Four-way valve

Abstract

The utility model provides a four-way valve. The four-way valve comprises a valve body, a valve core, a valve cover and an annular sealing piece, the sealing piece is embedded in the inner side of the valve body, the valve element is rotatably embedded in the sealing piece, the valve deck is fixed to the upper end of the valve body in a sealed mode, and a transmission shaft is coaxially arranged at the upper end of the valve element. A medium inflow channel is arranged in the middle of the lower end of the valve body, and three medium outflow channels which are evenly distributed in the circumferential direction are arranged on the valve body located on the outer side of the medium inflow channel. Three overflowing holes are evenly distributed in the side wall of the sealing piece in the circumferential direction. A flow passing channel is formed in the valve element and provided with an inlet end and two outlet ends, the inlet end of the flow passing channel is located in the middle of the lower end of the valve element and communicates with the outflow end of the medium inflow channel, and the two outlet ends of the flow passing channel are evenly distributed on the side wall of the valve element in the circumferential direction; according to the utility model, on-off and flow control of each path of water flow can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control valves, and particularly relates to a four-way valve. Background Art

[0002] At present, the new energy vehicle industry in China is developing rapidly. Compared with fuel vehicles, the heat dissipation, heating, water circuit circulation and other systems of new energy vehicles are highly integrated, and each pipeline intersects with each other, requiring the use of multi-way water valves. However, there is no four-way valve for water circuit control on the market at present. Therefore, there is an urgent need for a four-way valve for water circuit control of new energy vehicles. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a four-way valve that can realize the on-off and flow control of each water flow.

[0004] The utility model provides a four-way valve, which includes a valve body, a valve core, a valve cover and an annular seal; the seal is embedded inside the valve body, the valve core is rotatably embedded in the seal, and the seal is used to circumferentially seal the gap between the outer side wall of the valve core and the inner side wall of the valve body. The valve cover is fixedly sealed at the upper end of the valve body. A transmission shaft is coaxially arranged at the upper end of the valve core. The upper end of the transmission shaft movably penetrates through the valve cover and extends out of the valve cover for driving connection with a driving component. The transmission shaft is rotationally sealed with the valve cover. A medium inflow channel is arranged in the middle of the lower end of the valve body. Three medium outflow channels are arranged on the valve body outside the medium inflow channel and are circumferentially and evenly distributed. The inflow end of each medium outflow channel extends to the inner side wall of the valve body, and the outflow end of each medium outflow channel extends to the lower end of the valve body. Three flow holes are circumferentially and evenly distributed on the side wall of the seal. The three flow holes are radially corresponding to the inflow ends of the three medium outflow channels one by one. An internal flow channel is arranged inside the valve core. The flow channel has an inlet end and two outlet ends. The inlet end of the flow channel is located in the middle of the lower end of the valve core and is communicated with the outflow end of the medium inflow channel. The two outlet ends of the flow channel are circumferentially and evenly distributed on the side wall of the valve core. When the valve core rotates relative to the valve body, only one or two of the medium outflow channels are communicated with the medium inflow channel through the flow channel.

[0005] The utility model can realize the on-off and flow control of each water flow to meet the water circuit control requirements of new energy vehicles.

[0006] In a possible implementation, an opening groove extending along the axial direction of the seal is provided on the side wall of the seal, and a limiting rib extending along the axial direction of the seal is provided on the inner wall of the valve body. The limiting rib is fitted into the opening groove. After adopting this structure, after the seal is inserted into the valve body, the opening groove can be fitted with the limiting rib. At this time, circumferential limitation can be achieved between the seal and the valve body, so that when the valve core rotates relative to the valve body, the situation where the seal rotates with the valve core can be avoided.

[0007] In a possible implementation, annular convex edges are provided on both the outer wall of the upper end and the outer wall of the lower end of the valve core. The outer edge of the annular convex edge is in sealing contact with the inner peripheral wall of the seal. Convex ribs are provided on both sides of each outlet end of the flow passage. The upper end of each convex rib is integrally connected to the annular convex edge located at the upper end of the valve core, and the lower end of each convex rib is integrally connected to the annular convex edge located at the lower end of the valve core. The outer end of each convex rib is in sealing contact with the inner side wall of the seal. After adopting this structure, after the valve core is assembled into the valve body, the annular convex edge located at the upper end of the valve core, the annular convex edge located at the lower end of the valve core, and the convex ribs located on both sides of each outlet end of the flow passage can all be in sealing contact with the inner side wall of the seal. In addition, after adopting this structure, the contact area between the valve core and the seal can be reduced as much as possible, so that the rotational damping of the valve core can be reduced, that is, when the driving component drives the transmission shaft and the valve core to rotate relative to the valve body, the rotation of the valve core can be made smoother.

[0008] In a possible implementation, an upward-extending annular convex platform is provided at the outflow end of the medium inflow passage. The annular convex platform is inserted into the inlet end of the flow passage. The side wall of the inlet end of the flow passage is in contact with the outer side wall of the annular convex platform. The valve core is rotatably connected to the annular convex platform. After adopting this structure, the inlet end of the flow passage located on the valve core can be reliably communicated with the outflow end of the medium inflow passage. In addition, since the annular convex platform is inserted into the inlet end of the flow passage and the side wall of the inlet end of the flow passage is in contact with the outer side wall of the annular convex platform, the coaxiality of the valve core and the valve body can be ensured, that is, the valve core can rotate more smoothly relative to the valve body.

[0009] In a possible implementation, an annular socket part sleeving the outside of the annular convex platform is provided in the middle of the lower end of the valve core. The inner side wall of the annular socket part is in contact with the outer side wall of the annular convex platform. The annular socket part is rotatably connected to the annular convex platform. The lower end of the annular socket part is supported on the inner bottom of the valve body. After adopting this structure, under the action of the annular socket part, the contact area between the lower end of the valve core and the inner bottom of the valve body can be effectively reduced, that is, the rotational friction between the valve core and the valve body can be reduced, so that the valve core can rotate more smoothly relative to the valve body. In addition, since the annular socket part sleeves the outside of the annular convex platform and is rotatably connected to the annular convex platform, the coaxiality of the valve core and the valve body can be further ensured.

[0010] In a possible implementation, a plurality of reinforcing ribs are provided at the connection between the annular socket part and the valve core, and the plurality of reinforcing ribs are circumferentially spaced apart; each reinforcing rib is integrally connected to the outer bottom of the valve core and the outer side wall of the annular socket part; after adopting this structure, under the action of the plurality of reinforcing ribs, the connection strength between the annular socket part and the outer bottom of the valve core can be improved, so as to avoid the fracture of the annular socket part.

[0011] In a possible implementation, two cavities with open upper ends are provided on the valve core, and the two cavities are circumferentially spaced apart from the two outlet ends of the flow passage; after adopting this structure, the weight of the valve core can be reduced, so that the valve core can be driven to rotate more easily, and the material used for the valve core can be reduced, so as to reduce the production cost of the valve core.

[0012] In a possible implementation, an annular step is provided on the inner wall of the upper end of the valve body, and an O-ring is embedded on the annular step. The O-ring is pressed against the annular step by the valve cover, and the O-ring is used to seal the gap between the valve cover and the valve body; after adopting this structure, under the action of the O-ring, the O-ring can reliably seal the gap between the valve cover and the valve body, that is, the valve cover can be reliably fixed to the upper end of the valve body in a sealed manner; an embedding groove is provided in the middle of the lower end of the valve cover, and a sealing ring is embedded in the embedding groove. The transmission shaft passes through the sealing ring, and the sealing ring is used to seal the gap between the transmission shaft and the valve cover; after adopting this structure, under the action of the sealing ring, the purpose of rotary sealing can be reliably achieved between the transmission shaft and the valve cover. In addition, the above-mentioned sealing ring can adopt a sealing ring with a cross-section of "X", and the "X"-shaped sealing ring has the advantage of strong deformation ability, so as to better seal the gap between the transmission shaft and the valve cover.

[0013] In a possible implementation, a spline shaft portion is formed at the upper end of the transmission shaft, and the spline shaft portion is used for mating and plugging with the driving end of the driving assembly and for transmission connection; after adopting this structure, under the action of the spline shaft portion, the upper end of the transmission shaft can be reliably and conveniently connected to the driving end of the driving assembly and achieve the purpose of transmission connection.

