Fine mist generating nozzle

Abstract

The present invention provides a fine mist generating nozzle that produces a fine mist. [Solution] The present invention comprises a gas nozzle, a mist nozzle, and a swirling 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 tube portion inserted into the gas injection hole and forming an annular gas injection flow path between itself and the gas injection hole, a frustoconical portion inserted into the gas throttling hole and forming an annular gas throttling flow path between itself and the gas throttling hole, and a cylindrical portion inserted into the gas inlet hole and forming an annular gas inlet chamber between itself and the gas inlet hole. The cylindrical tube portion has a mist injection hole for spraying mist. The cylindrical portion has a liquid inlet hole into which liquid flows and which communicates with the mist injection hole. The swirling flow forming body discharges gas into the gas inlet chamber and forms a swirling flow around the centerline of the cylindrical portion in the gas in the gas inlet chamber.

Description

Technical Field

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

Background Art

[0002] As a technique for generating mist, Patent Document 1 discloses a spray nozzle. The spray nozzle has an injection port and a gas supply passage. The injection nozzle injects mist-like liquid from the injection port. The injection nozzle injects compressed gas from the gas supply passage around the mist-like liquid injected from the injection port. The spray nozzle suppresses the vortex flow generated around the injection port by injecting the compressed gas around the mist-like liquid without contacting the mist-like liquid injected from the injection port.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems 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 fine mist. [[ID=3G]]

[0005] An object of the present invention is to provide a fine mist generating nozzle that can subdivide the mist of the injected liquid to generate fine mist.

Means for Solving the Problems

[0006] The present invention comprises a gas nozzle having a gas nozzle body, a mist nozzle having a mist nozzle body, and a swirling flow forming body into which gas is introduced. The gas nozzle body is formed in a circular shape and has a gas injection hole having an injection port opening on the surface of the gas nozzle body, a gas inlet hole concentrically positioned with the gas injection hole into which gas is introduced, and a swirling flow forming body concentrically positioned with the gas injection hole and the gas inlet hole, formed continuously with the gas injection hole and the gas inlet hole, and extending from the gas inlet hole forward. The mist nozzle body has a gas throttling hole formed in a frustoconical shape that gradually narrows in diameter toward the gas injection hole, and the mist nozzle body has a frustoconical portion, a cylindrical tube portion that is concentric with the frustoconical portion and fixed to the frustoconical portion by having one end face in contact with the upper surface of the frustoconical portion and has a mist injection hole for spraying liquid mist, and a cylindrical portion that is concentric with the frustoconical portion and fixed to the frustoconical portion by having one end face in contact with the bottom surface of the frustoconical portion and has a liquid inlet hole into which liquid flows, and the mist injection hole is the An opening is made at the other end face of the cylindrical tube portion and communicates with the liquid inlet hole, the cylindrical tube portion is inserted into the gas injection hole concentrically with the gas injection hole, the other end face of the cylindrical tube portion protrudes from the nozzle opening to the outside of the gas nozzle body and is inserted into the gas injection hole, forming an annular gas injection channel between the outer surface of the cylindrical tube portion and the inner surface of the gas injection hole, the frustoconical portion is inserted into the gas throttling hole concentrically with the gas throttling hole, and an annular gas injection channel is formed between the conical side surface of the frustoconical portion and the conical inner surface of the gas throttling hole. This fine mist generating nozzle is characterized by forming a gas throttling channel in a shape, the cylindrical portion being inserted into the gas inlet hole concentrically with the gas inlet hole, and being positioned with a gap between the outer surface of the cylindrical portion and the gas inlet hole, and the swirling forming body being positioned between the inner surface of the gas inlet hole and the outer surface of the cylindrical portion, forming an annular gas inlet chamber between the gas inlet hole and the gas throttling hole, causing gas to flow out into the gas inlet chamber and forming a swirling flow around the centerline of the cylindrical portion in the gas inlet chamber. [Effects of the Invention]

[0007] This invention generates fine mist by causing a swirling airflow to collide with the liquid mist ejected from the mist injection holes, thereby subdividing the liquid ejected from the mist injection holes. [Brief explanation of the drawing]

[0008] [Figure 1] This is a top-down perspective view showing the fine mist generating nozzle. [Figure 2] This is a perspective view from below showing the fine mist generating nozzle. [Figure 3] This is a front view showing the fine mist generating nozzle. [Figure 4] This is a left side view showing the fine mist generating nozzle. [Figure 5] This is a cross-sectional view AA in Figure 4. [Figure 6] This is an enlarged view of section C in Figure 5. [Figure 7] Figure 4 is an enlarged cross-sectional view of BB. [Figure 8] (a) is a perspective view from above showing the gas nozzle, and (b) is a perspective view from below showing the gas nozzle. [Figure 9] (a) is a plan view showing the gas nozzle, and (b) is a cross-sectional view of Figure 9(a) from the DD side. [Figure 10] (a) is a perspective view from above showing the nozzle cap, and (b) is a bottom view showing the nozzle cap. [Figure 11] This is a cross-sectional view of EE in Figure 10(b). [Figure 12] This is a top-down perspective view showing the mist nozzle and gas guide. [Figure 13] This is a plan view showing the mist nozzle and gas guide. [Figure 14] This is a bottom view showing the mist nozzle and gas guide. [Figure 15] Figure 13 is a cross-sectional view of the FF. [Figure 16] This is an enlarged view of section G in Figure 15. [Figure 17](a) is a perspective view of the swirling flow forming body as seen from above, and (b) is a perspective view of the swirling flow forming body as seen from below. [Figure 18] (a) is a plan view of the swirling flow forming body, and (b) is a bottom view of the swirling flow forming body. [Figure 19] It is a sectional view taken along the line H-H of FIG. 18(b). [Figure 20] It is a view showing the swirling flow forming body, and is a perspective view of the inclined state of the fins (inclined plates) as seen from above. [Figure 21] (a) is a perspective view of the fluid introducer as seen from above, and (b) is a plan view of the fluid introducer. [Figure 22] (a) is a bottom view of the fluid introducer, and (b) is a sectional view taken along the line I-I of FIG. 17(b). [Figure 23] It is a sectional view taken along the line A-A of FIG. 4, and shows the flow of liquid and gas. [Figure 24] It is an enlarged view of the J part of FIG. 23. [Figure 25] It is a partially enlarged sectional view taken along the line B-B of FIG. 4, and shows the gas flow (swirling flow).

Embodiments for Carrying Out the Invention

[0009] The fine mist generating nozzle according to the present invention will be described with reference to FIGS. 1 to 25.

[0010] In FIGS. | to 25, the fine mist generating nozzle X is a two-fluid nozzle, and generates fine mist in which fine bubbles and ultrafine bubbles are mixed and dissolved. The fine mist generating nozzle X includes a gas nozzle Y (air nozzle), a mist nozzle Z, a swirling flow forming body U, a fluid introducer V, a gas guide 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 body 1, a nozzle cap 2 (nozzle connection body), and a flange portion 6. <00001​As shown in Figures 8 and 9, the gas nozzle body 1 is formed in a three-dimensional shape having a surface 1A, a back surface 1B, and a side surface 1C (outer peripheral surface) between the surface 1A and the back surface 1B. For example, it is formed in a cylindrical shape having each column end surface 1A, 1B and each column end surface 1A, 1B with a side surface 1C between them. The gas nozzle body 1 has a gas injection hole 3, a gas inlet hole 4, and a gas throttling hole 5.

[0013] As shown in Figures 8 and 9, the gas injection hole 3 is formed in a circular shape (circular hole). The gas injection hole 3 is formed in the gas nozzle body 1 such that the centerline a of the gas injection hole 3 coincides with the centerline b (column centerline / cylinder centerline) of the gas nozzle body 1. The gas injection hole 3 has an injection port 3A that opens onto the surface 1A (one column end face / one cylinder end face) of the gas nozzle body 1. The gas injection hole 3 is formed in the gas nozzle body 1 such that, in the direction B of the centerline b of the gas nozzle body 1, the hole length extends from the surface 1A to the back surface 1B of the gas nozzle body 1.

[0014] The gas inlet hole 4 is through which gas is introduced. As shown in Figures 8 and 9, the gas inlet hole 4 is formed in the gas nozzle body 1 and is concentric with the gas injection hole 3. The gas inlet hole 4 opens on the back surface 1B (the other column end surface / the other cylindrical end surface) of the gas nozzle body 1 in the direction B of the centerline b of the gas nozzle body 1. The gas inlet hole 4 is positioned between the back surface 1B of the gas nozzle body 1 and the gas injection hole 3 in the direction B of the centerline b of the gas nozzle body 1.

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

[0016] As shown in Figures 8(b) and 9(b), the first gas inlet hole 11 is formed as a circular hole with a diameter larger than the 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 centerline b of the gas nozzle body 1, the hole length is from the back surface 1B of the gas nozzle body 1 toward the gas injection hole 3.

[0017] The second gas inlet 12 is formed in the shape of a frustocone (cone), as shown in Figures 8(b) and 9(b). The second gas inlet 12 is formed in the gas nozzle body 1 concentrically with the gas injection hole 3 (first gas inlet 11). The second gas inlet 12 is positioned between the first gas inlet 11 and the gas injection hole 3 (third gas inlet 13) in the direction B of the centerline b of the gas nozzle body 1, and is formed continuously with the first gas inlet 11. The second gas inlet 12 is formed in the shape of a frustocone (cone hole / frustocone hole) that gradually decreases in diameter from the first gas inlet 11 toward the gas injection hole 3 (third gas inlet 13) in the direction B of the centerline b of the gas nozzle body 1.

[0018] As shown in Figures 8(b) and 9(b), the third gas inlet 13 is formed as a circular hole with a diameter smaller than that of the first gas inlet 11 and larger than that of the gas injection hole 3. The third gas inlet 13 is formed in the gas nozzle body 1 concentrically with the gas injection hole 3 (second gas inlet 12). The third gas inlet 13 is positioned between the second gas inlet 12 and the gas injection hole 3 (gas throttling hole 5) in the direction B of the centerline b of the gas nozzle body 1, and is formed continuously with the second gas inlet 12. The third gas inlet 13 has a length (the length between the second gas inlet 12 and the gas throttling hole 5) extending from the second gas inlet 12 toward the gas injection hole 3 side (gas throttling hole 5 side) in the direction B of the centerline 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 positioned between the gas injection hole 3 and the gas inlet hole 4 (third gas inlet hole 13) in the direction B of the centerline b of the gas nozzle body 1. The gas throttling hole 5 is formed continuously with the gas injection hole 3 and the gas inlet hole 4 (third gas inlet hole 13). In the direction B of the centerline b of the gas nozzle body 1, the gas throttling hole 5 is formed as a frustocone (frustocone hole / cone hole) that gradually decreases in diameter from the gas inlet hole 4 (third gas inlet hole 13) toward the gas injection hole 3. The gas throttling hole 5 is formed in the shape of a frustocone (frustocone) with a first angle θ1 (first acute angle) between the hole's centerline c and the inner surface 5a (inner surface of the hole). The first angle θ1 is, for example, 45 degrees (45°).

[0020] As shown in Figures 8 and 9, the flange portion 6 is positioned on the back surface 1B side of the gas nozzle body 1. The flange portion 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 portion 6 is positioned along the circumferential direction of the gas nozzle body 1.

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

[0022] The cap body 15 is formed in a cylindrical shape, as shown in Figures 10 and 11. The cap body 15 has a female threaded portion 17 (female thread). The female threaded portion 17 is located on one end face 15A side (cap end face side) in the direction of the centerline of the cap body 15. The female threaded portion 17 is formed on the inner circumferential surface 15a of the cap body 15.

[0023] As shown in Figures 10 and 11, the cap flange 16 is positioned on the other end face 15B side of the cap body 15 in the direction of the centerline of the cap body 15 and is fixed to the cap body 15. The cap flange 16 protrudes from the inner circumferential surface 15a of the cap body 15 toward the centerline of the cap body in the direction perpendicular to the centerline of the cap body 15 (radial direction) and is positioned inside the cap body 15.

[0024] The mist nozzle Z sprays liquid mist (liquid droplets, water droplets). The mist nozzle Z sprays liquid in a mist form. As shown in Figures 12 to 16, the mist nozzle Z has a mist nozzle body 21.

