JP2002062038A - Heat insulating door body for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating door body for refrigerator which has the same warp suppressing effect as that obtained when metallic reinforcing members are incorporated into upper and lower door caps even when the reinforcing members are not incorporated. SOLUTION: The door body for refrigerator is constituted by positioning an inner door plate composed of a thin resin plate oppositely to a metallic outer door plate and putting the top and bottom door caps on the upper and lower edges of the outer and inner door plates astride the space between the door plates, and then, injecting and foaming an expandable heat insulating material into and in the space formed of the outer plate, inner plate, and door caps. The putting sections of the top and bottom caps on the outer door plate are closed with members which suppress the intrusion of the foamed heat insulating material and are composed of thin film bodies over the full width of a refrigerator so as to prevent the intrusion of the foamed heat insulating material into the putting sections.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating door for a refrigerator in which a heat insulating material is injected and foamed in a space formed by a door outer plate, a door inner plate, and a door upper / lower cap.

[0002]

2. Description of the Related Art FIG.
This will be described with reference to FIGS. 3 is a perspective view of the back surface of the heat insulating door for the refrigerator, FIG. 4 is a plan view of the refrigerator, and FIG.
It is a Z line sectional view. As shown in FIG. 3, foamed heat insulating material is injected and foamed into a space formed by a door outer plate 1 made of a steel plate, a door inner plate 2 made of a thin resin sheet, and door upper and lower caps 3 and 4 made of a synthetic resin. The three are joined together.

[0003] In the heat insulating door for a refrigerator having such a structure, when the refrigerator is operated during operation, the side of the door inner plate 2 is cooled and kept at a low temperature, and the side of the door outer plate 1 is kept at a relatively high temperature. become. At this time, a difference in shrinkage occurs between the foamed heat insulating material near the door inner plate 2 side and the door outer plate 1 side due to a temperature difference between the two and a difference in the thermal expansion coefficient of the material. A warping force is generated so as to expand toward the door outer plate 2. This warping force is applied to the door outer plate 1, the door inner plate 2, and the door upper and lower caps 3 and 4.
The larger the respective parts are, the stronger they are adhered to the foam insulation 9.

Along with this, the door upper and lower caps 3 and 4 are warped. Due to the warping of the door upper and lower caps 3 and 4,
As shown by the solid line in FIG. 4, products that deteriorate the close contact between the cold air sealing gasket 6 and the refrigerator main body 5 that are mounted in the immediate vicinity, lower the cold air blocking effect, and cause dew condensation on the external part due to air flow. It leads to functional failure.

In order to cope with this inconvenience, a metal reinforcing member 7 as shown in FIG. 5 is incorporated into the door upper and lower caps 3 and 4 so as to provide rigidity capable of resisting the warping force caused by the above-mentioned cause. The above-mentioned warpage is suppressed.

[0006]

The conventional heat-insulating door for a refrigerator is constructed as described above, and is used to suppress the warpage of the door upper and lower caps 3, 4 due to the temperature difference between the inside and the outside of the door that occurs during operation of the refrigerator. The metal reinforcing member 7 is incorporated in the upper and lower caps 3 and 4, which contributes to an increase in manufacturing cost and an increase in product weight of the heat insulating door for refrigerator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. Even if a metal reinforcing member to be incorporated in a door cap is omitted, a door cap similar to the case where the reinforcing member is incorporated is provided. An object of the present invention is to provide a heat insulating door for a refrigerator having a warp suppressing effect.

[0008]

According to the present invention, there is provided a heat insulating door for a refrigerator, comprising: a metal door outer plate; and a door inner plate made of a thin resin sheet disposed opposite to the door outer plate. A door upper and lower cap made of a synthetic resin mounted between the door outer panel and the door inner panel, and injecting foamed heat insulating material into a space formed by the door outer panel, the door inner panel, and the door upper and lower caps. In a foamed heat insulating door body for a refrigerator, the foam heat insulating material enters the fitting portion when the foam heat insulating material is injected, over the refrigerator width direction at the fitting portion between the door outer plate and at least one of the caps above or below the door. It is closed by a foamed heat insulating material intrusion suppressing member using a thin film so as not to prevent it.

