WO2018134887A1 - Ultrafine bubble generation tool - Google Patents

Abstract

[Problem] To provide an ultrafine bubble generation tool with which it is possible to generate ultrafine bubbles in a liquid without separately drawing or supplying a gas (air, etc.), and which can be applied to either of a flowing liquid and a stationary liquid. [Solution] An ultrafine bubble generation tool having a shaft and a circular-column-shaped member attached to the shaft, a plurality of triangular-prism-shaped protrusions being provided to the outer peripheral surface of the circular-column-shaped member. The ultrafine bubble generation tool is disposed inside pipework or inside a pipe-shaped member through which a liquid flows. Without air being drawn or supplied to the liquid, the liquid collides with the plurality of triangular-prism-shaped protrusions, and air included in the liquid micronized, whereby the ultrafine bubble generation tool generates ultrafine bubbles.

Description

Ultra fine bubble generation tool

The present invention relates to a member or instrument for generating ultra fine bubbles in a liquid.

In recent years, a technology that uses fine bubbles in a liquid has attracted attention. The fine bubbles in these liquids are classified into microbubbles, ultrafine bubbles (also called nanobubbles), etc., depending on their sizes. In the ISO standard, ultrafine bubbles have a bubble diameter of 1 μm (1 μm (1 / 1000 mm) or less, or less than nanometer-scale extremely fine bubbles. In this specification, the term ultrafine bubble (nanobubble) is used in this sense.

Recently, techniques for using ultra fine bubbles in various fields have been studied and are currently being used. For example, it can be used for household and commercial showers to create a moisturizing effect on the skin and make it easier to remove dirt, or it can be used as a coolant for cutting parts of machine tools or as a coolant inside an engine radiator. For example, increasing the fuel efficiency of the engine by providing the same generator in the fuel injection portion of the engine and allowing liquid fuel to pass through the generator. In addition, applications in various fields such as washing vegetables, growing crops, and preparing paint are being sought.

As a premise to use the ultra fine bubble, a technology (apparatus and method) for generating this is required. At present, the reality of ultra fine bubbles has not been fully elucidated, and the structure of the apparatus for generating them is still complex, and the manufacturing cost (and hence the selling cost) is high. For this reason, industrial and research devices for generating ultra fine bubbles have been put into practical use, but other devices that can be easily used at home, for example, have not yet been put into practical use.

Proposals have also been made to generate and generate nanobubbles more easily. For example, in the invention of Patent Document 1, in order to “provide a nanobubble production apparatus that can easily produce nanobubbles without using a large-scale apparatus”, first, microbubbles having a diameter of 4 to 100 μm are provided under a predetermined pressure. Next, the nanobubbles in the range of 100 nm or less are generated in the liquid by the action of the slit plate and the collision plate provided at a predetermined distance L (paragraph [0027] of the specification) (same [0033] [0034] ]).

However, Patent Document 1 first generates microbubbles and then generates nanobubbles from the generated microbubbles, so that nanobubbles are obtained in two stages. Therefore, the microbubble manufacturing unit and the nanobubble manufacturing unit A separate manufacturing department is required.

Also, as an apparatus attached to the faucet, for example, the invention of Patent Document 2 has been proposed. However, this also means that the ultrasonic element array substrate 20 is fixed to the inside of the liquid flow path pipe 2 by the fixing means 212 and the ultrasonic vibration from the ultrasonic elements 30b and 30c is continuously applied. It is still big.

By the way, it is conceivable that the ultra fine bubble is not generated in the flowing liquid as described above, but is generated in the stationary liquid and used. In addition to being used, for example, for research on ultra fine bubbles themselves, in recent years, the use of ultra fine bubbles in daily life such as cosmetics and cooking dressings has been sought. In addition, it can be applied to gargle water.

As a technique for generating ultra fine bubbles in a stationary liquid, a fine bubble generating device using a gas-liquid mixing high-speed shearing method, a pressure-dissolving bubble generating device, and the like are known (Non-patent Document 1, p59-p62). .

