Switching valve

Abstract

The utility model provides a switching valve. The switching valve comprises a main valve and a pilot valve. Wherein a mounting hole is formed in the side wall of the main valve, and the hole wall of the mounting hole extends out of the main valve to form a flange. The pilot valve comprises a valve pipe, the valve pipe comprises a pipe body and a mounting end which are connected with each other, the diameter of the mounting end is smaller than that of the pipe body, the mounting end extends into the mounting hole and is fixedly connected with the flange, the mounting end is provided with an end wall, the end wall is provided with a runner hole, and the runner hole is communicated with the inner cavity of the main valve.

Description

Technical Field

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

[0002] A switching valve, such as a four-way valve, is used to change the direction of fluid flow, thereby achieving switching between cooling and heating modes. The switching valve mainly includes a main valve, a pilot valve, a connecting pipe, a capillary tube and other structures. As for the connection method of the pilot valve and the main valve, the pilot valve and the main valve were previously connected through a specially set bracket, that is, the bracket was installed on the main valve, and the pilot valve was installed on the bracket, and the pilot valve and the main valve were separated. This solution has many parts and is relatively costly. With the development of technology, the bracket was eliminated and the pilot valve and the main valve were directly connected. However, after the pilot valve and the main valve are connected, since the pilot valve is long, it is only welded at the contact point between the pilot valve and the main valve. During use, the pilot valve is easily misaligned, resulting in unsealed contact between the pilot valve and the main valve, causing fluid leakage and affecting the normal operation of the switching valve. Utility Model Content

[0003] The main purpose of the present application is to overcome at least one of the defects of the above-mentioned prior art and to provide a switching valve in which the pilot valve and the main valve are directly connected, the connection is firm and reliable, and liquid leakage is avoided as much as possible.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] According to one aspect of the present application, a switching valve is provided, comprising a main valve and a pilot valve. A mounting hole is formed in a side wall of the main valve, the wall of the mounting hole extending outward from the main valve to form a flange. The pilot valve comprises a valve tube, comprising a tube body and a mounting end connected to each other. The mounting end has a diameter smaller than that of the tube body, the mounting end extending into the mounting hole and fixedly connected to the flange. The mounting end has an end wall with a flow channel hole, which communicates with the inner cavity of the main valve.

[0006] According to one embodiment of the present application, there is a space between the end surface of the flange and the valve tube, and the space is used to set the first welding ring.

[0007] According to one embodiment of the present application, the mounting end has an end side wall connected to the end wall, the height of the flange is defined as H, the thickness of the side wall of the main valve is T, the height of the mounting end is h, the thickness of the end side wall of the mounting end is t, and the diameter of the welding wire of the first welding ring is a, then: 3t≤ha≤H+T.

[0008] According to one embodiment of the present application, the tube body and the mounting end are an integral structure.

[0009] According to one embodiment of the present application, the tube body and the mounting end are separate structures.

[0010] According to one embodiment of the present application, the valve tube further includes a sleeve, one end of the sleeve has an annular protrusion extending toward the interior of the sleeve, the annular protrusion is connected to the mounting end, and the tube body extends into the other end of the sleeve and is fixedly connected to the sleeve.

[0011] According to one embodiment of the present application, the tube body and the sleeve are connected by welding, and the end of the sleeve away from the mounting end is used to set a second welding ring.

[0012] According to one embodiment of the present application, the tube body abuts against the annular ridge.

[0013] According to one embodiment of the present application, the sleeve and the mounting end are an integral structure.

[0014] According to one embodiment of the present application, a filter element is further included. The filter element is arranged on a side of the end wall facing the tube body and blocks the flow channel hole.

[0015] From the above technical solution, it can be seen that the advantages and positive effects of the switching valve proposed in this application are:

[0016] The switching valve proposed in the present application is provided with a flange on the side wall of the main valve, and the flange forms a mounting hole for the pilot valve on the main valve. The valve tube of the pilot valve is provided with a mounting end with a diameter smaller than the diameter of the tube body. The mounting end extends into the mounting hole and is fixedly connected to the flange, which can realize a reliable connection between the pilot valve and the main valve, greatly reducing the risk of fluid leakage, and does not require the provision of brackets, reinforcements or other structures other than the main valve and the pilot valve. It has a simple structure, few parts, high reliability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The various objects, features, and advantages of the present application will become more apparent by considering the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present application and are not necessarily drawn to scale. In the drawings, the same reference numerals always indicate the same or similar parts.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a switching valve of the present application.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the pilot valve of the present application.

