WO2006009063A1

WO2006009063A1 - Vacuum thermal insulation material, thermal insulation apparatus using the material, and refrigerator-freezer

Info

Publication number: WO2006009063A1
Application number: PCT/JP2005/013028
Authority: WO
Inventors: Keisuke Tsunetsugu
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2004-07-16
Filing date: 2005-07-14
Publication date: 2006-01-26
Also published as: CN1860326A; DE112005000069B4; CN100529504C; DE112005000069T5; JP2006029456A; KR20060063982A

Abstract

At least one or more grooves are formed in a vacuum thermal insulation material, and the insulation material is bent at the grooves and not at surrounding fillet sections adjacent to the grooves. By this, stress in a laminated film occurring at groove end sections, which are boundaries between the grooves and the surrounding fillet sections, can be reduced. This enables the area of small cracks occurring in that portion of the laminated film which is in the groove end sections to be restricted to minimum. As a result, reduction in thermal insulation performance over time can be restricted even if the vacuum thermal insulation material is bent.

Description

Specification

Vacuum heat insulating material, heat insulation equipment and refrigerator using the same

Technical field

TECHNICAL FIELD [0001] The present invention relates to a vacuum heat insulating material, a heat and cold insulation device using the same, a refrigerator-freezer and the like.

Background art

[0002] A vacuum heat insulating material is very rigid because the inside of a film as a covering material is depressurized and atmospheric pressure is applied to the covering material. For this reason, the film tends to be damaged when trying to form, so it is used as it is in most applications. Depending on the shape of the application location, multiple pieces are used.

[0003] Therefore, an example of a method for imparting a bendability to the vacuum heat insulating material in order to suppress heat leakage of the seam partial force of the vacuum heat insulating material is disclosed in Japanese Patent Laid-Open No. 2001-336691. The vacuum heat insulating material is hermetically sealed by covering the core material with a gas-nore film and depressurizing the inside. Then, at least one groove is formed on the side surface perpendicular to the thickness direction of the vacuum heat insulating material by compression molding. A gas-nore film consists of a laminate film in which metal foil and plastic film are laminated, and a laminate film in which vapor-deposited plastic film is laminated, and a laminate film in which vapor-deposited plastic film is laminated. The groove is bent so that the surface becomes the outer surface.

[0004] In order to impart bending properties to the vacuum heat insulating material while pressing, at least one groove portion is formed in a state where the peripheral fin portion adjacent to the groove portion is bent, and the vacuum heat insulating material is used in the groove portion. When bent, there are the following problems. At the end of the groove, that is, at the boundary between the groove and the surrounding fin, a plastic film on which metal foil has been vapor-deposited may cause minute cracks, which may increase partial force gas penetration. It is necessary to improve the deterioration of heat insulation performance over time.

[0005] Further, when at least one deep groove is formed on the laminated film surface in which the metal foil and the plastic film are laminated, and is bent at the groove so that the surface becomes the inner surface, the metal foil is formed over the entire groove. Since minute cracks may occur and partial force gas intrusion may occur, it is necessary to further improve the deterioration of heat insulation performance over time. Disclosure of the invention

[0006] According to the present invention, a groove for folding the vacuum heat insulating material is formed in the vacuum heat insulating material, and the fin adjacent to the end of the groove of the fins around the vacuum heat insulating material is not bent and is bent at the groove. Provide vacuum insulation.

[0007] This reduces the stress on the laminating film that occurs at the end of the groove, that is, the boundary between the groove and the surrounding fin, so that the metal foil generated at the end of the groove is deposited. The area of small cracks in the plastic film can be minimized.

[0008] Further, the present invention is such that a groove is formed on the laminated film surface on which the outer cover material is vapor-deposited, and is folded at the groove so that the laminated film surface on which the vapor-deposited plastic film is laminated is the inner surface. Provide vacuum insulation material that can be used.

[0009] Accordingly, since the laminate film on which the bent portion, which is the portion where the stress is most applied to the film by bending, is deposited, is a film on which particles are deposited, and is flexible, The depth of a crack can be made smaller than the size of a crack generated in a metal foil when a deep groove is formed and bent in a laminated film in which a plastic film is laminated. As a result, the increase in gas penetration into the vacuum insulation can be reduced.

[0010] Furthermore, the present invention provides a heat and cold insulation device and a refrigerator using the vacuum heat insulating material.

FIG. 1 is a cross-sectional view of a vacuum heat insulating material in Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view of a main part of the vacuum heat insulating material in Embodiment 1 of the present invention.

FIG. 3 is a plan view of the vacuum heat insulating material according to Embodiment 1 of the present invention.

FIG. 4 is a diagram showing a vacuum heat insulating material according to Embodiment 1 of the present invention.

FIG. 5 is a view showing a vacuum heat insulating material in Embodiment 2 of the present invention.

FIG. 6 is a diagram showing a vacuum heat insulating material in Embodiment 3 of the present invention.

FIG. 7 is a cross-sectional view of a refrigerator-freezer according to Embodiment 8 of the present invention.

FIG. 8 is a cross-sectional view of a refrigerator-freezer according to Embodiment 9 of the present invention. FIG. 9 is a cross-sectional view of the refrigerator-freezer according to Embodiment 10 of the present invention.

Explanation of symbols

[0012] 1 Vacuum insulation

2 Jacket material

3 Core material

10, 14, 16 Groove

12 Fins

13 Fins adjacent to the groove

15, 17 Core material outside the groove

18a, 18b, 18c refrigerator body

19a, 19b, 19c outer box

20a, 20b, 20c inner box

23a, 23b, 23c Freezer

BEST MODE FOR CARRYING OUT THE INVENTION

[0013] The present invention provides a core material composed of an aggregate of inorganic fibers and a vacuum heat insulating material in which the core material is covered with a jacket material and the inside is depressurized and sealed, and a groove portion for bending the vacuum heat insulating material is formed in the vacuum. Provided is a vacuum heat insulating material that is formed on a heat insulating material, and is not bent at a fin portion adjacent to the end of the groove portion among the fin portions around the vacuum heat insulating material, and the vacuum heat insulating material is bent at the groove portion. To do. Since the stress on the laminating film that occurs at the end of the groove, that is, the boundary between the groove and the surrounding fin, can be reduced, the area of minute cracks in the plastic film on which metal foil is deposited at the end of the groove Can be minimized. Further, even when the vacuum heat insulating material is bent, the temporal deterioration of the heat insulating performance can be reduced. Further, since the range of application is widened by imparting bendability, it is possible to provide a vacuum heat insulating material having a small change with time in the heat insulating performance. In addition, the fin part in this invention means the fin-shaped part which only the jacket material which can be formed in the outer peripheral part of a vacuum heat insulating material also has force.

Furthermore, the present invention provides a vacuum heat insulating material in which the groove width is set so that the core material outside the groove does not contact the groove when bent, and the groove is bent around one groove. Like this Thus, it is possible to minimize the number of ridge lines generated at the end of the groove, that is, at the boundary between the groove and the peripheral fin. As a result, it is possible to minimize the area of minute cracks in the laminate film in which a rapid stress is exerted on the film due to the presence of the ridgeline, so that the deterioration in heat insulation performance with time can be reduced.

[0015] Further, in the present invention, the jacket material includes a laminate film in which a metal foil and a plastic film are laminated, and a laminate film in which a vapor-deposited plastic film is laminated. Provided is a vacuum heat insulating material in which a groove is formed on the surface of a laminated film on which vapor deposition has been performed, and the groove is formed so that the surface on which the groove is formed becomes an inner surface. In this way, the laminate film force where the bent part, which is the most stressful part of the film by folding, is deposited. Because the film is a film on which particles are deposited, it is flexible, so a laminate in which metal foil and plastic film are laminated. The depth of a crack can be made smaller than the size of a crack generated in a metal foil when a groove is formed in a depth and bent. As a result, it is possible to reduce the increase in gas intrusion into the vacuum heat insulating material and to reduce the temporal deterioration of the heat insulating performance.

[0016] The present invention also provides a vacuum heat insulating material in which the core material has a flexural strength of 0.02-0.05 MPa. In this way, it is possible to reduce the bending strength required when bending the vacuum heat insulating material while maintaining the handleability of the core material during the production of the vacuum heat insulating material, thereby improving the work efficiency of the operator. This can reduce labor costs during mass production. The bending strength is measured with Shimadzu Autograph AGS-H 5KN, and the sample size at that time is 120mm x 25mm.

[0017] The present invention also provides a vacuum heat insulating material in which a laminate film includes a film layer made of an ethylene butyl alcohol copolymer (EVA). In this way, even when a groove is formed, or when a groove is formed and bent, even if a plastic film deposited with metal foil is stressed and cracks occur, EVA is excellent in gas noria. A film layer made of the above is included in the laminating structure !, so the deterioration of the heat insulation performance due to gas intrusion can be minimized.

[0018] Furthermore, the present invention provides a vacuum heat insulating material in which the core has a surface hardness of 40-80. In this way, the handling of the core material at the time of vacuum insulation material production is maintained, and the surface of the vacuum insulation material is maintained. Since the hardness is set to the minimum, the pressing pressure when forming the groove by press molding can be reduced. As a result, damage to the outer bag due to the fiber core material inside the vacuum heat insulating material piercing the internal force can be minimized, and the deterioration of the heat insulating performance over time can be reduced.

The present invention also provides a vacuum heat insulating material whose core material is binder-free. When the groove is formed in the vacuum heat insulating material by press working or when the groove is bent in the groove, the core material is crushed in the groove and no gas is generated. In other words, it is possible to minimize the possibility of a decrease in the heat insulation performance due to gas generation, so that the heat insulation performance can be improved.

[0020] The present invention provides a vacuum heat insulating material in which the jacket material has a tensile strength of 70-220N. In this way, the cost can be reduced, and even if the groove is formed and bent by press molding, damage to the outer bag can be suppressed and the deterioration of the heat insulation performance over time can be reduced.

[0021] Furthermore, the present invention provides a heat and cold insulation device in which the vacuum heat insulating material of the present invention is disposed in a space formed by an outer box, an inner box, and the outer box and the inner box. As a result, it is no longer necessary to use a plurality of vacuum heat insulating materials to avoid the corners as in the past, even in the areas where the bent portions exist, and the seam force when two sheets are used is also generated. Heat loss can be prevented, and the heat insulation performance of the heat and cold insulation equipment can be improved.

Furthermore, the present invention provides a refrigerator in which the vacuum heat insulating material of the present invention is attached to a freezer compartment.

In this way, it is not necessary to use multiple vacuum insulation materials in the freezer compartment where there are many folding points, as in the past, so that the heat loss caused by the joint force can be greatly prevented. As a result, the power consumption of the refrigerator can be reduced. In addition, it has been necessary to produce multiple vacuum insulation materials in the past, and even if the manufacturing cost is excessive, it is only necessary to produce one vacuum insulation material, thus reducing production costs. can do.

[0023] The present invention also provides a refrigerator in which the vacuum heat insulating material of the present invention is attached to an inner box. The laminated film surface, which has been vapor-deposited inferior to that of a gas foil with a metal foil, can be attached to the inner box on the low temperature side after processing the vacuum insulation. Therefore, it is possible to suppress the deterioration of heat insulation performance over time, and at the same time, the conventional seam Since the heat loss that was also generated can be prevented, the power consumption of the refrigerator can be further reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments. In addition, the drawing is a schematic diagram and does not show each positional relationship correctly in dimension.

[Embodiment 1]

Embodiment 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, the vacuum heat insulating material 1 is a material in which the core material 3 is covered with an outer covering material 2 and the inside is decompressed and sealed.

As shown in FIG. 2, the outer cover material 2 is composed of a laminate film in which a metal foil and a plastic film are laminated, and a plastic film on which vapor deposition has been performed. The laminate film in which the metal foil and the plastic film are laminated is composed of a nylon film 4, a nylon film 5, an aluminum foil film 6, and a low density polyethylene film 7 in addition to the outer cover. The plastic film on which the vapor deposition has been performed is composed of a nylon film 4 having an outer force, a polyethylene terephthalate (PET) film 8 on which the vapor deposition has been performed, a PET film 9 on which the vapor deposition has been performed, and a low density polyethylene film 7. The two laminated films are made in a three-sided seal.

[0027] The core material 3 also has an aggregate strength of glass fibers, and was used after being dried in a drying furnace at 140 ° C for 1 hour. The core material 3 was inserted into the jacket material 2, the inside was depressurized to lOPa, and the opening was sealed by heat welding. In FIG. 1, the groove is not formed.

Next, as shown in FIG. 3, the vacuum heat insulating material 1 having a thickness of 11 mm has a groove portion 10 having a width of 5 mm and a depth of 4.5 mm, a groove end portion 11, upper and lower fin portions 12, and a fin adjacent to the groove portion 10. Part 13 is provided. Further, only the upper and lower fin portions 12 are bent, and the fin portion 13 adjacent to the groove portion 10 is not bent. Further, as shown in FIG. 4, the vacuum heat insulating material 1 is bent 60 degrees at the groove 10 portion.

[0029] The operation and action of the vacuum heat insulating material 1 configured as described above will be described below.

First, the stress on the laminating film that occurs at the groove end 11, that is, at the boundary between the groove 10 and the peripheral fin 13 can be reduced. As a result, the area of minute cracks in the aluminum foil film or the vapor-deposited PET film generated at the groove end 11 can be minimized, so that the heat insulation performance can be improved even when the vacuum heat insulating material 1 is folded. Over time The decrease can be reduced. In addition, since the range of application is widened by imparting bendability, it is possible to provide the vacuum heat insulating material 1 with little thermal change and excellent heat insulating performance.

[0030] For example, when the vacuum insulation material 1 bent and bent as described above is subjected to an acceleration test for 30 days in an aging furnace at 100 ° C, heat conduction is higher than that of a flat plate vacuum insulation material that has not been bent. The rate degradation was 1.2 times.

On the other hand, when the fin portion 13 adjacent to the groove portion 10 is bent and the vacuum heat insulating material 1 is bent at the groove portion 10, the number of ridge lines generated at the boundary between the groove portion 10 and the groove portion 13 adjacent to the groove portion 10 is reduced. The stress on the laminate film increases. As a result, the area of minute cracks in the aluminum foil and vapor deposited PET film generated at the groove end 11 is increased. Degradation of double thermal conductivity was confirmed.

[0032] The inorganic fiber used for the core material 3 is preferably glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool, or carbonized fiber. In particular, it is not limited to these. In addition, a binder may be used to improve handling when the board is heated and pressed.

[0033] The nylon of the jacket material 2 having a laminate structure is preferably a nylon film excellent in various mechanical properties such as impact resistance, flex resistance and tensile strength. Examples include Nai Nun 6, Nylon-66, MXD Nylon and the like. The use of aromatic nylon is particularly preferable because it can further improve the gas noriness. However, it is not limited to these. As the form of the nylon film, a single layer nylon film, a multilayer nylon film co-extruded with different types of nylon, and the like are used, and are not particularly limited.

[0034] In addition to the nylon film, a stretched product of a PET film or a polypropylene (PP) film can be used, and the use of the PET film can improve the water vapor nooriety.

[0035] The metal foil and vapor deposition particles of the outer cover material 2 having a laminate structure are not limited to these forces capable of using aluminum, stainless steel, iron or the like.

[0036] The thermal welding layer of the jacket material 2 has the highest gas permeability among the films constituting the jacket material 2. The properties of the heat-welded layer greatly affect the time-dependent change in the heat insulating performance of the vacuum heat insulating material 1. The thickness of the heat-welded layer is the stability of the sealing quality in the reduced-pressure sealing process, the suppression of gas intrusion from the end face of the heat-welded part, and the heat in the case of using metal foil as a laminated film on which vapor deposition has been performed. Considering heat leak of surface force due to conduction, 25 m-60 μm force is suitable.

[0037] Examples of the material of the heat-welded layer include, but are not limited to, a force capable of using an unstretched PP film, a high-density polyethylene film, a linear low-density polyethylene film, and the like.

[0038] Examples of the bag shape of the jacket material 2 include forces such as a four-side seal bag, a gusset bag, a three-side seal bag, a pillow bag, a center tape seal bag, and the like.

[0039] Further, in order to further improve the initial heat insulating performance and the temporal change of the heat insulating performance of the vacuum heat insulating material 1, a getter material such as a gas adsorbent or a water adsorbent may be used. The adsorption mechanism may be any of physical adsorption, chemical adsorption, occlusion, and sorption, but a substance that acts as a non-evaporable getter is good. Specific examples include physical adsorbents such as synthetic zeolite, activated carbon, activated alumina, silica gel, dawsonite, and hydrated talcite.

[0040] As the chemical adsorbent, alkali metal or alkaline earth metal oxides, alkali metal or alkaline earth metal hydroxides, or the like can be used. In particular, lithium oxide, lithium hydroxide, calcium oxide, calcium hydroxide, magnesium oxide, magnesium hydroxide, barium oxide, and barium hydroxide are effective. In addition, calcium sulfate, magnesium sulfate, sodium sulfate, sodium carbonate, potassium carbonate, calcium chloride salt, lithium carbonate, unsaturated fatty acid, iron compound, etc. also act effectively.

[0041] Further, it is more effective to apply a getter material obtained by singly or alloying a material such as norium, magnesium, calcium, strontium, titanium, zirconium, or nonadium.

[0042] Furthermore, in order to adsorb and remove at least nitrogen, oxygen, moisture, and carbon dioxide, such a getter substance can be mixed and applied.

[0043] The manufacturing method of the vacuum heat insulating material 1 is as follows. First, the jacket material 2 is produced, and then the core material 3 is placed in the jacket material 2. It may be inserted and the inside reduced in pressure and sealed. Alternatively, the core material 3 and the outer cover material 2 that also has a roll-like or sheet-like laminate film force are installed in the decompression tank, and the roll-like or sheet-like outer cover material 2 is placed along the core material 3. The vacuum heat insulating material 1 may be produced by thermally welding the outer covering material 2. In particular, it is not limited to these.

[0044] (Embodiment 2)

FIG. 5 is a schematic diagram showing a vacuum heat insulating material in Embodiment 2 of the present invention.

In FIG. 5, the vacuum heat insulating material having a thickness of 11 mm is bent 60 degrees by a groove portion 14 having a width of 12 mm and a depth of 4.5 mm, and the core material 15 outside the groove portion is not in contact with the groove portion 14. That is, they do not interfere with each other.

The operation and action of the vacuum heat insulating material configured as described above will be described below.

[0047] First, since the number of the groove portions 14 is one, the number of ridge lines generated at the end portions of the groove portions, that is, at the boundary between the groove portions 14 and the peripheral fin portions can be minimized. As a result, the presence of the ridgeline applies abrupt stress to the film, minimizing the area of minute cracks that occur in the laminated film that has been deposited, thereby minimizing the deterioration of thermal insulation performance over time. be able to.

[0048] Further, since the width of the groove portion 14 is set so that the core material 15 outside the groove portion at the time of bending, that is, the core material adjacent to the groove portion 14 does not come into contact with the groove portion, extra generated by the contact of the core material. Ridgelines can be eliminated. As a result, the presence of the ridgeline applies abrupt stress to the film, minimizing the area of minute cracks generated in the laminated film that has been vapor-deposited. it can.

[0049] Next, when the accelerating test for 30 days in a 100 ° C aging furnace was performed on the above-mentioned folded vacuum insulation material, the heat conduction was only 1.1 times that of the unprocessed flat plate vacuum insulation material. Deterioration of rate was ineffective. On the other hand, when the width of the groove portion 14 is set to 5 mm and the vacuum heat insulating material is bent at the groove portion, the number of ridge lines generated at the boundary between the groove portion 14 and the fin portion adjacent to the groove portion 14 increases. As a result, the stress on the laminate film increases and the area of the micro cracks in the laminate film generated at the end of the groove increases, confirming that the thermal conductivity has deteriorated by a factor of 1.2 compared to flat plate vacuum insulation. It was done. [0050] (Embodiment 3)

FIG. 6 is a schematic diagram showing a vacuum heat insulating material in Embodiment 3 of the present invention.

[0051] As shown in FIG. 6, the vacuum heat insulating material having a thickness of 11 mm is bent 90 degrees by the groove portion 16 having a width of 12 mm and a depth of 6.5 mm, and the core material 17 outside the groove portion is not in contact with the groove portion 16. . That is, there is no interference. Further, the groove 16 exists on the side of the laminated film surface on which the vapor deposition has been performed, and is bent with the portion inside.

[0053] First, the portion of the film that is most stressed by bending is a laminated film on which the bent portion is vapor-deposited. Because it is a film on which particles have been deposited and is flexible, the crack size is larger than the size of the crack that occurs in the metal foil when the metal film and plastic film are laminated and the groove is formed and bent. The depth can be reduced. As a result, the increase in gas penetration into the vacuum heat insulating material can be reduced, and the deterioration of the heat insulation performance with time can be reduced. The vacuum insulation material that was bent at a depth of 6.5 mm and a bending angle of 90 degrees was subjected to an accelerated test for 30 days in a 100 ° C aging furnace. Compared with flat plate vacuum insulation, which was not 1. 2 times, the thermal conductivity was degraded.

On the other hand, when the same groove portion 16 was formed on the laminated film surface side where the metal foil and the plastic film were laminated and bent with the groove portion 16 inside, the following was obtained. Metal foil The film is less flexible than the vapor-deposited film, so the area of minute cracks that occur in the metal foil is larger than the area of the smiley cracks that occur in the vapor-deposited film. Double degradation of thermal conductivity was confirmed.

[Embodiment 4]

The outer jacket material configuration of the present embodiment uses a vapor-deposited EVA film instead of the vapor-deposited PET 8 of the first embodiment.

[0056] In the present embodiment, a groove part having a width of 12mm and a depth of 7. Omm is formed on the laminated film surface on which the vapor deposition has been performed on the vacuum heat insulating material having a thickness of 11mm and having the above-described covering material structure. It is bent 90 degrees.

The operation and action of the vacuum heat insulating material configured as described above will be described below. [0058] First, since the laminate structure includes a layer of an EVA-powered film having excellent gas barrier properties, the following effects can be obtained. In other words, when a groove is formed, or when a groove is formed and bent, stress is applied to the laminated film surface on which vapor deposition has been applied, and even if the space between the vapor deposition particles on the vapor deposition surface becomes larger than usual, heat insulation performance due to gas intrusion Can be minimized.

[0059] A vacuum insulation material that was folded at a groove angle of 7. Omm and a bending angle of 90 degrees was subjected to an acceleration test in a 100 ° C aging furnace for 30 days. Compared to the flat plate vacuum insulation material that has not been applied, it has been 1.times.

[0060] (Embodiment 5)

In this embodiment, the core has a surface hardness of 40-80. Maintains the handling of the core material at the time of vacuum insulation material preparation, and sets the surface hardness of the vacuum insulation material to a minimum. As a result, the press pressure when forming the groove by press molding can be reduced, and the damage to the outer bag due to the fiber core material inside the vacuum heat insulating material piercing from the inside is minimized, and the heat insulating performance is improved. The change with time can be reduced.

[0061] Thus the bending mosquitoes卩E as shown in the third embodiment, even Gyotsu about 100 sheets vacuum heat insulating material, to maintain the initial thermal conductivity of 25 X 10- ⁴ WZmK less in all of the vacuum heat insulating material I was able to.

[0062] On the other hand, when a vacuum heat insulating material having a surface hardness of 81-100 is manufactured and bent as shown in Embodiment 3, two of the 100 vacuum heat insulating materials have an initial thermal conductivity of 100. x—More than ⁴ wZ mK.

[0063] When the surface hardness is less than 40, the handling efficiency of the vacuum heat insulating material is deteriorated because the core material handling property at the time of manufacturing the vacuum heat insulating material is poor.

[0064] The surface hardness was measured with a TECLOCK TECLOCK durometer (rubber / plastic hardness meter) GS-721N typeE in accordance with IS K6253.

[Embodiment 6]

In the vacuum heat insulating material in the present embodiment, the core material is binder-free, that is, does not include a binder. Since the core material does not contain a binder, the groove is formed by pressing the vacuum heat insulating material, or when the groove is formed in the vacuum heat insulating material and bent at the groove. Gas generation caused by pulverizing the core material in the portion can be suppressed. In other words, it is possible to minimize the generation of gas that may deteriorate the heat insulation performance, and thus improve the heat insulation performance.

