Electronic expansion valve, thermal management system, and vehicle

Abstract

The application discloses an electronic expansion valve, a thermal management system and a vehicle. The electronic expansion valve comprises a valve body assembly, a rotor assembly, a valve needle assembly, a displacement limiting mechanism and a rotation limiting mechanism. The valve body assembly forms a valve cavity and a valve port. The rotor assembly is installed in the valve cavity. The rotor assembly is threadedly connected with the valve needle assembly. The displacement limiting mechanism limits axial movement of the rotor assembly. The rotation limiting mechanism limits rotation of the valve needle assembly. When the rotor assembly rotates relative to the valve needle assembly, the valve needle assembly moves axially to adjust the opening degree of the valve port. The electronic expansion valve has compact structure and small space occupation.

Description

Technical Field

[0001] This application relates to the field of expansion valve technology, and more particularly to an electronic expansion valve, a thermal management system, and a vehicle. Background Technology

[0002] The electronic expansion valve includes a valve seat assembly, a valve needle assembly, and a drive assembly. The drive assembly includes a rotor and a drive shaft, with the rotor fixedly connected to the drive shaft. The other end of the drive shaft is connected to the valve needle assembly, and the drive shaft is threadedly connected to a nut. The rotor drives the drive shaft and nut to rotate, causing the drive shaft to push the valve needle assembly to move axially, thereby blocking or opening the outlet of the valve seat assembly. The fixed connection between the rotor and the drive shaft, with both moving along the upper axial limit of the drive shaft, results in a large axial space requirement for the drive assembly. Furthermore, the rotor's axial rotation necessitates a large magnetic field space, leading to high investment costs for the linear motor and resulting in complex assembly and high production costs for the expansion valve. Utility Model Content

[0003] This application provides an electronic expansion valve, a thermal management system, and a vehicle, which makes the electronic expansion valve compact and space-saving, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, an electronic expansion valve is provided, comprising:

[0005] The valve body assembly forms the valve cavity and valve port;

[0006] Rotor assembly, installed within the valve chamber;

[0007] A valve needle assembly, wherein the rotor assembly is threadedly connected to the valve needle assembly;

[0008] An anti-displacement mechanism restricts the axial movement of the rotor assembly;

[0009] An anti-rotation mechanism restricts the rotation of the valve needle assembly;

[0010] When the rotor assembly rotates relative to the valve needle assembly, the valve needle assembly moves along the axial direction to adjust the opening of the valve port.

[0011] Optionally, the rotor assembly includes a rotor and an adapter, the rotor is sleeved on the adapter, the rotor is fixedly connected to the adapter, and the adapter is threadedly connected to the valve needle assembly.

[0012] Optionally, the anti-shift mechanism is connected between the adapter and the valve body assembly to restrict the rotor and the adapter from moving axially.

[0013] Optionally, the adapter is a sleeve structure, and the valve needle assembly is at least partially inserted into the adapter.

[0014] Optionally, the rotor assembly further includes a connector connected between the rotor and the adapter, the connector extending partially out of the adapter, and the anti-shift mechanism connected between the connector and the valve body assembly.

[0015] Optionally, the anti-shift mechanism includes a limiting sleeve, which is fixedly connected to the valve body assembly, and the connecting member is rotatably connected to the limiting sleeve.

[0016] Optionally, the anti-shift mechanism further includes a transition bearing, which is connected between the connecting member and the limiting sleeve. The outer ring of the transition bearing is fixedly connected to the connecting member, and the inner ring of the transition bearing is fixedly connected to the limiting sleeve.

[0017] Optionally, the anti-shift mechanism includes a friction-reducing component, which is rotatably connected between the connecting member and the limiting sleeve.

[0018] Optionally, the anti-shift mechanism further includes an elastic support member, which is installed on the side of the adapter member away from the friction-reducing member. One end of the elastic support member is fixed, and the other end is connected to the adapter member. Under the action of the elastic restoring force of the elastic support member, the adapter member abuts against the friction-reducing member.

[0019] Optionally, the anti-shift mechanism further includes a fixed seat, which is fixedly connected to the valve body assembly. The end of the adapter opposite to the connector is rotatably connected to the fixed seat, and the valve needle assembly passes through and is guided to engage with the fixed seat.

[0020] Optionally, the anti-displacement mechanism includes a limiting bearing, which is connected between the end of the rotor near the valve port and the housing. The outer ring of the limiting bearing is fixedly connected to the housing, and the inner ring of the limiting bearing is fixedly connected to the end of the rotor.

[0021] Optionally, the rotor assembly further includes an adjustment mechanism connected to the fixed base. The adjustment mechanism is sleeved on the adapter and connected to the adapter, and is adapted to limit the number of rotations of the adapter.

[0022] Optionally, the rotor assembly further includes an adjustment mechanism, which is fixedly disposed relative to the valve body assembly. The adjustment mechanism is sleeved on the adapter and connected to the adapter, and is adapted to limit the number of rotations of the adapter.

[0023] Optionally, the adjustment mechanism includes a guide and an adjustment member. The guide is sleeved on the adapter and fixedly connected to the fixed seat. The guide forms a sliding groove spirally arranged along the axial direction of the adapter. The adjustment member is installed in the sliding groove. The guide is connected to the fixed seat, and the adjustment member is connected to the adapter. The adapter drives the adjustment member to move between a first position and a second position within the sliding groove.

[0024] Optionally, the guide includes a first spring, the gap between the coils of the first spring forming the groove, and the adjusting member is connected to the first spring.

[0025] Optionally, the adjusting member includes a second spring, which is sleeved on the adapter. The second spring is nested with the first spring, and each coil of the second spring is located within the groove.

[0026] Optionally, the number of turns of the second spring is less than the number of turns of the first spring.

[0027] Optionally, one end of the second spring is provided with a hook, which extends toward the adapter. The surface of the adapter is provided with a protrusion that extends axially and is adapted to drive the hook to move the second spring along the groove.

[0028] Optionally, the surface of the adapter is provided with a plurality of protrusions, which are spaced apart along the axial direction of the adapter, and the protrusions are related to the first spring.

[0029] Optionally, the first spring has limiting portions at both ends, with the limiting portion near the fixed base being fixedly connected to the fixed base, and the limiting portion at the other end being used to abut against the second spring.

[0030] Optionally, the connector includes a first connecting sub-part and a second connecting sub-part that are fixedly connected. The first connecting sub-part is fixedly connected to the rotor, and the second connecting sub-part is fixedly connected to the adapter. The anti-shift mechanism is connected between the second connecting sub-part and the valve body assembly.

[0031] Optionally, both the first connecting sub-part and the second connecting sub-part include a cylindrical part and an extension part. The extension part of the first connecting sub-part extends from the end of the cylindrical part into the rotor and is fixedly connected to the rotor. The extension part of the second connecting sub-part extends from the end of the cylindrical part into the adapter and is fixedly connected to the adapter. The cylindrical part of the first connecting sub-part is sleeved on the cylindrical part of the second connecting sub-part, and the cylindrical part is sleeved on the anti-shift mechanism.

