JP2021511953A - Small spray nozzle assembly and method for low temperature and low flow rate - Google Patents

Abstract

Low flow small spray head designs for cleaning applications include small spray nozzle heads with a diameter of about 5 mm or less for unidirectional spray nozzles and about 8 mm or less for nozzles with multiple sprays. The washer fluid is supplied from the bottom of the nozzle along the flow axis and splits into two streams via two power nozzles or inlets. At this time, the flow is rotated by 90 ° to become opposing jets that collide with each other in the interaction region. The two straight facing jets create a uniform streamline that merges at the nozzle throat into a uniform spray fan. The spray fan is on a plane perpendicular to the axis of the cylindrical nozzle head. According to this fluid circuit design, it is possible to operate a small size low flow velocity nozzle consistently at a low flow velocity by using 50% ethanol at a low temperature. According to this nozzle design, it is possible to generate two or more differently oriented spray fans from a single nozzle. [Selection diagram] Fig. 3

Description

Cross-reference to related applications This application claims the priority and interests of US Provisional Application Nos. 62 / 620,826 entitled "COLD WEATHER LOW FLOW MINIATURESPRAY NOZZLE ASSEMBLY AND METHOD" filed on January 23, 2018. As a matter of fact, this US provisional application is incorporated herein by reference in its entirety. This application is also a partial continuation of US Practical Patent Application No. 15 / 759,242 entitled "LOW-FLOW MINIATURE FLUIDICSPRAY NOZZLE ASSEMBLY AND METHO" filed on March 12, 2018. The application is of International Application No. PCT / US2017 / 62044 filed on November 16, 2017, claiming priority over US Provisional Application No. 62 / 423,016 filed on November 16, 2016. This is a domestic stage transition application.

This application is also related to the next patent application commonly owned by the applicant. That is, the PCT application entitled "Micro-sized Structure and Construction Method for Fluidic Oscillator Wash Nozzle", PCT application No. PCT / US16 / 57762 (currently International Publication No. WO2017 / 070246), and the PCT application entitled "Compact Split-lip Shear Washer Nozzle". PCT / US15 / 45429 (currently WO 2016/025930) and "" Integrated automotive system, compact, low profile nozzle assembly, compact fluidic circuit and remote control method for cleaning wide-angle image sensor's exterior surface " U.S. Patent Application No. 15 / 303,329 (currently U.S. Application Publication No. US2017 / 0036650). All of these disclosures are incorporated herein by reference.

Fields of Disclosure The present disclosure relates to very small, i.e., small spray nozzle assemblies, especially to small automotive washer nozzles for cleaning external surfaces such as external camera lens surfaces.

Fluidic washer nozzles are well known for their high efficiency (wide effective reach, high speed and low flow rate) spraying performance. However, the main limitation of fluidic nozzles is that the package size must be large enough (for example, most fluid circuits require at least 6 mm from the supply port to the outlet).

In some application cases, package size is a major issue due to the very limited space available. Jet spray nozzles have been commonly used in such application cases. Due to the narrow spray pattern, jet spray nozzles require a relatively high flow rate or a relatively long duration to clean up the surface of the glass or external lens. Jet nozzle spray nozzles have a smaller package size than fluidic nozzles, but do not have an effective spray pattern.

Some shear nozzles are made to produce a spray useful for cleaning and may be made adjustable using ball inserts in the nozzle housing, but size constraints remain a problem. .. Automotive designers want a very small nozzle assembly for automotive washer nozzles, but at the same time they want a uniform spray distribution. Automotive OEMs also want very economical and versatile nozzles. For example, external trim assemblies often combine many features such as CHMSL light assemblies. The CHMSL light assembly may include other features such as an external camera, but cleaning the lens of such a camera is a problem if the designer's vision of external trim is to be maintained.

Shear nozzles are sometimes used in small package size applications, although they perform well when the spray fan is in a geometric arrangement aligned with the axis of the supply hole. , If the spray fan is geometrically arranged perpendicular to the axis of the supply hole, it will not perform well. Other issues include spray aiming and mold complications, which are major constraints on design proposals including shear nozzles, as well as washer fluid spraying performance when spraying high viscosity cold liquids. It becomes. 1A-1G show prior art in the field of vehicle window cleaning systems and camera cleaning systems and one of the applicant's conventional small washer nozzle members 100 (references incorporated above). From).

