JPS6346319B2 - - Google Patents
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- Publication number
- JPS6346319B2 JPS6346319B2 JP55029554A JP2955480A JPS6346319B2 JP S6346319 B2 JPS6346319 B2 JP S6346319B2 JP 55029554 A JP55029554 A JP 55029554A JP 2955480 A JP2955480 A JP 2955480A JP S6346319 B2 JPS6346319 B2 JP S6346319B2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- heat insulating
- outer walls
- insulation
- materials
- 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
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- Thermal Insulation (AREA)
Description
「産業上の利用分野」
本発明は、軽量でかつ断熱性能の秀れた真空断
熱構造体に関するものである。
「従来の技術」
一般に冷凍コンテナー、液化ガス貯槽等断熱を
要する構造体では、断熱性能を向上するため断熱
壁を真空構造体とすることは良く知られている。
しかるに断熱壁を真空構造体に形成する場合は、
真空構造体を形成する内外壁に真空荷重がかか
り、このため、壁材に真空荷重に充分耐え得るよ
う厚肉材料を使用することとなる。しかしながら
壁材として厚肉材料を使用すると、重量が重くな
ると共に、加工に極めて多くの労力を費やすばか
りか、特に開口部を設けた断熱層では厚肉材料に
より熱侵入が増大する欠点があつた。このような
ことから薄肉材料を壁材として使用し得る真空断
熱構造体が種々開発されている。この種の真空断
熱構造体は、内外壁の間に真空荷重を受けるた
め、耐圧縮性の成形断熱材を支持材として装填す
るものであるが、耐圧縮性を満足するものは一般
に嵩比重が大きくなり、この結果このような断熱
材は熱伝導度が大きくなり断熱性能の点で問題が
あつた。
上述の如き現状から本発明出願人は先にケイ酸
カルシウムの如き連続開気孔構造を有する耐圧縮
性、低熱伝導度の無機質材料成形体を支持材とし
て使用することを提案した。（特願昭52−43061
号）
このような成形体としてはたとえば前記したケ
イ酸カルシウムの外に、セラミツクフオーム、石
膏等の連続開気孔構造を有するものがあり、これ
ら成形体は耐圧縮荷重が２Kg／cm3以上を有し、し
かも熱伝導度が真空下で0.01kcal／ｍｈ℃以下で
あり、連続開気孔構造を有していることより、真
空排気効果も著しいものである。
「発明が解決しようとする問題点」
しかしながら、前記無機質材料を支持材として
使用した場合においても、支持材として機能する
必要上、前記無機質材料支持材は、断熱層を形成
する内外壁に密着して固定することから、支持材
として使用している無機質材料を伝導してくる熱
侵入を避けることは出来ない。従つて前記支持材
として使用する材料としては可及的に低熱伝導度
の材料を使用することが好ましい。
そして熱伝導度の低い断熱材としてはパーライ
ト、シラスバルーン、ガラスバルーンの如き粉体
（10-2Torr以下の真空下での熱伝導度約
0.002kcal／ｍｈ℃、但し常圧下では0.02kcal／
ｍｈ℃、）や、ガラスウール、シリカアルミナウ
ール、シリカウール、カーボンウール等の繊維状
物質（10-2Torr以下の真空下での熱伝導度約
0.003kcal／ｍｈ℃、但し常圧下では0.03kcal／
ｍｈ℃、）があるが、これらは前記した如く圧縮
荷重を受けることが不可能で、このため真空下で
これ等の断熱材を使用すれば前記した如く壁材と
して厚肉材料を使用することが必要となり、重量
が重くなることは必定である。又前記、粉体、繊
維状断熱材を用いた断熱層内を真空排気すると、
前記粉体、繊維状断熱材を吸引してその排気操作
を阻害するという新たな問題も生じる。
本発明は上述の如く現状に鑑み、軽量かつ圧縮
荷重に耐え得ると共に、断熱性能が秀れかつ真空
排気操作を支障なく行えるようにした製作容易な
真空断熱構造体を提供することを目的とするもの
である。
「問題点を解決するための手段」
本発明の真空断熱構造体では、該真空断熱構造
体を形成する内外壁の間に、内外壁の形状に合せ
て内外壁の縁端周辺に沿つて連続開気孔構造を有
する無機質材料からなり真空排気時にフイルター
として機能する補強枠体をそれぞれ前記内外壁に
密着して固定すると共に、前記以外の空間に粉体
状断熱材あるいは繊維状断熱材を緊密に充填し
て、前記内外壁間を真空に保持したことを上記問
題点の解決手段とした。
「作用」
本発明の真空断熱構造体によれば、連続開気孔
構造を有する無機質材料の補強枠体を設けたの
で、目的とする真空断熱層を形成するため真空排
気しても形状が変形したり崩れたりすることがな
く、しかも内外壁が真空荷重を受けても充分耐え
得るので、内外壁の材料を薄板材料にすることが
可能となる。
また、内外壁が真空荷重を受けても充分耐え得
るので、内外壁の材料を薄肉に維持しつつ、上記
無機質材料より熱伝導度の低い粉体状断熱材ある
いは繊維状断熱材を充填使用し得たため、断熱性
能の一層の向上を図ることができる。
さらに、無機質材料からなり真空排気時にフイ
ルターとして機能する補強枠体を配したので、該
補強枠体を介して吸引排気操作を行うことによ
り、真空排気時において粉体状断熱材が排気操作
を阻害するという問題を解消することができる。
「実施例」
以下本発明の真空熱構造体を図面により説明す
る。
第１図は本発明の真空断熱構造体を板状に形成
した実施態様を示すもので、１ａ，１ａ，１ｃ，
１ｄ，１ｅ，１ｆはアルミニウム、ステンレス等
の熱伝導の低い金属薄板よりなる壁材で、２はケ
イ酸カルシウム、石膏、セラミツクフオーム等の
連続開気孔構造で耐圧縮性（少くとも耐圧縮荷重
２Kg／cm2）低熱伝導度（10-2Torr以下の真空下
で0.01kcal／ｍｈ℃、但し常圧下では、
0.033kcal／ｍｈ℃、）の無機質材料よりなる支持
用枠体で、該枠体２は形成すべき板状の真空構造
体の形状に合せて、その縁端四周に沿つて枠体を
構成して、前記壁材１ａ，１ｂ間に密着するよう
に構成されている。３は前記支持用枠体２で形成
される空間４に、該空間４の広さに応じて適宜空
間４を縦横あるいは筋交い方向に横切つて設けら
れる棧体で、該棧体３は前記枠体２と同様ケイ酸
カルシウム、石膏、セラミツクフオーム等の無機
質材料より構成されている。５は前記枠体２、及
び棧体３で仕切られて生じる空間４，４′に充填
された粉体状断熱材、あるいは繊維状断熱材であ
る。これらの断熱材としては粉体状断熱材では、
パーライト、シラスバルーン、ガラスバルーン等
がその熱伝導度より好ましく、又繊維状断熱材で
はガラスウール、シリカアルミナウール、シリカ
ウール、カーボンウール等が同様に好ましい。こ
のように壁材１ａ，１ｂ間にそれぞれ枠体２、棧
体３及び粉体状断熱材あるいは繊維状断熱材を配
置した後、側方壁材１ｃ，１ｄ，１ｅ，１ｆを枠
体２に沿つて壁材１ａ，１ｂと溶着して真空排気
孔６を除いて密封し、真空排気後前記排気口６を
密閉して内部を少くとも10-2Torr以下の真空度
を保持して板状の真空断熱構造体とする。
第２図は円筒状の断熱容器に本発明の真空断熱
構造体構造を適用したもので、１１は外槽、１２
は内槽で、頂部鏡板部１３の外槽１１、内槽１２
間に縁端周方向に沿つて環状枠体１４を、又底部
１５の外槽１１、内槽１２間に縁端周方向に沿つ
て環状枠体１４′を、又胴部１６の外槽１１、内
槽１２間に適宜な数の環状枠体１４″…をそれぞ
れ外槽１１、内槽１２に密着して固定設置し、さ
らに必要に応じて頂部鏡板部１３、底部１５及び
胴部１６に棧体１７，１７′，１７″…を設けて構
成したものである。そして、前記環状の枠体１
４，１４′，１４″…及び棧体１７，１７′，１
７″…はいずれも前記した如く、耐圧縮性で低熱
伝導度の連続開気孔構造を有する無機質材料たと
