Design and construction method of ventilation system of sanitary passing area of container type lazaretto ward

The invention discloses a design and construction method of a ventilation system of a sanitary passing area of a container type infectious ward, and belongs to the technical field of constructional engineering. According to the design method, standardized design is carried out by using BIM software; comprising the steps of modeling, calculating the air volume, adjusting the size of an air opening, the sectional area of an air pipe, the models of a check valve, a silencer, a filter, an air cap and a fan and the arrangement position of the fan, setting the size of the fan and the size and position of a fan foundation, marking an air pipe wall penetrating plate hole, setting the installation position of an air pipe hanging support and the like. According to the ventilation system, BIM software is used for overall design of the ventilation system, then reasonable sub-item construction is conducted through different manufacturers, and then final assembly is conducted, so that rapid design and construction of venti