JP2010145002A - Heat insulating case body for refrigerator and method of manufacturing the same - Google Patents

Heat insulating case body for refrigerator and method of manufacturing the same Download PDF

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JP2010145002A
JP2010145002A JP2008322425A JP2008322425A JP2010145002A JP 2010145002 A JP2010145002 A JP 2010145002A JP 2008322425 A JP2008322425 A JP 2008322425A JP 2008322425 A JP2008322425 A JP 2008322425A JP 2010145002 A JP2010145002 A JP 2010145002A
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heat insulating
insulating material
box
vacuum heat
space
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Masaaki Yoshioka
政明 吉岡
Hidekazu Kai
英一 甲斐
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Sharp Corp
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Sharp Corp
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<P>PROBLEM TO BE SOLVED: To provide a heat insulating case body for a refrigerator with excellent cooling performance. <P>SOLUTION: An outer space between an outer case and a vacuum heat insulating material and an inner space between the vacuum heat insulating material and an inner case are completely separated from each other by the vacuum heat insulating material, and the vacuum heat insulating material is installed in the entire region of a space between the outer case and the inner case so as to improve a covering ratio of the vacuum heat insulating material. The outer space between the outer case and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner case are kept well-balanced all the time. Thus, even if foamed heat insulating materials are filled in these spaces, the foamed heat insulating materials are foamed and grown in a well-balanced manner so as to provide the heat insulating case body with favorable quality. Therefore, the refrigerator has excellent cooling performance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、外箱と内箱の中間に真空断熱材を埋設させ、断熱空間に発泡断熱材を注入して発泡形成を行う冷蔵庫の断熱箱体およびその製造方法に関するものである。   The present invention relates to a heat insulating box for a refrigerator in which a vacuum heat insulating material is embedded between an outer box and an inner box, and foamed heat insulating material is injected into a heat insulating space to form foam, and a method for manufacturing the same.

この種の冷蔵庫の断熱箱体は、例えば、特許文献１に示すように、外箱と内箱の中間に真空断熱材を埋設させ、真空断熱材とウレタン発泡断熱材との複合層部分と、ウレタン発泡断熱材のみの単層部分とが存在している。   As shown in Patent Document 1, for example, this type of refrigerator heat insulation box body has a vacuum heat insulating material embedded in the middle between the outer box and the inner box, and a composite layer portion of the vacuum heat insulating material and the urethane foam heat insulating material, There is a single-layer part of only urethane foam insulation.

図５は冷蔵庫本体の背面斜視図である。冷蔵庫本体１の背面板２にはウレタン注入孔５が形成されている。冷蔵庫本体１の下部には庫内を冷却するための冷却装置を収納する機械室３が設けられている。   FIG. 5 is a rear perspective view of the refrigerator body. A urethane injection hole 5 is formed in the back plate 2 of the refrigerator body 1. A machine room 3 for storing a cooling device for cooling the inside of the refrigerator is provided at the lower part of the refrigerator main body 1.

図６は従来の冷蔵庫本体の正面図である。冷蔵庫本体１の両側面には、外箱４と内箱７の中間に真空断熱材６が埋設配置されている。また、冷蔵庫本体の両側面部の間には、それぞれ庫内温度が異なる各庫内を上下に区分けする仕切壁８が設けられている。  FIG. 6 is a front view of a conventional refrigerator main body. On both side surfaces of the refrigerator main body 1, a vacuum heat insulating material 6 is embedded and arranged between the outer box 4 and the inner box 7. In addition, partition walls 8 are provided between the side surfaces of the refrigerator main body to divide the interiors of the respective compartments having different interior temperatures.

図７は図６のＣ−Ｃ断面図である。図に示すように、冷蔵庫本体１の両側面部において、外箱４と内箱７の中間に真空断熱材６が設置され、また、冷蔵庫本体１の背面板２に真空断熱材６が貼り付け設置されている。背面板側の真空断熱材６は、冷蔵庫本体１の両側面部の真空断熱材６のように中間位置に設置されておらず、背面板２に接触して配置されている。また、真空断熱材６は、それぞれ独立しており、断熱箱体の断熱部として、ウレタン発泡断熱材９だけの箇所１５と、ウレタン発泡断熱材９と真空断熱材６とが複合されている箇所１６とに分かれている。   7 is a cross-sectional view taken along the line CC of FIG. As shown in the figure, the vacuum heat insulating material 6 is installed between the outer box 4 and the inner box 7 on both side surfaces of the refrigerator main body 1, and the vacuum heat insulating material 6 is attached to the back plate 2 of the refrigerator main body 1. Has been. The vacuum heat insulating material 6 on the back plate side is not installed at an intermediate position like the vacuum heat insulating materials 6 on both side surfaces of the refrigerator body 1, and is arranged in contact with the back plate 2. Moreover, the vacuum heat insulating material 6 is each independent, and the location 15 only of the urethane foam heat insulating material 9 and the location where the urethane foam heat insulating material 9 and the vacuum heat insulating material 6 are combined as the heat insulating portion of the heat insulating box. It is divided into 16.

図８は図６のＡ−Ａ断面図においてウレタン原液を注入し、ウレタン発泡を行っている状態で示す図である。図８においては、外箱４と内箱７との間の空間部にウレタン原液を注ぎ込まれた後、本体前面部から背面部に向かってウレタン発泡９が開始され、発泡成長している様子を示している。   FIG. 8 is a diagram showing a state in which a urethane stock solution is injected and urethane foaming is performed in the AA cross-sectional view of FIG. In FIG. 8, after the urethane stock solution is poured into the space between the outer box 4 and the inner box 7, urethane foam 9 is started from the front surface of the main body toward the back surface, and the state of foam growth is shown. Show.

外箱４と真空断熱材６の間の空間部１０ａと、真空断熱材６と内箱４の間の空間部１０ｂとでは、ウレタン発泡の流動状態がアンバランスになっている場合、ウレタン発泡９の成長度合いが異なることがある。このように、ウレタン発泡９の成長度合いが異なると、やがて数箇所から発泡先端部が寄り合う集結部において、ウレタン発泡の空洞部が発生したり、あるいは発泡ウレタンの樹脂や泡の強度不足が発生する。これらの原因により、冷却性能の不良になったり、あるいは冷蔵庫本体の外観に様々な変形などのトラブルが発生する。   In the space part 10a between the outer box 4 and the vacuum heat insulating material 6 and the space part 10b between the vacuum heat insulating material 6 and the inner box 4, when the flow state of urethane foam is unbalanced, the urethane foam 9 The degree of growth may vary. In this way, if the degree of growth of the urethane foam 9 is different, a urethane foam cavity or a lack of strength of the urethane foam resin or foam will occur in the gathering section where the foam tip approaches from several places. To do. For these reasons, the cooling performance is poor, or troubles such as various deformations occur in the appearance of the refrigerator body.

