One-way valve

Abstract

The utility model relates to the technical field of one-way valves, in particular to a one-way valve. The one-way valve comprises a valve body and a valve seat assembly, the valve seat assembly comprises a valve seat, a magnet, a valve seat valve port and an annular clamping groove, the annular clamping groove is provided with two side walls, and a receding groove is formed in one side wall. The end of the magnet can be installed in the annular clamping groove through the receding groove, and the magnet can rotate by a preset angle relative to the valve seat in the circumferential direction of the valve seat in the annular clamping groove, so that the two side walls of the annular clamping groove form axial stopping on the magnet. After the magnet is installed in the annular clamping groove, the receding groove forms a stopping part, the magnet and the stopping part form stopping when the magnet rotates in the annular clamping groove in the circumferential direction, so that the end of the magnet is limited to rotate into the receding groove, and the magnet is prevented from being disengaged from the valve seat when rotating to the position of the receding groove. According to the one-way valve provided by the invention, the problem that an existing magnet falls off under the impact of a refrigerant during interference installation is solved.

Description

Technical Field

[0001] The present application relates to the technical field of one-way valves, and in particular to a one-way valve. Background Art

[0002] Diaphragm-type one-way valves are widely used in air-conditioning systems. They usually include a valve body, a valve seat, a magnet, and a diaphragm. The valve seat is installed in the valve body, and the valve seat is provided with a valve port for the circulation of the refrigerant. The magnet is in the shape of a long strip and installed in the valve seat, and the magnet can attract the diaphragm so that the diaphragm cover is arranged on the valve port. When the refrigerant flows in the forward direction, the refrigerant can overcome the magnetic force to break open the diaphragm and open the valve port. When the refrigerant flows in the reverse direction, the diaphragm will block the valve port under the magnetic force and the refrigerant pressure, thereby cutting off the valve port. That is, the diaphragm-type one-way valve realizes the one-way circulation of the refrigerant by means of the cooperation between the magnet and the diaphragm.

[0003] In the related art, the magnet is often installed and fixed by interference fit with the inner wall of the installation space on the valve seat. However, during use, the refrigerant flowing through the valve port will impact the magnet. Under the long-term impact, the magnet may become loose, causing the magnet to fall off the valve seat, thereby causing product failure. Utility Model Content

[0004] Based on this, it is necessary to provide a one-way valve to solve the problem that the existing magnet will fall off due to interference installation under the impact of refrigerant.

[0005] The present application provides a one-way valve, which includes a valve body and a valve seat assembly installed in the valve body, the valve seat assembly includes a valve seat and a magnet, the valve seat is provided with a valve port axially penetrating the valve seat and an annular groove connected to the valve port, the annular groove has two side walls distributed along the axial direction of the valve seat, and one of the side walls is provided with an avoidance groove penetrating the valve seat along the axial direction of the valve seat; the end of the magnet can be installed in the annular groove through the avoidance groove, and the magnet can rotate relative to the valve seat in the annular groove along the circumference of the valve seat by a preset angle, so that the two side walls of the annular groove form an axial stop for the magnet; after the magnet is installed in the annular groove, the avoidance groove forms a stop portion, and when the magnet rotates circumferentially in the annular groove, it forms a stop with the stop portion to limit the end of the magnet from rotating into the avoidance groove, so as to prevent the magnet from rotating to the avoidance groove position and escaping from the valve seat.

[0006] In one of the embodiments, the side of the opening where the avoidance groove communicates with the valve port is defined as a stop point, wherein each of the stop points can deform toward the inside of the annular groove in response to an external force to form the stop portion.

[0007] In one embodiment, the number of the avoidance grooves is two, and the two avoidance grooves are arranged opposite to each other along the radial direction of the valve seat; wherein any two of the stop points adjacent to each other along the circumference of the valve seat form the stop portion, or all of the stop points form the stop portion.

