JP7324730B2 - Refrigerator and manufacturing method - Google Patents

Description

The present invention relates to refrigerators and manufacturing methods.

Generally, a refrigerator has a vacuum heat insulating material placed in the space formed between the inner and outer boxes of the refrigerator in order to save energy and expand the effective space inside the refrigerator. A space formed between the inner box and the outer box is filled with foam insulation. Since the vacuum heat insulating material is usually wrapped with a thin resin sheet, there is a possibility that the material may be damaged if it is damaged during manufacturing or if it is subjected to a strong impact during use.

Conventionally, the technique disclosed in Patent Document 1 is known as a technique for preventing breakage of a vacuum heat insulating material. Patent Literature 1 includes a protective case that accommodates a vacuum heat insulating material. After the vacuum heat insulating material is housed in the protective case, it is attached to the inside of the outer box. The space formed between the inner box and the outer box is filled with foamed heat insulating material to cover the protective case (see, for example, Patent Document 1).

JP 2016-173187 A

The refrigerator of Patent Document 1 described above is configured to cover the protective case by filling the space formed between the inner box and the outer box with a foamed heat insulating material, so the heat insulating property of the protective case itself is not taken into consideration. Ta. Therefore, there is a risk that sufficient heat insulation cannot be obtained due to heat bridges in the protective case.

In addition, due to the uneven shape of the outer surface of the inner box, there is a risk that a gap that is not filled with the foamed heat insulating material may be formed between the inner box and the protective case, possibly resulting in a decrease in heat insulation. For this reason, it is necessary to secure a large space between the inner box and the protective case, and there is a risk that the size of the refrigerator will increase.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a refrigerator and a method of manufacturing the refrigerator, which can protect the vacuum insulation material, prevent thermal bridges, improve heat insulation, and reduce the size of the refrigerator.

In order to solve the above problems, the refrigerator of the present invention includes an inner box, an outer box covering the inner box, a space formed between the inner box and the outer box, and arranged in the space, wherein the a foam heat insulating protective material attached to the inner box, the foam heat insulating protective material having a plate-like vacuum heat insulating material and a foam heat insulating material supporting at least a part of the vacuum heat insulating material. , the foam heat insulating protective material is attached to the inner box via the foam heat insulating material . The foamed heat insulating material covers the ends of the vacuum heat insulating material, and the vacuum heat insulating material faces the inner box and the outer box with a gap formed between them. The gap formed between is smaller than the gap formed between the outer box .

ADVANTAGE OF THE INVENTION According to this invention, the refrigerator and manufacturing method which can prevent a heat bridge|bridging, can improve heat insulation property, and can achieve size reduction, while protecting a vacuum heat insulating material are obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the whole refrigerator which concerns on 1st Embodiment of this invention. It is a model front view of a refrigerator concerning a 1st embodiment of the present invention. It is a model side view of a refrigerator concerning a 1st embodiment of the present invention. FIG. 3 is a schematic enlarged cross-sectional view along line IV-IV shown in FIG. 2 of the refrigerator according to the first embodiment of the present invention; FIG. 4B is a partially enlarged sectional view of FIG. 4A of the refrigerator according to the first embodiment of the present invention; FIG. 4 is a schematic explanatory diagram showing how the foam heat insulating protective material provided in the refrigerator according to the first embodiment of the present invention is formed. FIG. 4 is a schematic cross-sectional view along line VI-VI shown in FIG. 3 of the refrigerator according to the first embodiment of the present invention; FIG. 3 is a partially enlarged cross-sectional view showing the structure of the corner portion of the inner box of the refrigerator according to the first embodiment of the present invention; FIG. 4 is a partially enlarged cross-sectional view showing a modification of the structure of the corner portion of the inner box of the refrigerator according to the first embodiment of the present invention; 4B is a schematic enlarged cross-sectional view corresponding to the schematic enlarged cross-sectional view of FIG. 4A in the refrigerator according to the second embodiment of the present invention. FIG. FIG. 4B is a schematic enlarged cross-sectional view corresponding to the schematic enlarged cross-sectional view of FIG. 4A in the refrigerator according to the third embodiment of the present invention; FIG. 4 is a partially enlarged cross-sectional view showing a first modification of the structure of the corner portion of the inner box of the refrigerator according to the second and third embodiments of the present invention; FIG. 8 is a partially enlarged cross-sectional view showing a second modification of the structure of the corner portion of the inner box of the refrigerator according to the second and third embodiments of the present invention; FIG. 11 is a partially enlarged cross-sectional view showing a third modification of the structure of the corner portion of the inner box of the refrigerator according to the second and third embodiments of the present invention; It is a schematic cross section equivalent to the schematic cross section of FIG. 6 of the refrigerator which concerns on 4th Embodiment of this invention. FIG. 11 is a perspective view showing the assembly structure of the vacuum heat insulating material to the foam heat insulating protective material on the lower side of the refrigerator according to the fourth embodiment of the present invention; It is a perspective view which shows the assembly|attachment structure of a comparative example. It is a model sectional side view which shows the structure of the refrigerator which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the 1st process of the manufacturing method of the refrigerator which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the 2nd process of the manufacturing method of the refrigerator which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the 3rd process of the manufacturing method of the refrigerator which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the 4th process of the manufacturing method of the refrigerator which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the 5th process of the manufacturing method of the refrigerator which concerns on 4th Embodiment of this invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. The same reference numerals are given to the same parts in each embodiment, and overlapping explanations are omitted. In the description of the embodiments, the terms "back and forth", "left and right", and "up and down" are based on the directions shown in FIG.

