Two-fluid nozzle with arc-shaped opening

Abstract

This disclosure describes a two-fluid nozzle including a nozzle body. The nozzle body includes a first fluid nozzle head having a first fluid opening formed therein. The nozzle body includes a second fluid nozzle head including a second fluid opening formed therein. The first fluid nozzle head and the second fluid nozzle head are fluidly isolated from each other within the nozzle body. The first fluid opening and the second fluid opening are respectively arcuate and rectangular. The second fluid opening is positioned adjacent to the first fluid opening such that, when flow occurs, second fluid from the second fluid opening affects first fluid from the first fluid opening of a first tubular member.

Description

Background Technology

[0001] An atomizer is a device that transforms bulk fluid into a fine spray or mist of droplets. The size and shape of an atomizer can vary depending on the desired application and / or delivery system. Applications over the years have included delivering first-fluid hydrocarbon feedstocks in fluidized catalytic cracking processes, dispensing chemical pesticides, and applying surface coatings.

[0002] Atomizers are currently used in handheld pneumatic spray guns, which can be used, for example, in vehicle repair and body shops, to apply fluid coating media (such as primer, paint, and / or clear coat) to vehicle parts. Typically, the spray gun is made of solid metal or plastic and includes a platform and a nozzle assembly. The nozzle assembly includes a nozzle for dispensing fluid, one or more atomizing air outlets for atomizing the fluid as it leaves the nozzle, and two or more shaping air outlets for shaping the atomized fluid into a desired spray pattern. The spray gun contains a series of internal channels that distribute air from an air supply manifold in the platform to the atomizing air outlets and shaping air outlets in the nozzle assembly. Fluid atomization performed using this technique is sometimes referred to as air atomization, air spraying, air-assisted atomization, or blower atomization, and exemplary spray guns using such techniques are disclosed, for example, in WO 2018 / 104870 and... Figure 1 As shown in the image.

[0003] Atomizers can be used to atomize fluids in a fan-shaped spray pattern. U.S. Patent No. 7,793,859 describes a nozzle having two spaced-apart parallel slots for atomizing a hydrocarbon feed. The two parallel slots distribute the same atomized hydrocarbon feed (external mixing). The nozzle does not isolate the first and second fluids.

[0004] Two-fluid nozzles have been used to dispense fan-shaped spray patterns. These two-fluid nozzles exist in various configurations, but can consume excess of a second fluid (e.g., gas).

[0005] Internally mixed two-fluid nozzles can be used to reduce the consumption of the second fluid.

[0006] For example, U.S. Patent No. 3,635,400 and British Patent No. 636,397 describe a rectangular slot as an external opening for atomizing a liquid / gas mixture; however, the nozzle is configured as an internal mixing nozzle for two fluids, wherein the liquid and gas are discharged independently within the mixing chamber before exiting through the rectangular slot. This configuration can lead to backflow problems, depending on the liquid and gas supply channels and the relative pressure within the mixing chamber.

[0007] Externally mixed two-fluid nozzles do not have an internal mixing chamber. The first and second fluid flows merge externally within the nozzle. They typically combine two distinct gas channels into the spray nozzle to 1) assist in atomizing the first fluid and 2) shape the resulting spray pattern, respectively. The separate gas channels used for spray patterning conventionally include relatively "air horns" (e.g., capable of emitting high-speed gas jets). Figure 1 (116 in the text), the high-speed gas jet impacts the atomizing spray and causes it to spread in space. The air horn can consume a large amount of the second fluid.

[0008] For example, U.S. Patent Nos. 4,055,300 and 9,782,784 describe a rectangular or elliptical slit that serves as an outlet for discharging liquids and gases, but uses an air horn with multiple passages to control the resulting shape of the spray pattern. This arrangement can lead to excessive consumption of the second fluid. Furthermore, there are no two arc-shaped nozzles.

[0009] U.S. Patent No. 4,273,287 describes a nozzle having an elliptical slot for distributing a first fluid while an offset orifice distributes a second fluid. In addition to being shaped by the second fluid, the first fluid itself is pressurized. Summary of the Invention

[0010] This disclosure relates to various aspects of a two-fluid nozzle. The two-fluid nozzle may include a nozzle body. The nozzle body includes a first fluid nozzle head having a first fluid opening formed therein. The first fluid opening is configured to provide a first fluid from a first fluid passage inlet via a first fluid passage. The nozzle body includes a second fluid nozzle head including a second fluid opening formed therein. The second fluid opening is configured to provide a second fluid from a second fluid passage inlet via a second fluid passage. The first fluid passage and the second fluid passage are at least partially within the nozzle body and are fluidly isolated from each other within the nozzle body. The first fluid opening and the second fluid opening are respectively arcuate and rectangular. The second fluid opening is positioned adjacent to the first fluid opening such that, when flow occurs, the second fluid from the second fluid opening affects the first fluid from the first fluid opening of a first tubular member.

[0011] In at least one embodiment, the two-fluid nozzle is an externally mixing two-fluid nozzle. In at least one embodiment, the farthest portion of the second fluid nozzle head does not extend beyond the farthest portion of the first fluid nozzle head.

[0012] In at least one embodiment, the nozzle body includes an outer surface that is not configured to contact the first fluid or the second fluid. In at least one embodiment, the outer surface faces the surrounding environment.

[0013] In at least one embodiment, the first fluid nozzle head is fan-shaped, with blade cavities formed therein. In at least one embodiment, the first fluid opening is disposed in the longitudinal plane of the two fluid nozzles. In at least one embodiment, the first fluid nozzle head includes an arcuate edge that partially defines the height dimension of the outer arcuate edge of the first fluid opening. In at least one embodiment, the height dimension of the outer arcuate edge is greater than the height dimension of the protrusion near the first fluid passage. In at least one embodiment, the first fluid nozzle head has a rectangular cross-sectional area truncated in the frontal plane of the two fluid nozzles. In at least one embodiment, the first fluid opening has an outer arcuate edge height dimension defined in the longitudinal plane of the two fluid nozzles, which is greater than the outer arcuate edge width dimension defined in the transverse plane of the two fluid nozzles.

[0014] In at least one embodiment, the first fluid nozzle head is fluidly connected to the first fluid passage inlet via the first tubular member, and the second fluid nozzle head is fluidly connected to the second fluid passage inlet via the second tubular member. In at least one embodiment, the first tubular member or the second tubular member has a non-uniform cross-section over the entire longitudinal plane of the two fluid nozzles. In at least one embodiment, the second tubular member includes a tapered portion tapering into the second fluid nozzle head, wherein the inner surface of the tapered portion forms a chamber. In at least one embodiment, the dome-shaped portion has a dome surface, and the second fluid opening is defined by an inner edge of a dome including a plurality of inner edge portions. In at least one embodiment, the second fluid opening includes a plurality of second fluid opening portions, each second fluid opening portion being defined by a gap between an inner edge portion of the plurality of inner edge portions of the dome and an adjacent arcuate edge portion of the plurality of arcuate edge portions. In at least one embodiment, a large portion of the arcuate edge follows the contour of the dome-shaped portion. In at least one embodiment, the second fluid opening is formed within the dome-shaped portion, and the first fluid opening is located within the second fluid opening. In at least one embodiment, the first fluid opening is parallel to the second fluid opening or at least two portions of the second fluid opening.

[0015] In at least one embodiment, at least a portion of the first fluid passage is coaxial with the second fluid passage.

