Valve device

Abstract

The valve device comprises the guide part and the sliding part, the guide part is arranged in the radial direction of the valve device and located on one of the rotor assembly and the valve seat, one end of the sliding part is in sliding connection with the guide part, and the other end of the sliding part is in limiting connection or fixed connection with the other one of the rotor assembly and the valve seat. The valve device is relatively simple in structure, and miniaturization of the valve device is facilitated.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a valve device. Background Art

[0002] A known valve device includes a stop structure. For example, in the invention patent with authorization announcement number CN104913098B, the stop structure includes a nut, a limit spring, and a stop ring. The limit spring is sleeved on the nut. The limit spring has a spiral guide portion, an upper sliding portion, and a positioning portion. The stop ring is located on the spiral guide portion. The stop ring slides along the spiral guide portion between the upper sliding portion and the positioning portion. The limit spring is sleeved on the nut, which makes the product structure complex. Summary of the invention

[0003] To achieve the above-mentioned purpose, the present application also provides a valve device, including a rotor assembly, a valve seat, a guide portion and a sliding portion, the guide portion including a first limit portion and a second limit portion, the guide portion is arranged along the radial direction of the valve device, the guide portion is located at one of the rotor assembly and the valve seat, one end of the sliding portion is slidably connected to the guide portion, and the other end of the sliding portion is connected or fixedly connected to the other limit portion of the rotor assembly and the valve seat; when the sliding portion abuts against one of the first limit portion and the second limit portion, the rotor assembly stops rotating.

[0004] The valve device provided in the present application includes a guide portion and a sliding portion. The guide portion is arranged along the radial direction of the valve device, and the guide portion is located at one of the rotor assembly and the valve seat. One end of the sliding portion is slidably connected to the guide portion, and the other end of the sliding portion is limitedly connected or fixedly connected to the other one of the rotor assembly and the valve seat. The valve device of the present application has a relatively simple structure, which is conducive to the miniaturization of the valve device. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 is a schematic diagram of a first specific embodiment of a valve device;

[0006] Figure 2 for Figure 1 A schematic structural diagram of a valve component of a valve device;

[0007] Figure 3 for Figure 1 A schematic diagram of a stator component of a valve device;

[0008] Figure 4 for Figure 1 A schematic diagram of a rotor assembly of a valve device;

[0009] Figure 5 for Figure 1 A schematic structural diagram of a guide portion of a valve device;

[0010] Figure 6 for Figure 1 A schematic structural diagram of a sliding portion of a valve device;

[0011] Figure 7 for Figure 1 A schematic diagram of the operating position of the sliding portion of the valve device;

[0012] Figure 8 for Figure 1 A schematic diagram of the structure of a valve seat of a valve device;

[0013] Fig. 9 for Figure 8 Schematic diagram of the middle valve seat from another perspective;

[0014] Fig.10 for Figure 1 A schematic diagram of the structure of a screw rod and a valve core assembly of a valve device;

[0015] Fig.11 for Fig.10 Schematic diagram of part of the structure of the middle valve stem;

[0016] Fig.12 for Fig.10 Schematic diagram of another perspective of the middle screw;

[0017] Fig.13 It is a structural schematic diagram of the valve body;

[0018] Fig.14 for Figure 1 The valve device is intended to be in a fully closed state;

[0019] Fig.15 for Figure 1 The valve device is intended to be in a fully open state;

[0020] Fig.16 is a schematic diagram of a second specific embodiment of a valve device;

[0021] Fig.17 for Fig.16 Schematic diagram of the valve seat;

[0022] Fig.18 for Fig.16 Schematic diagram of the rotor assembly.