FIG. 1 is a schematic configuration diagram showing the entire refrigerator, FIG. 2 is a schematic front view of the same, and FIG. 3 is a schematic side view of the same. Refrigerator 1 has a vertically long box shape, as shown in FIGS. The refrigerator 1 includes an inner box 2 indicated by a dotted line in the figure, an outer box 3 arranged outside the inner box 2 with a gap from the inner box 2, and an opening/closing door 4 attached to the front surface of the outer box 3. , is equipped with As shown in FIG. 3, the refrigerator 1 has a storage portion 1a formed between an inner box 2 and an outer box 3 in the lower portion of the rear portion. A cooling means (not shown) such as a refrigerator is accommodated in the accommodating portion 1a. The refrigerator 1 can cool the interior 20a formed with the inner walls of the inner surfaces of the inner box 2 by driving the cooling means. A refrigerator compartment, a freezer compartment, and the like are provided in the inside 20a. In addition, FIG. 1 omits illustration of the accommodating portion 1a.

The inner box 2 is an integrally molded product made of a synthetic resin material and has an open front surface. In addition, the inner box 2 is not limited to an integrally molded product, and may be configured by combining a plurality of members.

The outer box 3 includes an upper plate 3a arranged above the inner box 2, a lower plate 3b arranged below, a left plate 3c arranged on the left, a right plate 3d arranged on the right, and a It is configured with a rear plate 3e to be arranged. Each of the plates 3a to 3e is made of a metal material or a resin material, and the outer case 3 is formed by connecting adjacent plates. In addition, the outer box 3 may be integrally provided with a part of the adjacent plates, or may be formed integrally with a resin material.

A space S1 is formed over the entire refrigerator 1 between the inner box 2 and the outer box 3 . FIG. 4A shows the space S1 on the right side and the space S1 on the rear side. A foam heat insulating protective material (a block-shaped member having heat insulating properties) 10 is arranged in each space S1. The foam heat insulating protective material 10 is attached so as to be in close contact with the inner box 2 (the right plate 2d and the rear plate 2e in FIG. 4A) in all the spaces S1. The foam heat insulating protective material 10 faces the outer casing 3 (the right plate 3d, the rear plate 3e) with a gap formed between them and the inner surface of the outer casing 3 while being separated therefrom. Here, the spacing means that an adhesive, air, or the like can be interposed between the foam heat insulating protective material 10 and the outer box 3, and the foam heat insulating protective material 10 can be locked by frictional force when the outer box 3 is pressed. (On the other hand, as in the case of filling the foamed heat insulating material, the state where the foamed heat insulating protective material 10 itself is locked to the outer casing 3 by the adhesive strength is not separated). As a result, the foamed heat insulating protective material 10 can be assembled to the inner box 2 prior to the outer box 3, facilitating assembly.

The foam heat insulating protective material 10 has a flat plate shape, and is obtained by covering a plate-like vacuum heat insulating material 11 with a foam heat insulating material 12 . The vacuum heat insulating material 11 is wrapped with a thin resin sheet, and has ears 11s formed by folding back the resin sheet. The ear portion 11s is arranged on the outer case 3 side opposite to the inner case 2 . As a result, the entire surface of the foamed heat insulating protective material 10 facing the inner box 2 can be formed flat without steps, and the adhesion to the inner box 2 can be enhanced.

In the right corner portion 2f of the inner box 2, the rear and right foam heat insulating protective materials 10 are attached to the right side 10e of the rear foam heat insulating protective material 10 and the left side of the rear portion 10f of the right foam heat insulating protective material 10. 10g are in contact with each other. That is, since the flat left side surface of the right side foam heat insulating protective material 10 is pressed against the right side surface 10e of the foam heat insulating protective material 10 on the rear side, it is easy to absorb manufacturing variations, and the adhesion between the foam heat insulating protective material 10 is improved. increases. This structure also applies to the left corner of the inner box 2 (not shown).

The thickness of the foamed heat insulating material 12 in the foamed heat insulating protective material 10 on the right side satisfies the relationship of t1≧t2 when the thickness of the inner box 2 side is t1 and the thickness of the outer box 3 side is t2 with the vacuum heat insulating material 11 as the center. is set. As a result, even if warping occurs due to contraction of the foamed heat insulating protective material 10, the right side surface of the foamed heat insulating protective material 10 on the right side can be kept in contact with the right side surface 10e of the foamed heat insulating protective material 10 on the rear side. can be done.

In addition, at the corner portion 2f of the inner box 2, the vacuum heat insulating materials 11 of the foam heat insulating protective material 10 on the rear side and on the right side are arranged such that at least a portion thereof overlaps in the left-right direction. That is, the vacuum heat insulating material 11 of the foam heat insulating protective material 10 on the right side is positioned on the extension of one side surface of the vacuum heat insulating material 11 of the rear foam heat insulating protective material 10 in the adjacent foam heat insulating protective material 10 . This structure is the same for the left corner portion (not shown) of the inner box 2 .

