Fine mist generating nozzle

Abstract

To provide a fine mist generating nozzle that generates fine mist. [Solution] The present invention includes a gas nozzle, a mist nozzle, and a swirl flow forming body. The gas nozzle has a gas injection hole, a gas throttling hole connected to the gas injection hole, and a gas inlet hole connected to the gas throttling hole. The mist nozzle has a cylindrical pipe section that is inserted into the gas injection hole and forms an annular gas injection flow path between it and the gas injection hole, a truncated cone section that is inserted into the gas throttling hole and forms an annular gas throttling flow path between it and the gas throttling hole, and a cylindrical section that is inserted into the gas inlet hole and forms an annular gas inlet chamber between it and the gas inlet hole. The cylindrical pipe section has a mist injection hole from which mist is injected. The cylindrical section has a liquid inlet hole through which liquid is introduced and which is connected to the mist injection hole. The swirl flow forming body outputs gas into the gas inlet chamber and forms a swirl flow around the center line of the cylindrical section in the gas inlet chamber.

Description

[Technical Field]

[0001] The present invention relates to a fine mist generating nozzle that generates a fine mist. [Background technology]

[0002] Patent Document 1 discloses a spray nozzle as a technique for generating mist. The spray nozzle has an injection port and a gas supply flow path. The spray nozzle injects mist-like liquid from the injection port. The spray nozzle injects compressed gas from the gas supply flow path around the mist-like liquid injected from the injection port. The spray nozzle suppresses vortexes that occur around the injection port by injecting the compressed gas around the mist-like liquid injected from the injection port without coming into contact with the mist-like liquid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-131124 A Summary of the Invention [Problem to be solved by the invention]

[0004] Although Patent Document 1 can inject mist-like liquid from the injection port, it cannot further subdivide the mist-like liquid injected from the injection port to generate a fine mist.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide a fine mist generating nozzle capable of generating fine mist by dividing the mist of a sprayed liquid into smaller particles. [Means for solving the problem]

[0006] The present invention provides a gas nozzle having a gas nozzle body, a mist nozzle having a mist nozzle body, A gas guide body having a guide body and a plurality of gas guide holes through which gas flows, and a tube body and a plurality of fins a swirl flow forming body, the gas nozzle body being formed in a circular shape and having an opening on the surface of the gas nozzle body; dothe mist nozzle body has a gas injection hole having an injection port, a gas inlet hole that is arranged concentrically with the gas injection hole and into which a gas is introduced, and a gas throttling hole that is arranged concentrically with the gas injection hole and between the gas injection hole and the gas inlet hole, that is formed continuously with the gas injection hole and the gas inlet hole, and that is formed in a truncated cone with a diameter that gradually decreases from the gas inlet hole toward the gas injection hole, the mist nozzle body has a truncated cone portion, a cylindrical pipe portion that is arranged concentrically with the truncated cone portion and is fixed to the truncated cone portion with one pipe end face abutting against the top face of the truncated cone portion, and that has a mist injection hole for injecting a mist of liquid, and a cylindrical portion that is arranged concentrically with the truncated cone portion and is fixed to the truncated cone portion with one pipe end face abutting against the bottom face of the truncated cone portion, and that has a liquid inlet hole into which a liquid is introduced, the mist injection hole is arranged concentrically with the other cylindrical pipe portion tube The opening is formed on the end surface of the body the other end surface of the cylindrical pipe portion protrudes from the injection port to the outside of the gas nozzle body and is inserted into the gas injection hole, forming an annular gas injection flow path between the outer circumferential surface of the cylindrical pipe portion and the inner circumferential surface of the gas injection hole; the truncated cone portion is inserted into the gas throttle hole concentrically with the gas throttle hole, forming an annular gas throttle flow path between the conical side surface of the truncated cone portion and the conical inner circumferential surface of the gas throttle hole; the cylindrical portion is inserted into the gas inlet hole concentrically with the gas inlet hole, forming an annular gas throttle flow path between the outer circumferential surface of the cylindrical portion and the conical inner circumferential surface of the gas inlet hole Hole inner surface They are spaced apart, The guide body is disposed between the inner peripheral surface of the gas inlet hole and the outer peripheral surface of the cylindrical portion over the circumferential direction of the gas inlet hole and is fixed to the cylindrical portion, the gas guide holes are disposed in the circumferential direction of the cylindrical portion with the hole angle between them and penetrate the guide body in the direction of the cylinder center line of the cylindrical portion, the fins are disposed in the circumferential direction of the cylinder body with the fin angle between them and are disposed between the cylinder end faces of the cylinder body at an inclination angle in a horizontal direction perpendicular to the cylinder center line of the cylinder body, and protrude from the inner peripheral surface of the cylinder body toward the cylinder center line of the cylinder body with a fin width, and the cylinder body is the fins are arranged concentrically with the cylindrical portion, the fin width end faces of the fins are abutted against the outer peripheral surface of the cylindrical portion and fitted onto the cylindrical portion, the fins are arranged on the cylindrical portion between one cylindrical end face of the cylindrical portion and the guide body, the fins are arranged between the inner peripheral surface of the gas inlet hole and the outer peripheral surface of the cylindrical portion in the circumferential direction of the gas inlet hole, and an annular gas inlet chamber is formed in the gas inlet hole between the gas throttle hole, the cylindrical body, the fins and the cylindrical portion form gas outflow paths between the inner peripheral surface of the cylindrical body, the fins and the outer peripheral surface of the cylindrical portion, and the gas outflow paths are connected to the gas inlet chamber and connected to the gas guide holes in a manner corresponding to each of the gas guide holes, The swirl flow-forming body is From each gas outflow path This is a fine mist generating nozzle characterized in that gas is discharged into the gas inlet chamber, and a swirling flow around the center line of the cylindrical portion is formed in the gas in the gas inlet chamber. [Effects of the Invention]

[0007] The present invention can generate fine mist by causing a swirling air current to collide with the mist of liquid sprayed from the mist spray hole, thereby finely dividing the liquid sprayed from the mist spray hole. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view showing the fine mist generating nozzle as viewed from above. [Figure 2] FIG. 2 is a perspective view showing the fine mist generating nozzle as viewed from below. [Figure 3] FIG. 2 is a front view showing the fine mist generating nozzle. [Figure 4] FIG. 2 is a left side view showing the fine mist generating nozzle. [Figure 5] 5 is a cross-sectional view taken along the line AA in FIG. 4. [Figure 6] FIG. 6 is an enlarged view of part C in FIG. 5. [Figure 7] FIG. 5 is an enlarged view of the cross section BB of FIG. [Figure 8] FIG. 2(a) is a perspective view showing the gas nozzle as seen from above, and FIG. 2(b) is a perspective view showing the gas nozzle as seen from below. [Figure 9] 9(a) is a plan view showing the gas nozzle, and FIG. 9(b) is a cross-sectional view taken along the line DD of FIG. 9(a). [Figure 10] FIG. 2(a) is a perspective view showing the nozzle cap as seen from above, and FIG. 2(b) is a bottom view showing the nozzle cap. [Figure 11] FIG. 10( b ) is a cross-sectional view taken along the line E-E in FIG. [Figure 12] FIG. 2 is a perspective view showing a mist nozzle and a gas guide as viewed from above. [Figure 13] FIG. 2 is a plan view showing a mist nozzle and a gas guide. [Figure 14] FIG. 4 is a bottom view showing the mist nozzle and the gas guide. [Figure 15] FIG. 14 is a cross-sectional view of FIG. 13 FF. [Figure 16] FIG. 16 is an enlarged view of part G in FIG. [Figure 17] FIG. 2(a) is a perspective view showing the swirl flow-forming body as seen from above, and FIG. 2(b) is a perspective view showing the swirl flow-forming body as seen from below. [Figure 18] FIG. 2( a ) is a plan view showing the swirl flow-forming body, and FIG. 2( b ) is a bottom view showing the swirl flow-forming body. [Figure 19] FIG. 18(b) is a cross-sectional view taken along line HH of FIG. [Figure 20] FIG. 10 is a diagram showing a swirl flow-forming body, and is a perspective view seen from above showing the inclined state of fins (inclined plates). [Figure 21] FIG. 2(a) is a perspective view showing the fluid introducing body as seen from above, and FIG. 2(b) is a plan view of the fluid introducing body. [Figure 22] 17(a) is a bottom view showing the fluid introducing body, and FIG. 17(b) is a cross-sectional view taken along line II of FIG. 17(b). [Figure 23] FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, showing the flow of liquid and gas. [Figure 24] FIG. 24 is an enlarged view of a portion J in FIG. 23. [Figure 25] 5 is an enlarged partial cross-sectional view taken along the line BB in FIG. 4, showing a gas flow (swirl flow). FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The fine mist generating nozzle according to the present invention will be described with reference to FIGS.

[0010] 1 to 25, the fine mist generating nozzle X is a two-fluid nozzle that generates a fine mist with fine bubbles and ultra-fine bubbles mixed in. The fine mist generating nozzle X includes a gas nozzle Y (air nozzle), a mist nozzle Z, a swirl flow forming body U, a fluid introducing body V, a gas guide body W, a gas supply pipe 65, and a gas supply pipe 66.

[0011] As shown in FIGS. 1 to 6, 8 and 9, the gas nozzle Y has a gas nozzle main body 1, a nozzle cap 2 (nozzle connecting main body), and a flange portion 6.

[0012] 8 and 9, the gas nozzle body 1 is formed in a three-dimensional shape having a front surface 1A, a back surface 1B, and a side surface 1C (outer peripheral surface) between the front surface 1A and the back surface 1B, and is formed, for example, in a cylindrical shape having columnar end faces 1A, 1B and a side surface 1C between the columnar end faces 1A, 1B. The gas nozzle body 1 has a gas injection hole 3, a gas inlet hole 4, and a gas throttling hole 5.

[0013] The gas injection hole 3 is formed in a circular shape (circular hole) as shown in Figures 8 and 9. The gas injection hole 3 is formed in the gas nozzle body 1 so that the hole center line a of the gas injection hole 3 coincides with the center line b (pillar center line / cylinder center line) of the gas nozzle body 1. The gas injection hole 3 has an injection port 3A that opens to the surface 1A (one of the column end faces / one of the cylinder end faces) of the gas nozzle body 1. The gas injection hole 3 is formed in the gas nozzle body 1 with a hole length extending from the surface 1A of the gas nozzle body 1 to the back surface 1B of the gas nozzle body 1 in the direction B of the center line b of the gas nozzle body 1.

[0014] Gas flows in through the gas inlet hole 4. As shown in Figures 8 and 9, the gas inlet hole 4 is formed in the gas nozzle body 1, concentrically arranged with the gas jet hole 3. The gas inlet hole 4 opens on the back surface 1B (the other column end surface / the other cylinder end surface) of the gas nozzle body 1 in the direction B of the center line b of the gas nozzle body 1. The gas inlet hole 4 is arranged between the back surface 1B of the gas nozzle body 1 and the gas jet hole 3 in the direction B of the center line b of the gas nozzle body 1.

[0015] As shown in Figures 8(b) and 9(b), the gas inlet hole 4 has, for example, a first gas inlet hole 11 (first gas inlet hole portion), a second gas inlet hole 12 (second gas inlet hole portion), and a third gas inlet hole 13 (third gas inlet hole portion).

[0016] As shown in Figures 8(b) and 9(b), the first gas inlet hole 11 is formed in a circular shape (circular hole) with a hole diameter larger than the hole diameter of the gas injection hole 3. The first gas inlet hole 11 is formed in the gas nozzle body 1 concentrically with the gas injection hole 3. The first gas inlet hole 11 opens on the back surface 1B of the gas nozzle body 1. In the direction B of the center line b of the gas nozzle body 1, it has a hole length from the back surface 1B of the gas nozzle body 1 to the gas injection hole 3 side.

[0017] The second gas inlet hole 12 is formed in a truncated cone shape (cone shape) as shown in Figures 8(b) and 9(b). The second gas inlet hole 12 is formed in the gas nozzle body 1 concentrically with the gas jet hole 3 (first gas inlet hole 11). The second gas inlet hole 12 is disposed between the first gas inlet hole 11 and the gas jet hole 3 (third gas inlet hole 13) in the direction B of the center line b of the gas nozzle body 1, and is formed continuous with the first gas inlet hole 11. The second gas inlet hole 12 is formed in a truncated cone shape (conical hole / frustum conical hole) whose diameter gradually decreases from the first gas inlet hole 11 toward the gas jet hole 3 (third gas inlet hole 13) in the direction B of the center line b of the gas nozzle body 1.

[0018] As shown in Figures 8(b) and 9(b), the third gas inlet hole 13 is formed in a circular shape (circular hole) with a diameter smaller than that of the first gas inlet hole 11 and larger than that of the gas jet hole 3. The third gas inlet hole 13 is formed in the gas nozzle body 1 concentrically with the gas jet hole 3 (second gas inlet hole 12). The third gas inlet hole 13 is disposed between the second gas inlet hole 12 and the gas jet hole 3 (gas throttle hole 5) in the direction B of the center line b of the gas nozzle body 1, and is formed continuously with the second gas inlet hole 12. The third gas inlet hole 13 has a hole length (hole length between the second gas inlet hole 12 and the gas throttle hole 5) from the second gas inlet hole 12 toward the gas jet hole 3 side (gas throttle hole 5 side) in the direction B of the center line b of the gas nozzle body 1.

[0019] As shown in Figures 8(b) and 9(b), the gas throttling hole 5 is formed in the gas nozzle body 1 concentrically with the gas injection hole 3 (third gas inlet hole 13). The gas throttling hole 5 is disposed between the gas injection hole 3 and the gas inlet hole 4 (third gas inlet hole 13) in the direction B of the center line b of the gas nozzle body 1. The gas throttling hole 5 is formed contiguously with the gas injection hole 3 and the gas inlet hole 4 (third gas inlet hole 13). The gas throttling hole 5 is formed in the shape of a truncated cone (frustum conical hole / conical hole) whose diameter gradually decreases from the gas inlet hole 4 (third gas inlet hole 13) to the gas injection hole 3 in the direction B of the center line b of the gas nozzle body 1. The gas throttle hole 5 is formed in a truncated cone shape (frustum of a cone) with a first angle θ1 (first acute angle) between the hole center line c and the conical inner circumferential surface 5a (hole inner circumferential surface) of the gas throttle hole 5. The first angle θ1 is, for example, 45 degrees (45°).

[0020] 8 and 9, the flange 6 is disposed on the rear surface 1B side of the gas nozzle body 1. The flange 6 is formed to protrude from the side surface 1C of the gas nozzle body 1 in a direction perpendicular to the center line b of the gas nozzle body 1. The flange 6 is disposed around the circumferential direction of the gas nozzle body 1.

[0021] As shown in FIGS. 10 and 11, the nozzle cap 2 has a cap body 15 and a cap flange 16 (projection).

[0022] As shown in Figures 10 and 11, the cap body 15 is formed in a cylindrical shape. The cap body 15 has a female screw portion 17 (female thread). The female screw portion 17 is arranged on one cylindrical end face 15A side (cap cylindrical end face side) in the direction of the cylindrical center line of the cap body 15. The female screw portion 17 is formed on the inner peripheral surface 15a of the cap body 15.

[0023] 10 and 11, the cap flange 16 is disposed on the other cylindrical end face 15B side in the direction of the cylindrical center line of the cap body 15 and is fixed to the cap body 15. The cap flange 16 is disposed within the cap body 15, protruding from the inner peripheral surface 15a of the cap body 15 toward the cylindrical center line of the cap body in a direction perpendicular to the cylindrical center line of the cap body 15 (radial direction).

[0024] The mist nozzle Z sprays a mist of liquid (droplets, water droplets). The mist nozzle Z sprays the liquid in the form of a mist. The mist nozzle Z has a mist nozzle body 21, as shown in FIGS.

[0025] As shown in FIGS. 12 to 16, the mist nozzle body 21 has a truncated cone portion 22, a cylindrical pipe portion 23 (mist nozzle portion), and a cylindrical portion 24.

