A multi-way valve

Abstract

The utility model relates to a multi-way valve, comprising a valve cavity, a plurality of valve ports connected to the valve cavity, and a valve core for controlling the conduction of the plurality of valve ports. The valve core rotates around a rotation axis, and the valve cavity and the valve core are arranged adjacent to each other along the axial direction of the rotation axis. The valve cavity is divided into a plurality of sub-valve cavities, each valve port is connected to a corresponding sub-valve cavity, and the opening of the sub-valve cavity faces the valve core. The valve core comprises a cylindrical annular wall, a top cover and a bottom plate respectively closing the two open ends of the annular wall, and the annular wall, the top cover and the bottom plate form a cavity; the bottom plate is provided with two openings connected to the cavity. The bottom plate covers the openings of the plurality of sub-valve cavities, and conducts the corresponding openings of two or more sub-valve cavities through the two openings when the valve core rotates. The utility model can reduce the radial dimension of the multi-way valve and reduce the difficulty of sealing between the valve core and the valve cavity.

Description

[Technical field]

[0001] The utility model relates to a multi-way valve, which can be used to control the flow direction and flow rate of the cooling liquid of an automobile, but is not limited to the application field. [Background technology]

[0002] The valve cavity of a traditional multi-way valve is provided with three or more valve ports, and the valve core rotates in the valve cavity to control the conduction of the corresponding valve ports, such as conduction or closing, increase or decrease of the conduction area, etc. The radial dimension of the multi-way valve of this structure is large, and the sealing difficulty between the circumferential surface of the valve core and the corresponding valve ports is also large. Therefore, an improved solution is urgently needed. [Contents of the utility model]

[0003] One object of the present application is to reduce the radial size of a multi-way valve and reduce the difficulty of sealing.

[0004] To this end, the utility model provides a multi-way valve, comprising a valve cavity, a plurality of valve ports connected to the valve cavity, and a valve core for controlling the conduction of the plurality of valve ports, wherein: the valve core rotates around a rotation axis, and the valve cavity and the valve core are arranged adjacent to each other along the axial direction of the rotation axis; the valve cavity is divided into a plurality of sub-valve cavities, each valve port is connected to a corresponding sub-valve cavity, and the opening of the sub-valve cavity faces the valve core; the valve core comprises a cylindrical annular wall, a top cover and a bottom plate which respectively close the two open ends of the annular wall, and the annular wall, the top cover and the bottom plate form a cavity; the bottom plate is provided with two openings connected to the cavity; the bottom plate covers the openings of the plurality of sub-valve cavities, and conducts the corresponding openings of two or more sub-valve cavities through the two openings when the valve core rotates.

[0005] In one embodiment of the present invention, the plurality of sub-valve chambers are distributed along the circumferential direction of the rotation axis, and adjacent sub-valve chambers are separated by partitions.

[0006] In one embodiment of the utility model, a sealing member is further included, wherein the sealing member is clamped between the partition plate and the bottom plate and is used to enhance the sealing between the opening edges of the plurality of sub-valve chambers and the bottom plate.

[0007] In one embodiment of the utility model, the valve cavity is provided with a central hub, and the partition extends from the central hub to the side wall of the valve cavity; the valve core is fixedly mounted to the rotating shaft, and one end of the rotating shaft is rotatably mounted to the central hub.

[0008] In one embodiment of the utility model, the multi-way valve includes a first shell and a second shell, and the first shell and the second shell are buckled together along the axial direction of the rotating shaft; the valve cavity and the valve core are located in the space formed by the first shell and the second shell, and are limited by the first shell and the second shell to maintain sealing contact.

[0009] In one embodiment of the utility model, the central hub, the partition and the side wall are provided with grooves; the multi-way valve also includes a sealing member, the sealing member includes a central portion, an outer ring portion surrounding the central portion, and a rib portion extending outward from the central portion and connected to the outer ring portion; the central portion, the outer ring portion and the rib portion of the sealing member are respectively accommodated in the corresponding grooves of the central hub, the partition and the side wall; the valve core-proximal side of the sealing member is in sealing contact with the bottom plate.

