WO2019069350A1

WO2019069350A1 - Air bubble generator and air bubble generation method

Info

Publication number: WO2019069350A1
Application number: PCT/JP2017/035830
Authority: WO
Inventors: 東吾保坂
Original assignee: ＨａｃｋＪａｐａｎホールディングス株式会社
Priority date: 2017-10-02
Filing date: 2017-10-02
Publication date: 2019-04-11
Also published as: JPWO2019069350A1

Abstract

An air bubble generator which generates fine air bubbles in a gas-containing liquid that is obtained by mixing a gas and a liquid with each other, and which is provided with an air bubble generation module that comprises: a first cylindrical part which is provided with a plurality of through holes; and a second cylindrical part which has an inner diameter that is larger than the outer diameter of the first cylindrical part, while covering the first cylindrical part, and into which the gas-containing liquid discharged through the through holes of the first cylindrical part flows. The second cylindrical part is provided with a second through hole through which the gas-containing liquid is discharged from the inside of the second cylindrical part to the outside of the second cylindrical part.

Description

Bubble generation device, bubble generation method

The present invention relates to an air bubble generation device and an air bubble generation method, and more particularly to an air bubble generation device and an air bubble generation method for generating a liquid containing fine air bubbles such as nano bubbles.

Techniques for generating fine bubbles such as nanobubbles are known.

For example, Patent Document 1 describes a gas-containing liquid generating device having a gas-liquid mixing unit that generates a gas-containing liquid by mixing a gas and a liquid, a gas-containing liquid processing unit, and a bubble generation unit. Specifically, the gas generating unit includes a housing, an opening and closing member, an elastic member, and a support. In addition, the gap between the opening and closing member and the support portion is configured such that the flow of the gas-containing liquid causes the opening and closing member to move downstream, and the elastic force reduces the opening and closing member by moving upstream. The gas generating unit is configured to flow the gas-containing liquid from the inlet to the outlet through the gap. According to Patent Document 1, it is possible to generate a gas-containing liquid containing fine bubbles at a high concentration by the above configuration.

JP, 2016-203109, A

There has been a demand for stably generating finer bubbles depending on the application using the bubbles. However, with the technology as described in Patent Document 1, it may not always be possible to stably generate fine bubbles.

As such, there has been a problem that it is difficult to stably generate fine bubbles.

Therefore, an object of the present invention is to provide an air bubble generating device and an air bubble generating method that solve the problem that it is difficult to stably generate fine air bubbles.

In order to achieve such an object, a bubble generating apparatus which is an embodiment of the present invention is
A bubble generating device that generates minute bubbles in a gas-containing liquid in which a gas and a liquid are mixed,
A first cylindrical portion in which a plurality of through holes are formed, and an inner diameter thicker than the outer diameter of the first cylindrical portion, covering the first cylindrical portion, the first cylindrical portion And b) a second tubular portion into which the gas-containing liquid discharged from the through hole formed in the inflows into the inside;
The second tubular portion has a configuration in which a second through hole through which the gas-containing liquid flows from the inside to the outside of the second tubular portion is formed.

Moreover, the bubble generation method which is another form of the present invention is
A bubble generating method performed by a bubble generating device for generating minute bubbles in a gas-containing liquid in which a gas and a liquid are mixed,
After flowing into the inside of the first cylindrical portion in which a plurality of through holes are formed, the diameter is thicker than the outer diameter of the first cylindrical portion through the through holes of the first cylindrical portion. After the gas-containing liquid flows to the second cylindrical portion having the inner diameter and covering the first cylindrical portion, the second through hole formed in the second cylindrical portion is used to perform the second operation. The gas-containing liquid flows from the inside to the outside of the cylindrical part of

ADVANTAGE OF THE INVENTION this invention becomes possible to provide the bubble generation apparatus which solves the problem that it is difficult to produce | generate a micro bubble stably, and a bubble generation method by being comprised as mentioned above.

It is a figure which shows an example of the whole structure of the bubble generation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the gas-liquid mixing part shown in FIG. It is a figure which shows an example of a structure of the bubble generation part shown in FIG. It is a figure which shows an example of a structure of the partition plate shown in FIG. It is a figure which shows an example of a structure of the bubble generation module shown in FIG. It is a figure which shows an example of a structure of the projection part in the bubble generation module shown in FIG. It is a figure which shows an example of the flow of the gas containing liquid in a gas containing liquid process part in 1st Embodiment. It is a figure which shows an example of the other structure of a partition plate. It is a figure which shows an example of the other structure of a partition plate. It is a figure which shows an example of the other structure of a gas-containing liquid process part. It is a figure which shows an example of a structure of the bubble generation module in 2nd Embodiment. It is a figure which shows an example of the mode of the through-hole shown in FIG. It is a figure which shows an example of the flow of the gas containing liquid in a gas containing liquid process part in 2nd Embodiment. It is a figure which shows the other application example of the bubble generation module in 2nd Embodiment.

