CN117759762A

CN117759762A - Electric valve

Info

Publication number: CN117759762A
Application number: CN202211129223.9A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2024-03-26

Abstract

The electric valve comprises a rotor assembly and a sleeve, and also comprises a detection device, wherein the detection device comprises a permanent magnet part and a limiting part, the limiting part is fixedly connected with the sleeve, the permanent magnet part is movably connected with the limiting part, or the permanent magnet part is fixedly connected with the limiting part, and the limiting part is movably connected with the sleeve; the permanent magnet component is provided with a first matching part, the rotor component comprises a second matching part, the first matching part is in transmission connection with the second matching part, and the rotor component can drive the permanent magnet component to rotate. This arrangement can simplify the structure associated with the installation of the permanent magnet assembly.

Description

Electric valve

Technical Field

The application relates to the technical field of fluid control, in particular to an electric valve.

Background

The motor-driven valve comprises a rotor component, a support, a spring, a rotating shaft, a sleeve, a permanent magnet and an angle sensor, wherein the angle sensor is positioned above the permanent magnet and used for detecting the rotating angle of the permanent magnet, the top of the sleeve is provided with the angle sensor and the permanent magnet, the rotor component is fixedly connected with the rotating shaft, the support is fixedly connected with the rotor component, the permanent magnet is matched with the spring through the support to prop the permanent magnet on the top of the sleeve, the permanent magnet rotates relative to the angle sensor and keeps the distance constant, the setting structure is relatively complex, and therefore, the relative structure of the permanent magnet installation is simplified, and the motor-driven valve is a technical problem to be considered by a person skilled in the art.

Disclosure of Invention

The purpose of the present application is to provide an electrically operated valve that can simplify the structure associated with the installation of permanent magnet components.

In order to achieve the above object, an embodiment of the present application adopts the following technical scheme:

an electric valve comprises a rotor component and a sleeve,

the electric valve further comprises a detection device, the detection device comprises a permanent magnet part and a limiting part, the limiting part is fixedly connected with the sleeve, the permanent magnet part is movably connected with the limiting part, or the permanent magnet part is fixedly connected with the limiting part, and the limiting part is movably connected with the sleeve;

the permanent magnet component is provided with a first matching part, the rotor component comprises a second matching part, the first matching part is in transmission connection with the second matching part, and the rotor component can drive the permanent magnet component to rotate.

Drawings

FIG. 1 is a schematic view of a first embodiment of an electrically operated valve according to the present application;

FIG. 2 is a schematic cross-sectional view of the electrically operated valve of FIG. 1 taken along the A-A plane;

FIG. 3 is a schematic cross-sectional structural view of one view of the valve member of FIG. 2;

FIG. 4 is an enlarged schematic view of the portion A in FIG. 3;

FIG. 5 is a schematic view of the combination of the detection device and rotor connection plate of FIG. 2;

FIG. 6 is a schematic elevational view of the rotor connection plate of FIG. 2;

FIG. 7 is a schematic cross-sectional view of the rotor connection plate of FIG. 6 taken along the B-B plane;

FIG. 8 is a perspective view of the permanent magnet assembly of FIG. 2;

FIG. 9 is a schematic elevational view of the permanent magnet assembly of FIG. 2;

FIG. 10 is a schematic cross-sectional view of the permanent magnet assembly of FIG. 9 taken along the C-C plane;

FIG. 11 is a schematic elevational view of the spacing member of FIG. 2;

FIG. 12 is a schematic cross-sectional view of a second embodiment of an electrically operated valve;

FIG. 13 is a schematic view of the valve assembly of FIG. 12 from one perspective;

FIG. 14 is an enlarged schematic view of the portion B of FIG. 13;

FIG. 15 is a schematic view of the combination of the detection device and rotor connection plate of FIG. 12;

FIG. 16 is a schematic cross-sectional view of the sensing device and rotor connection plate combination of FIG. 15 taken along the plane D-D;

FIG. 17 is a schematic perspective view of the permanent magnet assembly of FIG. 12;

FIG. 18 is a schematic elevational view of the permanent magnet assembly of FIG. 12;

fig. 19 is a schematic cross-sectional view of the permanent magnet assembly of fig. 18 taken along E-E.

