HAND HELD APPLIANCE

• US 20130283630A1
• Filed: 03/29/2013
• Published: 10/31/2013
• 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: COURTNEY, Stephen Benjamin, MOLONEY, Patrick Joseph William, SHELTON, Edward, GAMMACK, Peter David
• Granted Patent: US 9,675,157 B2
• Time in Patent Office: Days
• US Class Current: 34/97
• CPC Class Codes: A45D 20/04 Hot-air producers A45D20/20, A45D20/22 take 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 a body, a fluid flow path extending through the body in an axial direction from a first fluid inlet through which a first fluid flow enters the appliance to a first fluid outlet for emitting the first fluid flow from the appliance, a primary fluid flow path extending from a second fluid inlet through which a primary fluid flow enters the appliance to a second fluid outlet, a section of the primary fluid flow path extending through the body in the axial direction and surrounding the fluid flow path, and a heater located within the section of the primary fluid flow path for heating fluid passing through the primary fluid flow path, and wherein the heater has a length extending in the axial direction.

Claims

1. A hairdryer comprising a body, a fluid flow path extending through the body in an axial direction from a first fluid inlet through which a first fluid flow enters the hairdryer to a first fluid outlet for emitting the first fluid flow from the hairdryer, a primary fluid flow path extending from a second fluid inlet through which a primary fluid flow enters the hairdryer to a second fluid outlet, a section of the primary fluid flow path extending through the body in the axial direction and surrounding the fluid flow path, and a heater located within the section of the primary fluid flow path for heating fluid passing through the primary fluid flow path, and wherein the heater has a length extending in the axial direction.

2. The hairdryer of claim 1, wherein the heater is annular in shape.

3. The hairdryer of claim 1, wherein the heater is tubular in shape.

4. The hairdryer of claim 1, wherein the body comprises a duct extending between the first fluid inlet and the first fluid outlet, and wherein the heater extends about the duct.

5. The hairdryer of claim 4, wherein the duct partially defines at least one of the second fluid inlet and the second fluid outlet.

6. The hairdryer of claim 1, wherein the primary fluid flow path comprises an inlet section and an outlet section, and wherein the heater is located in the outlet section.

7. The hairdryer of claim 6, comprising a duct for conveying fluid from the inlet section to the outlet section.

8. The hairdryer of claim 7, wherein the duct for conveying fluid from the inlet section to the outlet section comprises a handle of the hairdryer.

9. The hairdryer of claim 7, wherein the duct for conveying fluid from the inlet section to the outlet section comprises a fan unit.

10. The hairdryer of claim 1, wherein fluid is drawn through the fluid flow path by the emission of fluid from the primary fluid flow path.

11. The hairdryer of claim 1, wherein the second fluid outlet extends about the fluid flow path.

12. The hairdryer of claim 1, wherein the second fluid outlet is annular.

13. The hairdryer of claim 1, wherein the second fluid outlet is arranged to emit fluid into the fluid flow path.

14. The hairdryer of claim 1, wherein the second fluid outlet extends about the first fluid outlet.

15. The hairdryer of claim 6, wherein, within the body, the outlet section is isolated from the inlet section by at least one wall.

16. The hairdryer of claim 15, wherein said at least one wall is located adjacent to the second fluid inlet.

17. The hairdryer of claim 15, wherein said at least one wall comprises at least two tubular walls located in the body, and an annular wall extending between the tubular walls, and wherein the heater is located between the tubular walls.

18. The hairdryer of claim 15, wherein each of the inlet section and the outlet section is annular in shape.

19. The hairdryer of claim 18, wherein at least part of the inlet section is located behind the outlet section.

20. The hairdryer of claim 18, wherein at least part of the inlet section is located between the outlet section and the fluid flow path.

21. A hand held appliance comprising a body, a fluid flow path extending through the body in an axial direction from a first fluid inlet through which a first fluid flow enters the appliance to a first fluid outlet for emitting the first fluid flow from the appliance, a primary fluid flow path extending from a second fluid inlet through which a primary fluid flow enters the appliance to a second fluid outlet, a section of the primary fluid flow path extending through the body in the axial direction and surrounding the fluid flow path, and a heater located within the section of the primary fluid flow path for heating fluid passing through the primary fluid flow path, and wherein the heater has a length extending in the axial direction.