Valve assembly of switching valve and switching valve

Abstract

The valve assembly of the switching valve comprises a valve body and a valve seat, a valve cavity is formed in the valve body, a pipe inlet hole used for installing an air inlet pipe and a pipe connecting hole used for installing a connecting pipe are formed in the valve body, and the pipe inlet hole and the pipe connecting hole are both communicated with the valve cavity. The valve body is provided with a valve cavity and at least two pipe connecting holes, the pipe connecting holes are arranged at intervals in the axial direction of the valve body, the valve seat is located in the valve cavity, the position, corresponding to the pipe connecting holes, of the valve seat is provided with valve seat holes communicating the pipe connecting holes with the valve cavity, and the valve body is further provided with through holes used for containing welding materials. The through hole penetrates through the valve body in the wall thickness direction of the valve body. By means of the arrangement, the combination face between the valve body and the valve seat is completely filled and covered with the welding flux, the situation of welding breaking is prevented, the welding quality is improved, the combination strength between the valve body and the valve seat is better, and the better combination effect is achieved.

Description

Technical Field

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

[0002] Existing reversing valves include three-way valves, four-way valves, etc., and generally include a valve body, a valve seat, and a slider disposed in the inner cavity of the valve body. Among them, the valve body is provided with an inlet and a plurality of reversing interfaces, and the slider moves in the inner cavity of the valve body to realize the connection between the inlet and one of the reversing interfaces.

[0003] Currently, the valve body and the valve seat are usually fixed by welding. After the solder is melted by heat, there are often some areas between the valve body and the valve seat that cannot be completely filled and covered, resulting in the occurrence of broken welding, which affects the structural strength. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a reversing valve to improve the bonding strength between the valve body and the valve seat.

[0005] To solve the above technical problems, the present application provides a valve assembly of a switching valve, including a valve body and a valve seat. A valve cavity is formed inside the valve body. The valve body is provided with an inlet pipe hole for installing an inlet pipe and a connection pipe hole for installing a connection pipe. Both the inlet pipe hole and the connection pipe hole are communicated with the valve cavity. There are at least two connection pipe holes, which are arranged at intervals along the axial direction of the valve body. The valve seat is located in the valve cavity, and the valve seat is provided with a valve seat hole at a position corresponding to the connection pipe hole to communicate the connection pipe hole with the valve cavity. The valve body is provided with a through hole for accommodating welding material at a position corresponding to the valve seat, and the through hole penetrates the valve body along the wall thickness direction of the valve body.

[0006] In one embodiment, the through hole is located between two adjacent connection pipe holes. Naturally, the through hole and the connection pipe hole are arranged on the same side.

[0007] It can be understood that such a setting shortens the distance between the through hole and the two connection pipe holes. The welding material (such as a welding ring, welding wire, filler metal, or solder paste) in the through hole is melted by heat, so that the bonding surface between the first side wall of the valve seat and the valve body is completely filled and covered by the welding material, which can connect the valve body and the valve seat together, prevent the occurrence of broken welding, and improve the welding quality.

[0008] In one embodiment, the through hole is located exactly in the middle of two adjacent connection pipe holes.

[0009] It can be understood that such a setting makes the distance between the through hole and the two connecting holes equivalent. After the welding material in the through hole is heated and melted, the welding material will be better filled between the valve body and the valve seat, and the circumference of the two connecting holes and the circumference of the corresponding valve seat holes can also be better filled with welding material, thereby better improving the welding quality.

[0010] In one embodiment, a side wall of the valve seat facing the through hole is defined as a first side wall, and the through hole is isolated from the valve cavity by the first side wall.

[0011] In one embodiment, the portion of the first side wall corresponding to the through hole is a complete wall surface.

[0012] It can be understood that such an arrangement allows the molten welding material to flow better between the valve body and the valve seat and fill the joint surface between the two, thereby preventing welding breakage and improving the welding quality between the valve body and the valve seat.

[0013] In one embodiment, the pipe inlet hole is coaxially arranged with the through hole.

[0014] In one embodiment, the axis of the through hole and the axes of each of the connecting holes are located on the same plane.

