초록 ▼

An apparatus for filtering a dirty air stream in a vacuum cleaner to obtain a clean air stream includes subjecting the dirty air stream to a first cyclonic separation stage to obtain a partially cleaned air stream and subjecting the partially cleaned air stream to an electronic filtration stage and

An apparatus for filtering a dirty air stream in a vacuum cleaner to obtain a clean air stream includes subjecting the dirty air stream to a first cyclonic separation stage to obtain a partially cleaned air stream and subjecting the partially cleaned air stream to an electronic filtration stage and optionally a second cyclonic separation stage to obtain the clean air stream. The electronic filtration stage is optionally removable with a cyclonic cleaning stage from the vacuum cleaner. The electronic filtration stage is optionally an electrostatic precipitator which utilizes air flow through the vacuum cleaner to generate the voltage used by the electrostatic precipitator.

대표청구항 ▼

1. A vacuum cleaner comprising:(a) a dirty air inlet for receiving air containing dirt; (b) a clean air outlet spaced for the dirty air inlet; (c) an air flow path extending downstream from the dirty air inlet to the clean air outlet; and, (d) a filtration assembly positioned in the air flow path, t

1. A vacuum cleaner comprising:(a) a dirty air inlet for receiving air containing dirt; (b) a clean air outlet spaced for the dirty air inlet; (c) an air flow path extending downstream from the dirty air inlet to the clean air outlet; and, (d) a filtration assembly positioned in the air flow path, the filtration assembly comprising: (i) at least one cyclonic cleaning stage in flow communication with the dirty air inlet and having a partially cleaned air outlet; and, (ii)at least one electrostatic precipitator positioned in the air flow path downstream from the at least one cyclonic cleaning stage and upstream of the clean air outlet; and, (e) a battery for operating the vacuum cleaner including producing a high voltage potential which is used by the electrostatic precipitator wherein the high voltage potential is produced in response to air flow through the vacuum cleaner.