JP6605090B2 - Vacuum insulation panel - Google Patents

Vacuum insulation panel Download PDF

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JP6605090B2
JP6605090B2 JP2018145091A JP2018145091A JP6605090B2 JP 6605090 B2 JP6605090 B2 JP 6605090B2 JP 2018145091 A JP2018145091 A JP 2018145091A JP 2018145091 A JP2018145091 A JP 2018145091A JP 6605090 B2 JP6605090 B2 JP 6605090B2
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bag body
bag
insulation panel
vacuum
sealed
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JP2018169155A (en
JP2018169155A5 (en
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隆明 吉田
友康 佐伯
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Toshiba Lifestyle Products and Services Corp
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本発明の実施形態は、冷蔵庫に関するものである。   Embodiments of the present invention relate to refrigerators.

従来より、冷蔵庫は、外箱と内箱との間に発泡断熱材を充填したキャビネットにより構成され、そのキャビネットの内部の貯蔵室を形成しているが、更なる断熱性能を向上させて消費電力量を低減させたり、あるいは、キャビネットの壁厚を薄くして庫内容積効率を向上させるため、外箱と内箱との間に充填する発泡断熱材の一部に換えて真空断熱パネルが設けられている。   Conventionally, a refrigerator is composed of a cabinet filled with foam insulation between the outer box and the inner box, and forms a storage room inside the cabinet, but further improves the heat insulation performance and consumes power. In order to reduce the amount or to improve the volumetric efficiency of the cabinet by reducing the wall thickness of the cabinet, a vacuum insulation panel is provided instead of a part of the foam insulation filled between the outer box and the inner box. It has been.

この種の真空断熱パネルは、例えば特許文献１に示すように、芯材と袋体とを備えている。芯材は、細いガラス繊維の綿状物であるグラスウールなどから形成され、袋体は、アルミ箔などを有するラミネートフィルムの袋などで形成されている。この真空断熱パネルは、芯材を袋体に収容し、袋体内を減圧し開口を閉塞し、袋体内を減圧状態に保持して構成されている。   This type of vacuum heat insulation panel includes a core material and a bag as shown in Patent Document 1, for example. The core material is formed of glass wool or the like, which is a cotton-like product of thin glass fibers, and the bag is formed of a laminated film bag having an aluminum foil or the like. This vacuum heat insulation panel is configured by housing a core material in a bag, reducing the pressure inside the bag, closing the opening, and holding the bag in a reduced pressure state.

しかしながら、真空断熱パネルは、パネル製造時やキャビネットへの組み込み時に袋体が損傷してしまうと、外部の空気が袋体の内部に入り込み、断熱性能が著しく悪化する。特に、袋体の損傷によって孔が生じると、その孔が数μｍを下回る程度の微細な孔であっても、外部の空気が袋体の内部へ入り込む量が少なく、袋体に生じた孔の大きさにもよるが例えば数十日から数ヶ月程度の長い時間をかけて徐々に真空断熱パネルの断熱性能が悪化するスローリークが発生し、最終的に袋体の内部が大気圧になって断熱性能が著しく悪化する。そのため、真空断熱パネルの製造時に十分な断熱性能が確認されても、その後、徐々に断熱性能が悪化することから、長期間にわたる断熱性能の信頼性確保が難しいという事情がある。   However, when the bag body is damaged when the panel is manufactured or incorporated into the cabinet, external air enters the inside of the bag body, and the heat insulating performance is significantly deteriorated. In particular, when a hole is generated due to damage to the bag body, even if the hole is a fine hole of less than a few μm, the amount of outside air entering the bag body is small, and the hole generated in the bag body is small. Depending on the size, for example, a slow leak that gradually deteriorates the heat insulation performance of the vacuum insulation panel over a long period of time such as several tens of days to several months occurs, and finally the inside of the bag body becomes atmospheric pressure Thermal insulation performance is significantly deteriorated. Therefore, even if sufficient heat insulation performance is confirmed at the time of manufacturing the vacuum heat insulation panel, the heat insulation performance gradually deteriorates thereafter, and it is difficult to ensure the reliability of the heat insulation performance over a long period of time.

特開２００５−１０６０９４号公報JP 2005-106094 A

そこで、長期間にわたって断熱性能を維持することができる真空断熱パネルを用いた冷蔵庫を提供することを目的とする。   Then, it aims at providing the refrigerator using the vacuum heat insulation panel which can maintain heat insulation performance over a long period of time.

