A fan includes a base and a nozzle mounted on the base. The base includes an impeller and a motor for driving the impeller to generate an air flow. The nozzle includes an air inlet, an air outlet, and an annular casing which defines a bore through which air from outside the fan is drawn by air emitt
A fan includes a base and a nozzle mounted on the base. The base includes an impeller and a motor for driving the impeller to generate an air flow. The nozzle includes an air inlet, an air outlet, and an annular casing which defines a bore through which air from outside the fan is drawn by air emitted from the air outlet. An electrostatic precipitator is located within the bore of the nozzle for treating the air drawn through the bore.
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1. A fan comprising: a base comprising an impeller and a motor for driving the impeller; anda nozzle connected to the base, the nozzle comprising at least one air inlet, at least one air outlet, a casing defining a bore through which air from outside the fan is drawn by air emitted from said at leas
1. A fan comprising: a base comprising an impeller and a motor for driving the impeller; anda nozzle connected to the base, the nozzle comprising at least one air inlet, at least one air outlet, a casing defining a bore through which air from outside the fan is drawn by air emitted from said at least one air outlet, and an electrostatic precipitator located within the casing for treating the air drawn through the bore. 2. The fan of claim 1, wherein the electrostatic precipitator is located at least partially within the bore of the nozzle. 3. The fan of claim 1, wherein at least part of the electrostatic precipitator is housed within a cartridge removable from the bore of the nozzle. 4. The fan of claim 1, wherein the electrostatic precipitator comprises a plurality of parallel plates extending across the bore of the nozzle. 5. The fan of claim 1, wherein said at least one air outlet is arranged to emit air away from the electrostatic precipitator. 6. The fan of claim 1, wherein the nozzle has a front end towards which air is emitted from said at least one air outlet, and a rear end opposite to the front end, and wherein said at least one air outlet is located between the front end and the rear end. 7. The fan of claim 6, wherein the electrostatic precipitator is located between said at least one air outlet and the rear end of the nozzle. 8. The fan of claim 1, wherein said at least one air outlet extends across the bore of the nozzle. 9. The fan of claim 1, wherein said at least one air outlet comprises a plurality of air outlets, each air outlet extending across the bore of the nozzle. 10. The fan of claim 9, wherein each air outlet is in the form of a slot. 11. The fan of claim 9, wherein the air outlets are substantially parallel. 12. The fan of claim 1, wherein the nozzle comprises at least one air passage for conveying air from said at least one air inlet towards said at least one air outlet. 13. The fan of claim 12, wherein at least part of said at least one air passage extends at least partially about the electrostatic precipitator. 14. The fan of claim 12, wherein said at least one air passage comprises an air treating unit for treating air drawn into the fan through said at least one air inlet. 15. The fan of claim 14, wherein the air treating unit comprises an air filter. 16. The fan of claim 12, wherein said at least one air inlet is arranged to admit air into the fan. 17. The fan of claim 16, wherein the nozzle comprises an air outlet port for conveying air to the base, and an air inlet port for receiving air from the base. 18. The fan of claim 17, wherein said at least one air passage comprises a first air passage for conveying air from said at least one air inlet to the air outlet port, and a second air passage for conveying air from the air inlet port to said at least one air outlet. 19. The fan of claim 18, wherein at least part of the second air passage extends across the bore of the nozzle. 20. The fan of claim 19, wherein said at least part of the second air passage extends in a direction orthogonal to a central axis of the bore. 21. The fan of claim 18, wherein the second air passage comprises a plurality of sections each extending across the bore of the nozzle, and said at least one air outlet comprises a plurality of air outlets, each air outlet being located in a respective section of the second air passage.
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