JPS6244308Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an insulating wall used in refrigerators, etc., in which a vacuum insulating material is embedded in a foam insulating material, and in particular, it is intended to easily attach and support the vacuum insulating material.

In general, if the cooling system of refrigerators equipped with a compressor, cooler, etc. is the same, the wall thickness of the refrigerator, that is, the thickness of the foam insulation layer made of polyurethane, etc. The amount of heat absorbed by the refrigerator is reduced, the cooling efficiency of the refrigerator itself is improved, and power consumption is therefore reduced. However, as the wall thickness increases, there are disadvantages such as a decrease in the effective internal volume of the refrigerator, an increase in the installation area of the refrigerator due to the increase in the door portion, and an increase in the weight of the refrigerator itself. In order to eliminate this drawback, a vacuum heat insulating material containing silica gel or the like is used as a substitute for a foam heat insulating material such as polyurethane, which has a higher heat insulating property than the foam heat insulating material. In general, the thermal conductivity of foam insulation materials such as polyurethane is
The thermal conductivity of vacuum insulation materials such as silica gel is approximately 0.009Kcal/mh℃.
The thermal conductivity is approximately 1/2 that of foam insulation materials such as polyurethane. Therefore, by embedding a vacuum insulation material in the layer of foam insulation material such as polyurethane,
It has been proposed to use vacuum insulation and foam insulation in combination, which can reduce the thickness of the refrigerator door wall, increase the effective internal volume, reduce the installation area by reducing the external volume of the door, and reduce the weight of the refrigerator itself. We can expect a decrease in

Conventionally, when a vacuum insulation material is used in combination with a foam insulation material as described above, it has been considered to attach and fix the vacuum insulation material sealed in a bag-shaped vacuum pack with tape, adhesive, or the like. However, when pasting it on a door panel, a lot of tape and adhesive are required, and the pasting process is difficult and time-consuming, causing high costs.Furthermore, it is weak to fix with tape, adhesive, etc., and the door panel cannot be attached to the door sash. If the tape or adhesive is peeled off during insertion,
When a heat insulating material such as polyurethane is foamed, problems such as the vacuum heat insulating material peeling off from the door panel and moving within the heat insulating space layer and not fully functioning as a vacuum heat insulating material can be foreseen.

The present invention solves the above-mentioned drawbacks by fixing the vacuum insulation material placed between the inner and outer panels using the reinforcing plate of the frame that connects the inner and outer panels. The objective is to shorten installation time and reduce costs, and also to prevent peeling of tapes, adhesives, etc. attached when conventional door panels are inserted into door sashes, and movement of vacuum insulation material that occurs when foaming.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a refrigerator main body, which consists of an inner box 2 made of synthetic resin by vacuum forming or the like, an outer box 3 made of iron plate, and a foamed heat insulating material 4 between the boxes 2 and 3. Reference numeral 5 denotes a dividing wall that divides the inside of the refrigerator into upper and lower parts, defining a freezing compartment 6 in the upper part and a refrigerating compartment 7 in the lower part. Reference numeral 8 denotes a cooler housed within the partition wall 5, and together with a compressor 9, a condenser 10, etc., constitutes a well-known refrigeration cycle. Again 1
1 is a door, which includes a door panel 12 as an outer panel, a door sash 13 as a frame, and a door shelf 1 as an inner panel.
4 and a reinforcing plate 15 for reinforcing the frame 13.
Then, the outer plate 12 and the inner plate 14 are fixed to the frame 13, and a reinforcing plate 15 is press-fitted into a reinforcing plate mounting portion 13a forming a recess. 16 is a vacuum insulation material;
Consisting of a paper bag 17 containing a powder filler 18 such as silica gel inside, and a film 19 such as a polyethylene sheet covering the outer periphery of the paper bag 17, the periphery 19a of this film 19 is a mounting portion that is heat-sealed by evacuating the inside. A welded portion 19b is formed. The reinforcing plate 15 is made of a metal plate and has a U-shaped cross section.
3a, and also use elastic force to attach the mounting parts 15 at both ends.
The end surfaces of a and 15b are in strong contact with each other.

Therefore, when attaching the vacuum insulation material 16 to the inside of the door 11, first, as shown in FIG. Then, the reinforcing plate 15 is inserted into the recess 13a of the frame 13, which is the reinforcing plate attachment part, and is attached. Finally, foam insulation material 4 is filled as shown in FIG. In addition, vacuum insulation material 1
To briefly explain the manufacturing method of No. 6, first, a powder filler 18 such as silica gel is filled into a paper bag 17 and then dried well, and then inserted into a bag formed with a film 19 or between two films. The periphery 19a of the film 19 is welded in a vacuum atmosphere. Further, although the above embodiment is applied to a door, the present invention is not limited to this, and can also be applied to a wall of a prefabricated refrigerator.

In this way, the present invention includes an inner panel, an outer panel, a frame that connects the inner and outer panels and has a reinforcing plate attachment part, and a reinforcement provided at the frame and the reinforcing plate attachment part of the frame. a board; a vacuum insulating material having a mounting portion on the outer periphery attached to the reinforcing board and disposed between the inner and outer boards and the frame;
This vacuum insulation material is equipped with foam insulation material filled between the inner panel, outer panel, and frame, and the vacuum insulation material can be installed with a simple structure using reinforcing plates, eliminating the need for tape, adhesive, etc. Furthermore, when foaming insulation materials such as polyurethane, there is no movement due to foaming pressure.
Furthermore, since the welded part of the film is used as the attachment part, it has great practical effects, such as stable attachment that does not adversely affect the vacuum section and the ability to maintain heat insulation performance.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a refrigerator with a door incorporating an embodiment of the present invention, Figure 2 is a sectional view showing the vacuum insulation material attached to the door, and Figure 3 is a sectional view of the vacuum insulation material. be. 12... Outer plate, 13... Frame body, 13a... Reinforcement plate attachment part, 14... Inner plate, 15... Reinforcement plate, 16
...Vacuum insulation material.

Claims (1)

[Scope of claims for utility model registration] (1) An inner panel, an outer panel, a frame that connects the inner and outer panels and has a reinforcing plate attachment portion, and reinforcement provided at the reinforcing plate attachment portion of this frame. A board, a vacuum insulation material with a mounting part on the outer periphery attached to the reinforcing board and arranged between the inner and outer panels and the frame, the vacuum insulation material, the inner board,
An insulated wall that includes an outer panel and a foam insulation material filled between the frame. (2) The heat insulating wall according to claim 1, wherein the welded part of the film which is the outer covering of the vacuum heat insulating material is the attachment part.