JP2007005071A - Electromagnetic induction heating cooker - Google Patents

Electromagnetic induction heating cooker Download PDF

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JP2007005071A
JP2007005071A JP2005182003A JP2005182003A JP2007005071A JP 2007005071 A JP2007005071 A JP 2007005071A JP 2005182003 A JP2005182003 A JP 2005182003A JP 2005182003 A JP2005182003 A JP 2005182003A JP 2007005071 A JP2007005071 A JP 2007005071A
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pan
induction heating
pot
outer peripheral
coil
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JP4825458B2 (en
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Toru Sasaki
透 佐々木
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Yoshinoya D & C Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To cook in a short time without heating unevenness from a central part of a pot bottom to a pot sidewall by reducing energy loss even when using a minor diameter pot while it is simple thin structure. <P>SOLUTION: An inner circumference coil part 2a which is spirally wound is arranged facing the central part P1 of the pot bottom mounted on a prescribed position on a top plate 1 so that a coil inner circumference end 2d approaches to a central side in a diameter direction, and sufficient Joule heat is generated in the central part P1 of the pot bottom by a high-frequency magnetic field generated from there. When a pot P with a diameter smaller than an outer diameter of the outer periphery coil part 2b is used, a circular magnetic-flux guidance part 3 is provided in an outer circumferential surface of a pot sidewall P3 to approach the outer periphery coil part 2b spirally wound continuously with the outer periphery end of the inner circumference coil part 2a sandwiching a single or a plurality of circular spaces S outside of the inner circumference coil part 2a. Thereby, the magnetic leakage flux leaking outside without interlinking with the pot P and not contributing to heating is caught to be converted into Joule heat by the pot sidewall P3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えば業務用厨房などの限られたスペースに設置されて、主に所定サイズの鍋(調理容器)を使用する電磁誘導加熱(IH)調理器に関する。
詳しくは、鍋が載置されるトッププレートと、このトッププレートの下方に配設される渦巻状に巻いた誘導加熱コイルとを備えた電磁誘導加熱調理器に関する。
The present invention relates to an electromagnetic induction heating (IH) cooker that is installed in a limited space such as a commercial kitchen and mainly uses a pan (cooking vessel) of a predetermined size.
More specifically, the present invention relates to an electromagnetic induction heating cooker including a top plate on which a pan is placed and a spiral induction heating coil disposed below the top plate.

従来、この種の電磁誘導加熱調理器として、外径の異なる複数の誘導加熱コイル(加熱コイル)を、略同一平面に中心を略同じくして設置し、これら複数の誘導加熱コイルと鍋との磁気結合度の小さい誘導加熱コイルには通電しない構成とすることで、鍋底の小さな鍋を使用した場合にも、鍋と鎖交せず加熱に寄与しない漏洩磁束を低減して、加熱効率の向上を図ったものがある(例えば、特許文献1参照)。
また、内外に配置された第1の誘導加熱コイル及び第2の誘導加熱コイルに流れるインバータ回路の出力電流を制御する通電制御手段と、インバータ回路から通電制御手段を介して二つの誘導加熱コイルに流れる高周波電流を検出する電流検出器と、通電制御手段やインバータ回路の動作を制御する制御回路を設け、通電制御手段の動作を制御すると共に電流検出器の検出電流に基づいて鍋のサイズを判別する鍋サイズ判別手段を設けることにより、鍋の径サイズを判別して、小径な鍋を誘導加熱する際に第2の誘導加熱コイルから発生する高周波磁界の漏れを防止鍋内の調理物を適切に加熱調理するものもある(例えば、特許文献2参照)。
Conventionally, as this type of electromagnetic induction heating cooker, a plurality of induction heating coils (heating coils) having different outer diameters are installed in substantially the same plane with the center being substantially the same, and the plurality of induction heating coils and the pan By adopting a configuration that does not energize the induction heating coil with a small magnetic coupling degree, even when a pan with a small pan bottom is used, the leakage magnetic flux that does not contribute to heating without interlinking with the pan is reduced, and heating efficiency is improved. (For example, refer to Patent Document 1).
In addition, the energization control means for controlling the output current of the inverter circuit flowing through the first induction heating coil and the second induction heating coil arranged inside and outside, and two induction heating coils from the inverter circuit via the energization control means A current detector that detects the flowing high-frequency current and a control circuit that controls the operation of the energization control means and the inverter circuit are provided to control the operation of the energization control means and determine the size of the pan based on the current detected by the current detector Providing a pan size discriminating means that discriminates the diameter size of the pan and prevents leakage of high-frequency magnetic fields generated from the second induction heating coil when induction heating a small-diameter pan. There is also what cooks by heating (for example, refer patent document 2).

特開2003−77629号公報(第1−3頁、図1−4,8)Japanese Patent Laying-Open No. 2003-77629 (page 1-3, FIGS. 1-4, 8) 特開2003−249339号公報(第1−6頁、図1,3)JP 2003-249339 A (page 1-6, FIGS. 1 and 3)

しかし乍ら、このような従来の電磁誘導加熱調理器では、外径が異なる複数の誘導加熱コイル加熱を分割して個別に通電制御するため、同じ太さの導線(素線)を単一の渦巻状に巻いた誘導加熱コイルと比べると、内外2つの誘導加熱コイルに夫々巻かれる導線の長さが短くなって巻数も減少するから、必然的に内外の誘導加熱コイルから発生する高周波磁界(磁力線)も弱くなり、その分だけ鍋に発生するジュール熱が減少して加熱効率に劣るという問題があった。
更に、誘導加熱コイルの数が増えるために、調理器全体の構造が複雑化すると共に、誘導加熱コイルの通電制御も複雑化してコストアップになるという問題があった。
また、特許文献2の場合には、インバーター回路などを組み込むと調理器全体の厚さ寸法が大きくなるため、調理器の設置箇所が業務用厨房において例えば業務用冷蔵庫の上などのような通常の設置位置より高い場合には、身長の低い作業員にとってトッププレートが高くなり過ぎて、作業能率が悪いだけでなく調理ミスや事故がする恐れもあるという問題があった。
However, in such a conventional electromagnetic induction heating cooker, since a plurality of induction heating coil heatings having different outer diameters are divided and individually energized and controlled, a single conductor (element wire) of the same thickness is used. Compared with a spirally wound induction heating coil, the length of the conductive wire wound around each of the inner and outer induction heating coils is shortened and the number of turns is reduced, so that a high-frequency magnetic field generated from the inner and outer induction heating coils (inevitably) Magnetic field lines) are also weakened, and there is a problem that Joule heat generated in the pan is reduced by that amount, resulting in poor heating efficiency.
Furthermore, since the number of induction heating coils increases, there is a problem that the structure of the entire cooker becomes complicated, and energization control of the induction heating coil becomes complicated, resulting in an increase in cost.
In addition, in the case of Patent Document 2, since the thickness dimension of the entire cooking device increases when an inverter circuit or the like is incorporated, the installation location of the cooking device is a normal one such as on a commercial refrigerator. When the position is higher than the installation position, the top plate becomes too high for a worker with a short height, which causes not only poor work efficiency but also a risk of cooking errors and accidents.

本発明のうち請求項1記載の発明は、薄型の簡単な構造でありながら小径な鍋を使った時でもエネルギー損失を減らして鍋底中心部から鍋側壁まで加熱ムラなく短時間で調理することを目的としたものである。
請求項2記載の発明は、請求項1に記載の発明の目的に加えて、トッププレート側に何ら手を加えることなく加熱に寄与しない漏洩磁束を確実に捕捉してエネルギー損失を減らすことを目的としたものである。
The invention according to claim 1 of the present invention is to cook in a short time without heating unevenness from the center of the pan bottom to the side wall of the pan by reducing energy loss even when using a small-sized pan while having a thin and simple structure. It is intended.
In addition to the object of the invention described in claim 1, the invention described in claim 2 aims to reduce the energy loss by reliably capturing the leakage magnetic flux that does not contribute to heating without any effort on the top plate side. It is what.

前述した目的を達成するために、本発明のうち請求項1記載の発明は、誘導加熱コイルを、トッププレート上の所定位置に載置された鍋の鍋底中心部と対向して渦巻状に巻かれた内周コイル部と、その外側に環状隙間を挟んで該内周コイル部の外周端と連続して渦巻状に巻かれた外周コイル部とで構成し、この外周コイル部の外径よりも小径な鍋の側壁の外周面には、環状の磁束誘導部を上記外周コイル部と接近するように設けたことを特徴とするものである。
請求項2記載の発明は、請求項1記載の発明の構成に、前記鍋の側壁に環状の磁束誘導部を一体形成した構成を加えたことを特徴とする。
In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is such that the induction heating coil is wound in a spiral shape so as to face the center of the pan bottom of the pan placed at a predetermined position on the top plate. The outer peripheral coil portion and the outer peripheral coil portion wound continuously in a spiral manner with the outer peripheral end of the inner peripheral coil portion sandwiching an annular gap on the outer side thereof, and from the outer diameter of the outer peripheral coil portion Further, an annular magnetic flux guiding portion is provided on the outer peripheral surface of the side wall of the small-diameter pan so as to approach the outer peripheral coil portion.
The invention according to claim 2 is characterized in that a structure in which an annular magnetic flux guiding part is integrally formed on the side wall of the pan is added to the structure of the invention according to claim 1.

本発明のうち請求項1記載の発明は、トッププレート上の所定位置に載置された鍋底中心部と対向して渦巻状に巻かれた内周コイル部を配置することにより、コイル内周端が径方向中心側へ寄って、そこから発生した高周波磁界で鍋底中心部にも十分なジュール熱が発生し、更に外周コイル部の外径よりも小径な鍋の使用時には、その鍋側壁の外周面に環状の磁束誘導部を、上記内周コイル部の外側に単数又は複数の環状隙間を挟んで該内周コイル部の外周端と連続して渦巻状に巻かれた外周コイル部と接近するように設けることにより、鍋と鎖交せずに外側へ漏れて加熱に寄与しない漏洩磁束が捕捉され、該鍋側壁でジュール熱に変換される。
従って、薄型の簡単な構造でありながら小径な鍋を使った時でもエネルギー損失を減らして鍋底中心部から鍋側壁まで加熱ムラなく短時間で調理することができる。
その結果、外径が異なる複数の誘導加熱コイル加熱を分割して個別に通電制御する従来のものに比べ、既製の調理器と同じ太さで長さの導線を渦巻状に巻くため、大幅な改造とならず、定格電圧(定格出力)を変えることなく加熱効率を向上できるから、製造コストの低減化が図れる。
更に、インバーター回路などを組み込むことで全体の厚さ寸法が大きくなる従来のものに比べ、薄型であるため、調理器の設置箇所が業務用厨房において例えば業務用冷蔵庫の上などのような通常の設置位置より高い場合でも、作業員の身長などに関係なくトッププレートの設置位置が高くなり過ぎず、作業能率が良く調理ミスや事故の発生も防止できる。
また、漏洩磁束を低減するためにトッププレートの上に鍋以外は何も配備する必要がないからトッププレート表面が常時フラットであり、調理時以外には即座に他の作業に利用できる。
The invention according to claim 1 of the present invention is such that an inner peripheral coil portion wound in a spiral shape is disposed so as to face a pan bottom center portion placed at a predetermined position on the top plate. When a pan with a diameter smaller than the outer diameter of the outer peripheral coil portion is used, the outer periphery of the pan side wall An annular magnetic flux guiding portion is formed on the surface, and the outer peripheral coil portion is wound spirally continuously with the outer peripheral end of the inner peripheral coil portion with one or more annular gaps outside the inner peripheral coil portion. By providing in this way, the leakage magnetic flux which leaks outside without interlinking with the pan and does not contribute to heating is captured and converted into Joule heat at the pan side wall.
Therefore, even when using a small-sized pan with a thin and simple structure, energy loss can be reduced and cooking can be performed in a short time without uneven heating from the center of the pan bottom to the side wall of the pan.
As a result, compared to the conventional one that divides a plurality of induction heating coil heatings with different outer diameters and individually controls energization, the conductor is wound in a spiral shape with the same thickness as the ready-made cooker. Since the heating efficiency can be improved without modifying the rated voltage (rated output), the manufacturing cost can be reduced.
In addition, since the overall thickness is increased by incorporating an inverter circuit, etc., it is thinner, so the location where the cooking device is installed is a normal one in a commercial kitchen such as on a commercial refrigerator. Even if it is higher than the installation position, the installation position of the top plate does not become too high regardless of the height of the worker, etc., and the work efficiency is good and the occurrence of cooking mistakes and accidents can be prevented.
Moreover, since it is not necessary to arrange anything other than the pan on the top plate in order to reduce the leakage magnetic flux, the surface of the top plate is always flat and can be used immediately for other operations except during cooking.