[0010] In one embodiment of the present utility model, the multi-way valve is a four-way valve, and the plurality of sub-valve chambers include a first sub-valve chamber, a third sub-valve chamber, a fourth sub-valve chamber and a second sub-valve chamber arranged in sequence along the circumferential direction of the rotation axis; the plurality of valve ports include a first valve port, a second valve port, a third valve port and a fourth valve port, and are respectively connected to the first sub-valve chamber, the second sub-valve chamber, the third sub-valve chamber and the fourth sub-valve chamber; the first sub-valve chamber, the second sub-valve chamber, the third sub-valve chamber and the fourth sub-valve chamber are arranged along the circumferential direction of the rotation axis, and each sub-valve chamber is fan-shaped or fan-shaped.

[0011] In one embodiment of the utility model, the central angle corresponding to the fourth sub-valve chamber is 1.4 to 1.6 times the central angle corresponding to the second sub-valve chamber, the central angle corresponding to the third sub-valve chamber is 3.4 to 3.6 times the central angle corresponding to the second sub-valve chamber, and the central angle corresponding to the first sub-valve chamber is 2.9 to 3.1 times the central angle corresponding to the second sub-valve chamber.

[0012] In one embodiment of the present utility model, the central angle corresponding to the second sub-valve cavity is 35 degrees to 45 degrees.

[0013] In one embodiment of the utility model, the central angle corresponding to the second sub-valve chamber is 40 degrees, the central angle corresponding to the fourth sub-valve chamber is 1.5 times the central angle corresponding to the second sub-valve chamber, the central angle corresponding to the third sub-valve chamber is 3.5 times the central angle corresponding to the second sub-valve chamber, and the central angle corresponding to the first sub-valve chamber is 3 times the central angle corresponding to the second sub-valve chamber.

[0014] In one embodiment of the utility model, the two openings of the bottom plate are a first opening and a second opening, and the first opening and the second opening enable the multi-way valve to have at least three of the following working modes when the bottom plate is rotated to different positions:

[0015] The first opening is connected to the first sub-valve chamber, and the second opening is connected to the third sub-valve chamber;

[0016] The first opening is connected to the first sub-valve chamber, and the second opening is connected to the fourth sub-valve chamber and the third sub-valve chamber;

[0017] The first opening is connected to the first sub-valve chamber, and the second opening is connected to the fourth sub-valve chamber;

[0018] The first opening is connected to the third sub-valve chamber, and the second opening is connected to the second sub-valve chamber;

[0019] The first opening is connected to the third sub-valve chamber, and the second opening is connected to the first sub-valve chamber;

[0020] The first opening is communicated with the third sub-valve chamber and the fourth sub-valve chamber, and the second opening is communicated with the first sub-valve chamber.

[0021] The utility model arranges the valve cavity and the valve core adjacent to each other along the axial direction of the valve core rotation axis, which can reduce the radial size of the multi-way valve. In addition, under this scheme, the contact surface between the valve core and the valve cavity is a plane, thereby reducing the difficulty of sealing between the valve core and the valve cavity port.

Brief Description of the Drawings

[0022] To further reveal the specific technical content of this case, please first refer to the attached drawings, among which:

[0023] Figure 1 A schematic diagram of a multi-way valve provided in one embodiment of the utility model;

[0024] Figure 2 yes Figure 1 An exploded schematic diagram of the multi-port valve shown;

[0025] Figure 3 yes Figure 2 A schematic diagram of a sealing member of the multi-way valve for enhancing the sealing performance between the valve cavity opening and the valve core;

[0026] Figure 4 yes Figure 2 A schematic diagram of a first housing of the multi-way valve is shown, wherein the first housing forms a valve chamber;

[0027] Figure 5 yes Figure 4 A front view of the first housing shown;

