A fan assembly for creating an air current includes an air inlet, an air outlet, an impeller and a motor for rotating the impeller to create an air flow passing from the air inlet to the air outlet. The air outlet includes an interior passage for receiving the air flow and a mouth for emitting the a
A fan assembly for creating an air current includes an air inlet, an air outlet, an impeller and a motor for rotating the impeller to create an air flow passing from the air inlet to the air outlet. The air outlet includes an interior passage for receiving the air flow and a mouth for emitting the air flow. The air outlet defines an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth. The motor has a rotor which, in use, is capable of rotating at a speed of at least 5,000 rpm.
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1. A fan assembly for creating an air current, the fan assembly comprising an air inlet, an air outlet, an impeller and a motor for rotating the impeller to create an air flow passing from the air inlet to the air outlet, the air outlet comprising an interior passage for receiving the air flow and a
1. A fan assembly for creating an air current, the fan assembly comprising an air inlet, an air outlet, an impeller and a motor for rotating the impeller to create an air flow passing from the air inlet to the air outlet, the air outlet comprising an interior passage for receiving the air flow and a mouth for emitting the air flow, the air outlet defining an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth, wherein the motor has a rotor which, in use, is capable of rotating at a speed of at least 5,000 rpm, the fan assembly comprising a base housing the impeller and the motor, the air inlet being located in a side wall of the base. 2. The fan assembly of claim 1, wherein the rotor is capable of rotating at a speed of at least 8,000 rpm. 3. The fan assembly of claim 1, wherein the rotor is capable of rotating at a speed of at least 9,000 rpm. 4. The fan assembly of claim 1, wherein the interior passage is shaped to divide the air flow into two air streams and to direct each air stream along a respective side of the opening. 5. The fan assembly of claim 1, wherein the air outlet comprises an annular inner casing section and an annular outer casing section which together define the interior passage and the mouth. 6. The fan assembly of claim 5, wherein the mouth comprises an outlet located between an external surface of the inner casing section and an internal surface of the outer casing section. 7. The fan assembly of claim 6, wherein the outlet is in the form of a slot. 8. The fan assembly of claim 6, wherein the outlet has a width in the range from 0.5 to 5 mm. 9. The fan assembly of claim 1, wherein the air outlet comprises a surface located adjacent the mouth and over which the mouth is arranged to direct the air flow. 10. The fan assembly of claim 9, wherein the surface is a Coanda surface. 11. The fan assembly of claim 10, wherein the air outlet comprises a diffuser located downstream of the Coanda surface. 12. The fan assembly of claim 1, wherein the motor is a DC brushless motor. 13. The fan assembly of claim 1, wherein the fan assembly has a height in the range from 400 to 1500 mm. 14. A fan assembly for creating an air current, the fan assembly comprising an air inlet, an air outlet, an impeller and a motor for rotating the impeller to create an air flow passing from the air inlet to the air outlet, the air outlet comprising an interior passage for receiving the air flow and a mouth for emitting the air flow, the air outlet defining an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth, wherein the motor has a rotor which, in use, is capable of rotating at a speed of at least 5,000 rpm, wherein the air outlet comprises a Coanda surface located adjacent the mouth and over which the mouth is arranged to direct the air flow, and a diffuser located downstream of the Coanda surface. 15. The fan assembly of claim 14, wherein the air outlet comprises an annular inner casing section and an annular outer casing section which together define the interior passage and the mouth. 16. The fan assembly of claim 15, wherein the mouth comprises an outlet located between an external surface of the inner casing section and an internal surface of the outer casing section. 17. The fan assembly of claim 16, wherein the outlet is in the form of a slot. 18. The fan assembly of claim 16, wherein the outlet has a width in the range from 0.5 to 5 mm.
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