CN114321396A - Electric valve - Google Patents

Abstract

The utility model provides an electrically operated valve, including rotor subassembly, lead screw and bearing, rotor subassembly and lead screw fixed connection, the rotor subassembly can drive the lead screw and rotate, the rotor subassembly has the rotor chamber, be located the periphery of lead screw through setting up the bearing, it is located the rotor intracavity that the rotor subassembly formed to set up the bearing, and like this, be favorable to reducing the friction loss of lead screw when rotating on the one hand, on the other hand is favorable to reducing the swing of lead screw when rotating, thereby makes the electrically operated valve operation stable.

Description

Electric valve

Technical Field

The present application relates to an electrically operated valve.

Background

In a vehicle thermal management system, an electric valve is often used as a throttling element, and the electric valve can realize a throttling function through forward flow or reverse flow of fluid according to the requirements of the system. The motorised valve includes lead screw and rotor subassembly, and the rotor subassembly can drive the lead screw rotor, and the rotor subassembly can have the problem of lead screw swing and friction loss at the in-process that drives the lead screw pivoted, is unfavorable for the operation stability of motorised valve like this.

Disclosure of Invention

The utility model provides an aim at provides an motorised valve is favorable to reducing the swing and the friction loss of lead screw in the motion process, is favorable to the operation stability of motorised valve.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the electric valve comprises a valve component, wherein the valve component comprises a rotor component and a screw rod, the rotor component is fixedly connected with the screw rod, the rotor component can drive the screw rod to rotate, the valve component further comprises a bearing, the rotor component is provided with a rotor cavity, part of the screw rod is located in the rotor cavity, the bearing is located on the periphery of the screw rod, and the bearing is located in the rotor cavity.

The application provides an electrically operated valve, including the rotor subassembly, lead screw and bearing, rotor subassembly and lead screw fixed connection, the rotor subassembly can drive the lead screw and rotate, the rotor subassembly has the rotor chamber, be located the periphery of lead screw through setting up the bearing, it is located the rotor intracavity that the rotor subassembly formed to set up the bearing, and like this, be favorable to reducing the friction loss of lead screw when rotating on the one hand, on the other hand is favorable to reducing the swing of lead screw when rotating, thereby make the electrically operated valve operation stable.

Drawings

Figure 1 is a schematic perspective view of one embodiment of an electrically operated valve;

figure 2 is a schematic cross-sectional view of the electrically operated valve of figure 1;

FIG. 3 is a cross-sectional structural view of the valve member of FIG. 2;

FIG. 4 is an enlarged partial view of portion A of FIG. 3;

FIG. 5 is a perspective view of the second support member of FIG. 3;

FIG. 6 is a perspective view of the nut base of FIG. 3;

fig. 7 is a partially enlarged view of a portion B in fig. 3.

Detailed Description

The present application is further described with reference to the following figures and specific examples:

referring to fig. 1 and 2, the electrically operated valve may be applied to a vehicle thermal management system, wherein the vehicle thermal management system comprises a new energy vehicle thermal management system. The electric valve 100 includes a control member 1, a valve member 2, and a valve body member 3, a part of the valve member 2 is located in a valve body cavity 30 formed by the valve body member 3, the valve member 2 is connected to the valve body member 3, the control member 1 is located on the outer periphery of the valve member 2, the control member 1 is connected to the valve body member 3, and the electric valve 100 is electrically and/or signal-connected to the outside through the control member 1.

Referring to fig. 1 and 2, the control component 1 includes an outer casing 11, a stator assembly 12 and a connector 13, the stator assembly 12 includes a coil winding 121, and the connector 13 includes a first pin 131, in this embodiment, the coil winding 121 and the first pin 131 are used as injection inserts and are integrally injection-molded to form the outer casing 11, the connector 13 and the outer casing 11 are integrally injection-molded, one end of the first pin 131 is electrically connected to the coil winding 121, and the other end of the first pin 131 is located in a socket cavity formed by the connector 13 and is used for being electrically connected to the outside.

