JP4494316B2

JP4494316B2 - Induction heating cooker

Info

Publication number: JP4494316B2
Application number: JP2005260668A
Authority: JP
Inventors: 広康私市; 浪平鈴木; 義博小佐野; 治夫櫻井; みゆき竹下; 潤文屋
Original assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Priority date: 2005-09-08
Filing date: 2005-09-08
Publication date: 2010-06-30
Anticipated expiration: 2025-09-08
Also published as: JP2007073409A

Description

本発明は、複数の加熱コイルを有する誘導加熱調理器、特に加熱コイルへの入力電力を制御する誘導加熱調理器に関するものである。 The present invention relates to an induction cooking device having a plurality of heating coils, and more particularly to an induction heating cooking device that controls input power to the heating coil.

従来の誘導加熱調理器は、単一の整流回路に複数のインバータを設け、この複数のインバータの位相をずらして個々の加熱コイルを駆動している（例えば、特許文献１参照）。
特開昭５９−１９１２８８号公報（第３頁、第１図） In the conventional induction heating cooker, a plurality of inverters are provided in a single rectifier circuit, and the phases of the plurality of inverters are shifted to drive individual heating coils (see, for example, Patent Document 1).
JP 59-191288 (page 3, FIG. 1)

しかしながら、前述した従来の誘導加熱調理器では、複数のインバータの位相をずらすだけでは全電力を所定以内の電力で制御できないため、住宅内で使用した場合、過負荷によりブレーカが動作してしまうことがあった。また、単一の整流回路部は、複数のインバータを動作させた場合の最大電力に対応する必要が有るので、整流回路部の個々の部品の電流容量を大きくする必要があり、このため、サイズが大きく、コスト高となっていた。 However, in the above-described conventional induction heating cooker, the total power cannot be controlled with the power within the predetermined range by simply shifting the phases of the plurality of inverters. Therefore, when used in a house, the breaker may operate due to overload. was there. In addition, since a single rectifier circuit unit needs to support the maximum power when a plurality of inverters are operated, it is necessary to increase the current capacity of individual components of the rectifier circuit unit. Was large and costly.

本発明は、前記のような課題を解決するためになされたもので、ブレーカが動作しない電力の範囲内で加熱コイルを制御し、回路の共通部品の小型化と低コスト化を可能にする誘導加熱調理器を提供することを目的とする。 The present invention has been made to solve the above-described problems, and controls the heating coil within the range of electric power where the breaker does not operate, and enables induction of miniaturization and cost reduction of common parts of the circuit. An object is to provide a cooking device.

本発明に係る誘導加熱調理器は、商用電源の交流を直流に変換する第１の直流電源回路と、商用電源の交流を直流に変換する第２の直流電源回路と、加熱コイルを有し、高周波でスイッチングして第１の直流電源回路の出力を高周波電力に変換し、加熱コイルに供給する複数の誘導加熱部と、加熱コイルを有し、高周波でスイッチングして第２の直流電源回路の出力を高周波電力に変換し、加熱コイルに供給する単一の誘導加熱部と、操作部により設定された電力が得られるように各誘導加熱部を制御する制御部とを備え、制御部は、各誘導加熱部を制御する際、複数の誘導加熱部の合計電力と単一の誘導加熱部の電力との合計が第１の電力閾値以下になるように、かつ、複数の誘導加熱部の合計電力が第２の電力閾値以下になるようにする。 An induction heating cooker according to the present invention includes a first DC power circuit that converts AC of a commercial power source into DC, a second DC power circuit that converts AC of the commercial power source into DC, and a heating coil. A high-frequency switching circuit converts the output of the first DC power supply circuit into a high-frequency power and supplies the heating coil with a plurality of induction heating units and a heating coil. A single induction heating unit that converts output to high frequency power and supplies the heating coil, and a control unit that controls each induction heating unit so as to obtain power set by the operation unit, the control unit, When controlling each induction heating unit, the total of the plurality of induction heating units is such that the sum of the total power of the plurality of induction heating units and the power of the single induction heating unit is equal to or less than the first power threshold. Ensure that the power is below the second power threshold

本発明においては、複数の誘導加熱部及び単一の誘導加熱部を制御する際、複数の誘導加熱部の合計電力と単一の誘導加熱部の電力との合計が第１の電力閾値以下になるようにしたので、ブレーカが過負荷により動作して商用電源を遮断するということがなくなり、また、第１の直流電源回路を共有する複数の誘導加熱部の合計電力が第２の電力閾値以下になるようにしたので、共有している第１の直流電源回路に容量の小さい部品を使用することが可能になり、このため、低コストで小型の誘導加熱調理器を提供できる。 In the present invention, when controlling the plurality of induction heating units and the single induction heating unit, the sum of the total power of the plurality of induction heating units and the power of the single induction heating unit is less than or equal to the first power threshold value. As a result, the breaker does not operate due to overload and shuts off the commercial power supply, and the total power of the plurality of induction heating units sharing the first DC power supply circuit is equal to or lower than the second power threshold value. Therefore, it is possible to use a small-capacity component for the shared first DC power supply circuit. Therefore, a small induction heating cooker can be provided at low cost.

実施の形態１．
図１は本発明の実施の形態１を示す誘導加熱調理器の回路図である。
図１に示す実施の形態１の誘導加熱調理器１３は、ノイズフィルタ２と、第１の直流電源回路を構成する整流回路３及びコンデンサ４を共有する複数の誘導加熱部５，１０と、ノイズフィルタ６と、第２の直流電源回路を構成する整流回路７及びコンデンサ８を単独で用いる単一の誘導加熱部９と、制御部の制御回路１１と、電源スイッチ１２ａ、誘導加熱部５の電力（火力）を調節するための電力調節ダイヤル１２ｂ、誘導加熱部１０の電力を調節するための電力調節ダイヤル１２ｃ及び誘導加熱部９の電力を調節するための電力調節ダイヤル１２ｄを有する操作部１２とを備えている。 Embodiment 1 FIG.
FIG. 1 is a circuit diagram of an induction heating cooker showing Embodiment 1 of the present invention.
The induction heating cooker 13 according to the first embodiment shown in FIG. 1 includes a noise filter 2, a plurality of induction heating units 5 and 10 that share a rectifier circuit 3 and a capacitor 4 that constitute a first DC power supply circuit, and noise. A single induction heating unit 9 that uses the filter 6, the rectifier circuit 7 and the capacitor 8 constituting the second DC power supply circuit alone, the control circuit 11 of the control unit, the power switch 12a, and the power of the induction heating unit 5 An operation unit 12 having a power adjustment dial 12b for adjusting (heating power), a power adjustment dial 12c for adjusting the power of the induction heating unit 10 and a power adjustment dial 12d for adjusting the power of the induction heating unit 9; It has.

