This makes possible to wash 3-dimensional surface such as wall, ceiling, curved surface, irregular form and grooved surface, and even human being full-body while in bed, without spilling water around
No water will jet out until the nozzle comes into contact with the surface to be washed. The water gushes out, at the very moment when the nozzle end touches the surface, and washes the surface. However, the cleaning water with removed dirt is sucked instantly into the nozzle without any leakage at all. Spurts of water stops immediately at the moment, when the nozzle end leaves the surface. Jet-out and Stop of water are controlled automatically only by pressure difference arising inside of nozzle, neither microcomputer nor electronic sensor is used.
See video