Dust collector and cleaner having the same

A vacuum cleaner, comprising:

• a cylindrical housing configured to form an outer appearance of the vacuum cleaner;
• a cyclone provided inside the housing and configured to generate a first swirling flow to separate dust from air introduced into the housing;
• axial inlet type cyclones configured to receive air and fine dust that have passed through the cyclone, and generate second swirling flows to separate the fine dust from the received air;
• and
• a mesh configured to surround the axial inlet type cyclones and to form a boundary between the cyclone and the axial inlet type cyclones,
• wherein
• the axial inlet type cyclones are positioned in four groups in four respective quadrants within the housing,
• ones of the axial inlet type cyclones included in one of the four groups positioned in one of the quadrants are oriented to face a first direction,
• ones of the axial inlet type cyclones included in other ones of the groups that are positioned in other ones of the quadrants are oriented to face other directions that differ from the first direction,
• a first dust collection chamber is formed in a ring shape inside the housing and formed to collect the dust from the cyclone,
• a second dust collection chamber is formed in a region surrounded by the first dust collection chamber, and is configured to collect the fine dust from the axial inlet type cyclones,
• a second dust collection chamber top cover is provided below the axial inlet type cyclones to partition an inlet side of the axial inlet type cyclones and the second dust collection chamber so as to prevent scattering of fine dust collected in the second dust collection chamber, and
• four holes for the fine dust discharged from the axial inlet type cyclones are formed in the second dust collection chamber top cover, and the four holes are formed, respectively, in the four quadrants.