JP2006118634A - Vacuum heat insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material with less limit in the shape of a three-dimensional structure, an application pbject, and having wide applications. <P>SOLUTION: This vacuum heat insulating material 8 is formed by disposing the cores 9a and 9b to form the development of the three dimensional structure. In a film 10, the entire surface of the portion thereof not including the cores 9a and 9b in the film 10 is thermally fused and the vacuum heat insulating material 8 is bent through a fold line 11 positioned between the cores 9a and 9b to form the three dimensional structure. Also, since the fin part of the end part of the vacuum heat insulating material can be shortened and the areas of the surface of the vacuum heat insulating material occupied by the cores 9a and 9b can be increased relatively, the effective heat insulating area on the surface of the vacuum heat insulating material can be increased. Accordingly, the effective heat insulating area can be taken effectively even in the vacuum heat insulating material of various shapes, and the vacuum heat insulating material with high heat insulating effect can be provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum heat insulating material that forms a three-dimensional structure.

Conventionally, as this type of vacuum heat insulating material, as shown in FIG. 11, three rectangular core materials 1 are covered with a gas barrier film 2, and the inside of the film 2 is decompressed. The film 2 is disposed between the adjacent cores 1 so that each of the three cores 1 is located in an independent space, being arranged on substantially the same plane at a predetermined distance from each other in one direction. Is heat-welded, and there is a vacuum heat insulating material 5 that can be bent at a folding line 4 provided on a heat-welded portion 3 positioned between adjacent core materials 1 (see, for example, Patent Document 1).
As shown in FIG. 12, this vacuum heat insulating material 5 is provided inside the outer box 6 of a heat insulating box such as a refrigerator. The outer box 6 is formed by bending a metal plate 7 into a U-shape. 12 is shown in FIG. 12 by bending the metal plate 7 with the vacuum heat insulating material 5 bonded and fixed to the inner surface of the outer box 6 in a U-shape. An outer box 6 having a vacuum heat insulating material 5 on the inner surface is produced.
Japanese Patent Laid-Open No. 7-98090

  However, in the above-described conventional configuration, the plurality of rectangular core members 1 are arranged on substantially the same plane at a predetermined distance from each other in one direction, and the heat welding portion 3 located between the adjacent core members 1 is arranged. Since each folding line 4 to be formed is substantially parallel to each other, the object to which the conventional vacuum heat insulating material 5 can be applied is limited to only the side surface of the three-dimensional structure whose side surface shape is rectangular.

  Furthermore, in the film part which is not heat-welded, since the part which does not contain the core material 1 exists between the films 2, the effective heat insulation area is reduced correspondingly.

  It is an object of the present invention to provide a vacuum heat insulating material that has few restrictions on the shape of a three-dimensional structure to be applied, and has a large effective heat insulating area and a high heat insulating effect.

  In order to achieve the above object, the vacuum heat insulating material of the present invention is arranged such that a plurality of core materials form a development view of a three-dimensional structure, and the entire surface of the portion not including the core material is thermally welded between the films. Is.

  As a result, the plurality of core members are arranged so that folding lines in one or more directions (for example, two directions in the vertical direction and the horizontal direction) can be formed in the portion located between the core members. It can be bent in more than one direction. Therefore, vacuum heat insulating materials that form various three-dimensional structures can be produced.

  In addition, since there is no portion that is not thermally welded in the portion not including the core material between the films, the fin portion at the end of the vacuum heat insulating material can be shortened, and the area occupied by the core material on the surface of the vacuum heat insulating material is relatively large. Therefore, it is possible to increase the effective heat insulation area on the surface of the vacuum heat insulating material.

  The vacuum heat insulating material of the present invention can be applied to various three-dimensional structures. Moreover, even in the vacuum heat insulating materials having various shapes, an effective heat insulating area can be effectively obtained, and a vacuum heat insulating material having a high heat insulating effect can be obtained.

  According to a first aspect of the present invention, a plurality of core materials are covered with a gas barrier film, and a vacuum heat insulating material obtained by reducing the pressure inside the film forms a three-dimensional structure of the core materials. The vacuum insulating material is characterized in that, in the film, the whole surface of a portion not including the plurality of core materials between the films is heat-welded, and is bent at a folding line located between the core materials. Thereby, the vacuum heat insulating material which formed the three-dimensional structure can be produced.

