Vacuum cleaner

Vacuum cleaner including a suction fan driven by an electric motor, a suction nozzle connected to an intake side of the fan via a dust container, and a cord for supplying electric power to the motor, wherein the motor is electronically controlled and adapted to be driven at a speed such that the suction fan operates at a speed amounting to at least 50,000 rpm and the suction fan comprises a turbo fan wheel-type impeller, wherein an air intake duct for the suction fan is provided, said air intake duct having an hour-glass shape with a central throttle section and a pair of end sections, said end sections being relatively wider than said central throttle section, blades of the impeller closely fitting against the surrounding air intake duct in the area of the throttle section, forming a very narrow gap which, at the outlet side, passes into an annular curved duct diverting the exhaust air from a radial direction into an axial direction.