Bubble water generating device and bubble water generating method

Abstract

To generate, in a shorter time, a large amount of bubble water or ultra-high concentration bubble water containing dissolved nano-level fine bubbles.SOLUTION: A bubble water generating device comprises: syringe-type ultra-fine bubble (UFB) generating units 30R, 30L having syringes 33R, 33L and plungers 34R, 34L, respectively, with actuation handles of the plungers 34R, 34L being interconnected; a slide unit 12 for driving integrally each of the plungers 34R, 34L; a control unit 15 for controlling the slide unit 12 to cause the plungers 34R, 34L to move back and forth; a UFB water storage tank 20 for storing UFB water 27; and gas-liquid mixing unit units 23R, 23L arranged in the UFB water storage tank 20 and connected to the syringes 33R, 33L via water conduits 21R, 21L, respectively. The bubble water generating device repeatedly alternately moves UFB water 27 stored in the UFB water storage tank 20 to each of the UFB generating units 30R, 30L, thereby, producing the UFB water 27 containing UFBs.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bubble water generating device and a bubble water generating method that generate ultra-fine bubble (UFB) water using a piston system. [Background technology]

[0002] Conventionally, as an apparatus for producing bubble water containing fine bubbles with extremely small particle diameters, for example, a bubble water producing apparatus and a bubble water producing method using a syringe such as an injector have been proposed (see Patent Document 1 below).

[0003] This proposal involves the generation of nano-level fine bubbles (UFB) as the plunger reciprocates within the syringe, drawing in and discharging the solution into the syringe. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7357957 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, although it has been easy to produce UFB water containing nano-level fine bubbles, a large syringe has been necessary to produce a large amount of UFB water (for example, several liters).

[0006] However, there is a limit to how large a syringe can be made, and it takes a long time to produce a large amount of UFB water with dissolved nano-level fine bubbles or ultra-high concentration UFB water (for example, more than 10 billion bubbles / ml).

[0007] The present invention has been made in consideration of the above, and its purpose is to provide a bubble water generating device and a bubble water generating method that can generate large amounts of UFB water or ultra-high concentration UFB water with dissolved nano-level fine bubbles in a shorter time. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, an aspect of the present invention is characterized in that it comprises at least a pair of syringe-shaped bubble generators, each having an outer tube and a plunger, the plungers being connected at their respective actuating handles; a drive unit that drives each of the plungers of the at least a pair of bubble generators integrally; a control unit that controls the drive unit to cause each of the plungers to move back and forth; a liquid tank that stores a solution; and at least one set of gas-liquid mixing units that are disposed in the liquid tank and connected via piping to each of the outer tubes of the at least a pair of bubble generators, and that bubble water containing ultrafine bubbles is produced by repeatedly alternately transferring the solution stored in the liquid tank to each of the at least a pair of bubble generators.

[0009] Another aspect of the present invention is a method for generating bubble water containing ultrafine bubbles using a bubble water generating device, characterized in that the control unit controls the drive unit to cause each of the plungers of at least a pair of syringe-shaped bubble generating units, each having an outer tube and a plunger, to move back and forth together, and the solution stored in the liquid tank is repeatedly moved alternately to each of the at least a pair of bubble generating units, thereby generating bubble water containing ultrafine bubbles. [Effects of the Invention]

[0010] According to the present invention, it is possible to efficiently generate UFB water using a piston system, and it is possible to provide a bubble water generating device and a bubble water generating method that can generate large amounts of UFB water or ultra-high concentration UFB water with nano-level fine bubbles dissolved in it in a shorter time. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view schematically showing an example of the configuration of a UFB water production apparatus according to one embodiment of the present invention. [Figure 2] 1 is a cross-sectional view showing a schematic configuration of a UFB generating unit of a UFB water producing apparatus according to one embodiment. [Figure 3] 1 is a cross-sectional view showing a schematic configuration of a gas-liquid mixing unit of a UFB water production apparatus according to one embodiment. [Figure 4] 1 is a flowchart shown to explain the operation of a UFB water production device (a method for producing bubbled water) according to one embodiment. [Figure 5] FIG. 2 is a cross-sectional view illustrating the operation of the UFB water production apparatus according to one embodiment. [Figure 6] 10 illustrates measurement data of UFB water produced by a UFB water production device according to an embodiment. [Figure 7] FIG. 10 is a cross-sectional view schematically showing an example of the configuration of a UFB water production apparatus according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] 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.

