KR20060063982A - Vacuum thermal insulation material, thermal insulation apparatus using the material, and refrigerator-freezer - Google Patents

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

VACUUM THERMAL INSULATION MATERIAL, THERMAL INSULATION APPARATUS USING THE MATERIAL, AND REFRIGERATOR-FREEZER}

The present invention relates to a vacuum insulator, a thermal insulation cold storage device, a refrigerator, a hot water supply machine, a vending machine, a vehicle, a house, and the like.

The vacuum insulator is very rigid because the inside of the film, which is the outer shell material, is depressurized, and the outer shell material is at atmospheric pressure. Therefore, since it is easy to damage a film when it tries to shape | mold, it is used as it is a flat plate in most application examples. Depending on the shape of the application location, a plurality of divided parts are used.

By the way, in order to suppress heat leakage from the joint part of a vacuum heat insulating material, the example of the method of providing bendability to a vacuum heat insulating material is disclosed by Unexamined-Japanese-Patent No. 2001-336691. The vacuum heat insulating material covers the core material with a gas barrier film, pressure-reduces the inside, and is sealed. And at least one groove part is formed in the side part perpendicular | vertical to the thickness direction of a vacuum heat insulating material by compression molding. The gas barrier film is composed of a laminate film in which a metal foil and a plastic film are laminated, and a laminate film in which a deposited plastic film is laminated, and in the groove part such that the laminated film surface on which the deposited plastic film is laminated becomes an outer surface. It is bending.

However, in order to provide bendability to the vacuum insulator, at least one or more grooves are formed in a state in which bent fillet sections adjacent to the grooves are bent and the vacuum insulator is bent in the grooves. There is. At the end of the groove portion, that is, the boundary between the groove portion and the surrounding fillet portion, minute wear occurs on the metal foil or the deposited plastic film, and there is a possibility that an increase in gas penetration from the portion may occur. There is a need to improve thermal insulation performance.

Further, when at least one deep groove is formed on the surface of the laminated film in which the metal foil and the plastic film are laminated, and bent at the groove so that the surface is on the inner surface, minute wear occurs on the metal foil throughout the groove, and the portion Since gas invasion may occur from the above, it is necessary to further improve the characteristics over time.

Summary of the Invention

The present invention provides a vacuum insulator which is bent in a groove without forming a groove for bending the vacuum insulator in the vacuum insulator and not bending the fillet portion adjacent to the groove end in the fillet portion around the vacuum insulator.

As a result, the stress on the laminate film generated at the edge of the groove portion, that is, the boundary between the groove portion and the surrounding fillet portion can be reduced, so that the area of minute wear of the metal foil or the plastic film subjected to the deposition at the groove portion is applied. Can be minimized.

Moreover, this invention provides the vacuum heat insulating material which bends in the groove part so that the groove part may be formed in the laminated film surface on which the outer skin material was vapor-deposited, and the laminated film surface on which the vapor deposition plastic film was laminated | stacked becomes an inner surface.

As a result, since the laminated film in which the bent portion, which is the portion of the film that is most stressed by bending, is deposited, is flexible in the film in which the particles are deposited, a deep groove is formed in the laminated film in which the metal foil and the plastic film are laminated. When it is bent, the magnitude of abrasion can be made smaller than the magnitude of abrasion generated in the metal foil. As a result, an increase in gas penetration into the vacuum insulator can be reduced.

In addition, the present invention provides a thermal insulation cold storage device and a refrigerator using the vacuum insulator.

1 is a cross-sectional view of a vacuum insulator according to Embodiment 1 of the present invention;

2 is an essential part cross sectional view of the vacuum insulator according to the first embodiment of the present invention;

3 is a plan view of the vacuum insulator according to the first embodiment of the present invention;

4 is a view showing a vacuum insulator according to Embodiment 1 of the present invention;

5 is a view showing a vacuum insulator according to Embodiment 2 of the present invention;

FIG. 6 is a view showing a vacuum insulator according to Embodiment 3 of the present invention; FIG.

7 is a sectional view of a freezer refrigerator according to the eighth embodiment of the present invention;

8 is a sectional view of a freezer refrigerator according to the ninth embodiment of the present invention;

9 is a sectional view of a freezer refrigerator according to the tenth embodiment of the present invention.

Explanation of the sign

1: vacuum insulation

2: shell material

3: core material

10, 14, 16: groove

12: fillet part

13: Fillet portion adjacent to the groove portion

15, 17: core material outside the groove portion

18a, 18b, 18c: refrigerator body

19a, 19b, 19c: outer box

20a, 20b, 20c: inner box

23a, 23b, 23c: freezer

The present invention provides a core material comprising an aggregate of glass fibers and a vacuum insulator which covers the core material with an outer cover material and decompresses the inside to seal the inside, wherein a groove for bending the vacuum insulator is formed in the vacuum insulator. Provided is a vacuum insulator in which the vacuum insulator is bent in the grooves without bending the fillet in the periphery of the vacuum insulator. Since the stress on the laminate film generated at the edge of the groove portion, that is, the boundary between the groove portion and the surrounding fillet portion can be reduced, the area of minute wear of the metal foil or the plastic film subjected to the deposition at the groove portion is minimized to a minimum. can do. Moreover, even when the vacuum heat insulating material is bent, the heat insulation performance with time can be improved. Furthermore, by providing bendability, the application range can be widened and a vacuum insulator excellent in heat insulation performance over time can be provided. In addition, the fillet part in this invention means the fillet-shaped part which consists only of the outer skin material which can become the outer peripheral part of a vacuum heat insulating material.

In addition, the present invention provides a vacuum insulator in which the width of the groove portion is set so that the core material outside the groove portion does not contact the groove portion at the time of bending and is bent around one groove portion. In this way, the number of ridges generated at the edge of the groove portion, that is, the boundary between the groove portion and the surrounding fillet portion can be minimized, so that the area of minute wear of the laminate film, which causes a sudden stress on the film due to the presence of the ridge line, is reduced. It can suppress to the minimum and can improve heat insulation performance with time.

In addition, the present invention is made of a laminate film in which the outer cover material is laminated with a metal foil and a plastic film, and a laminated film in which the deposited plastic film is laminated, and grooves are formed on the surface of the laminated film on which the outer cover material is deposited. Provided is a vacuum insulator that is bent in the groove so that the surface on which the additional portion is formed is an inner surface. In this way, since the laminated film in which the deposition of the bent portion, which is the portion of which the film is most stressed by bending, is deposited, is flexible in the film in which the particles are deposited, a deep groove is formed in the laminated film in which the metal foil and the plastic film are laminated. When it is bent, the size of the wear can be made smaller than the size of the wear generated on the metal foil, the increase in gas penetration into the vacuum insulator can be reduced, and the thermal insulation performance can be further improved over time.

Moreover, this invention provides the vacuum heat insulating material whose bending strength of a core material is 0.02-0.05 Mpa. In this way, while maintaining the handleability of the core material during the vacuum insulator production, the bending strength required for bending the vacuum insulator can be reduced, the work efficiency of the operator can be improved, and the labor cost during mass production can be reduced. . In addition, the measurement of bending strength is performed by Autograph AGS-H 5KN manufactured by Shimadzu Corporation of Japan, and the sample size at that time is 120x25 mm.

The present invention also provides a vacuum insulator comprising a layer of a film made of ethylene vinyl alcohol copolymer (EVA) in a laminate film. In this way, even when a groove part is formed, or when a groove part is formed and bent, when a metal foil and the plastic film on which the vapor deposition was performed were stressed and abrasion occurred, the layer of the film which consists of EVA which is excellent in gas barrier property is laminated composition In addition, since the fall of the heat insulation performance with time due to gas penetration is minimized, the heat insulation performance with time can be improved further.

In addition, the present invention provides a vacuum insulating material having a surface hardness of 40 to 80 of the core material. In this way, since the handleability of the core material at the time of manufacturing a vacuum heat insulating material is maintained, and the surface hardness of a vacuum heat insulating material is set to the minimum, the press pressure at the time of forming a groove part by press molding can be reduced. As a result, the damage to the outer bag by the fiber core material which jumps out from inside and sticks inside the vacuum heat insulating material can be suppressed to the minimum, and the heat insulation performance with time can be improved.

The present invention also provides a vacuum insulator in which the core material is binder free (without binder). When the grooves are formed in the vacuum insulator by press working or when the grooves are bent in the grooves after the grooves are formed, the core material is pulverized in the grooves so that no gas is generated from the binder. That is, the possibility that the heat insulation performance by gas generation will fall can be suppressed to the minimum, and heat insulation performance can be improved.

The present invention provides a vacuum insulator having a tensile strength of 70 to 220N. In this way, even if a cost is reduced and a groove part is bent and bent by press molding, damage to an outer bag can be suppressed and heat insulation performance can improve over time.

Moreover, this invention provides the thermal insulation cold storage apparatus which installed the vacuum insulation material of this invention in the space formed by the outer box, the inner box, and the said outer box and the inner box. As a result, in the part where a bend part exists, it is no longer necessary to use a plurality of vacuum heat insulating materials by avoiding a corner part like conventionally, and it prevents the heat loss which arose from the joint when two were used. It becomes possible to improve the heat insulation performance of the thermal insulation cold storage apparatus.

The present invention also provides a refrigerator having the vacuum insulator of the present invention attached to a freezer compartment. In this way, in a freezer compartment with many bending points, it is not necessary to avoid the bending points and use a plurality of vacuum insulators as in the prior art, and it is possible to greatly prevent the heat loss generated from the joints, thereby reducing the power consumption of the refrigerator. Can be reduced. In addition, conventionally, it is necessary to produce a plurality of vacuum insulators, and even when there is an excess in the manufacturing cost, one vacuum insulator may be produced, so that the manufacturing cost can be reduced.

The present invention also provides a refrigerator having the vacuum insulator of the present invention attached to an inner box. Since the surface of the laminated film on which the gas barrier property is deposited inferior to that of the metal foil laminate film can be deposited on the inner box on the low temperature side after processing the vacuum insulator, the heat insulation performance is improved over time. At the same time, it is possible to prevent the heat loss generated from the conventional joint, and to further reduce the power consumption of the refrigerator.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. In addition, this invention is not limited by this embodiment. In addition, the figure is schematic and does not show each positional relationship correctly dimensionally.

(Embodiment 1)

A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the vacuum heat insulating material 1 covers the core material 3 with the outer cover material 2, and pressure-reduces the inside.

As shown in FIG. 2, the outer cover material 2 is comprised from the laminated film in which metal foil and the plastic film were laminated | stacked, and the plastic film in which vapor deposition was 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 from the outside. The evaporated plastic film is composed of a nylon film (4), an evaporated polyethylene terephthalate (PET) film (8), an evaporated PET film (9), and a low density polyethylene film (7) from the outside. . The two laminate films are sealed in three directions and are umbilized.

Since the core material 3 consists of aggregates of glass fiber, what was dried for 1 hour in the drying furnace of 140 degreeC was used. The core material 3 was inserted into the outer cover material 2, the inside was pressure-reduced to 10 Pa, and the opening part was sealed by heat welding. In addition, the groove part is not formed in FIG.

Next, as shown in FIG. 3, the vacuum insulator 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, an upper and lower fillet portion 12, and a groove portion 10. The fillet part 13 adjacent to is provided. In addition, only the upper and lower fillet portions 12 are bent, and the fillet portions 13 adjacent to the groove portions 10 are not bent. In addition, as shown in FIG. 4, the vacuum heat insulating material 1 is bent 60 degrees in the part of the groove part 10. As shown in FIG.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material 1 comprised as mentioned above. First, it is possible to reduce the stress on the laminate film generated at the boundary between the groove end 11, that is, the groove 10 and the surrounding fillet 13. As a result, since the area of the minute abrasion of the aluminum foil film which arises in the groove part edge part 11, or the PET film in which the vapor deposition was performed can be suppressed to the minimum, even when the vacuum heat insulating material 1 is bent, the heat insulation performance with time is improved. Can be improved. Furthermore, by providing bendability, the application range can be widened and the vacuum heat insulating material 1 excellent in the heat insulation performance with time can be provided.

For example, if the vacuum insulation 1 bent as described above is subjected to an accelerated test for 30 days in an aging furnace at 100 ° C., the thermal conductivity deteriorates 1.2 times as compared to the flat vacuum insulation without bending. It was.

On the other hand, when the fillet part 13 adjacent to the groove part 10 is bent and the vacuum heat insulating material 1 is bent in the groove part 10, the groove part 10 and the fillet part 13 adjacent to the groove part 10 are bent. The number of ridges occurring at the boundary increases, and the stress on the laminate film increases. As a result, the area of minute wear of the aluminum foil generated on the groove end 11 and the deposited PET film is increased, so that deterioration of the thermal conductivity of 1.5 times that of the flat vacuum insulator was confirmed by the same accelerated test.

In addition, as an inorganic fiber used for the core material 3, glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool, silicon carbide fiber, etc. are preferable. Do. In particular, it is not limited to these. In addition, when carrying out heat press molding to a board shape, you may use a binder for a handleability improvement.

As a nylon of the outer cover material 2 of a laminated structure, the nylon film which is excellent in various mechanical characteristics, such as impact resistance, flex resistance, and tensile strength, is preferable. Examples thereof include nylon-6, nylon-66, MXD nylon and the like. The use of aromatic nylon is particularly preferred because it can further improve gas barrier properties. However, it is not limited to these. In addition, as a form of a nylon film, although the single layer nylon film, the multilayer nylon film which coextruded the heterogeneous nylon, etc. can be used, it is not specifically limited.

In addition to the nylon film, a stretched product of a PET film, a polypropylene (PP) film, or the like can be used, and the use of a PET film can improve the water vapor barrier property.

Although aluminum foil, stainless steel, iron, etc. can be used for the metal foil and vapor deposition particle | grains of the outer cover material 2 of a laminated structure, it is not limited to these.

The heat welding layer of the outer cover material 2 is the part with the largest gas permeability among the films which comprise the outer cover material 2, and the property of the heat welding layer has a big influence on the thermal insulation performance of the vacuum insulator 1 with time. The thickness of the heat welding layer is from the surface by heat conduction in the case of using the metal foil as the stability of the sealing quality in a pressure-sensitive sealing process, suppression of gas intrusion from the end surface of a heat welding part, or the deposited laminate film. In consideration of the heat leak of 25 mu m to 60 mu m is suitable.

As an example of the material of a heat welding layer, although an unstretched PP film, a high density polyethylene film, a linear low density polyethylene film, etc. can be used, it is not limited to these.

Moreover, although the sealing shape of the outer cover material 2 is a four way sealing bag, a gadget bag, a three way sealing bag, a pillow bag, the center tape sealing bag, etc., it is not limited to these.

In addition, a getter material such as a gas adsorbent or a moisture adsorbent may be used in order to further improve the initial heat insulating performance and the heat insulating performance over time of the vacuum heat insulating material 1. The adsorption mechanism may be any one of physical adsorption, chemisorption and occlusion, and sorption, but a substance that acts as a non-evaporable getter is preferred. Specifically, physical adsorbents such as synthetic zeolite, activated carbon, activated alumina, silica gel, dosonaito, hydrotalsaito and the like can be mentioned.

