Four-way reversing valve and air conditioning system
By arranging filter structures in the D, E, and C pipes of the four-way reversing valve in the air-conditioning system, the problem of high impurity filtering costs in the four-way reversing valve in the air-conditioning system is solved, the response speed and accuracy are improved, and the cost is reduced. and risk of impurity accumulation.
Patent Information
- Application Number
- CN202421192951.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In existing air conditioning systems, the quad-way reversing valve has high filtration cost, and impurities are prone to accumulate, resulting in the movement of internal parts of the valve chamber, affecting the response speed and accuracy.
Set filter structures in the D, E, and C pipes of the four-way directional valve to avoid setting up filter structures in the S pipe to reduce costs and promote the discharge of impurities.
By setting filter structures in the D, E, and C pipes, it can effectively prevent impurities from entering the main valve, improve the response speed and accuracy of the four-way directional valve, and at the same time reduce the number of filter structures, reduce costs and improve safety performance.
Smart Images
Figure CN222363452U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of multi-way valves, and in particular to a four-way reversing valve and an air conditioning system. Background Art
[0002] The four-way reversing valve is an important part of the air conditioning system, which can control the flow direction of the refrigerant in the air conditioning system pipeline, thereby switching the cooling and heating states of the air conditioning system. In the related art, the four-way reversing valve usually includes a main valve and a pilot valve, wherein the main valve includes a valve body, a D pipe, an E pipe, an S pipe and a C pipe, and the three pipes E pipe, S pipe and C pipe are arranged on both sides of the valve body in the radial direction opposite to the D pipe, and a slider assembly is also arranged in the valve body. The pilot valve drives the movement of the slider assembly in the valve body so that the slider assembly connects different pipes, thereby realizing the switching of the refrigerant flow path.
[0003] At present, in the air-conditioning system, since the D / E / S / C pipes of the four-way reversing valve are all connected to different components in the air-conditioning system, such as the compressor, indoor unit, outdoor unit, etc., and certain impurities may be generated during the operation of the system, the refrigerant will bring some impurities into the valve cavity of the four-way reversing valve when flowing, and the accumulation of impurities will easily hinder the movement of components such as the slider assembly inside the valve cavity, thereby affecting the response speed and accuracy of the four-way valve. The existing conventional solution is to set a filtering structure in each of the four pipes of the four-way reversing valve to reduce the probability of impurities entering the four-way reversing valve. However, since the S pipe of the four-way reversing valve is the outlet pipe of the four-way valve in both the cooling and heating modes, in order to meet the filtering requirements, it is sufficient to set a filtering structure in the inlet pipe. Setting a filtering structure in the S pipe increases the cost, and adding a filtering structure to the S pipe is not conducive to the discharge of impurities mixed in the four-way valve, which may increase the risk of impurity accumulation. Utility Model Content
[0004] Based on this, it is necessary to provide a four-way reversing valve and an air-conditioning system to solve the problem of high impurity filtering cost of the four-way reversing valve when the existing air-conditioning system is running.
[0005] The present application provides a four-way reversing valve, which includes a main valve body, a D-type pipe, an E-type pipe, an S-type pipe and a C-type pipe, wherein the main valve body is provided with a valve cavity, the D-type pipe is connected to one side of the main valve body along its own radial direction, the E-type pipe, the S-type pipe and the C-type pipe are relatively connected to the other side of the main valve body along its own radial direction, and along the axial direction of the main valve body, the E-type pipe, the S-type pipe and the C-type pipe are arranged in sequence; a slider assembly is arranged in the valve cavity, the valve cavity connects the D-type pipe with the E-type pipe, and the slider assembly connects the S-type pipe with the C-type pipe; or the valve cavity connects the D-type pipe with the C-type pipe, and the slider assembly connects the S-type pipe with the E-type pipe, wherein the D-type pipe is an inlet pipe and the S-type pipe is an outlet pipe; the four-way reversing valve also includes a filtering structure, which is installed in the D-type pipe, the E-type pipe and the C-type pipe, and the filtering structure is not arranged in the S-type pipe.
