Electronic expansion valve, thermal management system comprising same, and vehicle

Abstract

An electronic expansion valve (1), a thermal management system comprising same, and a vehicle. The electronic expansion valve (1) comprises: a valve seat assembly (10), the valve seat assembly (10) being provided with a valve port (12); a valve needle assembly (20), the valve needle assembly (20) being reciprocatingly movably arranged in the valve seat assembly (10) so as to open or close the valve port (12); a conversion member (30), the conversion member (30) working in conjunction with the valve needle assembly (20) for converting the rotation of the conversion member (30) into reciprocating movement of the valve needle assembly (20); and a rotor assembly (52), the rotor assembly (52) and the conversion member (30) each having at least one plane abutting against each other, such that the rotor assembly (52) drives the conversion member (30) to rotate.

Description

Electronic expansion valve, thermal management system and vehicle having same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 2023111300456 and application date August 31, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the technical field of electronic expansion valves, and in particular to an electronic expansion valve and a thermal management system and a vehicle having the electronic expansion valve. Background Art

[0004] The valve needle assembly in the electronic expansion valve in the related art may leak liquid when blocking the valve port.

[0005] Application Contents

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an electronic expansion valve, in which a movable subassembly drives a conversion member to rotate, and the rotation of the conversion member is converted into a reciprocating movement of a valve needle assembly. Then, the entire valve needle assembly only reciprocates along its axial direction. In this way, when the valve needle assembly blocks the valve port, the valve needle assembly does not rotate relative to the valve port and rubs, thereby reducing the wear of the valve needle assembly and the possibility of leakage. In addition, the movable subassembly and the conversion member are matched by a flat stop between the movable subassembly and the conversion member. The structure is simple and the installation is convenient, which helps to reduce the complexity of the electronic expansion valve structure and reduce the production cost of the electronic expansion valve.

[0007] The present application also provides a thermal management system and a vehicle having the electronic expansion valve.

[0008] According to the electronic expansion valve of the embodiment of the first aspect of the present application, it includes: a valve seat assembly, which is provided with a valve port; a valve needle assembly, which is reciprocatingly arranged on the valve seat assembly to open or close the valve port; a conversion member, which cooperates with the valve needle assembly to convert the rotation of the conversion member into reciprocating movement of the valve needle assembly; and a mover assembly, which is sleeved on the conversion member, and the mover assembly and the conversion member have at least one plane abutting each other, so that the mover assembly drives the conversion member to rotate.

[0009] According to the electronic expansion valve of the embodiment of the present application, the planar stop between the movable subassembly and the conversion part is utilized to enable the movable subassembly to drive the conversion part to rotate, so that when the valve needle assembly blocks the valve port, the valve needle assembly will not rotate and rub relative to the valve port, so as to reduce the wear of the valve needle assembly and reduce the possibility of leakage. In addition, the planar stop between the movable subassembly and the conversion part is utilized to achieve the coordination between the movable subassembly and the conversion part, which has a simple structure and is easy to install, thereby reducing the complexity of the electronic expansion valve structure and reducing the production cost of the electronic expansion valve.

[0010] In addition, the electronic expansion valve according to the above embodiment of the present application may also have the following additional technical features:

[0011] According to some embodiments of the present application, the outer peripheral wall of the conversion member includes a plurality of first stop planes spaced apart along the circumferential direction, and the plurality of first stop planes respectively abut against the mover assembly.

[0012] According to some embodiments of the present application, the inner circumferential wall of the mover assembly includes a plurality of second stop planes spaced apart along the circumferential direction, and the plurality of second stop planes respectively abut against the plurality of first stop planes.

[0013] According to some embodiments of the present application, the conversion member is provided with a support portion, and the support portion supports the first end surface of the mover assembly facing the valve port.

[0014] According to some optional embodiments of the present application, the inner peripheral wall of the mover assembly is provided with a plurality of spaced-apart stop members, and the plurality of stop members respectively abut against the support portion.

[0015] According to some embodiments of the present application, the end of the conversion member facing away from the valve port extends out of the movable subassembly, and the electronic expansion valve further includes a stopper, which is fixed to the end of the conversion member and stops at the second end face of the movable subassembly facing away from the valve port.

[0016] According to some embodiments of the present application, the electronic expansion valve further includes: a rotation stopper, which is mounted to the valve seat assembly, and the rotation stopper cooperates with a mating portion of the valve needle assembly to limit the rotational freedom of the valve needle assembly.

[0017] According to some optional embodiments of the present application, the anti-rotation member is located on a side of the conversion member facing the valve port.

[0018] According to some optional embodiments of the present application, the cross-section of the outer peripheral wall of the matching portion along the radial direction of the valve needle assembly is formed into a non-circular shape, the detent is externally disposed on the matching portion and the detent is in contact with the matching portion.

[0019] According to some optional embodiments of the present application, the mating portion is adapted to abut against the conversion member to limit the movement of the valve needle assembly.

