JPH04220990A - Deep pan for induction heating cooking apparatus - Google Patents
Deep pan for induction heating cooking apparatusInfo
- Publication number
- JPH04220990A JPH04220990A JP40414190A JP40414190A JPH04220990A JP H04220990 A JPH04220990 A JP H04220990A JP 40414190 A JP40414190 A JP 40414190A JP 40414190 A JP40414190 A JP 40414190A JP H04220990 A JPH04220990 A JP H04220990A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- magnetic metal
- pot
- metal material
- induction heating
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 54
- 230000006698 induction Effects 0.000 title claims abstract description 35
- 238000010411 cooking Methods 0.000 title claims abstract description 27
- 230000035515 penetration Effects 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 239000007769 metal material Substances 0.000 abstract description 47
- 230000000694 effects Effects 0.000 abstract description 6
- 230000013011 mating Effects 0.000 abstract 1
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 230000005389 magnetism Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 229910000990 Ni alloy Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、誘導加熱調理器用鍋に
関し、特に自己温度制御機能を有する鍋に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pot for induction heating cookers, and more particularly to a pot having a self-temperature control function.
【0002】0002
【従来の技術】誘導加熱調理器はトッププレートの下側
に加熱コイルを配置し、前記加熱コイルで生じた磁力線
によりトップフレート上の誘導加熱調理器用鍋の底面内
に渦電流出を起こし発熱させるようになっている。[Prior Art] In an induction heating cooker, a heating coil is arranged under the top plate, and the lines of magnetic force generated by the heating coil cause an eddy current to flow in the bottom of the pot for the induction heating cooker on the top plate, generating heat. It looks like this.
【0003】このような誘導加熱調理器用鍋としては、
従来、ガスなどで使用されていた一般の鍋のうち金属製
のものが加熱に供されていた。しかしその場合、通常調
理において鍋の電気的特性は一定であるため、一定の火
力で加熱が続けられ、過熱防止や自動温度調節のために
はトッププレートを介して配置された温度検知手段(サ
ーミスタやバイメタルサーモスタットなど)の出力で誘
導加熱出力を増減して制御していた。[0003] As such a pot for an induction heating cooker,
Traditionally, metal pots have been used for heating in general gas pots. However, in this case, the electrical characteristics of the pot are constant during normal cooking, so heating continues at a constant firepower, and in order to prevent overheating and automatically adjust the temperature, a temperature sensing means (thermistor) placed through the top plate is required. The induction heating output was controlled by increasing or decreasing the output of the induction heating device (such as a thermostat or a bimetallic thermostat).
【0004】0004
【発明が解決しようとする課題】しかし、このような加
熱出力制御方法では、トッププレートに使用されている
結晶化ガラスを介して鍋の温度を検知しているため、調
理用鍋の実際の温度とサーミスターの感受温度との温度
差が大きく熱応答性や検知精度が悪かった。そのため空
炊きなど異常使用状態では完全に温度制御することがで
きず、鍋中の油が発火したり、金属材料を使用した鍋で
は底面の著しいソリや変形などの問題が発生していた。[Problem to be Solved by the Invention] However, in this heating output control method, the temperature of the cooking pot is detected through the crystallized glass used in the top plate, so the actual temperature of the cooking pot cannot be detected. There was a large temperature difference between the temperature and the temperature sensitive to the thermistor, resulting in poor thermal response and detection accuracy. As a result, under abnormal usage conditions such as dry cooking, the temperature could not be completely controlled, causing problems such as the oil in the pot catching fire, and pots made of metal causing severe warping or deformation of the bottom.
【0005】また、従来の温度検知では鍋底の一部分の
温度を検知するので、鍋の置き方や調理材料を偏って入
れた場合などでは検知精度が悪くなっていた。さらに、
空炊き時の鍋底の温度上昇と通常調理での温度上昇は鍋
底の部位により大きく変動するので、各種の使用条件で
常に精度良く鍋温度を検知することは極めて困難であっ
た。Furthermore, since conventional temperature detection detects the temperature of a portion of the bottom of the pot, the detection accuracy deteriorates depending on how the pot is placed or when cooking ingredients are placed unevenly. moreover,
Since the temperature rise at the bottom of the pot during dry cooking and the temperature rise during normal cooking vary greatly depending on the part of the bottom of the pot, it has been extremely difficult to always accurately detect the pot temperature under various usage conditions.
【0006】本発明は上記従来の課題を解決しようとす
るもので、鍋そのものが自己温度制御機能を有する誘導
加熱調理器用鍋の実現により、常に高い安全性と高精度
な温度調節を提供するものである。[0006] The present invention aims to solve the above-mentioned conventional problems, and provides a constant high level of safety and highly accurate temperature control by realizing a pot for an induction heating cooker in which the pot itself has a self-temperature control function. It is.
【0007】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明の誘導加熱調理器用鍋は、調理に使用される温
度にキュリー温度を設定し、キュリー温度の前後で鍋の
高周波電気抵抗が変化する温度依存性磁性金属材料と非
磁性金属材料を一体形成した鍋により、所望の温度を越
えないよう自動制御する鍋を実現したものである。[Means for Solving the Problems] In order to achieve the above object, the induction cooking pot of the present invention has a Curie temperature set at the temperature used for cooking, and the high frequency electrical resistance of the pot is set before and after the Curie temperature. By using a pot that is integrally formed with a variable temperature-dependent magnetic metal material and a non-magnetic metal material, a pot that automatically controls the temperature so that it does not exceed a desired temperature has been realized.
【0008】[0008]
【作用】本発明では誘導加熱調理器に供される鍋の材質
にキュリー温度を有する磁性金属材料を使用し、キュリ
ー温度以下では磁性金属材料に渦電流が流れ、渦電流損
により発熱させる。[Operation] In the present invention, a magnetic metal material having a Curie temperature is used as the material of the pot used in the induction heating cooker, and when the temperature is below the Curie temperature, eddy current flows through the magnetic metal material, causing heat generation due to eddy current loss.
【0009】このとき鍋底に流れる渦電流は加熱コイル
に近い表面に集中し、金属の中にいくにつれて電流が流
れにくくなる性質を持ち、表面電流に対し一定の値に減
少する時の表面からの深さを浸透深さと言い次式で表さ
れる。[0009] At this time, the eddy current flowing at the bottom of the pot concentrates on the surface near the heating coil, and as it goes deeper into the metal, it becomes difficult for the current to flow. The depth is called the penetration depth and is expressed by the following formula.
【0010】0010
【数1】[Math 1]
【0011】
浸透深さ以上の点では渦電流が少ないので交番磁界
の影響も少なく、浸透深さ以上の厚みを持つ金属の内側
に別の金属があっても全体の動作に大きく影響を与えな
い。[0011] Since there are few eddy currents at points above the penetration depth, there is little effect of alternating magnetic fields, and even if there is another metal inside a metal whose thickness is above the penetration depth, it does not greatly affect the overall operation. .
【0012】一方、浸透深さ以下の金属ではその内側に
も磁界の影響があるので、内側にある金属の影響が全体
の誘導加熱に影響を与える。On the other hand, since the metal below the penetration depth is also affected by the magnetic field, the effect of the metal on the inside affects the overall induction heating.
【0013】本発明の構成の鍋において、鍋の温度がキ
ュリー温度以下では加熱コイルから放射された超可超周
波数交番磁束は外側の磁性金属材料に流れているが、そ
の透磁率が高いので交番磁束により誘起された渦電流は
表皮効果により鍋の底側に集中する。In the pot constructed according to the present invention, when the temperature of the pot is below the Curie temperature, the ultra-high frequency alternating magnetic flux radiated from the heating coil flows into the outer magnetic metal material, but because of its high magnetic permeability, the alternating Eddy currents induced by magnetic flux concentrate on the bottom side of the pot due to the skin effect.
【0014】この結果、渦電流は磁性金属材料の表面(
鍋の底側)に集中的に流れるので鍋の電気抵抗は等価的
に大きくなり、渦電流によって発生するジュール熱が大
きく、誘導加熱の発熱量は大きくなる。このとき磁性金
属材料の厚みは常温での浸透深さ以上なければ通常でも
非磁性金属材料の影響を受けて十分な誘導加熱出力が得
られない。As a result, the eddy current flows on the surface of the magnetic metal material (
Since the flow concentrates on the bottom side of the pot, the electrical resistance of the pot becomes equivalently large, the Joule heat generated by the eddy current increases, and the amount of heat generated by induction heating increases. At this time, unless the thickness of the magnetic metal material exceeds the penetration depth at room temperature, sufficient induction heating output cannot be obtained even under normal conditions due to the influence of the non-magnetic metal material.
【0015】一方、キュリー温度以上では磁性金属材料
は磁性を失うので、透磁率が低くなり渦電流の浸透深さ
(表面電流が一定率に下がるまでの表面からの深さ)が
深くなる。このため、磁性金属材料の底側表面にのみ流
れていた渦電流は磁性金属材料(キュリー温度を越えて
いるので磁性は失っているが)のさらに内部に流れるよ
うになり、その結果、電気抵抗値が大幅に低下するので
ジュール熱も大幅に低下する。この様にキュリー温度前
後での誘導加熱出力を制御することができる。On the other hand, above the Curie temperature, the magnetic metal material loses its magnetism, so its magnetic permeability decreases and the penetration depth of eddy currents (the depth from the surface until the surface current decreases to a constant rate) increases. For this reason, the eddy current that was flowing only on the bottom surface of the magnetic metal material now flows further inside the magnetic metal material (although it has lost its magnetism because it has exceeded the Curie temperature), resulting in an electrical resistance Since the value decreases significantly, the Joule heat also decreases significantly. In this way, the induction heating output can be controlled around the Curie temperature.
【0016】さらに、磁性金属材料の厚みがキュリー温
度以上での浸透深さより薄い場合には、キュリー温度を
越えたときに磁束が磁性金属材料を貫通して非磁性金属
材料に到達するので、電気抵抗の少ない非磁性金属材料
によりジュール熱の発生はさらに低下し、キュリー温度
前後での発熱量の変化がさらに大きくなって制御上好都
合である。Furthermore, if the thickness of the magnetic metal material is thinner than the penetration depth above the Curie temperature, the magnetic flux will penetrate the magnetic metal material and reach the non-magnetic metal material when the Curie temperature is exceeded. The generation of Joule heat is further reduced by using a non-magnetic metal material with low resistance, and the change in the amount of heat generated around the Curie temperature is further increased, which is convenient for control.
【0017】磁性の変化による電気抵抗値の変化の様子
を試験に供した感温ステンレスの場合で説明する。[0017] The manner in which the electrical resistance value changes due to a change in magnetism will be explained using the case of a temperature-sensitive stainless steel that was subjected to a test.
【0018】[0018]
【表1】[Table 1]
【0019】(表1)で分かるように、同じ特性の金属
であっても磁性体か否かでは電気抵抗が10分の1に低
下する。換言すれば、鍋底に発生するジュール熱は電気
抵抗に比例するので、磁性を失うことにより発生する熱
量は10分の1に低下する。ここで、磁性金属材料の厚
みが浸透深さより薄いと常温時に交番磁束が磁性金属材
料を大量に貫通し非磁性金属材料へ到達するので、キュ
リー温度を越えたときの出力との差が狭くなり火力の制
御幅が小さくなり、磁性金属材料の厚みは常温時の浸透
深さ以上の厚さが必要である。As can be seen from Table 1, even if the metal has the same characteristics, the electrical resistance decreases to one-tenth depending on whether it is magnetic or not. In other words, since the Joule heat generated at the bottom of the pot is proportional to the electrical resistance, the amount of heat generated by losing magnetism is reduced to one-tenth. Here, if the thickness of the magnetic metal material is thinner than the penetration depth, a large amount of alternating magnetic flux will penetrate the magnetic metal material at room temperature and reach the non-magnetic metal material, so the difference between the output when it exceeds the Curie temperature will become narrower. The control range of heating power becomes narrower, and the thickness of the magnetic metal material needs to be greater than the penetration depth at room temperature.
【0020】さらに、磁性金属材料の厚みを高温時の浸
透深さ以下にするとキュリー温度以上では非磁性金属材
料にも磁束が到達するためジュール熱が大きく低下し制
御範囲を広くすることが可能である。Furthermore, if the thickness of the magnetic metal material is made below the penetration depth at high temperatures, the magnetic flux will reach even the non-magnetic metal material at temperatures above the Curie temperature, which will greatly reduce the Joule heat and make it possible to widen the control range. be.
【0021】ここで加熱動作の変化の様子を順を追って
説明する。 まず、常温から加熱を開始するとキュリ
ー温度になるまでは大きな発熱量で加熱し、その結果、
鍋がキュリー温度に達すると鍋自体が自動的に特性を変
化し発生する発熱量が少なくなる。そして、鍋の温度が
低下しキュリー温度以下になると、金属材料が再び磁性
を取り戻し、大きな発熱量での加熱を再開する。[0021] Here, the changes in the heating operation will be explained step by step. First, when heating starts from room temperature, it heats with a large amount of heat until it reaches the Curie temperature, and as a result,
When the pot reaches its Curie temperature, the pot automatically changes its characteristics and generates less heat. Then, when the temperature of the pot drops below the Curie temperature, the metal material regains its magnetism and resumes heating with a large amount of heat.
【0022】ここで、鍋の磁性金属材料のキュリー温度
を所望の設定温度に選ぶと、上述した動作により発熱量
のコントロールを鍋自身が自動的に行なうことができ、
このような理由によりキュリー温度を制御したい温度に
精度良く制御することが可能となる。[0022] Here, when the Curie temperature of the magnetic metal material of the pot is selected to a desired set temperature, the pot itself can automatically control the amount of heat generated by the above-mentioned operation.
For these reasons, it becomes possible to precisely control the Curie temperature to a desired temperature.
【0023】特に油を使用する鍋として用いる場合は高
温調理温度である180〜280℃程度のキュリー温度
を持つ磁性金属材料が最適である。この温度は材料の組
成を調節することによって自在に設定できるので、調理
メニューにより適切に選べる。その一例として、キュリ
ー温度を100℃に選べば水が沸騰したら自動的に加熱
を中断し、沸騰後の水の無駄な蒸発を防止するやかんが
実現できる。[0023] In particular, when used as a pot using oil, a magnetic metal material having a Curie temperature of about 180 to 280°C, which is a high-temperature cooking temperature, is optimal. This temperature can be freely set by adjusting the composition of the ingredients, so it can be selected appropriately depending on the cooking menu. For example, if the Curie temperature is set to 100°C, a kettle that automatically stops heating when water boils and prevents unnecessary evaporation of water after boiling can be realized.
【0024】また、キュリー温度を有する磁性金属材料
としてニッケル合金、鉄クロム系合金がキュリー温度を
自由に変えることができると共に発熱量を決定する表皮
抵抗が大きいため最適であり、非磁性金属材料としては
アルミ、銅や鏡等の材料及びそれらの合金が熱伝導率が
高い上に調理容器としての要素を備えてており、本発明
に適用する上でも適切である。[0024] Nickel alloys and iron-chromium alloys are suitable as magnetic metal materials having a Curie temperature because they allow the Curie temperature to be freely changed and have a large skin resistance that determines the amount of heat generated. Materials such as aluminum, copper, mirrors, etc., and alloys thereof have high thermal conductivity and also function as a cooking container, and are suitable for application to the present invention.
【0025】[0025]
【実施例】以下、本発明の具体的な実施例について添付
図面に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
【0026】図1は本発明の誘導加熱調理器用鍋の一実
施例の断面図である。1は耐熱性絶縁物3の上に載置さ
れた板厚3mmの誘導加熱調理器用鍋であり、円盤状の
加熱コイル2に対向して置かれる。鍋1は非磁性金属材
料であり、熱伝導のよいアルミで構成された本体部分1
aと180度のキュリー温度を有するニッケル合金であ
る常温磁性金属材料1bで構成されている。一般に磁性
金属材料は熱伝導率が低いために、調理容器としては温
度むらにつながるが、本発明では熱伝導のよい非磁性金
属材料の本体部分1aを一体形成しているため温度の均
一化が図られている。FIG. 1 is a cross-sectional view of one embodiment of the induction cooking pot of the present invention. Reference numeral 1 denotes a pot for an induction heating cooker having a plate thickness of 3 mm, which is placed on a heat-resistant insulator 3, and is placed facing the disc-shaped heating coil 2. The pot 1 is made of a non-magnetic metal material, and the main body part 1 is made of aluminum with good heat conduction.
a and a room temperature magnetic metal material 1b which is a nickel alloy having a Curie temperature of 180 degrees. In general, magnetic metal materials have low thermal conductivity, which leads to uneven temperatures when used as a cooking container, but in the present invention, the body portion 1a is integrally formed of a non-magnetic metal material with good thermal conductivity, so the temperature can be made uniform. It is planned.
