JPH0325712B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to the prevention of deformation of a refrigerator door, particularly a front plate that constitutes the front surface of the door.

[Conventional technology]

Figures 4 to 6 show conventional examples of refrigerator doors. In the figures, 1 indicates the door body (hereinafter referred to as the body);
Reference numeral 2 denotes an outer plate forming the front surface of the main body 1, 3 an outer peripheral frame forming the outer periphery of the main body 1 and supporting the outer plate 2, 4 a handle, and 5 a foam heat insulating material filled inside the main body 1 ( (hereinafter referred to as a heat insulating material), 6 is a mold release piece made of polyethylene sheet or the like to prevent the heat insulating material 5 from adhering to the outer surface plate 2, and 7 is a side part of a pocket portion attached to the back surface of the outer peripheral frame 3.

With the structure described above, the mold release piece 6 does not have a flat surface due to gas pockets and cavities that occur when the heat insulating material 5 foams and solidifies, so the outer plate 2 may partially deform or during operation. The heat insulating material 5 partially shrinks to prevent the outer plate 2 from being partially deformed.

[Problem that the invention seeks to solve]

As described above, in the conventional door body 1, the outer panel 2 and the heat insulating material 5 are separated from each other by the mold release piece 6, and the heat insulating material 5 made of foamed resin and the outer panel 2 made of a steel plate are different. Since the shrinkage rates are different, when the temperature inside the refrigerator becomes low, due to the difference in the shrinkage rates of the insulation material 5 and the outer panel 2,
As shown by arrow A in FIG. 6, the heat insulating material 5 contracts together with the mold release piece 6, and as a result, the outer surface plate 2 is greatly curved outward, resulting in a bulge in the center.

This invention was made in order to solve the above-mentioned problems, and aims to provide a refrigerator door that does not cause deformation of the outer panel during filling with insulation material and during operation. .

[Means for solving problems]

The refrigerator door according to the present invention is constructed by overlapping an outer plate covering the front surface and a reinforcing plate in contact with a heat insulating material with steel plates.

[Effect]

In this invention, the strength of the outer plate is increased by overlapping the outer plate and the reinforcing plate with steel plates, thereby suppressing expansion and contraction during filling of the foamed heat insulating material in contact with the reinforcing plate and due to temperature changes inside the refrigerator.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. In the figures, the same reference numerals indicate the same or equivalent parts, and 8 is in contact with the back side of the outer plate 2, and both sides are connected to the outer plate 2 through the recess 3a of the outer peripheral frame 3, and are made of steel plates fixed to the front side of the heat insulating material 5. This is a formed reinforcing plate.

With the structure described above, the outer plate 2 is reinforced by being overlapped with the reinforcing plate 8, so the expansion and contraction of the foamed heat insulating material 5 fixed to the reinforcing plate 8 is suppressed, and the outer plate 2 is not deformed.

FIG. 2 shows another embodiment of this invention,
Reference numeral 9 denotes a reinforcing plate whose external dimensions are smaller than that of the outer plate 2. Even with this configuration, similar effects can be obtained, and the material cost of the reinforcing plate 9 can be reduced.

FIG. 3 shows still another embodiment of the present invention, in which the outer peripheral frame 3 and the outer plate 2 are integrally constructed, and the same effect can be obtained and the number of parts can be reduced. There is an effect that can be done.

〔Effect of the invention〕

As explained above, in this invention, the outer panel is reinforced by overlapping the outer panel covering the front surface of the door and the reinforcing plate in contact with the foam heat insulating material with steel plates. It is possible to suppress the expansion and contraction of the foam insulation material due to temperature changes inside the refrigerator, and has the effect of preventing deformation of the outer panel of the refrigerator.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention;
FIG. 2 is a cross-sectional view showing another embodiment, FIG. 3 is a cross-sectional view showing still another embodiment, FIGS. 4 to 6 show a conventional example, and FIG. 4 is a perspective view. FIG. 5 is a cross-sectional view, and FIG. 6 is an explanatory diagram showing a state in which the outer plate is curved. In the figures, the same reference numerals indicate the same or corresponding parts, 2 is an outer plate, 5 is a foamed heat insulating material, and 8 is a reinforcing plate.

Claims (1)

[Claims] 1. In a refrigerator door filled with foam insulation material,
A refrigerator door characterized in that it is constructed by overlapping an outer plate that covers the front surface and a reinforcing plate made of a steel plate and in contact with the foamed heat insulating material. 2. The refrigerator door according to claim 1, wherein the size of the reinforcing plate in contact with the foam insulation material is smaller than the size of the outer surface plate.