Directional control valve and air conditioning system

Abstract

A directional control valve (100) and an air conditioning system (200). The directional control valve (100) comprises a valve body (10), a valve core (20), a partition plate (30), a first connecting pipe (40) and a second connecting pipe (50), wherein the partition plate (30) is disposed in the valve body (10) and divides the inner space of the valve body (10) into a high-pressure cavity (101) and a balance cavity (102), the high-pressure cavity (101) and the balance cavity (102) being in communication with each other; the valve core (20) is disposed in the high-pressure cavity (101); and one end of the valve core (20) is rotatably connected to the valve body (10), and the other end thereof movably abuts against the partition plate (30) and can selectively communicate with the first connecting pipe (40) or the second connecting pipe (50).

Description

Reversing valve and air conditioning system

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202411126788.0, filed on August 15, 2024, entitled “Reversing valve and air conditioning system”, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of fluid control technology, in particular to a reversing valve and an air conditioning system. BACKGROUND

[0004] The reversing valve is an important component in the air conditioning system, which includes a valve body, a valve cover and a valve core. The valve cover is connected to one end of the valve body, and the valve core is arranged in the valve body and connected to the valve body at one end and abuts against the valve cover at the other end. The valve core can rotate relative to the valve body to connect different flow ports on the valve cover, so as to switch the flow direction of the refrigerant and realize the conversion between cooling and heating modes.

[0005] However, since the valve body flows high-pressure medium and the valve core flows low-pressure medium, the high-pressure medium will exert a large force on the valve cover during the operation of the reversing valve, causing the valve cover to deform under stress. Therefore, when the valve core rotates on the valve cover to switch the flow ports, a gap will be generated between the valve core and the surface of the valve cover, resulting in internal leakage of the medium between the valve core channel and the valve body cavity, which reduces the performance of the reversing valve. SUMMARY

[0006] Therefore, it is necessary to provide a reversing valve and an air conditioning system to solve the problem that the existing reversing valve is prone to poor cooperation between the valve cover and the valve core under the action of high-pressure medium.

[0007] The present application provides a reversing valve, which includes a valve body, a valve core, a partition plate, a first connecting pipe and a second connecting pipe. The partition plate is arranged in the valve body and divides the internal space of the valve body into a high-pressure cavity and a balance cavity, and the high-pressure cavity and the balance cavity are in communication with each other. The valve core is arranged in the high-pressure cavity, and one end of the valve core is rotationally connected to the valve body, and the other end of the valve core abuts against the partition plate and selectively communicates with the first connecting pipe or the second connecting pipe.

[0008] In one embodiment, a first channel is formed on the partition plate, and the first channel respectively communicates with the high-pressure cavity and the balance cavity; and / or, a second channel is formed on the valve body, and the second channel respectively communicates with the high-pressure cavity and the balance cavity.

[0009] In one of the embodiments, the valve body comprises a main body part and a cover body part, the main body part is connected to the partition plate and encloses the high-pressure cavity with the partition plate, the cover body part is connected to the partition plate or the main body part, and the cover body part encloses the balance cavity with the partition plate; the first connecting pipe and the second connecting pipe are arranged through and connected to the cover body part, and one of the first connecting pipe and the second connecting pipe communicates with the high-pressure cavity, and the other one communicates with the valve core.

[0010] In one of the embodiments, the cover body part is connected to the partition plate, and the valve body further comprises a ring-shaped part, the ring-shaped part is sleeved on the outer periphery of the partition plate and the cover body part and clamps the partition plate and the cover body part.

[0011] In one of the embodiments, the ring-shaped part is attached to and connected to the end face of one end of the main body part along the axis of the ring-shaped part.

[0012] In one of the embodiments, the partition plate, the main body part, the cover body part and the ring-shaped part are welded and fixed.

[0013] In one of the embodiments, the first channel is arranged as a through hole, one end of the valve core protrudes to form a rotating column, the rotating column is arranged through the through hole and rotationally connected with the through hole.

[0014] In one of the embodiments, the reversing valve further comprises a first bearing, the inner ring of the first bearing is fixed to the outer periphery of the rotating column, and the outer ring of the first bearing is fixed to the side wall of the through hole.

[0015] In one of the embodiments, the first bearing protrudes from one end of the through hole close to the balance cavity, and the reversing valve further comprises a mounting seat, the mounting seat is arranged in the balance cavity and connected with the partition plate; the mounting seat is provided with a mounting groove and a balance channel, the part of the first bearing protruding from the through hole is arranged in the mounting groove, and the balance channel communicates the mounting groove and the balance cavity.