【0027】実施例での構成は磁性金属材料1bは厚み
0.5mmで、Ni40パーセント、Cr 8パーセ
ント、Fe 52パーセントのNi合金であり、非磁
性金属材料1aは2.5mmの厚みのアルミニウムであ
る。従って、作用にて既述の様に常温での浸透深さは約
0.28mmでキュリー温度を越えると2.75mmに
変化し、磁性金属材料の厚みは常温での浸透深さの約2
倍で高温時の浸透深さの約0.2倍である。In the embodiment, the magnetic metal material 1b has a thickness of 0.5 mm and is a Ni alloy containing 40% Ni, 8% Cr, and 52% Fe, and the non-magnetic metal material 1a is aluminum with a thickness of 2.5 mm. be. Therefore, as mentioned above, the penetration depth at room temperature is about 0.28 mm, which changes to 2.75 mm when the Curie temperature is exceeded, and the thickness of the magnetic metal material is about 2 of the penetration depth at room temperature.
This is approximately 0.2 times the penetration depth at high temperatures.
【0028】本発明の誘導加熱調理器用鍋1の評価をす
るために、本発明の誘導加熱調理器用鍋1に油を入れ、
これを誘導加熱調理器のトッププレート2の上に置きて
んぷら調理を行った。このときの状態を図2にしたがっ
て説明する。aのタイミングで油を入れた鍋1の常温磁
性金属材料1bを誘導加熱し始める。常温磁性金属材料
1bで発生した熱は本体部分1aに伝導し油を加熱する
。そのときの誘導加熱の出力は1200Wである。その
後、一定した火力で継続加熱されるので油温はほぼ直線
的に上昇し、鍋温度が予め設定された180℃のキュリ
ー温度に達すると、鍋1は急速に非磁性体に変化し、誘
導加熱の出力は250Wに低下する。低下したときの出
力値(この場合は250W)は、磁性金属材料の本体部
分1aの材質や厚み・形状などで可変する事が可能であ
る。鍋1がキュリー温度に達した後は火力が大幅に低下
するので油温は徐々に175℃(c点)まで低下し続け
る。このとき常温磁性金属材料1bが再び磁性を復活す
るので、火力は再び1200Wに自動的に上昇し油温は
急速にキュリー温度の180℃に向かって上昇する。
油の中にてんぷら等の食材を投入して鍋の温度が175
℃に低下した場合も同様に火力が自動的に入・切され、
油温を一定に保つ。In order to evaluate the induction cooking pot 1 of the present invention, oil was put into the induction cooking pot 1 of the present invention.
This was placed on top plate 2 of an induction heating cooker and tempura cooking was performed. The state at this time will be explained with reference to FIG. At timing a, induction heating of the room temperature magnetic metal material 1b in the pot 1 containing oil is started. The heat generated in the room temperature magnetic metal material 1b is conducted to the main body portion 1a and heats the oil. The output of induction heating at that time was 1200W. After that, the oil temperature rises almost linearly as it continues to be heated with a constant firepower, and when the pot temperature reaches the preset Curie temperature of 180℃, the pot 1 rapidly changes to a non-magnetic material, and the oil temperature increases almost linearly. The heating power is reduced to 250W. The output value when the power decreases (250 W in this case) can be varied depending on the material, thickness, shape, etc. of the main body portion 1a made of magnetic metal material. After the pot 1 reaches the Curie temperature, the heat power is significantly reduced and the oil temperature continues to gradually drop to 175°C (point c). At this time, the room-temperature magnetic metal material 1b restores its magnetism again, so the heating power automatically rises to 1200 W again and the oil temperature rapidly rises toward the Curie temperature of 180°C. Add ingredients such as tempura to the oil until the temperature of the pot reaches 175.
Similarly, if the temperature drops to ℃, the firepower will be turned on and off automatically.
Keep oil temperature constant.
【0029】なお、一般的に誘導加熱調理器には小物発
熱防止が施されており、通常の鍋に対して入力値が大幅
に少ない場合は加熱を自動的に停止する。上記実施例で
キュリー温度を越えた場合の入力が小物検知レベルより
少なかった場合には、一旦加熱を中止するが所定時間(
通常1〜3秒)経過後には自動的に再起動し鍋温度が1
75℃以下であれば1200Wで加熱を自動的に開始す
る。また、鍋温度が175℃に低下していない場合は、
入力が少ないので再度小物検知により加熱が中断される
。従って、鍋の特性でキュリー温度を越えたときの入力
が変化するが、小物検知レベルより高くても低くても鍋
温度の自動制御が可能である。[0029] Generally, induction heating cookers are equipped with a mechanism to prevent small objects from generating heat, and if the input value is significantly lower than that of a normal pot, heating is automatically stopped. In the above example, if the input exceeds the Curie temperature and is less than the small object detection level, heating is temporarily stopped, but for a predetermined period of time (
After 1 to 3 seconds (usually 1 to 3 seconds) have passed, it will automatically restart and the pot temperature will rise to 1.