図９は図８のＤ範囲の拡大図である。冷蔵庫本体１の背面板２に形成されたウレタン注入孔５（図５参照）に注入ヘッド１３が挿入され、ウレタン原液９が注入されている様子を示している。ウレタン原液９は、一旦、本体１の前面部に落下して滞留し、その後、化学反応により発泡が開始され、外箱４と真空断熱材６との間の空間部１０ａ、および真空断熱材６と内箱７との間の空間部１０ｂに分かれて発泡成長していく。
特開２００７−１９８６２２号公報 FIG. 9 is an enlarged view of a range D in FIG. The state where the injection head 13 is inserted into the urethane injection hole 5 (see FIG. 5) formed in the back plate 2 of the refrigerator body 1 and the urethane stock solution 9 is injected is shown. The urethane stock solution 9 once drops and stays on the front surface portion of the main body 1, and then foaming is started by a chemical reaction. It is divided into a space portion 10b between the inner box 7 and the inner box 7 so as to grow and foam.
JP 2007-198622 A

ところで、特許文献１に示すように、真空断熱材６は、ガスの透過を阻止する多層ラミネート構造のフィルムから成る外被袋と、シリカ・パーライント等の微粉末もしくは無機繊維等からなる芯材とから構成され、芯材を外被に封入した後、外被袋内のガス（空気）を排気し、真空状に減圧してヒートシールにより密封している。   By the way, as shown in Patent Document 1, the vacuum heat insulating material 6 includes a jacket bag made of a film having a multi-layer laminate structure that blocks gas permeation, and a core material made of fine powder such as silica and perlinet or inorganic fibers. After the core material is sealed in the jacket, the gas (air) in the jacket bag is evacuated, vacuumed, and sealed by heat sealing.

この真空断熱材の熱伝導率は、０．００８から０．０００５Ｗ／ｍ・Ｋと断熱性能が非常に優れているため、断熱箱体の壁厚を薄くしても、庫内に侵入してくる熱量を有効的に削減することが可能である。   The heat conductivity of this vacuum heat insulating material is 0.008 to 0.0005 W / m · K, which is very excellent in heat insulation performance, so even if the wall thickness of the heat insulation box is made thin, it can penetrate into the cabinet. It is possible to effectively reduce the amount of heat coming.

したがって、外箱と内箱の中間に埋設する真空断熱材の面積（カバー率）を向上させることが重要であるが、真空断熱材の面積を向上させるには限界がある。これは、外箱と内箱との間の空間部において、真空断熱材とウレタン発泡断熱材との複合層部分（図７の符号１６参照）のみならず、外箱と内箱との間の空間部の構造上、ウレタン発泡断熱材のみの断熱単層（図７の符号１５参照）とが存在し、必ずしも複合層のみにできないからである。   Therefore, it is important to improve the area (cover ratio) of the vacuum heat insulating material embedded between the outer box and the inner box, but there is a limit to improving the area of the vacuum heat insulating material. In the space between the outer box and the inner box, this is not only between the composite layer portion of the vacuum heat insulating material and the urethane foam heat insulating material (see reference numeral 16 in FIG. 7), but also between the outer box and the inner box. This is because, due to the structure of the space portion, there is a heat insulating single layer (see reference numeral 15 in FIG. 7) made only of urethane foam heat insulating material, and it cannot always be a composite layer.

また、冷蔵庫本体１の前面部において、外箱４の折り曲げフランジ４ａの裏面と真空断熱材６の側端面との間には空間部１７があり、冷蔵庫本体の背面板２からウレタン原液９を注入していくと、外箱４の折り曲げフランジ４ａの裏面から発泡成長していくウレタン断熱材が、外箱４と真空断熱材６との間の空間部１０ａと、真空断熱材６と内箱７との間の空間部１０ｂとにバランスよく成長することができないおそれがある。これらのバランスが悪いと、最終的に発泡成長した発泡断熱材９に空洞部や発泡強度不足が発生し、これに起因して、冷却性能や外観不良を起こすといった問題があった。   Moreover, in the front part of the refrigerator main body 1, there is a space 17 between the back surface of the bending flange 4a of the outer box 4 and the side end face of the vacuum heat insulating material 6, and the urethane stock solution 9 is injected from the back plate 2 of the refrigerator main body. As a result, the urethane heat insulating material which is foamed and grown from the back surface of the bending flange 4a of the outer box 4 is a space portion 10a between the outer box 4 and the vacuum heat insulating material 6, and the vacuum heat insulating material 6 and the inner box 7. There is a possibility that it cannot grow in a well-balanced manner in the space portion 10b. When these balances are poor, there is a problem in that the foamed heat insulating material 9 which has finally been foamed and grown has a lack of voids and foam strength, resulting in poor cooling performance and poor appearance.

本発明は、上記に鑑み、冷却性能に優れた冷蔵庫の断熱箱体およびその製造方法の提供を目的としている。   In view of the above, an object of the present invention is to provide a heat insulating box for a refrigerator excellent in cooling performance and a method for manufacturing the same.

上記目的を達成するため、本発明に係る冷蔵庫の断熱箱体は、外箱と、内箱と、前記外箱と内箱との間の空間部に設けられた真空断熱材と、前記真空断熱材を除いて前記空間部に充填される発泡断熱材とを備え、前記外箱と真空断熱材との間の空間部と、前記真空断熱材と内箱との間の空間部とが、前記真空断熱材により完全に分離されたことを特徴とする。   In order to achieve the above object, the heat insulating box of the refrigerator according to the present invention includes an outer box, an inner box, a vacuum heat insulating material provided in a space between the outer box and the inner box, and the vacuum heat insulating material. A foam heat insulating material filled in the space portion excluding the material, a space portion between the outer box and the vacuum heat insulating material, and a space portion between the vacuum heat insulating material and the inner box, It is completely separated by a vacuum heat insulating material.

