EP0437155A1 - Verfahren zur Ultraschallzerstäubung einer Flüssigkeitslösung und Tröpfchendiffusor zur Durchführung dieses Verfahrens - Google Patents

Verfahren zur Ultraschallzerstäubung einer Flüssigkeitslösung und Tröpfchendiffusor zur Durchführung dieses Verfahrens Download PDF

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Publication number
EP0437155A1
EP0437155A1 EP90440014A EP90440014A EP0437155A1 EP 0437155 A1 EP0437155 A1 EP 0437155A1 EP 90440014 A EP90440014 A EP 90440014A EP 90440014 A EP90440014 A EP 90440014A EP 0437155 A1 EP0437155 A1 EP 0437155A1
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EP
European Patent Office
Prior art keywords
micro
ultrasound
liquid solution
spraying
droplets
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.)
Granted
Application number
EP90440014A
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English (en)
French (fr)
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EP0437155B1 (de
Inventor
Thierry Letartre
Bernard Delannoy
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Laboratories Anios SA
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Laboratories Anios SA
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Publication date
Application filed by Laboratories Anios SA filed Critical Laboratories Anios SA
Publication of EP0437155A1 publication Critical patent/EP0437155A1/de
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Publication of EP0437155B1 publication Critical patent/EP0437155B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0615—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced at the free surface of the liquid or other fluent material in a container and subjected to the vibrations

