Multi-layer valve, thermal management system and vehicle

Abstract

The utility model provides a multi-layer valve, a thermal management system and a vehicle. The multi-layer valve comprises a valve body, a first valve element, a second valve element and a transmission structure. A containing cavity is formed in the valve body, and the first valve element and the second valve element are sequentially arranged in the containing cavity in the axial direction. The transmission structure is arranged between the first valve element and the second valve element, and the first valve element drives the transmission structure to coaxially rotate. The first valve element is provided with a plurality of rotating intervals, and the transmission structure is matched with the second valve element in part of the rotating intervals and drives the second valve element to rotate. And the transmission structure is separated from the second valve element in a part of the rotating interval, and the second valve element is kept still. The transmission structure is matched with or separated from the second valve element to form a plurality of rotating intervals, so that when the first valve element rotates, the second valve element coaxially rotates with the first valve element in different rotating intervals or keeps still, and the working condition requirements of different rotating angles of the first valve element and the second valve element are met.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to multi-layer valves, thermal management systems and vehicles. Background Art

[0002] As people's living standards continue to improve, vehicle technology continues to develop and be applied. Thermal management systems are crucial in vehicles, directly impacting their performance, safety, and comfort. Multi-layer valves are key components in vehicle thermal management systems, providing flow control, temperature regulation, operating mode switching, and other functions. Existing multi-layer valves feature synchronous rotation of multiple valve cores, making it impossible to adjust the operating conditions of multiple valve cores at different rotation angles. Alternatively, some multi-layer valves utilize gear transmission to achieve operating conditions with different rotation angles between multiple valve cores, but these multiple valve cores are not located on the same axis, posing a high risk of failure.

[0003] Therefore, it is necessary to provide an improved multi-layer valve, thermal management system and vehicle to solve the above problems. Utility Model Content

[0004] The present application provides a multi-layer valve, a thermal management system, and a vehicle that can rotate coaxially and achieve different rotation angles.

[0005] The present application provides a multi-layer valve, comprising: a valve body, a first valve core, a second valve core and a transmission structure, wherein an accommodating cavity is formed in the valve body, the first valve core and the second valve core are axially arranged in sequence in the accommodating cavity, the transmission structure is arranged between the first valve core and the second valve core, and the first valve core drives the transmission structure to rotate coaxially; the first valve core has multiple rotation intervals, and in some rotation intervals the transmission structure cooperates with the second valve core and drives the second valve core to rotate, and in some rotation intervals the transmission structure is separated from the second valve core, and the second valve core remains stationary.

[0006] Furthermore, the transmission structure includes a transmission shaft and a shift block, the transmission shaft is fixed to the first valve core and the shift block, and the shift block is protrudingly arranged on the outside of the transmission shaft; a transmission block is provided on the upper part of the second valve core, and the shift block and the transmission block are circumferentially matched to drive the second valve core to rotate.

[0007] Furthermore, the shift block includes a main body and an extension portion radially protruding from the main body, the main body is sleeved outside the transmission shaft, and the extension portion abuts against the transmission block.

[0008] Furthermore, the extension portion is fan-shaped and has a first driving surface and a second driving surface on both sides respectively; the transmission block is fan-shaped and has a first mating surface and a second mating surface on both sides respectively; when the first valve core rotates clockwise, the first driving surface can contact the first mating surface, and when the first valve core rotates counterclockwise, the second driving surface can contact the second mating surface.

[0009] Furthermore, the first valve core has three rotation intervals, namely a mode switching interval and two invalid intervals, and the two invalid intervals are respectively located on both sides of the mode switching interval; the second valve core correspondingly has three working states: a stationary state and two mode switching states; when the first valve core is located in the mode switching interval, the second valve core is in the stationary state; when the first valve core is located in the two invalid intervals, the second valve core is in the two mode switching states.

[0010] Furthermore, it also includes a limiting mechanism, which is arranged between the second valve core and the valve body. The limiting mechanism includes a first limiting portion arranged on the second valve core and a second limiting portion arranged on the valve body to limit the rotation range of the second valve core.

