JPH0445377A - Refrigerator door - Google Patents

Abstract

PURPOSE:To prevent clouding at a hydrophilic film from occurring on an inner transparent plate even if a dew formation occurs on the film and enable an inside part of a refrigerator to be seen by a method wherein the hydrophilic film is laminated on an inside surface of the transparent plate facing to an inside part of the refrigerator. CONSTITUTION:A plurality of closed spacings 4 formed between piled-up transparent plates 1a, 1b and 1c are formed as thermal insulating layers. A hydrophilic film 10 is adhred to a surface of the transparent plate 1c of the refrigerator. As the hydrophilic film, a film composed of polymer having hydrophilic or water absorbing characteristics can be used. With such an arrangement, the refrigerator door shows that the transparent plate 1c within the refrigerator has a uniform wetting at the surface even under a dew formation due to the fact that the hydrophilic film 10 for use in prohibiting cloudy state therein also during a time in which the items in the refrigerator are being opened after opening the door and thus the door is not clouded at its surface. In addition, even if the transparent plate 1c is cracked, the transparent plate 1c is not splashed due to the fact that the clouding preventive hydrophilic film 10 is adhered.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a door body of a refrigerator.

In particular, the present invention relates to a refrigerator door having a transparent part through which the interior of the refrigerator can be seen.

[Prior Art] Conventionally, a transparent door body of a refrigerator through which the interior of the refrigerator can be seen has been made of a glass plate as disclosed in Japanese Utility Model Publication No. 47-9724. In addition, for example, as shown in FIG. 2 (cross-sectional view of main parts), as a general structure of such a conventional door body, transparent plates 1a, 1b, such as transparent plastic such as polymethacrylate or polystyrene, or transparent glass plate, etc.
lc with stacking fixing frame 2 and interval adjustment spacer 3,
A plurality of transparent plates 1 are laminated with gaps between them.
a % l b N 1 c A plurality of sealed spaces 4 formed between each other are formed as a heat insulating layer, and an outer frame plate 5 that abuts the lamination fixing frame 2 and the lamination fixing frame 2
The outer frame plate 5 and the inner frame plate 6 are in contact with the inner side of the refrigerator, the decorative frame 7 that surrounds the outer periphery of the outer frame plate 5 and the inner frame plate 6, and the sealed space 4. It is formed by a foamed polyurethane heat insulating material 8 filled between the frame plate 6, the decorative frame 7, and the laminated fixing frame 2, and a gasket 9 for sealing inside the refrigerator.

[Problems to be Solved by the Invention] However, with a transparent door body having such a structure, when the door body is opened, dew tends to accumulate on the inner side of the transparent plate 1c on the inside of the refrigerator. For a while because the transparent plate becomes cloudy,
The drawback was that it was not possible to see inside the refrigerator.

That is, every time a customer opens the door at a store to take out refrigerated or frozen foods displayed inside the refrigerator, water vapor in the air adheres and condenses, causing the transparent door to become (
It has the disadvantage that it cannot fully fulfill its role as a display for refrigerated or frozen foods.

The present invention solves the above-mentioned conventional drawbacks, and aims to provide a transparent door body in which the inner transparent plate does not become cloudy even when the refrigerator door is opened.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a heat insulating door body for a refrigerator in which a plurality of transparent plates are stacked with gaps, and the periphery thereof is sealed with a frame. To provide a door body for a refrigerator in which a hydrophilic film is laminated on the inner side surface of the transparent plate on the inside of the refrigerator among a plurality of transparent plates.

[Function] With the above-described configuration, the present invention has a hydrophilic transparent film laminated on the surface of the transparent plate on the inside of the refrigerator, so that the transparent plate on the inside of the refrigerator does not become cloudy even when the door is opened. do not have.

[Example] An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a sectional view of essential parts of the refrigerator door body of the present invention. 1st
As shown in the figure, a transparent plate 1a such as a transparent plastic such as polymethacrylate or polystyrene or a transparent glass plate
, lbs or ICs are stacked with gaps between them using a stacking fixing frame 2 and a spacer 3 for adjusting the spacing, and the stacked transparent plates 1 a have a plurality of seals formed between the slbs or ICs. The space 4 is formed as a heat insulating layer, and an outer frame plate 5 that abuts the stack fixing frame 2, and an inner frame plate 6 that abuts the part of the stack fixing frame 2 on the inside of the refrigerator;
Between the outer frame plate 5, the inner frame plate 6, the decorative frame 7, and the stacking fixing frame 2, except for the decorative frame 7 surrounding the outer periphery of the outer frame plate 5 and the inner frame plate 6, and the sealed space 4. It is formed by a foamed polyurethane heat insulating material 8 filled with a gasket 9 for sealing inside the refrigerator. Reference numeral 10 denotes a hydrophilic film, which is pasted on the inside surface of the transparent plate 1c inside the refrigerator.

