JP4106837B2 - Electric water heater - Google Patents

Electric water heater Download PDF

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Publication number
JP4106837B2
JP4106837B2 JP35294199A JP35294199A JP4106837B2 JP 4106837 B2 JP4106837 B2 JP 4106837B2 JP 35294199 A JP35294199 A JP 35294199A JP 35294199 A JP35294199 A JP 35294199A JP 4106837 B2 JP4106837 B2 JP 4106837B2
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JP
Japan
Prior art keywords
heat insulating
container
insulating material
vacuum heat
water heater
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Expired - Fee Related
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JP35294199A
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Japanese (ja)
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JP2001161565A (en
Inventor
清義 高田
隆行 浦田
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Application filed by Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP35294199A priority Critical patent/JP4106837B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、収容液体を加熱・保温する電気湯沸かし器の断熱構成に関するものである。
【0002】
【従来の技術】
従来この種の電気湯沸かし器は、図19に示すようなものがあった。図において1は外側部を構成するボデーで、水などの液体2を収容する容器3を内包している。4は注口で中央開口部に容器3を載置し、容器3の外側面には真空断熱材などの容器断熱体5が装着されている。この容器3の外底面部には内部の液体2を加熱・保温する加熱手段6とサーミスターなどの感温素子7が装着されている。8は蓋体で容器3の上方開口部を開閉自在に取り付けられ、蓋体8の内部には発泡ポリプロピレン、アルミ箔などの蓋断熱体9が内包されている。10は感温素子7からの電気信号により容器3内の液体2の温度を制御する制御回路である。
【0003】
以上の構成により、液体2は加熱手段6により一定温度に加熱・保温され、保温中は容器3側面の容器断熱体5および蓋体8内部の蓋断熱体9により容器側面および容器上方からの放熱を抑え保温電力量を低減する構成となっていた。
【0004】
【発明が解決しようとする課題】
しかしながら、上記従来の構成においては、真空断熱材の上端部および下端部における放熱が大きいため断熱性能の大幅な改善が困難であるという課題があった。
【0005】
【課題を解決するための手段】
本発明は上記従来の課題を解決するもので、液体を収容する有底筒状の容器と、前記容器内の液体を加熱・保温する加熱手段と、前記容器の上方開口部を覆う蓋体と、前記蓋体に装着され前記蓋体閉時に前記容器の上方開口部と当接する防水パッキングと、前記容器 の外周部に位置し芯材を外袋で覆い内部を真空状態にした真空断熱材と、前記真空断熱材の外周部に位置するボデーと、前記ボデー上部に載置され前記容器の上方開口部を保持する注口とを有し、前記防水パッキングと前記容器の当接部より上方に前記真空断熱材の上端を位置させたものである。
【0006】
これにより、防水パッキングと容器の当接面で発生する放熱を大幅に抑制でき、保温時の消費電力量を大幅に低減でき経済性の高い電気湯沸かし器を提供することができる。
【0007】
【発明の実施の形態】
本発明の請求項1に記載の発明は、液体を収容する有底筒状の容器と、前記容器内の液体を加熱・保温する加熱手段と、前記容器の上方開口部を覆う蓋体と、前記蓋体に装着され前記蓋体閉時に前記容器の上方開口部と当接する防水パッキングと、前記容器の外周部に位置し芯材を外袋で覆い内部を真空状態にした真空断熱材と、前記真空断熱材の外周部に位置するボデーと、前記ボデー上部に載置され前記容器の上方開口部を保持する注口とを有し、前記防水パッキングと前記容器の当接部より上方に前記真空断熱材の上端を位置させた構成としたものである。この構成により、防水パッキングと容器の当接面で発生する放熱を大幅に抑制でき、保温時の消費電力量を低減できるという作用を有する。
【0008】
請求項に記載の発明は、真空断熱材の上端厚さを中央厚さよりも薄くした構成としたものである。この構成によれば、ボデーと注口と容器に囲われた真空断熱材の限られた装着スペースを最小限に抑えつつ防水パッキングと容器の当接面で発生する放熱を大幅に抑制できることができるため、製品のコンパクト化を損ねずに断熱性能を向上できるという作用を有する。
【0009】
請求項に記載の発明は、真空断熱材の上端を容器の外側面と注口の内側面との間に配した構成としたものである。この構成により、容器上端部は真空断熱材の上端で直接的に断熱でき、さらに断熱性能を向上できるという作用を有する。
【0010】
請求項に記載の発明は、ボデー対流防止部材を真空断熱材の内周もしくは外周に隣接して配した構成としたものである。この構成により、ボデー対流防止部材と真空断熱材の下端間での熱抵抗をさらに高めることができ容器下部の高温空間と中低温なるボデーと間の遮へい効果を向上できるという作用を有する。
【0011】
請求項に記載の発明は、ボデー対流防止部材を真空断熱材の下端内周および外周で隣接させた構成としたものである。この構成により、真空断熱材の下端とボデー対流防止部材との隙間で発生する容器下部の高温空間からのヒートリークを抑えることができ、さらに断熱性能を向上できるという作用を有する。また、真空断熱材下端の位置が規制されるため真空断熱材と容器との間に空気層が発生したり、真空断熱材の下端がボデーに接触したりするなど断熱性能悪化の要因から回避できるという作用も有する。
【0012】
【実施例】
以下、本発明の実施例について図面を参照して説明する。
【0013】
参考例1)
以下に、本発明の第1の参考例を図1、図2により説明する。図1において、液体22を収容する有底筒状の容器23と、液体22を加熱・保温する加熱手段26と、容器23の上方開口部を覆う蓋体28と、蓋体28内部には発泡ポリプロピレン樹脂などを用いた蓋断熱材29と、蓋体28に装着され蓋体閉時に容器23の上方開口部と当接する防水パッキング30と、容器23の外周部に位置し芯材31(シリカ、パーライトなどの無機粉末、あるいはグラスウールなどの無機繊維、硬質ウレタンフォーム、発泡フェノール樹脂などを用いる)を外袋32(樹脂フィルム、樹脂・金属箔ラミネートフィルム、例えば、ナイロン・PET・アルミ箔・無延伸ポリプロピレンなど)で覆い内部を真空状態(大気圧以下)にした真空断熱材34と、真空断熱材34の外周部に位置するボデー21と、ボデー21上部に載置され容器23の上方開口部を保持する注口24とから構成されている。
【0014】
真空断熱材34の上端は蓋体28閉時に防水パッキング30と容器23が当接する面の相反する面に位置させた構成としている。
