CN115539674A

CN115539674A - Control valve

Info

Publication number: CN115539674A
Application number: CN202110733390.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30
Also published as: WO2023273866A1

Abstract

The application provides a fluid control valve, the control valve includes the valve block, the valve core assembly includes the first valve core and second valve core, the control valve has valve cavities, the valve block has ports, the first valve core and second valve core are located in valve cavity, the rotary valve core assembly can open or close the port corresponding to communicating chamber of the valve core assembly, the control valve also includes the first drive division and the second drive division, the first drive division is integrated into one piece or transmission connection with the first valve core, the second drive division is integrated into one piece or transmission connection with the second valve core, the valve core axle is connected with first valve core transmission, when the first valve core rotates, the first drive division contacts with the second drive division, and drive the second valve core to rotate, thus realize different circulation modes through two valve cores; the control valve has the advantages of simple assembly structure between the valve cores, small impact and capability of realizing different combinations and flow channel switching modes of the first valve core and the second valve core.

Description

Control valve

Technical Field

The invention relates to the technical field of fluid control, in particular to a control valve.

Background

With the increase of global energy consumption and environmental protection pressure, new energy automobiles undoubtedly become a new trend for the development of the future automobile field, and have great significance in protecting the global environment, slowing down resource consumption and improving the quality of life of human beings; the control valve is used as an important component of an air conditioning regulation system of new energy vehicle quantity, a heat management system of battery cooling and the like, and has the function of controlling the flow rate and the flow direction of a medium. How to design a control valve to meet the flow and direction requirements of a thermal management system is an urgent problem to be solved.

Disclosure of Invention

The invention aims to provide a control valve which can better control the flow rate and the flow direction of a medium.

The embodiment of the application provides a control valve, which comprises a valve body and a valve core assembly, wherein the control valve is provided with a valve cavity, at least part of the valve core assembly is positioned in the valve cavity, the valve body is provided with at least four ports, the control valve is provided with at least three interfaces, the interfaces are external interfaces of the control valve, the ports are correspondingly communicated with the interfaces, the ports are communicated with the valve cavity, the valve core assembly comprises a first valve core, a second valve core and a valve shaft, the first valve core and the second valve core are arranged along the axial direction of the control valve, at least part of the first valve core and at least part of the second valve core are both positioned in the valve cavity, and the valve core shaft is in transmission connection with the first valve core; the valve core assembly is provided with a communication cavity, the communication cavity comprises a first communication cavity and a second communication cavity, the first communication cavity is formed in the first valve core, and the second communication cavity is formed in the second valve core; the control valve further comprises a first transmission part and a second transmission part, the first transmission part is in transmission connection with the second transmission part, the first transmission part is integrally formed or in transmission connection with the first valve core so that the first transmission part can rotate synchronously with the first valve core, the second transmission part is integrally formed or in transmission connection with the second valve core so that the second transmission part can rotate synchronously with the second valve core, when the first valve core rotates, the first transmission part is in contact with the second transmission part and drives the second valve core to rotate, and the first valve core and the second valve core can be communicated with the port corresponding to the communication cavity through rotation.

In the control valve that this application provided, the control valve includes first transmission portion and second transmission portion, the case axle can drive first case rotatory, first transmission portion can rotate with first case is synchronous, second transmission portion can rotate with the second case is synchronous, when first case rotates, first transmission portion contacts with second transmission portion, and it is rotatory to drive the second case, thereby realize the combination intercommunication and the end of runner, assembly structure is comparatively simple between the case of this kind of control valve, it is little to strike, can realize that first case and second case satisfy different combinations and runner switching mode, can satisfy thermal management system's intercommunication and switching demand better.

