GB2249026A - Drier - Google Patents

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Publication number
GB2249026A
GB2249026A GB9022375A GB9022375A GB2249026A GB 2249026 A GB2249026 A GB 2249026A GB 9022375 A GB9022375 A GB 9022375A GB 9022375 A GB9022375 A GB 9022375A GB 2249026 A GB2249026 A GB 2249026A
Authority
GB
United Kingdom
Prior art keywords
air
plenum chamber
slot
working volume
blower
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9022375A
Other versions
GB9022375D0 (en
Inventor
William Leonard Ratty
Original Assignee
William Leonard Ratty
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by William Leonard Ratty filed Critical William Leonard Ratty
Priority to GB9022375A priority Critical patent/GB2249026A/en
Publication of GB9022375D0 publication Critical patent/GB9022375D0/en
Publication of GB2249026A publication Critical patent/GB2249026A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47KSANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00Body-drying implements; Toilet paper; Holders therefor
    • A47K10/48Drying by means of hot air

Abstract

A drier is made up of a body having a slot allowing access by an object, such as a hand H, to be dried in a working volume 15 within the body; a plenum chamber 17 located at least part way around a periphery of the working volume; an air blade or knife slot orifice 20 communicating the plenum chamber with the periphery of the working volume; an air blower; and ducting 21 linking the plenum chamber to an outlet from the blower. The blower, ducting and slot orifice are combined to enable sufficient pressure energy to be applied to air in the plenum chamber on the upstream side of the slot orifice such that it is displaced through the slot and the pressure energy is substantially converted into kinetic energy with air speeds of the order of 800 km/hour about 10 mm downstream of the slot in the working volume. <IMAGE>

Description

DRIER This invention relates to a drier and particularly one for use in drying hands.

A hand drier is known in which a stream of hot air is directed from a nozzle into a work space in which wet hands to be dried are placed and rubbed together to spread water over the hands. The water is removed by a process of evaporation and a degree of discomfort can be experienced.

This can arise areas on the hands are dried unevenly since a dry area subject to further heating while a nearby wet area is subjected to the hot air stream can generate a degree of discomfort.

A drier of this type requires the provision in as small a housing as possible of a blower and an electric heating element ducted to transfer heat to air displaced through the housing by way of the blower. The blower and heater need to be able to provides a sufficient flow of warm enough air to ensure that a users hands are dried, substantially by evaporation, in a reasonable time. Given that such a time is about thirty seconds it has been found that a heating element of 2.5 kilowatt capacity is needed together with a blower able to displace about 70 litres per second. The requirement for sufficient power for blowing and heating in a small housing leads to the further need for safety devices to be included to ensure safe operation in public usage.The use of such a device in a confined space with inadequate ventilation results in a hot damp atmosphere which can be oppressive to another person having to remain in the vicinity.

According to a first aspect of the present invention there is provided a method of drying comprising the steps of: 1 establishing a working volume about an object, such as a hand, to be dried; 2 locating at least a part of a periphery of the working volume a plenum chamber; 3 linking the interior of the plenum chamber to the working volume by means of an air blade or knife slot orifice; 4 pressurising air in the plenum chamber to provide sufficient pressure energy so as to cause the flow of air through the slot orifice with a conversion of pressure energy to kinetic energy resulting in air speeds of the order of 800 km/hour about 10 mm downstream of the slot in the working volume.

According to a second aspect of the present invention there is provided a drier comprising: 1 a body having a slot allowing access by an object, such as a hand, to be dried to a working volume within the body; 2 a plenum chamber located at least part way around a periphery of the working volume; 3 an air blade or knife slot orifice communicating the plenum chamber with the periphery of the working volume; and 4 an air blower; and 5 ducting linking the plenum chamber to an outlet from the blower; and the blower, ducting and slot orifice being adapted to enable sufficient pressure energy to be applied to air in the plenum chamber on the upstream side of the slot orifice such that it is displaced through the slot and the pressure energy is substantially converted into kinetic energy with air speeds of the order of 800 km/hour about 10 mm downstream of the slot in the working volume.

Typically a drier according to the second aspect of the present invention is characterised by the provision of an auxiliary heater to heat air either on its way to, or within, the plenum chamber.

By using an air knife in this way it has been possible to dry a hand in a very short period of time (of the order of a few seconds) without needing to utilise heated air. Drying is by displacing any moisture left on the hand by the air blade rather than using a hot air stream to promote drying by evaporation. The displaced moisture is not vapourised but projected from a hand being dried until it meets an obstruction, such as a wall of the working chamber,- from which it is collected and passed to a liquid water drain.

An exemplary embodiment of the invention will now being described with reference to the accompanying drawing which is a diagram of a hand drier of which: Figure 1 is a perspective view; and Figure 2 is a sectional side view; and Figure 3 shows in more detail a part of Figure 2.

Figures 1 and 2 variously show a hand basin 11 mounted on a wall 12. A hand drier 13 is secured to the wall above the hand basin 11. Figure 3 is a sectional view of the drier 13 in more detail. It comprises a housing 14 shrouding a working volume 15 into which a hand for drying can be inserted by way of entry 16.

The working volume has a plenum chamber 17 positioned around periphery 18 of the working volume 15 into which interior 19 of the chamber 17 opens by way of a slot orifice 20 with a slot width of 1.5 mm and extending round the major part of the periphery 18.

The plenum 17 is pressurised through duct 21 by way of a blower 22 powered by an electric motor 23. The motor 23 is energised in response to a time switch 24 which operates when proximity sensor 25 detects the presence of a hand in the working volume 15. The blower 22 and the motor 23 are positioned on the opposite side of the wall 12 to the handbasin 11 so that any noise generated during operation of the blower 22 and motor 23 is to a great extent isolated from the vicinity of the hand basin 11. For use in locations where a number of hand drier units are to be used a single blower and motor installation can be used to power all the hand driers.

Referring now more particularly to Figure 3 to use the dryer 13 a hand H is inserted in entry 16 in the direction of arrow D. This causes the motor 23 (Figure 2) to be energised causing blower 22 pressurised air to be fed through duct 21 to the plenum chamber 17. Pressurised air thereafter passes through slot orifice 20 giving up pressure energy for kinetic energy and issuing as an 'air blade' in which the air reaches a velocity of about 800 km/hr at a position about 10 mm into the working volume 15. The fast moving air blade sweeps any surface moisture, or indeed any deposit including powder, dust, grease or ointment, from hand H and drives it against a peripheral area of the working volume. Liquids carried off in this way are collected and drained out of the housing into the hand basin 11.

The specific embodiment refers to a hand drier. However a similar device can be used for drying other parts of the body given that the slot orifice from which the air blade issues can be brought close enough to the part to be dried. The proposed device would be suitable for a number of drying! cleaning applications. It is envisaged the device would be particularly useful in a medical or surgical context where a need arises to clear debris from a wound and where it would be inappropriate to wipe or wash the wound.

Claims (5)

CLAIMS 1A method of drying comprising the steps of: 1 establishing a working volume about an object, such as a hand, to be dried; 2 locating at the periphery of the working volume a plenum chamber; 3 locating an air blade or knife slot orifice between the plenum chamber and the working volume; 4 applying to the plenum chamber by way of a blower a volume of air with sufficient pressure energy to cause the flow of air through the slot orifice to result in the conversion of pressure energy to kinetic energy with air speeds of the order of 800 km/hour about 10 mm downstream of the slot in the working volume. 2 A drier comprising: 1 a body having a slot allowing access by an object, such as a hand, to be dried to a working volume within the body; 2 a plenum chamber located at least part way around a periphery of the working volume; 3 an air blade or knife slot orifice communicating the plenum chamber with the periphery of the working volume; and 4 an air blower; and 5 ducting linking the plenum chamber to an outlet from the blower; the blower, ducting and slot orifice being adapted to enable sufficient pressure energy to be applied to air in the plenum chamber on the upstream side of the slot orifice such that it is displaced through the slot and the pressure energy is substantially converted into kinetic energy with air speeds of the order of 800 km/hour about 10 mm downstream of the slot in the working volume. 3 : A drying system comprising an array of two or more driers each drier comprising
1 a body having a slot allowing access by an object, such as a hand, to be dried to a working volume within the body;
2 a plenum chamber located at least part way around a periphery of the working volume;
3 an air blade or knife slot orifice communicating the plenum chamber with the periphery of the working volume; and
4 ducting linking the plenum chamber to an outlet from;
5 A drier as hereinbefore described with reference to and as illustrated in the accompanying drawings.
5 an air blower common to each drier in the array; the blower, ducting and slot orifice being adapted to enable sufficient pressure energy to be applied to air in the plenum chamber on the upstream side of the slot orifice such that it is displaced through the slot and the pressure energy is substantially converted into kinetic energy with air speeds of the order of 800 km/hour about 10 mm downstream of the slot in the working volume.
4 A drier as claimed in Claim 2 or Claim 3 characterised by the provision of an auxiliary heating means whereby the temperature of air either on passage to, or within, the plenum chamber can be raised above ambient air temperature.
GB9022375A 1990-10-16 1990-10-16 Drier Withdrawn GB2249026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9022375A GB2249026A (en) 1990-10-16 1990-10-16 Drier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9022375A GB2249026A (en) 1990-10-16 1990-10-16 Drier

Publications (2)

Publication Number Publication Date
GB9022375D0 GB9022375D0 (en) 1990-11-28
GB2249026A true GB2249026A (en) 1992-04-29

Family

ID=10683747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9022375A Withdrawn GB2249026A (en) 1990-10-16 1990-10-16 Drier

Country Status (1)

Country Link
GB (1) GB2249026A (en)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0589568A1 (en) * 1992-08-25 1994-03-30 Mitsubishi Denki Kabushiki Kaisha Hand dryer
DE9407229U1 (en) * 1994-04-30 1995-06-14 Lepel Barbara Freifrau Von Warm air hand dryer
GB2332145A (en) * 1997-11-06 1999-06-16 Airdri Ltd Hand dryer
GB2412863A (en) * 2004-04-01 2005-10-12 Anthony Exton Gardner Hand dryer mounted on a panel, with base unit mounted behind and air dispensing unit above said panel
WO2006042896A1 (en) 2004-10-18 2006-04-27 Veltek Europe, S.L. Hand dryer
GB2428570A (en) * 2005-07-30 2007-02-07 Dyson Technology Ltd Drying apparatus having at least one slot-like opening
GB2428569A (en) * 2005-07-30 2007-02-07 Dyson Technology Ltd Hand Dryer
WO2007015039A1 (en) * 2005-07-30 2007-02-08 Dyson Technology Limited Drying apparatus
WO2007015040A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Drying apparatus
WO2007015041A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Drying apparatus
WO2007015042A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Dryer
WO2007080412A1 (en) 2006-01-12 2007-07-19 Dyson Technology Limited Drying apparatus
US7946055B2 (en) 2005-07-30 2011-05-24 Dyson Technology Limited Dryer
FR2976474A1 (en) * 2011-06-20 2012-12-21 J V D S A S dryer speakerphone
US8347522B2 (en) 2005-07-30 2013-01-08 Dyson Technology Limited Drying apparatus
GB2505863A (en) * 2012-07-06 2014-03-19 Peter Fraenkel Ltd Hand Dryer Apparatus
US8950019B2 (en) 2007-09-20 2015-02-10 Bradley Fixtures Corporation Lavatory system
US8997271B2 (en) 2009-10-07 2015-04-07 Bradley Corporation Lavatory system with hand dryer
US9267736B2 (en) 2011-04-18 2016-02-23 Bradley Fixtures Corporation Hand dryer with point of ingress dependent air delay and filter sensor
EP2487110A3 (en) * 2011-02-10 2016-06-22 Airbus Operations GmbH Hand drying device and washing stand for an aircraft
US9486118B2 (en) 2011-05-17 2016-11-08 Dyson Technology Limited Fixture for a sink
US9758953B2 (en) 2012-03-21 2017-09-12 Bradley Fixtures Corporation Basin and hand drying system
US9982422B2 (en) 2011-05-17 2018-05-29 Dyson Technology Limited Fixture for a sink
US10041236B2 (en) 2016-06-08 2018-08-07 Bradley Corporation Multi-function fixture for a lavatory system
US10100501B2 (en) 2012-08-24 2018-10-16 Bradley Fixtures Corporation Multi-purpose hand washing station
US10165908B1 (en) * 2017-09-06 2019-01-01 Hokwang Industries Co., Ltd. Hand dryer with reduced air-intake noise

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459944A (en) * 1992-08-25 1995-10-24 Mitsubishi Denki Kabushiki Kaisha Hand dryer
EP0589568A1 (en) * 1992-08-25 1994-03-30 Mitsubishi Denki Kabushiki Kaisha Hand dryer
DE9407229U1 (en) * 1994-04-30 1995-06-14 Lepel Barbara Freifrau Von Warm air hand dryer
GB2332145A (en) * 1997-11-06 1999-06-16 Airdri Ltd Hand dryer
GB2332145B (en) * 1997-11-06 2002-02-20 Airdri Ltd Dryer
GB2412863B (en) * 2004-04-01 2007-05-02 Anthony Exton Gardner Hand dryer
GB2412863A (en) * 2004-04-01 2005-10-12 Anthony Exton Gardner Hand dryer mounted on a panel, with base unit mounted behind and air dispensing unit above said panel
WO2006042896A1 (en) 2004-10-18 2006-04-27 Veltek Europe, S.L. Hand dryer
US7555209B2 (en) 2004-10-18 2009-06-30 Jorge Pradas Diez Hand dryer
US8341853B2 (en) 2005-07-30 2013-01-01 Dyson Technology Limited Drying apparatus
WO2007015043A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Dryer
WO2007015040A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Drying apparatus
WO2007015041A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Drying apparatus
WO2007015042A1 (en) 2005-07-30 2007-02-08 Dyson Technology Limited Dryer
WO2007015039A1 (en) * 2005-07-30 2007-02-08 Dyson Technology Limited Drying apparatus
US8490291B2 (en) 2005-07-30 2013-07-23 Dyson Technology Limited Dryer
GB2428569B (en) * 2005-07-30 2009-04-29 Dyson Technology Ltd Dryer
GB2428569A (en) * 2005-07-30 2007-02-07 Dyson Technology Ltd Hand Dryer
AU2006274709B2 (en) * 2005-07-30 2010-08-19 Dyson Technology Limited Drying apparatus
AU2006274711B2 (en) * 2005-07-30 2010-12-02 Dyson Technology Limited Dryer
AU2006274709C1 (en) * 2005-07-30 2010-12-23 Dyson Technology Limited Drying apparatus
CN101232835B (en) 2005-07-30 2011-01-26 戴森技术有限公司 Drying apparatus
GB2428570A (en) * 2005-07-30 2007-02-07 Dyson Technology Ltd Drying apparatus having at least one slot-like opening
US7946055B2 (en) 2005-07-30 2011-05-24 Dyson Technology Limited Dryer
US8347522B2 (en) 2005-07-30 2013-01-08 Dyson Technology Limited Drying apparatus
CN101232836B (en) 2005-07-30 2011-04-06 戴森技术有限公司 Drying apparatus
US8155508B2 (en) 2006-01-12 2012-04-10 Dyson Technology Limited Drying apparatus
WO2007080412A1 (en) 2006-01-12 2007-07-19 Dyson Technology Limited Drying apparatus
US8950019B2 (en) 2007-09-20 2015-02-10 Bradley Fixtures Corporation Lavatory system
US8997271B2 (en) 2009-10-07 2015-04-07 Bradley Corporation Lavatory system with hand dryer
EP2487110A3 (en) * 2011-02-10 2016-06-22 Airbus Operations GmbH Hand drying device and washing stand for an aircraft
US9441885B2 (en) 2011-04-18 2016-09-13 Bradley Fixtures Corporation Lavatory with dual plenum hand dryer
US9267736B2 (en) 2011-04-18 2016-02-23 Bradley Fixtures Corporation Hand dryer with point of ingress dependent air delay and filter sensor
US9486118B2 (en) 2011-05-17 2016-11-08 Dyson Technology Limited Fixture for a sink
US9982422B2 (en) 2011-05-17 2018-05-29 Dyson Technology Limited Fixture for a sink
FR2976474A1 (en) * 2011-06-20 2012-12-21 J V D S A S dryer speakerphone
EP2720596B1 (en) 2011-06-20 2015-07-29 J.V.D. S.A.S. Hand dryer
WO2012175860A1 (en) 2011-06-20 2012-12-27 J.V.D. S.A.S. Hand dryer
US9758953B2 (en) 2012-03-21 2017-09-12 Bradley Fixtures Corporation Basin and hand drying system
GB2505863B (en) * 2012-07-06 2019-02-13 Peter Fraenkel Ltd Hand drying apparatus
GB2505863A (en) * 2012-07-06 2014-03-19 Peter Fraenkel Ltd Hand Dryer Apparatus
US10100501B2 (en) 2012-08-24 2018-10-16 Bradley Fixtures Corporation Multi-purpose hand washing station
US10041236B2 (en) 2016-06-08 2018-08-07 Bradley Corporation Multi-function fixture for a lavatory system
US10165908B1 (en) * 2017-09-06 2019-01-01 Hokwang Industries Co., Ltd. Hand dryer with reduced air-intake noise

Also Published As

Publication number Publication date
GB9022375D0 (en) 1990-11-28

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)