An electric valve

Abstract

14. The electric valve of claim 13, wherein the at least one valve element is mounted on a cam portion and the at least one valve element is mounted on the cam portion. The electric valve of claim 13, wherein the at least one valve element is mounted on a cam portion and the at least one valve element is mounted on the cam portion. The electric valve of claim 14, wherein the at least one valve element is mounted on a cam portion and the at least one valve element is mounted on the cam portion.

Description

Technical field

[0001] The present invention relates to the technical field of refrigeration control, and in particular to an electric valve. [Background Technology]

[0002] See Figure 9 CN109723884A discloses an electric valve having a guide bushing 20 and a valve shaft retainer 30. The guide bushing 20 is provided with an external threaded portion 23, and the valve shaft retainer 30 is provided with an internal threaded portion 33. The external threaded portion 23 and the internal threaded portion 33 constitute a threaded portion feeding mechanism 28 of the electric valve.

[0003] The electric valve also includes a fixed component 70, the outer periphery of which is sheathed with a restoring spring 75. When the valve shaft retainer 30 moves upward relative to the guide bushing 20, causing the threaded portion 23 of the guide bushing 20 and the threaded portion 33 of the valve shaft retainer 30 to become non-threaded, the restoring spring 75 is in a compressed state, and the valve shaft retainer is subjected to the downward spring force of the restoring spring 75. When the rotor component rotates in the reverse direction, the elastic force of the restoring spring 75 can cause the movable threaded portion 33 to be threaded again with the fixed threaded portion 23. [Summary of the invention]

[0004] The present invention aims to provide an electric valve, comprising a valve body and a coil, wherein the coil is sleeved on the valve body, the valve body comprising a valve core rotor assembly and a housing component, the valve core rotor assembly comprising a valve shaft assembly and an elastic member, and the housing component comprising a housing and a guide rod;

[0005] The housing is fixedly connected to the guide rod or formed as one piece;

[0006] The valve shaft assembly includes a channel portion, the elastic member is sleeved on the guide rod, and a portion of the guide rod is located in the channel portion;

[0007] The electric valve provided in the present application has a shell component fixedly connected to the guide rod or integrally formed, an elastic member is sleeved on the guide rod, part of the guide rod is located in the channel portion, and the elastic member basically will not detach from the guide rod.

Brief Description of the Drawings

[0008] Figure 1 is a cross-sectional view of the electric valve of the present invention in a fully closed state;

[0009] Figure 2 It is a structural schematic diagram of the valve seat component of the electric valve of the present invention;

[0010] Figure 3 1 is a structural diagram of the valve core rotor assembly of the electric valve of the present invention, and a partial enlarged cross-sectional view thereof;

[0011] Figure 4 This is a cross-sectional view of the valve body of the electric valve of the present invention when the valve core rotor assembly is about to reach the critical point of over-opening;

[0012] Figure 5 This is a cross-sectional view of the valve body of the electric valve of the present invention when the threaded pair of the valve core rotor assembly is over-opened and disengaged;

[0013] Figure 6 2 is a schematic structural diagram of a valve core rotor assembly according to a second embodiment of the present invention;

[0014] Figure 7 2 is a schematic structural diagram of a valve core rotor assembly according to a third embodiment of the present invention;

[0015] Figure 8 yes Figure 7 Schematic diagram of the structure of the middle reed.

[0016] Figure 9 It is a cross-sectional view of the electric valve in the background technology.

[0017] in, Figures 1-8 The following reference numerals are included:

[0018] 10 Valve seat component; 101 Valve seat; 102 Nut; 103 First connecting pipe portion; 104 Second connecting pipe portion; 10a Valve port; 10b Internal thread portion; 10c Fixed stop portion; 10d First inlet and outlet passage; 10e Second inlet and outlet passage; 20 Valve core rotor assembly; 201 Valve shaft assembly; 2011 Valve shaft; 2012 Bushing; 20121 Bushing hole portion; 2013 Valve shaft main body; 2014 Cylindrical member; 20141 Cylindrical member abutment portion; 201411 Cylindrical member through hole; 2015 Valve shaft inner wall portion; 20151 First valve shaft inner wall portion; 20152 Valve shaft abutment portion; 20153 Second valve Inner wall portion of the shaft; 2016 outer edge portion; 20161 first outer edge portion; 20162 second outer edge portion; 201a external thread portion; 201b movable stop portion; 201c rotor fixing portion; 202 valve core; 202a valve core head portion; 202b valve core abutment portion; 203 rotor; 204 second elastic member; 30 outer shell component; 302 guide rod; 3021 guide rod body portion; 3022 guide rod fixing portion; 208 elastic member; 2081 first spring; 2082 reed; 20821 reed through-hole portion; 20822 reed support portion; 20a spring abutment portion; 20c channel portion; 40 coil. [Specific implementation method]

