The present disclosure relates to a method of controlling a robot cleaner including a pair of rotary plates having lower sides to which mops facing a floor surface are coupled, the robot cleaner being configured to move by rotating the pair of rotary plates, the method including: a first forward movement step of moving the robot cleaner forward from a starting point toward a predetermined target point; a first rotation step of rotating the robot cleaner; a second forward movement step of moving the robot cleaner forward after the first rotation step; and a second rotation step of rotating the robot cleaner after the second forward movement step, such that the floor surface may be repeatedly cleaned only by the forward movement and the rotation.

Provided is a robot cleaner in which a liquid may be uniformly supplied to a plurality of cleaners and which is easily inspected and repaired in case of defects such as water leakage. The robot cleaner includes a main body portion; a plurality of cleaner fixing portions provided at a lower portion of the main body portion, a plurality of cleaners for wet cleaning being fixed to the plurality of cleaner fixing portions, respectively; a liquid supply portion provided in the main body portion and storing a liquid and supplying the stored liquid to at least one of the plurality of cleaners; a liquid distribution member provided at a lower portion of the main body portion and directly supplying the stored liquid to at least one cleaner of the plurality of cleaners; and a flow path portion providing a movement path of the liquid from the liquid supply portion to the liquid distribution member.

A cleaner includes a body, a left spin-mop module and a right spin-mop module configured to perform mopping, and a water supply module configured to supply water to the left spin-mop module and the right spin-mop module. The water supply module includes a water tank to store water therein, a pump to pressurize the water in the water tank to move the water to the left spin-mop module and the right spin-mop module, a first supply pipe connecting the water tank and the pump, a common pipe connected to the pump, the common pump configured to guide movement of the pressurized water from the pump, a first branch pipe configured to guide a first portion of the water in the common pipe to the left spin-mop module, and a second branch pipe configured to guide a second portion of the water in the common pipe to the right spin-mop module.

A mop includes a floor cleaning portion, an upper absorbing portion located over the floor cleaning portion, the upper absorbing portion being configured to receive water supplied from a water tank to supply the water to the floor cleaning portion, and an attaching portion located over the floor cleaning portion, the attaching portion being connected to the upper absorbing portion. At least a portion of the attaching portion is located to overlap an outer edge of the upper absorbing portion in a vertical direction.

An automatic floor-disinfection robot for floors of hospital rooms, including a moving device, a alarm and a disinfection device. The moving device is a disc-shaped robot, and includes a chassis moving mechanism, a support plate and a top plate arranged successively from bottom to top. The disinfection device includes a disinfection assembly and a baffle. The disinfection assembly includes a liquid supply mechanism, a liquid spray mechanism and a fan.

A mobile robot is configured to move a main body and rotate a cleaning cloth by means of a motor to clean a surface. A location change of the main body is analyzed to determine a traveling state of the robot. The absence of the cleaning cloth is detected and the operation of the robot is controlled based on the detected travelling state. A user is notified about the absence of the cleaning cloth.

A cleaning machine may include: a first brush including a first brush shaft and a first brush body held by the first brush shaft; a second brush including a second brush shaft and a second brush body held on the second brush shaft; a first brush attaching member having a first shape, wherein one end of the first brush shaft is detachably attached to the first brush attaching member; and a second brush attaching member having a second shape, wherein one end of the second brush shaft is detachably attached to the second brush attaching member. The one end of the first brush shaft may have a first corresponding shape that corresponds to the first shape. The one end of the second brush shaft may have a second corresponding shape that corresponds to the second shape. Other end of the first brush shaft may have the second corresponding shape.

A floor cleaning machine with a base, a control handle and a joint that permits that permits the handle to be pivoted in arbitrary directions relative to the base. The joint has first and second joint elements that are each attached to a corresponding of the base and the control handle. The first joint element has an envelope in the shape of a ball socket and is received into the second joint element. The first joint element is pivotable relative to the second joint element about a stationary fulcrum. The center of the envelope is non-displaceable relative to the second joint element. Grooves, which run in an arcuate manner, are provided on one of the first and the second joint elements, while corresponding engagement parts are provided on the other one of the first and the second joint elements and extend into corresponding ones of the grooves.

A method, performed by a robot vacuum cleaner, of planning a cleaning route includes: dividing an indoor space into at least one cleanable region based on an indoor space map generated using at least one sensor included in the robot vacuum cleaner; dividing the at least one cleanable region into a plurality of partial regions based on a cleaning mode of the robot vacuum cleaner; and planning a first cleaning route to control a number of direction changes of the robot vacuum cleaner with respect to each of the plurality of partial regions based on the cleaning mode being a first mode.

Disclosed is a wet duster module for a cleaner including: a water supply nozzle for discharging water from the water tank to the duster, and the water supply nozzle includes: a nozzle body having a water outlet for discharging water to the duster at one end thereof, and as the water outlet is formed to be inclined, waterdrops forming on and blocking the water outlet may be prevented and clogging the water outlet with foreign substances contained in the waterdrops, as the formed waterdrops are dried up, may be prevented.