Electronic expansion valve, integrated valve, thermal management system, and vehicle

Abstract

An electronic expansion valve (1), an integrated valve (8), a thermal management system (92), and a vehicle (91). The electronic expansion valve (1) comprises: a valve seat (12), wherein a valve port (131) is formed on the valve seat (12); a rotating assembly; a valve needle assembly (20), wherein the valve needle assembly (20) comprises a valve rod (21) and a valve needle (22), the valve rod (21) cooperates with the rotating assembly to convert the rotation of the rotating assembly into the reciprocating movement of the valve rod (21), and the valve needle (22) is used for opening or blocking the valve port (131); and a first elastic member (44), wherein when the valve needle (22) blocks the valve port (131), the valve rod (21) can move towards the valve port (131) to compress the first elastic member (44) to form a pre-tightening force.

Description

Electronic expansion valves and integrated valves, thermal management systems, vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 2023111358279 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 an integrated valve, a thermal management system, and a vehicle. 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. The electronic expansion valve comprises a first elastic member disposed between a valve stem and a valve needle, so that the first elastic member applies a force to the valve needle toward the valve port. This increases the stopping force between the valve needle and the valve seat when the valve needle seals the valve port, allowing the valve needle to fit tightly against the valve seat to fully seal the valve port, thereby reducing the possibility of internal leakage in the electronic expansion valve.

[0007] The present application also provides an integrated valve, 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, which is provided with a valve port; a rotating assembly, which rotates relative to the valve seat; a valve needle assembly, which includes a valve stem and a valve needle, the valve stem cooperates with the rotating assembly so that the rotation of the rotating assembly is converted into reciprocating movement of the valve stem, the valve stem does not rotate around its axial direction, and the valve needle is used to open or block the valve port; a first elastic member, the first elastic member is respectively connected to the valve stem and the valve needle, the valve needle cooperates with the valve stem to be driven to reciprocate by the valve stem, wherein when the valve needle blocks the valve port, the valve stem can move toward the valve port to compress the first elastic member to form a preload.

[0009] According to the electronic expansion valve of the embodiment of the present application, a first elastic member is arranged between the valve stem and the valve needle, so that the first elastic member applies a force toward the valve port to the valve needle, so as to increase the stopping force between the valve needle and the valve seat when the valve needle blocks the valve port, so that the valve needle can fit tightly with the valve seat to fully block the valve port, thereby facilitating reducing the possibility of internal leakage 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, an accommodating cavity is provided in the valve needle, the first elastic member is installed in the accommodating cavity, and the first elastic member is respectively connected to the valve stem and the valve needle to apply a force to the valve needle toward the valve port.

[0012] According to some embodiments of the present application, a sleeve is further included, wherein the sleeve is fixed to the valve seat, and the rotating rod assembly is rotatably disposed in the sleeve.

[0013] In some embodiments, a first fitting is provided in the sleeve, the rotating assembly and the first fitting are rotatable relative to each other, and the rotating assembly cooperates with the first fitting to radially limit the rotating assembly.

[0014] In some examples, the rotating assembly is plug-fitted to the first mating member.

[0015] Furthermore, an insertion groove is provided on the end surface of the first fitting member facing the rotating assembly, and the rotating assembly is inserted into the insertion groove.

[0016] According to some embodiments of the present application, the rotating assembly includes: a conversion member, which cooperates with the valve stem to convert the rotation of the conversion member into reciprocating movement of the valve stem; and a rotor component, which cooperates with the first end of the conversion member to drive the conversion member to rotate.

[0017] According to some optional embodiments of the present application, the conversion member includes a first portion provided at a first end, the first portion is a metal member, and the first portion is welded to the rotor component.

[0018] In some embodiments, the conversion member further includes a second portion, the second portion is fixed to the first portion, the second portion is a resin member, and the second portion is threadedly engaged with the valve stem.

[0019] According to some embodiments of the present application, the valve seat is provided with a bearing component, the second end of the conversion member cooperates with the bearing component, and the second end is opposite to the first end.

[0020] According to some optional embodiments of the present application, the conversion member includes a third part, the third part is a metal member, the third part is provided with a first support member, and the bearing component is supported by the first support member.

[0021] According to some specific embodiments of the present application, a portion of the third portion is bent to form the first support member.

[0022] According to some optional embodiments of the present application, the electronic expansion valve further includes an anti-rotation component, which is provided on a side of the conversion component facing the valve port, and cooperates with the valve needle assembly to limit the rotational freedom of the valve needle assembly.

[0023] In some embodiments, the valve needle assembly further comprises a guide sleeve, which is fixed to the valve stem, wherein the guide sleeve has a non-circular cross-section along the radial direction of the valve needle assembly, and an outer peripheral wall of the guide sleeve is adapted to cooperate with the anti-rotation part to limit the rotational freedom of the guide sleeve.

[0024] According to the second aspect embodiment of the present application, an integrated valve is proposed, which includes the electronic expansion valve and a valve plate according to the embodiment of the first aspect of the present application, the valve plate is provided with an assembly cavity, a first flow channel and a second flow channel, the first flow channel is connected to the assembly cavity through a first opening, and the second flow channel is connected to the assembly cavity through a second opening; the electronic expansion valve is installed in the assembly cavity, the valve port is connected to the second opening, and the flow channel port provided on the valve seat is connected to the first opening.

[0025] According to the integrated valve 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, a first elastic member is arranged between the valve stem and the valve needle, so that the first elastic member applies a force toward the valve port to the valve needle, so as to increase the stopping force between the valve needle and the valve seat when the valve needle blocks the valve port, so that the valve needle can fit tightly with the valve seat to fully block the valve port, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve.

[0026] According to some optional embodiments of the present application, the minimum flow area of ​​the first opening is D1, the minimum flow area of ​​the flow channel port is D2, the minimum flow area of ​​the valve port is D3, and the minimum flow area of ​​the second opening is D4, wherein D4>D1>2D2>4D3 is satisfied.

[0027] According to an embodiment of a third aspect of the present application, a thermal management system is proposed, which includes the electronic expansion valve according to the embodiment of the first aspect of the present application or the integrated valve according to the embodiment of the second aspect of the present application.

[0028] 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 or the integrated valve described in the embodiment of the second aspect of the present application, a first elastic member is arranged between the valve stem and the valve needle, so that the first elastic member applies a force toward the valve port to the valve needle, so as to increase the stopping force between the valve needle and the valve seat when the valve needle blocks the valve port, so that the valve needle can fit tightly with the valve seat to fully block the valve port, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve.

[0029] According to a fourth aspect of the present application, a vehicle is provided. The vehicle includes the thermal management system according to the embodiment of the third aspect of the present application.

[0030] According to the vehicle of the embodiment of the present application, by utilizing the thermal management system described in the embodiment of the third aspect of the present application, a first elastic member is arranged between the valve stem and the valve needle, so that the first elastic member applies a force toward the valve port to the valve needle, so as to increase the stopping force between the valve needle and the valve seat when the valve needle blocks the valve port, so that the valve needle can fit tightly with the valve seat to fully block the valve port, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve.

