US20100044474A1 - Electrostatic atomiser - Google Patents
Electrostatic atomiser Download PDFInfo
- Publication number
- US20100044474A1 US20100044474A1 US11/993,517 US99351706A US2010044474A1 US 20100044474 A1 US20100044474 A1 US 20100044474A1 US 99351706 A US99351706 A US 99351706A US 2010044474 A1 US2010044474 A1 US 2010044474A1
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- United States
- Prior art keywords
- fluid
- droplets
- atomiser
- orifices
- electrostatic atomiser
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- 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.)
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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
- 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
- B05B5/08—Plant for applying liquids or other fluent materials to objects
-
- 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
Definitions
- the invention relates to electrostatic atomisers which may have a wide variety of applications, particularly in the fields of drying, coating and mixing, where, despite a need for large flow rates, it is very important that the drops are of a consistent size, i.e. their diameters fall within a selected range of diameters.
- the present invention provides an electrostatic fluid-atomiser, comprising: a fluid inlet; one or more orifices out of which fluid emerges in an atomised form which comprises at least a first set of droplets of comparable size to each other and second set of droplets of comparable size to each other and of a smaller size to the droplets of the first set; a fluid channel connecting the fluid inlet to the orifice(s); and at least two charging electrodes for applying a charge to fluid passing through the fluid channel; wherein the electrostatic atomiser comprises a fluid droplet separator downstream of the orifices having a separator electrode which is either earthed or electrically charged and which applies an electrical force on the droplets which deflects the second set of smaller droplets to a droplet collector of the atomiser while allowing the first set of larger droplets to continue out of a droplet outlet of the atomiser.
- This configuration is advantageous because it allows the electrostatic fluid atomiser to output only fluid droplets of sizes falling within a selected range.
- the droplet collector can comprise an absorbent wall or a porous wall.
- the wall can be cylindrical and disposed surrounding the droplets as they leave the orifices.
- the fluid droplet connector can be connected to a fluid return line. The fluid return line can easily avoid crossing the path of the orifices when the droplet collector comprises a cylindrical wall surrounding the droplets emerging from the orifices.
- the fluid return line returns the collected droplets to the fluid input. This configuration maximises the efficiency of the electrostatic atomiser; there is no waste or only minimal waste.
- the orifices may comprise multiple orifices in close proximity to a substantially flat surface of one of the charging electrodes which spans the multiple orifices. This configuration will provide an ideal combination of evenly spread atomisation across multiple orifices and efficient collection of a second set of droplets.
- the orifices can be angled to generate a converging or a diverging stream of atomised droplets. In certain applications, generating directed streams will allow improved collection by the droplet collector, when compared to the use of parallel straight orifices.
- the orifices are preferably provided in an orifice wall and the droplet collector can then be provided with a plurality of portions projecting from the orifice wall between the orifices in a downstream direction. This will allow improved collection of small droplets within a central portion of an array of orifices as well as maintaining excellent small droplet collection from the outer portions of the ejected jet of fluid.
- the separator electrode of the fluid droplet separator could be electrically connected to one of said charging electrodes.
- FIG. 1 is a perspective view, partly in cross-section, of a first embodiment of an electrostatic fluid atomiser according to the present invention with components external to the atomiser shown schematically;
- FIGS. 2 a and 2 b show alternative geometries of orifices of the atomiser of FIG. 1 (or of the atomiser of FIGS. 3 and 4 );
- FIG. 3 shows in cross-section a second embodiment of electrostatic fluid atomiser according to the present invention, with components external to the atomiser again shown schematically;
- FIG. 4 shows a third embodiment of electrostatic fluid atomiser according to the present invention, with components external to the atomiser once more shown schematically.
- FIG. 1 shows an electrostatic atomiser 1 with a fluid inlet 2 .
- a fluid channel 3 connects the fluid inlet 3 to an array of multiple orifices 100 provided in an orifice wall 6 . Fluid passing through the channel 3 is electrostatically charged by a pair of charging electrodes comprising an electrode 4 and the orifice wall 5 .
- a high voltage source 18 is connected to apply a charge of a first polarity to the charging electrode 4 and to apply a charge of the opposite polarity to the wall 6 .