Referring to fig. 3, the valve part 2 includes a rotor assembly 20, a lead screw 21, a support member 22, a transmission assembly 23, a valve core 24, and a fixing seat 25. The rotor assembly 20 includes a rotor 201 and a fixing plate 202, and the fixing plate 202 may be used as an injection insert to form the rotor 201 by injection molding, that is, the fixing plate 202 and the rotor 201 are fixed by injection molding. The transmission assembly 23 includes a nut seat 231, the rotor assembly 20 is fixedly connected to one end of the lead screw 21, specifically, the rotor assembly 20 is fixedly connected to the lead screw 21 through a fixing plate 202, the fixing plate 202 is located at the periphery of the lead screw 21, and the fixing plate 202 and the lead screw 21 can be fixedly connected through welding or interference fit. The other end of the screw rod 21 is in threaded connection with the nut seat 231, specifically, an external thread section is arranged on the outer surface of the end of the screw rod 21 connected with the nut seat 231, the nut seat 231 is provided with a first through hole 232, an internal thread section is arranged on the inner wall surface of the nut seat 231 forming the first through hole 232, the screw rod 21 extends into the first through hole 232, and the outer surface of the screw rod 21 is in threaded fit with the inner wall surface of the nut seat 231 to realize the threaded connection of the screw rod 21 and the nut seat 231. The valve core 24 is connected with the nut seat 231, specifically, at least part of the nut seat 231 is located in an inner cavity 240 formed by the valve core 24, the valve core 24 comprises a second step portion 241, the valve component 2 further comprises a first gasket 26 and a bushing 27, the first gasket 26 is located in the inner cavity 240, one end surface of the first gasket 26 is abutted with the second step portion 241, and the other end surface of the first gasket 26 can be abutted with an end surface of the nut seat 231 located in the inner cavity 240. The bushing 27 is located on the outer periphery of the nut seat 231, a part of the bushing 27 is located in the inner cavity 240, and the bushing 27 is fixedly connected with the valve core 24. The nut seat 231 includes a fourth stepped portion 233, and the fourth stepped portion 233 can abut against an end surface of the bush 27 located in the inner cavity 240. In this embodiment, the transmission assembly 23 further includes an elastic element 234, the nut seat 231 further includes a second through hole 235, the first through hole 232 communicates with the second through hole 235, a third step portion 236 is formed between the first through hole 232 and the second through hole 235, a part of the elastic element 234 is located in the second through hole 235, the elastic element 234 abuts against the third step portion 236 and the first washer 26, respectively, the elastic element 234 is in an elastic compression state, and the elastic element 234 is provided to facilitate buffering the nut seat 231 when the nut seat 231 drives the valve core 24 to move to the boundary position, so as to slow down the impact between the nut seat 231 and the first washer 26 or the bushing 27, and prolong the service life of the nut seat 231. It should be noted that the elastic element 234 may be a spring or other elastic element. Of course, as another embodiment, the valve member 2 may not include the elastic element 234 and the first washer 26, that is, the nut seat 231 directly abuts against the bushing 27 or the second step 241 during the movement process, so as to move the valve core 24.

