Bubble water generation device and bubble water generation method

Abstract

To make it possible to easily improve generation capacity of UFB-containing water that contains ultra fine bubbles, and generate a large amount of UFB-containing water.SOLUTION: A bubble water generation device comprises: a UFB storge tank 200 for storing a liquid 41; an injector type decompression pressurizing chamber 100 which is provided outside the UFB storge tank 200, and has a syringe 102 and a plunger 103 for making a gas, which is dissolved in the liquid 41 in the UFB storge tank 200; a drive part 110 which performs continuous reciprocal motion of the plunger 103 in the decompression pressurizing chamber 100; and a flow channel selecting joint part 203 which is provided inside the UFB storge tank 200, and makes the gas dissolved in the liquid 41 in the UFB storge tank 200 into bubbles in such a manner that a pressure state is changed in linkage with the decompression pressurizing chamber 100.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 bubble water containing fine bubbles such as ultrafine bubbles (UFB). [Background technology]

[0002] Conventionally, as devices for generating bubble water containing fine bubbles with extremely small particle diameters, for example, a fine bubble generating method using an infusion pack and a fine bubble generating device for carrying out the fine bubble generating method have been proposed (see Patent Document 1 below).

[0003] This proposal allows the practitioner to easily generate microscopic bubbles in the infusion using a syringe when using the infusion pack. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-130516 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, although conventionally, fine bubbles could be easily generated using a syringe, they were generated during infusion when an infusion pack was used, and therefore their applications were very limited and they were not suitable for producing large amounts of bubbly water.

[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 easily improve the production capacity of bubble water containing ultra-fine bubbles (UFB-containing water) and produce a large amount of UFB-containing water. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the present invention is characterized in that it comprises a water tank for storing liquid, a syringe-type first pressure difference generating unit provided outside the water tank and having an outer cylinder and a plunger for turning gas dissolved in the liquid in the water tank into gas bubbles, a drive unit for continuously reciprocating the plunger of the first pressure difference generating unit, a gas-liquid mixing unit connected to the first pressure difference generating unit and mixing the gas in the water tank with the liquid that is fed into or discharged from the first pressure difference generating unit, and a second pressure difference generating unit connected to the first pressure difference generating unit via the gas-liquid mixing unit and switching its pressure state in conjunction with the first pressure difference generating unit, thereby turning the gas dissolved in the liquid in the water tank into gas bubbles as the liquid is fed into or discharged from the water tank.

[0008] Another aspect of the present invention is a method for generating bubble water containing ultra-fine bubbles using a bubble water generating device, which is characterized in that a first pressure difference generating unit is provided outside a water tank for storing liquid, and a drive unit is used to continuously reciprocate the plunger of a syringe-type first pressure difference generating unit having an outer tube and a plunger, thereby turning the gas dissolved in the liquid in the water tank into bubbles in accordance with the pressure difference during the transition from a normal pressure state to a reduced pressure state, and a second pressure difference generating unit is provided inside the water tank via a gas-liquid mixing unit, and the pressure state is switched in conjunction with the first pressure difference generating unit, thereby turning the gas dissolved in the liquid in the water tank into bubbles in accordance with the pressure difference during the transition from a pressurized state to a normal pressure state. Effect of the Invention

[0009] According to the present invention, it is possible to provide a bubble water generating device and a bubble water generating method that can easily improve the production capacity of UFB-containing water containing ultra-fine bubbles and produce a large amount of UFB-containing water. [Brief description of the drawings]