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Please refer to Figures 1 to 5 ,in, Figure 1is a cross-sectional view of the electric valve of the present invention in a fully closed state; Figure 2 It is a structural schematic diagram of the valve seat component of the electric valve of the present invention; Figure 3 1 is a structural diagram of the valve core rotor assembly of the electric valve of the present invention, and a partial enlarged cross-sectional view thereof; Figure 4 This is a cross-sectional view of the valve body of the electric valve of the present invention when the valve core rotor assembly is about to reach the critical point of over-opening; Figure 5 This is a cross-sectional view of the valve body of the electric valve of the present invention when the threaded pair of the valve core rotor assembly is over-opened and disengaged;

[0021] Please refer to Figure 1 , Figure 1 This is a cross-sectional view of the first embodiment of the electric valve provided by the present invention in a fully closed state. In one specific embodiment, the electric valve provided by the present invention includes a valve body and a coil 40, which is sleeved on the valve body. The valve body includes a valve core rotor assembly 20, a valve seat component 10, and a housing component 30. The stator coil 40 of the electric valve is connected to a drive controller. When the drive controller is energized, it sends a pulse drive signal to the coil 40, generating a changing magnetic field, thereby driving the valve core rotor assembly 20 of the electric valve to rotate in the forward or reverse direction. The valve core rotor assembly 20 includes a valve shaft assembly 201. In the present embodiment, the valve shaft assembly 201 includes a valve shaft 2011, which is provided with an external threaded portion 201a. The valve seat component 10 includes a nut 102, and the inner hole of the nut 102 is provided with an internal threaded portion 10b. The valve shaft 2011 is threadedly matched with the nut 102 (hereinafter referred to as screwing). When the valve core rotor assembly 20 rotates, the valve shaft 2011 will displace along the axial direction, thereby driving the valve core 202 to realize the opening and closing action of the valve port 10a.

[0022] See Figure 1 , is a cross-sectional view of the electric valve of the present invention in a fully closed state. Figure 2 、 Figure 3 The electric valve of the present invention includes a valve body and a coil 40, wherein the valve body includes a valve seat component 10 ( Figure 2 As shown), valve core rotor assembly 20 ( Figure 3 shown) and housing component 30.

[0023] The valve seat component 10 has a valve port 10a, and a first inlet and outlet channel 10d and a second inlet and outlet channel 10e. The valve port 10a can be connected to the first inlet and outlet channel 10d and the second inlet and outlet channel 10e to allow a fluid medium (such as a refrigerant) to pass through. In addition, a through hole extending vertically is provided at the approximate center of the valve seat component 10, and an internal threaded portion 10b is provided in the through hole. In this embodiment, the valve seat component 10 includes a nut 102, the nut 102 includes the through hole, and an internal threaded portion 10b is also provided in the through hole of the nut 102. The valve seat component 10 also 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, by using a connector as an insert and integrally injection molding with the nut 102, and then welding the connector to the valve seat 101). The nut 102 and the valve seat 101 are fixedly connected by welding or press-fitting, or the nut 102 and the valve seat 101 are press-fitted and fixed. In this embodiment, the nut 102 and the valve seat 101 are fixed by welding the connector to the valve seat 101 to achieve fixed connection between the two). Of course, the nut 102 and the valve seat 101 can also be integrally formed, and the valve seat 101 is integrally formed with a valve port 10a (of course, the valve port 10a can also be formed in other components, and then the component is fixedly connected to the valve seat 10a). In addition, in this embodiment, the valve seat 101 is fixedly connected to the first connecting pipe portion 103 and the second connecting pipe portion 104. The first connecting pipe portion 103 and the second connecting pipe portion 104 serve as inflow or outflow channels for the fluid medium of the electric valve, and are generally used to connect to the system pipeline when it is installed in a cooling or heating system such as an air conditioner.

[0024] In this embodiment, the first connecting portion 103 and the second connecting portion 104 are welded to the valve seat 101. Of course, the first connecting portion 103 and the second connecting portion 104 may be omitted, and the flow path for the refrigerant fluid may be directly provided on the valve seat 101. Alternatively, the first connecting portion 103 or the second connecting portion 104 may be sealed with a flange, for example, in applications where the electric valve is used in automotive air conditioners, heat pumps, and other applications requiring rapid maintenance. In this embodiment, the first connecting portion 103 and the second connecting portion 104 are provided as an example.