請求項2の発明は、請求項1の発明の効果に加えて、鍋の側壁に環状の磁束誘導部を一体形成することにより、鍋に対して磁束誘導部が位置ズレしないと共に、鍋をトッププレート上の適正位置に置くだけで磁束誘導部が適正位置にセットされる。
従って、トッププレート側に何ら手を加えることなく加熱に寄与しない漏洩磁束を確実に捕捉してエネルギー損失を減らすことができる。
In addition to the effect of the invention of claim 1, the invention of claim 2 is formed by integrally forming an annular magnetic flux guide portion on the side wall of the pan, so that the magnetic flux guide portion is not misaligned with respect to the pan, and the pan is at the top. Simply placing the magnetic flux guide at the appropriate position on the plate sets the magnetic flux guide to the proper position.
Therefore, it is possible to reliably capture the leakage magnetic flux that does not contribute to heating without any effort on the top plate side and reduce energy loss.

本発明の電磁誘導加熱調理器Aは、図1(a)(b)に示す如く、鍋(調理容器)Pが載置されるトッププレート1と、このトッププレート1の下方に配設される渦巻状に巻いた誘導加熱コイル2とを備え、この誘導加熱コイル2に高周波電流を供給して高周波磁界(磁力線)mを発生し、この高周波磁界mによって鍋Pに渦電流を生じさせ、これら鍋Pの固定抵抗と渦電流により発生するジュール熱で加熱調理するものである。   As shown in FIGS. 1A and 1B, the electromagnetic induction heating cooker A of the present invention is disposed on a top plate 1 on which a pan (cooking container) P is placed and below the top plate 1. An induction heating coil 2 wound in a spiral shape, a high frequency current is supplied to the induction heating coil 2 to generate a high frequency magnetic field (line of magnetic force) m, and an eddy current is generated in the pan P by the high frequency magnetic field m. It is cooked by Joule heat generated by the fixed resistance and eddy current of the pan P.

上記誘導加熱コイル2は、トッププレート1上の所定位置に載置された鍋Pの鍋底中心部P1と対向して渦巻状に巻かれた内周コイル部2aと、その外側に単数又は複数の環状隙間Sを挟んで該内周コイル部2aの外周端と連続して渦巻状に巻かれた外周コイル部2bとからなる。   The induction heating coil 2 includes an inner peripheral coil portion 2a wound in a spiral shape so as to face the pan bottom center portion P1 of the pan P placed at a predetermined position on the top plate 1, and a single or plural outer coils 2a. The outer peripheral coil portion 2b is wound in a spiral shape continuously with the outer peripheral end of the inner peripheral coil portion 2a with the annular gap S interposed therebetween.

これら内周コイル部2a及び外周コイル部2bは、1本の同じ太さに形成した導線(素線)2cが、上記環状隙間Sを挟んで夫々異なる径で同じ方向へ巻回されており、その両端子を高周波電源ユニット(図示せず)に導通接続し、この高周波電源ユニットから高周波電流を供給することにより、内周コイル部2aと外周コイル部2bに内外2つの高周波磁界mが発生するようにしている。   In the inner coil portion 2a and the outer coil portion 2b, one conductor wire (element wire) 2c having the same thickness is wound in the same direction with different diameters with the annular gap S interposed therebetween, Both terminals are electrically connected to a high-frequency power supply unit (not shown), and a high-frequency current is supplied from the high-frequency power supply unit, whereby two internal and external high-frequency magnetic fields m are generated in the inner peripheral coil portion 2a and the outer peripheral coil portion 2b. I am doing so.

また、上記内周コイル部2a及び外周コイル部2bの下方には、図示せぬが、例えばフェライトなどの磁性材料からなる環状体を配置し、内周コイル部2aの内側にはフェライトなどの磁性材料からなる筒状体を配置して、これら環状体及び筒状体が協働して磁路を形成するようにすることも可能である。   Although not shown, an annular body made of a magnetic material such as ferrite is disposed below the inner and outer coil portions 2a and 2b, and a magnetic material such as ferrite is disposed inside the inner coil portion 2a. It is also possible to arrange a cylindrical body made of a material so that the annular body and the cylindrical body cooperate to form a magnetic path.

