JP4238475B2 - refrigerator - Google Patents

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Publication number
JP4238475B2
JP4238475B2 JP2000337123A JP2000337123A JP4238475B2 JP 4238475 B2 JP4238475 B2 JP 4238475B2 JP 2000337123 A JP2000337123 A JP 2000337123A JP 2000337123 A JP2000337123 A JP 2000337123A JP 4238475 B2 JP4238475 B2 JP 4238475B2
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JP
Japan
Prior art keywords
insulating material
heat insulating
vacuum heat
refrigerator
box
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP2000337123A
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Japanese (ja)
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JP2002147942A (en
Inventor
英樹 中根
修 浅川
太嘉志 山内
厚 黒島
司 宅島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP2000337123A priority Critical patent/JP4238475B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は外箱と内箱間に真空断熱材を備えた断熱箱体からなる冷蔵庫に関するものである。
【0002】
【従来の技術】
近年、冷蔵庫においては省エネルギーと大容量化のニーズが高まっている。しかし住宅事情の関係で冷蔵庫の大型化に対する設置スペースの制約があり、大容量化を実現するためには冷蔵庫本体内の無効空間を見直し、減らすことによって容積効率を高め、設置スペースを大きくせずに有効な内容積を増やすことが求められている。
【0003】
そして庫内の容積効率を高め、かつ吸熱量を増大させない省エネ型の冷蔵庫を実現するために、冷蔵庫本体の断熱材の断熱性能を強化し断熱層を薄くする必要が生じており、真空断熱材が用いられるようになって来た。従来のこの種の冷蔵庫としては、特開平10−205993号公報と特開平10−205995号公報に示されているものがある。
【0004】
特開平10−205993号公報について図面を参照しながら説明する。
【0005】
図11は従来の冷蔵庫の中央断面図である。図11において、1は冷蔵庫本体で、2は外箱で、3は内箱で、4は真空断熱材であり、外箱2と内箱3のいずれか一方の内壁面に配置し、発泡断熱材との接触面側に断熱材シート4aを配置しているようになっている。
【0006】
また、特開平10−205995号公報について図面を参照しながら説明する。
【0007】
図12は、従来の冷蔵庫の縦断面図である。図13は同冷蔵庫のドアを除く正面図である。5は冷蔵庫本体で、前方に開口する鋼鈑製の外箱6と、硬質樹脂製の内箱7間に発泡ポリウレタン断熱材8を現場発泡方式により充填して成る断熱箱体9により形成されており、この断熱箱体9の庫内は、中央部に設けられた仕切板10によって上下に区分けされ、仕切板10の上方を冷蔵温度(+5℃程)に維持される冷蔵室11としている。
【0008】
仕切板10の下方は更に真空断熱材を内蔵した略L字状の断熱仕切壁12にて上下に区画され、この断熱仕切壁12と仕切板10の間を野菜などの乾燥を嫌う食品を収納するための野菜室13としている。
【0009】
断熱仕切壁12の下方、即ち、庫内最下部を凍結温度(−20℃程)に冷却される冷凍室14としている。断熱箱体9の底壁9Aは後部が階段状に立ち上がる形状とされており、この底壁9Aの後部外側には機械室15が形成され、圧縮機16を配している。
【0010】
また、底壁9Aが係る形状とされている関係上、冷凍室14の底部も後部が立ち上がる形状とされ、そのため、下方の容器17の後面は上方の容器18の後面よりも前方に位置するかたちとなる。
【0011】
一方、冷凍室14の両側方に対応する外箱6の側板6A内面には真空断熱材19が貼り付けられると共に、冷凍室14の下方に対応する外箱6の底板6A内面にも真空断熱材20が貼り付けられ、断熱材8内に埋設されている。
【0012】
また、冷凍室14の冷却室21を構成する冷却器22、送風機23の背方に対応する外箱6の背板6B内面にも真空断熱材24が貼り付けられ、断熱材8内に埋設されている。
【0013】
各真空断熱材19,20,24は、例えば内側からポリエチレン若しくはポリプロピレン若しくはポリプロピレンなどから成る熱溶着層とアルミニウム層及び表面保護層をラミネートしたガスバリアフィルムを折り返し、二辺を密着させて熱溶着層を相互に溶着する事により袋状とし、その状態でシリカ、パーライトなどの微粉末、及び、グラスファイバ、或いは、連続気泡の発泡ポリウレタン断熱材から成るコア材を挿入し、所定の真空排気装置内において袋内部のガスを排気して真空状態とした後、残りの一辺の前記熱溶着層を相互に溶着させて密封する事により製造されている。
【0014】
以上のように構成された真空断熱材を備えた断熱箱体から成る冷蔵庫について、以下その動作を説明する。
【0015】
冷凍室14の両側方に位置する真空断熱材19の上部は図12に示す如く野菜室13を経て冷蔵室11の下部まで延在すると共に、真空断熱材19の下端縁19Aはその後部が前部よりも所定の角度で徐々に立ち上がる傾斜形状とされている。
【0016】
これにより、真空断熱材19の下端縁19Aは底壁9Aの形状に近似した形状となり、真空断熱材19は機械室15を避けて冷凍室14底部の前部から後部に渡る略全域をカバーするようになる。
【0017】
