Air delivery system for an impingement food preparation oven
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 2, 1986
Grant Date -
N/A
app pub date -
Apr 16, 1984
filing date -
Apr 16, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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 multi-tapering surface tapering from the front wall openings inwardly of the plenum toward the fan, whereby the axially directed flow of heated air from the fan is smoothly and uniformly directed by the multi-tapering surface to the plurality of air ducts, thereby providing a uniform cooking temperature in the cooking chamber.
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