The filter element of the air purifier should be equipped with a filter at the return air outlet

The filter element of the air purifier should be equipped with a filter at the return air outlet. If indoor pressure permits, a medium effect filter should be installed at the return air outlet. Due to the personnel operation in the clean operating room and the cleaning work before and after surgery, the return air may contain more hair and textile fibers, etc., which are especially easy to deposit on the pipeline through the return air pipeline, causing dust accumulation bacteria; Or deposited on the coil, affecting the heat transfer efficiency, even blockage, reduce air volume. The positive pressure can also be easily established by setting a filter at the return air outlet. In the high school primary school range in our country, there are few kinds of filter material and filter. The medium effect filter set in the air conditioning box is mostly low filtration performance, which can not effectively protect the terminal high efficiency filter, affecting its service life. Although the main performance of the end filter used in the clean operating room is efficiency, its other performance will also affect the degree of sterility of the indoor environment, which should also be carefully selected. Under normal conditions, the filter will not be infected with bacteria. In order to eliminate the possibility of bacterial growth, the material used in the filter should be hydrophobic and organic materials should not be used, such as the frame of plywood or wood filter; If the end filter device uses a separator filter, the separator should be excluded from kraft paper or coated paper products, the use of aluminum separator is better; If the end filter device adopts no separator filter, it is not suitable to use the products directly with cotton thread as the separator. In addition to the use of filtration devices