JPH0569531B2 - - Google Patents

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Publication number
JPH0569531B2
JPH0569531B2 JP60076935A JP7693585A JPH0569531B2 JP H0569531 B2 JPH0569531 B2 JP H0569531B2 JP 60076935 A JP60076935 A JP 60076935A JP 7693585 A JP7693585 A JP 7693585A JP H0569531 B2 JPH0569531 B2 JP H0569531B2
Authority
JP
Japan
Prior art keywords
far
rice
inner pot
fluororesin
oxide
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
Application number
JP60076935A
Other languages
Japanese (ja)
Other versions
JPS61234820A (en
Inventor
Hidesato Kawanishi
Noboru Naruo
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7693585A priority Critical patent/JPS61234820A/en
Publication of JPS61234820A publication Critical patent/JPS61234820A/en
Publication of JPH0569531B2 publication Critical patent/JPH0569531B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】[Detailed description of the invention]

産業上の利用分野 本発明は、一般家庭などで日常的に使用する炊
飯器用鍋に関するものである。 従来の技術 従来より炊飯器においては、炊飯用ヒータの熱
をいかに効率よく内鍋内部の水または米に伝え、
熱効率を高めるかが問題とされてきた。 この問題を解決するため、種々の方式の炊飯器
が提案されているが、いずれも構成が複雑であつ
た。 一方、最近では、鍋やフライパン、さらにホツ
トプレートなどに遠赤外線放射による加熱を利用
した調理器具が提案されている。 たとえば、実開昭59−16526号公報に示されて
いるように、金属製調理具本体の内側表面を遠赤
外線放射性のセラミツク粒子層で被覆し、前記セ
ラミツク粒子層を合成樹脂層で被覆したものや、
実開昭59−71718号公報に示されているように、
粗面化したアルミニウム金属製器物の内表面にア
ルマイト層とZrO2,SiO2およびTrO2の1つない
しは3つの遠赤外線放射性物質を含有するフツ素
樹脂プライマー層と、同様の遠赤外線放射性物質
を含有するフツ素樹脂層とを順次積層化したもの
などいろいろと提案されている。 しかし、これらは上述したように、すべて鍋
や、フライパン、ホツトプレートなどの製品に応
用されたものであり、特に炊飯器に対して、遠赤
外線放射による加熱を応用した例は、いばだ見ら
れなかつた。 また、実公昭56−11847号公報に示されている
ように、内鍋に外面および内鍋の外面に対向する
器具本体の内壁に黒色処理を施すことにより、炊
飯用ヒータおよび保温ヒータの熱を従来の伝導お
よび対流以外に放射を利用して効率よく内鍋に伝
える方法もあるが、内鍋の熱を効率よく水および
米に伝える方法や、内鍋の内面に処理を施して熱
効率を高める方法などはいまだ見られなかつた。 発明が解決しようとする問題点 前述したように、遠赤外線放射による加熱方式
を炊飯器に応用した例はなく、本発明は、炊飯器
において、炊飯用ヒータの熱を効率よく内鍋内の
水または米に伝える手段として、遠赤外線放射に
よる加熱方式を利用しようとするものである。 しかし、他の調理器具で既に提案されている遠
赤外線放射物質のセラミツク粒子層を合成樹脂層
で被覆する方法では、セラミツク粒子層により放
射された遠赤外線が合成樹脂層により相殺または
変化するため、好ましくない。 一方、フツ素樹脂層にZrO2,SiO2またはTiO2
からなる遠赤外線放射物質を含有させる方法で
は、10ミクロンより長波長領域の遠赤外線をよく
放射するが、炊飯器において、もつとも効率よく
加熱する必要のある水の赤外線吸収特性(3ミク
ロン、7ミクロンおよび15ミクロン)にマツチン
グしておらず、あまり理想的な遠赤外線放射物質
とは言えない。 本発明は、従来より鍋やフライパン等の調理器
具に応用されている遠赤外線放射による加熱方式
の欠点を改善し、炊飯用ヒータの熱を効率よく内
鍋の水または米に伝えることにより熱効率の優れ
た炊飯器用鍋を提供することを目的とする。 問題点を解決するための手段 上記問題点を解決するために本発明は、遠赤外
線放射物質として、酸化ニツケルを主成分とし、
酸化鉄、酸化コバルトおよび酸化マンガンの少な
くとも1種以上を不純物とする混合物を用いると
ともに、内鍋の内面を前記遠赤外線放射物質を含
有するフツ素樹脂で被覆処理したものである。 作 用 一般に物を加熱する場合、加熱物の放射特性と
被加熱物の赤外線吸収特性とが、いかに合つてい
るかにより、熱効率は大きく左右される。特に、
炊飯器では、水を効率よく加熱することが重要で
あり、水の赤外線吸収特性によく合つた遠赤外線
放射特性を有する物質を用いて加熱するのが理想
とされる。 しかし、すでに提案されているZrO2,SiO2
およびTiO2では、10ミクロン以上の長波長領域
での遠赤外線放射特性は優れているが、10ミクロ
ン以下の水の赤外線吸収特性に対応する3ミクロ
ンおよび7ミクロンの放射特性においては劣つて
いる。 一方、本発明において使用する酸化ニツケル
は、高効率放射物質とも言われるように、3ミク
ロンおよび7ミクロンの放射特性のみならず、10
ミクロン以上の長波長領域においても優れた放射
特性を示すため、従来より提案されているZrO2
SiO2およびTiO2よりも酸化ニツケルの方が炊飯
器用鍋への応用展開においては優れていると考え
られる。ところで、酸化ニツケルの高純度のもの
は、グリーン色であり、従来のZrO2およびSiO2
と同様に、調理による汚れが目立ち、あまり好し
いものではない。このため、本発明は、酸化ニツ
ケルに故意に、不純物として、酸化鉄、酸化コバ
ルトおよび酸化マンガンの少なくとも1種以上の
物質を添加し、黒色系にすることにより、汚れに
対して目立たないように配慮したものである。 また、不純物として用いる酸化鉄、酸化コバル
トおよび酸化マンガンは、主成分である酸化ニツ
ケルと同様に、高効率放射物質と言われるものに
属し、非常に高い放射特性を有し、これら物質を
酸化ニツケルに添加しても、酸化ニツケルの放射
特性を著しく低下させることはない。 さらに、これら遠赤外線放射物質をフツ素樹脂
中に含有させることにより、内鍋の耐食性が低下
するのを抑制することができるとともに、ご飯の
こびりつきも防止することができる。 このような理由により、従来のフツ素樹脂を被
覆処理した内鍋の特性を損わないで、内鍋の水を
効率よく加熱することができるため、熱効率の優
れた炊飯器用鍋を得ることが可能となる。 実施例 以下、本発明の一実施例を添付図面に基づいて
説明する。第1図は本発明の一実施例の炊飯器を
示したもので、この第1図において、1は少なく
とも内壁2を熱伝導が良好な金属製とした器具本
体で、この器具本体1の内壁2と外壁3との間に
は断熱材4を介在させている。5は器具本体内壁
2の裏面上部に環状に配設した保温ヒータ、6は
器具本体1の内壁2の内底面に装備した炊飯用ヒ
ータ、7は熱伝導が良好な金属で構成された有底
筒状の内鍋で、この内鍋7は炊飯用ヒータ6上に
密接載置され、かつ器具本体1の内壁2とは若干
の間隙を有した状態で器具本体1内に収納される
ように構成している。8は器具本体1の上方開口
部を覆う断熱蓋、9は内鍋7の上方開口部を覆う
金属製内蓋で、前記断熱蓋8に着脱自在に連結さ
れている。 また第2図に示すように、内鍋7の内面は、第
1表に示す組成の酸化ニツケルを主成分とする混
合物からなる遠赤外線放射物質7aを20重量%含
