JP7456958B2 - refrigerator - Google Patents

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）。 In order to meet the needs for space saving and large capacity, refrigerator technology is known in which the wall thickness of the refrigerator is made thinner and the internal volume is expanded. The energy-saving performance of refrigerators is mainly achieved through the combined use of two types of insulation materials: vacuum insulation and foam insulation. Therefore, recently, refrigerators have been proposed in which the coverage and thickness of vacuum insulation materials with excellent insulation performance are improved and the thickness of foam insulation materials is reduced. For example, Patent Document 1 discloses a refrigerator in which the area where the foam insulation material does not exist in the back insulation wall is larger than the area where the foam insulation material does not exist in the side insulation wall (claim 1 etc.).

特許第６０２３９４１号公報Patent No. 6023941

特許文献１は、断熱箱体の背面のみを想定したものであり、断熱箱体のその他の面や、貯蔵室を仕切る断熱仕切壁については想定されていない。 Patent Document 1 assumes only the back surface of the heat insulating box, and does not assume other surfaces of the heat insulating box or heat insulating partition walls that partition the storage room.

前記課題に鑑み、本発明の冷蔵庫は、
外箱と内箱の間に真空断熱材および現場発泡された発泡断熱材を有する箱体を備え、
該箱体の天面において、前記真空断熱材の下面の少なくとも一部には前記発泡断熱材が位置せず、
前記内箱は、前記真空断熱材の下面側に対して、接着剤で固定されている冷蔵庫。 In view of the above problems, the refrigerator of the present invention has the following features:
A box body having vacuum insulation material and foam insulation material foamed in-situ between the outer box and the inner box,
On the top surface of the box, the foam insulation material is not located on at least a portion of the bottom surface of the vacuum insulation material,
In the refrigerator, the inner box is fixed with adhesive to the lower surface side of the vacuum insulation material.

また、第２の本発明の冷蔵庫は、
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、前記真空断熱材の下面の少なくとも一部には前記発泡断熱材が位置せず、
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。 Moreover, the refrigerator of the second invention includes:
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 not located on at least a portion of the bottom surface of the vacuum insulation material,
In the refrigerator, a ceiling panel is provided below the inner box in a region where the foam insulation material is not located on the lower surface of the vacuum 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。The perspective view which shows the structure of the heat insulation 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。The rear perspective view of the inner box of the refrigerator. 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。FIG. 5 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。FIG. 5 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. 2 is a partial cross-sectional perspective view showing the vicinity of the internal 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 the refrigerator compartment viewed from above, showing the vacuum insulation material, interior lights, and wiring for the interior lights. 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. 4 is a plan view of the insulating partition section viewed from above. 図１６のＡ－Ａ断面矢視図。FIG. 16 is a sectional view taken along the line AA in FIG. 16; 図１６のＢ－Ｂ断面矢視図。FIG. 16 is a sectional view taken along line BB 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。The perspective view when a heat insulation partition part is seen 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 broken 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. 7 is a diagram showing a schematic configuration of a ceiling portion in Example 2. 断熱構造体の概略の断面図。FIG. 2 is 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 image diagram 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。 The following describes an embodiment of the present invention with reference to the attached 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。 A refrigerator according to Example 1 will be specifically described with reference to the attached drawings. FIG. 1 is a front view showing the external appearance 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 open 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 can be slid, 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。 The refrigerating room 2 is a refrigerating storage room whose interior is kept within the refrigerating temperature range, for example, at an average temperature of about 4°C. The ice making compartment 3, the upper freezing compartment 4, and the lower freezing compartment 5 are frozen storage compartments whose interiors are kept at a freezing temperature range of, for example, about -18° C. on average. The vegetable compartment 6 is a refrigerated storage room whose interior is kept within the refrigerated temperature range, for example, at an average temperature of about 6° C., and is a refrigerated storage room in which drying of food is suppressed 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。 At the rear side of the lower freezer compartment 5, a cooler is arranged to cool the inside of each storage compartment. Although not shown, the cooler, compressor, condenser, and capillary tube are connected to form a refrigeration cycle. A blower for circulating the cold air cooled by the cooler is arranged above the cooler, and a discharge port for discharging the cold air into the storage chamber is formed downstream of the blower. Note that there may be a plurality of coolers, and the arrangement is not limited to the rear side of the lower freezer compartment 5, but may be arranged on the rear side of 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 insulation box>
FIG. 2 is a perspective view showing the structure of the heat insulating box in the refrigerator 1 of this embodiment. As shown in FIG. 2, the heat insulating box has a box shape with a top surface, a bottom surface, both side surfaces, and a back surface, and the front surface is open. The insulating box body includes an outer box 7 made of metal (not shown in FIG. 2) and an inner box 8 made of synthetic resin. The internal space is filled with a foamed heat insulating material 9 such as rigid urethane foam by so-called in-situ foaming to insulate the storage room 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 has a box-like structure including a top plate formed by bending a thin steel plate into a gate shape, a left and right side plate, a back plate made of a separate member, and a bottom plate made of a separate member. has been done. On the other hand, the inner box 8 is formed into a box shape by molding a synthetic resin plate. The top plate and left and right side plates 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 foamed insulation material 9 that is foamed in-situ 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, so it can be used to improve the strength of the insulation box. Useful. The injection method for in-situ foaming of the urethane insulation material, which will become the foam insulation material 9, is to place the refrigerator 1 face down with the back side facing vertically upward, and place the refrigerator 1 at four points on the back side of the outer box 7 of the refrigerator 1, for example. It is injected into the space between the inner box 8 and the outer box 7 through the inlet. The injected urethane insulation material drips onto the front edge of the side of the insulating box, starts foaming from here, runs up the side, wraps around to the back, fills and solidifies.