これによって、機械室15による断熱箱体9の底壁9Aの形状に係わらず、真空断熱材19を断熱箱体9の側部に広い面積で貼付け、その断熱効果を向上させることができるようになる。
【0018】
【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では、外箱と内箱のいずれか一方の内壁面に直接真空断熱材を貼り付けているので、内箱あるいは、外箱との間に空気溜まりができ、外箱や内箱が変形し、美観を損なうという欠点があった。
【0019】
また、正方形或いは長方形で板状が主流である真空断熱材においては、コストがかかるという欠点があった。
【0020】
本発明は従来の課題を解決するもので、真空断熱材の形状を正方形或いは長方形とし、貼付け部、貼付け方を工夫することにより庫内熱侵入を効果的に抑制できる断熱箱体を構成し、容積効率が高く、使い勝手の良い冷蔵庫を提供することを目的とする。
【0021】
【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、外箱と、内箱で形成される内部空間内に前記内箱に接触して備えられる真空断熱材と前記真空断熱材の周囲隙間に、ウレタン原液を注入・発泡した発泡断熱材を充填した冷蔵庫において、前記真空断熱材は前記内箱に備えられた空気抜け孔に連通する貫通孔を有し、前記空気抜け孔の径は前記貫通孔の径より小さいので、発泡断熱材を充填した時に空気をスムーズに抜くことができ、空気抜け孔から断熱材が漏れ出すことはない。
【0029】
請求項に記載の発明は、外箱と、内箱で形成される内部空間内に前記外箱に接触して備えられる真空断熱材と前記真空断熱材の周囲隙間に、ウレタン原液を注入・発泡した発泡断熱材を充填した冷蔵庫において、前記真空断熱材は前記外箱に備えられた空気抜け孔に連通する貫通孔を有し、前記空気抜け孔の径は前記貫通孔の径より小さいので、発泡断熱材を充填した時に空気をスムーズに抜くことができ、空気抜け孔から断熱材が漏れ出すことはない。
【0030】
請求項に記載の発明は、請求項または請求項に記載の発明において、真空断熱材の貫通孔外周部の接着面を接着材で完全密封したので、断熱材を充填したときに断熱材が接着面に入り込んで貫通孔を塞ぐことはない。
【0035】
【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。なお、従来と同一構成については、同一符号を付して詳細な説明を省略する。
【0036】
(実施の形態1)
図1は本発明の実施の形態1による冷蔵庫の中央断面図である。
【0037】
図1において、30は冷蔵庫本体であり、31は冷蔵庫の外箱であり、32は冷蔵庫の内箱であり、33は内箱32と外箱31との間に充填して形成された発泡断熱材で、34は内箱32の内部空間に設けられ、外箱31側に突出し、内箱32と一体成形した凸部である。前記凸部34は、少なくとも真空断熱材35が配置される内箱32の所定面積分だけに形成されておればよいが、庫内側の同じ位置に、換言すると、背中合わせに凹部が形成されるので、意匠的にみて必要があるならそれ以外の場所にも凸部を複数個備えても良い。
【0038】
また凸部34の高さは約5mmとしている。約5mmあれば内箱32の基準面と真空断熱材35の間の空間にも十分発泡断熱材33が行き渡るので流動性確保することができる。また凸部34の高さが極端に高いと断熱材の流動性面には良いが意匠的に損なわれるため、約5mm程度が妥当である。
【0039】
35は凸部34に載置された真空断熱材であり、アルミ箔とプラスチックフィルムを積層させた外袋35a内にコア材35bが挿入され熱融着によって密着シールされて構成されている。
【0040】
すなわち真空断熱材35は冷蔵庫本体の背面に形成されている。
【0041】
36は冷蔵庫本体30の庫内後方に配置され内箱32の前方に空気の流れる経路の空間を設けて配置されたダクトカバーである。37は外箱31と一体成形された凸部であり、内箱32側に突出している。38は冷蔵庫本体30の後方下部に備えられた機械室である。機械室38は開口部を機械室カバー39で覆われており、機械室38内に配置された冷凍サイクルの圧縮機40などが外から見えないようになっている。
【0042】
41は凸部37に載置された真空断熱材であり、アルミ箔とプラスチックフィルムを積層させた外袋41a内にコア材41bが挿入され熱融着によって密着シールされて構成されており冷蔵庫の機械室内や底面に形成されている。真空断熱材35と凸部34との接触面、真空断熱材41と凸部37との接触面には熱硬化性の接着剤42が塗られており接触面に発泡断熱材33が混入しないようになっている。
【0043】
以上のように構成された冷蔵庫について、以下その動作を説明する。
【0044】
本体30の内箱32または外箱31の内壁面に部分的に形成した凸部34,37に真空断熱材35,41を接着剤42で接着固定している。
【0045】
その後、真空断熱材35が固定された内箱32と外箱31との間の空間部内に断熱材33を注入、発泡させて空間を断熱材33で充填することで冷蔵庫本体30が形成される。真空断熱材35は内箱32の内壁面との接触が小さくなるように凸部34と接触固定されているので、凸部34と真空断熱材35間には断熱材33を充填した時に、断熱材の流れが悪いと発生しやすいガスが溜まりにくく、ガス溜まりによる内箱32の変形を低減することができる。
【0046】
また、真空断熱材41も同様に外箱31の凸部37に接着固定され、さらに機械室カバー39で外から見えないようになっているので外箱31の変形を低減できるとともに、外観品位を維持できる。
【0047】
(実施の形態2)
図2は本発明の実施の形態2による冷蔵庫の断面図である。
【0048】
図2において、43は冷蔵庫本体30内に形成される貯蔵室の引出し容器であり、44は冷蔵庫本体30に対して前後に形成されたレールであり、引出し容器43はレール44上を前後に摺動するように載置されている。レール44は断面略コの字状であり、その取付部となる内箱32を外箱31側に突出させた凸部45にレール44が係合している。
【0049】
46は凸部45に接触固定された真空断熱材であり、冷蔵庫本体30の側面に設置されており、アルミ箔とプラスチックフィルムを積層させた外袋46a内にコア材46bが挿入され熱融着によって密着シールされて構成されている。
【0050】
