HIGH-FREQUENCY DIELECTRIC HEATING DEVICE
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United States of America Patent
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Dec 18, 2017
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Jul 3, 2015
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Abstract
Provided is a high-frequency dielectric heating device in which fine impedance adjustment can be achieved easily and with high precision while reducing a device cost and simplifying a device structure. A high-frequency dielectric heating device (10) includes a high-frequency power supply (20), a pair of electrodes (30) disposed opposite each other, reflected power detector 60 connected between the electrodes (30) and the high-frequency power supply (20) and detects reflected power generated when a heating subject is heated, and an impedance matching device (40) that adjusts the reflected power, wherein the matching device (40) includes a capacitor (C1) connected in parallel to the high-frequency power supply (20), and at least one of a capacitor (C2) and a coil (L) connected in series to the electrodes (30), at least a reactance of the capacitor or the coil being adjustable, and the high-frequency power supply (20) is configured to have a variable frequency.
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