[0025] As shown in Figures 12 to 16, the mist nozzle body 21 has a frustoconical portion 22, a cylindrical tube portion 23 (mist nozzle portion), and a cylindrical portion 24.

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

[0027] As shown in Figure 16, the liquid flow hole 25 is formed in a circular shape (circular hole) and is positioned concentrically with the frustoconical portion 22. The liquid flow hole 25 extends in the direction D of the center line d (center line) of the frustoconical portion 22 and opens onto the upper surface 22A (upper surface of the frustoconical portion 22).

[0028] As shown in Figures 12, 13, 15, and 16, the cylindrical tube section 23 is positioned concentrically with the frustoconical section 22, with its centerline e coinciding with the centerline d (centerline of the cone) of the frustoconical section 22. The cylindrical tube section 23 has one end face 23A and the other end face 23B (each end face 23A, 23B) in the direction E of the centerline e. The cylindrical tube section 23 is fixed to the frustoconical section 22 by having one end face 23A abut against the upper surface 22A of the frustoconical section 22. The outer diameter of the cylindrical tube section 23 is the same as the diameter of the upper surface 22A of the frustoconical section 22. The outer diameter of the cylindrical tube section 23 is smaller than the diameter of the gas injection hole 3.

[0029] As shown in Figures 12, 13, 15, and 16, the cylindrical tube section 23 is formed in a cylindrical shape and has mist injection holes 26 for spraying liquid mist (liquid droplets, water droplets). The mist injection holes 26 are formed in a circular shape (circular hole) with the same hole diameter as the liquid flow hole 25 and are arranged concentrically with the cylindrical tube section 23 (liquid flow hole 25). The mist injection holes 26 penetrate the cylindrical tube section 23 in the direction of the tube centerline e of the cylindrical tube section 23 and open at each tube end face 23A, 23B. The mist injection holes 26 are in communication with the liquid flow hole 25.

[0030] As shown in Figures 12 to 16, the cylindrical portion 24 is formed in a cylindrical shape, and its centerline f coincides with the centerline d of the frustoconical portion 22, so that it is concentric with the frustoconical portion 22. The cylindrical portion 24 has one end face 24A and the other end face 24B (each end face 24A, 24B) in the direction F of the centerline f. The cylindrical portion 24 is fixed to the frustoconical portion 22 by having one end face 24A abut against the bottom surface 22B of the frustoconical portion 22. The outer diameter of the cylindrical portion 24 is the same as the diameter of the bottom surface 22B of the frustoconical portion 22.

[0031] As shown in Figures 14 to 16, the cylindrical portion 24 has a liquid inlet hole 27 into which liquid flows. The liquid inlet hole 27 is formed as a circle (circular hole) with a larger diameter than the mist injection hole 26 (liquid flow hole 25) and is arranged concentrically with the cylindrical portion 24 (liquid flow hole 25, mist injection hole 26). The liquid inlet hole 27 penetrates the cylindrical portion 24 in the direction of the cylindrical centerline f of the cylindrical portion 24 and opens at each cylindrical end face 24A, 24B of the cylindrical portion 24. The liquid inlet hole 27 communicates with the liquid flow hole 25. The liquid inlet hole 27 communicates with the mist injection hole 26 through the liquid flow hole 25.

[0032] As shown in Figure 16, the mist injection hole 26 is opened on the other end face 23B of the cylindrical pipe section 23 and communicates with the liquid inlet hole 27. The mist injection hole 26 communicates with the liquid inlet hole 27 through the liquid flow hole 25.

[0033] As shown in Figures 17 to 20, the swirling flow forming body U has a cylindrical body 31 (fin support cylinder) and a plurality of (for example, 6) fins 32 (inclined plates).

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

[0035] Each fin 32 (inclined plate) is formed in a plate shape, as shown in Figures 17 to 20. Each fin 32 is arranged (formed) on the cylindrical body 31. As shown in Figure 18(a), each fin 32 is arranged in the circumferential direction of the cylindrical body 31 with a fin angle θA (angle between plates / equal angle) between them. As shown in Figures 19 and 20, each fin 32 is arranged between the cylindrical end faces 31A and 31B of the cylindrical body 31 with an inclination angle θB (acute angle) in the horizontal direction H (hereinafter referred to as "horizontal direction H") perpendicular to the cylindrical centerline g of the cylindrical body 31. Each fin 32 is inclined in the circumferential direction of the cylindrical body 31 with the same inclination angle θB. The inclination angle θB is, for example, 30 degrees or more and 70 degrees or less.

[0036] Each fin 32 (inclined plate) is fixed (connected) to the inner circumferential surface 31b (inner circumference) of the cylindrical body 31, as shown in Figures 17 to 20. Each fin 32 protrudes radially from the inner circumferential surface 31b of the cylindrical body 31 toward the cylinder centerline g, having a fin width Fh (plate width). Each fin 32 has a fin length Fl (plate length) in the inclined direction S (hereinafter referred to as "inclination direction S") between the cylinder end faces 31A and 31B of the cylindrical body 31, and is positioned between the cylinder end faces 31A and 31B of the cylindrical body 31. Each fin 32 is positioned radially from the fin width end 32a (plate width end) of the fin 32 to the cylinder centerline g of the cylindrical body 31, with a gap between them.

[0037] Each fin 32 (inclined plate) has a fin thickness (plate thickness) in the fin thickness direction T, which is perpendicular to the inclination direction S, as shown in Figures 19 and 20. Each fin 32 has a fin front surface 32A (fin surface) and a fin back surface 32B (fin back surface) in the fin thickness direction T (plate thickness direction). The fin front surface 32A has an inclination angle θB in the horizontal direction H and is formed on one end surface 31A side of the cylindrical body 31. The fin front surface 32A (inclined surface) is formed toward one end surface 31A of the cylindrical body 31. The fin back surface 32B (inclined back surface) has an inclination angle θB in the horizontal direction H and is formed on the other end surface 31B side of the cylindrical body 31. The fin back surface 32B is positioned toward the other end surface 31B of the cylindrical body 31. The fin back surface 32B is positioned parallel to the fin front surface 32A.