Definitions

  • the invention relates to a method of micro-spraying a liquid solution by ultrasound as well as to a micro-droplet diffuser for vaporizing a liquid solution, intended for example in the medical environment for emission vapors of disinfectant products, for aseptic rooms, instruments or other.
  • liquid micro-droplets for example of a disinfectant product
  • the first usable apparatus comprises a propeller system, the propeller of which is surrounded by baffles and comprises a perforated hub, through which the solution to be sprayed is injected.
  • the hub has lateral orifices through which the liquid escapes in droplets. Due to the strong centrifugal force prevailing at this level, the droplets are ejected radially with a large live force.
  • a static grid on which the droplets are sprayed in a mist then entrained by the main ventilation.
  • the non-sprayed liquid part is collected in the bottom of the device where a pump re-injects the liquid into the propeller hub.
  • the second spray technique uses the sprinkler principle, in which the liquid to be sprayed is injected under pressure then, at the rear of the nozzle, a compressed air outlet nozzle is placed which allows the emitted droplets to be entrained.
  • a diffuser being to vaporize a liquid, it is important that, in the technique used, the spraying results in obtaining droplets of the smallest possible dimension. In fact, in this case, the ratio between the surface and the mass is optimum and the vaporization is easy since it suffices to supply the droplet with a very small amount of heat to result in its total vaporization.
  • micro-droplets which form this mist can be entrained by an air current in which the micro-droplets evaporate.
  • This principle of micro-spraying offers great advantages, particularly in terms of the powers involved and the dimensions of micro-droplet formed.
  • the main object of the present invention is to present a method of micro-spraying a liquid solution by ultrasound which offers the advantages of being able to deliver a high flow rate compatible with the capacities required for disinfecting the premises and with which there is has a mastery of the dimension of micro-droplets.
  • the diffuser of the present invention is perfectly compatible with medical applications for disinfecting premises where it proves to be very efficient, in particular in terms of yield.
  • the process of micro-spraying a liquid solution by ultrasound intended in particular to form a mist of disinfectant product, for sanitizing medical or other premises, according to which ultrasound is generated within 'a bath of liquid solution is characterized in that the ultrasonic waves are focused on the surface of the bath.
  • the micro-droplet diffuser for vaporizing a liquid solution intended in particular for the emission of disinfectant product vapors, authorizing the implementation of the method of the invention, which comprises a device for producing micro-droplets by ultrasound, placed in an air circulation vein to drive and diffuse the micro-droplets, is characterized by the fact that the device for producing the micro-droplets comprises means for concentrating the ultrasound, delivered by a transducer , on the surface of the liquid solution.
  • the present invention relates to a method of micro-spraying a liquid solution by ultrasound as well as a micro-droplet diffuser for the vaporization of a liquid solution allowing the implementation of said method. It will find its application in particular in the medical environment for the disinfection of premises by diffusion of a disinfectant product.
  • a suitable chemical is sprayed into the atmosphere of the room using a diffuser.
  • a diffuser two types are mainly used, which are characterized according to their principle of spraying the liquid solution, namely a fan or a nozzle, as mentioned above.
  • the bath 1 of liquid solution intended to be micro-sprayed as well as a source 2 of ultrasound.
  • the frequency used for ultrasound emissions is not imposed; however, the range is 0.5 megahertz to 5 megahertz is recommended.
  • the ultrasonic waves 3 are focused on the surface 4 of the bath 1. Under these conditions, it is now believed that micro-bubbles are created by cavitation which burst on the surface of the liquid and which will generate a significant production of micro-droplets and that it has a reduced size, less than 0.3 microns.
  • the fountain 5 forms a jet of cylindrical liquid which flows regularly. In general, for a given power, the regularity of flow of the fountain 5 is optimum.
  • the micro-bubbles 7, created inside the fountain 5, explode on the surface and form the aerosol 6. Thanks to the focusing in a zone 4 of the surface of the liquid , the acoustic waves propagate in the jet of the fountain 5 under strong power from where the creation of numerous micro-bubbles 7.
  • the inclined fountain of the invention has an upper surface for a given energy and flow rate.
  • the power of ultrasound generally ranges from about 1 to 3 watts.
  • the fountain has an ideal shape that must be sought.
  • FIG. 2 shows the use of a source 2 whose profile concentrates the radiated waves 3 towards a point 4 of the liquid surface.
  • a transducer 2 the surface of which has been hollowed out according to a concave profile in order to direct the waves towards a focal point, gives certain results but not fully satisfactory.
  • FIG. 4 represents a diffuser 9 of micro-droplets for the vaporization of a liquid solution 10 authorizing an implementation of the method described above.
  • the diffuser 9 comprises a device 11 for producing microdroplets by ultrasound, placed in a vein 12 of air circulation, to entrain and diffuse into the atmosphere the microdroplets produced.
  • the air circulation in the stream 12 is ensured by means of a motorized propeller 13.
  • the device 11 for producing micro-droplets firstly comprises a source 14 of ultrasound immersed in the bath 10 of solution to be vaporized and means 15 for concentrating the ultrasounds 16 on the surface 17 of the liquid solution 10.
  • the means for focusing the ultrasonic radiation are in the form of a reflection surface 18 of ultrasound with a geometric profile suitable for concentrating the radiation at a point 17 of the liquid level 10.
  • the reflecting surface 18 is formed directly by the wall of the container containing the liquid solution to be vaporized.
  • This container has at its upper part an opening through which the micro-droplets of mist are entrained by the circulation of air set in motion by the fan 13.
  • Figure 5 shows in detail the realization of the source of ultrasound 14. This is only an exemplary embodiment and other implementations could of course be adopted.
  • the transducer used is a pellet 19 of piezoelectric material such as aged ceramic.
  • the front face of the patch 19 rests on a metal cup 20, for example made of stainless steel which has an electrical connection terminal.
  • the tablet 19 and the cup 20 are placed in a housing 22 preferably made of an elastic or rubberized material.
  • a second cup 23 rests on the back of the pad 19 by means of lugs 24 which provide the electrical contact.
  • the cup 23 also includes an electrical connection lug 25. The welds must be avoided and the pellet is cooled on the liquid side.
  • the resonance frequency of the ultrasound source is adjusted.
  • the diameter of the pellet should preferably remain of reduced size, in particular of around twenty millimeters for a frequency of two megahertz, this to limit the appearance of lobes of secondary radiation.
  • FIG. 6 represents the desired radiation diagram for a source of ultrasound in the context of the present invention.
  • the transducer pad comprises two metallized surfaces 26 and 27 respectively of different surfaces. With such an asymmetry, the radiation lobe 28 is unique, the traditional secondary lobes are completely eliminated. The use of an apodized tablet 19 is recommended.
  • the spraying of approximately two liters per hour of liquid solution is envisaged using a fan of approximately one thousand cubic meters per hour of flow and several independent sources of ultrasound and essentially of different frequencies.

