发明名称 |
COMPACT LOW NOISE EFFICIENT BLOWER FOR CPAP DEVICES |
摘要 |
The present invention relates to a blower comprising an electric motor having a shaft, said shaft defines a shaft axis; a housing having a housing inlet and a housing outlet between which is defined a flow path for gas; the housing outlet is structured to direct gas exiting the blower in a substantially axial first direction; the motor has a first side proximal said housing inlet, and a second side distal said housing inlet; a first impeller having a plurality of blades adapted to accelerate gas tangentially and to direct it radially outward and being attached to the shaft on the first side of the motor; a stationary portion including: a gas flow path defined between the motor external wall and a wall of the stationary portion, said flow path being of sufficient width to allow a flow of gas therethrough without introducing excessive pressure drop, said flow path directing gas to flow in a generally axial direction from the first side of the motor to the second side of the motor; a first stationary vane structure located downstream of the first impeller, the first stationary vane structure adapted to direct gas exiting the first impeller from flowing in a substantially tangential direction to flowing in both a radial and axial direction; and a shield constructed and arranged to provide a barrier between the first stationary vane structure and the blades of the first impeller to isolate leading edges of the first stationary vane structure from an impeller blade pressure pulse. |
申请公布号 |
EP2032857(A1) |
申请公布日期 |
2009.03.11 |
申请号 |
EP20070718965 |
申请日期 |
2007.05.24 |
申请人 |
RESMED LIMITED |
发明人 |
KENYON, BARTON, JOHN;SWEENEY, PETER, JOHN |
分类号 |
F04D19/02;A61M16/00;A61M16/06;F04D3/00;F04D29/32;F04D29/52 |
主分类号 |
F04D19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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