Valve device and thermal management system

Abstract

A valve device and a thermal management system. The valve device (100) comprises a first flow channel port (111) and a second flow channel port (121) which are arranged at a distance, and a fluid path is formed between the first flow channel port and the second flow channel port. The valve device further comprises: a moving member (130), wherein the moving member is located between the first flow channel port and the second flow channel port, and can be driven to move between the first flow channel port and the second flow channel port, so as to at least partially close the first flow channel port and open the second flow channel port, or at least partially close the second flow channel port and open the first flow channel port; and the moving member can also be driven to rotate around a first axis (S1), so as to adjust, by changing the rotating angle of the moving member, the size of an opening formed when the moving member at least partially closes the corresponding flow channel port. The valve device can realize the throttling function of an expansion valve, and can realize the function of forward and reverse switching of fluid flow.

Description

Valve device and thermal management system

[0001] This application is based on the Chinese patent application with application number: 202410174480.7 and application date of February 7, 2024, and the Chinese patent application with application number: 202411545500.3 and application date of October 31, 2024, and claims the priority of these two Chinese patent applications, all of which are 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] The operating principle of an electronic expansion valve is to control the temperature or pressure signals fed back from the evaporator or condenser. This pulse signal is sent through an actuator to control the stator of a stepper motor, which drives the rotor inside the valve body to rotate. The rotor, through gears, moves a tapered needle up and down, thereby increasing or decreasing the flow rate. However, existing electronic expansion valves suffer from short strokes, long opening and closing times, and limited pressure resistance, making it difficult to switch the flow in both directions.

[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 capable of switching the flow of fluid in forward and reverse directions.

[0007] In a first aspect, an embodiment of the present invention provides a valve device, comprising a first flow channel opening and a second flow channel opening disposed apart from each other, wherein a fluid path is formed between the first flow channel opening and the second flow channel opening, wherein the valve device further comprises:

[0008] A moving part, which is located between the first flow channel opening and the second flow channel opening, and can be driven to move between the first flow channel opening and the second flow channel opening to at least partially close the first flow channel opening and open the second flow channel opening, or to at least partially close the second flow channel opening and open the first flow channel opening; and the moving part can also be driven to rotate around a first axis to adjust the size of the opening formed when the moving part at least partially closes the corresponding flow channel opening by changing the rotation angle of the moving part.

[0009] In some optional embodiments, the first flow channel opening and the second flow channel opening are spaced apart in a linear direction, and when the moving member moves to a first position in the linear direction, the first flow channel opening is at least partially closed and the second flow channel opening is opened, and an open cross-sectional area of ​​the second flow channel opening is larger than an open cross-sectional area of ​​the first flow channel opening;

[0010] When the moving member moves to the second position in the linear direction, the second flow channel opening is at least partially closed and the first flow channel opening is opened, and the open cross-sectional area of ​​the first flow channel opening is larger than the open cross-sectional area of ​​the second flow channel opening.

[0011] In some optional embodiments, the first flow channel opening and the second flow channel opening are respectively formed on the first surface and the second surface inside the valve device; the moving part includes a first end face and a second end face relative to each other, and the moving part abuts against the first surface through the first end face when the moving part is in the first position, and abuts against the second surface through the second end face when the moving part is in the second position, and the first end face, the second end face, the first surface and the second surface are all planes and any two of them are parallel to each other.

[0012] In some optional embodiments, the moving part is provided with a communication portion to allow fluid to pass through the moving part; when the moving part abuts the first surface, the projection of the communication portion on the first surface at least partially overlaps with the first flow channel opening, and the overlapping area is the open cross-sectional area of ​​the first flow channel opening; when the moving part abuts the second surface, the projection of the communication portion on the second surface at least partially overlaps with the second flow channel opening, and the overlapping area is the open cross-sectional area of ​​the second flow channel opening.

[0013] In some optional embodiments, the valve device further comprises:

[0014] a first fixed valve plate, wherein the first flow channel opening is provided on the first fixed valve plate, and the first surface is an end surface of the first fixed valve plate;

[0015] a second fixed valve plate, wherein the second flow channel opening is provided on the second fixed valve plate, and the second surface is an end surface of the second fixed valve plate;

[0016] A movable valve plate, the movable valve plate is located between the first fixed valve plate and the second fixed valve plate, the moving part is formed by the movable valve plate, and the movable valve plate is driven to move along the straight line direction toward the first fixed valve plate or the second fixed valve plate under the pressure of the fluid to abut against the first surface or the second surface.

[0017] In some optional embodiments, the valve device further comprises: a drive assembly, the drive assembly comprising a rotating shaft and a drive structure for driving the rotating shaft to rotate, the axis of the rotating shaft coincides with the first axis;

[0018] The movable valve plate is provided with a movable valve plate connecting portion that is connected to the rotating shaft in cooperation with the movable valve plate connecting portion, the movable valve plate connecting portion is a blind hole or a sunken groove, and the movable valve plate connecting portion has a non-circular cross-sectional shape;

[0019] The rotating shaft includes a rotating shaft connecting portion that cooperates with the movable valve plate connecting portion. The first fixed valve plate is provided with a rotating shaft through hole for the rotating shaft to pass through. The rotating shaft passes through the rotating shaft through hole to connect with the movable valve plate and drive the movable valve plate to rotate.

[0020] In some optional embodiments, the movable valve plate includes a first sub-valve plate and a second sub-valve plate, the first sub-valve plate is closer to the first fixed valve plate than the second sub-valve plate, and the first sub-valve plate and the second sub-valve plate rotate synchronously around the first axis; the movable valve plate connecting portion is provided on the side of the first sub-valve plate close to the first fixed valve plate.

