JP2023058166A - Single-fluid nozzle and sprayer including the same - Google Patents

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

The present invention relates to a one-fluid nozzle and an atomizer provided therewith.

Airless single-fluid nozzles can spray liquids in containers (e.g., water, serum, disinfectants, sterilizing ethanol solutions, chemical solutions, etc.) with push-type sprays, trigger-type sprays, liquid-level pressurized sprays, and aerosol-type (jetting). It is used in sprays, etc.
US Pat. No. 5,300,002 discloses a nasal spray nozzle for use with a drug container, such as a syringe, to deliver liquid substances, such as drugs and vaccines, to the nasal passages. US Pat. No. 5,300,000 discloses a nasal spray device for delivering metered doses of drug formulations to the nasal passages. US Pat. No. 5,300,001 discloses a disposable drug delivery device. None of Patent Literatures 1 to 3 mention controlling the particle size of the spray in the airless system.
Japanese Patent Application Laid-Open No. 2002-200003 discloses a fluid ejection nozzle in which a fluid ejection groove extending in the radial direction of a tip portion is formed in communication with a flow path, and has a structure in which fluid emitted from a pair of divided flow paths collides at an angle of 180 degrees. is disclosed. In Patent Document 4, the purpose is to homogenize the flow rate distribution of the spray pattern so that it can be used for cooling, cleaning, painting, chemical spraying, and defoaming of steel plates, but it mentions controlling the particle size of the spray. do not have.

Patent No. 4632510 Patent No. 6023247 Utility Model Registration No. 3136169 Patent No. 4447726

SUMMARY OF THE INVENTION An object of the present invention is to provide a one-fluid nozzle capable of controlling and spraying liquid to a predetermined particle size.
Another object of the present invention is to provide a sprayer equipped with the one-fluid nozzle.

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

The top surface of the nozzle tip (14) may be a flat portion (144), or the flat portion (144) may be provided with a recess (145).
Said at least two tip channel portions (141, 142) may be in opposing arrangement and extend towards the center of said spray outlet.
The cross-sectional shape of the channel of the at least two tip channel portions (141, 142) may be triangular, rectangular, base-shaped, semi-circular, or circular. The cross-sectional shape of the flow paths of the straight passages (11, 12) and the straight intermediate passages (151, 152) may be triangular, rectangular, base-shaped, semi-circular, or circular.
The shape of the spray outlet (21) may be circular in a cross-sectional view perpendicular to the spraying direction, trapezoidal (the long side is the tip of the spray), or a trumpet-like shape in the cross-sectional view in the spraying direction.
The channels of said at least two tip channel portions (141, 142) may be of the same cross-sectional area and may be smaller in cross-sectional area proximal to said spray outlet than in cross-sectional area distal to said spray outlet.
The cross-sectional area of the flow passages of the straight intermediate passages (151, 152) is smaller than the cross-sectional area of the flow passages of the straight passages (11, 12), and the cross-sectional area of the flow passages of the tip flow passage portions (141, 142) is even larger. It can be small.
The liquid passage portion has a large diameter liquid passage portion (13) extending from the pressurized connection portion (18), and small diameter first and second linear passages (11, 12) branching from the large diameter liquid passage portion. You may have
For example, two, three, or four of the tip flow passages (141, 142) may be formed at the tip of the nozzle. In the case of three, the channel portions may be arranged at intervals of 120 degrees, and in the case of four, the channel portions may be arranged at intervals of 90 degrees.
A jet impingement angle (α) formed by the tip flow path portions (141, 142) may be, for example, 75 degrees or more and 150 degrees or less.
The shortest distance (d) between the tips of the openings of the tip channel portions (141, 142) is, for example, 0.3 mm or more and 2.0 mm or less.

When the cross-sectional shape of the channel of the tip channel 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 (that is, the cross-sectional area is 0.01 mm ² or more and 0.09 mm ² or less), and when 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 (that is, cross-sectional area of 0.015 mm ² or more and 0.09 mm ² or less).
The circular opening diameter of the spray outlet is, for example, 0.4 mm or more and 1.5 mm or less.

When 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 or more and 0.09 mm ² or less, the average spray particle diameter (SMD value) is 18 μm or more and 45 μm or less. can be controlled to
When the cross-sectional area of the cross-sectional shape of the flow path of the tip flow path part (141, 142) is 0.01 mm ² or more and 0.03 mm ² or less, the average spray particle size (SMD value) is 18 μm or more and 25 μm or less. You can control it. At this time, the injection collision 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.
When the cross-sectional area of the cross-sectional shape of the flow path of the tip flow path part (141, 142) exceeds 0.03 mm ² and is 0.09 mm ² or less, the average spray particle size (SMD value) exceeds 25 μm and 45 μm You can control: At this time, the injection collision angle (α) may be set to, for example, 75 degrees or more and 90 degrees or less, or 75 degrees or more and 100 degrees or less.

Another atomizer (100) of the present invention comprises:
the one-fluid nozzle (1);
a container (40) connected to the pressurized liquid connection (18) of the one-fluid nozzle;
a pressurizing means (42) for pressurizing the liquid contained in the container and sending it to the one-fluid nozzle;
Prepare.
The pressurizing means may be a plunger (in this case, the container is a syringe), a liquid level pressurizing structure, or an aerosol structure. The pressurizing means may be a syringe pump device that pushes the plunger with a motor. The driving source of the pressurizing means may be manual.
The nebulizer may be disposable and the container already filled with liquid.

The liquid is not particularly limited, but preferably has a viscosity of 100 cP or less at 20°C. chemicals, paints, fuel oils, coating agents, solvents, resins and the like.

The amount of spray is the amount of liquid contained in the container (substantially the total amount), and is exemplified by 0.3 ml to 80 ml depending on the application.

It is sectional drawing of the side view of a one-fluid nozzle. It is sectional drawing of the side view of the 1 fluid nozzle of another embodiment. It is a figure explaining injection collision angle (alpha). It is a figure explaining the shape (groove) of the flow path of a front-end|tip flow-path part (141, 142). It is a figure explaining the shape (groove) of the flow path of the front-end|tip flow-path part (141, 142) of another embodiment. It is an external view of a sprayer.

(Embodiment 1)
The one-fluid nozzle 1 will be described with reference to FIGS. 1A to 3A.
The one-fluid nozzle 1 includes a main body 10, a pressurized liquid connection portion 18 provided at one end of the main body 10, and two first and second linear passages 11 and 12 having circular cross sections extending from the pressure connection portion 18. and a nozzle tip portion 14 provided at the other end of the main body 10 .
The nozzle tip 14 has first and second straight intermediate passages 151 and 152 connected to the first and second straight passages 11 and 12, respectively, and first and second straight passages 151 and 152 connected thereto. Tip channel portions 141 and 142 are provided. In this embodiment, the first linear passage 11, the first linear intermediate passage 151, and the first tip channel portion 141 form one liquid passage, and the second linear passage 12 and the second linear intermediate passage 152 and the second tip channel portion 142 form one liquid channel.
The first and second tip channel portions 141 and 142 are arranged at an interval of 180 degrees and formed to face each other. Moreover, in this embodiment, as shown in FIG. 2, the injection collision angle α is, for example, 90 degrees.

The outer surface of the nozzle tip portion 14 is covered with a cap portion 20 . In this embodiment, as the first and second linear intermediate passages 151 and 152, grooves having a triangular cross section are formed in the nozzle tip portion 14, and the cap portion 20 serves as a lid to form passage portions. Further, as shown in FIG. 3A, grooves having a triangular cross section are formed in the nozzle tip portion 14 as the first and second tip channel portions 141 and 142, and the cap portion 20 serves as a lid to form each channel portion. be done. The AA cross section is located proximal to the top surface and has a triangular cross-sectional shape (see (b)). A BB cross section is a position distal to the top surface, and has a base-like cross-sectional shape (see (c)). The internal pressure and discharge pressure are adjusted by gradually decreasing the cross-sectional area from the base shape to the triangular shape. A 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.

FIG. 3B shows an example nozzle tip 14 of another embodiment. A concave portion 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 another example. The jet impingement angle α is, for example, 90 to 150 degrees. The CC section has a triangular cross-sectional shape (see (b)).

