Reduced noise diffuser for a motor-fan assembly
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United States of America Patent
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Issued Date -
Feb 1, 2007
app pub date -
Jul 29, 2005
filing date -
Jul 29, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An air diffuser for a motor-fan unit having reduced blade passage frequencies, and reduced noise generation, includes a baffle plate, external vanes, internal vanes, diffuser ports, and a central opening. The baffle plate of the diffuser is made integral with the internal and external vanes, such that any leaking, rattling, or pure tone noise that may be generated from air movement over the surface of the diffuser are prevented or reduced. Additionally, the number of internal and external vanes provided by the diffuser is that equal to a prime number, thus resulting in a reduction of harmonic and pure tone noise generated during the operation of the motor-fan unit.
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