JP3213454B2 - Insulated box - Google Patents

Insulated box

Info

Publication number
JP3213454B2
JP3213454B2 JP24556393A JP24556393A JP3213454B2 JP 3213454 B2 JP3213454 B2 JP 3213454B2 JP 24556393 A JP24556393 A JP 24556393A JP 24556393 A JP24556393 A JP 24556393A JP 3213454 B2 JP3213454 B2 JP 3213454B2
Authority
JP
Japan
Prior art keywords
heat insulating
insulating material
box
foam
insulation
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
Application number
JP24556393A
Other languages
Japanese (ja)
Other versions
JPH07103640A (en
Inventor
良二 大越
浩一 戸室
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP24556393A priority Critical patent/JP3213454B2/en
Publication of JPH07103640A publication Critical patent/JPH07103640A/en
Application granted granted Critical
Publication of JP3213454B2 publication Critical patent/JP3213454B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Landscapes

  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Laminated Bodies (AREA)
  • Thermal Insulation (AREA)
  • Refrigerator Housings (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、外箱と内箱間の空間に
断熱材を設けて成る断熱箱体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 box provided with a heat insulating material in a space between an outer box and an inner box.

【0002】[0002]

【従来の技術】従来より冷蔵庫や低温ショーケース等を
構成する断熱箱体は、例えば特公平3−25713号公
報(F25D23/08)に示されるように、外箱と内
箱との間の空間に注入口より断熱材の原液を注入し、発
泡充填することにより形成されている。この場合、断熱
材の原液はポリオール成分とイソシアネート成分とから
成り、両成分を発泡剤、反応触媒、及び整泡剤の存在下
において反応させて硬質ポリウレタンフォームを得てい
る。
2. Description of the Related Art Conventionally, a heat insulating box constituting a refrigerator, a low-temperature showcase, or the like has a space between an outer box and an inner box as disclosed in Japanese Patent Publication No. 3-25713 (F25D23 / 08). Is formed by injecting an undiluted solution of a heat insulating material from an injection port and performing foam filling. In this case, the stock solution of the heat insulating material is composed of a polyol component and an isocyanate component, and the two components are reacted in the presence of a foaming agent, a reaction catalyst, and a foam stabilizer to obtain a rigid polyurethane foam.

【0003】一般に、独立気泡を有する硬質ポリウレタ
ンフォーム断熱材は、優れた断熱特性を生産性良く得ら
れるため、上記発泡剤としてガスの熱伝導率が極めて小
さく、また低沸点で不燃性、低毒性等優れた特性を有す
るトリクロロモノフルオロメタン(R−11)が常用さ
れていた(特開昭62−81414号参照)。
In general, a rigid polyurethane foam heat insulating material having closed cells is capable of obtaining excellent heat insulating properties with good productivity. Therefore, as a foaming agent, the heat conductivity of the gas is extremely small, and the foaming agent has a low boiling point and is nonflammable and has low toxicity. Trichloromonofluoromethane (R-11) having such excellent characteristics has been commonly used (see JP-A-62-81414).

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記発
泡剤であるトリクロロモノフルオロメタン(R−11)
は難分解性CFC(Chloro Fluoro Ca
rbon)の一つであり、この種難分解性CFCが大気
中に放出されると、成層圏におけるオゾン層への悪影響
や温室効果による地表温度上昇が生じるとされ、近年世
界的な環境汚染問題となり、これら難分解性CFCの生
産及び消費を規制する動きが高まっている。
However, the blowing agent, trichloromonofluoromethane (R-11),
Is a persistent CFC (Chloro Fluoro Ca)
If this kind of persistent CFC is released into the atmosphere, it will cause an adverse effect on the ozone layer in the stratosphere and a rise in the surface temperature due to the greenhouse effect. There is a growing movement to regulate the production and consumption of these persistent CFCs.

【0005】そこで、上記規制に制約されることの無い
シクロペンタン(C5 H10)を発泡剤として用いる発泡
技術が研究されているが、上記シクロペンタンは沸点が
+50℃と極めて高く、通常−20℃以下に冷却される
内箱に近接している部分では、このシクロペンタンが封
入された状態となっている硬質ポリウレタンフォームの
セル内においてシクロペンタンが完全に凝縮してしま
う。フォームのセル内においてシクロペンタンが凝縮す
ると、硬質ポリウレタンフォームの熱伝導率はガス状態
に比較して極めて高くなるので、その断熱性能は著しく
低下してしまう。従って、所要の断熱性能を得るために
は結果的に断熱材(硬質ポリウレタンフォーム)の厚み
を厚くしなければならなくなり、断熱箱体の庫内容積の
縮小、或いは箱体の設置スペースの拡張を来す問題があ
った。
Therefore, foaming technology using cyclopentane (C5 H10) as a foaming agent, which is not restricted by the above regulations, has been studied, but the cyclopentane has an extremely high boiling point of + 50 ° C., usually -20 ° C. In a portion adjacent to the inner box to be cooled below, cyclopentane is completely condensed in the rigid polyurethane foam cell in which the cyclopentane is sealed. When cyclopentane is condensed in the cells of the foam, the thermal conductivity of the rigid polyurethane foam becomes extremely high as compared to the gaseous state, so that the heat insulating performance thereof is significantly reduced. Therefore, in order to obtain the required heat insulating performance, the thickness of the heat insulating material (hard polyurethane foam) must be thickened as a result, and the inside volume of the heat insulating box is reduced or the space for installing the box is expanded. There was a problem to come.

