| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a dehumidifier and to prevent the fogging of a window glass under a high load condition at the same time in a vehicle air conditioner provided with a dehumidifier constituted separately from a cooling heat exchanger. SOLUTION: During heating, both of internal air and external air are introduced into an air conditioner case 107 to warm the inside of a car room, a dehumidifier 10 is operated to remove humidity, and the mixture of internal air and external air is blown out from a defroster opening 125. A temperature TS in the inner surface of a vehicle window glass is calculated, and the humidity XW of air reaching a dew point at the temperature TS in the inner surface of the window glass is calculated. The mixing ratio of the internal air and the external air is adjusted such that a relationship of the defroster blowing air humidity XD to the glass temperature dew point humidity XW satisfies XW>=XD.
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