Reversing valve

Abstract

The utility model relates to the technical field of reversing valves, in particular to a reversing valve. The reversing valve comprises a main valve and a pilot valve, the main valve and the pilot valve are arranged at intervals in the first preset direction, a plane perpendicular to the first preset direction and passing through the axis of the pilot valve is defined as a first datum plane, and a plane perpendicular to the first preset direction and passing through the axis of the main valve is defined as a second datum plane. The reversing valve further comprises a connecting support which is of an integrated structure, the two ends of the connecting support are connected with the main valve and the pilot valve respectively in the first preset direction, the end, away from the main valve, of the connecting support does not exceed the first datum plane, and the end, away from the pilot valve, of the connecting support does not exceed the second datum plane. According to the reversing valve, the problems that in an existing reversing valve, a support structure for connecting the main valve and the pilot valve is high in cost and poor in shock resistance are solved.

Description

Technical Field

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

[0002] The reversing valve is an important component in the air-conditioning system, including the main valve and the pilot valve. To ensure the stability of the connection between the main valve and the pilot valve, usually, the main valve and the pilot valve must be connected through a bracket first, and then the whole is assembled into the air-conditioning system.

[0003] In the related art, the bracket usually includes multiple parts, which are first connected to the main valve and the pilot valve respectively and then fixedly connected by welding or other methods, and they often extend to the connection between the pilot valve and the capillary or the connection between the main valve and the pipe. This not only makes the bracket structure complicated and increases the cost, but also there are multiple connection and fixing points between the various parts of the bracket, which are easy to loosen under vibration conditions, thereby reducing the reliability of the connection between the main valve and the pilot valve. Utility Model Content

[0004] Based on this, it is necessary to provide a reversing valve to solve the problem that the bracket structure connecting the main valve and the pilot valve in the existing reversing valve is high in cost and poor in shock resistance.

[0005] The present application provides a reversing valve, which includes a main valve and a pilot valve, wherein the main valve and the pilot valve are spaced apart along a first preset direction, and a plane perpendicular to the first preset direction and passing through the axis of the pilot valve is defined as a first reference plane, and a plane perpendicular to the first preset direction and passing through the axis of the main valve is defined as a second reference plane; the reversing valve also includes a connecting bracket, which is an integrated structure, and along the first preset direction, the two ends of the connecting bracket are respectively connected to the main valve and the pilot valve, and an end of the connecting bracket away from the main valve does not exceed the first reference plane, and an end of the connecting bracket away from the pilot valve does not exceed the second reference plane.

[0006] In one embodiment, the connecting bracket includes a first fixing portion, a second fixing portion and a supporting portion, wherein the supporting portion is located between the first fixing portion and the second fixing portion; the first fixing portion is fitted on the outer surface of the pilot valve, and the second fixing portion is fitted on the outer surface of the main valve.

[0007] In one embodiment, the first fixing portion and the pilot valve are fixed by welding, and the second fixing portion and the main valve are fixed by welding.

[0008] In one embodiment, a first welding hole is formed on the first fixing portion, and / or a second welding hole is formed on the second fixing portion.

[0009] In one embodiment, the axes of the main valve and the pilot valve are arranged in parallel, and the plane defining the axis of the main valve and the axis of the pilot valve is a third reference plane; wherein the first fixing portion is symmetrically arranged along the third reference plane, and / or the second fixing portion is symmetrically arranged along the third reference plane.

[0010] In one embodiment, the number of the supporting portion is at least one, and the supporting portion is disposed on one side of the first fixing portion and the second fixing portion along a second preset direction; wherein the second preset direction is parallel to the axial direction of the main valve or the pilot valve.

[0011] In one embodiment, the number of the support parts is two, and the two support parts are respectively arranged on both sides of the first fixing part and the second fixing part along a third preset direction; wherein the third preset direction is perpendicular to the first preset direction and the axial direction of the main valve.

[0012] In one of the embodiments, a weight-reducing hole is provided on the support portion.

[0013] In one embodiment, the support portion is configured as a straight plate.

[0014] In one embodiment, the support portion and the first fixing portion are connected in a smooth transition, and / or the support portion and the second fixing portion are connected in a smooth transition.