As shown in FIG. 7A, the foam heat insulating protective material 10 on the rear side has extensions 10j that extend toward the outer surface of the corners 2f of the inner box 2 and are in close contact with the outer surface. Also, the rear end portion of the abutting portion (the abutting surface between the right side 10e and the left side 10g) between the rear foam heat insulating protective material 10 and the right foam heat insulating protective material 10 is sealed with an adhesive 16. As shown in FIG. Examples of the adhesive 16 include hot melt and urethane. This structure is the same for the left corner portion (not shown) of the inner box 2 .

The front end of the foamed heat insulating protective material 10 on the right side is in close contact with the inner surface of the bent portion 2g that continues to the front end of the right plate 2d of the inner box 2. As shown in FIG. This structure also applies to the front end portion of the left plate 2c (not shown) of the inner box 2. As shown in FIG. As a result, by pressing forward from the rear end portion of the foamed heat insulating protective material 10, the bent portion 2g and the outer case 3 can be brought into close contact with each other to ensure strength.
The tight contact structure of the foam heat insulating protective material 10 with respect to the inner box 2 is constituted by the adhesion of the foam heat insulating protective material 10 to the inner box 2 and the adhesive 16 at each butt portion as described above.

In the space S1 between the inner case 2 and the outer case 3, inside the outer case 3, a heat radiation pipe 4A is arranged with a predetermined interval in the front-rear direction. The heat radiation pipe 4A is configured so that a gas or coolant having a temperature higher than the temperature in the space S1 flows. As a result, it is possible to prevent condensation from forming on the outer case 3 .
Note that the front end of the vacuum heat insulating material 11 of the foam heat insulating protective material 10 on the right side is positioned behind the heat radiating pipe 4A arranged at the front end of the outer casing 3 among the heat radiating pipes 4A. In other words, while the foam heat insulating protective material 10 or the inner box 2 is interposed between the vacuum heat insulating material 11 and the outer box 3, the heat radiation pipe 4A arranged at the front end portion of the outer box 3 is bordering on 3. This is because the foamed heat insulating material 12, which has a higher thermal conductivity, leaks more heat from the inside to the outside than the vacuum heat insulating material 11, and the front end portion 3g of the outer case 3 cools down and tends to condense. This is because arranging the radiating pipe 4A in this portion is effective in transferring heat from the radiating pipe 4A to the front end portion 3g to prevent dew condensation.

Next, the molding direction of the foam heat insulating protective material 10 will be described with reference to FIG. The foam heat insulating protective material 10 is formed by disposing a vacuum heat insulating material 11 in a rectangular parallelepiped molding case (mold) 15, and forming a foam heat insulating material 12 in the molding case 15 through injection ports 15a, 15a of the molding case 15. It is formed by injecting an agent and foaming it.

The vacuum heat insulating material 11 is arranged in the molding case 15 with the side located on the rear surface facing up when the foam heat insulating protective material 10 is attached to the inner box 2 . This is because the rear surface side has a portion that overlaps with other vacuum insulation materials 11, so even if the protective layer of the foam insulation material 12 becomes thicker due to manufacturing error, the adjacent rear vacuum insulation material 11 will not cause heat leakage. This is because it can be suppressed. On the front side, it is difficult to suppress heat leakage with the adjacent vacuum heat insulating material 11, so it is preferable to form the layer of the foam heat insulating protective material 10 as thin as possible.

The vacuum heat insulating material 11 is held in the molding case 15 via a substantially truncated conical holding member 13 . The holding member 13 is attached to the side surface of the vacuum heat insulating material 11 with an adhesive, and its attachment position is on the axis O2 which is a distance L1 away from the axis O1 passing through the inlet 15a. The distance L1 is set to prevent the filler injected from the injection port 15a from hitting the holding member 13 directly. This prevents the holding member 13 from dropping off from the side surface of the vacuum heat insulating material 11 due to the resistance of the injected filler.

The side surface of the holding member 13 forms an obtuse angle α1 with the mounting surface of the vacuum heat insulating material 11, as shown in FIG. 4B. As a result, the filler flows into the portion having the obtuse angle α1, and voids are less likely to occur. Moreover, the holding member 13 is attached to both surfaces of the vacuum heat insulating material 11 . A central axis O3 of the holding members 13 , 13 is perpendicular to the central line O4 of the vacuum heat insulating material 11 . By configuring the holding members 13 on both sides of the vacuum heat insulating material 11 in this way, when the foam heat insulating protective material 10 is molded, both sides of the vacuum heat insulating material 11 can receive the external force evenly during molding. 11 can be prevented from being biased to either side in the axial direction of the central axis O3.

