Compact low flow rate fluidic nozzle for spraying and cleaning applications having a reverse mushroom insert geometry

Patent metadata

Field	Value
Publication number	US-11305297-B2
Application number	US-201816000141-A
Country	US
Kind code	B2
Filing date	Jun 5, 2018
Priority date	Jun 5, 2017
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

The invention relates to various low flow rate fluidic nozzle inserts having a reverse mushroom-shaped mushroom insert geometry that are useful for a wide range of spraying and cleaning applications. In one embodiment, the present invention relates to fluidic nozzle inserts that are able to perform at low flow rates with geometrical and dimensional limitations. In still another embodiment, the present invention relates to compact fluidic nozzle inserts that provide a manner by which to attain a desired level of performance in a fluidic nozzle assembly for small scale applications at low flow rates.

First claim

What is claimed is:

1. A fluidic nozzle insert comprising:
a fluidic nozzle insert structure having a width (W) less than or equal to about 7.5 mm and length (L) less than or equal to about 8 mm; and
a fluidic oscillator with a mushroom shaped geometry having a compact curved, bottom wall radius (W C ) in the range of about 0.5 mm to about 2 mm, wherein the bottom wall radius is positioned within an interaction region and at least partially defines at least one power nozzle for projecting a fluid jet into the interaction region;
wherein an edge block is defined having an edge block length (T L ) that ranges with respect to a throat width (T W ) anywhere from 0 to about 0.8 times the throat width (T W ), wherein a width of the interaction region (I W ) is about 5 to about 10 times a power nozzle width (P W ), wherein a height of the interaction region (I H ) is about 4 to about 8 times the power nozzle width (P W ), and wherein a throat offset (T O ) is within the range of about 0.05 to about 0.3 times the height of the interaction region (I H ).

2. The fluidic nozzle insert of claim 1 , further comprising at least one source of fluid under pressure, at least a pair of power nozzles (PN 1 , PN 2 ) connected to the at least one source of fluid under pressure for projecting at least a pair of fluid jets into the interaction region, and at least one outlet orifice from the interaction region for issuing a pulsating or oscillating jet of fluid to a point of utilization or ambient, wherein a single feed manifold is connected to power nozzles (PN 1 , PN 2 ).

3. The fluidic nozzle insert of claim 1 , wherein the shape of a single feed manifold forms one of the walls defining a flat top interaction or oscillation chamber, wherein the length of the fluidic nozzle insert structure is matched to fit existing housings, and wherein the nozzle assembly has offsets which produce yaw angles in a liquid spray fan angle to the left or right depending on the direction desired.

4. The fluidic nozzle insert of claim 1 , wherein an outlet is off axis and wherein the outlet is aligned off of a central axis of the symmetry which is coaxial with a central spray axis by a fraction to the left or right to move the leftward or rightward yaw angles in the spray, and wherein the outlet may be offset along a longitudinal axis by an amount to produce a yaw angle of predetermined degree to the left or right depending on what is desired.

5. The fluidic nozzle insert of claim 1 , wherein, wherein the edge block length (T L ) is defined with an included angle in the range of about 10° to about 30° for wall segments having a length T L =(0.0 to 0.8)·T w , where Tw represents the throat width.

6. The fluidic nozzle insert of claim 1 , wherein the width of the fluidic nozzle insert structure is less than or equal to about 7 mm and the length is less than or equal to about 7.5 mm.

7. The fluidic nozzle insert of claim 1 , wherein the width of the fluidic nozzle insert structure is less than or equal to about 6.5 mm and the length is less than or equal to about 7 mm.

8. The fluidic nozzle insert of claim 1 , wherein the width of the fluidic nozzle insert structure is less than or equal to about 6 mm and the length is less than or equal to about 6.5 mm.

9. The fluidic nozzle insert of claim 1 , wherein the width of the fluidic nozzle insert structure is less than or equal to about 5.5 mm and the length is less than or equal to about 6 mm.

10. The fluidic nozzle insert of claim 1 , wherein the width of the fluidic nozzle insert structure is less than or equal to about 5 mm and the length is less than or equal to about 5.5 mm.

11. A fluidic nozzle assembly comprising:
a fluidic nozzle insert structure;
a nozzle post, wherein the nozzle post is designed to be mountable;
a raised fluidic nozzle insert receptacle, wherein the nozzle insert receptacle is designed to receive at least one fluidic nozzle insert in at least one cavity formed therein; and
a nozzle body, wherein the nozzle body is located between and connects both the nozzle post and the a raised fluidic nozzle insert receptacle,
wherein the fluidic nozzle insert comprises:
the fluidic nozzle insert structure having a width (W) less than or equal to about 7.5 mm and length (L) less than or equal to about 8 mm; and
a fluidic oscillator with a mushroom shaped geometry having a compact curved, bottom wall radius (W C ) in the range of about 0.5 mm to about 2 mm, wherein the bottom wall radius is positioned within an interaction region and at least partially defines at least one power nozzle for projecting a fluid jet into the interaction region;
wherein an edge block is defined having an edge block length (T L ) that ranges with respect to a throat width (T W ) anywhere from 0 to about 0.8 times the throat width (T W ), wherein a width of the interaction region (I W ) is about 5 to about 10 times a power nozzle width (P W ), wherein a height of the interaction region (I H ) is about 4 to about 8 times the power nozzle width (P W ), and wherein a throat offset (T O ) is within the range of about 0.05 to about 0.3 times the height of the interaction region (I H ).

12. The fluidic nozzle assembly of claim 11 , further comprising at least one source of fluid under pressure, at least a pair of power nozzles (PN 1 , PN 2 ) connected to the at least one source of fluid under pressure for projecting at least a pair of fluid jets into the interaction region, and at least one outlet orifice from the interaction region for issuing a pulsating or oscillating jet of fluid to a point of utilization or ambient, wherein a single feed manifold is connected to power nozzles (PN 1 , PN 2 ).

13. The fluidic nozzle assembly of claim 11 , wherein the shape of a power nozzle one of the walls of defining a flat top interaction or oscillation chamber, wherein the length of the fluidic nozzle insert structure is matched to fit existing housings, and wherein the nozzle assembly has offsets which produce yaw angles in a liquid spray fan angle to the left or right depending on the direction desired.

14. The fluidic nozzle assembly of claim 11 , wherein an outlet is off axis and wherein the outlet is aligned off of a central axis of the symmetry which is coaxial with a central spray axis by a fraction to the left or right to move the leftward or rightward yaw angles in the spray, and wherein the outlet may be offset along a longitudinal axis by an amount to produce a yaw angle of predetermined degree to the left or right depending on what is desired.

15. The fluidic nozzle assembly of claim 11 , wherein, wherein the edge block length (T L ) is defined with an included angle in the range of about 10° to about 30° for wall segments having a length T L =(0.0 to 0.8)·T w , where Tw represents the throat width.

16. The fluidic nozzle assembly of claim 11 , wherein the fluidic nozzle insert structure has a width (W) less than or equal to about 7 mm and length (L) less than or equal to about 7.5 mm.

17. The fluidic nozzle assembly of claim 11 , wherein the fluidic nozzle insert structure has a width (W) less than or equal to about 6.5 mm and length (L) less than or equal to about 7 mm.

18. The fluidic nozzle assembly of claim 11 , wherein the fluidic nozzle insert structure has a width (W) less than or equal to about 6 mm and length (L) less than or equal to about 6.5 mm.

19. The fluidic nozzle assembly of claim 11 , wherein the fluidic nozzle insert structure has a width (W) less than or equal to about 5.5 mm and length (L) less than or equal to about 6 mm.

Assignees

• Dlhbowles Inc

Inventors

• Han Edward
• Gopalan Shridhar
• Zhao Chunling

Classifications

• B05B1/08 Primary

  of pulsating nature, e.g. delivering liquid in successive separate quantities · CPC title

• B60S1/56

  specially adapted for cleaning other parts or devices than front windows or windscreens {(rear-view mirror arrangements mounted on vehicle exterior including cleaning devices B60R1/0602)} · CPC title

• B60S1/52

  Arrangement of nozzles; {Liquid spreading means}(nozzles per se B05B) · CPC title

• B60R2300/802

  for monitoring and displaying vehicle exterior blind spot views · CPC title

• B05B1/00 Primary

  Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means (B05B3/00, B05B5/00, B05B7/00 take precedence; devices for applying liquids or other fluent materials to surfaces by contact B05C; nozzles for ink-jet printing mechanisms B41J2/135; nozzles for liquid-dispensing, e.g. in vehicle service stations, B67D7/42) · CPC title