本実施形態の真空断熱パネルは、芯材と、前記芯材を収容した状態で内部が減圧密封される第１袋体と、内部が減圧密封された前記第１袋体を収容した状態で内部が減圧密封される第２袋体とを備え、前記第１袋体と前記第２袋体とが接着層を介して接着されている真空断熱パネルにおいて、前記第1袋体を介して前記芯材に重なるように前記第１袋体を折返し前記第１袋体の外面に重ねられた第１折返し部と、前記第１折返し部を外側から覆うように前記第２袋体を折返した第２折返し部とを備える。 The vacuum heat insulation panel of the present embodiment includes a core material, a first bag body whose inside is sealed under reduced pressure in a state in which the core material is housed, and a first bag body in which the inside is housed under reduced pressure. A vacuum insulation panel comprising: a second bag body that is sealed under reduced pressure, wherein the first bag body and the second bag body are bonded via an adhesive layer ; A first folded portion folded back on the outer surface of the first bag body so as to overlap the material, and a second folded the second bag body so as to cover the first folded portion from the outside. And a folding portion.

第１実施形態に係る冷蔵庫の断面図である。It is sectional drawing of the refrigerator which concerns on 1st Embodiment. 図１に示す冷蔵庫に用いられる真空断熱パネルの要部拡大断面図である。It is a principal part expanded sectional view of the vacuum heat insulation panel used for the refrigerator shown in FIG.

以下、図面に基づいて本発明の一実施形態について説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

本実施形態の冷蔵庫１０は、図１に示すように、鋼板からなる外箱１２と、外箱１２の内部に収納され貯蔵空間を形成する内箱１４との間に断熱空間を設けた冷蔵庫１０の外郭をなすキャビネット１８を備え、このキャビネット１８に不図示の冷凍サイクルなどを組み込んで構成されている。   As shown in FIG. 1, the refrigerator 10 of the present embodiment is a refrigerator 10 in which a heat insulating space is provided between an outer box 12 made of a steel plate and an inner box 14 housed in the outer box 12 and forming a storage space. The cabinet 18 is formed by incorporating a refrigeration cycle (not shown) into the cabinet 18.

断熱空間を形成する外箱１２や内箱１４の断熱空間側には、真空断熱パネル５０が折り曲げられることなく、外箱１２や内箱１４に沿ってほぼ平面状になるように熱可塑性接着剤（ホットメルト）などの接着剤によって貼り付けられている。また、キャビネット１８は、断熱空間で真空断熱パネル５０以外のところに隙間が生じることがある。この隙間には、必要に応じて、ウレタンフォームなどからなる発泡断熱材２０や、冷凍サイクルの一部を構成する放熱パイプなどの冷媒パイプが配設され、外箱１２及び内箱１４が一体化される。特に、放熱パイプなどの冷媒パイプの一部は真空断熱パネル５０の外箱１２側に凹溝を形成し、その凹溝に冷媒パイプを収納することで配置する。そのため、冷蔵庫１０の背面や側面に配した真空断熱パネル５０においては、冷媒パイプと真空断熱パネル５０とが接触する構成となる。   A thermoplastic adhesive is provided on the heat insulation space side of the outer box 12 and the inner box 14 forming the heat insulation space so that the vacuum heat insulation panel 50 is not bent and is substantially flat along the outer box 12 and the inner box 14. (Hot melt) or other adhesive. Further, the cabinet 18 may have a gap in a heat insulating space other than the vacuum heat insulating panel 50. In the gap, a foam heat insulating material 20 made of urethane foam or the like, and a refrigerant pipe such as a heat radiating pipe constituting a part of the refrigeration cycle are disposed in the gap, and the outer box 12 and the inner box 14 are integrated. Is done. In particular, a part of the refrigerant pipe such as a heat radiating pipe is arranged by forming a concave groove on the outer casing 12 side of the vacuum heat insulating panel 50 and housing the refrigerant pipe in the concave groove. Therefore, in the vacuum heat insulation panel 50 arranged on the back surface or side surface of the refrigerator 10, the refrigerant pipe and the vacuum heat insulation panel 50 are in contact with each other.

