Microbubble generating device and method for producing microbubbles

Abstract

To provide a portable device capable of generating a large amount of microbubbles from stored water and a method for producing the microbubbles. [Solution] The microbubble generator 1 comprises a container 2 for storing liquid, tubes 34, 35 disposed within the container 2, a lid 3 having an attachment port 21 for attaching the tubes 34, 35, and a discharge port 12 communicating with the attachment port 21 and for discharging the liquid to the outside, and a microbubble generating mechanism 33 attached to the tubes 34, 35 and generating microbubbles. The lid 3 comprises a pump mechanism 9 for pressurizing the inside of the container 2, and an opening / closing mechanism 8 that can open and close a flow path 11 between the attachment port 21 and the discharge port 12. The microbubble generating mechanism 33 comprises a microbubble generator 36 having a shaft 38 with multiple rectangular pillars 39 attached to the side surface, and a housing 37 that houses the microbubble generator 36.

Description

[Technical Field]

[0001] The present invention relates to a microbubble generating device and a method for producing microbubbles. [Background technology]

[0002] In recent years, nanobubble water, which is water containing a large amount of nanobubbles, which are tiny bubbles with a diameter of 1 μm or less, has been attracting attention due to its verified cleansing properties, beauty benefits, and other various effects. Nanobubble water generators have been improved to be smaller, simpler, and easier to install, and devices that can be used at home are now available. Known examples of such generators include a type that is built into a shower head (see Patent Document 1), a type that is attached as a hose connector between the shower head and the hose (see Patent Document 2), and a type that is attached to a kitchen faucet or the like (see Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-11034 [Patent Document 2] Patent No. 6205099 [Patent Document 3] Patent No. 6984919 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the types of devices that are attached to water taps such as faucets and showerheads, as described in Patent Documents 1 to 3, the location where nanobubble water can be obtained is limited to the location where the device is attached, and the installation of a generator to the water tap is also required. Furthermore, the source of nanobubble water is limited to water from the water tap (i.e., tap water), making it difficult to turn commercially available bottled drinking water or lotion, for example, into nanobubble water. Therefore, if there were a portable device that could produce nanobubble water from stored water, such as tap water refilled into a container from the faucet or bottled water, it would be convenient because it would eliminate the hassle of attaching it to a water tap and allow nanobubble water to be easily obtained anywhere and from any source.

[0005] An object of the present invention is to provide a portable device capable of generating a large amount of microbubbles from stored water, and a method for producing microbubbles. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention includes the following inventions.

[0007] The present invention [1] includes a microbubble generating device comprising: a container for storing liquid; a tube disposed within the container; a lid having an attachment port for attaching the tube; and a discharge port communicating with the attachment port and for discharging the liquid to the outside; and a microbubble generating mechanism attached to the tube for generating microbubbles, wherein the lid comprises a pump mechanism for pressurizing the inside of the container and an opening / closing mechanism capable of opening and closing a flow path between the attachment port and the discharge port, and the microbubble generating mechanism comprises a microbubble generator having a plurality of rectangular pillars attached to the side of an axis, and a housing for accommodating the microbubble generator.

[0008] The present invention [2] includes a method for producing microbubbles, which includes, in order, a sealing step of storing a liquid in a container and sealing the inside of the container, a pressurizing step of increasing the internal pressure of the container, and a releasing step of passing the liquid through a tube equipped with a microbubble generating mechanism and then releasing the liquid to the outside of the container.

[0009] The present invention [3] includes the manufacturing method according to [2], further comprising a shaking step of shaking the liquid in the container between the pressurizing step and the releasing step.

[0010] The present invention [4] includes the manufacturing method described in [2] or [3], in which the microbubble generating mechanism comprises a microbubble generator having a plurality of rectangular pillars on the side of the axis, and a housing that houses the microbubble generator.

