JP3942856B2

JP3942856B2 - refrigerator

Info

Publication number: JP3942856B2
Application number: JP2001312146A
Authority: JP
Inventors: 豊志上迫; 司宅島; 和也樋上; 明中野; 宗登山田
Original assignee: 松下冷機株式会社
Priority date: 2001-10-10
Filing date: 2001-10-10
Publication date: 2007-07-11
Anticipated expiration: 2021-10-10
Also published as: JP2003121064A

Description

【０００１】
【発明の属する技術分野】
本発明は、冷蔵庫開口周縁部の構成に関するものである。
【０００２】
【従来の技術】
冷蔵庫は、食品の種類や保存期間によって分類保存し得るように、冷蔵庫本体の庫内を冷蔵室、冷凍室及び野菜室等に区画しており、その開放前面を単一または複数の扉によって開閉できるように構成されている。また、冷蔵庫本体は庫内を構成する内箱と、外殻を構成する外箱とを嵌合し、これによって内箱と外箱間に形成された空間部に発泡断熱材を充填封入することにより断熱性を確保しており、一方、扉は閉じた状態において、冷蔵庫本体の開放前面に形成されている周縁部に接する内面側に、庫内を密閉するためのパッキンを設けることにより庫内冷気の漏出及び外気の進入を防止している。
【０００３】
しかしながら、上記のような構成の一般的な冷蔵庫の場合、閉じた状態において扉パッキンと接する冷蔵庫本体前面の周縁部は左右側面や後面などと比較して断熱性が悪い上、扉パッキンの気密性能程度では、庫内の冷気の漏出を完全に防止することができないため、常に低温状態にある。このため例えば梅雨時のような高湿度状況下では、扉やその周辺部分に結露を生じて汗をかいたような状態となり、場合によっては結露した水滴が冷蔵庫本体の側面等を伝って流れ落ち、冷蔵庫が設置されている台所等の床を濡らしてしまうといった不具合があった。
【０００４】
このような不具合を改善するために、従来の冷蔵庫としては、特開平８−１３６１１０号公報に示されているように扉や、扉と接する冷蔵庫本体の開放前面側に設けられた周縁部に電気ヒーターを内装し、この電気ヒーターに通電することによって扉やその周辺の冷蔵庫本体側部分の温度低下による結露の発生を防止していた。また、これとは別の方法として、冷蔵庫庫内を冷却する冷凍サイクルにおける高温高圧側パイプを、冷蔵庫本体の前面周縁部に配管することにより、冷却運転時にパイプを通る高温高圧ガスによって前面周縁部の表面温度を上昇させ、結露を防止したものもある。
【０００５】
【発明が解決しようとする課題】
しかし、いずれの場合も冷蔵庫表面の結露は防止できるが、必要以上に前面周縁部を加熱してしまう。このとき、その熱は冷蔵庫の鋼板で成形されている外箱の前面部のフランジから冷蔵庫内に熱が侵入することにより冷却負荷が増大し、圧縮機の運転率の増加・冷却システム効率の低下などに影響し、消費電力量の増加、しいてはエネルギーを非効率に消費している。
【０００６】
本発明は従来の課題を解決するものであり、冷蔵庫庫内への熱侵入負荷を小さくし省エネルギーを図ることを目的とする。また、断熱性能を向上させたことにより冷蔵庫前面周縁部の温度低下を防ぎ冷蔵庫周縁部の温度を上昇させ、結露を防止することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の請求項１に記載の発明は、庫内を構成する内箱と、冷蔵庫の外表面を形成する外箱と、前記内箱と外箱の空間に充填された発泡断熱材と、前記外箱の前面開口縁に内側へ折り曲げた前面フランジと、前面フランジ折り返し部と、前面フランジの裏側に折り返した裏面フランジと、この裏面フランジより連続して形成した第２フランジと、裏面フランジと第２フランジとで形成する内箱挿入部と、第２フランジに連続して形成した第２フランジ延出部とからなる２重フランジ構造を形成している冷蔵庫において、前記２重フランジの形状は内箱に対する投影長さを１５ｍｍ以下とし、前記第２フランジ延出部は冷蔵庫本体上下方向で、冷蔵温度帯に比べ、冷凍温度帯の前記第２フランジの長さを短くするように、冷蔵庫の庫内温度帯により異なる長さに変化させるものであり、第２フランジ延出部が発泡断熱材内で強固に固定されることで、冷蔵庫本体の強度を確保しながら、第２フランジを介して外箱から冷蔵庫庫内側の内箱への熱伝導による熱侵入を低減することができ、消費電力量の低減および外箱前面周縁部の庫内からの冷却作用低減による結露の防止ができる。
また、構造的に強度が必要な部分に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、温度的に熱侵入低減効果が必要な部分に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、冷蔵庫全体の前面開口部の強度を確保しながら、周囲温度との温度差の大きい冷凍温度帯の第２フランジ延出部の長さを短くすることで熱侵入低減効果を高めることができる。
本発明の請求項２に記載の発明は、庫内を構成する内箱と、冷蔵庫の外表面を形成する外箱と、前記内箱と外箱の空間に充填された発泡断熱材と、前記外箱の前面開口縁に内側へ折り曲げた前面フランジと、前面フランジ折り返し部と、前面フランジの裏側に折り返した裏面フランジと、この裏面フランジより連続して形成した第２フランジと、裏面フランジと第２フランジとで形成する内箱挿入部と、第２フランジに連続して形成した第２フランジ延出部とからなる２重フランジ構造を形成している冷蔵庫において、前記２重フランジの形状は内箱に対する投影長さを１５ｍｍ以下とし、前記第２フランジ延出部は冷蔵庫本体上下方向で、引き出し式扉に比べ、ヒンジ式扉の第２フランジ延出部の長さを長くするように、前面開口部に対応する冷蔵庫の扉の開閉形態により異なる長さに変化させるものであり、第２フランジ延出部が発泡断熱材内で強固に固定されることで、冷蔵庫本体の強度を確保しながら、第２フランジを介して外箱から冷蔵庫庫内側の内箱への熱伝導による熱侵入を低減することができ、消費電力量の低減および外箱前面周縁部の庫内からの冷却作用低減による結露の防止ができる。
また、構造的に強度が必要な部分に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、冷蔵庫の扉の支持部を介して前面開口部にかかる荷重に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、前面開口部にかかる荷重が大きくなるヒンジ式扉に対応する前面開口部の第２フランジ延出部の長さを長くすることで、冷蔵庫全体として庫内への熱侵入低減を図りながら強度を確保することができる。
【０００８】
本発明の請求項３に記載の発明は、請求項１または請求項２に記載の発明において、内箱の庫内側表面と２重フランジの最短距離を７ｍｍ以上離すことにより、冷蔵庫本体の強度を確保しながら、確実に２重フランジと外箱の間に断熱材が充填され、２重フランジから内箱への熱伝導による熱侵入をさらに低減できる。とともに外箱前面周縁部の庫内からの冷却作用を低減できる。
【０００９】
本発明の請求項４に記載の発明は、請求項１から請求項３のいずれか一項に記載の発明において、外箱と２重フランジとの空間に放熱用パイプあるいは発汗防止用ヒータを挿入・固定したものであり、発汗防止用の熱源を前面フランジ部に装着した場合においても、発汗防止用の熱が庫内に熱伝導することを低減し、かつ外箱表面の温度を発汗しない程度に高く保つことができ、省エネルギーと結露防止が実現できる。
【００１０】
本発明の請求項５に記載の発明は、請求項１から請求項３のいずれか一項に記載の発明において、裏面フランジに対向して内箱に設けた内箱樋状溝と、裏面フランジと前記内箱樋状溝との空間に放熱用パイプあるいは発汗防止用ヒータを挿入・固定したものであり、発汗防止用の熱源を裏面フランジ部に装着した場合においても、発汗防止用の熱が庫内に熱伝導することを低減し、かつ外箱表面の温度を発汗しない程度に高く保つことができ、省エネルギーと結露防止が実現できる。
【００１１】
本発明の請求項６に記載の発明は、請求項１から請求項５のいずれか一項に記載の発明において、外箱と第２フランジが接する２重フランジ構造を形成しているものであり、第２フランジの内箱挿入部の幅を大きくとれ、内箱挿入が確実となるとともに、第２フランジ延出部の位置を内箱の面から更に離すことが可能となり更なる庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００１２】
本発明の請求項７に記載の発明は、請求項１から請求項６のいずれか一項に記載の発明において、第２フランジ延出部の位置が、前面フランジ折り返し部より庫内側に位置するものであり、第２フランジの内箱挿入部の幅を大きくとれ、内箱挿入が確実となるとともに、前面フランジから庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００１３】
本発明の請求項８に記載の発明は、請求項１から請求項６のいずれか一項に記載の発明において、第２フランジ延出部の位置が、前面フランジ折り返し部より庫外側に位置するものであり、第２フランジ延出部の位置を内箱の面から更に離すことが可能となり更なる庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００１４】
本発明の請求項９に記載の発明は、請求項１から請求項８のいずれか一項に記載の発明において、冷蔵庫本体側面と天面に熱伝導率が０.００４Ｗ/ｍＫ以下の真空断熱材が配設されており、２重フランジ構造の熱侵入低減効果に加え、高性能真空断熱材を適用することにより庫内への熱侵入を更に低減できる。
【００１５】
本発明の請求項１０に記載の発明は、請求項９に記載の発明において、第２フランジ延出部と前記真空断熱材の最短距離が５ｍｍ以上３０ｍｍ以下としたものであり、第２フランジ延出部が真空断熱材と接触、破損することを防止するとともに、真空断熱材の配設効果を高めることができる。
【００１６】
本発明の請求項１１に記載の発明は、請求項９または請求項１０に記載の発明において、第２フランジ延出部が前面開口部の方向に屈曲したものであり、第２フランジの端面が前面開口部の方向に丸められていることにより、真空断熱材配設時の破損を防止できる。
【００１７】
本発明の請求項１２に記載の発明は、請求項９から請求項１１のいずれか一項に記載の発明において、第２フランジ延出部と内箱の間に真空断熱材を延在したものであり、第２フランジから庫内への熱侵入を更に低減できる。
【００１９】
本発明の請求項１３に記載の発明は、請求項１から請求項１２のいずれか一項に記載の発明において、第２フランジ延出部の形状を異なる長さとするとき、線形に変化させるものであり、線形に変化させることにより外箱の第２フランジ延出部の加工方法が簡易になり、設備投資、生産コストを抑えることができる。
【００２４】
本発明の請求項１４に記載の発明は、請求項１から請求項１３のいずれか一項に記載の発明において、第２フランジ延出部の任意の個所にスリットを複数設けることにより伝熱面積減少に伴う熱伝導抑制効果とスリット箇所にウレタンがかみこむことにより強度の向上が図れる。
【００２５】
【発明の実施の形態】
以下、本発明による冷蔵庫の実施の形態について、図面を参照しながら説明する。
【００２６】
（実施の形態１）
図１は、本発明の実施の形態１による冷蔵庫の外観図である。図２は同実施の形態の正面図、図３は、同実施の形態の冷蔵庫前面周縁部要部平面断面図、図４に２重フランジの内箱に対する投影長さと侵入熱量の関係、図５に第２フランジと内箱の間隔による侵入熱量の関係、図６に高温高湿を想定した時の冷蔵庫前面周縁部の表面温度を示す。
【００２７】
図１から図３において、１は冷蔵庫、２は断熱箱体、３、４は冷蔵庫本体を区画する上部仕切体、下部仕切体であり、上部に冷蔵室５、中央部に野菜室６、下部に冷凍室７を区画形成している。８は冷蔵室５の前面開口部にヒンジによって取付けた回転式の冷蔵室扉、９は野菜室６の前面開口部に取付けた引き出し式の野菜室扉、１０は冷凍室７の前面開口部に取付けた引き出し式の冷凍室扉である。
【００２８】
冷蔵庫本体２は冷蔵庫庫内を構成する内箱１１と、外殻を構成する外箱１２とを嵌合し、これによって内箱１１と外箱１２間に形成された空間部１３に発泡断熱材１４を充填封入することにより断熱性を確保している。一方、扉６，７，８は閉じた状態において、断熱箱体２の開放前面周縁部１５に、庫内を密閉するためのパッキンを設けることにより庫内冷気の漏出及び外気の進入を防止している。
【００２９】
内箱１１の作製方法としては、例えばＡＢＳ樹脂の平板を真空成型法によって、所要の箱型状に一体成型する方法がある。樹脂成型品として一体成型された内箱１１にはそれ自体の強度を保つため、外周部全周に亙って溝形状に加工した縁部分が形成されている。すなわち、図３に示すように、内箱１１には開放前面を囲むように周縁部１１ａが形成されている。この前面周縁部１１ａは内箱主壁部１１ｂの前端縁からＬ字状に屈曲するもので、前述のように該主壁部１１ｂとともに内側に開放する内箱樋状溝１１ｃを構成している。
【００３０】
外箱１２は板金材等を曲げ加工して形成されているが、内箱１１と同様に開放前面を囲むように前面フランジ１２ａが形成されている。そして内側に前面フランジ１２ａから連続して前面フランジ折り返し部１２ｂ、前面フランジの裏側に折り返した裏面フランジ１２ｃ、この裏面フランジ１２ｃより連続して形成した第２フランジ１２ｄ、第２フランジ１２ｄに連続して形成した第２フランジ延出部１２ｅを形成している。第２フランジ延出部１２ｅは、箱体の強度を保持するため空間部１３に延出している。そして、裏面フランジ１２ｃと第２フランジ１２ｄとで内箱挿入部１２ｆを形成している。
【００３１】
そして、内箱樋状溝１１ｃが内箱挿入部１２ｆに嵌合され、この嵌合状態において内箱１１と外箱１２間に形成された前記空間部１３に発泡断熱材１４が充填封入されることにより、断熱箱体２が形成されるものである。
【００３２】
ここで、前面フランジ１２ａ、前面フランジ折り返し部１２ｂ、裏面フランジ１２ｃ、第２フランジ１２ｄ、第２フランジ延出部１２ｅで形成される２重フランジ１２ｇの形状の内箱に対する投影長さをａとしている。
【００３３】
また、内箱１１の内箱主壁部１１ｂと２重フランジとの最短距離をｂとしている。
【００３４】
また、第２フランジ延出部１２ｅの位置が、前面フランジ折り返し部１２ｂより庫内側に位置して２重フランジ１２ｇが形成されている。
【００３５】
以上の構成において、２重フランジ１２ｇは内箱１１を外箱１２に取付けるために必要であり、また、冷蔵庫の強度を保つためのものである。しかし、外箱１２は鋼板を用いているものが非常に多く、この材料は熱伝導性が極めて良いため外箱１２の熱を伝え易く、この部分から内箱１１を通り庫内へ移動する熱影響は無視できない。ここで、熱伝導方程式を(数１)に示す。
【００３６】
【数１】

