JP2017107672A - Induction heating cooker - Google Patents

Induction heating cooker Download PDF

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JP2017107672A
JP2017107672A JP2015239032A JP2015239032A JP2017107672A JP 2017107672 A JP2017107672 A JP 2017107672A JP 2015239032 A JP2015239032 A JP 2015239032A JP 2015239032 A JP2015239032 A JP 2015239032A JP 2017107672 A JP2017107672 A JP 2017107672A
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heating
detection circuit
current detection
unit
current
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JP6535587B2 (en
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達朗 上田
Tatsuro Ueda
達朗 上田
雄樹 西脇
Yuki Nishiwaki
雄樹 西脇
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Hitachi Appliances Inc
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Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker that adjusts a plurality of heating parts to equal consumption power.SOLUTION: An induction heating cooker comprises: a plurality of heating parts 120 formed by a heating coil 5 heating a load by induction and an inverter part 114 supplying electric power to the heating coil 5; a rectifying circuit 102 which generates electric power to be supplied to the plurality of heating parts 120; a total current detection circuit 115 capable of detecting a total input current to the heating parts 120; an individual current detection circuit connected to the total current detection circuit 115 in series and detecting input currents to the heating parts 120; and control means 119 of controlling the inverter part 114 according to the currents detected by the total current detection circuit 115 and individual current detection circuit 117 so as to control electric power of the heating coil 5, the control means 119 using a detection result of the total current detection circuit 115 for adjustment of the current detection by the individual current detection circuit 117.SELECTED DRAWING: Figure 5

Description

本発明は、誘導加熱調理器の電力制御に関するものである。   The present invention relates to power control of an induction heating cooker.

特許文献1に2口の加熱口を有する誘導加熱調理器が示されている。   Patent Document 1 discloses an induction heating cooker having two heating ports.

該誘導加熱調理器は2口の加熱口を備えるために、加熱コイル、インバーター回路、直流電源回路、入力電流検出回路、入力電圧検出回路をそれぞれ2セット備えている。具体的には、1口の誘導加熱調理器を2台備えているのと同じ規模の回路構成となっている。   Since the induction heating cooker has two heating ports, the induction heating cooker includes two sets of heating coils, inverter circuits, DC power supply circuits, input current detection circuits, and input voltage detection circuits. Specifically, it has a circuit configuration of the same scale as that provided with two induction heating cookers.

誘導加熱調理器に用いる誘導加熱部は、加熱コイルに流れる電流を制御することで負荷の加熱を行うものである。商用交流電源を直流電源回路で全波整流してインバーター回路の直流電源とし、インバーター回路は加熱コイルと共振用コンデンサを直列もしくは並列に接続して、前記直流電源から供給される電流を高速で入り切りするスイッチング素子を高速でオンオフすることで、加熱コイルに流れる電流を制御して鍋を誘導加熱するものである。   The induction heating unit used in the induction heating cooker heats the load by controlling the current flowing through the heating coil. A commercial AC power supply is full-wave rectified by a DC power supply circuit to form a DC power supply for an inverter circuit. The inverter circuit connects a heating coil and a resonance capacitor in series or in parallel, and turns on and off the current supplied from the DC power supply at high speed. By turning on and off the switching element at a high speed, the current flowing in the heating coil is controlled to inductively heat the pan.

鍋を加熱する電力の制御は、前記直流電源回路の前段(商用交流電源側)に設置した商用電源に流れる電流を検出する入力電流検出回路からの入力値と、前記直流電源回路の整流ダイオードブリッジの後段(チョークコイル側)に設置した商用交流電源の電圧を検出する入力電圧検出回路からの入力値を制御部で演算することで加熱コイルの消費電力を計算し、使用者が設定した目標電力になるように電力を制御するものである。   Control of the electric power for heating the pan is performed by using an input value from an input current detection circuit for detecting a current flowing in a commercial power supply installed in a previous stage (commercial AC power supply side) of the DC power supply circuit, and a rectifier diode bridge of the DC power supply circuit. The power consumption of the heating coil is calculated by calculating the input value from the input voltage detection circuit that detects the voltage of the commercial AC power supply installed in the subsequent stage (choke coil side), and the target power set by the user The power is controlled so that

しかし、入力電源電圧検出回路や入力電流検出回路などには一般的にカレントトランスを用いた入力電流検出回路ではカレントトランス自体の検出誤差や検出回路を構成する電子部品のバラツキによって検出誤差が発生する。   However, in an input current detection circuit using a current transformer for an input power supply voltage detection circuit, an input current detection circuit, etc., a detection error occurs due to a detection error of the current transformer itself and variations of electronic components constituting the detection circuit. .

