JP2558694B2 - Manufacturing method of heat insulation box - Google Patents
Manufacturing method of heat insulation boxInfo
- Publication number
- JP2558694B2 JP2558694B2 JP62120500A JP12050087A JP2558694B2 JP 2558694 B2 JP2558694 B2 JP 2558694B2 JP 62120500 A JP62120500 A JP 62120500A JP 12050087 A JP12050087 A JP 12050087A JP 2558694 B2 JP2558694 B2 JP 2558694B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- heat insulating
- air
- box
- insulating material
- 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
Landscapes
- Refrigerator Housings (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、冷蔵庫等に用いる断熱箱体の製造方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat insulating box used in a refrigerator or the like.
従来の技術 近年、冷蔵庫に用いられる断熱箱体は、省電力のため
の断熱性能の向上が求められ、断熱箱体に充填される発
泡性断熱材には、できる限り低い熱伝導率が要求されて
来ている。2. Description of the Related Art In recent years, heat insulation boxes used for refrigerators are required to have improved heat insulation performance for power saving, and the foamed heat insulating material filled in the heat insulation boxes is required to have the lowest possible thermal conductivity. Is coming.
以下、図面を参照しながら、上述した従来の断熱箱体
の製造方法の一例について説明する。Hereinafter, an example of the conventional method for manufacturing the above-described heat insulating box will be described with reference to the drawings.
第７図から第10図は、従来の断熱箱体を示すものであ
る。図において、１は鉄板等でできた外箱、２はプラス
チック製の内箱である。３は注入ヘッドであり外箱１に
設けられた注入口４を通じて、内外箱間の空間５にトリ
クロロフルオロメタン（Ｒ−11）等を発泡剤とする発泡
性断熱材６の原液７が注入される。注入された原液７
は、外箱１と内箱２の嵌合部分８に激しく衝突し、内外
箱間の空間５の空気９を巻き込みながら泡化する（第８
図の状態）。注入ヘッド３からの注入が終了すると前記
注入口４に注入ギャップ10が発泡断熱材６の漏れ防止の
ためにはめ込まれ、一方注入された前記原液７は、巻き
込んだ空気９を気泡（図示せず）の中に包含しながら、
体積膨張してゆく（第９図の状態）。体積膨張が完了
し、発泡性断熱材６が完全充填して、断熱箱体11ができ
る（第10図の状態）。7 to 10 show a conventional heat insulating box. In the figure, 1 is an outer box made of an iron plate or the like, and 2 is an inner box made of plastic. Reference numeral 3 denotes an injection head, and a stock solution 7 of a foamable heat insulating material 6 having a foaming agent such as trichlorofluoromethane (R-11) is injected into a space 5 between the inner and outer boxes through an injection port 4 provided in the outer box 1. It Stock solution injected 7
Violently collides with the fitting portion 8 of the outer box 1 and the inner box 2 and forms air while entraining the air 9 in the space 5 between the inner and outer boxes (eighth embodiment).
State in the figure). When the injection from the injection head 3 is completed, the injection gap 10 is fitted into the injection port 4 for preventing the leakage of the foamed heat insulating material 6, while the injected undiluted solution 7 bubbles the entrained air 9 into bubbles (not shown). )
The volume expands (state of FIG. 9). The volume expansion is completed, the foaming heat insulating material 6 is completely filled, and the heat insulating box 11 is formed (state of FIG. 10).
発明が解決しようとする問題点 しかしながら、上記の様にしてできた断熱箱体11では
発泡性断熱材６の気泡（図示せず）の中に（表−１）の
如く５〜10vol％の空気を含むため、発泡性断熱材６の
ガス熱伝導が空気の混入で大きくなり、空気が混入しな
い理想状態の場合と比較すると、発泡性断熱材６の熱伝
導率で、0.0008〜0.0016（kcal/mh℃）悪化していると
いう問題点を有していた。Problems to be Solved by the Invention However, in the heat insulating box 11 formed as described above, 5 to 10 vol% of air is contained in the bubbles (not shown) of the foamable heat insulating material 6 as shown in Table 1. Since the gas heat conduction of the foamable heat insulating material 6 becomes large due to the inclusion of air, the heat conductivity of the foamable heat insulating material 6 is 0.0008 to 0.0016 (kcal / It had a problem that it was getting worse.
