JP5359005B2 - Electric rice cooker - Google Patents

Electric rice cooker Download PDF

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JP5359005B2
JP5359005B2 JP2008099913A JP2008099913A JP5359005B2 JP 5359005 B2 JP5359005 B2 JP 5359005B2 JP 2008099913 A JP2008099913 A JP 2008099913A JP 2008099913 A JP2008099913 A JP 2008099913A JP 5359005 B2 JP5359005 B2 JP 5359005B2
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heat insulating
heat
insulating material
inner case
rice cooker
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JP2009247637A (en
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篤 豊島
修平 朝岡
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Tiger Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that conventional electric rice cookers, which have low heat insulation efficiency, make heat apt to escape from inner cases to outside through heat insulations because the conventional rice cookers generally have the heat insulations formed of only glass wool which has air permeability for preventing heat dissipation from the inner cases. <P>SOLUTION: An electric rice cooker has an inner case 14 provided inside an exterior casing 10 of a rice cooker body, an inner pot 15 stored in the inner case and a heat insulator 4 provided on an outer periphery of the inner case, in which the inner pot is heated by an electric heating member 3. The heat insulator 4 has an insulation with a shielding sheet formed by laminating a heat insulation base a having air permeability and the shielding sheet b for shielding air. Thereby, heat in the inner case 14 is prevented from penetrating the heat insulator 4. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本願発明は、炊飯器本体内に収容した内鍋を電気加熱部材で加熱するようにした電気炊飯器に関するものである。   The present invention relates to an electric rice cooker in which an inner pot housed in a rice cooker body is heated by an electric heating member.

電気炊飯器は、外装体と内ケースを有した炊飯器本体の上部に蓋体を載置しているとともに、内ケースの内部に内鍋を出し入れ自在に収容している。又、内ケースの底部には、電気加熱部材（電気ヒータや電磁誘導加熱コイル等）が設けられていて、内ケース内に収容される内鍋を加熱し得るようになっている。   The electric rice cooker has a lid placed on top of a rice cooker main body having an exterior body and an inner case, and an inner pan is put in and out of the inner case so as to be freely inserted and removed. In addition, an electric heating member (an electric heater, an electromagnetic induction heating coil, or the like) is provided at the bottom of the inner case so that the inner pot housed in the inner case can be heated.

ところで、この種の電気炊飯器では、加熱した内鍋からの放熱を防止するために、内ケースの外周に断熱材を配置している場合が多い。尚、電気炊飯器の内ケース外周に断熱材を設置した公知例としては、特開２００１−１７８６２１号公報（特許文献１）に示されるものがある。   By the way, in this kind of electric rice cooker, in order to prevent the heat radiation from the heated inner pot, the heat insulating material is arrange | positioned in the outer periphery of an inner case in many cases. In addition, as a well-known example which installed the heat insulating material in the inner case outer periphery of the electric rice cooker, there exists a thing shown by Unexamined-Japanese-Patent No. 2001-178621 (patent document 1).

従来の電気炊飯器（例えば上記特許文献１のもの）では、上記断熱材として一般にガラスウール製のものが用いられており、該ガラスウール製断熱材を炊飯器本体内における内ケースの外周に巻付けて設置している。   In the conventional electric rice cooker (for example, the thing of the said patent document 1), the thing made from glass wool is generally used as the said heat insulating material, and this glass wool heat insulating material is wound around the outer periphery of the inner case in a rice cooker main body. It is installed.

尚、この種の電気炊飯器では、内ケースの外周面に内鍋を加熱（保温）するための保温ヒータを設置しているものが多いが、断熱材を保温ヒータの外側に巻付けて設置する場合は、該断熱材として耐熱性のあるもの（ガラスウール製）が使用される。   In addition, in this kind of electric rice cooker, there are many things that install a heat insulation heater to heat the inner pot on the outer peripheral surface of the inner case, but heat insulation is wound around the outside of the heat insulation heater. When doing so, the heat insulating material (made of glass wool) is used.

ところで、上記したガラスウール製の断熱材は、ガラスウール繊維を絡ませて所定厚さの１枚物に成形したものであるが、該ガラスウール製断熱材では、各繊維間に微細な隙間があって、そのままでは該繊維間を空気が通過する（通気性がある）性状を有している。   By the way, the above-mentioned heat insulating material made of glass wool is formed by entangling glass wool fibers into a single piece having a predetermined thickness. However, in the heat insulating material made of glass wool, there are fine gaps between the fibers. As it is, air passes through the fibers (has air permeability).

特開２００１−１７８６２１号公報JP 2001-178621 A

ところが、上記の電気炊飯器のように、ガラスウール製断熱材をそのまま内ケースの外周に巻付けたものでは、該ガラスウール製断熱材が通気性を有しているために、内ケース側からの熱気が該断熱材を厚さ方向外側に通過してしまう。従って、ガラスウール製断熱材では、耐熱性はあるものの、内ケースからの熱気が断熱材外方に通過する（外部に逃げてしまう）ので断熱効率が低い（熱損失が大きい）ものであった。   However, in the case where the glass wool heat insulating material is wrapped as it is on the outer periphery of the inner case as in the above electric rice cooker, since the glass wool heat insulating material has air permeability, from the inner case side. Hot air passes through the heat insulating material to the outside in the thickness direction. Therefore, the heat insulating material made of glass wool has heat resistance, but the heat from the inner case passes outside the heat insulating material (it escapes to the outside), so the heat insulating efficiency is low (the heat loss is large). .

そこで、本願発明は、電気炊飯器の内ケース外周に設置される断熱体を改善して、該断熱体による耐熱性と断熱性の両機能を確保できるようにした電気炊飯器を提供することを目的としてなされたものである。   Therefore, the present invention is to provide an electric rice cooker that can improve both the heat resistance and the heat insulating function by improving the heat insulating body installed on the outer periphery of the inner case of the electric rice cooker. It was made as a purpose.

本願発明は、上記従来の問題を解決するための手段として次の構成を有している。尚、本願発明は、電気炊飯器を対象にしている。   The present invention has the following configuration as means for solving the above conventional problems. The present invention is directed to an electric rice cooker.

［本願請求項１の発明］
本願請求項１の発明は、炊飯器本体の外装体内に内ケースを設け、該内ケース内に内鍋を収容し、電気加熱部材で加熱するとともに、上記内ケースの外周に断熱体を設け、該断熱体に、通気性のある断熱基材と通気を遮断する遮断シートとを貼り合わせた遮断シート付き断熱材を内外方向に少なくとも３組重合させたものを使用してなる電気炊飯器であって、上記内外方向３組の遮断シート付き断熱材は、内側のものよりも外側のものが順次厚さが厚くなっているとともに、中間に位置する遮断シート付き断熱材は、上下両端側で上記外装体側および内ケース側の所定の取り付け部材により支持されることによって、それよりも内側および外側の各遮断シート付き断熱材との間に所定の断熱空気層を形成していることを特徴としている。 [Invention of Claim 1 of the Present Application]
The invention of claim 1, the inner case is provided on the exterior body of the cooker body, houses the Uchinabe within inner casing, together with heating in electric heating element, a heat insulating member provided on the outer periphery of the inner casing , on the insulation, an electric rice cooker made using what was at least three sets polymerizing breathable blocking sheet with insulation bonding the insulation substrate and shielding sheet blocks the air in and out direction And, the above-mentioned three sets of heat insulating materials with blocking sheets in the inner and outer directions are sequentially thicker on the outer side than those on the inner side, and the heat insulating materials with blocking sheets located in the middle are A predetermined heat insulating air layer is formed between each of the inner and outer heat insulating materials with a blocking sheet by being supported by the predetermined attachment members on the outer body side and the inner case side. Yes.

本願請求項１の発明の電気炊飯器に使用されている断熱体は、内鍋からの熱が無駄に外部に放出されるのを防止するためのもので、該断熱体は内ケースの外面の全周を囲繞するように設置することが好ましい。 The heat insulator used in the electric rice cooker according to the first aspect of the present invention is for preventing heat from the inner pot from being unnecessarily released to the outside, and the heat insulator is formed on the outer surface of the inner case. It is preferable to install so as to surround the entire circumference.

この断熱体には、通気性のある断熱基材と通気を遮断する遮断シートとを貼り合わせた遮断シート付き断熱材を使用しているが、上記断熱基材としては、例えば所定厚さを有するガラスウール製のものが採用でき、上記遮断シートとしては通気を遮断するものであれば適宜の薄シート（例えば合成樹脂シート）が採用できる。尚、上記断熱基材は、実質的に断熱部となるもので、厚さ方向に通気性を有しているが十分な耐熱性を有したものである。 For this heat insulating body, a heat insulating material with a blocking sheet obtained by bonding a breathable heat insulating base material and a blocking sheet that blocks ventilation is used. The heat insulating base material has , for example, a predetermined thickness. A glass wool product can be used, and an appropriate thin sheet (for example, a synthetic resin sheet) can be used as the blocking sheet as long as the ventilation is blocked. In addition, the said heat insulation base material becomes a heat insulation part substantially, and although it has air permeability in the thickness direction, it has sufficient heat resistance.

内鍋を加熱するための電気加熱部材としては、主加熱手段として電気ヒータや電磁誘導加熱コイルが用いられる。又、内ケースの側部外周面には、副加熱手段として内鍋を保温するための保温ヒータが設けられているものが多い。そして、炊飯時には、同保温ヒータによっても内鍋がかなり高温まで加熱される一方、保温時には、必要な保温温度まで加熱される。 The electrical heating element for heating the inner pot, electric heater motor or an electromagnetic induction heating coil is used as the main heating means. In many cases, the outer peripheral surface of the side part of the inner case is provided with a heat retaining heater for keeping the inner pot warm as a sub-heating means . At the time of cooking, while the inner bowl by the insulation heater is heated considerably to a high temperature, during heat retention, Ru is heated until the necessary insulation temperature.

