JPS6014695A - Vacuum heat-insulating material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a flat vacuum heat insulating material.

[Prior art]

Vacuum insulation materials have high insulation performance, but 5
Due to the pressure-resistant structure of the vacuum container, its application is limited to thermos flasks, tanks, etc. with cylindrical or spherical structures.

However, most of the structures that require heat insulation are flat plates or box-shaped structures that combine flat plates, and in order to configure this as a vacuum heat insulating material, it is necessary to install a spacer inside due to the pressure-resistant structure.

One conventional embodiment will be explained with reference to FIGS. 1 and 2. Since the stainless steel outer plate 52 has five outer plates L welded on both sides to form a flat panel, 3 is a stainless steel corner outer plate; 3 is a vacuum pipe provided on the outer plate 1; 3a is a sealing cut at the tip of the pipe 3; 4B is a porous spacer made of a continuous solid such as lucium silicate. Ru.

This vacuum insulation material is used to create a high vacuum inside the container using spacers 4.
However, the heat conduction loss of the spacer 4 itself is large because the spacer material is a thermal continuum. In other words, even if the spacer 4 has an 80% void, the thermal conductivity property of the two spacers 4 is 1.
However, if a ceramic material such as silica calcium with high thermal conductivity is used as a spacer material, there is no difference from a general heat insulating material such as urethane foam, and it is disadvantageous in that it increases the cost. It is also possible to use a polymer system with low thermal conductivity for the spacer 4, but it is impossible to maintain a high vacuum due to gas generation.

[Purpose of the invention]

The present invention has been made to improve the above defects.

[Summary of the invention]

That is, as a spacer, a glass wool material that has been compressed and densified with an adhesive is used, and the adhesive is vaporized and discharged during vacuum baking of the seal cut mf.

Glass wool is laminated independently in the direction of heat transfer, creating a high vacuum inside and greatly improving insulation ability.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 3 to 6. 5 is glass wool, the fiber direction of which is perpendicular to the heat transfer direction and randomly laminated, and has a low density. . 5a, the glass wool 5 is subjected to vacuum pressure, that is, IK-
It is a glass wool board that has been made highly dense by compressing it by applying adhesive and injecting it with adhesive. In this case, from Figure 3, the fourth
As shown in the figure, it is compressed to several tenths of the size. 6 is a stainless steel outer plate press-molded into a shallow box shape, 7 is a vacuum pipe provided on the outer plate 6, and 7a is a sealing cut at the tip of the pipe 7.

To construct a flat plate-like vacuum insulation material using such members, a high-density glass wool plate 5a is installed inside the outer plate 6, covered with another outer plate 6, and the flange portion is welded. After this, it is placed in a furnace, the pipe 3 is connected to a vacuum pump (not shown), the interior is made into a high-temperature vacuum, the adhesive is thermally decomposed, this gas is discharged, and the tip of the pipe 3 is then sealed. Cut to form vacuum insulation.

This glass wool board 5a of the vacuum insulation material is prepared in advance.
Since it is compressed under a load of I kg/cnf, this thickness will not change even if the adhesive is disassembled and discharged in the vacuum container. Even if the density is increased in this way, the glass wool board 5 has a
If it has a diameter of about 0μ.

The degree of filling is small, less than 1096, and most of the fibers are voids.The glass wool fibers are in contact with each other in the direction of heat transfer, and are not continuous, which increases contact thermal resistance and improves insulation. Capacity can be increased dramatically.

〔Effect of the invention〕

As described above, the glass wool plate 5a is obtained by compressing the glass wool 5 under pressure and mixing adhesive therein, surrounding it with the outer plate 6, heating and discharging the adhesive, and creating a high vacuum inside. It is possible to obtain a flat plate-shaped vacuum heat insulating material having a thermal performance of 1.1, which is effective in a wide range of applications.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional flat vacuum insulation material, FIG. 2 is a cross-sectional structural view of FIG. 1, FIG. 3 is a perspective view of the glass wool of the present invention before compression, and FIG. The figure is a perspective view of a glass wool plate, FIG. 5 is a perspective view of a vacuum insulation material with a glass wool plate installed therein, and FIG. 6 is a cross-sectional structural view of FIG. 5. 5...Glass wool, 5a...Glass wool board, 6
... Outer plate, 7... Pipe, 7a... Sealing cut. Stem 1 Mouth ¥3 Figure Y5 Figure 6 Figure

Claims (1)

[Claims] Glass wool (5) is compressed under pressure, and an adhesive is injected and cured to form a high-density glass wool plate (5a),
This is installed inside the outer plate (6) to which the vacuum pipe (7) is connected, and after welding the outer periphery of the outer plate (6), the adhesive material of the inner glass wool plate (5a) is heated and discharged, and the inside is heated. A vacuum insulation material characterized in that the entire pipe (7) is formed into a flat plate shape by evacuating and sealing the pipe (7).