Abstract: Cross-flow fan is the core air supply component of cross-flow air conditioner, and its structural performance directly affects the reliability of the whole air conditioner. Therefore, it is necessary to study the strength and fatigue life analysis of cross-flow fan of cabinet machine. The finite element model of single-section cross-flow fans with different fan blade lengths were established, and the static strength of cross-flow fans were obtained by finite element analysis method. Based on this, Abaqus/Fe-safe software was applied, based on the S-N curve of materials and the Goodman average stress correction method was used to predict the fatigue life of cross-flow fans, and the influence of the blade length of cross-flow fans on the structural strength and fatigue life of the fan was summarized. It is known that the comprehensive performance is better when the single blade length is about 60 mm. At the same time, the fatigue life analysis method can save a lot of experimental time and cost of cross-flow fans, which provides an effective reference for engineering design.

Key words: Cross-flow fan, Finite element analysis, Static strength, Fatigue life calculation