JP3644860B2

JP3644860B2 - refrigerator

Info

Publication number: JP3644860B2
Application number: JP35117899A
Authority: JP
Inventors: 政雄宮本; 浩二土橋; 宏吉村
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 1999-12-10
Filing date: 1999-12-10
Publication date: 2005-05-11
Anticipated expiration: 2019-12-10
Also published as: JP2001165551A

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of making a temperature in a storage chamber uniform and preventing a dew formation. SOLUTION: The refrigerator comprises a storage chamber 11 for containing a storage article, a cooler 21 for generating cold air flowing to the chamber 11, a cold air passage 28 having a rising passage 28b for allowing cold air to rise and a falling passage 28b for allowing the air passing the passage 28b to fall and introducing the air to the chamber 11 and provided at the chamber 11 through a partition wall, and a member 42 disposed in the passage 28a to form at least the part of the wall and to exhaust a cold heat by the air flowing through the passage 28 into the chamber 11.

Description

【０００１】
【発明の属する技術分野】
本発明は冷気を貯蔵室内に送出する冷蔵庫に関する。
【０００２】
【従来の技術】
従来の冷蔵庫の部分側面断面図を図９に示す。冷蔵庫１は外部を覆う外箱２ａの内側に内箱２ｂが配され、外箱２ａと内箱２ｂとの隙間には発泡ポリウレタン等の断熱材２ｃが充填されている。内箱２ｂにより覆われる冷蔵室１１の前面は回動式の断熱扉３により開閉可能になっている。
【０００３】
冷蔵室１１の下部には隔離室である氷温室１４が設けられ、その下方には野菜室１２が配されている。野菜室１２の前面はスライド式の断熱扉４により開閉可能になっている。冷蔵室１１と野菜室１２は樹脂成形品から成る仕切板３１、３２によって仕切られている。仕切板３２には貫通口３２ａが設けられている。
【０００４】
冷蔵室１１及び氷温室１４の背後には冷却器（不図示）により生成される冷気が送風機（不図示）により送出されて流通する冷気通路２８が設けられている。冷蔵室１１の背面には冷気通路２８に面する部材４２が設けられている。氷温室１４の背面には断熱材３６を介して冷気通路２８に面する背面板３５が設けられている。
【０００５】
冷気は部材４２及び断熱材３６に設けられた開口部４２ａ、３６ａを介して冷蔵室１１に流入し、冷蔵室１１内を冷却する。そして、該冷気は自重により降下し、貫通孔３２ａから冷気通路３０を通って野菜室１２内に流入する空気流を形成する。これにより、野菜室１２内が冷却される。
【０００６】
また、部材４２は金属板等から成り、冷気通路２８を流通する冷気による冷熱を伝えて冷蔵室１１内に放出するようになっている。従って、冷蔵室１１は部材４２の全面から放出される冷熱により均一に冷却されるようになっている。更に、冷却器の停止中に、蓄積した冷熱を放出して冷蔵室１１内の保冷を行うようになっている。
【０００７】
【発明が解決しようとする課題】
しかしながら、上記の従来の冷蔵庫によると、部材４２の全面から放出される冷熱により冷蔵室１１は冷却されるが、冷気通路２８内を流れる冷気量が多くなった場合等に冷蔵室１１内と冷気通路２８内との間の温度差が大きくなる。これにより、部材４２の冷蔵室１１側の表面に結露が生じる。その結果、冷蔵室１１内が乾燥して冷蔵室１１に貯蔵される食品等が早く劣化する問題があった。
【０００８】
また、送風機により冷気通路２８内に送出される冷気の圧力は変動するので、結露を防止するために冷気通路２８内を流れる冷気量を少なくすると、冷気が流れない場合が生じる。このため、冷蔵室１１内に放出される冷熱の量がばらつき、貯蔵室内の温度が不均一になるという問題もあった。
【０００９】
本発明は、貯蔵室内の温度の均一化を図るとともに結露を防止できる冷蔵庫を提供することを目的とする。
【００１０】
【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冷蔵庫は、貯蔵物を収納する貯蔵室と、前記貯蔵室に流入する冷気を生成する冷却器と、冷気が上昇する上昇通路と前記上昇通路を通った冷気が下降する下降通路とを有して該冷気を前記貯蔵室に導く冷気通路と、前記下降通路側に配されるとともに前記下降通路内を流通する冷気による冷熱を前記貯蔵室内に放出する部材とを備え、前記部材を前記上昇通路に面して延設し、前記下降通路と連通する隙間を介して前記部材と前記上昇通路とを隔離する断熱部材を設けたことを特徴としている。
【００１１】
この構成によると、冷却器により生成される冷気は上昇通路を上昇した後、下降通路を下降して貯蔵室に流入する。そして、下降通路を通る冷気による冷熱は熱伝導性を有する熱伝導部材に伝達され、前記部材の全面から一様に冷熱が貯蔵室内に放出される。
【００１２】
また本発明の冷蔵庫は、貯蔵物を収納する貯蔵室と、前記貯蔵室に流入する冷気を生成する冷却器と、冷気が上昇する上昇通路と前記上昇通路を通った冷気が下降する下降通路とを有して該冷気を前記貯蔵室に導くとともに前記貯蔵室と隔壁を介して設けられる冷気通路と、前記下降通路側に配されるとともに前記隔壁の少なくとも一部を形成して前記下降通路内を流通する冷気による冷熱を前記貯蔵室内に放出する部材とを備え、前記部材を前記上昇通路に面して延設し、前記下降通路と連通する隙間を介して前記部材と前記上昇通路とを隔離する断熱部材を設けたことを特徴としている。
【００１３】
この構成によると、冷却器により生成される冷気は上昇通路を上昇した後、下降通路を下降して貯蔵室に流入する。そして、下降通路を通る冷気による冷熱は貯蔵室との隔壁を成して熱伝導性を有する熱伝導部材に伝達され、前記部材の全面から一様に冷熱が貯蔵室内に放出される。
【００１４】
また、前記冷気通路から前記貯蔵室内に冷気を吐出する吐出口を前記部材の左右両側の横の位置に設けたことを特徴とする。また、前記部材は前記貯蔵室の内壁の一部を形成するとともに、熱伝導性の金属からなることを特徴とする。また、前記冷気通路は、前記冷却器から前記隔壁と前記断熱部材で隔離された前記上昇通路に至るまでの少なくとも一部分が断熱性の材料を用いて形成されていることを特徴とする。また本発明は、上記構成の冷蔵庫において、前記冷却通路を前記貯蔵室の背後に配し、前記貯蔵室の横方向の略中央に配される前記下降通路の下部に冷気を吐出する開口部を設けたことを特徴としている。この構成によると、下降通路を通る冷気は左右方向における貯蔵室の略中央の下部から貯蔵室内に流入する。
【００１５】
また本発明は、上記構成の冷蔵庫において、前記上昇通路を前記下降通路の両側部に配し、前記上昇通路から貯蔵室内に冷気を吐出する吐出口を、前記上昇通路と前記下降通路の隔壁と、前記貯蔵室の側壁との略中央に設けたことを特徴としている。この構成によると、貯蔵室の側壁と下降通路との間に配される上昇通路を上昇する冷気は吐出口から貯蔵室内に流入する。
【００１７】
また本発明は、上記構成の冷蔵庫において、前記貯蔵室の天井部に前記上昇通路の上端から冷気が流入する天井ダクトを備え、前記貯蔵室に向けて冷気を吐出する複数の天井吐出部を前記天井ダクトの左右に分散して設けたことを特徴としている。この構成によると、下降通路の両側部に設けられる上昇通路内を上昇する冷気は下降通路及び天井ダクトに流入する。天井ダクトを通る冷気は天井吐出部から左右に分散して貯蔵室内に流入する。
【００１９】
また本発明は、上記構成の冷蔵庫において、前記部材及び前記断熱部材を着脱自在にしたことを特徴としている。
【００２０】
【発明の実施の形態】
以下に本発明の実施形態を図面を参照して説明する。説明の便宜上、図９の従来例と同一の部分には同一の符号を付している。図１は一実施形態の冷蔵庫を示す側面断面図である。冷蔵庫１は外部を覆う外箱２ａの内側に内箱２ｂが配され、外箱２ａと内箱２ｂとの隙間には発泡ポリウレタン等の断熱材２ｃが充填されている。冷蔵庫１の内部は上から冷蔵室１１、野菜室１２、冷凍室１３の順に区分けされている。
【００２１】
野菜室１２と冷凍室１３は断熱材から成る仕切枠１７及び断熱材から成る仕切板１９に仕切られており、冷凍室１３は更に断熱材から成る仕切枠１８により上部と下部に仕切られている。冷蔵室１１と野菜室１２は断熱材から成る仕切枠１６及び樹脂成形品から成る仕切板３１、３２によって仕切られている。仕切板３２には貫通口３２ａが設けられている。
【００２２】
冷蔵室１１の下部には仕切板４６で仕切られる隔離室である氷温室１４が設けられている。冷蔵室１１には複数の棚４５が設けられている。冷蔵室１１の前面は回動式の断熱扉３により開閉可能になっている。野菜室１２、冷凍室１３の上部及び冷凍室１３の下部は前面が夫々スライド式の断熱扉４、５、６により開閉可能になっており、収納容器５４、５５、５６を引出せるようになっている。
【００２３】
冷凍室１３の後部には圧縮機２０が配されている。圧縮機２０には吐出パイプ２０ａを介して凝縮器（不図示）が連結されており、吸込パイプ２０ｂを介して冷却器２１が連結されている。凝縮器と冷却器２１はキャピラリーチューブ（不図示）を介して連結されている。
【００２４】
これにより冷凍サイクルが構成され、冷凍サイクル運転が行われると冷却器２１が冷却されるようになっている。冷却器２１の下方には冷却器２１の除霜を行う除霜ヒータ６２が設けられている。６４はドレン受け部材である。
【００２５】
冷却器２１は冷気通路２３内に配されており、冷気通路２３の下部は内箱２ｂと樹脂成形品から成るエバカバー３３とにより形成されている。冷気通路２３内の冷却器２１の上方には送風機２２が配されている。冷気通路２３は背面板３３ａに設けられた流入口１３ａ、１３ｃ及び流出口カバー３３ｂに設けられた流出口１３ｂにより冷凍室１３と連通している。
【００２６】
冷気通路２３は送風機２２の上方に配される冷気通路２８とダンパー６５を介して連通している。冷気通路２８の下部は氷温室１４の背面板３５に固着される断熱部材３６と内箱２ｂとにより形成されている。冷気通路２８の上部は冷蔵室１１の内壁を形成する部材４２と内箱２ｂ上に設けられた背面板７０とにより形成されている。背面板７０は上記の背面板３５と一体に形成されている。
【００２７】
冷蔵室１１の正面図を図２に示すと、冷気通路２８は略中央に配される下降通路２８ａと、下降通路２８ａの両側部に分岐する上昇通路２８ｂとを有している。下降通路２８ａと上昇通路２８ｂの隔壁となるリブ２８ｄは背面板７０と一体に形成されている。
【００２８】
そして、下降通路２８ａは冷気通路２３からの冷気が直接侵入しないように下方が閉塞され、上昇通路２８ｂとは連通孔２８ｇで連通している。下降通路２８ａの下端には冷蔵室１１に向けて開口する開口部４２ａが設けられている。冷気通路２８を通る冷気は上昇通路２８ｂを上昇して下降通路２８ａに導かれ、下降通路２８ａを下降して開口部４２ａから冷蔵室１１内に流入するようになっている。
【００２９】
背面板３５と断熱部材３６には同じ位置に開口部３５ａ、３６ａが設けられている。また、上昇通路２８ｂから下方に向けて分岐する分岐通路２８ｈを介して開口部３５ｃ、３６ｃ（３６ｃは不図示）が設けられている。開口部３５ａ、３６ａ、３５ｃ、３６ｃにより氷温室１４は冷気通路２８と連通している。
【００３０】
部材４２は図４に示すような形状の熱伝導性を有する熱伝導部材（例えば、加工性が良く防錆効果の高いアルミニウム合金やステンレス等）から形成されている。これにより蓄冷及び冷熱の放出を可能にしている。なお、前記熱伝導部材の厚みが厚い場合は蓄冷能力が上がり、強度も増加する。厚みが薄い場合は冷熱の放出効率が上がり、軽量化にも有利である。そのため、目的に応じて薄板材や厚板材を適時適所に選び設ければよい。
【００３１】
部材４２の表面に凹凸形状をプレス加工等により設けると、表面積を増加させることができる。これにより蓄冷や冷熱の放出量が増加して冷却効率の向上を図ることができる。更に、線状に連続する凹部または凸部を設けることにより、部材４２の強度を補強することができる。
【００３２】
部材４２の上端と下端部分の断面詳細図を図６、図７に示す。これらの図によると、部材４２は背面板７０に設けられた上取付部７１及び背面板３５に設けられた下取付部７２により係止される。上取付部７１のレバー部７１ａを手指で押上げると爪部７１ｂの係合が解除される。
