CN114007729A

CN114007729A - Foam generating device and foam generating method

Info

Publication number: CN114007729A
Application number: CN202080043635.3A
Authority: CN
Inventors: 垰田正二
Original assignee: Futi Scientific Research Co ltd; Fuji Corp
Current assignee: Futi Scientific Research Co ltd; Fuji Corp
Priority date: 2019-09-07
Filing date: 2020-09-07
Publication date: 2022-02-01
Also published as: JP2021040776A; WO2021045231A1; JP6714255B1

Abstract

The invention provides a foam generating apparatus 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 positioned between the inner cylinder and the outer cylinder, wherein the middle cylinder relatively rotates relative to the inner cylinder and the outer cylinder. A foam generation method is adopted, comprising: a first step of mixing water with the foam; a second step of supplying air to the mixed mixture to generate foam; and a third step of thinning the foam by a rotating portion.

Description

Foam generating device and foam generating method

Technical Field

The present invention relates to a foam generating apparatus and a foam generating method. In particular, the present invention relates to a foam generating apparatus and a foam generating method for foaming soapy water or the like.

Background

There is a bubbler in the past (patent document 1). A conventional bubbler will be described with reference to a cross-sectional view of fig. 1. The conventional bubbler is cylindrical. A disc-shaped foam generating portion 4 is disposed inside the cylindrical container 5. The foam generating portion 4 is coupled to the holding portion 3 via a shaft 6. The foam generating portion 4 has a plurality of through holes 7. When the holding part 3 is moved up and down, the foam generating part 4 moves, and foam is generated from the soapy water 8 through the through-hole 7. If foam is generated, the cover 2 is removed and the foam is used.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-

Disclosure of Invention

Problems to be solved by the invention

However, in the case of the conventional bubbler, the density of the foam is low. Accordingly, an object of the present invention is to provide a foam generating apparatus and a foam generating method capable of generating foam with high density.

Means for solving the problems

In order to solve the above problem, the present invention employs a foam generating apparatus including: an inner barrel; an outer cylinder; and a middle cylinder positioned between the inner cylinder and the outer cylinder, the middle cylinder relatively rotating with respect to the inner cylinder and the outer cylinder.

In addition, the present invention employs a foam generating method comprising: a first step of mixing water with the foam; a second step of supplying air to the mixture obtained by the mixing to generate foam; and a third step of thinning the foam by a rotating portion.

Effects of the invention

The bubbler, the foam generating apparatus, and the foam generating method according to the present invention can generate a high-density foam.

Drawings

Fig. 1 is a sectional view of a conventional bubbler.

Fig. 2 (a) is a cross-sectional view of the foam generating apparatus according to embodiment 1, and (b) is a plan view of the foam generating apparatus according to embodiment 1.

Fig. 3 (a) is a bottom view of the first rotating part of the bubbler according to embodiment 1, and (b) is a side view of the first rotating part of the bubbler according to embodiment 1.

Fig. 4 (a) is a plan view of the second rotating portion of the bubbler according to embodiment 1, and (b) is a partial side view of the second rotating portion of the bubbler according to embodiment 1.

Fig. 5 (a) to (c) are plan views of the foam generating section of the bubbler according to embodiment 1.

Fig. 6 is a side view of the foam generating apparatus of embodiment 2.

Fig. 7 (a) to (c) are enlarged cross-sectional views of the mixing section and the periphery of the foam generating section of the foam generating apparatus according to embodiment 2, which illustrate the initial steps.

Fig. 8 (a) to (c) are enlarged cross-sectional views of the mixing section and the periphery of the foam generating section of the foam generating apparatus according to embodiment 2, which illustrate the final step.

Fig. 9 is a sectional view of a rotating portion of a foam generating apparatus according to embodiment 2.

Fig. 10 (a) is a perspective view of the inner tube according to embodiment 2, and (b) is a plan view of the base according to embodiment 2.

Fig. 11 is a perspective view of the back side of the base in embodiment 2.

Fig. 12 is a perspective view of the inner tube of embodiment 2.