[0023] The reference numerals in the figures are described as follows:

[0024] 10. stator component; 11. coil assembly; 12. injection molding part; 13. first accommodating cavity;

[0025] 20. Valve component; 21. Valve seat; 211. Mounting groove; 212. Valve port; 213. Limiting hole; 214. Limiting protrusion; 22. Rotor assembly; 221. Magnet; 222. Nut seat; 223. First end; 224. Second end; 225. Slot; 226. First mounting hole; 23. Valve core assembly; 231. Valve needle; 232. Valve stem; 2321. Groove; 2322. First side wall; 2323. Second side wall; 233. Valve head; 234. Elastic element; 24. Screw; 241. Second mounting hole; 242. Limiting groove; 25. Sleeve; 251. First opening; 252. First wall; 253. Second accommodating chamber; 26. Retaining ring; 261. Third limiting part; 262. Fourth limiting part;

[0026] 41. guide portion; 411. guide groove; 4111. first limiting portion; 4112. second limiting portion; 42. sliding portion; 421. first connecting portion; 422. second connecting portion; 423. third connecting portion;

[0027] 50. first sealing ring; 51. second sealing ring;

[0028] 60. Valve body; 61. Installation cavity; 62. First flow channel; 63. Second flow channel. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0030] It should be understood that although the first, second, third, fourth, etc. may be used to describe various information in this application, these information should not be limited to these descriptions. These terms are only used to distinguish the same type of information from each other. Multiple means two or more. In the absence of conflict, the various embodiments in this application can complement each other.

[0031] Example 1

[0032] The valve device can be applied to a vehicle thermal management system or an air conditioning system. In the vehicle thermal management system, the valve device is often used as a throttling element or a switching element. Figure 1-Figure 15, an embodiment of a valve device, the valve device includes a valve component 20 and a stator component 10, the stator component 10 is located at the periphery of at least part of the valve component 20, the stator component 10 is fixedly or positionally connected to the valve component 20, and further, a sealing arrangement can be provided between the stator component 10 and the valve component 20, which is beneficial to prevent water vapor or other impurities in the external environment from entering through the assembly gap between the stator component 10 and the valve component 20, causing corrosion or failure inside the stator component 10. The stator component 10 includes a coil assembly 11 and an injection molding part 12, the injection molding part 12 covers at least part of the coil assembly 11, that is, the stator component 10 is injection molded with at least the coil assembly 11 as an insert, the stator component 10 has a first accommodating cavity 13 with an opening at the lower end, and the valve device is electrically connected and / or signal connected to the outside world through the stator component 10.

[0033] Reference Figure 2 The valve component 20 includes a valve seat 21, a rotor assembly 22, a valve core assembly 23, a screw 24 and a sleeve 25. At least part of the sleeve 25 is located in the first accommodating chamber 13. The lower end of the sleeve 25 has a first opening 251, and the first opening 251 is fixedly connected to the valve seat 21. Specifically, the sleeve 25 has a second accommodating chamber 253. At least part of the valve seat 21 is located in the second accommodating chamber 253. The first opening 251 of the sleeve 25 abuts against the valve seat 21 and is fixedly connected by welding. The coil assembly 11 is located on the outside of the sleeve 25, and at least part of the rotor assembly 22 is located on the inside of the sleeve 25, that is, at least part of the rotor assembly 22 is located in the second accommodating chamber 253. The rotor assembly 22 is drivingly connected to the screw 24. Specifically, the rotor assembly 22 is threadedly connected to the screw 24, and the screw 24 is limitedly connected to the valve core assembly 23. Passing a predetermined current through the coil assembly 11 can generate an excitation magnetic field, driving the rotor assembly 22 to rotate. The rotor assembly 22 is threadedly connected to the screw rod 24, and the screw rod 24 moves along the axial direction of the valve device. The screw rod 24 is limitedly connected to the valve core assembly 23, that is, the screw rod 24 drives the valve core assembly 23 to move along the axial direction of the valve device, and converts the rotation of the rotor assembly 22 into an axial movement of the valve core assembly 23 relative to the valve seat 21. The valve component 20 also has a valve port 212, and the valve port 212 is located on the valve seat 21. The valve core assembly 23 can open or close the valve port 212, or adjust the flow area of ​​the valve port 212 to adjust the flow rate through the valve port 212. In the related art, the valve seat 21 is composed of at least two parts, namely, the valve seat 21 portion and the valve seat 21 mouth portion. The valve seat 21 portion and the valve seat 21 mouth portion are fixedly connected or limitedly connected. In this embodiment, as Figure 8 As shown, the valve seat 21 is an integrated structure, which has a simple structure, is easy to process, and has a relatively reduced manufacturing cost compared to the related art.

