JPS63318474A - Refrigerator - 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 Field of the Invention The present invention relates to a refrigerator having a heat dissipation pipe to prevent frost formation in the front opening of the main body.

BACKGROUND OF THE INVENTION In recent years, a high-temperature heat dissipation pipe, which is part of a refrigeration cycle, has been installed on the front periphery of a refrigerator to prevent dew formation.

The arrangement structure of the heat dissipation pipe for preventing frost formation in the conventional refrigerator mentioned above will be described below with reference to the drawings.

FIGS. 3 to 6 show the arrangement structure of heat dissipation pipes of a conventional refrigerator.

1 is a refrigerator body, 2 is an outer box, and 3 is an inner box. A foamed heat insulating material 4 is filled between the outer box 2 and the inner box 3. Furthermore, a partition wall 5 divides the compartment into a freezer compartment 6° in the upper part and a refrigerating compartment 7 in the lower part.

The front edge opening of the outer box 2 is formed by roll former forming into an outer flange 2a, a folded flange 2b folded back on the back surface of this outer flange 2a, a bent portion 2c, and the folded flange 2.
an inner 72-inch 2d extending parallel to b at a predetermined distance;
It forms a double flange. The opening flange 3a of the inner box 3 is inserted into the double flange of the outer box 2 via a sealing member 8. 9 is inside the double flange,
That is, it is a heat dissipation pipe of a refrigeration cycle inserted into the space between the folded flange 2b and the inner flange 2c.

The operation of the refrigerator configured as above will be explained below.

Regarding the area near the front edge of the outer box 2 of the refrigerator, the heat of the outer box is conducted from the outer flange 1a-4 to the folded flange 2b → the inner box 3 → to the low-temperature inside of the refrigerator, so the temperature is very low compared to the outside temperature. temperature, and dew formation occurs. For this reason,
By disposing the heat dissipation pipe 9, which is hot during the refrigeration cycle, in the double flange, heat is conducted to the outer box 2, and dew formation in this part is prevented.

Problems to be Solved by the Invention However, in the above-mentioned configuration, the heat dissipated by the heat dissipation pipe 9 inserted into the double flange is generally conducted entirely through the outer box 2.
2 of the total amount of heat dissipated.
0 to 30% often enters the freezer compartment 6 and refrigerator compartment 7 inside the insulated box, reducing cooling efficiency.

This is because a part of the heat emitted by the heat dissipation pipe is conducted from the folded flange 2b to the inner box 3 and from the inner flange 2d to the freezer compartment via the insulation material 4 with a narrow gap between the inner box and the freezer. This is because a path is formed for intrusion into the refrigerator γ and the inside of the refrigerator γ.

In addition, the bent portion 2 of the double flange that the heat radiation pipe 9 comes into contact with
c and the outer box 2 do not come into close contact with each other, creating a gap and resulting in a non-contact state. Therefore, it is not possible to sufficiently increase the heat radiation ratio in the direction of the outer box 2, which is originally desired, and the direction of the double flange In order to solve this problem, the heat dissipation pipe 9 was removed from the double flange as shown in Fig. It is also considered that the heat dissipation pipe 9 is disposed so as to be in contact with the heat dissipation pipe 2 and fixed with a thermoplastic resin 10 having good thermal conductivity, aluminum foil, or the like (not shown).

However, in the case of a refrigerator insulation box like this, what about the inner flange? A reinforcing plate 11 is fixed to the rear surface of d to ensure the strength of the insulating box, and this reinforcing plate 11 is usually sufficiently thicker (2 to 2 mm thick) than the outer box (about 0.6 mm thick). 3
[) structure.

Therefore, if the heat dissipation pipe 9 is placed above this,
The desired heat conduction to the outer box 2 may not be achieved, or
Damage to the heat dissipation pipe 9 caused by the end 11a of the reinforcing plate 11;
There was a possibility that bending etc. would occur.

Furthermore, in the work of placing the heat dissipation pipe 9, if there is no separate fixing tape (not shown) etc. after the arrangement and before the application of the thermoplastic resin 10, etc., the heat dissipation pipe 9 may be misaligned or reduced. The problem is the cost.

It was also bad in terms of workability.

The present invention has been made in view of the above points, and prevents the pipe from being damaged or bent at the part where the reinforcing plate is fixed, prevents the pipe from being perforated due to contact and penetration of the hinge fixing screw, and furthermore prevents the pipe from being perforated due to contact and penetration of the hinge fixing screw. To provide a refrigerator in which the heat radiation pipe is positioned and fixed to ensure that the heat radiation pipe comes into contact with the outer case, thereby increasing the heat radiation ratio in the direction of the outer case.

Means for Solving the Problems In order to solve the above problems, the refrigerator of the present invention is provided by reinforcing the heat radiation pipe by disposing at least one side of the heat radiation pipe in contact with the rear surface of the double flange and the outer box. It has a structure in which it is bent before reaching the edge of the plate.

