ELECTRIC HEATING DEVICE OF TRANSFORMER TYPE Russian patent published in 2010 - IPC H05B6/00 

FIELD: electricity.

SUBSTANCE: device comprises closed magnetic conductor covered with induction primary winding and secondary short-circuited winding, which is formed by combination of electrically and mechanically connected elements with the help of fixing device in the form of hollow pipe. Between external surface of active part of fixing device and internal circuit of secondary winding there are rings installed and made of the same material as the elements of secondary winding, and process holes are arranged in them, through which heated medium circulates relative to internal surface of secondary winding.

EFFECT: increased active area of thermal surface of secondary winding.

1 dwg