Valve device and thermal management system

Abstract

A valve device (100) and a thermal management system. The valve device (100) comprises a valve seat (170), a first fixed valve plate (110), a second fixed valve plate (120), and a valve plate connecting member (180); the valve seat (170) is provided with a first interface (171) and a second interface (172) which are connected to an external flow path; the first fixed valve plate (110) is provided with a first flow channel port (111) in communication with the first interface (171); the second valve plate (120) is provided with a second flow channel port (121) in communication with the second interface (172); the first fixed valve plate (110) and the second fixed valve plate (120) are both arranged in the valve seat (170) and are spaced apart from each other in a linear direction; a fluid path is formed between the first flow channel port (111) and the second flow channel port (121); and the valve plate connecting member (180) is separately connected to the first fixed valve plate (110) and the second fixed valve plate (120). The valve device (100) can define the relative position of the first fixed valve plate (110) and the second fixed valve plate (120) in the valve seat (170) by means of the valve plate connecting member (180), so as to limit the relative position between the first flow channel port (111) and the second flow channel port (121), improving the flow control precision of the valve device.

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: 202422655047.3 and application date of October 31, 2024, and claims the priority of these two Chinese patent applications, all contents of which are 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 the new energy vehicle industry, vehicle thermal management system technology is also constantly improving. In this context, the electronic expansion valve, as a key component in the thermal management system, plays a vital role.

[0004] Currently, for valve-plate type expansion valves, during their assembly process, the installation accuracy of the valve plates is low, and the relative positions of the flow passage openings cannot be accurately positioned, resulting in low flow control accuracy of the valve device and poor refrigeration efficiency.

[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 locating the relative positions of flow channel openings.

[0007] In a first aspect, an embodiment of the present invention provides a valve device, including a valve seat having a first interface and a second interface connected to an external flow path, and the valve device further includes:

[0008] a first fixed valve plate, wherein the first fixed valve plate is provided with a first flow channel opening, and the first flow channel opening is communicated with the first interface;

[0009] a second fixed valve plate, the second fixed valve plate defining a second flow passage, the second flow passage communicating with the second interface, the first fixed valve plate and the second fixed valve plate both being disposed within the valve seat and spaced apart in a straight line, a fluid path being formed between the first flow passage and the second flow passage;

[0010] A valve plate connecting member is configured to connect the first fixed valve plate and the second fixed valve plate respectively to define a relative position between the first flow channel opening and the second flow channel opening.

[0011] In some optional embodiments, the first flow channel opening and the second flow channel opening are aligned by the valve plate connecting member in the linear direction and in a horizontal direction perpendicular to the linear direction.

[0012] In some optional embodiments, the valve plate connector has an annular structure, and the side of the valve plate connector close to the first fixed valve plate has a shape that matches the outer edge of the first fixed valve plate, and the side of the valve plate connector close to the second fixed valve plate has a shape that matches the outer edge of the second fixed valve plate; the valve plate connector and the first fixed valve plate and the second fixed valve plate are fixedly connected by a positioning member to limit the relative position between the first flow channel opening and the second flow channel opening.

[0013] In some optional embodiments, the positioning member and the valve plate connecting member are integrally formed;

[0014] Alternatively, the positioning member is integrally formed with the first fixed valve plate and the second fixed valve plate;

[0015] Alternatively, the positioning piece on one side of the valve plate connecting piece is integrally formed with the first fixed valve plate or the second fixed valve plate, and the positioning piece on the other side is integrally formed with the valve plate connecting piece.

[0016] In some optional embodiments, the outer edge of the first fixed valve plate connected to the valve plate connecting member has a first step portion for mounting the valve plate connecting member, and a positioning member for positioning the first fixed valve plate and the valve plate connecting member is fixed on the first step portion;

[0017] The outer edge of the second fixed valve plate connected to the valve plate connector has a second step portion for installing the valve plate connector, and a positioning member for positioning the second fixed valve plate and the valve plate connector is fixed on the second step portion.