【００３３】
この状態で部材４２の上部を手前に倒して、上方に引上げることにより部材４２を脱着でき、部材４２は着脱自在になっている。これにより冷気通路２８や部材４２の冷気通路２８側の清掃等を容易に行うことができるようになっている。尚、部材４２の下部は断熱部材３６に固着されるシール材７３により密閉されている。
【００３４】
また、部材４２の下端部分を図８に示すように構成してもよい。即ち、部材４２の下端に係止部４２ｂを形成し、背面板３５には開口３５ｄを形成する。そして、係止部４２ｂと開口３５ｄとを係合させて部材４２を係止する。開口３５ｄは断熱部材３６により覆われて密閉されている。これにより上記のシール材７３を省くことができる。
【００３５】
冷蔵室１１の上部の断面図を図３に示すと、部材４２は上昇通路２８ｂに対峙する部分まで延設した延設部４２ｆが設けられている。延設部４２ｆの上昇通路２８ｂ側の面には、隙間２８ｆを介して断熱部材２８ｃが配されている。そして、部材４２を脱着しすると断熱部材２８ｃを取り外すことができるようになっている。
【００３６】
下降通路２８ａを通る冷気による冷熱は部材４２に伝達され、上昇通路２８ｂを通る冷気の冷熱の多くは、断熱部材２８ｃにより部材４２に伝達されない。そして、上昇通路２８ｂに対峙する延設部４２ｆは下降通路２８ａから隙間２８ｆに侵入する冷気によって冷熱が伝達されるようになっている。
【００３７】
上昇通路２８ｂの側壁７０ｆは背面板７０により形成されており、側壁７０ｆには複数の開口部７０ａが設けられている。背面板７０には部材４２の外側周辺を覆う壁面部７０ｃが形成されている。壁面部７０ｃには開口部７０ａと連通する複数の吐出部７０ｂが凹設されている。従って、吐出部７０ｂ及び開口部７０ａを介して、上昇通路２８ｂは冷蔵室１１と連通し、冷気を冷蔵室１１に吐出できるようになっている。
【００３８】
前述の図２において、壁面部７０ｃは載置部７４に載置される棚４５と同じ高さ付近に形成され、棚４５（図１参照）上に載置される食品等が吐出部７０ｂに落下しないようになっている。そして、開口部７０ａは貯蔵物が上昇通路２８ｂに落込まないようにスリット状になっている。また、背面板７０には冷気を吐出部７０ｂに導くリブ７０ｄが形成されている。
【００３９】
冷蔵室１１の天井部分には樹脂成形品から成る上面板４３と内箱２ｂとにより天井ダクト５４が形成されている。天井ダクト５４は左右に並設されており、上昇通路２８ｂと連通して冷気が導かれる。そして、上面板４３の前後方向に複数設けられた天井吐出部４３ａにより左右に分散して冷気が吐出される。
【００４０】
分岐された上昇通路２８ｂにより、冷気は天井ダクト５４に流入する前に左右に拡散されているため、冷蔵室１１の背壁に近い位置に設けられた天井吐出部４３ａからも充分冷気が吐出されるようになっている。尚、左右の天井ダクト５４の間には透明な照明カバー５３で覆われる照明灯５１が設けられている。
【００４１】
上記構成の冷蔵庫１において、送風機２２が駆動されると、冷凍室１３内の空気は流出口１３ｂから冷気通路２３に導かれる。該空気は冷却器２１と熱交換して冷却され、流入口１３ａから冷凍室１３に流入する。これにより冷凍室１３内が冷却される。
【００４２】
また、冷却器２１と熱交換した冷気はダンパー６５を介して冷却通路２８内を流通する。該冷気の一部は開口部３５ａ、３６ａから氷温室１４に流入する。また、上昇通路２８ｂから分岐する分岐通路２８ｈを通る冷気が開口部３５ｃ、３６ｃ（３６ｃは不図示）から氷温室１４に流入する。これにより、氷温室１４内が例えば−１℃に冷却される。尚、分岐通路２８ｈ内に侵入する冷気は自重により下降するため、若干高温の氷温室１４内の冷気が開口部３５ｃから逆流することを防止できるようになっている。
【００４３】
他の冷気は左右の上昇通路２８ｂを分岐して進行する。上昇通路２８ｂを通る冷気はリブ７０ｄに案内されて吐出部７０ｂから冷蔵室１１内に吐出される。連通孔２８ｇから下降通路２８ａに侵入して下降する冷気は、開口部４２ａから冷蔵室１１内に吐出される。上昇通路２８ｂから天井ダクト５４に侵入する冷気は、天井吐出部４３ａから左右に分散して吐出される。
【００４４】
また、下降通路２８ａ内を流通する冷気による冷熱の一部は部材４２に伝えられる。そして、少量の冷気は隙間２８ｆに流入する。この時、断熱部材２８ｃに面する部材４２の延設部４２ｆは、隙間２８ｆを通る冷気により冷熱が伝えられる。そして、部材４２の全面から冷蔵室１１内に冷熱として放出される。従って、部材４２からの冷熱と、吐出部７０ｂ及び天井吐出部４３ａから分散して吐出される冷気とにより、冷蔵室１１内が効率良く均一に冷却される。
【００４５】
冷蔵室１１内の空気は棚４５の間や棚４５の前面を通り氷温室１４の下方から開口部３２ａを介して冷気通路３０を流通し、野菜室１２内の前方に流入する。更に収納容器５４の前面から下方を通り、野菜室１２内が冷却される。そして、流出口（不図示）からダクト（不図示）を通り冷却器２１の下部に導かれて冷気が循環する。
【００４６】
冷蔵室１１内の温度を検知する冷蔵室温度検知部（不図示）の検知結果に基づいて圧縮機２０及び送風機２２が運転及び停止され、冷蔵室１１及び野菜室１２の温度は例えば３℃に維持されるようになっている。
【００４７】
本実施形態によると、下降通路２８ａ及び隙間２８ｆを通る冷気の冷熱の一部は熱伝導板として機能する部材４２を熱伝導し、部材４２の全面から冷蔵室１１内に放出される。従って、冷蔵室１１は下降通路２８ａと上昇通路２８ｂを覆う広い面積から一様に放出される冷熱により均一に冷却される。
【００４８】
この時、断熱部材２８ｃにより、上昇通路２８ｂを通る冷気から部材４２に多くの冷熱は伝達されないため、冷気通路２８に多くの冷気を流した際に部材４２に伝達される冷熱量が制限され、部材４２の結露を防止することができる。そして、断熱部材２８ｃの面積や厚みを可変することにより、所望の温度や流量の冷気を流通させることができる。
【００４９】
尚、冷気通路２８を通る冷気の温度が低い場合や、冷気の流量が増加した場合等の冷却能力が上昇した際に、部材４２の冷気による冷却を和らげて下降通路２８ａ付近の部材４２の冷蔵室１１側に結露を防止するために、厚みの薄い断熱部材を下降通路２８ａの部材４２側にも設けてもよい。
【００５０】
また、上昇通路２８ｂを通過し、下降通路２８ａを通る冷気から伝達される冷熱が部材４２から放出される。この為、送風機２２に送出されて冷気通路２８に侵入した直後の冷気は圧力が変動して脈流となっているが、連通孔２８ｇを通って下降通路２８ａを通る冷気は圧力が低下して整流となっている。これにより、冷気量が少ない場合においても冷蔵室１１内に放出される冷熱の量が安定し、貯蔵室内の温度を均一にすることができる。
【００５１】
また、吐出部７０ｂ及び天井吐出部４３ａは冷蔵室１１の背面及び上面に複数設けられるため、冷気が分散して冷蔵室１１に流入する。このため、冷蔵室１１は均一且つ迅速に冷却される。
【００５２】
ここで、部材４２は図５に示すように、ゼリー状や液状の保冷材４２ｃを包装材４２ｄ、４２ｅにより封入した蓄冷部材にしてもよい。このようにすると、部材４２は冷気通路２８内を流通する冷気の冷熱でより蓄冷され、冷蔵室１１内の温度分布に応じて冷熱として放出する。従って、冷蔵室１１が均一に冷却される。
【００５３】
更に、蓄冷部材により圧縮機２０の停止中や冷気通路２８内の冷気温度の変動に対して吸熱や放熱を行い、冷気通路２８内の冷気温度を維持することができるようになる。この時、該蓄冷部材が冷蔵室１１の内壁を形成しているので冷蔵室１１のスペースを広くすることができ、冷蔵庫１の省スペース化を図ることができる。包装材４２ｄ、４２ｅを熱伝導性を有するアルミニウム合金やステンレスにするとより望ましい。
【００５４】
【発明の効果】
本発明によると、部材には上昇通路を通る冷気からの冷熱が伝達されず、大部分が下降通路を通る冷気から伝達される。このため、上昇通路から下降通路に至るまでの間に生じる冷気の温度上昇や貯蔵室内への一部吐出により、部材に伝達される冷熱の量が制限される。これにより、低温または多量の冷気を冷気通路に流通させて冷却能力を向上させた場合であっても、貯蔵室は部材から一様に放出される冷熱により均一に冷却されるとともに部材の結露を防止できる。また、部材を上昇通路に面して延設し、下降通路と連通する隙間を介して部材と上昇通路とを隔離する断熱部材を設けているので、下降通路を流通する少量の冷気による冷熱を部材に伝達して上昇通路と下降通路とを覆う大きな面積から放出させることができる。これにより、貯蔵室内の温度をより均一にすることができる。
【００５５】
更に、送風機の送出により冷気通路に侵入した直後の冷気は圧力が変動して脈流となっているが、上昇通路から下降通路を通って貯蔵室内に冷気が放出されるまでの間に圧力が低下して整流となる。これにより、貯蔵室内に放出される冷熱の量が安定し、貯蔵室内の温度を均一にすることができる。
【００５６】
また本発明によると、上昇通路から冷気が吐出される吐出口を、左右方向の略中央に配される下降通路と上昇通路の隔壁と、貯蔵室の側壁との略中央に設けているので、下降通路から左右方向の略中央に放出される冷熱と、吐出口から吐出される冷気とによって、貯蔵室内が均一に冷却される。
【００５８】
また本発明によると、下降通路の両側部に設けられる上昇通路に連通する天井ダクトに左右に分散する天井吐出口を設けているので、天井ダクト内に侵入する前に冷気は左右に分散されている。従って、天井吐出口を貯蔵室の背壁の近傍に設けても貯蔵室内に吐出させることができ、貯蔵室の奥行方向にも温度を均一にすることができる。
【００６０】
また本発明によると、部材及び断熱部材を着脱自在にしているので、冷気通路や部材及び断熱部材の冷気通路側を容易に掃除することができ、貯蔵室内に吐出される冷気を清潔の保持することができる。
【図面の簡単な説明】
【図１】本発明の実施形態の冷蔵庫の側面断面図である。
【図２】本発明の実施形態の冷蔵庫の冷蔵室の正面図である。
【図３】本発明の実施形態の冷蔵庫の上面断面図である。
【図４】本発明の実施形態の冷蔵庫の部材を示す斜視図である。
【図５】本発明の実施形態の冷蔵庫の他の部材を示す斜視図である。
【図６】本発明の実施形態の冷蔵庫の部材の上端の取付方法を示す要部断面図である。
【図７】本発明の実施形態の冷蔵庫の部材の下端の取付方法を示す要部断面図である。
【図８】本発明の実施形態の冷蔵庫の部材の他の取付方法を示す要部断面図である。
【図９】従来の冷蔵庫の正面断面図である。
【符号の説明】
１冷蔵庫
２ａ外箱
２ｂ内箱
３、４、５、６断熱扉
１１冷蔵室
１２野菜室
１３冷凍室
１４氷温室
２０圧縮機
２１冷却器
２２送風機
２３、２８、３０冷気通路
２８ａ下降通路
２８ｂ上昇通路
２８ｃ断熱部材
２８ｆ隙間
３６断熱部材
４２部材
４２ａ開口部
４２ｆ延設部
５１照明灯
５３照明カバー
５４天井ダクト
６１、６２除霜用ヒータ
６５ダンパー
７０背面板
７０ｂ吐出部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator that delivers cold air into a storage room.
[0002]
[Prior art]
A partial side sectional view of a conventional refrigerator is shown in FIG. In the refrigerator 1, an inner box 2 b is arranged inside an outer box 2 a that covers the outside, and a gap between the outer box 2 a and the inner box 2 b is filled with a heat insulating material 2 c such as foamed polyurethane. The front surface of the refrigerator compartment 11 covered with the inner box 2 b can be opened and closed by a rotating heat insulating door 3.
[0003]
An ice greenhouse 14 as an isolation room is provided below the refrigerator compartment 11, and a vegetable compartment 12 is disposed below the ice greenhouse 14. The front of the vegetable compartment 12 can be opened and closed by a sliding heat insulating door 4. The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by partition plates 31 and 32 made of resin molded products. The partition plate 32 is provided with a through hole 32a.
[0004]
Behind the refrigerator compartment 11 and the ice greenhouse 14 is provided a cold air passage 28 through which cold air generated by a cooler (not shown) is sent and distributed by a blower (not shown). A member 42 facing the cold air passage 28 is provided on the back surface of the refrigerator compartment 11. A back plate 35 facing the cold air passage 28 is provided on the back surface of the ice greenhouse 14 via a heat insulating material 36.
[0005]
The cold air flows into the refrigerating chamber 11 through the openings 42 a and 36 a provided in the member 42 and the heat insulating material 36, and cools the inside of the refrigerating chamber 11. Then, the cold air descends due to its own weight, and forms an air flow that flows into the vegetable compartment 12 from the through hole 32a through the cold air passage 30. Thereby, the inside of the vegetable compartment 12 is cooled.
[0006]
The member 42 is made of a metal plate or the like, and transmits the cold heat generated by the cold air flowing through the cold air passage 28 to be discharged into the refrigerator compartment 11. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat released from the entire surface of the member 42. Further, while the cooler is stopped, the accumulated cold heat is discharged to keep the inside of the refrigerator compartment 11 cool.
[0007]
[Problems to be solved by the invention]
However, according to the above-described conventional refrigerator, the refrigerator compartment 11 is cooled by the cold heat released from the entire surface of the member 42. However, when the amount of cold air flowing through the cold air passage 28 increases, The temperature difference between the inside of the passage 28 is increased. Thereby, dew condensation occurs on the surface of the member 42 on the refrigerator compartment 11 side. As a result, there has been a problem that food stored in the refrigerator compartment 11 is quickly deteriorated by drying the refrigerator compartment 11.
[0008]
Moreover, since the pressure of the cold air sent into the cold air passage 28 by the blower fluctuates, if the amount of the cold air flowing through the cold air passage 28 is reduced in order to prevent condensation, the cold air may not flow. For this reason, there is a problem that the amount of cold heat released into the refrigerator compartment 11 varies and the temperature in the storage compartment becomes non-uniform.
[0009]
An object of the present invention is to provide a refrigerator that can achieve uniform temperature in a storage chamber and prevent condensation.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a refrigerator according to the present invention includes a storage room for storing stored items, a cooler for generating cold air flowing into the storage room, an ascending passage for rising cold air, and cold air passing through the ascending passage. A cooling passage that guides the cold air to the storage chamber, and a member that is disposed on the lowering passage side and that discharges cold heat from the cold air flowing through the lowering passage into the storage chamber. And a heat insulating member that extends the member facing the ascending passage and isolates the member and the ascending passage through a gap communicating with the descending passage .
[0011]
According to this configuration, the cool air generated by the cooler ascends the ascending passage and then descends the descending passage and flows into the storage chamber. Then, the cold heat generated by the cold air passing through the descending passage is transmitted to the heat conductive member having heat conductivity, and the cold heat is uniformly discharged from the entire surface of the member into the storage chamber.
[0012]
Further, the refrigerator of the present invention includes a storage chamber for storing stored items, a cooler for generating cold air flowing into the storage chamber, an ascending passage through which the cool air rises, and a down passage through which the cold air passes through the ascending passage. A cool air passage provided through the storage chamber and the partition, and disposed on the descending passage side and forming at least a part of the partition, A member for releasing cold heat from the cold air flowing through the storage chamber into the storage chamber, extending the member so as to face the ascending passage, and connecting the member and the ascending passage through a gap communicating with the descending passage. A heat insulating member for isolation is provided .
[0013]
According to this configuration, the cool air generated by the cooler ascends the ascending passage and then descends the descending passage and flows into the storage chamber. Then, the cold heat passing through the descending passage forms a partition wall with the storage chamber and is transmitted to a heat conductive member having thermal conductivity, and the cold heat is uniformly discharged from the entire surface of the member into the storage chamber.
[0014]
In addition, a discharge port for discharging cool air from the cool air passage into the storage chamber is provided at a lateral position on both the left and right sides of the member. The member forms a part of the inner wall of the storage chamber and is made of a heat conductive metal. Further, the cold air passage is characterized in that at least a part from the cooler to the rising passage isolated by the partition and the heat insulating member is formed using a heat insulating material. According to the present invention, in the refrigerator having the above-described configuration, the cooling passage is disposed behind the storage chamber, and an opening for discharging cool air to a lower portion of the descending passage disposed in a substantially center in the lateral direction of the storage chamber. It is characterized by providing. According to this configuration, the cold air passing through the descending passage flows into the storage chamber from the lower portion of the substantially central portion of the storage chamber in the left-right direction.