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。 That is, the foamed heat insulating material 9 is basically injected and foamed between the vacuum heat insulating 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 example, the foamed heat insulating material 9 was not filled or filled with a small amount (partially without urethane) in the portions where the strength was less affected. Specifically, in this example, the urethane flow thickness (gap between the inner box 8 and the vacuum heat insulating material 12, flowable thickness) over the entire area or the entire circumference of the partial urethaneless is made small, for example, less than 6 mm. As a result, instead of unintentionally not being filled with urethane (voids) due to dimensional variations in the vacuum insulation material 12, it becomes possible to intentionally provide areas where urethane is not filled or with a small amount of filling, and as a result, the refrigerator 1 as a whole The injection amount of urethane insulation material can be reduced. For example, the inner box 8 should be tapered to be close to the outer box 7 side to connect the thick part (for example, 8 mm or more) where the foamed heat insulating material 9 is filled and the thin part where urethane is not filled or filled with a small amount. This allows the flow thickness to change continuously. This makes it possible to avoid concentration of stress due to load, which occurs due to sudden changes in rigidity. In addition, pressure loss in the air passage can be reduced in areas where cold air flows. On the other hand, for example, if the inner boxes 8 are connected in a stepwise manner, the internal volume of the storage chamber can be maximized, and a fluid thickness can be ensured, thereby reducing the risk of unfilled urethane at the connection parts.

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。 <Overview of partial urethaneless>
FIG. 3 is a diagram illustrating the filling locations required for strength by analysis. The foamed insulation material 9 is filled and solidified into the insulation space composed of the inner box 8 and the outer box 7 or the vacuum insulation material 12 to ensure the strength of the refrigerator, but it does not contribute equally to the structure in all spaces. I haven't. Figure 3 shows the results of optimizing the urethane portion, which contributes to the rigidity required for refrigerators, using the density method. Since this is a prerequisite for functioning as a refrigerator, a condition is imposed that a load is applied to the rails 21 that support the shelves placed on the shelf ribs 13 and the drawer-type storage compartment containers.

