Valve device and thermal management system

Abstract

The utility model discloses a valve device and a thermal management system. The valve device includes a housing in which at least two flow paths are formed; the valve element assembly comprises at least two fixed valve parts and at least two movable valve parts, and each flow path is internally provided with the fixed valve part and the movable valve part which are matched with each other; the driving shaft is connected with the at least two movable valve pieces and used for driving the at least two movable valve pieces to rotate around the first axis so as to synchronously adjust the flow of the at least two flow paths; the valve element assembly further comprises a separation part for separating every two adjacent flow paths, and a heat insulation cavity is formed in each separation part. According to the valve device and the heat management system, the heat insulation cavity is formed in the separation part for separating the two adjacent flow paths, mutual interference of heat between the two adjacent flow paths can be reduced, mutual influence of cold fluid and hot fluid is prevented, energy waste is avoided, cost is saved, and it is guaranteed that the heat management system can operate efficiently.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a valve device and a thermal management system. Background Technology

[0002] Existing thermal management systems include valve devices. These valve devices contain at least two flow paths, each carrying fluids at different temperatures, depending on the requirements of the thermal management system. Furthermore, the temperature difference between the fluids in different flow paths can be significant. For example, the fluid in one flow path might be at 100°C, while the fluid in another flow path might be at -30°C. The heat exchange between fluids at different temperatures in adjacent flow paths interferes with each other, leading to energy waste and impacting the operational efficiency of the thermal management system. Utility Model Content

[0003] This invention provides a valve device and a thermal management system to solve the problem in the prior art where mutual heat interference between adjacent flow paths causes energy waste and affects the operating efficiency of the thermal management system.

[0004] To achieve the above objectives, this utility model provides a valve device, which includes:

[0005] A housing having at least two flow paths formed within it;

[0006] A valve core assembly, comprising at least two fixed valve elements and at least two movable valve elements, wherein each flow path is provided with a cooperating fixed valve element and a movable valve element;

[0007] A drive shaft, the drive shaft being connected to at least two of the moving valves, is used to drive at least two of the moving valves to rotate about a first axis to synchronously regulate the flow rate of at least two of the flow paths;

[0008] The valve core assembly also includes a partition that separates two adjacent flow paths, and the partition has a heat insulation cavity formed inside.

[0009] As a further improvement of this utility model, the valve device further includes a sleeve fitted around the drive shaft, and the heat insulation cavity includes a first heat insulation cavity and / or a second heat insulation cavity. The first heat insulation cavity is formed by the partition and the sleeve, and the second heat insulation cavity is formed by the partition and the shell.

[0010] As a further improvement of this utility model, the housing is provided with heat insulation grooves, and at least a portion of the heat insulation grooves are located between two adjacent flow paths.

[0011] As a further improvement of this utility model, a first flow path and a second flow path are formed inside the housing, and the valve core assembly includes a first moving valve and a first fixed valve disposed in the first flow path, and a second moving valve and a second fixed valve disposed in the second flow path;

[0012] The first moving valve, the first fixed valve, the partition, the second moving valve, and the second fixed valve are arranged sequentially along the first axis.

[0013] As a further improvement of this utility model, the partition and the sleeve surround to form the first heat insulation cavity, and the drive shaft connects the first moving valve and the second moving valve and passes through the partition;

[0014] A cavity is formed within the partition, at least a portion of the drive shaft is located within the cavity, the diameter of the cavity is larger than the diameter of the drive shaft, and one end of the cavity in the first axial direction has an opening communicating with its interior and exterior, the sleeve closes the opening, and the first heat insulation cavity is the space in the cavity not occupied by the drive shaft and the sleeve.

[0015] As a further improvement of this utility model, the partition and the shell surround to form a second heat insulation cavity, and the shell has a first connecting cavity that connects the first flow path and the second flow path. At least part of the partition is disposed in the first connecting cavity, and the second heat insulation cavity is formed by the side wall of the first connecting cavity and the partition.

[0016] As a further improvement of this utility model, the valve device further includes:

[0017] A bushing seat, the bushing seat being located on one side of the valve core assembly in the first axial direction;

[0018] A bushing is fitted around the drive shaft, and a first hemisphere is formed on the side of the bushing facing the bushing seat, and a second hemisphere is formed on the bushing seat to cooperate with the first hemisphere.

[0019] As a further improvement of this utility model, the valve core assembly further includes:

[0020] A supporting part is provided between the partition and the second fixed valve member;

[0021] The second fixed valve member abuts against the abutting portion along the first axis direction, and the bushing seat abuts against the first fixed valve member along the first axis direction. The first fixed valve member, the partition portion, and the abutting portion are integrally formed.

[0022] As a further improvement of this utility model, the first flow path includes a first inlet and a first outlet connecting its interior and exterior, and a first flow channel opening connecting the first inlet and the first outlet is formed on the first fixed valve member. The first movable valve member rotates relative to the second fixed valve member to adjust the opening size of the first flow channel opening.

[0023] The first moving valve has a first adjustment port, which extends circumferentially along the first moving valve and extends through both ends of the first moving valve along the first axis. The first adjustment port is used to connect with the first flow channel when the first moving valve rotates relative to the first fixed valve.

[0024] The first moving valve has a first surface and a second surface opposite each other along the first axis direction. The first surface abuts against the first fixed valve. The outer peripheral wall of the first moving valve is provided with a first communicating portion that communicates with the first adjustment port. The first communicating portion is recessed from the second surface toward the side closer to the second fixed valve.

[0025] This utility model also provides a thermal management system, which includes the valve device described above.

[0026] Beneficial effects:

[0027] In the valve device and thermal management system provided by this utility model, a heat insulation cavity is set inside the partition that separates two adjacent flow paths. This reduces the mutual interference of heat between the two adjacent flow paths, prevents hot and cold fluids from affecting each other, thereby avoiding energy waste, saving costs, and ensuring that the thermal management system can operate efficiently. Attached Figure Description

[0028] Figure 1 This is a cross-sectional schematic diagram of a valve device provided in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A magnified diagram of point A in the middle;

[0030] Figure 3 for Figure 1 A magnified diagram of point B in the middle;

[0031] Figure 4 An exploded view of a portion of the structure of a valve device provided in an embodiment of this utility model;

[0032] Figure 5 for Figure 1 A three-dimensional structural diagram of the first fixed valve component, the partition, and the supporting component;

[0033] Figure 6 for Figure 1A three-dimensional structural diagram of the first moving valve component;

[0034] Figure 7 for Figure 1 Schematic diagram of the structure of the second fixed valve component;

[0035] Figure 8 for Figure 1 Schematic diagram of the structure of the second moving valve component;

[0036] Figure 9 This is a schematic diagram showing the positional relationship between the first flow channel and the second flow channel in a valve device provided in an embodiment of the present invention.

[0037] In the picture:

[0038] 100. Valve device;

[0039] 10. Shell; 11. Flow path; 11a. First flow path; 11b. Second flow path; 111. First inlet; 112. First outlet; 121. Second inlet; 122. Second outlet; 13. Insulation groove; 14. First connecting cavity;

[0040] 20. Valve core assembly; 21. Fixed valve element; 21a. First fixed valve element; 21b. Second fixed valve element; 22. Moving valve element; 22a. First moving valve element; 22b. Second moving valve element; 211. First flow channel opening; 212. Second flow channel opening; 221. First regulating port; 222. Second regulating port; 223. First connecting portion; 224. Second connecting portion; 23. Separating portion; 231. Cavity; 232. Opening; 26. Supporting portion; 27. First opening; 28. Second opening;

[0041] 30. Drive shaft;

[0042] 40. Insulation cavity; 40a. First insulation cavity; 40b. Second insulation cavity;

[0043] 50. First sealing ring; 51. Second sealing ring; 52. Third sealing ring; 53. Fourth sealing ring;

[0044] 60. Bushing; 61. Second hemisphere;

[0045] 70. Bushing; 71. First hemisphere; 72. Snap ring;

[0046] 80. Drive unit; 81. Motor; 82. Gearbox;

[0047] 90. Sleeve. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0049] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0050] like Figure 1-4 As shown, one embodiment of the present invention provides a valve device 100, which includes a housing 10, a valve core assembly 20, and a drive shaft 30.