そして、この外周コイル部2bの外径よりも小さな鍋Pを使う場合には、この小径な鍋Pの鍋底外周部P2及び側壁P3と、該外周コイル部2bとが対向するように配置することにより、その鍋底中心部P1及び鍋底外周部P2に誘導される渦電流の分布を分散させて、特に鍋底中心部P1における加熱ムラが低減されるようにしている。   And when using the pot P smaller than the outer diameter of this outer periphery coil part 2b, arrange | position so that this pot outer periphery part P2 and side wall P3 of this small diameter pot P may oppose this outer periphery coil part 2b. Thus, the distribution of eddy currents induced in the pan bottom center portion P1 and the pan bottom outer peripheral portion P2 is dispersed, and in particular, heating unevenness in the pan bottom center portion P1 is reduced.

更に、この小径な鍋Pの側壁P3の外周面には、磁性材料からなる環状の磁束誘導部3を上記外周コイル部2bと接近するように設けることにより、この外周コイル部2bから小径な鍋Pの外側へ漏れて加熱に寄与しない高周波磁束、つまり漏洩磁束が該磁束誘導部3を介して外周コイル部2bへ戻るようにしている。
以下、本発明の一実施例を図面に基づいて説明する。
Further, an annular magnetic flux guiding portion 3 made of a magnetic material is provided on the outer peripheral surface of the side wall P3 of the small-diameter pan P so as to be close to the outer peripheral coil portion 2b. A high-frequency magnetic flux that leaks to the outside of P and does not contribute to heating, that is, a leakage magnetic flux returns to the outer peripheral coil portion 2b via the magnetic flux guiding portion 3.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

この実施例1は、図1(a)(b)に示す如く、本発明の電磁誘導加熱調理器Aが、業務用厨房において例えば業務用冷蔵庫やキャビネットなどの置き台X上に載置する据置タイプであり、前記誘導加熱コイル2の内周コイル部2aと外周コイル部2bとが1つの環状隙間Sを挟んで配置され、前記鍋Pの側壁P3に環状の磁束誘導部3が一体形成された場合を示すものである。   In the first embodiment, as shown in FIGS. 1A and 1B, the electromagnetic induction heating cooker A of the present invention is placed on a table X such as a commercial refrigerator or cabinet in a commercial kitchen. The inner coil portion 2a and the outer coil portion 2b of the induction heating coil 2 are arranged with one annular gap S therebetween, and the annular magnetic flux guide portion 3 is integrally formed on the side wall P3 of the pan P. This shows the case.

上記鍋Pは、磁性材料を含むステンレスやアルミニウムなどの複数層構造か又はその内面全体にフッ素樹脂加工を施した多層構造であり、必要に応じて一定温度以上にまで温度上昇すると磁性を失う整磁合金が積層されるようにするとも可能である。   The pan P is a multi-layered structure such as stainless steel or aluminum containing a magnetic material or a multi-layered structure in which the entire inner surface is processed with a fluororesin, and loses magnetism when the temperature rises to a certain temperature or more as required. It is also possible to stack magnetic alloys.

図示例では図1(b)に示す如く、小径な鍋Pが親子丼やカツ丼の具を卵でとじるための浅い丼鍋や小型のフライパンなどであり、その磁性材料が含まれた周縁を外側に折り返して、上記外周コイル部2bへ向け突出させることにより、該鍋側壁P3の外縁に環状の磁束誘導部3を一体に突設している。   In the illustrated example, as shown in FIG. 1 (b), the small-diameter pan P is a shallow rice pan or a small frying pan for binding the ingredients of the parent and child rice bowl or the cutlet rice bowl with an egg. The annular magnetic flux guiding portion 3 is integrally projected on the outer edge of the pan side wall P3 by folding outward and projecting toward the outer peripheral coil portion 2b.