【００３７】
熱負荷Ｑは熱伝導率λと温度差ｄＴ、及び壁厚ｄＸ、伝熱面積Ａで決められる。つまり、第２フランジ１２ｄが内箱１１へ影響を及ぼす面積は重要な要因である。
【００３８】
図４に示すように、２重フランジ１２ｇの内箱主壁部１１ｂに対する投影長さａを減少させれば侵入熱量は低減できる。また、図５に示すように、２重フランジと内箱主壁部１１ｂとの間隔ｂを増加させれば侵入熱量は減少する。
【００３９】
本実施の形態１は、冷蔵庫１の強度を確保出来る範囲で（数１）の要因である第２フランジ１２ｄの長さ、つまり伝熱面積Ａと、内箱主壁部１１ｂと外箱１２の距離ｄＸを規制してやることにより、冷蔵庫１の強度を確保した上で侵入熱量を低減できる。
【００４０】
本実施の形態１のフランジ１２ｇの形状の内箱に対する投影長さａと、内箱１１の内箱主壁部１１ｂと第２フランジの最短距離ｂについての結果を(表１)に示す。
【００４１】
【表１】

【００４２】
本実施の形態では、この外箱１２のフランジ１２ｇから庫内への熱負荷となる内箱１１への熱伝導を抑制するため、前記フランジ１２ｇの特に第２フランジ延出部１２ｅの長さを適正化することにより、冷蔵庫本体２の強度を確保しながら熱侵入による冷却負荷量増大、消費電力量増大を防止すると共に断熱性が向上するため冷蔵庫前面周縁部１５の温度が上昇し結露防止が出来る。図６に高温高湿を想定した、外気温度３０℃、相対湿度８７％、冷蔵室を０℃、冷凍室を−２０℃にした多湿試験における冷蔵庫前面周縁部１５の表面温度を示す。これにより露点温度以上を確保していることがわかる。
【００４３】
また、第２フランジ延出部１２ｅの位置ｃが、前面フランジ折り返し部１２ｂの位置ｄより庫内側に位置させているので、第２フランジの内箱挿入部１２ｆの幅を大きくとれ、内箱挿入が確実となるとともに、前面フランジ１２ａが相対的に庫外側に位置することで前面フランジ１２ａから庫内への熱侵入低減と前面フランジ１２ａの結露防止作用が高まる。
【００４４】
なお、本実施の形態では、前面フランジ１２ａ、前面フランジ折り返し部１２ｂ、裏面フランジ１２ｃ、第２フランジ１２ｄ、第２フランジ延出部１２ｅで形成される２重フランジ１２ｇの形状の内箱に対する投影長さをａとして、ａは１５ｍｍ以下としたが、１０ｍｍ≦ａ≦１５ｍｍとしてもよい。この場合、内箱挿入部１２ｆの奥行き寸法は７〜８ｍｍであり、第２フランジ延出部１２ｅの投影長さは最短２ｍｍ、最長８ｍｍとなる。庫内に最も近く熱影響の大きい第２フランジ延出部１２ｅの投影長さを２〜８ｍｍに設定することで、断熱箱体２の強度を確保したうえで、庫内侵入熱を効率的に低減できる。
【００４５】
また、本実施の形態では、放熱用パイプや発汗防止用ヒータを配設せず、断熱材１４が確実に冷蔵庫前面周縁部１５まで充填されるため、冷蔵庫前面周縁部１５の断熱性が向上する。これは、放熱用パイプや発汗防止用ヒータを外箱１２もしくは内箱１１に固定するための、断熱性能が発泡断熱材１４より１０倍程度も悪いホットメルトなどの固定材を必要としないためである。また、断熱材１４が確実に冷蔵庫前面周縁部１５まで充填されるため箱体の強度も向上するという効果もある。
【００４６】
さらに、放熱用パイプや発汗防止用ヒータ、そしてホットメルトなどの固定材を必要としないので、材料費・工数の削減にも寄与する。
【００４７】
（実施の形態２）
図７は、本発明の実施の形態２による冷蔵庫本体前面周縁部の要部平面断面図である。なお、実施の形態１と同一構成については、同一符号を付して詳細な説明は省略する。
【００４８】
図において、外箱１２と第２フランジ１２ｄとの空間に、放熱用パイプ１６あるいは発汗防止用ヒータ１７を配設している。
【００４９】
以上の構成により、放熱用パイプ１６あるいは発汗防止用ヒータ１７を外箱１２と第２フランジ１２ｄとの空間に配設しているので、外箱１２と前面フランジ１２ａの発汗を確実に防止できるとともに、実施の形態１で説明したフランジ構造により、放熱用パイプ１６あるいは発汗防止用ヒータ１７から冷蔵庫庫内への熱侵入負荷を従来に比べ減少でき、放熱用パイプ１６あるいは発汗防止用ヒータ１７を用いた場合においても発汗を確実に防止したうえで、省エネ化を図ることができる。
【００５０】
（実施の形態３）
図８は、本発明の実施の形態３による冷蔵庫本体前面周縁部の要部平面断面図である。なお、実施の形態１と同一構成については、同一符号を付して詳細な説明は省略する。
【００５１】
図において、外箱１２と第２フランジ１２ｄが接するように２重フランジ１２ｇが成形されている。そして、第２フランジ延出部１２ｅの位置ｅが、前面フランジ折り返し部１２ｂの位置ｆより庫外側に位置している。
【００５２】
以上の構成により、外箱１２と第２フランジ１２ｄが接することにより、第２フランジ１２ｄの内箱挿入部１１ｃの幅を大きくとれ、内箱挿入が確実となるとともに、第２フランジ延出部１２ｅの位置ｅが、前面フランジ折り返し部１２ｂの位置ｆより庫外側に位置することで、第２フランジ延出部１２ｅの位置を内箱１１の面から更に離すことが可能となり、更なる庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００５３】
なお、本実施の形態において、裏面フランジ１２ｃに対向して内箱に設けた内箱樋状溝１１ｃと、裏面フランジ１２ｃと前記内箱樋状溝１１ｃとの空間に放熱用パイプ１８あるいは発汗防止用ヒータ１９を挿入・固定してもよい。この場合内箱１１と外箱１２を組み込む前にあらかじめ内箱樋状溝１１ｃに放熱用パイプ１８あるいは発汗防止用ヒータ１９を固定している。
【００５４】
上記構成により、外箱１２と前面フランジ１２ａの発汗を確実に防止できるとともに、実施の形態１で説明したフランジ構造により、放熱用パイプ１８あるいは発汗防止用ヒータ１９から冷蔵庫庫内への熱侵入負荷を従来に比べ減少でき、放熱用パイプ１８あるいは発汗防止用ヒータ１９を用いた場合においても省エネ化を図ることができる。また、放熱用パイプ１８あるいは発汗防止用ヒータ１９を外箱１２と第２フランジ１２ｄとの空間に配設する場合に比べ、あらかじめ内箱樋状溝１１ｃに組み込むことで、作業性の向上、工数削減が可能となる。
【００５５】
（実施の形態４）
図９は、本発明の実施の形態４による冷蔵庫本体前面周縁部の要部平面断面図である。なお、実施の形態１と同一構成部分については、詳細な説明は省略し、異なる部分のみ説明する。
【００５６】
図において、２０は真空断熱材であり、ガス透過を阻止する多層ラミネートフィルムの周囲を溶着した袋内にシリカ、パーライトなどの微粉末、あるいはグラスファイバ、連続気泡の発泡ウレタンなどからなる断熱材を挿入した後、袋内のガスを排気し真空状態として密封したものである。硬質ウレタンフォームである発泡断熱材１４よりも概ね１０倍程度の断熱性能を有し、熱伝導率が０.００４Ｗ/ｍＫ以下の真空断熱材２０を外箱１２もしくは内箱１１側面にホットメルトなどの固定部材で貼付後、硬質ウレタンフォームを発泡充填している。
【００５７】
そして、２重フランジ１２ｇの第２フランジ延出部１２ｅの端面と真空断熱材２０との最短距離ｇは５ｍｍ以上３０ｍｍ以下としている。また、第２フランジ延出部１２ｅの端面と真空断熱材２０の奥行き方向の端面との距離ｈ、および第２フランジ延出部１２ｅの端面と真空断熱材２０の厚み方向の端面との距離ｉは、それぞれ、ｈ＞０、ｉ＞０としている。つまり真空断熱材２０の投影面と第２フランジ延出部１２ｅの端面とは重なり合わないようにしている。
【００５８】
以上の構成により、前述した２重フランジ構造の熱侵入低減効果に加え、高性能真空断熱材を適用することにより庫内への熱侵入を更に低減できる。とともに熱交換量が少なくなるため外箱１２表面温度が上昇し、外箱１２側面及び熱伝導により冷蔵庫前面周縁部１５の結露防止ができる。
【００５９】
そして、第２フランジ延出部１２ｅの端面と真空断熱材２０との最短距離ｇは５ｍｍ以上としているので、真空断熱材２０の貼付時、あるいは組み込み後、製造工法の安全と真空断熱材による吸熱量低減の効果を最大限発揮しながら、真空断熱材２１の破損防止ができる。つまり、第２フランジ延出部１２ｅが真空断熱材２０と接触、破損することを防止でき、信頼性を高めることができる。さらに、真空断熱材２０の投影面と第２フランジ延出部１２ｅの端面とは重なり合わないようにしているので、第２フランジ延出部１２ｅが真空断熱材２０と接触、破損することを更に防止でき、真空断熱材２０の信頼性をいっそう高めることができる。また、第２フランジ延出部１２ｅの端面と真空断熱材２０との最短距離ｇは３０ｍｍ以下としているので、真空断熱材２０を２重フランジ１２ｇの近傍まで配置でき、断熱性能の向上を図ることができる。
【００６０】
（実施の形態５）
図１０は、本発明の実施の形態５による冷蔵庫本体前面周縁部の要部平面断面図である。なお、実施の形態４と同一構成部分については、詳細な説明は省略し、異なる部分のみ説明する。
【００６１】
図において、第２フランジ延出部１２ｅの端面を前面開口部の方向に屈曲したものであり、第２フランジ延出部１２ｅの端面が前面開口部の方向に丸められていることにより、真空断熱材２０組み込み時、たとえ第２フランジ延出部１２ｅの端面に接触等しても面での接触に収まり、真空断熱材２０の破損を防止できる。
【００６２】
（実施の形態６）
図１１は、本発明の実施の形態６による冷蔵庫本体前面周縁部の要部平面断面図である。なお、実施の形態４と同一構成部分については、詳細な説明は省略し、異なる部分のみ説明する。
【００６３】
図において、２１は真空断熱材で、第２フランジ延出部１２ｅと内箱１１の間に真空断熱材２１を延在させている。これにより、外箱１２外表面の熱が２重フランジ１２ｇを伝い第２フランジ延出部１２ｅから内箱１１へ伝わる熱移動を、断熱性能の高い真空断熱材２１で断熱でき、省エネを図ることができるとともに、外箱１２や前面フランジ１２ａの温度低下を防止でき、発汗を防止できる。
【００６４】
（実施の形態７）
図１２から図１４は、本発明の実施の形態７による外箱１２の斜面図である。なお、実施の形態１と同一構成については、同一符号を付して詳細な説明は省略する。
【００６５】
近年の冷蔵庫では、冷蔵室５の扉８に食品・飲料水等を収納するための扉棚が設置されており、この収納量は非常に大きくなっており、その荷重に対する強度が必要とされる。そのために、冷蔵庫の強度を高める１つの手段として外箱１２の第２フランジ延出部１２ｅを長くして、発泡ウレタンとの密着性を高め箱体の強度を高める方法がある。しかし、その一方、省エネルギーの観点から２重フランジ１２ｇからの熱侵入防止も必要である。
【００６６】
そこで、本実施の形態では、第２フランジ延出部１２ｅの形状は冷蔵庫本体上下方向で異なる長さとしたものであり、第２フランジ延出部１２ｅの形状を異なる長さとするとき、線形に変化させている。
【００６７】
以上の構成により、上部に比較的高い温度帯である冷蔵室５が区画され、比較的低い温度帯である冷凍室７は下部に区画されている冷蔵庫において、上部の冷蔵室５は、両サイドのどちらかもしくは両方に扉８を支えるためのヒンジ機構（図示せず）が存在し、そこに扉に収納した食品の荷重がかかり冷蔵庫本体２を変形させようとする。
【００６８】
しかし、第２フランジ延出部１２ｅの長さを上部から下部へ減少するように線形的に変形させ、外気と庫内温度差が比較的付きにくい冷蔵室５や野菜室６の第２フランジ延出部１２ｅは長く保つことにより強度を保持し、外気と庫内温度の差が付き易い冷凍室７側面の第２フランジ延出部１２ｅは短くすることにより侵入熱量を低減すると共に強度も保持する。また、線形に変化させることにより外箱の第２フランジ延出部の加工方法が簡易になり、設備投資、生産コストを抑えることができる。
【００６９】
なお、図１３に示すように、第２フランジ延出部１２ｅの長さを中間の任意の点２２で変えてもよい。
【００７０】
中間の任意の点２２で変える形態として、冷蔵庫１の庫内温度帯の境界部分、たとえば上部仕切体３や下部仕切体４と接する部分で変化させることが望ましい。これにより、温度的に熱侵入低減効果が必要な部分に応じて、第２フランジ延出部１２ｅの長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。そして、より具体的には冷蔵温度帯に比べ、冷凍温度帯の第２フランジ延出部１２ｅの長さを短くする構造が望ましい。これにより、冷蔵庫全体の前面開口部の強度を確保しながら、周囲温度との温度差の大きい冷凍温度帯の第２フランジ延出部１２ｅの長さを短くすることで熱侵入低減効果を高めることができる。
【００７１】
また、中間の任意の点２２で変える他の形態として、前面開口部に対応する冷蔵庫の扉の開閉形態の境界部分、たとえば上部仕切体３と接する部分で変化させることが望ましい。これにより、冷蔵庫の扉の支持部を介して前面開口部にかかる荷重に応じて、第２フランジ延出部１２ｅの長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。そして、より具体的には引き出し式扉に比べ、ヒンジ式扉の第２フランジ延出部１２ｅの長さを長くする構造が望ましい。これにより、前面開口部にかかる荷重が大きくなるヒンジ式扉に対応する前面開口部の第２フランジ延出部１２ｅの長さを長くすることで、冷蔵庫全体として庫内への熱侵入低減を図りながら強度を確保することができる。
【００７２】
また、図１４に示すように、第２フランジ延出部１２ｅの任意の個所にスリット２３を複数設けることにより、第２フランジ延出部１２ｅの熱伝導面積が減り、庫内への熱侵入を低減できる。そして、断熱材１４が第２フランジ面に接着する面積が増えることにより冷蔵庫箱体の強度の向上が図れる。
【００７３】
【発明の効果】
以上説明したように、請求項１に記載の発明は、庫内を構成する内箱と、冷蔵庫の外表面を形成する外箱と、前記内箱と外箱の空間に充填された発泡断熱材と、前記外箱の前面開口縁に内側へ折り曲げた前面フランジと、前面フランジ折り返し部と、前面フランジの裏側に折り返した裏面フランジと、この裏面フランジより連続して形成した第２フランジと、裏面フランジと第２フランジとで形成する内箱挿入部と、第２フランジに連続して形成した第２フランジ延出部とからなる２重フランジ構造を形成している冷蔵庫において、前記２重フランジの形状は内箱に対する投影長さを１５ｍｍ以下とし、前記第２フランジ延出部は冷蔵庫本体上下方向で、冷蔵温度帯に比べ、冷凍温度帯の前記第２フランジの長さを短くするように、冷蔵庫の庫内温度帯により異なる長さに変化させるものであり、第２フランジ延出部が発泡断熱材内で強固に固定されることで、冷蔵庫本体の強度を確保しながら、第２フランジを介して外箱から冷蔵庫庫内側の内箱への熱伝導による熱侵入を低減することができ、消費電力量の低減および外箱前面周縁部の庫内からの冷却作用低減による結露の防止ができる。
また、構造的に強度が必要な部分に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、温度的に熱侵入低減効果が必要な部分に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、冷蔵庫全体の前面開口部の強度を確保しながら、周囲温度との温度差の大きい冷凍温度帯の第２フランジ延出部の長さを短くすることで熱侵入低減効果を高めることができる。
また、請求項２に記載の発明は、庫内を構成する内箱と、冷蔵庫の外表面を形成する外箱と、前記内箱と外箱の空間に充填された発泡断熱材と、前記外箱の前面開口縁に内側へ折り曲げた前面フランジと、前面フランジ折り返し部と、前面フランジの裏側に折り返した裏面フランジと、この裏面フランジより連続して形成した第２フランジと、裏面フランジと第２フランジとで形成する内箱挿入部と、第２フランジに連続して形成した第２フランジ延出部とからなる２重フランジ構造を形成している冷蔵庫において、前記２重フランジの形状は内箱に対する投影長さを１５ｍｍ以下とし、前記第２フランジ延出部は冷蔵庫本体上下方向で、引き出し式扉に比べ、ヒンジ式扉の第２フランジ延出部の長さを長くするように、前面開口部に対応する冷蔵庫の扉の開閉形態により異なる長さに変化させるものであり、第２フランジ延出部が発泡断熱材内で強固に固定されることで、冷蔵庫本体の強度を確保しながら、第２フランジを介して外箱から冷蔵庫庫内側の内箱への熱伝導による熱侵入を低減することができ、消費電力量の低減および外箱前面周縁部の庫内からの冷却作用低減による結露の防止ができる。
また、構造的に強度が必要な部分に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、冷蔵庫の扉の支持部を介して前面開口部にかかる荷重に応じて、第２フランジ延出部の長さを設定でき、強度と庫内への熱侵入低減を両立しながら自由度の高い設計が可能となる。
また、前面開口部にかかる荷重が大きくなるヒンジ式扉に対応する前面開口部の第２フランジ延出部の長さを長くすることで、冷蔵庫全体として庫内への熱侵入低減を図りながら強度を確保することができる。
【００７４】
また、請求項３に記載の発明は、請求項１または請求項２に記載の発明において、内箱の庫内側表面と２重フランジの最短距離を７ｍｍ以上離すことにより、冷蔵庫本体の強度を確保しながら、確実に２重フランジと外箱の間に断熱材が充填され、２重フランジから内箱への熱伝導による熱侵入をさらに低減できる。とともに外箱前面周縁部の庫内からの冷却作用を低減できる。
【００７５】
また、請求項４に記載の発明は、請求項１から請求項３のいずれか一項に記載の発明において、外箱と２重フランジとの空間に放熱用パイプあるいは発汗防止用ヒータを挿入・固定したものであり、発汗防止用の熱源を前面フランジ部に装着した場合においても、発汗防止用の熱が庫内に熱伝導することを低減し、かつ外箱表面の温度を発汗しない程度に高く保つことができ、省エネルギーと結露防止が実現できる。
【００７６】
また、請求項５に記載の発明は、請求項１から請求項３のいずれか一項に記載の発明において、裏面フランジに対向して内箱に設けた内箱樋状溝と、裏面フランジと前記内箱樋状溝との空間に放熱用パイプあるいは発汗防止用ヒータを挿入・固定したものであり、発汗防止用の熱源を裏面フランジ部に装着した場合においても、発汗防止用の熱が庫内に熱伝導することを低減し、かつ外箱表面の温度を発汗しない程度に高く保つことができ、省エネルギーと結露防止が実現できる。
【００７７】
また、請求項６に記載の発明は、請求項１から請求項３のいずれか一項に記載の発明において、外箱と第２フランジが接する２重フランジ構造を形成しているものであり、第２フランジの内箱挿入部の幅を大きくとれ、内箱挿入が確実となるとともに、第２フランジ延出部の位置を内箱の面から更に離すことが可能となり更なる庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００７８】
また、請求項７に記載の発明は、請求項１から請求項６のいずれか一項に記載の発明において、第２フランジ延出部の位置が、前面フランジ折り返し部より庫内側に位置するものであり、第２フランジの内箱挿入部の幅を大きくとれ、内箱挿入が確実となるとともに、前面フランジから庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００７９】
また、請求項８に記載の発明は、請求項１から請求項６のいずれか一項に記載の発明において、第２フランジ延出部の位置が、前面フランジ折り返し部より庫外側に位置するものであり、第２フランジ延出部の位置を内箱の面から更に離すことが可能となり更なる庫内への熱侵入低減と前面フランジの結露防止作用が高まる。
【００８０】
また、請求項９に記載の発明は、請求項１から請求項８のいずれか一項に記載の発明において、冷蔵庫本体側面と天面に熱伝導率が０.００４Ｗ/ｍＫ以下の真空断熱材が配設されており、２重フランジ構造の熱侵入低減効果に加え、高性能真空断熱材を適用することにより庫内への熱侵入を更に低減できる。
【００８１】
また、請求項１０に記載の発明は、請求項９に記載の発明において、第２フランジ延出部と前記真空断熱材の最短距離が５ｍｍ以上３０ｍｍ以下としたものであり、第２フランジ延出部が真空断熱材と接触、破損することを防止するとともに、真空断熱材の配設効果を高めることができる。
【００８２】
また、請求項１１に記載の発明は、請求項９または請求項１０に記載の発明において、第２フランジ延出部が前面開口部の方向に屈曲したものであり、第２フランジの端面が前面開口部の方向に丸められていることにより、真空断熱材配設時の破損を防止できる。
【００８３】
また、請求項１２に記載の発明は、請求項９から請求項１１のいずれか一項に記載の発明において、第２フランジ延出部と内箱の間に真空断熱材を延在したものであり、第２フランジから庫内への熱侵入を更に低減できる。
【００８５】
また、請求項１３に記載の発明は、請求項１から請求項１２のいずれか一項に記載の発明において、第２フランジ延出部の形状を異なる長さとするとき、線形に変化させるものであり、線形に変化させることにより外箱の第２フランジ延出部の加工方法が簡易になり、設備投資、生産コストを抑えることができる。
【００９０】
また、請求項１４に記載の発明は、請求項１から請求項１３のいずれか一項に記載の発明において、第２フランジ延出部の任意の個所にスリットを複数設けることにより伝熱面積減少に伴う熱伝導抑制効果とスリット箇所にウレタンがかみこむことにより強度の向上が図れる。
【図面の簡単な説明】
【図１】本発明による冷蔵庫の実施の形態１の外観図
【図２】同実施の形態の冷蔵庫の正面図
【図３】同実施の形態の冷蔵庫の冷蔵庫前面周縁部要部平面断面図
【図４】同実施の形態の冷蔵庫の２重フランジの内箱に対する投影長さと侵入熱量の関係を示す特性図
【図５】同実施の形態の冷蔵庫の第２フランジと内箱からの距離と侵入熱量の関係を示す特性図
【図６】同実施の形態の冷蔵庫の高温高湿を想定した時の冷蔵庫前面周縁部の表面温度を示す図
【図７】本発明による実施の形態２の冷蔵庫の前面周縁部要部平面断面図
【図８】本発明による実施の形態３の冷蔵庫の前面周縁部要部平面断面図
【図９】本発明による実施の形態４の冷蔵庫の前面周縁部要部平面断面図
【図１０】本発明による実施の形態５の冷蔵庫の前面周縁部要部平面断面図
【図１１】本発明による実施の形態６の冷蔵庫の前面周縁部要部平面断面図
【図１２】本発明による実施の形態７の冷蔵庫の外箱の斜視図
【図１３】同実施の形態の冷蔵庫の他の外箱の斜視図
【図１４】同実施の形態の冷蔵庫の他の外箱の斜視図
【符号の説明】
１冷蔵庫
２断熱箱体
５冷蔵室
６野菜室
７冷凍室
８冷蔵室扉
９野菜室扉
１０冷凍室扉
１１内箱
１１ｃ内箱樋状溝
１２外箱
１２ａ前面フランジ
１２ｂ前面フランジ折り返し部
１２ｃ裏面フランジ
１２ｄ第２フランジ
１２ｅ第２フランジ延出部
１２ｆ内箱挿入部
１２ｇ２重フランジ
１４発泡断熱材
１５前面周縁部
１６、１８放熱用パイプ
１７、１９発汗防止用ヒータ
２０、２１真空断熱材
２３スリット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the configuration of the peripheral edge of the refrigerator opening.
[0002]
[Prior art]
The refrigerator is divided into a refrigerator room, a freezer room, a vegetable room, etc. so that it can be classified and stored according to the type of food and the storage period, and the front of the refrigerator is opened and closed with single or multiple doors. It is configured to be able to. In addition, the refrigerator main body fits the inner box constituting the interior of the refrigerator and the outer box constituting the outer shell, thereby filling and enclosing the foamed heat insulating material in the space formed between the inner box and the outer box. By providing a packing for sealing the inside of the refrigerator on the inner surface side in contact with the peripheral edge formed on the open front surface of the refrigerator main body while the door is closed, Prevents cold air leaks and outside air from entering.
[0003]
However, in the case of a general refrigerator configured as described above, the peripheral portion of the front surface of the refrigerator main body that is in contact with the door packing in a closed state has poor heat insulation compared to the left and right side surfaces and the rear surface, and the air tightness of the door packing. In order to prevent the leakage of cold air in the cabinet, the temperature is always low. For this reason, for example, under high humidity conditions such as during the rainy season, the door and its surroundings are condensing and sweating, and in some cases, the condensed water drops flow down the side of the refrigerator body, There was a problem that the floor of the kitchen etc. where the refrigerator is installed gets wet.
[0004]
In order to improve such a problem, as a conventional refrigerator, as disclosed in Japanese Patent Application Laid-Open No. 8-136110, the door and the peripheral portion provided on the open front side of the refrigerator main body in contact with the door are electrically connected. A heater was built in and the electric heater was energized to prevent dew condensation due to a temperature drop in the door and the surrounding refrigerator body side. In addition, as a method different from this, by connecting the high-temperature high-pressure side pipe in the refrigeration cycle for cooling the inside of the refrigerator cabinet to the front peripheral edge of the refrigerator body, the front peripheral edge by the high-temperature high-pressure gas passing through the pipe during cooling operation Some have raised the surface temperature of the water to prevent condensation.
[0005]
[Problems to be solved by the invention]
However, in any case, condensation on the refrigerator surface can be prevented, but the front peripheral edge is heated more than necessary. At this time, the heat enters the refrigerator from the front flange of the outer box formed of the steel plate of the refrigerator, so that the cooling load increases, the compressor operation rate increases, and the cooling system efficiency decreases. The power consumption increases, and energy is consumed inefficiently.
[0006]
This invention solves the conventional subject, and it aims at reducing the heat | fever penetration | invasion load in a refrigerator cabinet, and aiming at energy saving. Moreover, it aims at preventing the temperature fall of a refrigerator front peripheral part by raising the heat insulation performance, raising the temperature of a refrigerator peripheral part, and preventing dew condensation.
[0007]
[Means for Solving the Problems]
  The invention according to claim 1 of the present invention includes an inner box constituting the inside of the cabinet, an outer box forming the outer surface of the refrigerator, a foam heat insulating material filled in the space between the inner box and the outer box, A front flange that is folded inward at the front opening edge of the outer box, a front flange folded portion, a back flange that is folded back to the back side of the front flange, a second flange that is formed continuously from the back flange, In the refrigerator having a double flange structure including an inner box insertion portion formed by two flanges and a second flange extending portion formed continuously with the second flange, the shape of the double flange is the inner The projection length on the box is 15mm or less.The second flange extension portion is vertically changed in the refrigerator main body, and the length of the second flange in the refrigeration temperature zone is shorter than the refrigeration temperature zone, so that the length varies depending on the refrigerator temperature zone. MakeThe second flange extending part is firmly fixed in the foam heat insulating material, so that the strength of the refrigerator main body is secured and the outer box is connected to the inner box inside the refrigerator cabinet via the second flange. Heat intrusion due to heat conduction can be reduced, and the amount of power consumption can be reduced and condensation can be prevented by reducing the cooling effect from the inside of the front peripheral edge of the outer box.
In addition, the length of the second flange extending portion can be set according to the portion where the strength is structurally required, and a design with a high degree of freedom is possible while achieving both strength and reduced heat penetration into the interior.
In addition, the length of the second flange extension can be set according to the part that requires a heat penetration reduction effect in terms of temperature, allowing for a high degree of freedom while achieving both strength and reduced heat penetration into the cabinet. It becomes.
Moreover, the heat penetration reduction effect can be enhanced by shortening the length of the second flange extending portion in the freezing temperature zone having a large temperature difference from the ambient temperature while ensuring the strength of the front opening of the entire refrigerator. .
The invention according to claim 2 of the present invention includes an inner box constituting the interior of the cabinet, an outer box forming the outer surface of the refrigerator, a foam heat insulating material filled in the space between the inner box and the outer box, A front flange folded inward at the front opening edge of the outer box, a front flange folded portion, a back flange folded back to the back side of the front flange, a second flange formed continuously from the back flange, a back flange and a first flange In the refrigerator having a double flange structure including an inner box insertion portion formed by two flanges and a second flange extending portion formed continuously with the second flange, the shape of the double flange is the inner The projection length to the box is 15 mm or less, and the second flange extension is in the vertical direction of the refrigerator body, and the length of the second flange extension of the hinged door is longer than that of the drawer door. Compatible with openings The length of the second flange extending portion is firmly fixed in the foam heat insulating material so that the strength of the refrigerator body is secured while the second flange is secured. The heat intrusion due to heat conduction from the outer box to the inner box inside the refrigerator cabinet can be reduced through this, reducing the power consumption and preventing the condensation by reducing the cooling effect from the inside of the outer peripheral edge of the outer box. it can.
