CN114838179A - Electric valve - Google Patents

Abstract

An electric valve comprises a valve body and a coil, wherein the coil is sleeved on the valve body, the valve body comprises a valve core rotor assembly and a shell assembly, the valve core rotor assembly comprises a valve shaft assembly and an elastic piece, and the shell assembly comprises a shell and a guide rod; the shell is fixedly connected with the guide rod or integrally processed and formed; the valve shaft assembly comprises a channel part, the elastic piece is sleeved on the guide rod, and part of the guide rod is positioned in the channel part; the application provides an electrically operated valve, shell part with guide bar fixed connection or integrated into one piece, the guide bar is located to the elastic component cover, and the part of guide bar is located passageway portion, and the elastic component can not break away from the guide bar basically.

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 electrically operated valve having a guide bush 20 and a valve shaft holder 30, wherein the guide bush 20 is provided with an external thread portion 23, the valve shaft holder 30 is provided with an internal thread portion 33, and the external thread portion 23 and the internal thread portion 33 constitute a thread portion feeding mechanism 28 of the electrically operated valve.

The motor-operated valve further includes a fixed member 70, a return spring 75 is fitted around the outer periphery of the fixed member, the return spring 75 is compressed when the valve shaft holder 30 moves upward relative to the guide bush 20 and the screw portion 23 of the guide bush 20 and the screw portion 33 of the valve shaft holder 30 are in an unthreaded state, the valve shaft holder receives a downward spring force of the return spring 75, and the movable screw portion 33 and the fixed screw portion 23 are unthreaded by the elastic force of the return spring 75 when the rotor member rotates in the reverse direction.

[ summary of the invention ]

The invention aims to provide an electric valve, which comprises a valve body and a coil, wherein the coil is sleeved on the valve body, the valve body comprises a valve core rotor assembly and a shell component, the valve core rotor assembly comprises a valve shaft assembly and an elastic piece, and the shell component comprises a shell and a guide rod;

the shell is fixedly connected with the guide rod or integrally processed and formed;

the valve shaft assembly comprises a channel part, the elastic piece is sleeved on the guide rod, and part of the guide rod is positioned in the channel part;

the application provides an electrically operated valve, shell part with guide bar fixed connection or integrated into one piece, the guide bar is located to the elastic component cover, and the part of guide bar is located passageway portion, and the elastic component can not break away from the guide bar basically.

[ 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 structural view of a rotor assembly of an electric valve core of the invention and a partial enlarged 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;

FIG. 6 is a schematic structural view of a second embodiment of a cartridge rotor assembly of the present invention;

FIG. 7 is a schematic structural view of a third embodiment of a cartridge rotor assembly of the present invention;

figure 8 is a schematic view of the construction of the reed of figure 7.

Fig. 9 is a sectional view of a related art electric valve.

Wherein fig. 1-8 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-hole; 2015 valve shaft inner wall portion; 20151 a first valve shaft inner wall portion; 20152, a valve shaft abutment; 20153 second valve shaft 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 valve core; 202a valve element head; 202b a spool abutment; 203 a rotor; 204 a second elastic member; 30 housing parts; 302 a guide rod; 3021 guiding the rod body; 3022 a guide bar fixing part; 208 an elastic member; 2081 a second spring; 2082 spring plate; 20821 a reed through hole part; 20822 a spring support; 20a spring abutment; 20c a channel portion; 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 5, 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 structural view of a rotor assembly of an electric valve core of the invention and a partial enlarged 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, fig. 1 is a cross-sectional view of a first embodiment of an electric valve provided in the present invention in a fully closed state, in one embodiment, the electric valve provided in the present invention includes a valve body and a coil 40, wherein the coil 40 is sleeved on the valve body. The valve body includes a core rotor assembly 20, a valve seat member 10, and a housing member 30. The stator coil 40 of the electric valve is connected to a driving controller, and when the driving controller is powered on, a pulse driving signal is sent to the coil 40, and the coil 40 generates a changing magnetic field, thereby driving the valve core rotor assembly 20 of the electric valve to rotate in the forward direction or the reverse direction. The valve spindle assembly 20 includes a valve spindle assembly 201, in this embodiment, the valve spindle assembly 201 includes a valve spindle 2011, an external thread portion 201a is provided on the valve spindle 2011, the valve seat member 10 includes a nut 102, an internal thread portion 10b is provided at an inner hole portion of the nut 102, the valve spindle 2011 is in threaded engagement (hereinafter, threaded engagement) with the nut 102, and the valve spindle 2011 displaces in an axial direction while the valve spindle assembly 20 rotates, so as to drive the valve spindle 202 to open and close the valve port 10 a.

Fig. 1 is a sectional view of the electric valve of the present invention in a fully closed state. Referring to fig. 2 and 3, the electric valve of the present invention includes a valve body and a coil 40, wherein the valve body includes a valve seat member 10 (shown in fig. 2), a valve core rotor assembly 20 (shown in fig. 3), and a housing member 30.

The valve seat member 10 has a valve port 10a, a first inlet/outlet passage 10d and a second inlet/outlet passage 10e, the valve port 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 therethrough, a through hole penetrating vertically is provided at a substantially central position of the valve seat member 10, and a female screw portion 10b is provided in the through hole, in the present embodiment, the valve seat member 10 includes a nut 102 including the through hole, the nut 102 includes the through hole, and a female screw portion 10b is also provided in the through hole of the nut 102, the valve seat member 10 further includes a 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 such as integrally injection molding the connecting body as an insert with the nut 102, and then welding or press-fitting the connecting body to the valve seat 101, or a method such as press-fitting the nut 102 to the valve seat 101, in the present embodiment, the nut 102 and the valve seat 101 are fixedly connected by welding the connecting body and the valve seat 101), however, the nut 102 and the valve seat 101 may be integrally formed, the valve seat 101 may be integrally formed with the valve port 10a (of course, the valve port 10a may be formed in another component, and then the component is fixedly connected to the valve seat 10 a), and 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 inflow and outflow passages of the fluid medium of the electric valve and are generally used for connecting to a system pipe when the electric valve is installed in a cooling and 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 the 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 as an example.

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, an outer thread portion 201a is disposed at a substantially lower outer edge section of the valve shaft 2011, the valve core 202 is disposed through a central through hole of the valve shaft 2011, the valve core rotor assembly 20 further includes a second elastic member 204 disposed in a first valve shaft inner wall portion 20151 at the center of the valve shaft 2011, and the valve shaft assembly 201 further includes a bushing 2012 fixedly connected to a substantially end position of the valve shaft 2011.

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 the second elastic member 204 (including directly abutting or indirectly abutting, for example, when a gasket or a shim is disposed between the bushing 2012 and the second elastic member 204, the bushing 2012 is still subjected to an elastic load of the second elastic member 204, and thus the valve shaft assembly 201 still abuts against the second elastic member 204), in this embodiment, the bushing 2012 abuts against the second elastic member 204, and the bushing 2012 includes the spring abutting portion 20 a.

In addition, the electric valve provided in this embodiment further includes a housing part 30, the housing part 30 includes a housing 301 with an open end, the housing 301 is a thin-walled member and has a housing shape, and the lower end opening side of the housing 301 is hermetically welded to the valve seat member 10, so as to form a receiving chamber capable of receiving the upper half portion of the nut 102 and the main body portion of the valve core rotor assembly 20.

The housing part 30 further comprises a guide rod 302, and the guide rod 302 is fixedly connected with the housing 301 or integrally formed.

A substantially central position of the nut 102 in the valve seat member 10 is provided as a vertically penetrating hole, a female screw portion 10b (may also be referred to as a fixed screw portion) is provided substantially at a middle-lower position of the penetrating hole, and the female screw portion 10b is combined with a male screw portion 201a (may also be referred to as a movable screw portion) provided substantially at a lower position of the valve shaft 2011 to constitute a screw feeding mechanism (screw pair) of the electric valve. The nut 102 is provided with a fixed stop portion 10c protruding from the annular base body, and the fixed stop portion is engaged with a movable stop portion 201b provided on the valve body rotor assembly 20, so as to constitute a stop mechanism at the lower end of the stroke of the present electric valve (i.e. when the valve body 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 body rotor assembly 20 relative to the valve seat member 10, so as to limit the valve body rotor assembly 20 to continue to move downward in the axial direction). When the spool rotor assembly 20 rotates downward to the lowermost end of its stroke, the movable stopper 201b abuts against the mating surface corresponding to the fixed stopper 10c, so that the stroke of the downward movement of the spool rotor assembly 20 can be controlled.

