Fan blade system with multiple spaced layers of blades and centrifugal fan using same
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United States of America Patent
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Dec 8, 2015
Grant Date -
Apr 10, 2014
app pub date -
Oct 9, 2012
filing date -
Oct 9, 2012
priority date (Note) -
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Abstract
A fan blade system with multiple spaced layers of blades and a centrifugal fan using same are disclosed. The centrifugal fan includes a housing, in which the fan blade system is mounted. The fan blade system includes a hub, and a first and a second blade group outward extended from a circumferential wall of the hub to axially space from each other. The housing includes a main housing portion and a secondary housing portion integrally formed on one side of the main housing portion. When the fan blade system is mounted in the housing, the two blade groups are separately located in the main housing portion and the secondary housing portion to produce higher airflow pressure and more air volume. With these arrangements, the centrifugal fan can have upgraded performance and be manufactured with reduced labor, time and material costs.
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