Check valve and machining method therefor

Abstract

A check valve (100) and a machining method therefor. The check valve (100) comprises a valve body (10) and a valve seat assembly (20), wherein the valve seat assembly (20) comprises a valve seat (21), a magnet (22) and an annular clamping groove (2102), and one side wall of the annular clamping groove (2102) is formed with an avoidance groove (2103). An end portion of the magnet (22) is mounted in the annular clamping groove (2102) by means of the avoidance groove (2103), and the magnet (22) is capable of rotating by a preset angle relative to the valve seat (21) in the circumferential direction of the valve seat (21) in the annular clamping groove (2102). After the magnet (22) is mounted in the annular clamping groove (2102), the avoidance groove (2103) forms a stop portion, and the magnet (22) forms a stop with the stop portion when rotating in the circumferential direction, so as to prevent the magnet (22) from being released from the valve seat (21) when rotating to the position of the avoidance groove (2103).

Description

Check valve and processing method thereof

[0001] Related applications

[0002] The present application claims priority to Chinese Patent Application No. 202410841179.7, filed on June 26, 2024, entitled “Check valve and processing method thereof”, and Chinese Patent Application No. 202421487899.X, filed on June 26, 2024, entitled “Check valve”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of check valves, and in particular to a check valve and a processing method thereof. BACKGROUND

[0004] Diaphragm check valves are widely used in air conditioning systems, which generally 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 flow of refrigerant. The magnet is in the form of a long strip and is installed in the valve seat. The magnet can attract the diaphragm, so that the diaphragm covers the valve port. When the refrigerant flows in the forward direction, the refrigerant can overcome the magnetic force and thus push 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 action of the magnetic force and the refrigerant pressure, thereby achieving the blocking of the valve port. That is, the diaphragm check valve uses the cooperation between the magnet and the diaphragm to achieve the one-way flow of the refrigerant.

[0005] In related technologies, the magnet is often installed and fixed by interference fit with the inner wall of the mounting space on the valve seat. However, during use, the refrigerant flowing through the valve port will impact the magnet, and under the long-term impact, the magnet may become loose, causing the magnet to fall off the valve seat, thereby causing product failure. SUMMARY

[0006] Therefore, it is necessary to provide a check valve and a processing method thereof.

[0007] The application provides a one-way valve, which comprises a valve body and a valve seat assembly installed in the valve body, wherein the valve seat assembly comprises a valve seat and a magnet, the valve seat is provided with a valve port penetrating through the valve seat in the axial direction and an annular clamping groove in communication with the valve port, the annular clamping groove is provided with two side walls distributed in the axial direction of the valve seat, and one of the side walls is provided with an avoiding groove penetrating through itself in the axial direction of the valve seat; the end of the magnet can be installed into the annular clamping groove through the avoiding groove, and the magnet can rotate in the circumferential direction of the valve seat in the annular clamping groove by a preset angle relative to the valve seat, so that the two side walls of the annular clamping groove axially stop the magnet; after the magnet is installed into the annular clamping groove, the avoiding groove forms a stop portion, and the magnet forms a stop with the stop portion when it rotates in the circumferential direction in the annular clamping groove, so as to limit the rotation of the end of the magnet into the avoiding groove and avoid the magnet from being separated from the valve seat when it rotates to the position of the avoiding groove.

[0008] In one of the embodiments, the side part of the opening of the avoiding groove in communication with the valve port is defined as a stop point, wherein each of the stop points can be deformed towards the inside of the annular clamping groove in response to external force, so as to form the stop portion.

[0009] In one of the embodiments, the number of the avoiding grooves is two, and the two avoiding grooves are oppositely arranged in the radial direction of the valve seat; wherein any two adjacent stop points in the circumferential direction of the valve seat form the stop portion, or all the stop points form the stop portion.

[0010] In one of the embodiments, the side wall of the annular clamping groove is further provided with a limiting groove, the limiting groove is arranged in the circumferential direction of the valve seat and spaced from the avoiding groove, the side part of the opening of the limiting groove in communication with the valve port is defined as a limiting point, and each of the limiting points can be deformed towards the inside of the annular clamping groove in response to external force, so as to form a limiting portion; wherein the limiting portion can stop the magnet in the circumferential direction of the valve seat, so as to prevent the end of the magnet from rotating in the circumferential direction of the valve seat.

[0011] In one of the embodiments, the shortest distance between the limiting portion and the stop portion is equal to the width of the magnet; and / or, the number of the limiting grooves is two, and the two limiting grooves are oppositely arranged in the radial direction of the valve seat.

[0012] In one of the embodiments, the stop portion is a riveting forming structure; and / or, the limiting portion is a riveting forming structure.

[0013] In one of the embodiments, the valve seat assembly further comprises a diaphragm and a limiting support, one end of the limiting support is connected to the valve seat, and the other end forms a limiting portion; the diaphragm is movably installed in the limiting support, and the diaphragm and the magnet are magnetically matched and can be sealed to the valve port under the adsorption of the magnet; when the diaphragm moves away from the valve seat under the action of external force, the diaphragm can be stopped at the limiting portion and be in line surface contact or face contact with the limiting portion.

[0014] In one of the embodiments, the limiting support comprises a main body portion and a limiting portion, one end of the main body portion is connected to the valve seat, and the other end is used for connecting the limiting portion, and the limiting support and the valve seat enclose a flow cavity, and the diaphragm is movably installed in the flow cavity to open or close the valve port; wherein the limiting portion is arranged at an angle with the main body portion, and one end of the limiting portion away from the main body portion extends towards the inside of the flow cavity and forms a stopping plane or a stopping protrusion; when the diaphragm moves towards the valve seat, the diaphragm can be in sealing abutment with the valve seat, and the valve port is closed; when the diaphragm moves away from the valve seat, the diaphragm can abut against the stopping plane and be in face contact with the stopping plane, or the diaphragm can abut against the stopping protrusion and be in line surface contact with the stopping protrusion, and the valve port is opened.

[0015] In one of the embodiments, the main body portion comprises a columnar segment and an arcuate segment, one end of the arcuate segment is connected to the columnar segment, and the other end is connected to the limiting portion; wherein the limiting portion is provided with a through hole communicating with the flow cavity.

[0016] In one of the embodiments, the limiting portion, the columnar segment and the arcuate segment are an integral bending forming structure.

[0017] In one of the embodiments, along the axial direction of the limiting support, the vertical distance from the stopping protrusion to the connection between the limiting portion and the arcuate segment is defined as H1, and the vertical distance from the connection between the limiting portion and the arcuate segment to the connection between the arcuate segment and the columnar segment is defined as h1, and H1>h1 is satisfied.

[0018] In one of the embodiments, the main body portion comprises a columnar segment, an arcuate segment and a sealing segment, the sealing segment is sealed to one end of the flow cavity, and the peripheral side of the sealing segment is connected to the arcuate segment and connected to the columnar segment through the arcuate segment; wherein the limiting portion protrudes and is connected to the end face of the sealing segment close to the flow cavity.

[0019] In one of the embodiments, the vertical distance from the connection between the stop protrusion and the limiting portion to the sealing section is defined as H2, and the vertical distance from the connection between the sealing section and the arc-shaped section to the connection between the arc-shaped section and the columnar section is defined as h2, and H2>h2.

[0020] In one of the embodiments, the one-way valve further comprises a filter screen, which is arranged at one end of the valve seat away from the diaphragm and connected with the valve seat.

[0021] In one of the embodiments, the one-way valve further comprises a fixing ring, which is sleeved on one end of the valve seat and connected with the valve seat; and one end of the filter screen is clamped between the fixing ring and the valve seat.

[0022] In one of the embodiments, the valve seat assembly further comprises a diaphragm, the inner wall of the valve body is protruded to form a protruding portion in the direction close to the axis, the diaphragm is arranged between the valve seat and the protruding portion, and the diaphragm can be stopped at the protruding portion when the diaphragm moves away from the valve seat.

[0023] In one of the embodiments, the protruding portion comprises a plurality of stop protrusions arranged at intervals in the axial direction of the inner wall of the valve body; or the protruding portion is a stop protrusion ring extending in the circumferential direction of the inner wall of the valve body.

[0024] In one of the embodiments, the diaphragm is provided with a flow hole, and the projection of the valve port on the diaphragm and the flow hole do not overlap each other in the axial direction of the diaphragm, and the projection position of the valve port on the diaphragm is located inside the flow hole on the diaphragm.

[0025] In one of the embodiments, the valve body comprises a first valve pipe and a second valve pipe, the outer side wall of the valve seat is protruded to form a connecting boss, one end of the connecting boss is attached to and connected with the end of the first valve pipe, and the other end is attached to and connected with the end of the second valve pipe; or the valve body is of an integrated structure.

[0026] The application further provides a processing method of a one-way valve, which is used for processing the one-way valve in any one of the above embodiments, and the processing method comprises the following steps: processing a valve port and an annular clamping groove on a valve seat, and cutting a avoiding groove on one side wall of the annular clamping groove; inserting the end of a magnet into the annular clamping groove through the avoiding groove, and rotating by a preset angle; riveting a stop point on the avoiding groove to deform the stop point towards the inside of the annular clamping groove; and connecting the valve seat with a valve body.

[0027] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0028] To better describe and illustrate embodiments and / or examples of those inventions disclosed herein, reference can be made to one or more drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, presently described embodiments and / or examples, and the best mode presently contemplated of those inventions.

[0029] Fig. 1 is a sectional view of a one-way valve according to an embodiment provided by the present application.

[0030] Fig. 2 is a sectional view of a valve seat assembly according to an embodiment provided by the present application.

[0031] Fig. 3 is a structural schematic view of a valve seat according to an embodiment provided by the present application.

[0032] Fig. 4 is a structural schematic view of a valve seat according to another embodiment provided by the present application.

[0033] Fig. 5 is a sectional view of a one-way valve according to an embodiment provided by the present application.

[0034] Fig. 6 is a sectional view of a valve seat assembly according to an embodiment provided by the present application.

[0035] Fig. 7 is a structural schematic view of a limiting support according to an embodiment provided by the present application.

[0036] Fig. 8 is a sectional view of a one-way valve according to an embodiment provided by the present application.

[0037] Fig. 9 is an enlarged view of the structure at Q in Fig. 8.

[0038] The meanings of the symbols in the drawings are as follows: 100, one-way valve; 10, valve body; 11, first valve pipe; 12, second valve pipe; 20, valve seat assembly; 21, valve seat; 2101, valve port; 2102, annular clamping groove; 2103, avoiding groove; 2103a, stopping point; 2104, limiting groove; 2104a, limiting point; 211, connecting boss; 22, magnet; 23, diaphragm; 231, flow hole; 24, limiting support; 2401, flow cavity; 2402, flow port; 2403, through hole; 241, main body part; 2411, columnar segment; 2412, arcuate segment; 242, limiting part; 2421, stopping plane; 2422, stopping ridge; 25, filter screen; 26, fixing ring; 27, protruding part. DETAILED DESCRIPTION

[0039] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid obscuring the present application.

