Nano-bubble water generation device

Abstract

To provide a nano-bubble water generation device which can generate a large number of nano-bubbles and control the number of nano-bubbles in nano-bubble water which is expected to have effect in various fields.SOLUTION: A nano-bubble water generation device 10 includes: a closed tank 1; a supply path 2 configured to supply a compressed gas and water to the closed tank 1; and a water sending path 3 which pumps nano-bubble water 11 generated in the closed tank to send the nano-bubble water to the outside of the closed tank. The water sending path 3 is provided with, at a middle part thereof, a compressed gas intake part 21 which adjusts an amount of a compressed gas 12 in the closed tank as intake air and takes the compressed gas into the nano-bubble water in the water sending path. Further, at an end 3a of the water sending path, a discharge nozzle 22 which refines the compressed gas taken from the compressed gas intake part 21 into the water sending path to generate nano-bubbles and discharges nano-bubble water 23 to the outside of the closed tank. The nano-bubble water generation device is configured to have the above-described structure to achieve the above-described object.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a nanobubble water generator, and more specifically, to a nanobubble water generator that can generate a large number of nanobubbles and control the number of nanobubbles in nanobubble water, which is expected to be effective in a variety of fields. [Background technology]

[0002] Liquids containing fine (also called "micro") bubbles are expected to be used in various industrial fields, and in recent years, various means for generating fine bubbles have been proposed. Among the generated bubbles, those with a size of 1 to 100 μm are called microbubbles (also simply called "nanobubbles"). The following prior art has been proposed as a means for generating such nanobubbles.

[0003] For example, Patent Document 1 proposes a micro-nano bubble generating system that improves the service life of a pressure pump and the generation efficiency of micro-nano bubbles. In this technology, a first water supply pipe and a first drain pipe are connected to a first pressure pump, a mixing tank is connected to the end of the first drain pipe far from the first pressure pump, a second drain pipe is connected to the mixing tank, an intake section is provided in the first water supply pipe, a regulating valve is provided for controlling the flow rate of water in the first water supply pipe, a second water supply pipe is connected to the first water supply pipe, a second pressure pump is connected to the end of the second water supply pipe far from the first water supply pipe, the second pressure pump communicates with the first drain pipe via a third drain pipe, the second water supply pipe communicates with the second drain pipe via a return pipe, and a second check valve is provided in the return pipe to prevent water flow from the first water supply pipe through the return pipe to the second drain pipe.

[0004] Patent Document 2 proposes a gas-liquid reaction apparatus capable of performing a large-scale, efficient gas-liquid reaction on an industrial scale. In this technology, a micro-nano bubble generator is provided in the reaction tank of the gas-liquid reaction apparatus, and the micro-nano bubble generator generates micro-nano bubbles of the reactant gas present in the gas phase of the reaction tank in the reactant-containing liquid present in the liquid phase of the reaction tank. In addition, a liquid flow type micro-nano bubble generator is used, and the reactant-containing liquid present in the liquid phase of the reaction tank is pressurized and supplied, and the reactant gas is sucked from the gas phase of the reaction tank by negative pressure suction.

[0005] Patent Document 3 proposes a nanobubble generator capable of continuously generating nanobubbles. This technology includes a flow path, a water intake, a pressurizing pump, a gas intake regulating valve, a bubble water pressurizing tank, a pressure reducing and discharge valve, a bubble vibration collapse flow path, and a discharge port, the pressurizing pump pressurizes water containing electrolyte ions to a first pressure and sends it, the gas intake regulating valve supplies gas into the flow path, the bubble water pressurizing tank pressurizes the pressurized water and gas to a second pressure lower than the first pressure, the pressure reducing and discharge valve reduces the pressure of the water and gas pressurized to the second pressure, the bubble vibration collapse flow path vibrates the reduced pressure water and gas, the discharge port discharges the water and gas vibrated in the bubble vibration collapse flow path, and the diameter of the flow path in the bubble vibration collapse flow path is smaller than the diameter of the flow path between the pressure reducing and discharge valve and the bubble vibration collapse flow path.

[0006] Patent Document 4 also proposes a nanobubble generator that can easily control the conditions for generating nanobubbles and the diameter of nanobubbles. In this technology, a pressurizing pump pressurizes water and gas supplied into a flow path to a first pressure and sends out a pressurized mixed water in which water and gas are mixed into the flow path, a pressurized dissolved water holding chamber maintains the pressurized mixed water at the first pressure and holds the pressurized dissolved water in which gas is dissolved in water, a decompression chamber decompresses the pressurized dissolved water to a second pressure lower than the first pressure, a rotating shaft is disposed so as to pass through the pressurized dissolved water holding chamber and an opening and reach the decompression chamber, a rotating blade body is attached to the tip of the rotating shaft and disposed in the decompression chamber, and has a single-strand worm shape, a motor rotates the rotating shaft, and a discharge pipe discharges water and gas from the decompression chamber. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 7202584 [Patent Document 2] JP 2017-213519 A [Patent Document 3] JP 2011-20005 A [Patent Document 4] JP 2013-107060 A Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention is an apparatus for generating nanobubbles by a new means different from the techniques proposed in the above-mentioned Patent Documents 1 to 4, and its object is to provide a nanobubble water generator that can generate a large number of nanobubbles and control the number of nanobubbles for nanobubble water, which is expected to be effective in various fields. [Means for solving the problem]

[0009] The nanobubble water generating device according to the present invention is a nanobubble water generating device having a sealed tank, a supply path for supplying pressurized gas and water to the sealed tank, and a water supply path for pressurizing and sending the nanobubble water generated in the sealed tank to the outside of the sealed tank, wherein the water supply path is provided with a pressurized gas intake unit in the middle thereof for suctioning and adjusting the pressurized gas in the sealed tank and taking it into the nanobubble water in the water supply path, and is provided with a discharge nozzle at one end thereof for generating nanobubbles by micronizing the pressurized gas taken into the water supply path from the pressurized gas intake unit and discharging the nanobubble water outside the sealed tank.

[0010] According to this invention, a pressurized gas intake section is provided midway through the water supply path, which adjusts the intake of pressurized gas in the sealed tank and takes it into the nanobubble water in the water supply path, so that the amount of gas in the nanobubble water pressure-fed through the water supply path can be adjusted by adjusting the intake. Also, a discharge nozzle is provided at the end of the water supply path, which atomizes the pressurized gas taken into the water supply path from the pressurized gas intake section to generate nanobubbles and discharges the nanobubble water out of the sealed tank, so that the nanobubbles in the nanobubble water can be further increased by the discharge nozzle. As a result, a large number of nanobubbles can be generated in the nanobubble water, and the number of nanobubbles can be adjusted.

[0011] In the nanobubble water generating device according to the present invention, the pressurized gas intake unit is disposed above the water surface of the nanobubble water, and the intake adjustment unit includes an intake port diameter variable device having an intake port for drawing in the pressurized gas in the sealed tank. According to this invention, the intake adjustment unit includes an intake port diameter variable device having an intake port for drawing in the pressurized gas in the sealed tank, and the amount of gas in the nanobubble water pressurized through the water supply path can be adjusted by manually or automatically varying the diameter of the intake port of the intake port diameter variable device.

[0012] In the nanobubble water generating apparatus according to the present invention, the supply path includes a pressurized gas supply path that supplies the pressurized gas to the sealed tank, and a water supply path that supplies the water to the sealed tank.

[0013] In the above case, a pressurizing nozzle is connected to the pressurized gas supply path, which further pressurizes the pressurized gas and supplies it to the water in the sealed tank. According to this invention, the pressurized gas is further pressurized and atomized by the pressurizing nozzle, so that a larger number of nanobubbles can be generated in the water in the sealed tank.

[0014] In the nanobubble water generating device according to the present invention, a second sealed tank different from the sealed tank is provided, nanobubble water is circulated through the water supply path that pressure-feeds the nanobubble water in the sealed tank into the second sealed tank and another water supply path that pressure-feeds the nanobubble water in the second sealed tank into the sealed tank, and a discharge nozzle that discharges the nanobubble water into the second sealed tank is provided at the end of the water supply path that pressure-feeds the nanobubble water from the sealed tank into the second sealed tank. According to this invention, the number of nanobubbles can be further increased by circulating the nanobubble water in the sealed tank and the nanobubble water in the second sealed tank.

[0015] In the nanobubble water generating device according to the present invention, two or more other sealed tanks are arranged to be connected to the sealed tank. According to this invention, the number of other sealed tanks may be one, but by arranging two or more, the nanobubble water can be circulated to further increase the number of nanobubbles. Also, the number of nanobubbles in each sealed tank can be changed. Effect of the Invention

[0016] According to the present invention, it is possible to provide a nanobubble water generating device capable of generating a large number of nanobubbles and controlling the number of nanobubbles. As a result, nanobubble water can be utilized in various fields such as cleaning, beauty, agriculture, and medicine, and the effects thereof can be expected. In particular, in the present invention, a pressurized gas intake section is provided in the middle of the water supply path, which adjusts the intake of pressurized gas in a sealed tank and takes it into nanobubble water, so that the amount of gas in the nanobubble water pressure-fed through the water supply path can be adjusted by adjusting the intake. Also, at the end of the water supply path, a discharge nozzle is provided that atomizes the taken-in pressurized gas to generate nanobubbles and discharges the nanobubble water outside the sealed tank, so that the number of nanobubbles in the nanobubble water can be increased by the discharge nozzle. In this way, it is possible to generate a large number of nanobubbles in the nanobubble water and adjust the number of nanobubbles. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a configuration diagram showing an example of a nanobubble water generating device according to the present invention. [Diagram 2] FIG. 1 is a configuration diagram showing an example of a nanobubble water generator composed of one sealed tank. [Diagram 3] FIG. 1 is a configuration diagram showing an example of a nanobubble water generator to which a second sealed tank is connected. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The nanobubble water generating device according to the present invention will be described with reference to the drawings. Note that the following embodiment is an example of the technical idea of ​​the present invention, and the technical scope of the present invention is not limited to the following description and drawings, but includes inventions with similar technical ideas.

[0019] As shown in Figs. 1 to 3, a nanobubble water generator 10 according to the present invention has a sealed tank 1, a supply path 2 (2a, 2b) for supplying pressurized gas and water to the sealed tank 1, and a water supply path 3 for pressurizing and sending nanobubble water 11 generated in the sealed tank to the outside of the sealed tank. The water supply path 3 is characterized in that a pressurized gas intake unit 21 is provided midway along the water supply path 3, which intakes and adjusts the pressurized gas 12 in the sealed tank and takes it into the nanobubble water in the water supply path 3, and a discharge nozzle 22 is provided at an end 3a of the water supply path 3, which atomizes the pressurized gas taken into the water supply path 3 from the pressurized gas intake unit 21 and discharges nanobubble water 23 outside the sealed tank.

[0020] In this nanobubble water generator 10, a pressurized gas intake section 21 is provided in the middle of the water supply path 3, which adjusts the intake of the pressurized gas 12 in the sealed tank and takes it into the nanobubble water in the water supply path 3, so that the amount of gas in the nanobubble water pressure-fed through the water supply path can be adjusted by adjusting the intake. In addition, a discharge nozzle 22 is provided at the end of the water supply path 3, which generates nanobubbles by finely atomizing the pressurized gas taken into the water supply path from the pressurized gas intake section 21 and discharges the nanobubble water outside the sealed tank, so that the number of nanobubbles in the nanobubble water can be increased by the discharge nozzle 22. As a result, a large number of nanobubbles can be generated in the nanobubble water, and the number of nanobubbles can be adjusted. According to the present invention, a nanobubble water generator that can generate a large number of nanobubbles and control the number of nanobubbles can be provided. As a result, nanobubble water can be used in various fields such as cleaning, beauty, agriculture, and medicine, and the effects of this can be expected.

[0021] In the present invention, the term "nanobubbles" refers to minute spherical bubbles contained in a liquid. These nanobubbles are nanobubbles with a diameter of less than 1 μm, and the nanobubble water generator 10 can be preferably used as a generator of such nanobubbles.

[0022] Each component will be described in detail.

[0023] (sealed tank) The sealed tank 1 is a sealed tank into which pressurized gas and water are supplied to generate nanobubble water. Since the pressurized gas is supplied to the sealed tank 1, it is preferable that the sealed tank 1 is a pressure vessel or the like that can withstand such pressure. The material of the sealed tank 1 is not particularly limited, but it is preferable that the sealed tank 1 is made of a general stainless steel material. As shown in FIG. 1, the sealed tank 1 is connected to a pressurized gas supply path 2a that supplies pressurized gas and a water supply path 2b that supplies water, each via a sealant 8. The sealant 8 is not particularly limited, but can be made of any combination of a socket, a water leakage seal tape, a packing, etc. The second sealed tank 31 described later can also be made of the same material.

[0024] (Supply Channel) 1 to 3, the supply path 2 can be a pressurized gas supply path 2a that supplies pressurized gas to the sealed tank 1, and a water supply path 2b that supplies water to the sealed tank 1. It is preferable that a control valve 7 such as an electromagnetic valve is provided midway along each of the supply paths 2a and 2b to control the supply. A pressurized air generator 5 and gas cylinders for various gases are connected to the pressurized gas supply path 2a, and a water storage container, water pipes, etc. are connected to the water supply path 2b.

[0025] Examples of the pressurized gas include air, oxygen, carbon dioxide, nitrogen, hydrogen, or a mixed gas selected from these, which is pressurized. Nanobubble water is generated by supplying these pressurized gases into water. Examples of the pressurized gas include gases pressurized by a pressurizing means and gases filled in advance at high pressure. For example, air can be brought to a predetermined pressurized state by a pressurized air generator 5 (compressor) or the like. In addition, for oxygen, carbon dioxide, nitrogen, hydrogen, or a mixed gas, pressurized gases filled with each gas at high pressure can be applied. The pressure of the pressurized gas varies depending on the type of gas and is not particularly limited, but for example, in the case of pressurized air, it is preferable to set it within the range of 0.1 to 1.0 MPa.

[0026] The water is selected depending on the use of the nanobubble water, and examples of the water include pure water, ion-exchanged water, distilled water, natural water, and tap water.

[0027] The end of the piping of the pressurized gas supply path 2a is disposed at a position where it is submerged in the water in the sealed tank 1. By supplying the pressurized gas into the water at this position, nanobubble water 11 containing fine nanobubbles can be generated. A pressurized nozzle 4 may be connected to the end of the pressurized gas supply path 2a as necessary. This pressurized nozzle 4 is also disposed at a position where it is submerged in the water. The pressurized nozzle 4 can further increase the pressure of the pressurized gas, so that nanobubble water 11 with an increased number of nanobubbles can be generated. By providing such a pressurized nozzle 4, a large number of nanobubbles can be generated in the water in the sealed tank 1. The degree of increase in the number of nanobubbles varies depending on the configuration of the pressurized nozzle 4, but for example, the number of nanobubbles can be increased by about 10 to 20% compared to the case where the pressurized nozzle 4 is not provided.

[0028] (Water supply route) The water supply path 3 is a path for pressurizing and sending the nanobubble water 11 generated in the sealed tank 1 out of the sealed tank. Here, "pressurized" means that the nanobubble water 11 is sent in a pressurized state. A pressurized gas intake unit 21 is provided midway along the water supply path 3, which adjusts the intake of the pressurized gas in the sealed tank 1 and takes it into the nanobubble water 11 in the water supply path 3. A discharge nozzle 22 is provided at an end 3a of the water supply path 3, which atomizes the pressurized gas taken into the water supply path 3 from the pressurized gas intake unit 21 to increase the number of nanobubbles and discharges the nanobubble water 11 out of the sealed tank.

[0029] (Pressurized gas intake) The pressurized gas 12 in the sealed tank 1 is taken in through an intake port 24 provided in the pressurized gas intake unit 21. The intake port 24 of the pressurized gas intake unit 21 is disposed above the water surface of the nanobubble water 11 in the sealed tank 1. The intake adjustment (also referred to as an intake adjustment device) is provided with an intake port diameter variable device (not shown) having an intake port 24 that draws in the pressurized gas in the sealed tank, and the intake adjustment is performed by changing the diameter of the intake port 24 with the intake port diameter variable device. The diameter of the intake port 24 is not particularly limited, but it is preferable to provide a plurality of intake ports 24 with diameters in the range of, for example, 0.1 to 5.0 mm in a stepped manner. The intake port diameter variable device can adjust the amount of gas in the nanobubble water to be pumped through the water supply path 3 by manually or automatically varying the diameter of the intake port 24. The manual variation is not particularly limited, but can be performed, for example, by removing one of the sealing members of the multiple intake ports 24 with different diameters sealed with a sealing member. The automatic variation is also not particularly limited, but can be performed, for example, by electrically opening one of the sealing members of the intake ports 24 sealed with a sealing member. Alternatively, the intake port diameter variable device may be one in which several intake ports 24 of different sizes are provided in one intake port part, and the diameter can be changed to any desired value.

[0030] (Discharge nozzle) The discharge nozzle 22 is provided at the end of the water supply path 3 and discharges the nanobubble water 11 outside the sealed tank. The discharge nozzle 22 generates nanobubbles by atomizing the pressurized gas that has been taken into the water supply path 3 from the pressurized gas intake section 21 and has an increased amount of gas. The discharge nozzle can increase the number of nanobubbles in the nanobubble water. As a result, a large number of nanobubbles can be generated in the nanobubble water, and the number of nanobubbles can be adjusted. The discharge nozzle 22 is provided with a nozzle of, for example, about 0.5 to 3 mm in size in order to atomize the gas in the nanobubble water 11 that is pressure-fed through the water supply path 3 and the gas taken in from the pressurized gas intake section 21, and the gas pressure-fed through the water supply path 3 and the gas taken in are atomized by the nozzle. The size and number of the nozzle of the discharge nozzle are not particularly limited. By providing such a discharge nozzle 22, even more nanobubbles can be generated in the nanobubble water 11 in the water supply path 3. The degree of increase in the number of nanobubbles in the discharge nozzle 22 varies depending on the configuration of the discharge nozzle 22, but for example, the number of nanobubbles being pressure-fed through the water supply path 3 can be increased by about 10 to 20%.

[0031] (Second sealed tank) The number of sealed tanks may be one as shown in Fig. 2, or two (or more) as shown in Fig. 3. The nanobubble water generator 10 (10B) shown in Fig. 3 has a second sealed tank 31 different from the sealed tank 1. Between the sealed tank 1 (also referred to as the first sealed tank) and the second sealed tank 31, there are disposed a water supply path 3 for pressure-feeding the nanobubble water 11 in the sealed tank 1 into the second sealed tank 31, and another water supply path 3' for pressure-feeding the nanobubble water 41 in the second sealed tank 31 into the sealed tank 1, and the nanobubble water can be circulated by the water supply paths 3, 3'.

[0032] Furthermore, the second sealed tank 31 is provided with a discharge nozzle 22 at the end of the water supply path 3 that pressure-feeds the nanobubble water 11 from the sealed tank 1 into the second sealed tank 31, for discharging the nanobubble water 11 into the second sealed tank 31. The discharge nozzle 22 here is the same as that described above, and is therefore given the same reference numeral 22. In this way, by circulating the nanobubble water 11 in the sealed tank 1 and the nanobubble water 41 in the second sealed tank 31, the number of nanobubbles can be further increased. Furthermore, the second sealed tank 31 is provided with a discharge nozzle 22 that discharges the nanobubble water 41 out of the second sealed tank 31, and the nanobubble water 51 that has passed through the discharge nozzle 22 can be sent out of the second sealed tank 31.

[0033] As shown in Fig. 3, the water supply paths 3, 3' are each provided with a pressurized gas intake unit 21 and a control valve 7. The pressurized gas intake unit 21 controls the intake to adjust the intake air and further increase the number of nanobubbles when circulating the nanobubble water that is pressurized through each water supply path 3, 3'. The control valve 7 controls when to start or stop the supply of the nanobubble water that is pressurized through each water supply path 3, 3'.

[0034] 3, one other sealed tank (second sealed tank 31) is added to the sealed tank 1, but two or more other sealed tanks may be provided. By providing two or more other sealed tanks, the nanobubble water can be circulated between the sealed tanks as desired to further increase the number of nanobubbles, and the number of nanobubbles can be changed in each sealed tank.

[0035] As described above, the nanobubble water generator 10 according to the present invention can generate a large number of nanobubbles and can also provide a nanobubble water generator that can control the number of nanobubbles. The nanobubble water generator 10 according to the present invention is equipped with a pressurized gas intake unit 21 provided midway through the water supply path 3 and a discharge nozzle 22 provided at the end of the water supply path 3, and can efficiently generate nanobubble water containing about 1 to 10 billion nanobubbles per mL. Furthermore, by adjusting the intake of the pressurized gas intake unit 21, the nanobubbles can be changed within a range of about 1 to 10 billion nanobubbles per mL.

[0036] The nanobubble water generated by the nanobubble water generator 10 can be utilized in various fields such as cleaning, beauty, agriculture, and medicine, and the effects thereof can be expected. For example, the nanobubble water generator 10 is expected to be preferably applied to cleaning-related fields, beauty-related fields, agriculture-related fields, medicine-related fields, etc. It is also expected to be used in industrial fields such as food-related fields, pharmaceutical-related fields, cosmetics-related fields, electronic devices such as solar cells, secondary batteries, and semiconductor devices, and functional materials. [Explanation of symbols]

[0037] 1. Sealed tank (No. 1 sealed tank) 2. Supply Channel 2a Supply path for supplying pressurized gas 2b Water supply route 3 Water supply route 3a End of water supply path 4 Pressure nozzle (first pressure nozzle) 5. Compressor 6. Water Supply 7. Control valve 8 Sealing materials for sealed tanks 10 Nanobubble water generator 10A Nanobubble water generator with sealed tank 10B Nanobubble water generating device equipped with second sealed tank 11 Nanobubble water in a sealed tank 12 Pressurized gas in a closed tank 21 Pressurized gas intake 22 Discharge nozzle 23 Pumping nanobubble water 24 Air Intake 31 Second Closed Tank 33 Pressurized gas supply line 41 Nanobubble water in the second sealed tank 42 Pressurized gas in second sealed tank 51 Pumping nanobubble water

Claims

1. A nanobubble water generating device having a sealed tank, a supply path for supplying pressurized gas and water to the sealed tank, and a water supply path for pressurizing and sending nanobubble water generated in the sealed tank to the outside of the sealed tank, The nanobubble water generating device is characterized in that the water supply path is provided with a pressurized gas intake unit midway along the water supply path, which intakes and adjusts the pressurized gas in the sealed tank and takes it into the nanobubble water in the water supply path, and at one end of the water supply path is provided a discharge nozzle that atomizes the pressurized gas taken into the water supply path from the pressurized gas intake unit to generate nanobubbles and discharges the nanobubble water outside the sealed tank.

2. 2. The nanobubble water generating apparatus according to claim 1, wherein the pressurized gas intake section is disposed above the water surface of the nanobubble water, and the intake adjustment section includes an intake port diameter variable device having an intake port for drawing in the pressurized gas in the sealed tank.

3. 3. The nanobubble water generating apparatus according to claim 1, wherein the supply path includes a pressurized gas supply path that supplies the pressurized gas to the sealed tank, and a water supply path that supplies the water to the sealed tank.

4. The nanobubble water generating device according to claim 3 , wherein a pressurizing nozzle that atomizes the pressurized gas and supplies the atomized gas to the water in the sealed tank is connected to the pressurized gas supply path.

5. 3. The nanobubble water generating device according to claim 1 or 2, further comprising a second sealed tank different from the sealed tank, nanobubble water is circulated through the water supply path that pressure-feeds the nanobubble water in the sealed tank into the second sealed tank and another water supply path that pressure-feeds the nanobubble water in the second sealed tank into the sealed tank, and the second sealed tank is provided with a discharge nozzle that discharges the nanobubble water.

6. The nanobubble water generating device according to claim 5 , wherein two or more other sealed tanks are connected to the sealed tank.

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