CN114041025A

CN114041025A - Electric valve

Info

Publication number: CN114041025A
Application number: CN202080017088.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2019-11-20
Filing date: 2020-05-27
Publication date: 2022-02-11
Also published as: CN211738083U

Abstract

The utility model provides an electrically operated valve, includes casing part (4), valve body part (3), and casing part (4) and valve body part (3) fixed connection, control unit include motor (11), and the inner chamber of casing part (4) is located in control unit (1), for background art, can reduce the influence of steam to motor (11).

Description

Electric valve

The present application claims priority of chinese patent office with application number 201920938666.X entitled "an electric valve" filed on 21/06/21/2019, and chinese patent application with application number 201922013399.8 entitled "an electric valve" filed on 20/11/2019, which are incorporated herein by reference in their entireties.

Technical Field

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

Background

Fig. 1 is a cross-sectional schematic view of a prior art electric valve. As shown in fig. 1, the electric valve includes a cover 01, a valve body 02, a coil 03, and a rotor 04, the cover 01 and the valve body 02 are welded and fixed, the rotor 04 is disposed in the cover 01, and the coil 03 is disposed outside the cover 01. In this structure, since the coil 03 is always exposed to the environment, short-circuit damage may be caused by moisture in the environment.

Therefore, how to reduce the influence of moisture in the environment on the coil provides an improved subject for those skilled in the art.

Disclosure of Invention

The invention aims to provide an electric valve, which comprises a shell component, a valve body component, a control component and a gear reduction mechanism, wherein the shell component is fixedly connected with the valve body component; the control component and the gear reduction mechanism are arranged in an inner cavity of the shell component, the control component comprises a motor and an input gear, the motor is rotationally connected with the input gear, a stator and a rotor of the motor are positioned above the gear reduction mechanism, the gear reduction mechanism comprises a planetary gear and an output gear carrier, the input gear is meshed with the planetary gear, and the planetary gear can drive the output gear carrier to rotate; the valve body component comprises a valve body, a first valve seat, a valve core and a transmission shaft, the valve body is fixedly connected with the first valve seat, the valve core is arranged in an inner cavity of the valve body component, the output gear carrier is rotatably connected with the transmission shaft, and the transmission shaft is rotatably connected with the valve core.

According to the electric valve provided by the invention, the shell component is fixedly connected with the valve body component, the control component comprises the motor, and the control component is arranged in the inner cavity of the shell component, so that the influence of water vapor on the motor can be reduced compared with the background technology.

Drawings

FIG. 1: a cross-sectional schematic view of an electrically operated valve is given in the background art;

FIG. 2: the invention provides a section schematic diagram of an electric valve;

FIG. 3: FIG. 2 is a schematic view of the connector assembly;

FIG. 4 a: FIG. 2 is a schematic view of the separator;

FIG. 4 b: the structure of the gear ring in FIG. 2 is schematic;

FIG. 5: FIG. 2 is a schematic view of the output carrier;

FIG. 6: FIG. 2 is a schematic view of the bearing member;

FIG. 7: FIG. 2 is a schematic view of the engagement of the gear ring, the output carrier and the bearing member;

FIG. 8: FIG. 2 is a schematic cross-sectional view of a propeller shaft;

FIG. 9: the structure of another bearing piece is schematically shown;

FIG. 10 a: the invention provides a partial section schematic view of a second electric valve;

FIG. 10 b: FIG. 10a is a schematic view of the combination of the rotating shaft, the transmission rod and the input gear;

FIG. 11: the invention provides a partial section schematic diagram of a third electric valve;

FIG. 12: FIG. 11 is a schematic view of the valve body;

FIG. 13: fig. 11 is a schematic view of the structure of the bearing member.

