CN115126885A - Electric valve - Google Patents

Abstract

An electric valve comprises a valve body, wherein the valve body comprises a valve seat part and a valve core rotor component, and the valve core rotor component comprises a valve shaft component, a valve core, a first elastic part, a second elastic part and a butting part; the valve shaft assembly comprises a valve shaft abutting part, and the second elastic piece is supported on the valve shaft abutting part; the valve core comprises a first valve core abutting part and a second valve core abutting part, the valve core is arranged in the valve shaft assembly in a penetrating mode, and the first valve core abutting part can abut against the second elastic part; the first elastic piece abuts against the valve shaft assembly, the abutting part comprises a first abutting part, the first elastic piece abuts against the first abutting part, the abutting part comprises a second abutting part, the second abutting part can abut against the second valve core abutting part, the abutting part comprises a third abutting part, and the third abutting part can abut against the valve shaft assembly; when the third abutting part abuts against the valve shaft assembly and the first valve core abutting part abuts against the second elastic part, the second abutting part and the second valve core abutting part do not abut against each other, so that the impact force of the valve core on the valve port at the moment when the valve core contacts with the valve port can be 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

Referring to fig. 11, CN109723884A discloses an electric valve, which has a guide bush 20, a valve shaft holder 30, a fixed male screw portion 23 provided on the guide bush 20, and a movable female screw portion 33 provided on the valve shaft holder 30, wherein the fixed male screw portion 23 and the movable female screw portion 33 constitute a screw feeding mechanism 28 of the electric valve. The valve body of the electric valve is mainly composed of three parts.

In the valve shaft 10 of the electric valve, a compression coil spring (urging member) 60 is disposed between a stepped surface 13 formed between an upper small diameter portion 11 and a lower large diameter portion 12 of the valve shaft 10 and a lower surface of a top portion 32 of a valve shaft holder 30, with a disk-shaped presser plate 61 disposed on a lower surface side of the top portion 32 of the valve shaft holder 30 interposed therebetween, and is compressed so as to be inserted into the upper small diameter portion 11 of the valve shaft 10, and the compression coil spring 60 urges the valve shaft 10 and the valve shaft holder 30 in a direction in which they are separated from each other in a lifting direction (an axis O direction), in other words, the compression coil spring 60 always urges the valve shaft 10 (a valve element 14) downward (a valve closing 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 seat part and a valve core rotor component, and the valve core rotor component comprises a valve shaft component, a valve core, a first elastic piece, a butting part and a second elastic piece;

the valve shaft assembly comprises a valve shaft abutting part, and the second elastic piece is supported on the valve shaft abutting part;

the valve core comprises a first valve core abutting part, the valve core is arranged in the valve shaft assembly in a penetrating mode, and the first valve core abutting part can abut against the second elastic part;

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

the valve seat component comprises a valve port, and the valve core can be abutted against the valve port;

when the third abutting part abuts against the valve shaft assembly and the first valve core abutting part abuts against the second elastic part, the second abutting part and the second valve core abutting part do not abut against each other.

When the third abutting portion abuts against the valve shaft assembly and the first valve core abutting portion abuts against the second elastic piece, the second abutting portion does not abut against the second valve core abutting portion, the valve core cannot be subjected to elastic load of the first elastic piece, and impact force of the valve core on the valve port at the moment when the valve core contacts with the valve port can be reduced.

[ description of the drawings ]

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

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

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

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

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

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

figure 7 is a cross-sectional view of the valve body of the electrically operated valve of the present invention over-opened to thread pair unthread, and a close-up view thereof;

fig. 8 is a sectional view of a valve body when an electric valve according to a second embodiment of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof;

fig. 9 is a sectional view of a valve body when an electric valve according to a third embodiment of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof;

fig. 10 is a sectional view of a valve body when an electric valve according to a fourth embodiment of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof;

fig. 11 is a sectional view of a related art electric valve.

The following reference numerals are included in fig. 1-10:

10a valve seat member; 101 a valve seat; 102 a nut; 103 a first pipe connecting part; 104 a second pipe connecting part; 10a valve port; 10b an internal threaded portion; 10c fixing the stopper; 10d a first access channel; 10e a second access passage; 20a spool rotor assembly; 201a valve shaft assembly; 2011 the valve shaft; 2012 a bushing; 20121 a bushing hole portion; 2013 a valve shaft body; 2014 a barrel; 20141 a barrel abutment; 201411 a barrel through bore portion; 2015 valve shaft inner wall portion; 20151 a first valve shaft inner wall portion; 20152 a stepped portion; 20153 second valve shaft inner wall portion; 20154, a valve shaft abutment; 20155 a third spool inner wall portion; 2016 an outer edge portion; 20161 a first outer edge portion; 20162 a second peripheral portion; 201a male 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 first spool abutment; 202c a second spool abutment; 202d a third spool abutment; 203 a rotor; 204 a first elastic member; 206 against the part; 206a first abutment; 206b a second abutment; 206c a third abutment; 2061 a washer member; 20611 a washer aperture portion; 2062 abutting against the frame; 20621 abutting the top of the frame; 20622 abutting the side of the frame; 20623 abutting the shelf hole portion; 208 a second resilient member; 20a spring abutment; 20b a restriction portion; 30 a housing; 40 coils.

[ detailed description ] embodiments

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

Please refer to fig. 1 to 7, wherein fig. 1 is a cross-sectional view of an electrically operated valve of the present invention in a fully closed state; figure 2 is a schematic view of the construction of the valve seat component of the electric valve of the present invention; figure 3 is a schematic view of the construction of the rotor assembly with the electrically operated valve of the present invention in a fully closed position and a close-up view thereof; FIG. 4 is a cross-sectional view of the valve body of the electrically operated valve of the present invention open to a point where the valve element is just not bearing the spring force of the valve element spring, and a close-up view thereof; FIG. 5 is a cross-sectional view of the valve body of the present invention with the electric valve open to the point where the head of the valve cartridge just does not contact the valve port, and a partial enlarged view thereof; fig. 6 is a sectional view of the valve body when the electric valve of the invention is opened to the maximum opening degree, and a partially enlarged view thereof, and fig. 7 is a sectional view of the valve body when the electric valve of the invention is opened excessively to the state where the screw pair is unscrewed, and a partially enlarged view thereof;

referring to fig. 1-3, in an 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 (see fig. 3), a valve seat member 10 (see fig. 2), and a housing 30 (see fig. 1).

Referring to fig. 1, one end of the housing 30 is open, the housing 30 is a thin-walled member and has a housing shape, and the lower open side of the housing 30 is hermetically welded to the valve seat member 10, thereby forming a receiving chamber for receiving an upper half portion of a nut 102 (mentioned below) and a main body portion of a core rotor assembly 20 (mentioned below).

Referring to fig. 3, the valve core rotor assembly 20 of the present electric valve includes a rotor 203 having magnetic poles in a circumferential direction, a valve shaft assembly 201 fixedly connected to the rotor 203 (in this embodiment, the valve shaft assembly 201 includes a valve shaft 2011 and a bushing 2012, the bushing 2012 is fixed to a substantially end position of the valve shaft 2011, the bushing 2012 is fixedly connected to the valve shaft 2011 by press fitting or welding, and the bushing 2012 includes a bushing hole 20121 penetrating through an upper surface and a lower surface thereof), a valve core 202 inserted into a central through hole of the valve shaft 2011, a first elastic member 204 disposed in a first valve shaft inner wall portion 20151 (mentioned below) of the valve shaft 2011, a second elastic member 208 disposed in a second valve shaft inner wall portion 20153 (mentioned below) of the valve shaft 2011, and an abutting member 206 disposed in the first valve shaft inner wall portion 20151 of the valve shaft 2011.

Referring to fig. 1, the 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, so that the coil 40 generates a changing magnetic field, thereby driving the valve core rotor assembly 20 of the electric valve to rotate clockwise or counterclockwise. In this embodiment, the valve shaft 2011 is fixedly connected to the rotor 203, so that the valve shaft 2011 can rotate synchronously with the rotor 203, and the screw feeding mechanism of the valve shaft 2011 and the nut 102 can convert the rotation 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 switching function of the electric valve flow.

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

In the present embodiment, the valve seat member 10 includes the nut 102, the nut 102 includes a through hole, the inner edge of the through hole of the nut 102 is provided with the internal threaded portion 10b, the valve seat member 10 further includes the valve seat 101, a portion of the nut 102 is located in the valve seat 101, and the nut 102 is fixedly connected to the valve seat 101 (for example, a mode of using the connecting body as an insert to be integrally injection-molded with the nut 102, and then welding or press-fitting the connecting body to the valve seat 101, or a mode of directly press-fitting and fixing the nut 102 to the valve seat 101, or the like, in the present embodiment, a mode of using the connecting body as an insert to be integrally injection-molded with the nut 102, and welding and fixing the connecting body to the valve seat 101 is used to fixedly connect the nut 102 to the valve seat 101), of course, the nut 102 and the valve seat 101 may also be integrally formed.

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 core rotor assembly 20, so as to constitute a stop mechanism at the lower end of the stroke of the present electric valve, that is, when the valve core rotor assembly 20 moves downward relative to the valve seat member 10 to a certain extent, the movable stop portion 201b can abut against the fixed stop portion 10c to limit the rotation of the valve core rotor assembly 20 relative to the valve seat member 10, so as to limit the downward movement of the valve core rotor assembly 20 in the axial direction, and thus the downward movement stroke of the valve core rotor assembly 20 can be controlled.