Also, a metal door outer plate, a door inner plate made of a thin resin sheet disposed opposite to the door outer plate, and a composite mounted between the door outer plate and the door inner plate. Door upper and lower caps made of resin, and a door insulating plate, a refrigerator insulating door body formed by injecting and foaming a foam insulating material into a space formed by the door inner plate and the door upper and lower caps. Using a non-adhesive thin film having a surface that suppresses the door skin surface from adhering to the foam insulation material across at least one of the cap mounting portions near the top or bottom of the door in the width direction of the door skin. It is covered with a foam heat insulating material adhesion suppressing member.

[0010] Further, both the foam heat insulating material intrusion suppressing member and the foam heat insulating material adhesion suppressing member are used.

In addition, the area covered by the foam heat insulating material adhesion suppressing member is 100 m from the door cap surface in the refrigerator product height direction.
m.

Further, as the material of the foam heat insulating material adhesion suppressing member, a paper tape coated with a non-adhesive surface or a resin stretched tape such as polypropylene is used.

Further, the foamed heat insulating material adhesion suppressing member is extended to the foamed heat insulating material intrusion suppressing member, and both functions are shared by one foamed heat insulating material adhesion suppressing member.

Further, a metal door outer plate, a door inner plate made of a thin resin sheet disposed opposite to the door outer plate, and a composite mounted between the door outer plate and the door inner plate. Door upper and lower caps made of resin, and a door insulating plate, a refrigerator insulating door body formed by injecting and foaming a foam insulating material into a space formed by the door inner plate and the door upper and lower caps; At least one of the right and left corners of the fitting portion with the upper or lower cap of the door is closed by a foam heat insulating material intrusion suppressing member using a thin film so that the foam heat insulating material does not enter when the foam heat insulating material is injected. .

Further, a metal door outer plate, a door inner plate made of a thin resin sheet disposed opposite to the door outer plate, and a composite mounted between the door outer plate and the door inner plate. Door upper and lower caps made of resin, and a door insulating panel, wherein the door insulating panel is formed by injecting and foaming a foamed insulating material into a space formed by the door outer panel, the door inner panel, and the door upper and lower caps. The vicinity of the left and right corners is covered with a foam heat insulating material adhesion suppressing member using a non-adhesive thin film body for suppressing the adhesion to the foam heat insulating material.

The range covered by the foamed heat insulating material adhesion suppressing member is about 100 mm to 350 mm in the height direction of the refrigerator product from the door cap surfaces at the left and right corners of the door outer plate surface.

Further, a foam heat insulating material adhesion suppressing member using a non-adhesive thin film is provided, which suppresses the door outer plate from adhering to the foam heat insulating material covering the vicinity of the left and right corners. The member is extended to the foam heat insulating material intrusion suppressing member, and both functions are shared by one foam heat insulating material adhesion suppressing member.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show the first embodiment. FIG. 1 is a longitudinal sectional view showing the vicinity of the lower side of the heat insulating door for a refrigerator, and FIG. 2 is a transverse sectional view thereof. In the figure, 1 is a door outer plate made of a steel plate, 2 is a door inner plate made of a synthetic resin disposed to face the door outer plate 1, and 4 is a synthetic resin made up of a lower side of a heat insulating door for a refrigerator. The lower door cap 4a is a thin film member which is a foam heat insulating material intrusion suppressing member.
4b is a non-adhesive thin film which is a foam heat insulating material adhesion suppressing member, and is formed of a non-adhesive thin film such as a tape for preventing the foamed heat insulating material 9 from entering the space between the door skin 1 and the door outer plate 1. The surface applied to prevent adhesion to the heat insulating material 9 is a thin film such as a non-adhesive tape. The non-adhesive thin film member 4b is provided on the entire width of the door in the refrigerator width direction as shown in FIG.

The area covered with the non-adhesive thin film member 4b is about 100 mm in the height direction of the refrigerator product from the surface of the cap 4 below the door. Of course, the same applies to the cap on the door. In addition, the door outer plate 1 and the door inner plate 2 other than the thin film member 4a and the non-adhesive thin film member 4b, and the door lower cap 4 are integrally connected via a foamed heat insulating material 9.

As the material of the non-adhesive thin film 4b, for example, a paper tape whose surface is coated with a non-adhesive substance, or a stretched resin tape such as polypropylene is used. Of course, the same material may be used for the thin film member 4a.

With the above structure, the door inner plate 2 and the foamed heat insulating material 9 near the door inner plate 2 are cooled,
Even if the size contracts and a dimensional difference occurs between the door skin 1 and the opposite side (comparative high-temperature side), the adhesive strength between the door skin 1 and the foam insulating material 9 is weak. There is no warping force applied to the lower door cap 4 disposed at the lower part of the body, and warpage can be prevented. Of course, the same can be said for the warpage of the door cap.