[0031] 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

[0032] 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:

[0033] FIG1 is a schematic structural diagram of an electronic expansion valve according to an embodiment of the present application;

[0034] FIG2 is a cross-sectional view of FIG1 at AA;

[0035] FIG3 is a schematic structural diagram of an electronic expansion valve according to an embodiment of the present application;

[0036] FIG4 is a cross-sectional view of FIG3;

[0037] FIG5 is a schematic diagram of a partial structure of an electronic expansion valve according to an embodiment of the present application;

[0038] FIG6 is a cross-sectional view of FIG5;

[0039] FIG7 is a partial structural diagram of an electronic expansion valve according to an embodiment of the present application;

[0040] FIG8 is a cross-sectional view at BB in FIG7 ;

[0041] FIG9 is an enlarged view of point G in FIG8 ;

[0042] FIG10 is a schematic structural diagram of a conversion member and a bearing component according to an embodiment of the present application;

[0043] FIG11 is a schematic structural diagram of a conversion member and a bearing component according to an embodiment of the present application;

[0044] FIG12 is a cross-sectional view of the structure of a conversion member and a bearing component according to an embodiment of the present application;

[0045] FIG13 is a cross-sectional view of the structure of the conversion member and the bearing component according to an embodiment of the present application, where the end portion of the conversion member forms a first support member;

[0046] FIG14 is a schematic diagram of a partial structure of an electronic expansion valve according to an embodiment of the present application;

[0047] FIG15 is a cross-sectional view of a portion CC in FIG14;

[0048] FIG16 is a schematic diagram of a partial structure of an electronic expansion valve according to an embodiment of the present application;

[0049] FIG17 is a cross-sectional view at DD in FIG16;

[0050] FIG18 is a schematic structural diagram of a sleeve and a first matching member according to an embodiment of the present application;

[0051] FIG19 is a cross-sectional view of FIG18;

[0052] FIG20 is a schematic structural diagram of an anti-rotation member according to an embodiment of the present application;

[0053] FIG21 is a schematic structural diagram of an anti-rotation member according to an embodiment of the present application;

[0054] FIG22 is a cross-sectional view of the structure of an anti-rotation member according to an embodiment of the present application;

[0055] FIG23 is a schematic structural diagram of a valve needle assembly according to an embodiment of the present application;

[0056] FIG24 is a cross-sectional view of the structure of a valve needle assembly according to an embodiment of the present application;

[0057] FIG25 is a schematic structural diagram of a valve stem according to an embodiment of the present application;

[0058] FIG26 is a schematic structural diagram of a guide sleeve according to an embodiment of the present application;

[0059] FIG27 is a schematic structural diagram of an electronic expansion valve and a valve plate according to an embodiment of the present application;

[0060] FIG28 is a cross-sectional view of the structure of an electronic expansion valve and a valve plate according to an embodiment of the present application;

[0061] Figure 29 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0062] Reference numerals: electronic expansion valve 1,

[0063] Second support member 111, mounting cavity 115,

[0064] Valve seat 12, flow channel opening 121, valve port 131,

[0065] First fitting 16, inserting groove 161, sleeve 17, coil assembly 19,

[0066] Valve needle assembly 20, valve stem 21, guide inclined surface 211, first step surface 212, first cylindrical portion 213, second cylindrical portion 214, second step surface 215,

[0067] Valve needle 22, accommodating cavity 221, valve sleeve 23,

[0068] Anti-rotation member 30, cavity 31, convex portion 32, guide sleeve 41, bearing component 42, first elastic member 44,

[0069] Converter 50, first portion 501, second portion 502, third portion 503, first support member 511, first stop portion 515,

[0070] Rotor component 60, connecting portion 61,

[0071] Valve plate 70, first flow channel 71, second flow channel 72, assembly cavity 73,

[0072] Integrated valve 8 , vehicle 91 , thermal management system 92 . DETAILED DESCRIPTION

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] The electronic expansion valve 1 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0079] As shown in FIG. 2 and FIG. 23 to FIG. 25 , the electronic expansion valve 1 according to the embodiment of the present application includes a valve seat 12 , a rotating assembly, a valve needle assembly 20 and a first elastic member 44 .

[0080] The valve seat 12 is provided with a valve port 131, and the rotating assembly rotates relative to the valve seat 12. The valve needle assembly 20 includes a valve stem 21 and a valve needle 22. The valve stem 21 cooperates with the rotating assembly so that the rotation of the rotating assembly is converted into the reciprocating movement of the valve stem 21. The first elastic member 44 is connected to the valve stem 21 and the valve needle 22 respectively. The valve needle 22 cooperates with the valve stem 21 to be driven to reciprocate by the valve stem 21. The valve stem 21 does not rotate around its axial direction. The valve needle 22 can open or block the valve port 131 when it moves reciprocatingly.

[0081] Among them, when the valve needle 22 blocks the valve port 131, the valve stem 21 can move toward the valve port 131 to compress the first elastic member 44 to form a pre-tightening force. At this time, the first elastic member 44 has a force on the valve needle 22 toward the valve port 131, thereby increasing the stopping force between the valve needle 22 and the valve seat 12, so that the valve needle 22 can fully block the valve port 131, and can reduce the possibility of leakage at the valve port 131 of the electronic expansion valve 1 when blocking the valve port 131, thereby facilitating improving the qualified rate of the electronic expansion valve 1.

[0082] In the related art, the valve stem is driven by the rotor to rotate around its axis, and the valve stem cooperates with the nut to convert the rotation of the valve stem into reciprocating movement of the valve stem, and thus into reciprocating movement of the valve needle. Since the valve stem is connected to the valve needle, the rotation of the valve stem will cause the valve needle to at least have a tendency to rotate, which will increase the friction between the valve needle and the valve port, resulting in possible leakage, and the wear of the valve needle will reduce the life of the valve needle. In the present application, the valve stem 21 does not rotate around the axis, thereby avoiding the occurrence of the above-mentioned problems and further reducing the possibility of leakage of the electronic expansion valve 1.

[0083] According to the electronic expansion valve 1 of the embodiment of the present application, a first elastic member 44 is provided between the valve stem 21 and the valve needle 22, so that the first elastic member 44 applies a force toward the valve port 131 to the valve needle 22, so as to increase the stopping force between the valve needle 22 and the valve seat 12 when the valve needle 22 blocks the valve port 131, so that the valve needle 22 can fit tightly with the valve seat 12 to fully block the valve port 131, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve 1.

[0084] The electronic expansion valve 1 according to a specific embodiment of the present application is described below with reference to the accompanying drawings.

[0085] As shown in FIG. 2 and FIG. 23 to FIG. 25 , the electronic expansion valve 1 according to the embodiment of the present application includes a valve seat 12 , a rotating assembly, a valve needle assembly 20 and a first elastic member 44 .

[0086] In some embodiments of the present application, as shown in Figure 24, a accommodating chamber 221 is provided in the valve needle 22, and a first elastic member 44 is provided in the accommodating chamber 221. The first elastic member 44 is respectively connected to the valve stem 21 and the valve needle 22 to apply a force to the valve needle 22 toward the valve port 131.

