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US 6,375,292 B2Granted
Full vacuum heat insulation box body and method for producing and disassembling the same
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorYoshio Nishimoto
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Abstract
A heat insulation box body includes inner and outer boxes forming a shell of the heat insulation box body and triangular structural materials inserted in the shell held by close-contact by means of a vacuum. Further, at the time of disassembling the heat insulation box body after scrapping, a shell surface is cut and air is introduced into the inside of the shell to return the state of the shell to an atmospheric pressure state and then respective members are separated from each other.
Claims4
A method for producing a vacuum heat insulation box body, comprising the steps of:
- integrating an inner box and an outer box into a shell which is opened in an open bottom surface of said outer box;
- inserting a first structural material having continuous pores and a triangular section into a space formed between the inner and outer boxes first shell through the opening of said first shell, by inserting a bottom side portion of said first structural material first;
- inserting a second structural material having continuous pores and a triangular section into said space through said opening of said first shell by inserting a vertex portion of said second structural material first to thereby fill said space of said first shell;
- blocking the opening of said first shell with a third structural material having continuous pores and a shape of a flat plate;
- enclosing said third structural material with a plate member to seal the joint portion between said plate member and said first shell to thereby fully close said shell;
- and evacuating said second shell.
3 more elements
Dependencies are inferred from the claim text.