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 washing machine includes a tub to receive water; a drain pump connectable to the tub and configured to discharge the water from the tub, and a filter assembly to filter the discharged water from the drain pump. The filter assembly includes a filter housing, a filter couplable to the filter housing and configured to rotate within the filter housing, the filter including a first filter structure to collect foreign substance from the discharged water from the drain pump and a second filter structure to collect other foreign substances having a size different from foreign substance collected in the first filter structure from the discharged water from the drain pump, and a filter driver to rotate the filter.

A washing machine includes a tub to receive water; a drain pump connectable to the tub and configured to discharge the water from the tub, and a filter assembly to filter the discharged water from the drain pump. The filter assembly includes a filter housing, a filter couplable to the filter housing and configured to rotate within the filter housing, the filter including a first filter structure to collect foreign substance from the discharged water from the drain pump and a second filter structure to collect other foreign substances having a size different from foreign substance collected in the first filter structure from the discharged water from the drain pump, and a filter driver to rotate the filter.

A cleaning method includes sensing at least one trigger, where the at least one trigger is chosen from sensing a presence of a first liquid within a wash compartment of an appliance with a liquid sensor and sensing an elapsed time from activation of a faucet of the appliance with a timer. The cleaning method also includes draining the first liquid from the wash compartment of the appliance. Additionally, the cleaning method includes rinsing the wash compartment with a second liquid. The draining of the first liquid from the wash compartment of the appliance and the rinsing of the wash compartment with a second liquid are both performed prior to initiating a wash cycle of the appliance.

A cleaning method includes sensing at least one trigger, where the at least one trigger is chosen from sensing a presence of a first liquid within a wash compartment of an appliance with a liquid sensor and sensing an elapsed time from activation of a faucet of the appliance with a timer. The cleaning method also includes draining the first liquid from the wash compartment of the appliance. Additionally, the cleaning method includes rinsing the wash compartment with a second liquid. The draining of the first liquid from the wash compartment of the appliance and the rinsing of the wash compartment with a second liquid are both performed prior to initiating a wash cycle of the appliance.

The present disclosure relates to a method for controlling a garment processing device, the method comprising: a foreign-material separating step of rotating a drum rotatably provided inside a tub that stores water such that friction occurs between garments inside the drum and the water; a drain step of discharging the water inside the tub to the outside of the tub; a first maintenance step of maintaining the rate of rotation of the drum, after same has reached a preconfigured first rate, at the first rate; a first measurement step of measuring the degree of imbalance occurring in the drum while the drum rotates at the first rate; a second maintenance step of increasing the rate of rotation of the drum to a predetermined second rate, if a first measured value measured in the first measurement step is equal to/below a preconfigured first reference value, and then maintaining same at the second rate; a second measurement step of measuring the degree of imbalance occurring in the drum while the drum rotates at the second rate; stopping the drum from rotating if a second measured value measured in the second measurement step is equal to/below a preconfigured second reference value; and a dewatering step of accelerating the drum to a third rate configured to be higher than the second rate, thereby removing water from the garments. The dewatering step is stopped if the degree of imbalance of the drum measured during the drum is accelerated to the third rate is larger than a predetermined imbalance reference value, and the imbalance reference value is configured on the basis of the second measured value.

The present disclosure relates to a method for controlling a garment processing device, the method comprising: a foreign-material separating step of rotating a drum rotatably provided inside a tub that stores water such that friction occurs between garments inside the drum and the water; a drain step of discharging the water inside the tub to the outside of the tub; a first maintenance step of maintaining the rate of rotation of the drum, after same has reached a preconfigured first rate, at the first rate; a first measurement step of measuring the degree of imbalance occurring in the drum while the drum rotates at the first rate; a second maintenance step of increasing the rate of rotation of the drum to a predetermined second rate, if a first measured value measured in the first measurement step is equal to/below a preconfigured first reference value, and then maintaining same at the second rate; a second measurement step of measuring the degree of imbalance occurring in the drum while the drum rotates at the second rate; stopping the drum from rotating if a second measured value measured in the second measurement step is equal to/below a preconfigured second reference value; and a dewatering step of accelerating the drum to a third rate configured to be higher than the second rate, thereby removing water from the garments. The dewatering step is stopped if the degree of imbalance of the drum measured during the drum is accelerated to the third rate is larger than a predetermined imbalance reference value, and the imbalance reference value is configured on the basis of the second measured value.

A method of monitoring drainage of a washing appliance such as a dishwasher or washing machine having a pump for draining a washing chamber is disclosed. The method includes receiving a time series of power consumption data relating to the operation of the washing appliance over a monitored period of operation including pumped draining of the washing chamber. A measure of the duration of a portion of the monitored period comprising said pumped draining is derived from the time series of power consumption data. The measure of duration is then compared to a reference value and an indicator of a drainage condition is determined based on the comparison. The method may be used to detect scaling or blockages in drainage flow paths.

A method of monitoring drainage of a washing appliance such as a dishwasher or washing machine having a pump for draining a washing chamber is disclosed. The method includes receiving a time series of power consumption data relating to the operation of the washing appliance over a monitored period of operation including pumped draining of the washing chamber. A measure of the duration of a portion of the monitored period comprising said pumped draining is derived from the time series of power consumption data. The measure of duration is then compared to a reference value and an indicator of a drainage condition is determined based on the comparison. The method may be used to detect scaling or blockages in drainage flow paths.

A washing appliance comprising a liquid container, a liquid level indicator unit configured to provide data indicative of a liquid level in the liquid container, a drain conduit, and a drain pump. The washing appliance further comprises a control arrangement configured to operate the drain pump during a first time period, control the drain pump to a standstill during a second time period following the first time period, and monitor a change of the liquid level during the second time period using data from the liquid level indicator unit. Also provided are a method of detecting an operational error in a washing appliance, a computer program, a computer-readable medium, and a control arrangement for a washing appliance.