CENTRIFUGAL FAN WITH A MULTISTAGE IMPELLER
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United States of America Patent
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Issued Date -
Jan 10, 2013
app pub date -
Jul 7, 2011
filing date -
Jul 7, 2011
priority date (Note) -
Abandoned
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Abstract
A centrifugal fan with a multistage impeller includes a hub and a multistage impeller having at least two stages of blade assemblies. The hub has a top section and a circumferential section extending from the top section. At least one extension section outward extends from the circumferential section. The multistage impeller is connected with one end of the extension section. The multistage impeller includes a first-stage blade assembly and a second-stage blade assembly. The second-stage blade assembly has a diameter larger than that of the first-stage blade assembly. The centrifugal fan can be installed in an application environment with limited space without being interfered with by peripheral parts. Also, the centrifugal fan is able to provide an optimal flow and wind pressure at the same rotational speed to lower the load on the motor and reduce the noise.
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