JP5899395B2 - Heat insulation box - Google Patents
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- JP5899395B2 JP5899395B2 JP2011192683A JP2011192683A JP5899395B2 JP 5899395 B2 JP5899395 B2 JP 5899395B2 JP 2011192683 A JP2011192683 A JP 2011192683A JP 2011192683 A JP2011192683 A JP 2011192683A JP 5899395 B2 JP5899395 B2 JP 5899395B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/10—Insulation with respect to heat
- F25D2201/14—Insulation with respect to heat using subatmospheric pressure
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Description
本発明は、真空断熱材とウレタン発泡断熱材とを、外箱と内箱との間に有する断熱箱体に関するものである。 The present invention relates to a heat insulating box having a vacuum heat insulating material and a urethane foam heat insulating material between an outer box and an inner box.
近年、省エネ技術に注目が集まり、真空断熱材を搭載した冷蔵庫や自動販売機等様々な製品が発売され、好評を得ている。この真空断熱材は、グラスウール等の芯材と吸着剤とをガスバリア性の外被材内に減圧密封したものであり、従来のウレタンフォームと比較して、約２０倍の断熱性能を有するため、外形寸法の割に庫内容積が大きいといった冷蔵庫の顧客要望を満たしつつ省エネを図ることができる有力な手段として注目されている。 In recent years, energy-saving technology has attracted attention, and various products such as refrigerators and vending machines equipped with vacuum insulation have been released and gained popularity. This vacuum heat insulating material is one in which a core material such as glass wool and an adsorbent are sealed under reduced pressure in a gas barrier outer covering material, and has a heat insulating performance about 20 times that of a conventional urethane foam, It has been attracting attention as an effective means to save energy while satisfying customer demands for refrigerators that have a large internal volume for their external dimensions.
しかしながら、真空断熱材を搭載した冷蔵庫のリサイクルには、まだまだ課題がある。真空断熱材は、グラスウール等の多孔質の芯材を吸着剤と共に、袋状のアルミラミネートフィルム内に挿入して、減圧密封したものが主流であるため、従来の冷蔵庫リサイクルシステムと同様に、冷蔵庫の断熱箱体をそのまま破砕すると、破砕後にウレタンフォームとグラスウールが混合してしまい、ウレタンの固形化が困難になり、ウレタンの再資源化が難しくなる。 However, there are still problems in recycling refrigerators equipped with vacuum insulation. Vacuum insulation is mainly made by inserting a porous core material such as glass wool together with an adsorbent into a bag-like aluminum laminate film and sealing it under reduced pressure. Therefore, as with conventional refrigerator recycling systems, If the heat insulation box is crushed as it is, urethane foam and glass wool are mixed after crushing, making it difficult to solidify urethane and making it difficult to recycle urethane.
よって、好ましい真空断熱材搭載冷蔵庫のリサイクル方法としては、破砕前に真空断熱材を取り出す必要がある。 Therefore, as a preferable recycling method of the refrigerator equipped with a vacuum heat insulating material, it is necessary to take out the vacuum heat insulating material before crushing.
そこで、冷蔵庫における真空断熱材の脱着を容易にする方法として、発泡断熱材と密着しない所に、しかも外部より容易に脱着できるところに真空断熱材を適用することで、真空断熱材単体でのサービス交換を容易にし、従来同様断熱材の薄壁化による内容積向上に貢献できることができる冷蔵庫が提案されている（例えば、特許文献１参照）。 Therefore, as a method of facilitating the desorption of the vacuum heat insulating material in the refrigerator, the vacuum heat insulating material itself is serviced by applying the vacuum heat insulating material to the place where it is not in close contact with the foam heat insulating material and can be easily detached from the outside. There has been proposed a refrigerator that facilitates replacement and can contribute to the improvement of the internal volume by reducing the thickness of the heat insulating material as in the past (see, for example, Patent Document 1).
しかしながら、上記従来の構成では、冷蔵庫からの真空断熱材の取り外しは容易となるが、真空断熱材がウレタン発泡断熱材中に埋設されている場合と比較し、外箱または内箱の形状が複雑になって、冷蔵庫本体を構成する断熱箱体の製造コストが増加したり、冷蔵庫本体を構成する断熱箱体の強度が低下したり、真空断熱材内にガスが侵入しやすくなって、真空断熱材の断熱性能の劣化が早まり、断熱性能の悪化による省エネ性能の悪化、消費電力量増加による炭酸ガス排出量アップなど環境面の悪化に繋がる課題を有していた。 However, in the above conventional configuration, it is easy to remove the vacuum heat insulating material from the refrigerator, but the shape of the outer box or the inner box is complicated compared to the case where the vacuum heat insulating material is embedded in the urethane foam heat insulating material. As a result, the manufacturing cost of the heat insulation box constituting the refrigerator main body increases, the strength of the heat insulation box constituting the refrigerator main body decreases, or the gas easily enters the vacuum heat insulating material. There was a problem that led to deterioration of heat insulation performance of the material, deterioration of energy saving performance due to deterioration of heat insulation performance, and environmental deterioration such as increase of carbon dioxide emission due to increased power consumption.
また、グラスウールからなる芯材を使用する場合、ソーダ石灰等のアルカリ酸化物を含むガラス表面と経時的に侵入する水との接触により、ガラス表面からのアルカリイオンの選択的な溶出がおこり、表面にＳｉ−ＯＨに富む層が形成され、アルカリイオン溶出によって水中の水酸基濃度が増し、ＰＨが９以上になると、Ｓｉ−Ｏ−Ｓｉの切断が起こり、劣化が促進される可能性がある。 In addition, when using a core made of glass wool, selective elution of alkali ions from the glass surface occurs due to contact between the glass surface containing an alkali oxide such as soda lime and water that invades over time. When a layer rich in Si—OH is formed, the hydroxyl group concentration in water increases due to elution of alkali ions, and the pH is 9 or more, Si—O—Si is cleaved, which may promote deterioration.
本発明は、上記従来の課題を解決するもので、グラスウールからなる芯材を使用して断熱箱体を形成した場合であっても、使用期間中に侵入する気体や水分による劣化を抑制し
、一定期間使用後においても、リサイクル性を向上させることを目的とする。
の使用時は、断熱箱体の断熱性能を長期に亘って維持でき、使用済み断熱箱体の廃棄時は、断熱箱体から真空断熱材を回収、真空断熱材からグラスウールからなる芯材を取り出す際、グラスウールが気体吸着デバイスにより、使用期間中に侵入する水分を吸着するため、水分による風化、劣化が小さく、初期性能を維持した状態で、再利用が可能となる。
The present invention solves the above-mentioned conventional problems, even when a heat insulating box is formed using a core material made of glass wool, suppresses deterioration due to gas and moisture entering during the use period, The purpose is to improve recyclability even after a certain period of use.
