Fluidic nozzle and improved moving vortex generating fluidic oscillator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05B-001/00
B05B-001/08
B60S-001/52
출원번호
US-0738024
(2015-06-12)
등록번호
US-10092913
(2018-10-09)
발명자
/ 주소
Gopalan, Shridhar
Hartranft, Evan
출원인 / 주소
DLHBOWLES, INC.
대리인 / 주소
McDonald Hopkins LLC
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A fluidic circuit configured to spray an oscillating pattern of fluid droplets, having an inlet in fluid communication with a source and including a power nozzle with an oscillation chamber having a fluid jet steering section in fluid communication with the power nozzle and having either (a) a first
A fluidic circuit configured to spray an oscillating pattern of fluid droplets, having an inlet in fluid communication with a source and including a power nozzle with an oscillation chamber having a fluid jet steering section in fluid communication with the power nozzle and having either (a) a first fluid pressure accumulating volume opposite a second fluid pressure accumulating volume or (b) a first fluid jet attachment feature opposing a second fluid jet attachment feature. The fluid jet steering section is in fluid communication with and emits a fluid jet into an oscillation inducing interaction region with opposing first and second side wall ears or features which define an oscillation inducing interaction region in the oscillation chamber for causing the jet of fluid to rhythmically sweep back and forth between the sidewalls in the oscillation chamber and create a distally projecting oscillating spray.
대표청구항▼
1. A fluidic nozzle in the form of a first fluidic oscillator configured to spray an oscillating pattern of fluid droplets, said oscillator comprising: an inlet configured to receive pressurized fluid;an oscillation chamber having an upstream end, a downstream end, first and second sidewalls, and an
1. A fluidic nozzle in the form of a first fluidic oscillator configured to spray an oscillating pattern of fluid droplets, said oscillator comprising: an inlet configured to receive pressurized fluid;an oscillation chamber having an upstream end, a downstream end, first and second sidewalls, and an oscillator axis extending between said upstream and downstream ends;a power nozzle, in fluid communication via a downstream-tapered feed for issuing a jet of said pressurized fluid into said oscillation chamber;an outlet aperture at said downstream end for issuing said jet of fluid into ambient space, wherein said outlet aperture is positioned in alignment with said power nozzle along said oscillator axis;a fluid jet steering section in said oscillation chamber in fluid communication with said power nozzle and defined between opposed first and second steering sections of said first and second sidewalls, respectively, that diverge in a downstream direction from one another and from said oscillator axis;an oscillation inducing interaction region in downstream fluid communication with said fluid jet steering section and configured to receive said fluid jet therefrom, wherein said oscillation inducing interaction region is defined between opposing first and second interaction region sections of said first and second sidewalls, said interaction region sidewall sections being disposed symmetrically relative to said oscillator axis and substantially diverging from one another and said oscillator axis;wherein said first and second interaction region sidewall sections have opposed respective first and second setback sections configured to cause said fluid jet to alternately attach and detach from its respective interaction region sidewall and thereby cyclically sweep back and forth between said sidewalls in said oscillation chamber; andwherein said first and second setback sections further comprising first and second lateral slot ends configured as concave regions defined in said first and second steering sections of said first and second sidewalls. 2. The fluidic nozzle of claim 1, wherein said interaction region includes opposing generally ear-shaped protuberances projecting inwardly from said respective opposing interaction region sidewall sections at locations downstream of said setback sections and configured to create respective alternating jet steering vortices on respective sides of the fluid jet from fluid in the fluid jet. 3. The fluidic nozzle of claim 2, wherein said protuberances are configured and positioned to create said vortices as moving circulating vortices alternating on opposite sides of said fluid jet in said interaction chamber, the circulating vortices moving distally and proximally in a cyclical manner. 4. The fluidic nozzle of claim 1, wherein said first and second steering sections each diverge at a first selected sidewall divergence angle from the oscillator axis to provide an acute divergence angle between said sidewalls to promote spreading of the fluid jet as its fluid leaves the power nozzle. 