【0015】
次に、本参考例における作用を説明する。液体22は加熱手段により一定温度に加熱・保温され、保温中は容器23の外周部に配置した筒状の真空断熱材34(熱伝導率=約0.0050〜0.0070kcal/mh℃)および蓋体28内部の蓋断熱材29により、容器23側面および容器23上方からの放熱を抑制できるものである。従来の構成では、防水パッキング30と容器23の当接部から真空断熱材の上端までの間における放熱が非常に大きいため保温電力量の低減が非常に困難であった。しかしながら、本参考例の構成においては真空断熱材34の上端を防水パッキング30と容器23が当接する面の相反する面に配しているためこの部位での熱損失を大幅に抑制できるものである。
【0016】
また、本参考例の電気湯沸かし器において保温温度の設定を最高温度(98℃保温)としたとき、保温安定時の平均保温電力量は33wh/hであり、従来構成の性能(37wh/h)と比較して約4wh/h改善が図れた。
【0017】
以上の構成から明らかなように、高断熱効率なる真空断熱材34の上端を蓋体28閉時の防水パッキング30と容器23が当接する面の相反する面に配することで放熱を大幅に抑制でき、保温時の消費電力量を低減できるものである。
【0018】
(実施例
以下に、本発明の第の実施例を図3により説明する。図において、防水パッキング30と容器23の当接部より上方に真空断熱材34の上端を位置させた構成としたものである。その他は参考例1で説明したとおりである。この構成によれば防水パッキング30と容器23の当接部抑制からの放熱も抑制でき、また注口24の外部に通ずる伝熱距離も確保できるため断熱性能をさらに向上させるという作用を有する。
【0019】
(実施例
以下に、本発明の第の実施例を図4により説明する。図において、真空断熱材34の上端部厚さを中央部厚さよりも薄くした構成としたものである。その他は参考例1で説明したとおりである。
【0020】
次に、本実施例における作用を説明する。参考例1の図2で示した構成で実施例の構成を満足させるとすればボデー21の外形を大きく取る必要があり、その場合、商品のコンパクト性が損なわれる。本実施例の構成によれば、コンパクト性を損なわずに断熱構成を実現できるものである。具体的には、真空断熱材34の完成品をロール加工する際に一方の端部のみ厚み設定を薄くすることでこの構成を実現できる。
【0021】
以上の構成から明らかなように、真空断熱材34の上方端部のみ厚みを薄くすることで商品のコンパクト性を損なうことなく断熱性能を向上でき、保温電力量を低減できるという作用を有する。
【0022】
(実施例
以下に、本発明の第の実施例を図5により説明する。図において、真空断熱材34の上端部を注口24と容器23の外側面との間に配置した構成としたものである。つまり、注口24の内側面と容器23の外側面との間に真空断熱材34の上端部を配置した構成としている。
【0023】
次に、本実施例における作用を説明する。真空断熱材34の上端は容器23の上端まで直接的に被覆するため、注口24を介する伝熱量を大幅に低減するものである。
【0024】
以上の構成から明らかなように、容器23の上端は真空断熱材34の上端により直接的に断熱できるため、さらに断熱性能を向上できるという作用を有する。
【0025】
参考
以下に、本発明の第参考例を図6により説明する。図において、真空断熱材34の上端内周および外周に注口24より略同軸の円周リブ35(内周リブ35a、外周リブ35b)を配し、円周リブ先端を真空断熱材34に当接させた構成としたものである。
【0026】
次に、本参考例における作用を説明する。注口24に形設した円周リブ35により真空断熱材34の上端と注口24との隙間で発生するヒートリークを抑えることができるというものである。
【0027】
以上の構成から明らかなように、真空断熱材34の上端で発生するヒートリークを注口24に形設した円周リブ35により抑制できるため、断熱性能をさらに向上できるという作用を有する。
【0028】
参考
以下に、本発明の第参考例を図7により説明する。図において、注口24に略同軸の二つの円周リブ35のうち外周リブ35bの先端を内周リブ35aの先端より下方に位置させた構成としたものである。
【0029】
次に、本参考例における作用を説明する。真空断熱材34の上端と注口24との隙間が部分的に開放状態となったとしても外周リブ35bの先端が内周リブ35aの先端より下方に位置しているので熱抵抗となり、容易に外部へ放熱しない。
【0030】
以上の構成から明らかなように、真空断熱材34の上端で発生するヒートリークを注口24に形設した外周リブ35bにより更に抑制できるため、断熱性能をさらに向上できるという作用を有する。
【0031】
参考
以下に、本発明の第参考例を図8により説明する。図において、容器23の下部に配した加熱手段26を覆う遮熱板36などの高温部品の周囲を覆う位置に真空断熱材34の下端を配した構成としたものである。この構成によれば、加熱手段26周辺の高温部品からの放熱を抑制でき、ボデー21下部における熱流出を低減することで断熱性能を向上できるという作用を有する。
【0032】
参考
以下に、本発明の第参考例を図9、10により説明する。図において、ボデー21の内側底部上面に先端が真空断熱材34の下端に隣接してなるボデー対流防止部材37を全周もしくは一部に配した構成としたものである。
【0033】
次に、本参考例における作用を説明する。加熱手段26を覆う遮熱板36などの高温部品を配した容器23下部で発生する対流はボデー21の内側底部上面に配したボデー対流防止部材37により閉空間を形接されることで阻止されボデー21の下部内側面に直接至らしめることはない。
【0034】
以上の構成から明らかなように、ボデー対流防止部材37により容器23下部で発生する対流がボデー21の下部内側面に直接的に接触することを回避できることで、ボデー21の下部で発生する放熱を抑制でき、さらに断熱性能を向上できるという作用を有する。
【0035】
また、図10の如くボデー21の下部で一体構成すれば部品点数を増やすことなく同効果を得ることが可能となる。
【0036】
(実施例
以下に、本発明の第の実施例を図11および図12により説明する。図において、ボデー対流防止部材37を真空断熱材34の内周もしくは外周に配した構成としたものである。この構成によれば、真空断熱材34とボデー対流防止部材37との間の熱抵抗はさらに増大し、対流による放熱を抑制させる作用を有する。
【0037】
(実施例
以下に、本発明の第の実施例を図13により説明する。図において、ボデー対流防止部材37を真空断熱材34の下方端部の内周および外周に隣接させて配した構成としたものである。この構成によれば、加熱手段26を覆う遮熱板36などの高温部品を配した容器23下部はさらに閉空間化され対流による放熱を大幅に抑制させる作用を有する。
【0038】
参考
以下に、本発明の第参考例を図14により説明する。図において、遮熱板36の外周に対流防止壁38を形設し真空断熱材34とを隣接させた構成としたものである。
【0039】
次に、本参考例における作用を説明する。容器23の下部に配した加熱手段26とそれを覆う遮熱板36の間で発生する空気対流は対流防止壁38と真空断熱材34との隣接部により熱抵抗となり外部の流出を抑制できるものである。
【0040】
以上の構成から明らかなように、加熱手段26と遮熱板36の空間の外周に対流防止壁38による熱抵抗を設けることで放熱を抑制させる作用を有する。
【0041】
参考
以下に、本発明の第参考例を図15により説明する。図において、遮熱板36の外周に形設した対流防止壁38と真空断熱材34とを当接させた構成としたものである。この構成によれば、容器23の下部に配した加熱手段26とそれを覆う遮熱板36および真空断熱材34は閉空間となり対流による放熱を大幅に抑制させる作用を有する。
【0042】
参考
