Analysis of the Flow Field Testing under Operating Room's Sliding Door Opening Conditions
In general,the air pressure between indoors and outdoors is typically about 20Pa,aiming to prevent the infiltration of contaminated air and reduce the risk of wound infection.However,the pressure difference between indoors and outdoors disappears during human movement,compromising the sealing of the operating room.The processes of door opening and human entering can cause additional disturbance to the air exchange at the doorway.This study employed ultrasonic three-dimensional anemometry to measure the instantaneous airflow at the doorway during human movement.The results indicate that the process of door opening can cause the ambient air to enter the operating room,even with the measures that keep the initial positive pressure of 20Pa with a sliding door and reduce the exhaust air volume by 50%.Furthermore,the ambient contaminated air can still intrude into the operating room when humans enter or leave.Compared with the condition without humans entering or leaving the operating room,the air volume entering the operating room increased by 83.8%(about 0.269m3),and the air leaving the operating room increased by 13.6%(about 0.424m3).This study provides guidance for the design of the ventilation system in the operating room.
Operating roomsDoor opening and closing processIndoor-to-outdoor air exchange ratePiston airflow
万方数据
维普
