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MICROWAVE HEATING DEVICE AND MICROWAVE HEATING CONTROL METHOD

  • US 20120111856A1
  • Filed: 06/28/2010
  • Published: 05/10/2012
  • Est. Priority Date: 07/10/2009
  • Status: Active Grant
First Claim
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1. A microwave heating device comprising:

  • a microwave generating portion having a variable frequency function;

    a heating chamber for housing an object to be heated;

    plural feeding portions for supplying, to the heating chamber, a microwave generated from the microwave generating portion;

    an electric-power detection portion for detecting an amount of reflected microwaves which are reflected toward the microwave generating portion from the heating chamber through the feeding portions; and

    a control portion for controlling an operation of the microwave generating portion on the basis of a detection signal detected by the electric-power detection portion;

    whereinthe control portion is configured to perform control for operating the microwave generating portion at a heating frequency for heating the object to be heated for supplying the microwave electric power from the feeding potions to the heating chamber, estimate a heating state of the object to be heated on the basis of a per-unit-time increase/decrease change state in a detected level of a detection signal detected by the electric-power detection portion, and control the heating frequency and the microwave electric power supplied from the feeding portions to the heating chamber.

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