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Patent Searching and Data


Title:
VALVE OPENING CIRCUIT AND HEAT PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/210215
Kind Code:
A1
Abstract:
A valve opening circuit 5 is mounted on a heat pump device having a valve on a refrigerant circuit. The valve opening circuit 5 comprises: a DC electrical path 56 to which a DC voltage generated from a normal AC voltage is applied; a valve driving circuit 53 for opening and closing the valve using the DC voltage of the DC electrical path 56; a control unit 54 for obtaining a control power supply voltage on the basis of the DC voltage of the DC electrical path 56, and controlling the valve driving circuit 53; and a feeding port 7 connected to the DC electrical path 56 and connectable to a DC power supply line 9 provided externally for emergency. If the AC voltage is lost and the DC voltage is being supplied to the feeding port 7 from the DC power supply line 9, the control unit 54 causes the valve to be opened by the valve driving circuit 53.

Inventors:
IYOSHI YUUTA (JP)
YAMANOI YOSHIKI (JP)
SAEKI KUMIKO (JP)
Application Number:
PCT/JP2020/045626
Publication Date:
October 21, 2021
Filing Date:
December 08, 2020
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B45/00; F25B1/00; F25B49/02
Domestic Patent References:
WO2017037788A12017-03-09
WO2018235230A12018-12-27
Foreign References:
JP2014119153A2014-06-30
JP2018179316A2018-11-15
JP2008020133A2008-01-31
JP2007046793A2007-02-22
JP2000074514A2000-03-14
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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