誘導加熱部５は、加熱コイル５ｄと、加熱コイル５ｄに直列に接続された共振コンデンサ５ｅ、コンデンサ４に充電された充電エネルギー（入力電力）を高周波電力に変換するためのスイッチング素子５ｂ，５ｃと、入力電流を検出するための検出抵抗５ａと、入力電圧検出回路５ｆとで構成されている。誘導加熱部１０は、誘導加熱部５と同様に、加熱コイル１０ｄと、加熱コイル１０ｄに直列に接続された共振コンデンサ１０ｅと、コンデンサ４に充電された充電エネルギーを高周波電力に変換するためのスイッチング素子１０ｂ，１０ｃと、入力電流を検出するための検出抵抗１０ａと、入力電圧検出回路１０ｆとで構成されている。 The induction heating unit 5 includes a heating coil 5d, a resonance capacitor 5e connected in series to the heating coil 5d, and switching elements 5b and 5c for converting charging energy (input power) charged in the capacitor 4 into high-frequency power. , And a detection resistor 5a for detecting an input current and an input voltage detection circuit 5f. The induction heating unit 10, like the induction heating unit 5, is a switching for converting a heating coil 10 d, a resonant capacitor 10 e connected in series to the heating coil 10 d, and charging energy charged in the capacitor 4 into high frequency power. The circuit includes elements 10b and 10c, a detection resistor 10a for detecting an input current, and an input voltage detection circuit 10f.

誘導加熱部９は、加熱コイル９ｄと、加熱コイル９ｄに直列に接続された共振コンデンサ９ｅ、コンデンサ８に充電された充電エネルギー（入力電力）を高周波電力に変換するためのスイッチング素子９ｂ，９ｃと、入力電流を検出するための検出抵抗９ａと、入力電圧検出回路９ｆとで構成されている。前述した誘導加熱部５と誘導加熱部９の最大入力電力は３ｋＷに設定され、誘導加熱部１０の最大入力電力は２ｋＷに設定されている。 The induction heating unit 9 includes a heating coil 9d, a resonance capacitor 9e connected in series to the heating coil 9d, and switching elements 9b and 9c for converting charging energy (input power) charged in the capacitor 8 into high-frequency power. The detection resistor 9a for detecting the input current and the input voltage detection circuit 9f are included. The maximum input power of the induction heating unit 5 and the induction heating unit 9 described above is set to 3 kW , and the maximum input power of the induction heating unit 10 is set to 2 kW .

制御回路１１は、例えば、６ｋＷの第１の電力閾値と４ｋＷの第２の電力閾値とが設定されており、３台の誘導加熱部５，９，１０の入力電力の合計が第１の電力閾値（６ｋＷ）を超えるとき、その合計が第１の電力閾値の６ｋＷ以下になるように、かつ、第１の直流電源回路側を共有する誘導加熱部５，１０の入力電力の合計が第２の電力閾値（４ｋＷ）以下になるように、３台の誘導加熱部５，９，１０の各スイッチング素子５ｂ，５ｃ・９ｂ，９ｃ・１０ｂ，１０ｃをそれぞれ制御する。 In the control circuit 11, for example, a first power threshold of 6 kW and a second power threshold of 4 kW are set, and the total input power of the three induction heating units 5, 9, and 10 is the first power. when exceeding the threshold value (6 kW), the sum to be less than 6 k W of the first power threshold value, and the sum of the input power of the induction heating unit 5, 10 to share the first DC power supply circuit side The switching elements 5b, 5c, 9b, 9c, 10b, and 10c of the three induction heating units 5, 9, and 10 are controlled so as to be equal to or lower than the second power threshold value (4 kW).

前記のよう構成された実施の形態１の誘導加熱調理器の動作について説明する。まず最初に基本的な動作を説明するために、誘導加熱部５に通電したときの動作を説明する。
操作部１２の電源スイッチ１２ａがオンされた後に、電力調整ダイヤル１２ｂが「大」の方向に回されて電力が設定されると、制御回路１１は、誘導加熱部５のスイッチング素子５ｂ，５ｃを高周波で交互にスイッチングして、コンデンサ４の充電エネルギーを高周波電力に変換し、加熱コイル５ｄに供給する。この加熱コイル５ｄと共振コンデンサ５ｅは直列回路を構成しており、加熱コイル５ｄのインダクタンス値をＬ、抵抗値をＲ、共振コンデンサ５ｅの容量をＣとすると、直列回路のインピーダンスＺは以下の式で表すことができる。
Ｚ＝（（２πｆＬ−１／２πｆＣ）²＋Ｒ²）^1/2
ここで、ｆはスイッチング素子５ｂ，５ｃのスイッチング周波数を表している。 Operation | movement of the induction heating cooking appliance of Embodiment 1 comprised as mentioned above is demonstrated. First, in order to explain the basic operation, the operation when the induction heating unit 5 is energized will be described.
After the power switch 12 a of the operation unit 12 is turned on, when the power adjustment dial 12 b is turned in the “large” direction to set the power, the control circuit 11 switches the switching elements 5 b and 5 c of the induction heating unit 5. By alternately switching at high frequency, the charging energy of the capacitor 4 is converted to high frequency power and supplied to the heating coil 5d. The heating coil 5d and the resonance capacitor 5e constitute a series circuit. When the inductance value of the heating coil 5d is L, the resistance value is R, and the capacitance of the resonance capacitor 5e is C, the impedance Z of the series circuit is expressed by the following equation. Can be expressed as
Z = ((2πfL−1 / 2πfC) ² + R ² ) ^1/2
Here, f represents the switching frequency of the switching elements 5b and 5c.

