Valve device and thermal management system

Abstract

The utility model provides a valve device and a heat management system, the valve device comprises a valve body and a valve core assembly arranged in the valve body, and the valve core assembly comprises a first fixed valve plate, a second fixed valve plate and a third fixed valve plate; the second fixed valve plate is provided with a second flow channel opening, and the first fixed valve plate and the second fixed valve plate are arranged in a spaced mode in the linear direction; the first movable valve plate and the second movable valve plate are arranged between the first fixed valve plate and the second fixed valve plate, and the second movable valve plate is arranged close to the second fixed valve plate; the first movable valve plate and the second movable valve plate can be driven to move between the first fixed valve plate and the second fixed valve plate in the linear direction, and one of the first movable valve plate and the second movable valve plate can be driven to drive the other one to jointly rotate around the first axis. According to the valve device, the first movable valve plate and the second movable valve plate linearly move and synchronously rotate between the fixed valve plates, so that the flow direction and flow of fluid are accurately controlled.

Description

[0001] This application is based on the Chinese patent application with application number: 202410174480.7 and application date of February 7, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0002] The present invention relates to the field of valve technology, and in particular to a valve device and a thermal management system. Background Art

[0003] With the rapid development of new energy vehicles, the technologies related to the vehicle's thermal management system are also gradually improving, which also means that there are higher requirements for the various valve bodies inside it, and the electronic expansion valve is an indispensable member of the thermal management system.

[0004] Precisely controlling fluid flow direction and flow rate is key to optimizing energy use. Currently, traditional tapered needle expansion valves can only achieve simple one-way circulation functions. When achieving the function of two-way flow, a more complex flow structure needs to be designed, and there may be problems with the inability to accurately control the flow rate.

[0005] Based on this, the present application provides a valve device and a thermal management system to improve the existing technology. Summary of the Invention

[0006] The object of the present invention is to provide a valve device and a thermal management system to solve the problem of accurately controlling the flow direction and flow rate of a fluid.

[0007] In a first aspect, an embodiment of the present invention provides a valve device, comprising a valve body and a valve core assembly disposed within the valve body, wherein the valve body has a plurality of external interfaces, and a fluid path flowing through the valve core assembly is formed between the plurality of external interfaces, wherein the valve core assembly comprises:

[0008] a first fixed valve plate, wherein the first fixed valve plate has a first flow channel opening;

[0009] a second fixed valve plate, the second fixed valve plate having a second flow channel opening, the first fixed valve plate and the second fixed valve plate being arranged in a straight line apart from each other, the first flow channel opening and the second flow channel opening being located on the fluid path;

[0010] a first movable valve plate and a second movable valve plate, wherein the first movable valve plate and the second movable valve plate are arranged between the first fixed valve plate and the second fixed valve plate, and the second movable valve plate is arranged adjacent to the second fixed valve plate; the first movable valve plate and the second movable valve plate can be driven to move between the first fixed valve plate and the second fixed valve plate along the straight line direction, and one of the first movable valve plate and the second movable valve plate can be driven to drive the other to rotate together around the first axis to adjust the size of the opening formed when the first movable valve plate or the second movable valve plate at least partially closes the corresponding flow channel opening.

[0011] In some optional embodiments, one of the first movable valve plate and the second movable valve plate is provided with at least one limiting protrusion extending toward the other, and the other is provided with a limiting groove cooperated with the limiting protrusion to limit the relative position of the first movable valve plate and the second movable valve plate in the rotation direction.

[0012] In some optional embodiments, the limiting protrusion is a fan-shaped protrusion structure, and the long arc surface of the fan-shaped protrusion structure intersects or overlaps with the projection of the outer peripheral surface of the first movable valve plate or the outer peripheral surface of the second movable valve plate on the first fixed valve plate or the second fixed valve plate.