[0020] Figure 3 yes Figure 2 main view.

[0021] Figure 4 yes Figure 3 AA section view.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the main valve of this application.

[0023] Figure 6 yes Figure 5 main view.

[0024] Figure 7 It is a schematic diagram of the first welding ring of this application.

[0025] Figure 8 It is a structural schematic diagram of another embodiment of the switching valve of the present application.

[0026] Figure 9 yes Figure 8 A three-dimensional schematic diagram showing an integrated structure of the sleeve and the mounting end in the embodiment.

[0027] Figure 10 It is a structural diagram of the filter element of this application.

[0028] Figure 11 It is a schematic diagram of the overall connection circuit of the switching valve of the present application.

[0029] The following are the descriptions of the reference numerals:

[0030] 1, 2, 3. Capillary;

[0031] 4. D-connector of the main valve;

[0032] 5. E-connection of the main valve;

[0033] 6. C connection of the main valve;

[0034] 7. S-type connection of the main valve;

[0035] 10. Main valve;

[0036] 20. Pilot valve;

[0037] 21. Valve pipe;

[0038] 30. First welding ring;

[0039] 40. Casing;

[0040] 101. Side wall;

[0041] 102. Flanging;

[0042] 103. Mounting hole;

[0043] 104. Inner cavity;

[0044] 201. Space;

[0045] 202. Opening for connecting capillary tube;

[0046] 210. Pipe body;

[0047] 212. Installation end;

[0048] 401. Annular ridge;

[0049] 2121. End wall;

[0050] 2122. Flow channel hole;

[0051] 2123. End side wall;

[0052] 50.Filter element. DETAILED DESCRIPTION

[0053] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0054] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0055] Relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in a figure is turned over, the element described as being "lower" or "bottom" of other elements will be oriented "upper" or "top" of the other elements. Thus, the exemplary term "lower" can include both "lower" and "top" orientations, and the term "bottom" can include both "bottom" and "top" orientations, depending on the particular orientation of the figure. Similarly, if the device in a figure is turned over, the element described as being "lower" or "bottom" of other elements will be oriented as being "upper" or "top" of the other elements. Thus, the exemplary terms "bottom" or "below" can include both "upper" and "lower" orientations.

[0056] like Figures 1 to 6As shown, the switching valve of the present application includes a main valve 10 and a pilot valve 20. A mounting hole 103 is formed in the side wall 101 of the main valve 10. The hole wall of the mounting hole 103 extends outward from the main valve to form a flange 102. The pilot valve 20 includes a valve tube 21. The valve tube 21 includes a tube body 210 and a mounting end 212 that are interconnected. The diameter of the mounting end 212 is smaller than that of the tube body 210. The mounting end 212 extends into the mounting hole 103 and is fixedly connected to the flange 102. The mounting end 212 has an end wall 2121, which has a flow channel hole 2122. The flow channel hole 2122 is connected to the inner cavity 104 of the main valve 10.

[0057] In the switching valve of the present application, the pilot valve 20 and the main valve 10 are directly connected, and the valve tube 21 of the pilot valve 20 is provided with a mounting end 212. The mounting end 212 extends into the mounting hole 103 formed by the flange 102 on the side wall 101 of the main valve 10 for installation. The connection is firm, tight and reliable, and does not require intermediate parts such as brackets or reinforcements. The structure is simple, which can prevent fluid leakage and avoid the pilot valve 20 from shifting during use. The mounting end 212 and the flange 102 can be connected by welding. The valve tube 21 of the pilot valve 20 and the side wall 101 of the main valve 10 can both be made of stainless steel, which has high strength and is easy to weld.

[0058] In this embodiment, the mounting end 212 has an end sidewall 2123 connected to the end wall 2121. The height of the flange 102 is defined as H, the thickness of the sidewall 101 of the main valve 10 is defined as T, the height of the mounting end 212 is defined as h, the thickness of the end sidewall 2123 of the mounting end 212 is defined as t, and the diameter of the welding wire of the first welding ring 30 is defined as a. The following relationship is established: 3t≤ha≤H+T. The relationship ha≤H+T prevents the mounting end 212 of the valve tube 21 of the pilot valve 20 from protruding into the inner sidewall 101 of the main valve 10, thereby obstructing the fluid in the main valve 10 and hindering fluid flow, hindering rapid fluid channel switching. The relationship 3t≤ha ensures that the mounting end 212 of the valve tube 21 protrudes sufficiently into the flange 102 of the sidewall 101 of the main valve 10, thereby strengthening the connection between the main valve 10 and the pilot valve 20 and improving the reliability of the switching valve.