[0013] One embodiment FIG. 1 shows an example of the configuration of a piston-type (syringe-type) UFB water production device 1 to which a bubble water production device according to one embodiment of the present invention is applied.

[0014] As shown in Figure 1, this UFB water production device 1 includes a UFB water storage tank (liquid tank) 20, gas-liquid mixing unit sections 23R, 23L, a pair of UFB generating sections (bubble generating sections) 30R, 30L, a slide section 12 and a holding section 14 that form the driving section, and a control section (control section) 15.

[0015] The UFB water storage tank 20 stores UFB water (solution) 27 and includes a pair of gas-liquid mixing units 23R and 23L. The UFB water storage tank 20 is capable of storing a volume of UFB water 27 that is at least approximately the same as the volume of the syringes 33R and 33L of the UFB generation units 30R and 30L, allowing for miniaturization.

[0016] The gas-liquid mixing units 23R and 23L have the same structure, and one end (lower end) of each is immersed in UFB water 27 (the gas-liquid mixing units 23R and 23L will be described in detail later).

[0017] The other end (upper end) of the gas-liquid mixing units 23R and 23L is connected to one end of the water conduits 21R and 21L, respectively, which serve as piping. The other end of the water conduit 21R is connected to the nozzle of the syringe 33R of the UFB generation unit 30R, and the other end of the water conduit 21L is connected to the nozzle of the syringe 33L of the UFB generation unit 30L.

[0018] That is, gas-liquid mixing units 23R, 23L are arranged in the UFB water storage tank 20 so that their lower ends are immersed in the UFB water 27, and UFB generation units 30R, 30L are connected to the upper ends of the gas-liquid mixing units 23R, 23L via water conduits 21R, 21L.

[0019] The UFB generating units 30R, 30L both have the same structure, consisting of syringes 33R, 33L forming outer cylinders and plungers (pushers) 34R, 34L forming pistons (the UFB generating units 30R, 30L will be described in detail later).

[0020] In this embodiment, two syringe-shaped UFB generators 30R, 30L are arranged with a predetermined distance (e.g., approximately the same as the length or movement distance of the plungers 34R, 34L) between them so that the occlusion handles of the plungers 34R, 34L face each other. The occlusion handles are held (sandwiched) by holders 32R, 32L fixed in common on the holder 14.

[0021] The holding portion 14 supports and fixes the holder portions 32R, 32L that hold the respective occlusion handles of the plungers 34R, 34L of the UFB generating portions 30R, 30L, and is provided so as to be slidable in the directions of the arrows XR, XL shown in the figure by the sliding portion 12.

[0022] The slide portion 12 is used to move the holding portion 14 back and forth (repeatedly) in the directions of the arrows XR and XL shown in the figure, and is configured to include a drive mechanism (not shown), such as an electric motor or an air drive device, which is controlled by the control portion 15.

[0023] The control unit 15 includes programs for controlling, for example, the depressurization speed (forward movement speed), pressurization speed (return movement speed), position maintenance time (interval time), and number of reciprocating movements of the plungers 34R, 34L and gaskets 35R, 35L. By controlling (programmed operation) the slide unit 12 in accordance with a program based on settings input by the operator, it is possible to control the size (particle size) and amount (number) of bubbles generated in the UFB generating units 30R, 30L.

[0024] That is, during production of UFB water 27, for example, the holding unit 14 is slid in the direction of the illustrated arrow XR by the sliding unit 12 under the control of the control unit 15. Then, in the UFB generators 30R, 30L, the plunger 34R is pushed into the syringe 33R as a return movement, and the plunger 34L is pulled out of the syringe 33L as a forward movement.

[0025] Conversely, when producing UFB water 27, for example, suppose that holding unit 14 is slid in the direction of arrow XL by sliding unit 12. Then, as a forward movement, plunger 34R of UFB generator 30R is pulled out from syringe 33R, and as a backward movement, plunger 34L of UFB generator 30L is pushed into syringe 33L.

