Valve apparatus and thermal management system

Abstract

A valve apparatus and a thermal management system. The valve apparatus (10) comprises a valve body (20) and a valve core assembly (30). The valve body has a plurality of external interfaces (210). The valve core assembly comprises: a first fixed valve plate (311), the first fixed valve plate being provided with a first flow channel opening (3111); a second fixed valve plate (312), the second fixed valve plate being provided with a second flow channel opening (3121), and the first fixed valve plate and the second fixed valve plate being arranged at a distance from each other in a linear direction; and a movable valve member (320), the movable valve member being arranged between the first fixed valve plate and the second fixed valve plate, the movable valve member being capable of being driven to abut against the first fixed valve plate or the second fixed valve plate, and the movable valve member being provided with a flow part. The flow part can be matched with the first flow channel opening to form a first throttling opening, or matched with the second flow channel opening to form a second throttling opening. The movable valve member can also be driven to rotate around a first axis (S1). According to the valve apparatus, by means of cooperation between the flow part of the movable valve member and the first fixed valve plate or the second fixed valve plate, the flow rate of a fluid can be accurately controlled, thereby improving the adjustment precision and response speed of the valve apparatus.

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: 202422655800.9 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] The thermal management system of new energy vehicles is crucial to vehicle performance and safety. As a key component in a thermal management system, the performance of the electronic expansion valve directly affects the efficiency and reliability of the entire thermal management system.

[0004] The tapered needle electronic expansion valve is a widely used expansion valve structure. It controls the stator of a stepper motor to rotate the rotor within the valve body. The rotor, in turn, drives the tapered needle up and down through gears to increase or decrease flow control. However, the up and down movement of the tapered needle electronic expansion valve means the needle has a limited range of motion, limiting its ability to regulate flow. Furthermore, because the rotor's rotation drives the needle's up and down movement, the needle's movement is slow, resulting in a prolonged opening and closing time, making it difficult to meet the demand for rapid response.

[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 that are different from the tapered needle type electronic expansion valve.

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

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

[0009] a second fixed valve plate, the second fixed valve plate being provided with a second flow channel opening, the first fixed valve plate and the second fixed valve plate being arranged apart in a straight line direction, the first flow channel opening and the second flow channel opening being both located on the fluid path;

[0010] A movable valve member is arranged between the first fixed valve plate and the second fixed valve plate, and the movable valve member can be driven to abut against the first fixed valve plate or the second fixed valve plate. The movable valve member is provided with a flow portion for allowing fluid to pass through the movable valve member; the flow portion can cooperate with the first flow channel opening to form a first throttling port, or cooperate with the second flow channel opening to form a second throttling port; the movable valve member can also be driven to rotate around a first axis to adjust the opening size of the first throttling port or the second throttling port by changing the rotation angle.

[0011] In some optional embodiments, the movable valve member includes a first movable valve plate and a second movable valve plate stacked up and down, the first movable valve plate is closer to the first fixed valve plate relative to the second movable valve plate, and a limiting structure is provided between the first movable valve plate and the second movable valve plate to keep the first movable valve plate and the second movable valve plate rotating synchronously around the first axis.

[0012] In some optional embodiments, the circulation portion includes a first circulation groove provided on the first movable valve plate and a second circulation groove provided on the second movable valve plate;

[0013] The first flow groove is provided on a side of the first movable valve plate away from the first fixed valve plate;

[0014] The second flow groove is provided on a side of the second movable valve plate away from the second fixed valve plate;

[0015] The width of the first circulation groove gradually decreases as it approaches the first fixed valve plate. A first through-hole penetrating the first movable valve plate is formed on the bottom wall of the first circulation groove. The first through-hole is in the shape of an elongated slit.

[0016] The width of the second flow groove gradually decreases as it approaches the second fixed valve plate. A second through-hole penetrating the second movable valve plate is formed on the bottom wall of the second flow groove. The second through-hole is in the shape of an elongated slit.

[0017] The fluid leaves the chamber where the movable valve member is located through a first throttle port formed by the cooperation of the first through port and the first flow channel port, or a second throttle port formed by the cooperation of the second through port and the second flow channel port.

