JP7460563B2 - refrigerator - Google Patents

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JP7460563B2
JP7460563B2 JP2021021704A JP2021021704A JP7460563B2 JP 7460563 B2 JP7460563 B2 JP 7460563B2 JP 2021021704 A JP2021021704 A JP 2021021704A JP 2021021704 A JP2021021704 A JP 2021021704A JP 7460563 B2 JP7460563 B2 JP 7460563B2
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insulation material
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heat insulating
refrigerator
inner box
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JP2022124119A (en
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奨一 加納
正康 津布久
浩俊 渡邊
貴志 内山
弘晃 安藤
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Hitachi Global Life Solutions Inc
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Hitachi Global Life Solutions Inc
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Priority to JP2021021704A priority Critical patent/JP7460563B2/en
Priority to CN202180058902.9A priority patent/CN116235012A/en
Priority to EP21925742.5A priority patent/EP4293304A1/en
Priority to PCT/JP2021/031317 priority patent/WO2022172494A1/en
Publication of JP2022124119A publication Critical patent/JP2022124119A/en
Priority to JP2024044528A priority patent/JP2024071459A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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Description

本発明は、冷蔵庫に関する。 The present invention relates to a refrigerator.

省スペース・大容量のニーズに応えるべく、冷蔵庫の壁厚を薄くし、内容積を拡大する冷蔵庫の技術が知られている。冷蔵庫の省エネ性能は、主に真空断熱材と発泡断熱材の2つの断熱材を併用することで成り立っている。そこで、昨今では、断熱性能の優れた真空断熱材のカバー率や厚さを向上させ、発泡断熱材の厚さを低減した冷蔵庫が提案されている。例えば、特許文献1には、背部断熱壁において発泡断熱材がない面積を、側部断熱壁において発泡断熱材がない面積よりも広くした冷蔵庫が開示されている(請求項1等)。 To meet the needs for space saving and large capacity, refrigerator technology is known that reduces the thickness of the refrigerator walls and increases the internal volume. The energy saving performance of refrigerators is mainly achieved by using two insulation materials in combination: vacuum insulation material and foam insulation material. Therefore, refrigerators have been proposed in recent years that improve the coverage rate and thickness of the vacuum insulation material, which has excellent insulation performance, and reduce the thickness of the foam insulation material. For example, Patent Document 1 discloses a refrigerator in which the area of the back insulation wall without foam insulation material is made larger than the area of the side insulation wall without foam insulation material (Claim 1, etc.).

特許第6023941号公報Patent No. 6023941

しかし、特許文献1など、発泡断熱材の充填量を少なくする冷蔵庫に関する従来の技術は、断熱箱体の背面のみを想定したものであり、断熱箱体の側面、天面、底面については想定されていない。そこで、本発明者らは、発泡断熱材が冷蔵庫の強度に与える影響が小さい部分を特定すれば、箱体のこれら部分であっても、発泡断熱材の充填量を低減できることに着目した。 However, conventional technologies related to refrigerators that reduce the amount of foam insulation filling, such as Patent Document 1, only consider the back surface of the insulated box, and do not consider the sides, top, or bottom surfaces of the insulated box. Therefore, the inventors realized that if the areas where the foam insulation has a small effect on the strength of the refrigerator are identified, the amount of foam insulation filling can be reduced even in these areas of the box.

前記課題に鑑み、本発明の冷蔵庫は、前方が開口した貯蔵室を形成し、内箱及び外箱の間の領域に発泡断熱材が発泡充填され、上下寸法が左右寸法より大きい箱体を備え、該箱体における左側面及び/又は右側面は、上下方向に亘って前記発泡断熱材が連続的に発泡充填された前端断熱材を前端に備え、周囲に比べて発泡断熱材の流動可能な厚みが小さい領域を備え、前記発泡断熱材よりも高い断熱性能の別の断熱材を備える。 In consideration of the above problem, the refrigerator of the present invention has a storage compartment that is open at the front, and the area between the inner box and the outer box is foam-filled with foam insulation, and the box body has a vertical dimension that is greater than the horizontal dimension, and the left side and/or right side of the box body has a front end insulation material at the front end in which the foam insulation material is continuously foam-filled in the vertical direction, has an area in which the thickness at which the foam insulation material can flow is smaller than the surrounding area, and is equipped with another insulation material with higher insulation performance than the foam insulation material.

冷蔵庫の外観を示す正面図。A front view showing the appearance of the refrigerator. 冷蔵庫における断熱箱体の構成を示す斜視図。FIG. 2 is a perspective view showing the configuration of a heat-insulating box in a refrigerator. 発泡断熱材の充填量ごとに、強度上必要な充填箇所を解析により示した図。A diagram illustrating, through analysis, the necessary filling locations for strength for each filling amount of foam insulation material. 冷蔵庫の内箱の背面斜視図。FIG. 冷蔵庫を上方から見た平面図。A plan view of the refrigerator seen from above. 図5のA-A断面矢視図。6 is a cross-sectional view taken along the line AA in FIG. 5 . 図5のB-B断面矢視図。FIG. 5 is a sectional view taken along line BB in FIG. 5; 図5のC-C断面矢視図。5A is a cross-sectional view taken along the line CC in FIG. 5; 図5のD-D断面矢視図。FIG. 5 is a sectional view taken along the line DD in FIG. 5; 冷蔵室の天井部を正面から見たときの図。A diagram of the ceiling of the refrigerator compartment viewed from the front. 冷蔵室の天井部の庫内灯付近を示す部分断面斜視図。FIG. 4 is a partial cross-sectional perspective view showing the vicinity of the interior light on the ceiling of the refrigerator compartment. 外箱、内箱および真空断熱材を除いて、冷蔵室の天井部を上方から見たときの斜視図。FIG. 2 is a perspective view of the ceiling of the refrigerator compartment viewed from above, excluding the outer box, inner box, and vacuum insulation material. 冷蔵室の天井部を前方から見たときの部分断面図。A partial cross-sectional view of the ceiling of the refrigerator compartment viewed from the front. 冷蔵室の天井部を上方から見たときの平面図に、真空断熱材と、庫内灯と、庫内灯用の配線と、を透かせて表示させたもの。A plan view of the ceiling of a refrigerator compartment viewed from above, showing the vacuum insulation material, the interior light, and the wiring for the interior light through the transparent view. 下段冷凍室と野菜室とを仕切る断熱仕切部の構成を示す斜視図。The perspective view which shows the structure of the heat insulation partition part which partitions off a lower freezer compartment and a vegetable compartment. 断熱仕切部を上方から見たときの平面図。FIG. 3 is a plan view of the heat-insulating partition viewed from above. 図16のA-A断面矢視図。17 is a cross-sectional view taken along the line AA in FIG. 16. 図16のB-B断面矢視図。17 is a cross-sectional view taken along the line B-B in FIG. 16 . 図16のC-C断面矢視図。FIG. 16 is a cross-sectional view taken along the line CC in FIG. 16; 図16のD-D断面矢視図。FIG. 16 is a sectional view taken along line DD in FIG. 16; 断熱仕切部を下方から見たときの斜視図。FIG. 4 is a perspective view of the insulating partition section as viewed from below. 断熱仕切部のうち上ケースを除いた状態で、上方から見たときの平面図。A plan view of the heat-insulating partition section, with the upper case removed, as viewed from above. 図22の破線部Fの部分拡大斜視図。FIG. 23 is a partially enlarged perspective view of the dashed line portion F in FIG. 22 . 実施例2における天井部の概略構成を示す図。FIG. 11 is a diagram showing a schematic configuration of a ceiling part in a second embodiment. 断熱構造体の概略の断面図。A schematic cross-sectional view of a heat insulating structure. 棚の強度を確保している様子を示すイメージ図。An illustration showing how the strength of the shelves is ensured.

以下、本発明の実施形態について、添付の図面を参照しつつ説明する。 Embodiments of the present invention will be described below with reference to the accompanying drawings.

実施例1に係る冷蔵庫に関し、添付の図面を参照しつつ具体的に説明する。図1は、冷蔵庫1の外観を示す正面図である。 The refrigerator according to the first embodiment will be described in detail with reference to the attached drawings. FIG. 1 is a front view showing the exterior of the refrigerator 1.

<冷蔵庫の基本構造>
図1に示すように、本実施例に係る冷蔵庫1は、上方から冷蔵室2、左右に並設された製氷室3と上段冷凍室4、下段冷凍室5、野菜室6の順番で貯蔵室を有している。冷蔵庫1は、それぞれの貯蔵室の開口を開閉するドアを備えている。これらのドアは、冷蔵室2の開口を開閉する、左右に分割された回転式の冷蔵室ドア2a、2bと、製氷室3、上段冷凍室4、下段冷凍室5、野菜室6の開口をそれぞれ開閉する引き出し式の製氷室ドア3a、上段冷凍室ドア4a、下段冷凍室ドア5a、野菜室ドア6aである。なお、本実施例では、6つのドアを有する冷蔵庫を例に挙げて説明するが、6ドアの冷蔵庫に限定されるものではない。引出式のドアにはそれぞれ、収納容器と、前後に延在するドア側レールが設けられており、冷蔵庫1の内箱8側のレールに例えば摺動可能である。
<Basic structure of a refrigerator>
As shown in FIG. 1, the refrigerator 1 according to the present embodiment has storage compartments arranged in order from above: a refrigerator compartment 2, an ice-making compartment 3 arranged side by side on the left and right, an upper freezer compartment 4, a lower freezer compartment 5, and a vegetable compartment 6. have. The refrigerator 1 includes doors that open and close the openings of each storage compartment. These doors are divided into left and right rotary refrigerator doors 2a and 2b that open and close the opening of the refrigerator compartment 2, and openings of the ice making compartment 3, upper freezer compartment 4, lower freezer compartment 5, and vegetable compartment 6. They are a pull-out ice making compartment door 3a, an upper freezer compartment door 4a, a lower freezer compartment door 5a, and a vegetable compartment door 6a, which can be opened and closed, respectively. In this embodiment, a refrigerator having six doors will be described as an example, but the present invention is not limited to a six-door refrigerator. Each of the drawer-type doors is provided with a storage container and a door-side rail extending back and forth, and is slidable, for example, on the rail on the inner box 8 side of the refrigerator 1.

冷蔵室2は、庫内を冷蔵温度帯の例えば平均的に4℃程度にした冷蔵貯蔵室である。製氷室3、上段冷凍室4および下段冷凍室5は、庫内を冷凍温度帯の例えば平均的に-18℃程度にした冷凍貯蔵室である。野菜室6は、庫内を冷蔵温度帯の例えば平均的に6℃程度にした冷蔵貯蔵室で、間接的な冷却により、食品の乾燥を抑えた冷蔵貯蔵室である。 Refrigerator compartment 2 is a refrigerated storage compartment whose interior is kept at a refrigerated temperature range, for example, at an average of about 4°C. Ice-making compartment 3, upper freezer compartment 4, and lower freezer compartment 5 are refrigerated storage compartments whose interior is kept at a freezing temperature range, for example, at an average of about -18°C. Vegetable compartment 6 is a refrigerated storage compartment whose interior is kept at a refrigerated temperature range, for example, at an average of about 6°C, and is a refrigerated storage compartment that prevents food from drying out by indirect cooling.

冷蔵室2の両側面に配された棚リブ13は、冷蔵庫1の前端から離間したところに前端が位置し、そこから後方に延在している。棚リブ13には、食品を載置可能な棚が載置され、本実施例では複数が上下に並んでいる。 The shelf ribs 13 arranged on both sides of the refrigerator compartment 2 have their front ends located at a distance from the front end of the refrigerator 1, and extend rearward from there. On the shelf ribs 13, shelves on which foods can be placed are placed, and in this embodiment, a plurality of shelves are arranged one above the other.

下段冷凍室5の後側には、各貯蔵室内を冷却する冷却器が配置されている。図示は省略するが、冷却器と、圧縮機と、凝縮器と、キャプラリーチューブと、は接続され、冷凍サイクルが構成される。そして、冷却器の上方には、冷却器にて冷却された冷気を循環させるための送風機が配置され、送風機の下流には貯蔵室内に冷気を吐出する吐出口が形成されている。なお、冷却器は複数あっても良く、配置は下段冷凍室5の後側に限定されるものではなく、冷蔵室2の後側に配置されてもよい。 A cooler that cools the inside of each storage compartment is disposed behind the lower freezer compartment 5. Although not shown in the figure, the cooler, compressor, condenser, and capillary tube are connected to form a refrigeration cycle. A blower is disposed above the cooler to circulate the cold air cooled by the cooler, and an outlet is formed downstream of the blower to discharge the cold air into the storage compartment. Note that there may be multiple coolers, and their location is not limited to the rear of the lower freezer compartment 5, but may be disposed behind the refrigerator compartment 2.

レール21は、引出式の扉に接続された扉側のレール(不図示)に接続し、扉を支持する。扉又は扉側レールには食品を収納可能な容器が取付けられ、扉とともに移動する。 The rail 21 is connected to a door-side rail (not shown) that is connected to the retractable door, and supports the door. A container capable of storing food is attached to the door or the door-side rail, and moves with the door.

<断熱箱体の基本構造>
図2は、本実施例の冷蔵庫1における断熱箱体の構成を示す斜視図である。図2に示すように、断熱箱体は、天面、底面、両側面および背面からなり、前面は開口した箱型形状をしている。また、断熱箱体は、金属製の外箱7(図2では不図示)と、合成樹脂製の内箱8と、を備え、外箱7と内箱8とによって形成される断熱箱体の内部の空間に、硬質ウレタンフォーム等の発泡断熱材9がいわゆる現場発泡で充填され、貯蔵室と外部とを断熱している。
<Basic structure of the insulated box>
Fig. 2 is a perspective view showing the configuration of the insulated box in the refrigerator 1 of this embodiment. As shown in Fig. 2, the insulated box has a box shape consisting of a top surface, a bottom surface, both side surfaces, and a back surface, and the front surface is open. The insulated box also includes a metal outer box 7 (not shown in Fig. 2) and a synthetic resin inner box 8, and the internal space of the insulated box formed by the outer box 7 and the inner box 8 is filled with foamed insulation material 9 such as rigid urethane foam by so-called foaming-in-place, thereby insulating the storage chamber from the outside.

外箱7は、薄い鋼板を門型に折り曲げて形成された天面板および左右の側面板と、別部材で構成された背面板と、別部材で構成された底面板と、によって箱状に構成されている。一方、内箱8は、合成樹脂板を成形することにより、箱状に形成されている。天面板および左右の側面板は別体でもよい。 The outer box 7 is configured in a box shape with a top panel and left and right side panels formed by bending a thin steel plate into a gate shape, a back panel made of a separate material, and a bottom panel made of a separate material. Meanwhile, the inner box 8 is formed in a box shape by molding a synthetic resin plate. The top panel and the left and right side panels may be separate pieces.

また、冷蔵室2と、製氷室3および上段冷凍室4とは、略水平な面として配された断熱仕切部10によって隔てられている。また、下段冷凍室5と野菜室6とは、略水平な面として配された断熱仕切部11によって隔てられている。これらの断熱仕切部は、異なる温度帯の貯蔵室を区画する部分に設けられ、冷凍温度帯室の冷気によって冷蔵温度帯室内が冷え過ぎないようにする役割を果たす。 Further, the refrigerator compartment 2, the ice making compartment 3, and the upper freezing compartment 4 are separated by a heat insulating partition 10 arranged as a substantially horizontal surface. Further, the lower freezer compartment 5 and the vegetable compartment 6 are separated by a heat insulating partition 11 arranged as a substantially horizontal surface. These heat-insulating partitions are provided at portions that partition storage chambers in different temperature zones, and serve to prevent the inside of the refrigerating temperature zone from becoming too cold due to the cold air in the freezing temperature zone.

さらに、外箱7と内箱8との間には、発泡断熱材9に加えて、発泡断熱材9よりも熱伝導率の低い真空断熱材12(図2では不図示)が実装されており、食品収納容積を低下させることなく断熱性能が高められている。ここで、真空断熱材12は、ガスバリア性を確保するため、グラスウール等の芯材が、例えばアルミニウム等の金属層で形成される外包材で包んで構成されている。真空断熱材12は、外箱7の内壁面、すなわち、天面板、側面板、背面板および底面板のそれぞれの内壁面に、両面テープやホットメルトなどの接着剤を真空断熱材12の一部または全面に用いてそれぞれ貼り付けられる。 Furthermore, in addition to the foam insulation material 9, a vacuum insulation material 12 (not shown in FIG. 2) having a lower thermal conductivity than the foam insulation material 9 is mounted between the outer box 7 and the inner box 8. , the insulation performance is improved without reducing the food storage capacity. Here, in order to ensure gas barrier properties, the vacuum heat insulating material 12 is constructed by wrapping a core material such as glass wool with an outer wrapping material formed of a metal layer such as aluminum. The vacuum insulation material 12 is made by attaching an adhesive such as double-sided tape or hot melt to a part of the vacuum insulation material 12 on the inner wall surface of the outer box 7, that is, on each of the inner wall surfaces of the top panel, side panel, back panel, and bottom panel. Or it can be used and pasted on the entire surface.

現場発泡した発泡断熱材9は、熱伝導率の点で真空断熱材12より劣るが、その接着力により内箱8と外箱7を一体化できるので、断熱箱体の強度を向上させるのに有用である。発泡断熱材9となるウレタン断熱材の現場発泡時の注入方法は、冷蔵庫1の背面が鉛直上方を向くようにうつ伏せ状態にし、冷蔵庫1の外箱7の背面に設けられた例えば4点の注入口を介して、内箱8と外箱7の間の空間に注入するものである。注入されたウレタン断熱材は、断熱箱体内の側面前端あたりに滴下して、ここから発泡が開始され、側面を駆け上がり、背面側へと回り込むようにして、充填し固化する。 Although the on-site foamed insulation material 9 is inferior to the vacuum insulation material 12 in terms of thermal conductivity, its adhesive strength allows the inner box 8 and the outer box 7 to be integrated, making it useful for improving the strength of the insulated box. The method of injecting the urethane insulation material that becomes the foamed insulation material 9 when foaming on-site is to place the refrigerator 1 face-down so that the back surface faces vertically upward, and inject the urethane insulation material into the space between the inner box 8 and the outer box 7 through, for example, four injection ports provided on the back surface of the outer box 7 of the refrigerator 1. The injected urethane insulation material is dripped around the front end of the side surface inside the insulated box, where it begins to foam, runs up the side surface, and wraps around to the back surface, filling and solidifying.

つまり、真空断熱材12と内箱8との間は、基本的に、発泡断熱材9が注入発泡され、内箱8と固着され冷蔵庫の強度が確保される。しかし、本実施例では、強度に影響の小さい部分については、発泡断熱材9を非充填又は少充填にした(部分ウレタンレス)。具体的には、本実施例では、部分ウレタンレスの全域あるいは全周のウレタン流動厚み(内箱8と真空断熱材12との隙間。流動可能厚み。)を例えば6mm未満と小さくした。これにより、真空断熱材12の寸法バラツキなどに起因した意図せぬウレタン非充填(ボイド)ではなく、敢えてウレタン非充填又は少充填の領域を設けることが可能となり、結果的に、冷蔵庫1全体としてのウレタン断熱材の注入量を低減できる。発泡断熱材9を充填させる流動厚みが厚い部分(例えば8mm以上の部分)と敢えてウレタン非充填又は少充填にする薄い部分との接続は、例えば内箱8をテーパ状に外箱7側に近接させて流動厚みが連続的に変化するようにしている。これにより、剛性の急激な変化により発生する、荷重による応力の集中を回避できる。また冷気の流れる場所では風路の圧力損失を低減できる。一方、例えば内箱8を階段状に接続すれば貯蔵室の内容積を最大化することができ、流動厚みが確保できるため接続部のウレタン未充填のリスクを削減できる。 In other words, the foam insulation material 9 is basically injected and foamed between the vacuum insulation material 12 and the inner box 8, and is fixed to the inner box 8 to ensure the strength of the refrigerator. However, in this embodiment, the foam insulation material 9 is not filled or is filled only lightly in the parts that have little effect on the strength (partial urethane-less). Specifically, in this embodiment, the urethane flow thickness (the gap between the inner box 8 and the vacuum insulation material 12. Flowable thickness.) of the entire area or entire periphery of the partial urethane-less area is made small, for example, less than 6 mm. This makes it possible to intentionally provide an area that is not filled or is filled only lightly with urethane, rather than an unintentional urethane-free area (void) due to dimensional variations in the vacuum insulation material 12, and as a result, the amount of urethane insulation material injected into the entire refrigerator 1 can be reduced. The connection between the part with a thick flow thickness (for example, a part of 8 mm or more) where the foam insulation material 9 is filled and the thin part where the urethane is not filled or is filled only lightly is made, for example, by bringing the inner box 8 closer to the outer box 7 in a tapered shape so that the flow thickness changes continuously. This makes it possible to avoid stress concentration caused by loads due to sudden changes in rigidity. It also reduces pressure loss in the air passages in places where cold air flows. On the other hand, for example, if the inner box 8 is connected in a stepped manner, the internal volume of the storage chamber can be maximized, and the flow thickness can be secured, reducing the risk of the urethane not being filled at the connection.

なお、外箱7と内箱8との間に発泡断熱材9とともに埋設されるものは真空断熱材12に限らず、発泡断熱材9よりも熱伝導率λが小さいものであればよい。例えば、各実施例に記載の真空断熱材12を、図25に示すような断熱構造体30と置き換えてもよい。断熱構造体30は、板厚0.5~2.0mmのステンレス鋼板やPCM鋼板、ガラス板等からなる第一の板材31aと第二の板材31bとの間に内部空間32ができるように重ね合わせたものである。第一の板材31aおよび第二の板材31bの外周を溶着や接着等で接合した接合部33を有し、内部空間32にはガラスやセラミック等の球状のスペーサ部材34を複数配置し、内部空間32の高さは2~5mm程度とする。第一の板材31aおよび第二の板材31bの何れか一方に設けられた排気口35から内部空間32を真空引きし、キャップ36で封止する。このように、断熱構造体30の内部空間32を真空雰囲気とすることで発泡断熱材9よりも熱伝導率λを小さくできる。 In addition, the material embedded between the outer box 7 and the inner box 8 together with the foam insulation material 9 is not limited to the vacuum insulation material 12, but may be any material having a smaller thermal conductivity λ than the foam insulation material 9. For example, the vacuum insulation material 12 described in each embodiment may be replaced with a heat insulation structure 30 as shown in FIG. 25. The heat insulation structure 30 is a structure in which a first plate material 31a and a second plate material 31b made of stainless steel plate, PCM steel plate, glass plate, etc. having a plate thickness of 0.5 to 2.0 mm are stacked so that an internal space 32 is formed between them. The first plate material 31a and the second plate material 31b have a joint 33 in which the outer periphery is joined by welding, adhesive, etc., and a plurality of spherical spacer members 34 made of glass, ceramic, etc. are arranged in the internal space 32, and the height of the internal space 32 is about 2 to 5 mm. The internal space 32 is evacuated from an exhaust port 35 provided in either the first plate material 31a or the second plate material 31b, and sealed with a cap 36. In this way, by making the internal space 32 of the thermal insulation structure 30 a vacuum atmosphere, the thermal conductivity λ can be made smaller than that of the foam insulation material 9.

<部分ウレタンレスの概要>
図3は、強度上必要な充填箇所を解析により示した図である。発泡断熱材9は、内箱8と外箱7、あるいは真空断熱材12などで構成される断熱空間に充填、固化し冷蔵庫の強度を確保するが、全ての空間で構造体として同様には寄与していない。冷蔵庫に求められる剛性に寄与しているウレタン部分を密度法による最適化手法にて求めた結果を図3に示す。冷蔵庫として成立する前提となるため、棚リブ13に載置された棚や引出式の貯蔵室容器を支持するレール21に荷重がかけられている条件を課してある。
<Outline of partial urethane-free>
Fig. 3 is a diagram showing the filling points necessary for strength, based on an analysis. The foam insulation material 9 is filled and solidified in the insulation space formed by the inner box 8 and the outer box 7, or the vacuum insulation material 12, etc., to ensure the strength of the refrigerator, but it does not contribute equally to all spaces as a structure. Fig. 3 shows the result of finding the urethane part that contributes to the rigidity required for the refrigerator by an optimization method using the density method. As a prerequisite for the refrigerator to function, a condition is imposed that a load is applied to the shelf placed on the shelf rib 13 and the rail 21 that supports the drawer-type storage container.

断熱空間全てに充填した結果を基準に、左から10%、30%、70%のウレタン注入を行った場合、最も効果的なウレタン注入空間を図示している。少ない充填量で求められる空間は、主に側面部の前端(開口部)と前後中央であり、この部分が剛性に対する寄与が大きいことが示されている。充填量を増加させるに従い、前側の開口部近傍から充填部分が後方に広がって側面中央に接続するが、側面後方や、底面、天面、背面側の空間には充填量が大きくならないと広がらず、この部分の断熱空間ではウレタンの剛性に対する寄与が小さいことが示されている。側面中央であっても、最上段の棚リブ13より上方や、最下段のレール21より下方もまた、比較的寄与が小さいことが看取される。 Based on the result of filling the entire insulation space, the most effective urethane injection space is shown when 10%, 30%, and 70% urethane is injected from the left. The space required for small filling amounts is mainly the front end (opening) of the side part and the center of the front and back, and it is shown that this part contributes greatly to rigidity. As the filling amount is increased, the filling part spreads rearward from near the front opening and connects to the center of the side, but it does not spread to the rear of the side, bottom, top, and back unless the filling amount is large, and it is shown that the contribution of urethane to rigidity is small in the insulation space of these parts. It can be seen that even in the center of the side, the area above the top shelf rib 13 and below the bottom rail 21 also have a relatively small contribution.

側面前端が重要であるという結果は、冷蔵庫1が略直方体形状であり前面に開口部があることから、開口した面を形成する辺の特に長辺部分での剛性の確保が必要なためである。相対的に短辺側(天面や底面の前端)の必要性は低い。また、回転式ドアを支持するヒンジ部22を備えた場合、ヒンジ部22近傍にもウレタンを充填し剛性を高める必要がある。よって側面前端は上下全域にウレタンを充填するのが好ましい。 The reason why the front edge of the side surface is important is that since the refrigerator 1 has a substantially rectangular parallelepiped shape and has an opening at the front, it is necessary to ensure rigidity especially at the long side of the sides forming the open surface. . There is relatively little need for the short sides (the front end of the top or bottom). Further, when the hinge portion 22 that supports the revolving door is provided, it is necessary to fill the vicinity of the hinge portion 22 with urethane to increase the rigidity. Therefore, it is preferable to fill the entire upper and lower parts of the front end of the side surface with urethane.

前面の開口部、すなわち断熱箱体の前端の、特に上下に延在する長辺に続いて、側面の前後中央側で、棚リブ13やレール21の設けられているところもウレタンの寄与が大きく、これらの部分が、強度上、重要であるという結果は、側面に配された、棚や容器に置かれる食品の荷重を受ける棚リブ13やレール21近傍の剛性が食品荷重の支持に必要なためである。この点、棚を支持する部分が他にある場合は、この部分はウレタンの量を削減できる。例えば棚を支持する部分が背面の或る場所に在る場合は、側面に代えて背面の棚を支持する部分にウレタンを多く充填させることで代えることができる。 The opening on the front, that is, the front end of the insulated box, especially the long side extending up and down, followed by the center front and rear of the side where the shelf ribs 13 and rails 21 are provided, also make a large contribution of urethane, and the result that these parts are important in terms of strength is that the rigidity near the shelf ribs 13 and rails 21 arranged on the side, which support the load of food placed on shelves or containers, is necessary to support the load of food. In this regard, if there is another part that supports the shelf, the amount of urethane in this part can be reduced. For example, if the part that supports the shelf is located somewhere on the back, it can be replaced by filling more urethane in the part that supports the shelf on the back instead of the side.

この解析結果に基づき、本実施例の断熱箱体(冷蔵庫1)の側面については、断熱箱体の前端、棚リブ13、レール21、の発泡断熱材9の流動厚みを大きくした。具体的には、側面前端には、冷蔵庫1の上下全域に亘って流動厚みを大きくもって充填された発泡断熱材9(前端断熱材91)を設けた。図3には前端断熱材の位置イメージとして符号91’を付している。これにより、強度上重要な前端側は発泡断熱材9を充填しつつ、側面の後端側への発泡断熱材9の充填を省略することができる。そして、側面について、前端から所定距離後方の位置までを前端側(開口部側)と呼び、ここから後方にかけてを後端側と呼ぶことにすると、後端側よりも前端側の流動厚みが全体として大きいようにした。前端と後端の境目は、側面の上下位置で異なり得るが、例えば、前端断熱材91の後端又はこれより後方である。 Based on the results of this analysis, the flow thickness of the foamed heat insulating material 9 at the front end of the heat insulating box, the shelf ribs 13, and the rails 21 was increased on the side surfaces of the heat insulating box (refrigerator 1) of this example. Specifically, a foamed heat insulating material 9 (front end insulating material 91) filled with a large flow thickness over the entire upper and lower regions of the refrigerator 1 was provided at the front end of the side surface. In FIG. 3, a reference numeral 91' is given as an image of the position of the front end heat insulating material. This makes it possible to fill the front end side, which is important in terms of strength, with the foam heat insulating material 9, while filling the rear end side of the side surface with the foam heat insulating material 9 can be omitted. Regarding the side surfaces, if we call the area from the front end to a position a predetermined distance behind the front end side (opening side) and the area from here to the rear end the rear end side, the overall flow thickness on the front end side is greater than that on the rear end side. I made it as large as possible. The boundary between the front end and the rear end may be different depending on the vertical position of the side surface, but is, for example, at the rear end of the front end insulating material 91 or behind this.

具体的に、図2の左側面に例示するように、側面のうち、最上段の棚リブ13よりも上方の一部の領域81、最下段のレール21よりも下方の一部の領域84は、本実施例の冷蔵庫1において、流動厚みを小さくして発泡断熱材9を非充填又は少充填とした。その他、最上段の棚リブ13から最下段のレール21までの上下範囲であって前端断熱材91から棚リブ13又はレール21までの前後範囲の領域82、棚リブ13又はレール21で上下が挟まれた領域83、も、流動厚みを小さくして発泡断熱材9を非充填又は少充填とし得る。なお、領域83の前端は、図2では棚リブ13又はレール21の前後中央より後方にして描いているが、棚リブ13又はレール21の前端まで拡げてもよい。 Specifically, as illustrated on the left side of FIG. 2, a part of the area 81 above the uppermost shelf rib 13 and a part of the area 84 below the lowermost rail 21 of the side surface are In the refrigerator 1 of the present example, the flow thickness was made small so that the foamed heat insulating material 9 was not filled or filled with a small amount. In addition, there is an area 82 that is the vertical range from the top shelf rib 13 to the bottom rail 21 and the front and rear range from the front end insulation material 91 to the shelf rib 13 or rail 21, and the area 82 where the top and bottom are sandwiched between the shelf rib 13 or the rail 21. The flow thickness of the region 83 can also be reduced so that the foamed heat insulating material 9 is not filled or filled with a small amount. Although the front end of the region 83 is illustrated in FIG. 2 as being rearward from the front-rear center of the shelf rib 13 or the rail 21, it may extend to the front end of the shelf rib 13 or the rail 21.

前端側と後端側の境目としては、例えば、本実施例のように棚リブ13/レール21が設けられている冷蔵庫1の場合は、次のように考えることができる。 The boundary between the front end and the rear end can be considered as follows, for example, in the case of a refrigerator 1 having shelf ribs 13/rails 21 as in this embodiment.

第一に、棚リブ13/レール21が設けられている上下位置については、棚リブ13/レール21の前端よりも前や、棚リブ13/レール21の前後寸法中央にすることができる。棚リブ13及び/レール21の前端よりも前とすると、強度に影響の小さいところ(側面前端、棚リブ13、及びレール21以外のところ。)の流動厚みを小さくできる点で好ましいが、冷蔵庫1の背面の注入口からウレタン原液を注入する現場発泡方式だと、側面前端から棚リブ13/レール21への発泡経路を塞ぐことになりやすく、棚リブ13/レール21にボイドが発生しやすい。これに鑑みて本実施例では、領域82の流動厚みは、前端断熱材と同程度に大きくしている。 First, the vertical position where the shelf rib 13/rail 21 is provided can be in front of the front end of the shelf rib 13/rail 21 or in the center of the front-to-rear dimension of the shelf rib 13/rail 21. If it is in front of the front end of the shelf rib 13 and/rail 21, it is preferable because the flow thickness in the areas that have little effect on strength (areas other than the front end of the side, shelf rib 13, and rail 21) can be reduced. However, in the on-site foaming method in which urethane concentrate is injected from an injection port on the back of the refrigerator 1, the foaming path from the front end of the side to the shelf rib 13/rail 21 is likely to be blocked, and voids are likely to occur in the shelf rib 13/rail 21. In consideration of this, in this embodiment, the flow thickness of region 82 is made large to the same extent as the front end insulation material.

一方、棚リブ13/レール21の前後寸法中央を境目とすると、これより前側においてウレタン充填量を低減できないが、強度への影響が大きい棚リブ13/レール21にも、比較的発泡断熱材9を充填させやすい。このため、例えば領域83の流動厚みを小さくしてもよい。 On the other hand, if the center of the front and back dimensions of the shelf ribs 13/rails 21 is the boundary, the amount of urethane filling cannot be reduced in front of this, but the shelf ribs 13/rails 21, which have a large effect on strength, are also covered with relatively foamed heat insulating material 9. Easy to fill. For this reason, for example, the flow thickness of the region 83 may be reduced.

第二に、最上段の棚リブ13よりも上側/最下段のレール21よりも下側の上下範囲については、上述の前端断熱材の後端又はこれより後方とすることができる。本実施例では、最上段の棚リブ13よりも上側については、前端断熱材91の後端から側面略後端まで流動厚みを小さくした領域81を設けている。領域81の後端位置は特に制限されない。また、最下段のレール21よりも下側については、前端断熱材の後端近傍に、流動厚みを小さくした矩形状の領域84を設けている。領域84の後端は、図2の図示よりも後方にしてもよい。 Second, the vertical range above the shelf rib 13 at the top/below the rail 21 at the bottom can be at the rear end of the above-mentioned front end insulation material or rearward therefrom. In this embodiment, above the uppermost shelf rib 13, a region 81 with a reduced flow thickness is provided from the rear end of the front end heat insulating material 91 to substantially the rear end of the side surface. The position of the rear end of the region 81 is not particularly limited. Further, below the lowest rail 21, a rectangular region 84 with a reduced flow thickness is provided near the rear end of the front end insulation material. The rear end of region 84 may be further rearward than shown in FIG.

なお、領域81-84は、側面の正面視において、真空断熱材12に重なっていることができ、かつ、真空断熱材12の縁よりも内側に位置すると好ましい。 Note that the regions 81 to 84 can overlap the vacuum heat insulating material 12 when viewed from the front side, and are preferably located inside the edge of the vacuum heat insulating material 12.

次に、前端側と後端側の境目としては、棚リブ13及びレール21が設けられていない冷蔵庫の場合は、例えば前端から内箱背面までの前後寸法の1/3又は1/2の位置とすることができる。 Next, in the case of a refrigerator without shelf ribs 13 and rails 21, the boundary between the front end side and the rear end side is, for example, 1/3 or 1/2 of the front-to-back dimension from the front end to the back of the inner box. It can be done.

このように、冷蔵庫1の側面について、発泡断熱材9の流動厚みを大きくして充填した領域(例えば、前端断熱材91を設けた領域)と、流動厚みを小さくして非充填にした領域又は少充填にした領域との和に対する、流動厚みを大きくして充填した領域の割合は、側面前端側の方が側面後端側よりも高い。図2中、左側面について、領域81-84それぞれは、流動厚みを小さくすることができ、その余の領域は流動厚みを大きくする。本実施例では、領域81,84については流動厚みを小さくしており、その余の領域は流動厚みを大きくしている。右側面は、左側面と同様に構成することができる。 In this way, the ratio of the area filled with the foam insulation 9 with a larger flow thickness to the sum of the areas filled with the foam insulation 9 with a larger flow thickness (for example, the area where the front end insulation 91 is provided) and the areas filled with the foam insulation 9 with a smaller flow thickness and not filled or filled lightly is higher on the front end side of the side than on the rear end side of the side. In FIG. 2, on the left side, the flow thickness can be reduced in each of areas 81-84, and the flow thickness is increased in the remaining areas. In this embodiment, the flow thickness is reduced in areas 81 and 84, and the flow thickness is increased in the remaining areas. The right side can be configured in the same way as the left side.

このように、冷蔵庫1の側面は、前端断熱材91が設けられている他、棚リブ13やレール21の投影面内もウレタン流動厚みを大きくとって発泡断熱材9(食品支持断熱材)が充填されている。棚リブ13とレール21の投影面に少なくとも発泡断熱材9を充填すれば食品荷重に対する重要なところは確保できる。 In this way, the side of the refrigerator 1 is provided with front end insulation 91, and the projected surfaces of the shelf ribs 13 and rails 21 are also filled with foam insulation 9 (food support insulation) with a large urethane flow thickness. By filling at least the projected surfaces of the shelf ribs 13 and rails 21 with foam insulation 9, the important areas against food loads can be secured.

食品支持断熱材を現場発泡するには、例えば、最上段の棚リブ13から最下段のレール21に亘る範囲の全域のウレタン流動厚みを大きくとって発泡断熱材9が充填されるようにすることもできるし、領域83のように棚リブ13やレール21に上下を挟まれた領域の流動厚みを小さくして発泡断熱材を非充填又は少充填にしてもよい。本実施例では前者を採用している。後者の場合、食品支持断熱材がいわば虫食い状態になる。 In order to foam the food support insulation material in-situ, for example, the thickness of the urethane flow over the entire range from the uppermost shelf rib 13 to the lowermost rail 21 is increased so that the foamed insulation material 9 is filled. Alternatively, the flow thickness of the region sandwiched between the shelf ribs 13 and the rails 21 on the upper and lower sides, such as the region 83, may be reduced so that the foamed heat insulating material is not filled or filled with a small amount. In this embodiment, the former is adopted. In the latter case, the food support insulation material becomes worm-eaten.

冷蔵庫1の側面の前後方向については、上述の前端断熱材と食品支持断熱材との間には、これらを繋ぐように発泡断熱材9が充填されていてもよいし、流動厚みを小さくとって(例えば領域82の一部又は全部の流動厚みを小さくして)非充填又は少充填にしてもよい。前端断熱材91と食品支持断熱材との間(例えば領域82)に発泡断熱材9を充填すると、現場発泡の場合は食品支持断熱材を充填するのに容易であり、発泡断熱材9を非充填又は少充填にすると、冷蔵庫1の強度(剛性)への影響を抑えつつウレタン量を低減できる。領域82の一部の流動厚みを小さくする場合、上下に複数離間させて流動厚みが小さい領域を設けると、流動厚みが大きい領域も確保されるため、ここを発泡断熱材9が流動しやすいから、後側にむかって充填されやすい。すなわち、食品支持断熱材となるべき領域のボイドの発生を抑制できる点で好ましい。 Regarding the longitudinal direction of the side surface of the refrigerator 1, a foamed insulation material 9 may be filled between the above-mentioned front end insulation material and the food support insulation material so as to connect them, or a foamed insulation material 9 may be filled with a small fluid thickness. The region 82 may be unfilled or lightly filled (for example, by reducing the flow thickness of part or all of the region 82). Filling the foam insulation 9 between the front end insulation 91 and the food support insulation (for example, region 82) makes it easier to fill the food support insulation in the case of foaming in place, and it is easier to fill the foam insulation 9 with the non-foam insulation 9. When the refrigerator 1 is filled or filled with a small amount, the amount of urethane can be reduced while suppressing the influence on the strength (rigidity) of the refrigerator 1. When reducing the flow thickness of a part of the region 82, if a plurality of regions with a small flow thickness are provided vertically and spaced apart, a region with a large flow thickness is also secured, so the foamed heat insulating material 9 can easily flow there. , tend to fill toward the rear. That is, it is preferable in that it is possible to suppress the generation of voids in a region that should serve as a food support heat insulating material.

なお、充填固化された発泡断熱材9より高い剛性を有する別部品を、食品支持断熱材となるべき領域に取付けて補強すれば、食品支持断熱材となるべき領域に発泡充填する必要性がなくなる又は低減されるため、領域82のような前端断熱材と食品支持断熱材との間全域の流動厚みや、領域83をさらに広げて、棚リブ13やレール21に重なる領域全域の流動厚みも小さくすることができる。棚リブ13やレール21はあくまで食品荷重の支持を考慮した場合に重要であって、内箱及び外箱の構造体としての強度には、前端断熱材が重要であり、食品荷重の支持は発泡断熱材9でなく補強にて行うことが許容される。図26は、内箱8と真空断熱材12との間に樹脂部品または金属部品の補強23を設けて棚の強度を確保している様子を示すイメージ図である。 If a separate part having higher rigidity than the filled and solidified foam insulation 9 is attached to the area to be the food-support insulation to reinforce it, the need for foam filling in the area to be the food-support insulation is eliminated or reduced, so the flow thickness of the entire area between the front end insulation and the food-support insulation, such as area 82, and the flow thickness of the entire area overlapping the shelf rib 13 and rail 21 can be reduced by further expanding area 83. The shelf rib 13 and rail 21 are important only when considering the support of the food load, and the front end insulation is important for the strength of the inner box and outer box as a structure, and it is acceptable to support the food load with reinforcement rather than foam insulation 9. Figure 26 is an image diagram showing how the strength of the shelf is ensured by providing reinforcement 23 made of resin or metal parts between the inner box 8 and the vacuum insulation 12.

天面や底面について詳細は後述するが、上述のように前端の方が強度への寄与が大きいことから、流動厚みは前端側の方が後端側よりも大きくなるようにしている。本実施例の天面及び底面は、棚リブ及びレールが設けられていないため、前端から冷蔵庫1の前後寸法の例えば1/3又は1/2の位置を境目とすることができる。天面及び/又は底面についても前端には発泡断熱材9が充填されることができ、この場合、側面の前端断熱材91と連続していることができる。本実施例では天面及び底面の前端にも発泡断熱材9が充填されており、断熱箱体の前端全域、すなわち矩形状の領域は、流動厚みが大きい。 The top and bottom surfaces will be described in detail later, but as mentioned above, since the front end contributes more to strength, the flow thickness is made larger at the front end than at the rear end. In this embodiment, the top and bottom surfaces are not provided with shelf ribs or rails, so the boundary can be, for example, 1/3 or 1/2 of the front-to-rear dimension of the refrigerator 1 from the front end. The front ends of the top and/or bottom surfaces can also be filled with foam insulation material 9, and in this case, it can be continuous with the front end insulation material 91 on the side surface. In this embodiment, the front ends of the top and bottom surfaces are also filled with foam insulation material 9, and the entire front end of the insulated box, i.e., the rectangular area, has a large flow thickness.

ウレタン流動厚みを小さくとる方法としては、例えば、内箱8を外箱7側に凹ませることで実現できる。こうすると貯蔵室の内容積を拡張できる。冷蔵庫1の断熱性能は、発泡断熱材9よりもはるかに真空断熱材12が寄与するため、内容積の拡張やウレタン量の低減という観点からは、流動厚みを小さくとる領域では、発泡断熱材9が非充填となる程度まで流動厚みを小さくするのが好ましい。すなわち、真空断熱材12が設けられている領域の流動厚み(外箱7と内箱8との間の領域で真空断熱材12等の構造物がない距離)を小さくする場合、真空断熱材12が内箱8に取付けられているとき、流動厚みとしての真空断熱材12と外箱7間の距離は、例えば6mm以下、好ましくは3mm以下にすることができる。また、真空断熱材12が外箱7に取付けられているとき、真空断熱材12と内箱8間の距離は、やはり同様にすることができる。一方、流動厚みを大きくとる領域では、流動厚みとしての外箱7と内箱8との間の領域で構造物がない距離は、例えば8mm以上、10mm以上、12mm以上又は15mm以上とすることができる。また、前端断熱材91と略同一の流動厚みにしてもよい。 For example, the inner box 8 can be recessed toward the outer box 7 to reduce the urethane flow thickness. This allows the internal volume of the storage compartment to be expanded. Since the vacuum insulation material 12 contributes much more to the insulation performance of the refrigerator 1 than the foam insulation material 9, from the viewpoint of expanding the internal volume and reducing the amount of urethane, it is preferable to reduce the flow thickness to the extent that the foam insulation material 9 is not filled in the area where the flow thickness is small. In other words, when reducing the flow thickness of the area where the vacuum insulation material 12 is provided (the distance between the outer box 7 and the inner box 8 where there are no structures such as the vacuum insulation material 12), when the vacuum insulation material 12 is attached to the inner box 8, the distance between the vacuum insulation material 12 and the outer box 7 as the flow thickness can be, for example, 6 mm or less, preferably 3 mm or less. Also, when the vacuum insulation material 12 is attached to the outer box 7, the distance between the vacuum insulation material 12 and the inner box 8 can be the same. On the other hand, in areas where the flow thickness is large, the distance between the outer box 7 and the inner box 8 where there are no structures can be, for example, 8 mm or more, 10 mm or more, 12 mm or more, or 15 mm or more. It may also be set to approximately the same flow thickness as the front end insulation material 91.

なお、ウレタン重量の削減という観点からは、流動厚みを低減させる手段としては、内箱8と外箱7との間に何らかの別部品を配することで実現してもよい。また、例えば非充填又は少充填の領域を何らかの図形状にする場合、図形の中身の流動厚みを小さくする必要は必ずしもなく、図形の縁全体(すなわち、閉曲線)のみ、流動厚みを小さくしてもよい。この場合、内容積拡張の効果は低減されるもののウレタン量低減は実現される。 Note that from the viewpoint of reducing the weight of urethane, the flow thickness may be reduced by disposing some other part between the inner box 8 and the outer box 7. Also, for example, when making a non-filled or lightly filled area into some kind of shape, it is not necessarily necessary to reduce the flow thickness of the content of the shape, and it is possible to reduce the flow thickness only for the entire edge of the shape (i.e., a closed curve). good. In this case, although the effect of expanding the internal volume is reduced, the amount of urethane can be reduced.

その他、冷蔵庫1の天面や底面、背面については、真空断熱材12の支持や保護を考慮して発泡断熱材9の充填量を低減している。この点は後述する。 In addition, regarding the top surface, bottom surface, and back surface of the refrigerator 1, the filling amount of the foamed heat insulating material 9 is reduced in consideration of supporting and protecting the vacuum heat insulating material 12. This point will be discussed later.

<部分ウレタンレスの詳細>
次に、本実施例に係る冷蔵庫1における断熱箱体の各部の具体的な構造について説明する。図4は、冷蔵庫1の内箱8の背面斜視図であり、図5は、冷蔵庫1を上方から見た平面図(ただし、真空断熱材は透視したもの)である。また、図6は、図5のA-A断面矢視図であり、図7は、図5のB-B断面矢視図であり、図8は、図5のC-C断面矢視図であり、図9は、図5のD-D断面矢視図である。
<Details of partial urethane-free>
Next, the specific structure of each part of the insulated box of the refrigerator 1 according to this embodiment will be described. Fig. 4 is a rear perspective view of the inner box 8 of the refrigerator 1, and Fig. 5 is a plan view of the refrigerator 1 as seen from above (however, the vacuum insulation material is seen through). Fig. 6 is a cross-sectional view taken along the line A-A in Fig. 5, Fig. 7 is a cross-sectional view taken along the line B-B in Fig. 5, Fig. 8 is a cross-sectional view taken along the line C-C in Fig. 5, and Fig. 9 is a cross-sectional view taken along the line D-D in Fig. 5.

≪天井部≫
まず、断熱箱体の天面(天井部)の構造に関し、説明する。天井部の真空断熱材12の前側および後側には、図6に示すように、発泡断熱材9が連続的に充填されている。ここで、真空断熱材12の下面と内箱8との間については、前端から庫内灯14に跨る前側領域と、後端から角部20(背面から天面へ繋がる後方上側の傾斜部)終端に跨る後側領域と、にのみ充填され、中央領域(前側領域と後側領域との間)には、発泡断熱材9が充填されていない。
<Ceiling>
First, the structure of the top surface (ceiling portion) of the insulated box will be described. The front and rear sides of the vacuum insulation material 12 in the ceiling portion are continuously filled with foam insulation material 9 as shown in Fig. 6. Here, between the bottom surface of the vacuum insulation material 12 and the inner box 8, the foam insulation material 9 is filled only in the front region from the front end to the interior light 14 and the rear region from the rear end to the end of the corner portion 20 (the rear upper inclined portion that connects the back surface to the top surface), and the central region (between the front region and the rear region) is not filled with the foam insulation material 9.

一方、天井部の真空断熱材12の左側および右側にも、図7~図9に示すように、発泡断熱材9が連続的に充填されている。ここで、真空断熱材12の下面と内箱8との間については、図7に示すように、前側領域では、左端から右端に亘って発泡断熱材9が連続的に充填されているものの、図8および図9に示すように、中央領域では、左端から右端まで発泡断熱材9が充填されていない。 On the other hand, foam insulation material 9 is continuously filled on the left and right sides of the vacuum insulation material 12 in the ceiling, as shown in Figures 7 to 9. Here, in the space between the underside of the vacuum insulation material 12 and the inner box 8, foam insulation material 9 is continuously filled from the left end to the right end in the front region as shown in Figure 7, but foam insulation material 9 is not filled from the left end to the right end in the central region as shown in Figures 8 and 9.

このように、天井部の真空断熱材12の鉛直投影下方のうち中央領域(領域85)を部分ウレタンレスとすることで、ウレタン断熱材の注入量を低減できる。また、部分ウレタンレスとしても、天井部の真空断熱材12の周囲(前後左右の側面)については発泡断熱材9が存在し、特に、前側領域と後側領域では、発泡断熱材9が真空断熱材12の端部を下面から側面にかけて咥え込むように支持しているため、真空断熱材12の落下やヒートブリッジが防止される。同時に、ウレタンレス近傍に配置した庫内等14の周囲には少なくともウレタン断熱材が充填されていることで庫内灯14に関わる部品の固定強度も確保することができる。 In this way, by making the central region (region 85) below the vertical projection of the vacuum insulation material 12 in the ceiling partially urethane-free, the amount of urethane insulation material injected can be reduced. Even though it is partially urethane-free, the foam insulation material 9 is present around the vacuum insulation material 12 in the ceiling (front, back, left and right sides), and in particular in the front and rear regions, the foam insulation material 9 supports the end of the vacuum insulation material 12 by gripping it from the bottom to the sides, preventing the vacuum insulation material 12 from falling off and preventing heat bridges. At the same time, the fixing strength of the parts related to the interior light 14 can be ensured by filling at least the urethane insulation around the interior 14 located near the urethane-free area.

なお、真空断熱材12の左右領域において、発泡断熱材9にて咥え込むように支持をしても、同様の効果を得られるため、前側領域と後側領域の咥え込みに限られるものではない。 Note that the same effect can be obtained even if the left and right regions of the vacuum insulation material 12 are held in place by the foamed insulation material 9, so that the support is limited to the front and back areas. isn't it.

天井部の部分ウレタンレス領域(領域85)は、本実施例のように例えば、真空断熱材12の投影面内であって、真空断熱材12の縁よりも内側に設けることができる。
また、図9に示すように、内箱8の天面に配された真空断熱材12の幅寸法は、内箱8の天面の幅寸法よりも小さい。従って、内箱8の天面の左右コーナー部8aと真空断熱材12の左端および右端との間の領域9aにおいては、それぞれ、外箱7と内箱8との間に発泡断熱材9が充填されている。この範囲の発泡断熱材9厚みは、真空断熱材12と同等となっている。発泡断熱材9の熱伝達率は真空断熱材12より大きいため、この部分は断熱性能が小さい。断熱性能が不足すると、冷蔵庫庫内により外箱7が冷やされ、冷蔵庫外気の温度差により外箱7に結露が発生し好ましくない。本実施例の冷蔵庫では、外箱7と発泡断熱材9の間に設置されたホットガスパイプ(図示せず)の熱により外箱7が冷やされるのを防止し、外箱7と冷蔵庫外気との温度差が少なく、結露が発生しない。
このようにして、内箱8の天面(真空断熱材12および領域9aの鉛直投影下)を略同一平面形状としたため、真空断熱材12の投影面以外も内容積を拡大することが出来る。
The partial urethane-free region (region 85) of the ceiling can be provided, for example, within the projection plane of the vacuum heat insulating material 12 and inside the edge of the vacuum heat insulating material 12, as in this embodiment.
Further, as shown in FIG. 9, the width dimension of the vacuum heat insulating material 12 disposed on the top surface of the inner box 8 is smaller than the width dimension of the top surface of the inner box 8. Therefore, in the areas 9a between the left and right corners 8a of the top surface of the inner box 8 and the left and right ends of the vacuum insulation material 12, foamed insulation material 9 is filled between the outer box 7 and the inner box 8, respectively. has been done. The thickness of the foamed heat insulating material 9 within this range is equivalent to that of the vacuum heat insulating material 12. Since the heat transfer coefficient of the foamed heat insulating material 9 is higher than that of the vacuum heat insulating material 12, the heat insulating performance of this portion is low. If the insulation performance is insufficient, the outer box 7 will be cooled by the inside of the refrigerator, and dew condensation will occur on the outer box 7 due to the temperature difference between the outside air of the refrigerator, which is undesirable. In the refrigerator of this embodiment, the outer box 7 is prevented from being cooled by the heat of a hot gas pipe (not shown) installed between the outer box 7 and the foamed heat insulating material 9, and the outer box 7 is prevented from being cooled by the air outside the refrigerator. There is little temperature difference and no condensation occurs.
In this way, the top surface of the inner box 8 (under the vertical projection of the vacuum heat insulating material 12 and the area 9a) is made into a substantially same planar shape, so that the internal volume can be expanded in areas other than the projection surface of the vacuum heat insulating material 12.

≪開口部≫
次に、断熱箱体の開口部の構造に関し、前述のとおり、ウレタン断熱材は、冷蔵庫1の背面を上方に向けた状態で載置され、背面に設けられた例えば4点の注入口から鉛直下方を向いた冷蔵庫1の正面に向かって注入される。本実施例では、冷蔵庫1の正面側(開口部)では、長辺に相当する左側面及び右側面の上下全域だけでなく、短辺に相当する天面及び底面の左右全域に亘って、流動厚みを大きくとっている。このため、冷蔵庫1(断熱箱体)の開口部において、発泡断熱材9を全周に亘って連続的に充填させることができる。このようにして前端断熱材を充填できる。
<Opening>
Next, regarding the structure of the opening of the insulated box, as described above, the refrigerator 1 is placed with its back surface facing upward, and the urethane insulation material is injected from, for example, four injection ports provided on the back surface toward the front surface of the refrigerator 1 facing vertically downward. In this embodiment, the flow thickness is made large on the front side (opening) of the refrigerator 1 not only over the entire top and bottom areas of the left and right sides corresponding to the long sides, but also over the entire left and right areas of the top and bottom surfaces corresponding to the short sides. Therefore, the foam insulation material 9 can be continuously filled around the entire circumference of the opening of the refrigerator 1 (insulated box). In this manner, the front end insulation material can be filled.

≪棚リブ≫
次に、断熱箱体のうち棚リブ13が形成される部分の構造に関し、図8および図9を用いて説明する。冷蔵庫1の側面は、最上段の棚リブ13より上側は、内箱8が外箱7側に凹んだ凹領域(領域81)が形成されて、流動厚みが小さくとられている。凹領域(領域81)は、側面の前端には設けられていない(図7参照)。
<Shelf ribs>
Next, the structure of the portion of the insulating box where the shelf rib 13 is formed will be described with reference to Figures 8 and 9. The side of the refrigerator 1 above the top shelf rib 13 has a recessed area (area 81) where the inner box 8 is recessed toward the outer box 7, reducing the flow thickness. The recessed area (area 81) is not provided at the front end of the side (see Figure 7).

冷蔵庫1の背面の注入口から注入されたウレタン断熱材は、上述のように冷蔵庫1の背面を鉛直上方にした状態で現場発泡が行われる。例えば前端断熱材を形成する領域から発泡が開始したウレタン断熱材は、次に、流動厚みが大きくとられた領域に充填されていく。このため、最上段の棚リブ13から最下段のレールを含む範囲の内箱8内を、冷蔵庫1の背面側へ向けて駆け上がるように発泡断熱材9が充填されていく。このようにして前端断熱材の領域から全体的に連続して、食品支持断熱材が充填されていく。 The urethane heat insulating material injected from the injection port on the back of the refrigerator 1 is foamed on-site with the back of the refrigerator 1 facing vertically upward as described above. For example, the urethane heat insulating material that has started foaming in the area where the front end heat insulating material is to be formed is then filled into the area where the flow thickness is large. Therefore, the foamed heat insulating material 9 is filled in the inner box 8 in the range from the uppermost shelf rib 13 to the lowermost rail so as to run upward toward the back side of the refrigerator 1. In this way, the food support insulation material is filled continuously from the area of the front end insulation material.

一方、棚リブ13の支持に寄与しない、最上段の棚リブ13より図8中の上方(冷蔵庫1使用時の上方)に位置する側面については、流動厚みが小さくとられている。本実施例ではウレタンが流動できない程度に小さい流動厚みのため、冷蔵庫1の前端からは、ウレタン断熱材がまったく駆け上がらない。 On the other hand, the flow thickness is small for the side surfaces located above the top shelf rib 13 in FIG. 8 (above when the refrigerator 1 is in use) that do not contribute to supporting the shelf ribs 13. In this embodiment, the flow thickness is small enough that the urethane cannot flow, so no urethane insulation rises from the front end of the refrigerator 1.

<天井パネル>
図10は、冷蔵室2の天井部を正面から見たときの図であり、図11は、冷蔵室2の天井部の庫内灯14付近を示す部分断面斜視図である。庫内灯14は、透光性のカバー部材によって覆われている。カバー部材の材質は、特に限定されるものではないが、透明の合成樹脂が望ましい。
<Ceiling panel>
FIG. 10 is a front view of the ceiling of the refrigerator compartment 2, and FIG. 11 is a partially sectional perspective view showing the vicinity of the internal light 14 on the ceiling of the refrigerator compartment 2. The interior light 14 is covered with a translucent cover member. The material of the cover member is not particularly limited, but transparent synthetic resin is preferable.

天井部の前側では、内箱8に庫内灯14が取り付けられるため、図11に示すように、内箱8と真空断熱材12の間に発泡断熱材9が充填され、庫内灯14の支持強度を向上させている。一方、天井部の後側においては、真空断熱材12と内箱8との隙間が小さく(例えば1mm未満)、内箱8が高い位置にあるので、最上段の棚への食品収納スペースが大きくなっている。ただし、真空断熱材12と内箱8とは接触させずに、使用者が缶などを天井部にぶつけたときの緩衝材として、少しでも隙間はあった方が良い。 On the front side of the ceiling, the interior light 14 is attached to the inner box 8, so as shown in FIG. Improves support strength. On the other hand, on the rear side of the ceiling, the gap between the vacuum insulation material 12 and the inner box 8 is small (for example, less than 1 mm), and the inner box 8 is located at a high position, so the food storage space on the top shelf is large. It has become. However, it is preferable that the vacuum insulation material 12 and the inner box 8 not be in contact with each other, and that there be at least a small gap as a cushioning material when a user hits a can or the like against the ceiling.

このように真空断熱材12と内箱8との隙間が小さい領域には、発泡断熱材9が充填されないため、外箱7や真空断熱材12に対する発泡断熱材9を介した内箱8の固着はなされていない。その結果、内箱8が自重で垂れ下がってしまい、外観上好ましくない。そこで、本実施例では、ウレタンレス部分の内箱8の下方に、合成樹脂製の天井パネル16を取り付けた状態で、ウレタン断熱材の注入発泡が行われ、天井パネル16が冷蔵室2の天井面の一部を形成している。 In this way, the foam insulation material 9 is not filled in the area where the gap between the vacuum insulation material 12 and the inner box 8 is small, so the inner box 8 is not fixed to the outer box 7 or the vacuum insulation material 12 via the foam insulation material 9. As a result, the inner box 8 sags under its own weight, which is undesirable from an appearance perspective. Therefore, in this embodiment, urethane insulation material is injected and foamed with a synthetic resin ceiling panel 16 attached below the inner box 8 in the urethane-free portion, and the ceiling panel 16 forms part of the ceiling surface of the refrigerator chamber 2.

<天井パネルの支持構造>
天井パネル16は、前側が下方へ延びる傾斜面16aを有しており、この傾斜面16aに対して内箱8の外側からネジ17によって締結され、脱落が防止されているので、ネジ17の存在が使用者から視認し難い。また、ネジ17の頭は最終的に発泡断熱材9で覆われるので、ネジ17の緩みが抑制されるだけでなく、使用者がネジ17を外したり、ネジ17が真空断熱材12と接触して損傷させたりするのが防止されている。
<Ceiling panel support structure>
The ceiling panel 16 has an inclined surface 16a extending downward on the front side, and is fastened to this inclined surface 16a by screws 17 from the outside of the inner box 8 to prevent them from falling off, so that the presence of the screws 17 is difficult for users to see. In addition, the heads of the screws 17 are ultimately covered with the foam insulation material 9, which not only prevents the screws 17 from loosening, but also prevents the users from removing the screws 17 or the screws 17 from coming into contact with the vacuum insulation material 12 and causing damage.

なお、天井パネル16の前側を傾斜面16aとすることで、冷蔵室2の後方から吐出された冷気が斜め下へ案内され、ドアポケット内の食品を冷却し易くなる。また、傾斜のない段差と比べて、食品を出し入れし易い利点や、ウレタン断熱材が流動し易い利点もある。 By making the front side of the ceiling panel 16 an inclined surface 16a, the cold air discharged from the rear of the refrigerator compartment 2 is guided diagonally downward, making it easier to cool food in the door pocket. In addition, compared to a step with no incline, this has the advantage that it is easier to put food in and take it out, and the urethane insulation material flows more easily.

図12は、外箱7、内箱8および真空断熱材12を除いて、冷蔵室2の天井部を上方から見たときの斜視図であり、図13は、冷蔵室2の天井部を前方から見たときの部分断面図である。図12に示すように、天井パネル16の後側には、左右方向の中央に爪部16bが形成されており、内箱8に対して係止される。この爪部16bは、内箱8と同程度の左右幅寸法を有する天井パネル16に対して、一部の左右幅にしか形成されていないため、天井パネル16の組み付け作業性が高い。 Figure 12 is a perspective view of the ceiling of the refrigerator compartment 2 from above, excluding the outer box 7, inner box 8, and vacuum insulation material 12, and Figure 13 is a partial cross-sectional view of the ceiling of the refrigerator compartment 2 from the front. As shown in Figure 12, a claw portion 16b is formed in the center in the left-right direction on the rear side of the ceiling panel 16, which is engaged with the inner box 8. This claw portion 16b is formed only on a portion of the left-right width of the ceiling panel 16, which has a left-right width dimension similar to that of the inner box 8, making it easy to assemble the ceiling panel 16.

天井パネル16の左右両端は、内箱8の側壁から前後方向に延びるリブ(図示せず)に載置されているのみであり、水平方向については拘束されていない。また、天井パネル16の後端についても、爪部16bによって上下方向が拘束されているのみである。このため、天井パネル16が、環境温度の変化に伴って熱変形したり、内箱8を介して受ける発泡断熱材9の発泡圧によってたわんだりするのを抑制できる。なお、天井パネル16の左右端と前後端のいずれかが、水平方向について非拘束であれば、天井パネル16を他の方法で支持しても良い。 The left and right ends of the ceiling panel 16 are simply placed on ribs (not shown) extending in the front-to-rear direction from the side walls of the inner box 8, and are not constrained in the horizontal direction. The rear end of the ceiling panel 16 is only constrained in the up-down direction by the claws 16b. This prevents the ceiling panel 16 from thermally deforming due to changes in the environmental temperature, or from sagging due to the foaming pressure of the foam insulation material 9 received through the inner box 8. Note that as long as either the left or right end or the front or rear end of the ceiling panel 16 is not constrained in the horizontal direction, the ceiling panel 16 may be supported in another manner.

また、天井パネル16の上面には、左右中央を前後方向に延びる第1リブ16cと、前後中央を左右方向に延びる第2リブ16dと、が形成されており、天井パネル16の剛性が高められている。なお、第1リブ16cや第2リブ16dは複数形成されていても良い。また、天井パネル16の左右両端には、左右方向に延びる補強片16eが、前後方向に並んで複数形成されているため、左右の側面を形成する内箱8と外箱7との間に充填される発泡断熱材9の発泡圧によって天井パネル16が変形するのを抑制できる。 The upper surface of the ceiling panel 16 is formed with a first rib 16c extending in the front-rear direction at the center of the left and right, and a second rib 16d extending in the front-rear direction at the center of the left and right, thereby increasing the rigidity of the ceiling panel 16. Note that multiple first ribs 16c and second ribs 16d may be formed. In addition, multiple reinforcing pieces 16e extending in the left-right direction are formed side by side in the front-rear direction at both left and right ends of the ceiling panel 16, so that deformation of the ceiling panel 16 due to the foaming pressure of the foam insulation material 9 filled between the inner box 8 and the outer box 7 that form the left and right side surfaces can be suppressed.

ここで、内箱8と天井パネル16は接着されておらず、図13に示すように、内箱8と天井パネル16との間には、隙間が形成されており、内箱8がある程度垂れ下がっても天井パネル16に負荷がかからないようになっている。なお、第1リブ16cや第2リブ16dは、内箱が垂れ下がっても、その全面が天井パネル16に接触するのを防ぐ役割も果たしている。また、本実施例の天井パネル16は、ガラスフィラー10質量%以下で成型しているため、成型時の反りが小さくなっている。なお、天井パネルの材質は合成樹脂に限定するものではなく、ウレタン断熱材の注入発泡後に取り付ける構造でもよい。 Here, the inner box 8 and the ceiling panel 16 are not bonded, and as shown in FIG. 13, a gap is formed between the inner box 8 and the ceiling panel 16, so that the inner box 8 hangs down to some extent. No load is applied to the ceiling panel 16 even when the ceiling panel 16 is closed. Note that the first rib 16c and the second rib 16d also serve to prevent the entire surface of the inner box from coming into contact with the ceiling panel 16 even if the inner box hangs down. Furthermore, since the ceiling panel 16 of this embodiment is molded with 10% by mass or less of glass filler, the warpage during molding is reduced. Note that the material of the ceiling panel is not limited to synthetic resin, and may be attached after injecting and foaming the urethane heat insulating material.

<天井部の配線>
図14は、冷蔵室2の天井部を上方から見たときの平面図に、真空断熱材12と、庫内灯14と、庫内灯14用の配線(コード15)と、を透かせて表示させたものである。図14に示すように、庫内灯14から引き出されたコード15は、真空断熱材12の側方を通って後方へ至り、さらに背面側を下降して図示しない制御基板に接続される。
<Ceiling wiring>
Fig. 14 is a plan view of the ceiling of the refrigerator compartment 2 as seen from above, with the vacuum insulation material 12, the interior light 14, and the wiring (cord 15) for the interior light 14 shown through the transparent portions. As shown in Fig. 14, the cord 15 drawn from the interior light 14 passes along the side of the vacuum insulation material 12 to the rear, and then descends along the rear side to be connected to a control board (not shown).

ここで、天井部の真空断熱材12の下面と内箱8との間には、図6に示すように、前側領域と後側領域を除き、発泡断熱材9が充填されない。発泡断熱材9が充填されていない部分にコード15を配置すると、ウレタン断熱材の発泡時に内箱8側から治具で押さえる際に、内箱8が押し付けられてコード15の跡が付いたり、コード15が真空断熱材12を損傷したりする可能性がある。そのため、本実施例では、発泡断熱材9が充填される部分に、コード15を配置するようにした。すなわち、真空断熱材12の鉛直投影下方に配線するのは、発泡断熱材9の存在する部分である前側領域と後側領域のみとし、その途中は、真空断熱材12の鉛直投影外の発泡断熱材9の存在する部分に配線するようにした。 Here, as shown in FIG. 6, the foamed heat insulating material 9 is not filled between the lower surface of the vacuum heat insulating material 12 on the ceiling and the inner box 8, except for the front region and the rear region. If the cord 15 is placed in a part where the foam insulation material 9 is not filled, when the urethane insulation material is foamed and pressed with a jig from the inner box 8 side, the inner box 8 will be pressed and the cord 15 will leave marks. There is a possibility that the cord 15 may damage the vacuum insulation material 12. Therefore, in this embodiment, the cord 15 is placed in the area where the foamed heat insulating material 9 is filled. That is, the wiring below the vacuum insulation material 12 in the vertical projection is only in the front region and the rear region where the foam insulation material 9 is present, and in the middle, the foam insulation material outside the vertical projection of the vacuum insulation material 12 is wired. Wiring was done in the part where material 9 was present.

ただし、予め発泡された発泡体などの介在部材をコード15と内箱8との間に設けたり、内箱8側や真空断熱材12側にコード15を避ける空間を設けたりすれば、発泡断熱材9が充填されていない部分であっても、コード15を配線することは可能である。 However, if an intervening member such as a pre-foamed foam is provided between the cord 15 and the inner box 8, or if a space is provided on the inner box 8 side or on the vacuum insulation material 12 side to avoid the cord 15, it is possible to wire the cord 15 even in areas that are not filled with the foam insulation material 9.

<断熱仕切部>
次に、下段冷凍室5と野菜室6とを隔てる断熱仕切部11に関し、具体的に説明する。図15は、下段冷凍室5(冷凍温度帯室)と野菜室6(冷蔵温度帯室)とを仕切る断熱仕切部11の構成を示す斜視図である。図15に示すように、断熱仕切部11は、上ケース111と、下ケース112と、を組み合わせて構成される。さらに、断熱仕切部11は、上ケース111と下ケース112とで囲まれた空間内に、上から、真空断熱材12と、ヒータ113と、を備えている。そして、外箱7と内箱8の空間に発泡断熱材9を充填する際に、断熱箱体の背面側に設けられた前述の4点の注入口から注入されたウレタン断熱材が、断熱仕切部11の左右前側に形成されたウレタン流入口11aから断熱仕切部11の内部に流入する。断熱仕切部11の内部に流入したウレタン断熱材は、真空断熱材12の周囲を回り込んで充填されていき、最終的に上ケース111および下ケース112とともに、断熱箱体に対して固着される。
<Insulation partition>
Next, the heat insulating partition part 11 that separates the lower freezer compartment 5 and the vegetable compartment 6 will be specifically explained. FIG. 15 is a perspective view showing the configuration of a heat insulating partition 11 that partitions the lower freezer compartment 5 (freezing temperature range room) and the vegetable compartment 6 (refrigerating temperature range room). As shown in FIG. 15, the heat insulating partition 11 is constructed by combining an upper case 111 and a lower case 112. Further, the heat insulating partition section 11 includes a vacuum heat insulating material 12 and a heater 113 from above in a space surrounded by an upper case 111 and a lower case 112. When filling the space between the outer box 7 and the inner box 8 with the foam insulation material 9, the urethane insulation material injected from the four injection ports provided on the back side of the insulation box is filled into the insulation partition. Urethane flows into the inside of the heat insulating partition part 11 from urethane inlets 11a formed on the left and right front sides of the part 11. The urethane heat insulating material that has flowed into the inside of the heat insulating partition 11 wraps around the vacuum heat insulating material 12 to fill it, and is finally fixed to the heat insulating box together with the upper case 111 and the lower case 112. .

