JPH0527831Y2 - - Google Patents
Info
- Publication number
- JPH0527831Y2 JPH0527831Y2 JP1987141772U JP14177287U JPH0527831Y2 JP H0527831 Y2 JPH0527831 Y2 JP H0527831Y2 JP 1987141772 U JP1987141772 U JP 1987141772U JP 14177287 U JP14177287 U JP 14177287U JP H0527831 Y2 JPH0527831 Y2 JP H0527831Y2
- Authority
- JP
- Japan
- Prior art keywords
- food
- heat
- heating element
- microwave
- cooked
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 23
- 239000000919 ceramic Substances 0.000 claims description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 229910021426 porous silicon Inorganic materials 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 10
- 238000010411 cooking Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000002844 melting Methods 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000003670 easy-to-clean Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000036528 appetite Effects 0.000 description 1
- 235000019789 appetite Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は、マグネトロンから放出されるマイク
ロ波の照射により被調理物自体を内部から発熱さ
せる以外に外から熱を与えて被調理物に焦げ目を
付ける電子レンジ用発熱体に関するものである。[Detailed description of the invention] <Industrial application field> This invention not only generates heat from the inside of the food itself by irradiating microwaves emitted from a magnetron, but also applies heat from the outside to brown the food. The present invention relates to a heating element for microwave ovens.
〈従来の技術〉
通常電子レンジはマグネトロンから放出された
マイクロ波を導波管を介してオーブン庫内に導い
て被調理物に照射し、被調理物自体を発熱させて
調理を行なう調理器である。従つて被調理物に焦
げ目がないことによつて食欲をそそらないという
欠点がある。そこで現在被調理物に焦げ目を付け
る目的で、被調理物に外から熱を与える発熱体を
オーブン庫内に設置した電子レンジがある。代表
的な具体例を次に記述する。<Prior art> A microwave oven is a cooking device that typically cooks food by guiding microwaves emitted from a magnetron into the oven chamber through a waveguide and irradiating the food to be cooked, thereby generating heat in the food itself. be. Therefore, there is a drawback that the food to be cooked does not have brown marks and does not stimulate the appetite. Therefore, there are currently microwave ovens in which a heating element is installed inside the oven chamber to apply heat to the food from the outside in order to brown the food. A typical example will be described next.
・ シーズヒーター内蔵方式…
シーズヒーターを庫内に内蔵し、熱放射によ
り被調理物みにげ目をつける。・ Built-in sheathed heater: A sheathed heater is built into the oven, and the heat radiates to give an appearance to the food being cooked.
・ 真空蒸着紙方式…
アルミニウム真空蒸着紙の上に被調理物を置
き、熱伝導により焦げ目をつける。・Vacuum-deposited paper method: Food to be cooked is placed on vacuum-deposited aluminum paper and browned by heat conduction.
・ フエライト粉末コーテイング方式…
陶磁器製容器の底にフエライト粉末をコーテ
イングし、この上に被調理物を置き熱伝導によ
り焦げ目をつける。- Ferrite powder coating method: The bottom of a ceramic container is coated with ferrite powder, and the food to be cooked is placed on top of this to brown the food by heat conduction.
〈考案が解決しようとする問題点〉
ところが、前述のような従来方式では次の様な
問題点があつた。<Problems to be solved by the invention> However, the conventional method described above has the following problems.
・ シーズヒーター内蔵方式…
熱源としてマグネトロンとヒーターを必要と
するため構成が複雑となりコストアツプの要因
となる。一方、熱放射による焦げ目付けのため
焦げ目付け時間が長い。- Built-in sheathed heater system: requires a magnetron and heater as a heat source, which complicates the configuration and increases costs. On the other hand, the browning time is long because the browning is done by heat radiation.
・ 真空蒸着紙方式…
基材に紙を使用しているため、一度使用した
ら変色変形し使えない。又発熱効率が低いため
あまり高温にならない。・Vacuum-deposited paper method: Since paper is used as the base material, it discolors and deforms once used, making it unusable. Also, since the heat generation efficiency is low, the temperature does not reach very high.
・ フエライト粉末コーテイング方式…
発熱効率が低く、最初から被調理物を設置し
ておくと温度があまり上がらない。焦げ目を付
けるためには発熱体自身をまず昇温させその後
被調理物を置き再度マイクロ波を照射する必要
があり手間がかかる。又発熱体自体に食品がこ
びり付き易く、清掃性が劣る。- Ferrite powder coating method...The heat generation efficiency is low, so if the food to be cooked is placed in it from the beginning, the temperature will not rise much. In order to brown the food, it is necessary to first raise the temperature of the heating element itself, then place the food to be cooked and irradiate it with microwaves again, which is time-consuming. Furthermore, food tends to stick to the heating element itself, resulting in poor cleaning performance.