このインピーダンスＺは、（２πｆＬ−１／２πｆＣ）＝０となる周波数ｆで最小となり、加熱コイル５ｄに流れる電流が最も大きく入力電力が最大となる。周波数を高くすると、インピーダンスＺは増加し、加熱コイル５ｄに流れる電流は減少し、入力電力も減少する。つまり、電力調整ダイヤル１２ｂを「大」の方向に回した場合、スイッチング素子５ｄ，５ｃのスイッチング周波数を下げて、加熱コイル５ｄの入力電力を大きくし、電力調整ダイヤル１２ｂを「小」の方向に回した場合、スイッチング素子５ｄ，５ｃのスイッチング周波数を上げて、加熱コイル５ｄの入力電力を小さくする。 The impedance Z is minimized at a frequency f where (2πfL−1 / 2πfC) = 0, and the current flowing through the heating coil 5d is the largest and the input power is maximized. When the frequency is increased, the impedance Z increases, the current flowing through the heating coil 5d decreases, and the input power also decreases. That is, when the power adjustment dial 12b is turned in the “large” direction, the switching frequency of the switching elements 5d and 5c is lowered to increase the input power of the heating coil 5d, and the power adjustment dial 12b is moved in the “small” direction. When turned, the switching frequency of the switching elements 5d and 5c is increased to reduce the input power of the heating coil 5d.

制御回路１１は、誘導加熱部５のスイッチング素子５ｂ，５ｃの制御に入ったときに、入力電流検出回路５ａにより検出された入力電流と入力電圧検出回路５ｆによって検出された入力電圧とから誘導加熱部５の入力電力を算出し、この入力電力が電力調整ダイヤル１２ｂの設定電力になるようにスイッチング素子５ｂ，５ｃの周波数を制御する。 The control circuit 11 performs induction heating from the input current detected by the input current detection circuit 5a and the input voltage detected by the input voltage detection circuit 5f when the control of the switching elements 5b and 5c of the induction heating unit 5 is started. The input power of the unit 5 is calculated, and the frequencies of the switching elements 5b and 5c are controlled so that this input power becomes the set power of the power adjustment dial 12b.

次に、誘導加熱部５により調理が行われているときに、操作部１２の電力調整ダイヤル１２ｃ，１２ｄによって電力が設定されたときの動作を説明する。その電力調整ダイヤル１２ｃ，１２ｄが「大」の方向に回されてそれぞれ電力が設定されると、制御回路１１は、それぞれの設定電力を読み取り、先に設定された電力調整ダイヤル１２ｂの設定による入力電力との合計を算出して、その合計が第１の電力閾値（６ｋＷ）を超えているかどうか、また、先に設定された電力調整ダイヤル１２ｂの設定による入力電力と電力調整ダイヤル１２ｃの設定電力の合計が第２の電力閾値（４ｋＷ）を超えているかどうかを判定する。３台の誘導加熱部５，９，１０の合計電力が第１の電力閾値以下で、かつ、第１の直流電源回路側の誘導加熱部５，１０の合計電力が第２の電力閾値以下のときは、誘導加熱部１０の入力電力が電力調整ダイヤル１２ｃの設定電力になるようにスイッチング素子１０ｂ，１０ｃを制御すると共に、誘導加熱部９の入力電力が電力調整ダイヤル１２ｄの設定電力になるようにスイッチング素子９ｂ，９ｃを制御する。 Next, an operation when power is set by the power adjustment dials 12c and 12d of the operation unit 12 when cooking is performed by the induction heating unit 5 will be described. When the power adjustment dials 12c and 12d are turned in the “Large” direction to set the power, the control circuit 11 reads the set power and inputs the power adjustment dial 12b set in advance. The total power is calculated, whether the total exceeds the first power threshold (6 kW), and the input power set by the power adjustment dial 12b set earlier and the set power of the power adjustment dial 12c It is determined whether or not the sum of the two exceeds the second power threshold (4 kW). The total power of the three induction heating units 5, 9, and 10 is less than or equal to the first power threshold, and the total power of the induction heating units 5 and 10 on the first DC power supply circuit side is less than or equal to the second power threshold. When the switching elements 10b and 10c are controlled so that the input power of the induction heating unit 10 becomes the set power of the power adjustment dial 12c, the input power of the induction heating unit 9 becomes the set power of the power adjustment dial 12d. The switching elements 9b and 9c are controlled.

また、電力調整ダイヤル１２ｂ，１２ｃの設定電力の合計、つまり、誘導加熱部５，１０の合計電力が第２の電力閾値と同一で、３台の誘導加熱部５，９，１０の合計電力が第１の電力閾値を超えているときは、第１の電力閾値以下になるように誘導加熱部５の設定電力を下げる制御に入り、また、３台の誘導加熱部５，９，１０の合計電力が第１の電力閾値以下で、誘導加熱部５，１０の合計電力が第２の電力閾値を超えているときは、第２の電力閾値以下になるように誘導加熱部５の入力電力及び誘導加熱部１０の設定電力を下げる制御に入る。 Further, the total set power of the power adjustment dials 12b and 12c, that is, the total power of the induction heating units 5 and 10 is the same as the second power threshold, and the total power of the three induction heating units 5, 9, and 10 is When the first power threshold value is exceeded, control is performed to lower the set power of the induction heating unit 5 so as to be equal to or lower than the first power threshold value, and the total of the three induction heating units 5, 9, 10 is entered. When the power is equal to or lower than the first power threshold and the total power of the induction heating units 5 and 10 exceeds the second power threshold, the input power of the induction heating unit 5 and the power to be equal to or lower than the second power threshold Control for lowering the set power of the induction heating unit 10 is started.

