A reversing valve

Abstract

A reversing valve comprises an end cover component, a valve body component, a sealing element, a fastener, the sealing element is located between the end cover component and the valve body component, the sealing element comprises a sealing element through hole, the end cover component comprises an end cover, the end cover comprises a connecting part, the connecting part comprises a connecting part through hole, the valve body component comprises a valve body, the valve body comprises a mounting part, the mounting part comprises a threaded hole, the fastener comprises a threaded section, the threaded section penetrates through the connecting part through hole and the sealing element through hole, and the fastener is screwed with the valve body through the threaded hole. The reversing valve provided in the application, the sealing element is located between the end cover component and the valve body component, the sealing element comprises a sealing element through hole, the threaded section of the fastener penetrates through the connecting part through hole and the sealing element through hole, and the fastener is screwed with the valve body through the threaded hole. The sealing structure of the end cover component and the valve body component is compact, no additional space for the sealing element is reserved by avoiding the fastener, and the sealing of the end cover component and the valve body component can be ensured without increasing the volume of the end cover component and the valve body component.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, specifically to a reversing valve. Background Technology

[0002] As demand in the commercial refrigeration market continues to rise, competition in the large-capacity four-way valve market is becoming increasingly fierce. Because commercial refrigeration systems have large capacities, leaks can cause significant losses to customers. Therefore, high sealing performance is required for four-way valves. Furthermore, as the system's cooling capacity increases, the weight of the product also increases; thus, weight should be reduced while still fulfilling the required functionality.

[0003] Background Technology: Large-capacity four-way directional valves. The main body of the four-way valve consists of a valve body 01 and a connecting pipe, forming the valve body component. An internal slider component is assembled, and there are two end cap components 02 on both sides. After the end cap components 02 are assembled with the valve body component, they are detachably connected by screws, which further increases the volume of the valve body 01. Therefore, without adjusting the dimensions of the end caps 02 and the valve body 01, how to ensure the seal between the end caps and the valve body is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] To address the aforementioned issues, this application provides a reversing valve that ensures the sealing of the end cover component and the valve body component without increasing their volume.

[0005] The reversing valve of this utility model includes: an end cover component, a valve body component, a seal, and a fastener. The seal is located between the end cover component and the valve body component and includes a sealing through hole. The end cover component includes an end cover and a connecting part, which includes a connecting through hole. The valve body component includes a valve body and a mounting part, which includes a threaded hole. The fastener includes a threaded section that passes through the connecting through hole and the sealing through hole. The fastener and the valve body are threadedly connected through the threaded hole.

[0006] The directional valve provided in this application has a seal located between the end cover component and the valve body component. The seal includes a sealing through hole, the end cover includes a connecting through hole, the valve body includes a threaded hole, and the fastener includes a threaded section that passes through the connecting through hole and the sealing through hole. The fastener and the valve body are connected by threads through the threaded hole. The sealing structure of the end cover component and the valve body component is compact, and there is no need to reserve additional space for the seal to avoid the fastener. The sealing of the end cover component and the valve body component can be guaranteed without increasing the volume of the end cover component and the valve body component. Attached Figure Description

[0007] Figure 1 A cross-sectional schematic diagram of a reversing valve is provided as background technology.

[0008] Figure 2 The diagram shown is a partial explosion-proof schematic of the directional valve provided by this utility model.

[0009] Figure 3 The figure shown is a cross-sectional schematic diagram of the reversing valve provided by this utility model.

[0010] Figure 4 As shown Figure 3 A partial sectional view of point I in the diagram;

[0011] Figure 5 As shown Figure 3 A schematic diagram of the middle end cap from one direction;

[0012] Figure 6 As shown Figure 3 A schematic diagram of the central sealing element from one direction;

[0013] Figure 7 The image shown is a front view of the directional valve provided by this utility model.

[0014] Figure 8 The image shown is a rear view of the directional valve provided by this utility model.

[0015] Figure 9 The image shown is a bottom view of the reversing valve provided by this utility model.

[0016] Figure 10 The image shown is a top view of the reversing valve provided by this utility model.

[0017] Figure 11 The image shown is a left view of the reversing valve provided by this utility model.

[0018] Figure 12 The image shown is a right view of the reversing valve provided by this utility model.

[0019] Figure 13 The image shown is a perspective view of the reversing valve provided by this utility model.