[0026] Details will be described later, but in the past, in the UFB generation section 30R, 30L, as the plunger 34R, 34L is pulled out from the syringe 33R, 33L, the syringe 33R, 33L is filled with UFB water 27 taken in from the UFB water storage tank 20 via the gas-liquid mixing unit section 23R, 23L.

[0027] The UFB water 27 filling the syringes 33R, 33L is mixed with gas taken in through the gas inlet 25c (described later) in the gas-liquid mixing units 23R, 23L. As the plungers 34R, 34L move in the withdrawing direction, the environment in the syringes 33R, 33L changes from normal pressure to reduced pressure, causing the dissolved gas in the UFB water 27 to turn into bubbles, which are gradually crushed. Finally, the bubbles are broken down into nano-level fine bubbles (UFB).

[0028] On the other hand, when returning, as the plungers 34R, 34L are pushed into the syringes 33R, 33L, the UFB water 27 that filled the syringes 33R, 33L in the past is sent to the UFB water storage tank 20 via the gas-liquid mixing unit sections 23R, 23L.

[0029] The UFB water 27 sent to the UFB water storage tank 20 is mixed with gas taken in through a gas inlet 25c (described later) in the gas-liquid mixing units 23R and 23L, and then stored therein.

[0030] In this way, in the UFB generating units 30R, 30L, the reciprocating motion of the plunger 34R and gasket 35R in the UFB generating unit 30R and the reciprocating motion of the plunger 34L and gasket 35L in the UFB generating unit 30L are alternately repeated during the production of UFB water 27. In other words, by controlling (phase difference control) the phases of the plungers 34R, 34L, which are driven simultaneously (integrally), to be shifted by 180 degrees, it becomes possible to continuously produce UFB water 27 in the UFB generating units 30R, 30L.

[0031] By controlling the reciprocating motion of the plungers 34R, 34L and gaskets 35R, 35L to a predetermined number of times, it is ultimately possible to produce a predetermined size and amount of UFB in the production of UFB water 27.

[0032] FIG. 2 is a cross-sectional view showing a schematic configuration of the UFB generating units 30R and 30L of the UFB water producing apparatus 1 according to this embodiment.

[0033] 2, UFB generators 30R, 30L have gaskets 35 (corresponding to 35R, 35L) provided on the tip side of plungers 34 (corresponding to 34R, 34L) so as to leave no gap between the tip side and the inner diameter of syringes 33 (corresponding to 33R, 33L), and packing members 36 replaceably attached to the front side of gasket 35 by screws 37 or the like. The multi-layer structure of gasket 35 and packing members 36 can prevent UFB water 27 from leaking beyond gasket 35 within syringe 33 during production of UFB water 27, ensuring the safety of operators even when introducing ozone gas, for example.

[0034] A reduced pressure water intake chamber 38 is formed between the packing member 36 and the tip of the syringe 33 to take in the UFB water 27 from the UFB water storage tank 20 into the syringe 33. The volume of the reduced pressure water intake chamber 38 changes depending on the position of the plunger 34 relative to the syringe 33.

[0035] Here, it is desirable that the syringe 33 be formed so that, for example, the inner diameter (diameter) of the cylindrical body portion is 15 mm or more, the length (cylindrical length) is 50 mm or more, the inner diameter of the cylindrical tip portion is 2 mm or more, and the difference between the inner diameter of the cylindrical body portion and the inner diameter of the cylindrical tip portion is 10 mm or more.

[0036] In addition, in the UFB generating units 30R, 30L, a liquid accelerating and pressurizing unit 31 is provided at the tip of the syringe 33 to which the water conduit 21 (corresponding to 21R, 21L) is connected, for example by the Venturi effect. This liquid accelerating and pressurizing unit 31 is replaceably provided at the attachment end of the half joint 39 (corresponding to 39R, 39L) with the syringe 33, for example by RC connection screw processing technology.

[0037] That is, in this embodiment, it is possible to change the inlet diameter of the UFB water 27 by replacing the liquid acceleration and pressurization unit 31. This makes it possible to change the flow rate of the UFB water 27 depending on the inlet diameter of the UFB water 27 in the liquid acceleration and pressurization unit 31.

[0038] FIG. 3 is a cross-sectional view showing a schematic configuration of the gas-liquid mixing units 23R, 23L of the UFB water producing apparatus 1 according to this embodiment.

