MICROWAVE TREATMENT DEVICE

摘要

A microwave processing apparatus is provided with an oscillator, a power amplifier, a heating chamber that accommodates an object to be heated, a power feeder which is disposed on a wall surface of the heating chamber, which receives an output transmitted from a microwave generator and which radiatively feeds the microwave into the heating chamber, and a power detector that detects the power reflected from the power feeder to the power amplifier. The microwave processing apparatus determines a plurality of points of heating frequencies by using top several points of minimum point frequencies of the reflected power, and performs frequency hopping heating within a predetermined unit time.

主权项

1. A microwave processing apparatus comprising:
a heating chamber that accommodates an object to be heated; an oscillator that outputs a source signal of a heating frequency; a power amplifier using a semiconductor element that power-amplifies an output of the oscillator; a power feeder that feeds an output of the power amplifier to the heating chamber; a power detector that detects incident power fed from the power amplifier to the power feeder and reflected power reflected from the power feeder to the power amplifier; and a controller that controls an oscillation frequency of the oscillator and the power amplifier, wherein the power feeder is disposed at least on a wall surface defining the heating chamber, and wherein the controller causes the power amplifier to perform a low output operation before start of heating, detects the reflected power detected by the power detector while changing the oscillation frequency of the oscillator in a predetermined frequency range, determines a plurality of points of heating frequencies of the oscillator by using top several points of minimum point frequencies of the detected reflected power, and performs frequency hopping heating within a predetermined unit time for the plurality of heating frequencies.