Valve device

Abstract

The valve device comprises a guide part and a sliding part, the guide part is located on one of a rotor assembly and a supporting piece, 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 supporting piece; the guide part is arranged in the radial direction of the valve device, and the structure of the valve device is relatively simple.

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] The purpose of the present application is to provide a valve device with a relatively simple structure.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme, including a rotor assembly, a support member and a valve seat, the support member is fixedly connected or limit-connected to the valve seat; the valve device includes a guide portion and a sliding portion, the guide portion includes 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 support member, one end of the sliding portion is slidably connected to the guide portion, and the other end of the sliding portion is limit-connected or fixedly connected to the other one of the rotor assembly and the support member; when the sliding portion abuts against one of the first limit portion and the second limit portion, the rotor assembly stops rotating.

[0005] In an embodiment provided in the present application, the valve device includes a guide portion and a sliding portion, the guide portion is located at one of the rotor assembly and the support member, 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 support member; the guide portion is arranged along the radial direction of the valve device, and the structure of the valve device is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of a specific embodiment of the valve device;

[0007] Figure 2 is a schematic structural diagram of a valve component of a valve device;

[0008] Figure 3 is a schematic diagram of a stator component of a valve device;

[0009] Figure 4 is a schematic diagram of a rotor assembly of a valve device;

[0010] Figure 5 is a structural schematic diagram of a guide portion of a valve device;

[0011] Figure 6 is a schematic structural diagram of a sliding portion of a valve device;

[0012] Figure 7 is a schematic diagram of the operating position of the sliding portion of the valve device;

[0013] Figure 8 is a schematic diagram of the structure of the valve seat of the valve device;

[0014] Fig. 9 is a schematic diagram of a support member of a valve device;

[0015] Fig.10 for Fig. 9 A schematic diagram of the middle support member from another perspective;

[0016] Fig.11 A schematic diagram of the structure of the screw rod and valve core assembly of the valve device;

[0017] Fig.12 for Fig.11 Schematic diagram of part of the structure of the middle valve stem;

[0018] Fig.13 for Fig.11 Schematic diagram of another perspective of the middle screw;

[0019] Fig.14 It is a structural schematic diagram of the valve body;

[0020] Fig.15 The valve device is in the fully closed state.

[0021] Fig.16 This is the fully open state of the valve device.

[0022] The reference numerals in the figures are described as follows:

[0023] 10. stator component; 11. coil assembly; 12. injection molding part; 13. first accommodating cavity;

[0024] 20. Valve component; 21. Valve seat; 211. Mounting groove; 2111. First mounting cavity; 2112. Second mounting cavity; 212. Valve port; 22. Rotor assembly; 221. Magnet; 222. Nut seat; 223. First end portion; 224. Second end portion; 225. Slot cavity; 226. First mounting hole; 23. Valve core assembly; 231. Valve needle; 232. Valve stem; 2321. First limiting groove; 2322. First side wall portion; 2323. Second side wall portion; 233. Valve head; 234. Elastic element; 24. Screw rod; 241. Second mounting hole; 242. Second limiting groove; 25. Sleeve; 251. First opening portion; 252. First wall portion; 253. Second accommodating cavity; 26. Retaining ring; 261. Third limiting portion; 262. Fourth limiting portion;

[0025] 30. Support member; 31. Main body; 32. Flange; 33. Third mounting hole; 34. Position limiting protrusion; 35. Position limiting hole; 41. Guide; 411. Guide groove; 4111. First position limiting portion; 4112. Second position limiting portion; 42. Sliding portion; 421. First connecting portion; 422. Second connecting portion; 423. Third connecting portion;

[0026] 50. first sealing ring; 51. second sealing ring;

[0027] 60. Valve body; 61. Third installation cavity; 62. First flow channel; 63. Second flow channel. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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 16, 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.

[0031] 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, a valve seat portion and a valve seat mouth portion. The valve seat portion and the valve seat 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.

[0032] 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 . 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 limit-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 component 20, the nut seat 222 has a first end 223 and a second end 224, and the second end 224 is close to the valve seat 21 relative to the first end 223, and the sleeve 25 includes a first wall portion 252, and 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 the valve seat 21 or fits with a small gap. 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 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. The gap is set according to the actual product. Of course, in some embodiments, the rotor assembly can be axially limited by a bearing, and the bearing is located between the rotor assembly and the valve seat. As long as the rotor assembly can only rotate without axial movement, the axial movement of the rotor assembly here is not absolutely non-movable. Within the tolerance range, the rotor assembly can move up and down in a small range.

[0033] The nut seat 222 also includes a groove cavity 225, and the groove cavity 225 has an opening along the axial direction of the valve component 20, and the opening faces the first wall portion 252. The nut seat 222 includes a first mounting hole 226, and the first mounting hole 226 penetrates the bottom wall and the second end portion 224 of the groove cavity 225 along the axial direction of the valve component 20. At least part of the screw rod 24 is located in the 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. Specifically, 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 piece (carrying 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 connecting piece, the number of parts is relatively small, and the structure is simpler.

