WO2006112357A1 - Mesh nozzle for sprayer and sprayer - Google Patents

Abstract

A mesh nozzle (13) for a sprayer, comprising a plurality of through holes (80) of an optimum shape to increase a medical treatment efficiency by increasing the atomized amount of a chemical liquid by the sprayer. The mesh nozzle is used for atomizing the chemical liquid. The through holes (80) of the mesh nozzle (13) for the sprayer is formed in a tapered shape convergent toward its outlet face (13A) side, and a cone angle (θ1) on the outlet face (13A) side is 40° or higher.

Description

 Specification

 Nebulizer mesh nozzle and nebulizer

 Technical field

 [0001] The present invention relates to a mesh nozzle for a sprayer and a sprayer, and more specifically, a sprayer that is used to atomize a chemical solution in a sprayer for atomizing and ejecting the chemical solution and has a plurality of through holes. The present invention relates to a mesh nozzle and a sprayer having the mesh nozzle.

 Background art

 [0002] Nebulizers used for the treatment of respiratory diseases are required to have the ability to efficiently reach the target affected area in order to improve the therapeutic effect. The sprayed drug particles can reach the bronchi, the bronchioles behind them, and even the alveoli if the particle size is reduced. Moreover, the therapeutic effect can be enhanced by securing a sufficient spray amount. Therefore, in order to improve the performance of the sprayer, it is necessary to reduce the spray particle size and increase the spray amount.

[0003] In a sprayer having a mesh nozzle, the chemical solution is sprayed through the mesh nozzle. Therefore, the mesh nozzle is an important member that has a great influence on the particle diameter and spray amount of the chemical liquid to be sprayed. In order to reduce the spray particle diameter, it is effective to reduce the outlet diameter of the mesh nozzle. However, simply reducing the outlet diameter increases the resistance to chemical discharge (hereinafter referred to as “discharge resistance”), resulting in a decrease in the amount of spray and the overall therapeutic effect. Therefore, in order to improve the spray characteristics of the mesh nozzle, it is necessary not only to reduce the outlet diameter of the mesh nozzle, but also to optimize the shape of the holes and maintain a sufficient spray amount. On the other hand, if the mesh nozzle is made thinner, the discharge resistance becomes smaller and the spray amount can be increased. However, in that case, if the mesh nozzle does not have sufficient rigidity, the mesh nozzle itself will bend, so that sufficient pressure cannot be applied to the chemical solution filling each hole, and the spray amount may decrease. Therefore, securing the rigidity of the mesh nozzle is one of the issues for improving the spray characteristics of the mesh nozzle. [0004] As a cross-sectional shape of the through hole of the mesh nozzle, for example, a parabolic shape has been proposed. As a result, fluid resistance can be reduced and spray efficiency is improved (Nobuya Tanaka, 2 others, “Ultra-small mesh nebulizer”, OMRON TECHNICS, 2002, Vo 1.42 No.2, pl71-174 ( Non-patent literature 1)). In addition, a taper having a tapered cross section or a stepped cross section is proposed from both sides of the mesh nozzle toward the center of the thickness. As a result, even if the foreign matter is clogged in the hole, if the mesh nozzle is used with the force applied, the foreign matter is blown away, so that the clogging can be easily eliminated (Japanese Patent No. 279001-4 (Japanese Patent Laid-Open No. 7-80369)). Publication (Patent Document 1))). In addition, a method for machining mesh holes in which the cross-sectional shape of the holes is stepped or smooth by laser irradiation has been proposed (Japanese Patent Laid-Open No. 7-1172 (Patent Document 2), Kazuhito Nakamura, “Ultra-fine drilling of ceramic materials by excimer laser”, IEEJ Transaction E, 1997, 117 卷 1, pl5-19 (non-patent document 2)).

 Patent Document 1: Japanese Patent No. 2790014 (Japanese Patent Laid-Open No. 7-80369)

 Patent Document 2: JP-A-7-1172

 Non-Patent Document 1: Shinya Tanaka, 2 others, "Ultra-small mesh nebulizer", OMRON TEC HNICS, 2002, Vol.42 No.2, pl71-174

 Non-Patent Document 2: Kazuhito Nakamura, “Ultra Fine Hole Machining of Ceramic Materials by Excimer Laser”, IEEJ Transactions E, 1997, 117、1, pl5- 19

 Disclosure of the invention

 Problems to be solved by the invention

[0005] However, the shape of the mesh nozzle through-hole proposed in the above-mentioned document is not a result of detailed examination of the optimum shape for improving the spray amount. Therefore, in order to improve the therapeutic effect by increasing the amount of chemical sprayed by the nebulizer

Further investigation was necessary on the shape of the through-hole.

[0006] In addition, the nebulizer having a mesh nozzle is a medical device, and it is desirable that the mesh nozzle be replaced in a short period of time and kept clean because of the property of directly touching the chemical solution. Therefore, in order to enable short-term replacement, it is also an issue to reduce the cost of the mesh nozzle. [0007] In order to reduce the discharge resistance, a measure to reduce the thickness of the mesh nozzle is taken. However, the mesh nozzle with a small thickness becomes insufficient in rigidity, or if the rigidity is insufficient, the mesh nozzle itself will bend, so that sufficient pressure cannot be applied to the chemical that fills each hole, and the amount of spray is reduced. descend. Therefore, it was necessary to study a structure to ensure the rigidity of the mesh nozzle. In particular, resin mesh mesh nozzles that can be manufactured at low cost are generally used and have lower rigidity than metal mesh nozzles, and thus securing rigidity is a problem.

