Multi-way valve

Abstract

The utility model provides a multi-way valve, which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve core is provided with a plurality of circulation ports; a communicating opening is formed in the end of the valve element, and the valve element is rotatably arranged in the valve cavity so that the communicating opening can selectively communicate with the circulating opening; the sealing assembly is arranged at the end, provided with the communicating opening, of the valve element in a sleeving mode and provided with a ring part and a supporting part, the end face, facing the side of the end cover, of the ring part and the end face, facing the end cover, of the supporting part are both in sealing fit with the end cover, the ring part is annular and used for sealing a gap between the communicating opening and the circulating opening, and the supporting part is arranged on the periphery of the ring part. A circulation structure is arranged on the side, facing the end cover, of the supporting part and communicates with the valve cavity. By means of the technical scheme, the problem that in the prior art, a valve element of a multi-way valve is subjected to large resistance in the rotating process can be solved.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and more specifically, to a multi-way valve. Background Technology

[0002] Currently, multi-way valves are commonly used in thermal management systems to switch between high-pressure and low-pressure fluid flow paths. A multi-way valve typically consists of a valve body and a valve core. The valve body has multiple flow ports on its side walls, while the valve core has a connecting port. The valve core is rotatably mounted within the valve body, allowing the connecting port to connect with different flow ports, thus enabling the multi-way valve to switch flow paths. To ensure that the interior of the valve body and the valve core do not communicate during operation, a sealing element is usually fitted onto the valve core to achieve internal sealing.

[0003] Because high-pressure fluid flows inside the valve body and low-pressure fluid flows inside the valve core, during the flow path switching when the valve core rotates, as the seal rotates and passes over the flow port, one side of the seal is exposed to the high-pressure area and the other side to the low-pressure area. At this time, the seal coinciding with the flow port will be subjected to the combined force of the high-pressure and low-pressure fluids, disrupting the force balance of the seal and causing it to deflect axially, leading to its deflection towards the flow port. Existing technology increases the sealing area of ​​the seal and expands its outer perimeter to provide support during rotation and prevent deflection. However, because the seal needs to maintain contact with the inner wall of the valve body, increasing the sealing area results in greater resistance during valve core rotation, affecting the switching speed of the multi-way valve. Utility Model Content

[0004] This invention provides a multi-way valve to solve the problem that the valve core of the existing multi-way valve will encounter large resistance during rotation.

[0005] This utility model provides a multi-way valve, which includes: a valve body, comprising a main body and an end cap, the main body and the end cap forming a valve cavity, the end cap having multiple flow ports; a valve core, the end of the valve core having a communication port, the valve core being rotatably disposed within the valve cavity so that the communication port can selectively communicate with the flow ports; and a sealing assembly, the sealing assembly being sleeved on the end of the valve core having the communication port, the sealing assembly having a ring portion and a support portion, the end faces of the ring portion and the support portion facing the end cap being sealed and fitted with the end cap, the ring portion being annular and used to seal the gap between the communication port and the flow port, the support portion being disposed on the outer periphery of the ring portion, the support portion having a flow structure on the side facing the end cap, the flow structure communicating with the valve cavity.

[0006] Furthermore, the sealing assembly has a support portion on the side facing the end cap, and the flow structure communicates with the support portion, so that the fluid in the valve chamber provides pressure to the support portion in a direction away from the end cap.

[0007] Furthermore, a flow groove is provided on the support part, the flow groove forms a flow structure, the opening of the flow groove faces the end cover, and the bottom of the flow groove forms a bearing part.

[0008] Furthermore, the support portion has a first sidewall and a second sidewall that are arranged opposite to each other along the rotation direction of the valve core, and the flow groove passes through the first sidewall and / or the second sidewall.

[0009] Furthermore, the support portion has a first sidewall and a second sidewall that are arranged opposite to each other along the rotation direction of the valve core. Both the first sidewall and the second sidewall are continuously arranged in the length direction and maintain a constant height.

[0010] Furthermore, the rotation trajectory of the valve core is arc-shaped or circular. Along the radial direction of the rotation trajectory, the sealing assembly has a first end and a second end that are arranged opposite to each other, and the flow groove passes through the sidewall of the first end and / or the sidewall of the second end.

[0011] Furthermore, the sealing assembly has a flow inlet hole arranged along the axial direction of the valve core, one end of which communicates with the flow groove, and the other end of which communicates with the valve cavity.

[0012] Furthermore, the sealing assembly includes a reinforcing member and a sealing member. Both the ring portion and the support portion are disposed on the sealing member. The reinforcing member and the sealing member are fixedly connected. The sealing member is located on the side of the reinforcing member closer to the end cap. The stiffness of the reinforcing member is greater than that of the sealing member.

[0013] Furthermore, the reinforcing member is provided with multiple first openings, and the sealing member is provided with multiple second openings. The multiple first openings and multiple second openings are provided in a one-to-one correspondence and are interconnected. The first openings and the second openings cooperate to form a flow structure. In the axial direction of the valve core, the projection of the first opening is located within the projection of the second opening, and the part of the reinforcing member located within the projection of the second opening forms a bearing part.

[0014] Furthermore, multiple flow channels are provided, and these multiple flow channels are interconnected.

[0015] Furthermore, during the rotation of the valve core and its passage through the flow port, the support has a suspended section and a sealing section arranged opposite to each other. The sealing section abuts against the end cover, and the suspended section coincides with the axial projection of the flow port. The side of the suspended section away from the central axis of the flow port abuts against the periphery of the flow port to form a fulcrum. Two adjacent fulcrums are connected to form a fulcrum axis, and the center of mass of the suspended section is located on the side of the fulcrum axis closer to the central axis of the flow port.

[0016] Furthermore, the multiple flow ports include a first flow port, a second flow port, a third flow port, and a fourth flow port. The valve core has a valve core cavity, one end of which is connected to the second flow port, and the other end of which is connected to either the third or fourth flow port. The valve core rotates around the central axis of the second flow port. When the valve core cavity is connected to the third flow port, the valve core cavity, the second flow port, and the third flow port form a first flow channel. The valve cavity, the first flow port, and the fourth flow port are connected and form a second flow channel spaced apart from the first flow channel. When the valve core cavity is connected to the fourth flow port, the valve core cavity, the second flow port, and the fourth flow port form a first flow channel. The valve cavity, the first flow port, and the third flow port are connected and form a second flow channel spaced apart from the first flow channel. The first flow channel is used for flowing low-pressure fluid, and the second flow channel is used for flowing high-pressure fluid.

[0017] By applying the technical solution of this application, the flow structure provided on the sealing assembly can communicate with the valve cavity. High-pressure fluid in the valve cavity can enter the side of the support facing the end cover through the flow structure. On one hand, after the high-pressure fluid enters the flow structure, it can exert a force on the sealing assembly away from the end cover on the side of the sealing assembly facing the end cover, reducing the pressure on the overall sealing assembly in the direction of the end cover, thereby reducing the resistance that the valve core needs to overcome when the sealing assembly rotates with the valve core. On the other hand, the flow structure can also reduce the area of ​​contact between the sealing assembly and the end cover, thus reducing the resistance that the valve core needs to overcome. By providing a flow structure on the sealing assembly, the switching resistance of the multi-way valve can be effectively reduced, ensuring the switching speed of the multi-way valve and improving the performance of the multi-way valve. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 An exploded view of the structure of the multi-way valve provided by this utility model is shown;

[0020] Figure 2 This invention provides a schematic diagram of the structure of a multi-way valve from one perspective.

[0021] Figure 3 This invention provides a schematic diagram of the structure of a multi-way valve from one perspective.

[0022] Figure 4 A cross-sectional view of the multi-way valve provided by this utility model is shown;

[0023] Figure 5 A schematic diagram of the sealing assembly provided by this utility model forming a fulcrum shaft is shown;

[0024] Figure 6 It shows Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 7 A schematic diagram of the sealing assembly according to the first embodiment of the present invention is shown;

[0026] Figure 8 A schematic diagram of the sealing assembly according to the second embodiment of the present invention is shown;

[0027] Figure 9 A schematic diagram of the sealing assembly according to the third embodiment of the present invention is shown;

[0028] Figure 10 A schematic diagram of the sealing assembly according to the fourth embodiment of the present invention is shown.

