Title:
VALVE SEAT AND ELECTRONIC EXPANSION VALVE HAVING SAID SEAT
Document Type and Number:
WIPO Patent Application WO/2023/143025
Kind Code:
A1
Abstract:
A valve seat (10) and an electronic expansion valve having said seat. The valve seat (10) is provided with a first end and an opposing second end; a first accommodating cavity (30) is arranged in the valve seat (10); a fluid opening (40) is provided at a side face of the valve seat (10); a flow slowing recess (20) is provided on an inner side wall of the first accommodating cavity (30), and the flow slowing recess (20) is arranged corresponding to the fluid opening (40); the second end of the valve seat (10) is provided with a valve port (50); the valve port (50) is in communication with the first accommodating cavity (30); the valve port (50) comprises a first section (51), a second section (52), and a third section (53) that are arranged in sequence; the first section (51) is arranged close to the first accommodating cavity (30); the diameter of the second section (52) is greater than the diameter of the first section (51); the diameter of the end of the third section (53) close to the second section (52) is greater than the diameter of the second section (52); and the diameter of the third section (53) gradually increases in the direction starting from the first end of the valve seat (10) towards the second end of the valve seat (10). By the present technical solution, the problem of a large amount of noise from an electronic expansion valve in the prior art is solved.
Inventors:
CHEN YONGHAO (CN)
HE YUCHEN (CN)
ZHAO JUN (CN)
HE YUCHEN (CN)
ZHAO JUN (CN)
Application Number:
PCT/CN2023/071384
Publication Date:
August 03, 2023
Filing Date:
January 09, 2023
Export Citation:
Assignee:
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD (CN)
International Classes:
F16K47/02
Foreign References:
| CN217177640U | 2022-08-12 | |||
| CN113566460A | 2021-10-29 | |||
| CN111051797A | 2020-04-21 | |||
| CN211082433U | 2020-07-24 | |||
| JP2004340260A | 2004-12-02 | |||
| EP3171058A1 | 2017-05-24 | |||
| JP2019163888A | 2019-09-26 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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