[0028] Figure 6 yes Figure 5 AA cross-sectional schematic diagram of the first shell shown;

[0029] Figure 7 yes Figure 2 A schematic diagram of a valve core of a multi-way valve is shown;

[0030] Figure 8 yes Figure 7 The schematic diagram of the valve core after removing the top cover and the shaft is shown;

[0031] Fig. 9 yes Figure 2 A schematic diagram of a first housing of the multi-way valve shown;

[0032] Figures 10 to 16 They are Figure 2 Schematic diagrams of the first working mode, the second working mode, the third working mode, the fourth working mode, the fifth working mode, the sixth working mode and the seventh working mode of the multi-way valve are shown. [Specific implementation method]

[0033] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings of the present invention.

[0034] Please refer to Figure 1 and Figure 2 The valve housing of a multi-way valve 100 provided in one embodiment of the utility model comprises a first housing 10 and a second housing 80 which are buckled together. The second housing 80 is provided with a plurality of connecting holes 82 for connecting members such as screws or threaded rods to pass through so as to be fixedly connected to the first housing 10.

[0035] The first housing 10 has a valve cavity formed inside, which is divided into a plurality of sub-valve cavities, such as sub-valve cavities 21, 23, etc. The first housing 10 is connected to a plurality of valve ports, each of which is connected to a corresponding sub-valve cavity. In this embodiment, the multi-way valve 100 is a four-way valve, and the first housing 10 is provided with a first valve port 11, a second valve port 12, a third valve port 13, and a fourth valve port 14. The first valve port 11, the second valve port 12, the third valve port 13, and the fourth valve port 14 are connected to the first sub-valve cavity 21, the second sub-valve cavity 22 (see Figure 4 ), the third sub-valve chamber 23 and the fourth sub-valve chamber 24 (see Figure 4 ) connected.

[0036] The multi-way valve 100 further includes a valve core 60 housed in a space formed by the first housing 10 and the second housing 80. The valve core 60 can rotate about a rotation axis to control the conduction of the valve port. In this embodiment, the valve core 60 is fixedly mounted to the rotating shaft 67 and is rotatably mounted to the valve housing through the rotating shaft 67. The second housing 80 is provided with a through hole 84 for the distal valve cavity end 69 (see FIG. 1 ) of the rotating shaft 67. Figure 7 ) to receive external drive. When the shaft 67 is driven by the external drive to rotate, the valve core 60 rotates accordingly. Fig. 9 As shown, a bearing or a bushing 85 may be provided in the through hole 84 of the second housing 80 to better support the rotation of the rotating shaft 67 .

[0037] The valve cavity and the valve core 60 are arranged adjacent to each other along the axial direction of the rotation axis. In this way, the radial dimension of the multi-way valve 100 can be reduced. The openings of each sub-valve cavity of the valve cavity face the valve core 60. The multi-way valve 100 also includes a seal 40 installed at the opening of the sub-valve cavity, and the seal 40 is clamped between the opening of each sub-valve cavity and the valve core 60, and is used to strengthen the sealing between the openings of several sub-valve cavities and the valve core 60. Compared with the traditional solution in which the valve core is arranged in the valve cavity, the sealing surface between the valve core and the valve cavity opening (or valve port) in the traditional solution is often a curved surface, which makes sealing difficult; while in the utility model, the openings of each valve cavity can be arranged on a plane to facilitate sealing.

[0038] Please refer to Figure 3 and Figure 4 The valve cavity is provided with a central hub 30, and a partition 34 extends from the central hub 30 to the side wall 36 of the valve cavity, thereby dividing the valve cavity into a first sub-valve cavity 21, a second sub-valve cavity 22, a third sub-valve cavity 23 and a fourth sub-valve cavity 24. The four sub-valve cavities are distributed along the circumferential direction of the central hub 30. In this embodiment, the first sub-valve cavity 21, the third sub-valve cavity 23, the second sub-valve cavity 22 and the fourth sub-valve cavity 24 are arranged in sequence along the circumferential direction of the central hub 30. The top end of the central hub 30 is provided with a mounting hole 38 for supporting the near-valve cavity end 68 (see FIG. 6 ) of the rotating shaft 67 of the valve core 60. Figure 7 ).

