JP3171133B2 - Electromagnetic induction cooker - Google Patents
Electromagnetic induction cookerInfo
- Publication number
- JP3171133B2 JP3171133B2 JP6264897A JP6264897A JP3171133B2 JP 3171133 B2 JP3171133 B2 JP 3171133B2 JP 6264897 A JP6264897 A JP 6264897A JP 6264897 A JP6264897 A JP 6264897A JP 3171133 B2 JP3171133 B2 JP 3171133B2
- Authority
- JP
- Japan
- Prior art keywords
- inner pot
- heat
- conductive layer
- heat conductive
- electromagnetic induction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電磁誘導作用によ
り内鍋を発熱させる電磁誘導炊飯器に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction rice cooker that generates heat in an inner pot by electromagnetic induction.
【０００２】[0002]
【従来の技術】近年、電磁誘導加熱を利用した電磁誘導
炊飯器が提案されている。図８において、１は上面が開
口する円筒上の本体で、この本体１内部には断熱材２を
介して内鍋収納部である保護枠３が配設され、かつこの
保護枠３は非金属材料により有底円筒状に成形され、保
護枠３の上端部は前記本体１の上端部内周囲に嵌着され
ている。2. Description of the Related Art In recent years, an electromagnetic induction rice cooker utilizing electromagnetic induction heating has been proposed. In FIG. 8, reference numeral 1 denotes a cylindrical main body having an open upper surface. Inside the main body 1, a protective frame 3 serving as an inner pot storage portion is provided via a heat insulating material 2, and the protective frame 3 is made of non-metallic material. The protective frame 3 is formed into a cylindrical shape with a bottom, and the upper end of the protective frame 3 is fitted around the upper end of the main body 1.
【０００３】４は上端開口部に外方に突出するフランジ
５を形成した内鍋で、この内鍋は高熱伝導率を有するア
ルミニウムで構成された熱伝導層４Ａと、この熱伝導層
４Ａの外面に位置する磁性金属材料であるフェライト系
ステンレスよりなる発熱層４Ｂをクラッドしたものを使
用し、さらに熱伝導層４Ａの内面にはフッ素コーティン
グ４Ｃを施している。[0003] Reference numeral 4 denotes an inner pot having an outwardly protruding flange 5 formed at the upper end opening. The inner pot has a heat conductive layer 4A made of aluminum having a high thermal conductivity, and an outer surface of the heat conductive layer 4A. A heat-generating layer 4B made of a ferritic stainless steel, which is a magnetic metal material, is clad, and a fluorine coating 4C is applied to the inner surface of the heat conductive layer 4A.
【０００４】また、内鍋４はフランジ５を保護枠３の上
面に懸架状態に載置することにより、保護枠３内に着脱
自在に配設されている。保護枠３の外側には誘導コイル
６が配設され、この誘導コイル６は最内周および最外周
の巻きを密にしている。The inner pan 4 is detachably disposed in the protective frame 3 by mounting the flange 5 on the upper surface of the protective frame 3 in a suspended state. An induction coil 6 is provided outside the protection frame 3, and the induction coil 6 has a close innermost and outermost winding.
【０００５】さらに、誘導コイル６は、内鍋４の外周面
までの距離が一定となるように、前記保護枠３の外周下
部に耐熱性樹脂材料で成形されたコイルカバー７により
支持されている。誘導コイル６の下方には、酸化鉄を主
原料としかつ高透磁率の材料を焼結させたフェライト棒
８が位置し、このフェライト棒８は前記コイルカバー７
の下面に接着されており、誘導コイル６より発生する磁
束が下方に漏れるのを防止している。[0005] Further, the induction coil 6 is supported by a coil cover 7 formed of a heat-resistant resin material on the lower part of the outer periphery of the protective frame 3 so that the distance to the outer peripheral surface of the inner pot 4 is constant. . Below the induction coil 6, a ferrite rod 8 made of iron oxide as a main raw material and sintered with a material having a high magnetic permeability is located.
To prevent the magnetic flux generated from the induction coil 6 from leaking downward.
【０００６】９は耐熱樹脂により成形されたサーモケー
スで、このサーモケース９は保護枠３の外底部に一体成
形された案内筒１０に上下動可能に支持され、かつ案内
筒とサーモケース９の間に配設された圧縮コイルバネ１
１により常に上方に付勢されている。１２はアルミニウ
ムで構成されたコンタクトで、このコンタクト１２は負
特性サーミスタよりなる温度検知素子１３及び感熱ケー
ス１４を介してサーモケース９の上部に嵌着し、コンタ
クト１２の上面が内鍋４の外底面に圧着するようにして
いる。Reference numeral 9 denotes a thermo case formed of a heat-resistant resin. The thermo case 9 is supported by a guide tube 10 integrally formed on the outer bottom of the protective frame 3 so as to be able to move up and down. Compression coil spring 1 disposed between
1 is always biased upward. Reference numeral 12 denotes a contact made of aluminum. The contact 12 is fitted on the upper portion of the thermo case 9 via a temperature detecting element 13 composed of a negative temperature coefficient thermistor and a heat sensitive case 14. Crimping on the bottom.
【０００７】１５は誘導コイル６に交番磁界を発生させ
るための電流を流す回路基板で、この回路基板１５は保
護枠３より下方の空間に装着されている。１６は合成樹
脂製の外蓋で、この外蓋１６は保護枠３の上部に一体成
形されたヒンジ部材１７にピン１８を介して回動自在に
支持され、かつ上面に持ち運び用の把手部１９がネジ止
めされている。２０は内カバーで、この内カバー２０は
断熱材２１を介して外蓋１６の内面に固着されている。
２２はヒンジ部材１８と反対側に位置して保護枠３の上
端部に一体成形された係合部材で、この係合部材２２と
対向するように外蓋１６に係合レバー２３がピン２４を
介して回動可能に支持されている。Reference numeral 15 denotes a circuit board through which a current for generating an alternating magnetic field in the induction coil 6 flows. The circuit board 15 is mounted in a space below the protection frame 3. Reference numeral 16 denotes an outer cover made of a synthetic resin. The outer cover 16 is rotatably supported via a pin 18 on a hinge member 17 integrally formed on the upper portion of the protective frame 3 and has a handle portion 19 for carrying on the upper surface. Is screwed. Reference numeral 20 denotes an inner cover, and the inner cover 20 is fixed to the inner surface of the outer lid 16 via a heat insulating material 21.
Reference numeral 22 denotes an engagement member which is located on the opposite side of the hinge member 18 and is integrally formed on the upper end of the protection frame 3. The engagement lever 23 connects the pin 24 to the outer lid 16 so as to face the engagement member 22. It is supported rotatably through the.
【０００８】そして、係合部材２２の先端部に設けられ
た係合部２２Ａは、外蓋１６を閉じたときに係合レバー
２３の係合部２３Ａに係合するようになっている。ま
た、係合レバー２３はばね２５によって係合部２３Ａが
係合部材２２、係合部２２Ａと常時係合する方向に回動
付勢されている。２６は内蓋で、この内蓋２６は内カバ
ー２０の下面下方に突出して設けた支持ピン２８に上下
動可能に支持され、かつパッキン２９により常に下方に
付勢されているもので、前記外蓋を閉じたときに内鍋４
のフランジ５に圧接してその内鍋４を密閉するようにな
っている。The engaging portion 22A provided at the distal end of the engaging member 22 is adapted to engage with the engaging portion 23A of the engaging lever 23 when the outer lid 16 is closed. Further, the engagement lever 23 is urged by a spring 25 in a direction in which the engagement portion 23A is always engaged with the engagement member 22 and the engagement portion 22A. Reference numeral 26 denotes an inner cover. The inner cover 26 is vertically movably supported by a support pin 28 projecting below the lower surface of the inner cover 20, and is constantly urged downward by a packing 29. Inner pan 4 when lid is closed
And presses against the flange 5 to hermetically seal the inner pan 4.
【０００９】[0009]
【発明が解決しようとする課題】ところが、上記内鍋４
に使用しているクラッド材を生産するにあたっては大規
模な設備投資が必要で設備投資額が高いため、クラッド
材の値段が高いものであった。また、クラッド材を内鍋
４に成形する過程で、熱伝導層と発熱層との剥離やしわ
が発生し易く歩留まりが悪くなるものであった。However, the inner pan 4
In order to produce the clad material used in the above, large-scale capital investment is required and the capital investment amount is high, so that the price of the clad material is high. Further, in the process of forming the clad material into the inner pot 4, peeling and wrinkling between the heat conductive layer and the heat generating layer were apt to occur, and the yield was deteriorated.
【００１０】さらに、フェライト系ステンレスを深絞り
するとステンレス表面が鮫肌状に荒れるため、大規模な
磨き行程が必要であった。Further, when the ferritic stainless steel is deeply drawn, the surface of the stainless steel becomes rough like a shark skin, so that a large-scale polishing process is required.
【００１１】以上のように２層鍋の製造コストは非常に
高いものであった。さらに、誘導コイル６近傍の熱伝導
層を厚くすることにより、熱の拡散が均一になり炊きむ
らの少ないおいしいご飯が炊けることは一般的に知られ
ているが、クラッド板を用いたときには内鍋４の熱伝導
層は一定であり、コイル近傍の肉厚を厚くすることは内
鍋４全体の肉厚を厚くすることになり、コストや内鍋重
量の関係上コイル近傍の肉厚を十分厚くすることができ
なかった。As described above, the production cost of the two-layer pot was very high. Further, it is generally known that by making the heat conductive layer in the vicinity of the induction coil 6 thicker, the diffusion of heat is uniform, and delicious rice with less cooking unevenness can be cooked. The thickness of the heat conductive layer 4 is constant, and increasing the thickness in the vicinity of the coil increases the thickness of the entire inner pan 4, and the thickness in the vicinity of the coil is sufficiently increased due to cost and weight of the inner pan. I couldn't.
【００１２】また従来の２層の内鍋４は、誘導コイル６
から離れ発熱しない部分にも発熱層が存在するため内鍋
自体が必要以上に重くなり取扱いが不便であった。A conventional two-layer inner pot 4 is provided with an induction coil 6.
Since the heat generating layer also exists in a part that is separated from the heat source and does not generate heat, the inner pot itself becomes unnecessarily heavy and handling is inconvenient.
【００１３】さらに２層の内鍋４を成形中、鍋底に剥離
が生じた時、発熱層で発熱した熱が熱伝導層に十分伝達
せず、その結果、発熱層のみ過昇し、その温度を温度検
知装置が誤検知し早切れを起こし炊飯できなくなる問題
があった。Further, when the inner bottom 4 of the two layers is formed, when the bottom of the pan is peeled off, the heat generated in the heat generating layer does not sufficiently transfer to the heat conductive layer. As a result, only the heat generating layer excessively rises and its temperature rises. Temperature detection device erroneously detects that the rice is cut off quickly and cannot cook rice.
【００１４】本発明は上記問題に鑑み、加工性に優れ製
造コストが安く、且つ炊飯性能を向上させた電磁誘導加
熱及び調理の可能な内鍋を備えた炊飯器を提供すること
を目的とする。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a rice cooker provided with an electromagnetic induction heating and cooking inner pan which is excellent in processability, inexpensive in production cost and improved in rice cooking performance. .
【００１５】また、他の目的として、加工性に優れると
ともに磨き行程を無くすまたは大幅に簡略化して製造コ
ストが安く、且つ電磁誘導加熱及び調理の可能な内鍋を
備えた炊飯器を提供するものである。Another object of the present invention is to provide a rice cooker having an inner pot which is excellent in workability, eliminates or greatly simplifies the polishing process, is low in production cost, and is capable of electromagnetic induction heating and cooking. It is.
