JP2013249977A - Refrigerator and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which a flow of a foam heat insulation material is smoothened within a heat insulation space having a vacuum heat insulation material therein, and a manufacturing method for the same.SOLUTION: A refrigerator 1 includes: an outer box 6 constituting an enclosure forming an heat insulation box body 1H1; an inner box 7 forming storage chambers 2, 3, 4; a foam heat insulation material 11 to be filled in the heat insulation space 15 formed between the outer box 6 and the inner box 7; and an outer box side vacuum heat insulation material 16 attached to the outer box 6 and an inner box side vacuum heat insulation material 17 attached to the inner box 7, both vacuum heat insulation materials being arranged with the foam heat insulation material 11 within the heat insulation space 15, wherein at least either one of the outer box side vacuum heat insulation material 16 or the inner box side vacuum heat insulation material 17 is arranged at a section of the heat insulation space 15 opposite to partitioning heat insulation walls 9, 10 partitioning the interior for heat insulation.

Description

  The present invention relates to a refrigerator and a method for manufacturing the refrigerator.

  2. Description of the Related Art Conventionally, a heat insulating box body in a refrigerator has an outer shell formed of a steel plate outer box forming a casing and a resin inner box forming a storage chamber. And the heat insulation space formed between an outer box and an inner box is filled with the polyurethane foam (henceforth a foam heat insulating material) which integrates an outer box and an inner box, and the heat insulation box is comprised.

In recent years, for the purpose of energy saving and improvement of the volumetric efficiency in a warehouse, a product in which a vacuum heat insulating material having a high heat insulating effect is disposed in a heat insulating space in combination with a foam heat insulating material has been commercialized.
This vacuum heat insulating material has a plate shape, a thickness of about 10 to 15 mm, and a width and a length that are slightly smaller than the dimensions of the side wall, for example, the left and right side walls of the outer box. Is formed. When this vacuum heat insulating material is disposed in the heat insulating space, the empty space is reduced, so that the resistance at the time of filling the foam heat insulating material (foam) is increased and the flow is inhibited.

This leads to the generation of cavities or voids in the rear surface of the heat insulating box (corresponding to the rear plate of the refrigerator), which is the final filling portion in the heat insulating space.
The factor that hinders the flow of foam insulation is that the insulation space between the outer box and inner box is becoming narrower year by year in order to improve the efficiency of the internal volume. It is because it arrange | positions in the heat insulation space between an outer box and an inner box.

  That is, when the thickness of the heat insulating space formed by the outer box and the inner box is about 40 mm, when two vacuum heat insulating materials having a thickness of about 10 to 15 mm are arranged, for example, the heat insulating space of about 20 to 30 mm in thickness is arranged. Therefore, the passage through which the foamed heat insulating material flows in the heat insulating space is substantially narrow with a space of about 10 mm in thickness.

  The polyurethane foam stock solution forming the foam insulation is injected from the back side of the heat insulation box (rear plate side of the refrigerator), and the final filling part where the stock solution is finally injected is the back side of the heat insulation space (refriger rear plate). Part).

  That is, urethane foam (hereinafter referred to as foam) that has started to foam in the heat insulation space of the heat insulation box flows toward the final filling portion while filling the narrow space other than the vacuum heat insulating material with the foam. There is a high possibility that the foam does not reach the final filling portion because the resistance is large and voids or voids are generated.

In addition, the outer packaging material that surrounds the vacuum insulation material is made of a laminate film of synthetic resin and aluminum foil, so it is necessary to pay close attention not to damage the outer packaging material when it is placed in the insulation space. is there. However, an increase in the size of the vacuum heat insulating material has induced this damage.
In addition, the vacuum heat insulating material requires an ear portion (defined in paragraph 0015) for heat-sealing the outer packaging material in order to seal the inside. If this ear part is folded back to the side opposite to the attachment surface of the vacuum heat insulating material on the outer packaging material surface side, the thickness of the part where the folded part is located is increased by about 5 mm.

Since the vacuum heat insulating material has the ears on almost the entire circumference, for example, four sides in the case of a rectangular shape, in a box having two vacuum heat insulating materials, a vacuum heat insulating material having a thickness of 10 mm is used. Even if the heat insulation space is 40 mm, the thickness of the vacuum insulation material is 30 mm including the ears with two vacuum heat insulation materials, so the substantial passage of the foam heat insulation material becomes an empty space of 10 mm thickness, which increases resistance and foams. Insulation may not flow well.
In addition, there exist the following patent documents 1 and 2 as literature well-known invention concerning this application.