これらの検出誤差を補正するために、製品組み立て後に個々の加熱コイルの消費電力の調整作業を行っている。   In order to correct these detection errors, the power consumption of each heating coil is adjusted after product assembly.

特開2010−257841号公報JP 2010-257841 A

前述した2口の誘導加熱調理器は、加熱コイル、インバーター回路、直流電源回路、入力電流検出回路、入力電圧検出回路がそれぞれ独立して2セット有るため、個々の加熱コイルの消費電力を個々に調整する必要が有る。しかし、調整誤差により同じ火力に設定した場合でも、2口の加熱コイル間で消費電力に差が生じる場合がある。   The above-described two-induction cooking device has two sets of heating coils, inverter circuits, DC power supply circuits, input current detection circuits, and input voltage detection circuits, so the power consumption of each heating coil can be individually set. There is a need to adjust. However, even when the same heating power is set due to an adjustment error, there may be a difference in power consumption between the two heating coils.

従って、加熱部(加熱コイル)毎に調整誤差が生じると加熱部毎に消費電力が異なり、使用者は加熱部毎に調理手順や調理時間を調整しなければならない。また使用者は同じ火加減に操作の設定をしても加熱部毎に調理手順や調理時間を調整しなければならず使い勝手が悪い。   Therefore, if an adjustment error occurs for each heating unit (heating coil), the power consumption differs for each heating unit, and the user must adjust the cooking procedure and cooking time for each heating unit. In addition, even if the user sets the operation to the same level, the cooking procedure and cooking time must be adjusted for each heating unit, which is inconvenient.

本発明は、上記の課題を解決するためになされたものであり、負荷を誘導加熱する加熱コイルと該加熱コイルへ電力を供給するインバータ部とで生成する複数の加熱部と、該複数の加熱部へ供給する電源を生成する整流回路と、前記加熱部の合計の入力電流を検出できる合計電流検出回路と、該合計電流検出回路と直列に接続し前記加熱部の入力電流を検出する個別電流検出回路と、前記合計電流検出回路と前記個別電流検出回路とで検出した電流に応じて前記インバータ部を制御して前記加熱コイルの電力を制御する制御手段とを備え、該制御手段は、前記個別電流検出回路の電流検知の調整に前記合計電流検出回路の検知結果を用いるものである。   The present invention has been made to solve the above-described problem, and includes a plurality of heating units generated by a heating coil that induction-heats a load and an inverter unit that supplies power to the heating coil, and the plurality of heating units. A rectifier circuit that generates power to be supplied to the unit, a total current detection circuit that can detect the total input current of the heating unit, and an individual current that is connected in series with the total current detection circuit and detects the input current of the heating unit A detection circuit; and control means for controlling the power of the heating coil by controlling the inverter unit according to the current detected by the total current detection circuit and the individual current detection circuit. The detection result of the total current detection circuit is used for adjustment of current detection of the individual current detection circuit.

本発明によれば、備えている複数の加熱部の消費電力を等しく調整する誘導加熱調理器を提供する。   According to this invention, the induction heating cooking appliance which adjusts the power consumption of the some heating part with which it equips equally is provided.

本発明に関する誘導加熱調理器をシステムキッチンに組み込んだ状態の外観斜視図。The external appearance perspective view of the state which incorporated the induction heating cooking appliance concerning this invention in the system kitchen. 同誘導加熱調理器の外観斜視図。The external appearance perspective view of the induction heating cooking appliance. 同誘導加熱調理器の前面操作部の説明図。Explanatory drawing of the front operation part of the same induction heating cooking appliance. 同誘導加熱調理器の上面操作部、上面表示部の説明図。Explanatory drawing of the upper surface operation part of the induction heating cooking appliance, and an upper surface display part. 同誘導加熱調理器の制御回路図。The control circuit diagram of the induction heating cooking appliance. 同誘導加熱調理器の調整作業の説明図。Explanatory drawing of the adjustment work of the induction heating cooking appliance.

以下、本発明の実施例を添付図面に従って説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図1は、本発明の実施例を説明する誘導加熱調理器をシステムキッチンに組み込んだ状態の斜視図である。図2は、誘導加熱調理器の斜視図である。   FIG. 1 is a perspective view showing a state in which an induction cooking device for explaining an embodiment of the present invention is incorporated in a system kitchen. FIG. 2 is a perspective view of the induction heating cooker.

図1、図2において、1は、誘導加熱調理器の本体である。2は、本体1の上面を覆うトッププレートで、耐熱性の高い素材、例えば、結晶化ガラス等が用いられ、その上面には鍋等の被加熱物が載置される。   1 and 2, reference numeral 1 denotes a main body of the induction heating cooker. Reference numeral 2 denotes a top plate that covers the upper surface of the main body 1, and a material having high heat resistance, such as crystallized glass, is used, and an object to be heated such as a pan is placed on the upper surface.

3は、トッププレート枠であり、トッププレート2の端部を覆うもので、該トッププレート2の間にはシール材が充填されており、これによりトッププレート枠3はトッププレート2に固着されている。そして、トッププレート2の上に液体がこぼれても、シール材により本体1内部への水の浸入が防止され水密構造が実現される。   Reference numeral 3 denotes a top plate frame that covers the end of the top plate 2 and is filled with a sealing material between the top plates 2, whereby the top plate frame 3 is fixed to the top plate 2. Yes. And even if a liquid spills on the top plate 2, the sealing material prevents water from entering the inside of the main body 1, thereby realizing a watertight structure.

また、トッププレート枠3は本体1にも固定されていて、本体1をシステムキッチン13に組み込むときには、トッププレート枠3で本体1を吊り下げて設置される。   The top plate frame 3 is also fixed to the main body 1, and when the main body 1 is assembled into the system kitchen 13, the main plate 1 is suspended from the top plate frame 3 and installed.

4は、鍋位置表示部であり、トッププレート2の上面に設けられ、鍋等の被調理物の載置場所を表示している。   Reference numeral 4 denotes a pan position display unit, which is provided on the top surface of the top plate 2 and displays a place where a cooking object such as a pan is placed.

5は、加熱コイルで、トッププレート2に略水平になるように鍋位置表示部4の下方の本体1内に設けられており、加熱コイル5に高周波電流を印加して高周波磁界を発生させ、トッププレート2に載置された鍋等の被調理物を誘導加熱する。加熱コイル5に流れる電流を制御することで、負荷の鍋等の被加熱物の加熱を行うものである。   5 is a heating coil, which is provided in the main body 1 below the pan position display unit 4 so as to be substantially horizontal to the top plate 2. A high frequency current is applied to the heating coil 5 to generate a high frequency magnetic field, An object to be cooked such as a pan placed on the top plate 2 is induction-heated. By controlling the current flowing through the heating coil 5, the object to be heated such as a load pan is heated.

6は、グリル加熱手段であり、加熱コイル5の下方で本体1の左側または右側(本実施例では左側)の本体1前面部に設けられ、矩形状の箱体で構成されていて、中に入れられた被加熱物を加熱するシーズヒータ等の加熱手段を有している。   6 is a grill heating means, which is provided on the front side of the main body 1 on the left side or the right side (left side in this embodiment) of the main body 1 below the heating coil 5 and is composed of a rectangular box. It has a heating means such as a sheathed heater for heating the object to be heated.

7は、グリル加熱手段6の扉で、とって7aが設けられており、グリル加熱手段6の内部には扉7に伴って出し入れ可能な受け皿(図示せず)が収納されている。   Reference numeral 7 denotes a door of the grill heating means 6, which is provided with 7 a, and a receiving tray (not shown) that can be taken in and out with the door 7 is accommodated inside the grill heating means 6.

8は、トッププレート枠3の後枠部に開口する吸気部であり、後記するインバータ部や加熱コイル5等を冷却する空気を吸気する。   Reference numeral 8 denotes an intake portion that opens to the rear frame portion of the top plate frame 3, and intakes air that cools an inverter portion, a heating coil 5, and the like described later.

9は、トッププレート枠3の後枠部に開口する排気部であり、インバータ回路や加熱コイル5等を冷却した空気やグリル加熱手段6からの排煙を排気する。そして、吸気部8、及び排気部9は、トッププレート2上にこぼした液体が開口部から吸気部8や排気部9内に落下しても本体1内部のインバータ回路等に浸入しない構成となっている。   Reference numeral 9 denotes an exhaust portion that opens to the rear frame portion of the top plate frame 3, and exhausts air that has cooled the inverter circuit, the heating coil 5, and the like, and smoke exhausted from the grill heating means 6. The intake unit 8 and the exhaust unit 9 are configured not to enter the inverter circuit or the like inside the main body 1 even if liquid spilled on the top plate 2 falls into the intake unit 8 or the exhaust unit 9 from the opening. ing.

11は、電源切/入スイッチで、本体1前面に設けられ、本体1の主電源の入切を行う。   A power off / on switch 11 is provided on the front surface of the main body 1 to turn on / off the main power of the main body 1.

10は、開閉収納式の前面操作部で、主にグリル加熱手段6を操作するものであり、本実施例ではグリル加熱手段6の隣に位置するように本体1の前面右側に設けられている。   Reference numeral 10 denotes an openable / retractable front operation unit that mainly operates the grill heating means 6 and is provided on the right side of the front surface of the main body 1 so as to be located next to the grill heating means 6 in this embodiment. .

また、前面操作部10は、閉じているときに上部を本体1側に押すことによりロック装置(図示せず)が解除され、前面操作部10の上部が前面側にバネと制御装置(図示せず)により前面側にゆっくりと回動して飛び出すようになっており、逆に閉じるときは上部を本体1側に向かって押し込むことにより本体1に収納され、ロック装置により保持される構成となっている。   Further, when the front operation unit 10 is closed, the locking device (not shown) is released by pushing the upper part to the main body 1 side, and the upper part of the front operation unit 10 is provided with a spring and a control device (not shown). )), When it is closed, it is housed in the main body 1 by pushing the upper part toward the main body 1 and held by the locking device. ing.

なお、図1は前面操作部10が開いている状態を示し、図2は前面操作部10が閉じている状態を示す。   1 shows a state where the front operation unit 10 is open, and FIG. 2 shows a state where the front operation unit 10 is closed.

前面操作部10の前面操作キー10aは、グリル加熱手段6のシーズヒータを入切する等の操作を行い、前面操作キー10aで操作した内容は前面表示部10bで使用者に判り易く表示される。   The front operation key 10a of the front operation unit 10 performs operations such as turning on / off the sheathed heater of the grill heating means 6, and the contents operated by the front operation key 10a are displayed on the front display unit 10b in an easily understandable manner for the user. .

20は、操作表示部で、前面操作部10、電源切/入スイッチ11と、上面操作部12と、上面表示部14で構成し、操作信号を制御手段119(図5)に送る。   An operation display unit 20 includes a front operation unit 10, a power-off / on switch 11, an upper surface operation unit 12, and an upper surface display unit 14, and sends an operation signal to the control means 119 (FIG. 5).

図3では、前面操作キー10aには、グリル加熱手段6の加熱の開始停止を操作する切/スタートキー80、調理の仕上がりを設定する仕上がりキー59が設けられ、仕上がりキー59は、図3に示すようにダウンキー59a、アップキー59bを備える。   In FIG. 3, the front operation key 10a is provided with a cut / start key 80 for operating the heating start / stop of the grill heating means 6 and a finish key 59 for setting the finish of cooking. The finish key 59 is shown in FIG. As shown, a down key 59a and an up key 59b are provided.

図4では、12は上面操作部で、トッププレート2の前側に設けられており、夫々の加熱コイル5の出力等を調整するキーを配列し、上面操作部左12b、上面操作部中央12c、上面操作部右12aから構成され、上面操作部左12bには、加熱コイル5の加熱の開始停止を操作する切/スタートキー56を設け、上面操作部右12aには、加熱コイル5の加熱の開始停止を操作する切/スタートキー48を設けている。   In FIG. 4, reference numeral 12 denotes an upper surface operation unit, which is provided on the front side of the top plate 2, and arranges keys for adjusting the output and the like of the respective heating coils 5. The upper operation section right 12a is provided. The upper operation section left 12b is provided with a start / stop key 56 for operating heating start / stop of the heating coil 5, and the upper operation section right 12a is provided with a heating coil. A cut / start key 48 for operating start / stop is provided.

14は、上面表示部で、上面操作部12で設定した内容を表示するLCD、LEDを配列して、上面表示部左14b、上面表示部中央14c、上面表示部右14aから構成されている。   Reference numeral 14 denotes an upper surface display unit, which includes an LCD and LEDs for displaying the contents set by the upper surface operation unit 12, and includes an upper surface display portion left 14b, an upper surface display portion center 14c, and an upper surface display portion right 14a.

図5は加熱コイル5a、5b、5cに高周波電流を流し鍋等の加熱を制御する制御回路である。商用交流電源101の交流電力を整流回路102で全波整流して直流に変換し、インバータ手段の直流電源とし、チョークコイル103a、103b、103cを介してそれぞれのインバータ手段であるインバータ部114a、114b、114cに入力する。   FIG. 5 shows a control circuit for controlling the heating of the pan or the like by supplying a high-frequency current to the heating coils 5a, 5b and 5c. The AC power of the commercial AC power supply 101 is full-wave rectified by the rectifier circuit 102 to be converted into DC, and used as the DC power supply of the inverter means. , 114c.

114は、インバータ部で、加熱コイル5へ電力を供給する。   An inverter unit 114 supplies power to the heating coil 5.

インバータ部114aは整流回路の出力間に直列に接続されたスイッチング素子107aおよび108aとそれぞれに逆並列に接続されたダイオード109a、110aとスイッチング素子108aに並列に接続された加熱コイル5aと、スイッチング素子と並列に接続された共振コンデンサ112a、113aからなる。   The inverter unit 114a includes switching elements 107a and 108a connected in series between outputs of the rectifier circuit, diodes 109a and 110a connected in antiparallel to each other, a heating coil 5a connected in parallel to the switching element 108a, and a switching element And resonant capacitors 112a and 113a connected in parallel.

