JP5740684B2 - Bubble generator - Google Patents

Description

  The present invention relates to a bubble generator used for cleaning parts and the like, supplying oxygen to a sacrifice or a water tank, supplying a culture solution and air to a hydroponic culture medium, and the like.

As such a bubble generator, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-207099), (a) a channel expansion method using a venturi tube or the like, (b) a pressurized dissolved gas Supersaturated precipitation method (pressure dissolution method), (c) swirling bubble shearing method (swirling flow method), (d) high-pressure opening method using orifices, etc. (e) gas discharge method from fine holes, (f) Bubble destruction methods using ultrasonic waves or machines are known (see paragraph 0006).
Patent Document 1 discloses a flow passage 101 to which a gas-liquid mixed phase flow is supplied, a pressure receiving portion 12 that receives a gas-liquid mixed phase flow at one end of the flow passage, and a side surface of the flow passage 101 in the vicinity of the pressure receiving portion 12. A discharge path 13 for introducing a gas-liquid mixed phase flow to generate microbubbles, and the discharge path 13 is connected to the side surface of the flow path 101 and has a tapered shape with a large diameter on the outlet side. 1 is disclosed (see FIG. 1 and paragraphs 0030 to 0034).

However, in the microbubble generator 1 disclosed in Patent Document 1, it is not clear how the flow passage 101, the pressure receiving portion 12, and the discharge passage 13 are processed, and the material is not clear.
For this reason, for example, when the flow passage 101, the pressure receiving portion 12, and the discharge passage 13 are cut, there is a problem in that the manufacturing thereof takes time and effort and costs increase.
In addition, the flow passage 101 of the microbubble generator 1 communicates with the flow passage 111 of the pipe portion 11, and a gas-liquid mixed phase flow is supplied from the pipe portion 11. 11 is formed by another mechanism (the intake device 34 and the intake pipe 35) on the upstream side.
Therefore, in order to generate microbubbles, it is necessary not only to connect the piping part 11 of the microbubble generator 1 and the pump 33 by the pipe 32 but also to install another mechanism for forming a gas-liquid mixed phase flow. There is a problem that construction is troublesome.
Further, as described in paragraph 0032, the pressure receiving portion 12 has a maximum inner diameter that is the same as that of the flow passage 111, and the central axis of the flow passage 111 is directed toward the center of the pressure receiving portion 12 as viewed from FIG. It has become a thing.
Therefore, the water flow in the pressure receiving portion 12 becomes a substantially uniform flow toward the periphery, and bubbles having a relatively uniform diameter are formed.

JP 2008-207099 A

The main problem to be solved by the present invention is to solve the problems in the conventional bubble generating apparatus, that is, to make it possible to produce a highly durable bubble generating apparatus at low cost and to perform construction easily.
Another problem to be solved by the present invention is to be able to form not only uniform-sized bubbles but also various-sized bubbles, and further to control the diameters of these bubbles. It is.

The invention according to claim 1 for solving the above-mentioned problem is a liquid passage for flowing a liquid supplied from a pump or water supply from one end side to the other end side, and merges in the middle of the liquid passage, and enters the liquid passage. Gas passage for introducing gas, spherical, elliptical, cylindrical, elliptical columnar or prismatic cavity communicating with the other end of the liquid passage, and discharge for communicating the cavity and discharging the liquid and the gas to the outside a bubble generator made of integrally molded structure with a passage, the central axis of the liquid passage, only the area of the lower side from the center of the cavity, or to pass only the upper side region from the center of the cavity A bubble generating device comprising a bolt capable of appearing and retracting in the cavity .

According to a second aspect of the present invention for solving the above-described problem , a liquid passage for flowing a liquid supplied from a pump or water supply from one end side to the other end side, merges in the middle of the liquid passage, Gas passage for introducing gas, spherical, elliptical, cylindrical, elliptical columnar or prismatic cavity communicating with the other end of the liquid passage, and discharge for communicating the cavity and discharging the liquid and the gas to the outside A bubble generating device comprising an integrally molded structure having a passage, wherein a central axis of the liquid passage passes only through a region below the center of the cavity or only a region above the center of the cavity. The discharge passage includes a main discharge passage extending in the left-right direction from the cavity and a sub-discharge passage extending downward, upward, or rearward from the cavity, and the sub-discharge passage is formed narrower than the main discharge passage. It is characterized by .

