A self-cooling fan in configured with a vent feature that draws air into a fan housing and over a heat sink to dissipate heat generated by the motor and/or control unit. The self-cooling fan has a conduit with an attached end opening that couples with a cooling zone within the fan housing and extend
A self-cooling fan in configured with a vent feature that draws air into a fan housing and over a heat sink to dissipate heat generated by the motor and/or control unit. The self-cooling fan has a conduit with an attached end opening that couples with a cooling zone within the fan housing and extends along a portion of the fan blade(s). A vent feature is an opening in a conduit, at or near the extended end of the conduit, that allows air to exit the conduit. A vent feature may be a venturi feature. A venturi feature creates a vacuum within a conduit via outer diameter blade velocities interacting with venturi geometries when the blades are rotating, further promoting the drawing of air into the fan housing. A cooling channel allows air from outside of the fan assembly to enter into a cooling zone where a heat sink is configured.
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1. A self-cooling ceiling fan assembly comprising: a. a fan housing;b. at least one cooling channel;c. a shaft;d. a motor;e. a plurality of air foil shaped fan blades wherein each fan blade comprises: i. a length;ii. an attached end;iii. an extended end;f. a vent feature comprising one of more openi
1. A self-cooling ceiling fan assembly comprising: a. a fan housing;b. at least one cooling channel;c. a shaft;d. a motor;e. a plurality of air foil shaped fan blades wherein each fan blade comprises: i. a length;ii. an attached end;iii. an extended end;f. a vent feature comprising one of more openings in the extended end of at least one of said plurality of fan blades; andg. a conduit extending from said attached end, along the length of said at least one of said plurality of fan blades to said vent feature and having a conduit opening that opens into the vent feature;whereby when said plurality of fan blades rotate, air flows through said at least one cooling channel, through said fan housing, through said conduit, through said conduit opening and into the vent feature and out of said vent feature to provide a self-cooling fan assembly; andwherein the air flows through the cooling channel into a cooling zone to cool said motor and/or a control unit. 2. The self-cooling ceiling fan of claim 1, wherein the conduit extends within at least one of the plurality of fan blades. 3. The self-cooling ceiling fan assembly of claim 1, wherein the cooling channel extends from the exterior of the fan housing to the cooling zone, whereby when the plurality of fan blades rotate, air flows from an area immediately outside of the fan housing into the cooling channel, into the cooling zone, through and out of said vent feature. 4. The self-cooling ceiling fan assembly of claim 3, comprising a heat sink configured within the cooling zone, whereby air flows over the heat sink when the plurality of fan blades rotate. 5. The self-cooling ceiling fan assembly of claim 4, wherein the heat sink is operably coupled to the motor. 6. The self-cooling ceiling fan assembly of claim 4, wherein the heat sink is operably coupled to said control unit. 7. The self-cooling ceiling fan assembly of claim 6, wherein the control unit is configured proximate a free end of said fan assembly and the heat sink is configured between said control unit and the motor. 8. The self-cooling ceiling fan assembly of claim 4, wherein a first heat sink is coupled to said control unit and a second heat sink is coupled to the motor. 9. The self-cooling ceiling fan assembly of claim 4, wherein the heat sink comprises a plurality of fins that extend radially from the shaft. 10. The self-cooling ceiling fan assembly of claim 1, wherein the plurality of fan blades are hollow fan blades and the conduit is formed by at least one of said hollow fan blades. 11. The self-cooling ceiling fan assembly of claim 1, wherein the self-cooling fan assembly is a high volume low speed fan having a diameter of no less than 8 feet. 12. The self-cooling ceiling fan assembly of claim 1, wherein the motor is a transverse flux motor. 13. The self-cooling ceiling fan assembly of claim 1, wherein the vent feature comprises a venturi feature. 14. The self-cooling ceiling fan assembly of claim 13, wherein the venturi feature consists essentially of one or more venturi openings in at least one of the extended ends of the plurality of fan blades. 15. The self-cooling ceiling fan assembly of claim 13, wherein the venturi feature comprises a venturi adapter that is coupled to the extended end of at least one of said plurality of fan blades. 16. The self-cooling ceiling fan assembly of claim 13, wherein the venturi feature comprises a venturi flow channel comprising: a. venturi inlet;b. a venturi outlet; andc. a length from said venturi inlet to said venturi outlet, wherein the conduit opening of the conduit opens into the venture channel;whereby said venturi flow channel has a change in a cross-sectional area along said length of said venturi flow channel. 17. The self-cooling ceiling fan assembly of claim 1, wherein the vent feature is a direction neutral vent feature, whereby air flows out from said conduit with the plurality of fan blades moving in a first or in an opposing second direction. 18. The self-cooling ceiling fan assembly of claim 1, wherein the cooling channel is an open space between the shaft and the motor. 19. The self-cooling ceiling fan assembly of claim 1, wherein the cooling channel is an open space between the shaft and a control unit. 20. The self-cooling ceiling fan assembly of claim 1, wherein the fan blades are coupled to a fan mount, and wherein the fan mount is coupled to a rotor that is configured around a fixed stator. 21. The self-cooling ceiling fan assembly of claim 20, wherein the motor is a transverse flux motor. 22. A self-cooling ceiling fan assembly comprising: a. a fan housing;b. a shaft;c. a motor,d. a control unit;e. a cooling channel;f. a cooling zone;g. a plurality of air foil shaped fan blades wherein each fan blade comprises: i. a length;ii. an attached end; andiii. an extended end;h. a vent feature coupled to the extended end of least one of said plurality of fan blades; andi. a conduit extending within at least one of said plurality of fan blades from the attached end along the length of the fan blade to the vent feature;wherein the conduit has a conduit opening that opens into said vent feature;whereby when the plurality of fan blades rotate, the vent feature draws air into the cooling zone from the cooling channel, through an opening in the attached end of at least one of said plurality of fan blades, through said conduit, through said conduit opening and into the vent feature and out of said vent feature. 23. The self-cooling ceiling fan assembly of claim 22, wherein the fan blades are coupled to a fan mount, and wherein the fan mount is coupled to a rotor that is configured around a fixed stator and the motor is a transverse flux motor.
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