In addition, the length of the second flange extending portion can be set according to the portion where the strength is structurally required, and a design with a high degree of freedom is possible while achieving both strength and reduced heat penetration into the interior.
In addition, the length of the second flange extension can be set according to the load applied to the front opening through the support part of the refrigerator door, and the degree of freedom can be achieved while achieving both strength and reduced heat penetration into the cabinet. High design is possible.
In addition, by increasing the length of the second flange extension part of the front opening corresponding to the hinged door where the load applied to the front opening increases, the strength of the refrigerator as a whole is reduced while reducing heat penetration. Can be secured.
[0008]
  Of the present inventionClaim 3The invention described inClaim 1 or claim 2In the invention described in, by keeping the shortest distance of 7 mm or more between the inner surface of the inner box and the double flange at least 7 mm, the heat insulation material is reliably filled between the double flange and the outer box while ensuring the strength of the refrigerator body. In addition, heat intrusion from the double flange to the inner box due to heat conduction can be further reduced. Moreover, the cooling effect | action from the store | warehouse | chamber of the outer case front peripheral part can be reduced.
[0009]
  Of the present inventionClaim 4The invention described inAny one of Claim 1 to Claim 3In the invention described in the above, even when a heat radiating pipe or a sweating prevention heater is inserted and fixed in the space between the outer box and the double flange and a heat source for sweating is attached to the front flange part, It is possible to reduce heat conduction for preventing heat from being transferred into the cabinet, and to keep the temperature of the outer box surface high enough not to sweat, thereby realizing energy saving and prevention of condensation.
[0010]
  Of the present inventionClaim 5The invention described inAny one of Claim 1 to Claim 3In the invention described in the above, a heat dissipating pipe or a sweating prevention heater is inserted and fixed in the space between the inner box bowl-shaped groove provided in the inner box facing the rear flange and the rear flange and the inner box bowl-shaped groove. Even when a heat source for preventing sweating is attached to the back flange, the heat for preventing sweating is reduced from being conducted into the cabinet, and the temperature of the outer box surface is kept high enough not to sweat. Energy saving and prevention of condensation.
[0011]
  Of the present inventionClaim 6The invention described inAny one of Claims 1-5In the invention described in the above, a double flange structure is formed in which the outer box and the second flange are in contact with each other, the width of the inner box insertion portion of the second flange can be increased, and insertion of the inner box is ensured, The position of the second flange extending portion can be further separated from the surface of the inner box, and further reduction of heat penetration into the warehouse and prevention of dew condensation on the front flange are enhanced.
[0012]
  Of the present inventionClaim 7The invention described inAny one of Claims 1-6The position of the second flange extending part is located on the inner side of the front flange folded part, the width of the inner box inserting part of the second flange can be increased, and the inner box insertion is ensured. At the same time, the heat penetration reduction from the front flange into the cabinet and the anti-condensation effect of the front flange are enhanced.
[0013]
  Of the present inventionClaim 8The invention described inAny one of Claims 1-6The position of the second flange extending part is located outside the front flange folded part, and the position of the second flange extending part can be further separated from the surface of the inner box. Further reduction of heat penetration into the cabinet and prevention of condensation on the front flange are enhanced.
[0014]
  Of the present inventionClaim 9The invention described inAny one of Claims 1-8.In the invention described in the above, a vacuum heat insulating material having a thermal conductivity of 0.004 W / mK or less is disposed on the side surface and the top surface of the refrigerator body, and in addition to the effect of reducing the heat penetration of the double flange structure, a high performance vacuum heat insulating material By applying the material, it is possible to further reduce the heat intrusion into the warehouse.
[0015]
  Of the present inventionClaim 10The invention described inClaim 9The shortest distance between the second flange extension part and the vacuum heat insulating material is 5 mm or more and 30 mm or less, and the second flange extension part is prevented from coming into contact with or being damaged by the vacuum heat insulating material. At the same time, the arrangement effect of the vacuum heat insulating material can be enhanced.
[0016]
  Of the present inventionClaim 11The invention described inClaim 9 or Claim 10The second flange extending portion is bent in the direction of the front opening, and the end surface of the second flange is rounded in the direction of the front opening so that the vacuum heat insulating material is disposed. Can be prevented from being damaged.
[0017]
  Of the present inventionClaim 12The invention described inAny one of Claims 9 to 11In the invention described in (2), a vacuum heat insulating material is extended between the second flange extending portion and the inner box, and heat penetration from the second flange into the cabinet can be further reduced.
[0019]
  The invention according to claim 13 of the present invention providesAny one of Claims 1-12In the invention described in the above, when the shape of the second flange extending portion is set to different lengths, the second flange extending portion is linearly changed. By changing the shape linearly, the processing method of the second flange extending portion of the outer box is simplified. Thus, capital investment and production costs can be reduced.
[0024]
  Of the present inventionClaim 14The invention described in14. Any one of claims 1 to 13.In the invention described in 1), by providing a plurality of slits at arbitrary locations of the second flange extending portion, it is possible to improve the strength by suppressing the heat conduction due to the reduction of the heat transfer area and by the urethane biting into the slit locations.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings.
[0026]
(Embodiment 1)
FIG. 1 is an external view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a front view of the embodiment, FIG. 3 is a plan sectional view of the essential part of the refrigerator front peripheral portion of the embodiment, FIG. 4 shows the relationship between the projected length of the double flange on the inner box and the amount of intrusion heat, FIG. Fig. 6 shows the relationship between the intrusion heat quantity due to the distance between the second flange and the inner box, and Fig. 6 shows the surface temperature of the front edge of the refrigerator when high temperature and high humidity are assumed.
[0027]
1 to 3, 1 is a refrigerator, 2 is a heat insulating box, 3 and 4 are an upper partition and a lower partition that divide the refrigerator main body, the refrigerator compartment 5 in the upper part, the vegetable compartment 6 in the central part, the lower part The freezer compartment 7 is partitioned. 8 is a rotary refrigerator door attached to the front opening of the refrigerator compartment 5 by a hinge, 9 is a pull-out vegetable compartment door attached to the front opening of the