- the electrode 4 has a tip 5 which is substantially flat and spans the array of multiple orifices 100 .
- the fluid which may be of the any kind of chargeable fluid, is pumped into the fluid inlet by a pump 7 . Prior to pumping, the fluid is filtered by a filter 8 .
- the fluid On emerging from the orifices 6 the fluid is atomised, initially forming so-called “ligament” jets 9 , 10 and 11 , which shortly thereafter break up into substantially two sets of droplets which differ in size, a first set comprising droplets such as droplet 12 (a relatively large droplet) and a second set comprising droplets such as droplet 13 (a relatively small droplet).
- the small droplets will each inevitably have a lower mass with a much higher specific electrical charge than the large droplets.
- the atomiser 1 is provided with a fluid droplet separator 200 for separating the set of small-sized droplets (e.g. 12 ) from the set of large-sized droplets (e.g. 13 ), so that only the large-sized droplets leave a fluid outlet 201 of the atomiser.
- the separator 200 has a cylindrical wall 16 which surrounds the droplets leaving the orifices 100 .
- the wall 16 functions as a separator electrode and is either appropriately charged or earthed, in order to attract the droplets.
- the wall 16 is connected to the high voltage source and charged with the same polarity as the wall 6 .
- the smaller droplets are attracted to a greater extent than the larger droplets.
- the separator 200 has a layer 14 of a porous absorbent material located radially inwardly of the wall 16 .
- the wall 16 has a downstream portion which extends around a downstream end of the porous layer 14 , the wall 16 extending radially inwardly to form a fluid channel 15 at the downstream end of layer 14 .
- Collected fluid is withdrawn from channel 15 by a scavenge pump 17 .
- the scavenge pump 17 draws the fluid from the droplet collector 100 and relays the fluid to an accumulator tank 101 . Fluid from the tank 101 is then filtered and pumped back into the fluid inlet 2 .
- the voltage applied to the charging electrodes 4 , 6 and to the wall 16 (which functions as the separator electrode) and the sizes of orifices 100 may be adjusted in accordance with the properties of the fluid used, the flow rate chosen and the desired output droplet sizes.
- FIG. 1 the wall 6 is provided with multiple straight parallel orifices 100 .
- FIGS. 2 a and 2 b An alternative geometry of orifices is shown in FIGS. 2 a and 2 b .
- FIG. 2 a shows a diverging array of orifices 110 which would provide diverging streams of droplets.
- FIG. 2 b shows a converging array of orifices 111 which would provide converging streams of droplets.
- the use of the orifices 110 , 111 of FIGS. 3 a or 3 b may be preferred for certain fluids.
- FIG. 3 shows a second embodiment of electrostatic atomiser 19 .
- the atomiser has two charging electrodes 26 , 27 . They are both connected to the high voltage source 18 and a voltage of a first polarity is applied to electrode 26 and a voltage of a second opposite polarity is applied to the electrode formed by orifice wall 27 .
- the orifice wall 27 has a number of orifices referenced 20 , 21 , 22 , 23 . Fluid passing through orifices 20 , 21 , 22 , 23 is atomised and forms droplets in two sets, one set of smaller-sized droplets and one set of larger-sized droplets.
- the droplets all pass into a droplet separator 24 .
- the droplet separator 24 has an outer wall 25 which is charged or earthed to attract and collect small droplets from outer jets 28 , 29 .
- the separator wall 25 is connected to the high voltage source 18 and is charged with the same polarity as the orifice wall 27 .
- the droplet separator 24 also has a central collecting rod 30 , which is charged or earthed to attract and so collect droplets of central streams 31 and 32 .
- the electrode 30 is electrically connected to charging electrode 27 and is charged with the same polarity.
- Both the outer wall 25 and the rod 30 are provided with an absorbent layer; there is a layer 34 for wall 25 and a layer 35 for rod 30 .
- a scavenge pump 33 is provided to extract fluid collected by the rod 27 through a pipe 36 to be passed to an accumulator tank 101 .
- the pipe 36 passes through a central passage provided through electrode 26 .
- the lowermost surface of charging electrode 26 is provided with a roughened surface opposite the orifices 20 , 21 , 22 , 23 to improve the charging of the fluid, e.g. by the provision of faceted elements in a diamond coating or similar (as described in the applicant's own previous patent application PCT/GB2004/000458). Only the part of the surface opposite the orifices 20 , 21 , 22 , 23 need be roughened/coated.
- the invention also envisages using several spaced apart rods of the same type as rod 30 in a large multi-orifice array so as to minimise the occurrence of any small droplets exiting the atomiser.
- the rods would extend from the orifice wall 27 downwardly (i.e. downstream), would be spaced apart from one another and would extend from parts of the wall 27 located between the orifices in the wall 27 .
- FIG. 4 shows a further embodiment of electrostatic atomiser 39 , which has components identical to those of FIG. 1 ; identical components having identical reference numerals.
- it has an input fluid line 40 , charging electrode 41 , an array of multiple orifices 42 , 43 , 44 , 45 in an orifice wall 46 which also functions as a second charging electrode, and a droplet separator 47 with a charged or earthed external cylindrical droplet collector wall 48 .
- the collector wall 48 is connected to the high voltage source 18 and charged with the same polarity as the orifice wall 46 .
- a central rod 50 is located within a spray channel 49 in the separator 47 and the rod 50 is appropriately charged to repel the small charged droplets towards the wall 48 where they are collected.
- the top of the rod 50 is separated from the orifice wall 46 by an insulator 51 .
- the rod 50 is electrically connected to the charging electrode 41 by connector 52 .
- the planar bottom face of electrode 41 is provided with faceted elements only in the region facing the orifices 42 , 43 , 44 , 45 .
Abstract
The present invention relates to (with reference to FIG. 1) an electrostatic fluid atomiser which has a fluid inlet (2) and a fluid channel (3) leading fluid to a wall (6) in which orifices (100) are formed. Fluid passing out of the orifices (100) is atomised into droplets which fall into a first set of larger droplets (12) and a second set of smaller droplets (13). Two charging electrodes (4,6) charge fluid passing through the channel (3). A droplet separator (200) has a separator electrode (16) which applies an electrical force on the droplets and deflects the smaller droplets (13) to he collected by a droplet collector (15) while the larger droplets (12) continue undeflected out of a droplet (201) of the atomiser.
Description
- The invention relates to electrostatic atomisers which may have a wide variety of applications, particularly in the fields of drying, coating and mixing, where, despite a need for large flow rates, it is very important that the drops are of a consistent size, i.e. their diameters fall within a selected range of diameters.
- The closest prior art known is the applicant's own prior published patent application, PCT/GB2004/000458. This prior published patent application discloses the use of multiple orifice atomisers with a primary charging electrode spanning an array of orifices. With constant fluid flow such electrostatic atomisers produce two distinctly differently sized sets of droplets. Due to the physics of droplet formation each pair of larger sized droplets are separated by a smaller droplet. For example, the smaller sized droplets may have diameters between 20 and 80 microns, whilst the larger sized droplets may have diameters between 150 and 350 microns. Due to such differences in size, the smaller droplets will have much lower mass whilst having much higher specific electrical charge than the larger droplets. Since in many applications it is desirable to obtain fluid droplets of a consistent size, i.e. within a selected range of diameters, there is a need for an electrostatic atomiser which acts to separate larger droplets from smaller droplets.
- In a first aspect, the present invention provides an electrostatic fluid-atomiser, comprising: a fluid inlet; one or more orifices out of which fluid emerges in an atomised form which comprises at least a first set of droplets of comparable size to each other and second set of droplets of comparable size to each other and of a smaller size to the droplets of the first set; a fluid channel connecting the fluid inlet to the orifice(s); and at least two charging electrodes for applying a charge to fluid passing through the fluid channel; wherein the electrostatic atomiser comprises a fluid droplet separator downstream of the orifices having a separator electrode which is either earthed or electrically charged and which applies an electrical force on the droplets which deflects the second set of smaller droplets to a droplet collector of the atomiser while allowing the first set of larger droplets to continue out of a droplet outlet of the atomiser.
- This configuration is advantageous because it allows the electrostatic fluid atomiser to output only fluid droplets of sizes falling within a selected range.
