Upright-type vacuum cleaner having a cyclone dust collecting apparatus

An upright-type vacuum cleaner comprising:

• a cleaner body including a dust collecting chamber and a motor driving chamber, the dust collecting chamber having a first inlet port and a first outlet port, the motor driving chamber being connected to the first outlet port;
• a suction brush movably connected to the cleaner body;
• and
• a cyclone dust collecting means removably mounted in the dust collecting chamber for centrifuging and collecting contaminants entrained in air that is drawn in through the suction brush into the first inlet port, the cyclone dust collecting means including:
• a cover;
• a first cyclone body coupled to the cover, the first cyclone body having a second inlet port communicating with the first inlet port for inducing the air and contaminants into a vortex and collecting contaminants of relatively large particles by centrifugation;
• a second cyclone body coupled to the cover and disposed inside of the first cyclone body, the second cyclone body including a grill having a plurality of perforations through which reverse-ascending air from a bottom of the first cyclone body flows, and a third inlet port for inducing the air from the grill into a vortex;
• a lower door removably mounted on a lower end of the first cyclone body, the lower door having a second outlet port communicating with the first outlet port;
• and
• an outlet pipe connected to the second outlet port for discharging the air from the second cyclone body to the motor driving chamber.