Vacuum degree detection operation

The quality of vacuum insulation board is determined by the vacuum leakage and insulation effect of the board. Based on the analysis of the internal air pressure of the vacuum insulation board, the internal vacuum degree of the vacuum insulation board is between1~10PaWhen the vacuum insulation plate is placed in the vacuum chamber, when the vacuum degree in the chamber is lower than the vacuum degree inside the vacuum insulation plate, the film material on the surface of the vacuum insulation plate will expand to a certain extent. According to this principle, after many tests, based on model calculation, the relationship between the expansion degree of the vacuum insulation plate and the vacuum degree, that is, the relationship between the expansion degree and the thermal conductivity (for the same film material and core material, the vacuum degree is positively related to the thermal conductivity)