キャビネット１１の内部に設けられた貯蔵空間は、断熱仕切壁２２によって上方の冷蔵空間と下方の冷凍空間とに区画されている。冷蔵空間は、さらに仕切壁２４によって上下に区画され、上部空間に複数段の載置棚を設けた冷蔵室２６が設けられ、下部空間に引き出し式の収納容器を配置する野菜室２８が設けられている。冷凍空間には、比較的小容積の自動製氷機を備えた製氷室３０と小型冷凍室３２を左右に併設しており、その下方には冷凍室３４が設けられている。   A storage space provided inside the cabinet 11 is partitioned by an insulating partition wall 22 into an upper refrigerated space and a lower refrigerated space. The refrigerated space is further partitioned vertically by a partition wall 24, a refrigerated room 26 having a plurality of stages of mounting shelves is provided in the upper space, and a vegetable room 28 in which a drawer-type storage container is disposed in the lower space. ing. In the freezing space, an ice making room 30 and a small freezing room 32 equipped with a relatively small volume automatic ice making machine are provided on the left and right, and a freezing room 34 is provided below the ice making room 30.

図２に真空断熱パネル５０の端部の断面を示すが、真空断熱パネル５０は、取付けられる壁部の形状に合わせて成形された矩形板状の芯材５２と、芯材５２を収容する第１袋体５４と、芯材５２が収容された第１袋体５４を収容する袋状の第２袋体５６とを備える。   FIG. 2 shows a cross section of the end portion of the vacuum heat insulating panel 50. The vacuum heat insulating panel 50 includes a rectangular plate-shaped core member 52 formed in accordance with the shape of the wall portion to be attached, and a first member that houses the core member 52. One bag body 54 and a bag-like second bag body 56 that houses the first bag body 54 in which the core material 52 is housed are provided.

芯材５２は、断熱性の高い材料、例えば、グラスウールやシリカアルミナなどの無機繊維、又はシリカ粉末などの無機粉体からなる積層材５２ａを、例えばポリエチレンなどの合成樹脂フィルムからなる内袋５２ｂに収納した後、矩形板状に圧縮硬化されて成形されたものである。   The core material 52 is made of a highly heat-insulating material, for example, a laminated material 52a made of inorganic fiber such as glass wool or silica alumina, or inorganic powder such as silica powder, and an inner bag 52b made of a synthetic resin film such as polyethylene. After being stored, it is compression-cured and molded into a rectangular plate shape.

第１袋体５４は、外側から内側に向かって表面保護層５４ａとガスバリア層５４ｂと熱溶着層５４ｃとが順に積層された３層構造の積層フィルムを備える。表面保護層５４ａは、例えばポリエチレンテレフタラートなどの比較的熱に強い合成樹脂から構成されている。ガスバリア層５４ｂは、金属蒸着物（例えばアルミを樹脂フィルム上に蒸着したアルミ蒸着物）、または金属箔（例えばアルミ箔）で形成されている。熱溶着層５４ｃは例えば高密度ポリエチレン等の熱溶着性を有する合成樹脂から構成されている。   The first bag body 54 includes a laminated film having a three-layer structure in which a surface protective layer 54a, a gas barrier layer 54b, and a heat welding layer 54c are sequentially laminated from the outside toward the inside. The surface protective layer 54a is made of a relatively heat-resistant synthetic resin such as polyethylene terephthalate. The gas barrier layer 54b is formed of a metal deposit (eg, an aluminum deposit obtained by depositing aluminum on a resin film) or a metal foil (eg, aluminum foil). The heat welding layer 54c is made of a synthetic resin having a heat welding property such as high density polyethylene.

第１袋体５４は、２枚の積層フィルムの熱溶着層５４ｃを対向して重ね合わせ、周囲部を加圧及び加熱することで、２枚の積層フィルムが熱溶着され密封することにより開口部を有する袋状に形成されている。第１袋体５４は、開口部から芯材５２を内部に収容した後、内部が真空排気され減圧された状態で第１袋体５４の開口部が熱溶着により密閉されている。   The first bag body 54 is formed by facing and laminating the heat-bonding layers 54c of the two laminated films facing each other, and pressurizing and heating the peripheral portion, whereby the two laminated films are heat-welded and sealed. It is formed in the bag shape which has. In the first bag body 54, after the core material 52 is accommodated in the opening, the opening of the first bag body 54 is sealed by heat welding in a state where the inside is evacuated and decompressed.

第１袋体５４の周縁部は、２枚の積層フィルムを熱溶着するために芯材５２から周囲にはみ出しており、このはみ出した部分が芯材５２の縁部において折り曲げられ、一方の積層フィルムに重ね合わせた折返し部６２をなしている。   The peripheral portion of the first bag body 54 protrudes from the core material 52 in order to thermally weld two laminated films, and the protruding portion is bent at the edge of the core material 52, and one laminated film The folded portion 62 overlapped with each other is formed.

第２袋体５６は、外側から内側に向かって表面保護層５６ａとガスバリア層５６ｂと熱溶着層５６ｃとが順に積層された第１袋体５４を構成する積層フィルムと同一構成の積層フィルムを備え、２枚の積層フィルムの熱溶着層５６ｃを対向して重ね合わせ、周囲部を加圧及び加熱することで、２枚の積層フィルムが熱溶着され密封することにより開口部を有する袋状に形成されている。   The second bag 56 includes a laminated film having the same configuration as the laminated film constituting the first bag 54 in which the surface protective layer 56a, the gas barrier layer 56b, and the heat welding layer 56c are sequentially laminated from the outside toward the inside. Two laminated films heat-sealed layer 56c are opposed to each other and the surrounding portion is pressurized and heated to form a bag-like shape having two openings by heat-sealing and sealing the two laminated films. Has been.

第２袋体５６は、芯材５２を収容した状態で内部が減圧密閉された第１袋体５４を収容した後、内部が真空排気され減圧された状態で第２袋体５６の開口部が熱溶着により密閉されている。   The second bag body 56 accommodates the first bag body 54 whose inside is decompressed and sealed in the state where the core material 52 is housed, and then the opening of the second bag body 56 is evacuated and decompressed inside. Sealed by heat welding.

第２袋体５６の周縁部は、２枚の積層フィルムを熱溶着するために芯材５２を収容した第１袋体５４から周囲にはみ出しており、このはみ出した部分が第１袋体５４の縁部において折り曲げられ、一方の積層フィルムに重ね合わせた折返し部６４をなしている。本実施形態では、第２袋体５６に設けられた折返し部６４は、第１袋体５４に設けられた折返し部６２を外側から覆うように折返し部６２に重ね合わせられている。   The peripheral portion of the second bag body 56 protrudes from the first bag body 54 containing the core material 52 in order to thermally weld the two laminated films, and the protruding portion is the portion of the first bag body 54. The folded portion 64 is folded at the edge and overlapped with one laminated film. In the present embodiment, the folded portion 64 provided in the second bag body 56 is overlapped with the folded portion 62 so as to cover the folded portion 62 provided in the first bag body 54 from the outside.

第２袋体５６は、その内面に位置する熱溶着層５６ｃが、第２袋体５６の内部に収容された第１袋体５４の外面に位置する表面保護層５４ａと接着層５８によって接着固定されている。この時、接着層５８は折返し部６２と及び６４とは重ならない領域に設けられている。   The second bag 56 has a heat-welded layer 56 c located on the inner surface thereof bonded and fixed by an adhesive layer 58 and a surface protective layer 54 a located on the outer surface of the first bag 54 accommodated inside the second bag 56. Has been. At this time, the adhesive layer 58 is provided in a region where the folded portions 62 and 64 do not overlap.

具体的には、第２袋体５６の内部に第１袋体５４を収容する際に、第１袋体５４と第２袋体５６との間に、オレフィン系やポリエステル系やウレタン系の熱可塑性接着剤（ホットメルト）を含む熱接着性シートを第１袋体を挟むように２枚挿入し、上記のように内部を減圧した状態で第２袋体５６の開口部を熱溶着により密閉した後、第２袋体５６を加熱することにより、第１袋体５４と第２袋体５６とを接着する接着層５８を形成することができる。
なお、接着層５８は、第１袋体５４と第２袋体５６の対向する面の全てに設ける必要は無く、第２袋体５６を第１袋体５４に固定することができれば部分的に設けられても良い。 Specifically, when the first bag body 54 is accommodated in the second bag body 56, an olefin-based, polyester-based, or urethane-based heat is interposed between the first bag body 54 and the second bag body 56. Two thermal adhesive sheets containing a plastic adhesive (hot melt) are inserted so as to sandwich the first bag body, and the opening of the second bag body 56 is sealed by thermal welding in a state where the inside is decompressed as described above. After that, by heating the second bag body 56, the adhesive layer 58 for bonding the first bag body 54 and the second bag body 56 can be formed.
Note that the adhesive layer 58 does not have to be provided on all of the opposing surfaces of the first bag body 54 and the second bag body 56, and partially if the second bag body 56 can be fixed to the first bag body 54. It may be provided.

また、第１袋体５４と第２袋体５６を接着する接着層５８は、上記のような熱接着性シートに限られず、例えば、第２袋体５６の開口部を密閉した後に、ヒータ熱溶着や、超音波溶着や、レーザ溶着や、高周波溶着などによって形成してもよい。   Further, the adhesive layer 58 that bonds the first bag body 54 and the second bag body 56 is not limited to the above-described heat-adhesive sheet. For example, after the opening of the second bag body 56 is sealed, the heater heat You may form by welding, ultrasonic welding, laser welding, high frequency welding, etc.

また、本実施形態では、第２袋体５６の内部に第１袋体５４を収容した後、両面接着テープにより第１袋体５４と第２袋体５６の接着をし、その後、内部を減圧した状態で第２袋体５６の開口部を密閉することで、第１袋体５４を収容した第２袋体５６の内部を減圧密閉しつつ、第１袋体５４と第２袋体５６との間に接着層５８を設けてもよい。   Moreover, in this embodiment, after accommodating the 1st bag body 54 inside the 2nd bag body 56, the 1st bag body 54 and the 2nd bag body 56 are adhere | attached with a double-sided adhesive tape, and the inside is pressure-reduced after that. The first bag body 54 and the second bag body 56 are sealed while the inside of the second bag body 56 containing the first bag body 54 is sealed under reduced pressure by sealing the opening of the second bag body 56 in the state of An adhesive layer 58 may be provided therebetween.

また、本実施形態では、必要に応じて第１袋体５４と第２袋体５６との接着時に第２袋体５６を外側から第１袋体５４との間に設けられた接着層５８に向けて押圧してもよい。   In the present embodiment, the second bag body 56 is attached to the adhesive layer 58 provided between the first bag body 54 from the outside when the first bag body 54 and the second bag body 56 are bonded as necessary. You may press toward.

また、上記した本実施形態では、第１袋体５４を形成する積層フィルムと第２袋体５６を形成する積層フィルムを同一のフィルムで構成する場合について説明したが、例えば、第１袋体５４の外面に位置し第２袋体５６との接着面をなす表面保護層５４ａと、第２袋体５６の内面に位置し第１袋体５４との接着面をなす熱溶着層５６ｃとを同じ材料で構成したり、接着面をなす第１袋体５４の表面保護層５４ａや第２袋体５６の熱溶着層５６ｃにコロナ処理を施してもよく、これにより、第１袋体５４と第２袋体５６との接着性を向上させることができる。   Moreover, in this embodiment mentioned above, although the laminated film which forms the 1st bag body 54, and the laminated film which forms the 2nd bag body 56 were comprised with the same film, the 1st bag body 54 was mentioned, for example. The surface protective layer 54a that is located on the outer surface of the second bag body 56 and forms the bonding surface with the second bag body 56 is the same as the heat-welding layer 56c that is located on the inner surface of the second bag body 56 and forms the bonding surface with the first bag body 54. Corona treatment may be applied to the surface protective layer 54a of the first bag body 54 or the heat-welded layer 56c of the second bag body 56, which is made of a material or forms an adhesive surface. Adhesiveness with two bag bodies 56 can be improved.

特に、ヒータ熱溶着や、超音波溶着や、レーザ溶着や、高周波溶着などによって第１袋体５４と第２袋体５６とを接着する場合、第１袋体５４を形成する積層フィルムの表面保護層５４ａを熱溶着層５４ｃ、５６ｃと同じ合成樹脂で構成することで溶着しやすくなり、第１袋体５４と第２袋体５６との接着性を向上させることができる。   In particular, when the first bag body 54 and the second bag body 56 are bonded by heater heat welding, ultrasonic welding, laser welding, high-frequency welding, or the like, the surface protection of the laminated film forming the first bag body 54 is performed. It becomes easy to weld by comprising the layer 54a with the same synthetic resin as the heat welding layers 54c and 56c, and the adhesiveness of the 1st bag body 54 and the 2nd bag body 56 can be improved.

以上のような本実施形態の冷蔵庫１０では、キャビネット１８の断熱空間に設けられた真空断熱パネル５０が、芯材５２を収容する第１袋体５４と、第１袋体５４を収容する第２袋体５６とを備え、第１袋体５４及び第２袋体５６の内部が減圧密封されており、第１袋体５４及び第２袋体５６によって芯材５２の周りを２重に減圧密封しているため、いずれか一方の袋体に損傷があっても、外部の空気が袋体の内部に入り込むことが無く、断熱性能が悪化することがない。   In the refrigerator 10 of the present embodiment as described above, the vacuum heat insulation panel 50 provided in the heat insulation space of the cabinet 18 includes the first bag body 54 that houses the core material 52 and the second bag body that houses the first bag body 54. The first bag body 54 and the second bag body 56 are sealed under reduced pressure, and the first bag body 54 and the second bag body 56 are double-pressure sealed around the core material 52. Therefore, even if any one of the bags is damaged, the outside air does not enter the inside of the bag and the heat insulation performance is not deteriorated.

また、真空断熱パネル５０は、その外表面を構成する第２袋体５６が外箱１２や内箱１６に接着剤や発泡断熱材２０によって固定されることで、比較的剛性の高い芯材５２がキャビネット１８と一体化されキャビネット１８の剛性を高めることができる。   The vacuum heat insulating panel 50 has a relatively stiff core material 52 by fixing the second bag 56 constituting the outer surface of the vacuum heat insulating panel 50 to the outer box 12 or the inner box 16 with an adhesive or the foam heat insulating material 20. Can be integrated with the cabinet 18 to increase the rigidity of the cabinet 18.

しかも、第２袋体５６が第１袋体５４に固定されていない場合、第２袋体５６が損傷し第２袋体５６の内側に外部の空気が入り込むと、第１袋体５４に収容された芯材５２が外箱１２や内箱１６に固定されなくなり、キャビネット１８の剛性が低下するおそれがあるが、本実施形態では、第１袋体５４と第２袋体５６とが互いに接着されているため、仮に第２袋体５６の内側に外部の空気が入り込むことがあっても、第１袋体５４やその内側に存在する芯材５２がキャビネット１８と一体化された状態を維持することができ、キャビネット１８の剛性が低下することがない。   In addition, when the second bag body 56 is not fixed to the first bag body 54, if the second bag body 56 is damaged and external air enters inside the second bag body 56, the second bag body 56 is accommodated in the first bag body 54. However, in this embodiment, the first bag body 54 and the second bag body 56 are bonded to each other. Therefore, even if external air may enter the inside of the second bag body 56, the state in which the first bag body 54 and the core material 52 existing inside thereof are integrated with the cabinet 18 is maintained. The rigidity of the cabinet 18 does not decrease.

接着層５８は折返し部６２、６４とは重ならない領域に設けられているため、真空断熱パネル５０において折返し部６２、６４と接着層５８が重なることで部分的に厚みが増してしまうことを防止できる。   Since the adhesive layer 58 is provided in an area that does not overlap with the folded portions 62 and 64, the thickness of the folded portion 62 and 64 and the adhesive layer 58 in the vacuum heat insulating panel 50 is prevented from partially increasing. it can.

冷媒パイプのような真空断熱パネルと接触し、真空断熱パネルを損傷させる危険性のある部材と直接接触する冷蔵庫１０の背面や側面に配する真空断熱パネルについては２重に減圧密閉した真空断熱パネルを採用し、天井面や底面といった貼り付けを行う際に真空断熱パネルを大きく折り曲げる必要がある箇所に配する真空断熱パネルについては１重の真空断熱パネルを使用する。これにより、全ての真空断熱パネルを２重に減圧密封したものを使用する場合に比べて冷蔵庫の製造コストを低く抑えることができる。   The vacuum insulation panel placed on the back or side of the refrigerator 10 that is in contact with a vacuum insulation panel such as a refrigerant pipe and is in direct contact with a member that may damage the vacuum insulation panel is vacuum-sealed with a double vacuum seal. A single vacuum heat insulation panel is used for the vacuum heat insulation panel disposed at a place where the vacuum heat insulation panel needs to be largely bent when attaching the ceiling surface or the bottom surface. Thereby, the manufacturing cost of a refrigerator can be restrained low compared with the case where what vacuum-sealed all the vacuum heat insulation panels was used twice.

