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WO2001066158A1 - Distributeur de matiere volatile - Google Patents

Distributeur de matiere volatile Download PDF

Info

Publication number
WO2001066158A1
WO2001066158A1 PCT/GB2001/000903 GB0100903W WO0166158A1 WO 2001066158 A1 WO2001066158 A1 WO 2001066158A1 GB 0100903 W GB0100903 W GB 0100903W WO 0166158 A1 WO0166158 A1 WO 0166158A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
conduit
dispenser according
link
magnet
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.)
Ceased
Application number
PCT/GB2001/000903
Other languages
English (en)
Inventor
Brian Slade
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU35835/01A priority Critical patent/AU3583501A/en
Publication of WO2001066158A1 publication Critical patent/WO2001066158A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • A61L9/127—Apparatus, e.g. holders, therefor comprising a wick

Definitions

  • This invention relates to dispensers for volatile materials in liquid form, in particular for releasing such materials into a surrounding atmosphere in a controllable manner.
  • Dispensers which have a reservoir of the fluid to be dispensed held in an essentially closed vessel but having a wick for drawing the liquid out of the vessel by capillary action, the wick itself serving as a dispersing element or being connected to another element of larger surface area which will itself disperse the volatile liquid more readily into the atmosphere.
  • the dispersal of the liquid can only be controlled in a relatively limited manner, however, for example by providing a lid or cap that the user can close when no further material is to be released.
  • a dispenser comprising a liquid reservoir for supplying a volatile liquid to a dispersal element having a surface from which the liquid is dispersed to the surrounding atmosphere, a liquid conduit from the reservoir to the dispersal element comprising a link that is displaceable to interrupt the flow from the reservoir to the dispersal element, and electrical drive means for controlling said link to displace it between positions opening and closing a liquid path through said conduit from the reservoir to the dispersal element.
  • the electrical control means preferably comprises latch means for retaining the link in each of said two positions selectively, and powered drive means for switching the link between said positions. It can thus be arranged that an energy input will be required only for switching the link between its alternative positions while the latching means, which may comprise magnetic elements, can be arranged to hold the link in the position to which it has been switched.
  • the link comprises a permanent magnet to which a portion of said conduit is attached, the magnet lying between and movable towards and away from either of a pair of opposed magnetisable elements each provided with electromagnetic energising means, such as a conductive coil, the magnet having opposite poles directed towards the respective elements and the energising means being arranged to magnetise said elements to move the permanent magnet towards one of the elements selectively, in order to open and close said liquid path.
  • electromagnetic energising means such as a conductive coil
  • the energising means may be arranged to magnetise the ends of the elements nearer the magnet with the same polarity, so urging the magnet towards one element but away from the other, but being operable to reverse said poles of the elements, whereby the magnet can be moved towards one or other of the elements selectively.
  • the link may comprise a flexible portion of the conduit that is displaceable to connect with or be disconnected from a contiguous portion of the conduit to close or open the liquid path.
  • Preferably at least the liquid supply side of said connection is formed by a member through which the liquid flows by capillary action.
  • the flow onto the dispersal element relies on a syphon effect, the element itself taking the form of a generally laminar surface extending downwardly from said conduit which comprises capillary means for drawing the liquid from a lower level to the top of the laminar element.
  • the link is placed at or adjacent the top of the syphon path, in particular so as to ensure that liquid does not continue to feed through by gravity from the supply side when the link is opened.
  • the rate of supply of the liquid to the screen should be related to the rate at which the liquid disperses from the screen. If it becomes overloaded with liquid, the lower region of the screen can become flooded and the rate of dispersal may then be reduced.
  • the rate at which these components are dispersed can become skewed, when the retention of less volatile components impedes the replenishment of the more volatile components escaping from the screen.
  • control of the displaceable link to interrupt the supply to the screen can be arranged to minimise the occurrence of flooding.
  • a timer may be used to control the displacement of the link to interrupt the supply to the screen at regular intervals.
  • control in particular the duration of the periods in which the liquid path through said conduit from the reservoir to the dispersal element is open, to have some dependence on the ambient temperature in which the device is operating. This is because the rate at which the volatile liquid disperses from the screen will itself be dependent on this ambient temperature. If the temperature is low, the liquid will disperse less quickly, and the screen will be more prone to flooding in the lower region. By reducing the rate of supply of the liquid to the screen in low ambient temperature conditions, the risk of flooding can be minimised.
