JP2013249975A - Refrigerator - 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.SOLUTION: The refrigerator 1 includes: an outer box 6 constituting an enclosure forming a 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 vacuum heat insulation members 16, 17, 17a arranged with the foam heat insulation material 11 within the heat insulation space 15 and attached either to the outer box 6 or to the inner box 7. In the vacuum heat insulation members 16, 17, 17a, an ear part 21 being a section to be formed when a covering material 20 is welded in molding is bent on the opposite attaching surface side to be overlapped on and fixed to the covering material 20, and the thickness of the section where the ear part 21 is overlapped is formed thinner than that of the sections of the other vacuum heat insulation materials 16, 17, 17a.

Description

  The present invention relates to a 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 that has started to foam in the heat insulation space of the heat insulation box (hereinafter referred to as foam) 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 as described above, so that the thickness of the cross-sectional area of the heat insulating space between the inner box and the outer box is 40 to 60 mm. When it is arranged so as to be stuck, there is a problem in that the vacuum heat insulating material impedes 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 void occurs.

  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 refrigerator which smoothes the flow of the foam heat insulating material 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 the refrigerator of the present invention includes an outer box that forms a casing that forms a heat insulating box, an inner box that forms a storage chamber, the outer box, and the inner box. A foam heat insulating material filled in a heat insulating space formed between the box and a vacuum heat insulating material disposed in the heat insulating space together with the foam heat insulating material and attached to the outer box or the inner box, The vacuum heat insulating material is a portion where the ear portion, which is formed when the outer jacket material is welded at the time of molding, is bent on the side opposite to the attachment surface and is fixed to the outer jacket material, and the ear portion is overlapped Is formed thinner than other portions of the vacuum heat insulating material.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which smoothes the flow of the foam heat insulating material 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. 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. (a) is a side view which shows the state which attached the vacuum insulation material of the comparative example (conventional) to the flat attachment surface, (b) attached the vacuum insulation material of the comparative example (conventional) to the attachment surface of a corner | angular part It is a side view which shows the state. (a) is a side view which shows the state which attached the vacuum heat insulating material of embodiment to the flat attachment surface, (b) is a side view which shows the state which attached the vacuum heat insulating material of embodiment to the attachment surface of a corner | angular part. It is.

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.

Hereinafter, as will be described, 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. An inner box-side vacuum heat insulating material 17 is attached to the inner box 7 in the heat insulating space 15. Further, a corner inner box vacuum heat insulating material 17 a is attached to the corner of the inner box 7 in the heat insulating space 15.
3 is a cross-sectional view taken along line BB in FIG.
A bottom plate 6d and a back plate 6e are connected to each rear end edge of the side plates 6a and 6b (above the side plates 6a and 6b in FIG. 3) and a rear end edge (not shown) of the top plate 6c. An H-shaped bent portion 8b that is folded back in triplicate is formed.

When the bottom plate 6d and the back plate 6e are assembled to the side plates 6a and 6b and the top plate 6c, the bottom plate 6d is attached to the H-shaped bent portions 8b provided at the respective rear edges of the side plates 6a and 6b and the top plate 6c. The side edge of the back plate 6e is inserted and assembled by screwing or screwing.
At the front end edge of the outer box 6 (the lower side of the outer box 6 in FIG. 3), 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, since it is necessary to insulate between the refrigerating room 2 in the refrigerating temperature zone and the freezing room 3 in the refrigerating temperature zone, the partition heat insulating wall 9 that partitions and insulates both the chambers (2, 3). Is provided.
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.

The partition heat insulation walls 9 and 10 are members formed in advance using a 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, It is fixed in place.
Thereafter, as described below, the foam insulation 11 is filled into the insulation space 15 in which the outer box / inner box side vacuum insulation 16 and 17 of the heat insulation box 1H1 and the corner inner box vacuum insulation 17a are attached. .

