专利名称：SILENCER FOR FAN
发明人：MATSUMURA TADANOBU 申请号：JP6619488
申请日：19880318
公开号：JPH01240799A
公开日：
19890926
摘要：PURPOSE:To improve a silencing effect by providing partitioning plates along the axial direction in a conduit for air to pass through and silencing chambers communicating through holes with each small conduit divided by the partitioning plate. CONSTITUTION:Noise, generated by an axial fan 48, is divided by partitioning plates 23 to 30 and introduced to each conduit 32 to 39. The noise of high frequency region is mainly silenced by an acoustic absorbing material 31. While the noise of low frequency region is guided into silencing chambers 40 to 42, having the three different silencing characteristics, through holes 43 to 45. The noise accumulates its pressure in these silencing chambers 40 to 42, and the noise is silenced decreasing its density.
申请人：FUJITSU LTD
from silence
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