[0011] Furthermore, the first limiting portion is arranged on the upper part of the second valve core and is located radially outside the shift block, and the height of the first limiting portion exceeds the shift block; a matching area facing the top of the second valve core is provided in the valve body, and the second limiting portion is arranged in the matching area.

[0012] Furthermore, the first limiting portion includes two limiting protrusions, and a first abutting surface and a second abutting surface are respectively formed on one side of the two limiting protrusions, and the first abutting surface, the second abutting surface and the axis of the second valve core are all arranged in the same plane; the matching area is circular, the second limiting portion is a fan ring, and the first limiting surface and the second limiting surface are respectively provided on both sides of the second limiting portion, and the first abutting surface and the second abutting surface are respectively used to abut against the first limiting surface and the second limiting surface.

[0013] Furthermore, the valve body includes an upper valve body portion, a lower valve body portion and a partition portion, the upper valve body portion and the partition portion form a first sub-cavity for accommodating the first valve core, the lower valve body portion and the partition portion form a second sub-cavity for accommodating the second valve core, and a sealing partition is provided between the first sub-cavity and the second sub-cavity.

[0014] Furthermore, the upper valve body and the first valve core together form a first valve, and the lower valve body and the second valve core together form a second valve; the first valve is a proportional valve, and the second valve is a reversing valve.

[0015] Furthermore, the first valve is a ball valve or a column valve; and the second valve is a butterfly valve.

[0016] Furthermore, it also includes an actuator and a drive shaft, wherein the actuator is arranged on the valve body and is transmission-connected to the first valve core through the drive shaft.

[0017] The present application also provides a thermal management system, comprising the above-mentioned multi-layer valve.

[0018] The present application also provides a vehicle, including the above-mentioned vehicle.

[0019] The multi-layer valve of the present application cooperates or separates with the second valve core through a transmission structure to form multiple rotation intervals, so that when the first valve core rotates, the second valve core rotates coaxially with the first valve core or remains stationary within different rotation intervals. The first valve core and the second valve core not only rotate coaxially but also can achieve different rotation angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a multi-layer valve according to an exemplary embodiment of the present application.

[0021] Figure 2 yes Figure 1 A cross-sectional view of a multi-layer valve is shown.

[0022] Figure 3 yes Figure 1 An exploded view of a multi-layer valve is shown without the valve body and actuator.

[0023] Figure 4 yes Figure 1 A cross-sectional view of another embodiment of a multi-layer valve is shown.

[0024] Figure 5 yes Figure 4 An exploded view of a multi-layer valve is shown without the valve body and actuator.

[0025] Figure 6 yes Figure 1 Schematic diagram of the valve body of the multi-layer valve shown.

[0026] Figure 7 yes Figure 1 A cross-sectional view of a partition portion of a multi-layer valve is shown.

[0027] Figure 8 yes Figure 1 Another cross-sectional view of the partition portion of the multi-layer valve is shown.

[0028] Figure 9 It is a schematic diagram of the angular ranges corresponding to the three rotation intervals of the first valve core.

[0029] Figure 10This is a schematic diagram of the switching of the working states of the first valve and the second valve when the first valve core rotates within the mode switching range.

[0030] Figure 11 It is a schematic diagram of the switching of the working states of the first valve and the second valve when the first valve core rotates in one of the invalid intervals.

[0031] Figure 12 It is a schematic diagram of the switching of the working states of the first valve and the second valve when the first valve core rotates in another invalid range.

[0032] Description of Figure Numbers:

[0033] 10. Valve body; 11. Accommodating chamber; 111. First sub-chamber; 112. Second sub-chamber; 12. Matching area; 13. Upper valve body; 14. Lower valve body; 15. Partition; 20. First valve core; 21. Input end; 211. Transmission groove; 212. Raised portion; 22. Output end; 30. Second valve core; 301. Moving valve chip; 302. Static valve chip; 303. Flow hole; 304. Connecting hole; 305. Long groove; 306. Sealing gasket; 31. Transmission block; 311. First matching surface; 312. Second matching surface; 32. Mounting hole; 40. Transmission structure; 41. Transmission shaft; 411. Groove; 42. Shift block; 421. Main body; 422, extension portion; 4221, first driving surface; 4222, second driving surface; 43, fixing hole; 431, protrusion; 50, limiting mechanism; 51, second limiting portion; 511, first limiting surface; 512, second limiting surface; 52, first limiting portion; 521, limiting protrusion; 5211, first abutting surface; 5212, second abutting surface; 60, actuator; 70, drive shaft; 80, first valve; 81, first connecting pipe; 82, second connecting pipe; 83, three connecting pipes; 90, second valve; 91, first connecting channel; 92, second connecting channel; 93, third connecting channel; 94, fourth connecting channel. DETAILED DESCRIPTION

