| 摘要 |
A canned product heating apparatus comprises: a non-contact type temperature detecting element 12 which is not in contact with a surface of a can container 2; a directional microphone 13 oriented to a closure 22 of the can container 2; an interrupting circuit which interrupts an electrical supply to a high-frequency induction heating coil 11 based on a signal transmitted from the directional microphone 13. The electrical supply to the high-frequency induction heating coil 11 is stopped by the interrupting circuit in case the directional microphone 13 captures sonic waves within a predetermined range. |
