EP 4400779 A1 20240717 - AIR CONDITIONER
Title (en)
AIR CONDITIONER
Title (de)
KLIMAANLAGE
Title (fr)
CLIMATISEUR
Publication
Application
Priority
JP 2021032974 W 20210908
Abstract (en)
An air conditioner (100) includes a compressor (1), a first heat exchanger (2), a second heat exchanger (4), a decompression device (3), a circulation path (5), a temperature sensor (50), a concentration sensor (51), a heater (60), and a control device (70). In a case where a concentration of refrigeration oil detected by the concentration sensor (51) is less than a first threshold value, the control device (70) operates the heater (60) such that a part of a refrigerant in a liquid state in the compressor (1) is vaporized, and in a case where the concentration of the refrigeration oil detected by the concentration sensor (51) exceeds a second threshold value greater than the first threshold value and a temperature of the refrigeration oil detected by the temperature sensor (50) is less than a specified temperature, the control device (70) operates the heater (60) such that the refrigerant in the liquid state in the compressor (1) is vaporized and the temperature of the refrigeration oil in the compressor (1) is increased.
IPC 8 full level
F25B 1/00 (2006.01)
CPC (source: EP US)
F25B 31/002 (2013.01 - US); F25B 31/004 (2013.01 - EP); F25B 49/02 (2013.01 - EP); F25B 49/022 (2013.01 - US); F25B 2400/01 (2013.01 - EP US); F25B 2500/16 (2013.01 - EP US); F25B 2700/21155 (2013.01 - EP US)
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 4400779 A1 20240717; JP WO2023037435 A1 20230316; US 2024337422 A1 20241010; WO 2023037435 A1 20230316
DOCDB simple family (application)
EP 21956732 A 20210908; JP 2021032974 W 20210908; JP 2023546616 A 20210908; US 202118293530 A 20210908