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US 11,076,604 B2Granted
Convection oven
AssigneeDuke Manufacturing Co.
InventorsRobert J. Reese, James W. Bigott, Amit Pachauri, Kim Charles Fietsam, Gregory Glen Stettes, Daryl R. Monroe
Life of this patent
Estimating the term…
Abstract
Ovens and methods for preparing food. An oven includes a cabinet and an oven chamber in the cabinet. A fan is provided for moving gas in the oven. The oven can include a fan scroll housing having multiple fan discharge ducts defining respective gas flow paths from the fan. The oven can include a turning vane configured for turning gas flow and for heating the gas flow.
Claims24
A convection oven comprising:
- a cabinet having a top, bottom, front, rear, left side, and right side,
- an oven chamber in the cabinet sized for receiving food,
- recirculation ducting for recirculating gas from the oven chamber back to the oven chamber, the recirculation ducting including a fan scroll housing,
- a centrifugal fan in the fan scroll housing for moving gas from the recirculation ducting to the oven chamber, the centrifugal fan having a fan axis about which the fan is rotatable in a rotation direction to move gas radially from the fan in the fan scroll housing, and
- a heating mechanism in the cabinet for heating the gas,
- wherein the fan scroll housing includes multiple fan discharge ducts defining respective gas flow paths from the fan, the fan scroll housing defining multiple cutoffs adjacent the fan for dividing gas flow from the fan to said fan discharge ducts, each fan discharge duct including opposite first and second discharge duct walls downstream from respective cutoffs, each first discharge duct wall including a volute wall section having a concave surface facing the gas flow path of the respective fan discharge duct, and each volute wall section extending at least partially around the centrifugal fan in the rotation direction and increasing in distance from the fan axis as the volute wall section extends in the rotation direction around the centrifugal fan,
- wherein each second discharge duct wall includes an eddy wall section configured to create an eddy in the gas flow path.
4 more elements
A convection oven comprising:
- a cabinet having a top, bottom, front, rear, left side, and right side,
- an oven chamber in the cabinet sized for receiving food,
- at least one outlet for delivering gas to the oven chamber,
- at least one exhaust for exhausting gas from the oven chamber,
- recirculation ducting defining a recirculation gas flow path for flow of gas from the at least one exhaust to the at least one outlet for recirculating gas from the oven chamber back to the oven chamber,
- a fan in the recirculation ducting for moving gas along the recirculation gas flow path, and
- at least one turning vane in the recirculation ducting, the turning vane being configured for turning gas flow in the recirculation ducting from a first direction toward a second direction transverse to the first direction for following the gas flow path, the turning vane comprising a heating mechanism for heating gas in the recirculation ducting.
4 more elements
Dependencies are inferred from the claim text.