In the present embodiment, the valve port 10a is integrally formed in the valve seat 101 (of course, the valve port 10a may be formed in another member, and this member is fixedly connected to the valve seat 10), the valve port 10a can be abutted against the valve body head 202a of the valve body 202, the valve seat 101 is fixedly connected to the first pipe connecting portion 103 and the second pipe connecting portion 104, and the first pipe connecting portion 103 and the second pipe connecting portion 104 serve as inflow and outflow passages for a fluid medium of an electric valve and are generally used for connecting to a system pipe when the valve seat 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 present invention may be applied to a form in which a flow path through which a refrigerant fluid passes is directly provided in the valve seat 101, or the first connecting pipe portion 103 and the second connecting pipe portion 104 may be connected to the valve seat 101 by flange sealing, for example, in a case where 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 joint pipe portion 103, the second joint pipe portion 104, and the valve seat 101 are exemplified by welding.

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

With continued reference to fig. 3, the step 20152 and the valve shaft abutting portion 20154 extend horizontally, the step 20152 is higher than the valve shaft abutting portion 20154, the outer edge of the step 20152 intersects with the first valve shaft inner wall portion 20151, the inner edge of the step 20152 intersects with the second valve shaft inner wall portion 20153, the outer edge of the valve shaft abutting portion 20154 intersects with the second valve shaft inner wall portion 20153, and the inner edge of the step 20154 intersects with the third valve shaft inner wall portion 20155, when the cross sections of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155 are all circular, the positive projection of the step 20152 and the valve shaft abutting portion 20154 along the plane of the cross section of the valve shaft 2011 is circular, in this embodiment, the step 20152 and the valve shaft abutting portion 20154 are horizontal, of course, the step 20152 and the valve shaft abutting portion 20154 may be provided in a non-flat form, for example, in a direction away from the center of the valve shaft abutting portion 20154, the valve shaft abutting portion 20154 extends gradually upward or downward (step 20154 is equivalent), it is understood that the valve shaft abutment 20154 and the stepped portion 20152 only need to be extended in the horizontal direction.

Of course, although the above description has been made on the structure of the first valve shaft inner wall portion 20151, the stepped portion 20152, the second valve shaft inner wall portion 20153, the valve shaft abutment portion 20154 and the third valve shaft inner wall portion 20155, the first valve shaft inner wall portion 20151, the stepped portion 20152, the second valve shaft inner wall portion 20153, the valve shaft abutment portion 20154 and the third valve shaft inner wall portion 20155 of the present invention are not limited to the above structure, and in the present embodiment, it is only necessary to satisfy that one stepped portion 20152 having an extension distance in the horizontal direction is provided between the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153, and one valve shaft abutment portion 20154 having an extension distance in the horizontal direction is provided between the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155, the valve shaft abutment portion 20154 can abut against the valve body 202, and the stepped portion 20152 can abut against the member 206.

Referring to fig. 1, in this embodiment, the valve shaft 2011 includes an outer edge portion 2016, specifically, the outer edge portion 2016 includes a first outer edge portion 20161 and a second outer edge portion 20162, in the axial direction of the electric valve, the first outer edge portion 20161 is located above the second outer edge portion 20162, in the plane of the cross section of the valve shaft 2011, the outer edge of the first outer edge portion 20161 along the orthographic projection of the plane is located outside the outer edge of the second outer edge portion 20162 along the orthographic projection of the plane, for the convenience of processing, the outer edges of the first outer edge portion 20161 and the second outer edge portion 2 may be set to be circular, the portion of the first outer edge portion 20161 in the 2011 is provided with a rotor fixing portion 201c, the rotor 203 and the rotor fixing portion 201c may be fixed by direct or indirect welding, valve shaft, injection molding of magnetic plastic material, bonding by riveting glue, etc., in this embodiment, the valve shaft 2011 is injection-molded as a connecting piece, and then the valve shaft 2011 is fixedly connected with the connecting piece by welding, when the rotor 203 and the valve shaft 2011 are directly connected, the valve shaft 2011 may be injection-molded and connected to the magnetic plastic material as an insert.

The second peripheral edge portion 20162 is provided with an external thread portion 201a, and this external thread portion 201a constitutes a screw feeding mechanism (screw pair) of the present electric valve in combination with an internal thread portion 10b provided in an inner hole portion of the nut 102.

Referring to fig. 3, in the electric valve of the present embodiment, the electric valve further includes a second elastic element 208, in the present embodiment, the second elastic element 208 is a helical spring, the second elastic element 208 is located inside a second valve shaft inner wall portion 20153, the second elastic element 208 is sleeved on the valve core 202, an upper end portion of the second elastic element 208 can abut against the first valve core abutting portion 202b of the valve core 202 (in the electric valve shown in fig. 3, the upper end portion of the second elastic element 208 does not abut against the first valve core abutting portion 202b yet), and the second elastic element 208 is supported on the valve shaft abutting portion 20154.

