WO2022161426A1

WO2022161426A1 - Electric valve

Info

Publication number: WO2022161426A1
Application number: PCT/CN2022/074229
Authority: WO
Inventors: 魏先让
Original assignee: 浙江三花智能控制股份有限公司
Priority date: 2021-02-01
Filing date: 2022-01-27
Publication date: 2022-08-04
Also published as: CN114838180A

Abstract

An electric valve, comprising a valve body. The valve body comprises a valve seat part and a valve core rotor assembly. The valve core rotor assembly comprises a valve shaft assembly, a valve core, a first/second elastic member, and an ejector rod. The valve shaft assembly comprises a valve shaft abutting portion. The valve core passes through the vale shaft assembly and comprises a valve core abutting portion, and the valve core abutting portion can abut against the valve shaft abutting portion. The ejector rod comprises an ejector rod body portion and an ejector rod abutting portion, the ejector rod abutting portion is supported on a second elastic member, and the second elastic member is supported on the valve core. The first elastic member is externally sleeved on the second elastic member. The valve core rotor assembly comprises a first abutting portion. The first elastic member abuts against the first abutting portion and the valve core. The valve shaft assembly comprises a channel portion, and the ejector rod body portion protrudes from the channel portion. The valve body comprises a limiting portion. The valve seat part comprises an internal thread portion, the valve shaft assembly comprises an external thread portion, and when the internal thread portion and the external thread portion are not threadedly jointed, the elastic force of the second elastic member on the valve shaft assembly can enables the internal thread portion and the external thread portion to be threadedly jointed again.

Description

an electric valve

This application claims the priority of the Chinese patent application with the application number of 202110135767.5 and the invention name of "an electric valve" filed with the China Patent Office on February 1, 2021, the entire contents of which are incorporated into this application by reference.

【Technical field】

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

【Background technique】

14, CN109723884A discloses an electric valve, the electric valve has a guide bush 20 and a valve shaft holder 30, the guide bush 20 is provided with an external thread portion 23, and the valve shaft holder 30 is provided with an internal thread portion 33. The external thread portion 23 and the internal thread portion 33 constitute the screw feeding mechanism 28 of the electric valve.

The electric valve further includes a fixing member 70 , and a restoring spring 75 is sleeved on the outer periphery of the fixing member. When the valve shaft holder 30 moves upward relative to the guide bushing 20 , the threaded portion 23 of the guide bushing 20 and the valve shaft holder 30 are caused to move upwardly. When the threaded portion 33 of the threaded portion 33 is turned into a non-threaded state, the return spring 75 is in a compressed state, and the valve shaft holder is subjected to the downward spring force of the return spring 75. When the rotor part rotates in the reverse direction, the return spring 75 The elastic force can make the movable threaded portion 33 and the fixed threaded portion 23 re-screw.

[Content of the invention]

The object of the present invention is to provide an electric valve, including a valve body and a coil, the coil is sleeved on the valve body, the valve body includes a valve seat part and a valve core rotor assembly, and the valve core rotor assembly includes a valve a shaft assembly, a valve core, a first elastic member, a second elastic member, and an ejector rod;

the valve shaft assembly includes a valve shaft abutment;

The valve core is passed through the valve shaft assembly, the valve core includes a valve core abutting portion, and the valve core abutting portion can abut against the valve shaft abutting portion;

the ejector rod comprises a ejector rod body part and a ejector rod abutting part, the ejector rod abutting part is supported on the upper end of the second elastic piece, and the second elastic piece is supported on the valve core;

The first elastic member is sleeved on the second elastic member, the valve core rotor assembly further includes a first abutting portion, the upper end of the first elastic member abuts against the first abutting portion, the The lower end of the first elastic member abuts against the valve core; the valve shaft assembly further includes a channel part through which the push rod body part passes;

The valve body further includes a restricting portion, the valve seat member includes an inner thread portion, and the valve shaft assembly includes an outer thread portion. When the inner thread portion and the outer thread portion are in a non-threaded state, the top The rod body part abuts against the restricting part, the upper end part of the second elastic piece abuts against the push rod abutting part, the lower end part of the second elastic piece abuts against the valve core, the valve core abuts The abutting portion abuts against the valve shaft abutting portion.

In the electric valve provided by the present application, when the internal thread part and the external thread part are in a non-threaded state, the main body part of the ejector rod abuts against the restricting part, the upper end of the second elastic member abuts against the abutting part of the ejector rod, and the second elastic member The upper end of the second elastic piece is in contact with the valve core, the lower end of the second elastic member is in contact with the valve core abutting part, and the valve core abutting part is in contact with the valve shaft abutting part. When the valve core rotor assembly rotates in the valve closing direction, the second The elastic force of the elastic member can be applied to the valve shaft assembly, so that the inner thread part of the valve seat part and the outer thread part of the valve shaft assembly can be re-threaded.

【Description of drawings】

1 is a sectional view of the electric valve of the present invention in a fully closed state;

Fig. 2 is the structural representation of the electric valve seat part of the present invention;

Figure 3a is a schematic structural diagram of the electric valve spool rotor assembly of the present invention;

Fig. 3b is a partial enlarged cross-sectional view of position A of Fig. 3a;

4 is a sectional view of the valve body when the spool rotor assembly of the electric valve of the present invention is about to over-open the critical point;

5 is a sectional view of the valve body when the electric valve spool rotor assembly of the present invention is over-opened when the screw pair is disengaged;

6 is a schematic structural diagram of a valve core rotor assembly according to a second embodiment of the present invention;

7 is a schematic structural diagram of a valve core rotor assembly according to a third embodiment of the present invention;

8 is a schematic structural diagram of a spool rotor assembly according to a fourth embodiment of the present invention;

9 is a schematic structural diagram of a spool rotor assembly according to a fifth embodiment of the present invention;

10 is a schematic structural diagram of a spool rotor assembly according to a sixth embodiment of the present invention;

11 is a schematic structural diagram of a valve core rotor assembly according to a seventh embodiment of the present invention;

12 is a schematic structural diagram of a valve core rotor assembly according to an eighth embodiment of the present invention;

13 is a schematic structural diagram of a valve core rotor assembly according to a ninth embodiment of the present invention;

14 is a cross-sectional view of an electric valve in the background art;

Among them, Figures 1-13 include the following reference numerals:

10 valve seat part; 101 valve seat; 102 nut; 103 first pipe part; 104 second pipe part; 10a valve port part; 10b internal thread part; 10c fixed stop part; 10d first access channel; 10e second access 20 valve core rotor assembly; 201 valve shaft assembly; 2011 valve shaft; 2012 bushing; 20121 bushing hole part; 20122 extension part; 2013 valve shaft body part; Valve shaft inner wall; 20151 first valve shaft inner wall; 20152 valve shaft abutting part; 20153 second valve shaft inner wall; 2016 outer edge; 20161 first outer edge; 20162 second outer edge; 207 gasket ; 201a external thread part; 201b movable stop part; 201c rotor fixing part; 202 valve core; 2021 valve core body part; 2022 valve core sleeve; 20221 valve core sleeve hole part; 203 rotor; 204 second elastic part; 205 ejector; 2051 ejector main body; 2052 ejector abutting part; 206 washer; 201b movable stop part; 20a first abutting part; 20b second abutting part; 20c channel part; 20d restricting part; 30 housing; 40 coil.

