Patent ID: 7879120

Claim:
A multi-cyclone dust-collecting apparatus for a vacuum cleaner mounted in a main cleaner body to separate dust from air flowing from a suction port body and collect the dust separated from the air, the apparatus comprising: a dust-separating unit comprising a primary cyclone unit to separate large dust particles contained in the air flowing from the suction port body, and a secondary cyclone unit that is disposed inside the primary cyclone unit and that tapers downwards; and a dust-collecting unit detachably mounted in a lower portion of the dust-separating unit, the dust-collecting unit comprising a first dust-collecting chamber to collect the large dust particles discharged from the primary cyclone unit, and a second dust-collecting chamber disposed inside the first dust-collecting chamber to collect fine dust particles discharged from the secondary cyclone unit, wherein the first dust-collecting chamber is greater in volume than the second dust-collecting chamber, and wherein the secondary cyclone unit comprises a plurality of cone-shaped cyclones disposed around the circumference thereof, and the plurality of cone-shaped cyclones are inclined so that lower ends thereof face the center of the secondary cyclone unit.