【００１６】[0016]
【課題を解決するための手段】上記課題を解決するため
に、本発明の電磁誘導炊飯器は、アルミニウムよりなる
熱伝導層の外側に磁性材料よりなる発熱層を厚膜メッキ
し、あるいは、磁性材料よりなる発熱層の内側にアルミ
ニウムよりなる熱伝導層を厚膜メッキ等してなる内鍋を
備えたものである。In order to solve the above-mentioned problems, an electromagnetic induction rice cooker according to the present invention is characterized in that a heat-generating layer made of a magnetic material is thick-plated on the outside of a heat-conductive layer made of aluminum, A heat conduction layer made of aluminum is provided with an inner pot formed by thick film plating or the like inside a heat generation layer made of a material.
【００１７】[0017]
【発明の実施の形態】請求項１記載の発明は、内鍋をア
ルミニウムよりなる熱伝導層の外側に、磁性材料よりな
る発熱層を厚膜メッキにて構成することにより、内鍋の
材料にクラッド材を使う必要がなくなり、従ってクラッ
ド材を生産する大規模な設備が不要となるとともに加工
性に優れ製造コストが安くなり、熱伝導層と発熱層との
剥離やしわが発生がなく歩留まりが向上する。さらに、
フェライト系ステンレスを深絞りする工程がないため、
鍋外面にも鮫肌状に荒れることがなく、従って大規模な
磨き行程を廃止でき製造コストが削減できる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that the inner pot is formed on the outside of a heat conductive layer made of aluminum, and the heat generating layer made of a magnetic material is formed by thick film plating, so that the inner pot is made of a material. There is no need to use clad material, so large-scale equipment for producing clad material is not required, workability is excellent, manufacturing costs are reduced, and there is no peeling or wrinkling between the heat conductive layer and the heat generating layer, and the yield is low. improves. further,
Since there is no deep drawing process for ferritic stainless steel,
The outer surface of the pot is not roughened like a shark, so that a large-scale polishing process can be eliminated and the production cost can be reduced.
【００１８】請求項２記載の発明は、内鍋をフェライト
系ステンレス鋼板等の薄板よりなる発熱層の内側に、ア
ルミニウムよりなる熱伝導層を厚膜メッキにて構成する
ことにより、熱伝導層を最小に抑えることができ、丈夫
で軽く且つ電磁誘導加熱及び調理の可能な内鍋を実現で
きる。According to a second aspect of the present invention, the heat conductive layer is formed by forming the inner pot inside a heat generating layer made of a thin plate such as a ferritic stainless steel plate and a heat conductive layer made of aluminum by thick film plating. An inner pot that can be minimized, is durable, light, and capable of electromagnetic induction heating and cooking can be realized.
【００１９】請求項３記載の発明は、誘導コイルに対向
する近傍部の熱伝導層の厚みを他の部分より厚くしたこ
とにより、調理物がより均一に加熱され調理性能が向上
する。According to the third aspect of the present invention, the thickness of the heat conductive layer in the vicinity of the induction coil is made larger than that of the other portions, so that the food is more uniformly heated and the cooking performance is improved.
【００２０】請求項４記載の発明は、少なくとも発熱部
材部分にニッケルまたはクロム等の防腐メッキを施すこ
とにより信頼性の向上がはかれ、さらに製造コストが安
く且つ軽く扱いやすく信頼性の高い電磁誘導加熱及び調
理の可能な内鍋を実現できるものである。According to a fourth aspect of the present invention, at least the heat-generating member is provided with antiseptic plating such as nickel or chromium to improve reliability, and furthermore, the manufacturing cost is low, the handling is light, and the electromagnetic induction is highly reliable. An inner pot that can be heated and cooked can be realized.
【００２１】請求項５記載の発明は、内鍋の誘導コイル
と内鍋の対向する近傍部のみに発熱層を設けることによ
り、誘導コイルから離れ発熱しない発熱層を無くし、発
熱層の重量を削減することができる。従って、軽量で扱
いやすく且つ電磁誘導加熱及び調理の可能な内鍋を実現
できる。According to the fifth aspect of the present invention, the heat generating layer is provided only in the vicinity of the induction coil of the inner pot and the opposing side of the inner pot, so that the heat generating layer which is separated from the induction coil and does not generate heat is eliminated, and the weight of the heat generating layer is reduced. can do. Therefore, an inner pot that is lightweight, easy to handle, and capable of electromagnetic induction heating and cooking can be realized.
【００２２】請求項６記載の発明は、内鍋と温度検知装
置の当接面は熱伝導層を露出することにより、鍋底に剥
離が生じて、発熱層が過昇してもその温度を熱伝導層の
温度を温度検知装置が検知し早切れを防止するため常に
安定した炊飯ができる。According to a sixth aspect of the present invention, the contact surface between the inner pot and the temperature detecting device exposes the heat conductive layer, so that the bottom of the pot is peeled off and the temperature is increased even if the heating layer rises excessively. The temperature of the conductive layer is detected by the temperature detecting device to prevent premature disconnection, thereby enabling stable rice cooking at all times.
【００２３】[0023]
（実施例１）以下、本発明の第１の実施例を図１〜図２
により説明する。図において、３０は上面が開口する略
円筒状の本体で、この本体３０の開口部には上枠３１が
嵌着している。前記本体３０内部には金属製材料よりな
る保護枠胴３２とコイルベース３３を配設して鍋収納部
を形成している。コイルベース３３は非金属材料により
有底円筒状に成形され、コイルベース３３の上端部は前
記保護枠胴３２を介して上枠３１に固定されている。上
枠３１から断熱壁３１Ａが形成されて、保護枠胴３２と
の間に断熱空間３４が形成されている。３５は、保温ヒ
ーターで保護枠胴３２にアルミテープにより固定されて
いる。Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
This will be described below. In the figure, reference numeral 30 denotes a substantially cylindrical main body having an open upper surface, and an upper frame 31 is fitted into an opening of the main body 30. Inside the main body 30, a protective frame body 32 made of a metal material and a coil base 33 are arranged to form a pot storage portion. The coil base 33 is formed in a cylindrical shape with a bottom from a non-metallic material, and the upper end of the coil base 33 is fixed to the upper frame 31 via the protective frame body 32. A heat insulating wall 31 </ b> A is formed from the upper frame 31, and a heat insulating space 34 is formed between the upper frame 31 and the protective frame body 32. Reference numeral 35 denotes a heat retaining heater which is fixed to the protective frame body 32 with aluminum tape.
【００２４】３６は上端開口部に外方に突出するフラン
ジ３７を形成した内鍋で、この鍋は図２に示すように、
側壁をｔ１．５〜ｔ２、底面を側壁の１．２倍〜１．５
倍の肉厚としたアルミダイカストで熱伝導層３６Ａを形
成するとともに、この熱伝導層３６Ａの外面に磁性金属
材料であるフェライト系ステンレス鋼板よりなる発熱層
３６Ｂを同時にアウトサートしたものを使用し、さらに
熱伝導層３６Ａの内面にはフッ素コーティング３６Ｃを
施している。従って内鍋の材料にクラッド材を使う必要
がなくなり、クラッド材を生産する大規模な設備が不要
となるとともに加工性に優れ製造コストが削減できる。Reference numeral 36 denotes an inner pot in which a flange 37 projecting outward is formed at the upper end opening. As shown in FIG.
The side wall is t1.5 to t2, and the bottom is 1.2 to 1.5 times the side wall.
A heat conductive layer 36A is formed by aluminum die casting having twice the thickness, and a heat generating layer 36B made of a ferritic stainless steel plate, which is a magnetic metal material, is simultaneously inserted on the outer surface of the heat conductive layer 36A. Further, a fluorine coating 36C is applied to the inner surface of the heat conductive layer 36A. Therefore, it is not necessary to use a clad material as the material of the inner pot, so that a large-scale facility for producing the clad material is not required and the workability is excellent and the production cost can be reduced.
【００２５】また、内鍋３６はフランジ３７を上枠３１
の上面に耐熱性樹脂で構成された上枠キャップ３１Ａを
介して懸架状態に載置することにより、着脱自在に配設
されている。コイルベース３３の外側には誘導コイル３
８が配設され、この誘導コイル３８は最内周および最外
周の巻きを密にしている。さらに、誘導コイル３８は、
内鍋３６の外周面までの距離が一定となるように、前記
コイルベース３３の外周下部に耐熱性樹脂材料で成形さ
れたコイルカバー３９により支持されている。誘導コイ
ル３８の下方には、酸化鉄を主原料としかつ高透磁率の
材料を焼結させたフェライト棒４０が位置し、このフェ
ライト棒４０は前記コイルカバー３９の下面に接着され
ており、誘導コイル３８より発生する磁束が下方に漏れ
るのを防止している。In addition, the inner pot 36 has the flange 37 attached to the upper frame 31.
Is mounted in a suspended state via an upper frame cap 31A made of a heat-resistant resin, thereby being removably disposed. The induction coil 3 is provided outside the coil base 33.
8, the induction coil 38 has a close innermost and outermost winding. Further, the induction coil 38
The coil base 33 is supported by a coil cover 39 formed of a heat-resistant resin material on the lower part of the outer periphery of the coil base 33 so that the distance to the outer peripheral surface of the inner pot 36 is constant. Below the induction coil 38, a ferrite rod 40 made of iron oxide as a main raw material and sintered with a material having a high magnetic permeability is located. The ferrite rod 40 is adhered to the lower surface of the coil cover 39, The magnetic flux generated from the coil 38 is prevented from leaking downward.
【００２６】４１は温度検知装置で以下に示す構造とな
っている。４１Ａは耐熱樹脂により成形されたサーモケ
ースで、このサーモケース４１Ａはコイルベース３３の
外底部に一体成形された案内筒４２内にセンサー台４３
により上下動可能に支持され、かつセンサー台４３とサ
ーモケース４１Ａの間に配設された圧縮コイルバネ４４
により常に上方に付勢されている。４５はアルミニウム
で構成されたコンタクトで、このコンタクト４５は負特
性サーミスタよりなる温度検知素子４６及び感熱ケース
４７を介してサーモケース４１Ａの上部に嵌着し、コン
タクト４５の上面が内鍋３６の外底面に圧着するように
している。Reference numeral 41 denotes a temperature detecting device having the following structure. 41A is a thermo case formed of a heat-resistant resin. The thermo case 41A is provided with a sensor base 43 in a guide cylinder 42 integrally formed on the outer bottom of the coil base 33.
And a compression coil spring 44 disposed between the sensor base 43 and the thermo case 41A.
Is always biased upward. Reference numeral 45 denotes a contact made of aluminum. The contact 45 is fitted on the upper part of the thermo case 41A via a temperature detecting element 46 composed of a negative temperature coefficient thermistor and a heat sensitive case 47. Crimping on the bottom.
【００２７】４８は誘導コイル３８に交番磁界を発生さ
せるための電流を流す回路基板、４９は基板ベースで本
体３０と上枠３１に嵌着して前記回路基板４８ならびに
操作基板５０を固定している。５１は合成樹脂製の外蓋
で、この外蓋５１は上枠３１の後部に一体成形されたヒ
ンジ部材５２にピン５３を介して回動自在に支持され、
蓋バネ５４に付勢されている。５５は内蓋カバーで、こ
の内蓋カバー５５は外蓋５１の内面に固着されている。
５７はヒンジ部材５２と反対側に位置して上枠３１の前
方部に回動可能に設けられた係合レバーで、レバーバネ
５８により付勢されている。５９は前記内蓋カバー５５
に一体成形された係合部材で、この係合部材５９と係合
レバー５７が対向している。Reference numeral 48 denotes a circuit board through which a current for generating an alternating magnetic field is generated in the induction coil 38. Reference numeral 49 denotes a board base which is fitted to the main body 30 and the upper frame 31 to fix the circuit board 48 and the operation board 50. I have. Reference numeral 51 denotes an outer cover made of a synthetic resin. The outer cover 51 is rotatably supported via a pin 53 on a hinge member 52 integrally formed on a rear portion of the upper frame 31,
It is urged by the lid spring 54. Reference numeral 55 denotes an inner lid cover, and the inner lid cover 55 is fixed to the inner surface of the outer lid 51.
An engagement lever 57 is provided on the opposite side of the hinge member 52 and rotatably provided at a front portion of the upper frame 31, and is urged by a lever spring 58. 59 is the inner lid cover 55
The engaging member 59 and the engaging lever 57 are opposed to each other.
