Air circulation and exhaust control system for commercial ovens

An air circulation and exhaust control system as in claim 8 further comprising:

• means for generating a signal indicative of the combined rate of flow of combustion air and gaseous fuel into the burner means;
• discharge port means for directing exhaust gases out of the oven interior;
• exhaust blower means for controlling the rate of flow of exhaust gases out of the interior through the discharge port means;
• and
• means for operating the exhaust blower means to withdraw exhaust gases from the oven interior through the discharge port at a rate proportional to the rate of flow of combustion air and gaseous fuel into the burner means.

An air circulation and exhaust control system for an oven comprising:

• means forming an oven enclosure defining an oven interior;
• conveyor means including relatively elongated side portions and circular end portions for transporting food products through the oven interior along a predetermined path;
• burner means situated within the oven adjacent at least one of the elongated sides for receiving combustion air and gaseous fuel and for burning the combustion air and the gaseous fuel to heat the oven interior;
• an inlet aperture situated within the oven interior and superimposed above the burner means for receiving heated gases generated by operation of the burner means;
• at least one discharge tube having an outlet aperture located adjacent at least one of the circular end portions of the conveyor path situated remote from the side portions thereof for effective heating of the food products on the conveyor paths;
• and
• circulation means coupling said inlet aperture and said discharge tube for causing a flow of heated gases from the inlet aperture near the elongated side to the discharge tube near the circular end portion.