Dust collector, especially for vacuum cleaners

The invention relates to a dust collecting means (5) for a vacuum cleaner provided with a supplied to the rotation of the dust laden, via an air inlet (17) suction air separation space (6) having a peripheral outer wall (7), a circumferential inner wall (8) and an upper Abscheideraumdeckflache (9), and located with a reduced flow velocity, below the separating chamber (6) dust collection chamber (12), which via an annular gap (11) is connected to the separating chamber (6), wherein the radial extent (S) of the gap ( is 11) is less than 4.5 mm. The invention further relates to a dust collecting means (5) for a vacuum cleaner provided with a supplied to the rotation of the dust laden, via an air inlet (17) suction air separation space (6) having a peripheral outer wall (7), a circumferential inner wall (8) and a upper Abscheideraumdeckflache (9), and with a reduced flow velocity, below the separating chamber (6) located dust collection chamber (12), which via an annular gap (11) is connected to the separating chamber (6), wherein the ratio between the radial extension (S ) is of the gap (11) and the inner diameter (D) of the circumferential outer wall (7) 0.0045 to 0.02. The invention further relates to a vacuum cleaner with a motor-fan unit and such, disposed in a dust chamber dust collecting means (5), wherein the motor-fan unit (2) for a suction power of between 35 l / s and 45 l / s, is provided in particular of approximately 40 l / s. The invention improves the dust collection efficiency of the dust collecting means (5) at a low constructional expenditure.