[0021] In some optional embodiments, a return spring is provided between the first sub-valve plate and the second sub-valve plate, and the return spring is used to generate a force to press the first sub-valve plate against the first fixed valve plate, and / or a force to press the second sub-valve plate against the second fixed valve plate.

[0022] In some optional embodiments, the movable valve plate further comprises at least one movable valve plate positioning pin, wherein the at least one movable valve plate positioning pin is arranged along the circumferential direction of the movable valve plate and is arranged between the first sub-valve plate and the second sub-valve plate to define the relative position of the first sub-valve plate and the second sub-valve plate;

[0023] Alternatively, a first guide portion recessed inwardly is provided on a side of the second sub-valve plate close to the first sub-valve plate, and the first sub-valve plate is provided with a first protrusion engaged with the first guide portion, and the first guide portion has a non-circular cross-sectional shape; or, a second guide portion recessed inwardly is provided on a side of the first sub-valve plate close to the second sub-valve plate, and the second sub-valve plate is provided with a second protrusion engaged with the second guide portion, and the second guide portion has a non-circular cross-sectional shape, so as to define the relative position of the first sub-valve plate and the second sub-valve plate;

[0024] Or, the first sub-valve plate is provided with at least one first limiting protrusion extending toward the second sub-valve plate, and the second sub-valve plate is provided with a first limiting recess cooperated with and connected to each of the first limiting protrusions; or, the second sub-valve plate is provided with at least one second limiting protrusion extending toward the first sub-valve plate, and the first sub-valve plate 132 is provided with a second limiting recess cooperated with and connected to each of the second limiting protrusions to limit the relative position of the first sub-valve plate and the second sub-valve plate.

[0025] In some optional embodiments, a stroke space is formed between the movable valve plate connecting portion and the rotating shaft connecting portion; the movable valve plate connecting portion is provided with at least one drain portion, and the drain portion is used to guide the fluid therein to be discharged when the stroke space contracts, and the depth of the movable valve plate connecting portion is not less than the maximum length of the rotating shaft connecting portion entering the movable valve plate connecting portion.

[0026] In some optional embodiments, the first fixed valve plate includes at least one positioning protrusion, which extends from the body of the first fixed valve plate toward the direction of the drive assembly; the drive assembly also includes a limiting rod fixedly connected to the rotating shaft, and the limiting rod is driven to rotate by the rotating shaft, and the rotation plane of the limiting rod intersects with the positioning protrusion.

[0027] In some optional embodiments, the drive assembly further includes a bearing seat, and a positioning groove matching the shape of the end of the positioning protrusion is provided on a side of the bearing seat close to the first fixed valve plate to accommodate the end of the positioning protrusion.

[0028] 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.

[0029] Compared with the commonly used technology, the present invention has the following beneficial effects: the moving part 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 moving part at least partially closes the flow channel opening, the above-mentioned throttling port can be formed, and the fluid on the high-pressure side quickly expands to the low-pressure side when entering the throttling port, causing a gas-liquid change, thereby achieving the purpose of cooling. At the same time, the size of the formed throttling port is adjusted by driving the moving part to rotate, thereby controlling the flow rate flowing through the throttling port, and adjusting the size of the throttling port as needed to optimize the cooling effect. The valve device of the present application can realize the function of an expansion valve, and at the same time can solve the problem of forward and reverse switching of fluid flow, and is particularly suitable for use in the thermal management system of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of the overall structure of a valve device provided by one embodiment of the present invention;

[0031] FIG2 is a schematic cross-sectional view of the movable valve plate in a second position according to an embodiment of the present invention;

[0032] FIG3 is a schematic structural diagram of a movable valve plate provided in one embodiment of the present invention;

[0033] FIG4 is a schematic cross-sectional view of the movable valve plate in a first position according to an embodiment of the present invention;

[0034] FIG5 is a schematic diagram of an open cross-sectional area of ​​a first flow channel opening provided by one embodiment of the present invention;

[0035] FIG6 is a schematic cross-sectional view of a two-piece movable valve plate according to an embodiment of the present invention;

[0036] FIG7 is a partial enlarged view of the movable valve plate structure in FIG6;

[0037] FIG8 is a schematic cross-sectional view of a two-piece movable valve plate according to another embodiment of the present invention;

[0038] FIG9 is a schematic cross-sectional view of a two-piece movable valve plate according to another embodiment of the present invention;

[0039] FIG10 is a schematic structural diagram of the movable valve plate structure in FIG9;

[0040] FIG11 is a schematic diagram of a rotation axis limiting structure provided by an embodiment of the present invention;

[0041] FIG12 is a schematic structural diagram of a first fixed valve plate provided in one embodiment of the present invention;

[0042] FIG13 is a schematic diagram of a rotation axis limiting structure provided by another embodiment of the present invention;

[0043] FIG14 is a schematic structural diagram of a bearing seat provided in one embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 100. Valve device; 110. First fixed valve plate; 111. First flow channel opening; 112. First surface; 113. Rotating shaft through hole; 120. Second fixed valve plate; 121. Second flow channel opening; 122. Second surface; 130. Moving member; 131. Moving valve plate; 132. First sub-valve plate; 133. Second sub-valve plate; 134. Flow portion; 135. Stroke space; 1311. First end surface; 1312. Second end surface; 1313. Moving valve plate connecting portion; 1314. Evacuation portion; 1321. First protrusion; 1324. First position-limiting protrusion; 1331. First guide portion; 1333. First position-limiting recess; 140. Driving assembly; 141. Rotating shaft; 142. Driving structure; 143. Reducer housing; 145. Limit rod; 146. Positioning column; 147. Bearing seat; 148. Positioning protrusion; 1411. Rotating shaft connection part; 1471. Positioning groove; 151. Return spring; 152. Movable valve plate positioning pin; 160. Positioning shaft; 170. Valve seat; 171. First interface; 172. Second interface; 180. Valve plate connector; S1. First axis; S2. First rotation direction. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 1 and 2 , FIG1 is a schematic diagram of the overall structure of a valve device 100 provided in one embodiment of the present invention, and FIG2 is a schematic diagram of the cross-sectional structure of a movable valve plate in a second position provided in one embodiment of the present invention.

