CN204153183U - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
- Publication number
- CN204153183U CN204153183U CN201420582948.8U CN201420582948U CN204153183U CN 204153183 U CN204153183 U CN 204153183U CN 201420582948 U CN201420582948 U CN 201420582948U CN 204153183 U CN204153183 U CN 204153183U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- valve
- sleeve
- needle
- core
- 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.)
- Expired - Lifetime
Links
- 238000005057 refrigeration Methods 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009527 percussion Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003466 welding 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 a kind of electric expansion valve, and it comprises: the first valve seat; Second valve seat, is provided with primary valve; Horizontal adapter; Vertical joint pipe; With the sleeve of the second valve seat one, sleeve lateral wall is provided with first-class circulation passage and second circulation passage; Valve seat core, is slidably disposed in described sleeve, comprises spool bore; Needle, is axially movably located in sleeve along sleeve; Nut, be located in described first valve seat, the second end of sleeve is located in nut; Screw rod, the movement direction along needle is reciprocally screwed onto in nut; First-class circulation passage when primary valve opened by valve seat core by the intracavity inter-connection of primary valve and the first valve seat; Second circulation passage when primary valve closed by valve seat core by the intracavity inter-connection of barrel bore and the first valve seat; Be provided with between needle and valve seat core and limit valve seat mandrel to the stop configurations of moving.The utility model electric expansion valve, the coaxality between the spool bore that effectively can ensure needle and valve seat core, improves service behaviour and working life.
Description
Technical field
The utility model relates to electric expansion valve, is especially applied to the electric expansion valve in the refrigeration system such as air conditioner, refrigerator.
Background technique
At air-conditioning market, due to its indoor set and outdoor unit distant, therefore generally can adopt two electric expansion valves, and these two electric expansion valves must distinguish one-way valve in parallel, so could improve the working efficiency of air-conditioning system to greatest extent.
In the process of electric expansion valve work, when refrigeration agent forward flow, first can open needle, flow out from the primary valve little valve seat after the spool bore then on valve seat core.When refrigeration agent reverse flow, there will be refrigeration agent temporary impact valve seat core, valve seat core is slided in little valve seat, and then impact needle.
Model utility content
The purpose of this utility model is to provide a kind of electric expansion valve, and can reduce the impact to needle, processing cost is lower.
For solving the problems of the technologies described above, the utility model provides a kind of electric expansion valve, and it comprises: the first valve seat; Second valve seat, is fixedly connected on the first end end of described first valve seat, and described second valve seat is provided with primary valve; Horizontal adapter, is communicated to the inner chamber of described first valve seat; Vertical joint pipe, is fixedly connected on the exit position of described primary valve; Sleeve, is integrated with described second valve seat, the sidewall of described sleeve runs through respectively being provided with first-class circulation passage and second circulation passage along the direction away from described second valve seat; Valve seat core, is slidably disposed in described sleeve, and to open or to close described primary valve, the axis that described valve seat core comprises along described sleeve extends and the spool bore of through described valve seat core, and described spool bore is communicated with the inner chamber of described primary valve and described sleeve; Needle, is axially movably arranged in described sleeve corresponding to the spool bore of described valve seat core along described sleeve; Nut, is arranged in described first valve seat, and the second end of described sleeve is arranged in described nut; Screw rod, the movement direction along described needle is reciprocally screwed onto in described nut, drives described needle to move to open or close described spool bore along the glide direction of described valve seat core; Described first-class circulation passage when described primary valve opened by described valve seat core by the intracavity inter-connection of described primary valve and described first valve seat; Described second circulation passage when described primary valve closed by described valve seat core by the intracavity inter-connection of the inner chamber of described sleeve and described first valve seat; The stop configurations of the axial motion limiting described valve seat core is provided with between described needle and described valve seat core.
Further, described stop configurations is outstanding raised from the inner circle wall of described sleeve to center.
Further, the inner circle wall of described sleeve is provided with draw-in groove, described stop configurations is be embedded the snap ring in described draw-in groove.
Further, the inwall of described sleeve is provided with snap ring hole, described stop configurations is be located in the snap ring in described snap ring hole.
Further, described snap ring hole is two, and the snap ring hole line of centres, away from sleeve centerline, does not stop needle.
Further, described second circulation passage is arranged on the side away from described valve seat core of described stop configurations.
Further, described second circulation passage is arranged on the side of the close described valve seat core of described stop configurations.
Further, when described valve seat core is for opening primary valve state, needle cut-off valve core bore.
Further, when described valve seat core is for opening primary valve state, needle is cut-off valve core bore not.
Electric expansion valve of the present utility model, by the second valve seat and the processing of sleeve one, needle and valve seat core are arranged within same sleeve, needle and valve seat core is made to share same independent sleeve, the coaxality of needle and valve seat core is ensured by the coaxality of sleeve itself, and between needle and valve seat core, avoid excess impact by Stop structure, the difficulty of processing of needle and valve seat core can not only be reduced, reduce the processing cost of whole electric expansion valve, and effectively can ensure that needle and valve seat core have good coaxality, improve service behaviour and working life.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the utility model first embodiment electric expansion valve;
Fig. 2 is the Stop structure sectional structure schematic diagram of electric expansion valve in Fig. 1;
Fig. 3 is the Stop structure schematic diagram of the utility model second embodiment electric expansion valve;
Fig. 4 is the Stop structure schematic diagram of the utility model the 3rd embodiment's electric expansion valve.
Reference character in figure: 10, the first valve seat; 20, the second valve seat; 30, valve seat core; 40, horizontal adapter; 50, vertical joint pipe; 60, needle; 70, nut; 80, screw rod; 90, sleeve; 21, primary valve; 31, spool bore; 91, first-class circulation passage; 92, second circulation passage; 93, stop configurations; 94, draw-in groove.
Embodiment
Below embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Please refer to the first embodiment of the utility model electric expansion valve shown in Fig. 1 and Fig. 2, described electric expansion valve comprises the first valve seat 10, second valve seat 20, valve seat core 30, horizontal adapter 40, vertical joint pipe 50, needle 60, nut 70, screw rod 80 and sleeve 90.First valve seat 10 has inner chamber, and miscellaneous part is arranged in the first valve seat 10.
Second valve seat 20 is fixedly connected on the first end end of the first valve seat 10, and the second valve seat 20 is provided with primary valve 21, and this primary valve 21 is along through whole second valve seat 20 of axial direction of sleeve 90.
Horizontal adapter 40 is communicated to the inner chamber of the first valve seat 10; Vertical joint pipe 50 is fixedly connected on the exit position of primary valve 21, and is communicated to the inner chamber of the second valve seat 20 by primary valve 21.
Sleeve 90, be integrated with described second valve seat 20, the sidewall of sleeve 90 runs through respectively along the direction away from the second valve seat 20 and is provided with first-class circulation passage 91 and second circulation passage 92, first-class circulation passage 91 and second circulation passage 92 all for the intracavity inter-connection by the inner chamber of sleeve 90 and the first valve seat 10, first-class circulation passage 91 when primary valve 21 opened by valve seat core 30 by the intracavity inter-connection of primary valve 21 and the first valve seat 10; Second circulation passage 92 when primary valve 21 closed by valve seat core 30 by the intracavity inter-connection of the inner chamber of sleeve 90 and the first valve seat 10.Preferably, first-class circulation passage 91 and second circulation passage 92 are the circular hole that the radial direction along sleeve 90 is arranged, and multiple first-class circulation passage 91 is arranged along the circumferential uniform intervals of sleeve 90, and multiple second circulation passage 92 is arranged along the circumferential uniform intervals of sleeve 90.Sleeve 90 ensure that the primary valve 21 of the second valve seat 20 and the coaxality of sleeve 90 with the design of described second valve seat 20 one, then improve the primary valve 21 of the second valve seat 20 and the coaxality of valve seat core 30, strengthen the matching relationship between valve seat core 30 and the primary valve 21 of the second valve seat 20, ensure that refrigeration agent is from valve seat core 30 smooth flow to primary valve 21.Valve seat core 30 is slidably disposed in sleeve 90, to open or to close primary valve 21.The axis that valve seat core 30 comprises along sleeve 90 extends and the spool bore 31 of through valve seat core 30, and spool bore 31 is communicated with the inner chamber of primary valve 21 and sleeve 90.
Needle 60 is arranged accordingly with the spool bore 31 of valve seat core 30, and being axially movably arranged in sleeve 90 along sleeve 90.Needle 60 and valve seat core 30 are arranged in sleeve 90 all movably, and are led by sleeve 90.Because needle 60 and valve seat core 30 share same sleeve 90, therefore the coaxality of needle 60 and valve seat core 30 can be ensured by sleeve 90, and then ensure that needle 60 and valve seat core 30 can not be partial in movement process, also the cooperation between the spool bore 31 that just ensure that needle 60 and valve seat core 30 well, make needle 60 can seal valve core bore 31 preferably, or the size of mediation valve core bore 31 opening, improves the validity of electric expansion valve.Based on this, in the process of processing, only need to ensure the machining accuracy of sleeve 90 and needle 60 and the coaxality between valve seat core 30 and sleeve 90, reduce the requirement on machining accuracy of nut and screw rod cooperating structure, reduce the processing cost of whole electric expansion valve.
