Cyclone separating apparatus and vacuum cleaner having the same

A cyclone separating apparatus for use in a vacuum cleaner, comprising:

• a first cyclone for separating dust from dust-ladened air;
• a plurality of second cyclones for separating minute particles of dust from dust-ladened air by a second separation of dust from dust-ladened air with a centrifugal force;
• and
• an inlet-outlet cover disposed on an upper part of the first cyclone and the second cyclones, for a fluid-communication between the first cyclone and the second cyclones, the inlet-outlet cover through which purified air cleaned by the second cyclone, is discharged.
• wherein:
• the inlet-outlet cover comprises an air channel connected such that the whole of air discharged from the first cyclone flows into at least one of the plurality of second cyclones,
• wherein the inlet-outlet cover comprises a plurality of outlet channels penetrating into the inlet-outlet cover so air can be discharged from at least one of the plurality of second cyclones,
• the first cyclone includes at least a first outlet,
• at least one of the plurality of second cyclones includes at least a second outlet, and
• at least a portion of the plurality of outlet channels is inserted into the second outlet so that cleaned air is discharged through the plurality of outlet channels,
• wherein one end of the outlet channel is connected to the second outlet formed on one side of the at least one second cyclone, and the other end is open in an upward direction of the inlet-outlet cover, and
• the other end of the outlet channel is cut into a slope inclining toward a central direction of the inlet-outlet cover.