Japanese Patent Laid-Open No. 2005-147591 JP 2006-242439 A

By the way, the injection of the stock solution of the foam insulation material of the refrigerator is placed on the jig with the refrigerator body facing down so that the back side of the refrigerator body (the rear plate side of the refrigerator) is on the opening side of the inner box from the back side This is done toward the opening side of the refrigerator body.
This undiluted solution begins to form (foam) in about 10 to 30 seconds when it reaches the entire inner box opening side, and rises while foaming the side walls, ceiling wall, and bottom wall of the heat insulation box. It reaches the back and finishes foaming in about 4-6 minutes. Of course, the back surface portion (final filling portion) where the foaming lasts is determined in advance by repeated tests or the like.

  However, recently, there are refrigerators that further improve the heat insulation performance in relation to energy saving and improvement of volumetric efficiency in the storage. The refrigerator increases the number of vacuum heat insulating materials that have better heat insulating performance than foam heat insulating materials, and the conventional vacuum heat insulating materials that have been disposed only on the outer box, mainly on both side plates, back plates, and bottom plates, It is also arranged on the box side.

  Usually, the thickness of the vacuum heat insulating material is 10 to 15 mm, so that the cross section of the heat insulating space between the inner box and the outer box is attached to the outer box in a gap passage having a thickness of 40 to 60 mm. If it is provided, there is a problem that the vacuum heat insulating material hinders the flow of the foam at the time of filling the foamed heat insulating material, the foam does not reach the final filling portion, and a cavity or a void is generated.

  That is, a normal refrigerator is integrated with a heat insulating space between an outer box and an inner box, including a foam heat insulating material, including a vacuum heat insulating material. The foam heat insulating material used in the refrigerator has a very short time of about 4 to 6 minutes from the injection of the stock solution to the end of foaming. Therefore, for example, if a vacuum heat insulating material having a total thickness of 30 mm is disposed in a heat insulating space having a thickness of 40 mm, the flow of foam flowing therethrough increases the flow resistance and flows through the 40 mm gap passage. Significantly slower than speed. For this reason, the foam does not reach the final filling portion on the back surface of the refrigerator within a predetermined time, and the foaming is terminated, and the foam is insufficient on the back surface portion, so that cavities and voids are generated.

Moreover, a vacuum heat insulating material wraps a core material with two upper and lower outer packaging materials, and pressure-molds the core material. Thereafter, the inside of the outer packaging material is evacuated, the periphery of the outer packaging material is thermally welded, the inside is sealed, and a predetermined plate shape is formed.
For this reason, the edge part (henceforth an ear | edge part) including a welding part always remains in the outer periphery of a vacuum heat insulating material. In general, the ear is generally bent from its root to the side opposite to the attachment surface of the vacuum heat insulating material, overlapped with the outer packaging material, and fixed with tape or the like.

Since the thickness of the overlapped ear portion is about 5 mm, this ear portion naturally obstructs the foam flow of the foam insulation material, and of course, causes the voids and voids to form in the final filling portion of the foam insulation material. It has become.
In Patent Documents 1 and 2, nothing is described regarding foam flow inhibition by the ears.

In addition, as in Patent Documents 1 and 2, the cost should be improved and the weight of the refrigerator should be improved by increasing the injection amount in order to eliminate the cause of creating voids, voids, etc. in the final filling portion of the foam insulation. There are challenges.
This invention aims at provision of the manufacturing method of the refrigerator and refrigerator which make the flow of the foam heat insulating material smooth in the heat insulation space in which a vacuum heat insulating material exists in view of the said actual condition.

  The present invention has been made to solve the above-described object, and a refrigerator according to the first aspect of the present invention includes an outer box forming a casing forming a heat insulating box, an inner box forming a storage chamber, and the outer box. And a foam heat insulating material filled in a heat insulating space formed between the inner box and the outer box side vacuum heat insulating material disposed in the heat insulating space together with the foam heat insulating material and attached to the outer box, and the inner An inner box-side vacuum heat insulating material attached to the box, and the outer box-side vacuum heat insulating material and the inner box-side vacuum heat insulating material at a location of the heat insulating space facing the partition heat insulating wall that partitions and insulates the inside of the cabinet. At least one of them is arranged.

  The refrigerator manufacturing method according to the second aspect of the present invention includes an outer box-side vacuum heat insulating material attached to the outer box in an insulating space between the outer box and the inner box forming the wall plate of the heat insulating box body of the refrigerator. The inner box side vacuum heat insulating material attached to the inner box is provided, and the outer box side vacuum heat insulating material and the inner box side vacuum are provided in the heat insulating space facing the partition heat insulating wall that partitions and insulates the inside of the warehouse. At least one of the heat insulating materials is provided, and a stock solution of the foam heat insulating material is filled in the heat insulating space of the heat insulating box.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the refrigerator and refrigerator which make the flow of the foam heat insulating material smooth in the heat insulation space in which a vacuum heat insulating material exists can be implement | achieved.