[0008] In one of the embodiments, a limiting groove is further provided on the side wall of the annular groove, and the limiting groove and the avoidance groove are arranged at intervals along the circumference of the valve seat, and the side of the opening where the limiting groove is connected to the valve port is defined as a limiting point, and each of the limiting points can respond to external force to produce deformation toward the inside of the annular groove to form a limiting portion; wherein the limiting portion can stop the magnet along the circumference of the valve seat to prevent the end of the magnet from rotating along the circumference of the valve seat.

[0009] In one embodiment, the shortest distance between the limiting portion and the stopping portion is equal to the width of the magnet.

[0010] In one embodiment, the number of the limiting grooves is two, and the two limiting grooves are arranged opposite to each other along the radial direction of the valve seat.

[0011] In one embodiment, the stop portion is a riveted structure; and / or the limiting portion is a riveted structure.

[0012] In one of the embodiments, the valve seat assembly also includes a diaphragm and a limit bracket, one end of the limit bracket is connected to the valve seat, and the other end forms a limit surface; the diaphragm is movably installed in the limit bracket, and the diaphragm and the magnet are magnetically matched, and can be sealed at the valve port under the adsorption action of the magnet; when the diaphragm moves in a direction away from the valve seat under the action of external force, the diaphragm can stop at the limit surface.

[0013] In one embodiment, the valve seat assembly further includes a diaphragm, the inner wall of the valve body protrudes toward the direction close to the axis to form a protrusion, the diaphragm is arranged between the valve seat and the protrusion, and when the diaphragm moves in a direction away from the valve seat, the diaphragm can stop at the protrusion.

[0014] In one embodiment, a flow hole is provided on the diaphragm, and along the axial direction of the diaphragm, the projection of the valve port on the diaphragm does not overlap with the flow hole.

[0015] In one embodiment, the valve body includes a first valve tube and a second valve tube, and the outer wall of the valve seat protrudes to form a connecting boss, one end of the connecting boss is attached to and connected to the end of the first valve tube, and the other end is attached to and connected to the end of the second valve tube; or, the valve body is an integrated structure.

[0016] Compared with the prior art, the one-way valve provided by the present application, by providing an annular groove and an escape groove, the magnet can be easily inserted into the annular groove through the escape groove, which can greatly reduce the difficulty of installing the magnet compared to the traditional interference fit connection method. In addition, after the magnet is inserted into the annular groove, by rotating the magnet, the end of the magnet can form a stopper with the side walls of the annular groove along the axial direction of the valve seat while deviating from the escape groove, so that the magnet can only rotate without moving along the axial direction of the valve seat, further ensuring the reliability of the magnet installation. Further, after the magnet is installed, the escape groove can be processed to form a stopper, and the stopper is used to limit the rotation of the magnet to avoid the end of the magnet from being transferred into the escape groove again, effectively preventing the magnet from being separated from the annular groove. In this way, under the stopper effect of the side wall of the annular groove and the stopper, the magnet can be firmly limited to the valve seat, greatly improving the reliability of the magnet installation, thereby facilitating the reliability of the one-way valve when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A cross-sectional view of a one-way valve according to an embodiment of the present application;

[0019] Figure 2 A cross-sectional view of a valve seat assembly according to an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of a valve seat according to an embodiment of the present application;

[0021] Figure 4 A schematic structural diagram of a valve seat according to another embodiment of the present application.

[0022] The symbols in the figure mean the following:

[0023] 100, one-way valve; 10, valve body; 11, first valve tube; 12, second valve tube; 20, valve seat assembly; 21, valve seat; 2101, valve port; 2102, annular groove; 2103, avoidance groove; 2103a, stop point; 2104, limiting groove; 2104a, limiting point; 211, connecting boss; 22, magnet; 23, diaphragm; 24, limiting bracket; 2401, flow chamber; 2402, flow port; 241, limiting surface; 25, filter screen; 26, fixing ring. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0029] Diaphragm-type one-way valves are widely used in air-conditioning systems. They usually include a valve body, a valve seat, a magnet, and a diaphragm. The valve seat is installed in the valve body, and the valve seat is provided with a valve port for the circulation of the refrigerant. The magnet is in the shape of a long strip and installed in the valve seat, and the magnet can attract the diaphragm so that the diaphragm cover is arranged on the valve port. When the refrigerant flows in the forward direction, the refrigerant can overcome the magnetic force to break open the diaphragm and open the valve port. When the refrigerant flows in the reverse direction, the diaphragm will block the valve port under the magnetic force and the refrigerant pressure, thereby cutting off the valve port. That is, the diaphragm-type one-way valve realizes the one-way circulation of the refrigerant by means of the cooperation between the magnet and the diaphragm.

[0030] In the related art, the magnet is often installed and fixed by interference fit with the inner wall of the installation space on the valve seat. However, during use, the refrigerant flowing through the valve port will impact the magnet. Under the long-term impact, the magnet may become loose, causing the magnet to fall off the valve seat, thereby causing product failure.

[0031] See also Figure 1-Figure 4 In order to solve the problem that the existing magnet interference installation may fall off under the impact of refrigerant, the present application provides a one-way valve 100, which includes a valve body 10 and a valve seat assembly 20 installed in the valve body 10. The valve seat assembly 20 includes a valve seat 21 and a magnet 22. The valve seat 21 is provided with a valve port 2101 that axially penetrates the valve seat 21 and an annular groove 2102 that communicates with the valve port 2101. The annular groove 2102 has two side walls distributed along the axial direction of the valve seat 21, and one of the side walls is provided with an avoidance groove 2103 that penetrates the valve seat 21 along the axial direction. The end of the magnet 22 can be installed in the annular groove 2102 through the avoidance groove 2103, and the magnet 22 can rotate relative to the valve seat 21 at a preset angle along the circumference of the valve seat 21 in the annular groove 2102, so that the two side walls of the annular groove 2102 form an axial stop for the magnet 22. After the magnet 22 is installed in the annular groove 2102, the avoidance groove 2103 forms a stop portion, and when the magnet 22 rotates circumferentially in the annular groove 2102, it forms a stop with the stop portion to limit the end of the magnet 22 from rotating into the avoidance groove 2103, thereby preventing the magnet 22 from rotating to the avoidance groove 2103 position and escaping from the valve seat 21.

[0032] It is understandable that, by providing the annular groove 2102 and the avoidance groove 2103, the magnet 22 can be easily inserted into the annular groove 2102 through the avoidance groove 2103, which can greatly reduce the difficulty of installing the magnet 22 compared to the traditional interference fit connection method. In addition, after the magnet 22 is inserted into the annular groove 2102, by rotating the magnet 22, the end of the magnet 22 can form a stopper with the side walls of the annular groove 2102 along the axial sides of the valve seat 21 while deviating from the avoidance groove 2103, so that the magnet 22 can only rotate without moving along the axial direction of the valve seat 21, further ensuring the reliability of the installation of the magnet 22. Further, after the magnet 22 is installed, the avoidance groove 2103 can be processed to form a stopper, and the stopper is used to limit the rotation of the magnet 22 to prevent the end of the magnet 22 from being transferred into the avoidance groove 2103 again, effectively preventing the magnet 22 from being separated from the annular groove 2102. In this way, under the stopping action of the side wall of the annular groove 2102 and the stopping portion, the magnet 22 can be firmly limited to the valve seat 21, which greatly improves the reliability of the installation of the magnet 22, thereby facilitating the improvement of the reliability of the one-way valve 100 during operation.

[0033] The shape of the avoidance groove 2103 can be adapted to the shape of the end of the magnet 22 as long as the magnet 22 can be inserted.

[0034] Specifically, in one embodiment, the side of the opening where the avoidance groove 2103 communicates with the valve port 2101 is defined as a stop point 2103a, wherein each stop point 2103a can respond to external force to produce deformation toward the inside of the annular groove 2102 to form a stop portion.

[0035] That is, the stop point 2103a in this embodiment is the corner position of the avoidance groove 2103 close to the valve port 2101. In this way, the stop portion is simple to form and easy to process.

[0036] Of course, in other embodiments, the stopper may be provided as an independent structure and protrudedly connected to the side wall of the avoidance groove 2103 , as long as it can achieve the same stopping effect on the end of the magnet 22 .

[0037] It should be noted that when only one avoidance groove 2103 is provided on the annular groove 2102, the length of the magnet 22 can be reasonably controlled, one end of the magnet 22 can be inserted into the annular groove 2102, and the other end can be extended into the annular groove 2102 through the avoidance groove 2103, thereby realizing the installation of the magnet 22 and ensuring that the magnet 22 will not produce a large displacement along the radial direction of the valve seat 21. At this time, the two stop points 2103a on the avoidance groove 2103 both form a stopper to prevent the magnet 22 from rotating into the avoidance groove 2103 through the side of the avoidance groove 2103 that is not provided with a stopper when the magnet 22 rotates along the circumferential direction of the valve seat 21, thereby realizing reliable limiting between the magnet 22 and the valve seat 21.

[0038] In one embodiment, if Figure 3 As shown, there are two avoidance grooves 2103 , and the two avoidance grooves 2103 are arranged opposite to each other along the radial direction of the valve seat 21 . In this way, the difficulty of the magnet 22 extending into the annular clamping groove 2102 through the avoidance groove 2103 can be further reduced.

[0039] It can be understood that four stop points 2103 a are formed on the two avoidance grooves 2103 .

[0040] Furthermore, in one embodiment, any two stop points 2103a adjacent to each other along the circumference of the valve seat 21 are formed into stop parts. Thus, by processing any two adjacent stop points 2103a to form stop parts, when the magnet 22 rotates, one end must be able to achieve stop cooperation with the stop part, thereby preventing the end of the magnet 22 from entering the avoidance groove 2103 and causing the magnet 22 to be separated, thereby improving the reliability of the limited installation of the magnet 22. In addition, only two stop parts are processed, and the number of processes is small, which can improve the processing efficiency and reduce the processing cost.

[0041] Specifically, the two stop parts can be formed by processing two stop points 2103a on any avoidance groove 2103, or by processing a stop point 2103a on one avoidance groove 2103 and an adjacent stop point 2103a on another avoidance groove 2103. The specific setting can be reasonably made according to actual needs.

[0042] In another embodiment, all the stop points 2103a on the two avoidance grooves 2103 form stop parts. In this way, the reliability of the limit can be further improved, and both ends of the magnet 22 can be stopped when rotating, which improves the uniformity of the force and reduces the risk of the magnet 22 falling when one of the stop parts fails.

[0043] In one embodiment, if Figure 4As shown, the side wall of the annular groove 2102 is also provided with a limiting groove 2104, and the limiting groove 2104 and the avoidance groove 2103 are arranged at intervals along the circumference of the valve seat 21, and the side of the opening where the limiting groove 2104 communicates with the valve port 2101 is defined as a limiting point 2104a, and each limiting point 2104a can respond to external force to produce deformation toward the inside of the annular groove 2102 to form a limiting portion. Among them, the limiting portion can stop the magnet 22 along the circumference of the valve seat 21 to prevent the end of the magnet 22 from rotating along the circumference of the valve seat 21.

[0044] By opening a limit groove 2104 and processing the limit point 2104a on the limit groove 2104 to form a limit portion, the limit portion can have the same stopping effect as the stop portion, and the two can cooperate with each other to limit the rotation range of the magnet 22 along the circumference of the valve seat 21, thereby reducing the risk of damage or breakage caused by long-term rotation of the magnet 22.

[0045] Among them, the groove width of the limiting groove 2104 along the circumference of the valve seat 21 can be reasonably set. For example, the groove width of the limiting groove 2104 along the circumference of the valve seat 21 can be set to be smaller than the groove width of the avoidance groove 2103 along the circumference of the valve seat 21, so as to prevent the magnet 22 from falling off through the limiting groove 2104 and improve safety. Alternatively, the groove width of the limiting groove 2104 along the circumference of the valve seat 21 can also be set to be greater than or equal to the groove width of the avoidance groove 2103 along the circumference of the valve seat 21. In this case, the magnet 22 can also be inserted into the annular groove 2102 through the limiting groove 2104, reducing the difficulty of installing the magnet 22. That is, the limiting groove 2104 does not require high processing accuracy, which can effectively reduce the processing difficulty and processing cost.