[0039] 3, the gas-liquid mixing units 23R, 23L have the same structure and include a gas-liquid contact member 25. An opening 25d is provided at the upper end of the gas-liquid contact member 25 that is exposed above the surface of the UFB water 27, and an opening (intake and discharge port) 25e that is connected to the opening 25d via a connecting path 25a is provided at the lower end that is submerged in the UFB water 27.

[0040] The water conduit 21 is connected to the opening 25d of the gas-liquid contact member 25 via a tube joint 24.

[0041] Gas inlets 25b and 25c connected to the connecting passage 25a are provided on the side surface of the gas-liquid contact member 25 that is exposed above the water surface of the UFB water 27. The gas inlet 25b of the gas-liquid contact member 25 is provided with a gas-liquid flow rate adjusting member 125 that is detachably attached to the connecting passage 25a. The gas-liquid flow rate adjusting member 125 is used to take in gas (air or gas) from the UFB water storage tank 20 through the gas inlet 25c.

[0042] In other words, the gas-liquid mixing unit sections 23R, 23L are capable of dissolving (mixing) the gas self-absorbed from the gas intake ports 25b, 25c into the UFB water 27 flowing through the connecting path 25a in accordance with the attachment and detachment of the gas-liquid flow rate adjusting member 125.

[0043] More specifically, gas-liquid flow rate adjusting member 125 is formed by connecting special set screws (also called enamel sets) with through-holes of different diameters, and by closing them in place, it is possible to adjust the flow rate of the gas taken in from gas inlet 25c. Also, by changing the degree of closing in connecting path 25a by attaching and detaching, it is possible to change the flow of UFB water 27 in connecting path 25a, thereby adjusting the particle size and number of bubbles generated.

[0044] In this embodiment, the UFB water storage tank 20 may be configured to be capable of introducing outside air (air) into the tank or supplying a special gas or the like.

[0045] Fig. 4 is a flowchart for explaining the method of producing UFB water 27 using the piston-type UFB water producing device 1 according to this embodiment. Fig. 5(a) shows the operation during production using UFB generating unit 30R, and Fig. 5(b) shows the operation during production using UFB generating unit 30L.

[0046] In FIG. 4, first, an operator puts a solution (for example, raw water such as pure water) for producing UFB water 27 into the UFB water storage tank 20 of the UFB water production device 1 (step S01).

[0047] Next, input is made to the control unit 15 to set the drive speed and number of times of driving of the plungers 34R and 34L (step S02).

[0048] Thereafter, a predetermined program is started, and the control unit 15 controls the slide unit 12 based on the setting input by the operator, thereby starting the repetitive motion of the holding unit 14 (step S03). The repetitive motion of the holding unit 14 is repeated according to the driving speed and number of driving times set and input by the operator.

[0049] Then, in conjunction with the repeated movement of the holding portion 14, the plungers 34R, 34L of the UFB generating portions 30R, 30L fixed to the holder portions 32R, 32L are simultaneously caused to reciprocate alternately within the syringes 33R, 33L according to the inputted drive speed and number of drives (step S04).

[0050] Here, the solution stored in the UFB water storage tank 20 contains dissolved gas, for example, when gas in the UFB water storage tank 20 is bubbled during negative pressure (return movement).

[0051] The solution stored in the UFB water storage tank 20 is sucked out of the UFB water storage tank 20 when the plungers 34R, 34L move in the direction of being pulled out of the syringes 33R, 33L (forward movement) in the UFB generators 30R, 30L. Then, in the gas-liquid mixing units 23R, 23L, the solution is mixed with the gas taken in through the gas inlets 25b, 25c.

[0052] The gas-mixed solution is then sent to the UFB generators 30R, 30L via the water conduits 21R, 21L. Then, after passing through the liquid accelerating and pressurizing unit 31 of the UFB generators 30R, 30L, it is taken into the decompression and water intake chamber 38 in the syringe 33R, 33L. When the solution is taken into the decompression and water intake chamber 38, bubbles of a size and number corresponding to the introduction diameter of the liquid accelerating and pressurizing unit 31 and the driving speed (decompression speed) of the plungers 34R, 34L are generated in the solution.