【0006】本発明は、係る従来の技術的課題を解決す
るために成されたものであり、+40℃以上の高い沸点
の発泡剤を用いた場合にも、断熱材厚みの拡大を抑制し
つつ所要の断熱性能が得られる断熱箱体を提供すること
を目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem. Even when a high-boiling blowing agent having a temperature of + 40 ° C. or more is used, the thickness of the heat insulating material can be suppressed from increasing. It is an object of the present invention to provide a heat-insulating box capable of obtaining required heat-insulating performance.

【0007】[0007]

【課題を解決するための手段】請求項1の発明の断熱箱
体1は、外箱2と、内箱3と、両箱2、3間の空間に設
けた断熱材4とから構成したものであって、発泡断熱材
10を、沸点が+40℃以上の発泡剤を用いて外箱2側
に充填された第一の発泡断熱材11と、断熱材4を、沸
点が+40℃以上の発泡剤を用いて充填された発泡断熱
材7と、内箱3側に配置された真空断熱材6の多層構造
としたものである。
The heat insulating box according to the first aspect of the present invention.
The body 1 is provided in the outer box 2, the inner box 3, and the space between the two boxes 2, 3.
And a foamed heat insulating material.
10 to the outer box 2 side using a foaming agent having a boiling point of + 40 ° C or higher
The first foamed heat insulating material 11 and the heat insulating material 4 filled in
Foam insulation filled with a foaming agent whose point is + 40 ° C or higher
Multilayer structure of material 7 and vacuum heat insulating material 6 arranged on inner box 3 side
It is what it was.

【0008】請求項2の発明の断熱箱体1は、外箱2
と、内箱3と、両箱2、3間の空間に充填した発泡断熱
材10とから構成したものであって、発泡断熱材10
を、沸点が+40℃以上の発泡剤を用いて外箱2側に充
填された第一の発泡断熱材11と、低沸点の発泡剤を用
いて内箱3側に充填された第二の発泡断熱材12の多層
構造としたものである。
The heat insulating box 1 according to the second aspect of the present invention comprises the outer box 2
And foam insulation filled in the inner box 3 and the space between the two boxes 2 and 3
And a foamed heat insulating material 10
To the outer box 2 side using a blowing agent having a boiling point of + 40 ° C or higher.
Using the filled first foam insulation material 11 and a low boiling point foaming agent
Of the second foam insulation material 12 filled in the inner box 3 side
It is a structure.

【0009】更に、請求項3の発明の断熱箱体1は上記
各発明において、沸点が+40℃以上の発泡剤をシクロ
ペンタンとしたものである。
Further, the heat insulating box 1 according to the third aspect of the present invention is characterized in that
In each invention, a blowing agent having a boiling point of
It is pentane.

【0010】[0010]

【作用】請求項1の発明の断熱箱体1によれば、真空断According to the heat insulating box of the first aspect of the present invention, the vacuum is cut off.
熱材は内箱3から第一の発泡断熱材11を断熱するのThe heat material insulates the first foam insulation 11 from the inner box 3
で、第一の発泡断熱材11中の発泡剤の凝縮も防止、若To prevent the condensation of the foaming agent in the first foamed heat insulating material 11
しくは抑制することができる。Or can be suppressed.

【0011】請求項2の発明では、第二の発泡断熱材1According to the second aspect of the present invention, the second foamed heat insulating material 1
2は内箱3から第一の発泡断熱材11を断熱するので、2 insulates the first foam insulation 11 from the inner box 3,
第一の発泡断熱材11中の発泡剤の凝縮も防止、若しくPrevents condensation of the foaming agent in the first foam insulation 11
は抑制することができる。総じて、第一の発泡断熱材1Can be suppressed. Generally, the first foam insulation 1
1のみの場合に比して、内箱3が低温となった場合の断When the temperature of the inner box 3 becomes low compared to the case of only
熱材10全体としての断熱性能が向上し、断熱材10全The heat insulation performance of the entire heat material 10 is improved, and the heat insulation material 10
体の厚みを薄くしつつ所要の断熱性能を得ることができThe required heat insulation performance can be obtained while reducing the thickness of the body
るようになる。Become so.

【0012】[0012]

【実施例】以下、図面を参照しながら本発明の実施例を
詳述する。
Embodiments of the present invention will be described below in detail with reference to the drawings.

