| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pressure increase time quicker than ever before, with greater reliability and less acoustic noise. <P>SOLUTION: A multiple stage variable speed blower for continuous positive airway pressure (CPAP) ventilation of patients includes two impellers (114, 115) in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the multiple stage blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise. <P>COPYRIGHT: (C)2011,JPO&INPIT |