[0016] In at least one embodiment, the first fluid passage and the second fluid passage are integrally formed. In at least one embodiment, the arcuate edge is formed of metal and the second fluid nozzle head is formed of polymer, the second fluid nozzle head being overmolded over the arcuate edge. In at least one embodiment, the first fluid nozzle head is formed of polymer and the second fluid nozzle head is formed of metal.

[0017] In at least one embodiment, the first fluid opening establishes a first longitudinal plane; wherein the second fluid opening establishes a second longitudinal plane, the second longitudinal plane being parallel to the first longitudinal plane.

[0018] In at least one embodiment, the second fluid opening at least partially surrounds the first fluid opening. In at least one embodiment, the second fluid opening completely surrounds the first fluid opening. In at least one embodiment, the second fluid opening is formed in the dome surface of the dome-shaped portion by an inner edge of a dome having a periphery, the arcuate edge being spaced apart from the periphery on at least two sides. In at least one embodiment, the arcuate edge of the first tubular member is spaced apart from the periphery on all sides.

[0019] In at least one embodiment, the second fluid nozzle head is divided into two or more sections.

[0020] In at least one embodiment, the first fluid nozzle head is divided into two or more sections to create multiple openings.

[0021] In at least one embodiment, the first fluid nozzle head includes a baffle wall disposed parallel to the transverse plane. In at least one embodiment, the baffle wall and the arcuate edge portion define an opening.

[0022] In at least one embodiment, the first tubular member is configured to have a skewed bend.

[0023] In at least one embodiment, the first fluid passage inlet includes a connecting member configured to be fluid-tightly connected to the container such that the first fluid is completely contained within the container. In at least one embodiment, the container is in a gravity-supply or siphon-supply configuration relative to the two fluid nozzles.

[0024] In at least one embodiment, the second fluid passage inlet includes a connecting member configured to engage with the second fluid source in a fluid-tight manner, such that the second fluid is completely contained within the second fluid source without leakage.

[0025] In at least one embodiment, the second fluid source is a compressed air blower.

[0026] In at least one embodiment, the two fluid nozzles do not have an air horn that extends laterally beyond the head of the second fluid nozzle.

[0027] In at least one embodiment, the first fluid opening and the second fluid opening are each arc-shaped when viewed along the longitudinal plane and each is rectangular when viewed along the frontal plane.

[0028] In at least one embodiment, the two fluid nozzles do not include an air horn.

[0029] Additional aspects of this disclosure include a spraying device. The spraying device may include the two fluid nozzles. The spraying device may also include: a first fluid source including a container fluidly connected to the two fluid nozzles; and a second fluid source fluidly connected to the two fluid nozzles.

[0030] Additional aspects of this disclosure relate to methods of using a spray device. The method may include attaching the container to the two-fluid nozzles. The method may include positioning the two-fluid nozzles in front of a substrate. The method may include attaching a second fluid source to the two-fluid nozzles. The second fluid source is configured to provide no more than 3 standard cubic feet of air per minute at 90 PSI. The method may include dispensing the first fluid and the second fluid. The method may include atomizing at least a portion of the first fluid to produce a flat, fan-shaped pattern of atomized fluid. The method may include coating the substrate with the atomized fluid. The coating achieves a 12 square inch coating area at a distance of 8 inches from the substrate.

[0031] In at least one embodiment, the method may include dispensing a second fluid from the outlet of the second fluid passage, generating a negative pressure at the first fluid opening, and dispensing and atomizing the first fluid from the first fluid opening without using an air horn to form the coating. In at least one embodiment, the coating may be formed into a fan-shaped pattern using only the first fluid nozzle and the second fluid nozzle without using an air horn.

[0032] The above overview of this disclosure is not intended to describe every disclosed embodiment or implementation of this disclosure. The following description illustrates exemplary embodiments in more detail. Attached Figure Description

[0033] To facilitate identification of any particular element or action being discussed, one or more of the most significant digits in the reference numerals refer to the reference numeral that first introduced the element.

[0034] Figure 1 A perspective view of a current air-assisted first fluid spray gun according to one embodiment is shown.

[0035] Figure 2A block diagram of a spray device according to one embodiment is shown.

[0036] Figure 3A This is a perspective view of one embodiment of the nozzle body;

[0037] Figure 3B It is cut along the longitudinal plane. Figure 3A A side sectional view of the nozzle body;

[0038] Figure 3C It is cut along the longitudinal plane. Figures 3A to 3B A side sectional view of the second fluid passage;

[0039] Figure 3D It is cut along the longitudinal plane. Figures 3A to 3C A side sectional view of the first fluid passage;

[0040] Figure 3E It is cut along the longitudinal plane. Figures 3A to 3D A side sectional view of the nozzle body;

[0041] Figure 3F It is cut along the horizontal plane. Figure 3E Top sectional view of the nozzle body.

[0042] Figure 4A A nozzle body according to one embodiment is shown;

[0043] Figure 4B An embodiment is shown. Figure 4A The nozzle body.

[0044] Figure 5 A nozzle body according to one embodiment is shown.

[0045] Figure 6A A nozzle body according to one embodiment is shown;

[0046] Figure 6B An embodiment is shown. Figure 6A The nozzle body.

[0047] Figure 7 A nozzle body according to one embodiment is shown.

[0048] Figure 8 It is a nozzle body according to an implementation plan.

[0049] Figure 9A It is a cross-sectional view of the nozzle body according to one embodiment, taken along a longitudinal plane;

[0050] Figure 9B It is based on an implementation plan. Figure 9A A perspective sectional view of the implementation scheme.

[0051] Figure 10 A spraying device according to one embodiment is shown. Detailed Implementation

[0052] In one aspect of this disclosure, a two-fluid nozzle can use arcuate and rectangular openings for each fluid to create a flat, fan-shaped spray pattern of atomized fluids for a variety of applications, including applying coating media (such as primers, paints, and / or clear coats) to vehicle parts. The openings can be adjacent, allowing the Venturi effect to be used to draw in the first fluid without requiring separate pressurization of the first fluid. Furthermore, a second fluid opening can be used instead of a laterally protruding air horn to perform the shaping.

[0053] Compared to current handheld spray devices, the two-fluid nozzle of this disclosure reduces air consumption, noise generation, power consumption, and / or increases coating transfer efficiency. While the two-fluid nozzle of this disclosure is designed to address some of the drawbacks associated with current handheld spray devices, it should be understood that the two-fluid nozzle disclosed herein can be readily constructed for other devices and / or applications requiring fluid atomization.

[0054] Figure 1 An exemplary spraying device 108 is shown. The spraying device 108 may have a nozzle 110 configured to spray a first fluid using a second fluid. The nozzle 110 may include a pair of air horns 116. The spraying device 108 may be arranged along and rotatable about a longitudinal axis 106. Both a longitudinal plane 102 and a transverse plane 104 may intersect the longitudinal axis 106.

[0055] In at least one embodiment, the longitudinal plane 102 may be aligned with a portion of the container 112, the second fluid passage inlet 114, and the nozzle 110. This particular spraying device 108 may be arranged to spray such that the liquid is aligned along the longitudinal plane 102. The nozzle 110 may have an air horn 116 aligned with the transverse plane 104. The base of the nozzle 110 may be aligned along a frontal plane (not shown).

[0056] In at least one embodiment, the longitudinal plane 102 may be defined by the nozzle 110 or a spray pattern. For example, a vertical spray pattern distributed by the spray device 108 may define a portion of the longitudinal plane 102 (in addition to the fluid flow). In one example, the air horn 116 may be aligned with the transverse plane 104.