≪上ケース≫
上ケース111は、下段冷凍室5と面しているが、図15に示すように、左右に2つの上面凹部111aを有しているため、下段冷凍室5の内容積を大きくすることが可能となっている。なお、下ケース112の下面凹部112a(図21参照)と、その上方に位置する真空断熱材12の屈曲部12a(図18参照)の前側と、に対応する形で、上面凹部111aの前側は、後側と比べて底面が浅くなっている。また、左右の上面凹部111aで挟まれる部分には、上面凹部111aの周囲と同じ高さとなる架橋部111bが形成される。
<Upper case>
The upper case 111 faces the lower freezer compartment 5, and has two upper surface recesses 111a on the left and right as shown in Fig. 15, which allows the internal volume of the lower freezer compartment 5 to be increased. The front side of the upper surface recess 111a has a shallower bottom than the rear side in correspondence with the lower surface recess 112a (see Fig. 21) of the lower case 112 and the front side of the bent portion 12a (see Fig. 18) of the vacuum insulation material 12 located above it. In addition, a bridge portion 111b is formed in the portion sandwiched between the left and right upper surface recesses 111a, the bridge portion 111b being the same height as the periphery of the upper surface recess 111a.

図16は、断熱仕切部11を上方(下段冷凍室5側)から見たときの平面図である。図17は、図16のA-A断面矢視図であり、図18は、図16のB-B断面矢視図であり、図19は、図16のC-C断面矢視図であり、図20は、図16のD-D断面矢視図である。 Figure 16 is a plan view of the heat-insulating partition 11 as viewed from above (the lower freezer compartment 5 side). Figure 17 is a cross-sectional view taken along the line A-A in Figure 16, Figure 18 is a cross-sectional view taken along the line B-B in Figure 16, Figure 19 is a cross-sectional view taken along the line C-C in Figure 16, and Figure 20 is a cross-sectional view taken along the line D-D in Figure 16.

図17および図18に示すように、上ケース111の下方には、屈曲部12aを有する1枚の真空断熱材12が位置している。真空断熱材12の前後寸法は、上面凹部111aの前後寸法と同じか大きく、真空断熱材12の左端は、左側の上面凹部111aの左端と同じか左側にあり、真空断熱材12の右端は、右側の上面凹部111aの右端と同じか右側にある。ここで、上面凹部111aが形成された部分の下方(図18参照)は、2つの上面凹部111aの間の部分である架橋部111bの下方(図17参照)と比べて、上ケース111と真空断熱材12との間の隙間が小さい(例えば6mm未満)。したがって、ウレタン流入口11aから断熱仕切部11の内部に流入したウレタン断熱材は、上面凹部111aが形成された部分と真空断熱材12とで挟まれた空間へは流動できず、上面凹部111aが形成されていない部分と真空断熱材12とで挟まれた空間へ流動することになる。つまり、ウレタン断熱材の流動経路は、図16上の点線Eで示すように、各上面凹部111aの周囲の下方に存在する隙間を流動して行き、最終的には、架橋部111bの下方を前後から突き当たる形となる。 As shown in FIGS. 17 and 18, a piece of vacuum heat insulating material 12 having a bent portion 12a is located below the upper case 111. The front-to-back dimension of the vacuum insulation material 12 is the same as or larger than the front-to-back dimension of the upper surface recess 111a, the left end of the vacuum insulation material 12 is the same as or to the left of the left end of the left upper surface recess 111a, and the right end of the vacuum insulation material 12 is It is located at the same level as or to the right of the right end of the right upper surface recess 111a. Here, the lower part of the part where the upper surface recess 111a is formed (see FIG. 18) is closer to the upper case 111 than the lower part of the bridge part 111b (see FIG. 17), which is the part between the two upper surface recesses 111a. The gap with the heat insulating material 12 is small (for example, less than 6 mm). Therefore, the urethane heat insulating material that has flowed into the inside of the heat insulating partition part 11 from the urethane inlet 11a cannot flow into the space sandwiched between the vacuum heat insulating material 12 and the part where the top surface recess 111a is formed, and the top surface recess 111a It will flow into the space sandwiched between the unformed part and the vacuum heat insulating material 12. In other words, as shown by the dotted line E in FIG. 16, the flow path of the urethane heat insulating material is as shown by the dotted line E in FIG. The shape is such that it hits you from the front and back.

このように、断熱仕切部11の中央近傍において、上ケース111の架橋部111bの下方を前後に渡って発泡断熱材が充填されるので、上ケース111のたわみが低減されるなど、断熱仕切部11の剛性が高まり、真空断熱材12の損傷などが抑制される。また、ウレタン流入口11aより流入したウレタン断熱材は上面凹部111aによりウレタン断熱材の流れは複数方向へ分岐する。流れが分岐したウレタン断熱材は断熱仕切部11内で何れかの部分(最終充填部)でぶつかるためボイドのリスクがある。しかし、架橋部111bを設けることで、架橋部111bの下方の前端および後端へウレタン断熱材が流入する流れを作ることができる。架橋部111bの下方の前端および後端から流れてきたウレタンは突き当たるため、ボイドが発生したとしても架橋部111bの領域内にとどめることができる。さらに、架橋部111bの鉛直投影下には真空断熱材12が存在している。すなわち、仮にボイドが発生したとしても、ボイドが発生する位置は真空断熱材12の領域内にとどめることができるため、ボイドによる断熱仕切壁の断熱性能への影響を最小化することができる。なお、本実施例は、上面凹部111aが左右に並設され前後方向に架橋部111bが形成される構成であるが、上面凹部111aが上下に並設され左右方向に架橋部111bが形成される構成であっても良い。また、架橋部111bの高さはウレタンの流入の確保するため、上面凹部111aの下面よりも少なくとも高く形成されればよいので、本実施例に限るものではない。 In this way, in the vicinity of the center of the heat insulating partition 11, the foamed heat insulating material is filled forward and backward below the bridge portion 111b of the upper case 111, so that the deflection of the upper case 111 is reduced, etc. The rigidity of the vacuum insulation material 11 is increased, and damage to the vacuum insulation material 12 is suppressed. Further, the flow of the urethane heat insulating material flowing from the urethane inlet 11a is branched into multiple directions due to the upper surface recess 111a. Since the urethane heat insulating material whose flow is branched collides with any part (the final filling part) within the heat insulating partition 11, there is a risk of voids. However, by providing the bridge portion 111b, it is possible to create a flow in which the urethane heat insulating material flows into the lower front and rear ends of the bridge portion 111b. Since the urethane flowing from the lower front and rear ends of the bridge portion 111b collides with each other, even if a void occurs, it can be confined within the region of the bridge portion 111b. Furthermore, the vacuum heat insulating material 12 exists under the vertical projection of the bridge portion 111b. That is, even if a void occurs, the position where the void occurs can be kept within the area of the vacuum heat insulating material 12, so that the effect of the void on the heat insulation performance of the heat insulating partition wall can be minimized. Note that in this embodiment, the upper surface recesses 111a are arranged side by side in the left and right directions, and the bridge portions 111b are formed in the front-rear direction. It may be a configuration. Furthermore, the height of the bridging portion 111b is not limited to this embodiment, since it is sufficient that the height of the bridging portion 111b is at least higher than the lower surface of the upper recessed portion 111a in order to ensure the inflow of urethane.

また、真空断熱材12の前側および後側には、図17および図18に示すように、発泡断熱材9が充填され、真空断熱材12の左側および右側にも、図19および図20に示すように、発泡断熱材9が充填される。一方、真空断熱材12の下面側の一部は、両面テープ(図示せず)が張られ、下ケース112と接着している。このため、真空断熱材12と下ケース112との間にも基本的には発泡断熱材9が充填されない。しかし、図20に示すように、真空断熱材12の屈曲部12aの前側の下方には、下ケース112の前側に形成される下面凹部112aの領域を除き、下ケース112との間に比較的大きな隙間が生じるため、発泡断熱材9が充填される。 Furthermore, the front and rear sides of the vacuum insulation material 12 are filled with foam insulation material 9 as shown in Figs. 17 and 18, and the left and right sides of the vacuum insulation material 12 are also filled with foam insulation material 9 as shown in Figs. 19 and 20. On the other hand, a part of the underside of the vacuum insulation material 12 is attached to the lower case 112 with double-sided tape (not shown). Therefore, the foam insulation material 9 is not basically filled between the vacuum insulation material 12 and the lower case 112. However, as shown in Fig. 20, a relatively large gap is created between the lower case 112 and the bent portion 12a of the vacuum insulation material 12 below the front side, except for the area of the lower surface recess 112a formed on the front side of the lower case 112, so the foam insulation material 9 is filled.

このように、本実施例では、断熱仕切部11内の真空断熱材12の上面側および下面側が部分ウレタンレスとなっているため、冷蔵庫1全体として発泡断熱材9の充填量を低減できる利点がある。その上で、真空断熱材12の前後および左右には、発泡断熱材9が充填されるので、断熱仕切部11内で真空断熱材12を安定的に支持し、断熱仕切部11としての強度が確保されている。 In this way, in this embodiment, the upper and lower sides of the vacuum insulation material 12 in the insulating partition 11 are partially urethane-free, which has the advantage that the amount of foam insulation material 9 filled in the refrigerator 1 as a whole can be reduced. In addition, the front, rear, left and right sides of the vacuum insulation material 12 are filled with foam insulation material 9, which stably supports the vacuum insulation material 12 within the insulating partition 11 and ensures the strength of the insulating partition 11.

≪下ケース≫
図21は、断熱仕切部11を下方(野菜室6側)から見たときの斜視図である。図21で破線および点線で示すように、下ケース112の上方にはヒータ113があり、ヒータ113の上方には真空断熱材12がある。また、図示していないが、本実施例の冷蔵庫1には、野菜室6の容器の上面を開閉可能な野菜室カバーが設置可能な構造となっている。この野菜室カバーは、容器の密閉度を高めることで、容器内の野菜の乾燥を抑制するものであり、断熱仕切部11の下ケース112に設けられた野菜室カバー取付部112bによって支持される。
≪Lower case≫
FIG. 21 is a perspective view of the heat insulating partition 11 viewed from below (the side of the vegetable compartment 6). As shown by broken lines and dotted lines in FIG. 21, a heater 113 is located above the lower case 112, and a vacuum heat insulating material 12 is located above the heater 113. Although not shown, the refrigerator 1 of this embodiment has a structure in which a vegetable compartment cover that can open and close the top surface of the containers in the vegetable compartment 6 can be installed. This vegetable compartment cover prevents the vegetables in the container from drying by increasing the degree of sealing of the container, and is supported by the vegetable compartment cover mounting portion 112b provided on the lower case 112 of the heat insulating partition portion 11. .

下ケース112は、前側に、野菜室カバー取付部112bと、当該野菜室カバー取付部112bの左右方向に並設された下面凹部112aと、を有している。下面凹部112aは、野菜室カバー取付部112bよりも後側において上方へ突出する形状となっており、真空断熱材12の位置を規制できるようになっている。このため、真空断熱材12が野菜室カバー取付部112bに当接して損傷するのを防止できる。また、下面凹部112aの後側の真空断熱材12との対向面は、傾斜面112cとしているため、真空断熱材12が下面凹部112aとの接触で損傷するのも抑制される。さらに、下面凹部112aは左右方向に複数並設され、下面凹部112aが左右方向の全域に跨って連続的には形成されていないため、ウレタン断熱材が流入し易く、結果的に、断熱仕切部11の前側の支持強度を向上させることができる。 The lower case 112 has, on the front side, a vegetable compartment cover attachment part 112b and a lower surface recessed part 112a arranged in parallel in the left-right direction of the vegetable compartment cover attachment part 112b. The lower surface recess 112a has a shape that protrudes upward on the rear side of the vegetable compartment cover attachment part 112b, so that the position of the vacuum insulation material 12 can be regulated. Therefore, it is possible to prevent the vacuum heat insulating material 12 from coming into contact with the vegetable compartment cover mounting portion 112b and being damaged. Moreover, since the surface facing the vacuum heat insulating material 12 on the rear side of the lower surface recess 112a is an inclined surface 112c, damage to the vacuum heat insulating material 12 due to contact with the lower surface recess 112a is suppressed. Furthermore, since a plurality of lower surface recesses 112a are arranged side by side in the left-right direction, and the lower surface recesses 112a are not formed continuously over the entire left-right direction, the urethane heat insulating material easily flows into the heat-insulating partition. 11 can be improved in support strength on the front side.

ヒータ113は、断熱仕切部11(下ケース112)が面する野菜室6を加熱して、野菜室6内を所定の温度帯に保つものであり、図示しないが、伝熱線と、伝熱線を覆うアルミシートと、伝熱線と接続されるリード線と、を備えて構成される。本実施例で用いられる平面状のヒータ113は、真空断熱材12のように屈曲部12aが形成できないため、下面凹部112aの傾斜面112cまで前方へ伸ばすことが難しい。しかし、ヒータ113が届かない前側の領域にも真空断熱材12が上方に位置しているので、結露の発生を防ぐことは可能である。 The heater 113 heats the vegetable compartment 6 facing the heat insulating partition 11 (lower case 112) to maintain the inside of the vegetable compartment 6 within a predetermined temperature range. It is comprised of a covering aluminum sheet and lead wires connected to the heat transfer wires. Since the planar heater 113 used in this embodiment cannot have a bent portion 12a unlike the vacuum heat insulating material 12, it is difficult to extend it forward to the inclined surface 112c of the lower surface recess 112a. However, since the vacuum heat insulating material 12 is located above the front area where the heater 113 cannot reach, it is possible to prevent condensation from occurring.

本実施例では、下面凹部112aより後方において、下ケース112の上方に発泡断熱材9が充填されない領域が存在するため、下ケース112が自重やたわみで垂れ下がる可能性もある。しかし、下ケース112が面する野菜室6には、引き出し式の容器が存在しており、断熱仕切部11の下面は、使用者が目視し難い場所であることから、本実施例では、美観への悪影響を抑えつつ、発泡断熱材9の充填量の低減を図っている。 In this embodiment, since there is a region above the lower case 112 in which the foamed heat insulating material 9 is not filled behind the lower surface recess 112a, there is a possibility that the lower case 112 may sag due to its own weight or bending. However, there is a pull-out container in the vegetable compartment 6 that the lower case 112 faces, and the bottom surface of the heat insulating partition 11 is a place that is difficult for the user to see visually. The amount of filling of the foamed heat insulating material 9 is reduced while suppressing the adverse effects on the foamed heat insulating material 9.

