| 摘要 |
PURPOSE:To enhance the suction force or the rotational force of a brush in accordance with a contaminated state of a floor surface by controlling rotation of a motor-driven air blower and a motor in response of an operation of a dust detector. CONSTITUTION:When suction dust flowing through a suction air course 4 cuts off a light beam of a light emitting diode 33, the received light quantity of a photodiode 35 decreased and an output becomes small, and as a result, transistors 45, 46 in which the photodiode 15 is connected to its bases become an OFF state and transistors 47, 48 become an ON state, respectively, and a light emitting diode 49 which becomes a display part is turned on. Also, by operation of a relay 42 connected in series to the light emitting diode 49, and a relay switch 42'', a rotation of a motor-driven air blower 2 contained in a body 1 is controlled and suction air is enlarged against a contaminated floor face, and also, a light emitting of the light emitting diode 49, and also, the rotation of the motor-driven air blower 2 provided on the body 1 and a motor 18 provided on a floor brush 10 are controlled simultaneously. |
