| 摘要 |
PURPOSE:To easily obtain the comfortable humidity environment in car interior by installing an excessive-coldness detecting means for detecting the excessive coldness which represents the cloudiness of the window-glass inner surface and controlling a heating means for window glass and a humidifying means according to the output of the excessive-coldness detecting means. CONSTITUTION:During the traveling of a car, an electronic control circuit 30 takes-in the car-interior temperature Tin by an interior temperature sensor 16, relative humidity RH of the interior by a humidity sensor 18, and the temperature Tg of rear glass by a glass temperature sensor 24, and reads-out the dew point temperature Td in the interior from the map in a ROM52 according to Tin and RH. Then, the excessive coldness Ts is calculated from the equation: Ts=Td-Tg, and controls relays 34 and 36 according to Ts, and controls the amount of conduction to a defogger 22 and the turning-ON/OFF. When the defogger 2 is in OFF-state, it is judged that RH is below the proper relative humidity (rho) searched from the map according to Tin or not, and when the judgement is 'YES', a humidifier 12 is controlled to increase the amount of humidification to the max., and when the defogger 22 is strongly operated, the humidifier 12 is controlled to stop humifification. |
