Patent ID: 7857878

Claim:
A dust collection unit for a vacuum cleaner, comprising: a first chamber having a top and a bottom and a filter provided therein, the filter having a cylindrical shape with an opening in a middle and a plurality of holes formed on a surface of the filter, the first chamber further having an air guide provided near the top of the first chamber to guide the air introduced in a tangential direction along an inner surface of a wall of the first chamber such that the air spirally rotates in the first chamber and foreign objects of a first type in the air drops toward the bottom of the first chamber, and the air passes through the holes of the filter to flow through the opening in the middle of the filter; a second chamber having a top and a bottom, a portion of the wall of the first chamber being commonly shared by the second chamber; a bottom cover commonly shared by the first chamber and the second chamber, the bottom cover being pivotally connected to the wall for opening or closing both bottoms of the first and second chambers, wherein a first surface area of the bottom cover is used to cover the bottom of the first chamber and a second surface area of the bottom cover is used to cover the bottom of the second chamber, and the first surface area is larger than the second surface area; a first guide plate having an air intake tube provided on a portion of the first guide plate, which is provided over the top of the first chamber, and a plurality of air intake holes provided on another portion of the first guide plate, which is provided over the top of the second chamber, each of the plurality of air intake holes having a smaller diameter than the air intake tube and the air intake tube being aligned with the opening in the middle of the filter, a plurality of small cyclones aligned under the plurality of the air intake holes, a plurality of air intake guide members aligned over the plurality of air intake holes, and an airflow guide provided on the first guide plate and a portion of the air flow guide being provided immediately adjacent to a portion of the air intake tube, wherein the air flowing through the middle of the filter is guided through the air intake tube, the airflow guide directs the air towards the plurality of air intake holes and the plurality of air intake guide members guide the air into the plurality of cyclones such that the air spirally rotates and foreign objects of a second type in the air drop toward the bottom of the second chamber; a second guide plate provided over the first guide plate, the second guide plate having a plurality of openings and a first barrier to guide the flow of air, air flowing upwards from the plurality of small cyclones flow through the plurality of openings; and a top cover provided over the second guide plate, the top cover having an air exhaust guide on one side of the top cover, wherein the air flowing through the openings is directed by the first barrier to the air exhaust guide.