Patent ID: 8701244

Claim:
A vacuum cleaner comprising: a body having a vacuum motor provided therein; a dust collection device provided in the body to collect dust; a dust compression device expandable or contractible selectively, to compress the dust collected in the dust collection device; a passage switching device configured to selectively communicate the dust compression device with a low pressure part having a lower pressure than a pressure of the dust collection device and a high pressure part having a higher pressure than a pressure of the dust collection device, wherein the passage switching device comprises, a chamber comprising a compression part passage in communication with the dust compression device; a low pressure part passage provided in the chamber, in communication with the low pressure part; a high pressure part passage provided in the chamber, in communication with the high pressure part; and a rotational member rotatably provided in the chamber, to communicate the compression part passage with either of the low pressure part passage or the high pressure part passage.