[0046] For the sake of convenience, the present application only briefly describes the example that the width of the limit groove 2104 is equal to the width of the avoidance groove 2103. In this case, the limit groove 2104 can play a substantially same function as the avoidance groove 2103. In addition, the limit point 2104a on the limit groove 2104 and the stop point 2103a on the avoidance groove 2103 can be processed into a limit portion or a stop portion according to actual needs, as long as they can prevent the magnet 22 from detaching.

[0047] Specifically, in one embodiment, the stopper portion is a riveted structure, which facilitates the molding of the stopper portion and reduces the difficulty of processing the stopper portion.

[0048] In one embodiment, the limiting portion is a riveted structure, which facilitates the forming of the limiting portion and reduces the difficulty of processing the limiting portion.

[0049] In one embodiment, if Figure 4 As shown, there are two limiting grooves 2104, and the two limiting grooves 2104 are arranged opposite to each other along the radial direction of the valve seat 21. In this way, the reliability of the limiting part limiting the magnet 22 can be further improved.

[0050] In one embodiment, the shortest distance between the limiting portion and the stopper portion is equal to the width of the magnet 22. In this way, the ends of the magnet 22 can be stopped by the limiting portion and the stopper portion on both sides along the circumference of the valve seat 21, thereby achieving the fixation of the magnet 22, effectively avoiding the damage of the magnet 22 due to rotation, and improving the service life of the magnet 22.

[0051] However, the invention is not limited thereto. In other embodiments, the shortest distance between the limiting portion and the stopping portion may be slightly larger than the width of the magnet 22 , so that the magnet 22 can only rotate within a small range.

[0052] In one embodiment, if Figure 1 and Figure 2 As shown, the valve seat assembly 20 further includes a diaphragm 23, which is movably disposed at one end of the valve seat 21, and the diaphragm 23 and the magnet 22 are magnetically matched, and can be blocked at the valve port 2101 under the adsorption action of the magnet 22. In this way, the diaphragm 23 can close the valve port 2101 when there is no refrigerant flowing by cooperating with the magnet 22.

[0053] Preferably, the avoidance groove 2103 and the limiting groove 2104 are both provided at one end of the limiting groove away from the diaphragm 23 to reduce the influence on the cooperation between the valve seat 21 and the diaphragm 23 .

[0054] When refrigerant enters the one-way valve 100, and flows into the valve port 2101 from the end of the valve seat 21 away from the diaphragm 23 and impacts the diaphragm 23, the refrigerant can overcome the magnetic force and push the diaphragm 23 away from the valve port 2101 under the action of the refrigerant flow pressure, thereby opening the valve port 2101. If the refrigerant flows in the opposite direction from one side of the diaphragm 23 toward the valve port 2101, the diaphragm 23 will fit tightly with the valve seat 21 under the action of the refrigerant pressure and the magnetic force of the magnet 22, thereby ensuring the closure of the valve port 2101.

[0055] Based on this, in order to prevent the diaphragm 23 from moving too far away from the valve port 2101 when the valve port 2101 is opened, so that the diaphragm 23 cannot close the valve port 2101 again, in one embodiment, the valve seat assembly 20 further includes a limit bracket 24, one end of which is connected to the valve seat 21, and the other end forms a limit surface 241. The diaphragm 23 is movably installed in the limit bracket 24, and when the diaphragm 23 moves in the direction away from the valve seat 21 under the action of an external force, the diaphragm 23 can be stopped at the limit surface 241. In this way, the diaphragm 23 can be reliably limited by the limit surface 241 on the limit bracket 24.