[0034] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0035] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0036] See also Figures 1 to 2 As shown, the multi-layer valve includes a valve body 10, a first valve core 20, a second valve core 30, a transmission structure 40, a limiting mechanism 50, an actuator 60, and a drive shaft 70. The first valve core 20 and the second valve core 30 are disposed within the valve body 10. The transmission structure 40 is disposed between the first valve core 20 and the second valve core 30. The first valve core 20 drives the transmission structure 40 for coaxial rotation. The limiting mechanism 50 is disposed between the second valve core 30 and the valve body 10. The actuator 60 is disposed on the valve body 10 and is in transmission connection with the first valve core 20 via the drive shaft 70.

[0037] The first valve core 20 has multiple rotation ranges. In some rotation ranges, the transmission structure 40 cooperates with the second valve core 30 and drives the second valve core 30 to rotate. In some rotation ranges, the transmission structure 40 is separated from the second valve core 30, and the second valve core 30 remains stationary.

[0038] Please also see Figures 3 to 8 As shown, the valve body 10 is formed with a receiving cavity 11 and a mating area 12. The mating area 12 is located in the middle of the receiving cavity 11. The first valve core 20 and the second valve core 30 are sequentially arranged in the axial direction within the receiving cavity 11. The mating area 12 is circular and faces the top of the second valve core 30.

[0039] The valve body 10 includes an upper valve body portion 13, a lower valve body portion 14, and a partition portion 15. The partition portion 15 is disposed between the upper and lower valve bodies 13, 14. The upper valve body portion 13 and the partition portion 15 form a first sub-cavity 111 that accommodates the first valve core 20. The lower valve body portion 14 and the partition portion 15 form a second sub-cavity 112 that accommodates the second valve core 30. A sealing partition is provided between the first and second sub-cavities 111, 112 to enhance the airtightness of the first and second sub-cavities 111, 112. This provides physical isolation between the first and second sub-cavities 111, 112, and reduces heat transfer between the different valve cores in the multi-layer valve.

[0040] The first valve core 20 has an input end 21 and an output end 22. The input end 21 and the output end 22 are arranged opposite each other along the axial direction of the first valve core 20. The input end 21 is transmission-connected to the drive shaft 70. The output end 22 is transmission-connected to the transmission structure 40. A transmission groove 211 is provided on the input end 21, and a protrusion 212 is provided within the transmission groove 211. One end of the drive shaft 70 protrudes into the transmission groove 211, and a groove is provided on the end of the drive shaft 70 to cooperate with the protrusion 212; thereby, the drive shaft 70 drives the first valve core 20 to rotate coaxially.

[0041] According to an embodiment of the present application, the transmission groove 211 may also be in the shape of a spline sleeve, and one end of the drive shaft 70 may be in the shape of a spline.

[0042] A transmission block 31 is provided above the second valve core 30, and a mounting hole 32 is defined on the top wall of the second valve core 30. The transmission block 31 is radially disposed outside the mounting hole 32. The transmission block 31 has a first mating surface 311 and a second mating surface 312 on either side of the circumference of the second valve core 30. The transmission block 31 is sector-shaped. The vertex angle of the sector corresponding to the transmission block 31 is 90 degrees. The mounting hole 32 is circular.

[0043] The transmission structure 40 includes a transmission shaft 41 and a shift block 42. The shift block 42 is protrudingly arranged on the outside of the transmission shaft 41, and partially protrudes outward in the circumferential direction relative to the transmission shaft 41. A fixing hole 43 is provided on the shift block 42, and one end of the transmission shaft 41 protrudes into the fixing hole 43. The transmission shaft 41 is fixed to the shift block 42 to drive the shift block 42 to rotate coaxially. The shift block 42 cooperates with the transmission block 31 circumferentially to drive the second valve core 30 to rotate coaxially. The other end of the transmission shaft 41 protrudes into the output end 22 to be fixed to the first valve core 20. The first valve core 20 drives the transmission shaft 41 and the shift block 42 to rotate coaxially.