[0034] like Figure 2 and Figure 4As shown, along the axial direction of the valve device, the rotor assembly 22 is located in the second accommodating cavity 253 of the sleeve 25, and the rotor assembly 22 is close to the first wall portion 252 of the sleeve 25 relative to the valve seat 21, and the sleeve 25 and the valve seat 21 limit the axial displacement of the rotor assembly 22. In this embodiment, the rotor assembly 22 includes a magnet 221 and a nut seat 222, and the magnet 221 and the nut seat 222 are fixedly connected or limitedly connected or have an integral structure. For example, the nut seat 222 is made of plastic material, and the nut seat 222 covers the magnet 221, that is, the rotor assembly 22 is injection molded with the magnet 221 as an insert. Along the axial direction of the valve device, the nut seat 222 has a first end 223 and a second end 224, the second end 224 is closer to the valve seat 21 relative to the first end 223, the sleeve 25 includes a first wall portion 252, along the axial direction of the valve device, the first wall portion 252 is arranged opposite to the first opening portion 251, the first end 223 of the nut seat 222 abuts against the first wall portion 252 of the sleeve 25, and the second end 224 of the nut seat 222 abuts against or fits with a small gap with the valve seat 21. In this embodiment, the upper and lower limit methods are used to limit the axial movement of the rotor assembly 22. In actual applications, in order to ensure that the rotor assembly 22 can rotate normally, a small gap is reserved between the first end 223 of the nut seat 222 and the first wall portion 252 of the sleeve 25, or a small gap is reserved between the second end 224 of the nut seat 222 and the valve seat 21, and the gap is set according to the actual product. Of course, in some embodiments, the rotor assembly 22 can be axially limited by bearings, and the bearings are located between the rotor assembly 22 and the valve seat 21. As long as the rotor assembly 22 can only rotate without axial movement, the axial movement of the rotor assembly 22 is limited, which does not mean that it will not move absolutely. Within the tolerance range, the rotor assembly 22 can move up and down in a small range.

[0035] The nut seat 222 also includes a groove cavity 225, and along the axial direction of the valve device, the groove cavity 225 has an opening, and the opening faces the first wall portion 252. The nut seat 222 includes a first mounting hole 226, and the screw rod 24 is threadedly connected to the nut seat 222. It should be noted that the threaded connection here refers to a threaded connection that can be transmitted. Along the axial direction of the valve device, the first mounting hole 226 penetrates the bottom wall and the second end portion 224 of the groove cavity 225, and at least part of the screw rod 24 is located in the first mounting hole 226. The rotor assembly 22 has an internal thread, and the internal thread is located in the wall portion forming the first mounting hole 226. The outer wall of the screw rod 24 has an external thread. The internal thread of the rotor assembly 22 cooperates with the external thread of the screw rod 24, so that the rotational movement of the rotor assembly 22 is converted into the axial movement of the screw rod 24. In the present application, the thread is arranged on the nut seat, that is, the nut seat is part of the rotor assembly. In the related art, the nut seat is relatively fixed to the valve seat or the nut seat is fixed to the valve body. The rotor assembly includes a connecting part (which carries part of the function of the nut seat in the present application) and a magnet. The rotor assembly and the screw rod are relatively fixed and rotate and move. Compared with the related art, the present application omits the support part, the number of parts is relatively small, and the structure is simpler.