Fig. 13 (a) to (b) are perspective views of the inner tube 34 according to embodiment 2, and (c) is a view showing the inside of the rotating portion according to a modification of the inner tube 34 according to embodiment 2.

Fig. 14 is a sectional view of a foam generating apparatus according to embodiment 3.

Fig. 15 is a sectional view of a circulation system part of the foam generating apparatus according to embodiment 3.

Detailed Description

The following description will be given using embodiments, but the invention is not limited to the following.

(embodiment mode 1)

< Structure >

A foam generating apparatus 17a according to embodiment 1 will be described with reference to a cross-sectional view in fig. 2 (a) and a plan view in fig. 2 (b). The foam generating device 17a includes a container 15, a rotating unit 30, and a driving unit 13.

< rotating part 30>

The rotating portion 30 includes a first rotating portion 11, a foam generating portion 14, a second rotating portion 12, and a rotating shaft 16, and the rotating shaft 16 connects the first rotating portion 11, the foam generating portion 14, the second rotating portion 12, and the driving portion 13.

The first rotating unit 11 rotates to blow up the soapy water 20 upward, thereby producing a first foam 21.

The foam generating portion 14 is a thin plate having through holes. The second foam 22 is generated by passing the first foam 21 through the through-holes. Instead of the through-hole, a slit may be provided. As long as there is a gap.

The second rotating part 12 does not move the second foam 22 upward. The second foam 22 is pressed downward. The second froth 22 having advanced downward passes through the first rotating portion 11 again to become the first froth 21. This process is repeated to produce a dense foam.

The rotary shaft 16 connects the first rotary part 11, the bubble generating part 14, the second rotary part 12, and the driving part 13. Integrally forming the rotating portion 30. The rotary shaft 16 is a central shaft when the rotary part 30 rotates. In this example, the first rotating portion 11 is covered with the foam generating portion 14.

< Container 15>

Soapy water 20 is placed in the container 15. The container 15 is cylindrical. Inside the container 15, the rotating portion 30 rotates to generate bubbles.

< drive section 13>

The driving unit 13 is a driving unit that rotates the rotary shaft 16 of the rotating unit 30. The drive portion 13 can be rotated manually. Alternatively, the driving unit 13 may be rotated by a motor or the like.

< Process >

(1) Soapy water 20 is placed into the container 15.

(2) The rotating part 30 is put into the container 15.

(3) The drive unit 13 rotates the rotation unit 30 to blow up the soapy water 20 upward, thereby generating the first foam 21.

(4) When the first foam 21 passes through the gaps such as the through-holes and slits of the foam generating portion 14, the second foam 22 is generated. If the bubbles increase, the bubbles reach the second rotating portion 12. At this time, the second rotating portion 12 does not move the second foam 22 upward. The second foam 22 returns to the soapy water 20 in the lower portion of the container 15.

(5) By repeating the above process again, a foam having a high density in a minute state is produced.

< first rotating part 11>

The first rotating portion 11 of embodiment 1 will be described with reference to a bottom view of fig. 3 (a) and a partial side view of fig. 3 (b).

The first rotating portion 11 has a plurality of blades 11a around the rotating shaft 16. The blades 11a are inclined with respect to the vertical direction. By the rotation, the soapy water 20 located at the lower portion is blown upward, and the first foam 21 is generated.

< second rotating part 12>

The second rotating portion 12 of embodiment 1 will be described with reference to a plan view of fig. 4 (a) and a partial side view of fig. 4 (b).

The second rotating portion 12 has a plurality of blades 12a around the rotating shaft 16. The blades 12a are inclined with respect to the horizontal direction. The second foam 22 rising to the upper portion is pressed downward by the rotation.

< foam forming section 14>

Fig. 5 (a) to 5 (c) are plan views illustrating a part of the foam generating portion 14.

Fig. 5 (a) shows the foam generating part 14 as a mesh. Fig. 5 (b) shows the foam generating portion 14 having a circular opening 14a in a flat plate. Fig. 5 (c) shows that the foam generating portion 14 has a slit-like opening 14a in the flat plate.

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

Further, it is preferable that the bubble generating portion 14 substantially surrounds a space between the periphery of the first rotating portion 11 and the rotating shaft 16. And need not be completely enclosed.

< soapy Water 20>

The soapy water 20 is soapy water, a surfactant, or the like. Any aqueous solution that foams can be used.

< vessel 15 and rotating part 30>

The rotating portion 30 changes its position with respect to the container 15 by rotation or the like, and generates foam. In particular, the rotating portion 30 can move and rotate in the vertical direction with respect to the container 15, and generate the foam.

< first gap 18a and second gap 18b >

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

The second rotary portion 12 presses the second foam 22. The second gap 18b is narrow. The first rotating portion 11 has the first gap 18a large to some extent in order to generate the first bubble 21. At least the first gap 18a is larger than the second gap 18 b.

< shaft tip 19>

As for the front end of the rotation shaft 16, a shaft front end 19 protrudes downward from the first rotation portion 11. The shaft tip 19 contacts the bottom surface of the container 15, and the rotating portion 30 is rotatable. However, the shaft tip 19 may be lifted from the bottom surface of the container 15 to rotate the rotating portion 30.

< effects >

(1) The foam can be generated more efficiently by the rotational movement.

(2) The second rotating portion 12 returns the bubble, thereby generating a high-density fine bubble.

The foam can be efficiently and easily produced at a high density as compared with a conventional bubbler. Therefore, the present invention can be used in beauty rooms, beauty salons, and the like, in addition to general households.

(embodiment mode 2)

< Structure >

The foam generating apparatus 17b according to embodiment 2 will be described with reference to fig. 6. Fig. 6 is a sectional view of the foam generating means 17 b. The foam generating device 17b includes a main body 52, a rotating portion 51, and a driving portion 31.

The main body 52 supplies water, foam, air, and the like to the rotation portion 51. Also has a control section. The control unit may be located in another place.

The rotating portion 51 has a rotating body, and produces foam from water, foam, and air.

The driving unit 31 is a power source for rotating the rotating body of the rotating unit 51.

< rotating part 51>

The rotating portion 51 includes the outer cylinder 33, the inner cylinder 35, and the intermediate cylinder 34. The middle tube 34 rotates between the outer tube 33 and the inner tube 35, thereby generating foam.

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

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

The intermediate cylinder 34 is positioned between the outer cylinder 33 and the inner cylinder 35, and has a cylindrical shape.

The intermediate cylinder 34 may rotate relative to the inner cylinder 35 and the outer cylinder 33.

(middle tube 34)

The outer tube 33 and the inner tube 34 are simple cylindrical shapes. On the other hand, the inner tube 34 has a double-layered cylindrical shape. The double-layered cylindrical shape has an inner side 34b and an outer side 34a, and is joined to one surface of a bottom surface 34 c. The other surface has a lower side 34 d. The lower side 34d is a shape extending the inner side 34 b. The shaft 47 penetrates the center of the bottom surface 34c and is connected to the bottom surface 34 c. The driving unit 31 rotates the shaft 47.

(mixing section 46)

A mixing section 46 is provided between the lower sides 34d, and water and a foam material are supplied through a pipe 45 c. The mixing section 46 has a lower side 34d, and water is mixed with the foam material by rotation of the lower side 34 d.

(Outlet 32)

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 apparatus.

(foam generating section 39)

The foam generating portion 39 is located at a lower portion of the inner tube 35. The foam generating portion 39 has a porous portion 40 for supplying air. Air is supplied from the air supply portion 55 of the main body 52 via the pipe 45 d. Further, a mixture of water and soap is supplied from the pipe 45c, and is mixed with air from the porous portion 40, thereby generating foam.

(liquid reservoir 48)

The liquid reservoir 48 is located on the upper surface of the foam generating portion 39. The reservoir 48 stores water as well as foam. The reservoir 48 has a shaft 47, and water is mixed with the foam by rotation of the shaft 47.

The liquid reservoir 48 is located in the base 42, and the bubble generating portion 39 is located in the base support portion 42a that supports the base 42. The base 42 supports the outer cylinder 33 and the like.

< drive part 31>

The driving unit 31 is located above the rotating unit 51. The driving unit 31 rotates the shaft 47 by a motor or the like. The shaft 47 is coupled to the intermediate cylinder 34, and therefore the intermediate cylinder 34 rotates. The outer cylinder 33 and the inner cylinder 35 are fixed.

< body 52>

The foam generating portion 39 is located in the main body 52 of the lower portion of the inner cylinder 35. The foam generating portion 39 has a porous portion 40 for supplying air. Air is supplied from the air supply portion 55 through the pipe 45 d. Further, a mixture of water and soap is supplied from the pipe 45c, and is mixed with air from the porous portion 40, thereby generating foam. The air supply unit 55 is an air pump or the like.

The reservoir 48 is located on the upper surface of the main body 52 of the foam generating section 39. The reservoir 48 stores water as well as foam. The reservoir 48 has a shaft 47, and water is mixed with the foam by rotation of the shaft 47.

The water supply unit 37 is a pump or the like for supplying water. Connected to a tap water pipe and a container, and water is supplied to the pipe 45 b. It is preferable to be able to control the amount of water supplied.

The material supply unit 36 supplies the foam powder as paste or the like. For example, the material supply unit 36 is connected to a pipe containing the foam paste, and supplies the paste to the pipe 45 a. The amount of paste to be transferred can be preferably adjusted.

The tube 45c is a tube connected to the tube 45a and the tube 45 b. The pipe 45c is connected to the mixing section 46.

The overall control is preferably controlled by the control unit 54. However, each of the supply unit and the drive unit 31 may have a control unit. The degree of foaming (properties, mass, density, etc.) can be controlled by adjusting the amount of water, foam, air supplied, the rotational speed of the intermediate tube 34, etc.

< Process >

The middle tube 34 is rotated by the driving unit 31, and water and the foam are supplied from the material supply unit 36 and the water supply unit 37. Further, air is supplied from the air supply portion 55. The outer cylinder 33 and the inner cylinder 35 are fixed.

< Process I >: initial stage

The initial steps will be described with reference to fig. 7 (a) to 7 (c). Fig. 7 (a) to 7 (c) are enlarged sectional views of the periphery of the mixing section 46 and the foam generating section 39.

(1) FIG. 7 (a)

Water and the foam are supplied from the pipe 45c to the mixing section 46. Water and foam are stored in reservoir 48. The shaft 47 rotates, thus mixing the water with the foam material.

(2) FIG. 7 (b)

Further, the water and the foam are transported, and the water and the foam overflow from the reservoir 48. The mixing section 46 is filled with water and foam. As the underside 34d also rotates, the water is further mixed with the foam material.

(3) Of FIG. 7 (c)

The water and the foam material go to the foam generating portion 39 via the opening 38.

In the foam generating portion 39, air is supplied from the porous portion 40. Foam 49 is generated.

Thereafter, the process proceeds to step 2.

< step 2 >: end stage

The final step will be described with reference to fig. 8 (a) to 8 (c). Fig. 8 (a) to 8 (c) are sectional views of the peripheries of the inner tube 35, the intermediate tube 34, and the outer tube 33.

(4) FIG. 8 (a)

The foam 49 fills the space between the outer cylinder 33 and the outer side 34a of the middle cylinder 34 from the foam generating portion 39 through the opening 38. As the outer side 34a rotates, the foam 49 becomes finer foam.

(5) FIG. 8 (b)

Foam 49 fills the space between the outer side 34a and the inner barrel 35 beyond the outer side 34 a. As the outer side 34a rotates, the foam 49 is further attenuated.

(6) Of FIG. 8 (c)

The foam 49 fills the inner cylinder 35 via the lower portion of the inner cylinder 35. The inner side 34b of the middle tube 34 is located at the inner tube 35. As the inner side 34b rotates, the foam 49 is further tapered.

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

< projection 41>

Fig. 9 shows a cross-sectional view of the rotating portion 51. Fig. 10 (a) shows a perspective view of the inner tube 34, and fig. 10 (b) shows a plan view of the base 42.

It is preferable to have a protrusion 41 on the middle tube 34. The foam becomes finer and denser. In fig. 9, the protrusions 41 are provided on both sides of the outer side 34 a. The triangular columnar projection 41 is provided in the expanding direction with respect to the rotating direction. It is preferable that the protrusion 41 is provided at any position inside the rotating portion 51, without being limited to the inner tube 34. The protrusion 41 is preferably triangular prism-shaped, and may be triangular pyramid-shaped, dot-shaped, quadrangular prism-shaped, or polygonal.

The shaft 47 has irregularities on its periphery, and the opposed liquid reservoir 48 also has irregularities on its inner surface. By rotation of the shaft 47, the water is mixed with the foam material in the reservoir 48.

Fig. 11 shows a perspective view of the rear surface side of the base 42, the outer cylinder 33, and the base support portion 42 a. The air supply port 40a and the foam material supply port 45e are connected to the pipe 45d, and the foam material supply port 45e is connected to the pipe 45 c. The foam generating portion 39 is located inside.

Fig. 12 is a perspective view of the inner tube 34 as an example of the object. The protrusion 41 is in the shape of a thin plate or sheet and formed in a spiral shape. With the projection 41, foam can be prevented from remaining inside the rotating portion 51. That is, if the middle tube 34 rotates, the foam moves upward by the protrusion 41. The foam is advanced. The protrusions 41 are sequentially wound around the middle tube 34 in the longitudinal direction of the middle tube 34.

The protrusion 41 is not limited to being located on the inner tube 34, and may be located on the surfaces of the inner tube 34 and the outer tube 33 facing the inner tube 34. A spiral is provided in the direction of movement of the advancing foam.

Fig. 13 shows a modification of the projection 41. Fig. 13 (a) and 13 (b) are perspective views of the inner tube 34. In fig. 13 (a), the protrusion 41 is provided up to the front end. The front end has a foam generating portion 39 inside. In fig. 13 (b), the projection 41 includes a first projection 41a and a second projection 41 b. The direction of the protrusions of the first protrusion 41a and the second protrusion 41b is different by about 90 degrees. The first projection 41a moves the foam upward, and the second projection 41b moves the foam horizontally, thereby stirring the foam.

The first protrusion 41a moves the foam upward and forcibly moves the foam. The second projections 41b move the foam in the horizontal direction, and further agitate the foam to make the foam have a high density. As a result, a high-density foam can be produced without stagnation.

As shown in fig. 13 (c), the inner tube 35 and the intermediate tube 34 may be formed as a single block as shown in fig. 13 (a) and 13 (b). The items not described are the same as those described above. The foam generated in the lower portion is densified between the outer tube 33 and the side surface of the intermediate tube 34, which is a block, by the protrusions 34. Then, the foam rises and advances due to the growth of the foam, and exits from the outlet portion 32a to the outside. As described above, a high-density foam can be easily produced without making a multi-layer tube.

The first projection 41a and the second projection 41b are flat or plate-like and perpendicular to the inner tube 34. The second projection 41b is inclined with respect to the longitudinal direction of the inner tube 34. Not only has the function of stirring the foam, but also has the function of moving the foam upwards.

In the case of fig. 13, the outer side 34a is extended to the outside of the mixing section 46.

< effects of embodiment 2>

(a) The rotation speed of air, foam, water and the middle cylinder 34 can be adjusted, and the nature and density of the foam can be adjusted. Thereafter, the rotating portion 51 can further reduce the foam to a finer and higher density.

(b) Since the foam is generated by air after mixing water and the foam material in the mixing portion 46 and the reservoir portion 48, the foam can be easily generated in a homogeneous state and at a high density.

(c) Along the long path between the outer cylinder 33, the middle cylinder 34, and the inner cylinder 35, a high density foam is generated. The high-density foam is a foam that can support a coin even when the coin is placed on the foam. The foam did not disappear even when the foam was held by hand.