上記構成によると、外箱と真空断熱材との間の空間部と、前記真空断熱材と内箱との間の空間部とが、前記真空断熱材により完全に分離されているので、真空断熱材が外箱と内箱との空間部の全域に設置され、真空断熱材のカバー率を向上させることができる。   According to the above configuration, the space between the outer box and the vacuum heat insulating material and the space between the vacuum heat insulating material and the inner box are completely separated by the vacuum heat insulating material. A material is installed in the whole space part of an outer box and an inner box, and the coverage of a vacuum heat insulating material can be improved.

しかも、外箱と真空断熱材との間の外側空間部と、真空断熱材と内箱との間の内側空間部とのバランスを常時保つことができ、これらの空間部に発泡断熱材を注入しても発泡断熱材がバランス良く発泡し、従来のような空洞部や発泡強度不足のない断熱部を形成することができる。   Moreover, the balance between the outer space between the outer box and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner box can always be maintained, and foam heat insulating material is injected into these spaces. Even in this case, the foamed heat insulating material foams in a well-balanced manner, and a conventional heat insulating portion without a hollow portion or insufficient foaming strength can be formed.

このような断熱箱体の製造方法は、外箱と内箱との間の空間部に設けられた真空断熱材により、外箱と前記真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とを、前記真空断熱材により完全に分離し、前記内側空間部と外側空間部にそれぞれ別々に発泡断熱材を注入し、発泡成長させる。   Such a heat insulating box manufacturing method includes a vacuum heat insulating material provided in a space portion between an outer box and an inner box, an outer space portion between the outer box and the vacuum heat insulating material, and the vacuum heat insulating material. The inner space portion between the material and the inner box is completely separated by the vacuum heat insulating material, and the foam heat insulating material is separately injected into the inner space portion and the outer space portion, respectively, and foamed and grown.

真空断熱材による空間部の完全分離は、外箱の前面側でも行われる。外箱の前面側と内箱との接合部において、その裏面側と真空断熱材の側端面とが密接される。真空断熱材と接合部との密接は、真空断熱材を接合部に直接接着する以外に、シーラーを使用する。このシーラーは、接合部と接離可能に構成され、内側空間部と外側空間部とのバランス調整を行えるものが好ましい。   The complete separation of the space by the vacuum heat insulating material is also performed on the front side of the outer box. At the junction between the front side of the outer box and the inner box, the back side and the side end face of the vacuum heat insulating material are brought into close contact with each other. For the close contact between the vacuum heat insulating material and the joint, a sealer is used in addition to directly bonding the vacuum heat insulating material to the joint. This sealer is preferably configured so as to be able to come into contact with and separate from the joint portion and to adjust the balance between the inner space portion and the outer space portion.

上記構成によると、前記外箱と内箱との接合部周辺において、外箱と真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とが完全に分離される。   According to the above configuration, the outer space between the outer box and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner box are completely around the joint between the outer box and the inner box. Separated.

また、外箱と、内箱と、前記外箱と内箱との間の空間部に設けられた真空断熱材とを備え、前記空間部は、冷蔵庫本体の両側面部、天面部、底面部および背面部に形成され、これらの空間部に夫々真空断熱材が設置され、これら真空断熱材の各側端縁同士が密着される。   And an outer box, an inner box, and a vacuum heat insulating material provided in a space portion between the outer box and the inner box, the space portion including both side surface portions, a top surface portion, a bottom surface portion of the refrigerator main body, and A vacuum heat insulating material is installed in each of these space portions, and the side edges of these vacuum heat insulating materials are in close contact with each other.

上記構成によると、冷蔵庫本体の両側面部、天面部、底面部および背面部の空間部に夫々真空断熱材が設置されるので、真空断熱材の面積を向上させることができる。   According to the said structure, since a vacuum heat insulating material is each installed in the space part of the both sides | surfaces of a refrigerator main body, a top surface part, a bottom face part, and a back surface part, the area of a vacuum heat insulating material can be improved.

この際、冷蔵庫本体の両側面部、天面部、底面部および背面部の空間部に夫々設置される真空断熱材の各側端縁同士は、真空断熱材の真空破壊あるいは注入する断熱材の通過が発生しないように、シーラーにより接合されるのが好ましい。   At this time, the side edges of the vacuum heat insulating material installed in the space portions of the both side surfaces, top surface, bottom surface and back surface of the refrigerator main body are subject to vacuum breakage of the vacuum heat insulating material or passage of the heat insulating material to be injected. It is preferable to join with a sealer so that it does not occur.

上記構成によると、真空断熱材の各側端縁同士がシーラーにより接合されるので、真空断熱材の真空破壊や注入するウレタン原液などの発泡断熱材の通過を阻止することができ、ウレタン発泡の流動性を安定化させることができる。   According to the above configuration, since the side edges of the vacuum heat insulating material are joined together by the sealer, it is possible to prevent the vacuum heat insulating material from passing through the vacuum heat insulating material and the foamed heat insulating material such as the urethane stock solution to be injected. Fluidity can be stabilized.

また、外箱と真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とに、断熱発泡材をそれぞれ別々に注入させる注入手段を設けることができる。   In addition, it is possible to provide injection means for separately injecting the heat insulating foam material into the outer space portion between the outer box and the vacuum heat insulating material and the inner space portion between the vacuum heat insulating material and the inner box. .

この注入手段としては、冷蔵庫本体の背面側に発泡断熱材を注入する注入口を設け、該注入口に対応して前記真空断熱材又は発泡シーラー部に注入口からの発泡断熱材を内側空間部に導く中間注入孔を形成し、該中間注入孔を開閉自在に閉塞する蓋体を設けることができる。   As the injection means, an injection port for injecting the foam heat insulating material is provided on the back side of the refrigerator main body, and the foam heat insulating material from the injection port is provided in the inner space portion corresponding to the injection port. An intermediate injection hole that leads to the inner injection hole can be formed, and a lid that can be opened and closed is provided.

上記構成によると、外箱と真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とを、それぞれ別々に注入させる注入手段を設けることにより、発泡断熱材の流れがスムーズになり、安定した品質のよい断熱層を形成することができ、断熱部の空洞部や発泡強度不足を解消することができる。   According to the above configuration, by providing injection means for separately injecting the outer space portion between the outer box and the vacuum heat insulating material and the inner space portion between the vacuum heat insulating material and the inner box, foaming is performed. The flow of the heat insulating material becomes smooth, a stable high quality heat insulating layer can be formed, and the cavity portion of the heat insulating portion and insufficient foam strength can be solved.

