Quick air release valve

Abstract

The utility model relates to the technical field of electrically-driven pumps, in particular to a quick air release valve which comprises a bottom plate, a cover plate, a valve plate and a supporting plate, at least one air release channel is arranged on the supporting plate, the bottom plate, the supporting plate and the cover plate are sequentially stacked, the middle of the supporting plate is hollowed out, and a valve chamber capable of containing the valve plate is formed between the bottom plate and the cover plate. The thickness of the valve plate is smaller than the height of the valve chamber, an air leakage gap is formed, the air leakage channel is communicated with the air leakage gap and the valve chamber and arranged on the periphery of the supporting plate, the valve plate hole part is composed of a plurality of small holes, and the bottom plate hole part, the cover plate hole part and the small holes are oppositely arranged. The quick air release valve introduces a lateral air release concept, replaces traditional single-hole air release with an air release space, is high in air release speed, reduces the risk of blockage failure, and improves the product reliability; and the hole part of the valve plate is arranged into a hole group consisting of a plurality of small holes, so that the gas pressure can be effectively dispersed, the loss of the valve plate is reduced, and the service life of the valve plate is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electrically driven pump technology, and in particular to a quick-release valve. Background Technology

[0002] The advent of smart wearable devices such as wrist and arm blood pressure monitors has greatly facilitated people's lives, thus gaining market favor. As a result, the miniature air pumps and vent valves, which are core components of these devices, have also received widespread attention within the industry. Improving the performance of miniature air pumps and vent valves has become a key factor in enhancing product performance. To achieve structural miniaturization, vent valves used in smart wearable devices often employ a diaphragm structure. The diaphragm deforms due to fluid flow, dividing the internal space of the housing into an inlet side and an outlet side.

[0003] A search revealed patent CN117280149A, which discloses a valve, a fluid control device, a pressurizing device, and a blood pressure monitor. It employs a connecting path to link the first and second wall-side spaces, suppressing rapid changes in the cross-sectional area and velocity of the first flow path to inhibit membrane vibration. However, in practical use, it was found that when the pump stops and reverses its flow, the gas can only exit through orifice 790. Due to the limited flow area, the gas release speed is slow. For wrist and arm blood pressure monitors, and in the massage industry, the excessively long pressure release time results in a poor user experience. Furthermore, the single-orifice pressure release structure greatly increases the risk of blockage if impurities enter, leading to low reliability. When the pump is powered on and releasing gas in the forward direction, the gas pushes open valve plate 80 and needs to make two turns before flowing out through orifice 800. This process increases friction and local resistance, causing a decrease in the pump's output gas pressure and flow rate. Utility Model Content

[0004] To address the problems of slow venting speed and easy clogging caused by the limited flow area in existing single-hole venting systems, this invention provides a fast venting valve. It introduces the concept of lateral venting, utilizing the venting space to replace the traditional single-hole venting, resulting in faster venting speed, reduced risk of clogging and failure, and improved product reliability. Furthermore, the valve plate orifice is designed as a group of small holes, reducing gas backflow during venting. This multi-hole design also effectively disperses gas pressure, reducing valve plate wear and extending valve plate lifespan.

[0005] This utility model provides a quick-release valve, including a base plate, a cover plate, a valve plate, and a support plate. The base plate has a base plate hole, the cover plate has a cover plate hole, the valve plate has a valve plate hole, and the support plate has at least one release channel. The base plate, support plate, and cover plate are stacked sequentially. The center of the support plate is hollowed out, forming a valve chamber between the base plate and cover plate to accommodate the valve plate. The thickness of the valve plate is less than the height of the valve chamber, forming a release gap. The release channel communicates with the release gap and the valve chamber and is located on the outer periphery of the support plate. The valve plate hole consists of several small holes, with the base plate hole, cover plate hole, and several small holes facing each other. Replacing a single large hole with several small holes achieves flow diversion, which not only reduces the pressure on a single hole but also reduces gas backflow, ensuring that gas can be quickly discharged from the circumferential release channel.

