Filtering a fluid of a pool

Abstract

A method for operating a pool cleaning robot, the method includes filtering, by the pool cleaning robot and while operating in a fluid filtering mode, fluid of the pool to vacuum fine particles; and cleaning the pool, by the pool cleaning robot while operating in a pool cleaning mode; wherein the cleaning comprises removing coarse particles and filtering the fluid of the pool.

We claim: 
     
         1 . A method for operating a pool cleaning robot, the method comprises:
 filtering, by the pool cleaning robot and while operating in a fluid filtering mode, fluid of the pool to vacuum fine particles;   cleaning the pool, by the pool cleaning robot while operating in a pool cleaning mode; wherein the cleaning comprises removing particles and filtering the fluid of the pool.   
     
     
         2 . The method according to  claim 1 , further comprising circulating the fluid of the pool when operating in the fluid filtering mode. 
     
     
         3 . The method according to  claim 1 , wherein the coarse particles comprise settled debris. 
     
     
         4 . The method according to  claim 1 , comprising operating the pool cleaning robot in the fluid filtering mode for a longer duration than operating the pool cleaning robot in the pool cleaning mode. 
     
     
         5 . The method according to  claim 4 , comprising applying, during the fluid filtering mode, a fluid circulation rate that is higher than a fluid circulation rate applied during the pool cleaning mode. 
     
     
         6 . The method according to  claim 1 , wherein an overall movement rate of the pool cleaning robot while operating in the pool cleaning mode exceeds an overall movement rate of the pool cleaning robot while operating in the fluid filtering mode. 
     
     
         7 . The method according to  claim 1 , comprising operating the pool cleaning robot in at least one operating mode while the fluid of pool is being filtered by a pool filtering system external to the pool cleaning robot. 
     
     
         8 . The method according to  claim 1 , comprising determining by the pool cleaning robot at least one fluid filtering parameter based on a pool cleanliness parameter. 
     
     
         9 . The method according to  claim 8 , comprising determining the pool cleaning parameter based on information sensed by one or more fluid quality sensors of the pool cleaning robot. 
     
     
         10 . The method according to  claim 1 , comprising positioning the pool cleaning robot at multiple locations, while operating in the fluid filtering mode, and filtering the fluid of the pool from the multiple locations while operating in the fluid filtering mode. 
     
     
         11 . The method according to  claim 10 , comprising determining the multiple locations by the pool cleaning robot, based on fluid quality measurements made by the pool cleaning robot. 
     
     
         12 . The method according to  claim 10 , comprising determining the multiple locations using a machine learning process. 
     
     
         13 . The method according to  claim 1 , comprising operating in the fluid filtering mode in a non-continuous manner. 
     
     
         14 . The method according to  claim 1 , comprising applying, by the pool cleaning robot, multiple fluid circulation rates while operating in the fluid filtering mode. 
     
     
         15 . The method according to  claim 1 , comprising dispensing, by the pool cleaning robot one or more chemical agents for improving a quality of the fluid of the pool. 
     
     
         16 . A pool cleaning robot having cleaning and filtering capabilities, the pool cleaning robot comprises:
 a filtering unit;   a coarse particle detachment unit;   a movement unit configured to move the pool cleaning robot;   a controller that is configured to select an operational mode of the pool cleaning robot of a fluid filtering mode and a pool cleaning mode;   wherein when operating in the fluid filtering mode the pool cleaning robot is configured to use the filtering unit for filtering fluid of the pool to vacuum fine particles; and   wherein when operating in the pool cleaning mode the pool cleaning robot is configured to use the filtering unit for filtering fluid of the pool to remove the fine particles and to use the coarse debris detachment unit to remove the coarse particles debris.   
     
     
         17 . A non-transitory computer readable medium for operating a pool cleaning robot, the non-transitory computer readable medium stores instructions executable by the pool cleaning robot for:
 filtering, by the pool cleaning robot and while operating in a fluid filtering mode, fluid of the pool to vacuum fine particles;   cleaning the pool, by the pool cleaning robot while operating in a pool cleaning mode; wherein the cleaning comprises removing coarse particles and filtering the fluid of the pool.   
     
     
         18 . The non-transitory computer readable medium according to  claim 16 , that further stores instructions for operating the pool cleaning robot in the fluid filtering mode for a longer duration than operating the pool cleaning robot in the pool cleaning mode. 
     
     
         19 . The non-transitory computer readable medium according to  claim 17 , that further stores instructions for applying, during the fluid filtering mode, a fluid circulation rate that is higher than a fluid circulation rate applied during the pool cleaning mode. 
     
     
         20 . The non-transitory computer readable medium according to  claim 16 , wherein an overall movement rate of the pool cleaning robot while operating in the pool cleaning mode exceeds an overall movement rate of the pool cleaning robot while operating in the fluid filtering mode. 
     
     
         21 . A method for operating a pool cleaning robot, the method comprises:
 circulating, by the pool cleaning robot and while operating in a fluid filtering mode, fluid of the pool;   cleaning the pool, by the pool cleaning robot while operating in a pool cleaning mode; wherein the cleaning comprises removing particles and filtering the fluid of the pool.