FIG. 6 is a schematic cross-sectional view of the refrigerator along line VI-VI shown in FIG. The left foam thermal insulation protection material 10 covers the left side surface 10a of the upper and lower foam thermal insulation protection materials 10, and the right foam thermal insulation protection material 10 covers the upper and lower foam thermal insulation protection materials 10. It covers the right side 10b. This prevents the loads of the left and right foam heat insulating protective materials 10 from acting on the vacuum heat insulating material 11 and the foam heat insulating protective material 12 of the lower foam heat insulating protective material 10 . Since the upper foamed heat insulating protective material 10 is placed on the upper plate 2a of the inner box 2, it is stably supported on the upper surface of the upper plate 2a. Therefore, it is easy to install.

Refrigerator 1 as described above is manufactured by the steps of forming foam heat insulating protective material 10 described below, attaching foam heat insulating protective material 10 to inner box 2, and covering inner box 2 with outer box 3. manufactured.

The step of forming the foamed heat insulating protective material 10 is a step of forming the foamed heat insulating protective material 10 with the molded case 15 described above. That is, in this step, the foamed heat insulating protective material 10 is formed by covering the entirety of the vacuum heat insulating material 11 arranged in the molded case 15 with the foamed heat insulating material 12 formed by foaming the filler.

The step of attaching the foamed heat insulating protective material 10 to the inner box 2 is a step of attaching the foamed heat insulating protective material 10 formed in the above process to the inner box 2 via the foamed heat insulating material 12 . In this case, the foam heat insulating protective material 10 can be fixed to the inner box 2 via the foam heat insulating material 12 by using an adhesive or the like. In addition, since the foam heat insulating protective material 10 can be attached to the inner box 2 before the outer box 3 is attached, the attachment work can be easily performed, and productivity can be improved.

The step of covering the inner box 2 with the outer box 3 is the step of attaching the outer box 3 to the inner box 2 to which the foamed heat insulating protective material 10 has been attached in the above step. Since the foam heat insulating protective material 10 is already attached to the inner box 2 in the above process, the outer box 3 can be easily attached from the outside of the foam heat insulating protective material 10. - 特許庁Therefore, the mounting work can be easily performed, and productivity can be improved.

FIG. 7B is a partially enlarged sectional view showing a modification of the structure of the corner portion 2f of the inner box 2. FIG. In this modified example, the extending portion 10j (see FIG. 7A) is removed from the foam heat insulating protective material 10 on the rear side, and the rear foam heat insulating protective material 10 and the right foam heat insulating protective material 10 are butted against each other. be. Also in this modification, the rear end portion of the abutting portion (the abutting surface between the right side surface 10e and the left side surface 10g) of the foam heat insulating protective material 10 on the rear side and the foam heat insulating protective material 10 on the right side is sealed with the adhesive 16. are doing. This structure is the same for the left corner portion (not shown) of the inner box 2 .

In the refrigerator 1 of the present embodiment described above, the foam heat insulating protective material 10 including the vacuum heat insulating material 11 and the foam heat insulating material 12 is attached to the inner box 2 via the foam heat insulating material 12. Therefore, the vacuum heat insulating material 11 heat bridges can be suppressed.

In addition, since the foamed heat insulating protective material 10 is foamed separately from the inner box 2 and the outer box 3, the space between the inner box 2 and the outer box 3 is directly filled with the foamed heat insulating material as in the conventional structure. The heat insulation structure can be made thinner and more compact than in the case of Therefore, the inside 20a can be made wider by that amount.

In addition, since the foamed heat insulating protective material 10 itself has a heat insulating property, there is no need to dispose another heat insulating material separately, and it is easy to expand the space of the inside 20a.

In addition, an elastic foam heat insulating protective material absorbs deformation between the inner box 2 and the vacuum heat insulating material 11, which have a large difference in thermal contraction rate. Therefore, the shearing force applied to the vacuum heat insulating material 11 can be reduced, and the productivity is excellent.

In addition, even if the integrally molded inner box 2 has rounded corners 2f or a draft angle, the inner box has an inner box close contact structure in which the foamed heat insulating protective material 10 is in close contact with the inner box 2. Outside air can be prevented from entering between the box 2 and the vacuum heat insulating material 11.例文帳に追加This eliminates the need to fill the space S1 between the inner box 2 and the outer box 3 with urethane foam or the like. Therefore, it is easy to widen the space of the inside 20a.

In addition, in the adjacent foam heat insulating protective material 10, the vacuum heat insulating material 11 of the right foam heat insulating protective material 10 is positioned on the extension of one side surface of the vacuum heat insulating material 11 of the rear foam heat insulating protective material 10. This improves heat insulation.

In addition, the foam heat insulating protective materials 10, 10 attached to the left plate 2c and the right plate 2d of the inner box 2 are attached to the upper plate 2a and the lower plate 2b, and the left and right side portions 10a, 10b of the foam heat insulating protective materials 10, 10 are attached to the upper plate 2a and the lower plate 2b. covering. Thereby, it is possible to prevent the loads of the left and right foam heat insulating protective materials 10 from acting on the vacuum heat insulating material 11 and the foam heat insulating protective material 12 of the lower foam heat insulating protective material 10 .

Further, according to the manufacturing method of the refrigerator 1, the foam heat insulating protective material 10 can be fixed to the inner box 2 via the foam insulating material 12, and the foam heat insulating protective material 10 can be attached to the inner box 2 before the outer box 3 is attached. can be attached, the attachment work can be easily performed, and productivity can be improved.