[0057] Figure 2A spray device 202 with a two-fluid nozzle 204 is shown. The two-fluid nozzle 204 may be formed from a nozzle body 206 (which may be a single integral nozzle body) or from multiple separate nozzle bodies. The two-fluid nozzle 204 of this application may be assembled from two or more parts or integrally formed from a single material using a variety of known techniques, including injection molding, compression molding, machining, 3D printing, forging, casting, and combinations thereof. Any suitable material may be used to manufacture the two-fluid nozzle 204, such as thermoplastics like polypropylene, nylon, polytetrafluoroethylene, or acetal; metals such as brass and stainless steel; ceramics such as alumina; and combinations thereof. For example, the nozzle body 206 may be a combination of a first fluid nozzle and a second fluid nozzle formed separately and then assembled.

[0058] In at least one embodiment, the two-fluid nozzle 204 may be configured to receive two separate fluids in an uncombined state, and then combine the first and second fluids adjacent to the farthest portion of the nozzle body 206. In at least one embodiment, the combination of the two fluids may occur precisely outside the nozzle body 206 (external mixing two-fluid nozzle). In at least one embodiment, the combination of the two fluids may occur precisely inside the nozzle body 206 (internal mixing two-fluid nozzle).

[0059] The nozzle body 206 may have a first fluid passage 228 and a second fluid passage 232 formed therein. For example, the nozzle body 206 may have one or more internal features forming the first fluid passage 228 or the second fluid passage 232. For example, the nozzle body 206 may have a plurality of tubular members disposed within the nozzle body 206 for conveying fluid. Various nozzle bodies 206 are described herein. The first fluid passage 228 may have a first fluid passage inlet 230 and a first fluid passage outlet 224, each formed by a structural element. The second fluid passage 232 may also have a second fluid passage inlet 222 and a second fluid passage outlet 226, each formed by a structural element. For example, the first fluid passage outlet 224 and the second fluid passage outlet 226 may be formed by openings in the nozzle body 206.

[0060] The spray device 202 may include a first fluid source 218 containing a first fluid 220 and a second fluid source 210 containing a second fluid 212. In at least one embodiment, the first fluid may be a liquid, such as paint, paint layer, colorant, varnish, water, or a combination thereof. In at least one embodiment, the second fluid 212 is air, nitrogen, oxygen, steam, or a combination thereof. For example, the spray device 202 may be used in a vehicle repair body shop to apply a first fluid coating medium (such as primer, paint, and / or clear coat) to parts of a vehicle. In such applications, the second fluid 212 may be pressurized air. The first fluid 220 may be pressurized but is not required to be pressurized. In some embodiments, the first fluid 220 is not pressurized by means other than hydrostatic pressure.

[0061] Using various attachment features, a first fluid source 218 is fluidly connected to a first fluid passage inlet 230, and a second fluid source 210 is fluidly connected to a second fluid passage inlet 222. The attachment is preferably releasable, but in some embodiments it can be permanent.

[0062] The first fluid source 218 or the second fluid source 210 may include any suitable container, reservoir, or housing that may be directly or indirectly (e.g., via a conduit) attached to the first fluid passage inlet 230 or the second fluid passage inlet 222 of the nozzle body 206. The first fluid source 218 or the second fluid source 210 may each be reusable or disposable and may be pre-filled with fluid or can be filled in the field.

[0063] In some embodiments, at least one of the first fluid source 218 and the second fluid source 210 is pressurized. In some embodiments, the first fluid source 218 is not internally pressurized. In other embodiments, the first fluid source 218 is not pressurized by means other than hydrostatic pressure (e.g., the first fluid source 218 is vertically positioned above the nozzle body 206, meaning that along the longitudinal plane and above the nozzle body 206, gravity will cause the first fluid 220 to generate internal pressure in the container).

[0064] The spray device 202 may optionally include one or more actuators to manage fluid flow within the device. A second fluid actuator 208 manages the flow of a second fluid 212 from a second fluid source 210 to a second fluid passage inlet 222. In one embodiment, the second fluid actuator 208 may be a compressed air blowgun. Similarly, a first fluid actuator 216 manages the flow of a first fluid 220 from a first fluid source 218 to a first fluid passage inlet 230. The first fluid actuator 216 and the second fluid actuator 208 may be of the same or different types. Exemplary actuators include manual triggers, needle valves, ball valves, lift valves, slit valves, dome valves, duckbill valves, umbrella valves, and combinations thereof.

[0065] The spray device 202 can be used in various applications involving fluid atomization. In one embodiment, the spray device 202 is used to coat a substrate. A nozzle body 206 is positioned in front of a substrate (not shown). In a siphon supply configuration, a first fluid 220 is directed through a siphon tube 214 and into a first fluid passage outlet 224, while a second fluid 212 is directed through a second fluid passage outlet 226. At least a portion of the first fluid 220 is atomized by the second fluid 212 to produce a flat, fan-shaped pattern of atomized fluid. The substrate is then coated with the atomized fluid.

[0066] Figures 3A to 3F A nozzle body 302 is shown, which is an embodiment of nozzle body 206. The nozzle body 302 may have a front surface 328, a rear surface 326, and a longitudinal axis 324 extending from the front surface 328 to the rear surface 326 (which may also define a longitudinal plane).

[0067] In at least one embodiment, the front surface 328 may be defined by the front portion of the nozzle body 302 (e.g., a first fluid nozzle head 318 or a second fluid nozzle head 388). In at least one embodiment, the front surface 328 may be defined by the most distal portion of the nozzle body 302 (or its nozzle head or opening).

[0068] In at least one embodiment, the rear surface 326 may be defined by the rear portion of the nozzle body 302. As shown, the rear surface 326 forms part of the second fluid passage inlet 364. The longitudinal axis 324 may also be defined by the flow of a second fluid within the second fluid passage 308.

[0069] The first fluid passage inlet 306a and the second fluid passage inlet 310a may each form an independent passage for the first fluid passage 304 and the second fluid passage 308 and are formed within a portion of the nozzle body 302.

[0070] The first fluid passage 304 is disposed within the nozzle body 302 to fluidly connect the first fluid passage inlet 306a and the first fluid passage outlet 306b.

[0071] The first fluid passage 304 may be formed by the first fluid nozzle head 318 and the first tubular member 316.

[0072] In at least one embodiment, the first fluid passage 304 may be at least partially formed by a first tubular member 316, which may define a portion of the first fluid passage 304. The first tubular member 316 includes an outer surface 336a and an inner surface 336b. The first fluid may primarily contact the inner surface 336b, but may contact the outer surface 336a in a region adjacent to the first fluid opening 322.

[0073] like Figure 3B As shown, the first tubular member 316 may have an opening 350 corresponding to the first fluid passage inlet 230. Other openings 390 may lead to the first fluid nozzle head 318. The openings may be formed by the first tubular member 316 itself.

[0074] The first tubular member 316 may be arranged along a single axis, but is shown aligned along two axes (liquid inlet axis 346 and liquid outlet axis 344). In at least one embodiment, the liquid inlet axis 346 and the liquid outlet axis 344 may intersect to create a skew bend 356 in the first fluid passage 228 defined by the placement of the opening 390. In one example, the first fluid passage outlet 306b and the first fluid passage inlet 230 are arranged perpendicular to each other. For example, the liquid inlet axis 346 and the liquid outlet axis 344 may form an angle between 80 degrees and 100 degrees.

