Cavitation generation device

Abstract

To provide a cavitation generation device capable of discharging a bubble liquid containing a large amount of microbubbles and a large amount of ultra-fine bubbles mixed and dissolved therein.SOLUTION: In a cavitation generation device according to the present invention, in a circulation hole, one end surface of a piece body is arranged substantially perpendicular to a hole center line of the circulation hole, a vortex flow is formed in liquid on a hole inner peripheral surface side of the circulation hole on one end surface side of the piece body, thereby generating a stable negative pressure state in liquid that is in contact with the one end surface of the piece body inside the vortex flow. By generating a stable negative pressure state in the liquid that is in contact with the one end surface of the piece body inside the vortex flow, stable cavitation is generated in the liquid W that flows from the one end surface inside the vortex flow toward an outflow port. As a result, a bubble liquid containing a large amount of microbubbles and a large amount of ultra-fine bubbles generated by cavitation and the vortex flow mixed and dissolved therein is produced and discharged from the outflow port.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a cavitation generating device that discharges a bubble liquid containing microbubbles and ultrafine bubbles. [Background technology]

[0002] Patent Document 1 discloses a shower nozzle as a technology for generating microbubbles. The shower nozzle has a flow diverter placed in the upstream first flow path. The flow diverter has many flow holes that generate a swirling flow in the first flow path, and the swirling flow causes water with microbubbles mixed in and dissolved in it to flow out. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3174668 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the swirling flow formed by the diverter top allows water with a certain amount of microbubbles mixed in or dissolved therein to flow out, but it is desired to further increase the amount of microbubbles and ultrafine bubbles mixed in or dissolved in the liquid, thereby allowing a large amount of microbubbles and ultrafine bubbles to flow out of the liquid.

[0005] The present invention provides a cavitation generating device that can mix and dissolve a large amount of microbubbles and ultrafine bubbles into a bubbly liquid and then discharge the mixed liquid. [Means for solving the problem]

[0006] A first aspect of the present invention provides a cylindrical body having an inlet, an outlet, and a circulation hole formed between the inlet and the outlet, wherein a liquid flows from the inlet into the circulation hole and the liquid that has flowed into the circulation hole flows out from the outlet, and a pillar-shaped piece body having a plurality of groove groups, wherein the piece body has one end face formed in a substantially flat shape that is substantially perpendicular to the center line of the piece body, the other end face, and an outer circumferential surface disposed between the end faces, and each of the groove groups extends from the outer circumferential surface to the piece body. a liquid guide groove having a groove depth on the center line side of the body and opening into the outer circumferential surface and the other end face, the liquid guide groove being formed between the end faces; and liquid injection grooves communicating with the liquid guide grooves, each liquid injection groove having a groove depth from one end face and opening into one end face and each liquid guide groove, opening into one end face at equal intervals in the circumferential direction of the piece body, and having a groove width from the outer circumferential surface toward the center line that is narrower than the interval between the outer circumferential surface and the center line, , and open on one of the end faces and the outer circumferential face, the piece body is disposed in the communication hole at an interval between the inlet and the outlet, one of the end faces faces the outlet, and one of the end faces is disposed concentrically with the communication hole, approximately perpendicular to the center line of the communication hole, and a plurality of liquid guide flow paths are formed together with the inner circumferential face of the communication hole and each of the liquid guide grooves, and a plurality of liquid injection paths are formed together with the inner circumferential face of the communication hole and each of the liquid injection grooves, and each of the liquid guide flow paths extends from the other end face to the front This is a cavitation generating device characterized in that the liquid that flows into each of the liquid guide flow paths is made to flow linearly toward one of the end faces in the direction of the center line of the bridge body, and the linear flow is changed to a flow that is inclined at an angle toward one of the end faces, and the liquid is sprayed into each of the liquid injection flow paths, and each of the liquid injection flow paths sprays the liquid sprayed from each of the liquid guide flow paths into the liquid in the circulation hole on one of the end faces of the bridge body, forming a vortex around the center line of the circulation hole on the inner surface of the hole.

[0007] A second aspect of the present invention provides a cylindrical body having an inlet, an outlet, and a circulation hole formed between the inlet and the outlet, wherein a liquid flows from the inlet into the circulation hole and the liquid that has flowed into the circulation hole flows out from the outlet, and a pillar-shaped piece body having a plurality of groove groups, wherein the piece body has one end face formed in a substantially flat shape that is substantially perpendicular to the center line of the piece body, the other end face, and an outer circumferential surface disposed between the end faces, and each groove group has a groove width from the outer circumferential surface toward the center line of the piece body, and opens to the outer circumferential surface and the other end face, a liquid guide groove formed between the end faces; and a liquid injection groove communicating with the liquid guide groove, wherein each of the liquid guide grooves has a surface width from the outer circumferential surface toward the center line, is disposed approximately perpendicular to one of the end faces, and is formed between a surface end position separating a surface interval from one of the end faces and the other end face; a second groove side surface having a surface width from the outer circumferential surface toward the center line, is disposed approximately perpendicular to one of the end faces, is disposed at a distance from the first groove side face, and is formed between the end faces; and and a groove inclined surface that is inclined while extending from the face end position to one of the end faces at an angle to the end face, and each of the liquid injection grooves has a groove bottom surface, has a groove depth from one of the end faces, and is opened to the second groove side surface between one of the end faces and the face end position, and is opened to one of the end faces at equal intervals in the circumferential direction of the piece body, and is opened to one of the end faces with a groove width narrower than the interval between the outer peripheral surface and the center line from the outer peripheral surface toward the center line, and the groove bottom surface is formed between the groove side surface in the width direction of the liquid injection groove and a cavitation generating device characterized in that a first groove side surface is disposed between the first groove side surface and the second groove side surface, and is inclined at an angle to one of the end faces, extending from the second groove side surface to one of the end faces; the piece body is disposed within the flow hole at a distance from the inlet and the outlet, with one of the end faces facing the outlet and one of the end faces being arranged concentrically with the flow hole and approximately perpendicular to the center line of the flow hole, so that the inner surface of the flow hole and each of the liquid guide grooves form multiple liquid guide paths, and the inner surface of the flow hole and each of the liquid injection grooves form multiple liquid injection paths. [Effects of the Invention]