スイッチング素子107a、108aはそれぞれドライバ回路105a、106aを介して制御手段119が駆動する。前記直流電源から供給される電流を高速で入り切りするスイッチング素子を高速でオンオフすることで、加熱コイル5aに流れる電流を制御し誘導加熱を行うものである。   The switching elements 107a and 108a are driven by the control means 119 via driver circuits 105a and 106a, respectively. The switching element that turns on and off the current supplied from the DC power supply at high speed is turned on and off at high speed, thereby controlling the current flowing through the heating coil 5a and performing induction heating.

インバータ部114bおよび114cの構成はインバータ部114aと同じなので説明は省略する。   Since the configuration of the inverter units 114b and 114c is the same as that of the inverter unit 114a, description thereof is omitted.

加熱コイル5とインバータ部114で加熱部120を成す。実施例では、複数(3個)の加熱部120より構成する。119は制御手段で、インバータ部114を制御して加熱コイル5で消費する電力を制御する。102は整流回路で、複数の加熱部120で共有する。   A heating unit 120 is formed by the heating coil 5 and the inverter unit 114. In the embodiment, a plurality of (three) heating units 120 are used. Reference numeral 119 denotes a control unit that controls the inverter unit 114 to control the power consumed by the heating coil 5. Reference numeral 102 denotes a rectifier circuit shared by the plurality of heating units 120.

合計電流検出回路115は全ての加熱部120であるインバータ部114a、114b、114cの合計の入力電流を検出する。電圧検出回路116で商用電源の電源電圧を検出する。   The total current detection circuit 115 detects the total input current of the inverter units 114a, 114b, and 114c, which are all the heating units 120. The voltage detection circuit 116 detects the power supply voltage of the commercial power supply.

電圧検出回路116は分圧抵抗で電源電圧を分圧し、ダイオードで整流し制御手段119に入力する。よって電圧検出回路116はこれら抵抗素子のバラツキで検出誤差が発生する。   The voltage detection circuit 116 divides the power supply voltage with a voltage dividing resistor, rectifies it with a diode, and inputs it to the control means 119. Therefore, the voltage detection circuit 116 generates a detection error due to variations in these resistance elements.

シャント抵抗の両端電圧を増幅する回路で構成される個別電流検出回路117b、117cでインバータ部114b、114cの各入力電流を検出する。シャント抵抗を用いた検出回路もシャント抵抗自体のバラツキとオペアンプによる増幅回路の抵抗素子のバラツキにより検出誤差が発生する。   The individual current detection circuits 117b and 117c configured by a circuit that amplifies the voltage across the shunt resistor detect each input current of the inverter units 114b and 114c. The detection circuit using the shunt resistor also generates a detection error due to variations in the shunt resistor itself and variations in the resistance elements of the amplifier circuit using the operational amplifier.

電流検出回路は一般的にカレントトランスによる検出回路とシャント抵抗とオペアンプによる増幅回路の組み合わせによるものがある。カレントトランスによる電流検出回路はカレントトランス自体の検出誤差や抵抗素子のバラツキによって検出誤差が発生する。   The current detection circuit is generally a combination of a detection circuit using a current transformer and an amplifier circuit using a shunt resistor and an operational amplifier. In the current detection circuit using the current transformer, a detection error occurs due to a detection error of the current transformer itself and variations in resistance elements.

117は個別電流検出回路で、特定の一カ所の加熱部120に流れる入力電流を検出するもので前記合計電流検出回路115と直列に入っている。本実施例では、複数の加熱部120のうち一つの加熱部120aを除いて、他の個々の加熱部120b,120cの入力電流Jb、Jcを検出する。   Reference numeral 117 denotes an individual current detection circuit that detects an input current flowing in a specific heating unit 120 and is connected in series with the total current detection circuit 115. In the present embodiment, the input currents Jb and Jc of the other individual heating units 120b and 120c are detected except for one heating unit 120a among the plurality of heating units 120.

制御手段119は、個別電流検出回路117を接続しない一つの加熱部120aであるインバータ回路114aの入力電流Kを、合計電流検出回路115で検出したインバータ部114a、114b、114cの合計の入力電流Hから、個別電流検出回路117b、117cで検出したインバータ部114b、114cの入力電流Jbと入力電流Jcの合計を減算することで算出する。   The control means 119 includes the total input current H of the inverter units 114a, 114b, and 114c detected by the total current detection circuit 115 for the input current K of the inverter circuit 114a that is one heating unit 120a not connected to the individual current detection circuit 117. Is calculated by subtracting the sum of the input current Jb and the input current Jc of the inverters 114b and 114c detected by the individual current detection circuits 117b and 117c.

