Ventilation system, integrated air conditioning system and control method thereof

A control method of an integrated air conditioning system comprising an outdoor unit, a refrigerant distributor configured to distribute a refrigerant supplied from the outdoor unit to an indoor unit and a ventilation device, the ventilator including a humidity sensor to detect an indoor humidity, a first blower to flow outdoor air along an inlet flow path, the inlet flow path configured to guide the outdoor air to an indoor space, a second blower to flow indoor air along an outlet flow path, the outlet flow path configured to guide the indoor air to an outdoor space, a first heat exchanger in the inlet flow path and connected to the outdoor unit, a second heat exchanger in the inlet flow path and connected to the first heat exchanger;

• the indoor unit including:
• a temperature sensor to detect the indoor temperature and an indoor heat exchanger, the indoor unit configured to discharge heat-exchanged air into the indoor space;
• and a controller, the control method comprising:
• obtaining the indoor temperature from the temperature sensor of the indoor unit;
• obtaining the indoor humidity from the humidity sensor of the ventilator;
• controlling the refrigerant distributor to supply the refrigerant to the indoor unit based on the detect indoor temperature;
• and
• controlling the refrigerant distributor to supply the refrigerant to the ventilator based on the detect indoor temperature and the detected indoor humidity.