| 摘要 |
Process and device for cleaning and keeping the cleanliness of surfaces (1) either vertical or sloped exposed to heavy fouling. At the upper edge of the surface to be cleaned a cleaning fluid of low volatility, and foam controlled, having cleaning properties is applied in a thin film by means of a nozzle, in particular a nozzle with fluidic oscillations (4) which does not have moving parts. This film flows continuously without interruption towards the bottom with a high turbulence forming waves (7) at short intervals, influencing significantly the cleaning of the surface. According to the invention one of the best cleaning fluids is constitued by 10% of surface active derivate, 45% of ethylglycol, 15% of polyethylglycol, 3% of dryer-polisher and 0.5% of a bactericide. A cleaning device for windows can be entirely integrated in the spaces (25, 29) of a metal or plastic window frame (20). |