[0015]
Further, the present invention provides the refrigerator having the above-described configuration, wherein the ascending passage is disposed on both sides of the descending passage, and the discharge port for discharging cool air from the ascending passage into the storage chamber is provided with the ascending passage and the partition wall of the descending passage. The storage chamber is provided at substantially the center of the side wall. According to this configuration, the cool air rising in the rising passage disposed between the side wall of the storage chamber and the lowering passage flows into the storage chamber from the discharge port.
[0017]
Further, in the refrigerator having the above-described configuration, the refrigerator includes a ceiling duct into which cool air flows from an upper end of the rising passage in a ceiling portion of the storage chamber, and a plurality of ceiling discharge portions that discharge cool air toward the storage chamber It is characterized by being distributed on the left and right sides of the ceiling duct. According to this configuration, the cool air rising in the ascending passage provided on both sides of the descending passage flows into the descending passage and the ceiling duct. The cold air passing through the ceiling duct is dispersed from the ceiling discharge part to the left and right and flows into the storage chamber.
[0019]
Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the member and the heat insulating member are detachable.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same parts as those in the conventional example of FIG. FIG. 1 is a side sectional view showing a refrigerator according to an embodiment. In the refrigerator 1, an inner box 2 b is arranged inside an outer box 2 a that covers the outside, and a gap between the outer box 2 a and the inner box 2 b is filled with a heat insulating material 2 c such as foamed polyurethane. The inside of the refrigerator 1 is divided into the refrigerator compartment 11, the vegetable compartment 12, and the freezer compartment 13 in order from the top.
[0021]
The vegetable compartment 12 and the freezer compartment 13 are partitioned by a partition frame 17 made of a heat insulating material and a partition plate 19 made of a heat insulating material, and the freezer compartment 13 is further partitioned into an upper part and a lower part by a partition frame 18 made of a heat insulating material. . The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by a partition frame 16 made of a heat insulating material and partition plates 31 and 32 made of a resin molded product. The partition plate 32 is provided with a through hole 32a.
[0022]
An ice greenhouse 14, which is an isolation room partitioned by a partition plate 46, is provided at the lower part of the refrigerator compartment 11. The refrigerator compartment 11 is provided with a plurality of shelves 45. The front surface of the refrigerator compartment 11 can be opened and closed by a rotating heat insulating door 3. The upper part of the vegetable compartment 12, the freezer compartment 13, and the lower part of the freezer compartment 13 can be opened / closed by heat-insulating doors 4, 5, 6 with sliding front surfaces, respectively, and the storage containers 54, 55, 56 can be drawn out. ing.
[0023]
A compressor 20 is disposed at the rear of the freezer compartment 13. A condenser (not shown) is connected to the compressor 20 via a discharge pipe 20a, and a cooler 21 is connected via a suction pipe 20b. The condenser and the cooler 21 are connected via a capillary tube (not shown).
[0024]
Thus, a refrigeration cycle is configured, and the cooler 21 is cooled when the refrigeration cycle operation is performed. A defrost heater 62 that defrosts the cooler 21 is provided below the cooler 21. Reference numeral 64 denotes a drain receiving member.
[0025]
The cooler 21 is disposed in the cool air passage 23, and the lower portion of the cool air passage 23 is formed by an inner box 2b and an evaporative cover 33 made of a resin molded product. A blower 22 is disposed above the cooler 21 in the cool air passage 23. The cold air passage 23 communicates with the freezer compartment 13 through the inlets 13a and 13c provided in the back plate 33a and the outlet 13b provided in the outlet cover 33b.
[0026]
The cold air passage 23 communicates with a cold air passage 28 disposed above the blower 22 via a damper 65. The lower part of the cold air passage 28 is formed by a heat insulating member 36 fixed to the back plate 35 of the ice greenhouse 14 and the inner box 2b. The upper portion of the cold air passage 28 is formed by a member 42 that forms the inner wall of the refrigerator compartment 11 and a back plate 70 provided on the inner box 2b. The back plate 70 is formed integrally with the back plate 35 described above.
[0027]
When the front view of the refrigerator compartment 11 is shown in FIG. 2, the cool air passage 28 has a descending passage 28a disposed substantially at the center and an ascending passage 28b branched to both sides of the descending passage 28a. Ribs 28d serving as partitions of the descending passage 28a and the ascending passage 28b are formed integrally with the back plate 70.
[0028]
The lower passage 28a is closed at the bottom so that the cold air from the cold air passage 23 does not directly enter, and communicates with the ascending passage 28b through the communication hole 28g. An opening 42a that opens toward the refrigerator compartment 11 is provided at the lower end of the descending passage 28a. The cold air passing through the cold air passage 28 rises up the ascending passage 28b and is guided to the lower passage 28a, and descends the lower passage 28a and flows into the refrigerator compartment 11 from the opening 42a.
[0029]
The back plate 35 and the heat insulating member 36 are provided with openings 35a and 36a at the same position. Further, openings 35c and 36c (36c is not shown) are provided through a branch passage 28h that branches downward from the ascending passage 28b. The ice greenhouse 14 communicates with the cold air passage 28 through the openings 35a, 36a, 35c, and 36c.
[0030]
The member 42 is formed of a heat conductive member having a heat conductivity having a shape as shown in FIG. 4 (for example, an aluminum alloy, stainless steel, or the like having good workability and high rust prevention effect). This makes it possible to store cold and release cold. In addition, when the thickness of the said heat conductive member is thick, cold storage capacity goes up and intensity | strength also increases. When the thickness is small, the efficiency of releasing cold heat increases, which is advantageous for weight reduction. Therefore, a thin plate material or a thick plate material may be selected and provided at an appropriate place according to the purpose.
[0031]
The surface area can be increased by providing an uneven shape on the surface of the member 42 by pressing or the like. As a result, the amount of cold storage and the amount of released heat is increased, and the cooling efficiency can be improved. Furthermore, the intensity | strength of the member 42 can be reinforced by providing the recessed part or convex part which continues in a linear form.
[0032]
Detailed cross-sectional views of the upper and lower end portions of the member 42 are shown in FIGS. According to these drawings, the member 42 is locked by an upper mounting portion 71 provided on the back plate 70 and a lower mounting portion 72 provided on the back plate 35. When the lever portion 71a of the upper mounting portion 71 is pushed up with fingers, the engagement of the claw portion 71b is released.
[0033]
In this state, the member 42 can be attached and detached by tilting the upper part of the member 42 forward and pulling it upward, so that the member 42 is detachable. As a result, the cold air passage 28 and the member 42 can be easily cleaned on the cold air passage 28 side. The lower part of the member 42 is hermetically sealed with a sealing material 73 fixed to the heat insulating member 36.
[0034]
Moreover, you may comprise the lower end part of the member 42 as shown in FIG. That is, the locking portion 42 b is formed at the lower end of the member 42, and the opening 35 d is formed in the back plate 35. Then, the locking portion 42b and the opening 35d are engaged to lock the member 42. The opening 35d is covered and sealed with a heat insulating member 36. Thereby, the sealing material 73 can be omitted.
[0035]
FIG. 3 is a cross-sectional view of the upper part of the refrigerator compartment 11, and the member 42 is provided with an extending portion 42f extending to a portion facing the ascending passage 28b. A heat insulating member 28c is disposed on the surface of the extending portion 42f on the ascending passage 28b side through a gap 28f. When the member 42 is detached, the heat insulating member 28c can be removed.
[0036]
Cold heat from the cold air passing through the descending passage 28a is transmitted to the member 42, and most of the cold heat of the cold air passing through the upward passage 28b is not transmitted to the member 42 by the heat insulating member 28c. The extending portion 42f facing the ascending passage 28b is adapted to transmit cold heat by cold air entering the gap 28f from the descending passage 28a.
[0037]
The side wall 70f of the ascending passage 28b is formed by the back plate 70, and the side wall 70f is provided with a plurality of openings 70a. A wall surface portion 70 c that covers the outer periphery of the member 42 is formed on the back plate 70. A plurality of discharge portions 70b communicating with the opening 70a are recessed in the wall surface portion 70c. Therefore, the ascending passage 28b communicates with the refrigerating chamber 11 through the discharge portion 70b and the opening 70a so that the cool air can be discharged into the refrigerating chamber 11.
[0038]
In FIG. 2 described above, the wall surface portion 70c is formed in the vicinity of the same height as the shelf 45 placed on the placement portion 74, and food or the like placed on the shelf 45 (see FIG. 1) is placed in the discharge portion 70b. It is designed not to fall. The opening 70a has a slit shape so that the stored material does not fall into the ascending passage 28b. The back plate 70 is formed with ribs 70d that guide the cool air to the discharge part 70b.
[0039]
A ceiling duct 54 is formed on the ceiling portion of the refrigerator compartment 11 by an upper plate 43 made of a resin molded product and the inner box 2b. The ceiling ducts 54 are arranged side by side and communicate with the ascending passage 28b to guide the cold air. Then, a plurality of ceiling discharge portions 43 a provided in the front-rear direction of the upper surface plate 43 are dispersed left and right to discharge cool air.
[0040]
Since the cool air is diffused left and right before flowing into the ceiling duct 54 by the branched ascending passage 28b, the cool air is sufficiently discharged also from the ceiling discharge portion 43a provided near the back wall of the refrigerator compartment 11. It has become so. An illumination lamp 51 covered with a transparent illumination cover 53 is provided between the left and right ceiling ducts 54.
[0041]
