Multi-way valve

Abstract

The utility model provides a multi-way valve. The multi-way valve comprises a driving assembly and a valve body, the valve body is provided with a communicating cavity, an inlet-outlet and a communicating port; the valve element is rotatably arranged in the communicating cavity, the communicating openings are annularly formed around the rotating axis of the valve element, the valve element is provided with a circulating channel, the first end of the circulating channel is located on the rotating axis of the valve element and communicates with the inlet and outlet, and the second end of the circulating channel selectively communicates with the communicating openings; a sealing structure is arranged between the second end of the circulation channel and the communication port; the valve body is provided with a mounting hole, one end of the mounting hole is communicated with the communicating cavity, the other end of the mounting hole is provided with a driving cavity, the valve element is provided with a driving shaft, a bearing is arranged between the driving shaft and the inner wall of the mounting hole and located at the end, close to the driving cavity, of the mounting hole, and the end, close to the communicating cavity, of the mounting hole is matched with the driving shaft in size. By means of the technical scheme, the problem that in the prior art, the matching space of a valve seat and a sealing structure is insufficient can be solved.

Description

Technical Field

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

[0002] At present, a multi-way valve is usually used to switch the cooling and heating modes of an air conditioner. The multi-way valve usually includes a driving device, a valve body and a valve core. The valve body is provided with a plurality of connecting ports connected to the refrigerant pipeline. The valve core is arranged in the valve body. The valve core has a circulation channel. The circulation channel is driven by the driving device to rotate and switch between the plurality of connecting ports to realize the switching of the cooling and heating modes. A sealing structure is provided on the valve core to seal the gap between the circulation channel and the connecting port to reduce the internal leakage of the multi-way valve.

[0003] In the prior art, a bearing is usually mounted on the connecting shaft between the valve core and the driving device to improve the stability of the valve core rotation. For ease of installation, the bearing is usually mounted on the connecting shaft first, and the valve core is installed from the end of the valve body away from the driving device. This will cause interference between the bearing and the sealing structure, affecting the normal use of the sealing structure. In some existing installation schemes, a groove is cut on the valve body and the bearing is assembled in the groove to avoid the sealing structure. However, this will reduce the fitting area between the sealing structure and the valve body, thereby reducing the sealing effect of the sealing structure. Utility Model Content

[0004] The utility model provides a multi-way valve to solve the problem of insufficient matching space between a valve seat and a sealing structure in the prior art.

[0005] The utility model provides a multi-way valve, which comprises: a driving component; a valve body, which has a connecting cavity, an inlet and an outlet, and a connecting port, wherein the connecting port has a plurality of connecting ports, the plurality of connecting ports are arranged on the valve body at annular intervals, and the plurality of connecting ports are all connected to the connecting cavity, and the inlet and the outlet are connected to the connecting cavity; a valve core is rotatably arranged in the connecting cavity, the plurality of connecting ports are arranged in annularly around the rotation axis of the valve core, the valve core has a circulation channel, the first end of the circulation channel is located on the rotation axis of the valve core and is connected to the inlet and the outlet, the second end of the circulation channel can be selectively connected to the connecting port, and a sealing structure is arranged between the second end of the circulation channel and the connecting port; wherein the valve body has a mounting hole arranged through, one end of the mounting hole is connected to the connecting cavity, the other end of the mounting hole is provided with a driving cavity, at least part of the driving component is arranged in the driving cavity, the valve core has a driving shaft, the driving shaft is penetrated in the mounting hole and connected to the driving component, a bearing is arranged between the driving shaft and the inner wall of the mounting hole, the bearing is located at one end of the mounting hole close to the driving cavity, and the end of the mounting hole close to the connecting cavity is adapted to the size of the driving shaft.

[0006] By applying the technical solution of the utility model, the multi-way valve includes a driving assembly, a valve body and a valve core. The valve core can rotate in the connecting cavity so that the second end of the circulation channel can be selectively connected to the connecting port, thereby realizing the switching of the cooling and heating modes. By setting a sealing structure, the sealing structure can be used to seal the gap between the second end of the circulation channel and the plane where the connecting port is located, thereby reducing the internal leakage of the multi-way valve and ensuring the use effect of the multi-way valve. In addition, by setting a bearing at one end of the mounting hole close to the driving cavity, the end of the mounting hole close to the connecting cavity is adapted to the size of the driving shaft, so that the bearing and the sealing structure are respectively at both ends of the mounting hole, and the two will not affect each other. The matching area between the sealing structure and the side wall of the connecting cavity with the connecting port can be improved, thereby ensuring that there is sufficient matching space between the sealing structure and the valve body, ensuring the sealing effect of the sealing structure, further improving the sealing performance of the multi-way valve, and reducing the risk of internal leakage of the multi-way valve.

