Radiating unit device for air cooling island of direct air cooling unit

A radiating unit device for an air cooling island of a direct air cooling unit comprises a steam distribution pipe, a radiating fin tube bundle, a condensation water recycle pipe and a cooling fan which are arranged from top to bottom. After improvement, a swirl ventilation device arranged at the position of an outlet of the cooling fan comprises an inner cylinder, an outer cylinder and swirl vanes, the inner cylinder and the outer cylinder are arranged coaxially, the swirl vanes are evenly distributed in an annular area between the inner cylinder and the outer cylinder along the circumferential direction, two ends of each swirl vane are fixedly connected with the inner cylinder and the outer cylinder respectively, a dip angle alpha between each swirl vane and the axis of the inner cylinder ranges from 15 degrees to 75 degrees, and all swirl vanes are identical in oblique directions. The swirl ventilation device mounted at the position of the outlet of the cooling fan plays a swirl guide role in air passing t