In the refrigerator 1 having the above configuration, when the blower 22 is driven, the air in the freezer compartment 13 is guided to the cold air passage 23 from the outlet 13b. The air is cooled by exchanging heat with the cooler 21 and flows into the freezer compartment 13 from the inlet 13a. Thereby, the inside of the freezer compartment 13 is cooled.
[0042]
Further, the cold air that has exchanged heat with the cooler 21 flows through the cooling passage 28 via the damper 65. A part of the cold air flows into the ice greenhouse 14 from the openings 35a and 36a. Further, the cold air passing through the branch passage 28h branched from the ascending passage 28b flows into the ice greenhouse 14 from the openings 35c and 36c (36c is not shown). Thereby, the inside of the ice greenhouse 14 is cooled, for example to -1 degreeC. Since the cold air entering the branch passage 28h is lowered by its own weight, it is possible to prevent the cold air in the ice greenhouse 14 having a slightly high temperature from flowing backward from the opening 35c.
[0043]
The other cool air branches off the left and right rising passages 28b. The cold air passing through the ascending passage 28b is guided by the rib 70d and discharged from the discharge portion 70b into the refrigerator compartment 11. The cold air entering the descending passage 28a from the communication hole 28g and descending is discharged into the refrigerator compartment 11 from the opening 42a. The cold air entering the ceiling duct 54 from the ascending passage 28b is discharged from the ceiling discharge part 43a in a distributed manner to the left and right.
[0044]
Further, part of the cold heat generated by the cold air flowing through the descending passage 28 a is transmitted to the member 42. A small amount of cold air flows into the gap 28f. At this time, the extended portion 42f of the member 42 facing the heat insulating member 28c is transmitted with cold by the cold air passing through the gap 28f. And it is discharged | emitted as cold heat in the refrigerator compartment 11 from the whole surface of the member 42. FIG. Therefore, the inside of the refrigerator compartment 11 is efficiently and uniformly cooled by the cold heat from the member 42 and the cold air that is dispersed and discharged from the discharge portion 70b and the ceiling discharge portion 43a.
[0045]
The air in the refrigerator compartment 11 passes between the shelves 45 and the front of the shelves 45, circulates through the cold air passage 30 from below the ice greenhouse 14 through the opening 32 a, and flows into the front of the vegetable compartment 12. Furthermore, the inside of the vegetable compartment 12 is cooled through the lower side from the front surface of the storage container 54. Then, the cool air circulates from the outlet (not shown) through the duct (not shown) to the lower part of the cooler 21.
[0046]
The compressor 20 and the blower 22 are operated and stopped based on the detection result of the cold room temperature detection unit (not shown) that detects the temperature in the cold room 11, and the temperature of the cold room 11 and the vegetable room 12 is, for example, 3 ° C. To be maintained.
[0047]
According to this embodiment, part of the cold heat of the cold air passing through the descending passage 28 a and the gap 28 f conducts heat through the member 42 functioning as a heat conduction plate and is released from the entire surface of the member 42 into the refrigerator compartment 11. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat uniformly discharged from a wide area covering the descending passage 28a and the ascending passage 28b.
[0048]
At this time, since a large amount of cold heat is not transmitted to the member 42 from the cold air passing through the rising passage 28b by the heat insulating member 28c, the amount of cold heat transmitted to the member 42 when a large amount of cold air flows through the cold air passage 28 is limited, Condensation of the member 42 can be prevented. And the cold of desired temperature and flow volume can be distribute | circulated by changing the area and thickness of the heat insulation member 28c.
[0049]
In addition, when the cooling capacity rises when the temperature of the cold air passing through the cold air passage 28 is low or when the flow rate of the cold air is increased, the cooling of the member 42 by the cold air is moderated and the member 42 near the lower passage 28a is refrigerated. In order to prevent condensation on the chamber 11 side, a thin heat insulating member may be provided on the member 42 side of the descending passage 28a.
[0050]
Further, cold heat transmitted from the cold air passing through the ascending passage 28 b and passing through the descending passage 28 a is released from the member 42. For this reason, the cold air immediately after being sent to the blower 22 and entering the cold air passage 28 has a pulsating flow with its pressure fluctuating, but the cold air passing through the lower passage 28a through the communication hole 28g has a reduced pressure. It is rectified. Thereby, even when the amount of cold air is small, the amount of cold heat released into the refrigerator compartment 11 is stabilized, and the temperature in the storage compartment can be made uniform.
[0051]
Moreover, since the discharge part 70b and the ceiling discharge part 43a are provided with two or more by the back surface and upper surface of the refrigerator compartment 11, cold air disperse | distributes and flows into the refrigerator compartment 11. FIG. For this reason, the refrigerator compartment 11 is cooled uniformly and rapidly.
[0052]
Here, as shown in FIG. 5, the member 42 may be a cold storage member in which a jelly-like or liquid cold insulating material 42c is enclosed by packaging materials 42d and 42e. If it does in this way, the member 42 will be cold-stored more by the cold heat | fever of the cold air which distribute | circulates the inside of the cold passage 28, and it discharge | releases as cold heat according to the temperature distribution in the refrigerator compartment 11. FIG. Therefore, the refrigerator compartment 11 is cooled uniformly.
[0053]
Furthermore, the cool storage member can absorb heat and dissipate heat while the compressor 20 is stopped or the temperature of the cool air in the cool air passage 28 varies, so that the cool air temperature in the cool air passage 28 can be maintained. At this time, since the cold storage member forms the inner wall of the refrigerator compartment 11, the space of the refrigerator compartment 11 can be widened, and the space of the refrigerator 1 can be saved. More preferably, the packaging materials 42d and 42e are made of an aluminum alloy or stainless steel having thermal conductivity.
[0054]
【The invention's effect】
According to the present invention, cold heat from the cold air passing through the ascending passage is not transmitted to the member, and most of the heat is transmitted from the cold air passing through the descending passage. For this reason, the amount of cold heat transmitted to the member is limited by the temperature rise of the cold air generated from the ascending passage to the descending passage and partial discharge into the storage chamber. As a result, even when low temperature or a large amount of cold air is circulated through the cold air passage to improve the cooling capacity, the storage chamber is uniformly cooled by the cold heat released uniformly from the member, and the condensation of the member is prevented. Can be prevented. In addition, since the heat insulating member that extends the member facing the ascending passage and isolates the member and the ascending passage through a gap that communicates with the descending passage is provided, the heat generated by the small amount of cold air flowing through the descending passage is reduced. It can be discharged from a large area that is transmitted to the member and covers the ascending passage and the descending passage. Thereby, the temperature in the storage chamber can be made more uniform.
[0055]
Furthermore, the pressure of the cool air immediately after entering the cool air passage by sending out the blower becomes a pulsating flow, but the pressure is reduced until the cool air is discharged from the ascending passage through the descending passage into the storage chamber. It drops and becomes rectified. As a result, the amount of cold heat released into the storage chamber is stabilized, and the temperature in the storage chamber can be made uniform.
[0056]
Further, according to the present invention, the discharge port from which the cool air is discharged from the rising passage is provided at the substantially center of the descending passage, the partition wall of the rising passage, and the side wall of the storage chamber, which are arranged at the approximate center in the left-right direction. The storage chamber is uniformly cooled by the cold heat discharged from the descending passage to the substantially center in the left-right direction and the cold air discharged from the discharge port.
[0058]
Further, according to the present invention, since the ceiling discharge port that is distributed to the left and right is provided in the ceiling duct that communicates with the rising passage provided on both sides of the lowering passage, the cold air is distributed to the left and right before entering the ceiling duct. Yes. Therefore, even if the ceiling discharge port is provided in the vicinity of the back wall of the storage room, it can be discharged into the storage room, and the temperature can be made uniform in the depth direction of the storage room.
[0060]
Further, according to the present invention, since the member and the heat insulating member are detachable, the cold air passage and the cold air passage side of the member and the heat insulating member can be easily cleaned, and the cold air discharged into the storage chamber is kept clean. be able to.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a refrigerator according to an embodiment of the present invention.
FIG. 2 is a front view of the refrigerator compartment of the refrigerator according to the embodiment of the present invention.
FIG. 3 is a top sectional view of the refrigerator according to the embodiment of the present invention.
FIG. 4 is a perspective view showing members of the refrigerator according to the embodiment of the present invention.
FIG. 5 is a perspective view showing another member of the refrigerator according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view of a main part showing a method of attaching the upper end of the refrigerator member according to the embodiment of the present invention.
FIG. 7 is a cross-sectional view of an essential part showing a method for attaching a lower end of a refrigerator member according to an embodiment of the present invention.
FIG. 8 is a cross-sectional view of a main part showing another method for attaching the members of the refrigerator according to the embodiment of the present invention.
FIG. 9 is a front sectional view of a conventional refrigerator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Refrigerator 2a Outer box 2b Inner box 3, 4, 5, 6 Heat insulation door 11 Refrigeration room 12 Vegetable room 13 Freezing room 14 Ice greenhouse 20 Compressor 21 Cooler 22 Blowers 23, 28, 30 Cold air passage 28a Lowering passage 28b Ascending passage 28c Insulating member 28f Clearance 36 Insulating member 42 Member 42a Opening 42f Extending part 51 Illuminating lamp 53 Illuminating cover 54 Ceiling ducts 61, 62 Defrosting heater 65 Damper 70 Back plate 70b Discharge part

