FILTERING UNIT AND CYCLONE DUST-ARRESTING EQUIPMENT CONTAINING THIS UNIT Russian patent published in 2008 - IPC A47L9/16 B04C5/13 

FIELD: items of personal use and for household.

SUBSTANCE: filtering unit is used in cyclone dust-arresting equipment separating impurities by centrifugal mode from the drawn-in air providing their removal and meant for a vacuum cleaner. The filtrating unit contains connected with the cyclone body connecting part and connected to it filtering part of conic configuration of the diameter diminishing in the direction from the connecting part. The filtrating part is made in the form of a spiral element situated in the direction of moving of the drawn-in air flow with formation of an air duct around the filtering part meant for directing of the drawn-in air into the filtrating part providing the possibility of passing of the first drawn-in air portion in the direction perpendicular to the central axis of the filtrating part and passing of the secong drawn-in air in the direction parallel to the mentioned axis. The connecting part is connected with the end of the filtrating part providing connection with the cyclone body of the cyclone dust-arresting equipment, and the filtrating part is situated coaxially with the connecting part. The cyclone dust-arresting device contains a cyclone body with an air inlet meant for drawing in of impure air, an air outlet is for air discharge, and the cyclone chamber is for separation of impurities from the air with the filtrating unit in it for filtration of the drawn-in air. The cyclone chamber contains an inner wall in the shape of the turned over cone corresponding to the filtrating part form, the primary cyclone chamber and the second cyclone chamber meant for centrifugal separation of impurities from the air in two stages.

EFFECT: increase of dust separation efficiency.

11 cl, 10 dwg