The principle is as follows:
Use stainless steel, aluminum profiles, etc. as brackets, and seal with organic glass, mesh curtains and other materials to create a clean and airtight area, except for the door for people to enter and exit. , leaving only a certain gap at the bottom, and using FFU to blow air down from the top. The clean air filtered by the FFU presses down and overflows from the gap at the bottom, forming a positive-pressure clean space in the shed.
The other two types of laminar flow units are horizontal unidirectional flow and non-full unidirectional flow.