[0025] Please refer to Figure 3 The valve core rotor assembly 20 also includes a rotor 203 and a valve core 202. The rotor 203 has magnetic poles in the circumferential direction. The approximately lower outer edge section of the valve shaft 2011 is provided with an external threaded portion 201a. The valve core 202 is passed through the central through hole of the valve shaft 2011. In addition, the valve core rotor assembly 20 also includes a second elastic member 204 arranged in the first valve shaft inner wall portion 20151 at the center of the valve shaft 2011. The valve shaft assembly 201 also includes a sleeve 2012 fixedly connected to the approximately upper end position of the valve shaft 2011.

[0026] The electric valve provided in this embodiment includes a spring abutment portion 20a, which is roughly the part where the valve shaft assembly 201 and the second elastic member 204 abut (including direct abutment or indirect abutment, for example, when a gasket or washer and other components are provided between the bushing 2012 and the second elastic member 204, the bushing 2012 is still subjected to the elastic load of the second elastic member 204, so at this time the valve shaft assembly 201 and the second elastic member 204 are still abutted). In this embodiment, the bushing 2012 abuts against the second elastic member 204, and the bushing 2012 includes a spring abutment portion 20a.

[0027] In addition, the electric valve provided in this embodiment also includes a shell component 30, which includes a shell 301 with an opening at one end. The shell 301 is a thin-walled part in the shape of a cover. The lower open side of the shell 301 is tightly welded to the valve seat component 10, thereby forming a accommodating chamber that can accommodate the upper half of the nut 102 and the main part of the valve core rotor assembly 20.

[0028] The housing component 30 further includes a guide rod 302 , which is fixedly connected to the housing 301 or integrally formed therewith.

[0029] A vertically extending hole is formed approximately at the center of the nut 102 in the valve seat component 10. An internally threaded portion 10b (also known as a fixed threaded portion) is disposed approximately mid-lower within the hole. This internally threaded portion 10b, in combination with an externally threaded portion 201a (also known as a movable threaded portion) disposed approximately below the valve shaft 2011, constitutes the screw feed mechanism (thread pair) of the electric valve. A fixed stopper 10c protrudes from the annular base of the nut 102. This stopper, in conjunction with a movable stopper 201b disposed on the valve core rotor assembly 20, forms the stopper mechanism at the lower end of the valve's travel. (That is, when the valve core rotor assembly 20 moves downwardly relative to the valve seat component 10 to a certain extent, the movable stopper 201b abuts against the fixed stopper 10c, limiting rotation of the valve core rotor assembly 20 relative to the valve seat component 10 and thereby restricting further downward axial movement of the valve core rotor assembly 20.) When the valve core rotor assembly 20 rotates downward to the lowest end of its stroke, the movable stop portion 201b contacts the corresponding mating surface of the fixed stop portion 10c, thereby controlling the downward movement of the valve core rotor assembly 20.

[0030] The coil 40 of the electric valve receives the driving pulse signal to generate a changing magnetic field, and the rotor 203 in the valve body is excited to rotate. In this embodiment, the valve shaft 2011 is fixedly connected to the rotor 203, so the valve shaft 2011 will rotate synchronously with the rotor 203. The spiral feed mechanism of the valve shaft 2011 and the nut 102 can convert the rotational motion of the rotor 203 into axial movement, thereby driving the valve core 202 so that its valve core head 202a approaches or moves away from the valve port 10a, thereby realizing the linear switching adjustment function of the electric valve flow.

[0031] See Figure 3 , is a schematic diagram of the structure of the valve core rotor assembly of the electric valve of the present invention. The valve core rotor assembly 20 of the electric valve comprises a rotor 203 with magnetic poles in the circumferential direction, a valve shaft 2011 fixedly connected to the rotor 203, a valve core 202 inserted into the central through hole of the valve shaft 2011, a second elastic member 204 disposed within a first valve shaft inner wall portion 20151 (described below) at the center of the valve shaft 2011, and a bushing 2012 fixedly connected to the upper end of the valve shaft 2011.