[0018] In some optional embodiments, the valve plate connecting member is a valve plate positioning pin, the first fixed valve plate is provided with a first valve plate positioning hole, the second fixed valve plate is provided with a second valve plate positioning hole, and both ends of the valve plate positioning pin are connected to the first valve plate positioning hole and the second valve plate positioning hole respectively;

[0019] The first fixed valve plate and the second fixed valve plate are disposed in the cavity of the valve seat and, constrained by the valve seat and the valve plate positioning pins, jointly define the relative position between the first flow channel opening and the second flow channel opening;

[0020] Alternatively, the valve device also includes a reduction gear box seat installed in the valve seat, and the first fixed valve plate and the second fixed valve plate are arranged in the chamber of the reduction gear box seat, and under the constraints of the reduction gear box seat and the positioning member, jointly limit the relative position between the first flow channel opening and the second flow channel opening.

[0021] In some optional embodiments, the first fixed valve plate, the second fixed valve plate and the valve plate connector are integrally formed. The projected shapes of the first fixed valve plate, the second fixed valve plate and the valve plate connector on the first projection plane are generally in a "C" shape, and the first projection plane is a plane parallel to the linear direction.

[0022] In some optional embodiments, the first fixed valve plate and / or the second fixed valve plate include multiple reinforcing ribs extending generally along their radial directions.

[0023] In some optional embodiments, some of the reinforcing ribs on the first fixed valve plate penetrate through the first fluid passage opening along the radial direction;

[0024] and / or, some of the reinforcing ribs on the second fixed valve plate penetrate through the second fluid passage opening along the radial direction.

[0025] In some optional embodiments, the first fixed valve plate includes:

[0026] An annular side wall that extends in a direction away from the second fixed valve plate of the first fixed valve plate, and a plurality of side wall through holes are provided in the circumferential direction of the annular side wall. The plurality of side wall through holes are used to connect the inner and outer spaces of the annular side wall for fluid to pass through.

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

[0028] Compared with the conventional technology, the present invention has the following beneficial effects: The first fixed valve plate and the second fixed valve plate are connected together through the valve plate connector to define their relative positions within the valve seat, and further limit the relative positions between the first fluid passage opening and the second fluid passage opening, so as to improve the flow control accuracy of the valve device, especially applicable to the thermal management system of new energy vehicles, and enhance the performance and reliability of the entire thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 is a schematic diagram of the overall structure of the valve device provided by an embodiment of the present invention;

[0030] FIG. 2 is a schematic diagram of the internal structure of the valve device provided by an embodiment of the present invention;

[0031] FIG. 3 is a cross-sectional view of the valve device provided by an embodiment of the present invention;

[0032] FIG. 4 is a cross-sectional view of the valve device provided by another embodiment of the present invention;

[0033] FIG. 5 is a cross-sectional view of the valve device provided by another embodiment of the present invention;

[0034] FIG6 is a schematic structural diagram of a first fixed valve plate provided in one embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 100. Valve device; 110. First fixed valve plate; 111. First flow channel opening; 112. First surface; 115. First valve plate positioning hole; 117. First step portion; 118. Reinforcing rib; 119. Annular side wall; 1191. Side wall through hole; 120. Second fixed valve plate; 121. Second flow channel opening; 122. Second surface; 124. Second valve plate positioning hole; 128. Second step portion; 130. Moving part; 131. Moving valve plate; 1311. First end face; 1312. Second end face; 141. Rotating shaft; 143. Reducer seat; 170. Valve seat; 171. First interface; 172. Second interface; 180. Valve plate connector; 181. Valve plate positioning pin; 182. Positioning part; S1. First axis. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] First, the principle of the valve device 100 of the present application is briefly described.

[0040] 1 , an embodiment of the present invention provides a valve device 100, including a first flow channel opening 111 and a second flow channel opening 121. A fluid path is formed between the first flow channel opening 111 and the second flow channel opening 121. The first flow channel opening 111 and the second flow channel opening 121 are arranged linearly apart. The valve device 100 further includes:

[0041] The moving part 130 can be driven to move between the first flow channel opening 111 and the second flow channel opening 121 along the straight line direction 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 opening size of the corresponding flow channel opening closed by the moving part 130 by changing the rotation angle.