It is a front view of the refrigerator of the embodiment concerning the present invention. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. (a) is CC sectional view taken on the line of FIG. 2, (b) is the CC equivalent sectional view of FIG. 2 of a comparative example (conventional). It is a principal part longitudinal cross-sectional view which shows the state which inject | pours and foams polyurethane foam (foaming heat insulating material) in the heat insulation box of a refrigerator with an arrow. It is a cross-sectional view showing the internal configuration of the outer box side / inner box side vacuum heat insulating material.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.
The refrigerator 1 of the embodiment includes a refrigerator compartment 2, a freezer compartment 3, and a vegetable compartment 4 in order from the top. In the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4, the front opening edges 2e, 3e, and 4e (see FIG. 2) are closed by the doors 2t, 3t, and 4t so as to be freely opened and closed.

The refrigerator 1 includes a refrigerator main body 1H in which a storage room (2, 3, 4) is formed, and doors 2t, 3t, and 4t attached to the refrigerator main body 1H.
In the refrigerator main body 1H, the heat insulating layer is formed by arranging the vacuum heat insulating materials (16, 17) and the foam heat insulating material 11 in the heat insulating space 15 formed between the outer box 6 and the inner box 7. A box formed by the outer box 6, the inner box 7 and the heat insulating space 15 between them is referred to as a heat insulating box 1H1.

As shown in FIG. 2, the compressor 5 which comprises the refrigerating cycle for cooling the inside of the store | warehouse | chamber is arrange | positioned at the back lower part of the refrigerator main body 1H.
The outer box 6 forming the housing of the refrigerator main body 1H is made of a thin steel plate.
The outer case 6 is formed by integrally forming the side plates 6a, 6b and the top plate 6c from a steel strip using a forming roll or the like, and the bottom plate 6d and the back plate 6e are assembled by screwing or the like.

3 is a cross-sectional view taken along line BB in FIG. 4A is a cross-sectional view taken along the line C-C in FIG. 2, and FIG. 4B is a cross-sectional view taken along the line C-C in FIG. 2 of the comparative example (conventional).
A bottom plate 6d and a back plate 6e are connected to each rear end edge (upper side in FIGS. 3 and 4) of the side plates 6a and 6b and a rear end edge (not shown) of the top plate 6c (see FIG. 2). For this purpose, an H-shaped bent portion 8b that is folded in a triple manner is formed.

When assembling the bottom plate 6d (see FIG. 2) and the back plate 6e to the side plates 6a, 6b and the top plate 6c, H-shaped bent portions provided at the rear edges of the side plates 6a, 6b and the top plate 6c. The side edges of the bottom plate 6d and the back plate 6e are inserted into 8b and assembled by screws or screws.
On the front end edge of the outer box 6 (the lower side of FIGS. 3 and 4 (a)), an R-shaped bent portion 8a is formed, which forms an R shape by folding the steel plate.
When assembling the inner box 7 to the outer box 6, the flange portion 7 a of the inner box 7 is inserted into a connecting R-shaped bent portion 8 a provided at the front edge of the outer box 6 and fixed.

  As shown in FIG. 2, the outer box-side vacuum heat insulating material 16 is attached (attached) to the outer box 6 in the heat insulating space 15 of the heat insulating box 1H1 as described later. In addition, the inner box-side vacuum heat insulating material 17 is attached (attached) to the inner box 7 in the heat insulating space 15. After that, the heat insulating space 15 in which the outer box / inner box side vacuum heat insulating materials 16 and 17 of the heat insulating box 1H1 are attached is filled with the foam heat insulating material 11.

Since it is necessary to insulate between the refrigerator compartment 2 in the refrigeration temperature zone and the freezer compartment 3 in the refrigeration temperature zone, a partition heat insulation wall 9 is provided to partition and insulate both chambers (2, 3).
Similarly, since it is necessary to insulate between the freezer compartment 3 in the freezing temperature zone and the vegetable compartment 4 in the refrigerated temperature zone, a partition heat insulating wall 10 is provided to partition and insulate both chambers (3, 4). Yes.
These partition heat insulation walls 9 and 10 are members formed in advance using foamed polystyrene foam or the like, and before filling the heat insulation space 11 into the heat insulation space 15 between the outer box 6 and the inner box 7, the inner box 7 It is fixed at a predetermined position.

<Filling the foam insulation 11 into the heat insulation box 1H1>
Next, filling of the foam heat insulating material 11 into the heat insulating space 15 of the heat insulating box 1H1 will be described.
FIG. 5 is a vertical cross-sectional view of the main part, which is shown by arrows, showing a state in which polyurethane foam (foaming heat insulating material) is injected into the heat insulating box of the refrigerator and foamed. In FIG. 5, the front opening edges 2e, 3e, 4e of the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4 are directed vertically downward.
A plurality of, for example, four inlets 12 for the stock solution 13 of the foam heat insulating material 11 are provided in the rear upper part and the rear lower part of the back surface of the heat insulating box 1H1.

