Pool cleaning robot

Abstract

A pool cleaning robot comprising a frame, at least one inlet, at least one outlet, and a motor carrying module. The robot further comprises a filter unit mountable to the frame. The filter unit has a filter bag with an inlet facing surface and an outlet facing surface. The robot further comprises a filter cavity formed between the outlet facing surface of the filter bag and the frame. The frame has an open area above the cavity. The open area faces the outlet and is designed for the insertion therethrough of the module into the filter cavity when the filter unit is mounted to the frame.

1 . A pool cleaning robot comprising a frame, at least one inlet, at least one outlet, a filter unit mountable to the frame and having a filter bag with an inlet facing surface and an outlet facing surface, a motor carrying module, and a filter cavity formed between the outlet facing surface of the filter bag and the frame, the frame having an open area above said cavity, facing said outlet and designed for the insertion of said module through said area into the filter cavity when the filter unit is mounted to said frame.  
   
   
       2 . A pool cleaning robot according to  claim 1 , wherein said frame has a module-carrying portion formed integrally with said frame, and the motor-carrying module is detachably attachable thereto.  
   
   
       3 . A pool cleaning robot according to  claim 1 , wherein the motor-carrying module is sealed and comprises at least one motor being a drive motor and/or a pump motor.  
   
   
       4 . A pool cleaning robot according to  claim 2 , wherein said robot further includes wheels and said frame includes wheel carrying portions formed integrally with said frame.  
   
   
       5 . A pool cleaning robot according to  claim 4 , further comprising tracks driven by a drive motor mounted in said module and adapted to permit retention of the wheels by the frame, and said frame having track carrying portions to which said tracks are mounted, the track carrying portion being formed integrally with said frame.  
   
   
       6 . A pool cleaning robot comprising a housing having at least one inlet and at least one outlet, a filter unit with a filter bag, and a motor carrying module, the housing comprising a frame having front, back and side walls forming a hollow therebetween and having inner surfaces facing the hollow and outer surfaces facing away from the hollow, the hollow having an open bottom portion adjacent to said inlet designed to receive therethrough said filter bag, and an open top portion adjacent to said outlet designed to receive therethrough said module, the filter unit being detachably attachable to the frame when inserted into said hollow through its bottom portion and the motor carrying module being detachably attachable to said frame when inserted into said hollow through its top portion.  
   
   
       7 . A pool cleaning robot according to  claim 6 , wherein the front, back and side walls of the frame are integrally connected.  
   
   
       8 . A pool cleaning robot according to  claim 7 , wherein said side walls comprise wheel carrying portions and said robot further comprises wheels detachably attachable to wheel carrying portions of the side walls.  
   
   
       9 . A pool cleaning robot according to  claim 7 , wherein said side walls comprise module-carrying portions and said motor carrying module is detachably attachable thereto.  
   
   
       10 . A pool cleaning robot according to  claim 8 , wherein said side wall comprise track carrying portions and said robot further comprises tracks driven by a drive motor mounted in said module and being adapted, when mounted, to permit retention of the wheels by the wheel carrying portion.  
   
   
       11 . A pool cleaning robot according to  claim 8 , wherein the wheel carrying portions of the side walls of the frame are each formed with a notch and said wheels are each formed with a groove adapted to receive said notch.  
   
   
       12 . A wheel adapted for use with a pool cleaning robot and adapted to be received by a frame of the robot, the wheel comprising a longitudinal axis along its length, a track receiving portion, and a guide portion, said guide portion being adjacent the track receiving portion and comprising a groove, adapted to the carried by a notch of the pool cleaning robot, and a rim adapted to prevent dislocation of the wheel from the notch along the axis.  
   
   
       13 . A motor carrying module adapted for use with a pool cleaning robot, said module being designed to be supported by and detachably fastened to horizontal module carrying portions of the robot.  
   
   
       14 . A pool cleaning robot having an axis of symmetry and a weight imbalance across the axis of symmetry, the robot being adapted to propel itself along a trajectory in the direction of the axis of symmetry by generating a first suction, and alter its trajectory as a result of the imbalance, by generating a second suction which is of a lower power than the first suction.  
   
   
       15 . A pool cleaning robot according to  claim 14 , wherein the second suction is sufficient to maintain filtering.  
   
   
       16 . A pool cleaning robot according to  claim 15 , wherein the second suction is approximately 1.5 cubic meters/hour.  
   
   
       17 . A pool cleaning robot according to  claim 14 , wherein the altered trajectory is a curved path.