An electric valve

Abstract

The camming member is engaged with the camming member and the spring member, and the camming member is engaged with the camming member and the spring member, and the camming member is engaged with the camming member and the spring member.

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 13 Patent CN107795724A discloses an electric valve comprising a guide bushing 20 and a valve shaft holder 30. The guide bushing 20 is provided with a fixed external threaded portion 23, and the valve shaft holder 30 is provided with a movable internal threaded portion 33. The fixed external threaded portion 23 and the movable internal threaded portion 33 constitute the thread feed mechanism 28 of the electric valve. A disc-shaped pressure plate (washer) 61 disposed on the lower surface of the top portion 32 of the valve shaft holder 30 is sandwiched between a stepped surface 13 between the upper small-diameter portion 11 and the lower large-diameter portion 12 of the valve shaft 10 of the electric valve and the lower surface of the top portion 32 of the valve shaft holder 30. A compression coil spring (biasing member) 60 is inserted externally into the upper small-diameter portion 11 of the valve shaft 10 to compress the compression coil spring 60. The compression coil spring 60 biases the valve shaft 10 and the valve shaft holder 30 in a direction of separation in the lifting direction (direction of the axis O).

[0003] A return spring 75 is mounted on the outer periphery of the cylindrical portion 71 of the electric valve fixing member 70. The lower end of the return spring 75 contacts the upper side of the disc-shaped portion 72 of the fixing member 70. When the rotor member moves upward excessively, the movable threaded portion 33 of the valve shaft retainer 30 disengages from the fixed threaded portion 23 of the guide bushing 20. At this time, the return spring 75 is compressed, and the rotor member is subjected to the downward force of the return spring 75. When the rotor member reverses its downward movement, the elastic force of the return spring 75 causes the movable threaded portion 33 to re-engage with the fixed threaded portion 23. [Summary of the invention]

[0004] The object of the present invention is to provide an electric valve, comprising a valve body and a coil, wherein the coil is sleeved on the valve body, the valve body comprises a valve seat component and a valve core rotor assembly, and the valve core rotor assembly comprises a valve shaft assembly, a valve core, an elastic member, and a push rod;

[0005] The valve shaft assembly includes a valve shaft abutment portion;

[0006] The valve core is provided through the valve shaft assembly, and the valve core includes a valve core abutment portion, and the valve core abutment portion can abut against the valve shaft abutment portion;

[0007] The push rod includes a push rod main body and a push rod abutting portion, the upper end of the elastic member abuts against the push rod abutting portion, and the lower end of the elastic member abuts against the valve core;

[0008] The valve shaft assembly further includes an abutment portion, which is capable of abutting against the push rod abutment portion;

[0009] The valve shaft assembly further includes a channel portion, and the push rod body portion passes through the channel portion;

[0010] The valve body also includes a limiting portion, the valve seat component includes an internal threaded portion, and the valve shaft assembly includes an external threaded portion. When the internal threaded portion and the external threaded portion are in a non-threaded state, the push rod main body abuts against the limiting portion, and the valve core abutting portion abuts against the valve shaft abutting portion.

[0011] The electric valve provided by the present application has an upper end portion of the elastic member abutting against the push rod abutting portion, and a lower end portion of the elastic member abutting against the valve core. When the internal threaded portion and the external threaded portion are in a non-threaded state, the main body of the push rod abuts against the limiting portion, and the valve core abutting portion abuts against the valve shaft abutting portion. When the valve core rotor component rotates in the valve closing direction, the elastic force of the elastic member on the valve shaft assembly can cause the internal threaded portion of the valve seat component and the external threaded portion of the valve shaft assembly to be re-threaded.