When used, the heat insulation performance of the heat insulation box can be maintained for a long time. When the used heat insulation box is discarded, the vacuum insulation is collected from the heat insulation box, and the core made of glass wool is taken out from the vacuum heat insulation. At this time, since glass wool adsorbs moisture that intrudes during the use period by the gas adsorption device, the weathering and deterioration due to moisture are small, and reuse is possible while maintaining initial performance.
また、断熱箱体から真空断熱材を回収し易い断熱箱体を提供することを目的とする。 Moreover, it aims at providing the heat insulation box which is easy to collect | recover a vacuum heat insulating material from a heat insulation box.
上記目的を達成するために、本発明の冷蔵庫は、外箱と内箱とで形成される空間に真空断熱材と発泡断熱材とを備えた断熱箱体を有し、前記真空断熱材は、外被材で覆われた空
間内に、少なくとも芯材と水分吸着剤とを内包して減圧密封した真空断熱材であり、前記真空断熱材は、前記外箱もしくは前記内箱に接着剤によって接着されるものであって、前記接着剤は、前記外箱または前記内箱における前記真空断熱材を接着する接着面と前記真空断熱材の芯材部の縁から所定幅以上離れた前記真空断熱材の中央部とが接着されず前記接着面と前記真空断熱材の中央部との隙間に前記ウレタン発泡断熱材が入り込まないように前記真空断熱材の芯材部の縁に沿って前記真空断熱材の外周部を重点的に接着し、前記断熱箱体は複数の真空断熱材を備え、前記複数の真空断熱材の中で、少なくとも最も面積の大きい真空断熱材は、気体吸着物質を有する銅イオン交換したＺＳＭ−５型ゼオライトを用いた気体吸着デバイスを内包しているとともに、前記気体吸着デバイスは、粉末状の前記気体吸着物質を収納する収納容器を有し、前記収納容器と前記芯材とは接着剤を介することなく減圧密封のみによって保持されているものである。
In order to achieve the above object, the refrigerator of the present invention has a heat insulating box body including a vacuum heat insulating material and a foam heat insulating material in a space formed by an outer box and an inner box, It is a vacuum heat insulating material that contains at least a core material and a moisture adsorbent in a space covered with a jacket material and is sealed under reduced pressure, and the vacuum heat insulating material is bonded to the outer box or the inner box with an adhesive. The adhesive is the vacuum heat insulating material that is separated from the edge of the core portion of the vacuum heat insulating material by an adhesive surface for bonding the vacuum heat insulating material in the outer box or the inner box. The vacuum heat insulating material along the edge of the core material portion of the vacuum heat insulating material so that the urethane foam heat insulating material does not enter the gap between the bonding surface and the central portion of the vacuum heat insulating material without being bonded to the central portion of the vacuum heat insulating material. the outer peripheral portion intensively bonding of the heat-insulating main body a plurality of vacuum heat insulating material Of the plurality of vacuum heat insulating materials, at least the largest vacuum heat insulating material contains a gas adsorption device using a ZSM-5 type zeolite exchanged with copper ions having a gas adsorbing material, and The gas adsorbing device has a storage container for storing the powdery gas adsorbing substance, and the storage container and the core member are held only by vacuum sealing without using an adhesive.
これによって、使用済み冷蔵庫の廃棄時、断熱箱体から真空断熱材を回収、真空断熱材からグラスウールからなる芯材を取り出す際、グラスウールが気体吸着デバイスにより、使用期間中に侵入する水分を吸着するため、水分による風化、劣化が小さく、初期性能を維持した状態で、再利用が可能となり、かつ、断熱箱体から真空断熱材を回収し易い断熱箱体を提供することができる。
また、これによって、グラスウールと気体吸着物質とが接着剤等を介して接着されておらず、外皮材内部に接着剤を用いずに減圧密封することで、グラスウールを不純物なしに取出すことができ、より断熱性能を維持したグラスウールを用いた再利用を行うことが可能となる。
また、これによって、真空断熱材を外箱と内箱との中間でウレタン発泡断熱材に埋没させている場合や、真空断熱材の芯材部の片面をほぼ全面を接着剤で外箱の内面または内箱の外面に接着している場合と比べて、真空断熱材を破損せずに回収し易いので、使用済み断熱箱体の廃棄時は断熱箱体から真空断熱材を回収し易く、リサイクル性を向上させた断熱箱体を提供することができる。
Thus, when the used refrigerator is discarded, the vacuum heat insulating material is collected from the heat insulating box, and when the core material made of glass wool is taken out from the vacuum heat insulating material, the glass wool adsorbs moisture that enters during the use period by the gas adsorption device. Therefore, it is possible to provide a heat insulating box that can be reused and is easy to recover the vacuum heat insulating material from the heat insulating box while weathering and deterioration due to moisture are small and the initial performance is maintained.
In addition, by this, the glass wool and the gas adsorbing substance are not bonded via an adhesive or the like, and the glass wool can be taken out without impurities by sealing under reduced pressure without using an adhesive inside the outer skin material. It becomes possible to recycle using glass wool with more heat insulation performance maintained.
This also allows the vacuum insulation material to be buried in the urethane foam insulation material between the outer box and the inner box, or the inner surface of the outer case with the adhesive on almost one side of the core of the vacuum insulation material. Or compared to the case where it is bonded to the outer surface of the inner box, it is easier to recover the vacuum insulation without damaging it, so it is easier to recover the vacuum insulation from the insulation box when recycling the used insulation box. The heat insulation box which improved the property can be provided.
本発明は、使用済み断熱箱体の廃棄時は、断熱箱体から真空断熱材を回収した状態で、水分による風化、劣化が小さく、初期性能を維持した状態で、再利用が可能となり、環境負荷が小さく、省資源化を図った冷蔵庫を提供することができる。
また、グラスウールと気体吸着物質とが接着剤等を介して接着されておらず、外皮材内部に接着剤を用いずに減圧密封することで、グラスウールを不純物なしに取出すことができ、より断熱性能を維持したグラスウールを用いた再利用を行うことが可能となる。
また、真空断熱材を外箱と内箱との中間でウレタン発泡断熱材に埋没させている場合や、真空断熱材の芯材部の片面をほぼ全面を接着剤で外箱の内面または内箱の外面に接着している場合と比べて、真空断熱材を破損せずに回収し易いので、使用済み断熱箱体の廃棄時は断熱箱体から真空断熱材を回収し易く、リサイクル性を向上させた断熱箱体を提供することができる。
In the present invention, when the used heat insulation box is discarded, the vacuum heat insulating material is recovered from the heat insulation box, and weathering and deterioration due to moisture are small. A refrigerator with low load and resource saving can be provided.
In addition, glass wool and gas adsorbing substances are not bonded via an adhesive, etc., and glass wool can be taken out without impurities by sealing under reduced pressure without using an adhesive inside the outer skin material. It is possible to reuse the glass wool that maintains the above.
In addition, when vacuum insulation is buried in urethane foam insulation between the outer box and inner box, the inner surface of the outer box or inner box of the core part of the vacuum insulation is almost entirely covered with adhesive. Compared to the case where it is bonded to the outer surface of the vacuum insulation material, it is easy to collect the vacuum insulation material without damaging it, so it is easy to collect the vacuum insulation material from the insulation box body when discarding the used insulation box body, improving recyclability It is possible to provide a heat-insulated box body.
第１の発明は、外箱と内箱とで形成される空間に真空断熱材と発泡断熱材とを備えた断熱箱体を有し、前記真空断熱材は、外被材で覆われた空間内に、少なくとも芯材と水分吸着剤とを内包して減圧密封した真空断熱材であり、前記真空断熱材は、前記外箱もしくは前記内箱に接着剤によって接着されるものであって、前記接着剤は、前記外箱または前記内箱における前記真空断熱材を接着する接着面と前記真空断熱材の芯材部の縁から所定幅以上離れた前記真空断熱材の中央部とが接着されず前記接着面と前記真空断熱材の中央部との隙間に前記ウレタン発泡断熱材が入り込まないように前記真空断熱材の芯材部の縁に沿って前記真空断熱材の外周部を重点的に接着し、前記断熱箱体は複数の真空断熱材を備え、前記複数の真空断熱材の中で、少なくとも最も面積の大きい真空断熱材は、気体吸着物質を有する銅イオン交換したＺＳＭ−５型ゼオライトを用いた気体吸着デバイスを内包しているとともに、前記気体吸着デバイスは、粉末状の前記気体吸着物質を収納する収納容器を有し、前記収納容器と前記芯材とは接着剤を介することなく減圧密封のみによって保持されているものである。 1st invention has the heat insulation box provided with the vacuum heat insulating material and the foam heat insulating material in the space formed with an outer box and an inner box, The said vacuum heat insulating material is the space covered with the jacket material Inside is a vacuum heat insulating material containing at least a core material and a moisture adsorbent and sealed under reduced pressure, and the vacuum heat insulating material is bonded to the outer box or the inner box with an adhesive, The adhesive is not bonded between the bonding surface for bonding the vacuum heat insulating material in the outer box or the inner box and the central portion of the vacuum heat insulating material that is more than a predetermined width away from the edge of the core portion of the vacuum heat insulating material. Bond the outer peripheral part of the vacuum heat insulating material mainly along the edge of the core part of the vacuum heat insulating material so that the urethane foam heat insulating material does not enter the gap between the bonding surface and the central part of the vacuum heat insulating material. and, wherein the insulating box body is provided with a plurality of vacuum heat insulator, the plurality of the vacuum heat insulating material The vacuum heat insulating material having the largest area includes a gas adsorption device using a ZSM-5 type zeolite exchanged with copper ions having a gas adsorbing substance, and the gas adsorption device is in the form of a powder gas adsorbent. It has a storage container for storing a substance, and the storage container and the core material are held only by vacuum sealing without an adhesive.
これによって、真空断熱材は、芯材と共に水分吸着剤と気体吸着デバイスを減圧密封しているので、外部から侵入する空気や水分を、水分吸着剤と気体吸着デバイスで吸着し、高水吸着平衡圧域において、気体吸着デバイスが水分を吸着して劣化するのを水分吸着剤で抑えて、低水吸着平衡圧域の微量水分を長期に亘って吸着し、減圧状態を維持でき、真空断熱材の高い断熱性能を長期に亘って維持できる。 As a result, the vacuum heat insulating material seals the moisture adsorbent and the gas adsorbing device together with the core material under reduced pressure, so that air and moisture entering from the outside are adsorbed by the moisture adsorbent and the gas adsorbing device, and the high water adsorption equilibrium In the pressure range, the gas adsorption device adsorbs moisture and suppresses deterioration with a moisture adsorbent, so that a small amount of moisture in the low water adsorption equilibrium pressure range can be adsorbed over a long period of time, maintaining a reduced pressure state, and a vacuum insulation material High thermal insulation performance can be maintained over a long period of time.
また、外箱と内箱とで形成される空間内に真空断熱材が配置され、外箱と内箱とで形成される空間の真空断熱材以外の空間はウレタン発泡断熱材が充填されているので、外箱と内箱とで形成される空間の外に真空断熱材を配置する場合と比較して、真空断熱材内に空
気や水分が侵入し難く、真空断熱材内に空気や水分が侵入することによる真空断熱材の内圧の増加と、その内圧増加による真空断熱材の断熱性能の悪化が発生しにくい。
Further, a vacuum heat insulating material is disposed in a space formed by the outer box and the inner box, and a space other than the vacuum heat insulating material in the space formed by the outer box and the inner box is filled with urethane foam heat insulating material. Therefore, compared to the case where the vacuum heat insulating material is disposed outside the space formed by the outer box and the inner box, air and moisture are less likely to enter the vacuum heat insulating material, and the air and moisture are less likely to enter the vacuum heat insulating material. The increase in the internal pressure of the vacuum heat insulating material due to the penetration and the deterioration of the heat insulating performance of the vacuum heat insulating material due to the increase in the internal pressure are unlikely to occur.
また、使用期間中の真空断熱材の乾燥状態が維持されているので、グラスウールからなる芯材の風化が抑制されるため、廃棄時に取り出した芯材の性能劣化が小さく、真空断熱材への再利用が容易となる。
また、これによって、グラスウールと気体吸着物質とが接着剤等を介して接着されておらず、外皮材内部に接着剤を用いずに減圧密封することで、グラスウールを不純物なしに取出すことができ、より断熱性能を維持したグラスウールを用いた再利用を行うことが可能となる。
また、これによって、真空断熱材を外箱と内箱との中間でウレタン発泡断熱材に埋没させている場合や、真空断熱材の芯材部の片面をほぼ全面を接着剤で外箱の内面または内箱の外面に接着している場合と比べて、真空断熱材を破損せずに回収し易いので、使用済み断熱箱体の廃棄時は断熱箱体から真空断熱材を回収し易く、リサイクル性を向上させた断熱箱体を提供することができる。
In addition, since the dry state of the vacuum heat insulating material during the period of use is maintained, weathering of the core material made of glass wool is suppressed, so the performance deterioration of the core material taken out at the time of disposal is small, and the vacuum heat insulating material can be reused. Easy to use.