更に、上記鍋Pの形状が変われば、磁束誘導部3の形成方法も変化する。
鍋Pが例えば深い両手鍋や片手鍋か又は磁性材料が含まれた土鍋などである場合には、図示せぬが、その側壁P3の外周面に沿って、別途形成された環状の磁束誘導部3を、上記外周コイル部2bと接近するように固着するなどして一体的に設けるか、或いは着脱自在に取り付けることも可能である。
Furthermore, if the shape of the pan P changes, the method of forming the magnetic flux guiding portion 3 also changes.
When the pan P is, for example, a deep two-handed pan, a one-handed pan, or an earthen pan containing a magnetic material, an annular magnetic flux guiding portion formed separately along the outer peripheral surface of the side wall P3 is not shown. 3 can be integrally provided by being fixed so as to be close to the outer peripheral coil portion 2b, or can be detachably attached.

また図示例では図1(a)に示す如く、前記トッププレート1と隣り合う操作部4に、、スタートキー4a、電源切りスイッチ4b、レシピに合わせて自動的に出力を調節する時間設定スイッチ4c、出力調整用手動スイッチとして強スイッチ4d、中スイッチ4e、弱スイッチ4fを備えると共に、制御回路には、例えば玉子を入れるタイミング時や調理完成時に告知をする告知機能や、予め設定された調理時間に到達すると告知して自動的にスイッチを切る自動スイッチOFF機能などが組み込まれている。   In the illustrated example, as shown in FIG. 1 (a), the operation key 4 adjacent to the top plate 1 has a start key 4a, a power-off switch 4b, and a time setting switch 4c that automatically adjusts the output according to the recipe. The output control manual switch includes a strong switch 4d, a middle switch 4e, and a weak switch 4f, and the control circuit has a notification function for notifying, for example, when the egg is added or when cooking is completed, or a preset cooking time. An automatic switch-off function that automatically turns off the switch when it is reached is built in.

次に、斯かる電磁誘導加熱調理器Aにおいて上述した小径な鍋Pを使用した場合の作用効果について説明する。   Next, the effect at the time of using the small diameter pan P mentioned above in such an electromagnetic induction heating cooking appliance A is demonstrated.

先ず、トッププレート1上の所定位置に載置された鍋Pの鍋底中心部P1と対向するように内周コイル部2aを配置したことで、従来の導線を単一の渦巻状に巻いた誘導加熱コイルに比べ、環状隙間Sの分だけコイル内周端2dが径方向中心側へ寄って、そこから発生した高周波磁界で鍋底中心部P1にも十分なジュール熱が発生する。   First, the induction | guidance | derivation which wound the conventional conducting wire in the single spiral shape by having arrange | positioned the inner peripheral coil part 2a so that the pan bottom center part P1 of the pan P mounted in the predetermined position on the top plate 1 may be opposed. Compared to the heating coil, the inner peripheral edge 2d of the coil approaches the radial center by the amount of the annular gap S, and sufficient Joule heat is generated also in the pan bottom center portion P1 by the high-frequency magnetic field generated therefrom.

それにより、鍋底中心部P1から鍋側壁P3まで加熱ムラを低減して、鍋Pの温度分布が略均一化される。
従って、良好な調理が行えると共に、鍋Pに施されたフッ素樹脂を傷めない。
Thereby, a heating nonuniformity is reduced from the pot bottom center part P1 to the pot side wall P3, and the temperature distribution of the pot P is made substantially uniform.
Therefore, good cooking can be performed and the fluororesin applied to the pan P is not damaged.

これと同時に、鍋側壁P3の外周面に環状の磁束誘導部3を外周コイル部2bと接近するように設けたことで、鍋Pと鎖交せずに外側へ漏れて加熱に寄与しない漏洩磁束が捕捉され、該鍋側壁P3でジュール熱に変換される。
それにより、エネルギー損失を減らして加熱効率が向上する。
At the same time, an annular magnetic flux guiding portion 3 is provided on the outer peripheral surface of the pan side wall P3 so as to approach the outer peripheral coil portion 2b, thereby leaking to the outside without interlinking with the pan P and contributing to heating. Is captured and converted into Joule heat at the pan side wall P3.
Thereby, energy loss is reduced and heating efficiency is improved.

