JPS6216638Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an insulating box body used for refrigerator cases, hot storages, etc., which includes an inner box, an outer box, foam insulation material, and vacuum insulation material.

Conventional structure and its problems In general, in a refrigerator equipped with a cooling system such as a compressor and a cooler, if the cooling system is the same, 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, the cooling efficiency of the refrigerator itself is improved, and power consumption is therefore reduced. However, as the wall thickness increases, there are disadvantages such as a decrease in the effective internal volume of the refrigerator, an increase in the installation area of the refrigerator due to the increase in the outer box size, 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 a substitute for a foam insulation material such as polyurethane, which has a higher insulation property than the foam insulation material. Generally, the thermal conductivity of polyurethane foam insulation is
0.016kcal/1mh℃, whereas the thermal conductivity of vacuum insulation materials such as silica is approximately 0.009kcal/mh
Thermal conductivity at ℃ is approximately 1/2 that of polyurethane foam insulation. Therefore, it has been proposed to use vacuum insulation and foam insulation together, such as by embedding the vacuum insulation in the foam insulation layer made of polyurethane, etc., and this will reduce the wall thickness of the refrigerator. We can expect an increase in storage capacity, a reduction in installation area due to a reduction in the external volume of the outer box, and a reduction in the weight of the refrigerator itself.

Conventionally, when a vacuum heat insulating material is used in combination with a foam heat insulating material as described above, it has been considered to affix and fix the vacuum heat insulating material sealed in a bag-shaped pack with tape, adhesive, or the like. However, in such cases, it causes high costs, and in addition, fixing with tape adhesive is weak, and the part where the tape or adhesive is attached may peel off when inserting the inner box into the outer box. At times, the vacuum insulation material peeled off from the inner box and moved within the insulation space, so that it did not work effectively as a vacuum insulation material on the insulation box.

Purpose of the invention The present invention has been made in view of the above points.The radiator is installed using the welded part of the film that is the outer covering of the vacuum insulation material, thereby shortening the installation time and reducing the cost. This is what we aim to do.

Structure of the Invention In order to achieve the above object, the present invention has a heat radiator attached to the welded part of the film that is the outer cover of the vacuum insulation material provided together with the foam insulation material between the inner and outer boxes.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is the insulating box body of the refrigerator, which includes an inner box 2 made of synthetic resin material by vacuum forming, an outer box 3 made of iron plate, and an insulating material 4 such as polyurethane foam filled between the boxes 2 and 3. Become. Reference numeral 5 denotes a radiator for dissipating the heat of the high-temperature, high-pressure refrigerant discharged from the compressor, and is formed in a substantially mouth shape along the inner corner of the outer box 3.
Then, before the polyurethane or the like is foamed, it is fixed to the iron plate outer box 3 with tape or the like. Reference numeral 6 denotes a vacuum heat insulating material, which houses a powder filler 8 such as silica, and vacuum-packs the powder filler 8 with a film 9 such as a polyethylene sheet.
Then, both sides of the polyethylene sheet portion of the powder filler are welded. The vacuum heat insulating material 6 is formed into a cylindrical shape 6', the heat radiator 5 is inserted into the cylindrical shape 6', and the vacuum heat insulating material 6 is fixed to the iron plate outer box 3 at the same time.
Thereafter, the inner box 2 is inserted into the outer box 3 and filled with the heat insulating material 4.

In addition, a corner portion 3' is formed on the back wall of the outer box 3 to protrude to the rear, and the radiator 5 is provided at this corner portion 3'.
It is located along the back wall of the

In this way, since the vacuum heat insulating material 6 is attached to the heat radiator 5 in advance and then attached to the outer box 3, the assembly work is simplified. Further, since the heat radiator 5 is attached to the corner portion 3', the vacuum heat insulating material 6 is attached along the back wall of the outer box 3, so that the heat insulating material 4 does not move when foaming. Due to this,
The vacuum heat insulating material 6 shields heat from entering from the outside.

Effects of the Invention As described above, in this invention, the radiator is attached to the welded part of the film that is the outer cover of the vacuum insulation material provided together with the foam insulation material between the inner and outer boxes, so it is easy to install the radiator between the inner and outer boxes. Easy to insert. Furthermore, it becomes possible to fix the vacuum insulation material to the outer box at the same time as fixing the heat sink, and there is no need for tape or other attachment parts. In addition, the installation process of vacuum insulation material can be significantly shortened in time, and there is no need to move the outer box during manufacturing or peel off when the inner box is inserted into the outer box, and foaming when foaming insulation materials such as polyurethane. It does not move due to pressure. In addition, 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 part of the vacuum insulation material and the ability to maintain insulation performance.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a refrigerator employing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a vacuum insulation attachment part, and FIG. 3 is an exploded perspective view of a radiator and an outer case. 2...Inner box, 3...Outer box, 4...Insulating material, 5...
...Radiator, 6...Vacuum insulation material.

Claims (1)

[Scope of utility model registration request] It is equipped with a vacuum insulation material consisting of an inner box, an outer box, a foam insulation material and a vacuum insulation material provided between the inner and outer boxes, and a radiator attached to the welded part of the film that is the outer covering of the vacuum insulation material. Insulated box body.