As the chemical adsorbent, an oxide of an alkali metal or an alkaline earth metal, a hydroxide of an alkali metal or an alkaline earth metal, 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 effectively work. In addition, calcium sulfate, magnesium sulfate, sodium sulfate, sodium carbonate, potassium carbonate, calcium chloride, lithium carbonate, unsaturated fatty acids, iron compounds and the like also work effectively.

In addition, it is more effective to apply a getter material obtained by singly or alloying materials such as barium, magnesium, calcium, strontium, titanium, zirconium and vanadium.

In addition, it is also possible to apply such a getter material in various mixtures in order to adsorb and remove at least nitrogen, oxygen, water and carbon dioxide.

In the manufacturing method of the vacuum heat insulating material 1, the outer shell material 2 may be produced first, and after that, the core material 3 may be inserted into the outer shell material 2 to seal the inside under reduced pressure. Alternatively, the core member 3 and the shell member 2 made of a rolled or sheet-like laminate film are provided in the decompression tank, and the rolled or sheet-shaped shell member 2 is made to conform to the core member 3. You may produce the vacuum heat insulating material 1 by heat-welding the outer cover material 2 in a state. In particular, it is not limited to these.

(Embodiment 2)

It is a schematic diagram which shows the vacuum heat insulating material in Embodiment 2 of this invention.

In Fig. 5, the vacuum insulator having a thickness of 11 mm is bent at 60 degrees by the 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 does not contact the groove portion 14. That is, they do not interfere with each other.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material comprised as mentioned above.

First, since the groove portion 14 is one, the number of ridges generated at the boundary between the groove end portion, that is, the groove portion 14 and the surrounding fillet portion can be minimized. As a result, the presence of the ridgeline causes a sudden stress on the film, and can minimize the area of minute abrasion generated in the laminated film on which the vapor deposition has been performed, thereby improving heat insulation performance over time.

In addition, since the width of the groove portion 14 is set so that the core material 15 outside the groove portion, that is, the core material adjacent to the groove portion 14 does not come into contact with the groove portion at the time of bending, it is an excess caused by the contact of the core material. You can get rid of the ridge. As a result, the presence of the ridgeline causes a sudden stress on the film, and can minimize the area of minute abrasion generated in the laminated film on which the vapor deposition has been performed, thereby improving heat insulation performance over time.

Next, when the bent vacuum insulator was subjected to an accelerated test for 30 days in an aging furnace at 100 ° C, there was no deterioration in thermal conductivity only 1.1 times that of the flat vacuum insulator not processed. On the other hand, when the width | variety of the groove part 14 is set to 5 mm, and a vacuum heat insulating material is bent in a groove part, the number of ridges which arise in the boundary of the groove part 14 and the fillet part adjacent to the groove part 14 increases. As a result, since the stress to a laminated film increases and the area of the minute abrasion of the laminated film which arises in a groove part edge part increases, the deterioration of the thermal conductivity of 1.2 times compared with the flat plate vacuum heat insulating material was confirmed.

(Embodiment 3)

It is a schematic diagram which shows the vacuum heat insulating material in Embodiment 3 of this invention.

As shown in FIG. 6, the vacuum insulator having a thickness of 11 mm is bent 90 degrees into 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 does not contact the groove portion 16. It is not. That is, it does not interfere. Moreover, the groove part 16 exists in the laminated film surface side in which vapor deposition was performed, and is bend | folded with the part inward.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material comprised as mentioned above.

