Title:
ELECTRONIC EXPANSION VALVE AND COOLING SYSTEM HAVING SAME
Document Type and Number:
WIPO Patent Application WO/2019/105454
Kind Code:
A1
Abstract:
Disclosed is an electronic expansion valve and a cooling system having same. The electronic expansion valve comprises: a valve seat (10), a valve needle (20) having open and closed positions, a drive mechanism (30) comprising a rotor (32) and a coil (31), a planetary gear speed-reduction mechanism (40) comprising a planetary carrier (41), a planetary gear (42) and a gearbox (43), and a transmission mechanism (50) comprising a nut (52) and a screw rod (51). The rotor (32), the planetary carrier (41) and the gearbox (43) are coaxially arranged, and the rotor (32) is fixedly connected to the planetary carrier (41) so as to drive the planetary carrier (41) to rotate along the axis thereof. The planetary gear (42) is sleeved on a first mounting shaft (411); the gearbox (43) comprises a box body (431), a fixed inner gear ring (432) and an output inner gear ring (433); the planetary gear (42) is simultaneously meshed with the fixed inner gear ring (432) and the output inner gear ring (433). The first end of the screw rod (51) is fixedly connected to the output inner gear ring (433), and the second end of the screw rod abuts the valve needle (20) so as to move the valve needle (20) between the open position and the closed position. The described electronic expansion valve not only may increase flow adjustment range but also achieves high precision and miniaturization.
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Inventors:
LV FENG (CN)
LIU TANGQING (CN)
SHU XIAOHUI (CN)
WEI XIAORANG (CN)
LIU TANGQING (CN)
SHU XIAOHUI (CN)
WEI XIAORANG (CN)
Application Number:
PCT/CN2018/118535
Publication Date:
June 06, 2019
Filing Date:
November 30, 2018
Export Citation:
Assignee:
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD (CN)
International Classes:
F16K31/53; F16K31/00; F16K31/44
Foreign References:
| CN105822822A | 2016-08-03 | |||
| CN204533762U | 2015-08-05 | |||
| CN203979607U | 2014-12-03 | |||
| CN1865740A | 2006-11-22 | |||
| CN103775717A | 2014-05-07 | |||
| CN203656223U | 2014-06-18 | |||
| JP2001141097A | 2001-05-25 | |||
| CN201711255162A | 2017-12-01 | |||
| CN201711487611A | 2017-12-30 |
Other References:
See also references of EP 3719365A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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