Influence of air supply and exhaust outlet setting on control of air route infection in wards

The relative position and number of air supply and exhaust outlets have significant influences on air distribution and pollutant transmission in wards. In order to reduce the cross-infection rate of respiratory infectious diseases in wards, an optimization scheme for the setting of air supply and exhaust outlets is put forward. The air exhaust outlet is set up near each hospital bed. By increasing the number of air exhaust outlets and adjusting the position of air supply outlets, the air supply and exhaust paths are “parallel” relative to the hospital bed. Taking a typical double ward as an example, through the simulation and calculation of air distribution, the optimization scheme is compared with the scheme that meets the requirements of the relevant guideline. The results show that the optimization scheme significantly improves the indoor air distribution and reduces the concentration of pathogenic bacteria in wards.