既に述べたように、本実施例の断熱仕切部11には、上ケース111の上面凹部111aと、下ケース112の下面凹部112aと、が存在する。ここで、上ケース111が面する下段冷凍室5の方が、下ケース112が面する野菜室6よりも温度帯が低いので、冷気の循環流量を多くする必要がある。そのため、上面凹部111aの全体の凹み体積を、下面凹部112aの全体の凹み体積よりも大きくすることで、下段冷凍室5の底部を流れる冷気の風路寸法を優先的に確保することができる。 As already mentioned, the heat insulating partition 11 of this embodiment includes the upper surface recess 111a of the upper case 111 and the lower surface recess 112a of the lower case 112. Here, since the temperature range of the lower freezer compartment 5 facing the upper case 111 is lower than that of the vegetable compartment 6 facing the lower case 112, it is necessary to increase the circulation flow rate of cold air. Therefore, by making the entire recess volume of the upper surface recess 111a larger than the entire recess volume of the lower surface recess 112a, the air path size of the cold air flowing through the bottom of the lower freezer compartment 5 can be preferentially secured.

≪コード仮収納部≫
図22は、断熱仕切部11のうち上ケース111を除いた状態で、上方(下段冷凍室5側)から見たときの平面図であり、図23は、図22の破線部Fの部分拡大斜視図である。ヒータ113のリード線など断熱仕切部11を通すコード類は、断熱仕切部11を断熱箱体に組み付けてウレタン断熱材を注入発泡する前に、所定の位置に配置する必要がある。そこで、本実施例では、断熱仕切部11を断熱箱体に組み付ける際の作業性を向上させるため、コード類を一時的に収納しておく凹形状の空間として、コード仮収納部11bが、下ケース112の前方側部に形成されている。一次的に収納されたコード類は、断熱仕切部11の組み付けが終わった段階で、コード仮収納部11bから取り出され、所定の位置に結線され、ウレタン断熱材の注入発泡が行われる。
≪Code temporary storage section≫
FIG. 22 is a plan view of the heat insulating partition 11 with the upper case 111 removed, as seen from above (lower freezer compartment 5 side), and FIG. 23 is a partial enlargement of the broken line portion F in FIG. FIG. Cords that pass through the heat insulating partition 11, such as the lead wires of the heater 113, need to be placed in predetermined positions before the heat insulating partition 11 is assembled to the heat insulating box and the urethane heat insulating material is injected and foamed. Therefore, in this embodiment, in order to improve the workability when assembling the heat insulating partition part 11 to the heat insulating box, the temporary cord storage part 11b is provided below as a concave space to temporarily store the cords. It is formed on the front side of the case 112. The temporarily stored cords are taken out from the temporary cord storage section 11b after the assembly of the heat insulation partition section 11 is completed, wired at a predetermined position, and urethane heat insulating material is injected and foamed.

コード仮収納部11bは、図23に示すように、コード類が真空断熱材12に接触して損傷するのを防ぐ内壁11b1と、コード類が外へ抜け出るのを防ぐ外壁11b2と、で区画されている。また、内壁11b1は前後方向に複数設けられ、その間に内側開口11b3が形成されているので、ウレタン断熱材が内側開口11b3を通じて流入できる。一方、外壁11b2の後側には、第1外側開口11b4が形成されており、コード類をコード仮収納部11b内へ引き込むことが可能となっている。また、外壁11b2の前側には、内側開口11b3と対向するように、第2外側開口11b5が形成されているため、断熱仕切部11へのウレタン流入口11aから注入されたウレタン断熱材が、コード仮収納部11b内を通過し易くなっている。なお、第2外側開口11b5と対向する位置だけでなく、第1外側開口11b4と対向する位置にもウレタン流入口11aが形成されているので、第1外側開口11b4からもウレタン断熱材が流入する。このように、コード仮収納部11bが、断熱仕切部11へのウレタン流入口11aと面する位置に形成されているので、凹形状の空間内には発泡断熱材9が充填され、断熱性が確保される。 As shown in FIG. 23, the temporary cord storage section 11b is divided by an inner wall 11b1 that prevents cords from coming into contact with the vacuum insulation material 12 and being damaged, and an outer wall 11b2 that prevents cords from slipping out. In addition, multiple inner walls 11b1 are provided in the front-rear direction, and inner openings 11b3 are formed between the inner walls 11b1, so that urethane insulation can flow in through the inner openings 11b3. On the other hand, a first outer opening 11b4 is formed on the rear side of the outer wall 11b2, so that cords can be drawn into the temporary cord storage section 11b. In addition, a second outer opening 11b5 is formed on the front side of the outer wall 11b2 so as to face the inner opening 11b3, so that urethane insulation injected from the urethane inlet 11a to the insulation partition section 11 can easily pass through the temporary cord storage section 11b. In addition, since the urethane inlet 11a is formed not only at the position facing the second outer opening 11b5 but also at the position facing the first outer opening 11b4, the urethane insulation material also flows in from the first outer opening 11b4. In this way, since the temporary cord storage section 11b is formed at a position facing the urethane inlet 11a to the insulation partition section 11, the foam insulation material 9 is filled in the concave space, ensuring insulation.

また、コード仮収納部11bの内壁11b1は、真空断熱材12がウレタン流入口11aを塞がないように、真空断熱材12の位置を規制する役割も果たしている。さらに、内壁11b1や外壁11b2は、下ケース112から上方へ延びるものの、上ケース111とは非接触とするのが望ましい。これにより、断熱仕切部11の上下にある異なる温度帯の貯蔵室の間で熱伝導が生じるのを抑制することが可能となる。なお、本実施例では、内壁11b1や外壁11b2を下ケース112に形成するものであるが、内壁11b1や外壁11b2を上ケース111に形成して下方へ延ばすような場合でも、内壁11b1や外壁11b2の下端を下ケース112とは離間させることで、断熱仕切部11を介した熱伝導を抑制できる。 Further, the inner wall 11b1 of the temporary cord storage section 11b also plays a role of regulating the position of the vacuum insulation material 12 so that the vacuum insulation material 12 does not block the urethane inlet 11a. Furthermore, although the inner wall 11b1 and the outer wall 11b2 extend upward from the lower case 112, it is desirable that they do not contact the upper case 111. This makes it possible to suppress heat conduction between the storage chambers located above and below the heat insulating partition 11 and having different temperature zones. In this embodiment, the inner wall 11b1 and the outer wall 11b2 are formed on the lower case 112, but even when the inner wall 11b1 and the outer wall 11b2 are formed on the upper case 111 and extend downward, the inner wall 11b1 and the outer wall 11b2 By separating the lower end of the lower case 112 from the lower case 112, heat conduction through the heat insulating partition 11 can be suppressed.

実施例2に係る冷蔵庫1に関し、図24を用いて説明する。本実施例は、実施例1のような天井パネル16を設けずに、内箱8と真空断熱材12との間を接着剤18で固定するものである。 The refrigerator 1 according to the second embodiment will be explained using FIG. 24. In this embodiment, the inner box 8 and the vacuum heat insulating material 12 are fixed with an adhesive 18 without providing the ceiling panel 16 as in the first embodiment.

前述した通り、従来の冷蔵庫は、天井部の真空断熱材12と内箱8との間には、発泡断熱材9が充填されているため、内箱8が真空断熱材12に固着されている。したがって、内箱8の自重や、高温下での内箱8の線膨張があっても、内箱8の垂れ下がりは殆ど存在しない。しかし、真空断熱材12と内箱8との間に発泡断熱材9が充填されていない場合、内箱8がたわんで垂れ下がり易い。そこで、本実施例では、図24に示すように、真空断熱材12と内箱8とをホットメルト等の接着剤18で固定することで、内箱8の垂れ下がりを抑制している。なお、使用する接着剤18としては、内箱8のたわみに追従できるよう弾性変形可能な材料が望ましい。 As mentioned above, in the conventional refrigerator, the foam insulation material 9 is filled between the vacuum insulation material 12 on the ceiling and the inner box 8, so the inner box 8 is fixed to the vacuum insulation material 12. . Therefore, even if the inner box 8 has its own weight or the inner box 8 undergoes linear expansion under high temperatures, there is almost no sagging of the inner box 8. However, if the foamed heat insulating material 9 is not filled between the vacuum heat insulating material 12 and the inner box 8, the inner box 8 tends to bend and sag. Therefore, in this embodiment, as shown in FIG. 24, the vacuum insulation material 12 and the inner box 8 are fixed with an adhesive 18 such as hot melt to suppress the inner box 8 from sagging. Note that the adhesive 18 used is preferably a material that can be elastically deformed so as to follow the deflection of the inner box 8.

また、接着剤18だけでは、内箱8のたわみに追従できず、真空断熱材12と内箱8とが剥離してしまう可能性がある。さらに、真空断熱材12には、厚さ、反りおよび表面凹凸のバラツキが存在し、内箱8や接着剤18にも、厚さのバラツキが必然的に存在する。そこで、本実施例では、内箱8のたわみや各部品の寸法バラツキを吸収し、真空断熱材12と内箱8とのクリアランスを一定に保つため、外箱7と真空断熱材12との間に、スペーサ19を設けた。スペーサ19は、ある程度の厚さを有する介在部材であり、かつ、外箱7と真空断熱材12とを接着させる機能を有しており、例えば、ポリエチレン等によりシート状に形成した両面テープなどが用いられる。なお、厚みを保てれば、スペーサ19としてホットメルトなどの接着剤を用いても良い。また、スペーサ19は真空断熱材12の上面全体に設ける必要はなく、ウレタンレス部の領域において少なくとも一部または全部に配置されていることが望ましい。 In addition, the adhesive 18 alone cannot follow the deflection of the inner box 8, and there is a possibility that the vacuum insulation material 12 and the inner box 8 may peel off. Furthermore, the vacuum insulation material 12 has variations in thickness, warping, and surface unevenness, and the inner box 8 and the adhesive 18 also have variations in thickness. Therefore, in this embodiment, a spacer 19 is provided between the outer box 7 and the vacuum insulation material 12 to absorb the deflection of the inner box 8 and the dimensional variations of each part and to keep the clearance between the vacuum insulation material 12 and the inner box 8 constant. The spacer 19 is an intermediate member having a certain thickness and has the function of bonding the outer box 7 and the vacuum insulation material 12, and for example, a double-sided tape formed into a sheet shape using polyethylene or the like is used. Note that an adhesive such as hot melt may be used as the spacer 19 as long as the thickness can be maintained. In addition, the spacer 19 does not need to be provided on the entire upper surface of the vacuum insulation material 12, and it is desirable to place it on at least a part or all of the urethane-less area.

さらに、内箱8や発泡断熱材9などは、真空断熱材12と比べて、温度に対して変形し易いので、真空断熱材12の前後および左右を弾性部材で覆って保護し、内箱8などの変形によって真空断熱材12が損傷するのを防止しても良い。なお、真空断熱材12の上下方向については、スペーサ19がクッションとなり、外箱7や内箱8との隙間を埋めつつ真空断熱材12の損傷を防止している。 Furthermore, since the inner box 8 and the foam insulation material 9 are more susceptible to deformation in response to temperature than the vacuum insulation material 12, the vacuum insulation material 12 may be protected by covering the front, back, left and right sides with elastic members to prevent damage to the vacuum insulation material 12 due to deformation of the inner box 8, etc. In addition, in the vertical direction of the vacuum insulation material 12, the spacer 19 acts as a cushion, filling the gap with the outer box 7 and the inner box 8 while preventing damage to the vacuum insulation material 12.

実施例1および実施例2に係る冷蔵庫1は、前述の通り、断熱箱体の部分ウレタンレスを実現しつつも、強度維持を考慮して断熱箱体の前側については、発泡断熱材9が充填されるようにしている。つまり、内箱8の天面、側面および底面のうち、前側領域では真空断熱材12との間隔を広くし、中央領域では真空断熱材12との間隔を狭くしている。このため、前側の内箱8寸法よりも後側の内箱8寸法の方が広くなる部分が存在する。すると、同じ機種の冷蔵庫1を量産する際、複数の内箱8を重ねてストックしようとしても、一方の内箱8が、他方の内箱8の狭い開口部に突き当たって、嵌め込むことが困難である。そこで、本実施例では、内箱8のうち、少なくとも部分ウレタンレスとなる領域、すなわち、前端より後側で寸法が拡大する領域、を蛇腹構造などにより変形可能に形成した。その結果、複数の内箱8を重ねる際には縮むことでストックできるようになり、ウレタン断熱材を発泡させる際には内側から治具で押し当てることで広げることが可能となる。 As described above, the refrigerators 1 according to the first and second embodiments realize a partially urethane-free insulated box, while the front side of the insulated box is filled with the foamed insulation material 9 in consideration of maintaining strength. In other words, the gap between the vacuum insulation material 12 and the top, side, and bottom of the inner box 8 is wider in the front area, and narrower in the center area. For this reason, there is a portion where the dimensions of the inner box 8 at the rear are wider than those at the front. In this case, when mass-producing refrigerators 1 of the same model, even if multiple inner boxes 8 are stacked and stocked, one inner box 8 hits the narrow opening of the other inner box 8, making it difficult to fit them together. Therefore, in this embodiment, at least the area of the inner box 8 that is partially urethane-free, i.e., the area where the dimensions expand from the front end to the rear side, is formed to be deformable by a bellows structure or the like. As a result, when multiple inner boxes 8 are stacked, they can be stored by shrinking, and when foaming the urethane insulation, they can be expanded by pressing them from the inside with a jig.

本発明は前述した各実施例に限定されるものではなく、種々の変形が可能である。例えば、実施例1では天井部の内箱8の下方に天井パネル16を設けたが、天井パネル16を設ける代わりに、庫内灯カバーを後方へ拡大して内箱8の下方を覆うような構成であっても良い。また、前述した実施例は本発明を理解しやすく説明するために例示したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。さらに、ある実施例の構成の一部を他の実施例の構成に置き換えることも可能であり、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることも可能である。 The present invention is not limited to the embodiments described above, and various modifications are possible. For example, in the first embodiment, the ceiling panel 16 is provided below the inner box 8 on the ceiling, but instead of providing the ceiling panel 16, the interior light cover may be expanded rearward to cover the bottom of the inner box 8. It may be a configuration. Further, the embodiments described above are exemplified to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Furthermore, it is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is also possible to add, delete, or replace some of the configurations of each embodiment with other configurations.

<本明細書が包含する技術的思想>
本明細書は、次の技術的思想を包含する。
<Technical Concepts Contained in the Present Specification>
This specification encompasses the following technical ideas.

