CN114838187A

CN114838187A - Electric valve

Info

Publication number: CN114838187A
Application number: CN202111307370.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2021-02-01
Filing date: 2021-11-05
Publication date: 2022-08-02
Anticipated expiration: 2041-11-05
Also published as: CN114838185B; CN114838186A; CN114838187B; CN114838186B; WO2022161429A1; CN114838185A

Abstract

An electrically operated valve comprises a valve seat component and a valve core rotor component; the valve core rotor assembly comprises a valve shaft assembly, a valve core part, a first elastic piece, a second elastic piece, a butting part and an ejector rod; the valve shaft assembly comprises a valve shaft abutting part and a spring abutting part; the first valve core abutting part of the valve core component can abut against the valve shaft abutting part; the ejector rod comprises an ejector rod main body part and an ejector rod abutting part, and part of the ejector rod main body part extends out of a through hole at the upper end of the valve shaft assembly; the upper end part of the first elastic part abuts against the spring abutting part, the lower end part of the first elastic part abuts against the first abutting part, the second abutting part can abut against the second valve core abutting part, and the third abutting part can abut against the valve shaft assembly; the first elastic piece is sleeved outside the second elastic piece in a sleeved mode, the upper end portion of the second elastic piece abuts against the ejector rod abutting portion, the ejector rod abutting portion can abut against the spring abutting portion, the abutting portion comprises an abutting portion hole portion, and the lower end portion of the second elastic piece abuts against the third valve core abutting portion of the valve core component through the abutting portion hole portion.

Description

Electric valve

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

CN109723884A discloses an electric valve having a guide bush 20, a valve shaft holder 30, a fixed male screw portion 23 provided on the guide bush 20, and a movable female screw portion 33 provided on the valve shaft holder 30, wherein the fixed male screw portion 23 and the movable female screw portion 33 constitute a screw feeding mechanism 28 of the electric valve.

In the valve shaft 10 of the electric valve, a compression coil spring (urging member) 60 is disposed in a compressed manner so as to be inserted into the upper small diameter portion 11 of the valve shaft 10, with a disk-shaped pressing plate 61 disposed on the lower surface side of the top portion 32 of the valve shaft holder 30 being interposed between a stepped surface 13 formed between the upper small diameter portion 11 and the lower large diameter portion 12 of the valve shaft 10 and the lower surface of the top portion 32 of the valve shaft holder 30, and a return spring 75 is disposed on the outer side of the fixing member 70 in the axial direction of the compression coil spring 60.

[ summary of the invention ]

The invention aims to provide an electric valve, which comprises a valve body, wherein the valve body comprises a valve seat part, a valve core rotor component and a shell;

the valve seat member includes a nut including an internal threaded portion; the valve seat component is fixedly connected with the shell;

the valve core rotor assembly comprises a valve shaft assembly, a valve core part, a first elastic piece, a second elastic piece, a butting part and an ejector rod;

the valve shaft assembly comprises a valve shaft abutting part, an external thread part and a spring abutting part, wherein the external thread part can be in threaded fit with the internal thread part;

the valve core component comprises a first valve core abutting part which can abut against the valve shaft abutting part;

the ejector rod comprises an ejector rod main body part and an ejector rod abutting part, part of the ejector rod main body part extends out of the through hole at the upper end of the valve shaft assembly, and the ejector rod main body part can abut against the shell;

the upper end part of the first elastic part abuts against the spring abutting part, the abutting part comprises a first abutting part, the lower end part of the first elastic part abuts against the first abutting part, the abutting part comprises a second abutting part, the valve core part comprises a second valve core abutting part, the second abutting part can abut against the second valve core abutting part, the abutting part comprises a third abutting part, and the third abutting part can abut against the valve shaft assembly;

the first elastic piece is sleeved outside the second elastic piece in a sleeved mode, the upper end portion of the second elastic piece abuts against the ejector rod abutting portion, the ejector rod abutting portion can abut against the spring abutting portion, the abutting portion comprises an abutting portion hole portion, the valve core component comprises a third valve core abutting portion, and the lower end portion of the second elastic piece abuts against the third valve core abutting portion through the abutting portion hole portion.

According to the electronic expansion valve, the first elastic part is sleeved outside the second elastic part, so that the height of the electric valve can be reduced, and the installation space of the electric valve in relevant equipment can be saved.

[ description of the drawings ]

Figure 1 is a cross-sectional view of the electrically operated valve of the present invention in a fully closed condition;

figure 2 is a schematic view of the construction of the valve seat component of the electric valve of the present invention;

figure 3 is a schematic view of the construction of the rotor assembly with the electrically operated valve of the present invention in a fully closed position and a close-up view thereof;

FIG. 4 is a sectional view of the valve body of the electrically operated valve of the present invention opened to a position where the valve core just does not bear the elastic force of the first elastic member, and a partially enlarged view thereof;

FIG. 5 is a cross-sectional view of the valve body of the present invention with the electric valve open to the point where the head of the valve cartridge just does not contact the valve port, and a partial enlarged view thereof;

FIG. 6 is a cross-sectional view of the valve body with the electric valve open to the maximum opening and a partial enlarged view thereof in accordance with the present invention;

figure 7 is a cross-sectional view of the valve body of the electrically operated valve of the present invention shown over-opened to thread pair unthreading, and a partial enlarged view thereof;

figure 8 is a sectional view of the valve body of a second embodiment of the electrically operated valve of the present invention opened to a maximum opening and a partially enlarged view thereof;

figure 9 is a cross-sectional view of the valve body of a third embodiment of the electrically operated valve of the present invention opened to a maximum opening and a partial enlarged view thereof;

figure 10 is a cross-sectional view of the valve body of a fourth embodiment of the electrically operated valve of the present invention opened to a maximum opening and a partial enlarged view thereof;

figure 11 is a cross-sectional view of the valve body of a fifth embodiment of the electrically operated valve of the present invention opened to a maximum opening and a partial enlarged view thereof;

figure 12 is a cross-sectional view of the body of a sixth embodiment of the electrically operated valve of the present invention open to a maximum opening and a partial enlarged view thereof;

fig. 13 is a sectional view of a valve body of an electric valve according to a seventh embodiment of the present invention, in a fully closed state, and a partially enlarged view thereof.

Fig. 14 is a sectional view of a valve body of an electric valve according to an eighth embodiment of the present invention in a fully closed state, and a partially enlarged view thereof.

Fig. 15 is a sectional view of a valve body of an electric valve according to a ninth embodiment of the present invention, which is opened to a maximum opening degree, and a partial enlarged view thereof.

Fig. 16 is a sectional view of a valve body of an electric valve according to a tenth embodiment of the electric valve of the present invention in a fully closed state, and a partially enlarged view thereof.

Fig. 17 is a sectional view of a valve body of an electric valve according to an eleventh embodiment of the present invention, which is opened to a maximum opening degree, and a partially enlarged view thereof.

Figure 18 is a cross-sectional view of the valve body of an electric valve in accordance with a twelfth embodiment of the electric valve in accordance with the present invention, when the electric valve is opened to a maximum opening degree, and a partially enlarged view thereof;

figure 19 is a cross-sectional view of a prior art electrically operated valve;

wherein fig. 1-18 include the following reference numerals:

10a valve seat member; 101 a valve seat; 102 a nut; 103 a first pipe connecting portion; 104 a second pipe connecting part; 10a valve port; 10b an internal threaded portion; 10c fixing the stopper; 10d a first access channel; 10e a second access passage; 20a spool rotor assembly; 201a valve shaft assembly; 2011 the valve shaft; 2012 a bushing; 20121 a bushing hole portion; 2013 a valve shaft body; 2014 a barrel; 20141 a barrel abutment; 201411 a barrel through bore portion; 2015 valve shaft inner wall portion; 20151 a first valve shaft inner wall portion; 20152 a stepped portion; 20153 second valve shaft inner wall portion; 20154, a valve shaft abutment; 20155 a third spool inner wall portion; 2016 an outer edge portion; 20161 a first peripheral portion; 20162 a second peripheral portion; 201a male threaded portion; 201b a movable stopper; 201c a rotor fixing part; 202a spool component; 2021 a valve body portion; 2022 valve core case; 20221 a spool socket portion; 202a valve element head; 202b a first spool abutment; 202c a second spool abutment; 202d a third spool abutment; 202e steel ball receiving portion; 2024 steel ball; 203 a rotor; 204 a second elastic member; 205 a top rod; 2051 a push rod main body part; 2052 ejector pin abutting part; 206 against the part; 206a first abutment; 206b a second abutment; 206c a third abutment; 2061 a washer member; 20611 a washer aperture portion; 2062 abutting against the frame; 20621 abutting the top of the frame; 20622 abutting the side of the frame; 20623 is abutted against the frame hole; a carrier member 207; 208 a first resilient member; 20a spring abutment; 30 a housing; 40 coils.

[ detailed description ] embodiments

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

Referring to fig. 1 to 7, fig. 1 is a cross-sectional view of an electrically operated valve of the present invention in a fully closed state; figure 2 is a schematic view of the construction of the valve seat component of the electric valve of the present invention; figure 3 is a schematic view of the construction of the rotor assembly with the electrically operated valve of the present invention in a fully closed position and a close-up view thereof; FIG. 4 is a sectional view of the valve body when the electric valve of the present invention is opened to a position where the valve core just does not bear the elastic force of the first elastic member, and a partial enlarged view thereof; FIG. 5 is a cross-sectional view of the valve body of the present invention with the electric valve open to the point where the head of the valve cartridge just does not contact the valve port, and a partial enlarged view thereof; FIG. 6 is a cross-sectional view of the valve body with the electric valve open to the maximum opening and a partial enlarged view thereof in accordance with the present invention; figure 7 is a cross-sectional view of the valve body of the electrically operated valve of the present invention shown over-opened to thread pair unthreading, and a partial enlarged view thereof;

referring to fig. 1 to fig. 3, in an embodiment, the electric valve provided by the present invention includes a valve body and a coil 40, wherein the coil 40 is sleeved on the valve body, and the valve body includes a valve core rotor assembly 20 (shown in fig. 3), a valve seat member 10 (shown in fig. 2) and a housing 30 (shown in fig. 1). The coil 40 of the electric valve is connected with a driving controller, and after the driving controller is electrified, a pulse driving signal is sent to the coil 40, and the coil 40 generates a changing magnetic field, so that the valve core rotor assembly 20 of the electric valve is driven to rotate forwards or reversely.

One end of the housing 30 is open, the housing 30 is a thin-walled member and has a shape of a housing, and the lower open side of the housing 30 is hermetically welded to the valve seat member 10, thereby forming a receiving chamber for receiving an upper half portion of a nut 102 (mentioned below) and a main body portion of a core rotor assembly 20 (mentioned below).

Referring to fig. 3, 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 and a bushing 2012, the bushing 2012 is fixed to a substantially end position of the valve shaft 2011, and the bushing 2012 includes a bushing hole portion 20121 penetrating through an upper surface and a lower surface of the bushing 2012. The valve shaft 2011 is provided with the male screw portion 201 a.

Referring to fig. 2, the valve seat member 10 includes a nut 102, an inner hole portion of the nut 102 is provided with an internal thread portion 10b, and the valve shaft 2011 is in threaded fit with the nut 102, so that when the valve core rotor assembly 20 rotates, the valve shaft 2011 can displace along the axial direction, and thus the valve core member 202 can be driven to realize the opening and closing of the valve port 10 a.

Referring to fig. 1 and 2, the valve seat member 10 includes a valve port 10a, and a first inlet/outlet passage 10d and a second inlet/outlet passage 10e, the valve port 10a is capable of communicating with the first inlet/outlet passage 10d and the second inlet/outlet passage 10e to allow a fluid medium (for example, a refrigerant) to pass therethrough, a through hole penetrating vertically is provided at a substantially central position of the valve seat member 10, a female screw portion 10b (which may be referred to as a fixed screw portion) is provided on an inner wall of the through hole, and the female screw portion 10b is combined with a male screw portion 201a (which may be referred to as a movable screw portion) provided at a substantially lower position of the valve shaft 2011 to constitute a screw feeding mechanism (screw pair) of the electric valve.

In the present embodiment, the valve seat member 10 includes the nut 102, the nut 102 has a through hole, the through hole inner wall of the nut 102 is provided with the female screw portion 10b, the valve seat member 10 further includes the valve seat 101, a portion of the nut 102 is located in the valve seat 101, and the nut 102 is fixedly connected to the valve seat 101 (for example, a method of integrally injection molding the coupling body as an insert with the nut 102, and then welding or press-fitting the coupling body to the valve seat 101, or a method of directly press-fitting and fixing the nut 102 to the valve seat 101, and the like are employed, in the present embodiment, the coupling body is integrally injection molded with the nut 102 as an insert, and the coupling body is welded and fixed to the valve seat 101, and the valve port 10a is integrally formed with the valve seat 101 (of course, a form in which the valve port 10a is formed in another member, and then the member is fixedly connected to the valve seat 101 may be employed), in the present embodiment, the valve seat 101 is fixedly connected to the first connecting pipe portion 103 and the second connecting pipe portion 104, and the first connecting pipe portion 103 and the second connecting pipe portion 104 serve as an inflow or outflow passage for the fluid medium of the motor-operated valve and are generally used for connection to a system pipe when installed in a cooling or heating system such as an air conditioner.

In the present embodiment, the first connecting pipe portion 103 and the second connecting pipe portion 104 are welded to the valve seat 101, but it is needless to say that the first connecting pipe portion 103 and the second connecting pipe portion 104 are not provided, and a flow path through which a refrigerant fluid passes may be directly provided in the valve seat 101, or the first connecting pipe portion 103 and the second connecting pipe portion 104 may be connected by flange sealing, for example, when the motor-operated valve is applied to an automobile air conditioner, a heat pump, or the like, which requires quick maintenance. In the present embodiment, the first pipe connecting portion 103 and the second pipe connecting portion 104 are provided in an electrically operated valve.

Referring to fig. 2 and fig. 1, the nut 102 is provided with a fixed stop portion 10c protruding from the annular base body, and the fixed stop portion is matched with a movable stop portion 201b provided on the valve core rotor assembly 20, so as to constitute a stop mechanism at the lower end of the stroke of the present electric valve, that is, when the valve core 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, so as to limit the downward movement of the valve core rotor assembly 20 in the axial direction, and thus, the downward movement stroke of the valve core rotor assembly 20 can be controlled.

Referring to fig. 3, the valve core rotor assembly 20 further includes a rotor 203 and a valve core member 202, the rotor 203 has magnetic poles in a circumferential direction, the valve core member 202 is disposed through a central through hole of the valve shaft 2011, in addition, the valve core rotor assembly 20 further includes a first elastic member 208 and a second elastic member 204 disposed in the central through hole of the valve shaft 2011, the first elastic member 208 is externally sleeved on the second elastic member 204, and a plunger 205 is disposed at an upper end portion of the second elastic member 204.