[0007] Furthermore, the multi-way valve further comprises a sealing ring, which is sleeved on the driving shaft and located on the side of the bearing close to the connecting cavity, a sealing groove is provided in the mounting hole, the sealing ring is located in the sealing groove, and there is a gap between the sealing groove and the side wall of the connecting cavity having the connecting port. Through the above arrangement, the sealing ring can be used to seal the gap between the driving shaft and the mounting hole to prevent refrigerant leakage.

[0008] Furthermore, a lubricating layer is provided on the outer surface of the drive shaft to reduce the friction coefficient between the drive shaft and the sealing ring. Through the above arrangement, the load torque from the sealing ring received by the drive shaft during rotation can be reduced, and the smoothness of the rotation of the drive shaft can be improved.

[0009] Furthermore, a mounting groove is provided in the mounting hole, and the mounting groove is provided at one end of the mounting hole close to the driving cavity, and the bearing is located in the mounting groove. Through the above arrangement, the coaxiality between the valve core and the mounting hole can be ensured, the stability of the valve core rotation can be ensured, and the action torque when the multi-way valve switches between cooling and heating modes can be reduced.

[0010] Furthermore, the drive shaft has a body section and a mounting section connected to each other, the bearing sleeve is arranged on the mounting section, the diameter of the body section is larger than the diameter of the mounting section, a stepped surface is formed between the body section and the mounting section, and the stepped surface is used to abut against the inner ring of the bearing on the side away from the drive assembly. Through the above arrangement, the displacement of the bearing toward the connecting cavity can be limited, which plays a role in limiting the bearing and ensuring the stability of the bearing during operation.

[0011] Furthermore, the drive assembly includes a drive mechanism and a reduction mechanism, the drive mechanism is connected to the reduction mechanism by driving, the reduction mechanism is arranged in the drive cavity, the reduction mechanism has a housing and an output shaft, and the drive shaft is connected to the output shaft by driving. Through the above arrangement, the reduction mechanism can increase the torque of the drive mechanism and ensure the switching effect of the valve core.

[0012] Furthermore, the end surface of the housing facing the mounting hole abuts against the outer ring of the bearing away from the connecting cavity. Through the above arrangement, the housing can limit the displacement of the bearing away from the connecting cavity, further improving the stability of the bearing installed on the drive shaft.

[0013] Furthermore, a guide channel is provided on the drive shaft, one end of which is connected to the circulation channel, and the other end of which is connected to the drive cavity. Through the above arrangement, low-temperature and low-pressure refrigerant fluid will flow to the drive cavity through the guide channel to cool the drive component, reduce the magnetic loss of the drive component, and extend the service life of the drive component.

[0014] Furthermore, the multi-way valve further comprises a slider, which is movably arranged on the valve core, the slider is located at the second end of the circulation channel, the slider has a circulation hole, one end of the circulation hole is connected to the second end of the circulation channel, the other end of the circulation hole is arranged corresponding to the communication port, and the communication port is connected to the circulation channel through the circulation hole. Through the above arrangement, the slider can be closely attached to the surface where the communication port is located under the drive of the high-pressure refrigerant, thereby reducing the leakage of the internal fluid of the multi-way valve and ensuring the sealing performance of the slider and the surface where the communication port is located.

[0015] Furthermore, an annular boss is arranged on the end surface of the slider near the connecting port, the annular boss is arranged around the outer circumference of the flow hole, and the annular boss is used to abut against the surface where the connecting port is located. Through the above arrangement, the wear of the slider can be reduced and the service life of the slider can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A cross-sectional view of a multi-way valve provided by the utility model is shown;

[0018] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 A cross-sectional view of the valve seat provided by the utility model is shown;

[0020] Figure 4 The structure diagram of the valve seat provided by the utility model is shown;

[0021] Figure 5 The schematic diagram of the structure of the sliding block provided by the utility model is shown.