Drawings

FIG. 1 is a perspective view of a first embodiment of a control valve provided herein;

FIG. 2 is an exploded view of the control valve of FIG. 1;

FIG. 3 is a perspective view from one perspective of the assembly of the valve body and valve core assembly of FIG. 2;

FIG. 4 is a front view of the assembly of FIG. 3;

FIG. 5 is a schematic cross-sectional view A-A of the assembly of FIG. 4;

FIG. 6 is a schematic cross-sectional structural view B-B of the assembly of FIG. 4;

FIG. 7 is a schematic cross-sectional structural view C-C of the assembly of FIG. 4;

FIG. 8 is a perspective view of a first perspective of the valve body;

FIG. 9 is a perspective view of a second perspective of the valve body;

FIG. 10 is a perspective view of the valve body from a third perspective;

FIG. 11 is a perspective view of the valve body from a fourth perspective;

FIG. 12 is a partial cross-sectional structural view of the valve body;

FIG. 13 is a perspective view of the valve core assembly with the upper and lower cover plates and the seal ring;

FIG. 14 is an exploded schematic view of the assembly of FIG. 13;

FIG. 15 is a front view of the assembly of FIG. 13;

FIG. 16 is a schematic cross-sectional view taken along line D-D of FIG. 15;

FIG. 17 is a perspective view of a first valve cartridge from one perspective;

FIG. 18 is a perspective view of one perspective of the second spool;

FIG. 19 is a cross-sectional view of the flow passage at the first valve spool when the valve spool assembly is in the first operating position;

FIG. 20 is a cross-sectional view of the flow passage at the second valve core when the valve core assembly is in the first operating position;

FIG. 21 is a schematic cross-sectional view of the flow path at the first valve spool when the valve spool assembly is in the second operating position;

FIG. 22 is a cross-sectional view of the flow passage at the second spool when the spool assembly is in the second operating position;

FIG. 23 is a schematic cross-sectional view of the flow path at the first valve spool when the valve spool assembly is in the third operating position;

FIG. 24 is a cross-sectional view of the flow passage at the second valve spool when the valve spool assembly is in the third operating position;

FIG. 25 is a cross-sectional view of the flow passage at the first valve spool when the valve spool assembly is in the fourth operating position;

fig. 26 is a cross-sectional view of the flow passage at the second valve core when the valve core assembly is in the fourth operating position.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The embodiment of the invention provides a control valve which can be used for a vehicle thermal management system, particularly can be used for a cooling liquid circulating system, and can achieve the flow path communication and switching functions of the thermal management system.

Referring to fig. 1 to 8, the control valve 1000 includes a valve body 100, a valve core assembly 200, and a driving portion 300, where the valve body 100 has a valve cavity 101 and a port 201, the valve body 100 includes a side wall portion, the side wall portion forms a peripheral wall of the valve cavity 101 or at least a portion of the peripheral wall, the port 201 is located on the side wall portion, and the port 201 is communicated with the valve cavity 101, the valve core assembly 200 includes a first valve core 11, a second valve core 12, and a valve shaft 13, the first valve core 11 and the second valve core 12 are arranged along an axial direction of the control valve 100, the first valve core 11 and the second valve core 12 are both located in the valve cavity 101, and the driving portion 300 is in transmission connection with the first valve core 11 through the valve shaft 13, so that the valve core shaft 9 can drive the first valve core 11 to rotate. Of course, the driving part 300 may be located in the thermal management system, not integrated with the control valve, but may be in transmission connection with the valve shaft 13; the first spool 11 and the second spool 12 may be formed as a single piece.

