Portable fan

Abstract

A portable fan, including: a housing, a mixed-flow fan, and a booster. An air inlet portion is arranged at a rear side of the housing, an air outlet portion is arranged at a front side of the housing, the air inlet portion and the air outlet portion are fluidly communicated to each other through an interior of the housing. The mixed-flow fan is arranged inside the housing; the mixed-flow fan is configured to rotate around a rotation shaft to generate an airflow. The booster is disposed inside the housing and surrounds an outer periphery of the mixed-flow fan. The booster includes a booster surface facing the mixed-flow fan; a radial size of at least part of the booster surface gradually increases in a direction from the rear side to the front side; a gap is formed between the booster and the housing.

Dependencies are inferred from the claim text.