えばケイ酸カルシウム、石膏、セラミツクフオー
ム等の成形体よりなつている。そして前記枠体１
４，１４′，１４″…および棧体１７，１７′，１
７″…で仕切られた空間１８，１８′，１８″，１
８…には熱伝導度の低い前記粉体状あるいは繊
維状の断熱材５が緊密に充填され、かつ、外槽１
１及び内槽１２の間が10-2Torr以下の真空度に
保持されて円筒状の断熱容器が形成されている。
さらに第３図は、上部を開口した角型の断熱容
器１００の実施態様を説明するもので、容器は側
壁断熱層１０１ａ，１０１ｂ，１０１ｃ，１０１
ｄ及び底部断熱層１０２よりなり、それぞれの断
熱層の外壁１０３、内壁１０４の間には各側壁の
断熱層１０１ａ，１０１ｂ，１０１ｃ，１０１ｄ
及び底部断熱層１０２の形状に合せて、その縁端
周辺に沿つて耐圧縮性、低熱伝導度の連続開気孔
構造を有する無機質材料よりなる枠体１０５及び
必要に応じて前記枠体１０５で区劃された空間１
０６には前記枠体１０５と同様無機質材料の棧体
１０７が、縦、横あるいは筋交い方向に設けられ
ている。そして前記１０５と棧体１０７とによつ
て区劃された空間１０６，１０６′…には前記し
た如く粉体状あるいは繊維状断熱材５が緊密に充
填され、さらに外壁１０３、内壁１０４間は
10-2Torr以下の真空度に排気されて保持されて
いる。
本発明は以上三つの実施様態で述べたように、
形成すべき断熱層の内外壁の間に、断熱層の形状
に合せて、その縁端周辺に沿つてケイ酸カルシウ
ム、石膏、セラミツクフオームの如き無機質材料
の枠体あるいは棧体からなる補強枠体を設けたの
で、目的とする真空断熱層のため真空排気しても
形状が変形したり崩れたりすることがなく、しか
も内外壁が真空荷重を受けても充分耐え得るの
で、内外壁の材料が薄板材料にすることが可能と
なり、真空断熱構造体全体を軽量化することがで
きる。また、断熱性能に秀れているものの、従来
真空断熱のために使用するには壁材を厚肉として
しまうので支持材に使用し得なかつた、パーライ
ト、シラスバルーン、ガラスバルーン等の粉体状
断熱材、あるいはガラスバルーン、シリカアルミ
ナウール、シリカーウール、カーボンウール等の
繊維状断熱材を、上記無機質材料を補強枠体に設
けたことにより内外壁を薄肉に維持しつつ使用し
得たため、軽量で断熱性能の秀れた真空断熱構造
体を得ることができる。さらに、真空排気時にお
いて粉体状断熱材あるいは繊維状断熱材が吸引さ
れて排気操作を阻害するという問題を、補強枠体
として設けた連続開気孔構造を有する無機質材料
を利用しこれを介して吸引排気することにより、
該無機質材料をフイルターとして作用せしめこと
によつて解決することができる。
なお前記粉体状断熱材あるいは繊維状断熱材に
適宜輻射熱の反射材としてアルミニウ片、アルミ
ニウ粉を混合したり、又真空保持のため吸着材、
ゲータ材を混合して使用することは勿論可能であ
る。
（実験例）
次表は本発明の真空断熱層(A)と、パーライト粉
末を充填した真空断熱層(B)と、ケイ酸カルシウム
成形体を支持材として全面に装填した真空断熱層
(C)との性能を比較して表示したものである。
なお、それぞれの断熱層内の真空度は
10-3Torr、外壁、内壁間の温度差は20℃と−20
℃の間の40℃である。
"Industrial Application Field" The present invention relates to a vacuum insulation structure that is lightweight and has excellent insulation performance. "Prior Art" It is well known that in general, in structures that require insulation, such as refrigerated containers and liquefied gas storage tanks, the insulation walls are made of vacuum structures in order to improve the insulation performance.