Detailed Description

The present application is further described with reference to the accompanying drawings and specific examples:

referring to fig. 1-3, a first embodiment of an electric valve 100 is illustrated, where the electric valve 100 includes a valve body 1 (not shown), a coil assembly 2, and a valve member 3, a portion of the valve member 3 is disposed in the valve body 1, the valve member 3 is fixedly connected to the valve body 1, the connection manner includes a threaded connection, the coil assembly 2 is fixedly connected to the valve body 1, and the connection manner includes a screw connection. The coil assembly 2 comprises a stator assembly 21 and an injection molded body 22, the injection molded body 22 surrounding at least part of the stator assembly 21, the coil assembly 2 having a receiving cavity 221, the receiving cavity 221 having an opening in the injection molded body 22 towards the valve body 1. The valve member 3 includes a valve seat member 31, a rotor assembly 4, a nut assembly 34, and a sleeve 35, and the lower end portion of the sleeve 35 is connected to the valve seat member 31 by welding. At least part of the sleeve 35 is located in the receiving cavity 221, part of the sleeve 35 is located between the rotor assembly 4 and the stator assembly 21, part of the rotor assembly 4 is located inside the sleeve 35, and the stator assembly 21 is located outside the sleeve 35. In the present embodiment, the valve seat member 31 includes the first valve seat portion 311, the second valve seat portion 312, and the connection seat 313, and the first valve seat portion 311 and the second valve seat portion 312 are connected by the connection seat 313, and in other embodiments, the first valve seat portion 311 and the second valve seat portion 312 may be integrally formed. In the present embodiment, the rotor assembly 4 includes the rotor member 32 and the spool member 33, the rotor member 32 and the spool member 33 are fixedly connected, and the spool member 33 includes the valve core portion 331 and the screw portion 332, and the valve core portion 331 and the screw portion 332 are connected. The stator assembly 21 is supplied with a predetermined current to generate an excitation magnetic field, the rotor component 32 can rotate in the excitation magnetic field, the rotor component 32 drives the screw rod portion 332 to rotate, the screw rod portion 332 is in threaded fit with the nut assembly 34, the rotor component 32 drives the valve core portion 331 to act relative to the valve seat component 31, in this embodiment, the second valve seat portion 312 has a valve port 3121, and the screw rod portion 332 drives the valve core portion 331 to axially move relative to the valve port 3121 to adjust the flow area of the valve port 3121. For convenience of description, the upper and lower directions are the upper and lower directions of the drawings in the drawings of the specification, the upper and lower directions only represent relative positions, and the direction indicated by a broken line Z of the electric valve in FIG. 2 is the axial direction of the electric valve in the application.

Referring to fig. 1 to 5, the electric valve 100 further includes a detecting device 6, where the detecting device 6 includes a permanent magnet component 61 and a limiting component 62, the limiting component 62 is fixedly connected with the sleeve 35, the permanent magnet component 61 is movably connected with the limiting component 62, or the permanent magnet component 61 is fixedly connected with the limiting component 62, and the limiting component 62 is movably connected with the sleeve 35;

the permanent magnet component 61 has a first mating portion 6122, the rotor assembly 4 includes a second mating portion 36, the first mating portion 6122 is in transmission connection with the second mating portion 36, and the rotor assembly 4 can drive the permanent magnet component 61 to rotate. By such arrangement, the position-limiting member 62 is simple in structure and convenient to process, and the position of the permanent magnet member 61 can be defined by a relatively simple structure, which is advantageous in simplifying the installation structure of the permanent magnet member 61.

