HAND HELD APPLIANCE

• US 20130269200A1
• Filed: 03/28/2013
• Published: 10/17/2013
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Original Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Inventors: MOLONEY, Patrick Joseph William, GAMMACK, Peter David
• Granted Patent: US 10,117,491 B2
• Time in Patent Office: Days
• US Class Current: 34/97
• CPC Class Codes: A45D 20/00 Hair drying devices; Accessories therefor A45D2/00 takes precedence
• CPC Class Codes: A45D 20/10 Hand-held drying devices, e.g. air douches
• CPC Class Codes: A45D 20/12 Details thereof or accessories therefor, e.g. nozzles, stands
• CPC Class Codes: F24H 3/0423 hand-held air guns
• CPC Class Codes: F24H 9/0063 in air channels

Abstract

A hand held appliance, such as a hairdryer, includes at least one fluid inlet for admitting fluid into the appliance, at least one fluid outlet for emitting fluid from the appliance, at least one fluid flow path extending through the appliance, a heater, and a fluid chamber at least partially defined by an external wall of the appliance, the chamber being configured to provide a thermally insulating barrier between the heater and the external wall. The fluid flow path comprises two parallel sections.

Claims

1. A hairdryer comprising at least one fluid inlet for admitting fluid into the hairdryer, at least one fluid outlet for emitting fluid from the hairdryer, at least one fluid flow path extending through the hairdryer, a heater, and a fluid chamber at least partially defined by an external wall of the hairdryer, the chamber being configured to provide a thermally insulating barrier between the heater and the external wall wherein the fluid flow path comprises two parallel sections.

2. The hairdryer of claim 1, wherein the chamber extends about the heater.

3. The hairdryer of claim 1, wherein the heater is annular in shape and the chamber extends about an external periphery of the heater.

4. The hairdryer of claim 1, wherein the chamber extends about an internal periphery of the heater.

5. The hairdryer of claim 1, comprising a body and a handle connected to the body, and wherein the chamber is located within the body.

6. The hairdryer of claim 5, wherein the body comprises a tubular wall defining a bore through which fluid flows through the hairdryer, and wherein the fluid chamber is located between the external wall and the tubular wall.

7. The hairdryer of claim 6, wherein the fluid chamber extends about the bore.

8. The hairdryer of claim 1, wherein said at least one fluid flow path comprises a fluid flow path and a primary fluid flow path.

9. The hairdryer of claim 6, wherein said at least one fluid flow path comprises a fluid flow path and a primary fluid flow path, and wherein the fluid flow path extends about the bore and the primary fluid flow path extends at least partially about the bore and through the fluid chamber.

10. The hairdryer of claim 1, wherein a first one of the parallel sections extends through the fluid chamber and a second one of the parallel sections extends through the heater.

11. The hairdryer of claim 1, wherein the fluid flow path comprises two series sections, and wherein a first, upstream one of the series sections extends through the fluid chamber and a second, downstream one of the series sections extends through the heater.

12. The hairdryer of claim 11, wherein the outlet section is configured such that fluid flows in different directions through the series sections.

13. The hairdryer of claim 11, wherein the outlet section is configured such that fluid flows in opposite directions through the series sections.

14. The hairdryer of claim 8, wherein the primary fluid flow path extends through the handle.

15. The hairdryer of claim 1, wherein said at least one fluid outlet comprises a first fluid outlet for emitting fluid from the fluid flow path and a second fluid outlet for emitting fluid from the primary fluid flow path.

16. The hairdryer of claim 15, wherein the fluid chamber extends about the second fluid outlet.

17. The hairdryer of claim 15, wherein the fluid chamber extends about the first fluid outlet.

18. The hairdryer of claim 15, wherein the second fluid outlet is arranged to emit fluid into the fluid flow path.

19. The hairdryer of claim 6, wherein said at least one fluid outlet comprises a first fluid outlet for emitting fluid from the fluid flow path and a second fluid outlet for emitting fluid from the primary fluid flow path, and wherein the tubular wall at least partially defines the second fluid outlet.

20. The hairdryer of claim 6, wherein said at least one fluid outlet comprises a first fluid outlet for emitting fluid from the fluid flow path and a second fluid outlet for emitting fluid from the primary fluid flow path, and wherein fluid is entrained through the bore by the fluid emitted from the second fluid outlet.

21. A hand held appliance comprising at least one fluid inlet for admitting fluid into the appliance, at least one fluid outlet for emitting fluid from the appliance, at least one fluid flow path extending through the appliance, a heater, and a fluid chamber at least partially defined by an external wall of the appliance, the chamber being configured to provide a thermally insulating barrier between the heater and the external wall wherein the fluid flow path comprises two parallel sections.

22. The appliance of claim 21, wherein the heater is located downstream of the fluid chamber.