vegetable compartment

6, and 10 is a front opening of the freezer compartment 7. It is an attached drawer-type freezer compartment door.
[0028]
The refrigerator main body 2 is fitted with an inner box 11 constituting the inside of the refrigerator cabinet and an outer box 12 constituting the outer shell, whereby a foam insulation is formed in the space 13 formed between the inner box 11 and the outer box 12. 14 is filled and sealed to ensure heat insulation. On the other hand, with the

doors

6, 7, and 8 closed, a packing for sealing the inside of the cabinet is provided at the open front peripheral edge 15 of the heat insulation box 2, thereby preventing the cool air inside the cabinet from leaking and the outside air from entering. ing.
[0029]
As a method for producing the inner box 11, for example, there is a method of integrally molding a flat plate of ABS resin into a required box shape by a vacuum forming method. In order to maintain the strength of the inner box 11 integrally molded as a resin molded product, an edge portion processed into a groove shape is formed over the entire outer periphery. That is, as shown in FIG. 3, the inner box 11 is formed with a peripheral edge portion 11a so as to surround the open front surface. The front peripheral edge portion 11a is bent in an L shape from the front end edge of the inner box main wall portion 11b, and forms the inner box flange-like groove 11c that opens inward with the main wall portion 11b as described above. .
[0030]
Although the outer box 12 is formed by bending a sheet metal material or the like, a front flange 12a is formed so as to surround the open front surface similarly to the inner box 11. Then, the front flange 12a continuously from the front flange 12a on the inside, the back flange 12c folded back to the back side of the front flange, the second flange 12d formed continuously from the back flange 12c, and the second flange 12d. The formed second flange extending portion 12e is formed. The second flange extending portion 12e extends to the space portion 13 in order to maintain the strength of the box. The back flange 12c and the second flange 12d form an inner box insertion portion 12f.
[0031]
Then, the inner box flange-shaped groove 11c is fitted into the inner box insertion portion 12f, and the foamed heat insulating material 14 is filled and enclosed in the space 13 formed between the inner box 11 and the outer box 12 in this fitted state. Thereby, the heat insulation box 2 is formed.
[0032]
Here, the projected length of the double flange 12g formed by the front flange 12a, the front flange folded portion 12b, the back flange 12c, the second flange 12d, and the second flange extension portion 12e is a. .
[0033]
Further, the shortest distance between the inner box main wall portion 11b of the inner box 11 and the double flange is b.
[0034]
Moreover, the position of the 2nd flange extension part 12e is located inside the store | warehouse | chamber from the front flange return part 12b, and the double flange 12g is formed.
[0035]
In the above configuration, the double flange 12g is necessary for attaching the inner box 11 to the outer box 12, and is for maintaining the strength of the refrigerator. However, the outer box 12 is often made of a steel plate, and since this material has extremely good thermal conductivity, it is easy to transfer the heat of the outer box 12, and heat that moves from this portion to the interior through the inner box 11. The impact cannot be ignored. Here, the heat conduction equation is shown in (Equation 1).
[0036]
[Expression 1]

[0037]
The thermal load Q is determined by the thermal conductivity λ, temperature difference dT, wall thickness dX, and heat transfer area A. That is, the area where the second flange 12d affects the inner box 11 is an important factor.
[0038]
As shown in FIG. 4, the amount of intrusion heat can be reduced if the projection length a of the double flange 12g with respect to the inner box main wall portion 11b is reduced. Further, as shown in FIG. 5, the amount of intrusion heat decreases if the distance b between the double flange and the inner box main wall 11b is increased.
[0039]
In the first embodiment, the length of the second flange 12d that is a factor of (Equation 1) within the range in which the strength of the refrigerator 1 can be secured, that is, the heat transfer area A, the inner box main wall 11b, and the outer box 12 By restricting the distance dX, the amount of intrusion heat can be reduced while ensuring the strength of the refrigerator 1.
[0040]
Table 1 shows the results of the projection length a for the inner box of the shape of the flange 12g of the first embodiment and the shortest distance b between the inner box main wall portion 11b of the inner box 11 and the second flange.
[0041]
[Table 1]