The invention according to claim 3 for solving the above-mentioned problem is characterized in that, in the bubble generating device according to claim 1 or 2 , the integrally molded structure is made of resin.

Since the bubble generating device according to the first and second aspects of the present invention is composed of an integrally molded structure having a liquid passage, a gas passage, a cavity, and a discharge passage, the processing does not take time and effort, and the cost is low. There is an effect that it can be manufactured.
Also, by connecting one end of the liquid passage to a pump or tap with a pipe such as a hose, and supplying liquid such as water, a gas such as air is sucked from the gas passage, and a large number of air is discharged from the discharge passage to the outside. Since liquid mixed with bubbles is discharged, there is an effect that anyone can easily install.
Another advantage is that even under poor conditions of use, such as sandy water and seawater, the structure is simple and there are almost no clogged parts such as sand. Even when a problem such as a malfunction does not occur, since the bubble is generated only in the integrally molded structure, it can be dealt with by checking or replacing only the integrally molded structure.
And, accompanying these effects, the growth speed of fish can be improved by using this bubble generating device for fish farming, or the growth speed of plants can be improved by using it for hydroponics. The effect of being able to be obtained.

In addition to the above effects, the bubble generating apparatus according to the first and second aspects of the invention has the following effects.
That is, in the bubble generating device according to the first and second aspects of the present invention, since the central axis of the liquid passage passes through only the region below or above the center of the cavity, The liquid and the gas that flowed into the surface collide with the lower wall surface or the upper wall surface that is off the center on the back side of the cavity, and form a vortex at a position where the cavity is biased.
As a result, the flow of liquid and gas in the cavity becomes non-uniform, and the flow of liquid and gas exiting from the discharge path becomes non-uniform, so that the diameters of the formed bubbles are non-uniform.
When liquids with mixed bubbles of non-uniform diameter are used for cleaning parts, etc., bubbles of various diameters collide with parts, etc., and large diameter bubbles cause rough cleaning, while small diameter bubbles cause finer cleaning. Since the final cleaning is performed, there is an effect that the cleaning power is improved as compared with the case where a liquid in which bubbles having a uniform diameter are mixed is used for cleaning parts and the like.
In addition, when liquids with mixed bubbles of non-uniform diameter are used for hydroponics, bubbles of various diameters collide with the roots of the plant and the liquid easily penetrates into various parts of the roots. There is an effect that the growth of the plant is improved as compared with the case where the liquid mixed with bubbles is used for hydroponics.

Moreover, since the bubble generator of the invention which concerns on Claim 1 is equipped with the volt | bolt which can be projected and retracted in a cavity, the length of the bubble which generate | occur | produces by adjusting the length of the volt | bolt which protrudes and indents and protrudes in the inside of a cavity There is an effect that the diameter can be adjusted.

In the bubble generating device of the invention according to claim 2 , the discharge passage includes a main discharge passage extending in the left-right direction from the cavity and a sub-discharge passage extending downward, upward or rearward from the cavity. Since the main discharge passage is narrower than the main discharge passage, the amount and diameter of the generated bubbles are different between the main discharge passage and the sub discharge passage, and various bubbles can be generated.
Further, by closing the sub-discharge passage, there is an effect that the amount, the diameter, and the way out of the bubbles discharged from the main discharge passage can be changed.

Bubble generator of the invention according to claim 3, in addition to the effect of the bubble generator of the invention according to claim 1 or 2, since it is made of integrally molded structures resins, simple and inexpensive to manufacture, is the material itself It is inexpensive, lightweight, resistant to corrosion by seawater or liquid containing chemicals, and can be freely colored, so that it is easy to distinguish when providing a plurality of types of bubble generators, and can be colored.

