Foam generating device and foam generating method

Abstract

The present invention provides a foam generating device and a foam generating method, which can generate high-density foam. The foam generating device comprises an inner cylinder, an outer cylinder and a middle cylinder located between the inner cylinder and the outer cylinder, and the middle cylinder rotates relative to the inner cylinder and the outer cylinder. The foam generating method comprises: a first step of mixing water and a foam material; a second step of supplying air to the mixed mixture to generate foam; and a third step of thinning the foam by a rotating part.

Description

Technical Field

[0001] The present invention relates to a foam generating device and a foam generating method, and more particularly to a foam generating device and a foam generating method for generating foam from soap water or the like. Background Art

[0002] There is a conventional bubbler (Patent Document 1). Figure 1 The conventional bubbler is described in the cross-sectional view of FIG. The conventional bubbler is cylindrical. A disc-shaped foam generating portion 4 is arranged inside a cylindrical container 5. The foam generating portion 4 is connected to a holding portion 3 via a shaft 6. The foam generating portion 4 has a plurality of through holes 7. When the holding portion 3 is moved up and down, the foam generating portion 4 moves, and foam is generated from soap water 8 through its through holes 7. When foam is generated, the cover 2 is removed and the foam is used.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Publication No. 2015-139545 Summary of the invention

[0006] Problems to be Solved by the Invention

[0007] However, in the case of the conventional foamer, the density of the foam is low. Therefore, an object of the present invention is to provide a foam generating device and a foam generating method capable of generating high-density foam.

[0008] Technical solutions to solve problems

[0009] In order to solve the above-mentioned problem, the present invention adopts a foam generating device including: an inner cylinder; an outer cylinder; and a middle cylinder located between the inner cylinder and the outer cylinder, wherein the middle cylinder rotates relative to the inner cylinder and the outer cylinder.

[0010] In addition, the present invention adopts a foam generating method, comprising: a first step of mixing water and a foam material; a second step of supplying air to the mixed mixture to generate foam; and a third step of thinning the foam by a rotating part.

[0011] Effects of the Invention

[0012] In the foam generator, the foam generating device and the foam generating method of the present invention, high-density foam can be generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of a conventional bubbler.

[0014] Figure 2(a) is a cross-sectional view of the foam generating device of Embodiment 1, and (b) is a plan view of the foam generating device of Embodiment 1.

[0015] Figure 3 (a) is a bottom view of the first rotating part of the bubbler of Embodiment 1, and (b) is a side view of the first rotating part of the bubbler of Embodiment 1.

[0016] Figure 4 (a) is a top view of the second rotating part of the bubbler of Embodiment 1, and (b) is a partial side view of the second rotating part of the bubbler of Embodiment 1.

[0017] Figure 5 (a) to (c) are plan views of the foam generating portion of the bubbler of Embodiment 1.

[0018] Figure 6 It is a side view of the foam generating device of Embodiment 2.

[0019] Figure 7 (a) to (c) are enlarged cross-sectional views of the vicinity of the mixing portion and the foam generating portion of the foam generating device of the second embodiment for explaining the initial steps.

[0020] Figure 8 (a) to (c) are enlarged cross-sectional views of the vicinity of the mixing portion and the foam generating portion of the foam generating device of the second embodiment for explaining the final steps.

[0021] Fig. 9 It is a cross-sectional view of the rotating part of the foam generating device according to the second embodiment.

[0022] Fig.10 (a) is a stereoscopic view of the middle cylinder of Embodiment 2, and (b) is a top view of the base of Embodiment 2.

[0023] Fig.11 This is a perspective view of the back side of the base according to the second embodiment.

[0024] Fig.12 It is a perspective view of the middle tube of Embodiment 2.

[0025] Fig.13 (a) to (b) are perspective views of the middle cylinder 34 of the second embodiment, and (c) is a view showing the interior of a rotating portion of a modified example of the middle cylinder 34 of the second embodiment.