In the plane where the cross section of the valve shaft assembly 201 is located, since there is an overlapping region between the orthogonal projection of the valve shaft abutment 20154 along the plane and the orthogonal projection of the second elastic piece 208 along the plane, the second elastic piece 208 can be supported on the valve shaft abutment 20154 (of course, when a member such as a washer is provided between the valve shaft abutment 20154 and the second elastic piece 208 so as not to directly abut against each other, the projection relationship between the valve shaft abutment 20154 and the second elastic piece 208 may not satisfy the above relationship).

Referring to fig. 3, in the present embodiment, the valve core 202 is inserted into the valve shaft assembly 201 (the portion of the valve core 202 is located inside the valve shaft inner wall 2015), and the valve core 202 has a stepped shaft-like structure, the valve core 202 includes a valve core head 202a, the valve core head 202a is located at a substantially lower end position of the valve core 202 and is located below the third valve shaft inner wall 20155, and a tip shape of the valve core head 202a is related to a flow rate regulation curve required by the electric valve.

The spool 202 further includes a first spool abutment portion 202b, and the first spool abutment portion 202b of the spool 202 can abut against the second elastic member 208 (in the state shown in fig. 3, the first spool abutment portion 202b does not abut against the second elastic member 208). Since an overlapping region exists between an orthogonal projection of the first valve body contact portion 202b along a plane where the cross section of the valve body 202 is located and an orthogonal projection of the second elastic member 208 along the plane, the first valve body contact portion 202b can abut against the second elastic member 208 (of course, when a member such as a gasket is provided between the first valve body contact portion 202b and the second elastic member 208 so as not to abut directly, the projection relationship between the first valve body contact portion 202b and the second elastic member 208 may not satisfy the above relationship).

In this embodiment, the outer edge of the first spool abutment portion 202b and the second spool inner wall portion 20153 are both circular in cross-section, and the diameter of the first spool abutment portion 202b is slightly smaller than the diameter of the second spool inner wall portion 20153, the outer diameter of the second elastic member 208 is slightly smaller than the diameter of the second spool inner wall portion 20153, and the outer diameter of the second elastic member 208 is larger than the diameter of the third spool inner wall portion 20155, so that the spool 202 can be supported by the second elastic member 208.

With continued reference to fig. 3, the valve core 202 of the present 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.

In this embodiment, the diameter of the valve core head 202a is larger than the diameter of the third valve shaft inner wall 20155, the valve core main body 2021 is inserted into the central through hole of the valve shaft 2011 from bottom to top, and the valve core sleeve 2022 is fitted over the valve core main body 2021 from top to bottom and fixed thereto.

Referring to fig. 3, the valve core rotor assembly 20 of the electric valve of the present embodiment further includes a first elastic member 204, the first elastic member 204 may be designed as a cylindrical coil spring, and the first elastic member 204 is located in the first valve shaft inner wall portion 20151.

The electric valve provided in this embodiment includes a spring abutting portion 20a, where the spring abutting portion 20a is approximately a portion of the valve shaft assembly 201 abutting against the upper end of the first elastic member 204 (including directly abutting against or indirectly abutting against, for example, when a gasket or the like is disposed between the bushing 2012 and the first elastic member 204, the bushing 2012 is still subjected to an elastic load of the first elastic member 204, and the valve shaft assembly 201 is still abutted against the first elastic member 204), in this embodiment, the bushing 2012 abuts against the first elastic member 204, and the bushing 2012 includes the spring abutting portion 20 a.

The electrically operated valve provided by the present application further includes an abutment member 206, the abutment member 206 includes a first abutment portion 206a, the lower end portion of the first elastic member 204 abuts against the first abutment portion 206a, the abutment member 206 further includes a second abutment portion 206b, the second abutment portion 206b can abut against the second spool abutment portion 202c, the abutment member 206 further includes a third abutment portion 206c, and the third abutment portion 206c can abut against the valve shaft assembly 201.

In the present embodiment, the lower end surface of the valve core sleeve 2022 can abut against the second elastic member 208 (as in the state of the electric valve in fig. 5, which will be mentioned later), the upper end surface of the valve core sleeve 2022 can abut against the washer member 2061 (as in the state of fig. 3), and the valve core sleeve 2022 includes the first valve core abutment portion 202b and the second valve core abutment portion 202 c.

With continued reference to fig. 3, in the present embodiment, the abutting member 206 is a washer member 2061, the washer member 2061 includes a washer hole portion 20611, a washer hole portion 20611 penetrates upper and lower surfaces of the washer 2061, an upper end of the valve element 202 penetrates the washer hole portion 20611, and an upper end of the valve element 202 penetrates the first elastic member 204 and the washer hole portion 20221, and an upper end portion of the valve element 202 is located above the washer hole portion 20221.

Through the above arrangement, when the first elastic element 204 is about to generate radial offset, the first elastic element 204 can be limited by the valve core 202 to reduce the radial offset of the first elastic element 204, so that the first elastic element 204 is more stable in the valve shaft assembly 201, which is beneficial to increasing the service life of the electric valve.

