CN203642567U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN203642567U CN203642567U CN201320792423.2U CN201320792423U CN203642567U CN 203642567 U CN203642567 U CN 203642567U CN 201320792423 U CN201320792423 U CN 201320792423U CN 203642567 U CN203642567 U CN 203642567U
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- China
- Prior art keywords
- valve
- valve head
- connecting rod
- head connecting
- hole
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- 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.)
- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 claims abstract description 54
- 230000000670 limiting effect Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
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Classifications
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- 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
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- Electrically Driven Valve-Operating Means (AREA)
Abstract
The utility model discloses an electronic expansion valve which comprises a motor part, a connecting member, a valve core part and a valve body part. The valve core part comprises a screw sleeve, a valve core body, a valve head component and a pretightening spring, the valve head component comprises a valve head connecting rod, a valve head, a sealing pad and a threaded retaining ring, the screw sleeve is in threaded fixed connection with the valve core body, the valve head connecting rod is mounted in the valve core body, the threaded retaining ring is in threaded fixed connection with the valve head connecting rod, the sealing pad is mounted to the valve head connecting rod in a sleeved manner and axially limited by the threaded retaining ring, the valve head and the valve head connecting rod are in threaded connection, and the threaded retaining ring compresses the sealing pad. When the sealing pad contacts with a valve seat, and after first-layer sealing of a valve body is realized, a sealing face of the valve core body contacts with the sealing pad to close a bypass channel and prevent internal leakage, and second-layer sealing of the valve body is realized. Multi-channel sealing in the prior art is changed into one-channel sealing, so that leakage probability is lowered.
Description
Technical field:
The utility model relates to electronic expansion valve technology field, relates in particular to a kind of electronic expansion valve that is applied to central air conditioner main machine.
Background technology:
Electric expansion valve is the vitals of composition refrigeration system, is to remove another basic element of character outside evaporimeter, compressor and condenser in four basic elements of character of refrigeration system, plays adjust flux with the control system degree of superheat.
In the prior art, the Chinese patent that is 200580023202.7 as China Patent No. discloses a kind of electric expansion valve; This electric expansion valve comprises motor component, connector, valve hole part, valve part, and valve hole part is arranged at the cavity that attaching parts and valve part form.Screw sleeve coordinates with drive screw screw thread pair, and is arranged at the radially position-limiting action of stop collar in motor component, and therefore, when at valve port closing direction rotary screw, valve hole part travels forward vertically in the cavity of place.Close port in the time of sealing gasket contact valve seat, now screw rod makes screw sleeve travel forward with respect to valve core in the lasting rotation of valve port closing direction, until screw sleeve head contacts and closes bypass channel with valve core protuberance, closes whole valve with this.But existing this electric expansion valve has following defect: 1, to close bypass channel be to contact sealing by screw sleeve is anterior with valve core protuberance face to prior art, and sealing effectiveness is bad; 2, prior art prevents that internal leakage from need to seal by following several places: the sealing of sealing, sealing gasket and the valve port of sealing, valve head sealing ring and the sealing gasket of sealing, screw sleeve head and the valve core protuberance of axial sealing ring and connector, the multiple-sealed leakage probability that causes is larger.Therefore be necessary to be improved.
Utility model content:
The deficiency existing for prior art, the purpose of this utility model is to provide a kind of electric expansion valve, and it has solved the larger problem of valve internal leakage probability.
To achieve these goals, the technical scheme that the utility model adopts is:
A kind of electric expansion valve, comprise motor component, connector, valve hole part, valve part, described valve hole part comprises screw sleeve, valve core, valve head assembly and preloading spring, described valve head assembly comprises valve head connecting rod, valve head, sealing gasket and threaded collar, described screw sleeve and valve core screw thread are connected, described valve head connecting rod is loaded in described valve core, described threaded collar and valve head connecting rod screw thread are connected, described sealing gasket is set in valve head connecting rod, sealing gasket is subject to threaded collar axial limiting, described valve head is threaded with valve head connecting rod, threaded collar press seal pad.
Further in technical scheme, described screw sleeve is Step Shaft shape, and the top shaft shoulder is special-shaped axis, and bottom arranges matching thread axle, inside is provided with the working thread through hole being used in conjunction with screw rod, is provided with some balance through holes at described working thread through hole and described matching thread between centers.
Further in technical scheme, described valve core outside is cylindric, inner upper end is provided with the mate with threaded holes coordinating with the matching thread axle of described screw sleeve, described mate with threaded holes lower end is provided with boss, described boss lower end is respectively arranged with pilot hole, installing hole and sealing surface, the upper end of valve head connecting rod is provided with a step shaft shoulder, and the step shaft shoulder is subject to described boss axial limiting.
Further in technical scheme, described valve head connecting rod is Step Shaft shape, outside is respectively arranged with the spacing shaft shoulder, guiding optical axis, by-pass prot and thread spindle from top to bottom, inside is respectively arranged with screw rod work cavity and through hole from top to bottom, on the described spacing shaft shoulder, be provided with the open slot for assembling, described guiding optical axis runs through described pilot hole, and the described spacing shaft shoulder is subject to described boss axial limiting.
Further, in technical scheme, described spacing shaft shoulder external diameter is greater than described pilot hole, and the described spacing shaft shoulder is circular shaft shape or special-shaped axis shape.
Further in technical scheme, described preloading spring is arranged in the cavity that described valve head connecting rod and described valve core installing hole form, and the external diameter of preloading spring is less than the internal diameter of described installing hole and is greater than the lead external diameter of optical axis of described valve head connecting rod.
Further, in technical scheme, described threaded collar inside is provided with the screwed hole coordinating with the thread spindle of valve head connecting rod, outer setting assembling special-shaped axis.
Further, in technical scheme, described sealing gasket is loaded between described threaded collar and valve head, its outside for cylindric, that inside is step is poroid.
Further, in technical scheme, described valve head outside is round end structure, and inside is provided with and valve head connecting rod thread spindle threaded engagement screwed hole, below described screwed hole, is provided with pilot hole.
Adopt after said structure, the advantage that compared to the prior art the utility model had is: the utility model is simple in structure, design ingenious, when sealing gasket contacts with valve seat, to realize after the sealing of valve body ground floor, screw rod is rotated further, valve core moves with respect to valve head assembly, valve core sealing surface is contacted with sealing gasket, to reach the object of closing bypass channel and prevent internal leakage, realize the sealing of the valve body second layer.The utility model, by the multiple-sealed single track sealing that becomes of the prior art, has reduced the probability leaking.
Brief description of the drawings:
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Fig. 3 is the structural representation of valve hole part of the present utility model.
Fig. 4 is the decomposing schematic representation of valve hole part of the present utility model.
Fig. 5 is the scheme of installation of valve hole part of the present utility model.
Detailed description of the invention:
The following stated is only preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
Embodiment, see shown in Fig. 1 to Fig. 5, a kind of electric expansion valve, comprise motor component 1, connector 2, valve hole part 3, valve part 4, valve hole part 3 comprises screw sleeve 31, valve core 32, valve head assembly 33 and preloading spring 34, valve head assembly comprises valve head connecting rod 331, valve head 332, sealing gasket 333 and threaded collar 334, it is characterized in that: screw sleeve 31 is connected with valve core 32 screw threads, valve head connecting rod 331 is loaded in valve core 32, threaded collar 334 is connected with valve head connecting rod 331 screw threads, sealing gasket 333 is set in valve head connecting rod 331, sealing gasket 333 is subject to threaded collar 334 axial limitings, valve head 332 is threaded with valve head connecting rod 331, threaded collar 334 press seal pads 333.
Valve head connecting rod 331 is Step Shaft shape, outside is respectively arranged with spacing shaft shoulder 331c, guiding optical axis 331f, by-pass prot 331b and thread spindle 331d from top to bottom, inside is respectively arranged with screw rod 11 work cavity 331g and through hole 331a from top to bottom, on spacing shaft shoulder 331c, be provided with the open slot 331e for assembling, guiding optical axis 331f runs through pilot hole 323, and spacing shaft shoulder 331c is subject to boss 322 axial limitings.Spacing shaft shoulder 331c external diameter is greater than pilot hole 323, and spacing shaft shoulder 331c is circular shaft shape or special-shaped axis shape.