【００２８】そして、係合部材５９の先端部に設けられ
た係合部５９Ａは、外蓋５１を閉じたときに係合レバー
５７の係合部５７Ａに係合するようになっている。ま
た、係合レバー５７を押すと蓋バネ５４より外蓋５１が
自動的に開く。また、パッキン６０が常に下方に付勢さ
れており、前記外蓋を閉じたときに内鍋３６のフランジ
３７に圧接してその内鍋３６を密閉するようになってい
る。The engaging portion 59A provided at the distal end of the engaging member 59 is adapted to engage with the engaging portion 57A of the engaging lever 57 when the outer lid 51 is closed. When the engaging lever 57 is pressed, the outer lid 51 is automatically opened by the lid spring 54. Further, the packing 60 is always urged downward, so that when the outer lid is closed, the inner pot 36 is sealed by pressing against the flange 37 of the inner pot 36.
【００２９】このように構成した本実施例の動作を説明
する。内鍋３６内に被調理物を収納し、上枠３１の上面
に懸架状態に載置する。そして、外蓋５１を閉じた後、
操作基板５０により動作を開始させる。この動作を開始
することにより、回路基板４８が動作し誘導コイル３８
に交番磁界を発生させるための電流を流す。誘導コイル
３８に交番磁界が発生し、これにより内鍋３６の発熱層
３６Ｂに渦電流が流れ、この渦電流によるジュール熱
で、内鍋３６が誘導加熱されて、熱伝導層３６Ａを介し
て被調理物が加熱調理される。この時誘導コイル３８近
傍の熱伝導層３６Ａを厚くすることにより、調理物がよ
り均一に加熱され調理性能が向上する。この場合温度検
知素子４６の温度より操作基板５０内の電力制御回路
（図示せず）にあらかじめ入力されている調理パターン
により調理を行う。The operation of the embodiment constructed as described above will be described. The object to be cooked is stored in the inner pot 36 and placed on the upper surface of the upper frame 31 in a suspended state. Then, after closing the outer lid 51,
The operation is started by the operation board 50. By starting this operation, the circuit board 48 operates and the induction coil 38
A current for generating an alternating magnetic field. An alternating magnetic field is generated in the induction coil 38, whereby an eddy current flows through the heat generating layer 36B of the inner pot 36, and the inner pot 36 is induction-heated by Joule heat due to the eddy current, and is covered via the heat conductive layer 36A. The food is cooked. At this time, by increasing the thickness of the heat conductive layer 36A near the induction coil 38, the food is more uniformly heated and the cooking performance is improved. In this case, cooking is performed based on the temperature of the temperature detection element 46 in accordance with the cooking pattern input in advance to a power control circuit (not shown) in the operation board 50.
【００３０】（実施例２）第２の実施例の内鍋を図３に
基づき説明する。内鍋以外のその他の構成は第１の実施
例と同様であるので説明を省略する。図において内鍋５
５を、ｔ１．５アルミニウムを絞り熱伝導層５５Ａを形
成し、この熱伝導層５５Ａの外側に、ニッケルの磁性材
料よりなる発熱層５５Ｂを０．２ｍｍ〜０．５ｍｍの厚
さで厚膜メッキにて構成する。さらに熱伝導層５５Ａの
内面にはフッ素コーティング５５Ｃを施している。この
構成により内鍋５５の材料にクラッド材を使う必要がな
くなり、従ってクラッド材を生産する大規模な設備が不
要となるとともに加工性に優れ製造コストが安く、また
熱伝導層と発熱層との剥離やしわが発生がなくなり歩留
まりが向上する。さらに、フェライト系ステンレスを深
絞りする工程がないため、鍋外面にも鮫肌状に荒れるこ
とがなく、従って大規模な磨き行程を廃止でき製造コス
トが削減できる。なお、本実施例では内鍋５５の発熱層
５５Ｂの材料をニッケルにしているが、クロムや鉄など
の磁性材料であっても同様の効果が得られる。(Embodiment 2) An inner pot according to a second embodiment will be described with reference to FIG. Other configurations other than the inner pot are the same as those of the first embodiment, and thus description thereof will be omitted. In the figure, inner pot 5
5, a heat conductive layer 55A is formed by narrowing t1.5 aluminum, and a heat generating layer 55B made of a nickel magnetic material is plated on the outside of the heat conductive layer 55A with a thickness of 0.2 mm to 0.5 mm. It consists of. Further, a fluorine coating 55C is applied to the inner surface of the heat conductive layer 55A. With this configuration, it is not necessary to use a clad material for the material of the inner pot 55. Therefore, a large-scale facility for producing the clad material is not required, the workability is excellent, the production cost is low, and the heat conduction layer and the heat generation layer are not required. No peeling or wrinkles occur, and the yield is improved. Further, since there is no step of deep drawing the ferritic stainless steel, the outer surface of the pot is not roughened like a shark skin, so that a large-scale polishing step can be eliminated and the production cost can be reduced. In this embodiment, the material of the heat generating layer 55B of the inner pot 55 is nickel, but the same effect can be obtained by using a magnetic material such as chromium or iron.
【００３１】（実施例３）第３の実施例の内鍋を図４に
基づき説明する。内鍋以外のその他の構成は第１の実施
例と同様であるので説明を省略する。図において、内鍋
６０を、ｔ１．５アルミニウムを絞り熱伝導層６０Ａを
形成し、この熱伝導層６０Ａの外側の、前記誘導コイル
３８と内鍋６０の対向する近傍部のみにニッケルの磁性
材料よりなる発熱層６０Ｂを０．２ｍｍ〜０．５ｍｍの
厚さで、厚膜メッキにて構成する。さらに熱伝導層６０
Ａの内面にはフッ素コーティング６０Ｃを施している。
この構成により誘導コイル３８から遠く発熱しない発熱
層６０Ｂを無くし、発熱層６０Ｂの重量を削減すること
ができる。従って、軽量で扱いやすく且つ電磁誘導加熱
及び調理の可能な内鍋を実現できる。(Embodiment 3) An inner pot according to a third embodiment will be described with reference to FIG. Other configurations other than the inner pot are the same as those of the first embodiment, and thus description thereof will be omitted. In the figure, the inner pot 60 is formed by squeezing t1.5 aluminum to form a heat conductive layer 60A, and a nickel magnetic material is provided only on the outer side of the heat conductive layer 60A and in the vicinity of the induction coil 38 and the inner pot 60 facing each other. The heat generating layer 60B is formed by thick film plating with a thickness of 0.2 mm to 0.5 mm. Further, the heat conduction layer 60
The inner surface of A is provided with a fluorine coating 60C.