- The droplet collector can comprise an absorbent wall or a porous wall. The wall can be cylindrical and disposed surrounding the droplets as they leave the orifices. The fluid droplet connector can be connected to a fluid return line. The fluid return line can easily avoid crossing the path of the orifices when the droplet collector comprises a cylindrical wall surrounding the droplets emerging from the orifices.
- The fluid return line returns the collected droplets to the fluid input. This configuration maximises the efficiency of the electrostatic atomiser; there is no waste or only minimal waste.
- The orifices may comprise multiple orifices in close proximity to a substantially flat surface of one of the charging electrodes which spans the multiple orifices. This configuration will provide an ideal combination of evenly spread atomisation across multiple orifices and efficient collection of a second set of droplets.
- The orifices can be angled to generate a converging or a diverging stream of atomised droplets. In certain applications, generating directed streams will allow improved collection by the droplet collector, when compared to the use of parallel straight orifices.
- The orifices are preferably provided in an orifice wall and the droplet collector can then be provided with a plurality of portions projecting from the orifice wall between the orifices in a downstream direction. This will allow improved collection of small droplets within a central portion of an array of orifices as well as maintaining excellent small droplet collection from the outer portions of the ejected jet of fluid.
- The separator electrode of the fluid droplet separator could be electrically connected to one of said charging electrodes.
- Preferred embodiments of the present invention will now be described with reference to the accompanying drawings, in which:
-
FIG. 1 is a perspective view, partly in cross-section, of a first embodiment of an electrostatic fluid atomiser according to the present invention with components external to the atomiser shown schematically; -
FIGS. 2 a and 2 b show alternative geometries of orifices of the atomiser ofFIG. 1 (or of the atomiser ofFIGS. 3 and 4 ); -
FIG. 3 shows in cross-section a second embodiment of electrostatic fluid atomiser according to the present invention, with components external to the atomiser again shown schematically; and -
FIG. 4 shows a third embodiment of electrostatic fluid atomiser according to the present invention, with components external to the atomiser once more shown schematically. -
FIG. 1 shows an electrostatic atomiser 1 with afluid inlet 2. Afluid channel 3 connects thefluid inlet 3 to an array ofmultiple orifices 100 provided in anorifice wall 6. Fluid passing through thechannel 3 is electrostatically charged by a pair of charging electrodes comprising an electrode 4 and theorifice wall 5. In the figure it can be seen that ahigh voltage source 18 is connected to apply a charge of a first polarity to the charging electrode 4 and to apply a charge of the opposite polarity to thewall 6. The electrode 4 has atip 5 which is substantially flat and spans the array ofmultiple orifices 100. The fluid, which may be of the any kind of chargeable fluid, is pumped into the fluid inlet by apump 7. Prior to pumping, the fluid is filtered by afilter 8. - On emerging from the
orifices 6 the fluid is atomised, initially forming so-called “ligament”jets - The atomiser 1 is provided with a
fluid droplet separator 200 for separating the set of small-sized droplets (e.g. 12) from the set of large-sized droplets (e.g. 13), so that only the large-sized droplets leave afluid outlet 201 of the atomiser. Theseparator 200 has acylindrical wall 16 which surrounds the droplets leaving theorifices 100. Thewall 16 functions as a separator electrode and is either appropriately charged or earthed, in order to attract the droplets. In the figure thewall 16 is connected to the high voltage source and charged with the same polarity as thewall 6. The smaller droplets are attracted to a greater extent than the larger droplets. Consequently, the smaller droplets are deflected to thewall 16 whilst the larger droplets will continue largely undeflected and exit thefluid outlet 201. Theseparator 200 has alayer 14 of a porous absorbent material located radially inwardly of thewall 16. Thewall 16 has a downstream portion which extends around a downstream end of theporous layer 14, thewall 16 extending radially inwardly to form afluid channel 15 at the downstream end oflayer 14. - Collected fluid is withdrawn from
channel 15 by ascavenge pump 17. Thescavenge pump 17 draws the fluid from thedroplet collector 100 and relays the fluid to anaccumulator tank 101. Fluid from thetank 101 is then filtered and pumped back into thefluid inlet 2. - The voltage applied to the
charging electrodes 4, 6 and to the wall 16 (which functions as the separator electrode) and the sizes oforifices 100 may be adjusted in accordance with the properties of the fluid used, the flow rate chosen and the desired output droplet sizes. - In the
