AIR-CONDITIONING SYSTEM FOR VEHICLE

A vehicle air-conditioning system includes a cold-air circulation section in which indoor air of a vehicle is cooled via heat exchange with a refrigerant and is again supplied to a passenger compartment, a hot-air circulation section in which the indoor air is raised in temperature via heat exchange and is then again supplied to the passenger compartment, a purification circulation section in which the indoor air is introduced and purified and is then again supplied to the passenger compartment, and a refrigerant circulation section in which the refrigerant circulates to undergo heat exchange with the cold-air circulation section and the hot-air circulation section. The vehicle air-conditioning system separates an indoor air flow-path from an outdoor air flow-path to block outdoor air when performing air conditioning, and performs air conditioning of the passenger compartment using only the indoor air without entry of the outdoor air.