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 set of pool cleaning robots for cleaning a pool, wherein a first pool cleaning robot of the set and a second pool cleaning robot of the set are configured to clean different regions of the pool.

Abstract: A pool cleaning robot may include a housing that has a first fluid opening and a second fluid opening; a filter that comprises a filter core that is at least partially located within the housing and comprises an one or more inlets, an one or more outlets and at least one filtering element positioned between the one or more inlets and the an one or more outlets; and a filter core rotator that is arranged to rotate the filter core during at least one period in which the filter core filters fluid that enters through the one or more inlets to output filtered fluid via the one or more outlets.

Abstract: An external docking station may be provided and may include a filter manipulator that is arranged to (i) input a filter into a pool cleaning robot that exited a pool and is located in a filter replacement position and to (ii) assist 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 pool cleaning robot that may include first and second fluid openings, with a fluid path between the first fluid opening and the second fluid opening; a turbine at least partially disposed within the fluid path so as to extract energy from flow of fluid through the fluid path; an electrical generator; a rechargeable power source; and a controller that is arranged to direct the pool cleaning robot to be positioned in a certain location in which a flow level of fluid that is circulated by a pool fluid circulation system is higher than a flow level of the fluid within a majority of the pool, wherein when positioned at the certain location the fluid that is circulated by the pool fluid circulation system passes through the fluid path.

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 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 cleaning path comprises less than a predetermined number of turns; wherein the predetermined number of turns is associated with another cleaning path that mostly includes vertical yaw cleaning path segments; 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 system for extraction of a pool cleaning robot from a pool, the system may include a base for receiving the pool cleaning robot; and at least one out of (a) an interface device and (b) a pool cleaner electrical power cable winding drum; wherein the interfacing device comprises an interfacing device portion that extends beyond and below the base during a part of the extraction of the pool cleaning robot from the pool; and wherein the pool cleaner electrical power cable winding drum is configured to wind and unwind a power cable of the pool cleaning robot during the part of the extraction of the pool cleaning robot from the pool.

Abstract: A system for maintaining a pool cleaning robot, the system may include a cover, a cleaning unit that is positioned within a space and a cover manipulator, wherein the cover manipulator is configured to move the cover between a first position in which the cover prevents the pool cleaning robot from entering the space and a second position in which the cover defines an opening through which the pool cleaning robot passes to enter the space.

Abstract: An underwater station may include a filter manipulator that is arranged to input a filter into a pool cleaning robot that is located in a filter replacement position and to assist 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 operating a pool cleaner, the method may include receiving, by the pool cleaner, end of cycle location information that defines an end of cycle location; wherein the end of cycle location information is generated by a mobile computer and under a control of a user; and performing multiple cleaning cycles, by the pool cleaner, wherein the performing comprises positioning the pool cleaner, at an end of each cleaning cycle of the multiple cleaning cycles, at the end of cycle location.

Abstract: A system for extraction of a pool cleaning robot from a pool, the system may include a pool cleaning robot interface that is arranged to be coupled to a pool cleaning robot during an exit process during which the pool cleaning robot is extracted from the pool; and a pool cleaning robot manipulator that is coupled to the pool cleaning robot interface, wherein the pool cleaning robot manipulator is arranged to move the pool cleaning robot interface between a first and second portion; wherein when the pool cleaning robot interface is at the first position and is coupled to the pool cleaning robot, the pool cleaning robot is within the pool; wherein when the pool cleaning robot interface is at the second position and is coupled to the pool cleaning robot, the pool cleaning robot is positioned outside the pool.

Abstract: A pool cleaning robot, a mobile computer, and a method for operating a pool cleaning robot, the method may include receiving, by the pool cleaning robot, demarcation information that defines pool zones and pool cleaning robot operational parameters related to the pool zones; wherein the demarcation information is generated by a mobile computer and under a control of a user; and performing a cleaning operation, by the pool cleaning robot, based on the demarcation information.

Abstract: A pool cover system that may include a pool cover; a debris collection unit that is coupled to a front end of the pool cover; and a debris manipulator that is coupled to the debris collection unit and is arranged to move the debris collection unit between a debris collection position and a debris dumping position.

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 method for performing a pool exit process for extracting a pool cleaning robot from a pool, the method may include moving the pool cleaning robot at a path that leads outside the pool; and forcing, during at least a part of the moving of the pool cleaning robot, water to exit the pool cleaning robot by rotating an impeller of the pool cleaning robot.

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 may include a filtering unit for filtering water that passes through the pool cleaning robot; a sensor for sensing a cleanliness of the filtering unit while submerged in water; a controller that is configured to determine, based on the cleanliness of the filtering unit, a cleaning process to be applied on the pool cleaning robot by an external system; and a communication unit that is configured to transmit information about the cleaning process

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: 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.