Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Patent
1997-05-30
1999-04-20
Ryznic, John E.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
416195, 416242, B63H 116
Patent
active
058952063
ABSTRACT:
A mixed flow fan and heat exchanger assembly is "blow through" in that the fan discharges air into the upstream face of the heat exchanger which provides a flow resistance. The fan is mixed flow so that there are both axial and significant radial components to the air flow exiting the fan impeller. The radial components result in a static pressure facilitating flow through the heat exchanger. The assembly includes an impeller having a generally cylindrical hub and a number of backwardly swept blades. The impeller has an outlet swept radius that is greater than its inlet swept radius. A shroud encloses the impeller and guides the air flow into the impeller and to the heat exchanger. The cylindrical hub and a blade apparent solidity of less than one make the fan impeller adaptable to manufacturing in a single piece by a molding process. In a second embodiment there is a downstream blockage and the radial components to the air flow reduce impingement upon the blockage.
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Chuang Sue-Li
Subramanian Srinivasan
Carrier Corporation
Ryznic John E.
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