JPH04184074A - Vacuum heat insulating body - Google Patents

Vacuum heat insulating body

Info

Publication number
JPH04184074A
JPH04184074A JP2310563A JP31056390A JPH04184074A JP H04184074 A JPH04184074 A JP H04184074A JP 2310563 A JP2310563 A JP 2310563A JP 31056390 A JP31056390 A JP 31056390A JP H04184074 A JPH04184074 A JP H04184074A
Authority
JP
Japan
Prior art keywords
wrapping material
outer wrapping
bellows
heat
peripheral part
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.)
Granted
Application number
JP2310563A
Other languages
Japanese (ja)
Other versions
JP2564035B2 (en
Inventor
Yasuyoshi Gotou
泰芳 後藤
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.)
Sharp Corp
Original Assignee
Sharp Corp
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
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2310563A priority Critical patent/JP2564035B2/en
Publication of JPH04184074A publication Critical patent/JPH04184074A/en
Application granted granted Critical
Publication of JP2564035B2 publication Critical patent/JP2564035B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Refrigerator Housings (AREA)

Abstract

PURPOSE:To provide a vacuum heat insulating body capable of reducing a heat transfer amount through solid conduction of an outer wrapping material by a method wherein the outer wrapping material is provided at a peripheral part with a bellows part in a waveform in cross section. CONSTITUTION:An outer wrapping material 10 is produced such that a polyethylene film 3 with a thickness of 40-70mum for heat seal and a metallic foil 4 formed of an aluminum to suppress an amount of permeating gas are adhered and laminated together on the back side and the surface side of a polyethylene terephthalate film 2 with a thickness of 20-30mum where aluminum is deposited approximate hundreds of Angstrom thick. A peripheral part 22 of the outer wrapping material 10 is forcibly formed in a waveform in cross section, i.e., the shape of a bellows, to form a bellows part 23. Since, as noted above, the peripheral part 22 of the outer wrapping material 10 has the bellows part 23, the length in the direction of a heat flow of the peripheral part 22 is increased to a value longer than the length of the peripheral part of a conventional outer wrapping material having no bellows part, and a heat transfer amount is decreased according to the increase of the length. As noted above, a vacuum heat insulating body 21 can reduce a heat transfer amount of the outer wrapping material 10, resulting in improvement of heat insulating performance.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

この発明は、冷蔵庫、冷凍ショーケース、携帯用冷温蔵
庫等の断熱体として利用する真空断熱体に関するもので
ある。
The present invention relates to a vacuum heat insulating body used as a heat insulating body for refrigerators, freezer showcases, portable cold storages, etc.

【従来の技術】[Conventional technology]

第3図は従来の真空断熱体である真空断熱パネル1を示
している。第3図において、10は外包材であり、この
外包材10はアルミ蒸着をしたポリエチレンテレフタレ
ート2の両側に、熱融着するためのポリエチレン3と気
体透過を抑制するアルミ箔4を積層してなる。この外包
材10に通気性を有する図示しない内袋に充填されたス
ペーサ材としてのパーライトの粉末8を挿入して、内部
を0.ITorr程度に減圧した後、外包材10の袋の
開口部を熱融着により封止している。 第4図はいま一つの従来の真空断熱体12を示している
。13は溶接可能な比較的薄い外包材としての金属容器
であり、この容器13内にスペーサ材としての無機質粉
末14を挿入し、容器13内を0.1Torr程度の圧
力にし、フタ19をして溶接部15により密閉ンールし
ている。
FIG. 3 shows a vacuum insulation panel 1 which is a conventional vacuum insulation body. In FIG. 3, 10 is an outer packaging material, and this outer packaging material 10 is made by laminating polyethylene 3 for heat-sealing and aluminum foil 4 for suppressing gas permeation on both sides of polyethylene terephthalate 2 coated with aluminum vapor deposition. . Perlite powder 8 as a spacer material filled in an air permeable inner bag (not shown) is inserted into this outer packaging material 10 to make the inside 0. After the pressure is reduced to approximately ITorr, the opening of the bag of the outer packaging material 10 is sealed by heat sealing. FIG. 4 shows another conventional vacuum insulator 12. As shown in FIG. Reference numeral 13 denotes a metal container as a relatively thin outer packaging material that can be welded.Inorganic powder 14 as a spacer material is inserted into the container 13, the pressure inside the container 13 is set to about 0.1 Torr, and the lid 19 is closed. The welded portion 15 provides a hermetically sealed seal.

【発明が解決しようとする課題】[Problem to be solved by the invention]

しかしながら、上記2つの従来例においては、真空断熱
体の外包材10.13であるところのアルミ箔4、ポリ
エチレンテレフタレート2、ポリエチレン3及び金属容
器13を通して固体伝導により必然的に熱が伝わり、真
空断熱体の断熱特性を著しく悪化している。 そこで、本発明の目的は、外包材における固体伝導によ
る伝熱量を小さくできる真空断熱体を提供することであ
る。
However, in the above two conventional examples, heat is inevitably transmitted by solid conduction through the aluminum foil 4, polyethylene terephthalate 2, polyethylene 3, and metal container 13, which are the outer packaging materials 10 and 13 of the vacuum insulation body, and the vacuum insulation Significantly deteriorates the body's insulation properties. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vacuum heat insulating body that can reduce the amount of heat transferred by solid conduction in an outer packaging material.

【課題を解決するだめの手段】[Means to solve the problem]

熱伝導に関するフーリエ方程式によって示されているよ
うに、2つの平行な面間ての伝熱量は、熱伝導率、伝熱
面積および温度差に比例し、面間距離(伝熱距離)に反
比例する。本発明は上記目的を達成するために、この「
伝熱量は伝熱距離に反比例するコという法則を利用した
しのであり、スペーサ材を外包材で包み、上記外包材の
内側を真空にして密封してなる真空断熱体において、上
記外包材は周辺部に断面波形の蛇腹部を有することを特
徴としている。
As shown by the Fourier equation for heat conduction, the amount of heat transferred between two parallel surfaces is proportional to the thermal conductivity, heat transfer area, and temperature difference, and inversely proportional to the distance between the surfaces (heat transfer distance). . In order to achieve the above object, the present invention
This method utilizes the law that the amount of heat transfer is inversely proportional to the distance of heat transfer.In a vacuum insulator made by wrapping a spacer material in an outer wrapping material and sealing it by evacuating the inside of the outer wrapping material, the outer wrapping material is It is characterized by having a bellows section with a corrugated cross section.

【作用】[Effect]

外包材は周辺部に蛇腹部を有するため、熱流方向に対す
る周辺部の長さつまり熱伝達距離か長くなる。この熱伝
達距離に逆比例して伝熱量が小さくなり、真空断熱体の
断熱性能が向上する。
Since the outer packaging material has a bellows portion on the periphery, the length of the periphery in the heat flow direction, that is, the heat transfer distance becomes longer. The amount of heat transfer decreases in inverse proportion to the heat transfer distance, and the heat insulation performance of the vacuum heat insulator improves.

【実施例】【Example】

以下、この発明を図示の実施例により詳細に説明する。 第1図は本発明の一実施例である真空断熱体21を示し
ており、8はスペーサ材、10は外包材賠、上記外包材
10は内部を0.ITorr程度まて減圧した状態でヒ
ート/−ルされている。 上記スペーサ材8は、たとえば、/リカ、バーシュライ
ト、ケイ酸カル7ウム、ケイソウ土等の無機質微粉末か
らなり、図示しない通気性の中袋に包装されている。ま
た、外包材IOは、アルミを数百人程度蒸着した厚さ2
0〜30μmのポリエチレンテレフタレートフィルム2
 (7)JI側ト表側に、厚さ40〜70μmのヒート
シール用のポリエチレンフィルム3と、カス透過量を抑
制するためのたとえばアルミからなる金属箔4をそれぞ
れ接着積層してなる。この外包材10の周辺部22は強
制的に断面波形、すなわち蛇腹形状に形成されて蛇腹部
23を構成している。 このように、本実施例の外包材10の周辺部22は蛇腹
部23を有するために、周辺部22の熱流方向の長さが
、第3図に示した従来の外包材の周辺部よりも長くなり
、それに応して伝熱量か減少する。たとえば、いま、本
実施例の外包材10の周辺部22の熱流方向の長さを従
来の外包材の周辺部のそれの2倍にしたとすると、その
伝熱量は1/2になる。このように、本実施例の真空断
熱体21は外包材10における伝熱量を小さくてきるた
め、断熱性能が同上する。また、蛇腹部23の形状を変
えることにより伝熱量を任意に制御することができる。 なお、上記実施例においてはスペーサ材8として無機質
微粉末を使用したが、連通気泡ウレタン等の成形材を用
いてもよい。この場合には、無機質微粉末の場合と異な
り、通気性中袋は不要となる。 第2図は金属容器による真空断熱体32を示している。 この真空断熱体32の金属容器33の側壁34には、第
1図の真空断熱体21と同様に、断面波形の蛇腹部35
か強制加工されている。金属容器33の内部には第1図
におけるスペーサ材8と同様の無機質微粉末からなるス
ペーサ材14が充填され、容器33の開口部を密閉する
蓋29は容器33に溶接部I5て溶接されている。上記
金属容器33の内部はO,1Torr程度まで真空排気
されている。 この実施例における真空断熱体32の場合にも、容器3
3の周辺部34に蛇腹部35が形成されているので、伝
熱長さを長くして、断熱性能を向上できる。
Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. FIG. 1 shows a vacuum heat insulating body 21 which is an embodiment of the present invention, in which 8 is a spacer material, 10 is an outer packaging material, and the outer packaging material 10 has an inner surface of 0.05 mm. It is heated/cooled under reduced pressure to approximately ITorr. The spacer material 8 is made of inorganic fine powder such as /Rica, vershlite, calcium silicate, diatomaceous earth, etc., and is packaged in a breathable inner bag (not shown). In addition, the outer packaging material IO has a thickness of 2.5 cm, which is made by vapor-depositing several hundred aluminum layers.
0-30μm polyethylene terephthalate film 2
(7) On the front side of the JI side, a polyethylene film 3 for heat sealing with a thickness of 40 to 70 μm and a metal foil 4 made of aluminum, for example, for suppressing the amount of scum permeation are laminated with adhesive. The peripheral portion 22 of the outer packaging material 10 is forcibly formed into a corrugated cross-section, that is, a bellows shape, and forms a bellows portion 23. As described above, since the peripheral part 22 of the outer packaging material 10 of this embodiment has the bellows part 23, the length of the peripheral part 22 in the heat flow direction is longer than the peripheral part of the conventional outer packaging material shown in FIG. length, and the amount of heat transfer decreases accordingly. For example, if the length of the peripheral portion 22 of the outer packaging material 10 of this embodiment in the heat flow direction is twice that of the peripheral portion of the conventional outer packaging material, the amount of heat transfer will be halved. In this way, the vacuum heat insulating body 21 of this embodiment reduces the amount of heat transfer in the outer packaging material 10, so that the heat insulation performance is the same as above. Further, by changing the shape of the bellows portion 23, the amount of heat transfer can be arbitrarily controlled. In the above embodiment, inorganic fine powder was used as the spacer material 8, but a molded material such as open-cell urethane may also be used. In this case, unlike the case of inorganic fine powder, a breathable inner bag is not required. FIG. 2 shows a vacuum insulator 32 made of a metal container. The side wall 34 of the metal container 33 of this vacuum insulator 32 has a bellows portion 35 with a corrugated cross section, similar to the vacuum insulator 21 in FIG.
Or it has been forcibly processed. The inside of the metal container 33 is filled with a spacer material 14 made of inorganic fine powder similar to the spacer material 8 in FIG. There is. The inside of the metal container 33 is evacuated to about 0.1 Torr. Also in the case of the vacuum insulator 32 in this embodiment, the container 3
Since the bellows portion 35 is formed on the peripheral portion 34 of the heat exchanger 3, the heat transfer length can be increased and the heat insulation performance can be improved.

