Patent ID: 7966692

Claim:
A multi-cyclone dust collector for a vacuum cleaner, comprising: a first cyclone unit causing dust-laden air sucked into a lower portion of the first cyclone unit to form a first upwardly whirling air current so as to separate contaminants from the dust-laden air by centrifugal force and to cause partially clean air, from which the contaminants are removed, to discharge downwards; and a second cyclone unit disposed under the first cyclone unit, the second cyclone unit causing the partially clean air, which is downwardly discharged from the first cyclone unit, to enter into a lower portion of the second cyclone unit, to form a second upwardly whirling air current so as to separate fine contaminants from the partially clean air by centrifugal force, and to cause clean air, from which the fine contaminants, are removed to discharge downwards, wherein the first cyclone unit comprises: a first cyclone body formed in a hollow cylindrical shape, for the dust-laden air to whirl inside the first cyclone body; an air communicating member formed in a hollow cylindrical shape, the air communicating member protruded upward from a center of a partition of the first cyclone body, the air communicating member discharging the partially clean air removed of contaminants to the second cyclone unit; a first dust chamber formed to wrap around the first cyclone body, the first dust chamber collecting contaminants discharged from the first cyclone body, the first dust chamber formed in a space between a sidewall of the first cyclone body and a first dust receptacle; and an air inlet pipe disposed at a lower portion of the first cyclone body, the air inlet pipe causing the dust-laden air to form the first upwardly whirling air current.