| 摘要 |
PROBLEM TO BE SOLVED: To detect the temperature of a wall surface to which a heat sensitizing part is attached with good response and accurately control temperature in the constitution of the heat sensitizing part for controlling the temperature of a heating chamber. SOLUTION: The periphery of a metal pipe 23 is covered with a metallic cover 26 and the metal pipe 23 is attached to a heating side wall 21 through an attaching plate 27 so that they come into direct contact with each other. Electric field is not applied to the metal pipe 23 so that a self-heat generation due to high frequency current is eliminated. When both high frequency heating and electric heating are emplyed, the deterioration of a finishing state can be more eliminated than that upon heating only by the electric heating. Further, an opening 28 is provided between the metal pipe 23 and the heating side wall 21, so that the influence of heat from an electric heater transmitted directly to a heat sensitive element 24 through the heating side wall 21 is reduced and the temperature of a heating chamber can be more accurately detected.
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