[0040] It is to be noted that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements or layers present. The use of the term "on" or "connected to" includes direct contact between the elements.

[0041] In addition, the terms "first", "second", etc. are used herein only to describe various elements, but do not imply or suggest relative importance or a quantity of the indicated elements. Thus, the features defined with "first", "second", etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In the present application, unless otherwise explicitly specified and limited, "on", "under", "above", and "over" of a first element to a second element can mean that the first element is in direct contact with the second element, or the first element is in indirect contact with the second element through an intermediate medium. Moreover, "on", "above", and "over" of a first element to a second element can mean that the first element is directly above or obliquely above the second element, or only means that the first element is horizontally higher than the second element. "Under", "below", and "underneath" of a first element to a second element can mean that the first element is directly below or obliquely below the second element, or only means that the first element is horizontally lower than the second element.

[0043] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0044] The diaphragm type one-way valve is widely used in air conditioning systems, which usually includes 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 flow of refrigerant. The magnet is in the form of a long strip and is installed in the valve seat. The magnet can attract the diaphragm, so that the diaphragm covers the valve port. When the refrigerant flows in the forward direction, the refrigerant can overcome the magnetic force and 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 action of the magnetic force and the refrigerant pressure, thereby achieving the blocking of the valve port. That is, the diaphragm type one-way valve uses the cooperation between the magnet and the diaphragm to achieve the one-way flow of the refrigerant.

[0045] In the related art, the magnet is usually installed and fixed by interference fit with the inner wall of the mounting space on the valve seat. However, during use, the refrigerant flowing through the valve port will impact the magnet, and under the long-term impact, the magnet may become loose, causing the magnet to fall off the valve seat, thereby causing product failure.

[0046] Please refer to FIGS. 1-4, to solve the problem of magnet falling off under the impact of refrigerant in the related art due to interference installation, 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 extending through the valve seat 21 in the axial direction and an annular clamping groove 2102 communicating with the valve port 2101. The annular clamping 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 extending through itself along the axial direction of the valve seat 21. The end of the magnet 22 can be installed into the annular clamping groove 2102 through the avoidance groove 2103, and the magnet 22 can rotate a predetermined angle in the circumferential direction of the valve seat 21 relative to the valve seat 21 in the annular clamping groove 2102, so that the two side walls of the annular clamping groove 2102 form axial stop for the magnet 22. After the magnet 22 is installed into the annular clamping groove 2102, the avoidance groove 2103 forms a stop portion, and when the magnet 22 rotates circumferentially in the annular clamping groove 2102, the stop portion forms a stop for the magnet 22, so as to limit the end of the magnet 22 from rotating into the avoidance groove 2103, and prevent the magnet 22 from rotating to the avoidance groove 2103 position and falling out of the valve seat 21.

[0047] It can be understood that the application can be understood by opening the annular clamping groove 2102 and the avoiding groove 2103, and the magnet 22 can be easily inserted into the annular clamping groove 2102 through the avoiding groove 2103. Compared with the traditional interference fit connection mode, the installation difficulty of the magnet 22 can be greatly reduced. Moreover, after the magnet 22 is inserted into the annular clamping groove 2102, by rotating the magnet 22, the end portion of the magnet 22 can form a stop cooperation with the side wall of the annular clamping groove 2102 on both sides of the valve seat 21 axis direction while deviating from the avoiding groove 2103, so that the magnet 22 can only rotate and cannot move along the valve seat 21 axis direction, further ensuring the reliability of the magnet 22 installation. Further, after the magnet 22 is installed, the avoiding groove 2103 can be processed to form a stop portion, and the rotation of the magnet 22 is limited by the stop portion, so as to avoid the end portion of the magnet 22 from rotating into the avoiding groove 2103, effectively preventing the magnet 22 from separating from the annular clamping groove 2102. In this way, under the stop action of the side wall of the annular clamping groove 2102 and the stop portion, the magnet 22 can be firmly limited to the valve seat 21, greatly improving the reliability of the magnet 22 installation, thereby facilitating the improvement of the reliability of the one-way valve 100 during operation.

[0048] Wherein, the shape of the avoiding groove 2103 can be matched with the shape of the end portion of the magnet 22, as long as it can meet the insertion of the magnet 22.

[0049] Specifically, in an embodiment, the side portion of the opening of the avoiding groove 2103 communicated with the valve port 2101 is defined as a stop point 2103a, wherein each stop point 2103a can deform towards the inside of the annular clamping groove 2102 in response to external force to form a stop portion.

[0050] That is, the stop point 2103a in the embodiment is the corner position of the avoiding groove 2103 close to the valve port 2101. In this way, the stop portion is simple in forming and easy to process.

[0051] Of course, in other embodiments, the stop portion can also be provided as an independent structure and protrude on the side wall of the avoiding groove 2103, as long as it can have the same stop effect on the end portion of the magnet 22.