In addition, by this, the glass wool and the gas adsorbing substance are not bonded via an adhesive or the like, and the glass wool can be taken out without impurities by sealing under reduced pressure without using an adhesive inside the outer skin material. It becomes possible to recycle using glass wool with more heat insulation performance maintained.
This also allows the vacuum insulation material to be buried in the urethane foam insulation material between the outer box and the inner box, or the inner surface of the outer case with the adhesive on almost one side of the core of the vacuum insulation material. Or compared to the case where it is bonded to the outer surface of the inner box, it is easier to recover the vacuum insulation without damaging it, so it is easier to recover the vacuum insulation from the insulation box when recycling the used insulation box. The heat insulation box which improved the property can be provided.
第２の発明は、水吸着平衡圧が５００Ｐａ以下の低水吸着平衡圧域で、前記芯材の乾燥状態を維持したものである。 The second invention maintains the dry state of the core material in the low water adsorption equilibrium pressure region where the water adsorption equilibrium pressure is 500 Pa or less .
第３の発明は、特に、第２の発明の接着剤に、熱膨張型接着剤を用いたものであり、熱膨張型接着剤は、高温で膨張して接着力が失われた後に常温冷却しても、その膨張状態が維持されるため、常温で容易に外箱、又は内箱などの被着体と分離することができる。 In the third invention, in particular, a thermal expansion adhesive is used as the adhesive of the second invention, and the thermal expansion adhesive is cooled at room temperature after it expands at a high temperature and loses its adhesive strength. However, since the expanded state is maintained, it can be easily separated from the adherend such as the outer box or the inner box at room temperature.
以下、本発明の断熱箱体の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって、この発明が限定されるものではない。 Hereinafter, embodiments of the heat insulating box of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.
（実施の形態１）
図１は、本発明の実施の形態１における断熱箱体の正面図であり、図２は、本発明の実施の形態１における断熱箱体の横断面図であり、図３は、同実施の形態の断熱箱体に用いた真空断熱材のヒレ折り前の断面図であり、図４は、同実施の形態の断熱箱体に用いたヒレ折り後の真空断熱材を接着剤側から見た平面図であり、図５は平衡圧の違いにおける水分吸着量を示した図である。
(Embodiment 1)
FIG. 1 is a front view of a heat insulation box according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the heat insulation box according to Embodiment 1 of the present invention, and FIG. It is sectional drawing before fin folding of the vacuum heat insulating material used for the heat insulation box of the form, and FIG. 4 saw the vacuum heat insulating material after fin folding used for the heat insulation box of the embodiment from the adhesive side. FIG. 5 is a plan view, and FIG. 5 is a diagram showing the amount of moisture adsorption with respect to the difference in equilibrium pressure.
図１から図４に示すように、本実施の形態の冷蔵庫は、前方に開口する金属製（例えば鉄板）の外箱２と硬質樹脂製（例えばＡＢＳ）の内箱３と、外箱２と内箱３の間に発泡充填された硬質ウレタンフォームからなる発泡断熱材４で形成された断熱箱体で、この断熱箱体１の上部に設けられた冷蔵室２０と、冷蔵室２０の下に設けられた上段冷凍室２１と、冷蔵室２０の下で上段冷凍室２１に並列に設けられた製氷室２２と、本体下部に設けられた野菜室２３と、並列に設置された上段冷凍室２１及び製氷室２２と野菜室２３の間に設けられた下段冷凍室２４で構成されている。 As shown in FIGS. 1 to 4, the refrigerator according to the present embodiment includes a metal (for example, iron plate) outer box 2, a hard resin (for example, ABS) inner box 3, and an outer box 2. A heat insulation box formed of a foam heat insulating material 4 made of rigid urethane foam filled with foam between inner boxes 3, a refrigerating room 20 provided above the heat insulating box 1, and under the refrigerating room 20 An upper freezer chamber 21 provided, an ice making chamber 22 provided in parallel to the upper freezer chamber 21 under the refrigerator compartment 20, a vegetable chamber 23 provided in the lower part of the main body, and an upper freezer chamber 21 installed in parallel. And a lower freezing room 24 provided between the ice making room 22 and the vegetable room 23.
冷蔵室２０は回転式の扉５を備え、回転式の扉５は、片開きで冷蔵室２０を開閉自在に閉塞している。
また、上段冷凍室２１と製氷室２２と下段冷凍室２４と野菜室２３の前面部はそれぞれに対応した引き出し式の扉により開閉自由に閉塞される
断熱箱体１は、複数の真空断熱材１０を備えている。
The refrigerating room 20 includes a rotary door 5, and the revolving door 5 closes the refrigerating room 20 so as to be openable and closable with a single opening.
Further, the front portions of the upper freezing chamber 21, the ice making chamber 22, the lower freezing chamber 24, and the vegetable chamber 23 are freely opened and closed by corresponding drawer doors. It has.
真空断熱材１０は、少なくともガラス繊維からなる芯材８と酸化カルシウムからなる水分吸着剤６とガスバリア性の２枚のラミネートフィルムからなる外被材９内に減圧密封して構成されている。 The vacuum heat insulating material 10 is configured to be sealed in a vacuum at least in a core material 8 made of glass fiber, a moisture adsorbent 6 made of calcium oxide, and an outer cover material 9 made of two gas barrier laminate films.
断熱箱体１に備えられた真空断熱材の中でも、少なくとも最も面積の大きい真空断熱材１０には、銅イオン交換したＺＳＭ−５型ゼオライトを用いた気体吸着デバイス７を内包しガスバリア性の２枚のラミネートフィルム９内に減圧密封してなる真空断熱材１０としている。 Among the vacuum heat insulating materials provided in the heat insulating box 1, at least the vacuum heat insulating material 10 having the largest area includes two gas barrier properties including a gas adsorption device 7 using ZSM-5 type zeolite exchanged with copper ions. The vacuum heat insulating material 10 is sealed in the laminate film 9 under reduced pressure.
気体吸着デバイス７は、粉末状のＺＳＭ−５型ゼオライトを用いた気体吸着物質を金属製の収納容器１２内に密封して形成している。 The gas adsorbing device 7 is formed by sealing a gas adsorbing material using powdered ZSM-5 type zeolite in a metal container 12.
この気体吸着デバイス７を芯材とともに外被材９内に減圧密封した後で、外力による破壊等の何らかの方法によって、収納容器１２に貫通孔を開けることで、収納容器１２内部と外被材９内とを連通させている。 After the gas adsorbing device 7 is hermetically sealed in the jacket material 9 together with the core material, a through-hole is opened in the storage container 12 by some method such as destruction by an external force, whereby the inside of the storage container 12 and the jacket material 9 are formed. It communicates with the inside.