有するフツ素樹脂7bで被覆処理されている。
INDUSTRIAL APPLICATION FIELD The present invention relates to a rice cooker pot used on a daily basis in general households. Conventional technology Traditionally, rice cookers have been concerned with how efficiently the heat from the rice-cooking heater is transferred to the water or rice inside the inner pot.
The issue has been how to improve thermal efficiency. In order to solve this problem, various types of rice cookers have been proposed, but all of them have complicated structures. On the other hand, recently, cooking utensils such as pots, frying pans, and even hot plates that utilize far-infrared radiation for heating have been proposed. For example, as shown in Japanese Utility Model Application Publication No. 59-16526, the inner surface of a metal cooking utensil body is coated with a far-infrared emitting ceramic particle layer, and the ceramic particle layer is coated with a synthetic resin layer. or,
As shown in Utility Model Application Publication No. 59-71718,
An alumite layer and a fluororesin primer layer containing one or three far-infrared emissive substances of ZrO 2 , SiO 2 and TrO 2 and similar far-infrared emissive substances on the inner surface of the roughened aluminum metal utensil. Various proposals have been made, including one in which fluororesin layers containing . However, as mentioned above, these are all applied to products such as pots, frying pans, and hot plates, and in particular, there are no examples of applying far-infrared radiation heating to rice cookers. I couldn't help it. Furthermore, as shown in Japanese Utility Model Publication No. 56-11847, by applying black treatment to the outer surface of the inner pot and the inner wall of the appliance body facing the outer surface of the inner pot, heat from the rice-cooking heater and the heat-retaining heater can be reduced. In addition to the conventional conduction and convection methods, there is also a method of efficiently transmitting heat to the inner pot using radiation, but there are methods to efficiently transmit heat from the inner pot to water and rice, and treatments on the inner surface of the inner pot to increase thermal efficiency. The method has not yet been discovered. Problems to be Solved by the Invention As mentioned above, there is no example of applying a heating method using far-infrared radiation to a rice cooker. Alternatively, the idea is to use a heating method using far-infrared radiation as a means of transmitting the information to rice. However, in the method of coating the ceramic particle layer of far-infrared emitting material with a synthetic resin layer, which has already been proposed for other cooking utensils, the far-infrared rays emitted by the ceramic particle layer are canceled out or changed by the synthetic resin layer. Undesirable. On the other hand, ZrO 2 , SiO 2 or TiO 2 is added to the fluororesin layer.
In the method of containing a far-infrared emitting substance consisting of and 15 microns), so it cannot be said to be an ideal far-infrared emitting material. The present invention improves the drawbacks of the far-infrared radiation heating method conventionally applied to cooking utensils such as pots and frying pans, and improves thermal efficiency by efficiently transmitting the heat of the rice cooking heater to the water or rice in the inner pot. The purpose is to provide an excellent rice cooker pot. Means for Solving the Problems In order to solve the above problems, the present invention uses nickel oxide as a main component as a far-infrared emitting material,
