The so-called negative pressure ward refers to a special device where the air pressure inside the ward is lower than the air pressure outside the ward. In this way, from the perspective of air circulation, only fresh air from outside can flow into the ward, and the air contaminated by patients inside the ward will not leak out, but will be discharged to a fixed place through a dedicated channel in a timely manner. In this way, the area outside the ward will not be contaminated, thereby reducing the chance of medical staff being heavily infectedRescue respiratory systems like SARSinfectious disease病人。

The infectious disease negative pressure isolation ward uses one set of air supply purification device and two sets of exhaust purification device. The air purification device consists of an air supply cabinet and primary, medium, and high-efficiency filtration devices, with a filtration efficiency of 99.99%. (Particle size ≥ 0.3 μ m). The exhaust purification device consists of an exhaust cabinet and coarse and medium efficiency filtration devices, with a filtration efficiency of 99.99% (particle size ≥ 0.3 μ m).