One-way valve

Abstract

A one-way valve, comprising a valve tube, a valve seat, an elastic sealing member and a diaphragm, wherein the valve seat is mounted in the valve tube, and is provided with a valve port, which penetrates two ends of the valve seat; the elastic sealing member is mounted on an end face of one side of the valve seat, and extends in the circumferential direction of the valve port, and at least part of the elastic sealing member is configured to protrude from the end face of the valve seat; and the diaphragm is movably mounted in the valve tube, and the diaphragm can be connected to the elastic sealing member in a pressing manner so as to close the valve port, or the diaphragm can disengage from the elastic sealing member so as to open the valve port.

Description

One-way valve

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202410172411.2, filed on February 6, 2024, with the invention name “One-way Valve”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of valve technology, and in particular to a one-way valve. Background Art

[0004] One-way valves are an important component in refrigeration equipment, and diaphragm one-way valves are one of the most common one-way valves. A diaphragm one-way valve usually includes a valve tube, a valve seat, and a diaphragm. The valve seat is fixedly installed in the valve tube, and a valve port for the circulation of refrigerant is opened on the valve seat. The diaphragm is movably installed in the valve tube, and the diaphragm can be covered on the valve port to close the valve port. When the valve port is closed, the diaphragm is directly attached to the end wall near the valve port, and the diaphragm and the end wall near the valve port cannot be absolutely flat, so it is difficult to achieve complete fit. In other words, there is easily a gap between the diaphragm and the end wall near the valve port, which causes the valve port to be loosely closed and the sealing performance is poor. Summary of the Invention

[0005] Based on this, the present application provides a one-way valve.

[0006] A one-way valve includes a valve tube, a valve seat, an elastic seal and a diaphragm. The valve seat is installed in the valve tube, and a valve port is formed on the valve seat and passes through both ends of the valve seat. The elastic seal is installed on the end surface of one end of the valve seat and is arranged around the valve port, and at least part of the elastic seal protrudes from the end surface of the valve seat. The diaphragm is movably installed in the valve tube, and the diaphragm can be pressed against the elastic seal and close the valve port; alternatively, the diaphragm can be detached from the elastic seal and open the valve port.

[0007] In one embodiment, a mounting groove is provided on an end surface of the valve seat near one end of the diaphragm, the mounting groove surrounds the valve port, and the mounting groove has an opening arranged toward the diaphragm, the elastic seal is installed in the mounting groove, and at least a portion of the elastic seal is exposed through the opening.

[0008] In one embodiment, the assembly slot has a first side wall and a second side wall that are oppositely disposed, and along a direction from the bottom wall of the assembly slot to the opening, at least one of the first side wall and the second side wall extends toward a direction approaching the other.

[0009] In one embodiment, the assembly groove has a first side wall and a second side wall arranged opposite to each other, and along the direction from the bottom wall of the assembly groove to the opening, the first side wall extends toward the direction close to the second side wall, and the second side wall extends toward the direction away from the first side wall.

[0010] In one embodiment, the second side wall includes a first section and a second section, the first section is arranged near the bottom wall of the assembly groove and is used to cooperate with the first side wall to clamp the elastic seal, the second section is arranged at an angle to the first section, and the second section extends in a direction away from the first side wall.

[0011] In one embodiment, when the diaphragm is pressed against the elastic seal and the valve port is closed, the gap between the diaphragm and the end surface of the valve seat is defined as h, the distance between the diaphragm and the bottom wall of the assembly groove is defined as H, and 0.1H≤h≤0.3H.

[0012] In one embodiment, the cross-sectional width of the elastic sealing member increases along a direction from the bottom wall of the assembly groove to the diaphragm.

[0013] In one embodiment, the one-way valve further includes a magnet fixedly connected to the valve seat. The diaphragm is magnetic. The magnet is used to absorb the diaphragm and move the diaphragm toward the valve port to close the valve port.

[0014] In one embodiment, the one-way valve further includes a limit bracket mounted within the valve tube. The limit bracket has a limit surface formed thereon, the limit surface being spaced apart from the elastic seal. The diaphragm is movably mounted between the limit surface and the elastic seal. When the diaphragm is separated from the elastic seal, the diaphragm is capable of stopping at the limit surface.

[0015] In one embodiment, the position-limiting bracket includes a main body and at least three support columns distributed circumferentially along the main body. The main body defines a through-hole that communicates with the valve port. One end of each support column is connected to the main body, while the other end extends toward and abuts the valve seat. Each support column defines a sub-surface in the middle, and at least three sub-surfaces constitute the position-limiting surface.

[0016] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. 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] FIG1 is a cross-sectional view of the one-way valve provided in the present application along the axis.

[0019] FIG2 is an enlarged schematic diagram of the one-way valve shown in FIG1 at point A. FIG.

[0020] FIG3 is an enlarged schematic diagram of a one-way valve at point A according to another embodiment of the present application.

[0021] FIG4 is an enlarged schematic diagram of a one-way valve at point A according to another embodiment of the present application.

[0022] FIG5 is an enlarged schematic diagram of a one-way valve at point A according to another embodiment of the present application.

[0023] FIG6 is a schematic structural diagram of the position limiting bracket provided in this application.

[0024] FIG7 is a schematic structural diagram of an elastic seal according to an embodiment of the present application.

[0025] FIG8 is a schematic structural diagram of an elastic seal according to another embodiment of the present application.

[0026] FIG9 is a schematic structural diagram of an elastic sealing member according to another embodiment of the present application.

[0027] Figure numerals: 10, valve tube; 20, valve seat; 21, valve port; 22, assembly groove; 221, opening; 222, first side wall; 223, second side wall; 223a, first section; 223b, second section; 30, elastic seal; 40, diaphragm; 50, magnet; 60, limiting bracket; 61, limiting surface; 62, main body; 621, through hole; 63, support column; 631, sub-surface; 70, filter screen. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] 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 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.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as 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 of the relevant listed items.

[0033] Referring to Figures 1 and 2 , the present application provides a one-way valve, which includes a valve tube 10, a valve seat 20, an elastic seal 30, and a diaphragm 40. The valve seat 20 is mounted within the valve tube 10. The valve seat 20 defines a valve port 21 extending through both ends of the valve seat 20. The elastic seal 30 is mounted on an end surface of one end of the valve seat 20 and surrounds the valve port 21. At least a portion of the elastic seal 30 protrudes from the end surface of the valve seat 20. The diaphragm 40 is movably mounted within the valve tube 10 and can be crimped onto the elastic seal 30 to close the valve port 21. Alternatively, the diaphragm 40 can be detached from the elastic seal 30 to open the valve port 21. By setting the elastic seal 30, when the diaphragm 40 is pressed against the elastic seal 30, the diaphragm 40 covers the valve port 21, and the diaphragm 40 squeezes the elastic seal 30 to cause the elastic seal 30 to undergo elastic deformation. The elastic seal 30 has a tendency to rebound due to being squeezed, so that the two opposite ends of the elastic seal 30 along the axial direction can respectively adhere to the valve seat 20 and the diaphragm 40, thereby achieving a soft seal between the diaphragm 40 and the valve seat 20, and the refrigerant cannot flow from between the diaphragm 40 and the valve seat 20 to the valve port 21, that is, the sealing performance of the one-way valve when closing the valve is improved.

[0034] The elastic sealing member 30 is made of rubber, nylon, polytetrafluoroethylene or other soft plastics.

[0035] Referring to Figures 2 to 5 , a mounting groove 22 is defined on the end surface of the valve seat 20 near the diaphragm 40. The mounting groove 22 surrounds the valve port 21 and has an opening 221 facing the diaphragm 40. The elastic seal 30 is mounted within the mounting groove 22, with at least a portion of the elastic seal 30 exposed through the opening 221. This facilitates secure mounting of the elastic seal 30 on the valve seat 20.

[0036] There are two ways to assemble the elastic seal 30 and the valve seat 20. One of them is: first, the assembly groove 22 is formed on the valve seat 20, and then the elastic seal 30 is installed in the assembly groove 22; the other is: first, the assembly groove 22 is formed on the valve seat 20, and then rubber, nylon, polytetrafluoroethylene or other soft plastics are injection molded in the assembly groove 22 to form the elastic seal 30.

[0037] The assembly groove 22 has a first side wall 222 and a second side wall 223 that are disposed opposite each other. At least one of the first side wall 222 and the second side wall 223 extends toward the other along the direction from the bottom wall of the assembly groove 22 to the opening 221. Thus, the first side wall 222 or the second side wall 223 can limit the elastic seal 30 at the location of the opening 221, thereby preventing the elastic seal 30 from falling out of the opening 221.

[0038] For example, in one embodiment, as shown in FIG3 , along the direction from the bottom wall of the assembly groove 22 to the opening 221, the first side wall 222 and the second side wall 223 extend toward each other. The cross-sectional shape of the first side wall 222 and the second side wall 223 is an inclined plane in FIG3 , and the assembly groove 22 presents an inwardly converging structure from the bottom wall to the opening, which is more conducive to forming a limited installation for the elastic seal 30. Of course, the cross-sectional shape of the first side wall 222 and the second side wall 223 is not limited to a plane and will not be elaborated in detail here.

[0039] In another embodiment, as shown in FIG4 , along the direction from the bottom wall of the assembly groove 22 to the opening 221, the first side wall 222 extends toward the second side wall 223, while the second side wall 223 extends away from the first side wall 222. In this manner, the first side wall 222 is used to limit the elastic seal 30 at the location of the opening 221. Furthermore, by extending the second side wall 223 away from the first side wall 222 along the direction from the bottom wall of the assembly groove 22 to the opening 221, a sufficiently large opening 221 can be formed between the second side wall 223 and the first side wall 222, thereby facilitating the installation of the elastic seal 30 into the assembly groove 22.

[0040] Specifically, the second side wall 223 includes a first section 223a and a second section 223b. The first section 223a is arranged close to the bottom wall of the assembly groove 22 and is used to cooperate with the first side wall 222 to clamp the elastic seal 30. The second section 223b is arranged at an angle to the first section 223a, and the second section 223b extends in a direction away from the first side wall 222.

[0041] Furthermore, the second section 223 b is configured as a plane, so that the second section 223 b can play a guiding role to guide the elastic sealing member 30 to be installed into the assembly groove 22 along the surface of the second section 223 b.

[0042] The surface shape of the elastic seal 30 is adapted to the shape of the first side wall 222 and the shape of the second side wall 223, so that the elastic seal 30 is more closely aligned with the wall surface of the assembly groove 22. For example, as shown in Figures 4 and 7, the surface of the elastic seal 30 is configured as an arc surface, and both the first side wall 222 and the second side wall 223 are configured as arc surfaces. Alternatively, as shown in Figures 2, 3, and 7, the surface of the elastic seal 30 is configured as a plane, and both the first side wall 222 and the second side wall 223 are configured as planes.

[0043] Please refer to Figures 2 to 5. When the diaphragm 40 is pressed against the elastic seal 30 and the valve port 21 is closed, the gap between the diaphragm 40 and the end surface of the valve seat 20 is defined as h, and the distance between the diaphragm 40 and the bottom wall of the assembly groove 22 is defined as H, and 0.1H≤h≤0.3H.

[0044] It can be understood that a larger ratio of h to H indicates that when the valve port 21 is closed, the height of the elastic seal 30 extending from the opening 221 is greater, and the elastic seal 30 is more easily axially compressed by the diaphragm 40. However, if the ratio of h to H is too large, less of the elastic seal 30 is located in the assembly groove 22, which may result in a less secure assembly between the elastic seal 30 and the valve seat 20. A smaller ratio of h to H indicates that when the valve port 21 is closed, the height of the elastic seal 30 extending from the opening 221 is less, making it difficult to ensure sufficient axial compression of the elastic seal 30. By setting 0.1H ≤ h ≤ 0.3H, a secure connection between the elastic seal 30 and the valve seat 20 is maintained, while sufficient axial compression of the elastic seal 30 is ensured, thereby facilitating a sealed fit between the diaphragm 40 and the valve seat 20. For example, the value of h / H can be 0.1, 0.2, 0.25, or 0.3, etc., and the specific setting can be based on actual needs and is not listed here.

[0045] As shown in Figures 2 and 5 , the cross-sectional width of the elastic seal 30 increases along the direction from the bottom wall of the assembly groove 22 to the diaphragm 40. In other words, the cross-sectional width of the elastic seal 30 increases as it approaches the diaphragm 40. This increases the contact area between the elastic seal 30 and the diaphragm 40, thereby ensuring a sealed connection between the elastic seal 30 and the diaphragm 40.

[0046] For example, in one embodiment, as shown in Figures 2 and 8 , the cross-sectional shape of the elastic sealing member 30 is T-shaped. In another embodiment, as shown in Figures 5 and 9 , the cross-sectional shape of the elastic sealing member 30 is L-shaped.

[0047] Of course, in other embodiments, the cross-sectional shape of the elastic sealing member 30 may also be O-shaped, Y-shaped, rectangular, or D-shaped.

[0048] As shown in FIG1 , the one-way valve further includes a magnet 50 , which is fixedly connected to the valve seat 20 . The diaphragm 40 is magnetic. The magnet 50 is used to absorb the diaphragm 40 and move the diaphragm 40 toward the valve port 21 to close the valve port 21 .

[0049] As shown in Figures 1 and 6, the one-way valve further includes a limiting bracket 60, which is mounted within the valve tube 10. A limiting surface 61 is formed on the limiting bracket 60, and the limiting surface 61 is spaced apart from the elastic seal 30. The diaphragm 40 is movably mounted between the limiting surface 61 and the elastic seal 30. When the diaphragm 40 is separated from the elastic seal 30, the diaphragm 40 can be stopped by the limiting surface 61. By providing the limiting bracket 60, the movement path of the diaphragm 40 is restricted between the elastic seal 30 and the limiting surface 61. Thus, when the diaphragm 40 is separated from the elastic seal 30 and the valve port 21 is opened, the diaphragm 40 will not fall out of the valve tube 10.

[0050] The limiting bracket 60 includes a main body 62 and at least three support columns 63 distributed circumferentially along the main body 62. A through hole 621 is provided on the main body 62, and the through hole 621 is connected to the valve port 21. One end of the support column 63 is connected to the main body 62, and the other end extends toward the direction close to the valve seat 20 and abuts against the valve seat 20. A sub-surface 631 is provided in the middle of each support column 63, and at least three sub-surfaces 631 constitute the limiting surface 61. When the valve port 21 is opened, the refrigerant flowing in from one end of the valve tube 10 continues to flow through the through hole 621 after flowing through the valve port 21, and then flows to the other end of the valve tube 10. In this embodiment, the limiting surface 61 is formed by multiple sub-surfaces 631 on multiple support columns 63, which not only can firmly support the diaphragm 40, but also helps save material and reduce the weight of the limiting bracket 60.

[0051] The number of the support columns 63 can be three, four, or five, etc., which can be set according to actual conditions and are not listed here one by one.

[0052] The cross-sectional shape of the support column 63 can be a triangle, a quadrilateral, a pentagon or other polygons. It can also be a circle, a D-shape or other special-shaped structures.

[0053] As shown in FIG. 1 , a filter screen 70 is installed on the side of the valve port 21 facing away from the diaphragm 40 . The filter screen 70 is used to filter impurities in the refrigerant flowing through the valve tube 10 .

[0054] The following describes the working principle of the one-way flow check valve: In the closed state, magnet 50 attracts diaphragm 40 toward valve port 21. Under the action of the attraction force, diaphragm 40 presses against elastic seal 30, closing valve port 21. When refrigerant flows toward diaphragm 40 from the end with limit bracket 60, diaphragm 40 acts as a flow blocker, preventing refrigerant from flowing into valve port 21. When refrigerant flows toward diaphragm 40 from the end of valve seat 20 facing away from diaphragm 40, and the pressure exerted by the refrigerant on diaphragm 40 is greater than the attraction force between magnet 50 and diaphragm 40, the refrigerant pushes diaphragm 40 toward limit bracket 60, causing diaphragm 40 to stop at limit surface 61, opening valve port 21.

[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0056] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A one-way valve, characterized in that: The one-way valve includes a valve tube, a valve seat, an elastic sealing member, and a diaphragm. The valve seat is installed in the valve tube. The valve seat is provided with a valve port that passes through both ends of the valve seat. The elastic sealing member is installed on an end surface of one end of the valve seat and is arranged around the valve port. At least a portion of the elastic sealing member protrudes from the end surface of the valve seat. The diaphragm is movably installed in the valve tube, and the diaphragm can be pressed against the elastic sealing member to close the valve port; or the diaphragm can be separated from the elastic sealing member to open the valve port.

2. The one-way valve according to claim 1, wherein: An assembly groove is provided on the end surface of the valve seat close to one end of the diaphragm. The assembly groove is arranged around the valve port and has an opening arranged toward the diaphragm. The elastic seal is installed in the assembly groove, and at least a portion of the elastic seal is exposed through the opening.

3. The one-way valve according to claim 2, wherein: The assembly groove has a first side wall and a second side wall that are opposite to each other. Along a direction from the bottom wall of the assembly groove to the opening, at least one of the first side wall and the second side wall extends toward the other.

4. The one-way valve according to claim 2, wherein: The assembly groove has a first side wall and a second side wall arranged opposite to each other. Along the direction from the bottom wall of the assembly groove to the opening, the first side wall extends toward the second side wall, and the second side wall extends toward the direction away from the first side wall.

5. The one-way valve according to claim 4, wherein: The second side wall includes a first section and a second section. The first section is arranged close to the bottom wall of the assembly groove and is used to cooperate with the first side wall to clamp the elastic seal. The second section is arranged at an angle to the first section, and the second section extends in a direction away from the first side wall.

6. The one-way valve according to claim 2, wherein: When the diaphragm is pressed against the elastic seal and closes the valve port, the gap between the diaphragm and the end surface of the valve seat is defined as h, the distance between the diaphragm and the bottom wall of the assembly groove is defined as H, and 0.1H≤h≤0.3H.

7. The one-way valve according to claim 2, wherein: Along the direction from the bottom wall of the assembly groove to the diaphragm, the cross-sectional width of the elastic sealing member tends to increase.

8. The one-way valve according to claim 1, wherein The one-way valve further includes a magnet, which is fixedly connected to the valve seat. The diaphragm is magnetic and is used to absorb the diaphragm and move the diaphragm toward the valve port to close the valve port.

9. The one-way valve according to claim 1, wherein: The one-way valve also includes a limit bracket, which is installed in the valve tube. A limit surface is formed on the limit bracket. The limit surface is spaced apart from the elastic seal. The diaphragm is movably installed between the limit surface and the elastic seal. When the diaphragm is separated from the elastic seal, the diaphragm can be stopped at the limit surface.

10. The one-way valve according to claim 9, wherein: The limiting bracket includes a main body and at least three support columns distributed along the circumference of the main body, and a through hole is opened on the main body, and the through hole is connected to the valve port; One end of the support column is connected to the main body, and the other end extends toward the valve seat and abuts against the valve seat. A sub-surface is provided in the middle of each support column, and at least three sub-surfaces constitute the limiting surface.

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