[0020] Figure 14 The image shown is another perspective view of the reversing valve provided by this utility model;

[0021] Figure label:

[0022] 1. End cap component;

[0023] 11. End cap; 111. Connecting part; 112. Cylindrical part; 1111. Connecting through hole; 1112. Inner stepped part; 1113. Inner stepped surface; 1114. Inner stepped wall;

[0024] 2. Valve body components;

[0025] 21. Valve body; 211. Mounting part; 2111. Threaded hole;

[0026] 212, Step section; 2121, Step wall; 2122, Valve body step surface; 213, Second mounting section;

[0027] 3. Seal; 31. Seal through hole; 32. Notch;

[0028] 4. Fasteners, 411, threaded section;

[0029] 5. Second seal; 6. Second end cap assembly; 8. Piston assembly; 9. Valve core assembly

[0030] A. First sidewall portion, B. Second sidewall portion, C. Third sidewall portion, D. Fourth sidewall portion; a. First pipe connection port, b. Second pipe connection port, c. Third pipe connection port, d. Fourth pipe connection port;

[0031] a' First takeover, b' Second takeover, c' Third takeover, d' Fourth takeover;

[0032] a'', First valve core flow channel; b'', Second valve core flow channel; c'', Third valve core flow channel; d'', Fourth valve core flow channel. Specific Implementation

[0033] Exemplary embodiments will now be described in detail. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements.

[0034] It should be understood that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "several" indicates two or more quantities, unless otherwise specified. The directional terms such as upper, lower, left, right, front, back, inner, outer, top, and bottom mentioned or possibly mentioned herein are defined relative to the construction shown in the corresponding drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. The terms "comprising" or "including," and similar expressions, indicate that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects.

[0035] The switching valve of a specific embodiment of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can complement or combine with each other. 11. As shown in Figure 2, Figure 3As shown, this type of four-way valve includes an end cap component 1, a valve body component 2, a seal 3, and a fastener 4. The end cap component 1 is connected to the valve body component 2 via a threaded detachable connection. When maintenance or replacement of internal parts is required, the valve cap component 1 and valve body component 2 can be easily disassembled via the threads. The seal 3 is located between the end cap component 1 and the valve body component 2. In other words, the seal 3 is positioned between the end cap component 1 and the valve body component 2. When the end cap component 1 and valve body component 2 are threaded together, the seal 3 effectively improves the sealing performance. End cap component 1 includes an end cap 11, which includes a connecting portion 111 and a connecting through hole 1111. Valve body component 2 includes a valve body 21, which includes a mounting portion 211 and a threaded hole 2111. Fastener 4 includes a threaded section 411, which passes through the connecting through hole 1111 and the sealing through hole 31. Fastener 4 is threadedly connected to the threaded hole 2111. This design ensures sealing between the end cap component 1 and the valve body component 2 without increasing their volume. Because the fastener 4 passes through the sealing through hole 31 along the transverse direction of the directional valve, rather than avoiding the sealing element 3, this design reduces the product's volume. It should be noted that the end cap 11 and valve body 21 are made of carbon steel, and the sealing element 3 is made of asbestos-free gasket. Other materials are also acceptable, such as plastic, rubber, or other elastic materials that facilitate sealing.

[0036] like Figure 5 As shown, end cap component 1 includes end cap 11, which includes a connecting portion 111. Along the transverse direction of the directional valve, the connecting portion 111 is approximately rectangular and includes a connecting through hole 1111. Valve body component 2 includes valve body 21, which includes a mounting portion 211. Along the transverse direction of the directional valve, the mounting portion 211 is approximately rectangular and includes a sealing element 3. The sealing element 3 is also approximately rectangular and includes a threaded hole 2111, which is a blind hole. The connecting through hole 1111 and the threaded hole 2111 are positioned opposite each other. A fastener 4 is partially located within the connecting through hole 1111 and the threaded hole 2111. In other words, the fastener 4 passes through the connecting through hole 1111 and the sealing element through hole 31. The "relatively positioned" here means that the center axes of the holes are aligned. This arrangement allows the fastener 4 to pass through the connecting through hole 1111 and into the threaded hole 2111, thus connecting the end cap 11 to the valve body 21.

[0037] like Figure 4As shown, the mounting portion 211 also includes a step portion 212, which includes a valve body step wall 2121 and a valve body step surface 2122 facing the end cover 11. The seal 3 is located in the step portion 212, and the step portion 212 restricts the circumferential displacement of the seal 3. One end of the seal 3 abuts against the valve body step surface 2122 of the step portion 212. The thickness of the seal 3 is defined as h1, which is the distance between the inner step surface 1113 and the step surface 2122 of the inner step portion 1112r. Define the step height of the step portion 212 as h2, then h1 is greater than or equal to 1.2h2, and the step height of the step portion 212 is greater than or equal to the thickness of the seal 3. That is to say, when the seal 3 is placed on the step portion 212, a part of it is higher than the step portion 212. This setting ensures that when the end cap 11 is connected to the valve body 21, one end of the seal 3 abuts against the end cap 11, and the other end of the seal 3 abuts against the valve body 21. The setting of the step portion 212 allows the seal 3 to reserve at least 20% compression margin in the lateral direction of the reversing valve, which can further ensure the product's sealing performance.