Brief Description of the Drawings

[0012] Figure 1 is a cross-sectional view of the electric valve of the present invention in a fully closed state;

[0013] Figure 2 It is a structural schematic diagram of the valve seat component of the electric valve of the present invention;

[0014] Figure 3 1 is a structural diagram of the valve core rotor component of the electric valve of the present invention, and a partial enlarged cross-sectional view thereof;

[0015] 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 component is about to reach the critical point of over-opening;

[0016] Figure 5 This is a cross-sectional view of the valve body of the electric valve of the present invention when the valve core rotor component is over-opened and the threaded pair is disengaged;

[0017] Figure 6 2 is a schematic structural diagram of a valve core rotor component according to a second embodiment of the present invention;

[0018] Figure 7 2 is a schematic structural diagram of a valve core rotor component according to a third embodiment of the present invention;

[0019] Figure 8 2 is a schematic structural diagram of a valve core rotor component according to a fourth embodiment of the present invention;

[0020] Figure 9 2 is a schematic structural diagram of a valve core rotor component according to a fifth embodiment of the present invention;

[0021] Figure 102. It is a schematic structural diagram of a valve core rotor component according to a sixth embodiment of the present invention;

[0022] Figure 11 2 is a schematic structural diagram of a valve core rotor component according to a seventh embodiment of the present invention;

[0023] Figure 12 FIG1 is a partial structural diagram of a valve core rotor assembly according to an eighth embodiment of the present invention;

[0024] Figure 13 A cross-sectional view of an electric valve in the background art;

[0025] in, Figures 1-12 The following reference numerals are included:

[0026] 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; 20122 Extension portion; 2013 Valve shaft main body; 2014 Cylindrical member; 20141 Cylindrical member abutment portion; 201411 Cylindrical member through-hole portion; 2015 Valve shaft inner wall portion; 20151 First valve shaft inner wall portion; 20152 Valve shaft abutment portion; 20153 Second valve shaft inner wall portion; 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; 2021 valve core body portion; 2022 valve core sleeve; 20221 valve core sleeve hole portion; 202a valve core head portion; 202b valve core abutment portion; 203 rotor; 204 elastic member; 205 push rod; 2051 push rod body portion; 2052 push rod abutment portion; 206 gasket; 2061 gasket hole portion; 207 gasket; 209 upper gasket; 2091 upper gasket hole portion; 20b abutment portion; 20c channel portion; 20d limiting portion; 30 outer shell; 40 coil. [Specific implementation method]

[0027] 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.

[0028] Please refer to Figures 1 to 5 ,in, Figure 1 is 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 2 is a schematic structural diagram of the electric valve rotor 203 of the present invention, and a partially enlarged cross-sectional view thereof; Figure 4This is a cross-sectional view of the valve body of the electric valve of the present invention when the rotor 203 is about to reach the critical point of over-opening; Figure 5 This is a cross-sectional view of the valve body when the electric valve rotor 203 component of the present invention is over-opened and the threaded pair is disengaged;

[0029] Please refer to Figure 1-Figure 3 In a specific embodiment, the electric valve provided by the present invention includes a valve body and a coil 40, the coil 40 is sleeved on the valve body, and the valve body includes a valve core rotor assembly 20 (see Figure 3 ), valve seat component 10 (see Figure 2 ) and housing 30 (see Figure 1 The coil 40 of the electric valve is connected to the drive controller. When the drive controller is powered on, it sends a pulse drive signal to the stator coil 40. The stator coil 40 generates a changing magnetic field, thereby driving the valve core rotor assembly 20 of the electric valve to rotate forward or reverse.

[0030] See Figure 2 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 that passes through the upper and lower parts is provided at the approximate center position 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 is provided with a through hole, and an internal threaded portion 10b is provided in the through hole of the nut 102.

[0031] See Figure 3 The valve core rotor assembly 20 includes a valve shaft assembly 201. In this embodiment, the valve shaft assembly 201 includes a valve shaft 2011. The valve shaft 2011 is provided with an external threaded portion 201a. Figure 1 The valve shaft 2011 is threadedly matched with the nut 102. When the valve core rotor assembly 20 rotates, it will move along the axial direction, thereby driving the valve core 202 to open and close the valve port 10a.

[0032] Continue to refer Figure 2The valve seat component 10 also includes a valve seat 101, and a nut 102 is partially located in the valve seat 101, and the nut 102 is fixedly connected to the valve seat 101 (for example, a connector is used as an insert and integrally injection-molded with the nut 102, and then the connector and the valve seat 101 are fixedly connected by welding or press-fitting, or the nut 102 is press-fitted and fixed to the valve seat 101. In this embodiment, the connector is used as an insert and integrally injection-molded with the nut 102, and then the connector and the valve seat 101 are fixedly connected to achieve the fixed connection between the two). 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 101). In addition, in this embodiment, the valve seat 101 is fixedly connected to a first connecting pipe portion 103 and a 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. When installed in a cooling or heating system such as an air conditioner, it is generally used to connect to the system pipeline.

[0033] 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 can also be omitted, and the flow path for the refrigerant fluid can be directly provided on the valve seat 101. Alternatively, the first connecting portion 103 or the second connecting portion 104 can also be connected by a flange sealing method. For example, when the electric valve is used in automotive air conditioners, heat pumps, and other applications that require rapid maintenance, the first connecting portion 103 and the second connecting portion 104 are used as an example.

[0034] See 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 valve core 202 is inserted into the central through hole of the valve shaft 2011. In addition, the valve core rotor assembly 20 also includes an elastic member 204 arranged in the central through hole of the valve shaft 2011, and a push rod 205 arranged at the upper end of the elastic member 204. The valve shaft assembly 201 also includes a sleeve 2012 fixedly connected to the upper end of the valve shaft 2011. In this embodiment, the elastic member 204 is a spring.

[0035] See Figure 1 The electric valve provided in this embodiment also includes a shell 30 with an opening at one end. The shell 30 is a thin-walled part in the shape of a cover. The lower open side of the shell 30 is tightly welded to the valve seat component 10, thereby forming a accommodating chamber for accommodating the upper half of the nut 102 and the main body of the valve core rotor assembly 20.

[0036] See Figure 1 、 Figure 2The nut 102 protrudes from the annular base and is provided with a fixed stop portion 10c, which can cooperate with the movable stop portion 201b provided on the valve core rotor assembly 20 to constitute a stop mechanism at the lower end of the stroke of the electric valve, that is, when the valve core rotor assembly 20 moves downward to a certain extent relative to the valve seat component 10, 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 component 10, thereby limiting the valve core rotor assembly 20 from continuing to move downward in the axial direction, thereby controlling the downward movement stroke of the valve core rotor assembly 20.

[0037] When the coil 40 of the electric valve receives a driving pulse signal to generate a changing magnetic field, the rotor 203 in the valve body is excited and rotated. 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.

[0038] See Figure 3 , which is a schematic structural diagram of the valve core rotor assembly of the electric valve of the present invention, and a partially enlarged cross-sectional view thereof. 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, an elastic member 204 disposed within the inner bore of the valve shaft 2011, a push rod 205 disposed at the upper end of the elastic member 204, and a bushing 2012 fixedly connected to the upper end of the valve shaft 2011.

[0039] The electric valve of the present invention sets the elastic part 204 in the inner hole cavity of the valve shaft 2011. The valve shaft 2011 constrains it in the circumferential direction and the up and down directions. The elastic part 204 basically does not move up and down, so basically no moving noise is generated, and the risk of failure of the elastic part 204 falling off and shifting can also be avoided.

[0040] See Figure 3In 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 annular surface). Except for the orthographic projection of the second valve shaft inner wall portion 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 diameter of the first valve shaft inner wall portion 20151 is larger than the 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 projection 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 is a circle.

[0041] 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 valve shaft abutment portion 20152 is projected in a circular shape along the plane where the cross section of the valve shaft 2011 is located. 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 form that is not completely planar. For example, in the direction away from the center of the valve shaft 2011, 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 the requirement of having an extension distance in the horizontal direction.

[0042] See Figure 3In this embodiment, the valve shaft 2011 includes an outer edge portion 2016, and 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 outside 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 rotor fixing portion 201c can be fixed by direct or indirect welding, riveting, magnetic plastic material injection molding connection, glue bonding, 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.

[0043] An external thread portion 201a is provided at the position of the valve shaft 2011 where the second outer edge portion 20162 is located. The external thread portion 201a and the internal thread portion 10b provided at the inner hole of the nut 102 are combined to form a spiral feed mechanism (thread pair) of this electric valve.

