Impeller and cooling fan incorporating the same
AssigneeFoxconn Technology Co., Ltd.
InventorsChing-Bai Hwang, Po-Hsuan Kuo
Life of this patent
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Abstract
A cooling fan includes a housing, a cover arranged on the housing, and an impeller received in a space formed between the housing and the cover. The impeller includes a hub and a plurality of blades extending radially and outwardly from the hub. Each of the blades includes a windward surface and a leeward surface opposite to the windward surface. A porous layer is disposed on the leeward surface of each of the blades, adjacent to a free end thereof. The porous layer has one side surface attached to the leeward surface and an opposite side surface facing the windward surface of an adjacent blade.
Claims13
An impeller for an electrical fan for cooling electronic components, comprising:
- a hub;
- a plurality of blades extending radially and outwardly from the hub, each of the blades comprising a windward surface and a leeward surface opposite to the windward surface;
- and
- a porous layer disposed on the leeward surface of each of the blades adjacent to a free end thereof, the porous layer having one side surface attached to the leeward surface and an opposite side surface facing the windward surface of an adjacent blade;
- wherein the porous layer comprises an outer side away from the hub, the outer side being aligned with an outer edge of the free end of the corresponding blade to which the porous layer is attached, and an inner side adjacent to the hub, the inner side being inclined, slanting rearwards toward the corresponding blade to thereby have a smooth connection with the corresponding blade.
A cooling fan comprising:
- a housing;
- a cover on the housing;
- and
- an impeller received in a space defined between the housing and the cover, the impeller comprising a hub and a plurality of blades extending radially and outwardly from the hub, each of the blades comprising a windward surface and a leeward surface opposite to the windward surface, a porous layer disposed on the leeward surface of each of the blades adjacent to a free end thereof, the porous layer having one side surface thereof attached to the leeward surface and an opposite side surface thereof facing the windward surface of an adjacent blade;
- wherein the porous layer comprises an outer side away from the hub, the outer side being aligned with an outer edge of the free end of the corresponding blade to which the porous layer is attached, and an inner side adjacent to the hub, the inner side being inclined, slanting rearwards toward the corresponding blade to thereby have a smooth connection therewith.
Dependencies are inferred from the claim text.