Air delivery system for an impingement food preparation oven inc

Stoves and furnaces – Stoves – Cooking

Patent

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Details

34218, 34225, 219400, 99443C, 99447, 416238, 416228, 432145, 432199, A21B 100

Patent

active

045560439

ABSTRACT:
An improved air delivery system is provided for an impingement food preparation oven including a plurality of air ducts disposed in a cooking chamber, a plenum connected to the air ducts, and a scoop-type fan disposed in a backwall opening of the plenum to provide a flow of heated air smoothly and uniformly through the plenum into the air ducts. The fan device includes a plurality of tear-drop shaped blades, wherein each blade has a leading edge portion that tapers to a point in the direction of rotation and a trailing row portion at a given pitch angle for forcibly moving the flow of air in an axial direction toward the plenum front wall. The plenum front wall has a plurality of openings connected to the duct members, and a centrally disposed conical surface projecting outwardly toward the fan so that the axially directed flow of heated air from the fan is smoothly and uniformly directed by the conical surface the plurality of air ducts so as to provide a uniform cooking temperature in the cooking chamber.

REFERENCES:
patent: 2212041 (1940-08-01), Pfautsch
patent: 2616617 (1982-11-01), Hill
patent: 2841326 (1958-07-01), Davis
patent: 3568331 (1971-03-01), Loveday
patent: 3656469 (1972-04-01), Jung
patent: 3719180 (1973-03-01), Pere
patent: 3978843 (1977-09-01), Durth
patent: 4039278 (1977-08-01), Denholm
patent: 4059399 (1977-11-01), Cellier
patent: 4438572 (1984-03-01), Kaminski
patent: 4462383 (1984-07-01), Henke et al.

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