FIG. 1 embodiment thewall 6 is provided with multiple straightparallel orifices 100. An alternative geometry of orifices is shown inFIGS. 2 a and 2 b.FIG. 2 a shows a diverging array oforifices 110 which would provide diverging streams of droplets.FIG. 2 b shows a converging array oforifices 111 which would provide converging streams of droplets. The use of theorifices FIGS. 3 a or 3 b may be preferred for certain fluids. -
FIG. 3 shows a second embodiment ofelectrostatic atomiser 19. This embodiment shares many components in common with the first embodiment ofFIG. 1 and identical components are given identical reference numerals. The atomiser has twocharging electrodes high voltage source 18 and a voltage of a first polarity is applied toelectrode 26 and a voltage of a second opposite polarity is applied to the electrode formed byorifice wall 27. Theorifice wall 27 has a number of orifices referenced 20, 21, 22, 23. Fluid passing throughorifices droplet separator 24. Thedroplet separator 24 has anouter wall 25 which is charged or earthed to attract and collect small droplets fromouter jets separator wall 25 is connected to thehigh voltage source 18 and is charged with the same polarity as theorifice wall 27. Thedroplet separator 24 also has acentral collecting rod 30, which is charged or earthed to attract and so collect droplets ofcentral streams 31 and 32. In the figure theelectrode 30 is electrically connected to chargingelectrode 27 and is charged with the same polarity. Both theouter wall 25 and therod 30 are provided with an absorbent layer; there is alayer 34 forwall 25 and alayer 35 forrod 30. Ascavenge pump 33 is provided to extract fluid collected by therod 27 through apipe 36 to be passed to anaccumulator tank 101. Thepipe 36 passes through a central passage provided throughelectrode 26. - The lowermost surface of charging
electrode 26 is provided with a roughened surface opposite theorifices orifices - The invention also envisages using several spaced apart rods of the same type as
rod 30 in a large multi-orifice array so as to minimise the occurrence of any small droplets exiting the atomiser. The rods would extend from theorifice wall 27 downwardly (i.e. downstream), would be spaced apart from one another and would extend from parts of thewall 27 located between the orifices in thewall 27. -
FIG. 4 shows a further embodiment ofelectrostatic atomiser 39, which has components identical to those ofFIG. 1 ; identical components having identical reference numerals. As with theFIG. 1 embodiment, it has aninput fluid line 40, chargingelectrode 41, an array ofmultiple orifices orifice wall 46 which also functions as a second charging electrode, and adroplet separator 47 with a charged or earthed external cylindricaldroplet collector wall 48. As shown in the figure thecollector wall 48 is connected to thehigh voltage source 18 and charged with the same polarity as theorifice wall 46. Additionally, acentral rod 50 is located within aspray channel 49 in theseparator 47 and therod 50 is appropriately charged to repel the small charged droplets towards thewall 48 where they are collected. The top of therod 50 is separated from theorifice wall 46 by aninsulator 51. Therod 50 is electrically connected to the chargingelectrode 41 byconnector 52. The planar bottom face ofelectrode 41 is provided with faceted elements only in the region facing theorifices
Claims (25)
1. An electrostatic atomiser, comprising:
a fluid inlet;
one or more orifices out of which the fluid emerges in an atomised form which comprises at least a first set of droplets of comparable size to each other and a second set of droplets of comparable size to each other and of a smaller size to the droplets of the first set;
a fluid channel connecting the fluid inlet to the orifice(s); and
at least two charging electrodes for applying a charge to fluid passing through the fluid channel; wherein
the electrostatic atomiser comprises a fluid droplet separator extending downstream of the orifices having a first separator electrode which is either earthed or electrically charged and which applies an electrical force on the droplets which deflects the second set of smaller droplets to a droplet collector while allowing the first set of larger droplets to continue out of a droplet outlet of the atomiser; and
the droplet collector is located upstream of the fluid outlet whereby only the larger droplets of the first set are output by the atomiser out of the droplet outlet, the smaller droplets of the first set having been collected within the atomiser by the droplet collector.
2. An electrostatic atomiser according to claim 1 wherein said droplet collector comprises an absorbent layer.
3. An electrostatic atomiser as claimed in claim 1 wherein the first separator electrode applies an attractive electrical force on the fluid droplets attracting the fluid droplets to move towards the first separator electrode.