[0038] As shown in Figures 21 and 22, the fluid introduction body V (fluid supply body) has a fluid introduction cylinder portion 41 (fluid supply cylinder portion), a closure portion 42, a gas supply hole 43, and a liquid supply hole 44.

[0039] The fluid introduction cylinder portion 41 is formed in a cylindrical shape, as shown in Figures 21 and 22. The fluid introduction cylinder portion 41 has a gas introduction hole 45, a male threaded portion 46, and a female threaded portion 47.

[0040] As shown in Figures 17 and 18, the gas inlet hole 45 is positioned concentrically with the fluid inlet cylinder 41. The gas inlet hole 45 penetrates the fluid inlet cylinder 41 in the direction I of the cylinder centerline i of the fluid inlet cylinder 41 and opens into one end face 41A and the other end face 41B (each end face 41A, 41B) of the fluid inlet cylinder 41.

[0041] The male threaded portion 46 (male thread) is located on one end face 41A of the fluid introduction cylinder portion 41, as shown in Figures 21 and 22(b). The male threaded portion 46 is formed on the outer circumferential surface 41a of the fluid introduction cylinder portion 41. The female threaded portion 47 (female thread) is located on one end face 41A of the fluid introduction cylinder portion 41, as shown in Figures 21(b) and 22(b). The female threaded portion 47 is formed on the inner circumferential surface (inner circumferential surface 45a of the gas introduction hole 45) of the fluid introduction cylinder portion 41.

[0042] As shown in Figure 22, the blocking portion 42 blocks the other end face 41B of the fluid introduction cylinder portion 41 and is fixed to the fluid introduction cylinder portion 41.

[0043] The gas supply hole 43 is formed in the fluid introduction cylinder portion 41, as shown in Figures 21(a) and 21(b). The gas supply hole 43 is located on the other end face 41B side of the fluid introduction cylinder portion 41. The gas supply hole 43 penetrates the fluid introduction cylinder portion 41 in a direction perpendicular to the cylinder centerline i of the fluid introduction cylinder portion 41 (radial direction) and opens into the outer circumferential surface 41a and inner circumferential surface (inner circumferential surface 45a of the gas supply hole 45) of the fluid introduction cylinder portion 41. The gas supply hole 43 penetrates the fluid introduction cylinder portion 41 and opens into the fluid introduction cylinder portion 41 (inside the gas supply hole 45).

[0044] As shown in Figures 21(b) and 22, the liquid supply hole 44 is formed in the closure portion 42 concentrically with the fluid introduction cylinder portion 41. The liquid supply hole 44 penetrates the closure portion 42 in the direction I of the cylinder centerline i of the fluid introduction cylinder portion 41 and opens into the gas introduction hole 45 (inside the fluid introduction cylinder portion 41).

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

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

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

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

[0049] The guide cylinder portion 56 is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the storage cylinder portion 54 and larger than the outer diameter of the cylindrical portion 24. As shown in Figures 12, 14 to 16, the guide cylinder portion 56 has one end face 56A and the other end face 56B (each end face) in the direction L of the cylinder centerline l of the guide cylinder portion 56. The guide cylinder portion 56 is arranged concentrically with the storage cylinder portion 54 (guide closure portion 55). The guide cylinder portion 56 is fixed to the guide closure portion 55 by contacting one end face 56A with the back surface 55B of the plate of the guide closure portion 55. The guide cylinder portion 56 has a male screw portion 57. The male screw portion 57 (male screw) is located on the other end face 56B side of the guide cylinder portion 56. The male screw portion 57 is formed on the outer surface of the guide cylinder portion 56.

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

[0051] As shown in Figures 12 to 16, each gas guide hole 52 penetrates the guide closure portion 55 and the guide cylinder portion 56 (guide body 51) in the direction of the centerline k of the guide closure portion 55 (direction L of the centerline l of the guide cylinder portion 56), and opens to the plate surface 55A of the guide closure portion 55 and the other end surface 56B of the guide cylinder portion 56.

[0052] The gas guide W (guide body 51) is fixed to the mist nozzle Z (mist nozzle body 21) as shown in Figures 12 to 16.

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

[0054] As shown in Figures 12 to 16, the guide body 51 (gas guide W) is positioned by fitting the storage cylinder portion 54, the guide closing portion 55, and the guide cylinder portion 56 onto the cylindrical portion 24. The guide body 51 (gas guide W) is positioned on the mist nozzle body 21 (mist nozzle Z) by fixing the guide closing portion 55 and the guide cylinder portion 56 to the cylindrical portion 24 by contacting the inner circumferential surface 55b of the guide closing portion 55 and the inner circumferential surface 56b of the guide cylinder portion 56 with the outer circumferential surface 24a of the cylindrical portion 24. The guide body 51 (gas guide W) is fixed to the cylindrical portion 24 (mist nozzle body 21) with a gap δ between the other end surface 54B (guide body 51) of the storage cylinder portion 54 and the one end surface 24A of the cylindrical portion 24 in the direction F of the cylinder centerline f of the cylindrical portion 24.

[0055] In the fine mist generating nozzle X, the mist nozzle Z (mist nozzle body 21) is positioned 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] As shown in Figure 6, the mist nozzle Z (mist nozzle body 21) is positioned on the gas nozzle body 1 (gas nozzle Y) by inserting the cylindrical tube portion 23 from the gas throttling hole 5 into the gas injection hole 3, inserting the frustoconical portion 22 from the gas inlet hole 4 into the gas throttling hole 5, and inserting the cylindrical portion 24 (one end face 24B side) from the back surface 1B of the gas nozzle body 1 into the gas inlet hole 4 (the first to third gas inlet holes 11 to 13). The other end face 23B of the cylindrical tube portion 23 (the other end face 23B side) of the mist nozzle Z (mist nozzle body 21) protrudes from the injection port 3A (gas injection hole 3) to the outside of the gas nozzle Y (gas nozzle body 1). The mist nozzle Z (mist nozzle body 21) is positioned on the gas nozzle body 1 (gas nozzle Y) with the other end face 24B of the cylindrical portion 24 protruding from the gas inlet hole 4 (first gas inlet hole 11) to the outside of the gas nozzle body 1.

