Patent ID: 9022754
Filing Date: 2015-05-05
Classification: F04D

Abstract:
1. A fan impeller structure comprising an annular body which rotates around an axis, the annular body having a top section extending from one end of the annular body, a plurality of radially spaced first bending sections formed between the top section and the annular body, the top section having a plurality of recesses formed between consecutive first bending sections, a plurality of flow guide holes formed between the first bending sections and the recesses; wherein a plurality of radially spaced second bending sections are further formed between the top section and the annular body; wherein additional recesses of the top section are formed between consecutive second bending sections, and additional flow guide holes are formed between the second bending sections and the additional recesses; and wherein the first bending sections are arranged closer to the axis than the second bending sections.