算出したインバータ部114aの入力電流Kと電圧検出回路116で検出した電源電圧を演算することで、インバータ部114aの消費電力を算出する。また、インバータ114bの入力電流Jbと電源電圧を演算することでインバータ部114bの消費電力を算出する。インバータ114cの入力電流Jcと電源電圧を演算することでインバータ回路114cの消費電力を算出する。制御手段119はインバータ部114aのドライバ回路105aと106a、インバータ部114bのドライバ回路105bと106b、インバータ部114cのドライバ回路105cと106cに駆動信号を出力し、加熱部120毎に設定された消費電力となるように各インバータ部114の消費電力を制御する。   By calculating the calculated input current K of the inverter unit 114a and the power supply voltage detected by the voltage detection circuit 116, the power consumption of the inverter unit 114a is calculated. Further, the power consumption of the inverter unit 114b is calculated by calculating the input current Jb and the power supply voltage of the inverter 114b. The power consumption of the inverter circuit 114c is calculated by calculating the input current Jc and the power supply voltage of the inverter 114c. The control means 119 outputs drive signals to the driver circuits 105a and 106a of the inverter unit 114a, the driver circuits 105b and 106b of the inverter unit 114b, and the driver circuits 105c and 106c of the inverter unit 114c, and the power consumption set for each heating unit 120 The power consumption of each inverter unit 114 is controlled so that

本実施例は以上の構成からなり、次に電流検出回路および電圧検出回路の調整方法について図5の制御回路図と図6の調整作業の説明図を用いて説明する。   The present embodiment is configured as described above. Next, a method for adjusting the current detection circuit and the voltage detection circuit will be described with reference to the control circuit diagram of FIG. 5 and the adjustment diagram of FIG.

図6は、調整作業の説明図において、本体1に本体電源プラグ1aを介して電圧および電流を計測可能なパワーメータGを接続し、電源プラグG3を200Vに設定した安定化電源Eに接続する。パワーメータGには、電圧表示G1、電流表示G2を表示する。   FIG. 6 is an explanatory diagram of the adjustment work. A power meter G capable of measuring voltage and current is connected to the main body 1 via the main body power plug 1a, and the power plug G3 is connected to the stabilized power source E set to 200V. . The power meter G displays a voltage display G1 and a current display G2.

調整は、制御手段119に備える調整用のプログラムを走らせ、3口分の加熱コイルの消費電力を調整するものである。調整には、図4にて説明した上面操作部12の各入力キーを使用し、表示手段として上面表示部14を使用するもので、調整用のプログラムを走らせるための入力も上面操作部12の入力キーを特定の操作によって行うものである。もしくは前面操作部10を使用しても良い。   In the adjustment, an adjustment program provided in the control means 119 is run to adjust the power consumption of the three heating coils. For the adjustment, each input key of the upper surface operation unit 12 described with reference to FIG. 4 is used, and the upper surface display unit 14 is used as a display unit, and an input for running an adjustment program is also performed. The input key is performed by a specific operation. Alternatively, the front operation unit 10 may be used.

調整は、電圧検出回路116の電圧調整の1回と合計電流検出回路115の電流調整の1回と2個備える個別電流検出回路117の電流調節の2回、計4回である。   The adjustment is performed four times in total, that is, one time of voltage adjustment of the voltage detection circuit 116, one time of current adjustment of the total current detection circuit 115, and two times of current adjustment of the individual current detection circuit 117 provided.

初めに電圧検出回路116の電圧調整について説明する。   First, voltage adjustment of the voltage detection circuit 116 will be described.

電圧調整は、電圧検出回路116で検知している電圧値を、本体と接続している電圧表示G1に表示している電圧値であることを制御手段119に記憶させて検知電圧の値を調整する。調整は、商用交流電圧の入力値と電圧検出回路116による検知電圧値との関係を制御手段119においてソフト的に調整する。   In the voltage adjustment, the voltage value detected by the voltage detection circuit 116 is stored in the control means 119 to be the voltage value displayed on the voltage display G1 connected to the main body, and the value of the detected voltage is adjusted. To do. In the adjustment, the control means 119 softly adjusts the relationship between the input value of the commercial AC voltage and the detected voltage value by the voltage detection circuit 116.

次に、全ての加熱部120に入力される電流の検出を行う合計電流検出回路115の調整を行う。また合計電流検出回路115は、個別電流検出回路117を備えていない加熱部120aの駆動時の入力電流の検出に使用される。   Next, the total current detection circuit 115 that detects the current input to all the heating units 120 is adjusted. The total current detection circuit 115 is used to detect an input current when driving the heating unit 120a that does not include the individual current detection circuit 117.

電流調整は、加熱コイル5aの位置する鍋位置表示部4aに鍋を載置し、この鍋を特定の火力で加熱している時に、本体1と接続している電流表示G2に表示す電流値が例えば15Aを示すように加熱コイル5aの火力を調整し、電流表示G2に表示す電流値が15Aを示した時に調整を確定する。この調整で、調整確定時に合計電流検出回路115で検知している電流値が15Aと制御手段119は認識して検知誤差は調整される。   In the current adjustment, a pan is placed on the pan position display portion 4a where the heating coil 5a is located, and when the pan is heated with a specific heating power, the current value displayed on the current display G2 connected to the main body 1 For example, the heating power of the heating coil 5a is adjusted so as to indicate 15A, and the adjustment is determined when the current value displayed on the current display G2 indicates 15A. With this adjustment, the control means 119 recognizes that the current value detected by the total current detection circuit 115 when the adjustment is confirmed is 15 A, and the detection error is adjusted.

合計電流検出回路115の調整を経た後に引き続き2個の個別電流検出回路117の電流検知の誤差の調整を行う。   After the adjustment of the total current detection circuit 115, the current detection error of the two individual current detection circuits 117 is adjusted.

個別電流検出回路117bの電流検知の調整は、個別電流検出回路117bに接続されている加熱コイル5bの位置する鍋位置表示部4bに鍋を載置し、この鍋を特定の火力で加熱している時に、本体1と接続している電流表示G2に表示す電流値が例えば15Aを示すように加熱コイル5aの火力を調整し、電流表示G2に表示す電流値が15Aを示した時に調整を確定する。この調整で、調整確定時に個別電流検出回路117bで検知している電流値が15Aと制御手段119は認識して検知誤差は調整される。もし、この確定時に合計電流検出回路115で認識していた電流値と異なる場合、制御手段119は調整誤差と判断して、確定時に合計電流検出回路115で検知していた電流値を個別電流検出回路117bの検出している電流値と再調整される。この調整誤差を調整することで、設定を同じ火力にした時の加熱コイル5aと加熱コイル5bとの消費電力は略同じになる。   Adjustment of the current detection of the individual current detection circuit 117b is performed by placing a pan on the pan position display portion 4b where the heating coil 5b connected to the individual current detection circuit 117b is located, and heating the pan with a specific heating power. The heating power of the heating coil 5a is adjusted so that the current value displayed on the current display G2 connected to the main body 1 is, for example, 15A, and the adjustment is performed when the current value displayed on the current display G2 is 15A. Determine. With this adjustment, the control unit 119 recognizes that the current value detected by the individual current detection circuit 117b when the adjustment is confirmed is 15A, and the detection error is adjusted. If it is different from the current value recognized by the total current detection circuit 115 at the time of determination, the control means 119 determines an adjustment error, and the current value detected by the total current detection circuit 115 at the time of determination is detected as an individual current. The current value detected by the circuit 117b is readjusted. By adjusting this adjustment error, the power consumption of the heating coil 5a and the heating coil 5b when the setting is set to the same heating power becomes substantially the same.

同様に、個別電流検出回路117cの電流検知の調整も実施する。   Similarly, adjustment of current detection of the individual current detection circuit 117c is also performed.

また、前述した個別電流検出回路117の調整は、調整誤差の調整を含めて2回調整を行ったのに対して、異なる調整方法として、先に調整が終わった合計電流検出回路115の入力電流が例えば15Aを認識するように加熱コイル5aの火力を調整し、合計電流検出回路115で入力電流が15Aを認識したときに調整を確定し、この調整の確定時に個別電流検出回路117bで検出している電流値を15Aと制御手段119に認識させることで、個別電流検出回路117bの調整を終了する事ができる。この調整方法によって調整毎の誤差の発生も最小限に止める事が可能となる。   Further, the adjustment of the individual current detection circuit 117 described above is performed twice including adjustment of the adjustment error. However, as a different adjustment method, the input current of the total current detection circuit 115 that has been adjusted first is adjusted. For example, the heating power of the heating coil 5a is adjusted so as to recognize 15A, the adjustment is determined when the input current is recognized by the total current detection circuit 115, and the individual current detection circuit 117b detects when the adjustment is confirmed. The adjustment of the individual current detection circuit 117b can be completed by causing the control means 119 to recognize the current value 15A. With this adjustment method, it is possible to minimize the occurrence of errors for each adjustment.