【0013】 断熱箱体1の平断面図を示してい
る。実施例の断熱箱体1は家庭用の冷凍冷蔵庫を構成す
るものであり、図1は冷凍室F部分の平断面を示してい
る。
FIG . 1 is a plan sectional view of the heat insulating box 1. The heat-insulating box 1 of the embodiment constitutes a home refrigerator-freezer, and FIG.

【0014】 の断熱箱体1は、前面に開口した鋼板製
の外箱2と、この外箱2内に間隔を存して組み込まれた
同じく前面に開口するABS樹脂等の硬質合成樹脂製の
内箱3と、両箱2、3間に設けられた断熱材4とから構
成されている。
[0014] insulation box 1 This includes an outer box 2 made of steel which is open to the front, made of hard synthetic resin such as ABS resin which opens the same front embedded at intervals in the outer box in the 2 , And a heat insulating material 4 provided between the two boxes 2, 3.

【0015】そして、この断熱材4は真空断熱材6と発
泡断熱材7との二層構造となっている。前記真空断熱材
6は、粉体状の無機物質を所定厚みの板状に真空パック
したものであり、低温に対して極めて高い断熱性能を備
えている。係る真空断熱材6は、前記発泡断熱材7が充
填される以前に、外箱2の上下左右の各壁内面の略全域
に渡って両面テープ等にて予め取り付けて置く。
The heat insulating material 4 has a two-layer structure of a vacuum heat insulating material 6 and a foam heat insulating material 7. The vacuum heat insulating material 6 is obtained by vacuum-packing a powdered inorganic substance into a plate having a predetermined thickness, and has extremely high heat insulating performance at low temperatures. Before the vacuum heat insulating material 7 is filled, the vacuum heat insulating material 6 is attached with a double-sided tape or the like in advance over substantially the entire inner surface of each of the upper, lower, left and right walls of the outer box 2.

【0016】一方、発泡断熱材7は、ポリエーテルポリ
オールとポリイソシアネートを主成分としており、発泡
剤としては規制対象外のシクロペンタン(C5 H10)を
用いている。係る発泡断熱材7を充填する際には、上記
の如く外箱2の内面に真空断熱材6を取り付け、内箱3
を組み込んだものを図示しない発泡型にセットする。そ
して、前記ポリエーテルポリオールをシクロペンタンの
発泡剤により希釈してレジンとし、このレジン及び前記
ポリイソシアネートの液を所定の割合で混合した原液を
高圧発泡機により図示しない注入口から外箱2(真空断
熱材6)及び内箱3間の空間に吐出する。
On the other hand, the foamed heat insulating material 7 contains polyether polyol and polyisocyanate as main components, and cyclopentane (C5 H10) which is not regulated is used as a foaming agent. When filling the foam heat insulating material 7, the vacuum heat insulating material 6 is attached to the inner surface of the outer box 2 as described above, and the inner box 3
Is set in a foaming mold (not shown). Then, the polyether polyol is diluted with a cyclopentane blowing agent to form a resin, and an undiluted solution obtained by mixing the resin and the polyisocyanate at a predetermined ratio is injected from an inlet (not shown) to the outer box 2 (vacuum) by a high-pressure foaming machine. It is discharged into the space between the heat insulating material 6) and the inner box 3.

【0017】注入された原液中のポリエーテルポリオー
ルとポリイソシアネートは反応を開始してポリウレタン
を生成すると共に、この反応熱によりシクロペンタンが
ガス化してフォームに封じ込められる。一方、ポリウレ
タンフォームが膨張して内外箱3、2間の空間内に充満
し、真空断熱材6・・と外箱2の内面、及び、内箱7の
外面に接着固化することにより、硬質ポリウレタンフォ
ームの発泡断熱材7が形成される。
[0017] The polyether polyol and polyisocyanate in the injected stock solution start a reaction to form polyurethane, and the heat of the reaction gasifies cyclopentane to be sealed in the foam. On the other hand, the polyurethane foam expands and fills the space between the inner and outer boxes 3 and 2, and is adhered and solidified on the vacuum heat insulating material 6 and the inner surface of the outer box 2 and the outer surface of the inner box 7. A foam foam insulation 7 is formed.

【0018】係る構造の断熱箱体1において、冷凍室F
内が例えば−20℃以下に冷却されると、内箱3に接し
ている発泡断熱材7も−20℃近くまで冷却される。一
方、発泡断熱材7中のシクロペンタンの沸点は前述の如
く+50℃であるから、−20℃等の低温となる内箱3
側の発泡断熱材7中のシクロペンタンは凝縮する。
In the heat insulating box 1 having such a structure, the freezing room F
When the inside is cooled to, for example, −20 ° C. or less, the foamed heat insulating material 7 in contact with the inner box 3 is also cooled to near −20 ° C. On the other hand, since the boiling point of cyclopentane in the foamed heat insulating material 7 is + 50 ° C. as described above, the inner box 3 having a low temperature such as -20 ° C.
The cyclopentane in the foam insulation 7 on the side condenses.