[0042] 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.

[0043] 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 rapidly expands to the low-pressure side at the inlet throttling port, causing a gas-liquid change, thereby achieving the purpose of cooling.

[0044] 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.

[0045] The valve device 100 of the present application can realize the function of an expansion valve and solve the problem of two-way flow of fluid, and is particularly suitable for use in the thermal management system of new energy vehicles.

[0046] In summary, in this embodiment, the moving part 130 includes a first end face 1311 and a second end face 1312 relative to each other. When the moving part 130 is in the first position, the first end face 1311 abuts against the first surface 112. When the moving part 130 is in the second position, the second end face 1312 abuts against the second surface 122. 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.

[0047] Because the first and second end faces 1311, 1312 of the moving member 130 are planar and parallel to the first and second surfaces 112, 122, respectively, when the moving member 130 is in different positions, its end faces closely abut against the corresponding surfaces. This parallel and close contact helps to form a better seal, making the moving member 130 more tightly abutted, thereby preventing fluid leakage. Furthermore, the planar and parallel design simplifies the processing and manufacturing of the parts, facilitating subsequent maintenance and replacement.

[0048] In this embodiment, a flow portion is provided on the moving part 130 to provide 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 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 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.

[0049] The flow passage 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 / 122. Furthermore, when the moving member 130 abuts a surface, the size of the opening formed by the flow passage and the corresponding flow passage directly determines the fluid flow rate. By precisely controlling the position of the moving member 130, the overlap area between the flow passage and the flow passage can be adjusted, thereby achieving precise flow regulation and a throttling effect.

[0050] The above is a principle description of the valve device 100 of the present application. In the valve device 100 , how to define the relative position between the first flow channel opening 111 and the second flow channel opening 121 is a technical problem that must be solved to improve the flow control accuracy of the valve device 100 .

[0051] 2 and 3 , FIG. 2 is a schematic diagram of the internal structure of a valve device 100 according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the valve device 100 according to an embodiment of the present invention;

[0052] In this embodiment, the valve device 100 includes:

[0053] A valve seat 170 having a first port 171 and a second port 172 connected to an external flow path;

[0054] A first fixed valve plate 110 , wherein the first fixed valve plate 110 defines a first flow channel 111 , and the first flow channel 111 is in communication with the first interface 171 ;

[0055] A second fixed valve plate 120 is provided with a second flow channel 121, which is in communication with the second interface 172. The first fixed valve plate 110 and the second fixed valve plate 120 are both disposed within the valve seat 170 and are spaced apart in a straight line. A fluid path is formed between the first flow channel 111 and the second flow channel 121.

[0056] The valve plate connector 180 connects the first fixed valve plate 110 and the second fixed valve plate 120 respectively to define the relative position between the first flow channel opening 111 and the second flow channel opening 121 .

[0057] The straight line direction is also the main flow direction of the fluid in the valve seat 170 , and can be understood as the main flow direction of the fluid in the valve device 100 .

[0058] The first flow channel opening 111 and the second flow channel opening 121 are respectively provided on the first fixed valve plate 110 and the second fixed valve plate 120, and the position of the flow channel opening relative to the fixed valve plate on which it is located is fixed. Therefore, it is only necessary to fix the relative position of the first fixed valve plate 110 and the second fixed valve plate 120 to define the relative position between the first flow channel opening 111 and the second flow channel opening 121. In this embodiment, the first fixed valve plate 110 and the second fixed valve plate 120 are connected together by the valve plate connector 180, thereby defining the relative position therebetween, and further defining the relative position between the first flow channel opening 111 and the second flow channel opening 121.

[0059] Once the relative position between the first flow channel opening 111 and the second flow channel opening 121 is known, the rotation of the moving part 130 can be accurately controlled to adjust the corresponding throttle opening size.

[0060] In this embodiment, the moving member 130 is a moving valve plate 131 .