【Detailed ways】

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIG. 1 to FIG. 5, wherein, FIG. 1 is a sectional view of the electric valve of the present invention in a fully closed state; FIG. 2 is a schematic structural diagram of the electric valve seat part of the present invention; FIG. 3a is the electric valve valve core rotor assembly of the present invention. Schematic diagram of the structure; Fig. 3b is a partial enlarged cross-sectional view of the position A of Fig. 3a; Fig. 4 is a cross-sectional view of the valve body when the spool rotor assembly of the electric valve of the present invention is about to over-open the critical point; Fig. 5 is the electric valve spool rotor of the present invention The cross-sectional view of the valve body when the assembly is over-opened and the thread pair is disengaged;

Please refer specifically to FIG. 1. FIG. 1 is a cross-sectional view of the first embodiment of the electric valve provided by the present invention in a fully closed state. In a specific embodiment, the electric valve provided by the present invention includes a valve body and a stator coil 40. The coil 40 Set on the valve body. The valve body includes a valve core rotor assembly 20 , a valve seat member 10 and a housing 30 . The stator coil 40 of the electric valve is connected to the drive controller. After the drive controller is energized, it sends a pulse drive signal to the stator coil 40, and the stator coil 40 generates a periodically changing magnetic field, thereby driving the spool rotor assembly 20 of the electric valve to perform forward or Reverse rotation. The valve core rotor assembly 20 includes a valve shaft assembly 201. In this embodiment, the valve shaft assembly 201 includes a valve shaft 2011. The valve shaft 2011 is provided with an external thread portion 201a, and the valve seat member 10 includes a nut 102. The inner hole of the nut 102 There is an inner thread portion 10b, the valve shaft 2011 is threadedly matched with the nut 31, while the valve core rotor assembly 20 rotates, the valve shaft 2011 will move along the axial direction, thereby driving the valve core 202 to realize the opening of the valve port portion 10a. close action.

Fig. 1 is a sectional view of the electric valve of the present invention in a fully closed state. 2 and 3 , the electric valve of the present invention includes a valve body and a coil 40 , and the valve body includes a valve seat member 10 (shown in FIG. 2 ), a valve core rotor assembly 20 (shown in FIG.

The valve seat member 10 has a valve port portion 10a, a first inlet and outlet passage 10d and a second inlet and outlet passage 10e, and the valve port portion 10a can communicate with the first inlet and outlet passages 10d and the second inlet and outlet passages 10e, so as to allow a fluid medium (eg, refrigerant) In addition, the valve seat member 10 is provided with a through hole penetrating up and down substantially at the center position, and a female screw portion 10b is provided in the through hole. In this embodiment, the valve seat member 10 includes a nut 102, and the nut 102 includes the The through hole of the nut 102 is also provided with an internal thread portion 10b, the valve seat member 10 further includes a valve seat 101, the part of the nut 102 is located in the valve seat 101, and the nut 102 is fixedly connected with the valve seat 101 (for example, The connecting body is integrally injection-molded with the nut 102 as an insert, and then the connecting body and the valve seat 101 are fixedly connected by welding or press-fitting, or the nut 102 and the valve seat 101 are press-fitted and fixed. In this embodiment, , the nut 102 and the valve seat 101 are fixedly connected by welding and fixing the connecting body and the valve seat 101), of course, the nut 102 and the valve seat 101 can also be integrally processed and formed, and the valve seat 101 is integrally formed with The valve port portion 10a, of course, the valve port portion 10a can also be formed in other components, and then the component is fixedly connected to the valve seat 10a. In addition, in the present embodiment, the valve seat 101 is fixedly connected with the first connecting pipe part 103 and the second connecting pipe part 104, and the first connecting pipe part 103 and the second connecting pipe part 104 are used as the inflow or outflow channel of the fluid medium of the electric valve, and generally use When it is installed in refrigeration and heating systems such as air conditioners, it is connected to the system pipeline.

In this embodiment, the first connecting pipe portion 103 and the second connecting pipe portion 104 are connected to the valve seat 101 by welding. Of course, the first connecting pipe portion 103 and the second connecting pipe portion 104 may not be provided, but a refrigerant fluid may be used. The passing flow path is directly arranged on the valve seat 101, or the first connecting pipe portion 103 or the second connecting pipe portion 104 can also be connected by flange sealing. For quick repairs. In this embodiment, an example is given by providing the first connecting portion 103 and the second connecting portion 104 .

The valve core rotor assembly 20 includes a rotor 203 and a valve core 202. The rotor 203 has magnetic poles in the circumferential direction. The outer edge section of the valve shaft 2011 is provided with an external thread portion 201a at a substantially lower position. The valve core 202 is inserted in the center of the valve shaft 2011. Through holes, in addition, the valve core rotor assembly 20 also includes a first elastic member 208 and a second elastic member 204 disposed in the center of the valve shaft 2011, and a recoverable top rod 205 disposed at the upper end of the second elastic member 204. In the embodiment, the first elastic member 208 and the second elastic member 204 are in the form of springs, and the valve shaft assembly 201 further includes a bushing 2012 that is fixedly connected to a substantially upper end of the valve shaft 2011 .

In addition, the electric valve provided in this embodiment further includes a casing 30 with one end open. The casing 30 is a thin-walled member and is in the shape of a shell. The open side of the lower end of the casing 30 is hermetically welded with the valve seat member 10 to form an accommodating chamber. , the upper half of the nut 102 and the main body of the spool rotor assembly 20 can be accommodated.

