Unit for detecting an addition of a cleaning agent in a beverage dispenser
AssigneeWMF Wuerttembergische Metallwarenfabrik AG
InventorPeter Jager
Life of this patent
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Abstract
A unit for detecting an addition of a cleaning agent in a beverage dispenser, in particular in a coffee machine. In order to guarantee that a cleaning agent has been added when automatic cleaning is carried out, a measurement device is provided as well as a method of determining whether a cleaning agent has been added to the aqueous cleaning liquid. Whether a cleaning agent has been added to the aqueous cleaning liquid can be determined in dependence upon the measured conductivity and the measured electrical resistance of the cleaning liquid, respectively.
Claims17
A beverage dispenser, comprising:
- a means (10, 2) for initiating and executing a cleaning process with an aqueous cleaning liquid, and
- a measurement device (9) for determining whether a cleaning agent has been added to the aqueous cleaning liquid during the cleaning process, wherein the measurement device (9) is configured for determining at least one of the conductivity and the electrical resistance of the cleaning liquid,
- the beverage dispenser comprises a brewing unit (5);
- and
- the measurement device (9) is arranged downstream of the brewing unit (5).
A method of cleaning a beverage dispenser with an aqueous cleaning liquid, comprising:
- determining, by means of a measurement device, whether a cleaning agent has been added to the aqueous cleaning liquid;
- wherein the step of determining whether a cleaning agent has been added to the aqueous cleaning liquid is carried out in dependence upon at least one of the measured conductivity and the measured electrical resistance of the aqueous cleaning liquid;
- and
- the measurement device (9) is arranged downstream of a brewing unit (5).
Dependencies are inferred from the claim text.