Cyclone separating apparatus and a vacuum cleaner having the same

A vacuum cleaner comprising:

• a cleaner body having a driving motor;
• a suction brush connected to the cleaner body to draw in dust on a surface being cleaned;
• and
• a cyclone separating apparatus detachably mounted to the cleaner body to separate the dust from dust-laden air drawn in through the suction brush, and
• wherein the cyclone separating apparatus comprises a cyclone body including a cyclone chamber and a dust collecting chamber, a cover unit connected to an upper portion of the cyclone body, a door unit openably mounted to a bottom portion of the cyclone body, and at least one noise reducing rib formed in an air discharging pipe in the cyclone chamber, wherein the at least one noise reducing rib is formed on the inner wall of the air discharging pipe from a certain depth from a top of the air discharging pipe and formed in a certain length toward the center of the air discharging pipe so as not to reach the center of the air discharging pipe.

A cyclone separating apparatus comprising:

• a cyclone chamber;
• an air entry path for introducing dust-laden air to the cyclone chamber, the cyclone chamber inducing a rotating current to the dust-laden air to separate the dust-laden air into cleaned air and dust;
• an air discharging pipe defining a discharge path for discharging the cleaned air from the cyclone chamber;
• and
• a noise reducing rib formed on the air discharging pipe in the air discharge path, the noise reducing rib being sufficient to prevent the cleaned air from becoming a whirling air current in the air discharging pipe, wherein the noise reducing rib has a width that is less than a radius of the air discharging pine.