However, when forming an insulating wall in a vacuum structure,
A vacuum load is applied to the inner and outer walls forming the vacuum structure, and therefore, thick wall materials are used for the wall material to sufficiently withstand the vacuum load. However, using thick-walled materials as wall materials not only increases the weight and requires an extremely large amount of labor for processing, but also has the drawback that the thick-walled materials increase heat intrusion, especially in insulation layers with openings. . For this reason, various vacuum insulation structures have been developed in which thin-walled materials can be used as wall materials. This type of vacuum insulation structure receives a vacuum load between the inner and outer walls, so it is loaded with compression-resistant molded insulation material as a support material, but those that satisfy compression resistance generally have a bulk specific gravity. As a result, such a heat insulating material has a high thermal conductivity, which poses a problem in terms of heat insulation performance. In view of the above-mentioned current situation, the applicant of the present invention previously proposed the use of an inorganic material molded body having a continuous open pore structure such as calcium silicate, which has compression resistance and low thermal conductivity, as a support material. (Special application 1972-43061
For example, in addition to the above-mentioned calcium silicate, such molded bodies include ceramic foam, plaster, etc., which have a continuous open pore structure, and these molded bodies have a compressive load resistance of 2 kg/cm 3 or more. Moreover, the thermal conductivity is 0.01 kcal/mh°C or less under vacuum, and since it has a continuous open pore structure, the evacuation effect is remarkable. "Problems to be Solved by the Invention" However, even when the inorganic material is used as a support material, in order to function as a support material, the inorganic material support material is in close contact with the inner and outer walls forming the heat insulating layer. Since the structure is fixed using a metal support, it is impossible to avoid heat intrusion that is conducted through the inorganic material used as the support material. Therefore, it is preferable to use a material with as low thermal conductivity as possible as the material used as the support material. Insulating materials with low thermal conductivity include powders such as perlite, shirasu balloons, and glass balloons (thermal conductivity in a vacuum of 10 -2 Torr or less).
0.002kcal/mh℃, but 0.02kcal/mh under normal pressure
mh℃, ), fibrous materials such as glass wool, silica alumina wool, silica wool, carbon wool (thermal conductivity under vacuum of 10 -2 Torr or less)
0.003kcal/mh℃, but 0.03kcal/mh under normal pressure
mh℃, ), but as mentioned above, these cannot bear compressive loads, so if these insulation materials are used in a vacuum, thick wall materials must be used as the wall material, as mentioned above. is required, which inevitably increases the weight. Moreover, when the inside of the insulation layer using the powder or fibrous insulation material is evacuated,
A new problem arises in that the powder and fibrous heat insulating material is sucked in and obstructs the evacuation operation. In view of the current situation as described above, the present invention aims to provide an easy-to-manufacture vacuum insulation structure that is lightweight, can withstand compressive loads, has excellent insulation performance, and allows vacuum evacuation operations to be performed without any trouble. It is something. "Means for Solving the Problem" In the vacuum insulation structure of the present invention, between the inner and outer walls forming the vacuum insulation structure, there is a continuous wall along the edges of the inner and outer walls in accordance with the shape of the inner and outer walls. A reinforcing frame body made of an inorganic material having an open pore structure and functioning as a filter during evacuation is closely fixed to the inner and outer walls, and a powder heat insulating material or a fibrous heat insulating material is tightly attached to the other spaces. The solution to the above problem was to fill the space between the inner and outer walls to maintain a vacuum. "Function" According to the vacuum insulation structure of the present invention, since the reinforcing frame body made of an inorganic material having a continuous open pore structure is