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。 The diagram shows the most effective urethane injection space when 10%, 30%, and 70% urethane injection is performed from the left, based on the result of filling all the insulation spaces. The space required with a small amount of filling is mainly at the front end (opening) of the side part and the front and back center, and it has been shown that this part makes a large contribution to the rigidity. As the filling amount increases, the filling part spreads backward from near the front opening and connects to the center of the side, but it does not spread to the rear side, bottom, top, and rear spaces unless the filling amount increases. , it has been shown that the contribution of urethane to the stiffness in this part of the insulation space is small. It can be seen that even at the center of the side surface, the areas 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 big 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 shown in the left side of FIG. 2, in the refrigerator 1 of this embodiment, a portion of the side surface 81 above the top shelf rib 13 and a portion of the side surface 84 below the bottom rail 21 have a small flow thickness and are not filled or are filled with a small amount of foam insulation material 9. In addition, the flow thickness can also be reduced in a region 82 from the top shelf rib 13 to the bottom rail 21, which is a front-to-back range from the front end insulation material 91 to the shelf rib 13 or rail 21, and a region 83 sandwiched above and below by the shelf rib 13 or rail 21, so that the foam insulation material 9 is not filled or is filled with a small amount. Note that the front end of region 83 is drawn behind the center of the shelf rib 13 or rail 21 in FIG. 2, but it may be extended to the front end of the shelf rib 13 or 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。 For example, in the case of the refrigerator 1 provided with the shelf ribs 13/rails 21 as in this embodiment, the boundary between the front end side and the rear end side can be considered as follows.

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 longitudinal dimension of the shelf rib 13/rail 21. It is preferable to place it in front of the front ends of the shelf ribs 13 and/or rails 21 because it can reduce the flow thickness in areas where the strength is less affected (other than the front ends of the side surfaces, the shelf ribs 13, and the rails 21). If the in-situ foaming method involves injecting the urethane stock solution from the injection port on the back side, the foaming path from the front end of the side surface to the shelf ribs 13/rails 21 is likely to be blocked, and voids are likely to occur in the shelf ribs 13/rails 21. In view of this, in this embodiment, the flow thickness of the region 82 is made as large as that of 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, on the side surface of the refrigerator 1, there are areas filled with the foamed heat insulating material 9 by increasing the flow thickness (for example, the area where the front end heat insulating material 91 is provided), and areas where the flow thickness is reduced and not filled. The ratio of the region filled with a large flow thickness to the sum of the region filled with a small amount is higher on the front end side of the side surface than on the rear end side of the side surface. In FIG. 2, on the left side, each of regions 81-84 can have a small flow thickness, and the remaining regions can have a large flow thickness. In this embodiment, the flow thickness is made small in the regions 81 and 84, and the flow thickness is made large in the remaining regions. The right side can be configured similarly to 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 surface of the refrigerator 1 is provided with the front end insulating material 91, and the foamed insulating material 9 (food support insulating material) is also formed by increasing the thickness of the urethane flow in the projected plane of the shelf ribs 13 and rails 21. Filled. If at least the projected surfaces of the shelf ribs 13 and the rails 21 are filled with the foamed heat insulating material 9, important areas against the food load 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。 To foam food support insulation on-site, for example, the urethane flow thickness can be made large over the entire area from the top shelf rib 13 to the bottom rail 21 so that it is filled with foam insulation 9, or the flow thickness can be made small in the area sandwiched between the shelf rib 13 and rail 21 on the top and bottom, as in area 83, so that it is not filled with foam insulation or is filled only lightly. The former is used in this example. In the latter case, the food support insulation is left in a state of being eaten away by mold, so to speak.