[0020] According to some embodiments of the present application, the valve needle assembly includes: a valve stem, which cooperates with the conversion part so that the rotation of the conversion part is converted into reciprocating movement of the valve stem; a valve needle, which is used to open or close the valve port, and the valve needle and the valve stem cooperate to be driven to move by the valve stem; an elastic part, which is respectively connected to the valve stem and the valve needle, and when the valve needle closes the valve port, the valve stem can move toward the valve port to compress the elastic part to form a preload.

[0021] In some embodiments, the valve needle is provided with an accommodating cavity, the elastic member is installed in the accommodating cavity, the valve stem extends into the accommodating cavity, and the elastic member abuts against the valve stem and the inner bottom wall of the accommodating cavity.

[0022] In some examples, a pressing sleeve is provided at one end of the accommodating cavity facing the valve stem, and the end of the valve stem extending into the accommodating cavity is adapted to abut against the pressing sleeve.

[0023] According to an embodiment of a second aspect of the present application, a thermal management system is provided. The thermal management system includes the electronic expansion valve according to the embodiment of the first aspect of the present application.

[0024] According to the thermal management system of the embodiment of the present application, by utilizing the electronic expansion valve described in the embodiment of the first aspect of the present application, the coordination of the movable subassembly and the conversion part is achieved by utilizing the planar stop between the movable subassembly and the conversion part. The structure is simple and the installation is convenient, which facilitates reducing the complexity of the electronic expansion valve structure and reducing the production cost of the electronic expansion valve.

[0025] According to an embodiment of a third aspect of the present application, a vehicle is provided, comprising the thermal management system according to the embodiment of the second aspect of the present application.

[0026] According to the vehicle of the embodiment of the present application, the electronic thermal management system described in the embodiment of the second aspect of the present application is utilized, and the planar stop between the movable subassembly and the conversion part is utilized to achieve the coordination between the movable subassembly and the conversion part. The structure is simple and the installation is convenient, which facilitates reducing the complexity of the electronic expansion valve structure and reducing the production cost of the electronic expansion valve.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] FIG1 is a cross-sectional view of an electronic expansion valve according to an embodiment of the present application;

[0030] FIG2 is a schematic structural diagram of a valve needle assembly according to an embodiment of the present application;

[0031] FIG3 is a cross-sectional view of a valve needle assembly according to an embodiment of the present application;

[0032] FIG4 is a schematic structural diagram of a rotation-stopping member according to an embodiment of the present application;

[0033] FIG5 is a schematic structural diagram of a mover assembly according to an embodiment of the present application;

[0034] FIG6 is a schematic structural diagram of a conversion member according to an embodiment of the present application;

[0035] FIG7 is a schematic structural diagram of a vehicle and a thermal management system according to an embodiment of the present application.

[0036] Figure numerals: electronic expansion valve 1, valve seat assembly 10, valve seat 101, valve cover 102, mounting cavity 11, valve port 12, valve needle assembly 20, valve stem 21, mating portion 211, second limiting surface 212, valve needle 22, accommodating cavity 221, pressing sleeve 222, elastic member 23, annular groove 24, conversion member 30, support portion 31, mounting groove 32, first stop plane 33, stop member 40, first limit surface 41, mover assembly 52, first end face 521, second end face 522, stop member 523, second stop plane 524, stop member 61, vehicle 91, thermal management system 92. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "vertical", "width", "thickness", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0041] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature therebetween. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0042] The electronic expansion valve 1 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0043] As shown in FIG. 1 to FIG. 6 , the electronic expansion valve 1 according to an embodiment of the present application includes a valve seat assembly 10 , a valve needle assembly 20 , a conversion member 30 and a mover assembly 52 .

[0044] The valve seat assembly 10 is provided with a valve port 12, and the valve needle assembly 20 is reciprocatingly arranged in the valve seat assembly 10. The conversion member 30 cooperates with the valve needle assembly 20 to convert the rotation of the conversion member 30 into the reciprocating movement of the valve needle assembly 20. When the conversion member 30 rotates, the conversion member 30 can drive the valve needle assembly 20 to move reciprocatingly, so that the valve needle assembly 20 can open or close the valve port 12.

[0045] The movable component 52 is sleeved on the conversion part 30, and the movable component 52 and the conversion part 30 have at least one plane abutting each other, so that the movable component 52 drives the conversion part 30 to rotate, and the plane stop between the movable component 52 and the conversion part 30 is used to realize the cooperation between the movable component 52 and the conversion part 30. Then, when the movable component 52 rotates, there is a force between the planes of the movable component 52 and the conversion part 30 abutting each other, so as to drive the conversion part 30 to rotate.

[0046] Specifically, when the movable assembly 52 is sleeved on the conversion member 30, the inner peripheral wall of the movable assembly 52 has at least one plane, and the outer peripheral wall of the conversion member 30 has at least one plane. These two planes are stopped and matched, so that when the movable assembly 52 rotates, the conversion member 30 is driven to rotate by the stopping force between the planes.