<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. 4 is a vertical cross-sectional view of an essential part showing by arrows the state in which polyurethane foam (foaming heat insulating material) is injected into the heat insulating box of the refrigerator and foamed. In FIG. 4, 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. 4). 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. 4). 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 (including the corner inner box vacuum heat insulating material 17a) attached to the outer box 6 and the inner box 7 in the heat insulating space 15 will be described in detail.
FIG. 5 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 constituting the 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. As the core material 19, for example, a plurality of glass wool layers each having a thickness of 30 cm are placed.

  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. 5, 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. .

Here, in the outer box side / inner box side vacuum heat insulating materials 16 and 17, the portion 19 a on the side opposite to the attachment surface where the bent ear portion 21 overlaps the outer jacket material 20 is formed thinly. The method of forming the outer cover material 20 so as to absorb the thickness of the ear portion 21 is the inclined surface shown in the figure or a stepped portion.
The inclined surface of the thin portion 19a is formed, for example, at the time of the pressure forming process to the predetermined shape described above.
The thin portion 19a has a stepped portion (not shown) in which, for example, five layers of glass wool are put in the outer casing side / inner box side vacuum heat insulating materials 16 and 17, and the thin portion 19a has four layers. Form.

Next, the features of the outer box side and inner box side vacuum heat insulating materials 16 and 17 (corner inner box vacuum heat insulating material 17a) of the embodiment will be compared with the vacuum heat insulating materials 116 and 117 of the comparative example (conventional) and will be described. .
First, the vacuum heat insulating materials 116 and 117 of the comparative example (conventional) will be described.
FIG. 6A is a side view showing a state in which the vacuum heat insulating material of the comparative example (conventional) is attached to a flat mounting surface, and FIG. It is a side view which shows the state attached to the attachment surface of a part.

The vacuum heat insulating material 116 shown in the comparative example (conventional) of FIG. 6A includes a core material 119 and the like in which the outer cover material 120 is encapsulated, and the ear portion 121 where the end portion of the outer cover material 120 is welded is the anti-attachment surface. The folded portion is attached to the main body portion with a fixing tape 122.
And an adhesive agent is apply | coated to the attachment surface of the vacuum heat insulating material 116 of this state, and it affixes on an attachment surface.

As described above, the ear 121 of the vacuum heat insulating material 116 is bent toward the non-attaching surface.
When the ear portion 121 is bent, if the thickness dimension d of the ear portion 121 of the vacuum heat insulating material 116 having the thickness dimension D is set, the total thickness of the vacuum heat insulating material 116 is D + d.
As shown in FIG. 6B, when the vacuum heat insulating material 117 is attached to a place where the mounting surface is bent, such as a corner of the inner box 7 in the heat insulating space 15, the thickness D is similarly applied. The total thickness dimension of the vacuum heat insulating material 117 having the thickness dimension d of the ear 121 of the vacuum heat insulating material 117 is D + d.

In other words, the vacuum heat insulating materials 116 and 117 made with a plate thickness of 10 mm increase the plate thickness by about 5 mm when the thickness dimension d of the ear portion 121 is 5 mm.
Therefore, when the vacuum heat insulating materials 116, 117 are arranged in the outer box 6, the inner box 7, and the corners of the inner box 7 in the heat insulating space 15 shown in FIG. The thickness of the ear 121 is further reduced by 5 mm (10 mm when attached to the left and right sides of the outer box 6 and the inner box 7).

For this reason, when using the vacuum heat insulating materials 116 and 117 to secure a clearance passage of 15 mm or more on both sides through which the foam of the foam heat insulating material 15 in the heat insulating space 15 flows, it is necessary to provide the heat insulating space 15 with a thickness of 45 mm or more on both sides. is there. This makes it difficult to apply the heat-insulating space 15 to the refrigerator 1 that is 40 mm thick on both sides to achieve volume efficiency.
The present embodiment solves this problem and attaches the outer box side vacuum heat insulating material 16 to the outer box 6, the inner box side vacuum heat insulating material 17, and the corner inner box vacuum heat insulating material 17 a to the inner box 7. This improves the pasting and placing work.

Next, the vacuum heat insulating material (16, 17, 17a) of the embodiment will be described.
Fig.7 (a) is a side view which shows the state which attached the vacuum heat insulating material of embodiment to the flat attachment surface, FIG.7 (b) attached the vacuum heat insulating material of embodiment to the attachment surface of a corner | angular part. It is a side view which shows the state.
The outer box side / inner box side vacuum heat insulating materials 16 and 17 and the corner inner box vacuum heat insulating material 17a are collectively referred to as a vacuum heat insulating material 16 (17) here.

As described above, in the vacuum heat insulating material 16 (17), the jacket material 20 encloses the core material 19 and the like, and the end portion of the jacket material 20 is welded. And the ear | edge part 21 formed by welding is turned back to the anti-attachment surface side, and the location turned back by the fixing tape 22 is attached to a main-body part.
Then, an adhesive such as hot melt is applied to the mounting surface of the vacuum heat insulating material 16 (17) in this state, and is attached (attached) to the outer box 6 or the inner box 7.

Here, in the vacuum heat insulating material 16 (17) shown in FIGS. 7A and 7B of the present embodiment, the meat of the vacuum heat insulating material 16 (17) in the portion where the bent ear portion 21 overlaps the jacket material 20. Form a thin thickness. Then, the ear portion 21 is folded and positioned at the thinned portion 19a, and the thickness is made almost the same as the central portion of the vacuum heat insulating material 16 (17), so that the other vacuum heat insulating materials 16 (17) have the same thickness. I try not to be thicker than the part.
As described above, a stepped portion or an inclined surface is formed as a thin means for absorbing the thickness of the thinned portion 19a where the ear portion 21 of the covering material 20 overlaps. The shape of the thinned portion 19a may have a curved surface.

As shown in FIG. 7B, when the mounting surface of the vacuum heat insulating material 16 (17) is a corner portion of the inner box 7, the covering material 20 is similar to the configuration of FIG. By reducing the thickness of the portion 19a where the ear portion 21 overlaps, the thickness of the central portion of the vacuum heat insulating material 16 (17) and the total thickness of the portion 19a where the ear portion 21 overlap can be made substantially the same.
As in FIG. 7A, a stepped portion or an inclined surface is formed as a thin means for absorbing the thickness of the thinned portion 19a where the ear portion 21 of the jacket material 20 overlaps.

As shown in FIG. 7A, the vacuum heat insulating material 16 (17) is a film-like protective material including the ear portion 21 and the tape 22 after the ear portion 21 is fixed to the thinly formed portion 19a with the tape 22. 28, the vacuum heat insulating material 16 (17) is covered. The protective material 28 is manufactured to about 0.5 mm using, for example, resin, vinyl, or the like. In addition, the thickness and material of the protective material 28 are arbitrary.
And an adhesive agent is apply | coated to the attachment surface side of the vacuum heat insulating material 16 (17) covered with the protective material 28, and it adheres to a desired attachment surface via an adhesive agent.

Similarly, when the mounting surface shown in FIG. 7B is a corner portion of the inner box 7, the vacuum heat insulating material 16 (17) formed by bending for the corner portion is similarly formed at the thin portion 19a. 21 is fixed with tape 22. Thereafter, the vacuum heat insulating material 16 (17) is covered with a film-shaped protective material 28 including the ear portion 21 and the tape 22.
And an adhesive agent is apply | coated to the attachment surface side of the vacuum heat insulating material 16 (17) covered with the protective material 28, and it adheres through the adhesive agent to the attachment surface of a desired corner | angular part.