[0087] In some embodiments, as shown in FIG6 , the first elastic member 44 extends in the up-down direction (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). When the valve needle 22 blocks the valve port 131, the first elastic member 44 exerts a downward force on the valve needle 22 so that the valve needle 22 can fully block the valve port 131, thereby preventing the electronic expansion valve 1 from leaking when blocking the valve port 131, thereby improving the qualified rate of the electronic expansion valve 1.

[0088] In some embodiments of the present application, the electronic expansion valve 1 further includes a sleeve 17, which is fixed to the valve seat 12, and the rotating assembly is rotatably disposed in the sleeve 17, so that the sleeve 17 provides a relatively closed environment for the rotating assembly, so that the rotating assembly can rotate stably in the sleeve 17, thereby preventing objects in the external environment from affecting the rotation of the rotating assembly.

[0089] In some optional embodiments of the present application, a first fitting part 16 is provided in the sleeve 17, and the rotating assembly and the first fitting part 16 are rotatable relative to each other. The rotating assembly and the first fitting part 16 cooperate to radially limit the rotating assembly so as to support the rotation of the rotating assembly, thereby reducing the radial shaking of the rotating assembly and allowing the rotating assembly to rotate stably in the sleeve 17.

[0090] Specifically, since the rotating assembly has a certain length, when the rotating assembly rotates, the rotating assembly is prone to rocking along its radial direction, so that the rotating assembly cooperates with the first fitting 16, and the first fitting 16 is used to support the rotation of the rotating assembly. Therefore, when the first fitting 16 rotates, the amplitude of the rocking of the first fitting 16 can be reduced, which facilitates improving the smoothness of the rotation of the first fitting 16 and reducing the possibility of collision between the first fitting 16 and the sleeve 17.

[0091] As shown in FIG2 , in this embodiment, the sleeve 17 is fixed on the valve seat 12 , and the sleeve 17 and the valve seat 12 jointly define an accommodating cavity. The rotating assembly is rotatably disposed in the accommodating cavity. The first mating member 16 is disposed in the sleeve 17 and rotatably cooperates with the rotating assembly.

[0092] In some specific embodiments of the present application, the rotating component is plugged into and rotationally matched with the first mating piece 16, so that when the rotating component rotates, the first mating piece 16 can support the rotating component so that the rotating component can rotate stably. In addition, the first mating piece 16 will not interfere with the rotation of the rotating component, so that the rotating component can smoothly drive the valve stem 21 to move back and forth.

[0093] In some specific embodiments of the present application, as shown in Figures 4 and 19, the end surface of the first fitting 16 facing the rotating component is provided with an insertion groove 161, and the rotating component is inserted into the insertion groove 161. When the rotating component rotates, the side wall of the insertion groove 161 supports the rotation of the rotating component, so as to reduce the shaking amplitude of the end of the rotating component when the rotating component rotates, so that the rotating component can rotate stably, so that a safe distance can be maintained between the rotating component and the sleeve 17, thereby reducing the possibility of collision between the rotating component and the sleeve 17.

[0094] Specifically, if the length of the rotating assembly is long, the end of the rotating assembly will swing more greatly when the rotating assembly rotates, so the end of the rotating assembly is inserted into the insertion groove 161 to support the end of the rotating assembly, thereby reducing the swing amplitude of the end of the rotating assembly, improving the smoothness of the rotation of the rotating assembly, and reducing the possibility of the rotating assembly colliding with the sleeve 17 during rotation.

[0095] In some embodiments of the present application, as shown in Figure 2, the rotating assembly includes a conversion member 50 and a rotor member 60. The rotor member 60 cooperates with the first end of the conversion member 50 to drive the conversion member 50 to rotate. The conversion member 50 cooperates with the valve stem 21 so that the rotation of the conversion member 50 is converted into the reciprocating movement of the valve stem 21. When the valve stem 21 can drive the valve needle 22 to move back and forth, the valve needle 22 can open or close the valve port 121.

[0096] Since the rotor component 60 drives the conversion component 50 to rotate, and the conversion component 50 only rotates but does not move, the rotor component 60 also only rotates but does not move. In this way, the axial relative position of the rotor component 60 and the external coil remains unchanged, and the coil can always provide the maximum driving force to the rotor component 60. In this way, the valve opening ability of the electronic expansion valve is improved.

[0097] In some embodiments, one of the rotor component 60 and the conversion component 50 is plugged into and rotationally engaged with the first mating component 16, or both the rotor component 60 and the conversion component 50 are plugged into and rotationally engaged with the first mating component 16, so as to reduce the possibility of the rotor component 60 and the conversion component 50 shaking along their radial direction and ensure the stable rotation of the rotor component 60 and the conversion component 50.

[0098] Among them, since the conversion member 50 cooperates with the valve stem 21, the possibility of the valve stem 21 and the valve needle 22 shaking along their radial direction can be reduced by reducing the feasibility of the conversion member 50 shaking along its radial direction. Then, when the valve needle 22 opens or closes the valve port 131, the coaxiality of the valve needle 22 and the valve port 131 is ensured, so that the valve needle 22 can completely block the valve port 11, thereby reducing the possibility of leakage of the electronic expansion valve 1, and at the same time, it can also improve the stability of the cooperation between the conversion member 50 and the valve stem 21.

[0099] In some optional embodiments of the present application, as shown in Figures 4 and 8, the conversion member 50 includes a first part 501, which is a metal part. The first part 501 is welded to the rotor component 60 to achieve the connection between the conversion member 50 and the rotor component 60, and can drive the conversion member 50 to rotate when the rotor component 60 rotates.

[0100] As shown in Figure 4, in this embodiment, the rotor component 60 includes a connecting portion 61, which is a metal part. The connecting portion 61 is welded to the first part 501 to fix the rotor component 60 and the conversion component 50 together by welding, so that when the rotor component 60 rotates, the conversion component 50 can be smoothly driven to rotate. When the conversion component 50 rotates, the conversion component 50 can drive the valve needle assembly 20 to move back and forth, so that the valve needle assembly 20 can open or block the valve port 131.

[0101] The rotor component 60 and the conversion component 50 are welded and fixed together, and no additional components are required to fix the conversion component 50 and the rotor component 60. This makes it easy to reduce the number of components in the electronic expansion valve 1 and reduce the complexity of the components in the electronic expansion valve 1.

[0102] In some optional embodiments of the present application, as shown in Figures 4 and 8, the conversion member 50 also includes a second part 502, which is fixed to the first part 501. The second part 502 is a resin part, and the second part 502 is threadedly engaged with the valve needle 21. In this way, while achieving the cooperation between the conversion member 50 and the second part 502, it is convenient to reduce the weight of the conversion member 50.