[0047] This method utilizes the planar stop between the movable subassembly 52 and the conversion member 30 to realize the movable subassembly 52 driving the conversion member 30 to rotate, so that the valve needle assembly 10 does not rotate around its axial direction, but only reciprocates along its axial direction. In this way, when the valve needle assembly 10 blocks the valve port 12, the valve needle assembly 10 will not rotate and rub against the valve port 12, thereby reducing the wear of the valve needle assembly 12 and reducing the possibility of leakage. In addition, the method of transmission cooperation between the movable subassembly 52 and the conversion member 30 is relatively simple, and no additional parts are required to realize the connection between the movable subassembly 52 and the conversion member 30, nor is there a need for complex processing technology to realize the connection between the movable subassembly 52 and the conversion member 30, which facilitates reducing the complexity of the structure of the electronic expansion valve 1 and reducing the production cost of the electronic expansion valve 1.

[0048] According to the electronic expansion valve 1 of the embodiment of the present application, the planar stop between the movable subassembly 52 and the conversion member 30 is used to achieve the coordination between the movable subassembly 52 and the conversion member 30, which can reduce the possibility of leakage of the electronic expansion valve 1. In addition, the electronic expansion valve 1 has a simple structure and is easy to install, which facilitates reducing the complexity of the structure of the electronic expansion valve 1 and reducing the production cost of the electronic expansion valve 1.

[0049] The electronic expansion valve 1 according to a specific embodiment of the present application is described below with reference to the accompanying drawings.

[0050] As shown in FIG. 1 to FIG. 6 , the electronic expansion valve 1 according to the embodiment of the present application includes a valve seat assembly 10 , a conversion member 30 , a rotation-stopping member 40 and a movable member 52 .

[0051] In some embodiments of the present application, the conversion member 30 includes a plurality of first stop planes 33 arranged at circumferential intervals, and the plurality of first stop planes 33 respectively abut against the movable subassembly 52, so as to increase the area of ​​mutual cooperation between the conversion member 30 and the movable subassembly 52, so that when the movable subassembly 52 rotates, there is sufficient action force between the movable subassembly 52 and the conversion member 30 to drive the conversion member 30 to rotate.

[0052] In some embodiments of the present application, the movable subassembly 52 includes a plurality of second stop planes 524 arranged at intervals along the circumferential direction, and the plurality of second stop planes 524 respectively abut against the plurality of first stop planes 33, so as to increase the area of ​​mutual cooperation between the conversion member 30 and the movable subassembly 52, so that when the movable subassembly 52 rotates, there is sufficient acting force between the movable subassembly 52 and the conversion member 30 to drive the conversion member 30 to rotate.

[0053] In some embodiments of the present application, the conversion member 30 is provided with a support portion 31, which supports the first end face 521 of the movable subassembly 52 toward the valve port, and the first end face 521 of the movable subassembly 52 faces the valve port 12, so as to utilize the conversion member 30 to support the position of the movable subassembly 52, thereby ensuring the cooperation between the movable subassembly 52 and the conversion member 30, so that when the movable subassembly 52 rotates, the movable subassembly 52 can smoothly drive the conversion member 30 to rotate through the plane, and the conversion member 30 can smoothly drive the valve needle assembly 20 to move back and forth.

[0054] As shown in Figure 1, in this embodiment, the first end face 521 is located at the upper end of the support part 31, and the upper end face of the support part 31 is abutted against the first end face 521 to limit the position of the movable assembly 52 in the installation cavity 11 along the up and down directions, thereby ensuring the stability of the cooperation between the movable assembly 52 and the conversion part 30, so that when the movable assembly 52 rotates, the movable assembly 52 can smoothly drive the conversion part 30 to rotate through the plane, so that the conversion part 30 can drive the valve needle assembly 20 to move back and forth, so that the valve needle assembly 20 can open or close the valve port 12.

[0055] In some optional embodiments of the present application, as shown in Figure 5, the movable subassembly 52 is provided with a plurality of stop members 523, and the stop members 523 are arranged at intervals on the inner peripheral wall of the movable subassembly 52, and the plurality of stop members 523 respectively stop at the support portion 31, so that the support portion 31 can support the movable subassembly 52.

[0056] In some embodiments, the support portion 31 is located below the stop member 523, and the lower end faces of multiple stop members 523 form a first end face 521. The first end face 521 is abutted against the upper end face of the support portion 31, so that the support portion 31 can support the stop member 523 and thus support the position of the movable subassembly 52.

[0057] Among them, multiple stop members 523 form a second stop plane 524 toward the side wall of the conversion member 30, the conversion member 30 is located between the multiple stop members 523, and the outer peripheral wall of the conversion member 30 has multiple first stop planes 33. The first stop planes 33 and the second stop planes 524 are in abutment with each other. When the movable assembly 52 rotates, the movable assembly 52 can drive the conversion member 30 to rotate, and the conversion member 30 can smoothly drive the valve needle assembly 20 to move.

