Patent ID: 7210308

Claim:
A refrigerator comprising: a heat insulating box including an inner box having an opening, an outer box, a lid for closing said opening, at least one vacuum heat insulator disposed in a space between said inner box and said outer box at at least one of a back wall, a side wall and a top wall of the refrigerator, said at least one vacuum heat insulator comprising a core disposed in an enveloping member, and foamed resin filled in said space between said inner box and said outer box, said foamed resin employing a flammable substance as a foaming agent; and a cooling machine for cooling an inner space of said heat insulating box, said cooling machine employing a flammable substance as a refrigerant, wherein said core is made of a fibrous laminate of at least two sheets of inorganic fibers, with opposing faces of said sheets being in contact with each other, said inorganic fibers containing SiO 2 as a main composition of said inorganic fibers, and further containing Al 2 O 3 , CaO and MgO as material compositions, and wherein said enveloping member is made of a laminated film.