[0075] In at least one embodiment, an opening 390 is formed in the inner surface 336b and defined by a protrusion 352. For example, a liquid outlet axis 344 may be defined by the opening 390 and a first fluid opening 322. In at least one embodiment, the protrusion 352 may be close to the intersection of the liquid outlet axis 344 and the liquid inlet axis 346. The corner formed at the protrusion 352 may be square, round, or a combination thereof. In at least one embodiment, the liquid outlet axis 344 is coaxial with or parallel to the longitudinal axis 324 of the nozzle body 302 or the second fluid passage 308.

[0076] In at least one embodiment, the first fluid nozzle head 318 may extend outward along a single plane coplanar with the liquid inlet axis 346 and extending along the liquid outlet axis 344. In at least one embodiment, the arcuate edge portions 374a and 374b may form an angle 372 that establishes overall liquid diffusion in the longitudinal plane. For example, the total range of angle 372 may be from 0 degrees to 180 degrees, or from 0 degrees to 120 degrees. The fan may form a half angle relative to the liquid outlet axis 344. In at least one embodiment, the half angle is between 0 degrees and 80 degrees relative to the liquid outlet axis 344.

[0077] like Figure 3B and Figure 3EAs shown, the blade cavity 342 may be formed adjacent to the arcuate edge 348 and within the inner surface 336b. In at least one embodiment, the blade cavity 342 extends outward in a longitudinal plane, not, for example, in a transverse plane. The blade cavity 342 may be used to agitate a first fluid before it is atomized in a fan shape in the liquid inlet axis 346 or along the positive plane. The blade cavity 342 may be defined by a protrusion 352 that may concentrate the first fluid passage 228 before the first fluid is atomized in a fan shape. The first tubular member 316 may have the protrusion 352 formed on the inner surface 336b. In at least one embodiment, the blade cavity 342 may be a result of using the first tubular member 316 to change the direction of liquid flow. In at least one embodiment, the first tubular member 316 may have an arcuate edge portion 374a, an arcuate edge portion 374b opposite to the arcuate edge portion 374a, an arcuate edge portion 374c, and an opposing arcuate edge portion 374d forming part of the blade cavity 342.

[0078] like Figure 3D As shown, the fan shape of the first fluid nozzle head 318 may have a first fluid opening height dimension 368 and an outer arc-shaped edge height dimension 366. The outer arc-shaped edge height dimension 366 is greater than the first fluid opening height dimension 368, causing the first fluid to expand as it exits the first fluid opening 322. In at least one embodiment, the first fluid nozzle head 318 may generate a fan-shaped pattern when dispensing the first fluid without pre-pressurizing the first fluid.

[0079] In at least one embodiment, the fan-shaped pattern may define the longitudinal plane 370 of the nozzle body 302. For example, if the fan-shaped pattern of the first fluid is slightly skewed from a vertical orientation, the longitudinal plane 370 (and the transverse plane) of the nozzle body 302 may be based on the applied spray pattern.

[0080] The first fluid opening 322 can be aligned along a longitudinal plane 370, which can be parallel to a longitudinal plane 360a that can be aligned with at least one of the second fluid openings 320. Figure 3C (as shown in the image).

[0081] In at least one embodiment, a portion of the fan shape may be formed by a protruding portion 352 and an arcuate edge 348 (which may form a portion of the first fluid opening 322).

[0082] like Figure 3D As shown, each of the corners is rounded to reduce or eliminate secondary flows that may occur under square or sharp corners. Secondary flows can generate vortices and eddies, which can disrupt the consistency of the atomized fluid spray pattern. The inner surface 336b of the first tubular member 316 may include one or more features (e.g., grooves, dividers, vortex generators, struts / pillars, and various textures).

[0083] In at least one embodiment, the first fluid nozzle head 318 and the first tubular member 316 may be integrally molded or attached. In at least one embodiment, a portion of the first fluid nozzle head 318 may be a harder material overlaid with a softer material (based on Shore A hardness).

[0084] In at least one embodiment, the first fluid passage outlet 306b may be associated with a first fluid opening 322 formed by the first fluid nozzle head 318. The first fluid can exit the nozzle body 302 through the first fluid opening 322 formed in the first fluid nozzle head 318. In at least one embodiment, the first fluid opening 322 is configured to dispense the first fluid into a second fluid.

[0085] like Figure 3E As shown, a first fluid opening 322 defined by an arcuate edge 348 (e.g., arcuate edge portions 374a, 374b, and 374c) is formed in a first fluid nozzle head 318. In at least one embodiment, the arcuate edge 348 defines a portion of the front surface 328 of the nozzle body 206.

[0086] In at least one embodiment, when viewed in cross-section at the front plane (similar to...) Figure 6B (See view in the image), the first fluid opening 322 is rectangular in shape. Although the dimensions of the first fluid opening 322 may vary depending on the application, its height (e.g., the height dimension 366 of the outer arcuate edge or the height dimension 368 of the first fluid opening defined by the arcuate edge portion 374c) is typically larger than that shown in the image. Figures 3D to 3F The width shown (e.g., the width dimension 382 of the first fluid opening 322 as measured from the arcuate edge portion 374c to the arcuate edge portion 374d).

[0087] In at least one embodiment, the height may be measured based on the perimeter along the arcuate edge 348, or, as used herein, the height may be the arcuate length measured from the opposing wall portion within the longitudinal plane 102. In at least one embodiment, the height of the first fluid opening 322 is at least 1.01 to 100 times its width, more specifically 10 to 30 times its width.

[0088] As used herein, the width is the average distance between opposing wall portions within the transverse plane 104. In at least one embodiment, the dimensions of the curved edge portions 374a and 374b may define the width dimension 382. In at least one embodiment, the space between the curved edge portions 374c and 374d may define the width dimension 382.

[0089] In some implementations, regardless of curvature, the rectangular slot of the first fluid opening 322 projects a rectangular shape onto the longitudinal plane 102.

[0090] However, the shape of the first fluid opening 322 in the frontal plane is not particularly limited. In some embodiments, the first fluid opening 322 is a slit or slot. Although interchangeable, a slit can generally be longer and thinner than a slot. In alternative embodiments, the first fluid opening 322 can be a regular or irregular elliptical, rectangular, or semi-circular shape. In some embodiments, the first fluid passage outlet 306b projects a rectangular shape onto the longitudinal plane 360a.

[0091] In at least one embodiment, the first fluid opening 322 may be arc-shaped when viewed in cross-section at a plane (in... Figure 3D and Figure 3E (shown as arcuate in the longitudinal plane). For example, the first fluid nozzle head 318 may have an arcuate portion. In at least one embodiment, the first fluid nozzle head 318 may have at least two arcuate wall portions. The first fluid opening 322 may be formed by at least two edges (e.g., arcuate edge portions 374a, 374b, 374c, and 374d).

[0092] like Figure 3D As shown, the first fluid opening 322 is formed by four arcuate edge portions. In at least one embodiment, the first fluid passage may also be formed at least partially by arcuate wall portions, which are formed by the thickness of the first fluid nozzle head 318. The arcuate wall portions are arcuate because they have a portion / face shaped as an arc.

[0093] In at least one embodiment, the first fluid opening 322 may have a fan shape when viewed along a longitudinal plane, wherein the fan shape extends as the first fluid passage 228 continues toward the first fluid nozzle head 318. In at least one embodiment, the arcuate edge 348 may have an arcuate shape on one edge that follows the curvature of the dome-shaped portion of the second fluid nozzle head 388. In at least one embodiment, the arcuate edge 348 may have a thickness that forms the fan shape.

