Electrical heating element for gases - has heating wire wound around apertured carrier across gas stream

摘要

The electrical heating element for a gas stream, has a heating wire (1) which is wound around an insulating carrier (2). The latter is positioned across the pipe along which the gas flows, so that the gas flows over the surface of the carrier (2). The turns of the heating wire (1) around the carrier (2) have a cross-section in the form of a flat oval with the carrier (2) lying along the longer dia. of the oval. The radius of curvature of the wire turns (7) is greater along both longitudinal edges (4, 4') of the carrier (2). Each heating element may comprise two separate parts, with their wire turns defining different shaped ovals and positioned one after the other in the direction of the gas flow.