Low-noise machine package

Details Low-noise machine package Low-noise machine package

2008-01-31

2010-12-07

Donels, Jeffrey (Department: 2832)

Acoustics

Sound-modifying means

Housing or enclosure

C181S198000, C181S202000, C415S211100, C415S211200

Reexamination Certificate

active

07845463

ABSTRACT:
A conventional machine package faces problems concerned with costs, weight, etc. and also a problem of antinomy that an attempt to enhance the noise reducing performance increases the airflow resistance and then deteriorates the cooling performance. Providing a sound absorbing structure with the heat radiation performance ensured within a practical range and then with considerably improved noise reducing effect achieves a low-noise machine package with a downsized casing and a reduced cooling fan power. There is provided a sound absorbing structure having a plurality of polyester fiber sound absorbing cylinders each formed into a circular-cylindrical shape, formed of a base material of polyester fiber whose surface is combined and covered with polymer nonwoven fabric of polyester fiber or the like, and arranged at a support member in at least either of a suction port and an exhaust port in such a manner that long axes of the sound absorbing cylinders intersect substantially perpendicularly with a flow direction of air flowing through the suction port or the exhaust port. This makes it possible to reduce noise while controlling the airflow resistance minimum, thus achieving downsizing of a cooling fan and reduction of a cooling fan power.

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PAJ machine translation of (JP2000-087725).
PAJ machine translationof (JP2002-266756).
Korean office action dated Jan. 21, 2009.
Korean office action dated Sep. 15, 2009.
Chinese office action dated Oct. 16, 2009.

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