With this configuration, the heat generating layer 60B that does not generate heat far from the induction coil 38 can be eliminated, and the weight of the heat generating layer 60B can be reduced. Therefore, an inner pot that is lightweight, easy to handle, and capable of electromagnetic induction heating and cooking can be realized.
【００３２】（実施例４）第４の実施例の内鍋を図５に
基づき説明する。内鍋以外のその他の構成は第１の実施
例と同様であるので説明を省略する。図において、内鍋
６５を、ｔ１．５アルミニウムを絞り熱伝導層６５Ａを
形成し、この熱伝導層６５Ａの外側をコンタクト４５と
の当接面を除いてニッケルの磁性材料よりなる発熱層６
５Ｂを０．２ｍｍ〜０．５ｍｍの厚さで、厚膜メッキに
て構成する。さらに熱伝導層６０Ａの内面にはフッ素コ
ーティング６５Ｃを施している。内鍋とコンタクト４５
の当接面は熱伝導層６５Ａを露出することにより、鍋底
に剥離が生じ、発熱層６５Ｂが過昇してもその温度を熱
伝導層６５Ａの温度をコンタクト４５が検知し早切れを
防止するため常に安定した炊飯ができる。(Embodiment 4) An inner pot according to a fourth embodiment will be described with reference to FIG. Other configurations other than the inner pot are the same as those of the first embodiment, and thus description thereof will be omitted. In the figure, an inner pan 65 is formed by squeezing t1.5 aluminum to form a heat conductive layer 65A, and the heat conductive layer 6 made of a nickel magnetic material except for the contact surface with the contact 45 outside the heat conductive layer 65A.
5B is formed by thick film plating with a thickness of 0.2 mm to 0.5 mm. Further, a fluorine coating 65C is applied to the inner surface of the heat conductive layer 60A. Inner pot and contact 45
The contact surface exposes the heat conductive layer 65A, and peels off at the bottom of the pot. Even if the heat generating layer 65B rises excessively, the temperature of the heat conductive layer 65A is detected by the contact 45 to prevent premature disconnection. Therefore, stable rice cooking is always possible.
【００３３】（実施例５）第５の実施例の内鍋を図６に
基づき説明する。内鍋以外のその他の構成は第１の実施
例と同様であるので説明を省略する。図において、内鍋
７０を、ｔ１．５アルミニウムを絞り熱伝導層７０Ａを
形成し、この熱伝導層７０Ａの外側の、前記誘導コイル
３８と内鍋７０の対向する近傍部のみに鉄よりなる発熱
層６０Ｂを０．２ｍｍ〜０．５ｍｍの厚さで厚膜メッキ
にし、内鍋７０の外面をすべてニッケルメッキを薄く施
し防腐層７１を形成する。さらに熱伝導層７０Ａの内面
にはフッ素コーティング７０Ｃを施している。(Embodiment 5) An inner pot according to a fifth embodiment will be described with reference to FIG. Other configurations other than the inner pot are the same as those of the first embodiment, and thus description thereof will be omitted. In the drawing, the inner pot 70 is formed by squeezing t1.5 aluminum to form a heat conductive layer 70A, and heat is generated only by iron in the vicinity of the heat conductive layer 70A and in the vicinity of the induction coil 38 and the inner pot 70 facing each other. The layer 60 </ b> B is thick-plated with a thickness of 0.2 mm to 0.5 mm, and the outer surface of the inner pan 70 is entirely nickel-plated to form a preservative layer 71. Further, a fluorine coating 70C is provided on the inner surface of the heat conductive layer 70A.
【００３４】内鍋７０に誘導コイル３８と内鍋７０の対
向する近傍部のみに鉄の厚膜メッキ７０Ｂにて発熱層を
設けることにより、発熱層を最小にすると共に発熱層を
重量単価の高いニッケルやクロム等の金属から重量単価
の安い鉄にすることができる。さらに少なくとも発熱層
７０Ｂ部分にニッケルまたはクロム等の防腐メッキ層７
１を施すことにより信頼性の向上がはかれ、さらに製造
コストが安く且つ軽く扱いやすく信頼性の高い電磁誘導
加熱及び調理の可能な内鍋７０を実現できる。By providing a heat generating layer on the inner pot 70 only in the vicinity of the induction coil 38 and the inner pot 70 opposite to the inner pot 70 by thick film plating 70B of iron, the heat generating layer is minimized and the heat generating layer has a high weight unit cost. It is possible to change iron such as nickel or chromium into iron with a low unit price. Further, an antiseptic plating layer 7 of nickel or chromium is formed on at least the heat generating layer 70B.
By applying 1, it is possible to realize an inner pot 70 that is low in manufacturing cost, light in handling, easy to handle, and highly reliable for electromagnetic induction heating and cooking.