〈考案の目的〉
本考案は、この様な問題点を全て解決できるも
のであり、極めて簡単な装置で短時間に効率良く
焦げ目を付けられ、しかも食品汚染に対する清掃
性が優れた電子レンジ用発熱体を提供することを
目的とするものである。<Purpose of the invention> The present invention can solve all of these problems, and is a heating device for microwave ovens that can brown food efficiently in a short period of time with an extremely simple device, and is easy to clean to prevent food contamination. The purpose is to provide the body.
〈問題点を解決するための手段〉
前記問題点を解決するためにマイクロ波透過性
及び断熱性を有する受皿を用い、この上に少なく
とも一方の面に低融点フリツト（例えばZnO−
B2O3系フリツト）を被覆、焼成処理によりガラ
ス層を形成せしめた多孔質炭化珪素セラミツク成
形板を設置した電子レンジ用発熱体とする。<Means for solving the problem> In order to solve the above problem, a saucer having microwave permeability and heat insulation properties is used, and a low melting point frit (for example, ZnO-
A heating element for a microwave oven is equipped with a porous silicon carbide ceramic molded plate coated with B 2 O 3 type frit and formed with a glass layer by firing.
〈作用〉
マイクロ波が照射されると同時に多孔質炭化珪
素系セラミツク成形板はマイクロ波を吸収且つ熱
変換して急速に昇温する。この時、該成形板を支
えている受皿はマイクロ波を透過するが断熱性を
有するため成形板の昇温を助長する。又、炭化珪
素系セラミツク成形板上に接触している被調理物
はマイクロ波から直接加熱（誘電加熱）されると
共に前記成形板から熱伝導により加熱され焦げ目
がつく。又、炭化珪素系セラミツク成形板には、
低融点フリツトで焼成被覆した表面のなめらかな
ガラス層が形成されているので、食品が発熱体に
こびり付きにくくて食品が取り出し易いと共に調
理後の清掃性も良好となり、極めて手間のかから
ない焦げ目付調理がおこなわれる。<Function> At the same time as the microwave is irradiated, the porous silicon carbide ceramic molded plate absorbs the microwave, converts it into heat, and rapidly rises in temperature. At this time, the saucer supporting the molded plate transmits microwaves, but has heat insulating properties, which promotes temperature rise of the molded plate. Further, the food to be cooked that is in contact with the silicon carbide ceramic molded plate is heated directly by the microwave (dielectric heating) and is also heated by heat conduction from the molded plate and browned. In addition, the silicon carbide ceramic molded plate has
A smooth glass layer is formed on the surface, which is baked and coated with low melting point frit, making it difficult for food to stick to the heating element, making it easy to take out food, and making it easy to clean after cooking, allowing for extremely hassle-free browning cooking. It is carried out.
〈実施例〉
以下、本考案の好適な一実施例を図面に基いて
詳細に説明する。<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail based on the drawings.
第１図は、電子レンジの概略図である。マイク
ロ波加熱用の熱源となるマグネトロン１から発信
されたマイクロ波は導波管２に導かれて照射口３
からオーブン４内へ照射される。オーブン４内に
照射されたマイクロ波は被調理物６に吸収され、
これを加熱する。同時に被調理物６を透過したり
或いは被調理物６に照射されない側部或いは低部
からのマイクロ波は発熱体５に吸収され熱変換さ
れる事により発熱体５自身が急速に昇温され接触
している被調理物６の底面に熱を伝えこれに焦げ
目を付けることになる。そして、焦げ目をつける
必要のない調理の時は発熱体６をオーブン４から
取り出しておく。 FIG. 1 is a schematic diagram of a microwave oven. Microwaves emitted from a magnetron 1, which serves as a heat source for microwave heating, are guided to a waveguide 2 and sent to an irradiation port 3.
The inside of the oven 4 is irradiated from there. The microwave irradiated into the oven 4 is absorbed by the food to be cooked 6,
Heat this. At the same time, microwaves transmitted through the food to be cooked 6 or from the side or lower part that are not irradiated to the food to be cooked 6 are absorbed by the heating element 5 and converted into heat, causing the heating element 5 itself to rapidly rise in temperature and come into contact with it. The heat is transferred to the bottom surface of the food 6 to be cooked, thereby browning it. When cooking does not require browning, the heating element 6 is removed from the oven 4.
第２図は発熱体５の構造図である。 FIG. 2 is a structural diagram of the heating element 5.
マイクロ波の透過性及び断熱性を有する多孔質
セラミツク受皿５ａとその上に空気断熱層５ｄを
介して表面に800℃以下で溶融する低融点フリツ
トで焼成被膜されたガラス層５ｃが形成された多
孔質炭化珪素系セラミツク成形板から成る発熱部
材５ｂが載置されている。800℃以下で溶融する
フリツトを使用する理由は、この温度以上で溶融
するフリツトを使用すると、焼成時、炭化珪素系
セラミツク中に微量存在するフリーカーボン或い
は酸化鉄等がフリツト或いは炉内雰囲気中の酸素
と反応して被膜層にフクレやキレツ等の欠陥を生
じるためである。又、食品安全衛生の問題や、被
覆基材となる炭化珪素セラミツクとの熱膨張率が
近いことからZnO−B2O3系フリツトの焼成条件
700℃で10〜20分を使用することが最適である。
（一般的な低融点フリツトにはpboが含まれ食品
安全衛生上問題がある。又、熱膨張率が大きく異
なるフリツトを使用すると、発熱サイクル数が多
くなるに従つて被膜ガラス層に貫入現象やハクリ
現象が生じ、実用上問題がある。）
受皿５ａはマイクロ波の透過は許容し発熱部材
５ｂからの熱拡散をしゃ断するため、熱は主に被
調理物側に効率良く伝達されると共に、調理終了
後の発熱体５をオーブン４から取り出す時に手で
持てる温度に保持する役目をする。受皿５ａは、
多孔質セラミツクを使用する場合は吸水性、汚染
性、意匠性を向上するために表面に施釉しておく
ことが好ましい。 A porous ceramic tray 5a having microwave permeability and heat insulation properties, and a glass layer 5c coated with a low melting point frit that melts at 800° C. or lower on the surface thereof through an air insulation layer 5d. A heat generating member 5b made of a molded silicon carbide ceramic plate is mounted. The reason for using a frit that melts at temperatures below 800°C is that if a frit that melts at temperatures above this temperature is used, free carbon or iron oxide present in small amounts in the silicon carbide ceramic will be released into the frit or the furnace atmosphere during firing. This is because it reacts with oxygen and causes defects such as blisters and cracks in the coating layer. In addition, due to food safety and hygiene issues and the fact that the coefficient of thermal expansion is similar to that of silicon carbide ceramic, which is the coating base material, the firing conditions for ZnO-B 2 O 3- based frits are
It is optimal to use 10-20 minutes at 700 °C.
(General low-melting point frits contain PBO, which poses food safety and hygiene problems. Also, if frits with significantly different coefficients of thermal expansion are used, as the number of heat generation cycles increases, penetration into the coating glass layer may occur. A peeling phenomenon occurs, which is a practical problem.) Since the saucer 5a allows microwaves to pass through but blocks heat diffusion from the heat generating member 5b, heat is mainly efficiently transmitted to the food to be cooked, and It serves to keep the heating element 5 at a temperature that can be held by hand when taking it out from the oven 4 after cooking. The saucer 5a is
When using porous ceramics, it is preferable to glaze the surface to improve water absorption, stain resistance, and design.
発熱材５ｂは、多孔質炭化珪素系セラミツク成
形板から成つているため、発熱効率がひじように
良好であると共に軽くて熱衝撃性に優れている。
又ガラス層５ｃは、表面がなめらかであるため食
品がこびり付きにくく、又、調理後の清掃性が簡
単である。 Since the heat-generating material 5b is made of a porous silicon carbide-based ceramic molded plate, it has excellent heat-generating efficiency, is lightweight, and has excellent thermal shock resistance.
In addition, the glass layer 5c has a smooth surface, so food does not easily stick to it, and it is easy to clean after cooking.
第３図に気孔率45％で窒化珪素を30％（成分重
量比）を含んだ炭化珪素系セラミツク成形板を使
用した時のマイクロ波照射時間に対する平均（全
面に対する）表面温度の関係を示す。寸法は板厚
３mmで直径200mmの円板である。実線はマイクロ
波出力500W時、破線は1KW時の関係線図であ
り、その調理結果を第４図に示す。 Figure 3 shows the relationship between the average surface temperature (over the entire surface) and the microwave irradiation time when a silicon carbide ceramic molded plate with a porosity of 45% and a silicon nitride content of 30% (component weight ratio) is used. The dimensions are a circular plate with a thickness of 3 mm and a diameter of 200 mm. The solid line is the relationship diagram when the microwave output is 500W, and the broken line is the relationship diagram when the microwave output is 1KW, and the cooking results are shown in Figure 4.
