Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/180718
Kind Code:
A1
Abstract:
The present invention provides a highly reliable refrigeration cycle device by avoiding the liquid return phenomenon during pre-cooling operation that is performed after the end of defrosting operation. This refrigeration cycle device comprises: a refrigerant circuit that is configured by a compressor 5, a condenser 6, a receiver 8, an expansion valve 10, an evaporator 11, and an accumulator 13 being sequentially connected; a defrosting means 24 for melting frost adhering to the evaporator 11; and a control means 30 for selecting either cooling operation, defrosting operation, or pre-cooling operation. In the pre-cooling operation, a predetermined amount of refrigerant is held in the receiver 8 so that the amount of refrigerant circulating through the refrigerant circuit is less than that in the cooling operation and the defrosting operation.
Inventors:
TSUKIYAMA RYO (JP)
Application Number:
PCT/JP2021/006991
Publication Date:
September 01, 2022
Filing Date:
February 25, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00
Foreign References:
| JPH0663692B2 | 1994-08-22 | |||
| JP2017166730A | 2017-09-21 | |||
| JP2014119145A | 2014-06-30 | |||
| JP2017166730A | 2017-09-21 |
Other References:
See also references of EP 4300004A4
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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