JPH0794951B2 - Vacuum insulation - Google Patents
Vacuum insulationInfo
- Publication number
- JPH0794951B2 JPH0794951B2 JP28019390A JP28019390A JPH0794951B2 JP H0794951 B2 JPH0794951 B2 JP H0794951B2 JP 28019390 A JP28019390 A JP 28019390A JP 28019390 A JP28019390 A JP 28019390A JP H0794951 B2 JPH0794951 B2 JP H0794951B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- insulating material
- vacuum
- vacuum heat
- outer shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Refrigerator Housings (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は，家庭用電気冷蔵庫，冷凍庫等に利用される真
空断熱材に関するものである。TECHNICAL FIELD The present invention relates to a vacuum heat insulating material used for household electric refrigerators, freezers and the like.
［従来の技術］ 一般的に家庭用電気冷蔵庫，冷凍庫等の断熱材として硬
質ポリウレタンフォームが使用されているが，この場
合，熱伝導率が最高のものでも0.013Kcal/mhr℃程度で
あり，ポリウレタンフォームでは現状の容積効率を上げ
ることは難しい。この点を解消するため，真空断熱材と
称し，通気性のないプラスチックフィルムの内部に微粉
末又は，連続気孔率の高いプラスチックフォームを収容
し，内部を真空排気した後，フィルムの開口部を熱融着
した真空断熱材が開発されている。この断熱材は熱伝導
率が,0.004〜0.006Kcal/mhr℃と従来のポリウレタンフ
ォームと比較して，断熱性能が約３倍優れている。[Prior Art] Generally, a rigid polyurethane foam is used as a heat insulating material for household electric refrigerators, freezers, etc. In this case, even the highest thermal conductivity is about 0.013 Kcal / mhr ° C. It is difficult to increase the current volumetric efficiency with foam. In order to eliminate this point, it is called a vacuum heat insulating material, in which fine powder or plastic foam with high continuous porosity is housed inside a non-breathable plastic film, and the inside of the film is evacuated and then the opening of the film is heated. Fused vacuum insulation has been developed. This heat insulating material has a thermal conductivity of 0.004 to 0.006 Kcal / mhr ° C, which is three times better than conventional polyurethane foam.
第３図は，例えば特開平１−52261号公報に示された従
来の真空断熱材を示す図であり，図において，（１）は
袋，（２）は断熱材，（５）は金属中間層，（６）はプ
ラスチック表面層，（７）は接着剤層より構成されてい
る。しかし，この真空断熱材は表面がプラスチックフィ
ルムであるために強度が弱く前記真空断熱材を利用して
箱体構造を形成する場合は表面材（図示してない）が必
要で，施工方法としては，鋼板又は合成樹脂に両面接着
テープ又は，接着剤等を用いてプラスチックフィルムに
張りつけ，断熱材同士の間に形成される隙間はポリウレ
タンフォーム等を充填して使用せざるを得なかった。こ
の工程の最中に，真空断熱材の表面のプラスチックフィ
ルムに傷を付けやすく，傷がピンホールの場合，その箇
所から空気が徐々に内部に侵入し数時間もかかって内部
が大気圧に達するため，そのスローリークに気付かない
ままでポリウレタンフォーム等を充填してしまうケース
が多かった。またこういった前工程のストック状態で
も，真空断熱材の間に誤って異物を混入したままで積み
重ねていた場合，異物が鋭利な時，真空断熱材同士の摩
擦による傷のためスローリークが発生し，そのリークが
外観上観察し難いためそのまま気ずかずに使用してしま
うといった事情が多かった。こういった事態に鑑み，製
品の品質管理の一手段として，第４図に示すような特開
昭61−107126号公報に示された真空パック式断熱材の真
空度測定装置が考えられた。FIG. 3 is a diagram showing a conventional vacuum heat insulating material disclosed in, for example, Japanese Patent Application Laid-Open No. 1-52261, in which (1) is a bag, (2) is a heat insulating material, and (5) is a metal intermediate material. The layer, (6) is a plastic surface layer, and (7) is an adhesive layer. However, since the surface of this vacuum heat insulating material is a plastic film, its strength is weak, and a surface material (not shown) is required when forming a box structure using the vacuum heat insulating material. , A steel plate or a synthetic resin is attached to a plastic film by using a double-sided adhesive tape or an adhesive agent, and the gap formed between the heat insulating materials has to be filled with polyurethane foam or the like for use. During this process, the plastic film on the surface of the vacuum heat insulating material is easily scratched, and if the scratch is a pinhole, the air gradually intrudes into the inside from that location and it takes several hours to reach the atmospheric pressure inside. Therefore, in many cases, polyurethane foam or the like was filled without noticing the slow leak. Even in such a stock state of the previous process, when foreign substances are mistakenly mixed between the vacuum heat insulating materials and stacked, a slow leak occurs due to scratches caused by friction between the vacuum heat insulating materials when the foreign materials are sharp. However, there are many circumstances in which the leak is difficult to observe from the outside and it is used without any notice. In view of such a situation, as a means for quality control of products, a vacuum pack type vacuum measuring device for a heat insulating material shown in Japanese Patent Laid-Open No. 61-107126 as shown in FIG. 4 has been considered.
