WO2024057582A1

WO2024057582A1 - Heat-insulated storage container

Info

Publication number: WO2024057582A1
Application number: PCT/JP2023/008119
Authority: WO
Inventors: 義明藤木; 浩俊渡邊
Original assignee: 日立グローバルライフソリューションズ株式会社
Priority date: 2022-09-16
Filing date: 2023-03-03
Publication date: 2024-03-21
Also published as: JP2024043341A

Abstract

The present invention comprises an internal space (30) into which a foam heat-insulating material is injected, and a gap (21) having dimensions that allow passage of the foam heat-insulating material during foaming. The gap (21) links the internal space (30) and a machinery chamber (11) together and includes opposing surfaces comprising an inner wall surface (3a) of a side plate (3) and an outer surface (2b3) of a rising part (2b1) extending in the flow direction of the foam heat-insulating material. The present invention is provided with a foam cured product (20) including a region sandwiched by the opposing surfaces, the foam cured product (20) serving as an obstacle to the flow of the foam heat-insulating material that passes through or would pass through the gap (21).

Description

insulated storage

The present invention relates to an insulated storage.

Patent Document 1 describes that a foaming adhesive is applied to the holes and foamed in order to prevent the foamed heat insulating material from leaking to the outside.

Japanese Patent Application Laid-Open No. 61-213469

However, as in Patent Document 1, if the hole is only as thick as the thickness of the outer panel, the foam adhesive will be exposed to the outside of the hole, which will deteriorate the appearance quality. Furthermore, the area to be applied is narrow, and whether the foam adhesive is applied manually or by machine, it is necessary to position it accurately.

The insulating storage of the present invention includes an internal space into which a foamed heat insulating material is injected, and a path sized to allow the foamed insulating material to pass through, and the path connects the internal space and the external space. , a foam that obstructs the flow of the foam insulation material passing or attempting to pass through the path, including opposing surfaces extending in the flow direction of the foam insulation material, and including at least a region sandwiched between the opposing surfaces. Equipped with a cured product.

It is a rear view of the refrigerator of this embodiment. It is a perspective view showing the bottom plate of a refrigerator. It is a layout diagram of the cured foam material provided between the side plate and the bottom plate. It is a perspective view when a machine room is seen from the back bottom side. It is a sectional view when flexible urethane foam is provided as a comparative example. 4 is a sectional view taken along the line VI-VI in FIG. 3. FIG. 5 is a sectional view taken along the line VII-VII in FIG. 4. FIG. 5 is a sectional view taken along the line VIII-VIII in FIG. 4. FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiment, and various modifications and application examples within the technical concept of the present invention are also included in the scope of the present invention. In addition, the following description will be based on the directions shown in Figures 1 and 2.
FIG. 1 is a rear view of the refrigerator according to the present embodiment.
As shown in Fig. 1, refrigerator 1 (insulated storage cabinet) has a bottom plate 2 arranged on the bottom side as outer plates made of steel,

side plates

3 and 4 arranged on the left and right side sides, a rear plate 5 (back plate) arranged on the back side, and a top plate 6 arranged on the top side. An outer box 7 is formed by the bottom plate 2, the

side plates

3 and 4, the rear plate 5, and the top plate 6. The rear plate 5 is fixed to the

side plates

3 and 4 with screws at the top and bottom four corners of the back side.

In addition, the refrigerator 1 has a foam insulation material ( It has a heat insulating box constructed by injecting, foaming and curing a material (not shown). Note that the foamed heat insulating material is, for example, hard urethane foam, and the inner space 30 formed between the outer box 7 and the inner box 10 (see FIG. ) is injected with foam insulation material (rigid urethane foam). This internal space 30 is a space into which foamed heat insulating material is injected.

Furthermore, a machine room 11 is provided at the lower back of the refrigerator 1. This machine room 11 is an external space located outside the heat insulating box, and houses a compressor 12, a condenser 13, a blower fan 14, and the like. The refrigerator 1 includes a refrigeration cycle in which a compressor 12, a condenser 13, a capillary tube (not shown), and a cooler 15 provided in an internal space are sequentially connected to a refrigerant pipe 16 (see FIG. 3). There is.

FIG. 2 is a perspective view showing the bottom plate of the refrigerator.
As shown in FIG. 2, the bottom plate 2 includes a lower section 2a that is placed at the front side of the refrigerator 1 (see FIG. 1) and has the lowest height, and an upper section 2a that is placed at the back and has the highest height. 2b, and an upright surface part 2c that connects the lower part 2a and the upper part 2b and extends in a substantially vertical direction.