(Second embodiment)
A refrigerator according to the second embodiment will be described with reference to FIG. FIG. 8 is a schematic enlarged sectional view corresponding to the schematic enlarged sectional view of FIG. 4A described above. The difference of this embodiment from the first embodiment is that the foam heat insulating protective material 10B is attached to the inner box 2 via foam heat insulating materials 18g and 18f covering both ends of the vacuum heat insulating material 11. .

As shown in FIG. 8, the right foam heat insulating protective material 10B includes the vacuum heat insulating material 11, the foam heat insulating material 18f covering the rear end 11f of the vacuum heat insulating material 11, and the foam heat insulating material 18f covering the front end 11g of the vacuum heat insulating material 11. and 18 g of heat insulating material. Each of the foamed heat insulating materials 18f and 18g is foam-molded in advance, and is attached to the inner box 2 by sealing the edges with the inner box 2 with an adhesive 16. - 特許庁The foam heat insulating material 18f on the rear side has a groove portion 18f1 into which the rear end portion 11f of the vacuum heat insulating material 11 is inserted. On the other hand, the foamed heat insulating material 18g on the front side has a groove portion 18g1 into which the front end portion 11g of the vacuum heat insulating material 11 is inserted.

The foam heat insulating material 18g on the rear side is attached so as to be in close contact with the corner portion 2f of the inner box 2, and has a groove portion 18f2 into which the right end portion 11e of the foam heat insulating protective material 10B arranged on the rear side is inserted. . In other words, the rear foam heat insulating material 18g functions as a supporting portion that supports both the right side and the rear foam heat insulating protective material 10B.

The rear end portion 11f of the vacuum heat insulating material 11 is inserted into the groove portion 18f1 of the foam heat insulating material 18f on the rear side, and the front end portion 11g of the vacuum heat insulating material 11 is inserted into the groove portion 18g1 of the foam heat insulating material 18g on the front side. It is attached to the inner box 2 via. Boundary portions (edge portions) between the grooves 18f1 and 18g1 located on the outer casing 3 side and the vacuum heat insulating material 11 are sealed with an adhesive 16. As shown in FIG. Similarly, in the foamed heat insulating protective material 10B on the rear side, the boundary portion (edge portion) between the groove portion 18f2 located on the outer box 3 side and the vacuum heat insulating material 11 is sealed with the adhesive 16. As shown in FIG.

The vacuum heat insulating material 11 of the foam heat insulating protective material 10B on the right side faces the right plate 2d of the inner box 2 with a gap S1a formed therebetween. On the other hand, the vacuum heat insulating material 11 faces the right plate 3d of the outer case 3 with a gap S1b formed therebetween. The gap S1a facing the inner box 2 is smaller than the gap S1b facing the outer box 3.
Similarly, the vacuum heat insulating material 11 of the foam heat insulating protective material 10B on the rear side faces the rear plate 2e of the inner box 2 with a gap S2a formed therebetween. On the other hand, the vacuum heat insulating material 11 faces the rear plate 3e of the outer case 3 with a gap S2b formed therebetween. Also in this case, the gap S2a facing the inner box 2 is smaller than the gap S2b facing the outer box 3. Such a structure also applies to the left corner portion (not shown) of the inner box 2 .

In the present embodiment described above, the foam heat insulating protective material 10B is attached to the inner box 2 via the foam heat insulating materials 18g and 18f that cover both ends of the vacuum heat insulating material 11. As shown in FIG. Therefore, the mounting structure can be configured with a smaller amount of foamed heat insulating materials 18g and 18f than in the first embodiment, and the cost can be reduced.

In addition, since the vacuum heat insulating material 11 to be held faces the right plate 2d of the inner box 2 through the gap S1a, the variation in the dimensions of the inner box 2, etc. in terms of manufacturing is greater than in the case of the first embodiment. It has a high degree of freedom to allow , and is excellent in manufacturability. Moreover, the stress acting on the vacuum heat insulating material 11 can be reduced by providing the gap S1a. Thereby, the function of the vacuum heat insulating material 11 can be maintained for a long period of time.

In addition, since the gap S1a is sealed with the adhesive 16, the outside air is preferably prevented from entering the gap S1a. Since the adhesive 16 is applied to the surface facing the outer box 3, the inner box 2, the vacuum insulation material 11, and the outer box 3 can be assembled in this order. As described above, in the present embodiment, the adhesive 16 is provided with two functions, that is, the function of bonding and the function of sealing, so that the productivity is excellent. Moreover, since the adhesive 16 can be applied from the outside of the inner box 2, workability is excellent.

In addition, since the gap S1a is smaller than the gap S1b on the opposite side, the pressure change can be kept small. As a result, deformation of the inner box 2 due to negative pressure during cooling can be suitably prevented. Moreover, since the gap S2b is larger than the gap S1a, the heat dissipation can be improved. Moreover, the installation property of the heat radiation pipe 4A is also good.

In addition, in the present embodiment, the assembling is described in which the foam insulating materials 18f and 18g are attached to the inner box 2 first and then the vacuum insulating material 11 is attached, but the present invention is not limited to this. For example, the foam heat insulating protective material 10B may be attached to the inner box 2 after the foam heat insulating materials 18f and 18g and the vacuum heat insulating material 11 are assembled first to form the foam heat insulating protective material 10B first.

(Third Embodiment)
A refrigerator according to the third embodiment will be described with reference to FIG. FIG. 9 is a schematic enlarged sectional view corresponding to the schematic enlarged sectional view of FIG. 4A described above. The difference of this embodiment from the second embodiment is that both ends of the vacuum heat insulating material 11 are attached to the inner box 2 via the adhesive portions 17 . At least a portion (upper portion, lower portion, etc.) of the vacuum heat insulating material 11 is attached to the inner box 2 via a foam heat insulating material 12 (not shown).

Adhesive means such as urethane foam, hot-melt, and double-sided tape can be used as the adhesive portion 17 . In this embodiment, at the corner portion 2 of the inner box 2, the rear end portion 11f of the right vacuum heat insulating material 11 and the right end portion 11e of the rear vacuum heat insulating material 11 are attached to the inner box 2 via the adhesive portion 17. Furthermore, the outside thereof is covered with a foamed heat insulating material 18 having a substantially L-shaped cross section. The foam heat insulating material 18 has a right portion 18a arranged on the right plate 3d side and a rear portion 18b arranged on the rear plate 3e side.

At the corner portion 2f of the inner box 2, the bonding portion 17 includes an extension portion 19b interposed in the gap S1a, an extension portion 19d interposed in the gap S2a, and a rear end portion 11f of the vacuum heat insulating material 11 on the right side, and foam insulation. An extending portion 19a interposed between the right portion 18a of the material 18 and an extending portion 19c interposed between the right end portion 11e of the vacuum heat insulating material 11 on the rear side and the rear portion 18b of the foam heat insulating material 18. ing. In addition, the adhesive portion 17 covers the area around the front end portion 11g of the vacuum heat insulating material 11 on the right side, between the extending portion 19b interposed in the gap S1a and the bent portion 2g, and covers the right plate 3d side of the outer case 3. It has an extension 19f.

In the embodiment described above, the end of the vacuum heat insulating material 11 can be easily adhered to the inner case 2 via the adhesive portion 17 . In addition, the bonding portion 17 can be easily arranged in a gap or the like, and has a high degree of freedom in shape. Excellent adhesion and sealing properties. In addition, the shape of the foamed heat insulating material 18 is simplified to facilitate common use. Therefore, it is excellent in manufacturability.

FIG. 10A is a partially enlarged cross-sectional view showing a first modification of the structure of the corner portion 2f of the inner box 2. FIG. In this first modification, the rear end portion 11f and the right end portion 11e of the vacuum heat insulating material 11 are covered with the foam heat insulating material 18, and the rear vacuum heat insulating material 11 is placed in contact with the rear plate 2e of the inner box 2. The right vacuum heat insulating material 11 is arranged on the inner surface 10h of the right plate 2d of the inner box 2 with a slight gap.

In this first modified example, the foamed heat insulating material 18 is arranged only at the ends, so that the material cost can be reduced, and the cost can be reduced.

FIG. 10B is a partially enlarged cross-sectional view showing a second modification of the structure of the corner portion 2f of the inner box 2. FIG. In this second modification, the rear end portion 11f and the right end portion 11e of the vacuum heat insulating material 11 are fixed by the bonding portion 17, and the outside thereof is covered with the foam heat insulating material 18. As shown in FIG.

In this second modification, the vacuum heat insulating material 11 can be fixed first by the bonding portion 17, so that assembly is easy and productivity is excellent. The adhesive portion 17 does not necessarily have to be located at the corner portion 2f of the inner box 2, and the same effect can be obtained by providing it at least in part of the vacuum heat insulating material 11. As shown in FIG.

FIG. 10C is a partially enlarged cross-sectional view showing a third modification of the structure of the corner portion 2f of the inner box 2. FIG. In this third modification, the vacuum heat insulating material 11 and the foam heat insulating material 18 are adhered together at the adhesion portion 17 .

In this third modification, the vacuum heat insulating material 11 and the foam heat insulating material 18 can be adhered simultaneously at the adhesion portion 17, so that the number of work steps can be reduced.

(Fourth embodiment)
A refrigerator according to the fourth embodiment will be described with reference to FIGS. 11A to 11D. FIG. 11A is a schematic cross-sectional view corresponding to the schematic cross-sectional view of FIG. 6 of the refrigerator according to the fourth embodiment of the present invention. This embodiment differs from the first to third embodiments in that grooves 10k are provided in the lower foam heat insulating protective material 10A and the upper foam heat insulating protective material 10C, and the left and right vacuum heat insulating materials 11 are assembled. It is a point.

As shown in FIG. 11A, the lower foamed heat insulating protective material 10A is provided with a vacuum heat insulating material 11 on the top and covered with a foamed heat insulating material 12 on the lower side. A lower plate 2 b of the inner box 2 is in contact with the vacuum heat insulating material 11 . As shown in FIG. 11D, the foamed heat insulating protective material 10A on the lower side rises upward in a stepped manner on the rear side corresponding to the outer shape of the inner box 2. As shown in FIG. The vacuum heat insulating material 11 also rises in a substantially L shape when viewed from the side. The foam heat insulating protective material 10A is interposed between the vacuum heat insulating materials 11 and between the vacuum heat insulating material 11 and the inner box 2, so that a vacuum is generated from the inside of the inner box 2 to the outside of the outer box 3. Heat insulation can be ensured even when wiring or piping is passed through between the heat insulating materials 11 .

