| 摘要 |
A solar heat collector is configured in such a manner that the bottom plate (1a) and the side plates (1b) of a case (1), which has an open upper face, consist of a vacuum insulating material (5) which is formed by covering a core material (6) with an outer skin (7) and creating vacuum in the space formed by the outer skin. The outer skin (7) is formed by welding the peripheral edges of two metallic plates disposed so as to face each other across the core material (6). Linear grooves (21c) are formed in the metallic plates, and the two metallic plates are disposed across the core material (6) with the protrusions of the linear grooves facing each other. |
