Whirlpool Corporation

Clemens Jung

Peter Schwarzweller

Konrad Petry

Reinhold Baltes

Gerhard Kersten

Christian Loch

The invention relates to a method of operating a dishwasher with a central control unit, by measuring the turbidity of the rinsing liquid and establishing the course of the program as a function of the turbidity of the rinsing liquid. In a pre-rinse operation, measurement values determined by a sensor system are derived from the soiling of the rinsing liquid and supplied to the control unit, which calculates therefrom associated parameters for the further course of the program and establishes the latter correspondingly.

Method of operating a dishwater with a central control unit

The invention relates to a method of operating a dishwasher with a central control unit by measuring the turbidity of the rinsing liquid and establishing the course of the program as a function of the turbidity of the rinsing liquid, the program beginning with a pre-rinse program step. In order to achieve a completely automatic operation, data for the further course of the program are calculated in the pre-rinse program portion with determined measurement values of turbidity and evaluation thereof.

Method of operating a dishwasher with a central control unit by measuring the turbidity

The invention relates to a device for measuring the turbidity of the rinsing liquid in a dishwasher by means of a turbidity sensor. If it is provided according to the invention that the turbidity sensor is incorporated into the inlet flow of the circulation pump into the water drain shaft of the dishwasher and continuously measures the turbidity of the rinsing liquid, that the upper and lower spraying plane can be operated alternately, that a difference value can be derived from the turbidity values associated with upper and lower spray plane, that parameters for the quantity and the type of soiling can be derived from the turbidity values and the difference value and that the further rinse program can be established and controlled with these parameters, then, with low complexity, measurement values for the degree of soiling can be obtained, from which value parameters for the further course of the program can be delivered.

Device for measuring the turbidity of the rinsing liquid in a dishwasher

The invention concerns an optical sensor for measuring the property of a gaseous or liquid medium, particularly the opaqueness of a washing or rinsing liquid in a washing or rinsing machine, with at least one radiation source, a radiation receiver and a light-transmitting sensor body, with an optical boundary surface, which, depending on the nature of the medium present outside the boundary surface of the sensor body, to a greater or lesser degree transmits to the radiation receiver and/or reflects the radiation directed on to it, resulting at the radiation receiver in different measurement signals which characterise the reflectivity and the refractive index conditions at the boundary surface. Unambiguous measurement signals for process control of a washing or rinsing machine are obtained through separate sensing of the transparency and reflection of the medium.

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Bruecken, Germany

Clemens Jung