JP2004327260A

JP2004327260A - Heating cooker

Info

Publication number: JP2004327260A
Application number: JP2003120928A
Authority: JP
Inventors: Takeshi Saito; 毅齊藤
Original assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Priority date: 2003-04-25
Filing date: 2003-04-25
Publication date: 2004-11-18

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker capable of excellently carrying out cooking by electromagnetic induction heating and high frequency heating while suppressing its cost. <P>SOLUTION: This heating cooker is provided with a heating chamber 2 wherein an object 11 to be heated is stored, a high frequency heating means 9 disposed correspondingly to either one 2a of the peripheral walls of the heating chamber 2 to heat the object 11 to be heated by a high frequency, and an electromagnetic induction heating means 16 disposed correspondingly to either one 2c of the peripheral walls different from the peripheral wall 2a, to which the high frequency heating means 9 of the heating chamber 9 corresponds to, to apply electromagnetic induction heating to the object 11 to be heated. A layer member 8 to make magnetic flux from the electromagnetic induction heating means 16 permeate and to reflect the high frequency from the high frequency heating means 9 is provided on the peripheral wall 2c corresponding to the electromagnetic induction heating means 16 of the heating chamber 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、高周波加熱と電磁誘導加熱の調理が可能な加熱調理器に関するものである。
【０００２】
【従来の技術】
従来の電磁誘導加熱器付高周波加熱調理器は、高周波誘電加熱が行われる加熱庫の底面を、１０〜２５までのメッシュでかつ非磁性体からなり、２層の絶縁材料間に固着された金属網で構成し、金属網の下部に電磁誘導加熱用の電磁誘導コイルを配置したものである（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開平４−６５０９７号公報（第２−３頁、第１図）
【０００４】
【発明が解決しようとする課題】
上記のような従来の電磁誘導加熱器付高周波加熱調理器（加熱調理器）は、近年の食生活の多様化に対応し、高周波誘電加熱が行える調理器に電磁誘導加熱用の電磁誘導コイルを設けて、被加熱物に焼き目をつける等の焼き機能も行えるようになっている。しかしながら、従来の電磁誘導加熱器付高周波加熱調理器（加熱調理器）は、加熱ムラを改善するために、載置された被加熱物を回転させるターンテーブルを備えていたので、モータの駆動を伝えるこのターンテーブルのシャフトを貫通させる穴を、２層の絶縁材料間に固着された金属網、つまり加熱庫の底面のほぼ中心部に設けなければならなかった。そして、この穴から、被加熱物のカス、蒸気、水分などが金属網（加熱庫の底面）の下部に設けた電磁誘導コイル側に侵入してしまうことがあったため、金属網および電磁誘導コイルに錆や絶縁劣化を発生させてしまうという問題があった。また、金属網に設けられた穴から電磁誘導コイル側に高周波が漏れ出し、加熱庫の下部に設けられたセンサー等に影響を与えてしまって、センサーの誤動作を発生させてしまうという問題もあった。さらに、加熱庫の内側以外にでる電磁誘導コイルの磁力線の遮断が充分でないおそれがあったため、加熱調理器本体の底板およびその他の部品等が発熱してしまう可能性があるという問題もあった。また、金属網は２層の絶縁材料間に固着された構造となっていたので、製造性、組立性、歩留まり等が悪くなり、コストを高めてしまうという問題もあった。
【０００５】
本発明は、上記のような課題を解決するためになされたもので、コストを抑えて、電磁誘導加熱調理も高周波加熱調理も良好に行うことのできる加熱調理器を提供することを目的としたものである。
【０００６】
【課題を解決するための手段】
本発明に係る加熱調理器は、被加熱物が収容される加熱庫と、加熱庫の周壁のいずれか一つに対応して配設され、被加熱物を高周波により加熱する高周波加熱手段と、加熱庫の高周波加熱手段が対応した周壁とは別の周壁のいずれか一つに対応して配設され、被加熱物を電磁誘導加熱する電磁誘導加熱手段とを備え、加熱庫の電磁誘導加熱手段に対応した周壁に、電磁誘導加熱手段からの磁束を透過し、かつ高周波加熱手段からの高周波を反射する層部材を設けたものである。
【０００７】
【発明の実施の形態】
実施の形態１．
