Patent ID: 8974194
Filing Date: 2015-03-10
Classification: F04D

Abstract:
1. An impeller of an advection-type fan comprising: a metal base plate comprising a shaft-coupling portion and a peripheral portion distant from the shaft-coupling portion, wherein a first plane facing in a first direction and a second plane facing in a second direction opposite to the first direction are arranged between the shaft-coupling portion and the peripheral portion, wherein the metal base plate is in a plane form between the shaft-coupling portion and the peripheral portion, and wherein the first plane is provided with a permanent magnet; a shaft having a fixing end and a free end distant from the fixing end, wherein the fixing end is coupled with the shaft-coupling portion of the metal base plate, and wherein the free end extends axially in the first direction; and a plurality of plastic blades each having a coupling portion and an air-driving portion, wherein the coupling portion is coupled with the peripheral portion of the metal base plate, wherein the air-driving portion axially extends in the second direction, and wherein the metal base plate further comprises a plurality of through-holes extending through the first and second planes, with a rib formed between two adjacent through-holes.