Vacuum insulated panel and method of forming a vacuum insulated panel
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United States of America Patent
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Oct 12, 1993
Grant Date -
N/A
app pub date -
Sep 24, 1990
filing date -
Sep 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vacuum insulated panel having high thermal insulating value is described together with a method of making such a panel. The panel is formed of peripherally welded metallic wall members which define a cavity within which a solid compressed block of particulate material is disposed. The particulate material, preferably an activated carbon black, a silica gel or a combination thereof, serves as a barrier to radiant thermal transmission through the panel, acts as a getter to maintain the vacuum in the cavity, and, with proper density, supports the walls of the panel against collapse when the cavity is evacuated. In one embodiment of the invention, the vacuum insulated panel is covered on one side with a polyurethane foam insulating material.
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