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US 6,655,373 B1Granted
High efficiency conveyor oven
AssigneeMiddleby Marshall Inc.
InventorJohn Hammons Wiker
Life of this patent
Estimating the term…
Abstract
A conveyor oven is heated by inshot burners, which eliminate blowers, ducts, and motors heretofore required to supply a force draft of combustion air to the burners. Apertures in front of the inshot burners have a diameter that regulates the amount of combustion air that is delivered to the burners. The only blower in the oven is the one required to circulate and recirculate hot air within the oven which produces three pressure zones that causes an induced draft of combustion air for the inshot burner. A modulating valve adjusts the flow of gas to the inshot burners.
Claims16
A conveyor oven comprising:
- a heated chamber having a conveyor for transporting food products therethrough;
- a heat source having a gas fired burner for heating the chamber, the burner being situated to receive air from the ambient atmosphere via a flow path that includes no pressure generating equipment;
- and
- a heat delivery system for delivering heat from the heat source to the chamber, the heat delivery system having a blower for both inducing a draft of combustion air through the burner and circulating the air heated by the burner through the chamber, the blower communicating with the burner and the heated chamber via a combined flow path that is situated to receive a mixture of fluid from the burner and fluid from the heated chamber.
1 more element
A conveyor oven comprising:
- a first zone having a burner for heating the oven, the burner being situated to receive air from the ambient atmosphere via a flow path that includes no pressure generating equipment;
- a second zone having a plenum adjacent to and in communication with the first zone;
- a third zone adjacent to and in communication with the plenum, the third zone having a heated chamber with a conveyor for transporting food therethrough;
- and
- a blower disposed in the first zone for creating a pressure differential between the first zone, the plenum and the ambient pressure of the oven to induce a draft of combustion air through the burner and circulate the air heated by the burner through the plenum and chamber, the blower communicating with the burner and the heated chamber via a combined flow path that is situated to receive a mixture of fluid from the burner and from the heated chamber.
2 more elements
Dependencies are inferred from the claim text.