Patent ID: 9573439
Date: 2017-02-21
CPC Classifications: B60H,F25B

Claim:
1. An air conditioner for a vehicle, comprising: a casing defining an air passage through which air to be blown into a vehicle compartment passes; a cooling heat exchanger arranged in the casing to cool air; a compressor of a refrigerant cycle, configured to adjust a cooling temperature of air cooled at the cooling heat exchanger; a dew-point detector configured to detect a physical amount relevant to a dew-point temperature in the casing, the dew-point detector including a humidity detection portion which detects a humidity in the casing; a target temperature determination portion configured to determine a target cooling temperature which is a target temperature of the cooling temperature; a compressor control portion configured to control the compressor such that the cooling temperature approaches the target cooling temperature; and a dryness determination portion configured to determine whether an outer surface of the cooling heat exchanger is dry or not, based on the humidity, which is detected by the humidity detection portion in a stop time of air conditioning of the vehicle compartment, wherein the target temperature determination portion determines the target cooling temperature to be any one of a plurality of target temperatures including a first target temperature that is lower by a predetermined degree than the dew-point temperature, when the dryness determination portion determines that the outer surface of the cooling heat exchanger is not dry, the target temperature determination portion determines the target cooling temperature to be any one of the plurality of target temperatures other than the first target temperature (i) when the dryness determination portion determines that the outer surface of the cooling heat exchanger is dry and (ii) when the stop time of air conditioning of the vehicle compartment is longer than a predetermined criterion time that is set to be long enough for condensation water on the outer surface of the cooling heat exchanger to evaporate.