Heating apparatus having a sensor for terminating operating.

摘要

A heating apparatus is described wherein a foodstuff is heated in a chamber which is ventilated by a fan through an exhaust duct. The duct has a sufficient length of airflow passage to produce a substantially laminar flow therein. An opening is formed in a position intermediate the length of the duct, facing in a direction substantially perpendicular to the direction of the laminar airflow. The outside of the opening is closed by an enclosure to allow vaporized substance emitted by the foodstuff to diffuse from the duct through the opening into the enclosure. A sensor is located in the enclosure to detect the diffusing substance and develops a signal indicating a condition of the foodstuff.