図において真空断熱材（13）を，チャンバー（９），の
中に組み込まれた台（14），の上にセットし，チヤンバ
ー内の真空度を真空断熱材の圧力以下に下げることによ
り，外包材（13a），が充填材から剥離し，さらに膨張
し始めるために上部に設置した位置センサー（15），に
接触することによりチャンバー外の表示計で外部でその
変位を読み取ることができるように考えだされたもので
ある。In the figure, the vacuum heat insulating material (13) is set on the chamber (9) and the stand (14) incorporated in the chamber, and the vacuum degree in the chamber is reduced to the pressure of the vacuum heat insulating material or less, thereby enclosing the outer envelope. The material (13a) is separated from the filling material and comes into contact with the position sensor (15) installed at the upper part to start further expansion so that the displacement can be read externally by the indicator outside the chamber. It was thought out.
この装置により，予めプラスチックフィルムの変位量と
真空度の関係をつかんでおけば製品の管理基準以下の製
品について取り除くことが可能となった。With this device, if the relationship between the displacement of the plastic film and the degree of vacuum is grasped beforehand, it is possible to remove products below the product management standard.
また，第２の従来例として実開昭61−71894号公報およ
び実開昭61−71895号公報があり，真空断熱材内部に真
空センサーを内蔵して，真空度を容易に検出出来るよう
にしたものである。Also, as a second conventional example, there are Japanese Utility Model Laid-Open No. 61-71894 and Japanese Utility Model Laid-Open No. 61-71895, and a vacuum sensor is built in the vacuum heat insulating material so that the degree of vacuum can be easily detected. It is a thing.
［発明が解決しようとする課題］ 従来の真空断熱材は，真空度を検出するには特別な真空
度測定装置が必要であった。[Problems to be Solved by the Invention] The conventional vacuum heat insulating material requires a special vacuum degree measuring device to detect the degree of vacuum.
本発明は，こういった特別な装置を必要とせず簡易的に
目視で簡単に真空断熱材の性能を全ての工程にわたって
迅速に判断でき，しかも製造コストも殆どアップしない
真空断熱材を提供することを発明の目的としている。The present invention provides a vacuum heat insulating material which does not require such a special device and allows the performance of the vacuum heat insulating material to be quickly and easily judged through all the steps, and the manufacturing cost is hardly increased. Is the object of the invention.
［課題を解決するための手段］ この発明における真空断熱材は，アルミ箔とプラスチッ
クフィルム又はアルミ蒸着プラスチックフィルムを積層
したプラスチックラミネートフィルムからなる外殻袋
と，この外殻袋に収納され，真空状態でガスを発生しに
くい充填材と，前記外殻袋と充填材の間に設けられ，反
発弾性力の大きいリーク検出体とを備え，前記外殻袋は
内部を真空排気した後，開口部を密封したものである。[Means for Solving the Problems] A vacuum heat insulating material in the present invention is an outer shell bag made of a plastic laminate film in which an aluminum foil and a plastic film or an aluminum vapor-deposited plastic film are laminated, and a vacuum state stored in the outer shell bag. And a leak detector provided between the outer shell bag and the filler and having a large repulsive elastic force. The outer shell bag is evacuated to form an opening. It is hermetically sealed.
［作用］ 本発明における真空断熱材は，もし真空断熱材に何らか
のリークが発生した場合にリーク検出体の内部からの反
発力により，外殻体が押し上げられリーク検出体を収容
している箇所が膨張し簡単に目視でリークした真空断熱
材と明らかに判断できる。[Operation] In the vacuum heat insulating material according to the present invention, if any leak occurs in the vacuum heat insulating material, the repulsive force from the inside of the leak detecting body pushes up the outer shell body so that the location where the leak detecting body is housed is It can be clearly judged as a vacuum insulation material that has expanded and leaked easily by visual inspection.
従来ポリウレタンフォームの充填工程で，真空断熱材の
リークの確認ができないまま施工を行ってきたが，事前
に且つ容易に真空断熱材の不良品を見つけることが可能
となった。Conventionally, in the filling process of polyurethane foam, the work was performed without confirming the leak of the vacuum insulation material, but it is now possible to easily find defective vacuum insulation material in advance.
［実施例］ 以下に本発明の実施例を図について説明する。第１図に
おいて，（13）は本発明の真空断熱材，（16）は気密性
を有するプラスチックフィルムからなる外殻体，（17）
はこの外殻体（16）内に気密的に収容された真空状態で
ガスを発生しない充填材例えば無機質微粉末又は連続気
孔成形体，（18）は反発弾性力が大きく，リーク検知を
可能とするリーク検出体である，例えば軟質プラスチッ
クフォーム又は繊維状断熱材である。外殻体（16）のプ
ラスチックフィルムとしては，アルミ箔又はアルミ蒸着
フイルムを積層したプラスチックラミネートフィルムが
良い。EXAMPLES Examples of the present invention will be described below with reference to the drawings. In FIG. 1, (13) is the vacuum heat insulating material of the present invention, (16) is an outer shell made of airtight plastic film, (17)
Is a filler that is hermetically housed in the outer shell (16) and does not generate gas in a vacuum state, such as an inorganic fine powder or a continuous pore molded body, and (18) has a large impact resilience and enables leak detection. The leak detector is, for example, soft plastic foam or fibrous heat insulating material. The plastic film of the outer shell (16) is preferably a plastic laminate film in which aluminum foil or aluminum vapor deposition film is laminated.
またリーク検出体（18）の軟質プラスチックフォームの
種類としては，連続気孔を有する軟質ポリウレタンフォ
ーム，軟質ポリウレタンフォーム，軟質ポリ塩化ビニル
フォーム，軟質メラミンフォーム，軟質ポリイミドフォ
ーム等が良い。また軟質プラスチックフォームの密度と
しては大気圧で容易に圧縮され且つ反発弾性力が大き
く,10〜40kg/m3のものが良い、また繊維状断熱材として
は，密度が100kg/m3以下のグラスウール，セラミックフ
ァイバー，ロックウール等が良い。更に充填材（17）の
無機質微粉末としては，単粒子径が１μｍ以下のシリカ
が良く，また連続気孔成形体としては硬質ポリウレタン
フォーム，硬質フェノールフォーム，硬質フェノールウ
レタンフォーム等，またこれらを焼成したカーボンフォ
ームを使用するものである。The type of soft plastic foam of the leak detector (18) is preferably soft polyurethane foam having continuous pores, soft polyurethane foam, soft polyvinyl chloride foam, soft melamine foam, soft polyimide foam, or the like. As the density of the soft plastic foam easily compressed and rebound elasticity greater at atmospheric pressure, a good thing 10~40kg / m 3, and as the fibrous heat insulating material, density 100 kg / m 3 or less of the glass wool , Ceramic fiber, rock wool, etc. are good. Further, as the inorganic fine powder of the filler (17), silica having a single particle diameter of 1 μm or less is preferable, and as the continuous pore molded body, hard polyurethane foam, hard phenol foam, hard phenol urethane foam, etc. It uses carbon foam.
またリーク検出体（18）の挿入方法としては，予め無機
質微粉末の成形体を収容した紙（例えばクラフト紙），
又は不織布で作られた袋又は連続気孔プラスチックフォ
ームに接着しておいても良く，真空排気直前に成形体と
同時に外殻体（16）に挿入しても構わない。As a method of inserting the leak detection body (18), paper (for example, kraft paper) containing a molded body of inorganic fine powder in advance,
Alternatively, it may be adhered to a bag made of non-woven fabric or a continuous pore plastic foam, and may be inserted into the outer shell (16) at the same time as the molded body immediately before evacuation.