 [0008] Accordingly, one object of the present invention is to provide a mesh nozzle for a nebulizer that can improve the therapeutic effect by having an optimal through-hole shape for increasing the spray amount of a chemical solution. .

 [0009] Another object of the present invention is to provide a mesh nozzle for a sprayer that can be replaced in a short period of time by reducing the manufacturing cost of the mesh nozzle for the sprayer and can keep the mesh nozzle clean. .

 [0010] Still another object of the present invention is to have a structure that can secure sufficient rigidity even when the mesh nozzle is thinned, thereby increasing the spray amount of the chemical solution by the sprayer and improving the therapeutic effect. An atomizer mesh nozzle is provided.

 [0011] Still another object of the present invention is to provide a nebulizer having an improved therapeutic effect by having the mesh nozzle.

 Means for solving the problem

 [0012] A mesh nozzle for an atomizer according to one aspect of the present invention is used for atomizing a chemical liquid in an atomizer for atomizing and ejecting the chemical liquid and has a plurality of through holes. It is a mesh nozzle, Comprising: The through-hole has the taper shape which becomes narrow in the exit surface side of a mesh nozzle. The taper angle of the through hole on the exit surface side is 40 degrees or more.

[0013] As a result of intensive studies on the shape of the through hole of the mesh nozzle, the present inventor has increased the amount of spray per through hole by increasing the taper angle on the outlet surface side of the through hole, and the taper. The inventors have found that the spray amount increases rapidly when the angle is 40 degrees or more, and have arrived at the present invention. Therefore, a mesh nozzle for a sprayer according to one aspect of the present invention According to this, the amount of spray per through hole can be increased. As a result, it is possible to efficiently reach the affected part such as a patient with a respiratory disease and improve the therapeutic effect.

 [0014] Further, the atomizer mesh nozzle according to another aspect of the present invention is used for atomizing a chemical solution in a sprayer for atomizing and ejecting the chemical solution, and has a plurality of through holes. In the nozzle, the through hole has a pyramid shape.

 [0015] Compared to a mesh nozzle having a through-hole having a curved surface such as a conical shape, a mesh nozzle having a pyramid-shaped through-hole formed only of a flat surface is easy to manufacture a mold or the like. is there. Therefore, according to the mesh nozzle in another aspect of the present invention, the manufacturing cost of the mesh nozzle can be reduced. For this reason, the mesh nozzle in another aspect of the present invention is suitable for short-term replacement, and the mesh nozzle can be kept clean, so that the patient can use it with peace of mind. A nebulizer with a mesh nozzle is a medical device, and it is highly desirable that the mesh nozzle be replaced in a short period of time because of its nature of direct contact with chemicals.

 [0016] Further, the pyramid has a larger surface area per volume than the cone. Therefore, in order to reduce the loss of discharge pressure due to friction, it is generally considered that the shape of the mesh nozzle through-hole should be conical rather than pyramid-shaped. However, as a result of a detailed study of comparing the pyramidal through hole and the conical through hole, the present inventor has found that the fluid discharge pressure in the mesh nozzle having the pyramidal through hole is conical. It was found that there was almost no difference compared with the discharge pressure of a mesh nozzle having through holes. Therefore, according to the mesh nozzle in another aspect of the present invention, it is possible to provide an inexpensive mesh nozzle that can secure an amount of spray that is comparable to a mesh nozzle having a conical through hole. Accordingly, as described above, the mesh nozzle can be replaced in a short time, and the mesh nozzle can be kept clean.

[0017] In addition, a spray nozzle for a sprayer according to still another aspect of the present invention is used for atomizing a chemical liquid in a sprayer for atomizing and spraying the chemical liquid, and has a plurality of through holes. This is a mesh nozzle. The through hole has a tapered shape that becomes narrower on the outlet face side of the mesh nozzle. Furthermore, the through hole is on the exit surface side. It has a first taper angle and has a half-folded shape having a second taper angle smaller than the first taper angle on the inlet surface side of the mesh nozzle.

 [0018] As a result of detailed examination of the cross-sectional shape of the through hole, the present inventor depends on the taper angle on the outlet surface side of the through hole, and hardly changes even if the taper angle on the inlet surface side is reduced. I found out. Therefore, according to the atomizer mesh nozzle in still another aspect of the present invention, the diameter of the through hole can be reduced while sufficiently ensuring the taper angle on the outlet surface side of the through hole. The pitch between each other can be reduced, and the spray amount can be increased as a whole. As a result, it is possible to efficiently reach the affected part such as a patient with a respiratory disease, and the therapeutic effect can be improved.

 [0019] Preferably, in the mesh nozzle for a sprayer according to the above-mentioned further aspect, the through-hole has a folded conical shape!

 [0020] Thereby, since the conical through hole has a small surface area, it is possible to reduce the loss of discharge pressure due to friction.

 [0021] Preferably, in the mesh nozzle for a sprayer according to the above-mentioned further aspect, the through hole has a bent pyramid shape.

 [0022] Thereby, while reducing the manufacturing cost of the mesh nozzle for the sprayer, it is possible to secure a spray amount that is almost inferior to the conical shape!

 [0023] In the atomizer mesh nozzle according to the still another aspect described above, preferably, the through hole is formed in the portion having the second taper angle, and is formed in a columnar shape and in the portion having the first taper angle. It has a conical shape!