[0014] In a possible implementation, the four-way valve further includes a gasket, which is embedded in the lower end of the valve body, and the lower end of the gasket protrudes from the valve body; the gasket includes an inner ring portion and an outer ring portion arranged coaxially, and the inner ring portion and the outer ring portion are connected as a whole through a connecting portion; the inflow end of the medium inflow channel is located inside the inner ring portion, and the outflow ends of the three medium outflow channels are all located between the inner ring portion and the outer ring portion. Through holes corresponding to the outflow ends of each medium outflow channel are arranged vertically on the connecting portion; after adopting this structure, after the lower end of the valve body is fixed to the valve seat, the inflow end of the medium inflow channel on the valve body can communicate with the medium inlet on the valve seat, and the outflow ends of the three medium outflow channels on the valve body can respectively communicate with one of the medium outlets on the valve seat. The inner ring portion can achieve the circumferential sealing effect between the inflow end of the medium inflow channel and the medium inlet on the valve seat, and the gasket located outside each through hole can achieve the circumferential sealing effect between the outflow end of the corresponding medium outflow channel and the corresponding medium outlet on the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the first three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is the second three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 3 is the sectional structural schematic diagram of the present utility model;

[0018] Figure 4 is the first partially disassembled three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 5 is the second partially disassembled three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 6 is the third partially disassembled three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 7 is the flow rate relationship diagram of the three medium outflow channels when the valve core rotates. DETAILED IMPLEMENTATION MANNER

[0022] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0023] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified or limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0024] In the embodiments of the present application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] See Figures 1-6As shown in the figure, an embodiment of the present application discloses a four-way valve, which includes a valve body 1, a valve core 2, a valve cover 3, and an annular seal 4; the seal 4 is embedded inside the valve body 1, the valve core 2 is rotatably embedded in the seal 4, and the seal 4 is used to circumferentially seal the gap between the outer wall of the valve core 2 and the inner wall of the valve body 1. The valve cover 3 is fixedly sealed at the upper end of the valve body 1. A transmission shaft 21 is coaxially arranged at the upper end of the valve core 2. The upper end of the transmission shaft 21 movably penetrates through the valve cover 3 and extends out of the valve cover 3 and is used for driving connection with a driving assembly. The transmission shaft 21 is rotationally sealed with the valve cover 3. A medium inflow channel 11 is arranged in the middle of the lower end of the valve body 1. Three medium outflow channels 12 are arranged on the valve body 1 outside the medium inflow channel 11 and are circumferentially and evenly distributed. The inflow end of each medium outflow channel 12 extends to the inner wall of the valve body 1, and the outflow end of each medium outflow channel 12 extends to the lower end of the valve body 1. Three flow holes 41 are circumferentially and evenly distributed on the side wall of the seal 4. The three flow holes 41 are radially corresponding to the inflow ends of the three medium outflow channels 12 one by one. An internal flow channel 22 is arranged inside the valve core 2. The internal flow channel 22 has an inlet end and two outlet ends. The inlet end of the internal flow channel 22 is located in the middle of the lower end of the valve core 2 and is communicated with the outflow end of the medium inflow channel 11. The two outlet ends of the internal flow channel 22 are circumferentially and evenly distributed on the side wall of the valve core 2. When the valve core 2 rotates relative to the valve body 1, only one or two of the medium outflow channels 12 are communicated with the medium inflow channel 11 through the internal flow channel 22. In the present application, the three medium outflow channels are arranged at intervals of 120 degrees in the circumferential direction of the valve body, and the two outlet ends of the internal flow channel are arranged at intervals of 180 degrees in the circumferential direction of the valve core.

[0027] An opening groove 42 extending along the axial direction of the seal 4 is arranged on the side wall of the seal 4. A limiting rib 13 is arranged on the inner wall of the valve body 1. The limiting rib 13 extends along the axial direction of the seal 4, and the limiting rib 13 is fitted in the opening groove 42. After adopting this structure, after the seal is embedded into the valve body, the opening groove can be fitted with the limiting rib. At this time, circumferential limitation between the seal and the valve body can be achieved, so that when the valve core rotates relative to the valve body, the situation that the seal rotates with the valve core can be avoided.