[0011] The present invention [5] includes the manufacturing method according to any one of [2] to [4], wherein the container is the microbubble generating device according to [1]. [Effects of the Invention]

[0012] The microbubble generator of the present invention can generate a large amount of microbubbles from stored water and is portable. Furthermore, the microbubble manufacturing method of the present invention can generate a large amount of microbubbles from stored water regardless of the location of the water tap. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a plan view of a microbubble generating device according to a first embodiment. [Figure 2] FIG. 2 shows an end view of a cross section taken along line AA in FIG. [Figure 3] 3 shows an enlarged view of the upper part of FIG. 2. [Figure 4] An exploded view of FIG. 1 (excluding the container and the tube with the microbubble generating mechanism) is shown. [Figure 5] An exploded view of Figure 1 (only the container and the tube with the microbubble generating mechanism) is shown. [Figure 6] 2 is a plan view of the lid body and the nozzle of FIG. 1, the upper figure being a plan view, and the lower figure being a cross-sectional end view taken along line BB. [Figure 7] 1A and 1B are diagrams showing the state of the opening / closing mechanism, with the upper diagram showing a cross-sectional end view (hatched) of the opening / closing mechanism in a closed state, and the lower diagram showing a cross-sectional end view (hatched) of the opening / closing mechanism in an open state. [Figure 8] 1 shows a cutaway end view of the pump device when increasing the internal pressure of the container. [Figure 9] An enlarged view of the microbubble generation mechanism in Figure 2 is shown. [Figure 10] FIG. 10 shows a perspective view of the microbubble generator in FIG. 9. [Figure 11] 11 shows a side view of FIG. [Figure 12] A plan view of FIG. 10 is shown. DETAILED DESCRIPTION OF THE INVENTION

[0014] First Embodiment As an example of the present invention, a microbubble generating device (hereinafter abbreviated as "device") 1 according to a first embodiment will be described with reference to Figures 1 to 12. As shown in Figures 1 and 2, the device 1 includes a container 2, a lid 3, and a tube 4 equipped with a microbubble generating mechanism.

[0015] Container 2 contains a liquid such as water. Container 2 may contain, for example, 0.1 L to 10 L. An internal thread 5 is formed on the top of container 2 to screw onto lid 3 and seal the inside of container 2.

[0016] As shown in Figures 3 to 5, the lid 3 is fitted to the container 2 to seal the inside of the device 1 and, in turn, the inside of the container 2. The lid 3 is disposed on top of the container 2. The lid 3 includes a lid main body 6, a nozzle 7, an opening / closing mechanism 8, and a pump mechanism 9.

[0017] As shown in Figure 6, the lid main body 6 has a generally circular shape in plan view. The lid main body 6 has an annular side wall that protrudes downward at its peripheral edge. An external thread 10 that meshes with the internal thread 5 of the container 2 is formed on the inside of the side wall. O-rings 46 are disposed between the lid main body 6 and the container 2, and between the lid main body 6 and the pump mechanism 9, to seal the interior.

[0018] The nozzle 7 is disposed above the lid main body 6 so as to extend linearly from the center outward in a plan view. A flow path 11 through which the liquid in the container 2 passes is formed inside the nozzle 7. One outer end of the flow path 11 forms the discharge port 12, and one inner end of the flow path 11 communicates with the inside of the opening / closing mechanism 8. The diameter of the flow path 11 is larger on the outside than on the inside.

[0019] The opening and closing mechanism 8 opens and closes a flow path 11 inside the lid 3. The opening and closing mechanism 8 is connected to the nozzle 7 and is disposed so as to penetrate the lid main body 6. The opening and closing mechanism 8 includes a push plate 13, a cylindrical portion 14, a shaft portion 15, and an elastic portion 16.

[0020] The push plate 13 is disposed at the top of the opening / closing mechanism 8 and has a generally circular shape in a plan view. The lower surface of the push plate 13 protrudes in a shape that allows it to be fixed to the shaft portion 15.

[0021] The shaft portion 15 is disposed below the push plate 13 and above the elastic portion 16. The shaft portion 15 is formed in a cylindrical shape extending in the vertical direction, and its vertical central portion (expanded diameter portion) 17 has a larger diameter than its upper and lower ends. The expanded diameter portion 17 is disposed opposite the flow path 11. Two O-rings 47 are disposed on the shaft portion 15. Specifically, an O-ring 47a is inserted into the upper end of the expanded diameter portion 17, and an O-ring 47b is inserted around the lower end of the expanded diameter portion 17. The shaft portion 15 is movable in the vertical direction due to the downward pressure of the push plate 13 and the restoring force of the elastic portion 16.