[0032] Optionally, the anti-rotation mechanism includes an anti-rotation component and an anti-rotation mating component. The anti-rotation component is located between the limiting sleeve and the valve needle assembly. The anti-rotation component is fixedly connected to the limiting sleeve. The anti-rotation mating component is provided on the valve needle assembly. The anti-rotation component and the anti-rotation mating component are slidably connected along the axial direction to restrict the rotation of the valve needle assembly.

[0033] Optionally, the anti-rotation component includes a slider, the anti-rotation mating component includes an anti-rotation groove extending axially, the slider is fixedly connected to the limiting sleeve, and the slider is slidably installed in the anti-rotation groove.

[0034] Optionally, the valve needle assembly includes a screw and a valve needle, the valve needle being mounted on one end of the screw, the screw having a threaded section, and an anti-rotation groove being formed on the screw, the anti-rotation groove being located between the threaded section and the other end of the screw.

[0035] Optionally, the valve body assembly further includes an end cap and a housing, the end of the housing having an opening, the end of the valve needle assembly being aligned with the opening, the end cap covering the opening, and the end cap being detachably and fixedly connected to the housing.

[0036] Optionally, the end cap is located at the end of the anti-rotation mechanism, and the anti-rotation mechanism is fixedly connected to the end cap.

[0037] According to a second aspect of this application, a thermal management system is provided, including the electronic expansion valve described in any one of the preceding claims.

[0038] According to a third aspect of this application, a vehicle is also provided, including the thermal management system described above.

[0039] The electronic expansion valve, thermal management system, and vehicle of this application embodiment are rotatably connected between the valve body assembly and the valve needle assembly via a rotor assembly. The rotor assembly and the valve needle assembly are threadedly connected. As the rotor assembly rotates, it drives the valve needle assembly to move axially along the electronic expansion valve. Simultaneously, a stop mechanism restricts the axial movement of the rotor assembly, and an anti-rotation mechanism restricts the rotation of the valve needle assembly. This ensures that the rotor assembly only performs rotational motion, while the valve needle assembly only performs linear motion. The valve body assembly does not need to provide axial movement space for the rotor assembly, reducing the axial space of the electronic expansion valve, thus reducing its volume and cost.

[0040] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0043] Figure 1 This is an axial sectional view of a first embodiment of the electronic expansion valve provided in the exemplary embodiments of this disclosure;

[0044] Figure 2 This is a cross-sectional view of the rotating assembly of the electronic expansion valve provided in an exemplary embodiment of this disclosure;

[0045] Figure 3 This is a cross-sectional view of the housing of the electronic expansion valve provided in an exemplary embodiment of this disclosure;

[0046] Figure 4 This is a partial perspective view of the rotating assembly of the electronic expansion valve provided in an exemplary embodiment of this disclosure;

[0047] Figure 5 yes Figure 4 An explosion diagram;

[0048] Figure 6 This is an exploded view of the end cap, anti-rotation mechanism, and screw of the electronic expansion valve provided in an exemplary embodiment of this disclosure;

[0049] Figure 7 This is an axial sectional view of a second embodiment of the electronic expansion valve provided in the exemplary embodiments of this disclosure.

[0050] Figure 8 yes Figure 7 A three-dimensional sectional view of the electronic expansion valve after the rotor has been removed;

[0051] Figure 9 yes Figure 7 A three-dimensional schematic diagram of the electronic expansion valve after the rotor has been removed.

[0052] Figure 10 This is a schematic diagram of a side vehicle provided in an exemplary embodiment of this disclosure.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Electronic expansion valve;

[0055] 200, Valve body assembly; 210, Housing; 211, Opening; 220, Valve seat; 221, Valve core seat; 222, Valve port seat; 230, Valve body; 240, End cap; 250, Valve port; 260, Valve cavity;

[0056] 300, Rotor assembly; 310, Rotor; 320, Adapter; 321, Sleeve; 322, Protrusion; 330, Connector; 331, First connecting part; 332, Second connecting part; 333, Cylindrical part; 334, Extension; 340, Adjusting mechanism; 341, Guide; 342, First spring; 343, Slide groove; 344, Limiting part; 345, Second spring; 346, Hook; 347, Adjusting part;

[0057] 400, Valve needle assembly; 410, Screw; 411, Threaded section; 420, Valve needle; 430, Valve needle spring; 440, Spring groove; 450, Valve core; 460, Valve needle sleeve;

[0058] 500, Anti-slip mechanism; 510, Limiting sleeve; 520, Adapter bearing; 521, Outer ring; 522, Inner ring; 530, Friction reducing component; 531, First friction reducing part; 532, Second friction reducing part; 540, Elastic support component; 550, Fixed seat; 560, Spring bracket;

[0059] 600 Anti-rotation mechanism; 610 Anti-rotation component; 611 Slider; 620 Anti-rotation mating component; 621 Anti-rotation groove;

[0060] 10. Vehicles. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0062] See Figure 1 , Figure 7 , Figure 8 and Figure 9This application provides an electronic expansion valve 100, including a valve body assembly 200, a rotor assembly 300, a valve needle assembly 400, a stop mechanism 500, and a stop mechanism 600. The valve body assembly 200 has a valve cavity 260 and a valve port 250. The rotor assembly 300 is installed within the valve cavity 260 of the valve body assembly 200. The rotor assembly 300 is sleeved on the valve needle assembly 400 and rotatably connected between the valve body assembly 200 and the valve needle assembly 400. The rotor assembly 300 is threadedly connected to the valve needle assembly 400 and drives the valve needle assembly 400 to move axially, thereby opening or closing the valve port 250 on the valve body assembly 200. The stop mechanism 500 is connected between the valve body assembly 200 and the rotor assembly 300 to restrict the axial movement of the rotor assembly 300. An anti-rotation mechanism 600 is connected between the valve body assembly 200 and the valve needle assembly 400 to restrict the rotation of the valve needle assembly 400. The anti-movement mechanism 500 and the anti-rotation mechanism 600 cause the valve needle assembly 400 to move axially to adjust the opening of the valve port 250 when the rotor assembly 300 rotates relative to the valve needle assembly 400.

[0063] In this embodiment, the rotor assembly 300 is rotatably connected between the valve body assembly 200 and the valve needle assembly 400. The rotor assembly 300 and the valve needle assembly 400 are threadedly connected. As the rotor assembly 300 rotates, it drives the valve needle assembly 400 to move axially along the electronic expansion valve 100. Simultaneously, the anti-movement mechanism 500 restricts the axial movement of the rotor assembly 300, and the anti-rotation mechanism 600 restricts the rotation of the valve needle assembly 400. This ensures that the rotor assembly 300 only performs rotational motion, and the valve needle assembly 400 only performs linear motion. The valve body assembly 200 does not need to provide axial movement space for the rotor assembly 300, reducing the axial space of the electronic expansion valve 100 and its volume, which is beneficial for miniaturizing the electronic expansion valve 100.

