Abstract: A robot cleaner for cleaning ambient air in a cleaning area while cleaning a cleaning surface, and a system thereof. The robot cleaner and the system thereof comprise a body, a driving part driving a plurality of wheels disposed at a lower portion of the body, a dust suction part formed in the body to draw-in dust from a cleaning surface, and an air cleaning part formed in the body to draw-in dust-ladened air from a cleaning area. The robot cleaner cleans the air and discharges cleaned air, and, utilizing a controller disposed in the body, controls the driving part and the air cleaning part. Accordingly, since the robot cleaner provides cleaned and fresh air to a predetermined cleaning area while cleaning a surface, it contributes to a fresher residential environment.

Abstract: Disclosed is a driving apparatus for a robot cleaner enabling drive wheels to be in contact with a floor all the time. The driving apparatus for a robot cleaner includes a robot cleaner main body, driving motors mounted in the robot cleaner main body, and for transferring power to drive wheels, driving motor housings hinged with the robot cleaner main body, and for accommodating the driving motors therein, and pressure members disposed between the robot cleaner main body and the driving motor housings, and for pressing the driving motor housings. Accordingly, the driving motor housings are mounted to rotate about the center of the rotation hinges so that the drive wheels come in contact with the floor all the time, preventing the drive wheels from being lifted over the floor and making lost rotations due to curved portions of the floor or obstacles.

Abstract: A robot cleaner system for detecting an external recharging apparatus which is positioned in a non-detectable area by an upper camera thereof, and a docking method for docking the robot cleaner system with the external recharging apparatus. The robot cleaner system includes an external recharging apparatus with a power terminal connected to a utility power supply, a recharging apparatus recognition mark formed on the external recharging apparatus, and a robot cleaner, having a recognition mark sensor that detects the recharging apparatus recognition mark, and a rechargeable battery. The robot cleaner automatically docks to the power terminal to recharge the rechargeable battery. The recharging apparatus recognition mark is made of retroreflective material or a metal tape, and the recognition mark sensor may be a photosensor or a proximity sensor.

Abstract: A robot cleaner, a robot cleaning system and a method for controlling the same that is capable of independently determining whether a cleaning work in a work area is completed.