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Hand held appliance

a hand-held, appliance technology, applied in air heaters, lighting and heating apparatus, apparel and other directions, can solve the problems of fluid passing, pressure loss within the appliance, recirculating within the space, etc., to reduce fluid leakage, reduce stray fluid flow, and mitigate the ingress of ducts

Inactive Publication Date: 2016-11-24
DYSON TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a design for a fan that has two walls, an inner and an outer, for several reasons. First, it reduces vibrations and noise from the fan. The fan is placed inside the inner wall, making it more secure and aesthetically pleasing. The outer wall is formed as a tube without any join lines, which makes it easier to build. The inner wall is also made up of two parts, which makes it easier to assemble and attach the outer wall. Additionally, the design also combines the functions of two seals, which helps to prevent the outer wall from rocking or pivoting with relation to the inner wall.

Problems solved by technology

In the arrangement of having an outer wall and an inner wall, there is an issue with fluid passing in the space between the outer wall and the inner wall and recirculating within this space.
Any recirculation causes pressure losses within the appliance and impacts the velocity and volume of fluid exiting the appliance.

Method used

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Examples

Experimental program
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Embodiment Construction

[0032]FIGS. 1, 2 and 3 show a hairdryer 10 with a handle 20 and a body 30. The handle has a first end 22 which is connected to the body 30 and a second end 24 distal from the body 30 and which includes a primary fluid inlet 40. Power is supplied to the hairdryer 10 via a cable 50. At a distal end of the cable 50 from the hairdryer 10 a plug (not shown) is provided, the plug may provide electrical connection to mains power or to a battery pack for example.

[0033]The handle 20 has an outer wall 200 which extends from the body 30 to a distal end 24 of the handle. At the distal end 24 of the handle an end wall 210 extends across the outer wall 200. The cable 50 enters the hairdryer through this end wall 210. The primary fluid inlet 40 in the handle 20 includes first apertures that extend around and along 42 the outer wall 200 of the handle and second apertures that extend across 46 and through the end wall 210 of the handle 20. The cable 50 is located approximately in the middle of the e...

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PUM

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Abstract

A hand held appliance comprising an outer wall, an inner wall, a fluid flow path extending within the inner wall from a fluid inlet into the appliance to a fluid outlet, a fan unit disposed within the inner wall for drawing fluid in through the fluid inlet and a seal disposed between the outer wall and the inner wall. Fluid in the fluid flow path may flow from the fluid inlet to an upstream end of the fan unit, through the fan unit to a downstream end of the fan unit and on to a fluid outlet. The seal may be downstream of the fluid inlet. The seal may be downstream of the fan unit. The outer wall may comprise a handle of the appliance. The seal may comprise an o-ring, a lip seal or any over moulded seal.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application claims the priority of United Kingdom Application No. 1508810.7, filed May 22, 2015, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to hand held appliance and in particular a hair care appliance.BACKGROUND OF THE INVENTION[0003]Generally, a motor and fan are provided which draw fluid into a body; the fluid may be heated prior to exiting the body. The motor is susceptible to damage from foreign objects such as dirt or hair so conventionally a filter is provided at the fluid inlet to the blower. The fan and heater require power in order to function and this is provided via internal wiring from either a mains power cable or batteries attached to the appliance.SUMMARY OF THE INVENTION[0004]Embodiments of the invention provide a hand held appliance comprising an outer wall, an inner wall, a fluid flow path extending within the inner wall from a fluid inlet into th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A45D20/10
CPCA45D20/10A45D20/12A45D20/122F24H3/04F24H3/0423
Inventor ATKINSON, ANTOINE FRANCOISHEDGES, CHRISTOPHER WILLIAM
Owner DYSON TECH LTD
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