以上のように実施の形態１によれば、電力調整ダイヤル１２ｂ，１２ｃ，１２ｄの入力電力の合計が第１の電力閾値（６ｋＷ）を超えたとき、誘導加熱部５，９，１０の入力電力の合計がその６ｋＷ以下になるように制御するので、ブレーカが過負荷で動作して商用電源が遮断されるということがなくなり、また、第１の直流電源回路側を共用する誘導加熱部５、１０の入力電力の合計が第２の電力閾値以下になるように制御するので、第１の直流電源回路を構成する整流回路３のダイオードとコンデンサ４を４ｋＷの電力容量で設計すればよく、このため、前述した従来の誘導加熱調理器と比べ、低コストで小型化が可能な誘導加熱調理器１３を提供できる。 As described above, according to the first embodiment, when the total input power of the power adjustment dials 12b, 12c, and 12d exceeds the first power threshold (6 kW), the input power of the induction heating units 5, 9, and 10 So that the circuit breaker operates with an overload and the commercial power supply is not shut off, and the induction heating unit 5 sharing the first DC power supply circuit side, Since the total input power of 10 is controlled to be equal to or lower than the second power threshold, the diode and the capacitor 4 of the rectifier circuit 3 constituting the first DC power supply circuit may be designed with a power capacity of 4 kW. Therefore, it is possible to provide the induction heating cooker 13 that can be downsized at a lower cost than the conventional induction heating cooker described above.

実施の形態２．
実施の形態２における誘導加熱調理器の構成は、図１で説明した実施の形態１とほぼ同様であるため、図１を用いて説明する。
実施の形態２の誘導加熱調理器１３は、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、単一の誘導加熱部９の入力電力が電力調整ダイヤル１２ｄにて電力アップされた場合、その設定電力が誘導加熱部９の入力電力となるように増加させると共に、第２の電力閾値を（第１の電力閾値−誘導加熱部９の設定電力）の値に変更し、誘導加熱部５，１０の入力電力の合計が、変更した第２の電力閾値以下になるようにしたものである。 Embodiment 2. FIG.
The configuration of the induction heating cooker according to the second embodiment is substantially the same as that of the first embodiment described with reference to FIG. 1, and will be described with reference to FIG.
In the induction heating cooker 13 of the second embodiment, the total input power of the induction heating units 5 and 10 is the second power threshold, and the total of the two input powers and the input power of the induction heating unit 9 is When the input power of the single induction heating unit 9 is increased by the power adjustment dial 12d when the power threshold is the first power threshold, the set power is increased to become the input power of the induction heating unit 9. At the same time, the second power threshold is changed to a value of (first power threshold−set power of induction heating unit 9), and the total input power of induction heating units 5 and 10 is less than or equal to the changed second power threshold It is intended to become.

例えば、第１の電力閾値及び第２の電力閾値の制限により誘導加熱部５，１０の入力電力をそれぞれ２ｋＷに、誘導加熱部９の入力電力を２ｋＷに設定しているときに、操作部１２の電力調節ダイヤル１２ｄがさらに「大」の方向に回されて誘導加熱部９の入力電力が２ｋＷから最大の３ｋＷに変更されると、制御回路１１は、その設定電力（３ｋＷ）と他の誘導加熱部５，１０の入力電力との合計が第１の電力閾値（６ｋＷ）を超えたかどうかを判定する。この場合、誘導加熱部９の設定電力が３ｋＷで、他の誘導加熱部５，１０の合計が４ｋＷで、その合計（７ｋＷ）が第１の電力閾値（６ｋＷ）を超えるので、第１の電力閾値（６ｋＷ）から設定電力の３ｋＷを減算した値（３ｋＷ）を新たな第２の電力閾値として変更する。つまり、第１の電力閾値を超えた電力分を第２の電力閾値から差し引いて、その残りの電力を新たな第２の電力閾値として変更する。そして、誘導加熱部５，１０の入力電力の合計が、変更した第２の電力閾値（３ｋＷ）以下になるように誘導加熱部５のスイッチング素子５ｂ，５ｃと誘導加熱部１０のスイッチング素子１０ｂ，１０ｃとをそれぞれ制御すると共に、誘導加熱部９の入力電力が３ｋＷになるようにそのスイッチング素子９ｂ，９ｃを制御する。 For example, when the input power of the induction heating units 5 and 10 is set to 2 kW and the input power of the induction heating unit 9 is set to 2 kW due to the restriction of the first power threshold and the second power threshold, the operation unit 12 When the power adjustment dial 12d is further turned in the “large” direction and the input power of the induction heating unit 9 is changed from 2 kW to the maximum 3 kW, the control circuit 11 determines that the set power (3 kW) and other inductions It is determined whether or not the sum of the input power of the heating units 5 and 10 exceeds the first power threshold (6 kW). In this case, the set power of the induction heating unit 9 is 3 kW, the total of the other induction heating units 5 and 10 is 4 kW, and the total (7 kW) exceeds the first power threshold (6 kW). changing threshold (6 kW) minus the 3k W setting power from (3 kW) as a new second power threshold. That is, the power exceeding the first power threshold is subtracted from the second power threshold, and the remaining power is changed as a new second power threshold. Then, the switching elements 5b and 5c of the induction heating unit 5 and the switching elements 10b of the induction heating unit 10 are set so that the total input power of the induction heating units 5 and 10 is equal to or less than the changed second power threshold (3 kW). 10c and the switching elements 9b and 9c are controlled so that the input power of the induction heating unit 9 is 3 kW.

以上のように実施の形態２によれば、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、誘導加熱部９の入力電力が最大の３ｋＷまでアップされたとき、その設定電力が誘導加熱部９の入力電力となるように増加させると共に、誘導加熱部５，１０の入力電力の合計の上限値となる第２の電力閾値を下げるようにしたので、誘導加熱部５，１０による加熱調理を中断することなく、強い火力を要する調理を誘導加熱部９によって行うことができ、使用者にとって使い勝手の良い誘導加熱調理器１３を提供できる。 As described above, according to the second embodiment, the total input power of the induction heating units 5 and 10 is the second power threshold, and the total of the two input powers and the input power of the induction heating unit 9 is When the input power of the induction heating unit 9 is increased to the maximum 3 kW when it is the first power threshold, the set power is increased so as to become the input power of the induction heating unit 9, and the induction heating unit 5 , 10 to lower the second power threshold value, which is the upper limit of the total input power, the induction heating unit 9 can perform cooking that requires strong heating power without interrupting the heating cooking by the induction heating units 5, 10. The induction heating cooker 13 which can be performed and is convenient for the user can be provided.