[0049] An embodiment of the present invention provides a valve device 100, comprising a first flow channel opening 111 and a second flow channel opening 121 disposed apart from each other, wherein a fluid path is formed between the first flow channel opening 111 and the second flow channel opening 121. The valve device 100 further comprises:

[0050] The moving part 130 is located between the first flow channel opening 111 and the second flow channel opening 121, and can be driven to move between the first flow channel opening 111 and the second flow channel opening 121 to at least partially close the first flow channel opening 111 and open the second flow channel opening 121, or to at least partially close the second flow channel opening 121 and open the first flow channel opening 111; and the moving part 130 can also be driven to rotate around the first axis S1 to adjust the size of the opening formed when the moving part 130 at least partially closes the corresponding flow channel opening by changing the rotation angle of the moving part 130.

[0051] 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.

[0052] The valve device 100 of the present application also includes a valve seat 170, on which a first interface 171 and a second interface 172 are provided. The first interface 171 is fluidically connected to the first flow channel opening 111, and the second interface 172 is fluidically connected to the second flow channel opening 121. The first interface 171 and the second interface 172 are respectively used to connect external fluids.

[0053] In the present application, the moving part 130 can be driven to move between the first flow channel opening 111 and the second flow channel opening 121, thereby at least partially closing the first flow channel opening 111 and opening the second flow channel opening 121, or at least partially closing the second flow channel opening 121 and opening the first flow channel opening 111; when the moving part 130 at least partially closes the flow channel opening, the above-mentioned throttling port can be formed, and the fluid on the high-pressure side quickly expands to the low-pressure side when entering the throttling port, resulting in gas-liquid changes, thereby achieving the purpose of cooling.

[0054] At the same time, the size of the formed throttle opening is adjusted by driving the moving part 130 to rotate, thereby controlling the flow rate flowing through the throttle opening. The size of the throttle opening is adjusted as needed to optimize the cooling effect.

[0055] The valve device 100 of the present application can not only realize the function of an expansion valve, but also solve the bidirectional flow of the fluid, that is, realize the forward and reverse switching of the fluid flow, and is particularly suitable for the thermal management system of new energy vehicles.

[0056] In this embodiment, the first flow channel opening 111 and the second flow channel opening 121 are arranged apart in a straight line direction. The straight line layout makes the flow direction and operation in the valve more intuitive and also facilitates the movement of the moving part 130 in the straight line direction.

[0057] When the moving part 130 moves to the first position in the straight direction, it at least partially closes the first flow channel opening 111 and opens the second flow channel opening 121, and the open cross-sectional area of ​​the second flow channel opening 121 is larger than the open cross-sectional area of ​​the first flow channel opening 111; when the moving part 130 moves to the second position in the straight direction, it at least partially closes the second flow channel opening 121 and opens the first flow channel opening 111, and the open cross-sectional area of ​​the first flow channel opening 111 is larger than the open cross-sectional area of ​​the second flow channel opening 121.

[0058] The first position refers to the position where the moving member 130 abuts the first flow channel opening 111 in a linear direction, and the second position refers to the position where the moving member 130 abuts the second flow channel opening 121 in a linear direction. The open cross-sectional area refers to the cross-sectional area for fluid to pass through. The larger the open cross-sectional area, the greater the fluid flow rate allowed to pass through.

[0059] When the moving member 130 is in the first position, the moving member 130 partially closes the first flow passage 111, thereby reducing the original open cross-sectional area of ​​the first flow passage 111 and forming the aforementioned throttle opening at the location of the first flow passage 111. When the moving member 130 is in the second position, the moving member 130 partially closes the second flow passage 121, thereby reducing the original open cross-sectional area of ​​the second flow passage 121 and forming the aforementioned throttle opening at the location of the second flow passage 121.

[0060] To achieve precise control of fluid flow, when the moving member 130 partially closes one of the flow passages, the fluid must minimize gas-liquid phase changes at the other flow passage. Therefore, the open cross-sectional area of ​​the closed flow passage is smaller than that of the open flow passage. When the moving member 130 is in the first position, the second flow passage 121 is simultaneously opened, thereby preventing significant gas-liquid phase changes at the second flow passage 121. Similarly, when the moving member 130 is in the second position, the first flow passage 111 is simultaneously opened, thereby preventing significant gas-liquid phase changes at the first flow passage 111.

[0061] 2 , 3 and 4 , FIG. 3 is a schematic structural diagram of a movable valve plate provided in one embodiment of the present invention, and FIG. 4 is a schematic cross-sectional structural diagram of a movable valve plate located in a first position provided in one embodiment of the present invention.

[0062] In this embodiment, the first flow channel opening 111 and the second flow channel opening 121 are respectively formed on the first surface 112 and the second surface 122 inside the valve device 100; the moving part 130 includes a first end face 1311 and a second end face 1312 relative to each other, and the moving part 130 abuts against the first surface 112 through the first end face 1311 when it is in the first position, and abuts against the second surface 122 through the second end face 1312 when it is in the second position, the first end face 1311, the second end face 1312, the first surface 112 and the second surface 122 are all planes and any two of them are parallel to each other.

