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

A technology of vacuum heat insulation and core materials, which can be used in heat preservation, household refrigeration equipment, and pipeline protection through heat insulation, and can solve problems such as heat insulation performance reduction and gas intrusion

Active Publication Date: 2006-11-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Furthermore, if at least one or more deep grooves are formed on the laminated film formed by laminating metal foil and plastic film, and the groove is bent so that the surface becomes the inner surface, the entire area of ​​the groove will be , to generate minute cracks on the metal foil, there is a possibility of causing an increase in the intrusion of gas from that part, so it is more necessary to improve the thermal insulation performance over time

Method used

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

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Embodiment approach 1

[0045] use Figure 1-Figure 4 Embodiment 1 of the present invention will be described. Such as figure 1 As shown, the vacuum heat insulating material 1 is a vacuum heat insulating material formed by covering a core material 3 with an outer coating material 2 and depressurizing the inside thereof to seal it.

[0046] Such as figure 2 As shown, the outer covering material 2 is composed of a laminated film in which a metal foil and a plastic film are laminated, and a vapor-deposited plastic film. A laminated film formed by laminating a metal foil and a plastic film 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 vapor-deposited plastic film is composed of a nylon film 4, a vapor-deposited polyethylene terephthalate (PET) film 8, a vapor-deposited PET film 9, and a low-density polyethylene film 7 from the outside. . Two sheets of laminated film are sealed in three directions to form a pouc...

Embodiment approach 2

[0065] Figure 5 It is a schematic diagram which shows the vacuum heat insulating material of Embodiment 2 of this invention.

[0066] exist Figure 5 In this case, a vacuum heat insulating material with a thickness of 11 mm is bent at 60 degrees on 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 does not contact the groove portion 14 . That is, do not interfere with each other.

[0067] The operation and function of the vacuum heat insulating material constructed as above will be described below.

[0068] First, since one groove 14 is formed, the number of ridgelines generated at the edge of the groove, that is, at the boundary between the groove 14 and the surrounding ridges can be minimized. As a result, since the sharp stress acting on the film due to the presence of ridges can be suppressed, the area of ​​micro cracks generated in the vapor-deposited laminated film can be suppressed to a minimum, so...

Embodiment approach 3

[0072] Image 6 It is a schematic diagram which shows the vacuum heat insulating material of Embodiment 3 of this invention.

[0073] Such as Image 6 As shown, a vacuum heat insulating material having a thickness of 11 mm is bent at 90 degrees on a 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 . That is, do not interfere with each other. Furthermore, the groove portion 16 exists on the side of the laminated film surface on which vapor deposition has been performed, and this portion is bent inside.

[0074] The operation and function of the vacuum heat insulating material constructed as above will be described below.

[0075] First, the part of the film where the stress acts the most due to bending is the vapor-deposited laminated film at the bent portion. Because it is a thin film on which particles are vapor-deposited and has flexibility, it is similar to the cra...

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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

technical field [0001] The present invention relates to a vacuum heat insulating material, a thermal insulation and cold storage device using the vacuum heat insulating material, a freezer, and the like. Background technique [0002] The vacuum insulation material is very stiff because the inside of the film as the outer covering material is decompressed, and atmospheric pressure acts on the outer covering material. Therefore, it is easy to cause damage to the film when forming, so it is used flat in almost all application examples. Use the shape of the application site by dividing it into multiple pieces. [0003] Therefore, Japanese Unexamined Patent Application Publication No. 2001-336691 discloses an example of a method of imparting bendability to a vacuum heat insulating material in order to suppress heat leakage from a joint portion of the vacuum heat insulating material. In this vacuum heat insulating material, the core material is covered with an airtight film, and...

Claims

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Application Information

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IPC IPC(8): F16L59/065F25D23/06
CPCF16L59/065F25D23/06F25D2201/14
Inventor 常次启介
Owner PANASONIC CORP
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