US Patent 9687127 Self-propelled vacuum cleaner

Provided is a self-propelled vacuum cleaner comprising: a housing that has an net formed on a lower surface and an exhaust port formed at one of left and right sides at a rear part and that can be self-propelled; and a dust-catching part provided between the inlet and the exhaust port through a ventilation path, wherein the dust-catching part includes a dust box disposed at the side of the net and an electrically powered fan disposed at the side of the exhaust port, the dust box and the electrically powered fan being configured to be separable.