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Patent Searching and Data


Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/193498
Kind Code:
A1
Abstract:
This refrigeration cycle device is provided with: a first refrigerant circuit through which a first refrigerant flows and which includes a first compressor, an oil separator, a first heat exchanger functioning as a condenser, a first refrigerant flow path of a second heat exchanger, a first throttle device, and a third heat exchanger functioning as an evaporator; a second refrigerant circuit through which a second refrigerant flows and which includes a second compressor, a fourth heat exchanger functioning as a condenser, a second throttle device, and a second refrigerant flow path of the second heat exchanger; an oil return circuit which includes a first opening/closing device, connects the oil separator to the first compressor, and returns refrigerator oil accumulated in the oil separator to the first compressor; and a control device which controls the first compressor, the second compressor, the first throttle device, the second throttle device, and the first opening/closing device. When the first compressor and the second compressor are stopped and the pressure at a low-pressure section of the first refrigerant circuit meets or exceeds a reference value, the control device initiates the operation of the second compressor and implements a first control which opens the first opening/closing device.

Inventors:
HATANAKA KENSAKU (JP)
Application Number:
PCT/JP2017/015474
Publication Date:
October 25, 2018
Filing Date:
April 17, 2017
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B7/00; F25B1/00
Domestic Patent References:
WO2016121184A12016-08-04
WO2014045394A12014-03-27
Foreign References:
JP2014031982A2014-02-20
JP2009243767A2009-10-22
JPH0682107A1994-03-22
JPH04203760A1992-07-24
JP5575191B22014-08-20
Other References:
See also references of EP 3614071A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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