[0056] Specifically, the limiting bracket 24 and the valve seat 21 are fixedly connected by welding or clamping, and a flow cavity 2401 communicating with the valve port 2101 is formed between the limiting bracket 24 and the valve seat 21, and a flow port 2402 communicating with the flow cavity 2401 is opened on the peripheral side of the limiting bracket 24, so that the smooth flow of the refrigerant can be achieved. Among them, the end surface of the limiting bracket 24 located at the end of the flow cavity 2401 away from the valve seat 21 forms a limiting surface 241.

[0057] In another embodiment, the inner wall of the valve body 10 is protruded toward the direction close to the axis to form a protrusion (not shown), and the diaphragm 23 is arranged between the valve seat 21 and the protrusion, and when the diaphragm 23 moves toward the direction away from the valve seat 21, the diaphragm 23 can be stopped by the protrusion. In this way, the movement of the diaphragm 23 can also be limited.

[0058] Specifically, the raised portion may be a plurality of raised structures spaced apart along the circumference of the valve body 10, or the raised portion may be a raised ring structure extending along the circumference of the valve body 10. In this way, the raised portion has a simple structure and is easy to process.

[0059] Furthermore, in one embodiment, a flow hole is provided on the diaphragm 23, and along the axial direction of the diaphragm 23, the projection of the valve port 2101 on the diaphragm 23 and the flow hole do not overlap each other, and the projection position of the valve port 2101 on the diaphragm 23 is located on the inner side of the flow hole on the diaphragm 23. In this way, when the diaphragm 23 is matched with the stopper of the raised portion, the refrigerant can smoothly flow through the flow hole on the diaphragm 23, and when the diaphragm 23 is sealed with the valve seat 21, since the flow hole and the valve port 2101 do not interfere with each other, the sealing effect of the diaphragm 23 on the valve port 2101 can be ensured.

[0060] In order to filter impurities in the refrigerant, in one embodiment, the valve seat assembly 20 further includes a filter screen 25 . The filter screen 25 is disposed at one end of the valve seat 21 away from the diaphragm 23 and connected to the valve seat 21 .

[0061] Furthermore, since the existing filter screen 25 is often fixed to the valve seat 21 by welding, if one of them is damaged or its performance does not meet the standard, the entire filter screen 25 will be scrapped, thereby greatly increasing the cost.

[0062] Therefore, in order to further reduce the cost of the one-way valve 100, in one embodiment, the valve seat assembly 20 further includes a fixing ring 26, which is sleeved on one end of the valve seat 21 and connected to the valve seat 21. One end of the filter 25 is sandwiched between the fixing ring 26 and the valve seat 21. In this way, not only can the filter 25 be firmly installed, but also the filter 25 can be disassembled, so that a single component can be easily replaced, which greatly reduces the production cost.

[0063] In one embodiment, if Figure 1As shown, the valve body 10 includes a first valve tube 11 and a second valve tube 12, and the outer wall of the valve seat 21 protrudes to form a connecting boss 211, one end of the connecting boss 211 is attached to and connected to the end of the first valve tube 11, and the other end is attached to and connected to the end of the second valve tube 12. In this way, the installation of the valve seat 21 is simpler, and the overall processing and molding efficiency of the one-way valve 100 can be improved.

[0064] Specifically, the first valve tube 11, the second valve tube 12 and the valve seat 21 can be fixed by laser welding. At the same time, in order to avoid shaking between them during the welding process, the first valve tube 11, the second valve tube 12 and the valve seat 21 can be pre-fixed by interference fit, thereby improving the reliability of welding.

[0065] In other embodiments, the valve body 10 may also be configured as an integrated structure. In this case, the valve body 10 may be connected to the valve seat 21 by necking or the like, thereby achieving fixed installation of the valve seat 21 in the valve body 10 .