The jack 205 includes a jack main body portion 2051 and a jack abutting portion 2052, and the jack abutting portion 2052 is substantially a structure formed by circumferential extension of the jack main body portion 2051. The jack abutting portion 2052 is located below the bushing 2012, and a portion of the jack main body portion 2051, which can abut against the housing 30, passes through the bushing hole portion 20121. The push rod abutting part 2052 is located at the inner edge of the first elastic member 208, the upper end of the first elastic member 208 abuts against the bushing 2012, and the elastic load thereof does not act on the push rod 205 at all times.

The lower end of the first elastic member 208 abuts against an abutting member 206 (mentioned later), and the upper end of the first elastic member 208 abuts against a bushing 2012. The lower end of the second elastic member 204 abuts against the valve core member 202, and the upper end of the second elastic member 204 abuts against the plunger abutting portion 2052 of the plunger 205.

Referring to fig. 3, the electric valve provided in this embodiment includes a spring abutting portion 20a, where the spring abutting portion 20a is approximately a portion where the valve shaft assembly 201 abuts against an upper end of the first elastic member 208 and an upper end of the second elastic member 204 (including direct abutting or indirect abutting, in this embodiment, the first elastic member 208 abuts against the bushing 2012 directly, and the second elastic member 204 abuts against the bushing 2012 indirectly through the ejector abutting portion 2052), the elastic loads of the first elastic member 208 and the second elastic member 204 can be directly or indirectly transmitted to the bushing 2012, the bushing 2012 receives the elastic loads of the first elastic member 208 and the second elastic member 204, and the valve shaft assembly 201 abuts against the first elastic member 208 and the second elastic member 204, and in this embodiment, the bushing 2012 includes the spring abutting portion 20 a.

Referring to fig. 3, in the present embodiment, the valve shaft 2011 includes a hole penetrating vertically, the inner wall of the through hole forms a valve shaft inner wall portion 2015 approximately, the inner diameters of the valve shaft inner wall portions 2015 are not the same in the axial direction of the valve shaft 2011, specifically, the valve shaft inner wall portion 2015 includes a first valve shaft inner wall portion 20151, a stepped portion 20152, a second valve shaft inner wall portion 20153, a valve shaft abutting portion 20154 and a third valve shaft inner wall portion 20155, in the axial direction of the valve shaft 2011, the first valve shaft inner wall portion 20151 is located above the second valve shaft inner wall portion 20153, the second valve shaft inner wall portion 20153 is located above the third valve shaft inner wall portion 20155, and in a plane of the cross section of the valve shaft 2011, an orthographic projection (the orthographic projection is a closed torus or a closed torus) of the first valve shaft inner wall portion 20151 along the plane is located outside an orthographic projection (the orthographic projection is a closed torus) of the second valve shaft inner wall portion 20153 along the plane, and an orthographic projection (the torus) of the third valve shaft inner wall portion 20153 is located outside the plane along the closed second valve shaft inner wall portion Outside the orthographic projection of the wall portion 20155 along the plane (the orthographic projection is a closed line or an annular surface), generally, for convenience of processing and manufacturing, the cross sections of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155 are all set to be circular, in this case, the diameter of the first valve shaft inner wall portion 20151 is larger than the diameter of the second valve shaft inner wall portion 20153, the diameter of the second valve shaft inner wall portion 20153 is larger than the diameter of the third valve shaft inner wall portion 20155, and in this embodiment, the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155 are all of equal diameter in the height direction, and therefore, the orthographic projection of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153 and the third valve shaft portion 20155 along the plane where the cross section of the valve shaft inner wall portion 20155 is located is a circle.

Further, the stepped portion 20152 and the valve shaft abutment 20154 have an extension distance in the horizontal direction, the stepped portion 20152 is located above the valve shaft abutment 20154 in the axial direction of the valve shaft 2011, the outer edge of the stepped portion 20152 intersects with the first valve shaft inner wall 20151, the inner edge intersects with the second valve shaft inner wall 20153, the outer edge of the valve shaft abutment 20154 intersects with the second valve shaft inner wall 20153, and the inner edge intersects with the third valve shaft inner wall 20155, when the cross sections of the first valve shaft inner wall 20151, the second valve shaft inner wall 20153 and the third valve shaft inner wall 20155 are all circular, the stepped portion 20152 and the valve shaft abutment 20154 are all circular in shape in the orthogonal projection along the plane where the cross section of the valve shaft 2011 is located, in this embodiment, the stepped portion 20152 and the valve shaft abutment 20154 are in the horizontal direction, of course, the stepped portion 20152 and the valve shaft abutment 20154 may be provided not completely horizontal, for example, in a direction away from the axis of the valve shaft 2011, the valve shaft abutment 20154 gradually extends upward or downward (the step 20152 is the same), and it is understood that the step 20152 and the valve shaft abutment 20154 only need to have an extension distance in the horizontal direction.

With continued reference to fig. 3, in this embodiment, the valve shaft 2011 includes a peripheral edge portion 2016, the peripheral edge portion 2016 includes a first peripheral edge portion 20161 and a second peripheral edge portion 20162, the first peripheral edge portion 20161 is located above the second peripheral edge portion 20162, an orthographic projection of the first peripheral edge portion 20161 along the plane is located outside an orthographic projection of the second peripheral edge portion 20162 along the plane in a plane of a cross section of the valve shaft 2011, generally, for processing convenience, the cross sections of the first peripheral edge portion 20161 and the second peripheral edge portion 20162 are both set to be circular, a rotor fixing portion 201c is located at a portion of the valve shaft 2011 of the first peripheral edge portion 20161, the rotor 203 and the rotor fixing portion 201c may be fixed by direct or indirect welding, riveting, injection molding of magnetic plastic material, glue bonding, etc., in this embodiment, the connecting member is used as an insert for injection molding connection with magnetic plastic material, and then the valve shaft 2011 is fixedly connected with the connecting member by welding, when the rotor 203 and the valve shaft 2011 are directly connected, the valve shaft 2011 may be integrally connected to the magnetic plastic material by injection molding as an insert.

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

Referring to fig. 3, the electric valve of the present embodiment 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, the first elastic member 208 and the second elastic member 204 are located in the valve shaft assembly 201, the outer diameter of the cylinder of the first elastic member 208 is slightly smaller than the diameter of the inner wall 20151 of the first valve shaft, and the diameter of the inner edge of the first elastic member 208 is larger than the outer diameter of the cylinder of the second elastic member 204. The second elastic member 204 is disposed inside the first elastic member 208, i.e. 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 sleeved on the second elastic member 204. Because the second elastic element 204 can be nested in the inner diameter hole of the first elastic element 208, compared with the background art, the electrically-operated valve with the structure of the present invention can effectively reduce the height size of the electrically-operated valve, which is beneficial to saving the installation space of the electrically-operated valve in the related equipment.

