JP2577236Y2 - Insulated box structure in refrigeration equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a heat insulating box used in a refrigerator or the like, and more particularly to a connection structure between a heat insulating box and a refrigerator room provided therein.

[0002]

2. Description of the Related Art There are many examples in which a heat insulating box is used in a refrigerator. The reason is that, in a refrigeration apparatus, since the internal air is cooled to lower the temperature to a required temperature and the object is stored in a low temperature state, it is necessary to keep the air insulated from the external atmosphere.

[0003] For example, Japanese Patent Application Laid-Open No.
Japanese Patent No. 64 discloses a refrigerator which is an example of a heat insulating box whose inside is cooled by a refrigerator. The refrigerator of the prior application is intended for preserving fresh foods, and further has a refrigerator room of another structure in an insulated box. The publication states that
Although the detailed structure is not shown, generally, the heat-insulating box often has the structure shown in FIGS. 5 and 6
In the heat insulating box 1, a refrigeration box 2 defining a refrigeration room 18 for storing foods and the like is provided.

[0004] An evaporator, ie, a cooler 12, in which the refrigerant compressed and then condensed by the refrigerant compressor 11 evaporates, is installed at the back of the heat-insulating box 1, and the cooled air is supplied to the internal fan 1.
3 contacts the refrigerator box 2 from the outside and cools it. The moisture of the air condensed by cooling flows out from the drain hole 16. In particular, as shown in FIG. 6, the inner box 3 and the outer box 4 of the heat insulating box 1 are connected by a flat decorative frame 10. The inner box 3 is raised at the peripheral edge to form a step so that the above-mentioned condensed moisture does not flow out, and the outer box 4 is formed with a concave portion so as to receive an L-shaped decorative frame 14 of the refrigerator box 2 described later. ing. The L-shaped decorative frame 14 and the decorative frame 10 fixed to the opening edge of the refrigerator box 2 are fixed to the heat-insulating box 1 with screws or the like, but are made of resin and have a lower thermal conductivity than metal. Sign 1
Reference numeral 5 denotes caulking for filling a gap at the connection portion.

[0005]

In the above-mentioned conventional structure, a cool air space is defined between the inner box 3 of the heat insulating box 1 and the refrigerator box 2, and this cool air space is formed on the front surface of the outer box 4. (The rising frame on the right side in FIG. 6) and the decorative frame 14 that is flush with the
Since the decorative frame 14 is formed of a low heat conductive material, the cool air is easily transmitted to the outside. Further, since the decorative frame 14 is provided as described above,
The surface area of the cold air space defining surface exposed to the refrigerator compartment 18 was reduced, causing a decrease in the cooling efficiency of the refrigerator compartment. Accordingly, a main object of the present invention is to provide an insulated box structure in which cold heat in a cold air space is hard to escape to the outside. Another object of the present invention is to provide a heat-insulating box structure that not only makes it difficult for the cold heat in the cold air space to escape to the outside, but also makes it easy to dissipate the cold heat in the cold air space into the refrigerator compartment.

[0006]

In order to achieve the above-mentioned object, the heat insulating box structure of the present invention according to the first aspect comprises an inner box, an outer box, and a heat insulating material filled between them. And a thermal conductivity provided in a cool air space defined in the heat insulating box and defining a refrigerator compartment inside .
Refrigerator having a refrigerator box, and a door for opening and closing the front opening of the heat insulation box and the refrigerator compartment, a decorative frame is provided on the inner surface of the heat insulation box along the opening edge of the heat insulation box. The inner box and the outer box are arranged and insulated from each other, and an annular projection formed to project from the inner surface side of the heat insulating box body to the refrigerator compartment side. In the side surface, the opening edge of the refrigerator having good thermal conductivity is closely fixed at a position deeper than the opening edge of the outer box with respect to the door. According to the present invention, the opening edge of the refrigerator box is bent in an L shape and is exposed on the inner surface of the door. The annular projection is formed so as to protrude from the decorative frame screwed to the heat-insulating box body toward the refrigerator compartment, and is screwed to the opening edge of the refrigerator box at an upper end. Is preferred.

In the heat-insulating box body having the above-described structure, an annular projection formed from the inner surface side of the heat-insulating box body toward the refrigerator compartment side has an opening edge of the outer box on a side surface of the annular protrusion located on the door side. Refrigeration with good thermal conductivity at the back of the door
Refrigeration with good thermal conductivity because the opening edge of the box is fixed closely
Spaced as possible from the outer boxes opening edge of the box, cold heat conduction to the outside is reduced. Also, as described above, the annular protrusion and the heat
By connecting the opening edge of the good-conductivity refrigerator box to the opening edge and forming the opening edge in an L-shape, the heat transfer area of the cold air space on the side facing the door is increased.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which the same reference numerals indicate the same or corresponding parts. In FIG. 1, a compressor 11 is installed on an upper part of the heat insulating box 1,
It is connected to an evaporator or cooler 12 in the heat insulating box 1 via a refrigerant circuit (not shown). In the heat insulating box 1, a refrigerator box 2 is supported via a decorative frame described later, which defines a refrigerator room 18 therein. The front openings of the two refrigerating compartments 18 are provided with doors 19 of a heat-insulating structure which can be opened and closed by hinges or the like.
Is normally closed by the
Opened as shown. FIG. 4 is a perspective view showing a state in which one refrigerating box 2 is taken out to facilitate understanding of the structure.
Keep cold air inside.

