Patent ID: 7698777

Claim:
A vacuum cleaner comprising: an electric blower; an electric blower controller for controlling the electric blower; an electric blower current detector for detecting at least a current flowing in the electric blower; a dust chamber provided upstream of the electric blower for collecting dust particles sucked by the electric blower, a cleaning mode detector for detecting whether the vacuum cleaner is in a flooring cleaning mode or a non-floor cleaning mode, wherein a predetermined level of a current is made to flow in the electric blower regardless of a dust particle amount in the dust chamber, and when the vacuum cleaner is in the non-floor cleaning mode, an operation of an electric motor is stopped and then the current of the electric blower is increased by as much as a decrement in a current of the rotational brush or the electric motor caused by stopping the rotational brush or the electric motor, and a time counter for detecting a duration of the non-floor cleaning mode of the vacuum cleaner, wherein, if the non-floor cleaning mode is shorter than or equal to a predetermined time period, the current of the electric blower is not increased.