provided, the shape will not be deformed even if the vacuum is evacuated to form the desired vacuum insulation layer. Since the inner and outer walls do not collapse or collapse, and the inner and outer walls can sufficiently withstand vacuum loads, it is possible to use a thin plate material for the inner and outer walls. In addition, since the inner and outer walls can sufficiently withstand vacuum loads, it is possible to keep the inner and outer walls thin and fill them with powder or fibrous heat insulating material, which has a lower thermal conductivity than the above-mentioned inorganic materials. Therefore, it is possible to further improve the heat insulation performance. Furthermore, a reinforcing frame made of inorganic material that functions as a filter during evacuation is arranged, so that by performing suction and exhaust operations through the reinforcing frame, the powdered heat insulating material obstructs the evacuation operation during evacuation. This problem can be solved. "Example" The vacuum thermal structure of the present invention will be explained below with reference to the drawings. FIG. 1 shows an embodiment in which the vacuum insulation structure of the present invention is formed into a plate shape, 1a, 1a, 1c,
1d, 1e, and 1f are wall materials made of thin metal plates with low thermal conductivity such as aluminum or stainless steel, and 2 is made of calcium silicate, gypsum, ceramic foam, etc. with a continuous open pore structure and is resistant to compression (at least compressive load 2 kg). /cm 2 ) Low thermal conductivity (0.01kcal/mh℃ under vacuum of 10 -2 Torr or less, but under normal pressure,
A supporting frame body made of an inorganic material with a temperature of 0.033 kcal/mh℃), and the frame body 2 is constructed along the four edges of the frame body in accordance with the shape of the plate-shaped vacuum structure to be formed. The wall materials 1a and 1b are configured to be in close contact with each other. Reference numeral 3 denotes a rod body provided in the space 4 formed by the support frame 2, so as to traverse the space 4 in the vertical and horizontal directions or in the bracing direction as appropriate depending on the width of the space 4; Like body 2, it is made of inorganic materials such as calcium silicate, gypsum, and ceramic foam. Reference numeral 5 denotes a powder heat insulating material or a fibrous heat insulating material filled in the spaces 4 and 4' partitioned by the frame body 2 and the rod body 3. These insulation materials include powder insulation materials.
Perlite, shirasu balloons, glass balloons, etc. are preferred in terms of their thermal conductivity, and as fibrous heat insulating materials, glass wool, silica alumina wool, silica wool, carbon wool, etc. are similarly preferred. After arranging the frame 2, the rod 3, and the powder heat insulating material or the fibrous heat insulating material between the wall materials 1a and 1b, respectively, the side wall materials 1c, 1d, 1e, and 1f are placed along the frame 2. The wall materials 1a and 1b are welded and sealed except for the vacuum exhaust hole 6, and after evacuation, the exhaust port 6 is sealed to maintain a vacuum level of at least 10 -2 Torr or less inside to form a plate-like vacuum. It shall be an insulated structure. Figure 2 shows a cylindrical heat insulating container to which the vacuum heat insulating structure structure of the present invention is applied, where 11 is an outer tank, 12 is an outer tank, and 12 is an outer tank.
is the inner tank, and the outer tank 11 and the inner tank 12 of the top mirror plate part 13
An annular frame 14 is placed between them along the edge circumferential direction, an annular frame 14' is placed between the outer tank 11 of the bottom part 15, an annular frame 14' along the edge circumferential direction between the inner tanks 12, and an outer tank 11 of the body part 16. , an appropriate number of annular frames 14'' are fixedly installed between the inner tank 12 in close contact with the outer tank 11 and the inner tank 12, respectively, and are further attached to the top mirror plate 13, bottom 15 and body 16 as necessary. It is constructed by providing rod bodies 17, 17', 17''... And the annular frame 1
4, 14', 14''...and rod bodies 17, 17', 1
As described above, each of 7'' is made of a molded body of an inorganic material such as calcium silicate, gypsum, ceramic foam, etc., which has a continuous open pore structure that is resistant to compression and has low thermal conductivity.
4, 14', 14''...and rod bodies 17, 17', 1
Space 18, 18', 18'', 1 divided by 7''...
8 is tightly filled with the powder or fibrous heat insulating material 5 having low thermal conductivity, and the outer tank 1 is
A cylindrical heat-insulating container is formed by maintaining a vacuum of 10 -2 Torr or less between the inner tank 1 and the inner tank 12 . Furthermore, FIG. 3 explains an embodiment of a square heat insulating container 100 with an open top, and the container has side wall heat insulating layers 101a, 101b, 101c, 101.
d and a bottom heat insulating layer 102, and between the outer wall 103 and inner wall 104 of each heat insulating layer, there are heat insulating layers 101a, 101b, 101c, and 101d on each side wall.
In accordance with the shape of the bottom heat insulating layer 102, a frame body 105 made of an inorganic material having a continuous open pore structure with compression resistance and low thermal conductivity is formed along the periphery of the bottom heat insulating layer 102, and if necessary, the frame body 105 is separated. Destroyed space 1
06 is provided with a rod body 107 made of an inorganic material like the frame body 105 in the vertical, horizontal or intersecting directions. The spaces 106, 106' separated by the 105 and the rod 107 are tightly filled with the powder or fibrous heat insulating material 5 as described above, and the space between the outer wall 103 and the inner wall 104 is
It is evacuated and maintained at a vacuum level of 10 -2 Torr or less. As described in the above three embodiments, the present invention
A reinforcing frame made of an inorganic material such as calcium silicate, gypsum, or ceramic foam is placed between the inner and outer walls of the heat insulating layer to be formed, along its edges in accordance with the shape of the heat insulating layer. Because of the vacuum insulation layer, the shape will not deform or collapse even if the vacuum is evacuated, and the inner and outer walls can withstand vacuum loads sufficiently, so the material of the inner and outer walls can be It becomes possible to use a thin plate material, and the weight of the entire vacuum insulation structure can be reduced. In addition, powdered materials such as perlite, shirasu balloons, and glass balloons, which have excellent insulation performance but could not be used as supporting materials because the wall materials used for vacuum insulation would have to be thick. The insulating material or fibrous insulating material such as glass balloon, silica alumina wool, silica wool, carbon wool, etc. can be used while keeping the inner and outer walls thin by providing the above-mentioned inorganic material in the reinforcing frame, making it lightweight. A vacuum insulation structure with excellent insulation performance can be obtained. Furthermore, we solved the problem of powder or fibrous heat insulating material being sucked in during vacuum evacuation and obstructing the evacuation operation by using an inorganic material with a continuous open pore structure provided as a reinforcing frame. By suctioning and exhausting,
This problem can be solved by making the inorganic material act as a filter. In addition, aluminum pieces or aluminum powder may be mixed with the powdered heat insulating material or fibrous heat insulating material as a radiant heat reflecting material, or an adsorbent or an adsorbent may be used to maintain the vacuum.
It is of course possible to use a mixture of gator materials. (Experiment example) The following table shows the vacuum insulation layer (A) of the present invention, the vacuum insulation layer (B) filled with pearlite powder, and the vacuum insulation layer fully loaded with calcium silicate molded bodies as a support material.
This is a comparison of performance with (C). The degree of vacuum within each insulation layer is
10 -3 Torr, temperature difference between outer wall and inner wall is 20℃ and −20℃
It is between 40℃ and 40℃.