Spraying performance at low temperatures is another difficult issue, but solving the problem of low temperature washer fluid spray generation in small nozzle assemblies is a highly desirable objective, especially for application cases of washer nozzles for in-vehicle cameras. Is. Under cold conditions, good spray reach on the camera lens of the vehicle is very important to remove dirt, ice and salt stains from the surface of the camera lens and similar sensors.

Therefore, there is a need for a very small lens washer nozzle configuration and cleaning method for automotive cameras that is practical, economical, easy to manufacture.

Overview Therefore, one object of the present disclosure is to provide a new way of incorporating the desired spray orientation function of low flow rate and high viscosity at low temperature into a very small (eg, 5 mm diameter) nozzle assembly spray head. Is to overcome the difficulties of.

According to the present disclosure, new small (eg, 5 mm diameter) shear nozzles are optimized to provide the desired spray from the sides of the small spray head. The geometry of the shear nozzles of the present disclosure produces a uniform spray fan perpendicular to the axis of the feed hole when the washer fluid is at low flow rates, while achieving excellent cold performance and easy manufacturability. .. In addition, this nozzle design allows one single nozzle to spray two fans in different orientations.

The low flow small spray head design for cleaning applications is particularly suitable for automatic cleaning application of camera lenses, with unidirectional spray nozzles having a diameter of about 5 mm or less and having multiple sprays. The case includes a small spray nozzle head having a diameter of about 8 mm or less. The washer fluid is supplied from the bottom of the nozzle housing along the flow axis of the vertical internal lumen, after which the pressurized fluid splits into two streams. These two streams are fed to the two power nozzle inlets, where the streams are rotated 90 ° into two jets facing each other within the region of interaction. The two straight facing jets create a uniform streamline that merges at the nozzle throat into a uniform spray fan on a plane perpendicular to the axis of the cylindrical nozzle head. According to this fluid circuit design, small size low flow nozzles are consistently low flow (eg, about 25 CP) using 50% ethanol at various temperatures, including low temperatures (ie, about -4 ° F or less). In the case of viscosity, it is possible to operate at a flow velocity of about 150 mL / min to about 300 mL / min at 25 psi, or about 250 mL / min at 25 psi or higher. According to this nozzle design, it is possible to generate two or more differently oriented spray fans from one single nozzle (eg, spray fans in opposite directions).

The nozzle assembly method of the present disclosure provides a new method for assembling a 5 mm diameter spray nozzle with a variable spray fan in a two-part nozzle assembly. The spray fan angle may be selected to be in the range of about 15 ° to about 70 °. The spray aiming angle may be selected to be in the range of about −15 ° to about + 15 °. This system works well at a washer fluid flow rate of about 200 mL / min to about 600 mL / min at 25 psi. The nozzle assemblies and methods of the present disclosure have low flow rates (eg, for a viscosity of about 25 CP, a flow rate of about 150 mL / min to about 300 mL / min at 25 psi, or a flow rate of about 250 mL / min at 25 psi or higher. ) To provide a lens cleaning system that can operate effectively. The spray nozzle works very well with a highly viscous washer fluid (eg, 50% ethanol) at a variety of temperatures, including low temperatures (ie, about -4 ° F or less).

The nozzle assemblies and methods of the present disclosure include a two-part spray nozzle assembly in which both the housing member and the insert member are economically viable for rough mass production. The nozzle assemblies and methods of the present disclosure may be implemented to have one nozzle spray or to have two or more spray fans of various orientations. In a multi-spray embodiment, one nozzle assembly produces two separate spray fans that are divergent, i.e., aimed along a spray axis that points in opposite directions, so that they are oriented in different directions. It may be configured to clean the surface (eg, a camera lens).

The above and additional objectives, features and advantages of the present disclosure will become apparent when considering the following detailed description of the particular embodiment, especially in conjunction with the accompanying drawings. In the accompanying drawings, similar reference numerals in the various figures are used to point to similar components.