In the former, liquid in the water tank and room air are sucked by a vortex pump and crushed and mixed vigorously in the pump as a gas-liquid mixed fluid, and then a gas-liquid mixed phase flow is generated in the swirling liquid flow bubble generator inside the apparatus. Passing while swirling, gas is crushed by a strong shearing force to generate fine bubbles, and finer bubbles by shearing when passing through a swirling liquid flow bubble generator installed as a disperser in the water tank It is to be released as microbubbles and nanobubbles.

The latter is a gas that is saturated by pumping liquid from the water tank with a vortex pump, self-supplying room air, then dissolving the self-supply air with a pressurizing device inside the device, and reducing the pressure to atmospheric pressure with a pressure reducing nozzle. To form fine bubbles.

However, these are intended to be used for research and industry as a matter of course, and have a complicated structure, large size, and high cost, and are used daily in individuals and homes for cosmetics and cooking dressings as described above. It is not suitable for such cases.

In addition, what has been conventionally proposed as an apparatus for generating ultrafine bubbles in a stationary liquid requires that the generated microbubbles be made into nanobubbles, as in Patent Document 3, for example, and the generated microbubbles. The configuration for generating bubbles is not always simple, such as moving the bubbles along the outer wall of the micro / nano bubble generator. As a result, for example, for cosmetics and cooking dressings as described above In addition, it has been difficult to use easily.

JP 2013-34958 JP2015-93205 JP2014-231046

The present invention has been made in view of the above problems, and can generate ultrafine bubbles in a liquid without using means for sucking and supplying a gas (air or the like) to the liquid and subdividing it. It is an object of the present invention to provide an ultra fine bubble generating tool that can be applied to both circulating liquid and stationary liquid.

In order to solve the above problems, in the present invention, air / oxygen originally contained in a liquid is extremely miniaturized.
That is, as a first aspect, the present invention provides an ultra fine bubble generating device having a shaft and a columnar member attached to the shaft, and having a plurality of triangular columnar protrusions provided on the outer peripheral surface of the columnar member. The ultrafine bubble generating device is arranged inside a pipe for sending a liquid, the triangular columnar protrusion is arranged in a spiral shape on the columnar member, and the liquid surrounds the columnar member. Each of the triangular columnar protrusions is disposed so that an angle located at the tip of the triangular flow of the liquid is substantially perpendicular to the helical flow, The liquid flowing inside the pipe for sending the liquid is included in the liquid without supplying air from the outside of the pipe for sending the liquid by colliding with the plurality of triangular prismatic projections. Air there are provided an ultra fine bubble generating devices, wherein the generating the miniaturized ultra-fine bubbles.
An ultra fine bubble generating tool having a shaft and a columnar member attached to the shaft as a second side surface, wherein a plurality of triangular columnar protrusions are provided on an outer peripheral surface of the columnar member, The fine bubble generating device is disposed inside a tubular member that is disposed in the liquid in the container and is open at least on one end side, the triangular columnar protrusion is disposed in a spiral shape on the columnar member, and the liquid is disposed in the columnar shape. It is configured so as to flow spirally around the shape member, and is arranged so that the corner located at the tip of the spiral flow of liquid in each triangular columnar protrusion is substantially perpendicular to the spiral flow The shaft is rotated by driving a motor whose power source is a dry battery or a rechargeable battery, and the cylindrical member rotates to enter the inside of the tubular member. Ultra fine, wherein the liquid collides with the plurality of triangular prismatic protrusions, and the air contained in the liquid is refined without generating air from outside the container to generate ultra fine bubbles. Provide bubble generating tools.
As a third aspect, the present invention provides the above-described ultrafine bubble generating tool in which the columnar member is formed by laminating a plurality of disk-shaped members.
As a fourth aspect, the present invention provides the triangular columnar projection close to an inner wall of a pipe or a tubular member for feeding the liquid, and sends the liquid so that the collision of the liquid with the triangular columnar projection is promoted. The ultrafine bubble generating device described above is disposed inside the tube or tubular member.
As a fifth aspect, the present invention provides any one of the above ultrafine bubble generating devices, wherein an opening for circulating liquid inside and outside the tubular member is provided on a side surface of the tubular member.

According to the present invention, an ultra fine bubble can be generated in a liquid without separately sucking or supplying gas (air or the like), and the ultra fine bubble is generated in both a flowing liquid and a stationary liquid. It becomes possible.