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 details of the top and bottom surfaces will be described later, but as mentioned above, the front end contributes more to the strength, so the flow thickness is set to be larger on the front end than on the rear end. Since the top and bottom surfaces of this embodiment are not provided with shelf ribs and rails, the boundary can be set at, for example, 1/3 or 1/2 of the longitudinal dimension of the refrigerator 1 from the front end. The front end of the top surface and/or the bottom surface can also be filled with foamed heat insulating material 9, and in this case, it can be continuous with the front end heat insulating material 91 on the side surface. In this embodiment, the front ends of the top and bottom surfaces are also filled with foamed heat insulating material 9, and the entire front end of the heat insulating box, that is, 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。 A method for reducing the urethane flow thickness can be achieved, for example, by recessing the inner box 8 toward the outer box 7 side. In this way, the internal volume of the storage room can 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, the foam insulation material 9 It is preferable to reduce the flow thickness to such an extent that no filling occurs. That is, when reducing the flow thickness of the area where the vacuum insulation material 12 is provided (the distance where there is no structure such as the vacuum insulation material 12 in the area between the outer box 7 and the inner box 8), the vacuum insulation material 12 is attached to the inner box 8, the distance between the vacuum heat insulating material 12 and the outer box 7 as a fluid thickness can be, for example, 6 mm or less, preferably 3 mm or less. Further, 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 also be made the same. On the other hand, in the region where the flow thickness is large, the distance between the outer box 7 and the inner box 8 where there is no structure as the flow thickness may be, for example, 8 mm or more, 10 mm or more, 12 mm or more, or 15 mm or more. can. Further, the flow thickness may be approximately the same as that of the front end heat insulating 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 urethaneless>
Next, the specific structure of each part of the heat insulating box in the refrigerator 1 according to this embodiment will be explained. 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 seen from above (with the vacuum insulation material seen through). 6 is a cross-sectional view taken along line AA in FIG. 5, FIG. 7 is a cross-sectional view taken along line BB in FIG. 5, and FIG. 8 is a cross-sectional view taken along line CC in FIG. FIG. 9 is a sectional view taken along the line DD 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 section≫
First, the structure of the top surface (ceiling part) of the heat insulating box will be explained. The front and rear sides of the vacuum heat insulating material 12 in the ceiling are continuously filled with foamed heat insulating material 9, as shown in FIG. Here, regarding the space between the lower surface of the vacuum insulation material 12 and the inner box 8, there is a front region extending from the front end to the interior light 14, and a corner portion 20 from the rear end (a sloped portion on the rear upper side that connects from the back surface to the top surface). The foamed heat insulating material 9 is filled only in the rear region extending over the terminal end, and is not filled in the central region (between the front region and the rear region).

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, the left and right sides of the vacuum heat insulating material 12 in the ceiling are also continuously filled with foamed heat insulating material 9, as shown in FIGS. 7 to 9. Here, as for the space between the lower surface of the vacuum insulation material 12 and the inner box 8, as shown in FIG. 7, in the front area, the foam insulation material 9 is continuously filled from the left end to the right end. As shown in FIGS. 8 and 9, the foam heat insulating material 9 is not filled from the left end to the right end in the central region.

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 (area 85) of the vertically projected lower part of the vacuum heat insulating material 12 in the ceiling partially urethane-free, the amount of urethane heat insulating material to be injected can be reduced. In addition, even if the parts are urethane-free, the foam insulation material 9 is present around the vacuum insulation material 12 in the ceiling (front, rear, left, and right sides), and especially in the front and rear regions, the foam insulation material 9 is vacuum insulated. Since the end portion of the material 12 is held in place from the bottom surface to the side surface, falling of the vacuum heat insulating material 12 and heat bridges are prevented. At the same time, at least the urethane heat insulating material is filled around the interior 14 of the refrigerator placed near the urethane-less, so that the fixing strength of parts related to the interior light 14 can be ensured.

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。 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.

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。 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 foam insulation 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.

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。 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 insulation box, as mentioned above, the urethane insulation material is placed with the back of the refrigerator 1 facing upward, and the urethane insulation material is placed vertically from, for example, four injection ports provided on the back. It is injected toward the front of the refrigerator 1 facing downward. In this embodiment, on the front side (opening) of the refrigerator 1, the fluid flows not only over the entire upper and lower areas of the left and right sides, which correspond to the long sides, but also over the entire left and right sides of the top and bottom surfaces, which correspond to the short sides. It has a large thickness. Therefore, the foamed heat insulating material 9 can be continuously filled all around the opening of the refrigerator 1 (insulating box). In this way, 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 rib≫
Next, the structure of the portion of the heat insulating box where the shelf ribs 13 are formed will be described using FIGS. 8 and 9. On the side surface of the refrigerator 1, a recessed region (region 81) is formed above the uppermost shelf rib 13, where the inner box 8 is recessed toward the outer box 7, so that the flow thickness is small. The recessed region (region 81) is not provided at the front end of the side surface (see FIG. 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 insulation injected through the injection port at 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 insulation starts foaming in the area that will form the front-end insulation, and then fills in the area with a larger flow thickness. For this reason, the foamed insulation 9 fills the area inside the inner box 8, from the top shelf rib 13 to the bottom rail, running up toward the back of the refrigerator 1. In this way, the food support insulation is filled in a continuous manner, starting from the area of the front-end insulation.