[0052] It should be noted that when only one avoiding slot 2103 is arranged on the annular clamping groove 2102, the length of the magnet 22 can be reasonably controlled, one end of the magnet 22 is inserted into the annular clamping groove 2102, and the other end extends into the annular clamping groove 2102 through the avoiding slot 2103, so that the installation of the magnet 22 is realized, and it is ensured that the magnet 22 does not produce a larger displacement along the radial direction of the valve seat 21. At this time, the two stop points 2103a on the avoiding slot 2103 form stop portions, so as to prevent the magnet 22 from rotating into the avoiding slot 2103 through the side of the avoiding slot 2103 which is not provided with the stop portion 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.

[0053] In an embodiment, as shown in FIG. 3, the number of avoiding slots 2103 is two, and the two avoiding slots 2103 are oppositely arranged 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 avoiding slot 2103 can be further reduced.

[0054] Among them, it can be understood that four stop points 2103a are formed on the two avoiding slots 2103.

[0055] Further, in an embodiment, any two adjacent stop points 2103a along the circumferential direction of the valve seat 21 form stop portions. In this way, by machining the stop portions on any two adjacent stop points 2103a, when the magnet 22 rotates, one end of the magnet 22 can be stopped by the stop portion, thereby preventing the end of the magnet 22 from entering the avoiding slot 2103 and causing the magnet 22 to be separated, and improving the reliability of the limiting installation of the magnet 22. Moreover, only two stop portions are machined, the number of machining is less, the machining efficiency can be improved, and the machining cost can be reduced.

[0056] Specifically, the two stop portions can be machined by the two stop points 2103a on any one avoiding slot 2103, or can be machined by the stop point 2103a on one avoiding slot 2103 and the adjacent stop point 2103a on the other avoiding slot 2103, and the specific setting can be reasonably set according to actual needs.

[0057] In another embodiment, all stop points 2103a on the two avoiding slots 2103 form stop portions. In this way, the reliability of the limiting can be further improved, both ends of the magnet 22 can be stopped when the magnet 22 rotates, the uniformity of the force is improved, and the risk of the magnet 22 falling when one of the stop portions fails is reduced.

[0058] In an embodiment, as shown in FIG. 4, the side wall of the annular clamping groove 2102 is further provided with a limiting groove 2104, the limiting groove 2104 is arranged along the circumferential direction of the valve seat 21 and spaced apart from the avoiding groove 2103, the side part of the opening of the limiting groove 2104 and the valve port 2101 is defined as a limiting point 2104a, and each limiting point 2104a can be deformed towards the inside of the annular clamping groove 2102 in response to an external force to form a limiting part. Wherein, the limiting part can stop 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.

[0059] By opening the limiting groove 2104 and processing the limiting point 2104a on the limiting groove 2104 to form the limiting part, the limiting part can have the same stopping effect as the stopping part, and the two can cooperate to limit the rotation range of the magnet 22 along the circumferential direction of the valve seat 21, thereby reducing the risk of damage or breakage caused by long-term rotation of the magnet 22.

[0060] Wherein, the slot width of the limiting groove 2104 along the circumferential direction of the valve seat 21 can be reasonably set. For example, the slot width of the limiting groove 2104 along the circumferential direction of the valve seat 21 can be less than the slot width of the avoiding groove 2103 along the circumferential direction of the valve seat 21 to avoid the magnet 22 from falling off through the limiting groove 2104 and improve safety. Alternatively, the slot width of the limiting groove 2104 along the circumferential direction of the valve seat 21 can be greater than or equal to the slot width of the avoiding groove 2103 along the circumferential direction of the valve seat 21, at this time, the magnet 22 can also be inserted into the annular clamping groove 2102 through the limiting groove 2104, reducing the installation difficulty of the magnet 22. That is, the limiting groove 2104 does not require high processing precision, which can effectively reduce the processing difficulty and processing cost.

[0061] For the sake of convenience, this application only takes the slot width of the limiting groove 2104 equal to the slot width of the avoiding groove 2103 as an example for brief description, at this time, the limiting groove 2104 can have basically the same function as the avoiding groove 2103. And the limiting point 2104a on the limiting groove 2104 and the stopping point 2103a on the avoiding groove 2103 can be processed into limiting parts or stopping parts according to actual needs, as long as they can have the effect of preventing the magnet 22 from falling off.

[0062] Specifically, in an embodiment, the stopping part is a riveting forming structure, so that the forming of the stopping part is facilitated, and the processing difficulty of the stopping part can be reduced.

[0063] In an embodiment, the limiting part is a riveting forming structure, so that the forming of the limiting part is facilitated, and the processing difficulty of the limiting part can be reduced.

[0064] In an embodiment, as shown in FIG. 4, the number of limiting grooves 2104 is two, and the two limiting grooves 2104 are arranged opposite 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.

[0065] In an embodiment, the shortest distance between the limiting portion and the stop portion is equal to the width of the magnet 22. In this way, the end of the magnet 22 along the two sides of the circumference of the valve seat 21 can be stopped by the limiting portion and the stop portion, so as to achieve the fixation of the magnet 22, effectively avoid the damage of the magnet 22 due to rotation, and improve the service life of the magnet 22.

[0066] However, the shortest distance between the limiting portion and the stop portion can also be slightly greater than the width of the magnet 22 in other embodiments, so that the magnet 22 can only rotate within a small range.

[0067] In an embodiment, as shown in FIGS. 1 and 2, the valve seat assembly 20 further comprises a diaphragm 23 movably arranged 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 of the magnet 22. In this way, the diaphragm 23 can realize the closing of the valve port 2101 when there is no refrigerant flow by cooperating with the magnet 22.