[0026] Fig.14 It is a cross-sectional view of the foam generating device according to the third embodiment.

[0027] Fig.15 It is a cross-sectional view of the circulation system portion of the foam generating device according to the third embodiment. DETAILED DESCRIPTION

[0028] Hereinafter, although description is given using embodiments, the present invention is not limited to the following.

[0029] (Implementation Method 1)

[0030] <Structure>

[0031] use Figure 2 (a) a cross-sectional view and Figure 2 The foam generating device 17 a of Embodiment 1 will be described with reference to the plan view of FIG. 1 . The foam generating device 17 a includes a container 15 , a rotating unit 30 , and a driving unit 13 .

[0032] <Rotating Unit 30>

[0033] The rotating unit 30 includes a first rotating unit 11 , a foam generating unit 14 , a second rotating unit 12 , and a rotating shaft 16 that connects the first rotating unit 11 , the foam generating unit 14 , the second rotating unit 12 , and the driving unit 13 .

[0034] The first rotating part 11 rotates to blow the soapy water 20 upward to produce the first foam 21 .

[0035] The foam generating part 14 is a thin plate having through holes. The second foam 22 is generated by passing the first foam 21 through the through holes. Slits may be used instead of through holes. Any gap is sufficient.

[0036] The second rotating part 12 does not allow the second foam 22 to go upward, but presses the second foam 22 downward. The second foam 22 that has moved downward passes through the first rotating part 11 again and becomes the first foam 21. This process is repeated to generate dense foam.

[0037] The rotating shaft 16 connects the first rotating part 11, the foam generating part 14, the second rotating part 12 and the driving part 13. The whole constitutes the rotating part 30. The rotating shaft 16 is the axis of the center when the rotating part 30 rotates. In this example, the first rotating part 11 is covered by the foam generating part 14.

[0038] <Container 15>

[0039] Soap water 20 is placed in the container 15. The container 15 is cylindrical. Inside the container 15, the rotating unit 30 rotates to generate foam.

[0040] <Driver 13>

[0041] The driving unit 13 is a driving unit that rotates the rotating shaft 16 of the rotating unit 30. The driving unit 13 may be rotated manually. Alternatively, the driving unit 13 may be rotated by a motor or the like.

[0042] <Process>

[0043] (1) Soapy water 20 is placed in the container 15.

[0044] (2) The rotating unit 30 is placed in the container 15 .

[0045] (3) The driving unit 13 rotates the rotating unit 30 to blow the soapy water 20 upward, thereby generating the first foam 21 .

[0046] (4) When the first foam 21 passes through the through hole, slit or other gap of the foam generating unit 14, the second foam 22 is generated. When the foam increases, the foam reaches the second rotating unit 12. At this time, the second foam 22 is prevented from moving upward by the second rotating unit 12. The second foam 22 returns to the soapy water 20 at the bottom of the container 15.

[0047] (5) By repeating the above process, microscopic high-density foam is generated.

[0048] <First Rotating Unit 11>

[0049] use Figure 3 (a) bottom view, Figure 3 The first rotating unit 11 of the first embodiment will be described with reference to the partial side view of FIG.

[0050] The first rotating part 11 has a plurality of blades 11a around the rotating shaft 16. The blades 11a are inclined with respect to the vertical direction. The first rotating part 11 rotates to blow the soapy water 20 located at the bottom upward, thereby generating the first foam 21.

[0051] <Second Rotating Unit 12>

[0052] use Figure 4 (a) a top view, Figure 4 The second rotating unit 12 of the first embodiment will be described with reference to the partial side view of (b).

[0053] The second rotating part 12 has a plurality of blades 12a around the rotating shaft 16. The blades 12a are inclined with respect to the horizontal direction, and the second foam 22 that has risen to the upper part is pressed downward by the rotation.

[0054] <Foam Generating Section 14>

[0055] Figure 5 (a) to Figure 5 (c) is a plan view illustrating a part of the foam generating unit 14 .

