Food dehydrator and fan therefor

Details Food dehydrator and fan therefor Food dehydrator and fan therefor

1975-06-30

1977-07-19

Sprague, Kenneth W.

Rotary kinetic fluid motors or pumps

Axial flow runner with blades extending radially inward and...

Serial flow through inward and outward extending blade rows

34196, F04D 2932

Patent

active

040365620

ABSTRACT:
A dehydrator for the drying of small articles including a cabinet having a series of vertically spaced trays offset from a relatively large diameter fan blade structure. The fan blade structure drives air through a first airflow zone of cylindrical configuration while a second airflow zone, located interiorly of the first zone, is occupied by an airflow opposite in direction to the first airflow and induced by a negative pressure area rearward of the fan blade. The negative pressure area is communicated to the dryer by means of the fan blade's apertured central area. Said negative pressure area rearward of the fan blade receives a flow of air through the fan blade which flow is recirculated past a heat source whereupon the fan vanes again drive the air past the articles being dried. A modified form of fan blade structure incorporates vane components located in the central area of the blade to assist in air recirculation.

REFERENCES:
patent: 1377827 (1921-05-01), Garela
patent: 1462151 (1923-07-01), Seymour
patent: 1991194 (1935-02-01), Child
patent: 2017728 (1935-10-01), Oskamp

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