Electrostatic nozzle apparatus

• US 7,160,391 B2
• Filed: 10/20/2004
• Issued: 01/09/2007
• Est. Priority Date: 10/20/2004
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Comstock, Krista Beth, Willey, Alan David, Gartstein, Vladimir, Gaw, Chinto Benjamin, Jefferson, Jean Angela
• Primary Examiner(s): Tadesse; Yewebdar
• Application Number:
  US10/969,668
• Publication Number:
  US 20060081178A1
• Time in Patent Office: 811 Days
• Field of Search: 118/620, 118/621, 118/627, 118/629, 118/313, 96/27, 96/53, 96/71, 239/690, 239/696, 427/475, 427/479, 427/483, 95/71
• US Class Current: 118/629
• CPC Class Codes: B03C 3/16 wet type
• CPC Class Codes: B03C 3/38 Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
• CPC Class Codes: B05B 1/14 with multiple outlet openings B05B1/02, B05B1/26 take precedence; with strainers in or outside the outlet opening
• CPC Class Codes: B05B 5/025 Discharge apparatus, e.g. electrostatic spray guns

Abstract

A nozzle spray head is provided for use in a dynamic electrostatic air filter, in which the nozzle spray head assembly exhibits multiple nozzle orifices as outlet ports, which extend from the bottom of the nozzle body such that the distances between the outlet ports and a target member are not constant. The charged multiple outlet ports exhibit a more uniform electric field at their tips, thereby enabling a better and more uniform spray pattern to be emitted by each of the individual outlet ports. In one embodiment, the outlet ports are grouped in concentric circles, in which the innermost circle comprises outlet ports of the greatest lengths, and the outermost circle comprises outlet ports of the smallest lengths.

Claims

1. An electrostatic nozzle apparatus, comprising:

a nozzle spray head having;

a nozzle body, a fluid inlet at a first surface of the nozzle body, a plurality of fluid outlets at a second surface of the nozzle body, said plurality of fluid outlets comprising a plurality of individual nozzle outlet ports, an internal fluid channel between said fluid inlet and fluid outlets, and an electrode that is electrically charged to a predetermined first voltage magnitude, wherein said electrode is positioned proximal to said fluid channel and imparts an electrical charge to at least a portion of a fluid moving through said fluid channel; and

a target member that is spaced-apart from said plurality of individual nozzle outlet ports, said target member exhibiting a proximal surface that faces said plurality of individual nozzle outlet ports;

wherein;

said plurality of individual nozzle outlet ports extend at predetermined lengths from said second surface of the nozzle body to a plurality of outlet orifices, such that a plurality of predetermined distances are created between said plurality of outlet orifices and said proximal surface of the target member, and

said predetermined distances between said proximal surface and the plurality of outlet orifices are not substantially constant, for one of the plurality of individual nozzle outlet ports as compared to at least another one of the plurality of individual nozzle outlet ports, and wherein the predetermined lengths between said second surface and the plurality of outlet orifices exhibit at least one slope, taken along a radial line that extends outward from a central point of said second surface.

2. The electrostatic nozzle apparatus as recited in claim 1, wherein said plurality of individual nozzle outlet ports is arranged in a pattern of at least two concentric circles.

3. The electrostatic nozzle apparatus as recited in claim 2, wherein said nozzle spray head exhibits:

(a) a first spacing dimension, taken along a radial line of said second surface, between a first of said at least two concentric circles and a second of said at least two concentric circles, and (b) a second spacing dimension, taken along a radial line of said second surface, between said second of said at least two concentric circles and a third of said at least two concentric circles; and

wherein said first spacing dimension is not equal in distance to said second spacing dimension.

4. The electrostatic nozzle apparatus as recited in claim 1, wherein said plurality of individual nozzle outlet ports is arranged in a non-circular pattern.

5. The electrostatic nozzle apparatus as recited in claim 1, wherein said at least one slope is constant along the entire radial line.

6. The electrostatic nozzle apparatus as recited in claim 5, wherein said at least one slope is contoured, and thus not constant along the entire radial line.

7. The electrostatic nozzle apparatus as recited in claim 1, wherein said plurality of individual nozzle outlet ports are sized and positioned in a manner that tends to minimize a gradient in an electric field magnitude between one of said plurality of outlet orifices and another one of said plurality of outlet orifices.

8. The electrostatic nozzle apparatus as recited in claim 1, wherein:

the proximal surface of said target member is substantially planar; and

said predetermined lengths from said second surface of the nozzle body to said plurality of outlet orifices are not constant, for one of the plurality of individual nozzle outlet ports as compared to at least another one of the plurality of individual nozzle outlet ports.

9. The electrostatic nozzle apparatus as recited in claim 1, wherein:

the proximal surface of said target member is not substantially planar; and

said predetermined lengths from said second surface of the nozzle body to said plurality of outlet orifices are substantially constant, for all of the plurality of individual nozzle outlet ports.

10. An electrostatic nozzle apparatus, comprising:

a nozzle spray head having;

a nozzle body, a fluid inlet at a first surface of the nozzle body, a plurality of fluid outlets at a second surface of the nozzle body, said plurality of fluid outlets comprising a plurality of individual nozzle outlet ports that extend at predetermined lengths from said second surface of the nozzle body to one of a plurality of outlet orifices, an internal fluid channel between said fluid inlet and fluid outlets, and an electrode that is electrically charged to a predetermined first voltage magnitude, wherein said electrode is positioned proximal to said fluid channel and imparts an electrical charge to at least a portion of a fluid moving through said fluid channel; and

a target member that is spaced-apart from said plurality of individual nozzle outlet ports, said target member exhibiting a proximal surface that faces said plurality of individual nozzle outlet ports;

wherein said plurality of individual nozzle outlet ports are sized and positioned in a manner that tends to minimize a gradient in an electric field magnitude between one of said plurality of outlet orifices and another one of said plurality of outlet orifices, wherein said predetermined lengths between said second surface and each of the plurality of outlet orifices are not substantially constant for one of the plurality of individual nozzle outlet ports as compared to at least another one of the plurality of individual nozzle outlet ports, and wherein the proximal surface of said target member is substantially planar.

11. The electrostatic nozzle apparatus as recited in claim 10, wherein said plurality of individual nozzle outlet ports are sized and positioned so as to exhibit a substantially uniform electric field magnitude at each of the plurality of outlet orifices.

12. The electrostatic nozzle apparatus as recited in claim 10, wherein said predetermined lengths between said second surface and each of the plurality of outlet orifices are substantially constant for all of the plurality of individual nozzle outlet ports.

13. The electrostatic nozzle apparatus as recited in claim 12. wherein the proximal surface of said target member is not substantially planar.

14. The electrostatic nozzle apparatus as recited in claim 10, wherein said plurality of individual nozzle outlet ports is arranged in a pattern of at least two concentric circles.

15. The electrostatic nozzle apparatus as recited in claim 14, wherein said nozzle spray head exhibits:

(a) a first spacing dimension, taken along a radial line of said second surface, between a first of said at least two concentric circles and a second of said at least two concentric circles, and (b) a second spacing dimension, taken along a radial line of said second surface, between said second of said at least two concentric circles and a third of said at least two concentric circles; and

wherein said first spacing dimension is not equal in distance to said second spacing dimension.

16. The electrostatic nozzle apparatus as recited in claim 14, wherein said nozzle spray head exhibits:

(a) a first spacing dimension, taken along a radial line of said second surface, between a first of said at least two concentric circles and a second of said at least two concentric circles, and (b) a second spacing dimension, taken along a radial line of said second surface, between said second of said at least two concentric circles and a third of said at least two concentric circles; and

wherein said first spacing dimension is equal in distance to said second spacing dimension.

17. The electrostatic nozzle apparatus as recited in claim 10, wherein said predetermined lengths between said second surface and each of the plurality of outlet orifices are substantially constant for all of the plurality of individual nozzle outlet ports;

and wherein a first group of said plurality of individual nozzle outlet ports is charged to a first voltage magnitude, while a second group of said plurality of individual nozzle outlet ports is charged to a second voltage magnitude that is different from said first voltage magnitude.