【表】
上表の如く本発明の真空断熱構造体(A)は、真空
断熱層(B)と同等の断熱性能を有するばかりでな
く、該断熱層(B)に比して軽量であり、また真空断
熱層(C)に比してより良好な熱伝導性を示すことが
確認された。
「発明の効果」
以上説明したように、本発明の真空断熱構造体
は、該真空断熱構造体を形成する内外壁の間に、
内外壁の形状に合せて内外壁の縁端周辺に沿つて
連続開気孔構造を有する無機質材料からなり真空
排気時にフイルターとして機能する補強枠体をそ
れぞれ前記内外壁に密着して固定すると共に、前
記以外の空間に粉体状断熱材あるいは繊維状断熱
材を緊密に充填して、前記内外壁間を真空に保持
したものであるから、補強枠体を設けたことによ
り目的とする真空断熱層を形成するため真空排気
しても形状が変形したり崩れたりすることがな
く、しかも内外壁が真空荷重を受けても充分耐え
得るので、内外壁の材料を薄板材料にすることが
可能となり、真空断熱構造体全体を軽量化するこ
とができる。
また、内外壁が真空荷重を受けても充分耐え得
るので、内外壁の材料を薄肉に維持しつつ上記無
機質材料より熱伝導度の低い粉体状断熱材あるい
は繊維状断熱材を充填使用し得たため、断熱性能
のより一層の向上を図ることができる。
さらに、無機質材料からなり真空排気時にフイ
ルターとして機能する補強枠体を配したので、該
補強枠体を介して吸引排気操作を行うことによ
り、真空排気時において粉体状断熱材が排気操作
を阻害するという問題を解消することができ、よ
つて真空排気操作を簡略化することができる。[Table] As shown in the table above, the vacuum insulation structure (A) of the present invention not only has the same insulation performance as the vacuum insulation layer (B), but is also lighter than the insulation layer (B). It was also confirmed that it exhibited better thermal conductivity than the vacuum insulation layer (C). "Effects of the Invention" As explained above, the vacuum insulation structure of the present invention has a
A reinforcing frame body made of an inorganic material having a continuous open pore structure along the edges of the inner and outer walls in accordance with the shape of the inner and outer walls, and functioning as a filter during evacuation, is fixed in close contact with the inner and outer walls, respectively. Since the space other than the above is tightly filled with powder heat insulating material or fibrous heat insulating material to maintain a vacuum between the inner and outer walls, the provision of the reinforcing frame makes it possible to create the desired vacuum heat insulating layer. Because of this, the shape does not deform or collapse even when evacuated, and the inner and outer walls can withstand vacuum loads, making it possible to use thin plate materials for the inner and outer walls. The weight of the entire heat insulating structure can be reduced. In addition, since the inner and outer walls can sufficiently withstand vacuum loads, it is possible to fill the inner and outer walls with powder or fibrous heat insulating material, which has a lower thermal conductivity than the above-mentioned inorganic materials, while keeping the material of the inner and outer walls thin. Therefore, it is possible to further improve the heat insulation performance. Furthermore, a reinforcing frame made of inorganic material that functions as a filter during evacuation is arranged, so that by performing suction and exhaust operations through the reinforcing frame, the powdered heat insulating material obstructs the evacuation operation during evacuation. This problem can be solved, and the evacuation operation can be simplified.
第１図は本発明の真空断熱構造体の一実施態様
である板状断熱構造体を説明する一部切開斜視
図、第２図は本発明の真空断熱構造体の別の実施
態様である円筒状断熱容器の一部切開図、第３図
は本発明の真空断熱構造体のさらに別の実施態様
である角型断熱容器の一部切開斜視図である。
１ａ，１ｂ，１ｃ，１ｄ，１ｅ，１ｆ……壁
材、２……支持用枠体、３……棧体、４，４′…
…空間、５……断熱材、６……排気孔、１１……
外槽、１２……内槽、１３……鏡板部、１４……
枠体、１５……底部、１６……胴部、１７，１
７′，１７″……棧体、１８，１８′，１８″，１８
……空間、１００……断熱容器、１０１ａ，１
０１ｂ，１０１ｃ，１０１ｄ……側壁断熱層、１
０２……底部断熱層、１０３……外壁、１０４…
…内壁、１０５……枠体、１０６，１０６′……
空間、１０７……棧体。
FIG. 1 is a partially cutaway perspective view illustrating a plate-shaped heat insulating structure which is one embodiment of the vacuum heat insulating structure of the present invention, and FIG. 2 is a cylindrical shape which is another embodiment of the vacuum heat insulating structure of the present invention. FIG. 3 is a partially cutaway perspective view of a rectangular heat insulating container which is still another embodiment of the vacuum heat insulating structure of the present invention. 1a, 1b, 1c, 1d, 1e, 1f...Wall material, 2...Supporting frame, 3...Ram body, 4, 4'...
