Patent ID: 7332008

Claim:
A cyclone dust-collecting apparatus comprising: a suction air inlet; a first dust-collecting chamber for collecting relatively large dust particles from dust-laden air drawn in through the suction air inlet; a second dust-collecting chamber for collecting relatively small dust particles from the air having passed through the first dust-collecting chamber; a cyclone generation portion is formed to extend across the first and the second dust collecting chambers to provide fluid communication there between, wherein the cyclone generation portion is substantially defined by a cylinder having a cyclone air inlet formed at one end and which extends into the first dust-collecting chamber, the cylinder having an air outlet at the other end thereof, said cylinder extending into the second dust-collecting chamber, the cyclone generating ends having essentially the same diameter; a dust separation assembly is formed in the cyclone generation portion shaped and configured to collide with the dust drawn in through the suction air inlet and to form a cyclone air stream in the second dust-collecting chamber; and a discharge pipe disposed in the cyclone generation portion spaced apart from the dust separation assembly.