[0044] According to an embodiment of the present application, the transmission shaft 41 and the shift block 42 may also be formed integrally.

[0045] The shift block 42 includes a main body 421 and an extension portion 422 radially extending from the main body 421. The main body 421 is sleeved on the outside of the transmission shaft 41. The lower end of the extension portion 422 protrudes into the mounting hole 32. There is a gap between the lower end of the extension portion 422 and the inner wall surrounding the mounting hole 32. The extension portion 422 abuts against the transmission block 31. The extension portion 422 rotates circumferentially to push the transmission block 31 to rotate circumferentially, thereby driving the second valve core 30 to rotate. The fixing hole 43 is provided in the middle of the main body 421, and a protrusion 431 is provided in the fixing hole 43. A groove 411 is provided on the transmission shaft 41, and the protrusion 431 cooperates with the groove 411.

[0046] According to the embodiment of the present application, both ends of the transmission shaft 41 may also be spline-shaped, and the fixing hole 43 may be spline-sleeved, so as to achieve efficient torque transmission and reduce sliding friction.

[0047] The extension portion 422 is fan-shaped, and the vertex angle of the corresponding fan-shape is 90 degrees. The extension portion 422 has a first drive surface 4221 and a second drive surface 4222 on both sides. When the first valve core 20 rotates clockwise, the first drive surface 4221 can contact the first mating surface 311. The first drive surface 4221 pushes the first mating surface 311 circumferentially to push the second valve core 30 to rotate clockwise. When the first valve core 20 rotates counterclockwise, the second drive surface 4222 can contact the second mating surface 312. The second drive surface 4222 pushes the second mating surface 312 circumferentially to push the second valve core 30 to rotate counterclockwise.

[0048] According to other embodiments of the present application, the extension portion may be in other shapes, or may be configured as a structure of two protrusions, which can be in circumferential contact with the second valve core 30 and thereby drive the second valve core 30 to rotate.

[0049] The limiting mechanism 50 includes a first limiting portion 52 and a second limiting portion 51. The first limiting portion 52 and the second limiting portion 51 circumferentially cooperate to limit the rotational range of the second valve core 30. The first limiting portion 52 is disposed above the second valve core 30. The first limiting portion 52 is radially outward of the shift block 42. The height of the first limiting portion 52 exceeds that of the shift block 42. The second limiting portion 51 is disposed within the mating region 12 of the valve body 10.

[0050] The first limiting portion 52 includes two limiting protrusions 521. The two limiting protrusions 521 are arranged along the circumference of the top wall of the second valve core 30. A first abutting surface 5211 and a second abutting surface 5212 are formed on one side of the two limiting protrusions 521, respectively. The first abutting surface 5211, the second abutting surface 5212 and the axis of the second valve core 30 are all arranged in the same plane. The second limiting portion 51 is a fan ring, and the vertex angle corresponding to the fan ring is 90 degrees. A first limiting surface 511 and a second limiting surface 512 are provided on both sides of the second limiting portion 51, respectively. The first abutting surface 5211 and the second abutting surface 5212 are used to abut against the first limiting surface 511 and the second limiting surface 512, respectively, to limit the rotation angle range of the second valve core 30 to 90 degrees.

[0051] According to other embodiments of the present application, the specific structures of the first limiting portion and the second limiting portion may also be various, and the angles limited by the two limiting portions may also be changed accordingly to meet different needs.

[0052] See also Figure 9As shown, the first valve core 20 has three rotation intervals, namely a mode switching interval and two invalid intervals, and the two invalid intervals are located on both sides of the mode switching interval. In the illustrated embodiment, the mode switching interval of the first valve core 20 is 0 degrees to 90 degrees. One of the invalid intervals of the first valve core 20 is 0 degrees to -90 degrees. The other invalid interval of the first valve core 20 is 90 degrees to 180 degrees. The mode switching interval refers to when the first valve core 20 rotates between 0 degrees and 90 degrees, it can stop at any time to form the working state of the first valve core 20. The invalid interval refers to when the first valve core 20 rotates between 0 degrees to -90 degrees and 90 degrees to 180 degrees, the first valve core 20 only rotates in angle without stopping in the interval, and the first valve core 20 is in a non-working state.