以上のように構成された冷蔵庫について、以下その動作を説明する。
【0051】
内箱32の側面に固定された真空断熱材46は、引出し容器43が摺動するために必要なレール44の凸部45に接着固定しているので、内箱32と外箱31間の断熱空間を不用に薄くすることはなく、吸熱量を増大させることはない。
【0052】
また、真空断熱材46は内箱32と凸部45のみで接触固定しているので、凸部45と真空断熱材46間には断熱材33を充填した時に、発生するガスが凸部45と真空断熱材46との間に溜まりにくく、ガス溜まりによる内箱32の変形を低減することができる。
(実施の形態3)
図3は本発明の実施の形態3による真空断熱材の斜視図である。図4は、同実施の形態の冷蔵庫の縦断面図である。
【0053】
図3、図4において、47は真空断熱材であり、アルミ箔とプラスチックフィルムを積層させた外袋47a内にコア材47bが挿入され熱融着によって密着シールされて構成されている。48は真空断熱材47に開けられた貫通孔である。
【0054】
また、図4のように内箱49の背面には、第1の空気抜き孔50が所定の位置に備えられている。貫通孔48の直径は、第1の空気抜き孔50の直径と同等かそれ以上の寸法で形成されており、実際に貫通孔48の直径寸法は5〜15mmとしている。
【0055】
以上のように構成された冷蔵庫について、以下その動作を説明する。
【0056】
真空断熱材47を内箱49と外箱51との間で、第1の空気抜き孔50と貫通孔48が連通するように接触され、この際固定するために貫通孔48の周囲には接着剤52が塗布され内箱49と固定される。
【0057】
そして、発泡断熱材33を注入したとき、内箱49と外箱51間にある空気を貫通孔48から第1の空気抜け孔50を通して内箱32内へ抜くことができる。したがって、真空断熱材47と内箱49との間の空気は完全に放出され、空気溜まりがなくなり、又、真空断熱材47と内箱49とが密着される。
【0058】
また図4のように、外箱51には第2の空気抜け孔53が備えられ、第2の空気抜け孔53に連通するように貫通孔54を有する真空断熱材55を接触固定させる。このとき貫通孔54の周囲には接着剤52が塗布され外箱51と固定される。
【0059】
このように構成された冷蔵庫について、以下その動作を説明する。
【0060】
まず、真空断熱材55に設けられた貫通孔54と外箱51に設けられた第2の空気抜け孔53を連通するように真空断熱材55を配置することで、発泡断熱材33を注入したときの空気を貫通孔54から第2の空気抜け孔53を通して外箱51外へ抜くことができる。したがって、真空断熱材55と外箱51の間の空気は完全に外部に放出され、空気溜まりがなくなる。
【0061】
(実施の形態4)
図5は、実施の形態4の冷蔵庫の中央断面図である。
【0062】
図5において、56は真空断熱材47の貫通孔48の外周に巻いた連通フォームである。貫通孔48はこの連通フォーム56を介して内箱49に設けられた第1の空気抜け孔50に連通している。
【0063】
そして発泡断熱材33を注入したときに、外箱51と内箱49の間に断熱材33が充填され、さらに連通フォーム56によって真空断熱材47は内箱の壁面からわずかに空間を作っているので、その空間にも断熱材33が充填される。このとき連通フォーム56によって、内箱49と真空断熱47との間隔を実施の形態1の凸部34と同じ約5mmとすることで断熱材33の流動性を損なうことなく流すことができる。
【0064】
また、外箱51にこのような真空断熱材55を連通フォーム56を介して第2の空気抜き孔53と貫通孔54を連通させることで内箱に備えた時と同様に外箱の変形防止が実現できる。
【0065】
(実施の形態5)
図6は、本発明による冷蔵庫の実施の形態の縦断面図である。図7は、同実施形態の冷蔵庫の機械室カバ−を外した背面下部の詳細図である。図8は、図7のA−A線断面図である。図9は本実施形態の冷蔵庫に貼り付けた真空断熱材の斜視図である。図10は図9の真空断熱材の折り曲げ状態を示す斜視図である。
【0066】
図6、図7、図8において、57は冷蔵庫本体であり、外箱58と、内箱59間に発泡ポリウレタン断熱材60を充填して成る断熱箱体61により形成されており、この断熱箱体61の庫内は、中央部に設けられた仕切板62によって上下に区分けされ、仕切板62の上方を冷蔵室64としている。
【0067】
仕切板62の下方は更に発泡ウレタン断熱材60を充填できるように構成された仕切壁63にて上下に区画され、上部を冷蔵室64、この仕切壁63と仕切り板62の間を野菜室65とし、仕切壁63の下方、即ち、庫内最下部を冷凍室66としている。断熱箱体61の底壁61Aは後部が階段状に立ち上がる形状とされており、この底壁61Aの後部外側には機械室67が形成され、圧縮機68を設置し、機械室カバー69で覆われている。
【0068】
また、冷凍室66の底部も後部が立ち上がる形状とされ、そのため、冷凍室66の引出し容器70の後面は上方の収納容器71の後面よりも前方に位置するかたちとなる。
【0069】
一方、圧縮機68の近傍と底板58Aを形成する外箱58の内表面には真空断熱材72が貼付けられ、断熱材60内に埋設されている。
【0070】
図9、図10において、真空断熱材72は、例えば内側からポリエチレン若しくはポリプロピレンなどから成る熱溶着層とアルミニウム層及び表面保護層をラミネートしたガスバリアフィルムを折り返し、二辺を密着させて熱溶着層を相互に溶着する事により袋状とし、その状態でグラスファイバ、或いは、連続気泡の発泡ポリウレタン断熱材から成る正方形或いは長方形で板状のコア材を挿入し、所定の真空排気装置内において袋内部のガスを排気して真空状態とした後、残りの一辺の前記熱溶着層を相互に溶着させて密封する事により製造される。
【0071】
その後、真空断熱材72に線状の圧縮部73を設け、前記圧縮部73を折り曲げることにより外箱58の形状に貼り付けやすい真空断熱材72を提供することができる。
【0072】
以上のように構成された真空断熱材を備えた断熱箱体から成る冷蔵庫について、以下その動作を説明する。
【0073】
圧縮機68の近傍に位置する真空断熱材72は図6、図7、図8に示す如く、底板58Aの形状に近似して、圧縮機68の前方と上方を覆うように折り曲がって存在しているため、圧縮機68で発生した熱に対して、その断熱性能効果を有効に利用でき、消費電力の削減を図ることができる。
【0074】
また、底壁61Aの厚みを減らすことも可能となるため、引出し容器70の奥行70Aを増やすことができ、有効容積の拡大も図れる。
【0075】
一方、真空断熱材72は両側或いは、片側に圧縮部73を有してもよく、これによって前記圧縮部73で容易に曲げることができ、密封された袋状の熱溶着層が引っ張れて破れることはない。
【0076】
したがって、正方形或いは、長方形で板状の汎用の真空断熱材を真空状態に保ったまま、複雑な外板58Aの形状に近似させることが可能となり、容易に貼り付けることができる。
【0077】
【発明の効果】
以上説明したように請求項1に記載の発明では空気溜まりをなくすことができ、内箱の変形を防止することができる。
【0084】
また、請求項に記載の発明は、空気溜まりをなくすことができ、内箱の変形を防止することができる。
【0085】
また、請求項に記載の発明は、空気溜まりをなくすことができ、外箱の変形を防止することができる。
【0086】
また、請求項に記載の発明は、接着面に発泡断熱材が回りこまないようにしたことで、内箱または外箱の変形を防止できる。
【図面の簡単な説明】
【図1】本発明の実施の形態1の冷蔵庫の中央断面図
【図2】本発明の実施の形態2の冷蔵庫の正面断面図
【図3】本発明の実施の形態3による真空断熱材の斜視図
【図4】同実施の形態の冷蔵庫の縦断面図
【図5】実施の形態4の冷蔵庫の中央断面図
【図6】本発明による冷蔵庫の実施の形態5の縦断面図
【図7】同実施形態の冷蔵庫の機械室カバ−を外した背面下部の詳細図
【図8】図7のA−A線断面図
【図9】同実施形態の冷蔵庫に貼り付けた真空断熱材の斜視図
【図10】図9の真空断熱材の折り曲げ状態を示す斜視図
【図11】従来の冷蔵庫の中央断面図
【図12】従来の冷蔵庫の中央断面図
【図13】従来の冷蔵庫の正面図
【符号の説明】
30 外箱
31 内箱
33 発泡断熱材
34 凸部
35 真空断熱材
47 真空断熱材
48 貫通孔
50 第1の空気抜け孔
51 外箱
52 接着剤
53 第2の空気抜け孔
54 貫通孔
55 真空断熱材
56 連通フォーム
57 冷蔵庫本体
68 圧縮機
72 真空断熱材
73 圧縮部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator comprising a heat insulating box provided with a vacuum heat insulating material between an outer box and an inner box.
[0002]
[Prior art]
In recent years, there is a growing need for energy saving and large capacity in refrigerators. However, due to housing conditions, there are restrictions on the installation space for increasing the size of the refrigerator. In order to realize a large capacity, the ineffective space in the refrigerator body is reviewed and reduced to increase volumetric efficiency, without increasing the installation space. It is required to increase the effective internal volume.
[0003]
And in order to increase the volumetric efficiency in the warehouse and realize an energy-saving refrigerator that does not increase the amount of heat absorption, it is necessary to strengthen the heat insulation performance of the heat insulation material of the refrigerator body and make the heat insulation layer thin, and vacuum insulation material Has come to be used. Conventional refrigerators of this type include those disclosed in Japanese Patent Application Laid-Open Nos. 10-205993 and 10-205995.
[0004]
Japanese Patent Laid-Open No. 10-205993 will be described with reference to the drawings.
[0005]
FIG. 11 is a central sectional view of a conventional refrigerator. In FIG. 11, 1 is a refrigerator body, 2 is an outer box, 3 is an inner box, 4 is a vacuum heat insulating material, and is placed on one of the inner wall surfaces of the outer box 2 and the inner box 3 to provide foam insulation. The heat insulating material sheet 4a is arranged on the contact surface side with the material.
[0006]
Japanese Patent Laid-Open No. 10-205995 will be described with reference to the drawings.
