Abstract: A robot vacuum cleaner that may increase cleaning efficiency around obstacles includes a main body having an intake to suck in dust and air while the main body is driven on a floor, a shutter installed in front of the intake to be able to move from the main body toward the floor, and a shutter driver configured to supply power to move the shutter.

Abstract: A robot cleaner enables a wet cleaning, has a replaceable cleaning unit, and ensures a sufficient friction force for doing a wet cleaning of a floor. The robot cleaner includes a frame including a wheel for driving, a replaceable cleaning unit formed at a lower part of the frame to clean a bottom surface and disposed in front of the wheel, a tank disposed at an upper part of the wheel and configured to supply fluid to the cleaning unit, a pump configured to pump the fluid contained in the tank such that the fluid contained in the tank is supplied to the cleaning unit, a hose configured to extend to the pump and the upper part of the cleaning unit and through which the fluid pumped by the pump flows, and a bumper formed on a side of the frame.

Abstract: A robot cleaner drives various brushes using a single motor. The robot cleaner includes a main body having a suction port, a main brush rotatably disposed in the suction port, an auxiliary brush rotatably disposed adjacent to the main brush and at least one side brush rotatably installed to move dust to the suction port, wherein the main brush, the auxiliary brush, and the at least one side brush are driven by a single motor in an interlocking fashion.

Abstract: A vacuum cleaner including a wheel, a driving motor configured to provide the wheel with a driving force, and a clutch configured to connect transfer gears to the wheel or to cancel a connection between the transfer gears and the wheel. A body of the vacuum cleaner is able to actively travel because of the transfer gears are connected to the wheel when power is applied to the driving motor and the wheel smoothly rotates without having a detent torque of the driving motor when power is not applied to the driving motor. The wheel is provided with an internal gear, and one of the transfer gears is configured to transfer the driving force of the driving motor by making contact with the internal gear.

Abstract: An air conditioner including a door installed in order to provide a smooth appearance by hiding an outlet is provided. The air conditioner is installed on a wall and includes a front panel including a first panel part provided with an inlet and a second panel part connected to a lower portion of the first panel part and provided with an outlet; a lower panel connected to the second panel part of the front panel and extended toward the wall; and a door installed on a front surface of the second panel part so as to open and close the outlet while being slid, wherein the door is slid along a curved movement trajectory toward the lower panel, and a curvature of the movement trajectory is changed. A clean and smooth appearance may be formed using a door slid along a curved path and a slim appearance may be formed even in the state in which the door is opened.

Abstract: A cleaning robot and a control method thereof include a main body traveling on a floor, and a first sub-cleaning tool and a second sub-cleaning tool mounted at left and right sides of the main body so as to be protruded from the inside to the outside of the main body and selectively performing cleaning Insertion of at least one of the first sub-cleaning tool and the second sub-cleaning tool is controlled when the main body is rotated under the condition that an obstacle is detected. Side brushes of the sub-cleaning tools are inserted into the main body according to the rotation direction of the main body when the main body is rotated during traveling, thus preventing collision with the obstacle.