First, the part which stresses a film by bending is the laminated film in which the bending part was vapor-deposited. Since it is flexible in the film | membrane in which the particle | grains were deposited, the magnitude | size of abrasion can be made smaller than the magnitude | size of the abrasion which arises in metal foil, when deep groove part is formed and bent in the laminated | multilayer film in which metal foil and a plastic film were laminated | stacked. As a result, an increase in gas penetration into the vacuum insulator can be reduced, and the heat insulation performance can be further improved over time. When the vacuum insulator, which was bent at a depth of 6.5 mm and the bending angle was 90 degrees, was subjected to an accelerated test for 30 days in an aging furnace at 100 ° C., 1.2 compared with the flat vacuum insulator which was not processed. There was no deterioration of thermal conductivity only.

On the other hand, when the same groove part 16 was shape | molded on the laminated film surface side in which metal foil and the plastic film were laminated | stacked, and it was bent with the groove part 16 inside, it became as follows. Since the flexibility of the metal foil film is inferior to that of the vapor deposition film, the area of minute abrasion generated in the metal foil increases than the area of minute abrasion generated in the deposited film, so that the thermal conductivity deteriorates by 1.3 times as compared to the flat plate vacuum insulator. Confirmed.

(Embodiment 4)

The shell material structure of this embodiment uses the EVA film in which vapor deposition was performed instead of the PET film 8 in which vapor deposition of Embodiment 1 was performed.

In this embodiment, a groove portion having a width of 12 mm and a depth of 7.0 mm is formed on the surface of the laminated film on which the vapor deposition is applied to a vacuum heat insulating material having a thickness of 11 mm having the above-described shell material configuration, and bent at 90 degrees from the groove portion.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material comprised as mentioned above.

First, since the layer of the film which consists of EVA which is excellent in gas barrier property is included in a laminated structure, it has the following effects. That is, when the groove is formed or when the groove is formed and bent, stress is applied to the laminated film surface on which the deposition is performed, and even when the deposition particles on the deposition surface are larger than usual, deterioration of the thermal insulation performance due to gas intrusion over time. Can be minimized, and the heat insulation performance can be further improved over time.

When the vacuum insulation material, which was bent at a depth of 7.0 mm and the bending angle was 90 degrees, was subjected to an accelerated test for 30 days in an aging furnace at 100 ° C., only 1.1 times as compared to the flat vacuum insulation material not processed. There was no deterioration of thermal conductivity.

(Embodiment 5)

This embodiment makes the surface hardness of a core material 40-80. The handleability of the core material at the time of manufacturing a vacuum heat insulating material is maintained, and the surface hardness of a vacuum heat insulating material is set to the minimum. As a result, the press pressure at the time of forming a groove part by press molding can be reduced, the damage to the outer bag by the fiber core material of a vacuum heat insulating material protruding from the inside to a minimum is suppressed to the minimum, and the heat insulation performance over time Can improve.

Therefore, even if the bending process shown in Embodiment 3 was performed about 100 sheets of vacuum heat insulating materials, the initial thermal conductivity of 25 * 10 <^-4> W / mK or less could be maintained in all the vacuum heat insulating materials.

On the other hand, when the vacuum hardness of 81-100 was produced and the bending process as shown in Embodiment 3 was performed, two of the 100 sheets of vacuum insulation showed an initial thermal conductivity of 100 × 10 ⁻⁴ W / mK or more.

In addition, when the surface hardness is smaller than 40, the core material handling property at the time of vacuum insulation material production is weak, and the working efficiency at the time of vacuum insulation material manufacture worsened.

In addition, the surface hardness was measured by the TECLOCK tech-lock durometer (rubber plastic hardness meter) GS-721N type E based on JISK6253.

(Embodiment 6)

In the vacuum heat insulating material in this embodiment, the core material does not contain binder free, ie, a binder. Since the core material does not contain a binder, when the groove is formed by pressing the vacuum insulator, or when the groove is formed in the vacuum insulator and bent in the groove, gas generation caused by the grinding of the core material in the groove can be suppressed. Can be. That is, since the gas generation which the possibility of heat insulation performance may fall can be suppressed to the minimum, heat insulation performance can be improved.