断熱箱体１は、真空断熱材１０を鋼板からなる外箱２の内面に接着剤１１で接着した上で、外箱２とＡＢＳなどの樹脂からなる内箱３とで形成される空間にシクロペンタンを発泡剤として適用したウレタン発泡断熱材４を充填している。 The heat insulating box 1 has a vacuum heat insulating material 10 bonded to the inner surface of an outer box 2 made of a steel plate with an adhesive 11, and in a space formed by the outer box 2 and an inner box 3 made of a resin such as ABS. A urethane foam heat insulating material 4 in which pentane is applied as a foaming agent is filled.
そして、接着剤１１は、外箱２における真空断熱材１０を接着する接着面と真空断熱材１０の芯材部（両面のラミネートフィルム９間に芯材８がある部分）の縁から所定幅以上離れた真空断熱材１０の中央部とが接着されず、外箱２における真空断熱材１０を接着する接着面と真空断熱材１０の中央部との隙間にウレタン発泡断熱材４が入り込まないように、真空断熱材１０の芯材部の縁に沿って真空断熱材１０の外周部を重点的に接着している。 The adhesive 11 has a predetermined width or more from the edge of the adhesive surface in the outer box 2 to which the vacuum heat insulating material 10 is bonded and the core material portion of the vacuum heat insulating material 10 (the portion where the core material 8 is between the laminated films 9 on both sides). The central part of the vacuum heat insulating material 10 that is separated is not bonded, and the urethane foam heat insulating material 4 does not enter the gap between the bonding surface of the outer case 2 to which the vacuum heat insulating material 10 is bonded and the central part of the vacuum heat insulating material 10. The outer peripheral portion of the vacuum heat insulating material 10 is preferentially bonded along the edge of the core material portion of the vacuum heat insulating material 10.
また、本願で用いたＺＳＭ−５型ゼオライトは、窒素吸着性能が高いことに加え、水分吸着性能も高いことが特徴である。 Further, the ZSM-5 type zeolite used in the present application is characterized by high moisture adsorption performance in addition to high nitrogen adsorption performance.
図５に本実施の形態で用いたＺＳＭ−５型ゼオライトと他の水分吸着剤との水分吸着量の比較を示す。 FIG. 5 shows a comparison of the amount of moisture adsorption between the ZSM-5 type zeolite used in the present embodiment and another moisture adsorbent.
図５は、大気圧とされる１３２００Ｐａよりも減圧状態での水分吸着量を示している。この中で、３０００Ｐａでの吸着量は活性炭が大きく７３５ｃｃ／ｇであり、２０００Ｐａまで減圧した状態であっても５００ｃｃ／ｇを上回る高い水分吸着量であることがわかる。一方で、本願発明で気体吸着物質として用いたＺＳＭ−５型ゼオライトは、２０００Ｐａ以上の減圧状態では、活性炭を大きく下回るが、１０００Ｐａ以下の真空度が高くなっている平衡圧においては、１００ｃｃ／ｇを上回り、さらに５００Ｐａであっても、同様の１００ｃｃ／ｇの水分吸着量を維持している。 FIG. 5 shows the amount of moisture adsorbed in a reduced pressure state from 13200 Pa, which is atmospheric pressure. Among these, the adsorbed amount at 3000 Pa is large at 735 cc / g for activated carbon, and it can be seen that the adsorbed amount is higher than 500 cc / g even when the pressure is reduced to 2000 Pa. On the other hand, the ZSM-5 type zeolite used as a gas adsorbing substance in the present invention is significantly lower than activated carbon in a reduced pressure state of 2000 Pa or higher, but is 100 cc / g at an equilibrium pressure where the degree of vacuum is 1000 Pa or lower. Even when the pressure is 500 Pa, the same amount of water adsorption of 100 cc / g is maintained.
なお、図５の表で用いたＺＳＭ−５型ゼオライトは、銅１価サイトの割合が、６０％以上であり、銅１価サイトのうち、酸素３配位の銅１価サイトは、７０％以上のものである。 The ZSM-5 type zeolite used in the table of FIG. 5 has a copper monovalent site ratio of 60% or more, and among the copper monovalent sites, the oxygen tricoordinate copper monovalent site is 70%. That's all.
一般に冷蔵庫に適用される真空断熱材は１０年間使用した後であっても平衡圧は５００Ｐａ以下であり、実製品においては、使用期間１０年間を経た後であっても、１００Ｐａ以下といった水吸着平衡圧に芯材の乾燥状態が維持されているような高性能の真空断熱材を用いている。 In general, vacuum insulation applied to refrigerators has an equilibrium pressure of 500 Pa or less even after 10 years of use. In actual products, even after 10 years of use, the water adsorption equilibrium is 100 Pa or less. A high-performance vacuum heat insulating material that maintains the dry state of the core material under pressure is used.
よって、高い真空度を有する冷蔵庫の真空断熱材においては、本実施の形態のＺＳＭ−５型ゼオライトを用いることで、高い真空度の平衡圧であっても、空気の中で大部分を占める窒素に加え、空気中に含まれる水分を吸着することが可能となる。 Therefore, in the vacuum heat insulating material of the refrigerator having a high degree of vacuum, by using the ZSM-5 type zeolite of the present embodiment, nitrogen that occupies most of the air even at an equilibrium pressure of high degree of vacuum. In addition, it becomes possible to adsorb moisture contained in the air.
また、仮に、何らかの外乱影響を受けた場合であっても２００Ｐａ以下の水吸着平衡圧に芯材の乾燥状態が維持されることが望ましく、その場合には、グラスウールの風化の影響をほとんど受けず、初期の性能を維持することが可能となる。 In addition, even if it is affected by some disturbance, it is desirable that the dry state of the core material is maintained at a water adsorption equilibrium pressure of 200 Pa or less, and in that case, it is hardly affected by weathering of glass wool. The initial performance can be maintained.
上記構成において、真空断熱材１０は、芯材８と共に水分吸着剤６と気体吸着デバイス７を減圧密封しているので、外部から侵入する空気や水分を、水分吸着剤６と気体吸着デバイス７で吸着し、気体吸着デバイス７が水分を吸着して劣化するのを水分吸着剤６で抑えて、長期に亘って減圧状態を維持でき、真空断熱材１０の高い断熱性能を長期に亘って維持できる。 In the above configuration, since the vacuum heat insulating material 10 seals the moisture adsorbent 6 and the gas adsorbing device 7 together with the core material 8 under reduced pressure, the air adsorbing agent 6 and the gas adsorbing device 7 can remove air and moisture entering from the outside. The moisture adsorbent 6 prevents the gas adsorbing device 7 from adsorbing and deteriorating the moisture, can maintain the reduced pressure state for a long period of time, and can maintain the high thermal insulation performance of the vacuum heat insulating material 10 for a long period of time. .
