Patent ID: 9726420
Date: 2017-08-08
CPC Classifications: B60H,F24F,F25B,F25D,Y02B

Claim:
1. A refrigerating and air-conditioning apparatus comprising: multiple refrigeration cycles each including a compressor, a four-way valve, an indoor heat exchanger, a pressure reducing device, and an outdoor heat exchanger which are connected by a pipe, each refrigeration cycle being configured to be capable of performing a cooling operation and a heating operation; an outdoor fan configured to send air for heat exchange with the outdoor heat exchangers of the refrigeration cycles; multiple indoor fans arranged corresponding to the respective indoor heat exchangers of the refrigeration cycles, each indoor fan being configured to create air flow to be sent through the respective indoor heat exchanger to an air-conditioning target space; and a controller configured to determine whether at least one of the refrigeration cycles is performing a defrosting operation, determine an indoor-fan air-temperature of the indoor fans, variably control, in response to the indoor-fan air-temperature, a capacity of the compressor of the at least one refrigeration cycle performing the defrosting operation which defrosts the outdoor heat exchanger corresponding to the at least one refrigeration cycle performing the defrost operation such that the indoor-fan air-temperature of air mixed by air-sending through the indoor fans reaches and substantially maintains a first predetermined temperature.