EP1909625B1 - Appareil de sechage - Google Patents

Appareil de sechage Download PDF

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Publication number
EP1909625B1
EP1909625B1 EP06744146A EP06744146A EP1909625B1 EP 1909625 B1 EP1909625 B1 EP 1909625B1 EP 06744146 A EP06744146 A EP 06744146A EP 06744146 A EP06744146 A EP 06744146A EP 1909625 B1 EP1909625 B1 EP 1909625B1
Authority
EP
European Patent Office
Prior art keywords
slot
openings
drying apparatus
width
cavity
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.)
Active
Application number
EP06744146A
Other languages
German (de)
English (en)
Other versions
EP1909625A1 (fr
Inventor
John Churchill
James Dyson
Peter David Gammack
Paul Cedric Campbell Hackwell
Roy Macnaughton
Frederic Nicolas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dyson Technology Ltd
Original Assignee
Dyson Technology Ltd
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
Priority claimed from GBGB0515750.8A external-priority patent/GB0515750D0/en
Application filed by Dyson Technology Ltd filed Critical Dyson Technology Ltd
Publication of EP1909625A1 publication Critical patent/EP1909625A1/fr
Application granted granted Critical
Publication of EP1909625B1 publication Critical patent/EP1909625B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/48—Drying by means of hot air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B19/00—Machines or apparatus for drying solid materials or objects not covered by groups F26B9/00 - F26B17/00
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K2210/00—Combinations of water taps, soap dispensers and hand dryers