In the valve seat member 10, a substantially center position of the nut 102 is provided as a vertically penetrating hole, and a female thread portion 10b (also referred to as a fixed thread portion) is provided in a substantially middle and lower portion of the through hole, and the female thread portion 10b is connected to the valve. The male screw portion 201a (also referred to as a movable screw portion) provided at a substantially lower position of the shaft 2011 in combination constitutes the screw feeding mechanism of the electric valve, that is, a screw pair. The nut 102 protrudes from the annular base body and is provided with a fixed stop portion 10c, which cooperates with the movable stop portion 201b provided on the valve core rotor assembly 20 to constitute the stop mechanism at the lower end of the stroke of the electric valve, that is, when the valve core When the rotor assembly 20 moves downward relative to the valve seat member 10 to a certain extent, the movable stop portion 201b can abut against the fixed stop portion 10c to limit the rotation of the valve core rotor assembly 20 relative to the valve seat member 10, thereby The limit spool rotor assembly 20 continues to act downward in the axial direction. When the spool rotor assembly 20 rotates down to the lowermost end of its stroke, the movable stop portion 201b abuts against the corresponding mating surface of the fixed stop portion 10c, so that the downward movement of the spool rotor assembly 20 can be controlled.

The coil 40 of the electric valve receives the driving pulse signal to generate a changing magnetic field, and the rotor 203 in the valve body is excited to rotate. In this embodiment, the valve shaft 2011 is fixedly connected to the rotor 203, so the valve shaft 2011 will follow the rotor 203 to rotate synchronously. The screw feeding mechanism of the valve shaft 2011 and the nut 102 can convert the rotary motion of the rotor 203 into axial movement, thereby driving the valve core 202 to make the valve core head 202a close to or away from the valve port 10a, thereby realizing the flow rate of the electric valve. Linear switch adjustment function.

FIG. 3 is a schematic structural diagram of the electric valve spool rotor assembly of the present invention, and a partial enlarged cross-sectional view thereof. The valve core rotor assembly 20 of the electric valve includes a rotor 203 with magnetic poles in the circumferential direction, a valve shaft 2011 fixedly connected to the rotor 203, a valve core 202 passing through the central through hole of the valve shaft 2011, and a The first elastic member 208 and the second elastic member 204 in the inner wall portion 20151 of the first valve shaft (which will be mentioned below) in the center of the valve shaft 2011, and the return ejector rod 205 disposed on the upper end of the second elastic member 204, and the A bushing 2012 is fixedly connected to the upper end of the valve shaft 2011 .

The electric valve of the present invention sets the second elastic member 204 in the inner hole cavity of the valve shaft 2011 to constrain the circumferential direction and the up-down direction. Compared with the electric valve of the background art, the second elastic member 204 moves The gap between the two parts is smaller, so the noise generated by the play can be reduced, and the failure risk of the second elastic member 204 falling off and displacement can also be reduced or avoided.

In this embodiment, the valve shaft 2011 includes a vertical through hole, and the inner wall of the through hole substantially forms the valve shaft inner wall portion 2015. In the axial direction of the valve shaft 2011, the inner diameter of the valve shaft inner wall portion 2015 is not the same. The valve shaft inner wall portion 2015 includes a first valve shaft inner wall portion 20151, a valve shaft abutting portion 20152 and a second valve shaft inner wall portion 20153. The first valve shaft inner wall portion 20151 is located above the second valve shaft inner wall portion 20153, and On the plane where the cross section of the valve shaft 2011 is located, the orthographic projection of the first valve shaft inner wall portion 20151 along the plane (the orthographic projection is a closed loop or toroid) is located on the orthographic projection of the second valve shaft inner wall portion 20153 along this plane (the orthographic projection is a closed ring line or a ring surface), usually for the convenience of processing and manufacturing, the cross-sections of the inner wall portion 20151 of the first valve shaft and the inner wall portion 20153 of the second valve shaft are both set to be circular. At this time, the first valve shaft The inner diameter of the inner wall portion 20151 is larger than the inner diameter of the second valve shaft inner wall portion 20153. In this embodiment, the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 have equal diameters in the height direction, so the first valve The orthographic projection of the shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 along the plane where the cross section of the valve shaft 2011 is located is also a circular ring line.

In addition, the valve shaft abutting portion 20152 has an extension distance in the horizontal direction, the outer edge of the valve shaft abutting portion 20152 intersects with the first valve shaft inner wall portion 20151, and the inner edge of the valve shaft abutting portion 20152 and the second valve shaft inner wall portion 20153 intersect, when the cross-sections of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 are both set to be circular, the orthographic projection of the valve shaft abutting portion 20152 along the plane where the cross-section of the valve shaft 2011 is located is a circular ring. In this embodiment, the valve shaft abutting portion 20152 is arranged in a horizontal direction. Of course, the valve shaft abutting portion 20152 can also be arranged in a form that is not completely flat, for example, away from the center of the valve shaft abutting portion 20152 The valve shaft abutting portion 20152 extends upward or downward gradually. It can be understood that the valve shaft abutting portion 20152 only needs to satisfy that the valve shaft abutting portion 20152 has an extension distance in the horizontal direction.

Of course, the structure of the first valve shaft inner wall portion 20151, the valve shaft abutting portion 20152, and the second valve shaft inner wall portion 20153 has been described above, but the first valve shaft inner wall portion 20151, the valve shaft abutting portion of the present invention The part 20152 and the second valve shaft inner wall part 20153 are not limited to the above-mentioned structures, it only needs to satisfy that there is a valve shaft abutment with an extended distance in the horizontal direction between the first valve shaft inner wall part 20151 and the second valve shaft inner wall part 20153. The connecting portion 20152 is sufficient, and the valve shaft abutting portion 20152 can abut the valve shaft assembly 201 .

In addition, in this embodiment, the valve shaft 2011 includes an outer edge portion 2016. Specifically, the outer edge portion 2016 includes a first outer edge portion 20161 and a second outer edge portion 20162, and the first outer edge portion 20161 is located at the second outer edge. Above the portion 20162, on the plane where the cross section of the valve shaft 2011 is located, the orthographic projection of the first outer edge portion 20161 along the plane is located at the outer circumference of the orthographic projection of the second outer edge portion 20162 along the plane. The cross-sections of the first outer edge portion 20161 and the second outer edge portion 20162 are both set to be circular, and the portion of the valve shaft 2011 where the first outer edge portion 20161 is located is provided with a rotor fixing portion 201c, and the rotor 203 and the valve shaft fixing portion 201b can be directly Or indirectly welded, riveted, connected by injection molding of magnetic plastic material, bonded with glue, etc. In this embodiment, the connecting piece is used as an insert to connect with the magnetic plastic material by injection molding, and then the valve shaft 2011 and the connecting piece are welded together. When the rotor 203 and the valve shaft 2011 are directly connected, the valve shaft 2011 can also be used as an insert to connect with the magnetic plastic material by injection molding.

