JPS5878082A - Heat insulating box body with 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 The present invention relates to an insulating box body used in refrigerators, etc., which is equipped with an inner box, an outer box, foam insulation material, and vacuum insulation material. This makes it easy to install and support a vacuum insulation material filled with .

Generally speaking, if the cooling system is the same in refrigerators equipped with cooling systems such as compressors and coolers, the wall thickness of the refrigerator, that is, the thickness of the foam insulation material layer such as polyurethane, is thicker.
The amount of heat absorbed into the refrigerator than outside the refrigerator is reduced, and the cooling efficiency of the refrigerator itself is improved, thereby reducing power consumption. However, disadvantages arise, such as a decrease in the effective internal volume of the refrigerator due to an increase in wall thickness, an increase in the installation area of the refrigerator due to an increase in the outer box, and an increase in the weight of the refrigerator itself. In order to eliminate this drawback, a vacuum insulation material containing silica or the like is used as an alternative to a material with higher insulation properties than the foam insulation material, ie, a foam insulation material such as polyurethane. In general, the thermal conductivity of polyurethane foam insulation is 0.01617/m h''C, whereas the thermal conductivity of vacuum insulation materials such as silica is approximately 0-0091c.
aI/mh''C, the thermal conductivity is lower than that of polyurethane foam insulation. Therefore, by embedding vacuum insulation material in the polyurethane insulation layer, vacuum insulation material and foam insulation material can be used together. As a result, it is expected that the wall thickness of the refrigerator can be reduced, the effective internal volume will be increased, the installation area will be reduced by reducing the external volume of the outer box, and the weight of the refrigerator itself will be reduced.

Conventionally, when a vacuum insulation material is used in combination with a foam insulation material as described above, it is considered that the vacuum insulation material is sealed in a bag-shaped vacuum pack and fixed with tape, adhesive, or the like. However, in such cases, the inner box has a complicated shape, so a lot of tape is needed.

Adhesive is required, and the pasting process is difficult and time-consuming, resulting in high costs.Furthermore, tape or adhesive is weak in fixing, and when inserting the inner box into the outer box, it may be difficult to apply tape or adhesive. Problems can be foreseen, such as peeling off of the attached part, or the vacuum insulation material peeling off from the inner box and moving within the heat insulation space layer when foaming the insulation material such as polyurethane, and not functioning satisfactorily as a vacuum insulation material.

The present invention has been made in view of the above points, and its purpose is to attach a vacuum insulation material sealed in a bag-shaped vacuum pack on the back wall of the inner box to the inside of the inner box, such as for electrical equipment, etc. By fixing using the mounting parts, it shortens the installation time, reduces costs, and prevents peeling of tape, adhesive, etc. when inserting the inner box into the outer box, or when foaming occurs. An object of the present invention is to provide a heat box body equipped with a vacuum heat insulating material that can prevent the movement of the vacuum heat insulating material.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 designates the refrigerator body, which is comprised of an inner box 2 made of synthetic resin by vacuum forming, an outer box 3 made of iron plate, and a foamed heat insulating material 4 made of polyurethane or the like foamed and filled between the two boxes.

Reference numeral 6 denotes a dividing wall that divides the inside of the refrigerator into upper and lower sections, defining a freezing chamber 6 on the upper and lower sides and a refrigerating chamber 7 on the lower side. Reference numeral 8 denotes a cooler housed within the partition wall 5, and together with 1, a compressor 9, a condenser 10, etc., constitutes a well-known refrigeration cycle. Reference numeral 11 denotes a mounting part for mounting and supporting an electrical equipment box 12 (hereinafter simply referred to as a part) that houses electrical equipment (not shown) such as a thermostat and an interior light.
1b.

Furthermore, a concave portion 11c is provided on the mounting flange side, and penetrates through the inner box 2 to position a cylindrical portion 11b on the back surface of the inner box.

Reference numeral 13 denotes a screw for fixing the component 12 and the mounting component 11.

14 is a vacuum heat insulating material, and 16 is a paper bag containing a powder filler 16 such as silica inside and having a mounting portion 17 formed in the center of the bag.

18 is a film such as a polyethylene sheet that covers the outer periphery of the paper bag 15. The periphery 18a of the film 18 and the mounting portion 17 are heat sealed to form welded portions 19a and 119b. The attachment portion 17 of the vacuum heat insulating material 14 is fitted into the cylindrical portion 11bK'' of the attachment component 11, and is fixed with a screw 21 via a washer 20 shaped to fit the concave portion 11c.

At this time, the welded portion 19b follows the concave portion 11c as the screw 21 is tightened, and tearing of the welded portion 19b during tightening is prevented.

In addition, to briefly explain the manufacturing method of the vacuum insulation material 14, first, a powder filler 16 such as silica is filled into a paper bag 16 having a mounting part 17 in the center, and then thoroughly dried.
8 or between two films, and the periphery 18a of the film 18 and the mounting portion 17 are welded together in a vacuum atmosphere.

FIG. 5 shows another embodiment, in which a container 22 (corresponding to the component 12) placed in the refrigerator is supported, and a vacuum insulation material 14 is connected to the vacuum insulation material 14 by a screw 24. The mounting portion 17 is fixed via a welded portion 19b.

In this configuration, the vacuum heat insulating material 14 has a mounting part 11 for mounting a part 12 to be mounted inside the inner box 2.
Then, the mounting portion 17 is fitted, and then fixed with a screw 21 via a washer 20.

Then, as the screw 21 is tightened, the welded part 1eb becomes the concave part 1.
It sinks into 1c and is firmly fixed. Especially the welded part 19
Since it is fastened with the screw 21 at the part b, the vacuum part will not be damaged and the insulation performance will not be degraded. Of course, the welded portion 19a may be used for attachment.

As described above, the present invention includes an inner box, an outer box, a mounting part for fixing parts such as electrical equipment attached to the inner box, and a vacuum insulation material covered with a bag-shaped film. The vacuum insulation material is attached to the attachment part via the attachment part formed on the welded part of the film, and the space between the inner box and the outer box is filled with foam insulation material, which can be used with tape, adhesive, etc. Seven pages are unnecessary, and there is no peeling when the inner box is moved during manufacturing or when the inner box is inserted into the outer box, and it does not move due to foaming pressure when foaming insulation materials such as polyurethane. .

Furthermore, since the welded part of the film is used as the attachment part, it has great practical effects, such as stable attachment that does not adversely affect the vacuum section and the ability to maintain heat insulation performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a refrigerator adopting an embodiment of the present invention, Fig. 2 is a perspective view showing a state in which the vacuum insulation material is attached to the inner box, and Fig. 3 is an enlarged cross section of the vacuum insulation material attachment part. 4 is a sectional view of the vacuum heat insulating material, and FIG. 6 is a sectional view corresponding to FIG. 3 showing another embodiment. 3...outer box, 2...inner box, 11...
...Mounting parts, 14...Vacuum insulation material, 18.
...Film, 19b...Welded part, 4.
...Foam insulation material O name of agent Patent attorney Toshio Nakao and one other person Special 1ii11H5B-780132
(3)! Jilt diagram / 13a! 11 1a

Claims (1)

[Claims] A mounting part comprising an inner box, an outer box, a mounting part for fixing parts to be mounted inside the inner box, and a vacuum insulation material covered with a bag-shaped film, and formed at a welded part of the film. A heat insulating box body comprising a vacuum heat insulating material in which the vacuum heat insulating material is attached directly to the mounting portion through a vacuum heat insulating material and a foamed heat insulating material is filled between the inner box and the outer box.