A laundry treating appliance includes a treating chamber provided for receiving laundry for treatment, a controller having a memory in which is stored a set of executable instructions including a set of cycles of operations. The laundry treating appliance also includes a user interface operably coupled with the controller and having a touchscreen configured to provide an input and output function for the controller.

A dynamic balancer device for mounting to and balancing a rotatable drum in a laundry treating appliance comprises an enclosed non-metal annular housing having a radial circumferential wall, an annular metal race within the non-metal annular housing disposed against the radial circumferential wall, and a mass disposed in the annular race and movable therein.

Methods of reducing a likelihood of contact between a rotating laundry-container, such as a basket or drum, located within a tub of a laundry treating appliance where the method includes rotating the drum during a measurement period, determining a torque, speed, acceleration, and position of the drum, using a parameter estimator to estimate the position of a mass relative to an imbalance of laundry and accelerating the rotation of the drum when the mass is determined to be angularly spaced from the relative position of the imbalance of laundry.

A washing machine including a cabinet; a tub disposed in the cabinet; a drum arranged inside the tub so as to be rotatable; at least one damper coupled to the cabinet and the tub, and including at least one coil configured to generate a magnetic field based on a voltage applied to the at least one coil, and a magneto-rheological fluid having a viscosity that changes based on the magnetic field; and a controller configured to control the voltage applied to the at least one coil based on a rotation speed of the drum and a vibration value of the tub so as to generate the magnetic field to change the viscosity of the magneto-rheological fluid to reduce the vibration of the tub caused by the rotation of the drum.

A laundry treating apparatus is provided. The laundry treating apparatus includes a cabinet, a drum accommodated in the cabinet, a tub accommodating the drum, and a dynamic absorber provided to absorb oscillation of the cabinet. The dynamic absorber includes a support plate coupled to the cabinet, a first moving mass movably provided on the support plate to absorb oscillation transmitted to the cabinet, and a second moving mass movably provided on the support plate to absorb oscillation transmitted to the cabinet. To absorb the oscillation, a time point at which the second moving mass starts relative motion with respect to the support plate is different from that at which the first moving mass starts relative motion with respect to the support plate.

A laundry treating apparatus is provided. The laundry treating apparatus includes a cabinet, a drum accommodated in the cabinet, a tub accommodating the drum, and a dynamic absorber provided to absorb oscillation of the cabinet. The dynamic absorber includes a support plate coupled to the cabinet, a moving mass provided on the support plate, and a slider interposed between the moving mass and the support plate to apply a frictional force to attenuate a reciprocating motion of the moving mass.

The washing machine includes a tub, a drum, a plurality of balancing units moving along the circumference of a front side or a rear side of the drum in order to reduce imbalance caused by concentration of laundry when the drum rotates, a vibration sensor sensing a vibration amount of the tub, and a controller moving the plurality of balancing units according to the vibration amount of the tub, measured by the vibration sensor. The controller controls a drum motor to rotate the drum at a constant rotation speed, moves the plurality of balancing units in the same rotation direction to minimize the vibration amount of the tub, measured by the vibration sensor, and thereafter moves the plurality of balancing units in different rotation directions to minimize the vibration amount of the tub, measured by the vibration sensor, thereby reducing imbalance.

The present invention relates to a balancer and a washing machine including the same. The balancer includes at least two drive modules which provide a driving force; at least two gear rails having a ring shape which are gear-coupled to each of the drive modules and rotated; at least two balancing weights which move along a circumference of a drum by the rotation of each of the gear rails and change a center of gravity of the drum; a reception coil which generates power from a magnetic field formed by a transmission coil; and a guide case which accommodates at least the reception coil and the drive modules.

A washing machine includes: a tub; a transmission coil provided in the tub and transmitting power wirelessly; an ammeter measuring an input current value of the transmission coil; a cylindrical drum disposed inside the tub and configured to rotate; a balancer for reducing unbalance during rotation of the drum; and a controller controlling the ammeter and the balancer. The balancer includes: a reception coil provided in the drum and configured to generate power from magnetic field formed by the transmission coil; drive modules driven by power of the reception coil and provided in the drum; and at least one balancing weight that moves along a circumference of the drum by a driving force of each drive module, and changes a center of gravity of the drum. The controller determines a position of the balancing weights based on the input current value when the drum rotates.

A laundry treatment device according to an embodiment of the present invention includes: a cabinet; a drum accommodated in the cabinet; a tub configured to accommodate the drum; and a dynamic absorber provided to absorb oscillation of the cabinet, wherein the dynamic absorber includes: a support plate coupled to the cabinet; and a moving mass placed movably on the support plate to absorb oscillation transferred to the cabinet, and a partition wall configured to partition a top surface of the support plate, on which the moving mass is placed, into a first accommodation part and a second accommodation part protrudes from the top surface of the support plate.