JPH03160224A - Heating cooker - Google Patents

Abstract

PURPOSE:To enable execution of self-cleaning of the interior of a chamber at a low temperature by a method wherein a ceramic fiber layer carrying a catalyst oxide and a metallic fiber layer carrying a catalyst oxide formed on the ceramic fiber layer are formed on an inner wall, and alcohol is sprayed through two kinds of the fiber layers and an outer wall. CONSTITUTION:When a heating means 2, e.g. an electric heater, a gas burner, and a microwave oscillator, is operated to heat food 5, a light component 6 is gasified and adhered to a metallic fiber layer 7 carrying a catalyst oxide. Though a part of the adhered light component is vaporized, a rest permeates through the porous metallic fiber layer to a ceramic fiber layer 8 carrying a catalyst oxide. Through repetition of heating of the food, heavy carbonated contaminant is increased throughout the whole of the two tiber layers. When contamination is increased, alcohol is sprayed from an alcohol feeding device 9 extending through two kinds of the fiber layers and an outer wall 1 of a heating cooker and caused to permeate two kinds of the fiber layers. When through operation of a heating means 2, alcohol adsorbed by the fiber layers is burnt at a low temperature, the temperature of the fiber layers is increased, and a heavy carbonated contaminant is simultaneously burnt.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、電気，ガスなどの熱源を用いて調理する電気
オーブン．ガスグリルなどの加熱調理器に関するもので
ある。と《に、調理に伴って室内に飛散する油などの有
機性の汚れを熱により分解浄化する加熱調理器に関する
ものである。すなわち、肉や魚などの調理物から飛散し
た油，蛋白質．炭水化物などの種々の有機物を熱的に燃
焼させ、室内を清潔な状態に戻す、いわゆる熱セルフク
リーニングを行なう加熱調理器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric oven for cooking using a heat source such as electricity or gas. This relates to heating cookers such as gas grills. In particular, it relates to a cooking device that uses heat to decompose and purify organic dirt such as oil that is scattered indoors during cooking. In other words, oil and protein scattered from cooked foods such as meat and fish. The present invention relates to a heating cooker that performs so-called thermal self-cleaning, which thermally burns various organic substances such as carbohydrates and returns the interior to a clean state.

従来の技術 従来のこの種の加熱調理器は第２図に示すように加熱調
理器の外壁ｌの内部に加熱手段２、調理室３と膜厚０．
５ｍｍ以下の被覆Ｎ４を有するものである。このような
構戒において油汚れを分解する方法としては、熱セルフ
クリーニング法と連続セルフクリーニング法が知られて
いる．前者は、被覆層４に耐熱衝撃性に優れた緻密な耐
酸性耐熱ホーロを被覆材として用い、前記被覆層を加熱
千段２により５００〜５５０゜Ｃに加熱して、有機性の
汚れを燃焼させて室内をきれいにするものである。後者
は、金属酸化物もしくは貴金属などからなる酸化触媒な
どをホーロ，耐熱塗膜などの被覆層中に担持または分散
させて用い、加熱調理時の熱のみにより室内の汚れを触
媒的に分解するものである。2. Description of the Related Art A conventional cooking device of this type has a heating means 2, a cooking chamber 3, and a film thickness of 0.5 mm inside an outer wall 1 of the cooking device, as shown in FIG.
It has a coating N4 of 5 mm or less. Thermal self-cleaning method and continuous self-cleaning method are known as methods for decomposing oil stains in such a system. In the former method, a dense acid-resistant heat-resistant hollow material with excellent thermal shock resistance is used as the coating material for the coating layer 4, and the coating layer is heated to 500 to 550 degrees Celsius in a heating stage 2 to burn off organic dirt. This is to clean the room. The latter uses an oxidation catalyst made of metal oxides or precious metals supported or dispersed in a coating layer such as a hollow or heat-resistant coating, and catalytically decomposes indoor dirt using only the heat during cooking. It is.