The washer 2061 can abut against the step 20152, specifically, in the plane of the cross section of the electric valve, the orthogonal projection of the washer 2061 along the plane and the orthogonal projection of the step 20152 along the plane overlap, so that the washer 2061 can abut against the step 20152 (of course, when two or more washers 2061 are provided between the washer 2061 and the step 20152, it is not necessary that each washer 2061 and step 20152 satisfy the above relationship).

Referring to fig. 3, referring to fig. 1, the electric valve is in a fully closed state (i.e., a state when the spool rotor assembly 20 is at the lowermost end of its stroke), and referring to fig. 1, at this time, the spool head 202a abuts against and is pressed against the valve port 10a, the first elastic member 204 is in a compressed state, and in this state, the first spool abutting portion 202b and the second elastic member 208 are axially distant from each other and are in a non-abutting state, the second spool abutting portion 202c abuts against the second abutting portion 206b of the washer member 2061, and the step portion 20152 and the third abutting portion 206c of the washer member 2061 are axially distant from each other and are in a non-abutting state.

Fig. 4 is a sectional view of the valve body when the electric valve of the present invention is opened to a point where the valve core just does not bear the elastic force of the first elastic member, and a partially enlarged view thereof. The position of the plug rotor assembly 20 in fig. 4 is opened upward by a certain height compared to the position of the plug rotor assembly 20 when the electric valve is fully closed in fig. 1, and the head 202a still collides with the valve port 10 a. With the rotor position shown in fig. 4 as a critical point, if the valve core rotor assembly 20 continues to open upward, the elastic force of the first elastic member 204 is carried by the step 20152 through the transmission of the washer 2061, and the valve core 202 is no longer subjected to the elastic load of the first elastic member 204.

In the present specification, the pressure of the first inlet/outlet passage 10d is greater than the pressure of the second inlet/outlet passage 10e, and therefore, a pressure difference exists between both sides of the valve port 10a, and therefore, the valve body 202 is always subjected to a pressure difference force generated by the pressure difference, and the valve body 202 shown in fig. 4 is subjected to the pressure difference force and its own gravity, and the valve body head 202a abuts against the valve port 10 a. In the electric valve in the state of fig. 4, there is an axial distance between the first spool abutment 202b and the second elastic member 208.

Fig. 5 is a sectional view of the valve body when the electrically operated valve of the present invention is opened until the head of the valve core just does not contact the valve port, and a partially enlarged view thereof. The position of the cartridge rotor assembly 20 in fig. 5 is open at a height above that of fig. 4, where the cartridge head 202a is just at the threshold of contacting and not contacting the valve port 10 a. The valve body 202 is supported by the second elastic member 208 under the action of the pressure difference between both ends of the valve port 10a and its own weight, the second elastic member 208 is deformed to a certain extent under the action of the gravity of the valve body 202 and the pressure difference between both ends of the valve body 202, and at this time, the first valve body abutting portion 202b abuts against the upper end of the second elastic member 208, the lower end of the second elastic member 208 abuts against the valve shaft abutting portion 20154, the third abutting portion 206c of the gasket member 2061 abuts against the step portion 20152, and the elastic force of the first elastic member 204 is borne by the step portion 20152 through the transmission of the gasket member 2061. The second spool abutment 202c is axially spaced from the second abutment 206b by an axial distance h, and h > 0.

With continued reference to fig. 5, when the third abutting portion 206c abuts against the step portion 20152 and the first spool abutting portion 202b abuts against the second elastic member 208, the second spool abutting portion 202c is axially distanced from the washer member 2061, the second spool abutting portion 202c is axially distanced from the second abutting portion 206b, the second spool abutting portion 202c does not abut against the washer member 2061, the elastic force of the first elastic member 204 is borne by the step portion 20152 through the washer member 2061, the second spool abutting portion 202c is not subjected to the elastic load of the first elastic member 204 through the transmission of the washer member 2061, that is, the spool 202 is not subjected to the elastic load of the first elastic member 204, and the spool 202 is supported by and suspended from the second elastic member 208.

Fig. 6 is a sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree, and a partially enlarged view thereof. When the spool rotor assembly 20 of the electric valve is opened from the position shown in fig. 5 to the position shown in fig. 6, the spool 202 is constantly subjected to the pressure difference between both ends of the port 10a and its own gravity, the first spool contact portion 202b is constantly abutted against the upper end portion of the second elastic member 208, and the elastic force of the first elastic member 204 is constantly borne by the step portion 20152 through the transmission of the gasket member 2061. With the rotor member 20 in the position shown in figure 6, the rotor member 20 is opened to its maximum open position in its normal operating condition.

The electric valve of the present application further includes a restricting portion 20b, the valve element 202 further includes a third valve element abutment portion 202d, the restricting portion 20b is capable of abutting against the third valve element abutment portion 202d, in the present embodiment, the third valve element abutment portion 202d is located at an upper end position of the valve element main body portion 2021, the third valve element abutment portion 202d is capable of abutting against the housing 30, the housing 30 includes a restricting portion 20b, and as shown in the electric valve shown in fig. 6, the valve element 202 is in contact with the housing 30 just before.

Fig. 7 is a sectional view of the valve body when the electric valve of the invention is opened to the state that the thread pair is unscrewed, and a partial enlarged view thereof. When the spool assembly 20 continues to open upward from the state shown in fig. 6, an excessively open state (an excessively open state: a state in which the spool assembly 20 has opened upward beyond its predetermined upper limit stroke) occurs, and as the spool assembly 20 continues to move upward, the second elastic member 208 is compressed, and in fig. 7, the amount of compression by which the second elastic member 208 is further compressed with respect to the state in fig. 6 is m, and the third spool abutment 202d abuts against the housing 30 (the restricting portion 20b), and the valve shaft assembly 201 is subjected to a downward elastic load by the second elastic member 208. If the valve core rotor assembly 20 is further opened excessively, the external thread portion 201a of the valve shaft assembly 201 is unscrewed from the internal thread portion 10b of the nut 102 (i.e., in the state shown in fig. 7), and after the unscrewing, the valve core rotor assembly 20 will not move upward any more, and if the coil 40 drives the valve core rotor assembly 20 in the direction in which the electric valve is closed, the valve shaft assembly 201 receives a downward elastic load of the second elastic member 208, and the screw pair is unscrewed when the valve core rotor assembly 20 rotates.

Referring to fig. 1, 4, 5 and 6, when the valve core rotor assembly 20 is opened from the fully closed state to the fully open state in fig. 4, or closed from the fully open state in fig. 6 to the state in fig. 4, the valve core 202 is not subjected to the spring force load of the first elastic member 204. Particularly, at the moment when the valve core head 202a contacts the valve port 10a, the valve core 202 is suspended on the second elastic element 208, and the valve core 202 is not subjected to the elastic load of the first elastic element 204, so that the impact force at the moment when the valve core head 202a contacts the valve port 10a can be reduced, thereby reducing the abrasion of the contact parts of the two and prolonging the service life of the electric valve; in addition, during this period, the friction force at the contact point between the valve element 202 and the valve port 10b (the friction force is related to the pressure of the valve element 202 against the valve port 10a) can be reduced, thereby reducing the wear of the valve element 202 and the valve port 10 b.

Referring to fig. 6, the structural feature of this embodiment that can achieve the above-mentioned functional effects is that when the washer member 2061 abuts against the step 20152, the valve body 202 does not abut against the valve port 10a, and the valve body 202 is supported and suspended by the second elastic member 208, the second valve body abutting portion 202c is axially spaced from the second abutting portion 206b of the washer member 2061 by an axial distance h. Because the electric valve has certain opening travel, the preferred h is less than 0.3 mm.

Fig. 8 is a sectional view of the valve body of the electric valve according to the second embodiment of the present invention, which is opened to the maximum opening, and a partially enlarged view thereof. Compared with the first embodiment shown in fig. 6 in the same opening degree state, the present embodiment is mainly different in that the valve body 202 is integrally formed, and the valve body 202 is inserted from the central through hole of the valve shaft 2011 from top to bottom, and in the present embodiment, it is still satisfied that the axial distance h exists between the second valve body abutment portion 202c and the second abutment portion 206b of the washer member 2061 when the washer member 2061 abuts against the step portion 20152, the valve body 202 does not abut against the valve port 10a, and the valve body 202 is supported and suspended by the second elastic member 208.

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

The contact member 206 according to the present embodiment includes a contact holder 2062, the contact holder 2062 can be contacted with the valve shaft contact portion 20154, the contact holder 2062 has a substantially cylindrical structure, and includes a contact holder top portion 20621 located at the top and a contact holder side portion 20622 formed to extend downward substantially along the circumferential edge of the contact holder top portion 20621, and the contact holder side portion 20622 is hollow.

The contact bracket 2062 further includes a contact bracket hole portion 20623, the contact bracket hole portion 20623 penetrates upper and lower surfaces of the contact bracket top portion 20621, and the upper end of the spool 202 penetrates the contact bracket hole portion 20623, the first elastic member 204, and the bushing hole portion 20121.

In the present embodiment, the step 2015 may not be provided on the valve shaft inner wall 2015, specifically, when the electric valve is in the state shown in fig. 9, the valve body 202 is supported and suspended by the second elastic member 208, the first valve body abutment portion 202b abuts against the second elastic member 208, the abutment holder 2062 is externally fitted on the valve body 202, and the lower end of the abutment holder side portion 20622 of the abutment holder 2062 abuts against the valve shaft abutment portion 20154 (so the step 20152 may not be provided, and the function of the step 20152 is realized by the valve shaft abutment portion 20154), in the present embodiment, the abutment holder 2062 includes the third abutment portion 206c (a portion abutting against the valve shaft abutment portion 20154), and the abutment holder top 20621 abuts against the first elastic member 204, and the abutment holder 2062 includes the first abutment portion 206a, in the present embodiment, when the abutment holder 2062 abuts against the valve shaft abutment portion 20154, the valve body 202 does not abut against the valve port 10a, and the valve body 202 is suspended and supported by the second elastic member 208, the second spool abutment 202c is axially spaced from the lower surface of the abutment shelf top 20621 by an axial distance h.