Therefore, even if the bending process shown in Embodiment 3 was performed with respect to 10 sheets of vacuum heat insulating materials, the initial thermal conductivity 25x10 <^-4> W / mK before processing was able to be maintained in all the vacuum heat insulating materials.

On the other hand, if the bending process as shown in Embodiment 3 is performed on the core material containing the binder with respect to 10 sheets of vacuum insulators, the initial thermal conductivity is 26 x 10 ^-4 W / mK in 2 of the 10 sheets. Indicated.

(Embodiment 7)

This embodiment is the vacuum heat insulating material whose tensile strength of a skin material is 70-220N. Since the tensile strength of the outer cover material is 70N or more, even if the groove portion is formed and bent by press molding, damage to the outer bag can be minimized and heat insulation performance can be improved over time. If the tensile strength is 220 N, even when the core material is pressed until the thickness of the core material becomes 0, the damage to the outer bag can be reduced less. In addition, it is expensive to have a tensile strength of more than 200N.

In addition, tensile strength was used as the force at the time of breaking when the sample of 100 * 15 mm pulled the sample of 100x15 mm at 200 mm / min using Autograph AGS-H 5KN by Shimadzu Corporation of Japan.

(Embodiment 8)

FIG. 7: shows sectional drawing of the refrigeration refrigerator as an example of the thermal insulation cold storage apparatus in Embodiment 8 of this invention.

As shown in FIG. 7, the refrigerator main body 18a includes a vacuum insulator 1b of a flat plate on one side of a space composed of an outer box 19a made of steel sheet and an inner box 20a made of ABS resin. The bent vacuum heat insulating material 1c is provided. And spaces other than the vacuum heat insulating material 1 are foam-filled with the rigid urethane foam 21a. Moreover, it has the refrigerator compartment 22a, the freezer compartment 23a, the machine room 24a, and the compressor 25a.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material comprised as mentioned above.

First, the vacuum heat insulating material 1c is bent and applied beforehand according to the outer box inner wall shape. Therefore, even if it bends and uses a vacuum heat insulating material, the fall of the heat insulation performance with time can be suppressed to the minimum.

In addition, in this embodiment, since the refrigerator applies one vacuum heat insulating material bend | folded by the place where the vacuum heat insulating material of two sheets is applied originally, the heat leakage in a joint part can be reduced significantly.

In addition, in this embodiment, since the heat leakage from the machine room 24a into the refrigerator can be greatly reduced, and the power consumption of the refrigerator can be greatly reduced, a refrigerator excellent in energy saving and cost performance can be provided.

Moreover, in this embodiment, since the core material is nonflammable by making the core material of a vacuum heat insulating material into an inorganic fiber, it is excellent also in the aspect of refrigerator safety.

(Embodiment 9)

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

In FIG. 8, the refrigerator main body 18b is the vacuum insulated 1d of the flat plate, and the vacuum bent in one surface of the space comprised by the outer box 19b which consists of steel plates, and the inner box 20b which consists of ABS resin. The heat insulating material 1e is provided, and the space other than the vacuum heat insulating material 1 is foam-filled with the rigid urethane foam 21b. Moreover, it has the refrigerator compartment 22b, the freezer compartment 23b, the machine room 24b, and the compressor 25b.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material comprised as mentioned above.

First, the vacuum heat insulating material 1e is bent and applied in advance to the part of the freezer compartment 23b of a complicated shape according to the outer box inner wall shape. Therefore, even if a vacuum heat insulating material is bent and used, the fall of the heat insulation performance with time can be suppressed to the minimum.

Furthermore, in the present embodiment, since the refrigerator uses one bent vacuum insulating material at a place where the vacuum heat insulating material of a plurality of flat plates is originally applied, heat leakage at the joint portion can be greatly reduced.

In addition, since the conventional work required the production of a plurality of vacuum insulators, it took a long time. However, in the present embodiment, one bent vacuum insulator may be produced, so that the manufacturing cost can be reduced.