発明が解決しようとする課題 しかしながら上記のような後者の連続式セルフクリーニ
ングについては、調理時の温度のみでは温度が低いため
浄化能力が不十分で、触媒も調味量などで汚染されてし
まうと比較的短時間で浄化能力が低下してしまうという
課題があった。また、油汚れの程度が著しい場合も、十
分な浄化能力がなかった。その点で前者の熱セルフクリ
ーニングの場合は、浄化効果は十分であったが、５００
〜５５０゜Ｃと高温を必要とするため、調理器のオーブ
ンの断熱構造は複雑で高価なものとなっていた。Problems to be Solved by the Invention However, regarding the latter type of continuous self-cleaning mentioned above, the purification ability is insufficient due to the low temperature when cooking only, and the catalyst is also contaminated by the amount of seasoning. There was a problem in that the purification ability decreased in a short period of time. In addition, even when the degree of oil stains was significant, there was no sufficient cleaning ability. In this respect, in the case of the former thermal self-cleaning, the purification effect was sufficient, but the
Since a high temperature of ~550°C is required, the insulation structure of the cooker oven has become complicated and expensive.

また、そのようなホーロ製のオーブンは、ホーロ焼或の
ための８００〜９００’Ｃの加熱による熱変形に耐え得
るように、基材は０．８〜１叩の比較的厚い板材を用い
る必要があり、このためオープンの熱容量が大きくなり
、温度の立上がりが遅くなることも！ｌ題であった。ま
た、ホーロ，耐熱塗膜は０．５ｍｍ以上の厚さにすると
、汚れの浄化能力は向上するが、耐熱衝撃性が低下する
ことも課題であった． 本発明はこのような従来の課題を解央するもので、低温
で十分な浄化勅果のあるｊＪｌ’ｌ熱羽理器を提供する
ものである。In addition, in such an enameled oven, the base material must be a relatively thick plate material with a thickness of 0.8 to 1 pound so that it can withstand thermal deformation caused by heating at 800 to 900'C for enameled baking. Therefore, the heat capacity of the open circuit becomes large, and the temperature rise may be delayed! It was a topic. Further, when the hollow and heat-resistant coating film is made thicker than 0.5 mm, the stain purification ability improves, but there is also a problem in that the thermal shock resistance decreases. The present invention solves the above-mentioned problems in the prior art, and provides a heat filter that has sufficient purification effect at low temperatures.

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加熱調理器は調理室
の内壁に酸化触媒を担持したセラくノクｗＡ維層とその
セラミノク繊維層の上に酸化触媒を担持した金属織維層
を設け、前記２種類の織維層と加熱調理器の外壁とを貫
通してアルコール供袷装置を設けたものである。Means for Solving the Problems In order to solve the above problems, the heating cooker of the present invention includes a Ceraminoku wA fiber layer supporting an oxidation catalyst on the inner wall of the cooking chamber, and an oxidation catalyst supported on the Ceraminoku fiber layer. A metal woven fiber layer is provided, and an alcohol offering device is provided by penetrating the two types of woven fiber layers and the outer wall of the cooking device.

作用 調理室内の汚れは、有機賞と無機質とに分けられるが、
とくに著しい汚れを生しるのは有機質であり、食品を構
成する澱拐，たん白質，油脂類がその中心である。その
元素は、炭素，水素，酸素窒素，リン，硫黄などからな
る。食品を加熱すると、軽質の戒分がガス化して調理室
内壁に付着し時間の経過と共に重質化する。この結果、
分解し難い炭素を主体とした汚れが残留する。この重炭
素質化した汚れが調理室内壁にこびりつき、内壁を非常
に汚す。Dirt inside the cooking chamber can be divided into organic and inorganic.
Particularly significant stains are caused by organic substances, mainly starch, proteins, and fats and oils that make up food. The elements include carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. When food is heated, light ingredients gasify and adhere to the walls of the cooking chamber, becoming heavier over time. As a result,
Dirt mainly composed of carbon that is difficult to decompose remains. This heavy carbonaceous dirt sticks to the walls of the cooking chamber, making the inner walls extremely dirty.