It is a figure which shows one Embodiment of this invention. It is a figure for demonstrating the flow of the liquid in this invention. It is a figure which shows one Embodiment of this invention. It is a figure which shows one Embodiment of this invention. It is a figure which shows the use condition of one Embodiment (FIG. 1) of this invention. It is a figure which shows the modification of this invention. It is a figure which shows the disk shaped member of the modification of this invention. It is another figure which shows the disk shaped member of the modification of this invention. It is a figure which shows other embodiment of this invention. It is a figure which shows other embodiment of this invention. It is a figure which shows the use condition of other embodiment of this invention. It is a figure which shows an example of the shaft of this invention. It is a figure for demonstrating the production | generation of the nano bubble in this invention. It is a figure which shows one Embodiment of this invention. It is a figure which shows the example (example other than triangular prism shape) of the protrusion in this invention, and is the figure which showed the protrusion from the top. It is a figure which shows the ultra fine bubble generation tool used in the experiment example concerning one Embodiment of this invention.

Hereinafter, embodiments according to the ultrafine bubble generating device of the present invention will be specifically described with reference to the drawings.

(Embodiment 1)
The present embodiment relates to a case where ultrafine bubbles are generated in a liquid flowing inside a pipe (particularly a pipe for sending a liquid) such as a water supply, a shower, or a hose.

As shown in FIG. 1, an ultrafine bubble generating device 1 according to the present invention includes a shaft 2 and a columnar member 3 attached to the shaft 2. The surface (outer peripheral surface) 4 of the cylindrical member 3 is provided with a plurality of triangular projections (triangular prism-shaped projections 5) having a triangular shape when viewed from the top.

In the generation of conventional ultra fine bubbles, as described above, ultrasonic vibration is continuously applied, the sucked gas is mixed with the liquid, the gas is crushed by a strong shear force, or the self-supplied air is generated. There is a need for means for generating gas or mixing gas into liquid, such as dissolution and decompression to atmospheric pressure, and formation by precipitation of saturated gas. On the other hand, in the present invention, ultrafine bubbles are generated by ultrafine air / oxygen contained in the liquid.

As is well known, a certain amount of air usually dissolves in the liquid. For example, about 24 mg of air dissolves in about 2% of air with respect to the volume of water at 20 degrees C. and 1 L of water in terms of weight. In this way, a flow is created in the liquid in which air and oxygen are dissolved, and the air and oxygen in the liquid collide.

That is, as shown in FIG. 2, if one corner (the corner indicated by reference numeral 6 in FIG. 2) is arranged so as to face each other in the direction in which the liquid flows, for each of the plurality of triangular prism-like projections 5, (As shown by arrow 7). The separated liquid flows along the side surfaces 8 of the triangular prismatic protrusions, but the side surface (side surface along the flow direction) 8 is interrupted at the next corner 9, so that the liquid flows around these corners (9). A flow in another direction (referred to as turbulent flow) occurs. In the case of the triangular prism shape, the angle 9 constituting the side surfaces 8 and the side surface 12 facing in the flow direction can be narrower than that of a polygon such as a quadrangle, so that the turbulent flow 10 can easily occur.

In the adjacent triangular prism-shaped projections, a diverted liquid flow and turbulent flow are generated in the same manner.

Since liquid flows in the pipe (inside the pipe), the movable range is limited. That is, the flow direction is limited by the pipe (the liquid does not diffuse).

Therefore, it is considered that the liquid collides with the plurality of triangular prism-shaped projections 5 and flows while being divided or sheared, and the generated liquid flow and turbulent flow repeatedly collide, and ultra fine bubbles are generated in this process. In this process, the molecular structure of the liquid becomes unstable, and the fine bubbles generated by further collision and fragmentation are negatively charged and rapidly shrink to change into ultrafine bubbles, that is, ultrafine bubbles. There is a possibility.

As described above, it is considered that when triangular prismatic projections are used, it is considered that a split flow is generated in the liquid flow and a turbulent flow is likely to occur. Therefore, in the present invention, the triangular prismatic projections 5 are used to generate ultrafine bubbles. For example, the triangular columnar protrusions 5 can be arranged on the outer peripheral surface of the columnar member so as to be more aligned as shown in FIG. 3, but the triangular columnar protrusions 5 are arranged so that collision of liquid flow and turbulent flow is likely to occur. preferable. Various arrangements are conceivable. As an example, an arrangement slightly shifted as shown in FIG. 1 can be considered.

Further, as shown in FIG. 4, a plurality of triangular columnar protrusions can be arranged in a spiral shape in the longitudinal direction of the columnar member 21 so that collision of liquid flow and turbulent flow is likely to occur.

If the distance between adjacent triangular projections is too short, the generation of turbulent flow or the promotion of collision may be hindered, and the generation of ultra fine bubbles may not be promoted. Referring to FIG. 13A, the liquid flow 7a along the triangular columnar protrusion 5a generates a turbulent flow 10a around the corner 9a. If the distance between the turbulent flow 10a and the triangular columnar protrusion 5b is too short, the liquid flow 7b may be weakened by the influence of the turbulent flow 10a, and the turbulent flow 10b generated around the corner 9b is small. There is a possibility. Therefore, it is preferable to arrange the plurality of triangular prismatic protrusions at a distance that does not weaken the occurrence of turbulent flow.

As an example, as shown in FIG. 13 (b), the triangular columnar projections 5 are formed in the longitudinal direction of the columnar member by 1... Of perpendicular A from the corner 6 of the triangular columnar projection 5 to the side surface B facing in the flow direction. A distance of about 5 times (A + A / 2) and a distance (B / 2) of about 0.5 times the side B of the side surface facing the flow direction of the triangular columnar protrusion 5 are provided in the circumferential direction. Also good.

Alternatively, in order to increase the generation of turbulent flow, it is preferable to configure and arrange the triangular columnar protrusions so that the liquid passes while turning around the cylindrical member. For example, as shown in FIG. 14, the triangular prism-shaped triangle is a vertically long isosceles triangle, and the passage through which the liquid passes is arranged in a spiral shape.

In this case, it is preferable to provide the blades 24 on the cylindrical member. By providing the blades in a spiral shape, it is possible to induce or promote a flow for the liquid to pass around the cylindrical member.

As shown in FIG. 14, when the blades are provided on the tip side of the cylindrical member (the tip direction of the shaft = the side indicated by reference numeral 13), the flow is guided. However, arrangement | positioning is not restricted to such a location, For example, it may provide in the center of a cylindrical member, etc., and may make it generate | occur | produce and promote the generated flow further.

The blades may be a series (see FIG. 14) or may not be a series (even if there is a break), and in any case, the blades can be composed of a plurality of parts.

When the triangular prism shape is arranged and configured in this way, the liquid passes while swirling around the cylindrical member, and at that time, the liquid can collide almost perpendicularly with the corners of the respective triangular prism-shaped projections according to the flow. Become. Moreover, the generation of turbulent flow can be promoted by this swirl flow.

By changing the angle of the triangular prismatic projection, the number of triangular prismatic projections, the size, etc. according to the viscosity, flow rate, flow rate, hydraulic pressure, etc. of the liquid, it is possible to obtain the desired (close) amount of ultra fine bubbles. It becomes.

As for the shape of the protrusion, as described above, a triangular prism shape can be cited as a suitable example that facilitates the generation of the ultrafine bubbles by facilitating the splitting and turbulent flow in the liquid flow. The shape (cross-sectional shape) is not necessarily a strict triangle. For example, the shape shown in FIG.

An example of the shaft of the present invention is shown in FIG. The shaft 2 is preferably configured so that the tip 13 is rounded and flows directly toward the outer periphery of the triangular projection 5 so as to easily collide with the triangular columnar projection 5 when a liquid flow is applied to the tip. For example, as shown in FIG. 1, the conical portion 14 of the shaft 2 and the outer peripheral surface 4 of the cylindrical member 3 have no step (for example, the diameter of the conical portion 14 is smaller than the diameter of the cylindrical member 3). It is preferable that the configuration is continuous.

