Air-cooling is where the air-cooled heat pump is a central air-conditioning unit that uses air as the cold (heat) source and water as the cold (heat) medium. As an integrated equipment for both cold and heat sources, the air-cooled heat pump eliminates many auxiliary parts such as cooling towers, water pumps, boilers and corresponding piping systems. The system has simple structure, saves installation space, convenient maintenance and management, and saves energy, especially suitable for areas lacking water resources.