[0018] In some optional embodiments, the depth of the first through-hole is less than the groove depth of the first circulation groove, and the first through-hole extends along the rotation direction of the movable valve member; the depth of the second through-hole is less than the groove depth of the second circulation groove, and the second through-hole extends along the rotation direction of the movable valve member.

[0019] In some optional embodiments, the first movable valve plate and the second movable valve plate are generally fan-shaped columnar structures, the first circulation groove has a first side opening, the first side opening is arranged on a side section of the first movable valve plate, and the fluid can enter the first circulation groove through the first side opening; the second circulation groove has a second side opening, the second side opening is arranged on a side section of the second movable valve plate, and the fluid can enter the second circulation groove through the second side opening.

[0020] In some optional embodiments, the circulation portion includes a first circulation groove arranged on the end surface of the movable valve component on the side close to the first fixed valve plate, and a second circulation groove on the end surface of the movable valve component on the side close to the second fixed valve plate, and the first circulation groove and the second circulation groove are both inclined grooves; along the rotation direction of the movable valve component, one side of the inclined groove is open, and cooperates with the first fixed valve plate or the second fixed valve plate to form a circulation groove inlet, and after the fluid enters the inclined groove through the circulation groove inlet, it leaves the chamber where the movable valve component is located from the throttle port corresponding to the inclined groove.

[0021] In some optional embodiments, the first flow channel includes a first channel section and a second channel section connected thereto, the channel width of the first channel section is smaller than the channel width of the second channel section, the channel width of the second channel section gradually increases in a direction away from the first channel section, and the inclination of the first channel section is smaller than the inclination of the second channel section, where the inclination refers to the degree of inclination of the channel bottom wall relative to the horizontal plane;

[0022] The second flow groove includes a third groove segment and a fourth groove segment connected thereto, the groove width of the third groove segment is smaller than the groove width of the fourth groove segment, the groove width of the fourth groove segment gradually increases in a direction away from the third groove segment, and the inclination of the third groove segment is smaller than the inclination of the fourth groove segment.

[0023] In some optional embodiments, the projections of the first circulation groove and the second circulation groove on the first projection plane coincide with each other, the projections of the first flow channel opening and the second flow channel opening on the first projection plane coincide with each other, and the first projection plane is a plane perpendicular to the first axis.

[0024] In some optional embodiments, the circulation portion is a movable valve plate through hole that passes through the movable valve member, and the movable valve plate through hole forms a movable valve plate flow channel for the fluid to flow; the movable valve plate is defined to rotate, so that the direction in which the overlapping area of ​​the projection of the circulation portion on the first fixed valve plate or the second fixed valve plate and its flow channel opening increases is the positive direction of rotation, and the cross-sectional width of the movable valve plate through hole gradually decreases along the positive direction of rotation.

[0025] 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.

[0026] Compared to conventional technologies, the present invention offers the following advantages: The fluid flow rate can be precisely controlled through the coordination of the flow portion of the movable valve member with the first or second fixed valve plate. Furthermore, the movable valve member can rotate about a first axis, and the opening of the corresponding throttle opening is adjusted by varying the rotation angle. This allows the valve assembly to adjust the fluid flow rate as needed, improving both the adjustment accuracy and the response speed of the valve assembly. The rotation and movement of the movable valve member overcomes the limitations of the traditional valve needle's range of motion, enhancing the valve assembly's ability to regulate flow, making it particularly suitable for use in thermal management systems for new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of a valve device provided in one embodiment of the present invention;

[0028] FIG2 is a schematic cross-sectional view of the valve device shown in FIG1 ;

[0029] FIG3 is a schematic structural diagram of a circulation portion provided by an embodiment of the present invention;

[0030] FIG4 is a schematic structural diagram of a circulation portion provided by another embodiment of the present invention;

[0031] FIG5 is a schematic structural diagram of a circulation portion provided by another embodiment of the present invention;

[0032] FIG6 is a schematic cross-sectional view of a valve device according to an embodiment of the present invention;

[0033] FIG7 is a partial enlarged schematic diagram of the movable valve member in FIG6;