[0057] As shown in Figure 6, the cylindrical tube section 23 is positioned concentrically with the gas injection hole 3, with its tube centerline e coinciding with the hole centerline a. The cylindrical tube section 23 (one end face 23A) is inserted into the gas injection hole 3 from the gas throttling hole 5, concentric with the gas injection hole 3. The cylindrical tube section 23 (one end face 23A) is inserted (positioned) into the gas injection hole 3 with a gap between the outer surface 23a of the cylindrical tube section 23 and the inner surface 3a of the gas injection hole 3, along the circumferential direction of the gas injection hole 3. The other end face 23B of the cylindrical tube section 23 (the other end face 23B) is positioned to protrude outside the gas nozzle body 1 from the gas injection hole 3 (injection port 3A).

[0058] As shown in Figure 6, the cylindrical tube section 23 (on one end face 23A) forms an annular (ring-shaped) gas injection channel α between the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical tube section 23, extending circumferentially around the gas injection hole 3. The gas injection channel α is formed in an annular (ring-shaped) manner between the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical tube section 23, extending circumferentially around the gas injection hole 3.

[0059] As shown in Figure 6, the frustoconical portion 22 is positioned concentrically with the gas throttling hole 5, with its centerline d coinciding with the centerline c of the gas throttling hole 5. The frustoconical portion 22 is inserted into the gas throttling hole 5 from the gas inlet hole 4, concentric with the gas throttling hole 5. The frustoconical portion 22 is inserted (positioned) into the gas throttling hole 5 with a gap between the conical side surface 22C of the frustoconical portion 22 and the inner conical surface 5a of the gas throttling hole 5, along the circumferential direction of the gas throttling hole 5.

[0060] As shown in Figure 6, the frustoconical portion 22 forms an annular gas throttling channel β between the inner cone surface 5a of the gas throttling hole 5 and the conical side surface 22C of the frustoconical portion 22, extending circumferentially around the gas throttling hole 5. The gas throttling channel β is formed annularly between the inner cone surface 5a of the gas throttling hole 5 and the conical side surface 22C of the frustoconical portion 22, extending circumferentially around the gas throttling hole 5, and communicates with the gas injection channel α. The gas throttling channel β gradually narrows in the direction of the centerline c of the gas throttling hole 5 (the direction of the centerline b of the gas nozzle body 1) from the gas inlet hole 4 (third gas inlet hole 13) toward the gas injection channel α, and is connected to the gas injection channel α.

[0061] As shown in Figure 6, the cylindrical portion 24 (on one end face 24B) is positioned concentrically with the gas inlet holes 4 (the first to third gas inlet holes 11 to 13), with its cylinder centerline f coinciding with the centerline of the gas inlet holes 4. The cylindrical portion 24 (on one end face 24A) is inserted into the gas inlet holes 4 from the back surface 1B of the gas nozzle body 1, concentrically with the gas inlet holes 4. The cylindrical portion 24 (one end face 24A) is inserted (positioned) into the gas inlet holes 4 (the first to third gas inlet holes 11 to 13) with a gap between the outer surface 24a of the cylindrical portion 24 and the inner circumferential surfaces 4a of the gas inlet holes 4 (the inner circumferential surfaces 11a to 13a of the first to third gas inlet holes 11 to 13) along the circumferential direction of the gas inlet holes 4. The other end face 24B of the cylindrical portion 24 is positioned to protrude from the gas inlet hole 4 (the first gas inlet hole 11) to the outside of the gas nozzle body 1.

[0062] As shown in Figure 6, the cylindrical portion 24 (on one end face 24A) forms an annular gas inlet chamber γ (gas inlet passage) between the outer circumferential surface 24a of the cylindrical portion 24 (on one end face 24A) and the inner circumferential surfaces 4a of the gas inlet holes 4 (inner circumferential surfaces 12a and 13a of the second and third gas inlet holes 12 and 13). The gas inlet chamber γ is connected to the gas throttling passage β.

[0063] As shown in Figures 5 and 6, the mist nozzle Z (mist nozzle body 21) has a cylindrical portion 24 (the other end face 24B side) that protrudes outward from the gas nozzle body 1, which is positioned concentrically with the fluid introduction body V (fluid introduction cylinder portion 41). The other end face 24B side of the cylindrical portion 24 is inserted into the fluid introduction cylinder portion 41 (gas introduction hole 45) and positioned within the fluid introduction body V (fluid introduction cylinder portion 41).

[0064] As shown in Figures 5 and 6, the cylindrical portion 24 (on the other end face 24B) is positioned concentrically with the gas inlet hole 45, with its cylinder centerline f coinciding with the cylinder centerline i of the fluid inlet cylinder 41 (the centerline of the gas inlet hole 45). The cylindrical portion 24 (on the other end face 24B) is inserted into the fluid inlet cylinder 41 (gas inlet hole 45) from one end face 41A, concentric with the fluid inlet cylinder 41 (gas inlet hole 45). The cylindrical portion 24 is inserted (positioned) into the gas inlet hole 45 (inside the fluid inlet cylinder 41) with its other end face 24B in contact with the closure portion 42 from inside the fluid inlet cylinder 41 (gas inlet hole 45), and its liquid inlet hole 27 communicating with the liquid supply hole 44. The cylindrical portion 24 is inserted (positioned) into the gas inlet hole 45 with a gap between the outer surface 24a of the cylindrical portion 24 and the inner surface 45a of the gas inlet hole 45 in the circumferential direction of the gas inlet hole 45.

[0065] As shown in Figures 5 and 6, the cylindrical portion 24 forms an annular (circular) gas introduction channel σ between the outer surface 24a of the cylindrical portion 24 and the inner surface 45a of the gas introduction hole 45, extending circumferentially around the gas introduction hole 45. The gas introduction channel σ is connected to the gas supply hole 43. The gas introduction channel σ is formed in an annular (circular) shape between the outer surface 24a of the cylindrical portion 24 and the inner surface 45a of the gas introduction hole 45, extending circumferentially around the gas introduction hole 45.

[0066] In the fine mist generating nozzle X, the gas guide W (guide body 51) is positioned 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 positioned concentrically with the gas injection hole 3, the gas inlet hole 4, and the gas throttling hole 5.