以下に、本発明の第参考例を図16により説明する。図において、ボデー21の内側面側に真空断熱材34と隣接するボデー内面リブ39を複数本形設したもので、これにより真空断熱材34とボデー21内面との面接触を回避でき固体の熱伝導による断熱効果の悪化を最小限に抑えることができるという作用を有する。さらに、形設したボデー内面リブ39と真空断熱材34およびボデー21の内面で覆われた空気断熱隔離層により周方向での空気対流を抑えると同時に空気断熱効果で断熱性能を向上できるという作用も有する。
【0043】
参考
以下に、本発明の第参考例を図17により説明する。図において、防水パッキング30の外側面にリップ40を形設しリップ40の先端を隣接する注口24と当接させた構成としたものである。この構成によれば、防水パッキング30と容器23との当接部(シール部)で発生する熱流出は防水パッキング30に形設したリップ40が熱抵抗となり遮断できるため断熱性能をさらに向上できるという作用を有する。
【0044】
参考10
以下に、本発明の第10参考例を図18により説明する。図において、蓋体28の外周面は注口24の上面よりも下側に位置させた構成としたものである。この構成によれば、防水パッキング30と容器23との当接部(シール部)で発生する熱流出は外部と通ずる外周部で蓋体28の外周面が熱抵抗となることで抑制されるため断熱性能をさらに向上できるという作用を有する。
【0045】
【発明の効果】
以上の実施例の説明より明らかなように、請求項1記載の説明によれば、防水パッキングと容器の当接部より上方に真空断熱材の上端を位置させることで防水パッキングと容器の当接面で発生する放熱を大幅に抑制でき保温電力量を更に低減できるものである。
【0046】
また、請求項記載の発明によれば、真空断熱材の上方端部のみ厚みを薄くすることで商品のコンパクト性を損なうことなく断熱性能を向上でき、保温電力量を低減できるものである。
【0047】
また、請求項記載の発明によれば、容器の上端は真空断熱材の上端により直接的に断熱できるため、さらに断熱性能を向上できるものである。
【0048】
また、請求項記載の発明によれば、ボデー対流防止部材を真空断熱材の内周もしくは外周に隣接して配することでボデー対流防止部材と真空断熱材の下端間での熱抵抗をさらに高めることができ容器下部の高温空間と中低温なるボデーと間の遮へい効果を向上できるものである。
【0049】
また、請求項記載の発明によれば、ボデー対流防止部材を真空断熱材の下端内周および外周で隣接させることにより、真空断熱材の下端とボデー対流防止部材との隙間で発生する容器下部の高温空間からのヒートリークを抑えることができ、さらに断熱性能を向上できるものである。また、真空断熱材下端の位置が規制されるため真空断熱材と容器との間に空気層が発生したり、真空断熱材の下端がボデーに接触したりするなど断熱性能悪化の要因から回避できるものである。
【図面の簡単な説明】
【図1】 本発明の第1の参考例を示す電気湯沸かし器の断面図
【図2】 本発明の第1の参考例を示す電気湯沸かし器の要部拡大断面図
【図3】 本発明の第の実施例を示す電気湯沸かし器の要部拡大断面図
【図4】 本発明の第の実施例を示す電気湯沸かし器の要部拡大断面図
【図5】 本発明の第の実施例を示す電気湯沸かし器の要部拡大断面図
【図6】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図7】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図8】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図9】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図10】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図11】 本発明の第の実施例を示す電気湯沸かし器の要部拡大断面図
【図12】 本発明の第の実施例を示す電気湯沸かし器の要部拡大断面図
【図13】 本発明の第の実施例を示す電気湯沸かし器の要部拡大断面図
【図14】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図15】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図16】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図17】 本発明の第参考例を示す電気湯沸かし器の要部拡大断面図
【図18】 本発明の第10参考例を示す電気湯沸かし器の要部拡大断面図
【図19】 従来の電気湯沸かし器を示す断面図
【符号の説明】
21 ボデー
22 液体
23 容器
24 注口
26 加熱手段
28 蓋体
29 蓋断熱材
30 防水パッキング
31 芯材
32 外袋
34 真空断熱材
35 円周リブ
35a 内周リブ
35b 外周リブ
36 遮熱板
37 ボデー対流防止部材
38 対流防止壁
39 ボデー内面リブ
40 リップ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat insulation structure of an electric water heater for heating and keeping a stored liquid.
[0002]
[Prior art]
Conventionally, this type of electric water heater is as shown in FIG. In the figure, reference numeral 1 denotes a body constituting an outer portion, which encloses a container 3 for storing a liquid 2 such as water. Reference numeral 4 denotes a spout on which the container 3 is placed in the central opening, and a container heat insulator 5 such as a vacuum heat insulating material is mounted on the outer surface of the container 3. On the outer bottom surface of the container 3, a heating means 6 for heating and keeping the internal liquid 2 and a temperature sensitive element 7 such as a thermistor are mounted. Reference numeral 8 denotes a lid which is attached to the upper opening of the container 3 so as to be openable and closable. A lid insulator 9 such as foamed polypropylene or aluminum foil is included inside the lid 8. A control circuit 10 controls the temperature of the liquid 2 in the container 3 by an electric signal from the temperature sensing element 7.
[0003]
With the above configuration, the liquid 2 is heated and kept at a constant temperature by the heating means 6, and heat is radiated from the side of the container and above the container by the container insulator 5 on the side of the container 3 and the lid insulator 9 inside the lid 8 during the heat insulation. It was the structure which suppressed heat insulation electric energy.
[0004]
[Problems to be solved by the invention]
However, in the above conventional configuration, there is a problem that it is difficult to significantly improve the heat insulation performance because the heat radiation at the upper end and the lower end of the vacuum heat insulating material is large.
[0005]
[Means for Solving the Problems]
The present invention solves the above-described conventional problems, and includes a bottomed cylindrical container that stores liquid, heating means that heats and retains the liquid in the container, and a lid that covers the upper opening of the container; A waterproof packing that is attached to the lid and contacts the upper opening of the container when the lid is closed , and a vacuum heat insulating material that is located on the outer periphery of the container and that covers the core with an outer bag to create a vacuum inside. A body located on the outer periphery of the vacuum heat insulating material, and a spout placed on the body to hold the upper opening of the container, and above the waterproof packing and the contact portion of the container The upper end of the vacuum heat insulating material is positioned .
[0006]
Thereby, the heat dissipation which generate | occur | produces in the contact surface of a waterproof packing and a container can be suppressed significantly, the power consumption at the time of a heat retention can be reduced significantly, and a highly economical electric water heater can be provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention includes: a bottomed cylindrical container housing the liquid, and heating means for heating and insulation liquid in the container, a lid for covering an upper opening of the container, a waterproof packing which contacts the upper opening of the container the lid is closed is attached to the lid, and the vacuum heat insulating material of the core located in the outer peripheral portion of the container the inside covered with the outer bag in a vacuum state, and the body is located in the outer peripheral portion of the vacuum insulation material is placed on the body upper and a spout for holding the upper opening of the container, the above the contact portion of the container and the waterproof packing The upper end of the vacuum heat insulating material is positioned. With this configuration, heat radiation generated at the contact surface between the waterproof packing and the container can be significantly suppressed, and the amount of power consumed during heat insulation can be reduced.
[0008]
The invention according to claim 2 is configured such that the upper end thickness of the vacuum heat insulating material is thinner than the central thickness. According to this configuration, it is possible to greatly suppress the heat radiation generated on the contact surface between the waterproof packing and the container while minimizing the limited mounting space of the vacuum heat insulating material surrounded by the body, the spout, and the container. Therefore, it has the effect | action that a heat insulation performance can be improved, without impairing compactization of a product.
[0009]
The invention described in claim 3 is configured such that the upper end of the vacuum heat insulating material is disposed between the outer side surface of the container and the inner side surface of the spout. With this configuration, the upper end portion of the container can be directly insulated at the upper end of the vacuum heat insulating material, and has the effect of further improving the heat insulating performance.
[0010]
The invention according to claim 4 is configured such that the body convection preventing member is disposed adjacent to the inner periphery or the outer periphery of the vacuum heat insulating material. With this configuration, the thermal resistance between the body convection preventing member and the lower end of the vacuum heat insulating material can be further increased, and the shielding effect between the high-temperature space at the lower part of the container and the medium-low temperature body can be improved.
[0011]
The invention according to claim 5 is configured such that the body convection preventing member is adjacent to the inner periphery and the outer periphery of the lower end of the vacuum heat insulating material. With this configuration, it is possible to suppress heat leak from the high-temperature space in the lower part of the container that is generated in the gap between the lower end of the vacuum heat insulating material and the body convection preventing member, and to further improve the heat insulating performance. In addition, since the position of the lower end of the vacuum heat insulating material is regulated, an air layer is generated between the vacuum heat insulating material and the container, or the lower end of the vacuum heat insulating material can come into contact with the body, which can be avoided from factors that deteriorate the heat insulating performance. It also has the effect.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
( Reference Example 1)
Hereinafter, a first reference example of the present invention will be described with reference to FIGS. In FIG. 1, a bottomed cylindrical container 23 that contains a liquid 22, a heating means 26 that heats and keeps the liquid 22, a lid body 28 that covers the upper opening of the container 23, and foam inside the lid body 28. A lid heat insulating material 29 using polypropylene resin or the like, a waterproof packing 30 that is attached to the lid body 28 and comes into contact with the upper opening of the container 23 when the lid body is closed, and a core 31 (silica, Outer bag 32 (resin film, resin / metal foil laminate film such as nylon / PET / aluminum foil / non-stretched) using inorganic powder such as pearlite, inorganic fiber such as glass wool, rigid urethane foam, foamed phenol resin, etc. A vacuum heat insulating material 34 whose interior is covered with a vacuum (atmospheric pressure or less), a body 21 positioned on the outer periphery of the vacuum heat insulating material 34, and a body And a spout 24 for holding the upper opening of the placed on the container 23 to first upper.
[0014]
The upper end of the vacuum heat insulating material 34 is configured to be positioned on the opposite surface of the surface where the waterproof packing 30 and the container 23 abut when the lid 28 is closed.
[0015]
Next, the operation of this reference example will be described. The liquid 22 is heated and kept at a constant temperature by a heating means, and during the heat insulation, a cylindrical vacuum heat insulating material 34 (heat conductivity = about 0.0050 to 0.0070 kcal / mh ° C.) disposed on the outer periphery of the container 23 and The heat insulation from the side surface of the container 23 and the upper side of the container 23 can be suppressed by the lid heat insulating material 29 inside the lid body 28. In the conventional configuration, since the heat radiation between the contact portion of the waterproof packing 30 and the container 23 and the upper end of the vacuum heat insulating material is very large, it is very difficult to reduce the amount of heat insulation. However, in the configuration of this reference example , since the upper end of the vacuum heat insulating material 34 is disposed on the opposite surface of the surface where the waterproof packing 30 and the container 23 abut, heat loss at this portion can be significantly suppressed. .
[0016]
In the electric water heater of this reference example , when the heat retention temperature is set to the maximum temperature (98 ° C. heat retention), the average heat retention power amount during stable heat retention is 33 wh / h, and the performance of the conventional configuration (37 wh / h) Compared with that, an improvement of about 4 wh / h was achieved.
[0017]
As is clear from the above configuration, heat radiation is greatly suppressed by arranging the upper end of the vacuum heat insulating material 34 with high heat insulation efficiency on the opposite surface of the surface where the waterproof packing 30 and the container 23 abut when the lid 28 is closed. It is possible to reduce the amount of power consumption during heat insulation.
[0018]
(Example 1 )
Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In the figure, the upper end of the vacuum heat insulating material 34 is positioned above the contact portion between the waterproof packing 30 and the container 23. Others are as described in Reference Example 1. According to this configuration, it is possible to suppress heat dissipation from suppressing the contact portion between the waterproof packing 30 and the container 23, and to secure a heat transfer distance that leads to the outside of the spout 24, thereby further improving the heat insulating performance.
[0019]
(Example 2 )
Hereinafter, a description will be given of a second embodiment of the present invention by FIG. In the figure, the thickness of the upper end portion of the vacuum heat insulating material 34 is made thinner than the thickness of the central portion. Others are as described in Reference Example 1.
[0020]
Next, the operation of this embodiment will be described. There is necessary to increase the external shape of the body 21 if satisfy the configuration of Example 1 in the configuration shown in FIG. 2 of Reference Example 1, in which case, is impaired compactness of the product. According to the configuration of the present embodiment, a heat insulating configuration can be realized without impairing compactness. Specifically, when the finished product of the vacuum heat insulating material 34 is rolled, this configuration can be realized by reducing the thickness of only one end.
