| 摘要 |
PURPOSE:To eliminate the need for using a particular rotation limiting switch by making a position control means output a stop signal for a servomotor when the arrival of said servomotor at at least one stop position within an operating range is detected by detecting means. CONSTITUTION:After air is cooled by passing through an evaporator 9, the quantity of air is regulated by a temp. regulating damper 2 when passing through a heater core 10 and, thereby, its temp. is controlled. The damper 2 is driven by a servomotor 101, and its operating position is detected by a potentiometer 102. And, the servomotor 101 is feedback controlled by the position control part A of a control device 1 according to the output of the potentiometer 102. Also, an operation limiting means B is provided on the control device 1, which makes the position control part A output a servomotor stop signal when the arrival of the servomotor 101 at a defined stop position is detected from the output of the potentiometer. |