A mixture containing at least one of iron oxide, cobalt oxide, and manganese oxide as an impurity is used, and the inner surface of the inner pot is coated with a fluororesin containing the far-infrared emitting substance. Effects Generally, when heating an object, thermal efficiency is greatly influenced by how well the radiation characteristics of the object to be heated match the infrared absorption characteristics of the object to be heated. especially,
In a rice cooker, it is important to heat water efficiently, and it is ideal to heat the water using a substance that has far-infrared radiation characteristics that closely match the infrared absorption characteristics of water. However, the already proposed ZrO 2 , SiO 2 ,
And TiO 2 has excellent far-infrared radiation properties in the long wavelength region of 10 microns or more, but is inferior in radiation properties at 3 microns and 7 microns, which correspond to the infrared absorption properties of water below 10 microns. On the other hand, the nickel oxide used in the present invention has not only radiation characteristics of 3 microns and 7 microns, but also has radiation characteristics of 10
ZrO 2 ,
Nickel oxide is considered to be superior to SiO 2 and TiO 2 in terms of application to rice cooker pots. By the way, high purity nickel oxide is green in color and is different from conventional ZrO 2 and SiO 2
Similarly, stains from cooking are noticeable, which is not very desirable. For this reason, the present invention intentionally adds at least one substance of iron oxide, cobalt oxide, and manganese oxide as impurities to nickel oxide to make it blackish, thereby making it less noticeable to stains. This was taken into consideration. In addition, iron oxide, cobalt oxide, and manganese oxide used as impurities belong to what is called a high-efficiency radioactive substance, like nickel oxide, which is the main component, and have extremely high radioactive properties. Even when added to nickel oxide, the radiation characteristics of nickel oxide will not be significantly degraded. Furthermore, by incorporating these far-infrared emitting substances into the fluororesin, it is possible to suppress a decrease in the corrosion resistance of the inner pot, and it is also possible to prevent rice from sticking. For this reason, water in the inner pot can be efficiently heated without impairing the characteristics of the conventional inner pot coated with fluororesin, making it possible to obtain a rice cooker pot with excellent thermal efficiency. It becomes possible. Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 shows a rice cooker according to an embodiment of the present invention. In FIG. A heat insulating material 4 is interposed between the outer wall 2 and the outer wall 3. Reference numeral 5 denotes a heat-retaining heater arranged in an annular manner on the upper back surface of the inner wall 2 of the appliance body, 6 a rice-cooking heater equipped on the inner bottom surface of the inner wall 2 of the appliance body 1, and 7 a bottomed heater made of metal with good heat conduction. It is a cylindrical inner pot, and the inner pot 7 is placed closely on the rice-cooking heater 6 and is housed in the appliance body 1 with a slight gap from the inner wall 2 of the appliance body 1. It consists of 8 is a heat insulating lid that covers the upper opening of the main body 1, and 9 is a metal inner lid that covers the upper opening of the inner pot 7, which is detachably connected to the heat insulating lid 8. Further, as shown in FIG. 2, the inner surface of the inner pot 7 is coated with a fluororesin 7b containing 20% by weight of a far-infrared emitting substance 7a made of a mixture whose main component is nickel oxide with the composition shown in Table 1. being processed.