[0006] In one embodiment, the filter structure installed in the D-type pipe is defined as a first filter element, the D-type pipe is provided with a first diameter expansion section, the inner diameter of the first diameter expansion section is larger than the inner diameter of the portion of the D-type pipe connected to the first diameter expansion section, and the first filter element is installed in the first diameter expansion section; and / or, the filter structure installed in the E-type pipe is defined as a second filter element, the E-type pipe is provided with a second diameter expansion section, the inner diameter of the second diameter expansion section is larger than the inner diameter of the portion of the E-type pipe connected to the second diameter expansion section, and the second filter element is installed in the second diameter expansion section; and / or, the filter structure installed in the C-type pipe is defined as a third filter element, the C-type pipe is provided with a third diameter expansion section, the inner diameter of the third diameter expansion section is larger than the inner diameter of the portion of the C-type pipe connected to the third diameter expansion section, and the third filter element is installed in the third diameter expansion section.
[0007] In one embodiment, the first filter element is fixedly connected to the inner wall of the first expanded diameter section by welding, snap-fitting or interference fit; and / or the second filter element is fixedly connected to the inner wall of the second expanded diameter section by welding, snap-fitting or interference fit; and / or the third filter element is fixedly connected to the inner wall of the third expanded diameter section by welding, snap-fitting or interference fit.
[0008] In one of the embodiments, the four-way reversing valve also includes a pilot valve and a D capillary, wherein the pilot valve is arranged on the outer peripheral wall of the main valve body and is connected to the main valve body; the portion of the D connecting pipe located between the filter structure and the valve chamber is defined as a flow section, and the D capillary connects the pilot valve and the flow section.
[0009] In one embodiment, the filtering structure is configured as a filter net.
[0010] In one embodiment, the filtering structure includes a filtering portion and a fixing portion, one end of the filtering portion is connected to the fixing portion, and the other end of the filtering portion is gradually contracted in a direction away from the fixing portion and in a direction close to its own axis.
[0011] In one embodiment, a plurality of filter holes are formed on the filter portion, and the plurality of filter holes are radially arranged on the filter portion.
[0012] In one embodiment, the pore size of the filter hole ranges from 90um to 180um.
[0013] In one embodiment, the axial direction of the filter hole is parallel to or coincides with the axial direction of the filter structure.
[0014] The present application also provides an air-conditioning system, which includes a compressor, an indoor unit, an outdoor unit and the four-way reversing valve described in any one of the above embodiments; when the air-conditioning system is in a cooling state, the outlet of the compressor is connected to the E pipe in sequence through the D pipe, the valve cavity, the C pipe, the outdoor unit and the indoor unit, and the S pipe is connected to the inlet of the compressor; when the air-conditioning system is in a heating state, the outlet of the compressor is connected to the C pipe in sequence through the D pipe, the valve cavity, the E pipe, the indoor unit and the outdoor unit, and the S pipe is connected to the inlet of the compressor.
[0015] Compared with the prior art, the four-way reversing valve and air conditioning system provided by the present application, since the D pipe, E pipe and C pipe can all be used as inlet pipes, the S pipe is the outlet pipe. At this time, by setting a filtering structure in the D pipe, E pipe and C pipe, the refrigerant entering the valve cavity in the cooling or heating operation state can be filtered, thereby preventing impurities from entering the main valve, avoiding the accumulation of impurities to block the pipeline or hinder the movement of the internal parts of the main valve, which is conducive to improving the response speed and accuracy of the four-way reversing valve. At the same time, no filtering structure is set in the S pipe as the outlet pipe of the four-way reversing valve, which can reduce the number of filtering structures set, not only reducing the cost, but also helping the refrigerant to bring some impurities out of the four-way reversing valve, avoiding the accumulation of impurities, thereby further improving the safety performance of the four-way reversing valve. 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 four-way reversing valve according to an embodiment of the present application;
[0018] Figure 2 A cross-sectional view of a four-way reversing valve in a cooling state according to an embodiment of the present application;
[0019] Figure 3 A cross-sectional view of a four-way reversing valve in a heating state according to an embodiment of the present application;
[0020] Figure 4 A schematic diagram of the structure of a filtering structure according to an embodiment of the present application.
[0021] The symbols in the figure mean the following:
[0022] 100, four-way reversing valve; 10, main valve body; 101, valve chamber; 11, D pipe; 111, first diameter expansion section; 112, flow section; 12, E pipe; 121, second diameter expansion section; 13, S pipe; 14, C pipe; 141, third diameter expansion section; 15, slider assembly; 20, filter structure; 201, filter tank; 21, first filter element; 22, second filter element; 23, third filter element; 24, filter section; 241, filter hole; 25, fixing section; 30, pilot valve; 31, D capillary. DETAILED DESCRIPTION
[0023] 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.
