Water tank with filter cartridge, filter cartridge for use in a water tank and water tank for use with a filter cartridge

摘要

Water tank (66) with filter cartridge (131) for water-carrying devices, with a suction connection (167) on the water tank for sucking water from the water tank with means for generating a negative pressure and a tank-side filter connection (101) for connecting the filter cartridge inside the water tank is characterized in that receiving guide tracks (115) for receiving radial projections (116) formed on the filter cartridge are formed on the tank-side connecting piece (101), and the filter connection (101) has at least one, at least three, axial recesses (101.1 ) comprehensive coding structure is provided, which matches a complementary coding structure (136.1) of the filter cartridge (131) according to the key/lock principle, with the housing (136) of the filter cartridge (131) in the front, end-side area having three projections protruding opposite recesses (136.2). (136.1), which in turn represent axially aligned coding structures that enable the filter cartridge to be used properly in the relevant tank connection element in such a way that it closes bypass or short-circuit openings (165), so that it is prevented that fresh water in the water tank flows directly through a passage opening (106) with a correspondingly large cross section and the further bypass or short-circuit opening (165) of the tank-side filter connection element (101), which is behind it and also has a correspondingly large cross section, flows directly into a device intake area (168), but only a certain amount of fresh water, which flows from the through-opening (106) can flow through a recess (160) formed in the projection (136.1) to implement a bypass function and through the bypass or short-circuit opening (165).