[0032] In this embodiment, the valve shaft 2011 includes a hole that passes through the upper and lower parts, and the inner wall of the through hole roughly forms a valve shaft inner wall portion 2015. In the axial direction of the valve shaft 2011, the inner diameter of the valve shaft inner wall portion 2015 is not the same. Specifically, the valve shaft inner wall portion 2015 includes a first valve shaft inner wall portion 20151, a valve shaft abutment 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 the plane where the cross section of the valve shaft 2011 is located, the first valve shaft inner wall portion 20151 is located along the orthographic projection of the plane (the orthographic projection is a closed line or annulus) In addition to the orthographic projection of the two valve shaft inner wall portions 20153 along the plane (the orthographic projection is a closed line or annulus), for the convenience of processing and manufacturing, the cross-sections of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 are usually set to be circular. At this time, 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 this embodiment, the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 are of equal diameter in the height direction. Therefore, the orthographic projections of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 along the plane where the cross section of the valve shaft 2011 is located are also circular.

[0033] In addition, the valve shaft abutment portion 20152 has an extension distance in the horizontal direction, the outer edge of the valve shaft abutment portion 20152 intersects with the first valve shaft inner wall portion 20151, and the inner edge of the valve shaft abutment portion 20152 intersects with the second valve shaft inner wall portion 20153. When the cross-sections of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 are both set to be circular, the orthographic projection of the valve shaft abutment portion 20152 along the plane where the cross section of the valve shaft 2011 is located is a circular ring. In this embodiment, the valve shaft abutment portion 20152 is horizontal. Of course, the valve shaft abutment portion 20152 can also be set to a non-completely horizontal form. For example, in the direction away from the center of the valve shaft abutment portion 20152, the valve shaft abutment portion 20152 gradually extends upward or downward. It can be understood that the valve shaft abutment portion 20152 only needs to satisfy that the valve shaft abutment portion 20152 has an extension distance in the horizontal direction.

[0034] Of course, the above describes the structure of a first valve shaft inner wall portion 20151, a valve shaft abutment portion 20152, and a 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 of the present invention are not limited to the above structure. It is only necessary to satisfy that there is a valve shaft abutment portion 20152 with an extended distance in the horizontal direction 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 the valve shaft assembly 201.

[0035] In addition, in the present 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. The first outer edge portion 20161 is located above the second outer edge portion 20162. In the plane where the cross section of the valve shaft 2011 is located, the orthographic projection of the first outer edge portion 20161 along the plane is located on the periphery of the orthographic projection of the second outer edge portion 20162 along the plane. For the convenience of processing, the cross sections of the first outer edge portion 20161 and the second outer edge portion 20162 are both set to be circular. A rotor fixing portion 201c is provided on the portion of the valve shaft 2011 where an outer edge portion 20161 is located. The rotor 203 and the valve shaft fixing portion 201b can be fixed by direct or indirect welding, riveting, injection molding of magnetic plastic material, gluing, etc. In this embodiment, the connecting piece is injection-molded with the magnetic plastic material as an insert, and then the valve shaft 2011 and the connecting piece are fixedly connected by welding. When the rotor 203 and the valve shaft 2011 are directly connected, the valve shaft 2011 can also be injection-molded with the magnetic plastic material as an insert.

[0036] An external threaded portion 201a is provided at the position of the valve shaft 2011 where the second outer edge portion 20162 is located. The external threaded portion 201a (also called a movable threaded portion) and the internal threaded portion 10b (also called a fixed threaded portion) provided at the inner hole of the nut 102 are combined to constitute the spiral feed mechanism (thread pair) of this electric valve.

[0037] In this embodiment, the valve shaft assembly 201 also includes a bushing 2012. In this embodiment, the bushing 2012 is located in the inner wall portion 20151 of the first valve shaft. The bushing 2012 is fixedly connected to the valve shaft 2011 by pressing or welding. The bushing 2012 also includes a bushing hole portion 20121, which passes through the upper and lower surfaces of the bushing 2012.

[0038] The valve shaft assembly 201 provided by the present invention also includes a channel portion 20c, and the guide rod 302 can pass through the channel portion 20c. During the process of the valve shaft assembly 201 rising or falling relative to the guide rod 302, the guide rod 302 can guide and correct the valve shaft assembly 201 by cooperating with the channel portion 20c.

[0039] In this embodiment, the electric valve further includes an elastic member 208, which is capable of abutting against the bushing 2012 or the valve shaft 2011. The elastic member 208 includes an elastic member inner edge portion 208a. In this embodiment, the elastic member 208 is a first spring 2081, the inner edge of which forms the elastic member inner edge portion 208a. The first spring 2081 is sleeved on the guide rod 302. In this embodiment, the guide rod 302 is fixedly connected to the housing 301. Specifically, the guide rod 302 includes a guide rod body portion 3021 and a guide rod fixing portion 3022. The guide rod fixing portion 3022 generally connects the guide rod to the housing 30. The guide rod fixing portion 3022 is fixedly connected to the housing 301 , and the lower end of the guide rod 302 passes through the bushing hole 20121 , so that the guide rod 302 is located in the bushing hole 20121 (channel portion 20c ), and the guide rod 302 is passed through the first spring 2081 .