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 of the side surface located above the uppermost shelf rib 13 in FIG. 8 (above when the refrigerator 1 is in use), which does not contribute to supporting the shelf rib 13, is set to be small. In this embodiment, the flow thickness is so small that the urethane cannot flow, so the urethane heat insulating material does not run up from the front end of the refrigerator 1 at all.

＜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 area where the gap between the vacuum insulation material 12 and the inner box 8 is small is not filled with the foam insulation material 9, so that the inner box 8 is stuck to the outer box 7 and the vacuum insulation material 12 via the foam insulation material 9. Not talked about. As a result, the inner box 8 sags under its own weight, which is unfavorable in terms of appearance. Therefore, in this embodiment, the urethane heat insulating material is injected and foamed with the synthetic resin ceiling panel 16 attached below the inner box 8 in the urethane-less portion, and the ceiling panel 16 is attached to the ceiling of the refrigerator compartment 2. It forms part of the surface.

＜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 a sloped surface 16a extending downward on the front side, and is fastened to the sloped surface 16a from the outside of the inner box 8 with screws 17 to prevent it from falling off. is difficult for the user to see. In addition, since the head of the screw 17 is finally covered with the foam insulation material 9, not only is the screw 17 prevented from loosening, but also the screw 17 is prevented from coming into contact with the vacuum insulation material 12 when the user removes the screw 17. This prevents the product from being damaged.

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。 In addition, by forming the front side of the ceiling panel 16 into 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 the food in the door pocket. Additionally, compared to a level difference without a slope, there are also advantages in that it is easier to take food in and out, and that the urethane insulation material is easier to flow.

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。 FIG. 12 is a perspective view of the ceiling of the refrigerator compartment 2 when viewed from above, excluding the outer box 7, inner box 8, and vacuum insulation material 12, and FIG. 13 is a perspective view of the ceiling of the refrigerator compartment 2 from the front. FIG. As shown in FIG. 12, a claw portion 16b is formed at the center in the left-right direction on the rear side of the ceiling panel 16, and is locked to the inner box 8. Since the claw portions 16b are formed only in a part of the horizontal width of the ceiling panel 16, which has the same horizontal width as the inner box 8, the workability of assembling the ceiling panel 16 is high.

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。 Both left and right ends of the ceiling panel 16 are only placed on ribs (not shown) extending in the front-rear direction from the side wall of the inner box 8, and are not constrained in the horizontal direction. Furthermore, the rear end of the ceiling panel 16 is only restrained in the vertical direction by the claw portions 16b. Therefore, it is possible to suppress the ceiling panel 16 from being thermally deformed due to changes in the environmental temperature or from being bent due to the foaming pressure of the foamed heat insulating material 9 received via the inner box 8. Note that the ceiling panel 16 may be supported by other methods as long as either the left or right ends or the front or rear ends of the ceiling panel 16 are not restrained in the horizontal direction.

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。 Further, the upper surface of the ceiling panel 16 is formed with a first rib 16c extending in the front-rear direction from the left and right center, and a second rib 16d extending in the left-right direction from the front and rear center, thereby increasing the rigidity of the ceiling panel 16. ing. Note that a plurality of first ribs 16c and second ribs 16d may be formed. In addition, a plurality of reinforcing pieces 16e extending in the left and right direction are formed in line in the front and back direction at both left and right ends of the ceiling panel 16, so that reinforcement pieces 16e are filled between the inner box 8 and the outer box 7 that form the left and right sides. Deformation of the ceiling panel 16 due to the foaming pressure of the foamed heat insulating material 9 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. The ceiling panel 16 is designed so that no load is applied 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 viewed from above, showing the vacuum insulation material 12, the interior light 14, and the wiring (cord 15) for the interior light 14. This is what was displayed. As shown in FIG. 14, the cord 15 pulled out from the interior light 14 passes through the side of the vacuum heat insulating material 12 to reach the rear, further descends on the back side, and is 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 a space is provided on the inner box 8 side or the vacuum insulation material 12 side to avoid the cord 15, foam insulation can be used. It is possible to wire the cord 15 even in a portion where the material 9 is not filled.