  In addition, in the film, since there is no portion that is not thermally welded in the portion that does not include the core material between the films, the fin portion at the end of the vacuum heat insulating material can be shortened, and the area occupied by the core material on the surface of the vacuum heat insulating material is relatively Therefore, the effective heat insulation area on the surface of the vacuum heat insulating material can be increased. Therefore, even in the vacuum heat insulating materials having various shapes, an effective heat insulating area can be effectively obtained, and a vacuum heat insulating material having a high heat insulating effect can be obtained.

  In addition, since a plurality of core materials are located in independent spaces, even if the vacuum level of a space containing a specific core material is reduced, the vacuum of the space containing other core materials is reduced. It is possible to minimize the deterioration of the heat insulation performance without lowering the temperature.

  Invention of Claim 2 is the vacuum heat insulating material characterized by the space | interval between each core material being below the thickness of a core material in the invention of Claim 1, Comprising: Between core materials with respect to core material thickness Since the interval is relatively shortened, the effective heat insulation area can be increased. In addition, although the space | interval between core materials is made below into the thickness of a core material, when using by bending, it cannot be overemphasized that there exists an appropriate space | interval.

  The invention according to claim 3 is the vacuum heat insulating material according to claim 1 or 2, wherein the core material is a polygon formed by three or more line segments. Yes, folding lines positioned between the core materials can be formed in multiple directions, and vacuum heat insulating materials that form various three-dimensional structures can be produced.

  Invention of Claim 4 is a vacuum heat insulating material characterized by the core material of a different shape coexisting in the invention of any one of Claim 1 to Claim 3, and various shapes. Combinations of core materials are possible, folding lines positioned between the core materials can be freely designed, and a vacuum heat insulating material that forms a desired three-dimensional structure can be produced.

  Invention of Claim 5 is a vacuum heat insulating material characterized by the core material of different thickness coexisting in the invention as described in any one of Claims 1-4, The vacuum in this invention When applying a heat insulating material to a three-dimensional structure, if the heat insulating effect required by the part of the three-dimensional structure and the space for applying the vacuum heat insulating material are different from other parts, the core material corresponding to the corresponding part is different from the other parts. Different thicknesses are possible.

  For example, in a part where a three-dimensional structure to which a vacuum heat insulating material is applied is required to have a larger heat insulating effect than other parts, the thickness of the core material corresponding to that part can be increased.

  Moreover, in the site | part with a three-dimensional structure which applies a vacuum heat insulating material, when the application space of a vacuum heat insulating material is smaller than another site | part, the thickness of the core material corresponding to the site | part can be made small.

  The invention according to claim 6 is a vacuum heat insulating material characterized in that in the invention according to any one of claims 1 to 5, a core material composed of different materials coexists. In the case where the vacuum heat insulating material in the invention is applied to a three-dimensional structure, the heat insulating effect required by the part of the three-dimensional structure, the application space of the vacuum heat insulating material, and the atmospheric temperature are different from other parts, corresponding to the corresponding part The core material to be made can be a core material made of a material different from other parts.

  For example, in a part of a three-dimensional structure to which a vacuum heat insulating material is applied, if a larger heat insulating effect is required than other parts, the core material corresponding to that part should be made of a material having excellent heat insulating performance. Can do.

  Moreover, in the site | part with a three-dimensional structure which applies a vacuum heat insulating material, when the application space of a vacuum heat insulating material is smaller than another site | part, the core material corresponding to the site | part is comprised from the material with the outstanding heat insulation performance. This makes it easy to obtain a predetermined heat insulating effect even if the thickness of the core material is reduced.

  Furthermore, when the atmospheric temperature is different from other parts in a part of the three-dimensional structure to which the vacuum heat insulating material is applied, the core material corresponding to the part is made of a material having excellent heat insulation performance and reliability over time in the temperature range. Can be configured.

  The invention according to claim 7 is the same material as the heat welding layer of the film having a core-shaped hole between the two films in the invention according to any one of claims 1 to 6. A vacuum heat insulating material characterized in that a sheet member is provided, and in the vacuum evacuation process at the time of manufacturing the vacuum heat insulating material in the present invention, the core material is disposed on the hole of the sheet member, and the core material is placed at a predetermined position. It becomes possible to fix to.

  Further, since the sheet member is made of the same material as the heat welding layer of the film, the sheet member and the film can be easily welded at the time of heat welding.

