Title:
MULTI-STAGE COMPRESSION REFRIGERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/249566
Kind Code:
A1
Abstract:
Provided is a refrigeration device that is able to improve the efficiency of a refrigeration cycle by increasing the number of compression stages, while operating stably over a wide range of operating conditions. This refrigeration device is provided with: a compression unit containing a plurality of stages of compression mechanisms, the number of stages N being at least 3; a first heat exchange for releasing, to the outside air, heat from a refrigerant discharged from the compression unit; a decompression unit containing a plurality of decompression mechanisms provided to each of the plurality of stages; a second heat exchanger for causing the refrigerant that has passed through the decompression unit to absorb heat from a thermal load; a plurality of gas-liquid separators provided between the decompression mechanisms; a plurality of intermediate pressure injection flow passages corresponding respectively to the plurality of gas-liquid separators and supplying gas-phase refrigerant from the corresponding gas-liquid separator to between the compression mechanisms; and a valve provided to at least one of the plurality of intermediate pressure injection flow passages. When the valve is operated the number of effective stages circulating the refrigerant changes.
Inventors:
ISHIDA TOSHIYUKI (JP)
ENYA ATSUSHI (JP)
YAMADA MIKI (JP)
KURODA NAOKI (JP)
OKADA YUJI (JP)
SASAYA YUGO (JP)
MATSUMOTO KOHEI (JP)
ARIMOTO RYOHEI (JP)
SATO SHINGO (JP)
ENYA ATSUSHI (JP)
YAMADA MIKI (JP)
KURODA NAOKI (JP)
OKADA YUJI (JP)
SASAYA YUGO (JP)
MATSUMOTO KOHEI (JP)
ARIMOTO RYOHEI (JP)
SATO SHINGO (JP)
Application Number:
PCT/JP2022/004824
Publication Date:
December 01, 2022
Filing Date:
February 08, 2022
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B43/00; F25B1/00; F25B1/10
Foreign References:
| JP2020204454A | 2020-12-24 | |||
| JP2015161499A | 2015-09-07 | |||
| US20110113804A1 | 2011-05-19 | |||
| JP2002188865A | 2002-07-05 | |||
| JP2006183950A | 2006-07-13 | |||
| JP2006242557A | 2006-09-14 | |||
| JP2006153455A | 2006-06-15 | |||
| JP2017044420A | 2017-03-02 | |||
| JP2018009565A | 2018-01-18 | |||
| JP2017044420A | 2017-03-02 |
Attorney, Agent or Firm:
OBA, Mitsuru et al. (JP)
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