Patent ID: 8007565
Filing Date: 2011-08-30
Classification: B01D

Abstract:
1. A powered air cleaning system for supplying clean air with a positive airflow pressure out of an outlet of the system to an air inlet of a device with which the system is used, the system comprising: a flow path extending through the system from an inlet to an outlet; a motor-driven fan located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow; a separator-ejector chamber in the flow path downstream of the motor-driven fan, the outermost orbits of the orbits of the rotating flow riding on an outer wall of the separator-ejector chamber; an ejector port located at a downstream end of the chamber for ejecting particulate debris laden air from the stratified rotating flow in the system, the outlet being located centrally within the downstream end of the chamber; at least one de-swirl blade located within the rotating flow in the chamber and extending into the outlet for redirecting clean air from the innermost orbits of the stratified rotating flow in the chamber toward the outlet to provide a positive airflow pressure out of the outlet.