[0044] In this embodiment, the valve shaft assembly 201 also includes a bushing 2012, which is located in the inner wall portion 20151 of the first valve shaft, and 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.

[0045] See Figure 3In this embodiment, the valve core 202 is inserted into the valve shaft 2011 (part of the valve core 202 is located in the inner wall portion 2015 of the valve shaft). In addition, the valve core 202 is in the shape of a stepped shaft, which includes a valve core head 202a, which is located approximately at the lower end 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 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 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 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 inner cavity of the valve shaft 2011 from the top to the bottom, and its valve core abutting portion 202b can abut against the valve shaft abutting portion 20152, and its valve core head portion 202a passes through 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 the plane and the orthographic projection of the valve shaft abutting portion 20152 along the plane have an overlapping area. 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 valve The outer edge of the core abutment portion 202b, the cross-section of the first valve shaft inner wall portion 20151 and the cross-section of the second valve shaft inner wall portion 20153 are all circular, and the diameter of the valve core abutment portion 202b is slightly smaller than the diameter of the first valve shaft inner wall portion 20151, the diameter of the valve core abutment portion 202b is larger than the diameter of the second valve shaft inner wall portion 20153, and the diameter of the valve core head portion 202a at the largest point is slightly smaller than the diameter of the second valve shaft inner wall portion 20153, so that the valve core 202 can be supported on the valve shaft abutment portion 20152 of the valve shaft 2011.

[0046] In addition, the valve core rotor assembly 20 of the electric valve of this embodiment further includes an elastic member 204 . The elastic member 204 can be designed as a cylindrical coil spring. The elastic member 204 is located in the inner wall portion 20151 of the first valve shaft.

[0047] Continue to refer Figure 3The valve core rotor assembly 20 of the electric valve provided by the present invention also includes a push rod 205, and the push rod 205 includes a push rod main body 2051 and a push rod abutment portion 2052. In this embodiment, the push rod abutment portion 2052 is roughly a structure formed by the circumferential extension of the push rod main body 2051. The push rod abutment portion 2052 is located below the bushing 2012, and the push rod main body 2051 passes through the bushing hole portion 20121 to the outside of the valve shaft assembly 201. The lower end of the elastic member 204 abuts against the valve core 202, and the upper end of the elastic member 204 abuts against the push rod abutment portion 2052 of the push rod 205.

[0048] Continue to refer Figure 3 In the plane where the cross section of the valve core rotor assembly 20 is located, the orthographic projection of the bushing hole portion 20121 along the plane and the orthographic projection of the push rod abutting portion 2052 along the plane have an overlapping area, and the orthographic projection of the push rod main body 2051 along the plane is located within the orthographic projection of the bushing hole portion 20121 along the plane. Therefore, the push rod abutting portion 2052 cannot pass through the bushing hole portion 20121 from bottom to top, and the push rod main body 2051 can pass through the bushing hole portion 20121 (of course, when the bushing 2012 and the push rod are aligned, the bushing 20121 and the push rod are aligned). When a washer or other component is provided between the abutting portions 2052 so that they do not directly abut against each other, the projection relationship between the bushing hole portion 20121 and the push rod abutting portion 2052 may not satisfy the above relationship). In this embodiment, the outer edge of the push rod main body portion 2051, the outer edge of the push rod abutting portion 2052 and the cross-section of the bushing hole portion 20121 are all circular, the diameter of the push rod abutting portion 2052 is larger than the diameter of the bushing hole portion 20121, and the diameter of the push rod main body portion 2051 is smaller than the diameter of the bushing hole portion 20121. The upper end of the push rod body 2051 extends from above the bushing hole 20121. The push rod abutting portion 2052 is subjected to the upward elastic compressive force of the elastic member 204, and the push rod abutting portion 2052 abuts against the bushing 2012 (either directly or indirectly, for example, when a washer or other component is provided between the bushing 2012 and the push rod abutting portion 2052, the push rod abutting portion 2052 and the bushing 2012 abut indirectly). After the bushing 2012 is fixedly connected to the valve shaft 2011, the elastic member 204 is in a compressed state.

[0049] The valve shaft assembly 201 provided in the present application includes an abutment portion 20b, which abuts against the push rod abutment portion 2052. In this embodiment, the bushing 2012 abuts against the push rod abutment portion 2052, so the bushing 2012 includes the abutment portion 20b.

[0050] See Figure 4 , is a cross-sectional view of the valve body of the electric valve of the present invention when the valve core rotor component 20 is about to reach the critical point of over-opening. Figure 4The valve core rotor assembly 20 is in a state of being about to be over-opened (over-opening: 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 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 still has a length (see the length marked as L in the figure) that is still in a threaded state with the internal threaded portion 10b of the nut 102. At this time, the main body of the push rod 2051 just contacts the top of the shell 30.

[0051] 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 stroke height of the upward movement of the position shown is L, at which time the movable threaded portion 201a of the valve shaft 2011 and the fixed threaded portion 10b of the nut 102 are just disengaged, and the elastic member 204 is relatively Figure 4 The state in the middle is further compressed by an amount L, and the top end of the push rod body 2051 of the push rod 205 is pressed tightly against the inner wall of the housing 30. The downward elastic force of the elastic member 204 is ultimately transmitted to the valve shaft assembly 201, that is, the valve shaft assembly 201 is subjected to the downward elastic load of the elastic member 204. If the valve core rotor assembly 20 continues to rotate in the direction of over-opening, the valve core rotor assembly 20 will no longer 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 and rotates downward in the valve closing direction, because the valve shaft 2011 is subjected to the downward elastic pressure of the elastic member 204, the external thread portion 201a and the internal thread portion 10b will be re-engaged, causing the valve core rotor assembly 20 to rotate and move downward.

[0052] Compared with the electric valve in the background art, the electric valve of the present application reduces the number of elastic members. The elastic member 204 in the electric valve of the present application integrates the functions of two springs in the background art.

[0053] The valve shaft assembly 201 provided in the present application includes a channel portion 20c, and the electric valve provided in this embodiment includes a limiting portion 20d. The channel portion 20c can allow the push rod body portion 2051 of the push rod 205 to pass through the valve shaft assembly 201, so that the push rod body portion 2051 can be offset against the limiting portion 20d. In this embodiment, the push rod body portion 2051 can pass through the bushing hole portion 20121 and offset against the outer shell 30. Therefore, in this embodiment, the bushing hole portion 20121 includes the channel portion 20c, and the outer shell 30 includes the limiting portion 20d.

[0054] See Figure 6 , is a structural diagram of the valve core rotor assembly of the second embodiment of the present invention. Figure 3 The valve core rotor assembly 20 of the first embodiment shown is equivalent to a split design of the valve core 202 of the first embodiment. The valve core 202 of this embodiment includes a valve core body 2021 and a valve core sleeve 2022. The valve core sleeve 2022 includes a valve core sleeve hole 20221. The valve core sleeve hole 20221 extends through the upper and lower surfaces of the valve core sleeve 2022. The upper end of the valve core body 2021 passes through the valve core sleeve hole 20221. The valve core body 2021 and the valve core sleeve 2022 can be fixedly connected by press-fitting, welding, or bonding.

[0055] In the valve core 202 of this embodiment, the diameter of the valve core head 202a can be set to be larger than the diameter of the second valve shaft inner wall portion 20153. When the diameter of the valve core head 202a is larger than the diameter of the second valve shaft inner wall portion 20153, the valve core 202 is inserted into the central through hole of the valve shaft 2011 from bottom to top. The valve core sleeve 2022 is then inserted from top to bottom and fixed to the valve core body 2021. The elastic member 204 abuts against the valve core sleeve 2022. In this embodiment, the valve core sleeve 2022 includes a valve core abutment portion 202b, which is capable of abutting against the valve shaft abutment portion 20152. In this example, the lower end of the elastic member 204 abuts against the upper portion of the valve core sleeve 2022.

[0056] Furthermore, in this embodiment, the valve core body 2021 extends through the valve core sleeve hole 20221 and is located within the elastic member 204. When the lower end of the elastic member 204 attempts to deflect radially, the portion of the valve core body 2021 extending from the valve core sleeve hole 20221 can limit the radial deflection of the elastic member 204, thereby further stabilizing the elastic member 204 during operation of the electric valve. The structural scheme of other parts of this embodiment is the same or similar to that of the first embodiment.