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

[0023] 10. driving assembly; 11. driving mechanism; 12. speed reduction mechanism; 121. housing; 122. output shaft;

[0024] 20, valve body; 201, valve seat; 202, valve cover;

[0025] 21. Communication cavity; 22. Entrance and exit; 23. Communication port; 231. First communication port; 232. Second communication port; 233. Third communication port; 24. Mounting hole; 241. Sealing groove; 242. Mounting groove; 25. Bearing; 26. Sealing ring; 27. Driving cavity;

[0026] 30. Valve core; 31. Circulation channel; 32. Drive shaft; 321. Body section; 322. Mounting section; 33. Guide channel; 34. Slider; 341. Circulation hole; 342. Annular boss. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] like Figures 1 to 3As shown, the embodiment of the utility model provides a multi-way valve, which includes a driving assembly 10, a valve body 20 and a valve core 30. The valve body 20 has a communication cavity 21, an inlet and outlet 22 and a communication port 23. There are multiple communication ports 23, which are arranged on the valve body 20 in annular intervals, and the multiple communication ports 23 are all connected to the communication cavity 21, and the inlet and outlet 22 are connected to the communication cavity 21. The valve core 30 is rotatably arranged in the communication cavity 21, and the multiple communication ports 23 are arranged in annularly around the rotation axis of the valve core 30. The valve core 30 has a circulation channel 31, the first end of the circulation channel 31 is located on the rotation axis of the valve core 30 and is connected to the inlet and outlet 22, the second end of the circulation channel 31 can be selectively connected to the communication port 23, and a sealing structure is arranged between the second end of the circulation channel 31 and the communication port 23. Among them, the valve body 20 has a mounting hole 24 that is set through, one end of the mounting hole 24 is connected to the connecting cavity 21, and the other end of the mounting hole 24 is provided with a driving cavity 27, at least part of the driving component 10 is arranged in the driving cavity 27, the valve core 30 has a driving shaft 32, the driving shaft 32 is passed through the mounting hole 24 and is connected to the driving component 10, a bearing 25 is arranged between the driving shaft 32 and the inner wall of the mounting hole 24, the bearing 25 is located at one end of the mounting hole 24 close to the driving cavity 27, and the end of the mounting hole 24 close to the connecting cavity 21 is adapted to the size of the driving shaft 32.

[0029] By applying the technical solution of the utility model, the multi-way valve includes a drive assembly 10, a valve body 20 and a valve core 30. The valve core 30 can rotate in the connecting chamber 21 so that the second end of the circulation channel 31 can be selectively connected to the connecting port 23, thereby realizing the switching of the cooling and heating modes. By setting a sealing structure, the sealing structure can be used to block the gap between the second end of the circulation channel 31 and the plane where the connecting port 23 is located, thereby reducing the internal leakage of the multi-way valve and ensuring the use effect of the multi-way valve. In addition, by setting the bearing 25 at one end of the mounting hole 24 close to the driving chamber 27, the end of the mounting hole 24 close to the connecting chamber 21 is adapted to the size of the driving shaft 32, so that the bearing 25 and the sealing structure are respectively at the two ends of the mounting hole, and the two will not affect each other. The matching area between the sealing structure and the side wall of the connecting chamber 21 having the connecting port 23 can be improved, thereby ensuring that there is sufficient matching space between the sealing structure and the valve body 20, ensuring the sealing effect of the sealing structure, further improving the sealing performance of the multi-way valve, and reducing the risk of internal leakage of the multi-way valve.

[0030] Furthermore, through the technical solution provided in the present application, while ensuring that the sealing structure has sufficient contact area with the valve body 20, the connecting port 23 can be arranged closer to the rotation axis of the valve core 30, which helps to reduce the volume of the valve body and realize the miniaturization of the multi-way valve.

