This series of DC forward multi-wing external rotor centrifugal fan products, with single air intake and double air intake two types, single air specification models cover the diameter range of F120 to F180, the volume flow up to 950mˆ3/h, the maximum static pressure to 430Pa; Dual air intake specification models cover the diameter range from F120S to F146S; The series of external rotor fan products have the main features of compact structure, reliable operation, energy saving and high efficiency, low noise and easy installation. Products are widely used in fresh air purification, household appliances and other industries; This series of products has two EC/DC sub-series, DC series directly input 12VDC/24VDC/48VDC/310VDC power supply; EC series fan input 115VAC/230VAC/380VAC power supply; The adoption of DC motor (EC/DC) makes the fan have higher efficiency, and the products pass the EU ErP energy efficiency requirements, the fan is more freely controlled, and can flexibly meet the needs of customers; Dunli DC motor can provide a variety of control schemes and protection functions to achieve intelligent control and energy saving and environmental protection.