  The invention according to claim 8 is a vacuum heat insulating material characterized in that a three-dimensional structure is formed based on the development in the invention according to any one of claims 1 to 7, Since the vacuum heat insulating material in the invention can form various three-dimensional structures, it can be applied to various three-dimensional structures.

  The invention according to claim 9 is the vacuum heat insulating material according to the invention according to claim 8, characterized in that a three-dimensional structure is formed by sticking a tape to an end, and the three-dimensional structure of the vacuum heat insulating material is strong. And can be held for a long time.

  Invention of Claim 10 is a vacuum heat insulating material characterized by using a flame-retardant tape as a tape in the invention of Claim 9, and uses the vacuum heat insulating material in the present invention in a high temperature environment. Easy to do.

  Moreover, although the heat welding material which is easy to burn is exposed to the end surface of a vacuum heat insulating material, since the end surface is covered with a flame retardant tape, the flame retardant level of a vacuum heat insulating material can be improved.

  The invention according to claim 11 is the vacuum heat insulating material according to the invention according to claim 8, wherein the three-dimensional structure is formed by fixing the end portion with a sealant, and the three-dimensional structure of the vacuum heat insulating material. Can be held powerfully and for a long time.

  Moreover, the sealing agent is flexible and can form a three-dimensional structure efficiently and effectively regardless of the shape of the vacuum heat insulating material.

  The invention according to claim 12 is the vacuum heat insulating material according to claim 11, wherein a flame retardant sealing agent is used as the sealing agent, and the vacuum heat insulating material according to the present invention is a high temperature environment. Easy to use below.

  Moreover, although the heat welding material which is easy to burn is exposed to the end surface of a vacuum heat insulating material, since the end surface is covered with a flame retardant sealant, the flame retardant level of the vacuum heat insulating material can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
1 is a plan view of a vacuum heat insulating material according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the vacuum heat insulating material according to the same embodiment in the manufacturing process, and FIG. 3 is a cross-sectional view taken along line AA in FIG. 4 is a plan view of the sheet member of the vacuum heat insulating material in Embodiment 1, and FIG. 5 is a three-dimensional view of the vacuum heat insulating material of the same embodiment.

  In FIG. 1, the vacuum heat insulating material 8 arrange | positions core material 9a, 9b so that the development view of a hexahedron may be formed, and the space | interval between each core material 9a, 9b is 5 mm. The core material 9a corresponding to the bottom surface of the hexahedron has a thickness of 5 mm and is made of a material mainly composed of glass wool, and the core material 9b corresponding to the side surface of the hexahedron is made of a material mainly composed of silica powder and having a thickness of 5 mm. ing.

  As the film 10, a film having at least a gas barrier layer and a heat welding layer can be used, and the film 10 in this embodiment is composed of aluminum as a gas barrier layer and a polypropylene film as a heat welding layer. Note that there is a folding line 11 for forming a three-dimensional structure between the core members 9a and 9b.

  A vacuum heat insulating material 8 shown in FIG. 1 is obtained by cutting the vacuum heat insulating material 8 shown in FIG. The vacuum heat insulating material 8 is formed by covering the core materials 9a and 9b with a gas barrier film 10, reducing the pressure inside the film 10, and thermally welding the film 10 when a predetermined degree of vacuum is reached.

  The thermal welding is performed by heating the entire surface of the film 10 from above and below with a planar silicon rubber heater, and the film 10 is thermally welded at all locations where the core materials 9a and 9b do not exist.

  As shown in FIG. 3, the vacuum heat insulating material 8 is provided with a sheet member 13 made of a polypropylene film made of the same material as the heat welding layer of the film 10 between the two films 10. As shown in FIG. 4, the sheet member 13 is provided with holes 14 having the same shape as the core materials 9 a and 9 b, and the core materials 9 a and 9 b are fitted into the holes 14.

  A vacuum heat insulating material 8 shown in FIG. 5 is formed by bending the vacuum heat insulating material 8 shown in FIG. 1 along a fold line 11, and a tape 15 made of a flame-retardant acrylic material is attached to the end face.

  As described above, in the present embodiment, the core materials 9a and 9b are arranged so as to form a development view of a hexahedron, and the film 10 is thermally welded at all the portions where the core materials 9a and 9b do not exist. A three-dimensional structure can be formed by folding the vacuum heat insulating material 8 at the folding line 11 located between the core materials 9a and 9b, and the area other than the core material on the surface of the vacuum heat insulating material is reduced. It is possible to increase the effective heat insulation area.

