| 摘要 |
PURPOSE:To make the cleaning performance excellent without danger of motor locking, by connecting a floor nozzle driving motor in series to a thyristor which is driven by a power source connected in parallel with a motor blower which is in turn connected with the thyristor. CONSTITUTION:A series circuit is formed by the motor blower 2 which is connected to a power source 1 and the thyristor 3. A phase control circuit 4 is connected to the gate of the thyristor 3. A variable resistor 5 with a switch of the manual switch part is connected to the input terminal of the circuit 4. A power source part is formed by a diode 6, a resistor 7, and a capacitor 8, in parallel with the motor blower 2. Said power source part is connected to the gate of the thyristor 10, which is connected to the floor nozzle driving motor 9 in series through Zener diode 11. In this constitution, since motor 9 is not conducted when the input power to the motor blower is small but the motor 9 is conducted throughout all the AC periods when the input power is large, the motor locking does not occur, and the cleaning performance is made excellent. |
