Laundry treatment machine
AssigneeLG Electronics Inc.
InventorsChangyoung CHEON, Jihoon KIM, Junho PARK
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 includes: an inverter converting a direct current (DC) voltage from a converter into an alternating current (AC) voltage based on a switching operation and outputting the converted AC voltage to a circulation pump motor; and a controller to control a speed of the circulation pump motor to be increased before a time point at which a speed of a washing tub motor increases. Accordingly, the washing tub motor and the circulation pump motor can be operated in synchronization with each other. As a result, it is possible to improve washing power based on circulation pumping during washing.
Claims19
A laundry treatment machine comprising:
- a washing tub;
- a washing tub motor to rotate the washing tub;
- a circulation pump to circulate wash water introduced from the washing tub by pumping;
- a circulation pump motor to operate the circulation 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 circulation pump motor;
- and
- a controller to control a speed of the circulation pump motor to be gradually increased before a time point at which a speed of the washing tub motor increases,
- wherein the speed of the circulation pump motor is changed before the time point at which the speed of the washing tub motor increases.
A laundry treatment machine comprising:
- a washing tub;
- a washing tub motor to rotate the washing tub;
- a circulation pump to circulate wash water introduced from the washing tub by pumping;
- a circulation pump motor to operate the circulation 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 circulation pump motor;
- and
- a controller to control a speed increase period of the circulation pump motor to be synchronized in response to a speed increase period of the washing tub motor,
- wherein the controller controls a speed of the circulation pump motor to be gradually increased in response to the speed increase period of the washing tub motor.
A circulation pump driving apparatus comprising:
- a circulation pump to circulate wash water introduced from an inner tub by pumping;
- a circulation pump motor to operate the circulation 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 circulation pump motor;
- and
- a controller to control a speed of the circulation pump motor to be gradually increased before a time point at which a speed of an inner tub motor increases,
- wherein the speed of the circulation pump motor is changed before the time point at which the speed of the inner tub motor increases.
Dependencies are inferred from the claim text.