[0053] That is, in the UFB generating unit 30R, as shown by the arrow XL in Figure 5(a), the pressure inside the syringe 33R is reduced by the forward movement of the plunger 34R, and the change in the environment from normal pressure to reduced pressure causes the dissolved gas to turn into bubbles, which are then gradually crushed and made into fine particles.

[0054] Accordingly, in the UFB generating section 30L, the return movement of the plunger 34L pressurizes the syringe 33L, and the UFB water 27 containing bubbles (due to the previous forward movement) is pushed out of the syringe 33L. Then, in the gas-liquid mixing unit 23L, the gas in the UFB water storage tank 20 is further bubbled and then stored there.

[0055] Similarly, in the UFB generating unit 30L, the pressure inside the syringe 33L is reduced by the forward movement of the plunger 34L, as shown by the arrow XR in Figure 5(b), and the change in the environment from normal pressure to reduced pressure causes the dissolved gas to turn into bubbles, which are then gradually crushed and made into fine particles.

[0056] Accordingly, in the UFB generating section 30R, the return movement of the plunger 34R pressurizes the syringe 33R, forcing the UFB water 27 containing bubbles (due to the previous forward movement) out of the syringe 33R. Then, in the gas-liquid mixing unit 23R, the gas in the UFB water storage tank 20 is further bubbled and then stored there.

[0057] In this way, the pair of UFB generators 30R, 30L, which are driven simultaneously, alternately generate fine bubbles (absorb and drain the solution), that is, the repetitive motion of the UFB generators 30R, 30L is repeated until the set number of drives is reached.

[0058] In this way, by alternately repeating the generation of UFB using a pair of UFB generators 30R, 30L configured so that the drive timing is shifted by 180 degrees, it is ultimately possible to efficiently produce UFB water 27 having the desired particle size and concentration (step S05).

[0059] The UFB water 27 thus produced can be freely used for various purposes at any time.

[0060] FIG. 6 illustrates measurement data obtained by measuring UFB water 27 produced by the UFB water producing apparatus 1 according to this embodiment after 5-fold dilution using a nanoparticle analysis system (NANOSIGHT).

[0061] In Figure 6, the graph on the left shows the experimental results (e.g., five experiments), and the graph on the right shows the average values. In both cases, the vertical axis represents FTLA concentration (particles / ml) and the horizontal axis represents particle size (nm).

[0062] Note that Figure 6 shows the results when, for example, the plungers 34R and 34L are driven back and forth 600 times (30 minutes (3 seconds / drive)), the amount of solution is 100 ml (WE200), and the dissolved gas is oxygen in the production of UFB water 27.

[0063] As is clear from this figure, the UFB water production device 1 according to this embodiment can produce 1.14 × 10 UFB particles having a particle size peak around 100 nm. 10 Ultra-high concentration UFB water27 (more than 10 billion particles / ml per 100 ml) containing approximately 10 billion particles / ml can be produced in a shorter time (approximately 30 minutes).

[0064] As described above, according to this embodiment, when UFB water is produced by the piston method, UFB is alternately generated by the pair of UFB generating units 30R, 30L having a syringe-type structure.

[0065] That is, the UFB generators 30R, 30L are arranged so that the active-clog handles of both plungers 34R, 34L face each other, and by driving both active-clog handles together, both plungers 34R, 34L are repeatedly moved. This allows UFB to be generated alternately in the pair of UFB generators 30R, 30L, making it possible to generate a predetermined amount of UFB in half the time required previously. This makes it possible to efficiently produce a large amount of UFB water with the desired particle size and concentration in a shorter time, and is also suitable for producing ultra-high concentration UFB water.

[0066] In particular, when the solution is valuable (expensive), the small capacity of syringes 33R and 33L makes it possible to produce highly concentrated UFB water 27 using the minimum amount of solution, and thus makes it easy to minimize the storage volume in UFB water storage tank 20.

[0067] Other embodiments 7 shows an example of the configuration of a piston-type UFB water production device 1 to which a bubble water production device according to another embodiment of the present invention is applied. Note that the same or similar reference numerals are used to designate the same parts as those in the UFB water production device 1 shown in the first embodiment, and detailed explanations will be omitted.

[0068] The UFB water producing device 1 according to this embodiment is an example configured using a plurality of pairs (two pairs in the illustrated example) of UFB generating parts 30Ra, 30La, 30Rb, 30OLb.

