Abstract: A pool cleaning robot that may include a drive motor; an impeller; an impeller motor that is configured to rotate the impeller; wherein the impeller, once rotated at a first rotational direction, is configured to induce fluid to flow through the pool cleaning robot; a filter for filtering fluid that flows through the pool cleaning robot; and wherein the filter and the impeller are detachably coupled to one or more elements of the pool cleaning robot; and are configured to concurrently exit the pool cleaning robot while the impeller motor remains coupled to the one or more elements of the pool cleaning robot.

Abstract: A pool cleaning robot that may include a filtering unit for filtering fluid that passes through the filtering unit; a calorimetric sensor for sensing a cleanliness related parameter of the filtering unit while the pool cleaning robot is submerged in the fluid; and a controller that is configured to at least assist in determining, based on the cleanliness related parameter of the filtering unit, a cleanliness of the filtering unit.

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 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 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 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 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: A pool cleaning robot that may include a filtering unit for filtering fluid that passes through the filtering unit; a calorimetric sensor for sensing a cleanliness related parameter of the filtering unit while the pool cleaning robot is submerged in the fluid; and a controller that is configured to at least assist in determining, based on the cleanliness related parameter of the filtering unit, a cleanliness of the filtering unit.

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 (i) a turbine that is at least partially disposed within a fluid path of the robot to extract energy from flow of fluid through the fluid path; (ii) an electrical generator for providing electrical power thereto and adapted to be driven by the turbine; (iii) a rechargeable power source arranged to be charged by the electrical generator, and (iv) 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 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 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 for cleaning a surface of a swimming pool, said robot comprising: a main housing; main wheels being configured for propelling the robot; an auxiliary brushwheel disposed between said main wheels and configured for being rotated by the robot about an axis of rotation; and at least one inlet being formed in a bottom panel of the housing between said main wheels and being configured for intake of water and debris, wherein said main wheels are configured for being rotated by the robot at a first angular velocity, and said auxiliary brushwheel is configured for being rotated by the robot at a second angular velocity which is greater than the first angular velocity.

Abstract: A cleaning robot that may include a control unit, a drive motor, a jet generator, a housing, a waterline proximity sensor, a filtering unit and a brushing unit. The jet generator has first and second openings that are positioned at opposite sides of the housing. The control unit is arranged to control the jet generator for jetting fluids to thereby inducing the pool cleaning robot to move according to a waterline movement scheme when the pool cleaning robot is proximate to the waterline. The waterline proximity sensor is arranged to sense proximity of the pool cleaning robot to a waterline. The drive motor and the jet generator are substantially closer to a front edge of the housing than to a rear edge of the housing.

Abstract: A pool cleaning robot for cleaning a surface of a swimming pool, said robot may include: a main housing; main wheels being configured for propelling the robot and for rotating at a first angular velocity; at least one auxiliary brushwheel disposed between said main wheels; and at least one inlet being formed in a bottom panel of the housing between said main wheels and being configured for intake of water and debris; wherein said robot is configured for rotating said auxiliary brushwheel about an axis of rotation at a second angular velocity which is substantially greater than the first angular velocity; wherein said second angular velocity is at least substantially twice that of the first angular velocity.

Abstract: A pool cleaning robot is provided for cleaning a surface of a swimming pool. The robot comprises a main housing, a pair of main wheels disposed at opposite ends of a bottom panel of the housing spanning along a majority of its width and carrying a pair of continuous tracks spanning between edges thereof, the main wheels being configured for rotating at a first angular velocity, at least one inlet being formed in the bottom panel between the main wheels and being configured for intake of water and debris, and at least one auxiliary brushwheel disposed between the main wheels. The robot is configured for rotating the auxiliary brushwheel about an axis of rotation at a second angular velocity which is substantially greater than the first angular velocity.

Abstract: A suction-powered pool cleaning robot is provided, including a fluid outlet, configured for connection to a suction hose, and a fluid inlet, with a fluid path therebetween, a turbine, which may be any suitable device is configured to extract energy, such as in the form of rotational motion, from a fluid flow, at least partially disposed within the fluid path so as to extract energy from flow of fluid therethrough, and an electrical control system configured to regulate at least some of the operations of the robot, the control system including an electrical generator for providing power to the control system and configured to be driven by the turbine, and an electronic controller configured for the regulation.

Abstract: A system for determining the effectiveness of the filtering and maneuverability of a robot for cleaning swimming pools, the robot includes a robot propelling motor, at least one water pump having an impeller and an impeller motor, a pool water inlet leading to a filter, a filtered water outlet, and a propelling mechanism for propelling the robot along the floor and/or walls of the swimming pool, the system comprising a computer for determining and setting an initial power to be supplied to the impeller motor, a first circuit for sensing the actual power supplied to the impeller motor during its operation, a second circuit for calculating the ratio between the set power and an instantaneous power supplied to said impeller motor, and a producer connected to the second circuit for producing an indication signal when the ratio exceeds a predetermined value.