[0094] The second fluid passage inlet 310a can supply the second fluid to the second fluid passage outlet 310b via the second fluid passage 308 formed in the nozzle body 206.

[0095] In at least one embodiment, the longitudinal axis 324 may be defined by the alignment of the second fluid passage 308, the second fluid passage inlet 310a, and the second fluid passage outlet 310b, or by the flow of the second fluid.

[0096] In at least one embodiment, the second fluid passage 308 may be formed substantially by the second tubular member 334. The rear surface 326 of the second tubular member 334 may include a rear surface 326 forming an opening 338 for the second fluid passage inlet 310a.

[0097] In at least one embodiment, a second fluid passage inlet 310a is disposed on the nozzle body 302 and directly or indirectly connected to a second fluid source. The location of the second fluid passage inlet 310a is not particularly limited, but is generally positioned such that the second fluid source does not interfere with the atomization and distribution of the fluid. In one embodiment, the second fluid passage inlet 310a is located on the rear surface 326 of the nozzle body 302. In another embodiment, the second fluid passage inlet 310a is located on the front surface 328 of the nozzle body 302. In still some other embodiments, the second fluid passage inlet 310a is located on a portion of both the front surface 328 and the rear surface 326 of the nozzle body 302.

[0098] The shape of the second fluid passage inlet 310a is not particularly limited. However, the portion of the nozzle body 302 containing the second fluid passage inlet 310a is typically configured to attach directly or indirectly to an external second fluid source. In an exemplary embodiment, the second fluid passage inlet 310a includes a tab configured to mate with a complementary attachment device, such as a slot in the housing of the second fluid source or a slot in a conduit (e.g., a pipe) for supplying a second fluid from the second fluid source. The nozzle body 302 can be readily configured for other known attachment devices, including threaded connections, snap-fit ​​connections, press-fit connections, quick-release connections, compression fits, hose barbs, ultrasonic welding, rotary welding, and overmolding. For example, the second tubular member 334 may also include a connecting member 312 that facilitates connection to a second fluid source or actuator. As shown, the connecting member 312 is a ridge or barb that enables press-fit connection to a pneumatic hose or quick-connect coupling.

[0099] The second tubular member 334 can be arranged along the longitudinal axis 324, such as Figure 3A and Figure 3B As shown. The second tubular member 334 may include an outer surface 314a and an inner surface 314b. As used herein, outer surface 314a and outer surface 336a may also refer to the outer surface of the nozzle body 302 as a whole.

[0100] In some embodiments, at least a portion of the second tubular member 334 is a cylindrical cavity that always has a constant cross-sectional area. In at least one embodiment, at least a portion of the second tubular member 334 is a cylindrical cavity, wherein the cross-sectional area of ​​the second fluid passage 308 varies in the frontal plane. At least a portion of the second tubular member 334 is a cylindrical cavity, wherein the cross-sectional area decreases from the second fluid passage inlet 310a to the second fluid passage outlet 310b when viewed in the longitudinal plane, thereby reducing pressure and increasing the exit of the second fluid. Figure 3C The velocity of the second fluid opening 320 shown.

[0101] In at least one embodiment, the first tubular member 316 may further include a tapered portion 330. The tapered portion 330 may taper into the dome-shaped portion 332 of the second fluid nozzle head 388. In at least one embodiment, depending on the configuration, the tapered portion 330 may form part of the second fluid nozzle head 388 or the first tubular member 316. For example, if the second fluid nozzle head 388 is separable from the first tubular member 316 and the tapered portion 330 is integral with the dome-shaped portion 332, then the tapered portion 330 is disposed on the second tubular member 334.

[0102] In at least one embodiment, the tapered portion 330 may form a chamber 340 that converges into the second fluid nozzle head 388 such that the second fluid has a higher pressure relative to the second fluid at the rear surface 326 when it travels in the second fluid passage 308. The second tubular member 334 may be arranged to form a tapered portion 330 that tapers into the dome-shaped portion 332 on its outer surface.

[0103] The nozzle body 302 also includes a second fluid nozzle head 388. The second fluid nozzle head 388 may have a second fluid opening 320 formed therein and form part of a second fluid passage 308. The second fluid passage outlet 310b may refer to the second fluid opening 320, or vice versa.

[0104] The second fluid nozzle head 388 may include a dome-shaped portion 332 that directs air into a second fluid opening 320 formed therein. The dome-shaped portion 332 may further taper into the second fluid opening 320. A second fluid may flow into a second fluid passage inlet 310a and exit through the dome-shaped portion 332. In at least one embodiment, the second fluid nozzle head 388 is configured to be removed from the first tubular member 316 (e.g., to reduce waste). For example, the dome-shaped portion 332 may be detached from the tapered portion 330.

[0105] The dome-shaped portion 332 can guide the second fluid into the second fluid opening 320 to change the pressure, direction, and / or velocity of the second fluid relative to the first fluid. It has been found that the dome-shaped portion 332 can reduce the airflow required to form a fan-shaped atomized spray pattern. This is particularly true when configured as an externally mixing two-fluid nozzle.

[0106] The dome-shaped portion 332 may include a dome surface 358 on the outer surface 314a. The dome-shaped portion 332 may have a second fluid opening 320 formed therein. The second fluid opening 320 may interrupt a portion of the dome surface 358. The second fluid opening 320 may be formed from the inner edge of the dome of the dome of the dome-shaped portion 332.

[0107] The dome-shaped portion 332 may form at least a portion of the front surface 328. In at least one embodiment, the dome-shaped portion 332 may have an inner edge 392 therein forming a second fluid opening 320. The inner edge 392 may collectively form a periphery 384. The inner edge 392 may define a rectangular, arcuate slot that follows the contour of the dome-shaped portion 332.

[0108] The second fluid opening 320 and the inner edge 392 of the dome can form part of the second fluid passage outlet 226. Therefore, as Figure 3D As shown, the second fluid can be conveyed from the second fluid passage inlet 310a through the second tubular member 334 and can be concentrated in the conical portion 330 and the dome-shaped portion 332 to form a high-pressure region. The second fluid can be distributed under pressure through the second fluid opening 320. In at least one embodiment, the pressure can be at least 2 bar, at least 2.5 bar, or at least 3 bar.

[0109] The inner edge 392 of the dome may include at least four inner edges, with two pairs of inner edges facing each other. For example, the inner edge 392 may include inner edge portions 362a and 362b (in... Figure 3E (as described in the text) and the inner edge portion 362d and the inner edge portion 362c of the dome (in the text) Figure 3F (As described in the text). The inner edge 392 of the dome and the arcuate edge portion 374c of the first tubular member 316 can together form the second fluid opening 320.

[0110] In at least one embodiment, at least a portion of the second fluid opening 320 may be aligned along the longitudinal plane 360a.

[0111] The second fluid opening 320 may be formed by the space or gap 378 between the inner edge 392 of the dome and the arcuate edge 348. Figure 3FThe second fluid opening 320 in the dome-shaped portion 332 is shown to include both a second fluid opening portion 386c and a second fluid opening portion 386d separated from the first fluid nozzle head 318. Both the second fluid opening portion 386c and the second fluid opening portion 386d may have different longitudinal planes parallel to each other.

[0112] In at least one embodiment, the inner edge portion 362d of the dome and the arcuate edge portion 374c may define the second fluid opening portion 386d, and the inner edge portion 362d of the dome and the arcuate edge portion 374d define the second fluid opening portion 386c.