[0006] Furthermore, the diameter of each small orifice is 0.1~3mm. This disperses gas pressure without affecting gas flow, thereby reducing valve plate wear.

[0007] Furthermore, the bottom plate has an annular hole, and the middle area of ​​the bottom plate hole forms a sealing plate opposite to the valve plate hole. During venting, the valve plate is pushed onto the bottom plate by the reverse airflow. At this time, the valve plate hole is tightly attached to the valve sealing plate, thus sealing the valve plate hole.

[0008] Furthermore, the valve plate is circular, and its diameter is larger than the outer diameter of the hole in the annular base plate. This facilitates effective sealing of the hole in the base plate during venting.

[0009] 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 the circumferential venting gaps and venting channels to prevent gas leakage.

[0010] 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.

[0011] Furthermore, the valve plate includes a flow area, a blocking area, and an adhesive area from the center outwards. The valve plate is fixed to the base plate through the adhesive area. The blocking area is used to circumferentially block the venting gaps and venting channels of the support plate. Several small holes are set in the flow area.

[0012] Furthermore, several small holes are arranged in an orderly manner in the flow area of ​​the valve plate in a rectangular or ring array.

[0013] Furthermore, a boss is provided on the side of the sealing plate facing the valve plate, and the diameter of the boss is smaller than the inner diameter of the hole in the annular base plate. This can optimize the sealing effect of the hole in the base plate during venting. Of course, the boss can also be formed on the valve plate.

[0014] Furthermore, a raised ring is provided on the side of the cover plate facing the valve plate, and the raised ring is located around the periphery of the hole in the cover plate. This can optimize the sealing effect of the venting channel when air is discharged in the forward direction. Of course, the raised ring can also be formed on the valve plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention provides a quick-release valve. By setting a support plate to support the base plate and cover plate, it introduces the concept of a lateral venting space. This venting space replaces the traditional single-hole venting, resulting in a large venting area and fast venting speed. This effectively reduces the risk of blockage and failure, thereby improving product reliability. By accurately calculating the diameter and array pattern of the orifices, gas pressure and flow can be dispersed, and gas backflow during the venting process can be reduced, further optimizing venting performance and thus improving the overall performance of the equipment and the user experience. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the valve structure;

[0019] Figure 2 This is a cross-sectional view of the valve in a static state;

[0020] Figure 3 This is a cross-sectional view of the valve when the pump is energized (the arrows indicate the direction of gas flow).

[0021] Figure 4 This is a cross-sectional view of the valve when the pump is de-energized (the arrows indicate the direction of gas flow).

[0022] Figure 5 This is a schematic diagram of the shape of the hole in the base plate;

[0023] Figure 6 This is a schematic diagram showing the distribution of each zone of the valve plate;

[0024] Figure 7 This is a schematic diagram showing the boss on the base plate;

[0025] Figure 8 This is a schematic diagram showing the protruding ring on the cover plate;

[0026] In the figure: 1. Base plate, 11. Bottom plate hole, 12. Sealing plate, 13. Boss, 2. Valve plate, 21. Valve plate hole, 22. Flow area, 23. Sealing area, 24. Adhesion area, 3. Support plate, 31. Venting channel, 32. Valve chamber, 33. Venting gap, 4. Cover plate, 41. Cover plate hole, 42. Protruding ring. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0028] To accelerate the venting process and improve user experience, a rapid venting valve is designed, such as... Figure 1 and 2 As shown, the device includes a base plate 1, a cover plate 4, a valve plate 2, and a support plate 3. The base plate 1 has a base plate hole 11, the cover plate 4 has a cover plate hole 41, the valve plate 2 has a valve plate hole 21, and the support plate 3 has at least one venting channel 31. The base plate 1, support plate 3, and cover plate 4 are stacked sequentially. The center of the support plate 3 is hollowed out, forming a valve chamber 32 between the base plate 1 and the cover plate 4 to accommodate the valve plate 2. The thickness of the valve plate 2 is less than the height of the valve chamber 32, forming a venting gap 33. The venting channel 31 communicates with the venting gap 33 and the valve chamber 32 and is located on the outer periphery of the support plate 3. The valve plate hole 21 consists of several small holes, with the base plate hole 11, the cover plate hole 41, and the several small holes facing each other. Changing the traditional single-hole design of the valve plate 2 to several small holes can disperse gas pressure and flow, reduce damage to the valve plate 2, and extend its service life.

