JPS61116264A - 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 Industrial Application The present invention relates to a refrigerator comprising a pipe-on-sheet type heat exchanger.

Conventional Structure and Problems In recent years, the cooler of direct cooling type refrigerators has been placed outside the inner box in order to effectively utilize the internal volume.

Generally, this type of refrigerator has a bent molding provided on the outer surface of an outer box 1 of the refrigerator and an inner box 2 made of synthetic resin disposed at a distance from the outer box 1, as shown in FIGS. 3 to 6. refrigerant pipe 3 and inner box 1. It consists of a foamed heat insulating material 4 filled between outer boxes 2.

The inner box 2 and the refrigerant pipe 3 constitute a pipe-on-sheet type heat exchange wall.

Next, a method for attaching the refrigerant pipe 3 to the outer surface of the inner box 2 will be explained. As shown in FIG. 4, a fixing plate 6 for fixing the refrigerant pipe 3 is placed on the bottom surface of the vacuum mold 6 of the inner box 2, the refrigerant pipe 3 is temporarily fixed to this, and then the inner box is vacuum formed. 2 is vacuum-formed into a predetermined shape, and the periphery of the refrigerant pipe 3 is covered with the inner box 2 and fixed. However, the inner box 2 wraps around the outer periphery of the refrigerant pipe 3 and is fixed, but the amount of wrapping is important, and if the inner box 2 wraps around the entire circumference, the inner box 2
If the thickness of the refrigerant tube 3 is stretched extremely thin and tears occur or there is little entrainment, the refrigerant pipe 3 will not be fixed to the inner box 2, resulting in instability, and this unstable contact will greatly affect the cooling performance. There was a drawback to that.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention has been developed to prevent the inner box from being torn by dogs getting caught in the refrigerant pipes of the inner box without using adhesive tape such as aluminum foil, and to provide a stable contact area of the refrigerant pipes. It provides a refrigerator that can be obtained by

Composition of the Invention In order to achieve this object, the present invention provides a lip integrally with the refrigerant pipe from a position beyond the maximum cross-sectional diameter of the refrigerant pipe, and divides the outer periphery of the refrigerant pipe into two by this lip, on the longevity side; The inner box is integrally fixed to the outside facing the inner box, and the lip provided on both sides of the refrigerant pipe prevents the refrigerant pipe from being caught in the inner box when the inner box is fixed to the inner box, and also provides stable heat exchange contact. This is to obtain the area.

DESCRIPTION OF EMBODIMENTS The following description will be based on an embodiment shown in FIGS. 1 and 2. An outer box 2 made of a metal plate or synthetic resin is an inner box made of synthetic resin; A foamable heat insulating material 4 is filled in the space between the inner box 2 and the inner box 2 to form a heat insulating box. A refrigerant pipe 3 made of a good heat conductor such as aluminum is provided on the outside of the inner box 2.
is integrally fixed to the inner box 2 to form a heat exchange wall. Then, the refrigerant pipe 3 starts from a position beyond the maximum cross-sectional diameter.
A pair of lips 3' facing each other and extending to opposite sides and integral with the refrigerant pipe 3 are provided. The lip 3' divides the refrigerant pipe 3 into two, and the longevity side a and the lip 3' are opposed to each other on the outside of the inner box 2.

That is, the synthetic resin sheet is attached by vacuuming the synthetic resin sheet after attaching it to the fixing plate 6 as shown in FIG.

As described above, according to this embodiment, by simultaneously molding the inner box 2 and the refrigerant pipes 3 with the long life circumferential side a facing the outside of the inner box 2, the inner box 2 has the maximum cross section of the refrigerant pipes 3. The refrigerant pipe 3 can be integrally fixed to the inner box 2 by covering the circumference of the refrigerant pipe 3 beyond its diameter.

Furthermore, by providing a pair of lips 3' integrally with the refrigerant pipe 3, the amount of wrapping around the refrigerant pipe 3 due to vacuum forming of the inner box 2 is restricted, so that the inner box 2 can be made extremely thin. It is possible to prevent the inner box 2 from being stretched and torn or punctured, and it is also possible to maintain a stable contact area, thereby eliminating variations in cooling performance. In addition, since the lip 3' increases the contact area with the inner box 2, the length of the refrigerant pipe can be shortened.

Effects of the Invention As described above, the present invention prevents the refrigerant from flowing into the inner box by providing lips on both sides of the refrigerant pipe in the diametrical direction, while integrally fixing the refrigerant pipe to the outside of the inner box at the same time as forming the inner box. This can prevent the inner box from being stretched thinner and prevent the inner box from tearing. In addition, the lip of the refrigerant pipe is provided at a position exceeding the maximum diameter, and the long-life circumferential side divided into two by this lip is integrally molded with facing the outside of the inner box. becomes possible,
Not only is adhesive tape not required, but the lip increases the contact area with the inner box, so shortening the length of the refrigerant tube is cheaper, improves workability, reduces man-hours, and improves stability. It has the advantage of securing a large heat exchange area, and the effects of its implementation are impressive.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of a refrigerator showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the main parts of FIG. 1, and FIG. 3 is a cross-sectional view of the main parts of a conventional refrigerator. FIG. 4 is a vertical cross-sectional view of a conventional inner box vacuum forming mold, and FIG. 5 is an enlarged cross-sectional view of the main part of FIG. 3. 1...Outer box, 2...Inner box, 3...
...Refrigerant pipe, 3'... Lip, 4... Foam insulation material. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 3 Figure 4

Claims (1)

[Claims] A refrigerator in which an inner box made of synthetic resin is vacuum-formed and a refrigerant pipe is integrally fixed to the outside of the inner box to form a pipe-on-sheet type heat exchange wall, and a foam insulation material is filled in the space between the inner box and the outer box. , a rib is provided integrally with the refrigerant pipe on both sides in the diametrical direction from a position exceeding the maximum cross-sectional diameter of the refrigerant pipe, and the long outer circumferential side where the outer circumference of the refrigerant pipe is divided into two by the rib and the rib are A refrigerator characterized in that the inner box faces the outside and is integrally attached to the front.