[0039] The center hub 30, the partition 34 and the top of the side wall 36 are respectively provided with a groove 31, a groove 35 and a groove 37. The seal 40 includes a center portion 41, an outer ring portion 47 surrounding the center portion 41, and a plurality of ribs 45 extending outward from the center portion 41 and connected to the outer ring portion 47. The center portion 41, the outer ring portion 47 and the ribs 45 of the seal 40 are respectively mounted to the groove 31 of the center hub, the groove 35 of the corresponding partition and the corresponding groove 67 of the side wall. The seal 40 is in sealing contact with the valve core 60. Preferably, the valve cavity and the valve core 60 are limited by the first housing 10 and the second housing 80 to maintain the sealing contact between the opening edge of the sub-valve cavity and the valve core 60.

[0040] Please refer to Figures 5 to 8 The valve core 60 includes a cylindrical annular wall 61, a top cover 63 and a bottom plate 62 which respectively close the two open ends of the annular wall. The annular wall 61, the top cover 63 and the bottom plate 62 form a cavity. The bottom plate 62 is provided with two openings 65a and 65b which are connected to the cavity. After assembly, the bottom plate 62 of the valve core 60 covers the openings of each sub-valve cavity. When the valve core 60 rotates, the two openings 65a and 65b of the bottom plate 62 are connected to the corresponding openings of the two or more sub-valve cavities. In this embodiment, a central hub 66 is also provided in the valve core 60, and the two ends of the central hub 66 are respectively connected to the bottom plate 62 and the top cover 63. The central hub 66 is fixedly connected to the rotating shaft 67 through a central through hole 66a.

[0041] As mentioned above, the first housing 10 and the second housing 80 are snap-fitted and connected, and the two ends 68 and 69 of the rotating shaft 67 of the valve core 60 are respectively mounted to the mounting hole 38 of the central hub 30 of the first housing 10 and the through hole 84 of the second housing 80. Therefore, the rotation axis of the valve core 60, the central axis of the rotating shaft 67, and the axial center line of the central hub 30 coincide.

[0042] In this embodiment, the partition 34 extends radially, and the first sub-valve chamber 21, the third sub-valve chamber 23, the fourth sub-valve chamber 24 and the second sub-valve chamber 22 are arranged along the circumferential direction of the central hub 30. Figure 6 The sub-valve chambers are arranged in a clockwise direction in the viewing direction. The shape of each sub-valve chamber is a fan ring. It can be understood that the cross-sectional shape of each sub-valve chamber in the vertical axis is close to a fan shape or a fan shape.

[0043] The center angle corresponding to the fourth sub-valve chamber 24 is 1.4 to 1.6 times the center angle corresponding to the second sub-valve chamber 22, the center angle corresponding to the third sub-valve chamber 23 is 3.4 to 3.6 times the center angle corresponding to the second sub-valve chamber 22, and the center angle corresponding to the first sub-valve chamber 21 is 2.9 to 3.1 times the center angle corresponding to the second sub-valve chamber 22. The center angle corresponding to the second sub-valve chamber 22 is 35 degrees to 45 degrees. In one embodiment, the center angle corresponding to the second sub-valve chamber 22 is 40 degrees, the center angle corresponding to the fourth sub-valve chamber 24 is 1.5 times the center angle corresponding to the second sub-valve chamber 22, the center angle corresponding to the third sub-valve chamber 23 is 3.5 times the center angle corresponding to the second sub-valve chamber 22, and the center angle corresponding to the first sub-valve chamber 21 is 3 times the center angle corresponding to the second sub-valve chamber 22.

[0044] By setting the positions and sizes of the two openings 65a and 65b of the bottom plate 62 of the valve core 60, the four-way valve can have multiple working modes during the rotation of the valve core 60. For ease of description, the two openings 65a and 65b of the bottom plate 62 are respectively referred to as the first opening 65a and the second opening 65b. By setting the positions and sizes of the first opening 65a and the second opening 65b on the bottom plate 62, the multi-way valve 100 can have the following multiple working modes when the bottom plate 62 rotates to different positions. Figures 10 to 16 Provide explanation.

[0045] Please refer to Fig.10 In this embodiment, the first opening 65a and the second opening 65b are arranged in a circumferential direction with the center of the valve core 60 as the center and the distance between the center angle is between 150 degrees and 170 degrees. Fig.10In the state shown, the first opening 65a of the valve core 60 is connected to the first sub-valve chamber 21, more specifically, the first opening 65a is located in the middle of the first sub-valve chamber 21 and biased towards the second sub-valve chamber 22; the second opening 65b of the valve core 60 is connected to the third sub-valve chamber 23, more specifically, the second opening 65b is located at one end of the third sub-valve chamber 23 close to the fourth sub-valve chamber 24. In this way, the first sub-valve chamber 21 is connected to the third sub-valve chamber 23, that is, the first valve port 11 and the third valve port 13 are connected. For the convenience of description, this is called the first working mode.

[0046] exist Fig.10 In the viewing direction shown, the valve core 60 rotates clockwise, and the Fig.10 The first working mode shown is switched to Fig.11 The second working mode shown. Fig.11 As shown, in the second working mode, the first opening 65a of the valve core 60 remains connected to the first sub-valve chamber 21, for example, located at the center of the first sub-valve chamber 21; the second opening 65b of the valve core 60 rotates to the intersection of the third sub-valve chamber 23 and the fourth sub-valve chamber 24, and is simultaneously connected to the third sub-valve chamber 23 and the fourth sub-valve chamber 24. In this way, the first sub-valve chamber 21 is simultaneously connected to the third sub-valve chamber 23 and the fourth sub-valve chamber 24, that is, the first valve port 11 is simultaneously connected to the third valve port 13 and the fourth valve port 14.

[0047] exist Fig.11 In the viewing direction shown, the valve core 60 continues to rotate clockwise, and the Fig.11 The second working mode shown is switched to Fig.12 The third working mode shown. Fig.12 As shown, in the third working mode, the first opening 65a of the valve core 60 remains connected to the first sub-valve chamber 21, more specifically, the first opening 65a is located in the middle of the first sub-valve chamber 21 and biased toward the third sub-valve chamber 23; the second opening 65b of the valve core 60 is connected to the fourth sub-valve chamber 24, more specifically, the second opening 65b is located at one end of the fourth sub-valve chamber 24 close to the third sub-valve chamber 23. In this way, the first sub-valve chamber 21 is connected to the fourth sub-valve chamber 24, that is, the first valve port 11 and the fourth valve port 14 are connected.

[0048] exist Fig.12 In the viewing direction shown, the valve core 60 continues to rotate clockwise, and the Fig.12 The third working mode shown is switched to Fig.13 The fourth working mode shown. Fig.13As shown, the valve port communication in the fourth working mode is the same as that in the third mode, except that the positions of the two openings 65a and 65b of the valve core are different. More specifically, in the fourth working mode, the first opening 65a is located at one end of the first sub-valve chamber 21 close to the third sub-valve chamber 23, and the second opening 65b is located at one end of the fourth sub-valve chamber 24 close to the second sub-valve chamber 22. In this way, the first sub-valve chamber 21 is connected to the fourth sub-valve chamber 24, that is, the first valve port 11 and the fourth valve port 14 are connected.

[0049] exist Fig.13 In the viewing direction shown, the valve core 60 continues to rotate clockwise, and the Fig.13 The fourth working mode shown is switched to Fig.14 The fifth working mode shown in FIG. Fig.14 As shown, in the fifth working mode, the first opening 65a of the valve core 60 is connected to the third sub-valve chamber 23, and more specifically, the first opening 65a is located at one end of the third sub-valve chamber 23 close to the first sub-valve chamber 21. The second opening 65b of the valve core 60 is connected to the second sub-valve chamber 22. In this way, the third sub-valve chamber 23 and the second sub-valve chamber 22 are connected, that is, the third valve port 13 and the second valve port 13 are connected. In this embodiment, the size of the second opening 65b of the valve core 60 is the same as the opening size of the second sub-valve chamber 22.

[0050] exist Fig.14 In the viewing direction shown, the valve core 60 continues to rotate clockwise, and the Fig.14 The fifth working mode shown is switched to Fig.15 The sixth working mode shown in FIG. Fig.15 As shown, in the sixth working mode, the first opening 65a of the valve core 60 remains in communication with the third sub-valve chamber 23, more specifically, the first opening 65a is located in the middle section of the third sub-valve chamber 23 slightly biased toward the first sub-valve chamber 21. The second opening 65b of the valve core 60 is in communication with the first sub-valve chamber 21, more specifically, the second opening 65b is located at one end of the first sub-valve chamber 21 close to the second sub-valve chamber 22. In this way, the third sub-valve chamber 23 is communicated with the first sub-valve chamber 21, that is, the third valve port 13 is communicated with the first valve port 11.

[0051] exist Fig.15 In the viewing direction shown, the valve core 60 continues to rotate clockwise, and the Fig.15 The sixth working mode shown is switched to Fig.16 The seventh working mode is shown in FIG. Fig.16As shown, the valve port communication in the seventh working mode is the same as that in the first working mode, except that the positions of the first opening 65a and the second opening 65b in the seventh working mode are opposite to those in the first working mode. In the seventh working mode, the first opening 65a of the valve core 60 is located at the intersection of the third sub-valve chamber 23 and the fourth sub-valve chamber 24, and simultaneously conducts the third sub-valve chamber 23 and the fourth sub-valve chamber 24; the second opening 65b is located at one end of the first sub-valve chamber 21 close to the third sub-valve chamber 23. In this way, the third sub-valve chamber 23 and the fourth sub-valve chamber 24 are simultaneously communicated with the first sub-valve chamber 21, that is, the third valve port 13 and the fourth valve port 14 are simultaneously communicated with the first valve port 11.

[0052] Understandably, if the valve core 60 continues to rotate clockwise, there may be more working modes. During the switching process of the aforementioned various working modes, the conductivity or the conductive area between the first opening 65a, the second opening 65b of the valve core 60 and the opening of the corresponding sub-valve cavity will change, thereby controlling the connectivity between the corresponding valve ports and the size of the flow rate.

[0053] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A multi-way valve, comprising a valve cavity, a plurality of valve ports communicating with the valve cavity, and a valve core for controlling the conduction of the plurality of valve ports, characterized in that: The valve core rotates around a rotation axis, and the valve cavity and the valve core are arranged adjacent to each other along the axial direction of the rotation axis; The valve cavity is divided into a plurality of sub-valve cavities, each valve port is connected to a corresponding sub-valve cavity, and the opening of the sub-valve cavity faces the valve core; The valve core includes a cylindrical ring wall, a top cover and a bottom plate which respectively close the two open ends of the ring wall, and the ring wall, the top cover and the bottom plate form a cavity; the bottom plate is provided with two openings which are connected to the cavity; the bottom plate covers the openings of the several sub-valve chambers, and when the valve core rotates, the corresponding openings of two or more sub-valve chambers are connected through the two openings.

2. The multi-way valve according to claim 1, characterized in that: The plurality of sub-valve chambers are distributed along the circumferential direction of the rotation axis, and adjacent sub-valve chambers are separated by partitions.

