Hand held appliance

Patent metadata

Field	Value
Publication number	US-9282800-B2
Application number	US-201313853635-A
Country	US
Kind code	B2
Filing date	Mar 29, 2013
Priority date	Mar 30, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A hand held appliance, such as a hairdryer, includes a body having a fluid inlet for admitting fluid into the appliance, a fluid outlet, a duct lined with a material, and a primary fluid flow path extending from the fluid inlet to the fluid outlet and through the duct. The material may be a foam or a felt and is a sound absorbing material, a vibration absorbing material, is an insulator, is tuned to resonant frequencies of the appliance. The primary fluid flow path may be non-linear. The duct may have a non-circular cross-section and may comprise a handle portion of the appliance, and the handle portion of the duct is lined with said material. A fan unit may be provided located upstream of the handle portion. The duct may comprise a first handle portion and a second handle portion of the appliance.

First claim

The invention claimed is:

1. A hairdryer comprising a body, a fan unit and a duct for conveying fluid to the body, wherein the duct comprises a handle portion of the hairdryer, an inlet portion, and a fluid inlet located at or near an end of the inlet portion of the duct which is remote from the body, wherein the fan unit is disposed in the duct between the inlet portion and the body, wherein a portion of the duct is lined with a material and wherein at least a first lined portion of the duct is disposed between the fan unit and the body.

2. The hairdryer of claim 1 , wherein a second lined portion of the duct is disposed between the fluid inlet and the fan unit.

3. The hairdryer of claim 1 , wherein the material is a foam or a felt.

4. The hairdryer of claim 1 , wherein the material is a sound absorbing material.

5. The hairdryer of claim 1 , wherein the material is a vibration absorbing material.

6. The hairdryer of claim 1 , wherein the material is an insulator.

7. The hairdryer of claim 1 , wherein the material is tuned to resonant frequencies of the hairdryer.

8. The hairdryer of claim 1 , wherein the fan unit is disposed approximately mid way between the inlet and the body.

9. The hairdryer of claim 1 , wherein the fan unit is upstream of the handle portion.

10. The hairdryer of claim 1 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet.

11. The hairdryer of claim 10 , wherein the primary fluid flow path is non-linear.

12. The hairdryer of claim 10 , wherein the primary fluid flow path extends at least partially through the body to the fluid outlet.

13. The hairdryer of claim 1 , wherein the duct has a circular cross-section.

14. The hairdryer of claim 1 , wherein the duct comprises a first handle portion and a second handle portion of the hairdryer, and wherein each handle portion is lined with said material.

15. The hairdryer of claim 14 , wherein the fan unit is located within a section of the primary fluid flow path located fluidly between the handle portions of the duct.

16. The hairdryer of claim 1 , wherein a heater is provided and the heater is located in the body.

17. The hairdryer of claim 16 , wherein the heater is located in the primary fluid flow path.

18. The hairdryer of claim 16 , wherein the heater is annular in shape.

19. The hairdryer of claim 16 , wherein the heater is tubular in shape.

20. The hairdryer of claim 1 , comprising a fluid flow path extending through the body.

21. The hairdryer of claim 20 , wherein fluid is drawn through the fluid flow path by fluid emitted from the fluid outlet of the primary fluid flow path.

22. The hairdryer of claim 20 , wherein that the fluid flow path passes linearly through the body.

23. The hairdryer of claim 22 , wherein the fluid flow path is defined by a bore extending through the body.

24. The hairdryer of claim 23 , wherein that the bore is an external wall of the body of the hairdryer.

25. The hairdryer of claim 23 , wherein the bore at least partially defines the fluid outlet.

26. The hairdryer of claim 23 , wherein the bore surrounds the heater.

27. A hand held appliance comprising a body, a fan unit and a duct for conveying fluid to the body, wherein the duct comprises a handle portion of the hairdryer, an inlet portion, and a-fluid inlet located at or near an end of the inlet portion of the duct which is remote from the body, wherein the fan unit is disposed in the duct between the inlet portion and the body, wherein a portion of the duct is lined with a material and wherein at least a first lined portion of the duct is disposed between the fan unit and the body.

28. The hairdryer of claim 16 , wherein the first fluid flow path is in thermal communication with the heater and the primary fluid flow path passes through the heater.

29. A hairdryer comprising a body, a fan unit and a duct for conveying fluid to the body, wherein the duct comprises a handle portion of the hairdryer, an inlet portion, and a fluid inlet located at or near an end of the inlet portion of the duct which is remote from the body, wherein the fan unit is disposed in the duct between the inlet portion and the body, wherein a portion of the duct is lined with a material.

30. The hairdryer of claim 29 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body and wherein the primary fluid flow path and fluid flow path are isolated within the hairdryer.

31. The hairdryer of claim 29 , further comprising a heater, wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body and wherein the first fluid flow path is in thermal communication with the heater and the primary fluid flow path passes through the heater.

32. The hairdryer of claim 29 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body, wherein the fluid flow path is defined by a bore extending through the body.

33. The hairdryer of claim 29 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body to a first fluid outlet wherein the first fluid outlet is arranged to emit fluid from the hairdryer.

34. The hairdryer of claim 29 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body, wherein the fluid flow path comprises a first fluid outlet and the first fluid outlet and the fluid outlet are both arranged to emit fluid from the hairdryer.

35. The hairdryer of claim 29 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body wherein the body comprises a first external wall and a second external wall extending about the first external wall, and wherein the first external wall defines a bore extending through the body, and wherein the fluid flow path extends through the bore.

36. The hairdryer of claim 29 , wherein a primary fluid flow path extends from the fluid inlet to a fluid outlet and a fluid flow path extends through the body, and the fluid flow path is nested or embedded in the primary fluid flow path.

Assignees

• Dyson Technology Ltd

Inventors

• Courtney Stephen Benjamin
• Moloney Patrick Joseph William
• Gammack Peter David

Classifications

• F24H3/0423

  hand-held air guns · CPC title

• A45D20/04 Primary

  Hot-air producers (A45D20/20, A45D20/22 take precedence) · CPC title

• A45D20/10 Primary

  Hand-held drying devices, e.g. air douches · CPC title

• A45D20/12

  Details thereof or accessories therefor, e.g. nozzles, stands · CPC title