JPS6470250A - Demister device of air conditioner for automobile - Google Patents

Abstract

PURPOSE:To carry out proper demisting in accordance with a humidity condition by detecting the humidity in an automobile room, comparing it with a defined value, obtaining the rate of change and, at the time of more than a defined value, electrifying a heat generating body in a window glass, and controlling the electrifying time in accordance with the rate of change. CONSTITUTION:The humidity in an automobile room is detected by means of a humidity sensor 3 while detecting outside-air temperature by means of an outside-air temperature sensor 4 as necessary. The values of these are input ted into a microcomputer 7 via a multiplexer 5 and an A/D converter 6 to compare the detected value of the humidity in the room with a defined value while obtaining the rate of change thereof. When the detected value of humidity is above the defined value, the heat generating body 2 of an window glass 1 in which the heat generating body 2 is laminated between laminated glasses 1a, 1b is electrified via an energization circuit 8. The energization time is con trolled by a timer in accordance with the rate of change of humidity. Thereby, proper demisting in accordance with a temperature condition can be carried out, without causing wasteful electrification and saving energy.