図１は本発明の実施の形態１の縦断面図である。図において、前面側に開口部を有する加熱調理器のほぼ箱状の本体１内に加熱庫２が形成され、加熱庫２の右側壁２ａに高周波の給電口３ａ，３ｂと温度検知用の開孔４が設けられており、左側壁２ｂに蒸気検知用の開孔５が設けられている。加熱庫２の底壁２ｃには開口部６が設けられ、その開口部６を覆いかつ加熱庫２の底壁２ｃを構成するセラミック等の誘電体からなる耐熱性の非磁性体によって形成された載置板７が加熱庫２の内側に配設されており、載置板７と底壁２ｃの間には、導電抵抗の低い例えば銅、アルミニウム、金および銀等の金属を含む膜状または薄板状の層部材８が設けられていて、層部材８は底壁２ｃの上面にシリコン接着剤などの接着剤により固着されている。なお、層部材８は底壁２ｃの下面側に固着させてもよく、蒸着、焼成または装着などによって形成してもよい。また、本体１の前面側には、ヒンジ部（図示せず）によって開閉自在に取り付けられ、閉塞時に加熱庫２の前面壁を構成するドア（図示せず）が設けられており、本体１の開口部を閉塞する。
【０００８】
加熱庫２の右側壁２ａの外側には、高周波を発振するマグネトロン９が設けられ、高周波は、導波管１０を介して給電口３ａ，３ｂに導かれ、給電口３ａ，３ｂから加熱庫２内に照射されて加熱庫２内の被加熱物１１を高周波加熱する。また、加熱庫２の上壁２ｄの外側には、被加熱物１１を輻射熱により加熱する上ヒータ１２が配設されており、上ヒータ１２の上部には上方への熱を断熱する断熱材１３が設けられ、上ヒータ１２および断熱材１３の下方以外を囲むように加熱庫２の上壁２ｄの上面に遮熱板１４が設けられている。なお、この実施の形態１では、上ヒータ１２をフラットタイプのものとしたが、高周波加熱時の高周波の漏洩等を考慮したものであれば、シーズヒータや管状ヒータなど、他の構成のヒータでもよい。
【０００９】
加熱庫２の底壁２ｃの外側には、コイルベース１５によって保持された誘導加熱コイル１６が設けられ、コイルベース１５を保持しながらコイルベース１５の上方以外を囲むように加熱庫２の底壁２ｃの下面にシールドケース１７が設けられている。そして、シールドケース１７は、本体１の外枠（例えば側面および底面など）を誘導加熱コイル１６によって電磁誘導加熱させないように遮蔽するために、例えばアルミニウムまたは銅等の導電抵抗の低い非磁性体で構成されており、シールドケース１７自身も電磁誘導加熱されないようになっている。また、被加熱物１１は、載置板７上に載置される調理皿１８に収容されて調理され、調理皿１８は、例えば熱やステンレス等の比較的導電抵抗の高い磁性体で構成され、誘導加熱コイル１６による電磁誘導加熱によって発熱する。なお、調理皿１８は、皿状に限らず、調理に適した鍋、フライパンおよびやかんなど、電磁誘導加熱によって発熱するものであれば形状は限定されない。また、高周波で調理を行う場合は調理皿１８を省略して載置板７に直接被加熱物１１を載置してもよい。
【００１０】
加熱庫２の右側壁２ａの外側には、開孔４に対応して被加熱物１１の温度を検出する非接触温度センサ１９が設けられ、加熱庫２の左側壁２ｂの外側には、開孔５に対応して被加熱物１１から放出される蒸気を検出する蒸気センサ２０が設けられている。そして、本体１内には、非接触温度センサ１９および蒸気センサ２０の検出結果に基づいて、マグネトロン９、上ヒータ１２および誘導加熱コイル１６などの駆動を制御し、加熱調理器の各種の加熱調理を制御する制御装置（図示せず）が設けられている。
【００１１】
このように構成された実施の形態１において、例えば高周波加熱調理を行う場合、まず、ドアを開いて加熱庫２内の載置板７上に調理皿１８に収容された被加熱物１１を載置し、ドアを閉める。ついで、本体１の前面側に設けられた操作部（図示せず）の高周波加熱調理機能を選択するレンジキーおよび調理時間を入力する時間キーなどを順次操作して設定し、さらにスタートキーを操作すると、制御装置は高周波加熱調理をスタートさせる。そして、制御装置は、マグネトロン９を駆動して高周波を発振させ、導波管１０を介して給電口３ａ，３ｂから加熱庫２内に高周波を照射させて被加熱物１１を加熱する。このとき、載置板７方向に放射された高周波は、載置板７の下面側に配設された層部材８によって反射され、加熱庫２内に放射される。
【００１２】
高周波により加熱された被加熱物１１は、表面温度が上昇するとともに蒸気を放出し、制御装置は、非接触温度センサ１９および蒸気センサ２０によって検出された被加熱物１１の温度および蒸気の検出結果に基づいて、マグネトロン９の駆動を制御し、被加熱物１１が所定の温度に温められると、マグネトロン９の駆動を停止して高周波加熱調理を終了させる。
【００１３】
また、例えば電磁誘導加熱調理を行う場合は、高周波加熱調理の場合と同様に、調理皿１８に収容された被加熱物１１を載置板７上に載置し、操作部の電磁誘導加熱調理機能を選択する電磁誘導加熱キーおよび調理時間を入力する時間キーなどを順次操作して設定し、さらにスタートキーを操作すると、制御装置は電磁誘導加熱調理をスタートさせる。そして、制御装置は、誘導加熱コイル１６を駆動して誘導加熱コイル１６からでる磁束によって調理皿１８に渦電流を発生させる。調理皿１８は、導電抵抗が高いので渦電流損としてジュール熱を発生し、電磁誘導加熱調理のエネルギーとなる。このとき、載置板７の下面側に配設された層部材８は、薄くかつ導電抵抗の低い金属によって構成されているので、渦電流損が低くジュール熱は発生しにくい。よって、磁束の大部分は層部材８を透過して載置板７上の調理皿１８に到達される。また、誘導加熱コイル１６は、コイルベース１５とともにシールドケース１７によって囲まれているので、本体１の外枠側に磁力線が及ぶのを防ぐ。
【００１４】
ジュール熱によって発熱した調理皿１８によって加熱された被加熱物１１は、表面温度が上昇するとともに蒸気を放出し、制御装置は、非接触温度センサ１９および蒸気センサ２０によって検出された被加熱物１１の温度および蒸気の検出結果に基づいて、誘導加熱コイル１６の駆動を制御し、被加熱物１１が所定の温度に加熱されると、誘導加熱コイル１６の駆動を停止して電磁誘導加熱調理を終了させる。
【００１５】
