FIELD: heating.
SUBSTANCE: invention relates to heat-insulation device comprising at least one panel (100) having two walls (110, 120), separated by main peripheral brace (102) and forming gas-proof chamber (104) with low vacuum, and at least two flexible films(150, 160) located inside said chamber (104), is attached to secondary bracings (140) in intermediate points between two walls (110, 120) and limiting secondary airtight cell (158). Sequential development of potentials of selected polarity between walls (110, 120) and flexible films (150, 160) leads to displacement of flexible films (150, 160) between first heat insulation position, in which flexible films (150, 160) are separated from each other and the second position in which films (150, 160) are in contact with each other at least at considerable part of its surface.
EFFECT: higher efficiency of heat-insulating device and its operating reliability.
10 cl, 12 dwg
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