CN115681512A - Electric valve - Google Patents

Abstract

The present invention is directed to an electrically operated valve including a valve seat assembly including a first valve seat member and a second valve seat member, wherein the first valve seat member includes a side wall portion and a top wall portion, the side wall portion and the top wall portion are integrally molded, the top wall portion extends from the side wall portion in a direction toward a center of the electrically operated valve, and the side wall portion is fixedly connected to the second valve seat member. The volume of the valve cavity can be easily increased, so that the pressure stability of the fluid is improved, and the noise of the fluid is reduced.

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 ] A method for producing a semiconductor device

The electric valve is mainly applied to a refrigerating system, the rotation of the rotor is controlled by the electromagnetic coil, and the valve needle is close to or far away from the valve port through the matching of the screw rod and the nut, so that the flow area of the valve port is adjusted, and the flow of refrigerant is adjusted.

The electric valve is usually provided with a valve seat, the connecting pipe is inserted into the valve seat, and the depth of the inserted connecting pipe into the valve seat needs to be controlled well.

[ summary of the invention ]

The object of the present application is to provide an electrically operated valve comprising a valve seat assembly comprising a first valve seat part and a second valve seat part, the first valve seat part comprising a sidewall portion fixedly connected with the second valve seat part;

the valve seat assembly further comprises a first connecting pipe part, the side wall part further comprises a side wall connecting hole part, the first connecting pipe part is inserted into the side wall connecting hole part, and the first connecting pipe part is fixedly connected with the first valve seat part;

the second valve seat component comprises a blocking part, and an overlapping area exists between the orthographic projection of the first connecting pipe part along a plane where the longitudinal section of the electric valve is perpendicular to the direction in which the first connecting pipe part is inserted into the side wall connecting hole part and the orthographic projection of the blocking part along a plane where the longitudinal section of the electric valve is perpendicular to the direction in which the first connecting pipe part is inserted into the side wall connecting hole part.

The electric valve of the application, the depth that first takeover portion cartridge got into in the first valve seat part is relatively easy to control.

[ description of the drawings ]

Figure 1 is a cross-sectional view of an electrically operated valve of the present invention;

figure 2 is a schematic structural view of an electric valve seat component of the invention;

figure 3 is a schematic structural view of the rotor part of the spool of the electrically operated valve of the present invention, and an enlarged partial cross-sectional view thereof;

figure 4 is a cross-sectional view of the valve body of the valve cartridge rotor component of the electrically operated valve of the present invention about to over open the critical point;

FIG. 5 is a cross-sectional view of the valve body when the valve core rotor part of the electrically operated valve of the invention excessively opens the thread pair and disengages the thread;

figure 6 is a schematic diagram of a second embodiment of a cartridge rotor component according to the present invention;

figure 7 is a schematic diagram of a third embodiment of a spool rotor component of the present invention;

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

figure 9 is a schematic diagram of a fifth embodiment of a spool rotor component of the present invention;

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

figure 11 is a schematic diagram of a seventh embodiment of the cartridge rotor assembly of the present invention;

fig. 12 is a partial structural schematic view of a plug rotor assembly according to an eighth embodiment of the present invention;

FIG. 13 is a cross-sectional view of a seat assembly for a ninth embodiment of the present invention;

wherein fig. 1-13 include the following reference numerals:

10a valve seat assembly; 101 a first valve seat member; 1011 side wall portion; 10111 sidewall connection hole portions; 10112 a first step; 101121 a first step cross; 101122 a first step longitudinal portion; 10113 a second step; 101131 second step cross section; 101132 a second stepped longitudinal portion; 1012 a top wall portion; 1013 fitting hole parts; 1014 balancing the hole parts; 102a second valve seat member; 1021 an insertion section; 1022 a restricting part; 1023 a mating connection; 1024 a blocking part; 1025 a valve seat connection; 102a second valve seat body portion; 103 a first pipe connecting portion; 104 a second pipe connecting part; 10a valve mouth part; 10b a valve cavity; 10d first access way; 10e a second access passage; 20 a spool rotor assembly; 201a valve shaft assembly; 2011 the valve shaft; 2012 a bushing; 20121 a bushing hole portion; 20122 a bushing extension; 2013 a valve shaft body; 2014 barrel; 20141 a barrel abutment; 201411 a barrel through hole portion; 2015 valve shaft inner wall portion; 20151 a first valve shaft inner wall portion; 20152, a valve shaft abutment; 20153 a second valve shaft inner wall portion; 2016 an outer edge portion; 20161 a first outer edge portion; 20162 a second peripheral portion; 201a externally threaded portion; 201b a movable stopper; 201c a rotor fixing part; 202a valve core; 2021 a valve body portion; 2022 valve core case; 20221 a spool socket portion; 202a valve element head; 202b a spool abutment; 203 a rotor; 204 an elastic member; 205 a top rod; 2051 a top rod main body part; 2052 ejector pin abutting part; 206 a gasket; 2061 washer hole portions; 207 a spacer; 209 an upper gasket; 2091 an upper grommet hole portion; 20b an abutment; 20c a channel portion; 20d a bearing part; 30 a housing; 40a nut assembly; 401 a nut body portion; 402 a nut connection portion; 40a fixing stopper; 40b an internal threaded portion; 50 coils.

[ detailed description ] embodiments

In order to make the technical solutions of the present invention better understood, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

Please refer to fig. 1 to 5, wherein fig. 1 is a cross-sectional view of an electric valve according to the present invention; figure 2 is a schematic diagram of the construction of the electric valve seat assembly 10 of the present invention; FIG. 3 is a schematic structural view of a valve core rotor assembly of an electrically operated valve of the present invention and an enlarged partial cross-sectional view thereof; figure 4 is a cross-sectional view of the valve body immediately before the critical point is opened excessively by the spool rotor assembly of the electrically operated valve of the present invention; FIG. 5 is a cross-sectional view of the valve body when the rotor assembly of the electric valve core of the invention excessively opens the thread pair to disengage the thread;

referring to fig. 1 and fig. 2, in an embodiment, the electric valve provided by the present invention includes a valve body and a coil 50, wherein the coil 50 is sleeved on the valve body. The valve body includes a valve seat assembly 10, a plug rotor assembly 20, a housing 30, and a nut assembly 40. The stator coil 50 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 50, and the coil 50 generates a changing magnetic field, so that the valve core rotor assembly 20 of the electric valve is driven to rotate forwards or reversely. 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, the nut assembly 40 includes a nut body portion 401, an internal thread portion 40b is provided at an inner hole portion of the nut body portion 401, the valve shaft 2011 is in threaded fit (hereinafter referred to as threaded connection) with the nut body portion 401, and when the valve core rotor assembly 20 rotates, the valve shaft 2011 can displace along an axial direction, so as to drive the valve core 202 to approach or leave the valve port portion 10a.