[0021]
As is clear from the above configuration, by reducing the thickness only at the upper end of the vacuum heat insulating material 34, there is an effect that the heat insulating performance can be improved without impairing the compactness of the product, and the heat insulation power can be reduced.
[0022]
(Example 3 )
Hereinafter, a third embodiment of the present invention will be described with reference to FIG. In the figure, the upper end portion of the vacuum heat insulating material 34 is arranged between the spout 24 and the outer surface of the container 23. That is, the upper end portion of the vacuum heat insulating material 34 is disposed between the inner side surface of the spout 24 and the outer side surface of the container 23.
[0023]
Next, the operation of this embodiment will be described. Since the upper end of the vacuum heat insulating material 34 is covered directly to the upper end of the container 23, the amount of heat transfer through the spout 24 is greatly reduced.
[0024]
As is clear from the above configuration, the upper end of the container 23 can be directly insulated by the upper end of the vacuum heat insulating material 34, so that the heat insulating performance can be further improved.
[0025]
( Reference Example 2 )
The second reference example of the present invention will be described below with reference to FIG. In the figure, circumferential ribs 35 (inner circumferential ribs 35 a and outer circumferential ribs 35 b) that are substantially coaxial from the spout 24 are arranged on the inner periphery and outer periphery of the upper end of the vacuum heat insulating material 34, and the tips of the circumferential ribs contact the vacuum heat insulating material 34. The structure is in contact with each other.
[0026]
Next, the operation of this reference example will be described. The circumferential rib 35 formed on the spout 24 can suppress heat leak that occurs in the gap between the upper end of the vacuum heat insulating material 34 and the spout 24.
[0027]
As is clear from the above configuration, heat leaks generated at the upper end of the vacuum heat insulating material 34 can be suppressed by the circumferential rib 35 formed in the spout 24, so that the heat insulating performance can be further improved.
[0028]
( Reference Example 3 )
The third reference example of the present invention will be described below with reference to FIG. In the figure, the tip of the outer peripheral rib 35b is positioned below the tip of the inner peripheral rib 35a out of the two peripheral ribs 35 substantially coaxial with the spout 24.
[0029]
Next, the operation of this reference example will be described. Even if the gap between the upper end of the vacuum heat insulating material 34 and the spout 24 is partially opened, the distal end of the outer peripheral rib 35b is located below the distal end of the inner peripheral rib 35a, so that heat resistance is easily generated. Do not dissipate heat to the outside.
[0030]
As is clear from the above configuration, heat leakage that occurs at the upper end of the vacuum heat insulating material 34 can be further suppressed by the outer peripheral rib 35b formed in the spout 24, so that the heat insulating performance can be further improved.
[0031]
( Reference Example 4 )
The fourth reference example of the present invention will be described below with reference to FIG. In the figure, the lower end of the vacuum heat insulating material 34 is arranged at a position covering the periphery of a high-temperature component such as a heat shield plate 36 covering the heating means 26 arranged at the lower part of the container 23. According to this configuration, heat radiation from the high-temperature components around the heating means 26 can be suppressed, and heat insulation performance can be improved by reducing heat outflow in the lower part of the body 21.
[0032]
( Reference Example 5 )
Hereinafter, a fifth reference example of the present invention will be described with reference to FIGS. In the figure, a body convection prevention member 37 whose tip is adjacent to the lower end of the vacuum heat insulating material 34 is disposed on the entire inner surface or part of the upper surface of the inner bottom portion of the body 21.
[0033]
Next, the operation of this reference example will be described. Convection generated in the lower part of the container 23 provided with high-temperature parts such as a heat shield plate 36 covering the heating means 26 is prevented by forming a closed space by a body convection preventing member 37 disposed on the upper surface of the inner bottom of the body 21. It does not reach the lower inner surface of the body 21 directly.
[0034]
As apparent from the above configuration, the body convection preventing member 37 can avoid the convection generated in the lower part of the container 23 from directly contacting the lower inner surface of the body 21, thereby reducing the heat generated in the lower part of the body 21. It has the effect | action which can suppress and can further improve heat insulation performance.
[0035]
Further, if it is configured integrally at the lower part of the body 21 as shown in FIG. 10, the same effect can be obtained without increasing the number of parts.
[0036]
(Example 4 )
A fourth embodiment of the present invention will be described below with reference to FIGS. In the figure, the body convection preventing member 37 is arranged on the inner periphery or outer periphery of the vacuum heat insulating material 34. According to this configuration, the thermal resistance between the vacuum heat insulating material 34 and the body convection preventing member 37 is further increased, and the heat radiation due to convection is suppressed.
[0037]
(Example 5 )
The fifth embodiment of the present invention will be described below with reference to FIG. In the figure, a body convection preventing member 37 is arranged adjacent to the inner periphery and the outer periphery of the lower end portion of the vacuum heat insulating material 34. According to this configuration, the lower portion of the container 23 provided with high-temperature components such as the heat shield plate 36 that covers the heating means 26 is further closed to have a function of greatly suppressing heat dissipation due to convection.
[0038]
( Reference Example 6 )
The sixth reference example of the present invention will be described below with reference to FIG. In the figure, a convection prevention wall 38 is formed on the outer periphery of the heat shield plate 36 and the vacuum heat insulating material 34 is adjacent to the heat shield plate 36.
[0039]
Next, the operation of this reference example will be described. The air convection generated between the heating means 26 disposed at the lower part of the container 23 and the heat shield 36 covering it becomes a thermal resistance due to the adjacent part of the convection prevention wall 38 and the vacuum heat insulating material 34 and can suppress the outside outflow. It is.