[0058] As shown in Figure 5, in this embodiment, the movable subassembly 52 is provided with four stop members 523, and the side wall of the stop member 523 facing the conversion member 30 is a second stop plane 524, and the second stop plane 524 extends in the up and down directions. The first stop plane 33 on the conversion member 30 for abutting and cooperating with the second stop plane 524 extends in the up and down directions, so that the first stop plane 33 can abut and cooperate with the second stop plane 524, thereby realizing the cooperation between the movable subassembly 52 and the conversion member 30.

[0059] When the moving subassembly 52 rotates, the four stop members 523 rotate accordingly. At this time, the second stop plane 524 exerts a force on the first stop plane 33 to drive the conversion member 30 to rotate.

[0060] In some optional embodiments of the present application, the end of the conversion member 30 facing away from the valve port 12 extends out of the actuator assembly 52, and the electronic expansion valve 1 also includes a stop member 61, which is fixed to the end of the conversion member 30, and the stop member 61 stops at the second end face 522 of the actuator assembly 52 facing away from the valve port 12 to realize the connection between the conversion member 30 and the actuator assembly 52, so that when the actuator assembly 52 rotates, the actuator assembly 52 can drive the conversion member 30 to rotate together, so that the conversion member 30 can drive the valve needle assembly 20 to move back and forth in the installation cavity 11, so that the valve needle assembly 20 can open or close the valve port 12.

[0061] In some embodiments, as shown in Figures 1, 5, and 6, the valve seat assembly defines an installation cavity 11, and the valve needle assembly 20 can move in the installation cavity 11 in the up and down directions. The first end face 521 of the movable assembly 52 is located at the upper end face of the support portion 31, and the second end face 522 of the movable assembly 52 is located at the lower end of the stop member 61. The distance between the upper end face of the support portion 31 and the lower end face of the stop member 61 is adapted to the distance between the first end face 521 and the second end face 522, so that the first end face 521 and the second end face 522 are clamped and fixed between the support portion 31 and the stop member 61, thereby realizing a fixed connection between the movable assembly 52 and the conversion member 30. At the same time, the second stop plane 524 of the inner peripheral wall of the movable assembly 52 abuts against the first stop plane 33 of the outer peripheral wall of the rotor assembly 30, so that when the movable assembly 52 rotates, the movable assembly 52 can drive the conversion member 30 to rotate.

[0062] In some embodiments, as shown in Figure 6, the stopper 61 is a retaining ring, and the end of the conversion member 30 facing away from the valve port 12 is provided with a mounting groove 32, the retaining ring is fixed in the mounting groove 32, the retaining ring is located at the upper end of the second end face 522, and the lower end face of the retaining ring is abutted against the second end face 522, and the first end face 521 of the movable assembly 52 is abutted against the upper end of the support portion 31 to clamp the first end face 521 and the second end face 522 between the support portion 31 and the stopper 61, and at the same time, the second abutting plane 524 of the inner peripheral wall of the movable assembly 52 is abutted against the first abutting plane 33 of the outer peripheral wall of the rotor assembly 30 to realize the fixed connection between the movable assembly 52 and the conversion member 30, so that when the movable assembly 52 rotates, the movable assembly 52 can drive the conversion member 30 to rotate.

[0063] In some examples, the lower end surfaces of multiple stop members 523 form a first end surface 521, and the upper end surfaces of multiple stop members 523 form a second end surface 522. The stop member 61 is located at the upper end of the second end surface 522, and the support portion 31 is located at the lower end of the first end surface 521. The stop member 523 is clamped between the support portion 31 and the stop member 61 to achieve a fixed connection between the movable subassembly 52 and the conversion member 30, so that when the movable subassembly 52 rotates, the movable subassembly 52 can drive the conversion member 30 to rotate, and at the same time can limit the positions of the movable subassembly 52 and the conversion member 30 in the cavity along the up and down directions to avoid relative movement of the movable subassembly 52 and the conversion member 30.

[0064] In some embodiments of the present application, the electronic expansion valve 1 also includes a stopper 40, which is installed to the valve seat assembly 10. The stopper 40 cooperates with the mating portion 211 of the valve needle assembly 20 to limit the rotational freedom of the valve needle assembly 20. When the valve needle assembly 20 opens or closes the valve port 12, under the restriction of the stopper 40, the valve needle assembly 20 can only move back and forth but cannot rotate, thereby reducing the friction between the valve needle assembly 20 and the valve seat assembly 10, reducing the degree of mutual wear between the valve needle assembly 20 and the valve seat assembly 10, and facilitating the improvement of the service life of the valve needle assembly 20 and the service life of the electronic expansion valve 1.

[0065] In some embodiments, the conversion member 30 is threadedly engaged with the valve needle assembly 20. When the conversion member 30 rotates to drive the valve needle assembly 20 to move back and forth, the valve needle assembly 20 has a tendency to rotate. The anti-rotation member 40 is used to limit the rotational freedom of the valve needle assembly 20 to prevent the conversion member 30 from driving the valve needle assembly 20 to rotate, and then when the valve needle assembly 20 moves back and forth, when the valve needle assembly 20 opens or closes the valve port 12, it can reduce the friction between the valve needle assembly 20 and the side wall of the valve port 12, reduce the friction between the valve needle assembly 20 and the valve seat assembly 10, and at the same time, facilitate reducing the noise generated in the electronic expansion valve 1.

[0066] In some optional embodiments of the present application, the stop member 40 is located on the side of the conversion member 30 facing the valve port 12. While limiting the rotational freedom of the valve needle assembly 20, the stop member 40 can support the end of the valve needle assembly 20 close to the valve port 12, so that the valve needle assembly 20 can move back and forth smoothly in the installation cavity 11, thereby reducing the shaking of the valve needle assembly 20 during the reciprocating movement, so that the valve needle assembly 20 can smoothly open or close the valve port 12.

[0067] As shown in Figures 1 and 2, in this embodiment, the valve needle assembly 20 includes a valve stem 21 and a valve needle 22. The conversion member 30 is threadedly engaged with the upper part of the valve stem 21, and the valve needle 22 is driven to move by the valve stem 21. The stop member 40 is arranged at the lower part of the valve stem 21. The length of the valve stem 21 in the up and down directions is longer. The stop member 40 is arranged on the side of the conversion member 30 facing the valve port 12, that is, it is arranged at the lower part of the valve stem 21 to support the lower part of the valve stem 21, thereby facilitating the reduction of the frequency of shaking of the valve stem 21 during reciprocating movement, so that the valve stem 21 can reciprocate smoothly, so that the valve stem 21 can drive the valve needle 22 to reciprocate smoothly, so that the valve needle 22 can smoothly open or close the valve port 12. It should be understood here that the above-mentioned direction limitation is only for the convenience of describing the accompanying drawings, and will not limit the actual setting position and direction of the electronic expansion valve 1.

[0068] In some optional embodiments of the present application, the radial cross-section of the outer wall of the mating portion 211 along the valve needle assembly 20 is formed into a non-circular shape, and the stop member 40 is sleeved on the mating portion 211. The stop member 40 contacts and cooperates with the mating portion 211 so that the conversion member 30 drives the valve needle assembly 20 to move back and forth. When the valve needle assembly 20 has a tendency to rotate, the stop member 40 can limit the rotation of the mating portion 211, and then limit the rotation of the valve needle assembly 20, so that the valve needle assembly 20 can only move back and forth but cannot rotate, and then when the valve needle assembly 20 moves back and forth to open or close the valve port 12, it can reduce the friction between the valve needle assembly 20 and the valve port 12, and then reduce the friction between the valve needle assembly 20 and the valve seat assembly 10.

[0069] In some embodiments, the radial cross-section of the outer peripheral wall of the mating portion 211 can be a non-circular shape such as a triangle, rectangle, square, hexagon, etc., and the stop member 40 defines a corresponding non-circular hole, and the non-circular hole corresponds to a non-circular shape such as a triangle, rectangle, square, hexagon, etc. The inner peripheral wall of the stop member 40 is the first limiting surface 41, and the outer peripheral wall of the mating portion 211 is the second limiting surface 212.

[0070] Driven by the movable component 52, when the valve needle component 20 has a tendency to rotate, the valve needle component 20 cannot rotate under the restriction of the first limit surface 41, so as to limit the rotational freedom of the valve needle component 20, and thereby the valve needle component 20 can only move back and forth along the first direction and cannot rotate. Then, when the valve needle component 20 moves back and forth and when the valve needle component 20 opens or closes the valve port 12, the friction between the valve needle component 20 and the side wall of the valve port 12 can be reduced, thereby reducing the wear between the valve needle component 20 and the valve seat component 10. At the same time, by reducing the wear between the valve needle component 20 and the valve seat component 10, the noise generated by the electronic expansion valve 1 can be reduced.

[0071] In some embodiments of the present application, the mating portion 211 is suitable for abutting against the conversion member 30 to limit the movement of the valve needle assembly 20, thereby limiting the displacement direction of the valve needle assembly 20 so that the valve needle assembly 20 can smoothly open or close the valve port 12.

[0072] In some embodiments, the stop member 40 is sleeved on the mating portion 211, the inner peripheral wall of the stop member 40 includes a first limiting surface 41, and the outer peripheral wall of the mating portion 211 includes a second limiting surface 212. The first limiting surface 41 and the second limiting surface 212 both extend along the first direction. When the conversion member 30 drives the valve stem 21 to move back and forth along the first direction, the second limiting surface 212 moves along the first limiting surface 41. The first limiting surface 41 can limit the moving direction of the second limiting surface 212, and then limit the moving direction of the valve needle assembly 20, so that the valve needle assembly 20 can smoothly open or close the valve port 12.