3. The multi-way valve according to claim 2, characterized in that: It also includes a sealing member, which is clamped between the partition plate and the bottom plate and is used to strengthen the sealing between the opening edges of the plurality of sub-valve chambers and the bottom plate.

4. The multi-way valve according to claim 2, characterized in that: The valve cavity is provided with a central hub, and the partition extends from the central hub to the side wall of the valve cavity; the valve core is fixedly mounted on the rotating shaft, and one end of the rotating shaft is rotatably mounted on the central hub.

5. The multi-way valve according to claim 4, characterized in that: The multi-way valve includes a first shell and a second shell, which are buckled together along the axial direction of the rotating shaft; the valve cavity and the valve core are located in the space formed by the first shell and the second shell, and are limited by the first shell and the second shell to maintain sealing contact.

6. The multi-way valve according to claim 4, characterized in that: The central hub, the partition and the side wall are provided with grooves; the multi-way valve also includes a sealing member, which includes a central portion, an outer ring portion surrounding the central portion, and a rib portion extending outward from the central portion and connected to the outer ring portion; the central portion, the outer ring portion and the rib portion of the sealing member are respectively accommodated in the corresponding grooves of the central hub, the partition and the side wall; the valve core-proximal side of the sealing member is in sealing contact with the bottom plate.

7. The multi-way valve according to claim 1, characterized in that: The multi-way valve is a four-way valve, and the plurality of sub-valve chambers include a first sub-valve chamber, a third sub-valve chamber, a fourth sub-valve chamber and a second sub-valve chamber arranged in sequence along the circumferential direction of the rotation axis; the plurality of valve ports include a first valve port, a second valve port, a third valve port and a fourth valve port, and are respectively connected to the first sub-valve chamber, the second sub-valve chamber, the third sub-valve chamber and the fourth sub-valve chamber; the first sub-valve chamber, the second sub-valve chamber, the third sub-valve chamber and the fourth sub-valve chamber are arranged along the circumferential direction of the rotation axis, and each sub-valve chamber is fan-shaped or fan-shaped.

8. The multi-way valve according to claim 7, characterized in that: The central angle corresponding to the fourth sub-valve chamber is 1.4 to 1.6 times the central angle corresponding to the second sub-valve chamber, the central angle corresponding to the third sub-valve chamber is 3.4 to 3.6 times the central angle corresponding to the second sub-valve chamber, and the central angle corresponding to the first sub-valve chamber is 2.9 to 3.1 times the central angle corresponding to the second sub-valve chamber.

9. The multi-way valve according to claim 8, characterized in that: The central angle corresponding to the second sub-valve cavity is 35 degrees to 45 degrees.

10. The multi-way valve according to claim 9, characterized in that: The central angle corresponding to the second sub-valve chamber is 40 degrees, the central angle corresponding to the fourth sub-valve chamber is 1.5 times the central angle corresponding to the second sub-valve chamber, the central angle corresponding to the third sub-valve chamber is 3.5 times the central angle corresponding to the second sub-valve chamber, and the central angle corresponding to the first sub-valve chamber is 3 times the central angle corresponding to the second sub-valve chamber.

11. The multi-way valve according to claim 7, characterized in that: The two openings of the bottom plate are a first opening and a second opening. When the bottom plate is rotated to different positions, the first opening and the second opening enable the multi-way valve to have at least three of the following working modes: The first opening is connected to the first sub-valve chamber, and the second opening is connected to the third sub-valve chamber; The first opening is connected to the first sub-valve chamber, and the second opening is connected to the fourth sub-valve chamber and the third sub-valve chamber; The first opening is connected to the first sub-valve chamber, and the second opening is connected to the fourth sub-valve chamber; The first opening is connected to the third sub-valve chamber, and the second opening is connected to the second sub-valve chamber; The first opening is connected to the third sub-valve chamber, and the second opening is connected to the first sub-valve chamber; The first opening is in communication with the third sub-valve chamber and the fourth sub-valve chamber, and the second opening is in communication with the first sub-valve chamber.

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