Air conditioner and method of controlling air conditioner

An air conditioner comprising:

• a first heat exchanger disposed in an indoor space;
• a second heat exchanger disposed in an outdoor space;
• a water injection module disposed to be adjacent to the second heat exchanger, the water injection module including a flow adjustment valve adjusting supply of water to the second heat exchanger;
• a fluid tube connected to the first heat exchanger and the second heat exchanger;
• a compressor and an expansion valve disposed on the fluid tube;
• a flow path switching valve changing a path of fluid discharged from the compressor to allow the fluid to flow toward one of the first heat exchanger and the second heat exchanger;
• an outdoor fan forming a flow of air passing through the second heat exchanger, the outdoor fan connected to the processor;
• a processor connected to the flow adjustment valve and the flow path switching valve;
• and
• a storage unit connected to the processor,
• wherein the storage unit includes a program changing a heating mode in which the flow adjustment valve is closed such that the first heat exchanger operates as a condenser and the second heat exchanger operates as an evaporator, and the flow path switching valve performs adjustment to allow the fluid from the compressor to flow toward the first heat exchanger, and a cooling mode in which the flow adjustment valve is opened such that the first heat exchanger operates as the evaporator and the second heat exchanger operates as the condenser, and the flow path switching valve performs adjustment to allow the fluid from the compressor to flow toward the second heat exchanger,
• wherein the program is set such that a minimum air volume of the outdoor fan in the heating mode is greater than a minimum air volume of the outdoor fan in the cooling mode.