Abstract: The invention relates to a thermal insulation device comprising at least one panel (100) defining a gas-tight chamber (104) containing at least two flexible films (150, 160) suitable for being selectively switched between two states: one of thermal conduction wherein said flexible films (150, 160) are at least partially in mutual contact, and the other of thermal insulation wherein the flexible films (150, 160) are separated, under the influence of pressure variations in said gas-tight chamber (104), applied by fluid control means (170), characterized in that, in the thermal insulation state, the distance separating the flexible films (150, 160) is shorter than the average free path of the gas molecules in the space (158) defined between said flexible films (150, 160). The invention also relates to a method.

Abstract: The invention relates to a thermal insulation device comprising at least one panel (100) provided with two walls (110, 120) separated by a peripheral main spacer (102) in order to define a gas-tight chamber (104) containing a partial vacuum, and at least two flexible films (150, 160) locally attached to secondary spacers (140) at intermediate points between the two walls (110, 120) and defining tight secondary compartments (158) between each other. As a result of applying successive potentials of selected polarity between the walls (110, 120) and the flexible films (150, 160), the flexible films (150, 160) are moved between a first thermal insulation position wherein the films (150, 160) are separated from each other and a second position wherein the films (150, 160) are in mutual contact at least on a substantial part of the surface thereof.

Abstract: The invention relates to a thermal insulation device comprising at least one panel (100) defining a gas-tight chamber (104) containing at least two flexible films (150, 160) suitable for being selectively switched between two states: one of thermal conduction wherein said flexible films (150, 160) are at least partially in mutual contact, and the other of thermal insulation wherein the flexible films (150, 160) are separated, under the influence of pressure variations in said gas-tight chamber (104), applied by fluid control means (170), characterised in that, in the thermal insulation state, the distance separating the flexible films (150, 160) is shorter than the average free path of the gas molecules in the space (158) defined between said flexible films (150, 160). The invention also relates to a method.

Abstract: The invention relates to a thermal insulation device comprising at least one panel (100) provided with two walls (110, 120) separated by a peripheral main spacer (102) in order to define a gas-tight chamber (104) containing a partial vacuum, and at least two flexible films (150, 160) locally attached to secondary spacers (140) at intermediate points between the two walls (110, 120) and defining tight secondary compartments (158) between each other. As a result of applying successive potentials of selected polarity between the walls (110, 120) and the flexible films (150, 160), the flexible films (150, 160) are moved between a first thermal insulation position wherein the films (150, 160) are separated from each other and a second position wherein the films (150, 160) are in mutual contact at least on a substantial part of the surface thereof.