公开(公告)号：US20050166921A1

公开(公告)日：2005-08-04

申请号：US11088316

申请日：2005-03-23

申请人： Douglas DeVries ,  Malcolm Williams

发明人： Douglas DeVries ,  Malcolm Williams

IPC分类号： A61M16/00 ,  A62B7/00 ,  F01C1/18

CPC分类号： A61M16/0057 ,  A61M16/0063 ,  A61M16/0066 ,  A61M16/0069 ,  A61M2205/42 ,  F04C18/126 ,  F04C29/061 ,  F04C29/065

摘要： The invention comprises a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers. The invention has particular use for reducing noise generated by compressors used in mechanical ventilators, though the advantages thereof may be realized in many different applications. One embodiment of the invention comprises a noise-attenuating gas flow path for a compressor contained in a portable ventilator housing. In one embodiment, the gas flow path comprises a plurality of chambers interconnected by flow tubes. The flow path is folded so as to fit into the limited space of a portable ventilator housing. The dimensions of the chambers and the flow tubes are selected so that an impedance mismatch is created between the chambers and the flow tubes. In one embodiment of the invention, the flow path comprises one or more perforated tubes located in one or more of the chambers. The perforated tube has a port through which gas is accepted and at least one exterior tube through which gas exits. Impedance mismatches are created between the inlet chamber and the exterior tubes and between the exterior tubes and the chamber in which the perforated tube is located, which are useful in attenuating noise. One embodiment of the invention comprises a noise attenuating mounting system for a compressor. The mounting system comprises flexible mounts that cooperate to dampen vibrations generated by the compressor.

摘要翻译： 本发明包括一种减少压缩机产生的噪声的方法和装置，包括罗茨式鼓风机。 本发明特别用于降低在机械通风机中使用的压缩机产生的噪音，尽管其优点可以在许多不同的应用中实现。 本发明的一个实施例包括用于包含在便携式通风机壳体中的压缩机的噪声衰减气体流动路径。 在一个实施例中，气体流路包括通过流动管互连的多个室。 流路被折叠以便装配到便携式通风机壳体的有限空间中。 选择室和流管的尺寸，使得在腔室和流管之间产生阻抗失配。 在本发明的一个实施例中，流动路径包括位于一个或多个室中的一个或多个穿孔管。 多孔管具有可接受气体的端口和气体离开的至少一个外部管。 在入口室和外管之间以及外管和多孔管所在的室之间产生阻抗不匹配，这有助于衰减噪声。 本发明的一个实施例包括用于压缩机的噪声衰减安装系统。 安装系统包括柔性安装件，其配合以抑制由压缩机产生的振动。

公开(公告)号：US20050112013A1

公开(公告)日：2005-05-26

申请号：US10985528

申请日：2004-11-10

申请人： Douglas DeVries ,  Malcolm Williams

发明人： Douglas DeVries ,  Malcolm Williams

IPC分类号： A47C3/025 ,  A61H20060101 ,  A61M11/00 ,  A61M16/00 ,  A61M16/10 ,  A61M16/12 ,  A61M16/20 ,  A62B7/00 ,  F01C1/18 ,  F04C18/12 ,  F04C29/00

CPC分类号： A61M16/206 ,  A61M11/00 ,  A61M16/0057 ,  A61M16/0063 ,  A61M16/0066 ,  A61M16/0069 ,  A61M16/021 ,  A61M16/12 ,  A61M16/205 ,  A61M2016/0021 ,  A61M2016/0036 ,  A61M2016/1025 ,  A61M2202/0208 ,  A61M2205/16 ,  A61M2205/3317 ,  A61M2205/3365 ,  A61M2205/3368 ,  A61M2205/3553 ,  A61M2205/3569 ,  A61M2205/3584 ,  A61M2205/42 ,  A61M2205/505 ,  A61M2205/52 ,  A61M2205/581 ,  A61M2205/583 ,  A61M2205/70 ,  A61M2205/8206 ,  A61M2205/8237 ,  A61M2205/8262 ,  A61M2209/086 ,  A61M2230/205 ,  A61M2230/432 ,  F04C18/126 ,  F04C29/0035

摘要： A Roots-type blower comprises a housing defining a rotor chamber and an inlet and outlet to the rotor chamber. First and second rotors are mounted in the rotor chamber, each rotor defining a plurality of lobes, adjacent lobes and the housing cooperating to define gas transport chambers. The blower is configured so that a net flow rate of gas into a gas transport chamber is generally or approximately constant, whereby a change in gas pressure in the gas transport chamber is generally or approximately linear, as the gas transport chamber approaches the outlet. In one embodiment, this is accomplished by providing flow channels extending from the outlet towards the inlet, and from the inlet towards the outlet, corresponding to each rotor. The flow channels permit gas to flow from the high pressure outlet to a gas transport chamber and from the gas transport chamber to the low pressure inlet. The resulting amelioration of pressure spikes associated with flow back substantially reduces the operational noise level of the blower.

摘要翻译： 罗茨式鼓风机包括限定转子室的壳体和转子室的入口和出口。 第一和第二转子安装在转子室中，每个转子限定多个叶片，相邻的叶片和壳体配合以限定气体输送室。 鼓风机构造成使得进入气体输送室的气体的净流量通常或近似恒定，由此气体输送室接近出口时，气体输送室中的气体压力的变化大致或近似线性。 在一个实施例中，这是通过提供从出口向入口延伸的流动通道，并且从入口朝向与每个转子对应的出口。 流动通道允许气体从高压出口流到气体输送室，并从气体输送室流到低压入口。 由此导致的与回流相关联的压力峰值的改善大大降低了鼓风机的操作噪音水平。