The perspective view which shows the external appearance of the Example of the bubble generator which concerns on this invention. The top view of the Example of the bubble generator which concerns on this invention. The front view of the Example of the bubble generator which concerns on this invention. The side view of the Example of the bubble generator which concerns on this invention. Sectional drawing in the AA of FIG. Sectional drawing in the BB line of FIG.

  Hereinafter, embodiments of the present invention will be described by way of examples.

FIG. 1 is a perspective view showing the appearance of an embodiment of a bubble generator according to the present invention, in which one corner of a rectangular parallelepiped having a length of about 60 mm, a width of about 85 mm, and a thickness of about 30 mm is cut out parallel to one side in the thickness direction. Further, it is made of a resin-made integrally molded structure 1 having a pentagonal prism shape.
In the substantially central portion of the integrally molded structure 1, as shown in the perspective view of FIG. 1 (dotted line portion) and the cross-sectional views of FIGS. 5 and 6, a short cylindrical cavity having a diameter of about 10 mm and a length of about 4.5 mm. 2, the flat surfaces corresponding to the upper surface and the bottom surface of the cylinder are arranged in parallel to the side wall surface of the integrally molded structure 1, and the curved surface corresponding to the circumferential surface faces the front and rear and upper and lower wall surfaces of the integrally molded structure 1.
In addition, as shown in FIGS. 1 to 4 (dotted line portion) and FIGS. 5 and 6, the integrally molded structure 1 reaches the lower part of the front wall surface of the cavity 2 from the front wall surface and communicates with the cavity 2. A liquid passage 3 having a diameter of about 6 mm, a gas passage 4 having a diameter of about 2.5 mm that reaches the middle of the liquid passage from the surface of one corner of the rectangular parallelepiped, and communicates with the liquid passage 3. A main discharge passage 5 having a small diameter of about 10 mm and a large diameter of about 14 mm, a sub discharge passage 6 having a diameter of about 4.5 mm extending downwardly from the cavity 2, and a diameter of about 4 mm extending linearly upward from the cavity 2. Bolt insertion holes 7 are formed.
Hereinafter, each passage and the bolt insertion hole 7 will be described in detail.

On one end side (front wall side) of the liquid passage 3, a liquid pipe recess 8 for inserting a pipe is formed so that a pipe for supplying a liquid such as water, seawater, or a culture solution can be fixed. It is. The pipe is connected to a pump or a water supply for supplying liquid such as water, seawater, and culture solution through a valve so that the supply amount of the liquid introduced into the liquid passage 3 can be controlled. .
The central axis of the liquid passage 3 is parallel to the bottom and top surfaces of the integrally molded structure 1 and passes only through the region below the center of the cavity 2. Therefore, the liquid and gas flowing into the cavity 2 from the liquid passage 3 collide with the lower wall surface deviated from the center on the back side of the cavity 2 to form a vortex at the position where the cavity 2 is biased. The flow of liquid and gas inside becomes non-uniform. As a result, the flow of the liquid and gas exiting to the main discharge passage 5 and the sub discharge passage 6 is also non-uniform, so that the diameters of the formed bubbles are non-uniform.

  A recess for a gas pipe for inserting a pipe so that a pipe for supplying a gas such as air or oxygen can be fixed to the surface of a rectangular parallelepiped where the gas passage 4 is opened. 9 is formed. The piping is connected to a cylinder filled with air, oxygen, or the like via a valve, so that the amount of gas introduced into the liquid passage 3 can be controlled.

  The main discharge passage 5 extends in a trumpet shape from the whole or a part of the flat surface corresponding to the upper surface and the bottom surface of the cylindrical cavity 2 toward the left and right side wall surfaces, and the generated bubbles are mainly open portions of the main discharge passage 5. Discharged from.