FIG. 5 shows a vehicle equipped with a support camera system as disclosed in US Pat. No. 7,965,336. FIG. 5 shows a vehicle equipped with a support camera system as disclosed in US Pat. No. 7,965,336. FIG. 5 is a schematic diagram showing an automotive imaging system with a nozzle assembly configured to clean the surface of the external objective lens of the imaging system according to the prior art. It is a figure which shows the small split lip shear washer nozzle for use in the application example of an automobile by the prior art. It is a figure which shows the small split lip shear washer nozzle for use in the application example of an automobile by the prior art. It is a figure which shows the small split lip shear washer nozzle for use in the application example of an automobile by the prior art. It is a figure which shows the small split lip shear washer nozzle for use in the application example of an automobile by the prior art. FIG. 3 is a spray nozzle according to an embodiment of the present disclosure, and a side sectional view taken along the line AA of FIG. 2A. FIG. 2A is a plan sectional view taken along the line BB of FIG. 2A, showing an interaction region of a spray nozzle and an insert member separated from a housing according to an embodiment of the present disclosure. FIG. 3A is an enlarged plan sectional view taken along line BB of FIG. 2A according to an embodiment of the present disclosure. FIG. 3B is an enlarged cross-sectional view taken along the line AA of FIG. 2A according to an embodiment of the present disclosure. FIG. 5 is a photograph showing a plan view of a spray nozzle according to an embodiment of the present disclosure, which operates at room temperature and has a nozzle flow rate of about 250 ml / min at 25 psi. It is a photograph which shows the side view of the spray nozzle by one Embodiment of this disclosure which operates at room temperature and has a nozzle flow rate of about 250 ml / min at 25 psi. FIG. 5 is a photograph showing a plan view of a spray nozzle according to an embodiment of the present disclosure, which operates at about -4 degrees Fahrenheit, has a nozzle flow rate of about 250 ml / min at 25 psi, and sprays a 50% ethanol solution. FIG. 5 is a perspective view of a spray nozzle according to another embodiment of the present disclosure, where the nozzle of FIG. 5A has the ability to produce two or more spray fans. FIG. 5A is a front view of the nozzle assembly of FIG. 5A. FIG. 5A is a rear view of the nozzle assembly of FIG. 5A. FIG. 3 is a cross-sectional perspective view of an insert for a spray nozzle according to another embodiment of the present disclosure. FIG. 5 is a cross-sectional view of the opposite side of the spray nozzle insert according to another embodiment of the present disclosure. It is a top perspective view of the insert for a spray nozzle. It is sectional drawing which shows one Embodiment of the spray nozzle by this disclosure. It is a figure which shows the multi-spray nozzle assembly by one Embodiment of this disclosure in operation. It is a figure which shows the multi-spray nozzle assembly by one Embodiment of this disclosure in operation. It is a figure which shows the multi-spray nozzle assembly by one Embodiment of this disclosure in operation. It is a perspective view of the nozzle assembly by one Embodiment of this disclosure.

Detailed Description of Disclosure Next, exemplary embodiments of the present disclosure will be referred to in detail. An example of this disclosure is shown in the accompanying drawings. It should be understood that other embodiments may be used and structural and functional changes may be made without departing from the respective scope of the present disclosure. Moreover, features of various embodiments may be combined or modified without departing from the scope of the present disclosure. Accordingly, the following description is presented by way of example only and can be made to the exemplary embodiments and nevertheless attempts to limit the various alternatives and modifications within the ideas and scope of the present disclosure. It's not a thing.

As used herein, the terms "example" and "exemplary" mean an example or an example. The term "example" or "exemplary" does not indicate an important or preferred aspect or embodiment. The word "or" is intended to be inclusive rather than exclusive, unless the context suggests otherwise. As an example, the phrase "A uses B or C" includes any comprehensive permutation (eg, uses B, A uses C, or A uses both B and C). To use) is included.

Similar reference codes are used throughout the figure. Therefore, even if the functionality of the assembly is the same in all figures, some figures show only the selected elements. Similarly, certain aspects of the present disclosure are shown in those figures, but other aspects and arrangements are possible, as described below. Next, with reference to the detailed description of the nozzle assembly and the small spray nozzle member of the present disclosure, the accompanying figures (FIGS. 2A-10) show various specific embodiments of the present disclosure.

