JPS6191478A - Heat-insulating box body - 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.

The structure of the conventional example and its problems The conventional example will be explained with reference to Figures 3 and 5. 01 is the refrigerator body, 2 is the outer box, and 3 is the inner box.
A foamed heat insulating material 4 is filled in between to form a heat insulating box. In addition, the front edge opening of the outer box 2, which is divided by the partition wall 5 into a freezing compartment 6 at the top and a refrigerating compartment 7 at the bottom, is formed by roll former molding into an outer flange 2a and a back surface of this outer flange 2a. The folded back flange 2b, the bent portion 2c, and the folded back flange 2
an inner flange 2d extending parallel to b at a predetermined distance;
It forms a double flange consisting of The inner box 3 has its opening flange 3a inserted into the double flange of the outer box 2 via the sealing member 8. 09 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 refrigeration cycle includes a compressor 10, a main radiator 11, a capillary tube 12, an evaporator 13, and a compressor 1o.
- Main radiator 12 - Heat radiator pipe 9 - Capillary tube 12 - i Generator 1
3 - Connected to the compressor 10 in a sequentially annular manner by piping.

In such a configuration, normally, not all of the heat radiated by the heat radiation pipe 9 inserted into the double flange is radiated to the outside through the outer box 2, but only 20 to 3 of the total heat radiation amount.
o% 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 9 is conducted through the inner flange 2d, and a path is formed in which it enters the freezer compartment 6 and the refrigerator compartment 7 through the insulation material 4, which has a narrow gap with the cooling compartment. This is to be done.

In addition, the bent portion 2 of the double flange that the heat radiation pipe 9 comes into contact with
Since C and the outer box 2 are not in complete contact with each other and a gap is created, resulting in a non-contact state, it is not possible to sufficiently increase the heat dissipation ratio in the direction of the outer box 2, which is originally desired, and the double flange Since the heat radiation ratio in the direction becomes high, the inner flange 2 described above
The amount of heat entering the cooling chamber through d was not suppressed.

Purpose of the Invention In view of the above-mentioned points, the present invention aims to suppress the rate of heat intrusion into the cooling chamber of the heat dissipation pipe and improve the heat dissipation efficiency. By applying a thermally conductive plastic resin or thermoplastic resin across the outer case side plate and the double flange, the heat radiation ratio toward the outer case side plate is increased and the heat radiation efficiency is improved.

Description of examples An embodiment of the present invention will be described below 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 the figure, 14 is a thermally conductive plastic resin (hereinafter referred to as "sheen") or a thermoplastic resin (hereinafter referred to as "hot melt").
It is applied across the outer box 2 and the bent portion 2c.

In such a configuration, the condensation heat released from the heat dissipation pipe 9 is first mainly conducted to the bent portion 2c of the double flange,
Next, the heat is conducted to the folded flange 2b and the inner flange 2d, but at this time, a part of the heat conducted through the inner flange is induced into the outer box 2 via the thermally conductive scene or the hot melt 14. , heat is radiated to the outside from the outer box 2. Furthermore, since the gap between the outer box 2 and the bent portion 2C of the double flange is also filled with the thermally conductive sheet or hot melt, the condensation heat in the highest temperature state conducted to the bent portion 2C is transferred to the thermally conductive sheet or hot melt. The heat is actively conducted to the outer box 2 via the conductive sheet or hot melt and radiated to the outside. As a result, the amount of heat that enters the cooling chamber through the inner flange 2d of the double flange is suppressed, and at the same time, heat conduction to the outer box 2 is promoted, increasing heat radiation efficiency.

Effects of the Invention As is clear from the configuration described above, the present invention has a heat dissipation pipe disposed within a double flange formed at the front opening edge of the outer box, and a heat dissipation pipe extending between the outer box and the inner flange of the double flange. Since it is coated with a plastic resin or thermoplastic resin with good conductivity, the condensation heat of the heat dissipation pipe is attracted by the plastic resin or thermoplastic resin with good thermal conductivity and is actively conducted to the outer box. This increases the amount of heat dissipated to the outside, and at the same time suppresses the amount of heat that conducts through the inner flange of the double flange and enters the cooling chamber, improving heat dissipation efficiency.
It is possible to effectively utilize heat dissipation pipes in a very simple manner and at low cost, and its effects are outstanding.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a refrigerator showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A/ (. Perspective view, Figure 4 is the 3rd
A sectional view taken along the line BB/ in the figure, and FIG. 5 is a refrigeration cycle piping diagram of the refrigerator. 2... Outer box, 2c... Bent part, 2d...
... White 1 flange, 3 ... Inner box, 4 ...
...Foam insulation material, 9... Heat dissipation pipe, 14
...Plastic resin or thermoplastic resin. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] an outer box in which a double flange is formed on the front opening edge; an inner box in which a flange at the opening edge is inserted into the double flange; and a heat dissipation pipe attached to a bent end portion of the double flange;
A heat insulating box body made of a foamed heat insulating material filled between the outer box and the inner box, and coated with a thermally conductive plastic resin or thermoplastic resin so as to span the inner flange of the double flange and the outer box. .