[0026] As shown in Figures 12, 13, 15, and 16, the truncated cone portion 22 is formed in a truncated cone shape (circular truncated cone). The truncated cone portion 22 is formed in a truncated cone shape (circular truncated cone) with a second angle θ2 (second acute angle) between the truncated cone center line d of the truncated cone portion 22 and the cone side surface 22C. The second angle θ2 is, for example, an angle smaller than the first angle θ1. The second angle θ2 is, for example, 30 degrees (30°). The truncated cone portion 22 has liquid flow holes 25 (liquid holes) as shown in Figures 14 to 16.

[0027] 16, the liquid circulation hole 25 is formed in a circular shape (circular hole) and is arranged concentrically with the truncated cone portion 22. The liquid circulation hole 25 extends in a direction D of the truncated cone center line d (center line) of the truncated cone portion 22 and opens to an upper surface 22A (upper surface of the truncated cone) of the truncated cone portion 22.

[0028] As shown in Figures 12, 13, 15, and 16, the cylindrical pipe portion 23 is arranged concentrically with the truncated cone portion 22, with the pipe center line e of the cylindrical pipe portion 23 coinciding with the truncated cone center line d (cone center line) of the truncated cone portion 22. The cylindrical pipe portion 23 has one pipe end face 23A and the other pipe end face 23B (each pipe end face 23A, 23B) in the direction E of the pipe center line e. The cylindrical pipe portion 23 is fixed to the truncated cone portion 22 with one pipe end face 23A abutting against the upper surface 22A of the truncated cone portion 22. The outer diameter of the cylindrical pipe portion 23 is the same as the diameter of the upper surface 22A of the truncated cone portion 22. The outer diameter of the cylindrical pipe portion 23 is smaller than the hole diameter of the gas injection hole 3.

[0029] As shown in Figures 12, 13, 15, and 16, the cylindrical pipe portion 23 is formed in a cylindrical shape and has mist injection holes 26 that inject a liquid mist (liquid droplets, water droplets). The mist injection holes 26 are formed in a circular shape (circular holes) with the same hole diameter as the liquid circulation holes 25, and are arranged concentrically with the cylindrical pipe portion 23 (liquid circulation holes 25). The mist injection holes 26 penetrate the cylindrical pipe portion 23 in the direction of the pipe center line e of the cylindrical pipe portion 23, and open to each of the pipe end faces 23A, 23B. The mist injection holes 26 are in communication with the liquid circulation holes 25.

[0030] As shown in Figures 12 to 16, the cylindrical portion 24 is formed in a cylindrical shape and is disposed concentrically with the truncated cone portion 22, with the cylinder center line f of the cylindrical portion 24 coinciding with the truncated cone center line d of the truncated cone portion 22. The cylindrical portion 24 has one cylinder end surface 24A and the other cylinder end surface 24B (each cylinder end surface 24A, 24B) in the direction F of the cylinder center line f. The cylindrical portion 24 is fixed to the truncated cone portion 22 with the one cylinder end surface 24A abutting against the bottom surface 22B of the truncated cone portion 22. The outer diameter of the cylindrical portion 24 is the same as the diameter of the bottom surface 22B of the truncated cone portion 22.

[0031] As shown in Figures 14 to 16, the cylindrical portion 24 has a liquid inlet hole 27 through which liquid flows in. The liquid inlet hole 27 is formed in a circular shape (circular hole) with a hole diameter larger than the mist injection hole 26 (liquid circulation hole 25), and is arranged concentrically with the cylindrical portion 24 (liquid circulation hole 25, mist injection hole 26). The liquid inlet hole 27 penetrates the cylindrical portion 24 in the direction of the cylindrical center line f of the cylindrical portion 24, and opens to each cylindrical end surface 24A, 24B of the cylindrical portion 24. The liquid inlet hole 27 is connected to the liquid circulation hole 25. The liquid inlet hole 27 is connected to the mist injection hole 26 through the liquid circulation hole 25.

[0032] 16, the mist injection hole 26 is opened on the other pipe end surface 23B of the cylindrical pipe portion 23 and communicates with the liquid inlet hole 27. The mist injection hole 26 is communicated with the liquid inlet hole 27 through the liquid circulation hole 25.

[0033] As shown in FIGS. 17 to 20, the swirl flow-forming body U has a cylindrical main body 31 (fin support cylindrical portion) and a plurality of (for example, six) fins 32 (inclined plates).

[0034] 17 to 20, the tube body 31 is formed in a cylindrical shape. The tube body 31 has one tube end surface 31A and the other tube end surface 31B (each tube end surface 31A, 31B) in the direction G of the tube center line g of the tube body 31.

[0035] Each fin 32 (inclined plate) is formed in a plate shape, as shown in FIGS. 17 to 20. Each fin 32 is arranged (formed) on the tube main body 31. As shown in FIG. 18(a), each fin 32 is arranged in the circumferential direction of the tube main body 31, with a fin angle θA (inter-plate angle / equal angle) between each other. As shown in FIGS. 19 and 20, each fin 32 is arranged between each tube end face 31A, 31B of the tube main body 31, with an inclination angle θB (acute angle) in a horizontal direction H (hereinafter referred to as the "horizontal direction H") perpendicular to the tube center line g of the tube main body 31. Each fin 32 is inclined at an inclination angle θB in the same direction in the circumferential direction of the tube main body 31. The inclination angle θB is, for example, 30 degrees or more and 70 degrees or less.

[0036] As shown in FIGS. 17 to 20, each fin 32 (inclined plate) is fixed (connected) to the inner circumferential surface 31b (inner circumference) of the tube main body 31. Each fin 32 protrudes from the inner circumferential surface 31b of the tube main body 31 toward the tube center line g in the radial direction of the tube main body 31 with a fin width Fh (plate width). Each fin 32 has a fin length Fl (plate length) in a direction S inclined between the tube end faces 31A, 31B of the tube main body 31 (hereinafter referred to as the "inclined direction S") and is arranged between the tube end faces 31A, 31B of the tube main body 31. Each fin 32 is arranged with a gap between the fin width end 32a (plate width end) of the fin 32 and the tube center line g of the tube main body 31 in the radial direction of the tube main body 31.

[0037] As shown in FIGS. 19 and 20 , each fin 32 (inclined plate) has a fin thickness (plate thickness) in a fin thickness direction T that is perpendicular to the inclination direction S. Each fin 32 has a fin front surface 32A (fin front surface) and a fin back surface 32B (fin back surface) in the fin thickness direction T (plate thickness direction). The fin front surface 32A is formed at an inclination angle θB with respect to the horizontal direction H, toward one cylindrical end surface 31A of the cylindrical main body 31. The fin front surface 32A (inclined front surface) is formed toward one cylindrical end surface 31A of the cylindrical main body 31. The fin back surface 32B (inclined back surface) is formed at an inclination angle θB with respect to the horizontal direction H, toward the other cylindrical end surface 31B of the cylindrical main body 31. The fin back surface 32B is arranged toward the other cylindrical end surface 31B of the cylindrical main body 31. The fin back surface 32B is arranged parallel to the fin front surface 32A.

[0038] As shown in FIGS. 21 and 22, the fluid introducer V (fluid supplier) has a fluid introduction cylindrical portion 41 (fluid supply cylindrical portion), a closing portion 42, a gas supply hole 43, and a liquid supply hole 44.

[0039] 21 and 22, the fluid introducing cylindrical portion 41 is formed in a cylindrical shape. The fluid introducing cylindrical portion 41 has a gas introducing hole 45, a male screw portion 46, and a female screw portion 47.

[0040] 17 and 18, the gas introduction hole 45 is arranged concentrically with the fluid introduction cylindrical portion 41. The gas introduction hole 45 penetrates the fluid introduction cylindrical portion 41 in the direction I of the cylindrical center line i of the fluid introduction cylindrical portion 41 and opens at one cylindrical end face 41A and the other cylindrical end face 41B (each cylindrical end face 41A, 41B) of the fluid introduction cylindrical portion 41.

[0041] As shown in Figures 21 and 22(b), the male screw portion 46 (male screw) is arranged on one cylindrical end surface 41A side of the fluid introducing cylindrical portion 41. The male screw portion 46 is formed on the outer peripheral surface 41a of the fluid introducing cylindrical portion 41. As shown in Figures 21(b) and 22(b), the female screw portion 47 (female screw) is arranged on one cylindrical end surface 41A side of the fluid introducing cylindrical portion 41. The female screw portion 47 is formed on the inner peripheral surface of the fluid introducing cylindrical portion 41 (hole inner peripheral surface 45a of the gas introducing hole 45).

[0042] As shown in FIG. 22, the closing portion 42 closes the other cylindrical end surface 41B of the fluid introducing cylindrical portion 41 and is fixed to the fluid introducing cylindrical portion 41.

[0043] 21(a) and 21(b), the gas supply hole 43 is formed in the fluid introducing cylindrical portion 41. The gas supply hole 43 is arranged on the other cylindrical end surface 41B side of the fluid introducing cylindrical portion 41. The gas supply hole 43 penetrates the fluid introducing cylindrical portion 41 in a direction (radial direction) perpendicular to the cylindrical center line i of the fluid introducing cylindrical portion 41, and opens to the outer peripheral surface 41a and inner peripheral surface (hole inner peripheral surface 45a of the gas introducing hole 45) of the fluid introducing cylindrical portion 41. The gas supply hole 43 penetrates the fluid introducing cylindrical portion 41 and opens into the fluid introducing cylindrical portion 41 (inside the gas introducing hole 45).

[0044] 21(b) and 22, the liquid supply hole 44 is formed in the closing part 42 concentrically with the fluid introducing cylindrical part 41. The liquid supply hole 44 penetrates the closing part 42 in the direction I of the cylindrical center line i of the fluid introducing cylindrical part 41 and opens to the gas introducing hole 45 (inside the fluid introducing cylindrical part 41).

[0045] The gas guiding body W is formed integrally with, for example, the swirl flow-forming body U (cylindrical portion 24). As shown in FIGS. 12 to 16, the gas guiding body W has a guide body 51 and a plurality of (for example, six) gas guide holes 52.

[0046] As shown in FIGS. 12 to 16, the guide body 51 has a storage cylindrical portion 54 (large diameter cylindrical portion), a guide closing portion 55 (closing portion), and a guide cylindrical portion 56 (small diameter cylindrical portion).

[0047] The cylindrical storage portion 54 is formed in a cylindrical shape having an inner diameter (inner diameter) larger than the outer diameter of the cylindrical portion 24. As shown in Figures 12 to 16, the cylindrical storage portion 54 has one cylindrical end surface 54A and the other cylindrical end surface 54B (each cylindrical end surface 54A, 54B) in the direction J of the cylindrical storage portion 54.

[0048] The guide blocking portion 55 is formed in an annular flat plate (annular plate). As shown in Figures 12, 13, 15, and 16, the guide blocking portion 55 (guide blocking plate) has a plate surface 55A (front surface) and a plate back surface 55B (back surface) in the plate thickness direction. The guide blocking portion 55 is arranged concentrically with the cylindrical storage portion 54. The guide blocking portion 55 is fixed to the cylindrical storage portion 54 by abutting the plate surface 55A against one cylindrical end surface 54A of the cylindrical storage portion 54.

[0049] The guide tube portion 56 is formed in a cylindrical shape with an outer diameter (outer diameter) smaller than the inner diameter of the cylindrical storage portion 54 and larger than the outer diameter of the cylindrical portion 24. As shown in Figures 12, 14 to 16, the guide tube portion 56 has one tube end surface 56A and the other tube end surface 56B (each tube end surface) in the direction L of the tube center line l of the guide tube portion 56. The guide tube portion 56 is arranged concentrically with the cylindrical storage portion 54 (guide closing portion 55). The guide tube portion 56 is fixed to the guide closing portion 55 with one tube end surface 56A abutting against the plate back surface 55B of the guide closing portion 55. The guide tube portion 56 has a male thread portion 57. The male thread portion 57 (male screw) is arranged on the other tube end surface 56B side of the guide tube portion 56. The male thread portion 57 is formed on the outer peripheral surface of the guide tube portion 56.

[0050] The number of gas guide holes 52 is the same as the number of fins 32 (inclined plates). As shown in Figures 12 to 16, each gas guide hole 52 is formed in the guide body 51. Each gas guide hole 52 is formed in the guide closing part 55 and the guide tube part 56. As shown in Figures 12 to 14, each gas guide hole 52 is arranged in the circumferential direction of the guide closing part 55 (guide tube part 56) with a hole angle θα (equal angle) between each gas guide hole 52. Each gas guide hole 52 is arranged on a circle Cp of radius r1 centered on the center line k of the guide closing part 55 (cylinder center line l of the guide tube part 56).

[0051] As shown in Figures 12 to 16, each gas guide hole 52 penetrates the guide blocking portion 55 and the guide cylindrical portion 56 (guide main body 51) in the direction K of the center line k of the guide blocking portion 55 (direction L of the tube center line l of the guide cylindrical portion 56) and opens to the plate surface 55A of the guide blocking portion 55 and the other tube end face 56B of the guide cylindrical portion 56.

[0052] As shown in FIGS. 12 to 16, the gas guide W (guide body 51) is fixed to the mist nozzle Z (mist nozzle body 21).

[0053] As shown in Figures 12 to 16, the gas guide body W (guide body 51) is arranged concentrically with the cylindrical portion 24 (cylindrical pipe portion 23), with the other cylindrical end surface 54B of the storage cylindrical portion 54 facing the cylindrical pipe portion 23 and the other cylindrical end surface 56B of the guide cylindrical portion 56 facing the other cylindrical end surface 24B of the cylindrical portion 24.

[0054] 12 to 16, the guide body 51 (gas guide body W) is arranged by fitting the cylindrical storage portion 54, the closing guide portion 55, and the guide tube portion 56 onto the outside of the cylindrical portion 24. The guide body 51 (gas guide body W) is arranged in the mist nozzle body 21 (mist nozzle Z) with the inner peripheral surface 55b of the closing guide portion 55 and the inner peripheral surface 56b of the closing guide portion 56 abutting against the outer peripheral surface 24a of the cylindrical portion 24, thereby fixing the closing guide portion 55 and the guide tube portion 56 to the cylindrical portion 24. The guide body 51 (gas guide body W) is fixed to the cylindrical portion 24 (mist nozzle body 21) with a distance δ between the other cylindrical end surface 54B (guide body 51) of the cylindrical storage portion 54 and one cylindrical end surface 24A of the cylindrical portion 24 in the direction F of the cylindrical center line f of the cylindrical portion 24.

[0055] In the fine mist generating nozzle X, the mist nozzle Z (mist nozzle body 21) is arranged concentrically with the gas nozzle Y (gas nozzle body 1), as shown in Figures 5 and 6, and is inserted into the gas injection hole 3, gas inlet hole 4, and gas throttling hole 5 from the back surface 1B of the gas nozzle body 1.

[0056] 6, the mist nozzle Z (mist nozzle main body 21) is arranged in the gas nozzle main body 1 (gas nozzle Y) by inserting the cylindrical pipe portion 23 through the gas throttling hole 5 into the gas injection hole 3, inserting the truncated cone portion 22 through the gas inlet hole 4 into the gas throttling hole 5, and inserting the cylindrical portion 24 (one cylinder end face 24B side) from the back surface 1B of the gas nozzle main body 1 into the gas inlet hole 4 (first to third gas inlet holes 11 to 13). The mist nozzle Z (mist nozzle main body 21) is arranged in the gas nozzle Y (gas nozzle main body 1) by having the other pipe end face 23B (the other pipe end face 23B side) of the cylindrical pipe portion 23 protrude outside the gas nozzle Y (gas nozzle main body 1) from the injection port 3A (gas injection hole 3). The mist nozzle Z (mist nozzle main body 21) is arranged in the gas nozzle main body 1 (gas nozzle Y) with the other cylindrical end surface 24B side of the cylindrical portion 24 protruding from the gas inlet hole 4 (first gas inlet hole 11) to the outside of the gas nozzle main body 1.