[0061] Specifically, the valve device 100 also includes a movable valve plate 131, which 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. Under the pressure of the fluid, the movable valve plate 131 moves along the straight line direction 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.

[0062] The opposite end surfaces of the first fixed valve plate 110 and the second fixed valve plate 120 serve as the first surface 112 and the second surface 122 , respectively.

[0063] The movable valve plate 131 is located between the first fixed valve plate 110 and the second fixed valve plate 120, and forms the moving member 130. The movable valve plate 131 can move in a straight line under the pressure of the fluid, toward the first fixed valve plate 110 or the second fixed valve plate 120, so as to abut against the first surface 112 or the second surface 122, so that the movable valve plate 131 can automatically adjust its position according to changes in fluid pressure to achieve flow direction regulation.

[0064] In this embodiment, four structures of valve plate connectors 180 connecting the first fixed valve plate 110 and the second fixed valve plate 120 are provided, all of which can meet the requirement of defining the relative position between the first flow channel opening 111 and the second flow channel opening 121 .

[0065] In a first implementation, referring to FIG. 2 and FIG. 3 , the first flow channel opening 111 and the second flow channel opening 121 are aligned in the linear direction and in a horizontal direction perpendicular to the linear direction by the valve plate connector 180 .

[0066] The first fixed valve plate 110 and the second fixed valve plate 120 are completely kept aligned in the linear direction and the horizontal direction by the separate valve plate connector 180 .

[0067] Specifically, the valve plate connector 180 has an annular structure, and the side of the valve plate connector 180 close to the first fixed valve plate 110 has a shape that matches the outer edge of the first fixed valve plate 110, and the side of the valve plate connector 180 close to the second fixed valve plate 120 has a shape that matches the outer edge of the second fixed valve plate 120; the valve plate connector 180 and the first fixed valve plate 110 and the second fixed valve plate 120 are fixedly connected by a positioning member 182 to limit the relative position between the first flow channel opening 111 and the second flow channel opening 121.

[0068] The valve plate connector 180 has a shape that matches the outer edge of the first fixed valve plate 110 on the side close to the first fixed valve plate 110, and also has a shape that matches the outer edge of the second fixed valve plate 120 on the side close to the second fixed valve plate 120, ensuring the close combination and accurate positioning of the valve plate connector 180 and the first fixed valve plate 110 and the second fixed valve plate 120, and the fixed connection of the positioning member 182 ensures the accurate positional relationship between the valve plate connector 180 and the two fixed valve plates, and the two cooperate to achieve accurate fixation of the first fixed valve plate 110 and the second fixed valve plate 120.

[0069] As an example, the side of the valve plate connector 180 near the first fixed valve plate 110 is designed as a groove, and the shape of this groove (e.g., a circular inner edge) completely matches the outer edge shape of the first fixed valve plate 110. The valve plate connector 180 is fixedly connected to the two fixed valve plates by a positioning member 182 (such as a pin, a clip, a block, etc.), ensuring that the valve plates do not undergo relative displacement during operation. When the valve plate connector 180 is in contact with and fixed to the first fixed valve plate 110, the sealing and precise alignment between the two can be ensured. Similarly, when the valve plate connector 180 is in contact with and fixed to the second fixed valve plate 120, the sealing and precise alignment between the two can be ensured, thereby accurately defining the relative position between the first flow channel opening 111 and the second flow channel opening 121.

[0070] In this embodiment, the positioning member 182 is integrally formed with the valve plate connecting member 180;

[0071] Alternatively, the positioning member 182 is integrally formed with the first fixed valve plate 110 and the second fixed valve plate 120 ;

[0072] Alternatively, the positioning member 182 on one side of the valve plate connector 180 is integrally formed with the first fixed valve plate 110 or the second fixed valve plate 120 , and the positioning member 182 on the other side is integrally formed with the valve plate connector 180 .

[0073] There are many ways to combine the positioning member 182 and the valve plate connector 180. The one-piece positioning member 182 can provide higher structural stability, while reducing the number of assembly steps and required components, simplifying the production and installation process.

