Nanobubble water production device

Abstract

To provide a nanobubble water production apparatus for producing nanobubble water containing one billion or more nanobubbles with a particle diameter of smaller than 100 nm per cc.SOLUTION: Provided is a nanobubble water production apparatus for producing nanobubble water, including: a chamber part, in which pressurized-dissolution and multi-cyclone chambers are continuously connected to each other without radial gaps, with the larger inner diameter on an upper side and the smaller inner diameter on a lower side, with substantially cylindrical hollow portions in a vertical direction; a nanobubble water channel, which is a single channel consisting of three channels, one conical, one cylindrical, and one inverted conical, connected in a vertical direction from top to bottom in a state being internally installed in the chamber part; and a jetting part which injects a mixed fluid of liquid and gas into a lower circumferential wall of the chamber part in a circumferential and upward spiraling upward motion; wherein the gap between the inner peripheral surface of the cylinder part having a smaller inner diameter on the lower side of the chamber part and the outer peripheral surface of the substantially cylindrical middle cylindrical body is reduced.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nanobubble water producing device that produces nanobubble water, which is a liquid containing nanobubbles, which are fine bubbles. [Background technology]

[0002] Patent Document 1 discloses a fine bubble liquid manufacturing device that contains fine bubbles with a bubble diameter in the micrometer to nanometer range, and that includes a pump for drawing in gas and raw material liquid from a gas supply port, a pressure chamber for pressurizing the gas-liquid mixture of raw material liquid and gas that is pressure-fed by the pump, and a metal filter for reducing the bubble diameter in the gas-liquid mixture pressurized in the pressure chamber to fine bubbles with a diameter in the micrometer to nanometer range.The metal filter has a large number of fine pores opened in the same axial direction as the water flow direction, and the gas-liquid mixture passes through the fine pores, thereby reducing the bubble diameter.

[0003] Patent Document 2 discloses a nanobubble-producing apparatus comprising: a liquid vat having a bubble-containing-liquid inlet at its top and a bubble-containing-liquid outlet at its bottom; a microbubble-containing-liquid supply unit that supplies microbubble-containing liquid containing microbubbles to the bubble-containing-liquid inlet of the liquid vat; an ultrasonic collapse unit that irradiates ultrasonic waves into the liquid vat to form an ultrasonic collapse field where the collapse of microbubbles by ultrasonic waves occurs intensively at a location where the microbubble-containing liquid supplied into the liquid vat through the bubble-containing-liquid inlet flows downward, thereby generating nanobubbles; and a nanobubble-containing-liquid discharge unit that takes the nanobubble-containing liquid containing nanobubbles generated by the ultrasonic collapse unit out of the liquid vat through the bubble-containing-liquid outlet.

[0004] Patent Document 3 discloses a nanobubble generating nozzle including an introduction part that introduces a mixed fluid of a liquid and a gas into an interior thereof, a jetting part that feeds out the mixed fluid containing nanobubbles of the gas, and a nanobubble generating structure part that is located between the introduction part and the jetting part and that generates nanobubbles of the gas, wherein the nanobubble generating structure part has a plurality of flow paths having different cross-sectional areas that are arranged in a plurality of stages in the axial direction of the nanobubble generating nozzle, and the flow paths generate nanobubbles by utilizing the principle of pressurized dissolution. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6157688 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-186781 [Patent Document 3] Patent No. 6129390 Summary of the Invention [Problem to be solved by the invention]

[0006] The invention of Patent Document 1 is Fine Bubbles The amount of fine bubbles with an average bubble diameter of 154 nm per cc of liquid was 125 million / cc, and looking at the ratio of particle size to quantity shown in Figure 5, there was a problem in that only just under 40% of the bubbles were 100 nm or smaller in size.

