| 摘要 |
<p>PURPOSE: An automatic variable volume damper is provided to easily control air volume by a switch. CONSTITUTION: An automatic variable volume damper comprises a power supply unit (110), a switch unit (120), a unit (130) for outputting a signal for controlling the reverse operation of a motor, a motor driving unit (140), a motor unit (150), and an emitting unit (160). The power supply unit supplies power to the motor. The switch unit outputs signals for setting the opening degree of a cover plate. The output unit outputs the signal for controlling the reverse operation of the motor. The motor driving unit reversely drives the motor according to the signals from the output unit. The motor unit outputs the signals for controlling the emitting when the motor rotates. The emitting unit is turned on according the signals generated from the motor unit.</p> |