[0013] In some optional embodiments, at least part of the limiting groove has a first groove side wall and a second groove side wall opposite to each other in the rotation direction, and a groove bottom wall, wherein the groove bottom wall is connected to the first groove side wall and the second groove side wall respectively, and the distance between the first groove side wall and the second groove side wall gradually decreases in a direction approaching the groove bottom wall;

[0014] When the first movable valve plate or the second movable valve plate is pressed and approaches each other, the limiting protrusion abuts against the first groove side wall and the second groove side wall to limit the relative position of the first movable valve plate and the second movable valve plate in the rotation direction.

[0015] In some optional embodiments, at least part of the limiting protrusion has a first block side wall that cooperates and abuts against the first groove side wall, a second block side wall that cooperates and abuts against the second groove side wall, and a block top wall, and the distance between the first block side wall and the second block side wall gradually decreases in the direction approaching the block top wall, and the reduction range of the distance between the first block side wall and the second block side wall is not greater than the reduction range of the distance between the first groove side wall and the second groove side wall.

[0016] In some optional embodiments, the valve core assembly further includes:

[0017] A plurality of limit pins are arranged between the first movable valve plate and the second movable valve plate, and the plurality of limit pins are arranged along the circumference of the first movable valve plate and the second movable valve plate to limit the relative position of the first movable valve plate and the second movable valve plate in the rotation direction.

[0018] In some optional embodiments, a first inwardly recessed guide portion is provided on a side of the second movable valve plate close to the first movable valve plate, and the first movable valve plate is provided with a first protrusion engaged with the first guide portion, wherein the first guide portion has a non-circular cross-sectional shape to define the relative position of the first movable valve plate and the second movable valve plate in the rotation direction;

[0019] Alternatively, a second guide portion recessed inwardly is provided on a side of the first movable valve plate close to the second movable valve plate, and the second movable valve plate is provided with a second protrusion engaged with the second guide portion, wherein the second guide portion has a non-circular cross-sectional shape to define the relative position of the first movable valve plate and the second movable valve plate in the rotation direction;

[0020] A projection of the first guide portion or the second guide portion on the first fixed valve plate or the second fixed valve plate intersects with the first axis.

[0021] In some optional embodiments, the valve core assembly further includes:

[0022] a return spring, the return spring being disposed between the first movable valve plate and the second movable valve plate and being respectively connected to the first movable valve plate and the second movable valve plate;

[0023] There are multiple return springs, and the multiple return springs are arranged along the circumferential direction of the first movable valve plate and the second movable valve plate; or the return springs are coaxially arranged with the first axis.

[0024] In some optional embodiments, a positioning shaft hole recessed inwardly is provided on a side of the second fixed valve plate close to the second movable valve plate, and an axis of the positioning shaft hole coincides with the first axis;

[0025] The valve core assembly also includes:

[0026] A positioning shaft, one end of which is connected to the positioning shaft hole and the other end is connected to the second movable valve plate, or the other end passes through the second movable valve plate and is connected to the first movable valve plate, and the axis of the positioning shaft coincides with the first axis.

[0027] To achieve one of the above-mentioned objectives of the invention, an embodiment of the present invention provides a thermal management system, comprising a valve device as described in any one of the above-mentioned items.

[0028] Compared with the conventional technology, the present invention has the following beneficial effects:

[0029] The first movable valve plate and the second movable valve plate are arranged between the first fixed valve plate and the second fixed valve plate and can be driven to move between the first flow channel opening and the second flow channel opening, thereby at least partially closing the first flow channel opening and opening the second flow channel opening, or at least partially closing the second flow channel opening and opening the first flow channel opening; when the movable valve plate at least partially closes the flow channel opening, a throttle port can be formed, and the fluid on the high-pressure side quickly expands to the low-pressure side when entering the throttle port, causing a gas-liquid change, thereby achieving the purpose of cooling. In addition, one of the first movable valve plate and the second movable valve plate can be driven to drive the other to rotate together around the first axis, realizing synchronous rotation of the first movable valve plate and the second movable valve plate, ensuring coordinated action of the first movable valve plate and the second movable valve plate, improving the consistency and accuracy of control, and is particularly suitable for use in thermal management systems of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An exploded schematic diagram of the overall structure of a valve device provided in one embodiment of the present invention;

[0031] Figure 2 A schematic cross-sectional view of the overall structure of a valve device provided in one embodiment of the present invention;

[0032] Figure 3 A schematic structural diagram of a first movable valve plate abutting against a first fixed valve plate provided by an embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of a second movable valve plate abutting against a second fixed valve plate provided by an embodiment of the present invention;

[0034] Figure 5 A schematic structural diagram of a first movable valve plate and a second movable valve plate provided in one embodiment of the present invention;

[0035] Figure 6 A partial cross-sectional schematic diagram of a limiting protrusion and a limiting groove provided in one embodiment of the present invention;

[0036] Figure 7 A schematic structural diagram of a first movable valve plate and a second movable valve plate provided in another embodiment of the present invention;

[0037] Figure 8 A schematic structural diagram of a first movable valve plate and a second movable valve plate provided in yet another embodiment of the present invention;

[0038] Figure 9 for Figure 8 A partial enlarged view of the first movable valve plate and the second movable valve plate.

[0039] Description of reference numerals:

[0040] 100, valve assembly; 110, valve body; 111, external interface; 120, valve core assembly; 121, first fixed valve plate; 1211, first flow channel opening; 122, second fixed valve plate; 1221, second flow channel opening; 123, first movable valve plate; 1231, limiting protrusion; 12311, first block side wall; 12312, second block side wall; 12313, block bottom wall; 12314, long arc surface; 1232, first protrusion Lifting part; 124, second movable valve plate; 1241, limiting groove; 12411, first groove side wall; 12412, second groove side wall; 12413, groove bottom wall; 1242, first guide part; 1243, positioning shaft hole; 125, limiting pin; 126, return spring; 127, positioning shaft; 128, fixed valve plate connector; 130, drive assembly; 131, rotating shaft; 132, drive device; S1, first axis. DETAILED DESCRIPTION

[0041] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0042] It should be understood that the terms used herein, such as "upper," "above," "lower," and "below," etc., indicating spatial relative positions, are used for ease of explanation to describe the relationship of one element or feature relative to another element or feature as shown in the accompanying drawings. Spatially relative terms may be intended to encompass different orientations of the device in use or operation other than the orientation shown in the drawings.

[0043] As we all know, the function of an expansion valve is to reduce the pressure of a fluid, such as refrigerant, and control the rate at which it flows into the evaporator. This is achieved by creating a throttle within the expansion valve. This throttle causes the high-pressure refrigerant to drop in pressure as it passes through, causing it to partially evaporate, thus achieving a cooling effect.

[0044] See also Figure 1 and Figure 2 , Figure 1 This is an exploded schematic diagram of the overall structure of the valve device 100 provided in one embodiment of the present invention. Figure 2 Schematic diagram of the overall structure cross-section of a valve device 100 provided in one embodiment of the present invention.

[0045] An embodiment of the present invention provides a valve device 100, comprising a valve body 110 and a valve core assembly 120 disposed within the valve body 110. The valve body 110 has a plurality of external interfaces 111, and a fluid path through the valve core assembly 120 is formed between the plurality of external interfaces 111. The valve core assembly 120 includes:

[0046] A first fixed valve plate 121 , wherein the first fixed valve plate 121 has a first flow channel opening 1211 ;

[0047] A second fixed valve plate 122, wherein the second fixed valve plate 122 has a second flow channel opening 1221, the first fixed valve plate 121 and the second fixed valve plate 122 are arranged in a straight line and spaced apart from each other, and the first flow channel opening 1211 and the second flow channel opening 1221 are located on the fluid path;

[0048] The first movable valve plate 123 and the second movable valve plate 124 are arranged between the first fixed valve plate 121 and the second fixed valve plate 122, and the second movable valve plate 124 is arranged adjacent to the second fixed valve plate 122; the first movable valve plate 123 and the second movable valve plate 124 can be driven to move between the first fixed valve plate 121 and the second fixed valve plate 122 along the straight line direction, and one of the first movable valve plate 123 and the second movable valve plate 124 can be driven to drive the other to rotate together around the first axis S1 to adjust the size of the opening formed when the first movable valve plate 123 or the second movable valve plate 124 at least partially closes the corresponding flow channel opening.

[0049] The first movable valve plate 123 may also be referred to as a first sub-valve plate, and the second movable valve plate 124 may also be referred to as a second sub-valve plate.

[0050] In this embodiment, the fluid path formed between the external interfaces 111 is the flow path of the refrigerant. The valve device 100 provided in this application can realize the two-way circulation function of the fluid, and the first movable valve plate 123 and the second movable valve plate 124 move between the first fixed valve plate 121 and the second fixed valve plate 122, thereby at least partially closing the first flow channel opening 1211 and opening the second flow channel opening 1221, or at least partially closing the second flow channel opening 1221 and opening the first flow channel opening 1211, thereby realizing the forward and reverse circulation of the fluid.

[0051] As an example, see Figure 3 and Figure 4 , Figure 3 This is a structural diagram of the first movable valve plate 123 abutting against the first fixed valve plate 121 provided in one embodiment of the present invention. Figure 4 This is a structural diagram of the second movable valve plate 124 abutting against the second fixed valve plate 122 provided in one embodiment of the present invention. When the fluid flows from bottom to top, the second movable valve plate 124 moves toward the first movable valve plate 123 under the impact of the fluid, and presses the first movable valve plate 123 against the first fixed valve plate 121, achieving the following Figure 3Similarly, when the fluid flows from top to bottom, under the impact of the fluid, the first movable valve plate 123 moves toward the second movable valve plate 124, and the second movable valve plate 124 abuts against the second fixed valve plate 122, achieving the following Figure 4 The abutment state shown in FIG. At this point, at an appropriate rotation angle, the first movable valve plate 123 or the second movable valve plate 124 can at least partially close the corresponding flow passage opening, thereby forming the aforementioned throttle opening. Furthermore, one of the first movable valve plate 123 and the second movable valve plate 124 can be driven to rotate the other about the first axis S1, achieving synchronous rotation of the first movable valve plate 123 and the second movable valve plate 124, ensuring coordinated movement of the first movable valve plate 123 and the second movable valve plate 124, and improving control consistency and accuracy.

[0052] The embodiments of the present application provide a variety of synchronous rotation structures between movable valve plates, as shown below:

[0053] In the first implementation, see Figure 5 , Figure 5 This is a structural schematic diagram of the first movable valve plate 123 and the second movable valve plate 124 provided in one embodiment of the present invention, wherein one of the first movable valve plate 123 and the second movable valve plate 124 is provided with a limiting protrusion 1231 extending toward the other, while the other is provided with a corresponding limiting groove 1241.

[0054] Specifically, one of the first movable valve plate 123 and the second movable valve plate 124 is provided with at least one limiting protrusion 1231 extending toward the other, and the other is provided with a limiting groove 1241 cooperated with the limiting protrusion 1231 to limit the relative position of the first movable valve plate 123 and the second movable valve plate 124 in the rotation direction.

[0055] In order to reduce the influence of part processing errors on the rotation control of the movable valve plate, the limiting protrusion 1231 is set in a direction away from the first axis S1. At the same time, in order to improve the stability of the synchronous drive structure, the limiting protrusion 1231 is set as a fan-shaped protrusion structure.

[0056] In a preferred embodiment, the limiting protrusion 1231 is a fan-shaped protrusion structure, and the long arc surface 12314 of the fan-shaped protrusion structure intersects or overlaps with the projection of the outer peripheral surface of the first movable valve plate 123 or the outer peripheral surface of the second movable valve plate 124 on the first fixed valve plate 121 or the second fixed valve plate 122.

[0057] like Figure 1 and Figure 5As shown, the long arc surface 12314 of the limiting protrusion 1231 coincides with the projection of the outer circumferential surface of the first movable valve plate 123 on the first fixed valve plate 121 or the second fixed valve plate 122. It is understandable that due to errors in the processing of the first movable valve plate 123 and the second movable valve plate 124, there will also be processing errors between the limiting protrusion 1231 and the limiting groove 1241. In actual operation, the rotating shaft 131 drives the first movable valve plate 123 to rotate, and the first movable valve plate 123, through the cooperation between the limiting protrusion 1231 and the limiting groove 1241, drives the second movable valve plate 124, so that the first movable valve plate 123 and the second movable valve plate 124 rotate synchronously.

