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 for analyzing a fluid of a pool by a floating system. The method may include sensing, by a sensor of the floating system, at least one out of (a) a wind parameter related to a wind that impinges on the floating system and (b) a movement of the floating system; wherein the floating system further comprises a top portion comprises at least one float, a submerged portion that comprises comprises a fluid analysis instrument, a power source, a controller, and a propulsion unit; determining, by the controller, an impact of the wind on the floating system based on the at least one out of the wind parameter and the movement of the floating system; controlling, by the controller, a movement of the floating system based, at least in part, on the impact of the wind; and analyzing, by the fluid analysis instrument, at one or more analysis points, the fluid of the pool to provide one or more fluid analysis results.

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 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 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 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 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 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 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 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 for analyzing a fluid of a pool by a floating system. The method may include sensing, by a sensor of the floating system, at least one out of (a) a wind parameter related to a wind that impinges on the floating system and (b) a movement of the floating system; wherein the floating system further comprises a top portion comprises at least one float, a submerged portion that comprises comprises a fluid analysis instrument, a power source, a controller, and a propulsion unit; determining, by the controller, an impact of the wind on the floating system based on the at least one out of the wind parameter and the movement of the floating system; controlling, by the controller, a movement of the floating system based, at least in part, on the impact of the wind; and analyzing, by the fluid analysis instrument, at one or more analysis points, the fluid of the pool to provide one or more fluid analysis results.

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 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 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 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 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 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 cleaning robot that includes a drive motor; a housing that encloses the drive motor; a brushing element; and a transmission coupled between the brushing element and the drive motor, the transmission is arranged to convert a rotary movement induced by the drive motor to a combination of (a) a rotary movement of the brushing element about a brushing element axis, and (b) a reciprocal movement of the brushing element in parallel to the brushing element axis.

Abstract: A cleaning robot that includes a drive motor; a housing that encloses the drive motor; a brushing element; and a transmission coupled between the brushing element and the drive motor, the transmission is arranged to convert a rotary movement induced by the drive motor to a combination of (a) a rotary movement of the brushing element about a brushing element axis, and (b) a reciprocal movement of the brushing element in parallel to the brushing element axis.