Vacuum glass is to seal the periphery of two pieces of flat glass, vacuum the gap and seal the exhaust hole. The gap between the two pieces of glass is 0.3mm, and generally at least one piece of vacuum glass is low-emissivity glass.
In this way, the heat loss of conduction, convection and radiation of vacuum glass is minimized, and its working principle is the same as that of glass thermos.
Advantages of vacuum glass:
Vacuum glass relies on the special structure of vacuum layer to effectively block indoor and outdoor heat conduction. The heat transfer coefficient u is below 0.6Wm-2k- 1, and can be as low as 0.3w/(m k), which is close to the wall. It can significantly reduce the power consumption of air conditioners, the emission of pollutants and greenhouse gases, and reduce environmental pollution.
Choosing vacuum glass with appropriate shading coefficient can effectively control the solar heat gain and keep the room cool in summer. When the outdoor temperature is -20℃ in winter, the inner surface temperature of vacuum glass is only 3-5℃ lower than the indoor air temperature, which can keep the room warm and comfortable.
With the increase of urban population density and transportation, noise pollution is becoming more and more serious, which directly harms people. The vacuum layer of vacuum glass can effectively block the transmission of sound, especially in the middle and low frequencies with strong penetration.