...Space, 5...Insulation material, 6...Exhaust hole, 11...
Outer tank, 12...Inner tank, 13...End plate part, 14...
Frame, 15...bottom, 16...body, 17,1
7', 17''... body, 18, 18', 18'', 18
...Space, 100...Insulated container, 101a, 1
01b, 101c, 101d...Side wall heat insulation layer, 1
02...Bottom insulation layer, 103...Outer wall, 104...
...Inner wall, 105...Frame body, 106, 106'...
Space, 107...body.
Claims (1)
空断熱構造体において、該真空断熱構造体を形成
する内外壁の間に、内外壁の形状に合せて内外壁
の縁端周辺に沿つて連続開気孔構造を有する無機
質材料からなり真空排気時にフイルターとして機
能する補強枠体をそれぞれ前記内外壁に密着して
固定すると共に、前記以外の空間に粉体状断熱材
あるいは繊維状断熱材を緊密に充填して、前記内
外壁間を真空に保持したことを特徴とする真空断
熱構造体。 ２ 前記無機質材料が、ケイ酸カルシウム、石
膏、セラミツクフオームであることを特徴とする
特許請求の範囲第１項記載の真空断熱構造体。 ３ 前記粉体状断熱材がパーライト、シラス、シ
ラスバルーン、ガラスバルーンであることを特徴
とする特許請求の範囲第１項あるいは第２項記載
の真空断熱構造体。[Scope of Claims] 1. In a vacuum insulation structure in which a vacuum is maintained by evacuating the space between the inner and outer walls, there is provided a structure between the inner and outer walls forming the vacuum insulation structure, according to the shape of the inner and outer walls. A reinforcing frame made of an inorganic material having a continuous open pore structure along the edges and functioning as a filter during evacuation is fixed tightly to the inner and outer walls, and a powder heat insulating material or A vacuum insulation structure characterized in that a fibrous insulation material is tightly packed to maintain a vacuum between the inner and outer walls. 2. The vacuum insulation structure according to claim 1, wherein the inorganic material is calcium silicate, gypsum, or ceramic foam. 3. The vacuum heat insulating structure according to claim 1 or 2, wherein the powder heat insulating material is pearlite, shirasu, shirasu balloon, or glass balloon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2955480A JPS56127889A (en) | 1980-03-08 | 1980-03-08 | Vacuumed heat insulation structure body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2955480A JPS56127889A (en) | 1980-03-08 | 1980-03-08 | Vacuumed heat insulation structure body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56127889A JPS56127889A (en) | 1981-10-06 |
| JPS6346319B2 true JPS6346319B2 (en) | 1988-09-14 |
Family
ID=12279355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2955480A Granted JPS56127889A (en) | 1980-03-08 | 1980-03-08 | Vacuumed heat insulation structure body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56127889A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010242975A (en) * | 2010-07-13 | 2010-10-28 | Toshiba Home Technology Corp | Insulating material and its manufacturing method |
| JP2010261501A (en) * | 2009-05-07 | 2010-11-18 | Panasonic Corp | Vacuum insulation box |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149496A (en) * | 1982-02-26 | 1983-09-05 | 松下冷機株式会社 | Powder vacuum heat insulating material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5187853A (en) * | 1975-01-30 | 1976-07-31 | Mitsubishi Electric Corp | DANNET SUZAIRYO |
| JPS5428054A (en) * | 1977-08-04 | 1979-03-02 | Takeshi Tooyama | Insulating element |
-
1980
- 1980-03-08 JP JP2955480A patent/JPS56127889A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261501A (en) * | 2009-05-07 | 2010-11-18 | Panasonic Corp | Vacuum insulation box |
| JP2010242975A (en) * | 2010-07-13 | 2010-10-28 | Toshiba Home Technology Corp | Insulating material and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56127889A (en) | 1981-10-06 |
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