上記断熱体には、通気性のある断熱基材と通気を遮断する遮断シートとを張り合わせた遮断シート付き断熱材が採用され、例えばその断熱基材（ガラスウール製）が内側で遮断シートが外側に向く状態で内ケース外周に設置される。この場合、ガラスウール製の断熱基材が内ケースの外周面（高温になる）に接触（又は近接）するが、炊飯時又は保温時に内ケースが高温になっても、断熱基材（ガラスウール製）には耐熱性があるので断熱体が熱変形したり熱劣化したりすることがない。 The heat insulation member is employed breathable blocking sheet with insulation by bonding a and blocking sheet which blocks the air insulation substrate, for example, the sheet for protecting external its insulation substrate (glass wool) is on the inside It is installed on the outer periphery of the inner case in a state of facing. In this case, the heat insulating base material made of glass wool comes into contact with (or close to) the outer peripheral surface (high temperature) of the inner case, but the heat insulating base material (glass wool) even when the inner case becomes hot during cooking or heat retention. Manufactured) has heat resistance, so that the heat insulator does not thermally deform or deteriorate.

又、ガラスウール製の断熱基材では、通気性があるので内ケースからの熱が断熱基材中（ガラスウール繊維間の隙間）に浸透するが、該断熱基材の外面に遮断シートが貼設されているので、断熱基材中に浸透した熱がその外面から外部に放出されるのを阻止できる（断熱基材中に蓄熱できる）。   In addition, since the heat insulating base material made of glass wool has air permeability, the heat from the inner case penetrates into the heat insulating base material (the gap between the glass wool fibers), but a blocking sheet is stuck on the outer surface of the heat insulating base material. Since it is provided, it is possible to prevent the heat permeated into the heat insulating base material from being released from the outer surface to the outside (heat can be stored in the heat insulating base material).

他方、ガラスウール製の断熱基材では、水の浸透性が非常に高く、もし外装体側から本体内に水が侵入して該侵入水が断熱基材に接触すると、断熱基材が侵入水を吸収してしまうが、断熱基材の外面に遮断シートを貼設したものでは、該侵入水が該遮断シートで阻止されて断熱基材中に吸収されにくくなる。   On the other hand, in the heat insulating base material made of glass wool, the water permeability is very high, and if the water enters the main body from the exterior body side and the intruding water contacts the heat insulating base material, the heat insulating base material Although it absorbs, the thing which stuck the shielding sheet on the outer surface of the heat insulation base material will become difficult to be absorbed in the heat insulation base material because this intrusion water is blocked | prevented by this shielding sheet.

又、断熱基材（ガラスウール製）の外面に遮断シートを貼設した断熱体では、断熱基材のガラスウール繊維面が遮断シートで被覆されているとともに、該遮断シート被覆面が平滑となっている。従って、断熱基材の遮断シート貼設面からガラスウール繊維屑が分離（飛散）しなくなり、且つ組立時に断熱体の遮断シート貼設面に他の部品が引っ掛かからない。尚、断熱基材の内面側は、ガラスウール繊維が露出したままであるが、該断熱基材の内面は内ケースの外面（又はその外周の保温ヒータの外面）に接触しているので、ガラスウール繊維屑が分離（飛散）しにくい。   Moreover, in the heat insulating body in which the shielding sheet is pasted on the outer surface of the heat insulating base material (made of glass wool), the glass wool fiber surface of the heat insulating base material is covered with the shielding sheet, and the shielding sheet covering surface becomes smooth. ing. Accordingly, the glass wool fiber scraps are not separated (scattered) from the shielding sheet attachment surface of the heat insulating base material, and other parts are not caught on the insulation sheet attachment surface of the heat insulator during assembly. In addition, although the glass wool fiber remains exposed on the inner surface side of the heat insulating substrate, the inner surface of the heat insulating substrate is in contact with the outer surface of the inner case (or the outer surface of the heat retaining heater on the outer periphery thereof). Wool fiber waste is difficult to separate (scatter).

本願請求項１の発明の構成では、そのような構成および作用を有する遮断シート付き断熱材を、さらに内外方向に少なくとも３組重合させたものを使用していることを特徴としている。The structure of the invention of claim 1 of the present application is characterized in that a heat insulating material with a blocking sheet having such a structure and action is further polymerized in at least three sets in the inner and outer directions.

この遮断シート付き断熱材の重合枚数は、複数組重合させることが好ましく、特に少なくとも３組重合させるようにすると、各遮断シート付き断熱材の１枚当たりの厚さを薄くしたもの使用することができ、また厚さの薄い遮断シート付き断熱材を内外方向に重合させるようにすると、同じ厚さ（複数枚の遮断シート付き断熱材の合計の厚さ）の単層体のものよりも断熱機能が大きく向上する。It is preferable to polymerize a plurality of sets of the heat insulating material with a blocking sheet, and particularly when at least three sets are polymerized, it is possible to use a heat insulating material with a blocking sheet having a reduced thickness per sheet. If the thin insulation material with a barrier sheet is polymerized in the inner and outer directions, it can insulate more than a single layer of the same thickness (the total thickness of the heat insulators with multiple barrier sheets) Is greatly improved.

しかも、その場合において、それら３組の遮断シート付き断熱材は、それぞれの厚さを内側のものから外側のものにかけて順次厚くしている。In addition, in that case, the three sets of heat insulating materials with a blocking sheet are made thicker sequentially from the inner one to the outer one.

つまり、一般に保温ヒータが巻成されている内ケース外周面に対して直接巻き付けられるなどして設けられる最内側の断熱材は最も厚さが薄く、例えば保温ヒータの凹凸などに対して柔軟に対応変形して同保温ヒータを隙間なく覆うように取り付けられて、保温ヒータの熱が内ケースに対して確実かつ効果的に伝達されるように構成して外方側と断熱する。In other words, the innermost heat insulating material, which is generally provided by being directly wound around the outer peripheral surface of the inner case around which the heat insulation heater is wound, is the thinnest, for example, it can flexibly cope with the unevenness of the heat insulation heater. The heat insulating heater is deformed and attached so as to cover the heat insulating heater without any gap, and the heat of the heat insulating heater is configured to be surely and effectively transmitted to the inner case to insulate from the outer side.

次に、中間に位置する遮断シート付き断熱材は、内側の遮断シート付き断熱材よりは厚いが外側の遮断シート付き断熱材よりは薄く形成されていて、上下両端側で外装体側および内ケース側の所定の取り付け部材により支持されることによって、内側および外側の遮断シート付き断熱材との間に所定の断熱空気層を形成している。Next, the heat insulating material with the blocking sheet located in the middle is formed thicker than the heat insulating material with the inner blocking sheet, but thinner than the heat insulating material with the outer blocking sheet. A predetermined heat insulating air layer is formed between the inner and outer heat insulating materials with the shielding sheet.

このため、その内外両側に断熱空気層による有効な断熱空間が形成され、同部分には、中間に位置する遮断シート付き断熱材自身の厚みによる断熱部と合わせて内外方向に３重の断熱部を形成することができる。For this reason, an effective heat insulation space is formed on both the inner and outer sides by a heat insulating air layer, and in this portion, a heat insulating portion triple in the inner and outer directions together with the heat insulating portion by the thickness of the heat insulating material with a blocking sheet located in the middle Can be formed.

さらに、設置スペースの自由度も大きい外方の外側遮断シート付き断熱材は、所望に厚さが厚くなるように形成されており、季節に応じて温度が大きく変動する炊飯器本体外方からの外気に対して有効な断熱作用を果たすようになっている。Furthermore, the heat insulating material with an outer outer shielding sheet having a large degree of freedom in installation space is formed so as to increase the thickness as desired, and from the outside of the rice cooker main body where the temperature varies greatly depending on the season. Effective insulation against outside air is achieved.

したがって、このような構成の場合、内ケースと外装体との間には、上記中間の遮断シート付き断熱材による両端側の断熱空気層と合わせて、結局内外方向に５重の断熱部が形成されることになり、極めて断熱機能の高い構造となる。Therefore, in the case of such a configuration, a five-layer heat insulating portion is formed between the inner case and the outer body together with the heat insulating air layers on both ends by the heat insulating material with the intermediate blocking sheet. As a result, the structure has a very high heat insulating function.

［本願請求項２の発明］
本願請求項２の発明は、炊飯器本体の外装体内に内ケースを設け、該内ケース内に内鍋を収容し、電気加熱部材で加熱するとともに、上記内ケースの外周に断熱体を設け、該断熱体に、通気性のある断熱基材と通気を遮断する遮断シートとを貼り合わせた遮断シート付き断熱材を内外方向に少なくとも３組重合させたものを使用し、同内外方向３組の遮断シート付き断熱材の相互間に所定の断熱空気層を設けてなる電気炊飯器であって、上記所定の断熱空気層は、中間に位置する遮断シート付き断熱材を曲成させることにより、上記内外方向３組の遮断シート付き断熱材相互間の上下方向に部分的に画成して設けられていることを特徴としている。 [Invention of claim 2 of the present application]
The invention of claim 2 of the present application provides an inner case in the outer body of the rice cooker body, houses the inner pot in the inner case, heats it with an electric heating member, and provides a heat insulator on the outer periphery of the inner case, A heat insulating material with a shielding sheet obtained by laminating a breathable insulating base material and a shielding sheet that blocks ventilation is used as the heat insulating body, and at least three sets of the inner and outer directions are polymerized. An electric rice cooker in which a predetermined heat insulating air layer is provided between heat insulating materials with a blocking sheet, wherein the predetermined heat insulating air layer is formed by bending a heat insulating material with a blocking sheet located in the middle. It is characterized in that it is partially defined in the vertical direction between three sets of heat insulating materials with blocking sheets in the inner and outer directions .

本願請求項２の発明の電気炊飯器に使用されている断熱体は、内鍋からの熱が無駄に外部に放出されるのを防止するためのもので、該断熱体は内ケースの外面の全周を囲繞するように設置することが好ましい。The heat insulator used in the electric rice cooker of the invention of claim 2 of the present application is for preventing the heat from the inner pot from being discharged to the outside unnecessarily, and the heat insulator is formed on the outer surface of the inner case. It is preferable to install so as to surround the entire circumference.