[0016] In one of the embodiments, the outer wall of the first connecting pipe is formed with a first step, the outer wall of the second connecting pipe is formed with a second step, and the two sides of the end of the mounting seat away from the partition plate are respectively abutted to the first step and the second step.

[0017] In one of the embodiments, the reversing valve further comprises a second bearing, the second bearing is arranged at one end of the valve core away from the partition plate, the inner ring of the second bearing is connected with the outer side wall of the valve core, and the outer ring of the second bearing is connected with the inner wall of the valve body.

[0018] The application further provides an air conditioning system comprising the reversing valve according to any one of the above embodiments.

[0019] Compared with the related art, the reversing valve and the air conditioning system provided by the application, the partition plate plays the role of the valve cover in the traditional structure, and the partition plate divides the internal cavity of the valve body into a high-pressure cavity and a balance cavity. Since the high-pressure cavity and the balance cavity are in communication with each other, the pressure balance on both sides of the partition plate can be achieved, and the deformation of the partition plate caused by the pressure on one side of the partition plate is avoided. This makes the partition plate and the valve core maintain continuous abutment during the rotation of the valve core to switch the flow path, thereby effectively preventing the mutual mixing of the medium in the valve core and the medium in the valve body at the abutment position of the valve core and the partition plate, i.e., avoiding internal leakage, and greatly improving the sealing performance of the reversing valve. At the same time, since the partition plate will not be deformed under pressure, the thickness of the partition plate can be designed to be smaller, thereby reducing the overall weight of the reversing valve and reducing the cost.

[0020] The details of one or more embodiments of the application are presented in the following drawings and description. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0022] FIG. 1 is a structural schematic diagram of a reversing valve according to an embodiment of the application.

[0023] FIG. 2 is an exploded view of the reversing valve according to an embodiment of the application.

[0024] FIG. 3 is an exploded view of part of the structure of the reversing valve according to an embodiment of the application.

[0025] FIG. 4 is a sectional view at A-A in FIG. 1.

[0026] FIG. 5 is a sectional view at B-B in FIG. 1.

[0027] FIG. 6 is a sectional view of the reversing valve according to an embodiment of the application.

[0028] FIG. 7 is a schematic diagram of an air conditioning system according to an embodiment of the application.

[0029] The meanings of the symbols in the figure are as follows: 100, a reversing valve; 10, a valve body; 101, a high-pressure cavity; 102, a balance cavity; 103, a first valve port; 104, a second valve port; 105, a second channel; 11, a main body part; 12, a cover body part; 13, an annular part; 20, a valve core; 201, a low-pressure cavity; 21, a rotating column; 22, a sealing member; 30, a partition plate; 301, a first channel; 40, a first connecting pipe; 41, a first step; 50, a second connecting pipe; 51, a second step; 60, a first bearing; 70, a mounting seat; 701, a mounting groove; 702, a balance channel; 80, a second bearing; 200, an air conditioning system. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0032] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the application's specification have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. The terminology used in the application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" and "one or more of the listed items" in the application's specification are intended to encompass the items individually or in any combination of one or more of the items.

[0035] The reversing valve is an important component in the air conditioning system, which includes a valve body, a valve cover and a valve core. The valve cover is connected to one end of the valve body, and the valve core is arranged in the valve body and connected to the valve body at one end and abuts against the valve cover at the other end. The valve core can rotate relative to the valve body to connect different flow ports on the valve cover, so as to switch the flow direction of the refrigerant and realize the conversion of the refrigeration and heating modes.

[0036] However, since the valve body flows high-pressure medium and the valve core flows low-pressure medium, the high-pressure medium will exert a large force on the valve cover during the operation of the reversing valve, so that the valve cover will be deformed under stress. Therefore, when the valve core rotates on the valve cover to switch the flow ports, a gap will be generated between the valve core and the surface of the valve cover, resulting in internal leakage of the medium between the valve core channel and the valve body cavity, and reducing the use performance of the reversing valve.

[0037] Please refer to FIG. 1-6, in order to solve the problem that the existing reversing valve is prone to poor cooperation between the valve cover and the valve core under the action of high-pressure medium, the application provides a reversing valve 100, which includes a valve body 10, a valve core 20, a partition plate 30, a first connecting pipe 40 and a second connecting pipe 50. The partition plate 30 is arranged in the valve body 10 and divides the internal space of the valve body 10 into a high-pressure cavity 101 and a balance cavity 102, and the high-pressure cavity 101 and the balance cavity 102 are in communication with each other. The first connecting pipe 40 and the second connecting pipe 50 are arranged at one end of the valve body 10 close to the balance cavity 102, and both the first connecting pipe 40 and the second connecting pipe 50 pass through the valve body 10 and are connected to the valve body 10 and the partition plate 30. The valve core 20 is arranged in the high-pressure cavity 101, and one end of the valve core 20 is rotationally connected to the valve body 10, and the other end abuts against the partition plate 30 and selectively communicates with the first connecting pipe 40 or the second connecting pipe 50.