[0056] exist Figure 5 In (a), the foam generating portion 14 is shown to be in a mesh shape. Figure 5(b) shows that the foam generating portion 14 has a circular opening 14a in the flat plate. Figure 5 (c) shows that the foam generating portion 14 has a slit-shaped opening 14a in the flat plate.

[0057] The foam generating portion 14 needs at least an opening through which the first foam 21 can pass. The shape thereof is various.

[0058] In addition, it is preferable that the foam generating part 14 substantially surrounds the space between the periphery of the first rotating part 11 and the rotating shaft 16. It is not necessary to completely surround the space.

[0059] <Soapy Water 20>

[0060] The soapy water 20 is soapy water, a surfactant, etc. Any aqueous solution that foams can be used.

[0061] <Container 15 and Rotating Unit 30>

[0062] The rotating part 30 generates foam by changing its position relative to the container 15 by rotation or the like. In particular, the rotating part 30 can move and rotate in the up-down direction relative to the container 15 to generate foam.

[0063] <First Gap 18a and Second Gap 18b>

[0064] A second gap 18 b is provided between the inner surface of the container 15 and the second rotating unit 12 , and a first gap 18 a is provided between the inner surface of the container 15 and the first rotating unit 11 .

[0065] The second rotating part 12 presses the second bubbles 22. The second gap 18b is narrowed. The first rotating part 11 increases the first gap 18a to a certain extent in order to generate the first bubbles 21. At least the first gap 18a is larger than the second gap 18b.

[0066] <Shaft front end 19>

[0067] The front end of the rotating shaft 16 is a shaft front end 19 extending downward from the first rotating part 11. The shaft front end 19 contacts the bottom surface of the container 15, and the rotating part 30 can rotate. However, the shaft front end 19 may be floated from the bottom surface of the container 15 to rotate the rotating part 30.

[0068] <Effect>

[0069] (1) Foam can be generated more efficiently by rotational movement.

[0070] (2) The second rotating unit 12 returns the bubbles, thereby generating high-density fine bubbles.

[0071] Compared with conventional foamers, the foamer can generate high-density foam efficiently and easily, and therefore can be used in beauty salons, beauty salons, and the like in addition to ordinary households.

[0072] (Implementation Method 2)

[0073] <Structure>

[0074] use Figure 6 The foam generating device 17b according to the second embodiment will be described. Figure 6 2 is a cross-sectional view of the foam generating device 17 b . The foam generating device 17 b includes a main body 52 , a rotating unit 51 , and a driving unit 31 .

[0075] The main body 52 supplies water, foam material, air, etc. to the rotating part 51. It also has a control part. In addition, the control part can also be located in other parts.

[0076] The rotating unit 51 has a rotating body and produces foam from water, foam material, and air.

[0077] The driving unit 31 is a power source that rotates the rotating body of the rotating unit 51 .

[0078] <Rotating Unit 51>

[0079] The rotating part 51 has an outer cylinder 33, an inner cylinder 35, and a middle cylinder 34. The middle cylinder 34 rotates between the outer cylinder 33 and the inner cylinder 35, thereby generating foam.

[0080] The outer cylinder 33 is an outer frame facing the outside and has a cylindrical shape.

[0081] The inner cylinder 35 is located at the center and has a cylindrical shape.

[0082] The middle tube 34 is located between the outer tube 33 and the inner tube 35 and has a cylindrical shape.

[0083] In addition, the middle tube 34 only needs to rotate relative to the inner tube 35 and the outer tube 33 .

[0084] (Middle tube 34)

[0085] The outer cylinder 33 and the middle cylinder 34 are simple cylindrical shapes. On the other hand, the middle cylinder 34 is a double-layered cylindrical shape. The double-layered cylindrical shape has an inner side 34b and an outer side 34a, which are respectively connected to one side of the bottom surface 34c. In addition, the other side has a lower side 34d. The lower side 34d is a shape that extends the inner side 34b. The shaft 47 passes through the center of the bottom surface 34c and is connected to the bottom surface 34c. The drive unit 31 rotates the shaft 47.