If the temperature is 75°C or lower, heating is automatically started at 1200W. Also, if the pot temperature has not decreased to 175℃,
Since there is little input, heating is interrupted again when a small object is detected. Therefore, although the input when the temperature exceeds the Curie temperature changes depending on the characteristics of the pot, automatic control of the pot temperature is possible even if it is higher or lower than the small object detection level.
【0030】図1の実施例では非磁性金属材料と磁性金
属材料を一体形成したクラッド板を絞って加工した構造
の鍋に基づいて説明したが、図3に示すようにアルミ製
の鍋4aの底部分(加熱コイルに対抗する部分)に磁性
金属材料4bを装着あるいは爆着により一体形成して鍋
4を構成してもよく、図1と全く同様の働きが得られる
。この実施例では、鍋底の強度が高いので空炊きなどで
も底が常にフラットであり、トッププレートに載せても
安定している上に鍋の計量化が図れるので極めて好都合
である。In the embodiment shown in FIG. 1, the explanation is based on a pot having a structure in which a clad plate integrally formed with a non-magnetic metal material and a magnetic metal material is pressed, but as shown in FIG. 3, an aluminum pot 4a is used. The pot 4 may be constructed by attaching a magnetic metal material 4b to the bottom portion (the portion opposing the heating coil) or integrally forming it by explosive bonding, and the same function as in FIG. 1 can be obtained. In this embodiment, the strength of the bottom of the pot is high, so the bottom is always flat even when the pot is empty, and it is stable even when placed on the top plate, and the pot can be weighed, which is very convenient.
【0031】このように本発明の誘導加熱調理器用鍋は
自己温度制御機能を有し、調理性能を高めたり、油の発
火などの安全性を高めることに加えて温度分布が少なく
なるなど安全性と調理性能の著しい効果が期待出来る。[0031] As described above, the induction cooking pot of the present invention has a self-temperature control function, which not only improves cooking performance and safety from oil ignition, but also improves safety by reducing temperature distribution. A significant effect on cooking performance can be expected.
【0032】また、キュリー温度を有する磁性金属材料
としてニッケル合金を使用したがこれに限定されるもの
ではなく、設定温度や機械的強度・加工性などにより適
宜選ぶことができる。Further, although a nickel alloy is used as a magnetic metal material having a Curie temperature, the material is not limited to this, and can be appropriately selected depending on the set temperature, mechanical strength, workability, etc.
【0033】さらにキュリー温度として180度につい
て説明したがこれについても特にこの温度に限定される
ものでなく、例えばやかん用には100℃であったり鉄
板焼用には260℃のキュリー温度にするなど調理上要
求される所望の温度を選べばよい。Furthermore, although 180 degrees has been explained as the Curie temperature, it is not limited to this temperature, for example, the Curie temperature can be set to 100 degrees Celsius for a kettle or 260 degrees Celsius for a teppanyaki grill. The desired temperature required above can be selected.
【0034】[0034]
【発明の効果】以上の説明から明かなように、本発明の
誘導加熱調理器用鍋によれば以下の効果がある。[Effects of the Invention] As is clear from the above description, the induction cooking pot of the present invention has the following effects.
【0035】(1)設定された温度に達するまでは最大
出力で加熱するので立ち上がり時間(予熱時間)を最短
にできる。(1) Since heating is performed at maximum output until the set temperature is reached, the start-up time (preheating time) can be minimized.
【0036】(2)誘導加熱であるので熱容量がないの
で、設定温度に達した後の鍋温度にオーバーシュートが
ない。(2) Since induction heating is used, there is no heat capacity, so there is no overshoot in the pan temperature after reaching the set temperature.
【0037】(3)食材の投入などで鍋温度が急激に低
下しても、時間遅れなく最大火力で加熱が自動的に開始
され温度精度が極めて良い。(3) Even if the temperature of the pot drops suddenly due to the addition of food, heating is automatically started at the maximum heating power without any time delay, and the temperature accuracy is extremely high.