 [0024] This makes it possible to reduce the surface area of the through-hole of the mesh nozzle for the sprayer, and thus it is possible to reduce the loss of the discharge pressure due to friction. Further, in the cylindrical portion, the discharge direction of the chemical liquid and the side wall of the through hole of the mesh nozzle are parallel, so that the discharge pressure loss due to friction can be reduced.

[0025] In the atomizer mesh nozzle according to still another aspect described above, preferably, the through hole has a prismatic shape in a portion having the second taper angle, and a pyramidal shape in the portion having the first taper angle. Have a shape! [0026] With this, it is possible to ensure spray characteristics that are almost the same as when the inlet face side has a circular column shape and the outlet face side has a conical shape, while reducing the manufacturing cost of the atomizer mesh nozzle. Further, in the prism portion, the discharge direction of the chemical liquid and the through hole side wall of the mesh nozzle are parallel to each other, and the loss of discharge pressure due to friction can be reduced.

 [0027] Preferably, in the mesh nozzle for sprayer according to the other aspect described above and still another aspect, the taper angle of the through hole on the outlet face side of the mesh nozzle is 40 degrees or more. Thereby, the spraying amount per through-hole can be increased.

 [0028] In the above-described atomizer mesh nozzle in each aspect, preferably, the mesh nozzle has a grid-like reinforcing structure.

 [0029] In order to reduce the discharge resistance, a measure to reduce the thickness of the mesh nozzle is taken. However, the mesh nozzle with a small thickness becomes insufficient in rigidity, and if the rigidity is insufficient immediately, the mesh nozzle itself will bend. Therefore, sufficient pressure cannot be applied to the chemical solution filling each hole, and the spray amount decreases. As a result of intensive studies, the present inventor has found that by adding a grid-like reinforcing structure to the mesh nozzle, it is possible to improve the rigidity without increasing the thickness of the mesh nozzle and increase the spray amount. I came up with an invention. Therefore, according to this atomizer mesh nozzle, the spray amount can be increased. As a result, it is possible to efficiently reach the affected area such as a patient with a respiratory disease, and the therapeutic effect can be improved.

 [0030] A nebulizer mesh nozzle according to still another aspect of the present invention is used for atomizing a chemical solution in a nebulizer for atomizing and ejecting the chemical solution, and has a plurality of through holes. And having a lattice-like reinforcing structure.

 [0031] As a result, as described above, the rigidity of the atomizer mesh nozzle is improved, and the spray amount can be increased.

 [0032] Preferably, the mesh nozzle for the sprayer in each of the above-described aspects is made of a high-abrasion-resistant and a resin.

[0033] Thereby, the manufacturing cost can be kept lower than that of a commonly used metal mesh nozzle. Therefore, an inexpensive mesh nozzle can be provided. As a result, the mesh nozzle can be replaced in a short period of time and the mesh nozzle can be kept clean. it can. Moreover, the mesh nozzle for atomizers contacts a vibrating body. Therefore, when the wear resistance is low, the mesh nozzle may be worn, and the shavings may be mixed into the chemical. This shavings is sprayed with the chemical solution and it is not preferable to inhale it. Furthermore, this shavings can cause the mesh nozzle to become clogged. On the other hand, this problem can be solved by using a highly wear resistant resin material.

 [0034] Here, examples of the high abrasion-resistant resin include polyamide-based resin, polyester, syndiopolystyrene, polysulfone, polyethersulfone, polyetheretherketone, polyetherimide, polyamideimide, and PPS. (poly (phenylene sulfide)

 ), Epoxy, phenol, polyimide and the like.

 [0035] In the above-described atomizer mesh nozzle in each aspect, preferably, the mesh nozzle has a structure manufactured by resin molding.

 [0036] Thereby, the mesh nozzle can be manufactured at low cost, and an inexpensive mesh nozzle can be provided.

 [0037] From the viewpoint of workability in resin molding, high wear resistance! Among resins, for example, polysulfone, polyetheretherketone, PPS (poly (phenylene sulfide)) should be used as the material. Is preferred.

 [0038] A sprayer of the present invention is a sprayer having the above-described mesh nozzle for a sprayer.

 According to the sprayer of the present invention, a sufficient spray amount can be ensured even if the diameter of the outlet of the through hole of the mesh mesh nozzle is reduced in order to reduce the particle diameter of the sprayed chemical liquid. Therefore, the active ingredient contained in the drug solution can efficiently reach the target affected area, and the therapeutic effect can be improved. Further, according to the sprayer of the present invention, the manufacturing cost of the mesh nozzle can be kept low. Therefore, the mesh nozzle can be replaced in a short time, and the mesh nozzle can be kept clean.

 The invention's effect

As is clear from the above description, according to the mesh nozzle for a sprayer of the present invention, the therapeutic effect can be improved by having an optimal through-hole shape for increasing the spray amount of the chemical solution. A possible atomizer mesh nozzle can be provided. In addition, according to the mesh nozzle for a sprayer of the present invention, the manufacturing cost of the mesh nozzle for the sprayer can be reduced to reduce the production cost. It is possible to provide a mesh nozzle for a nebulizer that can be replaced at an initial stage and can keep the mesh nozzle clean. Furthermore, by having a structure capable of ensuring sufficient rigidity, it is possible to provide a nebulizer mesh nozzle capable of increasing the amount of the chemical liquid sprayed by the nebulizer and improving the therapeutic effect. Furthermore, according to the nebulizer of the present invention, it is possible to provide a nebulizer having an improved therapeutic effect by having the mesh nozzle. Furthermore, by having the mesh nozzle, a sprayer capable of keeping the mesh nozzle clean can be provided.

Brief Description of Drawings

FIG. 1 is a schematic cross-sectional view showing a configuration of a sprayer according to an embodiment of the present invention.

 FIG. 2 is a perspective view (a) and a partially enlarged view (b) showing the appearance of a mesh nozzle in the present embodiment.

 FIG. 3 is a schematic partial cross-sectional view showing a cross section passing through the outlet of the through hole of the mesh nozzle and parallel to the discharge direction.

 FIG. 4 is a schematic perspective view showing the shape of a through hole.

FIG. 5 is a schematic perspective view showing the shape of a through hole.

 FIG. 6 is a schematic partial cross-sectional view showing a cross section passing through the outlet of the through hole of the mesh nozzle and parallel to the discharge direction.

 FIG. 7 is a schematic perspective view showing the shape of a through hole.

FIG. 8 is a schematic perspective view showing the shape of a through hole.

FIG. 9 is a schematic perspective view showing the shape of a through hole.

FIG. 10 is a schematic perspective view showing the shape of a through hole.

FIG. 11 is a schematic plan view of a mesh nozzle.

 FIG. 12 is a schematic cross-sectional view of the mesh nozzle taken along line XII-XII in FIG.

 FIG. 13 is a scanning electron microscope (SEM) photograph of a cross section of a mesh nozzle that passes through the outlet of the through hole and is parallel to the discharge direction.

 FIG. 14 is a diagram showing the relationship between the taper angle of the through hole and the number of spray particles.

FIG. 15 is a schematic partial cross-sectional view showing the cross-sectional shape of the through-hole passing through the outlet of the through-hole targeted for simulation and parallel to the spraying direction. FIG. 16 is a diagram showing the relationship between the taper angle on the outlet surface side of the through hole and the discharge pressure obtained as a result of simulation.

 FIG. 17 is a diagram showing the magnitude of discharge pressure and discharge flow rate of a quadrangular pyramid-shaped through-hole when the conical-shaped through-hole is 100, obtained as a result of simulation.

 FIG. 18 is a scanning electron microscope (SEM) photograph showing the appearance of the produced mesh nozzle.

FIG. 19 is a schematic partial cross-sectional view showing a cross-sectional shape passing through the outlet of the through hole of the produced mesh nozzle and parallel to the discharge direction.

 FIG. 20 is a diagram showing the arrangement of through-hole openings on the inlet surface of the mesh nozzle.

 FIG. 21 is a schematic partial cross-sectional view showing a cross-sectional shape passing through the outlet of the through hole of the produced mesh nozzle and parallel to the discharge direction.

 FIG. 22 is a schematic plan view of a mesh nozzle used in the experiment.

 FIG. 23 is a schematic cross-sectional view of the mesh nozzle taken along the ridges in FIGS. 22 (a) and 22 (b). Explanation of symbols

 [0041] 1 sprayer, 10 atomizing member, 11 vibrator, 12 vibrator, 13 mesh nozzle, 13A mesh nozzle outlet surface, 13B mesh nozzle inlet surface, 13C mesh part, 13D reinforcement structure, formed along the outer edge of 13D Ribs, 13D ribs arranged in a grid, 14 mesh

 1 2

 Nozzle presser, 15 panel, 16 Atomization opening, 20 Flow path member, 21 Supply pipe, 21A Supply pipe supply part, 30 Supply member, 31 Storage tank, 31A Storage tank outer wall, 31 Β Storage Tank inner wall, 32 piston member, 32Α piston member flow path part, 40 liquid feeding member, 41 motor, 42 1st screw gear, 43 2nd screw gear, 44 presser lever, 80 through hole.

 BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, nebulizer 1 of the present embodiment includes an atomizing member 10, a channel member 20, a liquid supply member 30, and a liquid feeding member 40. The atomizing member 10 and the liquid supply member 30 are connected by a flow path member 20. Further, the liquid feeding member 40 is disposed so as to act on the liquid supply member 30 and to push out the chemical stored in the liquid supply member 30 to the flow path member 20. [0043] The liquid feeding member 40 has a motor 41, a first screw gear 42, a second screw gear 43, and a presser lever 44.

[0044] The first screw gear 42 is attached to the rotating shaft of the motor 41 and has a shaft-like first shape.

It fits in the 2 screw gear 43. The presser lever 44 meshes with the second screw gear 43 so as to be movable in the axial direction of the second screw gear 43.

The liquid supply member 30 has a liquid storage tank 31 and a piston member 32. The piston member 32 has a flow path portion 32A.

The liquid storage tank 31 is disposed so that the outer wall 31 A of the liquid storage tank 31 is in contact with the presser lever 44. The piston member 32 is fitted so as to come into contact with the inner wall 31B of the liquid storage tank 31, and is installed so that the liquid storage tank 31 can move relative to the piston member 32.

 The flow path member 20 has a liquid supply pipe 21. The liquid supply pipe 21 has a liquid supply part 21A at one end, and the liquid supply part 21A is connected to the atomizing member 10. Further, the liquid supply pipe 21 is connected to the flow path portion 32A of the piston member 32 at the other end. The atomizing member 10 includes a vibrator 11, a vibrating body 12, a mesh nozzle 13, a mesh nozzle presser 14, and a panel 15.

