We have developed high-efficiency heat exchange fans for central air conditioning and ground source heat pump systems. The air-conditioning box fan with ternary flow impeller design has an air volume of 200,000 m³/h, which can be steplessly adjusted from 0-100% with the frequency converter; the cross-flow fan for heat pumps has an optimized COP of 4.2 through the optimization of the reverse airflow organization,and the innovative magnetic levitation centrifugal fan with a rotational speed of 100，000 rpm can be used in large-scale commercial heat pump units,which can achieve an energy saving of more than 40%， and meet the cooling and heating needs of hotels，shopping malls,and other venues. The innovative magnetic levitation centrifugal fan with a rotational speed of 100,000 rpm can be used in large commercial heat pump units to achieve energy savings of over 40% and meet the cooling and heating needs of hotels, shopping malls,etc.