Preloading spring 34 is arranged in the cavity that valve head connecting rod 331 and valve core installing hole 324 form, and the external diameter of preloading spring 34 is less than the internal diameter of installing hole 324, and the internal diameter of preloading spring 34 is greater than the external diameter of valve head connecting rod guiding optical axis 331f.Threaded collar 334 inside are provided with the screwed hole 334a coordinating with the thread spindle 331d of valve head connecting rod, outer setting assembling special-shaped axis 334b.Sealing gasket 333 is loaded between threaded collar 334 and valve head 332, its outside for cylindric, that inside is step is poroid.Valve head 332 outsides are round end structure, and inside is provided with and valve head connecting rod thread spindle 331d threaded engagement screwed hole 332a, is provided with pilot hole 322b below screwed hole 332a.
The utility model is provided with upper boss 322 on the top of valve core 32, is provided with valve core sealing surface 321 in the bottom of valve core 32; Valve head connecting rod 331 ends of thread run through valve core boss hole 323, the other end step shaft shoulder is subject to upper boss 322 axial limitings, threaded collar 334 is connected with valve head connecting rod 331 screw threads, sealing gasket 333 is set in valve head connecting rod 331 and is subject to threaded collar 334 axial limitings, valve head 332 is threaded with valve head connecting rod 331, thereby sealing gasket 333 is pressed on valve head 332 to composition valve head assembly 33; Between valve head assembly 33 and valve core 32, have preloading spring 34, thus valve core 32 can be relatively and valve head assembly 33 do the axially-movable of small distance; When work, the stepper motor arranging in motor component 1 is connected with controller, controller sends instruction according to the induction result of sensor, control step motor rotation, stepper motor is by after train of reduction gears deceleration force amplifier square, pass torque to drive screw, after drive screw 11 and screw sleeve 31 screw thread pair effects, drive valve hole part 3 to move up and down vertically, in the time that valve pulse is closed in input, valve hole part 3 axles move downward, and fit with valve seat 42 gradually in sealing gasket 333 lower surfaces, close port 41, forms ground floor sealing; Continue input and close valve pulse, the relative valve seat 42 of sealing gasket 333 cannot move on, but preloading spring 34 can compress, the valve head assembly 33 that valve core 32 is relative is travelled forward, valve core sealing surface 321 is contacted with sealing gasket 333 tops, close bypass channel 331b, form second layer sealing.In the time that valve pulse is opened in input, valve hole part 3 axles move upward, and due to the elastic reaction of spring 34, the valve head assembly 33 in valve core 32 are moved backward, thereby valve core sealing surface 321 departs from sealing gasket 333 tops, opens bypass channel.Now, by bypass channel 331b, valve head connecting rod endoporus 331a, valve head endoporus 332a and pilot hole 332b, valve channel 43 and 44 is communicated with, to reduce out valve pressure reduction; Continue input and open valve pulse, after valve core upper boss 322 contacts with valve head connecting rod upper boss 331c, valve core 32 cannot continue motion with respect to valve head assembly 33, and now valve hole part 3 moves vertically, sealing gasket 333 bottoms and valve seat 42 are departed from, complete out valve.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (9)
1. an electric expansion valve, comprise motor component (1), connector (2), valve hole part (3), valve part (4), described valve hole part (3) comprises screw sleeve (31), valve core (32), valve head assembly (33) and preloading spring (34), described valve head assembly comprises valve head connecting rod (331), valve head (332), sealing gasket (333) and threaded collar (334), it is characterized in that: described screw sleeve (31) is connected with valve core (32) screw thread, described valve head connecting rod (331) is loaded in described valve core (32), described threaded collar (334) is connected with valve head connecting rod (331) screw thread, described sealing gasket (333) is set in valve head connecting rod (331), sealing gasket (333) is subject to threaded collar (334) axial limiting, described valve head (332) is threaded with valve head connecting rod (331), threaded collar (334) press seal pad (333).
