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State detection device for detecting abnormal operation of a high-frequency magnetron heating apparatus

  • US 7,863,887 B2
  • Filed: 12/26/2006
  • Issued: 01/04/2011
  • Est. Priority Date: 12/26/2005
  • Status: Active Grant
First Claim
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1. A state detection device for detecting an operating state of a high-frequency heating apparatus including a magnetron for generating microwave;

  • comprising;

    an anode current input portion which inputs a detected anode current of the magnetron; and

    a determination portion which reads a corresponding value corresponding to the anode current inputted by the anode current input portion for a plurality of times during a predetermined time period and determines the operating state of the high-frequency heating apparatus based on a plurality of the corresponding values, whereinthe determination portion determines the operating state of the high-frequency heating apparatus based on (1) a threshold value control based on a number of times where the corresponding value larger than a predetermined threshold value is read continuously and/or (2) a changing value detection control based on a changing value per unit time of the corresponding value calculated by the reading of plural times.

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