Dosing system, housing part for a dosing unit and dosing unit

摘要

Dosing system (10) for dosing a dosing fluid with at least one dosing unit (20), a fluid supply component (12) that directs the dosing fluid to the dosing unit (20), and a control module (22) that directs a control fluid to the dosing unit (20), wherein the dosing unit (20) has a first housing part (30), a second housing part (32; 132) and a membrane (40) arranged between the housing parts (30, 32; 132), which has a membrane between the housing parts (30, 32; 132 ) formed into a pump chamber (48) and a metering chamber (50), which are fluidly separated from one another, and in the first housing part (30) control fluid receiving channels (42) are in flow communication with the control module (22), and In the second housing part (32; 132) metering fluid receiving channels (44) are formed, which are in flow connection with the fluid supply component (12), the second housing part (32; 132) having a plate-shaped base body (34) and at least one metering chamber (50) and exactly one inlet chamber (52) and exactly one outlet chamber (54) are provided on a fluid side (38) of the base body (34) and the membrane (40) is thus attached to the base body (34) that it covers the dosing chamber (50), the inlet chamber (52) and the outlet chamber (54), whereby between the inlet chamber (52) and the dosing chamber (50) and / or between the dosing chamber (50) and the outlet chamber (54) at least one overflow channel (62) designed as a depression in the plate plane of the base body (34) is provided, and wherein the second housing part (32; 132) is detachably and in particular positively connected both to the first housing part (30) and to the fluid supply component (12) or the second housing part (32; 132) is non-detachably connected to the first housing part (30) and detachably to the fluid supply component (12) ,