[0038] It can be understood that the partition plate 30 of the present application plays the role of the valve cover in the traditional structure, and at the same time, the partition plate 30 divides the internal cavity of the valve body 10 into the high-pressure cavity 101 and the balance cavity 102. Since the high-pressure cavity 101 and the balance cavity 102 are in communication with each other, the pressure balance on both sides of the partition plate 30 can be achieved, and the deformation of the partition plate 30 caused by the pressure on one side can be avoided. This makes the partition plate 30 keep continuous abutment with the valve core 20 during the rotation of the valve core 20 to realize the switching of the flow path, thereby effectively preventing the mutual mixing of the media in the valve core 20 and the media in the valve body 10 at the abutment position of the valve core 20 and the partition plate 30, i.e. avoiding internal leakage, and greatly improving the sealing performance of the reversing valve 100. At the same time, since the partition plate 30 will not be deformed under pressure, the thickness of the partition plate 30 can be designed to be smaller, thereby reducing the overall weight of the reversing valve 100 and reducing the cost.

[0039] Further, the valve core 20 is provided with a sealing element 22 at the abutment position with the partition plate 30, and the sealing element 22 can be one or more to further improve the sealing performance between the valve core 20 and the partition plate 30 and prevent internal leakage.

[0040] Specifically, the valve core 20 is internally structured with a low-pressure cavity 201, the valve body 10 is provided with a first valve port 103 and a second valve port 104, and one end of the valve core 20 is connected to the valve body 10 at the first valve port 103, so that the first valve port 103 is in communication with the low-pressure cavity 201. The second valve port 104 is arranged on the peripheral side of the valve body 10, and the second valve port 104 is in communication with the high-pressure cavity 101. Here, the second valve port 104 is the inlet of the high-pressure cavity 101, which is in communication with the outlet of the compressor, and the first valve port 103 is the outlet of the low-pressure cavity 201, which is in communication with the inlet of the compressor. Further, the first connecting pipe 40 is used to connect the first heat exchanger, and the second connecting pipe 50 is used to connect the second heat exchanger.

[0041] The present application specifically takes the first heat exchanger as the indoor heat exchanger and the second heat exchanger as the outdoor heat exchanger as an example. When the air conditioning system is in a refrigeration state, the high-pressure medium flowing out of the outlet of the compressor enters the high-pressure cavity 101 from the second valve port 104 of the reversing valve 100. At this time, the valve core 20 connects the first valve port 103 and the first connecting pipe 40, so that the high-pressure medium in the high-pressure cavity 101 flows out of the second connecting pipe 50 and sequentially flows into the inlet of the compressor through the second heat exchanger, the first heat exchanger, the first connecting pipe 40, the low-pressure cavity 201 and the first valve port 103, thereby realizing a primary refrigeration cycle.

[0042] When the air conditioning system is in the heating state, the high-pressure medium flowing out of the compressor outlet enters the high-pressure cavity 101 from the second valve port 104 of the reversing valve 100, at this time, the valve core 20 communicates the first valve port 103 and the second connecting pipe 50, so that the high-pressure medium in the high-pressure cavity 101 flows out from the first connecting pipe 40, and sequentially flows into the inlet of the compressor through the first heat exchanger, the second heat exchanger, the second connecting pipe 50, the low-pressure cavity 201 and the first valve port 103, so as to realize the first heating cycle.

[0043] In order to realize the pressure balance of the high-pressure cavity 101 and the balance cavity 102, the application can open a channel on the partition plate 30 and / or the valve body 10 to realize the communication of the high-pressure cavity 101 and the balance cavity 102.

[0044] For example, a first channel 301 is opened on the partition plate 30 to communicate the high-pressure cavity 101 and the balance cavity 102 through the first channel 301. Alternatively, a second channel 105 is opened on the valve body 10 to communicate the high-pressure cavity 101 and the balance cavity 102 through the second channel 105. Alternatively, the first channel 301 is opened on the partition plate 30, and the second channel 105 is opened on the valve body 10, and the high-pressure cavity 101 and the balance cavity 102 are communicated through the first channel 301 and the second channel 105.

