DEHYDRATING METHOD FOR EVAPORATOR OF VEHICLE

摘要

PURPOSE: A dehydrating method for an evaporator in an air-conditioner of a vehicle is provided to prevent problems caused by depletion of a battery and enable the evaporator to be properly dried as well by monitoring the dried state of the evaporator and driving a blower motor according to the humidity of the evaporator. CONSTITUTION: A dehydrating method for an evaporator in an air-conditioner of a vehicle is as follows. When an engine is off, whether the voltage of a battery is over a reference voltage is determined(S10). Whether the air-conditioner had operated before the engine off is determined(S20). If the battery voltage is over the reference voltage and the air-conditioner had operated, the humidity of air blown by a blower motor is sensed by a humidity sensor(S30). Whether the sensed humidity is over a reference humidity is determined(S40). If the sensed humidity is over the reference humidity, a changeover period between a defog mode and a vent mode and a driving voltage of the blower motor are set according to the sensed humidity(S50). An air-conditioning mode is changed according to the set conditions and the set driving voltage is applied to the blower motor, thereby drying an evaporator(S60). Whether the changeover period between the defog mode and the vent mode is reached is determined during the drying step and, if so, the vent mode is changed into the defog mode and control is returned to the humidity sensing step(S70). [Reference numerals] (AA) Start(Engine OFF); (BB) Switch into a defog mode; (CC) Convert a TEMP door to a MAX COOL mode; (DD) Drive a blower motor; (EE) Switch into a defog mode; (FF) End; (S10) Battery voltage >= Reference voltage ?; (S20) Air-conditioner operated before the engine OFF?; (S30) Sense the humidity of blowing wind with a humidity sensor(of windshield glass); (S40) Sensed humidity >= Reference humidity ?; (S50) Set a mode changeover period and set a blower motor driving voltage; (S60) Change into a vent mode and apply the blower motor driving voltage; (S70) Mode changeover period reached?