Air conditioning system and method for controlling same

An air conditioning system for air conditioning of indoor space, comprising an indoor unit body, the indoor unit body comprising a cavity;

• the air conditioning system further comprises at least one return air inlet connecting the indoor space to the cavity, the at least one return air inlet comprising a first return air inlet;
• wherein the indoor unit body is located in an upper part of the indoor space, and the first return air inlet is located at a lower part of the indoor space;
• the at least one return air inlet further comprises a second return air inlet located in the upper part of the indoor space, and the air conditioning system further comprises a first switch device, the first switch device connecting the cavity to at least one of the first return air inlet and the second return air inlet;
• the first switch device comprises a first partition arranged between a first port and a second port and a first baffle hinged to the first partition;
• the first baffle is rotatable;
• the air conditioning system further comprises an exhaust duct, and the exhaust duct connects the second return air inlet to an outdoor space;
• the air conditioning system further comprises a second switch device, the second switch device comprises a second baffle, and the second baffle is rotatable and hinged to one side edge of the exhaust duct;
• the second baffle is configured to:
• when driven to abut against another side edge of the exhaust duct opposite to the one side edge, the second baffle closes the exhaust duct so that the second return air inlet is not in communication with the exhaust duct;
• and when driven to abut against the first partition, the second baffle opens the exhaust duct so that the second return air inlet communicates with the exhaust duct, and that the second return air inlet is not communication with an air inlet;
• and
• the air conditioner system is further configured to communicate with only the second return air inlet during a cooling operation and communicate with only the first return air inlet during a heating operation.