JPH0820174B2 - Insulation wall - Google Patents
Insulation wallInfo
- Publication number
- JPH0820174B2 JPH0820174B2 JP16004587A JP16004587A JPH0820174B2 JP H0820174 B2 JPH0820174 B2 JP H0820174B2 JP 16004587 A JP16004587 A JP 16004587A JP 16004587 A JP16004587 A JP 16004587A JP H0820174 B2 JPH0820174 B2 JP H0820174B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon dioxide
- heat insulating
- urethane foam
- gas
- thermal conductivity
- 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 - Lifetime
Links
- 238000009413 insulation Methods 0.000 title description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 64
- 239000001569 carbon dioxide Substances 0.000 claims description 32
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 32
- 239000006260 foam Substances 0.000 claims description 29
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000003463 adsorbent Substances 0.000 claims description 16
- 239000011810 insulating material Substances 0.000 claims description 5
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 5
- 150000004692 metal hydroxides Chemical class 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 241000533293 Sesbania emerus Species 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
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、冷蔵庫・冷凍庫等に用いる断熱壁に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating wall used in refrigerators, freezers and the like.
従来の技術 近年、省エネルギーの観点より発泡断熱材の熱伝導率
を低減し、断熱性を向上させることが強く望まれてい
る。このため代表的な発泡断熱材である硬質ウレタンフ
ォームの製造にあたっては、主原料として用いるポリエ
ーテルポリオール及びイソシアネート、助剤原料として
用いる整泡剤，触媒，発泡剤に対し、原料面から種々の
改善取組みがなされている。このような取組みにおい
て、特に硬質ウレタンフォームの熱伝導率を低減するに
は、気泡中のガス成分の気体熱伝導率を改善することが
重要であり、特に発泡剤としてトリクロロフルオロメタ
ン（以下Ｒ−11と称す）を用い、Ｒ−11ガスでフォーム
気泡中を満たすことが不可欠であった。2. Description of the Related Art In recent years, from the viewpoint of energy saving, it has been strongly desired to reduce the thermal conductivity of the foamed heat insulating material and improve the heat insulating property. Therefore, in manufacturing rigid urethane foam, which is a typical foam insulation material, various improvements have been made from the raw material side with respect to the polyether polyol and isocyanate used as the main raw materials, the foam stabilizer, the catalyst, and the foaming agent used as the auxiliary raw materials. Efforts are being made. In such an approach, it is important to improve the gas thermal conductivity of the gas component in the bubbles in order to reduce the thermal conductivity of the rigid urethane foam in particular, and trichlorofluoromethane (hereinafter referred to as R- It was essential to fill the foam cells with R-11 gas.
発明が解決しようとする問題点 しかしながら、ウレタンフォーム原料中の残留水分や
断熱壁に注入する時点での吸湿により、原料糸中に含ま
れる水分がイソシアネートと反応し、発生した炭酸ガス
がフォーム気泡中に含まれる現象が避けれなかった。Ｒ
−11のガス熱伝導率が、0.0067kcal/mh℃であるのに対
し、炭酸ガスのガス熱伝導率は、0.0125kcal/mh℃と大
きく、気体伝導率を改善し、フォームの熱伝導率を向上
していく上で炭酸ガスの存在が大きな問題であった。Problems to be Solved by the Invention However, due to residual moisture in the urethane foam raw material or moisture absorption at the time of injecting into the heat insulation wall, the moisture contained in the raw material yarn reacts with the isocyanate, and the generated carbon dioxide gas is generated in the foam bubbles. The phenomenon included in was inevitable. R
The gas thermal conductivity of -11 is 0.0067 kcal / mh ° C, whereas the gas thermal conductivity of carbon dioxide is as large as 0.0125 kcal / mh ° C, which improves the gas conductivity and improves the thermal conductivity of the foam. The existence of carbon dioxide was a major problem in improving the quality.
従来、系中から発生する炭酸ガスの除去に対しては、
断熱材に関するものでないが例えば、実公昭53−36297
号公報に示されるような方法が提案されている。この実
公昭53−36297号公報を説明すると密閉容器中に充填し
たコーヒー豆から発生する炭酸ガスを密閉容器中に同封
したモレキュラシーブスにより吸着させ、除去すること
が特徴となっている。Conventionally, for the removal of carbon dioxide gas generated from the system,
Although it is not related to heat insulating materials, for example, Jikho Sho 53-36297
A method as shown in Japanese Patent Publication has been proposed. This Japanese Utility Model Publication No. 53-36297 is characterized in that carbon dioxide gas generated from coffee beans filled in a closed container is adsorbed and removed by molecular sieves enclosed in the closed container.