[0029] The above figures include the following reference numerals:

[0030] 01. Pivot axis;

[0031] 100. Valve body; 101. Valve cavity; 102. Flow port; 102D. First flow port; 102S. Second flow port; 102E. Third flow port; 102C. Fourth flow port;

[0032] 110. Body; 120. End cover;

[0033] 200. Valve core; 201. Connecting port;

[0034] 300. Sealing components;

[0035] 301. Ring portion; 302. Support portion; 303. Bearing portion; 304. Flow groove; 305. First sidewall; 306. Second sidewall; 307. First end; 308. Second end; 309. Flow inlet hole;

[0036] 310. Seal; 311. First opening;

[0037] 320. Reinforcing component; 321. Second opening;

[0038] 330. Sealing ring. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0040] like Figures 1 to 9 As shown, this utility model embodiment provides a multi-way valve, which includes a valve body 100, a valve core 200, and a sealing assembly 300. The valve body 100 includes a main body 110 and an end cap 120, which cooperate to form a valve cavity 101. The end cap 120 is provided with multiple flow ports 102. The valve core 200 has a connecting port 201 at its end, and the valve core 200 is rotatably disposed within the valve cavity 101 so that the connecting port 201 can selectively communicate with the flow ports 102. The sealing assembly 300 is sleeved on one end of the valve core 200 with the communication port 201. The sealing assembly 300 has a ring portion 301 and a support portion 302. The end faces of the ring portion 301 and the support portion 302 facing the end cover 120 are sealed and fitted with the end cover 120. The ring portion 301 is annular and is used to seal the gap between the communication port 201 and the flow port 102. The support portion 302 is disposed on the outer periphery of the ring portion 301. The support portion 302 has a flow structure on the side facing the end cover 120, and the flow structure is connected to the valve cavity 101.

[0041] Specifically, such as Figures 2 to 4As shown, the plurality of flow ports 102 include a first flow port 102D, a second flow port 102S, a third flow port 102E, and a fourth flow port 102C. The valve core 200 has a valve core cavity, one end of which is connected to the second flow port 102S, and the other end of which is connected to either the third flow port 102E or the fourth flow port 102C. When the valve core cavity is connected to the third flow port 102E, the valve core cavity, the second flow port 102S, and the third flow port 102E form a first flow channel. The valve cavity 101, the first flow port 102D, and the fourth flow port 102C are connected to form a second flow channel spaced apart from the first flow channel. When the valve core cavity is connected to the fourth flow port 102C, the valve core cavity, the second flow port 102S, and the fourth flow port 102C form the first flow channel. The valve cavity 101, the first flow port 102D, and the third flow port 102E are connected to form a second flow channel spaced apart from the first flow channel. The first flow channel is used for the flow of low-pressure fluid, and the second flow channel is used for the flow of high-pressure fluid. The valve core 200 rotates around the central axis of the second flow port 102S. During the rotation of the valve core 200, the fluid inside the valve core 200 is always low-pressure, and the fluid inside the valve cavity 101 is always high-pressure. The annular seal 310 is subjected to the pressure of the high-pressure fluid and will abut against the end cap 120 to achieve a seal and prevent internal leakage between the valve core 200 and the valve cavity 101.

[0042] Specific reference Figure 5 As shown, the ring portion 301 can seal the gap between the connecting port 201 and the flow port 102, preventing fluid from entering the valve core 200 through the valve cavity 101. During the rotation of the valve core 200 and its passage through the flow port 102, the support portion 302 has a suspended section and a sealing section arranged opposite to each other. The sealing section abuts against the end cover 120, and the suspended section coincides with the axial projection of the flow port 102. The side of the suspended section away from the central axis of the connecting port 201 abuts against the periphery of the flow port 102 to form a fulcrum. Two adjacent fulcrums are connected to form a fulcrum shaft 01. The center of mass of the suspended section is located on the side of the fulcrum shaft 01 close to the central axis of the connecting port 201. Thus, the theoretical resultant force point of the suspended section will be on the same side as the sealing section. After the sealing component 300 is subjected to force, the force on the side of the sealing component 300 near the center of the connecting port 201 on the fulcrum axis 01 will be much greater than the force on the side away from the center of the connecting port 201. That is, no torque will be generated to flip the sealing component 300 into the flow port 102, thus preventing the sealing component 300 from flipping.

[0043] By applying the technical solution of this application, the flow structure provided on the sealing assembly 300 can communicate with the valve chamber 101. The high-pressure fluid in the valve chamber 101 can enter the support part 302 on the side facing the end cover 120 through the flow structure. On the one hand, after the high-pressure fluid enters the flow structure, it can apply a force away from the end cover 120 to the sealing assembly 300 on the side facing the end cover 120, reducing the pressure of the entire sealing assembly 300 in the direction of the end cover 120, thereby reducing the resistance that the valve core 200 needs to overcome when the sealing assembly 300 rotates with the valve core 200. On the other hand, the flow structure can also reduce the sealing area between the sealing assembly 300 and the end cover 120, thereby reducing the resistance that the valve core 200 needs to overcome. By providing a flow structure on the sealing assembly 300, the switching resistance of the multi-way valve can be effectively reduced, the switching speed of the multi-way valve can be guaranteed, and the performance of the multi-way valve can be improved.

[0044] In this application, the sealing assembly 300 has a support portion 303 on the side facing the end cap 120, and the flow structure is connected to the support portion 303. The support portion 303 can withstand the pressure of the high-pressure fluid, so that the fluid in the valve chamber 101 can directly act on the support portion 303 to provide pressure to the support portion 303 in a direction away from the end cap 120.

[0045] Please refer to the details. Figures 7 to 9 As shown, in the first to third embodiments of this application, a flow groove 304 is provided on the support portion 302. The flow groove 304 forms a flow structure, and the high-pressure fluid in the valve cavity 101 can enter the sealing surface of the sealing assembly 300 and the end cover 120 through the flow groove 304. The opening of the flow groove 304 is set towards the end cover 120, and the bottom of the flow groove 304 forms a bearing portion 303. In this way, the high-pressure fluid can act on the bottom of the flow groove 304 to provide pressure to the sealing assembly 300 in the direction away from the end cover 120, thereby reducing the pressure of the sealing assembly 300 in the direction towards the end cover 120.

[0046] like Figure 7 As shown, in the first embodiment of this application, the support portion 302 has a first sidewall 305 and a second sidewall 306 disposed opposite to each other along the rotation direction of the valve core 200. The flow groove 304 penetrates the first sidewall 305 and / or the second sidewall 306. The flow groove 304 penetrating the first sidewall 305 and the second sidewall 306 can provide a flow path for the fluid to guide the high-pressure fluid in the valve cavity 101.

[0047] In other specific embodiments of this application, the first sidewall 305 and the second sidewall 306 are continuously arranged in the length direction and maintain a constant height. This arrangement ensures that there are no gaps on the first sidewall 305 and the second sidewall 306, thereby preventing the valve core 200 from getting stuck on the edge of the flow port 102 during the switching process.

[0048] Specifically, such as Figure 8 As shown, in the second embodiment of this application, the movement trajectory of the valve core 200 is arc-shaped or circular. Along the radial direction of the movement trajectory, the sealing assembly 300 has a first end 307 and a second end 308 disposed opposite to each other, and the flow groove 304 penetrates the sidewall of the first end 307 and / or the sidewall of the second end 308. In this embodiment, high-pressure fluid can enter the sealing surface of the sealing assembly 300 and the end cap 120 through the flow groove 304 penetrating the sidewall of the first end 307 and the sidewall of the second end 308. Compared with the first embodiment of this application, the straight edges of the first sidewall 305 and the second sidewall 306 can be kept continuous. During the reversal process, the straight edges scrape against the round edge of the flow port 102 on the end cap 120. Keeping the straight edges continuous reduces the risk of corner collisions and ensures that the sealing assembly 300 is not damaged. At the same time, it can also reduce the obstruction encountered by the sealing assembly 300 during rotation, thereby ensuring that the valve core 200 can be subjected to less resistance during rotation.

[0049] like Figure 9 As shown, in the third embodiment of this application, the sealing assembly 300 has a flow-inlet hole 309 arranged along the axial direction of the valve core 200. One end of the flow-inlet hole 309 communicates with the flow groove 304, and the other end of the flow-inlet hole 309 communicates with the valve cavity 101. The high-pressure fluid in the valve cavity 101 can enter the flow groove 304 through the flow-inlet hole 309. Compared with the technical solutions in the first and second embodiments of this application, the technical solution of this embodiment can ensure the continuity of the outer periphery of the sealing assembly 300 as much as possible, further reducing the risk of corner collision; and by providing the flow-inlet hole 309 arranged along the axial direction of the valve core 200, the total area of ​​the sealing assembly 300 subjected to the pressure of the high-pressure fluid in the valve cavity 101 can also be reduced, reducing the pressure exerted by the sealing assembly 300 on the end cap 120, and further reducing the resistance that the valve core 200 needs to overcome to rotate.

[0050] In the first to third embodiments of this application, multiple flow channels 304 can be provided, and the multiple flow channels 304 are interconnected. In this way, the pressure on the sealing component 300 can be averaged, preventing the sealing component 300 from deflecting due to different forces at different positions of the sealing component 300, and ensuring the stability of the sealing component 300 during the rotation of the valve core 200.

[0051] Specifically, the multiple flow channels 304 can be configured with different shapes according to the different shapes of the sealing assembly 300, so as to adapt to the requirements of various sealing assemblies 300.

[0052] Specifically, in this application, the sealing assembly 300 includes a reinforcing member 320 and a sealing member 310. Both the ring portion 301 and the support portion 302 are disposed on the sealing member 310. The reinforcing member 320 is fixedly connected to the sealing member 310, and the sealing member 310 is located on the side of the reinforcing member 320 near the end cap 120. The stiffness of the reinforcing member 320 is greater than that of the sealing member 310. This arrangement allows the reinforcing member 320 to strengthen the structural strength of the sealing member 310. By externally placing the reinforcing member 320 on the annular sealing member 310, the sealing member 310 is prevented from flipping into the flow port 102 and breaking when rotating with the valve core 200, thus ensuring the overall structural strength of the sealing assembly 300.

[0053] Furthermore, such as Figure 10 As shown, in the fourth embodiment of this application, the reinforcing member 320 is provided with a plurality of first openings 311, and the sealing member 310 is provided with a plurality of second openings 321. The plurality of first openings 311 and the plurality of second openings 321 are arranged in a one-to-one correspondence and are interconnected. The first openings 311 and the second openings 321 cooperate to form a flow structure. In the axial direction of the valve core 200, the projection of the first opening 311 is located within the projection of the second opening 321, and the portion of the reinforcing member 320 located within the projection of the second opening 321 forms a bearing portion 303. This arrangement can minimize the total area of ​​the sealing assembly 300 subjected to the pressure of the high-pressure fluid in the valve cavity 101, thereby reducing the pressure of the sealing assembly 300 on the end cap 120, and thus reducing the resistance from the sealing assembly 300 that needs to be overcome when the valve core 200 rotates. Furthermore, by achieving fluid flow through the structure of the first openings 311 and the second openings 321 cooperating, compared with the first to third embodiments of this application, the processing difficulty of the sealing member 310 can be reduced, and the manufacturing cost of the overall sealing assembly 300 can be reduced.

[0054] Specifically, the seal 310 can be made of PTFE material, which reduces the impact on the rotation of the valve core 200 while ensuring sealing performance.

[0055] Specifically, the reinforcing member 320 can be made of metal, such as steel or copper, to ensure that the reinforcing member 320 strengthens the structural strength of the sealing assembly 300.

[0056] Furthermore, such as Figure 6As shown, the sealing assembly 300 also includes a sealing ring 330, which is disposed between the valve core 200 and the sealing element 310 to achieve a seal between the valve core 200 and the annular sealing element 310. The inner ring of the sealing ring 330 fits against the outer wall of the valve core 200 to form a sealing point, and the outer ring of the sealing ring 330 fits against the inner wall of the annular sealing element 310 to form another sealing point. The two sealing points formed can seal the gap between the annular sealing element 310 and the valve core 200, preventing high-pressure gas from entering the valve cavity through the gap between the annular sealing element 310 and the valve core 200, thereby reducing the internal leakage of the multi-way valve.

[0057] Specifically, the sealing ring 330 can be made of soft rubber material, which can deform to a certain extent after assembly to provide a larger sealing area and ensure the sealing performance of the sealing ring 330.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0060] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0061] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0062] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-way valve, characterized in that, The multi-way valve includes: The valve body (100) includes a main body (110) and an end cap (120). The main body (110) and the end cap (120) cooperate to form a valve cavity (101). The end cap (120) is provided with a plurality of flow ports (102). A valve core (200) has a communication port (201) at its end. The valve core (200) is rotatably disposed in the valve cavity (101) so that the communication port (201) can be selectively connected to the flow port (102). A sealing assembly (300) is sleeved on one end of the valve core (200) having the communication port (201). The sealing assembly (300) has an annular portion (301) and a support portion (302). The end faces of the annular portion (301) and the support portion (302) facing the end cap (120) are sealed to the end cap (120). The annular portion (301) is annular and is used to seal the gap between the communication port (201) and the flow port (102). The support portion (302) is disposed on the outer periphery of the annular portion (301). The support portion (302) has a flow structure on the side facing the end cap (120), and the flow structure communicates with the valve cavity (101).

2. The multi-way valve according to claim 1, characterized in that, The sealing assembly (300) has a support portion (303) on the side facing the end cap (120), the flow structure communicates with the support portion (303), and the fluid in the valve chamber (101) provides pressure to the support portion (303) in a direction away from the end cap (120).