Landscapes

  • Special Spraying Apparatus (AREA)
  • Cosmetics (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP90440014A 1989-12-01 1990-02-20 Verfahren zur Ultraschallzerstäubung einer Flüssigkeitslösung und Tröpfchendiffusor zur Durchführung dieses Verfahrens Expired - Lifetime EP0437155B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916424 1989-12-01
FR8916424A FR2655279B1 (fr) 1989-12-01 1989-12-01 Procede de micro-pulverisation d'une solution par ultra son et diffuseur de micro-gouttelettes mettant en óoeuvre le dit dispositif.

Publications (2)

Publication Number Publication Date
EP0437155A1 true EP0437155A1 (de) 1991-07-17
EP0437155B1 EP0437155B1 (de) 1995-02-15

Family

ID=9388423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90440014A Expired - Lifetime EP0437155B1 (de) 1989-12-01 1990-02-20 Verfahren zur Ultraschallzerstäubung einer Flüssigkeitslösung und Tröpfchendiffusor zur Durchführung dieses Verfahrens

Country Status (5)

Country Link
EP (1) EP0437155B1 (de)
AT (1) ATE118378T1 (de)
DE (1) DE69016990D1 (de)
ES (1) ES2071070T3 (de)
FR (1) FR2655279B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690510A1 (fr) * 1992-04-28 1993-10-29 Techsonic Sarl Procédé de refroidissement d'un gaz par vaporisation d'un liquide par ultrasons et appareils de refroidissement mettant en Óoeuvre le dit dispositif.
FR2716415A1 (fr) * 1994-02-22 1995-08-25 Renault Dispositif distributeur d'air dans un habitacle de véhicule automobile.
EP2016955A1 (de) * 2007-07-16 2009-01-21 Sanivap Oberflächendesinfektionsvorrichtung und -verfahren
CN112978846A (zh) * 2019-12-16 2021-06-18 中国科学院过程工程研究所 工业废水微小液滴光反应装置及方法
US11224767B2 (en) 2013-11-26 2022-01-18 Sanuwave Health, Inc. Systems and methods for producing and delivering ultrasonic therapies for wound treatment and healing
FR3112958A1 (fr) 2020-07-31 2022-02-04 Areco Finances Et Technologie - Arfitec Procédé et installation aéraulique pour la désinfection d’un local
EP2614105B2 (de) † 2010-09-10 2022-05-18 Basf Se Verfahren zur herstellung von verarbeitungsstabilem polyamid

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690634B1 (fr) * 1992-04-29 1994-10-14 Chronotec Dispositif de micro-pulvérisation générée par ondes ultra-sonores.
FR2721839B1 (fr) * 1994-07-04 1996-10-25 Imra Europe Sa Dispositif de pulverisation, notamment d'eau sous forme de micro-goutelettes, apte a fonctionner dans un milieu non stationnaire
RU2152829C2 (ru) * 1996-03-13 2000-07-20 Тоо "Ракурс" Устройство для ультразвукового распыления жидких сред
US6964647B1 (en) 2000-10-06 2005-11-15 Ellaz Babaev Nozzle for ultrasound wound treatment
US6601581B1 (en) 2000-11-01 2003-08-05 Advanced Medical Applications, Inc. Method and device for ultrasound drug delivery
US6533803B2 (en) 2000-12-22 2003-03-18 Advanced Medical Applications, Inc. Wound treatment method and device with combination of ultrasound and laser energy
US6761729B2 (en) 2000-12-22 2004-07-13 Advanced Medicalapplications, Inc. Wound treatment method and device with combination of ultrasound and laser energy
US8235919B2 (en) 2001-01-12 2012-08-07 Celleration, Inc. Ultrasonic method and device for wound treatment
US7914470B2 (en) 2001-01-12 2011-03-29 Celleration, Inc. Ultrasonic method and device for wound treatment
US6960173B2 (en) 2001-01-30 2005-11-01 Eilaz Babaev Ultrasound wound treatment method and device using standing waves
US6623444B2 (en) 2001-03-21 2003-09-23 Advanced Medical Applications, Inc. Ultrasonic catheter drug delivery method and device
US6478754B1 (en) 2001-04-23 2002-11-12 Advanced Medical Applications, Inc. Ultrasonic method and device for wound treatment
RU2234381C2 (ru) * 2002-08-12 2004-08-20 Институт прикладной механики УрО РАН Распылитель жидкости
US7713218B2 (en) 2005-06-23 2010-05-11 Celleration, Inc. Removable applicator nozzle for ultrasound wound therapy device
US7785277B2 (en) 2005-06-23 2010-08-31 Celleration, Inc. Removable applicator nozzle for ultrasound wound therapy device
US8491521B2 (en) 2007-01-04 2013-07-23 Celleration, Inc. Removable multi-channel applicator nozzle
RU2337766C1 (ru) * 2007-05-28 2008-11-10 Институт прикладной механики УрО РАН Распылитель жидкости
US20120065339A1 (en) 2010-09-10 2012-03-15 Basf Se Process for producing polyamide that is stable during processing
RU2577582C1 (ru) * 2014-10-20 2016-03-20 Федеральное государственное бюджетное учреждение науки Институт механики Уральского отделения Российской академии наук Пластинчатый распылитель жидкости
FR3029431A1 (fr) * 2014-12-05 2016-06-10 Areco Finances Et Tech - Arfitec Dispositif de pulverisation compact
FR3053610B1 (fr) 2016-07-11 2020-12-18 Anios Lab Sarl Dispositif de nebulisation d'un produit liquide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH282670A (de) * 1949-05-02 1952-05-15 Siemens Ag Verfahren zum Zerstäuben von Stoffen.
GB1069048A (en) * 1964-02-10 1967-05-17 Devilbiss Co Method and apparatus for producing aerosols
FR2234046A1 (de) * 1973-06-20 1975-01-17 Stern Freres Sa

