HOUSING ASSEMBLY FOR A VACUUM CLEANER

摘要

A motor housing for a vacuum cleaner includes a main body, a peripheral rim, and an interconnecting base bounding portions of a working a ir chamber. A portion of the peripheral rim defines a sidewall having a plurali ty of vanes and a plurality of exhaust openings, with the vanes and the exhaust openings cooperating to exhaust air from the working air chamber in response to rotation of the impeller. Each of the vanes having an airfoil-shaped cros s section, and each vane is oriented such that the airfoil of each vane is oriented oppositely relative to the airfoil of its adjacent vanes. Thus, a first set of the vanes are positioned to direct air through the exhaust openings, while a second set of vanes are positioned to direct excess air from adjacent the exhaust openings toward the chamber and back into the flow pattern. The excess air i s thus smoothly remixed at a different velocity with the air moving through th e working air chamber such that synchronization of the air flow is reduced, an d harmonic induced noise is minimized.