[0007] The invention of Patent Document 2 is capable of producing a nanobubble-containing liquid NB that is fine, has a uniform diameter, and is highly concentrated. Specifically, the invention describes that a homogeneous nanobubble-producing device is realized in which microbubble-containing liquid MB with a diameter of about 200 nm to 2 μm is produced by a microbubble-containing liquid supply unit 3, and an ultrasonic collapse field is formed in the microbubble-containing liquid MB to further collapse the microbubble-containing liquid MB, thereby achieving a median diameter of about 100 nm or less and a bubble concentration of 300 million bubbles / ml or more. However, there is a problem in that the amount of nanobubbles with a diameter of less than 100 nm is small.

[0008] The invention of Patent Document 3 describes that nanobubbles with a diameter of approximately 100 nm were generated in the largest number, with approximately 400 million nanobubbles generated per cc. However, as shown in Figures 5 and 6, there was a problem in that the number of nanobubbles with a diameter of less than 100 nm was small.

[0009] The present invention was devised in light of these problems, and its objective is to provide a nanobubble water producing device that produces nanobubble water containing 1 billion or more nanobubbles with particle sizes of less than 100 nm per cc. [Means for solving the problem]

[0010] The method according to claim 1 Nanobubbles The water production device includes a gas supply unit, a liquid supply unit, a high-pressure pump that mixes gas from the gas supply unit with liquid from the liquid supply unit and delivers a mixed fluid pressurized to a predetermined pressure, a filtration filter that filters the mixed fluid from the high-pressure pump, a pressurized dissolution multi-cyclone chamber that produces nanobubble water containing nanobubbles from the filtered mixed fluid, and a discharge valve that discharges the produced nanobubble water. Nanobubblesa nanobubble water flow path formed within the chamber, which is formed by connecting three flow paths, each of which has a substantially conical shape, a substantially cylindrical shape, and a substantially inverted conical shape, in a vertically communicating state, to form a single flow path; and a nanobubble water flow path formed within the chamber, which connects three flow paths, each of which has a substantially conical shape, a substantially cylindrical shape, and a substantially inverted conical shape, in a vertically communicating state. The chamber includes an upper cylindrical chamber having the hollow having an opening only at its lower end, and a lower cylindrical chamber having a hollow having an opening only at its upper end and an inner diameter smaller than the inner diameter of the upper cylindrical chamber, at the lower end of the upper cylindrical chamber. The nanobubble water flow path forms a nanobubble water flow path formed within the chamber, which connects two substantially cylindrical hollow paths having different inner diameters in a vertically communicating state without any radial gaps. The nanobubble water flow path is provided at a height near the lower end surface of the upper cylindrical chamber or the upper end surface of the lower cylindrical chamber, and is characterized by comprising: a substantially cylindrical middle cylinder having a narrow gap between its outer peripheral surface and the inner peripheral surface of the chamber; a substantially conical upper cylinder placed on the upper edge of the middle cylinder and having a guide cylinder of a predetermined length and an inner diameter that is approximately the same as the inner diameter of the opening at the upper edge suspended from the upper edge, the upper cylinder having an inner diameter that increases downward; and a substantially inverted conical lower cylinder suspended from the lower edge of the middle cylinder, having an inner diameter that decreases downward, and a lower end opening formed at its lower end that penetrates the bottom wall of the lower cylindrical chamber.

[0011] The method according to claim 2 Nanobubbles The water production device according to claim 1 is characterized in that the height from the position of the injection portion of the lower cylindrical chamber to the upper end of the lower cylindrical chamber is set to a length that allows the bubbles contained in the injected mixed liquid to dissolve.

[0012] The method according to claim 3 NanobubblesThe water production apparatus according to claim 1 or 2 is characterized in that the horizontal cross-sectional area of ​​the inner peripheral surface of the upper cylindrical chamber is reduced relative to the horizontal cross-sectional area of ​​the annular gap between the inner peripheral surface of the upper end of the lower cylindrical chamber and the outer peripheral surface of the middle cylindrical body, and the dissolved gas is released from the mixed liquid in which bubbles are dissolved due to a pressure drop caused by the pressurization through the gap, Nanobubbles It is characterized in that the area is large enough to allow foaming.