[0063] It will be appreciated that the valve device 100 has two distinct surfaces within it, namely, a first surface 112 and a second surface 122. The first surface 112 and the second surface 122 each correspond to a flow opening, and the first surface 112 and the second surface 122 are spaced apart. The first flow opening 111 and the second flow opening 121 are fluidically connected to each other through the interior of the valve body, forming a complete fluid path. This allows fluid to flow into one flow opening, pass through the fluid path within the valve body, and then flow out of the other flow opening.

[0064] First end face 1311, second end face 1312, first surface 112, and second surface 122 are all planar, and the contact between the planar surfaces provides a better sealing effect. When the end face of moving part 130 contacts the surface of the valve body, the contact area between the planar surfaces is larger, thereby reducing the possibility of leakage. Simultaneously, the planar design allows moving part 130 to more precisely control its position during movement. The parallel relationship between the planar surfaces ensures the rotational motion of moving part 130, facilitating precise control of the size of the throttle. Furthermore, the planar and mutually parallel design simplifies the processing and manufacturing of parts, facilitating subsequent maintenance and replacement.

[0065] In this embodiment, the first flow channel opening 111 and the second flow channel opening 121 are respectively formed on the first surface 112 and the second surface 122 inside the valve device 100, and the moving part 130 abuts against the first surface 112 and does not abut against the second surface 122 when it is in the first position, and the moving part 130 abuts against the second surface 122 and does not abut against the first surface 112 when it is in the second position.

[0066] That is to say, when the moving part 130 abuts against the first flow opening 111 or the second flow opening 121, it completely releases the control over the other flow opening, and the fluid can flow directly to the closed flow opening through the unclosed flow opening, further reducing the impact of the unclosed flow opening on fluid circulation.

[0067] In this embodiment, a flow portion 134 is provided on the moving part 130 to allow fluid to pass through the moving part 130; when the moving part 130 abuts against the first surface 112, the projection of the flow portion 134 on the first surface 112 at least partially overlaps with the first flow channel opening 111, and the overlapping area is the open cross-sectional area of ​​the first flow channel opening 111; when the moving part 130 abuts against the second surface 122, the projection of the flow portion 134 on the second surface 122 at least partially overlaps with the second flow channel opening 121, and the overlapping area is the open cross-sectional area of ​​the second flow channel opening 121.

[0068] As shown in Figure 5, Figure 5 is a schematic diagram of the open cross-sectional area of ​​the first flow channel opening 111 according to one embodiment of the present invention. The portion where the projection of the flow portion 134 on the first surface 112 overlaps with the first flow channel opening 111 represents the open cross-sectional area of ​​the first flow channel opening 111. When the moving member 130 abuts the first surface 112, fluid can only pass through this overlapping portion.

[0069] The flow passage 134 on the moving member 130 selectively directs fluid to the first flow passage 111 or the second flow passage 121, depending on the position of the moving member 130 relative to the first surface 112 or the second surface 122. When the moving member 130 abuts a surface, the size of the opening formed by the flow passage 134 and the corresponding flow passage directly determines the fluid flow rate. By precisely controlling the position of the moving member 130 relative to the flow passage, the overlap area between the flow passage 134 and the flow passage can be adjusted, thereby achieving precise flow regulation and a throttling effect.

[0070] The above is a general description of the principle of the valve device 100 of the present application. The specific structure thereof will be described in detail below.

[0071] Referring to FIG. 2 , in this embodiment, the valve device 100 further includes:

[0072] A first fixed valve plate 110 , wherein the first flow channel opening 111 is provided on the first fixed valve plate 110 , and the first surface 112 is an end surface of the first fixed valve plate 110 ;

[0073] A second fixed valve plate 120 , wherein the second flow channel opening 121 is provided on the second fixed valve plate 120 , and the second surface 122 is an end surface of the second fixed valve plate 120 ;

[0074] The movable valve plate 131 is located between the first fixed valve plate 110 and the second fixed valve plate 120. The moving part 130 is formed by the movable valve plate 131. The movable valve plate 131 is driven to move along the straight line toward the first fixed valve plate 110 or the second fixed valve plate 120 under the pressure of the fluid to abut against the first surface 112 or the second surface 122.

[0075] The first fixed valve plate 110 and the second fixed valve plate 120 are respectively provided with a first flow channel opening 111 and a second flow channel opening 121, and their opposite end surfaces serve as a first surface 112 and a second surface 122, respectively, thereby fixing the positions of the two flow channel openings and providing certainty for the flow direction of the fluid.

[0076] The movable valve plate 131 is located between the first fixed valve plate 110 and the second fixed valve plate 120, and together they form the moving member 130. Under the pressure of the fluid, the movable valve plate 131 can move linearly toward the first fixed valve plate 110 or the second fixed valve plate 120 to abut against the first surface 112 or the second surface 122. This allows the movable valve plate 131 to automatically adjust its position based on changes in fluid pressure, thereby changing the relative position of the flow portion 134 and the flow channel opening, thereby adjusting the flow rate and flow direction.

[0077] As an example, fluid entering through the first flow channel opening 111 of the first fixed valve plate 110 impacts the movable valve plate 131. Under the pressure of the fluid, the movable valve plate 131 moves toward the second fixed valve plate 120 to abut against the second surface 122 of the second fixed valve plate 120. The movement of the movable valve plate 131 is entirely dependent on the pressure of the fluid, meaning that the valve device 100 can automatically adjust according to changes in the fluid pressure therein without the need for external power input, thereby improving the response speed and efficiency of flow direction switching.