As shown in fig. 14 to 18, the control valve 100 further includes a first transmission portion 15 and a second transmission portion 14, the first transmission portion 15 is located on one side of the first valve core 11 close to the second valve core 12, the first transmission portion 15 is integrally formed with or in transmission connection with the first valve core 11, in this embodiment, the first transmission portion 15 is integrally formed with the first valve core 11, so that the first transmission portion 15 can rotate synchronously with the first valve core 11; the second transmission part 14 is integrally formed or in transmission connection with the second valve core 12, in this embodiment, the second transmission part 14 is integrally formed with the second valve core 12 so that the second transmission part 14 can rotate synchronously with the second valve core 12, and the second transmission part 14 is located on one side of the second valve core 12 close to the first valve core 11. With further reference to fig. 16 and 18, the first transmission part 15 has an external tooth portion 151, the second transmission part 14 has an internal tooth portion 141, and the first transmission part 15 and the second transmission part 14 are geared by the external tooth portion 151 and the internal tooth portion 141, so that the first valve spool 11 and the second valve spool 12 are geared; further, in fig. 16 and 18, the second valve core 12 further has a shaft support portion 142, the second transmission portion 14 is located at one end of the second valve core 12, the shaft support portion 142 is located at the other end of the second valve core 12 and protrudes from the end face, the shaft support portion 142 is located coaxially with the valve shaft 13, the shaft support portion 142 is supported by a housing of the control valve, the housing here includes a valve body and a cover plate, the cover plate includes a first cover plate and a second cover plate, in this embodiment, the shaft support portion 142 is supported by the second cover plate, and the detailed structure is described later. When the first valve core 11 rotates, the first transmission part 15 contacts with the second transmission part 14 and drives the second valve core 12 to rotate synchronously.

As shown in fig. 9 to 13, the valve chamber 101 includes a first valve chamber 102 and a second valve chamber 103, at least a part of the first valve chamber 102 and at least a part of the second valve chamber 103 are arranged in the axial direction of the control valve, the side wall portion of the valve body 100 includes a first side wall portion 104 and a second side wall portion 105, the first side wall portion 104 forms a peripheral wall or at least a part of the peripheral wall of the first valve chamber 102, the second side wall portion 105 forms a peripheral wall or at least a part of the peripheral wall of the second valve chamber 103, at least a part of the first valve spool 11 is located in the first valve chamber 102, and at least a part of the second valve spool 12 is located in the second valve chamber 103; the number of the ports 201 of the control valve may be five, which are respectively defined as a first port 21, a second port 22, a third port 23, a fourth port 24 and a fifth port 25, the first port 21 and the second port 22 may be located on the first sidewall 104 and are all communicated with the first valve chamber 102, and the third port 23, the fourth port 24 and the fifth port 25 may be located on the second sidewall 105 and are all communicated with the second valve chamber 103. Of course, the number of ports 201 is not limited to five, and the valve body 100 has at least four ports or six ports.

In this embodiment, further referring to fig. 8 to 13, the control valve 1000 may have four ports 90 defined as a first port 91, a second port 92, a third port 93 and a fourth port 94, where the ports are external ports of the control valve 1000, and the working medium may flow into or leave from the control valve through the ports, where the number of the ports is not limited to four, and the number of the ports is greater than or equal to three; the ports of the control valve are in communication with the ports, which in this embodiment includes one-to-one communication, many-to-one communication, and one-to-many communication.

In this embodiment, referring to fig. 6 to 12, the number of the ports 201 is greater than the number of the ports 90, the control valve has four ports, in this embodiment, the four ports are also formed in the valve body 100, the valve body 100 has five ports 201, in order to ensure the communication between the ports 90 and the ports 201, in this embodiment, the valve body 100 further has one bypass channel 70 and four flow channels 80, two of the ports 201 are communicated with the bypass channel 70, the bypass channel 70 is communicated with one of the ports 90 through one flow channel 80, and the other three ports 201 are respectively communicated with the other three ports 90 through the other three flow channels 80 in a one-to-one correspondence manner. Specifically, the number of the flow passages 80 is four, which is defined as a first flow passage 81, a second flow passage 82, a third flow passage 83 and a fourth flow passage 84, the number of the bypass passage 70 is one, one port of each flow passage is formed on the outer surface of the valve body to form one port of the control valve, and the other port of a part of the flow passages is formed on the inner wall of the valve body to form a port of the control valve, specifically, one port of the first flow passage 81 is a first port 91, the other port of the first flow passage 81 is a first port 21, and one port of the second flow passage 82 is a second port 92; the other port of the second flow passage 82 is communicated with the bypass passage 70, the other port of the second flow passage 82 is defined as a bypass connecting hole 71, the second flow passage 82 is communicated with the bypass passage 70 through the bypass connecting hole 71, and the second port 22 and the third port 23 are both communicated with the bypass passage 70, so that the second port 22, the third port 23 and the bypass connecting hole 71 are communicated through the bypass passage 70; one port of the third flow passage 83 is a third port 93, and the other port of the third flow passage 83 is a fourth port 24; one port of the fourth flow passage 84 is a fourth port 94, and the other port of the fourth flow passage 84 is a fifth port 25.

