【０００１】[0001]
【発明の属する技術分野】本発明は、冷蔵庫，冷凍庫、
及び冷凍倉庫等における断熱材に関するものである。TECHNICAL FIELD The present invention relates to a refrigerator, a freezer,
And heat insulating materials in freezer warehouses and the like.
【０００２】[0002]
【従来の技術】従来から冷蔵庫用の断熱材としては、内
箱と外箱の間に充填してなるウレタンフォームを断熱材
を採用しているが、ウレタンフォーム自体の断熱性能は
採用する発泡剤によりその熱伝導率が支配されているこ
とからさらに断熱性能を改善するには限界がある。現
在、採用されている硬質ウレタンフォームの熱伝導率
は、約１６〜１９（ｍＷ／ｍＫ）程度である。したがっ
て、さらに冷蔵庫の断熱性能を向上させるためには、内
部を減圧して熱伝導率を下げた真空断熱パネルが知られ
ており、その熱伝導率は７〜８（ｍＷ／ｍＫ）程度まで
下げられる。ここで、真空断熱パネルは減圧時における
変形防止のためにコア材としてシリカパウダーや連続気
泡の発泡ウレタンフォームを板状に切断加工したものが
用いられており、これに加え、減圧時に発生する水分や
ガス成分を吸収して真空度の劣化を防止するゲッター剤
が用いられることもある。これらコア材とゲッター剤を
アルミラミネートフィルムに予め封入し、全体を減圧真
引きされた後ラミネートフィルムを熱溶着して真空断熱
パネルが構成される。2. Description of the Related Art Conventionally, as a heat insulating material for refrigerators, a heat insulating material of urethane foam filled between an inner box and an outer box has been adopted. Therefore, there is a limit in further improving the heat insulating performance because the thermal conductivity is controlled by the thermal conductivity. At present, the thermal conductivity of the rigid urethane foam used is about 16 to 19 (mW / mK). Therefore, in order to further improve the heat insulating performance of the refrigerator, a vacuum heat insulating panel in which the inside is decompressed to reduce the heat conductivity is known, and the heat conductivity is reduced to about 7 to 8 (mW / mK). Can be Here, in order to prevent deformation during decompression, a vacuum insulation panel is used in which silica powder or open-cell urethane foam which is cut into a plate shape is used as a core material, and in addition to this, water generated during decompression is used. In some cases, a getter agent that absorbs a gas component and prevents deterioration of the degree of vacuum is used. The core material and the getter agent are pre-enclosed in an aluminum laminated film, and the whole is subjected to vacuum depressurization, and then the laminated film is thermally welded to form a vacuum heat insulating panel.
【０００３】このため、真空断熱パネル設置場所として
は形状が複雑で強度の乏しい内箱側よりも強度的に問題
がなく貼付作業性の優れた外箱内面に接着剤等で固定し
たのち外箱と内箱を組み立てそれらの間隙部分にウレタ
ンフォームを充填して冷蔵庫を製作する方法が一般的で
ある。また、外箱と内箱の中間に浮かして固定する方法
も考えられるが固定用部品の追加や貼付作業性が悪く自
動化に向かないことからコスト面で問題がある。この種
の真空断熱パネル貼付方法の代表な物に、特公昭61−91
481 号公報が挙げられる。ここで、真空断熱パネルは減
圧状態が維持されることで性能を確保できるが一旦真空
がリークして真空度が劣化すると性能がウレタンフォー
ム以上に極端に悪くなることが知られている。[0003] For this reason, as a place for installing the vacuum insulation panel, the outer box is fixed to the inner surface of the outer box which has no problem in strength and is excellent in sticking workability with an adhesive or the like as compared with the inner box having a complicated shape and poor strength. In general, a refrigerator is manufactured by assembling an inner box and filling a gap between them with urethane foam. In addition, a method of floating and fixing between the outer box and the inner box is also conceivable, but there is a problem in terms of cost because the addition of fixing parts and the sticking workability are not suitable for automation. A representative example of this type of vacuum insulation panel attaching method is Japanese Patent Publication No. 61-91.
No. 481. Here, it is known that the performance of the vacuum insulation panel can be ensured by maintaining the reduced pressure state, but once the vacuum leaks and the degree of vacuum deteriorates, the performance becomes extremely worse than that of urethane foam.
