Single-fluid nozzle and sprayer equipped with same

Abstract

To provide a single-fluid nozzle capable of controlling liquid to have a predetermined grain size and spraying the liquid.MEANS FOR SOLVING THE PROBLEM: A single-fluid nozzle 1 includes: a body 10; a pressure liquid coupling part 18 provided in one end of the body 10; a liquid passage extending from the pressure liquid coupling part; a nozzle tip end part 14 provided in the one end of the body; at least two tip end flow path parts 141, 142 provided in the nozzle tip end part 14 and connected with the liquid passage; and a spray outlet 21 in which liquids sprayed from the at least two tip end flow path parts 141, 142 collide each other to be atomized and sprayed to the outside.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a one-fluid nozzle and a sprayer including the same. [Background technology]

[0002] Airless single-fluid nozzles are used to spray liquids from containers (e.g., water, beauty serums, disinfectants, disinfectant ethanol solutions, medicinal liquids, etc.) using push-type sprays, trigger-type sprays, liquid surface pressurization sprays, and aerosol (propellant) sprays. Patent Document 1 discloses a nasal spray nozzle used with a drug container such as a syringe to deliver liquid substances such as medicines or vaccines to the nasal passages. Patent Document 2 discloses a nasal spray device for delivering a metered dose of a drug formulation to the nasal cavity. Patent Document 3 discloses a disposable drug administration device. None of Patent Documents 1 to 3 mention controlling the particle size of the spray in an airless spray. Patent Document 4 discloses a fluid injection nozzle having a long fluid injection groove formed in the radial direction of the tip in a state that it communicates with a flow path, and a structure in which fluids coming out of a pair of divided flow paths collide at 180 degrees. Patent Document 4 aims to make the flow rate distribution of the injection pattern uniform so that it can be used for cooling, cleaning, painting, chemical spraying, and defoaming of steel plates, but does not mention controlling the particle size of the spray. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4632510 [Patent Document 2] Patent No. 6023247 [Patent Document 3] Utility Model Registration No. 3136169 [Patent Document 4] Patent No. 4447726 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a one-fluid nozzle that can spray a liquid while controlling the droplet size to a predetermined size. Another object of the present invention is to provide a sprayer equipped with the single-fluid nozzle. [Means for solving the problem]

[0005] The one-fluid nozzle (1) of the present invention is A main body (10), a pressurized liquid connection (18) provided at one end of the body; a liquid passage extending from the pressure connection part (which may be at least one donut-shaped passage or a linear passage (11, 12, 13)); a nozzle tip portion (14) provided at one end of the main body; At least two tip flow path portions (141, 142) provided at the nozzle tip portion (14) and connected to the liquid passage; a spray outlet (21) through which liquids sprayed from the at least two tip flow passage portions (141, 142) collide with each other to be atomized and sprayed to the outside; Equipped with. An intermediate passage section (which may be at least one passage having a doughnut-shaped cross section, or at least two linear intermediate passages (151, 152)) may be provided between the liquid passages (11, 12) and the at least two tip flow path sections (141, 142). The one-fluid nozzle (1) is A cap portion (20) may be provided that covers the outer surface of the nozzle tip portion (14), covers the grooves of the at least two tip flow path portions (141, 142) to form flow paths, and forms a space for the spray outlet (21).

[0006] The nozzle tip (14) may have a flat top surface (144), or the flat surface (144) may have a recess (145). The at least two tip flow channel portions (141, 142) may be arranged opposite to each other and extend toward the center of the spray outlet. The cross-sectional shapes of the flow paths of the at least two tip flow path portions (141, 142) may be triangular, rectangular, base-shaped, semicircular, or circular. The cross-sectional shapes of the flow paths of the straight paths (11, 12) and the straight intermediate paths (151, 152) may be triangular, rectangular, base-shaped, semicircular, or circular. The spray outlet (21) may have a circular shape when viewed in a cross section perpendicular to the spray direction, or a trapezoidal shape (longer side is the spray tip) or a trumpet shape when viewed in a cross section in the spray direction. The flow paths of the at least two tip flow path portions (141, 142) may have the same cross-sectional area, or the cross-sectional area proximal to the spray outlet may be smaller than the cross-sectional area distal to the spray outlet. The cross-sectional area of ​​the straight intermediate passages (151, 152) may be smaller than the cross-sectional area of ​​the straight passages (11, 12), and the cross-sectional area of ​​the tip passages (141, 142) may be even smaller. The liquid passage portion may have a large diameter liquid passage portion (13) extending from the pressure connection portion (18), and first and second small diameter straight passages (11, 12) branching off from the large diameter liquid passage portion. The nozzle tip may have, for example, two, three, or four tip flow path portions (141, 142). In the case of three, the flow path portions may be arranged at 120-degree intervals, and in the case of four, the flow path portions may be arranged at 90-degree intervals. The jet collision angle (α) formed by the tip flow channel portions (141, 142) may be, for example, 75 degrees or more and 150 degrees or less. The shortest distance (d) between the tip ends of the openings of the tip flow channel sections (141, 142) is, for example, 0.3 mm or more and 2.0 mm or less.

[0007] When the cross-sectional shape of the flow path of the tip flow path portion (141, 142) is triangular, the base is 0.2 mm or more and 0.6 mm or less, and the vertical height from the base is 0.1 mm or more and 0.3 mm or less (i.e., the cross-sectional area is 0.01 mm 2 More than 0.09mm 2 If the cross-sectional shape is rectangular, the base is 0.15 mm or more and 0.3 mm or less, and the vertical height from the base is 0.1 mm or more and 0.3 mm or less (i.e., the cross-sectional area is 0.015 mm 2More than 0.09mm 2 Examples include: The diameter of the circular opening of the spray outlet is, for example, 0.4 mm or more and 1.5 mm or less.

[0008] The cross-sectional area of ​​the cross-sectional shape of the flow path of the tip flow path portion (141, 142) is 0.01 mm 2 More than 0.09mm 2 When the above ratio is set to the above, the average spray particle diameter (SMD value) can be controlled to 18 μm or more and 45 μm or less. The cross-sectional area of ​​the cross-sectional shape of the flow path of the tip flow path portion (141, 142) is 0.01 mm 2 More than 0.03mm 2 When the SMD value is set to 18 μm or more and 25 μm or less, the spray impingement angle (α) may be set to, for example, 90 degrees or more and 150 degrees or less, 100 degrees or more and 150 degrees or less, or 120 degrees or more and 150 degrees or less. The cross-sectional area of ​​the cross-sectional shape of the flow path of the tip flow path portion (141, 142) is 0.03 mm 2 Exceeds 0.09mm 2 When the SMD value is set to 75° or more and 90° or less, the average spray particle diameter (SMD value) can be controlled to be more than 25 μm and not more than 45 μm. In this case, the spray collision angle (α) may be set to, for example, 75° or more and 90° or less, or 75° or more and 100° or less.

[0009] Another inventive atomizer (100) comprises: The one-fluid nozzle (1), a container (40) connected to the pressurized liquid connection portion (18) of the one-fluid nozzle; a pressurizing means (42) for applying pressure to the liquid contained in the container and sending it to the one-fluid nozzle; Equipped with. The pressurizing means may be a plunger (in this case, the container is a syringe), a liquid surface pressurizing structure, or an aerosol structure. The pressurizing means may be a syringe pump device that pushes a plunger with a motor. The pressurizing means may be driven manually. The sprayer may be disposable and the container may already contain the liquid.

[0010] The liquid is not particularly limited, but is preferably a liquid having a viscosity of 100 cP or less at 20°C, and examples thereof include water, ionized water, cosmetic liquids such as moisturizers, beauty lotions, and skin lotions, pharmaceutical liquids, disinfectant liquids, antiseptic liquids, and other chemical liquids, paints, fuel oils, coating agents, solvents, resins, and the like.

[0011] The spray amount is the amount of liquid contained in the container (almost the entire amount), and is exemplified as 0.3 ml to 80 ml depending on the application. [Brief explanation of the drawings]

[0012] [Figure 1A] FIG. 2 is a cross-sectional side view of the single-fluid nozzle. [Figure 1B] FIG. 10 is a cross-sectional side view of a single-fluid nozzle according to another embodiment. [Figure 2] FIG. 10 is a diagram illustrating a jet collision angle α. [Figure 3A] FIG. 10 is a diagram illustrating the shape (groove) of the flow path of the tip flow path portion (141, 142). [Figure 3B] 10A and 10B are diagrams illustrating the shape (grooves) of the flow paths of the tip flow path portions (141, 142) of another embodiment. [Figure 4] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] (Embodiment 1) The single-fluid nozzle 1 will be described with reference to FIGS. 1A to 3A. The single-fluid nozzle 1 comprises a main body 10, a pressurized liquid connection part 18 provided at one end of the main body 10, two first and second linear passages 11, 12 with circular cross sections extending from the pressurized liquid connection part 18, and a nozzle tip part 14 provided at the other end of the main body 10. The nozzle tip portion 14 is provided with first and second straight intermediate passages 151 and 152 connected to the first and second straight passages 11 and 12, respectively, and with first and second tip flow path portions 141 and 142 connected thereto. In this embodiment, the first straight passage 11, the first straight intermediate passage 151, and the first tip flow path portion 141 form one liquid passage, and the second straight passage 12, the second straight intermediate passage 152, and the second tip flow path portion 142 form one liquid passage. The first and second tip flow channel portions 141, 142 are disposed at an interval of 180 degrees and are formed to face each other. In this embodiment, the jet collision angle α is, for example, 90 degrees, as shown in FIG.

[0014] The outer surface of the nozzle tip portion 14 is covered with a cap portion 20. In this embodiment, the first and second linear intermediate passages 151, 152 are formed as triangular grooves in the nozzle tip portion 14, and the cap portion 20 serves as a lid to form the passage portions. Also, as shown in FIG. 3A, the first and second tip flow passage portions 141, 142 are formed as triangular grooves in the nozzle tip portion 14, and the cap portion 20 serves as a lid to form the respective passage portions. The AA cross section is located proximal to the top surface and has a triangular cross section (see (b)). The BB cross section is located distal to the top surface and has a base-like cross section (see (c)). The cross-sectional area gradually decreases from the base-like to the triangular shape to adjust the internal pressure and discharge pressure. The top surface of the nozzle tip portion 14 forms a flat surface 144. The diameter of the flat surface 144 is the same as the shortest distance d between the tips of the openings.

[0015] FIG. 3B shows an example of the nozzle tip 14 of another embodiment. A recess 145 is provided in the flat portion 144. The recess 145 is a conical depression. The diameter φ of the cone is smaller than the shortest distance d, but may be the same as the shortest distance d in another example. The jet impingement angle α is, for example, 90 to 150 degrees. The CC cross section has a triangular cross section (see (b)).

[0016] The cap portion 20 is formed with an ejection outlet 21 , and the liquids ejected from the first and second tip flow path portions 141 , 142 collide with each other to atomize and are sprayed from the spray outlet 21 .

[0017] (Another embodiment) Figure 1B shows another embodiment of the single-fluid nozzle 1. The same reference numerals have the same functions as those in the above configuration, and different functions will be explained below. A large-diameter liquid passage section 13 extends from a pressure connection section 18. First and second straight passages 11 and 12, each with a smaller diameter, branch off from this large-diameter liquid passage section 13 to the left and right in the figure. The first and second straight passages 11 and 12 are shorter in length than the passages in Figure 1A.

