Air conditioning system

An air conditioning system, comprising:

• at least one first air conditioner provided in a first space and configured to
• suck air exhausted from a high-heat-generation type information technology (IT) rack which generates higher heat than heat generated by other IT racks, the high-heat generation type IT rack and other IT racks respectively arranged in the first space and housing at least one information processor,
• cool down the sucked air, and
• exhaust the cooled air to the high-heat-generation type IT rack;
• and
• a second air conditioner provided in a second space, the second space being divided from and communicated with the first space via a first opening allowing continuous air ventilation and a second opening allowing continuous air ventilation, and configured to cool down the at least one information processor housed in the high-heat generation type IT rack and the other IT racks arranged in the first space by cooling down air exhausted from the first space via the first opening and exhausting the cooled air back to the first space via the second opening while operating at a reserved cooling capacity,
• wherein the first air conditioner includes:
• a suction unit that sucks air exhausted from an information processor housed in the high-heat-generation type IT rack;
• a cooling unit that cools down the air sucked by the suction unit;
• an exhaust unit that exhausts the air cooled down by the cooling unit;
• and
• at least one controller that
• acquires a cooling state of the cooling unit,
• determines, based on the acquired cooling state, whether a thermal load of the cooling unit exceeds a cooling capacity of the cooling unit, and
• reduces a volume of air exhausted by the exhaust unit by a volume corresponding to the reserved cooling capacity of the second air conditioner in response to the thermal load of the cooling unit exceeding the cooling capacity of the cooling unit, and
• wherein the second air conditioner cools down the sucked air by the first air conditioner using the reserved cooling capacity of the second air conditioner when the at least one controller of the first air conditioner reduces the volume of the air exhausted by the exhaust unit of the first air conditioner.