| 摘要 |
PURPOSE:To execute proper cleaning corresponding to the floor surface by disposing a detector for detecting the air quantity in the air passage of a power nozzle and varying the number of rotations of a rotating brush. CONSTITUTION:An air quantity detector 21 detects the air quantity in the air passage of the power nozzle, and when the air quantity is increased, an output voltage is increased. Namely, when the output of the air quantity detector 21 is increased, the emitter potential VA of a transistor 19 is raised to pass a current VA/RE set by an emitter resistor RE and the emitter potential VA to a capacitor 14 and when the output of the air quantity detector 21 is changed, the VA is changed to change a charging speed to the capacitor 14. Accordingly, the trigger timing of a bidirectional thyristor 11 is changed to change the power supplied to a motor 12 and change the number of rotations of the rotating brush of the rotating brush is automatically set corresponding to the air quantity to improve a utilization and automatically execute proper cleaning corresponding to the floor surface. |