Family Cites Families (1)

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JPS56139166A (en) * 1980-03-31 1981-10-30 Osaka Gas Co Ltd Ultrasonic spraying apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH282670A (de) * 1949-05-02 1952-05-15 Siemens Ag Verfahren zum Zerstäuben von Stoffen.
GB1069048A (en) * 1964-02-10 1967-05-17 Devilbiss Co Method and apparatus for producing aerosols
FR2234046A1 (de) * 1973-06-20 1975-01-17 Stern Freres Sa

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 15 (C-89), 28 janvier 1982; & JP-A-56 139 166 (OSAKA GAS CO., LTD) 31-03-1980 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690510A1 (fr) * 1992-04-28 1993-10-29 Techsonic Sarl Procédé de refroidissement d'un gaz par vaporisation d'un liquide par ultrasons et appareils de refroidissement mettant en Óoeuvre le dit dispositif.
FR2716415A1 (fr) * 1994-02-22 1995-08-25 Renault Dispositif distributeur d'air dans un habitacle de véhicule automobile.
EP2016955A1 (de) * 2007-07-16 2009-01-21 Sanivap Oberflächendesinfektionsvorrichtung und -verfahren
EP2614105B2 (de) † 2010-09-10 2022-05-18 Basf Se Verfahren zur herstellung von verarbeitungsstabilem polyamid
US11224767B2 (en) 2013-11-26 2022-01-18 Sanuwave Health, Inc. Systems and methods for producing and delivering ultrasonic therapies for wound treatment and healing
US11331520B2 (en) 2013-11-26 2022-05-17 Sanuwave Health, Inc. Systems and methods for producing and delivering ultrasonic therapies for wound treatment and healing
CN112978846A (zh) * 2019-12-16 2021-06-18 中国科学院过程工程研究所 工业废水微小液滴光反应装置及方法
CN112978846B (zh) * 2019-12-16 2023-11-03 中国科学院过程工程研究所 工业废水微小液滴光反应装置及方法
FR3112958A1 (fr) 2020-07-31 2022-02-04 Areco Finances Et Technologie - Arfitec Procédé et installation aéraulique pour la désinfection d’un local

Also Published As

Publication number Publication date
ES2071070T3 (es) 1995-06-16
EP0437155B1 (de) 1995-02-15
ATE118378T1 (de) 1995-03-15
FR2655279B1 (fr) 1993-09-17
FR2655279A1 (fr) 1991-06-07
DE69016990D1 (de) 1995-03-23

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