[0024] 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.
[0025] 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.
[0026] 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.
[0027] 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.
[0028] See also Figure 1-Figure 4 The present application provides a four-way reversing valve 100, which is used in an air-conditioning system to switch the cooling and heating modes of the air-conditioning system. The four-way reversing valve 100 includes a main valve body 10, a D pipe 11, an E pipe 12, an S pipe 13, a C pipe 14, a slider assembly 15 and a pilot valve 30. The main valve body 10 is provided with a valve cavity 101. The D pipe 11 is connected to one side of the main valve body 10 along its own radial direction. The E pipe 12, the S pipe 13 and the C pipe 14 are relatively connected to the other side of the main valve body 10 along its own radial direction. In addition, along the axial direction of the main valve body 10, the E pipe 12, the S pipe 13 and the C pipe 14 are arranged in sequence.
[0029] Furthermore, the slider assembly 15 is installed in the valve cavity 101, and the pilot valve 30 is arranged on the outer peripheral wall of the main valve body 10 and connected to the main valve body 10. The slider assembly 15 can slide in the valve cavity 101 under the drive of the pilot valve 30, and as the slider assembly 15 slides, the slider assembly 15 can connect different pipes.
[0030] When the air conditioning system is in a cooling state, the valve cavity 101 is connected to the D pipe 11 and the C pipe 14, and the slider assembly 15 is connected to the E pipe 12 and the S pipe 13. At this time, the refrigerant discharged from the outlet of the compressor in the air conditioning system passes through the D pipe 11, the valve cavity 101, the C pipe 14, the outdoor unit and the indoor unit in sequence into the E pipe 12, and finally returns to the compressor through the S pipe 13. In the cooling state, the outdoor unit is used as a condenser and the indoor unit is used as an evaporator.
[0031] When the air conditioning system is in the heating state, the valve cavity 101 is connected to the D pipe 11 and the E pipe 12, and the slider assembly 15 is connected to the C pipe 14 and the S pipe 13. At this time, the refrigerant discharged from the outlet of the compressor in the air conditioning system passes through the D pipe 11, the valve cavity 101, the E pipe 12, the indoor unit and the outdoor unit in sequence into the C pipe 14, and finally returns to the compressor through the S pipe 13. In the heating state, the outdoor unit is used as an evaporator and the indoor unit is used as a condenser.
[0032] It can be understood that, no matter in cooling or heating state, the D pipe 11 is connected to the outlet of the compressor as the inlet pipe of the four-way reversing valve 100, and the S pipe 13 is connected to the inlet of the compressor as the outlet pipe of the four-way reversing valve 100. In cooling state, the E pipe 12 is connected to the outlet of the indoor unit as the inlet pipe of the four-way reversing valve 100, and the C pipe 14 is connected to the inlet of the outdoor unit as the outlet pipe of the four-way reversing valve 100. In heating state, the C pipe 14 is connected to the outlet of the outdoor unit as the inlet pipe of the four-way reversing valve 100, and the E pipe 12 is connected to the inlet of the indoor unit as the outlet pipe of the four-way reversing valve 100.
[0033] That is to say, the D pipe 11, the E pipe 12 and the C pipe 14 can all be used as inlet pipes, and the S pipe 13 is the outlet pipe. Since there may be impurities in the pipes connected to the four-way reversing valve 100 such as the compressor, the indoor unit and the outdoor unit, in order to prevent the impurities from entering the four-way reversing valve 100 through the D pipe 11, the E pipe 12 and the C pipe 14, please refer to Figure 2 and Figure 3 The four-way reversing valve 100 provided in the present application further includes a filter structure 20 , which is installed in the D pipe 11 , the E pipe 12 , and the C pipe 14 , and the filter structure 20 is not provided in the S pipe 13 .
[0034] By setting the filter structure 20 in the D pipe 11, the E pipe 12 and the C pipe 14, the refrigerant entering the valve cavity 101 of the four-way reversing valve 100 in the cooling or heating operation state can be filtered, thereby preventing impurities from entering the main valve, avoiding the accumulation of impurities to block the pipeline or hinder the movement of the internal parts of the main valve, which is conducive to improving the response speed and accuracy of the four-way reversing valve 100. At the same time, the filter structure 20 is not set in the S pipe 13 as the outlet pipe of the four-way reversing valve 100, which can reduce the number of filter structures 20, not only reducing the cost, but also helping the refrigerant to take some impurities out of the four-way reversing valve 100, avoiding the accumulation of impurities, thereby further improving the safety performance of the four-way reversing valve 100.