[0064] In some embodiments, see Figure 1 The valve body assembly 200 includes a housing 210, a valve body 230, and a valve seat 220. The valve body 230 is connected between the housing 210 and the valve seat 220, forming a valve cavity 260 with the housing 210. A rotor assembly 300 is installed within the valve cavity 260, and a valve needle assembly 400 is partially located within the valve cavity 260, with a portion of the valve needle assembly 400 passing through the valve body 230 and entering the valve seat 220. The valve body assembly 200 has a valve port 250. The rotor assembly 300 drives the valve needle assembly 400 to move closer to or away from the valve assembly to adjust the opening degree of the valve port 250. The structure of the valve body assembly 200 is not entirely the same for different types of electronic expansion valves 100, but generally includes a housing 210, a valve body 230, and a valve seat 220.

[0065] For example, see Figure 1The valve seat 220 also includes a valve core seat 221 and a valve port seat 222. The side of the valve body 230 away from the housing 210 is sealed to the valve core seat 221, and the valve port seat 222 is sealed to the side of the valve core seat 221 away from the valve body 230. A valve port 250 is provided on the valve port seat 222. The valve body 230, valve core seat 221, and valve port seat 222 are coaxially arranged. Correspondingly, the valve needle assembly 400 includes a screw 410, a valve needle 420, and a valve core 450. The valve core 450 is installed in the valve core seat 221. The valve needle 420 is provided at the end of the screw 410 and is connected to the valve core 450. The rotor assembly 300 drives the screw 410 to move axially. The screw 410 drives the valve needle 420, and the valve needle 420 drives the valve core 450 to move within the valve core seat 221 to move closer to or further away from the valve seat 222, thereby adjusting the opening degree of the valve port 250 on the valve seat 222.

[0066] For example, see Figure 7 The valve needle assembly 400 includes a screw 410, a valve needle 420, and a valve needle sleeve 460. The valve needle sleeve 460 is connected between the valve body 230 and the valve seat 220, and the valve seat 220 is provided with a valve port 250. The valve needle 420 is provided at the end of the screw 410 and is disposed inside the valve needle sleeve 460. The rotor assembly 300 drives the screw 410 to move axially, and the screw 410 drives the valve needle 420 to move within the valve needle sleeve 460 to move closer to or further away from the valve seat 220, thereby adjusting the opening degree of the valve port 250 on the valve seat 220.

[0067] In some embodiments, see Figure 1 and Figure 6 The screw 410 and valve needle 420 of the valve needle assembly 400 are integrated into one structure, and the screw 410 and valve needle 420 are coaxially arranged. This effectively reduces the difficulty of assembly and maintenance of the valve needle assembly 400, and the structure is more compact and easier to process.

[0068] In some embodiments, see Figure 7 and Figure 8 The valve needle assembly 400 includes a screw 410 and a valve needle 420. A valve needle spring 430 is provided between the end of the screw 410 and the valve needle 420. A spring groove 440 for mounting the valve needle spring 430 is formed at the end of the valve needle 420 near the screw 410. The valve needle spring 430 is mounted in the spring groove, with one end abutting against the screw 410 and the other end abutting against the bottom of the spring groove 440. By providing the valve needle spring 430 for buffering, the probability of damage to the valve needle 420 or the valve needle 420 due to collision with the valve seat 220 is reduced.

[0069] The rotor assembly 300 will be described in detail below with reference to specific implementation methods.

[0070] In some embodiments, see Figure 1 , Figure 2 and Figure 7 The rotor assembly 300 includes a rotor 310 and an adapter 320. The rotor 310 is sleeved on the adapter 320, and the rotor 310 and the adapter 320 are fixedly connected. In some embodiments, the valve needle assembly 400 is threadedly connected to the adapter 320, and the adapter 320 is rotatably connected to the valve body assembly 200. A screw 410, such as that of the valve needle assembly 400, is threadedly connected to the adapter 320. The rotor 310 drives the adapter 320 to rotate, thereby causing the screw 410 of the valve needle assembly 400 to move axially, achieving an efficient conversion from rotational motion to axial movement. In some embodiments, an anti-shift mechanism 500 is connected between the adapter 320 and the valve seat 220 assembly to restrict the axial movement of the rotor 310 and the adapter 320. The anti-shift mechanism 500 can be directly or indirectly connected to the adapter 320.

[0071] Compared to related technologies where the rotor 310 rotates while moving axially to drive the valve needle assembly 400 shaft, the stator needs to provide a larger magnetic field for the rotor 310. In this embodiment, the axial position of the rotor 310 and the adapter 320 is limited by the anti-shift mechanism 500. The stator only needs to provide a magnetic field within a suitable range to drive the rotor 310, reducing the amount of stator material used and the cost of generating the magnetic field, thus achieving cost reduction while ensuring driving performance.

[0072] In some embodiments, see Figure 1 , Figure 2 , Figure 4 and Figure 5 The adapter 320 has a sleeve structure, and the valve needle assembly 400 is at least partially inserted inside the adapter 320. The adapter 320 is fixedly connected to the rotor 310, and the anti-displacement mechanism 500 connects the adapter 320 and the valve seat 220 assembly. The adapter 320 is threadedly connected to the valve needle assembly 400.

[0073] For example, see Figure 1 , Figure 2 and Figure 4 The adapter 320 is a sleeve 321, which has an axially extending channel. The screw 410 of the valve needle assembly 400 passes axially through the sleeve 321. The inner surface of the sleeve 321 has an internal thread, and the outer surface of the screw 410 of the valve needle assembly 400 has an external thread. The sleeve 321 and the screw 410 form a helical drive pair through threaded engagement. When the sleeve 321 rotates synchronously with the rotor 310, the axial movement of the sleeve 321 is restricted by the anti-movement mechanism 500. Under the action of the threaded engagement force, the screw 410 generates a linear displacement along the axial direction, thereby driving the valve needle 420 to precisely adjust its relative position with the valve seat 220, thereby controlling the opening degree of the valve port 250.

[0074] In this embodiment, the sleeve 321 is fitted onto and wraps around the screw 410, providing radial support for the screw 410. This counteracts radial wobble during axial movement of the screw 410, preventing wear or jamming at the thread engagement due to uneven loading. The nested structure of the sleeve 321 and the screw 410 reduces the radial space required, making the rotor assembly 300 compact and facilitating the miniaturization of the electronic expansion valve 100. The sleeve 321 and the screw 410 are machined and assembled separately, reducing machining difficulty. If wear occurs in the threaded pair, the components can be replaced individually, reducing maintenance costs.