  Furthermore, since the plurality of core materials 9a and 9b are located in independent spaces, even if the vacuum degree of the space containing the specific core material is lowered, other core materials are included. It is possible to minimize the deterioration of the heat insulation performance without lowering the vacuum degree of the space.

  Further, since the core materials 9a and 9b are both 5 mm thick and the distance between the core materials 9a and 9b is 5 mm, the distance between the core materials 9a and 9b with respect to the thickness of the core materials 9a and 9b is relatively shortened. Therefore, the effective heat insulation area can be increased. Furthermore, since the space | interval between core material 9a, 9b is equivalent to the thickness of core material 9a, 9b, it can also be bent.

  Moreover, the main component of the core material 9a is glass wool, the main component of the core material 9b is silica powder, and the core materials 9a and 9b made of different materials coexist. When applied to a three-dimensional structure, the core material 9a of glass wool mainly exhibits excellent heat insulation performance at normal temperature, and the core material 9b of silica powder mainly exhibits high heat insulation performance at high temperatures, so that the surface corresponding to the core material 9a is in a normal temperature atmosphere. Thus, the surface corresponding to the core material 9b can be applied in a high temperature atmosphere.

  Further, since the core materials 9a and 9b are thermally welded, the plurality of core materials 9a and 9b are located in independent spaces, and the degree of vacuum in the space containing the specific core materials 9a and 9b is lowered. Even if this happens, the degree of vacuum of the space containing the other cores 9a and 9b does not decrease, and the deterioration of the heat insulation performance can be minimized.

  In addition, a sheet member 13 having a core material 9a, 9b-shaped hole 14 is provided between the two films 10, and the core material 9 is fitted in the hole 14, so that the core material 9a, 9b onto the film 10 is provided. The core materials 9a and 9b can be easily fixed even during vacuum evacuation, and the vacuum heat insulating material 8 can be easily manufactured.

  Since the sheet member 13 is made of the same material as the heat-welded layer of the film 10, sufficient sealing strength can be ensured even by heat-welding the film 10 and the sheet member 13.

  Moreover, since the vacuum heat insulating material 8 forms a hexahedral structure, it can be applied to a hexahedral structure.

  Moreover, the vacuum heat insulating material 8 forms the three-dimensional structure by sticking the tape 15 to an edge part, and makes it possible to hold | maintain the three-dimensional structure of the vacuum heat insulating material 8 strongly and for a long term.

  Moreover, since the tape 15 has flame retardancy, it is easy to use the vacuum heat insulating material 8 in a high temperature environment.

(Embodiment 2)
FIG. 6 is a cross-sectional view of the vacuum heat insulating material according to Embodiment 2 of the present invention.

  In FIG. 6, the vacuum heat insulating material 8 has the same configuration as that of the first embodiment except for the thicknesses of the core material 9a and the core material 9b. In the present embodiment, the core material 9a has a thickness of 5 mm, and the core material 9b has a thickness of 1 mm.

  As described above, since the core materials 9a and 9b having different thicknesses coexist in the present embodiment, the surface corresponding to the core material 9b when the vacuum heat insulating material 8 in the present invention is applied to a three-dimensional structure. Can apply the vacuum heat insulating material 8 to a space saving space from the surface corresponding to the core material 9a.

(Embodiment 3)
FIG. 7 is a plan view of the vacuum heat insulating material according to Embodiment 3 of the present invention, and FIG. 8 is a three-dimensional view of the vacuum heat insulating material according to the same embodiment.

  In FIG. 7, the vacuum heat insulating material 8 is arrange | positioned so that the expanded view of a three-dimensional structure may be formed with the pentagonal core material 9c. Between each core member 9c is a folding line 11 for forming a three-dimensional structure.

  A vacuum heat insulating material 8 shown in FIG. 8 is formed by bending the vacuum heat insulating material 8 shown in FIG. 7 along a folding line 11, and an end portion thereof is fixed with a sealing agent 16 made of a flame-retardant material.

  As described above, in the present embodiment, since the core material 9c is a pentagon, the folding line 11 positioned between the core materials 9c can be formed in five directions.

  In the present embodiment, the shape of the core material 9c is a pentagon, but may be another polygon. By forming the core material 9c into a polygonal shape, the folding lines 11 positioned between the core materials 9c can be formed in multiple directions, and the vacuum heat insulating material 8 forming various three-dimensional structures can be produced. it can.