【００３５】（実施例６）第６の実施例の内鍋を図７に
基づき説明する。内鍋以外のその他の構成は第１の実施
例と同様であるので説明を省略する。図において、内鍋
７５を、ｔ０．５のフェライト系ステンレス鋼板を絞り
発熱層７５Ｂを形成し、この発熱層７５Ｂの内側を、前
記誘導コイル３８と内鍋７５の対向する近傍部にアルミ
ニウムによる熱伝導層７５Ａを１．０ｍｍ〜１．５ｍｍ
の厚さで厚膜メッキにて形成する。さらに熱伝導層７５
Ａ及び発熱層７５Ｂ内側の露出面にはフッ素コーティン
グ７０Ｃを連続的に施している。内鍋７５をフェライト
系ステンレス鋼板等の薄板よりなる発熱層７５Ｂの内側
に、アルミニウムよりなる熱伝導層７５Ａを厚膜メッキ
にて構成することにより、熱伝導層７５Ａを最小に抑え
ることができ、丈夫で軽く且つ電磁誘導加熱及び調理の
可能な内鍋を実現できる。(Embodiment 6) An inner pot according to a sixth embodiment will be described with reference to FIG. Other configurations other than the inner pot are the same as those of the first embodiment, and thus description thereof will be omitted. In the figure, the inner pan 75 is drawn by drawing a ferrite stainless steel plate of t0.5 to form a heat generating layer 75B, and the inner side of the heat generating layer 75B is heated by aluminum in the vicinity of the induction coil 38 and the inner pan 75 facing each other. 1.0 mm to 1.5 mm for the conductive layer 75A
And formed by thick film plating. Further, the heat conduction layer 75
A and a fluorine coating 70C are continuously applied to the exposed surfaces inside the heating layer 75B. By forming the inner pan 75 inside the heat generating layer 75B made of a thin plate such as a ferritic stainless steel plate, and forming the heat conductive layer 75A made of aluminum by thick film plating, the heat conductive layer 75A can be minimized. An inner pot that is durable, light, and capable of electromagnetic induction heating and cooking can be realized.
【００３６】なお、本実施例では誘導コイル近傍に熱伝
導層を形成しているが、内鍋内面全体をアルミメッキし
ても同様の効果が得られることは言うまでもない。Although the heat conductive layer is formed in the vicinity of the induction coil in this embodiment, it goes without saying that the same effect can be obtained by plating the entire inner surface of the inner pot with aluminum.
【００３７】さらに第１から第６の実施例において各内
鍋の発熱層および熱伝導層の肉厚は発熱層では各材質に
おける電磁誘導による有効な発熱が得られれば良く、熱
伝導層では前記発熱層で発熱した熱を、被調理物に有効
に伝導できるものであればよい。Further, in the first to sixth embodiments, the thickness of the heat generating layer and the heat conductive layer of each inner pot may be such that effective heat generation by electromagnetic induction in each material can be obtained in the heat generating layer. Any material can be used as long as the heat generated by the heat generating layer can be effectively transmitted to the object to be cooked.
【００３８】[0038]
【発明の効果】以上のように、請求項１記載の発明によ
れば、内鍋をアルミニウムよりなる熱伝導層の外側に、
磁性材料よりなる発熱層を厚膜メッキにて構成すること
により、内鍋の材料にクラッド材を使う必要がなくな
り、従ってクラッド材を生産する大規模な設備が不要と
なるとともに加工性に優れ製造コストが安くなり、熱伝
導層と発熱層との剥離やしわが発生がなく歩留まりが向
上するとともに大規模な磨き行程を廃止でき製造コスト
が削減できるものである。As described above, according to the first aspect of the present invention, the inner pot is placed outside the heat conductive layer made of aluminum.
By forming the heat generating layer made of magnetic material by thick film plating, it is not necessary to use clad material for the material of the inner pot, so large-scale equipment for producing clad material is not required and it is excellent in workability and manufacturing The cost can be reduced, the yield can be improved without occurrence of peeling or wrinkling between the heat conductive layer and the heat generating layer, and a large-scale polishing step can be eliminated to reduce the manufacturing cost.
【００３９】また、請求項２記載の発明によれば、内鍋
をフェライト系ステンレス鋼板等の薄板よりなる発熱層
の内側に、アルミニウムよりなる熱伝導層を厚膜メッキ
にて構成することにより、熱伝導層を最小に抑えること
ができ、丈夫で軽く且つ電磁誘導加熱及び調理の可能な
内鍋を実現できるものである。According to the second aspect of the present invention, the inner pot is formed by a thick film plating of a heat conductive layer made of aluminum inside the heat generating layer made of a thin plate such as a ferritic stainless steel plate. The heat conduction layer can be minimized, and a durable and light inner pot capable of electromagnetic induction heating and cooking can be realized.
【００４０】また、請求項３記載の発明によれば、誘導
コイルに対向する近傍部の熱伝導層の厚みを他の部分よ
り厚くしたことにより、調理物がより均一に加熱され調
理性能が向上する。According to the third aspect of the present invention, the thickness of the heat conductive layer in the vicinity of the induction coil is made thicker than the other portions, so that the cooked food is more uniformly heated and the cooking performance is improved. I do.
【００４１】また、請求項４記載の発明によれば、少な
くとも発熱部材部分にニッケルまたはクロム等の防腐メ
ッキを施すことにより信頼性の向上がはかれ、さらに製
造コストが安く且つ軽く扱いやすく信頼性の高い電磁誘
導加熱及び調理の可能な内鍋を実現できるものである。According to the fourth aspect of the present invention, at least the heat-generating member portion is provided with antiseptic plating such as nickel or chromium, thereby improving reliability. It is possible to realize an inner pot capable of high-frequency electromagnetic induction heating and cooking.
【００４２】また、請求項５記載の発明によれば、内鍋
の誘導コイルと内鍋の対向する近傍部のみに発熱層を設
けることにより、誘導コイルから離れ発熱しない発熱層
を無くし、発熱層の重量を削減することができる。従っ
て、軽量で扱いやすく且つ電磁誘導加熱及び調理の可能
な内鍋を実現できるものである。また、内鍋に誘導コイ
ルと内鍋の対向する近傍部のみに鉄の厚膜メッキにて発
熱部材を設けることにより、発熱層を最小にすると共に
発熱層を重量単価の高いニッケルやクロム等の金属から
重量単価の安い鉄にすることができる。According to the fifth aspect of the present invention, the heat generating layer is provided only in the vicinity of the induction coil of the inner pan and the inner pan opposite to each other, thereby eliminating the heat generation layer which is separated from the induction coil and does not generate heat. Weight can be reduced. Therefore, an inner pot that is lightweight, easy to handle, and capable of electromagnetic induction heating and cooking can be realized. In addition, by providing a heating member by thick film plating of iron only in the vicinity of the inner pot facing the induction coil and the inner pot, the heating layer is minimized and the heating layer is made of nickel, chromium, etc., which are expensive in weight. Iron can be changed from metal to cheap iron.
