Measuring circuit for use in device for detecting ambient air temperature.

摘要

A device for controlling an opening angle of an air mix damper used in an automotive air conditioning system is disclosed. The device has an actuator for operating air mix dampers and a blower for blowing the air. The device comprises an ambient air temperature sensor which is disposed on a front grille for detecting an ambient air temperature of an automobile and provides a control signal, and a measuring circuit which measures an ambient air temperature data necessary for controlling the actuator and blower based on the detected ambient air temperature. The device controls the opening angle of an air mix damper in accordance with the measured results. Therefore, the automobile compartment air temperature can be suitably controlled.