[0034] FIG8 is a schematic diagram of an exploded structure of a valve device provided in yet another embodiment of the present invention;

[0035] FIG9 is a schematic cross-sectional view of a valve device according to another embodiment of the present invention;

[0036] FIG10 is a schematic structural diagram of a first movable valve plate and a second movable valve plate provided in one embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 10. Valve assembly; 20. Valve body; 210. External interface; 30. Valve core assembly; 310. Fixed valve member; 311. First fixed valve plate; 3111. First flow channel opening; 312. Second fixed valve plate; 3121. Second flow channel opening; 320. Movable valve member; 323. Protrusion; 324. Guide; 325. Movable valve plate through hole; 326. Movable valve plate through groove; 321. First movable valve plate; 3211. First flow groove; 3212. First through-portion; 32111. First side opening; 32112. First groove section; 32113. Second groove section; 322. Second movable valve plate; 3221, second circulation groove; 3222, second through-port; 32211, second side opening; 330, elastic member; 40, drive assembly; 410, drive device; 420, rotating shaft; 430, reduction gearbox seat; S1, first axis. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 1 and 2 , FIG1 is a schematic structural diagram of a valve device 10 provided in one embodiment of the present invention, and FIG2 is a schematic cross-sectional diagram of the valve device 10 shown in FIG1 ; an embodiment of the present invention provides a valve device 10, comprising a valve body 20 and a valve core assembly 30 disposed within the valve body 20, wherein the valve body 20 has a plurality of external interfaces 210, and a fluid path flowing through the valve core assembly 30 is formed between the plurality of external interfaces 210, and the valve core assembly 30 comprises:

[0042] A first fixed valve plate 311 , wherein the first fixed valve plate 311 is provided with a first flow channel opening 3111 ;

[0043] A second fixed valve plate 312, wherein the second fixed valve plate 312 is provided with a second flow channel opening 3121, the first fixed valve plate 311 and the second fixed valve plate 312 are arranged in a straight line apart from each other, and the first flow channel opening 3111 and the second flow channel opening 3121 are both located on the fluid path;

[0044] The movable valve member 320 is arranged between the first fixed valve plate 311 and the second fixed valve plate 312, and the movable valve member 320 can be driven to abut against the first fixed valve plate 311 or the second fixed valve plate 312. The movable valve member 320 is provided with a flow portion for allowing fluid to pass through the movable valve member 320; the flow portion can cooperate with the first flow channel 3111 to form a first throttling port, or cooperate with the second flow channel 3121 to form a second throttling port; the movable valve member 320 can also be driven to rotate around the first axis S1 to adjust the opening size of the first throttling port or the second throttling port by changing the rotation angle.

[0045] The flow channel is a pre-set channel on the fixed valve plate with a fixed size and shape. The flow passage is a portion of the movable valve element 320 that can be aligned with or offset from the flow channel. When the flow passage is aligned with the flow channel, a corresponding throttle is formed. That is, the flow passage at least partially blocks the flow channel to form the corresponding throttle.

[0046] The position of the movable valve member 320 can be adjusted by an external drive (such as a motor). When the movable valve member 320 is driven to rotate, the alignment between the flow passage and the flow passage changes, thereby changing the opening of the throttle. Increasing the opening of the throttle increases the fluid flow rate; decreasing the opening of the throttle decreases the fluid flow rate. The coordination between the flow passage and the flow passage allows the valve device 10 to dynamically adjust the fluid flow rate under different operating conditions. For example, in a thermal management system, the refrigerant flow rate can be adjusted based on the changing cooling demand of the thermal management system to maintain efficient operation of the thermal management system.

[0047] In this embodiment, the circulation portion includes a first circulation groove 3211 arranged on the end surface of the movable valve component 320 on the side close to the first fixed valve plate 311, and a second circulation groove 3221 on the end surface of the movable valve component 320 on the side close to the second fixed valve plate 312. The first circulation groove 3211 and the second circulation groove 3221 are both inclined grooves; along the rotation direction of the movable valve component 320, one side of the inclined groove is open, and cooperates with the first fixed valve plate 311 or the second fixed valve plate 312 to form a circulation groove inlet. After the fluid enters the inclined groove through the circulation groove inlet, it leaves the chamber where the movable valve component 320 is located from the throttle port corresponding to the inclined groove.