Referring to fig. 3, in the present embodiment, the valve core member 202 is inserted into the valve shaft 2011 (a portion of the valve core member 202 is located in the inner wall 2015 of the valve shaft), and furthermore, the valve core member 202 has a stepped shaft-like structure, which includes a valve core head 202a, the valve core head 202a is located at a substantially lower end of the valve core member 202, a tip shape of the valve core head 202a is related to a flow rate regulation curve required by the electric valve, the valve core member 202 further includes a first valve core abutment portion 202b, the first valve core abutment portion 202b is located at a substantially upper end of the valve core member 202, in the present embodiment, in a plane of a cross section of the valve core member 202, an orthogonal projection of the valve core head 202a along the plane is located in an orthogonal projection of the first valve core abutment portion 202b along the plane, in the present embodiment, the cross sections of the valve core head 202a and the first valve core abutment portion 202b are both circular, so that a diameter of the first valve core abutment portion 202b is larger than a diameter of the valve core head 202a, in the present embodiment, the valve body member 202 is inserted into the valve shaft inner wall portion 2015 of the valve shaft 2011 in the top-down direction, the first valve body contact portion 202b thereof can be brought into contact with the valve shaft contact portion 20154, and the valve body head portion 202a thereof protrudes from the third valve shaft inner wall portion 20155. In the plane of the cross section of the valve body 202, since an area of overlap exists between an orthographic projection of the first valve body contact portion 202b along the plane and an orthographic projection of the valve shaft contact portion 20154 along the plane, the first valve body contact portion 202b can abut against the valve shaft contact portion 20154 (of course, when a gasket or the like is provided between the valve shaft contact portion 20154 and the first valve body contact portion 202b so as not to abut directly, the projection relationship between the first valve body contact portion 202b and the valve shaft contact portion 20154 may not satisfy the above relationship), in the present embodiment, the outer edge of the first valve body contact portion 202b, the cross-sectional shape of the second valve shaft inner wall portion 20153, and the cross-sectional shape of the third valve shaft inner wall portion 20155 are all circular, the diameter of the first valve body contact portion 202b is slightly smaller than the diameter of the second valve shaft inner wall portion 20153, the diameter of the first valve body contact portion 202b is larger than the diameter of the third valve shaft inner wall portion 20155, and the largest diameter of the valve body head portion 202a is slightly smaller than the diameter of the third shaft inner wall portion 20155, at this time, the valve body member 202 can be supported on the valve shaft abutment 20154 of the valve shaft 2011.

Referring to fig. 3, the electrically operated valve provided by the present application further includes an abutting member 206, the abutting member 206 includes a first abutting portion 206a, a lower end portion of the first elastic member 208 abuts against the first abutting portion 206a, the abutting member 206 further includes a second abutting portion 206b, the second abutting portion 206b can abut against a second valve core abutting portion 202c (mentioned below), the abutting member 206 further includes a third abutting portion 206c, the third abutting portion 206c can abut against the valve shaft assembly 201 (the stepped portion 20152 in this embodiment), the abutting member 206 further includes an abutting member hole portion 206d, the valve core member 202 further includes a third valve core abutting portion 202d, and the second spring 204 or the valve core member 202 can pass through the abutting member hole portion 206d, so that the lower end portion of the second spring 204 abuts against the third valve core abutting portion 202d of the valve core member 202.

With continued reference to fig. 3, in the present embodiment, the abutting member 206 is a washer member 2061, and the washer member 2061 can abut against the step portion 20152 (in the fully closed state in fig. 3, the washer member 2061 is in the non-abutting state with respect to the step portion 20152), specifically, in the plane of the cross-section of the electric valve, there is an overlapping area between the orthographic projection of the washer member 2061 along this plane and the orthographic projection of the step 20152 along this plane, and therefore, the washer member 2061 can abut against the step portion 20152 (of course, when 2 or more washer members 2061 are provided, the above relationship is not necessarily satisfied for each washer member 2061 and the step portion 20152), and in the present embodiment, the outer edge of the washer member 2061 and the inner edge of the step portion 20152 are both circular, and the outer diameter of the washer member 2061 is greater than the diameter of the second valve shaft inner wall portion 20153 and the outer diameter of the washer member 2061 is slightly less than the diameter of the first valve shaft inner wall portion 20151.

Therefore, in the present embodiment, the washer member 2061 includes the first abutting portion 206a (the portion of the washer member 2061 abutting against the first elastic piece 208), the washer member 2061 includes the third abutting portion 206c (the portion capable of abutting against the step portion 20152), the washer member 2061 further includes the washer hole portion 20611, the washer hole portion 20611 penetrates the upper and lower surfaces of the washer 2061, and the abutting member hole portion 206d is the washer hole portion 20611 in the present embodiment.

Referring to fig. 3, the valve core member 202 of the present embodiment includes a carrier member 207 and a valve core 2023, the carrier member 207 is located above the valve core 2023, the carrier member 207 abuts against the valve core 2023, and the carrier member 207 or the second elastic member 204 may pass through the gasket hole portion 20611 (in the present embodiment, the carrier member 207 passes through the gasket hole portion 20611). The second elastic member 204 abuts against the carrier member 207, and the elastic load of the second elastic member 204 can be transmitted to the valve element 2023 through the carrier member 207.

The valve core rotor assembly 20 shown in fig. 3 is in a fully closed state (i.e. a state when the valve core rotor assembly 20 is at the lowest end of its stroke), and in conjunction with fig. 1, the valve core head 202a abuts against and tightly presses the valve port 10a, and the first elastic member 208 and the second elastic member 204 are both in a compressed state, that is, the valve core part 202 (the bearing part 207 and the valve core 2023) receives two downward elastic forces at the same time, the first downward elastic force is derived from an elastic force generated by further compressing the first elastic member 208, and is transmitted to the valve core 2023 through the gasket part 2061 and the bearing part 207; the second downward elastic force is generated by the compression of the second elastic member 204, and is transmitted through the bearing member 207 and applied to the valve element 2023. The two elastic forces are superposed to provide pressing force between the valve core component 202 and the valve port 10a, so that the performance index of resisting reverse differential pressure when the electric valve is fully closed can be improved.

Compared with the electric valve in the background art, the electric valve of the invention is additionally provided with the second elastic part 204 in the first elastic part 208, and the elastic force of the second elastic part 204 can be superposed with the elastic force of the first elastic part 208, so that the elastic force acting on the valve core part 202 can be further improved, and the capability of resisting reverse differential pressure when the electric valve is fully closed can be further improved.

Because the first elastic member 208 and the second elastic member 204 are sleeved together, in order to reduce the possibility of the two being twisted, it is preferable that the spiral directions of the second elastic member 204 and the first elastic member 208 are opposite, so as to reduce the situation that the first elastic member 208 and the second elastic member 204 are jammed together.

In the state of the electrically operated valve in fig. 3, the carrier member 207 abuts against the washer member 2061, and the washer member 2061 is pushed up by the carrier member 207, specifically, in the present embodiment, the carrier member 207 includes the second spool abutment 202c (the portion abutting against the washer member 2061), and the washer member 2061 includes the second abutment 206b (the portion abutting against the carrier member 207).

In the present embodiment, in the plane of the cross section of the valve shaft assembly 201, there is an overlapping region between the orthographic projection of the washer member 2061 along the plane and the orthographic projection of the second valve spool abutment portion 202c along the plane, so that the washer member 2061 thereof can abut against the valve spool member 202 (in the present embodiment, the carrier member 207) (of course, when other members are provided between the washer member 2061 and the carrier member 207 so as to abut against each other, the above projective relationship may not be satisfied), in the present embodiment, the washer hole portions 20611 and the outermost edge of the carrier member 207 are both circular, the diameter of the washer hole portion 20611 is smaller than the diameter of the outer contour of the carrier member 207, and the diameter of the outer contour of the carrier member 207 is slightly smaller than the diameter of the second valve shaft inner wall portion 20153.

In this embodiment, the top of the valve element 2023 is in a ball top state, and the portion of the lower center of the bearing member 207 that fits the valve element 2023 is in a concave spherical shape, and the two are in point contact when the tops are tightly fitted. Here, the frictional resistance of the valve element 2023 against the rotation of the carrier member 207 can be reduced by adopting the point contact engagement, and theoretically, the frictional resistance between the two is small because the arm of the frictional force of the point contact is zero.

