JPS60174473A - Manufacture of heat-insulating structure - 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] [Technical Field] The present invention involves filling and foaming a foamed insulation material between a disk and an outer panel, and embedding a vacuum insulation panel in the foamed insulation AA. The present invention relates to a method of manufacturing such a heat insulating structure.

[Prior art]

In general, insulating boxes for refrigerators and the like are made by injecting and foaming a foam insulation material such as a hard urethane film between an outer box made of iron plates and an inner box made of plastic, or by foaming them with such insulation properties. Even the thermal conductivity of p-type aluminum foam, which is excellent in thermal conductivity, is ri 0.013Kcal/1ηIr°C, and it is difficult for a carbon-based IC to achieve any higher thermal insulation properties with only foam insulation.

So, recently, I was using foam insulation and J'! One idea is to improve the insulation performance by burying empty insulation panels (vacuumed airtight containers), but this kind of thing lacks specificity. Also, even if there was a concrete thing, it would be to install a vacuum insulation panel in a floating state with a spacer etc. in advance in the space between the disc and the outer panel, and to remove the inner and outer panels. Since the foam insulation material was injected and foamed between the vacuum insulation panel and the vacuum insulation panel, it took time to install the vacuum insulation panel 171, and there was thermal transfer through the spacer and the airtight container of the vacuum insulation pile. Although Nur thermal panels are used, they have the disadvantage that they cannot provide good thermal insulation properties.

〔the purpose〕

The object of the present invention is to easily install a vacuum insulation panel without using a spacer and to improve its insulation properties.

〔Example〕

1 is a disk made of a synthetic resin material and forms an inner box; 2 is an outer plate made of a metal plate and forms an outer box; 3 is a foam sprayed onto the surface of the outer plate 2; As a heat insulating material, before the foam heat insulating material 3 gels and becomes dry to the touch, the vacuum heat insulating panel 4 is bonded by the adhesive action of the foam heat insulating material 3.
It is for fixing.

The vacuum insulation panel 4 is made by placing an inorganic powder such as perlite, a foam with open cells, or a laminate made of a heat reflecting plate and a shielding material in a bag-like airtight container made of a composite laminate film of metal, plastic, etc. Then, it was degassed to create a vacuum state.

5 fixes the vacuum insulation panel 4 with the foam insulation material 3 sprayed onto the inner surface of the outer panel 2, and then injects foam into the space formed between the outer panel 2 and the inner panel 1. The foamed heat insulating material made of the same material as the foamed heat insulating material 3 used for previously identifying the vacuum heat insulating panel 4 on the inner surface of the outer panel 2 is used.

In the above embodiment, the vacuum insulation panel 4 is attached to the inner 1n1 side of the outer panel 2, but it is also possible to attach the vacuum insulation panel 4e to the outer surface of the inner panel 1.

Here, the assembly work of the heat insulating box of the present invention will be explained. First, the foam insulation material 3 is spray applied to the inner surface of the outer panel 2 at the position where the vacuum insulation panel 4 is to be attached. Then,
After the foamed insulation material 3I''i is spray applied, it becomes creamy, begins to foam, and gradually becomes a gel.When the vacuum insulation panel 4 is crimped when the foamed insulation material 3 is gelled, as the foamed insulation material 3 foams and solidifies, it becomes creamy. Vacuum insulation panel 4 is outer panel 2
Glued and held on the side.

Then, the inner plate 1 is assembled into the outer plate 2, and the final foamed heat insulating material 5 is injected and foamed into the space (by doing this, the outer plate 2, inner plate 1 and The vacuum insulation panel 4 is firmly integrated and connected by the adhesive action of the foam insulation material 3.5 [Effect] As described above, the insulation panel mounting position of either the disk or the outer panel can be adjusted. Then, after spraying the foam insulation material and attaching the vacuum insulation panel using the adhesive action of the foam insulation material, another inner panel or outer panel is installed, and the foam is inserted between the inner panel and the outer panel. Since the three parts are bonded together by injecting and foaming the insulation material, there is no need for spacers etc. when installing the vacuum insulation panel, making workability extremely good, and heat conduction through the spacers etc. Therefore, it is possible to produce a highly insulating structure that takes advantage of the characteristics of vacuum insulated panels, which has the remarkable effect of making it possible to produce a highly insulated structure.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway external perspective view of a heat insulating box used in the present invention, and FIG. 2 is a sectional view taken along the line AA' in FIG. 1. 1: Disk, 2: Outer plate, 3, 5: Foam insulation, 4° vacuum insulation panel.

Claims (1)

[Claims] 1. After blowing foam insulation material over the insulation panel mounting position 11q on either the disc or the outer panel, and removing the vacuum insulation panel using the adhesive action of the foam insulation material,
A method for manufacturing a heat insulating structure, characterized in that another disk or outer plate is incorporated, and a foamed heat insulating material is injected and foamed between the inner plate and the outer plate to join the three parts together.