Further, a rising portion 2b1 is formed at the left end edge of the upper stage portion 2b so as to be bent upward. This rising portion 2b1 is formed in a substantially rectangular shape that is long in the front-rear direction. Further, a rising portion 2c1 is formed at the left end edge of the rising surface portion 2c, and is bent so as to rise forward. This rising portion 2c1 is formed into a substantially rectangular shape that is long in the vertical direction. Incidentally, raised portions 2b2 and 2c2 are similarly formed on the right end edge of the upper stage portion 2b and the right end edge of the upright surface portion 2c, but since they are similar to the raised portions 2b1 and 2c1, this embodiment is not applicable. In the embodiment, the rising portions 2b1 and 2c1 will be shown and explained.

FIG. 3 is a layout diagram of the cured foam material provided between the side plate and the bottom plate. Note that FIG. 3 is viewed from the front side of the left side of the refrigerator 1, and the outer surface of the inner box 10 is visible. Further, the side plate 3 is shown by a two-dot chain line.
As shown in FIG. 3, the refrigerator 1 is provided with a refrigerant pipe 16 that connects a compressor 12 (see FIG. 1) and a cooler 15 (see FIG. 1). This refrigerant pipe 16 connects the compressor 12 in the external space and the cooler 15 in the internal space of the insulated box, so there is a space (gap) connecting the machine room 11 and the internal space. It becomes necessary.

Furthermore, a foamed heat insulating material (not shown) made by injecting and foaming rigid urethane foam is provided between the outer box 7 (see FIG. 1) and the inner box 10. For this reason, in order to prevent urethane from leaking out of the space (gap) mentioned above during urethane injection, it is necessary to fill the gap in advance.

FIG. 4 is a perspective view of the machine room viewed from the rear bottom side. Note that FIG. 4 shows a state in which all parts including the compressor 12 have been removed from the machine room 11.
As shown in FIG. 4, the bottom plate 2, side plate 3, and rear plate 5 are fixed to each other via screws 17 at the lower left corner, which is one of the four corners of the rear plate 5. Note that at the lower right corner of the rear plate 5, the bottom plate 2, the side plate 3, and the rear plate 5 are similarly fixed to each other via screws (not shown).

Furthermore, a gap (space), which will be described later, is formed between the rising portion 2b1 of the bottom plate 2 (see FIG. 3) and the left side plate 3, and the refrigerant pipe 16 is passed through the gap. This refrigerant pipe 16 is arranged so as to extend vertically through the gap. Therefore, a gap is formed between the left end portion of the bottom plate 2 and the side plate 3.

As shown in FIG. 5, the conventional method for filling such gaps is to first apply a sealing material 100 such as flexible urethane foam to the bottom plate 2 before assembling the bottom plate 2 and the side plates 3. It was pasted in place on the side. Furthermore, since the sealing material 100 has an elastic repulsive force, when assembling the bottom plate 2 and the side plates 3 after installing the sealing material 100, the bottom plate 2 and the side plates 3 are pressed against each other to crush the sealing material 100. It was fixed with screws. In such a method, it is necessary to apply the sealing material 100 before assembling the bottom plate 2 and the side plates 3, and when the bottom plate 2 and the side plates 3 are assembled, the bottom plate 2 and the side plates 3 are pressed against each other. This required work and was complicated.

Therefore, in this embodiment, instead of the sealing material 100 such as flexible urethane foam, a cured foam material 20 is used for sealing. This cured foam material 20 is a sealing material that foams and hardens when applied, and for example, Foammelt (registered trademark) can be used. The cured foam 20 is applied between the rising part 2b1 of the bottom plate 2 and the side plate 3, and between the rising part 2c1 of the bottom plate 2 and the side plate 3, as shown by the black band line in FIG. It is formed. Further, the cured foam 20 is applied to the entire area from the rear end of the raised portion 2b1 to the lower end of the raised portion 2c1.

FIG. 6 is a sectional view taken along the line VV in FIG. 3.
As shown in FIG. 6, a gap 21 is formed between the raised portion 2b1 of the bottom plate 2 and the side plate 3 having the inner wall surface 3a facing the raised portion 2b1. This gap 21 is formed to extend along the vertical direction. In other words, the gap 21 is a path with a size that allows the foamed heat insulating material to pass through, and does not include a path with a size that the foamed heat insulating material cannot pass through.

Furthermore, the gap 21 (path) connects the internal space 30 and the machine room 11 (external space). Further, the gap 21 is constituted by a raised portion 2b1 extending in the flow direction of the foam heat insulating material (in the vertical direction in the cross-sectional view of FIG. 5) and an inner wall surface 3a. The outer surface 2b3 (the surface facing the inner wall surface 3a) of the raised portion 2b1 and the inner wall surface 3a of the side plate 3 facing the raised portion 2b1 correspond to opposing surfaces.

The cured foam material 20 includes a region sandwiched between the facing surfaces of the outer surface 2b3 of the rising portion 2b1 and the inner wall surface 3a of the side plate 3, and the foamed heat insulating material passes through or attempts to pass through the gap 21 (route). is configured to be a hindrance to By providing the cured foam material 20 in the gap 21 in this way, the foam insulation material in the internal space 30 does not leak into the machine room 11 (external space) through the gap 21 when the foam insulation material is injected. .

Furthermore, before applying the cured foam material 20, the outer box 7 and the inner box 10 are completely assembled. That is, the bottom plate 2, the side plates 3, and the rear plate 5 are fixed to each other with screws, and assembled in a state in which the foamed heat insulating material can be injected.

Further, the cured foam material 20 is applied from the machine room 11 side along the gap 21 formed between the rising portion 2b1 of the bottom plate 2 and the inner wall surface 3a of the side plate 3. Note that the cured foam material 20 is sprayed along the gap 21 using a device such as a spray gun. The applied cured foam material 20 is foamed (and cured) as it travels through the gap 21 toward the internal space 30 side. Similarly, the cured foam 20 is removed from the space on the machine room 11 side with respect to the gap (path) formed between the rising portion 2c1 of the bottom plate 2 (see FIG. 3) and the inner wall surface of the side plate 3. applied. Furthermore, the cured foam 20 is also applied between the inner wall surfaces of the bottom plate 2 and the side plates 3 where the raised portions 2b1 and 2c1 are not formed. The foaming ratio of the cured foam 20 is such that it can sufficiently fill the gap 21 when applied to the gap 21. Further, although the foamed heat insulating material trying to pass through the gap 21 presses the cured foam 20 with a large force, the cured foam 20 has the strength to withstand the force. Further, the cured foam 20 is firmly fixed to the outer surface 2b3, the inner wall surface 3a, etc., and closes the gap 21. Moreover, the cured foam material 20 sticks to the inner wall surface 3a, the outer surface 2b3, etc. so firmly that it does not move even if it is pushed by the foamed heat insulating material. As a result, the cured foam material 20 becomes an obstacle to the flow of the foamed heat insulating material.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. Note that FIG. 7 is shown schematically for convenience of explanation.
As shown in FIG. 7, the side plate 3 is formed with a bent portion 3b that is bent inward. Further, the bottom plate 2 is arranged at the innermost position, and the rear plate 5 is arranged at the outermost position. Furthermore, a bent portion 3b of the side plate 3 is arranged between the bottom plate 2 and the rear plate 5. In this way, the bottom plate 2, the side plates 3, and the rear plate 5 are stacked, and the screws 17 are inserted from the rear plate 5 side (outside) so as to penetrate through the rear plate 5 and the side plates 3, and are screwed into the bottom plate 2. .

Note that the cured foam material 20 is injected, foamed, and cured after the bottom plate 2, side plates 3, and rear plate 5 are all assembled. In this way, there is no need to crush the sealing material when screwing, as explained with reference to FIG. 5 above. Further, since the work of crushing the sealing material is a work that requires force, by eliminating such work, work efficiency can be improved.

FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 4.
As shown in FIG. 8, a gap 21 is formed between the rising portion 2b1 of the bottom plate 2 and the side plate 3, through which the refrigerant pipe 16 passes. Moreover, the gap dimension W of the opposing surface between the outer surface 2b3 of the rising portion 2b1 and the inner wall surface 3a of the side plate 3 is formed larger than the outer diameter dimension R of the refrigerant pipe 16, and is set to, for example, 7 mm. . Therefore, when the cured foam 20 is provided in the gap 21, the cured foam 20 is also filled between the refrigerant pipe 16 and the outer surface 2b3 and between the refrigerant pipe 16 and the inner wall surface 3a. , it becomes possible to fill the entire opposing surface of the gap 21 where the refrigerant pipe 16 is located with the cured foam 20.

Further, the facing surfaces where the rising portion 2b1 and the side plate 3 face each other have a length dimension L. That is, the length dimension L is formed longer than the gap dimension W. Further, the length dimension L is set to, for example, 20 mm.

