One-way valve

Abstract

The one-way valve comprises a valve pipe, a valve seat, an elastic sealing piece and a membrane, the valve seat is installed in the valve pipe, a valve port penetrating through the two ends of the valve seat is formed in the valve seat, the elastic sealing piece is installed on the 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 piece protrudes out of the end face of the valve seat. The diaphragm is movably arranged in the valve pipe, and the diaphragm can be connected to the elastic sealing piece in a pressing manner and close the valve port; or, the diaphragm can be separated from the elastic sealing piece, and the valve port is opened. According to the one-way valve, the elastic sealing piece is arranged, so that soft sealing is achieved between the diaphragm and the valve seat, and the sealing performance of the one-way valve is improved when the one-way valve is closed.

Description

Technical Field

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

[0002] 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

[0003] Based on this, it is necessary to provide a one-way valve to solve the problem that the valve port is not tightly closed and has poor sealing.

[0004] A one-way valve comprises a valve tube, a valve seat, an elastic seal, and a diaphragm. The valve seat is mounted within the valve tube and defines a valve port extending through both ends of the valve seat. The elastic seal is mounted on the end surface of one end of the valve seat and surrounds the valve port, with at least a portion of the elastic seal protruding from the end surface of the valve seat. The diaphragm is movably mounted within the valve tube and can be pressed against the elastic seal to close the valve port. Alternatively, the diaphragm can be detached from the elastic seal to open the valve port.

[0005] In one embodiment, a mounting groove is defined on the end surface of the valve seat near the diaphragm. The mounting groove surrounds the valve opening and has an opening facing the diaphragm. The elastic seal is mounted within the mounting groove, with at least a portion of the elastic seal exposed through the opening. It will be appreciated that this arrangement, through the provision of the mounting groove, facilitates secure mounting of the elastic seal on the valve seat.

[0006] In one embodiment, the mounting groove includes a first side wall and a second side wall disposed opposite each other, with at least one of the first side wall and the second side wall extending toward the other along a direction from the bottom wall of the mounting groove to the opening. It will be appreciated that, with this arrangement, the first side wall or the second side wall can limit the elastic seal at the opening, thereby preventing the elastic seal from detaching from the opening.

[0007] In one embodiment, the mounting groove has a first sidewall and a second sidewall disposed opposite each other. Along the direction from the bottom wall of the mounting groove to the opening, the first sidewall extends toward the second sidewall, while the second sidewall extends away from the first sidewall. It will be understood that, with this arrangement, the first sidewall serves to limit the elastic seal at the opening. Furthermore, by extending the second sidewall away from the first sidewall along the direction from the bottom wall of the mounting groove to the opening, a sufficiently large opening can be formed between the second sidewall and the first sidewall to facilitate installation of the elastic seal into the mounting groove.

[0008] 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.

[0009] In one embodiment, when the diaphragm is crimped against the elastic seal and the valve port is closed, the gap between the diaphragm and the end surface of the valve seat is h, and the spacing between the diaphragm and the bottom wall of the assembly groove is H, and 0.1H ≤ h ≤ 0.3H. It will be appreciated that this arrangement ensures a secure connection between the elastic seal and the valve seat and sufficient axial compression of the elastic seal, thereby facilitating a sealed fit between the diaphragm and the valve seat.

[0010] In one embodiment, the cross-sectional width of the elastic seal increases along the direction from the bottom wall of the assembly groove to the diaphragm. It is understood that this configuration can increase the contact area between the elastic seal and the diaphragm, thereby facilitating a sealed connection between the elastic seal and the diaphragm.

[0011] 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.

[0012] In one embodiment, the one-way valve further includes a stop bracket mounted within the valve tube. A stop surface is formed on the stop bracket and spaced apart from the elastic seal. The diaphragm is movably mounted between the stop surface and the elastic seal. When the diaphragm is released from the elastic seal, it is stopped by the stop surface. It will be understood that this arrangement restricts the diaphragm's movement path to between the elastic seal and the stop surface. When the diaphragm is released from the elastic seal and the valve opening is opened, the diaphragm will not fall out of the valve tube.

[0013] 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 is provided with a through-hole that communicates with the valve port. One end of the support column is connected to the main body, and the other end extends toward and abuts the valve seat. Each support column has a sub-surface defined in the middle, and at least three sub-surfaces constitute the position-limiting surface. It will be appreciated that this arrangement, in which the position-limiting surface is formed by multiple sub-surfaces on multiple support columns, not only provides secure support for the diaphragm but also helps save material and reduce the weight of the position-limiting bracket.

[0014] Compared with the prior art, the one-way valve provided in the present application is provided with an elastic seal. When the diaphragm is pressed against the elastic seal, the diaphragm covers the valve port, and the diaphragm squeezes the elastic seal to cause the elastic seal to undergo elastic deformation. The elastic seal has a tendency to rebound due to being squeezed, so that the two opposite ends of the elastic seal along the axial direction can respectively adhere to the valve seat and the diaphragm, thereby achieving a soft seal between the diaphragm and the valve seat, and the refrigerant cannot flow from between the diaphragm and the valve seat to the valve port, that is, the sealing performance of the one-way valve when closing the valve is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 A cross-sectional view of the one-way valve provided in this application along the axis;

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of the one-way valve at position A is shown;

[0018] Figure 3 An enlarged schematic diagram of a one-way valve at point A according to another embodiment of the present application is provided;

[0019] Figure 4 An enlarged schematic diagram of a one-way valve at point A according to another embodiment of the present application is provided;

[0020] Figure 5 This application provides an enlarged schematic diagram of a one-way valve at point A according to another embodiment;

[0021] Figure 6 A schematic diagram of the structure of the limit bracket provided in this application;

[0022] Figure 7 A schematic structural diagram of an elastic sealing member according to an embodiment of the present application;

[0023] Figure 8 A schematic structural diagram of an elastic sealing member according to another embodiment of the present application;

[0024] Figure 9 This is a schematic structural diagram of an elastic seal according to another embodiment of the present application.

[0025] 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

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] See also Figures 1 to 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 installed in the valve tube 10 and defines a valve port 21 extending through both ends of the valve seat 20. The elastic seal 30 is installed on the 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 installed in the valve tube 10 and can be pressed against the elastic seal 30 to close the valve port 21. Alternatively, the diaphragm 40 can be separated 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.

[0032] The elastic sealing member 30 is made of rubber, nylon, polytetrafluoroethylene or other soft plastics.

[0033] See also Figures 2 to 5The valve seat 20 has an assembly groove 22 formed on its end surface near the diaphragm 40. The assembly groove 22 surrounds the valve port 21 and has an opening 221 facing the diaphragm 40. The elastic seal 30 is installed in the assembly groove 22, with at least a portion of the elastic seal 30 exposed through the opening 221. This facilitates the secure installation of the elastic seal 30 on the valve seat 20.

[0034] 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.

[0035] 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.

[0036] For example, in one embodiment, Figure 3 As shown, 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 in a direction close to each other, and the cross-sectional shape of the first side wall 222 and the second side wall 223 is Figure 3 The center is an inclined plane, 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 specifically expanded here.

[0037] In another embodiment, Figure 4 As shown, 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 way, 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 is 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.

[0038] 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.

[0039] 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.

[0040] 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 fits better with the wall surface of the assembly groove 22. Figure 4 and Figure 7 As shown, the surface of the elastic seal 30 is configured as an arc surface, and the first side wall 222 and the second side wall 223 are both configured as arc surfaces. Figure 2 、 Figure 3 and Figure 7 As shown, the surface of the elastic sealing member 30 is configured as a plane, and the first side wall 222 and the second side wall 223 are both configured as planes.

[0041] See also 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 h, the distance between the diaphragm 40 and the bottom wall of the assembly groove 22 is H, and 0.1H≤h≤0.3H.

[0042] 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.

[0043] like Figure 2 and Figure 5 As shown, 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.