【０００４】したがって、前述の様に一旦発泡を完了す
ると真空断熱パネルは、ウレタンフォーム内に完全に密
封されることから真空のリーク等の不良品が発生すると
あとで修正や交換作業が困難となる。このため、真空断
熱パネル単体パネルでの真空度の確認や貼付作業時に穴
が発生しないように十分な配慮が必要であるが、真空断
熱パネルの貼付後に発生した真空のリークに関してはウ
レタンフォーム発泡を行った後では確認する方法がない
ためすべての真空断熱パネルについて信頼性を確保して
量産することが困難であった。Therefore, once foaming is completed as described above, the vacuum insulation panel is completely sealed in the urethane foam, so that if defective products such as vacuum leaks occur, it becomes difficult to repair or replace the product later. . For this reason, it is necessary to check the degree of vacuum on the vacuum insulation panel alone and take sufficient care not to create holes during the attachment work.However, urethane foam foaming is used for vacuum leaks that occur after the vacuum insulation panel is attached. Since there is no way to confirm after performing, it has been difficult to ensure the reliability and mass-produce all the vacuum insulation panels.
【０００５】[0005]
【発明が解決しようとする課題】真空断熱パネルを冷蔵
庫断熱材に採用した場合には、その真空度を維持させな
いとパネルの熱伝導率が当初設計の性能より低下し、庫
内の冷気で外箱表面まで冷やされ露付きが発生したり、
冷却性能に著しい劣化が見られたりと冷蔵庫としての基
本機能に大幅なダメージを与えてしまう。このため、真
空断熱パネルを組込む際には、各パネルの真空度が所定
の到達真空度で維持され正常な熱伝導率を発揮できるか
を確認することが必須である。ここで、真空断熱パネル
の検査方法としては、直接真空断熱パネルの熱伝導率を
測定する方法，真空断熱パネルの外側の空間を真空断熱
パネル内の到達真空度より減圧してパネルの変形を測定
し、真空断熱パネル内部の真空度を確認する逆真空検査
法、あるいはヘリウム等の不活性ガスをトレーサガスに
利用したヘリウムガスリーク検査方法等が一般的に知ら
れているが、いずれもパネル単独での検査しか実施する
ことが出来なかった。When a vacuum insulation panel is used as a refrigerator insulation material, unless the degree of vacuum is maintained, the thermal conductivity of the panel becomes lower than the originally designed performance, and the outside air is cooled by cold air in the refrigerator. It is cooled down to the surface of the box, causing dew,
If the cooling performance is significantly deteriorated, the basic function of the refrigerator will be greatly damaged. For this reason, when assembling the vacuum insulation panels, it is essential to check whether the degree of vacuum of each panel is maintained at a predetermined ultimate degree of vacuum and a normal thermal conductivity can be exhibited. Here, as a method of inspecting the vacuum insulation panel, a method of directly measuring the thermal conductivity of the vacuum insulation panel, and measuring the deformation of the panel by reducing the space outside the vacuum insulation panel from the ultimate vacuum in the vacuum insulation panel. A reverse vacuum inspection method for confirming the degree of vacuum inside the vacuum insulation panel or a helium gas leak inspection method using an inert gas such as helium as a tracer gas is generally known. Could only be performed.
