Patent ID: 8510887
Filing Date: 2013-08-20
Classification: D06F

Abstract:
1. A method for eliminating foam in a drum-type washing machine having a program controller for controlling a program sequence, a drum rotatably mounted in a detergent solution tub, a water supply system, a detergent solution discharge system disposed at the base of the detergent solution tub having a detergent solution drain pump, a drive motor for the drum, and a sensor for determining a foam level and/or a negative time gradient of the foam level of a liquid/air mixture contained in the detergent solution tub, the method comprising: detecting a foam level in the drum using the sensor during a run-up to a spin speed of the drum, which is a continuous or discontinuous increase in the rotational speed of the drum, during which the detergent solution pump and the sensor are switched on by the program controller; and adding a small volume of water to the drum from the water supply system during the run-up to spin speed of the drum, if a foam level is detected by the sensor.