Nut 70 is arranged in the first valve seat 10; Screw rod 80 is reciprocally screwed onto in nut 70 along the movement direction of needle 60, and drives with needle 60 and be connected, and valve needle 60 moves to open or cut-off valve core bore 31 along the glide direction of valve seat core 30.By the gap between adjustment needle 60 and spool bore 31, the effect of Flow-rate adjustment can be played.
When refrigeration agent forward flow, the inner chamber of the first valve seat 10 is entered from horizontal adapter 40, now valve seat core 30 is in the position closing primary valve 21, first-class circulation passage 91 is blocked by valve seat core 30, refrigeration agent cannot enter in primary valve 21 via first-class circulation passage 91 from the inner chamber of the first valve seat 10, and thus horizontal adapter 40 cannot be connected with between vertical joint pipe 50 by first-class circulation passage 91.But because the inner chamber of the first valve seat 10 also can be communicated with primary valve 21 by spool bore 31, therefore refrigeration agent now can also enter the inner chamber of sleeve 90 after the second circulation passage 92 sleeve 90 from the inner chamber of the first valve seat 10, then primary valve 21 is flowed to from spool bore 31, then vertical joint pipe 50 is entered, realize being communicated with of horizontal adapter 40 and vertical joint pipe 50, now by the aperture regulating the position of needle 60 to carry out modulating valve core bore 31, the Flow-rate adjustment to refrigeration agent can be realized.Be provided with the stop configurations 93 of the axial motion limiting valve seat core 30 between needle 60 and valve seat core 30, this stop configurations can form backstop action to the axial motion of valve seat core 30.
When refrigeration agent reverse flow, can enter in primary valve 21 from vertical joint pipe 50, now under the percussion of refrigeration agent, axial motion is there is in valve seat core 30 to the direction away from primary valve 21, first-class circulation passage 91 is opened, refrigeration agent enters the inner chamber of the first valve seat 10 through first-class circulation passage 91, then flows out through horizontal adapter 40.In the process of valve seat core 30 axial motion, after moving to certain distance, reach the position at stop configurations 93 place, due to the barrier effect of stop configurations 93, can not continue to move vertically, therefore can not causing greater impact to needle 60, also with regard to avoiding after needle 60 is impacted, the cooperating structure of nut 70 and screw rod 80 being impacted, and then the problem causing screw rod 80 stuck.
In order to the percussion that the cooperating structure reducing needle 60 pairs of nuts 70 and screw rod 80 better causes, preferably, also buffer structure is provided with between needle 60 and screw rod 80, this buffer structure is such as spring, after needle 60 is impacted, can first come to form buffering to the percussion of needle 60 by spring, therefore can reduce the impact that needle 60 may cause further, improve safety and reliability when electric expansion valve uses.
For the utility model, stop configurations 93 on described sleeve 90 can have various ways, such as, be snap ring in the first embodiment, when stop configurations 93 is snap ring, the inner circle wall of sleeve 90 is correspondingly provided with draw-in groove 94, snap ring is embedded in this draw-in groove 94, thus forms axial limiting (as shown in Figure 2) to snap ring; Or also can punching press be formed raised (the second embodiment as shown in Figure 3) outstanding from the inner circle wall of sleeve 90 to center, preferably, above-mentioned projection is annular projection.
Preferably, in above-mentioned each embodiment, second circulation passage 92 is arranged on the side away from valve seat core 30 of stop configurations 93.Meanwhile, under the better connecting plate being located at nut and valve seat, produce because magnet rotor long-term work has powder, the fluid that this measure can reduce sprue and magnet rotor space as far as possible flows.When refrigeration agent reverse flow, the refrigerant pressure of vertical joint pipe 50 one end is larger, the inner chamber of the first valve seat 10 is entered after flowing through first-class circulation passage 91, now because second circulation passage 92 is arranged on the side away from valve seat core 30 of stop configurations 93, therefore valve seat core 30 can not move to the position at second circulation passage 92 place, also would not result in blockage to second circulation passage 92, thus refrigeration agent can enter the inner chamber of sleeve 90 through second circulation passage 92 from the inner chamber of the first valve seat 10, the refrigerant pressure at valve seat core 30 two ends is made to realize balance, the impact forces of refrigeration agent to valve seat core 30 can be reduced further, and then reduce refrigeration agent to the impact forces of needle 60.Certainly, described second circulation passage 92 also can be arranged on the side (the 3rd embodiment as described in Figure 4) of the close described valve seat core 30 of described stop configurations 93.
Preferably, when primary valve 21 opened by described valve seat core 30, needle 60 can cut-off valve core bore 31.Needle still has certain impact, but impact force is little.
Preferably, the first end of sleeve 90 can directly be fixedly connected on the first valve seat 10, can ensure the structural strength between sleeve 90 and the first valve seat 10 better, improves the overall construction intensity of electric expansion valve.Can for being fixedly connected with between sleeve 90 with nut 70, now sleeve 90 can and nut 70 between for being spirally connected, also can be welding etc.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.Such as, in the above-described embodiments, when primary valve opened by valve seat core, needle cut-off valve core bore; In some other embodiment, when primary valve opened by described valve seat core, needle also can not cut-off valve core bore, such as, carry out stroke restriction by stop configurations, can ensure the impact force that valve seat core is less to needle like this.Moreover, except the Stop structure shown in Fig. 2 and Fig. 3, it can also be some other form, as long as can be construed as limiting the motion of valve seat core, as: Fig. 4, also can be provided with snap ring hole in addition on the inwall of described sleeve, described stop configurations is be located in the snap ring in described snap ring hole, described snap ring hole is specially two, and the snap ring hole line of centres, away from sleeve centerline, thus can not stop the motion of needle.It is noted herein that, no matter be projection or snap ring, all should do not counteract the motion of needle.That is, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. an electric expansion valve, is characterized in that, comprising:
First valve seat (10);
Second valve seat (20), is fixedly connected on the first end end of described first valve seat (10), and described second valve seat (20) is provided with primary valve (21);
Horizontal adapter (40), is communicated to the inner chamber of described first valve seat (10);
Vertical joint pipe (50), is fixedly connected on the exit position of described primary valve (21);
Sleeve (90), is integrated with described second valve seat (20), the sidewall of described sleeve (90) runs through respectively being provided with first-class circulation passage (91) and second circulation passage (92) along the direction away from described second valve seat (20);
Valve seat core (30), be slidably disposed in described sleeve (90), to open or to close described primary valve (21), the axis that described valve seat core (30) comprises along described sleeve (90) extends and the spool bore (31) of through described valve seat core (30), and described spool bore (31) is communicated with the inner chamber of described primary valve (21) and described sleeve (90);
Needle (60), is axially movably arranged in described sleeve (90) corresponding to the spool bore (31) of described valve seat core (30) along described sleeve (90);
Nut (70), is arranged in described first valve seat (10), and the second end of described sleeve (90) is arranged in described nut (70);
Screw rod (80), the movement direction along described needle (60) is reciprocally screwed onto in described nut (70), drives described needle (60) to move to open or close described spool bore (31) along the glide direction of described valve seat core (30);
Described first-class circulation passage (91) when described valve seat core (30) opens described primary valve (21) by the intracavity inter-connection of described primary valve (21) and described first valve seat (10);
Described second circulation passage (92) when described valve seat core (30) closes described primary valve (21) by the intracavity inter-connection of the inner chamber of described sleeve (90) and described first valve seat (10);
The stop configurations (93) of the axial motion limiting described valve seat core (30) is provided with between described needle (60) and described valve seat core (30).
2. electric expansion valve according to claim 1, is characterized in that, described stop configurations (93) is from raised outstanding to center of the inner circle wall of described sleeve (90).
3. electric expansion valve according to claim 1, is characterized in that, the inner circle wall of described sleeve (90) is provided with draw-in groove (94), and described stop configurations (93) is for being embedded the snap ring in described draw-in groove (94).
4. electric expansion valve according to claim 1, is characterized in that, the inwall of described sleeve (90) is provided with snap ring hole, and described stop configurations (93) is for being located in the snap ring in described snap ring hole.
5. electric expansion valve according to claim 4, is characterized in that, described snap ring hole is two, and the snap ring hole line of centres, away from sleeve centerline, does not stop needle.
6. the electric expansion valve according to any one of claim 1-5, is characterized in that, described second circulation passage (92) is arranged on the side away from described valve seat core (30) of described stop configurations (93).
