JPWO2019069350A1 - Bubble generation device, bubble generation method - Google Patents

Abstract

A bubble generator that generates minute bubbles in a gas-containing liquid that is a mixture of a gas and a liquid, and has a first tubular portion in which a plurality of through holes are formed and a outside of the first tubular portion. A second tubular portion having an inner diameter larger than the diameter and covering the first tubular portion, and a gas-containing liquid discharged from the through hole formed in the first tubular portion flows into the inside. A bubble generation module having the above is provided, and a second through hole through which a gas-containing liquid flows from the inside to the outside of the second tubular portion is formed in the second tubular portion.

Description

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

Techniques for generating fine bubbles such as nano bubbles are known.

For example, Patent Document 1 describes a gas-containing liquid generating apparatus having a gas-liquid mixing unit that mixes a gas and a liquid to generate a gas-containing liquid, a gas-containing liquid processing unit, and a bubble generating unit. Specifically, the gas generating section includes a housing section, an opening / closing member, an elastic member, and a support section. Further, the gap between the opening / closing member and the support portion is configured so that the flow of the gas-containing liquid expands by moving the opening / closing member to the downstream side, and the elastic force decreases by moving the opening / closing member to the upstream side. The gas generating unit is configured to allow the gas-containing liquid to flow 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-A-2016-203109

There has been a demand for stable generation of finer bubbles depending on the application in which bubbles are used. However, with the technique described in Patent Document 1, there are cases where fine bubbles cannot always be stably generated.

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

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

The bubble generator, which is one embodiment of the present invention, in order to achieve such an object
A bubble generator that generates minute bubbles in a gas-containing liquid that is a mixture of gas and liquid.
The first tubular portion having a plurality of through holes formed therein and the first tubular portion having an inner diameter larger than the outer diameter of the first tubular portion and covering the first tubular portion, the first tubular portion A bubble generation module having a second tubular portion through which the gas-containing liquid discharged from the through hole formed in the above flows into the inside is provided.
The second tubular portion is formed with a second through hole through which the gas-containing liquid flows from the inside to the outside of the second tubular portion.

In addition, the bubble generation method, which is another embodiment of the present invention,
It is a bubble generation method performed by a bubble generator that generates minute bubbles in a gas-containing liquid that is a mixture of a gas and a liquid.
After flowing into the inside of the first tubular portion in which a plurality of through holes are formed, the diameter of the first tubular portion is larger than the outer diameter of the first tubular portion through the through holes of the first tubular portion. After the gas-containing liquid flows into the second tubular portion having an inner diameter and covering the first tubular portion, the second through hole formed in the second tubular portion is used. The gas-containing liquid flows from the inside to the outside of the tubular part of the.

The present invention can provide a bubble generating device and a bubble generating method that solve the problem that it is difficult to stably generate fine bubbles by being configured as described above.

It is a figure which shows an example of the whole structure of the bubble generator which concerns on 1st Embodiment of this invention. It is a figure which shows an example of the structure of the gas-liquid mixing part shown in FIG. It is a figure which shows an example of the structure of the bubble generation part shown in FIG. It is a figure which shows an example of the structure of the partition plate shown in FIG. It is a figure which shows an example of the structure of the bubble generation module shown in FIG. It is a figure which shows an example of the structure of the protrusion 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 the gas-containing liquid processing part in 1st Embodiment. It is a figure which shows an example of another structure of a partition plate. It is a figure which shows an example of another structure of a partition plate. It is a figure which shows an example of another structure of a gas-containing liquid processing part. It is a figure which shows an example of the structure of the bubble generation module in 2nd Embodiment. It is a figure which shows an example of the state of the through hole shown in FIG. It is a figure which shows an example of the flow of the gas-containing liquid in the gas-containing liquid processing part in the 2nd Embodiment. It is a figure which shows the other utilization example of the bubble generation module in 2nd Embodiment.

[First Embodiment]
The first embodiment of the present invention will be described with reference to FIGS. 1 to 10. FIG. 1 is a diagram showing an example of the overall configuration of the bubble generator 1. FIG. 2 is a diagram 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 diagram showing an example of the configuration of the partition plate 32. FIG. 5 is a diagram showing an example of the configuration of the bubble generation module 33. FIG. 6 is a diagram showing an arrangement example of the protrusions 3321 in the bubble generation module 33. FIG. 7 is a diagram showing an example of the flow of the gas-containing liquid in the gas-containing liquid treatment unit 31. 8 and 9 are views showing an example of another configuration of the partition plate 32. FIG. 10 is a diagram showing an example of another configuration of the gas-containing liquid treatment unit.

In the first embodiment, the bubble generator 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 generating device 1 in the present embodiment has a gas-containing liquid processing section 31 having a partition plate 32 and a bubble generating module 33, and a bubble generating section 3 having a drawing section 34. As will be described later, in the partition plate 32 in the present embodiment, the space inside the gas-containing liquid treatment unit 31 is the space on the flow path 41 side that functions as an inflow path for the gas-containing liquid to the gas-containing liquid treatment unit 31. It is divided into two spaces: a first space) and a space on the flow path 42 side (second space) that functions as a discharge path for the gas-containing liquid from the gas-containing liquid treatment unit 31. Further, the partition plate 32 is formed with a through hole 321 for mounting the bubble generation module 33, and by mounting the bubble generation module 33 in the through hole 321, the bubble generation module 33 is fixed to the partition plate 32. Can be done. With such a configuration, the gas-containing liquid that has entered the inside of the gas-containing liquid treatment unit 31 through the flow path 41 that functions as an inflow path flows inside the bubble generation module 33 and then functions as a discharge path. It moves to the space on the side of the road 42 and flows out from the flow path 42 to the outside of the gas-containing liquid treatment unit 31.

First, with reference to FIG. 1, an outline of the overall configuration of the bubble generation device 1 will be described. FIG. 1 shows an example of the overall configuration of the bubble generator 1. Referring to FIG. 1, the bubble generating device 1 has a gas-liquid mixing section 2 and a bubble generating section 3.

As shown in FIG. 1, a fluid such as water is supplied to the gas-liquid mixing unit 2 through the fluid inlet. Further, a gas such as air is supplied to the gas-liquid mixing unit 2 through the 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 generating 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 via the flow path.

The bubble generation unit 3 generates nanobubbles in the supplied gas-containing liquid by performing a predetermined process. Nanobubbles are fine bubbles having a particle size of 1 micrometer or less in nanometer (nm) units, and have a particle size of, for example, about 50 to 500 nm. The nanobubble water, which is a gas-containing liquid containing nanobubbles 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 an outline of the overall configuration of the bubble generator 1.

The above description is merely an example. The bubble generation device 1 may have a configuration other than those illustrated above. For example, in the bubble generation device 1, the gas-containing liquid and nanobubble water circulate in the bubble generation device 1 by connecting the discharge port and the fluid inflow port shown in FIG. 1 via a clearing tank or the like (not shown). It may be configured. Further, for example, the bubble generator 1 may be configured so that a fluid such as water is supplied from the outside through the fluid inlet and the nanobubble water is discharged to the outside through the discharge port. Absent. In addition, the bubble generator 1 can have various known configurations such as various sensors such as a pressure gauge and a valve for preventing backflow in the flow path.

Subsequently, the details of each configuration constituting the bubble generation device 1 will be described. 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 has an ejector 23 and a pump 25. Further, the gas-liquid mixing section 2 is formed with a flow path 21, a flow path 22, a flow path 24, and a flow path 26.

A fluid inlet is formed at one end of the flow path 21, and an ejector 23 is connected to the other end. Further, in the flow path 24, the ejector 23 is connected to one end and the pump 25 is connected to the other end. Further, 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. In this way, in the gas-liquid mixing section 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 a fluid such as water through 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 into the flow path 26.