In fig. 2 to 13:

1-a control component;

11/11 '-motor, 111/111' -rotating shaft;

112/112 '-input gear, 1120/1120' -sun gear;

1121-large diameter section, 1122-small diameter section, 1123-groove;

1124-groove wall, 1125-convex ring;

113-stator, 114-rotor, 115-upper bearing, 116-lower bearing;

117-drive bar, 1171-sidewall portion, 12-lead, 13-mounting plate, 130-notch;

2-a gear reduction mechanism;

21-planetary gear, 22-planetary carrier, 221-first stage planetary carrier;

2210-center through hole, 23-positioning rod;

24-partition, 240-communication flow path, 241-center hole;

242-through hole, 243-radial through groove and 244-annular groove;

25-gear ring, 250-inner cavity of gear ring, 251-limit groove;

26-output carrier, 261-disk-shaped body portion;

262-hole, 263-protrusion;

27/27A/27B-bearing piece, 271/271A-cylindrical portion, 272/272A-radial extension;

273A-axial extension, 274/274 a-axial through slot, 275-cutout;

3/3A-valve body member, 30-inner chamber of valve body member, 31/31A-valve body;

311/311A-body portion, 312/312A-extension;

313-limit boss, 314-concave part;

3120A axial through hole, 32-valve core, 321-groove;

33/33A-first seat, 33' -second seat;

34-a transmission shaft, 341-a first bonding part, 342-a second bonding part and 343-a blind hole;

36-first connection pipe, 37-second connection pipe;

4-housing part, 40-inner cavity of housing part, 401-upper cavity;

41-upper shell, 411-projection;

42-lower shell, 421-second step part, 422-reducing part;

5-connector element, 51-socket;

511-upper section, 5110-plug cavity and 512-middle section;

513-lower section, 5130-sealing cavity, 514-first step section;

52-sealing glass, 53-pins.

Detailed Description

The core of the invention is to provide an electric valve, a valve body component is fixedly connected with a shell component, a valve cavity of the electric valve comprises an inner cavity of the shell component and an inner cavity of the valve body component, the inner cavity of the shell component is communicated with the inner cavity of the valve body component, a control component comprises a motor, and the control component is arranged in the inner cavity of the shell component. Compared with the background art, the influence of water vapor on the motor can be reduced.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that the terms "upper" and "lower" as used herein are defined in the drawings and the positions of the components in fig. 2 to 13, respectively, only for the sake of clarity and convenience. It is to be understood that the directional terms used herein are not intended to limit the scope of the claims.

It should be noted that "rotation" referred to herein means a movement in a circumferential direction, and includes both a movement of one rotation (360 °) or more and a movement of one rotation (360 °) or less.

FIG. 2 is a schematic cross-sectional view of an electrically operated valve provided in the present invention; FIG. 3 is a schematic view of the connector assembly of FIG. 2; FIG. 4a is a schematic structural view of the separator of FIG. 2; FIG. 4b is a schematic structural view of the gear ring of FIG. 2; FIG. 5 is a schematic structural view of the output carrier of FIG. 2; FIG. 6 is a schematic view of the bearing member of FIG. 2; FIG. 7 is a schematic view of the combination of the ring gear, the output carrier and the bearing member of FIG. 2; fig. 8 is a cross-sectional view of the propeller shaft of fig. 2.

The electric valve includes a control member 1, a gear reduction mechanism 2, a valve member 3, and a housing member 4. The valve chamber of the electric valve comprises an inner chamber 30 of the body member and an inner chamber 40 of the housing member, the inner chamber 30 of the body member and the inner chamber 40 of the housing member being in communication. The control member 1 and the gear reduction mechanism 2 are provided in the cavity 40 of the housing member.

The control unit 1 includes a motor 11, a lead wire 12, and a mounting plate 13. The motor 11 includes a stator 113, a rotor 114, a rotation shaft 111, an input gear 112, and an upper bearing 115 and a lower bearing 116 to position the rotation shaft 111. The stator 113 and the rotor 114 are located above the gear reduction mechanism 2. The lower bearing 116 is close to the input gear 112, and the rotating shaft 111 penetrates through the lower bearing 116. When the lead wires 12 are energized, the stator 113 is energized to drive the rotor 114 to rotate circumferentially, and the rotor 114 is fixedly connected to the rotating shaft 111. The shaft 111 is machined from stainless steel rod stock and is rotatably connected to the input gear 112. The term "rotationally coupled" herein includes that the rotating shaft 111 is fixedly coupled to the input gear 112, and also includes that the rotating shaft 111 is circumferentially limited and coupled to the input gear 112, as long as the rotating shaft 111 can drive the input gear 112 to rotate. Specifically, the rotating shaft 111 and the input gear 112 may be fixed by interference fit. Of course, the rotating shaft 111 and the input gear 112 may be connected by a key-and-slot fit. The motor 11 and the mounting plate 13 are fixedly connected by welding, and the mounting plate 13 and the housing member 4 are fixedly connected by welding, but the mounting plate 13 may be integrally formed with the motor 11. In this way, the motor 11 is fixed by the mounting plate 13, thereby ensuring smooth operation of the rotating shaft 111.