[0042]
In the present embodiment, in order to suppress heat conduction from the flange 12g of the outer box 12 to the inner box 11 as a heat load into the interior, the length of the flange 12g, in particular, the second flange extending portion 12e is set to be long. By optimizing, while ensuring the strength of the refrigerator body 2, it prevents the increase of the cooling load and power consumption due to heat intrusion, and also improves the heat insulation, so that the temperature of the front peripheral edge 15 of the refrigerator rises to prevent condensation. I can do it. FIG. 6 shows the surface temperature of the front peripheral edge 15 of the refrigerator in a high humidity test assuming a high temperature and high humidity in which the outside air temperature is 30 ° C., the relative humidity is 87%, the refrigerator compartment is 0 ° C., and the freezer compartment is −20 ° C. This shows that the dew point temperature or more is secured.
[0043]
In addition, since the position c of the second flange extending portion 12e is positioned on the inner side of the chamber than the position d of the front flange folded portion 12b, the width of the inner box inserting portion 12f of the second flange can be increased, and the inner box is inserted. Is ensured, and the front flange 12a is positioned relatively outside the storage, thereby reducing the heat penetration from the front flange 12a into the storage and preventing the condensation of the front flange 12a.
[0044]
In the present embodiment, the projection length to the inner box in the shape of the double flange 12g formed by the front flange 12a, the front flange folded portion 12b, the back flange 12c, the second flange 12d, and the second flange extending portion 12e. The thickness a is set to 15 mm or less, but may be set to 10 mm ≦ a ≦ 15 mm. In this case, the depth dimension of the inner box insertion portion 12f is 7 to 8 mm, and the projection length of the second flange extension portion 12e is 2 mm at the shortest and 8 mm at the longest. By setting the projection length of the second flange extending portion 12e closest to the inside and having the greatest thermal influence to 2 to 8 mm, the insulative heat in the inside can be efficiently reduced after securing the strength of the heat insulating box 2. Can be reduced.
[0045]
Moreover, in this Embodiment, since the heat insulating material 14 is reliably filled to the refrigerator front peripheral part 15 without arrange | positioning the pipe for heat radiation or the sweating prevention heater, the heat insulation of the refrigerator front peripheral part 15 improves. . This is because a fixing material such as hot melt whose heat insulating performance is about 10 times worse than that of the foam heat insulating material 14 for fixing the heat radiating pipe and the sweating prevention heater to the outer box 12 or the inner box 11 is not required. is there. Moreover, since the heat insulating material 14 is reliably filled to the refrigerator front peripheral part 15, there also exists an effect that the intensity | strength of a box improves.
[0046]
Furthermore, it does not require heat-dissipating pipes, anti-sweat heaters, or hot melt and other fixing materials, contributing to reductions in material costs and man-hours.
[0047]
(Embodiment 2)
FIG. 7 is a plan cross-sectional view of the main part of the front peripheral edge of the refrigerator body according to the second embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0048]
In the figure, a heat radiating pipe 16 or a sweating prevention heater 17 is disposed in the space between the outer box 12 and the second flange 12d.
[0049]
With the above configuration, the heat radiating pipe 16 or the sweating prevention heater 17 is disposed in the space between the outer box 12 and the second flange 12d, so that sweating of the outer box 12 and the front flange 12a can be reliably prevented. The flange structure described in the first embodiment can reduce the heat intrusion load from the heat radiating pipe 16 or the sweating prevention heater 17 into the refrigerator cabinet as compared with the conventional case, and the heat radiating pipe 16 or the sweating prevention heater 17 can be used. Even in the event of sweating, it is possible to save energy while reliably preventing sweating.
[0050]
(Embodiment 3)
FIG. 8 is a plan sectional view of the main part of the front peripheral edge of the refrigerator body according to the third embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0051]
In the figure, a double flange 12g is formed so that the outer box 12 and the second flange 12d are in contact with each other. And the position e of the 2nd flange extension part 12e is located in the warehouse outer side from the position f of the front flange return part 12b.
[0052]
With the above configuration, when the outer box 12 and the second flange 12d are in contact with each other, the width of the inner box insertion portion 11c of the second flange 12d can be increased, the inner box insertion is ensured, and the second flange extension portion 12e. The position e of the second flange extending portion 12e can be further separated from the surface of the inner box 11 by positioning the position e on the outer side of the position f of the front flange folded portion 12b. Reduces heat intrusion and prevents condensation on the front flange.
[0053]
In the present embodiment, the heat radiation pipe 18 or sweating prevention is provided in the space between the inner box flange-shaped groove 11c provided in the inner box facing the rear flange 12c, and the rear flange 12c and the inner box flange-shaped groove 11c. The heater 19 may be inserted and fixed. In this case, before the inner box 11 and the outer box 12 are assembled, the heat radiating pipe 18 or the sweating prevention heater 19 is fixed to the inner box bowl-shaped groove 11c in advance.
[0054]
With the above configuration, sweating of the outer box 12 and the front flange 12a can be reliably prevented, and the heat penetration load from the heat radiation pipe 18 or the sweating prevention heater 19 into the refrigerator cabinet by the flange structure described in the first embodiment. Can be reduced as compared with the prior art, and energy can be saved even when the heat radiating pipe 18 or the sweating prevention heater 19 is used. Further, in comparison with the case where the heat radiating pipe 18 or the sweating prevention heater 19 is disposed in the space between the outer box 12 and the second flange 12d, the workability is improved and the number of man-hours is improved by incorporating it in the inner box bowl-shaped groove 11c in advance. Reduction is possible.
[0055]
(Embodiment 4)
FIG. 9 is a plan cross-sectional view of the main part of the front peripheral edge of the refrigerator body according to the fourth embodiment of the present invention. Detailed description of the same components as those of the first embodiment will be omitted, and only different parts will be described.
[0056]
In the figure, reference numeral 20 denotes a vacuum heat insulating material, and a heat insulating material made of fine powder such as silica or pearlite, glass fiber, open-cell foamed urethane or the like in a bag welded around a multilayer laminate film that prevents gas permeation. After insertion, the gas in the bag is evacuated and sealed in a vacuum state. The heat insulation performance is approximately 10 times that of the foamed heat insulating material 14 which is a rigid urethane foam, and the vacuum heat insulating material 20 having a thermal conductivity of 0.004 W / mK or less is hot-melted on the side surface of the outer box 12 or the inner box 11. After pasting with the fixing member, rigid urethane foam is filled with foam.
[0057]
And the shortest distance g of the end surface of the 2nd flange extension part 12e of the double flange 12g and the vacuum heat insulating material 20 shall be 5 mm or more and 30 mm or less. Further, the distance h between the end face of the second flange extending portion 12e and the end face in the depth direction of the vacuum heat insulating material 20, and the distance i between the end face of the second flange extending portion 12e and the end face in the thickness direction of the vacuum heat insulating material 20 Are h> 0 and i> 0, respectively. That is, the projection surface of the vacuum heat insulating material 20 and the end surface of the second flange extending portion 12e are not overlapped.
[0058]
With the above configuration, in addition to the heat penetration reduction effect of the double flange structure described above, the heat penetration into the cabinet can be further reduced by applying a high-performance vacuum heat insulating material. At the same time, since the amount of heat exchange decreases, the surface temperature of the outer box 12 rises, and condensation on the peripheral edge 15 of the refrigerator front surface can be prevented by the side surface of the outer box 12 and heat conduction.
[0059]
Since the shortest distance g between the end surface of the second flange extending portion 12e and the vacuum heat insulating material 20 is 5 mm or more, the safety of the manufacturing method and the absorption by the vacuum heat insulating material are applied when the vacuum heat insulating material 20 is attached or after installation. The vacuum heat insulating material 21 can be prevented from being damaged while maximizing the effect of reducing the amount of heat. That is, it is possible to prevent the second flange extending portion 12e from coming into contact with and damage to the vacuum heat insulating material 20, and to improve reliability. Further, since the projection surface of the vacuum heat insulating material 20 and the end surface of the second flange extending portion 12e are not overlapped, the second flange extending portion 12e is further in contact with and damaged by the vacuum heat insulating material 20. The reliability of the vacuum heat insulating material 20 can be further increased. In addition, since the shortest distance g between the end face of the second flange extending portion 12e and the vacuum heat insulating material 20 is 30 mm or less, the vacuum heat insulating material 20 can be arranged up to the vicinity of the double flange 12g, and the heat insulating performance is improved. Can do.
[0060]
(Embodiment 5)
FIG. 10 is a plan cross-sectional view of the main part of the front peripheral edge of the refrigerator body according to the fifth embodiment of the present invention. Detailed description of the same components as those in the fourth embodiment will be omitted, and only different parts will be described.
[0061]
In the figure, the end face of the second flange extension 12e is bent in the direction of the front opening, and the end face of the second flange extension 12e is rounded in the direction of the front opening, thereby providing vacuum insulation. When the material 20 is incorporated, even if it contacts the end surface of the second flange extending portion 12e, the contact with the surface is settled, and the vacuum heat insulating material 20 can be prevented from being damaged.
[0062]
(Embodiment 6)
FIG. 11 is a cross-sectional plan view of a main part of the front peripheral edge of the refrigerator body according to the sixth embodiment of the present invention. Detailed description of the same components as those in the fourth embodiment will be omitted, and only different parts will be described.
[0063]
In the figure, 21 is a vacuum heat insulating material, and the vacuum heat insulating material 21 extends between the second flange extending portion 12 e and the inner box 11. Accordingly, heat transfer from the outer surface of the outer box 12 through the double flange 12g to the inner box 11 from the second flange extending portion 12e can be insulated by the vacuum heat insulating material 21 having high heat insulating performance, thereby saving energy. In addition, the temperature drop of the outer box 12 and the front flange 12a can be prevented, and sweating can be prevented.
[0064]
(Embodiment 7)
12 to 14 are perspective views of the outer box 12 according to the seventh embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0065]
In recent refrigerators, a door shelf for storing food / drinking water or the like is installed in the door 8 of the refrigerator compartment 5, and this storage amount is very large, and the strength against the load is required. . Therefore, as one means for increasing the strength of the refrigerator, there is a method in which the second flange extension portion 12e of the outer box 12 is lengthened to increase the adhesion with urethane foam and increase the strength of the box. However, on the other hand, it is also necessary to prevent heat penetration from the double flange 12g from the viewpoint of energy saving.
[0066]
Therefore, in the present embodiment, the shape of the second flange extending portion 12e has a different length in the vertical direction of the refrigerator body, and when the shape of the second flange extending portion 12e is different, the shape changes linearly. I am letting.
[0067]
With the above configuration, in the refrigerator in which the refrigerating room 5 that is a relatively high temperature zone is partitioned in the upper portion and the freezer compartment 7 that is a relatively low temperature zone is partitioned in the lower portion, the upper refrigerating chamber 5 is located on both sides. There is a hinge mechanism (not shown) for supporting the door 8 on either or both of them, and a load of food stored in the door is applied to the hinge mechanism 2 to deform the refrigerator body 2.
[0068]
However, the length of the second flange extending part 12e is linearly deformed so as to decrease from the upper part to the lower part, and the second flange extension of the refrigerator compartment 5 or the vegetable compartment 6 is relatively difficult to be attached to the temperature difference between the outside air and the inside temperature. The extension part 12e maintains the strength by keeping it long, and the second flange extension part 12e on the side surface of the freezer compartment 7 on which the difference between the outside air and the internal temperature tends to be attached shortens the intrusion heat amount and also maintains the strength. . Moreover, by changing linearly, the processing method of the 2nd flange extension part of an outer box becomes simple, and it can restrain an equipment investment and production cost.
[0069]
As shown in FIG. 13, the length of the second flange extending portion 12 e may be changed at an intermediate point 22.
[0070]
As a form to change at an arbitrary point 22 in the middle, it is desirable to change at the boundary part of the internal temperature zone of the refrigerator 1, for example, the part in contact with the upper partition 3 or the lower partition 4. As a result, the length of the second flange extending portion 12e can be set according to the portion where the heat penetration reduction effect is required in terms of temperature, and the design has a high degree of freedom while achieving both strength and reduction of heat penetration into the cabinet. Is possible. More specifically, a structure in which the length of the second flange extending portion 12e in the refrigeration temperature zone is shorter than that in the refrigeration temperature zone is desirable. Thereby, the heat penetration reduction effect is enhanced by shortening the length of the second flange extending portion 12e in the refrigeration temperature zone having a large temperature difference from the ambient temperature while ensuring the strength of the front opening of the entire refrigerator. Can do.
[0071]
Further, as another form to be changed at an arbitrary point 22 in the middle, it is desirable to change at the boundary part of the opening / closing form of the refrigerator door corresponding to the front opening, for example, the part in contact with the upper partition 3. Thereby, the length of the 2nd flange extension part 12e can be set up according to the load concerning a front opening part via the support part of a refrigerator door, and it is free, coexisting with intensity | strength and the reduction | decrease of heat penetration into a warehouse. A high degree of design is possible. More specifically, a structure in which the length of the second flange extending portion 12e of the hinge type door is longer than that of the drawer type door is desirable. Thereby, by reducing the length of the second flange extending portion 12e of the front opening corresponding to the hinged door that increases the load applied to the front opening, the heat intrusion into the refrigerator as a whole is reduced. However, strength can be secured.
[0072]
In addition, as shown in FIG. 14, by providing a plurality of slits 23 at arbitrary locations on the second flange extension portion 12e, the heat conduction area of the second flange extension portion 12e is reduced, and heat intrusion into the chamber is prevented. Can be reduced. And the intensity | strength of a refrigerator box can be aimed at by increasing the area which the heat insulating material 14 adhere | attaches on a 2nd flange surface.
[0073]
【The invention's effect】
  As described above, the invention according to claim 1 includes an inner box that constitutes the inside of the cabinet, an outer box that forms the outer surface of the refrigerator, and a foam heat insulating material that is filled in the space between the inner box and the outer box. A front flange bent inward at the front opening edge of the outer box, a front flange folded portion, a back flange folded back to the back side of the front flange, a second flange formed continuously from the back flange, and a back surface In a refrigerator having a double flange structure comprising an inner box insertion portion formed by a flange and a second flange, and a second flange extending portion formed continuously from the second flange, The shape is a projection length of 15 mm or less for the inner box.The second flange extension portion is vertically changed in the refrigerator main body, and the length of the second flange in the refrigeration temperature zone is shorter than the refrigeration temperature zone, so that the length varies depending on the refrigerator temperature zone. MakeThe second flange extending part is firmly fixed in the foam heat insulating material, so that the strength of the refrigerator main body is secured and the outer box is connected to the inner box inside the refrigerator cabinet via the second flange. Heat intrusion due to heat conduction can be reduced, and the amount of power consumption can be reduced and condensation can be prevented by reducing the cooling effect from the inside of the front peripheral edge of the outer box.
In addition, the length of the second flange extending portion can be set according to the portion where the strength is structurally required, and a design with a high degree of freedom is possible while achieving both strength and reduced heat penetration into the interior.
In addition, the length of the second flange extension can be set according to the part that requires a heat penetration reduction effect in terms of temperature, allowing for a high degree of freedom while achieving both strength and reduced heat penetration into the cabinet. It becomes.
Moreover, the heat penetration reduction effect can be enhanced by shortening the length of the second flange extending portion in the freezing temperature zone having a large temperature difference from the ambient temperature while ensuring the strength of the front opening of the entire refrigerator. .
The invention according to claim 2 includes an inner box constituting the inside of the cabinet, an outer box forming the outer surface of the refrigerator, a foam heat insulating material filled in a space between the inner box and the outer box, and the outer box. A front flange folded inward at the front opening edge of the box, a front flange folded portion, a back flange folded back to the back side of the front flange, a second flange formed continuously from the back flange, a back flange and a second A refrigerator having a double flange structure including an inner box insertion portion formed by a flange and a second flange extending portion formed continuously with the second flange, wherein the shape of the double flange is an inner box The length of the second flange extending portion is 15 mm or less, and the second flange extending portion is in the vertical direction of the refrigerator body, and the length of the second flange extending portion of the hinged door is longer than that of the drawer door. Corresponding to The length is changed depending on the opening / closing mode of the refrigerator door, and the second flange extending portion is firmly fixed in the foam heat insulating material, so that the strength of the refrigerator main body is secured and the second flange is secured. The heat intrusion due to heat conduction from the outer box to the inner box inside the refrigerator can be reduced, and the reduction of power consumption and the prevention of condensation due to the cooling action from the inside of the outer peripheral edge of the outer box can be reduced. .
In addition, the length of the second flange extending portion can be set according to the portion where the strength is structurally required, and a design with a high degree of freedom is possible while achieving both strength and reduced heat penetration into the interior.
In addition, the length of the second flange extension can be set according to the load applied to the front opening through the support part of the refrigerator door, and the degree of freedom can be achieved while achieving both strength and reduced heat penetration into the cabinet. High design is possible.
In addition, by increasing the length of the second flange extension part of the front opening corresponding to the hinged door where the load applied to the front opening increases, the strength of the refrigerator as a whole is reduced while reducing heat penetration. Can be secured.
[0074]
  Also,Claim 3The invention described inClaim 1 or claim 2In the invention described in, by keeping the shortest distance of 7 mm or more between the inner surface of the inner box and the double flange at least 7 mm, the heat insulation material is reliably filled between the double flange and the outer box while ensuring the strength of the refrigerator body. In addition, heat intrusion from the double flange to the inner box due to heat conduction can be further reduced. Moreover, the cooling effect | action from the store | warehouse | chamber of the outer case front peripheral part can be reduced.
[0075]
  Also,Claim 4The invention described inAny one of Claim 1 to Claim 3In the invention described in the above, even when a heat radiating pipe or a sweating prevention heater is inserted and fixed in the space between the outer box and the double flange and a heat source for sweating is attached to the front flange part, It is possible to reduce heat conduction for preventing heat from being transferred into the cabinet, and to keep the temperature of the outer box surface high enough not to sweat, thereby realizing energy saving and prevention of condensation.
[0076]
  Also,Claim 5The invention described inAny one of Claim 1 to Claim 3In the invention described in the above, a heat dissipating pipe or a sweating prevention heater is inserted and fixed in the space between the inner box bowl-shaped groove provided in the inner box facing the rear flange and the rear flange and the inner box bowl-shaped groove. Even when a heat source for preventing sweating is attached to the back flange, the heat for preventing sweating is reduced from being conducted into the cabinet, and the temperature of the outer box surface is kept high enough not to sweat. Energy saving and prevention of condensation.
[0077]
  Also,Claim 6The invention described inAny one of Claim 1 to Claim 3In the invention described in the above, a double flange structure is formed in which the outer box and the second flange are in contact with each other, the width of the inner box insertion portion of the second flange can be increased, and insertion of the inner box is ensured, The position of the second flange extending portion can be further separated from the surface of the inner box, and further reduction of heat penetration into the warehouse and prevention of dew condensation on the front flange are enhanced.
[0078]
  Also,Claim 7The invention described inAny one of Claims 1-6The position of the second flange extending part is located on the inner side of the front flange folded part, the width of the inner box inserting part of the second flange can be increased, and the inner box insertion is ensured. At the same time, the heat penetration reduction from the front flange into the cabinet and the anti-condensation effect of the front flange are enhanced.
[0079]
  Also,Claim 8The invention described inAny one of Claims 1-6The position of the second flange extending part is located outside the front flange folded part, and the position of the second flange extending part can be further separated from the surface of the inner box. Further reduction of heat penetration into the cabinet and prevention of condensation on the front flange are enhanced.
[0080]
  Also,Claim 9The invention described inAny one of Claims 1-8.In the invention described in the above, a vacuum heat insulating material having a thermal conductivity of 0.004 W / mK or less is disposed on the side surface and the top surface of the refrigerator body, and in addition to the effect of reducing the heat penetration of the double flange structure, a high performance vacuum heat insulating material By applying the material, it is possible to further reduce the heat intrusion into the warehouse.
[0081]
  Also,Claim 10The invention described inClaim 9The shortest distance between the second flange extension part and the vacuum heat insulating material is 5 mm or more and 30 mm or less, and the second flange extension part is prevented from coming into contact with or being damaged by the vacuum heat insulating material. At the same time, the arrangement effect of the vacuum heat insulating material can be enhanced.
[0082]
  Also,Claim 11The invention described inClaim 9 or Claim 10The second flange extending portion is bent in the direction of the front opening, and the end surface of the second flange is rounded in the direction of the front opening so that the vacuum heat insulating material is disposed. Can be prevented from being damaged.
[0083]
  Also,Claim 12The invention described inAny one of Claims 9 to 11In the invention described in (2), a vacuum heat insulating material is extended between the second flange extending portion and the inner box, and heat penetration from the second flange into the cabinet can be further reduced.
[0085]
  The invention according to claim 13 isAny one of Claims 1-12In the invention described in the above, when the shape of the second flange extending portion is set to different lengths, the second flange extending portion is linearly changed. By changing the shape linearly, the processing method of the second flange extending portion of the outer box is simplified. Thus, capital investment and production costs can be reduced.
[0090]
  Also,Claim 14The invention described in14. Any one of claims 1 to 13.In the invention described in 1), by providing a plurality of slits at arbitrary locations of the second flange extending portion, it is possible to improve the strength by suppressing the heat conduction due to the reduction of the heat transfer area and by the urethane biting into the slit locations.
[Brief description of the drawings]
FIG. 1 is an external view of a first embodiment of a refrigerator according to the present invention.
FIG. 2 is a front view of the refrigerator according to the embodiment.
FIG. 3 is a plan cross-sectional view of the main part of the refrigerator front periphery of the refrigerator according to the embodiment;
FIG. 4 is a characteristic diagram showing the relationship between the projected length of the double flange inner box of the refrigerator and the amount of intrusion heat in the refrigerator according to the embodiment;
FIG. 5 is a characteristic diagram showing the relationship between the distance from the second flange and the inner box of the refrigerator according to the embodiment and the amount of intrusion heat.
FIG. 6 is a diagram showing the surface temperature of the front peripheral edge of the refrigerator when the high temperature and high humidity of the refrigerator according to the embodiment is assumed
FIG. 7 is a plan sectional view of the main part of the front peripheral edge of the refrigerator according to the second embodiment of the present invention.
FIG. 8 is a cross-sectional plan view of the main part of the front peripheral edge of the refrigerator according to the third embodiment of the present invention.
FIG. 9 is a plan sectional view of the main part of the front peripheral edge of the refrigerator according to the fourth embodiment of the present invention.
FIG. 10 is a cross-sectional plan view of the main part of the front peripheral edge of the refrigerator according to the fifth embodiment of the present invention.
FIG. 11 is a cross-sectional plan view of the main part of the front peripheral edge of the refrigerator according to the sixth embodiment of the present invention.
12 is a perspective view of an outer box of a refrigerator according to a seventh embodiment of the present invention. FIG.
FIG. 13 is a perspective view of another outer box of the refrigerator according to the embodiment.
FIG. 14 is a perspective view of another outer box of the refrigerator according to the embodiment.
[Explanation of symbols]
1 Refrigerator
2 Insulated box
5 Cold room
6 Vegetable room
7 Freezer room
8 Cold room door
9 Vegetable room door
10 Freezer compartment door
11 Inner box
11c Inner box bowl-shaped groove
12 Outer box
12a Front flange
12b Front flange folded part
12c Back flange
12d 2nd flange
12e Second flange extension
12f Inner box insertion part
12g double flange
14 Foam insulation
15 Front edge
16, 18 Heat dissipation pipe
17, 19 Heater for preventing sweating
20, 21 Vacuum insulation
23 Slit