As explained above, the refrigerator 1 (insulated storage) of the present embodiment has an internal space 30 into which the foamed insulation material is injected, and a gap 21 (path) having a size that allows the foamed insulation material to pass through. Be prepared. The gap 21 (route) connects the internal space 30 and the machine room 11 (external space), and connects the outer surface 2b3 of the raised portion 2b1 and the inner wall surface 3a (opposed surface) of the side plate 3 that extends in the flow direction of the foam insulation material. )including. A cured foam material 20 is provided that includes a region sandwiched between the outer surface 2b3 and the inner wall surface 3a (opposed surface) and becomes an obstacle to the flow of the foam heat insulating material passing through or attempting to pass through the gap 21 (pathway). According to this, before assembling the bottom plate 2 and the side plates 3, the work of attaching the sealing material to the bottom plate 2 and the pressing work when fixing the screws are no longer necessary, and the workability of filling the gap can be improved. Further, by providing the cured foam material 20, it is possible to provide a small gap, thereby preventing leakage when the foam heat insulating material is injected.

Further, in this embodiment, the facing surface is constituted by a rising portion 2b1 rising from the bottom plate 2 disposed on the bottom side of the internal space 30, and an inner wall surface 3a of the side plate 3 facing the rising portion 2b1. be done. A rear plate 5, a side plate 3, and a bottom plate 2 arranged on the rear side of the internal space 30 are stacked in this order, and are fixed from the rear plate 5 side via screws 17. According to this, the bottom plate 2, the side plates 3, and the rear plate 5 can be fixed to each other, and the cured foam material 20 can be provided afterwards.

Furthermore, in this embodiment, no elastic body is provided in the gap 21 (path). The elastic body is a sealing material such as soft urethane foam, and since such a sealing material is not provided in the gap 21, there is no need to press the bottom plate 2 and side plate 3 against each other, which improves work efficiency. You can improve.

Additionally, this embodiment includes a refrigerant pipe 16 that passes between the internal space 30 and the machine room 11 (external space) via the gap 21 (path). The gap dimension W of the gap 21 is larger than the outer diameter dimension R of the refrigerant pipe 16. According to this, even if the refrigerant pipe 16 is passed through the gap 21, the gap 21 can be filled with the cured foam material 20, and leakage of the foam insulation material can be prevented.

Furthermore, in this embodiment, the external space is the machine room 11 that houses the compressor 12 that compresses the refrigerant, and the cured foam 20 is applied from the machine room 11 side toward the gap 21. According to this, the work of applying the cured foam material 20 becomes easier.

In addition to the case where two outer panels such as the bottom plate 2 and the side panels 3 face each other, the present invention also provides for a hole formed in the outer panel to have a cylindrical shape extending perpendicularly to the surface of the outer panel from the edge of the hole. It may be applied to those having a route of

1 Refrigerator (insulated storage)
2 Bottom plate 2b Upper part 2b1 Standing part 2b3 Outer surface (opposing surface)
2c Standing surface part

2c1 Standing part

3, 4 Side plate 3a Inner wall surface (opposing surface)
5 Rear plate 10 Inner box 11 Machine room (external space)
12 Compressor 16 Refrigerant pipe 17 Screw 20 Cured foam 21 Gap (path)
30 Internal space L Length dimension R Outer diameter dimension W Gap dimension

Claims

an internal space into which foam insulation is injected;
a path with dimensions that allow the foamed insulation material to pass through during foaming;
The path connects the internal space and the external space and includes opposing surfaces extending in the flow direction of the foam insulation material,
A heat insulating storage including at least a region sandwiched between the opposing surfaces and comprising a cured foam material that becomes an obstacle to the flow of the foam heat insulating material passing or attempting to pass through the path.
The insulated storage according to claim 1,
The opposing surface is composed of a raised part rising from the bottom plate and an inner wall surface of the side plate facing the raised part,
A heat-insulating storage cabinet in which a rear plate, a side plate, and a bottom plate arranged on the rear side of the internal space are stacked in this order and fixed with screws from the rear plate side.
In the adiabatic storage according to claim 1 or 2,
A heat insulating storage in which an elastic body is not provided in the path.
The insulated storage according to claim 1,
comprising a refrigerant pipe passing between the internal space and the external space via the path,
The adiabatic storage is such that the gap size of the path is larger than the outer diameter size of the refrigerant pipe.
The insulated storage according to claim 1,
The external space is a machine room that houses a compressor that compresses refrigerant,
The cured foam is applied from the machine room side toward the path.