[0013] The method according to claim 4 Nanobubbles The water production device according to claim 1 or 2 is characterized in that a circulation flow path is provided through which the mixed liquid ejected from the pressurized dissolution / multi-cyclone chamber flows upstream of the high-pressure pump. [Effects of the Invention]

[0014] The present invention Nanobubbles The water production device can produce nanobubble water by pressurizing and dissolving the liquid mixture made by pressurizing and mixing liquid and gas, and creating a cyclone vortex to produce nanobubble water containing nanobubbles. Nanobubbles Contains more than 10 billion particles per cc Nanobubbles This provides the effect of producing water.

[0015] Circulating the mixed liquid has the effect of generating a larger amount of nanobubbles with smaller particle diameters. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic explanatory diagram of a nanobubble water producing device of the present invention. [Figure 2] This is an explanatory diagram of the appearance of the pressurized dissolution / multi-cyclone chamber. [Figure 3] This is an explanatory diagram of the internal structure of the pressurized dissolution / multi-cyclone chamber. [Figure 4] Illustrative diagrams of each horizontal cross section in Figure 3, where (a) is an explanatory diagram of the A-A cross section of the boundary area between the lower cylindrical chamber section and the upper cylindrical chamber section, and (b) is an explanatory diagram of the B-B cross section near the injection port. [Figure 5] This is an explanatory diagram of the flow of mixed fluid and nanobubbles within the chamber part of the pressurized dissolution / multi-cyclone chamber. [Figure 6] FIG. 1 is an explanatory diagram of the flow of nanobubbles in the nanobubble water flow path of the pressurized dissolution / multi-cyclone chamber. [Figure 7] FIG. 1 is an explanatory diagram of components of a nanobubble water flow path. [Figure 8] 1 is a graph showing the measurement results of Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention Nanobubbles 1, the water production device 1 comprises a gas supply unit 21, a liquid supply unit 22, a high-pressure pump 23 that sucks in gas from the gas supply unit 21 and liquid from the liquid supply unit 22, mixes them, and delivers a mixed fluid at a predetermined pressure, a filtration filter 24 that filters the mixed fluid from the high-pressure pump 23, a pressurized dissolution / multi-cyclone chamber 2 that produces nanobubble water containing nanobubbles from the filtered mixed fluid, and a discharge valve 25 that discharges the produced nanobubble water. Furthermore, although not shown, the device also comprises an operation panel having a switch equipped with an inverter that can control the flow rate of the high-pressure pump 23, which controls the supply amount of nanobubble water. The nanobubble water discharged from the discharge valve 25 is stored in a water storage tank 48, or the nanobubble water is supplied from the discharge valve 25 to various devices. Nanobubbles Connected to the water supply pipe.

[0018] The gas supply unit 21 may be, for example, a device that generates gas, such as an oxygen generator, or a means that can supply gas, such as an atmospheric air intake tube, and a check valve 27, a gas negative pressure gauge 31, a gas flow meter 32, and a gas flow rate adjustment valve 36 are provided in a flow path 41 that connects to a flow path 42 that is provided downstream from the gas supply unit 21 and that has a high-pressure pump 23 that creates a negative pressure on the upstream side, to prevent backflow of gas. The gas pressure is detected by the gas negative pressure gauge 31, and the gas flow rate is adjusted by the gas flow rate adjustment valve 36, for example, a needle valve.

[0019] The liquid supply unit 22 may be any device capable of supplying or storing liquid such as tap water, and a water supply valve 33 for controlling the flow of liquid is provided in a flow path 42 located downstream from the liquid supply unit 22 to the high-pressure pump 23 that sucks in the liquid.