[0038] like Figure 4 As shown, the connecting part 111 includes an inner stepped part 1112, which includes an inner stepped surface 1113 and an inner stepped wall 1114. The inner stepped surface 1113 abuts against the sealing element 3. The valve body 21 includes a receiving cavity, and a portion of the inner stepped wall 1114 is located within the receiving cavity of the valve body 21. The inner stepped wall 1114 is clearance-fitted with the inner sidewall of the valve body 21. The portion of the inner stepped wall 1114 located within the receiving cavity of the valve body 21 serves as an assembly guide section, which helps to improve the assembly efficiency of the end cap 11 and the valve body 21.

[0039] like Figure 4 As shown, along the longitudinal direction of the directional control valve, the minimum distance between the inner wall of the threaded hole 2111 and the outer wall of the mounting part 211 is defined as W1, and the wall thickness of the mounting part 211 is defined as W2. Then, W1 is greater than or equal to 1 / 4W2. It should be noted that this type of directional control valve is often used at high pressure. The setting of the threaded hole 2111 reduces the local wall thickness of the valve body 21, which affects the pressure resistance of the directional control valve. Therefore, when setting the threaded hole 2111, it should be as close as possible to the inner wall of the valve body 21 to ensure the thickness of the outer wall, thereby ensuring that the pressure resistance of the directional control valve meets the design requirements.

[0040] like Figure 4As shown, with the plane perpendicular to the central axis of the valve body 21 as the projection plane, the projected outline of the mounting part 211 lies within the projected outline of the connecting part 111. That is, the projected outline of the connecting part 111 is larger than that of the mounting part 211, meaning the outer wall outline of the connecting part 111 is larger than that of the mounting part 211. It should be noted that the mounting part 211 and the connecting part 111 are two separate parts, and dimensional deviations may exist during part processing. This could lead to situations where the outer walls of the mounting part 211 and the connecting part 111 are not perfectly aligned when the directional valve is assembled. This design ensures the contact area between the mounting part 211 and the connecting part 111 and also improves the overall aesthetics of the product.

[0041] like Figure 6 As shown, the seal 3 also includes a notch 32. The projection of the seal 3 is located within the projection range of the valve body step surface 2122. In Figure 6, the dashed line represents the projection of the valve body step surface 2122. It can be seen that the notch 32 reduces the contact area between the seal 3 and the step surface 2122. The sealing torque of the seal 3 depends on the ratio of force to area. Reducing the contact area of ​​the seal 3 helps to reduce the sealing torque. However, under the premise of meeting the sealing performance, the area of ​​the seal 3 is not necessarily better the smaller it is. The inner wall of the through hole 31 and the inner side wall of the seal 3 are important parts to ensure the seal. The minimum distance between the through hole 31 and the inner side wall of the seal 3 is defined as H1. Then H1 is greater than or equal to 5mm. Setting H1 to 5mm or more can ensure the reliability of the seal 3. When the valve cover 11 is tightened to the valve body 21 by the fastener 4, the seal 3 can still maintain an intact sealing surface under the extrusion force from both sides and will not be damaged due to the extrusion force, resulting in leakage.

[0042] It should be noted that, along the transverse direction of the reversing valve, the number of threaded holes 2111 is at least four. To ensure uniform force distribution on the seal 3, the threaded holes 2111 should be evenly distributed circumferentially along the valve body step surface 2122. Since the valve body step surface 2122 is a rectangular ring, at least one threaded hole 2111 is provided in each direction of the rectangle. Correspondingly, the number of connecting through holes 1111 corresponds to the number of threaded holes 2111, and the number of fasteners 4 corresponds to the number of threaded holes 2111. The fasteners 4 are screws. Figure 2 As shown, in the solution of this application, there are 12 connecting through holes 1111, 12 threaded holes 2111, and 12 fasteners 4. This arrangement can ensure the sealing reliability of the end cover 11 after it is assembled with the valve body 21.

