Method for controlling laundry treatment apparatus

A method for controlling a laundry treatment apparatus which includes an upper treatment device that includes a drying drum to dry laundry, an upper driver to rotate the drying drum, a circulation passage unit through which air flows relative to the drying drum, a heat exchanger to dehumidify and heat the air, and a steam generator to supply steam to the drying drum;

• and a lower treatment device that includes a tub to store wash water, a washing drum provided in the tub, a tub heater to heat the wash water in the tub, and a lower driver to rotate the washing drum, the method comprising:
• performing, by the lower treatment device, a washing course that includes a water supply step, a washing step, and a dehydration step;
• and
• performing, by the upper treatment device, a drying course that includes a hot air supply step, a fan operation step, and a dryness sensing step,
• wherein the performing of the drying course by the upper treatment device includes changing at least one of a time of the drying course and a heat capacity generated by the heat exchanger based on an operational state of the washing course, and thereby performing the drying course.

A method for controlling a laundry treatment apparatus which includes an upper treatment device that includes a drying drum to dry laundry, an upper driver to rotate the drying drum, a circulation passage unit through which air flows relative to the drying drum, a heat exchanger to dehumidify and heat the air, and a steam generator to supply steam to the drying drum;

• and a lower treatment device that includes a tub to store wash water, a washing drum provided in the tub, a tub heater to heat the wash water in the tub, and a lower driver to rotate the washing drum, the method comprising:
• receiving selection of a washing course to be performed by the lower treatment device, the washing course includes a water supply step, a washing step, and a dehydration step;
• and
• determining an operational state of a drying course to be performed by the upper treatment device, the drying course includes a hot air supply step, a fan operation step, and a dryness sensing step, and
• changing operation of the washing course by changing at least one of an operation of the tub heater, an execution time of the washing course, and an operation of the lower driver based on the operational state of the drying course.