According to the above-described configuration, the bent ear portion 21 is turned up by the pressure of the stock solution 13 (see FIG. 4) of the foam heat insulating material 11, and the gap dimension through which the stock solution 13 of the foam heat insulating material 11 flows is not changed.
Further, since the vacuum heat insulating material 16 (17) is covered with the protective material 28, the vacuum heat insulating material 16 is connected to the connecting H-shaped bent portion 8b or R-shaped bent portion 8a when being placed in the outer box 6 or the inner box 7. The probability of damaging (17) can be greatly reduced.

  In summary, since the refrigerator 1 has the configuration as described above, the following effects can be obtained.

A thin portion 19 a is formed in the refrigerator 1 in which a stepped portion or an inclined surface that absorbs the thickness of the ear portion 21 of the jacket material 20 is formed on the opposite side of the vacuum heat insulating material 16 (17).
Thereby, since the thickness of the vacuum heat insulating material 16 (17, 17a), which has been thick in the past, does not have to be changed by bending the ear portion 21, the ear portion 21 is insulated so that the stock solution 13 of the foam heat insulating material 11 flows. The space 15 is not narrowed.
In addition, a highly heat-insulating vacuum heat insulating material with good stacked storage of the vacuum heat insulating material 16 (17) can be obtained.

  Also, the vacuum insulating material 16 (17, 17) is formed by bending the ear portion 21 of the jacket material 20 formed at the time of forming the vacuum heat insulating material 16 (17) to the side opposite to the attachment surface and fixing it to the jacket material 20. 17a), the thickness (thickness dimension) of the vacuum heat insulating material 16 (17) at the portion 19a where the ear portion 21 is overlapped is formed thin, and the ear portion 21 is positioned and overlapped at this thinly formed portion 19a. A protective material 28 that covers the ear portion 21 is provided on the surface opposite to the surface of the vacuum heat insulating material 16 (17).

As a result, the bent ears 21 are not turned up by the pressure of the undiluted solution 13 when the foam heat insulating material 11 is filled, and the gap size through which the foam heat insulating material 11 flows is not changed.
Further, since the vacuum heat insulating material 16 (17) including the ear portion 21 is covered with the protective material 28, when the vacuum heat insulating material 16 (17) is arranged in the outer box 6 or the inner box 7, an H shape for connection is used. The probability of damaging the vacuum heat insulating material 16 (17) at the bent portion 8b (see FIG. 3) or the R-shaped bent portion 8a can be greatly reduced.

<< 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.
Moreover, although the said embodiment demonstrated regarding the structure of the refrigerator compartment 2, the same structure is applicable also to the freezer compartment 3 and the vegetable compartment 4. FIG.
In the above-described embodiment, various configurations have been described, but these may be combined as appropriate.

  Moreover, although the said embodiment demonstrated and demonstrated the refrigerator 1 which has the freezer compartment 3, the refrigerator compartment 2, and the vegetable compartment 4, the structure demonstrated also to the refrigerator which consists of a refrigerator compartment, and the freezer consisting of a freezer compartment suitably. Applicable.

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 11 Foam heat insulating material 15 Heat insulation space 16 Outer box side vacuum heat insulating material (vacuum heat insulating material)
17 Inner box side vacuum insulation (vacuum insulation)
17a Corner inner box vacuum insulation (vacuum insulation)
19a Location where ears are stacked 20 Outer material 21 Ears 28 Protective material

Claims (3)

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 a vacuum heat insulating material attached to the outer box or the inner box,
As for the said vacuum heat insulating material, the ear | edge part which is a location formed when welding a jacket material at the time of shaping | molding is bend | folded to the anti-attachment surface side, is piled up and fixed to a jacket material, and the said ear | edge part is piled up. The refrigerator is characterized in that the thickness of the portion is formed thinner than the other portions of the vacuum heat insulating material. The refrigerator according to claim 1, wherein the vacuum heat insulating material is thinly formed with a stepped portion or an inclined surface where the ear portion is overlapped. The refrigerator according to claim 1, further comprising: a protective material that covers the vacuum heat insulating material including the ear portion on a side opposite to the attachment surface of the vacuum heat insulating material.

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