JPS6135914Y2 - - Google Patents

Description

[Detailed description of the invention] This invention prevents outside air from entering the flange at the corner of the outer box of the refrigerator, causing condensation on the inner wall of the flange and the refrigerant pipe, and preventing the water droplets from flowing downward. The invention relates to a dew condensation prevention device for refrigerators.

As shown in FIG. 2, the refrigerator housing 1 is formed by fitting an inner box 3 made of synthetic resin into an outer box 2 made of decorative iron plate at a flange portion at the front edge thereof. That is, the outer box 2 is bent at a right angle at the front edge to form a front flange 4, and this front flange 4 is further bent inward by 180 degrees, and then further bent by 180 degrees to form an inner flange 5. Then, the front flange 4 and inner flange 5
An engagement groove 6 is formed between the two. After inserting the refrigerant pipe 7 into the engagement groove 6 as necessary, the flange 8 of the inner box 3 is press-fitted, and the gap between the inner and outer boxes 2 and 3 is filled with a heat insulating material such as urethane foam. A refrigerator case 1 is constructed.

In such a configuration, when outside air enters the engagement groove 6, dew condenses on the refrigerant pipe 7 and the inner wall surfaces of the flanges 4, 5, and 8, and the water droplets fall inside the engagement groove 6 and wet the floor. Or, the inside of the refrigerator may become wet. Therefore, conventionally, this engagement groove 6
The area was filled with a sealant to block out the outside air. In particular, as shown in FIG.
There was a large amount of outside air entering from the four corners of the top plate shown enlarged in the figure, and the structure of these parts was complicated, so the sealant could not fit in properly and a sufficient seal could not be obtained, and workability was extremely poor. .

The present invention was developed to solve the above-mentioned drawbacks, and when injecting and hardening the heat insulating material between the outer box and the inner box, a hole is made in the flange part and at the same time, a hole is made in the engagement groove. The outside air inlet is sealed by injecting heat insulating material into the tank. Therefore, there is no need for a special sealing material or sealing work as in the past, and a sufficient sealing effect can be obtained.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 3 and 4, reference numeral 2 denotes an outer box made by bending a decorative iron plate. This outer box 2 is bent inward at a right angle at its front edge to form a front flange 4. is folded back 180 degrees to a width of about 20 mm, and then folded back into a U-shape to form an inner flange 5, and an engagement groove 6 is formed between the front flange 4 and the inner flange 5.

Reference numeral 3 denotes an inner box molded from synthetic resin, and a flange 8 portion of the inner box 3 is press-fitted into the engagement groove 6 together with a refrigerant pipe 7 inserted as required. Then, between the outer box 2 and the inner box 3, urethane or the like is injected and hardened as a heat insulating material 9, but so that this urethane liquid also enters the engagement groove 6 and foams and hardens inside. A hole 10 is bored near the base of the inner flange 5. The position of this hole 10 is, for example,
As shown by the solid lines in Figure 5, there are 12 straight lines, 1 on each side of the top plate, 1 on the top and bottom of the side panels, 6 near the corners, and 6 in the middle of the side panels. do. The heat insulating material injected and hardened into the engagement groove 6 through the six holes 10 near the corners seals the engagement groove 6 at the corner where outside air easily enters, and seals the engagement groove 6 at the corner where outside air easily enters. Prevent outside air from entering the flange of the part. In addition, since the heat insulating material injected and hardened through the 12 holes 10 in the straight section fixes the refrigerant pipe 7 engaged in the engagement groove 6, special fittings for fixing the refrigerant pipe 7 are required. This becomes unnecessary, and costs can be reduced.

The size of this hole 10 depends on the urethane injection method.
It also varies depending on the location of outside air entry. for example,
As shown in FIG. 5, if we consider the case where the front of the refrigerator case 1 is facing upward and the bottom is tilted at a certain angle θ and urethane is injected from the x position on the bottom, the urethane is It flows into the low position part (top plate part) and gradually flows into the high position part (bottom plate part), so the internal pressure is especially high in the low position part and the viscosity of the foam is low, so it is sufficient to reduce the diameter of the hole 10. It enters into the engagement groove 6.
On the contrary, the diameter of the hole 10 is made large in the high position part because the internal pressure is low and the viscosity of the foam is high. Also, contrary to FIG. 5, with the front of the refrigerator case 1 facing downward,
The same applies when urethane is injected from the back plate or bottom. Further, the hole 10 may be formed not only at the position where the refrigerant pipe is inserted or at the front flange position, but also at a position where dew condensation may occur within the flange, such as on the back or side surface.

In the present invention, as described above, a hole is drilled in the inner flange near the corner of the outer box for injecting urethane foam or the like as an injected heat insulating material into the engagement groove. The insulating material injected and hardened into the joint groove can prevent outside air from entering, and can reliably prevent dew condensation inside the flange. Further, since there is no need to use special sealing materials or sealing work, work efficiency is greatly improved.

Furthermore, a hole was also drilled in the inner flange of the straight part of the outer box, and the refrigerant pipe was fixed with the heat insulating material injected into the engagement groove through this hole. No special metal fittings are required,
Workability is improved and costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the refrigerator casing, Fig. 2 is an exploded perspective view of the corner of the top plate of a conventional refrigerator, and Fig. 3 is a sectional view of the refrigerator casing according to the present invention.
FIG. 4 is a perspective view of the front lower part of the same as above, and FIG. 5 is an explanatory diagram of hole positions and injection of heat insulating material. 1... Refrigerator case, 2... Outer box, 3... Inner box,
4... Front flange, 5... Inner flange, 6... Engagement groove, 7... Refrigerant pipe, 8... Inner box flange, 9...
…Insulation material, 10…holes.

Claims (1)

[Scope of utility model registration request] A refrigerator case in which a refrigerant pipe is engaged with an engagement groove formed by a front flange and an inner flange of an outer box, a flange of an inner box is press-fitted, and a heat insulating material is injected and hardened between the outer box and the inner box. Condensation prevention for a refrigerator, characterized in that, in the body, a hole is bored in the inner flange near the corner and in the straight part of the outer box for injecting the injected heat insulating material also into the engagement groove. Device.