[0040]
As is apparent from the above configuration, the heat resistance by the convection prevention wall 38 is provided on the outer periphery of the space of the heating means 26 and the heat shield plate 36 to suppress heat radiation.
[0041]
( Reference Example 7 )
The seventh reference example of the present invention will be described below with reference to FIG. In the figure, the convection prevention wall 38 formed on the outer periphery of the heat shield plate 36 and the vacuum heat insulating material 34 are in contact with each other. According to this configuration, the heating means 26 disposed in the lower portion of the container 23, the heat shield 36 and the vacuum heat insulating material 34 covering the heating means 26 are closed spaces, and have an effect of greatly suppressing heat dissipation due to convection.
[0042]
( Reference Example 8 )
The eighth reference example of the present invention will be described below with reference to FIG. In the figure, a plurality of body inner surface ribs 39 adjacent to the vacuum heat insulating material 34 are formed on the inner surface side of the body 21, thereby avoiding surface contact between the vacuum heat insulating material 34 and the inner surface of the body 21, and solid heat. It has the effect | action that the deterioration of the heat insulation effect by conduction can be suppressed to the minimum. In addition, air convection in the circumferential direction is suppressed by the formed body inner rib 39, the vacuum heat insulating material 34, and the air heat insulating isolation layer covered by the inner surface of the body 21, and at the same time, the heat insulating performance can be improved by the air heat insulating effect. Have.
[0043]
( Reference Example 9 )
The ninth reference example of the present invention will be described below with reference to FIG. In the figure, a lip 40 is formed on the outer surface of the waterproof packing 30 and the tip of the lip 40 is brought into contact with the adjacent spout 24. According to this configuration, the heat outflow that occurs at the contact portion (seal portion) between the waterproof packing 30 and the container 23 can be further improved because the lip 40 formed in the waterproof packing 30 becomes a thermal resistance and can be cut off. Has an effect.
[0044]
( Reference Example 10 )
The tenth reference example of the present invention will be described below with reference to FIG. In the figure, the outer peripheral surface of the lid 28 is configured to be positioned below the upper surface of the spout 24. According to this configuration, the heat outflow generated at the contact portion (seal portion) between the waterproof packing 30 and the container 23 is suppressed by the outer peripheral surface of the lid 28 being a thermal resistance at the outer peripheral portion communicating with the outside. It has the effect of further improving the heat insulation performance.
[0045]
【The invention's effect】
As is clear from the above description of the embodiment, according to the description of claim 1, the contact between the waterproof packing and the container is achieved by positioning the upper end of the vacuum heat insulating material above the contact portion between the waterproof packing and the container. Heat dissipation generated on the surface can be greatly suppressed, and the amount of heat insulation can be further reduced.
[0046]
Further, according to the invention described in claim 2, by reducing the thickness only at the upper end portion of the vacuum heat insulating material, the heat insulating performance can be improved without impairing the compactness of the product, and the heat insulation power can be reduced.
[0047]
According to the invention described in claim 3 , since the upper end of the container can be directly insulated by the upper end of the vacuum heat insulating material, the heat insulation performance can be further improved.
[0048]
According to the invention of claim 4 , the body convection preventing member is disposed adjacent to the inner periphery or the outer periphery of the vacuum heat insulating material to further increase the thermal resistance between the body convection preventing member and the lower end of the vacuum heat insulating material. The shielding effect between the high-temperature space at the bottom of the container and the medium-low temperature body can be improved.
[0049]
According to the invention described in claim 5, the lower part of the container generated in the gap between the lower end of the vacuum heat insulating material and the body convection preventing member by adjoining the body convection preventing member on the inner periphery and outer periphery of the lower end of the vacuum heat insulating material. The heat leak from the high temperature space can be suppressed, and the heat insulation performance can be further improved. In addition, since the position of the lower end of the vacuum heat insulating material is regulated, an air layer is generated between the vacuum heat insulating material and the container, or the lower end of the vacuum heat insulating material can come into contact with the body, which can be avoided from factors that deteriorate the heat insulating performance. Is.
[Brief description of the drawings]
[1] The first of the first enlarged sectional view of an electric water heater showing a first reference example of a cross-sectional view of an electric water heater [2] the invention showing a reference example FIG. 3 of the Invention The present invention FIG. 4 is an enlarged cross-sectional view of a main part of an electric water heater showing a second embodiment of the present invention. FIG. 5 is an electric cross-sectional view of an electric water heater showing a third embodiment of the present invention. Fig. 6 is an enlarged cross-sectional view of a main part of a water heater. Fig. 6 is an enlarged cross-sectional view of a main portion of an electric water heater showing a second reference example of the invention. Fig. 7 is an enlarged cross-sectional view of a main part of an electric water heater showing a third reference example of the invention. FIG. 8 is an enlarged cross-sectional view of main parts of an electric water heater showing a fourth reference example of the present invention. FIG. 9 is an enlarged cross-sectional view of main parts of an electric water heater showing a fifth reference example of the present invention. enlarged sectional view of an electric water heater showing a fifth reference example of the invention [11] a fourth invention of Electric kettle showing a fifth embodiment of the fourth exemplary enlarged sectional view of an electric water heater showing an example [13] The present invention of a main part enlarged sectional view of the electric water heater 12 of the present invention showing the施例FIG. 14 is an enlarged cross-sectional view of a main part of an electric water heater showing a sixth reference example of the present invention. FIG. 15 is an enlarged cross-sectional view of a main part of an electric water heater showing a seventh reference example of the invention. 16 is an enlarged cross-sectional view of the main part of an electric water heater showing an eighth reference example of the present invention. FIG. 17 is an enlarged cross-sectional view of the main part of an electric water heater showing a ninth reference example of the present invention. Fig. 19 is an enlarged cross-sectional view of a main part of an electric water heater showing a tenth reference example of the present invention. Fig. 19 is a cross-sectional view showing a conventional electric water heater.
