Cavitation generator

Abstract

The present invention provides a cavitation generator capable of discharging a liquid with a large amount of microbubbles and a large amount of ultrafine bubbles mixed and dissolved therein. 【Solution means】 In the flow hole, one end face of the component is arranged substantially perpendicular to the hole center line of the flow hole, and on one end face side of the component, a vortex is formed in the liquid on the inner peripheral surface side of the hole of the flow hole, so as to generate a stable negative pressure state in the liquid in contact with one end face of the component inside the vortex. By generating a stable negative pressure state in the liquid in contact with one end face of the component inside the vortex, stable cavitation is generated in the liquid W flowing from one end face inside the vortex to the outlet, and a large amount of microbubbles and a large amount of mixed and dissolved bubble liquid generated by cavitation and vortex are generated and flow out from the outlet.

Description

Technical Field

[0001] The present invention relates to a cavitation generator that discharges a bubble liquid in which microbubbles and ultrafine bubbles are mixed and dissolved.

Background Art

[0002] As a technique for generating microbubbles, Patent Document 1 discloses a shower nozzle. The shower nozzle arranges a flow dividing plate in a first flow path on the upstream side. The flow dividing plate has a number of flow holes that generate a swirling flow in the first flow path, and the swirling flow causes water in which microbubbles are mixed and dissolved to flow out.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, although swirling flow formed by the flow dividing plate can cause water in which a certain amount of microbubbles are mixed and dissolved to flow out, it is desired to increase the amount of microbubbles and ultrafine bubbles mixed and dissolved in the liquid further, and discharge a liquid in which a large amount of microbubbles and a large amount of ultrafine bubbles are mixed and dissolved.

[0005] The present invention aims to provide a cavitation generator that can discharge a bubble liquid in which a large amount of microbubbles and a large amount of ultrafine bubbles are mixed and dissolved.

Means for Solving the Problems

[0006] Claim 1 according to the present invention has an inlet, an outlet, and a flow-through hole formed between the inlet and the outlet. Liquid flows into the flow-through hole from the inlet, and the liquid flowing into the flow-through hole flows out from the outlet. It includes a cylindrical body, and a piece body formed in a columnar shape and having a plurality of groove groups. The piece body has one end face formed in a substantially planar shape that is substantially orthogonal to the center line of the piece body, the other end face, and an outer peripheral surface disposed between the respective end faces. Each of the groove groups has a groove depth from the outer peripheral surface toward the center line side of the piece body, is open to the outer peripheral surface and the other end face, and has a liquid guide groove formed between the respective end faces and a liquid injection groove communicated with the liquid guide groove. Each of the liquid injection grooves has a groove depth from one of the end faces, is open to one of the end faces and the respective liquid guide grooves, and is open to one of the end faces at equal intervals in the circumferential direction of the piece body. From the outer peripheral surface toward the center line side, it has a groove width narrower than the interval between the outer peripheral surface and the center line, is open to one of the end faces and the outer peripheral surface. The piece body is disposed in the flow-through hole at an interval from the inlet and the outlet, with one of the end faces facing the outlet and one of the end faces being disposed concentrically with the flow-through hole and substantially orthogonal to the hole center line of the flow-through hole, and a plurality of liquid guide channels are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid guide grooves. A plurality of liquid injection channels are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid injection grooves. Each of the liquid guide channels linearly flows the liquid flowing into each of the liquid guide channels from the other end face in the direction of the center line of the piece body toward one of the end faces, changes the flow from the linear flow to a flow inclined at an angle to one of the end faces, and ejects the liquid into each of the liquid injection channels. Each of the liquid injection channels injects the liquid ejected from each of the liquid guide channels to one end face side of the piece body and on the inner circumferential surface side of the flow hole onto the liquid to form a vortex around the hole center line of the flow-through hole on the inner peripheral surface side of the hole of the flow-through hole to generate a negative pressure state in the liquid on one end face side that contacts one end face of the piece body inside the eddy current This is a cavitation generator characterized by the above.