Therefore, after the valve element head 202a of the electric valve contacts the valve port 10a, the valve element 2023 is less likely to rotate relative to the valve port 10a, so that the rotational friction between the valve element head 202a and the valve port 10a can be reduced, and the problem of valve port leakage due to abrasion can be reduced.

Of course, it is a theoretical state that the contact point between the top of the valve element 2023 and the carrier member 207 is point contact, and it is difficult to ensure that the contact point between the top and the carrier member is point contact in the actual process.

Fig. 4 is a sectional view of the valve body of the present invention, when the electric valve is opened to a point where the spool member just does not carry the elastic load of the first elastic member, and a partially enlarged view thereof. In the position of the valve core rotor assembly 20 in fig. 4, compared with the rotor position when the electric valve is fully closed in fig. 1, the valve core rotor assembly 20 is opened upward, and the valve core head 202a still interferes with the valve port 10 a. At the critical point of the position of the valve core rotor assembly 20 shown in fig. 4, if the valve core rotor assembly 20 continues to open upward, the elastic force of the first elastic member 208 is carried by the step 20152 through the transmission of the washer 2061, and the carrier 207 and the valve core 2023 are no longer subjected to the elastic load of the first elastic member 208. At this time, the elastic force of the second elastic member 204 is still transmitted to the valve element 2023 through the bearing member 207, and the valve element 2023 is still subjected to the downward elastic load of the second elastic member 204. The valve body 2023 shown in fig. 4 is subjected to a downward elastic force by the second elastic member 204, the valve body head 202a abuts against the valve port 10a, the first valve body abutting portion 202b is at a distance h-k from the valve shaft abutting portion 20154, and h-k is greater than 0.

Fig. 5 is a sectional view of the valve body when the electric valve of the invention is opened until the head of the valve core just does not contact the valve port, and a partial enlarged view thereof. The position of the poppet rotor assembly 20 in fig. 5 is compared to the position of the poppet rotor assembly 20 in fig. 4 with an upward opening height h-k, where the poppet head 202a is just in the critical state abutting the valve port 10 a. The valve body 2023 is elastically urged downward by the second elastic member 204, and the first valve body abutment portion 202b thereof just contacts the valve shaft abutment portion 20154, and the elastic force of the first elastic member 208 is transmitted by the washer member 2061 and is carried by the stepped portion 20152. The second spool abutment 202c of the carrier member 207 is spaced from the second abutment 206b of the washer member 2061 by a distance h-k, and h-k > 0.

Fig. 5 shows a state in which the valve plug head 202a is just in a critical state of contacting the valve port 10a, and in the process of the electric valve requiring frequent opening and closing, when the valve plug head 202a is just in contact with and separated from the valve port 10a, the impact force and the abrasion between the two sealing portions are large. When the valve core head 202a is just in contact with the valve port 10a in the critical state (i.e., the state shown in fig. 5), the valve core 2023 is not subjected to the elastic load of the first elastic member 208 but only the elastic load of the second elastic member 204, and the elastic load of the first elastic member 208 on the gasket member 2061 is greater than the elastic load of the second elastic member 204 on the valve core member 202. Therefore, in the electrically operated valve of the present invention, the pressing force applied to the valve element 2023 at the moment of contact with and separation from the valve port 10a is not particularly large, so that the abrasion between the valve element 2023 and the valve port 10b can be reduced, thereby reducing the problem of leakage from the valve port 10a due to the abrasion.

Fig. 6 is a sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree, and a partially enlarged view thereof. When the spool rotor assembly 20 of the electric valve is opened from the position shown in fig. 5 to the position shown in fig. 6, the stem body 2051 is in contact with the housing 30, the spool 2023 is constantly subjected to the pressure difference between the two ends of the valve port 10a, the elastic force of the second elastic member 204, and its own weight, the first spool abutment 202b is constantly abutted against the valve shaft abutment 20154, and the elastic force of the first elastic member 208 is transmitted by the washer member 2061 and is borne by the step 20152. When the valve core rotor assembly 20 is at the position shown in fig. 6, the valve core rotor assembly 20 is opened to the maximum opening position in the normal operating state, and at this time, the top end of the top rod main body portion 2051 at the upper end of the valve core rotor assembly 20 just contacts the top inner wall of the housing 30.

Fig. 7 is a sectional view of the valve body when the electric valve of the invention is opened to the state that the thread pair is unscrewed, and a partial enlarged view thereof. From the state shown in fig. 6, if the spool rotor assembly 20 continues to open upward, an over-open state (over-open: a state in which the spool rotor assembly 20 opens upward beyond its prescribed upper limit stroke) occurs, and as the spool rotor assembly 20 moves upward, the second elastic member 204 is compressed downward, and in fig. 7, the second elastic member 204 is compressed downward by a compression amount m with respect to the state in fig. 6, and the spool rotor assembly 20 is subjected to a downward elastic load by the second elastic member 204. If the valve spindle assembly 201 is further opened excessively, the external thread portion 201a of the valve spindle assembly 201 is unscrewed from the internal thread portion 10b of the nut 102 (i.e., in the state shown in fig. 7), and after the unscrewing, the valve spindle assembly 20 will not move upward any more, and if the coil 40 drives the valve spindle assembly 20 in the direction in which the electric valve is closed, the valve spindle assembly 20 receives a downward elastic load from the second elastic member 204, and the thread pair is unscrewed when the valve spindle assembly 20 rotates.

It can be seen that in the present embodiment, the second elastic member 204 plays two roles: first, when the electric valve is in a fully closed state, the elastic force of the second elastic element 204 can enhance the tightening force between the valve plug 2023 and the valve port 10a, thereby improving the capability of the electric valve against reverse differential pressure; secondly, when the electric valve is over-opened, the second elastic member 204 presses the valve shaft assembly 201 downwards, so that the valve core rotor assembly 20 which is over-opened and unscrewed can be reset.

Referring to fig. 1, 4, 5 and 6, when the rotor member 20 is opened upward from the fully closed state to the fully opened state in fig. 4 or closed from the fully opened state in fig. 6 to the state in fig. 4 from the fully opened state in fig. 4, the valve element 2023 is not subjected to the elastic load of the first elastic member 208. Particularly, at the moment when the valve core head 202a contacts with the sealing portion of the valve port 10a, the valve core member 202 is not subjected to the elastic load of the first elastic member 208, so that the impact force of the valve needle member 202 on the valve port 10a can be reduced, and the friction force of the relative rotational movement between the two sealing portions can be reduced, thereby reducing the abrasion of the contact portion and prolonging the service life of the electric valve.

Referring to fig. 4, the core points of the structural features that can achieve the above functional effects in this embodiment are: when no other member is provided so that any two members (the valve shaft assembly 201 and the washer member 2061, and the valve body 2023 and the valve shaft assembly 201) indirectly abut against each other, the height h between the stepped portion 20152 and the valve shaft abutment portion 20154 is greater than the height k between the first valve body abutment portion 202b and the second valve body abutment portion 202c, that is, h > k. In fig. 4, 5 and 6, h > k, which is h-k > 0, is preferably greater than 0 and less than 0.3mm because the electric valve has a certain opening stroke.

Fig. 8 is a sectional view of the valve body of the electric valve according to the second embodiment of the present invention, which is opened to the maximum opening, and a partially enlarged view thereof.

