Sash with Segmented Glass and Spacer Insulation
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Solution Overview
Problem
Conventional sash fittings with multi-layered glass materials face challenges in enhancing heat insulating properties due to heat bridges formed by rail and stile members, which also increase the sash's thickness dimension, making it difficult to improve insulation without expanding the sash's dimensions.
Innovation Solution
The sash design incorporates a configuration where the rail and stile members are bonded to the surface of a first planar material with heat-insulating spaces between it and a third planar material, reducing heat transfer and maintaining the sash's thickness by using a spacer member to create a heat-insulating space between the first and third planar materials, particularly at the head end and peripheral ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If rail and stile members are provided on the surface of multi-layered glass, then heat insulating properties are improved, but the dimension of the sash along the thickness direction increases significantly
Solution Approach 1:
The planar material is divided into multiple glass layers (first, second, and third glass) with heat-insulating spaces between them. The rail and stile members are segmented in their positioning, with some members on the first glass and others on the third glass, creating separate thermal zones that reduce overall heat transfer while maintaining compact thickness.
Solution Approach 2:
The heat-insulating spaces are nested between the multiple glass layers, with the first heat-insulating space between the first and second glass, and the second heat-insulating space between the second and third glass. This nested structure provides thermal insulation without significantly increasing the overall sash thickness.
2Loss of energy
If glass pane covers the thickness-direction-facing surface of rail and stile members, then heat bridges are reduced, but the effect is not enough to improve heat insulating properties
Solution Approach 1:
The insulation system is segmented into multiple glass layers with intermediate spaces, creating multiple thermal barriers rather than relying on a single glass pane. This segmentation multiplies the insulating effect and reduces heat bridge formation more effectively.
Solution Approach 2:
Heat-insulating spaces act as intermediary layers between the glass layers and rail/stile members, providing additional thermal resistance. These intermediary spaces break the direct thermal path that would otherwise exist between the indoor and outdoor environments.
3Loss of energy
If rail and stile members are provided on the indoor side surface, then heat insulating properties improve, but the sash dimension along thickness direction increases
Solution Approach 1:
Instead of positioning all rail and stile members on a single surface (indoor side), the invention distributes them across different layers in the thickness dimension. Some members are on the first glass layer, others on the third glass layer, utilizing the third dimension to optimize both insulation and compactness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces heat transfer through the rail and stile members, enhancing heat insulating properties while minimizing the increase in sash thickness, thus improving energy efficiency without increasing the sash's dimensions.
Implementation Method 1
a heat-insulating space held between the first planar material and the third planar material by interposing a spacer member
Data Source
Figure 1
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AI summary
A sash and a fitting using the sash include first and second fixed glass plates 211 and 212 that are bonded to each other with a heat-insulating space 215 held therebetween by interposing a spacer member 214 between peripheral ends of the first and the second glass plates 211 and 212, and a third fixed glass plate 213 that has a rectangular shape having smaller outside dimensions than those of the first fixed glass plate 211, and is bonded to the first fixed glass plate 211 with a heat-insulating space 217 held between the third fixed glass plate 213 and the first fixed glass plate 211 by interposing a spacer member 216 at peripheral ends of the third fixed glass plate 213 with an end face on the tail end side thereof lying on the same plane as that of the first fixed glass plate 211. Rail and stile members 22, 23, and 24 are bonded to a surface of the first fixed glass plate 211 at peripheral ends where end faces of the first fixed glass plate 211 project more than end faces of the third fixed glass plate 213. A stile member 25 is bonded to a surface of the third fixed glass plate 213 at a peripheral end where an end face of the first fixed glass plate 211 aligns with an end face of the third fixed glass plate 213.