[go: up one dir, main page]

JP2004022251A - Induction heating cooker - Google Patents

Induction heating cooker Download PDF

Info

Publication number
JP2004022251A
JP2004022251A JP2002173485A JP2002173485A JP2004022251A JP 2004022251 A JP2004022251 A JP 2004022251A JP 2002173485 A JP2002173485 A JP 2002173485A JP 2002173485 A JP2002173485 A JP 2002173485A JP 2004022251 A JP2004022251 A JP 2004022251A
Authority
JP
Japan
Prior art keywords
temperature
heating coil
pan
pot
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.)
Pending
Application number
JP2002173485A
Other languages
Japanese (ja)
Inventor
Yoshio Kaneko
金子 精夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Global Life Solutions Inc
Original Assignee
Hitachi Hometec Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Hometec Ltd filed Critical Hitachi Hometec Ltd
Priority to JP2002173485A priority Critical patent/JP2004022251A/en
Publication of JP2004022251A publication Critical patent/JP2004022251A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Induction Heating Cooking Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic induction cooker wherein a control to prevent the bottom of a pan from being deformed to a rugged shape by partially heating the pan is assembled. <P>SOLUTION: The temperatures of a plurality of high temperature parts in a body to be heated 3 are detected by a temperature detector B5, and the temperatures of low temperature parts are detected by a detector A4. The output of a heating coil 1 is brought down when the maximum temperature difference between the temperatures of the high temperature parts and the temperatures of the low temperature parts becomes not less than a prescribed temperature, and the output of the heating coil 1 is raised when the temperature difference becomes less than the prescribed temperature. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、一般家庭の厨房及び業務用厨房において、加熱調理器具として使用される電磁誘導加熱調理器の改良に関するものである。
【0002】
【従来の技術】
電磁誘導加熱を熱源にした一般家庭用の炊飯器やクッキングヒータ及び電磁調理器と呼ばれる加熱調理器具は近年飛躍的な勢いで普及している。また、業務用の世界においても電磁誘導加熱調理器は急激に普及しつつある。
【0003】
これらの電磁誘導加熱調理器においては、電磁誘導加熱をする場合の被加熱体(以下鍋と称す)の材質を磁石に着く鋳鉄、鉄、SUS430系のステンレスで成形していた。
【0004】
また近年は、従来使用できなかった磁石に着かないSUS304系のステンレス鍋も使用できるものが開発されており、使用できる鍋の材質制限が緩和されている。
【0005】
上記した電磁誘導加熱調理器は、図2に示すように耐熱ガラス等の絶縁体よりなるトッププレート2の下面にリング状の加熱コイル1が設置され、加熱コイル1の中央部にトッププレート2の下面に密着するように温度検知器4が備えられている。
【0006】
そして、トッププレート2の上面に鍋3を載置して加熱を行なうと、鍋3の底の温度分布は中心が低温部3a、中間が高温部3b、外周が低温部3cと分かれる関係となり、中間の高温部3bが局部加熱となってしまう。
【0007】
ガス火による加熱では、ガスの炎が鍋底および側面まで包み込むようになって加熱されるため鍋底は略均一に加熱される。
【0008】
しかし、電磁誘導加熱調理器では上記したように、中間の高温部3bが局部加熱となるため、これを解消するために鍋3の底面の板厚を厚くして熱伝導を向上させ、鍋底温度の均一化を図る必要があった。
【0009】
上記したステンレスの場合は、熱伝導率が鉄の1/3、アルミの1/7と非常に熱の伝わり難い材質である。これを解消する方法としてステンレスの内側にアルミを貼った鍋(炊飯器の内釜として使用されている。)や、ステンレスの間に熱伝導の良いアルミを挟んだ、ステンレス、アルミ、ステンレスと三層にしたもの、あるいは、ステンレスの間にアルミや鉄を挟んで5層や7層にした材料で作られた鍋も販売されている。
【0010】
これらの材料は、ステンレスの間に熱伝導の良い材料を挟んでいるため電磁加熱調理器のような局部加熱であってもその熱を周囲に分散できるものである。しかし、材料が何層にも重なるため板厚が厚くなり、鍋3の重量が重くなると共に価格が高価となる問題があり、従来からアルミ製で肉厚も薄く軽い鍋を使用していたユーザーには受け入れ難い問題がある。
【0011】
一方、鉄製の鍋3は、錆が発生し易いため一般家庭ではフライパン、天ぷら鍋、中華なべ以外にはあまり使われていない。
【0012】
鋳鉄製なべは肉厚が厚く重量が重いため、業務用として使われる程度で一般家庭用としてはあまり使用されていない。
【0013】
一般家庭用として受け入れられるには錆の発生が無く重量の軽いことが要求される。
【0014】
近年、熱伝導の悪いステンレス材を用いた鍋3においても板厚を薄くして重量を軽くし、低価格にしたものが販売されている。
【0015】
このものは、鍋3の中に水を入れて湯沸しを行なう場合は、鍋3から水への熱伝達が速やかに行なわれるため、ステンレス製であっても高温部と低温部の温度差が大きくならず、鍋底が変形をすることは少ない。しかし炒め物調理を行なう場合には、一旦空焼きを行ない、鍋3を高温にしてから調理を行なうため鍋3の底の温度分布は中心か低温部3a、中間が高温部3b、外周が低温部3cと分かれ、中間の高温部3bgが局部加熱となってしまう。
【0016】
そして、中間の高温部3bから中心の低温部3a及び外周の低温部3cへの熱伝導が少ないため中間の高温部3bのみ更に温度上昇して材料が熱膨張によって鍋3の内側あるいは外側に伸び、鍋底が凹凸状に変形する。
【0017】
このように、ステンレスの板厚を薄くすることによってアルミ製の鍋3と同様に軽くて低価格にすることができるが、熱伝導が悪く、しかも板厚が薄いため、局部加熱されるとその熱の分散が悪く、高温部が熱膨張するため変形し、鍋底が凹凸になる問題があった。
【0018】
近年の電磁誘導加熱調理器は、出力が大きくなっており、加熱スタート時は最大出力からスタートするため、鍋3を空焼きして高温にしようとした時に局部加熱で鍋底の変形を生じやすい。
【0019】
そこで、加熱の出力を小さくしてスタートし、時間をかけて加熱を行なうと鍋底の局部加熱は防止できるが、空焼き加熱を行なう時は火力を調整するという操作は実使用上煩わしく、行なわれないのが現状であり、使われる状態によって電磁誘導加熱調理器側で出力調整すると使い勝手が良くなるものである。
【0020】