【０００６】そこで、真空断熱パネル単体の検査を終了
した後のハンドリングや硬質ウレタンフォーム発泡工程
内で発生した破損や漏れに関しては確認が不可能であっ
た。また、一度硬質ウレタンフォーム発泡を実施すると
真空断熱パネルの交換作業は硬質ウレタンフォームの接
着力が強いため困難で箱体全体を交換することになり、
冷蔵庫の生産時における品質確保に多大の損害を発生さ
せる。このため、硬質ウレタンフォーム発泡を終了した
箱体完成品の段階で、内部の真空断熱パネルを全数検査
できるようにすることは、重要な課題である。そこで、
本発明の目的は上記課題を解決するため、真空断熱パネ
ルを設置して硬質ウレタンフォームを充填完了した冷蔵
庫完成品の段階で外部から真空断熱パネルの到達真空度
を全数検査可能にして、信頼性を向上させた真空断熱パ
ネル組込冷蔵庫を提供することにある。Therefore, it is impossible to confirm the handling or the breakage or leakage occurring in the rigid urethane foam foaming process after the inspection of the vacuum insulation panel alone is completed. Also, once the hard urethane foam foaming is performed, the replacement work of the vacuum insulation panel is difficult because the adhesive strength of the hard urethane foam is strong, and the entire box body will be replaced,
It causes great damage to quality assurance during refrigerator production. For this reason, it is an important subject to be able to inspect all the vacuum insulation panels inside at the stage of a box finished product after foaming of rigid urethane foam is completed. Therefore,
The object of the present invention is to solve the above-mentioned problems by installing a vacuum insulation panel and completely checking the ultimate vacuum degree of the vacuum insulation panel from the outside at the stage of a completed refrigerator in which hard urethane foam is completely filled, thereby improving reliability. Another object of the present invention is to provide a vacuum-insulated panel-incorporated refrigerator having an improved refrigerator.
【０００７】[0007]
【課題を解決するための手段】上記目的は、冷蔵庫外箱
内側に真空断熱パネルを設置し、そのパネル貼付面であ
る外箱に真空断熱パネルと外気を貫通する穴を設置する
ことによりパネル表面を外部から確認可能とすることに
より解決できる。すなわち、前記従来技術のように、外
箱鉄板に真空断熱パネルを貼付けて硬質ウレタンフォー
ムを充填した場合には、硬質ウレタンフォームが接着剤
の働きをして真空断熱パネルを包み込みシーリング固定
される。SUMMARY OF THE INVENTION The object of the present invention is to provide a vacuum insulation panel inside a refrigerator outer box, and to provide a vacuum insulation panel and a hole through the outside air in an outer box, which is a panel attaching surface thereof, so as to provide a panel surface. Can be solved by making it possible to confirm from outside. That is, when the vacuum insulation panel is attached to the outer box iron plate and the hard urethane foam is filled as in the conventional technique, the rigid urethane foam acts as an adhesive, wraps the vacuum insulation panel, and is fixed by sealing.
【０００８】このため、冷蔵庫外箱の鉄板表面を真空断
熱パネル内部の到達真空度より下げていくと、真空断熱
パネルがラミネートフィルムと連続気泡硬質ウレタンフ
ォームから成るコア材で構成されているため貫通穴部分
で圧力差が発生するとパネルのラミネートフィルムだけ
が膨張し始める。従って、この貫通穴部分のラミネート
フィルム部分の変位を測定して、変形が始まる時点での
真空到達度を測定すれば、真空断熱パネル内部の現状の
到達真空度を知ることができる。For this reason, when the surface of the iron plate of the outer box of the refrigerator is made lower than the ultimate vacuum inside the vacuum heat insulating panel, the vacuum heat insulating panel is formed by a core material composed of a laminated film and open-celled rigid urethane foam. When a pressure difference occurs in the hole, only the laminate film of the panel starts to expand. Therefore, by measuring the displacement of the laminated film portion in the through-hole portion and measuring the degree of vacuum reached at the time when the deformation starts, the current reached degree of vacuum inside the vacuum insulation panel can be known.
【０００９】以上の方法によれば、冷蔵庫の最終組立工
程において真空断熱パネルを簡単に全数検査することが
可能となり製品としての信頼性を十分に確認して製品と
して出荷できる。According to the above method, it is possible to easily inspect all the vacuum insulation panels in the final assembly process of the refrigerator, and it is possible to sufficiently confirm the reliability of the product and ship it as a product.
【００１０】ここで、真空度検査用の貫通穴の周辺部分
に外箱鉄板と真空断熱パネルラミネートフィルム表面の
間隙をシールするように真空用シーリング剤や接着剤、
あるいは真空用Ｏリングを設置すれば外箱表面側を真空
排気して所定の真空度まで達成するまでの時間をさらに
短縮でき効率良く真空断熱パネルの検査ができる。Here, a vacuum sealing agent or an adhesive is provided so as to seal a gap between the outer case iron plate and the surface of the vacuum heat insulating panel laminated film around the through hole for vacuum degree inspection.
Alternatively, if a vacuum O-ring is provided, the time required for evacuation of the outer case surface side to achieve a predetermined degree of vacuum can be further shortened, and the vacuum insulation panel can be inspected efficiently.
【００１１】さらに、外箱鉄板に設置した貫通穴の周辺
部分に変形防止用の絞り加工を施してあれば、貫通穴周
辺部分を真空排気した際に発生する外箱鉄板面の変形を
防止でき、貫通穴部分の真空断熱パネル表面の変形度を
精密に測定可能となり、さらに、信頼性を向上させた全
数検査が可能となる。Further, if the peripheral portion of the through hole provided in the outer case iron plate is subjected to drawing processing for preventing deformation, deformation of the outer case iron plate surface which occurs when the peripheral portion of the through hole is evacuated can be prevented. In addition, the degree of deformation of the surface of the vacuum heat insulating panel at the through hole can be accurately measured, and a 100% inspection with improved reliability can be performed.
【００１２】[0012]
【発明の実施の形態】以下本発明の一実施例を図１から
図８により説明する。図１は、冷蔵庫用の断熱箱体に適
用を図った実施例の斜視図である。図１において、外箱
１とプラスチック製の内箱２の間隙部分の外箱鉄板内側
面側に真空断熱パネル４が貼付けられており、それぞれ
の真空断熱パネル４の表面が外部から確認できるように
貫通穴５が設置してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of an embodiment applied to a heat insulating box for a refrigerator. In FIG. 1, vacuum insulation panels 4 are adhered to the inner surface of the outer box iron plate in the gap between the outer box 1 and the inner box 2 made of plastic so that the surface of each vacuum insulation panel 4 can be confirmed from the outside. A through hole 5 is provided.
【００１３】ここで、真空断熱パネル４は、図２に示す
ように外箱２の内側面側に通常ホットメルト接着剤ある
いは両面テープ等で固定された後内箱３と組立てられ、
硬質ウレタンフォーム６が空隙部分に充填される。従っ
て、真空断熱パネル４は、硬質ウレタンフォーム６で完
全に覆われた形で断熱箱体を形成していることになる。
したがって、従来の方法では、硬質ウレタンフォーム６
に埋められた後で真空断熱パネル４の性能を保証する手
段がなかった。Here, the vacuum insulation panel 4 is fixed to the inner side of the outer box 2 with a hot melt adhesive or a double-sided tape as shown in FIG.
The rigid urethane foam 6 is filled in the gap. Accordingly, the vacuum heat insulating panel 4 forms a heat insulating box in a form completely covered with the rigid urethane foam 6.
Therefore, in the conventional method, the rigid urethane foam 6
There was no means to guarantee the performance of the vacuum insulation panel 4 after being buried.
【００１４】このため、本実施例では、外箱２のＡ部に
外部と真空断熱パネル４がつながる貫通穴５を設置し
て、真空断熱パネル４の到達真空度が外からも確認でき
るようにしたものである。すなわち、図３の拡大断面図
のように真空断熱パネル４の外包材を形成するラミネー
トフィルム７の表面状態が貫通穴５を通して外部から確
認できるようになっている。For this reason, in the present embodiment, a through-hole 5 is provided in part A of the outer box 2 to connect the outside and the vacuum insulation panel 4 so that the ultimate vacuum degree of the vacuum insulation panel 4 can be checked from the outside. It was done. That is, as shown in the enlarged sectional view of FIG. 3, the surface state of the laminate film 7 forming the outer packaging material of the vacuum heat insulating panel 4 can be confirmed from the outside through the through hole 5.
【００１５】図４は、真空断熱パネル４の断面図で真空
断熱パネル４内部の構成を示した物である。通常、真空
断熱パネル４の外包容器としては、５ミクロンメータか
ら１０ミクロンメータの厚さのアルミニウム箔にその容
器内面ヒートシール面としてプラスチックスのフィルム
を組合せたラミネートフィルム７が使用される。また、
コア材８につていは、シリカパウダーや連続気泡ウレタ
ンフォームを板状に切断加工したものが用いられてお
り、さらに減圧時に真空断熱パネル４内部に発生する水
分やガス成分及びラミネートフィルム７から浸入してく
る水分やガス分を吸収して真空度の劣化を防止するゲッ
ター剤９が用いられることもある。これらコア材８とゲ
ッター剤９を前記アルミラミネートフィルム７に予め封
入した後全体を減圧真引きされた状態でラミネートフィ
ルム７外周部を熱溶着により密封される。ここで、真空
封止する際の真空断熱パネル内部の到達真空度は、約0.