In this embodiment, the valve shaft 2011 is fixedly connected with the rotor 203, so that the valve shaft 2011 can rotate synchronously with the rotor 203, and the valve shaft 2011 and the screw feed mechanism of the nut 102 can convert the rotary motion of the rotor 203 into axial movement, so as to drive the valve core 202 to enable the valve core head 202a to approach or be far away from the valve port 10a, thereby implementing a linear on-off regulation function of the flow of the electric valve.

Fig. 3 is a schematic structural view of the electric valve core rotor assembly of the present invention. The valve core rotor assembly 20 of the present electric valve includes a rotor 203 with magnetic poles in the circumferential direction, a valve shaft 2011 fixedly connected with the rotor 203, a valve core 202 passing through the central through hole of the valve shaft 2011, a second elastic element 204 disposed in a first valve shaft inner wall portion 20151 (mentioned later) in the center of the valve shaft 2011, and a bushing 2012 fixedly connected with the upper end of the valve shaft 2011.

In the present embodiment, the valve shaft 2011 includes a hole penetrating vertically, the inner wall of the through hole forms a substantially valve shaft inner wall portion 2015, 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 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 of the cross section of the valve shaft 2011, an orthographic projection (the orthographic projection is a closed line or a 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 line or a torus) of the second valve shaft inner wall portion 20153 along the plane, and in general for convenience of manufacturing, 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, and in this case, the inner diameter of the first valve shaft inner wall portion 20151 is larger than the inner diameter of the second valve shaft inner wall portion 20153, in the present embodiment, since the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 are both of equal diameter in the height direction, the orthogonal projection of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 along the plane of the cross section of the valve shaft 2011 is also circular.

Further, 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 circular, the orthogonal projection of the valve shaft abutting portion 20152 along the plane where the cross section of the valve shaft 2011 is located is circular, in this embodiment, the valve shaft abutting portion 20152 is in the horizontal direction, of course, the valve shaft abutting portion 20152 may be provided in a partially horizontal form, for example, the valve shaft abutting portion 20152 may be gradually extended upward or downward in a direction away from the center of the valve shaft abutting portion 20152, and it is understood that the valve shaft abutting portion 20152 only needs to have an extension distance in the horizontal direction in order to satisfy the requirement of the valve shaft abutting portion 20152.

Of course, the above description has been made on the structure of the first valve shaft inner wall portion 20151, the valve shaft abutment portion 20152 and the second valve shaft inner wall portion 20153, but the first valve shaft inner wall portion 20151, the valve shaft abutment portion 20152 and the second valve shaft inner wall portion 20153 according to the present invention are not limited to the above structure, and it is only necessary that there is one valve shaft abutment portion 20152 extending in the horizontal direction with a distance between the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153, and the valve shaft abutment portion 20152 can abut against the valve shaft assembly 201.

Furthermore, in this embodiment, the valve shaft 2011 includes the outer edge 2016, specifically, the outer edge 2016 includes a first outer edge 20161 and a second outer edge 20162, the first outer edge 20161 is located above the second outer edge 20162, the orthogonal projection of the first outer edge 20161 along the plane is located on the plane of the cross section of the valve shaft 2011, the orthogonal projection of the first outer edge 20161 along the plane is located on the periphery of the orthogonal projection of the second outer edge 20162 along the plane, for the convenience of processing, the cross sections of the first outer edge 20161 and the second outer edge 20162 are both circular, the portion of the valve shaft 2011 where the first outer edge 1 is located is provided with the rotor fixing portion 201c, the rotor 203 and the valve shaft fixing portion 201b can be directly or indirectly welded, riveted, injection-connected by using a magnetic plastic material, adhered by glue, etc., in this embodiment, the connecting member is injection-connected with the magnetic plastic material as an insert, 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 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.

In this embodiment, the valve shaft assembly 201 further includes a bushing 2012, in this embodiment, 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.

The valve shaft assembly 201 further comprises a channel part 20c, the guide rod 302 can penetrate through the channel part 20c, and the guide rod 302 can play a role in guiding and correcting the valve shaft assembly 201 through matching with the channel part 20c in the process that the valve shaft assembly 201 ascends or descends relative to the guide rod 302.

In the present embodiment, the electric valve further includes an elastic member 208, and the elastic member 208 can abut against the bushing 2012 or the valve shaft 2011. The elastic member 208 includes an inner edge portion 208a of the elastic member, in this embodiment, the elastic member 208 is a second spring 2081, the inner edge portion of the second spring 2081 forms the inner edge portion 208a of the elastic member, and the second spring 2081 is sleeved on the guide rod 302. In this embodiment, the guide bar 302 is fixedly connected to the housing 301. Specifically, the guide lever 302 includes a guide lever body portion 3021 and a guide lever fixing portion 3022, and the guide lever fixing portion 3022 is substantially a portion where the guide lever is connected to the housing member 30. The guide bar fixing portion 3022 is fixedly coupled to the housing 301, and the lower end of the guide bar 302 is inserted into the bush hole portion 20121 so that the portion of the guide bar 302 is positioned in the bush hole portion 20121 (passage portion 20c)

In the inner part, the guide rod 302 is inserted into the second spring 2081.

Thus, in the present embodiment, the bushing hole portion 20121 includes the passage portion 20 c.

In this embodiment, the valve element 202 is inserted into the inner wall portion 2015 of the valve shaft (the portion of the valve element 202 is located in the inner wall portion 2015 of the valve shaft), and the valve element 202 has a stepped shaft-like structure, which includes a valve element head portion 202a, the valve element head portion 202a is located at a substantially lower end position of the valve element 202, a tip end shape of the valve element head portion 202a is related to a flow rate regulation curve required by the electric valve, the valve element 202 further includes a valve element abutting portion 202b, the valve element abutting portion 202b is located at a substantially upper end or upper end position of the valve element 202, an orthogonal projection of the valve element head portion 202a along a plane is located in an orthogonal projection of the valve element abutting portion 202b along the plane on the plane of the cross section of the valve element 202, in this embodiment, the cross sections of the valve element head portion 202a and the valve element abutting portion 202b are both circular, and therefore an inner diameter of the valve element abutting portion 202b is greater than a diameter of the valve element head portion 202 a. In the present embodiment, the valve body 202 is inserted into the valve shaft inner wall portion 2015 of the valve shaft 2011 from the top downward direction, the valve body contact portion 202b thereof can be brought into contact with the valve shaft contact portion 20152, and the valve body head portion 202a thereof protrudes from the lower end of the second valve shaft inner wall portion 20153. In a plane in which the cross section of the spool 202 is located, there is an overlapping region between an orthogonal projection of the spool abutting portion 202b along the plane and an orthogonal projection of the valve shaft abutting portion 20152 along the plane, and therefore, the valve body contact portion 202b can be brought into contact with the valve shaft contact portion 20152 (of course, when a member such as a washer is provided between the valve shaft contact portion 20152 and the valve body contact portion 202b so as not to be brought into contact with each other directly, the projection relationship between the valve body contact portion 202b and the valve shaft contact portion 20152 may not satisfy the above relationship), in the present embodiment, the outer edge of the spool abutment portion 202b and the inner edge of the first valve shaft inner wall portion 20151 are both circular, the outer diameter of the spool abutment 202b is slightly smaller than the inner diameter of the first valve shaft inner wall 20151, the outer diameter of the spool abutment 202b is larger than the inner diameter of the second valve shaft inner wall 20153, and the outer diameter of the maximum spool head 202a is slightly smaller than the inner diameter of the second valve shaft inner wall 20153, so that the spool 202 can be supported by the valve shaft abutment 20152 of the valve shaft 2011.

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

The lower end of the second elastic element 204 abuts against the valve element 202, and the upper end of the second elastic element 204 abuts against the bushing 2012 (including direct abutment or indirect abutment, for example, when a gasket or the like is provided between the bushing 2012 and the second elastic element 204, the elastic force of the second elastic element 204 can be transmitted to the bushing 2012 through the gasket or other components, and at this time, the second elastic element 204 abuts against the bushing 2012 indirectly).

Fig. 4 is a sectional view of the valve body when the rotor assembly of the electric valve core of the invention is opened to the state that the second spring is about to be compressed.

The core rotor assembly 20 in fig. 4 is in an almost over-opened state (over-opened state: a state in which the core rotor assembly 20 is opened upward beyond its prescribed upper limit stroke). The poppet rotor assembly 20 of fig. 1 is in a fully closed position with the poppet head 202a in a position closest to the valve port 10a and the portion of the guide rod 302 of fig. 1 in the bushing bore. When the valve plug head 202a is in a position far away from the valve port 10a in fig. 4, and the external threaded portion 201a of the valve shaft 2011 still has a length (indicated by length L in the figure) that is still screwed with the internal threaded portion 10b of the nut 102, compared to the state in fig. 1, the guide rod 302 in fig. 4 further extends into the bushing hole 20121, and the guide rod 302 can guide the valve shaft assembly 201 during the process of lifting the valve shaft assembly 201 relative to the guide rod 302 (for example, when the valve shaft assembly 201 is about to shift relative to the axis of the electric valve, the valve shaft assembly 201 can contact with the guide rod 302 to limit further shifting of the valve shaft assembly 201), and at this time, the second spring 2081 is still in its free length state, and the upper end surface of the second spring 2081 just contacts the housing 301.

Fig. 5 is a cross-sectional view of the valve body when the rotor assembly of the electric valve core of the invention is opened excessively (the thread pair is unscrewed). The valve core rotor assembly 20 in fig. 5 continues to move upward by a stroke height L relative to the position shown in fig. 4, at which time the movable threaded portion 201a of the valve shaft 2011 is just unscrewed from the fixed threaded portion 10b of the nut 102, the compression amount by which the second spring 2081 is further compressed relative to the state in fig. 4 is L, in the process, the guide rod 302 can limit the offset of the second spring 2081 (in the process of contracting the second spring 2081, the guide rod 302 can guide the second spring 2081), the second spring 2081 is compressed to generate an elastic force, and the downward elastic force is finally transmitted to the valve shaft assembly 201, that is, the valve shaft assembly 201 is finally pressed by the second spring 2081.

If the core rotor assembly 20 continues to rotate in the open direction, the core rotor assembly 20 will not continue to rise relative to the nut 102 because the thread pairs are unthreaded; 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 10b are again screwed together because the valve shaft 2011 receives the downward spring pressing force of the second spring 2081, and the spool rotor assembly 20 is rotated and moved downward.

In the electric valve of the present embodiment, the second spring 2081 is sleeved on the guide rod 302, the guide rod 2081 is inserted into the bushing hole part 20121, and the deflection of the second spring 2081 can be limited, the second spring 2081 is relatively stable in the electric valve, when the valve shaft assembly 201 moves up and down relative to the guide rod 302, the deflection of the valve shaft assembly 201 can also be limited, and the valve shaft assembly 201 has better coaxiality with the axis of the electric valve in the up and down movement process.

As shown in fig. 1, 4 and 5, in this embodiment, the second spring 2081 is always sleeved on the outer edge of the guide rod 302, and no matter what opening degree state the electric valve is, the second spring 2081 has substantially no risk of failure of disengagement and displacement, and the second spring 2081 is not easily twisted or deflected.

Fig. 6 is a schematic structural view of a core rotor assembly according to a second embodiment of the present invention. Compared with the first embodiment shown 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 integrally changed. 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 (also referred to as a movable screw portion), the valve shaft main body portion 2013 is fixedly connected to the tubular member 2014, and the center through hole after the fixed connection forms the valve shaft inner wall portion 2015, in the present embodiment, a part 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 substantially hollow and cylindrical, the cylindrical member 2014 comprises a cylindrical member abutting portion 2041, the cylindrical member abutting portion 2041 abuts against the second elastic member 204, the cylindrical member abutting portion comprises a spring abutting portion 20a, a cylindrical member through hole 201411 is arranged at a substantially central position of the cylindrical member abutting portion 2041, an orthographic projection of the cylindrical member through hole 201411 along a plane of the cross section of the valve shaft assembly 201 is located outside an orthographic projection of the guide rod body portion 3021 along the plane, in the embodiment, the cylindrical member through hole 201411 and the outer edge of the guide rod body portion 3021 are circular in cross section, therefore, the diameter of the cylindrical member through hole 201411 is larger than that of the guide rod body portion 3021, and the cylindrical member through hole 201411 comprises a channel portion 20 c. The upper end surface of the valve shaft main body 2013 forms a valve shaft abutment 20152, the inner bore wall of the valve shaft assembly 201 located on the valve shaft abutment 20152 forms a first valve shaft inner wall 20151, the inner bore wall located below the valve shaft abutment 20152 forms a second valve shaft inner wall 20152, the spool abutment 202b and the second resilient element 204 are accommodated in the space defined by the cylindrical member 2014 and the valve shaft main body 2013, and the guide rod body 3021 of the guide rod 302 extends from the cylindrical member hole 201411 and is partially located in the cylindrical member hole 201411.

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.

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.

Fig. 7 is a schematic structural view of a third embodiment of a core rotor assembly according to the present invention. Compared with the first embodiment in fig. 5, the difference of this embodiment is mainly in the structure of the elastic member 208. Referring to fig. 8, the elastic member 208 of the present embodiment is a spring 2082, and the present embodiment adopts a structure of a spring 2082 having elasticity, and can also perform the same elastic pre-tightening and restoring function.

The movable threaded portion 201a of the valve shaft 2022 shown in fig. 7 is in a state of being just unscrewed from the fixed threaded portion 10b of the nut 102, and the reed 2082 is in a compressed state. The spring 2082 is compressed to generate an elastic force, and the downward elastic force is finally transmitted to the valve shaft 2011, i.e., the valve shaft assembly 201 is pressed by the spring 2082 in a downward elastic manner. If the core rotor assembly 20 continues to rotate in the over-open direction, the core rotor assembly 20 will not rise again because the thread pairs are unscrewed; when the valve core rotor assembly 20 is rotationally moved downwards in the valve closing direction by the driving force of the 40 coils, the external thread 201a and the internal thread 10b are screwed again because the valve shaft 2011 is pressed by the spring 2082 downwards elastically. In this embodiment, the reed 2082 is sleeved on the outer edge of the guide rod 302 through the central hole thereof, and the reed 2082 is not substantially removed from the guide rod 302 no matter what opening degree state the electric valve is.

Specifically, the spring plate 2082 may be made of a thin-walled metal material with elasticity, the spring plate 2082 is provided at the center thereof with a spring plate through hole portion 20821, and a plurality of spring plate support portions 20822 (generally three or more) are provided at intervals in the circumferential direction, and the spring plate through hole portion 20821 includes a spring plate hole portion 208 a. When the valve shaft assembly 201 is raised or lowered relative to the guide rod 302, the guide rod 302 passes through the reed through hole 20821 and extends into the bushing hole 20121, and the bushing hole 20121 can guide and guide the valve shaft assembly 201 by engaging with the guide rod 302.

When the valve shaft assembly 201 moves upward relative to the valve seat member 10 to a certain stage, the reed support portion 20822 contacts with the housing member 30, which is a critical point at which the reed 2082 abuts against the housing 301, and if the valve shaft assembly 201 continues to move upward relative to the valve seat member 10, the reed support portion 20822 abuts against the top wall of the housing 31, the reed support portion 20822 moves radially under the force, the reed support portion 20822 abuts against the housing 301, the lower end portion of the reed 2082 abuts against the valve shaft assembly 201, and the reed 2082 applies a downward elastic force to the valve shaft assembly 201.

When the valve shaft assembly 201 abuts against the spring plate 2082, the spring plate support portion 20822 will move radially, the valve shaft assembly 201 can move further in the direction of approaching the spring plate 2082, and the spring plate 2082 also applies a downward elastic force to the valve shaft assembly 201.

It should be noted that the guide rod 302 may be integrally formed with the housing 301, and the housing 301 of the present invention is not limited to an integral type, for example, the top of the housing 301 and the side of the housing 301 may be separately formed and then fixedly connected, and in this case, the guide rod 302 may be integrally formed with the top of the housing 301.