Further, a flow path 22 is connected to the ejector 23. The flow path 22 forms a gas flow path 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 throttle portion or the like where the inner diameter is smaller than the inner diameter of the flow path 21 or the flow path 24. By utilizing the Venturi effect, the ejector 23 supplies a gas such as air supplied through the flow path 22 to the flow path through which the above-mentioned fluid flows. In this way, by supplying the gas to the flow path through which the fluid flows by using the ejector 23, the gas-liquid mixing unit 2 mixes the gas and the fluid to generate a gas-containing liquid.

As described above, the gas-liquid mixing unit 2 has a configuration for mixing a liquid and a gas to generate a 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 employ various known modifications.

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 treatment unit 31 and a drawing unit 34. As will be described later, after the gas-containing liquid treatment unit 31 performs a predetermined treatment, the bubble generation unit 3 passes through the throttle unit 34, for example, which forms a diaphragm that narrows the width of the flow path (the inner diameter becomes narrower). As a result, nanobubbles are generated in the gas-containing liquid. In this way, in the bubble generation unit 3, nanobubbles are generated in the gas-containing liquid in the gas-containing liquid treatment unit 31 and the drawing unit 34. Further, a flow path 41, a flow path 42, and a flow path 43 are formed in the bubble generation unit 3.

One end of the flow path 41 is connected to the gas-liquid mixing unit 2, and the other end of the flow path 41 is connected to the gas-containing liquid treatment unit 31. That is, the gas-containing liquid discharged through the flow path 26 is supplied to the gas-containing liquid processing unit 31 via the flow path 41. Further, a flow path 42 is connected to the gas-containing liquid treatment section 31, and the other end of the flow path 42 is connected to the drawing section 34. Further, a flow path 43 is connected to the throttle portion 34, and a discharge port is formed at the other end of the flow path 43.

Due to such a configuration, the gas-containing liquid produced by the gas-liquid mixing unit 2 is supplied to the gas-containing liquid processing unit 31 via the flow path 41. Further, the gas-containing liquid discharged from the gas-containing liquid treatment unit 31 is supplied to the throttle portion 34 via the flow path 42, and the gas-containing liquid that has passed through the throttle portion 34 is discharged to the outside through the flow path 43. Will be done. That is, the flow path 41 has a function as an inflow path for the gas-containing liquid to flow into the gas-containing liquid treatment unit 31, and the flow path 42 serves as an discharge path for discharging the gas from the gas-containing liquid treatment unit 31. It has the function of. Further, the flow path 42 has a function as an inflow path for flowing the gas-containing liquid into the throttle portion 34, and the flow path 43 has a function as an discharge path for discharging the gas from the throttle portion 34. There is.

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

For example, the gas-containing liquid treatment unit 31 has a first cylindrical portion 311 (first housing) having a cylindrical shape, in which a flange 3111 is formed at one end and an end surface 3112 is formed at the other end. It has a second cylindrical portion 312 (second housing) having a cylindrical shape, in which a flange 3121 is formed at one end and an end surface 3122 is formed at the other end. Further, the end portion of the flow path 41 is connected at a predetermined position on the side surface of the first tubular portion 311, and the end portion of the flow path 42 is connected at a predetermined location on the side surface of the second tubular portion 312. The gas-containing liquid treatment unit 31 sandwiches an outer peripheral side portion of the partition plate 32, which will be described later, between the flange 3111 formed in the first tubular portion 311 and the flange 3121 formed in the second tubular portion 312. In this state, it is formed by connecting the first tubular portion 311 and the second tubular portion 312 with the connecting member 313. The connecting member 313 is, for example, a nut or a bolt. The connecting member 313 is inserted into a through hole formed in the flange 3111 or the flange 3121 or a fixing through hole 322 formed in the partition plate 32, whereby the first tubular portion 311 and the second tubular portion are inserted. Connect with 312.

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

The partition plate 32 is a plate-shaped member having a substantially circular shape when viewed from the front. The partition plate 32 is fixed to the gas-containing liquid treatment unit 31 to partition the internal space of the housing constituting the gas-containing liquid treatment unit 31 into two spaces. Specifically, in the partition plate 32, the space inside the housing constituting the gas-containing liquid treatment unit 31 is the first space on the flow path 41 side that functions as an inflow path for the gas-containing liquid, and the gas-containing liquid is discharged. It is partitioned into a second space on the flow path 42 side that functions as a road. In other words, in the partition plate 32, the space inside the gas-containing liquid treatment unit 31 is a space on the first tubular portion 311 side and a space on the second tubular portion 312 side. Divide into 2 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 of the second space is wider than that of the first space.

FIG. 4 shows an example of the configuration of the partition plate 32. 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, the partition plate 32 is formed with three through holes 321 and eight fixing through holes 322.

The through hole 321 is a through hole used when the bubble generation module 33 is mounted on the partition plate 32. That is, the bubble generation module 33 is mounted in the through hole 321. The method of mounting the bubble generation module 33 in the through hole 321 is not particularly limited, but for example, a screw type, welding, or the like may be adopted. Alternatively, for example, the bubble generation module 33 having the male threaded portion formed on the outer peripheral surface is screwed into the female threaded portion formed on the inner peripheral surface of the through hole 321 to insert the bubble generating module 33 to a predetermined position, and then welding is performed. A method that combines screws 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, through holes 321 are formed in the vicinity of the center of the partition plate 32, for example, at equal intervals.

The fixing through hole 322 is a through hole used when fixing the partition plate 32 to the gas-containing liquid treatment unit 31. A connecting member 313 is inserted through the fixing through hole 322. The fixing through hole 322 is formed on the outer peripheral side of the partition plate 32 at a position corresponding to the formation position of the through hole formed in the flange 3111 or the flange 3121. The size of the fixing through hole 322 is a size corresponding 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 above-described configuration. In this way, the partition plate 32 is configured so that the inside of the housing constituting the gas-containing liquid treatment unit 31 is divided into a first space and a second space, and the bubble generation module 33 can be fixed. .. By having the above-described configuration, the partition plate 32 is fixed to the gas-containing liquid treatment unit 31 using the fixing through hole 322. Further, the bubble generation module 33 is mounted in 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 bubble generation module 33, the inflow port to the bubble generation module 33 is located on the flow path 41 side (in the first space), and the discharge port from the bubble generation module 33 is on the flow path 42 side (second space). It is fixed to the partition plate 32 in a state of being located inside). Due to such a state, the gas-containing liquid supplied from 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 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, the gas-containing liquid supplied into the first space of the gas-containing liquid treatment unit 31 via the flow path 41 passes through the inside of the bubble generation module 33, and then the gas-containing liquid treatment unit 31 Reach within our second space. As described above, 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. 5A shows an example of the configuration of the bubble generation module 33, and FIGS. 5B and 5C show another example of the configuration of the bubble generation module 33. ing. The partition plate 32 may be equipped with the bubble generation module 33 shown in FIG. 5 (A), the bubble generation module 33 shown in FIG. 5 (B), and the bubble generation module 33 shown in FIG. 5 (C). May be installed. Any one of the bubble generation modules 33 shown in FIGS. 5 (A), 5 (B), and 5 (C), or a combination thereof may be mounted on the partition plate 32.

With reference to FIG. 5A, the bubble generation module 33 is composed of, for example, a spiral flow path 331 and a protrusion 332.

The spiral flow path 331 is a flow path 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 path 331 to form a spiral flow. The spiral flow path 331 may have a configuration other than the spiral flow path, such as a rotating blade portion, as long as a spiral flow can be formed.

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

FIG. 6 shows an example of the positional relationship of the protrusion 3321 screwed in the protrusion 332. Specifically, FIG. 6A shows an example of the positional relationship of the protrusions 3321, and FIG. 6B shows another example of the positional relationship of the protrusions 3321. Referring to FIG. 6 (A), in the protrusion 332, the protrusion 3321 is formed at each position of, for example, 0 degrees, 120 degrees, and 240 degrees, with the upper side of FIG. 6 (A) as 0 degrees. Further, referring to FIG. 6B, for example, protrusions 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 the 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 protrusion 332, for example, protrusions 3321 are formed at each position so that the positional relationship of the protrusions 3321 is different in the adjacent set. Specifically, for example, a set in which the protrusions 3321 are screwed in in the positional relationship shown in FIG. 6 (A) and a set in which the protrusions 3321 are screwed in in the positional relationship shown in FIG. 6 (B) appear to each other. The protrusion 332 is configured.