しかし、コーヒー豆のように充填空間のあるものにつ
いては、発生した炭酸ガスが空隙を移動して炭酸ガス吸
着剤であるモレキュラシーブスに吸着されるため問題は
ないが、硬質ウレタンフォームでは、炭酸ガス吸着剤を
埋設しても気泡が独立気泡であるため炭酸ガスの移動は
遅く、製造時から実使用までの期間で吸着できないとい
う問題があった。However, for coffee beans that have a filling space, such as coffee beans, there is no problem because the generated carbon dioxide gas moves through the voids and is adsorbed by the molecular sieves, which are carbon dioxide gas adsorbents. Even if the adsorbent was buried, the bubbles were independent bubbles, so the movement of carbon dioxide gas was slow, and there was a problem that the carbon dioxide gas could not be adsorbed during the period from the production to the actual use.
本発明は、上記問題点に鑑み、短時間で硬質ウレタン
フォーム中に含まれる炭酸ガスを吸着除去し、硬質ウレ
タンフォームの熱伝導率を改善し、断熱壁の断熱性能を
改善することを目的とする。In view of the above problems, the present invention aims at adsorbing and removing carbon dioxide gas contained in a rigid urethane foam in a short time, improving the thermal conductivity of the rigid urethane foam, and improving the heat insulating performance of a heat insulating wall. To do.
問題点を解決するための手段 本発明は、上記問題点を解決するために、少なくとも
一方に通気孔を有する外板と、この両板間に充填された
硬質ウレタンフォームからなる断熱材とよりなり、前記
両板の相対向する面側を覆った気体透過性フィルムと、
このフィルムと通気孔が位置する板の間に配設された金
属水酸化物からなる炭酸ガス吸着剤とから断熱壁を形成
するものである。Means for Solving the Problems In order to solve the above problems, the present invention comprises an outer plate having a ventilation hole in at least one of them, and a heat insulating material made of a rigid urethane foam filled between the both plates. A gas permeable film covering opposite sides of the plates,
A heat insulating wall is formed from this film and a carbon dioxide adsorbent made of a metal hydroxide, which is disposed between the plate in which the ventilation holes are located.
作用 上記構成によって硬質ウレタンフォーム中に含まれる
炭酸ガスは、断熱壁の厚み方向に移動してフィルムを通
過、さらにフィルムと箱との空間を移動し、容易に吸着
剤に吸着される。この場合、炭酸ガスの移動速度の律速
は、硬質ウレタンフォームの断熱壁部の通過にあるが、
壁厚方向は移動距離が短かいため、短時間で移動が可能
である。よって、硬質ウレタンフォーム中に存在する炭
酸ガスは、容易に吸着剤によって除去できるのである。Action With the above structure, the carbon dioxide gas contained in the rigid urethane foam moves in the thickness direction of the heat insulating wall, passes through the film, further moves in the space between the film and the box, and is easily adsorbed by the adsorbent. In this case, the rate of movement of carbon dioxide lies in the passage through the heat insulating wall of the rigid urethane foam,
Since the moving distance is short in the wall thickness direction, it is possible to move in a short time. Therefore, carbon dioxide gas existing in the rigid urethane foam can be easily removed by the adsorbent.
また、炭酸ガス吸着剤として用いる金属水酸化物は、
炭酸ガスを吸着すると同時に水蒸気を発生するが、発生
した水蒸気は、通気孔を通じて揮散するためフォーム中
に侵入することがなく、水蒸気によるフォーム熱伝導率
の劣化がない特徴を有している。Further, the metal hydroxide used as the carbon dioxide gas adsorbent is
Although water vapor is generated at the same time as carbon dioxide is adsorbed, the generated water vapor is volatilized through the vent holes so that it does not enter the foam and the steam has a characteristic that the thermal conductivity of the foam is not deteriorated.
実施例 以下、実施例を挙げて本発明の断熱壁を第１図〜第３
図を用いて説明する。Examples Hereinafter, the heat insulating wall of the present invention will be described with reference to Examples with reference to FIGS.
This will be described with reference to the drawings.
１は断熱壁で、外板２と内板３、及び両板2,3間に充
填した硬質ウレタンフォーム４から成っている。５は炭
酸ガス吸着剤で水酸化カルシウム粉末を用い、通気性を
有する不織布袋６にあらかじめ充填したものを使用して
いる。７は気体透過性のフィルムで、ポリエチレンフィ
ルム（厚み50μｍ）を用いた。断熱壁１の製造にあたっ
ては、まず通気孔８を有する内板３の棚成型部９に炭酸
ガス吸着剤５をテープ等で固定し、さらに内板３と炭酸
ガス吸着剤５を覆うように気体透過性のフィルム７を内
板３に両面テープ等でスポット的に貼り、この後硬質ウ
レタンフォーム４を気体透過性のフィルム７と外板２間
に注入充填し、断熱壁１を形成している。Reference numeral 1 is a heat insulating wall, which is composed of an outer plate 2, an inner plate 3, and a hard urethane foam 4 filled between the plates 2 and 3. Reference numeral 5 denotes a carbon dioxide gas adsorbent, which is made of calcium hydroxide powder, and which is previously filled in a breathable nonwoven fabric bag 6. 7 is a gas permeable film, and a polyethylene film (thickness 50 μm) was used. In the manufacture of the heat insulating wall 1, first, the carbon dioxide adsorbent 5 is fixed to the shelf molding portion 9 of the inner plate 3 having the vent holes 8 with tape or the like, and further gas is applied so as to cover the inner plate 3 and the carbon dioxide adsorbent 5. The permeable film 7 is spot-attached to the inner plate 3 with double-sided tape or the like, and then the rigid urethane foam 4 is injected and filled between the gas permeable film 7 and the outer plate 2 to form the heat insulating wall 1. .
得られた断熱壁１を発泡直後に解体したものと、４週
間後に解体したものでは、硬質ウレタンフォーム４の熱
伝導率は、0.0134kcal/mh℃から0.0124kcal/mh℃まで低
減しており、断熱壁１として約10％断熱性能が向上して
いることが判った。なお、熱伝導率は、真空理工（株）
製Ｋ−MATICを用い、平均温度24℃で測定した。The thermal conductivity of the rigid urethane foam 4 decreased from 0.0134 kcal / mh ° C to 0.0124 kcal / mh ° C in the one obtained by disassembling the obtained heat insulating wall 1 immediately after foaming and the one disassembled after 4 weeks. It was found that the heat insulation performance of the heat insulation wall 1 was improved by about 10%. The thermal conductivity is based on Vacuum Riko Co., Ltd.
It was measured at an average temperature of 24 ° C. using K-MATIC manufactured by K. Co., Ltd.
このように、本発明の断熱壁１は、優れた断熱性能を
示すことが判った。これは硬質ウレタンフォーム原料中
の残留水や充填発泡時の吸湿等による水分が硬化剤であ
るイソシアネートと反応して発生した炭酸ガスが４週間
を経過して硬質ウレタンフォーム４に残留することな
く、炭酸ガス吸着剤５に吸着され除去されたことを示し
ている。吸着の過程においては、硬質ウレタンフォーム
４中の炭酸ガスは、炭酸ガス吸着剤５に向かって拡散移
動するが、特に断熱壁１の厚み方向に拡散移動して気体
透過性のフィルム７を透過し、フィルム７と内板３間の
空間を移動して炭酸ガス吸着剤５に到達できるため、吸
着速度が速いという特徴を有する。つまり、吸着速度が
律速となる独立気泡体の硬質ウレタンフォーム４層の炭
酸ガスが全ての部分で、厚み方向に拡散移動できるた
め、短時間で拡散移動でき吸着除去が可能となるのであ
る。Thus, it was found that the heat insulating wall 1 of the present invention exhibits excellent heat insulating performance. This is because carbon dioxide generated by residual water in the rigid urethane foam raw material or moisture due to moisture absorption at the time of filling and foaming reacts with isocyanate as a curing agent and does not remain in the rigid urethane foam 4 after 4 weeks, This indicates that the carbon dioxide gas adsorbent 5 has been adsorbed and removed. During the adsorption process, carbon dioxide in the rigid urethane foam 4 diffuses and moves toward the carbon dioxide adsorbent 5, but particularly diffuses and moves in the thickness direction of the heat insulating wall 1 and permeates the gas-permeable film 7. Since the carbon dioxide gas adsorbent 5 can be moved by moving in the space between the film 7 and the inner plate 3, the adsorption speed is high. That is, the carbon dioxide gas of the hard urethane foam 4 layer of the closed-cell body, whose adsorption rate is rate-determining, can be diffused and moved in the thickness direction in all the portions, and thus can be diffused and moved in a short time and can be adsorbed and removed.
さらに、炭酸ガス吸着剤５に使用した水酸化カルシウ
ム粉末は炭酸ガスを効果的に吸着する一方、吸着と同時
に発生した水蒸気は、直ちに通気孔８を介して外気に揮
散する。このため、フォーム中に侵入し、逆に熱伝導率
を低下させるという問題はない。Further, the calcium hydroxide powder used for the carbon dioxide gas adsorbent 5 effectively adsorbs carbon dioxide gas, while the water vapor generated simultaneously with the adsorption immediately volatilizes to the outside air through the ventilation holes 8. Therefore, there is no problem of penetrating into the foam and conversely lowering the thermal conductivity.
なお本実施例においては、気体透過性のフィルム７と
してポリエチレンフィルムを用いたが、薄紙や布でも効
果は同じであり使用可能である。In this embodiment, a polyethylene film is used as the gas permeable film 7, but thin paper or cloth can also be used with the same effect.
発明の効果 以上のように少なくとも一方に貫通孔を有する外板と
内板と、この両板間に充填された硬質ウレタンフォーム
からなる断熱材とよりなり、前記両板の相対向する面側
を覆った気体透過性のフィルムとこのフィルムと貫通孔
が位置する板の間に配設された金属水酸化物からなる炭
酸ガス吸着剤とから断熱壁を形成しているため硬質ウレ
タンフォーム中に発生残留した炭酸ガスは、容易に吸着
除去が可能である。又、金属水酸化物が炭酸ガスを吸着
した際、反応によって発生する水蒸気は通気孔より外気
に揮散しフォーム中に侵入して熱伝導率を劣化させる問
題はない。この結果、気泡中の気体熱伝導率が低減し、
硬質ウレタンフォームの熱伝導率が改善され、優れた断
熱性能を有する断熱壁が提供できるのである。EFFECTS OF THE INVENTION As described above, the outer plate and the inner plate having the through holes on at least one side, and the heat insulating material made of the hard urethane foam filled between the both plates are provided, and the opposite surface sides of the both plates are Residue generated in the rigid urethane foam because the heat insulating wall was formed from the covered gas permeable film and the carbon dioxide adsorbent made of metal hydroxide disposed between this film and the plate in which the through hole was located. Carbon dioxide can be easily removed by adsorption. Further, when the metal hydroxide adsorbs carbon dioxide gas, there is no problem that water vapor generated by the reaction volatilizes to the outside through the vent holes and enters the foam to deteriorate the thermal conductivity. As a result, the gas thermal conductivity in the bubbles is reduced,
The thermal conductivity of the rigid urethane foam is improved, and a heat insulating wall having excellent heat insulating performance can be provided.
第１図は本発明の実施例の断熱箱体の外観斜視図、第２
図は同断熱箱体の断面図、第３図は第２図の拡大断面図
である。 １……断熱壁、２……外板、３……内板、４……硬質ウ
レタンフォーム、５……炭酸ガス吸着剤、７……フィル
ム、８……通気孔。FIG. 1 is an external perspective view of an insulation box body according to an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view of the same heat insulating box, and FIG. 3 is an enlarged sectional view of FIG. 1 ... Insulation wall, 2 ... Outer plate, 3 ... Inner plate, 4 ... Hard urethane foam, 5 ... Carbon dioxide adsorbent, 7 ... Film, 8 ... Vent hole.
Claims (1)
は内板と、この両板間に充填された硬質ウレタンフォー
ムからなる断熱材とよりなり、前記両板の相対向する面
側を覆った気体透過性のフィルムと、このフィルムと通
気孔が位置する板の間に配設された金属水酸化物からな
る炭酸ガス吸着剤とからなる断熱壁。1. An outer plate or an inner plate having ventilation holes on at least one side, and a heat insulating material made of a hard urethane foam filled between the both plates, and covering the opposite surface sides of the both plates. A heat insulating wall made of a gas permeable film and a carbon dioxide adsorbent made of a metal hydroxide disposed between the film and the plate in which the ventilation hole is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16004587A JPH0820174B2 (en) | 1987-06-26 | 1987-06-26 | Insulation wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16004587A JPH0820174B2 (en) | 1987-06-26 | 1987-06-26 | Insulation wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS646676A JPS646676A (en) | 1989-01-11 |
| JPH0820174B2 true JPH0820174B2 (en) | 1996-03-04 |
Family
ID=15706731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16004587A Expired - Lifetime JPH0820174B2 (en) | 1987-06-26 | 1987-06-26 | Insulation wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820174B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900330B (en) * | 2014-04-04 | 2016-10-05 | 合肥美的电冰箱有限公司 | Refrigerating plant |
-
1987
- 1987-06-26 JP JP16004587A patent/JPH0820174B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS646676A (en) | 1989-01-11 |
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