JP5829635B2 - Micro-bubble nano-bubble device - Google Patents

Description

  The present invention relates to a microbubble nanobubble generating apparatus that generates nanobubbles from microbubbles.

  Microbubbles are names for fine bubbles with a diameter of 50 μm or less, and those with a small diameter of 1 μm that are generated during the reduction process are called nanobubbles. As a method for obtaining microbubbles, a pressure-reduced pressure method and a gas-liquid (cutting) cutting method are known. In order to generate micro bubbles, a nozzle for generating fine bubbles is used in the last step. This nozzle is used to make microbubbles into microbubbles, and its basic configuration is almost fixed as seen in Japanese Patent Application Laid-Open No. 2006-043642.

  Methods and apparatuses for generating nanobubbles are also known, and various types have been proposed. However, conventional methods and devices for producing nanobubbles are generally special and expensive compared to producing microbubbles. For example, according to the method for producing nanobubbles disclosed in Japanese Patent Application Laid-Open No. 2005-245817, as means for applying physical stimulation to microbubbles contained in a liquid, discharge by a discharge generator, ultrasonic waves by an ultrasonic oscillator, Although means and methods including flow by operating a rotating body are listed, each has a problem that a special device is required.

JP 2006-036442 A JP-A-2005-245817

  The present invention has been made paying attention to the above points, and its object is to make it possible to make microbubbles into nanobubbles without using a special or special apparatus. Another object of the present invention is to provide a microbubble nanobubble generation device that can be continuously nanobubbled on the extension of microbubble generation by adding a relatively simple element to the microbubble generation device. It is.

In order to solve the above-mentioned problem, the present invention mixes a gas taken in from a gas intake unit and a liquid taken in from a liquid intake unit, and sends out the obtained gas-liquid mixed fluid from a pump, By applying expansion, contraction, and stirring to the gas-liquid mixed fluid, a microbubble generating unit having a nozzle hole that generates microbubbles and ejects them to the outside, and has a winding diameter and the number of windings of a predetermined radius. A nanobubble generator having a spiral flow path wound in a spiral shape, and the microbubble generator is provided with a nozzle body, and the nozzle body has an inlet into which gas-liquid mixed fluid flows at one end. A hollow nozzle case having an end face where the fluid collides with the other end, and a resistance to the moving fluid in the interior from the inlet to the wall surface of the hollow nozzle case. An expansion / contraction stirrer installed to make the nozzle face formed in the peripheral surface so as to surround the end face from the fluid flow direction outward in order to eject the fluid after colliding with the end face to the outside. The nozzle case has a coupling means with the fluid supply side on the outer peripheral surface on the inlet side, and a part of the expansion / contraction stirring unit is pressurized against the fluid supply side when coupled with the fluid supply side. The expansion / contraction stirring part has a shape protruding in the fluid flow direction at the center part, and has a filter member made of an elastic material, and between the filter member and the spacer ring, It has a configuration in which a collision plate having a small hole through which a fluid is allowed to pass is disposed, and one end of the helical flow channel is connected to a microbubble generating unit, and nanobubbles are connected from the other end of the helical flow channel. Configure to spill In which it took measures that.

  As clearly shown in the above configuration, the apparatus of the present invention includes a gas-liquid mixed fluid generation unit, a microbubble generation unit, and a nanobubble generation unit. Among these, the gas-liquid mixed fluid generating unit and the microbubble generating unit are also used for generating microbubbles in the present inventor and are well known. Therefore, in the apparatus of the present invention, the nanobubble generator corresponds to a relatively simple element added on the extension of the microbubble generator.

  The gas-liquid mixed fluid generation unit has a basic configuration in which the gas taken in from the gas intake unit and the liquid taken in from the liquid intake unit are mixed and the obtained gas-liquid mixed fluid is sent out from the pump. For example, air is formed into fine bubbles and mixed with water by the gas-liquid mixed fluid generation unit, and many of the fine bubbles at this stage are larger than 50 μm in diameter. In addition to air and water, for example, gas such as carbon dioxide, nitrogen and ozone, or various functional waters such as medical sterilizing water, washing water, electrolyzed water, and ozone water mainly containing water. (According to the Japan Society of Functional Hydrology), and all kinds of liquids such as food additives.