【表】 このような本発明の一実施例における炊飯器と
比較するために、従来例として、内鍋7の内面を
遠赤外線放射物質7aをまつたく含有しないフツ
素樹脂7bで被覆処理した炊飯器、比較例1およ
び2として、内鍋7の内面をZrO2またはSiO2
遠赤外線放射物質7aを20重量%含有するフツ素
樹脂7bで被覆処理した炊飯器をそれぞれ準備し
た。 それぞれの炊飯器を評価するために、一定消費
電力を負荷し、そして炊飯が完了するまでの時間
を求め、この炊飯時間より熱効率を算出し、この
結果を第2表に示した。 なお、熱効率は、遠赤外線放射物質7aをまつ
たく含有しないフツ素樹脂7bで被覆処理した内
鍋を使用した従来例の炊飯器の場合を100%とし
た。
[Table] In order to compare with the rice cooker according to the embodiment of the present invention, as a conventional example, a rice cooker was prepared in which the inner surface of the inner pot 7 was coated with a fluororesin 7b that did not contain much of the far-infrared emitting substance 7a. As Comparative Examples 1 and 2, rice cookers were prepared in which the inner surface of the inner pot 7 was coated with a fluororesin 7b containing 20% by weight of a far-infrared emitting substance 7a of ZrO 2 or SiO 2 . In order to evaluate each rice cooker, a constant power consumption was applied to the rice cooker, and the time taken to complete rice cooking was determined. Thermal efficiency was calculated from this rice cooking time, and the results are shown in Table 2. The thermal efficiency was 100% in the case of a conventional rice cooker using an inner pot coated with a fluororesin 7b that did not contain the far-infrared emitting substance 7a.