[0007] Claim 2 according to the present invention has an inlet, an outlet, and a flow-through hole formed between the inlet and the outlet, and a cylindrical body through which a liquid flows into the flow-through hole from the inlet and flows out of the flow-through hole from the outlet, and a piece body formed in a columnar shape and having a plurality of groove groups. The piece body has one end face formed in a substantially planar shape substantially orthogonal to the center line of the piece body, the other end face, and an outer peripheral face disposed between the respective end faces. Each of the groove groups has a groove depth from the outer peripheral face toward the center line side of the piece body, is opened to the outer peripheral face and the other end face, and has a liquid guide groove formed between the respective end faces and a liquid injection groove communicated with the liquid guide groove. Each of the liquid guide grooves has a face width from the outer peripheral face toward the center line side, is disposed substantially orthogonal to one of the end faces, and has a first groove side face formed between a face end position spaced from one of the end faces and the other end face, and a face width from the outer peripheral face toward the center line side, is disposed substantially orthogonal to one of the end faces, is disposed at a distance from the first groove side face, and has a second groove side face formed between the respective end faces, and a groove inclined face disposed between the first groove side face and the second groove side face and inclined while extending from the face end position to one of the end faces. Each of the liquid injection grooves has a groove bottom face, has a groove depth from one of the end faces, is opened to the second groove side face 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. The groove bottom face is disposed between a groove side face in the width direction of the liquid injection groove and the outer peripheral face, is inclined while extending from the second groove side face to one of the end faces at an angle to one of the end faces. The piece body is disposed in the flow-through hole at a distance from the inlet and the outlet, with one of the end faces facing the outlet and disposed concentrically with the flow-through hole substantially orthogonal to the hole center line of the flow-through hole, and a plurality of liquid guides are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid guide grooves, and a plurality of liquid injections are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid injection grooves. of the first groove side surface It has, and each of the liquid injection grooves has a groove bottom face, has a groove depth from one of the end faces, in the direction of the center line of the piece body, with a groove interval at the face end position is opened to the second groove side face 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. from the outer circumferential surface of the piece body toward the center line, having a groove width narrower than the face width of the second groove side surface, and opening to the second groove side surface The groove bottom face is disposed between a groove side face in the width direction of the liquid injection groove and the outer peripheral face, is inclined while extending from the second groove side face to one of the end faces at an angle to one of the end faces. The piece body is disposed in the flow-through hole at a distance from the inlet and the outlet, with one of the end faces facing the outlet and disposed concentrically with the flow-through hole substantially orthogonal to the hole center line of the flow-through hole, and flow path a plurality of liquid guides are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid guide grooves, and flow path a plurality of liquid injections are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid injection grooves. and the liquid flowing into the flow hole on the inlet side flows into each liquid guide flow path from the other end face of the piece body. The liquid flowing into each liquid guide flow path flows along the first groove side surface and the second groove side surface toward the groove inclined surface of each liquid guide flow path, collides with the groove inclined surface of each liquid guide flow path, flows along the groove inclined surface of each liquid guide flow path, and is ejected into each liquid injection flow path. Each liquid injection flow path injects the liquid ejected from each liquid guide flow path onto the liquid on one end face side of the piece body and on the inner circumferential surface side of the flow hole to form a vortex around the hole center line of the flow hole on the inner circumferential surface side of the flow hole, and generates a negative pressure state in the liquid on one end face side that contacts one end face of the piece body inside the vortex It is a cavitation generator characterized by this. Claim 3 according to the present invention is that the piece body has a plurality of groove holes. Each groove hole is arranged on the other end face side of the piece body in the direction of the center line of the piece body, penetrates the piece body between the liquid guide grooves of each groove group in the circumferential direction of the piece body, and opens to adjacent liquid guide grooves. The liquid guide grooves of each groove group are communicated through each groove hole, which is a cavitation generation device according to claim 1 Claim 4 according to the present invention is that the piece body has a plurality of groove holes. Each groove hole is arranged on the other end face side of the piece body at an interval from the face end position in the direction of the center line of the piece body, penetrates the piece body between the liquid guide grooves of each groove group in the circumferential direction of the piece body, and opens to adjacent liquid guide grooves. The liquid guide grooves of each groove group are communicated through each groove hole, which is a cavitation generation device according to claim 2

Advantages of the Invention

[0008] In the present invention, in the flow hole, one substantially planar end face is arranged substantially perpendicular (orthogonal) to the hole center line of the flow hole, on one end face side of the game piece, and a vortex around the hole center line of the flow hole is formed in the liquid on the inner peripheral surface side of the hole of the flow hole, so that a stable negative pressure state (low pressure state) can be generated in the liquid (liquid on one end face side) in contact with one end face of the game piece inside the vortex (each liquid injection flow path). According to the present invention, by generating a stable negative pressure state (low pressure state) in the liquid (liquid on one end face side) in contact with one end face of the game piece inside the vortex (each liquid injection flow path), stable cavitation can be generated in the liquid flowing from one end face inside the vortex to the outlet, and a large amount (a large number) of microbubbles and a large amount (a large number) of mixed and dissolved bubble liquids (bubble water) generated by cavitation and the vortex can be generated and flow out from the outlet. It should be noted that the international standard "ISO20480-1" of the International Organization for Standardization (ISO) defines bubbles of 1 micrometer (μm) or more and 100 micrometers (μm) as "microbubbles" and bubbles of less than 1 micrometer (μm) as "ultra-fine bubbles" (the same hereinafter).

Brief Description of the Drawings

[0009]

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Mode for Carrying Out the Invention

[0010] The cavitation generator according to the present invention will be described with reference to FIGS. 1 to 21.

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

[0012] The cylinder body 1 is formed, for example, in a cylindrical shape (cylindrical body). As shown in FIGS. 1 to 12, the cylinder body 1 has an inflow cylinder main body 3, an outflow cylinder main body 4 (outflow cylinder portion), an inflow port 5, an outflow port 6, and a circulation hole 7 (circulation path).

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

[0014] As shown in FIGS. 1 to 5, 8, and 9, the connecting cylinder portion 8 is externally fitted to one cylinder end 9A side of the inflow cylinder portion 9 in the direction A of the cylinder center line a of the inflow cylinder portion 9 (inflow cylinder main body 3), and is fixed to the inflow cylinder portion 9 (outer peripheral surface of the inflow cylinder portion 9). The connecting cylinder portion 8 is arranged to protrude from one cylinder end 9A of the inflow cylinder portion 9 in the direction A of the cylinder center line a of the inflow cylinder portion f9. The female screw portion 10 is formed on the inner peripheral surface of the connecting cylinder portion 8.

[0015] [[ID=H11]] The outflow cylinder main body 4 is formed, for example, in a cylindrical shape (cylindrical body). As shown in FIGS. 1 to 5, 8, and 9, the outflow cylinder main body 4 has a male screw portion 11. The male screw portion 11 is arranged at one cylinder end 4A of the outflow cylinder main body 4 in the direction A of the cylinder center line a of the outflow cylinder main body 4. The male screw portion 11 is formed on the outer peripheral surface of the outflow cylinder main body 4.

[0016] As shown in FIGS. 4 and 5, the inflow port 5 is formed in the inflow cylinder main body 3 (inflow cylinder portion 9). The inflow port 5 opens at the other cylinder end 9B of the inflow cylinder portion 9 in the direction A of the cylinder center line a of the inflow cylinder main body 3, and communicates with the inside of the inflow cylinder portion 9 (inside the inflow cylinder main body 4 / inside the cylinder body 1).

[0017] As shown in FIGS. 1, 3, and 5, the outflow port 6 is formed in the outflow cylinder main body 4. The outflow port 6 opens at the other cylinder end 4B of the outflow cylinder main body 4 in the direction A of the cylinder center line a of the outflow cylinder main body f4, and communicates with the inside of the outflow cylinder main body 4 (inside the cylinder body 1).