In the present embodiment, the valve seat assembly 10 includes the first valve seat member 101 and the second valve seat member 102, the first valve seat member 101 includes a side wall portion 1011 and a top wall portion 1012, the side wall portion 1011 is substantially hollow and cylindrical, the second valve seat member 102 is located at one end of the first valve seat member 101, and the top wall portion 1012 extends from the side wall portion 1011 toward the center of the electric valve. The lower end opening side of the side wall portion 1011 is fixedly connected to the second valve seat member 102.

Specifically, in the present embodiment, the second valve seat member 102 includes the insertion portion 1021 and the restriction portion 1022, the insertion portion 1021 is substantially vertical, the restriction portion 1022 is substantially horizontal, the restriction portion 1022 is located at the outer side of the insertion portion 1021 in the circumferential direction, when the first valve seat member 101 and the second valve seat member 102 are assembled and fixed, the insertion portion 1021 can be first inserted from the opening side of the first valve seat member 101, so that the insertion portion 1021 is fitted to the inner surface of the side wall portion 1011, at this time, an orthogonal projection of the insertion portion 1021 along a plane where a longitudinal cross section of the electric valve is located and an orthogonal projection of the side wall portion 1011 along the plane exist an overlapping region, and during the process of inserting the insertion portion 1021 into the side wall portion 1011, the side wall portion 1011 can provide a certain guide for the insertion portion 1021, thereby ensuring the coaxiality of the axis of the first valve seat member 101 and the axis of the second valve seat member 102. Further, there is an overlapping area between an orthogonal projection of the side wall portion 1011 along a plane in which a cross section of the electric valve is located and an orthogonal projection of the regulating portion 1022 along the plane, and when the insertion portion 1021 is fitted into the side wall portion 1011 to a certain extent, the regulating portion 1022 can abut against an opening end portion of the side wall portion 1011 to regulate the insertion portion 1021 from being further fitted into the side wall portion 1011, thereby regulating the relative positions of the first valve seat member 101 and the second valve seat member 102 in the axial direction, and then the first valve seat member 101 and the second valve seat member 102 are fixedly connected by, for example, welding.

In addition, in the present embodiment, the second valve seat member 102 has a valve port portion 10a, the valve seat assembly 10 further includes a first inlet/outlet passage 10d and a second inlet/outlet passage 10e, the valve port portion 10a can communicate 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 through, the side wall portion 1011 has a side wall connection hole portion 10111, the first connecting pipe portion 103 and the side wall connection hole portion 10111 are fixedly connected by welding or the like, the second valve seat member 102 has a mating connection portion 1023, the mating connection portion 1023 is fixedly connected with the second connecting pipe portion 104, and the second connecting pipe portion 104 is communicated with the valve port portion 10a (without considering the valve core 202), the first connecting pipe portion 103 and the second connecting pipe portion 104 are generally used as an inlet/outlet passage of the fluid medium when the valve core is installed in a refrigeration/heating system such as an air conditioner, and are connected with system pipelines.

Through the arrangement, the valve cavity 10b is formed in the valve seat assembly 10, and compared with a valve seat machined by a bar material in the background art, the volume of the valve cavity 10b can be easily increased, so that the pressure stability of fluid is improved, and the noise of the fluid is reduced.

Referring to fig. 2, referring to fig. 1, in the present embodiment, the valve seat assembly 10 further includes a fitting hole portion 1013, the fitting hole portion 1013 penetrates through upper and lower surfaces of the top wall portion 1012, the nut body portion 401 includes an outer edge section 4011, when the nut assembly 40 is assembled with the valve seat assembly 10, the outer edge section 4011 of the nut body portion 401 can be inserted into the fitting hole portion 1013, at this time, the nut assembly 40 is inserted into the fitting hole portion 1013, the nut assembly 40 can be guided by the fitting hole portion 1013 when being installed in the valve seat assembly, the axis of the nut assembly 40 and the axis of the valve seat assembly 10 are coaxial, and when the subsequent valve element 202 is close to or far away from the valve port 10a, the degree of deflection of the valve element 202 relative to the axis of the electric valve is relatively small.

The nut body 401 and the fitting hole portion 1013 may be in an interference fit, an over fit or a clearance fit, in this embodiment, the nut body 401 and the fitting hole portion 1013 are in an interference fit, and when the nut body 401 and the fitting hole portion 1013 are in a clearance fit, the single clearance between the outer edge segment 4011 of the nut body 401 and the fitting hole portion 1013 is preferably controlled within 0.15 mm.

With continued reference to fig. 1, in the present embodiment, the nut assembly 40 further includes a nut connecting portion 402, the nut connecting portion 402 is made of a metal material, the nut connecting portion 402 is integrally injection-molded with the nut body portion 401 as an insert, and the nut connecting portion 402 and the top wall portion 1012 can be fixedly connected by welding or gluing.

Specifically, in the plane of the cross section of the electric valve, there is an overlapping area between the orthographic projection of the nut connecting portion 402 along the plane and the orthographic projection of the top wall portion 1012 along the plane, so that when the nut body portion 401 is fitted into the fitting hole portion 1013 to a certain extent, the nut connecting portion 402 and the top wall portion 1012 can abut against each other, the nut body portion 401 is restricted from being further fitted into the fitting hole portion 1013, the relative position of the nut assembly 40 and the valve seat assembly 10 in the axial direction can be defined, and then the nut connecting portion 402 and the top wall portion 1012 are fixed, and the assembly of the nut assembly 40 and the valve seat assembly 10 is completed.