実施の形態３．
実施の形態３における誘導加熱調理器の構成は、前記と同様に図１で説明した実施の形態１とほぼ同じであるため、図１を用いて説明する。
実施の形態３の誘導加熱調理器１３は、誘導加熱部５，１０のうち一方の入力電力がアップされて第２の電力閾値を超えたとき、その超えた電力分、他方の入力電力を下げて誘導加熱部５，１０の入力電力の合計が第２の電力閾値以下になるようにし、また、誘導加熱部９の入力電力がアップされて誘導加熱部５，１０との合計が第１の電力閾値を超えたときは、その超えた電力分、誘導加熱部５，１０の入力電力の合計を下げて第１の電力閾値以下となるようにしたものである。 Embodiment 3 FIG.
The configuration of the induction heating cooker in the third embodiment is substantially the same as that of the first embodiment described in FIG. 1 as described above, and will be described with reference to FIG.
When the input power of one of the induction heating units 5 and 10 exceeds the second power threshold when the induction heating cooker 13 of Embodiment 3 exceeds the second power threshold, the other input power is reduced by the excess power. Thus, the total input power of the induction heating units 5 and 10 is set to be equal to or lower than the second power threshold, and the input power of the induction heating unit 9 is increased so that the total with the induction heating units 5 and 10 is the first. When the power threshold value is exceeded, the sum of the input power of the induction heating units 5 and 10 is reduced to be equal to or less than the first power threshold value when the power threshold value is exceeded.

例えば、第１の電力閾値及び第２の電力閾値の制限により誘導加熱部５，１０の入力電力をそれぞれ２ｋＷに、誘導加熱部９の入力電力を２ｋＷに設定しているときに、操作部１２の電力調節ダイヤル１２ｂがさらに「大」の方向に回されて誘導加熱部５の入力電力が２ｋＷから最大の３ｋＷに変更されると、制御回路１１は、その設定電力（３ｋＷ）と誘導加熱部１０の入力電力との合計が第２の電力閾値（４ｋＷ）を超えたかどうかを判定する。この場合は、誘導加熱部５の設定電力が３ｋＷで、誘導加熱部１０の入力電力が２ｋＷで、その合計（５ｋＷ）が第２の電力閾値（４ｋＷ）を超え、その合計（５ｋＷ）と誘導加熱部９の入力電力（２ｋＷ）との合計（７ｋＷ）が第１の電力閾値（６ｋＷ）を超えるので、誘導加熱部１０の入力電力を２ｋＷから１ｋＷまで下げるようにそのスイッチング素子１０ｂ，１０ｃを制御すると共に、誘導加熱部５の入力電力が３ｋＷになるようにそのスイッチング素子５ｂ，５ｃを制御する。この制御により、誘導加熱部５，１０の入力電力の合計（３ｋＷ＋１ｋＷ）が第２の電力閾値（４ｋＷ）以下となり、その合計（４ｋＷ）と誘導加熱部９の入力電力（２ｋＷ）との合計が第１の電力閾値（６ｋＷ）以下となる。 For example, when the input power of the induction heating units 5 and 10 is set to 2 kW and the input power of the induction heating unit 9 is set to 2 kW due to the restriction of the first power threshold and the second power threshold, the operation unit 12 When the power adjustment dial 12b is further turned in the “large” direction and the input power of the induction heating unit 5 is changed from 2 kW to the maximum 3 kW, the control circuit 11 determines that the set power (3 kW) and the induction heating unit It is determined whether the sum of the 10 input powers exceeds the second power threshold (4 kW). In this case, the set power of the induction heating unit 5 is 3 kW, the input power of the induction heating unit 10 is 2 kW, the sum (5 kW) exceeds the second power threshold (4 kW), and the sum (5 kW) and induction Since the total (7 kW) with the input power (2 kW) of the heating unit 9 exceeds the first power threshold (6 kW), the switching elements 10b and 10c are set so as to reduce the input power of the induction heating unit 10 from 2 kW to 1 kW. While controlling, the switching elements 5b and 5c are controlled so that the input electric power of the induction heating part 5 may be set to 3 kW. By this control, the total input power (3 kW + 1 kW) of the induction heating units 5 and 10 becomes equal to or lower than the second power threshold (4 kW), and the total of the total (4 kW) and the input power (2 kW) of the induction heating unit 9 is It becomes 1st electric power threshold value (6 kW) or less.

また例えば、前記と同様に誘導加熱部５，１０の入力電力をそれぞれ２ｋＷに、誘導加熱部９の入力電力を２ｋＷに設定しているときに、操作部１２の電力調節ダイヤル１２ｄによって誘導加熱部９の入力電力が２ｋＷから最大の３ｋＷに変更されると、制御回路１１は、その設定電力（３ｋＷ）と誘導加熱部５，１０の入力電力の合計とが第１の電力閾値（６ｋＷ）を超えたかどうかを判定する。この場合は、誘導加熱部５，１０の入力電力の合計が第２の電力閾値と同じ４ｋＷで、誘導加熱部９の設定電力が３ｋＷで、その合計（７ｋＷ）が第１の電力閾値（６ｋＷ）を超えるので、その超えた電力分、誘導加熱部５，１０の入力電力を下げる。そして、その下げた入力電力が得られるように誘導加熱部５，１０のスイッチング素子５ｂ，５ｃ・１０ｂ，１０ｃをそれぞれ制御し、誘導加熱部９の入力電力が３ｋＷになるようにそのスイッチング素子９ｂ，９ｃを制御する。 Further, for example, when the input power of the induction heating units 5 and 10 is set to 2 kW and the input power of the induction heating unit 9 is set to 2 kW as described above, the induction heating unit is controlled by the power adjustment dial 12d of the operation unit 12. When the input power of 9 is changed from 2 kW to the maximum 3 kW, the control circuit 11 determines that the set power (3 kW) and the total input power of the induction heating units 5 and 10 have the first power threshold (6 kW). Determine whether it has been exceeded. In this case, the total input power of the induction heating units 5 and 10 is 4 kW which is the same as the second power threshold, the set power of the induction heating unit 9 is 3 kW, and the total (7 kW) is the first power threshold (6 kW). ), The input power of the induction heating units 5 and 10 is reduced by the excess power. Then, the switching elements 5b, 5c, 10b, and 10c of the induction heating units 5 and 10 are controlled so that the reduced input power is obtained, and the switching element 9b is set so that the input power of the induction heating unit 9 becomes 3 kW. , 9c.