[0073] In other embodiments of the present application, the outer peripheral wall of the mating portion 211 is provided with one of a guide groove and a guide protrusion, and the inner peripheral wall of the anti-rotation member 40 is provided with the other of a guide protrusion and a guide groove. The guide protrusion extends into the guide groove and can slide in the guide groove, so as to guide the moving direction of the valve needle assembly 20 by utilizing the cooperation of the guide protrusion and the guide groove, and at the same time, when the valve needle assembly 20 has a tendency to rotate, the rotation of the valve needle assembly 20 is restricted by utilizing the cooperation of the guide protrusion and the guide groove.

[0074] For example, the outer peripheral wall of the mating part 211 is provided with a guide groove, and the inner peripheral wall of the stop member 40 is provided with a guide protrusion. Both the guide groove and the guide protrusion extend along the first direction. When the conversion member 30 drives the valve needle assembly 20 to move along the first direction, the guide groove moves along the first direction, and the guide protrusion slides along the first direction in the guide groove to limit the moving direction of the mating part 211, and then limit the moving direction of the valve needle assembly 20, so that the valve needle assembly 20 can smoothly move back and forth along the first direction, and thus the valve needle assembly 20 can smoothly open or close the valve port 12.

[0075] At the same time, when the valve needle assembly 20 has a tendency to rotate, since the guide protrusion extends into the guide groove and the anti-rotation member 40 is fixed on the valve seat assembly 10, the side wall of the guide groove has an anti-rotation force on the guide protrusion, so that the valve needle assembly 20 can only move back and forth along the first direction and cannot rotate. Then, when the valve needle assembly 20 moves back and forth and when the valve needle assembly 20 opens or closes the valve port 12, the friction between the valve needle assembly 20 and the side wall of the valve port 12 can be reduced, thereby reducing the wear between the valve needle assembly 20 and the valve seat assembly 10, and at the same time, it is convenient to reduce the noise generated by the electronic expansion valve 1.

[0076] In some embodiments of the present application, the electronic expansion valve 1 also includes a stator assembly, which is installed to the valve seat assembly 10. The stator assembly cooperates with the movable assembly 52 so that the movable assembly 52 can rotate. When the movable assembly 52 rotates, it can drive the conversion member 30 to rotate. The conversion member 30 can drive the valve needle assembly 20 to move back and forth, so that the valve needle assembly 20 can open or close the valve port 12.

[0077] In some embodiments, the stator assembly includes a motor, the output shaft of which cooperates with the mover assembly 52 to drive the mover assembly 52 to rotate. In other embodiments, the stator assembly includes a coil winding, and the changing magnetic field generated by the coil winding when energized can drive the mover assembly 52 to rotate.

[0078] In some optional embodiments of the present application, as shown in Figures 2 and 3, the valve needle assembly 20 includes a valve stem 21, a valve needle 22 and an elastic member 23. The valve stem 21 cooperates with the conversion member 30 so that when the movable assembly 52 drives the conversion member 30 to rotate, the valve stem 21 can move back and forth under the drive of the conversion member 30. The valve needle 22 cooperates with the valve stem 21 so that when the valve stem 21 moves back and forth, the valve stem 21 can drive the valve needle 22 to move back and forth, thereby enabling the valve needle 22 to open or close the valve port 12.

[0079] The elastic member 23 is respectively connected to the valve stem 21 and the valve needle 22. When the valve needle 22 closes the valve port 12, the valve stem 21 can move toward the valve port 12 to compress the elastic member 23 and form a pre-tightening force. When the valve needle 22 closes the valve port 12, the elastic member 23 will exert a force on the valve needle 22 toward the valve port 12, so that the valve needle 22 can fully close the valve port 12, thereby reducing the possibility of a gap between the valve needle 22 and the valve port 12, reducing the possibility of leakage of the electronic expansion valve 1, and improving the qualified rate of the electronic expansion valve 1.

[0080] In some embodiments, the valve stem 21 can move back and forth in the up and down directions, and the valve stem 21 can drive the valve needle 22 to move back and forth in the up and down directions. The valve needle 22 forms a cone toward the lower end of the valve port 12, and the apex of the cone points downward. When the valve stem 21 drives the valve needle 22 to move downward, the distance between the outer peripheral surface of the valve needle 22 and the side wall of the valve port 12 gradually decreases. When the outer peripheral surface of the valve needle 22 and the side wall of the valve port 12 are stopped and engaged, the valve needle 22 closes the valve port 12. At this time, the valve stem 21 can continue to move downward but will not drive the valve needle 22 to move downward. At this time, the valve stem 21 compresses the elastic member 23 to form a pre-tightening force on the elastic member 23.

[0081] Specifically, after the elastic member 23 is compressed, the elastic member 23 exerts a downward force on the valve needle 22 so that the outer peripheral surface of the lower end of the valve needle 22 fits tightly with the wall surface of the valve port 12, thereby achieving sufficient sealing of the valve port 12, avoiding the existence of a gap between the valve needle 22 and the valve port 12, and avoiding liquid leakage.

