Abstract: Between two heat exchangers of a first heat exchanger unit 41 and a second heat exchanger unit 42 included in an indoor heat exchanger 40, an opening 80 is arranged for introducing indoor air sucked from an air inlet 321 into an indoor blower 50 without being heat-exchanged. At the opening 80, a damper 91 is arranged for adjusting the opening rate of the opening 80, which is driven by a predetermined driving member 92. During a cooling cycle running of a freezing cycle, the opening rate of the opening 80 and/or the devices included in the freezing cycle such as a compressor, blower and expansion valve are controlled alone or in combination so that the temperature of the indoor heat exchanger 40 is lower than a dew point temperature of the indoor air.

Abstract: Between two heat exchangers of a first heat exchanger unit 41 and a second heat exchanger unit 42 included in an indoor heat exchanger 40, an opening 80 is arranged for introducing indoor air sucked from an air inlet 321 into an indoor blower 50 without being heat-exchanged. At the opening 80, a damper 91 is arranged for adjusting the opening rate of the opening 80, which is driven by a predetermined driving member 92. During a cooling cycle running of a freezing cycle, the opening rate of the opening 80 and/or the devices included in the freezing cycle such as a compressor, blower and expansion valve are controlled alone or in combination so that the temperature of the indoor heat exchanger 40 is lower than a dew point temperature of the indoor air.

Abstract: In a control apparatus of an air-conditioner in which a temperature difference between the room temperature and the set temperature is set into an input 1, a time-dependent change in the room temperature is set to an input 2, fuzzy arithmetic operations are executed in accordance with control rules by using membership functions of a membership function section 1, a switching amount of an operating frequency of a compressor 2 of an output is controlled on the basis of the results of the fuzzy arithmetic operations, and the operating frequency is switched at every predetermined interval (t seconds) thereby executing a room temperature control, during the operation, a room temperature (Tr) is always detected by a room temperature detecting section 4 and a change amount (Tr2-Tr1) of the room temperature is calculated in a room temperature change amount calculating section 5 each time of the detection, and when the calculated change amount exceeds a predetermined value, it is determined that the room temperature s