[0103] The second portion 502 is made of a resin member, which has lubricating and wear-resistant properties. This helps reduce friction between the second portion 502 and the valve stem 21 when the conversion member 50 rotates. In some embodiments, the second portion 502 is internally threaded, and the valve stem 21 is externally threaded. The second portion 502 and the valve stem 21 are threadedly engaged. When the second portion 502 rotates to drive the valve stem 21 to reciprocate, the resin member can lubricate the internal and external threads, ensuring that the second portion 502 can smoothly drive the valve stem 21 to reciprocate.

[0104] In some embodiments, the first part 501 and the second part 502 on the conversion member 50 are formed by separate processing, so that the first part 501 and the second part 502 can be formed of different materials according to needs. Specifically, the first part 501 is formed as a metal part, so that the first part 501 can be welded to the rotor part 60 to be driven to rotate by the rotor part 60. The second part 502 is a resin part, and the second part 502 is threadedly matched with the valve needle assembly 20 to convert the rotation of the conversion member 50 into the reciprocating movement of the valve needle assembly 20, so that the valve needle assembly 20 can smoothly open or block the valve port 131.

[0105] In some optional embodiments of the present application, the valve seat 12 is provided with a bearing component 42, and the second end of the conversion member 50 cooperates with the bearing component 42 to utilize the bearing component 42 to support the rotation of the conversion member 50 and limit the position of the conversion member 50, so that the conversion member 50 can rotate smoothly to drive the valve stem 21 to move back and forth.

[0106] In some embodiments, as shown in Figure 2, the electronic expansion valve 1 also includes a coil assembly 19, which is coupled to the rotor component 60. When the coil assembly 19 is energized, it can drive the rotor component 60 to rotate. The rotor component 60 drives the conversion member 50 to rotate through the first part 501. Since the second end of the conversion member 50 is matched with the bearing component 42, the conversion member 50 is threadedly matched with the valve stem 21. Therefore, when the conversion member 50 rotates, the conversion member 50 can drive the valve stem 21 to move back and forth, so that the valve needle 22 can open or block the valve port 131.

[0107] Among them, when the valve stem 21 and the valve needle 22 move back and forth, since one end of the conversion part 50 cooperates with the bearing part 42, the conversion part 50 will not move back and forth with the valve stem 21, and the rotor part 60 will not move back and forth with the valve stem 21, so as to ensure that the rotor part 60 will not move in the up and down directions relative to the coil assembly 19, thereby ensuring the cooperation between the rotor part 60 and the coil assembly 19, so that the coil assembly 19 can smoothly and stably drive the rotor part 60 to rotate.

[0108] In some embodiments, the first end of the conversion member 50 is plugged into and rotatably engaged with the first matching member 16, and the second end of the conversion member 50 is engaged with the bearing component 42. When the rotor component 60 drives the conversion member 50 to rotate, the first matching member 16 supports the first end of the conversion member 50, and the bearing component 42 supports the second end of the conversion member 50, so that the conversion member 50 can rotate smoothly. By supporting the end of the conversion member 50, when the rotor component 60 drives the conversion member 50 to rotate, the amplitude of the shaking of the conversion member 50 during rotation can be reduced, thereby improving the stability of the rotation of the conversion member 50, improving the stability of the rotation of the rotor component 60, and reducing the possibility of the rotor component 60 colliding with the sleeve 17.

[0109] Specifically, since the conversion member 50 has a certain length, when the rotor component 60 drives the conversion member 50 to rotate, the end of the conversion member 50 is prone to shaking, so that the first end of the conversion member 50 is plugged into and rotated with the first matching member 16, so that the first matching member 16 can support the first end of the conversion member 50, and then when the conversion member 50 rotates, the amplitude of the shaking of the first end of the conversion member 50 can be reduced, so that the second end of the conversion member 50 is matched with the bearing component 42, and when the conversion member 50 rotates, the bearing component 42 can support the second end of the conversion member 50, and then when the conversion member 50 rotates, the amplitude of the shaking of the second end of the conversion member 50 can be reduced, thereby improving the stability of the rotation of the conversion member 50.

[0110] Specifically, since the conversion member 50 is fixedly matched with the rotor member 60, when the conversion member 50 shakes, the conversion member 50 will drive the rotor member 60 to shake, and the rotor member 60 is likely to collide with the sleeve 17 when shaking. Therefore, by reducing the shaking amplitude of the conversion member 50, the shaking amplitude of the rotor member 60 can be reduced, so that a safe distance can be maintained between the rotor member 60 and the sleeve 17, so as to reduce the possibility of the rotor member 60 and the sleeve 17 colliding when the rotor member 60 rotates, thereby extending the service life of the rotor member 60 and the sleeve 17 and reducing the noise generated in the electronic expansion valve 1.

[0111] At the same time, since the conversion member 50 cooperates with the valve stem 21, the possibility of the valve stem 21 and the valve needle 22 shaking along their radial direction can be reduced by reducing the feasibility of the conversion member 50 shaking along its radial direction. Therefore, when the valve needle 22 opens or closes the valve port 131, the coaxiality of the valve needle 22 and the valve port 131 is ensured, so that the valve needle 22 can completely block the valve port 11, thereby reducing the possibility of leakage of the electronic expansion valve 1.

[0112] In some optional embodiments of the present application, as shown in Figures 4 and 8, the conversion member 50 includes a third part 503, the third part 503 is a metal part, the third part 503 is provided with a first support member 511, the bearing component 42 is supported on the first support member 511, so that the bearing component 42 and the conversion member 50 can be matched through the first support member 511, so that the bearing component 42 can support the third part 503 to support the conversion member 50. By supporting the end of the conversion member 50, the smoothness of the rotation of the conversion member 50 can be improved, the smoothness of the rotation of the rotor component 60 can be improved, and the possibility of collision between the rotor component 60 and the sleeve 17 can be reduced.

[0113] In some specific embodiments of the present application, a portion of the third part 503 is bent to form a first support member 511. This arrangement facilitates the installation of the bearing component 42 on the conversion member 50. Specifically, after the bearing component 42 is sleeved from the end of the third part 503 onto the conversion member 50, the end of the third part 503 is bent so that the first support member 511 contacts and cooperates with the bearing component 42 to achieve a mating connection between the bearing component 42 and the conversion member 50.

[0114] In some embodiments, as shown in Figures 8 and 9, a first stop portion 515 is provided on the conversion member 50, and the bearing component 42 is sleeved onto the conversion member 50 from the lower end of the conversion member 50. After the upper end of the inner ring of the bearing component 42 is abutted against the first stop portion 515, the lower end of the third part 503 is bent so that the first support member 511 is abutted against the lower end of the inner ring of the conversion member 50 to install the bearing component 42 on the conversion member 50. When the conversion member 50 rotates, the conversion member 50 will drive the inner ring of the bearing component 42 to rotate. At this time, the bearing component 42 can support the second end of the conversion member 50.

[0115] In some examples, as shown in Figures 8 and 9, the side of the valve seat 12 facing away from the valve port 131 is a metal part, and bending this side of the valve seat 12 can form a second support member 111. The second support member 111 contacts and cooperates with the end of the bearing component 42 facing away from the valve port 131, and the second support member 111 cooperates with the outer ring of the bearing component 42. The first support member 511 contacts and cooperates with the side of the bearing component 42 facing the valve port 131, and the first support member 511 cooperates with the inner ring of the bearing component 42.

[0116] That is to say, the bearing component 42 is clamped between the first support member 511 and the second support member 111, and the bearing component 42 is fixed on the valve seat 12. When the conversion member 50 rotates, the conversion member 50 drives the inner ring of the bearing component 42 to rotate. At the same time, the bearing component 42 can support the rotation of the conversion member 50, thereby improving the stability of the rotation of the conversion member 50.

[0117] In some examples, as shown in Figures 8, 9, and 17, the valve seat 12 defines an installation cavity 115, and an anti-rotation member 30 is provided in the installation cavity 115. The anti-rotation member 30 cooperates with the valve needle assembly 20 to limit the rotational freedom of the valve needle assembly 20, so that the valve needle assembly 20 can only move back and forth but cannot rotate, thereby reducing the wear between the valve needle assembly 20 and the valve seat 12 when the valve needle assembly 20 opens or blocks the valve port 131.

[0118] Specifically, the anti-rotation component 30 and the bearing component 42 are both arranged in the installation cavity 115. The bearing component 42 is arranged on the side of the anti-rotation component 30 away from the valve port 131, that is, above the anti-rotation component 30. The bearing component 42 is sleeved on the conversion component 50. The conversion component 50 is provided with a first stop portion 515 and a first support component 511 arranged at intervals along the up and down directions. The anti-rotation component 30 has a protrusion 32 on the side facing the bearing component 42.

[0119] The upper end of the inner ring of the bearing component 42 is abutted against the first stop portion 515, and the lower end of the inner ring of the bearing component 42 is matched with the first support member 511 to fix the bearing component 42 and the conversion member 50 together. The upper end of the outer ring of the bearing component 42 is matched with the second support member 111, and the lower end of the outer ring of the bearing component 42 is abutted against the protrusion 32 to fix the outer ring of the bearing component 42 in the mounting cavity 115, so that when the valve needle assembly 20 moves back and forth, the valve needle assembly 20 will not drive the conversion member 50 to move back and forth together.

[0120] Specifically, when installing the bearing component 42, the bearing component 42 is first sleeved on the conversion component 50 so that the upper end of the inner ring of the bearing component 42 is abutted against the first stop portion 515, and then the third part 503 is bent so that the first support component 511 is matched with the lower end of the inner ring of the bearing component 42, and then the bearing component 42 is set in the installation cavity 115 so that the lower end of the outer ring of the bearing component 42 is abutted against the protrusion 32, and then the end of the valve seat 12 is bent so that the second support component 111 is abutted against the upper end of the outer ring of the bearing component 42. At this time, the anti-rotation component 30 and the second support component 111 limit the position of the bearing component 42 in the up and down directions to prevent the bearing component 42 from moving in the up and down directions with the valve needle assembly 20, so that the bearing component 42 can stably support the rotation of the conversion component 50.

[0121] Among them, when the lower end of the outer ring of the bearing component 42 is abutted against the protrusion 32 on the anti-rotation component 30, and the valve seat 12 is bent so that the second support component 111 is abutted against the upper end of the outer ring of the bearing component 42, the second support component 111 has a downward extrusion force on the bearing component 42. At this time, the bearing component 42 has a downward extrusion force on the anti-rotation component 30, so that the lower end of the anti-rotation component 30 is matched with the bottom wall of the installation cavity 115, and then the position of the anti-rotation component 30 in the installation cavity 115 is limited to fix the anti-rotation component 30 in the installation cavity 115, so as to prevent the anti-rotation component 30 from rotating in the installation cavity 115, thereby ensuring the stability of the cooperation between the anti-rotation component 30 and the valve needle assembly 20, so that the anti-rotation component 30 can limit the rotation of the valve needle assembly 20.

[0122] In some embodiments of the present application, as shown in Figure 6, the electronic expansion valve 1 also includes an anti-rotation component 30, which is arranged on the side of the conversion component 50 facing the valve port 131. The anti-rotation component 30 cooperates with the valve needle assembly 20 to limit the rotational freedom of the valve needle assembly 20. When the conversion component 50 rotates, the valve needle assembly 20 can only move but not rotate, so that when the valve needle assembly 20 opens or blocks the valve port 131, the friction between the valve needle assembly 20 and the valve seat 12 can be reduced, which is convenient for reducing the noise generated in the electronic expansion valve 1, reducing the degree of mutual wear between the valve needle assembly 20 and the valve seat 12, and facilitating improving the service life of the valve needle assembly 20 and improving the service life of the electronic expansion valve 1.

[0123] In some embodiments, the anti-rotation member 30 cooperates with the valve stem 21 to limit the rotational freedom of the valve stem 21 so that the valve stem 21 can only move back and forth but cannot rotate, and the valve stem 21 will only drive the valve needle 22 to move back and forth but not to rotate, so as to reduce the wear between the valve needle 22 and the valve port 121 when the valve needle 22 opens or closes the valve port 121.

[0124] In other embodiments, the anti-rotation component 30 cooperates with the valve needle 22, so that even if the valve stem 21 rotates, under the restriction of the anti-rotation component 30, the valve needle 22 will only move back and forth and will not rotate, so as to reduce the wear between the valve needle 22 and the valve port 121 when the valve needle 22 opens or closes the valve port 121.

[0125] In some optional embodiments of the present application, the valve needle assembly 20 further includes a guide sleeve 41, which is fixed to the valve stem 21. The guide sleeve 41 is formed into a non-circular shape along the radial cross-section of the valve needle assembly 20. The outer peripheral wall of the guide sleeve 41 is suitable for cooperating with the anti-rotation part 30 to limit the rotational freedom of the guide sleeve 41, thereby limiting the rotation of the valve needle assembly 20, so that the valve needle assembly 20 can only move but not rotate, so as to reduce the friction between the valve needle assembly 20 and the valve seat 12 when the valve needle assembly 20 opens or blocks the valve port 131.

[0126] In some embodiments, the anti-rotation member 30 defines a cavity 31 , the radial cross-section of the cavity 31 is formed to be non-circular, and the guide sleeve 41 is formed to be shaped to match the cavity 31 . When the valve needle assembly 20 has a tendency to rotate, the inner circumferential wall of the cavity 31 exerts a rotation-stopping force on the guide sleeve 41 , thereby limiting the rotational freedom of the valve needle assembly 20 .

[0127] In some examples, the anti-rotation member 30 and the valve seat 12 are integrated, which reduces the number of installation steps for fixing the anti-rotation member 30 to the valve seat 12 , and the rotation of the valve needle assembly 20 is limited by the cooperation between the anti-rotation member 30 and the guide sleeve 41 .

[0128] In some examples, the guide sleeve 41 and the valve needle assembly 20 are integrated, which reduces the installation steps of fixing the guide sleeve 41 to the valve needle assembly 20, and the rotation of the part of the valve needle assembly 20 that cooperates with the valve port 121 is restricted by the cooperation of the anti-rotation part 30 and the guide sleeve 41.

