| 摘要 |
PROBLEM TO BE SOLVED: To reduce the consumption of a foamed heat insulation material when using the formed heat insulation material and a vacuum heat insulation panel in combination.SOLUTION: A heat insulation box includes an external box 2 which has a left side plate 50, a right side plate 57, a top plate, a bottom plate, and a back plate 60; an internal box 3 which is arranged in the external box, and has a left side plate, a right side plate, a top plate, a bottom plate, and a back plate corresponding to the right side plate, top plate, bottom plate, and back plate of the external box; a vacuum heat insulation panel 70 which is arranged between the back plate of the internal box and the back plate of the external box to constitute a back heat insulation wall; and foamed heat insulation materials 71a, 71b, 71e, 71f, and 71i which are charged between the internal box and external box to constitute side heat insulation walls, the back heat insulation wall being set to be larger in area in the absence of the foamed heat insulation materials on the surface of the vacuum heat insulation panel corresponding to the internal box and on the reverse surface corresponding to the external box, than the side heat insulation walls. |