【表】 第2表から明らかなように、フツ素樹脂7bの
みを使用した従来例に対して、ZrO2またはSiO2
を20重量%含有するフツ素樹脂7bで処理した比
較例1および2では、それぞれ7%または5%熱
効率が高まるだけであつたが、酸化ニツケルを主
成分とする混合物を含有するフツ素樹脂7bで処
理した本発明の炊飯器では、従来例に対して15%
熱効率が高まり、著しい効果が得られた。 このように、遠赤外線放射物質7aとして、酸
化ニツケルを主成分とする混合物を20重量%含有
するフツ素樹脂7bで内鍋7の内面を被覆処理す
ることにより、熱効率を著しく高めることができ
た。 また、炊飯時のご飯のこびりつきも特に見られ
ず従来のフツ素樹脂により被覆処理した内鍋7と
同様の特性が得られた。さらに本発明の炊飯器を
用いてご飯を保温したところ、従来の炊飯器で保
温した場合と比べてご飯の劣化が少なく、ご飯粒
の黄変や臭いの発生が少なくなり、また抗菌作用
を有していることが判明し、保温においても効果
のあることがわかつた。 なお、本発明の実施例においては、遠赤外線放
射物質7aとして、第1表に示す組成の混合物を
使用したが、特にこれに限定されるものではな
く、酸化ニツケルを主成分とし、かつ酸化鉄、酸
化コバルト、酸化マンガンの少なくとも1種以上
を不純物とする混合物であればよい。 また、フツ素樹脂7bに含有される量は、本発
明の実施例においては20重量%としたが、これに
ついても、特に限定されるものではない。 但し、フツ素樹脂7bに対する前述した遠赤外
線放射物質7aの含有量は、5重量%〜40重量%
の範囲が理想的である。これは、5重量%以下で
は、遠赤外線放射特性が低下し、熱効率に対して
効果が見られなくなり、一方、40重量%を越える
と、フツ素樹脂7bの有する耐食性が著しく低下
するとともに、ご飯のこびりつき現象が増大し、
実用化に耐えられなくなるためである。 発明の効果 以上の説明から明らかなように本発明によれ
ば、遠赤外線放射物質として、酸化ニツケツを主
成分とし、酸化鉄、酸化コバルトおよび酸化マン
ガンの少なくとも1種以上を不純物とする混合物
を用いるとともに、内鍋の内面を前記遠赤外線放
射物質を含有するフツ素樹脂で被覆処理している
ため、熱効率の優れた炊飯器用鍋を提供すること
ができるものである。
[Table] As is clear from Table 2, compared to the conventional example using only fluororesin 7b, ZrO 2 or SiO 2
In Comparative Examples 1 and 2 treated with fluororesin 7b containing 20% by weight of nickel oxide, the thermal efficiency increased by only 7% or 5%, respectively. In the rice cooker of the present invention treated with
Thermal efficiency was increased and a remarkable effect was obtained. As described above, by coating the inner surface of the inner pot 7 with the fluororesin 7b containing 20% by weight of a mixture mainly composed of nickel oxide as the far-infrared emitting material 7a, the thermal efficiency could be significantly increased. . Moreover, no particular sticking of the rice was observed during cooking, and the same characteristics as the inner pot 7 coated with a conventional fluororesin were obtained. Furthermore, when rice was kept warm using the rice cooker of the present invention, there was less deterioration of the rice, less yellowing of the rice grains and less odor, and it also has antibacterial properties. It was found that it was effective in keeping people warm. In the examples of the present invention, a mixture having the composition shown in Table 1 was used as the far-infrared emitting material 7a, but the mixture is not particularly limited to this, and contains nickel oxide as the main component and iron oxide as the main component. Any mixture may be used as long as the impurity is at least one of cobalt oxide, manganese oxide, and manganese oxide. Further, although the amount contained in the fluororesin 7b was set to 20% by weight in the examples of the present invention, it is not particularly limited to this either. However, the content of the above-mentioned far-infrared emitting substance 7a with respect to the fluororesin 7b is 5% by weight to 40% by weight.
A range of is ideal. If it is less than 5% by weight, the far-infrared radiation characteristics will deteriorate and there will be no effect on thermal efficiency. On the other hand, if it exceeds 40% by weight, the corrosion resistance of the fluororesin 7b will be significantly reduced, and the The sticking phenomenon increases,
This is because it becomes unsustainable for practical use. Effects of the Invention As is clear from the above description, according to the present invention, as a far-infrared emitting substance, a mixture containing nickel oxide as a main component and at least one of iron oxide, cobalt oxide, and manganese oxide as an impurity is used. In addition, since the inner surface of the inner pot is coated with a fluororesin containing the far-infrared emitting substance, it is possible to provide a rice cooker pot with excellent thermal efficiency.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す炊飯器の断面
図、第2図は同炊飯器における内鍋の要部拡大断
面図である。 7……内鍋、7a……遠赤外線放射物質、7b
……フツ素樹脂。
FIG. 1 is a sectional view of a rice cooker showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part of an inner pot in the same rice cooker. 7... Inner pot, 7a... Far-infrared emitting material, 7b
...Fluorine resin.