[0129] In some embodiments, the outer peripheral wall of the guide sleeve 41 is formed into an oblong shape, the anti-rotation part 30 defines a cavity 31, and the inner wall of at least a portion of the cavity 31 in the anti-rotation part 30 is formed into an oblong shape to cooperate with the guide sleeve 41 to prevent rotation. When the guide sleeve 41 has a tendency to rotate, the inner wall of the cavity 31 has a stopping force on the outer peripheral wall of the guide sleeve 41 to limit the rotation of the guide sleeve 41, so that the guide sleeve 41 can only move back and forth in the cavity 31 but cannot rotate, so that the valve stem 21 and the valve needle 22 can only move back and forth but cannot rotate, and then when the valve stem 21 and the valve needle 22 move back and forth to open or block the valve port 131, the friction between the valve needle 22 and the valve seat 12 can be reduced, thereby reducing the wear between the valve needle 22 and the valve seat 12.

[0130] In some embodiments, the inner wall of the cavity 31 slides with the outer wall of the guide sleeve 41. When the valve stem 21 and the valve needle 22 move back and forth, the inner wall of the cavity 31 can guide the moving direction of the guide sleeve 41, so that the guide sleeve 41 can move back and forth smoothly in the cavity 31, and the valve needle 22 can smoothly open or block the valve port 131.

[0131] In some examples, the outer peripheral wall of the guide sleeve 41 can be formed into a triangle, square, hexagon, etc., and at least a portion of the inner wall of the cavity 31 in the anti-rotation component 30 is correspondingly formed into a triangle, square, hexagon, etc. to cooperate with the guide sleeve 41 to prevent rotation.

[0132] In other examples, the outer peripheral wall of the guide sleeve 41 is provided with one of a guide groove and a guide protrusion, and the inner wall of the cavity 31 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 that the moving direction of the guide sleeve 41 is guided by the cooperation of the guide protrusion and the guide groove. At the same time, when the guide sleeve 41 has a tendency to rotate, the rotation of the guide sleeve 41 is restricted by the cooperation of the guide protrusion and the guide groove, thereby restricting the rotation of the valve stem 21 and the valve needle 22.

[0133] For example, the outer wall of the guide sleeve 41 is provided with a guide groove, and the inner wall of the cavity 31 is provided with a guide protrusion. The guide groove and the guide protrusion both extend in the up and down directions. When the valve stem 21 and the valve needle 22 move in the up and down directions, the guide groove slides up and down, and the guide protrusion slides in the up and down directions in the guide groove to limit the moving direction of the guide sleeve 41, and then limit the moving direction of the valve stem 21 and the valve needle 22, so that the valve stem 21 and the valve needle 22 can move back and forth smoothly, and then the valve needle 22 can smoothly open or block the valve port 131.

[0134] At the same time, when the valve stem 21 and the valve needle 22 have a tendency to rotate, since the guide protrusion extends into the guide groove and the anti-rotation part 30 is fixed on the valve seat 12, the side wall of the guide groove has a stopping force on the guide protrusion to limit the rotation of the guide sleeve 41, so that the guide sleeve 41 and the valve needle 22 can only move back and forth up and down and cannot rotate, and then when the valve needle 22 moves back and forth and when the valve needle 22 opens or blocks the valve port 131, the friction between the valve needle 22 and the valve seat 12 can be reduced, thereby reducing the wear between the valve needle 22 and the valve seat 12, and at the same time, it is convenient to reduce the noise generated in the electronic expansion valve 1.

[0135] In some embodiments, as shown in Figure 24, a guide sleeve 41 is sleeved on the valve stem 21, and the guide sleeve 41 is sleeved on the end of the valve stem 21 facing the valve port 131. The guide sleeve 41 cooperates with the anti-rotation component 30 to limit the rotational freedom of the guide sleeve 41, thereby limiting the rotational freedom of the valve stem 21 and the valve needle 22. When the conversion component 50 rotates, the valve stem 21 and the valve needle 22 can only move but not rotate, so as to reduce the friction between the valve needle 22 and the valve seat 12 when the valve needle 22 opens or blocks the valve port 131.

[0136] In some examples, the rotating assembly includes a conversion member 50 and a rotor member 60, the rotor member 60 cooperates with the conversion member 50 to drive the conversion member 50 to rotate, and the conversion member 50 is threadedly cooperated with the valve stem 21 so that the rotation of the conversion member 50 is converted into the reciprocating movement of the valve needle assembly 20. When the conversion member 50 rotates to drive the valve stem 21 to move back and forth, when the valve stem 21 has a tendency to rotate, the rotational freedom of the valve stem 21 can be restricted by the cooperation of the guide sleeve 41 and the anti-rotation member 30, so that the valve stem 21 and the valve needle 22 can only move back and forth but cannot rotate, and then when the valve needle 22 opens or blocks the valve port 131, the friction between the valve needle 22 and the valve seat 12 is reduced, and the degree of mutual wear between the valve needle 22 and the valve seat 12 is reduced, which facilitates to increase the service life of the valve needle 22 and the service life of the electronic expansion valve 1.

[0137] In some specific embodiments of the present application, as shown in Figures 24 and 25, the outer peripheral wall of the valve stem 21 has a first step surface 212, and the first step surface 212 is used to support the guide sleeve 41 to limit the position of the guide sleeve 41 to prevent the guide sleeve 41 from falling off the valve stem 21.

[0138] In some embodiments, as shown in Figure 25, the outer peripheral wall of the valve stem 21 is provided with a guide bevel 211, and the guide bevel 211 extends obliquely toward the first step surface 212 for guiding the installation of the guide sleeve 41, so that the guide sleeve 41 can be smoothly put on the valve stem 21, and the guide sleeve 41 is located between the guide bevel 211 and the first step surface 212 to limit the position of the guide sleeve 41 on the valve stem 21. When the valve stem 21 moves back and forth, the valve stem 21 can drive the guide sleeve 41 to move back and forth, and then the rotation of the valve stem 21 and the valve needle 22 is restricted by the cooperation of the guide sleeve 41 and the anti-rotation part 30.

[0139] In some embodiments, as shown in FIG25 , the valve stem 21 has a first cylindrical portion 213, which is located between the guide slope 211 and the first stepped surface 212. The guide sleeve 41 is externally mounted on the first cylindrical portion 213, and the guide sleeve 41 has an interference fit with the first cylindrical portion 213. When the guide sleeve 41 is externally mounted on the valve stem 21, the guide slope 211 can guide the installation of the guide sleeve 41, so that the guide sleeve 41 is smoothly mounted on the first cylindrical portion 213, and the guide sleeve 41 and the first cylindrical portion 213 are smoothly mated.

[0140] After the guide sleeve 41 is sleeved on the first cylindrical portion 213 , one end of the guide sleeve 41 is engaged with the first step surface 212 to limit the position of the guide sleeve 41 on the valve stem 21 and prevent the guide sleeve 41 from falling off the valve stem 21 .