以上のように実施の形態３によれば、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、誘導加熱部５，１０のうち一方の入力電力がアップされて第２の電力閾値を超えたとき、その超えた電力分、他方の入力電力を下げて誘導加熱部５，１０の入力電力の合計が第２の電力閾値以下となるようにし、また、誘導加熱部９の入力電力がアップされて誘導加熱部５，１０との合計が第１の電力閾値を超えたとき、その超えた電力分、誘導加熱部５，１０の入力電力の合計を下げて第１の電力閾値以下となるようにしたので、誘導加熱部５，１０による加熱調理を中断することなく、強い火力を要する調理を誘導加熱部９によって行うことができ、使用者にとって使い勝手の良い誘導加熱調理器１３を提供できる。 As described above, according to the third embodiment, the total input power of the induction heating units 5 and 10 is the second power threshold, and the total of the two input powers and the input power of the induction heating unit 9 is When the input power of one of the induction heating units 5 and 10 exceeds the second power threshold when the first power threshold is reached, the other input power is reduced by the amount of the excess power and induction is performed. The total input power of the heating units 5 and 10 is set to be equal to or lower than the second power threshold, and the input power of the induction heating unit 9 is increased so that the total with the induction heating units 5 and 10 is the first power threshold. Is exceeded, the sum of the input power of the induction heating units 5 and 10 is lowered to be equal to or lower than the first power threshold, so the cooking by the induction heating units 5 and 10 is interrupted. Without using the induction heating unit 9 to perform cooking that requires strong heating power Can, it is possible to provide a user-friendly induction heating cooker 13 for the user.

なお、実施の形態３では、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときを条件として動作を説明したが、誘導加熱部５，１０の入力電力の合計が第２の電力閾値未満で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値未満であることを条件とした場合でも前記と同様の動作を行い、同じ効果を奏する。 In the third embodiment, the sum of the input powers of the induction heating units 5 and 10 is the second power threshold, and the sum of the two input powers and the input power of the induction heating unit 9 is the first power. Although the operation has been described on the condition that it is a threshold value, the sum of the input power of the induction heating units 5 and 10 is less than the second power threshold value, and the sum of the two input powers and the input power of the induction heating unit 9 Even when the total is less than the first power threshold, the same operation as described above is performed and the same effect is obtained.

実施の形態４．
実施の形態４における誘導加熱調理器の構成は、前記と同様に図１で説明した実施の形態１とほぼ同じであるため、図１を用いて説明する。
実施の形態４の誘導加熱調理器１３は、誘導加熱部５，９，１０のうち何れかの入力電力が電力調節ダイヤルにより下げられた場合、該当する誘導加熱部の入力電力を下げ、この時、第１及び第２の電力閾値の制限により他の誘導加熱部の入力電力が電力調節ダイヤルの設定電力よりも小さく抑えられていた場合は、他の誘導加熱部の入力電力を第１の電力閾値及び第２の電力閾値の範囲で増やすようにしたものである。 Embodiment 4 FIG.
The configuration of the induction heating cooker in the fourth embodiment is substantially the same as that of the first embodiment described in FIG. 1 as described above, and will be described with reference to FIG.
The induction heating cooker 13 according to the fourth embodiment reduces the input power of the corresponding induction heating unit when any one of the induction heating units 5, 9, and 10 is lowered by the power adjustment dial. When the input power of the other induction heating unit is suppressed to be smaller than the set power of the power adjustment dial due to the restriction of the first and second power thresholds, the input power of the other induction heating unit is set to the first power. The threshold value is increased within the range of the second power threshold value.

例えば、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、操作部１２の電力調節ダイヤル１２ｃが「小」の方向に回されて誘導加熱部１０の入力電力が設定電力まで下げられると、制御回路１１は、誘導加熱部１０の入力電力が設定電力まで下がるように制御し、かつ、他の誘導加熱部５，９の入力電力がそれぞれ電力調節ダイヤル１２ｂ，１２ｄによって設定された電力よりも小さいかどうかを判定する。 For example, when the sum of the input power of the induction heating units 5 and 10 is the second power threshold, and the sum of the two input powers and the input power of the induction heating unit 9 is the first power threshold, When the power adjustment dial 12c of the operation unit 12 is turned in the “small” direction and the input power of the induction heating unit 10 is lowered to the set power, the control circuit 11 reduces the input power of the induction heating unit 10 to the set power. In addition, it is determined whether or not the input power of the other induction heating units 5 and 9 is smaller than the power set by the power adjustment dials 12b and 12d, respectively.

例えば、電力調節ダイヤル１２ｂによって設定されている誘導加熱部５の設定電力が現在の入力電力よりも小さいときは、誘導加熱部１０の下げた入力電力と電力調節ダイヤル１２ｂによって設定されている誘導加熱部５の設定電力の合計が第２の電力閾値（４ｋＷ）以下かどうかを判定する。その合計が第２の電力閾値以下のときは、誘導加熱部５の設定電力が入力電力となるように制御し、また、その合計が第２の電力閾値を超えるときは、第２の電力閾値を超えない範囲内で誘導加熱部５の入力電力を増やすように制御する。さらに、電力調節ダイヤル１２ｄによって設定されている誘導加熱部９の設定電力が現在の入力電力よりも小さいときは、誘導加熱部１０の下げた入力電力、誘導加熱部５の設定電力及び電力調節ダイヤル１２ｄによって設定されている誘導加熱部９の設定電力の合計が第１の電力閾値（６ｋＷ）以下かどうかを判定する。その合計が第１の電力閾値以下のときは、誘導加熱部９の設定電力が入力電力となるように制御し、また、その合計が第１の電力閾値を超えるときは、第１の電力閾値を超えない範囲内で誘導加熱部９の入力電力を増やすように制御する。 For example, when the set power of the induction heating unit 5 set by the power adjustment dial 12b is smaller than the current input power, the reduced input power of the induction heating unit 10 and the induction heating set by the power adjustment dial 12b It is determined whether the total set power of the unit 5 is equal to or less than the second power threshold value (4 kW). When the sum is less than or equal to the second power threshold, the set power of the induction heating unit 5 is controlled to be the input power. When the sum exceeds the second power threshold, the second power threshold Control is performed so as to increase the input power of the induction heating unit 5 within a range not exceeding. Further, when the set power of the induction heating unit 9 set by the power adjustment dial 12d is smaller than the current input power, the input power lowered by the induction heating unit 10, the set power of the induction heating unit 5 and the power adjustment dial It is determined whether the total set power of the induction heating unit 9 set by 12d is equal to or less than the first power threshold (6 kW). When the sum is less than or equal to the first power threshold, control is performed so that the set power of the induction heating unit 9 becomes the input power. When the sum exceeds the first power threshold, the first power threshold Control is performed so as to increase the input power of the induction heating unit 9 within a range not exceeding.