この断熱体には、通気性のある断熱基材と通気を遮断する遮断シートとを貼り合わせた遮断シート付き断熱材を使用しているが、上記断熱基材としては、例えば所定厚さを有するガラスウール製のものが採用でき、上記遮断シートとしては通気を遮断するものであれば適宜の薄シート（例えば合成樹脂シート）が採用できる。尚、上記断熱基材は、実質的に断熱部となるもので、厚さ方向に通気性を有しているが十分な耐熱性を有したものである。For this heat insulating body, a heat insulating material with a blocking sheet obtained by bonding a breathable heat insulating base material and a blocking sheet that blocks ventilation is used. The heat insulating base material has, for example, a predetermined thickness. A glass wool product can be used, and an appropriate thin sheet (for example, a synthetic resin sheet) can be used as the blocking sheet as long as the ventilation is blocked. In addition, the said heat insulation base material becomes a heat insulation part substantially, and although it has air permeability in the thickness direction, it has sufficient heat resistance.

内鍋を加熱するための電気加熱部材としては、主加熱手段として電気ヒータや電磁誘導加熱コイルが用いられる。又、内ケースの側部外周面には、副加熱手段として内鍋を保温するための保温ヒータが設けられているものが多い。そして、炊飯時には、同保温ヒータによっても内鍋がかなり高温まで加熱される一方、保温時には、必要な保温温度まで加熱される。As an electric heating member for heating the inner pot, an electric heater or an electromagnetic induction heating coil is used as the main heating means. In many cases, the outer peripheral surface of the side part of the inner case is provided with a heat retaining heater for keeping the inner pot warm as a sub-heating means. And during rice cooking, the inner pot is heated to a considerably high temperature also by the heat retaining heater, while at the time of heat retaining, it is heated to a necessary heat retaining temperature.

上記断熱体には、通気性のある断熱基材と通気を遮断する遮断シートとを張り合わせた遮断シート付き断熱材が採用され、例えばその断熱基材（ガラスウール製）が内側で遮断シートが外側に向く状態で内ケース外周に設置される。この場合、ガラスウール製の断熱基材が内ケースの外周面（高温になる）に接触（又は近接）するが、炊飯時又は保温時に内ケースが高温になっても、断熱基材（ガラスウール製）には耐熱性があるので断熱体が熱変形したり熱劣化したりすることがない。For the heat insulator, a heat insulating material with a barrier sheet in which a heat-insulating base material having air permeability and a barrier sheet that blocks ventilation is bonded is used. For example, the heat insulating substrate (made of glass wool) is inside and the barrier sheet is outside. It is installed on the outer periphery of the inner case in a state facing In this case, the heat insulating base material made of glass wool comes into contact with (or close to) the outer peripheral surface (high temperature) of the inner case, but the heat insulating base material (glass wool) even when the inner case becomes hot during cooking or heat retention. Manufactured) has heat resistance, so that the heat insulator does not thermally deform or deteriorate.

又、ガラスウール製の断熱基材では、通気性があるので内ケースからの熱が断熱基材中（ガラスウール繊維間の隙間）に浸透するが、該断熱基材の外面に遮断シートが貼設されているので、断熱基材中に浸透した熱がその外面から外部に放出されるのを阻止できる（断熱基材中に蓄熱できる）。In addition, since the heat insulating base material made of glass wool has air permeability, the heat from the inner case penetrates into the heat insulating base material (the gap between the glass wool fibers), but a blocking sheet is stuck on the outer surface of the heat insulating base material. Since it is provided, it is possible to prevent the heat permeated into the heat insulating base material from being released from the outer surface to the outside (heat can be stored in the heat insulating base material).

他方、ガラスウール製の断熱基材では、水の浸透性が非常に高く、もし外装体側から本体内に水が侵入して該侵入水が断熱基材に接触すると、断熱基材が侵入水を吸収してしまうが、断熱基材の外面に遮断シートを貼設したものでは、該侵入水が該遮断シートで阻止されて断熱基材中に吸収されにくくなる。On the other hand, in the heat insulating base material made of glass wool, the water permeability is very high, and if the water enters the main body from the exterior body side and the intruding water contacts the heat insulating base material, the heat insulating base material Although it absorbs, the thing which stuck the shielding sheet on the outer surface of the heat insulation base material will become difficult to be absorbed in the heat insulation base material because this intrusion water is blocked | prevented by this shielding sheet.

又、断熱基材（ガラスウール製）の外面に遮断シートを貼設した断熱体では、断熱基材のガラスウール繊維面が遮断シートで被覆されているとともに、該遮断シート被覆面が平滑となっている。従って、断熱基材の遮断シート貼設面からガラスウール繊維屑が分離（飛散）しなくなり、且つ組立時に断熱体の遮断シート貼設面に他の部品が引っ掛かからない。尚、断熱基材の内面側は、ガラスウール繊維が露出したままであるが、該断熱基材の内面は内ケースの外面（又はその外周の保温ヒータの外面）に接触しているので、ガラスウール繊維屑が分離（飛散）しにくい。Moreover, in the heat insulating body in which the shielding sheet is pasted on the outer surface of the heat insulating base material (made of glass wool), the glass wool fiber surface of the heat insulating base material is covered with the shielding sheet, and the shielding sheet covering surface becomes smooth. ing. Accordingly, the glass wool fiber scraps are not separated (scattered) from the shielding sheet attachment surface of the heat insulating base material, and other parts are not caught on the insulation sheet attachment surface of the heat insulator during assembly. In addition, although the glass wool fiber remains exposed on the inner surface side of the heat insulating substrate, the inner surface of the heat insulating substrate is in contact with the outer surface of the inner case (or the outer surface of the heat retaining heater on the outer periphery thereof). Wool fiber waste is difficult to separate (scatter).

本願請求項２の発明の構成では、そのような構成および作用を有する遮断シート付き断熱材を、さらに内外方向に少なくとも３組重合させたものを使用している。In the configuration of the invention of claim 2 of the present application, a heat insulating material with a blocking sheet having such a configuration and action is further obtained by polymerizing at least three sets in the inner and outer directions.

この遮断シート付き断熱材の重合枚数は、複数組重合させることが好ましく、特に少なくとも３組重合させるようにすると、各遮断シート付き断熱材の１枚当たりの厚さを薄くしたもの使用することができ、また厚さの薄い遮断シート付き断熱材を内外方向に重合させるようにすると、同じ厚さ（複数枚の遮断シート付き断熱材の合計の厚さ）の単層体のものよりも断熱機能が大きく向上する。It is preferable to polymerize a plurality of sets of the heat insulating material with a blocking sheet, and particularly when at least three sets are polymerized, it is possible to use a heat insulating material with a blocking sheet having a reduced thickness per sheet. If the thin insulation material with a barrier sheet is polymerized in the inner and outer directions, it can insulate more than a single layer of the same thickness (the total thickness of the heat insulators with multiple barrier sheets) Is greatly improved.

そして、本願請求項２の発明の構成の場合、同少なくとも３組の遮断シート付き断熱材相互間、つまり中間に位置する断熱材の両側には所定の断熱空気層を形成している。And in the case of the structure of Claim 2 of this application, the predetermined heat insulation air layer is formed in the both sides of the heat insulating material located in the middle between the said at least 3 sets of heat insulating materials with a blocking sheet.

このような構成によると、中間に位置する断熱材の内外方向両側に所定の断熱空気層による有効な断熱空間が形成され、自身の厚みによる断熱部と合わせて結局内外方向に３重の断熱部を形成することができる。According to such a configuration, an effective heat insulation space by a predetermined heat insulation air layer is formed on both sides in the inner and outer direction of the heat insulating material located in the middle, and finally the heat insulation portion triple in the inner and outer direction together with the heat insulation portion by its own thickness Can be formed.

したがって、このような構成の場合、上記中間の遮断シート付き断熱材による両端側の断熱空気層と合わせて、結局内外方向に５重の断熱部が形成されることになり、極めて断熱機能の高い構造となる。Therefore, in the case of such a configuration, in combination with the heat insulating air layers at both ends by the heat insulating material with the intermediate blocking sheet, a five-layer heat insulating portion is formed in the inner and outer directions, and the heat insulating function is extremely high. It becomes a structure.

しかも、それら少なくとも３組の遮断シート付き断熱材相互の間に設けられている断熱空気層は、内外方向中間部の遮断シート付き断熱部材を曲成させることにより、上下方向に部分的に画成して設けられていることを特徴としている。In addition, the heat insulating air layer provided between the at least three sets of heat insulating materials with the insulating sheet is partially defined in the vertical direction by bending the heat insulating member with the insulating sheet in the middle portion in the inner and outer directions. It is characterized by being provided.

このように中間断熱部材両側の各断熱空気層が上下方向に部分的に画成されていると、外部および相互間の空気の移動、流通がないので、全体が連通している場合に比べて、より断熱機能が向上する。この結果、さらに断熱機能が向上する。In this way, if each heat insulation air layer on both sides of the intermediate heat insulation member is partially defined in the vertical direction, there is no movement and distribution of air between the outside and each other, so compared to the case where the whole communicates The heat insulation function is improved. As a result, the heat insulation function is further improved.

この場合、上記中間に位置する遮断シート付き断熱材は、例えば上下両端側で上記炊飯器本体の外装体側および内ケース側の所定の取り付け部材により支持するようにすれば、曲成状態を容易かつ確実に維持することができ、内側および外側の各遮断シート付き断熱材との間に確実に所定の断熱空気層を実現することができる。In this case, if the insulating material with a blocking sheet located in the middle is supported by predetermined attachment members on the outer body side and the inner case side of the rice cooker body on the upper and lower ends, for example, the bent state can be easily and It can be reliably maintained, and a predetermined heat insulating air layer can be reliably realized between the inner and outer insulating materials with the shielding sheet.