[0048] Referring to Figure 3, Figure 3 is a schematic diagram of the structure of the circulation portion provided by one embodiment of the present invention; the first circulation groove 3211 and the second circulation groove 3221 are both inclined grooves, which means that they have a certain inclination angle along the axis of the movable valve member 320. This inclination angle helps to produce a certain dynamic effect when the fluid passes through, thereby optimizing the flow characteristics of the fluid and controlling the flow rate. One side of the inclined groove is open, and cooperates with the first fixed valve plate 311 or the second fixed valve plate 312 to form a circulation groove inlet, allowing the fluid to enter the circulation groove through the circulation groove inlet, then flow along the inclined direction of the inclined groove, and finally leave the chamber where the movable valve member 320 is located through the throttle port corresponding to the inclined groove.

[0049] In this embodiment, the circulation groove includes a two-section structure. The inclination of the first section of the inclined groove is relatively small, and the dimensional accuracy requirement is relatively high. In order to achieve precise control of the flow rate, the inclination of the first section of the inclined groove is relatively large, which mainly plays the role of guiding the fluid circulation and has a relatively low dimensional accuracy requirement.

[0050] Specifically, referring to FIG3 , the first flow groove 3211 includes a first groove section 32112 and a second groove section 32113 connected thereto. The groove width of the first groove section 32112 is smaller than the groove width of the second groove section 32113. The groove width of the second groove section 32113 gradually increases in a direction away from the first groove section 32112. The inclination of the first groove section 32112 is smaller than the inclination of the second groove section 32113. The inclination refers to the degree of inclination of the groove bottom wall relative to the horizontal plane.

[0051] The second flow groove 3221 includes a third groove section and a fourth groove section connected thereto, the groove width of the third groove section is smaller than the groove width of the fourth groove section, the groove width of the fourth groove section gradually increases in the direction away from the third groove section, and the inclination of the third groove section is smaller than the inclination of the fourth groove section.

[0052] As a result, the fluid experiences varying degrees of resistance as it flows through the circulation groove, enabling precise control of the flow rate. The first groove section 32112 has a narrow groove width and a small inclination, enabling precise control of the throttle opening. The second groove section 32113 gradually increases the size of the flow channel by increasing its inclination and groove width to guide fluid flow. Similarly, the third and fourth inclined groove sections serve the same purpose. By optimizing the shape and size of the circulation groove, pressure loss can be reduced as the fluid passes through the movable valve member 320.

[0053] Furthermore, the projections of the first circulation groove 3211 and the second circulation groove 3221 on the first projection plane coincide with each other, and the projections of the first flow channel opening 3111 and the second flow channel opening 3121 on the first projection plane coincide with each other, and the first projection plane is a plane perpendicular to the first axis S1.

[0054] In other words, the first circulation groove 3211 and the second circulation groove 3221 are spatially mirror-symmetrical, and the first flow channel opening 3111 and the second flow channel opening 3121 are also spatially mirror-symmetrical. Therefore, regardless of whether the movable valve member 320 abuts against the first fixed valve plate 311 or the second fixed valve plate 312, the same control parameters can be used to control the rotation of the movable valve member 320, simplifying the design and operation of the control system. Using the same control parameters means that the control system does not need to design different control logic for different positions of the movable valve member 320 (different abutment objects), which can reduce the complexity of the control system and improve its reliability and ease of maintenance. In addition, the symmetrical design helps to reduce errors in the manufacturing and assembly process because it ensures that the circulation grooves and flow channel openings on both sides have the same size and shape, thereby ensuring the consistency of fluid flow.

[0055] Refer to Figure 4, which is a structural schematic diagram of the circulation portion provided by another embodiment of the present invention. In this embodiment, the circulation portion is a movable valve plate through hole 325 that penetrates the movable valve member 320, and the movable valve plate through hole 325 forms a movable valve plate flow channel for the fluid to flow; the movable valve plate is defined to rotate, so that the direction in which the overlapping area of ​​the projection of the circulation portion on the first fixed valve plate 311 or the second fixed valve plate 312 and its flow channel opening increases is the positive direction of rotation, and the cross-sectional width of the movable valve plate through hole 325 gradually decreases along the positive direction of rotation.

[0056] The movable valve plate through-hole 325 is a variation of the aforementioned flow chute. Fluid can enter the movable valve plate through-hole 325 through the opening on the side of the movable valve plate through-hole 325 that is not in contact with the fixed valve plate, and then be discharged from the throttling port formed by the other opening and the flow passage. The cross-sectional width of the movable valve plate through-hole 325 refers to the width of the cross-section formed by the movable valve plate through-hole 325 and a plane perpendicular to the positive direction of rotation. The cross-sectional width of the movable valve plate through-hole 325 gradually decreases along the positive direction of rotation, allowing for precise control of the fluid flow rate by changing the rotation angle of the movable valve plate. When the movable valve plate rotates, the cross-sectional width of the movable valve plate through-hole 325 decreases, the overlapping area of ​​the flow passage of the movable valve plate through-hole 325 decreases, and the area through which fluid passes decreases, thereby reducing the flow rate. Conversely, when the movable valve plate rotates, the cross-sectional width of the movable valve plate through-hole 325 increases, the overlapping area of ​​the flow passage of the valve plate through-hole increases, and the fluid flow rate increases.

[0057] In this embodiment, the cross-sectional shape of the through hole of the movable valve plate 131 is crescent-shaped.

[0058] Further, refer to Figure 5, which is a structural schematic diagram of the circulation portion provided by another embodiment of the present invention; in this embodiment, the circulation portion is a movable valve plate through groove 326 that penetrates the movable valve member 320, and the movable valve plate through groove 326 forms a movable valve plate flow channel for the fluid to flow; the movable valve plate is defined to rotate, so that the direction in which the overlapping area of ​​the projection of the circulation portion on the first fixed valve plate 311 or the second fixed valve plate 312 and its flow channel opening increases is the positive direction of rotation, and the cross-sectional width of the movable valve plate through groove 326 gradually decreases along the positive direction of rotation.

[0059] It can be understood that the movable valve plate groove 326 is a modified embodiment of the movable valve plate through hole 325. The above-mentioned movable valve plate through hole 325 is opened on one side along the thickness direction of the movable valve plate so that the fluid can enter the movable valve plate through hole 325 from the open side, that is, the movable valve plate groove 326. The specific technical effect is the same as that of the movable valve plate through hole 325 and will not be repeated here.

[0060] In some embodiments, in order to improve the stability of the contact between the movable valve member 320 and the fixed valve plate, a separate movable valve plate is provided for each fixed valve plate, thereby avoiding the situation where a single movable valve member 320 has to choose between two fixed valve plates.

[0061] Specifically, referring to Figures 6 and 7, Figure 6 is a schematic cross-sectional structure diagram of the valve device 10 provided in an embodiment of the present invention, and Figure 7 is a partially enlarged schematic diagram of the movable valve component 320 in Figure 6, wherein the movable valve component 320 includes a first movable valve plate 321 and a second movable valve plate 322 stacked up and down, wherein the first movable valve plate 321 is closer to the first fixed valve plate 311 relative to the second movable valve plate 322, and a limiting structure is provided between the first movable valve plate 321 and the second movable valve plate 322 to keep the first movable valve plate 321 and the second movable valve plate 322 rotating synchronously around the first axis S1.

[0062] The first movable valve plate 123 may also be referred to as a first sub-valve plate, and the second movable valve plate 124 may also be referred to as a second sub-valve plate.

[0063] It will be appreciated that in this embodiment, the movable valve member 320 shown in FIG. 3 is split into two along its midpoint, resulting in a first movable valve plate 321 and a second movable valve plate 322. A position limiting structure is provided between the first movable valve plate 321 and the second movable valve plate 322 to circumferentially limit the relative position of the first movable valve plate 321 and the second movable valve plate 322, thereby achieving synchronous rotation. Because each fixed valve plate has a corresponding movable valve plate, the problem of abutment failure that may occur when a single movable valve plate switches between the first fixed valve plate 311 and the second fixed valve plate 312 is reduced.

[0064] 8-10 , FIG8 is a schematic diagram of an exploded structure of a valve device 10 according to another embodiment of the present invention, FIG9 is a schematic diagram of a cross-sectional structure of a valve device 10 according to another embodiment of the present invention, and FIG10 is a schematic diagram of the structure of a first movable valve plate 321 and a second movable valve plate 322 according to an embodiment of the present invention; the circulation portion includes a first circulation groove 3211 provided on the first movable valve plate 321 and a second circulation groove 3221 provided on the second movable valve plate 322;

[0065] The first flow groove 3211 is provided on a side of the first movable valve plate 321 away from the first fixed valve plate 311;

[0066] The second flow groove 3221 is provided on a side of the second movable valve plate 322 away from the second fixed valve plate 312 ;

[0067] The width of the first circulation groove 3211 gradually decreases as it approaches the first fixed valve plate 311 . A first through-hole 3212 penetrating the first movable valve plate 321 is formed on the bottom wall of the first circulation groove 3211 . The first through-hole 3212 is in the shape of an elongated slit.

[0068] The width of the second circulation groove 3221 gradually decreases as it approaches the second fixed valve plate 312. A second through-hole 3222 penetrating the second movable valve plate 322 is defined on the bottom wall of the second circulation groove 3221. The second through-hole 3222 is in the shape of an elongated slit.

[0069] The fluid leaves the chamber where the movable valve member 320 is located through a first throttle port formed by the first through port 3212 and the first flow channel port 3111 , or a second throttle port formed by the second through port 3222 and the second flow channel port 3121 .

[0070] The width of the circulation grooves (first circulation groove 3211 and second circulation groove 3221) gradually decreases as they approach the fixed valve plate, forming a V-shaped cross-section. This helps guide fluid flow toward the through-ports, allowing fluid to flow more smoothly through the circulation grooves, reducing turbulence and pressure loss, thereby improving fluid flow efficiency. First and second through-ports 3212 and 3222 are correspondingly disposed at the bottoms of the first and second circulation grooves 3211 and 3221. Both the first and second through-ports 3212 and 3222 are slit-shaped to provide a precise throttling effect, enabling more precise control of fluid flow. The slit-shaped through-ports (first and second through-ports 3212 and 3222) enable better flow regulation and pressure drop control in terms of fluid dynamics. The slit-shaped through-ports facilitate coordination with the flow channel opening to achieve the function of a throttling port. Furthermore, precise control of fluid flow can be achieved by adjusting the width and / or length of the through-ports.

[0071] The first circulation groove 3211 is arranged on the side of the first movable valve plate 321 away from the first fixed valve plate 311, and the second circulation groove 3221 is arranged on the side of the second movable valve plate 322 away from the second fixed valve plate 312. This means that the fluid enters the circulation groove from between the first movable valve plate 321 and the second movable valve plate 322, which can more centrally control the flow direction of the fluid and improve the control accuracy of the valve. From the perspective of force, after the fluid enters the circulation groove, it can generate pressure on the first movable valve plate 321 or the second movable valve plate 322, and assist in pressing the first movable valve plate 321 or the second movable valve plate 322 onto the corresponding fixed valve plate, which helps to form a seal at the throttle position and improves the sealing performance.

[0072] In this embodiment, in order to ensure that the opening (throttle opening) formed by the through-opening and the flow channel opening can accurately control the flow rate, the width of the through-opening should be kept consistent.

[0073] Specifically, the widths of the first through-holes 3212 are all equal in the rotation direction of the movable valve member 320 , and the widths of the second through-holes 3222 are all equal in the rotation direction of the movable valve member 320 .

[0074] In this embodiment, the depth of the first through-hole 3212 is less than the groove depth of the first circulation groove 3211, and the first through-hole 3212 extends along the rotation direction of the movable valve component 320; the depth of the second through-hole 3222 is less than the groove depth of the second circulation groove 3221, and the second through-hole 3222 extends along the rotation direction of the movable valve component 320.

