Gas washing valve

Abstract

The utility model discloses a gas washing valve which comprises a valve body assembly, a cover plate assembly and an elastic element. The valve body assembly is suitable for communicating with a low-pressure loop; the cover plate assembly is suitable for communicating with a high-pressure loop; the elastic element is arranged between the valve body assembly and the cover plate assembly and suitable for controlling connection or disconnection of the low-pressure loop. According to the gas washing valve provided by the utility model, the on-off control of gas flow can be realized by controlling the deformation of the elastic element, so that the gas can be effectively prevented from being polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, in particular to an air washing valve. Background Art

[0002] With the development of science and technology, the types of valves used to control gas flow are increasing. Currently, the most common valves used to control gas flow on the market are solenoid valves and diaphragm valves.

[0003] Both solenoid valves and diaphragm valves are valves used to control gas flow, but they differ in structure and working principle, so their advantages are also different. Solenoid valves can respond quickly to control signals and achieve rapid switching actions. They can be remotely controlled by electrical signals and are suitable for automation and remote control systems. Diaphragm valves can achieve leak-free operation because the valve's closing member (diaphragm) is isolated from the valve stem and actuator.

[0004] However, the grease used to lubricate the solenoid valve and diaphragm valve during operation, foreign matter and debris generated by the friction of the valve core or valve plate will contaminate the passing gas. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an air purge valve that can realize on-off control of gas flow by controlling the deformation of an elastic element, thereby effectively avoiding contamination of the passing gas by the gas path switch control element.

[0006] An air washing valve according to the utility model comprises: a valve body assembly, a cover plate assembly, and an elastic element;

[0007] The valve body assembly is suitable for communicating with a low-pressure circuit;

[0008] The cover plate assembly is adapted to be in communication with the high pressure circuit;

[0009] The elastic element is arranged between the valve body assembly and the cover plate assembly, and the elastic element is suitable for controlling the connection or disconnection of the low-pressure circuit.

[0010] The air purge valve provided by the utility model is connected by connecting the valve body assembly with the low-pressure circuit, and the cover plate assembly with the high-pressure circuit. With such an arrangement, the high-pressure gas in the high-pressure circuit and the low-pressure gas in the low-pressure circuit can be distributed on opposite sides of the elastic element, respectively, and the high-pressure gas and the low-pressure gas are independent of each other. The high-pressure gas can control the deformation of the elastic element, and the elastic element can isolate the low-pressure circuit after deformation, thereby blocking the flow of the low-pressure gas in the low-pressure circuit, and achieving the effect of closing the flow of the low-pressure gas. The effect of controlling the connection or disconnection of the low-pressure circuit is achieved through the deformation reaction of the elastic element to the high-pressure gas. In addition, the air purge valve provided by the utility model has a simple structure, low manufacturing cost, and long service life.

[0011] In some examples of the present invention, in an air purge valve provided by the present invention, the elastic element is made of any one of rubber, silicone or polyurethane.

[0012] In some examples of the utility model, the utility model proposes an air washing valve, the valve body assembly has a ventilation cavity and a accommodating cavity which are interconnected, the ventilation cavity is connected to a low-pressure circuit on the side away from the accommodating cavity, an elastic element is arranged in the accommodating cavity, and the elastic element is suitable for controlling the connection or disconnection of the ventilation cavity.

[0013] In some examples of the utility model, the utility model provides an air washing valve, wherein the cover plate assembly is arranged on a side of the accommodating cavity away from the ventilation cavity, and the cover plate assembly is suitable for sealing the elastic element in the accommodating cavity.

[0014] In some examples of the present invention, the present invention provides an air purge valve, the valve body assembly comprising:

[0015] The valve body, the vent cavity and the accommodating cavity are all arranged on one side of the valve body;

[0016] The joint assembly is arranged on the other side of the valve body, and the joint assembly is communicated with the ventilation cavity, and the joint assembly is suitable for communicating with the low-pressure circuit.

[0017] In some examples of the present invention, the present invention provides an air purge valve, the connector assembly comprising:

[0018] The first connector and the second connector are both connected to the valve body, one end of the first connector and the second connector are respectively connected to the ventilation cavity, and the other end of the first connector and the second connector are suitable for connecting to the low-pressure circuit.