With further reference to fig. 1 to 5 and 6 to 7, the control valve 1000 further includes a first cover plate 61 and a second cover plate 62, the first cover plate 61 is connected to one end of the valve body 100, the second cover plate 62 is connected to the other end of the valve body 100, and the valve chamber 10 is located between the first cover plate 61, the valve body 100 and the second cover plate 62; the first cover plate 61 has a first support portion 611 and a second support portion 612, the second cover plate 62 has a third support portion 621 and a fourth support portion 622, the first support portion 611, the second support portion 612, the third support portion 621 and the fourth support portion 622 are all located in the valve chamber 101, the control valve 1000 includes a first seal ring 51, a second seal ring 52, a third seal ring 53 and a fourth seal ring 54, the first seal ring 51 is supported by the first support portion 611 and is disposed adjacent to the first port 21, the second seal ring 52 is supported by the second support portion 612 and is disposed adjacent to the second port 22, the third seal ring 53 is supported by the third support portion 621 and is disposed adjacent to the third port 23, the fourth seal ring 54 is supported by the fourth support portion 622 and is disposed adjacent to the fourth port 24, each seal ring has a passage that communicates with the adjacent corresponding port; in this embodiment, the fifth port 25 is a normally open port, and no seal ring is provided on the outer periphery of the fifth port 25. Of course, one of the first cover plate 61 and the second cover plate 62 may be formed integrally with the valve body, and the other may be separately and fixedly connected with the valve body.

As shown in fig. 5, the second cover plate 62 further has a mounting groove 623, an opening of the mounting groove 623 faces the valve cavity 101, the shaft support portion 142 extends into the mounting groove 623 and is supported on the second cover plate 62, the mounting groove 623 is a circular hole, and the mounting groove 623 and the valve shaft 13 are coaxially arranged; as shown in fig. 1 and 16, the first cover plate 61 has a through hole 610, the through hole 610 penetrates upper and lower end surfaces of the first cover plate 61, a portion of the valve shaft 13 extends out of the valve chamber 101 from the through hole 610, the extending portion of the valve shaft 13 is drivingly connected to the driving portion 300, and the valve shaft 13 located in the valve chamber is drivingly connected to the first valve body 11.

Referring to fig. 1 to 16, in the present embodiment, the driving portion 300 is located at one side of the first cover plate 61, the ports 201 are located at an inner sidewall of the valve body 100 and are arranged along a circumferential direction of the inner sidewall, the ports 90 are located at an outer sidewall of the valve body 100 and may be located at a same plane, and a side of the driving portion 300 and a side of the ports 90 are perpendicular and adjacent to each other, which is beneficial to reasonably use a space of the control valve, and meanwhile, locating the ports at a same plane is beneficial to forming a uniform sealing structure, which is beneficial to simplifying an assembly process.