The valve core 2023 of this embodiment includes a valve core main body portion 2021 and a valve core sleeve 2022, the valve core sleeve 2022 includes a valve core sleeve hole portion 20221, the valve core sleeve hole portion 20221 penetrates through the upper and lower surfaces of the valve core sleeve 2022, the upper end of the valve core main body portion 2021 penetrates through the valve core sleeve hole portion 20221, and the valve core main body portion 2021 and the valve core sleeve 2022 can be fixedly connected by press fitting, welding, or adhering.

Further, in the present embodiment, the spool head portion 202a is provided with a diameter larger than the diameter of the third spool inner wall portion 20155. The valve core main body part 2021 is inserted into the central through hole of the valve shaft 2011 from bottom to top, and then the valve core sleeve 2022 is sleeved and fixed at the approximate upper end position of the valve core main body part 2021 from top to bottom.

Of course, the valve core sleeve hole portion 20221 may also adopt a blind hole form, that is, the valve core main body portion 2021 is fixedly connected with the valve core sleeve 2022, but the valve core main body portion 2021 does not pass through the upper side of the valve core sleeve hole portion 20221, that is, the valve core sleeve hole portion 20221 of the present invention is not limited to the form of a through hole; alternatively, the valve body portion 2021 does not protrude from the valve core sleeve portion 20221, although the valve core sleeve portion 20221 is formed as a through hole.

In the present embodiment, the valve body sleeve 2022 can abut against the valve shaft abutment 20154, the valve body sleeve 2022 includes the first valve body abutment 202b, the carrier member 207 can receive the elastic load of the second elastic element 204 and transmit the elastic load of the second elastic element 204 to the valve body 2023, the carrier member 207 includes the third valve body abutment 202d, the washer member 2061 can be supported by the carrier member 207 and away from the step 20152, and the carrier member 207 includes the second valve body abutment 202 c.

Fig. 9 is a sectional view of the valve body of the electric valve according to the third embodiment of the present invention, which is opened to the maximum opening, and a partially enlarged view thereof.

Compared with the second embodiment in fig. 8 of the same opening degree state, the present embodiment is mainly distinguished in that: a portion of the carrier member 207 is located within the valve cartridge sleeve 2022, and the washer member 2061 is supported against the upper end surface of the valve cartridge sleeve 2022 during the raising of the valve cartridge member 202 relative to the valve shaft assembly 201, and in this embodiment, the valve cartridge sleeve 2022 includes the second valve cartridge abutment portion 202 c.

Fig. 10 is a sectional view of the valve body of the electric valve according to the fourth embodiment of the present invention, which is opened to the maximum opening degree, and a partially enlarged view thereof. Compared with the second embodiment in fig. 8 in the same opening state, the valve core sleeve 2022 has a slightly different structure, the valve core sleeve portion 20221 has a blind hole structure, the top of the valve core sleeve 2022 is in a spherical state, and the top surface of the valve core sleeve 2022 is in contact fit with the concave surface on the lower side of the center of the bearing component 207. The structure of other parts of this embodiment may be the same as or similar to that of the second embodiment in fig. 8.

Fig. 11 is a sectional view of the valve body of the electric valve according to the fifth embodiment of the present invention, which is opened to the maximum opening, and a partially enlarged view thereof. Compared with the first embodiment in fig. 5, the difference is mainly that the convex spherical surface on the top of the valve core 2023 is changed into a concave spherical surface, and the concave spherical surface on the lower side of the bearing part 207 is changed into a convex spherical surface, so that the matching efficacy of the two is the same after the change; in addition, the valve element 2023 is formed by separately processing two components and fixedly connecting the two components. The other parts of this embodiment may have the same or similar structure as the first embodiment in fig. 5.

Fig. 12 is a sectional view of the valve body of the electric valve according to the sixth embodiment of the present invention, which is opened to the maximum opening, and a partially enlarged view thereof. Compared with the fifth embodiment in fig. 11, the difference is mainly that: a steel ball accommodating part 202e is arranged at the top of the valve core 2023, the steel ball accommodating part 202e is a groove arranged at the top of the valve core 2023, a steel ball 2024 is arranged in the steel ball accommodating part 202e, and the spherical top of the steel ball 2024 is in contact with the lower end surface of the bearing part 207 to realize point contact. The steel ball 2024 has a smoother surface and higher hardness and wear resistance, so that the service life of the motion contact part of the electric valve can be further prolonged. The structure of other parts of this embodiment may be the same as or similar to that of the fifth embodiment in fig. 11.

Fig. 13 is a sectional view of a seventh embodiment of an electric valve of the present invention in a fully closed state, and a partially enlarged view thereof. The main difference from the first embodiment in fig. 4 is that the structure of the valve body member 202 is changed, specifically, the portion of the valve body 2023 corresponding to the receiving member 207 is configured as an integral structure, and in this case, the valve body member 202 includes a first valve body abutment portion 202b, a second valve body abutment portion 202c, and a third valve body abutment portion 202 d.

Fig. 14 is a sectional view of a valve body of an electric valve according to an eighth embodiment of the present invention in a fully closed state, and a partially enlarged view thereof. Compared with the seventh embodiment in fig. 13, the difference is mainly that the valve core member 202 does not pass through the washer hole portion 20611, and the second elastic member 204 passes through the washer hole portion 20611 to abut against the valve core member 202.

Fig. 15 is a sectional view of the valve body of the electric valve according to the ninth embodiment of the present invention, which is opened to the maximum opening degree, and a partially enlarged view thereof. Compared with the fifth embodiment shown in fig. 11, the structure of the carrier member 207 is changed, and the present embodiment is different mainly in that the carrier member 207 does not pass through the gasket hole portion 20611, and the second elastic element 204 passes through the gasket hole portion 20611 to abut against the carrier member 207.

Fig. 16 is a sectional view of a valve body of an electric valve according to a tenth embodiment of the present invention in a fully closed state, and a partially enlarged view thereof.

In the present embodiment, the structure of the valve shaft assembly 201 is changed, specifically, the valve shaft assembly 201 includes a valve shaft main body portion 2013 and a tubular member 2014, the valve shaft main body portion 2013 has a through hole penetrating up and down, the valve shaft main body portion 2013 is provided with a male screw portion 201a, the valve shaft main body portion 2013 is fixedly connected with the tubular member 2014, a valve shaft inner wall portion 2015 is formed in a substantial side wall area of a central through hole fixedly connected with the two, in the present embodiment, an upper end portion of the valve shaft main body portion 2013 extends into the through hole of the tubular member 2014, but of course, a form in which the valve shaft main body portion 2013 does not extend into the through hole of the tubular member 2014 and the valve shaft main body portion 2013 is fixed to a lower end of the tubular member 2014 may be adopted. The cylindrical member 2014 is substantially hollow and cylindrical, the cylindrical member 2014 is provided with a cylindrical member abutting portion 20141 substantially above the cylindrical member 2014, a cylindrical member through hole portion 201411 is provided substantially at the center of the cylindrical member abutting portion 20141, an orthographic projection of the cylindrical member through hole portion 201411 along the plane is positioned outside an orthographic projection of the ejector rod main body portion 2051 along the plane and is positioned in an orthographic projection of the ejector rod abutting portion 2052 along the plane at the plane of the cross section of the valve shaft assembly 201, in the present embodiment, the diameter of the cylindrical member through hole portion 201411 is larger than the diameter of the ejector rod main body portion 2051 and smaller than the diameter of the ejector rod abutting portion 2052, and therefore, the ejector rod abutting portion 2052 can abut against the cylindrical member abutting portion 20141.

