| 摘要 |
Apparatus for generating foam for use in fire fighting having two plates (50, 60) housed in a chamber (10) which respectively introduce pressurized air and a water/surfactant solution between the two plates (50, 60) where foam is generated and emitted from an aperture (40) on the side of the chamber (10). The pressurized water/soap solution enters the chamber (10) through an orifice (52) in one plate (50). Pressurized air enters the chamber (10) through a number of channels (64) bored through the other plate (60), such channels (64) appearing in an annular groove (63) which circumscribes the water inlet (52). The restricted area (70) balances the pressure between the incoming water and the incoming air by achieving an equilibrium at some particular radius out from the center of the two plates (50, 60). The apparatus also includes a pressure regulating system (182) that automatically cuts off the flow of pressurized water and air when the foam dispensing nozzle (174) is turned off.
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