[0008] In the present invention, one of the substantially planar end faces is positioned substantially perpendicular (orthogonal) to the center line of the communication hole, and a vortex is formed around the center line of the communication hole in the liquid on the one end face side of the link body and on the inner peripheral side of the communication hole, thereby generating a stable negative pressure (low pressure) in the liquid (liquid on the one end face side) inside the vortex (each liquid jet flow path) that contacts the one end face of the link body. According to the present invention, by generating a stable negative pressure (low pressure) in the liquid (liquid on the one end face side) inside the vortex (each liquid jet flow path) that contacts the one end face of the link body, stable cavitation can be generated in the liquid flowing from the one end face inside the vortex to the outlet, and a large amount (numerous) of microbubbles and a large amount (numerous) of mixed or dissolved bubble liquid (bubble water) can be generated by the cavitation and vortex, and can flow out from the outlet. The International Organization for Standardization (ISO) international standard "ISO20480-1" defines bubbles between 1 micrometer (μm) and 100 micrometers (μm) as "microbubbles," and bubbles smaller than 1 micrometer (μm) as "ultrabubbles" (same below). [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a cavitation generating device. [Figure 2] FIG. 2 is a front view showing the cavitation generating device. [Figure 3] FIG. 2 is a plan view showing a cavitation generating device. [Figure 4] FIG. 2 is a bottom view showing the cavitation generating device. [Figure 5] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 6] FIG. 6 is an enlarged view of the cross section BB of FIG. 5. [Figure 7] FIG. 6 is an enlarged view of part C in FIG. 5. [Figure 8] This is a partial cross-sectional front view showing the vortex guide (bridge body, bridge support ring) arranged in the flow hole. [Figure 9]This is a partial cross-sectional rear view showing the vortex guide (bridge body, bridge support ring) placed in the flow hole. [Figure 10] This is a perspective view of the vortex guide (bridge body and bridge support ring) placed in the flow hole. [Figure 11] FIG. 2 is a plan view showing vortex flows in a cavitation generating device. [Figure 12] FIG. 2 is an exploded view of the cavitation generating device. [Figure 13] This is a perspective view of the vortex guide (bridge body and bridge support ring) seen from above. [Figure 14] This is a perspective view of the vortex guide (bridge body and bridge support ring) seen from below. [Figure 15] FIG. 2 is a plan view showing the vortex guide (the bridge body and the bridge support ring). [Figure 16] FIG. 2 is a bottom view showing the vortex guide (the bridge body and the bridge support ring). [Figure 17] FIG. 2 is a front view showing the vortex guide (bridge body and bridge support ring). [Figure 18] FIG. 2 is a right side view showing the vortex guide (bridge body and bridge support ring). [Figure 19] FIG. 2 is a left side view showing the vortex guide (bridge body and bridge support ring). [Figure 20] FIG. 2 is a rear view showing the vortex guide (the bridge body and the bridge support ring). [Figure 21] FIG. 18 is an enlarged view of the cross section DD of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] A cavitation generating device according to the present invention will be described with reference to FIGS.

[0011] 1 to 21, a cavitation generator X (vortex generator) includes a cylindrical body 1 and a vortex guide 2.

[0012] 1 to 12, the cylindrical body 1 has an inlet tube main body 3, an outlet tube main body 4 (outlet tube portion), an inlet 5, an outlet 6, and a flow hole 7 (flow passage).

[0013] The inflow tube main body 3 is formed, for example, in a cylindrical shape (cylinder). As shown in Figures 1 to 5, 8 and 9, the inflow tube main body 3 has a connecting tube portion 8, an inflow tube portion 9, and a female thread portion 10. The connecting tube portion 8 is formed in a cylindrical shape (cylinder). The inflow tube portion 9 is formed in a cylindrical shape (cylinder).

[0014] 1 to 5, 8 and 9, the connecting tubular portion 8 is fitted onto one tubular end 9A of the inlet tubular portion 9 (inlet tubular main body 3) in the direction A of the tubular center line a of the inlet tubular portion 9, and is fixed to the inlet tubular portion 9 (the outer peripheral surface of the inlet tubular portion 9). The connecting tubular portion 8 is disposed so as to protrude from one tubular end 9A of the inlet tubular portion 9 in the direction A of the tubular center line a of the inlet tubular portion 9. The female thread portion 10 is formed on the inner peripheral surface of the connecting tubular portion 8.

[0015] The outflow tube main body 4 is formed, for example, in a cylindrical shape (cylinder). As shown in Figures 1 to 5, 8 and 9, the outflow tube main body 4 has a male thread portion 11. The male thread portion 11 is arranged at one tube end 4A of the outflow tube main body 4 in the direction A of the tube center line a of the outflow tube main body 4. The male thread portion 11 is formed on the outer circumferential surface of the outflow tube main body 4.

[0016] 4 and 5, the inlet 5 is formed in the inlet tube main body 3 (inlet tube portion 9). The inlet 5 opens at the other tube end 9B of the inlet tube portion 9 (inlet tube main body 4) in the direction A of the tube center line a of the inlet tube main body 3, and is connected to the inside of the inlet tube portion 9 (inside the inlet tube main body 4 / inside the tube body 1).

[0017] 1, 3, and 5, the outlet 6 is formed in the outflow tube main body 4. The outlet 6 opens at the other tube end 4B of the outflow tube main body 4 in the direction A of the tube center line a of the outflow tube main body 4, and is connected to the inside of the outflow tube main body 4 (inside the cylindrical body 1).

[0018] As shown in FIGS. 1, 2, 5 and 7, the cylindrical body 1 is configured by connecting an inlet cylindrical body 3 and an outlet cylindrical body 4.

[0019] In the cylindrical body 1, the outflow tube main body 4 is arranged concentrically with the inflow tube main body 3, as shown in Figures 5 and 7. The outflow tube main body 4 is connected to the inflow tube main body 3 (connecting tube portion 8, inflow tube portion 9) by screwing (screwing in) the male thread portion 11 into the female thread portion 10 of the outflow tube main body 3 (connecting tube portion 8).

[0020] As shown in Figures 3, 5, and 7, when the inlet tube main body 3 and the outlet tube main body 4 are connected to each other, the cylindrical body 1 forms a flow hole 7 inside the cylindrical body 1 (the inlet tube main body 3 and the outlet tube main body 4). The flow hole 7 (flow passage) is formed in a circular shape (circular hole). The flow hole 7 is formed between the inlet 5 and the outlet 6 in the direction A of the cylindrical center line a of the cylindrical body 1 (the inlet tube main body 3 and the outlet tube main body 4).

[0021] As shown in Figures 3 to 5, the communication hole 7 is formed concentrically with the cylindrical body 1. The communication hole 7 is connected to the inlet 5 and the outlet 6. The other cylindrical end 9B (cylindrical end surface) of the inlet cylindrical portion 9 (inlet cylindrical main body 3) becomes one cylindrical end (cylindrical end surface) of the cylindrical body 1. The other cylindrical end (cylindrical end surface) of the outlet cylindrical main body 4 becomes the other cylindrical end (cylindrical end surface) of the cylindrical body 1. The inlet 5 opens at one cylindrical end of the cylindrical body 1 and is connected to the communication hole 7. The outlet 6 opens at the other cylindrical end of the cylindrical body 1 and is connected to the communication hole 7.

[0022] As shown in Fig. 5, in the cylindrical body 1, liquid W (water) flows into the communication holes 7 from the inlet 5. In the cylindrical body 1, the liquid W that has flowed into the communication holes 7 from the inlet 5 flows out from the outlet 6. The liquid W flows into the communication holes 7 from the inlet 5, flows through the communication holes 7 towards the outlet 6, and flows out from the outlet 6.

[0023] The vortex guide 2 (cavitation generator X) has a bridge body 15 (bridge) and a bridge support ring 16, as shown in FIGS.

[0024] As shown in FIGS. 13 to 21, the piece 15 has a plurality of (for example, four) groove groups 18 to 21 and a plurality of (for example, four) slots 22.

[0025] The bridge body 15 is formed in a columnar (three-dimensional) shape. The bridge body 15 is formed, for example, in a cylindrical shape. As shown in Figures 13 to 21, the bridge body 15 has one end face 15A (pillar end face) formed in a substantially planar shape that is substantially perpendicular to the center line b (pillar center line) of the bridge body 15, the other end face 15B (pillar end face), and an outer peripheral surface 15C disposed (formed) between the end faces 15A and 15B. One end face 15A is formed in a substantially planar shape that is substantially perpendicular to the center line b of the bridge body 15.

