JPH0141901B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat insulating pack used as a heat insulating structural material for a heat insulating box such as a refrigerator.

Structure of the conventional example and its problems FIGS. 3 to 6 show a conventional heat insulating pack. The configuration of this conventional example will be explained below with reference to FIGS. 3 to 6.

In the figure, reference numeral 1 denotes a heat insulator pack, in which a breathable inner bag 2 is filled with powder 3 such as foamed perlite, and the inner bag 2 is placed inside a sealed container 4 made of a plastic-metal laminate film or the like. It is organized by storing it in. The heat insulator pack 1 consists of a short side 1a and a long side 1b, one short side 1a and two long sides 1b are sealed 5 in advance, and the remaining short side 1a is sealed 5 under reduced pressure. is,
The inside of the sealed container 4 is maintained at reduced pressure. Reference numeral 6 denotes a passage consisting of a space intentionally provided between the inner bag 2 and the sealed container 4, and is provided so that air can easily move during depressurization. 7 is a heat insulating wall with an outer panel 8 and an inner panel 9
A hard urethane foam 10 is integrally foamed in between. A heat insulator pack 1 is attached to the outer panel 8 with an adhesive 11.

Next, the operation of the conventional example will be explained. In order to efficiently exhaust the air inside the sealed container 4 in such a heat insulating pack 1, the passage 6 is provided, but in the atmosphere after depressurization, the passage 6 is closed as shown in FIG.
is suppressed by atmospheric pressure and disappears. Then, a fin 12 corresponding to the length of the passage 6 is left.

Furthermore, when the hard urethane foam 10 is foamed to form the heat insulating wall 7, the fins 12 obstruct the flow of the hard urethane foam 10, causing air pockets 13 to form above the fins 12, or causing the cells of the hard urethane foam 10 to There was also the problem that the particles were oriented, resulting in poor low-temperature dimensional stability.

OBJECTS OF THE INVENTION The present invention eliminates the drawbacks of the above-mentioned conventional example, and aims to eliminate the fin treatment of the heat insulating pack and to reduce the obstruction of the flow of the hard urethane foam by the fins.

Structure of the Invention In order to achieve the above object, the present invention is such that an inner bag filled with powder and a passage member are housed in a sealed container, and the pressure inside the sealed container is reduced.

DESCRIPTION OF THE EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Structures that are the same as those of the prior art will be given the same reference numerals and detailed explanations thereof will be omitted.

In the figure, reference numeral 14 denotes a passage member molded from resin or the like, which is installed on two long sides 1b in contact with the inner bag 2, and is molded into a channel shape so that air from the inner bag 2 can easily escape. It is placed in a sealed container 4 in contact with the bag 2.

Next, the operation of the above embodiment will be explained. In the figure, the passage member 14 is connected to the sealed container 4 under reduced pressure.
Since a passage 15 is formed through which the air inside the inner bag 2 is exhausted, efficiency in lowering the pressure to a predetermined degree is improved.

Further, since the passage member 14 itself has rigidity, it maintains its shape even when placed under atmospheric pressure, and the sealed container at that portion is not pressed and deformed to form the fin 12. Furthermore, if the shape of the passage member 14 is taken into consideration, it is possible to reduce wrinkles caused by sagging of the sealed container 4 that occurs between the seal portion 5 of the sealed container 4 and the inner bag 2, and a good appearance can be created. .

Effects of the Invention The present invention has the above-described configuration, and the following effects can be obtained.

(a) A passage member placed in the sealed container together with the inner bag forms a passageway, which facilitates prompt exhaustion of air within the inner bag.

(b) The passage member prevents deformation of the sealed container, reduces wrinkles, and improves appearance.

(c) The fins are only for the sealing part, and when making the insulation wall, there is no need to treat the fins because they do not have a length that will obstruct the flow of urethane foam.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a heat insulating pack according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of the heat insulating pack shown in Fig. 1 attached to a heat insulating wall, and Fig. 3 is a conventional heat insulating body. 4 is a sectional view of the pack shown in FIG. 3 before depressurization, FIG. 5 is a sectional view of the heat insulating pack attached to the heat insulating wall, and FIG. 6 is a sectional view of FIG. 3. 1... Insulator pack, 2... Inner bag, 3... Powder, 4... Sealed container, 14... Passage member.

Claims (1)

[Claims] 1. An inner bag filled with powder, a passage member provided on two opposing sides of the outer periphery of the inner bag to form a passage, and a sealed container that houses the inner bag and the passage member and has a reduced pressure inside. A heat insulating pack.