| 摘要 |
PROBLEM TO BE SOLVED: To make temperature distribution in a heating cabinet even. SOLUTION: A heating path 44 and air ducts 46, 46 at the front and back are placed separately inside a duct 32 equipped on an inner wall 28. The heating path 44 and each air duct 46 are linked mutually at the lower part of the duct. A cord heater 50 is placed at a place, where the heating duct 44 corresponds, on the back of a heater panel 34 of the duct 32. A lower air outlet 52 which links the draft air ducts 46 and a heating cabinet 20 is formed at a place which corresponds to a lower end area of each draft air duct of the heater panel 34. Upper air outlets 54, which links the air ducts 46 and the heating cabinet 20, is placed at a plurality of places separating an upper part, which corresponds to each of the air ducts 46 of the heater panel 34, vertically. Air heated by the cord heater 50, while descending through the heating duct 44, blows into the heating cabinet 20 out of each outlet 52, 54 during the process of ascending through each air duct 46.
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