[0075] In some embodiments, see Figure 1 , Figure 2 and Figure 7 The rotor assembly 300 also includes a connector 330, which is connected between the rotor 310 and the adapter 320. A portion of the connector 330 extends beyond the adapter 320. An anti-shift mechanism 500 is connected between the connector 330 and the valve body assembly 200. The anti-shift mechanism 500 is directly connected to the connector 330, and the adapter 320 is indirectly connected to the anti-shift mechanism 500 via the connector 330.

[0076] In this embodiment, the rotor 310 and the adapter 320 are fixedly connected by a connector 330, making the rotor 310, adapter 320, and connector 330 modular in structure, allowing for flexible assembly. When a component needs replacement, it can be directly replaced, facilitating maintenance. The portion of the connector 330 extending beyond the adapter 320 provides an independent and stable mounting reference for the stop mechanism 500, preventing interference between the threaded transmission areas of the stop mechanism 500 and the adapter 320. This reduces thread engagement deviation caused by deformation of the adapter 320 under stress, ensuring the concentricity of the rotor 310, adapter 320, and valve needle assembly 400, and reducing the risk of jamming during adjustment.

[0077] In some embodiments, see Figure 1 , Figure 2 , Figure 3 and Figure 7 The anti-movement mechanism 500 includes a limiting sleeve 510, which is fixedly connected to the valve body assembly 200. The connecting member 330 is rotatably connected to the limiting sleeve 510. The limiting sleeve 510 is adapted to restrict the axial movement of the adapter 320. The valve needle assembly 400 is partially inserted into the limiting sleeve 510.

[0078] For example, the limiting sleeve 510 is a hollow sleeve 321 structure, and one end of the limiting sleeve 510 is fixedly connected to the side wall of the housing 210 of the valve body assembly 200 near the end. The screw 410 of the valve needle assembly 400 can extend into the limiting sleeve 510. The limiting sleeve 510 provides space for the axial movement of the screw 410 and restricts the radial wobbling of the screw 410, avoiding the probability of jamming caused by the screw 410 tilting due to the end of the screw 410 not being positioned. The connecting member 330 is sleeved on the limiting sleeve 510 and is rotatably connected to the limiting sleeve 510. The limiting sleeve 510 is located at one end of the adapter 320, and the adapter 320 abuts against the limiting sleeve 510 to restrict the axial movement of the adapter 320. The connecting member 330, the limiting sleeve 510, and the screw 410 are all coaxially arranged, occupying little radial space and having a compact structure. The limiting sleeve 510 has a simple structure, making it easy to install and operate, as well as to assemble the connector 330 with the mounting sleeve.

[0079] In some embodiments, see Figure 1 and Figure 2 The anti-shift mechanism 500 includes a transition bearing 520, which is connected between the connecting member 330 and the limiting sleeve 510. The outer ring 521 of the transition bearing 520 is fixedly connected to the connecting member 330, and the inner ring 522 of the transition bearing 520 is fixedly connected to the limiting sleeve 510. For example, the outer ring 521 of the transition bearing 520 is welded to the connecting member 330, the inner ring 522 of the transition bearing 520 is welded to the limiting sleeve 510, and the outer ring 521 and the inner ring 522 of the transition bearing 520 are rotatably connected by ball bearings.

[0080] In this embodiment, the transition bearing 520 is rigidly connected to the connecting member 330 and the limiting sleeve 510 via inner and outer rings 521, respectively, restricting the axial displacement of rotating structures such as the rotor 310 and the transition member 320. The rolling friction characteristics of the transition bearing 520 significantly reduce the rotational resistance of the rotor 310 and the transition member 320 compared to sliding friction, resulting in lower energy loss when the rotor 310 drives the transition member 320 to rotate, thus improving the response speed and working efficiency of the rotor assembly 300. The transition bearing 520, the connecting member 330, and the valve body assembly 200 form a rigid fixed structure, fixing the rotor assembly 300 and preventing axial movement of the rotor assembly 300, ensuring the operating accuracy of the valve needle assembly 400, and improving the reliability of the electronic expansion valve 100.

[0081] In some other embodiments, the anti-movement mechanism 500 includes a limiting bearing connected between the end of the rotor 310 near the valve port 250 and the housing 210. The outer ring of the limiting bearing is fixedly connected to the housing 210, and the inner ring is fixedly connected to the end of the rotor 310. The limiting bearing utilizes the space near the valve port 250 of the rotor 310, resulting in a reasonable spatial arrangement. Furthermore, the limiting bearing and the transition bearing 520 can coexist, restricting the axial movement of the rotor 310 from both ends.

[0082] In some embodiments, see Figure 7 and Figure 8 The anti-shift mechanism 500 includes a friction-reducing component 530, which is rotatably connected between the connecting component 330 and the limiting sleeve 510. The friction-reducing component 530 can be a plastic slip ring, with the connecting component 330 sleeved on the plastic slip ring and the plastic slip ring mounted on the limiting sleeve 510. The limiting sleeve 510 is fixedly connected to the valve body assembly 200. In the mechanical structure, the friction-reducing component 530 is an auxiliary element used to reduce the coefficient of friction between two relatively moving parts, reduce wear, improve smoothness of movement, and extend the service life of the assembly. In this embodiment, the friction-reducing component 530 has a low coefficient of friction, reducing the rotational friction of the connecting component 330, reducing the rotational resistance of the adapter 320, and improving the rotational smoothness of the adapter.

[0083] In some embodiments, see Figure 7 and Figure 8 The friction-reducing component 530 includes a first friction-reducing part 531 and a second friction-reducing part 532. The first friction-reducing part 531 is sleeved on the limiting sleeve 510, and the connecting member 330 is sleeved on the first friction-reducing part 531. The second friction-reducing part 532 is connected to the side of the first friction-reducing part 531 near the adapter 320. The second friction-reducing part 532 extends from the end of the first friction-reducing part 531 into the first friction-reducing part 531 and abuts against the end of the limiting sleeve 510 and the adapter 320.

[0084] In this embodiment, the friction between the side of the connector 330 and the limiting sleeve 510 is reduced by the first friction-reducing part 531, and the friction between the end of the adapter 320 and the end of the limiting sleeve 510 is reduced by the second friction-reducing part 532, thereby reducing the rotational resistance of the adapter 320.

[0085] In some embodiments, see Figure 7 and Figure 8 The anti-shift mechanism 500 also includes an elastic support 540, which is installed on the side of the adapter 320 away from the friction reducing member 530. One end of the elastic support 540 is fixed, and the other end is connected to the adapter 320. Under the action of the elastic restoring force of the elastic support 540, the adapter 320 abuts against the friction reducing member 530 or the limiting sleeve 510.