As shown in fig. 15 to 20, the first spool 11 has a first communication chamber 111, and the second spool 12 has a second communication chamber 121; in the present embodiment, the first valve element 11 and the second valve element 12 are formed by injection molding, the first communicating cavity 111 is a concave groove formed by inward sinking from the outer surface of the first valve element 11, and the second communicating cavity 121 is a concave groove formed by inward sinking from the outer surface of the second valve element 12; of course, in other embodiments, the first communicating chamber 111 and the second communicating chamber 121 may be through holes. The first communicating cavity 111 and the second communicating cavity 121 are collectively called as communicating cavities of the valve core assembly, the first communicating cavity 111 and the second communicating cavity 121 are independent spaces, and the first communicating cavity 111 and the second communicating cavity 121 are not directly communicated, namely the first communicating cavity 111 and the second communicating cavity 121 are not communicated on the valve core assembly; the rotation of the first spool 11 and the second spool 12 can communicate with the ports 201 at the two ends of the communication cavity of the spool assembly; in this embodiment, the first communicating cavity 111 can communicate with the first port 21 and the second port 22, the second communicating cavity 121 can communicate with the fifth port 25 and the fourth port 24 or the fifth port 25 and the third port 23, that is, the second communicating cavity 121 can communicate the fifth port 25 with the fourth port 24, or the second communicating cavity 121 can communicate the fifth port 25 with the third port 23, in this embodiment, the fifth port 25 is a normally open port, and along the axial direction of the control valve, the orthographic projection of the cavity wall of the first communicating cavity 111 and the orthographic projection of the cavity wall of the second communicating cavity 121 are at least partially staggered.

As shown in fig. 17, 19, 21, 23, and 25, the main body of the first valve core 11 is a spherical structure, the first valve core 11 has a first sealing portion 112, a cross section of the first valve core 11 is made by passing a plane perpendicular to the valve shaft 13 through the center of the first valve core 11, a projection of the first valve core 11 on the cross section is circular, an arc length corresponding to the first communicating cavity 111 is greater than half of a perimeter of the first valve core 11 on the cross section of the first valve core 11, an arc length corresponding to the first sealing portion 112 is greater than a diameter of any one of the first sealing ring 51 and the second sealing ring 52, and an arc length corresponding to the first sealing portion 112 is less than half of the perimeter of the first valve core; this facilitates the communication between the first port 21 and the second port 22 through the first communicating chamber 111 without obstructing the first port 21 and the second port 22; meanwhile, the first port 21 and the second port 22 may be engaged and sealed by the first sealing portion 112 with the first sealing ring 51 and the second sealing ring 52.

As shown in fig. 18, 20, 22, 24, and 26, the second valve core 12 has a second sealing portion 122, a cross section of the second valve core 12 is taken through the center of the second valve core 12 by a plane perpendicular to the valve axis, a projection of the second valve core 12 to the cross section is circular, an arc length corresponding to the second communicating chamber 121 is smaller than an arc length between the third port 23 and the fourth port 24, and an arc length corresponding to the second sealing portion 122 is larger than a diameter of any one of the third sealing ring 53 and the fourth sealing ring 54 in the cross section of the second valve core 12; this facilitates the alternative communication of the fifth port 25 with the third port 23 and the fourth port 24 through the second communication chamber 121; meanwhile, the third port 23 or the fourth port 24 may be engaged and sealed by the second sealing portion 122 with the third sealing ring 53 and the fourth sealing ring 54.

In this embodiment, the control valve has four operation modes, but may have only one or more operation modes.

Referring to fig. 19 and 20 in combination, in the first operating mode, the spool assembly is in the first position, the first port 91 is communicated with the second port 92 through the first communication chamber 111 of the first spool 11, and the fourth port 94 is communicated with the second port 92 through the second communication chamber 121 of the second spool 12 and the bypass passage 70. Specifically, fig. 19 is a schematic cross-sectional structure view of the flow passage at the first valve core when the valve core assembly is in the first working position; FIG. 20 is a cross-sectional view of the flow passage at the second spool when the spool assembly is in the first operating position; referring to fig. 19, the first communication chamber 111 of the first valve spool 11 communicates with the first port 21 and the second port 22, and the first sealing portion 112 is located between the first port 21 and the second port 22 and does not block the first port 21 and the second port 22, in this embodiment, the first sealing portion 112 is located in the first valve chamber and is adjacent to one side of the valve body where the first port 91 is located, the first port 21 communicates with the first port 91 through the first flow passage 81, and the second port 22 communicates with the second port 92 through the bypass passage 70 and the second flow passage 82; referring to fig. 20, the second communication chamber 121 of the second valve element communicates with the third port 23 and the fifth port 25, the fourth port 94 communicates with the fifth port 25 through the fourth flow passage 84, the second sealing portion 122 is located between the third port 23 and the fifth port 25 and seals the fourth port 24, the third port 23 and the fifth port 25 are not blocked by the second sealing portion 122, the second port 23 communicates with the second port 92 through the bypass passage 70 and the second flow passage 82, and the fourth port 24 is blocked by the second sealing portion 122 at this time, so that the third port 93 is in a closed state. The first position is set to be an initial position, and the angle at which the valve core assembly is located is defined to be 0 °.

Referring to fig. 21 and 22 in combination, in the second operating mode, the valve core assembly is in the second position, the first sealing portion 112 of the first valve core 11 seals the first port 21, and the first port 91 is blocked; the fourth port 94 communicates with the second port 92 through the second communication chamber 121 of the second spool 12; specifically, referring to fig. 21, the first sealing portion 112 of the first valve element 11 seals the first port 21, the first port 21 is not communicated with the second port 22, and the first port 91 is not communicated; referring to fig. 22, the second communication chamber 121 of the second valve body 12 communicates the third port 23 and the fifth port 25, the third port 23 communicates with the second port 92 through the bypass passage 70 and the second flow passage 82, the second seal portion 122 of the second valve body 12 seals the fourth port 24, and the third port 93 does not communicate; by controlling the valve core assembly to rotate clockwise from 0-degree to 45-degree, the control valve is switched from the first operation mode to the second operation mode, and the valve core assembly operates from the first position to the second position.

Referring to fig. 23 and 24 in combination, in the third operating mode, the valve core assembly is in the third position, the first sealing portion 112 of the first valve core 11 seals the first port 21, and the first port 91 is blocked; the third port is communicated with the fourth port through a communicating cavity of the second valve core; specifically, referring to fig. 23, the first seal portion 112 of the first spool 11 seals the first port 21, the first port 21 is not communicated with the second port 22, and the first port 91 is not communicated; referring to fig. 24, the second communication chamber 121 of the second spool communicates the fifth port 25 and the fourth port 24, the fourth port 24 communicates with the third port 93 through the third flow passage 83, and the fifth port 25 communicates with the fourth port 94 through the fourth flow passage 84; by controlling the valve core assembly to rotate clockwise from 45-degree to 90-degree, the control valve is switched from the second operation mode to the third operation mode.

Referring to fig. 25 and 26 in combination, in the fourth operating mode, the spool assembly is in the fourth position, the first port 91 and the second port 92 communicate through the first communication chamber 111 of the first spool, the third port 93 and the fourth port 94 communicate through the second communication chamber 121 of the second spool, and the third port 23 is sealed by the second sealing portion 122 of the second spool. Specifically, referring to fig. 25, the first communication chamber 111 of the first spool communicates with the first port 21 and the second port 22, the first port 21 communicates with the first port 91 through the first flow passage 81, and the second port 22 communicates with the second port 92 through the second flow passage 82; referring to fig. 26, the second communication cavity 121 of the second valve spool communicates with the fourth port 24 and the fifth port 25, the fourth port 24 communicates with the third port 93 through the third flow passage 83, the fifth port 25 communicates with the fourth port 94 through the fourth flow passage 84, and the control valve is rotated clockwise from 90 ° to 135 ° through the control valve spool assembly, so that the control valve is switched from the third operation mode to the fourth operation mode.

