A control method of a laundry treatment apparatus is disclosed. The control method includes rotating the drum at a predetermined first number of rotations to measure the weight of the laundry stored in the drum (a laundry weight measurement step), rotating the drum at a predetermined second number of rotations to determine the magnitude of the dynamic unbalance of the drum (an unbalance measurement step), accelerating the drum to a target number of rotations, which is greater than the first number of rotations and the second number of rotations, when the magnitude of the dynamic unbalance measured at the unbalance measurement step is less than a predetermined reference value (an acceleration step), interrupting the rotation of the drum when the variation per unit time of current supplied to the stator during execution of the acceleration step is equal to or greater than a predetermined reference variation (a first interruption step), rotating the drum at the first number of rotations to determine the weight of the laundry stored in the drum (a laundry weight remeasurement step), and interrupting the rotation of the drum when the deviation between the laundry weight measured at the laundry weight remeasurement step and the laundry weight measured at the laundry weight measurement step is equal to or greater than a predetermined reference deviation (a second interruption step).

A control method of a laundry treating apparatus includes rotating a drum at a reference rotational speed that is lower or higher than a resonance rotational speed of the laundry treating apparatus; measuring the maximum displacements of tub front and rear surfaces and a phase difference between the maximum displacements during the rotation of the drum at the reference rotational speed; determining a front unbalance (UB) mass located in a drum front area, a rear UB mass located in a drum rear area, and an angle between the UB masses based on the maximum displacements and the phase difference; and accelerating a drum rotational speed to a target rotational speed that is higher than the reference rotational speed and the resonance rotational speed, when the front and rear UB masses are in a preset allowable mass range and an angle between the UB masses is in an allowable angle range.

A method controls a laundry washing machine (1) including: a casing (2), a washing tub (3) arranged within the casing (2), a rotatable laundry drum (4) which is mounted inside the washing tub (3) and is designed to contain laundry (10), a water-detergent supply system (5,6) designed to supply wash water and detergent into the washing tub (3), and a motor assembly to rotate the laundry drum (4). The method includes the steps of: performing a wash phase, in which a predetermined intermediate spin is performed in a standard way, or skipped, or performed in a modified way, based on one or more detected phase conditions; performing at least a rinse phase, in which a predetermined intermediate spin is performed in a standard way, or skipped, or performed in a modified way, based on one or more detected phase conditions; performing a detection of whether, in a previous wash phase or rinse phase, a predetermined intermediate spin was performed in a standard way, or skipped, or performed in a modified way and, based on the detection, performing a following rinse phase adapted to said detection and/or adding a rinse phase to be performed.

A laundry treating appliance for treating a laundry load according to at least one cycle of operation and a method of operating a laundry treating appliance to control the rotation of the drum to distribute the laundry load with an acceptable amount of imbalance such that the laundry treating appliance may be operated in an effective and efficient manner.

Provided is a control method for a laundry treating apparatus comprising: a drum in which laundry is stored; at least three balancers fixed to the drum and provided to be spaced from each other at the same angle with respect to the rotational center of the drum; front spaces provided in each balancer and positioned at the front of the drum; and rear spaces provided in each balancer and positioned at the rear of the drum, wherein the control method for the laundry treating apparatus comprises: a rear control step of supplying a liquid to at least one of the rear spaces so as to increase the weight of a quadrant (first target quadrant) positioned in the direction opposite to a quadrant, of a circumferential surface of the drum, to which a force causing unbalance is directed; and a front control step of supplying a liquid to at least one of the front spaces so as to increase the weight of a quadrant (second target quadrant) positioned in the direction opposite to the quadrant, of the circumferential surface of the drum, to which the force causing unbalance is directed.

Disclosed herein is a drain pump driving apparatus and a laundry treatment machine including the same. The drain pump driving apparatus and the laundry treatment machine including the same according to an embodiment of the present invention include a motor to operate the drain pump, an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation and output the converted AC power to the motor, an output current detector to detect an output current flowing to the motor, and a controller to control the inverter, wherein the controller may calculate a speed ripple of the motor based on the output current and performs a control operation based on the calculated speed ripple of the motor to change a speed of the motor.

A dynamic imbalance detection system capable of whether a washing machine is in a dynamically imbalanced position by using big data and executing an AI algorithm or a machine learning algorithm in a 5G communications network environment built for IoT. The system includes a washing machine and a server communicating with the washing machine. The washing machine includes a vibration sensor attached to a washing machine cabinet and a controller receiving a vibration signal detected by the vibration sensor during the operation of the washing machine and processing the vibration signal into vibration data. The server receives the vibration data from the controller and trains a machine learning algorithm on a training dataset that is obtained by processing one or more features among a displacement magnitude, a displacement ratio, and a displacement phase, and determines result values of dynamic balance and dynamic imbalance labeled with the one or more features.

A method for controlling a laundry treating apparatus is disclosed. In a washing step, the presence or absence of entangled laundry is detected using at least one of a vibration value of a drum, a current value applied to a drive unit, and an RPM value of the drum, and a step of untangling the entangled laundry is performed using at least one of a vibration value of a drum, a current value applied to a drive unit, and an RPM value of the drum.

A laundry treating apparatus includes a cabinet, a tub, a drum, a water supply, a drain, a rotator rotatably disposed on a bottom surface of the drum, and a controller that controls rotation of the rotator. The rotator includes a bottom portion positioned on the bottom surface, a pillar protruding from the bottom portion toward an open surface, and a blade including a plurality of blades disposed to be spaced apart from each other along a circumferential direction of the pillar. The blade extends from the bottom portion toward the open surface in an inclined direction with respect to a longitudinal direction of the pillar. The rotator performs a first rotation for generating an ascending water flow and a second rotation for generating a descending water flow. The controller controls the rotator to alternately repeat the first rotation and the second rotation.

In accordance with one aspect of the present disclosure, a washing machine includes a rotating tub configured to accommodate laundry, a water supply pipe configured to spray water over a surface of the laundry. The washing machine also includes a controller configured to execute a water supply cycle in which an operation of each of the rotating tub and the water supply pipe is controlled and water is supplied to the rotating tub. The washing machine further includes a wash cycle in which the laundry is washed and the controller executes a first cycle in which the rotating tub is rotated faster than a rotational speed in the wash cycle so as to discharge air contained inside the laundry before the wash cycle is terminated.