Method and device for automatically optimising the use of detergent in a washing machine, washing-drying machine, dishwasher or the like, by measuring the water hardness

摘要

A method for automatically optimizing the use of detergent in a washing machine, washing-drying machine, dishwasher or the like comprising a usual detergent container or drawer (35), said method consisting of monitoring, at least at the commencement of a machine wash cycle, the conductivity of the water entering the machine and hence its hardness, and on the basis of this feeding a suitable quantity of detergent into the wash tub or environment, this quantity being proportional at least to the measured water hardness. A device for implementing the aforesaid method comprises water conductivity measurement means (1) connected to means (3) for evaluating the measured conductivity value and which control selector means (30) for feeding a suitable quantity of detergent into the wash tub or environment.