Electrolux Home Products Corporation N.v.

Stefano Galassi

Silvano Cimetta

Fabio Altinier

Marco Giovagnoni

Giovanni Colombera

Alvaro Volpato

Jose Machado

Daniel Kaminski De Souza

Fabio Spizzo

There is described a control system () for controlling unbalance of the wash assembly () in a vertical-rotation-axis washing machine (), wherein a wash assembly () is housed inside a casing (), and has a wash drum () rotating about an axis of rotation (R) substantially parallel to a vertical reference axis (V), and an electric drive unit () for rotating the wash drum () about the relative axis of rotation (R); said control system has first computing blocks () for determining a number of operating quantities (Cm(t), J, alpha (t)) associated with rotation of the wash drum (), and for determining, as a function of the quantities, the time pattern of the amplitude (h(t)) of vertical oscillation of the centre of mass (B) of the wash assembly () in a first direction substantially parallel to the vertical reference axis (V); and a second computing block () for determining the maximum amplitude (H) of vertical oscillation of the wash assembly () within a given time interval (T); the second computing block () also determines whether the maximum amplitude (H) of vertical oscillation satisfies a predetermined relationship with a predetermined threshold (SA), and determines a critical unbalanced condition of the wash assembly () when the predetermined relationship is satisfied.

Unbalance control system for vertical-rotation-axis washing machines

Laundry washing machine () provided with a casing () and with a vibration damper () which is fixed to the casing () so as to reduce vibrations transmitted to the latter; the vibration damper () comprising a supporting frame () rigidly fixed to the casing (), an oscillating mass () housed inside the supporting frame (), and at least one block () of viscoelastic polymeric gel interposed between the oscillating mass () and the supporting frame () to floating support the oscillating mass ().

Household appliance

Provided is a method of minimizing an unbalanced load of laundry within a clothes laundering machine before a high-speed spinning phase. The method includes rotating a drum of the clothes laundering machine at a suitable rotational speed to initially retain at least a portion of the laundry within the drum against an inner surface of the drum; and determining that an unbalanced distribution of the laundry exists within the drum. In response to determining that the unbalanced distribution of laundry exists within the drum, initiating a laundry distribution phase to redistribute the laundry within the drum to reduce at least one of the unbalance mass to a level that is less than or equal to a maximum allowable mass value, and the elevation torque to a level that is less than or equal to a maximum allowable elevation torque. The laundry distribution phase includes decelerating the rotational speed of the drum to a reduced speed that allows at least a portion of the laundry retained against the inner surface of the drum to separate from the inner surface of the drum to be re-distributed within the drum, and subsequent to said decelerating, accelerating the rotational speed of the drum to a suitable speed that is greater than the reduced speed for retaining the re-distributed portion of the laundry against the inner surface of the drum.

Household laundry washing machine with improved spinning phase

Growing community of inventors

Ranzano, Italy

Stefano Galassi