[0028] On the outer wall of the upper end and the outer wall of the lower end of the valve core 2, annular convex edges 23 are provided. The outer edge of the annular convex edge 23 is in sealing fit with the inner peripheral wall of the seal 4; on both sides of each outlet end of the flow-through channel 22, convex ribs 24 are provided. The upper end of each convex rib 24 is integrally connected to the annular convex edge 23 located at the upper end of the valve core 2, and the lower end of each convex rib 24 is integrally connected to the annular convex edge 23 located at the lower end of the valve core 2. The outer end of each convex rib 24 is in sealing fit with the inner side wall of the seal 4; after adopting this structure, after the valve core is assembled into the valve body, the annular convex edge at the upper end of the valve core, the annular convex edge at the lower end of the valve core, and the convex ribs on both sides of each outlet end of the flow-through channel can all be in sealing fit with the inner side wall of the seal. In addition, after adopting this structure, the contact area between the valve core and the seal can be reduced as much as possible, thereby reducing the rotational damping of the valve core. That is, when the driving assembly drives the transmission shaft and the valve core to rotate relative to the valve body, the rotation of the valve core can be made smoother.

[0029] At the outflow end of the medium inflow channel 11, an upward-extending annular boss 14 is provided. The annular boss 14 is inserted into the inlet end of the flow-through channel 22. The side wall of the inlet end of the flow-through channel 22 is in contact with the outer side wall of the annular boss 14, and the valve core 2 is rotatably connected to the annular boss 14; after adopting this structure, the inlet end of the flow-through channel on the valve core can be reliably communicated with the outflow end of the medium inflow channel. In addition, since the annular boss is inserted into the inlet end of the flow-through channel and the side wall of the inlet end of the flow-through channel is in contact with the outer side wall of the annular boss, the coaxiality of the valve core and the valve body can be ensured, that is, the valve core can rotate more smoothly relative to the valve body.

[0030] In the middle of the lower end of the valve core 2, an annular socket part 25 sleeved on the outside of the annular boss 14 is provided. The inner side wall of the annular socket part 25 is in contact with the outer side wall of the annular boss 14. The annular socket part 25 is rotatably connected to the annular boss 14, and the lower end of the annular socket part 25 supports on the inner bottom of the valve body 1; after adopting this structure, under the action of the annular socket part, the contact area between the lower end of the valve core and the inner bottom of the valve body can be effectively reduced, that is, the rotational friction between the valve core and the valve body can be reduced, so that the valve core can rotate more smoothly relative to the valve body. In addition, since the annular socket part is sleeved on the outside of the annular boss and is rotatably connected to the annular boss, the coaxiality of the valve core and the valve body can be further ensured.

[0031] At the connection between the annular socket part 25 and the valve core 2, a plurality of reinforcing ribs 26 are provided at circumferential intervals. Each reinforcing rib 26 is integrally connected to the outer bottom of the valve core 2 and the outer side wall of the annular socket part 25; after adopting this structure, under the action of the plurality of reinforcing ribs, the connection strength between the annular socket part and the outer bottom of the valve core can be improved to avoid the fracture of the annular socket part.

[0032] There are two concave cavities 27 with open upper ends provided on the valve core 2, and the two concave cavities 27 are circumferentially spaced from the two outlet ends of the flow passage 22; after adopting this structure, the weight of the valve core can be reduced, so that the valve core can be more easily driven to rotate, and the material used for the valve core can be reduced to lower the production cost of the valve core.

[0033] An annular step 15 is provided on the inner wall of the upper end of the valve body 1, and an O-ring 5 is embedded on the annular step 15. The O-ring 5 is pressed against the annular step 15 by the valve cover 3, and the O-ring 5 is used to seal the gap between the valve cover 3 and the valve body 1; after adopting this structure, under the action of the O-ring, the O-ring can reliably seal the gap between the valve cover and the valve body, that is, the valve cover can be reliably fixed to the upper end of the valve body in a sealed manner; an embedding groove 31 is provided in the middle of the lower end of the valve cover 3, and a sealing ring 6 is embedded in the embedding groove 31. The transmission shaft 21 is arranged through the sealing ring 6, and the sealing ring 6 is used to seal the gap between the transmission shaft 21 and the valve cover 3; after adopting this structure, under the action of the sealing ring, the purpose of reliable rotary sealing can be achieved between the transmission shaft and the valve cover. In addition, the above-mentioned sealing ring can adopt a sealing ring with a cross-section of "X", and the "X"-shaped sealing ring has the advantage of strong deformation ability to better seal the gap between the transmission shaft and the valve cover.