以上の結果、本願請求項１，２の発明によると、それら何れの発明にあっても、内ケース外周部分の断熱性能を大きく向上させることができ、極めて省エネ性能の高い電気炊飯器を提供することが可能となる。As a result, according to the inventions of claims 1 and 2 of the present application, in any of these inventions, the heat insulating performance of the outer peripheral portion of the inner case can be greatly improved, and an electric rice cooker with extremely high energy saving performance is provided. It becomes possible.

以下、図１〜図６を参照して本願発明の参考例および実施形態を説明する。先ず図１〜図４には本願発明の参考例に係る電気炊飯器の構成を示し、図５〜図６には本願発明の実施形態に係る電気炊飯器の構成を示している。 Hereinafter, reference examples and embodiments of the present invention will be described with reference to FIGS . First in FIGS shows the configuration of an electric rice cooker according to a reference example of the present invention, showing a configuration of an electric rice cooker according to the embodiment of the present invention in FIGS. 5-6.

［図１〜図４の参考例の構成］
この電気炊飯器は、例えば図１〜図２に示すように、炊飯器本体１の上部に蓋体２を載置しているとともに、炊飯器本体１の内部に内鍋１５を出し入れ自在に収納している。 [ Configuration of Reference Example in FIGS. 1 to 4]
Electric rice cooker This, for example, as shown in FIGS. 1-2, with which places the lid 2 on the top of the rice cooker main body 1, freely out of the inner bowl 15 in the interior of the rice cooker main body 1 It is stored in.

炊飯器本体１は、外装体１０と内ケース１４とを有している。外装体１０と内ケース１４との間には、各種部材を設置するためのスペースＳが設けられている。   The rice cooker body 1 has an exterior body 10 and an inner case 14. A space S for installing various members is provided between the exterior body 10 and the inner case 14.

外装体１０は、胴部を構成する筒状の外ケース１１と、外ケース１１の下部に取付けた皿状の底部材１２とを有している。この参考例のものでは、外ケース１１の上部に環状の肩部１３が一体に成形されている。そして、底部材１２と外ケース１１とは、底部材外周部の立上げ壁に外ケース下端部を無理嵌めして結合されている。尚、この参考例の電気炊飯器では、外ケース１１（肩部１３を含む）及び底部材１２はそれぞれ合成樹脂製である。 The exterior body 10 includes a cylindrical outer case 11 that constitutes a body portion, and a dish-shaped bottom member 12 attached to a lower portion of the outer case 11. In this reference example, an annular shoulder 13 is integrally formed on the upper portion of the outer case 11. The bottom member 12 and the outer case 11 are joined by forcibly fitting the lower end of the outer case to the rising wall of the outer peripheral portion of the bottom member. In the electric rice cooker of this reference example , the outer case 11 (including the shoulder portion 13) and the bottom member 12 are each made of synthetic resin.

内ケース１４は、この参考例のものでは、金属製で深容器形のものが採用されている。この内ケース１４は、内鍋１５の外径より僅かに大径の側周部１４ａの下部に該側周部１４ａより若干小径で所定小高さの下方突出部１４ｂを有している。そして、この内ケース１４は、底部材１２に複数箇所（例えば４箇所）でビス固定（（図１の符号１６）されている。 In this reference example , the inner case 14 is made of metal and has a deep container shape. The inner case 14 has a downward projecting portion 14b having a slightly smaller diameter and a predetermined small height than the side peripheral portion 14a at a lower portion of the side peripheral portion 14a having a diameter slightly larger than the outer diameter of the inner pot 15. The inner case 14 is screw-fixed to the bottom member 12 at a plurality of locations (for example, four locations) (reference numeral 16 in FIG. 1).

外装体１０と内ケース１４との間の前部側（図２の左側）のスペースには、制御基盤５が設けられている。   A control board 5 is provided in the space on the front side (the left side in FIG. 2) between the exterior body 10 and the inner case 14.

内ケース１４の下方突出部１４ｂ内には、内鍋１５を加熱するための電気加熱部材３が設けられている。この参考例では、電気加熱部材３として熱盤をヒータ線で加熱するようにした電気ヒータ３１が採用されている。尚、電気ヒータ３１の高さ（厚さ）と内ケース１４の下方突出部１４ｂの側壁１４ｃの高さはほぼ同高さであり、該電気ヒータ３１全体が内ケース下方突出部１４ｂ内に収容されている。 An electric heating member 3 for heating the inner pot 15 is provided in the downward projecting portion 14 b of the inner case 14. In this reference example , an electric heater 31 in which a heating plate is heated by a heater wire is employed as the electric heating member 3. The height (thickness) of the electric heater 31 and the height of the side wall 14c of the downward projecting portion 14b of the inner case 14 are substantially the same, and the entire electric heater 31 is accommodated in the inner case downward projecting portion 14b. Has been.

電気ヒータ３１の場合は、リード線接続用の２つの端子３２，３２があるが、この両端子３２，３２は、図２及び図３に示すように内ケース１４の下方突出部１４ｂの側壁１４ｃに設けた挿通穴１４ｄから外方に臨ませている。この両端子３２，３２の外方臨出位置は、炊飯器本体１の前部側であり、該両端子３２，３２と前部側に設置している制御基盤５とを接続し易くしている。尚、以下の説明では、電気ヒータ３１の端子３２を単にヒータ端子ということがある。   In the case of the electric heater 31, there are two terminals 32, 32 for connecting lead wires, and both the terminals 32, 32 are side walls 14 c of the downward projecting portion 14 b of the inner case 14 as shown in FIGS. 2 and 3. It faces from the insertion hole 14d provided in the outside. The outward projecting positions of both terminals 32, 32 are on the front side of the rice cooker body 1, and it is easy to connect the terminals 32, 32 and the control base 5 installed on the front side. Yes. In the following description, the terminal 32 of the electric heater 31 may be simply referred to as a heater terminal.

各ヒータ端子３２，３２には、図２及び図３に示すようにヒータ端子３２部分を露出させた状態でヒータ端子の付け根部分に被せるためのキャップ３３，３３が取付けられる。   As shown in FIGS. 2 and 3, caps 33 and 33 are attached to the heater terminals 32 and 32 so as to cover the base portions of the heater terminals with the heater terminal 32 portions exposed.

内ケース１４の側周部１４ａの外面には、保温ヒータ３５が取付けられている。この保温ヒータ３５は、内ケース側周部１４ａの外面の全周に巻付けてられていて、該保温ヒータ３５からの熱で内ケース側周部１４ａを介して内鍋１５を加熱（保温）し得るようになっている。   A heat retaining heater 35 is attached to the outer surface of the side peripheral portion 14 a of the inner case 14. The heat retaining heater 35 is wound around the entire outer periphery of the inner case side peripheral portion 14a, and heats the inner pot 15 via the inner case side peripheral portion 14a with heat from the heat retaining heater 35 (heat retention). It has come to be able to do.

内鍋１５は、内ケース１４内に出し入れ自在に収納される。この参考例では、内鍋１５として金属製のものが採用されている。 The inner pot 15 is housed in the inner case 14 so as to be freely put in and out. In this reference example , the inner pan 15 is made of metal.

内ケース１４の底部中央には、内鍋１５の温度を検出する温度センサー１７が設けられている。   A temperature sensor 17 for detecting the temperature of the inner pot 15 is provided at the bottom center of the inner case 14.

蓋体２は、外蓋２１と、該外蓋２１の下面において内鍋１５の開口縁を開閉する内蓋２２とを有している。外蓋２１には、蒸気抜き通路２３が形成されている。   The lid 2 has an outer lid 21 and an inner lid 22 that opens and closes the opening edge of the inner pot 15 on the lower surface of the outer lid 21. A steam vent passage 23 is formed in the outer lid 21.

そして、この蓋体２は、炊飯器本体１の後側上部においてヒンジユニット８（図２）で枢支されていて、前部側が弧回動開閉されるようになっている。   And this cover 2 is pivotally supported by the hinge unit 8 (FIG. 2) in the rear upper part of the rice cooker main body 1, and the front side is made to open and close by arc rotation.

尚、図１及び図２において符号９は把手であり、該把手９は左右の軸部９ａ，９ａ（図１）を中心にして上下に弧回動させ得るようになっている。   In FIG. 1 and FIG. 2, reference numeral 9 denotes a handle, which can be turned up and down around the left and right shaft portions 9a, 9a (FIG. 1).

外装体１０と内ケース１４との間のスペースＳ内には、断熱体４が設置されている。この参考例では、断熱体４として、内ケース１４の側周部１４ａの外面に巻付けて設置された内側断熱材４１と該内側断熱材４１の外面に配置された外側断熱材４２との内外２重のものを採用している。 In the space S between the exterior body 10 and the inner case 14, the heat insulator 4 is installed. In this reference example , the inner and outer sides of the inner heat insulating material 41 installed around the outer surface of the side peripheral portion 14 a of the inner case 14 and the outer heat insulating material 42 arranged on the outer surface of the inner heat insulating material 41 as the heat insulating body 4. A double one is used.

この内外各断熱材４１，４２は、図４に拡大図示するように、それぞれ通気性を有した断熱基材ａと通気を遮断する遮断シートｂとを貼り合わせた遮断シート付き断熱材が採用されている。   As shown in an enlarged view in FIG. 4, the inner and outer heat insulating materials 41 and 42 are each made of a heat insulating material with a blocking sheet obtained by bonding a heat insulating base material a having air permeability and a blocking sheet b blocking air flow. ing.

各断熱基材ａ，ａは、実質的な断熱部として機能するもので、それぞれガラスウール製である。この各断熱基材ａ，ａは、ガラスウール繊維を絡ませて所定厚さ（図示例のものでは厚さが１０〜１２mm程度）に成形したもので、耐熱性を有しているとともに各繊維間に隙間があるので通気性を有している。   Each heat insulation base material a and a function as a substantial heat insulation part, and are each made of glass wool. Each of the heat insulating base materials a and a is formed by entangling glass wool fibers to a predetermined thickness (in the illustrated example, the thickness is about 10 to 12 mm), and has heat resistance and between the fibers. Since there is a gap, it has air permeability.

