Title (en)

REFRIGERATION CYCLE DEVICE

Title (de)

KÄLTEKREISLAUFVORRICHTUNG

Title (fr)

DISPOSITIF À CYCLE FRIGORIFIQUE

Publication

EP 4343229 A4 20240717 (EN)

Application

EP 21940715 A 20210518

Priority

JP 2021018771 W 20210518

Abstract (en)

[origin: EP4343229A1] A refrigeration cycle apparatus includes a high-stage circuit in which a high-stage compressor, a high-stage condenser, a high-stage expansion valve, and, a high-stage flow passage of a cascade heat exchanger are connected annularly by pipes and in which high-stage refrigerant circulates, a low-stage circuit in which a low-stage compressor, an intermediate cooler, a low-stage flow passage of the cascade heat exchanger, a low-stage expansion valve, and, a low-stage evaporator are connected annularly by pipes and in which low-stage refrigerant circulates, and a controller configured to control operation of the high-stage circuit and the low-stage circuit. The controller is configured to, when determining that the refrigerant in a liquid state flows into the high-stage compressor, allow high temperature low-stage refrigerant, being the low-stage refrigerant having a high temperature and discharged from the low-stage compressor, to flow into the low-stage flow passage of the cascade heat exchanger.

IPC 8 full level

F25B 7/00 (2006.01); F25B 1/00 (2006.01)

CPC (source: EP)

F25B 7/00 (2013.01); F25B 49/005 (2013.01); F25B 49/02 (2013.01); F25B 40/02 (2013.01); F25B 2400/0403 (2013.01); F25B 2400/054 (2013.01); F25B 2500/06 (2013.01); F25B 2500/28 (2013.01); F25B 2600/2501 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/1933 (2013.01); F25B 2700/21151 (2013.01); F25B 2700/21152 (2013.01); F25B 2700/21163 (2013.01)

Citation (search report)

• [X] GB 2518559 A 20150325 - MITSUBISHI ELECTRIC CORP [JP]
• [A] GB 2566381 A 20190313 - MITSUBISHI ELECTRIC CORP [JP]
• See also references of WO 2022244098A1

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 4343229 A1 20240327; EP 4343229 A4 20240717; CN 117321354 A 20231229; JP 7399354 B2 20231215; JP WO2022244098 A1 20221124; WO 2022244098 A1 20221124

DOCDB simple family (application)

EP 21940715 A 20210518; CN 202180098122 A 20210518; JP 2021018771 W 20210518; JP 2023522041 A 20210518