[0018] As shown in FIGS. 1, 2, 5, and 7, the cylinder body 1 is formed by connecting an inflow cylinder main body 3 and an outflow cylinder main body 4.

[0019] In the cylinder body 1, as shown in FIGS. 5 and 7, the outflow cylinder main body 4 is arranged concentrically with the inflow cylinder main body 3. The outflow cylinder main body 4 is screwed (threaded) into the female screw portion 10 of the outflow cylinder main body 3 (connecting cylinder portion 8) with the male screw portion 11, and is connected to the inflow cylinder main body 3 (connecting cylinder portion 8, inflow cylinder portion 9).

[0020] As shown in FIGS. 3, 5, and 7, when the cylinder body 1 connects the inflow cylinder main body 3 and the outflow cylinder main body 4, a flow-through hole 7 is formed inside the cylinder body 1 (inflow cylinder main body 3 and outflow cylinder main body 4). The flow-through hole 7 (flow path) is formed in a circular shape (circular hole). The flow-through hole 7 is formed between the inlet 5 and the outlet 6 in the direction A of the cylinder center line a of the cylinder body 1 (inflow cylinder main body 3 and outflow cylinder main body 4).

[0021] As shown in FIGS. 3 to 5, the flow-through hole 7 is formed concentrically with the cylinder body 1. The flow-through hole 7 communicates with the inlet 5 and the outlet 6. The other cylinder end 9B (cylinder end face) of the inflow cylinder portion 9 (inflow cylinder main body 3) becomes one cylinder end (cylinder end face) of the cylinder body 1. The other cylinder end (cylinder end face) of the outflow cylinder main body 4 becomes the other cylinder end (cylinder end face) of the cylinder body 1. The inlet 5 opens at one cylinder end of the cylinder body 1 and communicates with the flow-through hole 7. The outlet 6 opens at the other cylinder end of the cylinder body 1 and communicates with the flow-through hole 7.

[0022] As shown in FIG. 5, in the cylinder body 1, the liquid W (water) flows into the flow-through hole 7 from the inlet 5. In the cylinder body 1, the liquid W that has flowed into the flow-through hole 7 from the inlet 5 flows out from the outlet 6. The liquid W flows into the flow-through hole 7 from the inlet 5, flows through the flow-through hole 7 toward the outlet 6, and flows out from the outlet 6.

[0023] As shown in FIGS. 13 to 21, the vortex guide 2 (cavitation generator X) has a piece body 15 (piece) and a piece support ring 16.

[0024] As shown in FIGS. 13 to 21, the piece body 15 has a plurality (e.g., four) of groove groups 18 to 21 and a plurality (e.g., four) of groove holes 22.

[0025] The piece body 15 is formed in a columnar (three-dimensional shape). For example, the piece body 15 is formed in a cylindrical shape. As shown in FIGS. 13 to 21, the piece body 15 has one end face 15A (column end face) formed in a substantially planar (planar) shape that is substantially orthogonal (orthogonal) to the center line b (column center line) of the piece body 15, the other end face 15B (column end face), and an outer peripheral face 15C disposed (formed) between the end faces 15A and 15B. One end face 15A is formed in a substantially flat (plane) shape and is disposed substantially orthogonal (orthogonal) to the center line b of the piece body 15.

[0026] As shown in FIGS. 13 to 21, each of the groove groups 18 to 21 is formed in the piece body 15 at intervals (equal intervals / equal angles) in the circumferential direction of the piece body 15 between the groove groups 18 to 21. Each of the groove groups 18 to 21 has a liquid guide groove 25 (first groove) and a liquid injection groove 26 (second groove) communicating with the liquid guide groove 25.

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

[0028] As shown in FIGS. 13 to 21, the liquid guide grooves 25 of each of the groove groups 18 to 21 (each liquid guide groove 25) open to the other end face 15B (column end face) of the piece body 15 in the direction B of the center line b of the piece body 15 and are disposed (formed) between the end faces 15A and 15B. The liquid guide grooves 25 of each of the groove groups 18 to 21 (each liquid guide groove 25) extend from one end face 15A to the other end face 15B side in the direction B of the center line b of the piece body 15.

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

[0030] As shown in Figs. 13 to 21, the liquid guide grooves 25 of each groove group 18 - 21 have a first groove side surface 31, a second groove side surface 32, and a groove inclined surface 33 (the first groove bottom surface), and are formed (constituted) 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 Figs. 13 to 21, the first groove side surface 31 is arranged with a surface width MH from the outer peripheral surface 15C of the piece body 15 toward the center line b side. The first groove side surface 31 is arranged with a surface width MH between the outer peripheral surface 15C of the piece body 15 and the center line b of the piece body 15. The first groove side surface 31 is formed with a surface width MH from the outer peripheral surface 15C of the piece body 15 toward the center line b of the piece body 15 in the radial direction of the piece body 15. One surface width end 31A of the first groove side surface 31 is located on the outer peripheral surface 15C of the piece body 15. The other surface width end 31B of the first groove side surface 31 is located on the center line b side of the piece body 15.

[0032] As shown in Figs. 13 to 21, the first groove side surface 31 is arranged substantially perpendicular (perpendicular) to one end surface 15A of the piece body 15.

[0033] As shown in Figs. 17 to 20, in the direction B of the center line b of the piece body 15, the first groove side surface 31 is arranged between each end surface 15A, 15B of the piece body 15. In the direction B of the center line b of the piece body 15, the first groove side surface 31 has a surface length ML from the other end surface 15B of the piece body 15 to one end of the piece body 15 End face 15A and extends to.

[0034] The first groove side surface 31 is , Figure As shown in FIGS. 16 to 20, in the direction B of the center line b of the piece body 15, on the other side of the piece body 15 end face is spaced apart from 15B by an interval α2 (surface interval / second surface interval), and a surface end position β that is spaced apart from one end surface 15A of the piece body 15 by an interval α1 (surface interval / first surface interval), and is formed between the other end surface 15B of the piece body 15. The interval α2 is, for example, a larger interval than the interval 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 surface 15B of the piece body 15.

