JPS61285365A - Manufacture of heat-insulating box body of refrigerator, etc. - 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] Industrial applications The present invention relates to a heat insulating box for a refrigerator or the like.

Conventional technology Recently, in many insulated boxes such as refrigerators, the condenser that forms part of the refrigeration cycle is not exposed on the main body, but a pipe as a condenser is installed inside the main body. ing. For example, a round condenser pipe was bent into a meandering shape and fixed to the outer box with hot melt adhesive.

Problems to be Solved by the Invention However, in an insulating box body in which a round condensing pipe is bent into a meandering shape and fixed to the outer box with hot melt adhesive, the round condensing pipe and the outer box are The contact area with the outer box is small and heat transfer is poor.There are also some non-contact parts, making the heat dissipation effect unstable.Also, the round condensing pipe is bent in a meandering shape, so it does not come in contact with the outer box. It is difficult to follow, and since the contact is applied with stress by hot pressing, it is easy to come off due to external stress.Therefore, a large amount of hot melt adhesive is applied, which is a cause of high cost and is detrimental to energy saving. was.

The present invention solves these conventional problems by increasing the total contact area of the condensing pipe with the outer box, reducing the amount of hot melt adhesive applied, reducing cost, and achieving a stable and reliable heat dissipation effect. The purpose is to obtain a heat insulating box equipped with a condenser having the following properties.

Means for Solving the Problems In order to achieve the above object, the insulating box of the present invention includes an outer box forming an outer shell of the insulating box, and a back plate engaged with the rear edge of the outer box. , 90°C for ethylene vinyl acetate
a flat condensation pipe coated with a hot melt adhesive that has a softening point above and does not solidify or tack at room temperature; The condenser is constructed by pressurizing and heating a shaped condensing pipe with a hot press or the like to fuse and solidify the hot melt adhesive, and a foam insulation material is filled between the outer box and the inner box. It is configured as an insulated box.

Function: Since the insulating box of the present invention is equipped with a flat condensation pipe, the area in contact with the outer box is increased, the amount of hot melt applied is also reduced, reducing cost, and heat transfer with the outer box is also improved. This ensures a stable heat dissipation effect, reduces the amount of pressure applied by the hot press, and eliminates deformation of the outer box.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 shows the insulation box body of a refrigerator, where 1 is the outer box, 2
3 is a back plate engaged with the back side of the outer box, 3 is an inner box, and 4 is a foamed heat insulating material. 6. θ is the main condensation pipe and the auxiliary condensation pipe that constitute a part of the refrigeration cycle, and the outer box rear edge 1a of the insulating box, the front opening edge, the compartment front part, and the back plate 2.
The installation is missing. The main condensing vibro is held between the rear edge 1a of the outer box 1, which is formed by roll forming the rear ridge line portion of the outer box 1, and the side surface 1b of the outer box 1.

As shown in FIG. 1, the auxiliary condensing vibro has a plurality of folds, and as shown in FIG. 2, a round pipe is formed into a flat vibro a by pressing or the like. The auxiliary condensing vibro has an outer box 1
It is attached to the back plate 2 engaged with the back edge 1a of the
The flat auxiliary condensing vibro is coated with an ethylene vinyl acetate-based hot melt adhesive 7 that has a softening point of 90° C. or higher and does not solidify or tack at room temperature using a roll coater or the like.

The process involves engaging the hot-melt adhesive 7 applied surface of the flat auxiliary condensing vibro to the heat insulating material side of the back plate 2;
The hot melt adhesive 7 is melted by applying pressure and heating with a presser plate such as a hot press whose temperature has been raised in advance, and then cooling.

A hot melt adhesive 7 engages the back plate 2 and the flat auxiliary condensing vibro. After the engagement, the outer box 1 and the inner box 2
By filling the foam insulation material 4 between the auxiliary condensation vibro 0 and the O It has the effect of reducing production costs, has reliable contact with the outer box, improves heat conduction, and achieves a stable heat dissipation effect. Furthermore, since the pipe is flat, it can easily conform to the surface of the outer box, and even if the pressure of the hot press is small, it can be firmly contacted and solidified, so there will be no deformation such as dents when pasting the pipe on the surface of the outer box. It also has a preventive effect.

Effects of the Invention As described above, the heat insulating box for a refrigerator or the like of the present invention can provide the first effect.

(1) Since it is equipped with a flat condensation pipe, the area that comes in contact with the outer box is increased, and ethylene vinyl acetate-based hot melt adhesive can be applied thinly, reducing the amount of application, resulting in a cost reduction effect, and Solid contact with the box is reliable, heat conduction is direct, heat transfer is improved, and it has a stable heat dissipation effect.

? ] Since it is equipped with a flat condensation pipe, it is easy to follow the surface of the outer box, and even if the pressure of the hot press is reduced, contact solidification can be achieved reliably, so there is no deformation such as dents caused by pasting the pipe on the surface of the outer box. will no longer occur.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a refrigerator fully equipped with a heat insulating box according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. 1. 1... Outer box, 2... Back plate, 3. Old.
・Inner box, 4... Foam insulation material, 5... Flat auxiliary condensing pipe, 6... Main condensing pipe,
7.Hot melt adhesive.

Claims (1)

[Claims] It has an outer box that forms the outer shell of an insulated box such as a refrigerator, and a back plate that engages with the back edge of the outer box, and the iron plate that forms the outer box is made of ethylene vinyl acetate softened to a temperature of 90°C or higher. A flat auxiliary condenser pipe coated with a hot melt adhesive that has dots and does not solidify or tack at room temperature is heated under pressure with a hot press, etc. A method of manufacturing a heat insulating box for a refrigerator or the like, which comprises fusing and solidifying a melt adhesive to form a condenser, and filling a foam heat insulating material between the outer box and the inner box.