JPH0816579B2 - Insulation wall - Google Patents
Insulation wallInfo
- Publication number
- JPH0816579B2 JPH0816579B2 JP62186255A JP18625587A JPH0816579B2 JP H0816579 B2 JPH0816579 B2 JP H0816579B2 JP 62186255 A JP62186255 A JP 62186255A JP 18625587 A JP18625587 A JP 18625587A JP H0816579 B2 JPH0816579 B2 JP H0816579B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon dioxide
- heat insulating
- urethane foam
- dioxide gas
- foam
- 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
- 238000009413 insulation Methods 0.000 title claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 58
- 239000006260 foam Substances 0.000 claims description 35
- 239000001569 carbon dioxide Substances 0.000 claims description 29
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 29
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000003463 adsorbent Substances 0.000 claims description 12
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 4
- 150000004692 metal hydroxides Chemical class 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000002994 raw material Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002808 molecular sieve Substances 0.000 description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 5
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 4
- 241000533293 Sesbania emerus Species 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000005187 foaming Methods 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
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003230 hygroscopic agent Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000002390 adhesive tape 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
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 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
- 239000000843 powder Substances 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，発泡剤に外し、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 the production of rigid urethane foam, which is a typical foam insulation material, various improvements have been made from the raw material side by removing 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 order to reduce the thermal conductivity of rigid urethane foam especially in such efforts,
It is important to improve the gas thermal conductivity of the gas component in the bubbles, and especially it is essential to use trichlorofluoromethane (hereinafter referred to as R-11) as a blowing agent and fill the foam bubbles with R-11 gas. Met.
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、原料系中に含ま
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を避けることができ
なかった。Ｒ−11のガス熱伝導率が、0.0067kcal/mhr℃
であるのに対し、炭酸ガスのガス熱伝導率は0.0125kcal
/mhr℃と大きく、気体熱伝導率を改善し、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。However, avoid the phenomenon that the moisture contained in the raw material system reacts with the isocyanate due to residual moisture in the urethane foam raw material or moisture absorption at the time of injection into the heat insulation wall, and the generated carbon dioxide gas is contained in the foam bubbles. I couldn't. The gas thermal conductivity of R-11 is 0.0067kcal / mhr ℃
On the other hand, the gas thermal conductivity of carbon dioxide is 0.0125 kcal
The presence of carbon dioxide gas was a major problem in improving the thermal conductivity of the foam and the thermal conductivity of the foam.
従来、系中から発生する炭酸ガスの除去に対しては例
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, for example, a method disclosed in Japanese Utility Model Publication No. Sho 53-36297 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.
発明が解決しようとする問題点 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。第４図で説明すると、１は断熱壁で鉄板
からなる外板２とプラスチック製の内板３及び外板２と
内板３間に一体発泡してなる硬質ウレタンフォーム４か
ら構成されている。５は通気性を有する袋６に充填した
モレキュラシーブス（東洋曹達製9F）で、あらかじめ、
外板２と内板３間に配設し、一体発泡したものである。Problems to be Solved by the Invention However, for coffee beans having 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. However, in the case of a hard urethane foam, even if a carbon dioxide gas adsorbent is embedded, since the bubbles are closed cells, the movement of carbon dioxide gas is slow and there is a problem that the carbon dioxide gas cannot be adsorbed during the period from the production to the actual use. Referring to FIG. 4, reference numeral 1 denotes a heat insulating wall which is composed of an outer plate 2 made of an iron plate, a plastic inner plate 3, and a rigid urethane foam 4 integrally foamed between the outer plate 2 and the inner plate 3. 5 is molecular sieves (9F made by Toyo Soda) filled in a breathable bag 6,
It is disposed between the outer plate 2 and the inner plate 3 and integrally foamed.
このような構成においては、気泡中に含まれる炭酸ガ
スは、独立気泡体である硬質ウレタンフォーム４の気泡
膜に阻害されて、拡散速度が遅くまた吸着面積が非常に
狭く、容易にモレキュラシーブス５に到達しないという
現象があった。In such a structure, the carbon dioxide gas contained in the bubbles is hindered by the bubble film of the rigid urethane foam 4, which is a closed cell, so that the diffusion rate is slow and the adsorption area is very narrow, so that the molecular sieves 5 are easily formed. There was a phenomenon of not reaching.
