Control method of automatic control system in high-level biosafety laboratories

Presents the automatic control system requirements in high-level biosafety laboratories. Studies the pressure control method through analysis of the air control valve of the core workshop, chemical shower room and protective clothing replacement room. Analyses the fan switching process in the case of ventilation and air conditioning failure. Concludes that the control method can ensure the stability of laboratory pressure and orderly pressure gradient under the conditions of normal operation and failure. Emphasizes the importance of automatic control system to safety of human and environment.