The hydrophilic film may be any film made of a transparent material that can achieve the anti-fogging purpose of the present invention, and a film made of a hydrophilic or water-absorbing polymer can generally be used.

Specific examples of materials constituting such films include polyvinyl alcohols (including partially saponified polyvinyl acetate and copolymers thereof), polyamides (particularly those containing -
Those with a large proportion of NHCO- bonds are preferred because they have higher hydrophilicity. ), polyacrylic acids, polyvinylpyrrolidones, polyalkylene glycols, polyetheramides, polyesteramides, sodium sulfoisophthalate copolyester or other hydrophilic polyesters, celluloses, acetates, and the like.

Sono and others in general 1. ．． -COOH, -OH, -NH2゜NH
CONH2, -(OCH2CH2)n--303M, -
Examples include polymers having groups or bonds such as 0303M and -COOM (wherein M represents an alkali metal).

Among these, an appropriate one may be selected and used depending on the purpose and required characteristics.

Furthermore, as the film material, it is not necessarily necessary to use only a film formed from a hydrophilic material as described above.
Generally, films that are not hydrophilic enough to achieve the anti-fogging effect referred to in the present invention as they are, or films that are hydrophobic, such as commonly used polyester films such as polyethylene terephthalate, polyethylene naphthalate, and polypropylene. The surface of a film such as a polyolefin film such as a film is coated with the hydrophilic polymer, a film of the hydrophilic polymer is laminated, or a surface hydrophilic processing method such as plasma discharge treatment is applied to produce a film. The use of a hydrophilic film as referred to in the present invention also includes the use of a hydrophilic film by subjecting its surface to hydrophilic treatment.

In addition, it is preferable to use a film that can be biaxially stretched as a film, desirably stretched in the biaxial direction to obtain high strength.

The thickness of the hydrophilic film is not particularly limited, but is usually 10
~100 μm, preferably 30 to 70 μm.

In such a structure, the transparent plate 1c on the inside of the refrigerator is covered with the anti-fogging hydrophilic film 10 even when the door body of the refrigerator etc. is opened and items inside the refrigerator are taken out. Therefore, even if there is condensation, the surface gets wet evenly and does not become cloudy.

Therefore, the inside of the refrigerator can be seen even immediately after closing the door body.

In addition, even if something inside the refrigerator hits the transparent plate 1c when the door is closed and the transparent plate IC breaks, the transparent plate IC will not scatter because the anti-fogging hydrophilic film 10 is attached. Never.

In addition, since the hydrophilic film 10 is easily colored compared to the transparent plates 1a, lb, or 1c, it is possible to make the transparent door body colorful by making the whole transparent and colorful, or by making it partially transparent or opaque with a colored pattern. It has the advantage that the design can be easily diversified.

In the above embodiment, three transparent plates were used, but it is of course possible to use two or four or more transparent plates.

[Effects of the Invention] As is clear from the above explanation, the present invention provides a heat insulating door for a refrigerator in which a plurality of transparent plates are stacked with gaps between them, and the periphery of the transparent plates is sealed with a frame. A hydrophilic film is laminated on the inside side of the transparent plate on the inside of the refrigerator, so even when you open the refrigerator door and take out items inside the refrigerator, Even if dew condensation forms on the hydrophilic film on the transparent plate, the surface will be uniformly wetted and will not become cloudy. Therefore, there is an effect that the inside of the refrigerator can be seen even immediately after closing the door body.

Also, items inside the refrigerator may hit the transparent plate when the door is closed,
Another advantage is that even if the transparent plate breaks, it will not scatter because the film is laminated.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a door body of a refrigerator showing an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of a door body of a refrigerator showing a conventional example. 1 a, 1 bz 1 c... Transparent plate, 2... Lamination fixing frame, 3... Spacer, 4... Closed space, 5
... Outer frame board, 6... Inner frame board, 7... Decorative frame, 8.
...Polyurethane foam insulation material, 9...Gasket, 1
0...Hydrophilic film.

Claims (1)

[Claims] In a heat-insulating door body for a refrigerator in which a plurality of transparent plates are stacked with gaps and the periphery thereof is sealed with a frame, the inside surface of the transparent plate on the inside of the refrigerator compartment among the plurality of transparent plates is hydrophilic. Refrigerator door body made of laminated film.