[0040] Therefore, in this embodiment, the bushing hole portion 20121 includes the channel portion 20c.

[0041] In this embodiment, the valve core 202 is inserted into the inner wall portion 2015 of the valve shaft (part of the valve core 202 is located in the inner wall portion 2015 of the valve shaft). In addition, the valve core 202 has a stepped shaft structure, which includes a valve core head 202a, which is located at the approximate lower end position of the valve core 202. The tip shape of the valve core head 202a is related to the flow regulation curve required by the electric valve. The valve core 202 also includes a valve core abutment 202b, which is located approximately near the upper end or upper end position of the valve core 202. In the plane where the cross section of the valve core 202 is located, the orthographic projection of the valve core head 202a along the plane is located and is located within the orthographic projection of the valve core abutment 202b along the plane. In this embodiment, the cross sections of the valve core head 202a and the valve core abutment 202b are both circular, so the inner diameter of the valve core abutment 202b is larger than the diameter of the valve core head 202a. In this embodiment, the valve core 202 is inserted into the valve shaft inner wall portion 2015 of the valve shaft 2011 from the top down, and its valve core abutting portion 202b can abut against the valve shaft abutting portion 20152, and its valve core head portion 202a extends from the lower end of the second valve shaft inner wall portion 20153. In the plane where the cross section of the valve core 202 is located, the orthographic projection of the valve core abutting portion 202b along this plane overlaps with the orthographic projection of the valve shaft abutting portion 20152 along this plane. Therefore, the valve core abutting portion 202b can abut against the valve shaft abutting portion 20152 (of course, when a gasket or other component is provided between the valve shaft abutting portion 20152 and the valve core abutting portion 202b so that they do not directly abut each other, the projection relationship between the valve core abutting portion 202b and the valve shaft abutting portion 20152 may not satisfy the above relationship). In this embodiment, the outer edge of the valve core abutment portion 202b and the inner edge of the first valve shaft inner wall portion 20151 are both circular, and the outer diameter of the valve core abutment portion 202b is slightly smaller than the inner diameter of the first valve shaft inner wall portion 20151 of the valve shaft, the outer diameter of the valve core abutment portion 202b is larger than the inner diameter of the second valve shaft inner wall portion 20153, and the outer diameter of the valve core head portion 202a at the largest point is slightly smaller than the inner diameter of the second valve shaft inner wall portion 20153. At this time, the valve core 202 can be supported on the valve shaft abutment portion 20152 of the valve shaft 2011.

[0042] In addition, the valve core rotor assembly 20 of the electric valve of this embodiment further includes a second elastic member 204 . The second elastic member 204 can be designed as a cylindrical coil spring. The second elastic member 204 is located in the inner wall portion 20151 of the first valve shaft.

[0043] The lower end of the second elastic member 204 is against the valve core 202, and the upper end of the second elastic member 204 is against the bushing 2012 (including direct offset or indirect offset, for example, when a gasket or other components are provided between the bushing 2012 and the second elastic member 204, the elastic force of the second elastic member 204 can be transmitted to the bushing 2012 through the gasket or other components, and at this time the second elastic member 204 and the bushing 2012 are indirectly offset).

[0044] See Figure 4 , is a cross-sectional view of the valve body of the electric valve core rotor assembly of the present invention when it is opened to a state where the first spring is about to be compressed.

[0045] Figure 4 The valve core rotor assembly 20 is in a state of being about to be over-opened (over-opening state: refers to the state when the valve core rotor assembly 20 is opened upward and exceeds its specified upper limit stroke). Figure 1 The valve core rotor assembly 20 is in the fully closed position, and the valve core head 202a is at the position closest to the valve port 10a. Figure 1 The middle guide rod 302 is located in the bushing hole. Figure 4 The valve core head 202a is already in a position away from the valve port 10a. At this time, the external threaded portion 201a of the valve shaft 2011 is still in a threaded state with the internal threaded portion 10b of the nut 102 for a certain length (see the length marked as L in the figure). Figure 1 The state in Figure 4 The guide rod 302 further extends into the bushing hole 20121. During the process of the valve shaft assembly 201 rising relative to the guide rod 302, the guide rod 302 can guide the valve shaft assembly 201 (for example, when the valve shaft assembly 201 wants to deviate relative to the axis of the electric valve, the valve shaft assembly 201 can contact the guide rod 302 to limit the further deviation of the valve shaft assembly 201). At this time, the first spring 2081 is still in its free length state, and the upper end surface of the first spring 2081 just contacts the housing 301.

