| 摘要 |
The water purification cartridge (2) useful in restaurants or cafes for the treatment of raw water for beverage machines such as coffee machines, comprises a housing (12), which encloses an ion exchanger and is screwed via a screw thread at a cartridge connection armature (4) that has a water supply net, a water outlet and a beverage machine. The housing and the cartridge connection armature are intended with circular coding ribs concentrically arranged to the thread axle of the screw thread. A coding rib is arranged between two neighboring coding ribs. The water purification cartridge (2) useful in restaurants or cafes for the treatment of raw water for beverage machines such as coffee machines, comprises a housing (12), which encloses an ion exchanger and is screwed via a screw thread at a cartridge connection armature (4) that has a water supply net, a water outlet and a beverage machine. The housing and the cartridge connection armature are intended with circular coding ribs concentrically arranged to the thread axle of the screw thread. A coding rib is arranged between two neighboring coding ribs. The coding is captively held through a wedge-, adhesive- or locking connection. The number of coding ribs of the housing is n and the number of coding ribs of the cartridge connection armature is n, n-1 or n+1, where n is a whole natural number. The number of coding ribs is different for differently filled water purification cartridge and/or for different consumers. A change of the number of coding ribs takes place via using a coding ring between two adjacent ribs or via removing the ribs oppositely lying to the coding ring. The coding ribs project axially over a front end of the housing. The projection height of the coding ribs is larger than the interference length of the screw thread. The coding ribs have the same average wall thickness and are separated by annular grooves. The coding ribs surround a connection nozzle (20) of the housing in circular manner and are aligned coaxially to the connection nozzle.
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