In principle, vacuum glass can be compared to a flat-plate thermos bottle. The same point is that the interlayer of two layers of glass is a vacuum with a pressure lower than 10-1pa, so that the heat transfer of the gas is negligible; both inner walls are plated with low The radiation film keeps the radiation heat transfer as small as possible. The difference between the two: First, the vacuum glass used for doors and windows must be transparent or light-transmissive, can not be coated with opaque silver film like a thermos bottle, plated with different types of transparent low-radiation film; second, from the cylinder with balanced pressure resistance Or the spherical thermos becomes a flat plate, and a "support" square must be placed between the two layers of glass to withstand an atmospheric pressure of about 10 tons per square meter to keep the gap between the glass to form a vacuum layer.
The "support" square array spacing is designed according to the thickness of the glass plate and the mechanical parameters, between 20mm-40mm. In order to reduce the heat transfer formed by the "heat bridge" of the support and make it difficult for the human eye to distinguish, the diameter of the support is small, and the diameter of the support in the current product is between 0.3 mm and 0.5 mm, and the height is between 0.1 mm and 0.2 mm. between. A better function of vacuum glass is sound insulation. Because of the vacuum layer, it is impossible to conduct noise, so vacuum glass can isolate 90% of the noise.
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