Gas mixer chamber for food oven has corrugated sheet metal cavity wall inner mantle extending from within inlet to outlet

摘要

A food oven has a circulatory heating system with a gas-mixing chamber (1) within a mantle (11) having a gas inlet (112) and a gas outlet for hotter gas. The mixer chamber has an inner cavity wall lining (110) that extends from within the inlet (112, 21), over the entire inner mantle to within the outlet pipe. The inlet pipe lining diameter is at least 0.5 that of the surrounding inlet pipe. Along the distance between the inlet and the outlet, the effective cross-sectional area of the area embraced by the mantle lining varies between 0.8 and 1.5 times that of the gas inlet pipe (21). The cavity wall lining gas leading edge commences from within the gas inlet pipe (21) and is a concentric corrugated metal pipe with radial locating ribs.