[0082] In some examples, the lower end of the valve needle 22 is made of elastic material. When the valve needle 22 moves downward, the distance between the lower end of the valve needle 22 and the side wall of the valve port 12 gradually decreases, and the lower end of the valve needle 22 can adaptively deform to block the valve port 12.

[0083] In some specific embodiments of the present application, as shown in Figure 3, the valve needle 22 is provided with an accommodating chamber 221, the elastic member 23 is installed in the accommodating chamber 221, the valve stem 21 extends into the accommodating chamber 221, and the elastic member 23 stops at the valve stem 21 and the inner bottom wall of the accommodating chamber 221. When the valve stem 21 drives the valve needle 22 to move and close the valve port 12, the valve stem 21 can still move in the accommodating chamber 221 toward the valve port 12, so that the lower end of the valve stem 21 can compress the elastic member 23 in the accommodating chamber 221 and form a pre-tightening force on the elastic member 23. At this time, the elastic member 23 has a force on the valve needle 22 toward the valve port 12, so that the valve needle 22 can close the valve port 12 and prevent the electronic expansion valve 1 from leaking.

[0084] In some embodiments, a pressing sleeve 222 is provided at one end of the accommodating chamber 221 facing the valve stem 21, and the end of the valve stem 21 extending into the accommodating chamber 221 is suitable for abutting against the pressing sleeve 222, so that when the end of the valve stem 21 abuts against the pressing sleeve 222, the valve stem 21 can push the valve needle 22 to move. At the same time, the pressing sleeve 222 can limit the range of movement of the valve stem 21 in the accommodating chamber 221, thereby avoiding the valve stem 21 from compressing the elastic part 23 too much, thereby causing the elastic part 23 to fail.

[0085] In some embodiments, as shown in Figure 3, the valve stem 21 can move in the up and down directions, and the pressing sleeve 222 is located below the valve stem 21. When the lower end of the valve stem 21 is stopped and engaged with the pressing sleeve 222, the elastic member 23 is compressed and exerts a force on the valve needle 22 toward the valve port 12. At this time, the lower end of the valve stem 21 cannot continue to move in the accommodating cavity 221, and cannot continue to compress the elastic member 23 in the accommodating cavity 221, so as to control the compression amount of the elastic member 23, and then control the size of the preload force on the elastic member 23, so as to avoid the elastic member 23 exerting too much downward force on the valve needle 22, causing the valve needle 22 to be stuck at the valve port 12.

[0086] In some embodiments, the valve stem 21 can push the valve needle 22 to move back and forth in the up and down directions. The conversion part 30 is located at the upper end of the matching part 211. When the valve needle 22 is stopped and engaged with the wall of the valve port 12, the valve needle 22 closes the valve port 12 and the valve needle 22 no longer moves downward. When the valve port 12 needs to be opened, the conversion part 30 drives the valve stem 21 to move upward, and the valve stem 21 drives the valve needle 22 to move upward to open the valve port 12. When the upper end surface of the matching part 211 is stopped and engaged with the lower end surface of the conversion part 30, the valve stem 21 no longer moves upward, and the valve stem 21 no longer drives the valve needle 22 to move upward, so as to limit the range of movement of the valve stem 21 and the valve needle 22 in the up and down directions, so that the valve needle 22 can smoothly open or close the valve port 12.

[0087] In some optional embodiments of the present application, as shown in Figure 2, the outer peripheral wall of the valve stem 21 is provided with an annular groove 24, and the annular groove 24 is spaced apart from the inner wall of the conversion member 30 to reduce the matching area of ​​the valve stem 21 and the conversion member 30, thereby facilitating the reduction of wear between the valve stem 21 and the conversion member 30.

[0088] Specifically, when the stator assembly drives the conversion member 30 to rotate and the conversion member 30 drives the valve stem 21 to move back and forth, the valve stem 21 will move relative to the conversion member 30. An annular groove 24 is provided on the outer peripheral wall of the valve stem 21 to reduce the contact area between the outer peripheral wall of the valve stem 21 and the conversion member 30. As a result, when the valve stem 21 moves relative to the conversion member 30, the wear between the valve stem 21 and the conversion member 30 can be reduced, thereby facilitating the improvement of the service life of the electronic expansion valve 1.

[0089] In some embodiments of the present application, as shown in Figure 1, the valve seat assembly 10 includes a valve seat 101 and a valve cover 102, the valve seat 101 defines an installation cavity 11 with an upper opening, the valve port 12 is located at the lower end of the valve seat 101, and the valve port 12 is connected to the installation cavity 11. The valve needle assembly 20, the stator assembly and the mover assembly 52, the stop member 40 and other components placed in the installation cavity 11 can enter the installation cavity 11 from the top opening.

[0090] The valve port 12 is provided at the lower end of the valve seat 101 so that the medium such as liquid entering the valve seat assembly 10 can flow out from the valve port 12 under the influence of gravity.