Claims

An inner box constituting the inside of the cabinet, an outer box forming the outer surface of the refrigerator, a foam heat insulating material filled in a space between the inner box and the outer box, and a front surface bent inward at a front opening edge of the outer box A flange, a front flange folded portion, a back flange folded back to the back side of the front flange, a second flange formed continuously from the back flange, and an inner box insertion portion formed by the back flange and the second flange; In the refrigerator having a double flange structure composed of a second flange extending portion formed continuously with the second flange, the shape of the double flange has a projected length with respect to an inner box of 15 mm or less . in second flange extending portion refrigerator body vertical direction, compared to the refrigeration temperature zone, so as to shorten the length of the second flange of the freezing temperature zone, altering the different lengths by the internal temperature zone of the refrigerator Refrigerator and butterflies.

An inner box constituting the inside of the cabinet, an outer box forming the outer surface of the refrigerator, a foam heat insulating material filled in a space between the inner box and the outer box, and a front surface bent inward at a front opening edge of the outer box A flange, a front flange folded portion, a back flange folded back to the back side of the front flange, a second flange formed continuously from the back flange, and an inner box insertion portion formed by the back flange and the second flange; In the refrigerator having a double flange structure composed of a second flange extending portion formed continuously with the second flange, the shape of the double flange has a projected length with respect to an inner box of 15 mm or less . The two flange extension part is in the vertical direction of the refrigerator main body, and the refrigerator door corresponding to the front opening is opened and closed so that the length of the second flange extension part of the hinged door is longer than that of the drawer door. Different Refrigerators and changing the length that.

The refrigerator according to claim 1 or 2 , wherein the shortest distance between the inner surface of the inner box and the double flange is 7 mm or more.

The refrigerator according to any one of claims 1 to 3 , wherein a heat radiating pipe or a sweating prevention heater is inserted and fixed in a space between the outer box and the double flange.

An inner box gutter-shaped groove provided in the inner box opposed to the rear surface flange, claim from claim 1, the back surface flange and space inserted and fixed to the radiating pipe or antiperspirant heater to between the inner box gutter groove The refrigerator according to any one of 3 .

The refrigerator according to any one of claims 1 to 5, wherein a double flange structure in which the outer box and the second flange are in contact with each other is formed.

The position of a 2nd flange extension part is located in the store | warehouse | chamber inside from a front flange return part, The refrigerator as described in any one of Claims 1-6 characterized by the above-mentioned.

The position of a 2nd flange extension part is located in the warehouse outer side rather than a front flange return part, The refrigerator as described in any one of Claims 1-6 characterized by the above-mentioned.

The refrigerator according to any one of claims 1 to 8, wherein a vacuum heat insulating material having a thermal conductivity of 0.004 W / mK or less is disposed on a side surface and a top surface of the refrigerator main body.

The refrigerator according to claim 9 , wherein the shortest distance between the second flange extension portion and the vacuum heat insulating material is 5 mm or more and 30 mm or less.

The refrigerator according to claim 9 or 10 , wherein the second flange extending portion is bent in the direction of the front opening.

The refrigerator according to any one of claims 9 to 11 , wherein a vacuum heat insulating material extends between the second flange extending portion and the inner box.

The refrigerator according to any one of claims 1 to 12, wherein when the shape of the second flange extending portion is set to a different length, the second flange extending portion is linearly changed.

The refrigerator according to any one of claims 1 to 13, wherein a plurality of slits are provided at an arbitrary portion of the second flange extending portion.