  The microbubble generating unit includes a nozzle hole for generating microbubbles by applying expansion, contraction, and stirring to the gas-liquid mixed fluid and ejecting the microbubbles to the outside. For example, the microbubble generator is provided with a nozzle body having one end opened as an inlet and the other end closed as an end face, and having a nozzle hole in a radial direction at the other closed end as described later. ing. In this case, the gas-liquid mixed fluid flows into the hollow interior from the inlet at one end of the nozzle, is changed to a fine bubble by the expansion / contraction stirrer, changes its direction in the radial direction, and is ejected from the nozzle hole to the outside. In the microbubble generating unit, it is desirable that the microbubble generation proceeds in three stages in the compression / expansion member, the filter unit, and the nozzle hole as described above. The microbubbles can be generated stably.

  The nanobubble generator has a spiral flow path wound in a spiral shape having a winding diameter and the number of turns of a predetermined radius. The gas-liquid mixed fluid that has passed through the upstream microbubble generator and is filled with microbubbles composed of microbubbles flows into the nanobubble generator and is converted into nanobubbles while passing through the helical channel. The conversion of microbubbles into nanobubbles by such an apparatus has been identified by an applicant company engaged in the manufacture and sale of microbubble generation apparatuses. Specifically, when a helical member is connected to the microbubble generator and the microbubble generator is operated, the gas-liquid mixed fluid that appears to turn white if microbubbles changes from white to almost colorless and transparent. Recognizing the changing facts, we confirmed that nanobubbles are progressing.

  The other end of the helical flow path in the nanobubble generating part is connected to a liquid tank that stores nanobubbles, and the liquid tank and the liquid intake part of the gas-liquid mixed fluid generating part are connected by a circulation path. This is desirable for the present invention. The gas-liquid mixed fluid composed of microbubbles does not turn into 100% nanobubbles just after passing through the nanobubble generation unit, but it is possible to promote nanobubble formation by circulating through the circulation path. However, even when a circulating water tank is used, a method of always adding clean water and draining at a constant water level in the water tank can also be adopted. Moreover, the method of pouring nano bubble water on a target object without collecting in a water tank can also be taken.

  The helical channel can be formed by, for example, a tube made of synthetic resin, and the tube is configured by closely winding a single continuous tube. Leads to. As for the tube, one made of metal, synthetic resin or other material can be used, and the winding method is also such that the coil elements are wound at intervals like a compression coil spring. In addition, the winding method of the tubular body in the present invention can be appropriately selected so that there are some in which coil elements are wound in close contact like a coil spring such as a tension spring.

  Note that microbubbles are described as, for example, a supersaturation phenomenon of gas dissolution, and the size of the microbubbles is variously defined depending on the field. Therefore, the range of 50 to 1 μm in diameter is a microbubble, but in the present invention, the one having a diameter between them is when microbubbles are ejected from the microbubble generator. Those having a diameter of less than 1 μm are referred to as nanobubbles. Therefore, in the present invention, the above is defined as nanobubbles. The microbubbles generated in this way pass through the helical flow path of the nanobubble generating part, and some of the microbubbles flowing out from the other end are nanobubbled.

  Since the present invention is configured and operates as described above, a gas-liquid mixed fluid composed of microbubbles can be removed from a helical channel composed of an arbitrary material without using a special or special device. By passing the formed nanobubble generation unit, the microbubbles can be converted into nanobubbles. In addition, according to the present invention, by adding a relatively simple element made of a synthetic resin tube as a spiral flow path to the microbubble generating device, the microbubble generating device can be continuously extended on extension of microbubble generation. It is possible to provide a microbubble nanobubble generation apparatus that enables nanobubble generation.

  Hereinafter, the present invention will be described in more detail with reference to illustrated embodiments. FIG. 1 shows an example of a microbubble nanobubble generator 10 according to the present invention. The nanobubble generator 10 includes a gas-liquid mixed fluid generator 11, a microbubble generator 12, a winding diameter of a predetermined radius, and the like. A nanobubble generator 14 having a helical flow path 15 wound in a helical shape having a number of turns is provided. The gas-liquid mixed fluid generation unit 11 and the microbubble generation unit 12 are connected by a conduit 13.