As a result, even if the metal reinforcing member previously incorporated in the door upper and lower caps is abolished, the warpage generated in the door upper and lower caps is greatly suppressed, and as a result, the gasket for cold air sealing can maintain sufficient close contact with the refrigerator body. It is possible.

Embodiment 2 FIG. In the first embodiment, the thin film member 4a and the non-adhesive thin film member 4b are used, but the non-adhesive thin film member 4b is extended to the thin film member 4a so that the functions of the two members are not changed. One member of the adhesive thin film member 4b may also be used.

Embodiment 3 FIG. In the first embodiment, the thin film member 4a and the non-adhesive thin film member 4b are provided over the entire refrigerator width direction. However, the thin film member 4a and the non-adhesive thin film member 4b are not provided near the center in the refrigerator width direction. Even if it is provided, the effect of suppressing the warpage of the door upper and lower caps can be obtained. In this case, the area covered by the non-adhesive thin film member 4b is defined as a dimension 1 in the refrigerator product height direction from the door upper and lower cap surfaces at the left and right corners of the door outer panel surface.
It should be about 00 mm to 350 mm.

[0025]

According to the heat insulating door for a refrigerator according to the present invention, the heat insulating member is inserted into the heat insulating material when the foamed heat insulating material is injected over the width of the area where the door outer plate and at least one of the caps above or below the door are fitted. By blocking the foam insulation material with a foam insulation material penetration suppression member using a thin film so that the foam insulation material does not enter, the formation of an adhesive layer between the door outer plate and the door cap can be prevented, and it works due to the temperature difference between the inside and outside of the door. By suppressing the warping force of the door cap, it is possible to omit the metal reinforcing member used for suppressing the warping of the cap in the conventional technology, thereby reducing the manufacturing cost and weight of the heat insulating door for a refrigerator. Has the effect.

Further, the surface of the door outer plate that suppresses the adhesion of the door outer plate surface to the foamed heat insulating material extends across the vicinity of at least one of the cap mounting portions above and below the door in the width direction of the door outer plate. By covering with a foam heat insulating material adhesion suppressing member using a non-adhesive thin film body, it is possible to prevent the formation of an adhesive layer between the door outer plate and the foam heat insulating material near the door upper and lower caps, and it works due to the temperature difference between the inside and outside of the door By suppressing the warping force of the door upper and lower caps, it is possible to omit the metal reinforcing member used for suppressing the warpage of the cap in the conventional technology, thereby reducing the manufacturing cost and weight of the heat insulating door for the refrigerator. And so on.

Further, by using both the foam heat insulating material intrusion suppressing member and the foam heat insulating material adhesion suppressing member, an adhesive layer between the door outer plate and the door cap and an adhesive layer between the door outer plate and the foam insulating material near the door cap are provided. Can be prevented, the metal reinforcing member used for suppressing the warpage of the cap can be omitted, and the manufacturing cost and the weight of the heat insulating door for a refrigerator can be reduced.

Further, the number of parts can be reduced by extending the foamed heat insulating material adhesion suppressing member to the foamed heat insulating material intrusion suppressing member and using both functions as one foamed heat insulating material adhesion suppressing member.

Further, even when the foamed heat insulating material intrusion suppressing member is provided near the left and right corners of the fitting portion between the door outer plate and at least one of the caps above or below the door, the adhesion between the door outer plate and the door cap is not limited. The formation of layers can be prevented, and the metal reinforcing member used for suppressing the warpage of the cap can be omitted. This has the effect of reducing the manufacturing cost and reducing the weight of the heat insulating door for a refrigerator.

Further, even if the foamed heat insulating material adhesion suppressing member is provided near the left and right corners of the door outer panel, it is possible to prevent the formation of an adhesive layer between the door outer panel and the door cap, and to suppress the warpage of the cap. The metal reinforcing member can be omitted, which has the effect of reducing the manufacturing cost and the weight of the heat insulating door for a refrigerator.

[Brief description of the drawings]

FIG. 1 is a view showing the first embodiment, and is a longitudinal sectional view near the lower side of a heat insulating door for a refrigerator.

FIG. 2 shows the first embodiment, and is a cross-sectional view near the lower side of the heat-insulating door for a refrigerator.

FIG. 3 is an external perspective view of the back surface of a conventional heat insulating door for a refrigerator.

FIG. 4 is an external side view of a conventional heat-insulating door mounted on a refrigerator body.

FIG. 5 is a sectional view taken along line ZZ of FIG. 3;

[Explanation of symbols]

1 door outer plate, 2 door inner plate, 4 door lower cap, 4a thin film, 4b non-adhesive thin film, 9 foam insulation.

Claims (10)

[Claims] 1. A door outer plate made of metal, a door inner plate made of a resin thin plate disposed opposite to the door outer plate, and mounted between the door outer plate and the door inner plate. Door upper and lower caps made of synthetic resin, and wherein a foam insulating material is injected and foamed into a space formed by the door outer plate, the door inner plate, and the door upper and lower caps. Foaming using a thin film so that the foamed heat insulating material does not enter the fitted portion when the foamed heat insulating material is injected over the refrigerator width direction of the fitted portion of the door outer plate and at least one of the caps above or below the door. A heat insulating door for a refrigerator, which is closed with a heat insulating material intrusion suppressing member. 2. A door outer plate made of metal, a door inner plate made of a thin resin sheet disposed opposite to the door outer plate, and mounted between the door outer plate and the door inner plate. Door upper and lower caps made of synthetic resin, and wherein a foam insulating material is injected and foamed into a space formed by the door outer plate, the door inner plate, and the door upper and lower caps. A surface that suppresses the door skin surface from adhering to the foamed heat insulating material over the width direction of the door skin over the vicinity of at least one of the cap mounting portions above or below the door in the door skin. A heat insulating door for a refrigerator, wherein the heat insulating door is covered with a foam heat insulating material adhesion suppressing member using a sticky thin film. 3. The door outer panel surface is bonded to the foam heat insulating material over the vicinity of at least one of the cap mounting portions above or below the door in the door outer panel in the width direction of the door outer panel. The surface for suppressing the occurrence of heat is covered with a foam heat insulating material adhesion suppressing member using a non-adhesive thin film body.
The insulated door body for a refrigerator as described in the above. 4. A range covered by the foamed heat insulating material adhesion suppressing member in a direction from the door cap surface to the refrigerator product height direction.
3. The heat-insulating door for a refrigerator according to claim 2, wherein the thickness is about 0 mm. 5. The heat insulating door for a refrigerator according to claim 2, wherein a material of the foam heat insulating material adhesion suppressing member is a paper tape coated with a non-adhesive surface or a resin stretched tape such as polypropylene. body. 6. The foam heat insulating material adhesion suppressing member is extended to the foam heat insulating material intrusion suppressing member, and both functions are shared by the foam heat insulating material adhesion suppressing member. Insulated door for refrigerator. 7. A door outer plate made of metal, a door inner plate made of a thin sheet of resin disposed opposite to the door outer plate, and mounted between the door outer plate and the door inner plate. Door upper and lower caps made of synthetic resin, and wherein a foam insulating material is injected and foamed into a space formed by the door outer plate, the door inner plate, and the door upper and lower caps. The vicinity of the left and right corners of the fitting portion of the door outer plate and at least one of the caps above or below the door is in a foamed heat insulating material intrusion suppression member using a thin film so that the foamed heat insulating material does not enter when the foamed heat insulating material is injected. An insulated door for a refrigerator characterized by being closed. 8. A door outer plate made of metal, a door inner plate made of a resin thin plate disposed opposite to the door outer plate, and mounted between the door outer plate and the door inner plate. Door upper and lower caps made of synthetic resin, and wherein a foam insulating material is injected and foamed into a space formed by the door outer plate, the door inner plate, and the door upper and lower caps. A heat insulating door body for a refrigerator, wherein a surface of a door outer panel for preventing the vicinity of the left and right corners from adhering to the foam heat insulating material is covered with a foam heat insulating material adhesion suppressing member using a non-adhesive thin film. 9. A range of 100 mm to 350 m in a height direction of a refrigerator product from the door cap surface at the left and right corners of the door outer plate surface in a range covered by the foam heat insulating material adhesion suppressing member.
The insulated door for a refrigerator according to claim 8, wherein the length is about m. 10. A foam heat insulating material adhesion suppressing member using a non-adhesive thin film body for preventing the door outer plate from adhering to the foam heat insulating material covering the vicinity of the left and right corners thereof, 8. The foam heat insulating material adhesion suppressing member is extended to the foam heat insulating material intrusion suppressing member, and both functions are shared by the foam heat insulating material adhesion suppressing member.
The insulated door body for a refrigerator as described in the above.