Patent ID: 7677050

Claim:
A control device for a fan motor which cools a condenser of a vehicle air conditioner by generating an airflow passing through the condenser, the condenser liquefying a refrigerant discharged from a compressor, comprising: a temperature sensor which detects a temperature of an air that has passed through an evaporator of the vehicle air conditioner; and a controller functioning to: calculate a reference value of an airflow generated by a rotation of the fan motor which cools the condenser; calculate a temperature difference between air temperature detected by the temperature sensor and a target temperature set in accordance with a cabin temperature, wherein the cabin temperature is set by a driver; calculate a correction value of the airflow generated by the rotation of the fan motor which cools the condenser on the basis of the calculated temperature difference; set a first airflow for effecting a lower limit of a required cooling capacity of the air conditioner and a second airflow for effecting an upper limit of the required cooling capacity of the air conditioner; set a target airflow in a range between and inclusive of the first airflow and the second airflow, on the basis of the reference value and correction value of the airflow; and control the rotation of the fan motor to effect the target airflow.