A surface cleaning apparatus includes an upright body and a base adapted for movement across a surface to be cleaned, a fluid delivery system, and a recovery system. The surface cleaning apparatus can be configured to clean multiple surfaces, including hard and soft surfaces, and for different cleaning modes, including wet cleaning, dry vacuum cleaning, and self-cleaning. Methods for self-cleaning a surface cleaning apparatus are also provided.

An apparatus for cleaning a surface includes a liquid delivery system for storing cleaning liquid and delivering the cleaning liquid to the surface to be cleaned, a fluid recovery system and a control system. The control system includes a controller that is coupled to a sensing assembly. Methods of operating the same include sensing foam or liquid with the sensing assembly.

A method for operating a floor cleaning machine on a floor surface. The floor cleaning machine includes a cleaning-liquid container, a dirty-liquid container, a chassis for moving the floor cleaning machine over the floor surface, a cleaning means and a dirty-liquid take-up means. The method includes: sensing an amount of cleaning liquid supplied from the cleaning-liquid tank to the cleaning means within a first time interval while moving the floor cleaning machine; sensing an amount of dirty liquid being removed from the dirty-liquid take-up means to the dirty-liquid container within a second time interval while moving the floor cleaning machine; comparing the sensed amount of cleaning liquid against a first threshold value; comparing the sensed amount of dirty liquid against a second threshold value; outputting a first fault signal if the sensed amount of cleaning liquid is greater than the first threshold value and the sensed amount of dirty liquid is less than the second threshold value.

A reservoir device includes: a liquid storage structure, configured to store liquid; a liquid feeding assembly, configured to feed the liquid into the liquid storage structure; a barrier assembly; a sensing field generator, configured to generate a sensing field; a sensor; and an electrical control assembly. The barrier assembly is arranged inside the liquid storage structure. The sensor is configured to sense the sensing field. The barrier assembly is configured to float under a buoyance action of the liquid, and to block the sensor from sensing the sensing field when the barrier assembly floats in a first liquid level position. The electrical control assembly is configured to control the liquid feeding assembly to stop feeding the liquid into the liquid storage structure when the barrier assembly blocks the sensor from sensing the sensing field.

An appliance comprising an air flow path extending from an air inlet, by which water and air are introduced to the appliance, to an air outlet. A water separator is positioned in the air flow path, which, when in operation, separates the water from the air. A water storage chamber is in fluid flow communication with the water separator, which stores the water separated from the air. The appliance also comprises an automatic closure member movable between an open position and a closed position. When the automatic closure member is in the open position, the water storage chamber is in fluid flow communication with the water separator; when in the closed position, the water storage chamber is isolated from the water separator. The automatic closure member moves from the open position to the closed position when the pressure in the water separator increases above a predetermined level.

Provided are a cleaner having a circulation system of collecting water used in damp cloth, filtering the same, and supplying the filtered water to the cloth, and a control method thereof. The cleaner includes a storage unit storing water, a collecting unit intaking water used in a cloth and introducing intaken water to an upper side of the storage unit, a filter unit filtering water collected by the collecting unit, a water supply unit allowing water within the storage unit to flow out from a lower portion of the storage unit so as to be supplied to the cloth, a vacuum motor operated to cause water to be intaken to the storage unit through the collecting unit, and a pump operate to allow water to be transferred through the water supply unit.

The present disclosure discloses a control method and a controller for a cleaning robot including: obtaining a remaining power or a charging instruction of the cleaning robot; and controlling liquid discharge of a liquid container of the cleaning robot according to the remaining power or the charging instruction. When the liquid container stops discharging liquid, the cleaning robot is controlled to stop working or to charge after running for a preset time. The control method of controlling residual moisture of a rag of the cleaning robot when the cleaning robot is charged can effectively avoid damage to a ground caused by the residual moisture on the rag when the cleaning robot is charging.

An extraction cleaner includes a portable extractor and a base adapted to be moved to perform a cleaning operation on a floor surface when the portable extractor is operably mounted to the base. The portable extractor includes a recovery tank assembly provided on the housing adjacent to the recovery tank assembly.

A method for recovering waste liquid includes: obtaining a liquid usage amount of a cleaning robot, and controlling a maintenance station to recover the waste liquid collected by the cleaning robot according to the liquid usage amount.

The present disclosure relates to the field of cleaning robot technology, and in particular to a base station, which is adapted for cooperating with a cleaning robot having a mop member that is configured to mop a floor, the base station includes a base station body and a mop member cleaning device arranged on the base station body, and the mop member cleaning device is configured to clean the mop member. The base station further includes a scraping and blocking member, the scraping and blocking member is configured to prevent cleaning fluid from splashing during a process of the mop member cleaning device cleaning the mop member.