| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation structure preventing radiation heat from a heating element from leaking to outside through a heat insulation material.SOLUTION: A heat insulation structure arranged around a heating element has a plurality of heat insulation materials 193, 194 laminated along a height direction. For one heat insulation material and the other heat insulation material adjacent in the height direction, on a surface, opposite to the other heat insulation material, of the one heat insulation material, a recess 23 is formed, and on a surface, opposite to the one heat insulation material, of the other heat insulation material, a projection 24 corresponding to the recess is formed.SELECTED DRAWING: Figure 2 |