[0019] In some examples of the present invention, the present invention provides an air purge valve, the cover plate assembly comprising:

[0020] A cover plate, one side of the cover plate is arranged on a side of the accommodating cavity away from the ventilation cavity;

[0021] The third joint is connected to the other side of the cover plate, and the third joint is communicated with the accommodating cavity, and the third joint is selectively communicated with the high-pressure circuit.

[0022] In some examples of the present invention, an air washing valve provided by the present invention further includes a first vent hole, and the first connector and the second connector are respectively connected to the ventilation cavity through the first vent hole.

[0023] In some examples of the present invention, an air washing valve provided by the present invention further includes a second vent hole, and the third joint is connected to the accommodating cavity through the second vent hole.

[0024] In some examples of the present invention, an air purge valve provided by the present invention further includes a connecting piece, and the cover plate assembly is fixedly connected to the valve body assembly through the connecting piece.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of an air purge valve provided according to an embodiment of the utility model;

[0028] Figure 2 It is a cross-sectional schematic diagram of an air purge valve provided according to an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 10-Air purge valve;

[0031] 100-valve body assembly;

[0032] 110-ventilation cavity;

[0033] 120-accommodating chamber;

[0034] 130-valve body;

[0035] 140-connector assembly; 141-first connector; 142-second connector;

[0036] 150- low pressure air inlet;

[0037] 160- low pressure outlet;

[0038] 200-cover plate assembly;

[0039] 210-cover plate;

[0040] 220-third connector;

[0041] 230-high pressure air inlet;

[0042] 300-elastic element;

[0043] 400 - first vent hole;

[0044] 500 - second vent hole;

[0045] 600-Connectors. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] With the development of science and technology, the types of valves used to control gas flow are increasing. Currently, the most common valves used to control gas flow on the market are solenoid valves and diaphragm valves.

[0051] Both solenoid valves and diaphragm valves are valves used to control gas flow, but they differ in structure and working principle, so their advantages are also different. For example, solenoid valves can respond quickly to control signals and achieve rapid switching actions. They can be remotely controlled by electrical signals and are suitable for automation and remote control systems. Diaphragm valves can achieve leak-free operation because the valve's closing member (diaphragm) is isolated from the valve stem and actuator.

[0052] However, in the prior art, solenoid valves and diaphragm valves have certain technical defects. The performance of the solenoid valve may be affected by temperature and needs to be specially designed to adapt to high or low temperature environments. In addition, when the solenoid valve is working, there is a risk of leakage of the lubricating oil added inside, which in turn causes the gas flowing through the solenoid valve to be contaminated by the lubricating oil. In addition, foreign matter and debris generated by the friction of the valve core movement will also cause the passing gas to be contaminated. The diaphragm of the diaphragm valve is a wearing part. When it is working, the operating rod needs to directly apply force to the diaphragm. The diaphragm will be severely worn and produce debris due to uneven force for a long time. As a result, the gas flowing through the diaphragm valve is contaminated by debris, which is not conducive to sustainable development.

[0053] Based on this, the utility model provides an air purge valve 10. Compared with the traditional valve, the on-off control of the gas flow is realized by controlling the deformation of the elastic element 300, thereby effectively preventing the gas from being contaminated by oil or debris, and ensuring that the gas flowing through the air purge valve 10 is clean and free of any pollution. In addition, the air purge valve 10 provided by the utility model has a simple structure, low manufacturing cost and long service life.

[0054] Figure 1 This is a schematic diagram of the structure of the air wash valve 10 provided by the utility model. Figure 2 It is a cross-sectional schematic diagram of an air purge valve 10 provided according to an embodiment of the utility model.

[0055] like Figure 1 and Figure 2 As shown, the utility model provides an air purge valve 10, including a valve body assembly 100, a cover plate assembly 200, and an elastic element 300; the valve body assembly 100 is suitable for being connected to a low-pressure circuit (not shown in the figure); the cover plate assembly 200 is suitable for being connected to a high-pressure circuit (not shown in the figure); the elastic element 300 is arranged between the valve body assembly 100 and the cover plate assembly 200, and the elastic element 300 is suitable for controlling the connection or disconnection of the low-pressure circuit.

