Commonly used factory workshop purification equipment can be divided into the following categories. 1. Air shower room and cargo shower room. It can remove dust and other pollutant particles from the surfaces of people and objects, and also serves as a buffer between clean areas and non-clean areas. 2. Transfer window. It is mainly used for the transfer of small goods between clean workshops in factories, which can reduce the number of openings of clean workshop doors and reduce pollution in clean areas. 3. Clean workbench. The clean workbench in the workshop can provide high cleanliness for local purification on the workbench to meet production needs.