| 摘要 |
PURPOSE:To maintain the level for a heater and reduce a corrosion development through the improvement of internal ventilation, by arranging such that the top plate of box-shaped body case is supported by a cylindrical body provided inside the case as a reinforcement of top plate and the cylindrical body is utilized as a ventilation guide and a heat insulator. CONSTITUTION:A body case 1 is formed in a box-shaped configuration by a side plate 2, a bottom plate 3 and a top plate 4. The circumferential portion of opening 5 defined through a top plate 4 is supported on the upper end of cylindrical body 15 provided on the bottom plate 3. The opening edge of top plate 4 is thus supported by the cylindrical body 15, and therefore the top plate 4 is less subject to a thermal deformation. Besides, a support plate 11 supported on the opening edge and a heater 10 provided at the support plate 11 can maintain their level. A cooling air is introduced through a vent hole 16 defined through the bottom plate 3 and exhausted from a vent hole 14 defined through a broth receiving plate 9, while being guided by the cylindrical body 15. Said appliance is thus enabled to suppress the rise of temperature therein. |