このような回路構成と前述した調整をすることで、種々の部品のバラツキは有っても、ひとつの本体1に備えた組み状態として、全ての電流検出回路の検出誤差の値が等しくなり、其々の電流検出回路の検出する電流値が一定となる。どの加熱部120例えば右加熱部120aと左加熱部120aを等しい消費電力にすることができる。   By adjusting the circuit configuration and the above-described adjustment, even if there are variations in various parts, the detection error values of all the current detection circuits are equal in the assembled state provided in one main body 1, The current value detected by each current detection circuit is constant. Which heating unit 120, for example, the right heating unit 120a and the left heating unit 120a can have the same power consumption.

そのため、調理において右加熱部120aと左加熱部120aは、同じ火加減の操作で等しい消費電力を得ることができる。左右どの加熱部120でも同じ火加減で調理すると、同じ消費電力になるので、同じ火力が被加熱物に与えられて、同じように同じ要領で調理が可能となる。   Therefore, in cooking, the right heating unit 120a and the left heating unit 120a can obtain equal power consumption by the same heating operation. If cooking is performed with the same heating level in any of the left and right heating units 120, the same power is consumed, so that the same heating power is given to the object to be heated and cooking can be performed in the same manner.

例えば、使用者は、右加熱部120aで加熱中に、一つ鍋を追加して加熱するときに、右加熱部120aにあった鍋を左加熱部120bに移動して、別の鍋を右加熱部120aに載せて加熱する。そのときに、右加熱部120aで設定していた火加減と同じに左加熱部120bを設定すると、左加熱部120bは右加熱部120aと同じ火力が得られるので、右加熱部120aで連続して加熱していたと同じ加熱ができ、調理の出来栄えが損なわれることなく、使用者の使い勝手がよい。   For example, when a user adds one pan and heats it while heating with the right heating unit 120a, the user moves the pan that was in the right heating unit 120a to the left heating unit 120b and moves another pan to the right. Heat on the heating section 120a. At that time, if the left heating unit 120b is set in the same manner as the heating control set in the right heating unit 120a, the left heating unit 120b can obtain the same thermal power as the right heating unit 120a, and therefore the right heating unit 120a continuously. It can be heated in the same way as it is heated, and the user-friendliness is good without losing the quality of cooking.

左、右の加熱部のみに限定することはなく、中央も含めて、3口の加熱部で同じ消費電力としたものでもよい。   The power consumption is not limited to the left and right heating units, and may be the same power consumption in the three heating units including the center.

5 加熱コイル
20 操作表示部
102 整流回路
114 インバータ部(インバータ手段)
115 合計電流検出回路
117 個別電流検出回路
119 制御手段
120 加熱部
5 Heating coil 20 Operation display unit 102 Rectifier circuit 114 Inverter unit (inverter means)
115 Total Current Detection Circuit 117 Individual Current Detection Circuit 119 Control Unit 120 Heating Unit

Claims (1)

負荷を誘導加熱する加熱コイルと該加熱コイルへ電力を供給するインバータ部とで生成する複数の加熱部と、
該複数の加熱部へ供給する電源を生成する整流回路と、
前記加熱部の合計の入力電流を検出できる合計電流検出回路と、
該合計電流検出回路と直列に接続し前記加熱部の入力電流を検知する個別電流検出回路と、
前記合計電流検出回路と前記個別電流検出回路とで検出した電流に応じて前記インバータ部を制御して前記加熱コイルの電力を制御する制御手段とを備え、
該制御手段は、前記個別電流検出回路の電流検知の調整に前記合計電流検出回路の検知結果を用いることを特徴とする誘導加熱調理器。
A plurality of heating units generated by a heating coil for induction heating the load and an inverter unit for supplying power to the heating coil;
A rectifier circuit that generates power to be supplied to the plurality of heating units;
A total current detection circuit capable of detecting a total input current of the heating unit;
An individual current detection circuit connected in series with the total current detection circuit to detect an input current of the heating unit;
Control means for controlling the power of the heating coil by controlling the inverter unit according to the current detected by the total current detection circuit and the individual current detection circuit;
The induction heating cooker, wherein the control means uses a detection result of the total current detection circuit for adjustment of current detection of the individual current detection circuit.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196156A (en) * 2000-01-12 2001-07-19 Hitachi Hometec Ltd Induction cooker
JP2012104421A (en) * 2010-11-11 2012-05-31 Mitsubishi Electric Corp Induction heating cooker
JP2013131307A (en) * 2011-12-20 2013-07-04 Panasonic Corp Induction heating apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196156A (en) * 2000-01-12 2001-07-19 Hitachi Hometec Ltd Induction cooker
JP2012104421A (en) * 2010-11-11 2012-05-31 Mitsubishi Electric Corp Induction heating cooker
JP2013131307A (en) * 2011-12-20 2013-07-04 Panasonic Corp Induction heating apparatus

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