[0029] like Figure 3 and 4As shown, a typical fluid pump includes a pump and a vent valve. Both the pump and vent valve share a base plate 1. The pump has a pump chamber communicating with the hole 11 in the base plate. Gas flow is controlled by energizing and de-energizing the pump. When the pump is energized, gas enters the hole 11 in the base plate from the pump chamber outlet, pushing the valve plate 2 to adhere to the plane around the hole 41 in the cover plate, closing the vent gap 33 and achieving lateral sealing. Compared to traditional sealing holes, this solution achieves lateral sealing of the entire vent height space, i.e., the gap between the base plate 1 and the cover plate 4. At this time, gas cannot flow to the external space from the vent channel 31 of the support plate 3, but can only flow out from the hole 41 in the cover plate 4. When the pump is de-energized, venting occurs, and gas flows in the reverse direction from the hole 41 in the cover plate. The traditional single large-sized valve hole setting causes some gas to flow between the valve plate 2 and the base plate 1 through the valve plate hole 21, causing the valve plate 2 to bulge towards the cover plate 4, resulting in incomplete contact between the valve plate 2 and the base plate 1. This design prevents the valve plate 2 from blocking the bottom plate hole 11. Gas that should be discharged from the circumferential venting channel 31 of the support plate 3 flows back to the pump chamber from the bottom plate hole 11, thus affecting the venting effect. However, this design changes the single large-sized valve hole into several small holes, which can disperse the pressure and flow through the valve plate hole 21, so that the valve plate 2 is evenly pressurized, reducing damage. When venting, the reverse-flowing gas can push the valve plate 2 against the bottom plate 1. Very little or no gas flows into the space between the valve plate 2 and the bottom plate 1 through the valve plate hole 26, so that the valve plate 2 and the bottom plate 1 can be completely attached and the venting gap 33 can 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 venting effect.

[0030] Preferably, the diameter of a single orifice is 0.1~3mm. This disperses gas pressure without affecting gas flow, thereby reducing wear on the valve plate 2.

[0031] like Figure 5 As shown, the bottom plate hole 11 is annular, and a sealing plate 12 is formed in the middle region of the bottom plate hole 11, which is opposite to the valve plate hole 21. The size of the sealing plate 12 is 100% to 800% of the valve plate hole 21. If the outer diameter of the bottom plate hole 11 is dimensionless and set to 1, then the diameter of the cover plate hole 41 is set to 10% to 90% of the outer diameter of the bottom plate hole 11.

[0032] The valve plate 2 is circular, and its diameter is larger than the outer diameter of the annular base plate hole 11. The area of ​​the opposing region is determined by the structure and size of the outermost edge of the base plate hole 11 and the cover plate hole 41. In principle, the larger the opposing region, the larger the sealing area, the greater the force generated by the airflow on the valve plate 2, and the better the sealing effect. The cover plate hole 41 needs to exceed the flow design requirements while ensuring that the opposing area meets the reliability requirements. Preferably, the diameter of the cover plate hole 41 is set to 10% to 90% of the outer edge size of the base plate hole 11.

[0033] The base plate orifice 11 consists of several air inlets, which are evenly distributed circumferentially around the center of the valve plate 2. The air inlets are fan-shaped, curved oblong, or curved square. The outer diameter of the valve plate 2 is set to 20%–90% of the side length of one side of the base plate 1, and the thickness of the valve plate 2 is 0.002–2 mm, depending on the material properties. Effective sealing can be achieved through the cooperation of the curved arc-shaped holes and the circular valve plate 2, resulting in a good sealing effect.