[0086] (Mixing section 46)

[0087] The lower side 34d has a mixing section 46, and water and foam material are supplied through a pipe 45c. The mixing section 46 has a lower side 34d, and the water and foam material are mixed by rotating the lower side 34d.

[0088] (Exit 32)

[0089] The outlet portion 32 is located at the end of the middle tube 34 and is an outlet for supplying the produced foam to the outside of the device.

[0090] (Foam Generating Unit 39)

[0091] The foam generating part 39 is located at the lower part of the inner cylinder 35. The foam generating part 39 has a porous part 40 for supplying air. Air is supplied from the air supply part 55 of the main body 52 via the tube 45d. In addition, a mixture of water and soap is supplied from the tube 45c and mixed with the air from the porous part 40 to generate foam.

[0092] (liquid storage part 48)

[0093] The liquid storage part 48 is located on the upper surface of the foam generating part 39. The liquid storage part 48 stores water and foam material. The liquid storage part 48 has a shaft 47, and the water and foam material are mixed by the rotation of the shaft 47.

[0094] In addition, the liquid storage part 48 is located on the base 42, and the foam generating part 39 is located in the base supporting part 42a which supports the base 42. The base 42 supports the outer cylinder 33 and the like.

[0095] <Driver 31>

[0096] The driving unit 31 is located above the rotating unit 51. The driving unit 31 rotates the shaft 47 using a motor or the like. The shaft 47 is connected to the middle cylinder 34, so the middle cylinder 34 rotates. The outer cylinder 33 and the inner cylinder 35 are fixed.

[0097] <Main body 52>

[0098] The foam generating part 39 is located in the main body 52 at the lower part of the inner cylinder 35. The foam generating part 39 has a porous part 40 for supplying air. Air is supplied from the air supply part 55 via the tube 45d. In addition, a mixture of water and soap is supplied from the tube 45c and mixed with the air from the porous part 40 to generate foam. The air supply part 55 is an air pump or the like.

[0099] The liquid storage part 48 is located on the upper surface of the main body 52 of the foam generating part 39. The liquid storage part 48 stores water and foam material. The liquid storage part 48 has a shaft 47, and the water and foam material are mixed by the rotation of the shaft 47.

[0100] The water supply unit 37 is a pump or the like for supplying water. It is connected to a water pipe or a container, and supplies water to the pipe 45b. It is preferable that the amount of water supplied can be controlled.

[0101] The material supply unit 36 ​​supplies the foam material powder as a paste or the like. For example, the material supply unit 36 ​​is connected to a pipe in which the foam material paste is placed, and supplies the paste to the pipe 45a. It is preferable that the amount of the paste to be transported can be adjusted.

[0102] The tube 45c is connected to the tube 45a and the tube 45b. The tube 45c is connected to the mixing unit 46.

[0103] The whole is preferably controlled by the control unit 54. However, each supply unit and the drive unit 31 may also have a control unit. By adjusting the supply amount of water, foam material, air, the rotation speed of the middle cylinder 34, etc., the degree of foam (nature, quality, density, etc.) can be controlled.

[0104] <Process>

[0105] The middle cylinder 34 is rotated by the driving unit 31, and water and foam material are supplied from the material supply unit 36 ​​and the water supply unit 37. In addition, air is supplied from the air supply unit 55. The outer cylinder 33 and the inner cylinder 35 are fixed.

[0106] <Process I>: Initial stage

[0107] use Figure 7 (a) to Figure 7 (c) The initial process is described. Figure 7 (a) to Figure 7 (c) is an enlarged cross-sectional view of the mixing portion 46 and the periphery of the foam generating portion 39 .

