“中空玻璃遮阳百叶问答篇（一）”

Built-in Sunshade Louvered Insulating Glass FAQs About Built-in Sunshade Louvered Insulating Glass: Ten FAQs (Part 1)

1. Why is the adjustable sunshade a prerequisite and measure for the heat-insulating function of doors and windows?

Adjustable sunshade can block sunlight from entering the room by adjusting the angle and position of the sunshade device when the sun's radiation is strong, significantly reducing the solar radiation heat transmitted through the glass. For example, during the midday sun in summer, the adjustable sunshade can block most of the heat outside, making the indoor temperature significantly lower than that without sunshade. Sun radiation heat passing through Low-e insulating glass into the room generates far-infrared rays, causing a high-temperature polymerization effect inside, which can exacerbate the load on air conditioning, increase energy consumption, and contribute to the heat conduction and greenhouse effect of the community and the environment, affecting health and damaging the environment.

Adjustable sunshade can be adjusted according to different seasons, times, and weather conditions. In winter when the sun is weak, the sunshade can be retracted to allow sunlight to enter the room to obtain heat; in summer when it is hot, the sunshade can be extended to block or adjust the light entering the room to form a high-temperature aggregation effect. In contrast, fixed sunshade cannot adapt to environmental changes so flexibly, so adjustable sunshade has a significant advantage in regulating heat insulation effects. It can easily achieve summer sunshade heat insulation and winter heating and insulation functions.

Adjustable sunshade can form an integrated heat insulation system with doors, windows, and transparent glass curtain walls. It is compatible with the sealing performance of doors and windows. While blocking solar radiation heat from entering the room and forming heat aggregation, it also reduces the heat transfer caused by air infiltration, further improving the heat insulation performance of doors, windows, and transparent glass curtain walls. For example, the adjustable sunshade louvered insulating glass is tightly integrated with the frame of doors, windows, and curtain walls, blocking the sunshade while also playing a sealing role around the缝隙, preventing heat from entering through the gaps. This can greatly reduce the air conditioning usage rate by more than 60%, saving electricity and reducing the continuous emission of high-temperature gases by air conditioning outdoor units to the outside, greatly reducing the heat conduction of the community and the formation of the city's furnace effect.

2. Why is Low-e insulating glass only suitable for winter heating and insulation, not for summer sunshade and heat insulation? What are the hazards of Low-e glass in summer? Why is it better to use high-transmittance and low-reflection coated film products, and what are the advantages?

Low-e insulating glass in winter heating and insulation characteristics: Low-e insulating glass cannot block sunlight and near-infrared rays from entering the room to produce high-temperature aggregation, but can reflect the long-wave heat radiation emitted by indoor objects back to the room, reducing the heat loss through the glass to the outside, significantly increasing the indoor temperature. Therefore, it is suitable for cold regions and winter heating and insulation of buildings.

Limitations of Low-e glass in summer sunshade and heat insulation: Low-e glass mainly reflects indoor heat radiation to insulate, and its blocking ability to outdoor solar radiation heat is relatively limited. Its reflectivity design focuses more on saving indoor heat, rather than sunshade products or built-in sunshade insulating glass products that effectively block near-infrared lines and solar light radiation in the solar spectrum. Therefore, the ability of Low-e insulating glass to achieve sunshade and heat insulation in summer is far inferior to that of adjustable sunshade products or sunshade insulating glass.

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