Uniform cold performance reverse mushroom

Patent metadata

Field	Value
Publication number	US-11712707-B2
Application number	US-202017093048-A
Country	US
Kind code	B2
Filing date	Nov 9, 2020
Priority date	Nov 7, 2019
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

Provided is a compact sized low flow rate fluidic nozzle insert. The fluidic nozzle insert may include a fluidic oscillator chip on a front face having a flat-top interaction region, and a manifold on a back face, located opposite the front face, to house fluid. The fluidic nozzle insert may further include at least one feed having a u-shape connecting the front face and back face for the transport of fluid from the manifold, at least one power nozzle oriented toward the front face for directing fluid from the at least one feed to the interaction region of the fluidic oscillator chip, and a v-shaped outlet at the bottom of the interaction region defined by two flat walls for the passage of fluid from the interaction region to the outside of the fluidic nozzle insert in a fan pattern. The produced spray fan pattern may be uniform and fluid nozzle may work well with high viscosity fluids.

First claim

The invention claimed is:

1. A fluidic nozzle insert comprising:
a chip configured to receive a fluid along a back face of the chip and to emit the fluid in an oscillating fluid fan spray from an outlet on the front face of the chip, the chip including a fluidic oscillator geometry having only one unobstructed interaction region on the front face;
a manifold formed on the back face to receive fluid from a fluid source;
at least one feed in fluid communication through the chip between the back face and the front face to transport fluid from the manifold on the back face to the interaction region on the front face;
wherein the interaction region is bounded along its periphery by an outlet at a first edge of the front face, an upper wall positioned opposite the outlet, a pair of similarly shaped sidewalls each connected directly to the upper wall and each having inwardly protruding inflection points, a pair of straight inner walls having a first edge positioned adjacent to the inflection points and a second edge terminating at and defining the outlet, and at least one power nozzle provided for each feed, with each power nozzle directing fluid from a corresponding feed into the interaction region; and
wherein each power nozzle is positioned between an inflection point and the first edge of the straight inner wall and wherein the pair of straight inner walls are formed at an angle relative to one another.

2. The fluidic nozzle insert of claim 1 wherein the fluidic nozzle insert has a length that is approximately less than or equal to 4.65 mm and a width along the first edge that is approximately less than or equal to 5.02 mm.

3. The fluidic nozzle insert of claim 1 wherein a first power nozzle for communicating fluid received directly from a first feed and a second power nozzle for communicating fluid received directly from a second feed are provided on opposing sidewalls of the interaction region.

4. The fluidic nozzle insert of claim 3 further comprising a barrier positioned along the manifold on the back face, the barrier is positioned between the first feed and the second feed.

5. The fluidic nozzle insert of claim 1 wherein the fluidic oscillator geometry is symmetrical along a central axis.

6. The fluidic nozzle insert of claim 1 wherein the at least one feed is arranged a first distance from said first edge and wherein a throat is defined by a point at which each of the second edges of each straight inner wall are positioned closest together, said throat arranged a second distance from the first edge such that the second distance is greater than the first distance.

7. The fluidic nozzle insert of claim 5 wherein the at least one feed consists of a first feed and a second feed to transport fluid from the manifold to the interaction region;
wherein a first power nozzle is positioned opposite second power nozzle, with the first power nozzle in direct communication with the first feed and the second power nozzle in direct communication with the second feed; and
wherein the first power nozzle and the second power nozzle are angled symmetrically relative to the central axis .

8. The fluidic nozzle insert of claim 7 wherein the first and second inflection points protrude inwardly relative to a perimeter of the interaction region towards the central axis and wherein the central axis bisects the outlet and the upper wall.

9. The fluidic nozzle insert of claim 8 further comprising a first point in a first sidewall between the inflection point on the first sidewall and the upper wall and a second point in the opposing sidewall between the inflection point on the opposing sidewall and the second power nozzle and wherein the first point and the second point are located a position that is further away from the central axis than from the first and second inflection points, respectively.

10. The fluidic nozzle insert of claim 7 wherein the first feed includes a slightly tapered or narrowing pathway on the front face adjacent to the first power nozzle and the second feed includes a slightly tapered or narrowing pathway on the front face adjacent to the second power nozzle.

11. A fluidic nozzle insert formed on a substantially flat member comprising:
a first surface having a horizontally-oriented fluidic oscillator geometry having a reverse mushroom shaped interaction region;
a manifold region provided along an opposite second surface to receive fluid from a fluid source;
at least one vertical feed for the communication of fluid through a defined thickness of the insert from the opposite second surface to the first surface;
at least one power nozzle direct communication with the at least one vertical feed to transport fluid horizontally through the power nozzle and into the interaction region; and
an outlet forming a lower portion of the interaction region on a lower edge of the first surface, the lower portion positioned opposite an upper portion having a continuous reverse mushroom shaped wall, and wherein the outlet has a v-shape defined by two opposing flat walls to distribute an oscillating fluid fan spray from the interaction region, wherein each of the flat walls extends on a straight line away from the outlet to either the at least one power nozzle or the upper portion.

12. The fluidic nozzle insert of claim 11 wherein each power nozzle has a width of about 0.4 mm, the interaction region has a maximum width of about 3 mm, and the interaction region has a height along a central axis of about 2 mm.

13. The fluidic nozzle insert of claim 11 wherein a barrier forms part of the manifold region so as to separate a first feed and a second feed along the second surface.

14. The fluidic nozzle insert of claim 11 wherein the fluidic geometry is symmetrical along a central axis.

15. The fluidic nozzle insert of claim 11 further comprising a first feed and a second feed to transport fluid from the manifold to the interaction region; and
a first power nozzle and a second power nozzle positioned along the first surface, each in respective communication with the first and second feeds and each directing fluid flow along the first surface.

16. The fluidic nozzle insert of claim 15 further comprising a first inflection point and a second inflection point each respectively defining a portion of the first and second power nozzles and wherein the first and second inflection points protrude inwardly relative to the upper portion.

17. The fluidic nozzle insert of claim 16 further comprising a first point positioned between the first inflection point and the upper portion and a second point positioned between the second inflection point and the upper portion and wherein the first point and the second point are located further away from a central axis of the interaction region than the first and second inflection points.

18. The fluidic nozzle insert of claim 15 wherein the first feed is enclosed by first opposing walls on the first surface that have a slightly tapered or narrowing pathway from a first aperture defining a portion of the vertical feed to the first power nozzle and the second feed is enclosed by second opposing walls on the first that have a slightly tapered or narrowing pathway from a second aperture defining a portion of the vertical feed to the second power nozzle.

19. The fluidic nozzle insert of claim 15 wherein the first feed and the second feed are arranged a first distance from the lower edge and wherein the throat is arranged a second distance from the lower edge such that the second distance is greater than the first distance

Assignees

• Dlhbowles Inc

Inventors

• Zhao Chunling

Classifications

• B05B3/14 Primary

  with oscillating elements; with intermittent operation · CPC title

• B05B1/08 Primary

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

• B60S1/52

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