As shown in FIG. 11A, grooves 10k are formed on the left and right sides of the lower foamed heat insulating protective material 10A. Lower ends 11b of left and right vacuum heat insulating materials 11B are inserted into the respective grooves 10k (see FIG. 11D).

As shown in FIG. 11A, the upper foam heat insulating protective material 10C is provided with a vacuum heat insulating material 11 at the bottom. As shown in FIG. 11D, the foamed heat insulating protective material 10C on the upper side has a foamed heat insulating material 18C that covers the vacuum heat insulating material 11 and is divided into front and rear parts. A groove portion 18n into which the vacuum heat insulating material 11 is inserted is formed in the foam heat insulating material 18C on the rear side.

As shown in FIG. 11A, grooves 10k are similarly formed on the left and right sides of the upper foamed heat insulating protective material 10C. Upper ends 11a of left and right vacuum heat insulating materials 11B are inserted into the respective grooves 10k (see FIG. 11D).

The left and right vacuum heat insulating materials 11B are opposed to the inner box 2 (left plate 2c, right plate 2d) with a gap S1a.

Further, a groove portion 18p into which the upper end portion 11p of the vacuum heat insulating material 11D on the rear side is inserted is formed in the foam heat insulating protective material 10C on the upper rear side. The lower end portion 11r of the vacuum heat insulating material 11D on the rear side is inserted into a groove portion 18r provided at the rear end portion of the foam heat insulating protective material 10A on the lower side. The vacuum heat insulating material 11D faces the inner box 2 (rear plate 2e) with a gap S6, and the lower side of the gap S6 is surrounded by the foam heat insulating protective material 10A. As a result, even if there are wires or pipes on the rear plate 2e, holes can be provided in the foam heat insulating protective material 10A without making holes in the vacuum heat insulating material 11, and they can be arranged.

FIG. 11B is a perspective view showing an assembly structure of the vacuum heat insulating material 11B. The vacuum heat insulating material 11B on the right side can be easily inserted from above into the groove 10k of the foam heat insulating protective material 10A on the lower side. Since the boundary between the edge of the groove 10k and the vacuum heat insulating material 11B on the right side is located on the side (outside) covered by the right plate 3d (see FIG. 11A) of the outer case 3, the adhesive 16 is applied to this boundary. can be easily applied. In other words, the application work of the adhesive 16 can be performed without tilting the inner box 2 while the inner box 2 is kept upright.

If, as shown in FIG. 11C, in an arrangement structure in which the foam heat insulating protective material 10A is positioned on the right side and the vacuum heat insulating material 11B is positioned on the lower side, the groove portion 10k opens toward the left side. The boundary portion with the side vacuum heat insulating material 11B is located on the lower side. Therefore, when applying the adhesive 16 to this boundary portion, it is necessary to apply the adhesive 16 from the lower side.

In the refrigerator 1 as described above, a process of disposing the lower foam heat insulating protective material 10A, a process of disposing the inner box 2, a process of disposing the left and right vacuum heat insulating materials 11, and a process of disposing the upper foam heat insulating protective material 10C are performed. It is manufactured by a process and a process of arranging the outer case 3 .

12A, the lower plate 3b of the outer box 3 is placed on the floor or the like, and the lower foam heat insulating protective material 10A is placed thereon. This is the step of arranging. The foam heat insulating protective material 10A on the lower side is arranged so that the vacuum heat insulating material 11 is positioned on the upper side.

The process of arranging the inner box 2 is a process of placing the inner box 2 on the lower foam heat insulating protective material 10A arranged in the above process. In this step, as shown in FIG. 11D, the stepped lower plate 2b of the inner box 2 is placed along the upper surface (upper surfaces 2e2 and 2e1 rising stepwise toward the rear) of the lower foamed heat insulating protective material 10A. placed.

In the step of arranging the left and right vacuum heat insulating materials 11, as shown in FIG. 12C, the vacuum heat insulating materials 11B, 11B are inserted into the grooves 10k, 10k of the foam heat insulating protective material 10A on the lower side, and the grooves 18r (FIG. 11C) on the rear side are inserted. ) is a step of inserting the vacuum heat insulating material 11D. As a result, the vacuum heat insulating materials 11B and 11B are arranged outside the left plate 2c and the right plate 2d of the inner case 2, and the vacuum heat insulating material 11D is arranged outside the rear plate 2e.

As shown in FIG. 12D, the step of disposing the upper foam heat insulating protective material 10C is performed by placing the upper foam heat insulating protective material 10C on the upper plate 2a of the inner box 2 so that the grooves 10k, 10k, and 18p face downward. and inserting the upper ends 11a, 11a, 11p of the vacuum heat insulating materials 11B, 11B, 11D into the grooves 10k, 10k, 18k.