The gear reduction mechanism 2 is provided in the cavity 40 of the housing member. The gear reduction mechanism 2 is a planetary gear mechanism, and includes a planetary gear 21, a planetary gear carrier 22, and an output gear carrier 26, the planetary gear 21 is mounted on the planetary gear carrier 22, the planetary gear 21 is engaged with the input gear 112, the input gear 112 can drive the planetary gear 21 to rotate circumferentially, and the planetary gear 21 can drive the output gear carrier 26 to rotate circumferentially.

The valve body part 3 includes a valve body 31, a valve spool 32, a first valve seat 33, a second valve seat 33', and a transmission shaft 34. The valve body 31 is formed in a substantially hollow tubular shape by drawing a stainless steel material, and the first valve seat 33 is fixed to one end of the valve body 31 by welding, and the second valve seat 33' is fixed to the other end of the valve body 31 by welding. The first valve seat 33 is welded to the first connecting pipe 36, and the second valve seat 33' is welded to the second connecting pipe 37. One of the first adapter tube 36 and the second adapter tube 37 serves as a flow path inlet, and the other serves as a flow path outlet. The valve element 32 is substantially spherical and is disposed in the interior cavity 30 of the valve body member between the first valve seat 33 and the second valve seat 33'. The valve body 31 includes a body portion 311 and a protruding portion 312 extending outward from a circumferential outer wall of the body portion 311, and the protruding portion 312 has a substantially hollow tubular shape. In this embodiment, the output carrier 26 is rotatably connected to the transmission shaft 34, and the transmission shaft 34 is rotatably connected to the valve element 32. Specifically, the transmission shaft 34 is substantially in the shape of a cylindrical rod, the transmission shaft 34 penetrates through the extension portion 312, one end of the transmission shaft 34 extends into the inner cavity 40 of the housing component and is in keyway connection with the hole portion 262 of the output gear carrier 26, the output gear carrier 26 can drive the transmission shaft 34 to rotate circumferentially, the other end of the transmission shaft 34 extends into the inner cavity 30 of the valve body component and is in keyway connection with the groove 321 of the valve core 32, and the transmission shaft 34 can drive the valve core 32 to rotate circumferentially.

The housing member 4 includes an upper housing 41 and a lower housing 42, and the upper housing 41 and the lower housing 42 are each press-formed from a stainless steel plate material. The lower case 42 has a larger wall thickness than the upper case 41, the upper end of the lower case 42 includes a second stepped portion 421 having an upward facing step, the upper case 41 is seated on the second stepped portion 421, and the upper case 41 and the lower case 42 are fixed by welding. The lower end of the lower housing 42 includes a reduced diameter portion 422, the reduced diameter portion 422 is at least partially located in the extension portion 312 of the valve body 31, and the outer wall of the reduced diameter portion 422 is welded and fixed to the inner wall of the extension portion 312.

In this embodiment, the valve body 31 is fixedly connected to the housing part 4, and the motor 11 is arranged in the interior 40 of the housing part. The beneficial effects are that, can reduce the influence of steam to motor 11, reduce the risk of motor 11 short circuit.

Further, as shown in fig. 2, in the present embodiment, the rotating shaft 111 is fixedly connected to the input gear 112, and a circumferential outer wall of the input gear 112 includes a sun gear 1120. The gear reduction mechanism 2 further comprises a gear ring 25 and a partition plate 24, and the gear ring 25 and the partition plate 24 are fixed in a welding mode. Of course, both may also adopt circumferential limit, as long as the partition plate 24 does not rotate circumferentially relative to the gear ring 25. The spacer 24 includes a central aperture 241 with the lower bearing 116 at least partially disposed in the central aperture 241, with the lower bearing 116 being a clearance fit with the central aperture 241. So set up, can realize the location to motor 11. In the specific assembling process, after the motor 11 is positioned, the mounting plate 13 is welded to the inner wall of the lower shell 42 to realize fixation. The gear ring 25 is substantially cylindrical, the sun gear 1120 is located in the inner cavity 250 of the gear ring 25, the planetary gears 21 are located in the inner cavity 250 of the gear ring 25, and the sun gear 1120 is engaged with the planetary gears 21.

As shown in fig. 2 and 4a, the mounting plate 13 is placed on the partition plate 24, and the mounting plate 13 includes a notch 130 at its outer periphery. The housing member cavity 40 includes an upper cavity 401 above the mounting plate 13, the upper cavity 401 being in communication with the gap 130, and the cavity 250 of the aforementioned gear ring. The stator 113 and the rotor 114 are located in the upper chamber 401. The diaphragm 24 includes a communication flow path 240 that communicates the notch 130 with an inner cavity 250 of the gear ring, and the communication flow path 240 includes a through hole 242 that axially penetrates the diaphragm 24 and a radial through groove 243 that radially extends from the through hole 242 to a circumferential outer wall of the diaphragm 24. Through setting up intercommunication flow path 240 and breach 130, link to each other upper chamber 401 with the inner chamber 250 of gear circle, introduce the fluid in the motorised valve into upper chamber 401, be favorable to the heat dissipation of motor 11, simultaneously, can not make upper chamber 401 form the liquid and seal the chamber, improved the security of motorised valve.

Further, as shown in fig. 4a, the communication flow path 240 further includes an annular groove 244, at least two through holes 242 are provided symmetrically with respect to the center hole 241, and the annular groove 244 communicates with the through holes 242. With this arrangement, the flow capacity of the communication flow path 240 is improved.

The planet carrier 22 includes a first stage planet carrier 221, the first stage planet carrier 221 includes a center through hole 2210, and the lower end of the rotating shaft 111 is located at the center through hole 2210. The gear speed reducing mechanism 2 further comprises a positioning rod 23, the positioning rod 23 is machined and manufactured by a metal bar material lathe, the upper end of the transmission shaft 34 comprises a blind hole 343, the upper end of the positioning rod 23 is located in the central through hole 2210, and the lower end of the positioning rod 23 is located in the blind hole 343. With this arrangement, the carrier 22 can be positioned, the operation stability of the gear reduction mechanism 2 can be improved, and the risk of jamming can be reduced.

Figure 10a is a schematic partial cross-sectional view of a second electrically operated valve provided in accordance with the present invention; fig. 10b is a schematic view of the combination of the rotating shaft, the transmission rod and the input gear in fig. 10 a.

The present embodiment differs from the above-described embodiments in the structure of the control member and the connection relationship between the control member and the gear reduction mechanism.

As shown in fig. 10a and 10b, the motor 11 ' includes a rotating shaft 111 ' and a transmission rod 117 fixedly connected to the rotating shaft 111 ', and the transmission rod 117 has a substantially plate shape and includes a sidewall 1171. The input gear 112' includes a large diameter section 1121 and a small diameter section 1122, a groove 1123 is formed at the upper end of the large diameter section 1121, the transmission rod 117 is at least partially located in the groove 1123, the groove 1123 includes a groove wall portion 1124 capable of abutting against the side wall portion 1171, and a circumferential movement gap is formed between the groove wall portion 1124 and the side wall portion 1171. The outer circumferential wall of the small-diameter section 1122 includes a sun gear 1120 ', the sun gear 1120 ' being at least partially located in the inner cavity 250 of the gear ring, the sun gear 1120 ' being in mesh with the planet gears 21, and the small-diameter section 1122 extending through the central hole 241 of the partition 24.

Further, as shown in fig. 10a, a convex ring 1125 is disposed at the lower end of the large diameter portion 1121, the longitudinal cross-sectional profile of the lower end of the convex ring 1125 is substantially circular arc, and the convex ring 1125 abuts against the partition 24. By arranging the convex ring 1125, the friction force generated when the input gear 112 'rotates in the circumferential direction is reduced, and the service life of the input gear 112' is prolonged.