In the present embodiment, the valve body 2023 can abut against the upper end surface of the valve shaft body 2013, the upper end surface of the valve shaft body 2013 forms a valve shaft abutment 20154, the first elastic piece 208 and the second elastic piece 204 are accommodated in the space defined by the cylindrical piece 2014 and the valve shaft body 2013, the cylindrical piece abutment 20141 abuts against the first elastic piece 208, and the cylindrical piece abutment 20141 can abut against the ejector pin abutment 2052, so that the cylindrical piece abutment 20141 in the present embodiment includes a spring abutment 20a, and the ejector pin body 2051 can pass through the cylindrical piece through hole 201411 and abut against the housing 30.

With continued reference to fig. 16, the abutment member 206 provided in the present embodiment includes an abutment shelf 2062, the abutment shelf 2062 being capable of abutting against a valve shaft abutment 20154. Specifically, the abutment shelf 2062 is substantially cylindrical in configuration and includes an abutment shelf top portion 20621 at the top and abutment shelf side portions 20622 formed to extend downwardly substantially along the peripheral edges of the abutment shelf top portion 20621.

In addition, in the present embodiment, the step portion 2015 is not provided on the valve shaft inner wall 2015, specifically, the first valve body abutment portion 202b can abut against the valve shaft abutment portion 20154, the abutment holder 2062 is sleeved on the valve body 2023, and the lower end of the abutment holder side portion 20622 of the abutment holder 2062 abuts against the valve shaft abutment portion 20154 (therefore, the step portion 2015 may not be provided on the valve shaft inner wall 2015, and the function of the step portion 20152 is realized by the valve shaft abutment portion 20154), the abutment holder 2062 includes the third abutment portion 206c (a portion abutting against the valve shaft abutment portion 20154) in the present embodiment, the abutment holder 20621 abuts against the first elastic member 208, and the abutment holder 2062 includes the first abutment portion 206a in the present embodiment.

In addition, in this embodiment, the abutting frame 2062 further includes an abutting frame hole 20623, the abutting frame hole 20623 penetrates through the upper and lower surfaces of the abutting frame top 20621, the upper end of the bearing member 207 penetrates through the abutting frame hole 20623, the upper end of the bearing member 207 penetrates through the second elastic member 204 and is located at the inner edge of the through hole of the second elastic member 204, and the abutting frame hole 206d is the abutting frame hole 20623.

Through the above arrangement, when the second elastic element 204 is about to radially deflect, the radial deflection of the second elastic element 204 can be reduced by the limitation of the bearing part 207, and the second elastic element 204 is more stable in the electric valve, which is beneficial to increasing the service life of the electric valve.

In the present embodiment, the height from the valve shaft abutment 20154 to the second abutment 206b is h, the distance from the first spool abutment 202b to the second spool abutment 202c is k, and in the state shown in fig. 16, the second abutment 206b and the second spool abutment 202c are in a state of just contacting each other, and at this time, the distance h-k between the first spool abutment 202b and the valve shaft abutment 20154 exists.

In contrast to the state when the first spool abutment portion 202b abuts against the valve shaft abutment portion 20154, when the spool member 202 is raised by a distance h-k relative to the valve shaft assembly 201, the abutment shelf top portion 20621 of the abutment shelf 2062 contacts the second spool abutment portion 202c, the abutment shelf top portion 20621 includes the second abutment portion 206b, the first spool abutment portion 202b and the valve shaft abutment portion 20154 are brought into a non-abutting state from the abutting state, and when the spool member 202 is further raised relative to the valve shaft assembly 201, the second abutment portion 206b of the abutment shelf 2062 abuts against the second spool abutment portion 202c, the spool member 202 receives the elastic force load of the first elastic member 208, and the elastic force of the first elastic member 208 can be transmitted to the valve port 10a through the spool 2023.

Of course, although the step 20152 is not provided in the embodiment, the step 20152 may be provided in the present application, and the step 20152 may be provided in the valve shaft inner wall 2015, so that the step 20152 may abut against the lower end of the abutment side 20622, thereby achieving the technical effect of the present application.

Fig. 17 is a sectional view of the valve body of the eleventh embodiment of the electrically operated valve of the present invention opened to the maximum opening degree, and a partially enlarged view thereof.

In the present embodiment, the main difference from the seventh embodiment shown in fig. 13 is that the valve body member 202 is provided with a valve body portion 2021 and a valve body sleeve 2022, and the valve body portion 2021 and the valve body sleeve 2022 are fixedly connected to each other, and in the present embodiment, the valve body portion 2021 includes a third valve body abutment portion 202d, and the valve body sleeve 2022 includes a first valve body abutment portion 202b and a second valve body abutment portion 202 c. The valve body portion 2021 passes through the gasket hole portion 20611, and the second elastic element 204 abuts against the valve body portion 2021.

Of course, the valve body portion 2021 may not pass through the gasket hole portion 20611, and the second elastic element 204 may pass through the gasket hole portion 20611 and abut against the valve body member 202.

Fig. 18 is a sectional view of the electric valve of the twelfth embodiment of the electric valve of the present invention, showing the valve body when the electric valve is opened to the maximum opening degree, and a partially enlarged view thereof. The main difference from the fourth embodiment in fig. 10 is that the structure of the valve body member 202 is changed, specifically, the portion of the valve body sleeve 2022 corresponding to the carrier member 207 is an integral structure, and in this embodiment, the valve body sleeve 2022 includes a first valve body abutment portion 202b, a second valve body abutment portion 202c, and a third valve body abutment portion 202 d.

Of course, in the present embodiment, the abutting member 206 may also be in the form of the abutting bracket 2062, and the valve shaft assembly 201 may also be in the form of the valve shaft main body 2013 and the barrel 2014, and the present embodiment is described in terms of a structure of the valve core member 202, and the valve core member 202 and the other members do not conflict or contradict each other.

Therefore, in the valve core member 202 of the present invention, the valve core main body portion 2021, the valve core sleeve 2022, and the carrier member 207 may all be integrally formed, two of them may be integrally formed, or all of them may be separately formed.

Therefore, the conventional separation, integration and other changes of some parts of the electric valve are performed, but the functions of the geometric corresponding parts of the electric valve after the electric valve is assembled are basically the same, and the electric valve still belongs to the idea of the present invention, for example, the structure of the valve core component 202 in fig. 8 is changed to a certain extent compared with the structure of the valve core component 202 in the first embodiment of fig. 7, but the functions of the geometric corresponding parts of the valve core component 202 are not changed substantially, and the structures which are adaptively changed and combined also fall into the protection scope of the present patent claims.

In the embodiments shown in the present specification, a washer or a shim may be added to the lower end of the second elastic member 204, or a washer or a shim may be added between the first valve body abutting portion 202b and the valve shaft abutting portion 20154, or a washer or a shim may be added to the upper end of the second elastic member 204, or a washer or a shim may be added between the bearing member 207 and the valve body 2023.

In the above embodiment, the top bar 205 is adapted to be able to abut against the housing 30, but it is needless to say that other members may be connected to the housing 30, and the top bar 205 may abut against the members.

In addition, in order to further reduce the friction resistance of the relative rotation between the upper surface and the lower surface of the gasket or the gasket subjected to the rotating friction fit, a coating (such as a coating containing polytetrafluoroethylene, or containing graphite, or containing a molybdenum disulfide component) with a lubricating and wear-resisting function can be sprayed or plated on the surface of the gasket or the lower surface of the gasket, so that the service life of the electric valve is prolonged.

Based on the above embodiments, some adaptive changes in adding the antifriction washers or the shims by using the core structure of the present invention shall fall into the scope of the present invention as claimed in the patent claims.

It should be noted that, in the above-mentioned forming manner of the valve port 10a, whether the connection pipe is provided, and the like, the present solution provides various solutions, and the "may" is used in the specification, so it is understood that "may" of the present application cannot be understood as "must".

It should be noted that, in the present embodiment, the terms of orientation such as up, down, left, right, etc. are used as references in the drawings of the specification and are introduced for convenience of description; and the use of ordinal numbers such as "first," "second," etc., in the component names, are also included for convenience of description and are not intended to imply any limitation on the order in which the components are recited.

The electrically operated valve provided by the present invention has been described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. 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

1. An electric valve, characterized by comprising a valve body comprising a valve seat part (10), a valve core rotor component (20) and a housing (30);

the valve seat member (10) includes a nut (102), and the nut (102) includes an internal threaded portion (10 b); the valve seat part (10) is fixedly connected with the shell (30);

the valve core rotor assembly (20) comprises a valve shaft assembly (201), a valve core component (202), a first elastic piece (208), a second elastic piece (204), an abutting component (206) and a push rod (205);

the valve shaft assembly (201) comprises a valve shaft abutment portion (20154), a male threaded portion (201a) and a spring abutment portion (20a), wherein the male threaded portion (201a) can be in threaded engagement with the female threaded portion (10 b);

the spool member (202) includes a first spool abutment portion (202b), and the first spool abutment portion (202b) is capable of abutting against the valve shaft abutment portion (20154);

the ejector rod (205) comprises an ejector rod main body part (2051) and an ejector rod abutting part (2052), part of the ejector rod main body part (2051) extends out of a through hole at the upper end of the valve shaft assembly (201), and the ejector rod main body part (2051) can abut against the shell (30);

an upper end portion of the first elastic member (208) abuts against the spring abutting portion (20a), the abutting member (206) includes a first abutting portion (206a), a lower end portion of the first elastic member (208) abuts against the first abutting portion (206a), the abutting member (206) includes a second abutting portion (206b), the valve core member (202) includes a second valve core abutting portion (202c), the second abutting portion (206b) is capable of abutting against the second valve core abutting portion (202c), the abutting member (206) includes a third abutting portion (206c), and the third abutting portion (206c) is capable of abutting against the valve shaft assembly (201);

the first elastic piece (208) is externally sleeved on the second elastic piece (204), the upper end portion of the second elastic piece (204) abuts against the ejector rod abutting portion (2052), the ejector rod abutting portion (2052) can abut against the spring abutting portion (20a), the abutting portion (206) comprises an abutting portion hole portion (206d), the valve core member (202) comprises a third valve core abutting portion (202d), and the lower end portion of the second elastic piece (204) abuts against the third valve core abutting portion (202d) through the abutting portion hole portion (206 d).

2. Electrically operated valve according to claim 1, characterized in that the valve seat part (10) comprises a valve port (10a), the valve cartridge (202) comprises a cartridge head part 202a, the electrically operated valve comprising the following operating states: the external thread portion (201a) is in threaded engagement with the internal thread portion (10 b); the spool head (202a) abuts against the valve port (10a), and the first spool abutment (202b) does not abut against the valve shaft abutment (20154); the second contact portion (206b) is in contact with the second spool contact portion (202c), the third contact portion (206c) is not in contact with the valve shaft assembly (201), the push rod contact portion (2052) is in contact with the spring contact portion (20a), and the push rod body portion (2051) is not in contact with the housing (30).

3. Electrically operated valve according to claim 1, characterized by comprising the following operating states: the external thread portion (201a) is in threaded engagement with the internal thread portion (10 b); the spool head portion 202a abuts against the valve port 10a, and the first spool abutment portion (202b) does not abut against the valve shaft abutment portion (20154); the second abutting portion (206b) is in contact with but not abutted against the second spool abutting portion (202c), the third abutting portion (206c) is abutted against the valve shaft assembly (201), the push rod abutting portion (2052) is abutted against the spring abutting portion (20a), and the push rod main body portion (2051) is not abutted against the housing (30).

4. Electrically operated valve according to claim 1, characterized by comprising the following operating states: the external thread portion (201a) is in threaded engagement with the internal thread portion (10 b); the spool head 202a is in contact with but not abutting against the valve port 10a, and the first spool abutting portion (202b) abuts against the valve shaft abutting portion (20154); the second abutting portion (206b) and the second spool abutting portion (202c) do not abut against each other, the third abutting portion (206c) abuts against the valve shaft assembly (201), the push rod abutting portion (2052) abuts against the spring abutting portion (20a), and the push rod main body portion (2051) does not abut against the housing (30).

5. Electrically operated valve according to claim 1, characterized by comprising the following operating states: the external thread portion (201a) is in threaded engagement with the internal thread portion (10 b); the spool head portion 202a does not abut against the valve port 10a, and the first spool abutment portion (202b) abuts against the valve shaft abutment portion (20154); the second abutting portion (206b) and the second spool abutting portion (202c) do not abut against each other, the third abutting portion (206c) abuts against the valve shaft assembly (201), the push rod abutting portion (2052) abuts against the spring abutting portion (20a), and the push rod main body portion (2051) contacts with the housing (30) but does not abut against the housing.

6. Electrically operated valve according to claim 1, characterized by comprising the following operating states: the external thread portion (201a) is not threadedly engaged with the internal thread portion (10 b); the spool head portion 202a does not abut against the valve port 10a, and the first spool abutment portion (202b) abuts against the valve shaft abutment portion (20154); the second abutting portion (206b) and the second spool abutting portion (202c) do not abut against each other, the third abutting portion (206c) abuts against the valve shaft assembly (201), the push rod abutting portion (2052) does not abut against the spring abutting portion (20a), and the push rod main body portion (2051) abuts against the housing (30).

7. The electrically operated valve according to any of claims 1-6, wherein the valve shaft assembly (201) comprises a step (20152), the step (20152) being located above the valve shaft abutment (20154), the step (20152) being abuttable to the third abutment (206 c).

8. The electrically operated valve according to any one of claims 1 to 6, wherein the valve shaft assembly (201) comprises an abutment shelf (2062), the abutment shelf (2062) comprising an abutment shelf top portion (20621), an abutment shelf side portion (20622) and an abutment shelf hole portion (20623) passing through upper and lower surfaces of the abutment shelf top portion (20621);

the lower end of the abutting frame side part (20622) abuts against the valve shaft abutting part (20154), the abutting frame (2062) comprises a third abutting part (206c), the abutting frame top part (20621) abuts against a first elastic piece (208), and the abutting frame (2062) comprises a first abutting part (206 a); the lower end of the second elastic member (204) abuts against the third valve element abutting portion (202d) through an abutting frame hole portion (20623), and the abutting member hole portion (206d) is an abutting frame hole portion (20623).

9. The electrically operated valve according to any one of claims 1 to 6, wherein the valve shaft assembly (201) comprises a valve shaft (2011) and a bushing (2012), the bushing (2012) is fixedly connected to the valve shaft (2011), the bushing (2012) comprises the spring abutment (20a), the bushing (2012) comprises a bushing hole portion (20121), and a portion of the stem main body portion (2051) protrudes from the bushing hole portion (20121).

10. The electrically operated valve according to any one of claims 1 to 6, characterized in that the valve shaft assembly (201) comprises a valve shaft body portion (2013) and a barrel (2014), the valve shaft body portion (2013) and the barrel (2014) are fixedly connected, the barrel (2014) comprises a barrel abutment portion (20141), the barrel abutment portion (20141) comprises the spring abutment portion (20a), a barrel through-hole portion (201411) is provided at a substantially central position of the barrel abutment portion (20141), and a part of the stem main body portion (2051) protrudes from the barrel through-hole portion (201411).