【0019】発泡断熱材7のフォームのセル中にガス化
していたシクロペンタンが凝縮すると、その熱伝導率は
著しく上昇するが、それでも内箱3から所定距離離れた
位置の発泡断熱材7は、そこと内箱3との間の発泡断熱
材7により断熱されるため、シクロペンタンの凝縮現象
は停止し、所定の断熱性能を維持するようになる。そし
て、外箱2の内面には真空断熱材6・・が取り付けられ
ているので、発泡断熱材7のみの場合に比して、内箱3
が低温となった場合の断熱材4全体としての断熱性能は
著しく向上する。従って、発泡断熱材7のみの場合より
も断熱材4全体の厚みを薄くしつつ所要の断熱性能を得
ることができるようになり、冷凍室F等の庫内空間を拡
張し、或いは断熱箱体1の設置スペースの縮小を図るこ
とが可能となる。
When the gaseous cyclopentane is condensed in the foam cells of the foam insulating material 7, the thermal conductivity thereof is significantly increased. However, the foam insulating material 7 located at a predetermined distance from the inner box 3 still has Since insulation is provided by the foam heat insulating material 7 between the inner box 3 and the inner box 3, the condensation of cyclopentane stops, and the predetermined heat insulating performance is maintained. Since the vacuum heat insulating material 6 is attached to the inner surface of the outer case 2, the inner case 3 is compared with the case where only the foam heat insulating material 7 is provided.
When the temperature becomes low, the heat insulating performance of the heat insulating material 4 as a whole is significantly improved. Therefore, the required heat insulating performance can be obtained while reducing the thickness of the entire heat insulating material 4 as compared with the case where only the foam heat insulating material 7 is used. 1, it is possible to reduce the installation space.

【0020】尚、実施例によらず真空断熱材6・・を内
箱3の外面に取り付け、発泡断熱材7を外箱2側に充填
しても良く、更に内箱3の外面と外箱2の内面に真空断
熱材6・・を取り付け、それらの間に発泡断熱材7を充
填して三層構造としても良い。その場合は発泡断熱材7
が真空断熱材6・・により内箱3から断熱されるので、
シクロペンタンの凝縮が防止若しくは抑制され、断熱材
4全体としての断熱性能は更に向上することが期待でき
る。
In addition, regardless of the embodiment, the vacuum heat insulating material 6 may be attached to the outer surface of the inner box 3 and the foam heat insulating material 7 may be filled in the outer box 2 side. A vacuum heat insulating material 6 is attached to the inner surface of 2 and a foam heat insulating material 7 is filled between them to form a three-layer structure. In that case, foam insulation 7
Is insulated from the inner box 3 by the vacuum heat insulating material 6.
It is expected that the condensation of cyclopentane is prevented or suppressed, and the heat insulating performance of the heat insulating material 4 as a whole is further improved.

【0021】しかしながら、内箱3の形状は通常複雑で
あるため、真空断熱材6の取り付け作業が困難となるば
かりでなく、内箱3には種々の機器が後に取り付けられ
るので、係る機器を取り付けるためのネジ等によって真
空断熱材6が損傷を受け、断熱性能が低下する危険性が
大きい。一方、外箱6の内面は内箱3に比して平坦であ
り、実施例の如く真空断熱材6を外箱2に取り付け、真
空断熱材6と内箱3との間に発泡断熱材7を充填すれ
ば、真空断熱材6の取り付け作業が容易となると共に、
内箱3に取り付けられる各種機器により真空断熱材6が
損傷を受ける危険性も無くなる。
However, since the shape of the inner box 3 is usually complicated, not only the work of attaching the vacuum heat insulating material 6 becomes difficult, but also various devices are attached to the inner box 3 later. There is a great risk that the vacuum heat insulating material 6 will be damaged by screws or the like, and the heat insulating performance will be reduced. On the other hand, the inner surface of the outer box 6 is flatter than the inner box 3, and the vacuum heat insulating material 6 is attached to the outer box 2 as in the embodiment, and the foam heat insulating material 7 is interposed between the vacuum heat insulating material 6 and the inner box 3. Filling, the work of attaching the vacuum heat insulating material 6 becomes easy,
There is no danger of the vacuum heat insulating material 6 being damaged by various devices attached to the inner box 3.

【0022】次に、図2本発明の断熱箱体1を示して
いる。この場合も断熱箱体1は、前面に開口した鋼板製
の外箱2と、この外箱2内に間隔を存して組み込まれた
同じく前面に開口するABS樹脂等の硬質合成樹脂製の
内箱3と、両箱2、3間に設けられた発泡断熱材10と
から構成されている。
Next, FIG. 2 shows the insulation box 1 of the present invention. Also in this case, the heat-insulating box 1 is made of an outer box 2 made of a steel plate opened to the front and a hard synthetic resin made of a hard resin such as an ABS resin which is also incorporated in the outer box 2 and is opened at the front. It comprises a box 3 and a foam heat insulating material 10 provided between the boxes 2 and 3.