これを防ぐ構成としては、注入ヘッド３からの原液７
の注入スピードをできる限り、ゆるやかにする等の方法
が採られていたが、発泡性断熱材６の気泡（図示せず）
中の空気９の量は、１〜２％しか低下せず、また大容量
の断熱箱体11においてはあまり注入スピードを遅くした
場合、泡化し体積膨張している発泡性断熱材６の上から
原液７を注入することになって、気泡（図示せず）の破
泡を生じ、ボイド（図示せず）による断熱性低下が起こ
るなど、弊害があった。To prevent this, the stock solution 7 from the injection head 3 is used.
Although the method of making the injection speed of the foam as slow as possible was adopted, bubbles of the foamable heat insulating material 6 (not shown)
The amount of the air 9 in the inside is reduced only by 1 to 2%, and when the injection speed is too slow in the large-capacity heat insulating box 11, from the top of the foamable heat insulating material 6 which is foamed and expanded in volume. Pouring the undiluted solution 7 causes a bubble (not shown) to be broken, and a void (not shown) causes a decrease in heat insulation.
本発明は、上記問題点に鑑み発泡性断熱材６の気泡
（図示せず）中への空気の混入をなくし、熱伝導率の悪
化を防止することを目的とするものである。 In view of the above problems, the present invention has an object to prevent air from being mixed into bubbles (not shown) of the expandable heat insulating material 6 and prevent deterioration of thermal conductivity.
問題点を解決するための手段 上記問題点を解決するために本発明は、発泡性断熱材
の原液を内外箱間の空間に注入する前に、内外箱間の空
間の空気を除去し、代わりに空気よりもガスの熱伝導率
が低くかつ比重の重い気体を充填し、その後発泡性断熱
材の原液を注入するという方法で製造するものである。Means for Solving the Problems In order to solve the above problems, the present invention removes air in the space between the inner and outer boxes before injecting the undiluted solution of the foamable insulating material into the space between the inner and outer boxes, and It is manufactured by a method in which a gas having a lower thermal conductivity of gas and a higher specific gravity than air is filled, and then a stock solution of a foamable heat insulating material is injected.
作用 本発明は、上記した構成によって、内外箱間の空間に
注入された原液が激しく衝突する時、空気の代わりに空
気より熱伝導率の低い気体を巻き込むので、発泡性断熱
材の気泡中に空気を含まず前記気体を５〜10vol％含
む。従って、前記気体が空気よりガスの熱伝導率の低い
分だけ、発泡性断熱材の熱伝導率も低くすることができ
る。Effect The present invention, by the above-mentioned configuration, when the stock solution injected into the space between the inner and outer boxes violently collides, a gas having a lower thermal conductivity than air is entrained in place of air, so that it is trapped in the bubbles of the foamable heat insulating material. It does not contain air and contains 5 to 10 vol% of the gas. Therefore, the thermal conductivity of the foamable heat insulating material can be reduced by the amount that the gas has a lower thermal conductivity than that of air.
実 施 例 以下本発明の一実施例の断熱箱体について図面を参照
しながら説明する。Example A heat insulating box according to an example of the present invention will be described below with reference to the drawings.
第１図から第６図は、本発明の一実施例における断熱
箱体を示すものである。1 to 6 show a heat insulating box in one embodiment of the present invention.
図において、従来例と同一構成については、同一番号
を符してその詳細な説明を省略する。In the figure, the same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.
外箱１の注入口４の一方に、空気よりガスの熱伝導率
が低くかつ比重の重い気体例えば二酸化炭素等の気体12
の供給管13が配設されている（第２図の状態）。この供
給管13は、ボンベ14に結ばれており、前記注入口４から
気体12を内外箱間の空間５に送り込む。気体12の比重は
空気９の約1.5倍あり、重いため下方へ滞留するので、
内外箱間の空間５の容積の約1.5〜２倍の容積の気体12
を送ってやれば、ほぼ内外箱間の空間５の中は気体12に
入れ替わる。A gas having a lower thermal conductivity of gas and a higher specific gravity than air, such as carbon dioxide, is provided in one of the inlets 4 of the outer box 12.
2 is provided (state of FIG. 2). The supply pipe 13 is connected to a cylinder 14 and sends the gas 12 from the inlet 4 into the space 5 between the inner and outer boxes. The specific gravity of the gas 12 is about 1.5 times that of the air 9, and since it is heavy, it stays downwards.
Gas of about 1.5 to 2 times the volume of the space 5 between the inner and outer boxes 12
Is sent, the gas 12 is exchanged in the space 5 between the inner and outer boxes.
