DAMPER DRIVER

PURPOSE:To simultaneously drive many dampers by one or small number of drive motors by providing a plurality of transmitting passages for transmitting the rotation of a drive source to the shafts of the respective dampers, and a plurality of independent clutch mechanisms provided at the respective passages. CONSTITUTION:A damper driver 30 has a drive motor 31, electromagnetic clutches 32, 33, transmits the drive force of a drive motor 31 to damper shafts 45, 46, and drives an air mixing damper 5 and a mode switching damper 9. Second pulleys 36, 39 in contact with a first pulley 35 are mounted on shafts 47, 48 of the clutches 32, 33. When a solenoid 50 is conducted, a second protrusion 55 is attracted by its magnetic force to move the entire shaft 47 and the pulley 36 in a direction A, and the pulley 35 is brought into contact with the pulley 36. A protrusion 38a provided at a fourth pulley 38 turns ON, OFF air mixing damper 5 positioning microswitches 59, 60. The similar positioning structures are also provided at the other dampers.