EP 4350256 A1 20240410 - MULTI-STAGE COMPRESSION REFRIGERATION DEVICE
Title (en)
MULTI-STAGE COMPRESSION REFRIGERATION DEVICE
Title (de)
MEHRSTUFIGE KOMPRESSIONSKÄLTEVORRICHTUNG
Title (fr)
DISPOSITIF DE RÉFRIGÉRATION À COMPRESSION À ÉTAGES MULTIPLES
Publication
Application
Priority
- JP 2021089018 A 20210527
- JP 2022004824 W 20220208
Abstract (en)
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.
IPC 8 full level
F25B 43/00 (2006.01); F25B 1/00 (2006.01); F25B 1/10 (2006.01)
CPC (source: EP)
F25B 1/10 (2013.01); F25B 41/39 (2021.01); F25B 49/02 (2013.01); F25B 2400/072 (2013.01); F25B 2400/23 (2013.01); F25B 2500/31 (2013.01); F25B 2600/2509 (2013.01); F25B 2700/2106 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4350256 A1 20240410; JP 2022181837 A 20221208; WO 2022249566 A1 20221201
DOCDB simple family (application)
EP 22810850 A 20220208; JP 2021089018 A 20210527; JP 2022004824 W 20220208