[0022] The elastic part 16 is a member that returns to its original shape when compressed in the vertical direction (particularly from top to bottom), and is, for example, a compression spring. The elastic part 16 is arranged so that its upper part is fixed to the lower side of the shaft part 15 and its lower part is in contact with the upper surface of the tube bottom part 19.

[0023] The tubular portion 14 accommodates the expanded diameter portion 17 and the elastic portion 16 of the shaft portion 15. The tubular portion 14 is composed of an upper tubular portion 18 and a bottom tubular portion 19. The upper tubular portion 18 is integrally formed with the lid body portion 6 and the nozzle 7, and the upper portion of the bottom tubular portion 19 is fitted inside the upper tubular portion 18. The tubular portion 14 is formed to penetrate the lid body portion 6 in the vertical direction and has a generally cylindrical shape. The upper inner diameter (diameter) of the upper tubular portion 18 is slightly smaller than the lower inner diameter (diameter) and slightly larger than the diameter of the expanded diameter portion 17. A small gap 20 (see the upper diagram in Figure 7) is formed between the upper tubular portion 19 and the expanded diameter portion 17 in the horizontal direction (left-right and front-back directions). The gap 20 is defined so as to surround the expanded diameter portion 17. The nozzle 7 is connected to the upper side of the tubular portion 14, and the flow path 11 of the nozzle 7 is connected to the interior (cavity) of the tubular portion 14. An attachment opening 21 is formed at the bottom of the tubular portion 14, i.e., at the center of the tubular bottom portion 19, penetrating the tubular bottom portion 19. The upper end of a second pipe 35 is attached to the attachment opening 21, and the second pipe 35 is inserted through the attachment opening 21. A cylindrical guide 22 is formed on the underside of the tubular bottom portion 19 to guide the second pipe 35 to the attachment opening 21.

[0024] The opening / closing mechanism 8 is normally (not pressed down) in a closed state. Specifically, as shown in the upper diagram of FIG. 7, the restoring force of the elastic portion 16 positions the enlarged diameter portion 17 above the tubular portion 14. Therefore, the O-ring 47b (the cross sections of the O-rings 47a and 47b are hatched in black in FIG. 7) closes the small gap 20 between the enlarged diameter portion 17 and the lower wall of the upper tubular portion 18, preventing water from entering the flow path 11. Meanwhile, by pressing down the push plate 13, the opening / closing mechanism 8 is placed in an open state. Specifically, as shown in the lower diagram of FIG. 7, the elastic portion 16 is compressed, and the enlarged diameter portion 17 moves below the tubular portion 14. This separates the O-ring 47b from the lower wall of the upper tubular portion 18, opening the gap 20, allowing water to enter the flow path 11 through the gap 20. Note that when the pressing down is released, the restoring force of the elastic portion 16 returns the mechanism to the closed state as shown in the upper diagram of FIG. 7.

[0025] The pump mechanism 9 is an air pump, such as a manual pump, that sends air from the outside into the container 2 to increase the internal pressure. The pump mechanism 9 is disposed at a distance from the nozzle 7 and the opening / closing mechanism 8, and is disposed so as to penetrate the lid main body 6. The pump mechanism 9 includes a piston 23, a pump cylinder 24, and a valve 25.

[0026] The piston 23 is composed of a handle 26, a piston shaft 27, and a piston plate 28. The handle 26 is located at the top of the piston 23 and has a flat plate shape. The piston shaft 27 is fixed to the underside of the handle 26 and is a cylindrical shaft extending in the vertical direction. The piston plate 28 is fixed to the lower end of the piston shaft 27 and is a disk member with a diameter approximately the same as the inner diameter of the pump cylinder 24. An inwardly recessed depression is formed around the periphery of the piston plate 28, and an O-ring 48 is disposed (inserted) in this depression.

[0027] The pump barrel 24 accommodates the lower portion of the piston 23, i.e., the piston shaft 27 and the piston plate 28. As shown in the exploded view of FIG. 4, the pump barrel 24 is composed of an outer member 24a, an inner member 24b, and a lower member 24c, which are fitted and fixed to the cover member 6. An annular spacer 29 is disposed inside the pump barrel 24, specifically on the upper surface of the bottom plate of the inner member 24b, so as to contact the peripheral end surface of the pump barrel 24 and to be spaced apart from the valve 25. The spacer 29 prevents the piston plate 28 from contacting the valve 25 when the piston 23 is moved. The bottom plate of the inner member 24b of the pump barrel 24 is also formed with a plurality of air blowing through-holes 30, which are passageways for air from the outside, and one fixing through-hole 31, which fixes the valve 25.

[0028] Valve 25 is fixed to the bottom surface of pump barrel 24 so as to penetrate the bottom surface. That is, a protrusion 32, which is a part of valve 25, protrudes outside (below) pump barrel 24, and the other part of valve 25 is disposed inside pump barrel 24. Protrusion 32 has a disk shape whose diameter decreases downward. Valve 25 is made of a flexible elastic material such as rubber.

[0029] In pump mechanism 9, when piston 23 is stopped, protrusion 32 completely blocks air-blowing through-hole 30. When piston 23 is moved from the upper side to the lower side, the air inside piston 23 is compressed by the pressure of piston plate 28, and the compressed air bends and deforms the peripheral end of protrusion 32 of valve 25 downward (see FIG. 8), opening air-blowing through-hole 30. As a result, air is sent into container 2, and the internal pressure of container 2 increases.

[0030] The tube 4 with a microbubble generation mechanism is a member in which a microbubble generation mechanism 33 is provided midway along the tube. That is, a first tube 34, a microbubble generation mechanism 33, and a second tube 35 are connected in this order.

[0031] The first tube 34 is disposed in the lower portion of the tube 4 with a microbubble generation mechanism. The first tube 34 is, for example, a flexible tube. The upper end of the first tube 34 is inserted into the through-hole 44 of the housing 37 and connected to the microbubble generator 36, and the lower end is an open free end. The liquid contained in the container 2 is sucked from this lower end and guided to the microbubble generation mechanism 33.

[0032] The microbubble generation mechanism 33 generates a large amount of nanobubbles in the liquid flowing from the first pipe 33. As shown in Fig. 9, the microbubble generation mechanism 33 includes a microbubble generator 36 having a cylindrical axis (shaft) 38 on the side surface of which a plurality of rectangular pillars 39 are provided, and a housing 37 that houses the generator.

[0033] As shown in FIG. 10, the microbubble generator 36 integrally comprises a cylindrical shaft 38 and a plurality of square pillars 39.

[0034] The cylindrical shaft 38 supports a plurality of rectangular pillars 39 and extends in the vertical direction.

[0035] The multiple prismatic columns 39 are formed so as to protrude radially outward from the circumferential side surface of the cylindrical shaft 38. The multiple prismatic columns 39 are identical in shape to one another and are substantially parallelepipeds. That is, the prismatic columns 39 are quadrangular columns having a substantially parallelogram shape in side view (when viewed from the radially outer side toward the radially inner side). In a cross-sectional view perpendicular to the up-down direction, they have a rectangular shape that is elongated in the radial direction, and are formed so that the rectangular shape rotates in the circumferential direction of the cylindrical shaft 38 (specifically, counterclockwise) as it goes downward. The outer peripheral edge of the prismatic columns 39 is curved so as to be convex radially outward in plan view. That is, the radially outer surface of the prismatic columns 39 (the surface forming the parallelogram shape) is formed in an arc shape.