本発明では、調理室の内壁に酸化触媒を担持したセラミ
ノク繊維層を設け、前記セラミノク繊維層の上に酸化触
媒を推持した金属繊維層を設けてあるが、この構或でも
汚れは調理室内壁が多孔質であるため中まで浸透し、拡
散することはあるが、調理時の熱影響のレベルでは触媒
的に完全酸化が進むまでには到らず、重炭素質化した汚
れが調理室内壁に残留する。この状態で別途、配置した
アルコール供給装置から調理室内壁にアルコールを噴霧
する。In the present invention, a ceramic fiber layer supporting an oxidation catalyst is provided on the inner wall of the cooking chamber, and a metal fiber layer supporting an oxidation catalyst is provided on the ceramic fiber layer. Because the walls are porous, it can penetrate and diffuse into the interior, but at the level of heat during cooking, complete catalytic oxidation does not occur, and heavy carbon dirt remains in the cooking chamber. Remains on the wall. In this state, alcohol is sprayed onto the cooking chamber wall from a separately arranged alcohol supply device.

その後、加熱手段により、室内を加熱すれば、１１）Ｏ
〜２００’Ｃの低温で、繊維層に吸着したアルコールが
燃焼して繊維層の温度が上がり、重炭素質化した汚れも
同時に燃焼する。このため、格別な加熱手段を追加して
もつ必要がなく、極めて低温で室内のセルフクリーニン
グが達戒できる。After that, if the room is heated by the heating means, 11) O
At a low temperature of ~200'C, the alcohol adsorbed on the fiber layer burns, raising the temperature of the fiber layer, and the heavy carbon dirt is also burned at the same time. Therefore, there is no need for additional special heating means, and indoor self-cleaning can be achieved at extremely low temperatures.

実施例 以下、本発明の一実施例について第１図を参照しながら
説明する。図に示すようにＦ−Ｆ’　而（第１図（ａ）
参照）での断面を示すと第１図（ｂ）の構戒となる。電
気ヒータ，ガスハーナ．マイクロ波発振器などの加熱千
段２を作動して食品５を加熱すると軽質或分６がガス化
し、酸化触媒を担持した厚さ０．５ｎｎの金属織維層７
に付着する。伺着した軽質分の一部は茎発するが、残部
は多孔質の金属繊維層中を浸透し酸化触媒を担持した厚
さ０．３　ｍのセラく冫ク繊維層８まで侵透し、食品加
熱を繰り返すと両繊維層全体に重炭素ｕ化した汚れが次
第に増加する。汚れがひどくなった時、前記２種類の繊
維層と加熱調理器外璧ｌを貫通して設けたアルコール｛
Ｊｌｌ給装置９からのアルコールを噴霧し、前記２種類
の礒維層に浸透させ、加熱千段２を作動すると１００〜
２００゜Ｃの低温で織維層に喚着したアルコールが燃焼
すると繊維層の温度が上がり、重炭素質化した汚れも同
時に燃焼した。EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. As shown in the figure, F-F' (Figure 1 (a)
The cross-section at (see) is shown in Figure 1(b). Electric heater, gas heater. When the food 5 is heated by operating a heating stage 2 such as a microwave oscillator, the light part 6 is gasified, and a metal woven fiber layer 7 with a thickness of 0.5 nn carrying an oxidation catalyst is formed.
Attach to. A part of the light matter that has arrived is released from the stem, but the remaining part penetrates into the porous metal fiber layer and penetrates to the 0.3 m thick ceramic fiber layer 8 supporting the oxidation catalyst, and becomes a food product. When heating is repeated, heavy carbon stains gradually increase throughout both fiber layers. When the stains become severe, the alcohol provided through the two types of fiber layers and the outer wall of the heating cooker {
When the alcohol from the Jll feeding device 9 is sprayed and permeated into the two types of fibrous layers, and the heating stage 2 is activated, the temperature rises to 100~
When the alcohol adhering to the woven fiber layer was burned at a low temperature of 200°C, the temperature of the fiber layer rose and the heavy carbonaceous dirt was also burned at the same time.