【0023】そして、この発泡断熱材10は第一の発泡
断熱材11と第二の発泡断熱材12との二層構造となっ
ている。第二の発泡断熱材12は、ポリエーテルポリオ
ールとポリイソシアネートを主成分としており、発泡剤
としては水を用いている。そして、前記ポリエーテルポ
リオールを水により希釈してレジンとし、このレジン及
び前記ポリイソシアネートの液を所定の割合で混合した
原液を高圧発泡機により内箱3の周囲に吹き付ける。
The foam insulation 10 has a two-layer structure of a first foam insulation 11 and a second foam insulation 12. The second foamed heat insulating material 12 contains polyether polyol and polyisocyanate as main components, and uses water as a foaming agent. Then, the polyether polyol is diluted with water to form a resin, and a stock solution obtained by mixing the resin and the liquid of the polyisocyanate at a predetermined ratio is sprayed around the inner box 3 by a high-pressure foaming machine.

【0024】吹き付けられた原液中のポリエーテルポリ
オールとポリイソシアネートは反応を開始してポリウレ
タンを生成すると共に、ポリイソシアネートと水が反応
して炭酸ガスを発生し、この炭酸ガスがフォームに封じ
込められる。一方、ポリウレタンフォームが膨張し、内
箱3外面に接着固化することにより、所定厚みの硬質ポ
リウレタンフォームから成る第二の発泡断熱材12が形
成される。
The polyether polyol and the polyisocyanate in the sprayed stock solution start a reaction to form polyurethane, and the polyisocyanate and water react to generate carbon dioxide gas, which is sealed in the foam. On the other hand, the polyurethane foam expands and is adhered and solidified on the outer surface of the inner box 3, whereby the second foamed heat insulating material 12 made of a rigid polyurethane foam having a predetermined thickness is formed.

【0025】一方、第一の発泡断熱材11は、ポリエー
テルポリオールとポリイソシアネートを主成分としてお
り、発泡剤としては前記シクロペンタンを用いている。
係る第一の発泡断熱材11を充填する際には、上記の如
く内箱3の外面に第二の発泡断熱材12を形成し、外箱
2内にを組み込んだものを図示しない発泡型にセットす
る。そして、前記ポリエーテルポリオールをシクロペン
タンの発泡剤により希釈してレジンとし、このレジン及
び前記ポリイソシアネートの液を所定の割合で混合した
原液を高圧発泡機により図示しない注入口から外箱2及
び第二の発泡断熱材12間の空間に吐出する。
On the other hand, the first foamed heat insulating material 11 contains polyether polyol and polyisocyanate as main components, and the above-mentioned cyclopentane is used as a foaming agent.
When the first foamed heat insulating material 11 is filled, the second foamed heat insulating material 12 is formed on the outer surface of the inner box 3 as described above, and the inside of the outer box 2 is assembled into a foaming mold (not shown). set. Then, the polyether polyol is diluted with a blowing agent of cyclopentane to form a resin, and an undiluted solution obtained by mixing the resin and the liquid of the polyisocyanate at a predetermined ratio is injected from an inlet (not shown) to the outer box 2 and the It is discharged into the space between the two foam insulation materials 12.

【0026】注入された原液中のポリエーテルポリオー
ルとポリイソシアネートは反応を開始してポリウレタン
を生成すると共に、この反応熱によりシクロペンタンが
ガス化してフォームに封じ込まれることにより、ポリウ
レタンフォームが膨張して外箱3及び第二の発泡断熱材
12間の空間内に充満し、外箱2の内面、及び、第二の
発泡断熱材12の外面に接着固化することにより、硬質
ポリウレタンフォームの第一の発泡断熱材11が形成さ
れる。
The polyether polyol and polyisocyanate in the injected stock solution start a reaction to form polyurethane, and the heat of the reaction gasifies cyclopentane to be sealed in the foam, whereby the polyurethane foam expands. By filling the space between the outer box 3 and the second foamed heat insulating material 12 and bonding and solidifying it on the inner surface of the outer box 2 and the outer surface of the second foamed heat insulating material 12, Is formed.

【0027】係る構造の断熱箱体1において、冷凍室F
内が例えば−20℃以下に冷却されると、内箱3に接し
ている第二の発泡断熱材12も−20℃近くまで冷却さ
れる。一方、第二の発泡断熱材12中の炭酸ガスの沸点
は極めて低い(−200℃)から、−20℃等の低温と
なっても第二の発泡断熱材12中の炭酸ガスが凝縮する
ことは無く、所定の断熱性能を維持する。
In the heat insulating box 1 having such a structure, the freezing room F
When the inside is cooled to, for example, −20 ° C. or less, the second foamed heat insulating material 12 in contact with the inner box 3 is also cooled to near −20 ° C. On the other hand, since the boiling point of the carbon dioxide gas in the second foamed heat insulating material 12 is extremely low (−200 ° C.), the carbon dioxide gas in the second foamed heat insulating material 12 condenses even at a low temperature such as −20 ° C. No, maintain a predetermined heat insulation performance.

