MOTOR-FAN AND ELECTRIC VACUUM CLEANER THAT USES IT Russian patent published in 2010 - IPC A47L5/22 A47L9/22 

FIELD: personal use articles.

SUBSTANCE: inventions relate to electric vacuum cleaner and motor-fan used in it. Motor-fan comprises electric motor with rotary shaft, centrifugal fan fixed on rotary shaft of electric motor with multiple blades arranged separately between a pair of opposite plates, and diffuser having multiple blades, every of which is arranged on the side of outer peripheral section of centrifugal fan opposite to outlet holes for air formed on peripheral surface of centrifugal fan. Each of fan blades has the front end section, which is arranged so that it is linearly inclined from one end of final section of fan blade to its other end. Fan blades have section between the front disk plate arranged on side of inlet air hole and back plate arranged opposite to front plate and having the same diametre as diametre of front plate. The first end of front end section of fan blade is arranged on section displaced from outer peripheral end of front plate to the side of centrifugal fan axis, and the second end of front end section of fan blade is arranged on section displaced relative to the first end of front plate to the side of centrifugal fan axis. In version of motor-fan front end section may be curvilinearly inclined from one end of final section of fan blade to its other end. Electric vacuum cleaner comprises vacuum cleaner body and motor-fan arranged in vacuum cleaner body and having electric motor with rotary shaft.

EFFECT: fan with engine and electric vacuum cleaner using this fan may suppress or reduce generation of excessive noise even in case vacuum cleaner operates under conditions of low air consumption and in the area of high frequencies.

3 cl, 12 dwg, 2 tbl, 1 ex