[0034] like Figure 6 As shown, specifically, the valve plate 2 includes a flow area 22, a sealing area 23, and an adhesive area 24 from the center outwards. The valve plate 2 is fixed to the base plate 1 through the adhesive area 24. The sealing area 23 is used to circumferentially seal the vent gap 33 and vent channel 31 of the support plate 3. Several small holes are arranged in the flow area 22. In order to ensure that the valve plate 2 is subjected to uniform force, the several small holes are arranged in an orderly manner in a rectangular array or a ring array in the flow area 22 of the valve plate 2.

[0035] like Figure 7 As shown, in order to optimize the sealing effect of the valve plate hole 21 during venting, 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 hole 11 of the annular bottom plate. Of course, the boss 13 can also be formed on the valve plate 2.

[0036] like Figure 8 As shown, in order to optimize the sealing effect of the vent gap 33 when the air is vented in the forward direction, a protruding ring 42 is provided on the side of the cover plate 4 facing the valve plate 2. The protruding ring 42 is located around the hole portion 41 of the cover plate. Of course, the protruding ring 42 can also be formed on the valve plate 2.

[0037] The above description is illustrative only and not restrictive of this utility model. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all such modifications, variations or equivalents will fall within the protection scope of this utility model.

Claims

1. A quick-release valve, comprising a base plate (1), a cover plate (4), a valve plate (2), and a support plate (3), wherein the base plate (1) is provided with a base plate hole (11), the cover plate (4) is provided with a cover plate hole (41), the valve plate (2) is provided with a valve plate hole (21), and the support plate (3) is provided with at least one venting channel (31). The base plate (1), the support plate (3), and the cover plate (4) are stacked sequentially. The middle part of the support plate (3) is hollowed out, so that a valve chamber (32) for accommodating the valve plate (2) is formed between the base plate (1) and the cover plate (4). The thickness of the valve plate (2) is less than the height of the valve chamber (32), forming a venting gap (33). The venting channel (31) communicates with the venting gap (33) and the valve chamber (32) and is provided on the outer periphery of the support plate (3). Its features are: The valve plate hole (21) is composed of several small holes, and the bottom plate hole (11), the cover plate hole (41) and several small holes are opposite each other.

2. The quick-release valve according to claim 1, characterized in that: The diameter of a single hole is 0.1~3mm.

3. The quick-release valve according to claim 1, characterized in that: The bottom plate hole (11) is annular, and a sealing plate (12) is formed in the middle area of ​​the bottom plate hole (11) opposite to the valve plate hole (21).

4. A quick-release valve according to claim 3, characterized in that: The valve plate (2) is circular, and the diameter of the valve plate (2) is larger than the outer diameter of the hole (11) in the annular bottom plate.

5. A quick-release valve according to claim 4, characterized in that: The bottom plate hole (11) is composed of several air inlets, which are evenly distributed circumferentially around the center of the valve plate (2).

6. A quick-release valve according to claim 5, characterized in that: The air inlet is a fan-shaped hole, a curved waist-shaped hole, or a curved square hole.

7. A quick-release valve according to claim 4, characterized in that: The valve plate (2) includes a flow area (22), a blocking area (23) and an adhesive area (24) from the center outwards. The valve plate (2) is fixed to the base plate (1) through the adhesive area (24). The blocking area (23) is used to circumferentially block the vent gap (33) and vent channel (31) of the support plate (3). Several small holes are set in the flow area (22).

8. A quick-release valve according to claim 7, characterized in that: Several small holes are arranged in a rectangular or ring array in an orderly manner in the flow area (22) of the valve plate (2).

9. A quick-release valve according to claim 3, characterized in that: The sealing plate (12) has a boss (13) on the side facing the valve plate (2), and the diameter of the boss (13) is smaller than the inner diameter of the hole (11) in the annular bottom plate.

10. A quick-release valve according to claim 1, characterized in that: The cover plate (4) is provided with a protruding ring (42) on the side facing the valve plate (2), and the protruding ring (42) is provided around the hole (41) of the cover plate.

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