[0015] In one embodiment, there are two connecting pipe holes, and the through hole and the connecting pipe hole have the same shape and size.

[0016] In one embodiment, the through hole is located beside at least two of the connecting holes, that is, one of the at least two connecting holes is located between the through hole and the other connecting hole.

[0017] In one embodiment, the through hole and the connecting hole are both circular holes, and the diameter φA of the through hole and the diameter φB of the connecting hole satisfy: φA≤φB.

[0018] In one embodiment, the pipe inlet hole is a circular hole, and the diameter φa of the pipe inlet hole and the diameter φA of the through hole satisfy: φa<φA.

[0019] The present application also provides a switching valve, including a valve assembly, which is the valve assembly of any one of the above embodiments. A sliding member for switching the flow direction of the fluid is also provided in the valve chamber. The side wall of the valve seat facing away from the through hole is defined as the second side wall, and the sliding member is arranged to move on the second side wall along the axial direction of the valve body.

[0020] Compared with the prior art, in the switching valve provided by the present application, a through hole penetrating the valve body wall plate is opened on the valve body. This through hole is used to accommodate welding material, adding a position for accommodating welding material. After the welding material is heated and melted, the welding material will flow into the space between the valve body and the valve seat, making it easier for the bonding surface between the valve body and the valve seat to be completely filled and covered by the welding material, preventing the occurrence of interrupted welding, improving the welding quality, and enhancing the bonding strength between the valve body and the valve seat, that is, achieving a better bonding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Is a perspective view of the switching valve according to an embodiment of the present application;

[0023] Figure 2 Is the working principle diagram of the switching valve in an embodiment of the present application;

[0024] Figure 3 Is Figure 1 A schematic structural diagram of the valve body of the switching valve shown;

[0025] Figure 4 Is Figure 3 A sectional view of the valve body shown;

[0026] Figure 5 Is Figure 1 A perspective view of the valve seat of the switching valve shown;

[0027] Figure 6 Is Figure 5 A sectional view of the valve seat shown.

[0028] Reference numerals: 1, valve body; 10, valve cavity; 11, inlet pipe hole; 12, connection pipe hole; 13, through hole; 2, valve seat; 21, valve seat hole; 22, first side wall; 221, wall surface; 23, second side wall; 3, sliding member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the specification of the present application are only for illustrative purposes and do not represent the only implementation.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0033] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0034] Please refer to Figures 1 to 6In order to avoid the situation where the joint surface between the valve seat and the valve body is not completely filled and covered with welding material, which causes the weld to break, the present application provides a switching valve that can be used in an air-conditioning system.

[0035] like Figure 1 and Figure 2 As shown, the switching valve includes a valve assembly and a sliding member 3. The valve assembly includes a valve body 1 and a valve seat 2. The interior of the valve body 1 defines a valve cavity 10, and a pipe inlet hole 11 for installing an air inlet pipe and a pipe connecting hole 12 for installing a connecting pipe are provided on the wall plate of the valve body 1. The pipe inlet hole 11 and the pipe connecting hole 12 are both connected to the valve cavity 10. If the switching valve is a three-way valve, a four-way valve or a five-way valve, then there are at least two pipe connecting holes 12, and they are arranged at intervals along the axial direction of the valve body 1. In this application, the three-way valve is mainly used as an example for detailed description, then there are two pipe connecting holes 12.

[0036] like Figure 2 As shown, the valve seat 2 is located in the valve cavity 10, and the valve seat 2 is provided with a valve seat hole 21 connecting the connecting pipe hole 12 and the valve cavity 10 at a position corresponding to the connecting pipe hole 12. The valve body 1 is provided with a through hole 13 for accommodating welding materials at a position corresponding to the valve seat 2, and the through hole 13 penetrates the wall of the valve body 1 along the wall thickness direction of the valve body 1. The aforementioned through hole 13 is a solder hole, and is arranged on the same side as the connecting pipe hole 12. The aforementioned welding material is a solder ring, a welding wire, a solder or a solder paste.