As an example, in a specific exemplary embodiment of the spray nozzle system and method of the present disclosure, a very small nozzle assembly 200 is exemplified, wherein such a system is one or more aimed sprays. Generate a fan or pattern. The small (eg, 5 mm diameter) shear nozzle assembly 200 of the present disclosure is optimized to provide the desired spray from the side of a small spray head. In one embodiment, the spray heads of the present disclosure have any suitable height, eg, in one non-limiting embodiment, including a height of about 4.6 mm or a height of about 3 mm. It has a height of 5 mm or less. The geometry of the shear nozzles of the present disclosure provides a uniform spray fan along the spray axis at low flow rates of washer fluid, while achieving excellent low temperature performance and easy manufacturability (see FIGS. 4A-4C). Is generated in the spray fan plane perpendicular to the central lumen axis of the fluid inlet or supply hole (see FIGS. 3A-3C). In an alternative embodiment, as shown in FIGS. 5A-8C, the nozzle design according to the other embodiments of the present disclosure is a multi-spray nozzle assembly capable of spraying two differently oriented fans from one single nozzle. It is disclosed as being configurable as 300. A low flow small spray head design for cleaning (particularly, cleaning camera lenses) applications includes, in one embodiment, a small spray nozzle head 200 having a diameter of about 5 mm or less. The washer fluid (or any other fluid, liquid, or even air) is fed from the bottom of the nozzle 200 along the tube center flow axis 202 of the nozzle assembly, after which the fluid flows into the two streams 204a, 204b. Divide. Next, the flows 204a and 204b are supplied to the first power nozzle 220a and the second power nozzle 220b. These power nozzles, ie inlets 220a and 220b, define a lumen or communication path that rotates the flow by 90 °. This creates two jets that face each other, that is, face each other. These streams merge with each other within the interaction region 230, i.e. collide with the other party. As can be best seen from the two figures of FIGS. 3 (A) and 3 (B), these two colliding, or straight facing jets, produce uniform streamlines that are nozzle throats or outlet orifices. It merges at 240 to become a uniform spray fan 208. The spray fan 208 is projected along the central spray axis in a plane perpendicular to the central flow axis of the inlet lumen of the cylindrical nozzle head. In the shear nozzle assembly according to claim 1, the position of the power nozzle with respect to the interaction region includes the upper clearance dimension and the lower clearance dimension, and the upper clearance dimension is larger than the lower clearance dimension. The lateral throat of the insert member is partially defined by a first side wall 210A, a second side wall 210B, a floor surface 212A and a roof surface 212B. The first side wall and the second side wall face each other and are substantially flat. Further, the floor surface and the roof surface may face each other and may be substantially flat. The nozzle housing may include a dome-shaped tip having a diameter size of about 5.6 mm.

According to this fluid circuit design, a small size low flow nozzle using a liquid or aqueous system containing up to about 50% ethanol at various temperatures, including low temperatures (ie, about -4 ° F or less). Consistently operates at a low flow rate (for example, at a viscosity of about 1 to 25 CP, at a flow rate of about 150 mL / min to about 300 mL / min at 25 psi, or at a flow rate of about 250 mL / min at 25 psi or higher). It becomes possible to make it. By modifying the configuration of the nozzle assembly 200, it works on the same principle and from one single nozzle assembly (see nozzle 300 as shown in FIGS. 5A-8C) two or more differently oriented spray fans (see FIGS. 5A-8C). For example, it is possible to obtain a two-spray embodiment (see, eg, nozzle assembly 300) capable of producing fans that are sprayed in opposite directions.

The nozzle assembly method of the present disclosure provides a novel method for assembling a small (eg, about 5 mm diameter) spray nozzle having a variable spray fan in a two-part nozzle assembly. The spray fan angle may be selected to be in the range of about 15 ° to about 70 °. The spray aiming angle may be selected to be in the range of about −15 ° to about + 15 °. In one embodiment, the system of the present disclosure works well at a washer fluid flow rate of about 200 mL / min to about 600 mL / min at 25 psi. The nozzle assemblies and methods of the present disclosure have low flow rates (eg, with a viscosity of about 25 CP, a flow rate of about 150 mL / min to about 300 mL / min at 25 psi, or a flow rate of about 250 mL / min at 25 psi or higher). To provide a lens cleaning system that can operate effectively in. The spray nozzle works very well under low temperature (ie, about -4 ° F or less) conditions with a highly viscous washer fluid (eg, a liquid containing up to about 50% ethanol).