[0020] The high-pressure pump 23 is preferably a gas-liquid mixing pump that can suck in gas and liquid, pressurize them, and mix them. The gas and liquid are mixed by the gas-liquid mixing pump, and fine bubbles are generated by a swirling flow, and the mixed liquid is sent downstream.

[0021] The filter 24 preferably has a sieve of, for example, 5 μm, and removes solid matter such as dust suspended in the mixed liquid.

[0022] The discharge valve 25 is a device that discharges the nanobubble water generated in the pressurized dissolution / multi-cyclone chamber 2. The discharge valve 25 may be, for example, a flow rate adjustment valve that controls the flow of the discharged liquid. A discharge flow meter 35 is provided in a flow path 44 that connects the pressurized dissolution / multi-cyclone chamber 2 and the discharge valve 25.

[0023] In addition, a circulation flow path 45 is provided to allow the mixed liquid flowing out of the pressurized dissolution / multi-cyclone chamber 2 to flow upstream of the high-pressure pump 23. The nanobubble water generated in the pressurized dissolution / multi-cyclone chamber 2 flows out of the pressurized dissolution / multi-cyclone chamber 2, but the discharge of the nanobubble water is suppressed by the discharge valve 25 due to the water volume adjustment by the flow rate adjustment valve. The nanobubble water flows into the circulation flow path 45, which connects an arbitrary portion of the flow path 44 between the pressurized dissolution / multi-cyclone chamber 2 and the discharge flow meter 35 with an arbitrary portion of the flow path 42 provided upstream of the high-pressure pump 23 and downstream of the water supply valve 33 provided downstream from the liquid supply unit 22, and is circulated.

[0024] By causing the mixed liquid to flow and circulate within the circulation flow path 45, Nanobubbles The particle size can be further reduced, and Nanobubbles This can dramatically increase the number of occurrences.

[0025] The pressurized dissolution multi-cyclone chamber 2 comprises a chamber section 3 in which two roughly cylindrical hollow sections with different inner diameters are connected in a vertically communicating state with no radial gaps, and a nanobubble water flow path 4 in which three roughly conical, roughly cylindrical, and roughly inverted conical flow paths are connected in a vertically communicating state to form a single flow path within the chamber section 3. The chamber section 3 is also equipped with a pressure gauge 34 for measuring the high pressure inside the chamber section 3, and a safety valve 34a for use in the event that the pressure exceeds a predetermined pressure.

[0026] As shown in Figure 2 or 3, the chamber section 3 comprises an upper cylindrical chamber section 5 having a hollow section with an opening only at the lower end, and a lower cylindrical chamber section 6 having a hollow section at the lower end of the upper cylindrical chamber section 5 with an inner diameter smaller than the inner diameter of the upper cylindrical chamber section 5 and an opening only at the upper end, and as shown in Figure 4(b), an injection section 10 is provided on the peripheral wall of the lower cylindrical chamber section 6 to inject a mixed fluid of liquid and gas in a spiral upward direction in the circumferential direction.

[0027] The injection section 10 is located downstream of the filtration filter 24, and is the section where the mixed fluid of gas and liquid that is pressurized by the high-pressure pump 23 to generate fine bubbles and mixed, and then filtered by the filtration filter 24, flows into the chamber section 3. The injection section 10 is cylindrical, and the direction of the injection section 10 at the tip of the cylinder is such that the mixed fluid is injected circumferentially and diagonally upward onto the inner surface of the peripheral wall of the lower cylindrical chamber section 6.

[0028] 3 to 7, the nanobubble water flow path 4 is provided within the chamber 3. The nanobubble water flow path 4 is provided near the height of the lower end surface of the upper cylindrical chamber 5 or the upper end surface of the lower cylindrical chamber 6 in the height direction and includes: a substantially cylindrical middle cylinder 8 with a narrow gap between its outer circumferential surface and the inner circumferential surface of the chamber 3; a substantially conical upper cylinder 7 placed on the upper edge of the middle cylinder 8 and having a guide cylinder 12 of a predetermined length and an inner diameter substantially the same as the opening at the upper edge suspended from the upper edge; a substantially inverted conical lower cylinder 9 suspended from the lower edge of the middle cylinder 8 with an inner diameter gradually decreasing downward and a lower end opening formed at its lower end that penetrates the bottom wall of the lower cylindrical chamber 8; and a cylindrical outflow portion 11 with an inner diameter the same as the inner diameter of the opening at the lower end of the lower cylinder 9.

[0029] The radial gap between the lower cylindrical chamber 6 and the lower cylindrical body 9 has an inner diameter that decreases as the outer diameter of the lower cylindrical body 9 decreases downward, so that the gap narrows as it moves upward from the jetting portion 10, and as the mixed liquid containing the injected micro-bubbles rises in the spiral R, the pressure applied to the mixed liquid can be progressively increased, so that the micro-bubbles made by the high-pressure pump 23 are pressurized and dissolved by the pressurization. To perform this pressurized dissolution, the height from the position of the jetting portion 10 of the lower cylindrical chamber 6 to the upper end of the lower cylindrical chamber 6 is set to be longer than the length necessary for the bubbles to dissolve in the injected mixed liquid.

[0030] The outer diameter of the middle cylindrical body 8 is the same as the outer diameter of the upper edge of the lower cylindrical body 9, and the outer surface of the connecting portion between the middle cylindrical body 8 and the lower cylindrical body 9 is finished to a smooth surface. This prolongs the narrowest radial gap between the lower cylindrical chamber portion 6 and the middle cylindrical body 8, maintaining the pressurized dissolution state. The outer surface of the connecting portion between the outer peripheries of the upper cylindrical body 7 and the middle cylindrical body 8 is also finished to a smooth surface.

[0031] Next, when the pressurized and dissolved mixed liquid is flowed from the lower cylindrical chamber portion 6 to the upper cylindrical chamber portion 5, the pressure on the pressurized and dissolved mixed liquid is suddenly reduced by the narrow gap, and the pressurized and dissolved state is suddenly released, and ultrafine particles are formed. Nanobubbles will foam.

[0032] In order to suddenly bring the pressure to a released state, a space is required that can rapidly reduce the pressure. Therefore, the horizontal cross-sectional area of ​​the inner peripheral surface of the upper cylindrical chamber portion 5 is set to be larger than the horizontal cross-sectional area of ​​the annular gap between the inner peripheral surface of the upper end of the lower cylindrical chamber portion 6 and the outer peripheral surface of the middle cylindrical body 8. The gas is released from the mixed liquid that has been pressurized by the gap and has dissolved gas bubbles due to the pressure drop. Nanobubbles 4(a), the horizontal cross-sectional area S of the inner peripheral surface of the upper cylindrical chamber portion 5 is set to be about 10 to about 30 times, preferably about 15 to about 25 times, and more preferably about 18 to about 22 times the horizontal flow path cross-sectional area s of the annular gap between the inner peripheral surface of the upper end of the lower cylindrical chamber portion 6 and the outer peripheral surface of the middle cylindrical body 8.

[0033] As shown in Figure 5, the mixed liquid rises in the annular gap between the inner surface of the lower cylindrical chamber portion 6 and the outer surface of the middle cylindrical body 8, forming a spiral R vortex, and after flowing into the upper cylindrical chamber portion 5, it continues to rise in the same spiral R vortex.

[0034] The spiral R vortex flow in the annular gap between the inner circumferential surface of the lower cylindrical chamber 6 and the outer circumferential surface of the middle cylindrical body 8, that is, when the pressurized and dissolved mixed liquid continues to swirl in the spiral R in the wide cavity of the upper cylindrical chamber 5, the pressure is suddenly reduced. Nanobubbles A large number of vortices are generated, and a cyclone phenomenon occurs due to spiral R vortices in the wide hollow portion of the upper cylindrical chamber portion 5 having a wide inner diameter.