21 Body 22 Liquid 23 Container 24 Spout 26 Heating Means 28 Lid 29 Lid Insulation Material 30 Waterproof Packing 31 Core Material 32 Outer Bag 34 Vacuum Insulation Material 35 Circumferential Rib 35a Inner Peripheral Rib 35b Peripheral Rib 36 Heat Insulation Plate 37 Body Convection Prevention member 38 Convection prevention wall 39 Body inner rib 40 Lip

Claims (5)

液体を収容する有底筒状の容器と、前記容器内の液体を加熱・保温する加熱手段と、前記容器の上方開口部を覆う蓋体と、前記蓋体に装着され前記蓋体閉時に前記容器の上方開口部と当接する防水パッキングと、前記容器の外周部に位置し芯材を外袋で覆い内部を真空状態にした真空断熱材と、前記真空断熱材の外周部に位置するボデーと、前記ボデー上部に載置され前記容器の上方開口部を保持する注口とを有し、前記防水パッキングと前記容器の当接部より上方に前記真空断熱材の上端を位置させたことを特徴とする電気湯沸かし器。 A bottomed cylindrical container for storing a liquid, heating means for heating and keeping the liquid in the container, a lid covering the upper opening of the container, and the lid mounted on the lid and when the lid is closed A waterproof packing that abuts the upper opening of the container, a vacuum heat insulating material that is located on the outer periphery of the container and covers the core material with an outer bag and evacuates the inside, and a body that is positioned on the outer periphery of the vacuum heat insulating material; , wherein mounted on the body upper and a spout for holding the upper opening of the vessel and positions the upper end of the vacuum heat insulating material above the abutment portion of the container and the waterproof packing Electric water heater. 真空断熱材の上端厚さを中央厚さよりも薄くしたことを特徴とする請求項記載の電気湯沸かし器。Electric kettle according to claim 1, wherein the upper end thickness of the vacuum heat insulating material is made thinner than the center thickness. 液体を収容する有底筒状の容器と、前記容器の外周部に位置し芯材を外袋で覆い内部を真空状態にした真空断熱材と、前記容器の上方開口部を保持する注口とを有し、前記真空断熱材の上端を前記容器の外側面と前記注口の内側面との間に配したことを特徴とする電気湯沸かし器。  A bottomed cylindrical container for storing liquid, a vacuum heat insulating material which is located on the outer periphery of the container, covers the core material with an outer bag and evacuates the inside, and a spout for holding the upper opening of the container And an upper end of the vacuum heat insulating material is disposed between the outer side surface of the container and the inner side surface of the spout. 液体を収容する有底筒状の容器と、前記容器の外周部に位置し芯材を外袋で覆い内部を真空状態にした真空断熱材と、前記真空断熱材の外周部に位置するボデーと、前記ボデーの内側底部上面に先端が前記真空断熱材の下端に隣接するボデー対流防止部材とを有し、前記ボデー対流防止部材の先端を前記真空断熱材の内周もしくは外周に隣接して配したことを特徴とする電気湯沸かし器。  A bottomed cylindrical container for containing a liquid, a vacuum heat insulating material located on the outer periphery of the container, covering the core material with an outer bag and evacuating the inside, and a body positioned on the outer peripheral portion of the vacuum heat insulating material; A body convection preventing member having a tip on the upper surface of the inner bottom of the body and adjacent to the lower end of the vacuum heat insulating material, and the tip of the body convection preventing member is disposed adjacent to the inner periphery or outer periphery of the vacuum heat insulating material. Electric water heater characterized by that. ボデー対流防止部材を真空断熱材の下端内周および外周で隣接させたことを特徴とする請求項記載の電気湯沸かし器。The electric water heater according to claim 4, wherein the body convection preventing member is adjacent to the inner periphery and the outer periphery of the lower end of the vacuum heat insulating material.
JP35294199A 1999-12-13 1999-12-13 Electric water heater Expired - Fee Related JP4106837B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35294199A JP4106837B2 (en) 1999-12-13 1999-12-13 Electric water heater

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Application Number Priority Date Filing Date Title
JP35294199A JP4106837B2 (en) 1999-12-13 1999-12-13 Electric water heater

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JP2007269943A Division JP2008029870A (en) 2007-10-17 2007-10-17 Electric kettle

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JP2001161565A JP2001161565A (en) 2001-06-19
JP4106837B2 true JP4106837B2 (en) 2008-06-25

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007037821A (en) * 2005-08-04 2007-02-15 Matsushita Electric Ind Co Ltd Heat insulation apparatus
JP4715885B2 (en) * 2008-08-20 2011-07-06 パナソニック株式会社 Insulation equipment
JP2009101235A (en) * 2009-02-17 2009-05-14 Panasonic Corp Jar pot
CN114645305A (en) * 2020-12-17 2022-06-21 武汉苏泊尔炊具有限公司 Cooking utensil

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