遮阳棚的本质，是一层安装在建筑外部的“节能皮肤”。它通过阻挡太阳辐射进入室内，从源头降低空调负荷，效果远比室内窗帘更直接。

The essence of a sunshade is an "energy-saving skin" installed on the exterior of a building. It reduces air conditioning load from the source by blocking solar radiation from entering the room, which is much more direct than indoor curtains.

遮阳效果有明确的量化标准。 根据设计规范，当室内外气温达到或超过29℃、太阳辐射强度大于240kcal/m?·h、阳光照射室内深度大于0.5m、照射时间超过1h时，就应考虑采取遮阳措施。遮阳棚能阻挡90%至100%的紫外线辐射，同时通过漫反射保持光线柔和。

The shading effect has clear quantitative standards. According to the design specifications, when the indoor and outdoor temperature reaches or exceeds 29 ℃ and the solar radiation intensity is greater than 240kcal/m? ·h. When the depth of sunlight exposure indoors is greater than 0.5m and the exposure time exceeds 1h, shading measures should be considered. Sunshades can block 90% to 100% of ultraviolet radiation while maintaining soft light through diffuse reflection.

材质和结构决定性能边界。 遮阳棚面料以亚克力、聚酯涂层织物和玻璃纤维涂层织物为主，亚克力面料可保证5年不褪色。支撑系统采用电机驱动铝合金卷管，支持0至130度角度调节，抗风等级可达8级。需要注意的是，遮阳棚适用于低层、多层建筑的门窗口外遮阳，不宜用在高层建筑外遮阳。

The material and structure determine the performance boundary. The sunshade fabric is mainly made of acrylic, polyester coated fabric, and fiberglass coated fabric. Acrylic fabric can guarantee no fading for 5 years. The support system adopts motor-driven aluminum alloy coils, supporting angle adjustment from 0 to 130 degrees, and the wind resistance level can reach level 8. It should be noted that sunshades are suitable for shading outside doors and windows of low rise and multi story buildings, and should not be used for shading outside high-rise buildings.

选购需关注三个核心指标。 首先是防晒性能，优先选择带防晒涂层的款式，关注UPF值；其次是防水能力，防水指数是重要参考；第三是抗风稳固性，支架应选择直径8mm以上的铝合金或玻璃纤维材质，确保交叉支撑和多拉绳点设计。对于多雨地区，防水性能应作为首要考量；对于强紫外线区域，防晒涂层则更为关键。

There are three core indicators to consider when making a purchase. Firstly, regarding sun protection performance, prioritize styles with sun protection coatings and pay attention to UPF values; Next is waterproof ability, and waterproof index is an important reference; The third is wind resistance stability. The bracket should be made of aluminum alloy or fiberglass material with a diameter of 8mm or more to ensure cross support and multi rope point design. For rainy areas, waterproof performance should be the primary consideration; For areas with strong ultraviolet radiation, sunscreen coating is more critical.

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