  • the dispenser has a liquid reservoir 3 from the bottom of which an outlet tube 8 extends to a top outlet above the liquid level in the reservoir the outlet terminating with a capillary pad 9.
  • a laminar dispersal screen 2 Beside the reservoir is a laminar dispersal screen 2 which depends from a hollow supply bar 6 at the same level as the top outlet. Between the top outlet and the supply bar 6 is a link 7, shown spaced from the top outlet but displaceable to bring a capillary contact pad 10 on its entry end into abutment with the pad 9 at the top outlet.
  • the outlet tube 8 is filled with a wick which extends to the outlet capillary pad (which may be integral with the wick) .
  • the U-shaped link 7 is made of a flexible capillary material, like its contact pad 9, and the supply bar similarly contains a wick.
  • the supply bar wick is in contact with the top of the screen 2 so that liquid can form by gravity from the wick down the screen 2.
  • the outlet tube wick, the link and the supply bar wick thus form a conduit providing a capillary path drawing liquid from the reservoir 3 to the screen 2, the rate of flow along that path being dependent on the syphon action created as the liquid flows down the screen 2.
  • the link 7 is suspended by an arm 13 from a fixed top pivot 15. In the open position of the link 7 shown, the arm 13 abuts against a fixed stop 16.
  • the arm carries a permanent bar magnet 14, the opposite poles of which are directed towards respective soft iron cores
  • Each core 11,12 is located within an electrical coil A, B, the two coils being connected in series to be energizable jointly.
  • the coils A, B are so wound that the ends of both cores 11,12 facing the magnet 14 are given the same polarity when the coils A, B are energized.
  • the N and S poles of the magnet 14 will be between two poles of the cores 11,12 that are either both N or both S.
  • the illustrated example shows the S pole of the magnet 14 attracted to its adjacent core 12 and so holding the link 7 open until a further current pulse through the coils A, B to change polarity gives the ends of the cores 11,12 facing the magnet S poles.
  • the magnet 14 then pulls the arm 13 leftwards until the pads 9,10 come into contact and the pads 9,10 are held firmly in contact by the force of the magnet 14 until a further reversing current pulse.
  • the magnet 14 In both positions, the magnet 14 is held spaced from the cores, whether by the stop 16 or the pads 9,10.
  • the total amount of movement required may be no more than 1-2 mm as any clear gap between the pads 9,10 is sufficient to interrupt the flow through the conduit.
  • the cut-off of the liquid flow through the conduit is essentially instantaneous because the link 7 is located at the highest point of the liquid path so that there is no hydrostatic head acting that could force a bleed of fluid from the outlet pad 9 when the contact is opened.
  • the circuit in which the coils A,B operate is not shown but it can be capable of a variety of control modes. For example, it can produce intermittent operation with variable on and off periods to vary the amount of liquid released over a period of time. It can be clock-controlled, or have a light-sensitive element so that the liquid flow is stopped during darkness. Particularly when the device is to be used with liquids of high volatility, whose rate of dispersal from the screen is highly dependent on the ambient temperature in which the device is working, the control circuit preferably includes a temperature-sensitive element, whereby the durations of the on and off periods can be made temperature dependent. Specifically, in colder environments the liquid will disperse less rapidly and the tendency will be for more liquid to collect towards the bottom of the screen, eventually resulting in flooding.
  • the duration of the off periods can be increased and/or the duration of the on periods can be decreased. Conversely, where the device is operating in a relatively high temperature shorter off and/or longer on periods may be appropriate. However, other factors may then dominate the control of the liquid supply rate, for instance the desire not to overload the surrounding atmosphere with the dispersed liquid, which may for example be a fragrance.
  • the dispenser according to the invention is particularly suitable for use with ventilation apparatus that incorporates time controls or the like which typically rely on electronic controllers. It is common to use proprietary multi-channel controllers which may have spare channels, in which case the control of the release of a volatile liquid using electrical drive means according to the invention can be achieved in a particularly cost-effective manner.
  • the screen 2 may be made of a variety of materials but particularly preferred is an open weft-warp fabric of polymer fibres, eg. polyester, of which at least the downwardly extending threads comprise capillary passages.
  • the use of an open weave assists the circulation of air around the threads, assisting the release of the volatile material.
  • the open weave also means that the fabric has a relatively low bulk for a given area, so that the amount of liquid on the screen 2 at any instant is limited and its release can be better controlled.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