このように、加熱庫２の底壁２ｃを構成する載置板７の下面側に高周波を反射し、かつ誘導加熱コイル１６からの磁束を透過させる層部材８を設けたので、加熱庫２の底壁２ｃに従来のようにターンテーブルのシャフトを貫通させる穴を設ける必要がなく、被加熱物１１のカス、蒸気、水分などが誘導加熱コイル１６側に侵入してしまうおそれがなくなり、誘導加熱コイル１６の錆や絶縁劣化の発生を防ぐことができるととに、高周波による誘導加熱コイル１６への影響も防止できて、加熱調理器の長寿命化も図ることができる。さらに、加熱庫２の内側以外にでる誘導加熱コイル１６の磁力線を充分遮断することができ、本体１の底板およびその他の部品等の発熱も防ぐことができる。これにより、簡単な構造で高周波加熱調理と電磁誘導加熱調理の両方を行える複合型の加熱調理器をコストを抑えて得ることができる。また、高周波加熱調理と誘導誘導加熱調理とを瞬時に切り替えた交互加熱、あるいは、被加熱物１１の内部加熱と表面からの焼き調理の２つの加熱方式（高周波加熱と電磁誘導加熱）を同時に行う調理を、高効率および高火力で短時間に行うことができる使い勝手のよい加熱調理器を得ることができる。
【００１６】
実施の形態２．
図２は本発明の実施の形態２の縦断面図で、この実施の形態２は、実施の形態１に係る加熱調理器において、本体１内の加熱庫２の左側壁２ｂに設けられた凹部２１に、モータ２３によって回転して加熱庫２内の高周波を撹拌する撹拌手段であるスターラー２２を設けたもので、凹部２１には、凹部２１の開口面側と左側壁２ｂがほぼ同一平面状でかつスターラー２２を覆うように保護板２４が設けられている。この保護板２４は、マイカ板等の誘電体によって構成され、スターラー２２を加熱庫２内の汚れ等から保護している。なお、スターラー２２に代えて、他の電界を変化させる装置を設けてもよい。また、スターラー２２を給電口３ａ，３ｂが設けられた加熱庫２の右側壁２ａに対向する左側壁２ｂに設けたが、右側壁２ａまたは右側壁２ａの給電口３ａ，３ｂの近傍に設けてもよい。これらの場合、加熱庫２内の高周波と給電口３ａ，３ｂから供給される高周波を撹拌する。
【００１７】
このように構成された実施の形態２において、例えば高周波加熱調理を行う場合、実施の形態１で説明した場合と同様に加熱庫２内に調理皿１８に載置した被加熱物１１を収容し、操作部を操作して高周波加熱調理をスタートさせると、制御装置は、マグネトロン９を駆動して高周波を発振させ、加熱庫２内に照射させて被加熱物１１を加熱する。同時にモータ２３を駆動してスターラー２２を回転させて加熱庫２内の高周波を撹拌させ、加熱庫２内で乱反射させる。また、載置板７方向に放射された高周波は、載置板７の下面側に配設された層部材８によって反射され、加熱庫２内に放射される。そして、加熱庫２内で乱反射した高周波は被加熱物１１にムラなく当たる。
【００１８】
高周波により加熱された被加熱物１１は、表面温度が上昇するとともに蒸気を放出し、制御装置は、非接触温度センサ１９および蒸気センサ２０によって検出された被加熱物１１の温度および蒸気の検出結果に基づいて、マグネトロン９の駆動を制御し、被加熱物１１が所定の温度に温められると、マグネトロン９の駆動を停止して高周波加熱調理を終了させる。
なお、電磁誘導加熱調理を行う場合は、スターラー２２を回転させず、実施の形態１と同様に誘導加熱コイル１６を駆動して被加熱物１を電磁誘導加熱する。
【００１９】
このように、加熱庫２に高周波を撹拌するスターラー２２を設けたので、被加熱物１１に高周波をムラなく当てることができ、ターンテーブルを用いることなく加熱ムラのない高周波加熱調理を行うことができる。また、ターンテーブルを用いないので、被加熱物１１を加熱庫２の底壁２ｃ（載置板７）の中心に載置しない場合でも、乱反射した高周波によってムラなく加熱調理することができるとともに、ターンテーブルのシャフトを損傷させたりターンテーブルが傾いて回転しないなどの故障の発生を防ぐことができ、信頼性の高い加熱調理器を得ることができる。
【００２０】
実施の形態３．
図３は本発明の実施の形態３の要部の縦断面図で、この実施の形態３は、実施の形態１に係る加熱調理器において、コイルベース１５の下面１５ａからシールドケース１７の内底面１７ａまでの間隙Ｇが所定の間隔（ここでは２０ｍｍ）以上保持するように構成したものである。なお、誘導加熱コイル１６の下部からシールドケース１７の内底面１７ａまでの間隙を所定の間隔以上保持するように構成してもよい。
【００２１】
このように構成したことにより、実施の形態１とほぼ同じ作用および効果が得られるとともに、誘導加熱コイル１６の出力によるが、間隙Ｇを所定の間隔（２０ｍｍ）以上保持するようにしたことにより、本体１の外枠等への磁力線の影響を小さくすることができ、加熱庫２内の磁性体からなる調理皿１８以外の加熱を防止することができる。これにより、電磁誘導加熱調理における加熱効率の低下を防ぐことができる加熱調理器が得られる。
【００２２】
なお、上述の実施の形態１乃至３では、磁性体からなる調理皿１８に被加熱物１１を収容する場合を示したが、図４に示すように、調理皿１８Ａを非磁性体によって構成し、その調理皿１８Ａの内底面に磁性体からなる薄い板部材２５を載置または接合し、板部材２５上に被加熱物１１を載置するようにしてもよい。この場合も同様の効果を奏する。
また、実施の形態１に実施の形態３に係る発明を実施した場合を説明したが、実施の形態２に実施の形態３に係る発明を実施するようにしてもよい。この場合も同様の効果を奏する。
【００２３】
【発明の効果】
本発明は以上説明したように、被加熱物が収容される加熱庫と、加熱庫の周壁のいずれか一つに対応して配設され、被加熱物を高周波により加熱する高周波加熱手段と、加熱庫の高周波加熱手段が対応した周壁とは別の周壁のいずれか一つに対応して配設され、被加熱物を電磁誘導加熱する電磁誘導加熱手段とを備え、加熱庫の電磁誘導加熱手段に対応した周壁に、電磁誘導加熱手段からの磁束を透過し、かつ高周波加熱手段からの高周波を反射する層部材を設けたので、被加熱物のカス、蒸気、水分などが電磁誘導加熱手段側に侵入してしまうおそれがなくなり、電磁誘導加熱手段の錆や絶縁劣化の発生を防ぐことができるとともに、高周波による電磁誘導加熱手段への影響も防止することができ、簡単な構造で高周波加熱調理と電磁誘導加熱調理の両方を良好に行える複合型の加熱調理器をコストを抑えて得ることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態１の縦断面図である。
【図２】本発明の実施の形態２の縦断面図である。
【図３】本発明の実施の形態３の要部の縦断面図である。
【図４】本発明の実施の形態１の変形例を示す要部の縦断面図である。
【符号の説明】
２加熱庫、２ａ右側壁、２ｂ左側壁、２ｃ底壁、３ａ，３ｂ給電口、７載置板、８層部材、９マグネトロン、１１被加熱物、１６誘導加熱コイル、１７シールドケース、２２スターラー、Ｇ間隙。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heating cooker capable of cooking with high-frequency heating and electromagnetic induction heating.
[0002]
[Prior art]
The conventional high-frequency heating cooker with an electromagnetic induction heater has a heating chamber in which high-frequency dielectric heating is performed, the bottom surface of which is made of a non-magnetic material with a mesh of 10 to 25 and is fixed between two layers of insulating material. It is composed of a net, and an electromagnetic induction coil for electromagnetic induction heating is arranged below a metal net (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-4-65097 (page 2-3, FIG. 1)
[0004]
[Problems to be solved by the invention]
The above-mentioned conventional high-frequency heating cooker (heating cooker) with an electromagnetic induction heater is compatible with recent diversification of eating habits, and an electromagnetic induction coil for electromagnetic induction heating is used in a cooker capable of high-frequency induction heating. It is also possible to perform a baking function such as adding a grill to the object to be heated. However, a conventional high-frequency cooking device with an electromagnetic induction heater (heating cooking device) has a turntable for rotating a placed object to be heated in order to improve uneven heating. The hole through which the shaft of this turntable was to be passed had to be provided in the metal net secured between the two layers of insulating material, ie, approximately in the center of the bottom surface of the heating cabinet. Then, from the hole, scum, steam, moisture, and the like of the object to be heated may enter the electromagnetic induction coil provided below the metal mesh (the bottom surface of the heating chamber). However, there is a problem that rust and insulation deterioration occur. In addition, there is also a problem that a high frequency leaks from the hole provided in the metal net to the electromagnetic induction coil side and affects a sensor provided at a lower portion of the heating chamber, thereby causing a malfunction of the sensor. Was. Furthermore, since there is a possibility that the magnetic field lines of the electromagnetic induction coil that are not inside the heating chamber may not be sufficiently interrupted, there is a problem that the bottom plate of the heating cooker body and other components may generate heat. Further, since the metal net has a structure fixed between two layers of insulating materials, there is a problem that manufacturability, assemblability, yield, etc. are deteriorated, and cost is increased.
[0005]
The present invention has been made to solve the above-described problems, and has an object to provide a heating cooker that can perform both electromagnetic induction heating cooking and high-frequency heating cooking at a low cost. Things.
[0006]
[Means for Solving the Problems]
The heating cooker according to the present invention, a heating chamber in which the object to be heated is accommodated, and a high-frequency heating means disposed to correspond to any one of the peripheral walls of the heating chamber and heating the object to be heated with high frequency, An electromagnetic induction heating means arranged to correspond to any one of the peripheral walls different from the corresponding peripheral wall to which the high-frequency heating means of the heating chamber corresponds, and electromagnetically heating the object to be heated by electromagnetic induction heating; A layer member that transmits magnetic flux from the electromagnetic induction heating means and reflects high frequency from the high frequency heating means is provided on the peripheral wall corresponding to the means.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a longitudinal sectional view of Embodiment 1 of the present invention. In the drawing, a heating chamber 2 is formed in a substantially box-shaped main body 1 of a heating cooker having an opening on the front side, and high-frequency power supply ports 3a and 3b and an opening for temperature detection are formed on a right side wall 2a of the heating chamber 2. A hole 4 is provided, and an opening 5 for steam detection is provided on the left side wall 2b. An opening 6 is provided in the bottom wall 2c of the heating chamber 2 and is formed of a heat-resistant non-magnetic material made of a dielectric material such as ceramic which covers the opening 6 and constitutes the bottom wall 2c of the heating chamber 2. The mounting plate 7 is disposed inside the heating chamber 2, and between the mounting plate 7 and the bottom wall 2 c, a film containing a metal having a low conductive resistance, for example, a metal such as copper, aluminum, gold, and silver, or A thin plate-like layer member 8 is provided, and the layer member 8 is fixed to the upper surface of the bottom wall 2c with an adhesive such as a silicon adhesive. Note that the layer member 8 may be fixed to the lower surface side of the bottom wall 2c, or may be formed by vapor deposition, baking, mounting, or the like. A door (not shown) is provided on the front side of the main body 1 so as to be openable and closable by a hinge (not shown), and constitutes a front wall of the heating chamber 2 when closed. Close the opening.
[0008]
A magnetron 9 that oscillates high frequency is provided outside the right side wall 2a of the heating chamber 2, and the high frequency is guided to the power supply ports 3a and 3b through the waveguide 10, and the heating chamber 2 is supplied from the power supply ports 3a and 3b. The heating target 11 in the heating chamber 2 is heated by high frequency. Outside the upper wall 2d of the heating chamber 2, an upper heater 12 for heating the object to be heated 11 by radiant heat is provided. Above the upper heater 12, a heat insulating material 13 for insulating heat upward. Is provided, and a heat shield plate 14 is provided on the upper surface of the upper wall 2 d of the heating chamber 2 so as to surround a portion other than below the upper heater 12 and the heat insulating material 13. In the first embodiment, the upper heater 12 is of a flat type. However, any heater having another configuration such as a sheathed heater or a tubular heater may be used as long as leakage of high frequency during high frequency heating is taken into consideration. Good.
[0009]
An induction heating coil 16 held by a coil base 15 is provided outside the bottom wall 2 c of the heating chamber 2, and the bottom wall of the heating chamber 2 is held so as to surround the coil base 15 except for above the coil base 15 while holding the coil base 15. A shield case 17 is provided on the lower surface of 2c. The shield case 17 is made of a non-magnetic material having a low conductive resistance, such as aluminum or copper, for shielding the outer frame (for example, the side surface and the bottom surface) of the main body 1 so as not to be electromagnetically heated by the induction heating coil 16. The shield case 17 itself is not heated by electromagnetic induction. The object to be heated 11 is accommodated in a cooking dish 18 placed on the placing plate 7 and cooked. The cooking dish 18 is made of a magnetic material having a relatively high conductive resistance such as heat or stainless steel. Then, heat is generated by electromagnetic induction heating by the induction heating coil 16. The shape of the cooking dish 18 is not limited to a dish, and the shape is not limited as long as it generates heat by electromagnetic induction heating, such as a pot, a frying pan, and a kettle suitable for cooking. When cooking at high frequency, the object to be heated 11 may be directly mounted on the mounting plate 7 without the cooking plate 18.
[0010]
Outside the right side wall 2a of the heating chamber 2, a non-contact temperature sensor 19 for detecting the temperature of the object to be heated 11 corresponding to the opening 4 is provided, and outside the left side wall 2b of the heating chamber 2, A steam sensor 20 for detecting steam released from the object to be heated 11 is provided corresponding to the hole 5. In the main body 1, the driving of the magnetron 9, the upper heater 12, the induction heating coil 16, and the like is controlled based on the detection results of the non-contact temperature sensor 19 and the steam sensor 20, and various types of heating cooking of the cooking device are performed. A control device (not shown) for controlling the power supply is provided.