The position of the valve shaft 2011 where the second outer edge portion 20162 is located is provided with a male thread portion 201 a, which is also called a movable thread portion, and the male thread portion 201 a and the female thread portion provided in the inner hole of the nut 102 10b (also referred to as a fixed screw portion) in combination constitutes the screw feed mechanism of the electric valve, that is, constitutes a screw pair.

In this embodiment, the valve shaft assembly 201 further includes a bushing 2012, at least a part of the bushing 2012 is located in the inner wall portion 20151 of the first valve shaft, and the bushing 2012 and the valve shaft 2011 are fixedly connected by means of press fitting or welding, etc. The bushing 2012 further includes a bushing hole portion 20121 , and the bushing hole portion 20121 penetrates the upper and lower surfaces of the bushing 2012 .

In this embodiment, the valve core 202 passes through the inner wall portion 2015 of the valve shaft, and a part of the valve core 202 is located on the inner wall portion 2015 of the valve shaft. The spool head 202a is located at the approximate lower end of the spool 202, and the shape of the tip of the spool head 202a is related to the flow regulation curve required by the electric valve. The spool 202 further includes a spool abutting portion 202b, which It is located at a position approximately close to the upper end or the upper end of the valve core 202. In the plane where the cross section of the valve core 202 is located, the orthographic projection of the valve core head 202a along the plane is located in the orthographic projection of the valve core abutting portion 202b along the plane. In the embodiment, the cross sections of the valve core head 202a and the valve core abutting part 202b are both circular, so the diameter of the valve core abutting part 202b is larger than the diameter of the valve core head 202a. In this embodiment, the valve core 202 is inserted into the valve shaft inner wall portion 2015 of the valve shaft 2011 from top to bottom, and the valve core abutting portion 202b can abut against the valve shaft abutting portion 20152, and its valve The core head portion 202a protrudes from the inner wall portion 20153 of the second valve shaft. On the plane where the cross section of the valve core 202 is located, the orthographic projection of the valve core abutting portion 202b along the plane and the orthographic projection of the valve shaft abutting portion 20152 along the plane have an overlapping area. Therefore, the valve core contact portion 202b can It abuts against the valve shaft abutting portion 20152. Of course, when parts such as a gasket 206 are provided between the valve shaft abutting portion 20152 and the valve core abutting portion 202b so that they do not directly abut but indirectly abut, the valve core abutting portion The projection relationship between 202b and the valve shaft abutting portion 20152 may not satisfy the above relationship.

In this embodiment, the outer edge of the valve core abutting portion 202b and the inner edge of the first valve shaft inner wall portion 20151 are both circular, and the outer diameter of the valve core abutting portion 202b is slightly smaller than the valve shaft first valve shaft inner wall portion The inner diameter of 20151, the outer diameter of the valve core abutting part 202b are larger than the inner diameter of the second valve shaft inner wall part 20153, the outer diameter of the largest part of the valve core head 202a is slightly smaller than the inner diameter of the second valve shaft inner wall part 20153, at this time the valve core 202 can be supported on the valve shaft abutting portion 20152 of the valve shaft 2011 .

In addition, the spool rotor assembly 20 of the electric valve of this embodiment further includes a first elastic member 208 and a second elastic member 204. The first elastic member 208 and the second elastic member 204 can be designed as cylindrical coil springs, and the first elastic member 208 and the second elastic member 204 are located in the inner wall portion 20151 of the first valve shaft, the cylindrical outer diameter of the first elastic member 208 is smaller than the inner diameter of the inner wall portion 20151 of the first valve shaft, and the inner diameter of the first elastic member 208 is larger than that of the second elastic member The cylindrical outer diameter of the piece 204. The second elastic member 204 is placed in the cylindrical inner diameter hole of the first elastic member 208 , that is, the second elastic member 204 is nested in the inner diameter hole of the first elastic member 208 , and the first elastic member 208 is sheathed on the second elastic member 204. Because the second elastic member 204 can be nested in the inner diameter hole of the first elastic member 208, the electric valve of the present invention can effectively reduce the height dimension of the electric valve compared with the background art, which is beneficial to save the electric valve in related equipment. installation space in .

The valve core rotor assembly 20 of the electric valve provided by the present invention further includes a push rod 205. The push rod 205 includes a push rod main body portion 2051 and a push rod abutting portion 2052. In this embodiment, the push rod abutting portion 2052 is substantially a top rod. A structure formed by the circumferential extension of the rod main body portion 2051 .

The push rod abutting portion 2052 is located below the bushing 2012 , and the push rod main body portion 2051 protrudes from the bushing hole portion 20121 .

The lower end of the first elastic member 208 abuts against the valve core 202 , and the upper end of the first elastic member 208 abuts against the bushing 2012 . The lower end of the second elastic member 204 abuts against the valve core 202 , and the upper end of the second elastic member 204 abuts against the top rod abutting portion 2052 of the top rod 205 .

The ejector rod abutting portion 2052 may be located at the inner edge of the first elastic member 208. When the ejector rod 205 moves downward against the elastic force of the second elastic member 204, the ejector rod abutting portion 2052 does not abut against the first elastic member 208. , that is, the elastic load of the first elastic member 208 does not act on the ejector rod 205 .

On the plane where the cross section of the spool rotor assembly 20 is located, there is an overlapping area between the orthographic projection of the bushing hole portion 20121 along the plane and the orthographic projection of the push rod abutting portion 2052 along the plane. The orthographic projection is located in the orthographic projection of the bushing hole portion 20121 along the plane, so the ejector pin 205 cannot be disengaged from the bushing hole portion 20121 from bottom to top and the ejector pin main body portion 2051 can pass through the bushing hole portion 20121. Of course, when When components such as a washer 206 are provided between the bushing 2012 and the ejector pin abutting portion 2052 to prevent them from directly abutting, the projection relationship between the bushing hole portion 20121 and the ejector pin abutting portion 2052 may not satisfy the above relationship. In this embodiment, the outer edge of the push rod abutting portion 2052 and the cross-section of the bushing hole portion 20121 are both circular. The diameter of the rod main body portion 2051 is smaller than the inner diameter of the hole portion of the bushing 2012 . The upper end of the main body portion 2051 of the ejector rod passes upward from the bushing hole portion 20121. The ejector pin abutting portion 2052 is pressed by the upward spring of the second elastic member 204, and the ejector pin abutting portion 2052 abuts against the bushing 2012. Here The abutting includes direct abutting or indirect abutting. For example, when a washer 206 and other components are provided between the bushing 2012 and the push rod abutting portion 2052, the rod abutting portion 2052 and the bushing 2012 are indirectly abutting. After the bushing 2012 is fixedly connected to the valve shaft 2011, the first elastic member 208 is in a compressed state, and the second elastic member 204 is in a compressed state or is about to be compressed, for example, when the valve port 10a is in a fully closed state At this time, the top rod 205 is supported on the upper end of the second elastic member 204, but the top rod abutting portion 2052 does not abut against the bushing 2012 at this time, that is, the bushing 2012 and the top rod abutting portion 2052 are electrically There is a distance in the height direction of the valve. When the valve shaft assembly 201 moves upward relative to the valve seat member 10 for a certain distance, the main body portion 2051 of the ejector rod can contact the housing 30. At this time, it is the critical point where the second elastic member 204 is compressed. The shaft assembly 201 continues to move upward relative to the valve seat member 10 for a certain distance, and the second elastic member 204 is compressed. In this embodiment, the second elastic member 204 is always in a compressed state as an example, that is, when the valve port 10a is in a fully closed state, the ejector rod 205 is supported on the upper end of the second elastic member 204, and the ejector rod abuts against the upper end of the second elastic member 204. The lower end of the leaning portion 2052 abuts against the second elastic member 204 , and the upper end of the push rod abutting portion 2052 abuts against the bushing 2012 , and the bushing 2012 is elastically loaded by the second elastic member 204 .

The valve core rotor assembly 20 provided in the present application includes a second abutting portion 20b, and the second abutting portion 20b can abut against the push rod abutting portion 2052, and the valve core rotor assembly 20 provided in this embodiment further includes a first abutting portion 20a, the first abutting portion 20a abuts against the first elastic member 208. In this embodiment, the bushing 2012 abuts against the top rod abutting portion 2052 and the first elastic member 208. Therefore, the bushing 2012 includes a first abutting member. part 20a and the second abutting part 20b.

In addition, the valve shaft assembly 201 provided in the present application further includes a channel portion 20c, and the electric valve provided in this embodiment further includes a restricting portion 20d, and the channel portion 20c can allow the push rod main body portion 2051 of the push rod 205 to pass through to the valve shaft assembly 201 so that the main body portion 2051 of the ejector pin can abut against the restricting portion 20d. In this embodiment, the main body portion 2051 of the ejector pin can pass through the bushing hole portion 20121 to abut against the housing 30. Therefore, in this embodiment, the bushing The sleeve portion 20121 includes a channel portion 20c, and the housing 30 includes a restricting portion 20d.

Fig. 4 is a sectional view of the valve body when the rotor 203 part of the electric valve of the present invention is about to over-open the critical point. The valve core rotor assembly 20 in Fig. 4 is in a state about to be over-opened. Over-opening refers to the state when the valve core rotor assembly 20 is opened upward to exceed its prescribed upper limit stroke. The spool rotor assembly 20 in FIG. 1 is in the fully closed position, and its spool head 202a is in the position closest to the valve port 10a. The valve core head 202a in FIG. 4 is already at a position away from the valve port 10a. At this time, the external thread part 201a of the valve shaft 2011 still has a length (in the figure, the length is L), which is still connected to the internal thread part of the nut 102. 10b is in a screwed state, at this time, the main body portion 2051 of the ejector pin just contacts the restriction portion 20d formed on the top of the inner wall of the housing 30 .

Fig. 5 is a sectional view of the valve body when the electric valve spool rotor assembly of the present invention is over-opened. When over-opened, the outer thread portion 201a and the inner thread portion 10b are disengaged. The valve core rotor assembly 20 in FIG. 5 continues to move upward relative to the position shown in FIG. 4 with a stroke height of L. At this time, the movable thread 201a of the valve shaft 2011 and the fixed thread portion 10b of the nut 102 are just disengaged and screwed together. The second elastic member 204 is further compressed by an amount of L relative to the state in FIG. 4 , and the second abutting portion 20b on the bottom surface of the bushing 2012 and the push rod abutting portion 2052 change from the abutting state to the non-abutting state. In the leaning state, and the top end of the main body portion 2051 of the ejector rod 205 is pressed against the restriction portion 20d of the inner wall of the housing 30, the downward elastic force of the second elastic member 204 is finally transmitted to the valve shaft assembly 201, that is, the valve shaft assembly. 201 is pressed downward by the second elastic member 204 . If the spool rotor assembly 20 continues to rotate in the over-opening direction, the spool rotor assembly 20 will no longer continue to rise relative to the nut 102 because the threaded pair has been disengaged; When the driving force of the valve rotates downward in the valve closing direction, because the valve shaft 2011 is subjected to the downward spring pressing force of the second elastic member 204, the external thread 201a and the internal thread part 10b will be re-reset and screwed together, and the valve core will be re-engaged. The rotor assembly 20 rotates and moves downward.

FIG. 6 is a schematic structural diagram of the valve core rotor assembly according to the second embodiment of the present invention. Compared with the valve core rotor assembly 20 of the first embodiment shown in FIG. 3 , this embodiment is equivalent to a split design of the valve core 202 in the first embodiment. The valve core 202 in this embodiment includes a valve core body portion 2021 and a valve core sleeve 2022. The valve core sleeve 2022 includes a valve core sleeve hole portion 20221, and the valve core sleeve hole portion 20221 penetrates the upper and lower surfaces of the valve core sleeve 2022. The valve core body portion The upper end of the valve core sleeve 2021 passes through the valve core sleeve hole portion 20221, and the valve core body portion 2021 and the valve core sleeve 2022 can be fixedly connected by means of press fitting, welding or bonding. With the solution of this embodiment, the diameter of the head portion 202a of the valve core 202 can be set to be larger than the inner diameter of the inner wall portion 20153 of the second valve shaft. When the diameter of the valve core head 202a is larger than the inner diameter of the inner wall portion 20153 of the second valve shaft, the valve core 202 can be inserted into the central through hole of the valve shaft 2011 from bottom to top, and then the valve core sleeve 2022 can be inserted from the top to the top. The valve core sleeve 2022 can be abutted against the valve shaft abutting portion 20152, and the valve core sleeve 2022 includes the valve core abutting portion 202b, the lower ends of the first elastic member 208 and the second elastic member 204. The parts abut against the upper part of the valve core sleeve 2022 . The structural scheme of other parts of this embodiment is the same as or similar to that of the first embodiment.

In addition, in this embodiment, the main body portion 2021 of the valve core passes through the hole portion 20221 of the valve core and is located in the second elastic member 204. When the lower end of the second elastic member 204 is about to be radially displaced, the valve core is removed The portion of the valve core body portion 2021 through which the sleeve hole portion 20221 penetrates can limit the radial deviation of the second elastic member 204, and the second elastic member 204 is more stable when the electric valve is working.

Of course, the valve core sleeve hole portion 20221 can also be in the form of a blind hole, that is, the valve core body portion 2021 is fixedly connected to the valve core sleeve 2022, but the valve core body portion 2021 does not penetrate above the valve core sleeve hole portion 20221, that is, The hole portion of the valve core sleeve 2022 is not limited to be in the form of a through hole, or the valve core sleeve hole portion 20221 is in the form of a through hole, but the valve core body portion 2021 does not protrude from above the valve core sleeve hole portion 20221 .

FIG. 7 is a schematic structural diagram of the valve core rotor assembly according to the third embodiment of the present invention. Compared with the second embodiment in FIG. 6 , the main difference between this embodiment is that a gasket 206 is added between the upper end of the valve core sleeve 26 and the lower ends of the first elastic member 208 and the second elastic member 204 . The gasket 206 includes a gasket hole portion 2061 , and the gasket hole portion 2061 penetrates the upper and lower surfaces of the gasket 206 . The addition of the washer 206 can reduce the frictional resistance of the valve core 202 to the relative rotational movement between the first elastic member 208 and the second elastic member 204 , thereby improving the operation reliability and operation life of the electric valve. In this embodiment, the lower end surfaces of the first elastic member 208 and the second elastic member 204 abut against the upper end surface of the washer 206 , and the structural solutions of other parts of this embodiment are the same as or similar to those of the second embodiment.

In this embodiment, it is emphasized that the term “to offset” in this application includes both direct offset of two components, and offset between the two components through other components, that is, indirect offset.

FIG. 8 is a schematic structural diagram of the valve core rotor assembly according to the fourth embodiment of the present invention. Compared with the third embodiment in FIG. 7 , the main difference between this embodiment is that the lower end portion of the second elastic member 204 abuts against the main body portion 2021 of the valve core. This structural solution can disperse the stressed parts against which the first elastic member 208 and the second elastic member 204 are abutted, and can also better perform positioning constraints on the lower ends of the first elastic member 208 and the second elastic member 204 in the circumferential direction. Improve the reliability of the structural design of the electric valve. The structural scheme of other parts of this embodiment is the same as or similar to that of the third embodiment.

FIG. 9 is a schematic structural diagram of the valve core rotor assembly according to the fifth embodiment of the present invention. Compared with the spool rotor assembly 20 of the first embodiment shown in FIG. 3 , the main difference of this embodiment is that the structure of the bushing 2012 is slightly different. In this embodiment, the bushing 2012 is covered above the valve shaft inner wall 2015 of the valve shaft 2011 , and the bushing 2012 is fixedly connected with the valve shaft 2011 .

The bushing 2012 of this embodiment further includes an extension portion 20122 formed by extending downward along its peripheral outer edge. At this time, the bushing 2012 is substantially in the shape of a shell, and the extension portion 20122 of the bushing 2012 is sleeved and fixed on the valve shaft 2011. outside the circumference. The structural scheme of other parts of this embodiment is the same as or similar to that of the first embodiment, and at this time, the bushing 2012 is not located in the inner wall portion 2015 of the valve shaft.

Therefore, the bushing 2012 may be partially located in the inner wall portion 2015 of the valve shaft, may be completely located in the inner wall portion 2015 of the valve shaft, or may not be located entirely in the inner wall portion 2015 of the valve shaft.

FIG. 10 is a schematic structural diagram of the spool rotor assembly according to the sixth embodiment of the present invention. Compared with the first embodiment in FIG. 3 , the difference between this embodiment is that a gasket 207 is added between the upper end of the valve core 202 and the lower ends of the first elastic member 208 and the second elastic member 204 . The addition of the gasket 207 can reduce the frictional resistance of the valve core 202 relative to the relative rotational movement between the first elastic member 208 and the second elastic member 204, thereby reducing the situation that the valve core 202 rotates with the valve shaft assembly 201, thereby reducing the When the valve core head 202a rubs against the valve port 10a, the wear of the valve port 10a and the valve core head 202a can be reduced, and the operation reliability and operation life of the electric valve can be improved. In this embodiment, the lower ends of the first elastic member 208 and the second elastic member 204 are in contact with the gasket 207, and the gasket 207 is in contact with the valve core 202. The structural scheme of other parts of this embodiment can be the same as the first embodiment or similar.

FIG. 11 is a schematic structural diagram of the valve core rotor assembly according to the seventh embodiment of the present invention. In this embodiment, the valve shaft assembly 201 includes a valve shaft main body portion 2013 and a cylindrical member 2014, the valve shaft main body portion 2013 has a through hole penetrating up and down, and the valve shaft main body portion 2013 is provided with an external thread portion 201a (also referred to as a threaded portion 201a). The valve shaft main body 2013 is fixedly connected with the cylindrical member 2014, and the hole wall of the central through hole after the fixed connection forms the valve shaft inner wall 2015. In this embodiment, the valve shaft main body 2013 is located at Of course, the valve shaft main body 2013 may be fixed to the lower end of the cylindrical member 2014 without entering the through hole of the cylindrical member 2014 . The cylindrical member 2014 is substantially in the shape of a hollow cylinder, a cylindrical member abutting portion 20141 is provided substantially above the cylindrical member 2014, and a cylindrical member through-hole 201411 is provided at the approximate centerline position of the cylindrical member abutting portion 20141. The plane on which the cross section of the valve shaft assembly 201 is located, the orthographic projection of the through hole 201411 of the cylindrical member along the plane is located outside the orthographic projection of the main body portion 2051 of the ejector rod along the plane, and is located in the normal direction of the abutment portion 2052 of the ejector rod along the plane. In the projection, in this embodiment, the cross-sections of the through hole 201411 of the cylindrical member, the outer edge of the main body portion 2051 of the ejector rod, and the outer edge of the abutting portion 2052 of the ejector rod are all circular. The diameter of the valve core is larger than the diameter of the main body part 2051 of the ejector rod and smaller than the diameter of the abutting part 2052 of the ejector rod, so the abutting part 202b of the valve core can abut against the upper end surface of the main body part 2013 of the valve shaft. At this time, the upper part of the main body part 2013 of the valve shaft The end face forms the valve shaft abutting portion 20152, the inner hole wall of the valve shaft assembly 201 located on the valve shaft abutting portion 20152 forms the first valve shaft inner wall portion 20151, and the inner hole wall located under the valve shaft abutting portion 20152 forms the second valve The shaft inner wall portion 20153, the valve core abutting portion 202b, the first elastic member 208, and the second elastic member 204 are accommodated in the space defined by the cylindrical member 2014 and the valve shaft main body portion 2013, and the cylindrical member abutting portion 20141 and The first elastic members 208 abut against each other. Therefore, in this embodiment, the abutting portion 20141 of the cylindrical member includes the first abutting portion 20a. The portion 20141 includes a second abutting portion 20b, and the ejector main body portion 2051 can pass through the through-hole portion 201411 of the cylindrical member to abut against the restricting portion 20d, so the through-hole portion 201411 of the cylindrical member includes a channel portion 20c.

The cylindrical member 2014 may be integrally processed and formed, or two or more components may be fixedly connected.

Compared with the first embodiment in FIG. 3 , this embodiment is equivalent to re-dividing, integrating and changing the structure of the valve shaft assembly 201 on the basis of the first embodiment, and the functions of its geometrically corresponding parts are the same after assembly. . The structural scheme of other parts of this embodiment is the same as or similar to that of the first embodiment.

FIG. 12 is a schematic structural diagram of the valve core rotor assembly according to the eighth embodiment of the present invention.

Compared with the first embodiment in FIG. 3 , the main difference between this embodiment is that an upper washer 209 is added under the bushing 2012 , the upper washer 209 is provided with an upper washer hole 2091 , and the upper washer hole 2091 penetrates the upper washer On the upper and lower surfaces of 209, the upper end of the upper washer 209 is in contact with the bushing 2012, and the lower end surface of the upper washer 209 is in contact with the first elastic member 208. Therefore, the upper washer 209 includes the first abutting portion 20a. The bushing hole portion 20121 is protruded. At this time, the bushing hole portion 20121 includes the channel portion 20c, and the upper washer 209 can abut against the push rod abutting portion 2052. At this time, the upper washer 209 includes the second abutting portion 20b.

Of course, please refer to FIG. 13 , the upper gasket portion 209 can also be in the form of abutting against the second elastic member 204 instead of the first elastic member 208. At this time, the bushing 2012 includes the first abutting portion 20a, the upper The gasket 209 includes the second abutting portion 20b. Since the above is just the different fitting relationships formed by adding the gasket 209 on the valve shaft assembly 201 with different structures, the general concept of the gasket 209 does not deviate from the scope of this patent. The offset mentioned in this application includes direct offset and indirect offset.

Of course, it can be understood that the upper gasket 209 can also be applied to the structure of the electric valve in the seventh embodiment.

What this embodiment intends to illustrate is that some parts of the electric valve can be conventionally separated, integrated, etc., but their geometric counterparts have basically the same function after assembly, which still belongs to the concept of the present invention.

In the above embodiment, a form in which the ejector rod 205 can abut against the housing 30 is adopted. At this time, the housing 30 includes the restricting portion 20d. Of course, a housing connector can also be welded on the housing 30, and the ejector bar 205 and the housing connector can abut against each other. , at this time, the member that abuts against the ejector pin 205 is the restricting portion 20d. That is, the restricting portion 20d of the present application is a member that can abut against the ejector pin 205 , and is not necessarily limited to the housing 30 .

In addition, it should be noted that in the embodiments shown in FIG. 7 (third embodiment), FIG. 8 (fourth embodiment), and FIG. 10 (sixth embodiment) in this specification, in the first elastic member 208 A gasket or a gasket is added to the lower end surface (the central through hole of the gasket and gasket can be in the form of a closed hole or an opening). In addition, in order to further reduce the frictional resistance of relative rotation on the upper and lower surfaces of the above-mentioned washer or gasket subject to rotational friction fit, a coating with lubricating and wear-resistant function (such as containing polytetrafluoroethylene) can be sprayed or plated on its surface. vinyl fluoride, or a coating containing graphite, or a molybdenum disulfide component), thereby increasing the service life of the electric valve.

On the basis of the above embodiments, using the core structure of the present invention, making some adaptive changes in adding anti-friction washers or gaskets should fall within the scope of protection of the patent claims of the present invention.

It is worth noting that, in the above-mentioned formation method of the valve port and whether to set up a nozzle, etc., this solution provides many solutions, and the label "can" is used in the description, so it can be understood that the application of this application cannot be "may" should be understood as "must".

In addition, on the basis of the above embodiment, the valve core, valve shaft and bushing are assembled separately, or mechanically divided at different positions, but the functions of their geometrically corresponding parts are not substantially changed, and these are adapted. The combined structure should also fall within the scope of protection of the patent claims of the present invention.

It should be noted that the orientation nouns such as upper, lower, left and right mentioned in this embodiment are all based on the drawings of the description and are introduced for the convenience of description; Ordinal numbers such as "second" are also introduced for the convenience of description, and do not imply any limitation on any order of the components.

The electric valve provided by the present invention has been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

An electric valve, characterized in that it comprises a valve body and a coil (40), the coil (40) is sleeved on the valve body, and the valve body comprises a valve seat part (10) and a valve core rotor assembly (20) ), the valve core rotor assembly (20) includes a valve shaft assembly (201), a valve core (202), a first elastic member (208), a second elastic member (204) and a top rod (205);

The valve shaft assembly (201) includes a valve shaft abutting portion (20152);

The valve core (202) is passed through the valve shaft assembly (201), the valve core (202) includes a valve core abutting part (202b), and the valve core abutting part (202b) can be connected to the valve core (202b). The valve shaft abutting part (20152) abuts against;

The push rod (205) includes a push rod body portion (2051) and a push rod abutting portion (2052), and the push rod abutting portion (2052) is supported on the upper end of the second elastic member (204), the second elastic member (204) is supported on the valve core (202);

The first elastic member (208) is sleeved on the second elastic member (204), the valve core rotor assembly (20) further includes a first abutting portion (20a), and the first elastic member (208) The upper end of the valve is abutted against the first abutting portion (20a), and the lower end of the first elastic member (208) is abutted against the valve core (202); the valve shaft assembly (201) further includes a channel portion (20c), the mandrel body part (2051) passes through the channel part (20c);

The valve body further includes a restricting portion (20d), the valve seat member (10) includes an inner thread portion (10b), the valve shaft assembly (201) includes an outer thread portion (201a), and the inner thread portion ( 10b) When the external thread portion (201a) is in a non-threaded state, the push rod body portion (2051) is in contact with the restricting portion (20d), and the upper end portion of the second elastic member (204) is in contact with the limiting portion (20d). The push rod abutting portion (2052) abuts against, the lower end portion of the second elastic member (204) abuts against the valve core (202), and the valve core abutting portion (202b) abuts against the valve shaft The connection part (20152) is offset.
The electric valve according to claim 1, characterized in that, the valve core rotor assembly (20) further comprises a second abutting part (20b), and the second abutting part (20b) is capable of being connected with the ejector rod The abutting parts (2052) abut against each other.
The electric valve according to claim 1, wherein the valve shaft assembly (201) comprises a valve shaft (2011) and a bushing (2012), the bushing (2012) and the valve shaft (2011) For fixed connection, the bushing (2012) includes a bushing hole portion (20121), the push rod body portion (2051) passes through the bushing hole portion (20121), and the bushing hole portion (20121) includes the channel portion (20c).
The electric valve according to claim 4, wherein the push rod abutting portion (2052) is capable of abutting against the bushing (2012), and the bushing (2012) includes the second abutting portion (20b); the first elastic member (208) abuts against the bushing (2012), and the bushing (2012) includes the first abutting portion (20a).
The electric valve according to claim 3, further comprising an upper washer (209), the upper washer (209) comprising an upper washer hole portion (2091), and the ejector rod body portion (2051) passing through the upper washer (2091) In the hole portion (2091) of the upper washer, the upper washer (209) is in contact with the bushing (2012), the upper washer (209) is in contact with the first elastic member (208), and the upper washer (209) is in contact with the first elastic member (208). 209) comprising the first abutting part (20a), the bushing (2012) abutting against the push rod abutting part (2052), and the bushing (2012) comprising the second abutting part ( 20b).
The electric valve according to claim 3, further comprising an upper washer (209), the upper washer (209) comprising an upper washer hole portion (2091), and the ejector rod body portion (2051) passing through the upper washer (2091) In the upper washer hole portion (2091), the upper washer (209) can abut against the bushing (2012), the bushing (2012) abuts against the first elastic member (208), and the bushing (2012) (2012) includes the first abutting portion (20a), the upper washer (209) abuts against the push rod abutting portion (2052), and the upper washer (209) includes the second abutting portion (20b).
The electric valve according to claim 1, characterized in that the valve shaft assembly (201) comprises a valve shaft main body (2013) and a cylindrical member (2014), the valve shaft main body (2013) and the valve shaft main body (2013) and the The cylindrical member (2014) is fixedly connected, and the valve shaft main body portion (2013) includes the external thread portion (201a);

The cylindrical member (2014) includes a cylindrical member abutting portion (20b), the cylindrical member abutting portion (20b) includes a cylindrical member through-hole (201411), and the ejector rod body portion (2051) passes through passing through the cylindrical member through hole (201411), and the cylindrical member through hole (201411) includes the channel portion (20c);
The electric valve according to claim 7, wherein the abutting portion (20b) of the cylindrical member abuts against the first elastic member (208), and the abutting portion (20b) of the cylindrical member includes the The first abutting portion (20a), the cylindrical member abutting portion (20b) can abut against the ejector rod abutting portion (2052), and the cylindrical member abutting portion (20b) includes the first abutting portion (20b). Two abutting parts (20b).
The electric valve according to claim 7, further comprising an upper washer (209), the upper washer (209) comprising an upper washer hole portion (2091), the ejector rod body portion (2051) passing through the upper washer (2091) In the upper washer hole portion (2091), the upper washer (209) abuts against the cylindrical member abutting portion (20b), and the upper washer (209) abuts against the first elastic member (208), so The upper washer (209) includes the first abutting portion (20a), the cylindrical member abutting portion (20b) can abut against the ejector rod abutting portion (2052), and the cylindrical member abuts The portion (20b) includes the second abutment portion (20b).
The electric valve according to claim 7, further comprising an upper washer (209), the upper washer (209) comprising an upper washer hole portion (2091), the ejector rod body portion (2051) passing through the upper washer (2091) In the upper washer hole portion (2091), the upper washer (209) can abut against the cylindrical member abutting portion (20b), and the cylindrical member abutting portion (20b) and the first elastic member ( 208), the cylindrical member abutting portion (20b) includes the first abutting portion (20a), the upper washer (209) can abut against the ejector rod abutting portion (2052), the The upper gasket includes the abutting portion.
The electric valve according to any one of claims 1-10, further comprising a washer (206), the washer (206) abutting against the first elastic member (208), and the washer (206) offset with the valve core (202).
The electric valve according to claim 11, wherein the gasket (206) comprises a gasket hole (2061), and an end of the valve core (202) relatively close to the ejector rod (205) passes through the In the gasket hole (2061), a part of the valve core (202) is located in the second elastic member (204).
The electric valve according to claim 12, wherein the second elastic member (204) is in abutment with the washer (206).
The electric valve according to claim 12, wherein the second elastic member (204) is in abutment with the valve core (202).
The electric valve according to any one of claims 1-10, wherein the valve core (202) comprises a valve core main body (2021) and a valve core sleeve (2022), and the valve core sleeve (2022) It includes a valve core sleeve hole portion (20221), a part of the valve core body portion (2021) is located in the valve core sleeve hole portion (20221), the valve core body portion (2021) and the valve core sleeve (2022) ) fixed connection;

The first elastic member (208) abuts against the valve core sleeve (2022), the valve core sleeve (2022) can abut against the valve shaft abutting portion (20152), and the valve core sleeve (2022) The valve core abutting part (202b) is included.
The electric valve according to claim 15, wherein the valve core sleeve hole portion (20221) is a through hole, and the valve core body portion (2021) passes through the valve core sleeve hole portion (20221), A portion of the valve core body portion (2021) is located in the second elastic member (204).
The electric valve according to any one of claims 1-10, characterized in that it further comprises a casing (30), the casing (30) is fixedly connected with the valve seat member (10), and the casing (30) The restriction portion (20d) is included.
The electric valve according to any one of claims 1-10, characterized in that it further comprises a housing (30) and a housing connecting piece, the housing connecting piece is fixedly connected with the housing (30), and the housing connecting piece The restriction portion (20d) is included.