JPH03183886A - Door body for refrigerator, etc. - Google Patents

Abstract

PURPOSE:To make it possible to set optionally the thermal insulating capacity of a transparent section by laminating a plurality of transparent film frame bodies to form closed spaces as insulating layers, and filling foamable urethane thermal insulating materials into parts other than the closed spaces. CONSTITUTION:A plurality of transparent film frame bodies 14... that the peripheral surface of transparent film 12 is borne on internal frame 13 and 13 are laminated, they are held between an external plate 15 and a window board 18, and closed spaces are formed as a plurality of thermal insulating layers. After that, excepting the closed spaces, foamable urethane thermal insulating materials 10 are filled among the peripheral surfaces of the external plate 15, internal plate 8 having a notched hole 7, facing frame 9 and internal frame 8. The thickness of the closed space is properly adjusted to set optionally the thermal insulating capacity of a transparent section.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a door body of a refrigerator or the like.

2. Description of the Related Art Conventionally, there have been transparent door bodies of refrigerators, etc., which are made of a glass plate, as disclosed in Japanese Utility Model Publication No. 47-9724, for example, as transparent door bodies that allow the inside of the refrigerator to be seen through. For example, as shown in FIG. 3, as a conventional general structure, a plurality of transparent glass plates 1 are laminated using a frame 2 for fixing the lamination and a Nubesa 3 for adjusting the spacing, and the laminated transparent glass A plurality of sealed spaces 4 formed between the plates 1 are formed as a heat insulating layer.

Then, an outer plate 6 provided with a cutout hole 5 that contacts the lamination fixing frame 2, an inner plate 8 provided with a cutout hole 7 that contacts the transparent glass plate 1, and outer peripheries of the outer plate 6 and the inner plate 8. Makeup surrounding 1
? 9, and the outer plate 6 and inner plate 8 except for the sealed space 4.
It is formed by a foamed urethane heat insulating material 10 filled between the frame 9 and the decorative frame 9, and a gasket 11 for sealing the inside of the refrigerator.

Problems to be Solved by the Invention However, in a transparent door body having such a structure, in order to improve the heat insulation performance of the door body, it is necessary to increase the number of transparent glass plates 1 and spacers 3 for adjusting the distance. Since it is necessary to increase the number of layers, the weight of the door body increases significantly, the number of assembly steps becomes more complicated, and there is a problem that the glass can break.

The present invention solves the above-mentioned conventional problems,
The purpose is to provide a transparent door body which has a small increase in weight even when the number of heat insulating layers is increased and is simple to assemble.

Means for Solving the Problems In order to solve the above problems, the door body of a refrigerator, etc. of the present invention has the following features:
By stacking a plurality of transparent film frames in which the outer periphery of the transparent film is supported by an inner frame, a sealed space is formed as a plurality of heat insulating layers.
Inner plate with cutout holes.

A foamed urethane insulation material is filled between the decorative board and the outer peripheral surface of the inner frame.

Effects According to the present invention, the number of laminated layers in the sealed space can be set by the above-described configuration, and the transparent part can be given any heat insulation performance. The transparent part is a stack of transparent film frames in which the outer periphery of the transparent film is supported by an inner frame.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. Incidentally, components that are the same as those of the prior art are given the same numbers and detailed explanation thereof will be omitted.

In the figure, reference numeral 12 denotes a transparent resin film whose surface is coated to prevent heat ray reflection. The transparent film 12 has a substantially U-shaped cross section, and its outer periphery is welded and supported to an inner frame 13 made of resin without wrinkles or sag, thereby forming a transparent film frame 14. In this embodiment, six sets of the transparent film frames 14 are sequentially superimposed on the outer plate 15 made of a transparent plate using the approximately U-shaped cross section of the inner frame 13, and the transparent films 12 are interposed between each other. The sealed spaces 16 that can be formed are stacked. 1 is a sealing foam material, and only the inner frame 13' that contacts the polymerized transparent film frame 14 and the outer panel 16 is housed within the approximately U-shaped cross section to ensure sealing performance with the outer panel 15. ing.

Reference numeral 18 denotes a transparent window plate made from planutic material, whose outer periphery is welded and supported by the inner frame 13 and further polymerized on the five sets of polymerized transparent film frames 14, thereby forming the outer panel 15 and the transparent film. The close contact space 16 of the heat insulating air layer formed with the frame body 14 has six layers. A transparent window plate 18 fixed to the inner frame 13 is brought into contact with an inner plate 8 provided with a cutout hole 7 so as to close the cutout hole 7. 9 is a decorative frame that surrounds and supports the outer periphery of the inner plate 8 and the outer plate 16; Outer panel 15. The space surrounded by the decorative frame 9 and the six sets of polymerized inner frames 13, excluding the sealed space 16, is filled with foamed urethane heat insulating material 10. 11 is a gasket that seals the inside of a refrigerator or the like.

With this configuration, the door bodies of refrigerators etc. are formed.
The transparent outer panel 15. Transparent film 12. Transparent window plate 18° 6-layer sealed space 16. It is possible to see through the inside of the refrigerator through the notch hole 7 of the inner plate 8.

Generally, the pitch of the sealed space 16 that serves as a heat insulating layer is an important factor for heat insulating performance, and if the pitch is made large,
When the gas convection in the closed space 16 is large, the amount of heat transferred due to convection is large 9, but on the contrary, the amount of heat transferred due to conduction of the gas itself is reduced.

Conversely, if the pitch is made smaller, the amount of heat transfer due to convection decreases and the amount due to conduction increases. Therefore, the pitch of the sealed space 16 is determined by considering the balance between convection and conduction.
It is also necessary to change it depending on other conditions (temperature inside and outside the refrigerator, etc.). In this embodiment, by preparing a plurality of inner frames 13 that differ only in the cross-sectional height, the pitch can be easily changed. Another possible means of improving the heat insulation performance of the door body is to use multiple layers, but the conventional multilayer structure made of glass plates has weight limitations and is limited to a two-layer structure at most. However, with the transparent film structure of the present invention, even with a six-layer structure, it is possible to reduce the weight to about half that of a two-layer glass structure, and the heat insulation performance can be improved.
However, it can be made lighter.

Further, unlike the conventional method, parts such as a stacking fixing frame and spacing adjusting parts are not required, and the number of parts is small and assembly is easy. Moreover, since there is no need to provide a cutout hole for viewing through the outer panel 16, there is no leakage from the surface outer frame of the foamed urethane insulation material, and the appearance is good, and there is no need to consider restrictions on design. good.

Effects of the Invention As is clear from the above explanation, the present invention provides an arrangement in which the outer periphery of the transparent window panel is formed into an inner frame between an outer panel made of a transparent plate and an inner panel in which a cutout hole is provided opposite to the outer panel. A transparent plate frame supported by a transparent plate frame and a plurality of transparent film frames in which the outer periphery of the transparent film is supported by an inner frame are laminated at a predetermined pitch, sandwiched between the outer plate and the inner plate, and foamed. By fixing with urethane heat insulating material, the following effects can be obtained, and the implementation effects are significant.

■ Even if it is multi-layered to improve insulation performance, it is made of transparent film, making it much lighter than conventional glass.

■ The thickness of the sealed space can be easily adjusted by preparing inner frames with different cross-sectional heights, and the insulation performance of the transparent part can be set as desired.

■ As explained in the conventional example, parts such as spacers for adjusting the distance are not required, and assembly is easy, resulting in an inexpensive configuration.

■ Since there is no need for cut holes in the outer panel, there is no leakage of the foamed urethane insulation material from the surface, and there are no restrictions in terms of design.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part of a door body of a refrigerator, etc., showing an embodiment of the present invention, Fig. 2 is a perspective view of main parts of Fig. 1, and Fig. 3 is a door body of a refrigerator, etc. showing a conventional example. FIG. 7... Notch hole, 8... Inner plate, 9...
... Decorative frame, 10... Urethane foam insulation material,
12...Transparent film, 13...Inner frame, 14...Transparent film frame, 16...
・Outer panel, 18...Window panel.

Claims (1)

[Scope of Claims] An outer panel made of a transparent plate, an inner panel having a cutout hole facing the outer panel, a decorative frame surrounding the outer periphery of the outer panel and the inner panel, and a cutout hole in the inner panel. a window panel made of a transparent plate that is closely attached to cover the window from the outer panel side, a transparent film, an inner frame that supports the outer periphery of the transparent film, and a plurality of transparent film frames made of the inner frame and the transparent film. A plurality of transparent film frames are laminated so that the transparent film surfaces are spaced apart from each other by a predetermined distance, and the transparent film frames made of the laminated plurality are attached to an outer panel and a window panel through a predetermined distance. A multilayer sealed space is formed between the outer panel and the window panel by sandwiching the foam between the outer panel, the inner panel, the decorative frame, and the outer peripheral surface of the plurality of inner frames, excluding this sealed space. Door bodies of refrigerators, etc. filled with urethane insulation.