[0058] It can be understood that if the limiting protrusion 1231 and the limiting groove 1241 are set at a position closer to the first axis S1, then in order to eliminate the processing error, the rotating shaft 131 needs to be rotated by a certain angle. If the limiting protrusion 1231 and the limiting groove 1241 are set at a position farther away from the first axis S1, for example, at a position coinciding with the outer peripheral surface in this embodiment, then under the same processing error, only a smaller angle of rotation is required, which helps to improve the rotation control accuracy of the movable valve plate.

[0059] In this embodiment, the limiting groove 1241 is configured as a V-shaped structure to further reduce the impact of machining errors on the synchronous rotation.

[0060] Specifically, at least part of the limiting groove 1241 has a first groove side wall 12411 and a second groove side wall 12412 that are opposite to each other in the rotation direction, and a groove bottom wall 12413. The groove bottom wall 12413 is connected to the first groove side wall 12411 and the second groove side wall 12412, respectively. The distance between the first groove side wall 12411 and the second groove side wall 12412 gradually decreases in a direction approaching the groove bottom wall 12413.

[0061] When the first movable valve plate 123 or the second movable valve plate 124 is pressed and approaches each other, the limiting protrusion 1231 abuts against the first groove side wall 12411 and the second groove side wall 12412 to limit the relative position of the first movable valve plate 123 and the second movable valve plate 124 in the rotation direction.

[0062] like Figure 6 As shown, Figure 6The schematic partial cross-sectional view of the limiting protrusion 1231 and the limiting groove 1241 provided in one embodiment of the present invention, the tapered design of the V-shaped groove makes the distance between the first groove side wall 12411 and the second groove side wall 12412 gradually decrease along the direction approaching the groove bottom wall 12413, so that when the first movable valve plate 123 and the second movable valve plate 124 approach each other, the limiting protrusion 1231 is guided by the inclined first groove side wall 12411 or the second groove side wall 12412. Guide, and finally due to the size relationship between the limiting protrusion and the limiting groove, it abuts on the first groove side wall 12411 and the second groove side wall 12412, and the error caused by the asymmetry of the groove side wall is reduced by the tapered groove design. At the same time, the limiting protrusion 1231 does not need to be inserted into the limiting groove 1241 as a whole, and only needs to abut against the first groove side wall 12411 and the second groove side wall 12412, thereby improving the stability of the abutment between the limiting protrusion 1231 and the limiting groove 1241.

[0063] Furthermore, the limiting protrusion 1231 may also be configured as a V-shaped structure to improve the stability of the abutment between the limiting protrusion 1231 and the limiting groove 1241 .

[0064] Specifically, at least part of the limiting protrusion 1231 has a first block side wall 12311 that cooperates and abuts against the first groove side wall 12411, a second block side wall 12312 that cooperates and abuts against the second groove side wall 12412, and a block top wall. The distance between the first block side wall 12311 and the second block side wall 12312 gradually decreases in the direction approaching the block top wall, and the reduction range of the distance between the first block side wall 12311 and the second block side wall 12312 is not greater than the reduction range of the distance between the first groove side wall 12411 and the second groove side wall 12412.

[0065] The distance between the first sidewall 12311 and the second sidewall 12312 of the limiting protrusion 1231 gradually decreases as it approaches the top wall, forming a tapered shape. This matches the V-shaped tapered design of the limiting groove 1241, helping to improve the tightness of the fit. Even with certain manufacturing errors, the fit between the limiting protrusion 1231 and the limiting groove 1241 can still remain relatively stable. At the same time, the reduction in distance between the sidewalls of the limiting protrusion 1231 is no greater than the reduction in distance between the sidewalls of the limiting groove 1241. This prevents the protrusion from contacting the groove sidewalls too closely during rotation, thereby avoiding excessive friction or jamming caused by manufacturing errors.