Definitions

  • the invention relates to drying apparatus which makes use of a narrow jet of high velocity, high pressure air to dry an object, including part of the human body.
  • the invention relates to a hand dryer in which the air jet is emitted through a slot-like opening in the casing of the hand dryer.
  • the invention provides hand drying apparatus having a casing, a cavity formed in the casing for receiving an object, a fan located in the casing and capable of creating an airflow, two opposed slot-like openings communicating with the fan and arranged in opposing sides of the casing so as to direct an airflow transversely across the cavity, characterised in that the two slot-like openings have different widths and the maximum width being no greater than 1.0 mm.
  • the momentum of the airflow emitted through the opening is greatly increased in comparison to that of the prior art devices.
  • the distribution of the airflow along the slot-like openings is also comparatively even when compared to the prior art.
  • each slot-like opening has a constant width, more preferably one slot-like opening has a width of at least 0.3mm and advantageously no more than 0.4mm. These preferred dimensions provide the airflow with a particularly effective level of momentum.
  • the width of the slot-like opening in the front wall of the cavity is smaller than the width of the slot-like opening in the rear wall of the cavity. This arrangement allows a greater proportion of the airflow to be emitted onto the backs of the user's hands which enhances the drying process.
  • one slot-like opening has a width which varies along its length, with the maximum width being greatest at the centre of the slot-like opening.
  • the maximum width of the slot-like opening is preferably no more than twice the minimum width. This provides an arrangement in which a larger mass of air is emitted from the centre of the slot-like opening which is advantageous when the slot-like openings are provided in a hand dryer.
  • the hand dryer 10 shown in Figures 1 to 6 comprises an outer casing 12 having a front wall 14, a rear wall 16, an upper face 18 and side walls 20, 22.
  • the rear wall 16 can incorporate fixing devices (not shown) for securing the hand dryer 10 to a wall or other structure prior to use.
  • An electrical connection (not shown) is also provided on the rear wall or elsewhere on the casing 12.
  • a cavity 30 is formed in the upper part of the casing 12 as can be seen from Figures 1 and 2 .
  • the cavity 30 is open at its upper end and delimited thereat by the top of the front wall 14 and the front of the upper face 18.
  • the space between the top of the front wall 14 and the front of the upper face 18 forms a cavity entrance 32 which is sufficiently wide to allow a user's hands to be introduced to the cavity 30 through the cavity entrance 32.
  • the cavity 30 is also open to the sides of the hand dryer 10 by appropriate shaping of the side walls 20, 22.
  • the cavity 30 has a front wall 34 and a rear wall 36 which delimit the cavity 30 to the front and rear respectively.
  • a drain 38 Located in the lowermost end of the cavity 30 is a drain 38 which communicates with a reservoir (not shown) located in the lower part of the casing 12. The purpose of the drain and reservoir will be described below.
  • a fan 40 which is driven by a motor (not shown), is located inside the casing 12.
  • the motor is connected to the electrical connection and is controlled by a controller 41.
  • the inlet 42 of the fan 40 communicates with an air inlet 44 formed in the casing 12.
  • a filter 46 is located in the air passageway connecting the air inlet 44 to the fan inlet 42 so as to prevent the ingress of any debris which might cause damage to the motor or the fan 40.
  • the outlet of the fan 40 communicates with a pair of air ducts 50, 52 which are located inside the casing 12.
  • the front air duct 50 is located primarily between the front wall 14 of the casing 12 and the front wall 34 of the cavity 30, and the rear air duct 52 is located primarily between the rear wall 16 of the casing 12 and the rear wall 36 of the cavity 30.
  • the air ducts 50, 52 are arranged to conduct air from the fan 40 to a pair of opposed slot-like openings 60, 62 which are located in the front and rear walls 34, 36 respectively of the cavity 30.
  • the slot-like openings 60, 62 are arranged at the upper end of the cavity 30 in the vicinity of the cavity entrance 32.
  • the slot-like openings 60, 62 are each configured so as to direct an airflow generally across the cavity entrance 32 towards the opposite wall of the cavity 30.
  • the slot-like openings 60, 62 are offset in the vertical direction and angled towards the lowermost end of the cavity 30.
  • Figure 4 shows the upper ends of the air ducts 50, 52 and the slot-like openings 60, 62 in greater detail.
  • the walls 54a, 54b of the air duct 50 converge to form the slot-like opening 60 and the walls 56a, 56b of the air duct 52 converge to form the slot-like opening 62.
  • Figures 5 and 6 show that the slot-like opening 60 has a width of W1 and Figure 6 shows that the slot-like opening 62 has a width of W2.
  • the width W1 of the slot-like opening 60 is smaller than the width W2 of the slot-like opening 62.
  • the width W1 is 0.3mm and the width W2 is 0.4mm. In this embodiment, both widths W1 and W2 are constant across the length of each respective slot-like opening.
  • Sensors 64 are positioned in the front and rear walls 34, 36 of the cavity 30 immediately below the slot-like openings 60, 62. These sensors 64 detect the presence of a user's hands which are inserted into the cavity 30 via the cavity entrance 32 and are arranged to send a signal to the motor when a user's hands are introduced to the cavity 30. As can be seen from Figures 1 and 3 , the walls 54a, 54b, 56a, 56b of the ducts 50, 52 project slightly beyond the surface of the front and rear walls 34, 36 of the cavity 30.
  • the inward projection of the walls 54a, 54b, 56a, 56b of the ducts 50, 52 reduces the tendency of the user's hands to be sucked towards one or other of the walls 34, 36 of the cavity, which enhances the ease with which the hand dryer 10 can be used.
  • the positioning of the sensors 64 immediately below the inwardly projecting walls 54a, 54b, 56a, 56b of the ducts 50, 52 also reduces the risk of the sensors 64 becoming dirty and inoperative.
  • the shape of the cavity entrance 32 is such that the front edge 32a is generally straight and extends laterally across the width of the hand dryer 10.
  • the rear edge 32b has a shape which consists of two curved portions 33 which generally follow the shape of the backs of a pair of human hands as they are inserted downwardly into the cavity 30 through the cavity entrance 32.
  • the rear edge 32b of the cavity entrance 32 is substantially symmetrical about the centre line of the hand dryer 10. The intention of the shaping and dimensioning of the front and rear edges 32a, 32b of the cavity entrance 32 is that, when a user's hands are inserted into the cavity 30 through the cavity entrance 32, the distance from any point on the user's hands to the nearest slot-like opening is substantially uniform.
  • the hand dryer 10 described above operates in the following manner.
  • the sensors 64 detect the presence of the user's hands and send a signal to the motor to drive the fan 40.
  • the fan 40 is thus activated and air is drawn into the hand dryer 10 via the air inlet 44 at a rate of approximately 20 to 40 litres per second and preferably at a rate of least 25 to 27 litres per second, more preferably air is drawn into the hand dryer 10 at a rate of 31 to 35 litres per second.
  • the air passes through the filter 46 and along the fan inlet 42 to the fan 40.
  • the airflow leaving the fan 40 is divided into two separate airflows; one passing along the front air duct 50 to the slot-like opening 60 and the other passing along the rear air duct 52 to the slot-like opening 62.
  • the airflow is ejected from the slot-like openings 60, 62 in the form of very thin, stratified sheets of high velocity, high pressure air.
  • the air pressure is at least 15 kPa and preferably approximately 22 to 23 kPa.
  • the speed of the airflow leaving the slot-like openings 60, 62 is at least 80 m/s and preferably at least 100 or 150 m/s, more preferably approximately 180m/s. Because the size of the slot-like opening 62 located at the end of the rear duct 52 is greater than the size of the slot-like opening 60 located at the end of the front duct 50, a larger volume of air is emitted from the duct 52 than from the duct 50. This provides a greater mass of air for drying the backs of the user's hands which is advantageous.
  • the two thin sheets of stratified, high velocity, high pressure air are directed towards the surfaces of the user's hands which, during use, are inserted fully into the cavity 30 and are subsequently withdrawn from the cavity 30 via the cavity entrance 32.
  • the sheets of air blow any existing water off the user's hands. This is achieved reliably and effectively because of the high momentum of the air leaving the slot-like openings 60, 62 and because the airflow is evenly distributed along the length of each slot-like opening 60, 62.
  • Each stratified sheet of air is directed towards the wall of the cavity 30 which is remote from the slot-like opening through which the respective sheet of air is emitted. Because the slot-like openings 60, 62 are also inclined towards the lowermost end of the cavity 30, the emitted airflows are directed into the cavity 30. This reduces the risk of turbulent air movement being felt by the user outside the casing, eg in the user's face.
  • the water removed by the airflows is collected inside the cavity 30.
  • Each airflow will rapidly lose its momentum once it has passed the user's hands and the water droplets will fall to the lower end of the cavity 30 under the forces of gravity whilst the air exits the cavity 30 either through the cavity entrance 32 or via the open sides of the cavity 30.
  • the water is collected by the drain 38 and passed to a reservoir (not shown) where it is collected for disposal.
  • the reservoir can be emptied manually if desired.
  • the hand dryer 10 can incorporate some form of water dispersal system including, for example, a heater for evaporating the collected water into the atmosphere. The means by which the collected water is dispersed does not form part of the present invention.
  • the second embodiment of the invention is identical to the embodiment described above in all respects save that of the width of the slot-like opening 62 located at the end of the rear duct 52. Whereas the width W2 of the slot-like opening 62 is constant in the first embodiment, it is not constant in the second embodiment.
  • a front view of the slot-like opening (shown schematically for clarity) is shown in Figure 7 .
  • the lower edge 62a of the slot-like opening 62 is straight, as it is in the first embodiment.
  • the upper edge 62b of the slot-like opening 62 is curved in the central area 1 thereof so that the width of the slot-like opening 62 increases from a minimum width w to a maximum width W.
  • the minimum width w of the slot-like opening 62 is constant and the preferred value of the minimum width w is 0.4mm.
  • the preferred value of the maximum width W is less than twice the value of the minimum width w, in this case 0.7mm.
  • the central area 1 covers substantially one half of the entire length L of the slot-like opening 62.
  • the distance between the upper edge 62b and the lower edge 62a begins to increase at a point approximately one quarter of the way along the slot-like opening 62 from either end thereof.
  • the shape of the upper edge 62b is symmetrical and takes the form of a smooth curve having its highest point in the centre of the slot-like opening.
  • the hand dryer according to the second embodiment is capable of emitting an increased mass of air through the centre of the rear slot-like opening 62 in comparison to the first embodiment. This is advantageous because the area of the hands which is often most difficult to dry using this type of hand dryer is that around the thumbs and forefingers. The emission of an increased mass of air in that region of the hands improves the ability of the dryer to dry the hands evenly.
  • the width of the rear slot-like opening 62 can be varied by altering the shape of either or both edges and that the precise shape of the slot is not limited to that shown in Figure 7 .
  • the slot-like openings 60, 62 can be arranged so that the sheets of air which are emitted therefrom are directed generally along planes which are substantially parallel to one another. This minimises the amount of turbulent flow present inside the cavity 30 whilst the drying apparatus is in use.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Claims (17)

  1. Appareil sèche-mains, comportant un boîtier (12), une cavité (30) formée dans le boîtier (12) pour recevoir un objet, un ventilateur (40) agencé dans le boîtier (12) et capable de produire un écoulement d'air, deux ouvertures en forme de fente opposées (60, 62), communiquant avec le ventilateur et agencées dans des côtés opposés du boîtier (12), de sorte à diriger un écoulement d'air de manière transversale à travers la cavité (30), caractérisé en ce que les deux ouvertures en forme de fente ont des largeurs différentes, la largeur maximale n'étant pas supérieure à 1,0 mm.
  2. Appareil sèche-mains selon la revendication 1, dans lequel chaque ouverture en forme de fente (60, 62) a une largeur respective, la largeur de l'ouverture en forme de fente la plus étroite (60) correspondant à au moins 0,3 mm.
  3. Appareil sèche-mains selon la revendication 2, dans lequel la largeur de l'ouverture en forme de fente la plus large (62) n'est pas supérieure à 0,7 mm.
  4. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 80 m/s.
  5. Appareil sèche-mains selon la revendication 4, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 100 m/s.
  6. Appareil sèche-mains selon la revendication 5, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 150 m/s.
  7. Appareil sèche-mains selon la revendication 6, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à environ 180 m/s.
  8. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel la pression de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 15 kPa.
  9. Appareil sèche-mains selon la revendication 8, dans lequel la pression de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 22 kPa.
  10. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel une des deux ouvertures en forme de fente a une largeur constante le long de sa longueur.
  11. Appareil sèche-mains selon l'une quelconque des revendications 1 à 9, dans lequel une des deux ouvertures en forme de fente a une largeur qui varie le long de sa longueur.
  12. Appareil sèche-mains selon la revendication 11, dans lequel une des deux ouvertures en forme de fente a une largeur qui est maximale au niveau de son centre.
  13. Appareil sèche-mains selon les revendications 11 ou 12, dans lequel la largeur maximale de ladite une ouverture des deux ouvertures en forme de fente représente moins du double de sa largeur minimale.
  14. Appareil sèche-mains selon la revendication 13, dans lequel pratiquement la moitié de la longueur de ladite une ouverture des deux ouvertures en forme de fente a une largeur supérieure à la largeur minimale.
  15. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel une première ouverture (60) desdites deux ouvertes en forme de fente se trouve dans une paroi avant (14) de la cavité, une deuxième ouverture (62) desdites deux ouvertures en forme de fente (60, 62) se trouvant dans une paroi arrière (16) de la cavité (30), la largeur de la première ouverture (60) des deux ouvertures en forme de fente étant inférieure à la largeur d'une deuxième ouverture (62) des deux ouvertures en forme de fente (60, 62).
  16. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel les ouvertures en forme de fente opposées (60, 62) sont agencées de sorte qu'en service, les écoulements d'air émis à travers elles sont inclinés vers l'extrémité interne extrême de la cavité (30).
  17. Appareil sèche-mains selon l'une quelconque des revendications 1 à 15, dans lequel les ouvertures en forme de fente opposées sont agencées de sorte qu'en service, les écoulements d'air émis à travers elles sont pratiquement parallèles.
EP06744146A 2005-07-30 2006-06-07 Appareil de sechage Active EP1909625B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0515750.8A GB0515750D0 (en) 2005-07-30 2005-07-30 Drying apparatus
GB0600872A GB2428570A (en) 2005-07-30 2006-01-17 Drying apparatus having at least one slot-like opening
PCT/GB2006/002093 WO2007015040A1 (fr) 2005-07-30 2006-06-07 Appareil de sechage

Publications (2)

Publication Number Publication Date
EP1909625A1 EP1909625A1 (fr) 2008-04-16
EP1909625B1 true EP1909625B1 (fr) 2009-08-05

Family

ID=36609565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06744146A Active EP1909625B1 (fr) 2005-07-30 2006-06-07 Appareil de sechage

Country Status (5)

Country Link
EP (1) EP1909625B1 (fr)
KR (1) KR100981403B1 (fr)
AU (1) AU2006274709C1 (fr)
CA (1) CA2617116C (fr)
WO (1) WO2007015040A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4104728A1 (fr) * 2021-06-18 2022-12-21 B/E Aerospace, Inc. Sèche-mains pour toilettes

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2428569B (en) * 2005-07-30 2009-04-29 Dyson Technology Ltd Dryer
GB0515749D0 (en) * 2005-07-30 2005-09-07 Dyson Technology Ltd Drying apparatus
GB0515744D0 (en) 2005-07-30 2005-09-07 Dyson Technology Ltd Dryer
GB0515750D0 (en) * 2005-07-30 2005-09-07 Dyson Technology Ltd Drying apparatus
US8813383B2 (en) * 2012-03-06 2014-08-26 Hokwang Industries Co., Ltd. Watermark-free hand dryer
DE102012008253A1 (de) 2012-04-25 2013-10-31 Ushio Europe B.V. Trockner, insbesondere Handtrockner
DE102017009637B4 (de) 2017-10-17 2020-11-26 Blv Licht- Und Vakuumtechnik Gmbh Handtrockner mit UV-Desinfektionsvorrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249026A (en) * 1990-10-16 1992-04-29 William Leonard Ratty Drier
JP3148435B2 (ja) * 1993-01-20 2001-03-19 三菱電機株式会社 手乾燥装置
JP2720722B2 (ja) * 1992-08-25 1998-03-04 三菱電機株式会社 手乾燥装置
JP2000316747A (ja) 1999-05-10 2000-11-21 Mitsubishi Electric Corp 乾燥装置
JP3994642B2 (ja) 2000-07-31 2007-10-24 松下電器産業株式会社 手乾燥装置
JP4055370B2 (ja) 2001-04-17 2008-03-05 三菱電機株式会社 手乾燥装置及び空気清浄器
JP2005177415A (ja) 2003-12-18 2005-07-07 Yasutaka Shiraishi オゾンによる殺菌、消毒作用を設けたハンドドライヤー

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4104728A1 (fr) * 2021-06-18 2022-12-21 B/E Aerospace, Inc. Sèche-mains pour toilettes

Also Published As

Publication number Publication date
KR100981403B1 (ko) 2010-09-10
KR20080022230A (ko) 2008-03-10
AU2006274709B2 (en) 2010-08-19
CA2617116C (fr) 2013-02-26
AU2006274709A1 (en) 2007-02-08
AU2006274709C1 (en) 2010-12-23
WO2007015040A1 (fr) 2007-02-08
CA2617116A1 (fr) 2007-02-08
EP1909625A1 (fr) 2008-04-16

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