JPS649519B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention integrates a vacuum insulation material and a foam insulation material such as polyurethane or polystyrene, which can be used for partition walls between the freezing compartment and the cold storage compartment of a refrigerator. This invention relates to a vacuum insulation composite and its manufacturing method.

Conventional technology In general, in refrigerators equipped with cooling systems such as compressors and coolers, if the cooling systems are the same, the wall thickness of the refrigerator, that is, the thickness of the foam insulation material such as polyurethane, is the thicker, the more the air flows inside the refrigerator than outside the refrigerator. The amount of heat absorbed by 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, and an increase in the weight of the refrigerator itself. In order to eliminate this drawback, a material with higher heat insulating properties than the foam heat insulating material, ie, a vacuum heat insulating material filled with silica gel or the like is used as an alternative to the foam heat insulating material such as polyurethane. Generally, the thermal conductivity of polyurethane foam insulation is
0.016Kcal/mh℃, whereas the thermal conductivity of vacuum insulation materials such as silica gel is approximately 0.009Kcal/m
At h℃, it is approximately 1/2 that of polyurethane foam insulation. Therefore, it has been proposed to use vacuum insulation materials, which can reduce the wall thickness of the compartment wall that separates the refrigerator or freezer compartment from the cold storage compartment, increasing the effective internal volume.
Furthermore, by reducing the external volume of the outer box, it is expected that the installation area will be reduced and the weight of the refrigerator itself will be reduced.

Problems to be Solved by the Invention However, when using the vacuum insulation material with the above-mentioned structure, for example, as a dividing wall between the freezer compartment and the cold storage compartment of a refrigerator, the vacuum insulation material is exposed with a film. The film is used to maintain the internal vacuum, so if the film is scratched and damaged during the assembly process of the refrigerator, the vacuum may be broken and the specified insulation performance may not be achieved, or the silica gel inside may leak out. It can be predicted that problems will occur if it becomes unusable.

Furthermore, since the shape is simple, such as a bag-shaped film filled with silica gel and then evacuated, it is difficult to form it into a complicated shape, and it is difficult to form it into a complicated shape, such as a partition wall between the freezer and refrigerator compartments. When used in a place where there is a large temperature difference, it is difficult to maintain the temperature difference because the surrounding area cannot be completely isolated or sealed.

The present invention has been made in view of the above points, and provides a vacuum insulation material composite that prevents the film from being easily damaged during the assembly work of refrigerators, etc., and that can be easily installed in refrigerators, etc. Another object of the present invention is to provide a method for manufacturing a vacuum heat insulating material composite that enables molding of complex shapes such as compartments.

Means for Solving the Problems In order to achieve the above object, the present invention comprises a vacuum insulation material covered with a bag-shaped film, and a foam insulation material covering the outer periphery of the vacuum insulation material, and a bonded portion of the film is It protrudes from the side of the foam insulation material. Furthermore, when manufacturing the film to be embedded in a vacuum insulation material, the outer joint of the film is sandwiched between molding molds to float the vacuum insulation material inside the molding chamber, and then the foam insulation material is placed inside the molding chamber. It is filled and foamed.

Effects According to the present invention, with the above-described configuration, the vacuum insulation material is protected by the foam insulation material such as polyurethane or polystyrene, and damage to the film of the vacuum insulation material during assembly work can be prevented. The foam insulation material that covers the vacuum insulation composite is easy to mold and can be molded into various complex shapes that match the shape of the place where it will be used, making it possible to increase the precision of the fit between the place where it will be used and the vacuum insulation composite. Furthermore, it is also possible to attach using an engaging means by drilling a hole in the part of the film joint that protrudes from the foamed heat insulating material. Furthermore, in manufacturing it, by sandwiching the joint part of the vacuum insulation material in the mold and making it float, the vacuum insulation material can be reliably embedded in the foam insulation material, and complex shapes can be easily molded. This is something that can be done.

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

Reference numeral 1 denotes the refrigerator body, which includes an inner box 2 made of synthetic resin material by vacuum forming, an outer box 3 made of iron plate, both boxes 2,
3 is made of a foamed heat insulating material 4 made of polyurethane or the like filled with foam. Reference numeral 5 denotes a dividing wall that separates the inside of the refrigerator into upper and lower parts, defining a freezing compartment 6 in the upper part and a refrigerating compartment 7 in the lower part. Reference numeral 8 denotes a cooler housed within the partition wall 5, and together with a compressor 9, a condenser 10, etc., constitutes a well-known refrigeration cycle. Reference numeral 11 denotes a dividing wall bottom plate which also serves as the ceiling wall of the refrigerator compartment 7. 12 is the partition wall bottom plate 11
1 is a partition wall insulating material on which the cooler 8 is placed, and 13 is a bottom plate of the freezing chamber.

FIGS. 2 and 3 show a partition wall insulation material (vacuum insulation composite) 12, which is composed of a vacuum insulation material 14 and a foam insulation material 19 which is completely arranged and formed into a dish shape. The vacuum heat insulating material 14 consists of a paper bag 15 containing a powder filler 16 such as silica gel inside, and a bag-shaped film 17 such as a polyethylene sheet covering the outer periphery of the paper bag 15. The outer periphery of this film 17 is heat-sealed to form a welded joint 18.

To explain the production of the partition wall insulation material 12 with the above configuration, the pre-made vacuum insulation material 14 is
The joint part 18 is sandwiched between the joint surfaces 22 of the pair of upper and lower molds 20 and 21 and placed floating in the molding chamber 23, and then the undiluted solution of the heat insulating material is filled from the runner 24 of the lower mold 20. The outer periphery of the vacuum insulation material 14 is covered with a foam insulation material 19 that has been foamed and molded into a predetermined shape as shown in FIG.
Take it out and complete it.

As described above, according to this embodiment, since the outer periphery of the partition wall insulation material is covered with the foam insulation material 19 to form a vacuum insulation composite, it is possible to
This eliminates the problem of damage to the film 17 of the vacuum insulation material 14, which caused the vacuum to break and become unusable.In addition, the foam insulation material 19 prevents the condenser 8 from having a complicated shape, such as the receiving part of the cooler 8 and the fitting shape with the inner box 2. Since the shape is formed, the freezer compartment 6 and the refrigerator compartment 7 can be completely shut off, and a predetermined temperature difference can be maintained.
It can be shaped to ensure water flow when defrosting frost that has adhered to the surface.

Regarding the manufacture of the partition wall insulation material 12, the joint portion 18 of the vacuum insulation material 14 is sandwiched between a pair of molds 20 and 21 and molded by floating it in the molding chamber 23, so that the film 17 of the vacuum insulation material 14 is molded. To manufacture a partition wall heat material 12 that can be reliably embedded in a foam heat insulating material 19 without being exposed to the surface and that is embedded in the foam heat insulating material 19 of a vacuum heat insulating material 14 having a complicated shape as the intended purpose. There are things that can be done. Also,
Although this example has been explained by using the vacuum insulation composite for the partition wall, it is of course possible to use the vacuum insulation composite in places other than the partition wall. It is also possible to carry out the process using engagement and fitting means.

Effects of the Invention As described above, the present invention involves sandwiching the film joint portion of the outer periphery of a vacuum insulation material covered with a film between a pair of molds, floating the vacuum insulation material in a molding chamber, and then inserting the film into the molding chamber. This is a method of filling and foaming the insulation material and covering the outer periphery of the vacuum insulation material with the foam insulation material, so it is extremely easy to obtain a composite of the foam insulation material and the vacuum insulation material, and there is no misalignment of the vacuum insulation material. Since there is no heat insulating material, it can be reliably embedded in the foam insulation material, and it is also possible to prevent a decrease in vacuum performance due to film damage of the vacuum insulation material. The foam insulation material that covers the outer periphery of the vacuum insulation material is easy to mold and can be molded into various complex shapes that match the shape of the place where it will be used, making it easy to install and also compatible with the place where it will be used and the vacuum. It is possible to improve the accuracy of fitting with the heat insulating composite, and it is also possible to attach using an engagement means by drilling holes in the part of the film joint that protrudes from the foam heat insulating material. .

[Brief explanation of drawings]

Fig. 1 is a sectional view of a refrigerator adopting an embodiment of the present invention, Fig. 2 is a sectional view of a vacuum insulation composite according to an embodiment of the invention during molding, and Fig. 3 is a perspective view of the vacuum insulation composite. FIG. 4 is a sectional view of the vacuum heat insulating material. 12... Division wall insulation material, 14... Vacuum insulation material,
17...Film, 19...Foam insulation material, 18...
...joint part, 20, 21...mold.

Claims (1)

[Claims] 1. A vacuum insulation material covered with a bag-shaped film;
A vacuum insulation composite consisting of a foam insulation material such as polyurethane or polystyrene molded to cover the outer periphery of the vacuum insulation material, and a joint of a film that forms the outer covering of the vacuum insulation material protrudes from the side of the foam insulation material. . 2. The film joint of the outer periphery of the vacuum insulation material covered with a bag-shaped film is sandwiched between a pair of molding molds to float the vacuum insulation material into the molding chamber, and then the insulation material is filled into the molding chamber. A method for manufacturing a vacuum insulation composite in which the outer periphery of the vacuum insulation material is covered with the foamed insulation material and the film joint part is protruded outside the foam insulation material.