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Heat-insulating housings and preparation method thereof

A technology of a thermal insulation box and a manufacturing method, which are applied in the field of thermal insulation boxes and their manufacturing, can solve the problems of poor outer box, deformation, bad local deformation of rigid polyurethane foam outer box, etc., and achieve the effect of restraining the usage amount.

Active Publication Date: 2007-10-24
日立グローバルライフソリューションズ株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, it is conceivable that the rapid change in the thermal insulation thickness of the rigid polyurethane foam at the location where the vacuum insulation panel is mounted causes the following problems, that is, shrinkage of the rigid polyurethane foam and the adhesion of the rigid polyurethane foam to it. Undesirable local deformation of the outer box, or the occurrence of a local unfilled portion of the rigid polyurethane foam caused by the obstruction of the flow by the rigid polyurethane foam and the accompanying decline in its thermal insulation performance, or due to the rigid Unfavorable local deformation of the outer box caused by the occurrence of surface voids caused by the irregular flow of polyurethane foam, etc.

Method used

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  • Heat-insulating housings and preparation method thereof
  • Heat-insulating housings and preparation method thereof
  • Heat-insulating housings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 in Table 1 is an example in which the thickness t of the vacuum insulation panel 12 is set to 5 mm, and the flow thickness T of the rigid polyurethane foam 11 is set to 10 mm (T=2t). In this Example 1, when the rigid polyurethane foam 11 is foamed, no unfilled voids are generated near the corresponding portion, and the thermal conductivity is 18.7 mW / m·K, subtracting the central portion from the overall density The numerical value of the density is 3.2, and the rigid polyurethane foam 11 itself is a numerical value not greatly different from that of Conventional Example 1. It is considered that the flow of the rigid polyurethane foam 11 proceeds smoothly, and the material properties inherent in the rigid polyurethane foam 11 are obtained.

Embodiment 2

[0046] Example 2 in Table 1 is an example in which the thickness t of the vacuum insulation panel 12 is set to 5 mm, and the flow thickness T of the rigid polyurethane foam 11 is set to 15 mm (T>2t). In this Example 2, when the rigid polyurethane foam 11 is foamed, no unfilled voids are generated near the corresponding portion, and the thermal conductivity is 18.5 mW / m·K, subtracting the central portion from the overall density The numerical value of the density was 3.4, which was a numerical value not significantly different from Conventional Example 1. This is considered to allow the flow of the rigid polyurethane foam 11 to proceed smoothly, and to obtain the material properties inherent in the actual rigid polyurethane foam 11 .

Embodiment 3

[0050] Example 3 in Table 1 is an example in which the thickness t of the vacuum insulation panel 12 is set to 10 mm, and the flow thickness T of the rigid polyurethane foam 11 is set to 20 mm (T=2t). In this Example 3, when the rigid polyurethane foam 11 is foamed, no unfilled voids are generated near the corresponding portion, and the thermal conductivity is 18.6 mW / m·K, subtracting the central portion from the overall density The numerical value of the density is 3.5, and the rigid polyurethane foam 11 itself is a numerical value not significantly different from that of Conventional Example 1. It is considered that the flow of the rigid polyurethane foam 11 proceeds smoothly, and the material properties inherent in the rigid polyurethane foam 11 are obtained.

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Abstract

The purpose of the present invention exists in, ensure the favorable external appearance and no unfilled space cavity in the heat-insulated box body to exert the heat insulation character of the vacuum thermal insulated plate. The heat-insulated box body (7) is arranged with vacuum thermal insulated plate (12) in the space of the box body (7A) which is formed by the external box (13) and the inner box (14), and is filled with hard polyurethane foam (11). The heat-insulated box body uses the combined aerating power which is combined with 1.5 to 1.8 weight-share of water and 13 to 15 weight-share of cyclopentane in the 100 weight-share composed of relative energizing agent, lather booster and polyol combination, makes it become the hard polyurethane foam reacted from the polyatomic alcohol component which comprises more than 40 percent of the mixture whose solubility is low in the cyclopentane, make the flowing thickness of the polyurethane on the vacuum thermal insulated plate to more than two times of the thickness of the vacuum thermal insulated plate, arrange the vacuum thermal insulated plate above the position which is 20 mm distance to the injection port (6), fill in the hard polyurethane foam.

Description

technical field [0001] The invention relates to a heat-insulating box body and a manufacturing method thereof, and is especially suitable for the heat-insulating box body used in refrigerators, cold stores, refrigerated display cabinets, automatic vending machines, and the like. Background technique [0002] In recent years, energy saving has been strongly desired from the viewpoint of preventing global warming, and energy saving has become an issue in any field. From the viewpoint of effective use of heat, heat-insulating boxes with excellent heat-insulating performance are required. [0003] Therefore, a heat insulating box using a rigid polyurethane foam and a vacuum insulation panel with a low thermal conductivity as a heat insulating layer has been proposed, for example, Japanese Patent Laid-Open No. 2000-283385 (Patent Document 1), Japanese Patent Laid-Open No. 2001-99392 (Patent Document 2) and the proposal of the heat-insulating box described in Japanese Unexamined P...

Claims

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Application Information

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IPC IPC(8): F16L59/02F16L59/06B29C39/10F25D23/06
CPCB29C44/18B29K2075/00B29C44/12F16L59/065F25D23/064F25D23/08F25D2201/126F25D2201/14Y02B40/00
Inventor 井关崇荒木邦成鹤贺俊光福田克美
Owner 日立グローバルライフソリューションズ株式会社
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