For an air purifier design, Party A requires that the shell material is sheet metal for simple processing, and there can be no slightly complicated process such as stamping. The upper and lower shells are made of plastic, and the internal filter screen is a cylindrical universal filter screen. The existing sheet metal shells on the market are mostly cylindrical and square, and all the features are concentrated on the design of air outlets. I think about the shape of human lung organs and the net structure "Tyson Polygon" on the leaves of all green plants in nature ". Form a concept of "green, natural and healthy breathing. In order to ensure the integrity of the front panel, air intake on both sides is adopted, and a primary filter screen is installed on the air inlet.