Reduced-noise ducted flow hair dryer with multiple impellers and

Details Reduced-noise ducted flow hair dryer with multiple impellers and Reduced-noise ducted flow hair dryer with multiple impellers and

1998-11-23

2000-01-04

Jeffery, John A.

Electric resistance heating devices

Heating devices

Concentrated heated air stream

34 97, 416120, A45D 2010, F24H 300

Patent

active

060119039

ABSTRACT:
An axial flow hair dryer comprises a generally circular main housing with a transitional portion that smoothly reduces the housing diameter to an outlet. A first fan stage in the main housing generates an axial air flow through the housing. An outer duct has two axial extensions secured to the housing near the beginning of the transitional portion, and the housing air outlet introduces air exiting the housing into the outer duct. The housing and the outer duct form two additional ambient air intakes extending between the axial extensions in a smooth arc toward the main housing outlet. A second fan stage includes a second axial flow impeller in the outer duct for generating air flow through the ambient air intake. The second axial flow impeller includes inner and outer blades separated by an annular shroud that forms an extension of the main housing flow passage. A guide duct in the outer duct forms a further extension of the extended air flow passage, and the guide duct includes stator vanes at its outlet. A handle depending from the main housing holds a motor and a flex shaft connects the motor to a drive shaft that carries both fan stages. Resistance heating wires in the main housing heat the air flowing through the hair dryer.

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