Referring to fig. 3 and 4, the supporting member 22 includes a first supporting member 221 and a second supporting member 222, the first supporting member 221 has a first accommodating cavity 223, the second supporting member 222 has a second accommodating cavity 224, at least a portion of the second supporting member 222 is located in the first accommodating cavity 223, the first supporting member 221 is fixedly connected to the second supporting member 222, and in this embodiment, the first supporting member 221 is fixedly connected to the second supporting member 222 by welding. The support member 22 further includes a bearing 225 and a collar 226, a part of the lead screw 21 is located in the first accommodating cavity 223, the bearing 225 and the collar 226 are respectively located on the outer periphery of the lead screw 21, the bearing 225 and the collar 226 are located in the first accommodating cavity 223, and the collar 226 is fixedly connected with the first support 221, specifically, the collar 226 and the first support 221 may be fixedly connected by welding, interference fitting, riveting or the like. The first support 221 further comprises a first step 227, the bearing 225 is located between the collar 226 and the first step 227, and the bearing 225 can abut against the collar 226 and/or the first step 227, i.e. the bearing 225 is axially limited by the collar 226 and the first step 227. The lead screw 21 is engaged with a bearing 225, the lead screw 21 is axially limited by the bearing 225, specifically, in the present embodiment, the lead screw 21 includes a protrusion 211, the valve component 2 further includes a sleeve 212, the sleeve 212 is located at the outer periphery of the lead screw 21, the sleeve 212 is fixedly connected with the lead screw 21, such as being in interference fit or welding fixed connection, the bearing 225 is located between the sleeve 212 and the protrusion 211, and the sleeve 212 and/or the protrusion 211 can be abutted against the bearing 225, so that when the bearing 225 axially limits, the lead screw 21 is also axially limited by the bearing 225. Part of the support member 22 is located in the rotor cavity 203 formed by the rotor assembly 20, and specifically, the bearing 225 is located in the rotor cavity 203 of the rotor assembly 20, which is beneficial to reduce the friction loss of the screw 21 during rotation; on the other hand, the bearing 225 is disposed in the rotor cavity 203, which is beneficial to reducing the swing of the lead screw 21 when rotating, so that the operation of the lead screw 21 is stable, specifically, since the rotor assembly 20 is fixedly connected with one end of the lead screw 21 through the fixing plate 202, and the nut seat 231 is in threaded connection with the other end of the lead screw 21, along the axial direction of the lead screw 21, the distance L1 from the upper end surface of the bearing 225 to the lower end surface of the fixing plate 202 and the distance L2 from the lower end surface of the bearing 225 to the upper end point of the external thread section of the lead screw can be set to be equal or nearly equal, which is beneficial to better reducing the swing of the lead screw 21 when rotating, so that the operation of the lead screw 21 is stable, and further, the operation of the electric valve 100 is stable. The end surface of the bearing 225 close to the collar 226 is defined as an upper end surface, the end surface of the bearing 225 close to the first step portion 227 is defined as a lower end surface, the end surface of the fixing plate 202 close to the bearing 225 is defined as a lower end surface, and the end point of the external thread section of the screw close to the bearing 225 is defined as an upper end point.

Referring to fig. 3, 5 and 6, the inner wall surface of the second supporting member 222 forming the second accommodating cavity 224 is provided with a limiting portion 228, the limiting portion 228 is a non-rotating body, correspondingly, the outer side wall of the nut seat 231 is provided with an engaging portion 237, a part of the nut seat 231 is located in the second accommodating cavity 224, the limiting portion 228 and the engaging portion 237 are engaged with each other to prevent the nut seat 231 from rotating circumferentially during the movement, specifically, the limiting portion 228 may have various structures as long as the nut seat 231 can be prevented from rotating circumferentially, in this embodiment, the position-limiting portion 228 includes position-limiting portion side surfaces 229, the number of the position-limiting portion side surfaces 229 is four and symmetrically distributed, correspondingly, the engaging portion 237 includes engaging portion side surfaces 239, the number of the engaging portion side surfaces 239 is four and symmetrically distributed, when the nut seat 231 is located in the second receiving cavity 224, the side surface 229 of the limiting portion is abutted with the side surface 239 of the matching portion to prevent the nut seat 231 from rotating in the circumferential direction. On the other hand, by providing the stopper portion side surface 229 to abut against the engaging portion side surface 239, the second support member 222 can guide the axial movement of the nut holder 231.

Referring to fig. 2 and 3, the support member 22 is fixedly connected to the fixing seat 25, specifically, in the present embodiment, the support member 22 is fixedly welded to the fixing seat 25 through the first support member 221, the valve component 2 further includes a sleeve 28, the sleeve 28 is located at the outer periphery of the rotor assembly 20, the sleeve 28 is fixedly connected to the support member 22, specifically, the sleeve 28 can be fixedly connected to the first support member 221 through welding, and the sleeve 28 is provided to separate the stator assembly 12 and the rotor assembly 20, which is beneficial to prevent the working medium located at the rotor assembly 20 from contacting the stator assembly 12 and causing corrosion or failure of the stator assembly 12.