[0057] As shown in Fig. 6, the cylindrical pipe portion 23 is arranged concentrically with the gas injection hole 3, with the pipe center line e coinciding with the hole center line a of the gas injection hole 3. The cylindrical pipe portion 23 (one pipe end face 23A side) is inserted into the gas injection hole 3 from the gas throttle hole 5, concentric with the gas injection hole 3. The cylindrical pipe portion 23 (one pipe end face 23A side) is inserted (arranged) into the gas injection hole 3 over the circumferential direction of the gas injection hole 3, with a gap between the outer peripheral surface 23a of the cylindrical pipe portion 23 and the hole inner peripheral surface 3a of the gas injection hole 3. The cylindrical pipe portion 23 is arranged so that the other pipe end face 23B (the other pipe end face 23B side) protrudes outside the gas nozzle body 1 from the gas injection hole 3 (injection port 3A).

[0058] 6, the cylindrical pipe portion 23 (on one pipe end surface 23A side) forms an annular (circular ring) gas injection flow path α between the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical pipe portion 23, over the circumferential direction of the gas injection hole 3. The gas injection flow path α is formed in an annular (circular ring) shape between the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical pipe portion 23, over the circumferential direction of the gas injection hole 3.

[0059] As shown in Fig. 6 , the truncated cone portion 22 is arranged concentrically with the gas throttle hole 5, with the truncated cone center line d coinciding with the hole center line c of the gas throttle hole 5. The truncated cone portion 22 is inserted from the gas inlet hole 4 into the gas throttle hole 5, concentrically with the gas throttle hole 5. The truncated cone portion 22 is inserted (arranged) in the gas throttle hole 5 over the circumferential direction of the gas throttle hole 5, with a gap between the conical side surface 22C of the truncated cone portion 22 and the conical inner circumferential surface 5a of the gas throttle hole 5.

[0060] As shown in Fig. 6, the truncated cone portion 22 forms an annular gas throttling flow path β over the circumferential direction of the gas throttling hole 5 between the conical inner circumferential surface 5a of the gas throttling hole 5 and the conical side surface 22C of the truncated cone portion 22. As shown in Fig. 6, the gas throttling hole 5 and the truncated cone portion 22 form an annular gas throttling flow path β over the circumferential direction of the gas throttling hole 5 between the conical inner circumferential surface 5a of the gas throttling hole 5 and the conical side surface 22C of the truncated cone portion 22. The gas throttling flow path β is formed annularly over the circumferential direction of the gas throttling hole 5 between the conical inner circumferential surface 5a of the gas throttling hole 5 and the conical side surface 22C of the truncated cone portion 22, and is connected to the gas injection flow path α. The gas throttling flow path β gradually narrows from the gas inlet hole 4 (third gas inlet hole 13) toward the gas injection flow path α in the direction of the hole center line c of the gas throttling hole 5 (direction of the center line b of the gas nozzle main body 1), and is connected to the gas injection flow path α.

[0061] 6, the cylindrical portion 24 (on one cylinder end face 24B side) is arranged concentrically with the gas inlet holes 4 (first to third gas inlet holes 11 to 13) with the cylinder center line f coinciding with the hole center lines of the gas inlet holes 4 (first to third gas inlet holes 11 to 13). The cylindrical portion 24 (on one cylinder end face 24A side) is inserted into the gas inlet holes 4 from the back surface 1B of the gas nozzle main body 1, concentrically with the gas inlet holes 4 (first to third gas inlet holes 11 to 13). The cylindrical portion 24 (one cylinder end face 24A side) is inserted (arranged) in the gas inlet holes 4 (first to third gas inlet holes 11 to 13) around the circumferential direction of the gas inlet holes 4 (first to third gas inlet holes 11 to 13), with a gap between the outer peripheral surface 24a of the cylindrical portion 24 and the hole inner peripheral surfaces 4a (hole inner peripheral surfaces 11a to 13a of the first to third gas inlet holes 11 to 13) of the gas inlet holes 4. The cylindrical portion 24 is arranged with the other cylinder end face 24B side protruding outward from the gas inlet hole 4 (first gas inlet hole 11) to the outside of the gas nozzle body 1.

[0062] 6, the cylindrical portion 24 (one cylinder end face 24A side) forms an annular gas inlet chamber γ (gas inlet passage) between the outer peripheral surface 24a of the cylindrical portion 24 (one cylinder end face 24A side) and the hole inner peripheral surfaces 4a (hole inner peripheral surfaces 12a, 13a of the second and third gas inlet holes 12, 13) of the gas inlet holes 4 in the circumferential direction of the gas inlet holes 4 (second and third gas inlet holes 12, 13). The gas inlet chamber γ is in communication with the gas throttle passage β.

[0063] As shown in Figures 5 and 6, the mist nozzle Z (mist nozzle main body 21) is arranged so that the cylindrical portion 24 (the other cylindrical end face 24B side) protruding outside the gas nozzle main body 1 is concentric with the fluid introduction body V (fluid introduction cylindrical portion 41), and the other cylindrical end face 24B side of the cylindrical portion 24 is inserted into the fluid introduction cylindrical portion 41 (gas introduction hole 45), thereby being arranged in the fluid introduction body V (fluid introduction cylindrical portion 41).

[0064] 5 and 6, the cylindrical portion 24 (the other cylindrical end face 24B side) is arranged concentrically with the gas introduction hole 45, with the cylinder center line f coinciding with the cylinder center line i (the hole center line of the gas introduction hole 45) of the fluid introduction cylindrical portion 41. The cylindrical portion 24 (the other cylindrical end face 24B side) is inserted into the fluid introduction cylindrical portion 41 (gas introduction hole 45) from one cylindrical end face 41A of the fluid introduction cylindrical portion 41, concentric with the fluid introduction cylindrical portion 41 (gas introduction hole 45). The cylindrical portion 24 is inserted (arranged) in the gas introduction hole 45 (inside the fluid introduction cylindrical portion 41) with the other cylindrical end face 24B abutting against the blocking portion 42 from inside the fluid introduction cylindrical portion 41 (gas introduction hole 45), and the liquid inlet hole 27 communicating with the liquid supply hole 44. The cylindrical portion 24 is inserted (placed) in the gas introducing hole 45 with a gap between the outer peripheral surface 24a of the cylindrical portion 24 and the inner peripheral surface 45a of the gas introducing hole 45 in the circumferential direction of the gas introducing hole 45.

[0065] 5 and 6, the cylindrical portion 24 forms an annular (circular ring) gas introduction flow path σ between the outer peripheral surface 24a of the cylindrical portion 24 and the inner peripheral surface 45a of the gas introduction hole 45 in the circumferential direction of the gas introduction hole 45. The gas introduction flow path σ is in communication with the gas supply hole 43. The gas introduction flow path σ is formed in an annular (circular ring) shape between the outer peripheral surface 24a of the cylindrical portion 24 and the inner peripheral surface 45a of the gas introduction hole 45 in the circumferential direction of the gas introduction hole 45.

[0066] In the fine mist generating nozzle X, the gas guide W (guide body 51) is arranged concentrically with the gas nozzle Y (gas nozzle body 1) as shown in Figures 5 and 6. The gas guide W (guide body 51) is arranged concentrically with the gas injection hole 3, the gas inlet hole 4, and the gas throttling hole 5.

[0067] 5 and 6, the gas guide body W (guide body 51) is arranged such that the other cylindrical end surface 54B of the cylindrical storage portion 54 abuts against the gas nozzle body 1 from the back surface 1B of the gas nozzle body 1. The guide body 51 (guide closing portion 55) is arranged around the circumferential direction of the gas inlet hole 4, between the hole inner peripheral surface 4a of the gas inlet hole 4 (hole inner peripheral surface 11a of the first gas inlet hole 11) and the outer peripheral surface 24a of the cylindrical portion 24, and is fixed to the cylindrical portion 24 (mist nozzle body 21).

[0068] As shown in Fig. 7, the gas guide holes 52 are arranged on a circle Cp of radius r1 centered on the cylinder center line f of the cylindrical portion 24 (the center line of the mist nozzle main body 21). The gas guide holes 52 are arranged in the circumferential direction of the cylindrical portion 24 with a hole angle θα between each other. As shown in Figs. 5 and 6, the gas guide holes 52 pass through the guide main body 51 (guide closing portion 55, guide cylinder portion 56) in the direction F of the cylinder center line f of the cylindrical portion 24 and communicate with the gas introduction flow path σ.