[0018] (Embodiment 2) The sprayer 100 will be described with reference to FIG. The sprayer 100 includes a single-fluid nozzle 1, a syringe 40 connected to the pressurized liquid connection part 18 of the single-fluid nozzle 1, and a plunger 42 that applies pressure to the liquid contained in the syringe 40 and sends the liquid to the single-fluid nozzle 1. A rubber stopper 421 may be provided at the tip of the plunger. The pressurized liquid connection part 18 and the tip 41 of the syringe 40 are connected by a luer lock joint, but this is not limitative. The plunger 42 may be operated manually or may be driven by a motor.

[0019] <Example> A spray test was conducted using purified tap water with the syringe-shaped sprayer 100. (1) Spray performance of single-fluid nozzle Spray volume (volume in container): 1 ml (1 ml syringe) Average particle diameter (SMD): 20μm Jet collision angle α of the two tip flow passage sections (141, 142): 120 degrees, 100 degrees, 90 degrees (3 types) Cross-sectional area of ​​the flow path of the tip flow path section (141, 142): AA section (proximal tip) 0.015mm 2 AA cross section (proximal to the tip) is triangular, with a base of 0.2 mm and a vertical height of 0.1 mm from the base. The shortest distance d between the opening tips of the tip flow passage sections (141, 142): 0.78 mm, 0.86 mm, 0.89 mm (corresponding to the above-mentioned jet collision angle α, respectively) (2) Spray performance of the three two-fluid nozzles in the second nozzle unit Spray volume (volume in container): 1 ml (1 ml syringe) Average particle diameter (SMD): 42μm Jet collision angle α of the two tip flow passage sections (141, 142): 90 degrees Cross-sectional area of ​​the flow path of the tip flow path section (141, 142): AA section (proximal tip) 0.03 mm 2 AA cross section (proximal to the tip) is triangular, with a base of 0.4 mm and a vertical height from the base of 0.15 mm The shortest distance d between the opening tips of the tip flow passage sections (141, 142): 0.78 mm, 0.86 mm, 0.89 mm (corresponding to the above-mentioned jet collision angle α, respectively) [Explanation of symbols]

[0020] 1 Single-fluid nozzle 10 Main Unit 11 First straight passage 12 Second straight passage 14 Nozzle tip 141 First tip flow channel section 142 Second tip flow channel section 151 First linear intermediate passage section 152 Second linear intermediate passage section 18 Pressurized fluid connection 20 Cap part 21 Spray outlet 100 sprayer α Injection impact angle

Claims

1. The main body and a pressurized liquid connection portion provided at one end of the main body; a fluid passageway extending from the pressurized fluid connection; a nozzle tip provided at one end of the main body; at least two linear tip flow path portions provided at the nozzle tip portion and connected to the liquid passage; a spray outlet through which liquids sprayed from the at least two linear tip flow passage portions collide with each other to be atomized and sprayed to the outside; Equipped with The jet collision angle (α) formed by the at least two tip flow path portions is 90 degrees or more and 150 degrees or less. The shape of the spray outlet is circular when viewed in a cross section perpendicular to the spray direction, The flow paths of the at least two straight tip flow path portions have a cross-sectional area proximal to the spray outlet that is smaller than the cross-sectional area distal to the spray outlet. Single-fluid nozzle.

2. The nozzle tip has a flat portion on its top surface, and / or the shape of the spray outlet is trapezoidal (the long side is the spray tip) or trumpet-shaped when viewed in cross section in the spray direction. The one-fluid nozzle according to claim 1 .

3. The cross-sectional area of ​​the cross-sectional shape of the flow path of the tip flow path portion is 0.01 mm ２ More than 0.09 mm ２ The single-fluid nozzle according to claim 1 or 2, wherein the average spray particle diameter (SMD value) is 18 μm or more and 45 μm or less when the following is true:

4. The one-fluid nozzle according to claim 1 or 2; a container connected to the pressurized liquid connection portion of the one-fluid nozzle; a pressurizing means for applying pressure to the liquid contained in the container and sending the liquid to the one-fluid nozzle; A sprayer comprising:

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