JP3455251B2 - Vacuum insulation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature container,
Cooler, leisure cooler or transfer cryogenic fluid
Attached to conduits and other plant equipment for heat insulation
The present invention relates to a vacuum insulation material to be applied. [0002] 2. Description of the Related Art Cryogenic containers, refrigerators, leisure coolers
Or a conduit for transferring cryogenic fluid or other plant
Various types of insulation materials have been used as insulation materials for equipment.
In recent years, it has been used as a heat insulating material with particularly excellent heat insulating performance.
The heat-insulating core material inside the exterior that forms an airtight chamber inside.
Vacuum insulation is used to fill and evacuate the airtight chamber
Have been. The exterior body used for this
It is necessary to have a function to hold under vacuum for a long time.
Excellent gas barrier properties to prevent gas intrusion from the part
Must be Therefore, conventionally,
In order to have this gas barrier property,
-Aluminum deposition with an aluminum deposition layer as the layer
Film or metal aluminum foil film is used
Was. [0003] SUMMARY OF THE INVENTION
Although the film has excellent gas barrier properties,
Since it contains a large aluminum layer, an exterior body using this
Has high thermal conductivity, and the vacuum
Heat material easily leaks heat through the exterior in the thickness direction
Problem. The problem is the metal aluminum foil fill
(Thickness of aluminum is 7 to 20μ).
Aluminum deposition film with relatively small problems (aluminum
When using a thickness of 200 to 800 mm), use vacuum insulation
This was a problem when the panel size was small. [0004] Accordingly, an object of the present invention is to lengthen the interior of the exterior body.
It can be kept under vacuum for a period and heat conduction by the outer package
Another object of the present invention is to provide a vacuum heat insulating material which can reduce the size of the vacuum heat insulating material. [0005] [MEANS FOR SOLVING THE PROBLEMS] To achieve this object
The characteristic configuration of the vacuum insulation material according to the present invention is that an airtight chamber is provided inside.
The heat-insulating core material is filled in the exterior body that forms
In vacuum insulation material that has been evacuated,Insulating core material
It is rectangular in plan view, and one of the rectangular heat insulating core materials
The exterior body on the surface,Gas for vacuum maintenance in an airtight room
As a barrier layerTransparentGlass deposited film layerWith the other
Aluminum cladding on the surface as a gas barrier layer
Film or aluminum foil film
Or a discoloration type detector that changes color due to the presence of water vapor,
Between the exterior body and the heat insulating core material on the glass deposited film layer side
InterposedThe operation and effects are as follows
It is. [0006] [Function] That is, in the vacuum heat insulating material of the present invention, the exterior body
The gas barrier function to be provided for the
Is fulfilled by This film is made of silicon oxide (SiO
_x) As the main component, so the thermal conductivity is higher than aluminum
Is significantly smaller (aluminum: λ ≒ 200 kcal /
mhdeg, SiO_TwoGlass: λ: 1 kcal / mh
deg), to form an exterior body using this as a gas barrier layer.
The vacuum insulation material created from the
This is a very good heat insulating material. In addition,
Barrier performance due to oxidation compared to Luminium
Gas is unlikely to occur, and the gas
Barrier performance can be maintained. [0007] Therefore, the inside of the exterior body is kept under vacuum for a long time.
And heat conduction by the outer package can be reduced.
Vacuum insulating material was obtained. In addition, glass deposition
Since the film layer can be formed transparent,
Unlike a wearing film or an aluminum foil film,
To observe internal conditions, for example, oxygen and water vapor.
Insulation of the discoloration type detector that discolors due to the presence of air
If it is located between the conductive core material and the exterior,
Vacuum condition, that is, the performance of vacuum insulation material
Easy to check. [0008] An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of the vacuum heat insulating material 1, and FIG.
A plan view of the material 1 is shown. As shown in the sectional view, the book
The vacuum insulation material 1 of the application is an exterior body 3 forming an airtight chamber 2 inside.
Is filled with a heat insulating core material 4 and the airtight chamber 2 is evacuated.
It is configured. Here, in the illustrated example,
The thermal core material 4 has a trapezoidal longitudinal section and is formed in a square shape in plan view
Have been. And in the production of insulation,
A pair of upper and lower sheet-shaped core housing films constituting the body 3
5, the above-mentioned heat-insulating core material 4 is interposed between the core accommodation films 5.
In a vacuum vessel (not shown) that can be stored and heated,
After evacuating the inside of the core housing film 5, a pair of cores
A) Opening 6 formed around the four sides of accommodation film 5
By sealing and sealing, it is formed as a surplus portion 7. here