[0067] As shown in Figures 5 and 6, the gas guide W (guide body 51) is positioned so that the other end surface 54B of the storage cylinder 54 abuts against the gas nozzle body 1 from the back surface 1B of the gas nozzle body 1. The guide body 51 (guide closure portion 55) is positioned between the inner circumferential surface 4a of the gas inlet hole 4 (inner circumferential surface 11a of the first gas inlet hole 11) and the outer circumferential surface 24a of the cylindrical portion 24, and is fixed to the cylindrical portion 24 (mist nozzle body 21).

[0068] As shown in Figure 7, each gas guide hole 52 is positioned on a circle Cp with radius r1 centered on the cylindrical centerline f of the cylindrical portion 24 (centerline of the mist nozzle body 21). Each gas guide hole 52 is positioned in the circumferential direction of the cylindrical portion 24, separated by a hole angle θα. As shown in Figures 5 and 6, each gas guide hole 52 penetrates the guide body 51 (guide closure portion 55, guide cylinder portion 56) in the direction F of the cylindrical centerline f of the cylindrical portion 24 and communicates with the gas introduction channel σ.

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

[0070] As shown in Figures 5 and 6, the fluid introduction cylinder 41 is positioned concentrically with the cylindrical part 24, with its cylinder centerline i coinciding with the cylinder centerline f of the cylindrical part 24, and is fixed to the guide body 51 (mist nozzle body 21). The fluid introduction cylinder 41 is fitted onto the other cylinder end face 24B side of the cylindrical part 24, with one end face 41A facing the guide body 51 (storage cylinder 54, back surface 55B of the guide closure part 55). The fluid introduction cylinder 41 is fixed to the guide cylinder 56 (guide body 51) by inserting the guide cylinder 56 into the gas introduction hole 45 from one end face 41A and screwing the male threaded part 57 of the guide cylinder 56 into the female threaded part 47.

[0071] As shown in Figure 5, the gas supply hole 43 is connected to the gas introduction channel σ. As shown in Figure 5, the liquid supply hole 44 is connected to the other end face 24B of the cylindrical portion 24 and is connected to the liquid inlet hole 27.

[0072] As shown in Figures 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. As shown in Figures 2 and 5, the liquid supply pipe 66 is connected to the liquid supply hole 44 and a liquid supply source (not shown). 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 swirling flow forming body U (cylindrical body 31) is positioned concentrically with the gas nozzle Y (gas nozzle body 1) and the mist nozzle Z (mist nozzle body 21), as shown in Figures 5 to 7. The swirling flow forming body U (cylindrical body 31) is positioned between the gas nozzle Y (gas nozzle body 1) and the gas guide W (guide body 51) and is fixed to the gas nozzle body 1. The swirling flow forming body U (cylindrical body 31) is inserted into the gas inlet hole 4 (first gas inlet hole 11) and positioned in the gas nozzle body 1 (gas nozzle Y). The swirling flow forming body U (cylindrical body 31) is fitted onto the cylindrical portion 24 (one of the cylindrical end faces 24A) and positioned in the mist nozzle Z (mist nozzle body 21). The swirling flow forming body U is positioned between the inner circumferential surface 4a of the gas inlet hole 4 (the inner circumferential surface 11a of the first gas inlet hole 11) and the outer circumferential surface 24a of the cylindrical portion 24 (one end face 24A side), extending in the circumferential direction of the gas inlet hole 4 (the first gas inlet hole 11).

[0074] As shown in Figures 5 to 7, the cylindrical body 31 is positioned concentrically with the cylindrical portion 24 and the gas inlet hole 4 (first gas inlet hole 11), with its cylindrical centerline g coinciding with the cylindrical centerline 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 end surface 31A of the cylindrical portion 24 facing one end surface 24A (gas throttling 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 its outer peripheral surface 31a in contact with the inner peripheral surface 4a of the gas inlet hole 4 (inner peripheral surface 11a of the first gas inlet hole 11). The cylindrical body 31 is positioned between the inner circumferential surface 4a of the gas inlet hole 4 (the inner circumferential surface 11a of the first gas inlet hole 11) and the outer circumferential surface 24a of the cylindrical portion 24 (one end face 24A side) along the circumferential direction of the gas inlet hole 4. The cylindrical body 31 is fitted onto the cylindrical portion 24 from one end face 24A (cylindrical tube portion 23) of the cylindrical portion 24 and positioned in the cylindrical portion 24 between one end face 24A of the cylindrical portion 24 and the gas guide W (guide body 51 / guide closure portion 55).

[0075] As shown in Figures 6 and 7, the cylindrical body 31 is fitted onto the cylindrical portion 24 by having the fin width end faces 31c of each fin 32 (inclined plate) abut against the outer circumferential surface 24a of the cylindrical portion 24, and is positioned on one end face 24A side 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 housing cylindrical portion 54, and the other end face 31B abuts against the plate surface 55A of the guide closure portion 55, and is positioned on the gas guide W (guide body 51). The cylindrical body 31 (swirling flow forming body U) forms an annular gas inlet chamber γ between the gas inlet holes 4 (second and third gas inlet holes 12, 13) and the gas throttling hole 5 (gas throttling flow path β) in the direction F of the cylindrical centerline f of the cylindrical portion 24. The gas inlet chamber γ (gas inlet passage) is formed in an annular shape between the inner circumferential surface 4a of the gas inlet hole 4 (the inner circumferential surfaces 11a and 12a of the second and third gas inlet holes 11 and 12) and the outer circumferential surface 24a of the cylindrical portion 24, and is connected to the gas throttling passage β. The gas inlet chamber γ is formed in an annular shape over the circumferential direction of the gas inlet hole 4 (the second and third gas inlet holes 11 and 12). The guide body 51 is fixed to the cylindrical portion 24 with the cylindrical body 31 (swirling flow forming body U) positioned between it and the gas nozzle body 1.

[0076] As shown in Figure 7, the cylindrical body 31, each fin 32, and the cylindrical portion 24 form gas outflow passages τ between the inner circumferential surface 31b of the cylindrical body 31, the fin surface 32A of each fin 32, the fin back surface 32B of each fin 32, and the outer circumferential surface 24a of the cylindrical portion 24. Each gas outflow passage τ is formed between the fin surface 32A and the fin back surface 32B of each fin 32 in the direction F of the cylindrical centerline f of the cylindrical portion 24 and communicates with the gas inlet passage σ. Each gas outflow passage τ is arranged in the circumferential direction of the cylindrical portion 24 with a fin angle θA (angle) between each gas outflow passage τ. Each gas outflow passage τ has an inclination angle θB in the horizontal direction H, penetrates the cylindrical body 31, and communicates with the gas inlet chamber γ. As shown in Figure 7, each gas outflow channel τ corresponds to (opposes) each gas guide hole 52 and communicates with each gas guide hole 52. Each gas guide hole 52 is positioned between each fin 32 and corresponds to (opposes) each gas outflow channel τ and communicates with each gas outflow channel τ. Each gas guide hole 52 in each gas outflow channel τ (between each fin 32) is opposite the fin back surface 32B (inclined back surface) of each fin 32 and communicates with each gas outflow channel τ.

[0077] 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), the gas guide W (storage cylinder portion 54), and the fluid introduction body V (fluid introduction cylinder portion 41), as shown in Figures 1 to 7, and is fixed to the fluid introduction body V (fluid introduction cylinder portion 41). The nozzle cap 2 is fitted onto the gas nozzle Y (gas nozzle body 1) and the fluid introduction body V (fluid introduction cylinder portion 41), connecting the gas nozzle Y (gas nozzle body 1) and the fluid introduction body V (fluid introduction cylinder portion 41).

[0078] As shown in Figure 6, the cap body 15 is fitted onto the gas nozzle body 1, the storage cylinder 54, and the fluid introduction cylinder 41 from the surface 1A of the gas nozzle body 1, with one end surface 15A facing the fluid introduction cylinder 41. The cap body 15 is positioned so that the cap flange 16 abuts against the flange 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 introduction cylinder 41 by screwing (inserting) the male threaded portion 46 of the fluid introduction cylinder 41 into the female threaded portion 17 of the cap body 15, thereby connecting the gas nozzle body 1 and the fluid introduction cylinder 41.

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

[0080] As shown in Figures 23 and 24, the liquid P that flows into the liquid inlet hole 27 flows through the liquid inlet hole 27 toward the liquid flow hole 25 and is discharged into the liquid flow hole 25.

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

[0082] As shown in Figures 23 and 24, the liquid P (water) that flows into the mist injection hole 26 (inside the cylindrical tube section 23) flows through the mist injection hole 26 (inside the cylindrical tube section 23) toward the other end face 23B of the cylindrical tube section 23, and is ejected from the other end face 23B (mist injection hole 26) of the cylindrical tube section 23 as liquid mist M (droplets, water droplets) to the outside of the mist nozzle Z (mist nozzle body 21). The cylindrical tube section 23 (mist injection hole 26) ejects liquid mist M (droplets, water droplets) from the other end face 23B of the cylindrical tube section 23 toward the outside of the mist nozzle Z (fine mist generating nozzle X) in the direction E of the centerline e of the cylindrical tube section 23. The cylindrical tube section 23 ejects liquid P in a mist form from the mist injection hole 26.

[0083] In Figures 23 and 24, the fine mist generating nozzle X receives gas Q (compressed gas, compressed air) from the gas supply pipe 65 to the 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 channel σ and is introduced (inflows) into the gas introduction channel σ.

[0084] As shown in Figures 23 and 24, the gas Q introduced into the gas introduction channel σ flows through the gas introduction channel σ toward each gas guide hole 52 (guide tube portion 56) and flows into each gas guide hole 52. Gas Q (compressed gas, compressed air) flows into each gas guide hole 52.

[0085] As shown in Figures 23 and 24, the gas Q that flows into each gas guide hole 52 flows toward each gas outlet channel τ (between each fin 32) and is discharged into each gas outlet channel τ. Each gas guide hole 52 allows gas Q to flow into the gas outlet channel τ corresponding to (opposite) each gas guide hole 52.

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

[0087] As shown in Figure 25, the gas Q (air) flowing through each gas outflow channel τ flows out from each gas outflow channel τ along the outer circumferential surface 24a of the cylindrical portion 24 into the gas inlet chamber γ (gas inlet hole 4). Each gas outflow channel τ flows (ejects) gas Q into the gas inlet chamber γ along the outer circumferential surface 24a of the cylindrical portion 24. Each gas outflow channel τ is around the centerline of the cylindrical portion 24, and for example, the gas flows (ejects) into the gas inlet chamber γ in a clockwise direction.

[0088] As shown in Figures 24 and 25, the gas Q released into the gas inlet chamber γ flows in a swirling motion 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 and 13a of the second and third gas inlet holes 12 and 13), with the cylindrical centerline f of the cylindrical portion 24 as the centerline.

[0089] As shown in Figures 24 and 25, each gas outflow channel τ injects 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 circumferential surface 24a of the cylindrical section 24. Each gas outflow channel τ injects gas Q (air) into the gas inlet chamber γ, forming (generating) a swirling flow (vortex flow) in the gas inlet chamber γ around the centerline of the cylindrical section 24. The swirling flow of the gas is a swirling flow (vortex flow) around the centerline of the cylindrical section 24, and rotates (swirls) in a clockwise direction, for example.

[0090] As shown in Figures 24 and 25, the swirling flow-forming body U discharges (ejects) gas Q from each gas outlet channel τ into the gas inlet chamber γ, forming (generating) a swirling flow (vortex flow) around the centerline of the cylindrical section 24 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 that flows out into the gas inlet chamber γ) flows through the gas inlet chamber γ toward the gas throttling passage β, swirling around the centerline of the cylindrical portion 24 along the outer circumferential surface 24a of the cylindrical portion 24 and the inner circumferential surface 4a of the gas inlet hole 4 (the inner circumferential surfaces 12a and 13a of the second and third gas inlet holes 12 and 13), and flows out into the gas throttling passage β.

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

[0093] As shown in Figure 24, the gas throttling channel β causes the gas Q discharged from the gas inlet chamber γ (gas inlet channel) to flow along the inner conical surface 5a of the gas throttling hole 5 and the conical side surface 22C of the frustoconical portion 22, while swirling around the center line of the frustoconical portion 22, thereby causing the gas to flow into the gas injection channel α. The gas throttling channel β causes the gas Q discharged from the gas inlet chamber γ to flow from the gas inlet chamber γ towards the gas injection channel α, gradually increasing the flow velocity, thereby causing the gas Q to flow into the gas injection channel α.

