Patent ID: 7556662

Claim:
A multi-cyclone dust separating apparatus, comprising: a multi-cyclone unit including, a first cyclone chamber body having a first cyclone chamber and at least one protection chamber formed around at least a portion of an outer circumference of the first cyclone chamber, and at least one secondary cyclone chamber body disposed in the at least one protection chamber, the at least one secondary cyclone chamber body having at least one secondary cyclone chamber; a cover unit adapted to connect to an upper end of the multi-cyclone unit and configured to guide air discharged from the first cyclone chamber to the at least one secondary cyclone chamber; a dirt collecting unit adapted to connect to a lower end of the multi-cyclone unit and configured to collect dirt separated from the air in the first and the secondary cyclone chambers; and an air discharge duct disposed proximate to a center of the cover unit and the dirt collecting unit and configured to downwardly discharge air that has passed through the at least one secondary cyclone chamber through the multi-cyclone unit and the dirt collecting unit.