一方、上記した鍋3の局部加熱による変形を防止するものとして特開平6−267646号公報に示すものが知られている。
【0021】
このものは、サーミスタからなる感温材料を加熱コイルのほぼ平均半径周上に沿って配置し、この感温材料と制御装置とを電気的に接続して加熱コイルの出力を制御する方法と、感温材料を二個用いて第一の感温材料を加熱コイルのほぼ平均半径周上に沿って配置し、第二の感温材料を加熱コイルの略中心部に配置し、これらの二つの感温材料と制御装置とを電気的に接続して加熱コイルの出力を制御する方法である。
【0022】
【発明が解決しようとする課題】
前者に示すように、ステンレス材よりなる薄肉の鍋を用いて電磁誘導加熱するものでは、上記したように局部加熱によって鍋底が凹凸状に変形する欠点がある。
【0023】
また、後者に示すように感温材料を用いて加熱コイルの出力を制御するものは、鍋が空焼きとなって鍋の温度が上がったときに制御をかけて鍋が異常過熱されることを防止するものであるため、熱伝導の悪い材料の鍋(例えばSUS材やチタン材)では局部過熱によって鍋底が変形する恐れがある。
【0024】
本発明はこれらの欠点を解決するものであり、鍋の局部過熱を抑制して鍋底の変形を防止する電磁誘導加熱調理器を提供するものである。
【0025】
【課題を解決するための手段】
本発明は、絶縁体よりなるトッププレートの下面にリング状の加熱コイルを設置し、上面に被加熱体を載置する電磁誘導加熱調理器において、前記被加熱体の複数箇所の高温部の温度を温度検知器Bによって検知し、低温部の温度を温度検知器Aによって検知し、高温部と低温部の温度差の最大温度差が所定温度以上となった時に加熱コイルの出力をダウンさせ、温度差が所定温度以内となった時、加熱コイルの出力をアップさせるものである。
【0026】
これによって、被加熱体の局部過熱を抑制し、被加熱体の損傷を防止することができる。
【0027】
【発明の実施の形態】
以下、本発明の一実施例を図1及び従来例で説明した図2を一部用いて説明する。
【0028】
図において、1は略リング状の加熱コイルである。2は加熱コイル1の上面に配置した耐熱ガラス等の絶縁体よりなるトッププレートである。
【0029】
3はトッププレート2の上面に載置された被加熱体(以下鍋という)である。4は加熱コイル1の中央部に備えられた温度検知器Aであり、トッププレート2の下面に密着して鍋底中心の低温部3aの温度を検出する。
【0030】
5は加熱コイル1の内周と外周の略中間点に配置された温度検知器Bであり、鍋底中間の高温部3bの温度を検出する。この温度検知器B5は、鍋3がどの方向にずれても検出可能なように加熱コイル1の内周と外周の中間部の複数箇所に設けている。6は温度検知器A4及び温度検知器B5からの情報に基づいて加熱コイル1を制御する制御回路部、7は操作部である。
【0031】
8は加熱コイル1及び制御回路部6を冷却する冷却ファンである。
【0032】
9は上記した加熱コイル1、温度検知器A4、B5、制御回路部6及び冷却ファン8等を収納した本体ボディーである。10は本体ボディー9の底面に設けられた吸気口で、冷却空気の取り入れ口である。11は本体ボディー9の後部に設けられた排気口で、加熱コイル1、制御回路部6を冷却した後の廃熱を排出する。
【0033】
次に上記構成からなる本実施例の作用について説明する。
【0034】
鍋3の中に水を入れて加熱を行なう場合は、電磁誘導加熱調理器の操作部7の電源SW(図示せず)をONすることにより加熱コイル1に高周波電流が流れ、磁力線が発生して鍋3が発熱し、加熱が行なわれる。このとき冷却ファン8も運転され、加熱コイル1および制御回路部6は冷却される。
【0035】
加熱によって鍋底が局部加熱となっても、鍋底の高温部から水への熱伝達が潤沢に行なわれるため鍋3の高温部のみが異常に高温となることはない。
【0036】
炒め物調理を行なう場合は、最初に鍋3を空焼きして高温に熱する。
【0037】
この場合に、熱伝導の悪い鍋3で空焼きを行なうと、図2に示すように加熱コイル1の内周と外周の中間部分がリング状に高温となる。
【0038】
この高温部3bの温度は、複数箇所に備えた温度検知器B5が検出し、それらの信号は制御回路部6に送られる。また加熱コイル1の中央にある温度検知器A4で検知された低温部3aの信号も制御回路部6に送られる。
【0039】
制御回路部6内では、高温部3bと低温部3aの温度差が最大となった温度が、予め定められて制御回路部6内にインプットされている所定の温度、例えば50℃を超えた時に加熱コイル1の出力を例えば1/2にする。出力が1/2になったことにより加熱速度が緩和されて高温部3bと低温部3aの温度差が少なくなり、所定の温度以下となった時、元の出力にアップする制御を自動的に行なう。
【0040】
これによって、鍋底の高温部3bと低温部3aの温度差を所定以上に大きくならないように自動的に制御するため、調理時に操作の煩わしさをすることなく鍋底の変形を防止することができるものである。
【0041】
また、このとき鍋底中間の高温部3bの温度を検出する温度検知器B5を、鍋3がどの方向にずれても検出可能なように加熱コイル1の内周と外周の中間部の複数箇所に設けているため、正確に高温部3bの温度を検知して制御回路部6に送ることが出来る。
【0042】
また、これによって板厚の薄いステンレス材で作られた熱伝導の悪い鍋であっても鍋底の変形を防止することができる。
【0043】
さらに、制御回路部6は、主に空焼きによって鍋3を高温に加熱する時に作動するものであり、湯沸しのように熱が鍋3に蓄積されない加熱では作動しないものであり、従って調理時間に影響を及ぼすことはない。
【0044】
なお、制御回路部6内にインプットされている高温部3bと低温部3aの温度差及びその温度差を超えた時に下げる加熱コイル1の出力は加熱コイル1の最大出力等を勘案して適宜設定すればよい。
【0045】
【発明の効果】
以上説明したように、本発明は、被加熱体の複数箇所の高温部の温度を温度検知器Bによって検知し、低温部の温度を温度検知器Aによって検知し、高温部と低温部の温度差の最大温度差が所定温度以上となった時に加熱コイルの出力をダウンさせ、温度差が所定温度以内となった時、加熱コイルの出力をアップさせるようにしたので、加熱コイルで被加熱体を加熱した場合に局部加熱によって鍋底が凹凸状に変形するのを自動的に防止することができるものである。
【0046】
また、本発明は、鍋底の低温部と高温部の複数箇所の温度を検知して高温部と低温部の温度差が所定の温度を超えないように自動的に出力制御を行なうことにより調理時において操作の煩わしさをなくすことができる。
【0047】
また、本発明の制御は、主に空焼きによって鍋を高温に加熱する時に作動するものであり、湯沸しのように熱が鍋に蓄積されない加熱では作動しないものであり、従って調理時間に影響を及ぼすことはないものである。
【0048】
さらに、本発明は、板厚の薄いステンレス材で作られた熱伝導の悪い鍋であっても鍋底の変形を防止することができるものである。
【図面の簡単な説明】
【図1】本発明の電磁誘導加熱調理器の概要を示した構造説明図である。
【図2】従来の電磁誘導加熱調理器による加熱で鍋底が局部加熱となる状態を示した説明図である。
【符号の説明】
1  加熱コイル
2  トッププレート
3  被加熱体(鍋)
4  温度検知器A
5  温度検知器B
6  制御回路部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an electromagnetic induction heating cooker used as a heating cooker in a general household kitchen and a commercial kitchen.
[0002]
[Prior art]
2. Description of the Related Art In recent years, rice cookers, cooking heaters, and heating cookers called electromagnetic cookers that use electromagnetic induction heating as a heat source have become very popular in recent years. In addition, the electromagnetic induction heating cooker is rapidly spreading in the business world.
[0003]
In these electromagnetic induction heating cookers, a material to be heated (hereinafter referred to as a pan) in the case of performing electromagnetic induction heating is formed of cast iron, iron, or SUS430 stainless steel which is attached to a magnet.
[0004]
In recent years, SUS304 stainless steel pots that can not be used for magnets that cannot be used in the past have been developed, and those that can be used have been relaxed.
[0005]
In the above-described electromagnetic induction heating cooker, as shown in FIG. 2, a ring-shaped heating coil 1 is installed on the lower surface of a top plate 2 made of an insulator such as heat-resistant glass. A temperature detector 4 is provided so as to be in close contact with the lower surface.
[0006]
When the pot 3 is placed on the upper surface of the top plate 2 and heated, the temperature distribution at the bottom of the pot 3 is such that the center is divided into the low-temperature part 3a, the middle part is divided into the high-temperature part 3b, and the outer periphery is divided into the low-temperature part 3c. The intermediate high temperature portion 3b is locally heated.
[0007]
In the heating by gas fire, since the gas flame wraps around the bottom and side surfaces of the pan and is heated, the pan bottom is heated substantially uniformly.
[0008]
However, in the electromagnetic induction heating cooker, as described above, since the intermediate high-temperature portion 3b is locally heated, the thickness of the bottom surface of the pan 3 is increased by increasing the thickness of the bottom of the pan 3 so as to improve the heat conduction. It was necessary to achieve uniformity.
[0009]
In the case of the stainless steel described above, the heat conductivity is 1/3 that of iron and 1/7 that of aluminum, which is a material that is extremely difficult to conduct heat. As a method of solving this, a pot with aluminum stuck on the inside of stainless steel (used as an inner pot of a rice cooker) or a stainless steel, aluminum, stainless steel, etc. Pots are also available that are made of layers, or made of five or seven layers of material with aluminum or iron between stainless steel.
[0010]
These materials can disperse the heat to the surroundings even in the case of local heating such as an electromagnetic heating cooker because a material having good heat conductivity is sandwiched between stainless steels. However, there is a problem that the thickness of the plate 3 becomes thick because the material is overlaid on many layers, and the price of the pot 3 becomes heavy and the price becomes expensive. Has an unacceptable problem.
[0011]
On the other hand, the iron pot 3 is seldom used in ordinary households except for frying pans, fry pans, and woks because it easily generates rust.
[0012]
Cast iron pans are thick and heavy, so they are used only for business purposes and are rarely used for ordinary households.
[0013]
In order to be accepted for general household use, it is required that there be no rust and the weight is light.
[0014]
In recent years, even a pot 3 made of stainless steel having poor heat conductivity has been sold with a reduced thickness and a reduced weight, and at a low price.
[0015]
When the water is put into the pot 3 and the water is heated, the heat transfer from the pot 3 to the water is performed quickly, so that the temperature difference between the high temperature part and the low temperature part is large even in the case of stainless steel. In addition, the bottom of the pot is rarely deformed. However, when cooking a stir-fry, the baking is performed once, the pot 3 is heated to a high temperature, and then the cooking is performed. The portion 3c is separated from the portion 3c, and the intermediate high temperature portion 3bg is locally heated.
[0016]
Since the heat conduction from the middle high-temperature portion 3b to the center low-temperature portion 3a and the outer low-temperature portion 3c is small, only the middle high-temperature portion 3b further rises in temperature and the material expands inside or outside the pot 3 due to thermal expansion. , The bottom of the pot is deformed irregularly.