[0010] [Figure 1]1A and 1B are schematic diagrams showing a configuration example of a UFB water generating apparatus according to an embodiment of the present invention, in which FIG. 1A is a side cross-sectional view and FIG. 1B is a plan (top) view. [Diagram 2] This is shown to explain the operation of the UFB water generating device (method of generating bubble water), with Figure (a) showing slight reduced pressure ⇒ reduced pressure, and Figure (b) showing pressurized ⇒ normal pressure. [Diagram 3] This shows an example (first example) of the configuration of the automatic water pressure switching joint (flow path switching joint) of a UFB water generating device, where Fig. (a) shows slight reduced pressure ⇒ reduced pressure, and Fig. (b) shows pressurized ⇒ normal pressure. [Figure 4] 1 is a graph showing the results of a bubble water generation experiment using a UFB water generation device in comparison with the conventional method. [Diagram 5] This shows an example (second example) of the configuration of the water pressure automatic switching joint, where Fig. (a) shows slight reduced pressure ⇒ reduced pressure, and Fig. (b) shows pressurized ⇒ normal pressure. [Figure 6] This shows an example (third example) of the configuration of the water pressure automatic switching joint, where Fig. (a) shows slight reduced pressure ⇒ reduced pressure, and Fig. (b) shows pressurized ⇒ normal pressure. [Figure 7] This shows an example (4th example) of the configuration of the water pressure automatic switching joint, where Fig. (a) shows slight reduced pressure ⇒ reduced pressure, and Fig. (b) shows pressurized ⇒ normal pressure. [Figure 8] This shows an example (5th example) of the configuration of the water pressure automatic switching joint, where Fig. (a) shows slight reduced pressure ⇒ reduced pressure, and Fig. (b) shows pressurized ⇒ normal pressure. [Figure 9] This shows an example of the configuration of the water pressure automatic switching joint (example 6), where Figure (a) shows slight reduced pressure ⇒ reduced pressure, and Figure (b) shows pressurized ⇒ normal pressure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description of the embodiment, the drawings are used to show a schematic outline of the invention, and the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

[0012] Embodiment FIG. 1 shows an example of the configuration of a UFB water generating device to which a bubble water generating device according to an embodiment of the present invention is applied, where FIG. 1(a) is a side cross-sectional view of a UFB water generating device with a portion cut away, and FIG. 1(b) is a plan view of the UFB water generating device shown from the top side.

[0013] As shown in FIGS. 1(a) and 1(b), this UFB water generating device is composed of a reduced pressure generating unit 11, a pressurized pressure generating unit 21, and a piping line 31 connecting the reduced pressure generating unit 11 and the pressurized pressure generating unit 21.

[0014] The reduced pressure generating unit 11 includes a syringe-type reduced pressure / pressurization chamber (first pressure difference generating unit) 100, and a drive unit 110 that continuously drives a plunger (push member / piston) 103 back and forth within a fixed syringe (outer cylinder) 102 in the reduced pressure / pressurization chamber 100.

[0015] The driving unit 110 has a rotatable disk 112 and a motor 113 attached via a gear to a portion other than the rotation shaft (center shaft) on one surface of the disk 112. One end of a shaft rod 114 is displaceably attached to a portion other than the rotation shaft facing the motor 113 on the other surface of the disk 112. The other end of the shaft rod 114 is attached to the outer end of the plunger 103.

[0016] In this reduced pressure generating unit 11, the motor 113 of the drive unit 110 is controlled to rotate the disk body 112 in the direction of the arrow x shown in the figure, and one end of the shaft rod 114 is displaced, thereby causing the plunger 103 to continuously reciprocate so as to move in and out of the syringe 102.

[0017] In the decompression / pressurization chamber 100, when the plunger 103 moves in a direction to be pulled out of the syringe 102 (for example, in the forward direction), the inside of the syringe 102 changes from a normal pressure state to a reduced pressure state. Then, liquid (solution) 41 containing gas in a normal pressure state is introduced therein through the piping 31, so that the dissolved gas in the liquid 41 is suddenly exposed to a reduced pressure state, and a transition is made to a state in which UFB is generated. As a result, bubbles of a size and number according to the moving speed (reduced pressure speed) of the plunger 103 are generated in the liquid 41 (reduced pressure generation process).

[0018] That is, the pressure inside the syringe 102 is reduced by the forward movement of the plunger 103, 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 into fine particles.

[0019] In the decompression / pressurization chamber 100, when the plunger 103 moves in a direction to be pushed into the syringe 102 (for example, when returning), the inside of the syringe 102 is changed from a normal pressure state to a pressurized state. As a result, the liquid 41 in the syringe 102 is sent to the gas-liquid mixing section 202 of the pressure generating section 21 via the piping 31.

[0020] On the other hand, the pressurized pressure generating unit 21 includes a UFB storage tank 200, a gas-liquid mixing unit 202, and a flow path switching joint unit (automatic water pressure switching joint unit) 203 as a second pressure difference generating unit.

[0021] The UFB storage tank 200 is for storing approximately 100 ml of liquid 41, such as pure water, and is ultimately designed to store UFB-containing water (bubble water) that contains fine bubbles of nano-level size generated from the liquid 41.

[0022] The gas-liquid mixer 202 is disposed above (upstream of) the flow path switching joint 203 so as to be exposed above the water surface of the liquid 41 in the UFB storage tank 200. The gas-liquid mixer 202 is configured to bubble the gas in the UFB storage tank 200 into the liquid 41 passing therethrough as the liquid 41 passes through.

[0023] The flow path switching joint portion 203 is disposed so as to be submerged in the liquid 41 in the UFB storage tank 200 .

[0024] That is, in the pressurized pressure generating unit 21, as the plunger 103 in the reduced pressure generating unit 11 moves, the inside of the flow path switching joint 203 switches from normal pressure to reduced pressure (slightly reduced pressure) and from pressurized to normal pressure.

[0025] The flow path switching joint 203 transitions to a state in which UFB is generated due to the pressure difference between normal pressure and reduced pressure and the pressure difference between increased pressure and normal pressure (pressurized generation process).

[0026] In particular, when changing from pressurized to normal pressure, for example, by repeating the states of high pressure ⇒ normal pressure ⇒ high pressure by pulse control of motor 113, it is possible to continuously control the generation of UFB containing more dissolved gas under higher pressure conditions than when the high pressure state is maintained continuously.

[0027] Example 1 FIG. 2 shows a method for producing UFB-containing water, using an example in which a gas-liquid mixing section 202 and a flow path switching joint section 203 are integrated, where FIG. 2(a) shows the case where slight reduced pressure is reduced, and FIG. 2(b) shows the case where pressurized pressure is increased to normal pressure.

[0028] Here, the flow path switching joint 203 is a cylindrical pressure drain side type hydraulic automatic switching joint (pressure melting generation method), and inside it is provided a sphere (normal ball type) 220 that rises and falls with pressure changes inside the joint. This sphere 220 is almost a perfect sphere (fully closed type) and has a diameter of about 6.0 mmφ.

[0029] A water inlet (opening) 213 of about 5.0 mmφ that can be opened and closed by a sphere 220 is provided on the bottom surface of the joint, and a pressurized drainage inlet 212 of about 1.7 mmφ or 2.0 mmφ is provided on the side surface of the joint.

[0030] In other words, this flow path switching joint part 203 is designed to open and close the water inlet 213 by the rising and falling of the sphere 220, and is configured so that the flow path (flow rate) of the liquid 41 is switched depending on whether the water inlet 213 is opened or closed.

[0031] For example, when the sphere 220 floats, the water inlet 213 is opened and the liquid 41 in the UFB storage tank 200 is taken in through the water inlet 213. Conversely, when the sphere 220 sinks, the water inlet 213 is closed and the liquid 41 in the UFB storage tank 200 is drained through the pressurized drainage inlet 212.

[0032] On the other hand, a piping line (with an inner diameter of about 4.0 mmφ) 31 from the reduced pressure generating unit 11 is connected to the gas-liquid mixing unit 202, and a gas inlet port 211 with a diameter of about 0.3 mmφ is provided on the side surface thereof.

[0033] A partitioning anti-floating rod 210 for restricting the floating of the sphere 220 is provided between the gas-liquid mixing section 202, which is provided integrally with the flow path switching joint section 203, and the flow path switching joint section 203.

[0034] It is desirable that the liquid 41 is stored in the UFB storage tank 200 based on the position of the floating suppression rod 210. In other words, the gas-liquid mixer 202 and the flow path switching joint 203 are set so that the position of the floating suppression rod 210 corresponds to the water surface of the liquid 41.

