Patent ID: 7222666

Claim:
A vehicle air-conditioning apparatus for a vehicle including a windshield, the vehicle air-conditioning apparatus comprising: dehumidification means for dehumidifying an inside of the vehicle, the dehumidification means including a compressor and switch means for activating the compressor; humidity calculation means for calculating humidity in the vicinity of an inside surface of the windshield; determination means for determining whether the windshield is fogged on the basis of a comparison, between the calculated humidity and a predetermined value in a state where the switch means is turned off; and means for performing a defogging operation for heightening dehumidifying performance of the dehumidification means when the determination means determines that the windshield is fogged in a state where the switch means is turned on, wherein either the dehumidifying performance of the dehumidification means is lowered or a humidity condition in which the defogging operation is initiated is increased for the next defogging operation, when the windshield is determined to be fogged and the defogging operation is not manually performed in the state where the switch means is turned off.