GAS AND LIQUID MEDIUMS ELECTRIC HEATER Russian patent published in 2017 - IPC H05B3/42 

FIELD: heating.

SUBSTANCE: heater comprises a housing 1. The outer surface of housing 1 is provided with heat insulating material 24, a closed protective housing 25. Within the housing concentrically with clearance to the walls, a spiral node is positioned in the form of two spirals 4 and 5, intended for passing therethrough a heated medium flow and forming two spiral tubular coils 6 connected in parallel with each other. The heater comprises electric heating elements 7, coaxially arranged in said node 6 of coils, the ends of which are provided with current leads 8. Current leads 8 of electric heating elements 7 may be connected to inlet joint box 20, which can be installed at one end of housing 1. Free ends 9 and 10 of spirals and 5 and 5 of coils are respectively connected from ome side of spiral assembly 6 with input medium reservoir 11.

EFFECT: increase operational safety by avoiding direct contact of the heated medium with electric heating elements, while providing sufficient efficiency and uniformity of the medium heating at different delivery flows.

6 cl, 4 dwg