If the positional relationship of the protrusions 3321 is different in the adjacent sets, the protrusions 3321 may be formed in a positional relationship other than the positional relationship shown in FIGS. 6 (A) and 6 (B). Further, the number of protrusions 3321 in one set is not limited to three. For example, the number of protrusions 3321 in one set may be one or two, or may be four or more.

As described above, the bubble generation module 33 is composed of, for example, a spiral flow path 331 and a protrusion 332 composed of six sets. The bubble generation module 33 may employ various known modifications. For example, in the protrusion 332, one or a plurality of V-shaped grooves may be formed by placing the protrusion 332 in a place other than the place where the protrusion 3321 is provided.

Further, the bubble generation module 33 may have a configuration as shown in FIG. 5 (B). With reference to FIG. 5B, the bubble generation module 33 is composed of, for example, a spiral flow path 331, a protrusion 332, and a throttle portion 333. In the case of the bubble generation module 33 shown in FIG. 5 (B), a part of the protrusion 332 is replaced with the throttle portion 333 as compared with the case shown in FIG. 5 (A). In other words, in the case shown in FIG. 5B, the bubble generation module 33 is composed of, for example, a spiral flow path 331, a protrusion 332 composed of three sets, and a throttle portion 333.

The narrowing portion 333 is a portion of the bubble generation module 33 having an inner diameter smaller than that of the protruding portion 332. As shown in FIG. 5, the narrowing portion 333 is formed so that the inner diameter gradually decreases toward the downstream side and then gradually increases as the inner diameter advances from the first portion to the downstream side. The specific configuration of the throttle portion 333 is not particularly limited to the case shown in FIG. 5 (B). The drawing portion 333 may have a shape other than that illustrated in FIG. 5 (B) as long as the flow path through which the gas-containing liquid flows is narrow, such as when the inner diameter of the drawing portion 333 is narrowed.

Further, the bubble generation module 33 may have a configuration as shown in FIG. 5C. With reference to FIG. 5C, the bubble generation module 33 is composed of, for example, a spiral flow path 331 and a protrusion 332. In the case shown in FIG. 5 (C), the number of pairs constituting the protrusion 332 is smaller than that in the case shown in FIG. 5 (A). That is, in the case shown in FIG. 5C, the bubble generation module 33 is composed of, for example, a spiral flow path 331 and a protrusion 332 composed of three sets.

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

According to the configuration as described above, the flow of the gas-containing liquid inside the gas-containing liquid treatment unit 31 is shown in FIG. 7, for example. 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 into the inside of the bubble generation module 33. Specifically, the gas-containing liquid flows into the spiral flow path 331 that forms the bubble generation module 33. As a result, a spiral flow is formed. Further, the gas-containing liquid forming the spiral flow passes through the inside of the bubble generation module 33 while colliding with the protrusions 3321 formed on the protrusions 332, and then flows into the second space. At this time, the first space and the second space are separated by a 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. Further, in the second space, the gas-containing liquid discharged from the end portion of the bubble generation module 33 is hindered by the end face 3122 or the like, and forms a turbulent flow inside the second space. After that, the gas-containing liquid processed 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 treatment 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 surface 3122 of the second tubular 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 directly flowing into the flow path 42 without forming a turbulent flow. As a result, it becomes possible to sufficiently form a turbulent flow in the second space, and it becomes possible to generate a larger amount of nanobubbles more stably.