In the present embodiment, the lower surface of the nut coupling portion 402 is flat, and the upper surface of the top wall portion 1012 is also flat, so that when the nut member 40 is assembled and fixed to the valve seat member 10, the lower surface of the nut coupling portion 402 is engaged with the upper surface of the top wall portion 1012 and then fixed, and the axis of the nut member 40 is perpendicular to the horizontal direction, and the nut member 40 is not easily deviated from the axis direction of the valve seat member 10, and at the same time, when the nut body portion 401 is fitted into the engaging hole portion 1013 at the outer edge section 4011 thereof, the engaging hole portion 1013 also serves to increase the perpendicularity between the axis of the nut member 40 and the horizontal direction, and therefore, the coaxiality between the axis of the nut member 40 and the axis of the valve seat member 10 is good in the present embodiment.

Referring to fig. 2, in combination with fig. 1, the electric valve of the present application further includes an outer casing 30, the outer casing 30 is a thin-walled member and is in a shape of a housing, and a lower opening side of the outer casing 30 is hermetically welded to the valve seat assembly 10, so as to form a receiving chamber capable of receiving an upper half portion of the nut body 401 and a main body portion of the plug rotor assembly 20. Specifically, in the present embodiment, the side wall portion 1011 further includes a first stepped portion 10112, the first stepped portion 10112 is located substantially on the circumferential outer side of the side wall portion 1011 and is in an annular step shape, the first stepped portion 10112 includes a first stepped transverse portion 101121 and a first stepped longitudinal portion 101122, the first stepped transverse portion 101121 is a portion of the first stepped portion 10112 that is relatively more oriented in the horizontal direction, the first stepped longitudinal portion 101122 is a portion of the first stepped portion 10112 that is relatively more oriented in the vertical direction, in the present embodiment, the first stepped transverse portion 101121 is in the horizontal shape, and the first stepped longitudinal portion 101122 is in the vertical shape.

When the valve seat assembly 10 is assembled with the housing 30, the housing 30 is gradually sleeved along the first step longitudinal portion 101122, in the process that the housing 30 is gradually sleeved along the first step longitudinal portion 101122, the first step longitudinal portion 101122 can play a certain guiding role on the housing 30, so that the axis of the housing 30 is not prone to generate deflection relative to the axis of the valve seat assembly 10, the coaxiality between the axis of the valve seat assembly 10 and the axis of the housing 30 is good, in addition, an orthographic projection of the housing 30 along a plane where a cross section of the electric valve is located and an orthographic projection of the first step transverse portion 101121 along the plane have an overlapping region, so that when the opening end portion of the housing 30 is gradually sleeved to a certain degree along the first step longitudinal portion 101122, the opening end portion of the housing 30 can abut against the first step transverse portion 101121, so as to limit the further sleeving of the housing 30, and thus the relative position of the housing 30 and the valve seat assembly 10 in the axial direction can be limited, in this embodiment, the first step transverse portion 101121 is horizontal, the opening side of the housing 30 is also horizontal, and after the two are matched, the housing 30 is easy to generate the axial deviation relative to be beneficial to generate the coaxial axis of the valve seat assembly 10, so as to ensure the axial direction of the housing 30.

In this way, the electric valve substantially forms two chambers, namely, a housing chamber located above the nut connecting portion 402 and a valve chamber 10b located below the nut connecting portion 402.

In the present embodiment, the valve seat assembly 10 further includes balance hole portions 1014, the balance hole portions 1014 penetrating the upper and lower surfaces of the top wall portion 1012.

With the above arrangement, the pressure of the accommodation chamber and the pressure of the valve chamber 10b can be balanced faster by the balance hole portion 1014, and noise due to imbalance between the pressures of the accommodation chamber and the valve chamber 10b or slower balancing time can be reduced.

It should be noted that the balance hole portion 1014 of the present application is used as a way of balancing the pressure of the receiving chamber and the pressure of the valve chamber 10b, and the balance hole portion 1014 of the present application is not limited to be the only balance passage, and the balance hole portion 1014 may be used as one of the balance passages in the electric valve.

Both the equilibrium hole section 1014 and the fitting hole section 1013 penetrate the upper and lower surfaces of the top wall section 1012, and therefore, the equilibrium hole section 1014 and the fitting hole section 1013 may be provided so as not to overlap, or a part of the equilibrium hole section 1014 and a part of the fitting hole section 1013 overlap, and of course, when the number of the equilibrium hole sections 1014 is set to 2 or more, a part of the equilibrium hole section 1014 and the fitting hole section 1013 may not overlap, or a part of the equilibrium hole section 1014 and a part of the fitting hole section 1013 overlap, where the overlap is: balance bore section 1014 and mating bore section 1013 are one bore that are ganged together.

In addition, in this embodiment, the second valve seat member 102 further includes a second valve seat main body portion 102a and a blocking portion 1024, in this embodiment, the blocking portion 1024 is substantially in an annular structure, and is substantially in a structure formed by extending axially along an upper surface of the second valve seat main body portion 102a, when the first connecting pipe portion 103 and the first valve seat member 101 are mounted, the first valve seat member 101 and the second valve seat member 102 may be fixedly connected, and then the first connecting pipe portion 103 may be inserted into the side wall connecting hole portion 10111, and when the first connecting pipe portion 103 enters the side wall connecting hole portion 10111 to a certain extent, the blocking portion 1024 may abut against the first connecting pipe portion 103 to limit the first connecting pipe portion from further entering the side wall connecting hole portion 10111, so that the blocking portion 1024 can control an insertion depth of the first connecting pipe portion 103, and the first connecting pipe portion 103 of each product is inserted into the side wall connecting hole portion 10111 with good consistency.

Specifically, the direction in which the first pipe receiving portion 103 is inserted into the sidewall connecting hole portion 10111 may be an insertion direction X, a plane perpendicular to the insertion direction X may exist, and an orthogonal projection of the stopper 1024 along the plane may overlap an orthogonal projection of the first pipe receiving portion 103 along the plane.

At this time, when the first stub pipe portion 103 enters the sidewall connection hole portion 10111 to a certain extent, the stopper 1024 can abut against the first stub pipe portion 103 to control the insertion depth of the first stub pipe portion 103.

Referring to fig. 3, the valve core rotor assembly 20 further includes a rotor 203 and a valve core 202, the rotor 203 has magnetic poles in a circumferential direction, the valve core 202 is inserted into a central through hole of the valve shaft 2011, in addition, the valve core rotor assembly 20 further includes an elastic member 204 disposed in the central through hole of the valve shaft 2011, and a push rod 205 disposed at an upper end of the elastic member 204, the valve shaft assembly 201 further includes a bushing 2012 fixedly connected to an upper end of the valve shaft 2011, and in this embodiment, the elastic member 204 is a spring.

Referring to fig. 1 and 3, the nut body 401 protrudes from the annular base body and is provided with a fixed stop portion 40a, which can cooperate with a movable stop portion 201b provided on the valve core rotor assembly 20, so as to form 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 assembly 10 to a certain extent, the movable stop portion 201b can abut against the fixed stop portion 40a, so as to limit further rotation of the valve core rotor assembly 20 relative to the valve seat assembly 10, thereby limiting the valve core rotor assembly 20 from continuing to move downward in the axial direction, and thus controlling the stroke of the downward movement of the valve core rotor assembly 20.

When the coil 40 of the electric valve receives a magnetic field that changes due to a driving pulse signal, the rotor 203 in the valve body is excited to rotate, and in this embodiment, the valve shaft 2011 is fixedly connected to the rotor 203, so that the valve shaft 2011 rotates synchronously with the rotor 203, and the screw feed mechanisms of the valve shaft 2011 and the nut body 401 can convert the rotational motion of the rotor 203 into axial movement, so as to drive the valve core 202 to make the valve core head 202a approach or separate from the valve port 10a, thereby implementing a linear on-off regulation function of the electric valve flow.

The valve core rotor assembly 20 of the electric valve comprises a rotor 203 with magnetic poles in the circumferential direction, a valve shaft 2011 fixedly connected with the rotor 203, a valve core 202 inserted into a central through hole of the valve shaft 2011, an elastic element 204 arranged in a cavity of the inner hole of the valve shaft 2011, an ejector rod 205 arranged at the upper end of the elastic element 204, and a bushing 2012 fixedly connected with the upper end of the valve shaft 2011.

The electric valve of the present application sets up elastic component 204 in the bore cavity of valve shaft 2011, and valve shaft 2011 has all carried out the restraint to its circumferencial direction and upper and lower direction, and elastic component 204 can not take place the drunkenness from top to bottom basically, consequently can not produce the drunkenness noise basically, also can avoid elastic component 204 to appear falling the inefficacy risk of aversion.

Referring to fig. 3, in this embodiment, the valve shaft 2011 includes a hole penetrating up and down, an inner wall of the through hole approximately forms a valve shaft inner wall portion 2015, and in an axial direction of the valve shaft 2011, inner diameters of the valve shaft inner wall portions 2015 are not the same, specifically, 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 in a plane where a cross section of the valve shaft 2011 is located, a front projection of the first valve shaft inner wall portion 20151 along the plane (the front projection is a closed line or a ring surface) is located outside a front projection of the second valve shaft inner wall portion 20153 along the plane (the front projection is a closed line or a ring surface), generally, for convenience of manufacturing, 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, and a diameter of the first valve shaft inner wall portion 2015 is greater than a circular cross section of the first valve shaft inner wall portion 2015 along the first valve shaft inner wall portion 2015 and a circular cross section of the second valve shaft inner wall portion 2015, so that the first valve shaft inner wall portion 2015 is located in the axial direction of the first valve shaft inner wall portion 2015 and the first valve shaft inner wall portion 2015.

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, the inner edge of the valve shaft abutting portion 20152 intersects with the second valve shaft inner wall portion 20153, and 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 shape.

Referring to fig. 3, in this embodiment, the valve shaft 2011 includes the outer edge portion 2016, the outer edge portion 2016 includes the first outer edge portion 20161 and the second outer edge portion 20162, the first outer edge portion 20161 is located above the second outer edge portion 20162, a cross-section of the valve shaft 2011 in a plane in which an orthographic projection of the first outer edge portion 20161 along the plane is located outside an orthographic projection of the second outer edge portion 20162 along the plane, for convenience of processing, cross-sections of the first outer edge portion 20161 and the second outer edge portion 20162 are both set to be circular, a portion of the valve shaft 2011 where the first outer edge portion 20161 is located is provided with the rotor fixing portion 201c, the rotor 203 and the rotor fixing portion 201c may be fixed by direct or indirect welding, riveting, injection molding of a magnetic plastic material, gluing, and the like, in this embodiment, the connection piece is injection molded with the magnetic plastic material as an insert, and then the valve shaft 2011 and the connection piece are fixedly connected by welding, and when the rotor 203 and the valve shaft 2011 are directly connected, the insert may also be molded with the magnetic plastic material 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 and the female thread portion 40b provided at the inner hole portion of the nut body portion 401 are combined to constitute a screw feeding mechanism (screw pair) of the electric valve.

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

With continued reference to fig. 3, in this embodiment, the valve core 202 is inserted into the valve shaft 2011 (a portion of the valve core 202 is located in the inner wall 2015 of the valve shaft), in addition, the valve core 202 is in a stepped shaft shape and includes a valve core head 202a, the valve core head 202a is located at a substantially lower end position of the valve core 202, a tip end shape of the valve core head 202a is related to a flow rate regulation curve required by the electric valve, the valve core 202 further includes a valve core abutment portion 202b, the valve core abutment portion 202b is located at a substantially upper end position of the valve core 202, in a plane where a cross section of the valve core 202 is located, an orthogonal projection of the valve core head 202a along the plane is located in an orthogonal projection of the valve core abutment portion 202b along the plane, in this embodiment, the cross sections of the valve core head 202a and the valve core abutment portion 202b are both circular, and therefore a diameter of the valve core abutment portion 202b is greater than a diameter of the valve core head 202 a. In the present embodiment, the valve body 202 is inserted into the inner cavity of the valve shaft 2011 from the top downward, the valve body contact portion 202b can be brought into contact with the valve shaft contact portion 20152, and the valve body head portion 202a protrudes from the second valve shaft inner wall portion 20153. In the plane where the cross section of the spool 202 is located, since there is an overlapping region between the orthographic projection of the spool abutment portion 202b along the plane and the orthographic projection of the valve shaft abutment portion 20152 along the plane, the spool abutment portion 202b can abut against the valve shaft abutment portion 20152 (of course, when a member such as a washer is provided between the valve shaft abutment portion 20152 and the spool abutment portion 202b so that it does not directly abut against it, the relationship between the projections of the spool abutment portion 202b and the valve shaft abutment portion 20152 may not be satisfied).

In addition, the valve core rotor assembly 20 of the electric valve of the present embodiment further includes an elastic member 204, the elastic member 204 may be designed as a cylindrical coil spring, and the elastic member 204 is located in the first valve shaft inner wall portion 20151.

With continued reference to fig. 3, the spool rotor assembly 20 of the electric valve further includes a ram 205, the ram 205 includes a ram main body portion 2051 and a ram abutting portion 2052, in this embodiment, the ram abutting portion 2052 is a structure formed by circumferential extension of the ram main body portion 2051, the ram abutting portion 2052 is located below the bushing 2012, the ram main body portion 2051 penetrates out of the bushing hole portion 20121 to the valve shaft assembly 201, a lower end portion of the elastic element 204 abuts against the spool 202, and an upper end portion of the elastic element 204 abuts against the ram abutting portion 2052 of the ram 205.

With continued reference to fig. 3, in the plane of the cross section of the core rotor assembly 20, there is an overlapping area between the orthographic projection of the bushing hole portion 20121 along the plane and the orthographic projection of the jack rod abutting portion 2052 along the plane, and the orthographic projection of the jack rod main body portion 2051 along the plane is located in the orthographic projection of the bushing hole portion 20121 along the plane, so the jack rod abutting portion 2052 cannot pass through the bushing hole portion 20121 from bottom to top, and the jack rod main body portion 2051 can pass through the bushing hole portion 20121 (of course, when a gasket or the like is provided between the bushing 2012 and the jack rod abutting portion 2052 so that they do not abut directly, the projected relationship between the bushing hole portion 20121 and the jack rod abutting portion 2052 may not satisfy the above). The upper end of the ram main body portion 2051 passes through the bushing hole portion 20121, the ram abutting portion 2052 receives an upward elastic pressing force of the elastic member 204, and the ram abutting portion 2052 abuts against the bushing 2012 (including direct abutment or indirect abutment, for example, when a washer or the like is provided between the bushing 2012 and the ram abutting portion 2052, the ram abutting portion 2052 abuts against the bushing 2012 indirectly). After the bushing 2012 is fixedly connected to the valve shaft 2011, the elastic member 204 is compressed.

The valve shaft assembly 201 provided by the present application includes an abutting portion 20b, the abutting portion 20b abuts against the push rod abutting portion 2052, in this embodiment, the bushing 2012 abuts against the push rod abutting portion 2052, and therefore, the bushing 2012 includes the abutting portion 20b.

Fig. 4 is a cross-sectional view of the valve body of the electric valve core rotor component 20 of the present invention when the critical point is about to be opened excessively. The core rotor assembly 20 of fig. 4 is in an almost over-open state (over-open: a state in which the core rotor assembly 20 is opened upward beyond its prescribed upper limit stroke). The valve plug head 202a is shown in fig. 4 as being away from the valve port 10a, and the external threaded portion 201a of the valve shaft 2011 has a length (indicated by L in the figure) that remains in threaded engagement with the internal threaded portion 40b of the nut body 401, and the stem body portion 2051 just contacts the top of the housing 30.

Fig. 5 is a sectional view of the valve body when the valve core rotor assembly of the electric valve of the invention is opened excessively (the thread pair is unscrewed). The stroke height of the valve core rotor assembly 20 in fig. 5 that continues to move upward relative to the position shown in fig. 4 is L, at this time, the movable threaded portion 201a of the valve shaft 2011 is just unscrewed from the fixed threaded portion 10b of the nut body portion 401, the compression amount by which the elastic member 204 is further compressed relative to the state in fig. 4 is L, the top end of the ejector rod main body portion 2051 of the ejector rod 205 abuts against the inner wall of the housing 30, and the downward elastic force of the elastic member 204 is finally transmitted to the valve shaft assembly 201, that is, the valve shaft assembly 201 is subjected to the downward elastic load of the elastic member 204. If the core rotor assembly 20 continues to rotate in the direction of excessive opening, at this time, because the thread pairs are unscrewed, the core rotor assembly 20 will not continue to rise relative to the nut body 401; when the spool rotor assembly 20 is rotated downward in the valve closing direction by the driving force of the coil 40, the male screw portion 201a and the female screw portion 40b are again screwed together because the valve shaft 2011 receives the pressing force of the elastic member 204 downward, and the spool rotor assembly 20 is rotated and moved downward.

The valve shaft assembly 201 provided by the present application includes a channel portion 20c, the electric valve provided by the present embodiment includes a bearing portion 20d, the channel portion 20c can allow the spindle body portion 2051 of the spindle 205 to penetrate out of the valve shaft assembly 201, so that the spindle body portion 2051 can abut against the bearing portion 20d, in the present embodiment, the spindle body portion 2051 can penetrate out of the bushing hole portion 20121 and abut against the housing 30, therefore, in the present embodiment, the bushing hole portion 20121 includes the channel portion 20c, and the housing 30 includes the bearing portion 20d.

Fig. 6 is a schematic structural view of a core rotor assembly according to a second embodiment of the present invention. Compared with the valve core rotor assembly 20 of the first embodiment shown in fig. 3, the present embodiment is equivalent to the split design of the valve core 202 of the first embodiment. The valve core 202 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.

