HAND HELD APPLIANCE

• US 20130276321A1
• Filed: 03/29/2013
• Published: 10/24/2013
• 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, GAMMACK, Peter David, SHELTON, Edward
• Granted Patent: US 9,144,286 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

Abstract

A hand held appliance, such as a hairdryer, includes a body, a fluid flow path extending through the body from a fluid inlet through which a fluid flow enters the appliance to a fluid outlet for emitting the fluid flow from the appliance, a primary fluid flow path extending at least partially through the body from a second fluid inlet through which a primary fluid flow enters the appliance to a second fluid outlet, and a heater located in the body for heating fluid passing through the primary fluid flow path, wherein the heater is inaccessible from the fluid inlet. The heater may be inaccessible from the second fluid inlet. The second fluid inlet may be located in the body. The fluid inlet may be spaced from the second fluid inlet.

Claims

1. A hairdryer comprising a body, a fluid flow path extending through the body from a fluid inlet through which a fluid flow enters the hairdryer to a fluid outlet for emitting the fluid flow from the hairdryer, a primary fluid flow path extending at least partially through the body from a second fluid inlet through which a primary fluid flow enters the hairdryer to a second fluid outlet where the primary flow combines with the fluid flow at or near the fluid outlet of the hairdryer, and a heater located in the body for heating fluid passing through the primary fluid flow path, wherein the heater is inaccessible from the fluid inlet.

2. The hairdryer of claim 1, wherein the heater is inaccessible from the second fluid inlet.

3. The hairdryer of claim 1, wherein the fluid inlet is located in one end of the body.

4. The hairdryer of claim 1, wherein the primary flow combines with the fluid flow near the fluid outlet.

5. The hairdryer of claim 1, wherein the primary fluid flow emits fluid from the hairdryer.

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

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

8. The hairdryer of claim 5, wherein the second fluid outlet extends about the fluid outlet.

9. The hairdryer of claim 1, wherein the primary fluid flow path extends through the body towards an outlet end of the body.

10. The hairdryer of claim 1, wherein the primary fluid flow extends at least partially through the body in the same direction as the fluid flow path.

11. The hairdryer of claim 1, wherein the body comprises a duct extending between the fluid inlet and the fluid outlet, and wherein the heater extends at least partially about the duct.

12. The hairdryer of claim 11, wherein the duct partially defines at least one of the second fluid inlet and the second fluid outlet.

13. The hairdryer of claim 1, wherein the heater is located in the primary fluid flow path.

14. 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.

15. The hairdryer of claim 14, 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 1, wherein a duct is provided, the duct is connected to the body and the primary fluid flow path extends through the duct.

19. The hairdryer of claim 18, wherein the duct comprises a handle of the hairdryer.

20. The hairdryer of claim 18, wherein the duct comprises a fan unit for drawing fluid through the second fluid inlet into the primary fluid flow path.

21. The hairdryer of claim 17, wherein the duct is lined with a material

22. The hairdryer of claim 1, wherein fluid outlet and the second fluid outlet are co-planar.

23. A hand held appliance comprising a body, a fluid flow path extending through the body from a fluid inlet through which a fluid flow enters the appliance to a fluid outlet for emitting the fluid flow from the appliance, a primary fluid flow path extending at least partially through the body from a second fluid inlet through which a primary fluid flow enters the appliance to a second fluid outlet where the primary flow combines with the fluid flow at or near the fluid outlet of the appliance, and a heater located in the body for heating fluid passing through the primary fluid flow path, wherein the heater is inaccessible from the fluid inlet.