| 摘要 |
A dosing device (3) for dosing a service liquid in a water stream discharged from a flushing tank, comprises a reservoir (10) containing a service liquid, a pumping system (11) and a supply tube (12); the pumping system (11) has a tubular dosing chamber (14), a piston (17) slidable in the chamber (14) and operated by a float (18) via a lever system (19), and a lateral delivery conduit (20) communicating with the chamber (14); the piston (17) is movable, operated by the float (18), with an upward movement, in which the piston (17) draws service liquid from the reservoir (10) in the chamber (14), and a downward movement, in which the piston (17) discharges service liquid from the chamber (14) in the supply tube (12).
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