CN219796160U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN219796160U CN219796160U CN202320436945.2U CN202320436945U CN219796160U CN 219796160 U CN219796160 U CN 219796160U CN 202320436945 U CN202320436945 U CN 202320436945U CN 219796160 U CN219796160 U CN 219796160U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve core
- seat
- electronic expansion
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000011162 core material Substances 0.000 claims description 115
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000001595 flow curve Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Lift Valve (AREA)
Abstract
The utility model provides an electronic expansion valve, which comprises a valve component, wherein the valve component comprises a rotor, a screw rod, a bearing, a valve core, a bushing, a nut seat, a first sealing component, a second sealing component, a valve core seat and a fixed seat, the valve core comprises an inclined section matched with a valve port, the cross section width of the inclined section gradually decreases from top to bottom along the axial direction of the valve core, the electronic expansion valve is provided with two valve ports along the axial direction, the first valve port is positioned on the valve core seat, the second valve port is positioned on the second sealing component, the inner diameter of the first valve port is larger than the inner diameter of the second valve port, and in the closed state of the valve core, the valve core simultaneously abuts against the first valve port and the second valve port, and the material hardness of the first valve port is larger than the material hardness of the second valve port. The first valve port can limit the axial movement of the valve core, so that the valve core is furthest protected from wearing the second valve port, the stability of the flow curve of the electronic expansion valve is ensured, and the valve core is not seriously deviated from a design value due to long-term use.
Description
Technical Field
The utility model relates to the technical field of fluid control, in particular to an electronic expansion valve.
Background
The refrigeration system includes a compressor, an evaporator, a condenser, and a throttling element, typically employing an electronic expansion valve as the throttling element, the electronic expansion valve being used to throttle the refrigerant of the refrigeration system. Chinese application 202011047068.7 discloses an electronic expansion valve, including valve part, valve part includes rotor subassembly, lead screw and bearing, and rotor subassembly and lead screw fixed connection, rotor subassembly can drive the lead screw and rotate, and rotor subassembly has the rotor chamber, is located the periphery of lead screw through setting up the bearing, sets up the rotor intracavity that the bearing is located the rotor subassembly and forms. The valve component comprises a rotor component, a screw rod, a supporting member, a transmission component, a valve core and a fixing seat, and further comprises a valve core seat and a second sealing component, wherein the first sealing component and the second sealing component are located on two sides of the valve core seat along the axial direction of the valve core. The second sealing component comprises a second sealing piece, a second sealing ring and a connecting piece, wherein the second sealing ring is made of Polytetrafluoroethylene (PTFE), the valve core seat is fixedly connected with the fixing seat, and the valve core seat is fixedly connected with the connecting piece. In the valve core closed state, the valve core and the second sealing ring are abutted and kept sealed. However, the valve core is frequently opened and closed, and the second sealing ring is severely worn, so that the flow curve of the electronic expansion valve is seriously deviated from the design value.
Disclosure of Invention
The utility model aims to provide an electronic expansion valve, which has stable flow curve and does not deviate from a design value seriously due to long-term use.
As one aspect of the present utility model, there is provided an electronic expansion valve, including a valve member, the valve member including a rotor, a screw rod, a bearing, a valve core, a bushing, a nut seat, a first sealing assembly, a second sealing assembly, a valve core seat, and a fixing seat, wherein the rotor is fixedly connected with the screw rod, the rotor can drive the screw rod to rotate, the screw rod is in threaded connection with the nut seat, and the bearing is located at the periphery of the screw rod; the valve core top is provided with an inner cavity comprising a step, at least part of the lining is positioned in the inner cavity, at least part of the nut seat is positioned in the inner cavity, the lining is fixedly connected with the valve core top, the fixing seat is fixedly connected with the valve core seat, the second sealing component is fixedly connected with the valve core seat, the fixing seat is provided with a first mounting cavity, the first sealing component is positioned in the first mounting cavity, the first sealing component and the second sealing component are respectively positioned at the periphery of the valve core, along the axial direction of the valve core, the first sealing component and the second sealing component are positioned at two sides of the valve core seat, and the valve core comprises an inclined section matched with the valve port, along the axial direction of the valve core, the section width of the inclined section gradually decreases from top to bottom, the electronic expansion valve is provided with two valve ports along the axial direction, the first valve port is positioned on the valve core seat, the second valve port is positioned on the second sealing component, the valve core can move close to or far away from the first valve port, the first valve port is positioned at the inner diameter of the second valve port, the valve port is larger than the first valve port, the valve port is positioned at the inner diameter of the valve core material, and the second valve port is in a hardness state is larger than the valve core material.