[0017]
As described above, by reducing the thickness of the stainless steel plate, it can be made light and inexpensive as in the case of the aluminum pot 3, but the heat conduction is poor and the plate thickness is thin, so that when it is locally heated, There was a problem that the dispersion of heat was poor and the high-temperature part was deformed due to thermal expansion and the pot bottom became uneven.
[0018]
In recent years, the output of the electromagnetic induction heating cooker is large, and the heating is started from the maximum output at the start of heating. Therefore, when the pan 3 is baked to be heated to a high temperature, the bottom of the pan is likely to be deformed by local heating.
[0019]
Therefore, if the heating output is reduced and started and heating is performed over time, local heating at the bottom of the pan can be prevented, but when performing empty baking heating, the operation of adjusting the heating power is cumbersome in actual use, and is performed. At present, there is no such function, and if the output is adjusted on the side of the electromagnetic induction heating cooker depending on the state of use, the usability is improved.
[0020]
On the other hand, a device disclosed in Japanese Patent Application Laid-Open No. 6-267646 is known to prevent the above-mentioned pan 3 from being deformed due to local heating.
[0021]
This is a method of arranging a temperature-sensitive material composed of a thermistor along substantially the average radius of the heating coil, electrically connecting the temperature-sensitive material and a control device to control the output of the heating coil, Using two temperature-sensitive materials, the first temperature-sensitive material is disposed substantially along the circumference of the average radius of the heating coil, and the second temperature-sensitive material is disposed substantially at the center of the heating coil. This is a method of controlling the output of a heating coil by electrically connecting a temperature-sensitive material and a control device.
[0022]
[Problems to be solved by the invention]
As shown in the former, the electromagnetic induction heating using a thin pot made of stainless steel has a drawback that the pot bottom is deformed unevenly due to local heating as described above.
[0023]
In the case of controlling the output of the heating coil using a temperature-sensitive material as shown in the latter, the control is performed when the temperature of the pan rises due to the baking of the pan, and the pan is abnormally overheated. In order to prevent this, the pot bottom may be deformed due to local overheating in a pot made of a material having poor heat conduction (for example, SUS material or titanium material).
[0024]
The present invention solves these drawbacks and provides an electromagnetic induction heating cooker that suppresses local overheating of the pan and prevents deformation of the pan bottom.
[0025]
[Means for Solving the Problems]
The present invention provides an electromagnetic induction heating cooker in which a ring-shaped heating coil is installed on the lower surface of a top plate made of an insulator and the object to be heated is placed on the upper surface. Is detected by the temperature detector B, the temperature of the low-temperature part is detected by the temperature detector A, and when the maximum temperature difference between the high-temperature part and the low-temperature part becomes a predetermined temperature or more, the output of the heating coil is reduced, When the temperature difference falls within a predetermined temperature, the output of the heating coil is increased.
[0026]
