JPH0861837A - Heat insulation box - Google Patents

Abstract

PURPOSE: To satisfactorily fill an expanded heat insulating material in a heat insulation box in which a vacuum heat insulation panel and the expanded heat insulating material are used as a heat insulation member. CONSTITUTION: A vacuum heat insulation panel 9 is disposed in an outer shell 2 and a stock solution dividing member 13 is disposed in a space part 10 corresponding to an injection port 12. Once a sock solution of an expanded heat insulating material is injected from the injection port 12, the stock solution is uniformly divided in two directions through the stock solution dividing member 13, and further an expanded heat insulating material 11 can be filled in the space part 10 in the outer shell 2 uniformly to the utmost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating box body having a structure using a vacuum heat insulating panel and a foam heat insulating material as a heat insulating material between an outer box and an inner box.

[0002]

2. Description of the Related Art In recent years, for example, a heat insulating box used for a refrigerator has been considered in which a vacuum heat insulating panel excellent in heat insulating performance is used as a heat insulating material. This is an outer shell made by combining an outer box made of steel plate and an inner box made of plastic, and a vacuum heat insulation panel is installed on the main wall part inside this outer shell, and the vacuum A structure is adopted in which the remaining space where the heat insulating panel is arranged is filled with a foamed heat insulating material such as polyurethane foam by so-called foaming in situ.

When filling the foamed heat insulating material, a stock solution of the foamed heat insulating material is injected from an injection port formed in a predetermined portion of the outer shell. Then, the undiluted solution hits the end surface of the vacuum heat insulating panel facing the inlet, then flows into the space in two directions, and foams to fill the relatively narrow space. The filled foam insulation will solidify.

[0004]

However, the above-mentioned configuration has the following problems. That is,
In the case of filling foam insulation material, when the stock solution of foam insulation material is injected from the inlet, it is easy to accumulate when the first stock solution hits the vacuum insulation panel, and two directions after the stock solution hits the vacuum insulation panel. There is a risk that the density of the foam insulation filled will become uneven, or in some extreme cases, the foam insulation will not be filled because it is not evenly divided and tends to be biased to one side. .

Therefore, an object of the present invention is to provide a heat insulating box which can be filled well with a foam heat insulating material in a structure using a vacuum heat insulating panel and a foam heat insulating material as the heat insulating material.

[0006]

According to the present invention, a vacuum heat insulating panel is provided inside an outer shell formed by combining an outer box and an inner box, and an injection port formed in the outer shell. It is configured by filling the foamed heat insulating material in the space other than where the vacuum heat insulating panel is arranged by foaming the stock solution injected from, and has an opening in the front, and up, down, left and right,
And a heat insulating box body having a heat insulating wall at the back, at least in the space portion in the outer shell corresponding to the injection port, the undiluted solution of the foamed heat insulating material injected from the injection port. It is characterized in that a stock solution branching member for branching in two directions is provided (Claim 1).

In this case, it is preferable that the undiluted solution branch member has a flow path for guiding the flow of undiluted solution.

The injection port may be arranged at a portion of the outer shell corresponding to the rear corner (Claim 3), or at the portion of the outer shell corresponding to the rear corner. It can be arranged both on the front side and on the part corresponding to the corner (claim 4).

Further, in the space filled with the foamed heat insulating material, the foamed heat insulating material which is injected and foamed from the injection port on the rear side of the outer shell and the foaming which is injected and foamed from the injection port on the front side. It is preferable that the partition member is arranged at least at a part of the portion where the heat insulating material abuts (claim 5).

[0010]

According to the heat insulation box body of the first aspect, when the undiluted solution of the foamed heat insulating material is injected from the injection port, the first undiluted solution is uniformly branched in each direction by the undiluted solution branching member.
The stock solution can be satisfactorily flown in each direction, and as a result, the foamed heat insulating material can be filled in the space in the outer shell as uniformly as possible.

According to the heat-insulating box of the second aspect, since the undiluted solution branch member has the flow path, the undiluted solution can flow more smoothly. Further, according to the heat insulating box body of claims 3 and 4, it is possible to efficiently fill the space portion with the foamed heat insulating material.

According to the fifth aspect of the present invention, there is provided a foam insulating material which is foamed by being injected from the rear inlet of the outer shell and a foam which is foamed by being injected from the front inlet by the partition member. Since the heat insulating material can be separated, it is possible to prevent one foamed heat insulating material from interfering with the filling of the other foamed heat insulating material.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a heat insulating box of a refrigerator will be described below with reference to FIGS. First, in FIGS. 2 and 3, the outer shell body 2 of the heat insulating box body 1 is configured by combining an outer box 3 made of steel plate and an inner box 4 made of plastic, and an opening 5 is formed on the upper surface in the drawings. It has a box shape with.