[0031] In the present application, the multi-way valve further comprises a sealing ring 26, which is sleeved on the drive shaft 32 and is located on the side of the bearing 25 close to the connecting cavity 21. A sealing groove 241 is provided in the mounting hole 24, and the sealing ring 26 is located in the sealing groove 241. There is a gap between the sealing groove 241 and the side wall of the connecting cavity 21 having the connecting port 23. Through the above arrangement, the sealing ring 26 can prevent the refrigerant in the connecting cavity 21 from leaking to the driving assembly 10 through the mounting hole 24, thereby ensuring the sealing performance of the multi-way valve and improving the use effect of the multi-way valve; and the sealing ring 26 is arranged in the sealing groove 241, which can avoid the opening of the receiving groove on the drive shaft 32, ensure the structural strength of the drive shaft 32, and reduce the risk of the drive shaft 32 breaking during the process of the drive assembly 10 driving the drive shaft 32 to rotate. The gap between the sealing groove 241 and the plane of the valve body 20 having the connecting port 23 enables the end of the mounting hole 24 close to the connecting cavity 21 to be compatible with the size of the drive shaft 32, ensuring that the sealing structure has sufficient sealing area.

[0032] In a specific embodiment of the present application, a lubricating layer is provided on the outer surface of the drive shaft 32 to reduce the friction coefficient between the drive shaft 32 and the sealing ring 26. Through the above arrangement, the load torque from the sealing ring 26 received by the drive shaft 32 during rotation can be reduced, and the driving load of the drive assembly 10 can be reduced, which is conducive to the rapid switching of the heating and cooling modes of the multi-way valve. Specifically, the material of the lubricating layer can be made of materials with good wear resistance and low friction coefficient, such as PTFE (polytetrafluoroethylene) or PFA (perfluoroalkyl compound).

[0033] Specifically, a mounting groove 242 is further provided in the mounting hole 24, and the mounting groove 242 is provided at one end of the mounting hole 24 close to the driving chamber 27, and the bearing 25 is located in the mounting groove 242. Through the above arrangement, the bearing 25 is arranged in the mounting groove 242, which can effectively reduce the friction load between the valve core 30 and the valve body 20, ensure the coaxiality of the valve core 30 and the mounting hole 24, ensure the stability of the rotation of the valve core 30, reduce the action torque when the multi-way valve switches between the cooling and heating modes, and realize the fast reversing function of the multi-way valve under high pressure difference.

[0034] In some feasible embodiments of the present application, since the valve core 30 is subjected to the force in the axial direction of the refrigerant fluid, the bearing 25 can select a thrust ball bearing or an angular contact bearing to make the valve core 30 more stable during rotation and avoid shaking of the valve core 30.

[0035] In the present application, there is a gap between the mounting groove 242 and the sealing groove 241, so that the bearing 25 and the sealing ring 26 can be stably installed without adopting the traditional technical solution of installing them through gaskets, thereby reducing the number of parts of the multi-way valve and facilitating the assembly of the multi-way valve.

[0036] Specifically, the drive shaft 32 has a body section 321 and a mounting section 322 connected to each other, the bearing 25 is sleeved on the mounting section 322, the diameter of the body section 321 is larger than the diameter of the mounting section 322, and a step surface is formed between the body section 321 and the mounting section 322, and the step surface is used to abut against the inner ring of the bearing 25 on the side away from the drive assembly 10. Through the above arrangement, the step surface and the mounting groove 242 can limit the displacement of the bearing 25 in the direction of the connecting cavity 21, play a role in limiting the bearing 25, and ensure the stability of the bearing 25 during operation.

[0037] Furthermore, the driving assembly 10 includes a driving mechanism 11 and a reduction mechanism 12, the driving mechanism 11 is drivingly connected to the reduction mechanism 12, the reduction mechanism 12 is arranged in the driving chamber 27, the reduction mechanism 12 has a housing 121 and an output shaft 122, and the driving shaft 32 is drivingly connected to the output shaft 122. Through the above arrangement, the reduction mechanism 12 can increase the torque of the driving mechanism 11, so that the valve core 30 can overcome the load torque and friction torque during the rotation process, ensure the switching effect of the valve core 30, and realize the rapid switching of the cooling and heating modes of the multi-way valve.

[0038] In a specific embodiment of the present application, the reduction mechanism 12 is a planetary gear reduction gear set.

[0039] Furthermore, the end surface of the housing 121 facing the mounting hole 24 abuts against the outer ring of the bearing 25 away from the connecting cavity 21. Through the above arrangement, the housing 121 can limit the displacement of the bearing 25 away from the connecting cavity 21, further improve the stability of the bearing 25 installed on the drive shaft 32, prevent the bearing 25 from moving and affecting the rotation effect of the valve core 30, and further improve the stability of the rotation of the valve core 30.