Thus, local overheating of the object to be heated can be suppressed, and damage to the object to be heated can be prevented.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1 and FIG.
[0028]
In the figure, reference numeral 1 denotes a substantially ring-shaped heating coil. Reference numeral 2 denotes a top plate made of an insulator such as heat-resistant glass disposed on the upper surface of the heating coil 1.
[0029]
Reference numeral 3 denotes an object to be heated (hereinafter referred to as a pan) placed on the upper surface of the top plate 2. Reference numeral 4 denotes a temperature detector A provided at the center of the heating coil 1, which is in close contact with the lower surface of the top plate 2 and detects the temperature of the low-temperature portion 3a at the center of the bottom of the pan.
[0030]
Reference numeral 5 denotes a temperature detector B arranged at a substantially intermediate point between the inner circumference and the outer circumference of the heating coil 1, and detects the temperature of the high-temperature portion 3b in the middle of the pot bottom. The temperature detector B5 is provided at a plurality of intermediate portions between the inner circumference and the outer circumference of the heating coil 1 so as to be able to detect the displacement of the pan 3 in any direction. Reference numeral 6 denotes a control circuit for controlling the heating coil 1 based on information from the temperature detectors A4 and B5, and reference numeral 7 denotes an operation unit.
[0031]
A cooling fan 8 cools the heating coil 1 and the control circuit unit 6.
[0032]
Reference numeral 9 denotes a main body housing the heating coil 1, the temperature detectors A4 and B5, the control circuit 6, the cooling fan 8, and the like. Reference numeral 10 denotes an intake port provided on the bottom surface of the main body 9, which is a cooling air intake port. Reference numeral 11 denotes an exhaust port provided at a rear portion of the main body 9 to discharge waste heat after cooling the heating coil 1 and the control circuit section 6.
[0033]
Next, the operation of the present embodiment having the above configuration will be described.
[0034]
When water is placed in the pot 3 and heating is performed, a high-frequency current flows through the heating coil 1 by turning on a power supply SW (not shown) of the operation unit 7 of the electromagnetic induction heating cooker, and magnetic lines of force are generated. The pan 3 generates heat and is heated. At this time, the cooling fan 8 is also operated, and the heating coil 1 and the control circuit unit 6 are cooled.
[0035]
Even if the bottom of the pot is locally heated by the heating, the heat transfer from the high temperature section of the pot bottom to the water is performed abundantly, so that only the high temperature section of the pan 3 does not become abnormally high.
[0036]
When cooking a stir-fry, the pan 3 is first baked and heated to a high temperature.
[0037]
In this case, if the baking is performed in the pot 3 having poor heat conduction, the middle portion between the inner circumference and the outer circumference of the heating coil 1 becomes a ring-shaped high temperature as shown in FIG.
[0038]
The temperature of the high-temperature section 3b is detected by temperature detectors B5 provided at a plurality of locations, and their signals are sent to the control circuit section 6. The signal of the low temperature section 3a detected by the temperature detector A4 at the center of the heating coil 1 is also sent to the control circuit section 6.
[0039]
In the control circuit section 6, when the temperature at which the temperature difference between the high-temperature section 3b and the low-temperature section 3a becomes the maximum exceeds a predetermined temperature input in the control circuit section 6 in advance, for example, 50 ° C. The output of the heating coil 1 is reduced to, for example, 1 /. When the output is reduced to half, the heating rate is reduced, and the temperature difference between the high-temperature section 3b and the low-temperature section 3a is reduced. Do.
