| 摘要 |
A fan enabling increased air volume includes at least a fan wheel and a driving unit for driving the fan wheel to maintain a uniform rotating speed. The fan wheel includes a hub and a plurality of blades radially extended from an outer periphery of the hub. The blades may be arranged on the hub in different manners, such as having a preceding blade overlapped a following blade, or having a blade root installation angle smaller than 53° and a blade tip inclination angle smaller than 46°, or having a solidity of blade roots larger than 1.5 and a solidity of blade tips larger than 1, so that the fan wheel produces increased air volume and accordingly enhanced cooling power at the uniform rotating speed.
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