Refrigerator
AssigneeMatsushita Refrigeration Company
InventorsYasuaki Tanimoto, Chie Hirai
Life of this patent
Estimating the term…
Abstract
By using a core made of laminated sheets of inorganic fibers having a particular shape and composition as part of a vacuum heat insulator for a heat insulation box, a heat insulation box excellent in long-term heat insulating properties and productivity can be provided. The vacuum heat insulator can be shaped easily. Therefore, a vacuum heat insulator suitable for a required heat insulation portion can be produced easily and applied to a heat insulation box. This property can increase coverage of the vacuum heat insulator on the heat insulation box, thus improving heat insulating properties of the heat insulation box. This can improve heat insulating properties and productivity of a refrigerator, thermal storage box, cold storage box, or vending machine, and contribute to energy savings.
Claims24
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 SiO2 as a main composition of said inorganic fibers, and further containing Al2O3, CaO and MgO as material compositions, and
- wherein said enveloping member is made of a laminated film.
Dependencies are inferred from the claim text.