Multi-cyclone dust separating apparatus of vacuum cleaner

A multi-cyclone dust separating apparatus, comprising:

• a first cyclone unit including a first outer tub with a first air inlet and a cylindrical element with a first air outlet, and whirling air from the first air inlet to separate dust from the air to effect a first separation of dust from air, the cylindrical element being disposed in the first outer tub to form a first cyclone chamber, which is a space for whirling the air, along with the first outer tub;
• a second cyclone unit including a plurality of cyclones, each of which have a second air inlet for drawing in the air from which the dust is separated in the first cyclone chamber, to effect a second separation of dust from the air;
• and
• a dust bin including a first dust collecting chamber for collecting the dust separated by the first cyclone unit and a plurality of second dust collecting chambers for collecting the dust separated by the second cyclone unit,
• wherein the second cyclone unit is disposed completely within the cylindrical element of the first cyclone unit and the plurality of second dust collecting chambers of the dust bin is separately formed and connected with the corresponding cyclones of the second cyclone unit, respectively.