[0037] The above-mentioned through hole setting adds a position for accommodating solder. After the solder is heated and melted, the solder will flow between the valve body and the valve seat, making it easier for the joint surface between the valve body and the valve seat to be completely filled and covered by the solder, preventing the occurrence of broken welds, improving the welding quality, and making the bonding strength between the valve body and the valve seat better, that is, achieving a better bonding effect.

[0038] like Figure 2 As shown, the side wall of the valve seat 2 facing the through hole 13 is defined as the first side wall 22, and the side wall of the valve seat 2 away from the through hole 13 is defined as the second side wall 23. The through hole 13 is isolated from the valve cavity 10 by the first side wall 22. Among them, the portion of the first side wall 22 corresponding to the through hole 13 is a complete wall surface 221. The setting of the above-mentioned complete wall surface 221 allows the molten solder to flow better between the valve body 1 and the valve seat 2 and fill the space between the two, thereby preventing the welding from being broken and improving the welding quality between the valve body 1 and the valve seat 2. In addition, the portion of the first side wall 22 corresponding to the through hole 13 can also be provided with a guide channel for facilitating the solder guide.

[0039] In one embodiment, the through hole 13 is located between two adjacent connection holes 12. In another embodiment, the through hole 13 is arranged beside the two connection holes 12, that is, one of the connection holes 12 is located between the other connection hole 12 and the through hole 13. In order to better avoid the occurrence of broken welding and make the valve seat 2 and the valve body 1 better connected together, the through hole 13 is located exactly in the middle of two adjacent connection holes 12. Then, when the distance between the centers of the two connection holes 12 is 2L, the distance between the center of the through hole 13 and the center of one of the connection holes 12 is L. With such an arrangement, the two connection holes 12 are equidistant from the through hole 13. After the solder in the through hole 13 is heated and melted, the melted solder flows towards the two side connection holes 12, and the melted solder is evenly distributed on both sides of the through hole 13, so that the joint surface between the first side wall 22 of the valve seat 2 and the valve body 1 is completely filled and covered by the solder, enabling the valve body 1 and the valve seat 2 to be connected together, preventing the occurrence of broken welding and improving the welding quality.

[0040] In one embodiment, the inlet pipe hole 11 and the through hole 13 are arranged oppositely. As Figure 4 shown, the inlet pipe hole 11 and the through hole 13 are coaxially arranged, then the center of the through hole 13 and the center of the inlet pipe hole 11 are on the same straight line. In another embodiment, the inlet pipe hole 11 and the through hole 13 can be arranged in a circumferential dislocation along the valve body 1. In addition, the axis of the through hole 13 and the axes of the respective connection holes 12 are in the same plane.

[0041] In one embodiment, the above-mentioned inlet pipe hole 11, through hole 13, and connection hole 12 are all circular holes. The diameter φa of the inlet pipe hole 11 and the diameter φA of the through hole 13 satisfy: φa < φA. Since the inlet pipe hole 11 and the through hole 13 are arranged opposite to each other, when punching the valve body 1 with a punch, the through hole 13 and the inlet pipe hole 11 can be formed in sequence, which is convenient for processing the above-mentioned inlet pipe hole 11 and through hole 13.

[0042] As Figure 4 shown, the diameter φA of the through hole 13 and the diameter φB of the connection hole 12 satisfy: φA ≤ φB. In this way, solder aggregation is avoided and the welding quality is improved. In addition, the above-mentioned through hole 13 and connection hole 12 are not limited to circular holes and can also be of other shapes.

[0043] As Figure 4 and Figure 6 shown, the above-mentioned valve seat hole 21 is also a circular hole, and the distance between the centers of the two valve seat holes 21 is equal to the distance between the centers of the two connection holes 12, such as both being 2L.

[0044] As Figure 1 、 Figure 2 Combined Figure 6As shown, the above-mentioned switching valve further includes a connecting pipe 4. Each connection hole 12 corresponds to a connecting pipe 4. Then, the two connecting pipes 4 are arranged at intervals along the axial direction of the valve body 1. The connection methods of the two connecting pipes 4 with the corresponding connection holes 12 are the same. Hereinafter, one of them will be taken as an example for description. One end of the connecting pipe 4 passes through the corresponding connection hole 12 and is inserted into the corresponding valve seat hole 21. In order to facilitate the connecting pipe 4 to be constrained in the valve seat hole 21 on the corresponding side, the valve seat hole 21 has a hole section 211 with a diameter equal to that of the corresponding connection hole 12, and the above-mentioned connecting pipe 4 is constrained in this hole section 211.

[0045] In addition, the valve body of the present application can be universal with a four-way valve, which improves the versatility of the switching valve. At this time, the through holes 13 and the connection holes 12 have the same shape and size, and the through holes 13 can be used as connection holes. With such a design, during the production process, the valve body can be standardized, the preparation of materials during the production process can be reduced, and the valve bodies of the three-way valve and the four-way valve can be made universal, thereby reducing costs.

[0046] As Figure 2 and Figure 6 shown, the above-mentioned sliding member 3 is located in the valve cavity 10, and the sliding member 3 is arranged to be able to move along the axial direction of the valve body 1 on the second side wall 23, so as to change the direction of fluid movement. The principle of realizing commutation through the movement of the sliding member is the same as that in the prior art, and will not be described in detail in this embodiment.

[0047] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered to be within the scope described in this specification.

[0048] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A valve assembly of a switching valve, characterized in that, The invention comprises a valve body (1) and a valve seat (2), wherein a valve cavity (10) is formed inside the valve body (1), and an inlet hole (11) for installing an air inlet pipe and a connecting pipe hole (12) for installing a connecting pipe are provided on the valve body (1), and both the inlet hole (11) and the connecting pipe hole (12) are connected to the valve cavity (10), and there are at least two connecting pipe holes (12) which are arranged at intervals along the axial direction of the valve body (1), and the valve seat (2) is located in the valve cavity (10), and a valve seat hole (21) is provided on the valve seat (2) at a position corresponding to the connecting pipe hole (12) for connecting the connecting pipe hole (12) and the valve cavity (10), and a through hole (13) for accommodating welding material is provided on the valve body (1) at a position corresponding to the valve seat (2), and the through hole (13) penetrates the valve body (1) along the wall thickness direction of the valve body (1).

2. The valve assembly according to claim 1, wherein The through hole (13) is located between two adjacent connecting pipe holes (12).

3. The valve assembly according to claim 2, wherein, The through hole (13) is located in the middle of two adjacent connecting pipe holes (12).

4. The valve assembly according to claim 1, wherein A side wall of the valve seat (2) facing the through hole (13) is defined as a first side wall (22), and the through hole (13) is isolated from the valve chamber (10) by the first side wall (22).

5. The valve assembly according to claim 4, wherein, The portion of the first side wall (22) corresponding to the through hole (13) is a complete wall surface (221).

6. The valve assembly according to claim 1, characterized in that, The pipe inlet hole (11) and the through hole (13) are coaxially arranged.

7. The valve assembly according to claim 1, characterized in that, The axis of the through hole (13) and the axis of each of the connecting pipe holes (12) are located on the same plane.

8. The valve assembly according to claim 1, wherein There are two connecting pipe holes (12), and the through hole (13) and the connecting pipe holes (12) have the same shape and size.

9. The valve assembly according to claim 1, wherein The through hole (13) is located beside at least two of the connecting pipe holes (12).

10. The valve assembly according to any one of claims 1 to 9, characterized in that, The through hole (13) and the connecting hole (12) are both circular holes, and the diameter φA of the through hole (13) and the diameter φB of the connecting hole (12) satisfy: φA≤φB.

11. The valve assembly according to claim 10, characterized in that, The pipe inlet hole (11) is a circular hole, and the diameter φa of the pipe inlet hole (11) and the diameter φA of the through hole (13) satisfy: φa<φA.

12. A switching valve, comprising a valve assembly, characterized in that, The valve assembly is the valve assembly described in any one of claims 1 to 11, and a sliding member (3) for switching the flow direction of the fluid is also provided in the valve chamber (10), and the side wall of the valve seat (2) facing away from the through hole (13) is defined as the second side wall (23), and the sliding member (3) is arranged to move on the second side wall (23) along the axial direction of the valve body (1).

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