Based on this, on the cross section of the first valve core, a line segment defining the center of the first valve core and one of the fixed points on the contour of the first valve core is a first reference line, on the cross section of the second valve core, a line segment defining the center of the second valve core and one of the fixed points on the contour of the second valve core is a second reference line, it can be understood that the fixed points are fixed points on the contour of the valve core, when the valve core rotates to any position, a corresponding reference line is formed by connecting the fixed points and the centers, an included angle between the first reference lines of the first reference line second position of the first position is 45 °, an included angle between the second reference lines of the second reference line second position of the first position is 45 °, an included angle between the first reference lines of the first reference line third position of the second position is 45 °, an included angle between the second reference lines of the second reference line third position of the second position is 45 °, and an included angle between the second reference lines of the second reference line fourth position of the first reference line of the third position is 45 °.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. A control valve comprises a valve body and a valve core assembly, wherein the control valve is provided with a valve cavity, at least part of the valve core assembly is positioned in the valve cavity, the valve body is provided with at least four ports, the control valve is provided with at least three interfaces, the interfaces are external interfaces of the control valve, the ports are correspondingly communicated with the interfaces, and the ports are communicated with the valve cavity; the valve core assembly is provided with a communication cavity, the communication cavity comprises a first communication cavity and a second communication cavity, the first communication cavity is formed in the first valve core, and the second communication cavity is formed in the second valve core;

the control valve further comprises a first transmission part and a second transmission part, the first transmission part is in transmission connection with the second transmission part, the first transmission part is integrally formed or in transmission connection with the first valve core so that the first transmission part can rotate synchronously with the first valve core, the second transmission part is integrally formed or in transmission connection with the second valve core so that the second transmission part can rotate synchronously with the second valve core, when the first valve core rotates, the first transmission part is in contact with the second transmission part and drives the second valve core to rotate, and the first valve core and the second valve core can be communicated with the ports corresponding to the communication cavities in a rotating mode.

2. The control valve of claim 1, wherein the first transmission portion is integrally formed with the first spool, the second transmission portion is integrally formed with the second spool, the first transmission portion is located on a side of the first spool adjacent to the second spool, and the second transmission portion is located on a side of the second spool adjacent to the first spool; the first transmission part is provided with an external tooth part, the second transmission part is provided with an internal tooth part, and the first transmission part and the second transmission part are in gear transmission.

3. The control valve of claim 2, wherein the number of ports is greater than the number of ports, the control valve has four ports, the valve body has five ports, the valve body also has one bypass passage and four flow passages,

two ports are communicated with the bypass channel, the bypass channel is communicated with one of the interfaces through one of the runners, and the other three ports are respectively communicated with the other three interfaces in a one-to-one correspondence mode through the other three runners.

4. The control valve of claim 3 wherein the five ports are defined as a first port, a second port, a third port, a fourth port, and a fifth port, the four ports are defined as a first port, a second port, a third port, and a fourth port, the flow passages are defined as a first flow passage, a second flow passage, a third flow passage, and a fourth flow passage,

the first port is communicated with the first interface through the first runner, the second port and the third port are communicated with the bypass channel, the second interface is communicated with the bypass channel through the second runner, the fourth port is communicated with the third interface through the third runner, and the fifth port is communicated with the fourth interface through the fourth runner.

5. The control valve of claim 4, further comprising a first cover plate and a second cover plate, the first cover plate and the second cover plate being arranged along an axial direction of the control valve, the first cover plate being connected to one end of the valve body, the second cover plate being connected to the other end of the valve body, the valve chamber being located between the first cover plate, the valve body and the second cover plate, the first cover plate having a first support portion and a second support portion, the second cover plate having a third support portion and a fourth support portion, the first support portion, the second support portion, the third support portion and the fourth support portion being located in the valve chamber;

the control valve still includes first sealing washer, second sealing washer, third sealing washer and fourth sealing washer, first sealing washer passes through first supporting part supports and is close to first port sets up, the second sealing washer passes through second supporting part supports and is close to the second port sets up, the third sealing washer passes through the third supporting part supports and is close to the third port sets up, the fourth sealing washer passes through the fourth supporting part supports and is close to the fourth port sets up.