 [0048] The vibrator 11 is disposed at one end of the vibrating body 12, and the mesh nozzle 13 is disposed so as to contact the atomizing surface 12A at the other end. The region where the atomizing surface 12A and the mesh nozzle 13 are in contact with each other is disposed at a position where liquid can be supplied from the liquid supply portion 21A of the liquid supply pipe 21. The panel 15 presses the mesh nozzle 13 so as to lightly contact the atomizing surface 12A of the vibrating body 12. Thereby, the inlet surface 13B of the mesh nozzle 13 is in contact with the atomizing surface 12A of the vibrating body 12. The mesh nozzle presser 14 holds the panel 15.

[0049] Next, the operation of the sprayer 1 will be described. When the motor 41 is operated, the first screw gear 42 rotates, and the second screw gear 43 rotates accordingly. The presser lever 44 moves along the axial direction of the second screw gear 43 and presses the outer wall 31A of the liquid storage tank 31. As a result, the liquid storage tank 31 moves relative to the piston member 32, and the capacity of the liquid storage tank 31 decreases. Therefore, the chemical solution inside the liquid storage tank 31 flows into the liquid supply pipe 21 from the flow path portion 32A of the piston member 32. The infused chemical liquid is supplied to the liquid supply part 21 of the liquid supply pipe 21. A is supplied to the region where the atomizing surface 12A of the vibrating body 12 and the inlet surface 13B of the mesh nozzle 13 are in contact with each other through A. The supplied chemical liquid is atomized by the synergistic effect of the vibration of the vibrating body 12 and the mesh nozzle 13, and is ejected from the outlet surface 13 A of the mesh nozzle 13 through the atomizing portion opening 16.

 [0050] Next, the mesh nozzle of the present embodiment used in the sprayer 1 of Fig. 1 will be described. Referring to FIG. 2 (a), mesh nozzle 13 of the present embodiment has a plate-like outer shape. Further, referring to FIG. 2 (b), the mesh nozzle 13 of the present embodiment has a plurality of through holes 80.

 Referring to FIG. 3, through hole 80 of mesh nozzle 13 of the present invention has a tapered shape that becomes narrower on the exit surface 13 A side of the mesh nozzle. The taper angle Θ on the outlet surface 13A side of the through hole 80 is 40 degrees or more. The shape of the through hole 80 can be a conical shape as shown in FIG. 4, for example. Thereby, the spray amount per one can be increased in the through-hole 80, and the therapeutic effect can be improved.

[0052] The shape of the through hole 80 may be a pyramid as shown in FIG. Thereby, the manufacturing cost of the mesh nozzle 13 can be reduced, and the mesh nozzle 13 can be replaced in a short time. 5 has an inlet diameter Ll and an outlet diameter L2. Further, the taper angle Θ on the exit surface 13A side is ZaPb where the midpoints of the sides facing the bottom surface are a and b, respectively, and the apex is P. Figure 5 shows the case where the entrance and exit are square, but in a general polygon, a straight line passing through the center of gravity of the polygon and passing through the center of gravity and the midpoint of the side closest to the center of gravity is the side of the polygon. L1 and L2 are defined by the distance between two intersecting points. Also, the taper angle _θ is defined as aPb where the two points where the straight line intersects the polygon side are a and b, and the apex is P.

 [0053] In Fig. 3, the case where the wall surface of the through hole of the mesh nozzle is linear from the inlet loca to the outlet has been described. However, as shown in Fig. 6, the cross sectional shape of the through hole is the first on the outlet surface 13A side. And may have a folded shape having a second taper angle 0 smaller than the first taper angle 0 on the inlet surface 13B side of the mesh nozzle.

1 2

. Thereby, the pitch of through-holes can be made small. As a result, it is possible to increase the number of through-hole openings per unit area of the mesh nozzle surface, increasing the spray amount. Can be caro.

 [0054] The shape of the bent through-hole 80 may be a folded-down cone as shown in FIG. That is, a portion having the first taper angle 0 and a portion having the second taper angle 0

 1 2

 Both the minutes are conical. Thereby, the loss of the discharge pressure due to friction can be reduced. In addition, the shape of the through hole 80 that is folded may be a pyramid that is folded as shown in FIG. In other words, the portion having the first taper angle 0 and the second taper angle 0 are

 1 2 Both have a pyramid shape. As a result, it is possible to secure a spray amount that is almost the same as a conical shape while reducing the manufacturing cost of the mesh nozzle.

[0055] Further, the shape of the bent through-hole 80 is cylindrical as shown in Fig. 9 in the portion having the second taper angle and conical in the portion having the first taper angle. However, as shown in FIG. 10, the portion having the second taper angle has a prismatic shape, and the portion having the first taper angle has a pyramid shape! You may have. As a result, in the cylinder or prism portion, the discharge direction and the wall surface of the through hole 80 are parallel, and the loss of discharge pressure due to friction can be reduced. The taper angle Θ in each through-hole 80 shown in FIGS. 5 to 10 can be selected as appropriate, but is preferably 40 degrees or more. 8 and FIG. 10, the entrance diameter and the exit diameter of the pyramid portion of the through-hole 80 shown in FIG. 8 and FIG. Further, the taper angles 0 and Θ of the through hole 80 shown in FIG. 8 and the taper angle of the through hole 80 shown in FIG.

 1 2

 As in Fig. 5, the path angle Θ is determined by ZaPb, where the midpoints of the sides facing the bottom are a and b, respectively, and the apex is P.

[0056] In the mesh nozzle as described above, a reinforcing structure as described below may be provided. Referring to FIGS. 11 and 12, mesh nozzle 13 of the present embodiment has, for example, a disk-shaped mesh portion 13C having a plurality of through holes (not shown) and a reinforcing structure 13D. RU The reinforcing structure 13D has ribs 13D formed along the outer edge on the inlet surface 13B side of the mesh nozzle 13, and ribs 13D arranged in a lattice pattern. Mesh nozzle

 1 2

The 13 mesh portions 13C and the reinforcing structure 13D may be manufactured integrally, or may be separately manufactured and bonded together. The reinforcing structure can be provided as necessary when the mesh nozzle has insufficient rigidity. [0057] Further, the mesh nozzle of the present embodiment is made of a highly wear-resistant resin, for example, a polyimide resin. However, the mesh nozzle is polyamide-based resin, polyester, syndiopolystyrene, polysulfone, polyethersulfone, polyetheretherketone, polyetherimide, polyamideimide, PPS (poly (phenylene sulfide)), epoxy, phenol, etc. A high-abrasion resistant resin may be used as a material.

 [0058] Further, the mesh nozzle of the present embodiment may have a configuration manufactured by resin molding.

 [Example 1]

 Example 1 of the present invention will be described below. A mesh nozzle was made by forming a large number of through holes in the resin board, and an experiment was conducted to investigate the relationship between the taper angle of the through holes and the spray amount.

[0060] A conical through-hole was formed in a polyimide resin plate having a thickness of 50 m using an excimer laser cage (wavelength: 348 nm) to produce a mesh nozzle. There are four types of mesh nozzles with a 3 μm through-hole outlet diameter and differing only in taper angle.

[0061] Referring to FIGS. 13 (a) to (d), the produced mesh nozzles of (a) to (d) have conical shapes with taper angles of 22, 30, 43, and 70 degrees, respectively. A through hole (exit diameter 3 / zm) was formed.

 [0062] The inlet face side of the produced mesh nozzle was brought into contact with the atomizing surface of the vibrator, and the vibrator was vibrated by a horn vibrator. In addition, water was supplied to the area where the vibrating body and the mesh nozzle were in contact to atomize, and the number of spray particles was measured.

Referring to FIG. 14, when the through hole taper angle is increased, the number of spray particles per second per through hole tends to increase. In addition, the number of spray particles increased rapidly, especially around 40 degrees.

[0064] From this, in order to increase the number of spray particles per through hole, it is effective to increase the taper angle of the through hole, and in particular, it is effective to set it to 40 degrees or more. I understand.

[0065] On the other hand, in the case of conical through holes having different shapes, water is supplied to the inlet at a constant pressure. A simulation was performed for the total discharge pressure.

[0066] Referring to FIG. 15, assuming a conical or bent conical through hole shown in (a) to (e), discharge when water pressure of 50 MPa is applied to the inlet of each through hole. The pressure was simulated.

As a result, referring to FIG. 16, it was found that the discharge pressure at the outlet of the through hole increases as the taper angle on the outlet surface side of the through hole increases. This is consistent with the results of the above experiment. Moreover, the discharge pressure depends only on the taper angle on the outlet surface side of the through hole, and does not depend on the size of the inlet of the through hole and the taper angle on the inlet surface side.

[0068] From the above, it is possible to reduce the inlet of the through-hole while maintaining the discharge pressure by making the taper angle on the inlet surface side of the through-hole smaller than the taper angle on the outlet surface side. I got it. This shows that it is possible to increase the total spray amount by increasing the number of openings of the through holes on the surface of the mesh nozzle while maintaining the spray amount per through hole.

[0069] (Example 2)

 Example 2 of the present invention will be described below. A mesh nozzle with a quadrangular pyramid through hole and a mesh nozzle with a conical through hole were produced, and an experiment was conducted to compare the spray amount.

 [0070] In the same manner as in Example 1, a mesh nozzle having a large number of quadrangular pyramidal through holes and a mesh nozzle having a large number of conical through holes formed on a polyimide resin board. The inlet diameter, outlet diameter, and taper angle of the through holes formed in these two types of mesh nozzles are the same. The entrance surface side of the produced mesh nozzle was brought into contact with the atomizing surface of the vibrating body, and the vibrating body was vibrated by a horn vibrator. In addition, the vibrating body and the mesh nozzle were in contact with each other, water was supplied to the area to be atomized, and the spray amount was measured.

As a result, the spray amount of the mesh nozzle having a quadrangular pyramidal through hole was about 92% of the spray amount of the mesh nozzle having a conical through hole. From this, it was found that the mesh nozzle having a quadrangular pyramidal through-hole has spray characteristics almost inferior to those of the mesh nozzle having a conical through-hole. [0072] Referring now to FIG. 5, the entrance diameter and exit diameter of the through-holes in the shape of a quadrangular pyramid are defined as the lengths L1 and L2 of one side of the square that forms the entrance and exit of the through-holes, respectively. The In addition, the taper angle in the pyramid-shaped through-hole is defined as ZaPb with the midpoints of the opposite sides of the bottom as a and b and the apex as P.

 [0073] Next, the discharge pressure and discharge when water is supplied at a constant pressure to the inlets of the quadrangular pyramid through hole and the conical through hole having the same inlet diameter, outlet diameter, and taper angle. A simulation was conducted to compare the flow velocity with V.

