Title:
VALVE NEEDLE AND ELECTRONIC EXPANSION VALVE HAVING SAME
Document Type and Number:
WIPO Patent Application WO/2023/030409
Kind Code:
A1
Abstract:
A valve needle and an electronic expansion valve having same. The valve needle (10) is provided with a connecting end (11) and a blocking end (12) that are arranged opposite to each other; the blocking end comprises a blocking segment (121), a first opening segment (122), and a second opening segment (123) that are sequentially connected in the axial direction; the blocking segment cooperates with a valve port (21) to block the valve port; the cross sectional area of the blocking segment close to the connecting end is greater than the cross sectional area of the blocking segment distant from the connecting end; the cross sectional area of the second opening segment close to the connecting end is greater than the cross sectional area of the second opening segment distant from the connecting end; the cross sectional area of the blocking segment distant from the connecting end is greater than the cross sectional area of the second opening segment close to the connecting end; and the cross sectional area of the first opening segment remains unchanged. The electronic expansion valve can solve the problem in the prior art that the flow rate of a refrigerant cannot be accurately controlled while the electronic expansion valve remains a small opening degree.
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Inventors:
HE YUCHEN (CN)
CHEN YONGHAO (CN)
XU GUANJUN (CN)
CHEN YONGHAO (CN)
XU GUANJUN (CN)
Application Number:
PCT/CN2022/116321
Publication Date:
March 09, 2023
Filing Date:
August 31, 2022
Export Citation:
Assignee:
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD (CN)
International Classes:
F16K31/02; F16K1/38; F16K27/02
Domestic Patent References:
| WO2021057299A1 | 2021-04-01 |
Foreign References:
| CN216158328U | 2022-04-01 | |||
| CN103968620A | 2014-08-06 | |||
| CN108361393A | 2018-08-03 | |||
| CN103574062A | 2014-02-12 | |||
| CN109990103A | 2019-07-09 | |||
| US20170002931A1 | 2017-01-05 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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