[0036] The valve core assembly 23 includes a valve needle 231 and an elastic element 234. The valve needle 231 includes a valve stem 232 and a valve head 233. The valve stem 232 and the valve head 233 can be separate structures, fixed by welding, clamping, bonding, etc. The valve stem 232 and the valve head 233 can also be an integral structure. In this embodiment, the valve stem 232 and the valve head 233 are an integral structure. The screw rod 24 includes a second mounting hole 241. Along the axial direction of the valve component 20, the second mounting hole 241 passes through the upper and lower ends of the screw rod 24. At least part of the valve stem 232 is located in the second mounting hole 241, and one end of the valve stem 232 passes through the second mounting hole 241 of the screw rod 24. The valve component 20 also includes a retaining ring 26. The main function of the retaining ring 26 is to limit the relative displacement between the screw rod 24 and the valve stem 232. Specifically, the valve stem 232 has a groove 2321, which is located at the end of the valve stem 232 away from the valve head 233. Along the radial direction of the valve stem 232, the groove 2321 is recessed from the outer wall of the valve stem 232 to the direction away from the outer wall. At least part of the retaining ring 26 is located in the groove 2321. Along the axial direction of the valve device, when the screw rod 24 moves upward, the upper end of the screw rod abuts against the lower end of the retaining ring 26. The groove 2321 includes a first side wall portion 2322 and a second side wall portion 2323. Along the axial direction of the valve member 20, the first side wall portion 2322 is arranged opposite to the second side wall portion 2323. The retaining ring 26 includes a third limiting portion 261 and a fourth limiting portion 262. Along the axial direction of the valve member 20, the third limiting portion 261 and the fourth limiting portion 262 are arranged opposite to each other. During assembly, the third limiting portion 261 abuts against the first side wall portion 2322 of the groove 2321, the fourth limiting portion 262 abuts against the second side wall portion 2323 of the groove 2321, or the fourth limiting portion 262 abuts against the upper end of the screw rod 24. Along the axial direction of the valve device, the elastic element 234 is located between the screw rod 24 and the valve head 233, and the elastic element 234 is sleeved on the valve stem 232, one end of the elastic element 234 abuts against the lower end of the valve stem 232, and the other end of the elastic element 234 abuts against the upper end of the valve head 233. In the present application, the elastic element 234 is a spring. When the valve device is working, the elastic element 234 is in a compressed state. The main function of the elastic element 234 is to provide pressure to the valve needle 231 when closing the valve, so as to prompt the valve needle 231 to close the valve quickly. Specifically, when the valve device is opening, the third limiting portion 261 of the retaining ring 26 abuts against the first side wall portion 2322 of the groove 2321, and the screw rod 24 drives the valve needle 231 to move upward. When the valve device is closing, the screw rod 24 moves downward along the axial direction of the valve component 20, and the spring in the compressed state releases elastic force, prompting the valve needle 231 to quickly close the valve. The valve needle 231 assembly of the present application has a simple structure and is easy to manufacture.

[0037] The valve seat 21 includes a mounting groove 211. Along the axial direction of the valve member 20, the mounting groove 211 is recessed from one end of the valve seat 21 toward the rotor assembly 22 to the end away from the rotor assembly 22. At least part of the screw rod 24 is located in the mounting groove 211, and the screw rod 24 is slidably connected to the valve seat 21. Driven by the rotor assembly 22, the screw rod 24 moves along the axis of the valve member 20 to open or close the valve port 212. In order to limit the circumferential rotation of the valve core assembly 23, a limiting structure is provided on the screw rod 24 and the valve seat 21. Specifically, the valve seat 21 includes a limiting protrusion 214. Along the radial direction of the valve seat 21, the limiting protrusion 214 extends inward from the wall of the mounting groove 211. The screw rod 24 has a limiting groove 242, which is located on the outer wall of the screw rod 24. The limiting groove 242 is recessed from the outer wall of the screw rod 24 to the direction away from the outer wall of the screw rod 24. At least part of the limiting protrusion 214 is located in the limiting groove 242, and the limiting protrusion 214 cooperates with the limiting groove 242 to limit the rotation of the screw rod 24. Of course, in other embodiments, the limiting protrusion and the limiting groove can be interchanged, that is, the limiting protrusion is located on the screw rod 24, and the limiting groove is located on the valve seat 21. In some embodiments, the projection of the side wall forming the installation groove 211 in the cross section perpendicular to the axial direction of the valve device is non-circular, and the part of the screw rod 24 that matches the valve seat 21 matches the cross-sectional shape of the installation groove 211, thereby limiting the axial rotation of the screw rod 24. In the present application, the valve seat 21 is an integrated structure, and a limiting structure is set on the valve seat 21, which omits the anti-rotation part in the related art and simplifies the structure of the valve device.

[0038] The valve device also includes a guide portion 41 and a sliding portion 42. The guide portion 41 includes a first limit portion 4111 and a second limit portion 4112. The guide portion 41 is arranged along the radial direction of the valve device. The guide portion 41 is located at one of the rotor assembly 22 and the valve seat 21. One end of the sliding portion 42 is slidably connected to the guide portion 41, and the other end of the sliding portion 42 is limitedly connected or fixedly connected to the other of the rotor assembly 22 and the valve seat 21. When the sliding portion 42 abuts against one of the first limit portion 4111 and the second limit portion 4112, the rotor assembly 22 stops rotating. In this embodiment, the guide portion 41 is located at the rotor assembly 22. Specifically, as Figure 4-Figure 7As shown, the guide portion 41 is located at the end of the rotor assembly 22 close to the valve seat 21, that is, the guide portion 41 is located at the second end 224 of the rotor assembly 22, and the guide portion 41 is arranged along the radial direction of the valve device; the guide portion 41 and the rotor assembly 22 are an integral structure, or the guide portion 41 and the rotor assembly 22 are a separate structure, and the guide portion 41 and the rotor assembly 22 are fixedly connected or limit-connected. Specifically, the guide portion 41 and the nut seat 222 of the rotor assembly 22 can be fixedly connected by welding or bonding, or the guide portion 41 and the nut seat 222 of the rotor assembly 22 can be limit-connected by snapping, plugging, etc. In this embodiment, the guide portion 41 and the rotor assembly 22 are an integral structure. Specifically, the guide portion 41 has a guide groove 411. The guide groove 411 has an opening along the axial direction of the valve device. The guide groove 411 is recessed from the second end 224 of the rotor assembly 22 to the first end 223 of the rotor assembly 22. The guide groove 411 has a first limiting portion 4111 and a second limiting portion 4112. Along the radial direction of the valve device, the first limiting portion 4111 is closer to the axis of the valve device relative to the second limiting portion 4112. The guide groove 411 extends from the first limiting portion 4111 to the second limiting portion 4112 in a spiral shape. One end of the sliding portion 42 is located in the guide groove 411, and the other end of the sliding portion 42 is limitedly connected to the valve seat 21. The valve seat 21 has a limiting hole 213. The limiting hole 213 can be a blind hole or a through hole. Along the axial direction of the valve component 20, the opening of the limiting hole 213 faces the guide groove 411, and at least part of the sliding portion 42 is located in the limiting hole 213. The sliding portion 42 includes a first connection portion 421, a second connection portion 422 and a third connection portion 423. The second connection portion 422 is located between the first connection portion 421 and the second connection portion 422. At least a portion of the first connection portion 421 is located in the guide groove 411, and at least a portion of the third connection portion 423 is located in the limiting hole 213, that is, the first connection portion 421 is bent relative to the second connection portion 422 toward the rotor assembly 22, and the third connection portion 423 is bent relative to the second connection portion 422 toward the limiting hole 213. It can be understood that the bending direction of the first connection portion 421 is opposite to the bending direction of the third connection portion 423. It should be noted that when the sliding part 42 is limitedly connected to the valve seat 21, the sliding part 42 is made of non-elastic material or elastic material, and at least the third connection part 423 is located in the limiting hole 213 of the valve seat 21, that is, the limiting hole 213 limits the radial displacement of the third connection part 423, and the third connection part 423 is rotatable in the limiting hole 213; when the sliding part 42 is fixedly connected to the valve seat 21, that is, at least the third connection part 423 is fixed to the valve seat 21 by interference fit, welding, bonding, etc., at this time, the sliding part 42 is made of elastic material, and the sliding part 42 slides along the guide part by deformation.When the valve device is working, one of the first limit portion 4111 and the second limit portion 4112 of the guide groove 411 is the starting position of the sliding portion 42. For the convenience of explanation, it is defined that when the valve component 20 is closed, the sliding portion 42 is located at the first limit portion 4111 of the guide groove 411. When the valve device receives a signal, a predetermined current is passed through the coil assembly 11 to generate an excitation magnetic field, driving the rotor assembly 22 to rotate. The sliding portion 42 rotates with the rotor assembly 22 driven by the rotor assembly 22. The first connecting portion 421 of the sliding portion 42 slides along the guide portion 41. When the first connecting portion 421 of the sliding portion 42 slides to the second end portion 224, the sliding portion 42 stops moving, which will limit the continued movement of the rotor assembly 22. The position states of the sliding portion 42 at the first limit portion 4111 and the second limit portion 4112 are as shown. Figure 7 In the related art, the guide part is spiral, and the guide part is sleeved on the screw rod and arranged along the axial direction of the valve component. The stop assembly includes a spiral guide part, a slip ring and a push rod. The structure of the stop assembly in the present application is relatively simple, and the guide part is arranged along the radial direction of the valve component, which reduces the volume of the valve component to a certain extent.