  The gas-liquid mixed fluid generation unit 11 mixes the gas taken in from the gas intake unit arranged inside and the liquid taken in from the liquid intake unit, and the obtained gas-liquid mixed fluid is similarly installed inside. It has a function to send out using a pump. Therefore, the gas-liquid mixed fluid generating unit 11 includes a gas intake unit and a liquid intake unit, and the liquid intake unit is connected to the end of a circulation path 18 to be described later. In addition, although the gas used in embodiment is air and the liquid is purified water, it is as having mentioned above that gases and liquids other than the above can be used.

  Specifically, the microbubble generating unit 12 has a configuration to be described later, and generates microbubbles by applying expansion, contraction, and stirring to the gas-liquid mixed fluid, and finally the outside. Nozzle holes 26 are provided for jetting out. The microbubble generating unit 12 and the nanobubble generating unit 14 are connected using a pipe 13, and microbubbles that flow into one end of the helical channel 15 become nanobubbles while turning the helical channel 15. Then, it flows out from the other end as microbubbles that have been made into nanobubbles.

  The above-described microbubble generating unit 12 nozzle body 20 has a nozzle case 21, has an inlet 22 through which a gas-liquid mixed fluid flows at one end, and an end face 23 with which the fluid collides at the other end. (See FIG. 2). Since the nozzle case 21 has a hollow cylindrical structure, one open end serves as an inflow port 22, and the other closed end serves as an end surface 23, and the gas-liquid mixed fluid flows in from the inflow port 22, and the inside of the hollow cylindrical structure As a flow path, it flows out from a nozzle hole 26 described later to the outside. The nozzle case 21 has a cylindrical shape with a circular cross section. Therefore, the internal flow path is parallel to the central axis of the cylinder, and the flow toward the nozzle hole 26 is a radial position substantially orthogonal to the central axis of the cylinder. Change into a relationship.

  The illustrated nozzle case 21 is formed in a hollow cylindrical structure composed of two chambers 24 and 25 on the upstream side and the downstream side. On the end face 23 side of the downstream chamber 25, a radial nozzle hole 26 is formed surrounding the end face 23 from the fluid flow direction to the outside in order to eject the fluid after the collision to the outside. A plurality of nozzle holes 26 are provided radially outward from the center of the cylindrical structure and at equal intervals. The nozzle case 21 is desirably formed thick by cutting a metal lump made of stainless steel, but is not limited to the above metal material, and for example, a resin having chemical resistance can be used. It is. Thereby, the form of the nozzle hole 26 is larger in the length of the hole than the hole diameter, and the fluid can be ejected farther.

  In the nozzle case 21, an expansion / shrinkage stirring unit 30 is provided in the upstream chamber 24, which is installed to exert resistance and stir the moving fluid. The expansion / contraction stirrer 30 includes a collision plate 27 disposed on the most inlet side (upstream side), a filter member 28 disposed on the immediately downstream side (downstream side), and the most downstream side with a large diameter on the inflow side. And a collective filter 31 having a plurality of filter elements arranged inside a cylindrical member 29 having a small diameter on the outflow side.

  The collision plate 27 has a plate surface that blocks the flow path, and is formed with several small holes 27a that allow the fluid to pass through the plate surface. The collision plate 27 causes the fluid to collide with the block and pass through the small hole 27a. A compressive action is added. The filter member 28 is made of an elastic material, has a shape protruding in the fluid flow direction at the center, has a micro hole 28a formed on the entire surface, and is disposed so as to contact the rear surface of the immediately preceding collision plate 27. take. The cylindrical member 29 includes a front plate 29b in which a plurality of pores 29a are formed in a distributed manner on the inlet side, and several stages of filter elements 29c arranged on the outlet side, and around the slit 29d. Have on the surface.

  In the expansion / contraction stirrer 30 in the illustrated example, the small hole 27a of the collision plate 27 has a larger diameter than the small hole 29a of the front plate 29b, and the minute hole 28a between them has a smaller diameter than the small hole 29a. It is the structure by which compression and expansion | swelling by passage of this hole are repeated. Further, the several stages of filter elements 29c are composed of several combinations of different meshes. Although the fluid can flow out into the gap 24a with the inner wall of the large chamber 24 at the slit 29d, this is a dead end, and the flow line of the fluid that goes outward at one end returns to the inside again.

  The expansion / contraction agitation unit 30 has spacer rings 32 and 33 made of an elastic material arranged on the inlet side of the nozzle case 21, and the coupling means 34 between the nozzle case 21 and the fluid supply side is a screw connection. The spacer rings 32 and 33 are elastically deformed when coupled to the fluid supply side by screw coupling, so that the expansion and contraction stirring unit 30 is fixed and the watertight seal is completed. The spacer rings 32 and 33 are formed of circular rings, and are received by the flange 29e on the cylindrical member 29 side. The spacer rings 32 and 33 act in a liquid-tight manner on the fluid and contribute to the improvement of the microbubble formation rate. Further, in order to elastically deform the spacer rings 32 and 33 and to make the watertight seal more complete, the spacer ring 32 is set so as to protrude by a slightly smaller dimension than the front end portion 35a of the body circumferential portion 35.

Therefore, the spring constants of the spacer rings 32 and 33 are k ₁ and k ₂ , the spring constant of the filter member 28 is k _3, and the equation: 1 / k = 1 / k ₁ + 1 / k ₂ + 1 / In order to obtain the fixation of the expansion / contraction stirrer 30 and the fluid tightness to the fluid by k ₃ , a material having an optimum value can be selected. The nozzle body 20 of the microbubble generating unit 12 is configured such that the expansion / contraction stirring unit 30 from the spacer ring 32 to the cylindrical member 29 is incorporated inside the nozzle case 21 and can be handled as a whole.

  The nozzle body 20 has a large-diameter trunk portion 35 that surrounds the outer periphery of the nozzle case 21, and this portion is a portion that is held when the microbubble generating nozzle 12 is handled. Further, the front end portions 35a and 35b of the body circumferential portion 35 are portions that serve as positioning surfaces when the fine bubble generating nozzle 12 is combined with other members. FIG. 3 shows an example of an outer case in which the nozzle body 20 is applied to running water. The nozzle case 21 and the coupling means 34 and 37 on the fluid supply side 36 of the outer case are screw-coupled, and the front end portion 35a configured to complete the watertight seal abuts on the coupling surface 36a of the fluid supply side 36. Further, the end portions 35b abut against the corresponding coupling surfaces 36b, and constitute a watertight seal in which the spacer rings 32, 33 and the like are pressed by a small size by tightening. Reference numerals 36c and 38c denote connection portions.

  The gas-liquid mixed fluid flows from the inlet 22 into the microbubble generating unit 12 through the pipe line 13 and sequentially passes through the collision plate 27, the filter member 28, and the collective filter 31 arranged in the internal flow path. The gas-liquid mixed fluid passes through the pores 27a while colliding with the plate surface of the collision plate 27, and is compressed to the highest degree at that time, and when it escapes to the downstream space, it turns into expansion, and by this compression and expansion, Some of the fine bubbles mixed and dissolved are first bubbled as microbubbles. The flow of the gas-liquid mixed fluid containing microbubbles is disturbed by passing through the collecting filter 31, and a further part of the mixed and dissolved fine bubbles are bubbled as microbubbles. A slit 29d is provided in the cylindrical member 29 between the filters 31, and a part of the flow passes through this to reach the outer peripheral gap 24a and returns to the original flow path. Aeration is promoted. Furthermore, when colliding with the end face 23, the bubbles are refined by the collision energy to become microbubbles, and the water flow which has lost its place and has a tendency to compress is ejected from the nozzle hole 26 to the outside, and the remaining fine bubbles are converted into microbubbles. Is made.

  The nozzle 12 for generating microbubbles is connected to the pipe line 13 by connecting portions 36c and 38c, and a casing 38 is provided as an outer case in which the nozzle body 20 for generating microbubbles is installed in combination with a block on the liquid supply side 36. And the interior space 39 of the casing 38 is filled with a fluid composed of microbubbles. By using the microbubble generating unit 12 having the nozzle body 20, microbubbles having a diameter in the range of 50 to 1 μm are efficiently generated as fine bubbles. The inventor can store a sterilizer containing slightly acidic hypochlorous acid water containing fine bubbles in a container in a state where carbon dioxide gas and nitrogen gas are contained in the fine bubbles, and in a sealed storage state. If so, it knows that it can maintain sterilization and cleaning ability for several tens of days and can be stored for a long time.

  The nanobubble generation unit 14 connected to the microbubble generation unit 12 having such a configuration basically includes a spiral flow path 15 wound in a spiral shape having a winding diameter and a winding number of a predetermined radius. It is characterized by having. That is, the gas-liquid mixed fluid that has passed through the upstream microbubble generating unit 12 and filled with microbubbles composed of microbubbles MB flows into the nanobubble generating unit 14 and passes through the spiral channel 15 while swirling. In the meantime, it is converted into nanobubble NB.