With the spool 202 of the present embodiment, the diameter of the spool head portion 202a can be set larger than the diameter of the second spool inner wall portion 20153. When the diameter of the valve core head 202a is larger than the diameter of the second valve shaft inner wall 20153, the valve core 202 is inserted into the central through hole of the valve shaft 2011 from bottom to top, the valve core sleeve 2022 is sleeved from top to bottom and fixed with the valve core main body portion 2021, the elastic element 204 abuts against the valve core sleeve 2022, in this embodiment, the valve core sleeve 2022 includes a valve core abutting portion 202b, and the valve core abutting portion 202b can abut against the valve shaft abutting portion 20152. The lower end of the elastic member 204 in this example abuts against the upper part of the spool case 2022.

In addition, in the present embodiment, the valve body portion 2021 protrudes from the valve core housing portion 20221 and is located inside the elastic element 204, and when the lower end of the elastic element 204 is about to be radially displaced, the radial displacement of the elastic element 204 can be limited by the portion of the valve core body portion 2021 protruding from the valve core housing portion 20221, and the elastic element 204 is more stable during the operation of the electric valve. The other parts of the present embodiment have the same or similar structural schemes as the first embodiment.

Of course, the valve core sleeve portion 20221 may also be in the form of a blind hole, that is, the valve core main body portion 2021 is fixedly connected to the valve core sleeve 2022, but the valve core main body portion 2021 does not pass through the valve core sleeve portion 20221, that is, the valve core sleeve portion 20221 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.

Fig. 7 is a schematic structural view of a third embodiment of a core rotor assembly according to the present invention. This embodiment is different from the second embodiment in fig. 6 mainly in that a washer 206 is additionally provided between the upper end of the valve core case 2022 and the lower end of the elastic member 204, the washer 206 includes a washer hole portion 2061, and the washer hole portion 2061 penetrates the upper and lower surfaces of the washer 206. The addition of the washer 206 reduces the frictional resistance of the valve element 202 against the relative rotational movement of the elastic member 204, thereby improving the operational reliability and operational life of the electric valve. In this embodiment, the lower end of the elastic element 204 abuts against the upper end face of the gasket 206, and the other parts of this embodiment have the same or similar structural schemes as the second embodiment.

Fig. 8 is a schematic structural view of a core rotor assembly according to a fourth embodiment of the present invention. The present embodiment differs from the third embodiment shown in fig. 7 mainly in that the position of the washer 206 is changed, the washer 206 is located between the valve shaft contact portion 20152 and the valve body contact portion 202b, the washer 206 is also provided with a washer hole portion 2061, the valve body contact portion 202b abuts against the washer 206, and the lower end of the elastic member 204 abuts against the valve body 202. The addition of the washer 206 can reduce the frictional resistance of the valve body 202 to the valve shaft 2011 in the relative rotational movement, thereby improving the operational reliability and operational life of the electric valve. The structure of other parts of this embodiment is the same as or similar to that of the third embodiment.

In this embodiment, it is emphasized that the term "abut" in this application includes both that two components abut directly, and that two components abut each other through other components.

Fig. 9 is a schematic structural view of a core rotor assembly according to a fifth embodiment of the present invention. The main difference between this embodiment and the core rotor assembly 20 of the first embodiment shown in fig. 3 is that the bushing 2012 is slightly different in configuration. In this embodiment, the bushing 2012 covers the valve shaft 2011, and the bushing 2012 is fixedly connected to the valve shaft 2011.

The bushing 2012 of this embodiment further includes a bushing extension 20122 formed by extending downward along a circumferential outer edge thereof, in this embodiment, the bushing 2012 is substantially shaped like a casing, and the bushing extension 20122 of the bushing 2012 is fixed to the circumferential outer side of the valve shaft 2011 in a sleeving manner. The structure of the other parts of this embodiment is the same as or similar to that of the first embodiment, and in this embodiment, the bushing 2012 is not located inside the inner wall 2015 of the valve shaft.

Fig. 10 is a schematic structural view of a core rotor assembly according to a sixth embodiment of the present invention. This embodiment differs from the first embodiment of fig. 3 mainly in that a spacer 207 is additionally provided between the upper end of the spool 202 and the lower end of the elastic member 204. The gasket 207 can reduce the friction resistance of the valve core 202 relative to the elastic element 204, so as to reduce the situation that the valve core 202 rotates along with the valve shaft assembly 201, reduce the friction between the valve core head 202a and the valve port 10a, reduce the abrasion of the valve port 10a and the valve core head 202a, and improve the operation reliability and the operation life of the electric valve. In this embodiment, the lower end of the elastic element 204 abuts against the pad 207, and the structural scheme of other parts of this embodiment may be the same as or similar to that of the first embodiment.

Fig. 11 is a schematic view of a rotor 203 according to a seventh embodiment of the present invention.

Compared with the first embodiment in fig. 3, the present embodiment is equivalent to the first embodiment in which the structure of the valve shaft assembly 201 is re-divided and integrated. In the present embodiment, the valve shaft assembly 201 includes the valve shaft main body portion 2013 and the tubular member 2014, the valve shaft main body portion 2013 has a through hole penetrating vertically, the valve shaft main body portion 2013 is provided with the male screw portion 201a, the valve shaft main body portion 2013 is fixedly connected to the tubular member 2014, and a substantially inner wall portion 1011 of the valve shaft main body portion 2013 fixedly connected to the tubular member 2014 forms a valve shaft inner wall portion 2015, in the present embodiment, a portion of the valve shaft main body portion 2013 is located in the through hole of the tubular member 2014, but of course, the valve shaft main body portion 2013 may be fixed to the lower end of the tubular member 2014 without entering the through hole of the tubular member 2014. The cylindrical member 2014 is roughly hollow and cylindrical, the cylindrical member 2014 is roughly provided with a cylindrical member abutting part 20141 above, a cylindrical member through hole 201411 is roughly arranged in the middle of the cylindrical member abutting part 20141, the plane of the cross section of the valve shaft assembly 201 is the plane, the orthographic projection of the cylindrical member through hole 201411 along the plane is positioned outside the orthographic projection of the ejector rod main body part 2051 along the plane, and is positioned in the orthographic projection of the ejector rod abutting part 2052 along the plane, in the embodiment, the cylindrical member through hole 201411, the outer edge of the ejector rod main body part 2051 and the outer edge of the ejector rod abutting part 2052 are all circular, and the diameter of the cylindrical member through hole 201411 is larger than that of the ejector rod main body part 2051 and is smaller than that of the ejector rod abutting part 2052.