Then, the core containing film 5 described above, as shown in FIG.
From the inner layer side, a fusion bonding film layer 5a, a glass deposition film
Layer 5b, and further a protective film layer 5c forming the outermost layer
It is provided with. Innermost fusion bonding film layer 5
a is fused at the extra length 7 of the end mold. one
On the other hand, a core containing film which is the heat insulating core material 4 and the outer package 3
5, a detecting body 8 described below for detecting an internal situation is interposed.
Is equipped. The heat insulating core material 4 may be silica or parlor.
Compacts made of powders such as
Lucium molded body, open-cell urethane foam, pheno
Tool form is used. Fused film layer 5a
PE (polyethylene) film, PP (polypropylene)
Pyrene) film or the like is used. Glass deposited film
The layer 5b is made of SiO_xGlass-like transparent steam mainly composed of
It consists of a film with an adhesion layer,
Very good as Lumi deposited film. here
The thickness of the deposited layer is preferably in the range of 200 to 800 °.
In addition, as a base film material on which glass deposition is performed, P
ET (polyester), polypropylene, nylon filler
Lum or the like is employed, but a PET film is preferred.
Further, as the protective film 5c, a PET film,
A nylon film or the like is used. The sensing element 8 will be described.
When the vacuum state of the heat material 1 is broken,
For intrusion into the airtight chamber 2 formed inside the exterior bodyAccording
This is detected by discoloration. That is, oxygen
Oxygen detectors (for example, organic
Compounds that use compounds that change color by oxidation
Product name Secur K (Nippon Soda Co., Ltd.), or
A water vapor detector that changes color depending on the presence or absence of water vapor
For example, a silica gel-based adsorbent). In addition,
An example of such a thing is when outside air enters an airtight room.
May cause deformation such as bending and melting.
No. [Another embodiment] Hereinafter, another embodiment of the present application will be described.
Will be explained. (A) In the above embodiment, the gas barrier layer
The glass-deposited film layer 5b on the upper and lower surfaces of the exterior body 3.
In general, these vacuum insulation materials 1 generate heat.
The purpose is to prevent flow in the thickness direction.
A glass-deposited film layer 5b is provided on one side of the package 3
One of them may be used depending on the conditions of use.
-Layer, aluminum deposited film or aluminum foil film
Lum may be used. (B) Further, in the above embodiment, the heat insulating core material
4, the cross section is trapezoidal and the plane is square
However, these shapes are arbitrary, and the exterior body
3 also has a cylindrical shape with both ends open,
Arbitrary, such as a bottomed cylinder. (C) Further, in the above embodiment, a pair of upper and lower
(A) shows an example in which an exterior body is constituted by the accommodation film 5
However, the number of divisions and shape of the film can be arbitrarily selected.
You. (D) Further, a pair of core housings forming the exterior body 3
At least one of the lum 5 and the outer surface of the vacuum heat insulating material 1.
Laminated on the synthetic resin container 9 to be formed
It is also possible to configure. That is, in the example shown in FIG.
The outside of the glass-deposited film layer 5b.
A vessel 9 is provided, and the container 9 provides the vacuum heat insulating material 1.
Shape can be reliably maintained. The synthetic resin used here
, Vinyl chloride, polyethylene terephthalate (PE
T) Polyamide, polyolefin and the like. this
In some cases, the lid side of the container or the container side
Glass deposited film depending on usage conditions
May be used as a gas barrier layer. In addition, the lid material side
Using synthetic resin sheet (0.5-3mm thickness) for reinforcement
You may. It should be noted that the claims are in contrast to the drawings.
Signs are provided for convenience.
It is not limited to the configuration of the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a vacuum insulating material. FIG. 2 is a plan view of a vacuum insulating material. FIG. 3 is a longitudinal sectional view of another embodiment having a synthetic resin container. ] 1 vacuum heat insulator 2 airtight chamber 3 exterior body 4 heat-insulating core material 5 core accommodating fill Program 8 sensing elements

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 59/00-59/22 B32B 1/06 F25D 23/06

Claims (1)

(57) [Claim 1] A heat insulating core material (4) is filled in an exterior body (3) forming an airtight chamber (2) therein, and the airtight chamber (2) is evacuated. An evacuated vacuum insulation (1),
The heat insulating core material (4) is rectangular in plan view,
The exterior body on one surface of a heat-insulating core material (4) in the shape of
(3) includes a transparent glass-deposited film layer as a gas barrier layer for maintaining a vacuum in the hermetic chamber (2) ;
The exterior body (3) on the surface is in contact with the gas barrier layer.
Equipped with an aluminum evaporated film or aluminum foil film
Change in color due to the presence of oxygen or water vapor
The color type detector (8) is provided on the exterior of the glass-deposited film layer side.
Interposed between the body (3) and the heat insulating core material (4)
There is vacuum insulation.