[0051] The housing 10 has at least two flow paths 11. The valve core assembly 20 includes at least two fixed valve elements 21 and at least two movable valve elements 22. Each flow path 11 is provided with a cooperating fixed valve element 21 and a movable valve element 22. The movable valve element 22 rotates relative to the fixed valve element 21, thereby adjusting the flow rate of the flow path 11 in which the movable valve element 22 and the fixed valve element 21 are located.

[0052] The drive shaft 30 is connected to at least two moving valves 22. The at least two moving valves 22 connected to the drive shaft 30 are driven by the drive shaft 30 to rotate around the first axis. The drive shaft 30 drives the at least two moving valves 22 to rotate around the first axis, which can synchronously adjust the flow rate of at least two flow paths 11.

[0053] The first axis is Figure 1 The axis marked by the label S can be understood as the axis of the shell, and the direction of the first axis is the direction of its extension.

[0054] In this embodiment, the valve core assembly 20 further includes a partition 23 separating two adjacent flow paths 11, and a heat insulation cavity 40 is formed inside the partition 23. The heat insulation cavity 40 has a heat insulation function. By setting the heat insulation cavity 40 inside the partition 23 separating two adjacent flow paths 11, the mutual interference of heat between the two adjacent flow paths 11 can be reduced, and the mutual influence between hot and cold fluids can be prevented, thereby avoiding energy waste and saving costs. When the valve device 100 is used in the thermal management system, it ensures that the thermal management system can operate efficiently.

[0055] Specifically, the heat insulation cavity 40 includes a first heat insulation cavity 40a and a second heat insulation cavity 40b. The valve device 100 also includes a sleeve 90 sleeved around the drive shaft 30. The first heat insulation cavity 40a is formed by the partition 23 and the sleeve 90, and the second heat insulation cavity 40b is formed by the partition 23 and the housing 10.

[0056] The first heat insulation cavity 40a and the second heat insulation cavity 40b are provided to ensure the heat insulation effect between the two adjacent flow channels. The first heat insulation cavity 40a is formed by the partition 23 and the sleeve 90, and the second heat insulation cavity 40b is formed by the partition 23 and the shell 10. This makes full use of the structure on the valve device 100, making the structure of the valve device 100 simpler and more compact.

[0057] In other embodiments of this utility model, the sleeve 90 may be omitted, and the first heat insulation cavity 40a may be formed by the drive shaft 30 and the partition 23.

[0058] In other embodiments of the present invention, the heat insulation cavity 40 may include only the first heat insulation cavity 40a, or only the second heat insulation cavity 40b.

[0059] The housing 10 has a heat insulation groove 13, at least part of which is located between two adjacent flow paths 11. The heat insulation groove 13 at least partially separates the two adjacent flow paths 11, and its function is similar to that of the heat insulation cavity 40, which can reduce the mutual interference of heat between the two adjacent flow paths 11 and prevent hot and cold fluids from affecting each other.

[0060] The housing 10 may have two, three, or even more flow paths 11. In this embodiment, it is described that the housing 10 has two flow paths 11. Specifically, the housing 10 has a first flow path 11a and a second flow path 11b. The valve core assembly 20 includes a first moving valve 22a and a first fixed valve 21a disposed in the first flow path 11a, and a second moving valve 22b and a second fixed valve 21b disposed in the second flow path 11b.