[0036] A plurality (30) of rectangular pillars 39 are provided on the circumferential side surface of the cylindrical shaft 38, and are regularly arranged from the upper end to the lower end of the cylindrical shaft 38. Specifically, a plurality (five) of rectangular pillars protruding radially from the cylindrical shaft 38 constitute a set of radial rectangular pillar groups 40, and a plurality (six sets) of radial rectangular pillar groups 40 are arranged at intervals in the vertical direction. The plurality of sets of radial rectangular pillar groups 40 are arranged at equal intervals in the vertical direction and so as to rotate in the circumferential direction (i.e., in a spiral). That is, the plurality of rectangular pillars 39 are arranged on the side surface of the cylindrical shaft 38 so as to follow a spiral line Y whose spiral axis X is the axial direction of the cylindrical shaft 38 (particularly, an axial straight line passing through the center of the cylindrical shaft 38). As shown in FIGS. 11 and 12, the plurality of rectangular pillars 39 are arranged in a spiral shape with a gentle spiral angle θ (for example, 5 degrees or more and 45 degrees or less). In terms of the positional relationship between two adjacent rectangular pillars 39 spaced apart in the axial direction, one rectangular pillar 39 and the other rectangular pillar 39 overlap each other in a plan view and are slightly offset in the circumferential direction. That is, the other rectangular pillar 39 located on the other axial side is slightly offset counterclockwise relative to the one rectangular pillar 39 located on one axial side. There are multiple sets of such spirally arranged rectangular pillar groups. That is, in a side view, multiple (six) axially adjacent rectangular pillars 39 form a single row of spiral rectangular pillar groups 41, and the spiral rectangular pillar groups 41 are arranged in multiple rows (five rows) at equal intervals in the circumferential direction. As a result, while a large number of rectangular pillars 39 are arranged, multiple (five) spiral liquid paths are defined between the spiral rectangular pillar groups 41.

[0037] The vertical length L of the microbubble generator 36 is, for example, 10 mm or more, preferably 20 mm or more, and, for example, 100 mm or less, preferably 50 mm or less. The diameter length W is, for example, 5 mm or more, preferably 10 mm or more, and, for example, 50 mm or less, preferably 30 mm or less.

[0038] The housing 37 houses the microbubble generator 36. The housing 36 has an upper housing 42 and a lower housing 43, which are joined together. Through holes 44 that serve as flow paths are formed in the upper and lower surfaces of the housing 36, and cylindrical guides 45 are formed for connecting the first tube 34 and the second tube 35 to these through holes 44. An O-ring 49 is disposed between the upper housing 42 and the lower housing 43 to fill the gap between them.

[0039] The second pipe 35 is disposed in the upper portion of the microbubble generating pipe 4. The second pipe 35 is, for example, a flexible tube. The upper end of the second pipe 35 is inserted into the mounting opening 21 of the cylindrical portion 14 to be connected (communicated) with the mounting opening 21, and the lower end of the second pipe 35 is inserted into the through-hole 44 of the housing 37 to be connected to the microbubble generator 36.

[0040] The container 2, the lid 3, and the tube with a microbubble generating mechanism 4 may each be made of a resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), ethylene vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyacetal (POM), silicone rubber, or ABS resin; a metal such as aluminum, stainless steel, or brass; or wood.

[0041] 2. Microbubble manufacturing method An example of a method for producing microbubbles (and thus a method for producing microbubble water) of the first embodiment includes, in order, a sealing step, a pressurizing step, a shaking step, and a releasing step using the device 1 of the first embodiment described above. These steps will be described below.

[0042] In the sealing step, a liquid such as water is placed in the container 2 of the device 1, and the container 2 is sealed. Specifically, the lid 3 of the device 1 is removed, the liquid is poured into the container 2, and the container 2 and the lid 3 are then tightly closed. The liquid is preferably water. The water may be tap water, groundwater, seawater, hot water, cold water, mineral water, or the like. Furthermore, as in lotions and the like, desired additives may be dissolved or dispersed in the water to impart desired functions to the water, as long as they do not impair the effects of the present application.

[0043] In the pressurization step, the internal pressure of the container 2 is increased. Specifically, the piston 23 of the pump mechanism 9 is manually moved up and down. This opens the valve 25, and external air is sent into the container 2 through the air supply through-hole 30. The internal pressure of the container 2 may be set within a manually adjustable range, for example, 0.1 MPa or more, preferably 0.2 MPa or more, and for example, 15 MPa or less, preferably 10 MPa or less. This causes the liquid in the container 2 to contain a large number of air bubbles.

[0044] In the shaking step, the liquid inside the container 2 is shaken. That is, the device 1 is manually shaken up and down and / or left and right. For example, the vibration frequency may be about 1 Hz to 10 Hz, and the amplitude may be about 50 mm to 500 mm on average. By performing this shaking step, the amount of nanobubbles, which are minute bubbles, generated can be significantly increased.

[0045] In the discharging step, the liquid is passed through the tube 4 equipped with a microbubble generating mechanism and then discharged to the outside of the container 2. Specifically, the pusher plate 13 is pushed downward. This opens the opening / closing mechanism 8. That is, the gap 20 that blocked one inner end of the flow path 11 of the discharge port 12 opens, opening a series of liquid passages from the discharge port 12 to the first tube 34. As a result, the internal pressure within the container 2 causes the liquid to be forcefully discharged from the discharge port 12 to the outside via the second tube 35, the microbubble generating mechanism 33, the first tube 34, the opening / closing mechanism 8, and the nozzle 7. At this time, the bubbles in the liquid are broken down by the microbubble generating mechanism 33, generating a large amount of nanobubbles in the liquid, and the nanobubble-containing liquid is discharged to the outside. When the pressure on the pusher plate 13 is released, the restoring force of the elastic body 16 causes the opening / closing mechanism to return to the closed state, and the discharge of the liquid stops.

[0046] According to the microbubble manufacturing method using the device 1, a large amount of nanobubbles (microbubbles with a diameter of 1000 nm or less) can be generated in a desired liquid. Specifically, bubbles with a diameter of 500 nm or less can be generated in water at a rate of 100 million / mL or more (preferably 500 million / mL or more, more preferably 700 million / mL or more, and preferably 2 billion / mL or less). In particular, liquids such as tap water and stored water (e.g., drinking water or lotion stored in a container) can be made into nanobubble water. Furthermore, since the device 1 is portable, nanobubble water can be obtained anywhere. Note that this embodiment is believed to operate based on the following mechanism, but is not limited to this mechanism. The pressurization step causes an appropriate amount of air (air bubbles) to enter the water (stored water) inside the container 2. The shaking step further increases the air contained in this liquid. Then, the release step causes the pressurized water to collide with the multiple rectangular pillars 39 of the microbubble generator 36 in multiple stages with great force. At this time, because the rectangular pillars 39 are arranged in a spiral and are surrounded by the bottomed cylinder 3, the liquid moves upward more smoothly in a vortex shape and comes into contact with the rectangular pillars 39 with force. This causes the air bubbles in the water to be broken down into a large number of nanobubbles, which are then released together with the water from the discharge port 12. If the pressurization step is not performed, the water inside the container 2 does not contain a sufficient amount of air bubbles that are the source of nanobubble generation, making it difficult to generate a large amount of nanobubbles.

[0047] <Other embodiments> Although not shown, in the tube with a microbubble generation mechanism 4, the microbubble generation mechanism 33 may be disposed at either end (upper end or lower end) of the tube with a microbubble generation mechanism 4. That is, the second tube 35 may be made longer without the first tube 34, or the first tube 34 may be made longer without the second tube 35.

[0048] Although not shown, the device 1 may be provided with other accessories. For example, an L-shaped pipe that bends downward may be attached to the tip of the nozzle 7. This allows the nanobubble water discharged from the device 1 to be easily transferred to another container. In this case, the tip of the nozzle 7 may be provided with an external thread or the like for ease of attachment.

[0049] Although not shown, the method for producing microbubbles does not necessarily have to include a shaking step, but it is preferable to include a shaking step in order to generate a larger number of nanobubbles. [Example]

[0050] The present invention will be described in detail below with reference to examples and comparative examples, but the scope of the present invention is not limited thereto.

[0051] Example 1 The generating device shown in Figures 1 to 12 was produced as Example 1. The microbubble generator 36 had a vertical length L of 28 mm and a diameter W of 11 mm, and the dimensional ratios of the other members were approximately as shown in the drawings.

[0052] Using commercially available mineral water as a sample liquid, the amount of bubbles contained in the sample liquid was measured using NANOSIGHT (Nanoparticle Analysis System). The amount of bubbles smaller than 500 nm was found to be 5.12 × 10 6 The number was 1 / mL.

