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1. 发明公开

EP3719365A1 ELECTRONIC EXPANSION VALVE AND COOLING SYSTEM HAVING SAME 有权
公开(公告)号：EP3719365A1
公开(公告)日：2020-10-07
申请号：EP18882847.9
申请日：2018-11-30
申请人： Zhejiang Sanhua Intelligent Controls Co., Ltd.
发明人： LV, Feng , LIU, Tangqing , SHU, Xiaohui , WEI, Xianrang
IPC分类号： F16K31/53 , F16K31/44 , F16K31/00
摘要： 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.

2. 发明公开

EP3550193A1 ELECTRONIC EXPANSION VALVE AND REFRIGERATION SYSTEM HAVING SAME 有权
公开(公告)号：EP3550193A1
公开(公告)日：2019-10-09
申请号：EP17875890.0
申请日：2017-11-30
申请人： Zhejiang Sanhua Intelligent Controls Co., Ltd.
发明人： WANG, Yudong , SHU, Xiaohui
IPC分类号： F16K47/02 , F16K1/00 , F25B41/06
摘要： Disclosed are an electronic expansion valve and a refrigeration system having same. The electronic expansion valve comprises: a valve body (10) having a first valve port (10); a valve needle (20) having a close position and an open position, a second valve port (221) being provided at the bottom of the valve needle (20), the valve needle (20) having an accommodating space (23), a first overcurrent channel (211) and a second overcurrent channel (222), the first overcurrent channel (211) being communicated with the outside world, and the second overcurrent channel (222) being communicated with the second valve port (221); a valve rod (30) at least partially passing through the accommodation space (23); a first noise reducing part (40) provided in the accommodating space (23); a first sealing part (50) provided in the accommodating space (23) and located between the first sound adsorbing part (40) and the second overcurrent channel (222), a third overcurrent channel (51) being provided on the first sealing part (50), and the accommodating space (23) being communicated with the second overcurrent channel (222) by means of the third overcurrent channel (51); and a driving part for driving the valve rod (30) to move up and down. The electronic expansion valve can effectively solve the problem in the prior art of loud noise of the electronic expansion valve.

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