 [0074] Referring to FIG. 17, the discharge pressure and discharge flow rate of the quadrangular pyramidal through hole with respect to the conical through hole were 90% and 95%, respectively. From the above, it is confirmed from this simulation result that the mesh nozzle having a quadrangular pyramid through-hole has almost the same spray characteristics as the mesh nozzle having a conical through-hole. f * i¾.

 [0075] On the other hand, a mesh nozzle was prepared by resin molding using polysulfone resin as a material, and an experiment was conducted to examine the spray characteristics.

Referring to FIG. 18, the mesh nozzle has a thickness of 63 m, and the through hole has a quadrangular pyramid shape with an outlet of 4 m square and an inlet force of S 73 m square. In addition, the entrance surface side and the lower side of the through hole of the upper cache nozzle in the photograph are the exit surface side.

[0077] The inlet face side of the produced mesh nozzle was brought into contact with the atomizing surface of the vibrating body, and the vibrating body was vibrated by a horn vibrator. In addition, water was supplied to the region where the vibrating body and the mesh nozzle were in contact to atomize, and the spray particle size and spray amount were measured.

As a result, the average particle size was 7 μm, and the spray amount was 0.25 mlZ. Since the average diameter of spray particles in a general sprayer is about 5 m and the spray amount is about 0.35 mlZ, it was found that sufficient spray characteristics can be obtained even with a mesh nozzle having a pyramidal through hole. .

 [0079] (Example 3)

Example 3 of the present invention will be described below. A mesh nozzle having a conical through hole and a mesh nozzle having a folded conical through hole were produced, and an experiment was conducted to compare the spray amount. Referring to FIG. 19, in both of the through holes, the outlet diameter of the through hole is 3 m, the taper angle on the outlet surface side is ₇₂ degrees, and the thickness of the mesh nozzle is ₅₀ . The conical through hole has an inlet diameter of 75 m. On the other hand, the tapered cone-shaped through hole has a taper angle changed at a position where the through hole outlet surface side force is 20 μm thick, and has an inlet diameter of 55 μm.

 Referring to FIG. 20, through holes are formed with the shortest distance between the entrance edges of adjacent through holes being 5 μm. As a result, the distance (pitch) between the centers of the openings of the through holes on the entrance surface was 80 μm for the conical through holes, and 60 μm for the half-broken conical through holes.

 [0082] The mesh nozzle was brought into contact with the inlet surface side of the mesh nozzle and the vibrating body was vibrated by a horn vibrator. In addition, water was supplied to the area where the vibrating body and the mesh nozzle were in contact to atomize, and the spray amount was measured.

 [0083] As a result, the mesh nozzle having a half-conical through hole having a half-broken shape had a spraying amount of 70% higher than that of the mesh nozzle having the through hole having a conical shape. Here, due to the difference in the pitch of the through holes, the number of through holes per unit area of the mesh nozzle surface is increased by about 78%. Therefore, it is considered that the amount of spray increased corresponding to the ratio of the number of through holes. From this, it was confirmed that increasing the number of through-holes by making the through-holes into a bent shape is effective in increasing the spray amount.

 [0084] (Example 4)

 Example 4 of the present invention will be described below. A mesh nozzle having a cylindrical shape on the inlet surface side and a conical shape on the outlet surface side and having a through hole and a V, mesh nozzle having a conical through hole are produced. The experiment which compares was conducted.

 Referring to FIG. 21, a mesh nozzle (b) having a through hole having a cylindrical shape on the inlet surface side and a conical shape on the outlet surface side is referred to as a mesh nozzle (a) having a conical through hole. This is a combination of mesh nozzles having cylindrical through holes of the same thickness. The mesh nozzle is made of polysulfone resin.

[0086] The inlet surface side of the mesh nozzle was brought into contact with the atomizing surface of the vibrating body, and the vibrating body was vibrated by a horn vibrator. In addition, water is applied to the area where the vibrating body and the mesh nozzle are in contact. It was made to atomize and the amount of spraying was measured.

 As a result, the spray amount of the mesh nozzle (b) having a through hole having a cylindrical shape on the inlet surface side and a conical shape on the outlet surface side is three times that of the mesh nozzle (a) having a conical through hole. It was. This indicates that the effect of improving the rigidity of the mesh nozzle is greater than the effect of increasing the discharge resistance by increasing the thickness. For this reason, when the thickness is increased for the purpose of improving the rigidity of the mesh nozzle, the shape of the through hole is a taper shape that is narrower on the outlet surface side, preferably a cylindrical shape on the inlet surface side. The fact that the side has a conical shape can be expected to increase the spray amount.

 [0088] (Example 5)

 Example 5 of the present invention will be described below. A mesh nozzle with a grid-like reinforcement structure and a mesh nozzle without it were made, and an experiment was conducted to compare the spray amount.

 Referring to FIGS. 22 and 23, mesh nozzle (a) having a reinforcing member has ribs surrounding the edge of the entrance surface and grid-like ribs. Both mesh nozzles have a square shape with a side of 4.3 mm square, and the thickness of the mesh part is 50 m. The rib has a width of 100 μm and a thickness of 200 μm.

 [0090] The inlet surface side of the mesh nozzle was brought into contact with the atomizing surface of the vibrating body, and the vibrating body was vibrated by a horn vibrator. Also, water was supplied to the area where the vibrating body and the mesh nozzle were in contact to atomize, and the spray amount was measured.

 As a result, the spray amount of the mesh nozzle having the reinforcing structure was three times the spray amount of the mesh nozzle without the reinforcing structure. Here, the rigidity of the mesh nozzle with the reinforcing structure is 10 times that of the mesh nozzle without the reinforcing structure. Therefore, it can be considered that the spray amount increased due to the improvement in rigidity by the reinforcing structure.

 [0092] Although the present embodiment and examples have been described with reference to the mesh nozzle made of resin, the mesh nozzle of the present invention is not limited to this, for example, metal The product may be made of ceramic.

[0093] The embodiments and examples disclosed herein are illustrative in all respects and should not be construed as being restrictive. The scope of the present invention is defined not by the above description but by the scope of the claims, and the meaning equivalent to the scope of the claims and all modifications within the scope are defined. Is intended to be included.

Industrial applicability

 A mesh nozzle and a sprayer for a sprayer according to the present invention are used for atomizing a chemical solution in a sprayer for atomizing and ejecting a chemical solution, and have a plurality of through holes, and the mesh nozzle. It can be applied particularly advantageously to sprayers with

Claims

The scope of the claims  [I] A nebulizer mesh nozzle (13) used for atomizing a chemical solution in the atomizer (1) for atomizing and ejecting the chemical solution and having a plurality of through holes (80). The through hole (80) has a tapered shape that becomes narrower on the outlet surface (13A) side of the mesh nozzle (13),  The atomizer mesh nozzle (13), wherein a taper angle (Θ) of the through hole (80) on the outlet face (13A) side is 40 degrees or more. [2] The mesh nozzle for a sprayer according to claim 1, having a lattice-like reinforcing structure (13D).  (13).  [3] The mesh nozzle for a sprayer according to claim 1, wherein the material is made of a highly wear-resistant resin. ) o  [4] The mesh nozzle for a sprayer (13) according to claim 3, wherein the mesh nozzle (13) has a configuration manufactured by a resin molding.  [5] A sprayer (1) having the mesh nozzle (13) for a sprayer according to claim 1.  [6] In a nebulizer (1) for atomizing and ejecting a chemical liquid, it is used for atomizing the chemical liquid and has a plurality of through-holes (80) and a mesh nozzle for a nebulizer (13) The atomizer mesh nozzle (13), wherein the through hole (80) has a pyramid shape. [7] The atomizer mesh nozzle (13) according to claim 6, wherein a taper angle (0) of the through hole (80) on the outlet surface (13A) side of the mesh nozzle (13) is 40 degrees or more. . [8] The mesh nozzle for a sprayer according to claim 6, which has a lattice-like reinforcing structure (13D).  (13).  [9] The mesh nozzle for a sprayer (13) according to claim 6, wherein the material is made of a highly wear-resistant resin. ) o  [10] The mesh nozzle for a sprayer (13) according to claim 9, wherein the mesh nozzle (13) has a structure manufactured by a resin molding.  [II] A sprayer (1) having the mesh nozzle (13) for a sprayer according to claim 6. [12] A nebulizer mesh nozzle (13) used for atomizing the chemical solution in the atomizer (1) for atomizing and ejecting the chemical solution and having a plurality of through holes (80). , The through hole (80) has a taper shape that becomes narrower on the outlet surface (13A) side of the mesh nozzle (13),  The through hole (80) has a first taper angle (Θ) on the outlet surface (13A) side, and the first taper angle on the inlet surface (13B) side of the mesh nozzle (13). For atomizers having a folded shape with a second taper angle (Θ) smaller than the angle (Θ)  2  Mesh nozzle (13).  [13] The atomizer mesh nozzle (13) according to claim 12, wherein the through hole (80) has a half-broken conical shape. [14] The atomizer mesh nozzle (13) according to claim 12, wherein the through hole (80) has a shape of a half-broken pyramid. [15] The through hole (80) is cylindrical in a portion having the second taper angle (Θ),  2  The atomizer mesh nozzle (13) according to claim 12, wherein the portion having the first taper angle (0) has a conical shape. [16] The through hole (80) has a prismatic shape in a portion having the second taper angle (Θ),  2  13. The atomizer mesh nozzle (13) according to claim 12, wherein the portion having the first taper angle (0) has a pyramid shape. [17] The atomizer mesh nozzle (13) according to claim 12, wherein the taper angle (0) of the through hole (80) on the outlet surface (13A) side of the mesh nozzle (13) is 40 degrees or more. . [18] The atomizer mesh nozzle (13) according to claim 12, wherein the mesh nozzle (13) has a lattice-like reinforcing structure (13D).  [19] The mesh nozzle (13) for a sprayer according to claim 12, wherein the material is made of a highly wear-resistant resin.  [20] The mesh nozzle for a sprayer (13) according to claim 19, wherein the mesh nozzle (13) has a structure manufactured by a resin molding.  [21] A sprayer (1) having the mesh nozzle (13) for a sprayer according to claim 12. [22] A nebulizer mesh nozzle (13) used for atomizing the chemical solution in the atomizer (1) for atomizing and ejecting the chemical solution and having a plurality of through holes (80). A mesh nozzle for a sprayer (13) having a grid-like reinforcing structure (13D). [23] The mesh nozzle for a sprayer (13) according to claim 22, wherein the material is made of a highly wear-resistant resin.  [24] The mesh nozzle for a sprayer (13) according to claim 23, wherein the mesh nozzle (13) has a configuration manufactured by a resin molding.  [25] A sprayer (1) having the mesh nozzle (13) for a sprayer according to claim 22.