[0108] (1) Figure 7 (a)

[0109] Water and foam material are sent from the pipe 45c to the mixing part 46. The water and foam material are stored in the liquid storage part 48. The shaft 47 rotates, thereby mixing the water and the foam material.

[0110] (2) Figure 7 (b)

[0111] Furthermore, water and foam material are conveyed, and water and foam material overflow from the liquid storage part 48. The mixing part 46 is filled with water and foam material. Since the lower side 34d also rotates, the water and foam material are further mixed.

[0112] (3) Figure 7 (c)

[0113] The water and the foam material go to the foam generating section 39 via the opening 38 .

[0114] In the bubble generating portion 39, air is supplied from the porous portion 40, and bubbles 49 are generated.

[0115] Afterwards, proceed to step 2.

[0116] <Process 2>: Final stage

[0117] use Figure 8 (a) to Figure 8 (c) The final process is described. Figure 8 (a) to Figure 8 (c) is a cross-sectional view of the periphery of the inner tube 35 , the middle tube 34 , and the outer tube 33 .

[0118] (4) Figure 8 (a)

[0119] The foam 49 is filled from the foam generating portion 39 through the opening 38 between the outer tube 33 and the outer side 34a of the middle tube 34. As the outer side 34a rotates, the foam 49 becomes finer foam.

[0120] (5) Figure 8 (b)

[0121] The foam 49 exceeds the outer side 34a and fills the space between the outer side 34a and the inner tube 35. As the outer side 34a rotates, the foam 49 becomes thinner.

[0122] (6) Figure 8 (c)

[0123] The foam 49 fills the inner tube 35 via the lower portion of the inner tube 35. The inner side 34b of the middle tube 34 is located in the inner tube 35. As the inner side 34b rotates, the foam 49 becomes thinner.

[0124] The foam 49 is supplied to the outside from the outlet portion 32a.

[0125] <Protrusion 41>

[0126] exist Fig. 9 2 shows a cross-sectional view of the rotating portion 51. Fig.10 (a) shows a three-dimensional view of the middle tube 34. Fig.10 (b) shows a top view of the base 42.

[0127] It is preferred to have protrusions 41 on the middle tube 34. The foam becomes finer and more dense. Fig. 9 In the embodiment, the protrusion 41 is provided on both sides of the outer side 34a. The protrusion 41 has a triangular prism shape in the direction of expansion relative to the rotation direction. In addition, it is not limited to the middle cylinder 34, and it is preferred that the protrusion 41 is provided at any position inside the rotating part 51. The protrusion 41 is preferably in a triangular prism shape, and may also be in a triangular pyramid shape, a point shape, a quadrangular prism shape, or a polygonal shape.

[0128] The shaft 47 has projections and depressions on its periphery, and the inner surface of the liquid storage portion 48 facing the shaft 47 also has projections and depressions. As the shaft 47 rotates, water and foam material are mixed in the liquid storage portion 48.

[0129] exist Fig.11 3 shows a perspective view of the back side of the base 42, the outer cylinder 33, and the base support portion 42a. The tube 45d is connected to the air supply port 40a and the foam material supply port 45e, and the tube 45c is connected to the foam material supply port 45e. The foam generating portion 39 is located inside.

[0130] exist Fig.12 3D view of the middle cylinder 34 showing an example of an object. The protrusion 41 is in the shape of a thin plate or a sheet and is formed in a spiral shape. With this protrusion 41, it is possible to prevent the foam from being retained inside the rotating part 51. That is, if the middle cylinder 34 rotates, the foam moves upward through the protrusion 41. The foam is moved forward. In the long side direction of the middle cylinder 34, the protrusion 41 is sequentially wound around the middle cylinder 34.

[0131] The protrusions 41 are not limited to being located in the middle tube 34, and may be located in the middle tube 34 or the surface of the outer tube 33 facing the middle tube 34. The spiral shape is provided in the direction of the movement of the foam.