5. The fluidic nozzle of claim 4, wherein said acute divergence angle between said sidewalls is less than 60 degrees. 6. The fluidic nozzle of claim 5, wherein said acute divergence angle between said sidewalls is in the range of 30 to 40 degrees. 7. The fluidic nozzle of claim 5, wherein said first selected sidewall divergence angle is 20 degrees from said oscillator axis. 8. The fluidic nozzle of claim 1, wherein the downstream axial distance FL between the upstream end of the interaction region and a point of maximum concavity in each of said first and second setback sections is less than or equal to four times the width Pw of the power nozzle at the upstream end of the interaction chamber. 9. The fluidic nozzle of claim 8, wherein FL is configured to be 3.7 times Pw. 10. The fluidic nozzle of claim 8, wherein the minimum transverse distance Ew between said ear-shaped protuberances is greater than six times Pw, and wherein the downstream axial distance EL between the upstream end of the interaction region and the point of minimum transverse distance between said ear-shaped protuberances is greater than 8.5 times Pw. 11. The fluidic nozzle of claim 8, wherein Ew is approximately 7.2 times Pw, and wherein EL is approximately 9.57 times Pw. 12. The fluidic nozzle of claim 8, wherein the maximum width lw of said interaction region at an axial location between said setback sections and said ear-shaped protuberances is approximately 9.6 times Pw, and the length IL of said interaction region between said power nozzle and said outlet aperture is approximately 12.2 times Pw. 13. The fluidic nozzle of claim 1, wherein said first fluidic oscillator is defined in a fluid-impermeable substrate, and further comprising a second fluidic oscillator defined in said substrate, wherein said substrate is substantially planar and has first and second opposite sides, wherein said second fluidic oscillator is defined in said second side and said first fluidic oscillator is defined in said first side; wherein said second fluidic oscillator includes an inlet in fluid communication with said inlet of said first fluidic oscillator; andwherein said second fluidic oscillator includes an outlet aperture for issuing a second oscillating jet of fluid into ambient space. 14. The moving vortex-generating fluidic oscillator circuit of claim 1, wherein said fluidic oscillator is a first fluidic oscillator defined in a fluid-impermeable substrate, and further comprising a second fluidic oscillator defined in said substrate, wherein said substrate is substantially planar and has first and second opposite sides, wherein said second fluidic oscillator is defined in said second side and said first fluidic oscillator is defined in said first side; wherein said second fluidic oscillator comprises an inlet in fluid communication with said first oscillator's inlet; andwherein said second fluidic oscillator comprises an outlet aperture for issuing a second oscillating jet of fluid into ambient space. 15. The fluidic nozzle of claim 1 wherein said downstream-tapered feed has an arcuate bell-shape configured to cause spreading of the fluid jet as it leaves the power nozzle. 16. A moving vortex-generating fluidic oscillator circuit configured to generate an oscillating pattern of fluid droplets, comprising: a fluidic oscillator inlet adapted for fluid communication with a source of pressurized fluid, and a power nozzle where said inlet and said power nozzle are aligned along a central fluid flow path axis;said oscillator further including an oscillation chamber having an upstream end with an inlet coupled to said power nozzle for issuing a jet of fluid into said oscillation chamber, and a downstream end having an outlet aperture for issuing a jet of fluid into ambient space;wherein said oscillation chamber has a vortex generating fluid jet steering section in fluid communication with said power nozzle and having first and second symmetrically diverging sidewalls defining first and second vortex circulation generating set back features;said first vortex circulation generating set back feature diverging and then converging relative to said flow path axis in a downstream direction and configured to generate a first periodically varying vortex having a first circulation orientation, and said second vortex circulation generating set back feature diverging and then converging relative to said flow path axis and configured to generate a second periodically varying vortex having a second circulation orientation alternately with said first vortex, wherein said second vortex circulation orientation opposes the first vortex circulation orientation;wherein said fluid jet steering section is in fluid communication with and is configured to emit said jet of fluid as a laterally oscillating fluid jet into an oscillation inducing interaction region with downstream diverging sidewalls; andwherein said opposing first and second sidewalls are configured to intersect opposing top and bottom walls to define said oscillation inducing interaction region in said oscillation chamber to cause said first and second vortices to alternately move distally and proximally in phase opposition to cause said jet of fluid to rhythmically sweep back and forth between said sidewalls in said oscillation chamber. 