以上のように実施の形態４によれば、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、何れかの入力電力が電力調節ダイヤルにより下げられた場合、該当する誘導加熱部の入力電力を下げ、この時、他の誘導加熱部の入力電力が電力調節ダイヤルの設定電力よりも小さく抑えられていた場合は、他の誘導加熱部の入力電力を第１の電力閾値及び第２の電力閾値以下になる範囲で増やすようにしたので、第１の電力閾値及び第２の電力閾値の制限により設定電力よりも小さい入力電力を火力としている誘導加熱部に対する電力設定の再操作が不要になり、使用者にとって使い勝手の良い誘導加熱調理器１３を提供できる。 As described above, according to the fourth embodiment, the total input power of the induction heating units 5 and 10 is the second power threshold, and the total of the two input powers and the input power of the induction heating unit 9 is If any input power is lowered by the power adjustment dial when the power threshold is the first power threshold, the input power of the corresponding induction heating unit is lowered, and at this time, the input power of the other induction heating unit is adjusted. Since the input power of the other induction heating unit is increased in a range that is less than or equal to the first power threshold and the second power threshold when the power is set lower than the set power of the dial, the first power threshold And the restriction | limiting of a 2nd electric power threshold value WHEREIN: The re-operation of the electric power setting with respect to the induction heating part which uses the input electric power smaller than setting electric power as a thermal power becomes unnecessary, and the user can provide the induction heating cooking appliance 13 which is user-friendly.

なお、実施の形態４では、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、何れかの入力電力が下げられた場合の動作を説明したが、誘導加熱部５，１０の入力電力の合計が第２の電力閾値未満で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値未満である場合においても前記と同様の動作を行い、同じ効果を奏する。 In the fourth embodiment, the sum of the input power of the induction heating units 5 and 10 is the second power threshold, and the sum of the two input powers and the input power of the induction heating unit 9 is the first power threshold. When the input power is reduced when the input power is reduced, the sum of the input power of the induction heating units 5 and 10 is less than the second power threshold, and the sum of the two input powers Even when the sum of the input power of the induction heating unit 9 is less than the first power threshold value, the same operation as described above is performed and the same effect is obtained.

実施の形態５．
実施の形態５における誘導加熱調理器の構成は、前記と同様に図１で説明した実施の形態１とほぼ同じであるため、図１を用いて説明する。
実施の形態５の誘導加熱調理器１３は、誘導加熱部５，９，１０のうち何れかの入力電力が電力調節ダイヤルにより下げられた場合、該当する誘導加熱部の入力電力を下げ、他の誘導加熱部の入力電力を上げることなく現状を維持するようにしたものである。 Embodiment 5 FIG.
The configuration of the induction heating cooker in the fifth embodiment is substantially the same as that of the first embodiment described in FIG. 1 as described above, and will be described with reference to FIG.
In the induction heating cooker 13 of the fifth embodiment, when any input power of the induction heating units 5, 9, 10 is lowered by the power adjustment dial, the input power of the corresponding induction heating unit is lowered, The current state is maintained without increasing the input power of the induction heating unit.

例えば、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、電力調節ダイヤル１２ｃにより誘導加熱部１０の入力電力が下げられると、制御回路１１は、誘導加熱部５，９の入力電力を変えることなく、誘導加熱部１０の入力電力が電力調節ダイヤル１２ｃによって設定された電力まで下がるように誘導加熱部１０のスイッチング素子１０ｂ，１０ｃを制御する。また、誘導加熱部９の入力電力が電力調節ダイヤル１２ｄにより下げられた場合は、誘導加熱部５，１０の入力電力を変えることなく、その入力電力が電力調節ダイヤル１２ｃの設定電力まで下がるように誘導加熱部９のスイッチング素子９ｂ，９ｃを制御する。 For example, when the sum of the input power of the induction heating units 5 and 10 is the second power threshold, and the sum of the two input powers and the input power of the induction heating unit 9 is the first power threshold, When the input power of the induction heating unit 10 is lowered by the power adjustment dial 12c, the control circuit 11 sets the input power of the induction heating unit 10 by the power adjustment dial 12c without changing the input power of the induction heating units 5 and 9. The switching elements 10b and 10c of the induction heating unit 10 are controlled so as to be reduced to the generated power. When the input power of the induction heating unit 9 is lowered by the power adjustment dial 12d, the input power is reduced to the set power of the power adjustment dial 12c without changing the input power of the induction heating units 5 and 10. The switching elements 9b and 9c of the induction heating unit 9 are controlled.

以上のように実施の形態５によれば、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときに、何れかの入力電力が電力調節ダイヤルにより下げられた場合、該当する誘導加熱部のみの入力電力を下げるようにしたので、使用者にとって、加熱調理中の誘導加熱部５，９，１０の火力の状態がわかりやすくなり、使用者にとって使い勝手の良い誘導加熱調理器１３を提供できる。 As described above, according to the fifth embodiment, the total input power of the induction heating units 5 and 10 is the second power threshold, and the total of the two input powers and the input power of the induction heating unit 9 is When any input power is lowered by the power adjustment dial at the first power threshold, the input power of only the corresponding induction heating unit is lowered. The state of the heating power of the heating units 5, 9, and 10 can be easily understood, and the induction heating cooker 13 that is convenient for the user can be provided.

