Title:
BINARY REFRIGERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/067807
Kind Code:
A1
Abstract:
A binary refrigeration device (10) comprises: a first refrigeration cycle (1) in which a first refrigerant circulates, the first refrigeration cycle including a first compressor (11), a condensation device (12), a first expansion valve (13), and a cascade heat exchanger (3); and a second refrigeration cycle (2) in which a second refrigerant circulates, the second refrigeration cycle including a second compressor (21), the cascade heat exchanger (3); a second expansion valve (23), and an evaporator (24). The cascade heat exchanger (3) performs heat exchange between the first refrigerant and the second refrigerant, and thereby is used as an evaporator unit (31) in the first refrigeration cycle (1) and is used as a condensor unit (32) in the second refrigeration cycle. The condensation device (12) includes a first heat exchanger unit (121) that condenses the first refrigerant, and a second heat exchanger unit (122) that condenses or evaporates the first refrigerant. The binary refrigeration device (10) further comprises a switching device (80) that switches the state of the second heat exchanger unit (122) between a first state in which the first refrigerant is condensed and a second state in which the first refrigerant is evaporated. In a first operation for performing cooling by the evaporator (24) of the second refrigeration cycle (2), the switching device (80) puts the second heat exchanger unit (122) in the first state. In a second operation for suppressing the pressure of the second refrigeration cycle (2), the switching device (80) puts the second heat exchange unit (122) in the second state.
Inventors:
NISHIYAMA TAKUMI (JP)
ISHIKAWA TOMOTAKA (JP)
ISHIHARA NOBUYA (JP)
YASHIRO TAKANORI (JP)
IUCHI HIROYA (JP)
ONO HIDEKI (JP)
ISHIKAWA TOMOTAKA (JP)
ISHIHARA NOBUYA (JP)
YASHIRO TAKANORI (JP)
IUCHI HIROYA (JP)
ONO HIDEKI (JP)
Application Number:
PCT/JP2021/039135
Publication Date:
April 27, 2023
Filing Date:
October 22, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B7/00
Domestic Patent References:
| WO2013161725A1 | 2013-10-31 | |||
| WO2018198203A1 | 2018-11-01 |
Foreign References:
| JP2018087693A | 2018-06-07 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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