Characteristics of traffic flow and outdoor air requirement in hospital wards

Puts forward the two characteristic parameters which influence outdoor air supply of hospital wards, i.e. the number of occupants and the indoor residence time of person. Combining with the survey data, provides the characteristics for the number of occupants and the residence time in different departments. Gives the two outdoor air supply parameters, i.e. impact resistance strength and impact resistance time. Establishes the outdoor air control criterion on the basis of the parameters. According to the analysis of the case, considers that the outdoor air change rate for outdoor air design of the wards should be greater than 2 h^-1. And presents the corresponding control strategy.