[0053] Meanwhile, the sample liquid was poured into the container of the generator of Example 1, and the lid was closed to seal it. Next, the piston was moved up and down about 10 times to increase the pressure inside the container, and then the generator was vigorously shaken up and down about 10 times in a range of about 20 to 30 cm. After that, the pusher plate was pressed to eject the sample liquid (nanobubble water) from the ejection port. When the bubbles contained in this ejected sample liquid were measured, the amount of bubbles of 500 nm or less exceeded 100 million / mL, reaching 9.54 x 10 8 Therefore, in the method of Example 1, the nanobubbles were 9.49 × 10 8The number of cells / mL increased.

[0054] <Example 2> Except for not performing the step of shaking the container, sample water (nanobubble water) was discharged from the discharge port in the same manner as in Example 1. When the bubbles contained in the discharged sample liquid were measured, the amount of bubbles of 500 nm or less exceeded 100 million / mL, reaching 5.83 × 10 8 Therefore, in Example 2, the nanobubbles were 5.78 × 10 8 The number of cells / mL increased.

[0055] <Comparative Example 1> The tube with the microbubble generating mechanism was removed from the generating device of Example 1, and the sample liquid was passed through it. In other words, the pressurizing step and the shaking step were not performed. When the bubbles contained in the passed sample liquid were measured, the amount of bubbles of 500 nm or less was less than 100 million / mL, and was 3.33 × 10 7 Therefore, in the method of Comparative Example 1, the nanobubbles were 2.82 × 10 7 Only cells / mL increased.

[0056] <Comparative Example 2> Except for using an apparatus in which the microbubble generating mechanism was removed from the generating apparatus of Example 1, sample water was discharged from the discharge port in the same manner as in Example 1. When the bubbles contained in the discharged sample liquid were measured, the amount of bubbles of 500 nm or less was less than 100 million / mL, at 3.83 × 10 7 Therefore, in the method of Comparative Example 2, the nanobubbles were 3.32 × 10 7 Only cells / mL increased. [Explanation of symbols]

[0057] 1 Microbubble generating device 2 Container 3. Lid 4. Tube with microbubble generating mechanism 5 Internal thread 6 Lid body 7 Nozzle 8 Opening and closing mechanism 9 Pump mechanism 10 External thread 11 flow path 12 outlet 13 Push plate 14 Cylinder part 15 shaft portion 16 elastic portion 17 Expanded diameter part 18 Upper part of cylinder 19 Cylinder bottom 20 Gap 21 Mounting port 22 Guide 23 Piston 24 Pump barrel 25 Valve 26 Handle 27 Piston shaft 28 Spacer 29 Piston plate 30 Air blowing through hole 31 Fixing through hole 32 Protrusion 33 Microbubble generating mechanism 34 First tube 35 Second pipe 36 Microbubble generator 37 Housing 38 Cylindrical shaft 39 Prism 40 Radial Prism Group 41 spiral prism group 42 upper housing 43 Lower housing 44 Through hole 45 Guide 46, 47, 48, 49 O-rings

Claims

[Claim 1] A method for producing microbubbles having a diameter of 500 nm or less in a liquid at a rate of 700 million bubbles / mL or more, comprising: a sealing step of storing a liquid in a container of the microbubble generating device and sealing the inside of the container; a pressurizing step of increasing the internal pressure of the container; a shaking step of shaking the liquid in the container; a discharging step of passing the liquid through a tube provided with a microbubble generating mechanism of the microbubble generating device and then discharging the liquid to the outside of the container; In order, The microbubble generating device is portable, The container is for containing a volume of liquid of 0.1 L or more and 10 L or less; the tube disposed within the vessel; a lid having a mounting port for mounting the pipe and a discharge port communicating with the mounting port for discharging the liquid to the outside; a microbubble generating mechanism that is provided in the tube and generates microbubbles; Equipped with The lid is a pump mechanism for pressurizing the inside of the container; an opening / closing mechanism that can open and close a flow path between the attachment port and the discharge port; Equipped with The microbubble generating mechanism comprises: a microbubble generator having a plurality of rectangular pillars on a side surface of a shaft; a housing that accommodates the microbubble generator; A method for producing microbubbles, comprising:

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