  The helical channel 15 is made of a synthetic resin tube, and the tube is formed by densely winding a continuous tube. In this case, “densely” refers to a state in which adjacent tubular bodies are wound in close contact with each other (see FIGS. 4 and 5). As described above, pipes made of metal, synthetic resin, or other materials can be used, and the spiral elements are wound at intervals like a compression coil spring. Can be selected as appropriate. The meaning that the winding diameter is a predetermined radius is not intended to be limited to a constant radius, so that the spiral-shaped flow path 15 in the present invention is also wound with a winding diameter changed such as a taper shape or a reverse taper shape. include.

The helical channel 15 shown as the embodiment is a tube made of a synthetic resin made of a helical element 15a, and has a constant radius r as a winding diameter and is wound by n turns. It is as follows when the example and conditions applied in embodiment are described.
a. Inner diameter of tube: 10 to 30 mm
b. Helical winding diameter r: 120-300mm
c. Total length of spiral part: 10-30m
In FIG. 5, 15 b is an upstream inflow port through which microbubbles flow in, and 15 c is a downstream outflow port through which nanobubbles flow out. In addition, the water flow containing a microbubble may be flowed in the reverse direction of the said inflow port 15b and the outflow port 15c.

  Furthermore, in the apparatus 10 of the present invention, the other end of the helical channel 15 in the nanobubble generator 14 is connected to a liquid tank 17 that stores nanobubbles, and the liquid in the liquid tank 17 and the gas-liquid mixed fluid generator 11 is used. The intake portion is connected by a pipe 18 and has a configuration in which the gas-liquid mixed fluid is circulated as a whole. By adopting a gas-liquid mixed fluid circulation configuration, the concentration of nanobubbles generated from a state where the amount of nanobubbles is zero can be improved. The circulation of the gas-liquid mixed fluid may cause impurities and the like to be mixed in the liquid flow. In order to remove this, the filter 19 is disposed in an appropriate pipe line.

  When the apparatus 10 of the present invention is operated, the gas-liquid mixed fluid generating unit 11 mixes the air taken in from the gas intake unit and the purified water taken in from the liquid intake unit, and the obtained gas-liquid mixed fluid is sent out from the pump. The The gas-liquid mixed fluid flows into the micro-bubble generating unit 12 through the pipe line 13, and the micro-bubble MB is generated by applying expansion, contraction, and stirring to the gas-liquid mixed fluid. 26 is ejected to the outside, that is, the internal space 39 of the nozzle device 40. The water flow containing the microbubbles MB flows into the nanobubble generation unit 14 through the pipe line 13 and swirls through the helical channel 15. Although the mechanism has not been clarified yet, the swirl in the spiral channel 15 causes an overflow, and this overflow forcibly reduces the microbubbles MB, resulting in a change to nanobubbles NB. Guessed.

  The helical channel 15 can be formed by winding a tube made of an arbitrary material, for example, a so-called vinyl pipe most simply by winding a predetermined radius around a predetermined number of times. Therefore, the apparatus 10 of this invention can be comprised at very low cost by utilizing the existing microbubble production | generation apparatus (For example, the gas-liquid mixed fluid production | generation part 11 and the microbubble production | generation part 12). Thus, the point that the apparatus 10 of the present invention is very easy to solve is to solve the conventional problem related to the nanobubble NB that has been considered difficult to generate.

  The gas-liquid mixed fluid containing the nanobubbles NB and the microbubbles MB generated by the nanobubble generating unit 14 by the above process is sent to the liquid tank 17 through the pipe line 16 and stored therein. The gas-liquid mixed fluid containing nanobubbles NB stored in the liquid tank 17 further flows into the liquid intake part of the gas-liquid mixed fluid generating unit 11 through the conduit 18 through the circulation path, and the above process is repeated. Concentration goes up gradually. On the other hand, the nanobubble water stored in the liquid tank 17 can be used for various purposes as it is.

