Fan assembly

• US 8,932,028 B2
• Filed: 03/21/2014
• Issued: 01/13/2015
• Est. Priority Date: 03/04/2009
• Status: Active Grant

• Current Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Original Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Inventors: Fitton, Nicholas Gerald, Gammack, Peter David, Dyson, James, Sutton, John Scott, Wallace, John David, Smith, Arran George
• Primary Examiner(s): LETTMAN, BRYAN MATTHEW
• Application Number:
  US14/222,167
• Publication Number:
  US 20140205470A1
• Time in Patent Office: 298 Days
• Field of Search: 239/265.17, 239/434.5, 239/561, 239/568, 239/DIG.7, 417/76, 417/84, 417/155, 417/177, 417/198, 417/151, 417/158, 417/178
• US Class Current: 417/84
• CPC Class Codes: F04D 25/08 the working fluid being air, e.g. for ventilation
• CPC Class Codes: F04D 29/441 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/582 specially adapted for elastic fluid pumps
• CPC Class Codes: F04F 5/16 displacing elastic fluids
• CPC Class Codes: F04F 5/46 Arrangements of nozzles
• CPC Class Codes: F24F 1/01 in which secondary air is induced by injector action of the primary air
• CPC Class Codes: F24F 13/26 Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
• CPC Class Codes: F24F 2221/28 using the Coanda effect
• CPC Class Codes: F24F 7/06 with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
• CPC Class Codes: F24F 7/065 fan combined with single duct; mounting arrangements of a fan in a duct
• CPC Class Codes: F24H 3/0417 portable or mobile

Abstract

A bladeless fan assembly for creating an air current includes a nozzle mounted on a base housing a device for creating an air flow. The nozzle includes an interior passage for receiving the air flow and a mouth for emitting the air flow. The nozzle defines, and extends about, an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth. The nozzle also includes a heater for heating the air flow upstream of the mouth.

Claims

1. A nozzle for a fan assembly for creating an air current, the nozzle comprising an interior passage for receiving an air flow and a mouth for emitting the air flow, the nozzle defining and extending about a central opening through which air from outside the nozzle is drawn by the air flow emitted from the mouth, the nozzle further comprising a heater, wherein at least part of the heater is arranged within the nozzle so as to extend about the opening by at least 270°

.

2. The nozzle of claim 1, wherein at least part of the heater is arranged within the nozzle so as to extend about the opening by at least 315°

.

3. The nozzle of claim 1, wherein the heater is located within the interior passage of the nozzle.

4. The nozzle of claim 1, wherein the interior passage is annular.

5. The nozzle of claim 1, comprising an annular outer casing section connected to and extending about an annular inner casing section.

6. The nozzle of claim 5, wherein the outer casing section comprises a base, the base comprising an aperture through which the air flow enters the interior passage.

7. The nozzle of claim 1, wherein the mouth extends about the opening.

8. The nozzle of claim 1, wherein the mouth is substantially annular.

9. The nozzle of claim 1, wherein the interior passage is shaped to divide the air flow into two air flows which flow in opposite directions around the opening.

10. The nozzle of claim 1, wherein the heater and the interior passage have the same curvature.

11. The nozzle of claim 1, wherein the nozzle and the heater are concentric.

12. The nozzle of claim 1, comprising a plurality of heaters, at least part of each heater being arranged within the nozzle.

13. A fan assembly comprising the nozzle of claim 1.

14. The fan assembly of claim 13, comprising a base, the nozzle being mounted on the base.

15. The fan assembly of claim 14, wherein the base comprises a device for generating the air flow, the base comprising a plurality of air inlets through which the air flow enters the fan assembly.