The utility model relates to devices that retain accumulated heat energy and can be used in various branches of technology, in particular, to maintain the thermal mode of an internal combustion engine after it stops and facilitate subsequent engine start, as well as to insulate the engine compartment and the engine underhood insulation) contains a voluminous enclosed cover made of refractory polyester fabric, between the layers of fabric is a cellular cushion of heat-resistant silicone minutes rubber whose cells are filled with paraffin through a large heat capacity and a large specific heat of melting (crystallization) which ensured the temperature range from -60 ° C to + 300 ° C, the mesh bag with sewn cushion metallized thread.
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