Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means – Sandwich or hollow with sheet-like facing members
Patent
1998-04-17
2000-08-22
Chilcot, Richard
Static structures (e.g., buildings)
Composite prefabricated panel including adjunctive means
Sandwich or hollow with sheet-like facing members
428 34, E04C 234
Patent
active
061053368
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a heat-insulating multiple glazing and vacuum multiple glazing for use in a building construction or the like.
BACKGROUND ART
For constructions such as a house or a building, there is a need for saving energy consumption through improvement in the heating or cooling efficiency. As the efficiency of heating or cooling depends on the heat-insulating performance or air-tightness of the construction, heat-insulating wall materials and heat-insulating window glasses have been developed.
However, a heat-insulating window glass generally has a higher heat-through ratio than a heat-insulating wall material, hence a lower insulating performance. Accordingly, in order to achieve energy consumption saving, it is necessary to enhance the heat-insulating performance of the heat-insulating window glass. As a heat-insulating window glass having a higher heat-insulating performance, a multiple glazing is known. This multiple glazing is shown in FIG. 5.
FIG. 5 shows a cross-sectional construction of a conventional heat-insulating multiple glazing. This heat-insulating multiple glazing 100 includes two sheets of sheet glasses 101, 102 overlapped with each other with spacers 103 interposed therebetween sealing the peripheries of the plates and also with dry air being charged in the intermediate gap. This heat-insulating multiple glazing may achieve a heat-insulating performance equivalent to a heat-through ratio of 3.0-4.0 kcal/m.sup.2 hr.degree. C.
On the other hand, the heat-insulating wall material provides a heat-through ratio of 1/10 (0.3-0.4 kcal/m.sup.2 hr.degree. C.) of that of the heat-insulating multiple glazing 100. Accordingly, enhancement of the heat-insulating performance of the heat-insulating multiple glazing may lead to energy consumption saving. Following measures (a)-(d) are known for enhancing the heat-insulating performance of the heat-insulating multiple glazing 100. 101, 102 of the heat-insulating multiple glazing 100, so that the low-radiating films may reflect infrared beam, thereby improving the heat-insulating performance. rare gas so as to restrict convection between the sheet glasses 101, 102. As the rare gas, gas such as argon or krypton which hardly causes convection is employed, so that the convection between the sheet glasses 101, 102 may be appropriately restricted. number of the sheet glasses 101, 102 of the heat-insulating multiple glazing 100 or by increasing the gap between the sheet glasses 101, 102.
The heat-insulating performance may be enhanced by depressurizing the gap between the sheet glasses 101, 102 of the heat-insulating multiple glazing 100 thus restricting air convection.
However, in the case of (a), it is necessary for the low-radiating film to have light-through property so as to allow introduction of light into the indoor space. Then, in order to satisfy both of the low-radiating property and the light-through property, it is necessary to restrict the heat-through ratio of the heat-insulating multiple glazing 100 to about 1.0-1.5 kcal/m.sup.2 hr.degree. C. Hence, this value is still insufficient when compared with the heat-through ratio: 0.3-0.4 kcal/m.sup.2 hr.degree. C. of the heat-insulating wall material.
In the case of (b), in combination with the low-radiating film, the heat-through ratio of the heat-insulating multiple glazing 100 may be reduced to 1.0 kcal/m.sup.2 hr .degree. C. However, this is still insufficient when compared with the heat-through property: 0.3-0.4 kcal/m.sup.2 hr.degree. C. of the heat-insulating wall material.
In the case of (c), the heat-through ratio of the heat-insulating multiple glazing 100 may be reduced to 0.5 kcal/m.sup.2 hr.degree. C. However, the increase in the number of the sheet glasses 101, 102 will result in increase in the thickness of the heat-insulating multiple glazing 100. Then, the cost of the window frame for use with the heat-insulating multiple glazing 100 will increase. Further, the increase in the number of sheet glasses 101, 102 will result also in the cost of the h
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Katoh Hidemi
Misonou Masao
Chilcot Richard
Nippon Sheet Glass Co. Ltd.
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