Patent ID: 7966692
Filing Date: 2011-06-28
Classification: A47L,B04C

Abstract:
1. A multi-cyclone dust collector for a vacuum cleaner, comprising: a first cyclone unit causing dust-laden air sucked into a lower portion of the first cyclone unit to form a first upwardly whirling air current so as to separate contaminants from the dust-laden air by centrifugal force and to cause partially clean air, from which the contaminants are removed, to discharge downwards; and a second cyclone unit disposed under the first cyclone unit, the second cyclone unit causing the partially clean air, which is downwardly discharged from the first cyclone unit, to enter into a lower portion of the second cyclone unit, to form a second upwardly whirling air current so as to separate fine contaminants from the partially clean air by centrifugal force, and to cause clean air, from which the fine contaminants, are removed to discharge downwards, wherein the first cyclone unit comprises: