FAN ASSEMBLY FOR VACUUM CLEANER Russian patent published in 2008 - IPC A47L5/22 

FIELD: personal effects.

SUBSTANCE: fan assembly (400) consists of motor (100), impeller (200), engaged to the motor with a capability of being rotated and equipped with a number of vanes, and diffuser (300), equipped with a number of vanes, located along outer girth of the impeller. In the first variant, diffuser vanes contain two parts, the second one being arranged at an angle relative to the first part, which is adjacent to outer girth of the impeller; height of the parts is different. In the second variant, vanes are divided into groups, so that a group contains vanes, adjacent to outer girth of the impeller; the vanes have different angles, and groups are set in recurrent order. In the third variant, more than a half of diffuser front end vanes, which are adjacent to outer girth of the impeller, has a sloped part and a vertical part, that obliques from it; vanes with only sloped part, and that with sloped and vertical parts, are set sequentially.

EFFECT: reduced noise of vacuum cleaner fan.

7 cl, 15 dwg