Abstract: A dust-collecting box includes a dust-collecting box body and a filter screen. The dust-collecting box body defines a dust inlet, a dust receiving cavity and an exhaust passage which are communicated in sequence, an air inlet end of the exhaust passage is in communication with the dust receiving cavity, and an air outlet end of the exhaust passage is in pneumatic communication with a fan assembly. The filter screen is arranged between the air inlet end and the air outlet end, the filter screen filters an airflow entering the exhaust passage from the dust receiving cavity, an exhaust direction of the air outlet end is defined as a preset reference direction, and the filter screen is arranged obliquely relative to the preset reference direction.

Abstract: A debris bin includes a box body, a debris suction opening, and a debris outlet opening. The box body has an inner cavity. The debris suction opening is defined on the box body and communicates with the inner cavity of the box body. The debris outlet opening is defined on the box body and communicates with the inner cavity of the box body. The inner cavity is provided with a supporting surface for supporting debris. The supporting surface is inclined, and a top edge of the supporting surface and a bottom edge of the supporting surface are arranged parallel to each other and horizontally. The debris outlet opening is located at a side of the bottom edge of the supporting surface.