Abstract: A method of evaluating slipperiness of a floor surface of a water pool by inducing one or more rotation scans of a pool equipment unit by driving a power pulse to one or more electric motors configured to rotate the pool equipment unit deployed on a floor surface of a water pool and at least partially submerged in water of the water pool, accumulating power values of the power pulse while its level is above a motor operation threshold, accumulating values of angular velocity of the pool equipment unit measured starting after the power pulse drops below the threshold until the pool equipment unit stops rotating; computing work energy invested to rotate the pool equipment unit based on the power values and the angular velocity values; computing a slipperiness index of the floor surface based on the work energy; and initiating one or more actions according to the slipperiness index.

Abstract: A pool related platform that may include (i) a drive mechanism for moving the pool related platform; (ii) a housing that has a first fluid opening and a second fluid opening; (iii) a filtering unit that comprises a filtering element; (iv) a fluid flow mechanism for inducing a flow of fluid through the filtering unit in a first direction during a filtering process, and for inducing a flow of the fluid through the filtering element at another direction during a backwash process; (v) an entrapment cell; and (vi) a flow control unit that comprises a flow control element and an inlet that is maintained open during the filtering process and the backwash process; wherein the flow control unit is configured to allow debris and fluid from the filtering unit to enter the entrapment cell, and is configured to substantially prevent a flow of fluid and debris from the entrapment cell to the filtering unit.

Abstract: A pool cleaning robot as substantially illustrated in the specification. A method as substantially illustrated in the specification.

Abstract: A cleaning robot may be provided and may include a housing comprising at least one inlet and an outlet; a filtering unit for filtering fluid; a bypass mechanism for bypassing the filtering unit; and a fluid suction unit that is arranged to direct towards the outlet fluid that (a) passes through the at least one inlet and (b) passes through at least one out of the filtering unit and the bypass mechanism.

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 cleaning robot may be provided and may include a housing comprising at least one inlet and an outlet; a filtering unit for filtering fluid; a bypass mechanism for bypassing the filtering unit; and a fluid suction unit that is arranged to direct towards the outlet fluid that (a) passes through the at least one inlet and (b) passes through at least one out of the filtering unit and the bypass mechanism

Abstract: A cleaning robot may be provided and may include a housing comprising at least one inlet and an outlet; a filtering unit for filtering fluid; a bypass mechanism for bypassing the filtering unit; and a fluid suction unit that is arranged to direct towards the outlet fluid that (a) passes through the at least one inlet and (b) passes through at least one out of the filtering unit and the bypass mechanism.

Abstract: A cleaning robot that includes a housing having a front portion, a rear portion, a door and a hinge; wherein the door is pivotally connected to the rear portion of the housing via the hinge; wherein the rear portion comprises a rear opening; wherein the door is arranged to move between a closed position in which the door substantially closes the rear opening and an open position in which the door does not close the rear opening; wherein the door comprises a floating element or is coupled to a floating element, wherein the floating element is positioned and shaped to induce the door to move to the closed position when the cleaning robot is submerged in fluid and to remain in an open position when out of a pool and positioned in a horizontal position.

Abstract: A pool cleaner that may include a removable floatation and skimmer device, a submerged unit, a controller and a mechanism; wherein the submerged unit comprises a propulsion module and a filter. The controller may be configured to receive or generate a connection indication that indicates whether the removable floatation and skimmer device is connected to the submerged unit; operate the pool cleaner in an operational mode selected out of a skimmer mode and a submerged cleaning mode, based, at least, on the connection indication; and change the operational mode of the pool cleaner.

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 cleaning robot that comprises a housing that comprises a fluid inlet, a fluid outlet, a rear edge and a front edge; a filtering unit; an impeller; a pump motor that is configured to rotate the impeller; wherein the impeller is configured to induce a flow of fluid from the fluid inlet through the filtering unit and towards the fluid outlet; wherein the pump motor is substantially closer to the front edge of the housing than to the rear edge of the housing; and wherein each one of the fluid inlet and the fluid outlet is substantially closer to the rear edge of the housing than to the front edge of the housing.

Abstract: A pool cleaning robot for cleaning a pool, comprising: a housing; and a drive system that is arranged to move the pool cleaning robot in relation to an environment of the pool cleaning robot; wherein the environment comprises the pool and an exterior surface; wherein the drive system comprises: a drive motor system; a group of interfacing modules; a transmission system that is arranged to couple the drive motor system to the group of interfacing modules; and an interface manipulator; wherein interfacing modules of the group are arranged to interface between the pool cleaning robot and the environment; wherein the interface manipulator is arranged to change a spatial relationship between (a) the housing and (b) a selected interfacing module of the group, during an exit process during which the pool cleaning robot exits the pool.

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 cleaning robot that includes a housing having a front portion, a rear portion, a door and a hinge; wherein the door is pivotally connected to the rear portion of the housing via the hinge; wherein the rear portion comprises a rear opening; wherein the door is arranged to move between a closed position in which the door substantially closes the rear opening and an open position in which the door does not close the rear opening; wherein the door comprises a floating element or is coupled to a floating element, wherein the floating element is positioned and shaped to induce the door to move to the closed position when the cleaning robot is submerged in fluid and to remain in an open position when out of a pool and positioned in a horizontal 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 cleaning robot that comprises a housing that comprises a fluid inlet, a fluid outlet, a rear edge and a front edge; a filtering unit; an impeller; a pump motor that is configured to rotate the impeller; wherein the impeller is configured to induce a flow of fluid from the fluid inlet through the filtering unit and towards the fluid outlet; wherein the pump motor is substantially closer to the front edge of the housing than to the rear edge of the housing; and wherein each one of the fluid inlet and the fluid outlet is substantially closer to the rear edge of the housing than to the front edge of the housing

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: 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 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.