[0015] Compared with the related art, the reversing valve provided by the present application optimizes the connecting bracket from the original multiple parts to an integrated structure, which is not only simple in structure and convenient to process, but also significantly reduces the number of connection points where the components on the connecting bracket are connected to each other, thereby effectively improving the structural strength and connection stability of the connecting bracket itself, and avoiding the fracture and failure of the components of the connecting bracket at the connection point under long-term vibration conditions. Therefore, it can effectively improve the seismic performance of the reversing valve and realize a reliable connection between the main valve and the pilot valve. In addition, since both ends of the connecting bracket are located between the first reference plane and the second reference plane, the area of ​​the connecting bracket extension is small, and there is no need to provide a corresponding matching structure for the fixation of structures such as capillaries or connecting pipes, thereby further simplifying the structure of the connecting bracket and greatly reducing the cost of the connecting bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a reversing valve according to an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a connecting bracket according to an embodiment of the present application;

[0019] Figure 3 A schematic structural diagram of a connecting bracket according to another embodiment of the present application;

[0020] Figure 4 A schematic structural diagram of a connecting bracket according to another embodiment of the present application;

[0021] Figure 5 A schematic structural diagram of a connecting bracket according to another embodiment of the present application.

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

[0023] 100, reversing valve; 10, main valve; 11, connecting pipe; 20, pilot valve; 21, capillary; 30, connecting bracket; 301a, first welding hole; 301b, second welding hole; 302, weight reduction hole; 31, first fixing part; 32, second fixing part; 33, supporting part. DETAILED DESCRIPTION

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

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

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

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

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

[0029] The reversing valve is an important component in the air-conditioning system, including the main valve and the pilot valve. To ensure the stability of the connection between the main valve and the pilot valve, usually, the main valve and the pilot valve must be connected through a bracket first, and then the whole is assembled into the air-conditioning system.

[0030] In the related art, the bracket usually includes multiple parts, which are first connected to the main valve and the pilot valve respectively and then fixedly connected by welding or other methods, and they often extend to the connection between the pilot valve and the capillary or the connection between the main valve and the pipe. This not only makes the bracket structure complicated and increases the cost, but also there are multiple connection and fixing points between the various parts of the bracket, which are easy to loosen under vibration conditions, thereby reducing the reliability of the connection between the main valve and the pilot valve.

[0031] See also Figure 1-Figure 5In order to solve the problem that the bracket structure connecting the main valve and the pilot valve in the existing reversing valve is high in cost and poor in seismic resistance, the present application provides a reversing valve 100. The reversing valve 100 includes a main valve 10 and a pilot valve 20, which are arranged at intervals along a first preset direction, and a plane perpendicular to the first preset direction and passing through the axis of the pilot valve 20 is defined as a first reference plane, and a plane perpendicular to the first preset direction and passing through the axis of the main valve 10 is defined as a second reference plane. The reversing valve 100 also includes a connecting bracket 30, which is an integrated structure, and along the first preset direction, the two ends of the connecting bracket 30 are respectively connected to the main valve 10 and the pilot valve 20, and the end of the connecting bracket 30 away from the main valve 10 does not exceed the first reference plane, and the end of the connecting bracket 30 away from the pilot valve 20 does not exceed the second reference plane.

[0032] It should be noted that, to ensure the reliability of the connection between the capillary tube 21 and the connecting pipe 11 , the capillary tube 21 is usually connected to the corresponding position of the first reference plane on the pilot valve 20 , and the connecting pipe 11 is connected to the corresponding position of the second reference plane on the main valve 10 .

[0033] It is understandable that the present application optimizes the connecting bracket 30 from the original multiple parts to an integrated structure, which is not only simple in structure and convenient for processing, but also significantly reduces the number of connection points where the parts on the connecting bracket 30 are connected to each other, thereby effectively improving the structural strength and connection stability of the connecting bracket 30 itself, and avoiding the fracture and failure of the parts of the connecting bracket 30 at the connection points under long-term vibration conditions. Therefore, it can effectively improve the anti-seismic performance of the reversing valve 100 and realize the reliable connection between the main valve 10 and the pilot valve 20. In addition, since both ends of the connecting bracket 30 are located between the first reference plane and the second reference plane, the extending area of ​​the connecting bracket 30 is small, and there is no need to provide a corresponding matching structure for fixing structures such as the capillary 21 or the connecting pipe 11, thereby further simplifying the structure of the connecting bracket 30 and greatly reducing the cost of the connecting bracket 30.

[0034] For ease of explanation, this application defines Figure 1 The first preset direction (indicated by z) is shown, and the second preset direction (indicated by x) and the third preset direction (indicated by y) are described below.