[0026] 13 to 21, the groove groups 18 to 21 are formed on the link body 15 with intervals (equal intervals / equal angles) between each other in the circumferential direction of the link body 15. Each of the groove groups 18 to 21 has a liquid guide groove 25 (first groove) and a liquid injection groove 26 (second groove) that communicates with the liquid guide groove 25.

[0027] As shown in Figures 13 to 21, the liquid guide grooves 25 of each groove group 18 to 21 are formed in the piece 15 in the circumferential direction of the piece 15 with intervals (equal intervals / equal angles) between the liquid guide grooves 25 of each groove group 18 to 21.

[0028] 13 to 21, the liquid guide grooves 25 of each groove group 18-21 (each liquid guide groove 25) opens to the other end face 15B (pillar end face) of the piece 15 in the direction B of the center line b of the piece 15, and is disposed (formed) between the end faces 15A, 15B. The liquid guide grooves 25 of each groove group 18-21 (each liquid guide groove 25) is formed to extend from one end face 15A to the other end face 15B in the direction B of the center line b of the piece 15.

[0029] As shown in Figure 15, the liquid guide grooves 25 of each groove group 18-21 (each liquid guide groove 25) have a groove depth GH from the outer peripheral surface 15C of the piece body 15 toward the center line b, and are open to the outer peripheral surface 15C and the other end face 15B of the piece body 15. The liquid guide grooves 25 of each groove group 18-21 (each liquid guide groove 25) are formed in the radial direction of the piece body 15, with a groove depth GH from the outer peripheral surface 15C of the piece body 15 toward the center line b. The liquid guide grooves 25 of each groove group 18-21 (each liquid guide groove 25) have a groove depth GH between the outer peripheral surface 15C of the piece body 15 and the center line b of the piece body 15, and are open to the outer peripheral surface 15C and the other end face 15B of the piece body 15.

[0030] As shown in Figures 13 to 21, the liquid guide grooves 25 of each groove group 18 to 21 have a first groove side surface 31, a second groove side surface 32, and a groove inclined surface 33 (first groove bottom surface), and are formed (configured) by, for example, the first groove side surface 31, the second groove side surface 32, and the groove inclined surface 33.

[0031] As shown in Figures 13 to 21, the first groove side surface 31 is disposed from the outer peripheral surface 15C of the link bridge 15 toward the center line b with a face width MH. The first groove side surface 31 is disposed between the outer peripheral surface 15C of the link bridge 15 and the center line b of the link bridge 15 with a face width MH. The first groove side surface 31 is formed in the radial direction of the link bridge 15, from the outer peripheral surface 15C of the link bridge 15 toward the center line b of the link bridge 15, with a face width MH. One face width end 31A of the first groove side surface 31 is located on the outer peripheral surface 15C of the link bridge 15. The other face width end 31B of the first groove side surface 31 is located on the center line b side of the link bridge 15.

[0032] The first groove side surface 31 is disposed substantially perpendicular (orthogonal) to one end surface 15A of the piece 15, as shown in FIGS.

[0033] 17 to 20, the first groove side surface 31 is disposed between the end faces 15A and 15B of the link bridge 15 in the direction B of the center line b of the link bridge 15. The first groove side surface 31 extends from the other end face 15B of the link bridge 15 to one end face 15B of the link bridge 15 in the direction B of the center line b of the link bridge 15, with a surface length ML.

[0034] As shown in Figures 16 and 16 to 20, the first groove side surface 31 is formed between a surface end position β, which is spaced a distance α2 (surface spacing / second surface spacing) from the other surface end 15B of the link block 15 and a distance α1 (surface spacing / first surface spacing) from one end face 15A of the link block 15, and the other end face 15B of the link block 15 in the direction B of the center line b of the link block 15. The distance α2 is, for example, greater than the distance α1. One surface length end 31C of the first groove side surface 31 is located at the surface end position β. The other surface length end 31D of the first groove side surface 31 is located at the other end face 15B of the link block 15.

[0035] As shown in Figures 14 and 16 to 21, the second groove side surface 32 is disposed with a face width NH from the outer peripheral surface 15C of the link bridge 15 toward the center line b. The second groove side surface 32 is disposed with a face width NH between the outer peripheral surface 15C of the link bridge 15 and the center line b of the link bridge 15. The second groove side surface 32 is formed with a face width NH in the radial direction of the link bridge 15, from the outer peripheral surface 15C of the link bridge 15 toward the center line b of the link bridge 15. One face width end 32A of the second groove side surface 32 is located on the outer peripheral surface 15C of the link bridge 15. The other face width end 32B of the second groove side surface 32 is located on the center line b side of the link bridge 15.

[0036] The second groove side surface 32 is disposed substantially perpendicular (orthogonal) to one end surface 15A of the piece 15, as shown in FIGS.

[0037] As shown in Figures 14 and 16 to 20, the second groove side surface 32 is disposed between the end faces 15A, 15B of the link bridge 15 in the direction B of the center line b of the link bridge 15. The second groove side surface 32 has a face length NL and extends from the other end face 15B of the link bridge 15 to one face end 15B of the link bridge 15 in the direction B of the center line b of the link bridge 15. One face length end 32C of the second groove side surface 32 is located on one end face 15A of the link bridge 15. The other face length end 32D of the second groove side surface 32 is located on the other end face 15B of the link bridge 15.

[0038] 13, 14, and 16 to 21, the second groove side surface 32 is disposed at an interval (angle) from the first groove side surface 31. The second groove side surface 32 is formed continuously with the first groove side surface 31 in the circumferential direction of the bridge body 15, at an angle (interval) from the first groove side surface 31 and the second groove side surface 32. The angle (interval) is, for example, an angle of 90 degrees.

[0039] 13, 14, and 16 to 21, the second groove side surface 32 is formed (disposed) continuously with the first groove side surface 31. The second groove side surface 32 is continuous with the first groove side surface 31, with the other width surface end 32B of the second groove side surface 32 abutting (continuing) with the other width surface end 31B of the first groove side surface 31. The first groove side surface 31 and the second groove side surface 32 are formed continuously in the circumferential direction of the bridge body 15, with an angle (interval) between the first groove side surface 31 and the second groove side surface 32.

[0040] 13, 14, and 16 to 21, the groove inclined surface 33 is disposed between the first groove side surface 31 and the second groove side surface 32. The groove inclined surface 33 is disposed across the face width ends 31A and 31B of the first groove side surface 31 and the face width ends 32A and 32B of the second groove side surface 32, and is formed continuously with the first groove side surface 31 and the second groove side surface 32.

[0041] As shown in FIG. 13 and FIGS. 17 to 20, the groove inclined surface 33 is disposed on one end surface 15A side of the piece 15 in the direction B of the center line b of the piece 15.

[0042] 13, 14, and 16 to 20, the groove inclined surface 33 is inclined while extending from the surface end position β (one surface length end 31C of the first groove side surface 31) to one end surface 15A of the bridge body 15, forming an angle θ1 (first angle / first acute angle). The angle θ1 (acute angle) is an angle exceeding 0 degrees and less than 90 degrees, for example, 45 degrees (θ1 = 45 degrees).

[0043] 13, 15, and 17 to 20, the liquid ejection grooves 26 of each groove group 18 to 21 (liquid ejection holes 26) are arranged at equal intervals (equal angles) in the circumferential direction of the link body 15, and are opened to one end surface 15A of the link body 15. The equal intervals (equal angles) between the liquid ejection grooves 26 of each groove group 18 to 21 are, for example, 90 degrees.