The throttle portion 34 is configured so that the gas-containing liquid passes through a portion narrower than the flow path 42 or the flow path 43, such as having an inner diameter smaller than the inner diameter of the flow path 42 or the flow path 43. That is, the throttle portion 34 is configured to limit the flow of the gas-containing liquid. In the present embodiment, the specific configuration of the throttle portion 34 is not particularly limited. The throttle 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, and the gap formed between the housing and the sphere is adjusted so that the gas-containing liquid flows. It may have the above-mentioned configuration. In the case of the above configuration, the size of the gap between the housing and the sphere is adjusted by the speed of the flow of the gas-containing liquid and the force that pushes the sphere back by the spring. Further, the drawing portion 34 may have a structure having a drawing formed so that the inner diameter becomes smaller toward the downstream side. The throttle portion 34 may be configured to be adjustable so that the gas-containing liquid flows through one or a plurality of throttle portions according to, for example, the flow rate of the gas-containing liquid. The throttle portion 34 may have other known configurations.

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

As described above, the bubble generating device 1 in the present embodiment has the bubble generating section 3 having the gas-containing liquid processing section 31 having the partition plate 32 and the bubble generating module 33, and the drawing section 34. With such a configuration, the gas-containing liquid that has entered the inside of the gas-containing liquid treatment unit 31 through the flow path 41 that functions as an inflow path passes through the inside of the 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 road 42, and flows out from the flow path 42 to the outside of the gas-containing liquid treatment unit 31. Further, the gas-containing liquid flowing out of the gas-containing liquid treatment unit 31 passes through the drawing unit 34. In this way, the gas-containing liquid passes through the bubble generation module 33, the second space, and the throttle portion 34, causing collisions and pressure fluctuations of the gas-containing liquid, and a large amount of nanobubbles are generated in the gas-containing liquid. Will be done.

Further, according to the present embodiment, the number of 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, the amount of nanobubble water produced can be easily adjusted.

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 treatment unit 31, only one bubble generation module 33 is inside the gas-containing liquid treatment unit 31. Can be formed into. On the other hand, for example, by fixing the partition plate 32 provided with the five through holes 321 as shown in FIG. 9 to the gas-containing liquid treatment unit 31, the five bubble generation modules 33 are placed inside the gas-containing liquid treatment unit 31. Can be formed into. In this way, by changing the partition plate 32 fixed to the gas-containing liquid treatment unit 31, the amount of nanobubble water generated can be easily adjusted. As described above, the number of through holes 321 formed in the partition plate 32 may be any one or more.

The diameter of the gas-containing liquid treatment unit itself may be changed according to the number of bubble generation modules 33 formed inside the gas-containing liquid treatment unit 31. For example, FIG. 10 shows an example of a gas-containing liquid treatment unit 35 that the bubble generation unit 3 can have instead of the gas-containing liquid treatment unit 31.

Referring to FIG. 10, the gas-containing liquid treatment unit 35 has 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, detailed description thereof will be omitted. In the case of the gas-containing liquid treatment unit 35, the partition plate 32 is fixed so as to be sandwiched by the gas-containing liquid treatment unit 35. Therefore, the partition plate 32 is not provided with the fixing through hole 322. As described above, the partition plate 32 does not necessarily have to be formed with the fixing through hole 322.

Further, in the case of FIG. 10, the flow path 41 is connected not to the side surface of the first tubular portion 351 but to the end surface having a hemispherical shape. As described above, when the number of bubble generation modules 33 is one or two, the flow path 41 may be connected to the end surface of the first tubular portion 351. On the other hand, the flow path 42 is formed on the side surface of the second tubular portion 352. In other words, even when the flow path 41 is connected to the end face, it is desirable that the flow path 42 is connected to the side surface in the vicinity of the partition plate 32 instead of the hemispherical end face of the second tubular portion 352. With this configuration, it is possible to discharge the gas-containing liquid to the outside of the gas-containing liquid processing unit 35 after causing turbulence inside the second tubular portion 352 after the bubble generation module 33. .. 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 diagram showing an example of the appearance of the through hole 511. FIG. 13 is a diagram showing an example of the flow of the gas-containing liquid in the gas-containing liquid treatment unit 31 in the second embodiment. FIG. 14 is a diagram showing another utilization 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 bubble generation module 5 described in this embodiment can be mounted on the partition plate 32 instead of the bubble generation module 33. When a plurality of modules can be mounted on the partition plate 32, the bubble generation module 33 and the bubble generation module 5 may be mounted on 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 bubble generation module 5 has a first tubular portion 51 and an inner diameter larger than the outer diameter of the first tubular portion 51, and has a first tubular portion 51 in the internal space. The first tubular portion 51 is fixed (that is, covers the first tubular portion 51) with the second tubular portion 52 inserted. The outer diameter of the entire bubble generation module 5 (for example, the outer diameter of the second tubular portion 52) is equal to, for example, the outer diameter of the entire bubble generation module 33. Therefore, the bubble generation module 5 can be mounted in the through hole 321 formed in the partition plate 32 instead of the 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 tubular 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 those illustrated.

FIG. 12 shows an example of the positional relationship of the through holes 511 formed on the side surface of the first tubular portion 51. Specifically, FIG. 12A shows an example of the positional relationship of the through hole 511, and FIG. 12B shows another example of the positional relationship of the through hole 511. Further, FIG. 12C shows another configuration example of the through hole 511. Referring to FIG. 12 (A), in the first tubular portion 51, through holes 511 are formed at each location of, for example, 0 degrees, 120 degrees, and 240 degrees, with the upper side of FIG. 12 (A) as 0 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. As described above, the through holes 511 are formed in the first tubular portion 51 in a plurality of sets, for example, with the three through holes 511 as one set.

In the first tubular portion 51, for example, through holes 511 are formed at each location so that the positional relationship of the through holes 511 is different in adjacent sets. Specifically, for example, a set in which the through hole 511 is formed in the positional relationship shown in FIG. 12 (A) and a set in which the through hole 511 is formed in the positional relationship shown in FIG. 12 (B) appear mutually. As described above, the first tubular portion 51 is configured. In the present embodiment, the number of sets of through holes 511 formed in the first tubular portion 51 is not particularly limited.

Further, as shown in FIG. 12C, one of the three through holes 511 belonging to the same set may be previously closed with, for example, a screw. 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 tubular portion 52 has a configuration in which a front tubular portion 521 having a cylindrical shape and a rear tubular portion 522 having a cylindrical shape having an inner diameter smaller than that of the front tubular portion 521 are connected. In the case shown in FIG. 11, the outer diameter of the front tubular portion 521 and the outer diameter of the rear tubular portion 522 are equal to each other.

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 tubular portion 521 is an end face formed with a through hole for inserting the first tubular portion, and the other end of the front tubular portion 521 has a through hole. , The rear tubular portion 522 is connected. Further, the first tubular portion 51 is fixed to the front tubular portion 521 in a state where the first tubular portion 51 is inserted inside the front tubular portion 521.

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

The bubble generation module 5 has, for example, the above-described configuration. According to the configuration as described above, the flow of the gas-containing liquid inside the gas-containing liquid treatment unit 31 is shown in FIG. 13, for example. Referring to FIG. 13, the gas-containing liquid supplied to the inside of the gas-containing liquid treatment unit 31 via 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 opening-side end of the first tubular portion 51 forming the bubble generation module 5 into the bubble generation module 5. After that, the gas-containing liquid flows from the first tubular portion 51 to the front tubular portion 521 of the second tubular portion 52 through the through hole 511. Then, the gas-containing liquid flows from the front tubular portion 521 to the rear tubular 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 a 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. Further, in the second space, the gas-containing liquid discharged from the through hole 523 of the bubble generation module 5 is hindered by the end face 3122 or the like, and forms a turbulent flow. After that, the gas-containing liquid processed 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 treatment 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 surface 3122 of the second tubular 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 directly flowing into the flow path 42 without forming a turbulent flow. As a result, it becomes possible to sufficiently form a turbulent flow in the second space, and it becomes possible to generate a larger amount of nanobubbles more stably.