First Embodiment
A first embodiment of the present invention will be described with reference to FIGS. 1 to 10. FIG. 1 is a view showing an example of the entire configuration of the air bubble generation device 1. FIG. 2 is a view showing an example of the configuration of the gas-liquid mixing unit 2. FIG. 3 is a diagram showing an example of the configuration of the bubble generation unit 3. FIG. 4 is a view showing an example of the configuration of the partition plate 32. As shown in FIG. FIG. 5 is a diagram showing an example of the configuration of the bubble generation module 33. As shown in FIG. FIG. 6 is a view showing an arrangement example of the projections 3321 in the air bubble generation module 33. As shown in FIG. FIG. 7 is a view showing an example of the flow of the gas-containing liquid in the gas-containing liquid processing unit 31. As shown in FIG. 8 and 9 are diagrams showing an example of another configuration of the partition plate 32. FIG. FIG. 10 is a diagram showing an example of another configuration of the gas-containing liquid processing unit.

In the first embodiment, a bubble generating apparatus 1 that generates nanobubbles in a gas-containing liquid in which a gas such as air and a liquid such as water are mixed will be described. The bubble generation device 1 in the present embodiment includes a bubble generation unit 3 having a gas-containing liquid processing unit 31 having a partition plate 32 and a bubble generation module 33, and a throttling unit 34. As will be described later, the partition plate 32 in the present embodiment is a space on the flow path 41 side that functions as an inflow path of the gas containing liquid to the gas containing liquid processing part 31 in the space inside the gas containing liquid processing part 31 It is divided into two spaces of a first space) and a space (second space) on the flow path 42 side functioning as a discharge path of the gas-containing liquid from the gas-containing liquid processing unit 31. Further, through holes 321 for mounting the air bubble generation module 33 are formed in the partition plate 32, and the air bubble generation module 33 is fixed to the partition plate 32 by mounting the air bubble generation module 33 in the through holes 321. You can do it. With such a configuration, the gas-containing liquid that has entered the inside of the gas-containing liquid processing unit 31 through the flow path 41 that functions as the inflow path flows in the bubble generation module 33 and then functions as a discharge path. It moves to the space on the side of the passage 42 and flows out of the flow passage 42 to the outside of the gas-containing liquid processing unit 31.

First, with reference to FIG. 1, the outline | summary of the whole structure of the bubble generation apparatus 1 is demonstrated. FIG. 1 shows an example of the entire configuration of the air bubble generation device 1. Referring to FIG. 1, the bubble generating device 1 has a gas-liquid mixing unit 2 and a bubble generating unit 3.

As shown in FIG. 1, the gas-liquid mixing unit 2 is supplied with a fluid such as water via a fluid inlet. Moreover, gas, such as air, is supplied to the gas-liquid mixing part 2 via a gas inflow port. The gas-liquid mixing unit 2 mixes the supplied fluid and gas to generate a gas-containing liquid.

Further, the gas-liquid mixing unit 2 and the bubble generation unit 3 are connected via a flow path. The gas-containing liquid generated by the gas-liquid mixing unit 2 is supplied to the bubble generation unit 3 through the flow path.

The bubble generation unit 3 generates nano bubbles in the supplied gas-containing liquid by performing predetermined processing. The nano bubble is a fine bubble having a particle size of 1 micrometer or less in the nanometer (nm) unit, for example, a particle size of about 50 to 500 nm. The nano bubble water which is a gas-containing liquid containing nano bubbles generated by the bubble generation unit 3 is discharged to the outside of the bubble generation device 1 through the discharge port.

The above is the outline | summary of the whole structure of the bubble generation apparatus 1. FIG.

The above description is merely an example. The bubble generation device 1 may have a configuration other than that exemplified above. For example, by connecting the outlet shown in FIG. 1 to the fluid inlet through the formation tank (not shown) or the like, the bubble-generating apparatus 1 circulates the gas-containing liquid and the nanobubble water inside the bubble-generating apparatus 1. You may configure it. In addition, for example, the bubble generation device 1 may be configured to be supplied with a fluid such as water from the outside through the fluid inlet, and configured to discharge nanobubble water to the outside through the outlet. Absent. In addition, the air bubble generation device 1 can have various known configurations such as various sensors such as a pressure gauge, and a valve that prevents backflow in the flow path.

Then, the detail of each structure which comprises the bubble generation apparatus 1 is demonstrated. First, the configuration of the gas-liquid mixing unit 2 will be described with reference to FIG.

FIG. 2 shows an example of the configuration of the gas-liquid mixing unit 2. Referring to FIG. 2, the gas-liquid mixing unit 2 includes an ejector 23 and a pump 25. Further, in the gas-liquid mixing unit 2, a channel 21, a channel 22, a channel 24, and a channel 26 are formed.

The channel 21 has a fluid inlet formed at one end, and the ejector 23 is connected to the other end. Further, the ejector 23 is connected to one end of the flow path 24 and the pump 25 is connected to the other end. In addition, one end of the flow path 26 is connected to the pump 25, and the bubble generation unit 3 is connected to the other end of the flow path 26. As described above, in the gas-liquid mixing unit 2, the flow path 21, the ejector 23, the flow path 24, the pump 25, and the flow path 26 are connected to form a flow path through which a fluid such as water flows. That is, according to the above configuration, the pump 25 sucks fluid such as water via the flow path formed by the flow path 21, the ejector 23, and the flow path 24. Further, the pump 25 discharges the sucked fluid to the flow path 26.

Further, the flow passage 22 is connected to the ejector 23. The flow path 22 forms a flow path of gas in which a gas inlet is formed at one end and an ejector 23 is formed at the other end.