[0059] In this embodiment, the tube body 210 and the mounting end 212 are an integral structure. The integral structure is easy to manufacture, has a simple process, and is low in cost, and only requires welding the mounting end 212 and the flange 102.

[0060] In this embodiment, see Figure 1 and Figure 7 There is a space 201 between the end of the flange 102 and the valve tube 21, and the space 201 is used to set the first welding ring 30. The first welding ring 30 is set in the space 201 between the end surface of the flange 102 and the valve tube 21, which can firmly weld the flange 102 and the valve tube 21 to prevent liquid leakage.

[0061] In this embodiment, the switching valve of the present application further includes a filter element 50. The filter element 50 is disposed on the side of the end wall 2121 facing the tube body 210 and blocks the flow channel hole 2122. The filter element 50 filters the fluid flowing into the flow channel hole 2122, preventing impurities from entering the pilot valve 20 and thus preventing impurities from affecting the normal operation of the pilot valve 20. The filter element 50 is disposed on the side of the end wall 2121 facing the pilot valve 20. In other embodiments, the filter element 50 may also be disposed on the side of the end wall 2121 facing the main valve 10. The filter element 50 may be installed by welding. Figure 10 The structure of the filter element 50 of the present application is shown, wherein the filter element 50 is a circular sheet-shaped filter mesh.

[0062] Figure 8 Another embodiment of the switching valve of the present application is shown. Figures 1 to 7 Therefore, in the following description of the switching valve of the other embodiment, the switching valve of the other embodiment will not be repeated. Figures 1 to 7 In addition, Figures 1 to 7 The same reference numerals are used for the same structures as those of the switching valves described in the embodiment of FIG. Figures 1 to 7 The differences between the switching valves of the embodiments are described below.

[0063] like Figure 8 As shown, in another embodiment of the switching valve of the present application, the pipe body 210 and the mounting end 212 are split structures. The split structure allows designers to choose different materials for the pipe body 210 and the mounting end 212 according to actual needs.

[0064] In this embodiment, the valve tube 21 further includes a sleeve 40. One end of the sleeve 40 has an annular flange 401 extending into the interior of the sleeve 40. The annular flange 401 is connected to the mounting end 212. The tube body 210 extends into the other end of the sleeve 40 and is fixedly connected to the sleeve 40. The provision of the sleeve 40 enables the tube body 210 to be fixedly connected to the mounting end 212. The insertion and fixed connection of the tube body 210 into the sleeve 40 enhances the sealing performance of the connection between the pilot valve 20 and the main valve 10, thereby preventing fluid leakage.

[0065] In this embodiment, the tube body 210 and the sleeve 40 are welded together. A second welding ring (not shown) is provided at the end of the sleeve 40 away from the mounting end 212. The use of the second welding ring to weld the tube body 210 and the sleeve 40 together provides a good seal, a secure and reliable connection, and a longer service life of the switching valve.

[0066] In this embodiment, the tube body 210 abuts against the annular ridge 401. The abutment between the tube body 210 and the annular ridge 401 can make the fluid flow path smooth, and at the same time make the connection length between the tube body 210 and the sleeve 40 longer, improve the connection firmness and stability, and prevent the tube body 210 from tilting or deflecting.

[0067] In this embodiment, if Figure 9 As shown, the sleeve 40 and the mounting end 212 are an integral structure. The integral structure is easy to manufacture and has a simple process.

[0068] Figure 11 The overall connection circuit of the switching valve of the present application is shown, wherein the pilot valve 20 is connected to capillaries 1, 2, and 3 through the capillary opening 202. Capillary 1 is connected to the right end of the main valve, capillary 2 is connected to the S pipe 7 of the main valve, and capillary 3 is connected to the left end of the main valve. After the fluid enters the D pipe 4 of the main valve, the fluid flows into the pilot valve 20 through the flow channel hole 2122 on the mounting end 212 of the pilot valve 20, and then flows into the right end of the main valve 10 through the capillary 1, thereby pushing the valve core of the main valve to move leftward, as shown in FIG. Figure 11 As shown, the D pipe 4 of the main valve is connected to the C pipe 6 of the main valve, and the E pipe 5 of the main valve is connected to the S pipe 7 of the main valve. Alternatively, after the fluid enters the D pipe 4 of the main valve, the fluid flows into the pilot valve 20 through the flow channel hole 2122 on the mounting end 212 of the pilot valve 20, and then flows into the left end of the main valve 10 through the capillary tube 3, thereby pushing the valve core of the main valve to move rightward, so that the D pipe 4 of the main valve is connected to the E pipe 5 of the main valve, and the C pipe 6 of the main valve is connected to the S pipe 7 of the main valve.