In the nozzle assembly and method of the present disclosure, both the housing member 206 and the insert member 216 (see FIG. 2A) are for coarse mass production (eg, molding from plastic materials, 3D printing, injection molding, etc.). Includes a two-part spray nozzle assembly 200 that is economically viable. The nozzle assemblies and methods of the present disclosure may be implemented to have one nozzle spray or to have two or more spray fans of various orientations. As shown in FIGS. 8A-8C, the nozzle assembly 300 produces divergent, i.e., separate first and second spray fans aimed along the oppositely oriented spray axis. May be configured to clean the surfaces of the first and second camera lenses in individual and different orientations.

Returning to FIGS. 3 (A) and 3 (B), during operation, the two flows from the first and second inlets, i.e., the power nozzles 220a and 220b, enter the interaction region 230 from opposite directions. Collisions, or violently colliding flows, form a flat fan-shaped spray 208 by creating a shear streamline that flows distally toward the outlet orifice or throat 240 along the central spray axis of the interaction area. (As shown in FIGS. 4A-4C). As best seen from FIG. 3 (A), the outlet throat 240 forms the desired spray fan shape, reducing the failure of such small nozzles when operating in cold ambient conditions. To do. The spray is preferably a jet that is not subject to the flow action produced by the operation of the outlet throat 240. In one embodiment, the nozzle assembly 200 of the present disclosure has a fan inlet feed fluid with a low flow rate (eg, for a maximum viscosity of about 25 CP, a flow rate of about 150 mL / min to about 300 mL / min at 25 psi, or A sufficient spray fan can be reliably generated when supplied at a flow rate of about 250 mL / min at 25 psi or higher. In addition, the spray nozzle 200 contains a highly viscous fluid / aqueous liquid (eg, about 50 percent ethanol and about 50 percent water) even under low temperature conditions below about -4 ° F (see, eg, FIG. 3). It works very well with washer fluid).

Another advantage of the nozzles and methods of the present disclosure is that the insert member (eg, 216) is suitable for injection molding and even for 3D printing and is resistant to manufacture, assembly, retention and sealing. Is. For each power nozzle 220a and / or 220b, the lumen cross-sectional area or inlet size is, in a non-limiting example, about 1 mm x about 0.4 mm. In this case, the width of the general interaction region is in the range of about 0.4 mm to about 0.6 mm. The outlet throat or outlet orifice 240 (sides shown in FIGS. 2B and 3B) is axially aligned with the side opening 242 of the housing member 206 and sprays through the side opening 242.

In one embodiment, the typical outlet throat size is about 0.5 mm x about 1 mm. The lumen area or inlet size of the power nozzle is larger than the outlet throat to reduce restrictions and turbulence on the flow supplied from the lower opening or housing inlet orifice (eg, to ease the flow). There is. To balance the upward vector of the feed stream within the interaction region 230 (as best seen from the two figures in FIG. 2B), the upper clearance (indicated by Δ1) is indicated by the lower clearance (indicated by Δ2). Is larger than). This inlet supply condition helps maintain a stable spray.

In one embodiment, the spray fan can be adjusted for different cleaning applications by adjusting the ratio of the outlet throat region 240 to the outlet throat 242. The distance between the inlet throat and the exit throat also affects the spray fan. The spray aiming angle can also be changed by creating an offset between the outlet throat 242 and the outlet throat to provide a downward draft on the top or bottom of the outlet (see, eg, FIG. 7). The spray thickness increases as the outlet throat is radially expanded by the drafted upper / lower exit surfaces (see, eg, FIG. 7).