[0035] In one embodiment, if Figure 2-Figure 5 As shown, the connecting bracket 30 includes a first fixing portion 31, a second fixing portion 32 and a supporting portion 33, wherein the supporting portion 33 is located between the first fixing portion 31 and the second fixing portion 32. The first fixing portion 31 is attached to the outer surface of the pilot valve 20, and the second fixing portion 32 is attached to the outer surface of the main valve 10.

[0036] That is, the first fixing portion 31 and the second fixing portion 32 are both arc-shaped plate structures adapted to the surface of the main valve 10 or the pilot valve 20, which can effectively increase the contact area between the connecting bracket 30 and the main valve 10 and the pilot valve 20, and improve the connection strength.

[0037] Furthermore, in one embodiment, the first fixing portion 31 and the pilot valve 20 are fixed by welding to further improve the connection strength between the first fixing portion 31 and the pilot valve 20. The first fixing portion 31 and the pilot valve 20 can be formed by laser welding or furnace welding.

[0038] To facilitate welding between the first fixing portion 31 and the pilot valve 20, in one embodiment, Figure 3 and Figure 4 As shown, a first welding hole 301a is opened on the first fixing portion 31, and solder can be placed in the first welding hole 301a. After the solder melts, it can better penetrate into various places on the contact surface of the first fixing portion 31 and the pilot valve 20, thereby improving the welding quality of the welding fixation.

[0039] In one embodiment, the second fixing portion 32 and the main valve 10 are fixed by welding to further improve the connection strength between the second fixing portion 32 and the main valve 10. The second fixing portion 32 and the main valve 10 can be formed by laser welding or furnace welding.

[0040] To facilitate welding between the second fixing portion 32 and the main valve 10, in one embodiment, Figure 3 and Figure 4 As shown, a second welding hole 301b is provided on the second fixing portion 32. Similarly, solder can be placed in the second welding hole 301b. After the solder melts, it can better penetrate into various places on the contact surface between the second fixing portion 32 and the main valve 10, thereby improving the welding quality of the welding fixation.

[0041] In summary, by opening welding holes on the first fixing portion 31 and / or the second fixing portion 32, the welding reliability between the connecting bracket 30 and the main valve 10 and the pilot valve 20 can be improved. Figure 2 and Figure 5 As shown, no welding holes are provided on the first fixing portion 31 and the second fixing portion 32 , as long as a stable connection between the connecting bracket 30 and the main valve 10 and the pilot valve 20 can be achieved.

[0042] Among them, the number of first welding holes 301a on the first fixing part 31 and the second welding holes 301b on the second fixing part 32 can be reasonably set according to actual needs. For example, a first welding hole 301a can be opened on the first fixing part 31 and a second welding hole 301b can be opened on the second fixing part 32, or a first welding hole 301a can be opened on the first fixing part 31 and two second welding holes 301b can be opened on the second fixing part 32, etc., which are not listed one by one here.

[0043] In other embodiments, the first fixing portion 31 and the pilot valve 20 , and the second fixing portion 32 and the main valve 10 may be fixedly connected by means of screw connection or clamping.

[0044] Generally, in order to improve the space utilization of the reversing valve 100, the relative position layout between the main valve 10 and the pilot valve 20 needs to make the axes of the main valve 10 and the pilot valve 20 parallel. Here, the plane passing through the axis of the main valve 10 and the axis of the pilot valve 20 is defined as the third reference plane. Among them, the first fixing part 31 is symmetrically arranged along the third reference plane, so that the force on the pilot valve 20 is more uniform, which can further improve the stability of the connection between the first fixing part 31 and the pilot valve 20.

[0045] In another embodiment, the second fixing portion 32 is symmetrically arranged along the third reference plane, so that the force on the main valve 10 is more uniform, which can further improve the stability of the connection between the second fixing portion 32 and the main valve 10 .

[0046] In one embodiment, if Figure 2-Figure 5 As shown, the support portion 33 is configured as a straight plate, so that the support portion 33 has a simple structure and is easy to process, and can achieve a supporting and connecting effect for the first fixing portion 31 and the second fixing portion 32 .

[0047] Furthermore, in one embodiment, the support portion 33 and the first fixing portion 31 are connected in a smooth transition, that is, the connection between the support portion 33 and the first fixing portion 31 can be transitioned by a curved surface, etc., which not only improves safety but also reduces stress concentration at the connection and reduces the probability of fracture.

[0048] Similarly, in one embodiment, the support portion 33 and the second fixing portion 32 are connected in a smooth transition, that is, the connection between the support portion 33 and the second fixing portion 32 can be transitioned by a curved surface, etc., which not only improves safety but also reduces stress concentration at the connection and reduces the probability of fracture.