[0066] Therefore, even if the folding cache as shown in the third embodiment is performed on 10 vacuum heat insulating materials, the initial thermal conductivity 25 X 10 ^_4 WZmK before the caking is obtained in all the vacuum heat insulating materials. I was able to maintain it.

[0067] On the other hand, when the bending calorie as shown in Embodiment 3 is performed on 10 vacuum heat insulating materials for the core material including the binder, initial heat conduction is performed on two of the 10 vacuum heat insulating materials. rate showed 26 X 10- ⁴ WZmK.

[0068] (Embodiment 7)

This embodiment is a vacuum heat insulating material whose outer shell material has a tensile strength of 70-220N. Since the tensile strength of the jacket material is 70 N or more, damage to the outer bag can be minimized and the change over time in the heat insulation performance can be reduced even if the groove is formed and bent by press molding. Further, if the tensile strength is 220 N, damage to the outer bag can be reduced even if the core is pressed until the core thickness at the time of pressing becomes zero. In addition, it will be expensive to provide a jacket material with a tensile strength exceeding 200N.

[0069] The tensile strength was the force at break when a sample with a shape of 100 mm X 15 mm was pulled at 200 mm / min using an autograph AGS-H 5KN manufactured by Shimadzu Corporation.

[0070] (Embodiment 8)

FIG. 7 shows a cross-sectional view of a refrigerator-freezer as an example of a heat and cold insulation device in Embodiment 8 of the present invention.

[0071] As shown in FIG. 7, the refrigerator body 18a includes a flat vacuum heat insulating material lb on one side of a space formed by an outer box 19a made of a steel plate casing and an inner box 20a made of ABS resin. Folded vacuum insulation material lc is provided. The space other than the vacuum heat insulating material 1 is foam-filled with a hard urethane foam 21a. Furthermore, it has a refrigerator compartment 22a, a freezer compartment 23a, a machine compartment 24a, and a compressor 25a.

[0072] The operation and action of the vacuum heat insulating material configured as described above will be described below. [0073] First, the vacuum heat insulating material lc is applied by bending in advance according to the shape of the inner wall of the outer box. Therefore, even if the vacuum heat insulating material is folded and used, the temporal deterioration of the heat insulating performance can be minimized.

[0074] Further, in the present embodiment, since the refrigerator applies one folded vacuum heat insulating material to the place where two flat plate vacuum heat insulating material is originally applied, heat leakage from the joint portion. Can be greatly reduced.

[0075] Further, in the present embodiment, heat leakage from the machine room 24a into the refrigerator cabinet is greatly reduced, and the power consumption of the refrigerator can be greatly reduced, so that energy saving and cost performance are excellent. A refrigerator can be provided.

[0076] Further, in the present embodiment, the core material of the vacuum heat insulating material is made of inorganic fibers, so that the core material is nonflammable, which is excellent in terms of refrigerator safety.

[0077] (Embodiment 9)

FIG. 8 is a cross-sectional view of the refrigerator-freezer according to Embodiment 9 of the present invention.

[0078] In FIG. 8, the refrigerator main body 18b has a flat vacuum heat insulating material Id and a vacuum folded on one side of a space formed by an outer box 19b made of a steel plate and an inner box 20b made of ABS resin. A heat insulating material le is provided, and the space other than the vacuum heat insulating material 1 is foam-filled with rigid urethane foam 21b. Furthermore, it has a refrigerator compartment 22b, a freezer compartment 23b, a machine compartment 24b, and a compressor 25b.

[0079] The operation and action of the vacuum heat insulating material configured as described above will be described below.

[0080] First, the vacuum heat insulating material le is preliminarily bent and applied to the complicated shape of the freezer compartment 23b in accordance with the shape of the inner wall of the outer box. Therefore, even if the vacuum heat insulating material is folded and used, the deterioration of the heat insulating performance with time can be minimized.

[0081] In addition, in the refrigerator of the present embodiment, since a single folded vacuum heat insulating material is applied to a place where a plurality of flat plate vacuum heat insulating materials are originally applied, heat from the joint portion is used. Leakage can be greatly reduced.