[0039] Example 2

[0040] The difference between the embodiment 1 and the embodiment 2 of the present application is that the guide portion 41 is arranged at a different position. Figure 16-18 In this embodiment, the guide portion 41 is located on the valve seat 21 near the end of the rotor assembly 22, and the guide portion 41 is arranged along the radial direction of the valve device; the guide portion 41 and the valve seat 21 are an integral structure, which can be integrally formed, or the guide portion 41 and the valve seat 21 are a separate structure, and the guide portion 41 and the valve seat 21 are fixedly connected or limitedly connected. Specifically, the guide portion 41 and the valve seat 21 can be fixedly connected by welding or bonding, or the guide portion 41 and the valve seat 21 can be limitedly connected by clamping, plugging, etc. The guide portion 41 has a guide groove 411, and the guide groove 411 is arranged in a spiral shape along the radial direction of the guide portion 41, and at least part of the sliding portion 42 is located in the guide groove 411. The other end of the sliding portion 42 is limitedly connected to the rotor assembly 22, and specifically, the rotor assembly 22 includes a limiting hole 213, that is, the limiting hole 213 is located at the nut seat 222 of the rotor assembly 22, and the opening of the limiting hole 213 faces the valve seat 21.

[0041] The sliding portion 42 includes a first connection portion 421, a second connection portion 422, and a third connection portion 423. The second connection portion 422 is located between the first connection portion 421 and the second connection portion 422. At least a portion of the first connection portion 421 is located at the guide portion 41. The first connection portion 421 is bent relative to the second connection portion 422 toward the direction of the guide portion 41. The third connection portion 423 is bent relative to the second connection portion 422 toward the direction of the limiting hole 213. At least a portion of the first connection portion 421 is located at the guide groove 411 of the guide portion 41, and at least a portion of the second connection portion 422 is located at the limiting hole 213 of the rotor assembly 22.

[0042] Combination Figure 13-Figure 15 The present invention also provides an embodiment of an electric valve, the electric valve includes the aforementioned valve device. The electric valve includes a valve body 60, the valve body 60 has an installation cavity 61, part of the valve device is located in the installation cavity 61, the valve body 60 includes a first flow channel 62 and a second flow channel, the first flow channel 62 and the second flow channel are connected through the valve device, the valve device cooperates with the valve core assembly 23 and the valve port 212 to adjust the flow rate of the working medium between the first flow channel 62 and the second flow channel, and the working medium includes a refrigerant. In this embodiment, a first sealing ring 50 and a second sealing ring 51 are provided between the side wall forming the installation cavity 61 and the valve seat 21, and the first sealing ring 50 and the second sealing ring 51 are respectively placed on both sides of the valve port 212 to prevent leakage of the medium.