The step of arranging the outer box 3 is a step of assembling the outer box 3 so as to cover the left and right vacuum heat insulating materials 11B, 11B, 11D and the upper foam heat insulating protective material 10C assembled in the above process.
The outer box 3 is attached to the outer side of the inner box 2 through these steps.

In the present embodiment described above, the left and right vacuum heat insulating materials 11 and the rear vacuum heat insulating material 11 can be assembled by inserting them into the grooves 10k, 10k, and 18r, so that the productivity is excellent. Moreover, since the number of foamed heat insulating protective materials can be reduced, the manufacturability is excellent and the cost can be reduced.

Moreover, since the foam heat insulating protective material 10C and the vacuum heat insulating materials 11B, 11B, and 11C can be assembled before the outer box 3 is assembled, the productivity is excellent.

Further, since the boundaries between the vacuum heat insulating materials 11B, 11B, 11D and the grooves 10k, 10k, 18r are visible from the outside, the adhesive 16 can be applied while the inner box 2 is left standing. Therefore, the vacuum heat insulating materials 11B, 11B, and 11D can be assembled with simple work without complicated work, and the productivity is excellent.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.
Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

In the above embodiment, the rectangular parallelepiped refrigerator 1 has been described, but the present invention is not limited to this, and may be applied to refrigerator inner boxes of other shapes.

Further, in the above embodiment, each side of the inner box 2 is surrounded, but at least one side of the inner box 2 may be covered with the vacuum heat insulating material 11 via the foam heat insulating material 12 .

As a cooling means for the refrigerator 1, a device using a Peltier device, a Stirling refrigerator, or the like may be used.

Also, the thickness and size of the foam heat insulating protective material 10 and the like, and the thickness and size of the vacuum heat insulating material 11 and the like can be appropriately selected.

The refrigerator 1 also includes a delivery box equipped with a refrigerating function, a cold and dark facility in the house, and the like.

1 Refrigerator 2 Inner box 2a Upper plate 2b Lower plate 2c Left plate 2d Right plate 3 Outer box 10 Protective foam insulation 10A-10C Protective foam insulation 11 Vacuum insulation 11B Vacuum insulation 11D Vacuum insulation 12 Foam insulation 16 Adhesion agent 18 foam insulation 18f2 groove 18f1 groove 18g1 groove 18c foam insulation 18f foam insulation 18g foam insulation 18n groove 18p groove 18r groove 20a inside S1 space S1a gap S1b gap S2a gap S2b gap

Claims (8)

an inner box;
an outer box covering the inner box;
a space formed between the inner box and the outer box;
a foam heat insulating protective material disposed in the space and attached to the inner box,
The foam heat insulating protective material is
a plate-like vacuum insulation material;
and a foam insulation material that supports at least part of the vacuum insulation material,
The foam heat insulating protective material is attached to the inner box via the foam heat insulating material,
The foamed heat insulating material covers the end of the vacuum heat insulating material ,
The vacuum insulation material is opposed to each other with a gap formed between the inner box and the outer box,
A refrigerator, wherein a gap formed between the inner box and the outer box is smaller than a gap formed between the outer box and the refrigerator. 2. The refrigerator according to claim 1, wherein said foam heat insulating protective material is attached to said inner box via said foam heat insulating material while being spaced apart from said outer box. 2. The refrigerator according to claim 1, wherein said foamed heat insulating material entirely covers said vacuum heat insulating material. 2. The refrigerator according to claim 1 , wherein the vacuum heat insulating material faces the inner box with a gap formed therebetween. A plurality of the foam heat insulating protective materials are installed corresponding to the surface of the inner box,
In the adjacent foam heat insulating protective materials, the vacuum heat insulating material of one of the foam heat insulating protective materials is positioned on an extension of one side surface of the vacuum heat insulating material of the other foam heat insulating protective material. The refrigerator according to claim 1. The foam heat insulating protective material is attached to the upper plate, the lower plate, the left plate and the right plate of the inner box, respectively,
2. The foam heat insulating protective material attached to the left plate and the right plate covers right and left sides of the foam heat insulating protective material attached to the upper plate and the lower plate. refrigerator. 2. The refrigerator according to claim 1, wherein said foamed heat insulating material is formed with grooves in which ends of said vacuum heat insulating material are fitted. an inner box;
an outer box covering the inner box;
a space formed between the inner box and the outer box;
a foam heat insulating protective material disposed in the space and attached to the inner box,
The foam heat insulating protective material has a plate-shaped vacuum heat insulating material and a foam heat insulating material that supports at least a part of the vacuum heat insulating material,
The foam heat insulating protective material is attached to the inner box via the foam heat insulating material,
The foamed heat insulating material covers the end of the vacuum heat insulating material,
The vacuum insulation material faces the inner box and the outer box with a gap formed between them,
A method for manufacturing a refrigerator , wherein the gap formed between the inner box and the outer box is smaller than the gap formed between the refrigerator and the outer box,
Covering part or all of the vacuum insulation material with the foam insulation material,
a step of attaching the formed foamed heat insulating protective material to the inner box via the foamed heat insulating material;
and a step of covering the inner box to which the foamed heat insulating protective material is attached with the outer box.

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