Air-cooled heat pump units is also called the air-cooled screw units, air-cooled screw cold (hot) water units, widely used in hotels, shopping malls, office buildings, exhibition hall, airport, stadium and other public facilities are comfortable central air-conditioning system, and can meet the electronics, pharmaceutical, biotechnology, textile, chemical, metallurgical, pharmaceutical, electric power, machinery and other industries the manufacturability of different requirements of the air conditioning system.