When the valve body 202 is raised by a distance h with respect to the valve shaft assembly 201, the lower end surface of the abutment holder top 20621 contacts the second valve body abutment 202c, the first valve body abutment 202b does not abut against the second elastic member 208, when the valve body 202 is further raised with respect to the valve shaft assembly 201, the second abutment 206b of the abutment holder 2062 abuts against the second valve body abutment 202c, the valve body 202 receives the elastic load of the first elastic member 204 through transmission of the abutment holder 2062, and at this time, the elastic force of the first elastic member 204 can be transmitted to the valve port 10a through the valve body 202, and the pressing force between the valve body 202 and the valve port 10a is generated.

Of course, in the present embodiment, the step 20152 is not necessarily provided, but in the present embodiment, the step 20152 is not necessarily provided, and for example, the step 20152 may be provided on the valve shaft inner wall 2015, and the step 20152 may abut against the lower end of the abutment side 20622, and in this case, the technical effect of the present invention can be achieved.

Fig. 10 is a sectional view of a valve body of a motor-operated valve according to a fourth embodiment of the present invention, which is opened to a maximum opening degree, and a partially enlarged view thereof.

In the present embodiment, the valve shaft assembly 201 includes a valve shaft body 2013 and a tubular member 2014, the valve shaft body 2013 has a through hole penetrating vertically, the valve shaft body 2013 is provided with a male screw portion 201a, the valve shaft body 2013 and the tubular member 2014 are fixedly connected, and a valve shaft inner wall portion 2015 is formed in a substantially inner wall region of the central through hole after the both are fixedly connected, in the present embodiment, an upper end portion of the valve shaft body 2013 extends into the through hole of the tubular member 2014 (of course, the valve shaft body 2013 may be fixed to the lower end of the tubular member 2014 without extending into the through hole of the tubular member 2014). The barrel 2014 is substantially hollow and cylindrical, the barrel 2014 includes a barrel contact 20141, the barrel contact 20141 abuts against the first elastic piece 204, the barrel contact 20141 includes a spring contact 20a, and a barrel through hole 201411 is provided substantially in the center of the barrel contact 20141. The upper end surface of the valve shaft main body 2013 forms a valve shaft abutment 20154, and the first elastic member 204 is accommodated in a space defined by the cylindrical member 2014 and the valve shaft main body 2013.

Compared with the third embodiment shown in fig. 9 in the same opening state, the present embodiment corresponds to the third embodiment in which the structure of the valve shaft assembly 201 is divided and integrated. The geometrically corresponding parts of the assembled parts have the same function. The structure of other parts of this embodiment is the same as or similar to that of the third embodiment.

It is to be noted that, in the present embodiment, the components of the electric valve may be conventionally separated, integrated, etc., but the functions of the geometric corresponding parts of the assembled electric valve are basically the same, and the present invention still belongs to the idea of the present invention, for example, the structure of the valve core 202 in fig. 8 is changed to a certain extent compared with the structure of the valve core 202 in the first embodiment in fig. 6, but the functions of the geometric corresponding parts of the valve core 202 are not substantially changed, and the structures of these adaptive changes and combinations also fall within the protection scope of the present invention.

Note that in the embodiments described in the present specification, a washer may be added to the lower end portion of the first elastic member 204, a washer may be added between the first valve body abutment portion 202b and the second elastic member 208, or a washer may be added to the upper end portion of the first elastic member 204, and the two members of the present application may be abutted against each other, including two members directly abutted against each other or a pair of members abutted against each other via another member (not limited to a washer), without affecting the core content of the present application.

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

"counterbalance" that this application said both includes that two spare parts directly counterbalance, also includes between two spare parts through other spare parts counterbalance, promptly indirectly counterbalance.

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.

In the above embodiment, the third valve element contact portion 202d of the valve element 202 is configured to contact the housing 30, and the housing 30 includes the restricting portion 20d, but of course, a housing connection member may be welded to the housing 30, and the valve element 202 may contact the housing connection member, and in this case, the member contacting the valve element 202 is the restricting portion 20 d. That is, the restricting portion 20d of the present invention is a member that can abut against the top spool 202, and is not limited to the case 30.