[0035] The second groove side surface 32 is arranged with a surface width NH from the outer peripheral surface 15C of the piece body 15 toward the center line b side as shown in FIGS. 14, 16 to 21. The second groove side surface 32 is arranged with a surface width NH between the outer peripheral surface 15C of the piece body 15 and the center line b of the piece body 15. The second groove side surface 32 is formed with a surface width NH from the outer peripheral surface 15C of the piece body 15 toward the center line b of the piece body 15 in the radial direction of the piece body 15. One surface width end 32A of the second groove side surface 32 is located at the outer peripheral surface 15C of the piece body 15. The other surface width end 32B of the second groove side surface 32 is located on the center line b side of the piece body 15.

[0036] The second groove side surface 32 is arranged substantially orthogonally (perpendicularly) to one end surface 15A of the piece body 15 as shown in FIGS. 17 to 20.

[0037] The second groove side surface 32 is arranged between the end surfaces 15A and 15B of the piece body 15 in the direction B of the center line b of the piece body 15 as shown in FIGS. 14, 16 to 20. The second groove side surface 32 has a surface length NL from the other end surface 15B of the piece body 15 in the direction B of the center line b of the piece body 15 to End face 15A extend to one side of the piece body 15. One surface length end 32C of the second groove side surface 32 is located at one end surface 15A of the piece body 15. The other surface length end 32D of the second groove side surface 32 is located at the other end surface 15B of the piece body 15.

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

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

[0040] As shown in FIGS. 13, 14, and 16 to 21, the groove inclined surface 33 is arranged between the first groove side surface 31 and the second groove side surface 32. The groove inclined surface 33 is arranged across between the respective surface width ends 31A, 31B of the first groove side surface 31 and between the respective surface width ends 32A, 32B of the second groove side surface 32, and is continuously formed on the first groove side surface 31 and the second groove side surface 32.

[0041] As shown in FIGS. 13 and 17 to 20, the groove inclined surface 33 is arranged on the one end face 15A side of the piece body 15 in the direction B of the center line b of the piece body 15. [[ID=I4]]

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

[0043] As shown in FIGS. 13, 15, and 17 to 20, the liquid injection grooves 26 of each of the groove groups 18 to 21 are arranged at equal intervals (equal angles) in the circumferential direction of the piece body 15 between the liquid injection grooves 26 (each liquid injection hole 26) of each of the groove groups 18 to 21, and open to one end face 15A of the piece body 15. The equal intervals (equal angles) between the liquid injection grooves 26 of each of the groove groups 18 to 21 are, for example, at an angle of 90 degrees.

[0044] The liquid injection grooves 26 (each liquid injection groove 26) of each of the groove groups 18 to 21 have injection ports P (openings) that open to one end face 15A of the piece body 15. The injection ports P of each liquid injection groove 26 are opened to one end face 15A at equal intervals (equal angle: 90 degrees) in the circumferential direction of the piece body 15 between the injection ports P.

[0045] As shown in FIGS. 13 to 20, the liquid injection 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.

[0046] As shown in FIGS. 13 to 20, the liquid injection grooves 26 of each of the groove groups 18 to 21 communicate with the liquid guide grooves 25 of the same groove groups 18 to 21 (the same groove group). The liquid injection grooves 26 of each of the groove groups 18 to 21 communicate with each of the liquid guide grooves 25 of each of the groove groups 18 to 21.

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

[0048] As shown in Fig. 15, each liquid injection groove 26 (each liquid injection groove 26) of each groove group 18 - 21 has a groove width gh narrower than the interval (radius r of the piece body 17) between the outer peripheral surface 15C of the piece body 15 and the center line b of the piece body 15, from the outer peripheral surface 15C of the piece body 15 to the center line b side of the piece body 15 (between the outer peripheral surface 15C of the piece body 15 and the center line b), and is opened to one end face 15A of the piece body 15 and the outer peripheral surface 15C of the piece body 15. Each liquid injection groove 26 of each groove group 18 - 21 is formed with a groove width gh from the outer peripheral surface 15C of the piece body 15 toward the center line b of the piece body 15 in the radial direction of the piece body 15. The groove width gh is, for example, a width equal to or less than half [one - half (1 / 2)] of the interval (radius r of the piece body 17) between the outer peripheral surface 15C of the piece body 15 and the center line b of the piece body 15.

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

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

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

[0052] Each liquid injection groove 26 (each liquid injection groove 26) of the groove groups 18 to 21 is opened to the second guide side face 32 (each liquid guide groove 25) between one end face 15A of the piece body 15 and the face end position β (one face length end 31C of the first groove side face 31) in the direction B of the center line b of the piece body 15. Each liquid injection groove 26 of the groove groups 18 to 21 is opened to each of the second groove side faces 32 (each liquid guide groove 25) of the liquid guide grooves 25 of the groove groups 18 to 21 between one end face 15A of the piece body 15 and the face end position β.

[0053] As shown in FIGS. 17 to 20, each liquid injection groove 26 of the groove groups 18 to 21 is opened to the second groove side face 32 between one end face 15A and the face end face β with a groove interval γ from the face end position β in the direction B of the center line b of the piece body 15.

[0054] Each liquid injection groove 26 (each liquid injection groove 26) of the groove groups 18 to 21 is opened to the second groove side face 32 of the liquid guide grooves 25 of the same groove groups 18 to 21 (the same groove group). The liquid injection groove 26 of the groove group 18 is opened to the second groove side face 32 of the liquid guide groove 25 of the groove group 18. The liquid injection groove 26 of the groove group 19 is opened to the second groove side face 32 of the liquid guide groove 25 of the groove group 19. The liquid injection groove 26 of the groove group 20 is opened to the second groove side face 32 of the liquid guide groove 25 of the groove group 20. The liquid injection groove 26 of the groove group 21 is opened to the second groove side face 32 of the liquid guide groove 25 of the groove group 21.

