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: 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 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: An cleaning brush for a pool cleaning apparatus, the cleaning brush that includes: a central portion that has a longitudinal axis; a right handed fin that surrounds a first section of the central portion; a left handed fin that surrounds a second section of the central portion; first protuberances that are oriented in relation to the right handed fin; and second protuberances that are oriented in relation to the left handed fin.

Abstract: There may be provided a system comprising a spectroscopic device; wherein the spectroscopic device is configured to analyze a fluid of a pool.

Abstract: A pool cleaning robot, that may include a filter; a first impeller; a driving unit arranged to move the pool cleaning robot; an external housing that comprises a first inlet and a first outlet; a first pump motor arranged to rotate the first impeller; wherein when the first pump motor rotates the first impeller rotates along a first rotational direction causes fluid to be drawn through the first inlet and causes a first portion of the fluid to be filtered by the filter to provide filtered fluid that exits through the first outlet of the housing; wherein when the first pump motor rotates the first impeller rotates along a second rotational direction that is opposite to the first rotational direction, thereby performing a backwash operation of the filter.

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 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 pool cleaning apparatus that may include a filter; a entrapment cell; a first impeller; a first pump motor arranged to rotate the first impeller; a driving unit arranged to move the pool cleaning robot; a structural element; and an external housing that comprises a first inlet and a first outlet; wherein the filter and the structural element define a first space that has a spiral portion; wherein the first impeller is arranged to rotate along a first rotational direction; wherein rotation of the first impeller along a first rotational direction causes fluid be drawn through the first inlet and to follow a spiral path within the first space during which a first portion of the fluid is filtered by the filter to provide filtered fluid that exits through the first outlet of the housing; and a second portion of the fluid follows the spiral path until entering the entrapment cell.

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 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 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 pool cleaning robot comprising: a housing; an impeller and a motor; at least one filter compartment configured for accommodating a filter unit therein; an impeller outlet formed in a housing top surface; at least one additional outlet other than the impeller outlet configured for being fluidly connected to an external suction and filtering system; at least one bottom inlet formed in said housing bottom configured for a first fluid communication with the impeller outlet via said filter unit, thereby defining a first fluid path; and at least one bottom inlet formed in said housing bottom configured for a second fluid communication with said additional outlet via a second fluid path at least partially different from the first fluid path, said second fluid path constituting a part of an external suction and filtering fluid path created when said additional outlet is fluidly connected to an external suction and filtering system.

Abstract: An automatic system for locking and unlocking a pool cover having a leading edge at an edge of a pool, the pool having a water surface, the pool cover deployable by a pool cover deployment system, the automatic system comprising: at least one leading edge slot piece having a rectangular slot therein, the leading edge slot piece integratable into the leading edge; at least one float locker subassembly configurable floatably on the water surface and constrained at the edge of the pool, the float locker subassembly having a space defined therein in which the at least one leading edge slot piece is adapted to be received, locked, and unlocked; and an autolock control unit adapted to communicate with the at least one float locker subassembly and the pool cover deployment system, wherein the control unit is further adapted to command and verify locking and unlocking.

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: An cleaning brush for a pool cleaning apparatus, the cleaning brush that includes: a central portion that has a longitudinal axis; a right handed fin that surrounds a first section of the central portion; a left handed fin that surrounds a second section of the central portion; first protuberances that are oriented in relation to the right handed fin; and second protuberances that are oriented in relation to the left handed fin.

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 swimming pool cleaning assembly that has at least one ultrasonic generator, a swimming pool cleaning machine including a support frame, a housing shell provided with a bottom wall and arranged around the support frame, a driver located in the housing shell, advancer supported by the frame and arranged to be place, in use, on a surface to be cleaned of a swimming pool and driven, at least one water suction opening provided in the bottom surface of the housing shell, which is designed to be put in fluid communication with water suction, driver being tightly sealed in the housing shell and electrically connectable to the supply, the ultrasonic generator being arranged at the bottom wall facing, in use, the surface to be cleaned.