なお、真空断熱材は、発泡圧によって移動し、内側空間部と外側空間部とのバランスが崩れるのを防止するため、真空断熱材を保持する保持機構を設けることが好ましい。この保持機構は、例えば、内箱と外箱との間で真空断熱材を挟み込む保持部材を配置する構成や、真空断熱材を保持部材を介して内箱及び／又は外箱に接着保持する構成を例示することができる。いずれの場合も、保持材はウレタン原液など断熱発泡材の注入時に原液の流動性を極力阻害しないように配置することが望ましい。   In addition, in order to prevent a vacuum heat insulating material from moving by foaming pressure and breaking the balance of an inner side space part and an outer side space part, it is preferable to provide the holding mechanism holding a vacuum heat insulating material. This holding mechanism is, for example, a configuration in which a holding member that sandwiches the vacuum heat insulating material between the inner box and the outer box, or a configuration in which the vacuum heat insulating material is bonded and held to the inner box and / or the outer box via the holding member. Can be illustrated. In any case, it is desirable that the holding material is disposed so as not to hinder the fluidity of the stock solution as much as possible when the heat insulating foam material such as the urethane stock solution is injected.

上記のような断熱箱体の内部または外部に冷凍サイクルを設けると、冷却性能に優れた冷蔵庫を提供することができる。   If a refrigeration cycle is provided inside or outside the heat insulating box as described above, a refrigerator having excellent cooling performance can be provided.

本発明によると、外箱と真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とが前記真空断熱材により完全に分離されるので、真空断熱材が外箱と内箱との空間部の全域に設置され、真空断熱材のカバー率を向上させることができる。しかも、外箱と真空断熱材との間の外側空間部と、真空断熱材と内箱との間の内側空間部とのバランスを常時保つことができ、これらの空間部に発泡断熱材を注入しても発泡断熱材がバランス良く発泡し、品質のよい断熱箱体を提供することができる。   According to the present invention, the outer space portion between the outer box and the vacuum heat insulating material and the inner space portion between the vacuum heat insulating material and the inner box are completely separated by the vacuum heat insulating material. A material is installed in the whole space part of an outer box and an inner box, and the coverage of a vacuum heat insulating material can be improved. Moreover, the balance between the outer space between the outer box and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner box can always be maintained, and foam heat insulating material is injected into these spaces. Even if foamed heat insulating material foams in a well-balanced manner, it is possible to provide a high-quality heat insulating box.

以下、本発明の実施形態である冷蔵庫の断熱箱体について図面を参照して説明する。なお、図５は本実施形態と従来の形態とで共通する図面であるので、必要に応じて説明に使用する。また、図５〜図９の従来の冷蔵庫における機能部品と同一の機能部品については同一の符号を付して説明する。   Hereinafter, the heat insulation box of the refrigerator which is an embodiment of the present invention is explained with reference to drawings. Note that FIG. 5 is a drawing common to the present embodiment and the conventional embodiment, and is used for explanation as necessary. The same functional parts as those in the conventional refrigerators shown in FIGS.

図１は本発明の実施形態を示す冷蔵庫本体の正面図である。図２は図１のＡ−Ａ断面図、図３および図４は図２のＢ範囲の拡大図である。   FIG. 1 is a front view of a refrigerator body showing an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIGS. 3 and 4 are enlarged views of a range B in FIG.

本実施形態の冷蔵庫は、冷蔵庫本体１の主要部を構成する断熱箱体２０と、断熱箱体の下部機械室３に収容される冷却装置（図示略）とを主要構成部品としている。   The refrigerator of the present embodiment includes a heat insulating box 20 that constitutes a main part of the refrigerator main body 1 and a cooling device (not shown) housed in the lower machine chamber 3 of the heat insulating box.

断熱箱体２０は、外箱４と、内箱７と、前記外箱４と内箱７との間の空間部１０に埋設される真空断熱材６と、該真空断熱材６を除く前記空間部１０に充填される発泡断熱材９とを備えている。   The heat insulation box 20 includes an outer box 4, an inner box 7, a vacuum heat insulating material 6 embedded in a space 10 between the outer box 4 and the inner box 7, and the space excluding the vacuum heat insulating material 6. And a foam heat insulating material 9 filled in the portion 10.

外箱４は、前方に開口を有する鋼板製の板材から構成されている。通常、一枚の鋼板をコ字形に折り曲げ形成して左右側面部４ｂ、４ｃと天面部４ｄとが形成される。背面板２は左右側面部４ｂ、４ｃと天面部４ｄの後縁部に固着される。左右側面部４ｂ、４ｃおよび天面部４ｄの前端部は内側に折り曲げられ、内箱７の前端の内フランジと接合される。外箱４の底部を構成する底板（図示略）は、一枚の鋼板から背面板２と共に折り曲げ形成してもよい。この底板の前端部も内側に折り曲げられ、内箱７の前端の内フランジと接合される。   The outer box 4 is made of a steel plate material having an opening on the front side. Usually, the left and right side surfaces 4b and 4c and the top surface 4d are formed by bending a single steel plate into a U-shape. The back plate 2 is fixed to the left and right side portions 4b and 4c and the rear edge portion of the top surface portion 4d. The front end portions of the left and right side surface portions 4 b and 4 c and the top surface portion 4 d are bent inward and joined to the inner flange at the front end of the inner box 7. The bottom plate (not shown) constituting the bottom of the outer box 4 may be formed by bending together with the back plate 2 from a single steel plate. The front end portion of the bottom plate is also bent inward and joined to the inner flange at the front end of the inner box 7.

内箱７は、硬質樹脂製のものであって、凹状に形成された冷蔵室、冷凍室、野菜室等の複数の貯蔵室が仕切壁８によって上下に仕切られている。   The inner box 7 is made of hard resin, and a plurality of storage chambers such as a refrigerator compartment, a freezer compartment, and a vegetable compartment formed in a concave shape are vertically partitioned by a partition wall 8.

真空断熱材６は、ガスの透過を阻止する多層ラミネート構造のフィルムから成る外被袋６ａと、シリカ・パーライト等の微粉末もしくは無機繊維等からなる芯材６ｂとから構成される。   The vacuum heat insulating material 6 includes an outer bag 6a made of a film having a multilayer laminate structure that prevents gas permeation, and a core material 6b made of fine powder such as silica and pearlite or inorganic fibers.

芯材６ｂは、上記構造以外に、連続気泡合成樹脂フォームからなる板状部材と、無機繊維及び／又は有機繊維からなる繊維状材料の積層体とから構成してもよい。フォームとして連続気泡を用いるのは真空引きする際に、独立気泡のフォームよりは減圧効果が得られやすいからである。   In addition to the above structure, the core material 6b may be composed of a plate-like member made of open-cell synthetic resin foam and a laminate of fibrous materials made of inorganic fibers and / or organic fibers. The reason why open cells are used as the foam is that, when evacuated, a pressure reducing effect can be obtained more easily than a closed cell foam.

外被袋６ａは、ガスバリア性を有し、芯材６ｂを収納して内部を減圧状態に維持できるものであれば、どのようなものを用いてもよい。中でもヒートシール可能なものが好ましい。例えば、ポリアミド系樹脂、アルミ蒸着（ＰＥＴ）ポリエチレンテレフタレート、アルミ箔、そして最内層に高密度ポリエチレン樹脂を配置した多層ラミネート構造のガスバリアフィルムを挙げることができる。   Any outer bag 6a may be used as long as it has a gas barrier property and can accommodate the core material 6b and maintain the inside in a reduced pressure state. Among them, those that can be heat sealed are preferable. Examples thereof include a polyamide-based resin, aluminum vapor-deposited (PET) polyethylene terephthalate, aluminum foil, and a gas barrier film having a multilayer laminate structure in which a high-density polyethylene resin is disposed in the innermost layer.

真空断熱材６の成形は、芯材６ｂを外被袋６ａに封入した後、外被袋６ａ内のガス（空気）を排気し、真空状にしてヒートシールにより密封して成形する。この真空断熱材６の熱伝導率は、０．００８〜０．０００５Ｗ／ｍ・Ｋと断熱性能が非常に優れている。そのため、断熱箱体の壁厚を薄くしても、庫内に侵入してくる熱量を有効に削減することができる。   The vacuum heat insulating material 6 is formed by sealing the core material 6b in the outer bag 6a, then exhausting the gas (air) in the outer bag 6a, forming a vacuum, and sealing by heat sealing. This vacuum heat insulating material 6 has a heat conductivity of 0.008 to 0.0005 W / m · K, which is very excellent in heat insulating performance. Therefore, even if the wall thickness of the heat insulating box is reduced, the amount of heat entering the cabinet can be effectively reduced.

そして、外箱４と内箱７との間に形成される空間部１０は、真空断熱材６によって、外箱４と真空断熱材６と間の外側空間部１０ａと、前記真空断熱材６と内箱７との間の内側空間部１０ｂとが、完全に分離された構造になっている。   And the space part 10 formed between the outer box 4 and the inner box 7 is composed of an outer space part 10 a between the outer box 4 and the vacuum heat insulating material 6 by the vacuum heat insulating material 6, and the vacuum heat insulating material 6. The inner space portion 10b between the inner box 7 and the inner box 7 is completely separated.

また、冷蔵庫本体１の前面側と内箱との接合部において、その裏面と真空断熱材６の側端面とが完全に密接されている。具体的には、外箱４の前面側には内側に折り曲げ形成された折り曲げフランジ４ａが形成されており、この折り曲げフランジ４ａと内箱７の先端のフランジとが接合されて断熱箱体の前面枠部を構成する。このような断熱箱体の前面枠部の裏面、具体的には、外箱４の折り曲げフランジ４ａの裏面と真空断熱材６の側端面とをシーラー等の接合手段により密接させる。   Moreover, in the junction part of the front surface side of the refrigerator main body 1, and an inner box, the back surface and the side end surface of the vacuum heat insulating material 6 are completely closely_contact | adhered. Specifically, a bent flange 4a bent inward is formed on the front side of the outer box 4, and the bent flange 4a and the flange at the tip of the inner box 7 are joined to each other to connect the front of the heat insulating box. Configure the frame. The back surface of the front frame part of such a heat insulation box, specifically, the back surface of the bending flange 4a of the outer box 4 and the side end surface of the vacuum heat insulating material 6 are brought into close contact with a joining means such as a sealer.

図２に外箱４の折り曲げフランジ４ａの裏面と真空断熱材６の側端面とをシーラー２８により接合した状態を示す。シーラー２８は、真空断熱材６の側端面に接着されるが、外箱４の折り曲げフランジ４ａの裏面とは密接させているだけで、接着しない仕様とする。これは、発泡シーラー２８をフランジ４ａに接着させる仕様とした場合、真空断熱材６を取り付ける作業時に位置の不適正が生じたとき、真空断熱材６の取り外しに手間取るからである。発泡シーラー２８とフランジ４ａとを接着しないようにするには、フランジ側に剥離剤を塗布しておくのが良い。   FIG. 2 shows a state in which the back surface of the bending flange 4 a of the outer box 4 and the side end surface of the vacuum heat insulating material 6 are joined by a sealer 28. The sealer 28 is bonded to the side end surface of the vacuum heat insulating material 6, but is only in close contact with the back surface of the bending flange 4 a of the outer box 4, and is not bonded. This is because, in the case where the specification is such that the foam sealer 28 is bonded to the flange 4a, it takes time to remove the vacuum heat insulating material 6 when the position of the vacuum heat insulating material 6 is improper when it is attached. In order not to adhere the foam sealer 28 and the flange 4a, it is preferable to apply a release agent to the flange side.

このように、断熱箱体２０の前面枠部における折り曲げフランジ４ａの裏面と真空断熱材６の側端面とをシーラー２８などの接合手段により密接させると、折り曲げフランジ４ａの周辺における外箱４と真空断熱材６との間の外側空間部１０ａと、真空断熱材６と内箱７との間の内側空間部１０ｂとを完全に分離することができる。   Thus, when the back surface of the bending flange 4a in the front frame portion of the heat insulating box 20 and the side end surface of the vacuum heat insulating material 6 are brought into close contact with each other by a joining means such as a sealer 28, the outer box 4 and the vacuum around the bending flange 4a are vacuumed. The outer space portion 10a between the heat insulating material 6 and the inner space portion 10b between the vacuum heat insulating material 6 and the inner box 7 can be completely separated.

なお、本実施形態では、発泡シーラー２８をフランジ４ａに接着しない態様を例示したが、真空断熱材の位置合わせがスムーズに行える場合には接着してもよいことは勿論である。   In the present embodiment, the embodiment in which the foam sealer 28 is not bonded to the flange 4a has been exemplified. However, it is needless to say that the vacuum sealer may be bonded if the alignment can be performed smoothly.

