Design of negative pressure control system of airborne biological isolation cabin based on flow field simulation analysis method
GUO Lei
LI Falin
YONG Wei
ZHANG Muzhe
JIANG Lang
DU Haibo
XUE Bingjie
Abstract：Objective To put forward a key technology development strategy of negative pressure control system of large-scale airborne biological isolation cabin,so as to avoid the spread of pathogens in the process of air transport for patients with infectious diseases,ensure the safety and improve the efficiency.Methods By using the flow field simulation analysis method,the design variables of the negative pressure control system such as fan condition parameters and negative pressure differential parameters were simulated and verified,and the design and automatic control strategy of the negative pressure control system were proposed.Results The information of air circulation characteristics,wind speed parameters and differential pressure gradient in the cabin was obtained,and the feasibility of cabin air duct and fan parameters was verified,which provided technical support for the development of exhaust device and pressure difference automatic control device.Conclusion The established negative pressure control system can achieve the performance requirements of ventilation times ≥10 times/h and pressure difference-50 Pa,forming a good pressure gradient distribution,meeting the needs of biosafety protection,and reducing the test cost and development cycle.Based on the pressure difference control strategy,the automatic regulation function of air volume can meet the requirements of aviation environment under different flight conditions.
Keywords：simulation analysisairbornebiological isolationnegative pressure control
Publication Date：2025-01-27
Online Publishing Date：2026-08-26(First online date of this platform, not the publication date of the document)