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A one-way valve, comprising a valve body (10) and a valve seat assembly (20) installed in the valve body (10), characterized in that: The valve seat assembly (20) comprises a valve seat (21) and a magnet (22); the valve seat (21) is provided with a valve port (2101) which penetrates the valve seat (21) in the axial direction, and an annular groove (2102) which is in communication with the valve port (2101); the annular groove (2102) has two side walls which are distributed in the axial direction of the valve seat (21), and one of the side walls is provided with an avoidance groove (2103) which penetrates the valve seat (21) in the axial direction; The end of the magnet (22) can be installed in the annular groove (2102) through the avoidance groove (2103), and the magnet (22) can be rotated in the annular groove (2102) relative to the valve seat (21) at a preset angle along the circumference of the valve seat (21), so that the two side walls of the annular groove (2102) form an axial stop for the magnet (22); After the magnet (22) is installed in the annular groove (2102), the avoidance groove (2103) forms a stopper, and when the magnet (22) rotates circumferentially in the annular groove (2102), it forms a stopper with the stopper to limit the end of the magnet (22) from rotating into the avoidance groove (2103), thereby preventing the magnet (22) from rotating to the avoidance groove (2103) and escaping from the valve seat (21).

2. The one-way valve according to claim 1, characterized in that: The side portion of the opening where the avoidance groove (2103) communicates with the valve port (2101) is defined as a stop point (2103a), wherein each of the stop points (2103a) can deform toward the inside of the annular groove (2102) in response to an external force to form the stop portion.

3. The one-way valve according to claim 2, characterized in that: The number of the avoidance grooves (2103) is two, and the two avoidance grooves (2103) are arranged opposite to each other along the radial direction of the valve seat (21); Wherein, any two of the stop points (2103a) adjacent to each other along the circumference of the valve seat (21) form the stop portion, or all of the stop points (2103a) form the stop portion.

4. The one-way valve according to any one of claims 1 to 3, characterized in that: The side wall of the annular groove (2102) is also provided with a limiting groove (2104), and the limiting groove (2104) and the avoiding groove (2103) are arranged at intervals along the circumference of the valve seat (21), and the side of the opening where the limiting groove (2104) communicates with the valve port (2101) is defined as a limiting point (2104a), and each of the limiting points (2104a) can produce a deformation toward the inside of the annular groove (2102) in response to an external force, so as to form a limiting portion; The limiting portion is capable of stopping the magnet (22) along the circumferential direction of the valve seat (21) to prevent the end of the magnet (22) from rotating along the circumferential direction of the valve seat (21).

5. The one-way valve according to claim 4, characterized in that: The shortest distance between the limiting portion and the stopping portion is equal to the width of the magnet (22).

6. The one-way valve according to claim 4, characterized in that: The number of the limiting grooves (2104) is two, and the two limiting grooves (2104) are arranged opposite to each other along the radial direction of the valve seat (21).

7. The one-way valve according to claim 4, characterized in that: The stopper portion is a riveted structure; and / or the limiting portion is a riveted structure.

8. The one-way valve according to claim 1, characterized in that: The valve seat assembly (20) further comprises a diaphragm (23) and a limit bracket (24); one end of the limit bracket (24) is connected to the valve seat (21), and the other end forms a limit surface (241); The diaphragm (23) is movably installed in the limiting bracket (24), and the diaphragm (23) and the magnet (22) are magnetically matched and can be blocked at the valve port (2101) under the adsorption effect of the magnet (22); When the diaphragm (23) moves in a direction away from the valve seat (21) under the action of an external force, the diaphragm (23) can be stopped at the limiting surface (241).

9. The one-way valve according to claim 1, characterized in that: The valve seat assembly (20) further comprises a diaphragm (23), the inner wall of the valve body (10) protrudes in a direction close to the axis to form a protrusion, the diaphragm (23) is arranged between the valve seat (21) and the protrusion, and when the diaphragm (23) moves in a direction away from the valve seat (21), the diaphragm (23) can stop at the protrusion.

10. The one-way valve according to claim 1, characterized in that: The valve body (10) comprises a first valve tube (11) and a second valve tube (12); an outer side wall of the valve seat (21) is protruded to form a connecting boss (211); one end of the connecting boss (211) is attached to and connected to the end of the first valve tube (11), and the other end is attached to and connected to the end of the second valve tube (12); Alternatively, the valve body (10) is an integrated structure.

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