The valve body abutting portion 202b can abut against the upper end surface of the valve shaft main body portion 2013, at this time, the upper end surface of the valve shaft main body portion 2013 forms a valve shaft abutting portion 20152, a side hole wall of the valve shaft assembly 201 located on the valve shaft abutting portion 20152 forms a first valve shaft inner wall portion 20151, a side hole wall located below the valve shaft abutting portion 20152 forms a second valve shaft inner wall portion 20152, the elastic member 204 is accommodated in a space defined by the cylindrical member 2014 and the valve shaft main body portion 2013, the cylindrical member abutting portion 20141 can abut against the ejector abutting portion 2052, so the cylindrical member abutting portion 20141 includes an abutting portion 20b, the ejector main body portion 2051 of the ejector 205 protrudes upward from the cylindrical member through hole 201411 and can abut against the bearing portion 20d, and therefore the cylindrical member through hole 201411 includes a passage portion 20c.

The barrel 2014 may be formed integrally or may be formed by fastening two or more parts together.

Compared with the first embodiment shown in fig. 3, the present embodiment is equivalent to the first embodiment in that the structure of the valve shaft assembly 201 is re-divided, integrated and changed, and the geometric corresponding parts after assembly have the same functions. The other parts of the present embodiment have the same or similar structural schemes as the first embodiment.

Fig. 12 is a partial structural schematic view of a plug rotor assembly according to an eighth embodiment of the present invention.

Compared with the first embodiment in fig. 3, the present embodiment is mainly different in that an upper washer 209 is additionally provided below a bushing 2012, the upper washer is provided with an upper washer hole portion 2091, the upper washer hole portion 2091 penetrates through upper and lower surfaces of the upper washer 209, an upper end surface of the upper washer 209 abuts against the bushing 2012, a lower end of the upper washer 209 abuts against a ram abutting portion 2052, the ram body portion 2051 penetrates out of a bushing hole portion 20121, in the present embodiment, the bushing hole portion 20121 includes a passage portion 20c, and the upper washer 209 abuts against the ram abutting portion 2052.

Since the above is merely a different mating relationship of the valve shaft assembly 201 with the addition of the washer 209 in a different configuration, the general concepts do not depart from the scope of this patent. The offsetting comprises direct offsetting and indirect offsetting.

The present embodiment intends to explain that some parts of the electric valve can be separated, integrated and the like in a conventional manner, but the functions of the geometric corresponding parts of the electric valve after being assembled are basically the same, and the electric valve still belongs to the concept of the present invention.

In the above embodiment, the top rod 205 is adapted to be able to abut against the housing 30, and in this case, the housing 30 includes the bearing portion 20d, but of course, a connector of the housing 30 may be welded to the housing 30, and the top rod 205 abuts against the connector of the housing 30, and in this case, the bearing portion 20d is a member abutting against the top rod 205. That is, the receiving portion 20d of the present invention is a member that can abut against the rod 205, and is not limited to the case 30.

Based on the above embodiments, some adaptive changes in adding wear-reducing washers or shims by using the core structure of the present invention should fall into the scope of the present invention.

Referring to FIG. 13, FIG. 13 is a cross-sectional view of a seat assembly for a ninth embodiment of the present invention.

In this embodiment, the structure of the valve seat assembly 10 is changed from that of the first embodiment shown in fig. 1 and 2, in this embodiment, the blocking portion 1024 is not a ring structure, and the blocking portion 1024 is a substantially convex block structure, so that when the first joint pipe portion 103 is inserted into the sidewall joint hole portion 10111 to a certain extent, the convex block-shaped blocking portion 1024 can abut against the first joint pipe portion 103.

It should be noted that the blocking portion 1024 may be formed by separate processing and then fixedly connected to the second valve seat body portion 102a, or the blocking portion 1024 and the second valve seat body portion 102a may be directly formed by integral processing.

In addition, the connection mode between the first valve seat part 101 and the second valve seat part 102 of this embodiment is also changed to a certain extent, and specifically, the second valve seat part 102 provided in this embodiment includes a valve seat connection portion 1025, where the valve seat connection portion 1025 includes a valve seat bottom wall portion 10251 and a valve seat outer peripheral portion 10252, the valve seat outer peripheral portion 10252 is a structure formed by extending axially along the axial outer edge of the valve seat bottom wall portion 10251, and is substantially annular, and the lower end opening of the side wall portion 1011 is located in the valve seat outer peripheral portion 10252.

The sidewall 1011 of the present embodiment further includes a second stepped portion 10113, the second stepped portion 10113 is substantially in the form of an inverted annular step, and is located at the lower end of the sidewall 1011, and includes a second stepped transverse portion 101131 and a second stepped longitudinal portion 101132, the second stepped transverse portion 101131 is a more horizontal portion of the second stepped portion 10113, the second stepped longitudinal portion 101132 is a more vertical portion of the second stepped portion 10113, in the present embodiment, the second stepped transverse portion 101131 is arranged horizontally, and the second stepped longitudinal portion 101132 is arranged vertically.

When the first valve seat member 101 and the second valve seat member 102 are connected, the lower end portion of the second stepped vertical portion 101132 may be inserted into the valve seat peripheral portion 10252 until the lower end of the second stepped vertical portion 101132 abuts against the valve seat bottom wall portion 10251, and at this time, a predetermined distance may be provided between the upper end of the valve seat peripheral portion 10252 and the second stepped horizontal portion 101131, and the distance may be equal to or greater than 0.

With the above arrangement, the connection between the first valve seat member 101 and the second valve seat member 102 is reliable.