[0046] See Figure 5 , is a cross-sectional view of the valve body when the valve core rotor assembly of the electric valve of the present invention is over-opened (the threaded pair is disengaged). Figure 5 The valve core rotor assembly 20 is relative to Figure 4 The position shown in the figure continues to move upwards for a stroke height of L. At this time, the movable threaded portion 201a of the valve shaft 2011 and the fixed threaded portion 10b of the nut 102 are just disengaged from each other, and the first spring 2081 is relatively Figure 4 The state in the state is further compressed by an amount L. During this process, the guide rod 302 can also limit the displacement of the first spring 2081 (during the contraction of the first spring 2081, the guide rod 302 can guide the first spring 2081). The first spring 2081 is compressed to generate elastic force, and the downward elastic force is finally transmitted to the valve shaft assembly 201, that is, the valve shaft assembly 201 is subjected to the downward elastic pressing force of the first spring 2081.

[0047] If the valve core rotor assembly 20 continues to rotate in the opening direction, the valve core rotor assembly 20 will no longer continue to rise relative to the nut 102 because the thread pair has disengaged; when the valve core rotor assembly 20 is driven by the coil 40 to rotate downward in the valve closing direction, because the valve shaft 2011 is subjected to the downward spring compression force of the first spring 2081, the external threaded portion 201a and the internal threaded portion 10b will be re-engaged, causing the valve core rotor assembly 20 to rotate and move downward.

[0048] In the electric valve of this solution, the first spring 2081 is sleeved on the guide rod 302, and the guide rod 2081 is inserted into the bushing hole 20121, which can limit the displacement of the first spring 2081. The first spring 2081 is relatively stable in the electric valve, and can also limit the displacement of the valve shaft assembly 201 when the valve shaft assembly 201 moves up and down relative to the guide rod 302. The valve shaft assembly 201 has good coaxiality with the axis of the electric valve during the up and down movement.

[0049] Combine Figure 1 、 Figure 4 and Figure 5 From the above, it can be seen that in this embodiment, the first spring 2081 is always mounted on the outer edge of the guide rod 302. No matter what opening state the electric valve is in, there is basically no risk of failure of the first spring 2081 being dislodged or shifted, and the first spring 2081 is not easily twisted or deflected.

[0050] See Figure 6 , is a structural diagram of the valve core rotor assembly of the second embodiment of the present invention. Figure 3Compared with the first embodiment in the embodiment, the structure of the valve shaft assembly 201 is re-divided and re-integrated based on the first embodiment. In this embodiment, the valve shaft assembly 201 includes a valve shaft body 2013 and a cylindrical member 2014. The valve shaft body 2013 has a through hole extending vertically therethrough. The valve shaft body 2013 is provided with an external threaded portion 201a (also referred to as a movable threaded portion). The valve shaft body 2013 is fixedly connected to the cylindrical member 2014. The central through hole after the fixed connection forms a valve shaft inner wall portion 2015. In this embodiment, a portion of the valve shaft body 2013 is located within the through hole of the cylindrical member 2014. Of course, the valve shaft body 2013 can also be fixed to the lower end of the cylindrical member 2014 without entering the through hole of the cylindrical member 2014. The cylindrical member 2014 is roughly in the shape of a hollow cylinder. The cylindrical member 2014 includes a cylindrical member abutting portion 2041, which abuts against the second elastic member 204. At this time, the cylindrical member abutting portion includes a spring abutting portion 20a. A cylindrical member through hole 201411 is provided at the approximate center position of the cylindrical member abutting portion 2041. In the plane where the cross section of the valve shaft assembly 201 is located, the cylindrical member through hole 201411 is located outside the orthographic projection of the guide rod body 3021 along the plane. In this embodiment, the outer edge cross-sections of the cylindrical member through hole 201411 and the guide rod body 3021 are both circular. Therefore, the diameter of the cylindrical member through hole 201411 is larger than the diameter of the guide rod body 3021. At this time, the cylindrical member through hole 201411 includes a channel portion 20c. The upper end surface of the valve shaft main body 2013 forms a valve shaft abutment portion 20152, the inner hole wall of the valve shaft assembly 201 located on the valve shaft abutment portion 20152 forms a first valve shaft inner wall portion 20151, and the inner hole wall located below the valve shaft abutment portion 20152 forms a second valve shaft inner wall portion 20152, the valve core abutment portion 202b and the second elastic member 204 are accommodated in the space defined by the cylindrical member 2014 and the valve shaft main body 2013, and the guide rod body portion 3021 of the guide rod 302 extends from the cylindrical member hole portion 201411 and is partially located in the cylindrical member hole portion 201411.