[0074] In a preferred embodiment, the outer edge of the first fixed valve plate 110 connected to the valve plate connecting member 180 has a first step portion 117 for mounting the valve plate connecting member 180, and a positioning member 182 for positioning the first fixed valve plate 110 and the valve plate connecting member 180 is fixed on the first step portion 117;

[0075] The outer edge of the second fixed valve plate 120 connected to the valve plate connector 180 has a second step portion 128 for installing the valve plate connector 180 , and a positioning member 182 for positioning the second fixed valve plate 120 and the valve plate connector 180 is fixed on the second step portion 128 .

[0076] Specific steps are provided at the outer edges of the first fixed valve plate 110 and the second fixed valve plate 120. These steps provide a raised portion for mounting the valve plate connector 180. The valve plate connector 180 can be precisely mounted at predetermined positions on the first fixed valve plate 110 and the second fixed valve plate 120 by cooperating with the steps.

[0077] The fixed position of the positioning member 182 is also set on the step portion. When the first fixed valve plate 110, the second fixed valve plate 120 and the valve plate connector 180 are fixed, the positioning member 182 is embedded in the first fixed valve plate 110, the second fixed valve plate 120 or the valve plate connector 180 to ensure the fixation and positioning between the valve plate connector 180 and the valve plate.

[0078] The precise design of the step portion can ensure that the relative position between the valve plate connector 180 and the valve plate is more accurate, reducing assembly errors, simplifying the assembly process, and reducing the time required for assembly.

[0079] In a second implementation, the relative position between the first flow channel opening 111 and the second flow channel opening 121 is defined by the valve seat 170 and the valve plate positioning pin 181 or the reduction gear box seat 143 and the valve plate positioning pin 181 .

[0080] Specifically, the valve plate connector 180 is a valve plate positioning pin 181. The first fixed valve plate 110 is provided with a first valve plate positioning hole 115, and the second fixed valve plate 120 is provided with a second valve plate positioning hole 124. The two ends of the valve plate positioning pin 181 are respectively connected to the first valve plate positioning hole 115 and the second valve plate positioning hole 124.

[0081] The first fixed valve plate 110 and the second fixed valve plate 120 are disposed in the cavity of the valve seat 170 and, constrained by the valve seat 170 and the valve plate positioning pin 181, jointly define the relative position between the first flow channel opening 111 and the second flow channel opening 121;

[0082] Alternatively, the valve device 100 also includes a reduction gear box seat 143 installed in the valve seat 170, and the first fixed valve plate 110 and the second fixed valve plate 120 are arranged in the chamber of the reduction gear box seat 143, and under the constraints of the reduction gear box seat 143 and the positioning member 182, jointly limit the relative position between the first flow channel opening 111 and the second flow channel opening 121.

[0083] Referring to FIG. 4 , FIG. 4 is a cross-sectional view of a valve device 100 provided in accordance with another embodiment of the present invention.

[0084] When using the valve plate positioning pin 181 to limit the first fixed valve plate 110 and the second fixed valve plate 120, first determine the installation position of the first fixed valve plate 110, install the first fixed valve plate 110 into the reduction gearbox seat 143, then install the fixed valve plate positioning pin 181, align the valve plate positioning pin 181 with the first valve plate positioning hole 115 on the first fixed valve plate 110, and finally install the second fixed valve plate 120. The second fixed valve plate 120 is provided with a second valve plate positioning hole 124. After aligning it with the fixed valve plate positioning pin 181, install it. Thus, under the combined action of the reduction gearbox seat 143 and the valve plate positioning pin 181, the relative positions of the first fluid port 111 and the second fluid port 121 are fixed. After that, the valve plate positioning pin 181 remains in the valve device 100. Therefore, the installation position of the valve plate positioning pin 181 needs to avoid the rotation range of the moving valve plate 131.

[0085] Similarly, when there is no need for the reduction gearbox seat 143, the fixed valve plate can also be directly installed in the valve seat 170. The specific installation steps are not elaborated here.

[0086] In the third implementation method, the first fixed valve plate 110 and the second fixed valve plate 120 are directly integrally formed.

[0087] Specifically, the first fixed valve plate 110, the second fixed valve plate 120, and the valve plate connecting member 180 are integrally formed. The projected shapes of the first fixed valve plate 110, the second fixed valve plate 120, and the valve plate connecting member 180 on the first projection plane are generally in an "L" shape. The first projection plane is a plane parallel to the straight line direction.

[0088] Compared with the second implementation method, in the third implementation method, the fixed valve plate is integrally formed. Refer to FIG. 5. FIG. 5 is a cross-sectional view of the valve device 100 provided by another embodiment of the present invention. During the assembly process of the valve device 100, after installing the fixed valve plate, the moving valve plate 131, and the rotating shaft 141 first, then install them as a whole into the valve device 100. The installation is relatively simple. And because the fixed valve plate is integrally formed, the positioning accuracy between the first fluid port 111 and the second fluid port 121 is high.

[0089] In the fourth implementation method, the first fixed valve plate 110 and the second fixed valve plate 120 are circumferentially limited by a non-circular cross-section, and the first fixed valve plate 110 and the second fixed valve plate 120 are linearly limited by a separate valve plate connecting member 180, or a stepped portion on the inner wall of the valve seat 170, or a stepped portion on the inner wall of the reduction gearbox seat 143.

[0090] Specifically, the first fixed valve plate 110 and the second fixed valve plate 120 are arranged in the cavity of the valve seat 170, the cavity of the valve seat 170 has a non-circular cross-section, and the first fixed valve plate 110 and the second fixed valve plate 120 have outer edges that match the cavity of the valve seat 170; or, the valve device 100 also includes a reduction gear box seat 143 installed in the valve seat 170, the first fixed valve plate 110 and the second fixed valve plate 120 are arranged in the cavity of the reduction gear box seat 143, the cavity of the reduction gear box seat 143 has a non-circular cross-section, and the first fixed valve plate 110 and the second fixed valve plate 120 have outer edges that match the cavity of the reduction gear box seat 143.

[0091] In which, the valve plate connector 180 is arranged between the first fixed valve plate 110 and the second fixed valve plate 120 to separate the first fixed valve plate 110 and the second fixed valve plate 120 in the straight line direction; or, the cross-sectional dimensions of the first fixed valve plate 110 and the second fixed valve plate 120 are different, and the projection of the installation plane of the first fixed valve plate 110 in the straight line direction is set at a distance from the projection of the installation plane of the second fixed valve plate 120 in the straight line direction.

[0092] The mounting plane refers to the plane where the corresponding fixed valve plate is mounted within the reduction gearbox seat 143 or valve seat 170. The projection of the mounting plane in a linear direction is a point or line segment. The first fixed valve plate 110 and the second fixed valve plate 120 have different cross-sectional dimensions. The projections of the mounting plane of the first fixed valve plate 110 and the mounting plane of the second fixed valve plate 120 in a linear direction are spaced apart. This means that the inner wall of the reduction gearbox seat 143 or the inner wall of the valve seat 170 is tapered, or that a mounting portion is provided at the mounting location of the corresponding fixed valve plate, thereby creating a certain distance between the two in a linear direction.

[0093] The valve plate connectors 180 provided in the four embodiments described above are all capable of connecting the first fixed valve plate 110 and the second fixed valve plate 120 and satisfying the requirement of defining the relative position between the first flow channel opening 111 and the second flow channel opening 121. In addition, some other structures obtained by making simple modifications based on the above structures can also meet the requirements and will not be described in detail here.

[0094] In this embodiment, in order to prevent the first and second fixed valve plates 110 and 120 from being deformed due to long-term working pressure, a reinforcement structure of the first and second fixed valve plates 110 and 120 is provided.

[0095] Specifically, the first fixed valve plate 110 and / or the second fixed valve plate 120 includes a plurality of reinforcing ribs 118 extending substantially along the radial direction thereof.

[0096] The reinforcing rib 118 is arranged on a side of the fixed valve plate away from the movable valve plate 131 .

[0097] Referring to FIG. 6 , FIG. 6 is a schematic structural diagram of a first fixed valve plate 110 provided in one embodiment of the present invention.

[0098] A plurality of reinforcing ribs 118 are provided on the side of the first fixed valve plate 110 away from the movable valve plate 131. These ribs 118 extend generally radially along the valve plate. The use of the ribs 118 improves the structural stability of the valve plate and reduces deformation caused by pressure during long-term operation. The ribs 118 also help maintain the flatness of the contact surface between the fixed valve plate and the movable valve plate 131, which plays an important role in the seal between the fixed valve plate and the movable valve plate 131.

[0099] In this embodiment, part of the reinforcing rib 118 on the first fixed valve plate 110 radially penetrates the first flow channel opening 111;

[0100] And / or, part of the reinforcing ribs 118 on the second fixed valve plate 120 penetrates the second flow channel opening 121 in the radial direction.

[0101] The reinforcing rib 118 runs through the flow channel, significantly improving the pressure resistance of the flow channel, preventing deformation or damage to the flow channel caused by stress concentration caused by the passage of high-pressure fluid. Moreover, because the reinforcing rib 118 can withstand more stress, it helps to extend the service life of the fixed valve plate.

[0102] The cross-section of the reinforcement rib 118, which extends through the flow channel, is generally diamond-shaped, with its two opposite vertices facing the forward and reverse directions of the flow channel, respectively. In other words, the reinforcement rib 118 at the flow channel opening also serves as a fluid guide. As is well known, a diamond-shaped cross-section provides greater bending and torsional resistance than a circular or rectangular cross-section, thereby more effectively enhancing the structural strength of the flow channel opening. Furthermore, the diamond-shaped arrangement allows the reinforcement rib 118 to guide the fluid flow more smoothly at the flow channel opening, reducing the formation of turbulence or eddies.

[0103] Continuing to refer to Figure 6, in this embodiment, the first fixed valve plate 110 includes: an annular side wall 119, which extends in the direction of the first fixed valve plate 110 away from the second fixed valve plate 120, and the annular side wall 119 is circumferentially provided with a plurality of side wall through holes 1191, and the plurality of side wall through holes 1191 are used to connect the inner and outer spaces of the annular side wall 119 for fluid to pass through.

[0104] The annular sidewall structure provides additional strength and stability for the first fixed valve plate 110. A plurality of circular sidewall through-holes 1191 are evenly distributed around the annular sidewall 119, allowing fluid to flow from any position in the outer space of the annular sidewall 119 into the inner space, or vice versa, achieving fluid connectivity and smooth flow.

[0105] 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.

[0106] 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.

[0107] 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 seat having a first interface and a second interface connected to an external flow path, characterized in that: The valve device further comprises: a first fixed valve plate, wherein the first fixed valve plate is provided with a first flow channel opening, and the first flow channel opening is communicated with the first interface; a second fixed valve plate, the second fixed valve plate defining a second flow passage, the second flow passage communicating with the second interface, the first fixed valve plate and the second fixed valve plate both being disposed within the valve seat and spaced apart in a straight line, a fluid path being formed between the first flow passage and the second flow passage; A valve plate connecting member is configured to connect the first fixed valve plate and the second fixed valve plate respectively to define a relative position between the first flow channel opening and the second flow channel opening.

2. The valve device according to claim 1, characterized in that The first flow channel opening and the second flow channel opening are aligned in the linear direction and in a horizontal direction perpendicular to the linear direction by the valve plate connecting member.

3. The valve device according to claim 2, characterized in that The valve plate connecting piece has an annular structure, and the side of the valve plate connecting piece close to the first fixed valve plate has a shape that matches the outer edge of the first fixed valve plate, and the side of the valve plate connecting piece close to the second fixed valve plate has a shape that matches the outer edge of the second fixed valve plate; the valve plate connecting piece and the first fixed valve plate and the second fixed valve plate are fixedly connected by a positioning piece to limit the relative position between the first flow channel opening and the second flow channel opening.