Claims

A storage chamber for storing stored items, a cooler for generating cold air flowing into the storage chamber, an ascending passage for rising cold air, and a lowering passage for cooling air passing through the ascending passage. A cool air passage that leads to the storage chamber; and a member that is disposed on the descending passage side and that releases cold heat from the cold air flowing through the descending passage into the storage chamber,
A refrigerator comprising: a heat insulating member extending the member facing the ascending passage and isolating the member and the ascending passage through a gap communicating with the descending passage.

A storage chamber for storing stored items, a cooler for generating cold air flowing into the storage chamber, an ascending passage for rising cold air, and a lowering passage for cooling air passing through the ascending passage. Cold air passage that is led to the storage chamber and provided through the storage chamber and the partition wall, and is arranged on the descending passage side and forms at least a part of the partition wall to cool the cold air flowing through the descending passage. A member that discharges into the storage chamber,
A refrigerator comprising: a heat insulating member extending the member facing the ascending passage and isolating the member and the ascending passage through a gap communicating with the descending passage.

The refrigerator according to claim 1 or 2 , wherein a discharge port for discharging cold air from the cold air passage into the storage chamber is provided at a lateral position on both left and right sides of the member.

The refrigerator according to any one of claims 1 to 3 , wherein the member forms a part of an inner wall of the storage chamber and is made of a heat conductive metal.

The at least one part from the said cooler to the said ascending passage isolated by the said partition and the said heat insulation member is formed in the said cold air | gas channel | path using the heat insulating material. Item 5. The refrigerator according to any one of Items 4 .

2. The cooling passage is disposed behind the storage chamber, and an opening for discharging cool air is provided at a lower portion of the descending passage that is disposed substantially at the center in the lateral direction of the storage chamber. The refrigerator according to claim 2 .

The ascending passage is arranged on both sides of the descending passage, and a discharge port for discharging cool air from the ascending passage into the storage chamber is formed at a substantially center between the ascending passage, the partition wall of the descending passage, and the side wall of the storage chamber. the refrigerator according to claim 1 or claim 2 or請 Motomeko 6, characterized in that provided.

The ceiling part of the storage room is provided with a ceiling duct into which cool air flows from the upper end of the rising passage, and a plurality of ceiling discharge parts for discharging cool air toward the storage room are distributed on the left and right sides of the ceiling duct. the refrigerator according to any one of claims 1 to 7, characterized in.

The refrigerator according to any one of claims 1 to 8 , wherein the member and the heat insulating member are detachable.