Hand held appliance

Inactive Publication Date: 2017-06-15
DYSON TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Aspects of the invention provide an alternative solution that does not cause the size of the product to be incre

Problems solved by technology

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.
However, if the flow rate is increased there is usually a drop in the temperature of the fluid that exits the hairdryer that can be perceived by the user.
There can be an electrical failure of some sort; alternatively dust and dirt can be pulled into the heater element and if this builds up it can burn and cause an increase in the temperature of the fluid exiting the hairdryer.
Obviously, thermal protection is provided in the form of thermal cut outs such as thermal fuses or bi-metallic

Method used

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  • Hand held appliance
  • Hand held appliance
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032]FIGS. 1 and 2 show an example of hairdryer 10 with a handle 20 and a body 30 suitable for use with a thermistor according to the invention. 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 towards 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 in a series of rows and / or columns that extend from the distal end 24 of t...

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PUM

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Abstract

A hair care appliance that includes a body, a fluid flow path extending from a fluid inlet into the appliance to a fluid outlet from the body, a heater for heating fluid in the fluid flow path, a pre-heater located upstream of the heater and a thermal safety device positioned between the pre-heater and the heater. The pre-heater may include a resistive element. The pre-heater may be electrically connected to the heater via a heater circuit. The thermal safety device may be electrically connected to the heater via the heater circuit. When the appliance is activated, fluid may flow from the fluid inlet through the pre-heater, past the thermal safety device, through the heater and on to the fluid outlet. The thermal safety device may extend orthogonal to a longitudinal axis A-A of the body.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application claims the priority of United Kingdom Application No. 1521694.8, filed Dec. 9, 2015, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to a handheld appliance and in particular a hair care appliance such as a hairdryer.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.[0004]Conventional hairdryers have control buttons which can change one or more of the flow rate and the temperature of the fluid that exits the hairdryer. However, if the flow rate is ...

Claims

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Application Information

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IPC IPC(8): A45D20/10A45D20/12
CPCA45D20/12A45D20/10A45D20/124H01H37/00H02H9/00
Inventor LAVENI, PIERPAOLORE, RENZOHEWITT, JAMES RICHARD WARRENCOULTON, ROBERT MARK BRETT
Owner DYSON TECH LTD
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