WO2022069869A1 - Sèche-mains autonettoyant - Google Patents

Sèche-mains autonettoyant Download PDF

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Publication number
WO2022069869A1
WO2022069869A1 PCT/GB2021/052438 GB2021052438W WO2022069869A1 WO 2022069869 A1 WO2022069869 A1 WO 2022069869A1 GB 2021052438 W GB2021052438 W GB 2021052438W WO 2022069869 A1 WO2022069869 A1 WO 2022069869A1
Authority
WO
WIPO (PCT)
Prior art keywords
hand dryer
light
controller
light source
hand
Prior art date
Application number
PCT/GB2021/052438
Other languages
English (en)
Inventor
Gemma MCLUCKIE
Dominic ZOLKIEWKA
Original Assignee
Dyson Technology Limited
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 Dyson Technology Limited filed Critical Dyson Technology Limited
Publication of WO2022069869A1 publication Critical patent/WO2022069869A1/fr

Links

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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/0005—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for pharmaceuticals, biologicals or living parts
    • A61L2/0011—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for pharmaceuticals, biologicals or living parts using physical methods
    • A61L2/0029—Radiation
    • A61L2/0052—Visible light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/084—Visible light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/15—Biocide distribution means, e.g. nozzles, pumps, manifolds, fans, baffles, sprayers