Returning to FIG. 1, an internal fan 13 is provided in the upper part of the heat insulating box 1 to circulate the cool air cooled by the cooler 12, and the refrigeration box 2 made of a heat conductive metal plate is It is suitably cooled from the outside. That is, the heat insulation box 1 and the refrigerator box 2
Is a cold air space, and the cold air flowing through the space cools the refrigerator compartment 18 in the refrigerator box 2.
A drain hole 16 is provided at the bottom of the heat insulating box 1.
The water condensed by cooling is discharged. In the present embodiment, two refrigeration compartments 18 are provided. However, an appropriate number can be set according to the refrigeration capacity, size, and application.

In FIG. 2, which is an enlarged view of a portion indicated by an arrow II in FIG. 1, unlike the conventional step structure, the inner box 3 formed in a flat shape has a portion adjacent to the front surface 17 of the main body (see FIG. 4). And a flat main body 1 without a concave portion unlike the conventional structure.
7 is formed. The space between the inner box 3 and the outer box 4 is filled with a heat insulating material 20. The decorative frame 10 screwed to the outer box 4 and the inner box 3, that is, fixed with screws, is made of a resin that is a relatively low heat conductive material to prevent heat loss.
It has a letter-shaped cross section. The main projection (annular projection) 5 extends over the entire length of the decorative frame 10 and forms a ring as a whole.
The surface on the door 19 side (right rising surface in FIG. 2)
, A flange (opening edge) 7 of the refrigerator box 2 is fixed via a soft material 8 as a cushioning material, and is supported. The L-shaped flange 7 is attached to the annular main projection 5 at a position deeper than the door with respect to the opening edge of the outer box 4 as shown in FIG.

As shown in the exploded view of FIG. 3, a packing material 6 may be used in place of the soft material 8 as a cushioning material. In this manner, the refrigerator box 2 is brought into close contact with the decorative frame 10 and is screwed thereto as shown in the figure to block the leakage of cool air.
In addition, a low-height second projection, that is, a small projection 9 is formed on the decorative frame 10 near the front surface 17 of the main body, and the small projection 9 extends over the entire length like the main projection 5 to form an annular shape. A water recess is formed on the opposite side of the annular projection 5 with respect to the flange 7 described above. In this way, a kind of pool is formed between the main projection 5 and the small projection 9, and water droplets flowing out of the refrigerator compartment 18 are kept in this pool and do not flow directly to the front surface 17 of the main body. These water droplets do not become so large in nature, and may be wiped and cleaned as appropriate.

[0012]

According to the first aspect of the present invention, an outer box is formed on an annular projection formed from the inner surface of the heat-insulating box toward the refrigerator compartment, and on the side surface of the annular projection located on the door side. Refrigeration with good thermal conductivity at the back of the door from the edge of the opening
Since the opening edge of the box is closely fixed, the opening edge of the refrigerator box is separated from the outer box as much as possible, and the conduction of cold heat to the outside is reduced, and the cooling efficiency can be improved. Also,
As described in claim 2, when the annular projection is connected to the opening edge of the refrigerator box having good thermal conductivity , and the opening edge is formed in an L shape, it faces the door. The heat transfer area of the cold air space on the side is increased, and the cooling efficiency can be further improved. As described in claim 3, the annular projection is formed so as to protrude from the decorative frame screwed into the heat insulating box body to the refrigerator compartment side,
If the upper end is screwed to the opening edge of the refrigerator box, it provides a high-strength heat-insulating box structure that is resistant to bending loads into the refrigerator compartment and that suspends the refrigerator box above the heat-insulating box body. Can be.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a preferred embodiment of the present invention.

FIG. 2 is an enlarged partial cross-sectional view showing a main part indicated by an arrow II in FIG.

FIG. 3 is a partial exploded view showing a main part of another embodiment.

FIG. 4 is a partially exploded perspective view of the embodiment of FIG. 1;

FIG. 5 is a vertical sectional view showing a conventional one.

FIG. 6 is a partially enlarged sectional view of FIG. 5;

[Explanation of symbols]

1 ... Insulated box, 2 ... Refrigerated box, 3 ... Inner box, 4 ... Outer box, 5 ...
Main projection (annular projection), 7: flange (opening edge of refrigerator box), 10: decorative frame, 18: refrigerator compartment, 19: door body, 20
... insulation.

Claims (3)

(57) [Scope of request for utility model registration] 1. An insulation box made of an inner box, an outer box and a heat insulating material filled between them, provided in a cool air space defined in the insulation box, and a refrigerating chamber inside. In a refrigeration apparatus having a thermally conductive refrigeration box to be defined, and a door for opening and closing a front opening of the heat insulation box and the refrigerator compartment, the heat insulation box is provided along an opening edge of the heat insulation box. A decorative frame is disposed on the inner surface of the body, the inner box and the outer box are insulated and connected to each other, and an annular projection formed by projecting from the inner surface side of the heat insulating box body to the refrigerator compartment side is provided on the door side. In the side surface of the annular projection located at a position closer to the door than the opening edge of the outer box, the opening edge of the refrigerator having good thermal conductivity is fixed closely. Heat insulation box structure in the refrigerator. 2. The opening edge of the refrigerator box has an L-shape.
The heat-insulating box structure according to claim 1, wherein the heat-insulating box body is bent to be exposed on an inner surface of the door. 3. The refrigerator according to claim 2, wherein the annular protrusion is formed so as to protrude from the decorative frame screwed to the heat-insulating box toward the refrigerator compartment, and has an upper end screwed to the opening edge of the refrigerator box. The heat insulating box structure according to claim 1 or 2, wherein the heat insulating box structure is combined.