Further, as shown in fig. 2 and 3, the electrically operated valve further includes a connector 5, and the connector 5 includes a socket 51, a sealing glass 52 and pins 53. The sealing glass 52 is fixed in the socket 51 by sintering, specifically, the socket 51 is made of stainless steel material, and has a substantially hollow structure, and includes an upper section 511, a middle section 512 and a lower section 513, the upper section 511 has a socket cavity 5110, the lower section 513 has a sealing cavity 5130, the sealing cavity 5130 is communicated with the inner cavity 40 of the housing component, and the middle section 512 and the sealing glass 52 are fixed and sealed by sintering to isolate the socket cavity 5110 from the sealing cavity 5130. The pin 53 penetrates through the sealing glass 52, the upper end of the pin 53 extends into the plug cavity 5110 and can be electrically connected with an external connector, the lower end of the pin 53 extends into the sealing cavity 5130 and is electrically connected with the lead 12 of the control component 1, and the pin 53 and the sealing glass 52 are fixed through sintering.

Further, the upper housing 41 includes a protruding portion 411 protruding upward, the lower end of the socket 51 includes a first stepped portion 514 facing downward, and the protruding portion 411 is fixed to the first stepped portion 514 by welding.

As shown in fig. 2, the propeller shaft 34 penetrates the reduced diameter portion 422 of the lower housing 42, and the bearing member 27 is provided between the reduced diameter portion 422 and the propeller shaft 34. The bearing member 27 is made of a wear-resistant metallic material powder metallurgy. The beneficial effect that so set up lies in, reduces the wearing and tearing of transmission shaft 34 in the circumferential direction rotation in-process, improves the life of transmission shaft 34.

Of course, the lower housing 42 and the valve body 31 may be fixed by welding the inner wall of the reduced diameter portion 422 and the outer wall of the protruding portion 312 of the valve body 31. The transmission shaft 34 penetrates the protruding portion 312, and a bearing member 27 is provided between the protruding portion 312 and the transmission shaft 34. This embodiment has the same technical effects as the above-described embodiments.

As shown in fig. 2, 5 and 7, the end of the transmission shaft 34 facing the control member 1 includes a first keyed portion 341 keyed to the hole portion 262 of the output carrier 26, the first keyed portion 341 is located in the inner cavity 40 of the housing member, the cross section of the first keyed portion 341 is non-circular, and the first keyed portion 341 extends into the hole portion 262 of the output carrier 26; the other end of the transmission shaft 34 includes a second key 342 connected with the key groove of the valve core 32, the second key 342 is located in the inner cavity 30 of the valve body part, the lower end of the second key 342 extends into the groove 321 of the valve core 32, and the second key 342 is matched with the key groove of the valve core 32.

As shown in fig. 4b, 5, 6 and 7, in the present embodiment, the lower end of the gear ring 25 is provided with a limit groove 251. The output carrier 26 includes a disk-shaped body portion 261, a hole portion 262 is provided in the disk-shaped body portion 261, the cross section of the hole portion 262 is non-circular, and a protrusion portion 263 is provided on a side of the disk-shaped body portion 261 facing the spool 32. In the present embodiment, the bearing member 27 includes a cylindrical portion 271 and a radially extending portion 272 extending radially outward from a circumferential outer wall of the cylindrical portion 271, the cylindrical portion 271 includes an axial through groove 274, and the axial through groove 274 communicates the inner cavity 40 of the housing member and the inner cavity 30 of the valve body member; the outer end edge of the radial extension portion 272 is welded and fixed with the inner wall of the lower housing 42, one end of the radial extension portion 272 away from the cylindrical portion 271 is in keyway fit with the limiting groove 251, and the other end of the radial extension portion 272 is in fit with the protruding portion 263, so that the circumferential rotation stroke of the output carrier 26 can be limited.

In the above embodiment, since the radial extending portion 272 of the bearing member 27 is fixed to the lower housing 42 by welding, on one hand, the radial extending portion 272 is in keyway fit with the limiting groove 251 of the gear ring 25, so that the gear ring 25 is limited in the circumferential direction, on the other hand, the protruding portion 263 is limited by the radial extending portion 272, so as to limit the circumferential rotation stroke of the output gear carrier 26, that is, the circumferential rotation stroke of the transmission shaft 34 is limited, so that the fully open position and the fully closed position of the valve core 32 can be limited, and the fully open, fully closed and flow rate adjusting functions of the electric valve can be realized.

Fig. 9 is a schematic view of another bearing member.

As shown in fig. 9, the bearing member 27A includes a cylindrical portion 271A, a radially extending portion 272A extending radially outward from a circumferential outer wall of the cylindrical portion 271A, and an axially extending portion 273A extending axially upward from the radially extending portion 272A. The cylindrical portion 271A includes an axial through groove 274A, the axial through groove 274A communicating the inner cavity 40 of the housing member and the inner cavity 30 of the valve body member; the outer wall of the axial extending portion 273A is welded and fixed to the inner wall of the lower housing 42, the axial extending portion 273A is located in the limiting groove 251 and is in key-groove fit with the limiting groove 251, and the radial extending portion 272 and the protruding portion 263 are matched to limit the circumferential rotation stroke of the output gear carrier 26.

Further, as shown in fig. 5, the number of the protruding portions 263 is 2, and the protruding portions are symmetrically arranged with respect to the central axis of the hole portion 262, so that the output gear carrier is advantageous to rotate stably in the circumferential direction and to be limited reliably. Also, the protruding portion 263 is integrally injection-molded with the disk-shaped body portion 261 by plastic or integrally molded by metal powder metallurgy. Therefore, the strength of the output gear carrier is enhanced, and the limiting is more reliable.

Figure 11 is a schematic view in partial cross-section of a third electrically operated valve provided in accordance with the present invention; FIG. 12 is a schematic structural view of the valve body of FIG. 11; fig. 13 is a schematic view of the bearing member of fig. 11.

The present embodiment differs from the above embodiments in the structure of the valve body member, the manner of stopping, and the bearing member.

As shown in fig. 10, 11 and 12, in the present embodiment, the valve body part 3A includes a valve body 31A, a transmission shaft 34, a first valve seat 33A and a valve element 32, a blank of the valve body 31A is forged or cast from a metal material, and the first valve seat 33A is machined, forged or cast from a metal material. The valve body 31A includes a substantially cylindrical body portion 311A and a protruding portion 312A extending from an outer wall of the body portion 311A toward the control member 1, the protruding portion 312A is provided with an axial through hole 3120A, the axial through hole 3120A has a circular cross section, and the transmission shaft 34 penetrates the axial through hole 3120A. In this embodiment, the inner wall of the reduced diameter portion 422 of the lower housing 42 is welded and fixed to the outer wall of the protruding portion 312A, a bearing 27B is disposed between the protruding portion 312A and the transmission shaft 34, the bearing 27B is formed by bending a metal plate, the bearing 27B has a gap 275, and the gap 275 communicates the inner cavity 40 of the housing member and the inner cavity 30 of the valve body member.

In this embodiment, the upper end of the protruding portion 312A includes two limiting bosses 313, the two limiting bosses 313 are symmetrically arranged with respect to the central axis of the axial through hole 3120A, a concave portion 314 is formed between the two limiting bosses 313, the concave portion 314 is located in a circumferential space between the two limiting bosses 313, the protruding portion 263 of the output carrier 26 is placed in the concave portion 314, and the protruding portion 263 can abut against the limiting bosses 313 to limit a circumferential rotation stroke of the output carrier 26. In the embodiment, the limiting boss 313 is integrated in the valve body 31A, so that a bearing piece does not need to be specially processed, and the bearing piece is simple to process.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

An electric valve comprises a shell component, a valve body component, a control component and a gear reduction mechanism,

the shell component is fixedly connected with the valve body component, a valve cavity of the electric valve comprises an inner cavity of the shell component and an inner cavity of the valve body component, and the inner cavity of the shell component is communicated with the inner cavity of the valve body component;

the control component and the gear reduction mechanism are arranged in an inner cavity of the shell component, the control component comprises a motor and an input gear, the motor is rotationally connected with the input gear, a stator and a rotor of the motor are positioned above the gear reduction mechanism, the gear reduction mechanism comprises a planetary gear and an output gear carrier, the input gear is meshed with the planetary gear, and the planetary gear can drive the output gear carrier to rotate;

the valve body component comprises a valve body, a first valve seat, a valve core and a transmission shaft, the valve body is fixedly connected with the first valve seat, the valve core is arranged in an inner cavity of the valve body component, the output gear carrier is rotatably connected with the transmission shaft, and the transmission shaft is rotatably connected with the valve core.
The electrically operated valve of claim 1, wherein one end of said drive shaft extends into a bore of said output gear carrier, said output gear carrier being capable of rotating said drive shaft, the other end of said drive shaft extending into a slot of said valve element, said drive shaft being capable of rotating said valve element.
The electrically operated valve of claim 2, wherein the motor comprises a rotating shaft fixedly connected with the input gear, the circumferential outer wall of the input gear comprises a sun gear, the gear reduction mechanism further comprises a gear ring and a partition plate, the gear ring and the partition plate are fixedly connected, the gear ring is substantially cylindrical, the sun gear is at least partially located in an inner cavity of the gear ring, the planetary gear is located in an inner cavity of the gear ring, the sun gear is engaged with the planetary gear, the partition plate comprises a central hole, the motor comprises a lower bearing close to the input gear, the lower bearing is at least partially located in the central hole, and the lower bearing is in clearance fit with the central hole.
The electrically operated valve according to claim 3, wherein the control member further comprises a mounting plate disposed in the partition plate, the mounting plate including a notch at an outer periphery, the motor being fixedly connected to the mounting plate, the mounting plate being fixedly connected to the housing member, the inner cavity of the housing member including an upper cavity above the mounting plate and an inner cavity of the gear ring, the upper cavity being in communication with the notch, the stator and the rotor being disposed in the upper cavity, the gear ring being disposed in the lower cavity, the partition plate including a communication flow path communicating the notch and the inner cavity of the gear ring, the communication flow path including a through hole axially penetrating the partition plate and a through groove radially extending from the through hole to a circumferential outer wall of the partition plate.
The electrically operated valve according to claim 4, wherein said communication flow path further comprises at least two annular grooves, and said at least two annular grooves are symmetrically disposed with respect to said central hole, and said annular grooves communicate with each of said at least two through holes.
The electrically operated valve according to claim 2, wherein the motor comprises a rotating shaft and a transmission rod fixedly connected with the rotating shaft, the transmission rod comprises a side wall part, the input gear comprises a large diameter section and a small diameter section, the upper end of the large diameter section is provided with a groove, the transmission rod is at least partially positioned in the groove, the groove comprises a groove wall part capable of abutting against the side wall part, a circumferential moving gap is formed between the groove wall part and the side wall part, the circumferential outer wall of the small diameter section comprises a sun gear, the gear reduction mechanism further comprises a gear ring and a partition plate, the gear ring and the partition plate are fixedly connected, the gear ring is substantially cylindrical, the sun gear is at least partially positioned in an inner cavity of the gear ring, the planetary gear is positioned in an inner cavity of the gear ring, and the sun gear is meshed with the planetary gear, the baffle plate comprises a central hole, and the small-diameter section penetrates through the central hole.
The electric valve as claimed in claim 6, wherein the lower end of the large diameter section is provided with a convex ring, the longitudinal section profile of the lower end of the convex ring is approximately circular arc, and the convex ring abuts against the partition plate.
The electric valve according to claim 3, wherein the gear reduction mechanism further comprises a planetary gear carrier and a positioning rod, the planetary gear is disposed on the planetary gear carrier, the planetary gear carrier comprises a first stage planetary gear carrier, the first stage planetary gear carrier comprises a central through hole, the lower end of the rotating shaft is located in the central through hole, the upper end of the transmission shaft comprises a blind hole, the upper end of the positioning rod is located in the central through hole, and the lower end of the positioning rod is located in the blind hole.
The electric valve of claim 2, further comprising a plug-in component, wherein the plug-in component comprises a plug seat, sealing glass and a contact pin, the plug seat is welded and fixed with the housing component, the plug seat comprises an upper section, a middle section and a lower section, the upper section comprises a plug-in cavity, the sealing glass is fixedly arranged in the middle section by sintering, the lower section comprises a sealing cavity, the sealing glass and the contact pin are fixedly arranged by sintering, the contact pin penetrates through the sealing glass, the upper end of the contact pin is positioned in the plug-in cavity, the lower end of the contact pin is positioned in the sealing cavity, and the lower end of the contact pin is electrically connected with a lead of the control component;

the casing part includes casing and lower casing, go up the casing with casing welded fastening down, the upper end of going up the casing includes the protruding portion that makes progress outstanding, the lower extreme of socket includes the first step portion that the step face is down, the protruding portion with first step portion welded fastening, the upper end of casing includes the second step portion that the step face is up down, go up the casing and arrange in second step portion, go up the casing with second step portion welded fastening, down the casing with valve body welded fastening.
An electrically operated valve according to any one of claims 3 to 7 wherein the valve body is generally tubular, the valve body being drawn from a stainless steel material, the valve body including a body portion and an extension portion extending from a peripheral outer edge of the body portion, the extension portion being generally tubular, the drive shaft extending through the extension portion;

the lower casing of casing part includes undergauge portion, the inner wall of extension with the outer wall welded fastening of undergauge portion, undergauge portion with be equipped with bearing spare between the transmission shaft, or, the outer wall of extension with the inner wall welded fastening of undergauge portion, extension with be equipped with bearing spare between the transmission shaft.
The electric valve according to claim 10, wherein the output carrier includes a disk-shaped body portion, a hole portion of the output carrier is provided in the disk-shaped body portion, the hole portion has a non-circular cross section, a protrusion portion is provided on a side of the disk-shaped body portion facing the valve element, the bearing member includes a cylindrical portion, and a radially extending portion radially extending from the cylindrical portion, the cylindrical portion includes an axial through groove, the axial through groove communicates an inner cavity of the housing member and an inner cavity of the valve body member, an outer edge of the radially extending portion is welded and fixed to an inner wall of the lower housing, one end of the radially extending portion, which is away from the cylindrical portion, is located in a stopper groove at a lower end of the gear ring, and the protrusion portion can abut against the other end of the radially extending portion to restrict a circumferential rotational stroke of the output carrier.
The electrically operated valve of claim 10, wherein said output carrier includes a disk-shaped body portion, a hole portion of the output carrier is provided in the disc-shaped body portion, the hole portion having a non-circular cross section, a protrusion is provided on a side of the disc-shaped body portion facing the valve element, the bearing member includes a cylindrical portion, a radially extending portion radially extending from the cylindrical portion, and an axially extending portion axially extending upward from the radially extending portion, the cylindrical portion includes an axial through groove communicating the inner cavity of the housing member and the inner cavity of the valve body member, the projection portion is capable of abutting against the radially extending portion to limit a circumferential rotational stroke of the output carrier, the outer wall of the axial extension part is welded and fixed with the inner wall of the lower shell, and the axial extension part is located in a limiting groove at the lower end of the gear ring.
An electrically operated valve according to any one of claims 1 to 9, wherein the blank of the valve body is forged or cast from a metal material, the valve body comprises a body portion and a projecting portion projecting toward the control member, the projecting portion comprises a through hole through which the transmission shaft extends;

the lower casing of casing part includes undergauge portion, the outer wall of extension with the inner wall welded fastening of undergauge portion, extension with be equipped with bearing spare between the transmission shaft, bearing spare includes the breach that the axial link up, the breach intercommunication the inner chamber of casing part with the inner chamber of valve body part.
The electric valve according to claim 13, wherein the output carrier includes a disk-shaped body portion, a hole portion of the output carrier is provided in the disk-shaped body portion, the hole portion has a non-circular cross section, a protrusion portion is provided on a side of the disk-shaped body portion facing the valve body, an upper end of the protrusion portion includes a boss, and the protrusion portion is capable of abutting against the boss to limit a circumferential rotational stroke of the output carrier.