[0091] The following describes a thermal management system 92 according to an embodiment of the present application. The thermal management system 92 according to an embodiment of the present application includes the electronic expansion valve 1 according to the above-mentioned embodiment of the present application.

[0092] According to the thermal management system 92 of the embodiment of the present application, by utilizing the electronic expansion valve 1 according to the above-mentioned embodiment of the present application, the possibility of leakage of the electronic expansion valve 1 can be reduced, and the structure is simple and easy to install, which facilitates reducing the complexity of the structure of the electronic expansion valve 1 and reducing the production cost of the electronic expansion valve 1.

[0093] A vehicle 91 according to an embodiment of the present application will be described below with reference to FIG 7. The vehicle 91 according to the embodiment of the present application includes a thermal management system 92 according to the above-described embodiment of the present application.

[0094] According to the vehicle 91 of the embodiment of the present application, by utilizing the thermal management system 92 according to the above-mentioned embodiment of the present application, the possibility of leakage of the electronic expansion valve 1 can be reduced, and the structure is simple and easy to install, which facilitates reducing the complexity of the structure of the electronic expansion valve 1 and reducing the production cost of the electronic expansion valve 1.

[0095] Other structures and operations of the vehicle 91 according to the embodiment of the present application are known to ordinary technicians in this field and will not be described in detail here.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0097] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electronic expansion valve, wherein: include: A valve seat assembly, wherein the valve seat assembly is provided with a valve port; A valve needle assembly, the valve needle assembly is reciprocably disposed on the valve seat assembly to open or close the valve port; a conversion member, the conversion member cooperates with the valve needle assembly to convert the rotation of the conversion member into a reciprocating movement of the valve needle assembly; The movable subassembly is sleeved on the conversion member, and the movable subassembly and the conversion member have at least one plane abutting against each other, so that the movable subassembly drives the conversion member to rotate.

2. The electronic expansion valve according to claim 1, wherein: The outer peripheral wall of the conversion member includes a plurality of first stop planes spaced apart along the circumferential direction, and the plurality of first stop planes are respectively in contact with the movable subassembly.

3. The electronic expansion valve according to claim 2, wherein: The inner circumferential wall of the movable subassembly includes a plurality of second stop planes spaced apart along the circumferential direction, and the plurality of second stop planes are respectively in contact with the plurality of first stop planes.

4. The electronic expansion valve according to any one of claims 1 to 3, wherein: The conversion member is provided with a supporting portion, and the supporting portion supports a first end surface of the mover assembly facing the valve port.

5. The electronic expansion valve according to claim 4, wherein: The inner peripheral wall of the movable subassembly is provided with a plurality of stop members arranged at intervals, and the plurality of stop members respectively stop against the support portion.

6. The electronic expansion valve according to any one of claims 1 to 5, wherein: The end of the conversion member facing away from the valve port extends out of the movable subassembly. The electronic expansion valve further comprises a stopper, which is fixed to the end of the conversion member and stops at a second end face of the movable subassembly facing away from the valve port.

7. The electronic expansion valve according to any one of claims 1 to 6, wherein: Also includes: A rotation stopper is mounted to the valve seat assembly, and the rotation stopper cooperates with a matching portion of the valve needle assembly to limit the rotational freedom of the valve needle assembly.

8. The electronic expansion valve according to claim 7, wherein: The anti-rotation component is located on a side of the conversion component facing the valve port.

9. The electronic expansion valve according to claim 7 or 8, wherein: The cross section of the outer peripheral wall of the matching portion along the radial direction of the valve needle assembly is formed into a non-circular shape, and the rotation-stopping member is sleeved on the matching portion and the rotation-stopping member is in contact with and matched with the matching portion.

10. The electronic expansion valve according to any one of claims 7 to 9, wherein: The matching portion is suitable for abutting against the conversion member to limit the movement of the valve needle assembly.

11. The electronic expansion valve according to any one of claims 1 to 10, wherein: The valve needle assembly comprises: A valve stem, the valve stem cooperates with the conversion member so that the rotation of the conversion member is converted into a reciprocating movement of the valve stem; A valve needle, the valve needle is used to open or close the valve port, the valve needle cooperates with the valve stem to be driven to move by the valve stem; An elastic member is connected to the valve stem and the valve needle respectively. When the valve needle closes the valve port, the valve stem can move toward the valve port to compress the elastic member to form a pre-tightening force.

12. The electronic expansion valve according to claim 11, wherein: The valve needle is provided with an accommodating cavity, the elastic member is installed in the accommodating cavity, the valve stem extends into the accommodating cavity, and the elastic member abuts against the valve stem and the inner bottom wall of the accommodating cavity.

13. The electronic expansion valve according to claim 12, wherein: A pressing sleeve is provided at one end of the accommodating cavity facing the valve stem, and the end of the valve stem extending into the accommodating cavity is suitable for abutting against the pressing sleeve.

14. A thermal management system, wherein: It comprises an electronic expansion valve according to any one of claims 1-13.

15. A vehicle, wherein: Comprising a thermal management system according to claim 14.

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