PURPOSE: To reduce the space and suppress the cost by setting a motor-driven blower in a plurality of power consuming conditions, and allowing a single display element in a display circuit to make display with different hues according to the power consuming condition at the time.
CONSTITUTION: The power consumption, the amount of dust in a vacuum cleaner, etc., are judged, and a microcomputer 10 controls the power consumed by a motor-driven, blower 8. A display circuit 21 has a multi-color light emitting element 22 which varies the hue and is controlled by drive circuits 23, 24 in conformity to signals given by the microcomputer 10. When a fuzzy switch of operating switches in a hose at-hand part is pushed, a hose at-hand circuit 17 transmits a signal to the microcomputer 10, and the drive circuit 23 sends current only to the c-a electrodes in between of display element 22, and a light emitting element gives a green indication. When an 'intense' switch is pushed, current flows only to the c-b electrodes in between of the display element 22 to generate a red indication solely and when a static switch is pushed, current flows to both c-a and c-b to generate green and red indications resulting in appearing as orange.
KAJI MASAKI
YAESAWA MASAHIRO
HITACHI TAGA TECH KK
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