| 摘要 |
PROBLEM TO BE SOLVED: To reduce the decline of a suction air flow for almost all dust to be sucked by a vacuum cleaner for a domestic use. SOLUTION: A plurality of turning air flow ventilation paths 22 capable of peeling the dust stuck to the surface of a dust removing filter 23 by a turning air flow are equipped, and a guide valve 30 capable of switching an air flow amount to be introduced to the turning air flow ventilation paths 22 is provided. While maintaining high suction force usually, the turning speed of the turning air flow ventilation path 22 selected by the changeover of the guide valve 30 is increased, and a state with an improved peeling effect is created. Thus, clogging is prevented even for the dust which cannot be peeled off before, and the decline of the air flow is reduced. COPYRIGHT: (C)2011,JPO&INPIT
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