【0038】(4)誘導加熱調理器本体の温度検知精度
に依存しないので、鍋と本体の組合せが自由である。
(調理器本体が変わっても一定の温度精度が得られる)
(5)鍋底の平均温度で作用するので、鍋の置き方や材
料の偏り等により精度や動作が影響されない。(4) Since it does not depend on the temperature detection accuracy of the induction heating cooker body, the combination of the pot and the body is free. (Constant temperature accuracy can be obtained even if the cooker itself changes)
(5) Since it works based on the average temperature of the bottom of the pot, accuracy and operation are not affected by the way the pot is placed or the unevenness of the ingredients.
【0039】(6)非磁性金属材料は熱伝導が良いので
、調理物への温度むらが少ない。(6) Since non-magnetic metal materials have good thermal conductivity, there is little temperature unevenness to the food being cooked.
【図1】本発明の一実施例の誘導加熱調理器用鍋の断面
図FIG. 1 is a sectional view of a pot for an induction heating cooker according to an embodiment of the present invention.
【図2】同動作の説明図[Figure 2] Explanatory diagram of the same operation
【図3】他の実施例を示す誘導加熱調理器用鍋の断面図
[Fig. 3] Cross-sectional view of a pot for induction heating cooker showing another embodiment
1,4 誘導加熱調理器用鍋1a,4a
本体部分(非磁性金属材料)1b,4b 常温磁性金
属材料
2 加熱コイル1, 4 Pot for induction heating cooker 1a, 4a
Main body part (non-magnetic metal material) 1b, 4b Room temperature magnetic metal material 2 Heating coil
Claims (2)
外側の、少なくとも加熱コイルに対向した部分に所定の
キュリー温度を有した常温磁性金属を一体形成し、前記
常温磁性金属の厚みがキュリー温度以下での渦電流の浸
透深さ以上である誘導加熱調理器用鍋。1. A cold magnetic metal having a predetermined Curie temperature is integrally formed on the outside of a cooking container made of a non-magnetic metal, at least in a portion facing a heating coil, and the cold magnetic metal has a thickness of a Curie temperature. A pot for induction heating cookers whose penetration depth is greater than or equal to the eddy current penetration depth at temperatures below.
調理用容器の外側の、少なくとも加熱コイルに対向した
部分に所定のキュリー温度を有した常温磁性金属を一体
形成し、前記常温磁性金属の厚みがキュリー温度以下で
の渦電流の浸透深さ以上でかつキュリー温度以上での浸
透深さ以下である誘導加熱調理器用鍋。2. A room-temperature magnetic metal having a predetermined Curie temperature is integrally formed on at least the portion facing the heating coil on the outside of the cooking container made of a non-magnetic and highly thermally conductive metal, and the room-temperature magnetic metal has a prescribed Curie temperature. A pot for an induction heating cooker, wherein the thickness of the metal is greater than the penetration depth of an eddy current at a temperature below the Curie temperature and below the penetration depth at a temperature above the Curie temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40414190A JP2917526B2 (en) | 1990-12-20 | 1990-12-20 | Pot for induction heating cooker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40414190A JP2917526B2 (en) | 1990-12-20 | 1990-12-20 | Pot for induction heating cooker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04220990A true JPH04220990A (en) | 1992-08-11 |
JP2917526B2 JP2917526B2 (en) | 1999-07-12 |
Family
ID=18513834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP40414190A Expired - Lifetime JP2917526B2 (en) | 1990-12-20 | 1990-12-20 | Pot for induction heating cooker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2917526B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006167157A (en) * | 2004-12-16 | 2006-06-29 | Matsushita Electric Ind Co Ltd | Pot for ih cooking heater |
JP2013093329A (en) * | 2012-12-26 | 2013-05-16 | Toshiba Home Technology Corp | Heating cooker |
-
1990
- 1990-12-20 JP JP40414190A patent/JP2917526B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006167157A (en) * | 2004-12-16 | 2006-06-29 | Matsushita Electric Ind Co Ltd | Pot for ih cooking heater |
JP2013093329A (en) * | 2012-12-26 | 2013-05-16 | Toshiba Home Technology Corp | Heating cooker |
Also Published As
Publication number | Publication date |
---|---|
JP2917526B2 (en) | 1999-07-12 |
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