[0082] In addition, conventionally, since it was necessary to produce a plurality of vacuum heat insulating materials, it took a long time to work. However, in this embodiment, it is only necessary to produce a single vacuum heat insulating material that is bent. Cost can be reduced.

[0083] (Embodiment 10) FIG. 9 is a sectional view of the refrigerator-freezer according to Embodiment 10 of the present invention.

[0084] In FIG. 9, the refrigerator main body 18c is a vacuum heat insulating material which is bent with a flat vacuum heat insulating material If on one side of a space composed of an outer box 19c made of a steel plate and an inner box 20c made of ABS resin. 1 g of material is placed, and the space other than the vacuum heat insulating material 1 is foam-filled with rigid urethane foam 21c. Furthermore, it has a refrigerator compartment 22c, a freezer compartment 23c, a machine compartment 24c, and a compressor 25c.

[0086] First, the vacuum heat insulating material lg is preliminarily folded and applied in accordance with the shape of the outer wall of the inner box having the surface protrusions. Therefore, even if the vacuum heat insulating material is folded and used, the deterioration of the heat insulating performance with time can be minimized.

[0087] Further, in the present embodiment, the refrigerator has a laminate constituting surface including a flexible vapor deposition film on the outer surface of the inner box which originally has a surface protrusion and is difficult to apply the vacuum heat insulating material. By using it as an affixed surface, it can be applied directly after being affixed directly to the inner box, so that heat leakage into the refrigerator can be greatly reduced.

Industrial applicability

[0088] Even if the vacuum heat insulating material according to the present invention is used after being bent, the deterioration of the heat insulating performance with time can be minimized. As a result, the range of application of vacuum heat insulating material is expanded, and it can be applied to heat and cold insulation devices, hot water heaters that can be used only with refrigerators, vending machines, vehicles, and houses.

Claims

The scope of the claims

[1] a core material composed of an aggregate of inorganic fibers;

A jacket material covering the core material and depressurizing and sealing the inside;

A groove,

The fin section,

A vacuum insulation material having

The vacuum heat insulating material which is bending the said fin part except the fin part adjacent to the said groove part edge part among the said fin parts in the outer peripheral part of the said vacuum heat insulating material while bending the said vacuum heat insulating material.

[2] The vacuum heat insulating material according to [1], wherein the width of the groove is set so that the core material outside the groove does not come into contact with the groove when bent, and is bent around the single groove.

[3] The jacket material is composed of a laminate film in which a metal foil and a plastic film are laminated, and a laminate film in which a vapor-deposited plastic film is laminated, and the jacket material is vapor-deposited. 2. The vacuum heat insulating material according to claim 1, wherein the groove is formed on a laminate film surface, and the groove is bent at the groove so that the surface on which the groove is formed becomes an inner surface.

4. The vacuum heat insulating material according to claim 3, wherein the laminate film includes a layer of a film made of an ethylene butyl alcohol copolymer! /.

[5] The vacuum heat insulating material according to claim 1 or 2, wherein the inorganic fiber of the core material has a glass fiber strength.

6. The vacuum heat insulating material according to claim 5, wherein the bending strength of the core material is 0.02-0.05 MPa.

7. The vacuum heat insulating material according to claim 5, wherein the core material has a surface hardness of 40-80.

8. The vacuum heat insulating material according to claim 5, wherein the core material is binder-free.

[9] The vacuum heat insulating material according to claim 1 or 3, wherein the outer jacket material has a tensile strength of 70-220N.

[10] The vacuum insulation according to claim 1 or 3, comprising an outer box, an inner box, and a vacuum heat insulating material disposed in a space formed by the outer box and the inner box. Thermal insulation using wood Cold equipment.

[11] An outer box, an inner box, a freezing room, a refrigeration room, and a vacuum heat insulating material disposed in a space formed by the outer box and the inner box are attached to the freezing room. The refrigerator according to claim 1 or 3, wherein the vacuum heat insulating material is a vacuum heat insulating material.

[12] An outer box, an inner box, a freezer compartment, a refrigerator compartment, and a vacuum heat insulating material disposed in a space formed by the outer box and the inner box are attached to the inner box. The refrigerator according to claim 1 or 3, wherein the vacuum heat insulating material is a vacuum heat insulating material.