[0035] In one embodiment, if Figure 2 and Figure 3 As shown, the filtering structure 20 installed in the D-type pipe 11 is defined as the first filter element 21. The D-type pipe 11 is provided with a first diameter expansion section 111. The inner diameter of the first diameter expansion section 111 is larger than the inner diameter of the portion of the D-type pipe 11 connected to the first diameter expansion section 111. The first filter element 21 is installed in the first diameter expansion section 111. In this way, the provision of the first diameter expansion section 111 facilitates the installation of the first filter element 21, and the first diameter expansion section 111 can accommodate some impurities, thereby reducing the probability of impurities blocking the first filter element 21.
[0036] Furthermore, in one embodiment, the first filter element 21 is fixedly connected to the inner wall of the first expanded diameter section 111 by any one of welding, clamping or interference fit, and the installation of the first filter element 21 is achieved by selecting a suitable connection method according to actual needs, which can further enhance the connection strength between the first filter element 21 and the first expanded diameter section 111, thereby ensuring the filtering effect of the first filter element 21.
[0037] In one embodiment, if Figure 2 and Figure 3 As shown, the filtering structure 20 installed in the E-tube 12 is defined as the second filter element 22, the E-tube 12 is provided with a second diameter expansion section 121, the inner diameter of the second diameter expansion section 121 is larger than the inner diameter of the portion of the E-tube 12 connected to the second diameter expansion section 121, and the second filter element 22 is installed in the second diameter expansion section 121. In this way, the provision of the second diameter expansion section 121 facilitates the installation of the second filter element 22, and the second diameter expansion section 121 can accommodate some impurities, reducing the probability of impurities blocking the second filter element 22.
[0038] Furthermore, in one embodiment, the second filter element 22 is fixedly connected to the inner wall of the second expanded diameter section 121 by welding, snap-fitting or interference fit. The installation of the second filter element 22 is achieved by selecting a suitable connection method according to actual needs, which can further enhance the connection strength between the second filter element 22 and the second expanded diameter section 121, thereby ensuring the filtering effect of the second filter element 22.
[0039] In one embodiment, if Figure 2 and Figure 3 As shown, the filter structure 20 installed in the C-tube 14 is defined as the third filter element 23, the C-tube 14 is provided with a third diameter expansion section 141, the inner diameter of the third diameter expansion section 141 is larger than the inner diameter of the portion of the C-tube 14 connected to the third diameter expansion section 141, and the third filter element 23 is installed in the third diameter expansion section 141. In this way, the provision of the third diameter expansion section 141 facilitates the installation of the third filter element 23, and the third diameter expansion section 141 can accommodate some impurities, thereby reducing the probability of impurities blocking the third filter element 23.
[0040] Furthermore, in one embodiment, the third filter element 23 and the inner wall of the third expanded diameter section 141 are fixedly connected by any one of welding, snap-fitting or interference fit, and the installation of the third filter element 23 is achieved by selecting a suitable connection method according to actual needs, which can further enhance the connection strength between the third filter element 23 and the third expanded diameter section 141, thereby ensuring the filtering effect of the third filter element 23.
[0041] In one embodiment, if Figure 4 As shown, the filter structure 20 is configured as a filter net. In this way, the filter structure 20 has a simple structure and can reduce the cost of the filter structure 20.
[0042] Further, in one embodiment, if Figure 4 As shown, the filter structure 20 includes a filter portion 24 and a fixing portion 25. One end of the filter portion 24 is connected to the fixing portion 25, and the other end of the filter portion 24 is gradually contracted in a direction away from the fixing portion 25 and toward its own axis.
[0043] It is understandable that the fixing portion 25 is used to fix the filter structure 20. Here, taking the connection of the filter structure 20 to the first expanded diameter section 111 on the D pipe 11 as an example, the outer wall of the fixing portion 25 can fit with the inner wall of the first expanded diameter section 111, thereby increasing the contact area and improving the connection strength. The connection of the filter structure 20 to the E pipe 12 and the C pipe 14 is similar, and no further details will be given here. The filter portion 24 is set to shrink in the direction away from the fixing portion 25, which not only ensures a larger filtering area, but also reduces the resistance to the refrigerant through the curved surface, which is conducive to the smooth circulation of the refrigerant.
