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US 6,599,105 B1Granted
Fan motor pressure housing, comprising a motor housing and a motor shroud with an air cooling passage there between
AssigneeEmerson Electric Co.
InventorFrank E. Cahill
Life of this patent
Estimating the term…
Abstract
A propeller-type fan including a pressure housing for improving air flow past a motor which powers the fan.
Claims51
A propeller-type cooling fan having a motor which powers fan blades to thereby cause air to flow past the motor, said fan comprising:
- a motor housing presenting an axially extending outer sidewall surface;
- and
- a motor shroud radially spaced from the outer sidewall surface and surrounding at least a portion of the outer sidewall surface,
- said motor shroud presenting inner and outer shroud surfaces,
- said inner shroud surface and said outer sidewall surface defining an axially extending motor-cooling air passageway therebetween, such that air flowing past the motor is separated into motor-cooling air flow within the motor-cooling air passageway and general air flow outside the outer shroud surface.
2 more elements
A propeller-type cooling fan having a motor which powers fan blades to thereby cause air to flow past the motor, said fan comprising:
- a motor housing presenting an axially extending outer sidewall surface;
- and
- a motor shroud radially paced from the outer sidewall surface and surrounding at least a portion of the outer sidewall surface,
- said motor shroud presenting inner and outer shroud surfaces,
- said inner shroud surface and said outer sidewall surface defining an axially extending motor-cooling air passageway therebetween,
- said motor-cooling air passageway having first and second axially spaced open passageway ends,
- said motor-cooling air passageway being narrower between the first and second passageway ends than at either of the first or second passageway ends.
4 more elements
A propeller-type cooling fan having a motor which powers fan blades to thereby cause air to flow past the motor, said fan comprising:
- a motor housing presenting an axially extending outer sidewall surface;
- and
- a motor shroud radially spaced from the outer sidewall surface and surrounding at least a portion of the outer sidewall surface,
- said motor shroud presenting inner arid outer shroud surfaces,
- said inner shroud surface and said outer sidewall surface defining an axially extending motor-cooling air passageway therebetween,
- said motor shroud including axially spaced first and second shroud ends,
- said inner and outer shroud surfaces converging toward one another as the shroud surfaces extend axially toward the first shroud end.
4 more elements
A cooling fan comprising:
- a motor having first and second axially spaced ends;
- a drive shaft extending from the first end of the motor, powered by the motor, and rotatable on a motor axis;
- a fan blade assembly including a hub rigidly coupled to the drive shaft;
- a spinner rigidly coupled to the drive shaft and at least partly covering the hub, said spinner presenting a substantially smooth outer spinner surface having a rounded spinner end portion;
- and
- a distributor core positioned proximate the second end of the motor, said distributor core presenting a substantially smooth outer core surface having a rounded core end portion,
- said motor including a housing having first and second axially spaced end walls and a side wall extending between the end walls,
- said drive shaft extending through the first end wall,
- said distributor core being coupled to the second end wall,
- said outer core surface including a base core portion which is substantially flush with an outer sidewall surface of the sidewall,
- said distributor core including a plurality of recessed screw sockets receiving a plurality of threaded core fasteners for attaching the distributor core to the second end wall,
- said distributor core including a plurality of fairings for covering the recessed screw sockets,
- said fairings presenting a portion of the outer core surface.
10 more elements
A cooling fan comprising:
- a motor having first and second axially spaced ends;
- a drive shaft extending from the first end of the motor, powered by the motor, and rotatable on a motor axis
- a fan blade assembly including a hub rigidly coupled to the drive shaft;
- a spinner rigidly coupled to the drive shaft and at least partly covering the hub said spinner presenting a substantially smooth outer spinner surface having a rounded spinner end portion;
- a distributor core positioned proximate the second end of the motor, said distributor core presenting a substantially smooth outer core surface having a rounded core end portion;
- and
- a motor shroud radially spaced from and surrounding at least a portion of the motor,
- said motor including a housing having an axially extending sidewall,
- said sidewall presenting an outer sidewall surface which cooperates with an inner shroud surface of the motor shroud to define an axially extending motor-cooling air passageway between the motor shroud and the motor,
- said motor-cooling air passageway having first and second axially spaced open passageway ends,
- said motor-cooling air passageway being narrower between the first and second passageway ends than at either of the first or second passageway ends.
8 more elements
A method of circulating air with a cooling fan, said method comprising the steps of:
- (a) rotating a fan blade assembly to thereby force air to flow past a motor which provides power for rotating the fan blade assembly;
- and
- (b) separating the air flowing past the motor into a motor-cooling air flow and a general air flow, said motor-cooling air flow flowing between an outer sidewall surface of the motor and an inner shroud surface of a motor shroud surrounding the motor, said general air flow flowing outside an outer shroud surface of the motor shroud.
A propeller-type cooling fan having a motor, said fan comprising:
- at least one fan blade powered by the motor to thereby cause air to flow past the motor;
- a motor housing presenting an axially extending outer sidewall surface;
- and
- a motor shroud radially spaced from the outer sidewall surface and surrounding at least a portion of the outer sidewall surface,
- said motor shroud presenting inner and outer shroud surfaces, with the at least one fan blade projecting radially outward beyond the outer shroud surface,
- said inner shroud surface and said outer sidewall surface defining an axially extending motor-cooling air passageway therebetween.
3 more elements
Dependencies are inferred from the claim text.