Accessories suitable for Cobos sweeping robot include filter element ECOCEN546Cr120CEN540Haipa. The filter element is a technical term with the function of filtration and purification. In order to purify the resources of the original fluid and separate them easily, there are mainly gas-liquid separation, solid-liquid separation, exhaust and dust filtration, and environmental protection. Now the filter elements are mainly divided into stainless steel filter elements, copper filter elements, titanium filter elements, Hastelloy filter elements, plastic filter elements and other materials.