[0141] In some specific embodiments of the present application, as shown in Figures 24 and 25, the valve needle assembly 20 also includes a valve sleeve 23, which is externally mounted on the valve stem 21. The valve sleeve 23 is fixedly fitted with the valve needle 22, and the valve sleeve 23 can move relative to the valve stem 21. The end of the valve stem 21 close to the valve port 131 extends into the accommodating chamber 221 and can move a certain distance in the accommodating chamber 221 to compress the first elastic member 44 in the accommodating chamber 221, so that the first elastic member 44 exerts a force on the valve needle 22 toward the valve port 131, so that the valve needle 22 can fully block the valve port 131.

[0142] In some embodiments, as shown in Figure 25, a second cylindrical portion 214 and a second step surface 215 are provided on the valve stem 21, and the valve sleeve 23 is sleeved on the second cylindrical portion 214. In the up and down directions, the valve sleeve 23 can move relative to the second cylindrical portion 214 along the up and down directions. The second step surface 215 is suitable for abutting with the lower end of the valve sleeve 23, and the guide sleeve 41 is suitable for abutting with the upper end of the valve sleeve 23.

[0143] When the valve stem 21 and the guide sleeve 41 move downward relative to the valve sleeve 23 and the valve needle 22, the guide sleeve 41 and the upper end of the valve sleeve 23 are stopped and engaged. At this time, the valve stem 21 can drive the valve needle 22 to move downward so that the valve needle 22 can block the valve port. At the same time, the valve stem 21 compresses the first elastic member 44 in the accommodating chamber 221, so that the first elastic member 44 has a force on the valve needle 22 toward the valve port 131, so that the valve needle 22 can fully block the valve port 131.

[0144] Specifically, by making the guide sleeve 41 and the upper end of the valve sleeve 23 stop fit, the length of the valve stem 21 extending into the accommodating cavity 221 is controlled, thereby controlling the compression amount of the valve stem 21 on the first elastic member 44 to avoid failure of the first elastic member 44.

[0145] When the valve stem 21 and the guide sleeve 41 move upward relative to the valve sleeve 23 and the valve needle 22, the valve sleeve 23 and the second step surface 215 are engaged with each other to drive the valve sleeve 23 to move upward and drive the valve needle 22 to move upward, so that the valve needle 22 can smoothly open the valve port 131.

[0146] In some optional embodiments of the present application, as shown in Figure 6, the bearing component 42 is supported on the anti-rotation component 30, so that the position of the anti-rotation component 30 is limited by the bearing component 42, so as to fix the anti-rotation component 30 on the valve seat 12, so that the anti-rotation component 30 can limit the rotation of the valve needle assembly 20.

[0147] In some examples, as shown in Figures 8, 9, and 17, the valve seat 12 defines an installation cavity 115, the anti-rotation component 30 and the bearing component 42 are both arranged in the installation cavity 115, the bearing component 42 is arranged on the side of the anti-rotation component 30 away from the valve port 131, that is, above the anti-rotation component 30, the bearing component 42 is sleeved on the conversion component 50, and the conversion component 50 is provided with a first stop portion 515 and a first support member 511 spaced apart in the up and down directions, and the anti-rotation component 30 has a protrusion 32 on the side facing the bearing component 42.

[0148] The upper end of the inner ring of the bearing component 42 is abutted against the first stop portion 515, and the lower end of the inner ring of the bearing component 42 is matched with the first support member 511 to fix the bearing component 42 and the conversion member 50 together. The upper end of the outer ring of the bearing component 42 is matched with the second support member 111, and the lower end of the outer ring of the bearing component 42 is abutted against the protrusion 32 to fix the outer ring of the bearing component 42 in the mounting cavity 115, so that when the valve needle assembly 20 moves back and forth, the valve needle assembly 20 will not drive the conversion member 50 to move back and forth together.

[0149] Specifically, when installing the bearing component 42, the bearing component 42 is first sleeved on the conversion component 50 so that the upper end of the inner ring of the bearing component 42 is abutted against the first stop portion 515, and then the third part 503 is bent so that the first support component 511 is matched with the lower end of the inner ring of the bearing component 42, and then the bearing component 42 is set in the installation cavity 115 so that the lower end of the outer ring of the bearing component 42 is abutted against the protrusion 32, and then the end of the valve seat 12 is bent so that the second support component 111 is abutted against the upper end of the outer ring of the bearing component 42. At this time, the anti-rotation component 30 and the second support component 111 limit the position of the bearing component 42 in the up and down directions to prevent the bearing component 42 from moving in the up and down directions with the valve needle assembly 20, so that the bearing component 42 can stably support the rotation of the conversion component 50.

[0150] Among them, when the lower end of the outer ring of the bearing component 42 is abutted against the protrusion 32 on the anti-rotation component 30, and the valve seat 12 is bent so that the second support component 111 is abutted against the upper end of the outer ring of the bearing component 42, the second support component 111 has a downward extrusion force on the bearing component 42. At this time, the bearing component 42 has a downward extrusion force on the anti-rotation component 30, so that the lower end of the anti-rotation component 30 is matched with the bottom wall of the installation cavity 115, and then the position of the anti-rotation component 30 in the installation cavity 115 is limited to fix the anti-rotation component 30 in the installation cavity 115, so as to prevent the anti-rotation component 30 from rotating in the installation cavity 115, thereby ensuring the stability of the cooperation between the anti-rotation component 30 and the valve needle assembly 20, so that the anti-rotation component 30 can limit the rotation of the valve needle assembly 20.

[0151] In some embodiments of the present application, as shown in Figure 6, the valve needle assembly 20 stops at the valve seat 12 to block the valve port 131. The peripheral wall of the valve seat 12 is provided with a flow channel 121. The liquid can flow into the valve seat 12 through the flow channel 121 on the peripheral wall of the valve seat 12, and then flow out from the valve port 131.

[0152] In some embodiments, a plurality of flow openings 121 are provided on the peripheral wall of the valve seat 12, and the plurality of flow openings 121 are arranged at intervals along the circumference of the valve seat 12 so that external liquid can enter the valve seat 12 evenly from the plurality of flow openings 121, thereby facilitating an increase in the liquid inlet amount of the electronic expansion valve 1 and an increase in the flow rate of the electronic expansion valve 1.

[0153] The integrated valve 8 according to an embodiment of the present application is described below. The integrated valve 8 according to the embodiment of the present application includes the electronic expansion valve 1 according to the above embodiment of the present application.

[0154] According to the integrated valve 8 of the embodiment of the present application, by utilizing the electronic expansion valve 1 according to the above-mentioned embodiment of the present application, a first elastic member 44 is arranged between the valve stem 21 and the valve needle 22, so that the first elastic member 44 applies a force toward the valve port 131 to the valve needle 22, so as to increase the stopping force between the valve needle 22 and the valve seat 12 when the valve needle 22 blocks the valve port 131, so that the valve needle 22 can fit tightly with the valve seat 12 to fully block the valve port 131, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve 1.

