Laundry treatment machine
AssigneeLG Electronics Inc.
InventorsJunsung Kim, Sungwan Kim, Chungill Lee
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a laundry treatment machine. A laundry treatment machine according to an embodiment of the present disclosure including an inverter to convert the DC voltage from the converter into an alternating current (AC) voltage based on a switching operation and to output the converted AC voltage to the drain motor; and a controller to control the drain motor to operate at any one of a first speed, a second speed less than the first speed, and a stop when the washing tub motor is accelerated. Accordingly, according to the operation of the washing tub motor, it is possible to efficiently drive the drain motor.
Claims15
A laundry treatment machine comprising:
- a washing tub;
- a washing tub motor to rotate the washing tub;
- a drain pump;
- a drain motor to operate the drain pump;
- a converter to output a direct current (DC) voltage;
- an inverter to convert the DC voltage from the converter into an alternating current (AC) voltage based on a switching operation and to output the converted AC voltage to the drain motor;
- and
- a controller configured to control the drain motor to operate at a first speed, a second speed less than the first speed, and a stop by changing a speed of the drain motor when the washing tub motor is accelerated,
- wherein the controller is configured to control the drain pump to gradually decrease the speed of the drain motor without stopping, before the washing tub motor is accelerated,
- wherein the controller controls the drain motor to rotate at the first speed, the second speed, and a third speed less than the first speed by changing the speed of the drain motor, before the washing tub motor is accelerated,
- wherein an amount of wash water flowing into the drain pump before the washing tub motor is accelerated is greater than an amount of wash water flowing into the drain pump when the washing tub motor is accelerated.
A laundry treatment machine comprising:
- a washing tub;
- a washing tub motor to rotate the washing tub;
- a drain pump;
- a drain motor to operate the drain pump;
- a converter to output a direct current (DC) voltage;
- an inverter to convert the DC voltage from the converter into an alternating current (AC) voltage based on a switching operation and to output the converted AC voltage to the drain motor;
- and
- a controller configured to control the drain motor to operate in a first mode operating at a plurality of speeds by changing a speed of the drain motor before the washing tub motor is accelerated, and to operate in a second mode operating at a plurality of speeds by changing the speed of the drain motor when the washing tub motor is accelerated,
- wherein a speed in the first mode is greater than a speed in the second mode,
- wherein the controller is configured to control the drain pump to gradually decrease the speed of the drain motor without stopping, before the washing tub motor is accelerated,
- wherein, after the acceleration of the washing tub motor, the controller controls the drain motor to operate in a third mode in which the drain pump is repeatedly turned on and off,
- wherein an amount of wash water flowing into the drain pump before the washing tub motor is accelerated is greater than an amount of wash water flowing into the drain pump when the washing tub motor is accelerated.
Dependencies are inferred from the claim text.