6. The control valve of claim 5, wherein the first valve spool has a first sealing portion, a cross section of the first valve spool is formed through a center of the first valve spool in a plane perpendicular to a valve shaft, the cross section of the first valve spool is circular, an arc length corresponding to the first communicating chamber is greater than more than half of a circumference of the cross section of the first valve spool in the cross section of the first valve spool, an arc length corresponding to the first sealing portion is greater than a diameter of any one of the first sealing ring and the second sealing ring, and an arc length corresponding to the first sealing portion is less than half of the circumference of the cross section of the first valve spool;

the second valve core is provided with a second sealing part, the cross section of the second valve core is formed by passing through the center of the second valve core by a plane perpendicular to the valve shaft, the cross section of the second valve core is circular, the arc length corresponding to the second communicating cavity is smaller than the arc length between the third port and the fourth port on the cross section of the second valve core, and the arc length corresponding to the second sealing part is larger than the diameter of any one of the third sealing ring and the fourth sealing ring.

7. The control valve of claim 6, further comprising a drive portion in driving connection with the valve shaft, the drive portion being located on one side of the valve body, the port being located circumferentially on an inner sidewall of the valve body, and the port being located on an outer sidewall of the valve body and in a same plane.

8. The control valve of claim 7, wherein the control valve has at least one of the following modes of operation:

in a first working mode, the valve core assembly is in a first position, the first communicating cavity of the first valve core is communicated with a first port and a second port, the second communicating cavity of the second valve core is communicated with a third port and a fifth port, the first port is communicated with the first interface through the first flow passage, the second port and the third port are communicated with the second interface through the bypass passage and the second flow passage, the fourth interface is communicated with the fifth port through the fourth flow passage, and the second sealing part seals the fourth port so as to close the fourth port and the third interface;

in a second operating mode, the valve core assembly is in a second position, the second communicating cavity of the second valve core communicates with the third port and the fifth port, the third port communicates with the second port through the bypass channel and the second flow passage, the fourth port communicates with the fifth port through the fourth flow passage, the first sealing portion seals the first port to close the first port and the first port, and the second sealing portion seals the fourth port to close the fourth port and the third port;

in a third operating mode, the valve core assembly is in a third position, the second communicating chamber of the second valve core communicates with the fifth port and the fourth port, the fourth port communicates with the third port through the third flow passage, the fourth port communicates with the fifth port through the fourth flow passage, the first sealing portion seals the first port to close the first port and the first port, the second sealing portion seals the third port, and the second port is closed;

in a fourth working mode, the valve core assembly is in a fourth position, the first communication cavity of the first valve core communicates with the first port and the second port, the second communication cavity of the second valve core communicates with the fourth port and the fifth port, the first port communicates with the first interface through the first flow channel, the second port communicates with the second interface through the second flow channel, the fourth port communicates with the third interface through the third flow channel, and the fifth port communicates with the fourth interface through the fourth flow channel.

9. The control valve of claim 8, wherein: a line segment that defines the center of the first spool and one of the fixed points on the contour of the first spool on the cross section of the first spool is a first reference line, and a line segment that defines the center of the second spool and one of the fixed points on the contour of the second spool on the cross section of the second spool is a second reference line,

the included angle between the first reference line of the first position and the first reference line of the second position is 45 degrees, the second reference line of the first position with the included angle between the second reference line of the second position is 45 degrees, the first reference line of the second position with the included angle between the first reference line of the third position is 45 degrees, the second reference line of the second position with the included angle between the second reference line of the third position is 45 degrees, the first reference line of the third position with the included angle between the first reference line of the fourth position is 45 degrees, the second reference line of the third position with the included angle between the second reference line of the fourth position is 45 degrees.

10. The control valve of claim 9, wherein: the drive portion is in driving connection with the valve shaft, the first position is an initial position, the angle of rotation of the valve core assembly is 0 ° in the initial position, the control valve is switched from the first operation mode to the second operation mode by controlling the valve core assembly to rotate clockwise from 0 ° to 45 °, the control valve is switched from the second operation mode to the third operation mode by controlling the valve core assembly to rotate clockwise from 45 ° to 90 °, and the control valve is switched from the third operation mode to the fourth operation mode by controlling the valve core assembly to rotate clockwise from 90 ° to 135 °.