各遮断シートｂ，ｂは、それぞれ合成樹脂製（例えばポリエチレンテレフタート製）の薄シートが採用されていて、通気を遮断し得るものである。   Each of the blocking sheets b and b is made of a synthetic resin (for example, polyethylene terephthalate) thin sheet, and can block ventilation.

そして、この内外の各遮断シート付き断熱材４１，４２は、それぞれ断熱基材ａの外面全面に遮断シートｂを貼設して形成されている。   Each of the inner and outer heat insulating materials 41 and 42 with the shielding sheet is formed by pasting the shielding sheet b on the entire outer surface of the heat insulating base material a.

内側断熱材（遮断シート付き断熱材）４１は、外装体１０の肩部１３の直下近傍位置から底部材１２の底部上面に達する高さを有し、内ケース１４の側周部１４ａの外面全周に巻付けて設置されている。外側断熱材（遮断シート付き断熱材）４２は、内側断熱材４１よりやや短い高さで、該内側断熱材４１の外面の約３／４周の範囲（図３参照）に巻付けて設置されている。尚、この外側断熱材４２は、その周方向の開放部（周方向の１／４部分）が炊飯器本体１の前部側に向くように設置されている。そして、内側断熱材４１と外側断熱材４２とは、その各上面高さを同じに揃えた状態で設置されており、従って外側断熱材４２の下面高さが内側断熱材４１の下面高さよりやや高くなっている。   The inner heat insulating material (heat insulating material with a blocking sheet) 41 has a height that reaches the bottom upper surface of the bottom member 12 from a position immediately below the shoulder 13 of the exterior body 10, and the entire outer surface of the side peripheral portion 14 a of the inner case 14. It is installed around the circumference. The outer heat insulating material (heat insulating material with a blocking sheet) 42 has a height slightly shorter than the inner heat insulating material 41 and is wound around a range of about 3/4 of the outer surface of the inner heat insulating material 41 (see FIG. 3). ing. In addition, this outer side heat insulating material 42 is installed so that the opening part (1/4 part of the circumferential direction) of the circumferential direction may face the front part side of the rice cooker main body 1. FIG. And the inner side heat insulating material 41 and the outer side heat insulating material 42 are installed in the state in which each upper surface height was arrange | equalized equally, Therefore Therefore, the lower surface height of the outer side heat insulating material 42 is a little lower than the lower surface height of the inner side heat insulating material 41. It is high.

内側断熱材４１の前部側下端位置には、図２及び図３に示すように両ヒータ端子３２，３２を外方に臨ませるための切欠（開口部）４１ａが形成されている。   As shown in FIGS. 2 and 3, a notch (opening) 41 a for facing both heater terminals 32 and 32 outward is formed at the lower end position on the front side of the inner heat insulating material 41.

又、この参考例の電気炊飯器では、電気ヒータ３１の設置高さ位置で内ケース下方突出部１４ｂの側壁１４ｃと内側断熱材４１との間に別の下部断熱材４３が設置されている。この下部断熱材４３は、内ケース下方突出部１４ｂの側壁１４ｃ外面と内側断熱材４１の内面間の間隔とほぼ同厚さで高さの低い筒状のものが採用されている。又、この下部断熱材４３は、図４に拡大図示するように、上記内側断熱材４１（又は外側断熱材４２）と同様にガラスウール製（通気性がある）の断熱基材ａの外面に合成樹脂シート製（通気を遮断する）の遮断シートｂを貼設したものが使用されている。 Moreover, in the electric rice cooker of this reference example , another lower heat insulating material 43 is installed between the side wall 14c of the inner case lower protrusion 14b and the inner heat insulating material 41 at the installation height position of the electric heater 31. As the lower heat insulating material 43, a cylindrical material having a low height and substantially the same thickness as the distance between the outer surface of the side wall 14c of the inner case lower protrusion 14b and the inner surface of the inner heat insulating material 41 is employed. Further, as shown in an enlarged view in FIG. 4, the lower heat insulating material 43 is formed on the outer surface of the heat insulating base material a made of glass wool (which has air permeability) in the same manner as the inner heat insulating material 41 (or the outer heat insulating material 42). A sheet in which a blocking sheet b made of a synthetic resin sheet (blocking ventilation) is used is used.

この下部断熱材４３は、内ケース下方突出部１４ｂの側壁１４ｃ全周を囲繞する状態で設置されている関係で、上記各ヒータ端子３２，３２を下部断熱材４３の外面まで突出させるための工夫が必要であるが、この参考例のものでは、図３に示すように下部断熱材４３における各ヒータ端子３２，３２が対応する位置に上面側から所定深さに達する切り込み（スリット）４４，４４を設けている。この各スリット４４，４４部分は、下部断熱材４３が軟質（ガラスウール製）であるので容易に開く（広げる）ことができる。そして、組付時に、各スリット４４，４４部分を各ヒータ端子３２，３２の付け根部分に対応させた状態で下部断熱材４３を上方に押込むことにより、各ヒータ端子３２，３２をそれぞれスリット４４，４４内に挿入させることができるようになっている。 The lower heat insulating material 43 is installed so as to surround the entire circumference of the side wall 14c of the inner case downward projecting portion 14b, so that the heater terminals 32 and 32 protrude to the outer surface of the lower heat insulating material 43. However, in this reference example , as shown in FIG. 3, notches (slits) 44, 44 that reach a predetermined depth from the upper surface side to the positions where the heater terminals 32, 32 in the lower heat insulating material 43 correspond to each other. Is provided. The slits 44 and 44 can be easily opened (expanded) because the lower heat insulating material 43 is soft (made of glass wool). Then, at the time of assembly, the lower heat insulating material 43 is pushed upward with the slits 44 and 44 corresponding to the base portions of the heater terminals 32 and 32, so that the heater terminals 32 and 32 are respectively slit 44. , 44 can be inserted.

下部断熱材４３の外面には、図２及び図３に示すようにスリット４４，４４の形成部分に薄肉部４５を形成している。この薄肉部４５は、下部断熱材４３の下端からヒータ端子３２の突出位置を若干越える高さの範囲で形成されている。尚、この薄肉部４５の外面にも上記遮断シートｂが貼設されている。   On the outer surface of the lower heat insulating material 43, as shown in FIG. 2 and FIG. The thin portion 45 is formed in a range of a height slightly exceeding the protruding position of the heater terminal 32 from the lower end of the lower heat insulating material 43. The blocking sheet b is also affixed to the outer surface of the thin portion 45.

この薄肉部４５の外面には、板状の絶縁部材３４があてがわれる。この絶縁部材３４の高さ幅は薄肉部４５の高さとほぼ同じである。この絶縁部材３４には、図３に示すように各ヒータ端子３２，３２の付け根部分を嵌入させるための切欠３４ａ，３４ａが形成されている。この各切欠３４ａ，３４ａは、ヒータ端子３２のキャップ３３の外径よりやや狭い幅で、絶縁部材３４の上縁から所定深さに達する凹状に形成されている。   A plate-like insulating member 34 is applied to the outer surface of the thin portion 45. The height width of the insulating member 34 is substantially the same as the height of the thin portion 45. As shown in FIG. 3, the insulating member 34 is formed with notches 34 a and 34 a for fitting the base portions of the heater terminals 32 and 32. Each of the notches 34a and 34a has a width slightly narrower than the outer diameter of the cap 33 of the heater terminal 32, and is formed in a concave shape reaching a predetermined depth from the upper edge of the insulating member 34.

そして、この絶縁部材３４は、次のようにして組付けられる。尚、絶縁部材３４の組付け前には、図３に示すように各ヒータ端子３２，３２から各キャップ３３，３３を取り外しておく。   The insulating member 34 is assembled as follows. Prior to assembling the insulating member 34, the caps 33 and 33 are removed from the heater terminals 32 and 32 as shown in FIG.

絶縁部材３４の組付けに際しては、炊飯器本体１側において底部材１２以外の各部材を組付けた状態で行う。即ち、下部断熱材４３を内ケース下方突出部１４ｂの側壁１４ｃの外周に組付けた後（各ヒータ端子３２，３２がそれぞれスリット４４，４４部分から薄肉部４５の外方に突出している）、絶縁部材３４の各切欠３４ａ，３４ａをそれぞれヒータ端子３２，３２の直下に対応させた状態で該絶縁部材３４を薄肉部４５の外面に沿わせて上方移動させることにより、各切欠３４ａ，３４ａが各ヒータ端子３２，３２の付け根部分に嵌合する。その後、各ヒータ端子３２，３２にそれぞれキャップ３３，３３を被せることにより、絶縁部材３４を各キャップ３３，３３と薄肉部４５の前面との間で挟持させることができる。   When assembling the insulating member 34, each member other than the bottom member 12 is assembled on the rice cooker body 1 side. That is, after assembling the lower heat insulating material 43 on the outer periphery of the side wall 14c of the inner case lower protrusion 14b (each heater terminal 32, 32 protrudes outward from the thin portion 45 from the slit 44, 44 portion). By moving the insulating member 34 upward along the outer surface of the thin portion 45 in a state where the notches 34a, 34a of the insulating member 34 correspond to directly below the heater terminals 32, 32, the notches 34a, 34a are moved. The heater terminals 32 and 32 are fitted to the base portions. Thereafter, the insulating members 34 can be sandwiched between the caps 33 and 33 and the front surface of the thin portion 45 by covering the heater terminals 32 and 32 with the caps 33 and 33, respectively.

その後、外ケース１１の下端に底部材１２を組付けると炊飯器本体１の組立が完成するが、底部材１２の組付状態では、図２に示すように絶縁部材３４の下端が底部材１２の上面に接触し、且つ絶縁部材３４の各切欠３４ａ，３４ａの底部が各ヒータ端子３２，３２の付け根部分に当接し（絶縁部材３４が上動できない）、しかも絶縁部材３４の前面が各キャップ３３，３３で押えられているので、該絶縁部材３４は安定状態で組付けられている。   Thereafter, when the bottom member 12 is assembled to the lower end of the outer case 11, the assembly of the rice cooker body 1 is completed. In the assembled state of the bottom member 12, the lower end of the insulating member 34 is the bottom member 12 as shown in FIG. The bottoms of the notches 34a and 34a of the insulating member 34 abut the base portions of the heater terminals 32 and 32 (the insulating member 34 cannot move up), and the front surface of the insulating member 34 has caps. 33 and 33, the insulating member 34 is assembled in a stable state.

