JP2004020148A

JP2004020148A - Refrigerator and manufacturing method of refrigerator

Info

Publication number: JP2004020148A
Application number: JP2002179595A
Authority: JP
Inventors: Hirokuni Imada; 今田　寛訓; Masato Sasaki; 佐々木　正人; Hidetomo Takanishi; 高西　英知; Shinichi Hashimoto; 橋本　晋一; Tsukasa Takushima; 宅島　司
Original assignee: Matsushita Refrigeration Co
Current assignee: Panasonic Holdings Corp
Priority date: 2002-06-20
Filing date: 2002-06-20
Publication date: 2004-01-22
Anticipated expiration: 2022-06-20
Also published as: JP3942962B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having no problem in a box body strength even if vacuum thermal insulation material is applied thereto at a high covering rate and having high thermal insulation performance. <P>SOLUTION: This refrigerator is disposed with vacuum thermal insulation materials 41, 43, 44, 44a, and 46 in the upper-part both sides, the top surface, the rear surface, the front surface in contact with an outer box 23, the bottom surface, and the bottom-part both sides and the sides comprising a machine chamber in contact with an inner box 22, so that the thermal insulation materials 43, 44, and 44a of the bottom-part both sides, the bottom surface and the machine chamber where the surface temperature of the outer box 23 becomes higher are prevented from being exposed to the high temperature. This constitution can suppress the time dependent deterioration of the vacuum thermal insulation performance to the minimum to improve the long-time reliability of the vacuum thermal insulation materials 43, 44, and 44a. The vacuum thermal insulation materials 44a in the bottom-part both sides are disposed in contact with the inner box 22 so as to avoid complicated fitting parts between the outer box 23 and piping and to be prevented from being broken. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、真空断熱材を備えた冷蔵庫及び冷蔵庫の製造方法に関するものである。
【０００２】
【従来の技術】
近年、冷蔵庫の省エネルギー化や省スペース化を狙いに、冷蔵庫の断熱性能を高める一手段として、高断熱性能を有する真空断熱材を利用する方法があり、省エネルギーの要請が益々高まる今日では、硬質ウレタンフォームと比較して数倍から１０倍程度の断熱性能を有する真空断熱材を適切な範囲内で最大限に利用することにより断熱性能を向上させていくことが急務であるといえる。
【０００３】
真空断熱材を備えた従来の冷蔵庫としては、特開平６ー１５９９２２号公報に開示されたものがある。
【０００４】
以下、図面を参照しながら上記従来の冷蔵庫について説明する。図１２は上記従来の冷蔵庫の側面断面図を示すものである。
【０００５】
図において、１は冷蔵庫本体で、外箱２と内箱３とで構成される空間全体を、成形可能な袋状の紙材４で覆い、この紙材４内部に無機多孔質からなる充填材５を充填し、内外箱２，３で囲まれた空間の形状に沿って真空断熱材６が構成されている。また、使用される真空断熱材は両面ともに金属箔を有し、形状は平面のみとなっている。
【０００６】
本構成により、内外箱２，３間への真空断熱材６の収納作業が容易に行えると共に内外箱２，３と真空断熱材６との隙間を塞ぐ作業などが廃止できるうえ、硬質ウレタンフォームを使用せず真空断熱材６のみで断熱箱体を構成できるため極めて高い断熱性能を確保することができる。
【０００７】
【発明が解決しようとする課題】
しかしながら、上記従来例に記載されている冷蔵庫では、硬質ウレタンフォームと比較して強度的に劣る真空断熱材６のみを使用した冷蔵庫であるため、断熱性能は高いものの強度的には非常に弱くなるといった問題があった。また、内箱や外箱の形状が平面的でないため、平面的でない部分への板状の真空断熱材の使用は困難であった。また、真空断熱材の断熱性能向上のためには、一平面にアルミ蒸着フィルムを用いた真空断熱材の使用が効果的であるが、信頼性の面からアルミ蒸着フィルムを用いた真空断熱材の使用は困難であった。板状の真空断熱材は、平面部分に貼付けていたが、被覆率向上のため放熱パイプ等の凹凸面への直接の貼付けが課題であった。
【０００８】
本発明は、上記課題に鑑み、真空断熱材を多く使用しても、箱体強度として問題がなく、真空断熱材の使用を容易にし、被覆率を低コストで上げることができる。よって、高い断熱性能を確保した冷蔵庫を低コストで提供するものである。
【０００９】
【課題を解決するための手段】
上記目的を達成するために本発明の請求項１に記載の冷蔵庫の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備え、下部に機械室を配設した冷蔵庫において、前記真空断熱材を、冷蔵庫の上部両側面、天面、背面、前面に対しては外箱に接し配設し、底面、下部両側面および前記機械室を構成する面に対しては内箱に接し配設するものである。
【００１０】
本発明によれば、真空断熱材を箱体内外の通過熱勾配の大きい箇所から配設して、真空断熱材の利用価値が高い状態で吸熱負荷量を効果的に抑え、省エネルギー効果を高めることができる。
【００１１】
さらに、真空断熱材を冷蔵庫の上部両側面、天面、背面、前面は外箱に接し配設し、底面および前記機械室を構成する面は内箱に接し配設しているので、外箱の表面温度が高くなる下部両側面、底面および機械室に配置した真空断熱材が高温にさらされることがなくなり、真空断熱性能の経時的な断熱性能の劣化を最低限に抑えることができ、真空断熱材の長期信頼性が高まる。
【００１２】
また、真空断熱材を下部両側面は内箱に接し配設しているので、外箱同士の複雑な嵌合部や配管を避けることができ、前記真空断熱材の破損を防止することができる。
【００１３】
さらに、真空断熱材は、箱体を構成する外箱、内箱のいずれかに接して配置しているので、硬質ウレタンフォームの形成する空間距離を充分確保できるので、硬質ウレタンフォームの荒れや発泡不足による断熱性能の低下を引き起こすことがないばかりか、箱体強度をも維持することができる。
【００１４】
また、本発明の請求項２に記載の冷蔵庫の発明は、請求項１に記載の発明において、内箱に接し配設する真空断熱材を、前記真空断熱材が接し配設される前記内箱の各面からはみ出ないように配設するものであり、内箱に接し配設した真空断熱材が、真空断熱材が接し配設される前記内箱の各面からはみ出ていないので、真空断熱材を所定箇所に配設した後で、外箱と内箱との間に硬質ウレタンフォームを流し込んだ場合に、内箱に配設された真空断熱材に対して、内箱から剥がす方向の力が加わらないため、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止でき、さらに、真空断熱材の貼付けの安定を容易に図ることができると同時に、硬質ウレタンフォームの流れ性を阻害しない。
【００１５】
また、本発明の請求項３に記載の冷蔵庫の発明は、請求項１または２に記載の発明において、真空断熱材が接し配設される内箱の面に、前記真空断熱材の端面の露出面積を減らすように、前記真空断熱材の外周を囲む凸部、または前記真空断熱材を収納する凹部を設けるものであり、凸部、または凹部により、真空断熱材を貼るときに位置決めが容易となり、真空断熱材の破れを防止することができる。さらに、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止することができる。また、凸部については、内箱と真空断熱材との段差が少なくなり、硬質ウレタンフォームの流れ性を阻害しない。凹部は内箱の金型の加工が容易である。さらに、凸部又は凹部はそれ自体が内箱の補強となり真空断熱材を貼付けやすい。
【００１６】
また、本発明の請求項４に記載の冷蔵庫の発明は、請求項１から３のいずれか一項に記載の発明において、冷却器の下方に、上面に除霜水処理のための所定の傾斜形状が形成され下面が平面状で内箱に密着する断熱部材を設けるものであり、この断熱部材により冷却器の下方に位置する内箱の面を平面にでき、この内箱の面に傾斜部がないため効率よく真空断熱材を貼ることができ、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止することができる。また、傾斜部が平面になることで、辺長が短くなり、真空断熱材を小さくすることができると共に辺長が短くなることで冷蔵庫内への吸熱負荷を低減できる。
【００１７】
また、本発明の請求項５に記載の冷蔵庫の発明は、請求項１から３のいずれか一項に記載の発明において、内箱における冷却器の下方に位置し除霜水処理のための所定の傾斜形状が形成される部分と、前記内箱に接し配設する真空断熱材との間に、前記内箱の前記部分と前記真空断熱材との間にできる隙間を埋める断熱部材を設けるものであり、この断熱部材により、真空断熱材を貼付ける面を平面にすることができ、真空断熱材を貼付ける面に傾斜部がないため効率よく真空断熱材を貼ることができ、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止することができる。また、傾斜部が平面になることで、辺長が短くなり、真空断熱材を小さくすることができると共に辺長が短くなることで冷蔵庫内への吸熱負荷を低減できる。さらに、あらかじめ、断熱部材に真空断熱材を配置し、箱体の組立てを行うことができ製造が容易である。
【００１８】
また、本発明の請求項６に記載の冷蔵庫の発明は、請求項１から５のいずれか一項に記載の発明において、内箱奥面に硬質ウレタンフォームの空気抜き用孔を設けるものであり、これまで、外箱背面に設けていた空気抜き用孔を、内箱奥面に設けるようにすることにより、外箱背面に真空断熱材を配設することができる。さらに、外箱に空気抜き用孔がなくなり外観の美しさを確保することができる。また、他の冷蔵庫の外箱背面を兼用することができ、部品点数と工数を削減することができる。
【００１９】
また、本発明の請求項７に記載の冷蔵庫の発明は、請求項１から６のいずれか一項に記載の発明において、上部両側面の外箱に接し配設する真空断熱材の下端の位置が、下部両側面の内箱に接し配設する真空断熱材の上端の位置より低くなるようにするものであり、真空断熱材を配設するときに、上下方向に多少ずれても、また、真空断熱材の寸法精度が低下しても、真空断熱材を外箱に接し配設する上部両側面と、真空断熱材を内箱に接し配設する下部両側面との境界部分において、外箱と内箱の少なくともどちらか一方に真空断熱材が存在するため、真空断熱材の断熱効果の低減を防止することができる。さらに、硬質ウレタンフォームの流れを阻害することなく安定した流れを可能とする。
【００２０】
また、本発明の請求項８に記載の冷蔵庫の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備えた冷蔵庫において、前記真空断熱材は、一方の面がアルミ蒸着フィルム、他方の面が金属箔を有するフィルムで構成され、前記アルミ蒸着フィルムと前記金属箔を有するフィルムのそれぞれの外周部分をシールしたシール面が前記真空断熱材における前記アルミ蒸着フィルム側の平面と同一平面上にあるものである。
【００２１】
本発明によれば、真空断熱材において、高い断熱性を必要とする一平面をアルミ蒸着フィルムで、高いガスバリヤ性を必要とする他の面を金属箔を有するフィルムで構成し、両フィルムのシール面をアルミ蒸着フィルム側の平面と同一平面上に位置させたので、シール面のヒレの処理が容易となるとともに、信頼性が高く断熱性能の優れた真空断熱材の利用が可能となる。
【００２２】
また、本発明の請求項９に記載の冷蔵庫の発明は、請求項８に記載の発明において、真空断熱材のアルミ蒸着フィルム側の平面を、外箱内側に接して配設するものであり、信頼性が高く断熱性能の優れた真空断熱材を効果的に配置でき、シール面のヒレの処理も必要なくなる。
【００２３】
また、本発明の請求項１０に記載の冷蔵庫の発明は、請求項８に記載の発明において、真空断熱材のアルミ蒸着フィルム側の平面を、内箱外側に接して配設するものであり、信頼性が高く断熱性能の優れた真空断熱材を効果的に配置でき、シール面のヒレの処理も必要なくなる。
【００２４】
また、本発明の請求項１１に記載の冷蔵庫の発明は、庫外まで配設されるシール材により放熱パイプを外箱内側に固定し、前記外箱との間に前記放熱パイプを挟むように、真空断熱材を前記外箱内側に配設するものである。
【００２５】
本発明によれば、放熱パイプの熱を真空断熱材で確実に断熱し、冷蔵庫内への吸熱負荷を効率的に減らすことができる。さらに、シール材が庫外まで配設されているので、放熱パイプと外箱との間の空気を自由に庫外へ移動でき、空気の熱収縮による外箱表面の凸凹や波打ちを抑えることができ、外観の美しさを維持することができる。さらに、放熱パイプと外箱間の空気量を気にすることがなく、放熱パイプの貼付け作業が容易にできる。
【００２６】
また、本発明の請求項１２に記載の冷蔵庫の発明は、請求項１１に記載の発明において、シール材は、分割もしくは孔が明けられているものである。
【００２７】
本発明によれば、放熱パイプと真空断熱材の間の空気も、自由に庫外へ移動でき、空気の熱収縮による外箱表面の凸凹や波打ちを抑えることができ、外観の美しさを維持することができる。さらに、放熱パイプと真空断熱材間の空気量を気にすることがなく、放熱パイプの貼付け作業が容易にできる。
【００２８】
また、本発明の請求項１３に記載の冷蔵庫の発明は、請求項１１に記載の発明において、放熱パイプは、冷蔵庫の天面となる箇所を避けて、外箱内側に配設するものである。
【００２９】
本発明によれば、放熱パイプの熱を真空断熱材で確実に断熱し、冷蔵庫内への吸熱負荷を低減させ、また、真空断熱材は硬質ウレタンフォームより断熱性能が良いことから、冷蔵庫としての吸熱量が低減されることで、天面に放熱パイプを配設しないことが可能となり、真空断熱材を容易に天面に貼付けることができ、省エネルギーの効果を高めることができる。また、天面に放熱パイプがないことで放熱パイプの形状がシンプルになり、加工性向上、工数削減、材料費低減ができる。さらに、天面に放熱パイプがないことで他の冷蔵庫の放熱パイプと兼用することも可能である。
【００３０】
また、本発明の請求項１４に記載の冷蔵庫の発明は、外箱に接する面に放熱パイプを組み込んだ真空断熱材を、前記外箱内側に配設するものであり、外箱と真空断熱材との間に放熱パイプを挟む前に放熱パイプを外箱内側に固定する場合よりも、放熱パイプと真空断熱材間の空隙を小さくすることができ、外箱表面の凸凹や波打ちを抑えることができ外観の美しさを維持することができる。また、真空断熱材の断熱効果を高め、省エネルギー効果を高めることができる。また、あらかじめ、放熱パイプを真空断熱材に配置し組立てを行うことができるので製造が容易となる。
【００３１】
また、本発明の請求項１５に記載の冷蔵庫の発明は、外箱と内箱との間に、硬質ウレタンフォームと、両面が金属箔を有するフィルムで構成された真空断熱材とを備えるものであり、両面のフィルムに高いガスバリヤ性のある金属箔を用いることにより、真空断熱材の両面が複雑な形状の面に接する場合であっても、信頼性が高い真空断熱材の利用が可能となる。また、両面が同一材料であるため、コスト低減ができる。さらに、両面が同一材であるため、外箱あるいは内箱に貼付ける時に真空断熱材の貼付面を間違える心配がなく作業が容易になる。
【００３２】
また、本発明の請求項１６に記載の冷蔵庫の発明は、外箱と内箱との間に真空断熱材を、前記真空断熱材のフィルムの封止代が硬質ウレタンフォームが流れ込む方向に位置しない状態で配設するものである。
【００３３】
本発明によれば、硬質ウレタンフォームの流れを阻害することなく安定した流れを可能とする。また、外箱と内箱間に注入する際の硬質ウレタンフォームは高湿状態であり、それが直接フィルムの封止代部に接しないことで熱ストレスを受けず、真空断熱材の劣化を防止することができる。さらに、封止代数が少なくなり真空断熱材は高いガスバリヤ性を維持することができる。
【００３４】
また、本発明の請求項１７に記載の冷蔵庫の発明は、外箱と内箱との間に配設される除霜水配管と前記内箱との間に、真空断熱材を配設するものであり、真空断熱材により除霜水の保温を図り、除霜水が冷やされて凍結することを防止することができる。
【００３５】
また、本発明の請求項１８に記載の冷蔵庫の発明は、外箱と内箱との間で、硬質ウレタンフォームの流れを阻害するおそれがある雑物がある所に真空断熱材を配設するものであり、真空断熱材により冷蔵庫の吸熱負荷を効果的に抑えることができ、省エネルギーの効果を高めることができる。また、硬質ウレタンフォームの流れ性を阻害してしまうおそれがある雑物がある所に真空断熱材を配設することで断熱性能を確保することができる。
【００３６】
また、本発明の請求項１９に記載の冷蔵庫の発明は、冷蔵庫の幅方向に平面が形成された内箱底面外側に、真空断熱材を接し配設するものであり、内箱底面の真空断熱材の貼付け面積を拡大すると同時に底面の面積を小さくすることができ、省エネルギー効果を高めることができる。さらに、真空断熱材の貼付け性の向上を図ることができる。
【００３７】
また、本発明の請求項２０に記載の冷蔵庫の製造方法の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備える冷蔵庫の製造方法において、真空断熱材を貼付け前に真空断熱材に接する面の異物を除去する工程を加えたものであり、異物による真空断熱材の破損をなくすことができ、貼付け工程の確実性が向上する。
【００３８】
また、本発明の請求項２１に記載の冷蔵庫の製造方法の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備え、外箱に前記真空断熱材を貼付ける冷蔵庫の製造方法において、端面を保護するように外箱端面に設けた保護部材を使って真空断熱材の位置決めを行うものである。
【００３９】
本発明によれば、外箱端面の保護用部材と真空断熱材の位置決め用部材との共用を図ることができる。また、真空断熱材の破損をなくすことができる。さらに、真空断熱材貼付け時の位置決めが容易になり、作業性の向上が図れる。
【００４０】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を参照しながら説明する。
【００４１】
（実施の形態１）
図１は、本発明の実施の形態１による冷蔵庫を左右に切断したとき左側部分を右側から見た様子を示す縦断面図を、図２は、同冷蔵庫を前後に切断したとき後部分を正面から見た様子を示す縦断面図を示す。
【００４２】
図１、図２において、２１は冷蔵庫本体であり、ＡＢＳなどの合成樹脂からなる内箱２２と鉄板などの金属からなる外箱２３とから形成される空間に硬質ウレタンフォーム２４が充填されている。３０は、冷蔵庫本体２１の後部下方に配置した機械室で、内部に圧縮機３１を配設している。３２は冷蔵用冷却器、３３は冷蔵用送風機、３４は冷凍用冷却器、３５は冷凍用送風機で、３６は、冷蔵庫本体２１の底面部に配設した凝縮器である。
【００４３】
冷蔵庫本体２１の前面開口部には、冷蔵室用扉３７、野菜室用扉３８、冷凍室用扉３９，４０が設けられている。４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０は真空断熱材で、硬質ウレタンフォーム２４とともに断熱箱体２１ａを構成している。
【００４４】
ここで、真空断熱材４１，４２，４４は、外箱２３のそれぞれ天面、背面、上部側面の内側に接して貼り付けられている。また、真空断熱材４３，４４ａ，４５は、内箱２２のそれぞれ底面、下部側面、機械室構成面に接して貼り付けられている。
【００４５】
また、冷蔵庫本体２１の前面開口部に配置する冷蔵室用扉３７、野菜室用扉３８、冷凍室用扉３９，４０の内部にはそれぞれ真空断熱材４７，４８，４９，５０が、各扉の外側鉄板に接するように配設されている。
【００４６】
本実施の形態の冷蔵庫は、外箱２３と内箱２２との間に硬質ウレタンフォーム２４と真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０とを備え、下部に機械室３０を配設した冷蔵庫において、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０を、冷蔵庫の上部両側面、天面、背面、前面に対しては外箱２３に接し配設し、底面、下部両側面および機械室３０を構成する面に対しては内箱２２に接し配設したものである。
【００４７】
本実施の形態によれば、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０を断熱箱体内外の通過熱勾配の大きい箇所から配設して、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０の利用価値が高い状態で吸熱負荷量を効果的に抑え、省エネルギー効果を高めることができる。
【００４８】
さらに、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０を冷蔵庫の上部両側面、天面、背面、前面は外箱２３に接し配設し、底面および機械室３０を構成する面は内箱２２に接し配設しているので、外箱２３の表面温度が高くなる下部両側面、底面および機械室に配置した真空断熱材４３，４４ａ，４５，４６が高温にさらされることがなくなり、真空断熱性能の経時的な断熱性能の劣化を最低限に抑えることができ、真空断熱材４３，４４ａ，４５，４６の長期信頼性が高まる。
【００４９】
また、下部両側面の真空断熱材４４ａは、内箱２２に接し配設しているので、外箱２３同士の複雑な嵌合部や配管を避けることができ、真空断熱材４４ａの破損を防止することができる。
【００５０】
さらに、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０は、冷蔵庫の断熱箱体を構成する外箱２３、内箱２２のいずれかに接して配置しているので、硬質ウレタンフォーム２４の形成する空間距離を充分確保できるので、硬質ウレタンフォーム２４の荒れや発泡不足による断熱性能の低下を引き起こすことがないばかりか、箱体強度をも維持することができる。
【００５１】
また、冷凍領域の冷凍室２８，２９を囲む硬質ウレタンフォーム２４と真空断熱材４２，４３，４４ａ，４５で形成される断熱箱体２１ａの断熱壁厚は、扉を除き、開口部の壁厚の薄い部分を含めて２５〜５０ｍｍの分布に、冷蔵領域の冷蔵室２６，野菜室２７を囲む硬質ウレタンフォーム２４と真空断熱材４１，４２，４４で形成される断熱箱体２１ａの断熱壁厚は、扉を除き、開口部の壁厚の薄い部分を含めて２５〜４０ｍｍの分布としている。
【００５２】
また、内箱２２に接し配設する真空断熱材４３，４４ａ，４５，４６は、投影面積で内箱２２より小さいものである。換言すれば、内箱２２に接し配設した真空断熱材４３，４４ａ，４５，４６は、真空断熱材４３，４４ａ，４５，４６が接し配設される内箱２２の各面からはみ出ていない。
【００５３】
本実施の形態の冷蔵庫は、内箱２２に接し配設した真空断熱材４３，４４ａ，４５，４６が、真空断熱材４３，４４ａ，４５，４６が接し配設される内箱２２の各面からはみ出ていないので、真空断熱材４３，４４ａ，４５，４６を所定箇所に配設した後で、外箱２３と内箱２２との間に硬質ウレタンフォーム２４を流し込んだ場合に、内箱２２に配設された真空断熱材４３，４４ａ，４５，４６に対して、内箱２２から剥がす方向の力が加わらないため、硬質ウレタンフォーム２４の流入による真空断熱材４３，４４ａ，４５，４６の剥がれを防止でき、さらに、真空断熱材４３，４４ａ，４５，４６の貼付けの安定を容易に図ることができると同時に、硬質ウレタンフォーム２４の流れ性を阻害しない。
【００５４】
また、真空断熱材４３，４４ａ，４５が接し配設される内箱２２の面には、真空断熱材４３，４４ａ，４５の端面の露出面積を減らすように、真空断熱材４３，４４ａ，４５の外周を囲む凸部、または真空断熱材４３，４４ａ，４５を収納する凹部が設けられている。
【００５５】
本実施の形態では、上記の凸部、または凹部により、真空断熱材４３，４４ａ，４５を貼るときに位置決めが容易となり、真空断熱材４３，４４ａ，４５の破れを防止することができる。さらに、硬質ウレタンフォーム２４の流入による真空断熱材４３，４４ａ，４５の剥がれを防止することができる。また、凸部の場合は、内箱２２と真空断熱材４３，４４ａ，４５との段差が少なくなり、硬質ウレタンフォーム２４の流れ性を阻害しない。凹部の場合は、内箱２２の金型の加工が容易である。さらに、凸部又は凹部はそれ自体が内箱２２の補強となり真空断熱材４３，４４ａ，４５を貼付けやすい。
【００５６】
また、冷却部３４下部に真空断熱材４５を配設する場合は、冷却器３５下部もしくは、内箱２２に断熱部材を配置し、平面形状を確保している。
【００５７】
ここで、冷却器３４下部に配置される断熱部材は、冷却器３４の下方に設けられる、上面に除霜水処理のための所定の傾斜形状が形成され下面が平面状で内箱２２に密着する断熱部材である。
【００５８】
この断熱部材により冷却器３４の下方に位置する内箱２２の面を平面にでき、この内箱２２の面に傾斜部がないため効率よく真空断熱材４５を貼ることができ、硬質ウレタンフォーム２４の流入による真空断熱材４５の剥がれを防止することができる。また、傾斜部が平面になることで、辺長が短くなり、真空断熱材４５を小さくすることができると共に辺長が短くなることで冷蔵庫内への吸熱負荷を低減できる。
【００５９】
また、冷却部３４下部の内箱２２に配置される断熱部材は、内箱２２における冷却器３４の下方に位置し除霜水処理のための所定の傾斜形状が形成される部分と、内箱２２に接し配設する真空断熱材４５との間に、内箱２２の所定の傾斜形状が形成される部分と真空断熱材４５との間にできる隙間を埋める断熱部材である。
【００６０】
この断熱部材により、真空断熱材４５を貼付ける面を平面にすることができ、真空断熱材４５を貼付ける面に傾斜部がないため効率よく真空断熱材４５を貼ることができ、硬質ウレタンフォーム２４の流入による真空断熱材４５の剥がれを防止することができる。また、傾斜部が平面になることで、辺長が短くなり、真空断熱材４５を小さくすることができると共に辺長が短くなることで冷蔵庫内への吸熱負荷を低減できる。さらに、あらかじめ、断熱部材に真空断熱材４５を配置し、箱体の組立てを行うことができ製造が容易である。
【００６１】
また、内箱２２奥面には硬質ウレタンフォーム２４の空気抜き用孔２２ａが設けられている。これまで、外箱２３背面に設けていた空気抜き用孔を、内箱２２奥面に設けるようにすることにより、外箱２３背面に真空断熱材４２を配設することができる。さらに、外箱２３に空気抜き用孔がなくなり外観の美しさを確保することができる。また、他の冷蔵庫の外箱背面を兼用することができ、部品点数と工数を削減することができる。
【００６２】
また、真空断熱材４４と真空断熱材４４ａの境界部は真空断熱材４４と真空断熱材４４ａが重なり合っている。
【００６３】
本実施の形態では、冷蔵庫本体２１の上部両側面の外箱２３に接し配設する真空断熱材４４の下端の位置が、下部両側面の内箱２２に接し配設する真空断熱材４４ａの上端の位置より低くなるようにしているので、冷蔵庫本体２１の両側面に真空断熱材４４，４４ａを配設するときに、上下方向に多少ずれても、また、真空断熱材４４，４４ａの寸法精度が低下しても、真空断熱材４４を外箱２３に接し配設する上部両側面と、真空断熱材４４ａを内箱２２に接し配設する下部両側面との境界部分において、外箱２３と内箱２２の少なくともどちらか一方に真空断熱材４４（４４ａ）が存在するため、真空断熱材４４，４４ａの断熱効果の低減を防止することができる。さらに、硬質ウレタンフォーム２４の流れを阻害することなく安定した流れを可能とする。
【００６４】
また、真空断熱材４３，４５の貼付けが容易で効果的になるよう内箱２２は幅方向に平面となっている。
【００６５】
本実施の形態では、冷蔵庫の幅方向に平面が形成された内箱２２底面外側に、真空断熱材４３，４５を接し配設するものであり、内箱２２底面の真空断熱材４３，４５の貼付け面積を拡大すると同時に底面の面積を小さくすることができ、省エネルギー効果を高めることができる。さらに、真空断熱材４３，４５の貼付け性の向上を図ることができる。
【００６６】
また、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０を配設するときは、貼付け前に貼付け面から異物を除去する。
【００６７】
本実施の形態では、真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０を貼付け前に真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０に接する面の異物を除去する工程を加えることにより、　　異物による真空断熱材４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０の破損をなくすことができ、貼付け工程の確実性が向上する。
【００６８】
図３は、本実施の形態の冷蔵庫に適用する真空断熱材の要部拡大縦断面図、図４、図５は同実施の形態の冷蔵庫の部分断面拡大図である。
【００６９】
図において、４４，４４ａは真空断熱材で、内部に芯材５２を有する。芯材５２はグラスウールなどの無機繊維集合体を加熱乾燥後、蒸着層フィルム５３と金属箔層フィルム５７を貼り合わせた外被材中に挿入し、内部を真空引きして開口部を封止することにより形成されている。
【００７０】
蒸着層フィルム５３は、アルミ蒸着フィルム５５をナイロンフィルム５４と高密度ポリエチレンフィルム６０とで挟み込んだ複合プラスチックフィルムで、金属箔層フィルム５７は、アルミ箔５９をナイロンフィルム５８と高密度ポリエチレンフィルム６０とで挟み込んだ複合プラスチックフィルムである。
【００７１】
また、蒸着層フィルム５３と金属箔層フィルム５７とのシール面は蒸着層フィルム５３側を一平面状とし、金属箔層フィルム５７側の面を立体的に構成している。そして、蒸着層フィルム５３側を外箱２３もしくは内箱２２に接して配置している。
【００７２】
本実施の形態の真空断熱材４４，４４ａは、一方の面がアルミ蒸着フィルム５５を有する蒸着層フィルム５３、他方の面が金属箔（アルミ箔）５９を有する金属箔層フィルム５７で構成され、蒸着層フィルム５３と金属箔層フィルム５７のそれぞれの外周部分をシールしたシール面が真空断熱材４４，４４ａにおける蒸着層フィルム５３の平面と同一平面上にあるものであり、真空断熱材４４，４４ａにおいて、高い断熱性を必要とする一平面をアルミ蒸着フィルム５５を有する蒸着層フィルム５３で、高いガスバリヤ性を必要とする他の面を金属箔（アルミ箔）５９を有する金属箔層フィルム５７で構成し、両フィルム５３，５７のシール面を蒸着層フィルム５３側の平面と同一平面上に位置させたので、シール面のヒレの処理が容易となるとともに、信頼性が高く断熱性能の優れた真空断熱材４４，４４ａの利用が可能となる。
【００７３】
また、本実施の形態は、図４に示すように、真空断熱材４４の蒸着層フィルム５３側の平面を、外箱２３内側に接して配設するものであり、信頼性が高く断熱性能の優れた真空断熱材４４を効果的に配置でき、シール面のヒレの処理も必要なくなる。
【００７４】
また、本実施の形態は、図５に示すように、真空断熱材４４ａの蒸着層フィルム５３側の平面を、内箱２２外側に接して配設するものであり、信頼性が高く断熱性能の優れた真空断熱材４４ａを効果的に配置でき、シール面のヒレの処理も必要なくなる。
【００７５】
また、内箱２２および外箱２３両側共、形状が複雑で真空断熱材が貼付けられない、または、真空断熱材の信頼性確保が重要となる部位には両面共金属箔フィルムを有する真空断熱材を使用する。
【００７６】
真空断熱材を構成する両面のフィルムに高いガスバリヤ性のある金属箔（金属箔フィルム）を用いることにより、真空断熱材の両面が複雑な形状の面に接する場合であっても、信頼性が高い真空断熱材の利用が可能となる。また、両面が同一材料であるため、コスト低減ができる。さらに、両面が同一材であるため、外箱２３あるいは内箱２２に貼付ける時に真空断熱材の貼付面を間違える心配がなく作業が容易になる。
【００７７】
ここで、無機繊維集合体５２の繊維径は０．１μｍ〜１．０μｍの範囲のものを使用し、硬質ウレタンフォーム２４の熱伝導率を０．０１５Ｗ／ｍＫとしたときに、同様の測定基準による熱伝導率が０．００１５Ｗ／ｍＫである断熱材として真空断熱材４４，４４ａを適用している。つまり、硬質ウレタンフォーム２４に比べ断熱性能が１０倍高い真空断熱材４４，４４ａを適用している。
【００７８】
以上の構成において、圧縮機３１、冷蔵用冷却器３２、冷蔵用送風機３３、冷凍用冷却器３４、冷凍用送風機３５、凝縮器３６からなる冷却装置により、冷蔵室２６、野菜室２７は概ね０〜１０℃、冷凍室２８，２９は概ね−１５〜−２５℃の温度に冷却される。
【００７９】
そして、真空断熱材４４を上部両側面、真空断熱材４１を天面、真空断熱材４２を背面、真空断熱材４７，４８，４９，５０を前面である扉体の外箱に接して配設し、底面、下部両側面および機械室３０を構成する面には真空断熱材４３、真空断熱材４４ａおよび真空断熱材４５を内箱２２に接し配設したので、外箱２３の表面温度が高くなる底面および機械室３０に配置した真空断熱材４３，４５が高温にさらされることがなくなり、真空断熱性能の経時的な断熱性能の劣化を最低限に抑えることができ、真空断熱材の長期信頼性が高まる。また、外箱の形状が複雑となる下部両側面には真空断熱材４４ａを内箱に接して配設することにより、信頼性を高めることできる。
【００８０】
さらに、真空断熱材は、断熱箱体２１ａを構成する外箱２２、内箱２３のいずれかに接して配置しているので、硬質ウレタンフォーム２４の形成する空間距離を充分確保でき、硬質ウレタンフォーム２４の荒れや発泡不足による断熱性能の低下を引き起こすことがないばかりか、箱体強度をも維持することができる。
【００８１】
また、天面の真空断熱材４１は外箱２３に接して配設しているので、庫内照明用取り付け部材あるいは電線（図示せず）を内箱２２の天面に取り付け可能となり、冷蔵室２６の天面に照明を設けることができ、使い勝手の向上が図れる。
【００８２】
また、冷凍領域の冷凍室２８，２９を囲む硬質ウレタンフォーム２４と真空断熱材４２，４３，４４ａ，４５で形成される断熱箱体２１ａの断熱壁厚は、扉を除き、開口部の壁厚の薄い部分を含めて２５〜５０ｍｍの分布に、冷蔵領域の冷蔵室２６，野菜室２７を囲む硬質ウレタンフォーム２４と真空断熱材４１，４２，４４で形成される断熱箱体２１ａの断熱壁厚は、扉を除き、開口部の壁厚の薄い部分を含めて２５〜４０ｍｍの分布としており、この断熱壁厚中に厚さ１０〜１５ｍｍの真空断熱材が配設されるので、硬質ウレタンフォーム２４の充填される厚みが最低１０ｍｍ確保される。このため硬質ウレタンフォーム２４の発泡時の流動性を妨げることなく、フォームの荒れや充填不良による断熱性の低下を引き起こさない。
【００８３】
このように、真空断熱材の厚みを確保して断熱性を十分に発揮させながら硬質ウレタンフォーム２４の断熱性も維持して複層断熱壁としての断熱性能を効果的に高めることができる。特に、庫内外の温度勾配が大きい冷凍温度領域においては一層効果的である。
【００８４】
そして、冷凍室２８，２９の断熱壁厚を５０ｍｍを超えないようにすることで、真空断熱材の適用を比較的容積比率の小さい冷凍室２８，２９の内容積を外観レイアウトに影響を与えないで増加させることにも活用でき、真空断熱材の利用価値をより高めることができる。
【００８５】
また、冷蔵室２６，野菜室２７の断熱壁厚を４０ｍｍを超えないようにすることで、庫内外の温度勾配が比較的小さい冷蔵温度領域において、真空断熱材の適用による省エネルギー化と断熱箱体２１ａ内外の内容積効率向上の効果のバランスをとることができる。
【００８６】
また、真空断熱材４２は背面パネルにあらかじめ配設した後、平板をコの字状に折り曲げて成形した側面および天面に接合して、外箱２３を形成し、外箱２３形成の継ぎ目近傍に位置するように配設しているので、真空断熱材４２の端面を背面パネルのほぼ同等の大きさに配置でき、断熱性能が高まるとともに、真空断熱材をあらかじめ外箱２３あるいは内箱２２に真空断熱材を配置し箱体の組立てを行うことができるので、製造が容易となる。
【００８７】
また、真空断熱材４１は、一平面が蒸着層フィルム５３、他面を金属箔層フィルム５７としたものであり、フィルムのシール面が真空断熱材４１本体の一面と同一面となり、シール面のヒレの処理が容易となるとともに、信頼性が高く断熱性能の優れた真空断熱材の利用が可能となる。
【００８８】
また、真空断熱材４１の、金属箔に比べて熱伝導の悪い（断熱性能の良い）アルミ蒸着フィルム側を、外箱内側に接して配設したものであり、外箱２３と真空断熱材４１の伝熱が抑えられて、庫外からの吸熱を低減し、信頼性が高く断熱性能の優れた真空断熱材を効果的に断熱壁内に配置でき、シール面のヒレの処理も必要なくなる。
【００８９】
なお、断熱箱体２１ａの背面に真空断熱材４２を配設することにより、真空断熱材４２が冷却装置の配管や冷蔵用冷却器３２、冷凍用冷却器３４の除霜水を排水するドレン管（図示せず）の邪魔になるといった問題を解決できるとともに、背面パネルと真空断熱材４２を一体品として組み立てることができ、製造工程上好ましくなるという効果も有する。
【００９０】
（実施の形態２）
図６は、本発明の実施の形態２による冷蔵庫の横断面図、図７は、同実施の形態の冷蔵庫の放熱パイプ近傍の部分拡大図である。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その説明を省略し、異なる点についてのみ説明する。
【００９１】
図において、６１は冷凍サイクルの一部をなす凝縮器としての放熱パイプで、外箱２３の側面あるいは背面に接して配設し、その上面より熱伝導の良いアルミテープ６２で外箱２３に固定されている。そして放熱パイプ６１を覆うように真空断熱材４４が配設されている。さらに、アルミテープ６２は庫外まで配設されており、途中で分割もしくは孔が設けられている。
【００９２】
本実施の形態は、庫外まで配設されるシール材（アルミテープ）６２により放熱パイプ６１を外箱２３内側に固定し、外箱２３との間に放熱パイプ６１を挟むように、真空断熱材４４を外箱２３内側に配設するものであり、放熱パイプ６１の熱を真空断熱材４４で確実に断熱し、冷蔵庫内への吸熱負荷を効率的に減らすことができる。さらに、シール材（アルミテープ）６２が庫外まで配設されているので、放熱パイプ６１と外箱２３との間の空気を自由に庫外へ移動でき、空気の熱収縮による外箱２３表面の凸凹や波打ちを抑えることができ、外観の美しさを維持することができる。さらに、放熱パイプ６１と外箱２３間の空気量を気にすることがなく、放熱パイプ６１の貼付け作業が容易にできる。
【００９３】
また、本実施の形態のシール材（アルミテープ）６２は、庫外まで配設される途中で分割もしくは孔が明けられているので、放熱パイプ６１と真空断熱材４４の間の空気も、自由に庫外へ移動でき、空気の熱収縮による外箱２３表面の凸凹や波打ちを抑えることができ、外観の美しさを維持することができる。さらに、放熱パイプ６１と真空断熱材４４間の空気量を気にすることがなく、放熱パイプ６１の貼付け作業が容易にできる。
【００９４】
また、放熱パイプ６１を設置するときに、真空断熱材４４にあらかじめ組込んでおき、外箱２３に設置しても構わない。
【００９５】
この場合、外箱２３に接する面に放熱パイプ６１を組み込んだ真空断熱材４４を、外箱２３内側に配設するので、外箱２３と真空断熱材４４との間に放熱パイプ６１を挟む前に放熱パイプ６１を外箱２３内側に固定する場合（図７参照）よりも、放熱パイプ６１と真空断熱材４４間の空隙を小さくすることができ、外箱２３表面の凸凹や波打ちを抑えることができ外観の美しさを維持することができる。また、真空断熱材４４の断熱効果を高め、省エネルギー効果を高めることができる。また、あらかじめ、放熱パイプ６１を真空断熱材４４に配置し組立てを行うことができるので製造が容易となる。
【００９６】
以上の構成において、外箱２３と真空断熱材４４の間に放熱パイプ６１をはさんで取り付けているので、放熱パイプ６１の熱を真空断熱材４４で確実に断熱し、冷蔵庫内への吸熱負荷を効率的に減らすことができる。
【００９７】
（実施の形態３）
図８は、本発明の実施の形態３による冷蔵庫の外箱平板の折り曲げ前の斜視図である。なお、実施の形態１から３と同一構成については同一符号を付してその説明を省略し、異なる点についてのみ説明する。
【００９８】
図において、６１は冷凍サイクルの一部をなす凝縮器としての放熱パイプで、外箱２３の側面となる面６７に接して配設し、天面となる面６６には放熱パイプ６１を配設しないものである。換言すれば、放熱パイプ６１は、冷蔵庫の天面となる箇所を避けて、外箱２３内側に配設するものである。
【００９９】
本実施の形態では、上記構成により、放熱パイプ６１の熱を真空断熱材４４で確実に断熱し、冷蔵庫内への吸熱負荷を低減させ、また、真空断熱材４４は硬質ウレタンフォーム２４より断熱性能が良いことから、冷蔵庫としての吸熱量が低減されることで、天面に放熱パイプ６１を配設しないことが可能となり、真空断熱材４１を容易に天面に貼付けることができ、省エネルギーの効果を高めることができる。
【０１００】
また、天面に放熱パイプ６１がないことで放熱パイプ６１の形状がシンプルになり、加工性向上、工数削減、材料費低減ができる。さらに、天面に放熱パイプ６１がないことで他の冷蔵庫の放熱パイプ６１と兼用することも可能である。
【０１０１】
（実施の形態４）
図９は、本発明の実施の形態４による冷蔵庫の要部拡大図である。なお、実施の形態１から３と同一構成については同一符号を付してその説明を省略し、異なる点についてのみ説明する。
【０１０２】
図において、４４は真空断熱材で、外箱２３に接して配設し、硬質ウレタンフォーム２４が流れ込む方向には真空断熱材４４のフィルム封止代を設けない。換言すれば、外箱２３と内箱２２との間に真空断熱材４４を、真空断熱材４４のフィルムの封止代が硬質ウレタンフォーム２４が流れ込む方向に位置しない状態で配設するものである。
【０１０３】
以上の構成より、真空断熱材４４が硬質ウレタンフォーム２４の流れを阻害することなく安定した流れを可能とする。
【０１０４】
さらに、外箱２３と内箱２２間に注入する際の硬質ウレタンフォーム２４は高湿状態であり、それが直接フィルムの封止代部に接しないことで熱ストレスを受けず、真空断熱材４４の劣化を防止することができる。
【０１０５】
さらに、封止代数が少なくなり真空断熱材４４は高いガスバリヤ性を維持することができる。
【０１０６】
（実施の形態５）
図１０は、本発明の実施の形態５による冷蔵庫の要部断面図である。なお、実施の形態１から４と同一構成については同一符号を付してその説明を省略し、異なる点についてのみ説明する。
【０１０７】
図において、７２は除霜水配管で、真空断熱材４４ａは除霜水配管７２や配線等（図示せず）雑物がある所から、優先的に配置する。
【０１０８】
本実施の形態は、外箱２３と内箱２２との間で、硬質ウレタンフォーム２４の流れを阻害するおそれがある雑物（除霜水配管７２や配線等）がある所に真空断熱材４４ａを配設するものであり、真空断熱材４４ａにより冷蔵庫の吸熱負荷を効果的に抑えることができ、省エネルギーの効果を高めることができる。また、硬質ウレタンフォーム２４の流れ性を阻害してしまうおそれがある雑物がある所に真空断熱材４４ａを配設することで断熱性能を確保することができる。
【０１０９】
また、除霜水配管７２を設置するときは、真空断熱材４４と外箱２３との間に設置する。
【０１１０】
本実施の形態は、外箱２３と内箱２２との間に配設される除霜水配管７２と内箱２２との間に、真空断熱材４４ａを配設するものであり、真空断熱材４４ａにより除霜水の保温を図り、冷凍室２８，２９の庫内温度の影響で除霜水が冷やされて凍結することを防止することができる。
【０１１１】
（実施の形態６）
図１１は、本発明の実施の形態６による冷蔵庫の要部断面図である。なお、実施の形態１から５と同一構成については同一符号を付してその説明を省略し、異なる点についてのみ説明する。
【０１１２】
図において、７３は外箱２３端面を保護する保護部材で、保護部材７３を真空断熱材４４を貼付けるときの位置決め部材と兼用している。
【０１１３】
本実施の形態は、外箱２３と内箱２２との間に硬質ウレタンフォーム２４と真空断熱材とを備え、外箱２３に真空断熱材を貼付ける冷蔵庫の製造方法において、端面を保護するように外箱２３端面に設けた保護部材７３を使って真空断熱材４４の位置決めを行うので、外箱２３端面の保護用部材７３と真空断熱材４４の位置決め用部材との共用を図ることができる。また、真空断熱材４４の破損をなくすことができる。さらに、真空断熱材４４貼付け時の位置決めが容易になり、作業性の向上が図れる。
【０１１４】
【発明の効果】
以上説明したように本発明の請求項１に記載の冷蔵庫の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備え、下部に機械室を配設した冷蔵庫において、前記真空断熱材を、冷蔵庫の上部両側面、天面、背面、前面に対しては外箱に接し配設し、底面、下部両側面および前記機械室を構成する面に対しては内箱に接し配設したことにより、真空断熱材の利用価値が高い状態で吸熱負荷量を効果的に抑え、省エネルギー効果を高めることができる。
【０１１５】
さらに、外箱の表面温度が高くなる下部両側面、底面および機械室に配置した真空断熱材が高温にさらされることがなくなり、真空断熱性能の経時的な断熱性能の劣化を最低限に抑えることができ、真空断熱材の長期信頼性が高まる。また、真空断熱材を下部両側面は内箱に接し配設しているので、外箱同士の複雑な嵌合部や配管を避けることができ、真空断熱材の破損を防止することができる。
【０１１６】
さらに、真空断熱材は、箱体を構成する外箱、内箱のいずれかに接して配置しているので、硬質ウレタンフォームの形成する空間距離を充分確保できるので、硬質ウレタンフォームの荒れや発泡不足による断熱性能の低下を引き起こすことがないばかりか、箱体強度をも維持することができる。
【０１１７】
また、本発明の請求項２に記載の冷蔵庫の発明は、請求項１に記載の発明において、内箱に接し配設する真空断熱材を、前記真空断熱材が接し配設される前記内箱の各面からはみ出ないように配設することにより、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止でき、さらに、真空断熱材の貼付けの安定を容易に図ることができると同時に、硬質ウレタンフォームの流れ性を阻害しない。
【０１１８】
また、本発明の請求項３に記載の冷蔵庫の発明は、請求項１または２に記載の発明において、真空断熱材が接し配設される内箱の面に、前記真空断熱材の端面の露出面積を減らすように、前記真空断熱材の外周を囲む凸部、または前記真空断熱材を収納する凹部を設けることにより、真空断熱材を貼るときに位置決めが容易となり、真空断熱材の破れを防止することができる。さらに、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止することができる。また、凸部については、内箱と真空断熱材との段差が少なくなり、硬質ウレタンフォームの流れ性を阻害しない。凹部は内箱の金型の加工が容易である。さらに、凸部又は凹部はそれ自体が内箱の補強となり真空断熱材を貼付けやすい。
【０１１９】
また、本発明の請求項４に記載の冷蔵庫の発明は、請求項１から３のいずれか一項に記載の発明において、冷却器の下方に、上面に除霜水処理のための所定の傾斜形状が形成され下面が平面状で内箱に密着する断熱部材を設けることにより、冷却器の下方に位置する内箱の面を平面にでき、この内箱の面に傾斜部がないため効率よく真空断熱材を貼ることができ、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止することができる。また、傾斜部が平面になることで、辺長が短くなり、真空断熱材を小さくすることができると共に辺長が短くなることで冷蔵庫内への吸熱負荷を低減できる。
【０１２０】
また、本発明の請求項５に記載の冷蔵庫の発明は、請求項１から３のいずれか一項に記載の発明において、内箱における冷却器の下方に位置し除霜水処理のための所定の傾斜形状が形成される部分と、前記内箱に接し配設する真空断熱材との間に、前記内箱の前記部分と前記真空断熱材との間にできる隙間を埋める断熱部材を設けることにより、真空断熱材を貼付ける面を平面にすることができ、真空断熱材を貼付ける面に傾斜部がないため効率よく真空断熱材を貼ることができ、硬質ウレタンフォームの流入による真空断熱材の剥がれを防止することができる。また、傾斜部が平面になることで、辺長が短くなり、真空断熱材を小さくすることができると共に辺長が短くなることで冷蔵庫内への吸熱負荷を低減できる。さらに、あらかじめ、断熱部材に真空断熱材を配置し、箱体の組立てを行うことができ製造が容易である。
【０１２１】
また、本発明の請求項６に記載の冷蔵庫の発明は、請求項１から５のいずれか一項に記載の発明において、内箱奥面に硬質ウレタンフォームの空気抜き用孔を設けることにより、外箱背面に真空断熱材を配設することができる。さらに、外箱に空気抜き用孔がなくなり外観の美しさを確保することができる。また、他の冷蔵庫の外箱背面を兼用することができ、部品点数と工数を削減することができる。
【０１２２】
また、本発明の請求項７に記載の冷蔵庫の発明は、請求項１から６のいずれか一項に記載の発明において、上部両側面の外箱に接し配設する真空断熱材の下端の位置が、下部両側面の内箱に接し配設する真空断熱材の上端の位置より低くなるようにすることにより、真空断熱材を配設するときに、上下方向に多少ずれても、また、真空断熱材の寸法精度が低下しても、真空断熱材を外箱に接し配設する上部両側面と、真空断熱材を内箱に接し配設する下部両側面との境界部分において、外箱と内箱の少なくともどちらか一方に真空断熱材が存在するため、真空断熱材の断熱効果の低減を防止することができる。さらに、硬質ウレタンフォームの流れを阻害することなく安定した流れを可能とする。
【０１２３】
また、本発明の請求項８に記載の冷蔵庫の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備えた冷蔵庫において、前記真空断熱材は、一方の面がアルミ蒸着フィルム、他方の面が金属箔を有するフィルムで構成され、前記アルミ蒸着フィルムと前記金属箔を有するフィルムのそれぞれの外周部分をシールしたシール面が前記真空断熱材における前記アルミ蒸着フィルム側の平面と同一平面上にあるものであり、真空断熱材において、高い断熱性を必要とする一平面をアルミ蒸着フィルムで、高いガスバリヤ性を必要とする他の面を金属箔を有するフィルムで構成し、両フィルムのシール面をアルミ蒸着フィルム側の平面と同一平面上に位置させたので、シール面のヒレの処理が容易となるとともに、信頼性が高く断熱性能の優れた真空断熱材の利用が可能となる。
【０１２４】
また、本発明の請求項９に記載の冷蔵庫の発明は、請求項８に記載の発明において、真空断熱材のアルミ蒸着フィルム側の平面を、外箱内側に接して配設することにより、信頼性が高く断熱性能の優れた真空断熱材を効果的に配置でき、シール面のヒレの処理も必要なくなる。
【０１２５】
また、本発明の請求項１０に記載の冷蔵庫の発明は、請求項８に記載の発明において、真空断熱材のアルミ蒸着フィルム側の平面を、内箱外側に接して配設することにより、信頼性が高く断熱性能の優れた真空断熱材を効果的に配置でき、シール面のヒレの処理も必要なくなる。
【０１２６】
また、本発明の請求項１１に記載の冷蔵庫の発明は、庫外まで配設されるシール材により放熱パイプを外箱内側に固定し、前記外箱との間に前記放熱パイプを挟むように、真空断熱材を前記外箱内側に配設することにより、放熱パイプの熱を真空断熱材で確実に断熱し、冷蔵庫内への吸熱負荷を効率的に減らすことができる。さらに、シール材が庫外まで配設されているので、放熱パイプと外箱との間の空気を自由に庫外へ移動でき、空気の熱収縮による外箱表面の凸凹や波打ちを抑えることができ、外観の美しさを維持することができる。さらに、放熱パイプと外箱間の空気量を気にすることがなく、放熱パイプの貼付け作業が容易にできる。
【０１２７】
また、本発明の請求項１２に記載の冷蔵庫の発明は、請求項１１に記載の発明におけるシール材に、分割もしくは孔が明けられているものを用いることにより、放熱パイプと真空断熱材の間の空気も、自由に庫外へ移動でき、空気の熱収縮による外箱表面の凸凹や波打ちを抑えることができ、外観の美しさを維持することができる。さらに、放熱パイプと真空断熱材間の空気量を気にすることがなく、放熱パイプの貼付け作業が容易にできる。
【０１２８】
また、本発明の請求項１３に記載の冷蔵庫の発明は、請求項１１に記載の発明において、放熱パイプは、冷蔵庫の天面となる箇所を避けて、外箱内側に配設することにより、放熱パイプの熱を真空断熱材で確実に断熱し、冷蔵庫内への吸熱負荷を低減させ、また、真空断熱材は硬質ウレタンフォームより断熱性能が良いことから、冷蔵庫としての吸熱量が低減されることで、天面に放熱パイプを配設しないことが可能となり、真空断熱材を容易に天面に貼付けることができ、省エネルギーの効果を高めることができる。また、天面に放熱パイプがないことで放熱パイプの形状がシンプルになり、加工性向上、工数削減、材料費低減ができる。さらに、天面に放熱パイプがないことで他の冷蔵庫の放熱パイプと兼用することも可能である。
【０１２９】
また、本発明の請求項１４に記載の冷蔵庫の発明は、外箱に接する面に放熱パイプを組み込んだ真空断熱材を、前記外箱内側に配設することにより、外箱と真空断熱材との間に放熱パイプを挟む前に放熱パイプを外箱内側に固定する場合よりも、放熱パイプと真空断熱材間の空隙を小さくすることができ、外箱表面の凸凹や波打ちを抑えることができ外観の美しさを維持することができる。また、真空断熱材の断熱効果を高め、省エネルギー効果を高めることができる。また、あらかじめ、放熱パイプを真空断熱材に配置し組立てを行うことができるので製造が容易となる。
【０１３０】
また、本発明の請求項１５に記載の冷蔵庫の発明は、外箱と内箱との間に、硬質ウレタンフォームと、両面が金属箔を有するフィルムで構成された真空断熱材とを備えるものであり、両面のフィルムに高いガスバリヤ性のある金属箔を用いることにより、真空断熱材の両面が複雑な形状の面に接する場合であっても、信頼性が高い真空断熱材の利用が可能となる。また、両面が同一材料であるため、コスト低減ができる。さらに、両面が同一材であるため、外箱あるいは内箱に貼付ける時に真空断熱材の貼付面を間違える心配がなく作業が容易になる。
【０１３１】
また、本発明の請求項１６に記載の冷蔵庫の発明は、外箱と内箱との間に真空断熱材を、前記真空断熱材のフィルムの封止代が硬質ウレタンフォームが流れ込む方向に位置しない状態で配設することにより、硬質ウレタンフォームの流れを阻害することなく安定した流れを可能とする。また、外箱と内箱間に注入する際の硬質ウレタンフォームは高湿状態であり、それが直接フィルムの封止代部に接しないことで熱ストレスを受けず、真空断熱材の劣化を防止することができる。さらに、封止代数が少なくなり真空断熱材は高いガスバリヤ性を維持することができる。
【０１３２】
また、本発明の請求項１７に記載の冷蔵庫の発明は、外箱と内箱との間に配設される除霜水配管と前記内箱との間に、真空断熱材を配設することにより、真空断熱材により除霜水の保温を図り、除霜水が冷やされて凍結することを防止することができる。
【０１３３】
また、本発明の請求項１８に記載の冷蔵庫の発明は、外箱と内箱との間で、硬質ウレタンフォームの流れを阻害するおそれがある雑物がある所に真空断熱材を配設することにより、真空断熱材により冷蔵庫の吸熱負荷を効果的に抑えることができ、省エネルギーの効果を高めることができる。また、硬質ウレタンフォームの流れ性を阻害してしまうおそれがある雑物がある所に真空断熱材を配設することで断熱性能を確保することができる。
【０１３４】
また、本発明の請求項１９に記載の冷蔵庫の発明は、冷蔵庫の幅方向に平面が形成された内箱底面外側に、真空断熱材を接し配設することにより、内箱底面の真空断熱材の貼付け面積を拡大すると同時に底面の面積を小さくすることができ、省エネルギー効果を高めることができる。さらに、真空断熱材の貼付け性の向上を図ることができる。
【０１３５】
また、本発明の請求項２０に記載の冷蔵庫の製造方法の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備える冷蔵庫の製造方法において、真空断熱材を貼付け前に真空断熱材に接する面の異物を除去する工程を加えたことにより、異物による真空断熱材の破損をなくすことができ、貼付け工程の確実性が向上する。
【０１３６】
また、本発明の請求項２１に記載の冷蔵庫の製造方法の発明は、外箱と内箱との間に硬質ウレタンフォームと真空断熱材とを備え、外箱に前記真空断熱材を貼付ける冷蔵庫の製造方法において、端面を保護するように外箱端面に設けた保護部材を使って真空断熱材の位置決めを行うことにより、外箱端面の保護用部材と真空断熱材の位置決め用部材との共用を図ることができる。また、真空断熱材の破損をなくすことができる。さらに、真空断熱材貼付け時の位置決めが容易になり、作業性の向上が図れる。
【図面の簡単な説明】
【図１】本発明の実施の形態１における冷蔵庫の縦断面図
【図２】同実施の形態の冷蔵庫の縦断面図
【図３】同実施の形態の冷蔵庫に適用する真空断熱材の要部拡大縦断面図
【図４】同実施の形態の冷蔵庫の部分拡大断面図
【図５】同実施の形態の冷蔵庫の部分拡大断面図
【図６】本発明の実施の形態２における冷蔵庫の横断面図
【図７】同実施の形態の冷蔵庫の放熱パイプ近傍の部分拡大断面図
【図８】本発明の実施の形態３における冷蔵庫の外箱平板の折り曲げ前の斜視図
【図９】本発明の実施の形態４における冷蔵庫の要部拡大断面図
【図１０】本発明の実施の形態５における冷蔵庫の要部拡大断面図
【図１１】本発明の実施の形態６における冷蔵庫における外箱への真空断熱材の位置決め時の要部拡大断面図
【図１２】従来の冷蔵庫の縦断面図
【符号の説明】
２２　内箱
２２ａ　硬質ウレタンフォーム空気抜き用孔
２３　外箱
２４　硬質ウレタンフォーム
３０　機械室
４１，４２，４３，４４，４４ａ，４５，４６，４７，４８，４９，５０　真空断熱材
５３　蒸着層フィルム
５５　アルミ蒸着フィルム
５７　金属箔層フィルム
５９　アルミ箔
６１　放熱パイプ
６２　アルミテープ
７２　除霜水配管
７３　保護部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refrigerator provided with a vacuum heat insulating material and a method for manufacturing the refrigerator.
[0002]
[Prior art]
In recent years, as a means of improving the heat insulating performance of refrigerators, there is a method of using a vacuum insulating material having high heat insulating performance in order to save energy and space of the refrigerator. It is urgently necessary to improve the heat insulating performance by maximizing the use of a vacuum heat insulating material having a heat insulating performance several to ten times that of the foam within an appropriate range.
[0003]
As a conventional refrigerator provided with a vacuum heat insulating material, there is one disclosed in Japanese Patent Application Laid-Open No. 6-159922.
[0004]
Hereinafter, the conventional refrigerator will be described with reference to the drawings. FIG. 12 is a side sectional view of the conventional refrigerator.
[0005]
In the drawing, reference numeral 1 denotes a refrigerator body, which covers the entire space formed by an outer box 2 and an inner box 3 with a moldable bag-shaped paper material 4, and a filler made of inorganic porous material inside the paper material 4. 5, and a vacuum heat insulating material 6 is formed along the shape of the space surrounded by the inner and outer boxes 2 and 3. Further, the vacuum heat insulating material used has metal foils on both sides, and the shape is only flat.
[0006]
With this configuration, the work of storing the vacuum heat insulating material 6 between the inner and outer boxes 2 and 3 can be easily performed, the work of closing the gap between the inner and outer boxes 2 and 3 and the vacuum heat insulating material 6 can be eliminated, and the rigid urethane foam can be used. Since the heat insulating box can be constituted only by the vacuum heat insulating material 6 without using it, extremely high heat insulating performance can be secured.
[0007]
[Problems to be solved by the invention]
However, since the refrigerator described in the above-described conventional example uses only the vacuum heat insulating material 6 which is inferior in strength as compared with the hard urethane foam, the refrigerator has high heat insulation performance but is very weak in strength. There was a problem. Further, since the shape of the inner box and the outer box is not planar, it has been difficult to use a plate-shaped vacuum heat insulating material for a non-planar part. In order to improve the heat insulation performance of the vacuum heat insulating material, it is effective to use a vacuum heat insulating material using an aluminum vapor-deposited film on one plane. Use was difficult. Although the plate-shaped vacuum heat insulating material was stuck on a flat surface portion, direct sticking to an uneven surface such as a heat radiating pipe was an issue in order to improve the coverage.
[0008]
In view of the above-mentioned problems, the present invention has no problem in box strength even when a large amount of vacuum heat insulating material is used, makes it easy to use the vacuum heat insulating material, and can increase the coverage at a low cost. Therefore, a refrigerator having high insulation performance is provided at low cost.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a refrigerator according to claim 1 of the present invention is provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, and a machine room is provided at a lower portion. In the above, the vacuum heat insulating material is disposed in contact with the outer box with respect to the upper side surface, the top surface, the back surface, and the front surface of the refrigerator, and the inner side is formed with respect to the bottom surface, the lower side surface, and the surface constituting the machine room. It is arranged in contact with the box.
[0010]
ADVANTAGE OF THE INVENTION According to this invention, a vacuum heat insulating material is arrange | positioned from the place with a large passing heat gradient inside and outside a box, the heat absorption load is effectively suppressed in the state where the use value of a vacuum heat insulating material is high, and an energy saving effect is improved. Can be.
[0011]
Further, the vacuum heat insulating material is disposed on the upper side of the refrigerator, the top surface, the rear surface, and the front surface in contact with the outer box, and the bottom surface and the surface constituting the machine room are disposed in contact with the inner box. The vacuum insulation materials placed on the lower side surfaces, the bottom surface, and the machine room where the surface temperature of the vacuum rises are no longer exposed to high temperatures, and the deterioration of the vacuum insulation performance over time can be minimized. The long-term reliability of the insulation material is improved.
[0012]
In addition, since the vacuum heat insulating material is disposed in contact with the inner box on both lower sides, complicated fitting portions and pipes between the outer boxes can be avoided, and damage to the vacuum heat insulating material can be prevented. .
[0013]
Furthermore, since the vacuum heat insulating material is disposed in contact with either the outer box or the inner box constituting the box body, a sufficient space distance for the hard urethane foam can be secured, so that the hard urethane foam becomes rough or foamed. Not only does the insulation performance not decrease due to the shortage, but also the box strength can be maintained.
[0014]
Further, the invention of a refrigerator according to claim 2 of the present invention is the refrigerator according to claim 1, wherein the vacuum heat insulating material disposed in contact with the inner box is replaced by the inner box in which the vacuum heat insulating material is disposed in contact. The vacuum heat insulating material disposed in contact with the inner box does not protrude from each surface of the inner box in which the vacuum heat insulating material is disposed in contact with the inner box. When hard urethane foam is poured between the outer box and the inner box after disposing the material at the specified location, the force in the direction of peeling off the inner box against the vacuum insulation material arranged in the inner box As a result, the vacuum insulating material can be prevented from peeling off due to the inflow of the hard urethane foam, and the attachment of the vacuum insulating material can be easily stabilized, and at the same time, the flowability of the hard urethane foam is not hindered.
[0015]
According to a third aspect of the present invention, there is provided a refrigerator according to the first or second aspect, wherein an end face of the vacuum heat insulating material is exposed on a surface of the inner box on which the vacuum heat insulating material is provided in contact. In order to reduce the area, a convex portion surrounding the outer periphery of the vacuum heat insulating material or a concave portion for accommodating the vacuum heat insulating material is provided, and the convex portion or the concave portion facilitates positioning when applying the vacuum heat insulating material. In addition, it is possible to prevent the vacuum insulation material from being broken. Further, peeling of the vacuum heat insulating material due to inflow of the rigid urethane foam can be prevented. Further, regarding the convex portion, the step between the inner box and the vacuum heat insulating material is reduced, and the flowability of the rigid urethane foam is not hindered. The recess is easy to process the mold of the inner box. Further, the projections or depressions themselves reinforce the inner box, so that the vacuum heat insulating material can be easily attached.
[0016]
According to a fourth aspect of the present invention, there is provided a refrigerator according to any one of the first to third aspects, wherein a predetermined inclination for defrosting water treatment is provided on an upper surface below the cooler. A heat insulating member having a shape formed and a lower surface being flat and closely contacting the inner box is provided. With this heat insulating member, the surface of the inner box located below the cooler can be made flat, and an inclined portion is formed on the surface of the inner box. Since there is no vacuum insulation material, the vacuum insulation material can be attached efficiently, and peeling of the vacuum insulation material due to the inflow of hard urethane foam can be prevented. In addition, since the inclined portion has a flat surface, the side length is shortened, the vacuum heat insulating material can be reduced, and the heat absorption load into the refrigerator can be reduced by shortening the side length.
[0017]
According to a fifth aspect of the present invention, there is provided a refrigerator according to any one of the first to third aspects, wherein the refrigerator is located below the cooler in the inner box and is used for defrosting water treatment. Providing a heat insulating member for filling a gap formed between the portion of the inner box and the vacuum heat insulating material between a portion where the inclined shape is formed and the vacuum heat insulating material disposed in contact with the inner box. With this heat insulating member, the surface on which the vacuum heat insulating material is applied can be made flat, and the surface on which the vacuum heat insulating material is applied has no inclined portion, so that the vacuum heat insulating material can be efficiently applied, and the rigid urethane foam can be used. Of the vacuum heat insulating material due to the inflow of water can be prevented. In addition, since the inclined portion has a flat surface, the side length is shortened, the vacuum heat insulating material can be reduced, and the heat absorption load into the refrigerator can be reduced by shortening the side length. Furthermore, a vacuum heat insulating material is previously arranged on the heat insulating member, and the box body can be assembled, which facilitates manufacture.
[0018]
According to a sixth aspect of the present invention, there is provided a refrigerator according to any one of the first to fifth aspects, wherein a hole for venting air of a rigid urethane foam is provided on the inner surface of the inner box. By providing the air vent hole provided on the back of the outer case at the back of the inner case, a vacuum heat insulating material can be provided on the back of the outer case. Further, there is no air vent hole in the outer box, so that the appearance can be kept beautiful. Also, the back of the outer box of another refrigerator can be used also, and the number of parts and the number of steps can be reduced.
[0019]
According to a seventh aspect of the present invention, there is provided a refrigerator according to any one of the first to sixth aspects, wherein the position of the lower end of the vacuum heat insulating material disposed in contact with the outer box on both upper side surfaces. Is to be lower than the position of the upper end of the vacuum heat insulating material disposed in contact with the inner box on the lower side surfaces, and when disposing the vacuum heat insulating material, even if it is slightly shifted in the vertical direction, Even if the dimensional accuracy of the vacuum insulation material is reduced, the outer case is located at the boundary between the upper side surfaces where the vacuum insulation material is placed in contact with the outer case and the lower side surfaces where the vacuum insulation material is placed in contact with the inner case. Since the vacuum heat insulating material exists in at least one of the inner case and the inner box, it is possible to prevent the heat insulating effect of the vacuum heat insulating material from being reduced. Further, a stable flow can be achieved without obstructing the flow of the rigid urethane foam.
[0020]
Further, the invention of a refrigerator according to claim 8 of the present invention is directed to a refrigerator having a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein the vacuum heat insulating material has an aluminum surface. A vapor-deposited film, the other surface of which is formed of a film having a metal foil, a sealing surface which seals an outer peripheral portion of each of the aluminum-deposited film and the film having the metal foil is a flat surface on the aluminum-deposited film side in the vacuum heat insulating material. Are on the same plane.
[0021]
According to the present invention, in the vacuum heat insulating material, one surface requiring high heat insulating property is constituted by an aluminum vapor-deposited film, and the other surface requiring high gas barrier property is constituted by a film having a metal foil, and sealing of both films is performed. Since the surface is located on the same plane as the plane on the aluminum-deposited film side, fins on the sealing surface can be easily treated, and a vacuum insulating material having high reliability and excellent heat insulating performance can be used.
[0022]
According to a ninth aspect of the present invention, in the refrigerator according to the ninth aspect, the flat surface of the vacuum heat insulating material on the aluminum vapor deposition film side is disposed in contact with the inside of the outer box. Vacuum heat insulating material having high reliability and excellent heat insulating performance can be effectively disposed, and fin treatment on the sealing surface is not required.
[0023]
Moreover, the invention of the refrigerator according to claim 10 of the present invention, in the invention according to claim 8, wherein a plane on the aluminum vapor deposition film side of the vacuum heat insulating material is disposed in contact with the outer side of the inner box, Vacuum heat insulating material having high reliability and excellent heat insulating performance can be effectively disposed, and fin treatment on the sealing surface is not required.
[0024]
Moreover, the invention of the refrigerator according to claim 11 of the present invention is such that the heat radiating pipe is fixed to the inside of the outer box by a seal material provided to the outside of the refrigerator, and the heat radiating pipe is sandwiched between the outer box and the heat radiating pipe. And a vacuum heat insulating material disposed inside the outer box.
[0025]
ADVANTAGE OF THE INVENTION According to this invention, the heat of a heat radiating pipe can be reliably insulated by the vacuum heat insulating material, and the heat absorption load in a refrigerator can be reduced efficiently. Furthermore, since the sealing material is disposed outside the refrigerator, the air between the heat radiation pipe and the outer case can be freely moved to the outside of the refrigerator, and unevenness and waving of the outer case surface due to heat shrinkage of the air can be suppressed. It can maintain the beauty of the appearance. Further, the work of attaching the heat radiating pipe can be easily performed without worrying about the amount of air between the heat radiating pipe and the outer box.
[0026]
In the refrigerator according to the twelfth aspect of the present invention, in the invention according to the eleventh aspect, the sealing material is divided or perforated.
[0027]
According to the present invention, the air between the heat radiating pipe and the vacuum heat insulating material can also be freely moved out of the refrigerator, and the unevenness and waving of the outer box surface due to the heat shrinkage of the air can be suppressed, and the beauty of the appearance is maintained. can do. Further, the work of attaching the heat radiating pipe can be easily performed without worrying about the amount of air between the heat radiating pipe and the vacuum heat insulating material.
[0028]
In the refrigerator according to the thirteenth aspect of the present invention, in the invention according to the eleventh aspect, the heat radiating pipe is disposed inside the outer box, avoiding a portion serving as a top surface of the refrigerator. .
[0029]
According to the present invention, the heat of the heat radiating pipe is reliably insulated by the vacuum heat insulating material to reduce the heat absorption load into the refrigerator, and since the vacuum heat insulating material has better heat insulating performance than hard urethane foam, By reducing the amount of heat absorption, it becomes possible not to dispose a heat radiation pipe on the top surface, the vacuum heat insulating material can be easily attached to the top surface, and the effect of energy saving can be enhanced. Further, since there is no heat radiating pipe on the top surface, the shape of the heat radiating pipe is simplified, so that it is possible to improve workability, reduce man-hours, and reduce material costs. Further, since there is no heat radiation pipe on the top surface, it can be used also as a heat radiation pipe of another refrigerator.
[0030]
Further, the invention of a refrigerator according to claim 14 of the present invention is such that a vacuum heat insulating material having a heat radiating pipe incorporated in a surface in contact with the outer box is disposed inside the outer box, and the outer box and the vacuum heat insulating material are provided. The gap between the heat-radiating pipe and the vacuum insulation material can be made smaller than when the heat-radiating pipe is fixed to the inside of the outer box before the heat-radiating pipe is sandwiched between them, and unevenness and waving on the outer box surface can be suppressed. The beauty of appearance can be maintained. Further, the heat insulating effect of the vacuum heat insulating material can be enhanced, and the energy saving effect can be enhanced. Further, since the heat radiating pipe can be arranged on the vacuum heat insulating material in advance and assembled, the manufacturing becomes easy.
[0031]
Further, the invention of a refrigerator according to claim 15 of the present invention comprises a hard urethane foam and a vacuum heat insulating material both sides of which are formed of a film having a metal foil, between an outer box and an inner box. Yes, by using metal foil with high gas barrier properties for both sides of the film, it is possible to use highly reliable vacuum insulation even when both sides of the vacuum insulation are in contact with the surface of complicated shape . Further, since both surfaces are made of the same material, cost can be reduced. Furthermore, since both surfaces are made of the same material, the operation can be easily performed without worrying that the surface to which the vacuum heat insulating material is attached is mistaken when attaching to the outer box or the inner box.
[0032]
Further, in the refrigerator according to the sixteenth aspect of the present invention, the vacuum heat insulating material is not provided between the outer case and the inner case, and the sealing margin of the film of the vacuum heat insulating material is not positioned in the direction in which the rigid urethane foam flows. It is arranged in a state.
[0033]
ADVANTAGE OF THE INVENTION According to this invention, a stable flow is enabled, without obstructing the flow of a rigid urethane foam. In addition, the rigid urethane foam when injected between the outer box and the inner box is in a highly humid state, and because it does not come into direct contact with the sealing margin of the film, it does not receive thermal stress and prevents deterioration of the vacuum insulation material can do. Further, the sealing algebra is reduced, and the vacuum heat insulating material can maintain high gas barrier properties.
[0034]
Further, the invention of a refrigerator according to claim 17 of the present invention is such that a vacuum heat insulating material is provided between the inner box and the defrosting water pipe provided between the outer box and the inner box. In addition, the heat insulation of the defrost water can be achieved by the vacuum heat insulating material, and the defrost water can be prevented from being cooled and frozen.
[0035]
In the refrigerator according to the eighteenth aspect of the present invention, the vacuum heat insulating material is disposed between the outer box and the inner box in a place where there is a foreign matter that may hinder the flow of the rigid urethane foam. The heat absorbing load of the refrigerator can be effectively suppressed by the vacuum heat insulating material, and the effect of energy saving can be enhanced. In addition, heat insulation performance can be ensured by arranging a vacuum heat insulating material in a place where there is a foreign substance that may hinder the flowability of the rigid urethane foam.
[0036]
The refrigerator according to claim 19 of the present invention is arranged such that a vacuum heat insulating material is in contact with and disposed outside the bottom surface of the inner box having a flat surface formed in the width direction of the refrigerator. The area of the bottom surface can be reduced at the same time as the area for attaching the material can be increased, and the energy saving effect can be enhanced. Further, it is possible to improve the adhesiveness of the vacuum heat insulating material.
[0037]
Further, the invention of a method for manufacturing a refrigerator according to claim 20 of the present invention is a method for manufacturing a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein the vacuum heat insulating material is not attached. In addition, a step of removing foreign matter on the surface in contact with the vacuum heat insulating material is added, so that the vacuum heat insulating material can be prevented from being damaged by the foreign matter, and the reliability of the attaching step is improved.
[0038]
The refrigerator manufacturing method according to claim 21 of the present invention comprises a rigid urethane foam and a vacuum heat insulator between an outer box and an inner box, and the vacuum box is attached to the outer box. In the manufacturing method, the vacuum heat insulating material is positioned using a protection member provided on the end face of the outer box so as to protect the end face.
[0039]
ADVANTAGE OF THE INVENTION According to this invention, the protection member of an outer box end surface and the positioning member of a vacuum heat insulating material can be shared. In addition, breakage of the vacuum heat insulating material can be eliminated. Further, positioning at the time of attaching the vacuum heat insulating material becomes easy, and workability can be improved.
[0040]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0041]
(Embodiment 1)
FIG. 1 is a vertical cross-sectional view showing the left side of the refrigerator according to Embodiment 1 of the present invention when viewed from the right and left, and FIG. FIG. 2 is a longitudinal sectional view showing the appearance as viewed from above.
[0042]
1 and 2, reference numeral 21 denotes a refrigerator body, and a rigid urethane foam 24 is filled in a space formed by an inner box 22 made of a synthetic resin such as ABS and an outer box 23 made of a metal such as an iron plate. . Reference numeral 30 denotes a machine room arranged below the rear part of the refrigerator main body 21, and a compressor 31 is arranged inside. 32 is a refrigerator for cooling, 33 is a fan for cooling, 34 is a refrigerator for freezing, 35 is a fan for freezing, and 36 is a condenser arranged on the bottom of the refrigerator body 21.
[0043]
A refrigerator compartment door 37, a vegetable compartment door 38, and freezer compartment doors 39 and 40 are provided at the front opening of the refrigerator body 21. Reference numerals 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, and 50 denote vacuum heat insulating materials, which together with the rigid urethane foam 24 constitute a heat insulating box 21a.
[0044]
Here, the vacuum heat insulating materials 41, 42, and 44 are attached in contact with the top surface, the back surface, and the inside of the upper side surface of the outer box 23, respectively. Further, the vacuum heat insulating materials 43, 44a, 45 are attached in contact with the bottom surface, the lower side surface, and the machine room constituting surface of the inner box 22, respectively.
[0045]
Inside the refrigerator compartment door 37, the vegetable compartment door 38, and the freezer compartment doors 39 and 40, which are arranged at the front opening of the refrigerator body 21, vacuum insulation materials 47, 48, 49 and 50 are provided respectively. It is arranged so as to be in contact with the outer iron plate.
[0046]
In the refrigerator of the present embodiment, the rigid urethane foam 24 and the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, 50 are provided between the outer box 23 and the inner box 22. In the refrigerator provided with the machine room 30 at the lower part, the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, 50 are provided on both sides, the top and the back of the refrigerator. , The front surface is disposed in contact with the outer box 23, and the bottom surface, the lower side surfaces, and the surfaces constituting the machine room 30 are disposed in contact with the inner box 22.
[0047]
According to the present embodiment, the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, and 50 are disposed from a location having a large heat gradient inside and outside the heat insulating box. In a state where the use value of the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, 50 is high, the heat absorption load can be effectively suppressed, and the energy saving effect can be enhanced.
[0048]
Further, the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, and 50 are arranged such that the upper side surfaces, the top surface, the back surface, and the front surface of the refrigerator are in contact with the outer box 23. Further, since the surface constituting the machine room 30 is disposed in contact with the inner box 22, the vacuum heat insulating materials 43, 44a, 45, 45, and 45 disposed on the lower side surfaces, the bottom surface and the machine room where the surface temperature of the outer box 23 becomes high. 46 is no longer exposed to high temperatures, the deterioration of the vacuum insulation performance over time can be minimized, and the long-term reliability of the vacuum insulation materials 43, 44a, 45, 46 increases.
[0049]
Further, since the vacuum heat insulating material 44a on both lower side surfaces is disposed in contact with the inner box 22, a complicated fitting portion and piping between the outer boxes 23 can be avoided, and the vacuum heat insulating material 44a is prevented from being damaged. can do.
[0050]
Further, the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, 50 are arranged in contact with either the outer box 23 or the inner box 22 constituting the heat insulating box of the refrigerator. The rigid urethane foam 24 has a sufficient space distance to be formed, so that not only does the rigid urethane foam 24 not deteriorate the heat insulation performance due to roughening or insufficient foaming, but also maintain the strength of the box body. Can be.
[0051]
The heat insulation wall thickness of the heat insulating box 21a formed by the rigid urethane foam 24 surrounding the freezing compartments 28 and 29 in the freezing area and the vacuum heat insulating materials 42, 43, 44a and 45, except for the door, is the wall thickness of the opening. Insulation wall thickness of the heat insulation box 21a formed of the hard urethane foam 24 and the vacuum heat insulation materials 41, 42, 44 surrounding the refrigerator compartment 26 and the vegetable compartment 27 in the refrigerator region in a distribution of 25 to 50 mm including the thin portion of Has a distribution of 25 to 40 mm excluding the door, including the portion where the wall thickness of the opening is thin.
[0052]
The vacuum heat insulating materials 43, 44a, 45, and 46 provided in contact with the inner box 22 are smaller in projected area than the inner box 22. In other words, the vacuum heat insulating materials 43, 44a, 45, and 46 disposed in contact with the inner box 22 do not protrude from the respective surfaces of the inner box 22 in which the vacuum heat insulating materials 43, 44a, 45, and 46 are disposed. .
[0053]
In the refrigerator of the present embodiment, the vacuum heat insulating materials 43, 44a, 45, and 46 disposed in contact with the inner box 22 are provided on the respective surfaces of the inner box 22 in contact with the vacuum heat insulating materials 43, 44a, 45, and 46. When the rigid urethane foam 24 is poured between the outer box 23 and the inner box 22 after the vacuum heat insulating materials 43, 44a, 45, and 46 are disposed at predetermined positions, the inner box 22 does not protrude. No force is applied to the vacuum heat insulating materials 43, 44a, 45, and 46 disposed in the inner box 22 in the direction in which the vacuum heat insulating materials 43, 44a, 45, and 46 are peeled off. Peeling can be prevented, and the attachment of the vacuum heat insulating materials 43, 44a, 45, 46 can be easily stabilized, and the flowability of the rigid urethane foam 24 is not hindered.
[0054]
Also, the vacuum heat insulating materials 43, 44a, and 45 are provided on the surface of the inner box 22 on which the vacuum heat insulating materials 43, 44a, and 45 are arranged so as to reduce the exposed area of the end surfaces of the vacuum heat insulating materials 43, 44a, and 45. Is provided, or a concave portion for accommodating the vacuum heat insulating materials 43, 44a, 45 is provided.
[0055]
In the present embodiment, the above-mentioned convex portions or concave portions facilitate positioning when attaching the vacuum heat insulating materials 43, 44a, 45, and can prevent the vacuum heat insulating materials 43, 44a, 45 from breaking. Further, peeling of the vacuum heat insulating materials 43, 44a, 45 due to the inflow of the rigid urethane foam 24 can be prevented. In the case of the convex portion, the step between the inner box 22 and the vacuum heat insulating materials 43, 44a, 45 is reduced, and the flowability of the rigid urethane foam 24 is not hindered. In the case of the concave portion, the processing of the mold of the inner box 22 is easy. Further, the projections or depressions themselves reinforce the inner box 22, and the vacuum heat insulating materials 43, 44a, 45 are easily attached.
[0056]
When the vacuum heat insulating material 45 is disposed below the cooling unit 34, a heat insulating member is disposed below the cooler 35 or the inner box 22 to secure a planar shape.
[0057]
Here, the heat insulating member disposed below the cooler 34 is provided below the cooler 34 and has a predetermined inclined shape for defrosting water treatment formed on the upper surface, and the lower surface is flat and closely adheres to the inner box 22. Heat insulating member.
[0058]
With this heat insulating member, the surface of the inner box 22 located below the cooler 34 can be made flat, and since the surface of the inner box 22 has no inclined portion, the vacuum heat insulating material 45 can be efficiently attached, and the rigid urethane foam 24 Of the vacuum heat insulating material 45 due to the inflow of water. In addition, when the inclined portion is flat, the side length is shortened, the vacuum heat insulating material 45 can be reduced, and the heat absorption load into the refrigerator can be reduced by shortening the side length.
[0059]
Further, a heat insulating member disposed in the inner box 22 below the cooling unit 34 includes a portion located below the cooler 34 in the inner box 22 and having a predetermined inclined shape for defrost water treatment; A heat insulating member that fills a gap formed between a portion of the inner box 22 where a predetermined inclined shape is formed and the vacuum heat insulating material 45 between the vacuum heat insulating material 45 and the vacuum heat insulating material 45 disposed in contact with the heat insulating member 22.
[0060]
With this heat insulating member, the surface on which the vacuum heat insulating material 45 is applied can be made flat, and the vacuum heat insulating material 45 can be efficiently applied because there is no inclined portion on the surface on which the vacuum heat insulating material 45 is applied. The peeling of the vacuum heat insulating material 45 due to the inflow of 24 can be prevented. In addition, when the inclined portion is flat, the side length is shortened, the vacuum heat insulating material 45 can be reduced, and the heat absorption load into the refrigerator can be reduced by shortening the side length. Further, the vacuum heat insulating material 45 is arranged on the heat insulating member in advance, and the box body can be assembled, so that the manufacture is easy.
[0061]