[0007]
FIG. 12 is a longitudinal sectional view of a conventional refrigerator. FIG. 13 is a front view of the refrigerator excluding the door. Reference numeral 5 denotes a refrigerator body, which is formed by a steel box outer box 6 that opens forward, and a heat insulating box body 9 that is formed by filling a polyurethane foam heat insulating material 8 between the hard resin inner box 7 by an in-situ foaming method. The interior of the heat insulating box 9 is divided into upper and lower parts by a partition plate 10 provided at the center, and the upper part of the partition plate 10 is a refrigeration chamber 11 maintained at a refrigeration temperature (about + 5 ° C.).
[0008]
Below the partition plate 10 is further divided into upper and lower portions by a substantially L-shaped heat insulating partition wall 12 containing a vacuum heat insulating material, and between the heat insulating partition wall 12 and the partition plate 10 stores foods such as vegetables that are not to be dried. It is a vegetable room 13 to do.
[0009]
A freezer compartment 14 that is cooled to a freezing temperature (about −20 ° C.) is formed below the heat insulating partition wall 12, that is, the lowermost part in the cabinet. The bottom wall 9A of the heat insulating box 9 has a shape in which the rear part rises in a stepped manner, and a machine chamber 15 is formed outside the rear part of the bottom wall 9A, and a compressor 16 is arranged.
[0010]
Further, because the bottom wall 9A has such a shape, the bottom part of the freezer compartment 14 is also shaped so that the rear part rises, so that the rear surface of the lower container 17 is positioned forward of the rear surface of the upper container 18. It becomes.
[0011]
On the other hand, a vacuum heat insulating material 19 is attached to the inner surface of the side plate 6A of the outer box 6 corresponding to both sides of the freezer compartment 14, and the vacuum heat insulating material is also applied to the inner surface of the bottom plate 6A of the outer box 6 corresponding to the lower portion of the freezer compartment 14. 20 is affixed and embedded in the heat insulating material 8.
[0012]
Further, a vacuum heat insulating material 24 is attached to the inner surface of the back plate 6B of the outer box 6 corresponding to the back of the cooler 22 and the blower 23 constituting the cooling chamber 21 of the freezing chamber 14 and is embedded in the heat insulating material 8. ing.
[0013]
Each of the vacuum heat insulating materials 19, 20, 24 is formed by folding back a gas barrier film in which a heat welding layer made of, for example, polyethylene, polypropylene, or polypropylene, and an aluminum layer and a surface protection layer are laminated, and bonding the two sides to form a heat welding layer. A bag is formed by welding to each other, and in that state, a fine powder such as silica and pearlite, and a core material made of glass fiber or open-cell foamed polyurethane heat insulating material are inserted, and in a predetermined vacuum exhaust device. After the gas inside the bag is evacuated to be in a vacuum state, the remaining one side of the heat welding layer is welded to each other and sealed.
[0014]
About the refrigerator which consists of a heat insulation box provided with the vacuum heat insulating material comprised as mentioned above, the operation | movement is demonstrated below.
[0015]
The upper part of the vacuum heat insulating material 19 located on both sides of the freezer compartment 14 extends through the vegetable compartment 13 to the lower part of the refrigerating chamber 11 as shown in FIG. The inclined shape gradually rises at a predetermined angle from the portion.
[0016]
Thereby, the lower end edge 19A of the vacuum heat insulating material 19 has a shape approximate to the shape of the bottom wall 9A, and the vacuum heat insulating material 19 covers the substantially entire region from the front portion to the rear portion of the freezing chamber 14 avoiding the machine chamber 15. It becomes like this.
[0017]
Thus, regardless of the shape of the bottom wall 9A of the heat insulating box 9 by the machine room 15, the vacuum heat insulating material 19 can be applied to the side of the heat insulating box 9 in a wide area so that the heat insulating effect can be improved. Become.
[0018]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, since the vacuum heat insulating material is directly attached to the inner wall surface of either the outer box or the inner box, air can be trapped between the inner box or the outer box, and the outer box or the inner box. There was a drawback that the box was deformed and the aesthetic appearance was impaired.
[0019]
In addition, the vacuum heat insulating material, which is square or rectangular and the plate shape is the mainstream, has a drawback that it is costly.
[0020]
The present invention solves the conventional problem, and the shape of the vacuum heat insulating material is a square or a rectangle, and constitutes a heat insulation box that can effectively suppress the heat intrusion in the cabinet by devising the pasting part and the pasting method, The object is to provide a refrigerator with high volumetric efficiency and ease of use.
[0021]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention is an undiluted urethane solution in an outer box, a vacuum heat insulating material provided in contact with the inner box in an inner space formed by the inner box, and a gap around the vacuum heat insulating material. In the refrigerator filled with foamed heat insulating material injected and foamed, the vacuum heat insulating material has a through hole communicating with the air vent hole provided in the inner box, and the diameter of the air vent hole is the diameter of the through hole. Since it is smaller, air can be smoothly extracted when the foam heat insulating material is filled, and the heat insulating material does not leak out from the air vent hole.
[0029]
The invention according to claim 2 injects a urethane stock solution into a space between the outer box, a vacuum heat insulating material provided in contact with the outer box in an inner space formed by the inner box, and the vacuum heat insulating material. In the refrigerator filled with the foamed heat insulating material, the vacuum heat insulating material has a through hole communicating with the air hole provided in the outer box, and the diameter of the air hole is smaller than the diameter of the through hole. When the foam heat insulating material is filled, the air can be smoothly extracted, and the heat insulating material does not leak out from the air hole.