[0035] When the pressure is slightly reduced and the pressure is reduced, that is, when the plunger 103 is moved in the direction of being pulled out of the syringe 102, the sphere 220 moves away from the water inlet 213 in response to the changing pressure difference (about 0.03 MPa or more), as shown in FIG.

[0036] Then, liquid 41 is taken into the flow path switching joint 203 through the water inlet 213 and the pressurized drainage inlet 212 , and gas for dissolution is taken in through the gas inlet 211 of the gas-liquid mixer 202 .

[0037] As a result, in the flow path switching joint 203, as shown in FIG. 3(a), for example, dissolved gas becomes UFB as the liquid 41 is taken in from the pressurized drainage inlet 212 and the water inlet 213.

[0038] In the gas-liquid mixer 202 , the gas is taken in from the gas inlet 211 , and the gas is dissolved in the liquid 41 at normal pressure. The gas is then sent to the decompression / pressurization chamber 100 via the piping 31 .

[0039] In the decompression / pressurization chamber 100, the inside is put into a decompression state, so that the gas dissolved in the liquid 41 from the gas-liquid mixer 202 is instantly converted into UFB (decompression precipitation type).

[0040] In contrast, when the pressure changes from pressurized to normal pressure, i.e., when plunger 103 is moved in the direction of being inserted into syringe 102, sphere 220 blocks water inlet 213 in response to the changing pressure difference (approximately 0.03 MPa or more), as shown in Figure 2(b), for example.

[0041] As a result, in the decompression / pressurization chamber 100 , the inside is put into a pressurized state, and the gas dissolved in the liquid 41 is converted into UFB, and then sent to the gas-liquid mixing section 202 via the piping 31 .

[0042] In addition, in the gas-liquid mixer 202 , the liquid 41 containing the pressurized gas is discharged from the gas inlet 211 into the UFB storage tank 200 .

[0043] In the flow path switching joint 203, as shown in FIG. 3(b), the liquid 41 containing pressurized gas is instantly converted into UFB when it is discharged from the pressurized discharge inlet 212 (pressurized melting type).

[0044] By repeating the above operation several times in succession (or for a predetermined period of time) and automatically alternating between reduced pressure and increased pressure, it is possible to easily produce UFB-containing water containing the required number of UFBs.

[0045] FIG. 4 shows the results of an experiment on UFB water production using the UFB water production apparatus according to this embodiment in comparison with the conventional method.

[0046] The conditions for generating UFB water here were as follows: 100 ml of pure water was used as liquid 41, the number of decompression / pressurization switching strokes was set to 50 (generation time of approximately 3 minutes and 30 seconds), and the number of UFBs generated was counted using ultrasonic destruction method and / or freeze-thaw method.

[0047] In addition, the flow path switching joint part 203 of the pressurized drainage side type shown in Figures 3(a) and (b) is defined as this embodiment, and the case where this pressurized drainage side type flow path switching joint part is not used (without sphere) is defined as the conventional case.

[0048] FIG. 4 shows the results (three times) of the experiment under the above conditions and the average thereof, in which the white background shows the present embodiment and the hatched area shows the conventional example.

[0049] As is clear from this figure, in both cases, the number of UFBs generated was far greater in this embodiment than in the conventional method. In other words, by alternately switching between reduced pressure and increased pressure, UFBs could be generated efficiently.

[0050] The reason why there was variation in the number of UFBs generated is believed to be that the flow path (flow rate) of liquid 41 changes when sphere 220 moves within flow path switching joint 203 during reduced pressure generation (reduced pressure generation process) and pressurized generation (pressurized generation process).

[0051] It is also possible that the spheres 220 act as resistance in the flow path, generating vortex currents.

[0052] As described above, the UFB water generating device according to this embodiment is configured so that, when changing from normal pressure to reduced pressure, the reduced pressure generating unit 11 can instantly change the pressure inside the reduced pressure / pressurization chamber 100 from normal pressure to reduced pressure, and send the liquid 41 containing gas in a normal pressure state into the reduced pressure / pressurization chamber 100. As a result, the dissolved gas in the liquid 41 is instantly exposed to reduced pressure, and the state transitions to the UFB generation state.

[0053] On the other hand, in the pressurized generation section 21, when the pressure is increased to normal pressure, the flow path switching joint section 203 is repeatedly cycled from high pressure to normal pressure to high pressure, thereby making it possible to transition more dissolved gas to a state where UFB can be generated under high pressure conditions.

[0054] Therefore, it becomes possible to continuously generate a large amount of UFB in the reduced pressure generating unit 11 and the pressurized pressure generating unit 21, and the production capacity of UFB-containing water containing UFB can be easily improved.

[0055] Second Example FIG. 5 shows another example of the configuration of the flow path switching joint portion 203, in which FIG. 5(a) shows a state where a slight reduced pressure is reduced, and FIG. 5(b) shows a state where a pressurized pressure is increased to normal pressure.

[0056] This flow path switching joint section 203 is an example in which a sphere 221 that rises and falls in accordance with pressure changes within the joint is a mesh ball type (not fully enclosed type), as shown in, for example, FIGS. 5(a) and (b).

[0057] That is, the mesh ball type sphere 221 is, for example, a normal ball type sphere 220 with holes drilled at regular intervals on its surface. This makes it possible to narrow the flow path of the liquid 41 when it is pressurized and discharged from the water inlet 213 to any flow size according to the mesh.

[0058] In this way, by drilling holes to serve as a flow path for liquid 41 in sphere 221 that blocks water inlet 213 of flow path switching joint 203, it becomes possible to narrow water inlet 213 according to the flow size of sphere 221. Therefore, even without providing a pressurized drainage intake port, it becomes possible to easily apply the pressure difference required for UFB production to liquid 41 discharged from water inlet 213 to UFB storage tank 200.

[0059] That is, in this flow path switching joint portion 203, as shown in FIG. 5(b), for example, liquid 41 containing pressurized gas is instantly converted into UFB when it is discharged from the gap of the water inlet 213 (pressure melting type).

[0060] Example 3 FIG. 6 shows another example of the configuration of the flow path switching joint portion 203, in which FIG. 6(a) shows a state where a slight reduced pressure is reduced, and FIG. 6(b) shows a state where a pressurized pressure is increased to normal pressure.

[0061] This flow path switching joint part 203 is an example in which a sphere 222 that rises and falls in accordance with changes in pressure within the joint is a grooved ball type (not fully enclosed type), as shown in Figures 6(a) and (b).

[0062] That is, the grooved ball type sphere 222 is, for example, a normal ball type sphere 220 with grooves cut at regular intervals on its surface. This makes it possible to narrow the flow path of the liquid 41 when it is pressurized and discharged from the water inlet 213 to any flow diameter size according to the grooves.

[0063] In this way, by providing a groove on the surface of the sphere 222 that closes the water inlet 213 of the flow path switching joint 203 to serve as a flow path for the liquid 41, the water inlet 213 can be narrowed according to the flow size of the sphere 222. Therefore, even without providing a pressurized drainage intake port, it is possible to easily apply the pressure difference required for UFB production to the liquid 41 discharged from the water inlet 213 to the UFB storage tank 200.

[0064] That is, in this flow path switching joint portion 203, as shown in FIG. 6(b), for example, liquid 41 containing pressurized gas is instantly converted into UFB when it is discharged from the gap of the water inlet 213 (pressure melting type).

[0065] Example 4 FIG. 7 shows another example of the configuration of the flow path switching joint portion 203, in which FIG. 7(a) shows a state where a slight reduced pressure is reduced, and FIG. 7(b) shows a state where a pressurized pressure is increased to normal pressure.

[0066] This flow path switching joint part 203 is an example in which, instead of a sphere that rises and falls with changes in pressure within the joint, the opening / closing valve 223 that opens and closes the water inlet 213 is a mesh type (not completely closed type), as shown in Figures 7(a) and (b).

