| 摘要 |
PURPOSE:To prevent the overopening or the like of various dampers easily further high accurately detected in their extreme end by additionally providing a detecting part, which detects the extreme end of the various dampers, in a variable resistor which detects a driven position of the various dampers by an actuator. CONSTITUTION:An actuator 1 drives various dampers in an automobile air conditioner, changing an air conditioning condition. While a comparator circuit 3 compares a signal from a variable resistor 12, detecting a driven position of a damper of every kind, with a signal from a temperature setter 2. Here in both ends of the variable resistor 12, an extreme end fixed terminal 16 is additionally provided. When the damper of every kind reaches its extreme end position, a stop signal is fed to an extreme end detecting circuit 5 from the extreme end fixed terminal 16. In this way, feeding the stop signal to a driving circuit 4, the actuator 1 is stopped by braking a servomotor 11. Accordingly, the overopening or the like in the damper of every kind can be prevented by enabling both the extreme ends of the damper of every kinds to be easily further high accurately detected. |