[0040]
This automatically controls the temperature difference between the high temperature portion 3b and the low temperature portion 3a of the pan bottom so as not to become larger than a predetermined value, thereby preventing the pan bottom from being deformed without troublesome operation during cooking. It is.
[0041]
At this time, a temperature detector B5 for detecting the temperature of the hot portion 3b at the middle of the bottom of the pot is provided at a plurality of locations on the middle portion between the inner periphery and the outer periphery of the heating coil 1 so that the temperature detector B5 can detect the displacement of the pot 3 in any direction. Since it is provided, the temperature of the high-temperature section 3b can be accurately detected and sent to the control circuit section 6.
[0042]
In addition, this makes it possible to prevent the bottom of the pot from being deformed even with a poor heat conduction pot made of a thin stainless steel plate.
[0043]
Further, the control circuit 6 operates when the pan 3 is heated to a high temperature mainly by baking, and does not operate when the heat is not accumulated in the pan 3 such as a water heater, and therefore, the control circuit 6 is not used for cooking time. Has no effect.
[0044]
Note that the temperature difference between the high temperature section 3b and the low temperature section 3a input into the control circuit section 6 and the output of the heating coil 1 to be reduced when the temperature difference is exceeded are appropriately set in consideration of the maximum output of the heating coil 1 and the like. do it.
[0045]
【The invention's effect】
As described above, according to the present invention, the temperature of the high-temperature portion at a plurality of locations of the object to be heated is detected by the temperature detector B, the temperature of the low-temperature portion is detected by the temperature detector A, and the temperatures of the high-temperature portion and the low-temperature portion are detected. The output of the heating coil is reduced when the maximum temperature difference exceeds a predetermined temperature, and the output of the heating coil is increased when the temperature difference falls within the predetermined temperature. Can be automatically prevented from deforming the pan bottom unevenly due to local heating when is heated.
[0046]
In addition, the present invention detects the temperature of a plurality of low-temperature portions and high-temperature portions at the bottom of the pot, and automatically performs output control so that the temperature difference between the high-temperature portions and the low-temperature portions does not exceed a predetermined temperature. Can eliminate the troublesome operation.
[0047]
In addition, the control of the present invention mainly operates when the pan is heated to a high temperature by baking, and does not operate when the heat is not accumulated in the pan, such as a water heater, so that the cooking time is not affected. It has no effect.
[0048]
Further, the present invention can prevent the bottom of the pan from being deformed even with a poor heat conduction pot made of a thin stainless steel plate.
[Brief description of the drawings]
FIG. 1 is a structural explanatory view showing an outline of an electromagnetic induction heating cooker of the present invention.
FIG. 2 is an explanatory diagram showing a state in which a pan bottom is locally heated by heating by a conventional electromagnetic induction heating cooker.
[Explanation of symbols]
1 heating coil 2 top plate 3 body to be heated (pan)
4 Temperature detector A
5 Temperature detector B
6 Control circuit section

