ICESUN vacuum glass is sealed with the surrounding of two flat glasses, vacuum the gap and seal the exhaust hole. The gap between the two glasses is 0.2mm-0.4mm, and the vacuum degree can reach 10-4Pa. At the same time, Low-E low radiation glass is used to minimize the heat lost through the conduction, convection and radiation of vacuum glass. The working principle of vacuum glass is the same as that of glass thermos. At present, tempered vacuum glass has been successfully applied to the transformation of doors and windows of existing buildings (such as the transformation of the old house of Jiangsu Education Technology Building), bringing a low-carbon future to the transformation of existing buildings.
The national "14th five year plan" defines the transformation goal of old residential areas during the 14th Five Year Plan Period: to complete the transformation of 219000 old urban residential areas completed by the end of 2000. In 2021, it is planned to start the reconstruction of 53000 old communities. From January to November 2021, 54700 old urban communities were newly renovated in China, with an operating rate of 101.4%. Developing building energy conservation, especially promoting passive ultra-low energy consumption buildings, is an efficient means to reduce energy consumption in the operation stage of buildings and achieve the goal of carbon neutralization. China now has more than 60 billion square meters of existing buildings. If 50 billion square meters of buildings are transformed into passive ultra-low energy consumption buildings, the annual power consumption saved is equivalent to the power generation of more than ten Three Gorges projects, and its energy conservation and emission reduction effect is very obvious. Vacuum glass for doors and windows are energy-saving doors and windows composed of high-performance thermal insulation profiles and vacuum glass. Compared with ordinary hollow glass doors and windows, their thermal insulation and mute performance is very superior. They are the first choice for the transformation of doors and windows in passive ultra-low energy consumption buildings.