Abstract: A method for charging a pool cleaning robot, the method may include positioning a first wireless charging element of a pool cleaning robot within a charging range of a second wireless charging element of a floating unit; wherein the floating unit is electrically and mechanically coupled to an external power source, wherein the positioning comprises moving at least one of the pool cleaning robot and the floating unit; and wirelessly charging, by the second wireless charging element, the first wireless charging element, wherein the charging occurs while maintaining the first wireless charging element within the charging range of the floating unit, despite movements of the floating unit.

Abstract: A method and a pool cleaning robot that may include a housing; an opening formed in the housing; an impeller that is configured to rotate and to induce fluid to flow through the pool cleaning robot; a filter for filtering fluid that flows through the pool cleaning robot; and wherein at least one of element the filter and the impeller is configured to exit the pool cleaning robot through the opening.

Abstract: A method and a set of pool cleaning robots for cleaning a pool. The set includes a first pool cleaning robot and a second pool cleaning robot that differ from each other by at least one unit out of a propulsion unit and a cleaning unit. Each one of the first pool cleaning robot and the second pool cleaning robot includes a filtering unit, a housing, and a controller.

Abstract: A pool cleaner that may include a drive mechanism for moving the pool cleaner; a housing that has a first fluid opening and a second fluid opening; a filtering unit that comprises a filter enclosure and a filtering element; a fluid flow mechanism for inducing a flow of fluid through the filtering element in a first direction during a filtering process and for inducing a flow of the fluid through the filtering element at a substantially opposite direction during a backwash process; and a debris trap that is configured to receive debris from the filtering element during the backwash process and to substantially prevent the debris from exiting the debris trap during the filtering process.

Abstract: A pool cleaner for cleaning a pool, the pool cleaner may include a filtering element for filtering fluid; at least one sensor for sensing an actual yaw of the pool cleaner and an actual orientation of the pool cleaner; at least one steering element that is configured to move the pool cleaner along a cleaning path, during a cleaning process of a certain region of a sidewall of the pool; wherein the cleaning path comprises a cleaning path segment that has a cleaning path segment yaw that is a non-vertical yaw; wherein the certain region is fully submerged; and a controller that is configured to control the at least one steering element, based on the actual yaw of the pool cleaner.

Abstract: A pool cleaning robot that includes a ballast tank for controlling a buoyancy of the submarine pool cleaner; at least one cleaning element for cleaning debris from an underwater surface of a pool while the pool cleaning robot hovers over the underwater surface; a propulsion module that is configured to propel the submersible pool cleaner; and a steering module that comprises a rudder and diving planes.

Abstract: A method for cleaning a region of a pool, the method may include moving a pool cleaning robot along a cleaning path that covers the region while acquiring, at first different points of time and by a sensing unit of the pool cleaning robot, first images of first scenes, at least one first scene at each first point of time; wherein the acquiring of the first images is executed while illuminating the first scenes by the pool cleaning robot; detecting, in at least one first image, illumination reflected or scattered as a result of the illuminating of the first scenes; removing from the at least one first image information about the illumination reflected or scattered; determining, based at least in part of on the first images, first locations of the pool cleaning robot; and wherein the moving is responsive to the first locations of the pool cleaning robot.

Abstract: A method for controlling a distribution of personal data generated by a pool cleaning robot, the method may include acquiring, by the pool cleaning robot, visual information that potentially comprises personal data; determining, by the pool cleaning robot, whether the pool cleaning robot received an authorization to output the visual information from the pool cleaning robot; and outputting the visual information from the pool cleaning robot only after receiving the authorization to output the visual information.

Abstract: A pool cleaning robot that may include a filtering unit for filtering water that passes through the pool cleaning robot; and a sensor for sensing a cleanliness of the filtering unit while the pool cleaning robot is submerged in water; wherein the sensor is a pressure sensor for sensing a pressure of fluid within the pool cleaning robot or an image sensor for imaging the filtering unit.

