FAN OPERATION CIRCUIT FOR EASILY CONTROLLING OUTPUT OF FAN MOTORS BY CONNECTING RADIATOR FAN MOTOR WITH CONDENSER FAN MOTOR IN PARALLEL STRUCTURE IN VEHICLE

摘要

PURPOSE: A fan operation circuit for a vehicle is provided to variably change the performance at a low speed by connecting a radiator fan motor with a condenser fan motor in the parallel structure, to increase the wind force, and to reduce the noises by making the power consumption of the radiator fan motor larger than that of the condenser fan motor at a low speed. CONSTITUTION: A radiator fan motor(30) and a condenser fan motor(20) are electrically connected with a vehicle battery(10) in the parallel structure. A relay unit is placed between the connection point of the fan motors and the vehicle battery to control the voltage applied to the fan motors. The relay unit includes a first relay(RLY1) installed to apply the voltage to the fan motors and a second relay(RLY2) directly connected with a resistor(R).