[0086] In this embodiment, an elastic support 540 is provided at the other end of the adapter 320. The elastic support 540 balances the weight of the adapter 320, restricts the adapter 320 from moving downward, and ensures that the adapter 320 is in a relatively fixed position in the axial direction.

[0087] In some embodiments, see Figure 1 and Figure 7 The anti-shift mechanism 500 also includes a fixed base 550, one end of the adapter 320 opposite to the connector 330 is rotatably connected to the fixed base 550, the valve needle assembly 400 passes through the fixed base 550, and the fixed base 550 is fixedly connected to the valve body assembly 200.

[0088] For example, see Figure 1 The valve body assembly 200 includes a housing 210, a valve body 230, and a valve seat 220. The valve body 230 is connected between the housing 210 and the valve seat 220, and together with the housing 210, forms a valve cavity 260 for accommodating part of the structure of the valve needle assembly 400. The anti-shift mechanism 500 includes a fixing seat 550, which is mounted on the valve body 230 and forms a stable fixed connection with it. The fixing seat 550 has a through hole, allowing the valve needle 420 or screw 410 of the valve needle assembly 400 to pass smoothly into the valve seat 220, thereby ensuring its flexible sliding during normal operation. Furthermore, the valve needle assembly 400 passes through and is guided to engage with the fixing seat 550. Understandably, the size of the through hole is adapted to the size of the valve needle 420 or the screw 410 so that the valve needle 420 or the screw 410 is guided and engaged with the fixed seat 550, limiting the radial wobble of the valve needle assembly 400 and improving the reliability of the valve needle assembly 400. One end of the adapter 320 is close to the valve seat 220 and abuts against the fixed seat 550 to improve the stability of the connection. The adapter 320 can rotate relative to the fixed seat 550, and the fixed seat 550 restricts the movement of the adapter 320 to its side, ensuring the normal operation of the device.

[0089] In the embodiments of this application, the fixed base 550 and the limiting sleeve 510 are respectively located at both ends of the adapter 320, restricting the movement of the adapter 320 to both ends. This effectively fixes the axial position of the adapter 320 and the rotor 310, thereby improving the stability and reliability of the entire assembly and increasing the service life and efficiency of the device.

[0090] In some embodiments, see Figure 7 and Figure 8The fixed base 550 has a mounting groove on the side facing the adapter 320, and the elastic support 540 is installed in the mounting groove. A spring bracket 560 is provided in the mounting groove, and the elastic bracket is sleeved on the elastic support 540. The spring bracket 560 connects the end of the adapter 320 and the elastic support 540. One end of the elastic support 540 abuts against the bottom of the mounting groove, and the other end abuts against one side of the spring bracket 560. The other end of the spring bracket 560 abuts against the end of the adapter 320. The elastic support 540 is fixed in the fixed base 550 by the spring bracket 560. The spring bracket 560 and the adapter 320 are rotatably connected. The friction between the spring bracket 560 and the adapter 320 is small, reducing the rotational resistance of the adapter 320.

[0091] In some embodiments, see Figure 1 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9 The rotor assembly 300 also includes an adjustment mechanism 340, which is sleeved on the adapter 320 and connected to the fixed base 550. As the adapter 320 rotates, the adjustment mechanism 340 limits the number of rotations of the adapter 320.

[0092] The number of rotations of the adapter 320 directly determines the displacement of the valve needle assembly 400. By setting an adjustment mechanism 340, which is synchronized with the adapter 320, the number of rotations of the adapter 320 can be limited within a certain range. This reduces the probability of mechanical jamming, wear, collisions, and other problems caused by overtravel of the valve needle assembly 400.

[0093] In some other embodiments, the rotor assembly 300 includes an adjustment mechanism 340, which is sleeved on the adapter 320 and fixedly disposed relative to the housing 210. As the adapter 320 rotates, the adjustment mechanism 340 limits the number of rotations of the adapter 320.

[0094] The specific installation structure of the regulating mechanism 340 can be determined based on the space within the valve body assembly 200, so as to support the installation and fixation of the regulating mechanism 340.

[0095] In some embodiments, see Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 9The adjusting mechanism 340 includes a guide member 341 and an adjusting member 347. The guide member 341 is sleeved on the adapter 320 and coaxially arranged on the adapter 320, ensuring that the adapter 320 can rotate freely while avoiding radial wobble that could cause performance degradation. The guide member 341 is fixedly connected to the fixed base 550 and forms a groove 343 spirally arranged along the axial direction of the adapter 320. The groove 343 is distributed along the axial direction of the adapter 320 in a spiral line, and the spiral angle is designed according to the number of rotations of the adapter 320 to be restricted. The adjusting member 347 is installed in the groove 343 and connected to the adapter 320. The adapter 320 drives the adjusting member 347 to move between a first position and a second position within the groove 343. In the first and second positions, the adjusting member 347 restricts the rotation of the adapter 320. In the first position, the adjusting member 347 restricts the adapter 320 from rotating in the first direction; in the second position, the adjusting member 347 restricts the adapter 320 from rotating in the opposite direction of the first direction.

[0096] The adjusting member 347, acting as a linkage actuator of the adapter 320, rotates synchronously with the adapter 320. When the mover drives the adapter 320 to rotate, the adjusting member 347 is subjected to the rotational force from the adapter 320 and the constraint force exerted by the groove wall of the slide 343, enabling the rotating member to move spirally along the track seat of the spiral slide 343 and along the axial direction of the adapter 320. When the adjusting member 347 moves along the slide 343 to the first position (usually the starting end of the slide 343) or the second position (usually the ending end of the slide 343), the end of the slide 343 forms a rigid block on the adjusting member 347, thereby preventing the adapter 320 from continuing to rotate, thus achieving a physical limit on the number of rotations.

[0097] In this embodiment, the first position and the second position correspond to the forward rotation limit and the reverse rotation limit of the adapter 320, respectively, together constituting a complete rotation range constraint. If it is necessary to change the limited number of rotations of the adapter 320, only a guide 341 with a different lead is needed, without changing the connection structure between the adjusting member 347 and the adapter 320. The replacement operation is simple, improving the application flexibility of the rotor assembly 300.

[0098] In some embodiments, see Figure 4 and Figure 5 The guide member 341 includes a first spring 342, and the gap between each coil of the first spring 342 forms a groove 343. The adjusting member 347 is connected to the first spring 342.

[0099] For example, see Figure 4 , Figure 5 and Figure 9The fixed base 550 is provided with a slot, and one end of the first spring 342 is provided with a hook, which is engaged and fixed in the slot of the fixed base 550. The first spring 342 and the adapter 320 are coaxially arranged, and the gaps formed between the coils of the first spring 342 constitute a rotating groove 343. The distance between adjacent spring coils is the lead of the groove 343. When the adapter 320 rotates, the adjusting member 347 rotates synchronously with it and moves spirally along the gaps between the coils under the constraint of the spring coils. When the adjusting member 347 moves to the starting end (first position) or the ending end (second position) of the first spring 342, the end coil of the spring forms a block for the adjusting member 347. At this time, the axial rigidity of the first spring 342 will transmit the blocking force to the fixed base 550, thereby limiting the adapter 320 from continuing to rotate.

[0100] In this embodiment, the guide 341 is made of a spring, which has a simple structure, is easy to install, reduces material costs, reduces the weight of the adjustment mechanism 340, and can achieve a balanced control of rigidity and elasticity.

[0101] In some embodiments, see Figure 4 and Figure 5 The adjusting member 347 includes a second spring 345, which is sleeved on the adapter 320. The second spring 345 is nested with the first spring 342, and each coil of the second spring 345 is located in the slide groove 343.

[0102] In this embodiment, each coil of the second spring 345 can be precisely embedded into the gap between the coils of the first spring 342, forming a coil-to-coil meshing fit. This nested structure increases the contact area between the adjusting member 347 and the guide member 341, dispersing contact stress. When the adapter 320 rotates, the second spring 345 rotates with it and moves along the helical trajectory of the first spring 342, achieving limit control through the relative helical movement of the two layers of springs.

[0103] In some embodiments, see Figure 4 and Figure 5 The number of coils in the second spring 345 is less than that in the first spring 342. This ensures that all the coils of the second spring 345 always move within the groove 343 of the first spring 342, avoiding the risk of derailment due to overtravel, while also reducing material costs and improving response speed.

[0104] In some embodiments, see Figure 5 The second spring 345 has a hook 346 at one end, which extends toward the adapter 320. The adapter 320 has a protrusion 322 on its surface, which extends axially. The protrusion 322 drives the hook 346 to move the second spring 345 along the slide groove 343.

[0105] In this embodiment, one end of the second spring 345 is bent towards the adapter 320 to form a hook 346. The hook 346 and the protrusion 322 on the surface of the adapter 320 cooperate to form a power transmission node. The protrusion 322 extends axially along the adapter 320, and its length is slightly greater than the effective working stroke of the second spring 345. When the adapter 320 rotates, the protrusion 322 and the hook 346 form rigid contact, actuating the second spring 345 and driving it to rotate synchronously with the adapter 320. This, in turn, causes each coil of the second spring 345 to move along a spiral trajectory within the groove 343 of the first spring 342, improving transmission efficiency and reducing power loss. If the second spring 345 suffers fatigue damage due to long-term use, the hook 346 and the protrusion 322 can be separated for quick replacement without disassembling the adapter 320 or the fixing seat 550, simplifying the maintenance process.

[0106] In some embodiments, see Figure 4 and Figure 5 The adapter 320 has multiple protrusions 322 on its surface, spaced apart along the axial direction of the adapter 320, and the protrusions 322 are positioned relative to the first spring 342. The multiple protrusions 322 are also evenly spaced along the circumference of the adapter 320. For example, four protrusions 322 may be arranged circumferentially along the adapter 320. As the adapter 320 rotates, each protrusion 322 actuates the hook 346, causing the second spring 345 to rotate.

[0107] In this embodiment, the multiple protrusions 322 spaced circumferentially along the adapter 320 enable the hook portion 346 to relay and actuate during the rotation of the adapter 320, ensuring the continuity of power transmission. This reduces the idle time of the adapter 320 and improves the actuation force of the rotor assembly 300. The protrusions 322 on the surface of the adapter 320 also support the first spring 342, preventing deformation and improving the structural strength of the guide member 341.

[0108] In some embodiments, see Figure 4 and Figure 5 The first spring 342 has a limiting part 344 at each end. The limiting part 344 near the fixed base 550 is fixedly connected to the fixed base 550, and the other limiting part 344 is used to abut against the second spring 345.

[0109] For example, see Figure 5One end of the first spring 342 near the fixed base 550 has a hook segment extending circumferentially along the fixed base 550 to form a limiting part 344. The limiting part 344 is fixed in the corresponding groove of the fixed base 550, thereby fixing the first spring 342 to the fixed base 550. The other end of the first spring 342 has a hook segment extending axially along the first spring 342 to form the limiting part 344. The height of the limiting part 344 is greater than the diameter of the spring coil of the second spring 345. When the second spring 345 moves to the end of the first spring 342, the limiting part 344 abuts against the second spring 345 to prevent the second spring 345 from overtraveling and slipping out of the first spring 342.

[0110] In some embodiments, see Figure 1 and Figure 2 The connector 330 includes a first connecting sub-part 331 and a second connecting sub-part 332 that are fixedly connected. The first connecting sub-part 331 and the second connecting sub-part 332 are welded and fixedly connected. The first connecting sub-part 331 is fixedly connected to the rotor 310 by snap-fit. The second connecting sub-part 332 is fixedly connected to the adapter 320 by snap-fit ​​or welding. The anti-shift mechanism 500 connects the second connecting sub-part 332 and the valve body assembly 200.

[0111] For example, see Figure 1 and Figure 7 The second connecting part 332 is connected to the limiting sleeve 510 via a transition bearing 520 or a friction reducing component 530.

[0112] In this embodiment, the connector 330 is fixedly connected via a first connecting sub-part 331 and a second connecting sub-part 332, forming a transmission bridge between the rotor 310 and the adapter 320. The first connecting sub-part 331 is fixedly connected to the rotor 310, transmitting the rotational power of the rotor 310 to the second connecting sub-part 332 without damage, and then the second connecting sub-part 332 drives the connector 330 to move synchronously. This segmented connection design can effectively compensate for the coaxiality error between the rotor 310 and the adapter 320, avoid power transmission jamming caused by assembly deviations, and improve transmission efficiency. The split connector 330 is easy to adapt to different models of rotors 310 and adapters 320, and has a wide range of applications.

[0113] In some embodiments, see Figure 2Both the first connecting sub-part 331 and the second connecting sub-part 332 include a cylindrical part 333 and an extension part 334. The extension part 334 of the first connecting sub-part 331 extends from the end of the cylindrical part 333 into the rotor 310 and is fixedly connected to the rotor 310. A slot is provided near the end of the rotor 310 on the side facing the first connecting sub-part 331, and the extension part 334 of the first connecting sub-part 331 extends into the slot and is fixedly connected to the rotor 310. The extension part 334 of the second connecting sub-part 332 extends from the end of the cylindrical part 333 into the adapter 320 and is fixedly connected to the adapter 320. A slot is provided near the end of the adapter 320 on the side facing the rotor 310, and the extension part 334 of the second connecting sub-part 332 extends into the slot and is fixedly connected to the adapter 320. The cylindrical portion 333 of the first connecting sub-part 331 is sleeved on the cylindrical portion 333 of the second connecting sub-part 332, and the cylindrical portion 333 of the second connecting sub-part 332 is sleeved on the anti-shift mechanism 500.

