| 摘要 |
A low resistance electric heating system comprising a low resistance electric conducting material being formed into an electric heating element 10 in two flat spiraled 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 spiraled 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 spiraled sections 10a and 10b. The centre 10c of each of the flat spiraled sections 10a and 10b of the electric heating element 10 are electrically connected to each other in series. The flat spiraled sections 10a and 10b are connected to the controlled power supply 11 at the outer part of the flat spiral 10d, completing the circuit. |