[0034] The upper end of the transmission shaft 21 forms a spline shaft portion 211, and the spline shaft portion 211 is used for mating and plugging with the driving end of the driving assembly and for transmission connection; after adopting this structure, under the action of the spline shaft portion, the upper end of the transmission shaft can be reliably and conveniently connected to the driving end of the driving assembly and achieve the purpose of transmission connection.

[0035] The four-way valve further includes a gasket 7, and the gasket 7 is embedded in the lower end of the valve body 1, and the lower end of the gasket 7 protrudes from the valve body 1; the gasket 7 includes an inner ring portion 71 and an outer ring portion 72 arranged coaxially, and the inner ring portion 71 and the outer ring portion 72 are connected into one body through a connecting portion 73; the inflow end of the medium inflow passage 11 is located inside the inner ring portion 71, and the outflow ends of the three medium outflow passages 12 are all located between the inner ring portion 71 and the outer ring portion 72, and through holes 731 corresponding to the outflow ends of each medium outflow passage 12 are provided on the connecting portion 73; after adopting this structure, after the lower end of the valve body is fixed to the valve seat, the inflow end of the medium inflow passage on the valve body can be communicated with the medium inlet on the valve seat, and the outflow ends of the three medium outflow passages on the valve body can be respectively communicated with one of the medium outlets on the valve seat. The inner ring portion can realize the circumferential sealing effect between the inflow end of the medium inflow passage and the medium inlet on the valve seat, and the gasket located outside each through hole can realize the circumferential sealing effect between the outflow end of the corresponding medium outflow passage and the corresponding medium outlet on the valve seat.

[0036] Such asFigure 7 As shown Figure 7 is a flow rate relationship diagram of three medium outflow channels when the valve core rotates. Outlet1, Outlet2, and Outlet3 respectively correspond to the flow rate of a medium outflow channel. And when the valve core rotates relative to the valve body, only one or two of the medium outflow channels are in communication with the medium inflow channel through the flow channel. In addition, within each interval of 120 degrees of rotation of the valve core relative to the valve body, the flow rate of one of the medium outflow channels is zero, the flow rate of one of the other two medium outflow channels gradually increases until it reaches the maximum value, and the flow rate of the other of the other two medium outflow channels gradually decreases until it drops to zero, and so on in a cycle.

[0037] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A four-way valve, characterized in that: The invention comprises a valve body (1), a valve core (2), a valve cover (3) and a ring-shaped sealing member (4); the sealing member (4) is embedded in the inner side of the valve body (1), the valve core (2) is rotatably embedded in the sealing member (4), the sealing member (4) is used to circumferentially seal the gap between the outer side wall of the valve core (2) and the inner side wall of the valve body (1), the valve cover (3) is sealingly fixed to the upper end of the valve body (1), and the upper end of the valve core (2) is coaxially arranged A transmission shaft (21) is provided, the upper end of the transmission shaft (21) movably passes through the valve cover (3) and then extends out of the valve cover (3) and is used for transmission connection with the driving component, and the transmission shaft (21) and the valve cover (3) are rotationally sealed; a medium inflow channel (11) is provided in the middle of the lower end of the valve body (1), and three medium outflow channels (12) uniformly distributed in the circumferential direction are provided on the valve body (1) outside the medium inflow channel (11), and each of the medium outflow channels (12) The inflow ends of the medium outflow channels (2) extend to the inner side wall of the valve body (1), and the outflow ends of each medium outflow channel (12) extend to the lower end of the valve body (1); three flow holes (41) are evenly distributed circumferentially on the side wall of the sealing member (4), and the three flow holes (41) are radially corresponding to the inflow ends of the three medium outflow channels (12); a flow channel (22) is provided inside the valve core (2), and the flow channel (22) has a The valve body (2) has an inlet end and two outlet ends, the inlet end of the flow passage (22) is located in the middle of the lower end of the valve core (2) and is connected to the outlet end of the medium inlet passage (11), and the two outlet ends of the flow passage (22) are arranged on the side wall of the valve core (2) in a circumferentially uniformly distributed manner; when the valve core (2) rotates relative to the valve body (1), only one or two of the medium outflow passages (12) are connected to the medium inflow passage (11) through the flow passage (22).