The operation of injecting the stock solution 13 into the heat insulating box 1H1 is performed as follows.
The heat insulating box 1H1 is set so as to be placed in a foaming employment (foaming jig) 18 with its back face up. Thereafter, the stock solution 13 of the foam heat insulating material 11 is injected into the heat insulating space 15 from the inlet 12 on the back surface of the heat insulating box 1H1 toward the front opening edges 2e, 3e, 4e of the refrigerator 1 (arrows in FIG. 5). α1).

The injected stock solution 13 has fluidity, and spreads in the heat insulating space 15 over the entire area from the front opening edges 2e, 3e, 4e of the heat insulating box 1H1 in about 10 to 30 seconds.
Thereafter, the undiluted solution 13 starts to foam in the heat insulation space 15, and fills the heat insulation space 15 while proceeding toward the final filling portion 14 set in advance (the actual / broken line arrow α2 in FIG. 5). Continue foaming. During this time, it is about 4-6 quantiles.

<Outer box side vacuum heat insulating material 16, inner box side vacuum heat insulating material 17>
Next, the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulating material 17 attached to the outer box 6 and the inner box 7 in the heat insulating space 15 will be described in detail.
FIG. 6 is a cross-sectional view showing an internal configuration of the outer box side / inner box side vacuum heat insulating material.
The outer box side / inner box side vacuum heat insulating materials 16 and 17 enclose a glass wool layer, an adsorbent, and the like, which are inorganic fiber aggregates forming a core material 19 disposed in the center, with an inner bag material (not shown). The outer packaging material 20 having gas barrier properties such as aluminum foil is vacuum packaged.

  For the inner bag material (not shown), a polyethylene film, a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film, or the like is used. That is, as the inner bag material, a material having low hygroscopicity and capable of being thermally welded and having little outgas (gas leakage) is used.

  As the adsorbent, a physical adsorption type synthetic zeolite that captures moisture and gas molecules in the pores is used. The adsorbent may be any adsorbent that adsorbs moisture or gas, not a synthetic zeolite, and a chemical reaction adsorbent that adsorbs moisture or gas by a chemical reaction such as silica gel, calcium oxide, calcium chloride, or strontium oxide. It can also be used.

  About the jacket | cover material 20, the polypropylene film with low hygroscopicity is provided as a surface layer, and the aluminum vapor deposition layer is provided in the polyethylene terephthalate film as a moisture-proof layer. The gas barrier layer is laminated so that an aluminum vapor deposition layer is provided on the ethylene vinyl alcohol copolymer film and faces the aluminum vapor deposition layer of the moisture-proof layer.

  As described above, the laminate structure of the outer cover material 20 is a four-layer material made of a polypropylene film as a surface layer, a polyethylene terephthalate film as a moisture-proof layer, an aluminum vapor deposition layer, and an ethylene vinyl alcohol copolymer film as a gas barrier layer. It is configured. However, the material is not limited to the four-layer structure as long as it is a polyamide film or a polyethylene terephthalate film having equivalent gas barrier properties, heat resistance, and piercing strength, and each material can be selected as appropriate.

  Ear portions 21 are formed around the outer box side and inner box side vacuum heat insulating materials 16 and 17. In the manufacturing process, the ear portion 21 is formed when the core material 19 is inserted from the opening into the bag-shaped outer covering material 20 having an opening, and then pressed into a predetermined shape, and further, the opening is thermally welded. It is formed.

Usually, the length L1 of the ear | edge part 21 is formed in 40-60 mm. As shown in FIG. 6, the length L1 of the ear portion 21 is configured as L2 + L3 (= L1).
L2 is a dimension required to prevent air from entering the outer cover material 20 from the opening before welding of the outer cover material 20 and lowering the degree of vacuum, for example, 10 to 15 mm. It is a dimension (= L1-L2). In addition, the full length L1 of the ear | edge part 21 is preset at the time of design.

  The ear portion 21 is folded back to the center side, and the opposite mounting surface side is bent to the surface side (anti-attachment surface side) of the outer box side / inner box side vacuum heat insulating materials 16 and 17, and the tip end portion is fastened with tape or the like. Yes. The tape may be a vinyl tape or a resin tape, and is not limited. Or you may fasten the front-end | tip part of the ear | edge part 21 to the surface side of the outer box side and inner box side vacuum heat insulating materials 16 and 17 using an adhesive agent.