[0011]
In the first embodiment configured as described above, for example, when performing high-frequency heating cooking, first, the door is opened and the object to be heated 11 accommodated in the cooking dish 18 is placed on the placing plate 7 in the heating chamber 2. And close the door. Next, a range key for selecting a high-frequency heating function of an operation unit (not shown) provided on the front side of the main body 1 and a time key for inputting a cooking time are sequentially operated and set, and a start key is further operated. Then, the control device starts high-frequency heating cooking. Then, the control device drives the magnetron 9 to oscillate a high frequency, and irradiates the high frequency into the heating chamber 2 from the power supply ports 3a and 3b through the waveguide 10, thereby heating the object 11 to be heated. At this time, the high-frequency wave radiated in the direction of the mounting plate 7 is reflected by the layer member 8 disposed on the lower surface side of the mounting plate 7 and radiated into the heating chamber 2.
[0012]
The object to be heated 11 heated by the high frequency emits steam as the surface temperature increases, and the control device detects the temperature of the object to be heated 11 and the steam detection result detected by the non-contact temperature sensor 19 and the steam sensor 20. , The driving of the magnetron 9 is controlled, and when the object to be heated 11 is heated to a predetermined temperature, the driving of the magnetron 9 is stopped and the high-frequency cooking is terminated.
[0013]
Further, for example, when performing the electromagnetic induction heating cooking, similarly to the case of the high frequency heating cooking, the object to be heated 11 stored in the cooking dish 18 is placed on the placing plate 7 and the electromagnetic induction heating cooking of the operation unit is performed. When the electromagnetic induction heating key for selecting the function and the time key for inputting the cooking time are sequentially operated and set, and further the start key is operated, the control device starts the electromagnetic induction heating cooking. Then, the control device drives the induction heating coil 16 to generate an eddy current in the cooking dish 18 by the magnetic flux from the induction heating coil 16. Since the cooking dish 18 has a high conductive resistance, it generates Joule heat as eddy current loss and becomes energy for electromagnetic induction heating cooking. At this time, since the layer member 8 disposed on the lower surface side of the mounting plate 7 is made of a thin metal having a low conductive resistance, eddy current loss is low and Joule heat is hardly generated. Therefore, most of the magnetic flux passes through the layer member 8 and reaches the cooking dish 18 on the mounting plate 7. Further, since the induction heating coil 16 is surrounded by the shield case 17 together with the coil base 15, the magnetic field lines are prevented from reaching the outer frame side of the main body 1.
[0014]
The object to be heated 11 heated by the cooking dish 18 heated by Joule heat emits steam as the surface temperature increases, and the control device controls the object to be heated 11 detected by the non-contact temperature sensor 19 and the steam sensor 20. The heating of the induction heating coil 16 is controlled based on the detection result of the temperature and the steam, and when the object to be heated 11 is heated to a predetermined temperature, the driving of the induction heating coil 16 is stopped to perform the electromagnetic induction heating cooking. Terminate.
[0015]
As described above, the layer member 8 that reflects the high frequency and transmits the magnetic flux from the induction heating coil 16 is provided on the lower surface side of the mounting plate 7 that forms the bottom wall 2c of the heating chamber 2. It is not necessary to provide a hole through which the shaft of the turntable penetrates in the bottom wall 2c as in the prior art, and there is no possibility that scum, steam, moisture, and the like of the object to be heated 11 may enter the induction heating coil 16 side. Rust and insulation deterioration of the coil 16 can be prevented, and the effect of the high frequency on the induction heating coil 16 can be prevented, so that the life of the cooking device can be extended. Further, the lines of magnetic force of the induction heating coil 16 that are generated outside the inside of the heating chamber 2 can be sufficiently shut off, and heat generation of the bottom plate of the main body 1 and other components can be prevented. This makes it possible to obtain a composite heating cooker that can perform both high-frequency heating cooking and electromagnetic induction heating cooking with a simple structure at a reduced cost. In addition, alternate heating in which high-frequency heating and induction induction heating are instantaneously switched, or two heating methods (high-frequency heating and electromagnetic induction heating) of internal heating of the object to be heated 11 and grilling from the surface are simultaneously performed. An easy-to-use heating cooker that can perform cooking in a short time with high efficiency and high heat can be obtained.
[0016]
Embodiment 2 FIG.
FIG. 2 is a longitudinal sectional view of a second embodiment of the present invention. In the second embodiment, a concave portion provided in a left side wall 2b of a heating chamber 2 in a main body 1 in the heating cooker according to the first embodiment. 21 is provided with a stirrer 22 which is a stirring means which is rotated by a motor 23 to stir the high frequency in the heating chamber 2. The opening side of the recess 21 and the left side wall 2 b are substantially coplanar in the recess 21. A protection plate 24 is provided so as to cover the stirrer 22. The protection plate 24 is made of a dielectric material such as a mica plate, and protects the stirrer 22 from dirt and the like in the heating chamber 2. Note that, instead of the stirrer 22, another device for changing the electric field may be provided. Further, the stirrer 22 is provided on the left side wall 2b facing the right side wall 2a of the heating chamber 2 provided with the power supply ports 3a and 3b, but is provided near the power supply ports 3a and 3b of the right side wall 2a or the right side wall 2a. Is also good. In these cases, the high frequency in the heating chamber 2 and the high frequency supplied from the power supply ports 3a and 3b are stirred.
[0017]
In the second embodiment configured as described above, for example, when high-frequency heating cooking is performed, the object to be heated 11 placed on the cooking dish 18 is stored in the heating chamber 2 as in the case described in the first embodiment. When the high frequency heating cooking is started by operating the operation unit, the control device drives the magnetron 9 to oscillate the high frequency and irradiates the inside of the heating chamber 2 to heat the object 11 to be heated. At the same time, the motor 23 is driven to rotate the stirrer 22 to agitate the high frequency in the heating chamber 2, thereby causing irregular reflection in the heating chamber 2. The high-frequency wave radiated in the direction of the mounting plate 7 is reflected by the layer member 8 disposed on the lower surface side of the mounting plate 7 and radiated into the heating chamber 2. The high frequency irregularly reflected in the heating chamber 2 hits the object to be heated 11 without unevenness.
[0018]
The object to be heated 11 heated by the high frequency emits steam as the surface temperature increases, and the control device detects the temperature of the object to be heated 11 and the steam detection result detected by the non-contact temperature sensor 19 and the steam sensor 20. , The driving of the magnetron 9 is controlled, and when the object to be heated 11 is heated to a predetermined temperature, the driving of the magnetron 9 is stopped and the high-frequency cooking is terminated.
When performing the electromagnetic induction heating cooking, the induction heating coil 16 is driven and the object to be heated 1 is electromagnetically heated without rotating the stirrer 22 as in the first embodiment.
[0019]
As described above, since the stirrer 22 for stirring the high frequency is provided in the heating chamber 2, the high frequency can be applied to the object to be heated 11 without unevenness, and high-frequency heating and cooking without uneven heating can be performed without using a turntable. it can. In addition, since the turntable is not used, even when the object to be heated 11 is not placed at the center of the bottom wall 2c (the placing plate 7) of the heating chamber 2, the cooking can be performed without unevenness due to the irregularly reflected high frequency. Failures such as damage to the shaft of the turntable or rotation of the turntable due to tilting can be prevented, and a highly reliable heating cooker can be obtained.
[0020]
Embodiment 3 FIG.
FIG. 3 is a longitudinal sectional view of a main part of a third embodiment of the present invention. The third embodiment is directed to a heating cooker according to the first embodiment. The gap G up to 17a is configured to be maintained at a predetermined interval (here, 20 mm) or more. The gap from the lower part of the induction heating coil 16 to the inner bottom surface 17a of the shield case 17 may be maintained at a predetermined distance or more.
[0021]
With this configuration, substantially the same operation and effect as those of the first embodiment can be obtained, and the gap G is maintained at a predetermined interval (20 mm) or more, depending on the output of the induction heating coil 16, The influence of the lines of magnetic force on the outer frame and the like of the main body 1 can be reduced, and the heating of the cooking dish 18 other than the cooking dish 18 in the heating chamber 2 can be prevented. Thus, a heating cooker that can prevent a decrease in heating efficiency in electromagnetic induction heating cooking is obtained.
[0022]
In the above-described first to third embodiments, the case where the object to be heated 11 is accommodated in the cooking dish 18 made of a magnetic material has been described. However, as shown in FIG. 4, the cooking dish 18A is made of a non-magnetic material. Alternatively, a thin plate member 25 made of a magnetic material may be placed or joined to the inner bottom surface of the cooking dish 18A, and the object to be heated 11 may be placed on the plate member 25. In this case, the same effect can be obtained.
Although the case where the invention according to the third embodiment is implemented in the first embodiment has been described, the invention according to the third embodiment may be implemented in the second embodiment. In this case, the same effect can be obtained.
[0023]
【The invention's effect】
The present invention, as described above, a heating chamber in which an object to be heated is housed, and a high-frequency heating unit arranged corresponding to any one of the peripheral walls of the heating chamber and heating the object to be heated with high frequency, An electromagnetic induction heating means arranged to correspond to any one of the peripheral walls different from the corresponding peripheral wall to which the high-frequency heating means of the heating chamber corresponds, and electromagnetically heating the object to be heated by electromagnetic induction heating; On the peripheral wall corresponding to the means, a layer member that transmits magnetic flux from the electromagnetic induction heating means and reflects high frequency from the high frequency heating means is provided, so that refuse, steam, moisture, etc. of the object to be heated can be removed by the electromagnetic induction heating means. It is possible to prevent rust and insulation deterioration of the electromagnetic induction heating means and prevent the electromagnetic induction heating means from being affected by high frequency. Cooking and electromagnetic induction The composite cooking device capable of performing satisfactorily both heat cooking can be obtained with reduced costs.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of Embodiment 1 of the present invention.
