Patent ID: 8728222

Claim:
A wet type dust collecting apparatus of a vacuum cleaner, the apparatus comprising: a first separating unit configured to filter out and discharge dust by rotating air which is inlet via a first air inlet, the first separating unit comprising an upper portion in which air circulates and a lower portion in which water circulates, wherein an interior wail of the upper portion comprises a horizontal cross-section that is narrower than a horizontal cross-section of an interior wall of the lower portion; an overflow prevention which protrudes from the interior wall of the lower portion and which prevents water that rises up the interior wall of the lower portion due to centrifugal force from contacting air in the upper portion; and a plurality of a second centrifugal separating units configured to filter out dust from the air which is discharged from the first separating unit, and configured to remove dust from the inlet air via water which is filled inside of the second centrifugal separating units.