The part where the ear part 21 is fastened by the tape 22 is arranged to be on the side of the foam heat insulating material 11 which is the side opposite to the sticking surface when it is incorporated in the heat insulating space 15. This is to prevent the heat of the outer box 6 from being transmitted to the inner side through the ear portion 21. Moreover, it is for suppressing the cool heat in the store | warehouse | chamber of the inner box 7 through the ear | edge part 21 to the outer side of the store | warehouse | chamber, ie, suppressing the cool heat in a store | warehouse | chamber outside. The purpose is to suppress the so-called heat bridge.
As described above, the outer box side / inner box side vacuum heat insulating materials 16 and 17 formed in this way are disposed on the outer box 6 side and the inner box 7 side in the heat insulating space 15, respectively. .

This embodiment (invention) is characterized by the manner (method) of arrangement of the vacuum heat insulating materials 16 and 17.
<Installation of outer box side and inner box side vacuum heat insulating materials 16, 17>
Next, the attachment of the outer box side vacuum heat insulating material 16 to the outer box 6 and the attachment of the inner box side vacuum heat insulating material 17 to the inner box 7 will be described in detail.
As shown in FIGS. 3 and 4, the outer box side vacuum heat insulating material 16 is disposed on the heat insulating space 15 side of the side plates 6 a and 6 b and the back plate 6 e forming the outer box 6. An inner box side vacuum heat insulating material 17 is disposed on the heat insulating space 15 side of the inner box 7.

  In other words, the outer box side vacuum heat insulating material 16 is attached to the surface of the outer box 6 in the heat insulating space 15, and the inner box side vacuum heat insulating material 17 is attached to the surface of the inner box 7 in the heat insulating space 15. Is attached. The outer box side and inner box side vacuum heat insulating materials 16 and 17 are attached to the outer box 6 and the inner box 7 using an adhesive such as hot melt, for example.

The sticking operation is performed as follows when hot melt is used.
First, hot melt is heated and melted in a furnace and applied to the attachment surface of the outer box side vacuum heat insulating material 16 and also applied to the attachment surface of the inner box side vacuum heat insulating material 17.
And the sticking surface by which the hot melt of the outer box side vacuum heat insulating material 16 was apply | coated to the surface at the side of the heat insulation space 15 of the outer box 6, the hot melt was solidified by cooling, and the outer box side vacuum heat insulating material 16 is attached. Adhere to the outer box 6. In addition, a sticking surface to which the hot melt of the inner box side vacuum heat insulating material 17 is applied is attached to the surface of the inner box 7 on the heat insulating space 15 side, the hot melt is solidified by cooling, and the inner box side vacuum heat insulating material 17 is attached. Adhere to the inner box 7.

  The outer box side / inner box side vacuum heat insulating materials 16 and 17 are configured such that a heat insulating space 15 having a thickness of about 40 mm is provided around the heat insulating space 15 of the refrigerator compartment 2 around the outer space. Moreover, the outer box side / inner box side vacuum heat insulating materials 16 and 17 are configured such that a heat insulating space 15 having a thickness of about 60 mm is provided in the heat insulating space 15 of the freezer compartment 3 around three. That is, the heat insulating space 15 in which one layer of the outer box side / inner box side vacuum heat insulating materials 16 and 17 is arranged has a thickness of about 20 mm.

Moreover, as shown in FIG. 3 and FIG. 4A, the outer box side vacuum heat insulating material 16 adhered to the side plates 6a and 6b, the top plate 6c, and the back plate 6e in the heat insulating space 15, respectively, In order to avoid damage to the workpiece 20 and the like, the connecting R-shaped bent portion 8a formed at the front end edge and the connecting H-shaped bent portion 8b formed at the rear end edge are largely avoided, that is, the interval is increased. Are arranged.
Therefore, each outer box side vacuum heat insulating material 16 is formed in the area of a dimension smaller than the extension area of side plate 6a, 6b, the top plate 6c, and the back plate 6e, respectively.

  As a result, when the outer box side vacuum heat insulating material 16 is attached (fixed) to the side plates 6a, 6b, the top plate 6c, and the back plate 6e, the connecting H-shaped bent portion 8b and the connecting R-shaped bent portion are used. By contacting the end face of the portion 8a, the outer box side vacuum heat insulating material 16 is prevented from being damaged.

  Similarly, the inner box-side vacuum heat insulating material 17 attached to the inner box 7 in the heat insulating space 15 is an R-shaped bent for connection formed on the front edge in order to avoid damage to the outer jacket material 20 and the like. The portions 8a are largely avoided, that is, they are arranged at intervals.

Therefore, the inner box-side vacuum heat insulating material 17 is formed to have an area smaller than the extension area of the mounting surface of the inner box 7.
Thereby, when the inner box side vacuum heat insulating material 17 is stuck (fixed) to the inner box 7, the inner box side vacuum heat insulating material 17 is damaged by contacting the end surface of the R-shaped bent portion 8a for connection. Is suppressed.

That is, if possible, the outer box side vacuum heat insulating material 16 having high heat insulating properties should be made to have the same size (area) as the side plates 6a and 6b, the top plate 6c and the back plate 6e. Since the side plates 6a and 6b, the top plate 6c, and the back plate 6e can be widely covered, it is preferable from the viewpoint of increasing the heat insulation effect.
However, when the outer box side vacuum heat insulating material 16 is enlarged, the side plate 6a, 6b of the outer box side vacuum heat insulating material 16 is disposed near the connecting H-shaped bent portion 8b and the connecting R-shaped bent portion 8a. The probability of contact and damage during installation on the top plate 6c and the back plate 6e increases.
Therefore, the outer box-side vacuum heat insulating material 16 is arranged at intervals from the H-shaped bent portion 8b for connection and the R-shaped bent portion 8a for connection.

The inner box side vacuum heat insulating material 17 is also arranged at a distance from the connecting R-shaped bent portion 8a for the same reason.
P part of FIG. 3 shows the part of the heat insulation box 1H1 which is not covered with the vacuum heat insulating material so that the outer box side heat insulating material 16 avoids the H-shaped bent part 8b for connection.
Since the outer box side vacuum heat insulating material 16 is not disposed in the vicinity of the H-shaped bent portion 8b for connection of the outer box 6 of the P part, the P portion (outside the cover range of the outer box side vacuum heat insulating material 16) A corner inner box side vacuum heat insulating material 17a is disposed at a corner portion of the inner box 7.

Then, the corner inner box side vacuum heat insulating material 17a is wrapped (overlapped) with the outer box side vacuum heat insulating material 16 on the projection surface, in other words, the corner inner box side vacuum heat insulating material 17a becomes the outer box side vacuum heat insulating material 16. It is provided so that there may be a portion facing. The dimension that overlaps or opposes is preferably at least about 30 mm. The overlapping dimension may be arbitrarily selected.
With this configuration, a portion (location) that is not covered by the vacuum heat insulating material (16) of the outer box 6 of the P portion shown in FIG. 3 is eliminated.

  Of course, in this embodiment (the present invention), a means described later is adopted, and a gap passage G1 between the inner box side vacuum heat insulating material 17 and the outer box side vacuum heat insulating material 16 (a gap passage through which the foam heat insulating material 11 flows when foaming is performed). ) Has a dimension that allows at least the foamed heat insulating material 11 to flow satisfactorily, for example, a thickness dimension of 15 mm (= G1), and ensures a cross-sectional area of the gap passage G1.

Specifically, as shown in FIG. 4A, at least the inner box side vacuum heat insulating material 17 described in FIG. 3 is not provided in the heat insulating space 15 facing the partition heat insulating walls 9 and 10. It is a thing.
This is because the heat insulation wall portion (heat insulation space 15) facing the partition heat insulation walls 9 and 10 may have a higher temperature in the inner box 7 than the other heat insulation wall portions (heat insulation space 15). This is because the foamed heat insulating material flow path in the heat insulating space 15 facing the walls 9 and 10 is enlarged (widened) to facilitate the filling of the foamed heat insulating material 11 into the final filling portion 14 (see FIG. 5).

  As described above, as shown in FIG. 5, the stock solution 13 injected into the connecting portion (the heat insulating space 15) between the inner box 7 and the outer box 6 proceeds with foaming, but as shown in FIG. 4B of the comparative example. In addition, in the case where the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulating material 17 are arranged in the heat insulating space 15, the size of the gap passage G10 is conventionally as narrow as 10 to 15 mm. Therefore, the flow speed of the undiluted solution 13 in the arrow directions α1 and α2 shown in FIG. 5 is greatly reduced, and it does not reach the final filling unit 14 in 4 to 6 minutes, which is a predetermined foaming time, and the foaming is finished. There are a lot of things.

Therefore, in this embodiment, the flow of the foam (foamed heat insulating material 11) is improved in the heat insulating space 15 facing the partition heat insulating wall 9 (10) as compared to the other heat insulating spaces 15.
In other words, the foam (foam insulation 11), which has been short in the vicinity of the final filling portion 14 in the past, is partitioned to widen the flow path in the portion of the heat insulation space 15 facing the heat insulation wall 9 (10). The flow of the material 11) is made smooth and supplemented.

Specifically, as shown in FIG. 4 (a), an inner box-side vacuum heat insulating material 17 is provided in the heat insulating space 15 of the opposing portion of the partition heat insulating walls 9 and 10 that are not required to have heat insulating properties compared to other places. Not provided.
As a result, the thickness dimension of the gap passage G1 between the outer box side vacuum heat insulating material 16 and the inner box 7 is secured to 15 mm or more. Ensuring the thickness dimension of the gap passage G1 leads to securing a passage (flow path) through which the foam of the foam heat insulating material 11 flows.

  Therefore, the resistance when filling the heat insulating space 15 of the heat insulating box 1H1 shown in FIG. 5 with the foam heat insulating material 11 is reduced, and the final filling is completed within the set time without decreasing the flow speed of the foam in the directions of the arrows α1 and α2. The unit 14 is reached. Therefore, the cavity or void which has been generated conventionally is filled, and the filling operation without the cavity or void becomes possible.

As described above, by not providing the inner box side vacuum heat insulating material 17 in the heat insulating space 15 opposite to the partition heat insulating walls 9 and 10, a sufficient size of the gap passage G1 is secured (FIG. )), The foamed heat insulating material 11 which is insufficient in the vicinity of the final filling portion 14 is replenished by expanding the flow path using a place where the inner box side vacuum heat insulating material 17 is omitted.
In addition, as the location where it is difficult to ensure the dimension of the gap passage G1, the periphery of the refrigerator compartment 2 and the vegetable compartment 4 around which the heat insulating space 15 is about 40 mm can be cited.

  Therefore, in the heat insulation space 15 around the refrigeration room 2 and the vegetable room 4, the gap passage G1 through which the foam heat insulating material 11 in which the outer box side vacuum heat insulating material 16 and / or the inner box side vacuum heat insulating material 17 is disposed flows. It is more preferable to secure 15 mm or more because the foamed heat insulating material 11 can be satisfactorily filled into the heat insulating space 15.

In addition, both the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulating material 17 may be disposed at a place where the heat insulating space 15 is sufficiently secured to be around 60 mm, such as around the freezer compartment 3. .
The heat insulation space 15 around the freezer compartment 3 can be secured with a margin of 15 mm in the thickness dimension of the gap passage G1. Therefore, the heat insulation space 15 around the freezer compartment 3 includes the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulation. It is effective to arrange the material 17 and the corner inner box side vacuum heat insulating material 17a.

In summary, since the refrigerator 1 has the configuration as described above, the following effects can be obtained.
As shown in FIG. 5, the heat insulating box 1H1 is placed face down so that the back surface of the heat insulating box 1H1 of the refrigerator 1 faces upward, and the stock solution 13 of the foam heat insulating material 11 is filled from the back surface side. Let the filling part 14 be a back part of the heat insulation box 1H1. And in the heat insulation space 15 made between the outer box 6 and the inner box 7 which form the wall board (side wall) of the heat insulation box 1H1, the outer box side vacuum heat insulating material 16, the inner box side vacuum heat insulating material 17, and The foam heat insulating material 11 is arranged.

  In addition, at least one of the outer box side vacuum heat insulating material 16 or the inner box side vacuum heat insulating material 17 is disposed in the heat insulating space 15 facing the partition heat insulating walls 9 and 10 for partitioning and insulating the inside of the cabinet, and foaming is performed. After ensuring a larger cross-sectional area of the gap passage G1 through which the heat insulating material 11 flows (see FIG. 4A), the foamed heat insulating material 11 is filled.

The heat insulating space 15 of the opposing part of the partition heat insulating walls 9 and 10 in which the temperature difference between the inside and the outside of the box becomes small is foamed by using either the outer box side vacuum heat insulating material 16 or the inner box side vacuum heat insulating material 17. Since the space through which the heat insulating material 11 flows is sufficiently secured, the flow of the foam heat insulating material 11 can be partially improved, and foam filling to the back surface portion of the heat insulating box 1H1 is ensured. Thereby, the refrigerator 1 with high heat insulation efficiency and high productivity can be obtained.
Moreover, since the injection amount of the foam heat insulating material is not increased as in the prior art, the conventional problems to be solved such as high cost and increased weight of the refrigerator can be solved.

  Further, an outer box side vacuum heat insulating material 16 and an inner box side vacuum heat insulating material 17 are provided in the heat insulating space 15 around the freezer compartment 3 formed thicker than the thickness of the heat insulating space 15 around the other storage chambers (2, 4). The refrigerator 1 is configured so as to ensure uniform fluidity of the foam heat insulating material in accordance with the size of the gap passage G1 through which the foam heat insulating material 11 of the other storage chambers (2, 4) flows.

  Thereby, the flow of the foam heat insulating material 11 to the whole heat insulation space 15 can be made favorable, and the foam heat insulating material 11 can be reliably filled to the last filling part 14 set beforehand. Moreover, the refrigerator 1 which can improve the heat insulation effect around the freezer compartment 3 is obtained.

Moreover, it is good to set it as the refrigerator 1 which is in the heat insulation space 15 which arrange | positions the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulating material 17, and ensure the clearance gap G1 through which the foam heat insulating material 11 flows 15mm or more. .
As a result, the heat insulating space 15 can be uniformly filled with the foam heat insulating material 11.

  Further, the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulating material 17 are arranged in the heat insulating space 15 filled with the foam heat insulating material 11 between the outer box 6 and the inner box 7 forming the heat insulating box 1H1. In the refrigerator 1 configured as described above, the rear corner portion of the inner box 7 is covered with the corner inner box vacuum heat insulating material 17a, and the end portion of the corner inner box vacuum heat insulating material 17a is the outer box side vacuum heat insulating material end portion 16. And wrap (overlapping) or face each other on the projection plane.

  As a result, for example, there is an H-shaped bent portion 8b for connection at the corner where the side plates 6a, 6b and the back plate 6e of the outer box 6 are joined, so that the corner (FIG. 3, FIG. 4 (a)). The outer box side vacuum heat insulating material 16 is disposed apart from the P portion of FIG.

  Conventionally, in the refrigerator, there was a problem to be solved that the corner portion of the inner box is out of the cover range of the vacuum insulating material on the outer box side, but according to the present embodiment (invention), of course, this problem is solved. Since the gap passage G1 through which the foam heat insulating material 11 flows is not obstructed, a sufficient space in the gap passage G1 through which the foam heat insulating material 11 flows can be secured, and the flow of the foam heat insulating material 11 to the entire heat insulating space 15 can be improved. Moreover, the refrigerator 1 with good heat insulation efficiency and high productivity can be obtained.

<< Other Embodiments >>
In addition, in the said embodiment, although the case where the hot melt of a thermoplastic adhesive was used for sticking of the outer box side vacuum heat insulating material 16 and the inner box side vacuum heat insulating material 17 was illustrated, other adhesives were used. Also good.
In the above-described embodiment, various configurations have been described. However, these may be combined as appropriate.

  In addition, in the said embodiment, although the last filling part 14 of the back surface part of the heat insulation box 1H1 was illustrated as a location finally filled with the foam heat insulating material 11, it is good also considering the final filling part 14 other than a back surface part. However, it is more desirable to use the back surface portion of the heat insulating box 1H1 as the final filling portion 14 because the flow of the stock solution 13 of the foam heat insulating material 11 is easily grasped.

While various embodiments of the present invention have been described above, the description is intended to be exemplary.
That is, the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.

In addition, a part of the configuration of an embodiment can be replaced with another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Moreover, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
Thus, various modifications and changes are possible within the scope of the present invention. That is, the present invention can be arbitrarily changed as appropriate without departing from the spirit of the invention.

1 Refrigerator 1H1 Insulation box 2 Refrigerated room (storage room)
3 Freezer room (storage room)
4 Vegetable room (storage room)
6 Outer box 7 Inner box 9 Partition heat insulating wall 10 Partition heat insulating wall 11 Foam heat insulating material 13 Stock solution 15 Heat insulation space 16 Outer box side vacuum heat insulating material 17 Inner box side vacuum heat insulating material 17a Corner inner box side vacuum heat insulating material G1 Clearance passage P Outside Box corner

Claims (4)

An outer box that forms a housing that forms a heat insulating box and an inner box that forms a storage room;
A foam heat insulating material filled in a heat insulating space formed between the outer box and the inner box;
It is arranged with the foam heat insulating material in the heat insulating space, and comprises an outer box side vacuum heat insulating material attached to the outer box and an inner box side vacuum heat insulating material attached to the inner box,
At least one of the outer box side vacuum heat insulating material and the inner box side vacuum heat insulating material is disposed at a location of the heat insulating space facing the partition heat insulating wall that partitions and insulates the inside of the cabinet. Refrigerator. Comprising a freezing room in a freezing temperature zone having a heat insulating space formed thicker than the thickness of the heat insulating space around the other storage room in a refrigerated temperature zone;
The outer box side vacuum heat insulating material and the inner box side vacuum heat insulating material are arranged in the heat insulating space around the freezer compartment, and a gap passage through which the foam heat insulating material of the heat insulating space flows is heat insulating around the other storage chamber. The refrigerator according to claim 1, wherein the refrigerator is formed in a size matching a gap passage through which the foamed heat insulating material flows. The refrigerator according to claim 1, wherein a thickness of a gap passage through which the foam heat insulating material flows in the heat insulating space is 15 mm or more. An outer box side vacuum heat insulating material attached to the outer box and an inner box side vacuum heat insulating material attached to the inner box in the heat insulating space between the outer box and the inner box forming the wall plate of the heat insulating box body of the refrigerator And at least one of the outer box side vacuum heat insulating material and the inner box side vacuum heat insulating material is provided in the heat insulating space facing the partition heat insulating wall that partitions and insulates the inside of the warehouse. ,
A method for manufacturing a refrigerator, wherein a stock solution of foam heat insulating material is filled in a heat insulating space of the heat insulating box.

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