| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve a problem of causing a change in the frequency at which a reflective wave gets minimum, according to a change during heating of food. <P>SOLUTION: This microwave heating apparatus includes microwave generating sections 3a-3d having output parts 2a-2d connected to a plurality of semiconductor oscillating parts 1a-1d; reflected wave monitoring sections 6a-6d always monitoring a heating chamber 5 and a reflected wave level; a control section 4 receiving the signals and controlling output; and a threshold 10 for not resulting in breakage. When the respective values of signals of the reflected wave monitoring sections 6a-6d exceed the threshold 10, a semiconductor is prevented from breakage by performing negative feedback control so that the output of the semiconductor oscillating parts 1a-1d are the threshold 10 or less. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
