Abstract: A vacuum cleaner includes a housing that carries a suction inlet, a dirt collection vessel, a main filter compartment and a suction generator. The main filter is received in the main filter compartment. An airflow pathway connects the suction inlet, the dirt collection vessel, the main filter compartment and the suction generator. A dirt detection sensor is provided in the airflow pathway between the dirt collection vessel and the main filter compartment.

Abstract: A dirt cup for a vacuum cleaner includes a housing defining a dirt collection chamber, an inlet and an outlet in the housing in fluid communication with the dirt collection chamber and a filter holder on the housing external to the dirt collection chamber and downstream from the outlet. A vacuum cleaner incorporating the dirt cup is also provided.

Abstract: A vacuum cleaner includes a housing, a suction generator and a dirt collection assembly. The dirt collection assembly includes an inlet, an outlet and a concave air deflector. Air is delivered into a dirt collection chamber formed in the dirt collection assembly along a substantially parabolic trajectory.

Abstract: A vacuum cleaner includes a housing as well as a suction generator and bagless dirt system carried on the housing. The bagless dirt system includes a dirt cup, a prefilter, a filter chamber remote from the dirt cup, a filter in the filter chamber and a first conduit providing fluid communication between the dirt cup and the filter chamber. A second conduit provides fluid communication between the filter chamber and the suction generator.