Switching valve

Abstract

The utility model provides a switching valve which comprises a main valve, a second valve, a third valve and a fourth valve. The pilot valve is provided with a second shell, and the second shell is provided with a second valve cavity; the connecting pipe is arranged between the main valve and the pilot valve, the connecting pipe is used for communicating the first valve cavity with the second valve cavity, one end of the connecting pipe is fixedly connected with the side wall of the first shell, the other end of the connecting pipe is fixedly connected with one end of the second shell, the second shell is supported on the first shell through the connecting pipe, and the connecting pipe is a bent pipe. By means of the technical scheme, the problem that in the prior art, assembly of the pilot valve and the main valve is tedious can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of switching valves, in particular to a switching valve. Background Art

[0002] At present, in air-conditioning systems, switching valves are usually used to control the reversing of the refrigerant fluid in the system. The switching valve usually includes a main valve and a pilot valve. The pilot valve can control the pressure direction of the fluid in the main valve so that the main valve can switch between different connection modes to achieve reversing of cooling and heating.

[0003] In the prior art, the pilot valve is typically secured to the main valve via a bracket. The main valve is equipped with multiple connecting pipes to connect the compressor, indoor heat exchanger, and outdoor heat exchanger. The pilot valve, connecting pipes, and main valve are connected via multiple capillary tubes to achieve communication between the pilot valve and the main valve. This conventional connection method requires the use of supporting members such as brackets and connecting members such as capillary tubes to support and connect the pilot valve. This requires a large number of parts, complex connections, and cumbersome assembly procedures. Utility Model Content

[0004] The utility model provides a switching valve to solve the problem of complicated assembly of a pilot valve and a main valve in the prior art.

[0005] The utility model provides a switching valve, which includes: a main valve, having a first shell, the first shell having a first valve cavity; a pilot valve, having a second shell, the second shell having a second valve cavity; a connecting pipe, arranged between the main valve and the pilot valve, the connecting pipe being used to connect the first valve cavity and the second valve cavity, one end of the connecting pipe being fixedly connected to the side wall of the first shell, the other end of the connecting pipe being fixedly connected to one end of the second shell, the second shell being supported on the first shell through the connecting pipe, and the connecting pipe being a curved pipe.

[0006] Furthermore, a D communicating pipe is provided on the main valve, the connecting pipe and the D communicating pipe are arranged side by side, and one end of the connecting pipe communicating with the second shell extends in a direction away from the D communicating pipe.

[0007] Furthermore, the main valve is also provided with an E connecting pipe, an S connecting pipe and a C connecting pipe. The E connecting pipe, the S connecting pipe and the C connecting pipe are arranged at intervals on one side of the first shell along the axial direction of the first shell, and the D connecting pipe is arranged on the other side of the axis of the first shell relative to the E connecting pipe, the S connecting pipe and the C connecting pipe. The first shell is provided with a first connecting port, a second connecting port, a third connecting port, a fourth connecting port and a fifth connecting port. The first connecting port is used to connect the D connecting pipe, the fifth connecting port is used to connect the connecting pipe, the second connecting port, the third connecting port and the fourth connecting port are respectively used to connect the E connecting pipe, the S connecting pipe and the C connecting pipe, the third connecting port is coaxially arranged with the first connecting port, the fifth connecting port is coaxially arranged with the second connecting port, or, coaxially arranged with the fourth connecting port.

[0008] Furthermore, a first plug-in structure is provided between the connecting pipe and the first shell, and the connecting pipe is plug-fitted with the first shell through the first plug-in structure.

[0009] Furthermore, a flange is provided on the outer periphery of the fifth connecting port, and the flange forms a plug-in structure, and the connecting pipe is plug-fitted with the first shell through the flange.

[0010] Furthermore, a second plug-in structure is provided between the connecting pipe and the second shell, and the connecting pipe is plug-fitted with the second shell through the second plug-in structure.

[0011] Furthermore, an end cover is provided at one end of the second shell body connected to the connecting pipe. The end cover has a plug-in slot extending into the second valve cavity, and the connecting pipe is plugged into the plug-in slot.

[0012] Furthermore, the connecting pipe is fixedly connected to the first shell and the second shell by welding.

[0013] Furthermore, a filter is provided between the second valve chamber and the connecting pipe.

[0014] Furthermore, a connecting hole is provided on an end surface of one end of the second housing connected to the connecting pipe, the second valve cavity is communicated with the connecting pipe through the connecting hole, and the filter is provided at the connecting hole.

[0015] Furthermore, the first shell and the second shell are arranged parallel to each other.

[0016] The cam is connected to the first control valve body through the cam, and the cam is connected to the control valve body through the cam. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 Shows a schematic structural diagram of the switching valve provided by the utility model;

[0019] Figure 2 It shows a schematic structural diagram of the first shell provided by the utility model;

[0020] Figure 3 Shows a schematic structural diagram of the second housing provided by the present utility model;

[0021] Figure 4 Shown Figure 1 A partial enlarged view of point A in the middle.

[0022] The above drawings include the following reference numerals:

[0023] 10. Main valve; 11. First housing;

[0024] 101, D connecting pipe; 102, E connecting pipe; 103, S connecting pipe; 104, C connecting pipe;

[0025] 111, first connection port; 112, second connection port; 113, third connection port; 114, fourth connection port; 115, fifth connection port;

[0026] 20. Pilot valve; 21. Second housing; 211. End cover; 212. Connecting hole;

[0027] 30. Connecting pipe;

[0028] 40. Filter element. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1As shown, an embodiment of the present invention provides a switching valve, which includes a main valve 10, a pilot valve 20, and a connecting pipe 30. The main valve 10 has a first housing 11, which has a first valve cavity. The pilot valve 20 has a second housing 21, which has a second valve cavity. The connecting pipe 30 is fixedly disposed between the main valve 10 and the pilot valve 20. The connecting pipe 30 is used to connect the first valve cavity and the second valve cavity. One end of the connecting pipe 30 is fixedly connected to the side wall of the first housing 11, and the other end of the connecting pipe 30 is fixedly connected to one end of the second housing 21. The second housing 21 is supported on the first housing 11 via the connecting pipe 30. The connecting pipe 30 is a curved pipe.

[0031] According to the technical solution provided by the present invention, the switching valve includes a main valve 10, a pilot valve 20, and a connecting pipe 30. The connecting pipe 30 can support the pilot valve 20 to fix the pilot valve 20 on the main valve 10 and realize the connection between the main valve 10 and the pilot valve 20. In addition, the connecting pipe 30 can connect the second valve chamber with the first valve chamber to realize the circulation of fluid. In traditional technical solutions, a capillary tube is usually required to connect the first valve chamber and the second valve chamber. In the present application, the connecting pipe 30 is used to support the pilot valve 20 and also connect the first valve chamber and the second valve chamber. There is no need to set up a separate capillary tube connecting the first valve chamber and the second valve chamber, which reduces the number of parts, reduces production costs, simplifies assembly steps, and improves the overall assembly efficiency of the switching valve. At the same time, the connecting pipe 30 is configured as a curved pipe. After the pilot valve 20 is fixed to the main valve 10, the position of the pilot valve 20 relative to the main valve 10 can be more reasonable, reducing the overall occupied space of the switching valve and providing operating space for installation tools, facilitating the installation of the pilot valve 20.

[0032] Moreover, in the conventional technical solution, the pilot valve 20 needs to be installed in parallel with the main valve 10. In the present application, the second shell 21 and the first shell 11 are arranged in parallel with each other, that is, the connecting pipe 30 forms a 90° elbow structure. Such an arrangement can maintain the installation direction of the pilot valve 20 and the electromagnetic coil, and the installation equipment of the pilot valve 20 and the electromagnetic coil does not need to be redesigned. The air-conditioning system that uses the switching valve as a whole does not need to make matching changes to the layout of the connecting pipe 30, thereby reducing the impact of the replacement of components on the overall air-conditioning system.

[0033] Specifically, the main valve 10 is provided with a D connecting pipe 101, an E connecting pipe 102, an S connecting pipe 103 and a C connecting pipe 104, wherein the D connecting pipe 101 is connected to the air outlet of the compressor, the S connecting pipe 103 is connected to the air inlet of the compressor, the E connecting pipe 102 is connected to the heat exchanger on the indoor side, and the C connecting pipe 104 is connected to the heat exchanger on the outdoor side. The E connecting pipe 102, the S connecting pipe 103 and the C connecting pipe 104 are arranged at intervals on one side of the first shell 11 along the axial direction of the first shell 11, and the D connecting pipe 101 is arranged on the other side of the axis of the first shell 11 relative to the E connecting pipe 102, the S connecting pipe 103 and the C connecting pipe 104. The connecting pipe 30 is arranged side by side with the D connecting pipe 101, and the end of the connecting pipe 30 connected to the first shell 11 extends in a direction away from the D connecting pipe 101. Through the above arrangement, the pilot valve 20 connected to the connecting pipe 30 extends in a direction away from the D connecting pipe 101, which can provide installation space for the electromagnetic coil, facilitate the installation of the electromagnetic coil, prevent the D connecting pipe 101 from affecting the assembly of the electromagnetic coil, and further improve the assembly efficiency.

[0034] Reference Figure 1 and Figure 2 As shown, the first housing 11 is provided with a first connection port 111, a second connection port 112, a third connection port 113, a fourth connection port 114, and a fifth connection port 115. The first connection port 111 is used to connect to the D connection pipe 101, the fifth connection port 115 is used to connect to the connection pipe 30, the second connection port 112, the third connection port 113, and the fourth connection port 114 are respectively used to connect to the E connection pipe 102, the S connection pipe 103, and the C connection pipe 104. The third connection port 113 is coaxial with the first connection port 111, and the fifth connection port 115 is coaxial with the second connection port 112 or the fourth connection port 114. With the above arrangement, when machining the first connection port 111 and the fifth connection port 115, the first connection port 111 can use the same positioning reference as the third connection port 113, and the fifth connection port 115 can use the same positioning reference as the second connection port 112 or the fourth connection port 114, eliminating the need to adjust the positioning reference multiple times, thereby improving the machining efficiency of the first housing 11.

[0035] It is worth noting that the first shell 11 and the second shell 21 can be set to a tubular structure to facilitate the processing and forming of the first shell 11 and the second shell 21; they can also be set to other shapes, which can be adjusted according to actual needs and are not specifically limited in this application.

[0036] Specifically, in the present application, a first plug-in structure is provided between the connecting tube 30 and the first housing 11, through which the connecting tube 30 is plugged into and mated with the first housing 11. The pilot valve 20 and the connecting tube 30 form a cantilever structure, which places high demands on the connection strength between the connecting tube 30 and the first housing 11. The above-described arrangement and the use of the first plug-in structure ensure the connection strength between the connecting tube 30 and the first housing 11, preventing cracking at the connection between the connecting tube 30 and the first housing 11 and ensuring the structural stability of the switching valve.

[0037] In one specific embodiment of the present application, a flange is provided on the outer periphery of the fifth connection port 115, forming a plug-in structure, through which the connection tube 30 plugs into the first housing 11. The provision of the flange disperses stress and reduces stress concentration at the fifth connection port 115, thereby improving the reliability of the connection between the connection tube 30 and the first housing 11, increasing the contact area between the fifth connection port 115 and the plug-in connection tube 30, and improving the stability of the connection. Furthermore, the flange can be formed by expanding or stamping the first housing 11 itself, thereby reducing the manufacturing cost of the first housing 11.

[0038] Optionally, the flange may be directed toward the outside of the first valve cavity or toward the inside of the first valve cavity, as long as the connection strength between the connecting pipe 30 and the first shell 11 can be improved.

[0039] In another specific embodiment of the present application, a boss is provided on the outer periphery of the fifth connection port 115. The boss forms a plug-in structure, and the connection pipe 30 plugs into and engages with the first housing 11 via the boss. The provision of the boss can improve the structural strength of the periphery of the fifth connection port 115, making the connection between the fifth connection port 115 and the connection pipe 30 more secure and less likely to deform or break when subjected to force.

[0040] Furthermore, a second plug-in structure is provided between the connecting tube 30 and the second housing 21, through which the connecting tube 30 engages with the second housing 21. In conventional solutions, the pilot valve 20 is fixed to the side wall of the main valve 10 via a bracket. In this solution, the provision of a second plug-in structure enhances the connection strength between the pilot valve 20 and the connecting tube 30, preventing cracks between the two and ensuring a stable connection between the two.

[0041] In a specific embodiment of the present application, Figure 3As shown, the end of the second housing 21 that connects to the connecting tube 30 is provided with an end cap 211. The end cap 211 has a plug-in slot extending into the second valve cavity, and the connecting tube 30 is plugged into the plug-in slot. Through this arrangement, the connecting tube 30 is inserted into the plug-in slot, which can increase the mating area between the connecting tube 30 and the second housing 21, improve the support provided by the connecting tube 30 for the second housing 21, and make the connection between the second housing 21 and the connecting tube 30 more stable. In addition, the bottom of the plug-in slot also provides a positioning for the connection of the connecting tube 30, facilitating the installation of the connecting tube 30 and improving assembly efficiency.

[0042] In another specific embodiment of the present application, an annular groove may be provided on the inner wall of one end of the connecting pipe 30 that cooperates with the pilot valve 20 , and the second housing 21 is plugged into the annular groove to form a second plug-in structure.

[0043] Specifically, the connecting pipe 30 is fixedly connected to the first housing 11 and the second housing 21 by welding. This welding ensures the connection strength between the first and second housings 11, 21, and the connecting pipe 30, further ensuring the overall structural stability of the switching valve. Alternatively, furnace welding, brazing, or laser welding can be used, as long as it enhances the connection strength.

[0044] In a specific structure of the present application, a filter element 40 is provided between the second valve chamber and the connecting pipe 30. The provision of the filter element 40 can reduce the adhesion of impurities in the first and second valve chambers, reduce the wear of the valve core and other components of the switching valve, and extend the service life of the switching valve.

[0045] like Figure 4 As shown, a connecting hole 212 is provided on the end surface of the second housing 21 at one end connected to the connecting pipe 30. The second valve cavity is connected to the connecting pipe 30 through the connecting hole 212, and the filter element 40 is provided at the connecting hole 212. Through the above arrangement, the filter element 40 can filter the refrigerant fluid flowing through the connecting hole 212, reducing the adhesion of impurities in the first valve cavity and the second valve cavity.

[0046] Optionally, the filter element 40 may be disposed on a side of the connecting hole 212 close to the second valve chamber, or may be disposed on a side of the connecting hole 212 close to the connecting pipe 30 .

[0047] Specifically, the filter element 40 can be made of a metal mesh and is arranged on the second shell 21 by welding or other clamping structures.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0050] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. 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: The switching valve comprises: A main valve (10) having a first housing (11), wherein the first housing (11) has a first valve chamber; A pilot valve (20) having a second housing (21), wherein the second housing (21) has a second valve chamber; A connecting pipe (30) is provided between the main valve (10) and the pilot valve (20), and is used to connect the first valve cavity and the second valve cavity. One end of the connecting pipe (30) is fixedly connected to the side wall of the first shell (11), and the other end of the connecting pipe (30) is fixedly connected to one end of the second shell (21). The second shell (21) is supported on the first shell (11) through the connecting pipe (30). The connecting pipe (30) is a curved pipe.

2. The switching valve according to claim 1, characterized in that A D communicating pipe (101) is provided on the main valve (10), the connecting pipe (30) and the D communicating pipe (101) are arranged side by side, and one end of the connecting pipe (30) communicating with the second housing (21) extends in a direction away from the D communicating pipe (101).

3. The switching valve according to claim 2, characterized in that The main valve (10) is further provided with an E communicating pipe (102), an S communicating pipe (103) and a C communicating pipe (104). The E communicating pipe (102), the S communicating pipe (103) and the C communicating pipe (104) are arranged at intervals on one side of the first shell (11) along the axial direction of the first shell (11). The D communicating pipe (101) is arranged on the other side of the axis of the first shell (11) relative to the E communicating pipe (102), the S communicating pipe (103) and the C communicating pipe (104). The first shell (11) is provided with a first connecting port (111), a second connecting port (112), a third connecting port (113), a fourth connecting port (114). The interface (114) and the fifth connection port (115) are configured such that the first connection port (111) is used to connect the D connecting pipe (101), the fifth connection port (115) is used to connect the connecting pipe (30), the second connection port (112), the third connection port (113) and the fourth connection port (114) are respectively used to connect the E connecting pipe (102), the S connecting pipe (103) and the C connecting pipe (104), the third connection port (113) is coaxially arranged with the first connection port (111), and the fifth connection port (115) is coaxially arranged with the second connection port (112), or coaxially arranged with the fourth connection port (114).

4. The switching valve according to claim 3, characterized in that A first plug-in structure is provided between the connecting pipe (30) and the first shell (11), and the connecting pipe (30) is plug-fitted with the first shell (11) via the first plug-in structure.

5. The switching valve according to claim 4, characterized in that The outer periphery of the fifth connection port (115) is provided with a flange, the flange forming the plug-in structure, and the connecting pipe (30) is plug-fitted with the first shell (11) via the flange.

6. The switching valve according to claim 1, characterized in that A second plug-in structure is provided between the connecting pipe (30) and the second shell (21), and the connecting pipe (30) is plug-fitted with the second shell (21) via the second plug-in structure.

7. The switching valve according to claim 6, characterized in that An end cover (211) is provided at one end of the second housing (21) connected to the connecting pipe (30). The end cover (211) has a plug-in slot extending into the second valve cavity, and the connecting pipe (30) is plugged into the plug-in slot.

8. The switching valve according to claim 1, wherein: The connecting pipe (30) is fixedly connected to the first shell (11) and the second shell (21) by welding.

9. The switching valve according to claim 1, wherein: A filter element (40) is provided between the second valve cavity and the connecting pipe (30).

10. The switching valve according to claim 9, characterized in that A connecting hole (212) is provided on the end surface of one end of the second housing (21) connected to the connecting pipe (30); the second valve cavity is communicated with the connecting pipe (30) through the connecting hole (212); and the filter element (40) is provided at the connecting hole (212).

11. The switching valve according to claim 1, wherein: The first shell (11) and the second shell (21) are arranged parallel to each other.

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