7. the electric expansion valve according to any one of claim 1-5, is characterized in that, described second circulation passage (92) is arranged on the side of the close described valve seat core (30) of described stop configurations (93).
8. electric expansion valve according to claim 6, is characterized in that, when described valve seat core is for opening primary valve state, and needle cut-off valve core bore.
9. electric expansion valve according to claim 6, is characterized in that, when described valve seat core is for opening primary valve state, needle is cut-off valve core bore not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420582948.8U CN204153183U (en) | 2014-10-10 | 2014-10-10 | Electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420582948.8U CN204153183U (en) | 2014-10-10 | 2014-10-10 | Electric expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204153183U true CN204153183U (en) | 2015-02-11 |
Family
ID=52511299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420582948.8U Expired - Lifetime CN204153183U (en) | 2014-10-10 | 2014-10-10 | Electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204153183U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705510A (en) * | 2015-07-17 | 2017-05-24 | 浙江三花智能控制股份有限公司 | Electronic expansion valve and valve seat component thereof |
| CN106996662A (en) * | 2016-01-22 | 2017-08-01 | 浙江三花汽车零部件有限公司 | A kind of electric expansion valve |
| CN107246530A (en) * | 2017-07-14 | 2017-10-13 | 珠海格力电器股份有限公司 | Filtering and deslagging structure for valve, air conditioning system and pipeline system |
| CN107975629A (en) * | 2016-10-25 | 2018-05-01 | 盾安环境技术有限公司 | A kind of air conditioning system for vehicle electric expansion valve |
| CN109538772A (en) * | 2017-09-21 | 2019-03-29 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN112610365A (en) * | 2020-11-30 | 2021-04-06 | 隆鑫通用动力股份有限公司 | Carburetor of engine, engine and working machine |
-
2014
- 2014-10-10 CN CN201420582948.8U patent/CN204153183U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705510A (en) * | 2015-07-17 | 2017-05-24 | 浙江三花智能控制股份有限公司 | Electronic expansion valve and valve seat component thereof |
| CN106705510B (en) * | 2015-07-17 | 2019-11-15 | 浙江三花智能控制股份有限公司 | Electric expansion valve and its valve component |
| CN106996662A (en) * | 2016-01-22 | 2017-08-01 | 浙江三花汽车零部件有限公司 | A kind of electric expansion valve |
| CN106996662B (en) * | 2016-01-22 | 2020-09-15 | 浙江三花汽车零部件有限公司 | Electronic expansion valve |
| CN107975629A (en) * | 2016-10-25 | 2018-05-01 | 盾安环境技术有限公司 | A kind of air conditioning system for vehicle electric expansion valve |
| CN107246530A (en) * | 2017-07-14 | 2017-10-13 | 珠海格力电器股份有限公司 | Filtering and deslagging structure for valve, air conditioning system and pipeline system |
| CN109538772A (en) * | 2017-09-21 | 2019-03-29 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN112610365A (en) * | 2020-11-30 | 2021-04-06 | 隆鑫通用动力股份有限公司 | Carburetor of engine, engine and working machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204153183U (en) | Electric expansion valve | |
| CN101871539B (en) | Magnetic check valve | |
| US9810461B2 (en) | Electronic expansion valve | |
| US9341399B2 (en) | Electronic expansion valve | |
| CN107304843A (en) | Electric expansion valve | |
| CN102330834B (en) | Electromagnetic valve | |
| CN201265693Y (en) | Airflow impulse valve | |
| CN105276875A (en) | Electronic expansion valve | |
| CN205260931U (en) | Bionical low pressure drop axial -flow type check valve | |
| CN105276197A (en) | Electronic expansion valve | |
| CN104807259A (en) | Electronic expansion valve | |
| CN102052468A (en) | Flow path switch control device | |
| CN105987206A (en) | Stop valve | |
| CN107956911B (en) | A kind of solenoid valve | |
| CN107356024B (en) | Electronic expansion valve | |
| CN201753789U (en) | Magnetic check valve | |
| CN203404430U (en) | Axial-flow type vibration-free check valve | |
| CN103542647B (en) | A kind of Bidirectional throttling electronic expansion valve | |
| CN107355546B (en) | Electronic expansion valve | |
| CN104728509B (en) | Solenoid valve and refrigeration system with same | |
| CN105716335A (en) | Electronic expansion valve | |
| CN205824224U (en) | A kind of flow control valve | |
| CN105508623A (en) | Electronic expansion valve | |
| CN202420051U (en) | Bidirectional throttle valve | |
| CN203374885U (en) | Four-way valve and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150211 |