[0034] 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. The valve stem 232 and the valve head 233 are fixedly connected or limitedly connected or integrally structured. It can be understood that the fixed connection refers to connection by welding, bonding, interference fit, etc., and the limited connection refers to connection by clamping, plugging, 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, at least part of the retaining ring 26 is located between the end of the valve stem 232 and the screw rod 24. 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 first limiting groove 2321, which is located at the end of the valve stem 232 away from the valve head 233. In the radial direction of the valve device, the first limiting groove 2321 is recessed from the outer wall of the valve stem 232 to the direction away from the outer wall, and at least part of the retaining ring 26 is located in the first limiting groove 2321. In 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 first limiting groove 2321 includes a first side wall portion 2322 and a second side wall portion 2323. In the axial direction of the valve device, 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. In the axial direction of the valve device, 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 first limiting groove 2321, the fourth limiting portion 262 abuts against the second side wall portion 2323 of the first limiting 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 component 20, 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 limiting groove, 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.

[0035] In order to prevent the screw rod 24 from rotating when moving along the axial direction of the valve device, the valve component 20 of the present application further includes a support member 30, and the valve seat 21 includes a mounting groove 211. Along the axial direction of the valve device, the mounting groove 211 has an opening in the direction toward the rotor assembly, at least part of the support member 30 is located in the mounting groove 211, and the support member 30 is limitedly connected or fixedly connected to the valve seat 21. The support member 30 and the valve seat 21 can be fixed by welding, bonding, interference fit, etc., or limitedly connected by clamping, threading, etc. In this embodiment, the mounting groove 211 has a first mounting cavity 2111 and a second mounting cavity 2112. Along the radial direction of the support member 30, the second mounting cavity 2112 is located outside the first mounting cavity 2111. It can be understood that the surface perpendicular to the valve device is defined as the first surface, and the projections of the wall forming the first mounting cavity 2111 and the wall forming the second mounting cavity 2112 on the first surface do not overlap. The support member 30 includes a main body 31 and a flange 32. Along the radial direction of the support member 30, the flange 32 is located outside the main body 31, at least part of the main body 31 is located in the first mounting cavity 2111, and at least part of the flange 32 is located in the second mounting cavity 2112, thereby limiting the axial rotation of the support member 30. In some other embodiments, a plurality of flanges can be provided, and the flanges are provided along the circumference of the main body, and the second mounting cavity is provided opposite to the flanges.

[0036] The support member 30 includes a third mounting hole 33, which is located in the main body 31 and passes through the upper and lower ends of the main body 31, and at least part of the screw rod 24 is located in the third mounting hole 33. The first mounting hole 226 is coaxially or substantially coaxially arranged with the third mounting hole 33, and substantially coaxial means within the tolerance range. The support member 30 includes a limiting protrusion 34, which extends from the wall forming the third mounting hole 33 to the axial direction of the valve device along the radial direction of the valve device, and passes through the upper and lower ends of the main body 31 along the axial direction of the valve device. The screw rod 24 has a second limiting groove 242, which is located on the outer wall of the screw rod 24, and the second 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, and at least part of the limiting protrusion 34 is located in the second limiting groove 242, and the limiting protrusion 34 cooperates with the second limiting groove 242 to limit the rotation of the screw rod 24. Of course, in other embodiments, the limiting protrusion 34 and the second limiting groove 242 can be interchanged, that is, the limiting protrusion 34 is located on the screw rod 24, and the second limiting groove 242 is located on the support member 30. In some embodiments, the third mounting hole 33 is a non-circular hole, that is, the projection of the wall forming the third mounting hole 33 in a cross section perpendicular to the axial direction of the valve component 20 is non-circular, and the part of the screw rod 24 that matches the support member 30 matches the shape of the third mounting hole 33, thereby limiting the axial rotation of the screw rod 24.

[0037] The valve device further comprises 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 support member 30. 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 support member 30. 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. 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 lower end of the rotor assembly 22, that is, the guide portion 41 is located at the second end 224 of the nut seat 222, 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, the guide portion 41 and the rotor assembly 22 are fixedly connected, the guide portion 41 has a guide groove 411, along the axial direction of the valve device, the guide groove 411 has an opening, that is, the guide groove 411 is recessed from the second end 224 of the nut seat 222 toward the first end 223 of the nut seat 222, 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 close 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. 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 support member 30. The specific support member 30 has a limiting hole 35, which can be a blind hole or a through hole. Along the axial direction of the valve device, the opening of the limiting hole 35 faces the guide portion 41, and at least part of the sliding portion 42 is located in the limiting hole 35. The sliding portion 42 includes a first connecting portion 421, a second connecting portion 422 and a third connecting portion 423. The second connecting portion 422 is located between the first connecting portion 421 and the second connecting portion 422, at least part of the first connecting portion 421 is located in the guide groove 411, and at least part of the third connecting portion 423 is located in the limiting hole 35, that is, the first connecting portion 421 is bent relative to the second connecting portion 422 toward the direction of the guide portion, and the third connecting portion 423 is bent relative to the second connecting portion 422 toward the direction of the limiting hole 35. It can be understood that the bending direction of the first connecting portion 421 is opposite to the bending direction of the third connecting portion 423. It should be noted that when the sliding part 42 is limitedly connected to the support member 30, 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 35 of the support member 30, that is, the limiting hole 35 limits the radial displacement of the third connection part 423, and the third connection part 423 is rotatable in the limiting hole 35; when the sliding part is fixedly connected to the support member 30, that is, at least the third connection part 423 is fixed to the support member 30 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, and 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 limit portion 4112, 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 shown in the figure. In the related art, the guide part is spirally shaped, and the guide part is sleeved on the screw rod and arranged along the axial direction of the valve component. The stopping structure includes a spiral guide part, a slip ring and a push rod. In the present application, the structure of the guide part and the sliding part is relatively simple, and the manufacturing process is relatively simple. The guide part is arranged along the radial direction of the valve device, which reduces the volume of the valve component to a certain extent.