[0044] Specifically, the fixing portion 25 is arranged in a ring shape, and the filtering portion 24 is arranged in a hemispherical shape.
[0045] Furthermore, in one embodiment, the filter portion 24 and the fixing portion 25 are surrounded to form a filter groove 201, and the opening direction of the filter groove 201 is opposite to the inflow direction of the refrigerant. In this way, when the refrigerant impacts the filter structure 20, the filter portion 24 of the filter structure 20 is not easy to be dented and deformed, thereby effectively ensuring the filtering area of the filter structure 20 and greatly improving the filtering effect of the filter structure 20.
[0046] In one embodiment, the filter portion 24 and the fixing portion 25 are integrally formed, so as to improve the overall structural strength of the filter structure 20 and further reduce the probability of deformation of the filter structure 20 .
[0047] In one embodiment, a plurality of filter holes 241 are formed on the filter portion 24, and the plurality of filter holes 241 are radially arranged on the filter portion 24. In this way, the filter portion 24 filters more evenly and has a better filtering effect.
[0048] Furthermore, in one embodiment, the pore size of the filter hole 241 ranges from 90um to 180um. If the pore size of the filter hole 241 is too large, the filtering effect is not ideal. If the pore size of the filter hole 241 is too small, it will produce a large resistance to the flow of the refrigerant, which is not conducive to the subsequent heat exchange of the refrigerant.
[0049] Exemplarily, the pore size of the filter hole 241 can be set to 90um, 125um, 150um, 180um, etc., and can be reasonably set according to actual needs.
[0050] In one embodiment, the axial direction of the filter hole 241 is parallel to or coincides with the axial direction of the filter structure 20 to reduce the flow resistance of the refrigerant, thereby ensuring the flow rate of the refrigerant.
[0051] In one embodiment, if Figure 1-Figure 3 As shown, the four-way reversing valve 100 also includes a D capillary 31, which is an inlet pipe for the refrigerant to enter the pilot valve 30. Further, the portion of the D connecting pipe 11 between the filter structure 20 and the valve cavity 101 is defined as a flow section 112, and the two ends of the D capillary 31 are connected to the pilot valve 30 and the flow section 112 respectively.
[0052] Since the refrigerant is filtered by the first filter element 21 when circulating in the D-connecting pipe 11, impurities are limited to the position before the first filter element 21. Therefore, there are no impurities in the position of the D-connecting pipe 11 after the first filter element 21, that is, in the circulation section 112. Based on this, the circulation section 112 and the pilot valve 30 are connected through the D capillary tube 31, which can also ensure that there are no impurities in the refrigerant entering the pilot valve 30, so there is no need to set a filter screen and other structures in the D capillary tube 31, which greatly reduces the difficulty of setting and ensures the normal operation of the pilot valve 30.
[0053] The present application also provides an air conditioning system, which includes a compressor, an indoor unit, an outdoor unit, and a four-way reversing valve 100 according to any one of the above embodiments.
[0054] When the air conditioning system is in cooling state, the outlet of the compressor is connected to the E pipe 12 through the D pipe 11, the valve chamber 101, the C pipe 14, the outdoor unit and the indoor unit in sequence, and the S pipe 13 is connected to the inlet of the compressor.
[0055] When the air conditioning system is in heating state, the outlet of the compressor is connected to the C pipe 14 through the D pipe 11, the valve chamber 101, the E pipe 12, the indoor unit and the outdoor unit in sequence, and the S pipe 13 is connected to the inlet of the compressor.
[0056] 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.
[0057] 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 four-way reversing valve, comprising a main valve body (10), a D pipe (11), an E pipe (12), an S pipe (13) and a C pipe (14), wherein the main valve body (10) is provided with a valve cavity (101), the D pipe (11) is connected to one side of the main valve body (10) along its own radial direction, the E pipe (12), the S pipe (13) and the C pipe (14) are relatively connected to the other side of the main valve body (10) along its own radial direction, and along the axial direction of the main valve body (10), the E pipe (12), the S pipe (13) and the C pipe (14) are arranged in sequence; A slider assembly (15) is arranged in the valve cavity (101), the valve cavity (101) is connected to the D-connecting pipe (11) and the E-connecting pipe (12), and the slider assembly (15) is connected to the S-connecting pipe (13) and the C-connecting pipe (14); or the valve cavity (101) is connected to the D-connecting pipe (11) and the C-connecting pipe (14), and the slider assembly (15) is connected to the S-connecting pipe (13) and the E-connecting pipe (12), wherein the D-connecting pipe (11) is an inlet pipe and the S-connecting pipe (13) is an outlet pipe; It is characterized in that The four-way reversing valve further comprises a filtering structure (20), wherein the filtering structure (20) is installed in the D connecting pipe (11), the E connecting pipe (12) and the C connecting pipe (14), and the filtering structure (20) is not arranged in the S connecting pipe (13).
2. The four-way reversing valve according to claim 1, characterized in that: The filtering structure (20) installed in the D-type pipe (11) is defined as a first filtering element (21); the D-type pipe (11) is provided with a first diameter-enlarged section (111); the inner diameter of the first diameter-enlarged section (111) is larger than the inner diameter of a portion of the D-type pipe (11) connected to the first diameter-enlarged section (111); and the first filtering element (21) is installed in the first diameter-enlarged section (111); and / or, the filtering structure (20) installed in the E-type pipe (12) is defined as a second filtering element (22), the E-type pipe (12) is provided with a second diameter-enlarged section (121), the inner diameter of the second diameter-enlarged section (121) is larger than the inner diameter of a portion of the E-type pipe (12) connected to the second diameter-enlarged section (121), and the second filtering element (22) is installed in the second diameter-enlarged section (121); And / or, the filtering structure (20) installed in the C-tube (14) is defined as a third filter element (23), the C-tube (14) is provided with a third diameter expansion section (141), the inner diameter of the third diameter expansion section (141) is larger than the inner diameter of a portion of the C-tube (14) connected to the third diameter expansion section (141), and the third filter element (23) is installed in the third diameter expansion section (141).
3. The four-way reversing valve according to claim 2, characterized in that: The first filter element (21) is fixedly connected to the inner wall of the first diameter-enlarged section (111) by any one of welding, clamping or interference fit; And / or, the second filter element (22) is fixedly connected to the inner wall of the second diameter-enlarged section (121) by any one of welding, clamping or interference fit; And / or, the third filter element (23) is fixedly connected to the inner wall of the third diameter-enlarged section (141) by any one of welding, clamping or interference fit.
4. The four-way reversing valve according to any one of claims 1 to 3, characterized in that: The four-way reversing valve further comprises a pilot valve (30) and a D capillary (31); the pilot valve (30) is arranged on the outer peripheral wall of the main valve body (10) and is connected to the main valve body (10); The portion of the D-type pipe (11) located between the filter structure (20) and the valve chamber (101) is defined as a flow section (112), and the D-type capillary tube (31) connects the pilot valve (30) and the flow section (112).
5. The four-way reversing valve according to any one of claims 1 to 3, characterized in that: The filtering structure (20) is configured as a filtering net.
6. The four-way reversing valve according to any one of claims 1 to 3, characterized in that: The filtering structure (20) comprises a filtering portion (24) and a fixing portion (25); one end of the filtering portion (24) is connected to the fixing portion (25), and the other end is gradually contracted in a direction away from the fixing portion (25) and in a direction close to its own axis.
7. The four-way reversing valve according to claim 6, characterized in that: The filter portion (24) is provided with a plurality of filter holes (241), and the plurality of filter holes (241) are radially arranged on the filter portion (24).
8. The four-way reversing valve according to claim 7, characterized in that: The pore size of the filter hole (241) ranges from 90 um to 180 um.
9. The four-way reversing valve according to claim 7, characterized in that: The axial direction of the filter hole (241) is parallel to or coincides with the axial direction of the filter structure (20).
10. An air conditioning system, characterized in that: It comprises a compressor, an indoor unit, an outdoor unit and a four-way reversing valve as claimed in any one of claims 1 to 9; When the air conditioning system is in a cooling state, the outlet of the compressor is connected to the E pipe (12) through the D pipe (11), the valve chamber (101), the C pipe (14), the outdoor unit and the indoor unit in sequence, and the S pipe (13) is connected to the inlet of the compressor; When the air-conditioning system is in a heating state, the outlet of the compressor is connected to the C pipe (14) through the D pipe (11), the valve chamber (101), the E pipe (12), the indoor unit and the outdoor unit in sequence, and the S pipe (13) is connected to the inlet of the compressor.