Patent ID: 6406506
Filing Date: 2002-06-18
Classification: B01D

Abstract:
A powered air cleaning system for separating heavier-than-air particulate debris from debris laden air to provide a clean air flow, said system comprising:a flow path extending through the system from an inlet to an outlet; a fan located along the flow path to draw debris laden air into the inlet and rotate it about an axis to form a rotating flow pattern that stratifies the debris laden air with the heavier particles of debris in the outermost orbits of the rotating flow pattern; a first isolation region in the flow path where particles of debris are removed from the flow to clean the air; a reduced cross sectional area portion in the flow path downstream of the first isolation region to increase the velocity of clean air flow to induce momentum forces to any remaining debris in the clean air flow; and a second isolation region in the flow path downstream of the reduced cross sectional area portion where remaining debris is removed from the flow to further clean the air; wherein the fan is located along the flow path between the first and second isolation regions.