Abstract: A pool cleaning robot that may include a filtering unit for filtering fluid; a housing that at least partially surrounds the filtering unit; an impeller configured to induce fluid to pass through the filtering unit when rotated at a first direction; a pump motor for rotating the impeller; a drive system; first interfacing elements that are configured to interface with the pool during at least a part of a cleaning process of the pool; and at least one second interfacing element that extends outside a bottom of the housing without reaching a virtual plane defined by bottoms of at least two of the first interfacing elements.

Abstract: A pool cleaning robot for cleaning a pool that may include a filtering unit; a housing; an impeller; a pump motor for rotating the impeller; a drive system; and an interface for coupling an extraction element to the pool cleaning robot, during a pool exit process; and wherein during at least a part of the pool exit process an upper end of the interface is higher than the housing.

Abstract: A pool cleaner for cleaning a pool, the pool cleaner may include a filtering element for filtering fluid; at least one sensor for sensing an actual yaw of the pool cleaner and an actual orientation of the pool cleaner; at least one steering element that is configured to move the pool cleaner along a cleaning path, during a cleaning process of segments of multiple sidewalls of the pool; wherein the cleaning path mostly includes substantially horizontal cleaning path segments that have a cleaning path segment yaw that is a substantially horizontal yaw; wherein the certain region is fully submerged; and a controller that is configured to control the at least one steering element, based on the actual yaw of the pool cleaner.

Abstract: A dry docking station that may include an interface that comprises an interface portion for contacting a self-propelled debris collecting robot when the self-propelled debris collecting robot is positioned at a container replacement position; a container manipulator that is arranged to assist, while the self-propelled solid debris collecting robot is contacted by the interface, in positioning a new debris collecting container into a debris collection position within the self-propelled debris collecting robot and to extract from the self-propelled debris collecting robot a used debris collecting container; a used container storage module for storing the used debris collecting container after the used debris collecting contains is extracted from the self-propelled debris collecting robot; and a new container storage module for storing the new debris collecting container before the new debris collecting container is positioned in the self-propelled debris collecting robot.

Abstract: A pool cleaning robot that includes a ballast tank for controlling a buoyancy of the submarine pool cleaner; at least one cleaning element for cleaning debris from an underwater surface of a pool while the pool cleaning robot hovers over the underwater surface; a propulsion module that is configured to propel the submersible pool cleaner; and a steering module that comprises a rudder and diving planes.

Abstract: An external docking station may be provided and may a filter manipulator that is arranged to (i) input without human intervention, a filter into a pool cleaning robot that exited a pool and is located in a filter replacement position and to (ii) assist without human intervention, in positioning the filter at a position in which the filter is at least partially disposed within a path formed between a first fluid opening and a second fluid opening of a housing of the pool cleaning robot thereby allowing the filter to apply a filtering operation when fluid passes through the fluid path.

Abstract: A pool cleaning robot that may include a housing, a propulsion mechanism configured to propel the pool cleaning robot along an interior surface of a pool; brushes to clean surfaces of the pool during a cleaning cycle, a filtering system, a suction mechanism to draw liquid from the pool through an inlet into the housing and to discharge it from an outlet; and a detachable sensor that is detachably coupled to the housing and comprises inductive electrical and data transfer connections.

Abstract: A set of pool cleaning robots for cleaning a pool, wherein the set includes a master pool cleaning robot and a slave pool cleaning robot.

Abstract: A pool cleaning robot for cleaning a pool, that may include a housing; a first interfacing element is configured to interface between the pool cleaning robot and a bottom of a pool while the pool cleaning robot cleans the bottom of the pool; and one or more second interfacing elements that are configured to reduce a friction between the pool and the pool cleaning robot during at least a portion of an exit process in which the pool cleaning robot exits the pool.

Abstract: An underwater station that may include a filter manipulator that is arranged to input, without human intervention, a filter into a pool cleaning robot that is located in a filter replacement position and to assist, without human intervention, in positioning the filter at a filtering position in which the filter is at least partially disposed within a fluid path formed between a first fluid opening and a second fluid opening of the housing thereby allowing the filter to apply a filtering operation on fluid that passes through the fluid path.

Abstract: A method for charging and an underwater station that may include a platform and a first contactless charging element for charging a pool cleaning robot mounted on the platform; wherein when the underwater station is positioned in a pool the first contactless charging element is spaced apart from the bottom and sidewalls of the pool.