[0132] exist Fig.13 2 shows a modified example of the protrusion 41. Fig.13 (a) Fig.13 (b) is a three-dimensional view of the middle tube 34. Fig.13 In (a), the protrusion 41 is provided all the way to the front end. The front end has a foam generating portion 39 inside. Fig.13 In (b), the protrusion 41 includes a first protrusion 41a and a second protrusion 41b. The protrusion directions of the first protrusion 41a and the second protrusion 41b are different by about 90 degrees. The first protrusion 41a moves the foam upward, and the second protrusion 41b moves the foam horizontally to stir the foam.

[0133] The first protrusion 41a moves the foam upward and forcibly moves the foam. The second protrusion 41b moves the foam horizontally, further stirs the foam, and makes the foam high-density. As a result, high-density foam can be produced without stagnation.

[0134] In addition, the inner tube 35 and the middle tube 34 may also be Fig.13 As shown in (c), Fig.13 (a) Fig.13The block of (b) is a block. The matters not described are the same as above. The foam generated at the lower part is made high-density between the outer tube 33 and the side of the middle tube 34 that becomes the block through the protrusion 34. And, due to the growth of the foam, the foam rises and moves forward, and comes out from the outlet 32a to the outside. As described above, high-density foam can be easily generated without making a multi-layer tube.

[0135] The first protrusion 41a and the second protrusion 41b are flat or sheet-shaped and are perpendicular to the middle tube 34. The second protrusion 41b is inclined with respect to the long side direction of the middle tube 34. It not only has the function of stirring the foam, but also has the function of moving the foam upward.

[0136] In addition, Fig.13 In the case of , the outer side 34a is extended to the outside of the mixing section 46.

[0137] <Effects of Implementation Method 2>

[0138] (a) The rotation speed of the air, foam material, water, and middle cylinder 34 can be adjusted, and the properties and density of the foam can be adjusted. Then, the foam can be made finer and more dense by the rotating part 51.

[0139] (b) Water and the foaming material are mixed in the mixing section 46 and the liquid storage section 48, and then foam is generated by air. Therefore, uniform and high-density foam can be easily generated.

[0140] (c) High-density foam is generated along the long path between the outer tube 33, the middle tube 34 and the inner tube 35. High-density foam means foam that can hold coins even if they are placed on the foam. It means foam that does not disappear even if you hold the foam with your hands.

[0141] (d) The rotating portion 51 is compact, and the driving portion 31 is provided thereon, making it even more compact.

[0142] (e) The outer side 34a and the like have the protrusions 41, thereby further generating foam. The foam can be forcibly moved, and high-density foam can be efficiently produced.

[0143] (Implementation 3)

[0144] <Structure>

[0145] use Fig.14 The foam generating device 17c according to the third embodiment will be described. Fig.14 17 is a cross-sectional view of the foam generating device 17c. The foam generating device 17c is the same as the foam generating device 17b of the second embodiment and further includes a circulation system 65. The matters not described are the same as those of the foam generating device 17b of the second embodiment.

[0146] The circulation system 65 further includes a receiving portion 62 , a moving portion 63 , and a returning portion 61 .

[0147] The receiving portion 62 is a portion for receiving the foam from the outlet portion 32a. It has an inverted tapered shape and receives the foam.

[0148] The return portion 61 is a passage for returning the foam received by the receiving portion 62 from the outer tube 33 to the main body (inside the outer tube 33).

[0149] The moving part 63 is a mechanism for moving the foam toward the main body in the return part 61. Fig.13 The spiral member shown is set as the first spiral member 56a. By rotating, the foam is forcibly moved.

[0150] The foam is produced in the foam generating device 17c, a part of which is used above the receiving portion 62, and the remaining foam is returned to the main body again. The quality of the foam can be maintained while the foam is circulated.

[0151] Furthermore, the foam is received by the receiving portion 62, but the foam has a high density and is difficult to move to the return portion 61 by its own weight. Fig.15 As shown, it is preferred that the foam is forcibly conveyed to the return portion 61 by the second screw 56b. The second screw 56b is a mechanism that moves the foam in the direction of the moving portion 63 by rotating a plurality of blades.

[0152] In addition, the first screw 56a and the second screw 56b may not be screws, but may be other moving mechanisms as long as they are mechanisms for advancing the movement of foam.

[0153] (Replenish)

[0154] The above-mentioned embodiments may also be combined.

[0155] Industrial Applicability

[0156] The foam generating device and method of the present invention can be used in ordinary households, beauty salons, beauty salons, and the like.

[0157] Description of reference numerals:

[0158] 2: cover; 3: holding part; 4: foam generating part; 5: container; 6: shaft; 7: through hole; 8: soap water; 11: first rotating part; 11a: blade; 12: second rotating part; 12a: blade; 13: driving part; 14: foam generating part; 14a: opening; 15: container; 16: rotating shaft; 17a, 17b, 17c: foam generating device; 18a: first gap; 18b: second gap; 19: shaft front end; 20: soap water; 21: first foam; 22: second foam; 30: rotating part; 31: driving part; 32: outlet; 32a: outlet; 33: outer Cylinder; 34: middle cylinder; 34a: outer side; 34b: inner side; 34c: bottom surface; 34d: lower side; 35: inner cylinder; 36: material supply part; 37: water supply part; 38: opening; 39: foam generating part; 40: porous part; 41: protrusion; 41a: first protrusion; 41b: second protrusion; 42: base; 45a, 45b, 45c, 45d: tube; 45e: foam material supply port; 46: mixing part; 47: shaft; 49: foam; 51: rotating part; 52: main body; 54: control part; 55: air supply part; 56a: first screw; 56b: second screw.

Claims

1. A foam generating device, characterized in that: The foam generating device comprises: First barrel; The third cylinder; A second tube is located between the first tube and the third tube and is in a double-layer cylindrical shape having an inner side and an outer side, wherein the inner side and the outer side are respectively joined to one side of the bottom surface, and the other side of the bottom surface has a lower side, and the lower side is in a shape extending the inner side; and a mixing section, between and including the lower side of the second cylinder, to which water and foam material are supplied, The second cylinder rotates relative to the first cylinder and the third cylinder. The water and the foam material in the mixing part are mixed by the rotation of the lower side of the second cylinder. Between the first tube and the second tube and between the second tube and the third tube, the foam is made into fine foam.

2. The foam generating device according to claim 1, characterized in that: A foam generating section to which air is supplied to generate foam is provided at a lower portion of the mixing section.

3. The foam generating device according to claim 2, characterized in that: An opening is provided between the mixing portion and the foam generating portion, and a mixture of water and a foam material is supplied from the mixing portion to the foam generating portion.

4. The foam generating device according to any one of claims 1 to 3, characterized in that: A driving unit is provided on an upper portion of the first tube, and the driving unit rotates the second tube relative to the first tube and the third tube.

5. The foam generating device according to claim 3, characterized in that: The foam generating device further includes: a water supply unit for supplying the water; a foam material supply unit for supplying the foam material; and an air supply unit for supplying the air.

6. The foam generating device according to any one of claims 1 to 3, characterized in that: A protrusion is provided on the second tube or the third tube.

7. The foam generating device according to any one of claims 1 to 3, characterized in that: The device has an outlet portion connected to the first tube, and a receiving portion for receiving the foam coming out of the outlet portion, wherein the receiving portion is connected to the third tube via a return portion.

8. The foam generating device according to any one of claims 1 to 3, characterized in that: The first tube and the third tube are fixed.

9. A foam generating method using the foam generating device according to any one of claims 1 to 8, characterized in that: The foam generating method comprises: In the first step, water is mixed with the foam material; A second step of supplying air to the mixture obtained by mixing to generate foam; and In a third step, the foam is thinned by rotating the foam generating device according to any one of claims 1 to 8.

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