17. The moving vortex-generating fluidic oscillator circuit of claim 16, further comprising: a downstream-tapered feed disposed to deliver said pressurized fluid from said source to said power nozzle;wherein said downstream-tapered feed has a bell-shape configured to cause spreading of the fluid jet as it leaves the power nozzlewherein the interaction region and said fluid jet steering section are quickly filled with fluid from said source, and the fluidic oscillator is activated to generate said oscillating spray pattern. 18. The moving vortex-generating fluidic oscillator circuit of claim 16, wherein said interaction region includes opposing smoothly contoured generally ear-shaped protuberances projecting inwardly from said opposing first and second side walls. 19. The moving vortex-generating fluidic oscillator circuit of claim 18, wherein said fluidic oscillator is formed in a fluid-impermeable substrate, said oscillator further comprising first and second lateral slot ends configured as concave regions defined in said first and second steering sections of said first and second sidewalls, respectively, such that said first lateral slot end and said second lateral slot end are in fluid communication with one another and with said power nozzle, and wherein said fluid jet steering section is in fluid communication with and emits said fluid jet into the oscillation inducing interaction region. 20. The moving vortex-generating fluidic oscillator circuit of claim 19, wherein said first sidewall and second sidewalls have respective first and second diverging sidewall segments, said first diverging sidewall segment diverging at a first selected sidewall divergence angle from the central fluid flow path axis, said second diverging sidewall segment diverging away from said central fluid flow path axis and said first sidewall to provide an acute sidewall to sidewall divergence angle and promoting the spreading of the jet as it leaves the power nozzle. 21. The moving vortex-generating fluidic oscillator circuit of claim 20, wherein said acute sidewall to sidewall divergence angle is less than 60 degrees. 22. The moving vortex-generating fluidic oscillator circuit of claim 21, wherein said acute sidewall to sidewall divergence angle is in the range of 30 to 40 degrees. 23. The moving vortex-generating fluidic oscillator circuit of claim 22, wherein said oscillation chamber's first selected sidewall divergence angle is 20 degrees from said central fluid flow path axis. 24. The moving vortex-generating fluidic oscillator circuit of claim 19, wherein the downstream axial distance FL between the upstream end of the interaction region and a point of maximum concavity in each of said first and second setback sections is less than or equal to four times the width Pw of the power nozzle at the upstream end of the interaction chamber. 25. The moving vortex-generating fluidic oscillator circuit of claim 24, wherein said FL is approximately 3.7 times Pw. 26. The moving vortex-generating fluidic oscillator circuit of claim 24, wherein the minimum transverse distance Ew between said ear-shaped protuberances is greater than six times Pw, and wherein the downstream axial distance EL between the upstream end of the interaction region and the point of minimum transverse distance between said ear-shaped protuberances is greater than 8.5 times Pw. 27. The moving vortex-generating fluidic oscillator circuit of claim 26, wherein Ew is approximately 7.2 times Pw, and wherein EL is approximately 9.57 times Pw. 28. The moving vortex-generating fluidic oscillator circuit of claim 26, wherein the maximum width lw of said interaction region at an axial location between said setback sections and said ear-shaped protuberances is approximately 9.6 times Pw, and the length IL of said interaction region between said power nozzle and said outlet aperture is approximately 12.2 times Pw. 29. The moving vortex-generating fluidic oscillator circuit of claim 16, wherein said steering section comprises a first cavity in said first sidewall defining a first fluid pressure accumulating volume opposite a second cavity in said second sidewall defining a second fluid pressure accumulating volume; wherein said first cavity and said second cavity are in fluid communication with one another and with said power nozzle; andfurther comprising an oscillation inducing interaction region in downstream fluid communication with said fluid jet steering section and configured to receive said fluid jet therefrom.
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이 특허에 인용된 특허 (7)
Bray ; Jr. Harry C. (Laurel MD), Cold weather fluidic fan spray devices and method.
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