Application of air tightness standards for multi-blade exhaust smoke outlets/air inlets

Viewing at the fact that the air tightness standards for multi-blade exhaust smoke outlets/ air inlets are merely an integrated control index reflecting the leakage of closed opening from a macro perspective, therefore they can not directly be used for leakage calculation of pressurization air supply system, suggests the air tightness standards to be converted into two alternative parameters indicating the function relationship between leakage and pressure difference—air leakage area ratio of air opening and pressure difference index, and sets up the mathematical model of them. Simulates the conversion of some domestic and international air tightness standards for air opening, providing a reference for leakage calculation of closed openings.