La présente invention concerne un distributeur comprenant un réservoir de liquide (3), qui permet de fournir un liquide volatil à un élément de dispersion (2) présentant une surface à partir de laquelle le liquide est dispersé dans l'atmosphère environnante. Une conduite de liquide (8) s'étend du réservoir (3) à l'élément de dispersion (2) et comprend une liaison (7) qui peut être déplacée, afin d'interrompre le flux allant du réservoir (3) à l'élément de dispersion (2). Des systèmes de commande électriques permettent de commander ladite liaison (7), afin de la déplacer entre des positions d'ouverture et de fermeture d'une trajectoire de liquide qui traverse la conduite, du réservoir (3) à l'élément de dispersion (2).
PCT/GB2001/000903 2000-03-06 2001-03-01 Distributeur de matiere volatile Ceased WO2001066158A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35835/01A AU3583501A (en) 2000-03-06 2001-03-01 Volatile material dispenser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00301799 2000-03-06
EP00301799.3 2000-03-06

Publications (1)

Publication Number Publication Date
WO2001066158A1 true WO2001066158A1 (fr) 2001-09-13

Family

ID=8172767

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/000903 Ceased WO2001066158A1 (fr) 2000-03-06 2001-03-01 Distributeur de matiere volatile

Country Status (2)

Country Link
AU (1) AU3583501A (fr)
WO (1) WO2001066158A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036062A3 (fr) * 2005-09-29 2007-05-18 Givaudan Sa Diffuseur de liquide volatile
US7452503B2 (en) * 2003-01-29 2008-11-18 Susan Hart, legal representative Kinetic air dispenser
ES2574445A1 (es) * 2014-12-17 2016-06-17 Zobele España, S.A. Dispositivo de liberación de sustancias volátiles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739928A (en) * 1985-10-15 1988-04-26 The Drackett Company Air freshener dispenser
AT392941B (de) * 1989-01-19 1991-07-10 Hamburger Dietrich Spendevorrichtung zur dosierten abgabe eines duftstoffes an die luft, insbesondere fuer einen fahrzeuginnenraum
WO1996027286A1 (fr) * 1995-03-04 1996-09-12 Reckitt & Colman Products Limited Appareil chimique
US5857620A (en) * 1997-07-14 1999-01-12 The Scott Fetzer Company Liquid dispenser with integral wick/emanator assembly
WO1999055392A1 (fr) * 1998-04-29 1999-11-04 Chown Peter A C Distributeur de produit chimique mis en oeuvre magnetiquement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739928A (en) * 1985-10-15 1988-04-26 The Drackett Company Air freshener dispenser
AT392941B (de) * 1989-01-19 1991-07-10 Hamburger Dietrich Spendevorrichtung zur dosierten abgabe eines duftstoffes an die luft, insbesondere fuer einen fahrzeuginnenraum
WO1996027286A1 (fr) * 1995-03-04 1996-09-12 Reckitt & Colman Products Limited Appareil chimique
US5857620A (en) * 1997-07-14 1999-01-12 The Scott Fetzer Company Liquid dispenser with integral wick/emanator assembly
WO1999055392A1 (fr) * 1998-04-29 1999-11-04 Chown Peter A C Distributeur de produit chimique mis en oeuvre magnetiquement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7452503B2 (en) * 2003-01-29 2008-11-18 Susan Hart, legal representative Kinetic air dispenser
WO2007036062A3 (fr) * 2005-09-29 2007-05-18 Givaudan Sa Diffuseur de liquide volatile
ES2574445A1 (es) * 2014-12-17 2016-06-17 Zobele España, S.A. Dispositivo de liberación de sustancias volátiles
WO2016097437A1 (fr) * 2014-12-17 2016-06-23 Zobele España, S.A. Dispositif de libération de substances volatiles
US10426859B2 (en) 2014-12-17 2019-10-01 ZOBELE ESPA{grave over (N)}A, S.A. Device for releasing volatile substances

Also Published As

Publication number Publication date
AU3583501A (en) 2001-09-17

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