| As the international exchange is becoming increasingly frequent in 21st Century .Some infectious disease (such as SARS,H1N1,etc) transmitting by airborne or droplet-nuclei become more and more to bring to our lives a great threat. With the continuous improvement of medical conditions, hospital as a shelter, a place where the patients should constantly improve their own emergency infectious diseases and the ability to cut off from the source of transmission of infectious diseases, prevent infection and cross infection.How to establish reasonable and effective negative pressure isolation room, has become a universal concern. So far, Australia,the United States, Japan, Britain and other countries have made their negative pressure isolation room for the construction of guidelines, but has no uniform international design standards .However, air distribution and air changes, pressure, there are still no small controversy. Today, the growing tension in the energy, but also consider how to achieve the design energy consumption with a minimum design features to achieve negative pressure isolation room .In summary, we use SF6 as a tracer gas to study the influence of 8 kinds of air distribution and air changes on pollution diffusion in negative pressure isolation room .Several conclusions were made in the subject:(1)We found that vector-flow inlets can get a better indoor air distribution pattern, uniform and stable curve of its concentration of pollutants;(2)In this experiment, the top inlets with local top outlets and vector-flow inlets with local side outlets forms of air distribution in the two kinds of air pollutants concentration, self-purification time are better than six other forms of air distribution;(3)Top inlets with local top outlets and vector-flow inlets with local side outlets in 8 times of air changes can be used to replace the top inlet with bilateral air outlets in 12 times of air changes forms of air distribution to save energy. |
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