Claims (1)

絶縁体よりなるトッププレート(2)の下面にリング状の加熱コイル(1)を設置し、上面に被加熱体(3)を載置する電磁誘導加熱調理器において、前記被加熱体(3)の複数箇所の高温部の温度を温度検知器B(5)によって検知し、低温部の温度を温度検知器A(4)によって検知し、高温部と低温部の温度差の最大温度差が所定温度以上となった時に加熱コイル(1)の出力をダウンさせ、温度差が所定温度以内となった時、加熱コイル(1)の出力をアップさせることを特徴とする電磁誘導加熱調理器。In an electromagnetic induction heating cooker in which a ring-shaped heating coil (1) is installed on a lower surface of a top plate (2) made of an insulator and a heated object (3) is placed on an upper surface, the heated object (3) The temperature of a plurality of high-temperature portions is detected by a temperature detector B (5), the temperature of a low-temperature portion is detected by a temperature detector A (4), and the maximum temperature difference between the high-temperature portion and the low-temperature portion is determined. An electromagnetic induction heating cooker characterized by lowering the output of the heating coil (1) when the temperature exceeds the temperature, and increasing the output of the heating coil (1) when the temperature difference falls within a predetermined temperature.
JP2002173485A 2002-06-14 2002-06-14 Induction heating cooker Pending JP2004022251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002173485A JP2004022251A (en) 2002-06-14 2002-06-14 Induction heating cooker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002173485A JP2004022251A (en) 2002-06-14 2002-06-14 Induction heating cooker

