JPH0735944B2 - Heat-insulating box such as refrigerator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating box such as a refrigerator.

2. Description of the Related Art In recent heat-insulating box bodies such as refrigerators, it is often used to provide a condenser pipe forming a part of a cooling cycle by exposing the body without exposing the condenser to the body. . Then, after forming an outer box which constitutes both side surfaces, a bottom surface, a top surface and a back surface, they are fixed with a condensing pipe and an aluminum foil or the like.

The problem to be solved by the invention is, however, that in the heat insulation box in which the condensation pipe is fixedly arranged with aluminum foil or the like after the outer box is formed, the work of fixing the condensation pipe has one size such as the outer box. Since it is performed within the limited range, workability is difficult and it takes a very long time, an extremely expensive adhesive member such as aluminum foil is required, which causes high cost, and automation and labor saving are also difficult. However, there is a problem in that the aluminum foil sticking varies and the heat dissipation effect is also unstable.

The present invention solves such a conventional problem.Because the condensing pipes are fused and solidified on both the left and right side surfaces with a hot melt adhesive in advance before forming the outer box, the condensing pipe fixing work can be performed. It is an object to obtain a heat insulation box provided with a condenser having a stable heat radiation effect, which is easy and can shorten the working time, is easy to automate, reduces the number of direct materials and the number of steps.

Means for Solving the Problems In order to achieve the above object, the heat insulating box body of the present invention comprises an outer plate, a top plate, a back plate, a right side condensing pipe, a left side condensing pipe, an inner box and a foamed heat insulating material. The right side condensation pipe is formed on the right side of the outer plate forming the bottom plate, the right side and the left side, and the left side condensation pipe is formed on the left side and has a softening point of 90 ° C. or higher, and solidifies at room temperature to adhere. It is fused and solidified with a non-adhesive adhesive, one end of each of the right side condensation pipe and the left side condensation pipe is connected and piped at the top face portion, and an outer box is constituted by the back plate and the top plate. .

Effect The heat insulating box of the present invention has a stable heat radiation effect because the work of fixing the condensing pipe is easy, the working time can be shortened, and the connecting pipes at one end of each of the left and right condensing pipes are easy.

Example Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

1 is an outer plate, 2 is a top plate, 3 is a back plate, and these are outer boxes 4
Are configured. Reference numeral 5 is an inner box, and 6 is a foamed heat insulating material filled between the boxes 4 and 5. The outer plate 1 is composed of a right side surface 7, a left side surface 8 and a bottom surface 9. The right side condensing pipe 10 and the left side condensing pipe 11 have a plurality of folds, and are round pipes made into flat pipes by pressing or the like. Both pipes 10 and 11 are previously coated with a hot-melt adhesive 12 of an ethylene vinyl acetate type which has a softening point at 90 ° C. or higher and is solidified at room temperature and has no tackiness by a roll coater or the like. And right side condensation pipe 10
The adhesive 12 is applied to the right side 7 of the outer plate 1 in a flat plate shape, and the adhesive 12 to the left side condensation pipe 11 is attached to the left side 8 to raise the temperature in advance. The adhesive 12 is melted by heating under pressure with a pressing plate such as a press and then cooled, so that the adhesive 12 is attached to the right side surface 7 and the left side surface 8 of the outer plate 1 and the right side condensing pipe 10 and the left side. The surface condensing pipe 11 is fixedly arranged. Then, the outer plate 1 is U
The right side surface 7 and the left side surface 8 are formed centering on the bottom surface 9 which is bent in a circular shape. Then, one end 10a of the right side condensing pipe 10 and one end 11a of the left side condensing pipe 11 are connected at the top surface portion. Then, the inner box 5, the back plate 3, and the top plate 2 are assembled in this order, and the foam heat insulating material 6 is foam-filled between the inner box 5 and the outer box 4 to arrange the right side condensation pipe 10 and the left side condensation pipe 11. I'm backing up the equipment.

Therefore, (1) The work of fixing the condensing pipes 11 and 12 is the outer plate 2
Can be performed in a flat plate state, the work is simple, the work time can be shortened, the automation is easy, and the number of direct materials and man-hours can be reduced.

(2) With the condensing pipes 11 and 12 fixedly mounted on both side surfaces 7 and 8, the outer plate composed of the bottom surface 9 and both side surfaces 7 and 8 can be bent in a U shape. From right side condensing pipe 10
Since the left side condensing pipe 11 and the left side condensing pipe 11 can be connected at the top surface portion, automation can be facilitated and the number of direct materials and the number of steps can be reduced.

(3) Adhesive fixing of the condensing pipes 11 and 12 is reliable, heat conduction is improved, and a stable heat dissipation effect is obtained.

EFFECTS OF THE INVENTION As described above, according to the heat insulating box of the present invention such as a refrigerator, the adhesive is softened at 90 ° C. or more and solidifies after being attached to the outer box and has no tackiness, so workability is improved. .

Further, since the condensing pipe can be securely fixed, heat conduction becomes good.

[Brief description of drawings]

FIG. 1 is a sectional view of a heat insulation box of an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a side sectional view of FIG. 1 ... Outer plate, 2 ... Top plate, 3 ... Back plate, 5 ... Inner box, 6
…… Foam insulation, 7 …… right side, 8 …… left side, 9 ……
Bottom, 10 …… Right side condensation pipe, 11 …… Left side condensation pipe, 12 …… Adhesive.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masafumi Nakamoto 3-22, Takaidahondori, Higashiosaka, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd. (56) References

Claims (1)

[Claims] 1. An outer plate, a top plate, a back plate, a right side condensing pipe, a left side condensing pipe, an inner box, and a foamed heat insulating material, and forms a bottom plate, a right side, and a left side. The left side condensation pipe on the right side of the outer plate and the left side condensation pipe on the left side of the outside plate each have a softening point of 90 ° C. or more and solidify at room temperature and are fused and solidified with a non-tacky adhesive. A heat-insulating box body such as a refrigerator, which is equipped with a container, and has one end of each of the right-side condensing pipe and the left-side condensing pipe connected to a top surface portion to form a back box and a top plate as an outer box.