Bubble water generation device and bubble water generation method

Abstract

To provide a bubble water generation device and a bubble water generation method capable of increasing the number of generated bubbles per one time, capable of improving bubble water generation efficiency, and capable of generating bubble water of high concentration in a shorter time, by using a pressure difference together with a temperature gradient of solution.SOLUTION: A bubble water generation device includes: a liquid tank 12 storing solution BW; a cooling chiller 14 that cools and circulates the solution BW from the liquid tank 12; and a UFB characteristic nozzle 20 having a function of heating and pressurizing the solution BW from the cooling chiller 14. By repeating jetting the solution BW into the liquid tank 12 by the UFB characteristic nozzle 20, UFB water in which a predetermined number of UFBs are dissolved is generated.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bubble water generating device and a bubble water generating method for generating ultra-fine bubble (UFB) water, also known as nanobubbles. [Background technology]

[0002] BACKGROUND ART Conventionally, an ozone UFB water generating system has been proposed as a bubble water generating device that generates bubble water containing fine bubbles with small particle diameters (see, for example, Patent Document 1).

[0003] This ozone UFB water production system includes at least one tank and another tank for storing liquid, and generates ozone UFB water containing a predetermined number of ozone UFBs by repeatedly transferring liquid between the one tank and the other tank while alternately switching the pressure in the one tank and the pressure in the other tank. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7002781 Summary of the Invention [Problem to be solved by the invention]

[0005] However, although the above-described ozone UFB water production system can produce high-concentration ozone UFB water, it has the problem of taking time to produce it.

[0006] The present invention has been made in consideration of the above, and its object is to provide a bubble water generating device and a bubble water generating method that can improve the efficiency of bubble water generation and generate high-concentration bubble water in a shorter time. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, one embodiment of the bubble water generating device of the present invention comprises a liquid tank for storing a solution, a cooling water circulation device for cooling and circulating the solution from the liquid tank, and a characteristic nozzle having the function of heating and pressurizing the solution from the cooling water circulation device, and is characterized in that by repeatedly spraying the solution into the liquid tank using the characteristic nozzle, bubble water containing a predetermined number of dissolved microbubbles is generated.

[0008] Another aspect of the present invention is a method for generating bubbled water, which comprises the steps of taking in a solution stored in a liquid tank and cooling it using a cooling water circulation device, and heating the solution supplied from the cooling water circulation device using a special nozzle, pressurizing it, and spraying it into the liquid tank to generate fine bubbles.The method is characterized in that by repeating each of the above steps, bubbled water containing a predetermined number of dissolved fine bubbles is generated. [Effects of the Invention]

[0009] According to the present invention, by utilizing not only the pressure difference but also the temperature gradient of the solution, it is possible to increase the number of bubbles generated per cycle, thereby improving the efficiency of bubble water generation and providing a bubble water generating device and bubble water generating method that can generate high-concentration bubble water in a shorter time. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing an example of the configuration of a UFB (ultra-fine bubble) water generating system according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional view showing the schematic configuration of a UFB characteristic nozzle for heating and pressurizing the UFB water generation system according to this embodiment. [Figure 3] 1 is a diagram showing a comparison of the relationship between temperature change and dissolved concentration in the UFB water generating system according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The bubble water generating device and the bubble water generating method according to the embodiment of the present invention will be described below with reference to the drawings. Note that the drawings are only a schematic representation of the outline of the invention and may differ from the actual product.

[0012] Embodiment FIG. 1 is a schematic cross-sectional view showing the general configuration of a temperature gradient type pressure-dissolution type UFB water generation system 10 to which a bubble water generation device and bubble water generation method according to an embodiment of the present invention are applied.

[0013] Here, the UFB water generation system 10 according to this embodiment will be described as automatically generating UFB water in which UFB bubbles (fine bubbles) with nano-level particle size are dissolved in a solution BW.

[0014] As shown in FIG. 1, the UFB water generation system 10 of this embodiment is configured to include a liquid tank 12 for storing solution BW, a cooling chiller 14, a gas cylinder (gas supply unit) 16, a gas-liquid mixer 18, and a UFB-specific nozzle 20 for heating and pressurizing.

[0015] The liquid tank 12 is for storing the solution BW, and is configured to store the solution BW in which UFB is dissolved, which is repeatedly generated by spraying the solution BW from the UFB characteristic nozzle 20 sequentially (when UFB is generated).

[0016] A pipe 31, which serves as a flow path for the solution BW, is connected to the liquid tank 12 via a valve 30 with a liquid volume adjustment function. When UFB is produced, the solution BW in the liquid tank 12 is supplied to the gas-liquid mixer 18 via this pipe 31.

[0017] The gas-liquid mixer 18 mixes a desired gas supplied from a gas cylinder 16 with the solution BW supplied from the liquid tank 12 via a pipe 31 .

[0018] In addition to the pipe 31, the gas-liquid mixer 18 is provided with a gas supply pipe 35 connected to the gas cylinder 16 and a pipe 33 connected to the cooling chiller 14. When UFB is produced, the solution BW mixed with the desired gas is sent to the cooling chiller 14 via the pipe 33.

[0019] The gas cylinder 16 supplies a desired gas, such as oxygen (O2) or carbon dioxide (CO2), which serves as a raw material (dissolved gas) for increasing the dissolved concentration of UFB in the solution BW, to the gas-liquid mixer 18 via the gas supply pipe 35.

[0020] The cooling chiller 14 is, for example, a cooling water circulation device manufactured by our company (Yamato Scientific Co., Ltd.), which cools the solution BW mixed with the desired gases supplied from the gas-liquid mixer 18 via piping 33 to about 4°C to 10°C and circulates it during UFB production. A UFB characteristic nozzle 20 is connected to the cooling chiller 14 via piping 32.

[0021] During UFB production, the UFB nozzle 20 heats and pressurizes the solution BW supplied from the cooling chiller 14 via the piping 32 to, for example, about 40°C to 60°C, and sprays it from above the liquid tank 12. As a result, UFB is produced, the temperature of the solution BW in the liquid tank 12 is raised to, for example, about 30°C, and the dissolved concentration of UFB in the solution BW is gradually increased.

[0022] FIG. 2 shows a cross-sectional view of a schematic configuration of the UFB characteristic nozzle 20 in the UFB water generating system 10 according to this embodiment.

[0023] As shown in FIG. 2, the UFB characteristic nozzle 20 includes, for example, an aluminum pressurized dissolving nozzle portion 21, a heat generating tip (Teg tip) 26 and a temperature controller 25 protected by a heat insulating sheet 24, and a resin cover member 23.

[0024] The pressurized dissolving nozzle part 21 has a hollow cylindrical shape, and the diameter of the hollow base end part 21a on the side to which the pipe 32 is connected via the connecting part 27 is about 8 mmΦ.

[0025] The diameter of the jetting portion 21c on the side from which the solution BW is jetted is about 1.5 mm, and the diameter of the connecting portion 21b connecting the jetting portion 21c and the base end portion 21a is about 4 mm.

[0026] A heating tip 26 for a heater is disposed so as to correspond to at least a part of the base end 21a, and is controlled by a temperature controller 25 so that the temperature of the heated solution BW is about 40°C to 60°C.

[0027] With this configuration, when generating UFBs, it is possible to easily generate an increased number of UFBs each time from the UFB characteristic nozzle 20, depending on the pressure difference (differential pressure) and temperature gradient (temperature difference) between the base end 21a and the ejection portion 21c.

[0028] In other words, by utilizing not only the pressure difference but also the temperature gradient, it is possible to increase the number of UFB produced per cycle, thereby improving the efficiency of UFB water production and enabling the production of highly concentrated UFB water in a shorter time.

[0029] FIG. 3 shows a comparison of the relationship between the temperature change and the dissolved concentration of the solution BW in the UFB water generating system 10 according to this embodiment.

[0030] As is clear from this figure, in this embodiment, the dissolved concentration of UFB in the solution BW increases as the desired gas is supplied from the gas cylinder 16. The dissolved concentration also increases when the temperature of the solution BW is lowered by the cooling chiller 14.

[0031] Conversely, if the temperature of the solution BW increases, it becomes difficult to maintain the dissolved gas in the solution BW, resulting in a decrease in the dissolved concentration.

[0032] Next, the operation of the UFB water generating system 10 according to this embodiment will be briefly described.

[0033] When producing UFB water, first, a predetermined amount of solution BW at, for example, about 30° C. is stored in the liquid tank 12.

[0034] In this state, the cooling chiller 14 starts operating, and as the first UFB is produced, a certain amount of the solution BW is sent from the liquid tank 12 to the gas-liquid mixer 18 via the pipe 31.

[0035] At the same time, the desired gas is supplied to the gas-liquid mixer 18 from the gas cylinder 16 via the gas supply pipe 35. After the solution BW and the desired gas are mixed in the gas-liquid mixer 18, the solution BW is sent to the cooling chiller 14 via the pipe 33. The cooling chiller 14 cools the temperature of the solution BW to about 4°C to 10°C.

[0036] Then, the solution BW cooled to about 4°C to 10°C from the cooling chiller 14 is forcefully sent to the UFB characteristic nozzle 20 via the pipe 32, where it is heated to about 40°C to 60°C.

[0037] As a result, the solution BW, which is mixed with the desired gas and heated and pressurized, is sprayed from the spray portion 21c at the tip of the UFB nozzle 20 into the liquid tank 12. As a result, a considerable number of UFBs are produced, and the dissolved concentration of UFBs in the solution BW in the liquid tank 12 increases accordingly.

[0038] The above series of operations is counted as one cycle, and by repeating this any number of times, UFB water in which the dissolved concentration of UFB in the solution BW is made high can be produced in a short period of time.

[0039] As described above, according to the UFB water generation system 10 of this embodiment, by utilizing not only the pressure difference but also the temperature gradient of the solution BW, it is possible to increase the number of UFBs generated per cycle.

[0040] That is, UFB is generated by utilizing the pressure and temperature difference of the solution BW. This makes it possible to easily increase the number of UFB produced per run. Therefore, the efficiency of UFB water production can be improved, and high-concentration UFB water can be produced in a shorter time. [Explanation of symbols]

[0041] 10 UFB water generation system (bubble water generation device) 12 Liquid tank 14 Cooling chiller (cooling water circulation device) 16 Gas cylinder (gas supply unit) 18 Gas-liquid mixer 20 UFB special nozzle (for heating and pressurization) 25 Temperature Controller 26 Heat generating chip (Teg chip) BW solution (UFB water)

Claims

1. a liquid tank for storing a solution; a cooling water circulator that cools and circulates the solution from the liquid tank; a special nozzle having a function of heating and pressurizing the solution from the cooling water circulator; Equipped with A bubble water generating device characterized by repeatedly spraying the solution into the liquid tank using the characteristic nozzle to generate bubble water containing a predetermined number of dissolved microbubbles.

2. 2. The bubble water generating device according to claim 1, further comprising a gas-liquid mixer that mixes the solution from the liquid tank with a desired gas from a gas supply unit.

3. 3. The bubble water generating device according to claim 2, wherein the gas supply unit supplies a dissolved gas for increasing the dissolved concentration in the solution as the desired gas.

4. The bubble water generating device according to claim 1, wherein the special nozzle comprises a heating tip and a temperature controller.

5. Taking the solution stored in the liquid tank and cooling it with a cooling water circulator; generating fine bubbles by heating and pressurizing the solution supplied from the cooling water circulator using a special nozzle and spraying it into the liquid tank; Equipped with A method for generating bubble water, characterized by repeating each of the above steps to generate bubble water containing a predetermined number of dissolved microbubbles.

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