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Vacuum insulating material, hot water supplying device using the same and electric drive type hot water device

A technology of vacuum heat insulation materials and core materials, which is applied in heat exchange equipment, mechanical equipment, special materials for cooking utensils, etc., can solve the problems of poor airtightness and easy drop in airtightness, and achieve the purpose of inhibiting the entry of gas and moisture, High airtightness and the effect of suppressing the deterioration of thermal insulation performance

Inactive Publication Date: 2007-10-03
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] On the high temperature side, the effect of small holes in the aluminum foil is considered. On the low temperature side, the vapor-deposited aluminum layer has poor airtightness compared with the original aluminum foil, and the airtightness is easy to drop even in either structure.
In addition, although organic gas components are generated from adhesives, solvents, etc. from the laminated portion of the outer cover material 12 due to the influence of the high temperature side, these are not taken into consideration.

Method used

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  • Vacuum insulating material, hot water supplying device using the same and electric drive type hot water device
  • Vacuum insulating material, hot water supplying device using the same and electric drive type hot water device
  • Vacuum insulating material, hot water supplying device using the same and electric drive type hot water device

Examples

Experimental program
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Effect test

Embodiment 1

[0061] The first example is an example in which the film structure of the wrapping material 52 is formed as shown in FIG. 2 in the vacuum heat insulating material 50 shown in FIG. 1 . A binder-free glass wool laminate having an average fiber diameter of 4 μm was used as the core material 51 .

[0062] The specific structure of the covering material 52 of Example 1 is shown. Polyamide film (ONY) is used as the outermost surface protection layer 55, and polyethylene terephthalate (PET) is used as the resin film 56a for the first airtight layer 56 provided inside the surface protection layer 55. , and vapor-deposit aluminum with a thickness of 400-500 Ȧ as the metal vapor-deposition layer 56b. In addition, the second airtight layer 57 is an iron-mixed aluminum foil (AL) having a thickness of 6 μm. In addition, the aluminum vapor-deposited surface of the first airtight layer 56 and the aluminum foil of the second airtight layer 57 are bonded to face each other. An adhesive havi...

no. 2 Embodiment

[0077] In the second example, the vacuum heat insulating material 50 was produced under the same conditions as in the first example except that the adsorbent 53 was made of calcium oxide. Calcium oxide is a hydrophilic chemical adsorbent that absorbs water and becomes calcium hydroxide.

[0078] When the thermal conductivity indicating the thermal insulation performance of the vacuum heat insulating material 50 obtained in this way was measured in the same manner as in Example 1, the initial value was 0.0021 (W / m·K), which corresponds to the thermal conductivity after 5 years in this example. The rate value was 0.0068 (W / m·K), and it was confirmed that sufficient thermal insulation performance was maintained. In addition, the appearance of the vacuum heat insulating material 50 does not change in particular.

Embodiment 3

[0080] In the third embodiment, except that the hydrophobic synthetic zeolite with an average pore diameter of 6 Ȧ or more and the hydrophilic synthetic zeolite with an average pore diameter of 9 Ȧ are used together as the adsorbent 53, vacuum insulation is produced under the same conditions as in Example 1. Thermal Material 50. Hydrophobic synthetic zeolites are physical adsorbents, SiO 2 / Al 2 o 3 The ratio is 20 or more, and it is a high silica zeolite which is non-combustible.

[0081] When the thermal conductivity indicating the heat insulating performance of the thus obtained vacuum heat insulating material 50 was measured in the same manner as in Example 1, the initial value was 0.0022 (W / m·K). The rate value was 0.0059 (W / m·K). In addition, the appearance of the vacuum heat insulating material 50 does not change in particular.

[0082] In Example 3, by using a hydrophilic adsorbent and a hydrophobic adsorbent in combination, while the hydrophilic adsorbent prefere...

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Abstract

The present invention provides a vacuum heat insulation material capable of maintaining high heat insulation capacity even in high temperature circumstance, and provides a hot water supply device having high heat insulation capacity. In the vacuum heat insulation material comprising core material (51) composing of inorganic fiber polymer, a housing material (52) having surface protection layer and aerospace sealing layer and heat melting coating layer, and sorbent (53) absorbing the moisture and air component of core material (51) and the housing material (52), the heat insulation capacity can be maintained in long time in condition of high temperature by laminating the aerospace sealing layer of the housing material (52) with a first aerospace sealing layer and the second aerospace sealing layer in terms of opposite metal surface of at least tow layers of metal layer, and using resin film with melting point more than 150 DEG C as heat melting coating layer.

Description

technical field [0001] The present invention relates to a vacuum heat insulating material, a hot water supply device using the vacuum heat insulating material, and an electric hot water device. Background technique [0002] In recent years, from the viewpoint of global warming, the need to reduce power consumption has been demanded in household electrical appliances. For example, a refrigerator is a product that consumes electricity among home appliances, and reducing the electricity consumption of the refrigerator has become an indispensable situation as a countermeasure against global warming. Under such circumstances, refrigerators employing vacuum insulation materials have been commercialized to suppress unnecessary heat exchange with the outside and remarkably improve heat insulation efficiency. [0003] As the main application fields of existing vacuum insulation materials, refrigerators are the first, and products with lower temperature ranges such as ultra-low tempe...

Claims

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Application Information

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IPC IPC(8): F16L59/02F16L59/06A47J27/21A47J36/02
CPCB66C13/14B66C19/00
Inventor 越后屋恒荒木邦成福田克美鹤贺俊光嘉本大五郎
Owner HITACHI APPLIANCES INC
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