Abstract: A compressor of a refrigeration cycle is normally driven by a commercial power source. During a power failure, the compressor is driven by an auxiliary solar power source, wherein the compressor is initially driven at a minimum frequency for a delay period and is thereafter driven at a higher frequency.

Abstract: An air conditioning system and a control method thereof enables an infrared-ray detecting portion to detect the number of people and their moving area and controls the direction of a louver and an amount of air forced by a room blower fan, the swing of the louver being adjusted according to the movement state and the number of people so as to make the users feel a comfortable air conditioning environment at every area of room.

Abstract: A current control method and apparatus for use in an air conditioning apparatus is disclosed. A total current detection portion is mounted at the AC power supply portion and a peak current detection device is mounted between the conversion portion and the inverter. The total current detection portion detects a maximum current applied to the air conditioning apparatus and the peak current detection portion detects a peak current generated in the inverter. The limitation of the detected total current value is particularly preset in the heating and in the cooling operations. When the detected value surpasses the preset limitation, the inverter motor is stopped.