Fan housing for heat exchange tower fans

摘要

Heat exchange tower (10), comprising at least one fan (24) having fan blades with external tips that rotate in a rotation circle and a fan housing (26), comprising the fan housing (26) an outer ring structure (204) where a sound absorbing material (214) is mounted on the outer ring structure and is arranged radially inside the outer ring structure (204) and outside the rotation circle of the tips of the fan blades, where the outer ring structure (204) is formed by at least one molded section that includes at least two axially spaced cavities (222) and separated by a rib (223) in the middle of the cavities ( 222), with sound absorption material (214) arranged in each cavity (222).