Circular film heater and porcelain enamel cooktop

摘要

A range cook top is provided with circular heating zones having a layer of resistive thin film thereon. Slots in the cook top separate the heating zones from the surrounding areas of the cook top. Tongues of cook top material interrupt the slots and support the heating zones. The slots have beveled or stepped edges and beveled or stepped plastic inserts fill the slots to provide a smooth cook top. Sealer also fills the slots. The resistive layer in the heating zone is divided into arcuate segments by insulating partitions. Power supply bus bars are disposed around the outside edge of the resistive layer. A common bus bar interconnects the segments at the inner edges. A dual heater has separately controlled inner and outer resistive layers.