Vacuum insulation vessels and methods of making same

Details Vacuum insulation vessels and methods of making same Vacuum insulation vessels and methods of making same

B - Operations, Transporting

23

K

B23K 35/24 (2006.01) B23K 1/00 (2006.01) B23K 35/02 (2006.01) B65D 81/38 (2006.01) F17C 3/08 (2006.01)

Patent

CA 2259692

The present invention involves the use of a braze preform (28) for sealing and maintaining a vacuum in an insulation vessel (10). The braze preform (28) comprises particles of a braze material that are at least partially sintered together and at least substantially free of a binder. An assembly is provided for use in a method of manufacturing a vacuum insulation vessel (10). The assembly comprises a metal jacket (12) defining an interior space (20) to be evacuated and one or more evacuation ports (24) formed through a wall of the jacket (12). The evacuation ports (24) provide an opening to the interior space (20). The sintered braze preform (28) is located adjacent to the evacuation ports (24) so as to seal the evacuation ports (24) upon the melting of the brazing material. After the interior space (20) of the jacket (12) is evacuated, the preform (28) can be melted and allowed to solidify and seal the evacuation ports (24). In this way a vacuum can be maintained in the interior space (20).

L'invention concerne l'utilisation d'une préforme de brasure (28) pour la fermeture hermétique d'un récipient d'isolation (10) et le maintien de vide à l'intérieur de celui-ci. La préforme de brasure (28) comporte des particules de matière de brasure qui sont au moins partiellement frittées ensemble et au moins exemptes de liant. Un ensemble à utiliser dans un procédé de fabrication d'un récipient d'isolation par le vide (10) est également prévu. Ledit ensemble comporte une chemise métallique (12) définissant un espace intérieur (20) dans lequel le vide est fait et un ou plusieurs orifices d'évacuation (24) formés dans une paroi de la chemise (12). les orifices d'évacuation (24) forment une ouverture donnant dans l'espace intérieur (20). La préforme de brasure frittée (28) est adjacente aux orifices d'évacuation (24) de sorte qu'elle scelle ces derniers (24) lors de la fusion de la matière de brasure. Une fois le vide fait dans l'espace intérieur (20) de la chemise (12), on peut faire fondre la préforme (28), la laisser se solidifier et sceller les orifices d'évacuation (24). Ainsi, on peut conserver le vide dans l'espace intérieur (20).

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