EP 4372295 A1 20240522 - AIR CONDITIONER
Title (en)
AIR CONDITIONER
Title (de)
KLIMAANLAGE
Title (fr)
CLIMATISEUR
Publication
Application
Priority
JP 2021026615 W 20210715
Abstract (en)
An air-conditioning apparatus includes a compressor, a condenser, a pressure-reducing device, an evaporator, a temperature sensor, and a controller. The controller controls the compressor and the pressure-reducing device to cause a heating operation or a cooling operation to be performed. The controller causes an intermittent operation to be performed, the intermittent operation being an operation in which an operation of the compressor is stopped when a cooling load or a heating load decreases and the operation of the compressor is started when the cooling load or the heating load increases. The controller causes, when the operation of the compressor is performed in the intermittent operation, the intermittent operation to be performed at a lowest frequency set as a lower-limit frequency in a frequency range that is set for the operation of the compressor. The controller has: a first determination value obtained by multiplying by a preset first constant set, a time constant which is a response value required until heating and cooling capacity in refrigerant circulation in a refrigeration cycle circuit is stabilized, and which is a value at a rise of a waveform representing the heating and cooling capacity calculated from a value measured by the temperature sensor; and a second determination value obtained by multiplying the time constant by a preset second constant smaller than the first constant. The controller increases the lowest frequency for a subsequent operation of the compressor, when in the intermittent operation, an intermittent operation time from the start to stop of the compressor is longer than the first determination value, and deceases the lowest frequency for the above subsequent operation, when in the intermittent operation, the intermittent operation time is shorter than the second determination value.
IPC 8 full level
F25B 1/00 (2006.01); F24F 11/47 (2018.01)
CPC (source: EP US)
F24F 11/62 (2018.01 - EP); F24F 11/86 (2018.01 - EP); F25B 13/00 (2013.01 - EP US); F25B 49/02 (2013.01 - EP); F25B 49/022 (2013.01 - US); F24F 2140/20 (2018.01 - EP); F25B 2313/0314 (2013.01 - EP); F25B 2313/0315 (2013.01 - EP); F25B 2600/025 (2013.01 - EP); F25B 2600/0253 (2013.01 - US); F25B 2700/2104 (2013.01 - EP); F25B 2700/2106 (2013.01 - US); F25B 2700/2117 (2013.01 - US); F25B 2700/21172 (2013.01 - 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 4372295 A1 20240522; EP 4372295 A4 20240821; JP 7433539 B2 20240219; JP WO2023286242 A1 20230119; US 2024230196 A1 20240711; WO 2023286242 A1 20230119
DOCDB simple family (application)
EP 21950181 A 20210715; JP 2021026615 W 20210715; JP 2023534544 A 20210715; US 202118562969 A 20210715