両繊維層に担持する酸化触媒としては、従来公知のＰｔ
，Ｐｄなとの貴金属系、Ｆｅ，ＭｎＣｕ，Ｎｉ，Ｃｏな
ど遷移金属酸化物系、ＡＢＯ．のべロブスカイト構造を
有する複合酸化物系などが適用可能であるが、とくに本
発明の場合は、高活性を実現するのに触媒を多量に用い
ると有利となること、また、各種被毒にも強いことが必
要なため、安価なＦｅ，Ｍｎ，Ｃｕ，Ｎｉ，Ｃｏの群か
ら選定したＩ種以上の元素を含む酸化物系触媒と触媒燃
焼に高活性を示すＣｅ酸化物を同時に含有する触媒を用
いるのが望ましい。As the oxidation catalyst supported on both fiber layers, the conventionally known Pt
, noble metals such as Pd, transition metal oxides such as Fe, MnCu, Ni, Co, ABO. Composite oxide systems having a noberovskite structure can be applied, but especially in the case of the present invention, it is advantageous to use a large amount of catalyst to achieve high activity, and it is also effective against various poisonings. Since strength is required, a catalyst that simultaneously contains an oxide catalyst containing elements of Class I or higher selected from the inexpensive group of Fe, Mn, Cu, Ni, and Co, and Ce oxide that exhibits high activity in catalytic combustion. It is preferable to use

触媒は以下の方法で作威したものを用いることができる
。すなわち前記元素の金属塩水｝容液から水酸化物とし
て共沈させ、焼戒したもの、炭酸塩などを混合し、焼威
したもの、または、酸化物を混合し、焼威したもののい
ずれの方法で作成したものでもよい。これらの中では硝
酸水溶液から共沈させ焼戒したものが最も活性が高い。A catalyst prepared by the following method can be used. In other words, any of the following methods: Co-precipitated as a hydroxide from a solution of metal salt water of the above element and burned, mixed with carbonate etc. and burned, or mixed with an oxide and burned. It may also be one created by. Among these, those co-precipitated from an aqueous nitric acid solution and burned have the highest activity.

サラダ油を用いて複合金属酸化物と混合して、燃焼させ
る方法を用いて評価した活性テストでは、ＣｅＣｕ，Ｉ
Ｍｒｆｆｉ−ｘ○，（０＜ｘ＜１，ｙ＞ｏ）で表わされ
る触媒が優れた活性を示した。とくに、ｘ　−　０．３
，　　ｙ　＝　０．７のＣ　ｅ　Ｃｕａ．ｉＭｎｏ．ｑ
○３の組成が最良であった。以下の実施例では、当触媒
を用いた。In the activity test, which was evaluated using a method of mixing salad oil with composite metal oxide and burning it, CeCu,I
The catalyst represented by Mrffi-x○, (0<x<1, y>o) showed excellent activity. In particular, x − 0.3
, y = 0.7 C e Cua. iMno. q
The composition of ○3 was the best. This catalyst was used in the following examples.

セラもンク繊維としては、Ｓｉ○２系，Ａｌ２０３系，
Ｚｒ○２系およびこれらのｌ昆合系などがあるが、いず
れも適用可能である。Ceramonic fibers include Si○2 series, Al203 series,
There are Zr○2 series and their combination series, and both are applicable.

酸化触媒を含有するセラミック繊維としては、抄紙時に
触媒を懸濁した状態で抄紙し、厚さ０．５躯程度のセラ
ミックペーパー状とする。これらのセラミンク繊維への
触媒の担持量としては、２０〜５０％、セラミノク繊維
の多孔度は７０〜８０％の範囲で用いるのが望ましい。Ceramic fibers containing an oxidation catalyst are made into paper with the catalyst suspended during paper making, and are made into a ceramic paper having a thickness of about 0.5 strands. The amount of catalyst supported on these ceramic fibers is preferably 20 to 50%, and the porosity of the ceramic fibers is preferably 70 to 80%.

２０％未満の場合、触媒効果が劣り、５０％を超えると
繊維の強度が保持できなかったり、触媒粉末が脱落した
りし易くなるためである。金属繊維としては、ステンレ
ス不織布またはアルミニウム不織布を圧着または焼威し
た繊維体をベースに、その表面をエッチング、もしくは
無機バインダーによりプレコートした後、前記触媒を担
持して用いる。If it is less than 20%, the catalytic effect will be poor, and if it exceeds 50%, the strength of the fibers will not be maintained or the catalyst powder will easily fall off. The metal fiber is based on a fibrous body obtained by pressing or burning a stainless steel nonwoven fabric or an aluminum nonwoven fabric, the surface of which is etched or precoated with an inorganic binder, and then the catalyst is supported thereon.

以下に調理室内への適用例を示す。セラミノク織維とし
てシリカアルミナ繊維、内部にＣｅＣｕｅ．ｓＭｎｏ．
＋０３触媒を５０−ｔ％含有させたセラミックペーパー
を作威し、さらにこの上ニ東洋カーボン■製アルミニウ
ム繊維多孔体ｒＰＯＡＬＪ　　（商品名）をＱ，５ｍｍ
の厚みで積層して端面をかしめ、オープンを作威した。An example of application in a cooking room is shown below. Silica alumina fibers are used as ceraminoku woven fibers, and CeCue. sMno.
Ceramic paper containing 50-t% of +03 catalyst was prepared, and on top of this, a porous aluminum fiber rPOALJ (trade name) manufactured by Toyo Carbon ■ was coated with a thickness of Q, 5 mm.
Laminated to a thickness of

５ｋｗの電気ヒータを用いて、この中で魚として、アジ
３匹　サンマ４匹，鳥モモ２本をそれぞれ料理し、これ
をｌサイクルとして、５サイクル繰り返した。Three horse mackerel, four Pacific saury, and two chicken thighs were each cooked in the electric heater using a 5 kW electric heater, and each cycle was repeated for 5 cycles.

内崩を従来の何も処理しない従来のステンレス製オーブ
ンの場合、調理室内は油汚れで著しい状態となった。In the case of conventional stainless steel ovens that do not undergo any conventional treatment for implosion, the inside of the cooking chamber is heavily contaminated with oil.

次に、調理室内に２種類の織維層を設けた加熱調理器の
弓れの程度は１７′５位と軽跋されたが、汚れは目立つ
状態であった。何も処理しないステンレスの場合、５５
０’Ｃ．　　２時間の熱処理で汚れはきれいになったが
、前記加熱調理器では３５０゜Ｃ，３０分できれいにな
った。次に前記加熱調理器の繊維層にエチルアルコール
を１０ｍｌ噴霧した後、熱処理した場合２５０’Ｃ．　
３０分で調理室は浄化された。Next, the degree of bowing of the heating cooker with two types of woven fiber layers in the cooking chamber was modest at 17'5, but the stains were noticeable. In the case of stainless steel without any treatment, 55
0'C. The stains were cleaned by heat treatment for 2 hours, but they were cleaned by heating at 350°C for 30 minutes using the heating cooker. Next, after spraying 10 ml of ethyl alcohol onto the fiber layer of the heating cooker, heat treatment was performed at 250'C.
The galley was purified in 30 minutes.

以上のようにアルコールを噴霧した後、加熱すると低温
で短時間で調理室がセルフクリーニングされることを確
認した。また、浄化後調理室内には臭いなどは全くなか
った。アルコールとしては食品との関係でエチルアルコ
ールが良い。アルコール供給装置としては、霧吹きなど
を用いることができる。アルコールは７８゜Ｃで沸騰す
るが昇温の途中で発熱反応を起こし、局部的な温度上昇
を生じることが、低温での触媒反応を活性化することに
よるのではないかと推定される。After spraying alcohol as described above, it was confirmed that the cooking chamber self-cleaned in a short time at low temperatures when heated. Furthermore, there was no odor at all in the cooking chamber after purification. As for alcohol, ethyl alcohol is preferred due to its relationship with food. As the alcohol supply device, a sprayer or the like can be used. Although alcohol boils at 78°C, it is presumed that an exothermic reaction occurs during the temperature rise, resulting in a localized temperature rise, which activates the catalytic reaction at low temperatures.