＜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。 ≪Top case≫
The upper case 111 faces the lower freezer compartment 5, and as shown in FIG. 15, it has two upper surface recesses 111a on the left and right sides, so it is possible to increase the internal volume of the lower freezer compartment 5. It becomes. Note that the front side of the upper surface recess 111a corresponds to the lower surface recess 112a of the lower case 112 (see FIG. 21) and the front side of the bent portion 12a of the vacuum insulation material 12 located above it (see FIG. 18). , the bottom surface is shallow compared to the rear side. Furthermore, a bridge portion 111b having the same height as the periphery of the upper surface recess 111a is formed in a portion sandwiched between the left and right upper surface recesses 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。 FIG. 16 is a plan view of the heat insulating partition 11 when viewed from above (lower freezer compartment 5 side). 17 is a cross-sectional view taken along line AA in FIG. 16, FIG. 18 is a cross-sectional view taken along line BB in FIG. 16, and FIG. 19 is a cross-sectional view taken along line CC in FIG. , FIG. 20 is a sectional view taken along line DD in FIG. 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, the flow path of the urethane heat insulating material is as shown by the dotted line E in FIG. It becomes a shape that 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。 Further, 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. The foamed heat insulating material 9 is filled as shown in FIG. On the other hand, a portion of the lower surface of the vacuum heat insulating material 12 is covered with double-sided tape (not shown) and is adhered to the lower case 112. Therefore, the foamed heat insulating material 9 is basically not filled between the vacuum heat insulating material 12 and the lower case 112. However, as shown in FIG. 20, below the front side of the bent portion 12a of the vacuum insulation material 12, there is a relatively large gap between the lower case 112 and the lower case 112, except for the area of the lower surface recess 112a formed on the front side of the lower case 112. Since a large gap is created, the foamed heat insulating 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 into an inner wall 11b1 that prevents cords from coming into contact with the vacuum insulation material 12 and damage, and an outer wall 11b2 that prevents cords from slipping out. ing. Further, since a plurality of inner walls 11b1 are provided in the front-rear direction and inner openings 11b3 are formed between them, the urethane heat insulating material 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, and it is possible to draw cords into the temporary cord storage section 11b. Further, since a second outer opening 11b5 is formed on the front side of the outer wall 11b2 so as to face the inner opening 11b3, the urethane heat insulating material injected from the urethane inlet 11a to the heat insulating partition 11 flows into the cord. It is easy to pass through the temporary storage section 11b. Note that since the urethane inlet 11a is formed not only at a position facing the second outer opening 11b5 but also at a position facing the first outer opening 11b4, the urethane heat insulating material flows in from the first outer opening 11b4 as well. . In this way, since the cord temporary storage part 11b is formed at a position facing the urethane inlet 11a to the heat insulation partition part 11, the concave space is filled with the foamed heat insulating material 9, and the heat insulation properties are improved. Secured.

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 part 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。 Moreover, 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 will peel off. Further, the vacuum heat insulating material 12 has variations in thickness, warpage, and surface irregularities, and the inner box 8 and adhesive 18 also inevitably have variations in thickness. Therefore, in this embodiment, in order to absorb the deflection of the inner box 8 and the dimensional variations of each component, and to keep the clearance between the vacuum insulating material 12 and the inner box 8 constant, the gap between the outer box 7 and the vacuum insulating material 12 is A spacer 19 was provided at the. The spacer 19 is an intervening member having a certain thickness and has a function of adhering the outer box 7 and the vacuum insulation material 12. For example, the spacer 19 is made of double-sided tape formed into a sheet of polyethylene or the like. used. Note that an adhesive such as hot melt adhesive may be used as the spacer 19 as long as the thickness can be maintained. Further, the spacer 19 does not need to be provided on the entire upper surface of the vacuum heat insulating material 12, but it is desirable that the spacer 19 be provided on at least a portion or the entirety of the urethane-less region.