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

The bubble generation module 5 may have a configuration other than the above-described configuration. For example, the bubble generation module 5 may have a protrusion 3321 or the like included in the bubble generation module 33. Further, when the bubble generation module 5 is used, for example, the bubble generation unit 3 may not have the drawing unit 34. Further, in the present embodiment, the second tubular portion 52 of the bubble generation module 5 has a configuration in which the front tubular portion 521 and the rear tubular portion 522 are connected to each other. However, the second tubular portion 52 of the bubble generation module 5 does not have to have a configuration in which two configurations having different inner diameters are connected. For example, the second tubular portion 52 may be composed of a front tubular portion 521 and a rear tubular portion 522 (that is, one tubular portion) having the same inner diameter. The bubble generation module 5 can have other known configurations.

Further, the bubble generation module 5 may be used instead of the entire gas-containing liquid treatment unit 31. That is, for example, as shown in FIG. 14, the opening side end portion of the first tubular portion 51 and the flow path 41 can be connected. Further, the side end portion of the bubble generation module 5 in which the through hole 523 is formed is connected to the flow path 42 so that the gas-containing water discharged from the bubble generation module 5 flows out to the flow path 42. Can be done. With this configuration, the bubble generation module 5 can be used in place of the entire gas-containing liquid treatment unit 31.

Although the present invention has been described above with reference to each of the above embodiments, the present invention is not limited to the above-described embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present invention within the scope of the present invention.

1 Bubble generation device 2 Gas-liquid mixing section 21 Flow path 22 Flow path 23 Ejector 24 Flow path 25 Pump 26 Flow path 3 Bubble generation section 31 Gas-containing liquid treatment section 311 First tubular section 3111 Flange 3112 End face 312 Second Cylindrical part 3121 Flange 3122 End face 313 Connecting member 32 Partition plate 321 Through hole 322 Fixing through hole 33 Bubble generation module 331 Spiral flow path 332 Protrusion 3321 Protrusion 333 Squeeze 34 Squeeze 35 Gas-containing liquid treatment part 351 First Cylindrical part 352 Second tubular part 41 Flow path 42 Flow path 43 Flow path 5 Bubble generation module 51 First tubular part 511 Through hole 52 Second tubular part 521 Front tubular part 522 Rear tubular part 523 through hole

Claims (5)

A bubble generator that generates minute bubbles in a gas-containing liquid that is a mixture of gas and liquid.
The first tubular portion having a plurality of through holes formed therein and the first tubular portion having an inner diameter larger than the outer diameter of the first tubular portion and covering the first tubular portion, the first tubular portion A bubble generation module having a second tubular portion through which the gas-containing liquid discharged from the through hole formed in the above flows into the inside is provided.
A bubble generating device in which a second through hole through which a gas-containing liquid flows from the inside to the outside of the second tubular portion is formed in the second tubular portion. The bubble generating device according to claim 1.
The second tubular portion has an inner diameter larger than the outer diameter of the first tubular portion, and is thinner than the front tubular portion covering the first tubular portion and the front tubular portion. It is composed of a rear tubular portion having an inner diameter and having an end surface connected to the front tubular 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 tubular portion flows into the front tubular portion and then flows into the rear tubular portion. .. The bubble generator according to claim 1 or 2.
A bubble generator in which a plurality of the through holes are formed on a side surface of the first tubular portion. The bubble generator according to any one of claims 1 to 3.
A housing having an inflow path for the gas-containing liquid to flow in and an discharge path for discharging the gas-containing liquid 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 fix the bubble generation module.
A bubble generator equipped with. It is a bubble generation method performed by a bubble generator that generates minute bubbles in a gas-containing liquid that is a mixture of a gas and a liquid.
After flowing into the inside of the first tubular portion in which a plurality of through holes are formed, the diameter of the first tubular portion is larger than the outer diameter of the first tubular portion through the through holes of the first tubular portion. After the gas-containing liquid flows into the second tubular portion having an inner diameter and covering the first tubular portion, the second through hole formed in the second tubular portion is used. A method of generating bubbles in which a gas-containing liquid flows from the inside to the outside of the tubular part of the.

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