Patent ID: 6664748
Filing Date: 2003-12-16
Classification: A47L,H02J

Abstract:
An electric vacuum cleaner comprising:a motor-driven blower driven with a DC power supply as a drive source; voltage converting means for boosting a voltage output from the DC power supply and supplying power to the motor-driven blower; switching means for switching an operation mode of a non-boost operation mode for outputting the output voltage of the DC power supply to the motor-driven blower and a boost operation mode for outputting the output voltage boosted by the voltage converting means to the motor-driven blower; an operation mode switching control unit for selecting the non-boost operation mode or the boost operation mode; and electric vacuum cleaner control means for controlling the switching means according to a select operation of the operation mode switching control unit and thereby switching between the operation modes for the motor-driven blower, wherein the operation mode switching control unit is provided with a boost control part for selecting the boost operation mode, and when rotational driving of the motor-driven blower is stopping and the boost control part is selected, the electric vacuum cleaner control means allows the boost operation mode after the non-boost operation mode.