[0053] The second valve core 30 has three corresponding working states: a stationary state and two mode switching states. When the first valve core 20 is in the mode switching range, the second valve core 30 is in the stationary state. When the first valve core 20 is in the two inactive ranges, the second valve core 30 is in the two mode switching states.

[0054] See also Figures 10 to 12 As shown, the upper valve body 13 and the first valve core 20 together form a first valve 80. The first valve 80 is a proportional valve. In addition, the first valve can also be a reversing valve. Specifically, the first valve 80 can be a ball valve, a column valve, or a butterfly valve. The lower valve body 14 and the second valve core 30 together form a second valve 90. The second valve 90 is a reversing valve. In addition, the second valve can also be a proportional valve. According to an embodiment of the present application, the first valve and the second valve can also be the same, both being proportional valves or both being reversing valves. Specifically, the second valve 90 is a ball valve, a column valve, a disk valve, or a butterfly valve.

[0055] In the embodiment of the present application, both the first valve 80 and the second valve 90 are ball valves, the first valve 80 is a proportional valve, and the second valve 90 is a reversing valve. The upper valve body 13 is provided with a first communication conduit 81, a second communication conduit 82, and a third communication conduit 83. The lower valve body 14 is provided with a first communication channel 91, a second communication channel 92, a third communication channel 93, and a fourth communication channel 94. The first communication channel 91, the second communication channel 92, the third communication channel 93, and the fourth communication channel 94 circumferentially surround the second valve core 30. The second valve core 30 rotates within the lower valve body 14 to connect two adjacent communication channels.

[0056] The shift block 42 rotates 90 degrees clockwise from 0 degrees, that is, the multi-layer valve is Figure 8 The left working state is switched to the right working state. The rotation angle of the first valve core 20 is 0 degrees to 90 degrees. The first valve core 20 is in the mode switching range, and the second valve core 30 is in a stationary state.

[0057] When the angle between the shift block 42 and the first valve core 20 is 0 degrees, Figure 8The left side of the multi-layer valve is shown in working state. The first communication channel 81 of the first valve core 20 is connected to the second communication channel 82. The second communication channel 92 of the second valve core 30 is connected to the third communication channel 93, and the first communication channel 91 is connected to the fourth communication channel 94.

[0058] When the angle between the shift block 42 and the first valve core 20 is 90 degrees, Figure 8 The second communication channel 82 of the first valve core 20 is in communication with the third communication channel 83 . The second communication channel 92 of the second valve core 30 is in communication with the third communication channel 93 , and the first communication channel 91 is in communication with the fourth communication channel 94 .

[0059] The shift block 42 rotates 90 degrees counterclockwise from 90 degrees, that is, the multi-layer valve is Figure 8 The right working state switches to Figure 9 The first valve core 20 is in the left working state. The rotation angle of the first valve core 20 is 90 degrees to 0 degrees. The first valve core 20 is in the mode switching range, and the second valve core 30 is in the stationary state.

[0060] The shift block 42 rotates 90 degrees counterclockwise from 0 degrees, that is, the multi-layer valve is Figure 9 The left working state switches to Figure 9 When the rotation range of the first valve core 20 is 0 degrees to -90 degrees, the first valve core 20 is in an invalid range and the second valve core 30 is in a mode switching state.

[0061] When the angle between the shift block 42 and the first valve core 20 is -90 degrees, Figure 9 The right side of the multi-layer valve is shown in its operating state. The first valve core 20 is in communication only with the first communication conduit 81 and is in a non-operating state. The first communication channel 91 of the second valve core 30 is in communication with the second communication channel 92, and the third communication channel 93 is in communication with the fourth communication channel 94.