[0068] In an embodiment, the avoiding groove 2103 and the limiting groove 2104 are both arranged at the end of the limiting groove away from the diaphragm 23, so as to reduce the influence on the cooperation between the valve seat 21 and the diaphragm 23.

[0069] Specifically, when the refrigerant enters the one-way valve 100, and the refrigerant 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, so as to realize the opening of the valve port 2101. If the refrigerant flows from the side of the diaphragm 23 to the valve port 2101 in the opposite direction, the diaphragm 23 will be tightly attached to the valve seat 21 under the action of the refrigerant pressure and the magnetic force of the magnet 22, so as to ensure the closing of the valve port 2101.

[0070] Based on this, in order to avoid that the diaphragm 23 moves too far away from the valve port 2101 when the valve port 2101 is opened, so that the diaphragm 23 cannot realize the closing of the valve port 2101 again, in an embodiment, the valve seat assembly 20 further comprises a limiting support 24, one end of the limiting support 24 is connected to the valve seat 21, and the other end forms a limiting portion 242. The diaphragm 23 is movably arranged in the limiting support 24, and the diaphragm 23 can be stopped at the limiting portion 242 when the diaphragm 23 moves away from the valve seat 21 under the action of an external force. In this way, the reliable limiting of the diaphragm 23 can be realized by the limiting portion 242 on the limiting support 24.

[0071] In an embodiment, the limiting portion 242 is formed with a stop surface 2422 on a side facing the valve port 2101, and the diaphragm 23 is stopped by the stop surface 2422. In other words, the stop cooperation between the limiting portion 242 and the diaphragm 23 is achieved by surface-to-surface contact. It can be understood that in other embodiments, the stop cooperation between the limiting portion 242 and the diaphragm 23 can also be achieved by line-to-surface contact.

[0072] The limiting bracket 24 and the valve seat 21 are fixedly connected by welding or clamping, and the limiting bracket 24 and the valve seat 21 are surrounded to form a flow cavity 2401 in communication with the valve port 2101. The limiting bracket 24 is provided with a flow port 2402 in communication with the flow cavity 2401 on the side surface, so that the smooth flow of the refrigerant can be achieved. The end surface of the limiting bracket 24 at the end away from the valve seat 21 of the flow cavity 2401 is formed with a stop surface 2421.

[0073] Specifically, the limiting bracket 24 includes a main body portion 241 and a limiting portion 242. One end of the main body portion 241 is connected to the valve seat 21, and the other end is used to connect the limiting portion 242. The limiting bracket 24 and the valve seat 21 surround to form a flow cavity 2401, and the diaphragm 23 is movably installed in the flow cavity 2401 to open or close the valve port 2101. The limiting portion 242 is arranged at an angle with the main body portion 241, and the end of the limiting portion 242 away from the main body portion 241 extends towards the inside of the flow cavity 2401 and is formed with a stop surface 2421.

[0074] It should be noted that in the present embodiment, the angle between the limiting portion 242 and the main body portion 241 is 90 degrees, so that the stop surface 2421 formed is parallel to the upper surface of the diaphragm 23 to form surface-to-surface contact.

[0075] In this way, when the diaphragm 23 moves towards the valve seat 21, the diaphragm 23 can be in sealing abutment with the valve seat 21, and the valve port 2101 is closed; when the diaphragm 23 moves away from the valve seat 21, the diaphragm 23 can abut against the stop surface 2421 and form surface-to-surface contact with the stop surface 2421, at this time, the valve port 2101 is opened.

[0076] In one embodiment, the limiting portion 242 is in line-face contact with the diaphragm 23. Specifically, referring to FIGS. 5-7, the limiting portion 242 is arranged at an angle with the main body portion 241, and the end of the limiting portion 242 away from the main body portion 241 extends towards the inside of the flow cavity 2401 and forms a stop protrusion 2422. In this way, when the diaphragm 23 moves towards the valve seat 21, the diaphragm 23 can be in sealing abutment with the valve seat 21, and the valve port 2101 is closed. When the diaphragm 23 moves away from the valve seat 21, the diaphragm 23 can abut against the stop protrusion 2422 and form line-face contact with the stop protrusion 2422, at which time the valve port 2101 is open. In other words, the angle between the limiting portion 242 and the main body portion 241 is less than 90 degrees, so that the end of the limiting portion 242 away from the main body portion 241 is inclined downward, and the lower edge of the end of the limiting portion 242 away from the main body portion 241 can form the edge of the stop protrusion 2422 to form line-face contact with the diaphragm 23, which can effectively reduce the contact area between the diaphragm 23 and the limiting support 24, thereby reducing the tension formed between the limiting support 24 and the diaphragm 23. In this way, the diaphragm 23 needs to overcome less resistance when recovering to reseal the valve port 2101, greatly reducing the difficulty of recovery of the diaphragm 23. On the other hand, since the recovery resistance is reduced, the magnetic force does not need to be increased by increasing the volume of the magnet 22, thereby not only reducing the manufacturing cost, but also reducing the influence of the increased volume on the flow of refrigerant. At the same time, in this way, the magnetic force to be overcome when opening the valve is reduced, and the one-way valve 100 is also simpler to open.

[0077] Since the diaphragm 23 and the stop protrusion 2422 are in linear cooperation, it will affect the flow of refrigerant along the axial direction. To facilitate the smooth flow of refrigerant, the flow port 2402, which is arranged on the side of the limiting support 24 and communicates with the flow cavity 2401, can effectively solve this problem.