また、外箱２と内箱３とで形成される空間内に真空断熱材１０が配置され、外箱２と内箱３とで形成される空間の真空断熱材１０以外の空間はウレタン発泡断熱材４が充填されているので、外箱２と内箱３とで形成される空間の外に真空断熱材１０を配置する場合と比較して、真空断熱材１０内に空気や水分が侵入し難く、真空断熱材１０内に空気や水分が侵入することによる真空断熱材１０の内圧の増加と、その内圧増加による真空断熱材１０の断熱性能の悪化が発生しにくい。 Further, a vacuum heat insulating material 10 is disposed in a space formed by the outer box 2 and the inner box 3, and a space other than the vacuum heat insulating material 10 in the space formed by the outer box 2 and the inner box 3 is urethane foam heat insulating. Since the material 4 is filled, air and moisture enter the vacuum heat insulating material 10 as compared with the case where the vacuum heat insulating material 10 is disposed outside the space formed by the outer box 2 and the inner box 3. It is difficult to increase the internal pressure of the vacuum heat insulating material 10 due to the intrusion of air or moisture into the vacuum heat insulating material 10 and to deteriorate the heat insulating performance of the vacuum heat insulating material 10 due to the increase of the internal pressure.
上記のように、真空断熱材１０は、芯材と共に水分吸着剤とＺＳＭ−５型ゼオライトを用いた気体吸着デバイスを減圧密封しているので、外部から侵入する空気や水分を、水分吸着剤に加え、気体吸着デバイスで吸着し、高水吸着平衡圧域において、気体吸着デバイスが水分を吸着して劣化するのを水分吸着剤で抑えて、低水吸着平衡圧域の微量水分を長期に亘って吸着し、減圧状態を維持でき、真空断熱材の高い断熱性能を長期に亘って維持できる。 As described above, since the vacuum heat insulating material 10 seals the gas adsorption device using the moisture adsorbent and the ZSM-5 type zeolite together with the core material under reduced pressure, air or moisture entering from the outside is used as the moisture adsorbent. In addition, it is adsorbed by the gas adsorption device, and in the high water adsorption equilibrium pressure range, the gas adsorption device adsorbs moisture and deteriorates with a moisture adsorbent, so that a trace amount of moisture in the low water adsorption equilibrium pressure range can be retained for a long time. Can be adsorbed and maintained in a reduced pressure state, and the high heat insulating performance of the vacuum heat insulating material can be maintained over a long period of time.
これによって、使用期間中の真空断熱材の乾燥状態が維持されているので、グラスウールからなる芯材の風化が抑制されるため、廃棄時に取り出した芯材の性能劣化が小さく、真空断熱材への再利用が容易となる。 Since the dry state of the vacuum heat insulating material during the period of use is maintained by this, since the weathering of the core material made of glass wool is suppressed, the performance deterioration of the core material taken out at the time of disposal is small, and the vacuum heat insulating material is reduced. Reuse becomes easy.
さらに、真空断熱材は、外箱２の内面または内箱３の外面に接着剤１１で接着され、接着剤１１は、外箱２または内箱３における真空断熱材１０を接着する接着面と真空断熱材１０の芯材部（両面のラミネートフィルム間に芯材がある部分）の縁から所定幅以上離れた真空断熱材の中央部とが接着されず接着面と真空断熱材の中央部との隙間にウレタンの発泡断熱材４が入り込まないように真空断熱材１０の芯材部の縁に沿って真空断熱材１０の外周部を重点的に接着しているので、真空断熱材１０を外箱と内箱との中間でウレタン発泡断熱材４に埋没させている場合や、真空断熱材１０の芯材部の片面をほぼ全面を接着剤で外箱の内面または内箱の外面に接着している場合と比べて、真空断熱材を破損せずに回収し易い。 Further, the vacuum heat insulating material is bonded to the inner surface of the outer box 2 or the outer surface of the inner box 3 with an adhesive 11, and the adhesive 11 is vacuum bonded to the bonding surface for bonding the vacuum heat insulating material 10 in the outer box 2 or the inner box 3. The center portion of the vacuum heat insulating material that is more than a predetermined width away from the edge of the core portion of the heat insulating material 10 (the portion where the core material is between the laminated films on both sides) is not bonded, and the bonding surface and the central portion of the vacuum heat insulating material Since the outer peripheral part of the vacuum heat insulating material 10 is mainly bonded along the edge of the core material part of the vacuum heat insulating material 10 so that the urethane foam heat insulating material 4 does not enter the gap, the vacuum heat insulating material 10 is attached to the outer box. When the urethane foam heat insulating material 4 is buried between the inner box and the inner box, or one surface of the core part of the vacuum heat insulating material 10 is adhered to the inner surface of the outer box or the outer surface of the inner box with an adhesive. Compared with the case where it is, it is easy to collect the vacuum heat insulating material without damaging it.
さらに、真空断熱材の芯材であるグラスウールは空気の進入により、風化が促進されることがわかっている。この際に、芯材の体積が小さく、面積が小さい真空断熱材よりも芯
材の体積が大きく、大きい面積の真空断熱材の方が、空気進入による内圧の上昇が少ない。すなわち、真空断熱材１０の経年劣化が生じにくいが、本実施の形態では最も面積の大きい真空断熱材１０に気体吸着物質７を備えることで、さらにグラスウールの風化を防ぐことができ、１０年間といった長期間使用した後に、リサイクルする場合においても、風化が抑制され、より断熱性能を維持したグラスウールを用いて再利用を行うことが可能となるので、リサイクル性が向上する。
Furthermore, it has been found that weathering of glass wool, which is the core material of the vacuum heat insulating material, is promoted by the ingress of air. At this time, the volume of the core material is larger than that of the vacuum heat insulating material having a small core volume and a small area, and the vacuum pressure insulating material having a large area is less likely to increase the internal pressure due to air entry. That is, although the aging deterioration of the vacuum heat insulating material 10 is unlikely to occur, the present embodiment can further prevent weathering of glass wool by providing the gas adsorbing material 7 in the vacuum heat insulating material 10 having the largest area, such as 10 years. Even when recycling after long-term use, weathering is suppressed, and it is possible to reuse glass wool that maintains more heat insulation performance, thus improving recyclability.
また、リサイクルを行う場合に、本実施の形態のようにグラスウールと気体吸着物質とが接着剤等を介して接着されておらず、外皮材内部に接着剤を用いずに減圧密封することで、グラスウールを不純物なしに取出すことができ、より断熱性能を維持したグラスウールを用いた再利用を行うことが可能となる。 Also, when recycling, glass wool and gas adsorbing substances are not bonded via an adhesive or the like as in the present embodiment, and by sealing under reduced pressure without using an adhesive inside the outer skin material, Glass wool can be taken out without impurities, and can be reused using glass wool with more heat insulation performance maintained.
