Washing machine and control method of washing machine

A control method of a washing machine including a drum rotating about a horizontal rotation axis in a tub and a plurality of nozzles spraying water discharged from the tub and circulated by a pump into the drum, wherein the control method comprising:

• (a) step of performing a first drum operation of supplying water by a first set amount together with a detergent into the tub and rotating the drum at a first drum rotation speed, while water is supplied, at least once and operating the pump at a first pump rotation speed at least once during the first drum operation;
• (b) step of operating a heater to heat water in the tub, performing a second drum operation of rotating the drum at the first drum rotation speed during the operation of the heater at least once, and operating the pump at a second pump rotation speed at least once during the second drum operation;
• and
• (c) step of stopping the operation of the heater, performing a third drum operation of rotating the drum at the first drum rotation speed at least once, and operating the pump at the first pump rotation speed at least once during the third drum operation.

A control method of a washing machine including a drum rotating about a horizontal rotation axis in a tub and a plurality of nozzles spraying water discharged from the tub and circulated by a pump into the drum, wherein the control method comprising:

• (a) detecting the amount of laundry introduced into the drum;
• and
• (b) performing a first washing mode when the detected amount of laundry is a first laundry amount, and performing a second washing mode when the detected amount of laundry is a second laundry amount,
• wherein the first washing mode includes:
• (c-1) a step of supplying water by a first set amount together with a detergent into the tub, performing a first drum operation of rotating the drum at a first drum rotation speed, while water is supplied, at least once, and operating the pump at a first pump rotation speed at least once during the first drum operation;
• (c-2) a step of operating a heater to heat water in the tub, performing a second drum operation of rotating the drum at the first drum rotation speed at least once during the operation of the heater, and operating the pump at a second pump rotation speed during the second drum operation;
• and
• (c-3) a step of performing a third drum operation of rotating the drum at the first drum rotation speed at least once and operating the pump at the first pump rotation speed at least once during the second drum operation, and
• the second washing mode includes:
• (d-1) a step of supplying water by a first set amount together with a detergent into the tub, performing a first drum operation of rotating the drum at the first drum rotation speed at least once, while water is supplied, and operating the pump at a first pump rotation speed at least once during the first drum operation;
• (d-2) a step of operating the heater to heat water in the tub, performing a second drum operation of rotating the drum at the first drum rotation speed at least once during the operation of the heater, and operating the pump at a second pump rotation speed at least once during the second drum operation, for a time longer than (c-2);
• and
• (d-3) a step of stopping the operation of the heater, performing a third drum operation of rotating the drum at the first drum rotation speed at least once, and operating the pump at the first pump rotation speed at least once during the second drum operation, for a time longer than that in step (c-3),
• wherein a ratio of a stop time of the drum to a rotation time of the drum is greater than that of the case of the step (c-3).