Further, the first valve port is made of stainless steel.
Further, the second valve port is made of polytetrafluoroethylene.
Further, the valve spool also includes a second angled section abutting the first valve port at a greater angle of inclination adjacent the angled section.
Further, the second seal assembly includes a second seal ring and a second rubber O-ring, the second seal ring being L-shaped, the second rubber O-ring being placed in a recess of the second seal ring L-shape.
Further, the first seal assembly includes a first seal ring and a first rubber O-ring, the first seal ring being L-shaped, the first rubber O-ring being placed in a recess of the first seal ring L-shape.
Further, the second seal assembly also includes a connector fixedly connected to the spool seat, the connector and the spool seat defining a second seal ring axial position.
Further, the electronic expansion valve further comprises a supporting piece, the supporting piece is fixedly connected with the fixing seat, the top end of the supporting piece supports the bearing, the side wall of the supporting piece is provided with a longitudinal groove, the lower end of the valve core is provided with a balance hole communicated with the inner cavity of the valve core, the nut seat comprises a lug, the side wall of the valve core is provided with a notch, the lug of the nut seat stretches into and extends out of the notch, and then stretches into the groove to prevent the nut seat and the valve core from rotating.
Optionally, the electronic expansion valve further comprises a supporting piece, the supporting piece is fixedly connected with the fixing seat, the top end of the supporting piece supports the bearing, the side wall of the supporting piece is provided with a longitudinal groove, the lower end of the valve core is provided with a balance hole communicated with the inner cavity of the valve core, the nut seat comprises a lug, the side wall of the valve core is provided with a notch, the lug of the nut seat stretches into the notch but does not stretch into the groove, the valve core is provided with a second lug, and the second lug stretches into the groove to prevent the nut seat and the valve core from rotating.
Optionally, the electronic expansion valve further comprises a supporting piece, the supporting piece is fixedly connected with the fixing seat, the top end of the supporting piece supports the bearing, the side wall of the supporting piece is provided with a longitudinal groove, the lower end of the valve core is provided with a balance hole communicated with the inner cavity of the valve core, the nut seat comprises a lug, the side wall of the valve core is provided with a notch, the lug of the nut seat stretches into the notch but does not stretch into the groove, the bushing is provided with a third lug, and the third lug stretches into the groove to prevent the nut seat and the valve core from rotating.
The utility model provides an electronic expansion valve, which comprises a valve component, wherein the valve component comprises a rotor component, a screw rod, a bearing, a valve core, a bushing, a nut seat, a first sealing component, a second sealing component, a valve core seat and a fixed seat, the valve core comprises an inclined section matched with a valve port, the cross section width of the inclined section gradually decreases from top to bottom along the axial direction of the valve core, the electronic expansion valve is provided with two valve ports along the axial direction, the first valve port is positioned on the valve core seat, the second valve port is positioned on the second sealing component, the inner diameter of the first valve port is larger than the inner diameter of the second valve port, and in the closed state of the valve core, the valve core simultaneously abuts against the first valve port and the second valve port, and the material hardness of the first valve port is larger than the material hardness of the second valve port. The first valve port can limit the axial movement of the valve core, so that the valve core is furthest protected from wearing the second valve port, the stability of the flow curve of the electronic expansion valve is ensured, and the valve core is not seriously deviated from a design value due to long-term use.