このため断熱壁１の製造から実使用までの期間におい
て炭酸ガスの吸着が完全に行えないため硬質ウレタンフ
ォーム４の熱伝導率が十分に改善できなかった。さら
に、モレキュラシーブス５の配設された部分の断熱性能
は極めて悪く、断熱壁１の断熱性能が向上できなかっ
た。For this reason, since the carbon dioxide gas cannot be completely adsorbed during the period from the production of the heat insulating wall 1 to the actual use, the thermal conductivity of the rigid urethane foam 4 cannot be sufficiently improved. Further, the heat insulating performance of the portion where the molecular sieves 5 are arranged is extremely poor, and the heat insulating performance of the heat insulating wall 1 cannot be improved.
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、金属水酸化
物からなる炭酸ガス吸着剤及び無水金属塩等からなる吸
湿剤を含浸させた通気性シートを内板と外板の間に配設
し、硬質ウレタンフォームにより一体発泡してなる断熱
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 provides an inner plate having a breathable sheet impregnated with a carbon dioxide adsorbent composed of a metal hydroxide and a moisture absorbent composed of an anhydrous metal salt or the like. And a heat insulating wall formed by integrally foaming with rigid urethane foam.
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通気性シート
に含浸させた炭酸ガス吸着剤に容易に吸着される。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
いため、短時間で移動が可能である。また、通気性シー
トを用いることによって断熱性能への影響は小さく吸着
面積も広くなり吸着能力は極めて向上する。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ものである。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 and is easily adsorbed by the carbon dioxide adsorbent impregnated in the breathable sheet. In this case, the rate of movement of the carbon dioxide gas is determined by the passage of the heat insulating wall portion of the rigid urethane foam, but the movement distance is short in the wall thickness direction, so that it can be moved in a short time. In addition, the use of the breathable sheet has a small influence on the heat insulation performance, and the adsorption area is widened, so that the adsorption ability is significantly improved. 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、通気性シートに含浸させた吸湿剤により
速やかに吸着され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
Water vapor is generated at the same time as carbon dioxide gas is adsorbed, but the generated water vapor is quickly adsorbed by the hygroscopic agent impregnated in the breathable sheet and does not enter the foam, resulting in deterioration of foam thermal conductivity due to water vapor. There is no feature.
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。なお、従来と同一構成のものにつ
いては、同一番号を符して説明を省略する。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. It should be noted that the same components as those of the related art are denoted by the same reference numerals and the description thereof will be omitted.
７は、炭酸ガス吸着剤として水酸化カルシウム及び吸
湿剤として無水塩化カルシウムを含浸させた不織紙から
なる通気性シートである。前記通気性シート７を内板３
の裏面に接着テープ等で固定し、前記内板３と外板２間
を硬質ウレタンフォーム４にて一体発泡して断熱壁１を
形成している。Reference numeral 7 is a breathable sheet made of non-woven paper impregnated with calcium hydroxide as a carbon dioxide adsorbent and anhydrous calcium chloride as a moisture absorbent. The breathable sheet 7 is used as the inner plate 3
The inner wall 3 and the outer plate 2 are integrally foamed with a hard urethane foam 4 to form the heat insulating wall 1 by fixing the inner wall 3 and the outer plate 2 to each other with an adhesive tape or the like.
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/mhr℃から0.0122kcal/mhr℃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）
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 / mhr ° C to 0.0122 kcal / mhr ° C in the one obtained by disassembling the obtained heat insulation wall 1 immediately after foaming and the one disassembled after 4 weeks. It was found that the insulation performance of wall 1 was improved by about 10%. The thermal conductivity is based on Vacuum Riko Co., Ltd.
It measured using K-MATIC at the average temperature of 24 degreeC.
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
中の残留水分や一体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硬
質ウレタンフォーム４に残留することなく通気性シート
７に含浸させた水酸化カルシウムに吸着されたことを示
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、断熱壁の厚さ方向に拡散移動し
て、吸着面積が極めて広い通気性シート７に含浸させた
吸着剤に到達するため、その吸着速度は速い。特に吸着
速度が律速となる独立気泡体である硬質ウレタンフォー
ム４層の拡散移動が距離的に短かいので短時間で移動で
き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 the carbon dioxide gas generated by the residual water in the raw material of the rigid urethane foam or the moisture due to the absorption of moisture at the time of integral foaming reacts with the isocyanate as the curing agent and is not impregnated in the rigid urethane foam 4 and is impregnated in the breathable sheet 7. It shows that it was adsorbed to the calcium hydroxide. During the adsorption process, the carbon dioxide gas in the rigid urethane foam 4 diffuses and moves in the thickness direction of the heat insulating wall to reach the adsorbent impregnated in the breathable sheet 7 having an extremely large adsorption area. The speed is fast. In particular, the diffusion movement of the rigid urethane foam 4 layer, which is a closed-cell body whose adsorption rate is rate-determining, is short in distance, so that it can be moved in a short time and can be removed.
