Fan blade
AssigneeDelta Electronics, Inc.
InventorsHsiu-Wei Wu, Heng-Yi Chen, Chin-Fu Lee, Wen-Tsao Lee, Wen-Shi Huang, Kuo-Chen Huang, Chieh-Lung Ho
Life of this patent
Estimating the term…
Abstract
An impeller is applied to a centrifugal fan and includes fan blades and a hub. Each fan blade includes a first portion and a second portion. The first portion is located relatively close to the hub and the first portion is coupled to the second portion. The first portion has a windward side and a leeward side, and the windward side is parallel to the leeward side. The second portion is located relatively far away from the hub. The second portion has a windward side and a leeward side, and the windward side and the leeward side are two curved surfaces with different specific curvatures.
Claims18
A fan blade, applied to an impeller having a hub, comprising:
- a first portion, located relatively close to the hub and having a first windward side and a first leeward side, wherein the first windward side is parallel to the first leeward side;
- and
- a second portion, located relatively far away from the hub;
- wherein the first portion is coupled to the second portion, and thickness of the second portion gradually increases or decreases along a direction of moving away from the hub;
- wherein the impeller further has an annular part for disposing the fan blade thereon, and a rib disposed and connected between the annular part and the hub.
An impeller, comprising:
- a hub;
- and
- a plurality of fan blades disposed around the hub, each of which has a first portion located relatively close to the hub and having a first windward side and a first leeward side, wherein the first windward side is parallel to the first leeward side, and a second portion, located relatively far away from the hub, coupled to the first portion and having a second windward side and a second leeward side;
- an annular part for disposing the fan blade thereon;
- and
- a connection portion disposed between the annular part and the hub.
An impeller, comprising:
- a hub;
- and
- a plurality of fan blades disposed around the hub, each of which has a first portion located relatively close to the hub and having a first windward side and a first leeward side, wherein the first windward side is parallel to the first leeward side, and a second portion, located relatively far away from the hub, coupled to the first portion and having a second windward side and a second leeward side;
- and
- a base horizontally extended from the hub, wherein the first portion and the second portion are vertically extended from the base.
Dependencies are inferred from the claim text.