また、冷蔵庫１０の背面や側面といった天井面や底面に比べて１枚の真空断熱パネルのサイズが大きいものを２重に減圧密封することで、より損傷を起こしやすいサイズの大きな真空断熱パネルについての損傷をより確実に防止できる。   In addition, a vacuum insulation panel having a large size that is more likely to be damaged is sealed by double-pressure-sealing a vacuum insulation panel that is larger in size than the ceiling or bottom surface such as the back or side of the refrigerator 10. Damage can be prevented more reliably.

以上、本発明の実施形態を説明したが、これらの実施形態は例として提示したものであり、発明の範囲を限定することを意図していない。これらの実施形態は、その他の様々な形態で実施されることが可能であり、発明の趣旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これらの実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。   As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

１０…冷蔵庫、１２…外箱、１４…内箱、１８…キャビネット、２０…発泡断熱材、２２…断熱仕切、５０…真空断熱パネル、５２…芯材、５２ａ…積層材、５２ｂ…内袋、５４…第１袋体、５４ａ…表面保護層、５４ｂ…ガスバリア層、５４ｃ…溶着層、５６…第２袋体、５６ａ…表面保護層、５６ｂ…ガスバリア層、５６ｃ…溶着層、５８…接着層、６２…折返し部、６４…折返し部 DESCRIPTION OF SYMBOLS 10 ... Refrigerator, 12 ... Outer box, 14 ... Inner box, 18 ... Cabinet, 20 ... Foam insulation, 22 ... Heat insulation partition, 50 ... Vacuum insulation panel, 52 ... Core material, 52a ... Laminate, 52b ... Inner bag, 54 ... first bag, 54a ... surface protective layer, 54b ... gas barrier layer, 54c ... welded layer, 56 ... second bag, 56a ... surface protective layer, 56b ... gas barrier layer, 56c ... welded layer, 58 ... adhesive layer 62 ... turn-up part, 64 ... turn-up part

Claims (4)

芯材と、前記芯材を収容した状態で内部が減圧密封される第１袋体と、内部が減圧密封された前記第１袋体を収容した状態で内部が減圧密封される第２袋体とを備え、前記第１袋体と前記第２袋体とが接着層を介して接着されている真空断熱パネルにおいて、
前記第1袋体を介して前記芯材に重なるように前記第１袋体を折返し前記第１袋体の外面に重ねられた第１折返し部と、前記第１折返し部を外側から覆うように前記第２袋体を折返した第２折返し部とを備える真空断熱パネル。 A core, a first bag whose inside is sealed under reduced pressure in a state where the core is accommodated, and a second bag whose inside is decompressed and sealed while containing the first bag whose inside is sealed under reduced pressure In the vacuum insulation panel in which the first bag body and the second bag body are bonded via an adhesive layer ,
The first bag body is folded back so as to overlap the core material via the first bag body, and the first folded part is overlapped on the outer surface of the first bag body, and the first folded part is covered from the outside. A vacuum heat insulation panel comprising: a second folded portion obtained by folding the second bag body . 芯材と、前記芯材を収容した状態で内部が減圧密封される第１袋体と、内部が減圧密封された前記第１袋体を収容した状態で内部が減圧密封される第２袋体とを備え、前記第１袋体と前記第２袋体とが接着層を介して接着されている真空断熱パネルにおいて、  A core, a first bag whose inside is sealed under reduced pressure in a state where the core is accommodated, and a second bag whose inside is decompressed and sealed while containing the first bag whose inside is sealed under reduced pressure In the vacuum insulation panel in which the first bag body and the second bag body are bonded via an adhesive layer,
前記第１袋体を折り返す折返し部を備え、  A folding portion for folding the first bag body;
前記接着層を折返し部とは重ならない位置に設けた真空断熱パネル。  A vacuum heat insulating panel in which the adhesive layer is provided at a position that does not overlap the folded portion. ホットメルト型の熱接着性シートにより前記第１袋体と前記第２袋体が接着されている請求項１又は２に記載の真空断熱パネル。  The vacuum heat insulation panel according to claim 1 or 2 with which said 1st bag and said 2nd bag are pasted up with a hot-melt type heat adhesive sheet. 前記第1袋体は、外側に設けられた表面保護層を含む複数の層を積層してなり、
前記表面保護層が、熱溶着可能な材料で構成されている請求項１〜３のいずれか1項に記載の真空断熱パネル。 The first bag is formed by laminating a plurality of layers including a surface protective layer provided on the outside,
The vacuum thermal insulation panel according to any one of claims 1 to 3, wherein the surface protective layer is made of a heat-weldable material.
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