その後、供給管13をはずし注入ヘッド３を注入口４上
に配置させる間の時間（通常のコンベア式で５秒）も、
特に注入ギャップ10をせずとも比重の差があるため、内
外箱間の空間５の下方の気体12に空気９が混じる心配は
ない（第３図の状態）。After that, the time between removing the supply pipe 13 and arranging the injection head 3 on the injection port 4 (5 seconds with a normal conveyor type)
Since there is a difference in specific gravity without forming the injection gap 10, there is no concern that the air 9 will be mixed with the gas 12 below the space 5 between the inner and outer boxes (state of FIG. 3).
次に注入ヘッド３から内外箱間の空間５にトリクロロ
フルオロメタン（Ｒ−11）等を発泡剤とする発泡性断熱
材６の原液７を注入すると、注入された原液７は、嵌合
部分８に激しく衝突し、内外箱間の空間５の気体12を巻
き込みながら泡化する（第４図の状態）。Next, when the undiluted solution 7 of the foaming heat insulating material 6 using trichlorofluoromethane (R-11) as a foaming agent is injected from the injection head 3 into the space 5 between the inner and outer boxes, the injected undiluted solution 7 is inserted into the fitting portion 8 And violently collide with the gas, and the gas 12 in the space 5 between the inner and outer boxes is entrained to form bubbles (state of FIG. 4).
その後、注入キャップ10がはめ込まれ、原液７は巻き
込んだ気体12を気泡（図示せず）の中に包含しながら、
体積膨張していき、発泡性断熱材６が完全充填し、断熱
箱体11ができる。After that, the injection cap 10 is fitted, and the stock solution 7 contains the entrained gas 12 in the bubbles (not shown),
The volume expands, the foaming heat insulating material 6 is completely filled, and the heat insulating box 11 is formed.
以上の様に本実施例によれば、内外箱間の空間５の中
の空気９を排出し、その代わりに空気よりもガスの熱伝
導率が低く、かつ比重の重い気体12を充填した上で、発
泡性断熱材６の原液７を注入するので、激しく嵌合部分
８に衝突する際に空気９を巻き込まず、前記気体12を巻
き込む。従って、体積膨張してできた発泡性断熱材６の
気泡中の主発泡剤以外のガス成分は、気体12となり、空
気９が混合している場合に比べ、（表−２）の如く、発
泡性断熱材６の熱伝導率が向上する。As described above, according to this embodiment, the air 9 in the space 5 between the inner and outer boxes is discharged, and instead, the gas 12 having a lower thermal conductivity of gas and a higher specific gravity than that of air is filled. Then, since the undiluted solution 7 of the foaming heat insulating material 6 is injected, the air 12 is not entrained when the air collides with the fitting portion 8 violently, and the gas 12 is entrained. Therefore, the gas components other than the main foaming agent in the bubbles of the expandable heat insulating material 6 formed by volume expansion become the gas 12, and as compared with the case where the air 9 is mixed, as shown in (Table 2), The thermal conductivity of the heat insulating material 6 is improved.
また、（表−１）の理想状態と比べると、二酸化炭素
等の気体を含む分まだ熱伝導率は、0.0004〜0.0008（kc
al/mh℃）向上させ得る余地を残しているが、二酸化炭
素等の気体以上の低熱伝導度を有するガス例えばトリク
ロロフルオロメタン等のフロンガスを、二酸化炭素等の
気体の代替として用いることで、さらに理想状態に近い
熱伝導率が得られる。Further, compared with the ideal state of (Table-1), the thermal conductivity is 0.0004 to 0.0008 (kc
al / mh ° C) There is room for improvement, but by using a gas having a lower thermal conductivity than a gas such as carbon dioxide, for example, a CFC gas such as trichlorofluoromethane as a substitute for the gas such as carbon dioxide, A thermal conductivity close to the ideal state can be obtained.
発明の効果 以上の様に本発明は、外箱と内箱からなる内外箱間の
空間の空気を除去し、代わりに空気よりも熱伝導率が低
くかつ比重が重い気体を充填した後、発泡性断熱材の原
液を内外箱間の空間に注入し発泡させた断熱箱体の製造
方法であるため、発泡性断熱材の気泡中に巻き込まれる
空気がなく、空気よりガス熱伝導率の低い気体が、５〜
10vol％巻き込まれる。 As described above, the present invention removes air in the space between the inner and outer boxes consisting of the outer box and the inner box, and instead fills with gas having a lower thermal conductivity and a higher specific gravity than air, and then foams. Since it is a method of manufacturing a heat insulation box body in which the undiluted solution of the heat insulation material is injected into the space between the inner and outer boxes, there is no air entrapped in the bubbles of the foam insulation material, and the gas has a lower gas thermal conductivity than air. But 5
10vol% involved.