[0051] This embodiment and Figure 3 Compared with the first embodiment in the embodiment, the structure of the valve shaft assembly 201 is re-divided and integrated based on the first embodiment, and the functions of the geometrically corresponding parts after assembly are the same. The structural scheme of other parts of this embodiment is the same or similar to that of the first embodiment.

[0052] This embodiment is intended to illustrate that some components of the electric valve can be subjected to conventional separation, integration and other changes, but the functions of their geometrically corresponding parts after assembly are basically the same, which still falls within the concept of the present invention.

[0053] See Figure 7, is a structural diagram of the valve core rotor assembly of the third embodiment of the present invention. Figure 5 Compared with the first embodiment, the difference lies in the structure of the elastic member 208. Figure 8 The elastic member 208 of this embodiment is a spring 2082. This embodiment adopts a spring 2082 structure with elasticity, which can also play the same elastic pre-tightening and restoring role.

[0054] Figure 7 As shown in the figure, the movable threaded portion 201a of the valve shaft 2022 and the fixed threaded portion 10b of the nut 102 are just disengaged, and the reed 2082 is compressed. The compression of the reed 2082 generates an elastic force, which is ultimately transmitted to the valve shaft 2011. This means that the valve shaft assembly 201 is subjected to the downward elastic compressive force of the reed 2082. If the valve core rotor assembly 20 continues to rotate in the over-opening direction, the valve core rotor assembly 20 will not rise further because the thread pair has disengaged. When the valve core rotor assembly 20, driven by the driving force of the coil 40, rotates downward in the valve closing direction, the downward elastic compressive force of the reed 2082 on the valve shaft 2011 causes the external thread 201a and the internal thread 10b to reengage. In this embodiment, the reed 2082 is sleeved on the outer edge of the guide rod 302 through its center hole. No matter what opening state the electric valve is in, the reed 2082 will basically not escape or shift from the guide rod 302.

[0055] Specifically, the reed 2082 can be made of a thin-walled, elastic metal material. A reed through-hole 20821 is centrally located within the reed 2082, along which a plurality of reed support portions 20822 (typically three or more) are spaced apart circumferentially. The reed through-hole 20821 includes an elastic member hole 208a. When the valve shaft assembly 201 ascends or descends relative to the guide rod 302, the guide rod 302 passes through the reed through-hole 20821 and into the bushing hole 20121. The bushing hole 20121, in concert with the guide rod 302, guides and aligns the valve shaft assembly 201.

[0056] When the valve shaft assembly 201 moves upward relative to the valve seat component 10 to a certain stage, the reed support portion 20822 will contact the outer shell component 30. This is the critical point where the reed 2082 and the outer shell 301 are against each other. If the valve shaft assembly 201 continues to move upward relative to the valve seat component 10, the reed support portion 20822 will be against the top wall of the outer shell 31. The reed support portion 20822 moves radially under the action of force. The reed support portion 20822 is against the outer shell 301, and the lower end of the reed 2082 is against the valve shaft assembly 201. The reed 2082 applies a downward elastic force to the valve shaft assembly 201.

[0057] When the valve shaft assembly 201 abuts against the reed 2082 , the reed support portion 20822 moves radially thereof, and the valve shaft assembly 201 can further move toward the direction approaching the reed 2082 . The reed 2082 also applies a downward elastic force to the valve shaft assembly 201 .

[0058] It is worth noting that the guide rod 302 can be integrally formed with the shell 301. In addition, the shell 301 of the present invention is not limited to an integrated form. For example, the top of the shell 301 and the side of the shell 301 can be processed separately and then the two are fixedly connected. In this case, the guide rod 302 can also be integrally formed with the top of the shell 301.

[0059] Furthermore, it should be noted that in the embodiments shown in this specification, the addition of a gasket or washer to the lower end of the second elastic member 204, the provision of a gasket between the valve core abutment portion 202b and the valve shaft abutment portion 20152, or the addition of a gasket to the upper end of the second elastic member 204 does not affect the core content of this application. The two components of this application offset each other, including the two components directly offsetting each other or the two components offsetting each other through other components. Furthermore, in order to further reduce the frictional resistance of relative rotation, the upper and lower surfaces of the gaskets subjected to rotational friction can be sprayed or plated with a coating having lubricating and wear-resistant properties (e.g., a coating containing polytetrafluoroethylene, graphite, or molybdenum disulfide), thereby increasing the service life of the electric valve.

