Air conditioning apparatus and method of controlling indoor pressure using same

An air conditioning apparatus comprising:

• an air supply fan to introduce air from outdoor to indoor;
• an exhaust fan to discharge air from the indoor to outdoor;
• a sensor among a plurality of sensors to detect an indoor carbon dioxide level, an outdoor fine dust level, and an indoor pressure;
• and
• a processor to control the air supply fan and the exhaust fan based on detected values transmitted from the sensor,
• wherein the processor controls the air supply fan and the exhaust fan in relation the detected values of the plurality of sensors that detect the indoor carbon dioxide level, the outdoor fine dust level, and the indoor pressure and the processor is configured to:
• based on detected levels associated with the detected values transmitted in association with the indoor carbon dioxide and the outdoor fine dust, control the air supply fan and the exhaust fan such that an air supply amount of the air supply fan is greater than an exhaust amount of the exhaust fan, and
• based on the detected indoor pressure being less than a first set value, control a number of revolutions per minute of the exhaust fan to be decreased, and based on the detected indoor pressure being greater than or equal to a second set value greater than the first set value, control the number of revolutions per minute of the exhaust fan to be increased.