Claims (1)

【特許請求の範囲】[Claims] 1 遠赤外線放射物質として、酸化ニツケルを主
成分とし、酸化鉄、酸化コバルトおよび酸化マン
ガンの少なくとも1種以上を不純物とする混合物
を用いるとともに、内鍋の内面を前記遠赤外線放
射物質を含有するフツ素樹脂で被覆処理したこと
を特徴とする炊飯器用鍋。
1. As the far-infrared emitting substance, a mixture containing nickel oxide as a main component and at least one of iron oxide, cobalt oxide, and manganese oxide as an impurity is used, and the inner surface of the inner pot is covered with a lid containing the far-infrared emitting substance. A rice cooker pot characterized by being coated with a base resin.
JP7693585A 1985-04-11 1985-04-11 Rice cooker Granted JPS61234820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7693585A JPS61234820A (en) 1985-04-11 1985-04-11 Rice cooker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7693585A JPS61234820A (en) 1985-04-11 1985-04-11 Rice cooker

Publications (2)

Publication Number Publication Date
JPS61234820A JPS61234820A (en) 1986-10-20
JPH0569531B2 true JPH0569531B2 (en) 1993-10-01

Family

ID=13619582

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7693585A Granted JPS61234820A (en) 1985-04-11 1985-04-11 Rice cooker

Country Status (1)

Country Link
JP (1) JPS61234820A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6227530U (en) * 1985-08-02 1987-02-19
JPS63158225U (en) * 1987-04-03 1988-10-17
JPS644336U (en) * 1987-06-26 1989-01-11
JP7050393B2 (en) * 2019-02-27 2022-04-08 京豊エンジニアリング株式会社 Rice cooker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918604A (en) * 1972-06-05 1974-02-19
JPS5436881A (en) * 1977-08-24 1979-03-17 Toushin Puresu Kougiyou Kk Cooking utensil with far infrared ray generating layer
JPS5933287U (en) * 1982-08-26 1984-03-01 河口湖精密株式会社 holder
JPS6021236B2 (en) * 1978-02-01 1985-05-25 株式会社日立製作所 Manufacturing method of high recording density magnetic disk

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5971717U (en) * 1982-11-08 1984-05-16 山田 弘 Far-infrared radiator with corrosion resistance, wear resistance, and non-stick properties
JPS6021236U (en) * 1983-07-19 1985-02-14 日本電熱株式会社 infrared radiant cooker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918604A (en) * 1972-06-05 1974-02-19
JPS5436881A (en) * 1977-08-24 1979-03-17 Toushin Puresu Kougiyou Kk Cooking utensil with far infrared ray generating layer
JPS6021236B2 (en) * 1978-02-01 1985-05-25 株式会社日立製作所 Manufacturing method of high recording density magnetic disk
JPS5933287U (en) * 1982-08-26 1984-03-01 河口湖精密株式会社 holder

Also Published As

Publication number Publication date
JPS61234820A (en) 1986-10-20

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