[0043] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve device, characterized in that: The invention comprises a rotor assembly (22), a valve seat (21), a guide portion (41) and a sliding portion (42); the guide portion (41) comprises a first limiting portion (4111) and a second limiting portion (4112); the guide portion (41) is arranged along the radial direction of the valve device; the guide portion (41) is located at one of the rotor assembly (22) and the valve seat (21); one end of the sliding portion (42) is slidably connected to the guide portion (41); the other end of the sliding portion (42) is limitedly connected or fixedly connected to the other of the rotor assembly (22) and the valve seat (21); when the sliding portion (42) abuts against one of the first limiting portion (4111) and the second limiting portion (4112), the rotor assembly (22) stops rotating.

2. The valve device according to claim 1, characterized in that The guide portion (41) has a guide groove (411), and the guide groove (411) has an opening along the axial direction of the valve device. One end portion of the sliding portion (42) is located in the guide groove (411).

3. The valve device according to claim 2, characterized in that Along the radial direction of the valve device, the first limiting portion (4111) is closer to the axis of the valve device relative to the second limiting portion (4112), and the guide groove (411) extends from the first limiting portion (4111) to the second limiting portion (4112) in a spiral shape.

4. The valve device according to any one of claims 1 to 3, characterized in that: The valve device comprises a limiting hole (213), and along the axial direction of the valve device, the limiting hole (213) is located at one of the valve seat (21) and the rotor assembly (22), the opening of the limiting hole (213) faces the guide portion (41), and the other end of the sliding portion (42) is located in the limiting hole (213).

5. The valve device according to claim 5, characterized in that The sliding portion (42) comprises a first connecting portion (421), a second connecting portion (422) and a third connecting portion (423); at least a portion of the first connecting portion (421) is located on the guiding portion (41); at least a portion of the third connecting portion (423) is located on the limiting hole (213); the first connecting portion (421) is bent relative to the second connecting portion (422) toward the guiding portion (41); and the third connecting portion (423) is bent relative to the second connecting portion (422) toward the limiting hole (213).

6. The valve device according to any one of claims 1 to 5, characterized in that: The valve device also includes a screw (24) and a sleeve (25), at least a portion of the rotor assembly (22) is located in the sleeve (25), and the sleeve (25) is fixedly connected to the valve seat (21); the rotor assembly (22) includes a nut seat (222) and a magnet (221), the nut seat (222) and the magnet (221) are fixedly connected or limit-connected or are an integral structure, the nut seat (222) includes a first mounting hole (226), at least a portion of the screw (24) is located in the first mounting hole (226), and the screw (24) is threadedly connected to the nut seat (222).

7. The valve device according to claim 6, characterized in that The valve device comprises a valve stem (232), a valve head (233) and a retaining ring (26); the valve stem (232) and the valve head (233) are fixedly connected or limit-connected or are an integral structure; the screw rod (24) comprises a second mounting hole (241); one end of the valve stem (232) passes through the second mounting hole (241); and along the axial direction of the valve device, at least a portion of the retaining ring (26) is located between the end of the valve stem (232) and the screw rod (24).

8. The valve device according to claim 7, characterized in that The valve seat (21) comprises a mounting groove (211), at least a portion of the screw rod (24) is located in the mounting groove (211), one of the valve seat (21) and the screw rod (24) has a limiting groove (242), and the other of the valve seat (21) and the screw rod (24) has a limiting protrusion (214), and at least a portion of the limiting protrusion (214) is located in the limiting groove (242).

9. The valve device according to claim 7, characterized in that A surface perpendicular to the axial direction of the valve device is defined as a first surface, and a projection of the mounting groove (211) on the first surface is non-circular.

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