VACUUM CLEANER

PROBLEM TO BE SOLVED: To provide a vacuum cleaner in which, while preventing smoke generation and firing of a motor-driven blower based on the friction between a commutator and a brush, input to the motor-driven blower can be returned to a state before the input is reduced timely and appropriately if recovery of a spark generation amount is expected.SOLUTION: A vacuum cleaner 1 includes: a motor-driven blower 8 having a commutator 48 and a brush 52; a spark detection part 58 for detecting the magnitude of a spark generated by the friction between the commutator 48 and the brush 52; and a body control part 9 that calculates an estimated next value from a difference between a previous value and a current value in a detection result obtained by the sampling by the spark detection part 58, changes the input to the motor-driven blower 8 so that an absolute value of a difference between the estimated next value and an actual next value in a detection result obtained by the sampling by the spark detection part 58 falls within a prescribed value Is determined beforehand during a predetermined monitoring time Ts, causes the motor-driven blower 8 to be operated accordingly, and after changing the input to the motor-driven blower 8, changes the monitoring time Ts.SELECTED DRAWING: Figure 3 【課題】整流子とブラシとの摩擦に基づく電動送風機の発煙・発火を未然に防ぎつつ、火花発生量の回復が見込まれる場合には適宜、かつ適切に電動送風機の入力を低減前の状態に戻すことができる電気掃除機を提供する。【解決手段】電気掃除機１は、整流子４８とブラシ５２とを有する電動送風機８と、整流子４８とブラシ５２との摩擦によって発生する火花の大きさを検知する火花検知部５８と、火花検知部５８がサンプリングする検知結果の前回値と今回値との差から予測次回値を算出し、予測次回値と火花検知部５８がサンプリングする検知結果の実次回値との差の絶対値が予め定める監視時間Ｔｓ中予め定める所定値Ｉｓに納まるよう、電動送風機８の入力を変化させて電動送風機８を運転する一方で、電動送風機８の入力を変化させた後は監視時間Ｔｓを変化させる本体制御部９と、を備える電気掃除機。【選択図】 図３