【００４３】さらに、請求項６記載の発明によれば、内
鍋と温度検知装置の当接面は熱伝導層を露出することに
より、鍋底に剥離が生じて、発熱層が過昇してもその温
度を熱伝導層の温度を温度検知装置が検知し早切れを防
止するため常に安定した炊飯ができる。According to the sixth aspect of the present invention, the contact surface between the inner pot and the temperature detecting device exposes the heat conductive layer, so that the bottom of the pot is peeled off and the heating layer rises excessively. The temperature of the heat conductive layer is detected by the temperature detecting device to prevent the temperature from being quickly cut, so that stable rice cooking can be always performed.
【図１】本発明の第１の実施例の炊飯器の縦断面図FIG. 1 is a longitudinal sectional view of a rice cooker according to a first embodiment of the present invention.
【図２】同、炊飯器の内鍋と誘導コイルの縦断面図FIG. 2 is a vertical sectional view of an inner pot and an induction coil of the rice cooker.
【図３】本発明の第２の実施例の炊飯器の内鍋の縦断面
図FIG. 3 is a longitudinal sectional view of an inner pot of a rice cooker according to a second embodiment of the present invention.
【図４】本発明の第３の実施例の炊飯器の内鍋と誘導コ
イルの縦断面図FIG. 4 is a longitudinal sectional view of an inner pot and an induction coil of a rice cooker according to a third embodiment of the present invention.
【図５】本発明の第４の実施例の炊飯器の内鍋の縦断面
図FIG. 5 is a longitudinal sectional view of an inner pot of a rice cooker according to a fourth embodiment of the present invention.
【図６】本発明の第５の実施例の炊飯器の内鍋と誘導コ
イルの縦断面図FIG. 6 is a longitudinal sectional view of an inner pot and an induction coil of a rice cooker according to a fifth embodiment of the present invention.
【図７】本発明の第６の実施例の炊飯器の内鍋と誘導コ
イルの縦断面図FIG. 7 is a longitudinal sectional view of an inner pot and an induction coil of a rice cooker according to a sixth embodiment of the present invention.
【図８】従来の炊飯器の縦断面図FIG. 8 is a longitudinal sectional view of a conventional rice cooker.
３０ 本体 ３３ コイルベース ３６、５５、６０、６５、７０、７５ 内鍋 ３６Ａ、５５Ａ、６０Ａ、６５Ａ、７０Ａ、７５Ａ 熱
伝導層 ３６Ｂ、５５Ｂ、６０Ｂ、６５Ｂ、７０Ｂ、７５Ｂ 発
熱層 ３８ 誘導コイル ４１ 温度検知装置 ４８ 回路基板 ７１ 防腐層Reference Signs List 30 main body 33 coil base 36, 55, 60, 65, 70, 75 inner pot 36A, 55A, 60A, 65A, 70A, 75A heat conductive layer 36B, 55B, 60B, 65B, 70B, 75B heat generating layer 38 induction coil 41 temperature Detector 48 Circuit board 71 Preservative layer
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) A47J 27/00 - 36/02 H05B 6/12 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) A47J 27/00-36/02 H05B 6/12
Claims (6)
磁性材料よりなる発熱層を厚膜メッキしてなる内鍋を備
えた電磁誘導炊飯器。1. An electromagnetic induction rice cooker having an inner pot formed by thickly plating a heat generating layer made of a magnetic material on the outside of a heat conductive layer made of aluminum.
ニウムよりなる熱伝導層を厚膜メッキしてなる内鍋を備
えた電磁誘導炊飯器。2. An electromagnetic induction rice cooker having an inner pot formed by plating a heat conductive layer made of aluminum with a thick film inside a heat generating layer made of a magnetic material.
部の厚みを他の部分より厚くしてなる請求項１または２
記載の電磁誘導炊飯器。3. The heat conductive layer is formed so that the thickness of a portion near the induction coil is thicker than other portions.
The described electromagnetic induction rice cooker.
メッキを施してなる請求項１または２記載の電磁誘導炊
飯器。4. The electromagnetic induction rice cooker according to claim 1, wherein the heat generating layer is provided with an antiseptic plating of nickel or the like on its outside.
にのみ設けられてなる請求項１または２記載の電磁誘導
炊飯器。5. The electromagnetic induction rice cooker according to claim 1, wherein the heat generating layer is provided only in a vicinity portion facing the induction coil.
え、前記内鍋と温度検知装置の当接面は熱伝導層が露出
してなる請求項１または２記載の電磁誘導炊飯器。6. The electromagnetic induction rice cooker according to claim 1, further comprising a temperature detecting device for detecting a temperature of the inner pot, wherein a heat conductive layer is exposed at a contact surface between the inner pot and the temperature detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6264897A JP3171133B2 (en) | 1997-03-17 | 1997-03-17 | Electromagnetic induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6264897A JP3171133B2 (en) | 1997-03-17 | 1997-03-17 | Electromagnetic induction cooker |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9758293A Division JP2776194B2 (en) | 1993-04-23 | 1993-04-23 | Electromagnetic induction cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09224819A JPH09224819A (en) | 1997-09-02 |
| JP3171133B2 true JP3171133B2 (en) | 2001-05-28 |
Family
ID=13206370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6264897A Expired - Lifetime JP3171133B2 (en) | 1997-03-17 | 1997-03-17 | Electromagnetic induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3171133B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100339980B1 (en) * | 1999-11-10 | 2002-06-10 | 김종기 | Direct Heating Type Electric Cooker |
| KR20030034484A (en) * | 2001-10-23 | 2003-05-09 | 엘지전자 주식회사 | Induction heating type rice pot |
| KR20030034485A (en) * | 2001-10-23 | 2003-05-09 | 엘지전자 주식회사 | Induction heating type rice pot |
-
1997
- 1997-03-17 JP JP6264897A patent/JP3171133B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09224819A (en) | 1997-09-02 |
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