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Electric vacuum cleaner

  • US 6,664,748 B2
  • Filed: 03/20/2002
  • Issued: 12/16/2003
  • Est. Priority Date: 05/23/2001
  • Status: Expired due to Fees
First Claim
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1. 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.

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