[0043] The reversing valve of this application also includes a piston component 8 and a valve core component 9. The end cover 11 also includes a cylindrical portion 112, which includes a cylindrical cavity. The piston component 8 is located in the cylindrical cavity, and the valve core component 9 is located in the receiving cavity of the valve body 21. The piston component 8 and the valve core component 9 are fixedly connected. The piston component 8 drives the valve core component 9 to slide within the cavity of the reversing valve. The valve body 21 includes a first side wall portion A, a second side wall portion B, a third side wall portion C, and a fourth side wall portion D. The first side wall portion A, the second side wall portion B, the third side wall portion C, and the fourth side wall portion D are located in four directions of the valve body 21, respectively. The first side wall portion A and the third side wall portion C are arranged opposite to each other, and the second side wall portion B and the fourth side wall portion D are arranged opposite to each other. The first sidewall portion A includes a first pipe connection port a, which is fixedly connected to the first pipe a'; the second sidewall portion B includes a second pipe connection port b, which is fixedly connected to the second pipe b'; the third sidewall portion C includes a third pipe connection port c, which is fixedly connected to the third pipe c'; and the fourth sidewall portion D includes a fourth pipe connection port d, which is fixedly connected to the fourth pipe d'. The valve core component 9 includes a first valve core flow channel a'', a second valve core flow channel b'', a third valve core flow channel c'', and a fourth valve core flow channel d''. When the directional valve is in the first working state, the first connecting port a, the first valve core flow channel a'', and the second connecting port b are connected, and the fourth connecting port d, the second valve core flow channel b'', and the third connecting port c are connected. When the directional valve is in the second working state, the first connecting port a, the third valve core flow channel c'', and the fourth connecting port d are connected, and the second connecting port b, the fourth valve core flow channel d'', and the third connecting port c are connected. The valve core component 9 slides within the cavity of the directional valve and can abut against the corresponding connecting port to achieve the switching of the system flow path.

[0044] The reversing valve of this application also includes a second end cap component 6 and a second seal 5. The valve body 21 also includes a second mounting portion 213. The mounting portion 211 and the second mounting portion 213 are respectively located on both sides of the valve body 21. The second end cap component 6 is threadedly connected to the second mounting portion 213. The second seal 5 is located between the second end cap component 6 and the second mounting portion 213. Fasteners 4 connect the second end cap component 6, the second seal 5, and the second mounting portion 213. That is, one side of the valve body 21 is connected to the end cap component 1 by fasteners 4, and the other side of the valve body 21 is connected to the second end cap component 6 by fasteners 4. For the sake of parts standardization and error prevention during disassembly and assembly, fasteners 4 are standard parts. Therefore, the sealing structures on both sides are symmetrically arranged, and the assembly process is also the same. The structure of the same parts has been specifically described in the above description and will not be described again.

[0045] It should be noted that the above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A directional control valve, comprising: The assembly comprises an end cap component (1), a valve body component (2), a seal (3), and a fastener (4). The seal (3) is located between the end cap component (1) and the valve body component (2). The seal (3) includes a seal through hole (31). The end cap component (1) includes an end cap (11). The end cap (11) includes a connecting part (111). The connecting part (111) includes a connecting through hole (1111). The valve body component (2) includes a valve body (21). The valve body (21) includes a mounting part (211). The mounting part (211) includes a threaded hole (2111). The fastener (4) includes a threaded section (411). The threaded section (411) passes through the connecting through hole (1111) and the seal through hole (31). The fastener (4) and the valve body (21) are threadedly connected through the threaded hole (2111).

2. The reversing valve according to claim 1, characterized in that, The mounting portion (211) is rectangular and the sealing element (3) is rectangular and the mounting portion (211) also includes a stepped portion (212). The stepped portion (212) includes a valve body stepped surface (2122). The sealing element (3) is located on the stepped portion (212). The stepped portion (212) restricts the circumferential displacement of the sealing element (3). Along the transverse direction of the reversing valve, one end of the sealing element (3) abuts against the valve body stepped surface (2122) and one end of the sealing element (3) abuts against the end cap (11).

3. The reversing valve according to claim 2, characterized in that, The connecting portion (111) includes an inner stepped portion (1112), the inner stepped portion (1112) includes an inner stepped surface (1113) and an inner stepped wall (1114), the inner stepped surface (1113) abuts against the sealing element (3), the valve body (21) includes a receiving cavity, and the inner stepped wall (1114) is partially located in the receiving cavity of the valve body (21). The inner stepped wall (1114) is clearance-fitted with the inner side wall of the valve body (21).

4. The reversing valve according to claim 3, characterized in that, Along the longitudinal direction of the reversing valve, the minimum distance between the inner wall of the threaded hole (2111) and the outer wall of the mounting part (211) is defined as W1, and the wall thickness of the mounting part (211) is defined as W2. Then W1 is greater than or equal to 1 / 4W2. The distance between the inner step surface (1113) and the step surface (2122) of the step part (212) is defined as h1, and the step height of the step part (212) is defined as h2. Then h1 is greater than or equal to 1.2h2.

