sheet (2) is circular, the valve sheet (2) sequentially comprises a flow-through area (23), a plugging area (24) and a bonding area (25) from the center of the circle to the outside, the valve sheet (2) is fixed on the bottom plate (1) through the bonding area (25), the plugging area (24) is used for circumferentially plugging the air release gap (33) of the support plate (3), and the valve (22) is arranged in the flow-through area (23).

4. A valve according to claim 1, characterised in that: the bottom plate hole portion (11) is a single hole arranged at the center of the bottom plate (1) or a hole group composed of multiple holes arranged at the center of the bottom plate (1).

5. A valve according to claim 3, wherein: the bottom plate hole portion (11) is annular, and a middle area of the annular bottom plate hole portion (11) forms a plugging plate (12) opposite to the flow-through area (23).

6. A valve according to claim 5, wherein: the bottom plate hole portion (11) is composed of a plurality of air inlet holes, and the plurality of air inlet holes are circumferentially and uniformly distributed with the center of the valve sheet (2) as the center. the air inlet hole is a sector hole or a curved waist hole or a curved square hole.

7. A valve according to claim 3, wherein: the valve sheet (2) is fixed on the bottom plate (1) at the periphery of the bottom plate hole portion (11) through the bonding area (25), so that the flow-through area (23) and the plugging area (24) of the valve sheet (2) are attached to the bottom plate (1); when gas flows into the bottom plate hole portion (11), the flow-through area (23) and the plugging area (24) of the valve sheet (2) attached to the bottom plate (1) are elastically deformed to the side of the cover plate (4) and attached to the periphery of the cover plate hole portion (41) under the extrusion of the gas, thereby plugging the air release gap (33), blocking the flow of the gas to the valve chamber (32), and further preventing the gas from flowing out of the air release groove (31); at the same time, the valve (22) of the flow-through area (23) is opened to form a gas port, the gas port is in communication with the cover plate hole portion (41), and at this time, the gas is discharged from the cover plate hole portion (41). When the gas flows reversely from the cover plate hole (41), the gas port is closed, under the push of the reversely flowing gas, the flow-through area (23) and the blocking area (24) of the valve piece (2) move towards the bottom plate (1), the valve piece (2) is pushed against the bottom plate (1) and blocks the bottom plate hole (11), the air leakage gap (33) is opened, at this time, the gas is discharged from the air leakage groove (31) through the air leakage gap (33) and the valve chamber (32), and the air leakage function is realized.

8. A valve according to claim 5, wherein: The side of the blocking plate (12) facing the valve piece (2) is provided with a boss (13), and the diameter of the boss (13) is smaller than the inner diameter of the annular bottom plate hole (11).

9. A valve according to claim 3, wherein: The side of the cover plate (4) facing the valve piece (2) is provided with a convex ring (42), and the convex ring (42) is arranged at the periphery of the cover plate hole (41).

10. A fluid pump characterized by: The valve comprises a pump (5) and the valve according to any one of claims 1-9, the pump (5) and the valve share the bottom plate (1), and the pump (5) has a pump chamber (51) in communication with the bottom plate hole (11).

Images