Title:
ELECTRIC VALVE
Document Type and Number:
WIPO Patent Application WO/2019/001249
Kind Code:
A1
Abstract:
An electric valve comprises a valve body (1), a spool assembly (2), and a coil assembly (3). The spool assembly comprises a piston (5), a valve seat (4), a valve needle (21), and a rotor (22). The valve seat is provided with a first valve port (43). The valve body is provided with a first interface (11), a second interface (12), a second valve port (13), and a bypass channel (15). One end of the first valve port keeps communication with the first interface, and the other end of the first valve port is in communication with the second interface by means of the bypass channel. A third valve port (14) is disposed between the second valve port and the second interface. A check valve is directly disposed between the third valve port and the second interface. When the second interface is an inlet and the flow area of a throttling channel formed between the valve needle and the first valve port is smaller than the cross-sectional area of the first valve port, the second valve port and the third valve port are closed, the second interface is in communication with to the first interface by means of the bypass channel and the first valve port and the flow area of the throttling channel changes as the distance between the valve needle and the first valve port changes.
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Inventors:
LIU XIBO (CN)
YANG SHIZHAO (CN)
ZHOU WENRONG (CN)
YANG SHIZHAO (CN)
ZHOU WENRONG (CN)
Application Number:
PCT/CN2018/090582
Publication Date:
January 03, 2019
Filing Date:
June 11, 2018
Export Citation:
Assignee:
ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD (CN)
International Classes:
F16K1/44
Domestic Patent References:
| WO2016136239A1 | 2016-09-01 |
Foreign References:
| CN105889597A | 2016-08-24 | |||
| CN101769389A | 2010-07-07 | |||
| CN104405950A | 2015-03-11 | |||
| CN101135385A | 2008-03-05 | |||
| JP2007225091A | 2007-09-06 | |||
| CN201710519696A | 2017-06-30 | |||
| CN201710518984A | 2017-06-30 |
Other References:
See also references of EP 3647635A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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