As shown in FIGS. 5A-8C (these figures show a multi-spray nozzle assembly 300 with housing 306 and insert 316), according to the circuit design of the present disclosure, differently oriented lenses and other To clean the surface, it is possible to generate one or more separate spray fans with divergent spray shafts, i.e., spray shafts pointing in opposite directions, and create one single nozzle assembly to aim. .. In this embodiment, there is no power nozzle, but there is an internal lumen 320 extending into the insert 316. According to the internal lumen 320, the fluid can flow through the internal lumen 320 and flows separately into the first inlet lumen 322A and the second inlet lumen 322B along the central member 330. can do. The first inlet lumen 322A and the second inlet lumen 322B communicate directly with the interaction region 340. In particular, the areas of the first and second inlet cavities 322A and 322B are larger than the interaction region 340. The first outlet 350 and the second outlet 360 extend opposite to each other from the interaction region 340, and as shown in FIG. 7, the first outlet outlet 352 and the second outlet outlet It is configured to align with 362.

In the case of the exemplary embodiment shown in FIGS. 8A-8C, the spraying directions of the first spray from the first outlet 350 and the first outlet outlet 352 are aiming = 0 ° and rotation = 0 °. On the other hand, the spraying direction of the second spray from the second outlet 360 and the second outlet outlet 362 is aiming = −10 ° and rotation = 10 °. The angle of rotation of 10 ° is achieved by rotating the cavity with the slotted cross section of the interaction region along the second outlet 360 (see FIGS. 6A, 6B, 6C). The -10 ° aiming angle is achieved by the offset between the second outlet 360 and the second outlet outlet 362 in the housing 306 and the downward draft in the bottom outlet floor 370. Both the design of housings 206, 306 and the design of inserts 216, 316 are suitable for molding. The separation angle (between the two spray fans) or angle between the first spray shaft and the second spray shaft of the nozzles shown in FIGS. 5A to 8C is 180 °. This separation angle may be about 30 °, about 45 °, about 90 °, or any other angle, depending on the package size of the nozzle. Applicants' development studies on nozzle assemblies of the present disclosure (eg, 200, 300) have shown that the nozzles of the present disclosure also work with oil, air or other fluids.

Although various embodiments of the present disclosure are set forth in the accompanying drawings and described in the detailed description above, the present disclosure is not limited to the disclosed embodiments and is described herein. The described disclosure is capable of numerous rearrangements, modifications, and substitutions without departing from the claims. The following claims are intended to include all amendments and changes, as long as they are within the claims or their equivalents.

Accordingly, this specification is intended to include all such modifications, modifications, and modifications within the ideas and scope of the appended claims. Further, as long as the word "contains" is used in either the detailed description or the claims, such words are used when the word "contains" is used as a transition word in the claims. It is intended to be inclusive, as is the interpretation of the word "contains".

Claims (20)