[0030]
The invention according to claim 3 is the invention according to claim 1 or 2 , wherein the adhesive surface of the outer peripheral portion of the through hole of the vacuum heat insulating material is completely sealed with the adhesive, so that the heat insulating material is insulated when filled with the heat insulating material. The material does not enter the bonding surface and block the through hole.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0036]
(Embodiment 1)
FIG. 1 is a central sectional view of a refrigerator according to Embodiment 1 of the present invention.
[0037]
In FIG. 1, 30 is a refrigerator body, 31 is an outer box of the refrigerator, 32 is an inner box of the refrigerator, and 33 is a foam heat insulation formed by filling between the inner box 32 and the outer box 31. 34 is a convex part which is provided in the inner space of the inner box 32, protrudes toward the outer box 31 and is integrally formed with the inner box 32. The convex portion 34 only needs to be formed at least for a predetermined area of the inner box 32 where the vacuum heat insulating material 35 is disposed, but in other words, because the concave portion is formed back to back at the same position inside the warehouse. If necessary from the viewpoint of design, a plurality of convex portions may be provided at other locations.
[0038]
Moreover, the height of the convex part 34 is about 5 mm. If the thickness is about 5 mm, the foamed heat insulating material 33 is sufficiently distributed to the space between the reference surface of the inner box 32 and the vacuum heat insulating material 35, so that fluidity can be ensured. Further, if the height of the convex portion 34 is extremely high, it is good for the fluidity surface of the heat insulating material, but it is damaged in design, so about 5 mm is appropriate.
[0039]
Reference numeral 35 denotes a vacuum heat insulating material placed on the convex portion 34. The core material 35b is inserted into an outer bag 35a in which an aluminum foil and a plastic film are laminated, and is tightly sealed by heat sealing.
[0040]
That is, the vacuum heat insulating material 35 is formed on the back surface of the refrigerator body.
[0041]
Reference numeral 36 denotes a duct cover that is disposed behind the refrigerator main body 30 and provided with a space for air flow in front of the inner box 32. 37 is a convex part integrally formed with the outer box 31, and protrudes toward the inner box 32 side. Reference numeral 38 denotes a machine room provided at the lower rear portion of the refrigerator main body 30. The opening of the machine room 38 is covered with a machine room cover 39 so that the compressor 40 of the refrigeration cycle disposed in the machine room 38 cannot be seen from the outside.
[0042]
Reference numeral 41 denotes a vacuum heat insulating material placed on the convex portion 37. The core material 41b is inserted into an outer bag 41a in which an aluminum foil and a plastic film are laminated, and is tightly sealed by heat fusion. It is formed in the machine room and on the bottom. The contact surface between the vacuum heat insulating material 35 and the convex portion 34 and the contact surface between the vacuum heat insulating material 41 and the convex portion 37 are coated with a thermosetting adhesive 42 so that the foam heat insulating material 33 is not mixed into the contact surface. It has become.
[0043]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.
[0044]
Vacuum heat insulating materials 35 and 41 are bonded and fixed to the convex portions 34 and 37 partially formed on the inner wall surface of the inner box 32 or the outer box 31 of the main body 30 with an adhesive 42.
[0045]
Then, the refrigerator main body 30 is formed by injecting and foaming the heat insulating material 33 into the space between the inner box 32 and the outer box 31 to which the vacuum heat insulating material 35 is fixed, and filling the space with the heat insulating material 33. . Since the vacuum heat insulating material 35 is fixed in contact with the convex portion 34 so that the contact with the inner wall surface of the inner box 32 is reduced, the heat insulating material 33 is insulated when the space between the convex portion 34 and the vacuum heat insulating material 35 is filled. If the flow of the material is poor, the gas that is likely to be generated is difficult to accumulate, and deformation of the inner box 32 due to the gas accumulation can be reduced.
[0046]
Similarly, the vacuum heat insulating material 41 is also adhesively fixed to the convex portion 37 of the outer box 31 and is not visible from the outside by the machine room cover 39, so that the deformation of the outer box 31 can be reduced and the appearance quality can be reduced. Can be maintained.
[0047]
(Embodiment 2)
FIG. 2 is a sectional view of a refrigerator according to Embodiment 2 of the present invention.
[0048]
In FIG. 2, 43 is a storage container drawer container formed in the refrigerator main body 30, 44 is a rail formed in the front-rear direction with respect to the refrigerator main body 30, and the drawer container 43 slides back and forth on the rail 44. It is placed to move. The rail 44 has a substantially U-shaped cross section, and the rail 44 is engaged with a convex portion 45 that protrudes the inner box 32 as an attachment portion toward the outer box 31.
[0049]
46 is a vacuum heat insulating material fixed in contact with the convex portion 45, and is installed on the side surface of the refrigerator main body 30. The core material 46b is inserted into the outer bag 46a in which an aluminum foil and a plastic film are laminated and heat-sealed. Is tightly sealed.
[0050]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.
[0051]
Since the vacuum heat insulating material 46 fixed to the side surface of the inner box 32 is adhesively fixed to the convex portion 45 of the rail 44 necessary for the drawer container 43 to slide, the heat insulation between the inner box 32 and the outer box 31 is achieved. The space is not unnecessarily thinned, and the amount of heat absorption is not increased.
[0052]
Further, since the vacuum heat insulating material 46 is fixed in contact only with the inner box 32 and the convex portion 45, when the heat insulating material 33 is filled between the convex portion 45 and the vacuum heat insulating material 46, the generated gas is separated from the convex portion 45. It is difficult to accumulate between the vacuum heat insulating material 46 and deformation of the inner box 32 due to gas accumulation can be reduced.