[0075] The depth of the through-ports is smaller than that of the circulation grooves to reduce fluid pressure loss. During actual manufacturing, while ensuring structural strength, the depths of the first through-ports 3212 and second through-ports 3222 are minimized to minimize fluid pressure loss. The first through-ports 3212 and second through-ports 3222 extend along the direction of rotation, maintaining continuity and stability when the fluid enters and exits the circulation grooves. This reduces fluid dynamics disturbances, thereby lowering pressure loss and providing varying flow rate adjustment ranges at different rotation angles.

[0076] In this embodiment, the first movable valve plate 321 and the second movable valve plate 322 are generally fan-shaped columnar structures, and the first circulation groove 3211 has a first side opening 32111, which is arranged on a side section of the first movable valve plate 321, and the fluid can enter the first circulation groove 3211 through the first side opening 32111; the second circulation groove 3221 has a second side opening 32211, which is arranged on a side section of the second movable valve plate 322, and the fluid can enter the second circulation groove 3221 through the second side opening 32211.

[0077] The first and second movable valve plates 321 and 322 generally have a fan-shaped columnar structure, with side openings provided for the first and second flow slots 3211 and 3221, respectively. Fluid can enter the flow slots directly through the side openings provided on the side sections of the movable valve plates. This direct entry method reduces fluid disturbance, provides a smoother fluid transition, and thus reduces energy loss. The fan-shaped columnar structure of the movable valve plates also provides greater structural stability and strength, making the valve more reliable when handling high-pressure fluids.

[0078] Furthermore, the projections of the first circulation groove 3211 and the second circulation groove 3221 on the first projection plane coincide with each other, the projections of the first through-port 3212 and the second through-port 3222 on the first projection plane coincide with each other, the projections of the first flow channel opening 3111 and the second flow channel opening 3121 on the first projection plane coincide with each other, and the first projection plane is a plane perpendicular to the first axis S1.

[0079] That is to say, the first circulation groove 3211 and the second circulation groove 3221 are mirror-symmetrical in space, the first through-port 3212 and the second through-port 3222 are mirror-symmetrical in space, and the first flow channel opening 3111 and the second flow channel opening 3121 are also mirror-symmetrical in space. The technical effect of such a setting is the same as the above-mentioned symmetrical setting effect, and will not be repeated here.

[0080] Furthermore, an elastic member 330 , such as a spring, a rubber pad, etc., is provided between the first movable valve plate 321 and the second movable valve plate 322 to enhance the stability of the abutment between the movable valve plate and the fixed valve plate.

[0081] It can be understood that the elastic member 330 can apply an elastic force to the first movable valve plate 321 to move toward the first fixed valve plate 311, and apply an elastic force to the second movable valve plate 322 to move toward the second fixed valve plate 312. When the fluid enters the valve core assembly 30, the elastic member 330 buffers the impact force on the movable valve plate on the fluid entry side, thereby avoiding the abutment failure problem caused by the movable valve plate on the other side being impacted and rebounding.

[0082] In addition, an embodiment of the present invention further provides a vehicle thermal management system, in which the valve device 10 described above is provided.

[0083] 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.

[0084] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve device comprising a valve body and a valve core assembly disposed in the valve body, wherein the valve body has a plurality of external interfaces, and a fluid path flowing through the valve core assembly is formed between the plurality of external interfaces, characterized in that: The valve core assembly includes: a first fixed valve plate, wherein the first fixed valve plate is provided with a first flow channel opening; a second fixed valve plate, the second fixed valve plate being provided with a second flow channel opening, the first fixed valve plate and the second fixed valve plate being arranged apart in a straight line direction, the first flow channel opening and the second flow channel opening being both located on the fluid path; A movable valve member is arranged between the first fixed valve plate and the second fixed valve plate, and the movable valve member can be driven to abut against the first fixed valve plate or the second fixed valve plate. The movable valve member is provided with a flow portion for allowing fluid to pass through the movable valve member; the flow portion can cooperate with the first flow channel opening to form a first throttling port, or cooperate with the second flow channel opening to form a second throttling port; the movable valve member can also be driven to rotate around a first axis to adjust the opening size of the first throttling port or the second throttling port by changing the rotation angle.