[0055] As shown in FIGS. 13 to 15, each liquid injection groove 26 (each liquid injection groove 26) of the groove groups 18 to 21 has a groove width gh (opening width) narrower than the surface width NH of the second groove side surface 32 between the outer peripheral surface 17C of the piece body 17 and the center line b (in the radial direction of the piece body 17), and is opened to each of the second groove side surfaces 32 of the liquid guide grooves 25 of the groove groups 18 to 21 from the outer peripheral surface 17C of the piece body 17 toward the center line b. Each liquid injection groove 26 of the groove groups 18 to 21 is opened to the second groove side surface 32 and communicates with the liquid guide grooves 25 (between the first groove side surface 31 and the second groove side surface 32) of the groove groups 18 to 21.

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

[0057] As shown in FIGS. 17 to 20, the groove bottom surface 36 forms an angle θ2 (second angle / second acute angle) with one end surface 15A of the piece body 15, and is inclined while extending from the second groove side surface 32 (the second groove side surface 32 where the liquid injection groove 26 opens) of the liquid guide groove 25 of each groove group 18 to 21 to one end surface 15A of the piece body 15. The angle θ2 (acute angle) is an angle greater than 0 degrees and less than 90 degrees, and is, for example, 50 degrees (θ2 = 50 degrees).

[0058] As shown in FIGS. 17 to 20, the groove bottom surface 36 forms a second acute angle θ2 (acute angle) with one end surface 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 port P) of the liquid guide groove 25 of each groove group 18 to 21 to one end surface 15A of the piece body 15, and extends to the other opening length end p2 of the injection port P.

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

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

[0061] As shown in FIGS. 13, 14, and 16 to 20, each groove hole 22 is formed in the piece body 15. Each groove hole 2 is arranged on the other end surface 15B side of the piece body 15 at an interval from 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 body 15. Each groove hole 22 penetrates the piece body 15 between the liquid guide grooves 25 of each groove group 18 to 21 in the circumferential direction of the piece body 15 and opens into adjacent liquid guide grooves 25. Each groove hole 22 opens to the other end surface 15B of the piece body 15. The liquid guide grooves 25 of each groove group 18 to 21 are communicated through each groove hole 22 on the other end surface 15B side of the piece body 15.

[0062] As shown in FIG. 5, the vortex guide 2 is arranged in the flow-through hole 7 with an interval σ from the inlet 5 and an interval λ from the outlet 6. The vortex guide 2 is arranged in the flow-through hole 7 with one end surface 15A of the piece body 15 substantially perpendicular (perpendicular) to the hole center line a of the flow-through hole 7 (the cylinder center line a of the cylinder body 1). The vortex guide 2 is arranged in the flow-through hole 7 with the piece body 15 concentric with the flow-through hole 17 (cylinder body 1). As shown in FIGS. 3 to 5 and FIG. 7, the vortex guide 2 is arranged in the flow-through hole 7 with one end surface 15A (each injection port P) of the piece body 15 facing the outlet 6 and the other end surface 15B (the ring back surface 16B of the piece support ring 16) facing the inlet 5.

[0063] As shown in FIGS. 5 and 7, the eddy current guide 2 is disposed between one cylinder end 9A of the inflow cylinder portion 9 (inflow cylinder main body 3) and one cylinder end 4A of the outflow cylinder main body 4, and is fixed to the cylinder body 1. The eddy current guide 2 is fixed to the cylinder body 1 by bringing the ring back surface 16B of the piece support ring 16 into contact with one cylinder end 9A of the inflow cylinder portion 9 and bringing the ring back surface 16A of the piece support ring 16 into contact with one cylinder end 4A of the outflow cylinder main body 4. As shown in FIG. 7, the outflow cylinder portion 9 and the outflow cylinder main body 4 sandwich the piece support ring 16 between one cylinder end 9A of the inflow cylinder portion 9 and one cylinder end 4A of the outflow cylinder main body 4, thereby fixing the eddy current guide 2 (piece body 15, piece support ring 16) to the cylinder body 1.

[0064] As shown in FIGS. 3 to 9, the piece body 15 is disposed in the flow-through hole 7 (in the flow path). As shown in FIG. 5, the piece body 15 is disposed in the flow-through hole 7 with intervals σ and λ between the inlet 5 and the outlet 6. The piece body 15 is disposed in the flow-through hole 7 (flow path) with an interval λ between one end face 15A and the outlet 6 and an interval α between the other end face 15B and the inlet 5. The piece body 15 is fixed to the cylinder body 1.

[0065] As shown in FIG. 5, the piece body 15 is disposed concentrically with the flow-through 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 body 15 is disposed concentrically with the flow-through hole 7 with one substantially planar (planar) end face 15A substantially orthogonal (orthogonal) to the hole center line a of the flow-through hole 7 (the cylinder center line a of the cylinder body 1). One end face 15A is disposed substantially orthogonal (orthogonal) to the hole center line a of the flow-through hole 7 (the cylinder center line a of the cylinder body 1) within the flow-through hole 7.

[0066] As shown in FIGS. 3, 5, 6 to 11, the piece body 15 is disposed in the flow-through hole 7 with a slight gap between the outer peripheral surface 15C of the piece body 15 and the inner peripheral surface 7a of the hole of the flow-through hole 7 (the inner peripheral surface of the cylinder body 1), or the outer peripheral surface 15C of the piece body 15 is in contact with the inner peripheral surface 7a of the hole of the flow-through hole 7 (the inner peripheral surface of the cylinder body 1) and is disposed in the flow-through hole 7.

[0067] As shown in FIGS. 4, 6, and 8 to 11, the piece body 15 forms a liquid guide flow path ε [a plurality (four) of liquid guide flow paths ε] with the inner peripheral surface 7a of the through hole 7 and the liquid guide grooves 25 (each liquid guide groove 25) of each groove group 18 to 21, and is disposed within the through hole 7.