[0069] In this exemplary embodiment, the switching valve proposed in this application is described using a four-way valve as an example. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this application to other types of valves. These modifications remain within the scope of the principles of the switching valve proposed in this application.

[0070] It should be noted that the switching valves shown in the drawings and described in this specification are only a few examples of the many types of switching valves that can employ the principles of the present application. It should be clearly understood that the principles of the present application are in no way limited to any details or any components of the switching valves shown in the drawings or described in this specification.

[0071] In summary, the switching valve proposed in the present application includes a main valve and a pilot valve. The side wall of the main valve has a flange extending toward the outside of the side wall to form a mounting hole. The pilot valve includes a valve tube, which includes a tube body and a mounting end that are interconnected. The diameter of the mounting end is smaller than the diameter of the tube body. The mounting end extends into the mounting hole and is fixedly connected to the flange. The mounting end has an end wall, and the end wall has a flow channel hole. The flow channel hole is connected to the inner cavity of the main valve. Reliable connection between the pilot valve and the main valve can be achieved, greatly reducing the risk of fluid leakage, and no other structures other than the main valve and the pilot valve, such as brackets or reinforcements, are required. The structure is simple, the number of parts is small, and the reliability is high.

[0072] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0073] In the exemplary embodiments described above, the relays proposed in this application are described using an example of an electronically controlled device. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments to apply the designs of this application to other types of devices, and such modifications remain within the scope of the principles of the relays proposed in this application.

[0074] It should be noted that the relays shown in the drawings and described in this specification are only a few examples of the many types of relays that can employ the principles of the present application. It should be clearly understood that the principles of the present application are in no way limited to any details or any components of the relays shown in the drawings or described in this specification.

[0075] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0076] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the application embodiments.

[0077] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0078] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A switching valve, characterized in that: include: A main valve, wherein a mounting hole is formed on a side wall of the main valve, and a hole wall of the mounting hole extends outward from the main valve to form a flange; A pilot valve, the pilot valve includes a valve tube, the valve tube includes a tube body and a mounting end connected to each other, the diameter of the mounting end is smaller than the diameter of the tube body, the mounting end extends into the mounting hole and is fixedly connected to the flange, the mounting end has an end wall, the end wall has a flow channel hole, and the flow channel hole is connected to the inner cavity of the main valve.

2. The switching valve according to claim 1, wherein: There is a space between the end surface of the flange and the valve tube, and the space is used to arrange a first welding ring.

3. The switching valve according to claim 2, wherein: The mounting end has an end side wall connected to the end wall, and the height of the flange is defined as H, the thickness of the side wall of the main valve is defined as T, the height of the mounting end is defined as h, the thickness of the end side wall of the mounting end is defined as t, and the diameter of the welding wire of the first welding ring is defined as a, then: 3t≤ha≤H+T.

4. The switching valve according to any one of claims 1 to 3, characterized in that: The tube body and the mounting end are an integrated structure.

5. The switching valve according to any one of claims 1 to 3, characterized in that: The tube body and the mounting end are separate structures.

6. The switching valve according to claim 5, wherein: The valve tube further comprises a sleeve, one end of which has an annular ridge extending toward the interior of the sleeve, the annular ridge being connected to the mounting end, and the tube body extending into the other end of the sleeve and being fixedly connected to the sleeve.

7. The switching valve according to claim 6, wherein: The tube body and the sleeve are connected by welding, and the end of the sleeve away from the mounting end is used to set a second welding ring.

8. The switching valve according to claim 6, wherein: The tube body abuts against the annular convex edge.

9. The switching valve according to any one of claims 6 to 8, characterized in that: The sleeve and the mounting end are an integrated structure.

10. The switching valve according to any one of claims 1 to 3 and 6 to 8, characterized in that: It also includes a filter element, which is arranged on a side of the end wall facing the tube body and blocks the flow channel hole.

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