| 摘要 |
PURPOSE:To suppress the uncomfortable feeling due to the noise generated during operation of a servomechanism for driving a damper by electrically detecting the operation state of a noise generating source in the interior of automobiles, such as blower, etc. and controlling the voltage applied onto the servomechanism according to said detection signal. CONSTITUTION:In a damper-driving controlling apparatus 10 which uses a servomotor 14 for turning and stopping a blowing-port switching damper 6 installed in an air conditioner body 1, a differential amplifier 14 which generates the output corresponding to the power voltage for a blower 3 as a noise generating source in the interior of an automobile is provided. Further, a voltage adjustor 35 into which the output of the amplifier is input and which controls the applied voltage for a motor driving circuit 15 is provided. When the blower 3 is in suspension state or is operated at a low speed, the noise due to the operation of the servomotor 14 is reduced by driving the servomotor 14 at a low voltage, and when the blower 3 is operated at high speed, rapid switching of damper is permitted by driving the servomotor 14 at high voltage. |
