Nozzle for bladeless fan assembly with heater

• US 9,599,368 B2
• Filed: 12/08/2014
• Issued: 03/21/2017
• 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, Sutton, John Scott, Gammack, Peter David, Dyson, James, Wallace, John David, Smith, Arran George
• Primary Examiner(s): LETTMAN, BRYAN MATTHEW
• Application Number:
  US14/563,490
• Publication Number:
  US 20150093098A1
• Time in Patent Office: 834 Days
• US Class Current: 1/1
• 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 plurality of heaters arranged in a rear of the interior passage, relative to a flow direction of the air from outside in the central opening, so that the air flow passes through the plurality of heaters before entering the mouth and arranged to extend about the central opening, wherein the heaters can be selectively activated.

2. The nozzle of claim 1, wherein the heaters are activated individually.

3. The nozzle of claim 1, wherein the heaters are activated in pre-defined combinations.

4. The nozzle of claim 1, wherein the heaters extend about the opening by at least 270°

.

5. The nozzle of claim 1, wherein the heaters extend about the opening by at least 315°

.

6. The nozzle of claim 1, wherein the heaters comprise porous heaters.

7. The nozzle of claim 1, wherein the heaters comprise a plurality of heat radiating fins.

8. The nozzle of claim 1, wherein the heaters are in thermal contact with the interior passage.

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

10. The nozzle of claim 1, comprising an inner casing section and an outer casing section which together define the interior passage and the mouth.

11. The nozzle of claim 10, wherein the heaters are arranged to heat the inner casing section of the nozzle.

12. The nozzle of claim 10, wherein the inner casing section of the nozzle comprises said heaters.

13. The nozzle of claim 1, comprising a surface located adjacent the mouth and over which the mouth is arranged to direct the air flow.

14. The nozzle of claim 13, wherein the surface comprises a Coanda surface.

15. The nozzle of claim 14, wherein the nozzle comprises a diffuser surface located downstream from the Coanda surface.