[0035] When the surface tension decreases, small bubbles are formed, and when the surface tension increases, large bubbles are formed. A liquid mixture containing large bubbles is lighter than a liquid mixture containing small bubbles.

[0036] Therefore, the central region of the cavity is filled with light particles, i.e., particles of large particle size. Nanobubbles The centrifugal separation concentrates the particles in the center, causing overcrowding, and the particles are small in size near the inner wall of the cavity, which has little effect on reducing weight. Nanobubbles When centrifuged, a liquid mixture containing a large amount of cellulose becomes over-concentrated on the outside.

[0037] In addition, the pressure in the upper cylindrical chamber 5 was suddenly reduced. Nanobubbles The cyclone phenomenon causes a mixture of the liquid and the bubbles containing the nanobubbles to swirl at high speed. The swirling flow generated by the high-speed swirling causes the bubbles and the liquid to move at high speed, and the boundary layer formed between the bubbles and the liquid becomes thinner, thereby promoting dissolution of the bubbles. This further increases the amount of nanobubbles generated during pressure reduction after the dissolution.

[0038] Next, the mixed liquid in the central region is preferentially sucked into the opening of the upper cylindrical body 7 located in the center, rather than the mixed liquid near the inner circumferential wall. Then, small bubbles near the inner circumferential wall of the upper cylindrical chamber 5 also flow in through the opening of the upper cylindrical body 7.

[0039] And the central area became overcrowded. Nanobubbles6, the nanobubble water containing the nanobubble particles flows downward from the opening at the top end of the substantially conical upper cylindrical body 7 of the nanobubble water flow path 4 into the interior of the nanobubble water flow path 4 while forming a spiral R vortex. When the nanobubble water starts to flow downward, it passes through the inside of a guide cylinder 12 of a predetermined length and having substantially the same inner diameter as the opening at the top end of the upper cylindrical body 7. Therefore, the guide cylinder 12 forms a flow that causes the nanobubble water to flow downward, making it easier to draw the nanobubble water from inside the upper cylindrical chamber 5 into the nanobubble water flow path 4.

[0040] The upper cylindrical body 7 has a generally conical shape with an inner diameter that increases downward, and the mixed liquid flows downward while swirling inside the cylindrical guide cylindrical body 12, which has an inner diameter that is generally the same as the small-diameter opening at the upper end. Therefore, the nanobubble water containing nanobubbles with a relatively large inner diameter in the central region is further pressurized and dissolved.

[0041] Next, when the liquid flows down into the middle cylinder 8, the inner diameter of the middle cylinder 8 suddenly increases, and the gas is released from the mixed liquid in which the bubbles have been pressurized and dissolved due to the reduced pressure, generating even finer nanobubbles.

[0042] As described above, the present invention Nanobubbles The water production device 1 performs pressurized dissolution, decompression, swirling flow, pressurized dissolution, and decompression, Nanobubbles This allows the nanobubbles to be made finer, and the number of nanobubbles contained in 1 cc of nanobubble water containing the nanobubbles can be increased.

[0043] Then, when the discharge water volume is adjusted by the discharge valve 25 and the flow rate adjustment valve 26 provided in the circulation flow path 45 is opened, the nanobubble water flowing out of the pressurized dissolution / multi-cyclone chamber 2 is separated into nanobubble water to be discharged to the outside and nanobubble water to be flowed back into the high-pressure pump 23. By circulating the nanobubble water in the circulation flow path 45 and performing pressurized dissolution, decompression, swirling flow, pressurized dissolution and decompression again, Nanobubbles can be further refined, NanobubblesThis can further increase the number of nanobubbles contained in 1cc of nanobubble water containing this.