尚、この参考例では、断熱体４として内側断熱材４１と外側断熱材４２の２重に重合させたものを採用しているが、他の例では、該断熱体４は、単層のものでもよい。又、さらに他の例では、下部断熱材４３を省略したものでもよい。 In this reference example , a double polymerized material of the inner heat insulating material 41 and the outer heat insulating material 42 is used as the heat insulating body 4, but in another example , the heat insulating body 4 is a single layer. But you can. In still another example , the lower heat insulating material 43 may be omitted.

次に、図１〜図４に示す電気炊飯器の作用について説明する。 Next, the operation of the shown to electric rice cooker in FIGS.

この電気炊飯器では、断熱体４として内側断熱材４１と外側断熱材４２を２重に重合させたものを使用しているが、この内側断熱材４１と外側断熱材４２は、それぞれガラスウール製（通気性がある）の断熱基材ａの外面に通気を遮断する遮断シートｂを貼設した遮断シート付き断熱材である。そして、内側断熱材４１と外側断熱材４２とは、断熱基材ａが内側で遮断シートｂが外側に向く状態で設置されている。 In this electric rice cooker, a double polymerized inner heat insulating material 41 and outer heat insulating material 42 are used as the heat insulating body 4, and the inner heat insulating material 41 and the outer heat insulating material 42 are each made of glass wool. It is a heat insulating material with a blocking sheet in which a blocking sheet b for blocking ventilation is pasted on the outer surface of the heat insulating base material a (which has air permeability). And the inner side heat insulating material 41 and the outer side heat insulating material 42 are installed in the state in which the heat insulation base material a is inside, and the interruption | blocking sheet | seat b faces outside.

ところで、炊飯時又は保温時には、電気ヒータ３１や保温ヒータ３５により内ケース１４が間接的又は直接的に加熱されて高温になるが、該内ケース１４外周には内側断熱材４１の断熱基材ａ（ガラスウール製で耐熱性が高い）が接触しているので、断熱体４（特に内側断熱材４１）に熱変形や熱劣化等の悪影響は起きない。   By the way, at the time of rice cooking or heat retention, the inner case 14 is heated indirectly or directly by the electric heater 31 or the heat retaining heater 35 and becomes a high temperature. Since they are in contact with each other (made of glass wool and have high heat resistance), there is no adverse effect such as thermal deformation or thermal deterioration on the heat insulating body 4 (particularly the inner heat insulating material 41).

又、内外各断熱材４１，４２の内面側がガラスウール製の断熱基材ａであると、該断熱基材部分に通気性があるので内ケース１４からの熱が断熱基材（特に内側断熱材４１の断熱基材ａ）中に浸透するが、該断熱基材ａの外面に遮断シートｂが貼設されているので、断熱基材中に浸透した熱がその外面から外部に放出されるのを阻止できる（断熱基材中に蓄熱できる）。従って、単にガラスウールのみの断熱材を使用したものより断熱効果が格段に良好となる（熱損失が少なくなる）。   Further, if the inner surface side of each of the inner and outer heat insulating materials 41 and 42 is a heat insulating base material a made of glass wool, the heat insulating base material portion has air permeability, so that the heat from the inner case 14 is heated by the heat insulating base material (particularly the inner heat insulating material). 41 penetrates into the heat insulating base material a), but since the shielding sheet b is stuck on the outer surface of the heat insulating base material a, the heat permeated into the heat insulating base material is released from the outer surface to the outside. (Heat can be stored in the heat insulating base material). Therefore, the heat insulation effect is remarkably better than that using a heat insulating material only of glass wool (heat loss is reduced).

又、断熱基材ａの外面に遮断シートｂを貼設した内外各断熱材（遮断シート付き断熱材）４１，４２では、外面側の遮断シートｂが防水機能を発揮するので、もし外装体１０内に水が侵入したときでも該侵入水が断熱基材ａに吸収されるのを防止できる。   Further, in each of the inner and outer heat insulating materials (heat insulating material with a blocking sheet) 41 and 42 in which the blocking sheet b is pasted on the outer surface of the heat insulating base material a, the outer blocking sheet b exhibits a waterproof function. Even when water enters the inside, it is possible to prevent the intruding water from being absorbed by the heat insulating base material a.

又、この内外各断熱材（遮断シート付き断熱材）４１，４２では、断熱基材外面側のガラスウール繊維面が遮断シートｂで被覆されているので、断熱基材ａの遮断シート貼設面からガラスウール繊維屑が分離（飛散）しない。   Further, in each of the inner and outer heat insulating materials (heat insulating materials with a blocking sheet) 41, 42, the glass wool fiber surface on the outer surface of the heat insulating substrate is covered with the blocking sheet b. Glass wool fiber waste does not separate from (scatter).

又、断熱基材ａの外面に遮断シートｂを貼設した遮断シート付き断熱材４１，４２では、各断熱材４の外面が平滑面となるので、組立時に断熱材外面（遮断シート）に他の部品類が引っ掛かりにくくなり、組立作業性が良好になる。   Moreover, in the heat insulating materials 41 and 42 with the shielding sheet in which the shielding sheet b is pasted on the outer surface of the heat insulating base material a, the outer surface of each heat insulating material 4 becomes a smooth surface. These parts are less likely to be caught and the assembly workability is improved.

又、断熱体４として内外２重の遮断シート付き断熱材４１，４２を重合させたものを使用すると、同じ厚さの単層のものより断熱機能が向上する。   Moreover, when the thing which superposed | polymerized the heat insulating materials 41 and 42 with a double sheet | seat as the heat insulation body 4 is used, a heat insulation function will improve rather than the thing of the single layer of the same thickness.

又、内側断熱材４１と内ケース下方突出部１４ｂ（電気ヒータ３１が収容されている）の側壁１４ｃとの間に別の下部断熱材４３を設置すると、該下部断熱材４３により電気ヒータ３１の外周部分（内ケース下方突出部１４ｂの側壁１４ｃ部分）からの放熱も遮断できる。   Further, when another lower heat insulating material 43 is installed between the inner heat insulating material 41 and the side wall 14c of the inner case downward projecting portion 14b (the electric heater 31 is accommodated), the lower heat insulating material 43 causes the electric heater 31 to Heat radiation from the outer peripheral portion (the side wall 14c portion of the inner case downward projecting portion 14b) can also be blocked.

又、ヒータ端子３２，３２を下部断熱材４３の外側面より外方に突出させたものにおいて、ヒータ端子３２，３２と下部断熱材４３の外面との間に絶縁部材３４を設置していると、もし外装体１０内に水が侵入して下部断熱材４３の断熱基材ａが水を吸収しても、絶縁部材３４によりその吸収水が各ヒータ端子３２，３２に接触するのを阻止でき、各ヒータ端子３２，３２間が短絡するのを防止できる。   Further, in the case where the heater terminals 32, 32 are projected outward from the outer surface of the lower heat insulating material 43, the insulating member 34 is installed between the heater terminals 32, 32 and the outer surface of the lower heat insulating material 43. Even if water enters the exterior body 10 and the heat insulating base material a of the lower heat insulating material 43 absorbs water, the insulating member 34 can prevent the absorbed water from contacting the heater terminals 32 and 32. It is possible to prevent a short circuit between the heater terminals 32 and 32.

［図５〜図６の本願発明の実施形態の構成］
この本願発明の実施形態の電気炊飯器は、いわゆるＩＨ炊飯器と称されるもので、電気加熱部材３として電磁誘導加熱コイル（ワークコイル）３６，３７を使用している。又、この本願発明の実施形態の電気炊飯器も、上記参考例と同様に、外装体１０内に内ケース１４を収容した炊飯器本体１の上部に蓋体２を弧回動開閉自在に載置している。 [ Configuration of the Embodiment of the Invention of FIGS. 5 to 6]
The electric rice cooker according to the embodiment of the present invention is a so-called IH rice cooker, and uses electromagnetic induction heating coils (work coils) 36 and 37 as the electric heating member 3. Further, the electric rice cooker according to the embodiment of the present invention is also mounted on the upper part of the rice cooker main body 1 in which the inner case 14 is accommodated in the exterior body 10 so as to freely open and close the arc. It is location.

外装体１０は、金属製の外ケース１１の下部に合成樹脂製の底部材１２を組付ける一方、該外ケース１１の上部に合成樹脂製の肩部材１３を組付けて構成されている。   The exterior body 10 is configured by assembling a synthetic resin bottom member 12 to the lower part of a metal outer case 11 and a synthetic resin shoulder member 13 to the upper part of the outer case 11.

内ケース１４は、合成樹脂製で皿状の底材１４Ａの上部に金属製で筒状の側壁１４Ｂを組付けたものが採用されている。筒状の側壁１４Ｂの外周面には、保温ヒータ３５が設置されている。   The inner case 14 is made of a synthetic resin and has a plate-like bottom 14 </ b> A with a metal-made cylindrical side wall 14 </ b> B attached to the upper part. A heat retaining heater 35 is installed on the outer peripheral surface of the cylindrical side wall 14B.

電気加熱部材３となるワークコイルは、内鍋１５の底面を加熱する内側ワークコイル３６と内鍋１５の底隅の湾曲部を加熱する外側ワークコイル３７との内外２組使用されている。   The work coil serving as the electric heating member 3 is used in two sets, the inner work coil 36 for heating the bottom surface of the inner pot 15 and the outer work coil 37 for heating the curved portion at the bottom corner of the inner pot 15.

内鍋１５には、例えばセラミック製のもの（いわゆる土鍋）が使用されている。内鍋１５に非金属製のもの（土鍋）を使用する場合は、該内鍋１５の外面における上記各ワークコイル３６．３７に対面する位置に、それぞれ誘導発熱体（例えば銀ペースト）１８Ａ，１８Ｂを貼設（又は塗布）しておく。尚、内鍋１５として、各ワークコイル３１，３２から電磁誘導加熱が可能な金属製のものを採用した場合には、各誘導発熱体１８Ａ，１８Ｂは不要となる。 For the inner pot 15, for example, a ceramic one (so-called clay pot) is used. When a non-metallic one (earthen pot) is used for the inner pot 15, induction heating elements (for example, silver paste) 18A, 18B are respectively provided at positions facing the work coils 36.37 on the outer surface of the inner pot 15. Is attached (or applied). In addition, when the metal pan which can perform electromagnetic induction heating from each work coil 31 and 32 is employ | adopted as the inner pot 15, each induction heating element 18A and 18B become unnecessary.

尚、図５〜図６において、符号７はワークコイル冷却用のファン、１９は底側の誘導発熱体１８Ａからの熱を遮断する遮熱板１９である。又、図５〜図６において、上記参考例の各図の符号と同じ符号のものは、同参考例の当該部位と同じものである。 5 to 6, reference numeral 7 denotes a work coil cooling fan, and 19 denotes a heat shield 19 that blocks heat from the induction heating element 18A on the bottom side. Further, in FIGS. 5-6, the same reference numerals as those numerals in the figures of the reference example is the same as with the site of the reference example.

この実施形態の電気炊飯器にも、外装体１０と内ケース１４との間のスペースＳ内に断熱体４を設けているが、この実施形態の場合は、該断熱体４として内ケース１４の側壁１４Ｂの外周に内外３重の断熱材４６〜４８を巻付けたものを採用している。即ち、この実施形態の断熱体４は、内側断熱材４６と中間断熱材４７と外側断熱材４８とを３重に巻付けて構成されている。 Also electric cooker implementation form of this, is provided with the thermal insulator 4 in the space S between the inner casing 14 and the outer body 10, in the case of implementation form of this, the heat insulating member 4 A structure in which inner and outer triple heat insulating materials 46 to 48 are wound around the outer periphery of the side wall 14B of the inner case 14 is employed. That is, the heat insulating member 4 of the implementation form of this is constituted by winding an inner heat insulating material 46 and the intermediate heat insulating material 47 and the outer heat insulating member 48 in triplicate.

この３重の各断熱材４６〜４８は、上記参考例の内側断熱材４１（又は外側断熱材４２）と同様に、ガラスウール製（通気性がある）の断熱基材ａの外面に通気を遮断する遮断シートｂを貼着させた遮断シート付き断熱材である。従って、この各断熱材４６〜４８でも、断熱基材ａ部分は耐熱性がある一方で通気性を有しており、遮断シートｂ部分は通気を遮断する機能を有している。 Each of the triple heat insulating materials 46 to 48 vents the outer surface of the heat insulating base material a made of glass wool (which has air permeability) in the same manner as the inner heat insulating material 41 (or the outer heat insulating material 42) of the reference example. It is the heat insulating material with the interruption | blocking sheet which stuck the interruption | blocking sheet | seat b to interrupt | block. Accordingly, even in each of the heat insulating materials 46 to 48, the heat insulating base material a portion has heat resistance while having air permeability, and the blocking sheet b portion has a function of blocking air flow.

ここで、内側断熱材４６は３mm程度の厚さで、中間断熱材４７は５mm程度の厚さで、外側断熱材４８は１０mm程度の厚さである。つまり、内外方向３組の遮断シート付き断熱材４６，４７，４８は、内側のものよりも外側のものが順次厚さが厚くなっている。そして、内側断熱材４６は、内ケース１４の側壁１４Ｂ外周の保温ヒータ３５を囲繞するように設置されており、中間断熱材４７及び外側断熱材４８は、順次内側断熱材４６の外側全周に巻付けて設置している。 Here, the inner heat insulating material 46 is about 3 mm thick, the intermediate heat insulating material 47 is about 5 mm thick, and the outer heat insulating material 48 is about 10 mm thick. In other words, the three outer and inner heat insulating materials 46, 47, and 48 in the outer and outer directions are successively thicker on the outer side than on the inner side. And the inner side heat insulating material 46 is installed so that the heat insulation heater 35 of the side wall 14B outer periphery of the inner case 14 may be surrounded, and the intermediate | middle heat insulating material 47 and the outer side heat insulating material 48 are sequentially arranged on the outer periphery of the inner side heat insulating material 46 sequentially. Wrapped and installed.

又、内側断熱材４６と中間断熱材４７間、及び中間断熱材４７と外側断熱材４８間には、それぞれ空気層Ｍ，Ｍ，Ｎを設けている。即ち、中間断熱材４７の上下方向中央部は上記内側断熱材４６の外周に重合されているが、上端部側及び下端部側は、それぞれ炊飯器本体の肩部１３側下部に設けられた取付支持部材であるスペーサー４９Ａ，内ケース１４の皿状の底部材１４Ａの上端側に設けられたスペーサー４９Ｂによって上下両端部が外方向に屈曲（曲成）されており、該中間断熱材４７の上部側及び下部側と内側断熱材４６間にそれぞれ部分的に画成された空気層Ｍ，Ｍを設けているとともに、中間断熱材４７の上下方向中間部分と外側断熱材４８との間にも部分的に外部と画成された空気層Ｎを設けている。 Air layers M, M, and N are provided between the inner heat insulating material 46 and the intermediate heat insulating material 47 and between the intermediate heat insulating material 47 and the outer heat insulating material 48, respectively. That is, the vertical direction central portion of the intermediate heat insulating material 47 has been polymerized on the outer circumference of the inner heat insulating material 46, the upper end side and lower end side are respectively provided on the shoulder portion 13 side lower portion of the cooker body The upper and lower ends are bent outward (bent) by a spacer 49A, which is a mounting support member, and a spacer 49B provided on the upper end side of the dish-shaped bottom member 14A of the inner case 14, and the intermediate heat insulating material 47 Air layers M, M each partially defined between the upper and lower sides of the inner heat insulating material 46 and the inner heat insulating material 46, and between the middle portion of the intermediate heat insulating material 47 in the vertical direction and the outer heat insulating material 48. Is also provided with an air layer N partially defined from the outside .

尚、この実施形態では、電気加熱部材３として電磁誘導加熱コイル（ワークコイル）３６，３７を使用しているが、このワークコイル３６，３７は高温に弱く、炊飯時にはワークコイル設置部分をファン７による風で冷却する必要がある関係で、この実施形態では上記参考例で使用している下部断熱材４３は設けない。 In the implementation form of this, the use of the electromagnetic induction heating coil (workcoils) 37 as an electric heating element 3, the work coil 36, 37 is weak in high temperature, the work coil arrangement portion at the time of cooking In this embodiment, the lower heat insulating material 43 used in the above-described reference example is not provided because it is necessary to cool with wind from the fan 7.

この実施形態の電気炊飯器でも、断熱体４となる各断熱材４６〜４８には遮断シート付き断熱材を使用しているので、上記参考例の当該機能を有しているとともに、この実施形態では、さらに各断熱材４６〜４８間に断熱空気層Ｍ，Ｍ，Ｎを設けていることにより、断熱効率がさらに一層良好になるという機能を有している。 Be an electric cooker implementation form of this, since each heat insulator 46 to 48 comprising a heat insulating member 4 using shielding sheet with heat insulating material, with has the function of the reference example, this the implementation form of further has a heat insulating air layer M between the heat insulating material 46 to 48, M, by providing the N, the function of thermal insulation efficiency becomes more better.

以上のように、断熱体としての遮断シート付き断熱材の重合枚数は、複数組重合させることが好ましく、特に少なくとも３組重合させるようにすると、各遮断シート付き断熱材の１枚当たりの厚さを薄くしたもの使用することができ、また厚さの薄い遮断シート付き断熱材４６，４７，４８を内外方向に重合させるようにすると、同じ厚さ（複数枚の遮断シート付き断熱材４６，４７，４８の合計の厚さ）の単層体のものよりも断熱機能が大きく向上する。 As described above, it is preferable to superpose a plurality of sets of heat insulating materials with a blocking sheet as a heat insulator, and particularly when at least three sets are polymerized, the thickness of each heat insulating material with a blocking sheet per sheet. can be used thinned ones, also when a thin shielding sheet with the heat insulating material 46, 47, 48 thicknesses to be polymerized in and out direction, the same thickness (plurality of barrier sheet can meet many heat insulating material 46, The heat insulation function is greatly improved as compared with a single layer body having a total thickness of 47 and 48).

しかも、その場合において、それら３組の遮断シート付き断熱材４６，４７，４８は、それぞれの厚さを内側のものから外側のものにかけて順次厚くしている。In addition, in that case, the three sets of heat insulating materials 46, 47, and 48 with the shielding sheet are gradually increased in thickness from the inner side to the outer side.

つまり、保温ヒータ３５が巻成されている内ケース１４の外周面に対して直接巻き付けられるなどして設けられる最内側の断熱材４６は最も厚さが薄く、例えば保温ヒータ３５の凹凸などに対して柔軟に対応変形して同保温ヒータ３５を隙間なく覆うように取り付けられて、保温ヒータ３５の熱が内ケース１４に対して確実かつ効果的に伝達されるように構成して外方側と断熱する。That is, the innermost heat insulating material 46 provided by being directly wound around the outer peripheral surface of the inner case 14 around which the heat retaining heater 35 is wound is thinnest. The heat insulation heater 35 is attached so as to be flexibly deformed so as to cover the heat insulation heater 35 without a gap, and the heat of the heat insulation heater 35 is transmitted to the inner case 14 surely and effectively. Insulate.

次に、中間に位置する遮断シート付き断熱材４７は、上記内側の遮断シート付き断熱材４６よりは厚いが外側の遮断シート付き断熱材４８よりは薄く形成されていて、上下両端側で外装体である本体外ケース１１側および内鍋支持部材である内ケース１４側の所定の取り付け支持部材であるスペーサ４９Ａ，４９Ｂにより支持されることによって、内側および外側の遮断シート付き断熱材４６，４８との間に所定の断熱空気層Ｍ，Ｍ，Ｎを形成している。Next, the heat insulating material 47 with the shielding sheet located in the middle is formed thicker than the heat insulating material 46 with the inner shielding sheet, but thinner than the heat insulating material 48 with the outer shielding sheet. Are supported by spacers 49A and 49B which are predetermined mounting support members on the outer case 11 side which is the main body and the inner case 14 side which is the inner pot support member, and thereby the heat insulating materials 46 and 48 with the inner and outer blocking sheets are provided. A predetermined insulating air layer M, M, N is formed between the two.

このため、その内外両側に断熱空気層Ｍ，Ｍ，Ｎによる有効な断熱空間が形成され、同部分には、中間に位置する遮断シート付き断熱材４７自身の厚みによる断熱部と合わせて内外方向に３重の断熱部を形成することができる。For this reason, effective heat insulation spaces by the heat insulating air layers M, M, and N are formed on both the inner and outer sides, and the inner and outer directions are combined with the heat insulating portions due to the thickness of the heat insulating material 47 with a blocking sheet located in the middle. A triple heat insulating part can be formed.

さらに、設置スペースの自由度も大きい外方の外側遮断シート付き断熱材４８は、所望に厚さが厚くなるように形成されており、季節に応じて温度が大きく変動する炊飯器本体外方（外ケース１１外方）からの外気に対して有効な断熱作用を果たすようになっている。Furthermore, the outer insulation material 48 with an outer outer shielding sheet having a large degree of freedom of installation space is formed so as to be thick as desired, and the outside of the rice cooker main body where the temperature varies greatly according to the season ( An effective heat insulating action is achieved against the outside air from outside the outer case 11.

したがって、このような構成の場合、内ケース１４と外ケース１１との間には、上記中間の遮断シート付き断熱材４７による両端側の断熱空気層Ｍ，Ｍ，Ｎと合わせて、結局内外方向に５重の断熱部が形成されることになり、極めて断熱機能の高い構造となる。Therefore, in the case of such a configuration, between the inner case 14 and the outer case 11, the heat insulating air layers M, M, N on both end sides by the intermediate heat insulating material 47 with the shielding sheet are combined, and finally the inner and outer directions. Thus, a five-fold heat insulating portion is formed, and the structure has a very high heat insulating function.

また、以上の場合、上記断熱空気層Ｍ，Ｍ，Ｎは、炊飯器本体の肩部１３側スペーサ４９Ａ、内ケース１４の底部材１４Ａ側スペーサ４９Ｂで中間に位置する遮断シート付き断熱材４７の上下両端側を屈曲（曲成）させることにより、上記内外方向３組の遮断シート付き断熱材４６，４７，４８相互間の上下方向に部分的に画成して設けられている。Moreover, in the above case, the heat insulating air layers M, M, and N are formed of the insulating sheet 47 with a shielding sheet positioned in the middle between the shoulder portion 13 side spacer 49A of the rice cooker body and the bottom member 14A side spacer 49B of the inner case 14. The upper and lower ends are bent (bent) so as to be partially defined in the vertical direction between the three heat insulating materials 46, 47, and 48 with the shielding sheet in the inner and outer directions.

このように中間断熱部材４７両側の各断熱空気層Ｍ，Ｍ，Ｎが上下方向に画成（閉鎖）して部分的に設けられていると、外部および相互間の空気の移動、流通がないので、全体が上下方向に連通している場合に比べて、より断熱機能が向上する。この結果、さらに断熱機能が向上する。Thus, if each heat insulation air layer M, M, N on both sides of the intermediate heat insulation member 47 is partially provided by defining (closing) in the vertical direction, there is no movement and distribution of air between the outside and each other. Therefore, compared with the case where the whole is communicating in the up-and-down direction, a heat insulation function improves more. As a result, the heat insulation function is further improved.

しかも、この場合、上記中間に位置する遮断シート付き断熱材４７は、上下方向中央部は、上記内側断熱材４６の外周に重合されているが、その上下両端側で上記炊飯器本体の肩部１３側および内ケース１４側の所定の取り付け部材であるスペーサ４９Ａ，４９Ｂにより安定して支持されるようになっているので、屈曲（曲成）状態を容易かつ確実に維持することができ、内側および外側の各遮断シート付き断熱材４６，４８との間に確実に所定の断熱空気層Ｍ，Ｍ，Ｎを実現することができる。In addition, in this case, the heat insulating material 47 with the blocking sheet located in the middle is superposed on the outer periphery of the inner heat insulating material 46 in the vertical direction, but the shoulder portion of the rice cooker body at both the upper and lower ends thereof. Since it is stably supported by spacers 49A and 49B which are predetermined attachment members on the 13th side and the inner case 14 side, the bent (curved) state can be easily and reliably maintained, and the inner side And predetermined heat-insulating air layers M, M, and N can be reliably realized between the heat insulating materials 46 and 48 with the respective shielding sheets on the outside.

本願発明の参考例の電気炊飯器の左右方向中央縦断面図である。It is a horizontal direction center longitudinal cross-sectional view of the electric rice cooker of the reference example of this invention . 図１の電気炊飯器の前後方向中央縦断面図である。It is a center longitudinal cross-sectional view of the front-back direction of the electric rice cooker of FIG. 図１の電気炊飯器における内ケース及び断熱体部分を下方から見た状態の分解斜視図である。It is the disassembled perspective view of the state which looked at the inner case and the heat insulation part in the electric rice cooker of FIG. 1 from the downward direction. 図１のIV部分の拡大図である。FIG. 4 is an enlarged view of a portion IV in FIG. 1. 本願発明の実施形態の電気炊飯器の左右方向中央縦断面図である。It is a horizontal direction center longitudinal cross-sectional view of the electric rice cooker of embodiment of this invention . 図５の電気炊飯器の前後方向中央縦断面図である。It is a center longitudinal cross-sectional view of the front-back direction of the electric rice cooker of FIG.

１は炊飯器本体、２は蓋体、３は電気加熱部材、１０は外装体、１１は外ケース、１２は底部材、１４は内ケース、１５は内鍋、３１は電気ヒータ、３２はヒータ端子、３３は絶縁キャップ、３４は絶縁部材、３５は保温ヒータ、３６，３７はワークコイル、４１は内側断熱材、４２は外側断熱材、４３は下部断熱材、４６は内側断熱材、４７は中間断熱材、４８は外側断熱材、ａは断熱基材、ｂは遮断シート、Ｍ，Ｎは断熱空気層である。 DESCRIPTION OF SYMBOLS 1 is a rice cooker body, 2 is a lid, 3 is an electric heating member, 10 is an exterior body, 11 is an outer case, 12 is a bottom member, 14 is an inner case, 15 is an inner pot, 31 is an electric heater, 32 is a heater Terminals, 33, insulating caps, 34, insulating members, 35, heat insulation heaters, 36, 37, work coils, 41, inner heat insulating materials, 42, outer heat insulating materials, 43, lower heat insulating materials, 46, inner heat insulating materials, 47, An intermediate heat insulating material, 48 is an outer heat insulating material, a is a heat insulating base material, b is a blocking sheet, and M and N are heat insulating air layers.

Claims (2)

炊飯器本体の外装体内に内ケースを設け、該内ケース内に内鍋を収容し、電気加熱部材で加熱するとともに、上記内ケースの外周に断熱体を設け、該断熱体に、通気性のある断熱基材と通気を遮断する遮断シートとを貼り合わせた遮断シート付き断熱材を内外方向に少なくとも３組重合させたものを使用してなる電気炊飯器であって、上記内外方向３組の遮断シート付き断熱材は、内側のものよりも外側のものが順次厚さが厚くなっているとともに、中間に位置する遮断シート付き断熱材は、上下両端側で上記外装体側および内ケース側の所定の取り付け部材により支持されることによって、それよりも内側および外側の各遮断シート付き断熱材との間に所定の断熱空気層を形成していることを特徴とする電気炊飯器。 The inner case is provided on the exterior body of the cooker body, houses the Uchinabe within inner casing, together with heating in electric heating element, a heat insulating member provided on the outer periphery of the inner case, in the insulation, ventilation An electric rice cooker using at least three sets of heat insulating materials with a blocking sheet obtained by laminating a heat insulating base material and a blocking sheet that blocks ventilation, in the inner and outer directions. The heat insulating material with a blocking sheet is thicker in the outer one than the inner one, and the heat insulating material with the blocking sheet located in the middle is on the outer body side and the inner case side on the upper and lower ends. An electric rice cooker characterized in that a predetermined heat-insulating air layer is formed between each of the inner and outer heat insulating materials with a blocking sheet by being supported by a predetermined mounting member . 炊飯器本体の外装体内に内ケースを設け、該内ケース内に内鍋を収容し、電気加熱部材で加熱するとともに、上記内ケースの外周に断熱体を設け、該断熱体に、通気性のある断熱基材と通気を遮断する遮断シートとを貼り合わせた遮断シート付き断熱材を内外方向に少なくとも３組重合させたものを使用し、同内外方向３組の遮断シート付き断熱材の相互間に所定の断熱空気層を設けてなる電気炊飯器であって、上記所定の断熱空気層は、中間に位置する遮断シート付き断熱材を曲成させることにより、上記内外方向３組の遮断シート付き断熱材相互間の上下方向に部分的に画成して設けられていることを特徴とする電気炊飯器。 An inner case is provided in the outer body of the rice cooker body, the inner pan is accommodated in the inner case, heated by an electric heating member, and a heat insulator is provided on the outer periphery of the inner case. Using a heat insulating material with a blocking sheet in which a certain heat insulating base material and a blocking sheet for blocking air flow are bonded together in the inner and outer directions, between the three inner and outer heat insulating materials with a blocking sheet An electric rice cooker provided with a predetermined heat insulating air layer, wherein the predetermined heat insulating air layer is provided with three sets of blocking sheets in the inner and outer directions by bending a heat insulating material with a blocking sheet positioned in the middle. An electric rice cooker characterized by being partially defined in the vertical direction between heat insulating materials .
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