Abstract:
A method for treating a liquid (e.g. water) with a gas (e.g. air) containing ozone includes passing air through an corona discharge ozone generator to produce air containing ozone and introducing the air containing ozone into the liquid; and, periodically de-energizing the ozone generator and passing air through the ozone generator.
Abstract:
A vacuum cleaner is reconfigurable between at least two positions. The vacuum cleaner has at least one motor and fan assembly for receiving power and producing airflow during use of the vacuum cleaner. The vacuum cleaner also has at least one sensor adapted to sense a change in the position of the vacuum cleaner and to alter the power provided to the at least one motor and fan assembly in response thereto.
Abstract:
A vacuum cleaner has a first and second cyclonic cleaning stages in series. The second cyclonic cleaning stage has a plurality of second stage cyclones. A conduit connects the first cyclonic cleaning stage outlet and the second stage cyclone inlets.