[0114] In this embodiment, both the first connecting sub-part 331 and the second connecting sub-part 332 include a cylindrical portion 333, ensuring that the connector 330, rotor 310, and adapter 320 are coaxially arranged, reducing assembly difficulty. Both the first connecting sub-part 331 and the second connecting sub-part 332 include an extension portion 334, achieving a keyed fit with a large contact area, effectively resisting the torque generated during rotor 310 rotation and preventing slippage or breakage at the connection point. The first connecting sub-part 331 and the second connecting sub-part 332 adopt a back-to-back connection structure, and the gap between the adapter 320 and the rotor 310 is adjustable, providing space for the installation of the adjustment mechanism 340, resulting in a reasonable spatial arrangement.

[0115] In some embodiments, see Figure 1 and Figure 6 The anti-rotation mechanism 600 includes an anti-rotation component 610 and an anti-rotation mating component 620. The anti-rotation component 610 is located between the limiting sleeve 510 and the valve needle assembly 400. The anti-rotation component 610 is fixedly connected to the limiting sleeve 510. The anti-rotation mating component 620 is provided on the valve needle assembly 400. The anti-rotation component 610 and the anti-rotation mating component 620 are slidably connected to limit the rotation of the valve needle assembly 400.

[0116] The anti-rotation mechanism 600 establishes rotational constraints on the valve needle assembly 400 through the cooperation of the anti-rotation component 610 and the anti-rotation mating component 620. It also provides guidance for the axial movement of the valve needle assembly 400, ensuring that the valve needle assembly 400 maintains a stable trajectory during axial reciprocating motion and reducing vibration and noise.

[0117] In some embodiments, see Figure 1 and Figure 6The anti-rotation component 610 includes a slider 611, and the anti-rotation mating component 620 includes an axially extending anti-rotation groove 621. The slider 611 is slidably mounted in the anti-rotation groove 621. The anti-rotation component 610 has a mounting sleeve through which the screw 410 of the valve needle assembly 400 passes. A limiting sleeve 510 is fitted onto the anti-rotation component 610 and is fixedly connected to the mounting sleeve. The inner surface of the mounting sleeve forms an inwardly protruding slider 611. The screw 410 has an axially extending anti-rotation groove 621. One end opening 211 of the anti-rotation groove 621 extends to the end of the screw 410. The slider 611 enters the anti-rotation groove 621 from the end opening 211, facilitating the assembly of the anti-rotation component 610, the anti-rotation mating component 620, and the limiting sleeve 510. The mating clearance of the concave and convex structure of the anti-rotation mechanism 600 can be controlled within a small range to prevent the screw 410 from rotating or moving radially, ensuring that the sealing surfaces of the valve needle 420 and the valve seat 220 maintain a preset relative position and guaranteeing sealing performance.

[0118] The axial length of the anti-rotation groove 621 can be designed according to the maximum stroke of the valve needle assembly 400. The movement range of the slider 611 within the anti-rotation groove 621 completely covers the working stroke of the screw 410. Even if the valve needle 420 experiences a slight radial offset due to assembly errors, the slider 611 can still maintain a stable fit within the groove without jamming. Furthermore, the slider 611 can be designed as a split unit, which can absorb stress through a slight yield when subjected to radial impact, reducing damage to the anti-rotation groove 621 and extending the service life of the overall structure.

[0119] In other embodiments, the anti-rotation member 610 includes an axially extending anti-rotation groove 621, and the anti-rotation mating member 620 includes a slider 611 protruding from a surface.

[0120] In some embodiments, see Figure 6 The valve needle assembly 400 includes a screw 410 and a valve needle 420. The valve needle 420 is installed at one end of the screw 410. The screw 410 is provided with a threaded section 411. An anti-rotation groove 621 is formed on the screw 410 and is located between the threaded section 411 and the other end of the screw 410.

[0121] In the embodiments of this application, see Figure 6 The anti-rotation groove 621 and the valve needle 420 are located at both ends of the screw 410, respectively, constraining the end of the screw 410. The slider 611 at the anti-rotation groove 621 can limit the bending amplitude of the screw 410 by contacting the groove wall, avoiding excessive radial displacement at the end of the valve needle 420 and improving the reliability of the electronic expansion valve 100. The anti-rotation groove 621 is located between the threaded section and the end of the screw 410, reserving sufficient space for the machining and assembly of the threaded section 411. The assembly of the rotor assembly 300 and the screw 410 will not affect the installation of the anti-rotation mechanism 600, making the assembly operation simple and efficient.

[0122] In some embodiments, see Figure 1 and Figure 6 The valve seat 220 assembly also includes an end cap 240. The end of the housing 210 is provided with an opening 211. The end of the valve needle assembly 400 is aligned with the opening 211. The end cap 240 covers the opening 211. The end cap 240 and the housing 210 are detachably and fixedly connected.

[0123] For example, see Figure 1 , Figure 6 and Figure 7 The valve seat 220 assembly includes a housing 210, a valve body 230, and a valve seat 220. One end of the housing 210 is fixedly connected to the valve seat 220, and the valve seat 220 is connected to the valve body 230. The valve seat 220 has a valve port 250, and the other end of the housing 210 has an opening 211. The end cap 240 is detachably and fixedly connected to the housing 210, and the end cap 240 covers the opening 211. The opening 211, the valve port 250, the screw 410 of the valve needle assembly 400, and the valve needle 420 are all located on the same axis. In the initial stage of assembly of the valve needle assembly 400 and the rotor assembly 300, the tool enters the housing 210 through the opening 211 to adjust the initial position of the screw 410 and the adapter 320, allowing for flexible assembly. After the valve needle assembly 400 and the rotor assembly 300 are assembled, the end cover 240 is placed over the opening 211 of the housing 210 to form a sealed space, preventing dust and other contaminants from entering the housing 210 through the opening 211 and affecting the valve needle assembly 400 and the rotor assembly 300.

[0124] In some embodiments, see Figure 1 The end cap 240 is located at the end of the anti-rotation mechanism 600, and the anti-rotation mechanism 600 is fixedly connected to the end cap 240.

[0125] For example, see Figure 1 and Figure 6 The anti-rotation mechanism 600 includes an anti-rotation element 610, which comprises a mounting sleeve and a slider 611. The slider 611 is mounted on the inner surface of the mounting sleeve. A limiting sleeve 510 is fitted onto the outer surface of the mounting sleeve. The side of the mounting sleeve near the end cover 240 abuts against the end cover 240, and a mutually positioning concave-convex structure is formed between the end faces of the mounting sleeve and the end cover 240. The anti-rotation mechanism 600 is precisely aligned with the end cover 240, preventing radial offset. The mounting sleeve is fixedly connected to the end cover 240, and the end cover 240 is fixedly connected to the housing 210. The structure is compact, improving the operating temperature performance and reliability of the electronic expansion valve 100.