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

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

[0070] As shown in FIGS. 4, 6, 8, and 9, the piece body 15 forms a liquid guide flow path ε [a plurality (four) of liquid guide flow paths ε] between the inner peripheral surface 7a of the through 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, and is disposed within the through hole 7.

[0071] As shown in FIGS. 4, 6, 8, and 9, the circulation hole 7 and the piece body 15 form liquid guide channels ε [a plurality (four) of liquid guide channels ε] between the inner peripheral surface 7a of the hole of the circulation hole 7, the first groove side surface 31 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18-21, the second groove side surface 32 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18-21, and the second groove side surface 32 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18-21. Each liquid guide channel ε is formed between the inner peripheral surface 7a of the hole of the circulation hole 7, the first groove side surface 31 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18-21, the second groove side surface 32 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18-21, and the second groove side surface 32 of the liquid guide groove 25 (each liquid guide groove 25) of each groove group 18-21.

[0072] As shown in FIGS. 3, 7 to 11, the piece body 15 forms liquid injection channels δ [a plurality (four) of liquid injection channels δ] with the inner peripheral surface 7a of the hole of the circulation hole 7 and the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18-21, and is disposed in the circulation hole 7.

[0073] As shown in FIGS. 3, 7 to 11, the circulation hole 7 and the piece body 15 form liquid injection channels δ [a plurality (four) of liquid injection channels δ] with the inner peripheral surface 7a of the hole of the circulation hole 7 and the liquid injection grooves 26 of each groove group 18-21.

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

[0075] Each liquid injection channel δ is formed (constituted) by the inner peripheral surface 7a of the hole of the circulation hole 7 and the liquid injection grooves 26 of each groove group 18-21. Each liquid injection channel δ is opened to one end surface 15A of the piece body 15 and communicates with each injection port P and the circulation hole 7 on the side of the outflow port 6.

[0076] As shown in FIGS. 7 to 10, the piece body 15 forms liquid injection channels δ [a plurality (four) of liquid injection channels δ] between the inner peripheral surface 7a of the through 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, and is disposed within the through hole 7.

[0077] As shown in FIGS. 7 to 9, the through hole 7 and the piece body 15 form liquid injection channels δ [a plurality (four) of liquid injection channels δ] between the inner peripheral surface 7a of the through 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 channel ε is formed between the inner peripheral surface 7a of the through hole 7, the groove side surfaces 36 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 the liquid injection grooves 26 (each liquid injection groove 26) of each groove group 18 to 21.

[0079] As shown in FIGS. 7 to 10, each liquid injection channel δ communicates with each liquid guide channel ε. The liquid injection channel δ formed by the inner peripheral surface 7a of the through hole 7 and the liquid injection grooves 26 of each groove group 18 to 21 communicates with the liquid guide groove 25 of the same groove group 18 to 21 (the same groove group) as the liquid injection grooves 26 of each groove group 18 to 21 and the liquid guide channel δ formed by the inner peripheral surface 7a of the through hole 7.

[0080] As shown in FIGS. 7 to 9, the liquid injection channel δ formed by the inner peripheral surface 7a of the through hole 7 and the liquid injection groove 26 of the groove group 18 communicates with the liquid guide channel ε formed by the inner peripheral surface 7a of the through hole 7 and the liquid guide groove 25 of the groove group 18.

[0081] The liquid injection flow path δ formed by the inner peripheral surface 7a of the flow hole 7 and the liquid injection grooves 26 of the groove group 19 communicates with the liquid guide flow path ε formed by the inner peripheral surface 7a of the flow hole 7 and the liquid guide grooves 25 of the groove group 19. The liquid injection flow path δ formed by the inner peripheral surface 7a of the flow hole 7 and the liquid injection grooves 26 of the groove group 20 communicates with the liquid guide flow path ε formed by the inner peripheral surface 7a of the flow hole 7 and the liquid guide grooves 25 of the groove group 20. The liquid injection flow path δ formed by the inner peripheral surface 7a of the flow hole 7 and the liquid injection grooves 26 of the groove group 21 communicates with the liquid guide flow path ε formed by the inner peripheral surface 7a of the flow hole 7 and the liquid guide grooves 25 of the groove group 21.

[0082] As shown in Fig. 5, the cavitation generating device 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 cylinder 1, and liquid W (pressurized liquid / pressurized water) flows into the flow hole 7. As shown in Fig. 5, in the cylinder 1, liquid W flows into the flow hole 7 from the inlet 5, and the liquid W flowing through the flow hole 7 flows out from the outlet 6. In the cavitation generating device X, liquid W flows into the flow hole 7 from the inlet 5, and the inside of the flow hole 7 is filled with liquid W.

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

[0084] From the the other end face 15B of the piece 15, a part of the liquid W flowing into each liquid guide flow path ε flows out into the adjacent liquid guide flow paths ε through each groove hole 22 as shown in Figs. 7 to 10.

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

[0086] The liquid W flowing through each liquid guide channel ε abuts (collides) against the groove inclined surface 33 of the liquid guide groove 25 of each groove group 18 to 21 and flows toward each liquid injection channel δ along the groove inclined surface 33 of the liquid guide groove 25 of each groove group 18 to 21, as shown in FIGS. 8 to 10. The liquid W flowing through each liquid guide channel ε is changed by the groove inclined surface 33 of the liquid guide groove 25 of each groove group 18 to 21 from a linear flow in the direction B of the center line b of the piece body 15 to a flow inclined at an angle θ1 to one end surface 15A of the piece body 15 and flows toward each liquid injection channel δ.

[0087] The liquid W flowing through each liquid guide channel flows along the groove inclined surface 33 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 and is ejected (flows out) into each liquid injection channel δ, as shown in FIGS. 8 to 10.

[0088] Each liquid guide channel ε linearly flows the liquid W flowing into each liquid guide channel ε from the other end surface 15B of the piece body 15 toward one end surface 15A (groove inclined surface 33) in the direction B of the center line b of the piece body 15, changes (transforms the flow) from a linear flow to a flow inclined at an angle θ1 to one end surface 15A of the piece body 15, and ejects (flows out) the liquid W into each liquid injection channel δ.

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

[0090] As shown in FIG. 11, the liquid W ejected from each liquid injection 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 (generates) a vortex φ around the hole center line of the flow hole 7 in the liquid W on the inner peripheral surface 7a side of the hole of one flow hole 7 downstream (on the outlet 6 side) of each injection port P (each liquid injection flow path δ).

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

[0092] As shown in Fig. 11, each liquid injection flow path δ injects (high-speed injects) the liquid W ejected from each liquid guide flow path ε into the liquid W in the circulation hole 7 on the one end face 15A side in the same direction (one direction) in the circumferential direction of the cylinder body 1 (circulation hole 7), and forms a vortex φ around the hole center line of the circulation hole 7 on the inner peripheral surface 7a side of the hole of the circulation hole 7 on the one end face 15A side. Each liquid injection flow path δ injects (high-speed injects) the liquid W ejected from each liquid guide flow path ε from each liquid injection flow path δ (each injection port P) into the liquid W in the circulation hole 7 on the one end face 15A side, and forms a vortex φ around the hole center line of the circulation hole 7 in the liquid W on the inner peripheral surface 7a side of the hole of the circulation hole 7 (the liquid W in the circulation hole 7 on the one end face 15A side) on the downstream side (outlet 7 side) of each injection port P (each liquid injection flow path δ / one end face 15A). Each liquid injection flow path δ makes the liquid W ejected from each liquid guide flow path ε into a flow inclined at an angle θ2 to the one end face 15A, injects (high-speed injects) it into the liquid W in the circulation hole 7 on the one end face 15A side, and forms a vortex φ in the liquid W on the inner peripheral surface 7a side of the hole of the circulation hole 7 (the liquid W in the circulation hole 7 on the one end face 15A side).

[0093] As shown in Fig. 5, the vortex φ (the vortex of ①) is formed by the injection of the liquid W in each liquid injection flow path δ toward the one end face 15A side, flowing in one direction along the inner peripheral surface 7a of the circulation hole 7 in the circumferential direction of the cylinder body 1 (circulation hole 7) with the hole center line a of the circulation hole 7 as the center. The vortex φ is formed on the inner peripheral surface 7a side of the hole of the circulation hole 7 on the one end face 15A side of the piece body 15 by the injection of the liquid W in each liquid injection flow path δ toward the one end face 15A side.

[0094] As shown in Fig. 5, the liquid W injected from each liquid injection flow path δ into the liquid W in the circulation hole 7 (the liquid W in the circulation hole 7 on the one end face 15A side) forms a vortex φ in the liquid W in the circulation hole 7 between the one end face 15A of the piece body 15 and the outlet 6, and flows while decelerating from the one end face 15A of the piece body 15 toward the outlet 6 together with the liquid W (the 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 the side of one end face 15A of the piece body 15 becomes turbulent in the vortex φ and flows from one end face 15A of the piece body 15 toward the outlet 7. The gas (air) in the liquid W flowing from one end face 15A of the piece body 15 toward the outlet 7 is pulverized (sheared) into a large amount (a large number) of microbubbles and a large amount (a large number) of ultrafine bubbles by the turbulent flow (vortex φ).

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

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

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

[0099] A large number of microbubbles and a large number of ultrafine bubbles generated by the vortex φ (turbulent flow), and a large number of microbubbles and a large number of ultrafine bubbles generated by cavitation are mixed and dissolved in the liquid W, becoming a large number of microbubbles and a large number of mixed and dissolved bubble liquids (bubble water), flowing through the inside of the flow hole 7 from one end face 15A toward the outlet 6, and flowing out from the outlet 6. A large number of microbubbles and a large number of mixed and dissolved bubble liquids (gas-mixed liquid) flow through the inside of the flow hole 7 from one end face 15A toward the outlet 6 and flow out from the outlet 6 as shown in FIG. 5.

[0100] As shown in FIGS. 8 to 11, the cavitation generator X arranges one end face 15A having a substantially planar shape (plane) in the flow hole 7 substantially orthogonally (orthogonal) to the hole center line a of the flow hole 7, on the side of one end face 15A between one end face 15A of the piece body 15 and the outlet 6, and on the side of the liquid W on the inner peripheral surface 7a of the hole of the flow hole 7, and forms a vortex φ around the hole center line of the flow hole 7 in the liquid W, so that a stable negative pressure state (low pressure state) can be generated in the liquid W (the liquid W on the side of one end face 15A) in contact with one end face 15A of the piece body 15 inside the vortex φ (each liquid injection flow path δ / each injection port P). In the cavitation generator X, by generating a stable negative pressure state (low pressure state) in the liquid W (the liquid W on the side of one end face 15A) in contact with one end face 15A of the piece body 15 inside the vortex φ (each liquid injection flow path δ / each injection port P), stable cavitation can be generated in the liquid W flowing from one end face 15A inside the vortex φ to the outlet 6, and a large number of microbubbles and a large number of mixed and dissolved bubble liquids (bubble water) generated by cavitation and the vortex φ can be generated and flow out from the outlet 6.

Industrial Applicability

[0101] The present invention is optimal for flowing out a bubble liquid in which microbubbles and ultrafine bubbles are mixed and dissolved.

Explanation of Signs

[0102] X Cavitation Generator 1 Cylinder 5 Inlet 6 Outlet 7 Flow-through Hole (Flow Path) 7a Inner Peripheral Surface of Hole 15 Spacer 15A One End Face (Column End Face) 15B The Other End Face (Column End Face) 15C Outer Peripheral Surface 18 - 21 Groove Group 25 Liquid Guide Groove 26 Liquid Injection Groove 31 First Groove Side Surface 32 Second Groove Side Surface 33 Groove Inclined Surface (First Groove Bottom Surface) 35 Groove Side Surface 36 Groove Bottom Surface (Second Groove Bottom Surface) ε Liquid Guide Flow Path δ Liquid Injection Flow Path

Claims

1. A cylindrical body having an inlet, an outlet, and a flow-through hole formed between the inlet and the outlet, through which liquid flows into the flow-through hole from the inlet and outflows from the outlet, and a piece body formed in a columnar shape and having a plurality of groove groups. The piece body has one end face formed in a substantially planar shape that is substantially orthogonal to the center line of the piece body, the other end face, and an outer peripheral surface disposed between the respective end faces. Each of the groove groups has a groove depth from the outer peripheral surface toward the center line side of the piece body, is open to the outer peripheral surface and the other end face, and is a liquid guide groove formed between the respective end faces. and a liquid injection groove communicated with the liquid guide groove. Each of the liquid injection grooves has a groove depth from one of the end faces, is open to one of the end faces and the respective liquid guide grooves, is open to one of the end faces at equal intervals in the circumferential direction of the piece body between the respective liquid injection grooves, has 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 side, and is open to one of the end faces and the outer peripheral surface. The piece body is disposed in the flow-through hole at an interval from the inlet and the outlet, with one of the end faces facing the outlet and one of the end faces disposed concentrically with the flow-through hole and substantially orthogonal to the hole center line of the flow-through hole. A plurality of liquid guide channels are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid guide grooves. A plurality of liquid injection channels are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid injection grooves. Each of the liquid guide channels flows the liquid flowing into each of the liquid guide channels from the other end face linearly in the direction of the center line of the piece body toward one of the end faces, changes the linear flow into a flow inclined at an angle to one of the end faces, and ejects the liquid into each of the liquid injection channels. Each of the liquid injection channels ejects the liquid ejected from each of the liquid guide channels onto the liquid on the side of one end face of the piece body and on the inner peripheral surface side of the hole of the flow-through hole, forms a vortex around the hole center line of the flow-through hole on the inner peripheral surface side of the hole of the flow-through hole, and generates a negative pressure state in the liquid on the side of one end face that contacts one of the end faces of the piece body inside the vortex. A cavitation generating device characterized by the above.

2. A cylindrical body having an inlet, an outlet, and a flow-through hole formed between the inlet and the outlet, through which liquid flows into the flow-through hole from the inlet and outflows from the outlet, and a piece body formed in a columnar shape and having a plurality of groove groups. The piece body It has one end face formed in a substantially planar shape that is substantially orthogonal to the center line of the piece body, the other end face, and an outer peripheral surface disposed between the respective end faces. Each of the groove groups has a groove depth from the outer peripheral surface toward the center line side of the piece body, is open to the outer peripheral surface and the other end face, and is a liquid guide groove formed between the respective end faces. It has a liquid injection groove communicated with the liquid guide groove. Each of the liquid guide grooves has a face width from the outer peripheral surface toward the center line side, is disposed substantially orthogonally to one of the end faces, and is a first groove side face formed between a face end position that is spaced from one of the end faces and the other end face. has a face width from the outer peripheral surface toward the center line side, is disposed substantially orthogonally to one of the end faces, is disposed at a distance from the first groove side face, and is a second groove side face formed between the respective end faces. It has a groove inclined surface disposed between the first groove side face and the second groove side face, forming an angle with one of the end faces, and being inclined while extending from the face end position of the first groove side face to one of the end faces. Each of the liquid injection grooves has a groove bottom surface. It has a groove depth from one of the end faces, and in the direction of the center line of the piece body, is open to the second groove side face between one of the end faces and the face end position with a groove interval at the face end position. In the circumferential direction of the piece body, it is open to one of the end faces at equal intervals between the respective liquid injection grooves. From the outer peripheral surface of the piece body toward the center line, it has a groove width narrower than the face width of the second groove side face and is open to the second groove side face. The groove bottom surface is disposed between the groove side face in the width direction of the liquid injection groove and the outer peripheral surface, forms an angle with one of the end faces, and is inclined while extending from the second groove side face to one of the end faces. The piece body is disposed in the flow-through hole at a distance from the inlet and the outlet, with one of the end faces facing the outlet, and with one of the end faces disposed concentrically with the flow-through hole and substantially orthogonally to the hole center line of the flow-through hole. A plurality of liquid guide channels are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid guide grooves. A plurality of liquid injection channels are formed by the inner peripheral surface of the hole of the flow-through hole and the respective liquid injection grooves. The liquid flowing into the flow-through hole on the inlet side flows into the respective liquid guide channels from the other end face of the piece body. The liquid flowing into the respective liquid guide channels Flowing along the first groove side surface and the second groove side surface toward the groove inclined surface of each liquid guide flow path, colliding with the groove inclined surface of each liquid guide flow path, flowing along the groove inclined surface of each liquid guide flow path, and being ejected into each liquid injection flow path, each of the liquid injection flow paths, inject the liquid ejected from each liquid guide flow path onto the liquid on the inner peripheral surface side of the hole of the circulation hole on one end face side of the piece body, form a vortex around the hole center line of the circulation hole on the inner peripheral surface side of the circulation hole, and generate a negative pressure state in the liquid on one end face side that contacts one end face of the piece body inside the vortex A cavitation generating device characterized by this.

3. The piece body, has a plurality of groove holes, each of the groove holes, is arranged on the other end face side of the piece body in the direction of the center line of the piece body, penetrates the piece body between the liquid guide grooves of each groove group in the circumferential direction of the piece body, and opens into adjacent liquid guide grooves, the liquid guide grooves of each groove group, are communicated through each of the groove holes The cavitation generating device according to claim 1, characterized by this.

4. The piece body, has a plurality of groove holes, each of the groove holes, is arranged on the other end face side of the piece body at intervals from the surface end position in the direction of the center line of the piece body, penetrates the piece body between the liquid guide grooves of each groove group in the circumferential direction of the piece body, and opens into adjacent liquid guide grooves, the liquid guide grooves of each groove group, are communicated through each of the groove holes The cavitation generating device according to claim 2, characterized by this.

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