FIG. 5 shows an example in which the ultra fine bubble generating tool according to the present embodiment is arranged inside the pipe 15 (longer than the longitudinal dimension of the cylindrical member) through which the liquid flows. When the liquid 16 flows in the tube at a predetermined pressure, the liquid collides with the triangular prism-shaped protrusion 5 when passing through the device of the present invention, and ultrafine bubbles are generated by the above action. Further, since the triangular columnar projection is surrounded by the tube 15, the liquid passes through the flow path formed by the triangular column projection in a limited space at high speed, and the generated liquid flow collides with the inner wall of the tube 15, It promotes the collision of flow and turbulent flow and promotes the generation of ultra fine bubbles. In order to promote such a collision, it is preferable that the triangular columnar protrusion and the inner wall of the tube are brought close to each other.

(Modification 1)
The columnar member can be formed by connecting or laminating a plurality of disk-like members 17. An example is shown in FIG.

Usually, if the length of the columnar member provided with the triangular columnar protrusion 5 is increased, the number of occurrences of ultrafine bubbles increases because the collision of liquid or air in the liquid increases, and if this length is decreased. The number of ultra fine bubbles is reduced. When the cylindrical member is constituted by a plurality of disk-shaped members 17, the number of ultra fine bubbles generated can be adjusted by adjusting the number of disk-shaped members to be attached.

FIG. 7 is a view showing the disk-like member 17 from three directions. As shown in FIG. 7, the disk-shaped member is provided with a hole 18 through which the shaft passes in the center, and the disk-shaped member is fitted to another disk-shaped member in a portion adjacent to the outer periphery of the hole 18. A plurality of fitting holes 19 and fitting projections 20 are provided. A disk-shaped member is formed by providing a plurality of triangular prismatic protrusions outside the fitting hole.

As shown in FIG. 8, the center portions 22 and 23 of the bosses of the fitting hole 19 and the fitting convex portion 20 may be formed so as to be displaced by a certain angle. When 10 to 20 disk-like members 17 are successively connected, for example, the center parts 22 and 23 of the fitting holes and the bosses of the fitting convex parts are disk-like so as to be displaced by 4.5 to 4.8 degrees. When the member 17 is formed and a plurality of disk-shaped members are fitted, the protrusions on the outer peripheral portion of the adjacent disk-shaped members are shifted from each other by the angle. The arrangement of the triangular prismatic protrusions has a spiral shape.

The cylindrical member can be manufactured by plastic molding or press molding. If the cylindrical member is constituted by a plurality of disk-like members, it is highly likely that production cost merit will be greatly increased due to mass production and high cost performance compared to the price of existing nanobubble generators.

The connection of the disk-shaped members can be appropriately performed. For example, the disk-shaped members may be bonded with an adhesive or may be ultrasonically welded.

(Modification 2)
It is also conceivable to generate ultrafine bubbles in a form different from the above using the principle of the present invention. For example, a plurality of triangular prismatic projections can be directly attached to or arranged on the inner wall of a pipe through which liquid flows.

(Embodiment 2)
The present embodiment relates to a case where ultra fine bubbles are generated in a stationary liquid such as cosmetics, dressings, and gargle water contained in a container.

Also in the present embodiment, the points described in the first embodiment can be applied to the columnar member, the triangular columnar protrusion, and the shaft. The ultra fine bubble generating tool 101 is attached to a shaft 102 with a cylindrical member 103 (which can be configured by laminating disk-like members as described later) having a plurality of triangular columnar protrusions 105 provided on the outer peripheral surface 104. The configuration is as follows.

Here, in order to cause the liquid to collide with the triangular columnar protrusion 105, the shaft 102 is rotated by the motor 100, and thereby the columnar member 103 attached to the shaft 102 is rotated. By such rotation, the triangular columnar protrusion 105 provided on the columnar member 103 is made to collide with the liquid.