FIG. 2 is a longitudinal sectional view of a second embodiment of the present invention.
FIG. 3 is a longitudinal sectional view of a main part according to a third embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of a main part showing a modification of the first embodiment of the present invention.
[Explanation of symbols]
2 heating chamber, 2a right side wall, 2b left side wall, 2c bottom wall, 3a, 3b power supply port, 7 mounting plate, 8 layer member, 9 magnetron, 11 object to be heated, 16 induction heating coil, 17 shield case, 22 stirrer , G gap.

Claims

被加熱物が収容される加熱庫と、
該加熱庫の周壁のいずれか一つに対応して配設され、前記被加熱物を高周波により加熱する高周波加熱手段と、
前記加熱庫の高周波加熱手段が対応した周壁とは別の周壁のいずれか一つに対応して配設され、前記被加熱物を電磁誘導加熱する電磁誘導加熱手段と
を備え、
前記加熱庫の電磁誘導加熱手段に対応した周壁に、前記電磁誘導加熱手段からの磁束を透過し、かつ前記高周波加熱手段からの高周波を反射する層部材を設けたことを特徴とする加熱調理器。A heating chamber in which an object to be heated is stored;
High-frequency heating means disposed to correspond to any one of the peripheral walls of the heating chamber and heating the object to be heated by high frequency;
The high-frequency heating means of the heating chamber is provided corresponding to any one of the peripheral walls different from the corresponding peripheral wall, and comprises electromagnetic induction heating means for electromagnetically heating the object to be heated,
A heating cooker, wherein a layer member that transmits magnetic flux from the electromagnetic induction heating means and reflects high frequency from the high frequency heating means is provided on a peripheral wall corresponding to the electromagnetic induction heating means of the heating chamber. .

前記層部材を、導電抵抗の低い金属材料によって構成したことを特徴とする請求項１記載の加熱調理器。2. The cooking device according to claim 1, wherein the layer member is made of a metal material having a low conductive resistance.

前記層部材により、前記加熱庫の電磁誘導加熱手段に対応した周壁を構成したことを特徴とする請求項１または２記載の加熱調理器。The heating cooker according to claim 1 or 2, wherein the layer member forms a peripheral wall corresponding to the electromagnetic induction heating means of the heating chamber.

前記層部材を、耐熱性の非磁性体からなる載置板に含むように形成し、該載置板により前記加熱庫の電磁誘導加熱手段に対応した周壁を構成したことを特徴とする請求項１または２記載の加熱調理器。The layer member is formed so as to be included in a mounting plate made of a heat-resistant nonmagnetic material, and the mounting plate forms a peripheral wall corresponding to the electromagnetic induction heating means of the heating chamber. 3. The heating cooker according to 1 or 2.

前記加熱庫の電磁誘導加熱手段に対応した周壁とは別の周壁のいずれか１つ、または、前記加熱庫の高周波加熱手段が対応した周壁の高周波を加熱庫内に供給するための給電口の近傍に、前記加熱庫内の高周波または加熱庫に供給される高周波を撹拌する撹拌手段を設けたことを特徴とする請求項１乃至４のいずれかに記載の加熱調理器。A power supply port for supplying high frequency of the peripheral wall corresponding to one of the peripheral walls corresponding to the electromagnetic induction heating means of the heating chamber and another high frequency heating means of the heating chamber to the inside of the heating chamber. The heating cooker according to any one of claims 1 to 4, wherein a stirrer for stirring high frequency in the heating chamber or high frequency supplied to the heating chamber is provided in the vicinity.

前記加熱庫の電磁誘導加熱手段に対応した周壁に、該周壁側を開放して前記電磁誘導加熱手段を覆うシールドケースを設け、該シールドケースと前記電磁誘導加熱手段との間隙を、所定の間隔以上保持するように構成したことを特徴とする請求項１乃至５のいずれかに記載の加熱調理器。On the peripheral wall corresponding to the electromagnetic induction heating means of the heating chamber, a shield case is provided which opens the peripheral wall side and covers the electromagnetic induction heating means, and a gap between the shield case and the electromagnetic induction heating means is provided at a predetermined interval. The cooking device according to any one of claims 1 to 5, wherein the cooking device is configured to hold the cooking device.

前記シールドケースを、非磁性体で導電抵抗の低い金属材料によって構成したことを特徴とする請求項６記載の加熱調理器。7. The cooking device according to claim 6, wherein the shield case is made of a non-magnetic metal material having a low conductive resistance.

前記加熱庫の電磁誘導加熱手段に対応した周壁を、前記加熱庫の底壁としたことを特徴とする請求項１乃至７のいずれかに記載の加熱調理器。The cooking device according to any one of claims 1 to 7, wherein a peripheral wall corresponding to the electromagnetic induction heating means of the heating chamber is a bottom wall of the heating chamber.