Laundry treating apparatus and method for controlling the laundry treating apparatus

A method for controlling a laundry treating apparatus, wherein the laundry treating apparatus comprises:

• a drum having a laundry storage space defined therein;
• a duct defining a channel for supplying air discharged from the drum back to the drum;
• a fan to move air along the duct;
• a heat-absorber for removing moisture from air introduced into the duct;
• a heat-emitter disposed inside the duct to heat air passing through the heat-absorber;
• a water collector for storing therein water discharged from air passing through the heat-absorber;
• a first filter for filtering air flowing from the drum to the duct;
• a second filter positioned between the first filter and the heat-absorber and filtering air passing through the first filter;
• a water discharger having a water storage space defined therein;
• a water discharger supply pipe for supplying water stored in the water collector to the water discharger;
• a water ejector for ejecting water into at least one of the second filter or the heat-absorber;
• a water ejector supply pipe for supplying water stored in the water collector to the water ejector;
• a water supply pipe configured to connect the water discharger and the water collector to each other;
• a water supply valve for controlling opening and closing of the water supply pipe, the method comprising:
• a fan operation in which the fan causes air to move along the duct;
• a pressure measurement operation in which a pressure sensor located between the first filter and the second filter measures a pressure inside the duct during the fan is operation;
• a cleaning request operation in which when the pressure measured by the pressure sensor is lower than a predefined reference pressure, a message requesting cleaning of the first filter is output via at least one of a display panel or a speaker;
• and
• a cleaning operation in which when the pressure measured by the pressure sensor is greater than or equal to the reference pressure, the water ejector ejects the water to at least one of the second filter or the heat-absorber.