Drawings
FIG. 1 shows a schematic diagram of an electronic expansion valve according to an embodiment of the present utility model;
FIG. 2 shows a schematic view of the valve member structure of FIG. 1;
FIG. 3 shows an additional structural schematic diagram of the valve member of FIG. 1;
FIG. 4 shows a further schematic structural view of the valve member of FIG. 1;
fig. 5 shows a partially enlarged schematic structural view of fig. 2.
Reference numerals in the drawings: coil component 1, valve component 2, lead screw 21, bearing 22, nut seat 23, lug 231, valve core 24, balance hole 241, notch 242, second lug 243, inclined segment 244, second inclined segment 245, fixing base 25, bushing 26, third lug 261, rotor 27, valve core seat 28, first valve port 281, support 29, groove 291, valve body 3, first port 31, second port 32, first seal assembly 200, second seal assembly 300, first seal ring 201, first rubber O-ring 202, second seal ring 301, second rubber O-ring 302, connecting piece 303, second valve port 304
Detailed Description
The following describes embodiments of the present utility model in detail. In the description herein, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the utility model.
Referring to fig. 1, 2 and 5, according to an embodiment of the present utility model, an electronic expansion valve includes a coil part 1, a valve part 2 and a valve body 3, a part of the valve part 2 is positioned in a valve cavity formed by the valve body 3, the valve part 2 is fixedly connected with the valve body 3, the coil part 1 is positioned at the outer periphery of the valve part 2, the coil part 1 is fixedly connected with the valve body 3, and the electronic expansion valve is electrically connected with a system through the coil part 1. The coil component 1 adopts a conventional control coil, and comprises two groups of winding coils for respectively controlling the up-and-down movement of the valve core. The valve body 3 comprises a first port 31 and a second port 32, which communicate with corresponding channels of the valve member.
Referring to fig. 1, 2 and 5, fig. 5 is a schematic view of a partial enlarged structure at a of fig. 2, and the valve member 2 includes a screw 21, a bearing 22, a nut seat 23, a valve core 24, a fixing seat 25, a bushing 26, a rotor 27, and a support 29. The rotor 27 is fixedly connected with the screw rod 21, and can be fixedly connected with the screw rod 21 after being connected through a fixing plate, and a sleeve is positioned at the periphery of the rotor 27 to isolate the rotor 27 from the coil component 1. The other end of the screw rod 21 is in threaded connection with the nut seat 23, specifically, an external thread section is arranged on the outer surface of one end of the screw rod 21 connected with the nut seat 23, an internal thread section is arranged on the inner wall surface of the nut seat 23, and the screw rod 21 is in threaded fit with the inner wall surface of the nut seat 23 to realize threaded connection of the screw rod 21 and the nut seat 23. At least part of the nut seat 23 is positioned in the inner cavity of the valve core 24, the bushing 26 is positioned at the periphery of the nut seat 23, part of the bushing 26 is positioned in the inner cavity, and the bushing 26 is fixedly connected with the valve core 24 through welding.
In this embodiment, the valve component 2 further includes a first sealing component 200, a second sealing component 300, and a valve core seat 28, the lower end of the fixing seat 25 is fixedly connected with the valve core seat 28, the second sealing component 300 is fixedly connected with the valve core seat, the center of the fixing seat is provided with a first installation cavity, the first sealing component is located in the first installation cavity, the first sealing component and the second sealing component are located at the periphery of the valve core respectively, along the axial direction of the valve core, the first sealing component and the second sealing component are located at two sides of the valve core seat.
The first seal assembly 200 includes a first seal assembly including a first seal ring 201 and a first rubber O-ring 202, the first seal ring being L-shaped, the first rubber O-ring being disposed in a recess of the first seal ring L-shape, the first seal ring 201 conforming to the outer periphery of the valve core, the valve core seat 28 preventing the first seal assembly 200 from being dislodged, the valve core seat 28 defining both the first seal ring and the first rubber O-ring position.
The second sealing assembly 300 comprises a second sealing ring 301, a second rubber O-shaped ring 302 and a connecting piece 303, wherein the second sealing ring is L-shaped, the second rubber O-shaped ring is placed in an L-shaped concave part of the second sealing ring, the connecting piece is fixedly connected with the valve core seat, the connecting piece and the valve core seat compress the second sealing ring to limit the axial position of the second sealing ring, and the connecting piece simultaneously limits the positions of the second sealing ring 301 and the second rubber O-shaped ring 302.
In this embodiment, the valve core 24 includes an inclined section 244 matched with the valve port, the cross-sectional width of the inclined section gradually decreases from top to bottom along the axial direction of the valve core, the electronic expansion valve has two valve ports along the axial direction, the first valve port 281 is located on a valve core seat, the second valve port 304 is located on a second sealing component, the valve core can move close to or far away from the first valve port and the second valve port, the inner diameter of the first valve port is larger than that of the second valve port, in the closed state of the valve core, part of the valve core can pass through the first valve port, the valve core can simultaneously abut against the first valve port and the second valve port, the material hardness of the first valve port is larger than that of the second valve port, the first valve port and the valve core seat are integrated into a whole, and the second valve port is made of plastic materials such as polytetrafluoroethylene material or nylon material. When the valve core moves to a closed state, the valve core is firstly abutted against the second valve port, the valve core continuously moves to be abutted against the first valve port, the first valve port is made of stainless steel, the valve core can be limited to continuously move downwards, and the second valve port is prevented from being excessively deformed and damaged. In this embodiment, the valve core includes the second inclined section 245 adjacent to the inclined section 244 and having a larger inclination angle to abut against the first valve port 281, and in the closed state of the valve core, the contact surface between the second inclined section 245 and the first valve port is larger, so that serious abrasion can be prevented. The inclination angle is defined as the included angle with the central axis of the valve core.
In this embodiment, the supporting member 29 is fixedly connected to the upper end of the fixing seat 25, the top end of the supporting member supports the bearing 22, the side wall of the supporting member has a longitudinal groove 291, the lower end of the valve core has a balancing hole 241 to communicate with the inner cavity of the valve core, the nut seat 23 includes a lug 231, the side wall of the valve core has a notch 242, and the lug 231 of the nut seat extends into the notch and extends out of the notch and into the groove 291 to prevent the nut seat and the valve core from rotating.
In this embodiment, the lug 231 of the nut seat extends out of the notch 242 and into the groove 291 to prevent the nut seat and the valve core from rotating, or the scheme shown in fig. 3 may be adopted, the nut seat includes the lug 231, the side wall of the valve core has the notch 242, the lug 231 of the nut seat extends into the notch 242 but does not extend into the groove 291, the valve core has the second lug 243, the second lug 243 extends into the groove 291 to prevent the valve core from rotating, and the nut seat and the valve core do not rotate due to the cooperation of the notch, so that the nut seat and the valve core cannot rotate.
In this embodiment, the lug 231 of the nut seat extends out of the notch 242 and into the groove 291 to prevent the nut seat and the valve core from rotating, or the scheme shown in fig. 4 may be adopted, the nut seat includes the lug 231, the side wall of the valve core has the notch 242, the lug 231 of the nut seat extends into the notch 242 but does not extend into the groove 291, the bushing has the third lug 261, the third lug 261 extends into the groove to prevent the valve core from rotating, and the nut seat and the valve core do not rotate due to the cooperation of the notch, so that the nut seat and the valve core cannot rotate.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. The electronic expansion valve comprises a valve component, wherein the valve component comprises a rotor, a screw rod, a bearing, a valve core, a bushing, a nut seat, a first sealing component, a second sealing component, a valve core seat and a fixed seat, the rotor is fixedly connected with the screw rod, the rotor can drive the screw rod to rotate, the screw rod is in threaded connection with the nut seat, and the bearing is positioned at the periphery of the screw rod; the valve core top is provided with an inner cavity comprising a step, at least part of the lining is positioned in the inner cavity, at least part of the nut seat is positioned in the inner cavity, the lining is fixedly connected with the valve core top, the fixing seat is fixedly connected with the valve core seat, the second sealing component is fixedly connected with the valve core seat, the fixing seat is provided with a first mounting cavity, the first sealing component is positioned in the first mounting cavity, the first sealing component and the second sealing component are respectively positioned at the periphery of the valve core, along the axial direction of the valve core, the first sealing component and the second sealing component are positioned at two sides of the valve core seat, the valve core comprises an inclined section matched with the valve core, along the axial direction of the valve core, the section width of the inclined section is gradually reduced from top to bottom, the electronic expansion valve is provided with two valve ports along the axial direction, the first valve port is positioned on the valve core seat, the second valve port is positioned on the second sealing component, the valve core can move close to or far away from the first inner diameter and the second valve port, the first valve port is larger than the first valve port, the second valve port is positioned at the second valve port is in a state of being in which the valve core material is closed, and the hardness of the valve core is simultaneously.
2. The electronic expansion valve of claim 1, wherein the first port material is stainless steel.
3. The electronic expansion valve of claim 1, wherein the second port material is polytetrafluoroethylene.
4. The electronic expansion valve of claim 1, wherein the valve spool further comprises a second angled section adjacent the angled section that abuts the first valve port at a greater angle of inclination.
5. The electronic expansion valve of claim 1, wherein the second seal assembly comprises a second seal ring and a second rubber O-ring, the second seal ring being L-shaped, the second rubber O-ring being disposed in a recess of the second seal ring L-shape.
6. The electronic expansion valve of claim 1, wherein the first seal assembly comprises a first seal ring and a first rubber O-ring, the first seal ring being L-shaped, the first rubber O-ring being disposed in a recess of the first seal ring L-shape.
7. The electronic expansion valve of claim 5, wherein the second seal assembly further comprises a connector fixedly coupled to the valve cartridge seat, the connector and the valve cartridge seat defining a second seal ring axial position.
8. The electronic expansion valve of claim 1, further comprising a support member fixedly connected to the mounting base, wherein the support member top supports the bearing, wherein the support member side wall has a longitudinal groove, wherein the lower end of the valve core has a balance hole communicating with the valve core cavity, wherein the nut seat comprises a ledge, wherein the valve core side wall has a notch, wherein the ledge of the nut seat extends into and out of the notch and then into the groove to prevent rotation of the nut seat and the valve core.
9. The electronic expansion valve of claim 1, further comprising a support member fixedly connected to the mounting base, the support member top supporting the bearing, the support member side wall having a longitudinal groove, the spool lower end having a balance hole communicating with the spool bore, the nut seat including a ledge, the spool side wall having a notch, the ledge of the nut seat extending into the notch but not extending into the groove, the spool having a second ledge extending into the groove preventing rotation of the nut seat and the spool.
10. The electronic expansion valve of claim 1, further comprising a support member fixedly connected to the mounting base, the support member top supporting the bearing, the support member side wall having a longitudinal groove, the spool lower end having a balance hole communicating with the spool bore, the nut seat including a ledge, the spool side wall having a notch, the ledge of the nut seat extending into the notch but not extending into the groove, the bushing having a third ledge extending into the groove preventing rotation of the nut seat and the spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320436945.2U CN219796160U (en) | 2023-03-03 | 2023-03-03 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320436945.2U CN219796160U (en) | 2023-03-03 | 2023-03-03 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219796160U true CN219796160U (en) | 2023-10-03 |
Family
ID=88185911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320436945.2U Active CN219796160U (en) | 2023-03-03 | 2023-03-03 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219796160U (en) |
-
2023
- 2023-03-03 CN CN202320436945.2U patent/CN219796160U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |