JP2008121757A - Vacuum insulation material and refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum insulation material using a commercial laminate film to integrally form a heat insulating box body without requiring a large machining device and a machining space. <P>SOLUTION: The vacuum insulation material 100 comprises a core material 10, and a gas-barrier capsule material 20 arranged over both faces of the core material 10 to cover the core material 10. The core material 10 is shaped as the box body opened at one face and developed with its side face 12 extending around a bottom face 11. The capsule material 20 includes a first capsule material 20a and a second capsule material 20b arranged on one face of the core material 10, and a third capsule material 20c and a fourth capsule material 20d arranged on the other face of the core material. The end of the first capsule material 20a and the end of the second capsule material 20b are joined to each other with thermal deposition to form a first lug portion 22a, and the end of the third capsule material 20c and the end of the fourth capsule material 20d are joined to each other with thermal deposition to form a second lug portion 22b. The core material 10 covered with the capsule material 20 has a bent portion 13 formed by compression molding. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vacuum heat insulating material and a refrigerator using the same.

  Insulators having various structures and performances are used for boxes used for the purpose of heating and cooling various foods, such as refrigerators, cold storages, and heat storages, to maintain the temperature. In particular, the vacuum heat insulating material can realize a very good heat insulating property, and is used in many applications.

  The vacuum heat insulating material generally exhibits heat insulating performance by filling a core material into an outer packaging material and then sealing, depressurizing the inside of the outer packaging material, and maintaining a reduced pressure inside the outer packaging material.

  Conventionally, in a refrigerator, a vacuum insulating material using a laminate film obtained by laminating a resin film and a metal foil or a laminate film obtained by laminating a resin film and a film having a vapor deposition layer of a metal material or an inorganic material has been widely used. .

For example, JP 2001-336691 A (Patent Document 1) and JP 2003-293256 A (Patent Document 2) describe a vacuum heat insulating material that can be bent and processed.
JP 2001-336691 A JP 2003-293256 A

  However, when the outer packaging material of the vacuum heat insulating material is a metal or resin molded body, there is a problem that it is poor in versatility, for example, a molding die for the molded body is required every time the shape of the vacuum heat insulating material is changed in product model development. .

  Moreover, since the width | variety of the laminate film marketed now is 1600 mm or less, the large-sized vacuum heat insulating material including said vacuum heat insulating material is not produced. Therefore, in order to improve the heat insulation performance of the entire large device such as the refrigerator main body, it is necessary to attach a plurality of vacuum heat insulating materials to each surface of the refrigerator main body or the like. Since it is difficult to form a clean side at the outer peripheral portion of the vacuum heat insulating material, that is, the processing portion of the excess outer packaging material, if a plurality of vacuum heat insulating materials are attached in this way to form a heat insulating box, each vacuum heat insulating material Not a few gaps occur in adjacent parts of the material. Therefore, the amount of heat leakage at the boundary between adjacent vacuum heat insulating materials increases.

  Furthermore, the box body formed by bending the vacuum heat insulating material described in Japanese Patent Application Laid-Open No. 2001-336691 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2003-293256 (Patent Document 2) has two opening surfaces facing each other. In order to form a cylindrical body having only one surface as an opening surface, it is necessary to cover one of the two opening surfaces with another vacuum heat insulating material. Moreover, using the vacuum heat insulating materials described in JP 2001-336691 A (Patent Document 1) and JP 2003-293256 A (Patent Document 2), for example, the top surface, bottom surface, In order to cover both side surfaces, it is necessary to form a long vacuum heat insulating material, and in the bending process of such a long vacuum heat insulating material, the length of the rising surface of the vacuum heat insulating material by bending is long. In order to increase the length, the processing apparatus and the processing space must be enlarged.

  Therefore, an object of the present invention is to provide a large-sized vacuum heat insulating material capable of integrally forming a heat insulating box using a commercially available laminate film without requiring a large processing apparatus or processing space. That is.

  A vacuum heat insulating material according to the present invention includes a core material and a gas barrier outer packaging material that is disposed on both sides of the core material and covers the core material, and the core material is a developed view of a box body that is open on one side. As described above, the outer packaging material has a shape extending around the bottom surface around the bottom surface, and the outer packaging material includes a first outer packaging material and a second outer packaging material arranged on one surface of the core material, A third outer packaging material and a fourth outer packaging material disposed on the other surface, wherein the end of the first outer packaging material and the end of the second outer packaging material are joined by thermal welding to form the first outer packaging material. A joining surface is formed, and an end of the third outer packaging material and an end of the fourth outer packaging material are joined by thermal welding to form a second joining surface, and the core material covered with the outer packaging material Has a recess formed by compression molding.

  By doing in this way, a large-sized vacuum heat insulating material can be produced using a commercially available laminate film. By using a large-sized vacuum heat insulating material, a device such as a refrigerator excellent in heat insulating performance and energy saving can be provided. Moreover, since it can bend | folded by a recessed part, a heat insulation box can be formed with one vacuum heat insulating material.

  In addition, the core material has a shape in which the side surface extends around the bottom surface with the bottom surface as the center as a development view of the box with one surface open, so the length of the rising surface of the vacuum heat insulating material by bending is Can be shortened. For this reason, the large-sized vacuum heat insulating material which can form a heat insulation box integrally can be provided, without using a large sized processing apparatus and processing space using a commercially available laminate film.

  In the vacuum heat insulating material according to the present invention, each of the heat-welded first and second joining surfaces is folded along the surface of the outer packaging material and bonded to the surface of the outer packaging material, and the surface of the outer packaging material It is preferable that the first bonding surface bonded to the second bonding surface is disposed so as not to face the second bonding surface bonded to the surface of the outer packaging material.

  By doing in this way, the heat weldability of the edge | side including a heat welding part and the workability of a vacuum heat insulating material can be improved.

  In the vacuum heat insulating material according to the present invention, it is preferable that the outer packaging material is heat-sealed along the shape of the core material to form a bag.

  By doing in this way, the workability of a vacuum heat insulating material can be improved.

  In the vacuum heat insulating material according to the present invention, it is preferable that the outer packaging material is heat-sealed so as to have the shortest circumference around the core material.

  By doing in this way, the workability of a vacuum heat insulating material can be improved.

  A refrigerator according to the present invention includes any one of the above vacuum heat insulating materials formed in a box shape by being folded along a concave portion, and the heat-sealed portion of the outer packaging material includes a portion where no core material is present. In addition, it is preferable that a hole is formed in a part of the heat-welded portion of the outer packaging material in which no core material is present.

  By using the heat insulation box formed using any one of the above vacuum heat insulating materials for the refrigerator, the area covered by the vacuum heat insulating material having good heat insulating performance can be significantly improved as compared with the conventional case.

  By doing in this way, arrangement | positioning of a drain pipe or an electrical wiring is easy, and the refrigerator excellent in heat insulation performance and energy saving can be provided.

  The refrigerator according to the present invention includes an outer box and an inner box disposed inside the outer box, and has a space between the outer box and the inner box, and the space is folded along the recess. It is preferable that any one of the above-described vacuum heat insulating materials formed in a box shape is inserted and the space is filled with a foam heat insulating material.

  By using the heat insulation box formed using any one of the above vacuum heat insulating materials for the refrigerator, the area covered by the vacuum heat insulating material having good heat insulating performance can be significantly improved as compared with the conventional case.

  By doing in this way, the refrigerator excellent in heat insulation performance and energy saving can be provided.

  The refrigerator according to the present invention includes an outer box and an inner box disposed inside the outer box, and has a space between the outer box and the inner box, and the space is folded along the recess. It is preferable that any one of the above vacuum heat insulating materials formed in a box shape is provided, and the vacuum heat insulating material is covered with a foam heat insulating material.

  By using the heat insulation box formed using any one of the above vacuum heat insulating materials for the refrigerator, the area covered by the vacuum heat insulating material having good heat insulating performance can be significantly improved as compared with the conventional case.

  By doing in this way, the refrigerator excellent in heat insulation performance and energy saving can be provided.

  As described above, according to the present invention, a large-sized vacuum heat insulating material capable of integrally forming a heat insulating box body without using a large processing apparatus or a processing space using a commercially available laminate film. Can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing an entire vacuum heat insulating material as a first embodiment of the present invention.

  As shown in FIG. 1, the vacuum heat insulating material 100 includes a core material 10 and a gas barrier outer packaging material 20 that is disposed on both surfaces of the core material 10 and covers the core material 10. The core material 10 has a shape in which the side surface 12 extends around the bottom surface 11 with the bottom surface 11 as the center, as a development view of the box body with one surface opened. The outer packaging material 20 includes a first outer packaging material 20 a and a second outer packaging material 20 b arranged on one surface of the core material 10, a third outer packaging material arranged on the other surface of the core material 10, and a fourth. And outer packaging materials. The first sealing portion 22a as the first joining surface is formed by joining the end portion of the first outer packaging material 20a and the end portion of the second outer packaging material 20b by thermal welding, and is formed on the surface of the outer packaging material 20. Folded along, it is bonded to the surface of the outer packaging material 20. The second seal portion 22b as the second joining surface is formed by joining the end portion of the third outer packaging material and the end portion of the fourth outer packaging material by thermal welding so as to be along the surface of the outer packaging material 20. And is bonded to the surface of the outer packaging material 20. The seal portion 21 is formed by heat-sealing the outer packaging material 20 disposed on both surfaces of the core material 10 at a portion around the outer packaging material 20 where the core material 10 does not exist. The vacuum heat insulating material 100 is sealed under reduced pressure.

  The core material 10 is used alone or in combination with fiber materials such as inorganic fibers such as glass wool or organic fibers, or foam materials such as urethane foam. A bent portion 13 is formed as a concave portion on the side surface 12 of the core material 10. The bent portion 13 is formed by compression molding the vacuum heat insulating material 100 sealed under reduced pressure. The vacuum heat insulating material 100 can be bent at the bending portion 13 to produce a heat insulating box.

  The gas barrier film forming the outer packaging material 20 has a gas barrier layer, a heat-sealing layer for heat welding, a protective layer for preventing scratches, etc., and can keep the inside of the outer packaging material 20 in a reduced pressure state for a long period of time. It is a thing. The outer packaging material 20 may be formed by laminating a plurality of films having such characteristics. As a specific configuration example of the outer packaging material 20, an outermost layer is made of polyethylene terephthalate (PET) resin, an intermediate layer is made of an ethylene-vinyl alcohol copolymer resin having an aluminum vapor deposition layer, and an innermost layer is made of a high-density polyethylene resin. A gas barrier film is used. Another example of the structure of the outer packaging material 20 includes using nylon as the outermost layer, aluminum foil as the intermediate layer, and a gas barrier film made of high-density polyethylene resin as the innermost layer. As long as the above characteristics are obtained, the structure of the outer packaging material 20 is not particularly limited. However, by using a film that does not use aluminum foil as an upper surface and a lower surface that are the outermost layers of the outer packaging material, The influence of can be suppressed.

  As a manufacturing method of the vacuum heat insulating material 100, first, the outer packaging material 20 having the above-described configuration is manufactured, and two-side seal or three-side sealing is performed by thermal welding on two opposite sides of the outer packaging material 20 or three sides of the outer packaging material 20. The outer packaging material 20 is formed into a bag shape. Next, the core material 10 which forms the unfolded shape of the box prepared in advance is inserted into the bag-shaped outer packaging material 20. At this time, a two-side seal or a three-side seal may be applied in a state where the core material 10 is placed on the outer packaging material 20. Thus, the thing which covered the core material 10 with the outer packaging material 20 is arrange | positioned in a vacuum chamber, it decompresses, and the side which the outer packaging material 20 has opened is sealed by heat welding, and the vacuum heat insulating material 100 is produced. .

  In order to maintain the initial heat insulation performance and the temporal heat insulation performance of the vacuum heat insulating material 100, it is preferable to arrange a getter agent such as a gas adsorbent or a moisture adsorbent in the vacuum heat insulating material 100.

  The manufacturing method of the vacuum heat insulating material 100 is not particularly limited to the above-described method. Any method can be used.

  FIG. 2 shows, as one embodiment of the present invention, a cross-sectional view (A) of the vacuum heat insulating material of FIG. 1 viewed from the direction of the II-II line, and FIG. It is sectional drawing (B) seen from the direction of II-II line. The bent portion is not shown.

  As shown in FIG. 2A, the seal portion 22a is formed by joining the end portion of the first outer packaging material 20a and the end portion of the second outer packaging material 20b by heat welding. Is folded in the direction of the arrow in the figure so as to adhere to the surface of the outer packaging material 20. The seal portion 22b is formed by joining the end portion of the third outer packaging material 20c and the end portion of the fourth outer packaging material 20d by thermal welding. It is folded in the direction and adhered to the surface of the outer packaging material 20. In a portion around the outer packaging material 20 where the core material 10 does not exist, the outer packaging material 20 disposed on both surfaces of the core material 10 is thermally welded to form a seal portion 21.

  As shown in FIG. 2B, the outer packaging material of the vacuum heat insulating material 100 may be arranged differently from the arrangement shown in FIG. 1, and the end portion of the outer packaging material 20e and the second outer packaging material are used as the first outer packaging material. As the outer packaging material, the end portion of the outer packaging material 20f is heat-welded to form the first sealing portion 22c as the first joint surface, and the end portion of the outer packaging material 20g and the second sealing material as the first outer packaging material As the outer packaging material, the end portion of the outer packaging material 20f is thermally welded to form the first sealing portion 22d as the first joint surface, and as the third outer packaging material, the end portion of the outer packaging material 20e and the fourth outer packaging material are used. The end portion of the outer packaging material 20g is thermally welded to form the second seal portion 22e as the second joint surface. The seal portion 22c, the seal portion 22d, and the seal portion 22e are each folded in the direction of the arrow in the figure and bonded to the surface of the outer packaging material 20.

  Thus, the number of gas barrier films as the outer packaging material is changed according to the size of the vacuum heat insulating material to be produced, and is not limited to the above example.

  All of the seal portions (22a to 22e) are folded along the surface of the outer packaging material 20, and are bonded and fixed to the surface of the outer packaging material 20 with a tape or an adhesive.

  As described above, the vacuum heat insulating material 100 includes the core material 10 and the gas barrier outer packaging material 20 that is disposed on both surfaces of the core material 10 and covers the core material 10, and the core material 10 is open on one side. As a developed view of the box body, the outer packaging material 20 has a shape in which the side surface 12 extends around the bottom surface 11 around the bottom surface 11, and the outer packaging material 20 is a first outer packaging material disposed on one surface of the core material 10. 20a, the second outer packaging material 20b, the third outer packaging material 20c and the fourth outer packaging material 20d arranged on the other surface of the core material 10, and the end portion of the first outer packaging material 20a and the second outer packaging material 20d. The end portion of the outer packaging material 20b is joined by thermal welding to form a first seal portion 22a, and the end portion of the third outer packaging material 20c and the end portion of the fourth outer packaging material 20d are joined by thermal welding. The core material 10 which is joined to form the second seal portion 22b and is covered with the outer packaging material 20 is compression-molded. Therefore bent portion 13 is formed.

  By doing in this way, the large-sized vacuum heat insulating material 100 can be produced using a commercially available laminate film. By using the large-sized vacuum heat insulating material 100, a device such as a refrigerator excellent in heat insulating performance and energy saving can be provided. Moreover, since it can be bend | folded in the bending part 13, the heat insulation box can be formed with the single vacuum heat insulating material 100. FIG.

    Moreover, since the core material 10 has a shape in which the side surface 12 extends around the bottom surface 11 around the bottom surface 11 as a developed view of the box having one surface open, the vacuum heat insulating material 100 is started up by bending. The length of the surface can be shortened. For this reason, the large-sized vacuum heat insulating material 100 which can form a heat insulation box integrally can be provided using a commercially available laminated film, without requiring a large sized processing apparatus and processing space.

  FIG. 3 is a cross-sectional view of the vacuum heat insulating material shown in FIG. 1 as viewed from the direction of the III-III line as one embodiment of the present invention.

  As shown in FIG. 3, the first seal portion 22a and the second seal portion 22b that are folded along the surface of the outer packaging material 20 and bonded to the surface of the outer packaging material 20 are arranged so as not to face each other. Has been. At this time, a gap 23 is formed between the outer packaging material and the outer packaging material.

  FIG. 4 is a cross-sectional view seen from the direction of the line III-III in FIG. 1 when the first seal part and the second seal part are arranged to face each other.

  As shown in FIG. 4, when the first sealing portion 22a and the second sealing portion 22b are arranged on the outer packaging material 20 so as to face each other, the gap 23 becomes large. Problems arise in heat weldability and reliability of the machine. Moreover, since the gas barrier film is partially thick at the portion where the seal portions are opposed to each other, the rigidity of the vacuum heat insulating material is increased and the flexibility is deteriorated at that portion. For this reason, the workability of the vacuum heat insulating material is deteriorated in the formation of a uniform recess by compression molding, which will be described later, the folding process for producing the box and the folding process of the surplus portion of the outer packaging material.

  Therefore, in the vacuum heat insulating material 100, each of the heat-sealed first seal portion 22a and second seal portion 22b is folded along the surface of the outer packaging material 20 and bonded to the surface of the outer packaging material 20. The first seal portion 22 a bonded to the surface of the outer packaging material 20 is preferably disposed so as not to face the second seal portion 22 b bonded to the surface of the outer packaging material 20.

  By doing in this way, the heat weldability of the edge | side including a heat welding part and the workability of the vacuum heat insulating material 100 can be improved.

  FIG. 5 and FIG. 6 are diagrams showing vacuum heat insulating materials having different seal portions.

  As shown in FIG. 5, in the vacuum heat insulating material 101, the seal portion 22 a and the seal portion 22 b are arranged so as not to overlap the bent portion 13 of the core material 10. By doing in this way, when manufacturing the heat insulation box body by bending the vacuum heat insulating material 101 in the bending part 13, it is easy to process.

  As shown in FIG. 6, in the vacuum heat insulating material 102, a plurality of first seal portions 22 a and a plurality of second seal portions 22 b are formed in the short side direction of the core material 10. Also in this case, it is preferable that the sealing portion 22a and the sealing portion 22b are arranged so as not to overlap the bent portion 13 of the core material 10. By doing in this way, a large-sized vacuum heat insulating material can be produced even if it uses a commercial laminate film with a short width.

  FIG. 7 is a view showing a cross section of the vacuum heat insulating material in which the bent portion is formed. The seal part is not shown.

  As shown in FIG. 7A, the bent portion 13 may be formed only on one surface of the vacuum heat insulating material 100, and is formed on both surfaces of the vacuum heat insulating material 100 as shown in FIG. Also good. Moreover, as shown in FIG.7 (C), the one bending part 13 may be formed in one surface of the vacuum heat insulating material 100 by several recessed part.

  Since the number and shape of the bent portions 13 are optimized depending on the material and thickness of the core material 10, it is not necessary to form the bent portions 13 depending on the core material 10 to be used. For example, when glass wool having a thickness of 12 mm is used as the core material 10, it is desirable to form three bent portions 13 on both sides of the core material 10, while the core material 10 is made of polyester fiber having a thickness of 3 mm. In this case, it is not necessary to form the bent portion 13.

  FIG. 8 to FIG. 10 show each stage of a method for manufacturing a heat insulating box using a vacuum heat insulating material according to the present invention as another embodiment of the present invention.

  FIG. 8 is a diagram showing a first step of manufacturing a heat insulating box as another embodiment of the present invention.

  As shown in FIG. 8, in the outer packaging material 20 of the vacuum heat insulating material 100, the seal portion 21 a is formed so as to connect the apex of the core material 10 so that the portion to be thermally welded around the core material 10 is the shortest. Form. After the sealing portion 21a is heat-welded and the outer packaging material 20 is made, the vacuum heat insulating material 100 is cut along the two-dot chain line in the drawing, and the outer packaging material 20 where the core material 10 does not exist is cut off.

  Thus, in the vacuum heat insulating material 100, the outer packaging material 20 is heat-welded so as to have the shortest circumferential length around the core material 10, thereby forming the bag. Can be improved.

  Alternatively, the seal portion 21a may be formed in parallel with each side of the core material 10, and the outer packaging material 20 may be cut off in parallel along the seal portion 21a.

  As described above, in the vacuum heat insulating material 100, the outer packaging material 20 is heat-welded along the shape of the core material 10 to form a bag, thereby improving the workability of the vacuum heat insulating material 100.

  FIG. 9 is a diagram showing a second step of manufacturing a heat insulating box as another embodiment of the present invention.

  As shown in FIG. 9, in the vacuum heat insulating material 100, the outer packaging material 20 has an ear portion 24 that is a portion where the core material 10 does not exist. The ear portion 24 is folded along the surface of the outer packaging material 20 along the two-dot chain line shown in the figure, and fixed on the outer packaging material 20 with a tape or an adhesive.

  FIG. 10 is a diagram showing a third step of manufacturing a heat insulating box as another embodiment of the present invention. 10 (A) to 10 (C) schematically show a method of treating the ears in the vacuum heat insulating material. FIG. 10C shows a view of the vacuum heat insulating material of FIG. 10A viewed from the lower right direction of FIG. FIG. 10B shows only the outer packaging material.

  As shown in FIGS. 10A and 10B, after the vacuum heat insulating material 100 is bent into a predetermined box shape along the bent portion 13, two overlapping ear portions 24 are shown in the figure. Fold along the oblique line in the direction of the arrow and fix on the outer packaging material 20 with an adhesive or the like.

  Next, as shown in FIG. 10C, the ear portion 24 is folded along the shape of the core material 10 and fixed on the outer packaging material 20 with an adhesive or the like. Thus, all the ear | edge parts 24 are fixed to the part in which the core material 10 exists. The processing method of the ear | edge part 24 is not specifically limited, The other method may be sufficient as long as all the ear | edge parts 24 are fixed to the part in which the core material 10 exists on the outer packaging material 20. FIG.

  Thus, the heat insulation box using the vacuum heat insulating material of this invention is produced.

  FIG. 11 is a diagram schematically showing how to assemble a heat insulating box using the vacuum heat insulating material of the present invention. The outer packaging material is not shown. The arrangement of the outer packaging material and the seal portion of this vacuum heat insulating material is the same as that of the vacuum heat insulating material shown in FIG.

  As shown in FIG. 11A, the vacuum heat insulating material 100 has a shape in which the side surface 12 extends around the bottom surface 11 with the bottom surface 11 as the center, as a development view of the box having one surface open. A bent portion 13 is formed at the boundary between the side surface 12 and the bottom surface 11 by compression molding. As shown in FIG. 11 (B), the heat insulating box 200 having one surface opened by the vacuum heat insulating material 100 can be created by bending the side surface 12 around the bottom surface 11 along the bent portion 13. it can. At the time of processing, the height at which the vacuum heat insulating material 100 is raised becomes a height h1, which is equal to the height of the heat insulating box 200 to be manufactured.

  FIG. 12 is a diagram schematically showing how to assemble a heat insulating box using a conventional vacuum heat insulating material.

  As shown in FIG. 12 (A), the vacuum heat insulating material 110 has a shape in which the surfaces 12a, 12b, 12c, and 12d are arranged in a line as a developed view of a box body in which two opposing surfaces are open. Have

  As shown in FIG. 12B, with the surface 12b as the bottom surface, the surface 12a is folded and raised at the bent portion 13a, and the surface 12c is folded and raised at the bent portion 13b. At this time, the surface 12d is raised together with the surface 12c. Finally, as shown in FIG. 12C, the heat insulating box 210 is manufactured by folding the surface 12d at the bent portion 13c.

  When a heat insulation box is formed using the conventional vacuum heat insulating material 110, the height at which the vacuum heat insulating material 110 is raised during processing is the height h2. The height h2 is higher than the height h1 of the heat insulating box 210 finally produced. On the other hand, when forming a heat insulation box using the vacuum heat insulating material 100 of this invention, the height which raises the vacuum heat insulating material 100 in the process becomes height h1. Therefore, when manufacturing the heat insulation box 200 using the vacuum heat insulating material 100 of this invention, compared with the case where the heat insulation box 210 is produced using the conventional vacuum heat insulating material 110, a large-sized processing apparatus and processing space are required. do not need.

  Thus, the vacuum heat insulating material 100 includes the core material 10 and the gas barrier outer packaging material 20 that is disposed on both surfaces of the core material 10 and covers the core material 10, and the core material 10 is open on one side. As a developed view of the box, the side surface 12 extends around the bottom surface 11 around the bottom surface 11, and the outer packaging material 20 is a first outer packaging material 20 a disposed on one surface of the core material 10. And the second outer packaging material 20b, the third outer packaging material 20c and the fourth outer packaging material 20d disposed on the other surface of the core material 10, and the end portion of the first outer packaging material 20a and the second outer packaging material 20d. The end portion of the outer packaging material 20b is joined by thermal welding to form the first seal portion 22a, and the end portion of the third outer packaging material 20c and the end portion of the fourth outer packaging material 20d are joined by thermal welding. Thus, the second seal portion 22b is formed, and the core material 10 covered with the outer packaging material 20 is subjected to compression molding. Bent portion 13 is formed me.

  By doing in this way, since the large-sized vacuum heat insulating material 100 can be produced using a commercially available laminate film, and it can be bent at the folding part 13, the heat insulating box is formed with a single vacuum heat insulating material 100. A body 200 can be formed.

  By doing in this way, the large-sized vacuum heat insulating material 100 which can form the heat insulation box 200 integrally using a commercially available laminate film, without requiring a large sized processing apparatus and processing space is provided. can do.

  FIG. 13 is a plan view showing the entire vacuum heat insulating material as still another embodiment of the present invention.

  As shown in FIG. 13, the vacuum heat insulating material 103 is different from the vacuum heat insulating material 100 shown in FIG. 1 in that a hole 25 is formed as a portion where the core material does not exist in a predetermined portion of the core material 10. Other configurations of the vacuum heat insulating material 103 are the same as those of the vacuum heat insulating material 100.

  FIG. 14 is a view showing the periphery of a hole formed in the core material of the vacuum heat insulating material.

  As shown in FIG. 14A, when the vacuum heat insulating material 103 is decompressed, the outer packaging materials 20 disposed on the upper surface and the lower surface of the core material 10 are in close contact with each other in the hole 25. Thus, with the outer packaging material 20 in close contact with the hole 25, the outer packaging material 20 covering the hole 25 is thermally welded, and the outer packaging material 20 is cut out along the two-dot chain line in the figure. By doing in this way, as shown in FIG.14 (B), the through-hole 26 is formed as a hole formed in the heat welding part of the outer packaging material 20 in which the core material 10 does not exist. The size and shape of the through hole 26 are determined according to the purpose and are not particularly limited.

  FIG. 15 is a diagram schematically showing a cross section of a refrigerator provided with the vacuum heat insulating material shown in FIG. 13 as still another embodiment of the present invention.

  As shown in FIG. 15, in the refrigerator 300, an interior space 301 is formed by the main body 310, the front door 320, and the partition wall 330. The main body 310 includes an outer 312 as an outer box and an inner box 311 disposed inside the outer box 312, and has a space between the outer box 312 and the inner box 311. A space between the outer box 312 and the inner box 311 is provided with a heat insulating box 203 produced by folding the vacuum heat insulating material 103 along the bent portion. The heat insulation box 203 is arranged at the approximate center of the space formed by the inner 311 and the outer 312 with spacer materials (not shown) or the like disposed on both sides of the heat insulation box 203. Electrical wiring (not shown) and a drain pipe 340 are attached through the through-hole 26 of the heat insulation box 203, and a foam material such as urethane foam is injected into both sides of the heat insulation box 203, and between the inner 311 and the outer 312. The space is filled.

  As described above, the refrigerator 300 includes the vacuum heat insulating material 103 formed in a box shape by being folded along the bent portion 13, and the portion thermally bonded in the outer packaging material 20 is a portion 25 where the core material 10 does not exist. A through hole 26 is formed in a part of the heat-welded portion of the outer packaging material 20 that does not include the core material 10.

  The refrigerator 300 includes an outer 312 and an inner 311 disposed inside the outer 312. The refrigerator 300 has a space between the outer 312 and the inner 311. The refrigerator 300 is folded along the bent portion 13. The vacuum heat insulating material 103 formed in a box shape is inserted, and the space is filled with the foam heat insulating material 400.

  By using the heat insulating box 203 formed by using the vacuum heat insulating material 103 for the refrigerator 300, the area covered by the vacuum heat insulating material 103 with good heat insulating performance can be significantly improved as compared with the conventional case.

  By doing in this way, the arrangement | positioning of the drain pipe 340 and an electrical wiring is easy, and the refrigerator 300 excellent in heat insulation performance and energy saving can be provided.

  The refrigerator 300 includes an outer 312 and an inner 311 disposed inside the outer 312. The refrigerator 300 has a space between the outer 312 and the inner 311, and is folded along the bent portion 13 in the space. A vacuum heat insulating material 103 formed in a box shape is provided, and the vacuum heat insulating material 103 may be covered with a foam heat insulating material 400.

  By doing in this way, the area which a vacuum heat insulating material with favorable heat insulation performance covers can be improved significantly conventionally, and the refrigerator excellent in heat insulation performance and energy saving can be provided.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

It is a top view which shows the whole vacuum heat insulating material as 1st embodiment of this invention. As one embodiment of the present invention, a cross-sectional view (A) of the vacuum heat insulating material of FIG. 1 viewed from the direction of the line II-II, and a line II-II of FIG. It is sectional drawing (B) seen from this direction. As one embodiment of this invention, it is sectional drawing which looked at the vacuum heat insulating material shown in FIG. 1 from the direction of the III-III line. It is sectional drawing seen from the direction of the III-III line | wire of FIG. 1 when arrange | positioning so that a 1st seal | sticker part and a 2nd seal | sticker part may oppose. It is a figure which shows the vacuum heat insulating material from which arrangement | positioning of a seal part differs. It is a figure which shows the vacuum heat insulating material from which arrangement | positioning of a seal part differs. It is a figure which shows the cross section of the vacuum heat insulating material in which the bending part was formed. It is a figure which shows the 1st process of preparation of a heat insulation box as another embodiment of this invention. It is a figure which shows the 2nd process of preparation of a heat insulation box as another embodiment of this invention. It is a figure which shows the 3rd process of preparation of a heat insulation box as another embodiment of this invention. It is a figure which shows roughly how to assemble the heat insulation box using the vacuum heat insulating material of this invention. It is a figure which shows roughly how to assemble the heat insulation box using the conventional vacuum heat insulating material. As yet another embodiment of the present invention, it is a plan view showing the entire vacuum heat insulating material. It is a figure which shows the circumference | surroundings of the hole formed in the core material of a vacuum heat insulating material. As another embodiment of this invention, it is a figure which shows schematically the cross section of a refrigerator provided with the vacuum heat insulating material shown in FIG.

Explanation of symbols

  10: core material, 11: bottom surface, 12: side surface, 13: bent portion, 20: outer packaging material, 20a: first outer packaging material, 20b: second outer packaging material, 20c: third outer packaging material, 20d: first Four outer packaging materials, 21, 22a, 22b: seal part, 24: through hole, 30-34: recess, 100-103: vacuum heat insulating material, 200: heat insulating box, 300: refrigerator, 311: inner box, 312: Outer box, 400: foam material.

Claims (7)

A core material,
A gas barrier outer packaging material disposed on both sides of the core material and covering the core material;
The core material has a shape in which a side surface extends around the bottom surface with the bottom surface as a center, as a development view of a box having one surface opened,
The outer packaging material includes a first outer packaging material and a second outer packaging material arranged on one side of the core material, a third outer packaging material and a fourth outer packaging arranged on the other surface of the core material. Including materials,
The end of the first outer packaging material and the end of the second outer packaging material are joined by heat welding to form a first joining surface, and the end of the third outer packaging material and the fourth outer packaging material The end of the outer packaging material is joined by thermal welding to form a second joining surface,
A vacuum heat insulating material, wherein the core material covered with the outer packaging material has a recess formed by compression molding. Each of the first and second joining surfaces heat-welded is folded along the surface of the outer packaging material and bonded to the surface of the outer packaging material,
2. The vacuum heat insulation according to claim 1, wherein the first bonding surface bonded to the surface of the outer packaging material is disposed so as not to face the second bonding surface bonded to the surface of the outer packaging material. Wood.   The said outer packaging material is a vacuum heat insulating material of Claim 1 or Claim 2 heat-welded along the shape of the said core material, and is bag-made.   3. The vacuum heat insulating material according to claim 1, wherein the outer packaging material is heat-welded so as to have a shortest circumference around the core material.   5. The vacuum heat insulating material according to claim 1, wherein the core material is provided with the vacuum heat insulating material according to claim 1, which is folded along the concave portion and formed in a box shape. A refrigerator including a portion where no core exists and a hole is formed in a part of the heat-welded portion of the outer packaging material where the core material does not exist.   An outer box and an inner box disposed inside the outer box, and has a space between the outer box and the inner box, and the box is folded along the recess in the box The refrigerator with which the vacuum heat insulating material of any one of Claim 1- Claim 4 formed in the shape is inserted, and the foaming heat insulating material is filled in the said space. An outer box and an inner box disposed inside the outer box, and has a space between the outer box and the inner box, and the box is folded along the recess in the box The refrigerator provided with the vacuum heat insulating material of any one of Claim 1- Claim 4 formed in the shape, and the said vacuum heat insulating material is covered with the foam heat insulating material.

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