さらに、外被材を破断して内部のグラスウールのみを再利用する場合には、同じ外被材を破断する工数であっても、より多くの芯材を取出すことができ、よりリサイクル効率を高めることが可能となる。 Furthermore, when the outer shell material is broken and only the inner glass wool is reused, more core material can be taken out even if the man-hour for breaking the same outer jacket material is increased, thereby improving the recycling efficiency. It becomes possible.
したがって、この真空断熱材１０を有する断熱箱体１の断熱性能を長期に亘って維持できる。 Therefore, the heat insulation performance of the heat insulation box 1 having the vacuum heat insulating material 10 can be maintained over a long period of time.
また、真空断熱材１０は、外箱２の内面に接着剤１１で接着され、接着剤１１は、外箱２における真空断熱材１０を接着する接着面と真空断熱材１０の芯材部の縁から所定幅以上離れた真空断熱材１０の中央部とが接着されず外箱２における真空断熱材１０を接着する接着面と真空断熱材１０の中央部との隙間にウレタン発泡断熱材４が入り込まないように真空断熱材１０の芯材部の縁に沿って真空断熱材１０の外周部を重点的に接着しているので、真空断熱材１０を外箱２と内箱３との中間でウレタン発泡断熱材４に埋没させている場合や、真空断熱材１０の芯材部の片面をほぼ全面を接着剤１１で外箱２の内面または内箱３の外面に接着している場合と比べて、真空断熱材１０を破損せずに回収し易い。 The vacuum heat insulating material 10 is bonded to the inner surface of the outer box 2 with an adhesive 11, and the adhesive 11 is bonded to the vacuum insulating material 10 in the outer box 2 and the edge of the core portion of the vacuum heat insulating material 10. The urethane foam heat insulating material 4 enters the gap between the bonding surface to which the vacuum heat insulating material 10 in the outer box 2 is bonded and the central portion of the vacuum heat insulating material 10 without being bonded to the central portion of the vacuum heat insulating material 10 separated by a predetermined width or more. Since the outer peripheral part of the vacuum heat insulating material 10 is intensively adhered along the edge of the core material part of the vacuum heat insulating material 10, the vacuum heat insulating material 10 is urethane between the outer box 2 and the inner box 3. Compared with the case where it is buried in the foam heat insulating material 4 or the case where one side of the core part of the vacuum heat insulating material 10 is bonded almost entirely to the inner surface of the outer box 2 or the outer surface of the inner box 3 with the adhesive 11. It is easy to collect the vacuum heat insulating material 10 without damaging it.
本実施の形態では、接着剤１１には、ホットメルト接着剤又は、熱膨張型接着剤を適用する。 In the present embodiment, a hot melt adhesive or a thermal expansion adhesive is applied to the adhesive 11.
ホットメルト接着剤としては、例えば旭化学合成株式会社製ＡＺ７７８５を用いることができる。その他、ウレタン系、ＥＶＡ系のホットメルトを適用しても良いが、真空断熱材１０に塗布してから外箱２への貼り付けまでの時間が異なる。本接着剤は、真空断熱材１０に塗布後、離型紙などで覆うことにより、初期の接着性を維持することができる。 As the hot melt adhesive, for example, AZ7785 manufactured by Asahi Chemical Synthesis Co., Ltd. can be used. In addition, although urethane type and EVA type hot melt may be applied, the time from application to the vacuum heat insulating material 10 to application to the outer box 2 is different. The initial adhesiveness can be maintained by applying the adhesive to the vacuum heat insulating material 10 and then covering with a release paper or the like.
接着剤１１は、点状、または、点状と線状の組み合わせで塗布し、真空断熱材１０を外箱２又は内箱３に貼り付け後、ウレタン発泡断熱材４の充填発泡形成までの間、真空断熱材１０を仮固定するものである。 The adhesive 11 is applied in the form of dots or a combination of dots and lines, and after the vacuum heat insulating material 10 is pasted on the outer box 2 or the inner box 3, until the foam foaming of the urethane foam heat insulating material 4 is formed. The vacuum heat insulating material 10 is temporarily fixed.
外箱２における真空断熱材１０を接着する接着面と真空断熱材１０の中央部との隙間にウレタン発泡断熱材４が入り込まないようにすることにより、断熱箱体１の外箱２の外観変形を抑制できる。また、接着剤１１の塗布量を必要最低限としているため、外箱２又は内箱３との離型が容易となり、真空断熱材１０を破袋することなく、取り出すことができる。接着剤１１の塗布面積は、真空断熱材１０の片面の芯材部の表面積の１０％以下の範囲とする。 The outer appearance deformation of the outer box 2 of the heat insulating box 1 is prevented by preventing the urethane foam heat insulating material 4 from entering the gap between the bonding surface for bonding the vacuum heat insulating material 10 in the outer box 2 and the central portion of the vacuum heat insulating material 10. Can be suppressed. Moreover, since the application quantity of the adhesive agent 11 is made into the minimum necessary, mold release with the outer box 2 or the inner box 3 becomes easy, and it can take out, without breaking the vacuum heat insulating material 10. The application area of the adhesive 11 is set to a range of 10% or less of the surface area of the core part on one side of the vacuum heat insulating material 10.
ラミネートフィルム９は、最内層の熱溶着層として、厚み５０μｍの直鎖低密度ポリエチレンフィルムを、中間層のガスバリア層として、厚み６μｍのアルミニウム箔を、また最外層の表面保護層として、厚み１５μｍと２５μｍのナイロンフィルム２層を積層して
なる。
Laminate film 9 has a thickness of 15 μm as an innermost heat-bonding layer, a linear low-density polyethylene film with a thickness of 50 μm, a gas barrier layer as an intermediate layer, an aluminum foil with a thickness of 6 μm, and a surface protective layer as an outermost layer. Two layers of 25 μm nylon film are laminated.
ガスバリア層は、アルミ蒸着フィルムを適用しても良く、また、アルミ蒸着フィルムとアルミニウム箔を組み合わせて適用しても良い。 An aluminum vapor deposition film may be applied to the gas barrier layer, or a combination of an aluminum vapor deposition film and an aluminum foil may be applied.
本実施の形態の断熱箱体１の真空断熱材１０は、長期に亘って減圧状態を維持でき、真空断熱材１０の高い断熱性能を長期に亘って維持できるので、使用済みの断熱箱体１から取り出した真空断熱材１０の性能に問題がなければ、そのまま再利用することができる。 Since the vacuum heat insulating material 10 of the heat insulation box 1 of this Embodiment can maintain a pressure-reduced state over a long period of time and can maintain the high heat insulation performance of the vacuum heat insulating material 10 over a long period of time, the used heat insulation box 1 If there is no problem in the performance of the vacuum heat insulating material 10 taken out from the above, it can be reused as it is.