[0067] That is, the mesh-type on-off valve 223 is, for example, a flat on-off valve with holes drilled at regular intervals, which makes it possible to narrow the flow path of the liquid 41 when it is pressurized and discharged from the water inlet 213 to any flow diameter size.

[0068] In this way, by drilling a hole to serve as a flow path for liquid 41 in on-off valve 223 that closes water inlet 213 of flow path switching joint 203, it becomes possible to narrow water inlet 213 according to the flow size of on-off valve 223. Therefore, even without providing a pressurized drainage intake port, it becomes possible to easily apply the pressure difference required for UFB production to liquid 41 discharged from water inlet 213 to UFB storage tank 200.

[0069] That is, in this flow path switching joint portion 203, as shown in FIG. 7(b), for example, the liquid 41 containing pressurized gas is instantly converted into UFB when it is discharged through the gap of the on-off valve 223 (pressurized melting type).

[0070] Example 5 FIG. 8 shows another example of the configuration of the flow path switching joint portion 203, in which FIG. 8(a) shows a state where a slight reduced pressure is reduced, and FIG. 8(b) shows a state where a pressurized pressure is increased to normal pressure.

[0071] This flow path switching joint part 203 is an example in which, instead of a sphere that rises and falls with changes in pressure within the joint, the opening / closing valve 224 that opens and closes the water inlet 213 is of a sealed type (totally closed type), as shown in Figures 8(a) and (b).

[0072] That is, the sealed type on-off valve 224 is, for example, a flat on-off valve that opens the water inlet 213 when the pressure changes from normal to reduced pressure, and closes the water inlet 213 when the pressure changes from increased to normal pressure. This makes it easy to apply the pressure difference required for UFB production to the liquid 41 discharged from the pressurized wastewater inlet 212 to the UFB storage tank 200.

[0073] That is, in this flow path switching joint 203, as shown in FIG. 8(b), for example, the liquid 41 containing pressurized gas is instantly converted into UFB when it is discharged from the pressurized discharge inlet 212 (pressurized melting type).

[0074] Example 6 FIG. 9 shows another example of the configuration of the flow path switching joint portion 203, in which FIG. 9(a) shows a state where a slight reduced pressure is reduced, and FIG. 9(b) shows a state where a pressurized pressure is increased to normal pressure.

[0075] This flow path switching joint section 203 is an example of a type having a sphere 220 that rises and falls with changes in pressure within the joint, and has a variable pressure drain port diameter, as shown in Figures 9(a) and (b).

[0076] That is, the variable diameter pressurized drainage type is, for example, a type in which an adjustment port 231 that can change the diameter of the pressurized drainage inlet 212 is provided in the pressurized drainage inlet 212. This makes it easy to apply the pressure difference required for UFB production to the liquid 41 discharged from the adjustment port 231 of the pressurized drainage inlet 212 to the UFB storage tank 200 by narrowing the adjustment port 231 when changing from normal pressure to reduced pressure and loosening the adjustment port 231 when changing from pressurized to normal pressure.

[0077] That is, in this flow path switching joint portion 203, as shown in FIG. 9(b), for example, the liquid 41 containing pressurized gas is instantly converted into UFB when it is discharged from the narrowed adjustment port portion 231 (pressure melting type).

[0078] This variable pressure drain port diameter type is not limited to the flow path switching joint part 203 using the sphere 220, but can also be applied to a flow path switching joint part 203 equipped with a sealed type opening / closing valve 224 as shown in Figures 8(a) and (b), for example.

[0079] In addition, in either case of the configuration, the present invention can be applied to various flow path switching joint parts 203 that include the gas-liquid mixing part 202 either integrally or separately.

[0080] Furthermore, the dissolved gas may be, for example, ozone, oxygen, nitrogen, or various medical gases.