[0078] Referring to Figures 1 and 3, in this embodiment, the valve device 100 also includes a drive assembly 140, which includes a rotating shaft 141 and a drive structure 142 for driving the rotating shaft 141 to rotate. The movable valve plate 131 is provided with a movable valve plate connecting portion 1313 that cooperates with the rotating shaft 141 on the side close to the first fixed valve plate 110, so as to be driven by the rotating shaft 141 to rotate; the movable valve plate 131 moves along the axial direction of the rotating shaft 141 under the pressure of the fluid, and the axis of the rotating shaft 141 coincides with the first axis S1.

[0079] The rotating shaft 141 provides a reference axis for the movable valve plate 131 to rotate. The movable valve plate 131 is connected to the rotating shaft 141 via a movable valve plate connecting portion 1313 that cooperates with the rotating shaft 141 , so that the movable valve plate 131 can rotate with the rotating shaft 141 .

[0080] The driving structure 142 is responsible for driving the rotation of the rotating shaft 141 , and may be a motor, a hydraulic or pneumatic drive system, etc., which is not limited here and can be determined according to actual application requirements.

[0081] The movable valve plate 131 can not only rotate under the drive of the rotating shaft 141, but also move along the axis of the rotating shaft 141 under the action of fluid pressure. This dual motion greatly enhances the ability of the valve device 100 to regulate the flow direction and flow rate of the fluid.

[0082] In this embodiment, the movable valve plate connecting portion 1313 is a blind hole or a sunken groove, and the movable valve plate connecting portion 1313 has a non-circular cross-sectional shape;

[0083] The rotating shaft 141 includes a rotating shaft connecting portion 1411 that cooperates with the movable valve plate connecting portion 1313. The first fixed valve plate 110 is provided with a rotating shaft through hole 113 for the rotating shaft 141 to pass through. The rotating shaft 141 passes through the rotating shaft through hole 113 to be connected to the movable valve plate 131 and drive the movable valve plate 131 to rotate.

[0084] The movable valve plate connection portion 1313 adopts a non-circular cross-sectional shape (e.g., square, elliptical, or other polygonal shape) to effectively prevent the movable valve plate 131 from slipping or misaligning when the rotating shaft 141 rotates, thereby ensuring the accuracy and stability of the rotation transmission. Furthermore, the movable valve plate connection portion 1313 adopts the form of a blind hole or a countersunk groove. This is done, on the one hand, to simplify the processing process, allowing the movable valve plate connection portion 1313 to be located inside the movable valve plate 131, thereby reducing the external dimensions and improving the compactness of the entire valve device 100. On the other hand, it is done to prevent the movable valve plate 131 from being penetrated. It is understood that if the valve plate connection portion were a through hole, fluid would leak from the valve plate connection portion, causing the movable valve plate 131 to fail due to fluid pressure and the abutment between the fixed valve plate 131 and the fixed valve plate. Conversely, if the valve plate connection portion is a blind hole or a countersunk groove, this problem can be effectively solved while maintaining good sealing performance between the movable valve plate 131 and the fixed valve plate.

[0085] Preferably, the cross-section of the movable valve plate connection portion 1313 is arcuate. Due to its unique geometry, the arcuate cross-section exhibits excellent self-locking properties during mating. This shape increases friction during rotation of the rotating shaft 141, preventing slippage or misalignment at the connection. Furthermore, the arcuate cross-section provides a larger contact area between the rotating shaft 141 and the movable valve plate 131. Compared to simple star-shaped or square cross-sections, this more effectively disperses stress, reduces localized stress concentration, and thus enhances the torsional stability of the entire connection.

[0086] 2 and 3 , in this embodiment, a travel space 135 is formed between the movable valve plate connection portion 1313 and the rotating shaft connection portion 1411 ; the movable valve plate connection portion 1313 is provided with at least one drain portion 1314 , and the drain portion 1314 is used to guide the fluid therein to be discharged when the travel space 135 contracts.

[0087] It is understood that due to the relative displacement between the movable valve plate 131 and the rotating shaft 141, a travel space 135 is formed between the inner wall of the movable valve plate connecting portion 1313 and the rotating shaft connecting portion 1411. Furthermore, since the movable valve plate connecting portion 1313 and the rotating shaft connecting portion 1411 are movably connected, fluid may enter the travel space 135. If the fluid in the travel space 135 is not promptly discharged when the travel space 135 contracts, the movable valve plate 131 may not be able to abut against the first fixed valve plate 110 in a timely manner. Therefore, the movable valve plate connecting portion 1313 is provided with at least one drain portion 1314. The drain portion 1314 connects the travel space 135 with the chamber where the movable valve plate 131 is located, thereby guiding the fluid therein to be discharged when the travel space 135 contracts.

[0088] In this embodiment, the drain portion 1314 is constructed as a hole or groove that is parallel to and connected to the movable valve plate connecting portion 1313. When processing the movable valve plate connecting portion 1313, only a groove or hole needs to be cut on its inner wall, which is convenient for processing.

[0089] Referring to Figures 2 and 4, in this embodiment, in order to avoid the problem that the movable valve plate 131 cannot abut against the first fixed valve plate 110 in time, the depth of the movable valve plate connecting portion 1313 is not less than the maximum length of the rotating shaft connecting portion 1411 entering the movable valve plate connecting portion 1313.

[0090] If the movable valve plate connection portion 1313 is a blind hole, the depth of the movable valve plate connection portion 1313 is the hole depth of the blind hole; if the movable valve plate connection portion 1313 is a sunken groove, the depth of the movable valve plate connection portion 1313 is the groove depth of the sunken groove.

