Patent ID: 8746230

Claim:
Method for aerating and deaerating an oven ( 1 ), which has at least two oven muffles ( 2 , 3 ) disposed one above the other, feed apertures ( 5 , 6 ) of which are or can be closed respectively by an upper door ( 7 ) and a lower door ( 8 ), comprising the following procedural steps: a) cooling air (L) is drawn off from an outside area surrounding the oven ( 1 ), and b) the drawn-off cooling air (L) is blown at least partially into respective interior spaces ( 9 , 10 ) of the upper and lower doors ( 7 , 8 ) and then blown out into the outside area after flowing through at least a part of the interior spaces ( 9 , 10 ), wherein the drawn-off cooling air (L) is blown into an upper section of the upper door ( 7 ) and flows substantially downward from above through the interior space ( 9 ) of the upper door ( 7 ), further wherein the drawn-off cooling air (L) is blown into the interior space ( 10 ) of the lower door ( 8 ) at a bottom end section thereof and flows substantially upward through the interior space ( 1 ) of the lower door ( 8 ), and the air blown into the interior spaces ( 9 , 10 ) of the upper and lower doors ( 7 , 8 ) is blown out to the outside area after flowing through the interior spaces ( 9 , 10 ) of the upper and lower doors ( 7 , 8 ) in a lower section of the upper door ( 7 ) and an upper section of the lower door ( 8 ) wherein the cooling air (L) is drawn into and through the interior space ( 10 ) of the lower door ( 8 ) solely by a venturi effect of the air blown out of the interior space ( 9 ) of the upper door ( 7 ).