The ejector 23 is formed with a throttling portion or the like, which is a portion where the inner diameter is smaller than the inner diameter of the flow path 21, the flow path 24 and the like. The ejector 23 supplies a gas such as air supplied via the flow path 22 to the flow path through which the above-mentioned fluid flows by utilizing the Venturi effect. As described above, the gas-liquid mixing unit 2 mixes the gas with the fluid to generate the gas-containing liquid by supplying the gas to the flow path in which the fluid flows using the ejector 23.

As described above, the gas-liquid mixing unit 2 has a configuration for mixing the liquid and the gas to generate the gas-containing liquid. In the present embodiment, the specific configuration of the gas-liquid mixing unit 2 is not particularly limited. The gas-liquid mixing unit 2 may adopt various known variations.

Subsequently, the configuration of the bubble generation unit 3 will be described with reference to FIGS. 3 to 10. FIG. 3 is a diagram showing an example of the configuration of the bubble generation unit 3. Referring to FIG. 3, the bubble generation unit 3 has a gas-containing liquid processing unit 31 and a throttling unit 34. As described later, after the bubble generation unit 3 performs predetermined processing in the gas-containing liquid processing unit 31, for example, the air bubble generation unit 3 passes the throttling unit 34 in which a throttle is formed to narrow the width of the flow path Thus, nano bubbles are generated in the gas-containing liquid. As described above, in the bubble generating unit 3, nano bubbles are generated in the gas-containing liquid in the gas-containing liquid processing unit 31 and the throttling unit 34. Further, in the bubble generation unit 3, a flow passage 41, a flow passage 42 and a flow passage 43 are formed.

One end of the flow passage 41 is connected to the gas-liquid mixing unit 2, and the other end of the flow passage 41 is connected to the gas-containing liquid processing unit 31. That is, the gas-containing liquid discharged through the flow path 26 is supplied to the gas-containing liquid processing unit 31 through the flow path 41. Further, the flow path 42 is connected to the gas-containing liquid processing unit 31, and the other end of the flow path 42 is connected to the throttling unit 34. Further, the flow path 43 is connected to the narrowed portion 34, and the other end of the flow path 43 is formed with a discharge port.

With such a configuration, the gas-containing liquid processing unit 31 is supplied with the gas-containing liquid generated in the gas-liquid mixing unit 2 through the flow path 41. Further, the gas-containing liquid discharged from the gas-containing liquid processing unit 31 is supplied to the throttling unit 34 through the flow channel 42, and the gas-containing liquid having passed through the throttling unit 34 is discharged to the outside through the flow channel 43 Be done. That is, the flow path 41 has a function as an inflow path for flowing the gas-containing liquid into the gas-containing liquid processing unit 31, and the flow path 42 serves as a discharge path for discharging the gas from the gas-containing liquid processing unit 31. Have the function of Further, the flow path 42 has a function as an inflow path for introducing the gas-containing liquid into the throttling portion 34, and the flow path 43 has a function as a discharge path for discharging the gas from the throttling portion 34 There is.

The gas-containing liquid processing unit 31 has, for example, a substantially cylindrical shape having a cavity inside. In the gas-containing liquid processing unit 31, a partition plate 32 (partition member) on which the bubble generation module 33 is mounted is fixed. Further, a channel 41 and a channel 42 are formed on the side surface of the gas-containing liquid processing unit 31.

For example, the gas-containing liquid processing unit 31 has a cylindrical first cylindrical portion 311 (first housing) having a flange 3111 formed at one end and an end face 3112 formed at the other end. And a second cylindrical portion 312 (second housing) having a cylindrical shape, in which a flange 3121 is formed at one end and an end face 3122 is formed at the other end. Further, the end of the flow passage 41 is connected at a predetermined side surface of the first cylindrical portion 311, and the end of the flow passage 42 is connected at a predetermined predetermined side surface of the second cylindrical portion 312. The gas-containing liquid processing unit 31 sandwiches the outer peripheral side portion of the partition plate 32 described later between the flange 3111 formed in the first cylindrical portion 311 and the flange 3121 formed in the second cylindrical portion 312. It is formed by connecting the first cylindrical portion 311 and the second cylindrical portion 312 by the connecting member 313 in the flexed state. The connecting member 313 is, for example, a nut or a bolt. The connecting member 313 is inserted into the through holes formed in the flange 3111 and the flange 3121 and the fixing through holes 322 formed in the partition plate 32, whereby the first cylindrical portion 311 and the second cylindrical portion are formed. And 312 are linked.

As shown in FIG. 3, the length of the side surface of the second cylindrical portion 312 is longer than the length of the side surface of the first cylindrical portion 311. Further, the flow path 41 formed on the side surface of the first cylindrical portion 311 and the flow path 42 formed on the side surface of the second cylindrical portion 312 are formed, for example, in the vicinity of the flange 3111 and the flange 3121 There is. Due to such a configuration, the length from the end face 3122 of the second cylindrical portion 312 to the flow path 42 in the gas-containing liquid processing unit 31 is the length from the end face 3112 of the first cylindrical portion 311 to the flow path 41 It is longer than the length.

The partition plate 32 is a plate-like member having a substantially circular shape in a front view. The partition plate 32 is fixed to the gas-containing liquid processing unit 31 to divide the internal space of the casing constituting the gas-containing liquid processing unit 31 into two spaces. Specifically, the partition plate 32 discharges the gas-containing liquid, and the space in the casing constituting the gas-containing liquid processing unit 31 is a first space on the flow path 41 side that functions as an inflow path of the gas-containing liquid. It divides into the 2nd space by the side of the flow path 42 which functions as a path | route. In other words, the partition plate 32 is configured such that the space in the gas-containing liquid processing unit 31 is a first space which is a space on the side of the first cylindrical portion 311 and a space which is on the side of the second cylindrical portion 312. Divide into two spaces. As described above, the length of the side surface of the second tubular portion is longer than the length of the side surface of the first tubular portion 311. Therefore, the internal space is wider in the second space than in the first space.

FIG. 4 shows an example of the configuration of the partition plate 32. As shown in FIG. Referring to FIG. 4, the partition plate 32 is formed with a plurality of through holes 321 and a plurality of fixing through holes 322. For example, in the case of FIG. 4, in the partition plate 32, three through holes 321 and eight fixing through holes 322 are formed.

The through holes 321 are through holes used when the air bubble generation module 33 is attached to the partition plate 32. That is, the air bubble generation module 33 is attached to the through hole 321. Although the method of mounting the air bubble generation module 33 in the through hole 321 is not particularly limited, for example, a screw method, welding, or the like may be adopted. Alternatively, for example, the air bubble generation module 33 having an external thread formed on the outer peripheral surface is screwed into an internal thread formed on the inner peripheral surface of the through hole 321 and the air bubble generation module 33 is inserted to a predetermined position and then welded. For example, a combined method of screw and welding may be adopted. The size of the through hole 321 is, for example, about 20 to 30 mm in diameter, but may be a size other than those illustrated. Referring to FIG. 4, the through holes 321 are formed at equal intervals, for example, in the vicinity of the center of the partition plate 32.

The fixing through holes 322 are through holes used when the partition plate 32 is fixed to the gas-containing liquid processing unit 31. The connecting member 313 is inserted into the fixing through hole 322. The fixing through holes 322 are formed on the outer peripheral side of the partition plate 32 and at positions corresponding to the formation positions of the through holes formed in the flange 3111 and the flange 3121. The size of the fixing through hole 322 corresponds to the size of the connecting member 313. The number of fixing through holes 322 may be changed according to the number of through holes formed in the flange 3111 and the flange 3121.

The partition plate 32 has, for example, the configuration as described above. Thus, the partition plate 32 divides the inside of the casing constituting the gas-containing liquid processing unit 31 into the first space and the second space, and is configured to be able to fix the bubble generation module 33. . By having the configuration described above, the partition plate 32 is fixed to the gas-containing liquid processing unit 31 using the fixing through holes 322. In addition, the air bubble generation module 33 is attached to the through hole 321 formed in the partition plate 32.

The bubble generation module 33 is a cylindrical module having a space inside. In the air bubble generation module 33, the inlet to the air bubble generation module 33 is located on the flow path 41 side (in the first space), and the outlet from the air bubble generation module 33 is on the flow path 42 side (second space Is fixed to the partition plate 32 in the state of being located inside). Due to such a state, the gas-containing liquid supplied from the one end of the bubble generation module 33 to the inside of the bubble generation module 33 passes through the inside of the bubble generation module 33, and then the bubble generation module 33. It is discharged to the outside from the other end of the In other words, after the gas-containing liquid supplied into the first space of the gas-containing liquid processing unit 31 via the flow path 41 passes through the inside of the bubble generation module 33, the gas-containing liquid processing unit 31 It reaches within our second space. Thus, the bubble generation module 33 has a cylindrical shape through which the gas-containing liquid can pass.

FIG. 5 shows an example of the configuration of the bubble generation module 33. Specifically, FIG. 5 (A) shows an example of the configuration of the bubble generation module 33, and FIGS. 5 (B) and 5 (C) show another example of the configuration of the bubble generation module 33. ing. The air bubble generation module 33 shown in FIG. 5A may be attached to the partition plate 32. The air bubble generation module 33 shown in FIG. 5B or the air bubble generation module 33 shown in FIG. 5C. May be worn. One or a combination of the bubble generation modules 33 shown in FIGS. 5A, 5B, and 5C may be attached to the partition plate 32.

Referring to FIG. 5A, the bubble generation module 33 is configured of, for example, a spiral flow channel 331 and a protrusion 332.

The spiral flow channel 331 is a flow channel formed in a spiral shape. The gas-containing liquid that has entered the inside of the bubble generation module 33 passes through the spiral flow channel 331 to form a spiral flow. The spiral flow channel 331 may have a configuration other than the spiral flow channel, such as a blade that rotates as long as a spiral flow can be formed.

In the protrusion 332, a plurality of protrusions 3321 are formed. The protrusion 3321 is, for example, a screw. The protrusion 3321 is fixed to the air bubble generation module 33 by being screwed into the air bubble generation module 33 having a cylindrical shape. The protrusion 3321 may be welded to the air bubble generation module 33.

FIG. 6 shows an example of the positional relationship of the projections 3321 to be screwed in the projections 332. Specifically, FIG. 6 (A) shows an example of the positional relationship of the projections 3321, and FIG. 6 (B) shows another example of the positional relationship of the projections 3321. Referring to FIG. 6A, in the projection 332, projections 3321 are formed at each position of 0 °, 120 °, and 240 °, for example, with the upper side of FIG. 6A being 0 °. Further, referring to FIG. 6B, for example, projections 3321 are formed at each of 60 degrees, 180 degrees, and 300 degrees. As described above, the protrusion 332 is formed by a plurality of sets of three protrusions 3321 as one set.

For example, in the case shown in FIG. 5, the protrusion 332 is formed by six sets (that is, 18 protrusions 3321). Further, in the protrusions 332, for example, the protrusions 3321 are formed at the respective positions so that the positional relationship between the protrusions 3321 differs between adjacent sets. Specifically, for example, a set in which the protrusions 3321 are screwed in the positional relationship shown in FIG. 6A, and a set in which the protrusions 3321 are screwed in the positional relationship shown in FIG. The protrusion 332 is configured.

Note that as long as the positional relationship between the protrusions 3321 is different between adjacent sets, the protrusions 3321 may be formed in a positional relationship other than the positional relationship as shown in FIGS. 6A and 6B. Also, the number of protrusions 3321 in one set is not limited to three. For example, the number of the projections 3321 in one set may be one or two, or four or more.

As described above, the bubble generation module 33 is configured of, for example, the spiral flow channel 331 and the protrusion 332 configured of six sets. The air bubble generation module 33 may adopt various known variations. For example, in the protrusion 332, one or more V-shaped grooves may be formed at places other than the places where the protrusions 3321 are provided.

Further, the bubble generation module 33 may have a configuration as shown in FIG. 5 (B). Referring to FIG. 5B, the air bubble generation module 33 is configured of, for example, a spiral channel 331, a protrusion 332, and a throttling portion 333. In the case of the air bubble generation module 33 shown in FIG. 5B, a part of the protrusion 332 is replaced with the narrowed portion 333 as compared with the case shown in FIG. 5A. In other words, in the case illustrated in FIG. 5B, the air bubble generation module 33 is configured of, for example, a spiral flow path 331, a protrusion 332 configured by three sets, and a throttling portion 333.

The throttling portion 333 is a portion where the inside diameter of the bubble generation module 33 is smaller than that of the protrusion 332. As shown in FIG. 5, the narrowed portion 333 is formed so that the inner diameter gradually narrows toward the downstream side and then gradually increases as the inner diameter proceeds from the first portion to the downstream side. The specific configuration of the diaphragm unit 333 is not particularly limited in the case shown in FIG. 5 (B). The narrowed portion 333 may have a shape other than that illustrated in FIG. 5B as long as the flow path of the gas-containing liquid is narrowed such that the inner diameter is narrowed in the narrowed portion 333.

Further, the bubble generation module 33 may have a configuration as shown in FIG. 5 (C). Referring to FIG. 5C, the bubble generation module 33 includes, for example, a spiral flow passage 331 and a protrusion 332. In the case shown in FIG. 5C, the number of sets constituting the projection 332 is smaller than in the case shown in FIG. 5A. That is, when it shows in FIG.5 (C), the bubble generation module 33 is comprised from the helical flow path 331 and the projection part 332 comprised from three groups, for example.

The bubble generation module 33 has, for example, the configuration as described above.

According to the configuration as described above, the flow of the gas-containing liquid inside the gas-containing liquid processing unit 31 is, for example, as shown in FIG. Referring to FIG. 7, the gas-containing liquid supplied to the inside of the gas-containing liquid processing unit 31 via the flow path 41 flows from the first space to the inside of the bubble generation module 33. Specifically, the gas-containing liquid flows into the spiral channel 331 forming the bubble generation module 33. This creates a helical flow. Further, the gas-containing liquid in which the spiral flow is formed passes through the inside of the bubble generation module 33 while colliding with the projections 3321 formed on the projections 332, and then flows to the second space. At this time, the first space and the second space are separated by the partition plate 32. Therefore, the gas-containing liquid does not flow from the first space to the second space without passing through the inside of the bubble generation module 33. In the second space, the gas-containing liquid discharged from the end of the bubble generation module 33 is prevented from advancing by the end face 3122 or the like, and forms turbulent flow in the second space. Thereafter, the gas-containing liquid subjected to the processing by the bubble generation module 33 is discharged from the flow path 42 connected to the vicinity of the partition plate 32 in the second space to the outside of the gas-containing liquid processing unit 31. As described above, the flow path 42 is fixed in the vicinity of the partition plate 32 so that the length from the end face 3122 of the second cylindrical portion 312 to the flow path 42 becomes long. With such a configuration, it is possible to prevent the gas-containing liquid discharged from the bubble generation module 33 from flowing directly to the flow channel 42 without forming a turbulent flow. As a result, sufficient turbulence can be formed in the second space, and a larger amount of nanobubbles can be generated more stably.

The throttling portion 34 is configured such that the gas-containing liquid passes through a portion narrower than the flow path 42, the flow path 43 or the like, for example, the inner diameter is smaller than the inner diameter of the flow path 42 or the flow path 43. That is, the throttling unit 34 is configured to restrict the flow of the gas-containing liquid. In the present embodiment, the specific configuration of the diaphragm unit 34 is not particularly limited. The throttling portion 34 has, for example, a housing, a sphere and a spring, and the sphere is pushed by the flow of the gas-containing liquid so that the gas-containing liquid flows in the gap formed between the housing and the sphere It does not matter if it has the following configuration. In the case of the above configuration, the size of the gap between the housing and the sphere is adjusted by the flow speed of the gas-containing liquid and the force for pushing back the sphere by the spring. Further, the throttling portion 34 may be configured to have a throttling formed so as to narrow the inner diameter toward the downstream. The throttling portion 34 may be configured to be adjustable so that the gas-containing liquid flows in one or a plurality of throttling portions, for example, according to the flow rate of the gas-containing liquid. The throttling unit 34 may have another known configuration.

The above is an example of the configuration of the bubble generation unit 3.

As described above, the air bubble generation device 1 in the present embodiment includes the air bubble generation unit 3 including the gas-containing liquid processing unit 31 including the partition plate 32 and the air bubble generation module 33, and the throttling unit 34. With such a configuration, the gas-containing liquid that has entered the inside of the gas-containing liquid processing unit 31 via the flow path 41 that functions as the inflow path flows into the air bubble generation module 33 and then functions as a discharge path. It moves to the second space, which is the space on the side of the passage 42, and flows out of the flow passage 42 to the outside of the gas-containing liquid processing unit 31. The gas-containing liquid that has flowed out of the gas-containing liquid processing unit 31 passes through the throttling unit 34. As described above, when the gas-containing liquid passes through the bubble generation module 33, the second space, and the throttling portion 34, collision of the gas-containing liquid, pressure fluctuation, and the like occur to generate a large amount of nanobubbles in the gas-containing liquid. It will be done.

Further, according to the present embodiment, the number of the bubble generation modules 33 connecting the first space and the second space can be easily adjusted by properly using the partition plates 32 having different numbers of through holes 321. . As a result, it is possible to easily adjust the amount of nanobubble water produced.

For example, by fixing the partition plate 32 provided with only one through hole 321 as shown in FIG. 8 to the gas-containing liquid processing unit 31, the inside of the gas-containing liquid processing unit 31 for only one bubble generation module 33 It can be formed into On the other hand, for example, by fixing the partition plate 32 provided with five through holes 321 as shown in FIG. 9 to the gas-containing liquid processing unit 31, the inside of the gas-containing liquid processing unit 31 It can be formed into Thus, by changing the partition plate 32 fixed to the gas-containing liquid processing unit 31, it is possible to easily adjust the generation amount of nanobubble water. As described above, the number of the through holes 321 formed in the partition plate 32 may be one or more arbitrary number.

Note that the diameter of the gas-containing liquid processing unit itself may be changed according to the number of the bubble generation modules 33 formed inside the gas-containing liquid processing unit 31. For example, FIG. 10 shows an example of the gas-containing liquid processing unit 35 that the bubble generating unit 3 can have in place of the gas-containing liquid processing unit 31.

Referring to FIG. 10, the gas-containing liquid processing unit 35 includes a partition plate 32 and a bubble generation module 33. The configurations of the partition plate 32 and the bubble generation module 33 are substantially the same as those described above. Therefore, the detailed description is omitted. In the case of the gas-containing liquid processing unit 35, the partition plate 32 is fixed by being sandwiched by the gas-containing liquid processing unit 35. Therefore, the fixing through holes 322 are not provided in the partition plate 32. As described above, the fixing through holes 322 may not necessarily be formed in the partition plate 32.

Further, in the case shown in FIG. 10, the flow passage 41 is connected not to the side surface of the first cylindrical portion 351 but to the end surface having a hemispherical shape. As described above, when the number of the bubble generation modules 33 is one or two, the flow path 41 may be connected to the end face of the first cylindrical portion 351. On the other hand, the flow channel 42 is formed on the side surface of the second cylindrical portion 352. In other words, even in the case where the flow path 41 is connected to the end face, it is desirable that the flow path 42 be connected not to the hemispherical end face of the second cylindrical portion 352 but to the side face near the partition plate 32. With this configuration, after the turbulent flow occurs in the second cylindrical portion 352 after the bubble generation module 33, the gas-containing liquid can be discharged out of the gas-containing liquid processing unit 35. . This makes it possible to generate nanobubbles in the gas-containing liquid more stably.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIGS. 11 to 14. FIG. 11 is a diagram showing an example of the configuration of the bubble generation module 5. FIG. 12 is a view showing an example of the through hole 511. As shown in FIG. FIG. 13 is a view showing an example of the flow of the gas-containing liquid in the gas-containing liquid processing unit 31 in the second embodiment. FIG. 14 is a view showing another application example of the bubble generation module 5.

In the second embodiment of the present invention, another configuration example of the bubble generation module 33 described in the first embodiment will be described. As will be described later, the air bubble generation module 5 described in the present embodiment can be attached to the partition plate 32 instead of the air bubble generation module 33. When a plurality of modules can be attached to the partition plate 32, the bubble generation module 33 and the bubble generation module 5 may be attached to the partition plate 32 at the same time.

FIG. 11 shows an example of the configuration of the bubble generation module 5 that can be used instead of the bubble generation module 33. Referring to FIG. 11, the air bubble generation module 5 has an inner diameter larger than the outer diameter of the first cylindrical portion 51 and the first cylindrical portion 51, and the first cylindrical portion 51 is formed in the internal space. And the second cylindrical portion 52 to which the first cylindrical portion 51 is fixed (that is, to cover the first cylindrical portion 51) in a state in which the second cylindrical portion 52 is inserted. In addition, the outer diameter (for example, the outer diameter of the 2nd cylindrical part 52) of the bubble generation module 5 whole is equal to the outer diameter of the bubble generation module 33 whole, for example. Therefore, the air bubble generation module 5 can be attached to the through hole 321 formed in the partition plate 32 instead of the air bubble generation module 33.

The first tubular portion 51 has a cylindrical shape in which one end is open and the other end is closed. Further, a plurality of through holes 511 are formed on the side surface of the first cylindrical portion 51. The size of the through hole 511 is, for example, about 1 mm in diameter. The size of the through hole 511 may be other than that illustrated.

FIG. 12 shows an example of the positional relationship of the through holes 511 formed on the side surface of the first cylindrical portion 51. As shown in FIG. Specifically, FIG. 12A shows an example of the positional relationship of the through holes 511, and FIG. 12B shows another example of the positional relationship of the through holes 511. As shown in FIG. Further, FIG. 12C shows another configuration example of the through hole 511. Referring to FIG. 12A, in the first cylindrical portion 51, with the upper side of FIG. 12A being 0 degree, for example, the through holes 511 are provided at each position of 0 degree, 120 degrees, and 240 degrees. It is formed. Further, referring to FIG. 12B, for example, through holes 511 are formed at each of 60 degrees, 180 degrees, and 300 degrees. Thus, the through holes 511 are formed in the first cylindrical portion 51 in a plurality of sets, for example, with the three through holes 511 as one set.

In the first cylindrical portion 51, for example, the through holes 511 are formed in the respective portions so that the positional relationship between the through holes 511 is different between adjacent sets. Specifically, for example, a pair in which the through holes 511 are formed in the positional relationship shown in FIG. 12A, and a pair in which the through holes 511 are formed in the positional relationship shown in FIG. 12B mutually appear. Thus, the first tubular portion 51 is configured. In the present embodiment, the number of sets of through holes 511 formed in the first cylindrical portion 51 is not particularly limited.

Further, as shown in FIG. 12C, among the three through holes 511 belonging to the same set, one through hole 511 may be previously closed by, for example, a screw or the like. In other words, the number of through holes 511 per set is not limited to three. The number of through holes 511 per set may be one or two. The number of through holes 511 per set may be four or more.

The second cylindrical portion 52 is configured by connecting a front cylindrical portion 521 having a cylindrical shape and a rear cylindrical portion 522 having a cylindrical shape whose inner diameter is smaller than that of the front cylindrical portion 521. In the case shown in FIG. 11, the outer diameter of the front cylindrical portion 521 and the outer diameter of the rear cylindrical portion 522 are equal.

The inner diameter of the front tubular portion 521 is larger than the outer diameter of the first tubular portion 51. One end of the front cylindrical portion 521 is an end face on which a through hole for inserting the first cylindrical portion is formed, and the other end of the front cylindrical portion 521 is The rear cylindrical portion 522 is connected. In addition, the first cylindrical portion 51 is fixed to the front cylindrical portion 521 in a state in which the first cylindrical portion 51 is inserted into the inside of the front cylindrical portion 521.

The inner diameter of the rear cylindrical portion 522 is thinner than the inner diameter of the front cylindrical portion 521 as described above. For example, the inner diameter of the rear cylindrical portion 522 is smaller than the inner diameter of the first cylindrical portion 51. At one end of the rear cylindrical portion 522, as described above, the front cylindrical portion 521 is connected. Further, a through hole 523 is formed at the other end of the rear cylindrical portion 522. The size of the through hole 523 is, for example, about 0.20 mm to 0.36 mm in diameter. Thus, at the other end of the rear cylindrical portion 522, a through hole 523 having a size smaller than the size of the through hole 511 is formed. The size of the through hole 523 may be other than the illustrated one.

The bubble generation module 5 has, for example, the configuration as described above. According to the configuration as described above, the flow of the gas-containing liquid inside the gas-containing liquid processing unit 31 is, for example, as shown in FIG. Referring to FIG. 13, the gas-containing liquid supplied to the inside of the gas-containing liquid processing unit 31 through the flow path 41 flows from the first space into the inside of the bubble generation module 5. Specifically, the gas-containing liquid flows from the open end of the first cylindrical portion 51 forming the bubble generation module 5 to the inside of the bubble generation module 5. Thereafter, the gas-containing liquid flows from the first cylindrical portion 51 to the front cylindrical portion 521 of the second cylindrical portion 52 through the through hole 511. Then, the gas-containing liquid flows from the front cylindrical portion 521 to the rear cylindrical portion 522, and flows to the second space through the through hole 523. At this time, the first space and the second space are separated by the partition plate 32. Therefore, the gas-containing liquid does not flow from the first space to the second space without passing through the inside of the bubble generation module 5. In the second space, the gas-containing liquid discharged from the through hole 523 of the bubble generation module 5 is prevented from advancing by the end face 3122 or the like, and forms a turbulent flow. Thereafter, the gas-containing liquid subjected to the processing by the bubble generation module 5 is discharged from the flow path 42 connected to the vicinity of the partition plate 32 in the second space to the outside of the gas-containing liquid processing unit 31. As described above, the flow path 42 is fixed in the vicinity of the partition plate 32 so that the length from the end face 3122 of the second cylindrical portion 312 to the flow path 42 becomes long. With such a configuration, it is possible to prevent the gas-containing liquid discharged from the bubble generation module 33 from flowing directly to the flow channel 42 without forming a turbulent flow. As a result, sufficient turbulence can be formed in the second space, and a larger amount of nanobubbles can be generated more stably.

Thus, the bubble generation module 5 can be used instead of the bubble generation module 33. According to such a configuration, it is possible to stably generate very fine air bubbles generated when passing through the through holes 523. That is, by using the bubble generation module 5 described in the present embodiment, it is possible to stably generate finer bubbles.

In addition, the bubble generation module 5 may have a configuration other than the configuration described above. For example, the bubble generation module 5 may have a protrusion 3321 or the like which the bubble generation module 33 has. Moreover, when using the bubble generation module 5, the bubble generation part 3 does not need to have the constriction part 34, for example. Further, in the present embodiment, the second cylindrical portion 52 of the bubble generation module 5 has a configuration in which the front cylindrical portion 521 and the rear cylindrical portion 522 are connected. However, the second cylindrical portion 52 of the bubble generation module 5 may not have a configuration in which two configurations having different inner diameters are connected. For example, the second cylindrical portion 52 may be configured of the front cylindrical portion 521 and the rear cylindrical portion 522 (that is, one cylindrical portion) having the same inner diameter. The bubble generation module 5 can have other known configurations.

In addition, the bubble generation module 5 may be used instead of the entire gas-containing liquid processing unit 31. That is, for example, as shown in FIG. 14, the opening side end of the first cylindrical portion 51 can be connected to the flow path 41. Further, the side end portion of the bubble generation module 5 in which the through hole 523 is formed is connected to the flow passage 42 so that the gas-containing water discharged from the bubble generation module 5 flows out to the flow passage 42. You can do it. By comprising in this way, the bubble generation module 5 can be used instead of the gas-containing liquid process part 31 whole.

As mentioned above, although this invention was demonstrated with reference to said each embodiment, this invention is not limited to embodiment mentioned above. Various modifications that can be understood by those skilled in the art within the scope of the present invention can be made to the configuration and details of the present invention.

DESCRIPTION OF SYMBOLS 1 bubble generation apparatus 2 gas-liquid mixing part 21 flow path 22 flow path 23 ejector 24 flow path 25 pump 26 flow path 3 bubble generation part 31 gas containing liquid processing part 311 1st cylindrical part 3111 flange 3112 end face 312 2nd Tubular portion 3121 Flange 3122 End surface 313 Connecting member 32 Partition plate 321 Through hole 322 Fixing through hole 33 Bubble generation module 331 Spiral flow path 332 Protrusion portion 3321 Protrusion 333 Throttling portion 34 Throttling portion 35 Gas-containing liquid processing portion 351 The cylindrical portion 352 The second cylindrical portion 41 The flow passage 42 The flow passage 43 The flow passage 5 The air bubble generation module 51 The first cylindrical portion 511 The through hole 52 The second cylindrical portion 521 The front cylindrical portion 522 The rear cylindrical portion 523 through holes

Claims

A bubble generating device that generates minute bubbles in a gas-containing liquid in which a gas and a liquid are mixed,
A first cylindrical portion in which a plurality of through holes are formed, and an inner diameter thicker than the outer diameter of the first cylindrical portion, covering the first cylindrical portion, the first cylindrical portion And b) a second tubular portion into which the gas-containing liquid discharged from the through hole formed in the inflows into the inside;
The second through hole in which the gas-containing liquid flows from the inside to the outside of the second cylindrical portion is formed in the second cylindrical portion.
The bubble generating device according to claim 1, wherein
The second cylindrical portion has an inner diameter thicker than the outer diameter of the first cylindrical portion, and is thinner than the front cylindrical portion covering the first cylindrical portion and the front cylindrical portion. And a rear cylindrical portion having an inner diameter and having an end face connected to the front cylindrical portion at one end and having the second through hole formed at the other end,
The gas-containing liquid discharged from the through hole formed in the first cylindrical portion is configured to flow into the second cylindrical portion after flowing into the front cylindrical portion. .
A bubble generating apparatus according to claim 1 or 2, wherein
A plurality of the through holes are formed on the side surface of the first cylindrical portion.
A bubble generating apparatus according to any one of claims 1 to 3, wherein
A housing having an inflow passage into which the gas-containing liquid flows and a discharge passage from which the gas-containing liquid is discharged to the outside;
A partition member configured to partition the inside of the housing into a first space on the inflow path side and a second space on the discharge path side, and to be capable of fixing the bubble generation module;
A bubble generating device comprising:
A bubble generating method performed by a bubble generating device for generating minute bubbles in a gas-containing liquid in which a gas and a liquid are mixed,
After flowing into the inside of the first cylindrical portion in which a plurality of through holes are formed, the diameter is thicker than the outer diameter of the first cylindrical portion through the through holes of the first cylindrical portion. After the gas-containing liquid flows to the second cylindrical portion having the inner diameter and covering the first cylindrical portion, the second through hole formed in the second cylindrical portion is used to perform the second operation. Gas-containing liquid flows from the inside to the outside of the cylindrical part of the air bubble generation method.