[0044] The liquid ejection grooves 26 (each liquid ejection groove 26) of each groove group 18-21 have an ejection port P (opening) that opens to one end face 15A of the piece 15. The ejection ports P of each liquid ejection groove 26 are opened to one end face 15A with equal intervals (equal angles of 90 degrees) between each ejection port P in the circumferential direction of the piece 15.

[0045] The liquid ejection grooves 26 of each of the groove groups 18 to 21 are arranged between the liquid guide grooves 25 of each of the groove groups 18 to 21, as shown in FIGS.

[0046] 13 to 20, the liquid ejection grooves 26 of each groove group 18 to 21 are connected to the liquid guide grooves 25 of the same groove group 18 to 21 (the same groove group). The liquid ejection grooves 26 of each groove group 18 to 21 are connected to the liquid guide grooves 25 of each groove group 18 to 21, respectively.

[0047] The liquid injection grooves 26 of groove group 18 (first groove group) are connected to the liquid guide grooves 25 of groove group 18. The liquid injection grooves 26 of groove group 19 (second groove group) are connected to the liquid guide grooves 25 of groove group 19. The liquid injection grooves 26 of groove group 20 (third groove group) are connected to the liquid guide grooves 25 of groove group 20. The liquid injection grooves 26 of groove group 21 (fourth groove group) are connected to the liquid guide grooves 25 of groove group 21.

[0048] As shown in Figure 15, the liquid injection grooves 26 of each groove group 18-21 (each liquid injection groove 26) are opened on one end face 15A of the link body 15 and on the outer peripheral surface 15C of the link body 15 from the outer peripheral surface 15C of the link body 15 toward the center line b of the link body 15 (between the outer peripheral surface 15C of the link body 15 and the center line b of the link body 15), with a groove width gh that is narrower than the distance between the outer peripheral surface 15C of the link body 15 and the center line b of the link body 15 (the radius r of the link body 17). The liquid injection grooves 26 of each groove group 18-21 are formed in the radial direction of the link body 15, from the outer peripheral surface 15C of the link body 15 toward the center line b of the link body 15, with the groove width gh. The groove width gh is, for example, less than half (one-half) of the distance between the outer peripheral surface 15C of the link body 15 and the center line b of the link body 15 (the radius r of the link body 17).

[0049] As shown in Figure 15, the liquid injection grooves 26 of each groove group 18-21 (each liquid injection groove 26) have a groove length gl from the second groove side surface 32 of the liquid guide groove 25 of each groove group 18-21 in a direction perpendicular to the width direction of the liquid injection groove 26 (tangential direction of the outer peripheral surface 15C of the link body 15), and open to one end face 15A of the link body 15 and the outer peripheral surface 15C of the link body 15. The groove length gl is, for example, formed to be longer than the groove width gh. Each groove group 18-21 has a groove width gh between the outer peripheral surface 15C of the link body 15 and the center line b, and is formed in a quadrangle (rectangle) having a groove length gl in a direction perpendicular to the width direction of the liquid injection groove 26, and opens to one end face 15A of the link body 15.

[0050] 15, in the liquid ejection grooves 26 of each groove group 18-21, the ejection port P has an opening width gh (opening width narrower than the face width NH of the second groove side surface 32) that is the same as the groove width gh between the outer peripheral surface 15C of the piece body 15 and the center line b, and opens to one end face 15A of the piece body 15 with an opening length gl that is the same as the groove length gl from the second groove side surface 32 of the liquid guide grooves 25 of each groove group 18-21 in a direction perpendicular to the opening width direction of the ejection port P. In the liquid ejection grooves 26 of each groove group 18-21, the ejection port P is arranged so that one opening length end p1 is positioned on the second groove side surface 32 of the liquid guide groove 25 of each groove group 18-21.

[0051] As shown in Figures 17 to 20, the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18 to 21 have a groove depth gd (opening length) from one end face 15A of the piece body 15 (one opening length end p1 of the injection port P) in the direction B of the center line b of the piece body 15, and open to one end face 15 of the piece body 15 and the second groove side surface 32 of the liquid guide grooves 25 of each groove group 18 to 21 (each liquid guide groove 25).

[0052] The liquid ejection grooves 26 (each liquid ejection groove 26) of each groove group 18-21 open to a second guide side surface 32 (each liquid guide groove 25) between one end face 15A of the piece 15 and the surface end position β (one surface length end 31C of the first groove side surface 31) in the direction B of the center line b of the piece 15. The liquid ejection grooves 26 of each groove group 18-21 open to the second groove side surface 32 (each liquid guide groove 25) of the liquid guide grooves 25 of each groove group 18-21 between one end face 15A of the piece 15 and the surface end position β.

[0053] As shown in Figures 17 to 20, the liquid injection grooves 26 of each groove group 18 to 21 are opened to a second groove side surface 32 between one end face 15A and the face end face β at a face end position β at a groove interval γ in the direction B of the center line b of the piece body 15.

[0054] The liquid injection grooves 26 of each groove group 18-21 (each liquid injection groove 26) are open to the second groove side surface 32 of the liquid guide grooves 25 of the same groove group 18-21 (same groove group). The liquid injection grooves 26 of groove group 18 are open to the second groove side surface 32 of the liquid guide grooves 25 of groove group 18. The liquid injection grooves 26 of groove group 19 are open to the second groove side surface 32 of the liquid guide grooves 25 of groove group 19. The liquid injection grooves 26 of groove group 20 are open to the second groove side surface 32 of the liquid guide grooves 25 of groove group 20. The liquid injection grooves 26 of groove group 21 are open to the second groove side surface 32 of the liquid guide grooves 25 of groove group 21.

[0055] 13 to 15, the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18 to 21 have a groove width gh (opening width) narrower than the surface width NH of the second groove side surface 32 from the outer peripheral surface 17C of the bridge body 17 toward the center line b between the outer peripheral surface 17C of the bridge body 17 and the center line b (radial direction of the bridge body 17), and open to the second groove side surface 32 of the liquid guide grooves 25 of each groove group 18 to 21. The liquid injection grooves 26 of each groove group 18 to 21 open to the second groove side surface 32 and are connected to the liquid guide grooves 25 of each groove group 18 to 21 (between the first groove side surface 31 and the second groove side surface 32).

[0056] As shown in Figures 13 to 15 and 17 to 20, the liquid injection grooves 26 of each groove group 18 to 21 have groove side surfaces 35 and groove bottom surfaces 36 (second groove bottom surfaces), and are formed, for example, by the groove side surfaces 35 and groove bottom surfaces 36. The groove side surfaces 35 are arranged with a groove width gh from the outer peripheral surface 15C of the link body 15 toward the center line b of the link body 15. The groove bottom surfaces 36 are arranged between the outer peripheral surface 15C of the link body 15 and the groove side surfaces 35. The groove bottom surfaces 36 are arranged between the second groove side surfaces 32 of the liquid guide grooves 25 of each groove group 18 to 21 and one end surface 15A of the link body 15 (each opening length end p1, p2 of the injection port P).

[0057] 17 to 20, the groove bottom surface 36 is inclined at an angle θ2 (second angle / second acute angle) to one end surface 15A of the link body 15, extending from the second groove side surface 32 (the second groove side surface 32 where the liquid injection grooves 26 open) of the liquid guide grooves 25 of each groove group 18 to 21 to one end surface 15A of the link body 15. The angle θ2 (acute angle) is an angle exceeding 0 degrees and less than 90 degrees, for example, 50 degrees (θ2 = 50 degrees).

[0058] As shown in Figures 17 to 20, the groove bottom surface 36 forms a second acute angle θ2 (acute angle) with one end face 15A of the piece body 15, and is inclined while extending from the second groove side surface 32 (one opening length end p1 of the injection nozzle P) of the liquid guide groove 25 of each groove group 18 to 21 to one end face 15A of the piece body 15, and extends to the other opening length end p2 of the injection nozzle P.

[0059] 13 to 20, the bridge support ring 16 is formed in an annular (ring-shaped) shape having a ring thickness T. The bridge support ring 16 has ring surfaces 16A and 16B in the ring thickness direction.

[0060] 13 to 20, the bridge support ring 16 is arranged concentrically with the bridge body 15. The bridge support ring 16 is arranged with the ring back surface 16B facing the other end surface 15B of the bridge body 15. The bridge support ring 16 is fitted onto the bridge body 15, and the inner peripheral surface 16C of the bridge support ring 16 is fixed to the outer peripheral surface 15C of the bridge body 15, and is arranged on the other end surface 15B side of the bridge body 17. The bridge support ring 16 is fixed to the bridge body 15 with the ring back surface 16B arranged flush with the other end surface 15B of the bridge body 15.

[0061] As shown in Figures 13, 14, and 16 to 20, each slot 22 is formed in the piece 15. In the direction B of the center line b of the piece 15, each slot 22 is located at a distance from the surface end position β (one longitudinal end 31C of the first groove side surface 31) on the other end face 15B side of the piece 15. Each slot 22 penetrates the piece 15 between the liquid guide grooves 25 of each groove group 18 to 21 in the circumferential direction of the piece 15 and opens to each adjacent liquid guide groove 25. Each slot 22 opens to the other end face 15B of the piece 15. The liquid guide grooves 25 of each groove group 18 to 21 are connected through each slot 22 on the other end face 15B side of the piece 15.

[0062] As shown in Figure 5, the vortex flow guide 2 is disposed in the flow hole 7 at a distance σ from the inlet 5 and at a distance λ from the outlet 6. The vortex flow guide 2 is disposed in the flow hole 7 so that one end face 15A of the link member 15 is substantially perpendicular (orthogonal) to the center line a of the flow hole 7 (the center line a of the cylinder 1). The vortex flow guide 2 is disposed in the flow hole 7 so that the link member 15 is concentric with the flow hole 17 (the cylinder 1). The vortex flow guide 2 is disposed in the flow hole 7 so that one end face 15A (each injection port P) of the link member 15 faces the outlet 6 and the other end face 15B (the back surface 16B of the link member support ring 16) faces the inlet 5, as shown in Figures 3 to 5 and 7.

[0063] As shown in Figures 5 and 7, vortex guide 2 is fixed to cylindrical body 1 by disposing bridge support ring 16 between one end 9A of inlet cylindrical section 9 (inlet cylindrical body 3) and one end 4A of outlet cylindrical body 4. Vortex guide 2 is fixed to cylindrical body 1 by abutting back surface 16B of bridge support ring 16 against one end 9A of inlet cylindrical section 9 and abutting back surface 16A of bridge support ring 16 against one end 4A of outlet cylindrical body 4. As shown in Figure 7, the outlet cylindrical section 9 and the outlet cylindrical body 4 sandwich bridge support ring 16 between one end 9A of inlet cylindrical section 9 and one end 4A of outlet cylindrical body 4, thereby fixing vortex guide 2 (bridge body 15, bridge support ring 16) to cylindrical body 1.

[0064] The piece 15 is disposed in the flow hole 7 (in the flow passage) as shown in Figures 3 to 9. The piece 15 is disposed in the flow hole 7 with the inlet 5 and the outlet 6 spaced apart by intervals σ and λ as shown in Figure 5. The piece 15 is disposed in the flow hole 7 (flow passage) with the interval λ between one end face 15A and the outlet 6, and the interval α between the other end face 15B and the inlet 5. The piece 15 is fixed to the cylindrical body 1.

[0065] As shown in Fig. 5, the piece 15 is arranged concentrically with the flow hole 7, with one end face 15A (each injection port P) facing the outlet 6 and the other end face 15B facing the inlet 5. As shown in Figs. 3 to 9, the piece 15 is arranged concentrically with the flow hole 7, with one end face 15A, which is substantially planar (flat), being substantially perpendicular (orthogonal) to the center line a of the flow hole 7 (cylinder center line a of the cylindrical body 1). One end face 15A is arranged within the flow hole 7, being substantially perpendicular (orthogonal) to the center line a of the flow hole 7 (cylinder center line a of the cylindrical body 1).

[0066] As shown in Figures 3, 5 and 6 to 11, the piece 15 is arranged in the through hole 7 with a small gap (gap) between the outer surface 15C of the piece 15 and the inner surface 7a of the through hole 7 (the inner surface of the cylindrical body 1), or the piece 15 is arranged in the through hole 7 with the outer surface 15C of the piece 15 abutting against the inner surface 7a of the through hole 7 (the inner surface of the cylindrical body 1).

[0067] As shown in Figures 4, 6, and 8 to 11, the piece 15 is positioned within the circulation hole 7, forming liquid guide flow paths ε [multiple (four) liquid guide flow paths ε] with the inner surface 7a of the circulation hole 7 and the liquid guide grooves 25 (each liquid guide groove 25) of each groove group 18 to 21.

[0068] As shown in Figures 4, 6, and 8 to 11, the circulation hole 7 and the piece 15 form a liquid guide flow path ε [multiple (four) liquid guide flow paths ε] together with the inner surface 7a of the circulation hole 7 and the liquid guide grooves 25 of each groove group 18 to 21.

[0069] The inner circumferential surface 7a of the communication hole 7 and the piece 15 form a liquid guide flow path ε (first liquid guide flow path) together with the liquid guide grooves 25 of the groove group 18, and the inner circumferential surface 7a of the communication hole 7 and the liquid guide grooves 25 of the groove group 19 form a liquid guide flow path ε (second liquid guide flow path). The inner circumferential surface 7a of the communication hole 7 and the piece 15 form a liquid guide flow path ε (third liquid guide flow path) together with the liquid guide grooves 25 of the groove group 20, and the inner circumferential surface 7a of the communication hole 7 and the liquid guide grooves 25 of the groove group 21 form a liquid guide flow path ε (fourth liquid guide flow path). Each liquid guide flow path ε is formed (configured) by the inner circumferential surface 7a of the communication hole 7 and the liquid guide grooves 25 of each groove group 18-21. Each liquid guide flow path ε is connected to the communication hole 7 on the inlet 5 side (the communication hole 7 between one end face 15A and the outlet 6).

[0070] As shown in Figures 4, 6, 8 and 9, the piece body 15 is arranged within the circulation hole 7, forming liquid guide flow paths ε [multiple (four) liquid guide flow paths ε] between the inner surface 7a of the circulation hole 7, the first groove side surface 31 of the liquid guide grooves 25 (each liquid guide groove 25) of each groove group 18 to 21, the second groove side surface 32 of each liquid guide groove 25, and the groove inclined surface 33 of each liquid guide groove 25.

[0071] As shown in Figures 4, 6, 8 and 9, the circulation hole 7 and the piece 15 form liquid guide flow paths ε [multiple (four) liquid guide flow paths ε] among the inner peripheral surface 7a of the circulation hole 7, the first groove side surfaces 31 of the liquid guide grooves 25 (each liquid guide groove 25) of each groove group 18 to 21, the second groove side surfaces 32 of the liquid guide grooves 25 (each liquid guide groove 25) of each groove group 18 to 21, and the second groove side surfaces 32 of the liquid guide grooves 25 (each liquid guide groove 25) of each groove group 18 to 21. Each liquid guide flow path ε is formed between the inner peripheral surface 7a of the flow hole 7, the first groove side surface 31 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18 to 21, the second groove side surface 32 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18 to 21, and the second groove side surface 32 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18 to 21.

[0072] As shown in Figures 3 and 7 to 11, the piece 15 is arranged within the communication hole 7, with the inner surface 7a of the communication hole 7 and the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18 to 21 forming liquid injection flow paths δ [multiple (four) liquid injection flow paths δ].

[0073] As shown in Figures 3 and 7 to 11, the inner surface 7a of the communication hole 7 and the link body 15 form liquid injection flow paths δ (multiple (four) liquid injection flow paths δ) together with the liquid injection grooves 26 of each groove group 18 to 21.

[0074] The communication hole 7 and the piece 15 form a liquid injection flow path δ (first liquid injection flow path) together with the inner peripheral surface 7a of the communication hole 7 and the liquid injection groove 26 of the groove group 18, and form a liquid injection flow path δ (second liquid injection flow path) together with the inner peripheral surface 7a of the communication hole 7 and the liquid injection groove 26 of the groove group 19. The communication hole 7 and the piece 15 form a liquid injection flow path δ (third liquid injection flow path) together with the inner peripheral surface 7a of the communication hole 7 and the liquid injection groove 26 of the groove group 20, and form a liquid injection flow path δ (fourth liquid injection flow path) together with the inner peripheral surface 7a of the communication hole 7 and the liquid injection groove 26 of the groove group 21.

[0075] Each liquid injection flow path δ is formed (configured) by the inner peripheral surface 7a of the communication hole 7 and the liquid injection grooves 26 of each groove group 18 to 21. Each liquid injection path δ opens at one end face 15A of the piece 15, and communicates with each injection port P and the communication hole 7 on the outflow port 6 side.

[0076] As shown in Figures 7 to 10, the piece body 15 is arranged within the communication hole 7, forming liquid injection flow paths δ (multiple (four) liquid injection flow paths δ) between the inner surface 7a of the communication hole 7, the groove side surfaces 35 of the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18 to 21, and the groove bottom surfaces 36 of each liquid injection groove 26.

[0077] As shown in Figures 7 to 9, the circulation hole 7 and the piece 15 form liquid injection flow paths δ (multiple (four) liquid injection flow paths δ) between the inner peripheral surface 7a of the circulation hole 7, the groove side surfaces 35 of the liquid injection grooves 26 (each liquid guide groove 26) of each groove group 18 to 21, and the groove bottom surfaces 36 of the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18 to 21.

[0078] Each liquid guide flow path ε is formed between the inner peripheral surface 7a of the flow hole 7, the groove side surface 36 of the liquid injection groove 26 (each liquid injection groove 26) of each groove group 18-21, and the groove bottom surface 36 of the liquid injection groove 26 (each liquid injection groove 26) of each groove group 18-21.

[0079] 7 to 10, each liquid jet flow path δ is connected to each liquid guide flow path ε. The liquid jet flow path δ formed by the hole inner peripheral surface 7a of the communication hole 7 and the liquid jet grooves 26 of each groove group 18-21 is connected to the liquid guide path δ formed by the liquid jet grooves 26 of each groove group 18-21, the liquid guide grooves 25 of the same groove group 18-21 (same groove group), and the hole inner peripheral surface 7a of the communication hole 7.

[0080] The liquid injection flow path δ formed by the inner peripheral surface 7a of the communication hole 7 and the liquid injection groove 26 of the groove group 18 is connected to the liquid guide flow path ε formed by the inner peripheral surface 7a of the communication hole 7 and the liquid guide groove 25 of the groove group 18, as shown in Figures 7 to 9.

[0081] The liquid jet flow path δ formed by the inner circumferential surface 7a of the communication hole 7 and the liquid jet groove 26 of the groove group 19 is connected to the liquid guide flow path ε formed by the inner circumferential surface 7a of the communication hole 7 and the liquid guide groove 25 of the groove group 19. The liquid jet flow path δ formed by the inner circumferential surface 7a of the communication hole 7 and the liquid jet groove 26 of the groove group 20 is connected to the liquid guide flow path ε formed by the inner circumferential surface 7a of the communication hole 7 and the liquid guide groove 25 of the groove group 20. The liquid jet flow path δ formed by the inner circumferential surface 7a of the communication hole 7 and the liquid jet groove 26 of the groove group 21 is connected to the liquid guide flow path ε formed by the inner circumferential surface 7a of the communication hole 7 and the liquid guide groove 25 of the groove group 21.

[0082] As shown in Fig. 5, the cavitation generator X is connected to a liquid supply source 71 (water supply source), and liquid W (water) is supplied from the liquid supply source 71. The liquid supply source 71 is connected to the inlet 5 of the cylindrical body 1, and causes liquid W (pressurized liquid / pressurized water) to flow into the circulation holes 7. As shown in Fig. 5, in the cylindrical body 1, liquid W flows from the inlet 5 into the circulation holes 7, and the liquid W flowing through the circulation holes 7 is discharged from the outlet 6. In the cavitation generator X, liquid W flows from the inlet 5 into the circulation holes 7, filling the circulation holes 7 with liquid W.

[0083] Liquid W supplied from liquid supply source 71 flows from inlet 5 into inlet-5-side circulation hole 7 [circulation hole 7 between inlet 5 and vortex flow guide 2 (piece body 15)] as shown in Fig. 5. Liquid W that has flowed into inlet-5-side circulation hole 7 flows through circulation hole 7 toward vortex flow guide 2 (piece body 15) and flows from the other end face 15B of piece body 15 into each liquid guide flow path ε (between each liquid guide groove 25 of groove groups 18-21 and the inner circumferential surface 7a of circulation hole 7), as shown in Figs. 5 and 7 to 10.

[0084] A portion of the liquid W that has flowed into each liquid guide channel ε from one end face 15B of the piece 15 passes through each slot 22 and flows out into each adjacent liquid guide channel ε, as shown in FIGS.

[0085] As shown in Figures 6, 8 to 10, the liquid W flowing into each liquid guide channel ε flows linearly from the other end face 15B of the piece 15 toward the groove inclined surfaces 33 of the liquid guide grooves 25 of each groove group 18-21, along the first groove side surface 31 and the second groove side surface 32, in the direction B of the center line b of the piece 15 (the direction A of the cylindrical center line a of the cylindrical body 1). As shown in Figures 6, 8 to 10, the liquid W flowing into each liquid guide channel ε flows from the other end face 15B of the piece 15 toward the groove inclined surfaces 33 of the liquid guide grooves 25 of each groove group 18-21, along the first groove side surface 31 and the second groove side surface 32, in a direction parallel to the first groove side surface 31 and the second groove side surface 32 (the center line b of the piece 15).

