Blower wheel having interior motor cooling ribs

Details Blower wheel having interior motor cooling ribs Blower wheel having interior motor cooling ribs

1997-11-07

2000-02-15

Thorpe, Timothy S.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

41742314, 416203, 416175, F04B 3906

Patent

active

060245433

ABSTRACT:
A blower wheel for an electric motor driven fan includes an impeller in concentric alignment with a back plate. The back plate has an interior sleeve with a plurality of inwardly directed ribs that define a motor receiving circle in which a motor is disposed. Gaps between the ribs form a cooling shroud about a motor rotor such that when the blower wheel is rotated the plurality of ribs force high velocity air through the gaps and over the outside surface of the rotor. The blower also includes a shroud positioned about the blower wheel and motor having inlet and outlet air openings.

REFERENCES:
patent: 2251807 (1941-08-01), Ruthman
patent: 3885888 (1975-05-01), Warhol
patent: 4306838 (1981-12-01), Trainer
patent: 4647271 (1987-03-01), Nagai et al.
patent: 5554004 (1996-09-01), Steward
patent: 5893705 (1999-04-01), Khan et al.
McLean Engineering, Capability Introduction Brochure, cover and 1 page.
EBM/PAPST, Backward Curved AC Impellers Brochure, cover and pages 65 and 136 (1995).
Continental Fan Mfg., Inc., CK Series Brochure, cover and 1 page.

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