このような作用効果を確認するため、従来の導線を単一の渦巻状に巻いた誘導加熱コイルを備えた電磁誘導加熱調理器と、本発明の電磁誘導加熱調理器Aを、夫々同じ定格電圧2000Vにして、親子丼の卵とじを完成させるために要した調理時間で計測する実験を行った。   In order to confirm such an effect, the electromagnetic induction heating cooker provided with the induction heating coil which wound the conventional conducting wire into a single spiral and the electromagnetic induction heating cooker A of the present invention have the same rated voltage. An experiment was conducted in which the measurement was performed at 2000 V and the cooking time required to complete the egg binding of the oyakodon.

実験の結果、従来の導線を単一の渦巻状に巻いた誘導加熱コイルでは、約1分30秒かかり、しかも加熱ムラが大きくて仕上がりが悪かったのに対し、本発明の電磁誘導加熱調理器Aでは約47〜57秒でも加熱ムラのない満足できる仕上がりが得られた。
直径17cmの鍋Pでも約1.8kW以上の出力を得ることができた。
As a result of the experiment, the induction heating coil in which the conventional conductive wire is wound in a single spiral shape takes about 1 minute and 30 seconds, and the heating unevenness is large and the finish is poor, whereas the electromagnetic induction heating cooker of the present invention In A, a satisfactory finish without heating unevenness was obtained even in about 47 to 57 seconds.
Even with a pot P having a diameter of 17 cm, an output of about 1.8 kW or more could be obtained.

この結果から、定格電圧(定格出力)を変えなくても、誘導加熱コイル2の改造と専用鍋Pの形状変更を行っただけで、インバータ回路を使わずに調理器全体の薄型を維持しながら、加熱ムラを大幅に低減できる共にエネルギー損失を減らして調理時間を大幅に短縮できた。
特に、予め決められたメニューを短時間で数多く調理する必要がある業務用厨房に有効であることが解った。
From this result, even if the rated voltage (rated output) is not changed, only the induction heating coil 2 is modified and the shape of the dedicated pan P is changed, and the overall thickness of the cooker is maintained without using the inverter circuit. In addition to greatly reducing unevenness in heating, energy consumption was reduced and cooking time was greatly shortened.
In particular, it has been found that this is effective for commercial kitchens where a large number of predetermined menus need to be cooked in a short time.

また、外周コイル部2bから鍋Pの外側へ漏れて加熱に寄与しない漏洩磁束を低減するためにトッププレート1の上に鍋P以外は何も配備する必要がないから、該トッププレート1の表面が常時フラットであり、この表面を調理時以外は即座に他の作業に利用できる。   Moreover, since it is not necessary to arrange anything other than the pan P on the top plate 1 in order to reduce the leakage magnetic flux that leaks from the outer peripheral coil portion 2b to the outside of the pan P and does not contribute to heating, the surface of the top plate 1 Is always flat, and this surface can be used immediately for other operations except during cooking.

更に、本実施例の場合には、鍋Pの側壁P3に環状の磁束誘導部3を一体形成したため、鍋Pに対して磁束誘導部3が位置ズレしないと共に、鍋Pをトッププレート1上の適正位置に置くだけで磁束誘導部3も適正位置にセットされる。
それにより、トッププレート1側に何ら手を加えることなく加熱に寄与しない漏洩磁束を確実に捕捉してエネルギー損失を減らし、加熱効率の向上が図れる。
Furthermore, in the case of the present embodiment, since the annular magnetic flux guiding portion 3 is integrally formed on the side wall P3 of the pan P, the magnetic flux guiding portion 3 is not displaced with respect to the pan P, and the pan P is placed on the top plate 1. The magnetic flux guide 3 is also set at an appropriate position simply by being placed at an appropriate position.
Accordingly, the leakage magnetic flux that does not contribute to heating can be reliably captured without any effort on the top plate 1 side, energy loss can be reduced, and heating efficiency can be improved.

尚、前示実施例では、本発明の電磁誘導加熱調理器Aが、業務用厨房において例えば業務用冷蔵庫やキャビネットなどの置き台X上に載置する据置タイプである場合を示したが、これに限定されず、ビルトインタイプであっても良い。
更に、電磁誘導加熱調理器Aの形状及び鍋Pの形状は図示例に限定されず、上述した機能を持っていれば、他の形状や構造であっても良い。
In the previous embodiment, the electromagnetic induction heating cooker A of the present invention is a stationary type that is placed on a table X such as a commercial refrigerator or cabinet in a commercial kitchen. It is not limited to, and may be a built-in type.
Furthermore, the shape of the electromagnetic induction heating cooker A and the shape of the pan P are not limited to the illustrated examples, and may have other shapes and structures as long as they have the functions described above.