The electric valve in the present embodiment is exemplified as a type that can completely close the flow rate, and it should be noted that those skilled in the art can understand that the electric valve may also be a structure of an electric valve that cannot completely close the flow rate (that is, when the valve element 202 is located at the position where it moves closest to the valve port, the valve element 202 does not abut against the valve port 10 a).

In addition, in addition to the above embodiments, the valve body 202, the valve shaft assembly 201, and other components are assembled in a split manner or mechanically divided at different positions, and the functions of the geometrically corresponding parts are not substantially changed, and these structures are adaptively modified and combined, which also fall within the protection scope of the present invention.

It should be noted that, in the present embodiment, the terms of orientation such as up, down, left, right, etc. are used as references for 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 is 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 (16)

1. An electrically operated valve comprising a valve seat assembly (10), the valve seat assembly (10) comprising a first valve seat part (101) and a second valve seat part (102), the first valve seat part (101) comprising a side wall portion (1011), the side wall portion (1011) being fixedly connected with the second valve seat part (102);

the valve seat assembly (10) further comprises a first connecting pipe part (103), the side wall part (1011) further comprises a side wall connecting hole part (10111), the first connecting pipe part (103) is inserted into the side wall connecting hole part (10111), and the first connecting pipe part (103) is fixedly connected with the first valve seat part (101);

the second valve seat component (102) comprises a blocking part (1024), the direction of inserting the first connecting pipe part (103) into the side wall connecting hole part (10111) is an inserting direction X, a plane Y perpendicular to the inserting direction X exists, and an overlapping area exists between the orthographic projection of the blocking part (1024) along the plane Y and the orthographic projection of the first connecting pipe part (103) along the plane Y.

2. The electric valve according to claim 1, wherein the first valve seat part (101) further comprises a top wall portion (1012), the side wall portion (1011) and the top wall portion (10120) being integrally formed, the top wall portion (1012) extending from the side wall portion (1011) towards the center of the electric valve.

3. Electrically operated valve according to claim 1, characterized in that the blocking part (1024) is ring shaped.

4. The electric valve according to claim 1, wherein the blocking portion (1024) is a bump structure.

5. The electrically operated valve according to claim 4, wherein the second valve seat part (102) comprises a second valve seat body part (102 a), and the blocking part (1024) is fixedly connected or integrally formed with the second valve seat body part (102 a).

6. The electric valve of claim 2, wherein the top wall (1012) comprises a fitting hole portion (1013), the fitting hole portion (1013) penetrates through the top wall (1012), and a nut assembly (40), the nut assembly (40) is arranged through the fitting hole portion (1013), and the nut assembly (40) is fixedly connected with the top wall (1012).

7. The electrically operated valve of claim 6, wherein the nut assembly (401) comprises a rim segment (4011), the rim segment (4011) being disposed through the engagement bore portion (1013), the rim segment (4011) being in interference press fit engagement with the engagement bore portion (1013).

8. The electric valve according to claim 6, wherein the nut assembly (40) comprises a nut body portion (401) and a nut connecting portion (402), the nut connecting portion (402) being injection molded as an insert with the nut body portion (401), the nut connecting portion (402) being fixedly connected with the top wall portion (1012).

9. The electric valve according to claim 8, wherein the lower surface of the nut connecting portion (402) is planar, the upper surface of the top wall portion (1012) is planar, and the lower surface of the nut connecting portion (402) is engaged with and fixedly connected to the upper surface of the top wall portion (1012).

10. The electric valve according to claim 6, characterized in that the top wall (1012) comprises a balancing hole portion (1014), the balancing hole portion (1014) extending through the top wall (1012).

11. The electric valve according to claim 10, wherein the balance hole part (1014) and the fitting hole part (1013) do not overlap, or a part of the balance hole part (1014) and a part of the fitting hole part (1013) overlap.

12. The electric valve according to claim 1, further comprising an outer housing (30), wherein the side wall portion (1011) comprises a first step portion (10112), the first step portion (10112) is annularly stepped, the first step portion (10112) comprises a first step transverse portion (101121) and a first step longitudinal portion (101122), the outer housing (30) is sleeved on the first step longitudinal portion (101122), an overlapping area exists between an orthographic projection of the outer housing (30) along a plane of a cross section of the electric valve and an orthographic projection of the first step transverse portion (101121) along a plane of the cross section of the electric valve, and the outer housing (30) is fixedly connected with the valve seat assembly (10).

13. The electric valve as claimed in claim 12, wherein the open side of the outer housing (30) is horizontal, the first stepped cross portion (101121) is horizontal, the outer housing (30) and the first stepped cross portion (101121) are engaged, and the outer housing (30) and the valve seat assembly (10) are fixedly connected.

14. The electric valve according to claim 1, wherein the second valve seat member (102) comprises an insertion portion (1021) and a limiting portion (1022), the insertion portion (1021) is inserted from an opening of the side wall portion (1011), an orthographic projection of the insertion portion (1021) along a plane of a longitudinal section of the electric valve has an overlapping area with an orthographic projection of the side wall portion (1011) along a plane of a longitudinal section of the electric valve, and an orthographic projection of the side wall portion (1011) along a plane of a cross section of the electric valve has an overlapping area with an orthographic projection of the limiting portion (1022) along a plane of a cross section of the electric valve.

15. The electrically operated valve according to claim 1, wherein the second valve seat member (102) comprises a valve seat connection portion (1025), the valve seat connection portion (1025) comprising a valve seat bottom wall portion (10251) and a valve seat outer peripheral portion (10252), the valve seat outer peripheral portion (10252) extending axially along a circumferential outer edge of the valve seat bottom wall portion (10251), the open end portion of the side wall portion (1011) being located within the valve seat outer peripheral portion (10252).

16. The electric valve according to claim 15, wherein the side wall portion (1011) comprises a second stepped portion (10113), the second stepped portion (10113) is in the shape of an inverted annular step, the second stepped portion (10113) comprises a second stepped transverse portion (101131) and a second stepped longitudinal portion (101132), a lower end of the second stepped longitudinal portion (101132) abuts against the valve seat bottom wall portion (10251), and a predetermined distance is provided between an upper end of the valve seat outer peripheral portion (10252) and the second stepped transverse portion (101131).

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