[0040] refer to Figure 4As shown, the multi-way valve is provided with three connecting ports 23 in this embodiment, specifically, the first connecting port 231, the second connecting port 232 and the third connecting port 233. The valve body 20 is provided with a first refrigerant channel, a second refrigerant channel and a third refrigerant channel, one end of the first refrigerant channel is located on the side wall of the valve body 20, the other end of the first refrigerant channel forms the first connecting port 231, one end of the second refrigerant channel and one end of the third refrigerant channel are both provided on the side wall of the valve body 20, the other end of the second refrigerant channel forms the second connecting port 232, and the other end of the third refrigerant channel forms the third connecting port 233. The multi-way valve can connect different pipelines, specifically, the low-temperature and low-pressure refrigerant can be introduced into the circulation channel 31 and the inlet and outlet 22, and the high-temperature and high-pressure refrigerant can be introduced into the communication cavity 21; the high-temperature and high-pressure refrigerant can also be introduced into the circulation channel 31 and the inlet and outlet 22, and the low-temperature and low-pressure refrigerant can be introduced into the communication cavity 21. When the multi-way valve switches between heating and cooling modes, the second end of the circulation channel 31 can rotate between the first connecting port 231 and the second connecting port 232 to connect the first refrigerant channel or the second refrigerant channel, thereby realizing the reversal of high-temperature and high-pressure refrigerant or low-temperature and low-pressure refrigerant to switch between heating and cooling modes.

[0041] In the application, the valve body 20 includes a valve seat 201 and a valve cover 202. The valve seat 201 has a communication port 23 and a mounting hole 24. The valve seat 201 and the valve cover 202 together form a communication cavity 21 to facilitate the processing and assembly of the multi-way valve.

[0042] In a specific embodiment of the present application, a guide channel 33 is provided on the drive shaft 32, one end of the guide channel 33 is connected to the circulation channel 31, and the other end of the guide channel 33 is connected to the drive chamber 27. According to the above design, when the low-temperature and low-pressure refrigerant fluid is selected to flow inside the circulation channel 31, and the high-temperature and high-pressure refrigerant fluid is circulated in the connecting chamber 21, the low-temperature and low-pressure refrigerant fluid will enter the guide channel 33 and flow to the drive chamber 27, so that the low-temperature and low-pressure refrigerant fluid inside the valve core 30 can flow into the magnetic rotor of the drive assembly 10, so as to cool the drive assembly 10, reduce the magnetic loss of the drive assembly 10, and extend the service life of the drive assembly 10.

[0043] In a specific embodiment of the present application, the multi-way valve further includes a slider 34, which is movably disposed on the valve core 30, and the slider 34 is located at the second end of the flow channel 31. Figure 5As shown, the slider 34 has a flow hole 341, one end of the flow hole 341 is connected to the second end of the flow channel 31, and the other end of the flow hole 341 is arranged corresponding to the communication port 23, and the communication port 23 is connected to the flow channel 31 through the flow hole 341. Through the above design, when the valve core 30 is rotating, the slider 34 can be driven by the high-pressure refrigerant to fit tightly with the surface where the communication port 23 is located, thereby reducing the leakage of the internal fluid of the multi-way valve and ensuring the sealing performance of the slider 34 and the surface where the communication port 23 is located.

[0044] Furthermore, an elastic member may be provided between the slider 34 and the valve core 30 to compensate the slider 34 and ensure the sealing performance between the slider 34 and the surface where the communication port 23 is located.

[0045] Specifically, an annular boss 342 is provided on the end surface of the slider 34 close to the communication port 23, and the annular boss 342 is arranged around the outer periphery of the flow hole 341, and the annular boss 342 is used to abut against the surface where the communication port 23 is located. Through the above arrangement, the annular boss 342 can reduce the contact area between the slider 34 and the surface where the communication port 23 is located, reduce the friction resistance when the valve core 30 is switched, reduce the wear of the slider 34, extend the service life of the slider 34, and thus ensure the sealing life of the sealing structure.

[0046] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. 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 the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0048] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model 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, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0050] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-way valve, characterized in that: The multi-way valve comprises: A drive assembly (10); A valve body (20) having a communication cavity (21), an inlet and outlet (22) and a communication port (23), wherein the communication port (23) is provided in plurality, the plurality of communication ports (23) are arranged in annular intervals on the valve body (20), and the plurality of communication ports (23) are all in communication with the communication cavity (21), and the inlet and outlet (22) is in communication with the communication cavity (21); A valve core (30) is rotatably arranged in the communication cavity (21); a plurality of communication ports (23) are arranged in a ring shape around the rotation axis of the valve core (30); the valve core (30) has a circulation channel (31); a first end of the circulation channel (31) is located on the rotation axis of the valve core (30) and is communicated with the inlet and outlet (22); a second end of the circulation channel (31) is selectively communicated with the communication port (23); and a sealing structure is arranged between the second end of the circulation channel (31) and the communication port (23); The valve body (20) has a mounting hole (24) extending therethrough, one end of the mounting hole (24) being in communication with the connecting cavity (21), the other end of the mounting hole (24) being provided with a driving cavity (27), at least a portion of the driving assembly (10) being arranged in the driving cavity (27), the valve core (30) having a driving shaft (32), the driving shaft (32) passing through the mounting hole (24) and being connected to the driving assembly (10), a bearing (25) being arranged between the driving shaft (32) and the inner wall of the mounting hole (24), the bearing (25) being located at one end of the mounting hole (24) close to the driving cavity (27), and the end of the mounting hole (24) close to the connecting cavity (21) being adapted to the size of the driving shaft (32).

2. The multi-way valve according to claim 1, characterized in that: The multi-way valve further comprises a sealing ring (26), the sealing ring (26) being sleeved on the driving shaft (32) and being located on a side of the bearing (25) close to the connecting cavity (21), a sealing groove (241) being provided in the mounting hole (24), the sealing ring (26) being located in the sealing groove (241), and a gap being provided between the sealing groove (241) and a side wall of the connecting cavity (21) having the connecting port (23).

3. The multi-way valve according to claim 2, characterized in that: The outer surface of the drive shaft (32) is provided with a lubricating layer to reduce the friction coefficient between the drive shaft (32) and the sealing ring (26).

4. The multi-way valve according to claim 1, characterized in that: A mounting groove (242) is also provided in the mounting hole (24), and the mounting groove (242) is provided at one end of the mounting hole (24) close to the driving cavity (27), and the bearing (25) is located in the mounting groove (242).

5. The multi-way valve according to claim 1, characterized in that: The drive shaft (32) comprises a main body section (321) and a mounting section (322) which are connected to each other. The bearing (25) is sleeved on the mounting section (322). The diameter of the main body section (321) is larger than the diameter of the mounting section (322). A stepped surface is formed between the main body section (321) and the mounting section (322). The stepped surface is used to abut against the inner ring of the bearing (25) on a side away from the drive assembly (10).

6. The multi-way valve according to claim 1, characterized in that: The drive assembly (10) comprises a drive mechanism (11) and a reduction mechanism (12); the drive mechanism (11) is drivingly connected to the reduction mechanism (12); the reduction mechanism (12) is arranged in the drive cavity (27); the reduction mechanism (12) has a housing (121) and an output shaft (122); the drive shaft (32) is drivingly connected to the output shaft (122).

7. The multi-way valve according to claim 6, characterized in that: The end surface of the housing (121) facing the mounting hole (24) abuts against the outer ring of the bearing (25) on the side away from the connecting cavity (21).

8. The multi-way valve according to claim 1, characterized in that: The driving shaft (32) is provided with a flow guiding channel (33), one end of the flow guiding channel (33) is in communication with the circulation channel (31), and the other end of the flow guiding channel (33) is in communication with the driving chamber (27).

9. The multi-way valve according to claim 1, characterized in that: The multi-way valve further comprises a slider (34), wherein the slider (34) is movably arranged on the valve core (30), the slider (34) is located at the second end of the circulation channel (31), the slider (34) has a circulation hole (341), one end of the circulation hole (341) is connected to the second end of the circulation channel (31), and the other end of the circulation hole (341) is arranged corresponding to the communication port (23), and the communication port (23) is connected to the circulation channel (31) through the circulation hole (341).

10. The multi-way valve according to claim 9, characterized in that: An annular boss (342) is provided on the end surface of the slider (34) close to the connecting port (23). The annular boss (342) is arranged around the outer periphery of the circulation hole (341). The annular boss (342) is used to abut against the surface where the connecting port (23) is located.

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