Drying and gas or vapor contact with solids – Apparatus – Houses – kilns – and containers
Patent
1989-08-17
1991-02-19
Bennet, Henry A.
Drying and gas or vapor contact with solids
Apparatus
Houses, kilns, and containers
34 90, F26B 1900
Patent
active
049931725
ABSTRACT:
There is provided a hand drier comprising: a rigid housing having an air inlet and an air outlet; a flow passage through the housing having the inlet as its upstream end and the outlet as its downstream end; a fan incorporated in the flow passage the fan being in the form of a backward curved multi-bladed radial flow device; a heat transfer volume incorporated in the flow passage, the volume housing a heating element; a motor mounted in the housing for driving the fan, the motor being a brushless direct current device; and control means for operating the motor and heating element. The term `backward curved` applied to a blade refers to a blade which, when viewed along the axis of rotation of the fan, has a root from which the blade extends both outwardly and backwardly relative to a radius from the axis of rotation extending through the root. Thus relative to the direction of travel the root is the leading part of the blade and the outer end the trailing part. Among major benefits arising from the use of a brushless direct current motor are: the shape of the motor which takes the form of a cylinder with a small height by comparison with its diameter which is a convenient shape to include within a small overall heater envelope; and the achievement of a high operating speed without excessive noise generation.
REFERENCES:
patent: 2438762 (1948-03-01), McLeckie
patent: 3305938 (1967-02-01), Goldstein
patent: 3603002 (1971-09-01), Spierer
patent: 3744149 (1973-07-01), Helbling
patent: 4087925 (1978-05-01), Bienek
patent: 4383377 (1983-05-01), Crafton
patent: 4665630 (1987-05-01), Postbeschild
patent: 4707933 (1987-11-01), Keck et al.
Airdri Limited
Bennet Henry A.
Gromada Denise L.
LandOfFree
Hand drier with backward curved impeller fan does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hand drier with backward curved impeller fan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hand drier with backward curved impeller fan will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1133366