Title:
ELECTRONIC EXPANSION VALVE
Document Type and Number:
WIPO Patent Application WO/2020/259657
Kind Code:
A1
Abstract:
An electronic expansion valve, comprising a valve needle lead screw assembly (1), the valve needle lead screw assembly (1) comprising a gasket portion (13), a spring (14) and a lead screw assembly (15); the lead screw assembly (15) comprises a lead screw (151), the spring (14) is sleeved outside the lead screw (151); the lead screw assembly (15) comprises a lower stop portion (153) and an upper stop portion (155), the lower stop portion (153) comprises a lower flange portion (1531) or a main body portion (1562), and the lower stop portion (153) or the main body portion (1562) can abut against the gasket portion (13). The upper stop portion (155) comprises an upper flange portion (1551) and/or an upper stop ring (1552), and the upper flange portion (1551) and/or the upper stop ring (1552) abut against the spring (14); a lower end of the spring (14) abuts against the gasket portion (13). In the electronic expansion valve, the spring (14) is sleeved outside the lead screw (151), an upper end of the spring (14) abuts against the upper stop portion (155), a lower end of the spring (14) abuts against the lower stop portion (153), the spring (14) fits the lead screw assembly (15), and thus the spring (14) of the valve needle lead screw assembly (1) is not easy to deflect.
Inventors:
WEI XIANRANG (CN)
Application Number:
PCT/CN2020/098381
Publication Date:
December 30, 2020
Filing Date:
June 28, 2020
Export Citation:
Assignee:
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD (CN)
International Classes:
F16K1/02; F16K1/00; F16K1/38; F16K31/50; F25B41/06
Foreign References:
| CN105626876A | 2016-06-01 | |||
| CN107356025A | 2017-11-17 | |||
| CN107304843A | 2017-10-31 | |||
| CN205745625U | 2016-11-30 | |||
| CN209026210U | 2019-06-25 | |||
| CN109425150A | 2019-03-05 | |||
| EP3135969A1 | 2017-03-01 | |||
| JP2016205463A | 2016-12-08 | |||
| CN201910575526A | 2019-06-28 |
Other References:
See also references of EP 3992500A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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