Method and apparatus for injecting water to an outdoor heat exchanger of an air conditioner

An air conditioner comprising:

• an outdoor unit comprising:
• an outdoor heat exchanger;
• and
• an injection device configured to inject water to the outdoor unit, the injection device including:
• a water tank configured to store water,
• a nozzle configured to inject the water stored in the water tank to the outdoor heat exchanger,
• a communication interface,
• a memory storing at least one instruction, and
• at least one processor configured to execute the at least one instruction to:
• obtain, through the communication interface, state information transmitted by the outdoor unit, wherein the obtained state information includes compressor operating frequency of the outdoor unit, and
• control a water injection operation of the nozzle to inject water stored in the water tank to the outdoor heat exchanger, in accordance with the compressor operating frequency of the outdoor unit included in the obtained state information, such that
• as the compressor operating frequency of the outdoor unit increases, the injection device increases a water injection time period or decreases a water injection cycle to increase an amount of water injection, and,
• as the compressor operating frequency of the outdoor unit decreases, the injection device decreases the water injection time period or increases the water injection cycle to decrease the amount of water injection.