[0155] In some embodiments of the present application, the integrated valve 8 also includes a valve plate 70, which is provided with an assembly cavity 73, a first flow channel 71 and a second flow channel 72. The first flow channel 71 is connected to the assembly cavity 73 through a first opening, and the second flow channel 72 is connected to the assembly cavity 73 through a second opening. The electronic expansion valve 1 is installed in the assembly cavity 73, the valve port 131 is connected to the second opening, and the flow channel port 121 provided on the valve seat 12 is connected to the first opening. The external liquid flows along the first flow channel 71 from the first opening through the flow channel port 121 and into the valve seat 12. The liquid in the valve seat 12 enters the second flow channel 72 from the first opening through the valve port 131.

[0156] In some embodiments, as shown in Figure 28, the first opening is set toward the channel opening 121 so that the liquid in the first channel 71 can smoothly pass through the channel opening 121 into the valve seat 12, and the second opening is set toward the valve opening 131 so that the liquid in the valve seat 12 can smoothly enter the second channel 72 through the second opening.

[0157] In some embodiments of the present application, as shown in Figure 28, the minimum flow area of ​​the first opening is D1, the minimum flow area of ​​the flow channel 121 is D2, the minimum flow area of ​​the valve port 131 is D3, and the minimum flow area of ​​the second opening is D4, where D4>D1>2D2>4D3 is satisfied to throttle and reduce the pressure of the liquid.

[0158] Specifically, the liquid passes through the first opening, the flow channel opening 121, the valve opening 131 and the second opening in sequence, so that the flow areas of the first opening, the flow channel opening 121, the valve opening 131 and the second opening are gradually reduced, so as to gradually throttle and reduce the pressure of the liquid.

[0159] 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 or the integrated valve 8 according to the above-mentioned embodiment of the present application.

[0160] 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, a first elastic member 44 is arranged between the valve stem 21 and the valve needle 22, so that the first elastic member 44 applies a force toward the valve port 131 to the valve needle 22, so as to increase the stopping force between the valve needle 22 and the valve seat 12 when the valve needle 22 blocks the valve port 131, so that the valve needle 22 can fit tightly with the valve seat 12 to fully block the valve port 131, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve 1.

[0161] A vehicle 91 according to an embodiment of the present application will be described below with reference to FIG 29. 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.

[0162] 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, a first elastic member 44 is set between the valve stem 21 and the valve needle 22, so that the first elastic member 44 applies a force toward the valve port 131 to the valve needle 22, so as to increase the stopping force between the valve needle 22 and the valve seat 12 when the valve needle 22 blocks the valve port 131, so that the valve needle 22 can fit tightly with the valve seat 12 to fully block the valve port 131, thereby facilitating reducing the possibility of internal leakage of the electronic expansion valve 1.

[0163] 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.

[0164] 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.

[0165] 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, wherein the valve seat is provided with a valve port; A rotating assembly, the rotating assembly rotates relative to the valve seat; A valve needle assembly, the valve needle assembly comprising a valve stem and a valve needle, the valve stem cooperates with the rotating assembly so that the rotation of the rotating assembly is converted into a reciprocating movement of the valve stem, the valve stem does not rotate around its axial direction, and the valve needle is used to open or block the valve port; a first elastic member, wherein the first elastic member is connected to the valve stem and the valve needle respectively, and the valve needle is driven by the valve stem to reciprocate; When the valve needle blocks the valve port, the valve stem can move toward the valve port to compress the first elastic member to form a pre-tightening force.

2. The electronic expansion valve according to claim 1, wherein: An accommodating cavity is provided in the valve needle, the first elastic member is installed in the accommodating cavity, and the first elastic member is respectively connected to the valve stem and the valve needle to apply a force to the valve needle toward the valve port.

3. The electronic expansion valve according to claim 1 or 2, wherein: The utility model also comprises a sleeve, wherein the sleeve is fixed to the valve seat, and the rotating assembly is rotatably disposed in the sleeve.

4. The electronic expansion valve according to claim 3, wherein: A first matching piece is arranged in the sleeve, and the rotating assembly and the first matching piece are relatively rotatable. The rotating assembly and the first matching piece cooperate to radially limit the rotating assembly.

5. The electronic expansion valve according to claim 4, wherein: The rotating assembly is plug-fitted with the first matching piece.

6. The electronic expansion valve according to claim 5, wherein: An insertion groove is provided on the end surface of the first matching piece facing the rotating assembly, and the rotating assembly is inserted into the insertion groove.

7. The electronic expansion valve according to any one of claims 1 to 6, wherein: The rotating assembly comprises: a conversion member, the conversion member cooperating with the valve stem to convert the rotation of the conversion member into a reciprocating movement of the valve stem; A rotor component is matched with the first end of the conversion member to drive the conversion member to rotate.

8. The electronic expansion valve according to claim 7, wherein: The conversion member includes a first portion arranged at a first end, the first portion is a metal member, and the first portion is welded to the rotor member.

9. The electronic expansion valve according to claim 8, wherein: The conversion member further comprises a second part, the second part is fixed to the first part, the second part is a resin member, and the second part is threadably matched with the valve stem.

10. The electronic expansion valve according to any one of claims 7 to 9, wherein: The valve seat is provided with a bearing component, the second end of the conversion member cooperates with the bearing component, and the second end is opposite to the first end.

11. The electronic expansion valve according to claim 10, wherein: The conversion member comprises a third part, the third part is a metal member, the third part is provided with a first support member, and the bearing component is supported by the first support member.

12. The electronic expansion valve according to claim 11, wherein: A portion of the third portion is bent to form the first support member.

13. The electronic expansion valve according to any one of claims 7 to 12, wherein: It also includes an anti-rotation component, which is arranged on a side of the conversion component facing the valve port, and the anti-rotation component cooperates with the valve needle assembly to limit the rotational freedom of the valve needle assembly.

14. The electronic expansion valve according to claim 13, wherein: The valve needle assembly also includes a guide sleeve, which is fixed to the valve stem. The guide sleeve has a non-circular cross-section along the radial direction of the valve needle assembly, and the outer peripheral wall of the guide sleeve is suitable for cooperating with the anti-rotation part to limit the rotational freedom of the guide sleeve.

15. An integrated valve, wherein: include: An electronic expansion valve, wherein the electronic expansion valve is an electronic expansion valve according to any one of claims 1 to 14; A valve plate, wherein the valve plate is provided with an assembly cavity, a first flow channel and a second flow channel, wherein the first flow channel is communicated with the assembly cavity through a first opening, and the second flow channel is communicated with the assembly cavity through a second opening; The electronic expansion valve is mounted to the assembly cavity, the valve port is communicated with the second opening, and the flow channel port provided on the valve seat is communicated with the first opening.

16. The integrated valve according to claim 15, wherein: The minimum flow area of ​​the first opening is D1, the minimum flow area of ​​the flow channel opening is D2, the minimum flow area of ​​the valve opening is D3, and the minimum flow area of ​​the second opening is D4, wherein D4>D1>2D2>4D3 is satisfied.

17. A thermal management system, wherein: It comprises the electronic expansion valve according to any one of claims 1 to 14; or the integrated valve according to claim 15 or 16.

18. A vehicle, wherein: Comprising a thermal management system according to claim 17.

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