従って、発泡性断熱材の熱伝導率が空気と前記気体の
ガス熱伝導率の向上度の分（例えば、二酸化炭素を用い
た場合は、0.0004〜0.0008kcal/mh℃）向上するという
効果があり、断熱箱体の断熱性向上が図れる。Therefore, there is an effect that the thermal conductivity of the foamable heat insulating material is improved by the degree of improvement in the gas thermal conductivity of air and the gas (for example, 0.0004 to 0.0008 kcal / mh ° C when carbon dioxide is used). The heat insulating property of the heat insulating box can be improved.
なおこの差は、300級冷蔵庫の消費電力量に換算す
ると0.3〜0.5kwh/月の大きな省電力化に寄与するという
効果がある。This difference has the effect of contributing to a large power saving of 0.3 to 0.5 kwh / month when converted to the power consumption of a 300-class refrigerator.
第１図は、本発明の一実施例を示す内箱と外箱の断面
図、第２図は第１図内外箱空間の空気除去，二酸化炭素
等の気体充填作業の断面図、第３図は、第２図二酸化炭
素等の気体充填作業完了後の状態の内箱と外箱の断面
図、第４図は、第３図内外箱間の空間へ発泡性断熱材の
原液を注入していて二酸化炭素を巻き込んでいる状態の
断面図、第５図は、第４図で注入された発泡性断熱材が
体積膨張している状態の断面図、第６図は、本発明の一
実施例における断熱箱体断面図、第７図は、従来の内箱
と外箱の断面図、第８図は、第１図の内外箱間の空間へ
発泡性断熱材の原液を注入していて空気を巻き込んでい
る状態の断面図、第９図は、第８図で注入された発泡性
断熱材が体積膨張している状態の断面図、第10図は、従
来の断熱箱体断面図である。 １……外箱、２……内箱、５……内外箱間の空間、６…
…発泡性断熱材、７……原液、９……空気、11……断熱
箱体、12……気体。FIG. 1 is a sectional view of an inner box and an outer box showing an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1 for removing air from the inner and outer box spaces, and filling a gas such as carbon dioxide, FIG. Fig. 2 is a cross-sectional view of the inner box and the outer box after the completion of the gas filling work such as carbon dioxide, and Fig. 4 is the undiluted solution of the foamable heat insulating material injected into the space between the inner and outer boxes in Fig. 3. 5 is a cross-sectional view of a state in which carbon dioxide is involved, FIG. 5 is a cross-sectional view of the foamed heat insulating material injected in FIG. 4 in a volume-expanded state, and FIG. 6 is an embodiment of the present invention. FIG. 7 is a cross-sectional view of the heat-insulating box in FIG. 7, FIG. 7 is a cross-sectional view of the conventional inner and outer boxes, and FIG. Fig. 9 is a cross-sectional view of a state in which the foamed heat insulating material injected in Fig. 8 is expanded in volume, and Fig. 10 is a cross-sectional view of a conventional heat insulating box body. That. 1 ... Outer box, 2 ... Inner box, 5 ... Space between inner and outer boxes, 6 ...
... foaming insulation, 7 ... stock solution, 9 ... air, 11 ... insulation box, 12 ... gas.
Claims (1)
を除去し、空気よりガスの熱伝導率が低くかつ、比重が
重い気体を充填して、その後に、内外箱間の空間に発泡
性断熱材の原液を注入し発泡させた断熱箱体の製造方
法。Claim: What is claimed is: 1. Air in a space between an outer box and an inner box formed of the inner box is removed, and a gas having a lower thermal conductivity of gas and a higher specific gravity than air is filled, and thereafter, a space between the inner and outer boxes is filled. A method for manufacturing a heat insulating box body in which a stock solution of a foaming heat insulating material is injected into a space and foamed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62120500A JP2558694B2 (en) | 1987-05-18 | 1987-05-18 | Manufacturing method of heat insulation box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62120500A JP2558694B2 (en) | 1987-05-18 | 1987-05-18 | Manufacturing method of heat insulation box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63286685A JPS63286685A (en) | 1988-11-24 |
| JP2558694B2 true JP2558694B2 (en) | 1996-11-27 |
Family
ID=14787739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62120500A Expired - Lifetime JP2558694B2 (en) | 1987-05-18 | 1987-05-18 | Manufacturing method of heat insulation box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558694B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5193980B2 (en) * | 2009-09-28 | 2013-05-08 | 日立アプライアンス株式会社 | refrigerator |
-
1987
- 1987-05-18 JP JP62120500A patent/JP2558694B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63286685A (en) | 1988-11-24 |
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