発明の効果 以上のように本発明の加熱調理器によれば、次の効果が
得られる。Effects of the Invention As described above, the heating cooker of the present invention provides the following effects.

（１）アルコール供給装置を設け、セルフクリーニング
前に調理室内壁にアルコールを噴霧する構戒としている
ので従来より低温でセルフクリーニングできるという効
果がある。(1) Since an alcohol supply device is provided and alcohol is sprayed onto the walls of the cooking chamber before self-cleaning, there is an effect that self-cleaning can be performed at a lower temperature than before.

（２）酸化触媒を担持したセラξンク繊維層の上に酸化
触媒を担持した金属繊維層を設けた構或としているので
従来より膜厚を厚くても耐熱衝撃性の優れた調理室内壁
ができるという効果がある。(2) Since the metal fiber layer carrying an oxidation catalyst is provided on the ceramic fiber layer carrying an oxidation catalyst, the inner wall of the cooking chamber has excellent thermal shock resistance even if the film thickness is thicker than before. There is an effect that it can be done.

（３）酸化触媒を担持した金属繊維層を設けた構戒とし
ているので加熱手段としてマイクロ波発振器を使用して
も電波吸収が少ないため膜厚が厚くても食品加熱中に調
理室内壁温度の上昇が少ないという効果がある。(3) Since the structure is equipped with a metal fiber layer that supports an oxidation catalyst, even if a microwave oscillator is used as a heating means, there is little radio wave absorption. This has the effect of reducing the rise.

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

第１図（ａ），　（ｂ）は本発明の実施例における加熱
調理器の斜視図と断面図、第２図（ａ）．　（ｂ）は従
来の加熱調理器の斜視図と断面図である。 １・・・・・・加熱調理器の外壁、２・・・・・加熱手
段、３・・・・・・調理室、７・・・・・・酸化触媒を
担持した金属繊維層、８・・・・・・酸化触媒を担持し
たセラミンク鴎維層、９・・・・・・アルコール供給！
！。FIGS. 1(a) and 1(b) are a perspective view and a sectional view of a heating cooker according to an embodiment of the present invention, and FIG. 2(a). (b) is a perspective view and a sectional view of a conventional heating cooker. DESCRIPTION OF SYMBOLS 1... External wall of heating cooker, 2... Heating means, 3... Cooking chamber, 7... Metal fiber layer supporting oxidation catalyst, 8... ...Ceramink seaweed fiber layer supporting oxidation catalyst, 9...Alcohol supply!
! .

Claims (2)

【特許請求の範囲】[Claims] （１）加熱手段と調理室を備えた加熱調理器において、
調理室の内壁に酸化触媒を担持したセラミック繊維層と
そのセラミック繊維層の上に酸化触媒を担持した金属繊
維層を設け、前記２種類の繊維層と加熱調理器の外壁と
を貫通してアルコール供給装置を設けた加熱調理器。(1) In a heating cooker equipped with a heating means and a cooking chamber,
A ceramic fiber layer supporting an oxidation catalyst is provided on the inner wall of the cooking chamber, and a metal fiber layer supporting an oxidation catalyst is provided on the ceramic fiber layer, and the alcohol is passed through the two types of fiber layers and the outer wall of the cooking device. A heating cooker equipped with a feeding device. （２）酸化触媒としてセリウム、銅、マンガン、コバル
ト、ニッケル、鉄の群から選んだ１種以上の元素の酸化
物を用いてなる請求項１記載の加熱調理器。(2) The cooking device according to claim 1, wherein the oxidation catalyst is an oxide of one or more elements selected from the group consisting of cerium, copper, manganese, cobalt, nickel, and iron.