Inside the outer shell body 2, a ceiling portion 2a, left and right side portions 2b, a bottom portion 2c, and a back portion 2d of the outer shell body 2 are provided.
In each of the outer box 3 and the inner box 4, a ceiling vacuum insulation panel 6, side vacuum insulation panels 7 and 7, a bottom vacuum insulation panel 8 and a back vacuum insulation panel 9 each having a rectangular plate shape. It is arranged so as to be sandwiched between them. These vacuum heat insulation panels 6, 7, 8 and 9 are provided on the inner surface of the outer box 3 or the inner box 4 respectively.
It is attached to the outer surface of the adhesive with an adhesive. In this case, vacuum insulation panels for ceiling, sides, and bottom 6,
The front end faces of 7 and 8 (upper end faces in FIGS. 2 and 3) are in contact with the inner surface of the outer shell 2.

Further, inside the outer shell 2, the outer shell is provided around the vacuum insulating panel 9 for the back and between the vacuum insulating panels 6, 7 and 8 for the ceiling, the side and the bottom. The space portion 10 is formed at a portion corresponding to the corner portion of 2.
The space 10 is filled with a foamed heat insulating material 11 made of foamed polyurethane, for example. The space portions 10 communicate with each other, and the foamed heat insulating material 1 filled in the space portions 10
No. 1 has a shape as shown in FIG. Therefore, the heat insulating box 1 is configured to have the opening 5 on the front surface and the heat insulating walls on the upper, lower, left, and right sides.

The space 2 of the outer shell 2 communicates with the central portion of the rear corner (the lower corner in FIGS. 2 and 3) of the outer box 3 in the bottom 2c of the outer shell 2. The injection port 12 is formed. Then, as shown in FIGS. 1 and 6, a stock solution branching member 13 made of, for example, plastic is disposed in the space 10 corresponding to the inlet 12.

As shown in FIG. 5, the stock solution branching member 13 has one cylindrical inlet portion 14 and two cylindrical inlet portions 14.
It has a T-shape with individual outlets 15 and 15,
The inside is used as the flow path 16. In this case, the inner diameter of the inlet portion 14 is set to 20 mm to 50 mm. A projecting piece-shaped branch portion 17 is formed in a central portion between the two outlet portions 15 in the flow path 16. As shown in FIG. 6, the stock solution branching member 13 having such a configuration has the space portion 10 with the inlet portion 14 fitted to the inlet 12 and fixed to the outer box 3 or the back vacuum heat insulating panel 9. It is installed in.

As the material of the stock solution branching member 13, a material having a good heat insulating property is preferable, and paper such as cardboard paper may be used in addition to plastics such as polypropylene and polyethylene.

Now, the procedure for filling the foamed heat insulating material 11 will be described. First, the vacuum heat insulation panels 6 to 9 are arranged in the outer shell body 2, and the stock solution branching member 13 is arranged in the space portion 10 such that the inlet portion 14 of the raw liquid branching member 13 is fitted into the inlet 12. (See Figure 6).

Then, with the opening 5 of the outer shell 2 facing upward (state of FIGS. 2 and 3), the inlet 12 side (bottom 2c).
The side) is slightly inclined so as to be higher, and in this state, a stock solution of foamed heat insulating material (not shown) is injected from the injection port 12.

Then, as shown by the arrow in FIG. 6, the undiluted solution passes from the inlet portion 14 of the undiluted solution branching member 13 through the flow path 16 and is equally divided into two left and right directions by the branching portion 17 and the outlets on both sides. Each of the parts 15 and 15 flows into the space part 10. Then, the stock solution is foamed so that it is filled in the relatively narrow space 10. Finally, as shown in FIG. 1, the foamed heat insulating material 11 is also filled around the stock solution branching member 13. The filled foam insulation 11 is solidified. As a result, the filling of the foamed heat insulating material 11 into the outer shell body 2 is completed.

According to such a first embodiment, the outer shell 2
Since the undiluted solution branching member 13 is disposed in the internal space 10 at a position corresponding to the injection port 12, when the undiluted solution of the foamed heat insulating material is injected from the injection port 12, the first undiluted solution is undiluted solution 13. As a result, it is possible to branch in two directions evenly, the undiluted solution can be satisfactorily flown in two directions, and it becomes possible to fill the foamed heat insulating material 11 into the space portion 10 as uniformly as possible.