Further, a hole 22a for venting the air of the rigid urethane foam 24 is provided on the inner surface of the inner box 22. The vacuum heat insulating material 42 can be disposed on the rear surface of the outer case 23 by providing the air vent hole provided on the rear surface of the outer case 23 on the inner surface of the inner case 22. Further, there is no air vent hole in the outer box 23, so that the appearance can be kept beautiful. Also, the back of the outer box of another refrigerator can be used also, and the number of parts and the number of steps can be reduced.
[0062]
Further, at the boundary between the vacuum heat insulating material 44 and the vacuum heat insulating material 44a, the vacuum heat insulating material 44 and the vacuum heat insulating material 44a overlap.
[0063]
In the present embodiment, the position of the lower end of the vacuum heat insulating material 44 provided in contact with the outer box 23 on both upper sides of the refrigerator body 21 is the upper end of the vacuum heat insulating material 44a provided in contact with the inner box 22 on both lower sides. When the vacuum heat insulators 44, 44a are disposed on both side surfaces of the refrigerator body 21, even if the vacuum heat insulators 44, 44a are slightly displaced in the vertical direction, the dimensional accuracy of the vacuum heat insulators 44, 44a can be reduced. When the outer box 23 is located at the boundary between the upper side surfaces where the vacuum heat insulating material 44 is disposed in contact with the outer box 23 and the lower side surfaces where the vacuum heat insulating material 44a is disposed in contact with the inner box 22. Since the vacuum heat insulating material 44 (44a) is present in at least one of the inner boxes 22, it is possible to prevent a reduction in the heat insulating effect of the vacuum heat insulating materials 44, 44a. Furthermore, a stable flow is enabled without obstructing the flow of the rigid urethane foam 24.
[0064]
The inner box 22 is flat in the width direction so that the vacuum heat insulating materials 43 and 45 can be easily and effectively attached.
[0065]
In the present embodiment, the vacuum heat insulating materials 43 and 45 are provided in contact with and disposed outside the bottom surface of the inner box 22 having a flat surface formed in the width direction of the refrigerator. The area of the bottom surface can be reduced at the same time as the bonding area is increased, and the energy saving effect can be enhanced. Further, it is possible to improve the adhesiveness of the vacuum heat insulating materials 43 and 45.
[0066]
When the vacuum heat insulating materials 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, and 50 are provided, foreign matter is removed from the surface to be attached before attaching.
[0067]
In the present embodiment, the vacuum heat insulators 41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, 50 are attached before the vacuum heat insulators 41, 42, 43, 44, 44a, 45, 46 before being attached. , 47, 48, 49, 50 by adding a step of removing foreign matter on the surface, the vacuum heat insulating materials 41, 42, 43, 44, 44 a, 45, 46, 47, 48, 49, 50 are damaged by the foreign matter. Can be eliminated, and the reliability of the attaching process can be improved.
[0068]
FIG. 3 is an enlarged vertical sectional view of a main part of a vacuum heat insulating material applied to the refrigerator of the present embodiment, and FIGS. 4 and 5 are partial cross-sectional enlarged views of the refrigerator of the same embodiment.
[0069]
In the figure, reference numerals 44 and 44a denote vacuum heat insulating materials having a core material 52 therein. After heating and drying an inorganic fiber aggregate such as glass wool, the core material 52 is inserted into a jacket material in which a vapor deposition layer film 53 and a metal foil layer film 57 are bonded, and the inside is evacuated to seal the opening. It is formed by this.
[0070]
The vapor-deposited layer film 53 is a composite plastic film in which an aluminum-deposited film 55 is sandwiched between a nylon film 54 and a high-density polyethylene film 60. It is a composite plastic film sandwiched between.
[0071]
In addition, the sealing surface between the vapor deposition layer film 53 and the metal foil layer film 57 has the vapor deposition layer film 53 side as one plane, and the surface on the metal foil layer film 57 side is three-dimensionally configured. And the vapor deposition layer film 53 side is arranged in contact with the outer box 23 or the inner box 22.
[0072]
The vacuum heat insulating materials 44 and 44a of the present embodiment are constituted by a vapor deposition layer film 53 having an aluminum vapor deposition film 55 on one surface and a metal foil layer film 57 having a metal foil (aluminum foil) 59 on the other surface. The sealing surfaces that seal the respective outer peripheral portions of the vapor deposition layer film 53 and the metal foil layer film 57 are on the same plane as the plane of the vapor deposition layer film 53 in the vacuum heat insulating materials 44 and 44a, and the vacuum heat insulating materials 44 and 44a In the above, one plane requiring high heat insulation is a vapor deposition layer film 53 having an aluminum vapor deposition film 55, and the other plane requiring high gas barrier properties is a metal foil layer film 57 having a metal foil (aluminum foil) 59. Since the sealing surfaces of both films 53 and 57 are located on the same plane as the plane on the vapor deposition layer film 53 side, fins on the sealing surfaces can be easily processed. Together, it is possible to use a good vacuum heat insulating material 44,44a of high heat insulating performance reliability.
[0073]
Further, in the present embodiment, as shown in FIG. 4, the flat surface of the vacuum heat insulating material 44 on the side of the vapor deposition layer film 53 is disposed in contact with the inside of the outer box 23. The excellent vacuum heat insulating material 44 can be effectively disposed, and the fins on the sealing surface need not be treated.
[0074]
Further, in the present embodiment, as shown in FIG. 5, the plane on the side of the vapor deposition layer film 53 of the vacuum heat insulating material 44a is disposed so as to be in contact with the outside of the inner box 22. The excellent vacuum heat insulating material 44a can be effectively disposed, and the fins on the sealing surface need not be treated.
[0075]
In addition, both sides of the inner box 22 and the outer box 23 are complicated in shape and a vacuum heat insulating material cannot be attached thereto, or a vacuum heat insulating material having a metal foil film on both sides in a portion where the reliability of the vacuum heat insulating material is important. Use
[0076]
By using metal foil (metal foil film) with high gas barrier properties for the two-sided film constituting the vacuum heat insulating material, high reliability is obtained even when both surfaces of the vacuum heat insulating material are in contact with the surface of a complicated shape. It becomes possible to use vacuum insulation. Further, since both surfaces are made of the same material, cost can be reduced. Further, since both surfaces are made of the same material, the work can be easily performed without fear of mistakenly attaching the vacuum heat insulating material to the outer box 23 or the inner box 22 when attaching.
[0077]
Here, when the fiber diameter of the inorganic fiber aggregate 52 is in the range of 0.1 μm to 1.0 μm and the thermal conductivity of the rigid urethane foam 24 is 0.015 W / mK, the same measurement standard is used. The vacuum heat insulators 44 and 44a are applied as heat insulators having a thermal conductivity of 0.0015 W / mK. That is, the vacuum heat insulating materials 44 and 44a having heat insulation performance 10 times higher than the rigid urethane foam 24 are applied.
[0078]
In the above configuration, the cooling room 26 and the vegetable room 27 are almost 0 by the cooling device including the compressor 31, the refrigerator cooler 32, the refrigerator blower 33, the freezing cooler 34, the freezing blower 35, and the condenser 36. The freezing compartments 28 and 29 are cooled to a temperature of approximately -15 to -25 ° C.
[0079]
Then, the vacuum heat insulating material 44 is disposed in contact with the upper side surfaces, the vacuum heat insulating material 41 is in contact with the top surface, the vacuum heat insulating material 42 is in contact with the back surface, and the vacuum heat insulating materials 47, 48, 49, 50 are in contact with the outer box of the door body which is the front surface. Since the vacuum heat insulating material 43, the vacuum heat insulating material 44a, and the vacuum heat insulating material 45 are disposed on the bottom surface, the lower side surfaces, and the surfaces constituting the machine chamber 30 in contact with the inner box 22, the surface temperature of the outer box 23 is high. The vacuum heat insulating materials 43 and 45 disposed in the bottom surface and the machine room 30 are not exposed to high temperatures, the deterioration of the vacuum heat insulating performance over time can be minimized, and the long-term reliability of the vacuum heat insulating material can be reduced. Improve the nature. In addition, reliability can be improved by arranging the vacuum heat insulating material 44a in contact with the inner box on both lower side surfaces where the shape of the outer box becomes complicated.
[0080]
Further, since the vacuum heat insulating material is disposed in contact with either the outer box 22 or the inner box 23 constituting the heat insulating box 21a, the space distance formed by the rigid urethane foam 24 can be sufficiently ensured, and the rigid urethane foam can be secured. In addition to preventing the heat insulation performance from deteriorating due to the roughness of 24 and insufficient foaming, the strength of the box can be maintained.
[0081]
Further, since the vacuum heat insulating material 41 on the top surface is disposed in contact with the outer box 23, it is possible to attach a lighting member or an electric wire (not shown) for interior lighting to the top surface of the inner box 22, and the refrigerator compartment Lighting can be provided on the top surface of 26, and the usability can be improved.
[0082]
The heat insulation wall thickness of the heat insulating box 21a formed by the rigid urethane foam 24 surrounding the freezing compartments 28 and 29 in the freezing area and the vacuum heat insulating materials 42, 43, 44a and 45, except for the door, is the wall thickness of the opening. Insulation wall thickness of the heat insulation box 21a formed of the hard urethane foam 24 and the vacuum heat insulation materials 41, 42, 44 surrounding the refrigerator compartment 26 and the vegetable compartment 27 in the refrigerator region in a distribution of 25 to 50 mm including the thin portion of Has a distribution of 25 to 40 mm including a thin portion of the opening except for the door, and a vacuum insulating material having a thickness of 10 to 15 mm is provided in the heat insulating wall. The thickness to be filled is at least 10 mm. Therefore, the rigid urethane foam 24 does not hinder the fluidity during foaming, and does not cause a decrease in heat insulation due to foam roughness or poor filling.
[0083]
As described above, the heat insulation performance of the rigid urethane foam 24 can be maintained while the heat insulation performance of the rigid urethane foam 24 is sufficiently maintained while the thickness of the vacuum heat insulating material is ensured, and the heat insulation performance of the multilayer heat insulation wall can be effectively improved. In particular, it is more effective in the freezing temperature region where the temperature gradient inside and outside the refrigerator is large.
[0084]
By setting the thickness of the heat insulating wall of the freezing compartments 28 and 29 not to exceed 50 mm, the application of the vacuum heat insulating material does not affect the internal volume of the freezing compartments 28 and 29 having a relatively small volume ratio on the external layout. It can also be used to increase the value, and the use value of the vacuum insulation material can be further increased.
[0085]
In addition, by making the heat insulation wall thickness of the refrigerator compartment 26 and the vegetable compartment 27 not to exceed 40 mm, in a refrigerator temperature region where the temperature gradient inside and outside the refrigerator is relatively small, energy saving by applying the vacuum heat insulating material and the heat insulation box are performed. The effect of improving the internal volume efficiency inside and outside the 21a can be balanced.
[0086]
Further, after the vacuum heat insulating material 42 is disposed on the rear panel in advance, it is joined to the side surface and the top surface formed by bending a flat plate into a U-shape to form the outer box 23, and the vicinity of the joint of the outer box 23 formation. , So that the end face of the vacuum heat insulating material 42 can be arranged to be substantially the same size as the rear panel, and the heat insulating performance is enhanced, and the vacuum heat insulating material is previously placed in the outer box 23 or the inner box 22. Since the box body can be assembled by disposing the vacuum heat insulating material, the manufacture becomes easy.
[0087]
In addition, the vacuum heat insulating material 41 is one in which one surface is a vapor deposition layer film 53 and the other surface is a metal foil layer film 57, and the sealing surface of the film is the same as one surface of the vacuum heat insulating material 41 main body. The treatment of the fins becomes easy, and the use of a vacuum insulating material having high reliability and excellent heat insulating performance becomes possible.
[0088]
Further, the aluminum heat-insulating film (having good heat-insulating performance) of the vacuum heat-insulating material 41, which has lower heat conductivity than the metal foil, is disposed in contact with the inside of the outer case. The heat transfer from the outside of the refrigerator is suppressed, the heat absorption from the outside of the refrigerator is reduced, the vacuum insulating material having high reliability and excellent heat insulating performance can be effectively arranged in the heat insulating wall, and the fin of the sealing surface is not required.
[0089]
In addition, by disposing the vacuum heat insulating material 42 on the back surface of the heat insulating box 21a, the vacuum heat insulating material 42 drains the defrost water of the cooling device piping and the refrigeration cooler 32 and the refrigeration cooler 34. (Not shown) can be solved, and the rear panel and the vacuum heat insulating material 42 can be assembled as an integrated product, which is advantageous in the manufacturing process.
[0090]
(Embodiment 2)
FIG. 6 is a cross-sectional view of a refrigerator according to Embodiment 2 of the present invention, and FIG. 7 is a partially enlarged view near a heat radiation pipe of the refrigerator of the embodiment. The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different points will be described.
[0091]
In the figure, reference numeral 61 denotes a heat radiating pipe as a condenser which forms a part of a refrigeration cycle, which is disposed in contact with the side surface or the back surface of the outer box 23, and is fixed to the outer box 23 with an aluminum tape 62 having better heat conduction from the upper surface thereof. Have been. The vacuum heat insulating material 44 is provided so as to cover the heat radiating pipe 61. Further, the aluminum tape 62 is disposed outside the refrigerator, and a division or a hole is provided in the middle.
[0092]
In the present embodiment, the heat radiation pipe 61 is fixed to the inside of the outer box 23 by a sealing material (aluminum tape) 62 disposed outside the refrigerator, and the vacuum heat insulation is performed so that the heat radiation pipe 61 is sandwiched between the outer box 23 and the heat radiation pipe 61. Since the material 44 is disposed inside the outer box 23, the heat of the heat radiating pipe 61 is reliably insulated by the vacuum heat insulating material 44, and the heat absorption load into the refrigerator can be efficiently reduced. Further, since the sealing material (aluminum tape) 62 is disposed outside the refrigerator, air between the heat radiation pipe 61 and the outer case 23 can be freely moved outside the refrigerator, and the surface of the outer case 23 due to the heat shrinkage of the air. Unevenness and undulation can be suppressed, and the beauty of the appearance can be maintained. Further, the work of attaching the heat radiating pipe 61 can be easily performed without worrying about the amount of air between the heat radiating pipe 61 and the outer box 23.
[0093]
Further, since the sealing material (aluminum tape) 62 of the present embodiment is divided or perforated in the middle of being disposed outside the refrigerator, the air between the heat radiation pipe 61 and the vacuum heat insulating material 44 is also free. The outer surface of the outer box 23 can be prevented from being uneven or wavy due to the thermal contraction of the air, and the appearance can be maintained beautifully. Furthermore, the work of attaching the heat radiating pipe 61 can be easily performed without worrying about the amount of air between the heat radiating pipe 61 and the vacuum heat insulating material 44.
[0094]
When the heat radiating pipe 61 is installed, the heat radiating pipe 61 may be installed in the vacuum heat insulating material 44 in advance and installed in the outer box 23.
[0095]
In this case, the vacuum heat insulating material 44 in which the heat radiating pipe 61 is incorporated on the surface in contact with the outer case 23 is disposed inside the outer case 23, so before the heat radiating pipe 61 is sandwiched between the outer case 23 and the vacuum heat insulating material 44. The gap between the heat radiating pipe 61 and the vacuum heat insulating material 44 can be made smaller than in the case where the heat radiating pipe 61 is fixed to the inside of the outer box 23 (see FIG. 7). Can maintain the beauty of the appearance. Further, the heat insulating effect of the vacuum heat insulating material 44 can be enhanced, and the energy saving effect can be enhanced. In addition, since the heat radiation pipe 61 can be disposed in advance on the vacuum heat insulating material 44 and assembled, the manufacturing becomes easy.
[0096]
In the above configuration, since the heat radiating pipe 61 is attached between the outer box 23 and the vacuum heat insulating material 44, the heat of the heat radiating pipe 61 is reliably insulated by the vacuum heat insulating material 44, and the heat absorption load into the refrigerator is provided. Can be efficiently reduced.
[0097]
(Embodiment 3)
FIG. 8 is a perspective view of an outer flat plate of a refrigerator according to Embodiment 3 of the present invention before bending. The same components as those in the first to third embodiments are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.
[0098]
In the drawing, reference numeral 61 denotes a radiating pipe as a condenser which forms a part of a refrigeration cycle, which is disposed in contact with a surface 67 serving as a side surface of the outer box 23, and a radiating pipe 61 is disposed on a surface 66 serving as a top surface. It does not. In other words, the heat radiating pipe 61 is provided inside the outer box 23 so as to avoid the location that becomes the top surface of the refrigerator.
[0099]
In the present embodiment, with the above configuration, the heat of the heat radiating pipe 61 is reliably insulated by the vacuum heat insulating material 44 to reduce the heat absorption load into the refrigerator, and the heat insulating performance of the vacuum heat insulating material 44 is higher than that of the rigid urethane foam 24. Since the heat absorption amount of the refrigerator is reduced, the heat radiation pipe 61 can be omitted from the top surface, and the vacuum heat insulating material 41 can be easily stuck to the top surface, thereby saving energy. The effect can be enhanced.
[0100]
Further, since the heat radiation pipe 61 is not provided on the top surface, the shape of the heat radiation pipe 61 is simplified, so that workability can be improved, man-hours can be reduced, and material costs can be reduced. Further, since there is no heat radiation pipe 61 on the top surface, it can be used also as a heat radiation pipe 61 of another refrigerator.
[0101]
(Embodiment 4)
FIG. 9 is an enlarged view of a main part of a refrigerator according to Embodiment 4 of the present invention. The same components as those in the first to third embodiments are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.
[0102]
In the figure, reference numeral 44 denotes a vacuum heat insulating material, which is disposed in contact with the outer box 23, and does not have a film sealing allowance of the vacuum heat insulating material 44 in the direction in which the rigid urethane foam 24 flows. In other words, the vacuum heat insulating material 44 is disposed between the outer box 23 and the inner box 22 in a state where the sealing allowance of the film of the vacuum heat insulating material 44 is not located in the direction in which the rigid urethane foam 24 flows. .
[0103]
With the above configuration, the vacuum heat insulating material 44 enables a stable flow without obstructing the flow of the rigid urethane foam 24.
[0104]
Furthermore, the rigid urethane foam 24 when injected between the outer box 23 and the inner box 22 is in a high humidity state, and does not directly come into contact with the sealing margin of the film, so that it is not subjected to thermal stress and the vacuum heat insulating material 44 Degradation can be prevented.
[0105]
Furthermore, the sealing algebra is reduced, and the vacuum heat insulating material 44 can maintain high gas barrier properties.
[0106]
(Embodiment 5)
FIG. 10 is a cross-sectional view of a main part of a refrigerator according to Embodiment 5 of the present invention. The same components as those in the first to fourth embodiments are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.
[0107]
In the figure, reference numeral 72 denotes a defrost water pipe, and the vacuum heat insulating material 44a is preferentially arranged from the place where the defrost water pipe 72 and wiring or the like (not shown) are present.
[0108]
In the present embodiment, the vacuum heat insulating material 44a is provided between the outer box 23 and the inner box 22 where there is a foreign matter (defrost water pipe 72, wiring, etc.) that may obstruct the flow of the rigid urethane foam 24. The heat absorption load of the refrigerator can be effectively suppressed by the vacuum heat insulating material 44a, and the effect of energy saving can be enhanced. In addition, the heat insulating performance can be ensured by disposing the vacuum heat insulating material 44a in a place where there is a foreign substance that may impair the flowability of the rigid urethane foam 24.
[0109]
When the defrost water pipe 72 is installed, it is installed between the vacuum heat insulating material 44 and the outer box 23.
[0110]
In the present embodiment, a vacuum heat insulating material 44a is provided between a defrosting water pipe 72 provided between the outer box 23 and the inner box 22 and the inner box 22. By keeping the temperature of the defrost water 44a, it is possible to prevent the defrost water from being cooled and frozen under the influence of the temperature in the freezer compartments 28 and 29.
[0111]
(Embodiment 6)
FIG. 11 is a cross-sectional view of a main part of a refrigerator according to Embodiment 6 of the present invention. The same components as those in the first to fifth embodiments are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.
[0112]
In the figure, reference numeral 73 denotes a protective member for protecting the end face of the outer box 23, and the protective member 73 is also used as a positioning member for attaching the vacuum heat insulating material 44.
[0113]
In the present embodiment, a rigid urethane foam 24 and a vacuum heat insulating material are provided between the outer box 23 and the inner box 22, and the end face is protected in a refrigerator manufacturing method in which the vacuum heat insulating material is attached to the outer box 23. Since the vacuum heat insulating material 44 is positioned using the protection member 73 provided on the end face of the outer box 23, the protection member 73 on the end face of the outer box 23 and the positioning member of the vacuum heat insulator 44 can be shared. . In addition, damage to the vacuum heat insulating material 44 can be eliminated. Furthermore, positioning at the time of attaching the vacuum heat insulating material 44 becomes easy, and workability can be improved.
[0114]
【The invention's effect】
As described above, the refrigerator according to claim 1 of the present invention includes a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, and a refrigerator provided with a machine room at a lower portion. The vacuum heat insulating material is disposed in contact with the outer box for the upper side surfaces, the top surface, the back surface, and the front surface of the refrigerator, and is provided in the inner box for the bottom surface, the lower side surfaces, and the surfaces constituting the machine room. With the contact arrangement, the heat absorption load can be effectively suppressed in a state where the use value of the vacuum heat insulating material is high, and the energy saving effect can be enhanced.
[0115]
Furthermore, the vacuum insulation materials placed on the lower side surfaces, the bottom surface, and the machine room where the surface temperature of the outer box becomes higher will not be exposed to high temperatures, and the deterioration of the vacuum insulation performance over time will be minimized. The long-term reliability of the vacuum insulation material. In addition, since the vacuum heat insulating material is disposed so that both lower side surfaces are in contact with the inner box, complicated fitting portions and pipes between the outer boxes can be avoided, and breakage of the vacuum heat insulating material can be prevented.
[0116]
Furthermore, since the vacuum heat insulating material is disposed in contact with either the outer box or the inner box constituting the box body, a sufficient space distance for the hard urethane foam can be secured, so that the hard urethane foam becomes rough or foamed. Not only does the insulation performance not decrease due to the shortage, but also the box strength can be maintained.
[0117]
Further, the invention of a refrigerator according to claim 2 of the present invention is the refrigerator according to claim 1, wherein the vacuum heat insulating material disposed in contact with the inner box is replaced by the inner box in which the vacuum heat insulating material is disposed in contact. By arranging so as not to protrude from the respective surfaces, it is possible to prevent peeling of the vacuum heat insulating material due to inflow of the hard urethane foam, and furthermore, it is possible to easily stabilize the attachment of the vacuum heat insulating material, Does not interfere with foam flow.
[0118]
According to a third aspect of the present invention, there is provided a refrigerator according to the first or second aspect, wherein an end surface of the vacuum heat insulating material is exposed on a surface of the inner box on which the vacuum heat insulating material is in contact. By providing a convex portion surrounding the outer periphery of the vacuum heat insulating material or a concave portion for accommodating the vacuum heat insulating material so as to reduce the area, the positioning becomes easy when applying the vacuum heat insulating material, and the vacuum heat insulating material is prevented from being broken. can do. Further, peeling of the vacuum heat insulating material due to inflow of the rigid urethane foam can be prevented. Further, regarding the convex portion, the step between the inner box and the vacuum heat insulating material is reduced, and the flowability of the rigid urethane foam is not hindered. The recess is easy to process the mold of the inner box. Further, the projections or depressions themselves reinforce the inner box, so that the vacuum heat insulating material can be easily attached.
[0119]
According to a fourth aspect of the present invention, there is provided a refrigerator according to any one of the first to third aspects, wherein a predetermined inclination for defrosting water treatment is provided on an upper surface below the cooler. By providing a heat insulating member that is shaped and has a flat lower surface and closely adheres to the inner box, the surface of the inner box located below the cooler can be made flat, and since there is no inclined portion on the surface of the inner box, it is efficient. A vacuum heat insulating material can be stuck, and peeling of the vacuum heat insulating material due to inflow of hard urethane foam can be prevented. In addition, since the inclined portion has a flat surface, the side length is shortened, the vacuum heat insulating material can be reduced, and the heat absorption load into the refrigerator can be reduced by shortening the side length.
[0120]
According to a fifth aspect of the present invention, there is provided a refrigerator according to any one of the first to third aspects, wherein the refrigerator is located below the cooler in the inner box and is used for defrosting water treatment. Providing a heat insulating member for filling a gap formed between the portion of the inner box and the vacuum heat insulating material between a portion where the inclined shape is formed and the vacuum heat insulating material disposed in contact with the inner box. As a result, the surface on which the vacuum heat insulating material is applied can be made flat, and since the surface on which the vacuum heat insulating material is applied has no inclined portion, the vacuum heat insulating material can be efficiently applied, and the vacuum heat insulating material due to the inflow of hard urethane foam Can be prevented from peeling off. In addition, since the inclined portion has a flat surface, the side length is shortened, the vacuum heat insulating material can be reduced, and the heat absorption load into the refrigerator can be reduced by shortening the side length. Furthermore, a vacuum heat insulating material is previously arranged on the heat insulating member, and the box body can be assembled, which facilitates manufacture.
[0121]
Further, the invention of the refrigerator according to claim 6 of the present invention is characterized in that, in the invention according to any one of claims 1 to 5, by providing a hole for venting hard urethane foam on the inner surface of the inner box, Vacuum insulation can be placed on the back of the box. Further, there is no air vent hole in the outer box, so that the appearance can be kept beautiful. Also, the back of the outer box of another refrigerator can be used also, and the number of parts and the number of steps can be reduced.
[0122]
According to a seventh aspect of the present invention, there is provided a refrigerator according to any one of the first to sixth aspects, wherein the position of the lower end of the vacuum heat insulating material disposed in contact with the outer box on both upper side surfaces. Is lower than the upper end position of the vacuum heat insulating material disposed in contact with the inner box on both sides of the lower portion, so that when the vacuum heat insulating material is disposed, even if it is slightly shifted in the vertical direction, Even if the dimensional accuracy of the heat insulating material is reduced, the outer case may be located at the boundary between the upper side surfaces where the vacuum heat insulating material is placed in contact with the outer case and the lower side surfaces where the vacuum heat insulating material is placed in contact with the inner case. Since the vacuum heat insulating material is present in at least one of the inner boxes, a reduction in the heat insulating effect of the vacuum heat insulating material can be prevented. Further, a stable flow can be achieved without obstructing the flow of the rigid urethane foam.
[0123]
Further, the invention of a refrigerator according to claim 8 of the present invention is directed to a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein the vacuum heat insulating material has an aluminum surface. A vapor-deposited film, the other surface of which is formed of a film having a metal foil, a sealing surface which seals an outer peripheral portion of each of the aluminum-deposited film and the film having the metal foil is a flat surface on the aluminum-deposited film side in the vacuum heat insulating material. It is on the same plane as the vacuum heat insulating material, one plane requiring high heat insulating property is formed of an aluminum vapor-deposited film, and the other surface requiring high gas barrier property is formed of a film having a metal foil, Since the sealing surfaces of both films are located on the same plane as the plane on the aluminum-deposited film side, fins on the sealing surfaces can be easily treated, and reliability and heat insulation are high. Excellent use of vacuum insulation material is made possible was of.
[0124]
Further, in the refrigerator according to the ninth aspect of the present invention, in the invention according to the eighth aspect, the flat surface of the vacuum heat insulating material on the aluminum-deposited film side is disposed so as to be in contact with the inner side of the outer box. A vacuum heat insulating material having high heat resistance and excellent heat insulating performance can be effectively disposed, and fin treatment on the sealing surface is not required.
[0125]
In the refrigerator according to the tenth aspect of the present invention, in the invention according to the eighth aspect, the flat surface of the vacuum heat insulating material on the side of the aluminum vapor-deposited film is disposed in contact with the outer side of the inner box, so that the refrigerator is reliable. A vacuum heat insulating material having high heat resistance and excellent heat insulating performance can be effectively disposed, and fin treatment on the sealing surface is not required.
[0126]
Moreover, the invention of the refrigerator according to claim 11 of the present invention is such that the heat radiating pipe is fixed to the inside of the outer box by a seal material provided to the outside of the refrigerator, and the heat radiating pipe is sandwiched between the outer box and the heat radiating pipe. By disposing the vacuum heat insulating material inside the outer box, the heat of the heat radiating pipe can be reliably insulated by the vacuum heat insulating material, and the heat absorption load in the refrigerator can be reduced efficiently. Furthermore, since the sealing material is disposed outside the refrigerator, the air between the heat radiation pipe and the outer case can be freely moved to the outside of the refrigerator, and unevenness and waving of the outer case surface due to heat shrinkage of the air can be suppressed. It can maintain the beauty of the appearance. Further, the work of attaching the heat radiating pipe can be easily performed without worrying about the amount of air between the heat radiating pipe and the outer box.
[0127]
The refrigerator according to the twelfth aspect of the present invention uses the sealing material according to the eleventh aspect of the present invention, which has a split or perforated structure. Air can freely move out of the refrigerator, unevenness and undulation on the outer box surface due to heat shrinkage of the air can be suppressed, and the appearance can be maintained beautifully. Further, the work of attaching the heat radiating pipe can be easily performed without worrying about the amount of air between the heat radiating pipe and the vacuum heat insulating material.
[0128]
Further, in the refrigerator according to the thirteenth aspect of the present invention, in the invention according to the eleventh aspect, the heat radiating pipe is disposed inside the outer box, avoiding a location serving as a top surface of the refrigerator, The heat of the heat radiating pipe is reliably insulated by the vacuum heat insulating material to reduce the heat absorption load into the refrigerator, and the heat insulation performance of the vacuum heat insulating material is better than that of hard urethane foam, so the heat absorption of the refrigerator is reduced. This makes it possible not to dispose the heat radiating pipe on the top surface, the vacuum heat insulating material can be easily attached to the top surface, and the effect of energy saving can be enhanced. Further, since there is no heat radiating pipe on the top surface, the shape of the heat radiating pipe is simplified, so that it is possible to improve workability, reduce man-hours, and reduce material costs. Further, since there is no heat radiation pipe on the top surface, it can be used also as a heat radiation pipe of another refrigerator.
[0129]
Moreover, the invention of the refrigerator according to claim 14 of the present invention is characterized in that a vacuum heat insulating material incorporating a heat radiating pipe on a surface in contact with the outer box is disposed inside the outer box, so that the outer box and the vacuum heat insulating material The gap between the heat-radiating pipe and the vacuum insulation material can be made smaller than when the heat-radiating pipe is fixed inside the outer box before the heat-radiating pipe is sandwiched between them, and unevenness and waving on the outer box surface can be suppressed. The beauty of the appearance can be maintained. Further, the heat insulating effect of the vacuum heat insulating material can be enhanced, and the energy saving effect can be enhanced. Further, since the heat radiating pipe can be arranged on the vacuum heat insulating material in advance and assembled, the manufacturing becomes easy.
[0130]
Further, the invention of a refrigerator according to claim 15 of the present invention comprises a hard urethane foam and a vacuum heat insulating material both sides of which are formed of a film having a metal foil, between an outer box and an inner box. Yes, by using metal foil with high gas barrier properties for both sides of the film, it is possible to use highly reliable vacuum insulation even when both sides of the vacuum insulation are in contact with the surface of complicated shape . Further, since both surfaces are made of the same material, cost can be reduced. Furthermore, since both surfaces are made of the same material, the operation can be easily performed without worrying that the surface to which the vacuum heat insulating material is attached is mistaken when attaching to the outer box or the inner box.
[0131]
Further, in the refrigerator according to claim 16 of the present invention, the vacuum heat insulating material is not provided between the outer box and the inner box, and the sealing margin of the film of the vacuum heat insulating material is not positioned in the direction in which the rigid urethane foam flows. By arranging in a state, a stable flow can be achieved without obstructing the flow of the rigid urethane foam. In addition, the rigid urethane foam when injected between the outer box and the inner box is in a highly humid state, and because it does not come into direct contact with the sealing margin of the film, it does not receive thermal stress and prevents deterioration of the vacuum insulation material can do. Further, the sealing algebra is reduced, and the vacuum heat insulating material can maintain high gas barrier properties.
[0132]
In the refrigerator according to claim 17 of the present invention, a vacuum heat insulating material is provided between the inner box and the defrosting water pipe provided between the outer box and the inner box. Thereby, the temperature of the defrost water can be maintained by the vacuum heat insulating material, and the defrost water can be prevented from being cooled and frozen.
[0133]
In the refrigerator according to the eighteenth aspect of the present invention, the vacuum heat insulating material is provided between the outer box and the inner box in a place where there is a foreign matter that may hinder the flow of the rigid urethane foam. Thus, the heat absorption load of the refrigerator can be effectively suppressed by the vacuum heat insulating material, and the effect of energy saving can be enhanced. In addition, heat insulation performance can be ensured by arranging a vacuum heat insulating material in a place where there is a foreign substance that may hinder the flowability of the rigid urethane foam.
[0134]
Further, the invention of a refrigerator according to claim 19 of the present invention provides a vacuum insulation material on the bottom surface of the inner box by arranging the vacuum insulation material on the outside of the bottom surface of the inner box having a flat surface formed in the width direction of the refrigerator. The area of the bottom surface can be reduced at the same time as the bonding area of the base material can be increased, and the energy saving effect can be enhanced. Further, it is possible to improve the adhesiveness of the vacuum heat insulating material.
[0135]
The invention of a refrigerator manufacturing method according to claim 20 of the present invention is a refrigerator manufacturing method comprising a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, wherein the vacuum heat insulating material is not attached. By adding a step of removing foreign matter on the surface in contact with the vacuum heat insulating material, damage to the vacuum heat insulating material due to the foreign matter can be eliminated, and the reliability of the attaching step can be improved.
[0136]
The refrigerator manufacturing method according to claim 21 of the present invention comprises a rigid urethane foam and a vacuum heat insulator between an outer box and an inner box, and the vacuum box is attached to the outer box. In the manufacturing method, the positioning of the vacuum heat insulating material is performed by using the protection member provided on the end face of the outer box so as to protect the end face, so that the protection member for the outer box end face and the positioning member for the vacuum heat insulating material are shared. Can be achieved. In addition, breakage of the vacuum heat insulating material can be eliminated. Further, positioning at the time of attaching the vacuum heat insulating material becomes easy, and workability can be improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the refrigerator according to the embodiment.
FIG. 3 is an enlarged longitudinal sectional view of a main part of a vacuum heat insulating material applied to the refrigerator of the embodiment.
FIG. 4 is a partially enlarged cross-sectional view of the refrigerator according to the embodiment.
FIG. 5 is a partially enlarged sectional view of the refrigerator of the embodiment.
FIG. 6 is a cross-sectional view of the refrigerator according to the second embodiment of the present invention.
FIG. 7 is a partially enlarged cross-sectional view of the vicinity of a heat radiation pipe of the refrigerator of the embodiment.
FIG. 8 is a perspective view of a flat plate of an outer box of a refrigerator before bending according to Embodiment 3 of the present invention.
FIG. 9 is an enlarged sectional view of a main part of a refrigerator according to a fourth embodiment of the present invention.
FIG. 10 is an enlarged sectional view of a main part of a refrigerator according to a fifth embodiment of the present invention.
FIG. 11 is an enlarged sectional view of a main part when positioning a vacuum heat insulating material on an outer box in a refrigerator in a sixth embodiment of the present invention.
FIG. 12 is a longitudinal sectional view of a conventional refrigerator.
[Explanation of symbols]
22 inner box
22a Rigid urethane foam air vent
23 Outer box
24 rigid urethane foam
30 Machine Room
41, 42, 43, 44, 44a, 45, 46, 47, 48, 49, 50 Vacuum insulation
53 Deposition layer film
55 Aluminum evaporated film
57 Metal foil layer film
59 aluminum foil
61 Heat radiation pipe
62 aluminum tape
72 Defrost water piping
73 Protective member