【発明の効果】【Effect of the invention】

以上より明らかなように、この発明の真空断熱体は、そ
の性能に大きく関係する真空度を維持するための外包材
か周辺部に断面波形の蛇腹部を有するので、伝熱長さを
長くすることができ、したがって、伝熱量を減少させて
、断熱性能を向上できる。また、外包材の蛇腹の形を変
えることにより、外包材を伝わる熱量を任意に制御でき
る。
As is clear from the above, the vacuum insulator of the present invention has a bellows section with a corrugated cross section in the outer envelope material or the periphery for maintaining the degree of vacuum, which is greatly related to its performance, so that the heat transfer length can be increased. Therefore, the amount of heat transfer can be reduced and the insulation performance can be improved. Furthermore, by changing the shape of the bellows of the outer wrapping material, the amount of heat transmitted through the outer wrapping material can be arbitrarily controlled.

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

第1図はこの発明の一実施例の真空断熱体の断面図、第
2図はこの発明の他の実施例の断面図、第3,4図は従
来の真空断熱体の断面図である。 、8.14・・・スペーサ材、10・・・外包材、21
.32・真空断熱体、22.35・・・蛇腹部、33・
・金属容器、29・容器の蓋。 特許出願人 シ ャ − プ 株 式 会 社代理 人
弁理士青山 葆 はか1名
FIG. 1 is a sectional view of a vacuum heat insulator according to one embodiment of the present invention, FIG. 2 is a sectional view of another embodiment of the present invention, and FIGS. 3 and 4 are sectional views of a conventional vacuum heat insulator. , 8.14... Spacer material, 10... Outer packaging material, 21
.. 32・Vacuum insulation body, 22.35... Bellows part, 33・
・Metal containers, 29・Container lids. Patent applicant: Sharp Co., Ltd. Company agent: Patent attorney: Haka Aoyama (1 person)

Claims (1)

【特許請求の範囲】[Claims] (1)スペーサ材を外包材で包み、上記外包材の内側を
真空にして密封してなる真空断熱体において、 上記外包材は周辺部に断面波形の蛇腹部を有することを
特徴とする真空断熱体。
(1) A vacuum insulation body formed by wrapping a spacer material in an outer wrapping material and applying a vacuum to the inside of the outer wrapping material to seal it, wherein the outer wrapping material has a bellows section with a corrugated cross section at the periphery. body.
JP2310563A 1990-11-15 1990-11-15 Vacuum insulation Expired - Fee Related JP2564035B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2310563A JP2564035B2 (en) 1990-11-15 1990-11-15 Vacuum insulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2310563A JP2564035B2 (en) 1990-11-15 1990-11-15 Vacuum insulation

Publications (2)

Publication Number Publication Date
JPH04184074A true JPH04184074A (en) 1992-07-01
JP2564035B2 JP2564035B2 (en) 1996-12-18

Family

ID=18006753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2310563A Expired - Fee Related JP2564035B2 (en) 1990-11-15 1990-11-15 Vacuum insulation

Country Status (1)

Country Link
JP (1) JP2564035B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012207682A (en) * 2011-03-29 2012-10-25 Matsuda Gijutsu Kenkyusho:Kk Vacuum heat insulation panel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715193A (en) * 1980-07-02 1982-01-26 Nippon Oxygen Co Ltd Heat insulation pipings for high temperature and high pressure , and its connecting method
JPS62141190U (en) * 1986-02-28 1987-09-05

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715193A (en) * 1980-07-02 1982-01-26 Nippon Oxygen Co Ltd Heat insulation pipings for high temperature and high pressure , and its connecting method
JPS62141190U (en) * 1986-02-28 1987-09-05

Also Published As

Publication number Publication date
JP2564035B2 (en) 1996-12-18

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