[0078] In one embodiment, as shown in FIG. 6, the main body portion 241 includes a columnar segment 2411 and an arcuate segment 2412, one end of the arcuate segment 2412 is connected to the columnar segment 2411, and the other end is connected to the limiting portion 242. The limiting portion 242 is provided with a through hole 2403 that communicates with the flow cavity 2401.

[0079] It can be understood that the columnar segment 2411 is used for limiting and guiding cooperation with the diaphragm 23, the arcuate segment 2412 is used for smooth transition between the columnar segment 2411 and the limiting portion 242, reduces stress concentration, avoids turbulent flow of refrigerant, and improves the flow performance of refrigerant. In addition, the through hole 2403 arranged on the limiting portion 242 is beneficial to reduce the forming difficulty of the limiting portion 242.

[0080] Specifically, the flow port 2402 is arranged on the columnar segment 2411.

[0081] Further, in an embodiment, the limiting portion 242, the columnar segment 2411 and the arcuate segment 2412 are integrally formed by bending. That is, the arcuate segment 2412 and the limiting portion 242 can be formed by stamping and bending from an end of the valve seat 21 through the columnar segment 2411, so as to improve the forming efficiency of the limiting bracket 24 and reduce the processing procedures.

[0082] In an embodiment, as shown in FIG. 6, along the axial direction of the limiting bracket 24, the vertical distance from the stop protrusion 2422 to the junction of the limiting portion 242 and the arcuate segment 2412 is defined as H1, and the vertical distance from the junction of the limiting portion 242 and the arcuate segment 2412 to the junction of the arcuate segment 2412 and the columnar segment 2411 is defined as h1, and H1>h1 is satisfied.

[0083] Generally, in the structure of the conventional limiting bracket 24 cooperating with the diaphragm 23 through a stop plane, when the diaphragm 23 moves, the diaphragm 23 is guided by the columnar segment 2411, and when the diaphragm 23 moves to the position cooperating with the stop plane, the periphery of the diaphragm 23 is prone to interfere with the inner wall of the arcuate segment 2412, and there is a risk of the diaphragm 23 being stuck. The common solution is to locally machine an avoiding groove on the arcuate segment 2412, so as to form a gap between the stop plane and the arcuate segment 2412 through the avoiding groove, thereby avoiding the diaphragm 23 being stuck. In the present embodiment, by setting H1>h1, when the diaphragm 23 linearly cooperates with the stop protrusion 2422, the diaphragm 23 does not interfere with the arcuate segment 2412, thereby effectively avoiding the diaphragm 23 being stuck, and without the need of machining the avoiding groove and the like, the processing procedures can be further reduced and the processing efficiency can be improved.

[0084] In an embodiment, the main body portion 241 includes the columnar segment 2411, the arcuate segment 2412 and a blocking segment (not shown in the figure), the blocking segment blocks one end of the flow passage 2401, and the periphery of the blocking segment is connected to the arcuate segment 2412 and connected to the columnar segment 2411 through the arcuate segment 2412. The limiting portion 242 protrudes from and is connected to the end face of the blocking segment close to the flow passage 2401.

[0085] That is, in the present embodiment, the blocking segment can block the flow of the refrigerant along the axial direction, and thus when part of the refrigerant enters the chamber between the diaphragm 23 and the blocking segment in the flow passage 2401 from the gap between the diaphragm 23 and the columnar segment 2411, this part of the refrigerant can generate a certain counterforce on the diaphragm 23 moving towards the blocking segment and the limiting portion 242, thereby slowing down the moving speed of the diaphragm 23, so as to achieve the noise reduction effect.

[0086] Specifically, the blocking segment can be provided in a disc-shaped structure, and the limiting portion 242 can be fixedly connected to the blocking segment through clamping or welding.

[0087] Further, in an embodiment, along the axial direction of the limiting support 24, the vertical distance H2 from the connecting position of the stop protrusion 2422 to the limiting portion 242 and the blocking section, and the vertical distance h2 from the connecting position of the blocking section and the arc-shaped section 2412 to the connecting position of the arc-shaped section 2412 and the columnar section 2411 satisfy H2>h2.

[0088] In this way, by setting H2>h2, when the diaphragm 23 is linearly matched with the stop protrusion 2422, interference with the arc-shaped section 2412 is avoided, thereby effectively avoiding the diaphragm 23 from being stuck, and without the need for processing a relief groove or the like, the processing procedure can be further reduced, and the processing efficiency is improved.

[0089] Referring to FIGS. 8 and 9, in order to avoid excessive movement of the diaphragm, in an embodiment, a protruding portion 27 can be formed on the inner wall of the valve body 10 in a direction close to the axis, the diaphragm 23 is arranged between the valve seat 21 and the protruding portion 27, and when the diaphragm 23 moves away from the valve seat 21, the diaphragm 23 can be stopped at the protruding portion 27. In this way, the movement of the diaphragm 23 can also be limited.

[0090] Specifically, the protruding portion 27 can be a plurality of protruding block structures arranged at intervals in the circumferential direction of the valve body 10. Alternatively, the protruding portion 27 can be a protruding ring structure extending in the circumferential direction of the valve body 10. In this way, the structure of the protruding portion 27 is simple and easy to process.

[0091] Further, in an embodiment, a flow hole is formed on the diaphragm 23, 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 position of the projection 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 protruding portion 27, the refrigerant can smoothly flow through the flow hole on the diaphragm 23, and when the diaphragm 23 is matched with the valve seat 21, the flow hole and the valve port 2101 do not interfere with each other, thereby ensuring the sealing effect of the diaphragm 23 on the valve port 2101. It can be understood that the axial direction of the diaphragm is also the axial direction of the valve body 10.

[0092] In order to filter impurities in the refrigerant, in an embodiment, the valve seat assembly 20 further comprises a filter screen 25, which is arranged at one end of the valve seat 21 away from the diaphragm 23 and connected with the valve seat 21. In this way, the impurities in the refrigerant can be filtered.

[0093] Further, in the related art, the filter screen 25 is usually fixed with the valve seat 21 by welding, which results in the entire valve seat assembly 20 being scrapped if one of them is damaged or does not meet the performance requirements, thereby greatly increasing the cost.

[0094] Therefore, in order to further reduce the cost of the one-way valve 100, in an embodiment, the valve seat assembly 20 further comprises a fixing ring 26 sleeved on one end of the valve seat 21 and connected with the valve seat 21. One end of the filter screen 25 is clamped between the fixing ring 26 and the valve seat 21. In this way, not only the firm installation of the filter screen 25 can be achieved, but also the disassembly of the filter screen 25 can be achieved, thereby facilitating the replacement of single components and greatly reducing the production cost.

[0095] In an embodiment, as shown in FIG. 1, the valve body 10 comprises a first valve pipe 11 and a second valve pipe 12, and the 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 with the end of the first valve pipe 11, and the other end is attached to and connected with the end of the second valve pipe 12. In this way, the installation of the valve seat 21 is simpler, and the machining and forming efficiency of the whole one-way valve 100 can be improved.

[0096] Specifically, the first valve pipe 11, the second valve pipe 12 and the valve seat 21 can be fixed by laser welding. At the same time, in order to avoid shaking between them during welding, the first valve pipe 11 and the second valve pipe 12 can be pre-fixed with the valve seat 21 by interference, thereby improving the reliability of welding.

[0097] In other embodiments, the valve body 10 can also be provided as an integrated structure, at this time, the valve body 10 can be connected with the valve seat 21 by necking or the like, thereby realizing the fixed installation of the valve seat 21 in the valve body 10.

[0098] It can be understood that before the valve seat 21 and the valve body 10 are welded, the valve seat 21, the diaphragm 23, the limiting support 24, the magnet 22, the filter screen 25 and the fixing ring 26 can be combined to form the valve seat assembly 20 before welding, and the assembly is simpler.

[0099] The application also provides a machining method of the one-way valve 100, which is used for machining the one-way valve 100 of any one of the above embodiments, and the machining method comprises steps S1, S2, S3 and S4.

[0100] S1, a valve port 2101 and an annular clamping groove 2102 are machined on the valve seat 21, and an avoiding groove 2103 is cut on one side wall of the annular clamping groove 2102, wherein the avoiding groove 2103 can be arranged on the side of the valve seat 21 away from the diaphragm 23;

[0101] S2, the end of the magnet 22 is inserted into the annular clamping groove 2102 through the avoiding groove 2103, and is rotated by a preset angle, so that the end of the magnet 22 deviates from the avoiding groove 2103;

[0102] S3, the stop point 2103a on the avoiding groove 2103 is riveted and pressed, so that the stop point 2103a is deformed towards the inside of the annular clamping groove 2102.

[0103] S4, connecting the valve seat 21 to the valve body 10.

[0104] In an embodiment, the step S1 further comprises: cutting a limiting slot 2104 on the annular clamping slot 2102.

[0105] Further, in an embodiment, the step S3 further comprises: riveting the limiting point 2104a on the limiting slot 2104 to make the limiting point 2104a deform towards the inside of the annular clamping slot 2102. In this way, the limiting effect of the magnet 22 is further ensured.

[0106] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they shall be considered within the scope of the present disclosure.

[0107] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A one-way valve, comprising a valve body and a valve seat assembly mounted within the valve body, characterized in that, The valve seat assembly includes a valve seat and a magnet. The valve seat has a valve port that extends through the valve seat axially and an annular groove that communicates with the valve port. The annular groove has two sidewalls distributed along the axial direction of the valve seat, and one of the sidewalls has a clearance groove that extends through itself along the axial direction of the valve seat. The end of the magnet can be installed into the annular slot through the clearance groove, and the magnet can rotate relative to the valve seat by a preset angle along the circumference of the valve seat in the annular slot so that the two side walls of the annular slot form an axial stop for the magnet. After the magnet is installed into the annular slot, the clearance groove forms a stop. When the magnet rotates circumferentially within the annular slot, it forms a stop with the stop to restrict the end of the magnet from rotating into the clearance groove and prevent the magnet from rotating to the position of the clearance groove and coming out of the valve seat.

2. The one-way valve according to claim 1, wherein, The side portion of the opening where the clearance groove communicates with the valve port is defined as a stop point, wherein each stop point is capable of deforming toward the interior of the annular groove in response to an external force, thereby forming the stop portion.

3. The one-way valve according to claim 2, wherein, The number of the clearance grooves is two, and the two clearance grooves are arranged opposite each other along the radial direction of the valve seat; Wherein, any two adjacent stop points along the circumference of the valve seat form the stop portion, or all the stop points form the stop portion.

