Pipeline heated by a diagonal feeding, band-form, electrical heat-generating apparatus

摘要

A band-form, electrically heat-generating apparatus having two parallel electrodes and resistance elements intervened therebetween over the entire length of the electrodes, and connected to both the electrodes in parallel and individual feeding points on each of the respective electrodes, which apparatus is characterized in that the feeding point to one of the electrodes and that to another of the electrodes are located at diagonal positions relative to the parallelogram formed by the two electrodes and the outermost two of the resistance elements to form a heat-generating unit. A plurality of such a heat-generating apparatus may be formed by connecting such a heat-generating unit in series to form a heat-generating apparatus; and the electrically heat-generating apparatus may further be provided with a circuit for detecting or protecting voltage abnormalities. With the above apparatus, a more uniform heat generation is possible as compared with conventional apparatus.