  Moreover, the vacuum heat insulating material 8 forms the three-dimensional structure by fixing an edge part with the sealing agent 16, and it becomes possible to hold | maintain the three-dimensional structure of the vacuum heat insulating material 8 strongly and for a long term.

  Moreover, since the sealing agent 16 has flame retardancy, it is easy to use the vacuum heat insulating material 8 in a high temperature environment.

(Embodiment 4)
FIG. 9 is a plan view of a vacuum heat insulating material according to Embodiment 4 of the present invention, and FIG. 10 is a three-dimensional view of the vacuum heat insulating material according to the same embodiment.

  In FIG. 9, the vacuum heat insulating material 8 is arranged so as to form a development view of a three-dimensional structure with a pentagonal core material 9c and a hexagonal core material 9d, and a three-dimensional structure is provided between the core materials 9c and 9d. There is a folding line 11 to form.

  A vacuum heat insulating material 8 shown in FIG. 10 is formed by bending the vacuum heat insulating material 8 shown in FIG.

  As described above, in the present embodiment, since the core material 9c is a pentagon and the core material 9d is a hexagon, a curved surface structure can be formed.

  In the present embodiment, the core material 9c is pentagonal and the core material 9d is hexagonal, but the combination of the core material shapes is arbitrary, and combinations of core materials of various shapes are possible. A folding line located between the core materials can be freely designed, and a vacuum heat insulating material that forms a desired three-dimensional structure can be produced.

  As described above, since the vacuum heat insulating material according to the present invention can form various three-dimensional structures, there are few restrictions on the shape of the three-dimensional structure to be applied, and the versatility is wide.

The top view of the vacuum heat insulating material in Embodiment 1 of this invention The top view in the manufacture process of the vacuum heat insulating material in Embodiment 1 of this invention AA line sectional view of FIG. The top view of the sheet | seat member of the vacuum heat insulating material in Embodiment 1 of this invention The perspective view of the state which bent the vacuum heat insulating material in Embodiment 1 of this invention in three dimensions Sectional drawing of the vacuum heat insulating material in Embodiment 2 of this invention The top view of the vacuum heat insulating material in Embodiment 3 of this invention The perspective view of the state which bent the vacuum heat insulating material in Embodiment 3 of this invention in three dimensions The top view of the vacuum heat insulating material in Embodiment 4 of this invention The perspective view of the state which bent the vacuum heat insulating material in Embodiment 4 of this invention three-dimensionally Plan view of conventional vacuum insulation Sectional drawing of the state which provided the conventional vacuum heat insulating material in the outer box of the heat insulation box

Explanation of symbols

8 Vacuum heat insulating material 9a, 9b, 9c, 9d Core material 10 Film 13 Sheet member 14 Hole 15 Tape 16 Sealing agent

Claims (12)

  In a vacuum heat insulating material formed by covering a plurality of core materials with a gas barrier film and decompressing the inside of the film, the plurality of core materials are arranged so as to form a development view of a three-dimensional structure, in the film, A vacuum heat insulating material, wherein the entire surface of a portion not including a plurality of core materials between the films is heat-welded.   The space | interval between each core material is below the thickness of a core material, The vacuum heat insulating material of Claim 1 characterized by the above-mentioned.   The vacuum heat insulating material according to claim 1 or 2, wherein the shape of the core material is a polygon formed by three or more line segments.   The vacuum heat insulating material according to any one of claims 1 to 3, wherein core materials having different shapes coexist.   The vacuum heat insulating material according to any one of claims 1 to 4, wherein core materials having different thicknesses coexist.   The vacuum heat insulating material according to any one of claims 1 to 5, wherein a core material made of different materials coexists.   The vacuum heat insulating material according to any one of claims 1 to 6, wherein a sheet member made of the same material as that of the heat welding layer of the film is provided between the two films. .   The vacuum heat insulating material according to any one of claims 1 to 7, wherein a three-dimensional structure is formed based on the developed view.   The vacuum heat insulating material according to claim 8, wherein a three-dimensional structure is formed by sticking a tape to an end portion.   The vacuum heat insulating material according to claim 9, wherein a flame retardant tape is used as the tape.   The vacuum heat insulating material according to claim 8, wherein a three-dimensional structure is formed by fixing the end portion with a sealant.   The vacuum heat insulating material according to claim 11, wherein a flame retardant sealant is used as the sealer.

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