Electric valve and thermal management system

Abstract

The utility model provides an electrically operated valve and a thermal management system. The electric valve comprises a valve body and an actuator arranged on the upper portion of the valve body. The actuator comprises an actuator, a first duplicate gear, a second duplicate gear, an output gear and a circuit board. Wherein the output gear is located in the center of the upper top of the valve body, the upper gear of the first duplicate gear, the upper gear of the second duplicate gear and the actuator are installed in the actuator in a non-center mode, and the transverse area of the whole second shell is reduced as much as possible; the projection area, arranged on the valve body, of the actuator is completely contained in the outline of the valve body, torque output is increased, the problem that when the actuator is installed on the valve body, the occupied projection area is large is solved, and therefore integration and miniaturization of the electric valve are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicles, and in particular to an electric valve and thermal management system. Background Technology

[0002] The subsystems of the thermal management system for new energy vehicles are developing towards integration. Fluid control devices for each system need to be integrated into a single module, and reducing the installation area of ​​various components facilitates this integration. However, due to the structural limitations of its internal transmission components, the actuator of a traditional electronic water valve extends beyond the valve body's contours when installed, resulting in low integration and a relatively large footprint. Therefore, it is necessary to provide an electric valve that overcomes these shortcomings. Utility Model Content

[0003] The purpose of this invention is to provide an electric valve and a thermal management system.

[0004] According to one aspect of the present invention, an electric valve is provided, comprising: a first housing having a plurality of flow channel cavities therein; a first cover being disposed on top of the first housing, the first cover and the first cover forming a valve cavity; a valve core being disposed within the valve cavity and rotatable along the valve cavity to achieve communication and / or isolation between different flow channel cavities; a second housing being disposed on the first cover, the second housing and the first cover forming a first cavity; a second cover being disposed on the second housing, the second cover and the second housing forming a second cavity; and an actuator. The actuator is placed in the second cavity, and its output end is connected to the worm gear; a first double gear is placed in the second cavity, and its upper gear meshes with the worm gear; a second double gear is placed in the second cavity, and its upper gear meshes with the lower gear of the first double gear, while the lower gear of the second double gear is placed in the first cavity; an output gear is placed in the first cavity, and its output gear is connected to the valve core and rotates synchronously, meshing with the lower gear of the second double gear.

[0005] Preferably, it further includes: a circuit board disposed in the second cavity, the circuit board being located below the actuator and at a predetermined gap from the upper surface of the second housing.

[0006] Preferably, a Hall angle sensor is provided on the lower surface of the circuit board, and a signal magnet matching the Hall angle sensor is embedded in the valve core end.

[0007] Preferably, the actuator has a fixing plate on its side, and the circuit board has a clamping part that is engaged with the fixing plate.

[0008] Preferably, the number of teeth on the upper gear of the first double gear is greater than the number of teeth on the lower gear of the first double gear, the number of teeth on the upper gear of the second double gear is greater than the number of teeth on the lower gear of the first double gear, and the number of teeth on the upper gear of the second double gear is greater than the number of teeth on the lower gear of the second double gear.

[0009] Preferably, the second housing is provided with a through hole, and the lower half shaft of the upper gear and the lower gear of the second double gear are of equal diameter and pass through the through hole.

[0010] Preferably, the second housing is further provided with a mounting platform, which is concentrically arranged with the through hole. A slot is provided on the inner surface of the mounting platform near the upper surface of the second housing. A sealing ring is provided on the slot and the second housing. The upper half shaft of the second double gear is mounted on the sealing ring and the mounting platform.

[0011] Preferably, a first fastening part is provided in the middle of the first cover, and a second fastening part is provided below the second housing. The first fastening part and the second fastening part are in transition fit. The first cover has a plurality of mounting holes, and the second housing is fixedly mounted on the mounting holes by bolts.

[0012] Preferably, the outer wall of the first fastening part is provided with an outwardly protruding annular limiting part, and the annular limiting part is in transition fit with the inner wall of the second fastening part; the inner wall of the second fastening part has a plurality of inwardly protruding connecting parts evenly and alternately distributed, and the connecting parts are in transition fit with the outer wall of the first fastening part, forming a drainage channel between two adjacent connecting parts.

[0013] According to another aspect of the present invention, a thermal management system is provided, including the aforementioned electric valve.

[0014] Compared with the prior art, the electric valve and thermal management system provided by this utility model have the following beneficial effects: By adopting a non-centrally arranged gear transmission system, this utility model reduces the lateral area of ​​the actuator, so that the projected area of ​​the actuator arranged on the valve body is completely contained within the valve body contour, increasing torque output and solving the problem of the large projected area occupied by the actuator when it is installed on the valve body, thereby facilitating the integration and miniaturization of the entire electric valve. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the electric valve in this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the electric valve in this utility model. Figure 2 ;

[0018] Figure 3 This is a cross-sectional schematic diagram of the electric valve in this utility model;

[0019] Figure 4 This is an exploded view of the actuator in this utility model;

[0020] Figure 5 This is a schematic diagram of the actuator power transmission structure in this utility model;

[0021] Figure 6 This is a top view of the actuator (with the second cover hidden) in this utility model;

[0022] Figure 7 The mounting structure for the second double gear in this utility model (i.e., the attachment) Figure 6 (Schematic diagram of section AA in the diagram).

[0023] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. First housing; 111. Flow channel cavity; 12. Valve core; 121. Signal magnet; 13. First cover; 131. First fastening part; 1311. Connecting part; 1312. Drainage channel; 132. Mounting hole; 14. Bolt; 2. Actuator; 21. Second housing; 211. Through hole; 212. Mounting platform; 213. Second fastening part; 2131. Annular limiting part; 214. Sealing ring; 2 15. Slot; 22. First cavity; 23. Second cover; 24. Second cavity; 25. Actuator; 251. Worm gear; 252. Fixing plate; 26. First double gear; 26a. Upper gear; 26b. Lower gear; 27. Second double gear; 27a. Upper gear; 27b. Lower gear; 27c. Upper half shaft; 27d. Lower half shaft; 28. Output gear; 29. ​​Circuit board; 291. Hall angle sensor; 292. Clamping part. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0026] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0030] See appendix Figures 1 to 7 This embodiment provides an electric valve, mainly used in the thermal management system of new energy vehicles to manage the fluids of various systems. The electric valve includes a valve body 1 and an actuator 2 located on the upper part of the valve body 1.

[0031] See appendix Figure 1 , 2 The valve body 1 includes a first housing 11, a first cover 13, and a valve core 12. The first housing 11 has multiple flow channel cavities 111. The first cover 13 is placed on top of the first housing 11. The first cover 13 and the first cover 13 form a valve cavity. The valve core 12 is placed in the valve cavity and can rotate along the valve cavity to realize the communication and / or isolation between different flow channel cavities 111.

[0032] For those skilled in the art, the structure of valve body 1 can be implemented in various ways. This embodiment provides an exemplary structure of valve body 1. The first housing 11 is a cylindrical structure. A partition plate is provided at the bottom of the first housing 11, dividing the internal space of the first housing 11 into four flow channel cavities 111. The four flow channel cavities 111 are respectively connected to four fluid pipes. The valve core 12 is in sealing contact with the inner wall of the first housing 11. The valve core 12 can rotate along the inside of the first housing 11, so that any flow channel cavity 111 is connected to an adjacent flow channel cavity 111, while being isolated from another adjacent flow channel cavity 111, thereby realizing the switching between two flow modes.

[0033] See appendix Figure 3 The actuator 2 includes a second housing 21 and a second cover 23. The second housing 21 is placed on the first cover 13. A first fastening part 131 is provided in the middle of the first cover 13, and a second fastening part 213 is provided below the second housing 21. The first fastening part 131 and the second fastening part 213 are transitionally fitted, forming a first cavity 22 between the second housing 21 and the first cover 13. The second cover 23 is placed on the second housing 21, and the second cover 23 and the second housing 21 form a second cavity 24. The first cover 13 has a plurality of mounting holes 132 distributed thereon. The second housing 21 is fixedly mounted on the mounting holes 132 by bolts 14, thus fixing the second housing 21 to the first cover 13.