【0028】一方、第一の発泡断熱材11中のシクロペ
ンタンは前述の如く沸点が高い(+50℃)が、第二の
発泡断熱材12により断熱されるため、シクロペンタン
の凝縮は防止若しくは抑制される。従って、第一の発泡
断熱材11のみの場合に比して、内箱3が低温となった
場合の発泡断熱材10全体としての断熱性能は著しく向
上するため、第一の発泡断熱材11のみの場合よりも発
泡断熱材10全体の厚みを薄くしつつ所要の断熱性能を
得ることができるようになり、冷凍室F等の庫内空間を
拡張し、或いは断熱箱体1の設置スペースの縮小を図る
ことが可能となる。
On the other hand, the cyclopentane in the first foamed heat insulating material 11 has a high boiling point (+ 50 ° C.) as described above, but is insulated by the second foamed heat insulating material 12, so that condensation of cyclopentane is prevented or suppressed. Is done. Therefore, as compared with the case of using only the first foamed heat insulating material 11, the heat insulating performance of the foamed heat insulating material 10 as a whole when the inner box 3 becomes low temperature is remarkably improved. The required heat insulating performance can be obtained while reducing the overall thickness of the foamed heat insulating material 10 as compared with the case of the above case, and the space inside the refrigerator room F or the like is expanded, or the installation space of the heat insulating box 1 is reduced. Can be achieved.

【0029】尚、実施例では断熱材10を第一の発泡断
熱材11と第二の発泡断熱材12の二層構造としたが、
第一の発泡断熱材11中に更に第二の発泡断熱材12の
層を形成する等により、更に多層の構造としても差し支
えない。また、実施例では炭酸ガスによって第二の発泡
断熱材12を発泡させたが、それに限らず、内箱3から
の冷却によっても凝縮し難い沸点の低い発泡剤であれば
良く、その他にはモノクロロジフルオロメタン(R−2
2)や、R−22と1−クロロ−1,1−ジフルオロエ
タン(R−142b)との混合物、或いは、R−134
a等も考えられる。但し、実施例の如く水を発泡剤に用
いれば、完全なる脱フロンを達成できる。
In the embodiment, the heat insulating material 10 has a two-layer structure of the first foam heat insulating material 11 and the second foam heat insulating material 12.
By forming a layer of the second foamed heat insulating material 12 in the first foamed heat insulating material 11 or the like, a multi-layered structure may be used. In the embodiment, the second foamed heat insulating material 12 is foamed with carbon dioxide gas. However, the present invention is not limited to this, and any foaming agent having a low boiling point that is not easily condensed by cooling from the inner box 3 may be used. Difluoromethane (R-2
2) or a mixture of R-22 and 1-chloro-1,1-difluoroethane (R-142b), or R-134
a and the like are also conceivable. However, if water is used as the foaming agent as in the embodiment, complete chlorofluorocarbon can be achieved.

【0030】更に、上記の発泡断熱材7及び第一の発泡
断熱材11において、シクロペンタンを発泡剤として用
いたが、その他にも、沸点が+40℃以上のHFC(H
ydro Fluoro Carbonであり、規制
外)や、HFC+ヘトロ化合物等を用いても有効であ
る。
Further, cyclopentane is used as a foaming agent in the foamed heat insulating material 7 and the first foamed heat insulating material 11, but in addition, HFC (H) having a boiling point of + 40 ° C. or more can be used.
hydrofluorocarbon, which is not regulated), and it is effective to use HFC + hetero compound.

【0031】以上詳述した如く、本願によれば、内外箱
間に設けられる断熱材を、沸点が+40℃以上の発泡剤
を用いて充填された発泡断熱材と、真空断熱材の多層構
造としたものであるから、発泡断熱材のみの場合に比し
て、内箱が低温となった場合の断熱材全体としての断熱
性能が著しく向上する。従って、発泡断熱材のみの場合
よりも断熱材全体の厚みを薄くしつつ所要の断熱性能を
得ることができるようになり、それによって、断熱箱体
の庫内容積を拡張し、或いは断熱箱体の設置スペースの
縮小を図ることが可能となるものである。
As described above in detail, according to the present invention, the heat insulating material provided between the inner and outer boxes is made of a foam heat insulating material filled with a foaming agent having a boiling point of + 40 ° C. or more, and a multilayer structure of a vacuum heat insulating material. Therefore, the heat insulation performance of the entire heat insulating material when the inner box is at a low temperature is remarkably improved as compared with the case where only the foam heat insulating material is used. Therefore, it becomes possible to obtain the required heat insulating performance while reducing the thickness of the entire heat insulating material as compared with the case of using only the foam heat insulating material, whereby the internal volume of the heat insulating box is expanded or the heat insulating box is expanded. It is possible to reduce the installation space.

【0032】また、本願によれば上記において、外箱に
真空断熱材が取り付けられ、真空断熱材の内箱側に発泡
断熱材が充填されたものであるから、真空断熱材の取り
付け作業が容易となると共に、通常金属で形成された外
箱により真空断熱材が保護されて真空破壊を生じる危険
が少なく、内箱側に取り付けられる各種機器により真空
断熱材が損傷を受ける危険性も無くなる。
Further, according to the present invention , the vacuum heat insulating material is attached to the outer box and the foam heat insulating material is filled on the inner box side of the vacuum heat insulating material. At the same time, the vacuum heat insulating material is protected by the outer box, which is usually made of metal, so that there is little danger of vacuum breakage, and there is no danger of the vacuum heat insulating material being damaged by various devices attached to the inner box side.

【0033】更に、本願によれば、内外箱間に充填され
る発泡断熱材を、沸点が+40℃以上の発泡剤を用いて
外箱側に充填された第一の発泡断熱材と、低沸点の発泡
剤を用いて内箱側に充填された第二の発泡断熱材の多層
構造としたものであるから、内箱が低温(例えば冷凍温
度)となった場合にも第二の発泡断熱材は所要の断熱性
能を維持できると共に、第二の発泡断熱材が内箱から第
一の発泡断熱材を断熱するので、第一の発泡断熱材中の
発泡剤の凝縮も防止、若しくは抑制することができる。
総じて、第一の発泡断熱材のみの場合に比して、内箱が
低温となった場合の断熱材全体としての断熱性能が著し
く向上し、断熱材全体の厚みを薄くしつつ所要の断熱性
能を得ることができるようになるので、断熱箱体の庫内
容積を拡張し、或いは断熱箱体の設置スペースの縮小を
図ることが可能となるものである。
Further, according to the present invention , the foamed heat insulating material filled between the inner and outer boxes is composed of the first foamed heat insulating material filled on the outer box side with a foaming agent having a boiling point of + 40 ° C. or more, and a low boiling point. The second foamed heat insulating material is formed into a multi-layer structure of the second foamed heat insulating material filled in the inner box side by using the foaming agent of the second foamed heat insulating material even when the inner box becomes low temperature (for example, freezing temperature). Can maintain the required thermal insulation performance and prevent or suppress the condensation of the foaming agent in the first foamed insulation because the second foamed insulation insulates the first foamed insulation from the inner box. Can be.
In general, compared to the case of using only the first foamed insulation material, the heat insulation performance of the whole heat insulation material when the inner box is at a low temperature is remarkably improved, and the required heat insulation performance while reducing the thickness of the whole heat insulation material Can be obtained, so that the internal volume of the heat insulating box can be expanded or the installation space of the heat insulating box can be reduced.

【0034】更にまた、本願の如く沸点の高い発泡剤と
してシクロペンタンを使用すれば、規制フロンを使用す
ることなく、環境保護に寄与した断熱箱体を提供するこ
とができるものである。
Furthermore, if cyclopentane is used as a blowing agent having a high boiling point as in the present invention , it is possible to provide a heat-insulating box body that contributes to environmental protection without using chlorofluorocarbon.

【発明の効果】【The invention's effect】

【0035】[0035] 以上詳述した如く請求項1の発明によれAs described in detail above, according to the invention of claim 1
ば、真空断熱材が内箱から第一の発泡断熱材を断熱するIf the vacuum insulation insulates the first foam insulation from the inner box
ので、第一の発泡断熱材中の発泡剤の凝縮も防止、若しPrevents condensation of the foaming agent in the first foam insulation,
くは抑制することができる。総じて、第一の発泡断熱材Can be suppressed. Overall, the first foam insulation
のみの場合に比して、内箱が低温となった場合の断熱材Insulation when the inner box is cold compared to the case only
全体としての断熱性能が著しく向上し、断熱材全体の厚The overall thermal insulation performance has been significantly improved,
みを薄くしつつ所要の断熱性能を得ることができるようTo obtain the required heat insulation performance while reducing the thickness
になるので、断熱箱体の庫内容積を拡張し、或いは断熱To increase the internal volume of the insulation box, or to insulate
箱体の設置スペースの縮小を図ることが可能となる。It is possible to reduce the installation space of the box.

【0036】 また、請求項2の発明によれば、内箱が低
温(例えば冷凍温度)となった場合にも第二の発泡断熱
材は所要の断熱性能を維持できると共に、第二の発泡断
熱材が内箱から第一の発泡断熱材を断熱するので、第一
の発泡断熱材中の発泡剤の凝縮も防止、若しくは抑制す
ることができる
Further, according to the second aspect of the invention, a low inner box
Second foam insulation even when the temperature (for example, freezing temperature)
The material can maintain the required thermal insulation performance, and the second foam break
Since the heat material insulates the first foam insulation from the inner box,
Also prevents or suppresses the condensation of the foaming agent in the foam insulation
Can be

【0037】[0037] 更にまた、請求項3の発明の如く沸点の高Furthermore, as in the third aspect of the present invention, the high boiling point
い発泡剤としてシクロペンタンを使用すれば、規制フロIf cyclopentane is used as a blowing agent,
ンを使用することなく、環境保護に寄与した断熱箱体をInsulated box that contributes to environmental protection without using
提供することができるものである。That can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の断熱箱体の平断面図である。FIG. 1 is a plan sectional view of a heat insulating box of the present invention.