Claims

In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, and a machine room disposed at a lower portion, the vacuum heat insulating material is provided on both upper side surfaces, a top surface, a back surface, and a front surface of the refrigerator. A refrigerator disposed in contact with the outer box, and being disposed in contact with the inner box with respect to the bottom surface, the lower side surfaces, and the surfaces constituting the machine room.

The refrigerator according to claim 1, wherein the vacuum heat insulating material disposed in contact with the inner box does not protrude from each surface of the inner box in which the vacuum heat insulating material is disposed in contact.

On the surface of the inner box in which the vacuum heat insulating material is provided in contact with the surface, a convex portion surrounding the outer periphery of the vacuum heat insulating material or a concave portion for accommodating the vacuum heat insulating material so as to reduce the exposed area of the end surface of the vacuum heat insulating material. The refrigerator according to claim 1, wherein the refrigerator is provided.

4. A heat insulating member having a predetermined inclined shape for defrosting water treatment formed on an upper surface thereof and having a flat lower surface and closely attached to an inner box is provided below the cooler. A refrigerator according to one of the preceding claims.

The portion of the inner box between a portion located below the cooler in the inner box and having a predetermined inclined shape for defrost water treatment and a vacuum heat insulating material disposed in contact with the inner box. The refrigerator according to any one of claims 1 to 3, further comprising a heat insulating member that fills a gap formed between the vacuum heat insulating material and the vacuum heat insulating material.

The refrigerator according to any one of claims 1 to 5, wherein a hole for venting air of a rigid urethane foam is provided on a back surface of the inner box.

The lower end position of the vacuum heat insulating material disposed in contact with the outer box on both upper side surfaces is lower than the upper end position of the vacuum heat insulating material disposed in contact with the inner box on the lower both side surfaces. Item 7. The refrigerator according to any one of Items 1 to 6.

In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box, the vacuum heat insulating material has one surface formed of an aluminum vapor-deposited film and the other surface formed of a film having a metal foil, A refrigerator characterized in that a sealing surface which seals an outer peripheral portion of each of the aluminum-deposited film and the film having the metal foil is on the same plane as a plane on the aluminum-deposited film side of the vacuum heat insulating material.

9. The refrigerator according to claim 8, wherein a flat surface of the vacuum heat insulating material on the side of the aluminum-deposited film is disposed in contact with the inside of the outer box.

The refrigerator according to claim 8, wherein a flat surface of the vacuum heat insulating material on the side of the aluminum-deposited film is disposed in contact with the outer side of the inner box.

The heat radiation pipe is fixed to the inside of the outer box by a seal material disposed outside the refrigerator, and the vacuum heat insulating material is disposed inside the outer box so as to sandwich the heat radiation pipe between the outer box and the heat radiation pipe. And refrigerator.

The refrigerator according to claim 11, wherein the sealing material is divided or perforated.

12. The refrigerator according to claim 11, wherein the heat radiating pipe is disposed inside the outer box, avoiding a portion serving as a top surface of the refrigerator.

A refrigerator characterized in that a vacuum heat insulating material having a heat radiating pipe incorporated in a surface in contact with the outer box is disposed inside the outer box.

A refrigerator comprising, between an outer box and an inner box, a rigid urethane foam and a vacuum heat insulating material composed of a film having metal foil on both sides.

A refrigerator, wherein a vacuum heat insulating material is provided between the outer case and the inner case in a state where the sealing margin of the film of the vacuum heat insulating material is not positioned in the direction in which the rigid urethane foam flows.

A refrigerator, wherein a vacuum heat insulating material is provided between the inner box and the defrost water pipe provided between the outer box and the inner box.

A refrigerator, wherein a vacuum heat insulating material is provided between an outer box and an inner box in a place where there is a foreign matter that may hinder the flow of the rigid urethane foam.

A refrigerator characterized in that a vacuum heat insulating material is in contact with and disposed outside a bottom surface of an inner box having a flat surface formed in a width direction of the refrigerator.

A method for manufacturing a refrigerator comprising a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, comprising a step of removing foreign matter on a surface in contact with the vacuum heat insulating material before attaching the vacuum heat insulating material, Refrigerator manufacturing method.

In a method for manufacturing a refrigerator, comprising a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, and attaching the vacuum heat insulating material to the outer case, a protective member provided on the end surface of the outer case so as to protect the end surface A method for manufacturing a refrigerator, comprising: positioning a vacuum heat insulating material by using a method.