なお、実施の形態５では、誘導加熱部５，１０の入力電力の合計が第２の電力閾値で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値であるときを条件として動作を説明したが、誘導加熱部５，１０の入力電力の合計が第２の電力閾値未満で、その２つの入力電力の合計と誘導加熱部９の入力電力との合計が第１の電力閾値未満であることを条件とした場合でも前記と同様の動作を行い、同じ効果を奏する。 In the fifth embodiment, the sum of the input powers of the induction heating units 5 and 10 is the second power threshold, and the sum of the two input powers and the input power of the induction heating unit 9 is the first power. Although the operation has been described on the condition that it is a threshold value, the sum of the input power of the induction heating units 5 and 10 is less than the second power threshold value, and the sum of the two input powers and the input power of the induction heating unit 9 Even when the total is less than the first power threshold, the same operation as described above is performed and the same effect is obtained.

実施の形態６．
図２は本発明の実施の形態６を示す誘導加熱調理器の回路図である。なお、図１で説明した実施の形態１と同一又は相当部分には同じ符号を付し説明を省略する。
図２に示す実施の形態６は、誘導加熱調理器１３に電力表示部１４を備えたものである。この電力表示部１４は、誘導加熱部５に対応して設けられたＬＥＤ表示部１４ａと、誘導加熱部５に対応して設けられたＬＥＤ表示部１４ｂと、誘導加熱部１０に対応して設けられたＬＥＤ表示部１４ｃとからなり、制御回路１１によって算出された入力電力に基づいてＬＥＤを点灯させる。例えば、誘導加熱部５に最大の３ｋＷの入力電力が供給されているとき、ＬＥＤ表示部１４ａの全てのＬＥＤ１〜６を点灯させ、入力電力が５００Ｗ以下の場合は、ＬＥＤ１のみを点灯させる。 Embodiment 6 FIG.
FIG. 2 is a circuit diagram of an induction heating cooker showing Embodiment 6 of the present invention. In addition, the same code | symbol is attached | subjected to the same or equivalent part as Embodiment 1 demonstrated in FIG. 1, and description is abbreviate | omitted.
In Embodiment 6 shown in FIG. 2 , an induction heating cooker 13 is provided with a power display unit 14. The power display unit 14 is provided corresponding to the LED display unit 14 a provided corresponding to the induction heating unit 5, the LED display unit 14 b provided corresponding to the induction heating unit 5, and the induction heating unit 10. LED display unit 14c, and the LED is turned on based on the input power calculated by the control circuit 11. For example, when the maximum input power of 3 kW is supplied to the induction heating unit 5, all the LEDs 1 to 6 of the LED display unit 14a are turned on, and when the input power is 500 W or less, only the LED 1 is turned on.

このように、各誘導加熱部５，９，１０にそれぞれ供給されている入力電力に応じて、ＬＥＤ表示部１４ａ，１４ｂ，１４ｃのＬＥＤを点灯させるようにしたので、各誘導加熱部５，９，１０の使用状況が容易にわかり、使用者にとって使い勝手の良い誘導加熱調理器１３を提供できる。 As described above, since the LEDs of the LED display units 14a, 14b, and 14c are turned on according to the input power supplied to the induction heating units 5, 9, and 10, respectively, the induction heating units 5, 9 are used. , 10 can be easily understood, and the induction heating cooker 13 that is convenient for the user can be provided.

本発明の実施の形態１〜５を示す誘導加熱調理器の回路図である。It is a circuit diagram of the induction heating cooking appliance which shows Embodiment 1-5 of this invention. 本発明の実施の形態６を示す誘導加熱調理器の回路図である。It is a circuit diagram of the induction heating cooking appliance which shows Embodiment 6 of this invention.

Explanation of symbols

１商用電源、２ノイズフィルタ、３整流回路、４コンデンサ、５誘導加熱部、６ノイズフィルタ、７整流回路、８コンデンサ、９誘導加熱部、１０誘導加熱部、１１制御回路、１２操作部、１３誘導加熱調理器、１４電力表示部。
DESCRIPTION OF SYMBOLS 1 Commercial power supply, 2 Noise filter, 3 Rectifier circuit, 4 Capacitor, 5 Induction heating part, 6 Noise filter, 7 Rectifier circuit, 8 Capacitor, 9 Induction heating part, 10 Induction heating part, 11 Control circuit, 12 Operation part, 13 Induction heating cooker, 14 power display.

Claims

A first DC power supply circuit for converting AC of a commercial power supply to DC;
A second DC power supply circuit for converting AC of the commercial power supply to DC;
A plurality of induction heating units having a heating coil, switching at a high frequency to convert the output of the first DC power supply circuit to a high frequency power, and supplying the high frequency power;
A single induction heating unit having a heating coil, switching at a high frequency to convert the output of the second DC power supply circuit into a high frequency power, and supplying the high frequency power;
A control unit that controls each induction heating unit so that the electric power set by the operation unit can be obtained;
When the control unit controls each induction heating unit, the total power of a plurality of induction heating units and the power of a single induction heating unit is equal to or less than a first power threshold, and a plurality of An induction heating cooker characterized in that the total power of the induction heating unit is equal to or less than a second power threshold value.

The control unit controls the single induction heating unit so as to obtain the power when the first power threshold is exceeded due to the increase in power of the single induction heating unit, and the first power threshold is set to 2. The induction heating cooking according to claim 1, wherein the second power threshold is lowered by an amount corresponding to the excess power so that the total power of the plurality of induction heating units is equal to or lower than the lowered second power threshold. vessel.

When the control unit exceeds the first and second power thresholds or any of the power thresholds due to an increase in power of any one of the plurality of induction heating units and the single induction heating unit, the corresponding 2. The induction heating cooker according to claim 1, wherein the power of the induction heating unit is increased and the power of the other induction heating unit is lowered so as to be equal to or lower than the first and second power thresholds.

When the power of any one of the plurality of induction heating units and the single induction heating unit is reduced, the control unit lowers the power of the corresponding induction heating unit and lowers the power. In addition, when another induction heating unit is heated at a power smaller than the set power of the operation unit, the power is increased within a range not exceeding the first and second power thresholds. The induction heating cooker according to any one of claims 1 to 3.

Induction according to any one of claims 1 to 4, further comprising a power display unit to display the individual power of the plurality of induction heating section and a single induction heating unit which is controlled by the control unit, respectively Cooking cooker.