[0086] 8 to 10, the liquid W flowing through each liquid guide flow path ε comes into contact with (collides with) the inclined groove surfaces 33 of the liquid guide grooves 25 of each groove group 18 to 21, and flows toward each liquid jet flow path δ along the inclined groove surfaces 33 of the liquid guide grooves 25 of each groove group 18 to 21. The inclined groove surfaces 33 of the liquid guide grooves 25 of each groove group 18 to 21 change the liquid W flowing through each liquid guide flow path ε from a linear flow in the direction B of the center line b of the piece 15 to a flow that is inclined at an angle θ1 to one end face 15A of the piece 15, and flows toward each liquid jet flow path δ.

[0087] As shown in Figures 8 to 10, the liquid W flowing through each liquid guide flow path flows from the first groove side surface 31 and the second groove side surface 32 of the liquid guide groove 25 of each groove group 18 to 21 along the groove inclined surface 33 and is ejected (flows out) into each liquid injection flow path δ.

[0088] Each liquid guide flow path ε directs the liquid W that has flowed into it from the other end face 15B of the piece body 15 toward one end face 15A (groove inclined surface 33) in a straight line in the direction B of the center line b of the piece body 15, changing (diverting) the straight flow to a flow that is inclined at an angle θ1 to one end face 15A of the piece body 15, and sprays (flows out) the liquid W into each liquid injection flow path δ.

[0089] As shown in Figures 8 to 11, the liquid W sprayed into each liquid injection flow path δ flows from the liquid guide groove 25 (second groove side surface 32) of each groove group 18 along the groove bottom surface 36 of the liquid injection groove 26 of each groove group 18-21 (groove bottom surface 36 of the liquid injection groove 26 of each groove group 18-21 having an angle θ2 to one end face 15A), and is sprayed (sprayed at high speed) from each liquid injection flow path δ (each injection port P) into the liquid W in the circulation hole 7 between one end face 15A of the piece 15 and the outlet 6 (liquid W in the circulation hole 7 on the one end face 15A side), forming (generating) a vortex φ around the center line of the circulation hole 7 in the liquid W on the inner circumferential surface 7a side of the circulation hole 7. The liquid W sprayed into each liquid injection flow path δ is sprayed (sprayed at high speed) from each liquid injection flow path δ (each injection port P) in the same circumferential direction (one direction) of the cylindrical body 1 (internal flow hole 7) toward the liquid W in the internal flow hole 7 on one end face 15A side, forming a vortex φ around the center line of the internal flow hole 7 on the internal flow hole 7a side on one end face 15A side.

[0090] The liquid W injected from each liquid injection path δ into the liquid W in the flow hole 7 (the liquid W in the flow hole 7 on one end face 15A side) forms (generates) a vortex φ around the center line of the flow hole 7 in the liquid W on the inner circumferential surface 7a side of one flow hole 7 downstream (on the outlet 6 side) of each injection port P (each liquid injection flow path δ), as shown in Figure 11.

[0091] As shown in Figures 8 to 11, each liquid injection flow path δ injects the liquid W ejected from each liquid guide flow path ε onto the liquid W on the inner surface 7a of the circulation hole 7 on one end face 15A side, thereby forming (generating) a vortex φ around the center line of the circulation hole 7 in the liquid W on the inner surface 7a of the circulation hole 7. Each liquid injection flow path δ causes the liquid W ejected from each liquid guide flow path ε to flow from the liquid guide groove 25 (second groove side surface 32) of each groove group 18 along the groove bottom surface 36 of the liquid injection groove 26 of each groove group 18-21 (groove bottom surface 36 of the liquid injection groove 26 of each groove group 18-21 having the second acute angle θ2 on one end face 15A), while injecting (at high speed) from each liquid injection flow path δ (each injection port P) into the liquid W in the circulation hole 7 between one end face 15A of the piece 15 and the outlet 6 (liquid W in the circulation hole 7 on the one end face 15A side), forming a vortex φ in the liquid W on the hole inner surface 7a side of the circulation hole 7.

[0092] 11 , each liquid jetting flow path δ jets (at high speed) the liquid W jetted from each liquid guide flow path ε toward the liquid W in the flow holes 7 on the one end face 15A side in the same circumferential direction (one direction) of the cylinder 1 (flow holes 7), forming a vortex flow φ around the center line of the flow holes 7 on the one end face 15A side, toward the inner circumferential surface 7a of the flow holes 7. Each liquid jetting flow path δ jets (at high speed) the liquid W jetted from each liquid guide flow path ε from each liquid jetting flow path δ (each jetting port P) toward the liquid W in the flow holes 7 on the one end face 15A side, forming a vortex flow φ around the center line of the flow holes 7 in the liquid W on the inner circumferential surface 7a of the flow holes 7 (liquid W in the flow holes 7 on the one end face 15A side) downstream (toward the outlet 7) of each jetting port P (each liquid jetting flow path δ / one end face 15A). Each liquid injection flow path δ causes the liquid W ejected from each liquid guide flow path ε to flow inclined at an angle θ2 toward one end face 15A, and injects (high-speed injection) the liquid W in the circulation hole 7 on the one end face 15A side, thereby forming a vortex φ in the liquid W on the hole inner surface 7a side of the circulation hole 7 (the liquid W in the circulation hole 7 on the one end face 15A side).

[0093] 5, the vortex flow φ (vortex flow 1) is formed by the liquid W from each liquid injection flow path δ being injected toward one end face 15A, and flowing in one direction around the center line a of the flow hole 7 in the circumferential direction of the cylindrical body 1 (flow hole 7) along the hole inner circumferential surface 7a of the flow hole 7. The vortex flow φ is formed on the one end face 15A side of the piece 15, on the hole inner circumferential surface 7a side of the flow hole 7, by the liquid W from each liquid injection flow path δ being injected toward one end face 15A side.

[0094] The liquid W injected from each liquid injection flow path δ into the liquid W in the flow hole 7 (the liquid W in the flow hole 7 on the one end face 15A side) forms a vortex φ in the liquid W in the flow hole 7 between the one end face 15A of the piece 15 and the outlet 6, as shown in Figure 5, and flows at a slower rate from the one end face 15A of the piece 15 toward the outlet 6 together with the liquid W (liquid W on the one end face 15A side) in contact with the one end face 15A inside each liquid injection flow path δ (each injection port P / vortex φ).

[0095] The liquid W in the flow hole 7 on one end face 15A side of the piece 15 becomes a turbulent flow due to the vortex flow φ, and flows from one end face 15A of the piece 15 toward the outlet 7. The gas (air) in the liquid W flowing from one end face 15A of the piece 15 toward the outlet 7 is pulverized (sheared) by the turbulent flow (vortex flow φ) into a large amount (numerous) of microbubbles and a large amount (numerous) of ultrafine bubbles.

[0096] The static pressure (static pressure of water) of the liquid W (liquid W on the one end surface 15A side) that is in contact with one end surface 15A of the piece 15 inside the vortex φ (each liquid injection flow path δ / each injection port P) decreases and becomes a negative pressure state (low pressure state) when the vortex φ is formed in the liquid W on the hole inner surface 7a side of the flow hole 7.

[0097] The liquid W (liquid W on the one end face 15A side) that comes into contact with one end face 15A inside the vortex φ (each liquid injection flow path δ / each injection port P) flows from the one end face 15A toward the outlet 6 while generating cavitation due to the negative pressure state (pressure drop), as shown in Figure 5.