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, foam insulation material 9, etc. are more easily deformed due to temperature than the vacuum insulation material 12, the vacuum insulation material 12 is protected by covering the front and rear, left and right sides with elastic members, and the inner box 8 The vacuum insulation material 12 may be prevented from being damaged by such deformation. Note that in the vertical direction of the vacuum insulation material 12, the spacer 19 acts as a cushion, filling the gap between the outer box 7 and the inner box 8 and preventing damage to the vacuum insulation material 12.

実施例１および実施例に係る冷蔵庫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, in Example 1 and the refrigerator 1 according to the example, although the insulating box body is partially urethane-free, the front side of the insulating box body is filled with foamed heat insulating material 9 in consideration of maintaining strength. I try to do that. That is, among the top, side, and bottom surfaces of the inner box 8, the distance from the vacuum heat insulating material 12 is widened in the front region, and the distance from the vacuum heat insulating material 12 is narrowed in the central region. Therefore, there is a portion where the dimensions of the inner box 8 on the rear side are wider than the dimensions of the inner box 8 on the front side. Then, when mass-producing refrigerators 1 of the same model, even if a plurality of inner boxes 8 are stacked and stocked, one inner box 8 hits the narrow opening of the other inner box 8 and is difficult to fit. It is. Therefore, in this embodiment, at least a region of the inner box 8 that is partially urethane-free, that is, a region whose size increases on the rear side from the front end, is formed to be deformable by a bellows structure or the like. As a result, when stacking a plurality of inner boxes 8, they can be stored by shrinking, and when foaming the urethane heat insulating material, they can be expanded by pressing against them with a jig from the inside.

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 above-mentioned embodiments, and various modifications are possible. For example, in embodiment 1, a ceiling panel 16 is provided below the inner box 8 in the ceiling portion, but instead of providing a ceiling panel 16, the interior light cover may be extended backward to cover the lower part of the inner box 8. In addition, the above-mentioned embodiments are illustrated to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all of the configurations described. Furthermore, it is possible to replace 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. It is also possible to add, delete, or replace part of the configuration 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 ideas included in this specification>
This specification includes 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 box body forming a storage chamber with an opening at the front, a foam insulation material being foam-filled in the area between the inner box and the outer box, and the vertical dimension being larger than the left and right dimension,
The left side and/or right side of the box body is
The front end is provided with a front end insulation material in which the foam insulation material is continuously foam-filled in the vertical direction,
with an area where the foam insulation has a smaller flowable thickness than the surrounding area;
A refrigerator comprising another heat insulating material having a higher heat insulating performance than the foam heat 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 surface and the right side surface include shelf ribs or rails,
The refrigerator includes the region where the thickness is small and allows the fluid to flow above the shelf rib on the top shelf or below the rail on the bottom shelf.

［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 surface and the right side surface include shelf ribs or rails,
A total of a plurality of the shelf ribs or the rails are arranged vertically,
The refrigerator includes the region with a small thickness that allows the flow to occur in a region sandwiched between the shelf ribs or the rails above and below.

［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 surface and the right side surface include shelf ribs or rails,
In the range from the front end of the shelf rib or the rail to the front end insulation material, the foam insulation material has a large flowable thickness;
A refrigerator in which a region overlapping with the shelf rib or the rail is filled with foam insulation material.

［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,
The left side surface and the right side surface are not provided with shelf ribs and rails,
The refrigerator is provided with an area with a small flowable thickness on the rear end side of a position that is 1/3 of the front-to-rear dimension from the front end of each of the left side surface and the right side surface to the rear 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,
A refrigerator in which a portion not filled with the foam insulation material is provided in the area having a small flowable thickness.

