Hand held appliance

Patent metadata

Field	Value
Publication number	US-2016220004-A1
Application number	US-201414903047-A
Country	US
Kind code	A1
Filing date	Jun 13, 2014
Priority date	Jul 5, 2013
Publication date	Aug 4, 2016
Grant date	—

Abstract

A hair care appliance including, a body, a heater, a PCB and a primary fluid flow path extending from a primary fluid inlet into the appliance to a primary fluid outlet out of the body wherein the PCB and heater are in fluid communication with the primary fluid flow path and the PCB is upstream of the heater. A fan unit may be provided and the fan unit is upstream of the heater and may be upstream or downstream of the PCB. A thermal barrier may be provided between the PCB and the heater. The thermal barrier may be in thermal communication with the PCB and functions as a heat sink for the PCB.

First claim

1 . A hair care appliance comprising: a body, a heater, a printed circuit board (PCB) and a primary fluid flow path extending from a primary fluid inlet into the appliance to a primary fluid outlet out of the body wherein the PCB and the heater are in fluid communication with the primary fluid flow path the PCB is upstream of the heater, and a thermal barrier is provided between the PCB and the heater.

2 . The appliance of claim 1 , comprising a fan unit that is upstream of the heater.

3 . The appliance of claim 1 , comprising a fan unit that is upstream of the PCB.

4 . The appliance of claim 1 , comprising wherein a fan unit that is downstream of the PCB.

5 . The appliance of claim 1 , wherein the thermal barrier is in thermal communication with the PCB and functions as a heat sink for the PCB.

6 . The appliance of claim 1 , wherein the thermal barrier is aluminum or an alloy of aluminum.

7 . A hair care appliance comprising: a body, a heater, a fan unit, a PCB and a primary fluid flow path extending from a primary fluid inlet into the appliance to a primary fluid outlet out of the body wherein the PCB and the heater are in fluid communication with the primary fluid flow path the PCB is upstream of the heater, and the fan unit is downstream of the PCB.

8 . The appliance of claim 1 , wherein the body includes a handle portion upstream of the heater.

9 . The appliance of claim 8 , wherein the primary fluid inlet is in the handle portion.

10 . The appliance of claim 8 , wherein the primary fluid flow path extends linearly through the body.

11 . The appliance of claim 1 , comprising a fluid flow path extending from a fluid inlet into the body to a fluid outlet out of the body.

12 . A hair care appliance comprising: a body, a heater, a PCB, a primary fluid flow path extending from a primary fluid inlet into the appliance to a primary fluid outlet out of the body and a fluid flow path extending from a fluid inlet into the body to a fluid outlet out of the body wherein the PCB and the heater are in fluid communication with the primary fluid flow path and the PCB is upstream of the heater.

13 . The appliance of claim 12 , wherein the body comprises a duct extending along the body from the fluid inlet to the fluid outlet and the duct extends about the fluid flow path.

14 . The appliance of claim 13 , wherein the PCB extends at least partially around the duct.

15 . The appliance of claim 13 , wherein the primary fluid flow path extends at least partially along the duct.

16 . The appliance of claim 15 , wherein within the body the primary fluid flow path is generally annular.

17 . The appliance of claim 11 , wherein the appliance comprises a handle attached to and extending from the body and the primary fluid inlet is in the handle.

18 . The appliance of claim 17 , wherein the handle is substantially orthogonal to the body.

19 . The appliance of claim 17 , wherein within the handle the primary fluid flow path is generally circular.

20 . The appliance of claim 17 , wherein primary fluid flows through the handle in a first direction and in the body in a second direction.

21 . The appliance of claim 20 , wherein a flow plate is provided in the primary fluid flow path to direct primary flow from the first direction to the second direction.

22 . The appliance of claim 21 , wherein the flow plate comprises at least one aperture.

23 . The appliance of claim 22 , wherein the at least one aperture enables fluid to flow through the flow plate to the PCB.

24 . The appliance of claim 21 , wherein the flow plate is connected to the PCB.

25 . The appliance of claim 21 , wherein the flow plate additionally directs primary fluid flow around the PCB.

26 . The appliance of claim 21 , wherein the flow plate is additionally one or more of a thermal barrier, a heat sink and a deflector plate for the PCB.

27 . The appliance of claim 21 , wherein the flow plate deflects the primary flow around the duct from a circular flow to an annular flow.

28 . The appliance of claim 21 , wherein where the primary flow enters the body there is a region of relatively high velocity flow.

29 . The appliance of claim 28 , wherein the PCB comprises components extending outwards from a board by different amounts and the components are arranged such that components that extend further out from the board are positioned radially away from the region of relatively high velocity flow.

30 . The appliance of claim 29 , wherein at least some of the components that extend further out from the board are capacitors.

31 . The appliance of claim 29 , wherein components that extend less distance from the board are positioned in the region of relatively high velocity flow.

32 . The appliance of claim 1 , wherein the thermal barrier is additionally a deflector plate for deflecting debris from the PCB away from the primary fluid flow path and the primary fluid outlet.

Assignees

• Dyson Technology Ltd

Inventors

• Moloney Patrick Joseph William
• Gosnay Anthony Thomas
• Harrod Nicholas Stuart
• Tweedie Robert Lawrence
• Wilkinson Christopher Daniel
• Courtney Stephen Benjamin

Classifications

• A45D20/52

  Hair-drying combs or hair-drying brushes, adapted for heating by an external heating source {, e.g. air stream} · CPC title

• A45D20/50

  and provision for an air stream · CPC title

• A45D20/12 Primary

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

• A45D20/10 Primary

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

• A45D20/48

  Hair-drying combs or hair-drying brushes, with internal heating means · CPC title