[0061] The first moving valve 22a, the first fixed valve 21a, the partition 23, the second moving valve 22b, and the second fixed valve 21b are arranged sequentially along the first axis, and the valve core assembly 20 has a relatively compact structure. The drive shaft 30 connects the first moving valve 22a and the second moving valve 22b. Under the drive of the drive shaft 30, the first moving valve 22a and the second moving valve 22b can rotate synchronously around the first axis, thereby synchronously adjusting the flow rates of the first flow path 11a and the second flow path 11b.

[0062] In this embodiment, the first fixed valve component 21a and the partition portion 23 are integrally formed. In this way, the first fixed valve component 21a and the partition portion 23 can be processed and formed together to reduce the manufacturing cost of the valve device 100. Furthermore, the integrally formed first fixed valve component 21a and the partition portion 23 can be reliably connected together.

[0063] In other embodiments of this utility model, the first fixed valve member 21a and the partition 23 may also be separately arranged, and the two are separate parts.

[0064] In this embodiment, the drive shaft 30 connects the first moving valve 22a and the second moving valve 22b and passes through the partition 23. A cavity 231 is formed in the partition 23. At least part of the drive shaft 30 is located in the cavity 231. The diameter of the cavity 231 is larger than the diameter of the drive shaft 30. One end of the cavity 231 in the first axial direction has an opening 232 that connects its inside and outside. The sleeve 90 closes the opening 232. The first heat insulation cavity 40a is the space in the cavity 231 that is not occupied by the drive shaft 30 and the sleeve 90.

[0065] An opening 232 is provided at one end of the cavity 231 to facilitate the machining and forming of the cavity 231 on the partition 23. The sleeve 90 closes the opening 232 to ensure the airtightness of the cavity 231. The cavity 231 remains sealed, which is equivalent to the first heat insulation cavity 40a remaining sealed. Since the diameter of the cavity 231 is larger than the diameter of the drive shaft 30, only part of the space in the cavity 231 is occupied by the drive shaft 30. The space in the cavity 231 that is not occupied by the drive shaft 30 and the sleeve 90 is the first heat insulation cavity 40a.

[0066] The housing 10 has a first connecting cavity 14 that connects the first flow path 11a and the second flow path 11b. At least a portion of the partition 23 is disposed within the first connecting cavity 14, separating the first flow path 11a and the second flow path 11b to block the flow between them. The second heat insulation cavity 40b is formed by the side wall of the first connecting cavity 14 and the partition 23. Thus, the second heat insulation cavity 40b is located at the intersection of the heat dissipated by the first flow path 11a and the second flow path 11b, which helps to reduce the heat exchange between the first flow path 11a and the second flow path 11b.

[0067] To ensure the sealing between the partition 23 and the side wall of the first connecting cavity 14, the valve device 100 further includes a first sealing ring 50 disposed between the outer periphery of the partition 23 and the side wall of the first connecting cavity 14.

[0068] In this embodiment, the valve device 100 further includes a second sealing ring 51 disposed between the outer periphery of the first fixed valve member 21 and the housing 10, a third sealing ring 52 disposed between the outer periphery of the second fixed valve member 21 and the housing 10, and a fourth sealing ring 53 disposed between the drive shaft 30 and the partition 23. The second sealing ring 51 prevents fluid from flowing through the gap between the housing 10 and the first fixed valve member 21, ensuring the sealing performance between the housing 10 and the first fixed valve member 21. The third sealing ring 52 prevents fluid from flowing through the gap between the housing 10 and the second fixed valve member 21, ensuring the sealing performance between the housing 10 and the second fixed valve member 21. The fourth sealing ring 53 prevents fluid from flowing through the gap between the drive shaft 30 and the partition 23, ensuring the sealing performance between the drive shaft 30 and the partition 23.

[0069] The valve device 100 also includes a bushing seat 60 and a bushing 70. The bushing seat 60 is located on one side of the valve core assembly 20 in the first axial direction, and the bushing 70 is sleeved around the drive shaft 30. The bushing 70 has a first hemispherical surface 71 on the side facing the bushing seat 60, and a second hemispherical surface 61 that mates with the first hemispherical surface 71 is formed on the bushing seat 60.

[0070] With the cooperation of the first hemisphere 71 and the second hemisphere 61, the drive shaft 30 can adaptively wobble relative to the bushing seat 60, avoiding the problem of positional deviation of the drive shaft 30 caused by installation errors, thermal expansion and other reasons. The drive shaft 30 will not jam when rotating, ensuring that the valve device 100 can operate stably.

[0071] The valve device 100 also includes a retaining ring 72 connected to the drive shaft 30. The retaining ring 72 abuts against the bushing 70 on the side facing the valve core assembly 20 along the first axial direction. The retaining ring 72 abuts against the bushing 70 and defines the position of the bushing 70 in the first axial direction, so that the first hemisphere 71 and the second hemisphere 61 can maintain contact.

[0072] In this embodiment, the valve core assembly 20 further includes a supporting portion 26, which is disposed between the partition portion 23 and the second fixed valve member 21b. The second fixed valve member 21b abuts against the supporting portion 26 along the first axial direction, and the bushing seat 60 abuts against the first fixed valve member 21a along the first axial direction.

[0073] The first fixed valve member 21a, the partition portion 23, and the supporting portion 26 are integrally formed, and all three can be processed and formed simultaneously. This reduces the manufacturing cost of the valve device 100, and the first fixed valve member 21a, the partition portion 23, and the supporting portion 26 can be reliably connected together. When the first fixed valve member 21a, the partition portion 23, and the supporting portion 26 are integrally formed, the second fixed valve member 21b abuts against the supporting portion 26, and the bushing seat 60 abuts against the first fixed valve member 21a along the first axis direction, so that the relative positions of the bushing seat 60, the first fixed valve member 21a, the partition portion 23, the supporting portion 26, and the second fixed valve member 21b in the first axis direction can be kept fixed.

[0074] In other embodiments of this utility model, the first fixed valve 21a, the partition 23 and the supporting part 26 can be separately provided, and each of the three is a separate part.

[0075] The valve device 100 also includes a drive unit 80, which drives the drive shaft 30 to rotate around a first axis. The drive unit 80 includes a motor 81 and a reduction gearbox 82. The reduction gearbox 82 is located between the motor 81 and the drive shaft 30 and is used to amplify the output torque of the motor 81 and transmit the amplified torque to the drive shaft 30. In this way, the motor 81 only needs to output a small torque to drive the drive shaft 30 to rotate.

[0076] Combination Figure 1 , 5 As shown in Figure 8, the first flow path 11a includes a first inlet 111 and a first outlet 112 that connect the inside and outside of it. Fluid can enter the first flow path 11a through the first inlet 111, and fluid in the first flow path 11a can flow out of the first flow path 11a through the first outlet 112.

[0077] A first flow channel 211 is formed on the first fixed valve member 21a, connecting the first inlet 111 and the first outlet 112. The first movable valve member 22a rotates relative to the first fixed valve member 21a to adjust the opening of the first flow channel 211. The larger the opening of the first flow channel 211, the greater the flow rate of the fluid that can pass through the first flow path 11a. When the opening of the first flow channel 211 is zero, that is, when the first flow channel 211 is completely closed, the fluid cannot pass through the first flow path 11a.

[0078] The first movable valve member 22a has a first adjusting port 221, which extends circumferentially along the first movable valve member 22a and extends through both ends of the first movable valve member 22a along the first axis. When the first movable valve member 22a rotates relative to the first fixed valve member 21a, the first adjusting port 221 communicates with the first flow channel port 211, allowing fluid to flow into the first flow channel port through the first adjusting port. The communication area between the first adjusting port 221 and the first flow channel port 211 changes with the rotation of the first movable valve member 22a, and the communication area between the first adjusting port 221 and the first flow channel port 211 determines the opening size of the first flow channel port 211.

[0079] The first moving valve member 22a has a first surface and a second surface opposite to each other along the first axis direction. The first surface abuts against the first fixed valve member 21a. The outer peripheral wall of the first moving valve member 22a is provided with a first connecting part 223 that communicates with the first adjustment port 221. The first connecting part 223 is recessed from the second surface toward the side close to the first fixed valve member 21a.

[0080] The first connecting part 223 is provided so that the fluid can flow in the radial direction of the first moving valve 22a into the first regulating port 221, which reduces the flow resistance of the fluid and ensures the flow capacity of the first flow path 11a.

[0081] The second flow path 11b includes a second inlet 121 and a second outlet 122 that connect the inside and outside of it. Fluid can enter the second flow path 11b through the second inlet 121, and fluid in the second flow path 11b can flow out of the second flow path 11b through the second outlet 122.

[0082] The second fixed valve member 21b has a second flow channel 212 that connects the second inlet 121 and the second outlet 122. The second movable valve member 22b rotates relative to the second fixed valve member 21b to adjust the opening of the second flow channel 212. The larger the opening of the second flow channel 212, the greater the flow rate of the fluid that can pass through the second flow path 11b. When the opening of the second flow channel 212 is zero, that is, when the second flow channel 212 is completely closed, the fluid cannot pass through the second flow path 11b.

[0083] The second moving valve 22b has a second adjusting port 222, which extends circumferentially along the second moving valve 22b and extends through both ends of the second moving valve 22b along the first axis. When the second moving valve 22b rotates relative to the second fixed valve 21b, the second adjusting port 222 communicates with the second flow channel port 212, and the communication area between the two changes with the rotation of the second moving valve 22b. The communication area between the second adjusting port 222 and the second flow channel port 212 determines the opening size of the first flow channel port 211.

[0084] The second moving valve member 22b has a third surface and a fourth surface opposite each other along the first axis direction. The third surface abuts against the second fixed valve member 21b. The outer peripheral wall of the second moving valve member 22b is provided with a second connecting portion 224 that communicates with the second adjusting port 222. The second connecting portion 224 is recessed from the third surface toward the side closer to the second fixed valve member 21b.

[0085] The second connecting part 224 is provided so that the fluid can flow in the radial direction of the second moving valve 22b into the second regulating port 222, which reduces the flow resistance of the fluid and ensures the flow capacity of the second flow path 11b.

[0086] The first moving valve 22a has a first opening 27, which is located at the center of the first moving valve 22a and passes through the first moving valve 22a along the first axis. The drive shaft 30 passes through the first moving valve 22a through the first opening 232 and is connected to the second moving valve 22b.

[0087] The second moving valve component 22b has a second opening 28, into which the drive shaft 30 extends to connect with the second moving valve component 22b via fasteners such as pins. The second opening 28 is a blind hole, extending only to the fourth surface of the second moving valve component 22b along the first axis. Designing the second opening 28 as a blind hole prevents fluid leakage, ensuring the reliability of the operation of both the second moving valve component 22b and the fixed valve component 21b.

[0088] In this embodiment, the first connecting port and the second connecting port are angled in the circumferential direction around the first axis. In this way, the opening sequence of the first connecting port and the second connecting port can be controlled, so that the valve device 100 can complete the corresponding connection function.

[0089] For example, such as Figure 9 As shown, the included angle A between the first connecting port and the second connecting port can be 145°. When the first moving valve 22a and the second moving valve 22b rotate counterclockwise, the first flow channel port 211 is opened first, and the second flow channel port 212 is opened later.

[0090] This utility model also provides a thermal management system, which includes the valve device 100 described above. The thermal management system can be used in equipment such as new energy vehicles, and the valve device 100 is an important component of the thermal management system for controlling the flow of coolant.

[0091] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0092] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A valve device, comprising: a housing, at least two flow paths being formed in the housing; a valve core assembly, the valve core assembly comprising at least two fixed valve members and at least two movable valve members, the fixed valve member and the movable valve member being cooperatively arranged in each of the flow paths; a drive shaft, the drive shaft being connected to the at least two movable valve members for driving the at least two movable valve members to rotate around a first axis to synchronously adjust flow rates of the at least two flow paths; characterized in that: the valve core assembly further comprises a partition portion for partitioning two adjacent flow paths, and a heat insulation cavity is formed in the partition portion.

2. The valve device according to claim 1, characterized in that the valve device further comprises a sleeve, the sleeve being sleeved on the periphery of the drive shaft, the heat insulation cavity comprises a first heat insulation cavity and / or a second heat insulation cavity, the first heat insulation cavity being formed by the partition portion and the sleeve, and the second heat insulation cavity being formed by the partition portion and the housing.

3. The valve device of claim 1, wherein a heat insulation groove is formed on the housing, and at least part of the heat insulation groove is located between two adjacent flow paths.

4. The valve device of claim 2, wherein the housing forms a first flow path and a second flow path, the valve core assembly comprises a first movable valve member and a first fixed valve member arranged in the first flow path, and a second movable valve member and a second fixed valve member arranged in the second flow path; the first movable valve member, the first fixed valve member, the partition portion, the second movable valve member and the second fixed valve member are sequentially arranged along the first axis.

5. The valve device of claim 4, wherein the partition portion and the sleeve form the first heat insulation cavity, the drive shaft is connected to the first movable valve member and the second movable valve member and passes through the partition portion; a cavity is formed in the partition portion, at least part of the drive shaft is located in the cavity, the diameter of the cavity is greater than the diameter of the drive shaft, one end of the cavity in the first axis direction has an opening communicating inside and outside, the sleeve seals the opening, and the first heat insulation cavity is the space in the cavity not occupied by the drive shaft and the sleeve.

6. The valve device of claim 4, wherein the partition portion and the housing form the second heat insulation cavity, the housing is provided with a first communication cavity communicating the first flow path and the second flow path, at least part of the partition portion is arranged in the first communication cavity, and the second heat insulation cavity is formed by the side wall of the first communication cavity and the partition portion.

7. The valve device of claim 4, wherein the valve device further comprises: a shaft sleeve seat, the shaft sleeve seat being located on one side of the valve core assembly in the first axis direction; a shaft sleeve, the shaft sleeve being sleeved on the periphery of the drive shaft, and a first hemispherical surface being formed on the side of the shaft sleeve facing the shaft sleeve seat, and a second hemispherical surface being formed on the shaft sleeve seat and matched with the first hemispherical surface.

8. The valve device of claim 7, wherein the valve core assembly further comprises: a bearing portion, the bearing portion being arranged between the partition portion and the second fixed valve member; the second fixed valve member bears against the bearing portion along the first axis, the shaft sleeve seat bears against the first fixed valve member along the first axis, and the first fixed valve member, the partition portion and the bearing portion are integrally formed.

9. The valve device of claim 4, wherein The first flow path includes a first inlet and a first outlet which are communicated with each other, and the first fixed valve has a first flow channel port which is communicated with the first inlet and the first outlet; the first movable valve is rotated relative to the second fixed valve to adjust the opening size of the first flow channel port; The first movable valve has a first adjusting port which extends along the circumference of the first movable valve and penetrates to both ends of the first movable valve along the first axis direction, and the first adjusting port is communicated with the first flow channel port when the first movable valve is rotated relative to the first fixed valve; The first movable valve has opposite first and second surfaces along the first axis direction, the first surface is in abutment with the first fixed valve, and the outer circumferential wall of the first movable valve is provided with a first communication part which is communicated with the first adjusting port and is recessed from the second surface to the side close to the second fixed valve.

10. A thermal management system characterized by, The valve device comprises the valve device according to any one of claims 1-9.

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