| 摘要 |
An indirectly heated, gas-fired tunnel oven has upper and lower heating sections (102, 104) with upper and lower heating means (116) defining a baking chamber between them. Each heating section (102, 104) has an associated gas-fired burner (106) arranged to provide heated gases to each heating means (116) through ducts (112). At least one section (102, 104) comprises a fan (120) arranged downstream at least one heating means (116), which fan is arranged to drive a flow of heated gases through at least one section (102, 104) and a duct (122) arranged to recirculate gases from the fan to a location upstream the heating means (116). |