[0069] In the fine mist generating nozzle X, the fluid introducing body V is arranged concentrically with the mist nozzle Z (cylindrical portion 24) as shown in Figures 5 to 7. The fluid introducing body V is fixed to the guide main body 51 (cylindrical portion 24) by fitting the fluid introducing cylindrical portion 41 onto the other cylindrical end surface 24B side of the cylindrical portion 24.

[0070] 5 and 6, the fluid introducing cylindrical portion 41 is arranged concentrically with the cylindrical portion 24, with the cylindrical center line i coinciding with the cylindrical center line f of the cylindrical portion 24, and is fixed to the guide main body 51 (mist nozzle main body 21). The fluid introducing cylindrical portion 41 is fitted onto the other cylindrical end surface 24B of the cylindrical portion 24, with one cylindrical end surface 41A facing the guide main body 51 (the storage cylindrical portion 54, the plate back surface 55B of the guide closing portion 55). The fluid introducing cylindrical portion 41 is fixed to the guide cylindrical portion 56 (guide main body 51) by inserting the guide cylindrical portion 56 into the gas introducing hole 45 from one cylindrical end surface 41A and screwing (threading) the male thread portion 57 of the guide cylindrical portion 56 into the female thread portion 47.

[0071] The gas supply hole 43 is connected to the gas introduction flow path σ as shown in Fig. 5. The liquid supply hole 44 is connected to the other cylindrical end surface 24B of the cylindrical portion 24 and is connected to the liquid inlet hole 27 as shown in Fig. 5.

[0072] 1, 4, and 5, the gas supply pipe 65 is connected to the gas supply hole 43 and a gas supply source (not shown). The gas supply pipe 65 supplies gas (e.g., air) from the gas supply source to the gas supply hole 43. The liquid supply pipe 66 is connected to the liquid supply hole 44 and a liquid supply source (not shown) as shown in FIGS. 2 and 5. The liquid supply pipe 66 supplies liquid (e.g., water) from the liquid supply source to the gas supply hole 43.

[0073] In the fine mist generating nozzle X, the swirl flow-forming body U (cylinder main body 31) is arranged concentrically with the gas nozzle Y (gas nozzle main body 1) and the mist nozzle Z (mist nozzle main body 21), as shown in FIGS. 5 to 7. The swirl flow-forming body U (cylinder main body 31) is arranged between the gas nozzle Y (gas nozzle main body 1) and the gas guide body W (guide main body 51) and is fixed to the gas nozzle main body 1. The swirl flow-forming body U (cylinder main body 31) is inserted into the gas inlet hole 4 (first gas inlet hole 11) and arranged in the gas nozzle main body 1 (gas nozzle Y). The swirl flow-forming body U (cylinder main body 31) is fitted onto the cylindrical portion 24 (one of the cylindrical end faces 24A) and arranged in the mist nozzle Z (mist nozzle main body 21). The swirl flow forming body U is arranged around the gas inlet hole 4 (first gas inlet hole 11) between the inner peripheral surface 4a of the gas inlet hole 4 (inner peripheral surface 11a of the first gas inlet hole 11) and the outer peripheral surface 24a of the cylindrical portion 24 (one of the cylindrical end faces 24A).

[0074] 5 to 7, the cylindrical body 31 is arranged concentrically with the cylindrical portion 24 and the gas inlet hole 4 (first gas inlet hole 11), with the cylinder center line g coinciding with the cylinder center line f of the cylindrical portion 24. The cylindrical body 31 is inserted into the gas inlet hole 4 (first gas inlet hole 11) from the back surface 1B of the gas nozzle body 1, with one cylinder end surface 31A facing one cylinder end surface 24A (gas throttle hole 5) of the cylindrical portion 24. The cylindrical body 31 is inserted into the gas inlet hole 4 (first gas inlet hole 11) with the outer peripheral surface 31a of the cylindrical body 31 abutting against the hole inner peripheral surface 4a of the gas inlet hole 4 (hole inner peripheral surface 11a of the first gas inlet hole 11). The cylindrical body 31 is disposed circumferentially around the gas inlet hole 4, between the inner peripheral surface 4a of the gas inlet hole 4 (the inner peripheral surface 11a of the first gas inlet hole 11) and the outer peripheral surface 24a of the cylindrical portion 24 (on one cylindrical end surface 24A side). The cylindrical body 31 is fitted onto the cylindrical portion 24 from one cylindrical end surface 24A (cylindrical pipe portion 23) of the cylindrical portion 24, and disposed in the cylindrical portion 24 between one cylindrical end surface 24A of the cylindrical portion 24 and the gas guide body W (guide body 51 / guide closing portion 55).

[0075] As shown in FIGS. 6 and 7, the cylindrical body 31 is fitted onto the cylindrical portion 24 with the fin width end faces 31c of each fin 32 (inclined plate) abutting against the outer peripheral surface 24a of the cylindrical portion 24, and is disposed on one cylindrical end face 24A of the cylindrical portion 24. The cylindrical body 31 is fixed to, for example, the gas nozzle body 1. The cylindrical body 31 is inserted into the cylindrical storage portion 54 and disposed on the gas guide body W (guide body 51) with the other cylindrical end face 31B abutting against the plate surface 55A of the guide closing portion 55. The cylindrical body 31 (swirl flow-forming body U) forms an annular gas inflow chamber γ between the gas inflow holes 4 (second and third gas inflow holes 12, 13) and the gas throttle hole 5 (gas throttle flow path β) in the direction F of the cylindrical center line f of the cylindrical portion 24. The gas inlet chamber γ (gas inlet flow path) is formed in an annular shape between the inner circumferential surface 4a of the gas inlet hole 4 (the inner circumferential surfaces 11a, 12a of the second and third gas inlet holes 11, 12) between the gas throttle hole 5 and the swirl flow-forming body U (one of the cylindrical end faces 31A of the cylindrical main body 31) and the outer circumferential surface 24a of the cylindrical portion 24, and is connected to the gas throttle flow path β. The gas inlet chamber γ is formed in an annular shape around the circumferential direction of the gas inlet hole 4 (the second and third gas inlet holes 11, 12). The guide main body 51 is fixed to the cylindrical portion 24 with the cylindrical main body 31 (swirl flow-forming body U) disposed between it and the gas nozzle main body 1.

[0076] As shown in Fig. 7, the tube main body 31, each fin 32, and cylindrical portion 24 form a gas outlet flow path τ between the inner peripheral surface 31b of the tube main body 31, the fin front surface 32A of each fin 32, the fin back surface 32B of each fin 32, and the outer peripheral surface 24a of the cylindrical portion 24. Each gas outlet flow path τ is formed between the fin front surface 32A and the fin back surface 32B of each fin 32 in the direction F of the tube center line f of the cylindrical portion 24 and communicates with the gas inlet flow path σ. Each gas outlet flow path τ is arranged in the circumferential direction of the cylindrical portion 24, with a fin angle θA (angle) between each other. Each gas outlet flow path τ has an inclination angle θB with respect to the horizontal direction H, penetrates the tube main body 31, and communicates with the gas inlet chamber γ. 7, each gas outlet flow path τ corresponds to (faces) each gas guide hole 52 and is connected to each gas guide hole 52. Each gas guide hole 52 is arranged between each fin 32 and corresponds to (faces) each gas outlet flow path τ and is connected to each gas outlet flow path τ. Each gas guide hole 52 faces the fin back surface 32B (inclined back surface) of each fin 32 in each gas outlet flow path τ (between each fin 32), and is connected to each gas outlet flow path τ.

[0077] 1 to 7, in the fine mist generating nozzle X, the nozzle cap 2 (cap body 15) is fitted onto the gas nozzle Y (gas nozzle body 1), gas guide body W (storage cylindrical portion 54), and fluid introducing body V (fluid introducing cylindrical portion 41), and fixed to the fluid introducing body V (fluid introducing cylindrical portion 41). The nozzle cap 2 is fitted onto the gas nozzle Y (gas nozzle body 1) and fluid introducing body V (fluid introducing cylindrical portion 41), and connects the gas nozzle Y (gas nozzle body 1) and the fluid introducing body V (fluid introducing cylindrical portion 41).

[0078] 6, the cap body 15 is fitted onto the gas nozzle body 1, the cylindrical storage portion 54, and the fluid introducing cylindrical portion 41 from the surface 1A of the gas nozzle body 1, with one cylindrical end surface 15A facing the fluid introducing cylindrical portion 41. The cap body 15 is arranged such that the cap flange portion 16 abuts against the flange portion 6 of the gas nozzle Y (gas nozzle body 1) from the surface 1A side of the gas nozzle body 1. The cap body 15 is fixed to the fluid introducing cylindrical portion 41 by screwing (threading) the male thread portion 46 of the fluid introducing cylindrical portion 41 into the female thread portion 17, thereby connecting the gas nozzle body 1 and the fluid introducing cylindrical portion 41.

[0079] 23, in the fine mist generating nozzle X, liquid P (water) is supplied from a liquid supply pipe 66 to a liquid supply hole 44. The liquid P supplied to the liquid supply hole 44 flows through the liquid supply hole 44 toward the other cylindrical end surface 24B (liquid inlet hole 27) of the cylindrical portion 24, and flows into the liquid inlet hole 27 (inside the cylindrical portion 24). The liquid P (water) flows into the liquid inlet hole 27.

[0080] The liquid P that has flowed into the liquid inlet hole 27 flows through the liquid inlet hole 27 towards the liquid circulation hole 25 and is then discharged into the liquid circulation hole 25, as shown in FIGS.

[0081] As shown in Figures 23 and 24, the liquid P that flows out into the liquid circulation hole 25 flows through the liquid circulation hole 25 toward the mist injection hole 26 (cylindrical pipe portion 23) and flows into the mist injection hole 26 (inside the cylindrical pipe portion 23).

[0082] As shown in Figures 23 and 24, liquid P (water) that flows into mist injection holes 26 (inside cylindrical pipe portion 23) flows through mist injection holes 26 (inside cylindrical pipe portion 23) toward the other pipe end surface 23B of cylindrical pipe portion 23 and is sprayed from the other pipe end surface 23B (mist injection holes 26) of cylindrical pipe portion 23 as liquid mist M (liquid droplets, water droplets) to the outside of mist nozzle Z (mist nozzle main body 21). Cylindrical pipe portion 23 (mist injection holes 26) sprays mist M (liquid droplets, water droplets) of liquid P from the other pipe end surface 23B of cylindrical pipe portion 23 to the outside of mist nozzle Z (fine mist generating nozzle X) in the direction E of the pipe center line e of cylindrical pipe portion 23. Cylindrical pipe portion 23 sprays liquid P in the form of mist from mist injection holes 26.

[0083] 23 and 24, in the fine mist generating nozzle X, a gas Q (compressed gas, compressed air) is supplied from a gas supply pipe 65 to a gas supply hole 43. The gas Q supplied to the gas supply hole 43 flows through the gas supply hole 43 toward the gas introduction flow path σ and is introduced (flows into) the gas introduction flow path σ.

[0084] 23 and 24, the gas Q introduced into the gas introduction flow path σ flows through the gas introduction flow path σ toward each gas guide hole 52 (guide tube portion 56) and flows into each gas guide hole 52. The gas Q (compressed gas, compressed air) flows into each gas guide hole 52.

[0085] 23 and 24, the gas Q that has flowed into each gas guide hole 52 flows toward each gas outflow flow path τ (between each fin 32) and is discharged into each gas outflow flow path τ. Each gas guide hole 52 causes the gas Q to flow into the gas outflow flow path τ that corresponds to (opposes) each gas guide hole 52.

[0086] 24 and 25, the gas that has flowed into each gas outlet flow path τ collides with the fin back surface 32B (inclined back surface) of each fin 32 in each gas outlet flow path τ and flows through each gas outlet flow path τ along the fin front surface 32A (inclined front surface) and the fin back surface 32B (inclined back surface) toward the gas inlet chamber γ. The gas Q that has flowed into each gas outlet flow path τ is directed by the fin front surface 32A and the fin back surface 32B of each fin 32 in a direction that has an inclination angle θB with respect to the horizontal direction H, and flows through each gas outlet flow path τ.

[0087] 25, the gas Q (air) flowing through each gas outlet flow path τ is discharged from each gas outlet flow path τ along the outer peripheral surface 24a of the cylindrical portion 24 into the gas inlet chamber γ (gas inlet hole 4). Each gas outlet flow path τ discharges (ejects) the gas Q into the gas inlet chamber γ along the outer peripheral surface 24a of the cylindrical portion 24. Each gas outlet flow path τ discharges (ejects) the gas into the gas inlet chamber γ around the cylindrical center line of the cylindrical portion 24, for example, in a clockwise direction.

[0088] As shown in Figures 24 and 25, the gas Q flowing out into the gas inlet chamber γ flows in a circular motion around the cylindrical center line f of the cylindrical portion 24, along the outer surface 24a of the cylindrical portion 24 and the inner surface 4a of the gas inlet hole 4 (the inner surfaces 12a, 13a of the second and third gas inlet holes 12, 13).

[0089] 24 and 25, each gas outlet flow path τ discharges (injects) the gas Q (air) into the gas inlet chamber γ, forming (generating) a swirling flow (vortex flow) in the gas in the gas inlet chamber γ along the outer peripheral surface 24a of the cylindrical portion 24. Each gas outlet flow path τ discharges (injects) the gas Q (air) into the gas inlet chamber γ, forming (generating) a swirling flow (vortex flow) in the gas inlet chamber γ about the cylinder center line of the cylindrical portion 24. The swirling flow of the gas is a swirling flow (vortex flow) about the cylinder center line of the cylindrical portion 24, and rotates (swirls) in the clockwise direction, for example.

[0090] As shown in Figures 24 and 25, the swirl flow-forming body U discharges (ejects) gas Q from each gas outlet flow path τ into the gas inlet chamber γ, and forms (generates) a swirl flow (vortex flow) around the center line of the cylindrical portion 24 in the gas in the gas inlet chamber γ.

[0091] As shown in Figure 14, the swirling gas Q formed in the gas inlet chamber γ (gas Q flowing out into the gas inlet chamber γ) flows through the gas inlet chamber γ toward the gas throttling flow path β while swirling around the center line of the cylindrical portion 24 along the outer surface 24a of the cylindrical portion 24 and the inner surface 4a of the gas inlet hole 4 (inner surface 12a, 13a of the second and third gas inlet holes 12, 13), and is then discharged into the gas throttling flow path β.

[0092] As shown in Figure 24, the swirling flow of gas Q (gas Q flowing into the gas throttling flow path β) flows along the conical side surface 22C of the truncated cone portion 22 and the conical inner surface 5a of the gas throttling hole 5, swirling around the center line of the truncated cone portion 22, and flows through the gas throttling flow path β (between the conical inner surface 5a of the gas throttling hole 5 and the conical side surface 22C of the truncated cone portion 22) from the gas inlet chamber γ (gas inlet hole 4, third gas inlet hole 13) towards the gas injection flow path α (gas injection hole 3), and then flows into the gas injection flow path α. The swirling flow of gas Q (gas Q flowing out into the gas throttling flow path β) flows through the gas throttling flow path β and into the gas injection flow path α, gradually increasing its flow rate from the gas inlet chamber γ (gas inlet hole 4, third gas inlet hole 13) toward the gas injection flow path α (gas injection hole 3).

[0093] 24, the gas throttling flow path β causes the gas Q flowing out of the gas inlet chamber γ (gas inlet flow path) to flow along the conical inner circumferential surface 5a of the gas throttling hole 5 and the conical side surface 22C of the truncated cone portion 22 while circulating around the truncated cone center line of the truncated cone portion 22, and causes the gas to flow into the gas injection flow path α. The gas throttling flow path β causes the gas Q flowing out of the gas inlet chamber γ to flow from the gas inlet chamber γ toward the gas injection flow path α while gradually increasing the flow velocity, and causes the gas Q to flow into the gas injection flow path α.

[0094] As shown in Figure 24, the swirling flow of gas Q (gas Q flowing into the gas injection flow path α) flows through the gas injection flow path α from the gas throttling flow path β (gas throttling hole 5) toward the injection port 3A while swirling around the pipe center line of the cylindrical pipe section 23 along the inner surface 3a of the gas injection hole 3 and the outer surface 23a of the cylindrical pipe section 23, and is injected from the injection port 3A (injection port 3A between the inner surface 3a of the gas injection hole 3 and the outer surface 23a of the cylindrical pipe section 23) to the outside of the gas nozzle Y (gas nozzle main body 1).

[0095] As shown in Figure 24, the gas injection flow path α causes the gas Q (swirling flow of gas Q) flowing in from the gas throttling flow path β to flow along the inner surface 3a of the gas injection hole 3 and the outer surface 23a of the cylindrical pipe portion 23 (on one of the pipe end surfaces 23A) while swirling around the pipe center line of the cylindrical pipe portion 23, and injects the gas Q from the injection port 3A (the injection port 3A between the inner surface 3a of the gas injection hole 3 and the outer surface 23a of the cylindrical pipe portion 23) to the outside of the gas nozzle Y (fine mist generating nozzle X).

[0096] 24, the gas Q (swirl flow gas Q) injected from the nozzle 3A flows from the nozzle 3A toward the other pipe end face 23B of the cylindrical pipe portion 23 while swirling around the pipe center line of the cylindrical pipe portion 23 along the outer peripheral surface 23a of the cylindrical pipe portion 23 (on the other pipe end face 23B side) protruding from the nozzle 3A in the direction E of the pipe center line e of the cylindrical pipe portion 23, and forms a swirling airflow N (vortex airflow) near the other pipe end face 23B of the cylindrical pipe portion 23. The swirling airflow N (vortex airflow) flows while swirling from the other pipe end face 23A of the cylindrical pipe portion 23 in the direction E of the pipe center line e of the cylindrical pipe portion 23, and is formed in a direction away from the other pipe end face 23B of the cylindrical pipe portion 23 (injection nozzle 3A). The swirling airflow N (vortex airflow) is formed by surrounding the liquid mist (liquid droplets, water droplets) sprayed from the other pipe end surface 23B (mist spraying hole 26) of the cylindrical pipe portion 23.

[0097] 24, the gas Q of the swirling air current collides with the liquid mist (liquid droplets, water droplets) sprayed from the cylindrical pipe portion 23 (mist spray holes 26), and subdivides the liquid mist sprayed from the cylindrical pipe portion 23, generating (forming) a fine mist. The gas of the swirling air current collides with the liquid mist (liquid droplets, water droplets) sprayed from the cylindrical pipe portion 23 (mist spray holes 26), and subdivides the gas mist, while mixing and dissolving into the fine mist as fine bubbles and ultra-fine bubbles, generating (forming) a fine mist (fine liquid droplets, fine water droplets) into which the fine bubbles and ultra-fine bubbles have been mixed and dissolved.

[0098] The fine mist generating nozzle X can generate (form) a fine mist in which fine bubbles and ultra-fine bubbles are mixed and dissolved by colliding a swirling airflow N (gas of the swirling airflow) with the mist M sprayed from the cylindrical pipe portion 23 (mist spray hole 26), thereby subdividing the liquid mist sprayed from the cylindrical pipe portion 23. The fine mist generating nozzle X can increase the volatility of the liquid mist sprayed from the cylindrical pipe portion 23 by colliding a swirling airflow N (gas of the swirling airflow) with the mist M sprayed from the cylindrical pipe portion 23 (mist spray hole 26), thereby subdividing (dividing) the liquid mist sprayed from the cylindrical pipe portion 23 into fine mist. [Industrial Applicability]

[0099] The present invention is ideal for generating a fine mist. [Explanation of symbols]

[0100] X Fine mist generating nozzle Y Gas Nozzle Z Mist Nozzle U swirl flow forming body 1 Gas nozzle body 3 Gas injection holes 4 Gas inlet hole 5 Gas throttle hole 21 Mist nozzle body 22 Cone truncated part 23 Cylindrical pipe section 24 Cylindrical part α Gas injection channel β Gas restriction channel γ Gas inlet chamber (gas inlet flow path)

Claims

[Claim 1] The mist nozzle has a mist nozzle body, a gas guide body has a guide body and a plurality of gas guide holes into which gas flows, and a swirl flow forming body has a cylindrical body and a plurality of fins, The gas nozzle body includes: a gas injection hole formed in a circular shape and having an injection port opening on a surface of the gas nozzle body; a gas inlet hole arranged concentrically with the gas injection hole and into which gas is introduced; a gas throttle hole that is concentric with the gas injection hole, that is disposed between the gas injection hole and the gas inlet hole, that is formed continuously with the gas injection hole and the gas inlet hole, and that is formed in the shape of a truncated cone whose diameter gradually decreases from the gas inlet hole toward the gas injection hole, The mist nozzle body is A truncated cone portion; a cylindrical pipe portion that is arranged concentrically with the truncated cone portion, that is fixed to the truncated cone portion with one pipe end surface abutting against an upper surface of the truncated cone portion, and that has a mist injection hole for injecting a mist of liquid; a cylindrical portion that is arranged concentrically with the truncated cone portion, has one cylindrical end surface abutting on a bottom surface of the truncated cone portion and is fixed to the truncated cone portion, and has a liquid inlet hole through which a liquid is introduced; The mist injection hole is the other end surface of the cylindrical pipe portion is opened and communicates with the liquid inlet hole; The cylindrical tube portion is a nozzle hole that is inserted into the gas injection hole and is concentric with the gas injection hole; the other end surface of the cylindrical pipe portion is inserted into the gas injection hole while protruding from the injection port to the outside of the gas nozzle body, an annular gas injection flow path is formed between an outer peripheral surface of the cylindrical pipe portion and an inner peripheral surface of the gas injection hole; The truncated cone portion is and inserted into the gas throttling hole concentrically with the gas throttling hole, an annular gas throttle flow path is formed between the conical side surface of the truncated cone portion and the conical inner peripheral surface of the gas throttle hole; The cylindrical portion is The gas inlet hole is inserted into the gas inlet hole so as to be concentric with the gas inlet hole, The cylindrical portion is disposed with a gap between an outer peripheral surface thereof and an inner peripheral surface of the gas inlet hole, The guide body is the gas inlet hole is disposed between an inner peripheral surface of the gas inlet hole and an outer peripheral surface of the cylindrical portion in a circumferential direction of the gas inlet hole, and is fixed to the cylindrical portion; Each of the gas guide holes is The gas guide holes are arranged at intervals of a hole angle in the circumferential direction of the cylindrical portion, a guide body extending in the direction of the cylindrical center line of the cylindrical portion; Each of the fins is The fins are arranged at intervals of a fin angle in the circumferential direction of the tube body, the cylindrical body is disposed between the cylindrical end surfaces at an inclination angle in a horizontal direction perpendicular to the cylindrical center line of the cylindrical body, In the radial direction of the cylindrical body, the fin protrudes from the inner peripheral surface of the cylindrical body toward the cylindrical center line of the cylindrical body with a fin width, The cylindrical body includes: The cylindrical portion is concentrically arranged, a fin width end surface of each fin abutting against an outer peripheral surface of the cylindrical portion, the fin being fitted to the cylindrical portion, and being disposed on the cylindrical portion between one of the cylindrical end surfaces of the cylindrical portion and the guide body; a gas throttle hole provided between the inner peripheral surface of the gas inlet hole and the outer peripheral surface of the cylindrical portion, the gas throttle hole being disposed in the circumferential direction of the gas inlet hole, and forming an annular gas inlet chamber in the gas inlet hole between the gas throttle hole and the outer peripheral surface of the cylindrical portion; The tube body, the fins, and the cylindrical portion are a gas outflow passage is formed between the inner peripheral surface of the tube body, each of the fins, and the outer peripheral surface of the cylindrical portion; Each of the gas outflow paths is communicated with the gas inlet chamber, Corresponding to each of the gas guide holes, the gas guide holes are communicated with each of the gas guide holes, The swirl flow-forming body is The gas is discharged from each of the gas outlet passages into the gas inlet chamber, and a swirling flow around the center line of the cylindrical portion is formed in the gas inlet chamber. A fine mist generating nozzle characterized by:

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