［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。
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ていてもよい。 [Appendix 2-1]
A box body having a vacuum insulation material and a foam insulation material between an outer box and an inner box is provided,
A refrigerator in which the foam insulation material is not located on at least a portion of the lower surface of the vacuum insulation material on the top surface of the box body.
The foam insulation material may be located on the front, rear, left and right sides 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,
An internal light is provided on the top surface,
A refrigerator in which wiring for the interior light is provided in a region of the lower surface of the vacuum heat insulating material in which the foamed heat insulating 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,
In the refrigerator, a ceiling panel is provided below the inner box in a region 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 top surface of the vacuum insulation material and the outer box.

［付記３－１］
貯蔵室と、
該貯蔵室より低い温度帯の別の貯蔵室と、
前記貯蔵室と前記別の貯蔵室とを仕切る断熱仕切部と、を備え、
前記断熱仕切部は、内部に、発泡断熱材と、該発泡断熱材より高断熱性能の別の断熱材と、を有し、
前記別の断熱材について、前記貯蔵室から前記別の貯蔵室に向かう方向の投影面内に、周囲より発泡断熱材の流動可能厚みが小さい領域が存在する冷蔵庫。 [Appendix 3-1]
storage room and
another storage room having a lower temperature range than the storage room;
comprising a heat insulating partition part that partitions the storage room and the other storage room,
The heat-insulating partition has inside a foam heat-insulating material and another heat-insulating material having a higher heat-insulating performance than the foam heat-insulating material,
Regarding the other heat insulating material, there is a region in a projected plane in a direction from the storage chamber toward the other storage room, where the foamed heat insulating material has a smaller flowable thickness than the surrounding area.

［付記３－２］
付記３－１に記載の冷蔵庫において、
前記流動可能厚みが小さい領域には、前記発泡断熱材が充填されていない部分が設けられている冷蔵庫。 [Appendix 3-2]
In the refrigerator described in Appendix 3-1,
In the refrigerator, the area where the flowable thickness is small is provided with a portion where the foamed heat insulating material is not filled.

［付記３－３］
付記３－１に記載の冷蔵庫において、
前記流動可能厚みが小さい領域において、少なくとも前記断熱仕切部の前記別の貯蔵室に対向する面には、凹部が設けられている冷蔵庫。 [Appendix 3-3]
In the refrigerator described in Appendix 3-1,
In the region where the flowable thickness is small, a recess is provided at least on the surface of the heat insulating partition facing the another storage chamber.

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 1 Refrigerator 2 Refrigerator 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 10, 11 Insulating partition 11a Urethane inlet 11b Cord temporary storage unit 111 Upper case 111a Top 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 (3)

外箱と内箱の間に真空断熱材および現場発泡された発泡断熱材を有する箱体を備え、
該箱体の天面において、前記真空断熱材の下面の一部には前記発泡断熱材が位置せず、
前記箱体の開口部側を前側とし、
前記天面において、前記発泡断熱材は、前記真空断熱材の下面と前記内箱との間では、前側領域と後側領域のみに位置し、前記前側領域と前記後側領域との間である中央領域には位置しておらず、
前記内箱は、前記真空断熱材の下面側に対して、接着剤で固定されている冷蔵庫。 A box body having vacuum insulation material and foam insulation material foamed in-situ between the outer box and the inner box,
On the top surface of the box, the foam insulation material is not located on a part of the bottom surface of the vacuum insulation material,
The opening side of the box body is the front side,
In the top surface, the foam insulation material is located only in the front region and the rear region between the lower surface of the vacuum insulation material and the inner box, and is located between the front region and the rear region. Not located in the central area,
In the refrigerator, the inner box is fixed with adhesive to the lower surface side of the vacuum insulation material. 請求項１に記載の冷蔵庫において、
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。 The refrigerator according to claim 1,
A refrigerator in which a spacer is provided between the top surface of the vacuum insulation material and the outer box. 請求項１に記載の冷蔵庫において、
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ている冷蔵庫。 The refrigerator according to claim 1,
In the refrigerator, a ceiling panel is provided below the inner box in a region where the foam insulation material is not located on the lower surface of the vacuum insulation material.

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