Filtering module

A filtering module, comprising:

• a first reinforced aluminum side plate surrounding to form a first rectangular frame, the first reinforced aluminum side plate comprising a first top plate, a first connecting plate, a base plate and a first positioning plate, the first connecting plate connecting between the first top plate and the base plate, the base plate and the first top plate being substantially parallel with each other, the base plate having a treated surface away from the first top plate and configured to abut against a fan filtering unit, the first top plate having a first supporting surface away from the base plate, the first positioning plate being disposed perpendicularly on the first supporting surface, the first positioning plate and the first connecting plate being located at opposite sides of the first top plate, the first positioning plate aligning with the first connecting plate;
• and
• at least one first filtering mesh at least partially supported on the first supporting surface and at least partially abutting against the first positioning plate.