7 to 10 show a second embodiment of the present invention. This second embodiment differs from the above-mentioned first embodiment in the following points. That is, inside the outer shell 2, the space portion 10 is formed also on the front side (upper side in FIGS. 7 and 8) of the vacuum heat insulating panels 6, 7, 8 for the ceiling, the side portions, and the bottom portion. Has been done. With such a configuration,
There is a possibility that the foam heat insulating material 11 cannot be sufficiently filled up to the space 10 on the front side only by injecting the stock solution from the injection port 12 on the rear side.

Therefore, in the second embodiment, the outer shell is also formed in the center of the front corner of the outer box 3 in the bottom 2c of the outer shell 2 (the upper corner in FIGS. 7 and 8). The injection port 18 communicating with the space 10 in the body 2 is formed, and the stock solution branching member 13 is arranged in the space 10 corresponding to the injection port 18.

Further, in this case, in the space portion 10 filled with the foamed heat insulating material 11 in the outer shell 2, between the vacuum heat insulating panel 8 for the bottom portion and the vacuum heat insulating panels 7, 7 for the side portions. As shown in FIG. 10, a partition member 19 made of, for example, a plastic plate is provided on the part side (upper side in FIG. 7).
Is fixed in place.

Now, in the above structure, the foamed heat insulating material 11
In the case of filling in, the vacuum insulation panels 6 to 9 and the stock solution branching members 13 and 1 in the outer shell body 2 as in the first embodiment.
3 with the opening 3 of the outer shell 2 facing upward (the state of FIG. 7 and FIG. 8), the inlets 12 and 18 are slightly inclined so as to be higher, and the pouring is performed in this state. A stock solution of foam insulation (not shown) is injected through inlets 12 and 18.

Then, the undiluted solution injected from the injection port 12 on the rear side (lower side) is left and right by the undiluted solution branching member 13.
While being evenly divided in each direction and flowing in the space portion 10, the undiluted solution injected from the front side (upper side) injection port 18 is also equally divided into two left and right directions by the undiluted solution branching member 13. Each of them flows in the space portion 10, and the stock solution thereof is filled in each space portion 10 by foaming.

At this time, since the partition members 19 are arranged on the upper portions on both sides of the bottom vacuum heat insulating panel 8, the partition member 19 and the foamed heat insulating material 11 which is injected from the injection port 12 on the rear side to foam. It is possible to separate the foamed heat insulating material 11 that is injected and foamed from the injection port 18 on the front side, and prevent one foamed heat insulating material 11 from interfering with the filling of the other foamed heat insulating material 11. You can

Also in the second embodiment as described above, the stock solutions injected from the injection ports 12 and 18 can be satisfactorily branched in two directions, respectively, and the foam heat insulating material 11 can be filled in the space 10 as uniformly as possible. It will be possible.

The partition member 19 is not limited to plastic and may be paper, and is not limited to a plate-shaped member, and as shown as a modification of the partition member in FIG.
The block-shaped partition member 20 may be used.

Further, the stock solution branching member is not limited to the shape shown in FIG. 5, but may be modified as shown in FIGS. 12 to 15. That is, the undiluted solution branching member 21 shown in FIG. 12 is a first modified example, and the inlet portion 14 and the outlet portion 15 have a rectangular tubular shape. The stock solution branching member 22 shown in FIG. 13 is a second modified example, and is not cylindrical but has an open upper surface. The undiluted solution branching member 23 shown in FIG. 14 is a third modification, has a T-shape having a projecting piece-shaped branching portion 24, and has no flow path. FIG.
The undiluted solution branching member 25 shown in (4) is a fourth modified example, and has a triangular branching portion 26 and also has no flow path.

FIG. 16 shows a third embodiment of the present invention, which is different from the above-described first and second embodiments in the following points. That is, when the inside of the heat insulating box 27 is divided into, for example, a refrigerating room 28, a freezing room 29, and a vegetable room 30 from above by the partition parts 27a and 27b, and the lower rear part of the vegetable room 30 is used as a machine room 31. At the side, the vacuum insulation panel 3 for side parts corresponding to the side parts of the refrigerator compartment 28 and the freezer compartment 29
2 and 33 are arranged separately in the upper and lower parts, and the vacuum heat insulating panel is not arranged in the lower part corresponding to the side parts of the vegetable compartment 30 and the machine compartment 31, but only the foam heat insulating material 11.

In general, a vacuum heat insulating panel is superior in heat insulation performance to a foam heat insulating material, but the mechanical strength of the box body in the portion using the vacuum heat insulating panel is weaker than that in the portion using the foam heat insulating material. There is. The reason is that the foamed heat insulating material is filled in close contact with the outer box 3 and the inner box 4 which form the outer shell 2, so that the mechanical strength becomes strong. This is because it is only sandwiched between them in the state of being adhered to the box 4 with the adhesive.

