北京太阳能研究所研制成功一种保温窗帘,可以使室内具有冬暖夏凉的效果。这种窗帘是在化纤布上覆上铝箔,利用铝箔对光线反射率高、红外射线发射率低的特点,达到保温隔热的目的。据测定,光亮的铝表面可反射90％的光线,夏天就可把大部分阳光反射掉。另一方面,光亮的铝箔表面的红外射线不到10％,冬季可减少房间与 Beijing Solar Energy Research Institute has successfully developed a heat insulation curtain that can make indoor cool and cool in summer. This curtain is covered with aluminum foil on chemical fiber cloth, using aluminum foil for high reflectivity of light, low infrared ray emission characteristics, to achieve the purpose of thermal insulation. According to the measurement, the bright aluminum surface can reflect 90% of light, and most of the sunlight can be reflected in summer. On the other hand, less than 10% of infrared rays on the surface of bright aluminum foil can reduce the room temperature in winter