[0045] In an embodiment, as shown in FIGS. 2, 4 and 5, the valve body 10 includes a main body part 11 and a cover body part 12, the main body part 11 is connected to the partition plate 30 and surrounds the high-pressure cavity 101 with the partition plate 30, and the cover body part 12 is connected to one end of the partition plate 30 away from the main body part 11 and surrounds the balance cavity 102 with the partition plate 30. Among them, the first connecting pipe 40 and the second connecting pipe 50 are connected to the cover body part 12, and one of the first connecting pipe 40 and the second connecting pipe 50 communicates with the high-pressure cavity 101, and the other communicates with the valve core 20.

[0046] In this way, the installation of the partition plate 30 is facilitated by the split structure, and the installation difficulty of the partition plate 30 can be reduced.

[0047] It should be noted that the first connecting pipe 40 and the second connecting pipe 50 can form a relatively sealed balance cavity 102 structure after being connected to the cover body part 12 and the partition plate 30, so that the balance cavity 102 can only communicate with the high-pressure cavity 101 through the first channel 301 and / or the second channel 105.

[0048] In another embodiment, the cover body part 12 can also be connected to the main body part 11. The application is specifically described in the scheme that the cover body part 12 is connected to the partition plate 30.

[0049] In an embodiment, as shown in FIG. 3, FIG. 4 and FIG. 5, the valve body 10 further comprises a ring-shaped portion 13, which is sleeved on the outer periphery of the partition plate 30 and the cover body portion 12 and clamps the partition plate 30 and the cover body portion 12. In this way, the connection strength between the partition plate 30 and the cover body portion 12 can be effectively improved.

[0050] Further, in an embodiment, the ring-shaped portion 13 is attached to and connected with the main body portion 11 at the end face of one end along the axis of the ring-shaped portion 13. That is, the ring-shaped portion 13 is connected with the partition plate 30, the cover body portion 12 and the main body portion 11 at the same time, further improving the connection strength between the partition plate 30, the cover body portion 12 and the main body portion 11.

[0051] In an embodiment, the partition plate 30, the main body portion 11, the cover body portion 12 and the ring-shaped portion 13 are welded and fixed. In this way, the connection between the parts of the reversing valve 100 is relatively simple, which can effectively improve the connection efficiency and ensure the sealing performance.

[0052] Specifically, the partition plate 30, the main body portion 11, the cover body portion 12 and the ring-shaped portion 13 are fixed by furnace welding. Of course, the fixation can also be achieved by laser welding and other processes, which can be reasonably set according to actual needs.

[0053] In an embodiment, as shown in FIG. 4 and FIG. 5, the first channel 301 is provided as a through hole, and one end of the valve core 20 protrudes to form a rotating column 21, which is sleeved in the through hole and rotationally connected with the through hole. The axis of the rotating column 21 is the rotation axis of the valve core 20, thereby facilitating the rotation of the valve core 20 around the axis.

[0054] The rotating column 21 can be welded on the valve core 20 or provided as an integrated type with the valve core 20.

[0055] In order to reduce the friction between the rotating column 21 and the inner wall of the through hole, in an embodiment, as shown in FIG. 4 and FIG. 5, the reversing valve 100 further comprises a first bearing 60, the inner ring of which is fixed to the outer periphery of the rotating column 21, and the outer ring of which is fixed to the side wall of the through hole. In this way, the rotating column 21 and the through hole are facilitated to rotate together, and the first bearing 60 can also ensure that the axis of the rotating column 21 does not deviate during rotation, thereby improving the reliability of the cooperation between the valve core 20 and the partition plate 30.

[0056] It should be noted that the outer ring and the inner ring of the first bearing 60 usually have a gap therebetween, through which the high-pressure medium can flow between the high-pressure cavity 101 and the balance cavity 102.

[0057] Further, in an embodiment, the first bearing 60 protrudes from the through hole towards one end of the balance cavity 102. The reversing valve 100 further comprises a mounting seat 70 arranged in the balance cavity 102 and connected with the partition plate 30. The mounting seat 70 is provided with a mounting groove 701, and the part of the first bearing 60 protruding from the through hole is arranged in the mounting groove 701.

[0058] In this way, the reliability of the cooperation between the first bearing 60 and the through hole can be improved, and the first bearing 60 can be prevented from being separated from the through hole under the action of the force such as the pressure of the fluid medium. In addition, the mounting seat 70 is further provided with a balance channel 702, which is in communication with the mounting groove 701 and the balance cavity 102, so as to realize the smooth flow of the high-pressure medium.

[0059] In an embodiment, as shown in FIGS. 3 and 4, the outer wall of the first connecting pipe 40 is formed with a first step 41, the outer wall of the second connecting pipe 50 is formed with a second step 51, and the two sides of the end of the mounting seat 70 away from the partition plate 30 abut against the first step 41 and the second step 51, respectively. That is, the first connecting pipe 40 and the second connecting pipe 50 are both provided with a step structure to avoid the mounting seat 70, so that the arrangement of the components is more compact, and the space utilization can be improved. At the same time, the first step 41 and the second step 51 can also provide a stop for the mounting seat 70, so that the connection of the mounting seat 70 is more firm.

[0060] In an embodiment, as shown in FIGS. 4 and 5, the reversing valve 100 further comprises a second bearing 80 arranged at one end of the valve core 20 away from the partition plate 30, and the inner ring of the second bearing 80 is connected with the outer side wall of the valve core 20, and the outer ring of the second bearing 80 is connected with the inner wall of the valve body 10. In this way, the frictional resistance during the rotation of the valve core 20 is further reduced.

[0061] As shown in FIG. 7, the application further provides an air conditioning system 200, which comprises a compressor, a first heat exchanger, a second heat exchanger, and the reversing valve 100 of any one of the above embodiments.

[0062] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0063] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. A reversing valve characterized by comprising: The valve body, the valve core, the partition plate, the first connecting pipe and the second connecting pipe, the partition plate is arranged in the valve body and separates the internal space of the valve body to form a high-pressure cavity and a balance cavity, the high-pressure cavity and the balance cavity are communicated with each other; The valve core is arranged in the high-pressure cavity, one end of the valve core is rotationally connected with the valve body, the other end of the valve core is movably abutted with the partition plate and selectively communicates the first connecting pipe or the second connecting pipe.

2. The reversing valve of claim 1, wherein, The first channel is formed in the partition plate, and the first channel respectively communicates the high-pressure cavity and the balance cavity.

3. The diverter valve of claim 1, wherein, The second channel is formed in the valve body, and the second channel respectively communicates the high-pressure cavity and the balance cavity.

4. The diverter valve of claim 1, wherein, The valve body comprises a main body part and a cover body part, the main body part is connected with the partition plate and surrounds the high-pressure cavity with the partition plate, the cover body part is connected with the partition plate or the main body part, and the cover body part surrounds the balance cavity with the partition plate; The first connecting pipe and the second connecting pipe are arranged in and connected with the cover body part, and one of the first connecting pipe and the second connecting pipe communicates the high-pressure cavity, and the other one communicates the valve core.

5. The reversing valve of claim 4, wherein, The cover body part is connected with the partition plate, the valve body further comprises an annular part, the annular part is sleeved on the outer periphery of the partition plate and the cover body part and clamps the partition plate and the cover body part.

6. The reversing valve of claim 5, wherein, The end face of one end of the annular part along the axis of the annular part is attached to and connected with the main body part.

7. The reversing valve of claim 6, wherein, The partition plate, the main body part, the cover body part and the annular part are welded and fixed.

8. The diverter valve of claim 2, wherein, The first channel is provided as a through hole, one end of the valve core protrudes to form a rotating column, the rotating column is arranged in the through hole and rotationally connected with the through hole.

9. The diverter valve of claim 8, wherein, The reversing valve further comprises a first bearing, the inner ring of the first bearing is fixed to the outer periphery of the rotating column, and the outer ring of the first bearing is fixed to the side wall of the through hole.

10. The reversing valve of claim 9, wherein, The first bearing protrudes from one end of the through hole close to the balance cavity, and the reversing valve further comprises a mounting seat, the mounting seat is arranged in the balance cavity and connected with the partition plate; The mounting seat is provided with a mounting groove and a balance channel, the part of the first bearing protruding from the through hole is arranged in the mounting groove, and the balance channel communicates the mounting groove and the balance cavity.

11. The reversing valve of claim 10, wherein, The outer wall of the first connecting pipe is formed with a first step, the outer wall of the second connecting pipe is formed with a second step, and the two sides of one end of the mounting seat away from the partition plate are respectively abutted with the first step and the second step.

12. The diverter valve of claim 10, wherein, The reversing valve further comprises a second bearing, the second bearing is arranged at one end of the valve core away from the partition plate, the inner ring of the second bearing is connected with the outer side wall of the valve core, and the outer ring of the second bearing is connected with the inner wall of the valve body.

13. An air conditioning system, characterized by, The reversing valve comprises any one of claims 1-12. The reversing valve comprises any one of claims 1-12.

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