Cleaner

A cleaner comprising:

• a main body;
• a connection pipe having one end connectible to the main body and an other end;
• and
• a brush head connectible to the other end of the connection pipe;
• wherein the brush head comprises:
• a first cover to cover one side of the brush head, the first cover having an inlet;
• a second cover to cover an other side of the brush head, the second cover having an outlet duct;
• a drum brush configured to catch a foreign material from a floor by rotating;
• a suction inlet configured to move the foreign material to the main body through the connection pipe;
• a driver disposed inside of the drum brush, and configured to rotate the drum brush, the driver having:
• one end connected to the inlet of the first cover so that outside air of the brush head directly enters into the driver through the inlet of the first cover;
• an other end;
• and
• a plurality of exhaust holes through which air inside of the driver discharges into the inside of the drum brush;
• an impeller disposed inside of the drum brush, the impeller having:
• one end connected to the other end of the driver to be rotated together with the drum brush;
• and
• an other end connected to the outlet duct of the second cover so that air inside of the drum brush is drawn into the outlet duct by a rotation of the impeller,
• wherein the outside air enters through the inlet of the first cover to introduce directly into the one end of the driver to cool the inside of the driver, discharges from the driver through the plurality of exhaust holes to the inside of the drum brush, is guided to the outlet duct of the second cover by the impeller, and flows through the suction inlet to the connection pipe.