[0094] As shown in Figure 24, the swirling gas Q (gas Q that flows into the gas injection channel α) flows along the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical tube section 23, swirling around the centerline of the cylindrical tube section 23, and flows through the gas injection channel α from the gas throttling channel β (gas throttling hole 5) towards the injection port 3A, and is injected to the outside of the gas nozzle Y (gas nozzle body 1) from the injection port 3A (the injection port 3A between the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical tube section 23).

[0095] As shown in Figure 24, the gas injection channel α causes the gas Q (swirling gas Q) that flows in from the gas throttling channel β to swirl around the centerline of the cylindrical tube section 23, flowing along the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical tube section 23 (on one end face 23A side), and injecting the gas Q from the injection port 3A (the injection port 3A between the inner circumferential surface 3a of the gas injection hole 3 and the outer circumferential surface 23a of the cylindrical tube section 23) to the outside of the gas nozzle Y (fine mist generating nozzle X).

[0096] As shown in Figure 24, the gas Q (swirling gas Q) injected from the nozzle 3A flows along the outer surface 23a of the cylindrical pipe section 23 (the other end face 23B side) that protrudes from the nozzle 3A, in the direction E of the pipe centerline e of the cylindrical pipe section 23, while swirling around the pipe centerline of the cylindrical pipe section 23, and flows from the nozzle 3A towards the other end face 23B of the cylindrical pipe section 23, forming a swirling airflow N (vortex airflow) near the other end face 23B of the cylindrical pipe section 23. The swirling airflow N (vortex airflow) flows in the direction E of the pipe centerline e of the cylindrical pipe section 23, swirling from the other end face 23A of the cylindrical pipe section 23, and is formed in a direction away from the other end face 23B (nozzle 3A) of the cylindrical pipe section 23. The swirling airflow N (vortex airflow) is formed surrounding the liquid mist (liquid droplets, water droplets) sprayed from the other end face 23B (mist injection hole 26) of the cylindrical pipe section 23.

[0097] As shown in Figure 24, the gas Q in the swirling airflow collides with the liquid mist (droplets, water droplets) sprayed from the cylindrical tube section 23 (mist injection holes 26), subdividing the liquid mist sprayed from the cylindrical tube section 23 and generating (forming) fine mist. The gas in the swirling airflow collides with the liquid mist (droplets, water droplets) sprayed from the cylindrical tube section 23 (mist injection holes 26), subdividing the gas mist and mixing and dissolving into the fine mist as fine bubbles and ultrafine bubbles, generating (forming) fine mist (fine droplets, fine water droplets) mixed and dissolved with fine bubbles and ultrafine bubbles.

[0098] The fine mist generating nozzle X can generate (form) a fine mist containing fine bubbles and ultrafine bubbles by causing a swirling airflow N (gas in a swirling airflow) to collide with the mist M ejected from the cylindrical tube section 23 (mist injection hole 26), thereby subdividing the liquid mist ejected from the cylindrical tube section 23. The fine mist generating nozzle X collides a swirling airflow N (gas in a swirling airflow) with the mist M ejected from the cylindrical tube section 23 (mist injection hole 26), thereby subdividing (dividing) the liquid mist ejected from the cylindrical tube section 23 into fine mist, and thereby increasing the volatility of the liquid mist ejected from the cylindrical tube section 23. [Industrial applicability]

[0099] This invention is ideal for generating 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 5 Gas throttling holes 21 Mist nozzle body 22. Truncated cone section 23 Cylindrical tube section 24 Cylindrical section α gas injection channel β gas throttling channel γ Gas inlet chamber (gas inlet channel)

Claims

[Claim 1] It comprises a gas nozzle having a gas nozzle body, a mist nozzle having a mist nozzle body, and a swirling flow forming body into which gas is introduced. The gas nozzle body is, A gas injection hole formed in a circular shape and having an injection port that opens to the surface of the gas nozzle body, A gas inlet hole is positioned concentrically with the aforementioned gas injection hole, and into which the gas flows, The device has a gas throttling hole that is concentric with the gas injection hole, positioned between the gas injection hole and the gas inlet hole, formed continuously with the gas injection hole and the gas inlet hole, and formed in the shape of a frustoconical shape that gradually decreases in diameter from the gas inlet hole toward the gas injection hole, The mist nozzle body is, The frustum of the cone and, A cylindrical tube section is positioned concentrically with the frustum section, and one end face of the tube is fixed to the frustum section by contacting the upper surface of the frustum section, and has a mist spray hole for spraying liquid mist, It has a cylindrical portion that is concentric with the frustoconical portion and fixed to the frustoconical portion by having one end surface abutting against the bottom surface of the frustoconical portion, and has a liquid inlet hole into which liquid flows, The aforementioned mist injection holes are An opening is made on the other end face of the cylindrical tube section, and it communicates with the liquid inlet hole. The cylindrical tube section is It is inserted into the gas injection hole, concentric with the gas injection hole, The other end of the cylindrical tube section is inserted into the gas injection hole, protruding from the injection port to the outside of the gas nozzle body. An annular gas injection channel is formed between the outer circumferential surface of the cylindrical tube section and the inner circumferential surface of the gas injection hole. The aforementioned frustoconical portion is, It is concentric with the gas throttling hole and inserted into the gas throttling hole, An annular gas throttling channel is formed between the conical side surface of the frustoconical portion and the conical inner surface of the gas throttling hole. The cylindrical portion is It is inserted into the gas inlet hole, concentric with the gas inlet hole, It is positioned with a gap between the outer circumferential surface of the cylindrical portion and the inner circumferential surface of the gas inlet hole, The swirling flow forming body is Displaced between the inner circumferential surface of the gas inlet hole and the outer circumferential surface of the cylindrical portion, an annular gas inlet chamber is formed in the gas inlet hole between the gas throttling hole and the gas inlet hole. The gas is discharged into the gas inlet chamber, forming a swirling flow around the centerline of the cylindrical portion in the gas inlet chamber. A fine mist generating nozzle characterized by the following features.

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