4. The check valve according to any one of claims 1-3, wherein, The side wall of the annular groove is also provided with a limiting groove. The limiting groove and the clearance groove are spaced apart along the circumference of the valve seat. The side of the opening where the limiting groove communicates with the valve port is defined as the limiting point. Each limiting point can deform toward the inside of the annular groove in response to external force to form a limiting part. The limiting part can stop the magnet in the circumferential direction of the valve seat to prevent the end of the magnet from rotating in the circumferential direction of the valve seat.

5. The check valve according to claim 4, wherein, The shortest distance between the limiting part and the stop part is equal to the width of the magnet; and / or, the number of the limiting grooves is two, and the two limiting grooves are arranged opposite each other along the radial direction of the valve seat.

6. The one-way valve according to claim 4, wherein, The stop portion is a riveted and formed structure; and / or, the limiting portion is a riveted and formed structure.

7. The one-way valve according to claim 1, wherein, The valve seat assembly further includes a diaphragm and a limiting bracket, one end of which is connected to the valve seat and the other end of which forms a limiting portion; The diaphragm is movably installed within the limiting bracket, and the diaphragm and the magnet are magnetically coupled, and can be sealed at the valve port under the attraction of the magnet; When the diaphragm moves away from the valve seat under the action of an external force, the diaphragm can stop at the limiting part and make line-to-surface or surface-to-surface contact with the limiting part.

8. The check valve according to claim 7, wherein, The limiting bracket includes a main body and a limiting part. One end of the main body is connected to the valve seat, and the other end is used to connect to the limiting part. The limiting bracket and the valve seat form a flow cavity. The diaphragm is movably installed in the flow cavity to open or close the valve port. The limiting part is set at an angle to the main body part, and the end of the limiting part away from the main body part extends into the flow cavity and forms a stop plane or a stop protrusion. When the diaphragm moves toward the valve seat, the diaphragm can seal against the valve seat, and the valve port is closed; When the diaphragm moves away from the valve seat, the diaphragm can abut against the stop plane and form a surface-to-surface contact with the stop plane, or the diaphragm can abut against the stop protrusion and form a line-to-surface contact with the stop protrusion, and the valve port opens.

9. The one-way valve according to claim 8, wherein, The main body includes a columnar segment and an arc-shaped segment, with one end of the arc-shaped segment connected to the columnar segment and the other end connected to the limiting part; The limiting part has a through hole that connects to the flow cavity.

10. [Correction 22.07.2025 according to Rule 91] The one-way valve according to claim 9, wherein, The limiting part, the columnar segment, and the arc-shaped segment are integrally bent and formed structures.

11. [Corrected according to Rule 91, July 22, 2025] 11. The one-way valve according to claim 9, wherein, Along the axial direction of the limiting bracket, the vertical distance from the stop protrusion to the connection point of the limiting part and the arc-shaped segment is defined as H1, and the vertical distance from the connection point of the limiting part and the arc-shaped segment to the connection point of the arc-shaped segment and the columnar segment is defined as h1, satisfying that H1 > h1.

12. The check valve according to claim 8, wherein, The main body includes a columnar section, an arc-shaped section, and a blocking section. The blocking section blocks one end of the flow cavity, and the periphery of the blocking section is connected to the arc-shaped section and the columnar section is connected through the arc-shaped section. The limiting part protrudes and is connected to the end face of the blocking section near the flow cavity.

13. The one-way valve according to claim 12, wherein, Along the axial direction of the limiting bracket, the vertical distance from the stop protrusion to the connection between the limiting part and the blocking section is defined as H2, and the vertical distance from the connection between the blocking section and the arc-shaped section to the connection between the arc-shaped section and the columnar section is defined as h2, satisfying that H2 > h2.

14. The check valve according to claim 7, wherein, The one-way valve also includes a filter screen, which is located at the end of the valve seat away from the diaphragm and connected to the valve seat.

15. The check valve according to claim 14, wherein, The one-way valve also includes a retaining ring, which is sleeved on one end of the valve seat and connected to the valve seat; One end of the filter screen is sandwiched between the fixing ring and the valve seat.

16. The one-way valve according to claim 1, wherein, The valve seat assembly further includes a diaphragm, and the inner wall of the valve body protrudes in a direction close to the axis to form a protrusion. The diaphragm is disposed between the valve seat and the protrusion, and when the diaphragm moves in a direction away from the valve seat, the diaphragm can stop against the protrusion.

17. The check valve according to claim 16, wherein, The protrusion includes a plurality of protrusion structures spaced axially along the inner wall of the valve body; or, the protrusion is a convex ring structure extending circumferentially along the inner wall of the valve body.

18. The check valve according to claim 16, wherein, The diaphragm has an overflow hole. Along the axial direction of the diaphragm, the projection of the valve port on the diaphragm does not overlap with the overflow hole, and the projection of the valve port on the diaphragm is located inside the overflow hole on the diaphragm.

19. The one-way valve according to claim 1, wherein, The valve body includes a first valve tube and a second valve tube. A connecting boss protrudes from the outer side wall of the valve seat. 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. Alternatively, the valve body may be a one-piece structure.

20. A method for processing a one-way valve, characterized in that, The processing method for manufacturing the check valve as described in any one of claims 1-19 includes the following steps: A valve port and an annular groove are machined on the valve seat, and a clearance groove is cut on one side wall of the annular groove. Insert the end of the magnet into the annular slot through the clearance groove, and rotate it at a preset angle; The stop point on the clearance groove is riveted to cause the stop point to deform toward the inside of the annular groove; The valve seat is connected to the valve body.

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