Patent ID: 6539934
Filing Date: 2003-04-01
Classification: A21B

Abstract:
A multiconveyor convection oven, comprisinga baking chamber at least two spaced-apart conveyors mounted transversally one over the other in the baking chamber; a heating chamber behind the baking chamber, the heating chamber comprising an air heater to heat air circulating in the heating chamber; a convection system for providing a circulation of the air from the baking chamber to the heating chamber and back to the baking chamber to cook the food, the convection system comprising: at least one air return passage having an air inlet in fluid communication with the baking chamber and an air outlet in fluid communication with the heating chamber; a blower housing extending vertically outside the heating chamber on a side thereof; at least two centrifugal blower chambers, one for each conveyor, mounted one over the other within the blower housing, each centrifugal blower chamber having: an air inlet in fluid communication with the heating chamber for drawing air from the baking chamber via the at least one air return chamber and the heating chamber; and an air outlet for throwing back heated air at high pressure; at least two plenum chambers, one downstream from each centrifugal blower chamber, disposed one over the other in between the baking chamber and the heating chamber, each plenum chamber having: an air inlet in fluid communication with the air outlet of a corresponding one of said centrifugal blower chambers for receiving said heated air at high pressure; and at least one air outlet for throwing back said heated air; ducting means disposed within the baking chamber for conveying the heated air at high pressure exiting from said at least one outlet of the plenum chamber and dispensing the same in the baking chamber to cook food.