[0091] That is to say, when the movable valve plate 131 abuts against the first fixed valve plate 110 , the rotating shaft connecting portion 1411 cannot press against the bottom wall of the movable valve plate connecting portion 1313 , and a certain stroke space 135 still exists.

[0092] By increasing the depth of the movable valve plate connection part 1313, it is ensured that the rotating shaft connection part 1411 has sufficient travel space 135 in the movable valve plate connection part 1313, thereby avoiding the situation where the rotating shaft connection part 1411 hits the bottom wall of the movable valve plate connection part 1313 and cannot completely rest against the fixed valve plate.

[0093] This embodiment further provides a two-piece movable valve plate 131 structure. See FIG6 , which is a schematic cross-sectional view of the two-piece movable valve plate 131 provided in one embodiment of the present invention.

[0094] Specifically, the movable valve plate 131 includes a first sub-valve plate 132 and a second sub-valve plate 133. The first sub-valve plate 132 is closer to the first fixed valve plate 110 than the second sub-valve plate 133. The first sub-valve plate 132 and the second sub-valve plate 133 rotate synchronously around the first axis S1. The movable valve plate connecting portion 1313 is provided on the side of the first sub-valve plate 132 close to the first fixed valve plate 110.

[0095] The first sub-valve plate 132 and the second sub-valve plate 133 are stacked together to form the movable valve plate 131, and they rotate synchronously about the first axis S1. Because the first sub-valve plate 132 is closer to the first fixed valve plate 110 than the second sub-valve plate 133, the first sub-valve plate 132 is provided with a movable valve plate connection portion 1313, which drives the first sub-valve plate 132 to rotate via the rotation axis 141. A synchronous rotation structure is also provided between the first sub-valve plate 132 and the second sub-valve plate 133, which drives the second sub-valve plate 133 to rotate, thereby enabling the rotation axis 141 to drive the entire movable valve plate 131 to rotate.

[0096] This application provides four implementations of the first fixed valve plate 110 and the second sub-valve plate 133 , which are described in detail below.

[0097] In the first implementation, referring to FIG8 , there is shown a schematic cross-sectional structure diagram of a two-piece movable valve plate 131 according to another embodiment of the present invention.

[0098] The movable valve plate 131 further includes at least one movable valve plate locating pin 152, which is arranged along the circumference of the movable valve plate 131 and between the first sub-valve plate 132 and the second sub-valve plate 133 to define the relative position of the first sub-valve plate 132 and the second sub-valve plate 133. The movable valve plate locating pin 152 accurately defines the relative position of the first sub-valve plate 132 and the second sub-valve plate 133, ensuring that the first sub-valve plate 132 and the second sub-valve plate 133 can rotate synchronously.

[0099] In a second implementation, referring to Figures 6 and 7 , an inwardly recessed first guide portion 1331 is provided on a side of the second sub-valve plate 133 close to the first sub-valve plate 132. The first sub-valve plate 132 is provided with a first protrusion 1321 that cooperates with the first guide portion 1331. The first guide portion 1331 has a non-circular cross-sectional shape to define the relative position of the first sub-valve plate 132 and the second sub-valve plate 133.

[0100] Alternatively, a second guide portion recessed inwardly is provided on one side of the first sub-valve plate 132 close to the second sub-valve plate 133, and the second sub-valve plate 133 is provided with a second protrusion engaged with the second guide portion, and the second guide portion has a non-circular cross-sectional shape to limit the relative position of the first sub-valve plate 132 and the second sub-valve plate 133.

[0101] Compared with the previous implementation, the relative position between the first sub-valve plate 132 and the second sub-valve plate 133 no longer depends on the separately arranged movable valve plate positioning pin 152, but is achieved through the cooperation of the first guide portion 1331 and the first protrusion 1321, or the second guide portion and the second protrusion, and the mutual limitation is achieved through the non-circular cross-sectional shape of the two.

[0102] In a third implementation, referring to Figures 9 and 10, at least one first limiting protrusion 1324 extending toward the second sub-valve plate 133 is provided on the first sub-valve plate 132, and the second sub-valve plate 133 is provided with a first limiting recess 1333 that cooperates with each of the first limiting protrusions 1324; or, at least one second limiting protrusion extending toward the first sub-valve plate 132 is provided on the second sub-valve plate 133, and the first sub-valve plate 132 is provided with a second limiting recess that cooperates with each of the second limiting protrusions to limit the relative position of the first sub-valve plate 132 and the second sub-valve plate 133.

[0103] Compared with the second implementation method, by setting multiple first limiting protrusions 1324 or second limiting protrusions, the shape and position of the limiting protrusions are no longer restricted. At the same time, the limiting protrusions can be integrally formed with the first sub-valve plate 132 or the second sub-valve plate 133, and their dimensional accuracy is higher, so that the limiting accuracy of the first sub-valve plate 132 and the second sub-valve plate 133 is more accurate.

[0104] Furthermore, the first limiting protrusion 1324 and the second limiting protrusion are fan-shaped protrusion structures, and the long arc surface of the fan-shaped protrusion intersects or overlaps with the outer peripheral surface of the first sub-valve plate 132 or the outer peripheral surface of the second sub-valve plate 133, and the projection on the first fixed valve plate 110 or the second fixed valve plate 120.

[0105] By arranging multiple limiting structures on the circumference of the first sub-valve plate 132 and the second sub-valve plate 133, the fixing strength during synchronous rotation is enhanced. At the same time, the limiting protrusions of the fan-shaped boss structure fit into the outer periphery of the first sub-valve plate 132 and the second sub-valve plate 133, making it convenient for the first sub-valve plate 132 and the second sub-valve plate 133 to rotate together in the chamber.

[0106] In this embodiment, the valve device 100 also includes a return spring 151 arranged between the first sub-valve plate 132 and the second sub-valve plate 133, and the return spring 151 is used to generate a force to press the first sub-valve plate 132 against the first fixed valve plate 110, and / or a force to press the second sub-valve plate 133 against the second fixed valve plate 120.

[0107] The function of the return spring 151 is to overcome the fluid pressure within a preset range, thereby pressing the first sub-valve plate 132 against the first fixed valve plate 110, and / or pressing the second sub-valve plate 133 against the second fixed valve plate 120. The fluid pressure within the preset range may be 0.1 MPa, 0.2 MPa, 0.3 MPa, 0.5 MPa, 1 MPa, 2 MPa, 3 MPa, 5 MPa, 10 MPa, etc., and the fluid pressure within the preset range is not limited herein.

[0108] The elastic force of the selected return spring 151 varies depending on the fluid pressure within a preset range. On the one hand, the return spring 151 can balance and offset the effects of the fluid pressure within a certain range through its own elastic deformation, thereby reducing the pressure difference between the moving member 130 and the flow channel opening, making the operation of the moving member 130 smoother and more stable. On the other hand, the return spring 151 can maintain the fluid pressure below a certain range, that is, when there is no fluid impacting the movable valve plate 131, by pressing the first sub-valve plate 132 against the first fixed valve plate 110 and the second sub-valve plate 133 against the second fixed valve plate 120.

[0109] Similarly, when the moving part 130 is a single-acting valve plate 131 , a return spring 151 may also be provided, which will not be described in detail here.

[0110] Referring to Figures 11 and 12, in this embodiment, the first fixed valve plate 110 includes at least one positioning protrusion 148, and the positioning protrusion 148 extends from the body of the first fixed valve plate 110 in the direction of the driving assembly 140; the driving assembly 140 also includes a limiting rod 145 fixedly connected to the rotating shaft 141, and the limiting rod 145 is driven to rotate by the rotating shaft 141, and the rotation plane of the limiting rod 145 intersects with the positioning protrusion 148.

[0111] The rotation plane of the limiting rod 145 refers to the plane formed when the limiting rod 145 rotates about the axis. The intersection of the rotation plane of the limiting rod 145 and the positioning protrusion 148 on the first fixed valve plate 110 means that when the limiting rod 145 rotates, it can contact or interact with the positioning protrusion 148, thereby controlling the position of the valve plate.

[0112] The interaction between the limiting rod 145 and the positioning protrusion 148 allows for precise control of the valve plate position. This maintains consistency between the expected and actual values ​​of the movable valve 1 even during extended use, further improving the precision of the flow channel opening and closing control, enabling accurate temperature regulation when used in thermal management systems.

[0113] As shown in FIG. 13 , in some embodiments, the locating projection 148 may be replaced by a separate locating rod.

[0114] Specifically, the valve device 100 also includes at least one positioning rod, and a positioning hole corresponding to the positioning rod is provided on the side of the first fixed valve plate 110 away from the movable valve plate 131 for fixing the positioning rod; the driving assembly 140 also includes a limiting rod 145 fixedly connected to the rotating shaft 141, and the limiting rod 145 is driven to rotate by the rotating shaft 141, and the rotation plane of the limiting rod 145 intersects with the positioning rod.

[0115] The function of the positioning rod is the same as that of the positioning protrusion 148, and will not be repeated here.

[0116] Referring to Figure 14, in this embodiment, the drive assembly 140 also includes a bearing seat 147, and a positioning groove 1471 matching the end shape of the positioning protrusion 148 is provided on the side of the bearing seat 147 close to the first fixed valve plate 110 to accommodate the end of the positioning protrusion 148.

[0117] As the connection between the drive assembly 140 and the valve body, the bearing seat 147 provides support, ensuring that the first fixed valve plate 110 can be stably installed in the valve body. A groove is provided on the side of the bearing seat 147 near the first fixed valve plate 110. The shape of this groove matches the shape of the end of the positioning protrusion 148 on the first fixed valve plate 110, allowing the end of the positioning protrusion 148 to precisely fit into the groove. By fitting the positioning protrusion 148 into the groove, the correct position of the first fixed valve plate 110 in the valve body can be ensured. This also improves the structural strength of the positioning protrusion 148.

[0118] In addition, an embodiment of the present invention further provides a vehicle thermal management system, in which the valve device 100 described above is provided.

[0119] 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.

[0120] 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 first flow channel opening and a second flow channel opening disposed apart from each other, wherein a fluid path is formed between the first flow channel opening and the second flow channel opening, characterized in that: The valve device further comprises: A moving part, which is located between the first flow channel opening and the second flow channel opening, and can be driven to move between the first flow channel opening and the second flow channel opening to at least partially close the first flow channel opening and open the second flow channel opening, or to at least partially close the second flow channel opening and open the first flow channel opening; and the moving part can also be driven to rotate around a first axis to adjust the size of the opening formed when the moving part at least partially closes the corresponding flow channel opening by changing the rotation angle of the moving part.

2. The valve device according to claim 1, characterized in that The first flow channel opening and the second flow channel opening are arranged at a distance from each other in a straight line direction; When the moving member moves to the first position in the linear direction, the moving member at least partially closes the first flow channel opening and opens the second flow channel opening, and the open cross-sectional area of the second flow channel opening is larger than the open cross-sectional area of the first flow channel opening; When the moving member moves to the second position in the linear direction, the second flow channel opening is at least partially closed and the first flow channel opening is opened, and the open cross-sectional area of the first flow channel opening is larger than the open cross-sectional area of the second flow channel opening.

3. The valve device according to claim 2, characterized in that The first flow channel opening and the second flow channel opening are respectively formed on the first surface and the second surface inside the valve device; the moving part includes a first end face and a second end face relative to each other, and when the moving part is in the first position, the first end face abuts against the first surface, and when the moving part is in the second position, the second end face abuts against the second surface, and the first end face, the second end face, the first surface and the second surface are all planes and any two of them are parallel to each other.

4. The valve device according to claim 3, characterized in that The moving part is provided with a communication portion to allow fluid to pass through the moving part; when the moving part abuts against the first surface, the projection of the communication portion on the first surface at least partially overlaps with the first flow channel opening, and the overlapping area is the open cross-sectional area of the first flow channel opening; when the moving part abuts against the second surface, the projection of the communication portion on the second surface at least partially overlaps with the second flow channel opening, and the overlapping area is the open cross-sectional area of the second flow channel opening.

5. The valve device according to claim 4, characterized in that The valve device further comprises: a first fixed valve plate, wherein the first flow channel opening is provided on the first fixed valve plate, and the first surface is an end surface of the first fixed valve plate; a second fixed valve plate, wherein the second flow channel opening is provided on the second fixed valve plate, and the second surface is an end surface of the second fixed valve plate; A movable valve plate, the movable valve plate is located between the first fixed valve plate and the second fixed valve plate, the moving part is formed by the movable valve plate, and the movable valve plate is driven to move along the straight line direction toward the first fixed valve plate or the second fixed valve plate under the pressure of the fluid to abut against the first surface or the second surface.

6. The valve device according to claim 5, characterized in that The valve device further includes: a drive assembly, the drive assembly including a rotating shaft and a drive structure for driving the rotating shaft to rotate, the axis of the rotating shaft coincides with the first axis; The movable valve plate is provided with a movable valve plate connecting portion that is connected to the rotating shaft in cooperation with the movable valve plate connecting portion, the movable valve plate connecting portion is a blind hole or a sunken groove, and the movable valve plate connecting portion has a non-circular cross-sectional shape; The rotating shaft includes a rotating shaft connecting portion that cooperates with the movable valve plate connecting portion. The first fixed valve plate is provided with a rotating shaft through hole for the rotating shaft to pass through. The rotating shaft passes through the rotating shaft through hole to connect with the movable valve plate and drive the movable valve plate to rotate.

7. The valve device according to claim 6, characterized in that The movable valve plate includes a first sub-valve plate and a second sub-valve plate. The first sub-valve plate is closer to the first fixed valve plate than the second sub-valve plate. The first sub-valve plate and the second sub-valve plate rotate synchronously around the first axis. The movable valve plate connecting portion is provided on the side of the first sub-valve plate close to the first fixed valve plate.

8. The valve device according to claim 7, characterized in that A return spring is provided between the first sub-valve plate and the second sub-valve plate, and is used to generate a force to press the first sub-valve plate against the first fixed valve plate and / or a force to press the second sub-valve plate against the second fixed valve plate.

9. The valve device according to claim 6, characterized in that The movable valve plate further comprises at least one movable valve plate positioning pin, wherein the at least one movable valve plate positioning pin is arranged along the circumferential direction of the movable valve plate and is arranged between the first sub-valve plate and the second sub-valve plate to define the relative position of the first sub-valve plate and the second sub-valve plate; Alternatively, a first guide portion recessed inwardly is provided on a side of the second sub-valve plate close to the first sub-valve plate, and the first sub-valve plate is provided with a first protrusion engaged with the first guide portion, and the first guide portion has a non-circular cross-sectional shape; or, a second guide portion recessed inwardly is provided on a side of the first sub-valve plate close to the second sub-valve plate, and the second sub-valve plate is provided with a second protrusion engaged with the second guide portion, and the second guide portion has a non-circular cross-sectional shape, so as to define the relative position of the first sub-valve plate and the second sub-valve plate; Or, the first sub-valve plate is provided with at least one first limiting protrusion extending toward the second sub-valve plate, and the second sub-valve plate is provided with a first limiting recess cooperated with and connected to each of the first limiting protrusions; or, the second sub-valve plate is provided with at least one second limiting protrusion extending toward the first sub-valve plate, and the first sub-valve plate 132 is provided with a second limiting recess cooperated with and connected to each of the second limiting protrusions to limit the relative position of the first sub-valve plate and the second sub-valve plate.

10. The valve device according to claim 6, characterized in that A stroke space is formed between the movable valve plate connecting portion and the rotating shaft connecting portion; the movable valve plate connecting portion is provided with at least one drain portion, which is used to guide the fluid therein to be discharged when the stroke space contracts, and the depth of the movable valve plate connecting portion is not less than the maximum length of the rotating shaft connecting portion entering the movable valve plate connecting portion.

11. The valve device according to claim 6, characterized in that The first fixed valve plate includes at least one positioning protrusion, which extends from the body of the first fixed valve plate toward the direction of the drive assembly; the drive assembly also includes a limiting rod fixedly connected to the rotating shaft, the limiting rod is driven to rotate by the rotating shaft, and the rotation plane of the limiting rod intersects with the positioning protrusion.

12. The valve device according to claim 11, characterized in that The driving assembly further comprises a bearing seat, and a positioning groove matching the shape of the end portion of the positioning protrusion is provided on a side of the bearing seat close to the first fixed valve plate to accommodate the end portion of the positioning protrusion.

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

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