【図2】もう一つの本発明の断熱箱体の平断面図であ
る。
FIG. 2 is a plan sectional view of another heat insulating box of the present invention.

【符号の説明】[Explanation of symbols]

1 断熱箱体 2 外箱 3 内箱 4 断熱材 6 真空断熱材 7 発泡断熱材 10 発泡断熱材 11 第一の発泡断熱材 12 第二の発泡断熱材 DESCRIPTION OF SYMBOLS 1 Insulation box 2 Outer box 3 Inner box 4 Insulation material 6 Vacuum insulation material 7 Foam insulation material 10 Foam insulation material 11 First foam insulation material 12 Second foam insulation material

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−204090(JP,A) 特開 平3−152160(JP,A) 特開 平1−114685(JP,A) 特開 平2−205582(JP,A) 特開 平1−263041(JP,A) 実開 平4−70995(JP,U) 実開 昭56−21524(JP,U) (58)調査した分野(Int.Cl.7,DB名) F25D 23/06 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-204090 (JP, A) JP-A-3-152160 (JP, A) JP-A 1-114685 (JP, A) JP-A-2- 205582 (JP, A) JP-A-1-263041 (JP, A) JP-A-4-70995 (JP, U) JP-A-56-21524 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F25D 23/06

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 外箱と、内箱と、両箱間の空間に充填し
た発泡断熱材とから成る断熱箱体において、 前記発泡断熱材を、沸点が+40℃以上の発泡剤を用い
て前記外箱側に充填された第一の発泡断熱材と、前記内
箱側に設けた真空断熱材の多層構造としたことを特徴と
する断熱箱体。
1. An outer box, an inner box, and a space between the two boxes.
In a heat insulating box comprising a foamed heat insulating material, a foaming agent having a boiling point of + 40 ° C. or more is used as the foamed heat insulating material.
A first foam insulation material filled in the outer box side
It is characterized by having a multilayer structure of vacuum insulation material provided on the box side
Heat insulation box.
【請求項2】 外箱と、内箱と、両箱間の空間に充填
した発泡断熱材とから成る断熱箱体において、 前記発泡断熱材を、沸点が+40℃以上の発泡剤を用い
て前記外箱側に充填された第一の発泡断熱材と、低沸点
の発泡剤を用いて前記内箱側に充填された第二の発泡断
熱材の多層構造としたことを特徴とする断熱箱体。
2. The outer box, the inner box, and the space between the two boxes are filled.
In a heat insulating box made of a foamed heat insulating material, a foaming agent having a boiling point of + 40 ° C. or more is used as the foamed heat insulating material.
A first foam insulation material filled in the outer box side, and a low boiling point
Foaming agent filled in the inner box side using a foaming agent
An insulated box body having a multi-layered structure of heat material.
【請求項3】 前記沸点が+40℃以上の発泡剤はシク
ロペンタンであることを特徴とする請求項1または請求
項2に記載の断熱箱体。
3. The blowing agent having a boiling point of + 40 ° C. or higher
Claim 1 or Claim which is lopentane
Item 3. An insulated box according to Item 2.
JP24556393A 1993-09-30 1993-09-30 Insulated box Expired - Lifetime JP3213454B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24556393A JP3213454B2 (en) 1993-09-30 1993-09-30 Insulated box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24556393A JP3213454B2 (en) 1993-09-30 1993-09-30 Insulated box

Publications (2)

Publication Number Publication Date
JPH07103640A JPH07103640A (en) 1995-04-18
JP3213454B2 true JP3213454B2 (en) 2001-10-02

Family

ID=17135573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24556393A Expired - Lifetime JP3213454B2 (en) 1993-09-30 1993-09-30 Insulated box

Country Status (1)

Country Link
JP (1) JP3213454B2 (en)

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JP2007107877A (en) * 2006-12-04 2007-04-26 Matsushita Refrig Co Ltd Refrigerator
JP4390014B2 (en) * 2008-11-28 2009-12-24 パナソニック株式会社 refrigerator
JP5544254B2 (en) * 2010-09-14 2014-07-09 日立アプライアンス株式会社 refrigerator
US10253151B2 (en) 2012-12-11 2019-04-09 Asahi Kasei Construction Materials Corporation Phenolic resin foam and method for producing the same
AU2014276244B2 (en) * 2013-06-07 2016-05-19 Mitsubishi Electric Corporation Heat insulating box body, refrigerator, and device including heat insulating box body
JP6140279B2 (en) * 2013-06-07 2017-05-31 三菱電機株式会社 Insulated box and refrigerator
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Publication number Priority date Publication date Assignee Title
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Also Published As

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