3. The multi-way valve according to claim 2, characterized in that, The support (302) is provided with a flow groove (304), which forms the flow structure. The opening of the flow groove (304) faces the end cap (120), and the bottom of the flow groove (304) forms the bearing part (303).

4. The multi-way valve according to claim 3, characterized in that, The support portion (302) has a first sidewall (305) and a second sidewall (306) disposed opposite to each other along the rotation direction of the valve core (200), and the flow groove (304) passes through the first sidewall (305) and / or the second sidewall (306).

5. The multi-way valve according to claim 3, characterized in that, The support (302) has a first sidewall (305) and a second sidewall (306) arranged opposite to each other along the rotation direction of the valve core (200). The first sidewall (305) and the second sidewall (306) are both continuously arranged in the length direction and maintain a constant height.

6. The multi-way valve according to claim 5, characterized in that, The rotation trajectory of the valve core (200) is arc-shaped or circular. Along the radial direction of the rotation trajectory, the sealing assembly (300) has a first end (307) and a second end (308) arranged opposite to each other. The flow groove (304) penetrates the side wall of the first end (307) and / or the side wall of the second end (308).

7. The multi-way valve according to claim 5, characterized in that, The sealing assembly (300) has a flow inlet (309) arranged along the axial direction of the valve core (200), one end of the flow inlet (309) is connected to the flow groove (304), and the other end of the flow inlet (309) is connected to the valve cavity (101).

8. The multi-way valve according to claim 2, characterized in that, The sealing assembly (300) includes a reinforcing member (320) and a sealing member (310). The ring portion (301) and the support portion (302) are both disposed on the sealing member (310). The reinforcing member (320) is fixedly connected to the sealing member (310). The sealing member (310) is located on the side of the reinforcing member (320) closer to the end cap (120). The stiffness of the reinforcing member (320) is greater than the stiffness of the sealing member (310).

9. The multi-way valve according to claim 8, characterized in that, The reinforcing member (320) is provided with a plurality of first openings (311), and the sealing member (310) is provided with a plurality of second openings (321). The plurality of first openings (311) and the plurality of second openings (321) are provided in a one-to-one correspondence and communicate with each other. The first openings (311) and the second openings (321) cooperate to form the flow structure. In the axial direction of the valve core (200), the projection of the first opening (311) is located within the projection of the second opening (321), and the portion of the reinforcing member (320) located within the projection of the second opening (321) forms the bearing portion (303).

10. The multi-way valve according to claim 3, characterized in that, Multiple flow channels (304) are provided, and the multiple flow channels (304) are interconnected.

11. The multi-way valve according to claim 1, characterized in that, During the rotation of the valve core (200) and its passage through the flow port (102), the support portion (302) has a suspended section and a sealing section arranged opposite to each other. The sealing section abuts against the end cap (120), and the suspended section coincides with the axial projection of the flow port (102). The side of the suspended section away from the central axis of the connecting port (201) abuts against the periphery of the flow port (102) to form a fulcrum. Two adjacent fulcrums are connected to form a fulcrum axis. The center of mass of the suspended section is located on the side of the fulcrum axis close to the central axis of the connecting port (201).

12. The multi-way valve according to claim 1, characterized in that, The plurality of flow ports (102) include a first flow port (102D), a second flow port (102S), a third flow port (102E), and a fourth flow port (102C). The valve core (200) has a valve core (200) cavity. One end of the valve core (200) cavity is connected to the second flow port (102S), and the other end of the valve core (200) cavity is connected to the third flow port (102E) or the fourth flow port (102C). The valve core (200) rotates about the central axis of the second flow port (102S). When the valve core (200) cavity is connected to the third flow port (102E), the valve core (200) cavity and the second flow port (102S) are connected. The valve core (200) cavity and the third flow port (102E) form a first flow channel. The valve cavity (101), the first flow port (102D), and the fourth flow port (102C) are connected and form a second flow channel spaced apart from the first flow channel. When the valve core (200) cavity is connected to the fourth flow port (102C), the valve core (200) cavity, the second flow port (102S), and the fourth flow port (102C) form a first flow channel. The valve cavity (101), the first flow port (102D), and the third flow port (102E) are connected and form a second flow channel spaced apart from the first flow channel. The first flow channel is used to flow low-pressure fluid, and the second flow channel is used to flow high-pressure fluid.

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