(Embodiment 3)
FIG. 3 is a perspective view of a vacuum heat insulating material according to Embodiment 3 of the present invention. FIG. 4 is a longitudinal sectional view of the refrigerator according to the embodiment.
[0053]
In FIGS. 3 and 4, reference numeral 47 denotes a vacuum heat insulating material, which is configured such that a core material 47b is inserted into an outer bag 47a in which an aluminum foil and a plastic film are laminated and tightly sealed by heat fusion. Reference numeral 48 denotes a through hole opened in the vacuum heat insulating material 47.
[0054]
Further, as shown in FIG. 4, a first air vent hole 50 is provided at a predetermined position on the back surface of the inner box 49. The diameter of the through hole 48 is formed to be equal to or larger than the diameter of the first air vent hole 50, and the diameter of the through hole 48 is actually 5 to 15 mm.
[0055]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.
[0056]
The vacuum heat insulating material 47 is contacted between the inner box 49 and the outer box 51 so that the first air vent hole 50 and the through hole 48 communicate with each other. 52 is applied and fixed to the inner box 49.
[0057]
When the foam heat insulating material 33 is injected, the air between the inner box 49 and the outer box 51 can be extracted from the through hole 48 into the inner box 32 through the first air vent hole 50. Therefore, the air between the vacuum heat insulating material 47 and the inner box 49 is completely discharged, no air pool is left, and the vacuum heat insulating material 47 and the inner box 49 are brought into close contact with each other.
[0058]
Further, as shown in FIG. 4, the outer box 51 is provided with a second air vent hole 53, and a vacuum heat insulating material 55 having a through hole 54 is contacted and fixed so as to communicate with the second air vent hole 53. At this time, an adhesive 52 is applied around the through hole 54 and fixed to the outer box 51.
[0059]
About the refrigerator comprised in this way, the operation | movement is demonstrated below.
[0060]
First, the foam heat insulating material 33 was injected by arranging the vacuum heat insulating material 55 so as to communicate the through hole 54 provided in the vacuum heat insulating material 55 and the second air vent hole 53 provided in the outer box 51. The air at the time can be extracted from the through hole 54 to the outside of the outer box 51 through the second air hole 53. Therefore, the air between the vacuum heat insulating material 55 and the outer box 51 is completely released to the outside, and there is no air pool.
[0061]
(Embodiment 4)
FIG. 5 is a central sectional view of the refrigerator according to the fourth embodiment.
[0062]
In FIG. 5, reference numeral 56 denotes a communication foam wound around the outer periphery of the through hole 48 of the vacuum heat insulating material 47. The through hole 48 communicates with the first air vent hole 50 provided in the inner box 49 through the communication form 56.
[0063]
When the foam heat insulating material 33 is injected, the heat insulating material 33 is filled between the outer box 51 and the inner box 49, and the vacuum heat insulating material 47 forms a slight space from the wall surface of the inner box by the communication foam 56. Therefore, the heat insulating material 33 is also filled in the space. At this time, by using the communication form 56, the distance between the inner box 49 and the vacuum heat insulation 47 is set to about 5 mm, which is the same as that of the convex portion 34 of the first embodiment, so that the fluidity of the heat insulating material 33 can be flowed.
[0064]
Further, the outer casing 51 can be prevented from being deformed in the same manner as when the inner box is provided by allowing the second air vent hole 53 and the through hole 54 to communicate with the outer casing 51 through the communication form 56. realizable.
[0065]
(Embodiment 5)
FIG. 6 is a longitudinal sectional view of an embodiment of a refrigerator according to the present invention. FIG. 7 is a detailed view of the lower part of the back surface with the machine room cover of the refrigerator of the same embodiment removed. 8 is a cross-sectional view taken along line AA in FIG. FIG. 9 is a perspective view of the vacuum heat insulating material affixed to the refrigerator of this embodiment. FIG. 10 is a perspective view showing a bent state of the vacuum heat insulating material of FIG.
[0066]
6, 7, and 8, reference numeral 57 denotes a refrigerator body, which is formed by an outer box 58 and a heat insulating box body 61 that is formed by filling a foamed polyurethane heat insulating material 60 between the inner boxes 59. The interior of the body 61 is divided into upper and lower parts by a partition plate 62 provided in the center, and the upper part of the partition plate 62 is a refrigeration chamber 64.
[0067]
The lower part of the partition plate 62 is divided vertically by a partition wall 63 configured to be filled with the urethane foam heat insulating material 60, the upper part is a refrigeration chamber 64, and the vegetable chamber 65 is between the partition wall 63 and the partition plate 62. The freezer compartment 66 is provided below the partition wall 63, that is, the lowermost part in the cabinet. The bottom wall 61A of the heat insulation box 61 has a shape in which the rear part rises stepwise. A machine room 67 is formed outside the rear part of the bottom wall 61A. A compressor 68 is installed and covered with a machine room cover 69. It has been broken.
[0068]
In addition, the bottom of the freezer compartment 66 is also shaped so that the rear part rises, so that the rear surface of the drawer container 70 of the freezer compartment 66 is located in front of the rear surface of the upper storage container 71.
[0069]
On the other hand, a vacuum heat insulating material 72 is attached to the vicinity of the compressor 68 and the inner surface of the outer box 58 forming the bottom plate 58 </ b> A, and is embedded in the heat insulating material 60.
