EP 4166873 A1 20230419 - REFRIGERATION CYCLE DEVICE
Title (en)
REFRIGERATION CYCLE DEVICE
Title (de)
KÄLTEKREISLAUFVORRICHTUNG
Title (fr)
DISPOSITIF À CYCLE DE RÉFRIGÉRATION
Publication
Application
Priority
JP 2020022854 W 20200610
Abstract (en)
A refrigeration cycle apparatus includes an outdoor unit including a compressor and an outdoor heat exchanger, a plurality of indoor units each including an indoor heat exchanger and an expansion device, a relay unit intervening between the outdoor unit and each of the plurality of indoor units and serving to cause refrigerant from the outdoor unit to branch off into each of the indoor units, a refrigerant circuit in which the compressor, the outdoor heat exchanger, the expansion device and the indoor heat exchanger are connected by refrigerant pipes and through which refrigerant circulates, and a controller configured to control the plurality of indoor units. The relay unit includes a plurality of high-pressure valves each provided in a corresponding one of a plurality of high-pressure pipes connecting a high-pressure side of the outdoor unit and each of the indoor units and a plurality of low-pressure valves each provided in a corresponding one of a plurality of low-pressure pipes connecting a low-pressure side of the outdoor unit and each of the indoor units. The controller is configured to, when an operation state of at least one of the indoor units is changed from a first state to a second state, judge, based on a degree of supercooling of an outlet of the outdoor heat exchanger or the indoor heat exchanger that functions as a condenser or based on a degree of superheating of a suction side of the compressor, whether an abnormality is present in the plurality of high-pressure valves or the plurality of low-pressure valves.
IPC 8 full level
F25B 49/02 (2006.01)
CPC (source: EP US)
F24F 11/38 (2018.01 - US); F25B 41/20 (2021.01 - EP US); F25B 49/005 (2013.01 - EP); F24F 2140/20 (2018.01 - US); F25B 13/00 (2013.01 - EP); F25B 2313/0233 (2013.01 - EP); F25B 2313/0272 (2013.01 - EP); F25B 2313/0314 (2013.01 - EP); F25B 2313/0315 (2013.01 - EP); F25B 2500/19 (2013.01 - EP); F25B 2600/2507 (2013.01 - US); F25B 2700/1931 (2013.01 - EP); F25B 2700/21163 (2013.01 - EP); F25B 2700/21174 (2013.01 - EP)
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 4166873 A1 20230419; EP 4166873 A4 20230719; EP 4166873 B1 20240424; JP 7479469 B2 20240508; JP WO2021250815 A1 20211216; US 2023124335 A1 20230420; WO 2021250815 A1 20211216
DOCDB simple family (application)
EP 20940299 A 20200610; JP 2020022854 W 20200610; JP 2022530429 A 20200610; US 202017917662 A 20200610