2. The valve device according to claim 1, characterized in that The movable valve member includes a first movable valve plate and a second movable valve plate stacked up and down. The first movable valve plate is closer to the first fixed valve plate than the second movable valve plate. A limiting structure is provided between the first movable valve plate and the second movable valve plate to keep the first movable valve plate and the second movable valve plate rotating synchronously around the first axis.

3. The valve device according to claim 2, characterized in that The circulation portion includes a first circulation groove provided on the first movable valve plate and a second circulation groove provided on the second movable valve plate; The first flow groove is provided on a side of the first movable valve plate away from the first fixed valve plate; The second flow groove is provided on a side of the second movable valve plate away from the second fixed valve plate; The width of the first circulation groove gradually decreases as it approaches the first fixed valve plate. A first through-hole penetrating the first movable valve plate is formed on the bottom wall of the first circulation groove. The first through-hole is in the shape of an elongated slit. The width of the second flow groove gradually decreases as it approaches the second fixed valve plate. A second through-hole penetrating the second movable valve plate is formed on the bottom wall of the second flow groove. The second through-hole is in the shape of an elongated slit. The fluid leaves the chamber where the movable valve member is located through a first throttle port formed by the cooperation of the first through port and the first flow channel port, or a second throttle port formed by the cooperation of the second through port and the second flow channel port.

4. The valve device according to claim 3, characterized in that The depth of the first through-hole is less than the groove depth of the first circulation groove, and the first through-hole extends along the rotation direction of the movable valve member; the depth of the second through-hole is less than the groove depth of the second circulation groove, and the second through-hole extends along the rotation direction of the movable valve member.

5. The valve device according to claim 4, characterized in that The first movable valve plate and the second movable valve plate are generally fan-shaped columnar structures, the first circulation groove has a first side opening, the first side opening is arranged on a side section of the first movable valve plate, and the fluid can enter the first circulation groove through the first side opening; the second circulation groove has a second side opening, the second side opening is arranged on a side section of the second movable valve plate, and the fluid can enter the second circulation groove through the second side opening.

6. The valve device according to claim 1 or 2, characterized in that The circulation portion includes a first circulation groove provided on an end surface of the movable valve member close to the first fixed valve plate, and a second circulation groove provided on an end surface of the movable valve member close to the second fixed valve plate, wherein both the first circulation groove and the second circulation groove are inclined grooves; Along the rotation direction of the movable valve member, one side of the inclined groove is open and cooperates with the first fixed valve plate or the second fixed valve plate to form a flow groove inlet. After the fluid enters the inclined groove through the flow groove inlet, it leaves the chamber where the movable valve member is located from the throttle port corresponding to the inclined groove.

7. The valve device according to claim 6, characterized in that The first flow channel includes a first channel section and a second channel section connected thereto, the channel width of the first channel section is smaller than the channel width of the second channel section, the channel width of the second channel section gradually increases in a direction away from the first channel section, and the inclination of the first channel section is smaller than the inclination of the second channel section, where the inclination refers to the degree of inclination of the channel bottom wall relative to the horizontal plane; The second flow groove includes a third groove segment and a fourth groove segment connected thereto, the groove width of the third groove segment is smaller than the groove width of the fourth groove segment, the groove width of the fourth groove segment gradually increases in a direction away from the third groove segment, and the inclination of the third groove segment is smaller than the inclination of the fourth groove segment.

8. The valve device according to any one of claims 3 to 7, characterized in that: The projections of the first circulation groove and the second circulation groove on the first projection plane coincide with each other, and the projections of the first flow channel opening and the second flow channel opening on the first projection plane coincide with each other. The first projection plane is a plane perpendicular to the first axis.

9. The valve device according to claim 1 or 2, characterized in that: The circulation portion is a through hole of the movable valve plate that passes through the movable valve member, and the through hole of the movable valve plate forms a movable valve plate flow channel for the flow of the fluid; the movable valve plate is defined to rotate, and the direction in which the overlapping area of the projection of the circulation portion on the first fixed valve plate or the second fixed valve plate and its flow channel opening increases is defined as the positive direction of rotation, and the cross-sectional width of the through hole of the movable valve plate gradually decreases along the positive direction of rotation.

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

Images