(d) The rotating portion 51 is compact, and has the driving portion 31 thereon, further compact.

(e) The projections 41 are provided on the outside 34a or the like, whereby foam can be further generated. The foam can be forcibly moved, and a high-density foam can be efficiently produced.

(embodiment mode 3)

< Structure >

A foam generating apparatus 17c according to embodiment 3 will be described with reference to fig. 14. Fig. 14 is a sectional view of the foam generating means 17 c. The foam generating apparatus 17c further includes a circulation system 65 in the foam generating apparatus 17b of embodiment 2. The items not described are the same as those in the foam generating apparatus 17b of embodiment 2.

The circulation system 65 further includes a receiving unit 62, a moving unit 63, and a returning unit 61.

The receiving portion 62 is a portion that receives the foam from the outlet portion 32 a. Is in an inverted cone shape and is used for receiving foam.

The returning section 61 is a passage for returning the foam received by the receiving section 62 from the outer cylinder 33 to the main body (inside the outer cylinder 33).

The moving unit 63 is a mechanism for moving the foam toward the main body in the returning unit 61. For example, a screw shown in fig. 13 is used as the first screw 56 a. By the rotation, the foam is forcibly moved.

Foam is produced in the foam producing device 17c, a part of the foam is used above the receiving portion 62, and the remaining foam is returned to the main body again. The foam can be circulated while the quality of the foam is ensured.

Further, the receiving portion 62 receives the foam, but the density of the foam is high, and the foam is hard to move to the returning portion 61 only by its own weight. Therefore, as shown in fig. 15, the foam is preferably forcibly conveyed to the return portion 61 by the second screw 56 b. The second screw 56b is a mechanism in which the plurality of blades rotate to move the foam in the direction of the moving portion 63.

The first screw 56a and the second screw 56b may not be screws, and may be other moving mechanisms if the mechanism for advancing the movement of the foam is used.

(supplement)

The above embodiments may also be combined.

Industrial applicability

The foam generating apparatus and method of the present invention can be used in general households, beauty rooms, beauty salons, and the like.

Description of reference numerals:

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

Claims

1. A foam-generating device, characterized in that,

the foam generating device includes:

a first cartridge;

a third cartridge; and

a second cartridge positioned between the first cartridge and the third cartridge,

the second cartridge relatively rotates with respect to the first cartridge and the third cartridge,

the foam is made fine between the first tube and the second tube and between the second tube and the third tube.

2. Foam generating device according to claim 1,

a mixing portion for mixing water with the foam is located at a lower portion of the second cylinder.

3. Foam generating device according to claim 2,

the lower part of the mixing part is provided with a foam generating part which is supplied with air to generate foam.

4. Foam generating device according to claim 3,

an opening is provided between the mixing section and the foam generating section, and a mixture of water and a foam material is supplied from the mixing section to the foam generating section.

5. Foam generating device according to any of the claims 1 to 4,

the first cylinder has a driving portion at an upper portion thereof, and the driving portion relatively rotates the second cylinder with respect to the first cylinder and the third cylinder.

6. Foam generating device according to claim 4,

the foam generating apparatus further has: a water supply unit for supplying the water; a foam material supply unit that supplies the foam material; and an air supply unit for supplying the air.

7. Foam generating device according to any of the claims 1 to 6,

there is a protrusion on the second or third barrel.

8. A foam-generating device, characterized in that,

the foam generating device includes:

a first cartridge;

a third cartridge; and

having an outlet section connected to the first cartridge, having a receiving section for receiving foam from the outlet section, the receiving section being connected to the third cartridge by a return section.

9. Foam generating device according to any of the claims 1 to 8,

the first and third cartridges are fixed.

10. A method for producing foam, characterized in that,

the foam generation method comprises the following steps:

a first step of mixing water with the foam;

a second step of supplying air to the mixture obtained by the mixing to generate foam; and

a third step of attenuating the foam by rotation of the foam generator according to any one of claims 1 to 9.