A household appliance and method

摘要

The present invention relates to a method of handling process water in a household appliance (1) and to a household appliance, for example a dish washer. The household appliance comprises a wash tub (3) for performing wash program cycles and a tank (5) for storing process water to be re-used in a following program cycle, the method comprising the steps of:
- determining (101) the type of detergent used in the household appliance with a sensor unit (7),
- measuring (102) the amount of detergent in the process water with the sensor unit,
- comparing (105) at least one sensor unit output value with a predetermined threshold value to define the quality of the process water, and
- storing (106) at least a part of the process water from a rinse cycle in the tank (5) when the sensor unit output value complies with the predetermined threshold value related to the quality of the process water.