18. An electrostatic nozzle apparatus, comprising:

a nozzle spray head having;

a nozzle body, a fluid inlet at a first surface of the nozzle body, a plurality of fluid outlets at a second surface of the nozzle body, said plurality of fluid outlets comprising a plurality of individual nozzle outlet ports, an internal fluid channel between said fluid inlet and fluid outlets, and an electrode that is electrically charged to a predetermined first voltage magnitude, wherein said electrode is positioned proximal to said fluid channel and imparts an electrical charge to at least a portion of a fluid moving through said fluid channel;

wherein said nozzle spray head exhibits;

(a) a first spacing dimension, taken along a radial line of said second surface, between a first of said at least two concentric circles and a second of said at least two concentric circles, and (b) a second spacing dimension, taken along a radial line of said second surface, between said second of said at least two concentric circles and a third of said at least two concentric circles; and

wherein said first spacing dimension is not equal in distance to said second spacing dimension; and

a target member that is spaced-apart from said plurality of individual nozzle outlet ports, said target member exhibiting a proximal surface that faces said plurality of individual nozzle outlet ports, wherein said plurality of individual nozzle outlet ports extend at predetermined lengths from said second surface of the nozzle body to a plurality of outlet orifices, such that a plurality of predetermined distances are created between said plurality of outlet orifices and said proximal surface of the target member, wherein said plurality of individual nozzle outlet ports is arranged in a pattern of at least two concentric circles; and

said predetermined distances between said proximal surface and the plurality of outlet orifices are not substantially constant, for one of the plurality of individual nozzle outlet ports as compared to at least another one of the plurality of individual nozzle outlet ports.

19. An electrostatic nozzle apparatus, comprising:

a nozzle spray head having;

a nozzle body, a fluid inlet at a first surface of the nozzle body, a plurality of fluid outlets at a second surface of the nozzle body, said plurality of fluid outlets comprising a plurality of individual nozzle outlet ports, an internal fluid channel between said fluid inlet and fluid outlets, and an electrode that is electrically charged to a predetermined first voltage magnitude, wherein said electrode is positioned proximal to said fluid channel and imparts an electrical charge to at least a portion of a fluid moving through said fluid channel; and

a target member that is spaced-apart from said plurality of individual nozzle outlet ports, said target member exhibiting a proximal surface that faces said plurality of individual nozzle outlet ports;

wherein;

said plurality of individual nozzle outlet ports extend at predetermined lengths from said second surface of the nozzle body to a plurality of outlet orifices, such that a plurality of predetermined distances are created between said plurality of outlet orifices and said proximal surface of the target member, and

said predetermined distances between said proximal surface and the plurality of outlet orifices are not substantially constant, for one of the plurality of individual nozzle outlet ports as compared to at least another one of the plurality of individual nozzle outlet ports, and wherein the proximal surface of said target member is substantially planar; and

said predetermined lengths from said second surface of the nozzle body to said plurality of outlet orifices are not constant, for one of the plurality of individual nozzle outlet ports as compared to at least another one of the plurality of individual nozzle outlet ports.

20. An electrostatic nozzle apparatus, comprising:

a nozzle spray head having;

a nozzle body, a fluid inlet at a first surface of the nozzle body, a plurality of fluid outlets at a second surface of the nozzle body, said plurality of fluid outlets comprising a plurality of individual nozzle outlet ports that extend at predetermined lengths from said second surface of the nozzle body to one of a plurality of outlet orifices, an internal fluid channel between said fluid inlet and fluid outlets, and an electrode that is electrically charged to a predetermined first voltage magnitude, wherein said electrode is positioned proximal to said fluid channel and imparts an electrical charge to at least a portion of a fluid moving through said fluid channel; and

a target member that is spaced-apart from said plurality of individual nozzle outlet ports, said target member exhibiting a proximal surface that faces said plurality of individual nozzle outlet ports;

wherein said plurality of individual nozzle outlet ports are sized and positioned in a manner that tends to minimize a gradient in an electric field magnitude between one of said plurality of outlet orifices and another one of said plurality of outlet orifices, wherein said plurality of individual nozzle outlet ports is arranged in a pattern of at least two concentric circles, and wherein said nozzle spray head exhibits;

(a) a first spacing dimension, taken along a radial line of said second surface, between a first of said at least two concentric circles and a second of said at least two concentric circles, and (b) a second spacing dimension, taken along a radial line of said second surface, between said second of said at least two concentric circles and a third of said at least two concentric circles; and

wherein said first spacing dimension is not equal in distance to said second spacing dimension.