本発明の電磁誘導加熱調理器の一実施例を示し、(a)が要部を部分的に切欠した平面図であり、(b)が要部を部分的に切欠した側面図である。One Example of the electromagnetic induction heating cooking appliance of this invention is shown, (a) is the top view which notched the principal part partially, (b) is the side view which partially cut off the principal part.

符号の説明Explanation of symbols

A 電磁誘導加熱調理器 m 高周波磁界(磁力線)
P 鍋 P1 鍋底中心部
P2 鍋底外周部 P3 側壁
S 環状隙間 X 置き台
1 トッププレート 2 誘導加熱コイル
2a 内周コイル部 2b 外周コイル部
2c 導線(素線) 2d コイル内周端
3 磁束誘導部 4 操作部
4a−4f 各種スイッチ
A Electromagnetic induction heating cooker m High frequency magnetic field (line of magnetic force)
P Pan P1 Pan bottom center P2 Pan bottom outer periphery P3 Side wall S Annular gap X Stand 1 Top plate 2 Induction heating coil 2a Inner coil portion 2b Outer coil portion 2c Conductor (element wire) 2d Coil inner periphery 3 Magnetic flux guide 4 Operation unit 4a-4f Various switches

Claims (2)

鍋(P)が載置されるトッププレート(1)と、このトッププレート(1)の下方に配設される誘導加熱コイル(2)とを備えた電磁誘導加熱調理器において、
前記誘導加熱コイル(2)を、トッププレート(1)上の所定位置に載置された鍋(P)の鍋底中心部(P1)と対向して渦巻状に巻かれた内周コイル部(2a)と、その外側に環状隙間(S)を挟んで該内周コイル部(2a)の外周端と連続して渦巻状に巻かれた外周コイル部(2b)とで構成し、この外周コイル部(2b)の外径よりも小径な鍋(P)の側壁(P3)の外周面には、環状の磁束誘導部(3)を上記外周コイル部(2b)と接近するように設けたことを特徴とする電磁誘導加熱調理器。
In an electromagnetic induction heating cooker including a top plate (1) on which a pan (P) is placed and an induction heating coil (2) disposed below the top plate (1),
An inner peripheral coil portion (2a) wound in a spiral manner with the induction heating coil (2) facing the pan bottom central portion (P1) of the pan (P) placed at a predetermined position on the top plate (1). ) And an outer peripheral coil portion (2b) wound in a spiral shape continuously with the outer peripheral end of the inner peripheral coil portion (2a) with an annular gap (S) interposed between the outer peripheral coil portion and the outer peripheral coil portion. On the outer peripheral surface of the side wall (P3) of the pan (P) having a smaller diameter than the outer diameter of (2b), an annular magnetic flux guiding part (3) is provided so as to approach the outer peripheral coil part (2b). Features an electromagnetic induction heating cooker.
前記鍋(P)の側壁(P3)に環状の磁束誘導部(3)を一体形成した請求項1記載の電磁誘導加熱調理器。 The electromagnetic induction heating cooker according to claim 1, wherein an annular magnetic flux induction portion (3) is integrally formed on the side wall (P3) of the pan (P).
JP2005182003A 2005-06-22 2005-06-22 Electromagnetic induction heating cooker Expired - Fee Related JP4825458B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07204087A (en) * 1994-01-18 1995-08-08 Hitachi Home Tec Ltd Heating container for electromagnetic cooker
JP2003100435A (en) * 2001-09-20 2003-04-04 Mitsubishi Electric Corp Induction-heating cooker
JP2004241285A (en) * 2003-02-07 2004-08-26 Daihen Corp Electromagnetic wave leakage preventing fixture for electromagnetic cooker, and cooking pan having the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07204087A (en) * 1994-01-18 1995-08-08 Hitachi Home Tec Ltd Heating container for electromagnetic cooker
JP2003100435A (en) * 2001-09-20 2003-04-04 Mitsubishi Electric Corp Induction-heating cooker
JP2004241285A (en) * 2003-02-07 2004-08-26 Daihen Corp Electromagnetic wave leakage preventing fixture for electromagnetic cooker, and cooking pan having the same

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