〈考案の効果〉
以上詳述したように本考案の電子レンジ用発熱
体は、マイクロ波の透過性及び断熱性を有する受
皿と低融点フリツトのガラス層を少なくとも一方
の面に形成した多孔質炭化珪素セラミツク成形板
との間に空気断熱層を介して載置してなるので、
該多孔質炭化珪素セラミツク成形板の発熱による
熱が上記受皿に伝達されて加熱されるのを確実に
防止することができ、上記受皿をオーブンから取
り出す時に手で持てる温度により確実に保持する
ことができ、上記受皿をオーブンから手で取り出
す際に惹起する火傷等の障害を簡単な構成でより
確実に防止することができ、しかも発熱体は多孔
質炭化珪素セラミツク成形板からなるので、電子
レンジにおける発熱効率を非常に向上させること
ができると共に軽くて熱衝撃性に優れた電子レン
ジ用発熱体がえられ、そのうえ構造簡単で安価、
かつ焦げ目付け時間が短くて調理後の清掃性が良
い等の顕著な効果を奏する。<Effects of the invention> As detailed above, the heating element for a microwave oven of the invention is a porous carbonized material having a saucer having microwave permeability and heat insulation properties and a glass layer of low melting point frit formed on at least one surface. It is placed with an air insulation layer between it and a silicon ceramic molded plate, so
It is possible to reliably prevent the heat generated by the porous silicon carbide ceramic molded plate from being transmitted to the saucer and heat it, and it is possible to reliably hold the saucer at a temperature that can be held by hand when taking it out of the oven. This makes it possible to more reliably prevent injuries such as burns caused when taking the saucer out of the oven by hand with a simple configuration.Moreover, since the heating element is made of a porous silicon carbide ceramic molded plate, it can be used in a microwave oven. It is possible to obtain a heating element for microwave ovens that can significantly improve heat generation efficiency, is lightweight, and has excellent thermal shock resistance, and is also simple in structure, inexpensive, and
Moreover, it has remarkable effects such as short browning time and easy cleaning after cooking.
第１図は本考案の発熱体を載置した電子レンジ
の概略図。第２図は本考案の発熱体の構造図、第
３図は本考案の発熱体を使用した時のマイクロ波
照射時間と平均表面温度の関係図、第４図は、本
考案の発熱体を使用して実際の調理を行つた時の
状態を説明する図である。
符号、５ａ……受皿、５ｂ……発熱部材、５ｃ
……低融点フリツトのガラス層、５ｄ……空気断
熱層。
FIG. 1 is a schematic diagram of a microwave oven equipped with a heating element of the present invention. Figure 2 is a structural diagram of the heating element of the present invention, Figure 3 is a diagram of the relationship between microwave irradiation time and average surface temperature when the heating element of the present invention is used, and Figure 4 is a diagram of the heating element of the present invention. FIG. 4 is a diagram illustrating the state when the device is used for actual cooking. Code, 5a... saucer, 5b... heat generating member, 5c
...Low melting point fritted glass layer, 5d...Air insulation layer.
Claims (1)
目を付けるための発熱体であつて、 マイクロ波の透過性及び断熱性を有する受皿上
に、低融点フリツトのガラス層を少なくとも一方
の面に形成した多孔質炭化珪素セラミツク成形板
を空気断熱層を介して載置してなる電子レンジ用
発熱体。[Scope of Claim for Utility Model Registration] A heating element used inside a microwave oven to brown the heated object, which consists of a low-melting-point frit on a saucer that is transparent to microwaves and heat-insulating. A heating element for a microwave oven, in which a porous silicon carbide ceramic molded plate having a glass layer formed on at least one surface is mounted with an air insulation layer interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987141772U JPH0527831Y2 (en) | 1987-09-17 | 1987-09-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987141772U JPH0527831Y2 (en) | 1987-09-17 | 1987-09-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6446994U JPS6446994U (en) | 1989-03-23 |
| JPH0527831Y2 true JPH0527831Y2 (en) | 1993-07-15 |
Family
ID=31407136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987141772U Expired - Lifetime JPH0527831Y2 (en) | 1987-09-17 | 1987-09-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527831Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2561742B2 (en) * | 1990-04-05 | 1996-12-11 | シャープ株式会社 | Heating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336753A (en) * | 1976-09-16 | 1978-04-05 | Matsushita Electric Ind Co Ltd | Vessel which gives burnt mark in high frequency induction heating device |
| JPS5358831A (en) * | 1976-11-09 | 1978-05-27 | Matsushita Electric Ind Co Ltd | High frequency heating apparatus |
| JPS588928A (en) * | 1981-07-08 | 1983-01-19 | Ngk Spark Plug Co Ltd | Heat generating body by absorbing microwave |
-
1987
- 1987-09-17 JP JP1987141772U patent/JPH0527831Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336753A (en) * | 1976-09-16 | 1978-04-05 | Matsushita Electric Ind Co Ltd | Vessel which gives burnt mark in high frequency induction heating device |
| JPS5358831A (en) * | 1976-11-09 | 1978-05-27 | Matsushita Electric Ind Co Ltd | High frequency heating apparatus |
| JPS588928A (en) * | 1981-07-08 | 1983-01-19 | Ngk Spark Plug Co Ltd | Heat generating body by absorbing microwave |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6446994U (en) | 1989-03-23 |
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