[0060] Based on the above embodiments, by utilizing the core structure of the present invention, some adaptive changes in adding friction-reducing washers or gaskets should fall within the scope of protection of the patent claims of the present invention.

[0061] It is worth noting that, regarding the above-mentioned formation method of the valve port 10a and whether to set up a connecting pipe, this solution provides multiple solutions, and the word "can" is used in the specification. Therefore, it can be understood that the "can" mentioned in this application cannot be understood as "must".

[0062] In addition, based on the above embodiments, the valve core 202, valve shaft assembly 201 and other components are assembled in a split manner, or mechanically divided at different positions, without substantially changing the functions of their geometrically corresponding parts. These adaptively changed and combined structures should also fall within the scope of protection of the patent claims of this invention.

[0063] It should be noted that the directional nouns such as up, down, left, and right mentioned in this embodiment are all based on the drawings in the specification and are introduced for the convenience of description; and the ordinal numbers such as "first" and "second" in the component names are also introduced for the convenience of description and do not mean any limitation on any order of the components.

[0064] The above describes the electric valve provided by the present invention in detail. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An electric valve, characterized in that: The invention comprises 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 member (208), and the shell component (30) comprises a shell (301) and a guide rod (302); The housing (301) and the guide rod (302) are fixedly connected or integrally formed; The valve shaft assembly (201) includes a channel portion (20c), the elastic member (208) is sleeved on the guide rod (302), and a portion of the guide rod (302) is located in the channel portion (20c); The valve body also includes a valve seat component (10), the valve seat component (10) includes an internal threaded portion (10b), and the valve shaft assembly (201) includes an external threaded portion (201a). When the internal threaded portion (10b) and the external threaded portion (201a) are in a non-threaded state, the upper end of the elastic member (208) abuts against the outer shell component (30), and the lower end of the elastic member (208) abuts against the valve shaft assembly (201).

2. The electric valve according to claim 1, characterized in that The valve shaft assembly (201) comprises a valve shaft (2011) and a bushing (2012), wherein 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 in the bushing hole portion (20121), and the bushing hole portion (20121) comprises the channel portion (20c); The elastic member (208) is capable of abutting against the bushing (2012) or the valve shaft (2011).

3. The electric valve according to claim 1, characterized in that The valve shaft assembly (201) comprises a valve shaft main body (2013) and a cylindrical member (2014), wherein the valve shaft main body (2013) and the cylindrical member (2014) are fixedly connected; The cylindrical member (2014) includes a cylindrical member abutting portion (20141), the cylindrical member abutting portion (20141) includes a cylindrical member through-hole portion (201411), a portion of the guide rod (302) is located in the cylindrical member through-hole portion (201411), and the cylindrical member through-hole portion (201411) includes the channel portion (20c); The elastic member (208) is capable of abutting against the cylindrical member (2014).

4. The electric valve according to any one of claims 1 to 3, characterized in that: The elastic member (208) includes a first spring (2081), and the first spring (2081) includes an inner edge portion (208a) of the elastic member; a portion of the guide rod (302) is located within the inner edge portion (208a) of the elastic member.

5. The electric valve according to any one of claims 1 to 3, characterized in that: The elastic member (208) includes a spring (2082), the spring (2082) includes a spring through-hole portion (20821), the guide rod (302) is passed through the spring through-hole portion (20821), the spring through-hole portion (20821) includes an inner edge portion (208a) of the elastic member, a portion of the guide rod (302) is located within the inner edge portion (208a) of the elastic member, and the spring (2082) further includes a spring support portion (20822). When the internal thread portion (10b) and the external thread portion (201a) are in a non-threaded state, the spring support portion (20822) abuts against the housing component (30).

6. The electric valve according to any one of claims 1 to 3, characterized in that: It also includes a second elastic member (204) and a valve core (202); The valve shaft assembly (201) includes a valve shaft inner wall portion (2015), the valve shaft inner wall portion (2015) includes a valve shaft abutment portion (20152), the valve core (202) is disposed through the valve shaft assembly (201), the valve core (202) includes a valve core abutment portion (202b), and the valve core abutment portion (202b) is capable of abutting against the valve shaft abutment portion (20152); The valve shaft assembly (201) further includes a spring abutment portion (20a), the upper end portion of the second elastic member (204) abuts against the spring abutment portion (20a), and the lower end portion of the second elastic member (204) abuts against the valve core (202).

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