The rotor assembly 4 further includes a rotor connecting plate 321, and the screw portion 332 is fixedly connected with the rotor connecting plate 321, where the connection manner may be welding or interference fit. The electric valve 100 further includes an angle sensor 5, the sleeve 35 includes a sleeve top 351, the sleeve top 351 is located between the angle sensor 5 and the permanent magnet part 61, the limiting part 62 limits a lowermost position of the permanent magnet part 61, and the sleeve top 351 defines an uppermost position of the permanent magnet part 61; the rotor connecting plate 321 or the screw rod portion 332 has a second mating portion 36 mated with the first mating portion 6122, and the rotor assembly 4 can rotate the permanent magnet component 61. The angle sensor 5 is located above the permanent magnet part 61, and the distance between the permanent magnet part 61 and the angle sensor 5 is constant, so that the angle sensor 5 can more accurately detect the magnetic pole change of the permanent magnet part 61. Referring to fig. 2 to 5, in fig. 11, the stopper 62 is fixedly connected to the sleeve top 351. The limiting member 62 includes an extending portion 621, an intermediate portion 622, and a flange portion 623, wherein the outer diameter of the extending portion 621 is smaller than the outer diameter of the intermediate portion 622, and the outer diameter of the flange portion 623 is larger than the outer diameter of the intermediate portion 622, and in other embodiments, the outer diameter of the extending portion 621 may be the same as the outer diameter of the intermediate portion 622. The sleeve top 351 has a first hole 3511, the first hole 3511 runs through the sleeve top 351 along the axis direction of the electric valve 100, at least part of the extension portion 621 is located in the first hole 3511, the upper end of the middle portion 622 is abutted with the sleeve top 351, the extension portion 621 is welded with the sleeve top 351 and sealed, and one end of the limiting component 62 is fixedly connected with the sleeve top 351. The first hole 3511 is matched with the extending part 621, so that the relative positions of the sleeve 35 and the limiting part 62 can be conveniently positioned, the welding positions of the extending part 621 and the sleeve top 351 can be accurately determined, and meanwhile, the working medium can be prevented from leaking through the sealing of the welding part. In other embodiments, the first hole 3511 may not penetrate the sleeve top 351, i.e., the inner wall of the sleeve top 351 has a slot, and the extension 621 at least partially enters the slot, and the extension 621 is welded to the sleeve top 351. The sleeve top 351 defines the uppermost position of the permanent magnet assembly 61. Referring to fig. 2 to 5 and fig. 8 to 10, the permanent magnet part 61 includes a permanent magnet 611 and a connection portion 612, the permanent magnet 611 is closer to the angle sensor 5 than the connection portion 612, and the permanent magnet 611 and the connection portion 612 may be of an integral structure, for example, may be integrally injection-molded with a magnetic material, so that the permanent magnet part 61 may be easily manufactured. In other embodiments, the permanent magnet 611 may be made of a magnetic material, the connecting portion 612 may be made of a magnetic material or a non-magnetic material, and the two may be fixedly connected. The limiting member 62 is movably connected with the permanent magnet member 61, and the other end of the limiting member 62 abuts against the permanent magnet member 61. The permanent magnet member 61 includes a first through hole 6111, the first through hole 6111 penetrates the permanent magnet 611 and the connection portion 612 in the axial direction of the permanent magnet member 61, at least a part of the intermediate portion 622 is located in the first through hole 6111, the intermediate portion 622 is in clearance fit with a wall forming the first through hole 6111, the outer diameter of the flange portion 623 is larger than that of the first through hole 6111, the lower end portion of the connection portion 612 abuts against the upper end portion of the flange portion 623, and the lowermost end position of the permanent magnet member 61 is restricted.

In other embodiments, the permanent magnet component 61 may be fixedly connected to the limiting component 62, and the limiting component 62 is movably connected to the sleeve 35. The electric valve 100 may include a bearing, where one end of the limiting member 62 near the sleeve 35 is movably connected with the bearing, and the bearing portion is welded and fixed with the sleeve 35, so that the limiting of the permanent magnet member 61 can be achieved, and the related installation structure of the permanent magnet member 61 is simplified.

