Air conditioner capable of controlling heating and humidity, and control method therefor

A method for controlling an air conditioner including a first air flow path (111, 113, 115) provided to communicate with an indoor area, the first air flow path including a first inlet and a first outlet, both the first inlet and first outlet of the first air flow path being provided in the indoor area, a second air flow path (310) provided to communicate with an outdoor area, the second air flow path including a second inlet and a second outlet, both the second inlet and second outlet of the second air flow path being provided in the outdoor area, a third air flow path (410, 115) including a third inlet provided in the outdoor area and the first outlet provided in the indoor area, the third air flow path (410, 115) including a path common to both the first air flow path (111, 113, 115) and the third air flow path (410, 115), and a dehumidifying rotor (200) including a first region (210) provided along the path common to both the first air flow path (111, 113, 115) and the third air flow path (410, 115), a second region (220) provided along the second air flow path (310), and an adsorbing material which alternately passes through the first region (210) and the second region (220) according to rotation of the dehumidifying rotor (200) and adsorbs moisture in the first region (210) or the second region (220), wherein the first air flow path (111, 113, 115) includes a first inlet flow path (111, 113) configured to connect the first inlet through which air in the indoor area is introduced and an inlet end of the first region (210), and a first outlet flow path (115) configured to connect an outlet end of the first region (210) and the outlet through which the air is discharged to the indoor area;

• and an extraction flow path (112, 114) is branched from the first inlet flow path (111, 113) at a first point between the first inlet and the first outlet of the first air flow path (111, 113, 115) and connected to the second air flow path (310) at a second point between the second inlet and the second outlet of the second air flow path (310) such that air introduced from the indoor area flows to the second region (220), the extraction flow path (112, 114) providing an air passage from the first air flow path (111, 113, 115) to the second air flow path (310), the method comprising:
• controlling, by a control unit, such that air flowing in the first air flow path (111, 113, 115) is heated by a heater (140, 180), and at this point, supply moisture to indoor air introduced through the first air flow path and flowing toward the second region (220) in the second air flow path (310) by a moisture supplier, and moisture of air passing through the second region (220) in the second air flow path (310) to flow to the first region (210) in the first air flow path (111, 113, 115) and is evaporated in the first region (210) by rotation of the dehumidifying rotor (200) and introduced into the indoor area with the heated air to humidify the indoor area.