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1. 发明申请

WO1983004287A1 VENTILATION FAN WITH NOISE-ATTENUATING HOUSING 审中-公开
标题翻译：通风扇与噪音衰减的房屋
公开(公告)号：WO1983004287A1
公开(公告)日：1983-12-08
申请号：PCT/US1983000812
申请日：1983-05-25
申请人： PEABODY FANS
发明人： PEABODY FANS , TINKER, Charles, L.
IPC分类号： F04D29/66
CPC分类号： F04D29/664 , Y10S454/906
摘要： In a high-speed, high-volume ventilation fan, a noise attenuating housing structure (10) includes a perforated inner casing (44) contained within a solid-walled outer casing (12). Filling the space between inner and outer casings is a porous, sound-absorbing material (48a, 48b). To prevent loss of downstream pressure, and therefore operational efficiency, due to leakages of air through the sound absorbing material from the downstream side at the fan blades (36) to the upstream side thereof, an annular anti-flow barrier (54, 58) is situated in the space between the inner and outer casings slightly downstream of the fan blades. The structure thus provides a high degree of noise attenuation without sacrificing operational efficiency.
摘要翻译：在高速，高容量的通风扇中，噪声衰减的壳体结构包括容纳在实心外壳内的穿孔内壳。填充内壳和外壳之间的空间是多孔的吸声材料。为了防止由于吸风材料从风扇叶片的下游侧到其上游侧的空气的泄漏而导致的下游压力的损失和因此的运行效率，环形防流动屏障位于内壳和外壳稍微在风扇叶片的下游。因此，该结构提供高度的噪声衰减，而不牺牲操作效率。

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