1Torr程度が量産性と性能のバランスを考慮すると好ま
しい。FIG. 4 is a cross-sectional view of the vacuum heat insulating panel 4 showing the structure inside the vacuum heat insulating panel 4. Usually, as the outer container of the vacuum insulation panel 4, a laminated film 7 in which an aluminum foil having a thickness of 5 μm to 10 μm is combined with a plastic film as a heat sealing surface on the inner surface of the container is used. Also,
As the core material 8, a material obtained by cutting silica powder or open-cell urethane foam into a plate shape is used, and furthermore, water and gas components generated inside the vacuum heat insulating panel 4 when depressurized, and permeation from the laminate film 7. The getter agent 9 which absorbs the moisture and gas which comes in and prevents the degree of vacuum from deteriorating may be used. After the core material 8 and the getter agent 9 are sealed in the aluminum laminated film 7 in advance, the outer periphery of the laminated film 7 is sealed by heat welding in a state where the whole is evacuated and evacuated. Here, the ultimate vacuum degree inside the vacuum insulation panel at the time of vacuum sealing is about 0.
About 1 Torr is preferable in consideration of the balance between mass productivity and performance.
【００１６】図５は、貫通穴５周辺部の外箱鉄板２と真
空断熱パネル４のラミネートフィルム７面の間隙に真空
シール材９Ａを設置し、外箱鉄板２の表側を真空排気し
た場合の排気効率を向上させた実施例である。真空シー
ル材９Ａとしては、エラストマ−ガスケットがそれほど
強い接触圧を要さずシール面に追従させることが可能で
あるためラミネートフィルム７に傷つき等を発生させる
ことなく真空シール可能である。特に、この真空シール
材９Ａを貫通穴５の近傍外周部分に設置しておけば、真
空保持させたい貫通穴５から露出しているラミネートフ
ィルム７面までの空間を最小限にでき、真空排気時間が
大幅に短縮できる。FIG. 5 shows a case where a vacuum sealing material 9A is installed in a gap between the outer box iron plate 2 around the through hole 5 and the surface of the laminated film 7 of the vacuum heat insulating panel 4, and the front side of the outer box iron plate 2 is evacuated. This is an embodiment in which the exhaust efficiency is improved. As the vacuum sealing material 9A, the elastomer gasket can follow the sealing surface without requiring a very strong contact pressure, so that vacuum sealing can be performed without causing any damage to the laminated film 7. In particular, if the vacuum seal material 9A is provided in the outer peripheral portion near the through hole 5, the space from the through hole 5 to be held in vacuum to the surface of the laminated film 7 exposed can be minimized. Can be greatly reduced.
【００１７】図６にて、実施例の構造における真空断熱
パネル４の信頼性確認方法を説明する。前述のように、
真空断熱パネル４の全数検査用の貫通穴５を設置した、
硬質ウレタンフォーム６発泡の完了した冷蔵庫の外箱鉄
板２面を真空断熱パネル４の到達真空度以下になるよう
にするため、貫通穴５をカバーできるような真空容器と
真空排気ポンプを持った到達真空度検査装置１１を利用
する。Referring to FIG. 6, a method for confirming the reliability of the vacuum insulation panel 4 in the structure of the embodiment will be described. As aforementioned,
A through hole 5 for 100% inspection of the vacuum insulation panel 4 was installed.
Rigid urethane foam 6 In order to make the surface of the outer steel plate 2 of the refrigerator in which foaming is completed to be less than the ultimate vacuum degree of the vacuum insulation panel 4, a vacuum container capable of covering the through hole 5 and a vacuum exhaust pump are provided. The vacuum degree inspection device 11 is used.
