Patent ID: 8695159

Claim:
A vacuum cleaner comprising: an air inlet opening located in the bottom of a first chamber, an air outlet opening located in the wall of a second chamber, wherein a dividing wall separates the first and second chambers, a rotatable separator located at the top of the first chamber configured for separating air and airborne particles, which separator comprises at least one air entrance opening located between the air inlet opening and the air outlet opening, air-guide means located beneath the separator configured for guiding at least part of the air towards the separator, and further configured for shielding the rotatable separator from said airborne particles, a vacuum fan located in the second chamber arranged between the separator in the first chamber and the air outlet opening located in the wall of the second chamber, wherein the vacuum fan has a larger diameter than the separator, wherein the separator comprises a fan, wherein the rotatable separator is arranged in the second chamber between the dividing wall separating the first and second chambers and the air-guide means, wherein said air-guide means provides in use an at least partially closed boundary in axial direction for a column of rotating air around the separator, wherein a minimum distance (R ag ) of an edge of the air-guide means to the rotating axis of the separator is larger than a distance (R s ) of the air entrance opening of the separator to the rotating axis of the separator.