WO2021068042A1 - Atomiseur électrohydrodynamique - Google Patents

Atomiseur électrohydrodynamique Download PDF

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Publication number
WO2021068042A1
WO2021068042A1 PCT/AU2020/051095 AU2020051095W WO2021068042A1 WO 2021068042 A1 WO2021068042 A1 WO 2021068042A1 AU 2020051095 W AU2020051095 W AU 2020051095W WO 2021068042 A1 WO2021068042 A1 WO 2021068042A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
electrode
reference electrode
liquid
stream
Prior art date
Application number
PCT/AU2020/051095
Other languages
English (en)
Inventor
Van Thanh DAU
Dzung Viet DAO
Tuan-Khoa NGUYEN
Original Assignee
Griffith University
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 Griffith University filed Critical Griffith University
Publication of WO2021068042A1 publication Critical patent/WO2021068042A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/0255—Discharge apparatus, e.g. electrostatic spray guns spraying and depositing by electrostatic forces only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/002—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/002—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules
    • B05B5/003—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules by mixing two sprays of opposite polarity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/002—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules
    • B05B5/004—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules by alternating the polarity of the spray
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/007—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means the high voltage supplied to an electrostatic spraying apparatus during spraying operation being periodical or in time, e.g. sinusoidal
    • B05B5/008—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means the high voltage supplied to an electrostatic spraying apparatus during spraying operation being periodical or in time, e.g. sinusoidal with periodical change of polarity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/02—Details
    • H01J49/10—Ion sources; Ion guns
    • H01J49/16—Ion sources; Ion guns using surface ionisation, e.g. field-, thermionic- or photo-emission
    • H01J49/165—Electrospray ionisation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/02—Inhalators with activated or ionised fluids, e.g. electrohydrodynamic [EHD] or electrostatic devices; Ozone-inhalators with radioactive tagged particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/007—Processes for applying liquids or other fluent materials using an electrostatic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field

Definitions

  • the step of auto-tuning may comprise the step of increasing a frequency of the alternating current and determining that a stream of neutral particles is produced when a tuning current between a position at the reference electrode and a position at the nozzle electrode reaches a minimum.
  • Figure 3 is a schematic diagram illustrating use of the device of Figure 1 under a first set of operating conditions
  • Figure 5(a) illustrates the difference between AC and DC for this setup.
  • Figure 5(a) shows the charge of the particle flow measured by an electrometer probe placed 200 mm downstream from the capillary outlet. The charge is approximately 8000 fA for the DC case and is 40 times larger in magnitude than the result for the AC case at 100 Hz, which is in a range of 200 fA.
  • Figure 5(b) compares measurements of the particle size distributions of the setup of Figures 1, 3 and 4 with that generated by an aerosol spectrometer (“control”).
  • control an aerosol spectrometer
  • Figures 6(a) and 6(b) are photographs illustrating the stream of particles under various conditions: 6(a) depicts a DC case and 6(b) depicts an AC case where the applied frequency is 300 Hz.
  • Figure 6(c) is a photograph of the AC case showing the extent of the stream relative to a scale marking of 150 mm.
  • This embodiment differs from the embodiment of Figure 1 in that two pin electrodes 110 and 112 are provided on either side of the outlet 106. As illustrated the pin electrodes 110 and 112 are connected to the AC power supply 102 and therefore will have the same potential as the nozzle 104.
  • the device 100 further comprises two fans 112 and 114. Fan 112 is situated behind pin electrode 112 and fan 114 is situated behind electrode 110.
  • the pin electrodes 110 and 112 generate an electric field with the ring electrode 108. An ion cloud is formed by this electric field by attracting particles emitted by the nozzle outlet 106.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

Dispositif d'atomisation électrohydrodynamique comprenant une buse pour émettre un flux de liquide atomisé, la buse étant reliée à une source de liquide ; une électrode de buse associée à la buse ; une électrode de référence ; les électrodes de buse et de référence coopérant pour générer un champ électrique entre elles ; une source de courant électrique alternatif connectée à l'électrode de buse et à l'électrode de référence ; et la buse, l'électrode de buse, l'électrode de référence et la source de courant alternatif étant agencées de telle sorte qu'un liquide émis par la buse est atomisé en particules chargées positivement et négativement, les particules chargées positivement et négativement se combinant en aval de la buse pour former des particules liquides neutres. L'électrode de référence peut être située en amont d'un orifice de sortie de la buse. L'invention concerne également un procédé correspondant.
PCT/AU2020/051095 2019-10-11 2020-10-12 Atomiseur électrohydrodynamique WO2021068042A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LULU101432 2019-10-11
LU101432A LU101432B1 (en) 2019-10-11 2019-10-11 Electrohydrodynamic atomizer

Publications (1)

Publication Number Publication Date
WO2021068042A1 true WO2021068042A1 (fr) 2021-04-15

Family

ID=68281897

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2020/051095 WO2021068042A1 (fr) 2019-10-11 2020-10-12 Atomiseur électrohydrodynamique

Country Status (2)

Country Link
LU (1) LU101432B1 (fr)
WO (1) WO2021068042A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042446A1 (fr) * 1997-03-25 1998-10-01 Board Of Trustees Of The University Of Illinois Procede et appareillage permettant de produire des films minces et de deposer des nanoparticules
WO2000035524A2 (fr) * 1998-12-17 2000-06-22 Electrosols Ltd. Inhalateur nasal
US20050257515A1 (en) * 2004-05-18 2005-11-24 The Boeing Company A method of ionizing a liquid propellant and an electric thruster implementing such a method
US20110174304A1 (en) * 2010-01-21 2011-07-21 Triplett Ii Michael D Electrohydrodynamic aerosolization device having a time varying voltage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2071927T3 (es) * 1990-07-25 1995-07-01 Ici Plc Metodo de pulverizacion electrostatica.
US5992244A (en) * 1998-03-04 1999-11-30 Regents Of The University Of Minnesota Charged particle neutralizing apparatus and method of neutralizing charged particles
US20030226750A1 (en) * 2002-06-11 2003-12-11 Fenn John B. Electrospray dispersion in an alternating current mode
KR20130005307A (ko) * 2010-04-27 2013-01-15 시너스 테크놀리지, 인코포레이티드 전하가 가해진 액적의 기화 또는 원자화

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042446A1 (fr) * 1997-03-25 1998-10-01 Board Of Trustees Of The University Of Illinois Procede et appareillage permettant de produire des films minces et de deposer des nanoparticules
WO2000035524A2 (fr) * 1998-12-17 2000-06-22 Electrosols Ltd. Inhalateur nasal
US20050257515A1 (en) * 2004-05-18 2005-11-24 The Boeing Company A method of ionizing a liquid propellant and an electric thruster implementing such a method
US20110174304A1 (en) * 2010-01-21 2011-07-21 Triplett Ii Michael D Electrohydrodynamic aerosolization device having a time varying voltage

Also Published As

Publication number Publication date
LU101432B1 (en) 2021-04-15

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