Therefore, in the third embodiment, a vacuum heat insulating panel is arranged around the refrigerating room 28 and the freezing room 29 which require heat insulation, and the vegetable room 30 which does not need heat insulation so much is provided. Around the machine room 31, a foamed heat insulating material is filled. As a result, the vegetable room 30 and the machine room 3
The mechanical strength around 1 can be secured.

The present invention is not limited to a heat insulating box of a refrigerator, but can be applied to a heat insulating box of a freezer, a warm storage, a refrigerating showcase or a vending machine.

[0036]

According to the present invention, the following effects can be obtained. According to the heat-insulating box body of claim 1, since the undiluted solution branching member is arranged in a space corresponding to the injection port in the space of the outer shell, when the undiluted solution of the foamed heat insulating material is injected from the injection port, The first undiluted solution can be evenly branched in each direction by the undiluted solution branching member, the undiluted solution can be satisfactorily flown in each direction, and as a result, the foam insulation material should be filled as uniformly as possible in the space inside the outer shell. Will be possible.

According to the heat-insulating box of the second aspect, since the undiluted solution branching member has the flow path, the undiluted solution can flow more smoothly. According to the heat insulating box body of claims 3 and 4,
It is possible to efficiently fill the foam insulating material in the space.

According to the heat-insulating box body of the present invention, the partitioning member allows the foam insulation to be foamed by being injected from the rear inlet of the outer shell and the foam foam being injected from the front inlet to foam. Since the heat insulating material can be separated, it is possible to prevent one foamed heat insulating material from interfering with the filling of the other foamed heat insulating material.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is represented by X- in FIG.
Cross-sectional view along X-ray

FIG. 2 is a perspective view of the entire appearance.

FIG. 3 is a vertical sectional side view taken along line YY in FIG.

FIG. 4 is a perspective view of a foam insulating material portion.

FIG. 5 is a perspective view of a stock solution branching member.

FIG. 6 is a view corresponding to FIG. 1 in a state before being filled with a foam insulation material.

FIG. 7 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG.

FIG. 10 is a perspective view of a portion where a partition member is arranged.

FIG. 11 is a view corresponding to FIG. 10 showing a modified example of the partition member.

FIG. 12 is a perspective view showing a first modification of the stock solution branching member.

FIG. 13 is a perspective view showing a second modification of the stock solution branching member.

FIG. 14 is a perspective view showing a third modification of the stock solution branching member.

FIG. 15 is a perspective view showing a fourth modification of the stock solution branching member.

FIG. 16 is a vertical sectional front view showing a third embodiment of the present invention.

[Explanation of symbols]

1 is a heat insulating box, 2 is an outer shell, 3 is an outer box, 4 is an inner box, 5 is an opening, 6,7,8,9 is a vacuum heat insulating panel, 10 is a space, 11 is a foam heat insulating material, 12 is an injection port, 13 is a stock solution branching member, 16 is a flow path, 18 is an injection port, 19 and 20 are partition members, 21, 22, 23 and 25 are stock solution branching members, 32,
33 is a vacuum heat insulation panel.

Claims (5)

[Claims] 1. A vacuum heat insulation panel is provided inside an outer shell formed by combining an outer box and an inner box, and a stock solution injected from an injection port formed in the outer shell is foamed. Insulation box configured by filling a foam insulation material in a space other than the area where the vacuum insulation panel is arranged, having an opening at the front surface, and having insulation walls at the top, bottom, left, right, and back In the body, a stock solution branching member that branches the stock solution of the foamed heat insulating material injected from the injection port into at least two directions is provided at a portion corresponding to the injection port in a space portion inside the outer shell. Insulated box body characterized by. 2. The heat insulating box according to claim 1, wherein the undiluted solution branching member has a flow path for guiding the flow of the undiluted solution. 3. The heat-insulating box body according to claim 1, wherein the inlet is arranged in a portion of the outer shell corresponding to a rear-side corner portion. 4. The heat insulating box body according to claim 3, wherein the inlet is also arranged in a portion of the outer shell corresponding to the front corner. 5. A foam insulating material filled in a space filled with a foam insulating material, the foam insulating material being injected from a rear inlet of the outer shell to foam, and a foam insulating foam being injected from a front inlet to foam. The heat insulation box body according to claim 4, wherein a partition member is arranged at least at a part of a portion where the heat insulation material abuts.