[0113] The second fluid opening 320 may further include a top second fluid opening portion and a bottom second fluid opening portion. The second fluid opening portion 386a may be formed by an inner dome edge portion 332a and an arcuate edge portion 374a within the dome-shaped portion 362. In at least one embodiment, the arcuate edge portion 374a may be formed on the exterior of the first fluid nozzle head 318 to form the boundary of the second fluid opening 386b. The second fluid opening portion 386b may be formed by an inner dome edge portion 362b and an arcuate edge portion 374b. The second fluid opening portions 386a and 386b may be formed between a gap in the wall portion and the inner dome edge (e.g., gap 378).

[0114] As shown in the figure, the farthest part of the first fluid nozzle head 318 and the dome-shaped part 332 can be flush or aligned on the front surface 328 along the front plane of the nozzle body 302.

[0115] In at least one embodiment, the width dimension 382 may be greater than the width of the second fluid opening portion 386d or the second fluid opening portion 386c. For example, the second fluid opening portion 386c or 386d may be a gas opening adjacent to the liquid opening. The width of the second fluid opening portion may be the distance from the outer surface of the first fluid nozzle head 318 to the inner surface of the second 362c or 362d. The width may be the space between the inner edge of the side dome and the arcuate edge wall of the first fluid nozzle head 318. In at least one embodiment, the width dimension 382 may be at least 1.5 or 2 times larger than the width of the second fluid opening portion 386c or the second fluid opening portion 386d.

[0116] As shown, the arcuate edge 348 of the first fluid nozzle head 318 follows the contour of the dome-shaped inner edge 392 of the second fluid nozzle head 388. For example, the first fluid opening 322 may have the same overall contour as the second fluid opening 320. In at least one embodiment, the second fluid opening 320 is arcuate and the dome-shaped portion 332 is optional.

[0117] The first fluid opening 322 may be at least partially disposed within the second fluid opening 320 such that the flow of the second fluid atomizes the first fluid. In at least one embodiment, the second fluid opening 320 surrounds the first fluid opening 322. Therefore, the second fluid nozzle head 388 may be coaxial with the first fluid nozzle head 318. In at least one embodiment, the second fluid opening portion 386c may be adjacent to the first fluid opening 322 on one side of the first fluid nozzle head 318 (separated by the arcuate edge portion 374c). The second fluid opening portion 386d may be directly opposite to and adjacent to the first fluid opening 322 on the other side of the first fluid nozzle head 318 and separated by the arcuate edge portion 374d.

[0118] The second fluid opening portion 386c may form a first longitudinal plane, and the second fluid opening portion 386d may form a second longitudinal plane. The first and second longitudinal planes may be parallel to each other and parallel to the plane formed by the second fluid opening 320. In at least one embodiment, the transverse plane formed by the second fluid opening portions 386a and / or 386b may be orthogonal to the plane of the second fluid opening 320. In at least one embodiment, the second fluid opening portion 386a may have a smaller area than the second fluid opening portion 386c.

[0119] In at least one embodiment, a first fluid can be drawn through a first fluid passage inlet 306a through a first tubular member 316 and discharged through a first fluid opening 322 in a first fluid nozzle head 318. When discharged through a second fluid passage outlet 310b, a second fluid can be drawn through a first fluid passage 304 via a Venturi effect to draw in the first fluid. The first fluid discharged through the first fluid opening 322 can be atomized by the second fluid.

[0120] Figure 4A and Figure 4B A nozzle body 402 is shown, which is an alternative embodiment of nozzle body 206. For example, the second fluid nozzle head of nozzle body 402 may be identical to the second fluid nozzle head 388. In at least one embodiment, the distal portion 404 of the first fluid nozzle head 408 may extend beyond the distal portion 406 of the dome-shaped portion 332 to create a shape such as Figure 4A and Figure 4B The external mixing two-fluid nozzle shown.

[0121] Figure 5A nozzle body 502 is shown, which is an alternative embodiment of nozzle body 206. For example, the second fluid nozzle head of nozzle body 502 may be the same as the second fluid nozzle head 388. In at least one embodiment, the distal portion 506 of the first fluid nozzle head 508 may be recessed along the frontal plane from the distal portion 504 of the dome-shaped portion 332, as shown. Figure 5 As shown. The first fluid nozzle head 508 may be recessed, such that the farthest portion 506 of the first fluid nozzle head 318 forms an internally mixing two fluid nozzle. In at least one embodiment, the farthest portion 506 does not extend more than half the depth of the dome-shaped portion 332 (along the longitudinal axis).

[0122] Figure 6A and Figure 6B A nozzle body 602 is shown, which is an alternative embodiment of nozzle body 206. Nozzle body 602 may be identical to nozzle body 302, except that the second fluid opening 612 of the second fluid nozzle head 618 has a different shape. Nozzle body 602 may include a first fluid passage 304 (which is arranged identically to that in nozzle body 302). For example, the first fluid opening 322 may be formed by an arcuate edge 348 and may be fan-shaped. The arcuate edge 348 may include arcuate edge portions 374a, 374b, 374c, and 374d.

[0123] The nozzle body 602 may further include a second fluid nozzle head 618 formed within the nozzle body 602. The second fluid nozzle head 618 may include a second fluid opening 612 formed in the dome-shaped portion 608. For example, the dome-shaped portion 608 may have an inner edge 606 with a periphery. The inner edge 606 may include inner edge portions 614a, 614b, 614c, and 614d.

[0124] The second fluid opening 612 may be defined by the inner edge 606 of the dome. For example... Figure 6B As shown, the second fluid opening 612 can be in a superelliptical shape.

[0125] The second fluid opening 612 may be further divided into a plurality of second fluid openings. For example, the second fluid opening 612 may include a second fluid opening portion 616a, a second fluid opening portion 616b, a second fluid opening portion 616c, and a second fluid opening portion 616d. The second fluid opening portion 616a may be formed by a longitudinal gap 604 between the arcuate edge portion 374a and the dome inner edge portion 614a. The second fluid opening portion 616b may be formed by a longitudinal gap between the arcuate edge portion 374b and the dome inner edge portion 614b. The second fluid opening portion 616c may be formed by a transverse gap between the arcuate edge portion 374c and the dome inner edge portion 614c. The second fluid opening portion 616d may be formed by a transverse gap 610 between the arcuate edge portion 374d and the dome inner edge portion 614d. In at least one embodiment, the transverse gap 610 is larger than the longitudinal gap 604.

[0126] In at least one embodiment, the inner edge portions 614c and 614d of the dome extend outward from the first fluid opening 322. In at least one embodiment, any portion of the inner edge 606 of the dome may be coupled to any portion of the arcuate edge 348. For example, the inner edge portions 614a and 374a, or the inner edge portions 614b and 374b of the dome, may be connected by a connecting member. In one example, the connecting member may be integral with both the inner edge portions 614a and 374a. In another example, the connecting member may be an adhesive or mechanical fastener that does not significantly interfere with the second fluid flow. The connecting member may maintain the separation between the inner edge 606 of the dome and the arcuate edge 348.

[0127] Figure 7 A nozzle body 702 is shown, which is an alternative embodiment of nozzle body 206. Nozzle body 702 may be identical to nozzle body 302, except that the first fluid passage 704 has a different first fluid nozzle head 708. For example, nozzle body 702 may include a second fluid nozzle head 388 identical to nozzle body 302 and providing a second fluid.

[0128] Although the first fluid nozzle head 318 forms a single, uninterrupted rectangular slot, the first fluid nozzle head 708 (and the first fluid opening 710) may be divided into two or more segments to create multiple openings (e.g., openings 712a, 712b, 712c, and 712d). The openings may have varying or uniform shapes and / or sizes. The baffle wall 706 constituting each segment may be featureless.

[0129] Figure 8A nozzle body 802 is shown, which is an alternative embodiment of nozzle body 206. Nozzle body 802 may be identical to nozzle body 302, except that the curved edge 806 may include a partial feature 804. In at least one embodiment, the partial feature 804 can be used to modify fluid flow. The partial feature 804 may be provided on the surface of the curved edge 806. Examples of the partial feature 804 may include grooves, pillars / columns, and various textures.

[0130] Figure 9A and Figure 9B The nozzle body 900 is shown. Figure 2 An embodiment of nozzle body 206 is described. Nozzle body 900 is similar to nozzle body 302. For example, nozzle body 900 may have a first fluid passage 902 and a second fluid passage 904 formed therein. Nozzle body 900 may have a first fluid nozzle head 918. Nozzle body 900 may include a second tubular member 912 having an inner surface 910. Baffle 906 may be disposed on the inner surface 910 near or within the second fluid nozzle head 914. Baffle 906 may be formed by at least one baffle wall 908. Baffle 906 may be configured to interrupt airflow from a second fluid source. In at least one embodiment, baffle wall 908 is continuous and forms an annular ring. In another embodiment, baffle wall 908 may also be discontinuous and include any of a plurality of walls. As shown, baffle wall 908 is cylindrical, but may also be any shape (polygonal, triangular, elliptical). In at least one embodiment, the width dimension (e.g., measured along a transverse plane) may be greater than the width dimension of the base portion of the dome-shaped portion 916. The width dimension may be the diameter of the baffle 906 (or the minor axis if it is elliptical).

[0131] Figure 10 A spraying device 1002 is shown, which is an embodiment of spraying device 202. For example, spraying device 1002 may include a second fluid source 1012 connected to a connecting member 1010, which facilitates connection to a two-fluid nozzle 1008. The two-fluid nozzle 1008 may be any nozzle body of the construction described herein. The two-fluid nozzle 1008 may include a siphon tube 1006 that siphons a first fluid 1014 from a container 1004.

[0132] The spray device 1002 and the two-fluid nozzle 1008 contained therein are designed to utilize the Venturi effect in some instances. For example, when pressurized gas is discharged through the second fluid opening, the second fluid can create a low-pressure zone adjacent to the first fluid opening. The low-pressure zone draws or assists in drawing the first fluid into the path of the low-pressure zone and the pressurized gas through the first fluid opening. The shear force of the pressurized gas on the first fluid causes atomization of the first fluid.

[0133] While a low-pressure area is generally sufficient to draw the first fluid through the first fluid opening, it should be understood that the first fluid can be dispensed under hydrostatic pressure and / or pressurized by an external air source. For example, in some embodiments, container 1004 may be raised above the two-fluid nozzle 1008 (along the longitudinal plane) during operation. In such instances, the dispensing of the first fluid from the first fluid opening will be affected by both the Venturi effect and the hydrostatic pressure resulting from the position of container 1004 above the two-fluid nozzle 1008. In other embodiments, the first fluid may be pressurized by, for example, a pump or an external air source.

[0134] The atomized fluid is facilitated by a rectangular slot and a second fluid opening, which diffuses the atomized first fluid into a flat, fan-shaped pattern. The size of the flat, fan-shaped pattern is influenced by the size of the second fluid opening and / or the size of the first fluid opening.

[0135] Because the shaping and atomizing functions are combined into a single airflow, the two-fluid nozzle of this disclosure is far simpler than conventional air atomization, air spraying, air-assisted, or blower atomization methods that require adjusting multiple airflows. Furthermore, it eliminates the need for one or more separate pressurized airflows to shape the atomizer fluid, thereby reducing pressurized air consumption by up to half.

[0136] Therefore, this disclosure particularly provides atomizers, systems comprising such atomizers, and methods of utilizing such atomizers. The following claims set forth various features and advantages of this disclosure.

[0137] The term "comprising" and its variations are not intended to be limiting wherever they appear in the specification and claims. Such terms are to be understood as implying the inclusion of the stated steps or elements or groups of steps or elements, but not excluding any other steps or elements or groups of steps or elements. The term "consisting of..." is limited to what follows the phrase "consisting of...". Therefore, the phrase "consisting of..." indicates that the listed elements are required or mandatory, and that no other elements may be present. The term "substantially consisting of..." means any element listed following that phrase, and is limited to other elements that do not impede or contribute to the activity or effect specified for the listed elements in this disclosure. Therefore, the phrase "substantially consisting of..." indicates that the listed elements are required or mandatory, but other elements are optional and may or may not be present depending on whether they substantially affect the activity or effect of the listed elements.

[0138] In this application, terms such as “a,” “an,” “the,” and “the” are not intended to refer only to a single entity, but rather to encompass general categories, with specific examples provided for illustration. The terms “a,” “an,” “the,” and “the” are used interchangeably with the phrases “at least one” and “one or more.” The phrases “at least one of…” and “containing at least one of…” followed by a list refer to any item in the list and any combination of two or more items in the list.

[0139] Unless otherwise clearly stated in the content, the term "or" is generally used in the common sense, including "and / or".

[0140] The term “and / or” means one or all of the listed elements, or any combination of two or more of the listed elements.

[0141] In addition, in this article, the numerical range expressed by endpoints includes all numbers contained in the range as well as endpoint values ​​(e.g., 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4, 5, etc.).

[0142] Throughout this specification, the reference to "some embodiments" means that a specific feature, configuration, composition, or characteristic described in connection with an embodiment is included in at least one embodiment of this disclosure. Therefore, such phrases appearing throughout this specification do not necessarily refer to the same embodiment as in this disclosure. Furthermore, specific features, configurations, compositions, or characteristics may be combined in any suitable manner in one or more embodiments.

[0143] The terms "preferred" and "ideally" refer to embodiments of this disclosure that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this disclosure.

[0144] The terms “top,” “bottom,” “front,” and “rear” are relative terms that do not imply the application of a specific orientation in space.

[0145] "Proximity" means being immediately adjacent to, adjacent to, or partially located within another object. Proximity can also mean that a part of an object (such as an opening) is immediately adjacent to or adjacent to another part of the object (another opening). Proximity can also mean being located within another object. For example, a first fluid nozzle head may be at least partially located within and adjacent to a second fluid nozzle head (e.g., where a portion of the boundary of the second fluid nozzle head overlaps with the boundary of the first fluid nozzle head).

[0146] "Arc-shaped" refers to a shape that resembles a bow or is curved.

[0147] A "dome" refers to a partially spherical shape. For example, a dome can be composed of two consecutive quadrants of a sphere. A dome does not necessarily have to be a regular three-dimensional object in which every cross-section is circular.

[0148] A "dome surface" refers to a surface composed of two consecutive quadrants of a sphere.

[0149] "External mixing two-fluid nozzle" refers to a structure in which the mixing of gas and a first fluid takes place outside the two-fluid nozzle.

[0150] "Fan-shaped" refers to a segment that is shaped like a circle.

[0151] "Fluid" means one or more flowable materials, including, for example, solids, first fluids, gases, or combinations thereof. A fluid can be a single material or a combination of two or more materials of the same or different phases (e.g., a slurry of solvents and solid particles). In the case of a first fluid spray gun used in vehicle repair, the fluid may include paint, primer, base coat, varnish, gloss varnish, and similar paint-like materials, as well as other materials such as adhesives, sealants, fillers, putty, powder coatings, blasting powders, abrasive slurries, release agents, and casting dressings.

