Automated cleaning method of exterior wall of building

An automated cleaning method for cleaning an exterior wall of a building, comprising:

• providing upper and lower elongated hollow members in respective upper and lower sash rails of said exterior wall, said hollow members extending continuously in a horizontal direction, said upper hollow member containing an electrical conductor and said lower hollow member forming a drainage;
• supporting a cleaning apparatus main unit in a horizontally movable manner on said sash rails, said cleaning apparatus main unit including an intake pipe in fluid communication with a washing fluid contained in said drainage, a nozzle directed toward said exterior wall, and a water supply pump powered via said electrical conductor to pump said washing fluid from said drainage to said nozzle;
• moving said cleaning apparatus main unit in a horizontal direction along said sash rails while operating said water supply pump to spray said washing fluid from said nozzle onto said exterior wall;
• and
• recovering said washing fluid sprayed onto the exterior wall in said drainage.

An automated cleaning method for cleaning an exterior wall of a building having elongated hollow members extending continuously in a horizontal direction within sash rails of said exterior wall, a fluid-tight of said hollow members forming a drainage and an electrically-insulated of said hollow members containing an electrical conductor, said method comprising:

• supplying a washing fluid to said drainage;
• arranging a cleaning apparatus main unit in a horizontally movable manner along said sash rails, said cleaning apparatus main unit being electrically connected to said electrical conductor and being in fluid communication with said washing fluid in said drainage;
• moving said cleaning apparatus main unit in a horizontal direction along said sash rails while drawing washing fluid from said drainage through said cleaning apparatus main unit and spraying said washing fluid onto said exterior wall;
• and
• recovering said washing fluid sprayed onto the exterior wall in said drainage.

An automated cleaning method for cleaning an exterior wall of a building having upper and lower elongated hollow members in respective upper and lower sash rails of said exterior wall, said hollow members extending continuously in a horizontal direction, said upper hollow member containing an electrical conductor and said lower hollow member forming a drainage, said method comprising:

• supplying a washing fluid to said drainage;
• supporting a cleaning apparatus main unit in a horizontally movable manner on said sash rails, said cleaning apparatus main unit including an intake pipe in fluid communication with said washing fluid in said drainage, a nozzle directed toward said exterior wall, and a fluid supply pump powered via said electrical conductor to pump said washing fluid from said drainage to said nozzle;
• moving said cleaning apparatus main unit in a horizontal direction along said sash rails while operating said water supply pump to spray said washing fluid from said nozzle onto said exterior wall;
• and
• recovering said washing fluid sprayed onto the exterior wall in said drainage.