A low flow fluid saving shear nozzle assembly
An insert member having two opposing power nozzles communicating with a lateral throat forming an interaction region, wherein the lateral throat is on the opposite side of the end where the two opposing power nozzles intersect the lateral throat. With an insert member having at least one outlet orifice or outlet throat located at the end,
Includes a nozzle housing that surrounds the internal volume that receives the insert member.
The at least two opposing power nozzles are defined by the insert member and the nozzle housing, the at least two opposing power nozzles receive a pressurized fluid, and the pressurized fluid is the first and second. It flows into the power nozzle, which produces a first fluid flow and a second fluid flow, which the first and second power nozzles aim at at least a region of interaction defined by the insert member. Is determined,
A lateral side wall opening communicates with the interaction region of the insert member and defines a lateral throat, which aligns with the lateral opening defined on the side wall of the nozzle housing. A shear nozzle assembly that produces, ejects, or enables a uniform spray fan on a plane approximately perpendicular to the axis of the nozzle housing and radiates from the interaction area. The shear nozzle assembly according to claim 1, wherein the cross-sectional shape of the lateral side wall opening of the insert member forms a part of the nozzle outlet orifice. The shear nozzle according to claim 2, wherein the nozzle outlet orifice is substantially rectangular, is defined in the lateral throat by a side wall in the insert member, and the side wall projects upward from a flat floor surface. assembly. The lateral side wall opening is formed within the insert member and is aligned with the lateral opening of the housing along a spray axis, the spray axis being approximately perpendicular to the inlet axis of the nozzle housing. The insert member and the nozzle housing extend along the inlet shaft. The shear nozzle assembly according to claim 1. The pressurized fluid is introduced into at least one fluid passage adjacent to the distal end of the insert member, and the first and second power nozzles and the interaction area are adjacent to the proximal end of the insert member. The shear nozzle assembly according to claim 4, wherein the distal end and the proximal end are configured to be aligned along the inlet axis. The insert member defines a side wall feature that defines a filter post array for filtering pressurized fluids that flow into the internal volume of the housing, pass through the internal volume, and flow into the first and second power nozzles. The shear nozzle assembly according to claim 1. The shear nozzle assembly according to claim 1, wherein the insert member is received in a bottom opening of the nozzle housing and allows fluid to flow into the internal volume of the nozzle housing around the insert member. The shear nozzle assembly according to claim 1, wherein the position of the power nozzle with respect to the interaction region includes an upper clearance dimension and a lower clearance dimension, and the upper clearance dimension is larger than the lower clearance dimension. The shear nozzle assembly of claim 1, wherein the lateral throat of the insert member is partially defined by a first side wall, a second side wall, and a floor surface. The shear nozzle assembly according to claim 9, wherein the first side wall and the second side wall face each other and are substantially flat. The shear nozzle assembly of claim 1, wherein the nozzle housing comprises a dome-shaped tip having a diameter size of about 5.6 mm. The nozzle assembly includes a uniform spray fan with an aiming angle between about -10 degrees and about +10 degrees from the spray axis at low flow rates of about 150 mL / min to about 300 mL / min at 25 psi. The shear nozzle assembly according to claim 1, wherein the spray pattern can be ejected and spraying of a liquid having a viscosity of about 1 CP to about 25 CP can be reliably started. The shear nozzle assembly according to claim 1, wherein the feature defining the fluid passage is defined along the outer surface of the insert member and the inner surface of the nozzle housing. The insert member further includes a first lateral inlet and a second lateral inlet formed along the outer surface of the insert member, the first lateral inlet and the second lateral inlet. The shear nozzle assembly according to claim 1, which communicates with the first power nozzle and the second power nozzle of the insert member. A method of assembling a small shear nozzle assembly with a low flow rate.
A step of providing a nozzle housing surrounding the internal volume and a lateral opening along the side wall,
An elongated insert member having two opposing power nozzles communicating with a lateral throat forming an interaction region, the lateral throat opposite to the end of the two opposing power nozzles intersecting the lateral throat. A step of forming an insert member having at least one outlet orifice or outlet throat located at the end of the
The step of receiving the insert member within the internal volume of the nozzle housing and the fluid passage are defined by the insert member and the nozzle housing.
Includes a step of aligning the lateral throat of the insert member with the lateral opening of the nozzle housing.
The fluid passage communicates with a first power nozzle and a second power nozzle communicating with the interaction region, and ejects a uniform spray fan on a plane substantially perpendicular to the axis of the nozzle housing. A method of assembling a low flow small shear nozzle assembly that radiates from the interaction area. The low flow rate small shear according to claim 16, further comprising aligning the first power nozzle and the second power nozzle within the lateral throat of the member. How to assemble a spray nozzle assembly. A small, low flow fluid-saving shear nozzle assembly
An insert member having two opposing inlet lumens communicating with a lateral throat forming an interaction region, wherein the lateral throat having a first outlet and a second outlet intersects the lateral throat. An insert member that is located across the opposing inlet lumen,
A nozzle housing that surrounds the internal volume that receives the insert member,
An internal lumen formed in the insert member, which communicates with the first and second inlet lumens of the insert member.
A first outlet opening and a first outlet opening defined through the side wall of the nozzle housing and ejecting a uniform spray fan on a plane substantially perpendicular to the axis of the nozzle housing and radiating from the interaction area. Including 2 exit openings
Pressurized fluid flows into the first and second inlet lumens, the first fluid stream and the second fluid stream cross the interaction region defined by the insert member, and the first outlet. And exit from the second outlet on the opposite side and spray from the first outlet opening and the second outlet opening.
The shear nozzle assembly, wherein the first spray and the second spray are uniform spray fans on a plane substantially perpendicular to the axis of the nozzle housing. The shear nozzle assembly according to claim 17, wherein the first inlet lumen and the second inlet lumen have a larger area than the interaction region. The shear nozzle assembly according to claim 17, wherein the first inlet lumen, the second inlet lumen, and the interaction region are formed in the insert member. The shear nozzle assembly of claim 17, wherein the first spray has a different angle than the second spray.

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