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Vacuum thermal insulating material and refrigerator using the same

A technology of vacuum insulation materials and refrigerators, which is applied in applications, household appliances, heat exchange equipment, etc., can solve the problems of reduced insulation performance, low productivity, and shape restoration, and achieve the effect of optimizing the earth's environment and improving thermal conductivity

Inactive Publication Date: 2007-02-28
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the vacuum heat insulating material of Patent Document 1 (Prior Art 1), since the grooves are formed on the side surface perpendicular to the thickness direction of the vacuum heat insulating material by compression molding, the vacuum is bent by the grooves that become thinner in the thickness direction. Insulation material, therefore, there is a problem that the thickness of the vacuum insulation material becomes thinner in the groove portion, and the heat insulation performance in the groove portion decreases
[0011] In addition, in the vacuum heat insulating material of Patent Document 4 (Prior Art 4), since ultra-fine inorganic fibers having a fiber diameter distribution peak of 0.1 μm to 1 μm are used, the productivity is low and the price is high for a single product. , while needing to overlap the fiber aggregates to obtain the thickness, resulting in an increase in the cost of the vacuum insulation material
In addition, as in Patent Document 4, in a vacuum insulation material in which a reinforcing material is added to one or both surfaces of an inorganic fiber aggregate, although the surface properties and rigidity can be improved, there is a problem that the reinforcing material does not affect the flexibility. And the reduction of thermal conductivity has a great influence, especially it is difficult to improve the thermal conductivity
Furthermore, in the vacuum heat insulating material of Patent Document 4, even if it is bent along the shape of the attached part, there is a problem that the shape returns to the original shape with the passage of time.

Method used

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  • Vacuum thermal insulating material and refrigerator using the same
  • Vacuum thermal insulating material and refrigerator using the same
  • Vacuum thermal insulating material and refrigerator using the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0056] A vacuum heat insulating material according to a first embodiment of the present invention and a refrigerator using the same will be described with reference to FIGS. 1 to 5 .

[0057] First, the whole of the refrigerator of this embodiment is demonstrated with reference to FIG. 1. FIG. Fig. 1 is a longitudinal sectional view showing a vacuum heat insulating material and a refrigerator using the same according to a first embodiment of the present invention.

[0058] The structure of the refrigerator has a box-shaped refrigerator box 20 and a door 6 that opens and closes the front of the box 20 of the refrigerator. The box body 20 of the refrigerator is composed of an outer box 23 stamped and formed from an iron plate, an inner box 21 vacuum-formed by ABS resin, and a vacuum insulation material 30 to be described later that is installed in the heat insulating wall formed by the outer box 23 and the inner box 21 through flanges. , 80 and a foam insulation material 22 suc...

experiment example 1

[0096]In Experimental Example 1, as the core material of the vacuum heat insulating material 40, an aluminum film having a size of 200 mm×200 mm and a thickness of 30 μm was sandwiched between glass wool not containing a binder having an average fiber diameter of 3 μm to 5 μm, Furthermore, an aging treatment was performed at 180° C. for 1 hour. Thereafter, the getter (molecular sieve 13× / activated carbon) of the adsorbed gas is packed into the outer cladding 41 with gas barrier properties, exhausted by the rotary pump of the vacuum packaging machine for 10 minutes, and then exhausted by the diffusion pump for 10 minutes, After the internal pressure of the vacuum heat insulating material reaches 1.3 Pa, the end portion of the outer cover 41 is sealed by heat sealing. Note that Experimental Examples 1 to 3 are specific forms to which the first embodiment is applied.

[0097] The thermal conductivity of the thus-obtained vacuum insulation material 40 was measured at 10° C. using...

experiment example 2

[0100] The vacuum heat insulating material 40 of Experimental Example 2 was produced in the same manner as in Experimental Example 1. The core material of the vacuum heat insulating material 40 as Experimental Example 2 was produced as follows. A polyethylene terephthalate film with a size of 200 mm x 200 mm and a thickness of 50 μm was sandwiched between an average fiber diameter of 3 μm to 5 μm that did not contain a binder. In the glass wool, and then at 180 ℃ for 1 hour of aging treatment. Thereafter, the getter (molecular sieve 13× / activated carbon) of the adsorbed gas is packed in the outer cladding 41 with gas barrier property, exhausted by the rotary pump of the vacuum packaging machine for 10 minutes, and then exhausted by the diffusion pump for 10 minutes, After the internal pressure of the vacuum heat insulating material reaches 1.3 Pa, the end portion of the outer cover 41 is sealed by heat sealing.

[0101] The vacuum heat insulating material 40 of Experimental E...

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PUM

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Abstract

The invention provides a vacuum heat insulating material which retains its shape deformed along a mounted part while securing heat insulating performance. The vacuum heat insulating material has a structure in which a core material (32) is vacuumed and sealed in a shell material (31) having gas barrier performance, the core material (32) is formed of a deformable fiber polymer and in the shell material, a deformation retaining member (33) is arranged which is deformable together with the core material and which can retain the shape of the core material after deformed. In addition, the core material clamped in glass wool which is free of caking agent and has an average fiber diameter of 3-5 mu m by the meshy or fibre-shape deformation retaining member (33) composed of organic compound, is putted into the shell material togather with a getter to perform vacuum sealing, thereby the vacuum heat insulating material is produced. With regard to a refrigerator, it can be obtained by inserting the vacuum heat insulating material into a refrigerator body, and then foaming filling a rigid polyurethane foam plastic (6) with high fluidity which comprises a mixed foaming agent of cyclopentane and water.

Description

technical field [0001] The present invention relates to a vacuum heat insulating material and a refrigerator using the same. Background technique [0002] As the vacuum heat insulating material of prior art 1, it is disclosed in Patent Document 1 - Japanese Patent Application Laid-Open No. 2001-336691. The vacuum heat insulating material described in this patent document 1 is a core material formed by laminating at least two layers of sheet-shaped molded objects composed of inorganic fibers with an average diameter of 1 μm or more and 5 μm or less, and covering the inside with a gas-barrier film. The pressed and sealed material is a material that can bend the vacuum heat insulating material by forming at least one or more grooves on the side surface perpendicular to the thickness direction of the vacuum heat insulating material by compression molding. [0003] In addition, as the vacuum heat insulating material of the prior art 2, it is also disclosed in Patent Document 2 -...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/06F25D23/06
Inventor 越后屋恒荒木邦成福田克美横仓久男中川路孝行
Owner HITACHI APPLIANCES INC