(Embodiment 10)

9 is a cross-sectional view of the freezer refrigerator in the tenth embodiment of the present invention.

9, the refrigerator main body 18c is a vacuum heat insulating material bent with the vacuum heat insulating material 1f of a plate on one side of the space comprised of the outer box 19c which consists of steel plates, and the inner box 20c which consists of ABS resin. (1 g) is provided, and the space other than the vacuum heat insulating material 1 is foam-filled with the rigid urethane foam 21c. Moreover, it has the refrigerator compartment 22c, the freezer compartment 23c, the machine room 24c, and the compressor 25c.

The operation | movement and effect | action are demonstrated below about the vacuum heat insulating material comprised as mentioned above.

First, the vacuum heat insulating material 1g is bent and applied beforehand according to the inner box outer wall shape with a surface protrusion. Therefore, even if a vacuum heat insulating material is bent and used, the fall of the heat insulation performance with time can be suppressed to the minimum.

In addition, in the present embodiment, the refrigerator is frequently attached directly to the inner box by making a laminate construction surface including a vapor deposition film having a flexible surface on the inner box outer surface, which is inherently difficult to apply a vacuum insulator, having surface protrusions. By applying bending and bending, heat leakage to the inside of the refrigerator can be greatly reduced.

Even if the vacuum heat insulating material which concerns on this invention is bend | folded and used, the fall of the heat insulation performance with time can be suppressed to the minimum. As a result, the application range of a vacuum heat insulating material becomes wider, and it can apply to a thermal insulation cold storage apparatus, a refrigerator, a hot water supply machine, a vending machine, a vehicle, a house, etc.

Claims (12)

Core material which consists of aggregate of inorganic fiber, An outer cover material which covers the core material and reduces the pressure and seals the inside; A vacuum insulator having a groove portion, Among the fillet portions around the vacuum insulator, the fillet portion is bent except for the fillet portion adjacent to the groove end portion, and is bent in the groove portion. Vacuum insulation. The method of claim 1, The width of the groove portion is set to an amount such that the core material outside the groove portion does not contact the groove portion at the time of bending, and is bent around one of the groove portions. Vacuum insulation. The method of claim 1, The outer shell material includes a laminate film in which a metal foil and a plastic film are laminated, and a laminate film in which a deposited plastic film is laminated, and the groove portion is formed on a surface of the laminate film on which the shell material is deposited. Characterized in that the formed surface is bent in the groove so as to be the inner surface Vacuum insulation. The method of claim 3, wherein The laminate film comprises a layer of a film made of ethylene vinyl alcohol copolymer Vacuum insulation. The method according to claim 1 or 2, Inorganic fibers of the core material is characterized in that made of glass fibers Vacuum insulation. The method of claim 5, wherein The flexural strength of the core material is characterized in that from 0.02 to 0.05MPa Vacuum insulation. The method of claim 5, wherein The surface hardness of the core material is characterized in that 40 to 80 Vacuum insulation. The method of claim 5, wherein The core material is binder free Vacuum insulation. The method according to claim 1 or 3, The tensile strength of the shell material is characterized in that 70 to 220N Vacuum insulation. An outer box, an inner box, and a vacuum insulator provided in a space formed by the outer box and the inner box, wherein the vacuum insulator according to claim 1 or 3 is employed as the vacuum insulator. Thermal insulation cold appliance. An outer box, an inner box, a freezer compartment, a refrigerating compartment, and a vacuum insulator provided in a space formed by the outer box and the inner box, wherein the vacuum insulator according to claim 1 or 3 is attached to the freezer compartment. Characterized Frozen refrigerator. An outer box, an inner box, a freezer compartment, a refrigerator compartment, and a vacuum insulator provided in a space formed by the outer box and the inner box, and the vacuum insulator according to claim 1 or 3 is attached to the inner box. Characterized by Frozen refrigerator.

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