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

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 have been described 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, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (12)

1. The 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 seat part (10) and a valve core rotor assembly (20), and the valve core rotor assembly (20) comprises a valve shaft assembly (201), a valve core (202), a first elastic piece (204), an abutting part (206) and a second elastic piece (208);

the valve shaft assembly (201) comprises a valve shaft abutting part (20154), and the second elastic piece (208) is supported by the valve shaft abutting part (20154);

the valve core (202) is arranged in the valve shaft assembly (201) in a penetrating mode, the valve core (202) comprises a first valve core abutting part (202b), and the first valve core abutting part (202b) can abut against the upper end part of the second elastic piece (208);

an upper end portion of the first elastic member (204) abuts against the valve shaft assembly (201), the abutting member (206) includes a first abutting portion (206a), a lower end portion of the first elastic member (204) abuts against the first abutting portion (206a), the abutting member (206) includes a second abutting portion (206b), the valve body (202) includes a second valve body abutting portion (202c), the second abutting portion (206b) is capable of abutting against the second valve body abutting portion (202c), the abutting member (206) includes a third abutting portion (206c), and the third abutting portion (206c) is capable of abutting against the valve shaft assembly (201);

the valve seat component (10) comprises a valve port (10a), and the valve core (202) can be abutted against the valve port (10 a);

when the third abutment (206c) abuts against the valve shaft assembly (201) and the first spool abutment (202b) abuts against the upper end of the second elastic member (208), the second abutment (206b) and the second spool abutment (202c) do not abut against each other.

2. The electrically operated valve according to claim 1, characterized in that the abutment member (206) comprises a washer member (2061), the valve shaft inner wall portion (2015) comprises a step portion (20152), the washer member (2061) abuts against the first elastic member (204), the washer member (2061) comprises the first abutment portion (206a), the washer member (2061) can abut against the second spool abutment portion (202c), the washer member (2061) comprises the second abutment portion (206b), the washer member (2061) can abut against the step portion (20152), and the washer member (2061) comprises the third abutment portion (206 c).

3. The electrically operated valve according to claim 2, characterised in that the washer part (2061) further comprises a washer bore portion (201611), the valve spool (202) passing through the washer bore portion (201611) and the first resilient member (204).

4. The electrically operated valve according to claim 1, wherein the abutment member (206) comprises an abutment shelf (2062), the abutment shelf (2062) comprises an abutment shelf top portion (20621) and an abutment shelf side portion (20622), the abutment shelf top portion (20621) abuts against the first elastic member (204), the abutment shelf top portion (20621) comprises the first abutment portion (206a), the abutment shelf top portion (20621) is capable of abutting against the second spool abutment portion (202c), the abutment shelf top portion (20621) comprises the second abutment portion (206b), the abutment shelf side portion (20622) is capable of abutting against the valve shaft assembly (201), and the abutment shelf side portion (20622) comprises the third abutment portion (206 c).

5. The electrically operated valve according to claim 4, wherein the abutment shelf side portion (20622) is capable of abutting against the valve shaft abutment portion (20154).

6. The electric valve according to any of the claims 4 or 5, wherein the abutment shelf (2062) comprises an abutment shelf hole portion (20623), the valve spool (202) passing through the abutment shelf hole portion (20623) and the first elastic member (204).

7. The electrically operated valve according to any one of claims 1 to 6, wherein the valve core (202) further comprises a valve core main body portion (2021) and a valve core sleeve (2022), the valve core sleeve (2022) comprises a valve core sleeve hole portion (20221), a portion of the valve core main body portion (2021) is located in the valve core sleeve hole portion (20221), and the valve core main body portion (2021) is fixedly connected with the valve core sleeve (2022).

8. The electrically operated valve according to claim 7, wherein the valve core sleeve (2022) is abuttable against an upper end portion of the second elastic member (208), the valve core sleeve (2022) includes the first valve core abutment portion (202b), the valve core sleeve (2022) is abuttable against the second abutment portion (206b), and the valve core sleeve (2022) includes the second valve core abutment portion (202 c).

9. The electric valve according to any one of claims 1 to 5, wherein the valve shaft assembly (201) comprises a valve shaft (2011) and a bushing (2012), the bushing (2012) is fixedly connected with the valve shaft (2011), the bushing (2012) abuts against the first elastic member (204), the bushing (2012) comprises a bushing hole portion (20121), and the valve core (202) passes through the bushing hole portion (20121).

10. The electric valve according to any one of claims 1 to 5, 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) is fixedly connected with the barrel (2014), the barrel (2014) comprises a barrel abutment portion (20141), the barrel abutment portion (20141) abuts against the first elastic member (204), the barrel (2014) further comprises a barrel through hole portion (201411), and the valve core (202) passes through the barrel through hole portion (201411).

11. The electric valve according to claim 10 or 11, characterized in that it comprises a restraining portion (20b) and a housing (30), in that the spool (202) comprises a third spool abutment (202d), in that the third spool abutment (202d) is abuttable against the housing (30), and in that the housing (30) comprises the restraining portion (20 b).

12. The electric valve according to claim 10 or 11, characterized in that it comprises a restricting portion (20b), an outer housing (30) and an outer housing connection, the outer housing connection being fixedly connected with the outer housing (30), the spool (202) comprising a third spool abutment (202d), the third spool abutment (202d) being able to abut against the outer housing connection, the outer housing connection comprising the restricting portion (20 d).

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