Referring to fig. 3, the valve component 2 further includes a first sealing assembly 29, the first sealing assembly 29 includes a first sealing member 291 and a first sealing ring 292, the first sealing ring 292 may be formed by integral injection molding, in this embodiment, the first sealing ring 292 is made of Polytetrafluoroethylene (PTFE), but as another embodiment, the first sealing ring 292 may also be made of a mixture of PTFE and another material or another plastic material with hardness and elasticity. The fixed seat 25 has a first installation cavity 251, a portion of the valve core 24 is located in the first installation cavity 251, the first sealing ring 292 is located on the outer periphery of the valve core 24, the first sealing ring 292 is in interference fit with the valve core 24, the first sealing ring 292 is in close contact with the outer peripheral wall of the valve core 24, and plays a role in sealing the valve core 24, the first sealing ring 292 includes a first groove portion 293, a portion of the first sealing member 291 is located in a first groove cavity formed by the first groove portion 293, the first sealing member 291 is compressed between the first groove portion 293 and the inner side wall of the fixed seat 25 forming the first installation cavity 251, and the first sealing member 291 is in a sealing and compressing state. Further, in order to prevent the first sealing assembly 29 from moving axially along with the valve element 24 and ensure the sealing performance of the first sealing assembly 29, the fixing seat 25 further includes a fifth step portion 252, the first sealing assembly 29 further includes a first retainer ring 294, the first retainer ring 294 is located on the outer periphery of the valve element 24 and fixedly connected with the fixing seat 25, specifically, the first retainer ring 294 and the fixing seat 25 can be fixedly connected through welding or interference fit, the first sealing assembly 29 is located between the fifth step portion 252 and the first retainer ring 294, and the first sealing assembly 29 is axially limited through the fifth step portion 252 and the first retainer ring 294.

Referring to fig. 3 and 7, the valve member 2 further includes a valve core seat 4 and a second seal assembly 5, and the first seal assembly 29 and the second seal assembly 5 are located on both sides of the valve core seat 4 in the axial direction of the valve core 24. The second sealing assembly 5 includes a second sealing element 51, a second sealing ring 52 and a connecting piece 53, the material of the second sealing ring 52 may be the same as the material of the first sealing ring 292, the valve core seat 4 is fixedly connected with the fixing seat 25, the valve core seat 4 is fixedly connected with the connecting piece 53, that is, the valve core seat 4 is connected with the fixing seat 25 and the connecting piece 53, specifically, the valve core seat 4 and the fixing seat 25 and the valve core seat 4 and the connecting piece 53 may be fixedly connected by welding. The connecting piece 53 comprises a second groove portion 531, the second sealing ring 52 is press-fitted into a cavity formed by the connecting piece 53, the second sealing ring 52 and the connecting piece 53 can be fixed through interference fit, part of the second sealing element 51 is located in the second groove cavity formed by the second groove portion 531, the second sealing element 51 is pressed between the end face of the second sealing ring 52 and the second groove portion 531, and the second sealing element 51 is in a sealing and pressing state. Further, the valve core seat 4 may further include a flange portion 41, and the flange portion 41 is provided for axially limiting the second sealing member 51.