[0062] The shift block 42 rotates 90 degrees clockwise from -90 degrees, that is, the multi-layer valve is Figure 9 The right working state switches to Figure 10 The first valve core 20 is in the left working state. The rotation range of the first valve core 20 is -90 degrees to 0 degrees. The first valve core 20 is in the invalid range and the second valve core 30 is in the stationary state.

[0063] When the angle between the shift block 42 and the first valve core 20 is 0 degrees, Figure 10 The left side of the multi-layer valve is shown in working state. The first communication channel 81 of the first valve core 20 is connected to the second communication channel 82. The first communication channel 91 of the second valve core 30 is connected to the second communication channel 92, and the third communication channel 93 is connected to the fourth communication channel 94.

[0064] The shift block 42 rotates 90 degrees clockwise from 0 degrees, that is, the multi-layer valve is Figure 10 The left working state switches to Figure 10 When the rotation range of the first valve core 20 is 0 degrees to 90 degrees, the first valve core 20 is in the mode switching interval and the second valve core 30 is in a stationary state.

[0065] When the angle between the shift block 42 and the first valve core 20 is 90 degrees, Figure 10 The second communication channel 82 of the first valve core 20 is in communication with the third communication channel 83. The first communication channel 91 of the second valve core 30 is in communication with the second communication channel 92, and the third communication channel 93 is in communication with the fourth communication channel 94.

[0066] The shift block 42 rotates 90 degrees clockwise from 90 degrees, that is, the multi-layer valve is Figure 10 The intermediate working state switches to Figure 10 When the rotation range of the first valve core 20 is 90 degrees to 180 degrees, the first valve core 20 is in the invalid range and the second valve core 30 is in the mode switching state.

[0067] When the angle between the shift block 42 and the first valve core 20 is 180 degrees, Figure 10 The right side of the multi-layer valve is shown in its operating state. The first valve core 20 is in communication only with the third communication conduit 83, meaning it is in a non-operating state. The second communication channel 92 of the second valve core 30 is in communication with the third communication channel 93, while the first communication channel 91 is in communication with the fourth communication channel 94.

[0068] In another embodiment of the present application, that is, when the first valve 80 is a ball valve and the second valve 90 is a ceramic disc valve. Figure 4 and Figure 5 As shown, the second valve core 30 comprises a movable valve core 301 and a stationary valve core 302. The movable valve core 301 is provided with a flow hole 303. The stationary valve core 302 is provided with two communication holes 304. When the movable valve core 301 and the stationary valve core 302 are in contact, the transmission structure 40 rotates, causing the movable valve core 301 to rotate, allowing coolant to flow through the flow hole 303 and into the communication holes 304. When the two communication holes 304 are aligned with the flow hole 303, the second valve 90 functions as a reversing valve. Flow regulation is achieved by varying the overlapping area of ​​the flow holes 303 and the communication holes 304.

[0069] The movable valve core 301 is provided with an arc-shaped long groove 305, and the protrusion on the shift block 42 extends into the long groove 305. When the first valve core 20 drives the shift block 42 to rotate, the shift block 42 drives the movable valve core 301 to rotate. A sealing gasket 306 is also provided under the static valve core 302.

[0070] The first valve core 20 has three rotation ranges: a mode switching range and two inactive ranges, one located on either side of the mode switching range. The mode switching range of the first valve core 20 is 45 to 135 degrees. One of the inactive ranges of the first valve core 20 is -45 to 45 degrees. The other inactive range of the first valve core 20 is 135 to 225 degrees.

[0071] The second valve core 30 has three corresponding working states: a stationary state and two mode switching states. When the first valve core 20 is in the mode switching range, the second valve core 30 is in the stationary state. When the first valve core 20 is in the two inactive ranges, the second valve core 30 is in the two mode switching states.

[0072] The present application also provides a thermal management system, comprising the above-mentioned multi-layer valve.

[0073] The present application also provides a vehicle, comprising the above-mentioned thermal management system.

[0074] The multi-layer valve of the present application cooperates or separates the transmission block of the shift block and the second valve core to form multiple rotation intervals, so that when the first valve core rotates, the second valve core rotates coaxially with the first valve core or remains stationary within different rotation intervals, thereby realizing the working condition requirements of the first valve core and the second valve core having different rotation angles.

[0075] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A multi-layer valve, characterized in that: include: A valve body, a first valve core, a second valve core and a transmission structure, wherein an accommodating cavity is formed in the valve body, the first valve core and the second valve core are axially arranged in sequence in the accommodating cavity, the transmission structure is arranged between the first valve core and the second valve core, and the first valve core drives the transmission structure to rotate coaxially; the first valve core has multiple rotation intervals, and in some rotation intervals, the transmission structure cooperates with the second valve core and drives the second valve core to rotate, and in some rotation intervals, the transmission structure is separated from the second valve core, and the second valve core remains stationary.

2. The multi-layer valve according to claim 1, wherein The transmission structure includes a transmission shaft and a shift block. The transmission shaft is fixed to the first valve core and the shift block. The shift block is protrudingly arranged on the outside of the transmission shaft. A transmission block is provided on the upper part of the second valve core. The shift block and the transmission block cooperate circumferentially to drive the second valve core to rotate.

3. The multi-layer valve according to claim 2, wherein: The shift block includes a main body and an extension portion radially protruding from the main body. The main body is sleeved outside the transmission shaft, and the extension portion abuts against the transmission block.

4. The multi-layer valve according to claim 3, wherein The extension portion is fan-shaped and has a first driving surface and a second driving surface on both sides; the transmission block is fan-shaped and has a first mating surface and a second mating surface on both sides; when the first valve core rotates clockwise, the first driving surface can contact the first mating surface, and when the first valve core rotates counterclockwise, the second driving surface can contact the second mating surface.

5. The multi-layer valve according to claim 4, characterized in that The first valve core has three rotation intervals, namely a mode switching interval and two invalid intervals, and the two invalid intervals are respectively located on both sides of the mode switching interval; the second valve core correspondingly has three working states: a stationary state and two mode switching states; when the first valve core is located in the mode switching interval, the second valve core is in the stationary state; when the first valve core is located in the two invalid intervals, the second valve core is in the two mode switching states.

6. The multi-layer valve according to claim 2, wherein: It also includes a limiting mechanism, which is arranged between the second valve core and the valve body. The limiting mechanism includes a first limiting portion arranged on the second valve core and a second limiting portion arranged on the valve body to limit the rotation range of the second valve core.

7. The multi-layer valve according to claim 6, wherein: The first limiting portion is arranged on the upper part of the second valve core and radially outside the shift block, and the height of the first limiting portion exceeds the shift block; a matching area facing the top of the second valve core is provided in the valve body, and the second limiting portion is arranged in the matching area.

8. The multi-layer valve according to claim 7, wherein The first limiting portion includes two limiting protrusions, and a first abutting surface and a second abutting surface are respectively formed on one side of the two limiting protrusions, and the first abutting surface, the second abutting surface and the axis of the second valve core are all arranged in the same plane; the matching area is circular, the second limiting portion is a fan ring, and the first limiting surface and the second limiting surface are respectively provided on both sides of the second limiting portion, and the first abutting surface and the second abutting surface are respectively used to abut against the first limiting surface and the second limiting surface.

9. The multi-layer valve according to claim 1, wherein The valve body includes an upper valve body portion, a lower valve body portion and a partition portion. The upper valve body portion and the partition portion form a first sub-cavity for accommodating the first valve core, and the lower valve body portion and the partition portion form a second sub-cavity for accommodating the second valve core. A sealing partition is provided between the first sub-cavity and the second sub-cavity.

10. The multi-layer valve according to claim 9, wherein The upper valve body and the first valve core together form a first valve, and the lower valve body and the second valve core together form a second valve; the first valve is a proportional valve, and the second valve is a reversing valve.

11. The multi-layer valve according to claim 10, wherein The first valve is a ball valve or a column valve; the second valve is a butterfly valve.

12. The multi-layer valve according to claim 1, wherein It also includes an actuator and a drive shaft. The actuator is arranged on the valve body and is transmission-connected to the first valve core through the drive shaft.

13. A thermal management system, characterized in that: Comprising the multi-layer valve according to any one of claims 1 to 12.

14. A vehicle, characterized in that: Comprising the thermal management system of claim 13.

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