Title:
REFRIGERATION MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/070828
Kind Code:
A1
Abstract:
This refrigeration machine comprises: a low temperature cycle having an evaporator which performs heat exchange between air inside a refrigeration chamber and a first refrigerant, a first compressor which compresses the first refrigerant and supplies the compressed first refrigerant to the evaporator, and a low temperature-side expansion valve which lowers the pressure of the first refrigerant that has passed through the first compressor; a high temperature cycle having a heat dissipator which performs heat exchange between outside air and a second refrigerant, a second compressor which compresses a second refrigerant and supplies the compressed second refrigerant to the heat dissipator, and a high temperature-side expansion valve which lowers the pressure of the second refrigerant that has passed through the heat sink; an intermediate heat exchanger which performs heat exchange between the first refrigerant flowing from the first compressor and the second refrigerant flowing from the high-temperature side expansion valve; and a gas injection circuit which is provided to at least one of the low temperature cycle and the high temperature cycle, and which supplies the refrigerant before compression to at least one of the first compressor and the second compressor, wherein the first refrigerant is a mixed refrigerant containing carbon dioxide and R32 refrigerant, and the second refrigerant is carbon dioxide.
Inventors:
NAMBA YUKI (JP)
ITO TAKAHIDE (JP)
ENYA ATSUSHI (JP)
ISHIDA TOSHIYUKI (JP)
ITO TAKAHIDE (JP)
ENYA ATSUSHI (JP)
ISHIDA TOSHIYUKI (JP)
Application Number:
PCT/JP2021/033176
Publication Date:
April 07, 2022
Filing Date:
September 09, 2021
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B29/00; F25B1/00; F25B1/04; F25B7/00; F25B43/00
Domestic Patent References:
| WO2014080436A1 | 2014-05-30 | |||
| WO2017221382A1 | 2017-12-28 |
Foreign References:
| US20110120179A1 | 2011-05-26 | |||
| JP2017044420A | 2017-03-02 | |||
| JP2012007825A | 2012-01-12 | |||
| JP2020163122A | 2020-10-08 | |||
| JP4543469B2 | 2010-09-15 |
Other References:
See also references of EP 4198416A4
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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