Title:
ELECTRONIC EXPANSION VALVE
Document Type and Number:
WIPO Patent Application WO/2020/233338
Kind Code:
A1
Abstract:
An electronic expansion valve, comprising: a valve body (10), the valve body having a valve port (11); a valve head part being movably arranged in the valve body, the valve head part comprising a valve head (21) and a pressing sleeve (22), the valve head having an accommodating cavity, the end of the accommodating cavity closest to the valve port having a bottom wall, a through hole (211) being disposed on the bottom wall, and the valve head being used for plugging the valve port; a guide sleeve (60) being arranged in the valve body, the valve head part being inserted in the guide sleeve; a drive part being movably arranged in the valve body, the end part of the drive part penetrating the pressing sleeve, and a channel being provided on the end part of the drive part and on the pressing sleeve, the channel, the accommodating cavity, and the through hole collectively forming a balancing channel penetrating the valve head part; an elastic member (40) being arranged in the accommodating cavity, one end of the elastic member fitting to the bottom wall, and the other end of the elastic member being capable of being compressed by the end part of the drive part; and a sealing member (80), the sealing member being arranged between the valve head part and the guide sleeve. The present electronic expansion valve can solve the problems of the high manufacturing costs and large size of electronic expansion valves in the prior art.
Inventors:
ZHAN SHAOJUN (CN)
FENG GUIGANG (CN)
HE QIUBO (CN)
FENG GUIGANG (CN)
HE QIUBO (CN)
Application Number:
PCT/CN2020/086493
Publication Date:
November 26, 2020
Filing Date:
April 23, 2020
Export Citation:
Assignee:
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD (CN)
International Classes:
F16K1/04
Foreign References:
| CN210123017U | 2020-03-03 | |||
| CN207470790U | 2018-06-08 | |||
| CN109708343A | 2019-05-03 | |||
| CN109323006A | 2019-02-12 | |||
| JPS5881277A | 1983-05-16 | |||
| EP3273186A1 | 2018-01-24 |
Other References:
See also references of EP 3974689A4
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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