【００１８】到達真空度検査装置１１の外箱鉄板２と接
触するフランジ面には、外箱真空シール材１０が設置さ
れており、到達真空度検査装置１１を外箱鉄板２に押し
付けた後、真空排気ポンプ１２により容器内が減圧され
る。ここで、到達真空度検査装置１１の内部には貫通穴
５から露出しているラミネートフィルム７面の変形を測
定できるように変位センサー１３が組み込まれており、
真空排気と同時に変位センサー１３からラミネートフィ
ルム７面までの距離Ｂを測定する。ここで、正常の真空
断熱パネル４内部の到達真空度は、約０.１Torr 程度に
保持されているため、外箱鉄板２部分に設置した貫通穴
５部分を前記到達真空度検査装置１１等を利用して減圧
して行くと真空断熱パネル４内部とラミネートフィルム
７表面側で圧力差が徐々に小さくなって行き、圧力がバ
ランスした後に真空断熱パネル４表面の真空度が真空断
熱パネル４内部の真空度より下がってくるとその差圧に
より、図のように貫通穴５部分のラミネートフィルム７
面を押し上げる力が発生してくる。従って、前述のよう
に貫通穴５のラミネートフィルム７面の変位を連続的に
把握しておれば、貫通穴５部分のラミネートフィルム７
に発生する変形がいつ開始したかを容易に確認でき、そ
の時点における到達真空度検査装置１１の真空容器内真
空度を読みとれば、冷蔵庫断熱箱体の中に埋め込まれた
真空断熱パネル４内部の到達真空度が判る。ここで、貫
通穴５は、外観上目立たない３〜５mm程度の大きさで十
分判定が可能である。An outer case vacuum sealing material 10 is provided on the flange surface of the ultimate vacuum degree inspection device 11 which comes into contact with the outer case iron plate 2. After the ultimate vacuum degree inspection device 11 is pressed against the outer case iron plate 2, The inside of the container is depressurized by the evacuation pump 12. Here, a displacement sensor 13 is incorporated in the ultimate vacuum degree inspection device 11 so as to measure the deformation of the surface of the laminated film 7 exposed from the through hole 5.
At the same time as evacuation, the distance B from the displacement sensor 13 to the surface of the laminate film 7 is measured. Here, since the ultimate vacuum degree inside the normal vacuum insulation panel 4 is maintained at about 0.1 Torr, the through-hole 5 portion provided in the outer box iron plate 2 portion is connected to the ultimate vacuum degree inspection device 11 and the like. When the pressure is reduced using the vacuum insulation panel 4, the pressure difference between the inside of the vacuum insulation panel 4 and the surface of the laminate film 7 gradually decreases, and after the pressure is balanced, the degree of vacuum on the surface of the vacuum insulation panel 4 is reduced. When the pressure drops below the degree of vacuum, the pressure difference causes the laminate film 7 in the through hole 5 as shown in the figure.
A force that pushes up the surface is generated. Accordingly, if the displacement of the surface of the laminated film 7 of the through hole 5 is continuously grasped as described above, the laminated film 7 in the portion of the through hole 5 can be obtained.
When the deformation occurring in the vacuum insulation panel 4 embedded in the refrigerator heat insulation box 4 can be easily confirmed, and the degree of vacuum in the vacuum container of the ultimate vacuum degree inspection device 11 at that time is read. You can see the ultimate vacuum. Here, it is possible to sufficiently determine the through hole 5 with a size of about 3 to 5 mm that is not noticeable in appearance.
【００１９】また、真空断熱パネル４全体や冷蔵庫箱体
全体を真空下に置くことなく調査が可能となり、到達真
空度検査装置１１も極めてコンパクトに設計可能とな
り、量産時における真空排気時間も短くできることか
ら、硬質ウレタンフォーム６発泡完了した断熱箱体に埋
められた真空断熱パネル４の到達真空度を効率良く検査
できる。In addition, it is possible to conduct an investigation without placing the entire vacuum insulation panel 4 and the entire refrigerator box under vacuum, and the ultimate vacuum degree inspection device 11 can be designed to be extremely compact, and the evacuation time during mass production can be shortened. Therefore, the ultimate vacuum degree of the vacuum insulation panel 4 buried in the heat insulation box body in which the foaming of the rigid urethane foam 6 is completed can be efficiently inspected.
【００２０】さらに、図７（ａ），（ｂ）に示すように
貫通穴５の周辺部の外箱鉄板２に絞り部１４の加工を施
した場合には、さらに貫通穴５部分の強度を上げること
ができ前述のように貫通穴５部分を真空排気したときの
外箱鉄板２の変形を抑さえることができ、貫通穴５部分
の真空断熱パネル４表面のラミネートフィルム７で発生
する微少な変形を精密に測定可能になる。Further, as shown in FIGS. 7A and 7B, when the outer box iron plate 2 around the through hole 5 is subjected to the processing of the drawing portion 14, the strength of the through hole 5 is further reduced. As described above, it is possible to suppress deformation of the outer box iron plate 2 when the through hole 5 is evacuated as described above, and it is possible to suppress minute deformation generated in the laminated film 7 on the surface of the vacuum heat insulating panel 4 at the through hole 5. Deformation can be measured precisely.
【００２１】以上の実施例により、測定された真空断熱
パネル４表面の変形量と真空度の測定結果を図８に示
す。到達真空度を下げていくと約０.１Torr の所で真空
断熱パネル４のラミネートフィルム７表面が大きく変形
してくることが明らかである。このことからこの真空断
熱パネル４の内部の到達真空度は約０.１Torr であるこ
とが判り、真空断熱パネル４としての性能を満足してい
ることが確認される。同様に、他の真空断熱パネル４に
ついてもそれぞれに設置した到達真空度確認用の貫通穴
５を利用して真空断熱パネル４内の到達真空度を簡単に
検査することが可能となり冷蔵庫としての信頼性を確保
できる。FIG. 8 shows the measurement results of the amount of deformation and the degree of vacuum of the surface of the vacuum insulation panel 4 measured by the above embodiment. It is apparent that as the ultimate vacuum degree is reduced, the surface of the laminated film 7 of the vacuum heat insulating panel 4 is greatly deformed at about 0.1 Torr. From this, it can be seen that the ultimate degree of vacuum inside the vacuum insulation panel 4 is about 0.1 Torr, and it is confirmed that the performance as the vacuum insulation panel 4 is satisfied. Similarly, with respect to the other vacuum insulation panels 4, it is possible to easily inspect the ultimate vacuum degree in the vacuum insulation panel 4 by using the through-holes 5 for confirming the ultimate vacuum degree provided in each of the vacuum insulation panels 4. Nature can be secured.
【００２２】[0022]
【発明の効果】本発明によれば、外箱に貼付けられた真
空断熱パネルの到達真空度を外箱鉄板に貫通した穴を設
置することで硬質ウレタンフォーム発泡の完了した冷蔵
庫完成品の段階で、外部より真空断熱パネルの内部到達
真空度の状態を簡単に全数検査することが可能となり真
空断熱パネルを搭載した断熱箱体の信頼性を飛躍的に高
めることが可能である。According to the present invention, the ultimate vacuum degree of the vacuum insulation panel attached to the outer box is determined by installing a hole penetrating the iron plate of the outer box at the stage of a completed refrigerator product in which rigid urethane foam foaming is completed. In addition, it is possible to easily and completely inspect the state of the degree of vacuum reached inside the vacuum insulation panel from the outside, and it is possible to dramatically improve the reliability of the heat insulation box body equipped with the vacuum insulation panel.
【図１】本発明の冷蔵庫用断熱箱体の斜視図である。FIG. 1 is a perspective view of a heat insulating box for a refrigerator according to the present invention.
【図２】本発明の冷蔵庫用断熱箱体の横断面の平面図で
ある。FIG. 2 is a plan view of a transverse section of the heat insulating box for a refrigerator of the present invention.
【図３】本発明の冷蔵庫用断熱箱体の外箱鉄板に設置し
た貫通穴周辺部分の詳細断面図である。FIG. 3 is a detailed cross-sectional view of a portion around a through hole installed on an outer box iron plate of the heat insulating box for a refrigerator of the present invention.
【図４】本発明で使用される真空断熱パネルの断面構造
図である。FIG. 4 is a sectional structural view of a vacuum heat insulating panel used in the present invention.
【図５】本発明の冷蔵庫用断熱箱体の外箱鉄板に設置し
た貫通穴の詳細断面図である。FIG. 5 is a detailed cross-sectional view of a through hole installed in an outer case iron plate of the heat insulating box for a refrigerator of the present invention.
【図６】本発明の冷蔵庫用断熱箱体の外箱鉄板に設置し
た到達真空度検査装置の到達真空度を検査している状態
の詳細断面図である。FIG. 6 is a detailed cross-sectional view of a state in which the ultimate vacuum degree is inspected by the ultimate vacuum degree inspection device installed on the outer case iron plate of the heat insulating box body for refrigerator of the present invention.
【図７】本発明の冷蔵庫用断熱箱体の外箱鉄板の平面図
（ａ）とそのＣ−Ｃ′断面図（ｂ）である。FIG. 7 is a plan view (a) of an outer box iron plate of a heat insulating box body for a refrigerator according to the present invention and a cross-sectional view taken along the line CC '(b).
【図８】本発明の真空断熱パネル表面のラミネートフィ
ルム面に発生する変形量と真空度の関係を測定した図で
ある。FIG. 8 is a diagram illustrating a relationship between a degree of deformation and a degree of vacuum generated on a laminate film surface on the surface of the vacuum heat insulating panel of the present invention.
１…断熱箱体、２…外箱、３…内箱、４…真空断熱パネ
ル、５…貫通穴、６…硬質ウレタンフォーム、７…ラミ
ネートフィルム、８…コア材、９…真空シール材、１０
…外箱真空シール材、１１…到達真空度検査装置、１２
…真空排気用ポンプ、１３…変位センサー、１４…絞り
部、１５…変位点。DESCRIPTION OF SYMBOLS 1 ... Insulated box, 2 ... Outer box, 3 ... Inner box, 4 ... Vacuum insulation panel, 5 ... Through hole, 6 ... Hard urethane foam, 7 ... Laminated film, 8 ... Core material, 9 ... Vacuum sealing material, 10
... outer box vacuum sealing material, 11 ... ultimate vacuum degree inspection device, 12
... Vacuum pump, 13 ... Displacement sensor, 14 ... Throttle section, 15 ... Displacement point.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10129097AJPH10292984A (en) | 1997-04-18 | 1997-04-18 | refrigerator |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10129097AJPH10292984A (en) | 1997-04-18 | 1997-04-18 | refrigerator |
| Publication Number | Publication Date |
|---|---|
| JPH10292984Atrue JPH10292984A (en) | 1998-11-04 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10129097APendingJPH10292984A (en) | 1997-04-18 | 1997-04-18 | refrigerator |
| Country | Link |
|---|---|
| JP (1) | JPH10292984A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10164004A1 (en)* | 2001-12-28 | 2003-07-17 | Zae Bayern | Non-destructive method for testing vacuum insulation panels, whereby panels have a small coarse insert within their micro-porous insulation core that has different, detectable, heat transfer behavior to that of the main core |
| JP2012112606A (en)* | 2010-11-26 | 2012-06-14 | Rinnai Corp | Insulation hot water storage device |
| JP2012132585A (en)* | 2010-12-20 | 2012-07-12 | Toshiba Corp | Refrigerator |
| EP1625338B1 (en) | 2003-05-19 | 2020-02-12 | va-Q-tec AG | Heat insulated container |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10164004A1 (en)* | 2001-12-28 | 2003-07-17 | Zae Bayern | Non-destructive method for testing vacuum insulation panels, whereby panels have a small coarse insert within their micro-porous insulation core that has different, detectable, heat transfer behavior to that of the main core |
| DE10164004B4 (en)* | 2001-12-28 | 2005-07-14 | Bayerisches Zentrum für Angewandte Energieforschung e.V. | Vacuum insulation panel and method for measuring the internal pressure thereof |
| EP1625338B1 (en) | 2003-05-19 | 2020-02-12 | va-Q-tec AG | Heat insulated container |
| EP1625338B2 (en)† | 2003-05-19 | 2023-04-12 | va-Q-tec AG | Heat insulated container |
| JP2012112606A (en)* | 2010-11-26 | 2012-06-14 | Rinnai Corp | Insulation hot water storage device |
| JP2012132585A (en)* | 2010-12-20 | 2012-07-12 | Toshiba Corp | Refrigerator |
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|---|---|---|
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