[0044] Next, when the generated nanobubble water is to be used, the discharge valve 25 is adjusted to a predetermined amount of water while checking the pressure and flow rate with the pressure gauge 34 that measures the pressure inside the chamber portion 3 and the discharge flow meter 35, and the hollow portion is connected to the lower side of the lower end of the lower cylindrical body 9 so that it communicates with the lower end of the lower cylindrical body 9. The nanobubble water containing nanobubbles is discharged from the outlet 11 that penetrates the bottom wall of the lower cylindrical chamber portion 6, flows through the flow path 44, and is discharged from the discharge valve 25. The water is then temporarily stored in, for example, a sealed water storage tank 48 for use, or the piping downstream of the discharge valve 25 is connected to equipment for providing water for hydroponic cultivation of vegetables and fruits, drinking water for livestock, or the like for use.

[0045] Next, Nanobubbles The following describes how to use the water production device 1. First, open the water supply valve 33 from the liquid supply unit 22, for example, a water tank containing tap water or groundwater, and turn on the on / off switch of the high-pressure pump 23 on the control panel to suck in the liquid.

[0046] Next, the pressure gauge 34 of the pressurized dissolution / multi-cyclone chamber 2 indicates 500 KPa, and the flow path 44 Nanobubbles The discharge valve 25 is adjusted so that the discharge rate of water becomes 100 L / min.

[0047] Next, the pressure in the flow path 41 becomes negative due to the operation of the high-pressure pump 23, and atmospheric air is sucked in from the gas supply unit 21. Therefore, when the pressure of the gas flowing in from the gas supply unit 21 is in a state where the gas negative pressure gauge 31 indicates a negative pressure of -20 KPa, the gas flow control valve 36, which is a needle valve, is adjusted so that the gas flow meter 32 indicates 1.6 L / min.

[0048] Next, a portion of the mixed liquid flowing out of the pressurized dissolution / multi-cyclone chamber 2 is sent upstream of the high-pressure pump 23 by adjusting the flow rate adjustment valve 26 of the flow path 45, thereby circulating the mixed liquid. In this state, the discharge valve 25 and the flow rate adjustment valve 26 are adjusted so that the pressure inside the pressurized dissolution / multi-cyclone chamber 2 matches 500 KPa as indicated by the pressure gauge 34 and the discharge rate indication on the discharge flow meter 35 matches 100 L / min.

[0049] Here, by circulating the mixed liquid, the particle size of the bubbles in the mixed liquid is further reduced. Nanobubbles It is possible to produce nanobubble water containing more of these.

[0050] And the above Nanobubbles The water producing device 1 is operated for a predetermined time, thereby making it possible to produce nanobubble water containing more fine bubbles by discharging the nanobubble water from the discharge valve 25.

[0051] Next, Example 1 will be described. Nanobubbles Water generator 1 was operated for 30 minutes to generate water. Nanobubbles Water was discharged, and the particle size and number of nanobubbles generated were measured using the nanoparticle video measurement system.

[0052] The measurements were performed using a nanoparticle video measurement system (NP-NEX, manufactured by Biomolecular Measurement Laboratory Co., Ltd.), which is a measuring instrument capable of measuring the particle size and number of nanobubbles contained in nanobubble water, and the results shown in Table 1 or FIG. 8 were obtained.

[0053] [Table 1]

[0054] Table 1 and Figure 8 show data indicating the size of the generated nanobubbles, ranging from 1 to 100 nm, and it is clear that nanobubbles with a size of 40 nm or less are the main component of nanobubble water. NanobubblesIt is clearly shown that nanobubbles with diameters of 1 to 5 nm are generated in the nanobubble water. Furthermore, the measurement values ​​in Table 1 and Fig. 8 show that, for example, 2.7 x 100 billion nanobubbles with diameters of 1 to 5 nm are generated per cc, and that nanobubbles with smaller diameters than those in Patent Documents 1 to 3 are generated in quantities several times greater than those in Patent Documents 1 to 3. [Explanation of symbols]

[0055] 1 Nanobubbles water production equipment 2. Pressurized dissolution and multi-cyclone chamber 3. Chamber section 4 Nanobubble water flow path 5 Upper cylindrical chamber 6 Lower cylindrical chamber 7 Upper cylinder 8 Middle cylindrical body 9 Lower cylindrical body 10 Injection part 11 Outflow section 12 Guide cylinder 21 Gas supply section 22 Liquid supply section 23 High-pressure pump 24 Filtration filter 25 Discharge valve 26 Flow control valve 27 Check valve 31 Gas negative pressure gauge 32 Gas flow meter 33 Water supply valve 34 Pressure gauge 34a Safety valve 35 Discharge flow meter 36 Gas flow control valve 41 Flow path 42 Flow path 43 Flow path 44 Flow path 45 Circulation channel 48 Water Tank R spiral S cross-sectional area s Flow path cross-sectional area

Claims

1. A nanobubble water producing device comprising: a gas supply unit; a liquid supply unit; a high-pressure pump that mixes gas from the gas supply unit with liquid from the liquid supply unit and delivers a mixed fluid pressurized to a predetermined pressure; a filtration filter that filters the mixed fluid from the high-pressure pump; a pressurized dissolution / multi-cyclone chamber that produces nanobubble water containing nanobubbles from the filtered mixed fluid; and a discharge valve that discharges the produced nanobubble water, The pressurized dissolution / multi-cyclone chamber is The nanobubble water flow path is provided in the chamber, and is formed by connecting three flow paths, each of which has a substantially conical shape, a substantially cylindrical shape, and a substantially inverted conical shape, in a vertically communicating state to form a single flow path. the chamber section comprises an upper cylindrical chamber section in which the hollow section having an opening only at the lower end is formed, and a lower cylindrical chamber section in which a hollow section having an inner diameter smaller than the inner diameter of the upper cylindrical chamber section is formed at the lower end of the upper cylindrical chamber section and having an opening only at the upper end, and an injection section is provided that injects a mixed fluid of liquid and gas into the peripheral wall of the lower cylindrical chamber section in a spiral upward direction in the circumferential direction, the nanobubble water flow path is provided near the height of the lower end surface of the upper cylindrical chamber or the upper end surface of the lower cylindrical chamber in the height direction, and comprises: a substantially cylindrical middle cylinder with a narrow gap between its outer peripheral surface and the inner peripheral surface of the chamber; a substantially conical upper cylinder placed on the upper edge of the middle cylinder and having a guide cylinder of a predetermined length suspended from the upper edge, the upper cylinder having an inner diameter that is gradually increasing downward; and a substantially inverted conical lower cylinder suspended from the lower edge of the middle cylinder, the inner diameter of which is gradually decreasing downward, and having a lower end opening formed at its lower end that penetrates the bottom wall of the lower cylindrical chamber.

2. The nanobubble water producing device according to claim 1, characterized in that the height from the position of the injection part of the lower cylindrical chamber to the upper end of the lower cylindrical chamber is set to a length that allows dissolution of bubbles contained in the injected mixed liquid.

3. 3. The nanobubble water producing device according to claim 1 or 2, wherein the horizontal cross-sectional area of ​​the inner peripheral surface of the upper cylindrical chamber relative to the horizontal cross-sectional area of ​​the annular gap between the inner peripheral surface of the upper end of the lower cylindrical chamber and the outer peripheral surface of the middle cylindrical body is set to an area in which dissolved gas is released from the mixed liquid pressurized by the gap and dissolves bubbles due to a pressure drop, enabling nanobubbles to form.

4. 3. The nanobubble water producing device according to claim 1, further comprising a circulation flow path for circulating the mixed liquid ejected from the pressurized dissolution / multi-cyclone chamber upstream of the high-pressure pump.

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