| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material which can be provided in an inside of a storage at a turning portion of a heat radiation pipe, when a groove portion for arrangement of the heat radiation pipe is provided linearly along the vertical direction and the heat radiation pipe is provided meandering vertically.SOLUTION: A first groove portion 104 and a second groove portion 105 provided on a surface of the vacuum heat insulation material 103 are crossed, and the grooves are provided in ends in the vertical and the horizontal direction. The second groove portion 105 is groove-shaped by roll press and is provided not adjacent to a thermal weld portion 100. |