[0056] Specifically, the valve body assembly 100 and the cover plate assembly 200 can both be rectangular parallelepiped structures or cylindrical structures, which are not specifically limited in the embodiments of the present invention, and the following embodiments are explained by taking the rectangular parallelepiped structure as an example. Correspondingly, the elastic element 300 disposed between the valve body assembly 100 and the cover plate assembly 200 can also be a rectangular parallelepiped structure or a cylindrical structure, which are not specifically limited in the embodiments of the present application.

[0057] One side of the cover plate assembly 200 can be fixedly connected to the valve body assembly 100 by means of screw connection, bolt connection or riveting. Such a setting can significantly improve the sealing performance of the air purge valve 10 and effectively prevent the leakage of gas entering the interior of the air purge valve 10, thereby greatly improving the overall stability and reliability of the air purge valve 10.

[0058] The low-pressure circuit can be understood as a channel provided inside the valve body assembly 100 for the circulation of low-pressure gas.

[0059] The high-pressure circuit can be understood as a channel for high-pressure gas to flow inside the cover plate assembly 200. If the high-pressure gas enters the high-pressure circuit, the elastic element 300 controls the low-pressure circuit to be disconnected under the action of the high-pressure gas. If the high-pressure gas does not enter the high-pressure circuit, there is no high-pressure gas force, and the elastic element 300 controls the low-pressure circuit to be connected.

[0060] With such a configuration, the high-pressure gas in the high-pressure circuit and the low-pressure gas in the low-pressure circuit can be distributed on opposite sides of the elastic element 300, respectively, and the high-pressure gas and the low-pressure gas are independent of each other. The high-pressure gas can control the deformation of the elastic element 300, and the elastic element 300 can cut off the low-pressure circuit after deformation, thereby blocking the flow of the low-pressure gas in the low-pressure circuit, and further achieving the effect of closing the gas flow. The elastic element 300 is deformed by the action of the high-pressure gas, thereby achieving the effect of controlling the connection or disconnection of the low-pressure circuit. The high-pressure gas can act evenly on the elastic element 300, thereby reducing the wear on the elastic element 300.

[0061] Please continue to participate Figure 1 and Figure 2 As shown, the structural material of the elastic element 300 can be a polymer elastomer, specifically any one of rubber, silicone, polyurethane or EPDM.

[0062] In a specific implementation, the elastic element 300 can be made of rubber. Such a configuration can improve the wear resistance of the elastic element 300 and significantly reduce the production cost of the elastic element 300.

[0063] The elastic element 300 can also be constructed of polyurethane, because polyurethane has very high wear resistance, which is usually many times higher than natural rubber and other synthetic rubbers, and can maintain high tensile strength and good elasticity over a wide range of hardness. At the same time, polyurethane has good resistance to non-polar solvents such as mineral oil, and can resist corrosion from a variety of chemicals.

[0064] The elastic element 300 can also be constructed of EPDM (ethylene propylene diene monomer rubber). Due to the saturated structure of its molecular chain, EPDM has excellent heat resistance, light resistance, oxygen resistance, and especially ozone resistance, and is easy to clean and maintain. It does not require special maintenance, and due to its durability and low maintenance cost, it has higher economic benefits in the long run.

[0065] It should be noted that in the embodiment of the utility model, the elastic element 300 can be constructed of silicone. Compared with rubber, polyurethane or EPDM, silicone has better high temperature resistance; and silicone products can be used in a temperature range of -40 to 230 degrees Celsius without being hardened or melted, and without producing toxic substances. Since the chemical properties of silicone are very stable, the service life of silicone products is usually longer than that of other materials. Silicone material is soft, has good flexibility, is not easy to deform, and feels comfortable. At the same time, the silicone material itself is non-toxic and tasteless, and has stable properties, so there is no need to worry about the production of toxic substances in the products made.

[0066] The valve body assembly 100 provided according to the embodiment of the utility model has a ventilation chamber 110 and a receiving chamber 120 which are interconnected. The side of the ventilation chamber 110 which is away from the receiving chamber 120 is connected to the low-pressure circuit. The elastic element 300 is arranged in the receiving chamber 120. The elastic element 300 is suitable for controlling the connection or disconnection of the ventilation chamber 110.

[0067] The ventilation cavity 110 can be a rectangular parallelepiped structure or a cylindrical structure, which is not specifically limited in the embodiments of the present invention. The following embodiments are explained by taking the rectangular parallelepiped structure as an example. Correspondingly, the accommodating cavity 120 can also be a rectangular parallelepiped structure or a cylindrical structure, which is not specifically limited in the embodiments of the present application.

[0068] Specifically, Figure 2 As shown, the low-pressure circuit may include a low-pressure gas outlet 160 and a low-pressure gas inlet 150, which may be respectively arranged on the valve body assembly 100 and both communicate with the ventilation cavity 110. A nozzle (not shown in the figure) may be connected to the low-pressure gas outlet 160, and a low-pressure cylinder (not shown in the figure) may be connected to the low-pressure gas inlet 150, and the low-pressure gas flowing out of the low-pressure cylinder flows into the ventilation cavity 110 through the low-pressure gas inlet 150, and then flows into the nozzle through the low-pressure outlet for user use.

[0069] Please continue to see Figure 2 As shown, the high-pressure circuit may include a high-pressure air inlet 230, which may be disposed on the cover plate assembly 200, and the high-pressure air inlet 230 may be communicated with the accommodating chamber 120, and the high-pressure air inlet 230 may also be communicated with a high-pressure cylinder (not shown in the figure). The high-pressure gas flowing out of the high-pressure cylinder may flow into the accommodating chamber 120 through the high-pressure air inlet 230.

[0070] With such arrangement, when no high-pressure gas enters the accommodating chamber 120, the elastic element 300 maintains its initial state. At this time, the nozzle, the low-pressure air inlet 150, the low-pressure air outlet 160, the low-pressure cylinder and the ventilation chamber 110 can form a low-pressure circuit. At this time, the low-pressure gas can enter from the low-pressure cylinder and exit from the nozzle.

[0071] When high-pressure gas enters the accommodating chamber 120 through the high-pressure cylinder, under the action of the high-pressure gas, the elastic element 300 is deformed and extends into the ventilation chamber 110. At this time, the ventilation chamber 110 is blocked by the elastic element 300, so that the ventilation chamber 110 can be disconnected, and the low-pressure circuit can be disconnected by controlling the elastic element 300.

[0072] Please continue to see Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the cover assembly 200 is disposed on a side of the accommodating cavity 120 away from the ventilation cavity 110 , and the cover assembly 200 is suitable for sealing the elastic element 300 in the accommodating cavity 120 .

[0073] Specifically, the cover plate 210 element can be a rectangular parallelepiped structure larger than the valve body assembly 100 and the elastic element 300, or a cylindrical structure, which is not specifically limited in the embodiments of the present invention, and the following embodiments are explained by taking the rectangular parallelepiped structure as an example. The cover plate assembly 200 is tightly fitted with the valve body assembly 100 and the elastic element 300 to form a sealed environment.

[0074] With such a configuration, when high-pressure gas enters the high-pressure air inlet 230, the high-pressure gas can push part of the elastic element 300 from the accommodating cavity 120 into the ventilation cavity 110. With such a configuration, by introducing high-pressure gas, the force points on the elastic element 300 can be distributed more evenly and no physical wear will occur, thereby reducing the risk of damage to the elastic element 300 and significantly saving the cost of use.

[0075] Please continue to see Figure 1 and Figure 2 As shown, according to another embodiment of the present invention, the valve body assembly 100 includes:

[0076] The valve body 130, the ventilation cavity 110 and the accommodating cavity 120 are all arranged on one side of the valve body 130; the joint assembly 140, the joint assembly 140 is arranged on the other side of the valve body 130, and the joint assembly 140 is connected with the ventilation cavity 110, and the joint assembly 140 is suitable for connecting with the low-pressure circuit.

[0077] Specifically, the vent cavity 110 and the accommodating cavity 120 in the valve body 130 are both arranged at the connection with the cover plate assembly 200, wherein the accommodating cavity 120 may be a cylindrical cavity or a rectangular cavity having a volume larger than the vent cavity 110. The joint assembly 140 is arranged on the other side of the valve body 130, and the joint assembly 140 is communicated with the vent cavity 110, and the joint assembly 140 is suitable for communicating with the low-pressure circuit. The accommodating cavity 120 may be a cylindrical cavity or a rectangular cavity having a volume larger than the vent cavity 110.

[0078] The low-pressure air inlet 150 and the low-pressure air outlet 160 may be respectively provided in the joint assembly 140 by means of integral molding.

[0079] With such arrangement, when the elastic element 300 in the accommodating cavity 120 is squeezed by the high-pressure gas, it enters the vent cavity 110 to close the vent cavity 110, thereby achieving the effect of disconnecting the low-pressure circuit.

[0080] Please continue to see Figure 1 and Figure 2 As shown, according to another embodiment of the present invention, the joint assembly 140 includes:

[0081] The first connector 141 and the second connector 142 are both connected to the valve body 130, one end of the first connector 141 and the second connector 142 are respectively connected to the ventilation cavity 110, and the other end of the first connector 141 and the second connector 142 are suitable for connecting to the low-pressure circuit.

[0082] Specifically, both ends of the first joint 141 and the second joint 142 are respectively fixedly connected to the valve body 130 and the vent cavity 110 by threaded connection or riveting with the valve body assembly 100. The low pressure air outlet 160 can be provided on the first joint 141, and the low pressure air inlet 150 can be provided on the second joint 142.

[0083] Such a configuration can significantly improve the sealing performance of the low-pressure circuit and effectively prevent the leakage of the low-pressure gas entering the ventilation cavity 110, thereby greatly improving the sealing performance of the air purge valve 10, and further improving the stability and reliability of the air purge valve 10.

[0084] Please continue to see Figure 1 and Figure 2 As shown, according to an optional embodiment of the present utility model, the cover plate assembly 200 includes:

[0085] A cover plate 210, one side of the cover plate 210 is arranged on the side of the accommodating chamber 120 away from the ventilation chamber 110; a third joint 220, the third joint 220 is connected to the other side of the cover plate 210, and the third joint 220 is communicated with the accommodating chamber 120, and the third joint 220 is selectively communicated with the high-pressure circuit.

[0086] Specifically, one end of the third joint 220 can be connected to the cover plate 210 , and the specific connection method can be threaded connection or clamping. The high-pressure air inlet 230 can be provided on the third joint 220 by an integral molding method, and the high-pressure air inlet 230 is communicated with the accommodating chamber 120 .

[0087] Such a configuration can significantly improve the sealing performance of the high-pressure circuit, effectively prevent the leakage of the high-pressure gas introduced into the accommodating chamber 120, and thus greatly improve the overall stability and reliability of the high-pressure circuit.

[0088] Please continue to see Figure 1 and Figure 2 As shown, according to a further embodiment of the present utility model, an air washing valve 10 further includes a first vent hole 400 , and the first connector 141 and the second connector 142 are respectively connected to the ventilation cavity 110 through the first vent hole 400 .

[0089] Specifically, the first vent hole 400 can be provided on the valve body 130 by an integral molding method, the number of the first vent holes 400 can be two, and the two first vent holes 400 can be spaced apart and arranged in parallel, wherein the opposite ends of one of the first vent holes 400 can be respectively connected to the low-pressure gas outlet 160 and the ventilation cavity 110, and the opposite ends of the other first vent hole 400 can be respectively connected to the low-pressure gas inlet 150 and the ventilation cavity 110 to form a closed ventilation passage. The first vent hole 400 is a ventilation duct having a diameter smaller than that of the first joint 141 and the second joint 142. It is arranged in this way so that the low-pressure gas can flow between the joint assembly 140 and the ventilation cavity 110.

[0090] Please continue to see Figure 1 and Figure 2 As shown, in an optional manner of the present invention, the air purge valve 10 further includes a second vent hole 500 , and the third joint 220 is connected to the accommodating chamber 120 via the second vent hole 500 .

[0091] Specifically, the second vent hole 500 can be provided on the cover plate 210 in an integrally formed manner, and the third joint 220 is connected to the accommodating cavity 120 through the second vent hole 500 to form a closed ventilation channel. The second vent hole 500 is a ventilation duct having a diameter smaller than that of the third joint 220, and is provided in this manner so that high-pressure gas can flow between the joint assembly 140 and the ventilation cavity 110.

[0092] Please continue to see Figure 1 and Figure 2 As shown, in some examples of the present invention, the air purge valve 10 further includes a connecting member 600 , and the cover plate assembly 200 is fixedly connected to the valve body assembly 100 via the connecting member 600 .

[0093] Specifically, the connecting member 600 can be a screw, a bolt, or a rivet, which is not limited in the embodiment of the utility model, and is configured so that the valve body assembly 100 can be fixedly connected to the cover plate assembly 200 by threaded connection, bolt connection, or riveting. In this way, when the elastic element 300 needs to be replaced, such a fixed connecting member 600 is easy to install and disassemble, and can be reused, which improves work efficiency and reduces costs.

[0094] Other components of the air purge valve 10 according to the embodiment of the utility model, such as the nozzle (not shown in the figure), the low-pressure cylinder (not shown in the figure) and the high-pressure cylinder (not shown in the figure), etc. and their operation are well known to ordinary technicians in the field and will not be described in detail here.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air purge valve, characterized in that: include: A valve body assembly, wherein the valve body assembly is adapted to communicate with a low-pressure circuit; a cover plate assembly, the cover plate assembly being adapted to communicate with the high pressure circuit; An elastic element is provided between the valve body assembly and the cover plate assembly, and the elastic element is suitable for controlling the connection or disconnection of the low-pressure circuit.

2. The air purge valve according to claim 1, characterized in that: The elastic element is made of any one of rubber, silicone or polyurethane.

3. The air purge valve according to claim 1, characterized in that: The valve body assembly comprises a ventilation cavity and a receiving cavity which are interconnected. The side of the ventilation cavity which is away from the receiving cavity is connected to the low-pressure circuit. The elastic element is arranged in the receiving cavity. The elastic element is suitable for controlling the connection or disconnection of the ventilation cavity.

4. The air purge valve according to claim 3, characterized in that: The cover plate assembly is arranged on a side of the accommodating cavity away from the ventilation cavity, and the cover plate assembly is suitable for sealing the elastic element in the accommodating cavity.

5. The air purge valve according to claim 3, characterized in that: The valve body assembly comprises: A valve body, wherein the vent cavity and the accommodating cavity are both arranged on one side of the valve body; A joint assembly is arranged on the other side of the valve body, and the joint assembly is communicated with the ventilation cavity, and the joint assembly is suitable for communicating with the low-pressure circuit.

6. The air purge valve according to claim 5, characterized in that: The joint assembly comprises: A first connector and a second connector, wherein the first connector and the second connector are both connected to the valve body, one end of the first connector and the second connector are respectively connected to the ventilation cavity, and the other end of the first connector and the second connector are suitable for connecting to the low-pressure circuit.

7. The air purge valve according to claim 6, characterized in that: The cover plate assembly comprises: A cover plate, one side of which is arranged on a side of the accommodating cavity away from the vent cavity; A third joint, the third joint is connected to the other side of the cover plate, and the third joint is communicated with the accommodating cavity, and the third joint is selectively communicated with the high-pressure circuit.

8. The air purge valve according to claim 7, characterized in that: Also includes: A first vent hole, the first joint and the second joint are respectively connected to the vent cavity through the first vent hole.

9. The air purge valve according to claim 7, characterized in that: Also includes: A second vent hole, the third joint is connected to the accommodating cavity through the second vent hole.

10. The air purge valve according to any one of claims 1 to 9, characterized in that: Also includes: A connecting piece, wherein the cover plate assembly is fixedly connected to the valve body assembly via the connecting piece.

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