4. An electrostatic atomiser as claimed in claim 1 wherein the first separator electrode is a cylindrical wall disposed around the orifices and extending downstream.
5. An electrostatic atomiser as claimed in claim 4 comprising a second separator electrode extending spaced apart from and parallel to the cylindrical wall and either earthed or charged to apply an attractive electrical force on the droplets, the atomiser having a second fluid droplet collector which collects the droplets attracted by the second separator electrode.
6. An electrostatic atomiser as claimed in claim 5 wherein the second fluid droplet collector is connected to a fluid return via a conduit which passes through passages formed in the charging electrodes, the fluid return returning fluid collected by the droplet collector to the fluid inlet.
7. An electrostatic atomiser as claimed in claim 1 wherein the orifices are provided in an orifice wall and said fluid droplet separator comprises a plurality of fluid collectors spaced apart from each other and extending from locations on the orifice wall located between the orifices and extending from the orifice wall in a downstream direction.
8. An electrostatic atomiser as claimed in claim 7 wherein each of the fluid collectors is associated with a separator electrode individual thereto which is electrically charged to attract the fluid droplets to the fluid collector.
9. An electrostatic atomiser as claimed in claim 7 wherein the orifice wall functions as a charging electrode.
10. An electrostatic atomiser as claimed in claim 3 comprising a second separator electrode spaced apart from the first separator electrode and electrically charged with a voltage of a different polarity to the first separator electrode, and which applies a repelling electrical force on the fluid droplets repelling the fluid droplets away from the second electrode towards the droplet collector.
11. An electrostatic atomiser as claimed in claim 1 wherein the orifices are provided in an orifice wall which also functions as one of the charging electrodes.
12. An electrostatic atomiser as claimed in claim 1 further comprising a fluid return for returning fluid collected by the droplet collector to the fluid inlet.
13. An electrostatic atomiser as claimed in claim 1 wherein the atomiser incorporates multiple orifices in close proximity to a substantially planar surface of a charging electrode which spans said multiple orifices.
14. An electrostatic atomiser as claimed in claim 1 comprising orifices angled to generate converging streams of droplets.
15. An electrostatic atomiser as claimed in claim 1 comprising orifices angled to generate diverging streams of droplets.
16. An electrostatic atomiser as claimed in claim 1 , wherein the first separator electrode is electrically connected to one of said charging electrodes.
17. An electrostatic atomiser as claimed in claim 5 wherein the second separator electrode is electrically connected to one of said charging electrodes.
18. An electrostatic atomiser as claimed in claim 2 wherein the first separator electrode applies an attractive electrical force on the fluid droplets attracting the fluid droplets to move towards the first separator electrode.
19. An electrostatic atomiser as claimed in claim 3 wherein the first separator electrode is a cylindrical wall disposed around the orifices and extending downstream.
20. An electrostatic atomiser as claimed in claim 19 comprising a second separator electrode extending spaced apart from and parallel to the cylindrical wall and either earthed or charged to apply an attractive electrical force on the droplets, the atomiser having a second fluid droplet collector which collects the droplets attracted by the second separator electrode.
21. An electrostatic atomiser as claimed in claim 20 wherein the second fluid droplet collector is connected to a fluid return via a conduit which passes through passages formed in the charging electrodes, the fluid return returning fluid collected by the droplet collector to the fluid inlet.
22. An electrostatic atomiser as claimed in claim 21 wherein the orifices are provided in an orifice wall and said fluid droplet separator comprises a plurality of fluid collectors spaced apart from each other and extending from locations on the orifice wall located between the orifices and extending from the orifice wall in a downstream direction.
23. An electrostatic atomiser as claimed in claim 22 wherein each of the fluid collectors is associated with a separator electrode individual thereto which is electrically charged to attract the fluid droplets to the fluid collector.
24. An electrostatic atomiser as claimed in claim 23 wherein the orifice wall functions as a charging electrode.
25. An electrostatic atomiser as claimed in claim 3 , wherein the first separator electrode is electrically connected to one of said charging electrodes.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0514000.9 | 2005-07-08 | ||
GBGB0514000.9A GB0514000D0 (en) | 2005-07-08 | 2005-07-08 | Electrostatic atomiser |
PCT/GB2006/002506 WO2007007050A1 (en) | 2005-07-08 | 2006-07-06 | Electrostatic atomiser |
Publications (1)
Publication Number | Publication Date |
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US20100044474A1 true US20100044474A1 (en) | 2010-02-25 |
Family
ID=34896911
Family Applications (1)
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US11/993,517 Abandoned US20100044474A1 (en) | 2005-07-08 | 2006-07-06 | Electrostatic atomiser |
Country Status (7)
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US (1) | US20100044474A1 (en) |
EP (1) | EP1901851A1 (en) |
JP (1) | JP2009500160A (en) |
CN (1) | CN101218037A (en) |
AU (1) | AU2006268415A1 (en) |
GB (1) | GB0514000D0 (en) |
WO (1) | WO2007007050A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109996610A (en) * | 2016-11-28 | 2019-07-09 | 阿耐思特岩田株式会社 | Electrostatic atomizer and electrostatic spraying method |
US10815046B2 (en) | 2018-03-03 | 2020-10-27 | Byoplanet International, LLC | Size-selective aerosol nozzle device |
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WO2014010596A1 (en) * | 2012-07-09 | 2014-01-16 | 株式会社セラフト | Deliquescent component-containing mist-releasing pin member and electrostatic atomizer using same |
JP2014042872A (en) * | 2012-08-24 | 2014-03-13 | Sumitomo Chemical Co Ltd | Electrostatic spray device |
CN104759367A (en) * | 2015-05-04 | 2015-07-08 | 石河子开发区汇智元科技有限责任公司 | Enhancement type static nozzle |
CN108225987A (en) * | 2017-12-27 | 2018-06-29 | 天津科技大学 | Solve the System and method for that micron order drop hits spherical surface freezing coating |
CN109174456B (en) * | 2018-08-23 | 2021-11-26 | 北京工业大学 | Device and method for atomizing wet electrostatic dust collection |
CN110051466B (en) * | 2019-04-15 | 2021-07-20 | 江苏师范大学 | A drip medicine system for ophthalmology is treated |
CN112974006B (en) * | 2021-02-09 | 2023-05-05 | 宁波凯普电子有限公司 | Method and device for improving charge quantity in electrostatic sprayer liquid medicine |
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DE69025256T2 (en) * | 1989-10-11 | 1996-06-27 | Canon Kk | Apparatus and method for separating particles from liquid suspended particles in connection with their properties |
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2005
- 2005-07-08 GB GBGB0514000.9A patent/GB0514000D0/en not_active Ceased
-
2006
- 2006-07-06 CN CNA2006800245197A patent/CN101218037A/en active Pending
- 2006-07-06 US US11/993,517 patent/US20100044474A1/en not_active Abandoned
- 2006-07-06 WO PCT/GB2006/002506 patent/WO2007007050A1/en active Application Filing
- 2006-07-06 AU AU2006268415A patent/AU2006268415A1/en not_active Abandoned
- 2006-07-06 JP JP2008519996A patent/JP2009500160A/en active Pending
- 2006-07-06 EP EP06755724A patent/EP1901851A1/en not_active Withdrawn
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US3380584A (en) * | 1965-06-04 | 1968-04-30 | Atomic Energy Commission Usa | Particle separator |
US4168460A (en) * | 1976-07-22 | 1979-09-18 | Max-Planck Gesellschaft Zur Forderung Der Wissenschaften E.V. | Particle sorting apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109996610A (en) * | 2016-11-28 | 2019-07-09 | 阿耐思特岩田株式会社 | Electrostatic atomizer and electrostatic spraying method |
US10815046B2 (en) | 2018-03-03 | 2020-10-27 | Byoplanet International, LLC | Size-selective aerosol nozzle device |
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WO2007007050A1 (en) | 2007-01-18 |
JP2009500160A (en) | 2009-01-08 |
GB0514000D0 (en) | 2005-08-17 |
EP1901851A1 (en) | 2008-03-26 |
AU2006268415A1 (en) | 2007-01-18 |
AU2006268415A2 (en) | 2008-05-15 |
CN101218037A (en) | 2008-07-09 |
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