The ultra fine bubble generating tool of the present invention is composed of a shaft, a columnar member, and a disk-like member that can be reduced in weight, and does not require a large amount of power to drive the motor 100. Therefore, the power source of the motor of the present invention can be operated with a low power source / low power / low voltage of a dry battery or a rechargeable battery (but not limited to, for example, about 1.2V) (however, the power source is limited to the battery). However, it is also possible to use a household power source that is normally used in ordinary households because a low power source is sufficient. As an example, when a 1.2V battery is used to make a generator of ultrafine bubble water for gargle, the weight of the entire device including the battery is about 300 g, and the size of the device is about 10 cm long × about 10 cm wide × height. It is possible to fit in a size of about 15 cm. As described above, according to the present invention, it is possible to reduce the size, weight, and portability of the entire ultrafine bubble generating tool that has not been seen in the past.

As described above, the range in which the liquid can move when the liquid flows in the pipe is limited. In other words, the flow direction of the liquid is limited by the pipe (the liquid does not diffuse). Therefore, also in the present embodiment, by setting the compartments in this way, it is promoted that the liquid in the compartment collides with the plurality of triangular prismatic protrusions and repeats the division.

From this point of view, the triangular columnar protrusion 105 is configured to be surrounded by a tubular member. According to this, it becomes possible to generate a liquid flow in a limited space, the liquid passes through the flow path formed by the triangular prism protrusion at high speed, and the generated liquid flow is efficient in the tubular part wall. In addition, the collision of liquid flow and turbulent flow can be promoted, and the generation of ultra fine bubbles can be enhanced. In order to promote this collision, it is preferable that the longitudinal dimension of the tubular member covers the triangular columnar protrusion of the cylindrical member. Moreover, you may comprise so that a triangular prism-shaped protrusion and the inner wall of an annular member may be adjoined.

In addition, in this specification, the term “pipe” includes a so-called pipe-like shape as in the first embodiment, and the tubular member in this embodiment includes a member that covers the tube.

FIG. 9 shows an example of the ultra fine bubble generating tool 101 according to the present embodiment, and FIG. 10 shows an example of the case where the tubular member 107 is used. The tubular member 107 is configured such that one surface of the top surface or the bottom surface (the bottom surface side 108 positioned below in FIG. 10) is open, and the liquid flows into the inside.

As shown in FIG. 10, it is preferable that the tubular member is provided with an opening 109 for circulating the liquid into and out of the member. As a result, the liquid that has flowed in from one surface of the tubular member 107 (the bottom surface side 108 positioned below in FIG. 10) ascends and passes around the cylindrical member, flows out of the opening 109, and again flows into the bottom surface. It flows from the side 108 into the inside of the tubular member (upflow pattern). Alternatively, the liquid flowing in from the opening 109 descends and passes around the cylindrical member, flows out from the bottom surface side 108, rises outside the tubular member, and flows in again from the opening 109 (downflow pattern). .

</ RTI> By repeating the circulation of the liquid flow in this way, the number of ultra fine bubbles generated is further improved dramatically.

In addition, the upward flow pattern and the downward flow pattern can be changed by the inclination of the triangular prismatic protrusion. In the case of the upward flow pattern, the apex of each triangular prismatic projection (the angle that first collides with the flow) is below the horizontal line (the angle between the vertical line from this apex to the bottom and the horizontal line is about 15 degrees, for example. Tilt). On the contrary, a downward flow pattern can be obtained by inclining the apex of each triangular prism-shaped protrusion above the horizontal line.

FIG. 11 shows an example of using the ultrafine bubble generating tool of the present invention using the tubular member 107. FIG. 11 shows a state in which a tubular member surrounding a cylindrical shape is submerged in the liquid 112 in the container 110. An arrow 115 indicates the direction of rotation of the motor, and an arrow 114 indicates the direction of liquid flow. FIG. 11 shows the case of the upward flow pattern. In the direction indicated by the arrow 114, the liquid flows in from the bottom surface side 108 of the tubular member 107 and flows out from the upper opening 109, and these are repeated.

In the case of the first embodiment, depending on the liquid flow rate (when it is small), the flow velocity (when it is slow), it may be difficult to generate ultra fine bubbles, but in this embodiment, the rotational speed of the motor is adjusted. Therefore, this problem can be dealt with.

When producing an ultra fine bubble according to the present embodiment, it can be used for liquid mixing and stirring. For example, when liquid dressing is put in a container and the apparatus of the present invention is operated, vinegar and oil can be easily mixed.

