|Numéro de publication||2020/194655|
|Statut||Délivré - en vigueur|
|Date de dépôt||2019-03-28|
|Date de publication||2020-10-01|
|Propriétaire||HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC. (Japon)|
AbrégéThis air conditioner comprises: a refrigerant circuit in which a refrigerant circulates sequentially in a refrigeration cycle through a compressor, a condenser, an expansion valve, and an evaporator; and a control unit that controls at least the compressor and the expansion valve. One of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger. The control unit causes the indoor heat exchanger to function as the evaporator, and controls the operating frequency of the compressor on the basis of the temperature of the indoor heat exchanger during a freezing treatment of freezing the indoor heat exchanger (step S20), as well as controls the opening of the expansion valve on the basis of the dryness of the refrigerant sucked into the compressor or the temperature of the refrigerant discharged from the compressor (step S30).
Classes IPC ?
- F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
- F24F 11/86 - Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits