主权项 |
1. An apparatus (1) for foaming a liquid supplied in a conduit (7) to an outlet arrangement (8), comprising an aerating arrangement (9) disposed in the conduit (7) for mixing air into the liquid, a pump (5) for pumping the aerated liquid from the aerating arrangement (9) to an outlet arrangement (8) for discharging the aerated liquid, the conduit (7) further including downstream of the pump (5) at least one flow resistor (18, 28) which encloses a plurality of adjacent resistor elements (20a, 20b, 20c) which consist of an elastic material and are movable relative to one another and between which passages for the aerated liquid are formed, the flow resistor (18, 28) being provided with a support for the resistor elements (20a, 20b, 20c) by which the resistor elements (20a, 20b, 20c) are supported, and against which they are compressed and densified by pressure forces generated by the liquid forced through the resistor (18, 28). |