Patent ID: 7537625

Claim:
A multi cyclone dust separating apparatus, comprising: a first cyclone unit comprising a housing, a first cyclone chamber centrifugally separating dust from air, a chamber outer wall forming the first cyclone chamber, a first inlet and a first outlet; a second cyclone unit comprising a plurality of cyclones arranged along an inner circumference of the housing such that minute dust is centrifugally separated from air that is drawn in from the first cyclone unit, and each one of the plurality of cyclones comprises a second cyclone chamber, a second chamber outer wall forming the second cyclone chamber, a second inlet, and a second outlet; a cover unit mounted at upper sides of the first and second cyclone units, in which the air that is discharged from the first cyclone unit is guided into the second cyclone unit, and the air that is discharged from the second cyclone unit is discharged to the outside; and a dust collecting unit that collects dust that is separated from the air in the first and second cyclone units, wherein the second inlet of each one of the plurality of cyclones of the second cyclone unit is lower than the first inlet of the first cyclone unit.