[0034] See appendix Figure 4 The outer wall of the first fastening part 131 is provided with an outwardly protruding annular limiting part 2131, and the annular limiting part 2131 and the inner wall of the second fastening part 213 are in a transition fit; the inner wall of the second fastening part 213 is evenly and alternately distributed with a number of inwardly protruding connecting parts 1311, and the connecting parts 1311 and the outer wall of the first fastening part 131 are in a transition fit. A drainage channel 1312 is formed between two adjacent connecting parts 1311. While isolating external impurities, the fluid in the second cavity 24 can be discharged in time along the drainage channel 1312 to ensure the normal operation of the actuator 25 and the circuit board 29.

[0035] See appendix Figure 5The actuator 2 also includes an actuator 25, a first double gear 26, a second double gear 27, an output gear 28, and a circuit board 29. The actuator 25 is a drive device capable of converting other forms of energy into mechanical energy, such as a stepper motor. The actuator 25 is located within the second cavity 24, and its output end is connected to a worm gear 251. The first double gear 26 is located within the second cavity 24, with its upper gear 26a meshing with the worm gear 251. The upper gear 27a of the second double gear 27 is located within the second cavity 24, and its upper gear 27a meshes with the lower gear 26b of the first double gear 26. The lower gear 27b of the second double gear 27 is located within the first cavity 22. The output gear 28 is located within the first cavity 22, connected to the valve core 12 and rotating synchronously. The output gear 28 meshes with the lower gear 27b of the second double gear 27.

[0036] It is worth noting that the output gear 28 is located at the center of the first cover 13. The upper gear 27a of the first double gear 26 and the second double gear 27 and the actuator 25 are mounted on the upper part of the second housing 21 in a non-central manner to minimize the lateral area of ​​the entire second housing 21, so that the projected area of ​​the actuator 25 arranged on the valve body 1 is completely contained within the outline of the valve body 1.

[0037] The upper gear 26a of the first double gear 26 has more teeth than the lower gear 26b of the first double gear 26. The upper gear 27a of the second double gear 27 has more teeth than the lower gear 26b of the first double gear 26, and the upper gear 27a of the second double gear 27 has more teeth than the lower gear 27b of the second double gear 27. The upper gear 26a of the first double gear 26 is located in the same plane as the worm gear 251. The lower gear 27b of the double gear 26 is located in the same plane as the upper gear 27a of the second double gear 27. The lower gear 27b of the second double gear 27 is located in the same plane as the output gear 28. This reduces the installation area of ​​the actuator without sacrificing the torque output of the actuator 25, thus facilitating the integration and miniaturization of the entire electric valve.

[0038] See appendix Figure 6 The circuit board 29 is a PCBA printed circuit board 29. The circuit board 29 is located within the second cavity 24 and shares a mounting structure with the actuator 25. The circuit board 29 is positioned below the actuator 25, facilitating the wiring connection between the actuator 25 and the circuit board 29. Furthermore, the actuator 25 has a fixing plate 252 on its side, and the circuit board 29 has a clamping part 292. The clamping part 292 is engaged with the fixing plate 252, enabling the mounting of the circuit board 29 and the actuator 25.

[0039] In addition, the circuit board 29 is spaced apart from the upper surface of the second housing 21 and the lower surface of the actuator 25 by a predetermined gap to ensure the heat dissipation requirements of the actuator 25 and the circuit board 29.

[0040] A Hall angle sensor 291 is provided on the lower surface of the circuit board 29, and a signal magnet 121 is embedded in the end of the valve core 12. The signal magnet 121 is matched with the Hall angle sensor 291. When the signal magnet 121 moves together with the valve core 12, the Hall angle sensor 291 detects the real position of the valve core 12 in the air, reducing transmission error and improving detection accuracy.

[0041] See appendix Figure 7 The second housing 21 has a through hole 211, and the lower half shaft 27d and the lower gear 27b of the second double gear 27 have the same diameter. The second housing 21 also has a mounting platform 212, which is concentric with the through hole 211. The inner surface of the mounting platform 212 is provided with a groove 215 near the upper surface of the second housing 21. The groove 215 and the second housing 21 are provided with a sealing ring 214. The upper half shaft 27c of the second double gear 27 is mounted on the sealing ring 214 and the mounting platform 212.

[0042] When the second double gear 27 is installed, the lower half shaft 27d and the lower gear 27b of the second double gear 27 are of equal diameter and can pass through the through hole 211. The upper gear 27a and the upper half shaft 27c of the second double gear 27 are mounted on the sealing ring 214 and the mounting table 212 to realize the installation of the second double gear 27. The whole installation process is convenient and simple, and no additional mounting shaft is required.

[0043] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. An electric valve, characterized in that, include: A first housing, wherein the first housing is provided with a plurality of flow channel cavities; A first cover is placed on top of the first housing, and the first cover and the first cover together form a valve cavity; A valve core, which is placed in the valve cavity and can rotate along the valve cavity to realize the connection and / or isolation between different flow channel cavities; A second housing is placed on a first cover, and the second housing and the first cover form a first cavity; A second cover is placed on the second housing, and the second cover and the second housing form a second cavity; An actuator is placed inside the second cavity, and the output end of the actuator is connected to a worm gear. The first double gear is placed in the second cavity, and the upper gear of the first double gear meshes with the worm. The second double gear has its upper gear placed in the second cavity, and its upper gear meshes with the lower gear of the first double gear. The lower gear of the second double gear is placed in the first cavity. An output gear is placed in the first cavity, the output gear is connected to the valve core and rotates synchronously, and the output gear meshes with the lower gear of the second double gear.

2. The electric valve as described in claim 1, characterized in that, Also includes: A circuit board is disposed in the second cavity, and the circuit board is located below the actuator and at a predetermined gap from the upper surface of the second housing.

3. The electric valve as described in claim 2, characterized in that, The lower surface of the circuit board is provided with a Hall angle sensor, and a signal magnet matching the Hall angle sensor is embedded in the valve core end.

4. The electric valve as described in claim 2, characterized in that, The actuator has a fixing plate on its side, and the circuit board has a clamping part that is engaged with the fixing plate.

5. The electric valve as described in claim 1, characterized in that, The number of teeth on the upper gear of the first double gear is greater than the number of teeth on the lower gear of the first double gear, the number of teeth on the upper gear of the second double gear is greater than the number of teeth on the lower gear of the first double gear, and the number of teeth on the upper gear of the second double gear is greater than the number of teeth on the lower gear of the second double gear.

6. The electric valve as described in claim 1, characterized in that, The second housing is provided with a through hole, and the lower half shaft and the lower gear of the second double gear are of the same diameter and pass through the through hole.

7. The electric valve as described in claim 6, characterized in that, The second housing is also provided with a mounting platform, which is concentric with the through hole. The inner surface of the mounting platform is provided with a slot near the upper surface of the second housing. The slot and the second housing are provided with a sealing ring. The upper half shaft of the second double gear is mounted on the sealing ring and the mounting platform.

8. The electric valve as described in claim 1, characterized in that, A first fastening part is provided in the middle of the first cover, and a second fastening part is provided below the second housing. The first fastening part and the second fastening part are in transition fit. The first cover has a plurality of mounting holes, and the second housing is fixedly mounted on the mounting holes by bolts.

9. The electric valve as described in claim 8, characterized in that, The outer wall of the first fastening part is provided with an outwardly protruding annular limiting part, and the annular limiting part is in transition fit with the inner wall of the second fastening part; the inner wall of the second fastening part is evenly and alternately distributed with a number of inwardly protruding connecting parts, and the connecting parts are in transition fit with the outer wall of the first fastening part, and a drainage channel is formed between two adjacent connecting parts.

10. A thermal management system, characterized in that, Includes the electric valve as described in any one of claims 1 to 9.

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