| 摘要 |
<p>A low resistance electric heating system comprising a low resistance electric conducting material being formed into an electric heating element (10) in two flat spiralled sections (10a) and (10b) covering almost all the area to be heated, comprising a low resistance electric conducting material with sufficient resistance to generate heat. The flat spiralled sections (10a) and (10b) of the electric heating element (10) are spirally configured, so that the heat generating current flows in the same direction and not in opposition in each of the flat spiralled sections (10a) and (10b). The centre (10c) of each of the flat spiralled sections (10a) and (10b) of the electric heating element (10) are electrically connected to each other in series. The flat spiralled sections (10a) and (10b) are connected to the controlled power supply (11) at the outer part of the flat spiral (10d), completing the circuit.</p> |