Definitions

  • the present invention relates to a hand dryer.
  • a hand dryer comprising at least one part that is susceptible to contamination when touched, and at least one light source for emitting light in a violet portion of the visual spectrum, the at least one light source being arranged in such a way as to illuminate the at least one part for the decontamination thereof, when emitting the light.
  • the violet portion of the visual spectrum is typically defined as spanning the range of about 380 to 450nm.
  • the light used may thus, e.g., have a wavelength of about 405nm. Light of these wavelengths is known to be very effective in killing any microbes that may have accumulated on the illuminated surfaces.
  • violet visible light for this particular implementation brings a number of advantages that are not found in UV or near UV light.
  • the low energy visible light does not damage the material of the surfaces it illuminates. This is especially advantageous when the hand dryer is at least partially made of plastics that are easily damaged by UV light.
  • the visibility of the light makes it clear to the user and other bystanders when the device is operating in a cleaning mode.
  • Another important advantage of the violet visible light is that no direct line of sight between the light source and the surface or part to be cleaned is needed. Indirect irradiation of the violet visible light helps to get rid of the microbial contamination too.
  • emitting light in a violet portion of the visual spectrum as part of a decontamination process means that the emitted light contains a significant portion of light in that part of the electromagnetic spectrum and that the intensity of that significant portion is sufficient to have a useful anti-microbial and decontaminating effect.
  • the emitted light does not need to be exclusively in the violet portion of the visual spectrum.
  • the intensity of the emitted light may vary over time. Such variations may be gradual and continuous or in the form of a pattern of light pulses. If pulsed light is used, the frequency, duration and intensity of the pulses may either be constant or varying.
  • the at least one part comprises a nozzle for blowing out a hand drying air stream.
  • these nozzles may receive microbial contamination coming from the user’s hands that may come very close to or even in direct contact with the nozzles. Conversely, microbial contamination located at or near the nozzles can easily be blown onto the next user’s hands.
  • the hand dryer is cleaned with a wet cloth, it is highly likely that at least the nozzles are wiped.
  • the hand dryer further comprises a controller, operatively coupled to and configured for timed control of the at least one light source.
  • the light source may be activated for a set amount of time, after each use of the hand dryer.
  • the light source may be activated whenever the room lighting is switched off and no one is in the room. The light source may then keep active for a set amount of time, or until the room lighting is switched on again.
  • the hand dryer may comprise a decontamination button, operatively coupled to the controller, the controller being configured to activate the at least one light source in response to activation of the decontamination button.
  • the hand dryer may further comprise at least one touch sensor for detecting a touch of the at least one part, the touch sensor being operatively coupled to the controller, the controller being configured to activate the at least one light source in response to detecting the touch of the at least one part.
  • touch sensors may, e.g., be mechanical sensors or electronic sensors, such as capacitive or resistive touch sensors.
  • the touch sensor is configured to detect a touch of a portion of the at least one part, the controller being configured to activate the at least one light source to selectively illuminate the touched portion. This will make it possible to only illuminate those portions of the at least one part that are actually touched and have the highest risk of being contaminated, thereby improving the energy efficiency of the cleaning operation.
  • the hand dryer may comprise a contamination detector, operatively coupled to the controller, for detecting contamination on a contaminated portion of the at least one part, the controller being configured to selectively illuminate the contaminated portion.
  • the contamination detector may use an optical sensor measuring the reflectance of light of a particular wavelength at a surface of the at least one part.
  • the light used for this reflection measurement may be the light from the at least one light source, but may also be provided by a separate light source, possibly emitting light at a different wavelength.
  • the hand dryer comprises a fan, operatively coupled to the controller, for generating a hand drying air stream. While the light source is emitting light for cleaning the at least one part, the controller may temporarily disable the fan to avoid the hand dryer being used and recontaminated before the cleaning process is completed. However, in other embodiments or modes of operation, the hand dryer may be used while the at least one light source emits its violet visible light.
  • Figure 1 shows an exemplary embodiment of a hand dryer according to the invention.
  • Figure 2 schematically shows a cross section of the hand dryer of Figure 1 .
  • Figure 3 shows a further exemplary embodiment of a hair dryer according to the invention.
  • FIGS 1 and 2 show an exemplary embodiment of a hand dryer 100 according to the invention.
  • the hand dryer 100 comprises an outer casing having a front wall 14, a rear wall 16, an upper face 18 and side walls 20.
  • the rear wall 16 can incorporate fixing devices for securing the hand dryer 100 to a wall or other structure prior to use.
  • An electrical connection may be provided on the rear wall or elsewhere on the casing.
  • a cavity 30 is formed in the upper part of the casing.
  • 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 100 by appropriate shaping of the side walls 20.
  • 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 motor 39 is located inside the casing and a fan 40, which is driven by the motor 39, is also located inside the casing.
  • the motor 39 is connected to the electrical connection and controlled by a controller 41.
  • the inlet 42 of the fan 40 communicates with an air inlet 44 formed in the casing.
  • 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.
  • the front air duct 50 is located primarily between the front wall 14 of the casing 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 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 or nozzles 60, 62 which are located in the front and rear walls 34, 36 respectively of the cavity 30.
  • the nozzles 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.
  • Proximity 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 proximity 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 proximity sensors 64 immediately below the inwardly projecting walls 54a, 54b, 56a, 56b of the ducts 50, 52 also reduces the risk of the proximity sensors 64 becoming dirty and inoperative.
  • proximity sensors 64 detect the presence of the user's hands and the controller 41 sends a signal to the motor 39 to drive the fan 40.
  • the high speed rotation of the fan 40 causes air to be drawn into the hand dryer 10 via the air inlet 44.
  • 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 hand dryer 100 further comprises a light source 71 , 72, preferably in the form of an array of LEDs (light emitting diodes), for emitting light in a violet portion of the visual spectrum.
  • a light source 71 , 72 preferably in the form of an array of LEDs (light emitting diodes), for emitting light in a violet portion of the visual spectrum.
  • an LED strip 71 is integrated in or attached to the rear wall 36 of the cavity 30.
  • the light strip 71 is coupled to the controller 41 , which controls the activation and deactivation of the light strip 71.
  • the light strip 71 may be activated for a set amount of time, after each use of the hand dryer 100, or after, e.g., every tenth time the hand dryer 100 is used.
  • the light strip 71 may be activated whenever the room lighting is switched off and no one is in the room.
  • the light strip 71 may then keep active for a set amount of time, or until the room lighting is switched on again. When turned on, this light strip 71 illuminates the cavity 30, the front and rear walls 34, 36 and the exposed portions of the proximity sensors 64 and the air nozzles 60, 62.
  • the violet portion of the visual spectrum is typically defined as spanning the range of about 380 to 450nm.
  • the light strip may thus use 405nm LEDs as are readily available for other applications.
  • One of the advantages of using light in the violet portion of the visual spectrum is that no direct line of sight between the light source and the surface or part to be cleaned is needed. Parts that are not directly illuminated by light from the light strip 71 , but only by light reflected at the surfaces of the front and rear walls 64, 66 of the cavity 30, are thus effectively cleaned too.
  • the surfaces of the front and rear walls 64, 66 are reflective for light at the wavelength of the light emitted by the light strip 71 for ensuring optimal cleaning performance.
  • a second violet light source 72 is provided inside the hand dryer casing for enabling decontamination of the filter 46.
  • air is drawn in through the air inlet 44 and filtered by the filter 46 to avoid dust and dirt getting into the motor 39 or the fan 40. Over time, the filtered dust and dirt may accumulate at the filter surface. Now and then, the filter 46 may be removed for a thorough cleaning or replaced by a new one. In the meantime, however, microbes may accumulate and multiply at the filter surface 46 too. By illuminating the filter 46 with violet light, such microbes can be effectively eliminated to avoid them getting sucked into the airstream and being expelled through the nozzles 60, 62.
  • the second light source 72 may, e.g., be operated continuously or at regular intervals and for a set amount of time. Alternatively, it may be turned on for a predetermined period every time the hand dryer 100 is used, or after, e.g., every tenth time the hand dryer is used.
  • Additional light sources may be provided for illuminating, e.g., a drip tray of the hand dryer 100 or the immediate surroundings of the hand dryer 100.
  • a drip tray of the hand dryer 100 When used, water droplets from the user’s hands may end up at the wall surface to which the hand dryer 100 is attached or on the floor surface below the hand dryer 100. When ensuring that such wall and floor surfaces are illuminated too, those surfaces can be cleared of bacterial and microbial contamination too.
  • the activation of the light sources 71 , 72 is controlled by the controller 41 and may occur at regular intervals and for predetermined amounts of time.
  • the activation of the light sources 71 , 72 is triggered by the use of the hand dryer 100 or by the presence (or absence) of people in the room.
  • Another option is to link activation of the light sources 71 , 72 to the occurrence of a more traditional manual cleaning of the hand dryer 100.
  • a cleaner may, after having manually cleaned the hand dryer 100 use a button 81 to turn on the light strip 71 and/or the second light source 72.
  • a button 81 is preferably located out of sight for normal users, using the hand dryer 100 to dry their hands, in order to avoid it being pressed by non-authorised people.
  • a key or RFID tag may be used for their activation.
  • the hand dryer 100 may further comprise at least one touch sensor 82 for detecting a touch of a frequently touched part, such as the nozzles 60, 62.
  • the touch sensor 82 is operatively coupled to the controller 41 for allowing, the controller 41 to activate the light strip 71 in response to detecting the touch of the nozzles 62, 60.
  • the nozzle 62 mounted that it is slightly movable in a forward and backward direction. In normal use, a spring or other biasing element biases the nozzle in a more forward position.
  • the nozzle When touched, e.g., by a hand during use of the hand dryer 100 or by a wet cloth during cleaning, the nozzle is pushed backward, which is registered by the touch sensor 82 and communicated to the controller 41 , which may then decide to start a cleaning program and turn on the light strip 71.
  • touch sensors such as electrical or optical touch sensors may also be used for this purpose.
  • the touch sensor 82 is configured to detect a touch of only a portion of the nozzle 60, 62 and the controller activates only a corresponding portion of the light strip 71 in order to selectively illuminate the touched portion of the nozzle 60, 62. This may, e.g., be useful after a short and involuntary touch of the nozzle 60, 62 by a user who is drying his or her hands and may reduce the amount of emitted light and energy used for decontaminating the nozzle 60, 62.
  • the hand dryer 100 may comprises a contamination detector, here in the form of a camera 84, operatively coupled to the controller 41 , for detecting contamination on a contaminated portion of the parts that may be contaminated. This will allow the controller to selectively illuminate only the contaminated portion.
  • a contamination detector here in the form of a camera 84
  • a simpler optical sensor may be used, for example an optical sensor measuring the reflectance of light of a particular wavelength.
  • the optical sensor may be integrated in the light strip 71 or in the proximity sensor 64, but can also be a separate unit. It may or may not use light of the same wavelength as emitted by the light strip 71.
  • the fan may be disabled during the cleaning process. Because the light strip 71 and the second light source 72 deal with different contamination sources and are provided for cleaning different parts, they may not always be used at the same time and for the same duration.
  • the hand dryer 100 may also be used while the at least one light strip 71 and/or the second light source 72 are active.
  • the light from the second light source 72 will typically not be visible from the outside unless, apertures or transparent materials are applied to the casing.
  • Such apertures and transparent materials may be strategically designed for, e.g. branding and aesthetic purposes, in addition to allowing the user to easily identify when the second light source 72 is active.
  • FIG. 3 shows a further exemplary embodiment of a hair dryer 100 according to the invention.
  • This hand dryer 100 has its air inlet 44 in a side panel 20. The nozzles are not visible in this view, but they provide an air stream in the direction of the block arrows.
  • An LED strip 71 is provided at the rear wall 16 of the hand dryer 100 to illuminate and decontaminate the nozzles.
  • hand dryers 100 of this type most of the water from the user’s hands is blown onto the wall to which the hand dryer 100 is attached or on the floor below the hand dryer 100. If the user has not thoroughly washed his hands before drying them or has touched other parts of his body or nearby surfaces after washing them, there is a risk of this wall or floor being contaminated by bacterial and microbial contamination.
  • the hand dryer 100 may comprise light sources that are arranged to illuminate the immediate surroundings of the hand dryer 100 too.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Molecular Biology (AREA)
  • Domestic Plumbing Installations (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

