INDUCTION HEATING DEVICE

• Main Authors: NISHIKORI NOBUHARU, YOSHIDA TARO
• Format: Patent
• Language: English; Japanese
• Published: 20.06.2023
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

To enable the fire power of each object to be heated to be adjusted to desired magnitude even while eliminating noise to be generated in the case of simultaneously heating a plurality of objects to be heated.SOLUTION: An induction heating device includes at least two heating coils 1 for inductively heating an object to be heated, an inverter device 2 provided corresponding to the respective heating coils 1 to supply power to the corresponding heating coils, and control equipment 3 for controlling the inverter device 2. The control equipment 3 compares drive frequencies being frequencies of power to be supplied to at least two heating coils 1, changes the drive frequency of a higher frequency side coil 1 having a high drive frequency into a drive frequency of a lower frequency side coil 1 having a low drive frequency, controls the inverter device 2 corresponding to the lower frequency side coil 1 with a prescribed first control mode, and controls the inverter device 2 corresponding to the higher frequency side coil 1 with a second control mode different from the first control mode.SELECTED DRAWING: Figure 2 【課題】複数の被加熱物を同時に加熱する場合に生じるノイズを解消しつつも、それぞれの被加熱物の火力を所望の大きさに調整できるようにする。【解決手段】被加熱物を誘導加熱する少なくとも２つの加熱コイル１と、加熱コイル１それぞれに対応して設けられ、その対応する加熱コイルに電力を供給するインバータ装置２と、インバータ装置２を制御する制御機器３とを備え、制御機器３が、少なくとも２つの加熱コイル１に供給される電力の周波数である駆動周波数を比較し、駆動周波数の高い高周波数側コイル１の駆動周波数を、駆動周波数の低い低周波数側コイル１の駆動周波数に変更するとともに、低周波数側コイル１に対応するインバータ装置２を所定の第１制御態様により制御し、高周波数側コイル１に対応するインバータ装置２を第１制御態様とは異なる第２制御態様により制御するようにした。【選択図】図２