(Modification)
Also in the present embodiment, the cylindrical member can be formed by a plurality of disk-shaped members, and these can be manufactured by plastic molding or the like.

Further, the triangular prism-shaped protrusions only need to be configured so that the liquid collides with one corner and flows while being divided, and the generated liquid flow and turbulent flow repeat the collision. It is good also as a shape in which the triangular cut is provided in the base (bottom) side at the time of setting it as a vertex.

In the present invention, it is possible to generate ultra fine bubbles without injecting gas into the liquid, but it is also possible to use injecting gas together. That is, in the apparatus and method of the present invention, a gas (nitrogen, carbon dioxide, ozone, etc.) can also be injected into the liquid.

Hereinafter, experimental examples of generation of ultrafine bubbles according to the present invention will be shown.

(Experimental example 1)
An experimental example using the first embodiment is as follows.
(1) As shown in FIG. 16, 16 disk-shaped members (8 triangular prism protrusions are formed on one disk-shaped member) are stacked and arranged in a pipe for sending a liquid constituting the ultra fine bubble generator of the present invention. In this tube, industrial purified water (sample name: D (Delta) 40) stored in the water tank was circulated 40 times with the following circulation pump, and industrial purified water was fed to the ultrafine bubble generator.
Circulation pump: Tsurumi Manufacturing Co., Ltd. (Tsurumi Pump)
Model NO FP-5S
Performance Pumping height MAX 5.5m
Discharge amount MAX 35L
(2) The measuring instrument used was as follows.
UK NanoSight LM System LM10-HSBT14
The EMCCD camera and blue laser (3) measurement results are as follows, and a sufficient number of ultrafine bubbles were observed.
Ultrafine bubble total particle concentration: 136 billion particles / mL
Average diameter: 217 nm +/- 13.7 nm
Mode diameter: 152nm +/- 17.8nm

(Experimental example 2)
An experimental example using a modification of the second embodiment is as follows.
(1) Cylindrical member Four disk-shaped members (8 triangular prism protrusions are formed on one disk-shaped member) are stacked, and each triangular prism protrusion is arranged as shown in FIG. 9 (however, FIG. 9 is disk-shaped) The number of members is different).
(2) Type and amount of liquid Industrial purified water, 75 ml.
(3) Flow velocity The motor was rotated 20,000 per minute. After rotating for 1 minute, leaving for 30 seconds was repeated 10 times (the total motor rotation time was 10 minutes).
(4) Measurement object The number, the mode diameter, and the average diameter of the ultra fine bubbles in the liquid were measured.
(5) Measuring device A nanoparticle analyzer (LM10) manufactured by Malvern, UK was used.

The experimental results are shown in Table 1 below.

(Note) The number of the above ultra fine bubbles is a measured value of the number when the liquid after the generation of ultra fine bubbles is diluted 10 times.

As shown in Table 1 above, it was confirmed that ultrafine bubbles (average diameter 122.6 nm, mode diameter 100.2 nm) were generated at least 7.39 mm × 10 8 / ML (dilution 10 times) according to the present invention. That is, about 7.4 billion ultra fine bubbles were generated in 1 milliliter of liquid (industrial purified water).

In the present invention, it is considered important that the liquid flowing along the side surface of the triangular prism-shaped protrusion is likely to generate turbulent flow and the liquid flow / turbulent flow repeatedly collides. In order to easily generate turbulent flow, it is considered that it is desirable that the angle between the two sides forming the side surfaces facing the respective side surfaces in the flow direction (the corners other than the corners at the front end of the liquid flow) is small. Although this depends on the relationship with the angle of the tip corner, it is considered preferable that one of the two angles is less than a right angle (90 degrees). For example, when the triangular prismatic protrusion is formed in a rhombus shape, the turbulent flow is less likely to occur.

In the present invention, the liquid flows between the triangular columnar protrusions and between the inner wall of the tube and the tip side of the triangular columnar protrusion. The inner wall of the tube and the tip side of the triangular prismatic protrusion can be close to a certain extent, but in the present invention, since the shape of the protrusion is a triangular prism, liquid can flow sufficiently between the protrusions, pressure loss is unlikely to occur, and the flow rate is reduced. It is hard to be done. Therefore, a sufficient swirling flow of liquid can be obtained, liquid can be easily divided and turbulent flow can easily occur, and ultra fine bubbles can be easily generated. On the other hand, for example, when the protrusions are diamond-shaped, the flow path is limited, pressure loss occurs, and the flow velocity is reduced compared to the case of triangular prismatic protrusions.

