Patent ID: 8297950
Filing Date: 2012-10-30
Classification: F04D

Abstract:
1. A fan comprising, in combination: a housing having a first side and a second side spaced from the first side along an axis, wherein the housing includes a peripheral wall extending from the first side to the second side along the axis, wherein the peripheral wall has an inner periphery and an outer periphery, wherein the inner periphery extends from the first side to the second side to define a cylindrical compartment, wherein a shaft seat is provided in the cylindrical compartment, wherein the peripheral wall includes a wire-guiding slot in communication with the cylindrical compartment, wherein the outer periphery has quadrilateral cross sections including four faces, wherein the housing has a radial thickness between the inner and outer peripheries of the peripheral wall, said radial thickness being largest at positions where adjacent faces of the outer periphery connect to each other, and wherein the wire-guiding slot extends from the inner periphery to the outer periphery at one of the positions where adjacent faces of the outer periphery connect to each other; an impeller including a hub, a shaft, and a permanent magnet, wherein both of the shaft and the permanent magnet are mounted to the hub, wherein the shaft is rotatably coupled to the shaft seat about an axis; a plurality of circumferentially spaced connecting members extending along radial lines from the axis and linking the shaft seat and the peripheral wall at the first side of the housing, wherein one of the plurality of circumferentially spaced connecting members extends along a corresponding radial line from the axis to the peripheral wall and is aligned with the wire-guiding slot of the housing, wherein the wire-guiding slot extends parallel to the corresponding radial line, wherein the wire-guiding slot extends through housing from the second side towards the first side and ends at a position where the one of the plurality of circumferentially spaced connecting members meets the peripheral wall, and wherein the wire-guiding slot is spaced from the first side of the housing; a base coupled to the housing, wherein the base includes a coil unit and a connection port electrically connected to the coil unit; and a power line having an end connected with the connection port of the base and extending from the connection port along the one of the plurality of circumferentially spaced connecting members, the wire-guiding slot, and the corresponding radial line beyond the housing, wherein the permanent magnet has a magnet face facing the coil unit.