[0126] For the second aspect, see [link / reference] Figures 1 to 9 This application also provides a thermal management system, including the electronic expansion valve 100 as described in any of the preceding claims. This thermal management system possesses all the beneficial effects of the electronic expansion valve 100 described above, which will not be repeated here.

[0127] Thirdly, see [the third aspect]. Figures 1 to 10 This application also provides a vehicle 10, including the thermal management system described above. The vehicle 10 possesses all the beneficial effects of the aforementioned thermal management system, which will not be elaborated further herein.

[0128] The vehicle 10 may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0129] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0130] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0131] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0132] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An electronic expansion valve (100), characterized in that, include: The valve body assembly (200) forms a valve cavity (260) and a valve port (250); The rotor assembly (300) is installed inside the valve chamber (260); A valve needle assembly (400) is provided, wherein the rotor assembly (300) is threadedly connected to the valve needle assembly (400); An anti-shift mechanism (500) restricts the axial movement of the rotor assembly (300); An anti-rotation mechanism (600) restricts the rotation of the valve needle assembly (400); When the rotor assembly (300) rotates relative to the valve needle assembly (400), the valve needle assembly (400) moves along the axial direction to adjust the opening of the valve port (250).

2. The electronic expansion valve (100) according to claim 1, characterized in that, The rotor assembly (300) includes a rotor (310) and an adapter (320) that are fixedly connected. The rotor (310) is sleeved on the adapter (320), and the adapter (320) is threadedly connected to the valve needle assembly (400).

3. The electronic expansion valve (100) according to claim 2, characterized in that, The anti-movement mechanism (500) is connected between the adapter (320) and the valve body assembly (200) to restrict the rotor (310) and the adapter (320) from moving axially.

4. The electronic expansion valve (100) according to claim 2, characterized in that, The adapter (320) is a sleeve structure, and the valve needle assembly (400) is at least partially inserted inside the adapter (320).

5. The electronic expansion valve (100) according to claim 2, characterized in that, The rotor assembly (300) further includes a connector (330) connected between the rotor (310) and the adapter (320), the connector (330) extending out of the adapter (320), and the anti-shift mechanism (500) connected between the connector (330) and the valve body assembly (200).

6. The electronic expansion valve (100) according to claim 5, characterized in that, The anti-movement mechanism (500) includes a limiting sleeve (510), which is fixedly connected to the valve body assembly (200), and the connecting member (330) is rotatably connected to the limiting sleeve (510), which is suitable for restricting the axial movement of the adapter (320).

7. The electronic expansion valve (100) according to claim 6, characterized in that, The anti-shift mechanism (500) further includes a transition bearing (520), which is connected between the connector (330) and the limiting sleeve (510). The outer ring (521) of the transition bearing (520) is fixedly connected to the connector (330), and the inner ring (522) of the transition bearing (520) is fixedly connected to the limiting sleeve (510).

8. The electronic expansion valve (100) according to claim 6 or 7, characterized in that, The anti-shift mechanism (500) further includes a fixed seat (550), which is fixedly connected to the valve body assembly (200), and the valve needle assembly (400) passes through and is guided to cooperate with the fixed seat (550).

9. The electronic expansion valve (100) according to claim 8, characterized in that, The rotor assembly (300) further includes an adjustment mechanism (340), which is sleeved on the adapter (320) and connected to the adapter (320), and is adapted to limit the number of rotations of the adapter (320); The adjustment mechanism (340) includes a guide (341) and an adjustment member (347). The guide (341) is sleeved on the adapter (320) and fixedly connected to the fixed seat (550). The guide (341) forms a sliding groove (343) spirally arranged along the axial direction of the adapter (320). The adjustment member (347) is installed in the sliding groove (343). The guide (341) is fixedly connected to the fixed seat (550), and the adjustment member (347) is connected to the adapter (320). The adapter (320) drives the adjustment member (347) to move between a first position and a second position in the sliding groove (343).

10. The electronic expansion valve (100) according to claim 6, characterized in that, The anti-rotation mechanism (600) includes an anti-rotation component (610) and an anti-rotation mating component (620). The anti-rotation component (610) is located between the limiting sleeve (510) and the valve needle assembly (400). The anti-rotation component (610) is fixedly connected to the limiting sleeve (510). The anti-rotation mating component (620) is provided on the valve needle assembly (400). The anti-rotation component (610) and the anti-rotation mating component (620) are slidably connected along the axial direction to restrict the rotation of the valve needle assembly (400).

11. The electronic expansion valve (100) according to claim 10, characterized in that, The anti-rotation component (610) includes a slider (611), and the anti-rotation mating component (620) includes an anti-rotation groove (621) extending along the axial direction. The slider (611) is fixedly connected to the limiting sleeve (510), and the slider (611) is slidably installed in the anti-rotation groove (621). The valve needle assembly (400) includes a screw (410) and a valve needle (420). The valve needle (420) is mounted on one end of the screw (410). The screw (410) has a threaded section (411). An anti-rotation groove (621) is formed on the screw (410) and is located between the threaded section (411) and the other end of the screw (410).

12. The electronic expansion valve (100) according to claim 11, characterized in that, The valve body assembly (200) further includes an end cap (240) and a housing (210). The end of the housing (210) is provided with an opening (211). The end of the valve needle assembly (400) is aligned with the opening (211). The end cap (240) covers the opening (211). The end cap (240) and the housing (210) are detachably and fixedly connected. The end cap (240) is located at the end of the anti-rotation mechanism (600), and the anti-rotation mechanism (600) is fixedly connected to the end cap (240).

13. The electronic expansion valve (100) according to claim 5, characterized in that, The connector (330) includes a first connecting sub-part (331) and a second connecting sub-part (332) fixedly connected. The first connecting sub-part (331) is fixedly connected to the rotor (310), and the second connecting sub-part (332) is fixedly connected to the adapter (320). The anti-shifting mechanism (500) is connected between the second connecting sub-part (332) and the valve body assembly (200). Both the first connecting sub-part (331) and the second connecting sub-part (332) include a cylindrical portion (333) and an extension portion (334). The extension (334) of the first connecting sub-part (331) extends from the end of the cylindrical part (333) into the rotor (310) and is fixedly connected to the rotor (310). The extension (334) of the second connecting sub-part (332) extends from the end of the cylindrical part (333) into the adapter (320) and is fixedly connected to the adapter (320). The cylindrical part (333) of the first connecting sub-part (331) is sleeved on the cylindrical part (333) of the second connecting sub-part (332). The cylindrical part (333) is sleeved on the anti-shift mechanism (500).

14. A thermal management system, characterized in that, Includes the electronic expansion valve (100) as described in any one of claims 1 to 13.

15. A vehicle (10), characterized in that, Includes the thermal management system as described in claim 14.

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