[0049] In order to reduce the weight of the entire connecting bracket 30 and achieve lightweight, in one embodiment, as shown in FIG. Figure 5 As shown, a weight-reducing hole 302 can be opened on the support portion 33 on the basis of ensuring the structural strength of the support portion 33 .

[0050] In one embodiment, if Figure 2 and Figure 3 As shown, the number of the supporting portion 33 is at least one, and the supporting portion 33 is disposed on one side of the first fixing portion 31 and the second fixing portion 32 along the second preset direction. The second preset direction is parallel to the axial direction of the main valve 10 or the pilot valve 20.

[0051] That is, in this embodiment, the connecting bracket 30 is in a U-shaped structure as a whole. Thus, the connecting bracket 30 has a simple structure and can reduce costs.

[0052] In another embodiment, if Figure 4 and Figure 5 As shown, there are two support parts 33 , and the two support parts 33 are respectively arranged on both sides of the first fixing part 31 and the second fixing part 32 along the third preset direction. The third preset direction is perpendicular to the first preset direction and the axial direction of the main valve 10 .

[0053] That is, in this embodiment, the connecting bracket 30 is a rectangular frame structure as a whole. In this way, the supporting effect of the connecting bracket 30 on the main valve 10 and the pilot valve 20 is more reliable, and the stability of the reversing valve 100 is improved.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A reversing valve, comprising a main valve (10) and a pilot valve (20), wherein the main valve (10) and the pilot valve (20) are arranged at intervals along a first preset direction, a plane perpendicular to the first preset direction and passing through the axis of the pilot valve (20) is defined as a first reference plane, and a plane perpendicular to the first preset direction and passing through the axis of the main valve (10) is defined as a second reference plane; It is characterized in that The reversing valve further comprises a connecting bracket (30), the connecting bracket (30) being an integrated structure, and along the first preset direction, the two ends of the connecting bracket (30) are respectively connected to the main valve (10) and the pilot valve (20), and the end of the connecting bracket (30) away from the main valve (10) does not exceed the first reference plane, and the end of the connecting bracket (30) away from the pilot valve (20) does not exceed the second reference plane.

2. The reversing valve according to claim 1, characterized in that: The connecting bracket (30) comprises a first fixing portion (31), a second fixing portion (32) and a supporting portion (33), wherein the supporting portion (33) is located between the first fixing portion (31) and the second fixing portion (32); the first fixing portion (31) is arranged in close contact with the outer surface of the pilot valve (20), and the second fixing portion (32) is arranged in close contact with the outer surface of the main valve (10).

3. The reversing valve according to claim 2, characterized in that: The first fixing portion (31) and the pilot valve (20) are fixed by welding, and the second fixing portion (32) and the main valve (10) are fixed by welding.

4. The reversing valve according to claim 3, characterized in that: The first fixing portion (31) is provided with a first welding hole (301a), and / or the second fixing portion (32) is provided with a second welding hole (301b).

5. The reversing valve according to claim 2, characterized in that: The axes of the main valve (10) and the pilot valve (20) are arranged in parallel, and a plane defining the axis of the main valve (10) and the axis of the pilot valve (20) is a third reference plane; Wherein, the first fixing portion (31) is symmetrically arranged along the third reference plane, and / or the second fixing portion (32) is symmetrically arranged along the third reference plane.

6. The reversing valve according to claim 2, characterized in that: The number of the supporting portion (33) is at least one, and the supporting portion (33) is arranged on one side of the first fixing portion (31) and the second fixing portion (32) along the second preset direction; Wherein, the second preset direction is parallel to the axial direction of the main valve (10) or the pilot valve (20).

7. The reversing valve according to claim 2, characterized in that: The number of the supporting parts (33) is two, and the two supporting parts (33) are respectively arranged on both sides of the first fixing part (31) and the second fixing part (32) along the third preset direction; Wherein, the third preset direction is perpendicular to the first preset direction and the axial direction of the main valve (10).

8. The reversing valve according to claim 2, characterized in that: The support portion (33) is provided with a weight-reducing hole (302).

9. The reversing valve according to claim 2, characterized in that: The support portion (33) is configured as a straight plate.

10. The reversing valve according to claim 2, characterized in that: The supporting portion (33) and the first fixing portion (31) are connected in a smooth transition, and / or the supporting portion (33) and the second fixing portion (32) are connected in a smooth transition.

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