Referring to fig. 3 and 7, the valve member 2 has a spool chamber 40, the spool 24 is located in the spool chamber 40, and the spool 24 is axially reciprocable in the spool chamber 40 and is bounded in terms of movement by the second support 222 and the second seal ring 52. In this embodiment, the cartridge chamber 40 may be formed by the retaining seat 25, the cartridge seat 4, and the second seal assembly 5. The second sealing ring 52 includes the valve port 521, and the rotor assembly 20 can drive the valve core 24 to be close to or far away from the valve port 521, so as to change the flow cross-sectional area formed by the working medium at the valve port 521, to form a throttling at the valve port 521, and to form the valve port 521 by providing the second sealing ring 52 (plastic part), so that a better sealing effect can be formed when the valve core 24 abuts against the valve port 521, which is beneficial to improving inner leakage, and the electric valve 100 can be applied to a working environment with a larger pressure range. In the present embodiment, the valve core 24 further includes an inclined section 242 engaged with the valve port 521, and a cross-sectional width D of the inclined section 242 gradually decreases from top to bottom along an axial direction of the valve core 24, and has a minimum cross-sectional width at a free end of the valve core 24. The inclined section 242 is arranged to form a linear throttling with the valve port 521 when the valve core 24 is close to or far from the valve port 521, which is beneficial to improving the flow control accuracy of the electric valve 100. It should be noted that the interval width of the linear throttling can be adjusted by setting the axial height H of the inclined section 242, and the flow rate change rate of the linear throttling can be adjusted by setting the inclination degree of the inclined section 242. Specifically, a plane may be defined, which is parallel to the central axis of the valve component 2, and as shown in the plane of the cross section shown in fig. 7, an included angle θ may be formed between the projection of the outer side wall of the inclined section 242 on the plane and the projection of the outer side wall of the vertical section portion of the valve core 24 on the plane, and the inclination degree of the inclined section 242 may be set by setting the size of the included angle θ, and the included angle θ may be generally set in the range of 1 ° to 3 °.

Referring to fig. 2, the valve body member 3 includes a first flow passage 31 and a second flow passage 32, the first flow passage 31 and the second flow passage 32 are respectively communicated with the valve body cavity 30, a part of the valve member 2 is located in the valve body cavity 30, the first flow passage 31 and the second flow passage 32 can be communicated through the valve port 521, the valve member 2 is connected with the valve body member 3, specifically, the valve member 2 and the valve body member 3 can be connected by a threaded connection or a welding fixed connection or a compression nut fastening or the like, in this embodiment, the valve member 2 is connected with the valve body member 3 by a fixing seat 25. Further, a sealing arrangement can be arranged between the valve member 2 and the valve body member 3, which is beneficial to preventing the working medium from leaking from an assembly gap between the valve member 2 and the valve body member 3.

Referring to fig. 2 and 3, the electric valve 100 works according to the following principle: after the control component 1 is powered on, the control component 1 can generate an excitation magnetic field through the stator assembly 12, the rotor assembly 20 can drive the lead screw 21 to rotate under the excitation of the magnetic field of the stator assembly 12, the lead screw 21 is in threaded fit with the nut seat 231, the lead screw 21 is axially limited through the bearing 225, the nut seat 231 is circumferentially limited through the second support piece 222, so that under the action of the threads, the lead screw 21 rotates circumferentially without moving axially, the nut seat 231 moves axially without rotating circumferentially under the guiding action of the second support piece 222, the nut seat 231 is connected with the valve core 24, the axial movement of the nut seat 231 drives the axial movement of the valve core 24, and thus the valve core 24 can realize the communication, the closing or the throttling of the first flow passage 31 and the second flow passage 32 by being close to or far from the valve port 521.

Referring to fig. 2, in the operation process of the electric valve 100, when the first flow channel 31 is used as a fluid inlet, the second flow channel 32 is used as a fluid outlet, and the flow direction of the fluid at this time is defined as a forward flow, after the high-pressure fluid flows in from the first flow channel 31, the high-pressure fluid enters the valve core chamber 40 through the communication hole 42 of the valve core seat 4, the number of the communication holes 42 is at least one, in this embodiment, the number of the communication holes 42 is multiple and is symmetrically distributed, so that the impact on the valve core 42 when the high-pressure fluid flows in from the first flow channel 31 is balanced, the valve core 24 moves axially relative to the valve port 521, a throttling can be formed at the valve port 521, and the high-pressure fluid at the valve core chamber 40 becomes a low-pressure fluid after throttling at the valve port 521, and flows out from the second flow channel 32 to a subsequent circuit.

Referring to fig. 2 and 3, when the second flow passage 32 is used as a fluid inlet, and when the first flow passage 31 is used as a fluid outlet, the flow direction of the fluid is defined as a reverse flow, and when the high-pressure fluid flows in from the second flow passage 32, the high-pressure fluid will act on the free end surface of the valve core 24, and will generate an upward acting force on the valve core 24, in order to eliminate or slow down the pressure action of the high-pressure fluid on the valve core 24, so that the valve core 24 can move smoothly, the electric valve 100 further includes a balance passage, specifically, in this embodiment, the nut seat 231 further includes at least one balance hole 238, the balance hole 238 is communicated with the valve core cavity 40 and the first through hole 232 of the nut seat 231, the inner cavity 240 of the valve core 24 is communicated with the second through hole 235 of the valve body cavity 30 and the nut seat 231, and the second through hole 235 is communicated with the first through hole 232, so that the high-pressure fluid can flow in from the inner cavity 240 of the valve core 24, after flowing through the second through hole 235 and the first through hole 232 of the nut seat 231, the fluid flows out of the balance hole 238, flows into the spool chamber 40, is located on the back pressure side of the spool 24, and is sealed by the first sealing assembly 29, and the high-pressure fluid located on the back pressure side of the spool 24 will generate a downward acting force on the spool 24, so that the spool 24 is subjected to the pressure of the high-pressure fluid in the opposite direction, which is beneficial to balancing or tending to balancing the force applied to the spool 24, and further, the spool 24 can move smoothly. The valve body 24 moves axially relative to the valve port 521, and can form a throttle at the valve port 521, so that the fluid flows into the second channel 32, then throttles at the valve port 521, becomes a low-pressure fluid, and flows out of the first channel 31 after passing through the communication hole 42, and flows to a subsequent circuit. The balance hole 238 is provided to facilitate rapid balancing or balancing of the pressure of the high-pressure fluid on the valve core 24, but for other embodiments, the nut seat 231 may not include the balance hole 238, that is, the high-pressure fluid may enter the valve core chamber 40 through the thread fit clearance between the nut seat 231 and the lead screw 21 and be located on the back pressure side of the valve core 24, which can also balance or balance the force on the valve core 24. Of course, it is easily conceivable that the high-pressure fluid, after entering the inner cavity 240, may enter the spool cavity 40 on the spool back pressure side through the fitting clearance of the spool 24 and the nut seat 231.

It should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications and equivalents may be made thereto, and all technical solutions and modifications that do not depart from the spirit and scope of the present application are intended to be covered by the claims of the present application.

Claims (11)

1. An electrically operated valve, includes the valve part, the valve part includes rotor subassembly and lead screw, the rotor subassembly with lead screw fixed connection, the rotor subassembly can drive the lead screw rotates, its characterized in that: the valve component further includes a bearing, the rotor assembly having a rotor cavity, a portion of the lead screw being located in the rotor cavity, the bearing being located at a periphery of the lead screw, the bearing being located in the rotor cavity.

2. Electrically operated valve according to claim 1, characterized in that: the rotor subassembly includes the fixed plate, the rotor subassembly pass through the fixed plate with lead screw fixed connection, the lead screw includes the external screw thread section, follows the axial of lead screw, the up end of bearing to the distance (L1) of the lower terminal surface of fixed plate with the lower terminal surface of bearing to the distance (L2) of the upper end point of external screw thread section equals or tends to equal.

3. Electrically operated valve according to claim 2, characterized in that: the valve part further comprises a first supporting piece and a clamping ring, wherein part of the first supporting piece is located in the rotor cavity, the first supporting piece is provided with a first accommodating cavity, the first supporting piece comprises a first step portion, the bearing is located in the first accommodating cavity, the clamping ring is fixedly connected with the first supporting piece, the bearing is located between the clamping ring and the first step portion, and the bearing is axially limited through the clamping ring and the first step portion.

4. An electrically operated valve according to claim 3, characterised in that: the screw rod comprises a protruding part, the valve component further comprises a sleeve, the sleeve is located on the periphery of the screw rod and fixedly connected with the screw rod, the bearing is located between the sleeve and the protruding part, and the screw rod is axially limited through the sleeve and the protruding part.