2. a kind of electric expansion valve according to claim 1, it is characterized in that: described screw sleeve (31) is Step Shaft shape, the top shaft shoulder is special-shaped axis (311), bottom arranges matching thread axle (312), inside is provided with the working thread through hole (313) being used in conjunction with screw rod (11), between described working thread through hole (313) and described matching thread axle (312), is provided with some balance through holes (314).
3. a kind of electric expansion valve according to claim 2, it is characterized in that: described valve core (32) outside is cylindric, inner upper end is provided with the mate with threaded holes (325) coordinating with the matching thread axle (312) of described screw sleeve, described mate with threaded holes (325) lower end is provided with boss (322), described boss (322) lower end is respectively arranged with pilot hole (323), installing hole (324) and sealing surface (321), the upper end of valve head connecting rod (331) is provided with a step shaft shoulder (331c), the step shaft shoulder (331c) is subject to described boss (322) axial limiting.
4. a kind of electric expansion valve according to claim 3, it is characterized in that: described valve head connecting rod (331) is Step Shaft shape, outside is respectively arranged with the spacing shaft shoulder (331c) from top to bottom, guiding optical axis (331f), by-pass prot (331b) and thread spindle (331d), inside is respectively arranged with screw rod (11) work cavity (331g) and through hole (331a) from top to bottom, on the described spacing shaft shoulder (331c), be provided with the open slot (331e) for assembling, described guiding optical axis (331f) runs through described pilot hole (323), the described spacing shaft shoulder (331c) is subject to described boss (322) axial limiting.
5. a kind of electric expansion valve according to claim 4, is characterized in that: the described spacing shaft shoulder (331c) external diameter is greater than described pilot hole (323), and the described spacing shaft shoulder (331c) is circular shaft shape or special-shaped axis shape.
6. a kind of electric expansion valve according to claim 5, it is characterized in that: described preloading spring (34) is arranged in the cavity that described valve head connecting rod (331) and described valve core installing hole (324) form, and the external diameter of preloading spring (34) is less than the internal diameter of described installing hole (324) and is greater than the external diameter of described valve head connecting rod guiding optical axis (331f).
7. a kind of electric expansion valve according to claim 6, is characterized in that: described threaded collar (334) inside is provided with the screwed hole (334a) coordinating with the thread spindle (331d) of valve head connecting rod, outer setting assembling special-shaped axis (334b).
8. a kind of electric expansion valve according to claim 7, is characterized in that: described sealing gasket (333) is loaded between described threaded collar (334) and valve head (332), its outside for cylindric, that inside is step is poroid.
9. a kind of electric expansion valve according to claim 8, it is characterized in that: described valve head (332) outside is round end structure, inside is provided with and valve head connecting rod thread spindle (331d) threaded engagement screwed hole (332a), is provided with pilot hole (322b) in described screwed hole (332a) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320792423.2U CN203642567U (en) | 2013-12-04 | 2013-12-04 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320792423.2U CN203642567U (en) | 2013-12-04 | 2013-12-04 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203642567U true CN203642567U (en) | 2014-06-11 |
Family
ID=50873805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320792423.2U Expired - Lifetime CN203642567U (en) | 2013-12-04 | 2013-12-04 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203642567U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413938A (en) * | 2020-12-07 | 2021-02-26 | 浙江农林大学暨阳学院 | Automobile air conditioner thermal expansion valve |
| CN108343749B (en) * | 2017-01-24 | 2021-12-21 | 浙江盾安机械有限公司 | Electronic expansion valve |
-
2013
- 2013-12-04 CN CN201320792423.2U patent/CN203642567U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343749B (en) * | 2017-01-24 | 2021-12-21 | 浙江盾安机械有限公司 | Electronic expansion valve |
| CN112413938A (en) * | 2020-12-07 | 2021-02-26 | 浙江农林大学暨阳学院 | Automobile air conditioner thermal expansion valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |
|
| CX01 | Expiry of patent term |