[0098] When cavitation occurs in the liquid W (liquid W on the side of one end face 15A) that comes into contact with one end face 15A inside the vortex φ (each liquid injection flow path δ / each injection port P) that flows from one end face 15A toward the outlet 6, the gas (air) in the liquid (water) [dissolved gas / dissolved air] is split into a large number (numerous) of microbubbles and a large number (numerous) of ultrafine bubbles [precipitated as a large number (numerous) of microbubbles and a large number (numerous) of ultrafine bubbles].

[0099] A large number (numerous) of microbubbles and ultrafine bubbles generated by the vortex flow φ (turbulence) and a large number (numerous) of microbubbles and ultrafine bubbles generated by cavitation are mixed into and dissolved in the liquid W, becoming a large number (numerous) of microbubbles and a large number (numerous) mixed and dissolved bubble liquid (bubble water), which flows from one end face 15A through the communication holes 7 toward the outlet 6 and is discharged from the outlet 6. As shown in FIG. 5, a large number (numerous) of microbubbles and a large number (numerous) mixed and dissolved bubble liquid (gas-entrained liquid) flows from one end face 15A through the communication holes 7 toward the outlet 6 and is discharged from the outlet 6.

[0100] As shown in Figures 8 to 11, the cavitation generator X is arranged within the flow hole 7 with one end face 15A, which is approximately planar (flat), positioned approximately perpendicular (orthogonal) to the center line a of the flow hole 7, and forms a vortex φ around the center line of the flow hole 7 in the liquid W on the side of the one end face 15A between the one end face 15A of the piece 15 and the outlet 6, on the side of the inner circumferential surface 7a of the flow hole 7, thereby generating a stable negative pressure state (low pressure state) in the liquid W (liquid W on the side of the one end face 15A) in contact with the one end face 15A of the piece 15 inside the vortex φ (each liquid injection flow path δ / each injection port P). In the cavity generating device X, a stable negative pressure state (low pressure state) is generated in the liquid W (liquid W on the one end face 15A side) that contacts one end face 15A of the piece 15 inside the vortex φ (each liquid injection flow path δ / each injection port P), thereby generating stable cavitation in the liquid W that flows from one end face 15A inside the vortex φ to the outlet 6, and a large amount (numerous) of microbubbles and a large amount (numerous) of mixed or dissolved bubble liquid (bubble water) generated by the cavitation and vortex φ can be generated, and can flow out from the outlet 6. [Industrial Applicability]

[0101] The present invention is ideal for discharging bubble liquid containing microbubbles and ultrafine bubbles. [Explanation of symbols]

[0102] X Cavitation Generator 1 cylinder 5 Inlet 6 Outlet 7 Distribution hole (flow path) 7a Hole inner surface 15 Piece body (piece) 15A One end face (column end face) 15B Other end face (column end face) 15C Outer surface 18~21 Groove group 25 Liquid guide groove 26 Liquid injection groove 31 First groove side 32 Second groove side 33 Groove inclined surface (first groove bottom surface) 35 groove side 36 Groove bottom (second groove bottom) ε Liquid guide channel δ Liquid injection channel

Claims

1. the cylindrical body having an inlet, an outlet, and a circulation hole formed between the inlet and the outlet, wherein a liquid flows from the inlet into the circulation hole and the liquid that has flowed into the circulation hole flows out from the outlet; and a columnar piece body having a plurality of groove groups, The piece is The bearing has one end surface formed in a substantially flat shape substantially perpendicular to the center line of the piece, the other end surface, and an outer circumferential surface disposed between the end surfaces, Each of the groove groups is a liquid guide groove having a groove depth from the outer peripheral surface toward the center line of the piece, the groove opening on the outer peripheral surface and the other end surface, and formed between the end surfaces; a liquid injection groove communicating with the liquid guide groove; Each of the liquid injection grooves is a groove having a groove depth from one of the end faces, the groove being open to one of the end faces and the liquid guide grooves; The liquid ejection grooves are opened at one end surface at equal intervals in the circumferential direction of the piece body, a groove having a width narrower than the distance between the outer peripheral surface and the center line, the groove being open to one of the end faces and the outer peripheral surface, extending from the outer peripheral surface toward the center line; The piece is a nozzle hole provided in the flow hole at a distance from the inlet and the outlet, with one end face facing the outlet and one end face being substantially perpendicular to a center line of the flow hole and concentric with the flow hole; a plurality of liquid guide flow paths are formed by the inner peripheral surface of the flow hole and each of the liquid guide grooves; a plurality of liquid ejection flow paths are formed by the inner peripheral surface of the flow hole and each of the liquid ejection grooves; Each of the liquid guide channels is the liquid flowing into each of the liquid guide channels from the other end face is caused to flow linearly in the direction of the center line of the piece toward one of the end faces, and the linear flow is changed to a flow inclined at an angle toward one of the end faces, and the liquid is sprayed into each of the liquid spray channels; Each of the liquid jetting channels is The liquid ejected from each of the liquid guide channels is injected into the liquid in the circulation hole on one end face side of the piece body, forming a vortex around the center line of the circulation hole on the inner peripheral surface side of the circulation hole. A cavitation generating device characterized by:

2. the cylindrical body having an inlet, an outlet, and a circulation hole formed between the inlet and the outlet, wherein a liquid flows from the inlet into the circulation hole and the liquid that has flowed into the circulation hole flows out from the outlet; and a columnar piece body having a plurality of groove groups, The piece is The bearing has one end surface formed in a substantially flat shape substantially perpendicular to the center line of the piece, the other end surface, and an outer circumferential surface disposed between the end surfaces, Each of the groove groups is a liquid guide groove having a groove depth from the outer peripheral surface toward the center line of the piece, the groove opening on the outer peripheral surface and the other end surface, and formed between the end surfaces; a liquid injection groove communicating with the liquid guide groove; Each of the liquid guide grooves is a first groove side surface having a surface width from the outer peripheral surface toward the center line, disposed substantially perpendicular to one of the end faces, and formed between a surface end position spaced apart from the one end face by a surface interval and the other end face; a second groove side surface having a surface width from the outer peripheral surface toward the center line, arranged substantially perpendicular to one of the end surfaces, arranged at an interval from the first groove side surface, and formed between the end surfaces; a groove inclined surface that is disposed between the first groove side surface and the second groove side surface, that is angled with respect to one of the end surfaces, and that extends from the surface end position toward the one of the end surfaces, Each of the liquid injection grooves is having a groove bottom surface, a groove having a groove depth from one of the end faces, and opening to the second groove side face between the one of the end faces and the face end position; The liquid ejection grooves are opened at one end surface at equal intervals in the circumferential direction of the piece body, a groove having a width narrower than the distance between the outer peripheral surface and the center line, the groove being open to one of the end faces and the outer peripheral surface, extending from the outer peripheral surface toward the center line; The groove bottom surface is the second groove side surface is disposed between the groove side surface in the width direction of the liquid ejection groove and the outer peripheral surface, and is inclined while extending from the second groove side surface to one of the end surfaces at an angle to the one of the end surfaces, The piece is a nozzle hole provided in the flow hole at a distance from the inlet and the outlet, with one end face facing the outlet and one end face being substantially perpendicular to a center line of the flow hole and concentric with the flow hole; a plurality of liquid guide paths are formed by the inner peripheral surface of the flow hole and each of the liquid guide grooves; The inner peripheral surface of the flow hole and each of the liquid injection grooves form a plurality of liquid injection paths. A cavitation generating device characterized by:

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