[0038] In some other embodiments, the guide portion 41 is located on the support member 30, and the limiting hole 35 is located on the rotor assembly 22; the guide portion 41 and the support member 30 are an integral structure, that is, the guide portion 41 is located at the upper end of the support member 30; or, the guide portion 41 and the support member 30 are separate structures, and the guide portion 41 is fixedly connected to the support member 30. Since the structures of the guide portion 41 and the limiting hole 35 are the same or similar to those described above, they are not described in detail.

[0039] Combination Figure 14-16 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 a third installation cavity 61, part of the valve device is located in the third installation cavity 61, the valve body 60 includes a first flow channel 62 and a second flow channel 63, the first flow channel 62 and the second flow channel 63 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 third 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.

[0040] 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 support member (30) and a valve seat (21), wherein the support member (30) is fixedly connected or limit-connected to the valve seat (21); the valve device comprises a guide portion (41) and a sliding portion (42), wherein the guide portion (41) comprises a first limit-connecting portion (4111) and a second limit-connecting portion (4112), wherein the guide portion (41) is arranged along the radial direction of the valve device, wherein the guide portion (41) is located at one of the rotor assembly (22) and the support member (30), wherein 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 limit-connected or fixedly connected to the other of the rotor assembly (22) and the support member (30); when the sliding portion (42) abuts against one of the first limit-connecting portion (4111) and the second limit-connecting portion (4112), the rotor assembly (22) stops rotating.

2. The valve device according to claim 1, characterized in that The guide portion (41) comprises 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 (35), and along the axial direction of the valve device, the limiting hole (35) is located at one of the support member (30) and the rotor assembly (22), the opening of the limiting hole (35) faces the guide portion (41), and the other end of the sliding portion (42) is located in the limiting hole (35).

5. The valve device according to claim 4, characterized in that The sliding portion (42) includes 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), and at least a portion of the third connecting portion (423) is located on the limiting hole (35). Along the axial direction of the valve device, the first connecting portion (421) is bent toward the guiding portion (41) relative to the second connecting portion (422), and the third connecting portion (423) is bent toward the limiting hole (35) relative to the second connecting portion (422).

6. The valve device according to any one of claims 1 to 5, characterized in that: The valve seat (21) includes a mounting groove (211), at least a portion of the support member (30) is located in the mounting groove (211), the mounting groove (211) has a first mounting cavity (2111) and a second mounting cavity (2112), along the radial direction of the valve device, the second mounting cavity (2112) is located on the outside of the first mounting cavity (2111), the support member (30) includes a main body (31) and a flange portion (32), along the radial direction of the valve device, the flange portion (32) is located on the outside of the main body (31), at least a portion of the main body (31) is located in the first mounting cavity (2111), at least a portion of the flange portion (32) is located in the second mounting cavity (2112), thereby limiting the axial rotation of the support member (30).

7. The valve device according to any one of claims 6, 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).

8. The valve device according to claim 7, 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).

9. The valve device according to claim 8, characterized in that The valve stem (232) has a first limiting groove (2321). Along the radial direction of the valve device, the first limiting groove (2321) is recessed from the outer wall of the valve stem (232) in a direction away from the outer wall of the valve stem (232). At least a portion of the retaining ring (26) is located in the first limiting groove (2321). Along the axial direction of the valve device, when the screw rod (24) moves upward, the upper end of the screw rod (24) abuts against the lower end of the retaining ring (26).

10. The valve device according to any one of claims 7 to 9, characterized in that: The support member (30) comprises a third mounting hole (33), at least a portion of the screw rod (24) is located in the third mounting hole (33), one of the support member (30) and the screw rod (24) has a second limiting groove (242), and the other of the support member (30) and the screw rod (24) has a limiting protrusion (34), and at least a portion of the limiting protrusion (34) is located in the second limiting groove (242).

11. The valve device according to any one of claims 7 to 9, characterized in that: The support member (30) comprises a third mounting hole (33), a surface perpendicular to the axial direction of the valve device is defined as a first surface, and a projection of a wall forming the third mounting hole (33) on the first surface is non-circular.

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