TUBE ELECTRIC HEATER Russian patent published in 1999 - IPC

FIELD: electrical engineering, in particular, for heating water in house heating system. SUBSTANCE: device has electric heating spiral coil, which is mounted in quartz jacket. Space between quartz jacket and mechanical jackets is filled with fine-grained filler with high electric strength, but low absorption of heat emitted by spiral coil, for example, this material is colorless periclase powder. In addition it contains grains with high heat absorption factor, for example, grains of graphite powder or soot. EFFECT: increased service life, increased efficiency of heat conduction. 2 cl, 1 dwg