また、真空断熱材６によって、外箱４と真空断熱材６の外側空間部１０ａと、前記真空断熱材６と内箱７との間の内側空間部１０ｂとを完全に分離するために、外箱４と内箱７の間の空間部１０に配置する真空断熱材６は、図１に示すように、冷蔵庫本体１の両側面部、天面部、底面部および背面部にそれぞれ配置され、さらに各真空断熱材６の側端縁同士が密着される。   Further, in order to completely separate the outer space 4a and the outer space portion 10a of the vacuum heat insulating material 6 and the inner space portion 10b between the vacuum heat insulating material 6 and the inner box 7 by the vacuum heat insulating material 6, As shown in FIG. 1, the vacuum heat insulating material 6 arrange | positioned in the space part 10 between the box 4 and the inner box 7 is each arrange | positioned at the both-sides surface part, the top | upper surface part, the bottom face part, and the back part of the refrigerator main body 1, The side edges of the vacuum heat insulating material 6 are brought into close contact with each other.

各真空断熱材６の側端縁同士の密着構造は、図３に示すように、真空断熱材６の真空破壊あるいは注入する断熱材の通過が発生しないように、軟質発泡シーラー２１により真空断熱材６の側端面同士が貼り付けられている。   As shown in FIG. 3, the close contact structure between the side edges of each vacuum heat insulating material 6 is a vacuum heat insulating material by a soft foam sealer 21 so that vacuum breakage of the vacuum heat insulating material 6 or passage of the heat insulating material to be injected does not occur. 6 side end surfaces are affixed.

このように真空断熱材６により外側空間部１０ａと内側空間部１０ｂとに区画された空間部に発泡断熱材６となるウレタン原液を注入し、発泡成長させる。このとき、発泡圧により真空断熱材６の位置が動かないように保持手段が設けられる。保持手段は、例えば、ウレタンの発泡成長を阻害しないように、外箱４及び内箱７の内側から真空断熱材を保持する保持部材２９から構成される。保持部材２９は、断面Ｈ型の長尺の樹脂部材（例えば、ＡＢＳ樹脂、ポリプロピレンなど）から構成される。保持部材２９は、内箱７の裏面の所定の位置にホットメルトにより貼り付けられる。保持部材２９の内箱と反対側面にもホットメルト剤が塗布され、その上から真空断熱材６が貼り付け保持される。   In this way, the urethane stock solution that becomes the foam heat insulating material 6 is injected into the space portion partitioned by the vacuum heat insulating material 6 into the outer space portion 10a and the inner space portion 10b, and foamed and grown. At this time, holding means is provided so that the position of the vacuum heat insulating material 6 does not move due to the foaming pressure. For example, the holding means includes a holding member 29 that holds the vacuum heat insulating material from the inside of the outer box 4 and the inner box 7 so as not to inhibit the foaming growth of urethane. The holding member 29 is composed of a long resin member having an H-shaped cross section (for example, ABS resin, polypropylene, etc.). The holding member 29 is attached to a predetermined position on the back surface of the inner box 7 by hot melt. A hot melt agent is also applied to the side surface of the holding member 29 opposite to the inner box, and the vacuum heat insulating material 6 is stuck and held thereon.

また、外箱４と真空断熱材６との間の外側空間部１０ａと、真空断熱材６と内箱７との間の内側空間部１０ｂとに、それぞれ断熱発泡材料（ウレタン原液）を注入させる注入口５を分けて発泡断熱形成させる。   Insulating foam material (urethane stock solution) is injected into the outer space 10 a between the outer box 4 and the vacuum heat insulating material 6 and the inner space 10 b between the vacuum heat insulating material 6 and the inner box 7. The injection port 5 is divided to form foam insulation.

図３は真空断熱材６と内箱４の内側空間部１０ｂに発泡断熱材の原液であるウレタン原液を注入している状態を示している。図４は真空断熱材６と外箱４との間の外側空間部１０ａにウレタン原液を注入している状態を示している。   FIG. 3 shows a state in which a urethane stock solution, which is a stock solution of foam heat insulating material, is injected into the vacuum heat insulating material 6 and the inner space 10 b of the inner box 4. FIG. 4 shows a state in which the urethane stock solution is injected into the outer space 10 a between the vacuum heat insulating material 6 and the outer box 4.

図３および図４に示す、いずれの場合も外箱４の背面板２には、ウレタン原液を注入する注入口５が形成され、該注入口５を開閉自在に閉塞する開閉蓋２７が背面板２の裏面側に配置されている。   3 and 4, in any case, the back plate 2 of the outer box 4 is formed with an injection port 5 for injecting a urethane stock solution, and an open / close lid 27 for closing the injection port 5 so as to be freely opened and closed is provided on the back plate. 2 on the back side.

また、この注入口５に対向して真空断熱材６には、前記注入口５に対応して注入口５からのウレタン原液を内側空間部１０ｂに導く中間注入孔２４が形成され、該中間注入孔２４を開閉自在に閉塞する蓋体２５が真空断熱材６の下面側に配置されている。なお、中間注入孔２４は、真空断熱材６に設けたが、軟質シーラー２１部分に形成してもよい。   Further, an intermediate injection hole 24 is formed in the vacuum heat insulating material 6 so as to face the injection port 5 and lead the urethane stock solution from the injection port 5 to the inner space portion 10b corresponding to the injection port 5. A lid 25 that closes the hole 24 so as to be freely opened and closed is disposed on the lower surface side of the vacuum heat insulating material 6. In addition, although the intermediate injection hole 24 was provided in the vacuum heat insulating material 6, you may form it in the soft sealer 21 part.

なお、図示しないが、背面板２の内側には冷却装置（図示略）の放熱パイプが埋設されており、冷凍サイクルの一部を構成するようになっている。   Although not shown, a heat radiating pipe of a cooling device (not shown) is embedded inside the back plate 2 so as to constitute a part of the refrigeration cycle.

次に、断熱箱体の製造方法を説明すると、まず、冷蔵庫本体１の背面板２のウレタン注入口５に注入ヘッド１３を挿入し、注入ヘッド１３から発泡断熱材９の原液であるウレタン原液を注入する。   Next, the manufacturing method of the heat insulation box will be described. First, the injection head 13 is inserted into the urethane injection port 5 of the back plate 2 of the refrigerator body 1, and the urethane stock solution that is the stock solution of the foam insulation 9 is injected from the injection head 13. inject.

この状態では、ウレタン原液を注入する注入ヘッド１３が、背面部の真空断熱材６に予め加工されている中間注入孔２４を貫通して真空断熱材６と内箱７との間の内側空間部１０ｂに到達しており、ウレタン原液９は内側空間部１０ｂに注入される。   In this state, the injection head 13 for injecting the urethane stock solution passes through the intermediate injection hole 24 that has been previously processed in the vacuum heat insulating material 6 on the back surface, and the inner space portion between the vacuum heat insulating material 6 and the inner box 7. 10b, and the urethane stock solution 9 is injected into the inner space 10b.

この注入されたウレタン原液は、冷蔵庫本体１の前面側に落下した後、発泡を開始する。発泡が開始されると、内側空間部１０ｂと外側空間部１０ａとは完全に分離しているので、発泡成長過程で、内側空間部全体がウレタン断熱発泡材９によって充填されることになる。ウレタン原液を注入する際、注入ヘッド１３は図５に示す上側２箇所の注入口５からだけ挿入すればよい。   The injected urethane stock solution starts to foam after falling to the front side of the refrigerator body 1. When foaming is started, the inner space portion 10b and the outer space portion 10a are completely separated, and therefore, the entire inner space portion is filled with the urethane heat insulating foam material 9 in the process of foam growth. When injecting the urethane stock solution, the injection head 13 may be inserted only from the two injection ports 5 on the upper side shown in FIG.

なお、このとき、真空断熱材６は、保持部材２９により内箱４に保持されているが、保持部材２９の内箱への貼り付け方向は、内箱４の高さ方向に対して垂直方向になっている。そのため、背面側の注入口５からウレタン原液を注入したとき、ウレタン原液の流動を阻害しない方向に保持部材２９が貼り付けられているので、発泡成長を阻害するのを防止することができる。   At this time, the vacuum heat insulating material 6 is held in the inner box 4 by the holding member 29, but the attaching direction of the holding member 29 to the inner box is perpendicular to the height direction of the inner box 4. It has become. Therefore, when the urethane stock solution is injected from the inlet 5 on the back side, the holding member 29 is attached in a direction that does not inhibit the flow of the urethane stock solution, so that it is possible to prevent the foam growth from being inhibited.

次に、図４に示すように、注入ヘッド１３を内側空間部１０ｂから外側空間部１０ａに戻し、外側空間部１０ａにウレタン原液を注入する。そうすると、ウレタン原液が冷蔵庫本体１の前面側に落下し、発泡を開始する。発泡が開始されると、内側空間部１０ｂと外側空間部１０ａとは完全に分離しているので、発泡成長過程で外側空間部全体がウレタン断熱発泡材９によって充填されることになる。   Next, as shown in FIG. 4, the injection head 13 is returned from the inner space portion 10b to the outer space portion 10a, and the urethane stock solution is injected into the outer space portion 10a. If it does so, a urethane stock solution will fall to the front side of the refrigerator main body 1, and will start foaming. When foaming is started, the inner space portion 10b and the outer space portion 10a are completely separated, so that the entire outer space portion is filled with the urethane heat insulating foam material 9 during the foaming growth process.

なお、このウレタン原液を注入する際、注入ヘッド１３は図５に示す下側２箇所の注入口５からだけ挿入すればよい。   In addition, when inject | pouring this urethane stock solution, what is necessary is just to insert the injection | pouring head 13 only from the injection | pouring port 5 of two lower sides shown in FIG.

なお、図３および図４に基づいて説明したウレタン原液の注入は、冷蔵庫本体の形状や構造仕様により、ウレタン注入口５と注入ヘッド１３の使い分けが逆の組合せになる場合もある。要するに、良好なウレタン断熱発泡９を満足するためには、自由に使い分ける必要がある。この使い分けにより、ウレタン発泡の流動状態がアンバランスとなっても、安定したウレタン発泡９が可能となる。   In addition, the injection | pouring of the urethane undiluted solution demonstrated based on FIG. 3 and FIG. 4 may be a combination with the reverse use of the urethane inlet 5 and the injection | pouring head 13 by the shape and structural specification of a refrigerator main body. In short, in order to satisfy the good urethane heat insulating foam 9, it is necessary to use them freely. This proper use enables stable urethane foam 9 even if the flow state of urethane foam becomes unbalanced.

従って、従来のように、数箇所から発泡先端部が寄り合う集結部においてウレタン発泡断熱材９の空洞部やウレタン発泡断熱材９の樹脂や泡の強度不足が発生するのを防止することができ、発泡材の流動について制御幅が拡がり、充填性あるいはウレタン原液の使用量の低減が可能となり、より品質の安定した冷蔵庫の断熱箱体を得ることができる。   Therefore, it is possible to prevent the void portion of the urethane foam heat insulating material 9 and the resin of the foamed foam heat insulating material 9 and insufficient strength of the foam from occurring at the concentrating portion where the foam leading ends approach several places as in the past. In addition, the control range of the flow of the foaming material is expanded, the filling property or the amount of the urethane stock solution can be reduced, and the heat insulating box body of the refrigerator with more stable quality can be obtained.

なお、本発明は上記実施形態に限定されるものではなく、本発明の範囲内で多くの修正・変更を加えることができるのは勿論である。例えば、本実施形態では断熱発泡材として発泡ウレタンを例示したが、これに限定されるものではなく、他の発泡樹脂材であってもよいことは勿論である。   In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added within the scope of the present invention. For example, although urethane foam is exemplified as the heat insulating foam material in this embodiment, the present invention is not limited to this, and other foamed resin materials may be used.

本発明の実施形態を示す冷蔵庫本体の正面図The front view of the refrigerator main body which shows embodiment of this invention 図１のＡ−Ａ断面図AA sectional view of FIG. 図２のＢ範囲の拡大図で、内側空間部にウレタン原液を注入している状態を示す図The figure which shows the state which is inject | pouring urethane stock solution into the inner side space part by the enlarged view of the B range of FIG. 図２のＢ範囲の拡大図で、外側空間部にウレタン原液を注入している状態を示す図The figure which shows the state which has inject | poured the urethane stock solution to the outer side space part by the enlarged view of the B range of FIG. 冷蔵庫本体を背面から見た斜視図The perspective view which looked at the refrigerator body from the back 従来の冷蔵庫の断熱箱体の正面図Front view of conventional refrigerator heat insulation box 図６のＣ−Ｃ断面図CC sectional view of FIG. 図６のＣ−Ｃ断面図において、ウレタン原液を注入しウレタン発泡を行っている状態で示す図In CC sectional drawing of FIG. 6, the figure shown in the state which inject | poured urethane stock solution and is performing urethane foaming 図８のＤ範囲の拡大図Enlarged view of range D in FIG.

符号の説明Explanation of symbols

１ 冷蔵庫本体
２ 背面板
３ 機械室
４ 外箱
５ 注入口
６ 真空断熱材
７ 内箱
８ 仕切壁
９ ウレタン発泡
１０ 空間部
１０ａ 外側空間部
１０ｂ 内側空間部
１３ 注入ヘッド
２０ 断熱箱体
２１ 軟質シーラー
２４ 中間注入孔
２５ 蓋体
２７ 蓋体
２８ シーラー
２９ 保持部材 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Back plate 3 Machine room 4 Outer box 5 Inlet 6 Vacuum heat insulating material 7 Inner box 8 Partition wall 9 Urethane foam 10 Space part 10a Outer space part 10b Inner space part 13 Injection head 20 Heat insulation box 21 Soft sealer 24 Intermediate injection hole 25 Lid 27 Lid 28 Sealer 29 Holding member

Claims (8)

外箱と、内箱と、前記外箱と内箱との間の空間部に設けられた真空断熱材と、前記真空断熱材を除いて前記空間部に充填される発泡断熱材とを備え、前記外箱と真空断熱材との間の空間部と、前記真空断熱材と内箱との間の空間部とが、前記真空断熱材により完全に分離されたことを特徴とする冷蔵庫の断熱箱体。   An outer box, an inner box, a vacuum heat insulating material provided in a space portion between the outer box and the inner box, and a foam heat insulating material filled in the space portion excluding the vacuum heat insulating material, A heat insulating box for a refrigerator, wherein the space between the outer box and the vacuum heat insulating material and the space between the vacuum heat insulating material and the inner box are completely separated by the vacuum heat insulating material. body. 外箱の前面側と内箱との接合部において、その裏面と真空断熱材の側端面とが密接され、前記フランジ周辺における外箱と真空断熱材と間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とが完全に分離されたことを特徴とする請求項１に記載の冷蔵庫の断熱箱体。   In the joint between the front side of the outer box and the inner box, the back surface and the side end face of the vacuum heat insulating material are in close contact, and the outer space between the outer box and the vacuum heat insulating material around the flange, and the vacuum heat insulating material The heat insulation box of the refrigerator according to claim 1, wherein an inner space between the box and the inner box is completely separated. 外箱と、内箱と、前記外箱と内箱との間の空間部に設けられた真空断熱材とを備え、前記空間部は、冷蔵庫本体の両側面部、天面部、底面部および背面部に形成され、これらの空間部に夫々真空断熱材が設置され、これら真空断熱材の各側端縁同士が密着されたことを特徴とする請求項１又は２記載の冷蔵庫の断熱箱体。   An outer box, an inner box, and a vacuum heat insulating material provided in a space portion between the outer box and the inner box, wherein the space portion includes both side surfaces, a top surface portion, a bottom surface portion, and a back surface portion of the refrigerator body. The heat insulation box for a refrigerator according to claim 1 or 2, wherein a vacuum heat insulating material is installed in each of the space portions, and each side edge of the vacuum heat insulating material is in close contact with each other. 冷蔵庫本体の両側面部、天面部、底面部および背面部の空間部に夫々設置される真空断熱材の各側端縁同士は、真空断熱材の真空破壊あるいは注入する断熱材の通過が発生しないようにシーラーにより接合されたことを特徴とする請求項１、２又は３に記載の冷蔵庫の断熱箱体。       Each side edge of the vacuum heat insulating material installed in the space on the both sides of the refrigerator body, the top surface, the bottom surface, and the back surface does not cause vacuum breakage of the vacuum heat insulating material or passage of the heat insulating material to be injected. The heat-insulating box for a refrigerator according to claim 1, 2 or 3, wherein the heat-insulating box is joined to the wall with a sealer. 外箱と真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とに、断熱発泡材をそれぞれ別々に注入させる注入手段が設けられたことを特徴とする請求項１〜４のいずれかに記載の冷蔵庫の断熱箱体。     The outer space part between the outer box and the vacuum heat insulating material and the inner space part between the vacuum heat insulating material and the inner box are provided with injection means for injecting the heat insulating foam material separately. The heat insulation box of the refrigerator in any one of Claims 1-4. 冷蔵庫本体の背面側に発泡断熱材を注入する注入口が設けられ、該注入口に対応して前記真空断熱材又はシーラー部に注入口からの発泡断熱材を内側空間部に導く中間注入孔が形成され、該中間注入孔が開閉自在とされたことを特徴とする請求項５に記載の冷蔵庫の断熱箱体。     An inlet for injecting foam insulation is provided on the back side of the refrigerator main body, and an intermediate injection hole for guiding the foam insulation from the inlet to the inner space is provided in the vacuum insulation or sealer corresponding to the injection inlet. 6. The heat insulating box for a refrigerator according to claim 5, wherein the intermediate injection hole is formed and can be freely opened and closed. 請求項１〜６のいずれかに記載の断熱箱体の内部または外部に冷凍サイクルが設けられたことを特徴とする冷蔵庫。   A refrigerator having a refrigeration cycle provided inside or outside the heat insulating box according to any one of claims 1 to 6. 外箱と内箱との間の空間部に設けられた真空断熱材により、外箱と前記真空断熱材との間の外側空間部と、前記真空断熱材と内箱との間の内側空間部とを、前記真空断熱材により完全に分離し、前記内側空間部と外側空間部にそれぞれ別々に発泡断熱材を注入し、発泡成長させることを特徴とする冷蔵庫の断熱箱体の製造方法。   By the vacuum heat insulating material provided in the space between the outer box and the inner box, the outer space between the outer box and the vacuum heat insulating material, and the inner space between the vacuum heat insulating material and the inner box Is completely separated by the vacuum heat insulating material, and a foam heat insulating material is separately injected into the inner space portion and the outer space portion, respectively, and foamed and grown.
JP2008322425A 2008-12-18 2008-12-18 Heat insulating case body for refrigerator and method of manufacturing the same Pending JP2010145002A (en)

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US10712080B2 (en) 2016-04-15 2020-07-14 Whirlpool Corporation Vacuum insulated refrigerator cabinet
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