5. The reversing valve according to claim 2 or 3, characterized in that, Along the longitudinal direction of the reversing valve, the minimum distance between the inner wall of the threaded hole (2111) and the outer wall of the mounting part (211) is defined as W1, and the wall thickness of the mounting part (211) is defined as W2. Then W1 is greater than or equal to 1 / 4W2. The thickness of the sealing element (3) is defined as h1, and the step height of the stepped part (212) is defined as h2. Then h1 is greater than or equal to 1.2h2. The plane perpendicular to the central axis of the valve body 21 is the projection plane, and the projection outline of the mounting part (211) is located within the projection outline of the connecting part (111).

6. The reversing valve according to any one of claims 2-5, characterized in that, The seal (3) includes a notch (32). Along the transverse direction of the reversing valve, the projection of the seal (3) is located within the projection range of the valve body step surface (2122). The distance between the hole wall of the seal (31) and the inner wall of the seal (3) is defined as H1, which satisfies that H1 is greater than or equal to 5mm.

7. The reversing valve according to any one of claims 2-5, characterized in that, The sealing element (3) includes a notch (32). Along the transverse direction of the reversing valve, the projection of the sealing element (3) is located within the projection range of the valve body step surface (2122). The distance between the hole wall of the sealing element through hole (31) and the inner wall of the sealing element (3) is defined as H1, which satisfies that H1 is greater than or equal to 5mm. The end cap (11) is made of carbon steel, the valve body (21) is made of carbon steel, and the sealing element (3) is made of asbestos-free gasket.

8. The reversing valve according to claim 7, characterized in that, Along the circumference of the mounting part (211), the number of threaded holes (2111) is at least 4. The valve body step surface (2122) is rectangular ring-shaped. On the rectangular ring-shaped valve body step surface (2122), at least one threaded hole (2111) is provided along each rectangular side. The number and position of the connecting through holes (1111) are provided in accordance with the number of threaded holes (2111). The number of fasteners (4) is provided in accordance with the number of threaded holes (2111). The fasteners (4) are screws.

9. The reversing valve according to claim 8, characterized in that, It also includes a piston component (8) and a valve core component (9). The end cap (11) also includes a cylindrical portion (112), the cylindrical portion (112) including a cylindrical cavity. The piston component (8) is located in the cylindrical cavity, and the valve core component (9) is located in the receiving cavity of the valve body (21). The piston component (8) is connected to the valve core component (9). The piston component (8) drives the valve core component (9) to slide within the cavity of the reversing valve. The valve body (21) includes a first sidewall portion (A), a second sidewall portion (B), a third sidewall portion (C), and a fourth sidewall portion (D). The first sidewall portion (A) and the third sidewall portion (C) are disposed opposite to each other, and the second sidewall portion (B) and the fourth sidewall portion (D) are disposed opposite to each other. The first sidewall portion (A) includes a first pipe connection port (a), which is fixedly connected to the first pipe (a'); the second sidewall portion (B) includes a second pipe connection port (b), which is fixedly connected to the second pipe (b'); the third sidewall portion (C) includes a third pipe connection port (c), which is fixedly connected to the third pipe (c'); the fourth sidewall portion (D) includes a fourth pipe connection port (d), which is fixedly connected to the fourth pipe (d'); and the valve core component (9) includes a first valve core flow channel (a''), a second valve core flow channel (b''), a third valve core flow channel (c''), and a fourth valve core flow channel. (d''), when the reversing valve is in the first working state, the first connecting pipe port (a), the first valve core flow channel (a''), and the second connecting pipe port (b) are connected, and the fourth connecting pipe port (d), the second valve core flow channel (b''), and the third connecting pipe port (c) are connected; when the reversing valve is in the second working state, the first connecting pipe port (a), the third valve core flow channel (c''), and the fourth connecting pipe port (d) are connected, and the second connecting pipe port (b), the fourth valve core flow channel (d''), and the third connecting pipe port (c) are connected.

10. The reversing valve according to claim 9, characterized in that, It also includes a second end cap component (6) and a second seal (5). The valve body (21) also includes a second mounting part (213). The mounting part (211) and the second mounting part (213) are respectively located on both sides of the valve body (21). The second end cap component (6) and the second mounting part (213) are connected by a fastener (4). The second seal (5) is located between the second end cap component (6) and the second mounting part (213). The fastener (4) connects the second end cap component (6), the second seal (5), and the second mounting part (213).

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