[0044] For example, in one embodiment, Figure 2 and 8 As shown, the cross-sectional shape of the elastic sealing member 30 is T-shaped. In another embodiment, as shown in FIG. Figure 5 and Figure 9 As shown, the cross-section of the elastic sealing member 30 is L-shaped.

[0045] 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.

[0046] like Figure 1 As shown, 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 .

[0047] like Figure 1 and Figure 6 As shown, 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.

[0048] 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 into 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.

[0049] 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.

[0050] 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.

[0051] like Figure 1 As shown, 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 .

[0052] 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.

[0053] 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.

[0054] 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, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A one-way valve, characterized in that: The one-way valve comprises a valve tube (10), a valve seat (20), an elastic sealing member (30) and a diaphragm (40); the valve seat (20) is installed in the valve tube (10); a valve port (21) is provided on the valve seat (20) and passes through both ends of the valve seat (20); the elastic sealing member (30) is installed on an end surface of one end of the valve seat (20) and is arranged around the valve port (21); and at least a portion of the elastic sealing member (30) protrudes from the end surface of the valve seat (20); The diaphragm (40) is movably installed in the valve tube (10), and the diaphragm (40) can be pressed against the elastic seal (30) and close the valve port (21); or the diaphragm (40) can be separated from the elastic seal (30) and open the valve port (21).

2. The one-way valve according to claim 1, characterized in that: An assembly groove (22) is provided on the end surface of the valve seat (20) close to one end of the diaphragm (40), the assembly groove (22) is arranged around the valve port (21), and the assembly groove (22) has an opening (221) arranged toward the diaphragm (40), the elastic seal (30) is installed in the assembly groove (22), and at least a portion of the elastic seal (30) is exposed through the opening (221).

3. The one-way valve according to claim 2, characterized in that: The assembly groove (22) has a first side wall (222) and a second side wall (223) that are arranged opposite to each other, and along the direction from the bottom wall of the assembly groove (22) to the opening (221), at least one of the first side wall (222) and the second side wall (223) extends in a direction close to the other.

4. The one-way valve according to claim 2, characterized in that The assembly groove (22) has a first side wall (222) and a second side wall (223) that are arranged opposite to each other. Along the direction from the bottom wall of the assembly groove (22) to the opening (221), the first side wall (222) extends in a direction close to the second side wall (223), and the second side wall (223) extends in a direction away from the first side wall (222).

5. The one-way valve according to claim 4, characterized in that: The second side wall (223) includes a first section (223a) and a second section (223b), wherein 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), and 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).

6. The one-way valve according to claim 2, characterized in that: When the diaphragm (40) is pressed against the elastic seal (30) and closes the valve port (21), the gap between the diaphragm (40) and the end face of the valve seat (20) is h, the distance between the diaphragm (40) and the bottom wall of the assembly groove (22) is H, and 0.1H≤h≤0.3H.

7. The one-way valve according to claim 2, characterized in that: Along the direction from the bottom wall of the assembly groove (22) to the diaphragm (40), the cross-sectional width of the elastic sealing member (30) tends to increase.

8. The one-way valve according to claim 1, wherein: The one-way valve further comprises a magnet (50), wherein the magnet (50) is fixedly connected to the valve seat (20), and 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).

9. The one-way valve according to claim 1, characterized in that: The one-way valve further comprises a limit bracket (60), the limit bracket (60) being installed in the valve tube (10), a limit surface (61) being formed on the limit bracket (60), the limit surface (61) being spaced apart from the elastic seal (30), the diaphragm (40) being movably installed between the limit surface (61) and the elastic seal (30), and when the diaphragm (40) is separated from the elastic seal (30), the diaphragm (40) can be stopped at the limit surface (61).

10. The one-way valve according to claim 9, characterized in that: The limiting bracket (60) comprises a main body (62) and at least three supporting columns (63) distributed along the circumference of 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), and a sub-surface (631) is opened in the middle of each support column (63), and at least three sub-surfaces (631) constitute the limiting surface (61).

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