さらに、炭酸ガス吸着剤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、直ちに同じ通気性シート７に含浸さ
せた無水塩化カルシウムに吸着される。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 as the carbon dioxide gas adsorbent effectively adsorbs carbon dioxide gas, while the water vapor generated at the same time is immediately adsorbed by the anhydrous calcium chloride impregnated in the same breathable sheet 7. Therefore, there is no problem of penetrating into the foam and conversely lowering the thermal conductivity.
なお、実施例において通気性シート７の基材として不
織紙を用いているが、プラスチック製あるいは布製の通
気性を有するシートに吸着剤を含浸させたものも可能で
ある。In addition, although non-woven paper is used as the base material of the breathable sheet 7 in the examples, it is also possible to use a breathable sheet made of plastic or cloth impregnated with an adsorbent.
発明の効果 以上の様に、金属酸化物からなる炭酸ガス吸着剤を含
浸させた通気性シートを、内板と外板の間に配設し、硬
質ウレタンフォームにより、一体発泡してなる断熱壁を
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
る水蒸気は同じ通気性シートに含浸させた無水金属塩等
からなる吸湿剤に吸着されるため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, a breathable sheet impregnated with a carbon dioxide adsorbent made of a metal oxide is arranged between an inner plate and an outer plate, and a rigid urethane foam forms a heat insulating wall integrally foamed. Therefore, carbon dioxide gas remaining in the rigid urethane foam can be easily adsorbed and removed. Further, when the metal hydroxide adsorbs carbon dioxide, the water vapor generated by the reaction is adsorbed by the hygroscopic agent consisting of anhydrous metal salt impregnated in the same breathable sheet, so that it penetrates into the foam and the thermal conductivity increases. There is no problem that deteriorates. 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図は本発明の一実施例の断熱壁の外観斜視図、第２
図は同断熱壁の断面図、第３図は第２図の拡大断面図、
第４図は従来例の断熱壁の断面図である。 １……断熱壁、２……外板、３……内板、４……硬質ウ
レタンフォーム、７……通気性シート。FIG. 1 is an external perspective view of a heat insulating wall according to an embodiment of the present invention, FIG.
The figure is a sectional view of the heat insulating wall, FIG. 3 is the enlarged sectional view of FIG. 2,
FIG. 4 is a sectional view of a conventional heat insulating wall. 1 ... Insulation wall, 2 ... Outer plate, 3 ... Inner plate, 4 ... Hard urethane foam, 7 ... Breathable sheet.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−3739（ＪＰ，Ａ) 特開 昭61−191869（ＪＰ，Ａ) 実開 昭57−182091（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 61-3739 (JP, A) JP 61-191869 (JP, A) JP 57-182091 (JP, U)
Claims (1)
無水金属塩等からなる吸湿剤を含浸させた通気性シート
を、内板と、外板の間に配設し、硬質ウレタンフォーム
を発泡してなる断熱壁。1. A breathable sheet impregnated with a carbon dioxide adsorbent composed of a metal hydroxide and a moisture absorbent composed of an anhydrous metal salt or the like is disposed between an inner plate and an outer plate to foam a rigid urethane foam. Insulation wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62186255A JPH0816579B2 (en) | 1987-07-24 | 1987-07-24 | Insulation wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62186255A JPH0816579B2 (en) | 1987-07-24 | 1987-07-24 | Insulation wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6428475A JPS6428475A (en) | 1989-01-31 |
| JPH0816579B2 true JPH0816579B2 (en) | 1996-02-21 |
Family
ID=16185071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62186255A Expired - Fee Related JPH0816579B2 (en) | 1987-07-24 | 1987-07-24 | Insulation wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0816579B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57182091U (en) * | 1981-05-15 | 1982-11-18 |
-
1987
- 1987-07-24 JP JP62186255A patent/JPH0816579B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6428475A (en) | 1989-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |