Fan

• US 9,151,299 B2
• Filed: 02/06/2013
• Issued: 10/06/2015
• Est. Priority Date: 02/06/2012
• Status: Active Grant

• Current Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Original Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Inventors: Simmonds, Kevin John, Nock, Ian Robert, Warnes, Benjamin Stephen
• Primary Examiner(s): Wiehe, Nathaniel
• Assistant Examiner(s): Lee, Jr., Woody A
• Application Number:
  US13/760,718
• Publication Number:
  US 20130202413A1
• Time in Patent Office: 972 Days
• Field of Search: 415/214.1
• US Class Current: 1/1
• CPC Class Codes: B03C 3/08 characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
• CPC Class Codes: B03C 3/09 characterised by presence of stationary flat electrodes arranged with their flat surfaces at right angles to the gas stream
• CPC Class Codes: F04D 25/08 the working fluid being air, e.g. for ventilation
• CPC Class Codes: F04D 29/703 specially for fans, e.g. fan guards
• CPC Class Codes: F04F 5/16 displacing elastic fluids
• CPC Class Codes: F24F 8/192 by electrical means, e.g. by applying electrostatic fields or high voltages
• CPC Class Codes: F24F 8/30 by ionisation
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

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 ionizer is located within the bore of the nozzle for treating the air drawn through the bore.

Claims

1. A fan comprising:

a base comprising an impeller and a motor for driving the impeller; and

a nozzle connected to the base, the nozzle comprising at least one air inlet, at least one air outlet, an annular 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 ionizer located within the casing for treating the air drawn through the bore.

2. The fan of claim 1, wherein the ionizer is located at least partially within the bore of the nozzle.

3. The fan of claim 1, wherein the ionizer is housed within a cartridge removable from the bore of the nozzle.

4. The fan of claim 1, wherein said at least one air outlet is arranged to emit air away from the ionizer.

5. 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.

6. The fan of claim 5, wherein the ionizer is located between said at least one air outlet and the rear end of the nozzle.

7. The fan of claim 1, wherein said at least one air outlet extends across the bore of the nozzle.

8. 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.

9. The fan of claim 8, wherein each air outlet is in the form of a slot.

10. The fan of claim 8, wherein the air outlets are substantially parallel.

11. 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.

12. The fan of claim 11, wherein at least part of said at least one air passage extends at least partially about the electrostatic precipitator.

13. The fan of claim 11, 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.

14. The fan of claim 13, wherein the air treating unit comprises an air filter.

15. The fan of claim 11, wherein said at least one air inlet is arranged to admit air into the fan.

16. The fan of claim 15, 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.

17. The fan of claim 16, 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.

18. The fan of claim 17, wherein at least part of the second air passage extends across the bore of the nozzle.

19. The fan of claim 18, wherein said at least part of the second air passage extends in a direction orthogonal to a central axis of the bore.

20. The fan of claim 17, 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.