This utility model provides an oil suction filter, including a housing and a filter
assembly disposed within the housing. The housing includes a bottom shell and a cover plate, the cover plate being a light-transmitting element and the bottom shell being a light-
absorbing element. The filter
assembly includes a filter screen frame and a filter screen disposed within the filter screen frame. The edges of the bottom shell and the cover plate are
laser-welded together to form a sealed connection along the edges, and the edges of the filter screen frame and the cover plate are
laser-welded together to form a sealed connection along the edges. In this utility model, the
laser-welded structure and double seals achieve good positioning and support, ensuring a tight fit between the cover plate, frame, and housing, effectively preventing dust and impurities from entering the filter interior.