[0069] That is, in the UFB water production device 1 of this other embodiment, for a set of gas-liquid mixing unit sections 23R, 23L, one pair of UFB generation sections 30Ra and the other pair of UFB generation sections 30Rb are connected in parallel to the gas-liquid mixing unit section 23R via water conduits 21Ra, 21Rb, and one pair of UFB generation sections 30La and the other pair of UFB generation sections 30Lb are connected in parallel to the gas-liquid mixing unit section 23L via water conduits 21La, 21Lb.

[0070] In such a configuration, the throughput can be further improved by repeatedly moving one pair of UFB generating units 30Ra, 30La and the other pair of UFB generating units 30Rb, 30Lb synchronously or asynchronously.

[0071] For example, even if the volume size is 1 liter, UFB water 27 with a high concentration of 1 billion particles / ml or more can be produced in about 30 minutes.

[0072] Thus, according to the UFB water producing device 1 of this embodiment, it is possible to produce more highly concentrated UFB water 27 in a shorter time in proportion to the number of pairs of UFB generating units 30R (30Ra, 30Rb) and 30L (30La, 30Lb).

[0073] In any of the embodiments, the gas introduced into the UFB water storage tank 20 may be, for example, ozone, oxygen, nitrogen, or various medical gases.

[0074] The syringes 33 (33R, 33L) can be made of stainless steel, metal treated with fluororesin, resin, glass, or the like.

[0075] The above describes aspects of the present invention by illustrating several embodiments, but each embodiment is merely an example, and the scope of the invention described in the claims can be modified in various ways without departing from the gist of the invention. [Explanation of symbols]

[0076] 1... Piston-type UFB water maker (bubble water generator) 12...Slide unit (drive unit) 14...Holding unit (drive unit) 15...Control section (control unit) 20...UFB water storage tank (liquid tank) 21R, 21Ra, 21Rb, 21L, 21La, 21Lb... Water conduit (piping) 23R, 23L...Gas-liquid mixing unit 25b, 25c...Gas intake port 27...UFB water (solution) 30R, 30Ra, 30Rb, 30L, 30La, 30Lb...UFB generating section (bubble generating section) 31...Liquid acceleration and pressure section 33, 33R, 33L...Syringe (outer barrel) 34, 34R, 34L... Plunger 38...Decompression water intake chamber

Claims

1. At least one pair of syringe-shaped bubble generators each having an outer cylinder and a plunger, the plungers having their respective valve stems connected to each other; a driving unit that integrally drives each of the plungers of the at least one pair of bubble generating units; a control unit that controls the drive unit to reciprocate each of the pushers; a liquid tank for storing a solution; at least one pair of gas-liquid mixing units disposed in the liquid tank and connected to the outer cylinders of the at least one pair of bubble generators via piping; Equipped with A bubble water generating device characterized by producing bubble water containing ultrafine bubbles by repeatedly alternately moving the solution stored in the liquid tank to each of the at least one pair of bubble generating units.

2. 2. The bubble water generating device according to claim 1, wherein the lower end of each of the at least one gas-liquid mixing unit sections is immersed in the solution in the liquid tank.

3. 2. The bubble water generating device according to claim 1, wherein each of the at least one gas-liquid mixing unit sections has a gas intake port for taking in gas to be mixed into the solution.

4. The bubble water generating device described in claim 1, characterized in that at least one pair of bubble generating units has a reduced pressure water absorption chamber at the tip portion of each outer cylinder that draws the solution from the liquid tank into the outer cylinder.

5. A bubble water generating device as described in claim 1 or 4, characterized in that the tip portion of the outer tube of each of the at least one pair of bubble generating units is provided with an interchangeable liquid acceleration and pressurization unit having a different solution introduction diameter for accelerating and pressurizing the solution from the liquid tank.

6. A method for generating bubbled water containing ultra-fine bubbles using the bubbled water generating device according to any one of claims 1 to 5, The control unit controls the drive unit to integrally reciprocate each of the plungers of at least a pair of syringe-type bubble generators each having an outer cylinder and a plunger, A bubble water generating method characterized by generating bubble water containing ultrafine bubbles by repeatedly moving a solution stored in a liquid tank alternately to each of at least one pair of bubble generating units.

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