[0070]
9 and 10, the vacuum heat insulating material 72 is formed by folding back a gas barrier film in which, for example, a heat welding layer made of polyethylene or polypropylene, an aluminum layer, and a surface protective layer are laminated, and the two sides are adhered to each other to form a heat welding layer. A bag is formed by welding each other, and in that state, a glass fiber or a square or rectangular plate-shaped core material made of open-cell foamed polyurethane insulation is inserted, and the inside of the bag is placed in a predetermined vacuum exhaust device. After the gas is evacuated to a vacuum state, the remaining one side of the heat-welded layer is welded to each other and sealed.
[0071]
After that, the vacuum heat insulating material 72 is provided with a linear compression portion 73, and the vacuum heat insulating material 72 that can be easily attached to the shape of the outer box 58 can be provided by bending the compression portion 73.
[0072]
About the refrigerator which consists of a heat insulation box provided with the vacuum heat insulating material comprised as mentioned above, the operation | movement is demonstrated below.
[0073]
As shown in FIGS. 6, 7, and 8, the vacuum heat insulating material 72 located in the vicinity of the compressor 68 is bent so as to cover the front and upper sides of the compressor 68, similar to the shape of the bottom plate 58 </ b> A. Therefore, the heat insulation performance effect can be effectively used for the heat generated in the compressor 68, and the power consumption can be reduced.
[0074]
In addition, since the thickness of the bottom wall 61A can be reduced, the depth 70A of the drawer container 70 can be increased, and the effective volume can be increased.
[0075]
On the other hand, the vacuum heat insulating material 72 may have a compression part 73 on both sides or one side, whereby it can be easily bent by the compression part 73, and the sealed bag-like heat welding layer is pulled and broken. There is no.
[0076]
Therefore, it is possible to approximate a complicated shape of the outer plate 58A while keeping a square or rectangular plate-shaped general-purpose vacuum heat insulating material in a vacuum state, and it can be easily attached.
[0077]
【The invention's effect】
As described above, according to the first aspect of the present invention, air accumulation can be eliminated and deformation of the inner box can be prevented.
[0084]
Further, the invention according to claim 2 can eliminate air accumulation and prevent deformation of the inner box.
[0085]
Further, the invention according to claim 2 can eliminate air accumulation and prevent deformation of the outer box.
[0086]
Further, the invention according to claim 3 can prevent deformation of the inner box or the outer box by preventing the foam heat insulating material from coming around the bonding surface.
[Brief description of the drawings]
1 is a central sectional view of a refrigerator according to a first embodiment of the present invention. FIG. 2 is a front sectional view of a refrigerator according to a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view of the refrigerator of the embodiment. FIG. 5 is a central sectional view of the refrigerator of the embodiment 4. FIG. 6 is a longitudinal sectional view of the refrigerator of the embodiment 5 of the invention. FIG. 8 is a cross-sectional view taken along the line AA in FIG. 7 and FIG. 9 is a perspective view of the vacuum heat insulating material attached to the refrigerator according to the embodiment. FIG. 10 is a perspective view showing a bent state of the vacuum heat insulating material of FIG. 9. FIG. 11 is a central sectional view of a conventional refrigerator. FIG. 12 is a central sectional view of a conventional refrigerator. [Explanation of symbols]
30 Outer box 31 Inner box 33 Foam heat insulating material 34 Protruding portion 35 Vacuum heat insulating material 47 Vacuum heat insulating material 48 Through hole 50 First air hole 51 Outer box 52 Adhesive 53 Second air hole 54 Through hole 55 Vacuum heat insulating material Material 56 Communication form 57 Refrigerator main body 68 Compressor 72 Vacuum heat insulating material 73 Compression section

Claims (3)

外箱と、内箱で形成される内部空間内に前記内箱に接触して備えられる真空断熱材と前記真空断熱材の周囲隙間に、ウレタン原液を注入・発泡した発泡断熱材を充填した冷蔵庫において、前記真空断熱材は前記内箱に備えられた空気抜け孔に連通する貫通孔を有し、前記空気抜け孔は前記貫通孔の孔より小さいことを特徴とする冷蔵庫。Refrigerator in which an outer casing and a vacuum insulating material provided in contact with the inner box in an inner space formed by the inner box and a foam insulating material in which a urethane stock solution is injected and foamed in a gap between the vacuum insulating material The vacuum heat insulating material has a through hole communicating with an air vent hole provided in the inner box, and the air vent hole is smaller than the hole of the through hole. 外箱と、内箱で形成される内部空間内に前記外箱に接触して備えられる真空断熱材と前記真空断熱材の周囲隙間に、ウレタン原液を注入・発泡した発泡断熱材を充填した冷蔵庫において、前記真空断熱材は前記外箱に備えられた空気抜け孔に連通する貫通孔を有し、前記空気抜け孔の径は前記貫通孔の径より小さいことを特徴とする冷蔵庫。A refrigerator filled with a foam heat insulating material in which a urethane stock solution is injected and foamed in a space around the vacuum heat insulating material and the vacuum heat insulating material provided in contact with the outer box in an inner space formed by the outer box and the inner box The vacuum heat insulating material has a through hole communicating with an air vent hole provided in the outer box, and the diameter of the air vent hole is smaller than the diameter of the through hole. 真空断熱材の貫通孔外周部の接着面を接着材で完全密封した請求項1または請求項2に記載の冷蔵庫。The refrigerator according to claim 1 or 2, wherein the adhesive surface of the outer peripheral portion of the through hole of the vacuum heat insulating material is completely sealed with an adhesive.
JP2000337123A 2000-11-06 2000-11-06 refrigerator Expired - Fee Related JP4238475B2 (en)

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