According to the present invention, it becomes possible to dramatically and easily generate ultra fine bubbles that have been conventionally generated by large-scale devices, so that they are not only for industrial and research purposes, but also for home and consumer use. As a result, it is possible to apply technology using ultra fine bubbles in many situations.

Further, in the present invention, ultra fine bubbles can be generated not only in the circulating liquid but also in the stationary liquid stored in the container.

Thus, the industrial applicability of the present invention is extremely high.

1, 11, 21, 101 Ultra fine bubble generating tool 2, 102 Shaft 3, 103 Cylindrical member 4, 104 Surface (outer peripheral surface) of cylindrical member 3 or 103
5, 105 Triangular prism-shaped protrusions 6, 9 Corners of triangular prism-shaped protrusion 5 Liquid diversion, liquid flow 8 Side surface 10 along the flow direction of triangular columnar protrusion 5 Turbulence 12 Side surface 13 facing the flow direction of triangular columnar protrusion Shaft tip 14 Conical portion 15 of the shaft 15 Pipe 16 Liquid flow 17 Disk-like member 18 Hole through which the shaft passes 19 Fitting hole 20 Fitting convex portions 22 and 23 Center portion 24 Blade 107 Tubular member 108 Bottom side of the tubular member 109 Opening 110 Container 112 Liquid 113 Ultra Fine Bubble 114 Liquid Flow Direction 115 Motor Rotation Direction

Claims (5)

1. An ultra-fine bubble generating tool having a shaft and a columnar member attached to the shaft, and having a plurality of triangular columnar protrusions provided on the outer peripheral surface of the columnar member,
   The ultra fine bubble generating tool is arranged inside a pipe for sending a liquid,
   The triangular prismatic protrusions are arranged spirally on the cylindrical member so that the liquid flows spirally around the cylindrical member, and each triangular prismatic protrusion has a tip with respect to the spiral flow of liquid. Is placed so that the corner located at is substantially perpendicular to this spiral flow,
   The liquid flowing inside the pipe for sending the liquid collides with the plurality of triangular prismatic protrusions, so that the air contained in the liquid is supplied without supplying air from the outside of the pipe for sending the liquid. Ultra fine bubble generating tool characterized by generating ultra fine bubbles.
   
2. An ultra-fine bubble generating tool having a shaft and a columnar member attached to the shaft, and having a plurality of triangular columnar protrusions provided on the outer peripheral surface of the columnar member,
   The ultra fine bubble generating tool is disposed inside a tubular member that is opened in at least one end side that is disposed in the liquid in the container,
   The triangular prismatic protrusions are arranged spirally on the cylindrical member so that the liquid flows spirally around the cylindrical member, and each triangular prismatic protrusion has a tip with respect to the spiral flow of liquid. Is placed so that the corner located at is substantially perpendicular to this spiral flow,
   When the shaft is rotated by driving a motor whose power source is a dry battery or a rechargeable battery and the columnar member rotates, liquid entering the inside of the tubular member collides with the plurality of triangular columnar protrusions. An ultra-fine bubble generating tool characterized in that air contained in a liquid is refined to generate ultra-fine bubbles without supplying air from the outside.
   
3. The ultra-fine bubble generating tool according to claim 1 or 2, wherein the columnar member is formed by laminating a plurality of disk-shaped members.
   
4. The triangular columnar protrusion is disposed inside the tube or tubular member for sending the liquid so that the collision of the liquid with the triangular columnar protrusion is promoted by bringing the triangular columnar protrusion close to the inner wall of the tube or tubular member for sending the liquid. The ultra fine bubble generating tool according to any one of claims 1 to 3.
   
5. The ultra fine bubble generating tool according to claim 2, wherein an opening for circulating a liquid inside and outside the tubular member is provided on a side surface of the tubular member.
   

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