Heat exchange – With timer – programmer – time delay – or condition responsive... – Control of variable thermal conductivity systems
Patent
1996-09-10
1998-09-29
Chambers, A. Michael
Heat exchange
With timer, programmer, time delay, or condition responsive...
Control of variable thermal conductivity systems
165 96, F28F 2700
Patent
active
058134549
ABSTRACT:
A compact vacuum insulation panel comprising a chamber enclosed by two sheets of metal, glass-like spaces disposed in the chamber between the sidewalls, and a high-grade vacuum in the chamber includes apparatus and methods for enabling and disabling, or turning "on" and "off" the thermal insulating capability of the panel. One type of enabling and disabling apparatus and method includes a metal hydride for releasing hydrogen gas into the chamber in response to heat, and a hydrogen grate between the metal hydride and the chamber for selectively preventing and allowing return of the hydrogen gas to the metal hydride. Another type of enabling and disabling apparatus and method includes a variable emissivity coating on the sheets of metal in which the emissivity is controllably variable by heat or electricity. Still another type of enabling and disabling apparatus and method includes metal-to-metal contact devices that can be actuated to establish or break metal-to-metal heat paths or thermal short circuits between the metal sidewalls.
REFERENCES:
patent: 3167159 (1965-01-01), Bovenkerk
Chambers A. Michael
Varitec Thermal, L.L.C.
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