2. The four-way valve according to claim 1, characterized in that: An open groove (42) extending along the axial direction of the seal (4) is provided on the side wall of the seal (4), and a limiting rib (13) is provided on the inner wall of the valve body (1), wherein the limiting rib (13) extends along the axial direction of the seal (4), and the limiting rib (13) is embedded in the open groove (42).

3. The four-way valve according to claim 1 or 2, characterized in that: An annular convex edge (23) is provided on the outer wall of the upper end and the outer wall of the lower end of the valve core (2), and the outer edge of the annular convex edge (23) is sealed against the inner peripheral wall of the sealing member (4); convex ribs (24) are provided on both sides of each outlet end of the flow passage (22), and the upper end of each convex rib (24) is connected to the annular convex edge (23) located at the upper end of the valve core (2), and the lower end of each convex rib (24) is connected to the annular convex edge (23) located at the lower end of the valve core (2), and the outer end of each convex rib (24) is sealed against the inner side wall of the sealing member (4).

4. The four-way valve according to claim 1, characterized in that: An upwardly extending annular boss (14) is provided at the outflow end of the medium inflow channel (11); the annular boss (14) is inserted into the inlet end of the flow channel (22); the side wall of the inlet end of the flow channel (22) is in contact with the outer side wall of the annular boss (14); and the valve core (2) is rotatably connected to the annular boss (14).

5. The four-way valve according to claim 4, characterized in that: An annular sleeve portion (25) is provided in the middle of the lower end of the valve core (2) and is sleeved on the outside of the annular boss (14). The inner wall of the annular sleeve portion (25) is in contact with the outer wall of the annular boss (14). The annular sleeve portion (25) is rotatably connected to the annular boss (14). The lower end of the annular sleeve portion (25) is supported on the inner bottom of the valve body (1).

6. The four-way valve according to claim 5, characterized in that: A plurality of reinforcing ribs (26) are provided at the connection between the annular sleeve portion (25) and the valve core (2) and are distributed at intervals in the circumferential direction. Each of the reinforcing ribs (26) is integrally connected to the outer bottom of the valve core (2) and the outer side wall of the annular sleeve portion (25).

7. The four-way valve according to claim 1, characterized in that: The valve core (2) is provided with two concave cavities (27) both of which are open at the upper ends. The two concave cavities (27) and the two outlet ends of the flow passage (22) are spaced apart and distributed along the circumferential direction of the valve core (2).

8. The four-way valve according to claim 1, characterized in that: An annular step (15) is provided on the inner wall of the upper end of the valve body (1), an O-ring (5) is embedded on the annular step (15), the O-ring (5) is pressed against the annular step (15) through the valve cover (3), and the O-ring (5) is used to seal the gap between the valve cover (3) and the valve body (1); an embedding groove (31) is provided in the middle of the lower end of the valve cover (3), a sealing ring (6) is embedded in the embedding groove (31), the transmission shaft (21) is inserted into the sealing ring (6), and the sealing ring (6) is used to seal the gap between the transmission shaft (21) and the valve cover (3).

9. The four-way valve according to claim 1, characterized in that: A spline shaft portion (211) is formed at the upper end of the transmission shaft (21), and the spline shaft portion (211) is used to be plugged in and transmission-connected with the driving end of the driving assembly.

10. The four-way valve according to claim 1, characterized in that: The four-way valve further comprises a sealing gasket (7), wherein the sealing gasket (7) is embedded in the lower end of the valve body (1), and the lower end of the sealing gasket (7) protrudes from the valve body (1); the sealing gasket (7) comprises an inner ring portion (71) and an outer ring portion (72) which are coaxially arranged, and the inner ring portion (71) and the outer ring portion (72) are connected to each other via a connecting portion (73); the inflow end of the medium inflow channel (11) is located on the inner side of the inner ring portion (71), and the outflow ends of the three medium outflow channels (12) are all located between the inner ring portion (71) and the outer ring portion (72), and the connecting portion (73) is provided with through holes (731) which correspond vertically to the outflow ends of each medium outflow channel (12).

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