[0081] The above describes aspects of the present invention by illustrating several embodiments. However, 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]

[0082] 11 Pressure reduction generating section 21 Pressure generating section 31 Pipeline 100 Syringe-type decompression and pressurization chamber (first pressure difference generating unit) 102 Syringe (outer cylinder) 103 Plunger (pusher / piston) 110 Drive unit 112 Disk 113 Motor 114 Axial rod 200 UFB storage tank 202 Gas-liquid mixing section 203 Flow path switching joint (water pressure automatic switching joint / second pressure difference generating part) 210 Floating prevention rod 211 Gas Inlet 212 Pressurized drainage intake 213 Water inlet (opening) 220 Sphere (normal ball type) 221 Sphere (Mesh Ball Type) 222 Sphere (grooved ball type) 223 On-off valve (mesh type) 224 On-off valve (sealed type) 231 Adjustment port (pressurized drainage port diameter variable type)

Claims

1. A tank for storing liquid; a syringe-type first pressure difference generating unit having an outer cylinder and a plunger, the first pressure difference generating unit being provided outside the water tank and configured to generate bubbles from the gas dissolved in the liquid in the water tank; A drive unit that causes the plunger of the first pressure difference generating unit to perform a continuous reciprocating motion; a gas-liquid mixing unit connected to the first pressure difference generating unit and configured to mix the gas in the water tank with the liquid fed into or discharged from the first pressure difference generating unit; a second pressure difference generating unit that is connected to the first pressure difference generating unit via the gas-liquid mixing unit and whose pressure state is switched in conjunction with the first pressure difference generating unit, thereby generating bubbles of gas dissolved in the liquid in the water tank as the liquid is introduced into or drawn out from the water tank; A bubble water generating device comprising:

2. The bubble water generating device described in claim 1, characterized in that the first pressure difference generating unit generates bubble water containing ultra-fine bubbles in response to the pressure difference when transitioning from a normal pressure state to a reduced pressure state, and the second pressure difference generating unit generates bubble water containing ultra-fine bubbles in response to the pressure difference when transitioning from a pressurized state to a normal pressure state.

3. The second pressure difference generating unit is an opening provided at the bottom for taking in the liquid in the water tank; a fully enclosed sphere that rises and falls in response to changes in internal pressure to open and close the opening; a drain inlet provided on a side for draining the liquid into the water tank; The bubble water generating device according to claim 1, further comprising:

4. The second pressure difference generating unit is an opening provided at the bottom for taking in the liquid in the water tank; A non-closed sphere that rises and falls in response to changes in internal pressure to control the opening and closing of the opening; The bubble water generating device according to claim 1, further comprising:

5. The second pressure difference generating unit is an opening provided at the bottom for taking in the liquid in the water tank; a fully closed valve that opens and closes the opening in response to a change in internal pressure; a drain inlet provided on a side for draining the liquid into the water tank; The bubble water generating device according to claim 1, further comprising:

6. The second pressure difference generating unit is an opening provided at the bottom for taking in the liquid in the water tank; a non-fully closing valve that controls opening and closing of the opening in response to a change in internal pressure; The bubble water generating device according to claim 1, further comprising:

7. The second pressure difference generating unit is an opening provided at the bottom for taking in the liquid in the water tank; a fully enclosed sphere that rises and falls in response to changes in internal pressure to open and close the opening; a drainage inlet having a variable diameter provided on a side portion for discharging the liquid into the water tank; The bubble water generating device according to claim 1, further comprising:

8. A method for generating bubble water containing ultra-fine bubbles using the bubble water generating device according to any one of claims 1 to 7, comprising: A first pressure difference generating unit is provided outside a water tank that stores liquid, and the first pressure difference generating unit has a syringe shape and an outer cylinder and a plunger. The plunger is continuously reciprocated by a drive unit to generate bubbles of gas dissolved in the liquid in the water tank in response to a pressure difference when the liquid transitions from a normal pressure state to a reduced pressure state. a second pressure difference generating unit that is provided inside the water tank and whose pressure state is switched in conjunction with the first pressure difference generating unit, turns the gas dissolved in the liquid in the water tank into bubbles in response to a pressure difference when the pressure difference is changed from a pressurized state to a normal pressure state via a gas-liquid mixing unit; A method for generating bubble water.

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