Referring to fig. 2-7, the rotor assembly 4 further includes a magnetic rotor 322, and a rotor connecting plate 321 is fixedly connected with the magnetic rotor 322, where the connection manner may be injection molding connection or clamping connection. The rotor connecting plate 321 includes a body portion 3211 and a protrusion portion 3212, the protrusion portion 3212 is protruding from the body toward the direction where the sleeve top 351 is located, the rotor connecting plate 321 has a second hole 3213, and the second hole 3213 penetrates the protrusion portion 3212. The screw portion 332 includes a first end portion 3321, at least a portion of the first end portion 3321 is located in the second hole 3213, and in this embodiment, at least a portion of the first end portion 3321 is exposed out of the boss 3212, so that welding and fixing of the first end portion 3321 and the boss 3212 may be facilitated. In other embodiments, the first end 3321 may not extend beyond the boss 3212. The screw rod portion 332 is fixedly connected with the protruding portion 3212, and fixing can be achieved through interference fit, welding, adhesive or the like.

Referring to fig. 2-3, the electric valve 100 further includes an electric control portion 7, the electric control portion 7 includes an electric control box 71 and an electric control plate 72, the electric control plate 72 is located in a cavity formed by the electric control box 71, the electric control plate 72 and the electric control box 71 are limited, the angle sensor 5 is disposed on the electric control plate 72 and located at the lower end of the electric control plate 72, and the angle sensor 5 is fixedly connected with the electric control plate 72 and electrically connected and/or signal connected. This arrangement can simplify the mounting structure of the electric control section 7. In other embodiments, the electronic control box 71 is provided with a small electronic control board, and the angle sensor 5 is fixed on the small electronic control board, which may be welded and fixed, and a traction wire is connected between the small electronic control board and the electronic control board. The angle sensor 5 is electrically and/or signally connected with the electric control board 72, the angle sensor 5 senses the magnetic pole change of the permanent magnet 611, so that the rotating angle of the magnetic rotor 322 is judged and detected, and the electric control board 72 or an upper computer judges the position or the motion state of the magnetic rotor 322 according to the rotating angle, so as to judge whether the valve is closed in place or whether faults such as locked rotation occur or not.

Referring to fig. 2-4, the angle sensor 5 is installed above the permanent magnet 611, in this embodiment, the angle sensor 5 is located directly above the permanent magnet 611, and the angle sensor 5 can sense the magnetic pole change of the permanent magnet 611 more sensitively, so as to determine and detect the rotation angle of the magnetic rotor 322. Of course, in other embodiments, the mounting location may also be within a range corresponding to the axial projection of the permanent magnet 611. The limiting member 62 limits the lowermost position of the permanent magnet member 61, the sleeve top 351 defines the uppermost position of the permanent magnet member 61, and the distance between the permanent magnet 611 and the angle sensor 5 is maintained relatively constant, including substantially constant, which allows for a certain error and can also move up and down within a certain range while satisfying the detection accuracy of the angle sensor. The limiting member 62 has a simple structure, is convenient to process, can define the position of the permanent magnet member 61 by a relatively simple structure, and is advantageous in simplifying the installation structure of the permanent magnet member 61. The angle sensor 5 senses the magnetic pole change of the permanent magnet 611, so that the rotation angle of the magnetic rotor 322 is judged and detected, the electric control board 72 or an upper computer judges the position or the motion state of the magnetic rotor 322 according to the rotation angle, and further judges whether the valve is closed in place or whether faults such as locked rotation occur or not, the distance between the permanent magnet 611 and the angle sensor 5 is kept relatively constant, and the detection precision can be improved.

2-5 and 8, the permanent magnet component 61 has a first matching portion 6122, the first matching portion 6122 is located at a connecting portion 612, the rotor connecting plate 321 or the screw rod portion 332 has a second matching portion 36 matched with the first matching portion 6122, the first matching portion 6122 and the second matching portion 36 are in transmission connection, the transmission connection comprises meshing connection, the first matching portion 6122 is in a gear structure, and the second matching portion 36 matched with the first matching portion 6122 is in a gear structure; or the first engagement portion 6122 is a screw structure, and the second engagement portion 36 engaged with the first engagement portion 6122 is a screw structure. In this embodiment, the first matching portion 6122 is located on the outer peripheral wall of the connecting portion 612, and the first matching portion 6122 is of a gear structure. The rotor connecting plate 321 has a second mating portion 36, in this embodiment, the second mating portion 36 is located on the outer peripheral wall of the protruding portion 3212, the second mating portion 36 is of a gear structure, the first mating portion 6122 is in transmission connection with the second mating portion 36 through the gear structure, the protruding portion 3212 drives the permanent magnet component 61 to rotate, and the gear structure is arranged to facilitate machining and assembly. In other embodiments, the first mating portion 6122 may also be a threaded structure, and the second mating portion is also a threaded structure, through which the first mating portion 6122 and the second mating portion 36 are drivingly connected. The bulge portion 3212 rotates to drive the connection portion 612 to rotate, the connection portion 612 drives the permanent magnet component 61 to move, the angle sensor 5 senses magnetic pole changes of the permanent magnet 611, and accordingly the rotating angle of the magnetic rotor 322 is detected, and the electric control board 72 or the upper computer judges the position or the moving state of the magnetic rotor 322 according to the rotating angle, and further judges whether a valve is closed in place or whether the valve is blocked. The arrangement can simplify the installation structure of the permanent magnet part 61, and the limit part 62 can be arranged at any circumferential position deviating from the axial direction of the electric valve 100, and the first matching part 6122 and the second matching part 36 are connected through transmission, so that the installation position of the permanent magnet part 61 can be conveniently and flexibly selected according to the requirement. In other embodiments, the second engaging portion 36 may be further disposed on the screw portion 332, the first end portion 3321 at least partially exposes the protruding portion 3212, and the second engaging portion 36 is disposed on the outer peripheral wall of the first end portion 3321 and has a gear structure. The first matching portion 6122 is located on the outer peripheral wall of the connecting portion 612, the first matching portion 6122 disposed on the outer peripheral wall of the connecting portion 612 is of a gear structure, and the first matching portion 6122 is in gear connection with the second matching portion 36. In other embodiments, the second mating portion 36 may also have a threaded structure, the first mating portion 6122 may also have a threaded structure, and the first mating portion 6122 and the second mating portion 36 are in threaded connection, and the screw portion 332 drives the permanent magnet member 61 to rotate.

Referring to fig. 12-19, a second embodiment of an example electrically operated valve 100 is illustrated in which the stop member 62 is disposed coaxially with the axis of the electrically operated valve 100. The limiting member 62 is fixedly connected with the sleeve 35. The limiting member 62 includes an extending portion 621, an intermediate portion 622, and a flange portion 623, wherein the outer diameter of the extending portion 621 is smaller than the outer diameter of the intermediate portion 622, and the outer diameter of the flange portion 623 is larger than the outer diameter of the intermediate portion 622, and in other embodiments, the outer diameter of the extending portion 621 may be the same as the outer diameter of the intermediate portion 622. The sleeve top 351 has first hole 3511, and first hole 3511 runs through sleeve top 351 along the axis direction of motorised valve 100, and at least part extension 621 is located first hole 3511, the upper end and the sleeve top 351 butt of intermediate part 622, extension 621 and sleeve top 351 welded fastening and sealing set up first hole 3511 and extension 621 cooperation, can conveniently fix a position sleeve 35 and the relative position of limiting part 62, accurately confirm the welded position of extension 621 and sleeve top 351, pass through the welded part sealing simultaneously, can avoid working medium to reveal. In other embodiments, the first hole 3511 may not penetrate the sleeve top 351, i.e., the inner wall of the sleeve top 351 has a slot, and the extension 621 at least partially enters the slot, and the extension 621 is welded to the sleeve top 351. The sleeve top 351 defines the uppermost position of the permanent magnet assembly 61.

Referring to fig. 16 to 19, the stopper 62 is movably connected with the permanent magnet 61. The permanent magnet member 61 includes a permanent magnet 611 and a connection portion 612, the permanent magnet 611 includes a first through hole 6111, the connection portion 612 includes a second through hole 6121, the first through hole 6111 and the second through hole 6121 are communicated and coaxially arranged, an outer diameter of the first through hole 6111 is smaller than an outer diameter of the second through hole 6121, at least a part of the middle portion 622 is located in the first through hole 6111 and the second through hole 6121, the middle portion 622 is in clearance fit with a wall forming the first through hole 6111, an outer diameter of the flange portion 623 is larger than an outer diameter of the first through hole 6111 and smaller than an outer diameter of the second through hole 6121, a lower end portion of the permanent magnet 611 is abutted to an upper end portion of the flange portion 623, and a lowermost end position of the permanent magnet member 61 is limited.

In other embodiments, the permanent magnet component 61 may be fixedly connected to the limiting component 62, and the limiting component 62 is movably connected to the sleeve 35. The electric valve can comprise a bearing, one end of the limiting component 62, which is close to the sleeve 35, is movably connected with the bearing, and the bearing part is fixedly welded with the sleeve 35, so that the limiting of the permanent magnet component 61 can be realized by the arrangement, and the related installation structure of the permanent magnet component 61 is simplified.

Referring to fig. 12-14, the angle sensor 5 is installed above the permanent magnet 611, in this embodiment, the angle sensor 5 is located directly above the permanent magnet 611, and the angle sensor 5 can sense the magnetic pole change of the permanent magnet 611 more sensitively, so as to determine and detect the rotation angle of the magnetic rotor 322. Of course, in other embodiments, the mounting location may also be within a range corresponding to the axial projection of the permanent magnet 611. The limiting member 62 limits the lowest position of the permanent magnet member 61, the sleeve top 351 defines the highest position of the permanent magnet member 61, the distance between the permanent magnet 611 and the angle sensor 5 is maintained relatively constant, and the constant includes approximately constant, so that a certain error can be allowed, and the detection accuracy can be improved by maintaining the distance between the upper and lower movable permanent magnets 611 and the angle sensor 5 relatively constant within a certain range on the premise of meeting the detection accuracy of the angle sensor 5. The limiting member 62 has a simple structure, is convenient to process, can define the position of the permanent magnet member 61 by a relatively simple structure, and is advantageous in simplifying the installation structure of the permanent magnet member 61.

Referring to fig. 13 to 17, the connecting portion 612 has a first mating portion 6122, where the first mating portion 6122 is disposed on a wall forming a second through hole 6121, and in this embodiment, the first mating portion 6122 is in a gear structure. The rotor connecting plate 321 includes a body portion 3211 and a protrusion portion 3212, the protrusion portion 3212 is protruding from the body toward the direction where the sleeve top 351 is located, the rotor connecting plate 321 has a second hole 3213, and the second hole 3213 penetrates the protrusion portion 3212. The screw portion 332 includes a first end portion 3321, at least a portion of the first end portion 3321 is located in the second hole 3213, and in this embodiment, at least a portion of the first end portion 3321 is exposed out of the boss 3212, so that welding and fixing of the first end portion 3321 and the boss 3212 may be facilitated. The outer peripheral wall of the protruding portion 3212 has a second mating portion 36, the second mating portion 36 is also in a gear structure, the first mating portion 6122 is in gear connection with the second mating portion 36, and the protruding portion 3212 drives the connecting portion 612 to rotate. The gear structure is convenient to process, and the installation and the matching are convenient. The limiting member 62 is coaxially arranged with the axis of the electric valve 100, and the first matching portion 6122 and the second matching portion 36 are in transmission connection, so that the installation structure of the permanent magnet member 61 is simpler. In other embodiments, the first mating portion 6122 may also be a threaded structure, and the second mating portion is also a threaded structure, through which the first mating portion 6122 and the second mating portion 36 are drivingly connected. In other embodiments, the first end portion 3321 has a second engaging portion 36, the second engaging portion 36 is disposed on an outer peripheral wall of the first end portion 3321, and has a gear structure, the first engaging portion 6122 is located on a wall forming the second through hole 6121, the first engaging portion 6122 has a gear structure, the first engaging portion 6122 is in gear connection with the second engaging portion 36, and the screw portion 332 rotates to drive the permanent magnet member 61 to rotate. In other embodiments, the first matching portion 6122 may be a threaded structure, the second matching portion 36 is also a threaded structure, the first matching portion 6122 and the second matching portion 36 are connected through a threaded transmission, and the screw rod portion 332 drives the permanent magnet component 61 to rotate.

It should be noted that: the above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application may be modified or substituted by equivalents thereof, and all technical solutions and modifications that do not depart from the spirit and scope of the present application are intended to be covered by the claims of the present application.

Claims

1. An electrically operated valve (100) comprising a rotor assembly (4) and a sleeve (35), characterized in that,

the electric valve (100) further comprises a detection device (6), the detection device (6) comprises a permanent magnet component (61) and a limiting component (62), the limiting component (62) is fixedly connected with the sleeve (35), the permanent magnet component (61) is movably connected with the limiting component (62), or the permanent magnet component (61) is fixedly connected with the limiting component (62), and the limiting component (62) is movably connected with the sleeve (35);

the permanent magnet component (61) is provided with a first matching part (6122), the rotor assembly (4) comprises a second matching part (36), the first matching part (6122) is in transmission connection with the second matching part (36), and the rotor assembly (4) can drive the permanent magnet component (61) to rotate.

2. The electrically operated valve according to claim 1, wherein the rotor assembly (4) comprises a spool part (33), the spool part (33) comprising a screw rod part (332), the rotor assembly (4) further comprising a rotor connection plate (321), the screw rod part (332) being fixedly connected with the rotor connection plate (321), the electrically operated valve further comprising an angle sensor (5), the sleeve (35) comprising a sleeve top (351), the sleeve top (351) being located between the angle sensor (5) and the permanent magnet part (61), the limiting part (62) limiting a lowermost position of the permanent magnet part (61), the sleeve top (351) defining an uppermost position of the permanent magnet part (61);

the rotor connecting plate (321) or the screw rod part (332) is provided with a second matching part (36) matched with the first matching part (6122);

the angle sensor (5) is located above the permanent magnet part (61), and the distance between the permanent magnet part (61) and the angle sensor (5) is constant.

3. The electrically operated valve according to claim 2, characterized in that the permanent magnet part (61) comprises a permanent magnet (611) and a connecting portion (612), the permanent magnet (611) is closer to the angle sensor (5) than the connecting portion (612), the first mating portion (6122) is located at the connecting portion (612), the permanent magnet (611) and the connecting portion (612) are of an integral structure or the permanent magnet (611) and the connecting portion (612) are respectively formed and then fixedly connected.

4. The electric valve (100) according to claims 1-3, characterized in that the first mating portion (6122) is of a gear structure, and the second mating portion (36) mated with the first mating portion (6122) is of a gear structure; or the first matching part (6122) is in a threaded structure, and the second matching part (36) matched with the first matching part is in a threaded structure.

5. The electrically operated valve (100) according to claim 4, wherein one end of the limiting member (62) is fixedly connected to the sleeve top (351), and the other end of the limiting member (62) abuts against the permanent magnet member (61) to limit the lowermost end position of the permanent magnet member (61).

6. The electrically operated valve (100) according to claim 4 or 5, wherein the limiting member (62) comprises an extending portion (621), a middle portion (622) and a flange portion (623), the outer diameter of the extending portion (621) is smaller than the outer diameter of the middle portion (622), the outer diameter of the flange portion (623) is larger than the outer diameter of the middle portion (622), the sleeve top (351) has a first hole (3511), the first hole (3511) penetrates the sleeve top (351) in the axial direction of the electrically operated valve (100), at least part of the extending portion (621) is located in the first hole (3511), the upper end portion of the middle portion (622) is abutted with the sleeve top (351), and the extending portion (621) is welded and fixed with the sleeve top (351).

7. The electrically operated valve (100) according to claim 6, wherein the permanent magnet member (61) includes a first through hole (6111), the first through hole (6111) penetrates the permanent magnet (611) and the connection portion (612) in an axial direction of the permanent magnet member (61), at least a part of the intermediate portion (622) is located at the first through hole (6111), the intermediate portion (622) is in clearance fit with a wall forming the first through hole (6111), an outer diameter of the flange portion (623) is larger than an outer diameter of the first through hole (6111), a lower end portion of the connection portion (612) abuts against an upper end portion of the flange portion (623), a lowermost end position of the permanent magnet member (61) is restricted, the permanent magnet member (61) abuts against the sleeve top portion (351), and an uppermost end position of the permanent magnet member (61) is restricted.

8. The electric valve (100) according to claim 7, wherein the stopper member (62) is provided offset from an axial direction of the electric valve (100), and the first engagement portion (6122) is located at an outer peripheral wall of the connecting portion (612); the rotor connecting plate (321) comprises a body part (3211) and a protruding part (3212), the protruding part (3212) protrudes from the body part (3211) towards the direction where the sleeve top (351) is located, the rotor connecting plate (321) is provided with a second hole (3213), the second hole (3213) penetrates through the protruding part (3212), the screw rod part (332) comprises a first end part (3321), at least part of the first end part (3321) is located in the second hole (3213), the screw rod part (332) is fixedly connected with the first end part (3321), and the second matching part (36) is located on the outer peripheral wall of the protruding part (3212); the first matching part (6122) is in transmission connection with the second matching part (36), and the protruding part (3212) drives the connecting part (612) to rotate.

9. The electrically operated valve (100) according to claim 6, characterized in that the permanent magnet (611) comprises a first through hole (6111), the connecting portion (612) comprises a second through hole (6121), the first through hole (6111) and the second through hole (6121) are communicated and coaxially arranged, the outer diameter of the first through hole (6111) is smaller than the outer diameter of the second through hole (6121), at least part of the middle portion (622) is positioned at the first through hole (6111) and the second through hole (6121), the middle portion (622) is in clearance fit with a wall forming the first through hole (6111), the outer diameter of the flange portion (623) is larger than the outer diameter of the first through hole (6111) and smaller than the outer diameter of the second through hole (6121), the lower end portion of the permanent magnet (611) is abutted with the upper end portion of the flange portion (623), the lowest end position of the permanent magnet member (61) is limited, and the top portion (61) of the permanent magnet member (351) is abutted with the uppermost position.

10. The electric valve according to claim 9, characterized in that the limiting member (62) is provided coaxially with the axis of the electric valve (100), and the first fitting portion (6122) is located at an inner peripheral wall of the connecting portion (612); the rotor connecting plate (321) comprises a body part (3211) and a protruding part (3212), the protruding part (3212) protrudes from the body part (3211) towards the direction where the sleeve top (351) is located, the rotor connecting plate (321) is provided with a second hole (3213), the second hole (3213) penetrates through the protruding part (3212), the screw rod part (332) comprises a first end part (3321), at least part of the first end part (3321) is located in the second hole (3213), the screw rod part (332) is fixedly connected with the first end part (3321), and the second matching part (36) is located on the outer peripheral wall of the protruding part (3212); the first matching part (6122) is in transmission connection with the second matching part (36), and the protruding part (3212) drives the connecting part (612) to rotate.

11. The electrically operated valve (100) according to claim 8 or 10, wherein the electrically operated valve (100) further comprises an electrical control part (7), the electrical control part (7) comprises an electrical control box (71) and an electrical control plate (72), the electrical control plate (72) is located in a cavity formed by the electrical control box (71), the electrical control plate (72) is limited with the electrical control box (71), and the angle sensor (5) is fixedly connected with the electrical control plate (72) and electrically connected and/or signal connected.