また軟質プラスチックフォーム又は繊維状断熱材のサイ
ズは特に制限は無いが，成形体と比較して小さめの方が
良く,20mm〜100mmの角型，又は円柱状が良い。The size of the flexible plastic foam or the fibrous heat insulating material is not particularly limited, but it is better to be smaller than the molded body, and a rectangular shape of 20 mm to 100 mm or a cylindrical shape is preferable.
クラフト紙の袋にシリカ粉末（平均二次凝集粒子径10μ
m,単粒子径50nm）を充填した後，予備成形を行ったのち
乾燥し，その表面に軟質ポリウレタンフォーム（20mm
φ,15mm,密度20kg/m3）を両面テープで張りつけ，アル
ミ蒸着ラミネートフィルム（アルミ蒸着ポリエステルフ
ィルム／アルミ蒸着ポリエステルフィルム／ポリエチレ
ンフィルム）に収容し内部を真空排気し，アルミ蒸着ラ
ミネートフイルムの開口部を熱融着する。真空断熱材の
外観を観察した所，軟質ポリウレタンフォームは外部か
らの大気圧によって圧縮され，平滑性を有していた。Silica powder in kraft paper bag (average secondary agglomerated particle size 10μ
m, single particle size 50 nm), then pre-molded and dried, and the surface of the flexible polyurethane foam (20 mm
φ, 15 mm, density 20 kg / m 3 ) is attached with double-sided tape, housed in an aluminum vapor deposition laminate film (aluminum vapor deposition polyester film / aluminum vapor deposition polyester film / polyethylene film), the interior is evacuated, and the aluminum vapor deposition laminate film opening Heat fusion. When the appearance of the vacuum heat insulating material was observed, the flexible polyurethane foam was compressed by the atmospheric pressure from the outside and had smoothness.
この構造体を熱伝導率測定装置により熱伝導率の測定を
行った所,0.0045kcal/mhr℃という結果を得た。The thermal conductivity of this structure was measured by a thermal conductivity measuring device, and the result was 0.0045 kcal / mhr ° C.
更にこの構造体にピンホールを１個所開けたところ，約
５分間で軟質ポリウレタンが完全に膨張し目視で真空漏
れを充分に観察することができたこの状態を第２図に示
している。Further, when one pinhole was opened in this structure, the soft polyurethane was completely expanded in about 5 minutes and the vacuum leak could be sufficiently observed by visual observation. This state is shown in FIG.
［発明の効果］ 以上のように本発明の効果を述べれば以下の通りであ
る。[Effects of the Invention] The effects of the present invention as described above are as follows.
（ａ）従来の真空断熱材のリーク検知は，真空断熱材自
体で確認は不可能であったため特別な真空度測定装置が
必要であったが，本発明によって真空断熱材自体で確認
可能となった。(A) Conventional leak detection of a vacuum heat insulating material requires a special vacuum degree measuring device because it cannot be confirmed by the vacuum heat insulating material itself, but according to the present invention, it can be confirmed by the vacuum heat insulating material itself. It was
（ｂ）従来真空断熱材を使用した製品で性能検査を行わ
ないと真空断熱材の不良品を確認できなかったが，本発
明により製造工程の途中で判断可能となり，製品のロス
を大幅に少なくすることができた。(B) Conventionally, a product using a vacuum heat insulating material could not be confirmed as a defective vacuum heat insulating material without a performance inspection, but the present invention makes it possible to make a judgment during the manufacturing process, greatly reducing product loss. We were able to.
（ｃ）今まで真空断熱材の表裏まで目視で傷の有無の確
認をしながら使用していたためかなりの時間のロスであ
ったが，本発明の真空断熱自体でリークが確認でき，し
かも全数をチェックできるようになり，大幅の時間の短
縮を計ることが可能となった。(C) It has been a considerable loss of time because the vacuum insulation was used up to the front and back while visually checking for scratches. However, the vacuum insulation of the present invention itself confirmed leaks, and the total number was Now that you can check it, you can save a lot of time.
第１図は本発明の一実施例による真空断熱材をを示す断
面図，第２図はリーク検出体が膨張した状態を示す断面
図，第３図は従来の真空断熱材を示す断面図，第４図は
従来の真空パック式断熱材の真空度測定装置を示す構成
図である。 図において，（16）は外殻体，（17）は充填材，（18）
はリーク検出体である。 なお，各図中，同一符号は同一，又は相当部分を示す。FIG. 1 is a sectional view showing a vacuum heat insulating material according to an embodiment of the present invention, FIG. 2 is a sectional view showing an expanded state of a leak detecting body, and FIG. 3 is a sectional view showing a conventional vacuum heat insulating material. FIG. 4 is a block diagram showing a conventional vacuum pack type heat insulating material vacuum degree measuring device. In the figure, (16) is the outer shell, (17) is the filler, (18)
Is a leak detector. In each figure, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 下野 和昭 静岡県引佐郡細江町中川2020 明星工業株 式会社中央研究所内 (72)発明者 河本 隆雄 静岡県静岡市小鹿３丁目18番１号 三菱電 機株式会社静岡製作所内 (72)発明者 池ケ谷 満 静岡県静岡市小鹿３丁目18番１号 三菱電 機株式会社静岡製作所内 (72)発明者 足達 威則 静岡県静岡市小鹿３丁目18番１号 三菱電 機株式会社静岡製作所内 (56)参考文献 特開 昭58−149496（ＪＰ，Ａ) 特開 昭61−241594（ＪＰ，Ａ) 実開 昭62−141187（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuaki Shimono Inventor Kazuaki Shimono 2020 Nakagawa, Hosoe-cho, Inasa-gun, Shizuoka Central Research Institute of Meisei Industry Co., Ltd. Electric Machinery Co., Ltd. Shizuoka Works (72) Inventor Mitsuru Ikegaya 3-18-1 Oshika, Shizuoka City, Shizuoka Prefecture Mitsubishi Electric Corporation Shizuoka Works (72) Inventor Takenori Adachi 3-18 Oga, Shizuoka City, Shizuoka Prefecture No. 1 Mitsubishi Electric Co., Ltd. Shizuoka Plant (56) Reference JP-A-58-149496 (JP, A) JP-A-61-241594 (JP, A) Practical application Sho-62-141187 (JP, U)
Claims (1)
ミ蒸着プラスチックフィルムを積層したプラスチックラ
ミネートフィルムからなる外殻袋と， この外殻袋に収納され，真空状態でガスを発生しにくい
充填材と， 前記外殻袋と充填材の間に設けられ，反発弾性力の大き
いリーク検出体と， を備え，前記外殻袋は内部を真空排気した後，開口部を
密封したことを特徴とする真空断熱材。1. An outer shell bag made of a plastic laminate film obtained by laminating an aluminum foil and a plastic film or an aluminum vapor-deposited plastic film, a filler which is housed in the outer shell bag and which hardly generates gas in a vacuum state, A vacuum heat insulating material, comprising: a leak detector provided between the shell bag and the filling material, which has a large repulsive elasticity, and the inside of the outer shell bag is evacuated and then the opening is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28019390A JPH0794951B2 (en) | 1990-10-18 | 1990-10-18 | Vacuum insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28019390A JPH0794951B2 (en) | 1990-10-18 | 1990-10-18 | Vacuum insulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04155173A JPH04155173A (en) | 1992-05-28 |
| JPH0794951B2 true JPH0794951B2 (en) | 1995-10-11 |
Family
ID=17621600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28019390A Expired - Fee Related JPH0794951B2 (en) | 1990-10-18 | 1990-10-18 | Vacuum insulation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794951B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002131257A (en) | 2000-10-26 | 2002-05-09 | Nisshinbo Ind Inc | Method and apparatus for measuring thermal conductivity, and method for fabricating heat insulating material |
| US7357498B2 (en) * | 2003-12-24 | 2008-04-15 | Seiko Epson Corporation | Method of filling liquid into liquid containing member, liquid filling apparatus and method of inspecting liquid containing member |
| JP4576196B2 (en) * | 2004-10-12 | 2010-11-04 | 日立アプライアンス株式会社 | refrigerator |
| WO2015197787A1 (en) * | 2014-06-25 | 2015-12-30 | Cryovac, Inc. | Leak detection system |
-
1990
- 1990-10-18 JP JP28019390A patent/JPH0794951B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04155173A (en) | 1992-05-28 |
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