A spray outlet 21 is formed in the cap portion 20 , and the liquids sprayed from the first and second tip channel portions 141 and 142 collide with each other to be atomized and sprayed from the spray outlet 21 .

(another embodiment)
FIG. 1B shows a one-fluid nozzle 1 of another embodiment. The same reference numerals have the same functions as the above configuration, and different functions will be described. The large diameter liquid passage portion 13 extends from the pressurized connection portion 18 . From this large-diameter liquid passage portion 13, first and second linear passages 11 and 12 having smaller diameters branch off to the left and right in the drawing. The first and second straight passages 11, 12 are shorter in length than the passages of FIG. 1A.

(Embodiment 2)
The atomizer 100 will be explained using FIG.
The sprayer 100 includes a one-fluid nozzle 1, a syringe 40 connected to the pressurized liquid connection part 18 of the one-fluid nozzle 1, and a plunger that pressurizes the liquid contained in the syringe 40 and sends it to the one-fluid nozzle 1. 42. A rubber plug 421 may be provided at the tip of the plunger. Although the connection between the pressurized liquid connection portion 18 and the tip 41 of the syringe 40 is performed by a Luer lock joint, the connection is not limited to this. The plunger 42 may be manually operated or may be of a structure driven by a motor.

<Example>
A spray test was conducted using the syringe-shaped sprayer 100 using purified water obtained by purifying tap water.
(1) Atomization performance of single-fluid nozzle Amount of spray (amount of liquid in container): 1ml (1ml syringe)
Average particle size (SMD): 20 μm
Injection collision angle α of two tip flow passages (141, 142): 120 degrees, 100 degrees, 90 degrees (3 types)
Cross-sectional area of the channel of the tip channel part (141, 142):
AA cross section (proximal tip) 0.015 mm ²
AA section (proximal to the tip) is triangular with a base of 0.2 mm and a vertical height from the base of 0.1 mm.
The shortest distances d between the tip ends of the openings of the tip channel portions (141, 142): 0.78 mm, 0.86 mm, 0.89 mm (corresponding to the jet collision angle α)
(2) Atomization performance of the three two-fluid nozzles of the second nozzle unit Amount of spray (amount of liquid in container): 1ml (1ml syringe)
Average particle size (SMD): 42 μm
Jet impingement angle α of the two tip flow passages (141, 142): 90 degrees Cross-sectional area of the flow passage of the tip flow passages (141, 142):
AA cross section (proximal tip) 0.03 mm ²
AA 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 distances d between the tip ends of the openings of the tip channel portions (141, 142): 0.78 mm, 0.86 mm, 0.89 mm (corresponding to the jet collision angle α)

1 One Fluid Nozzle 10 Main Body 11 First Straight Passage 12 Second Straight Passage 14 Nozzle Tip 141 First Tip Flow Path 142 Second Tip Flow Path 151 First Straight Intermediate Passage 152 Second Straight Intermediate Passage 18 Pressurized liquid connection part 20 Cap part 21 Spray outlet 100 Sprayer α Spray impingement angle

Claims (4)

the main body;
a pressurized liquid connecting portion provided at one end of the main body;
a liquid passageway extending from the pressurized connection;
a nozzle tip provided at one end of the main body;
at least two tip channel portions provided at the nozzle tip portion and connected to the liquid passage;
a spray outlet through which the liquids sprayed from the at least two tip flow passages collide with each other to be atomized and sprayed to the outside;
comprising
One-fluid nozzle. 2. The one-fluid nozzle according to claim 1, wherein a jet impingement angle ([alpha]) formed by said at least two tip flow path portions is 75 degrees or more and 150 degrees or less. When the cross-sectional area of the cross-sectional shape of the flow path of the tip flow path part is 0.01 mm ² or more and 0.09 mm ² or less, the average spray particle size (MSD value) is 18 μm or more and 45 μm or less.
A one-fluid nozzle according to claim 1 or 2. A one-fluid nozzle according to claim 1 or 2;
a container connected to the pressurized liquid connection portion of the one-fluid nozzle;
pressurizing means for applying pressure to the liquid contained in the container and sending the liquid to the one-fluid nozzle;
comprising
nebulizer.

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