Publications (1)

Publication Number Publication Date
JP2004022251A true JP2004022251A (en) 2004-01-22

Family

ID=31172689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002173485A Pending JP2004022251A (en) 2002-06-14 2002-06-14 Induction heating cooker

Country Status (1)

Country Link
JP (1) JP2004022251A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008004354A (en) * 2006-06-22 2008-01-10 Matsushita Electric Ind Co Ltd Induction heating cooker
JP2008052960A (en) * 2006-08-23 2008-03-06 Matsushita Electric Ind Co Ltd Induction heating cooker
JP2009026571A (en) * 2007-07-19 2009-02-05 Hitachi Appliances Inc Induction heating cooker
JP2011151034A (en) * 2011-03-28 2011-08-04 Sanyo Electric Co Ltd Cooking device
JP2013054951A (en) * 2011-09-05 2013-03-21 Mitsubishi Electric Corp Induction heating cooker
USRE44525E1 (en) 2006-01-26 2013-10-08 D2Audio Corporation Systems and methods for over-current protection

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE44525E1 (en) 2006-01-26 2013-10-08 D2Audio Corporation Systems and methods for over-current protection
JP2008004354A (en) * 2006-06-22 2008-01-10 Matsushita Electric Ind Co Ltd Induction heating cooker
JP2008052960A (en) * 2006-08-23 2008-03-06 Matsushita Electric Ind Co Ltd Induction heating cooker
JP2009026571A (en) * 2007-07-19 2009-02-05 Hitachi Appliances Inc Induction heating cooker
JP2011151034A (en) * 2011-03-28 2011-08-04 Sanyo Electric Co Ltd Cooking device
JP2013054951A (en) * 2011-09-05 2013-03-21 Mitsubishi Electric Corp Induction heating cooker

Similar Documents

Publication Publication Date Title
JP5033733B2 (en) Induction heating cooker
JP4096813B2 (en) Induction heating cooker
JP4982282B2 (en) Induction heating cooker
JP5022784B2 (en) Induction heating cooker
JP2004022251A (en) Induction heating cooker
JP3928602B2 (en) Induction heating cooker
JP2009295457A (en) Induction heating cooker
JP5846935B2 (en) Power control system for induction heating cooker and home appliance
JP2004319350A (en) Cooking device
JP5241575B2 (en) Induction heating cooker
JP4969350B2 (en) Induction heating cooker
JP4102258B2 (en) Induction heating cooker
JP2005353458A (en) Induction heating cooking device
JP5930663B2 (en) Induction heating cooker
JP5029774B1 (en) Induction heating cooker
JP2011228030A (en) Induction heating cooker
JP3933088B2 (en) Induction heating cooker
JP5579101B2 (en) Induction heating cooker
JP5892862B2 (en) Cooker
JP5445628B2 (en) Induction heating cooker
JP2012049048A (en) Induction heating cooker
JP2014056846A (en) Induction heating cooker
JP4810888B2 (en) Induction heating cooker
JP2006031947A (en) Electromagnetic induction heating cooker
JP5378573B2 (en) Induction heating cooker