Patent ID: 7703296

Claim:
An air conditioner comprising: a main compressor in which a first refrigerant is compressed; a main condenser in which the first refrigerant compressed in the main compressor is condensed; a main expansion valve in which the first refrigerant condensed in the main condenser is expanded; a main evaporator in which the first refrigerant discharged from the main expansion valve evaporates by performing heat exchange with ambient air, thereby cooling the ambient air; and a fast cooler having a cooling cycle for re-cooling the ambient air cooled once in the main evaporator, using a second refrigerant condensed by heat exchange with the first refrigerant of the main evaporator, wherein the fast cooler includes: a fast cooling condenser in which the second refrigerant is condensed; a fast cooling re-condenser in which the second refrigerant condensed in the fast cooling condenser is re-condensed by performing heat exchange with the ambient air; a fast cooling expansion valve in which the re-condensed second refrigerant is expanded; a fast cooling evaporator in which the second refrigerant discharged from the fast cooling expansion valve evaporates; and a fast cooling compressor for compressing the second refrigerant vaporized in the fast cooling evaporator, wherein the main evaporator and the fast cooling condenser comprise an intermediate heat exchanger in which the second refrigerant of the fast cooling condenser is condensed by performing heat exchange with the first refrigerant of the main evaporator, wherein the fast cooling evaporator is located in front of the intermediate heat exchanger such that the ambient air is re-cooled by heat exchange with the second refrigerant of the fast cooling evaporator, and wherein the second refrigerant comprises a material having a lower evaporation calorie than the first refrigerant so that the second refrigerant can be condensed by heat exchange with the first refrigerant.