In the embodiments described in the present specification, it is to be noted that the addition of a washer or a shim to the lower end portion of the second elastic member 204, or the addition of a washer between the valve body abutting portion 202b and the valve shaft abutting portion 20152, or the addition of a washer to the upper end portion of the second elastic member 204 does not affect the core content of the present application, and the two members of the present application are abutted to each other, including the two members directly abutted to each other or the two members abutted to each other by another member. 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 which is 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, 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 or not, the present solution provides various solutions, and the "may" is used in the specification, so it should be understood that "may" in the present application cannot be understood as "must".

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 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 (7)

1. An electric valve is characterized by comprising a valve body and a coil (40), wherein the coil (40) is sleeved on the valve body, the valve body comprises a valve core rotor assembly (20) and a shell component (30), the valve core rotor assembly (20) comprises a valve shaft assembly (201) and an elastic piece (208), and the shell component (30) comprises a shell (301) and a guide rod (302);

the shell (301) is fixedly connected with the guide rod (302) or integrally processed and formed;

the valve shaft assembly (201) comprises a channel part (20c), the elastic piece (208) is sleeved on the guide rod (302), and part of the guide rod (302) is located on the channel part (20 c).

2. The electrically operated valve according to claim 1, wherein the valve body further comprises a valve seat member (10), the valve seat member (10) comprises a female screw portion (10b), the valve shaft assembly (201) comprises a male screw portion (201a), and when the female screw portion (10b) and the male screw portion (201a) are in a non-screw-engagement state, an upper end portion of the elastic member (208) abuts against the housing member (30), and a lower end portion of the elastic member (208) abuts against the valve shaft assembly (201).

3. The electrically operated valve according to claim 2, wherein the valve shaft assembly (201) comprises a valve shaft (2011) and a bushing (2012), the valve shaft (2011) and the bushing (2012) are fixedly connected, the bushing (2012) comprises a bushing hole portion (20121), a portion of the guide rod (302) is located at the bushing hole portion (20121), the bushing hole portion (20121) comprises the channel portion (20 c);

the spring (208) can be abutted against the bushing (2012) or the valve shaft (2011).

4. The electric valve according to claim 2, wherein the valve shaft assembly (201) comprises a valve shaft main body portion (2013) and a barrel (2014), the valve shaft main body portion (2013) and the barrel (2014) being fixedly connected;

the barrel (2014) including a barrel abutment (20141), the barrel abutment (20141) including a barrel through-hole portion (201411), a portion of the guide rod (302) being located at the barrel through-hole portion (201411), the barrel through-hole portion (201411) including the channel portion (20 c);

the elastic member (208) can abut against the cylindrical member (2014).

5. The electric valve according to any of claims 1-4, wherein the elastic member (208) comprises a second spring (2081), and the second spring (2081) comprises an elastic member inner edge portion (208 a); part of the guide rod (302) is located in the elastic member inner edge portion (208 a).

6. The electric valve according to any one of claims 1 to 4, wherein the elastic member (208) comprises a spring plate (2082), the spring plate (2082) comprises a spring plate through hole portion (20821), the guide rod (302) is inserted into the spring plate through hole portion (20821), the spring plate through hole portion (20821) comprises an elastic member inner edge portion (208a), a portion of the guide rod (302) is located in the elastic member inner edge portion (208a), and the spring plate (2082) further comprises a spring plate support portion (20822), and when the internal thread portion (10b) and the external thread portion (201a) are in a non-screw state, the spring plate support portion (20822) abuts against the housing member (30).

7. The electric valve according to any of claims 1-6, further comprising a second resilient member (204), a spool (202);

the valve shaft assembly (201) comprises a valve shaft inner wall part (2015), the valve shaft inner wall part (2015) comprises a valve shaft abutting part (20152), the valve core (202) penetrates through the valve shaft assembly (201), the valve core (202) comprises a valve core abutting part (202b), and the valve core abutting part (202b) can abut against the valve shaft abutting part (20152);

the valve shaft assembly (201) further comprises a spring abutting part (20a), the upper end part of the second elastic piece (204) abuts against the spring abutting part (20a), and the lower end part of the spring (204) abuts against the valve core (202).

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