4. The valve device according to claim 3, characterized in that The positioning member and the valve plate connecting member are integrally formed; Alternatively, the positioning member is integrally formed with the first fixed valve plate and the second fixed valve plate; Alternatively, the positioning piece on one side of the valve plate connecting piece is integrally formed with the first fixed valve plate or the second fixed valve plate, and the positioning piece on the other side is integrally formed with the valve plate connecting piece.

5. The valve device according to claim 3, characterized in that The outer edge of the first fixed valve plate connected to the valve plate connecting member has a first step portion for mounting the valve plate connecting member, and a positioning member for positioning the first fixed valve plate and the valve plate connecting member is fixed on the first step portion; The outer edge of the second fixed valve plate connected to the valve plate connector has a second step portion for installing the valve plate connector, and a positioning member for positioning the second fixed valve plate and the valve plate connector is fixed on the second step portion.

6. The valve device according to claim 1, characterized in that The valve plate connecting member is a valve plate positioning pin. The first fixed valve plate is provided with a first valve plate positioning hole, the second fixed valve plate is provided with a second valve plate positioning hole, and the two ends of the valve plate positioning pin are respectively connected to the first valve plate positioning hole and the second valve plate positioning hole; The first fixed valve plate and the second fixed valve plate are disposed in the cavity of the valve seat and, constrained by the valve seat and the valve plate positioning pins, jointly define the relative position between the first flow channel opening and the second flow channel opening; Alternatively, the valve device also includes a reduction gear box seat installed in the valve seat, and the first fixed valve plate and the second fixed valve plate are arranged in the chamber of the reduction gear box seat, and under the constraints of the reduction gear box seat and the positioning member, jointly limit the relative position between the first flow channel opening and the second flow channel opening.

7. The valve device according to claim 1, characterized in that The first fixed valve plate, the second fixed valve plate and the valve plate connecting member are integrally formed. The projected shapes of the first fixed valve plate, the second fixed valve plate and the valve plate connecting member on the first projection plane are generally in an "L" shape. The first projection plane is a plane parallel to the straight line direction.

8. The valve device according to claim 1, wherein The first fixed valve plate and the second fixed valve plate are arranged in the chamber of the valve seat. The chamber of the valve seat has a non-circular cross-section. The first fixed valve plate and the second fixed valve plate have outer edges matching the chamber of the valve seat; or, the valve device further includes a reduction gearbox seat installed in the valve seat. The first fixed valve plate and the second fixed valve plate are arranged in the chamber of the reduction gearbox seat. The chamber of the reduction gearbox seat has a non-circular cross-section. The first fixed valve plate and the second fixed valve plate have outer edges matching the chamber of the reduction gearbox seat; Wherein, the valve plate connecting member is arranged between the first fixed valve plate and the second fixed valve plate to separate the first fixed valve plate and the second fixed valve plate in the straight line direction; or, the cross-sectional dimensions of the first fixed valve plate and the second fixed valve plate are different, and the projection of the installation plane of the first fixed valve plate in the straight line direction is spaced from the projection of the installation plane of the second fixed valve plate in the straight line direction.

9. The valve device according to claim 1, characterized in that The first fixed valve plate and / or the second fixed valve plate includes a plurality of reinforcing ribs extending generally along its radial direction.

10. The valve device according to claim 9, characterized in that Some of the reinforcing ribs on the first fixed valve plate penetrate the first flow port along the radial direction; And / or, some of the reinforcing ribs on the second fixed valve plate penetrate the second flow port along the radial direction.

11. The valve device according to claim 1, wherein The first fixed valve plate includes: A ring-shaped side wall, the ring-shaped side wall extends along the direction in which the first fixed valve plate is away from the second fixed valve plate, and a plurality of side wall through holes are formed in the circumferential direction of the ring-shaped side wall. The plurality of side wall through holes are used to connect the inner space and the outer space of the ring-shaped side wall for fluid to pass through.

12. A thermal management system, characterized in that: The valve device according to any one of claims 1 to 11 is included.

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