Effects The present invention has the above-described configuration, which increases the heat radiation ratio in the direction of the outer box, prevents the pipe from being damaged or bent at the part where the reinforcing plate is fixed, and further improves the positioning and fixing of the pipe during assembly work. By doing so, no additional materials are required.

EXAMPLE Hereinafter, a refrigerator according to an example of the present invention will be described with reference to the drawings. Incidentally, the same parts as those in the prior art are denoted by the same reference numerals, and the description thereof will be omitted.

In FIGS. 1 and 2, 12 is an outer box, and the front edge opening is roll-formed to form two outer flange 12a and a folded flange 1 folded back on the back side of this outer flange 12a.
2b1 bent portion 12c, and an inner flange 12d extending parallel to the folded flange 12b at a predetermined distance from each other.
A reinforcing plate 11 extending rearward is fixed to 2d by spot welding.

13 is a heat dissipation pipe, and the heat dissipation pipe 13 is connected to the reinforcing plate 11.
The corner of the heat dissipation pipe 13 is bent before reaching the end 11a of the heat dissipation pipe 13 so that the hinge fixing screw does not come into contact with or penetrate a part of the heat dissipation pipe 13 through the hinge attachment screw hole 11b of the reinforcing plate 11. The elasticity of the bent portion 13a allows the heat dissipation pipe 13 to be attached to the outer box 12.
The lateral positioning of the inner flange 12d is ensured.
It is arranged so that it abuts on the outer box 12 at the rear.

Further, in order to improve heat conduction to the outer box 12, it is fixed with a thermoplastic resin 10 (hereinafter referred to as hot melt) having good thermal conductivity.

As described above, according to this embodiment, in the portion corresponding to the reinforcing plate 11, the heat radiation pipe 1 is formed by the end surface 11a of the reinforcing plate 11.
3 from being scratched or bent, it is also possible to prevent deterioration of heat conduction to the outer box 2 due to the reinforcing plate 11, and the reinforcing plate 1
The heat dissipation pipe 1 due to the step caused by the end 11a of
It is possible to prevent non-contact and floating of the inner flange 12d and the outer box 12 of 3, and the hinge fixing screw contacts and penetrates a part of the heat dissipation pipe 13 through the hinge attachment screw hole 11b of the reinforcing plate 11. The elasticity of the bent portion 13a allows the heat radiation pipe 13 to be securely connected to the outer box 12 behind the inner flange 12d.
Since the hot melt 10 can come into contact with the outer box 12, the heat is actively conducted to the outer box 12, and heat radiation to the outside air is improved. Furthermore, there is less heat conduction to the outer flange 12a, the folded flange 12b, and the inner two flange 12d, and the heat entering into the refrigerator can also be reduced.

Although hot melt 1o is applied in this example, the same effect can be obtained by using a tape of good thermal conductivity such as aluminum foil.

Effects of the Invention As described above, the present invention is arranged such that at least one side of the heat dissipation pipe is in contact with the rear surface of the double flange and the outer box,
Since the heat dissipation pipe is bent before reaching the end of the reinforcing plate, it prevents the heat dissipation pipe from coming into contact or floating due to the step of the reinforcing plate. This prevents holes from forming in some parts and allows the heat dissipation pipe to be elastically and reliably positioned in the outer box behind the inner flange, allowing the heat from the heat dissipation pipe to be efficiently conducted to the outer box and dissipated to the outside air. At the same time as the amount of heat increases,
The amount of heat conducted from the folded flanges and inner flanges and infiltrating into the refrigerator is suppressed, which not only improves heat dissipation efficiency, but also prevents damage and bending of the heat dissipation pipe, and also helps secure the pipe during work. 2 positioning can be done easily and the effect is excellent.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an outer box of a refrigerator showing an embodiment of the present invention, viewed from inside the refrigerator, FIG. 2 is a perspective view of the refrigerator shown in FIG. 1, and FIG. 3 is a perspective view of a conventional refrigerator. Figure 4 is B- in Figure 3.
FIG. 6 is a cross-sectional view taken along line C--C/ in FIG. 3 of another conventional example. 3... Inner box, 11... Reinforcement plate, 12.
...Outer box, 12a...Outer flange, 1
2b...Folded flange, 12d...
Inner flange, 13. Old... heat dissipation pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person11
-11th supplementary 5th grade ll mountain one end 12--one tato box 1 rl! J72m-Inner Jll flange 13--One side cutout. 2C 3-inner rectangle u ---one reinforced version! ? -Outer box 52 diagram 13-Heat dissipation vibrator. Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] An outer box with a double flange formed on the front opening edge, an inner box with a flange of the opening edge inserted into the double flange, a heat dissipation pipe for preventing dew formation, and a rear surface of the double flange of the outer box. At least one side of the heat dissipation pipe is arranged so as to contact the rear surface of the double flange and the outer box, and the heat dissipation pipe is bent before reaching the end of the reinforcing plate. A refrigerator characterized by: