EP1166704B1 - Hand-driers - Google Patents
Hand-driers Download PDFInfo
- Publication number
- EP1166704B1 EP1166704B1 EP01305528A EP01305528A EP1166704B1 EP 1166704 B1 EP1166704 B1 EP 1166704B1 EP 01305528 A EP01305528 A EP 01305528A EP 01305528 A EP01305528 A EP 01305528A EP 1166704 B1 EP1166704 B1 EP 1166704B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- hands
- hand
- drier
- 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.)
- Expired - Lifetime
Links
Images
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
Definitions
- This invention relates to hand-driers of the kind in which means is provided for passing air over hands inserted through an external wall of the drier into a cavity defined therein, and one or more sources of radiant energy are located for warming the hands within the cavity.
- a hand-drier of the above-specified kind is known from JP-A-8168449 in which hands to be dried are inserted into a cavity in ducting of the drier, and air is blown by a fan through the ducting to pass from an exhaust opening over the hands while they are warmed by radiation from an infra-red source located in the exhaust opening. It is one of the objects of the present invention to provide a hand-drier of said above-specified kind that is of an improved form compared with that described in JP-A-8168449.
- a hand-drier of said above-specified kind characterised in that the one or more sources of radiant energy are located to radiate heat through a wall of the cavity to warm the hands inserted in the cavity, and that the air passed over the hands is drawn through the external wall into the cavity for entry into the drier from outside.
- the hand-drier of the invention has the advantage that the possibility of bacterial infection of the hands is significantly reduced.
- the air is drawn into the cavity to pass over the hands from outside the drier, rather than being blown over them by a fan via internal ducting. Accordingly, any bacteria lurking in the fan, ducting or other enclosed parts of the drier, are not conveyed to the warmed hands.
- a hand-drier in which air is drawn from the hand-drying zone into the drier is described in IT-A-1242778.
- the air is drawn back into the drier from a rotating cushion of air that is created in the hand-drying zone by hot air injected into that zone from ducting within the drier.
- the possibility which is significantly reduced with the present invention, of the hands being infected while being dried is therefore in this case also, the possibility which is significantly reduced with the present invention, of the hands being infected while being dried.
- the radiant energy of the hand-drier of the invention may be infra-red radiation, and the air may be drawn into the cavity through the same opening in the external wall as used for insertion of the hands into the cavity.
- the cavity may be defined by a glass or other tube having an opening at one end for receiving the hands to be dried, and a fan or other means for drawing air into the cavity may in these circumstances be located at the other end of the tube for drawing air into the tube through the opening.
- the one or more sources of radiant energy may comprise a plurality of lamps that are located around the outside of the tube for applying heat to the hands by radiation through the wall of the tube.
- one or more baffles may be located around the outside of the tube for blocking radiation from the lamps passing out through the opening at said one end.
- the hand-drier has an external metal-housing that is formed by a front fascia 1 and a rear main-casing 2.
- the fascia 1 provides an open mouth 3 for easy entry of the hands to be dried into a glass tube 4 of the drier.
- the tube 4 is mounted coaxially within rings 5 that are retained within the casing 2 spaced from one another on six rods 6.
- the rods 6 are secured to a base-plate 7 and extend through it to project rearwardly from the casing 2 for use in attaching the drier to a structural wall (for example, a washroom-wall).
- An electrically-powered centrifugal fan 8 mounted on the plate 7 is coupled to the inner end 9 of the tube 4 for drawing air through the mouth 3 into the tube 4 at its outer end 10.
- the mouth 3 is of venturi shape, not only to facilitate insertion of the hands into the tube 4, but more especially to promote stream-flow of air into and along the inside of the tube 4. After passing over the hands, the air drawn in is vented from the fan 8 radially through openings 11 at the rear of the casing 2.
- tungsten-halogen lamps 12 are mounted equidistant from one another around the outside of the glass tube 4.
- the lamps 12 are shrouded by individual elliptical reflectors 13 (only some shown) that direct the emitted light radially inwards through the wall 14 of the tube 4.
- the tube 4 is of a borosilicate glass to resist thermal shock and to have good transparency to the infra-red radiations from the lamps 12, so that the hands inserted in the tube 4 are warmed.
- the rings 5 in combination form a louvre structure that blocks radiation from the lamps 12 exiting through the mouth 3, without limiting to any substantial extent the radiation path to the hands.
- a perforated disc 16 is mounted on the rods 6 across the inner end 9 of the tube 4 as a finger-guard to the fan 8.
- Insertion of hands through the mouth 3 into the tube 4 is detected by a passive infra-red sensor (not shown) for activating the fan 8 and energising the lamps 12 while the hands remain entered (other forms of motion and proximity sensing may be used).
- Radiation from the lamps 12 warms the wet hands to evaporate the water, and the air sucked over the hands by the fan 8 quickly draws off the water vapour and vents it into the ambient atmosphere from the drier via the openings 11; the drier may be modified to incorporate filtering of the air and/or condensation of the water from it, before venting.
- the efficient and comfortable warming of the hands is facilitated by the reflectors 13 in focusing the radiation through the wall 14 onto the hands with an even distribution around the whole circumference of the tube 4.
- the lamps 12 provide instant heat when energised, and cool rapidly afterwards. Moreover, they provide visible light which passes through the wall 14 to provide a 'comfort' effect within the tube 4 for the user while the hands are being dried.
- the drying process is efficiently and quickly achieved with the drier described above.
- heat energy is directed to the wet hands for evaporating the water on them, and is not used primarily for heating the air.
- the air surrounding the hands namely that into which evaporation takes place, is replaced continuously by fresh, unsaturated air from the ambient atmosphere so as to ensure that the evaporation process proceeds unhampered.
- the location of the hands within the partially-enclosed cavity formed by the tube 4 facilitates the rapid drawing off of water vapour without the necessity for movement of large volumes of air, and therefore enables a low-power, quiet fan to be used. Moreover, the possibility of bacterial infection of the hands during the drying process within the drier, is significantly reduced since the air contacting the hands is directly from the ambient atmosphere. It is notable in this respect that the air contacting the hands passes through the fan 8 and other enclosed parts of the drier where bacteria might lurk, only following such contact.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Drying Of Solid Materials (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Confectionery (AREA)
Abstract
Description
- This invention relates to hand-driers of the kind in which means is provided for passing air over hands inserted through an external wall of the drier into a cavity defined therein, and one or more sources of radiant energy are located for warming the hands within the cavity.
- A hand-drier of the above-specified kind is known from JP-A-8168449 in which hands to be dried are inserted into a cavity in ducting of the drier, and air is blown by a fan through the ducting to pass from an exhaust opening over the hands while they are warmed by radiation from an infra-red source located in the exhaust opening. It is one of the objects of the present invention to provide a hand-drier of said above-specified kind that is of an improved form compared with that described in JP-A-8168449.
- According to the present invention there is provided a hand-drier of said above-specified kind characterised in that the one or more sources of radiant energy are located to radiate heat through a wall of the cavity to warm the hands inserted in the cavity, and that the air passed over the hands is drawn through the external wall into the cavity for entry into the drier from outside.
- The hand-drier of the invention has the advantage that the possibility of bacterial infection of the hands is significantly reduced. In particular, the air is drawn into the cavity to pass over the hands from outside the drier, rather than being blown over them by a fan via internal ducting. Accordingly, any bacteria lurking in the fan, ducting or other enclosed parts of the drier, are not conveyed to the warmed hands.
- A hand-drier in which air is drawn from the hand-drying zone into the drier, is described in IT-A-1242778. In this case, however, the air is drawn back into the drier from a rotating cushion of air that is created in the hand-drying zone by hot air injected into that zone from ducting within the drier. There is therefore in this case also, the possibility which is significantly reduced with the present invention, of the hands being infected while being dried.
- The radiant energy of the hand-drier of the invention may be infra-red radiation, and the air may be drawn into the cavity through the same opening in the external wall as used for insertion of the hands into the cavity.
- The cavity may be defined by a glass or other tube having an opening at one end for receiving the hands to be dried, and a fan or other means for drawing air into the cavity may in these circumstances be located at the other end of the tube for drawing air into the tube through the opening. The one or more sources of radiant energy may comprise a plurality of lamps that are located around the outside of the tube for applying heat to the hands by radiation through the wall of the tube. In these circumstances, one or more baffles may be located around the outside of the tube for blocking radiation from the lamps passing out through the opening at said one end.
- A hand-drier in accordance with the present invention will now be described, by way of example, with reference to the accompanying drawing which shows the hand-drier in sectional-perspective view.
- Referring to the drawing, the hand-drier has an external metal-housing that is formed by a front fascia 1 and a rear main-
casing 2. The fascia 1 provides anopen mouth 3 for easy entry of the hands to be dried into aglass tube 4 of the drier. Thetube 4 is mounted coaxially withinrings 5 that are retained within thecasing 2 spaced from one another on sixrods 6. Therods 6 are secured to a base-plate 7 and extend through it to project rearwardly from thecasing 2 for use in attaching the drier to a structural wall (for example, a washroom-wall). - An electrically-powered
centrifugal fan 8 mounted on theplate 7 is coupled to the inner end 9 of thetube 4 for drawing air through themouth 3 into thetube 4 at itsouter end 10. Themouth 3 is of venturi shape, not only to facilitate insertion of the hands into thetube 4, but more especially to promote stream-flow of air into and along the inside of thetube 4. After passing over the hands, the air drawn in is vented from thefan 8 radially through openings 11 at the rear of thecasing 2. - Six tungsten-halogen lamps 12 (only some shown) are mounted equidistant from one another around the outside of the
glass tube 4. Thelamps 12 are shrouded by individual elliptical reflectors 13 (only some shown) that direct the emitted light radially inwards through thewall 14 of thetube 4. Thetube 4 is of a borosilicate glass to resist thermal shock and to have good transparency to the infra-red radiations from thelamps 12, so that the hands inserted in thetube 4 are warmed. Therings 5 in combination form a louvre structure that blocks radiation from thelamps 12 exiting through themouth 3, without limiting to any substantial extent the radiation path to the hands. As a further safety feature, aperforated disc 16 is mounted on therods 6 across the inner end 9 of thetube 4 as a finger-guard to thefan 8. - Insertion of hands through the
mouth 3 into thetube 4 is detected by a passive infra-red sensor (not shown) for activating thefan 8 and energising thelamps 12 while the hands remain entered (other forms of motion and proximity sensing may be used). Radiation from thelamps 12 warms the wet hands to evaporate the water, and the air sucked over the hands by thefan 8 quickly draws off the water vapour and vents it into the ambient atmosphere from the drier via the openings 11; the drier may be modified to incorporate filtering of the air and/or condensation of the water from it, before venting. The efficient and comfortable warming of the hands is facilitated by thereflectors 13 in focusing the radiation through thewall 14 onto the hands with an even distribution around the whole circumference of thetube 4. Thelamps 12 provide instant heat when energised, and cool rapidly afterwards. Moreover, they provide visible light which passes through thewall 14 to provide a 'comfort' effect within thetube 4 for the user while the hands are being dried. - The drying process is efficiently and quickly achieved with the drier described above. In particular, heat energy is directed to the wet hands for evaporating the water on them, and is not used primarily for heating the air. Furthermore, the air surrounding the hands, namely that into which evaporation takes place, is replaced continuously by fresh, unsaturated air from the ambient atmosphere so as to ensure that the evaporation process proceeds unhampered.
- The location of the hands within the partially-enclosed cavity formed by the
tube 4 facilitates the rapid drawing off of water vapour without the necessity for movement of large volumes of air, and therefore enables a low-power, quiet fan to be used. Moreover, the possibility of bacterial infection of the hands during the drying process within the drier, is significantly reduced since the air contacting the hands is directly from the ambient atmosphere. It is notable in this respect that the air contacting the hands passes through thefan 8 and other enclosed parts of the drier where bacteria might lurk, only following such contact.
Claims (10)
- A hand-drier wherein means (8) is provided for passing air over hands inserted through an external wall (1) of the drier into a cavity (4) defined therein, and wherein one or more sources (12) of radiant energy are located for warming the hands within the cavity (4), characterised in that the one or more sources (12) of radiant energy are located to radiate heat through a wall (14) of the cavity (4) to warm the hands inserted in the cavity (4), and that the air passed over the hands is drawn through the external wall (1) into the cavity (4) for entry into the drier from outside.
- A hand-drier according to Claim 1 wherein the one or more sources of radiant energy are one or more sources (12) of infra-red radiation.
- A hand-drier according to Claim 1 or Claim 2 wherein the air is drawn into the cavity (4) through the same opening (3) in the external wall (1) as used for insertion of the hands into the cavity (4).
- A hand-drier according to Claim 3 wherein the cavity is defined by a tube (4) having an opening (10) at one end for receiving the hands to be dried, and wherein the means (8) for drawing air through the cavity is located at the other end (9) of the tube (4) for drawing air into the tube (4) through the opening (10) at said one end.
- A hand-drier according to Claim 4 wherein the one or more sources of radiant energy comprise a plurality of lamps (12) that are located around the outside of the tube (4) for applying heat to the hands by radiation through the wall (14) of the tube (4).
- A hand-drier according to Claim 5 wherein the lamps are tungsten-halogen lamps (12).
- A hand-drier according to Claim 5 or Claim 6 wherein the lamps are shrouded by reflectors (13) to direct the emitted radiation radially inwards through the wall (14) of the tube (4) onto the hands.
- A hand-drier according to any one of Claims 4 to 7 wherein one or more baffles (5) are located around the outside of the tube (4) for blocking radiant energy from said sources (12) passing out through the opening (10) at said one end.
- A hand-drier according to any one of Claims 4 to 8 including means defining an open mouth (3) of venturi form leading into said opening (10) at said one end for promoting stream-flow of air into and along the tube (4).
- A hand-drier according to any one of Claims 4 to 9 including means for filtering and/or condensing water from the air drawn through the tube (4), before it is vented from the drier.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0015597 | 2000-06-27 | ||
GBGB0015597.8A GB0015597D0 (en) | 2000-06-27 | 2000-06-27 | Hand-driers |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1166704A1 EP1166704A1 (en) | 2002-01-02 |
EP1166704B1 true EP1166704B1 (en) | 2004-08-04 |
EP1166704B8 EP1166704B8 (en) | 2004-12-15 |
Family
ID=9894396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01305528A Expired - Lifetime EP1166704B8 (en) | 2000-06-27 | 2001-06-26 | Hand-driers |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1166704B8 (en) |
AT (1) | ATE272350T1 (en) |
DE (1) | DE60104604T2 (en) |
ES (1) | ES2225427T3 (en) |
GB (2) | GB0015597D0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8155508B2 (en) | 2006-01-12 | 2012-04-10 | Dyson Technology Limited | Drying apparatus |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2428569B (en) | 2005-07-30 | 2009-04-29 | Dyson Technology Ltd | Dryer |
GB0515750D0 (en) | 2005-07-30 | 2005-09-07 | Dyson Technology Ltd | Drying apparatus |
GB0515744D0 (en) * | 2005-07-30 | 2005-09-07 | Dyson Technology Ltd | Dryer |
GB0515749D0 (en) | 2005-07-30 | 2005-09-07 | Dyson Technology Ltd | Drying apparatus |
GB0515754D0 (en) | 2005-07-30 | 2005-09-07 | Dyson Technology Ltd | Drying apparatus |
GB2444028A (en) * | 2006-11-23 | 2008-05-28 | Stephen Ball | Personal drying apparatus with heater, fan and infra-red source |
DE202017001279U1 (en) * | 2017-03-10 | 2017-08-18 | Harun Özsoy | drying device |
CN112545347A (en) * | 2020-12-03 | 2021-03-26 | 中科院合肥技术创新工程院 | Prevent suction type's hand dryer of institute's sense |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB551794A (en) * | 1941-09-05 | 1943-03-10 | Alexander Duckham | Improvements in and relating to apparatus for drying the hands and/or face |
GB756554A (en) * | 1953-05-09 | 1956-09-05 | Broughton & Sons Engineers Ltd | A new or improved drying apparatus |
GB1240242A (en) * | 1969-03-06 | 1971-07-21 | David John Runchman | Automatic hand dryer |
US3643346A (en) * | 1969-05-29 | 1972-02-22 | Lestron International Corp | Drying apparatus |
US3766397A (en) * | 1972-04-12 | 1973-10-16 | T Rockson | Sterilizing hand dryer |
DE7526106U (en) * | 1975-08-18 | 1975-12-11 | Bosch Siemens Gmbh | ELECTRIC HAND DRYER |
GB1602115A (en) * | 1978-05-26 | 1981-11-04 | Aroa B A | Hot air driers |
IT1242776B (en) * | 1990-12-04 | 1994-05-17 | Bruno Bertolli | Electric hand-drier with rotating cushion of hot air jets combined with an infrared diffuser |
CA2104514C (en) * | 1992-08-25 | 1998-08-25 | Toshio Tatsutani | Hand dryer |
JPH08168449A (en) * | 1994-12-16 | 1996-07-02 | Yamazaki:Kk | Sterilizing and drying apparatus |
US6038786A (en) * | 1998-04-16 | 2000-03-21 | Excel Dryer Inc. | Hand dryer |
DE19905985C2 (en) * | 1999-02-12 | 2003-06-18 | Advanced Photonics Tech Ag | Device for drying people and / or body parts |
-
2000
- 2000-06-27 GB GBGB0015597.8A patent/GB0015597D0/en not_active Ceased
-
2001
- 2001-06-26 DE DE60104604T patent/DE60104604T2/en not_active Expired - Lifetime
- 2001-06-26 EP EP01305528A patent/EP1166704B8/en not_active Expired - Lifetime
- 2001-06-26 ES ES01305528T patent/ES2225427T3/en not_active Expired - Lifetime
- 2001-06-26 GB GB0115590A patent/GB2364242B/en not_active Expired - Lifetime
- 2001-06-26 AT AT01305528T patent/ATE272350T1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8155508B2 (en) | 2006-01-12 | 2012-04-10 | Dyson Technology Limited | Drying apparatus |
Also Published As
Publication number | Publication date |
---|---|
GB0015597D0 (en) | 2000-08-16 |
EP1166704A1 (en) | 2002-01-02 |
DE60104604T2 (en) | 2005-01-05 |
DE60104604D1 (en) | 2004-09-09 |
GB0115590D0 (en) | 2001-08-15 |
EP1166704B8 (en) | 2004-12-15 |
ATE272350T1 (en) | 2004-08-15 |
GB2364242A (en) | 2002-01-23 |
ES2225427T3 (en) | 2005-03-16 |
GB2364242B (en) | 2004-04-14 |
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