接着剤１１に、熱膨張型接着剤を適用した場合は、熱膨張型接着剤は、高温で膨張して接着力が失われた後に常温冷却しても、その膨張状態が維持されるため、常温で容易に外箱２、又は内箱３などの被着体と分離することができる。 When a thermal expansion type adhesive is applied to the adhesive 11, the thermal expansion type adhesive maintains its expanded state even after cooling at room temperature after it has expanded at a high temperature and lost its adhesive strength. It can be easily separated from the adherend such as the outer box 2 or the inner box 3 at room temperature.
以上説明したように、本実施の形態では、断熱箱体１の使用時は断熱箱体１の断熱性能を長期に亘って維持でき、使用済み断熱箱体１の廃棄時は断熱箱体１から真空断熱材１０を回収し易い断熱箱体１を提供することができる。 As described above, in the present embodiment, when the heat insulating box 1 is used, the heat insulating performance of the heat insulating box 1 can be maintained over a long period of time, and when the used heat insulating box 1 is discarded, from the heat insulating box 1 The heat insulation box 1 which can collect | recover the vacuum heat insulating material 10 easily can be provided.
なお、本実施の形態では、真空断熱材１０を、外箱２の内面に接着したが、内箱３の外面に接着しても構わない。 In this embodiment, the vacuum heat insulating material 10 is bonded to the inner surface of the outer box 2, but may be bonded to the outer surface of the inner box 3.
本発明の断熱箱体は、断熱箱体の使用時は断熱箱体の断熱性能を長期に亘って維持でき、使用済み断熱箱体の廃棄時は断熱箱体から真空断熱材を回収し易いので、冷蔵庫や自動販売機、給湯容器、建造物用断熱材、自動車用断熱材、保冷・保温ボックス等のような用途にも適用できる。 The heat insulating box of the present invention can maintain the heat insulating performance of the heat insulating box for a long time when the heat insulating box is used, and it is easy to recover the vacuum heat insulating material from the heat insulating box when the used heat insulating box is discarded. It can also be applied to uses such as refrigerators, vending machines, hot water supply containers, heat insulating materials for buildings, heat insulating materials for automobiles, cold insulation and heat insulation boxes.
１ 断熱箱体
２ 外箱
３ 内箱
４ 発泡断熱材
６ 水分吸着剤
７ 気体吸着デバイス
８ 芯材
９ 外被材
１０ 真空断熱材
１１ 接着剤
DESCRIPTION OF SYMBOLS 1 Heat insulation box 2 Outer box 3 Inner box 4 Foam heat insulating material 6 Moisture adsorption agent 7 Gas adsorption device 8 Core material 9 Cover material 10 Vacuum heat insulation material 11 Adhesive
Claims (3)
前記真空断熱材は、外被材で覆われた空間内に、少なくとも芯材と水分吸着剤とを内包して減圧密封した真空断熱材であり、
前記真空断熱材は、前記外箱もしくは前記内箱に接着剤によって接着されるものであって、
前記接着剤は、
前記外箱または前記内箱における前記真空断熱材を接着する接着面と前記真空断熱材の芯材部の縁から所定幅以上離れた前記真空断熱材の中央部とが接着されず前記接着面と前記真空断熱材の中央部との隙間に前記ウレタン発泡断熱材が入り込まないように前記真空断熱材の芯材部の縁に沿って前記真空断熱材の外周部を重点的に接着し、
前記断熱箱体は複数の真空断熱材を備え、
前記複数の真空断熱材の中で、少なくとも最も面積の大きい真空断熱材は、気体吸着物質を有する銅イオン交換したＺＳＭ−５型ゼオライトを用いた気体吸着デバイスを内包しているとともに、前記気体吸着デバイスは、粉末状の前記気体吸着物質を収納する収納容器を有し、前記収納容器と前記芯材とは接着剤を介することなく減圧密封のみによって保持されていることを特徴とする冷蔵庫。 A space formed by the outer box and the inner box has a heat insulating box body provided with a vacuum heat insulating material and a foam heat insulating material,
The vacuum heat insulating material is a vacuum heat insulating material sealed at a reduced pressure by enclosing at least a core material and a moisture adsorbent in a space covered with a jacket material,
The vacuum heat insulating material is bonded to the outer box or the inner box with an adhesive,
The adhesive is
The bonding surface for bonding the vacuum heat insulating material in the outer box or the inner box and the central portion of the vacuum heat insulating material separated by a predetermined width or more from the edge of the core portion of the vacuum heat insulating material are not bonded to the bonding surface. Adhering the outer peripheral part of the vacuum heat insulating material intensively along the edge of the core part of the vacuum heat insulating material so that the urethane foam heat insulating material does not enter the gap with the central part of the vacuum heat insulating material,
The heat insulation box includes a plurality of vacuum heat insulating materials,
Among the plurality of vacuum heat insulating materials, at least the vacuum heat insulating material having the largest area includes a gas adsorption device using a ZSM-5 type zeolite exchanged with copper ions having a gas adsorbing substance, and the gas adsorption The device has a storage container for storing the powdery gas adsorbing substance, and the storage container and the core material are held only by vacuum sealing without using an adhesive.
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| JP2011192683A JP5899395B2 (en) | 2011-09-05 | 2011-09-05 | Heat insulation box |
| EP12747650.5A EP2676714A1 (en) | 2011-02-14 | 2012-02-14 | Heat insulation box body |
| CN2012800088806A CN103384556A (en) | 2011-02-14 | 2012-02-14 | Heat insulation box body |
| PCT/JP2012/000958 WO2012111311A1 (en) | 2011-02-14 | 2012-02-14 | Heat insulation box body |
| US13/983,504 US20130306655A1 (en) | 2011-02-14 | 2012-02-14 | Heat-insulating box |
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| JP2011192683A JP5899395B2 (en) | 2011-09-05 | 2011-09-05 | Heat insulation box |
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| JP5899395B2 true JP5899395B2 (en) | 2016-04-06 |
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| SG10201801051QA (en) * | 2013-06-07 | 2018-04-27 | Mitsubishi Electric Corp | Heat insulating box body, refrigerator, and device including heat insulating box body |
| JP6294317B2 (en) * | 2013-06-07 | 2018-03-14 | 三菱電機株式会社 | refrigerator |
| JP6140279B2 (en) * | 2013-06-07 | 2017-05-31 | 三菱電機株式会社 | Insulated box and refrigerator |
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| WO2017168571A1 (en) * | 2016-03-29 | 2017-10-05 | 三菱電機株式会社 | Refrigerator and manufacturing method for same |
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