To prevent frost formation on an indoor unit without degrading cooling comfort in starting an operation.
An outdoor control portion 13 sets a frequency of a compressor 1 to be higher for a specific time after starting a cooling operation, then sets a maximum frequency of the compressor high when a humidity is low, and sets the maximum frequency of the compressor low when the humidity is high. Here, an indoor control portion 12 transmits the temperature difference between an indoor temperature from an indoor temperature sensor 8 and a set temperature from a remote controller 18 to the outdoor control portion 13, and the outdoor control portion 13 decides a compressor operation rotational frequency on the basis of the temperature difference, and controls the rotational frequency of the compressor 1 through an invertor circuit 17. Further the indoor control portion 12 determines a humidity zone from a high humidity zone, an intermediate humidity zone and a low humidity zone on the basis of the indoor humidity from the indoor humidity sensor 9 and the lapse time, and transmits the same to the outdoor control portion 13, and the outdoor control portion 13 decides the compressor maximum rotational frequency on the basis of the humidity zone, and controls the rotational frequency of the compressor 1 through the invertor circuit 17.
COPYRIGHT: (C)2008,JPO&INPIT
Masakazu Kondo
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