[0066] In the second implementation, see Figure 7 , Figure 7A schematic structural diagram of a first movable valve plate 123 and a second movable valve plate 124 is provided for another embodiment of the present invention, wherein the first movable valve plate 123 and the second movable valve plate 124 are connected by a separate limit pin 125 to limit the relative position of the first movable valve plate 123 and the second movable valve plate 124 in the rotation direction.

[0067] Specifically, the valve core assembly 120 also includes: a plurality of limit pins 125, which are arranged between the first movable valve plate 123 and the second movable valve plate 124, and the plurality of limit pins 125 are arranged along the circumference of the first movable valve plate 123 and the second movable valve plate 124 to limit the relative position of the first movable valve plate 123 and the second movable valve plate 124 in the rotation direction.

[0068] Multiple circumferentially arranged stop pins 125 mechanically connect the first and second movable valve plates 123, 124, ensuring their synchronous rotation and improving the consistency and accuracy of the movable valve plate operation. Compared to complex geometric fitting structures, the use of stop pins 125 is simpler and more straightforward, easier to implement and maintain. Stop pins 125 are also more adaptable, accommodating movable valve plates of varying sizes and shapes.

[0069] It can be understood that in order not to affect the relative movement of the first movable valve plate 123 and the second movable valve plate 124 in the linear direction, the limiting pin 125 is slidably connected to the first movable valve plate 123 and the second movable valve plate 124.

[0070] In the third implementation, see Figure 8 and Figure 9 , Figure 8 This is a structural diagram of the first movable valve plate 123 and the second movable valve plate 124 provided in another embodiment of the present invention. Figure 9 for Figure 8 A partial enlarged view of the first movable valve plate 123 and the second movable valve plate 124.

[0071] Specifically, a first guide portion 1242 recessed inwardly is provided on a side of the second movable valve plate 124 close to the first movable valve plate 123. The first movable valve plate 123 is provided with a first protrusion 1232 engaged with the first guide portion 1242. The first guide portion 1242 has a non-circular cross-sectional shape to define the relative position of the first movable valve plate 123 and the second movable valve plate 124 in the rotation direction.

[0072] A projection of the first guide portion 1242 on the first fixed valve plate 121 or the second fixed valve plate 122 intersects with the first axis S1 .

[0073] It is understandable that the guide portion may also be provided on the first movable valve plate 123 , and the protrusion portion may be provided on the second movable valve plate 124 .

[0074] Specifically, a second inwardly recessed guide portion is provided on a side of the first movable valve plate 123 close to the second movable valve plate 124, and a second protrusion is provided on the second movable valve plate 124 to cooperate with the second guide portion. The second guide portion has a non-circular cross-sectional shape to define the relative position of the first movable valve plate 123 and the second movable valve plate 124 in the rotation direction.

[0075] A projection of the second guide portion on the first fixed valve plate 121 or the second fixed valve plate 122 intersects with the first axis S1 .

[0076] The projection of the guide portion on the first fixed valve plate 121 or the second fixed valve plate 122 intersects the first axis S1, which means that the first guide portion 1242 and the second guide portion are spatially positioned close to the first axis S1. If the first guide portion 1242 and the second guide portion are generally columnar structures, their central axes coincide with the first axis S1.

[0077] At the same time, non-circular cross-sectional shapes (such as D-shape, rectangle, triangle or polygon, etc.) can provide better mechanical interlocking characteristics and enhance the stability of the movable valve plate during rotation.

[0078] In addition to the above three implementation methods, other synchronous rotation structures of the movable valve plate obtained by simple deformation based on the above three implementation methods will not be described here.

[0079] In this embodiment, a return spring 126 is further provided between the first movable valve plate 123 and the second movable valve plate 124 . The return spring 126 enhances the stability of the first movable valve plate 123 and the second movable valve plate 124 in linear motion.

[0080] Specifically, the valve core assembly 120 further includes:

[0081] a return spring 126 , the return spring 126 being disposed between the first movable valve plate 123 and the second movable valve plate 124 and connecting the first movable valve plate 123 and the second movable valve plate 124 ;

[0082] There are multiple return springs 126 , and the return springs 126 are arranged along the circumferential direction of the first movable valve plate 123 and the second movable valve plate 124 ; or the return springs 126 are coaxially arranged with the first axis S1 .

[0083] refer to Figure 1-2 、 Figure 7-9For the above three implementations, the setting of the return spring 126 can include two basic situations. One situation is as follows: Figure 7-9 As shown, the return spring 126 is coaxially arranged with the first axis S1, that is, the axis of the return spring 126 coincides with or is parallel to the rotation axis 131 of the movable valve plate, that is, coincides with or is parallel to the first axis S1. The coaxial arrangement reduces the complexity of the structure, and the installation and positioning of the spring are more direct and simple. Figure 1-2 As shown, there are multiple return springs 126, and the multiple return springs 126 are arranged along the circumference of the first movable valve plate 123 and the second movable valve plate 124. Multiple springs can more evenly distribute the load, prevent a single spring from being subjected to excessive pressure, reduce local stress concentration, and enhance the stability of the two movable valve plates in all directions. Of course, some spring arrangement schemes derived from the above basic situation should also fall within the scope of protection of this application, such as coaxially sleeved multiple return springs 126 of different diameters, and uniformly or non-uniformly arranged multiple return springs 126 along the circumference or radial direction. The specific schemes are not repeated here.

[0084] In this embodiment, a positioning shaft hole 1243 is provided on a side of the second fixed valve plate 122 close to the second movable valve plate 124. The axis of the positioning shaft hole 1243 coincides with the first axis S1.

[0085] The valve core assembly 120 further includes:

[0086] The positioning shaft 127 has one end connected to the positioning shaft hole 1243 and the other end connected to the second movable valve plate 124, or the other end passes through the second movable valve plate 124 and is connected to the first movable valve plate 123, and the axis of the positioning shaft 127 coincides with the first axis S1.

[0087] See also Figure 1-4 A positioning shaft hole 1243 is provided on the second fixed valve plate 122, and the positioning shaft hole 1243 is a blind hole. One end of the positioning shaft 127 is installed in the positioning shaft hole 1243, and the other end protrudes from the second fixed valve plate 122 and is connected to the corresponding opening of the second movable valve plate 124. The positioning shaft 127 is slidably connected to the second fixed valve plate 122 and / or the second movable valve plate 124, and the axis of the positioning shaft 127 coincides with the rotation axis 131 of the movable valve plate, that is, coincides with the first axis S1, thereby realizing concentric limitation of the second movable valve plate 124.

[0088] The concentric limit of the second movable valve plate 124 by the positioning shaft 127 ensures that the second movable valve plate 124 can accurately rotate around the first axis S1, maintaining the concentricity of the two movable valve plates. Since the first movable valve plate 123 and the second movable valve plate 124 rotate synchronously, the concentric limit can ensure the coordinated movement of the two.

[0089] In some embodiments, the positioning shaft 127 may be integrally formed with the second movable valve plate 124 , or may be integrally formed with the first movable valve plate 123 , and the specific implementation scheme will not be repeated here.

[0090] In addition, an embodiment of the present invention further provides a thermal management system for a vehicle, in which the valve device 100 described above is provided.

[0091] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0092] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve device comprising a valve body and a valve core assembly disposed in the valve body, wherein the valve body has a plurality of external interfaces, and a fluid path flowing through the valve core assembly is formed between the plurality of external interfaces, characterized in that: The valve core assembly includes: a first fixed valve plate, wherein the first fixed valve plate has a first flow channel opening; a second fixed valve plate, the second fixed valve plate having a second flow channel opening, the first fixed valve plate and the second fixed valve plate being arranged in a straight line apart from each other, the first flow channel opening and the second flow channel opening being located on the fluid path; a first movable valve plate and a second movable valve plate, wherein the first movable valve plate and the second movable valve plate are arranged between the first fixed valve plate and the second fixed valve plate, and the second movable valve plate is arranged adjacent to the second fixed valve plate; the first movable valve plate and the second movable valve plate can be driven to move between the first fixed valve plate and the second fixed valve plate along the straight line direction, and one of the first movable valve plate and the second movable valve plate can be driven to drive the other to rotate together around the first axis to adjust the size of the opening formed when the first movable valve plate or the second movable valve plate at least partially closes the corresponding flow channel opening.

2. The valve device according to claim 1, characterized in that One of the first movable valve plate and the second movable valve plate is provided with at least one limiting protrusion extending toward the other, and the other is provided with a limiting groove cooperated with the limiting protrusion to limit the relative position of the first movable valve plate and the second movable valve plate in the rotation direction.

3. The valve device according to claim 2, characterized in that The limiting protrusion is a fan-shaped convex column structure, and the long arc surface of the fan-shaped convex column structure intersects or overlaps with the projection of the outer circumference of the first movable valve plate or the outer circumference of the second movable valve plate on the first fixed valve plate or the second fixed valve plate.

4. The valve device according to claim 2, characterized in that At least part of the limiting groove has a first groove side wall and a second groove side wall opposite to each other in the rotation direction, and a groove bottom wall, wherein the groove bottom wall is connected to the first groove side wall and the second groove side wall respectively, and the distance between the first groove side wall and the second groove side wall gradually decreases in a direction approaching the groove bottom wall; When the first movable valve plate or the second movable valve plate is pressed and approaches each other, the limiting protrusion abuts against the first groove side wall and the second groove side wall to limit the relative position of the first movable valve plate and the second movable valve plate in the rotation direction.

5. The valve device according to claim 4, characterized in that At least part of the limiting protrusion has a first block side wall that cooperates and abuts against the first groove side wall, a second block side wall that cooperates and abuts against the second groove side wall, and a block top wall. The distance between the first block side wall and the second block side wall gradually decreases in the direction approaching the block top wall, and the reduction range of the distance between the first block side wall and the second block side wall is not greater than the reduction range of the distance between the first groove side wall and the second groove side wall.

6. The valve device according to claim 1, characterized in that The valve core assembly also includes: A plurality of limit pins are arranged between the first movable valve plate and the second movable valve plate, and the plurality of limit pins are arranged along the circumference of the first movable valve plate and the second movable valve plate to limit the relative position of the first movable valve plate and the second movable valve plate in the rotation direction.

7. The valve device according to claim 1, characterized in that A first guide portion recessed inwardly is provided on a side of the second movable valve plate close to the first movable valve plate, and a first protrusion engaged with the first guide portion is provided on the first movable valve plate. The first guide portion has a non-circular cross-sectional shape to define the relative position of the first movable valve plate and the second movable valve plate in the rotation direction. Alternatively, a second guide portion recessed inwardly is provided on a side of the first movable valve plate close to the second movable valve plate, and the second movable valve plate is provided with a second protrusion engaged with the second guide portion, wherein the second guide portion has a non-circular cross-sectional shape to define the relative position of the first movable valve plate and the second movable valve plate in the rotation direction; A projection of the first guide portion or the second guide portion on the first fixed valve plate or the second fixed valve plate intersects with the first axis.

8. The valve device according to any one of claims 1 to 7, characterized in that: The valve core assembly also includes: a return spring, the return spring being disposed between the first movable valve plate and the second movable valve plate and being respectively connected to the first movable valve plate and the second movable valve plate; There are multiple return springs, and the multiple return springs are arranged along the circumferential direction of the first movable valve plate and the second movable valve plate; or the return springs are coaxially arranged with the first axis.

9. The valve device according to any one of claims 1 to 7, characterized in that: A positioning shaft hole is provided on a side of the second fixed valve plate close to the second movable valve plate, and the axis of the positioning shaft hole coincides with the first axis; The valve core assembly also includes: A positioning shaft, one end of which is connected to the positioning shaft hole and the other end is connected to the second movable valve plate, or the other end passes through the second movable valve plate and is connected to the first movable valve plate, and the axis of the positioning shaft coincides with the first axis.

10. A thermal management system, characterized in that: The invention comprises the valve device according to any one of claims 1 to 9.

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