5. Electrically operated valve according to claim 3 or 4, characterized in that: the valve component further comprises a nut seat and a second supporting piece, the nut seat is in threaded connection with the lead screw, at least part of the second supporting piece is located in the first accommodating cavity, the second supporting piece is fixedly connected with the first supporting piece, the second supporting piece is provided with a second accommodating cavity, the second supporting piece comprises a limiting portion, the limiting portion is a non-rotating body, the nut seat comprises a matching portion, part of the nut seat is located in the second accommodating cavity, and the limiting portion is matched with the matching portion to limit circumferential rotation of the nut seat.

6. Electrically operated valve according to claim 5, characterized in that: spacing portion includes spacing portion side, cooperation portion includes cooperation portion side, the quantity of spacing portion side is four and symmetric distribution, the quantity of cooperation portion side is four and symmetric distribution, spacing portion side with cooperation portion side laminating sets up.

7. Electrically operated valve according to claim 5 or 6, characterized in that: the valve component further comprises a valve core and a bushing, the valve core is provided with an inner cavity, the valve core comprises a second step part, part of the bushing is positioned in the inner cavity, part of the nut seat is positioned in the inner cavity, the bushing is positioned on the periphery of the nut seat, and the bushing is fixedly connected with the valve core; the valve component further includes a first washer and a resilient element, the nut seat includes a third step, the first washer is located in the internal cavity, the first washer is located between the nut seat and the second step, the resilient element is located between the third step and the first washer, the first washer abuts the second step, the resilient element abuts the first washer and the third step, respectively, and the resilient element is in a resiliently compressed state.

8. Electrically operated valve according to claim 7, characterized in that: the valve component further comprises a first sealing assembly, a second sealing assembly, a valve core seat and a fixed seat, wherein the fixed seat is fixedly connected with the valve core seat, the second sealing assembly is fixedly connected with the valve core seat, the fixed seat is provided with a first installation cavity, the first sealing assembly is located in the first installation cavity, the first sealing assembly and the second sealing assembly are respectively located on the periphery of the valve core, and the first sealing assembly and the second sealing assembly are located on two sides of the valve core seat along the axial direction of the valve core.

9. Electrically operated valve according to claim 8, characterized in that: the first sealing assembly comprises a first sealing element and a first sealing ring, the first sealing ring is positioned on the periphery of the valve core and is in interference fit with the valve core, the first sealing ring comprises a first groove part, part of the first sealing element is positioned in a first groove cavity formed by the first groove part, and the first sealing element is compressed between the first groove part and the fixed seat; the second sealing assembly comprises a second sealing element, a second sealing ring and a connecting piece, the second sealing assembly is fixedly connected with the valve core seat through the connecting piece, the connecting piece comprises a second groove part, the second sealing ring is positioned in a cavity formed by the connecting piece, part of the second sealing element is positioned in a second groove cavity formed by the second groove part, and the second sealing element is pressed between the second groove part and the second sealing ring; the electric valve is provided with a valve port which is positioned on the second sealing ring, and the valve core can move close to or away from the valve port.

10. Electrically operated valve according to claim 9, characterized in that: the valve element also comprises an inclined section matched with the valve port, the width of the cross section of the inclined section is gradually reduced from top to bottom along the axial direction of the valve element to define a plane, the plane is parallel to the central axis of the valve component, an included angle (theta) is formed between the projection of the outer side wall of the inclined section on the plane and the projection of the outer side wall of the vertical section of the valve element on the plane, and the included angle (theta) ranges from 1 degree to 3 degrees.

11. Electrically operated valve according to any of claims 7-10, characterized in that: the valve component is provided with a valve core cavity, the valve core is positioned in the valve core cavity, at least part of the nut seat is positioned in the valve core cavity, the nut seat comprises a balance hole, a first through hole and a second through hole, the balance hole is communicated with the valve core cavity and the first through hole, and the second through hole is communicated with the first through hole and the inner cavity.

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