Patent ID: 9015897
Filing Date: 2015-04-28
Classification: A47L

Abstract:
1. A dust detection system for a vacuum cleaner comprising a dirt separation chamber having an inlet for receiving a dust laden air stream, said dust separation chamber being adapted to provide a generally cyclonic airflow for separating dust from said dust laden air stream, and having an outlet arranged at a bottom of said dust separation chamber, said outlet being connected to a dustbin for collecting said separated dust, said dust detection system further comprising: an emitter positioned to emit an electromagnetic signal into said dust separation chamber during operation of the vacuum cleaner; and a receiver positioned to receive said electromagnetic signal; wherein said emitter and receiver are positioned in a bottom portion of said dust separation chamber and being arranged to detect dust accumulating at said bottom portion during operation of the vacuum cleaner, thereby providing an indication of said dustbin being full; and wherein said bottom portion extends from said bottom of the dust separation chamber to a height corresponding to an upper rim of said outlet.