[0057] Of course, the valve core sleeve hole portion 20221 can also be in the form of a blind hole, that is, the valve core main body portion 2021 is fixedly connected to the valve core sleeve 2022, but the valve core main body portion 2021 does not pass through the top of the valve core sleeve hole portion 20221, that is, the valve core sleeve hole portion 20221 is not limited to the form of a through hole; or the valve core sleeve hole portion 20221 is in the form of a through hole, but the valve core main body portion 2021 does not pass through the top of the valve core sleeve hole portion 20221.

[0058] See Figure 7 , is a structural diagram of the valve core rotor assembly of the third embodiment of the present invention. Figure 6Compared to the second embodiment in

[15] , the main difference lies in the addition of a gasket 206 between the upper end of the valve core sleeve 2022 and the lower end of the elastic member 204. This gasket 206 includes a gasket hole 2061 that extends through the upper and lower surfaces of gasket 206. The addition of this gasket 206 reduces the frictional resistance of the relative rotational movement of the valve core 202 with respect to the elastic member 204, thereby improving the operational reliability and lifespan of the electric valve. In this embodiment, the lower end of the elastic member 204 abuts against the upper end surface of the gasket 206. The structural scheme of other parts of this embodiment is the same or similar to that of the second embodiment.

[0059] See Figure 8 , is a structural diagram of the valve core rotor assembly of the fourth embodiment of the present invention. Figure 7 Compared to the third embodiment in the present invention, the main difference lies in the change in the position of gasket 206, which is now located between the valve shaft abutment portion 20152 and the valve core abutment portion 202b. Gasket 206 also has a gasket hole 2061. The valve core abutment portion 202b abuts against gasket 206, and the lower end of elastic member 204 abuts against valve core 202. The addition of gasket 206 reduces the frictional resistance of the valve core 202's relative rotational motion with respect to the valve shaft 2011, thereby improving the operational reliability and lifespan of the electric valve. The structural scheme of other parts of this embodiment is the same or similar to that of the third embodiment.

[0060] This embodiment emphasizes that the "offsetting" mentioned in this application includes both direct offsetting of two components and offsetting of two components through other components.

[0061] See Figure 9 , is a structural diagram of the valve core rotor assembly of the fifth embodiment of the present invention. Figure 3 The main difference between the valve core rotor assembly 20 of the first embodiment shown is the slightly different structure of the bushing 2012. In this embodiment, the bushing 2012 covers the top of the valve shaft 2011, and the bushing 2012 is fixedly connected to the valve shaft 2011.

[0062] The bushing 2012 of this embodiment further includes an extension portion 20122 extending downwardly from its circumferential outer edge. In this embodiment, the bushing 2012 is generally shaped like a shell, and the extension portion 20122 of the bushing 2012 is securely mounted on the outer circumference of the valve shaft 2011. The structural scheme of other parts of this embodiment is the same or similar to that of the first embodiment. In this embodiment, the bushing 2012 is not located within the valve shaft inner wall portion 2015.

[0063] See Figure 10 , is a structural diagram of the valve core rotor assembly of the sixth embodiment of the present invention. Figure 3Compared to the first embodiment in the present invention, the main difference lies in the addition of a gasket 207 between the upper end of the valve core 202 and the lower end of the elastic member 204. The addition of this gasket 207 reduces the frictional resistance of the valve core 202 during relative rotational motion with the elastic member 204, thereby reducing the valve core 202 from rotating with the valve shaft assembly 201. This reduces friction between the valve core head 202a and the valve port 10a, thereby reducing wear on the valve port 10a and the valve core head 202a, thereby improving the operational reliability and lifespan of the electric valve. In this embodiment, the lower end of the elastic member 204 abuts against the gasket 207. The structural scheme of other parts of this embodiment may be the same or similar to that of the first embodiment.

[0064] See Figure 11 , is a schematic structural diagram of the rotor 203 component of the seventh embodiment of the present invention.

[0065] 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 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. The valve shaft body 2013 is fixedly connected to the cylindrical member 2014. The substantially inner side wall portion of the valve shaft body 2013 after being fixedly connected to the cylindrical member 2014 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 may 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, and a cylindrical member abutment portion 20141 is provided roughly above the cylindrical member 2014, and a cylindrical member through-hole portion 201411 is provided roughly in the middle position of the cylindrical member abutment portion 20141. In the plane where the cross section of the valve shaft assembly 201 is located, the cylindrical member through-hole portion 201411 is located outside the orthographic projection of the push rod main body portion 2051 along the plane, and is located inside the orthographic projection of the push rod abutment portion 2052 along the plane. In this embodiment, the outer edges of the cylindrical member through-hole portion 201411, the push rod main body portion 2051 and the push rod abutment portion 2052 are all circular, and the diameter of the cylindrical member through-hole portion 201411 is larger than the diameter of the push rod main body portion 2051, and smaller than the diameter of the push rod abutment portion 2052.

[0066] The valve core abutment portion 202b can abut against the upper end surface of the valve shaft main body 2013. At this time, the upper end surface of the valve shaft main body 2013 forms a valve shaft abutment portion 20152. The side 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 side hole wall located below the valve shaft abutment portion 20152 forms a second valve shaft inner wall portion 20152. The elastic member 204 is accommodated in the valve shaft. In the space defined by the cylindrical member 2014 and the valve shaft main body 2013, the cylindrical member abutting portion 20141 and the push rod abutting portion 2052 can abut against each other, so the cylindrical member abutting portion 20141 includes the abutting portion 20b, and the push rod main body 2051 of the push rod 205 extends upward from the cylindrical member through hole portion 201411 and can abut against the limiting portion 20d, so the cylindrical member through hole portion 201411 includes the channel portion 20c.

[0067] The cylindrical member 2014 may be formed in one piece, or may be formed by fixedly connecting two or more parts.

[0068] 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.

[0069] See Figure 12 , is a partial structural diagram of the valve core rotor assembly of the eighth embodiment of the present invention.

[0070] This embodiment and Figure 3 Compared with the first embodiment in the embodiment, the main difference is that an upper washer 209 is additionally provided below the bushing 2012, and the upper washer is provided with an upper washer hole portion 2091, and the upper washer hole portion 2091 passes through the upper and lower surfaces of the upper washer 209, the upper end face of the upper washer 209 is abutted against the bushing 2012, the lower end of the upper washer 209 is abutted against the push rod abutting portion 2052, and the push rod main body portion 2051 passes through the bushing hole portion 20121. In this embodiment, the bushing hole portion 20121 includes a channel portion 20c, and the upper washer 209 is abutted against the push rod abutting portion 2052.

[0071] Since the above are only different matching relationships formed by adding different structures of gaskets 209 to the valve shaft assembly 201, the overall concept does not deviate from the scope of this patent. The offset described in this application includes direct offset and indirect offset.

[0072] 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.

[0073] In the above embodiment, the push rod 205 is configured to abut against the housing 30. In this case, the housing 30 includes a limiting portion 20d. Alternatively, a housing connector may be welded to the housing 30, with the push rod 205 abutting against the housing connector. In this case, the limiting portion 20d is the component abutting against the push rod 205. In other words, the limiting portion 20d of the present application is a component that can abut against the push rod 205, and is not necessarily limited to the housing 30.

[0074] 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.

[0075] 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".

[0076] 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.

[0077] 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.

[0078] 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 seat component (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), an elastic member (204) and a push rod (205); The valve shaft assembly (201) includes a valve shaft abutment portion (20152); The valve core (202) is provided through the valve shaft assembly (201), and the valve core (202) includes a valve core abutment portion (202b), and the valve core abutment portion (202b) can abut against the valve shaft abutment portion (20152); The push rod (205) comprises a push rod main body (2051) and a push rod abutting portion (2052); the upper end of the elastic member (204) abuts against the push rod abutting portion (2052); and the lower end of the elastic member (204) abuts against the valve core (202); The valve shaft assembly (201) further comprises an abutting portion (20b), and the abutting portion (20b) is capable of abutting against the push rod abutting portion (2052); The valve shaft assembly (201) further includes a channel portion (20c), and the push rod main body portion (2051) passes through the channel portion (20c); The valve body also includes a limiting portion (20d), 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 push rod main body (2021) abuts against the limiting portion (20d), and the valve core abutting portion (202b) abuts against the valve shaft abutting portion (20152).

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), the push rod body portion (2021) passes through the bushing hole portion (20121), and the bushing hole portion (20121) comprises the channel portion (20c); The push rod abutting portion (2052) abuts against the bushing (2012), and the bushing (2012) includes the abutting portion (20b).

3. The electric valve according to claim 2, characterized in that The valve shaft assembly (201) further includes an upper gasket (209), the upper gasket (209) including an upper gasket hole portion (2091), the upper gasket (209) abuts against the push rod abutment portion (2052), the upper gasket (209) abuts against the bushing (2012), and the push rod main body portion (2021) passes through the upper gasket hole portion (2091).

4. 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, and the valve shaft main body (2013) comprises the external threaded portion (201a); The cylindrical member (2014) includes a cylindrical member abutting portion (20141), the cylindrical member (2014) abutting portion includes a cylindrical member through-hole portion (201411), the push rod main body portion (2051) passes through the cylindrical member through-hole portion (201411), and the cylindrical member through-hole portion (201411) includes the channel portion (20c); The push rod abutting portion (2052) abuts against the cylindrical member abutting portion (20141), and the cylindrical member abutting portion (20141) includes the abutting portion (20b).

5. The electric valve according to claim 4, characterized in that: The valve shaft assembly (201) further includes an upper gasket (209), the upper gasket (209) includes an upper gasket hole portion (2091), the upper gasket (209) abuts against the push rod abutment portion (2052), the upper gasket (209) abuts against the tubular member abutment portion (20141), and the push rod main body portion (2021) passes through the upper gasket hole portion (2091).

6. The electric valve according to any one of claims 1 to 5, characterized in that: It also includes a gasket (206), wherein the gasket (206) abuts against the elastic member (204), and the gasket (206) abuts against the valve core (202).

7. The electric valve according to any one of claims 1 to 5, characterized in that: It also includes a gasket (206), the gasket (206) includes a gasket through-hole portion (2061), the valve core (202) passes through the gasket through-hole portion (2061), the valve core abutment portion (202b) abuts against the gasket (206), and the gasket (206) abuts against the valve shaft abutment portion (202b).

8. The electric valve according to any one of claims 1 to 5, characterized in that: The valve core (202) further comprises a valve core main body (2021) and a valve core sleeve (2022), wherein the valve core sleeve (2022) comprises a valve core sleeve hole portion (20221), a portion of the valve core main body (2021) is located in the valve core sleeve hole portion (20221), and the valve core main body (2021) is fixedly connected to the valve core sleeve (2022); The elastic member (204) abuts against the valve core sleeve (2022), the valve core sleeve (2022) can abut against the valve shaft abutment portion (20152), and the valve core sleeve (2022) includes the valve core abutment portion (202b).

9. The electric valve according to claim 8, characterized in that The valve core sleeve hole portion (20221) is a through hole, the valve core main body portion (2021) passes through the valve core sleeve hole portion (20221), and a portion of the valve core main body portion (2021) is located inside the elastic member (204).

10. The electric valve according to any one of claims 1 to 5 and 9, characterized in that: It also includes a shell (30), which is fixedly connected to the valve seat component (10). When the internal threaded portion (10b) and the external threaded portion (201a) are in a non-threaded state, the main body of the push rod (2021) abuts against the shell (30), and the shell (30) includes the limiting portion (20d).

11. The electric valve according to any one of claims 1 to 5 and 9, characterized in that: It also includes a shell (30) and a shell connecting piece, wherein the shell connecting piece is fixedly connected to the shell (30), and when the internal threaded portion (10b) and the external threaded portion (201a) are in a non-threaded state, the main body portion (2021) of the push rod abuts against the shell connecting piece, and the shell connecting piece includes the limiting portion (20d).

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