[0152] "Fluid isolation" means that they cannot be combined. For example, a first fluid passage cannot be mixed with a second fluid passage.

[0153] "Completely contained" means completely inside. It can also be sealed or encapsulated.

[0154] "Hydrostatic pressure" refers to the pressure exerted by a fluid in equilibrium at a given point within a fluid due to gravity. Hydrostatic pressure increases proportionally to the depth measured from the surface, as the increased weight of the fluid exerts a downward force from above. Hydrostatic pressure can be used to describe the effect of a container acting as a fluid source connected to an atomizer. The height and therefore weight of the fluid within the container exert a driving force on the fluid entering the atomizer.

[0155] "Internal mixing two-fluid nozzle" refers to a structure in which the mixing of gas and a first fluid takes place inside the two-fluid nozzle.

[0156] "Blade cavity" refers to a sector with a certain thickness that forms a circle in a three-dimensional segment.

[0157] The "longitudinal plane" refers to the plane that divides the nozzle body into left and right sections. The left and right sections are essentially mirror images of each other.

[0158] "Parallel" means side by side and equidistant from each other on two axes or planes. Parallelism can have a tolerance of -10 degrees to 10 degrees.

[0159] "Pressure" refers to gauge pressure (i.e., a measurement of fluid pressure relative to ambient atmospheric pressure). Fluid pressure above ambient atmospheric pressure is considered positive pressure, and fluid pressure below ambient atmospheric pressure is considered negative pressure. Negative pressure conditions can also be referred to as "vacuum," "partial vacuum," or "suction conditions."

[0160] "Pressure" means to place under pressure. The term pressure eliminates static pressure in a fluid.

[0161] A "rectangle" is a quadrilateral with equal angles. A rectangle can also refer to a quadrilateral polygon with a set of parallel sides orthogonal to the second set of parallel sides. The two sets of parallel sides can have the same length (i.e., forming a square). One set of parallel sides may be longer than the other. These sides can be regular or irregular (e.g., curved zigzag patterns, curved sine patterns, discrete or stepped curve patterns, and combinations thereof), and the corners of the polygon can be square, round, or combinations thereof. A rectangle can also refer to a hyperellipse.

[0162] A "hyperellipse" is a shape in which the set of all points (x, y) on a curve satisfies the following equation:

[0163]

[0164] Where n, a, and b are positive numbers. In at least one embodiment, the value of n may be greater than 1. In at least one embodiment, the value of n may be between 1 and 2. In at least one embodiment, the value of n may be greater than 2, thereby forming a rounded rectangle.

[0165] A "tubular member" refers to a circular and hollow structure. Its length may be longer than its diameter. In this context, "circular" can mean having one or more curves, not limited to a regular or circular shape, but also elliptical or irregular shapes. "Tube" can refer to a structure with a circular, rhomboid, polygonal, or elliptical cross-section. The length dimension need not be featureless and may have characteristic protrusions or recesses formed therein.

[0166] A "two-fluid nozzle" refers to a nozzle supplied by a fluid passage for delivering a first fluid stream to be sprayed and another fluid passage for delivering a gas stream. A two-fluid nozzle can be configured to bring the first fluid and the gas into contact and atomize the first fluid.

Claims

1. A two-fluid nozzle, comprising: A nozzle body having a front surface, a rear surface, and a longitudinal axis extending between the front surface and the rear surface to define a longitudinal plane, the nozzle body comprising: A first fluid nozzle head, the first fluid nozzle head including a distal portion located on the front surface of the nozzle body and a first fluid opening formed at the distal portion, wherein the first fluid opening is arc-shaped and rectangular, wherein the first fluid opening is configured to provide first fluid from a first fluid passage inlet via a first fluid passage, the first fluid passage being at least partially formed by a first tubular member; wherein the first fluid nozzle head is fan-shaped, wherein a blade cavity is formed; and The second fluid nozzle head includes the farthest portion of the front surface of the nozzle body and a second fluid opening formed in the farthest portion, wherein the second fluid opening is arc-shaped and rectangular, and wherein the second fluid opening is configured to provide second fluid from a second fluid passage inlet via a second fluid passage, the second fluid passage being at least partially formed by a second tubular member; The first fluid passage and the second fluid passage are at least partially contained within the nozzle body and are fluidly isolated from each other within the nozzle body; The two-fluid nozzles mentioned above are externally mixed two-fluid nozzles; The second fluid opening is positioned adjacent to the first fluid opening such that, when flow occurs, the second fluid from the second fluid opening affects the first fluid from the first fluid opening of the first tubular member, and wherein the second fluid opening at least partially surrounds the first fluid opening.

2. The two-fluid nozzle of claim 1, wherein the farthest portion of the second fluid nozzle head does not extend beyond the farthest portion of the first fluid nozzle head.

3. The two-fluid nozzle according to claim 1, wherein the first fluid opening is arranged in the longitudinal plane of the two-fluid nozzle.

4. The two-fluid nozzle of claim 1, wherein the first fluid nozzle head includes an arcuate edge that partially defines the height dimension of the outer arcuate edge of the first fluid opening.

5. The two-fluid nozzle according to claim 4, wherein the height dimension of the outer arc-shaped edge is greater than the height dimension of the protrusion near the first fluid passage.

6. The two-fluid nozzle of claim 1, wherein the first fluid opening has an outer arcuate edge height dimension defined in the longitudinal plane of the two fluid nozzles, the outer arcuate edge height dimension being greater than the outer arcuate edge width dimension defined in the transverse plane of the two fluid nozzles.

7. The two-fluid nozzle of claim 4, wherein the arcuate edge is formed of metal and the second fluid nozzle head is formed of polymer, the second fluid nozzle head being overmolded on the arcuate edge.

8. The two-fluid nozzle of claim 1, wherein the second fluid opening completely surrounds the first fluid opening.

9. The two-fluid nozzle of claim 1, wherein the second fluid opening is formed in the dome surface of the dome portion by an inner edge of a dome having a periphery, and the arcuate edge is spaced apart from the periphery on at least two sides.

10. The two-fluid nozzle of claim 1, wherein the first fluid opening and the second fluid opening are arc-shaped when viewed along the longitudinal plane and rectangular when viewed along the frontal plane.

11. A spraying device, comprising: The two-fluid nozzle according to any one of claims 1 to 10; A first fluid source, comprising a container fluidly connected to the two fluid nozzles; and A second fluid source is fluidly connected to the two fluid nozzles.

12. The spraying device of claim 11, wherein the container is flexible and configured to be squeezed by the operator without leakage.

13. A method of using the spraying device according to claim 11, the method comprising: Attach the container to the two fluid nozzles; Place the two fluid nozzles in front of the substrate; The second fluid source is attached to the two fluid nozzles, wherein the second fluid source is configured to provide no more than 3 standard cubic feet of air per minute at 90 PSI, while achieving a 12-inch fan-shaped coating area at a distance of 8 inches from the substrate. Dispense the first fluid and the second fluid; Atomize at least a portion of the first fluid to produce a flat fan-shaped pattern of atomized fluid; as well as The substrate is coated with the atomized fluid.

14. A method for creating a flat fan-shaped spray using the spraying device according to claim 11, the method comprising: Dispense the second fluid from the outlet of the second fluid passage; A negative pressure is generated at the first fluid opening; as well as The first fluid is dispensed and atomized from the first fluid opening without using an air horn for shaping.

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