[付記1-1]
前方が開口した貯蔵室を形成し、内箱及び外箱の間の領域に発泡断熱材が発泡充填され、上下寸法が左右寸法より大きい箱体を備え、
該箱体における左側面及び/又は右側面は、
上下方向に亘って前記発泡断熱材が連続的に発泡充填された前端断熱材を前端に備え、
周囲に比べて発泡断熱材の流動可能な厚みが小さい領域を備え、
前記発泡断熱材よりも高い断熱性能の別の断熱材を備える冷蔵庫。
[Appendix 1-1]
A storage chamber is formed with an opening at the front, and a foam insulation material is foam-filled in a region between the inner box and the outer box, and the vertical dimension is larger than the horizontal dimension.
The left side surface and/or the right side surface of the box body are
A front end insulation material is provided at the front end, in which the foam insulation material is continuously foamed and filled in the vertical direction,
The foam insulation has a smaller flowable thickness than the surrounding area.
A refrigerator equipped with another insulating material having higher insulating performance than the foam insulating material.

[付記1-2]
付記1-1において、
前記流動可能な厚みが小さい領域には、前記内箱が前記外箱側に向かって凹んでいる部分が設けられている冷蔵庫。
[Appendix 1-2]
In Appendix 1-1,
In the region where the flowable thickness is small, a portion where the inner box is recessed toward the outer box is provided.

[付記1-3]
付記1-2において、
前記左側面及び前記右側面は、棚リブ又はレールを備え、
最上段の前記棚リブよりも上側又は最下段の前記レールよりも下側に、前記流動可能な厚みが小さい領域を備える冷蔵庫。
[Appendix 1-3]
In Appendix 1-2,
The left side and the right side include shelf ribs or rails;
The refrigerator is provided with a region with a small flowable thickness above the shelf rib of the uppermost stage or below the rail of the lowermost stage.

[付記1-4]
付記1-2において、
前記左側面及び前記右側面は、棚リブ又はレールを備え、
何れかの前記棚リブ又は前記レールが設けられている上下位置において、該棚リブ又は該レールの前端より前に、前記流動可能な厚みが小さい領域を備える冷蔵庫。
[Appendix 1-4]
In Appendix 1-2,
The left side surface and the right side surface include shelf ribs or rails,
The refrigerator includes the flowable region having a small thickness in front of the front end of the shelf rib or the rail at the upper or lower position where any of the shelf ribs or the rails is provided.

[付記1-5]
付記1-2において、
前記左側面及び前記右側面は、棚リブ又はレールを備え、
前記棚リブ又は前記レールは、合計で複数が上下に並んでおり、
前記棚リブ又は前記レールに上下で挟まれた領域に、前記流動可能な厚みが小さい領域を備える冷蔵庫。
[Appendix 1-5]
In Appendix 1-2,
The left side and the right side include shelf ribs or rails;
A total of multiple shelf ribs or rails are arranged vertically,
The refrigerator has a region with a small flowable thickness in a region sandwiched above and below by the shelf ribs or the rails.

[付記1-6]
付記1-5において、
前記棚リブ又は前記レールのそれぞれに補強が施されている冷蔵庫。
[Appendix 1-6]
In Appendix 1-5,
A refrigerator in which each of the shelf ribs or the rails is reinforced.

[付記1-7]
付記1-2において、
前記左側面及び前記右側面は、棚リブ又はレールを備え、
前記棚リブ又は前記レールの前端から前方に向かって前記前端断熱材に至るまでの範囲は、発泡断熱材の流動可能な厚みが大きく、
前記棚リブ又は前記レールに重なる領域に発泡断熱材が充填されている冷蔵庫。
[Appendix 1-7]
In Appendix 1-2,
The left side and the right side include shelf ribs or rails;
In the range from the front end of the shelf rib or the rail forward to the front end insulation material, the thickness of the foam insulation material that can flow is large,
A refrigerator in which the areas overlapping the shelf ribs or rails are filled with foam insulation.

[付記1-8]
付記1-2において、
前記左側面及び前記右側面には、棚リブ及びレールが設けられておらず、
前記左側面及び前記右側面それぞれの前端から前記内箱の背面までの前後寸法の1/3の位置より後端側に、前記流動可能な厚みが小さい領域を備える冷蔵庫。
[Appendix 1-8]
In Appendix 1-2,
No shelf ribs or rails are provided on the left side surface and the right side surface,
The refrigerator includes the region where the flowable thickness is small on the rear end side from a position that is 1/3 of the front-to-back dimension from the front end of each of the left side surface and the right side surface to the back surface of the inner box.

[付記1-9]
付記1-2において、
前記流動可能な厚みが小さい領域には、前記発泡断熱材が非充填の部分が設けられている冷蔵庫。
[Appendix 1-9]
In Appendix 1-2,
In the refrigerator, the region where the flowable thickness is small is provided with a portion where the foamed heat insulating material is not filled.

[付記1-10]
付記1-2において、
前記流動可能な厚みが小さい領域は、前記別の断熱材の投影面内であって、該別の断熱材の縁よりも内側の領域に形成されている冷蔵庫。
[Appendix 1-10]
In Appendix 1-2,
In the refrigerator, the flowable region having a small thickness is formed in a projected plane of the other heat insulating material and inside an edge of the another heat insulating material.

[付記1-11]
付記1-1乃至付記1-10の何れか一つにおいて、
前記箱体の天面及び/又は底面の前端には、前記前端断熱材と連続して発泡断熱材が充填されている冷蔵庫。
[Appendix 1-11]
In any one of Appendix 1-1 to Appendix 1-10,
In the refrigerator, the front end of the top surface and/or the bottom surface of the box body is filled with a foamed heat insulating material continuously with the front end heat insulating material.

[付記2-1]
外箱と内箱の間に真空断熱材および発泡断熱材を有する箱体を備え、
該箱体の天面において、前記真空断熱材の前後および左右の側面には前記発泡断熱材が位置し、前記真空断熱材の下面の少なくとも一部には前記発泡断熱材が位置しない冷蔵庫。
[Appendix 2-1]
Equipped with a box body having vacuum insulation material and foam insulation material between the outer box and the inner box,
On the top surface of the box, the foam insulation material is located on the front, rear, right and left sides of the vacuum insulation material, and the foam insulation material is not located on at least a part of the lower surface of the vacuum insulation material.

[付記2-2]
付記2-1において、
前記真空断熱材の下面のうち、前側領域および後側領域には前記発泡断熱材が位置する冷蔵庫。
[Appendix 2-2]
In Appendix 2-1,
The refrigerator includes the foam insulation material located in a front region and a rear region of the lower surface of the vacuum insulation material.

[付記2-3]
付記2-1において、
前記天面に庫内灯を有し、
前記真空断熱材の下面のうち、前記発泡断熱材が発泡充填される領域に、前記庫内灯の配線が設けられる冷蔵庫。
[Appendix 2-3]
In Appendix 2-1,
The top surface has an interior light,
A refrigerator in which wiring for the interior light is provided in an area of the underside of the vacuum insulation material where the foam insulation material is foam-filled.

[付記2-4]
付記2-1において、
前記真空断熱材の下面に前記発泡断熱材が位置しない領域では、前記内箱の下方に天井パネルが設けられる冷蔵庫。
[Appendix 2-4]
In Appendix 2-1,
A refrigerator in which a ceiling panel is provided below the inner box in an area where the foam insulation material is not located on the lower surface of the vacuum insulation material.

[付記2-5]
付記2-1において、
前記内箱は、前記真空断熱材の下面側に対して、前記発泡断熱材とは異なる接着剤で固定されている冷蔵庫。
[Appendix 2-5]
In Appendix 2-1,
In the refrigerator, the inner box is fixed to the lower surface side of the vacuum insulation material with an adhesive different from that of the foam insulation material.

[付記2-6]
付記2-5において、
前記真空断熱材の上面と前記外箱との間に、スペーサが設けられている冷蔵庫。
[Appendix 2-6]
In Appendix 2-5,
A refrigerator in which a spacer is provided between the upper surface of the vacuum insulation material and the outer box.

1 冷蔵庫
2 冷蔵室
3 製氷室
4 上段冷凍室
5 下段冷凍室
6 野菜室
7 外箱
8 内箱
9 発泡断熱材
10,11 断熱仕切部
11a ウレタン流入口
11b コード仮収納部
111 上ケース
111a 上面凹部
111b 架橋部
112 下ケース
112a 下面凹部
113 ヒータ
12 真空断熱材
13 棚リブ
14 庫内灯
15 コード
16 天井パネル
17 ネジ
18 接着剤
19 スペーサ
21 レール
22 ヒンジ部
23 補強
REFRIGERATION LIST 1 Refrigerator 2 Refrigeration compartment 3 Ice making compartment 4 Upper freezer compartment 5 Lower freezer compartment 6 Vegetable compartment 7 Outer box 8 Inner box 9 Foam insulation material 10, 11 Insulation partition section 11a Urethane inlet 11b Temporary cord storage section 111 Upper case 111a Upper surface recess 111b Bridge section 112 Lower case 112a Lower surface recess 113 Heater 12 Vacuum insulation material 13 Shelf rib 14 Interior light 15 Cord 16 Ceiling panel 17 Screw 18 Adhesive 19 Spacer 21 Rail 22 Hinge section 23 Reinforcement

Claims (2)

前方が開口した貯蔵室を形成し、内箱及び外箱の間の領域に発泡断熱材が発泡充填され、上下寸法が左右寸法より大きい箱体と、
前記内箱における左側面及び右側面において前記貯蔵室内に配された、棚が保持されるリブと、
前記箱体における前記左側面及び/又は前記右側面の前端部内で、上下方向に亘って前記発泡断熱材が発泡充填されることで形成された前端断熱材と、
該前端断熱材よりも後方において前記内箱が前記外箱側に凹んだ領域と、
該前端断熱材よりも後方であって前記内箱における前記リブよりも前端側と、該前端断熱材よりも後方であって前記リブで上下が挟まれた領域とに、前記凹んだ領域よりも庫内側に突出した領域と、を有し、
前記貯蔵室内における、最上段の前記リブよりも上側に、前記凹んだ領域を備え、
前記外箱の背面に注入口を備え、
前記発泡断熱材よりも高い断熱性能の別の断熱材を備え、
前記凹んだ領域は、前記庫内側に突出した領域に比べて、発泡断熱材の充填厚みが小さい又は非充填である冷蔵庫。
A box body forming a storage chamber with an open front, the area between the inner box and the outer box being filled with foam insulation material, and the vertical dimension being larger than the left and right dimension;
Ribs for holding shelves, which are arranged in the storage chamber on the left and right sides of the inner box;
A front end insulation material formed by foam-filling the foam insulation material vertically within the front end portion of the left side surface and/or the right side surface of the box body;
a region where the inner box is recessed toward the outer box behind the front end insulation material;
A region behind the front end insulation material and on the front end side of the ribs in the inner box , and a region behind the front end insulation material and sandwiched between the upper and lower sides by the ribs , than the recessed region. It has a region protruding into the inside of the refrigerator,
The recessed area is provided above the uppermost rib in the storage chamber,
An injection port is provided on the back of the outer box,
comprising another heat insulating material with higher heat insulating performance than the foam heat insulating material,
The recessed region is filled with a foamed heat insulating material less thickly than the region protruding toward the inside of the refrigerator, or is not filled with the foamed heat insulating material .
前方が開口した貯蔵室を形成し、内箱及び外箱の間の領域に発泡断熱材が発泡充填され、上下寸法が左右寸法より大きい箱体と、
前記内箱における左側面及び右側面において前記貯蔵室内に配された、棚が保持されるリブと、を備え、
前記左側面及び/又は前記右側面には、前端部内で、上下方向に亘って前記発泡断熱材が発泡充填される第一領域において前端断熱材を形成し、
前記第一領域よりも後方側であって最上段の前記リブよりも上側の領域において、前記第一領域よりも前記内箱が前記外箱側に凹んだ領域としての第二領域が形成され、
前記第一領域と前記リブの前端部との間と、前記第一領域よりも後方であって前記リブで上下が挟まれた領域とにおいて、前記第二領域よりも庫内側に突出した領域としての第三領域が形成され
前記外箱の背面に注入口を備え、
前記発泡断熱材よりも高い断熱性能の別の断熱材を備え、
前記第二領域は、前記第三領域に比べて、発泡断熱材の充填厚みが小さい又は非充填である冷蔵庫。
A box body that forms a storage chamber that is open at the front, in which a foam insulation material is foam-filled in a region between the inner box and the outer box, and in which the vertical dimension is greater than the horizontal dimension;
Ribs for supporting a shelf are provided in the storage chamber on the left and right sides of the inner box,
A front end insulating material is formed in a first region in which the foam insulating material is foamed and filled in the vertical direction within the front end portion of the left side surface and/or the right side surface,
A second region is formed in a region rearward of the first region and above the uppermost rib , where the inner box is recessed toward the outer box more than the first region,
Between the first region and the front end of the rib and in a region rearward of the first region and sandwiched between the rib at the top and bottom , a third region is formed as a region protruding toward the inside of the chamber more than the second region ,
The outer box has an injection port on the rear surface thereof,
Another insulating material having a higher insulating performance than the foam insulating material is provided,
A refrigerator in which the second region has a smaller filling thickness of foam insulation material than the third region, or is not filled at all .
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EP21925742.5A EP4293304A1 (en) 2021-02-15 2021-08-26 Refrigerator
PCT/JP2021/031317 WO2022172494A1 (en) 2021-02-15 2021-08-26 Refrigerator
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000039255A (en) 1998-07-27 2000-02-08 Hitachi Ltd Refrigerator
JP2006242439A (en) 2005-03-02 2006-09-14 Hitachi Home & Life Solutions Inc Refrigerator and its manufacturing method
JP2012087993A (en) 2010-10-20 2012-05-10 Toshiba Corp Insulating cabinet
JP2015227762A (en) 2014-06-02 2015-12-17 株式会社東芝 refrigerator
JP2017194271A (en) 2013-06-07 2017-10-26 三菱電機株式会社 refrigerator
US20180299060A1 (en) 2015-10-19 2018-10-18 Samsung Electromics Co., Ltd. Refrigerator and manufacturing method therefor
JP2019207102A (en) 2019-09-04 2019-12-05 東芝ライフスタイル株式会社 Heat insulation box body

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000039255A (en) 1998-07-27 2000-02-08 Hitachi Ltd Refrigerator
JP2006242439A (en) 2005-03-02 2006-09-14 Hitachi Home & Life Solutions Inc Refrigerator and its manufacturing method
JP2012087993A (en) 2010-10-20 2012-05-10 Toshiba Corp Insulating cabinet
JP2017194271A (en) 2013-06-07 2017-10-26 三菱電機株式会社 refrigerator
JP2015227762A (en) 2014-06-02 2015-12-17 株式会社東芝 refrigerator
US20180299060A1 (en) 2015-10-19 2018-10-18 Samsung Electromics Co., Ltd. Refrigerator and manufacturing method therefor
JP2019207102A (en) 2019-09-04 2019-12-05 東芝ライフスタイル株式会社 Heat insulation box body

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