  The apparatus 10 of the present invention configured with the above-described conditions a, b, and c generates nanobubbles NB, and in that case, ozone is mixed in the gas intake part at a concentration of 8 ppm, and the apparatus 10 is operated for 1 hour. When continued, the ozone concentration rose to 16 ppm. The gas-liquid mixed fluid containing the nanobubbles of ozone diffuses as a gas from the water surface due to the poor solubility of ozone (water), whereas in the nanobubbles NB generated by the apparatus 10 of the present invention, It is construed that the ozone concentration in the gas-liquid mixed fluid is increased. This can be said to be a secondary effect of the device 10 of the present invention.

The enumerated uses of the nanobubble-containing gas-liquid mixed fluid obtained by the apparatus 10 of the present invention are listed as follows.
1. Supply of nanobubble liquid for sterilization and washing of fresh food such as meat and fish and vegetables.
2. Supply of nano bubble liquid for sterilization and washing of sanitary piping for food.
3. Supply of nano bubble liquid to improve water quality.
4). Supply of nanobubble liquid for wastewater treatment.
5. Supply of nanobubble liquid into the pipelines of dental units, dialysis machines, medical equipment, etc.
6). Etching of the workpiece surface with nanobubble water containing ozone for plating pretreatment.
7). Etching of resin surface with nanobubble water containing ozone (pretreatment of printed wiring board, etc.).

It is a block diagram which shows an example of the nanobubble-izing apparatus of the microbubble which concerns on this invention. It is sectional drawing which shows an example of the nozzle body in the same as the above. It is sectional drawing which similarly shows an example of the part for microbubble production | generation used for the nanobubble-izing apparatus of the microbubble of this invention. It is a top view which shows an example of the helical flow path similarly used for the nanobubble-izing apparatus of the microbubble of this invention. It is a side view of a helical channel same as the above.

DESCRIPTION OF SYMBOLS 10 Microbubble nanobubble generation apparatus 11 Gas-liquid mixed fluid production | generation part 12 Microbubble production | generation part 13, 16, 18 Flow path 14 Nano bubble production | generation part 15 Spiral-shaped flow path 17 Liquid tank 19 Filter 20 Nozzle body 21 Nozzle case 22 Inlet 23 End face 24 Upstream chamber 25 Downstream chamber 26 Nozzle hole 27 Collision plate 28 Filter member 29 Cylindrical member 30 Expansion / shrinkage agitation part 31 Collective filter 32, 33 Spacer ring 34, 37 Coupling means 35 Trunk part 36 Fluid supply side 38 Casing 39 Internal empty Place

Claims (3)

A gas-liquid mixed fluid generating unit for mixing the gas taken in from the gas intake unit and the liquid taken in from the liquid intake unit, and sending out the obtained gas-liquid mixed fluid from the pump;
A microbubble generating unit having a nozzle hole that generates microbubbles by applying expansion, contraction, and stirring action to the gas-liquid mixed fluid; and
A nanobubble generator having a spiral flow path wound in a spiral shape having a predetermined radius and a winding number;
The micro-bubble generating unit is provided with a nozzle body, and the nozzle body has an inflow port into which a gas-liquid mixed fluid flows at one end, and a hollow nozzle case having an end surface with which the fluid collides at the other end, In order to resist the moving fluid from the inlet to the wall surface of the hollow nozzle case and to expand and contract the stirring part installed for stirring, and to eject the fluid after colliding with the end face to the outside The nozzle case has a nozzle hole formed in the peripheral surface so as to surround the end surface from the flow direction toward the outside, and the nozzle case has a coupling means with the fluid supply side on the outer peripheral surface on the inlet side, A part of the expansion / contraction stirring unit is pressed against the fluid supply side when coupled with the supply side, and the expansion / contraction stirring unit has a shape protruding in the fluid flow direction at the center. And a fibre made of elastic material. Has a coater member, between the filter member and the spacer ring has a structure of arranging the impingement plate having a small hole for passing after colliding fluid,
A microbubble nanobubble device configured to connect one end of the helical channel and a microbubble generating unit and to flow out nanobubbles from the other end of the helical channel. 2. The other end of the helical flow path in the nanobubble generating part is connected to a liquid tank for storing nanobubbles, and the liquid tank and the liquid intake part of the gas-liquid mixed fluid generating part are connected by a circulation path. The device for making nanobubbles into microbubbles as described. 2. The microbubble nanobubble device according to claim 1, wherein the helical flow path is made of a synthetic resin tube, and the tube is formed by densely winding a continuous tube.

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