L'invention concerne un sèche-mains comprenant au moins une partie qui est susceptible de contamination lorsqu'elle est touchée, et au moins une source de lumière pour émettre de la lumière dans une partie violette du spectre visuel, la ou les sources lumineuses étant conçues de manière à éclairer ladite au moins une partie pour sa décontamination, lors de l'émission de lumière.
PCT/GB2021/052438 2020-09-30 2021-09-20 Sèche-mains autonettoyant WO2022069869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2015465.4A GB2599397A (en) 2020-09-30 2020-09-30 Self-cleaning hand dryer
GB2015465.4 2020-09-30

Publications (1)

Publication Number Publication Date
WO2022069869A1 true WO2022069869A1 (fr) 2022-04-07

Family

ID=73197202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2021/052438 WO2022069869A1 (fr) 2020-09-30 2021-09-20 Sèche-mains autonettoyant

Country Status (2)

Country Link
GB (1) GB2599397A (fr)
WO (1) WO2022069869A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005074776A1 (fr) * 2004-02-04 2005-08-18 In-Ja Lee Seche-mains a sterilisateur
JP2006274573A (ja) * 2005-03-28 2006-10-12 Inax Corp 光学式のセンサを有する設備
KR20110042990A (ko) * 2009-10-20 2011-04-27 웅진코웨이주식회사 손 건조기 및 손 건조기의 출구 트레이 살균 방법
KR101897245B1 (ko) * 2017-05-30 2018-09-11 한국철도공사 코핸드워시 드라이장치

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3750317B2 (ja) * 1997-10-24 2006-03-01 東陶機器株式会社 手乾燥装置
JP2005305031A (ja) * 2004-04-26 2005-11-04 Ishikawajima Harima Heavy Ind Co Ltd 手指殺菌装置
MY174142A (en) * 2011-04-07 2020-03-10 Excel Dryer Inc Sanitizing hand dryer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005074776A1 (fr) * 2004-02-04 2005-08-18 In-Ja Lee Seche-mains a sterilisateur
JP2006274573A (ja) * 2005-03-28 2006-10-12 Inax Corp 光学式のセンサを有する設備
KR20110042990A (ko) * 2009-10-20 2011-04-27 웅진코웨이주식회사 손 건조기 및 손 건조기의 출구 트레이 살균 방법
KR101897245B1 (ko) * 2017-05-30 2018-09-11 한국철도공사 코핸드워시 드라이장치

Also Published As

Publication number Publication date
GB202015465D0 (en) 2020-11-11
GB2599397A (en) 2022-04-06

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