The sub discharge passage 6 extends linearly downward from the lower wall surface of the peripheral surface of the cavity 2 toward the bottom surface, and is formed narrower than the main discharge passage 5.
Therefore, the liquid in which bubbles having different amounts and diameters from the main discharge passage 5 are mixed is discharged from the sub discharge passage 6. Moreover, by closing this passage, not only can the amount and diameter of the bubbles discharged from the main discharge passage 5 be changed, but also the manner in which the liquid mixed with the bubbles can be changed.
As a mode in which the manner in which the liquid mixed with bubbles is changed, when the bubble generator 1 of the embodiment is arranged in the liquid, the liquid mixed with bubbles is discharged only from one main discharge passage 5. Thus, there is a phenomenon in which liquid is sucked in the other main discharge passage 5.

The bolt insertion hole 7 is formed so as to extend linearly upward from the cavity 2, and one bolt is screwed from the upper surface side of the integrally molded structure 1.
Then, by rotating this bolt with a spanner or screwdriver, the bolt can be moved into and out of the cavity 2, and the length of the bolt protruding into the cavity 2 is adjusted to adjust the diameter of the generated bubble. can do.
In the case of the example, it has been experimentally known that the diameter of the generated bubble increases as the amount of protrusion of the bolt increases.

In the manufacture of the integrally molded structure 1 of the present embodiment, a mold for forming the liquid passage 3, the gas passage 4, the main discharge passage 5, the sub discharge passage 6, the bolt insertion hole 7 and the like is prepared in advance. The mold is filled with a material such as a melted resin, and the resin is cooled and solidified. Then, the mold is separated and the molded product is taken out.
Therefore, it is possible to manufacture a large amount of bubble generating devices having the same structure.

The modification of a present Example is listed.
(1) In the present embodiment, the resin-made integrally molded structure 1 has a pentagonal columnar shape, but is not limited to a pentagonal columnar shape as long as it can form a cavity and various passages therein. Any shape is acceptable.
The material of the integrally molded structure 1 is not limited to resin, and any material can be used as long as it can be processed into a predetermined shape using a mold such as metal or ceramic.
(2) Although the cavity 2 of this embodiment is a short columnar shape and is formed in the substantially central part of the integrally molded structure 1, the shape is not limited to a short columnar shape, but is spherical, elliptical spherical, elliptical columnar and prismatic. The formation position is not limited to the central portion, and may be biased to any surface of the integrally molded structure 1.
(3) In the embodiment, the liquid pipe recess 8 is formed on the front wall surface side where one end of the liquid passage 3 is open, but a cylinder for inserting a pipe or a hose instead of the recess 8 is provided. A convex portion for the liquid pipe may be formed, and a groove or a tapered portion for facilitating connection of the pipe may be provided in the concave portion for liquid piping 8 or the convex portion for liquid piping.
Further, if the diameter or cross-sectional shape of the pipe tip is matched with the diameter or cross-sectional shape of the liquid passage 3, it is not particularly necessary to form the liquid pipe concave portion 8 or the liquid pipe convex portion. (4) In the embodiment, the central axis of the liquid passage 3 is parallel to the bottom and top surfaces of the integrally molded structure 1 and passes only through the region below the center of the cavity 2. Even if it is not parallel to the bottom surface and the top surface of the integrally molded structure 1, the effect is almost the same as long as it passes only the region below or above the center of the cavity 2.
Further, if the vortex flow is not formed at the biased position of the cavity 2, the central axis of the liquid passage 3 of the cavity 2 does not need to pass only the region below or above the center of the cavity 2, It only needs to pass through the region in the cavity 2. In short, the shape and arrangement of the passage may be any as long as the liquid and the gas are merged from the outside inside the integrally formed structure 1 and can be sent into the cavity 2. .
(5) In the embodiment, the gas pipe recess 9 is formed on the surface of the rectangular parallelepiped where the gas passage 4 is opened, but a pipe or hose is used instead of the recess 9. You may form the convex part for cylindrical gas piping for inserting.
Further, if the diameter and the cross-sectional shape of the pipe tip are matched with the diameter and the cross-sectional shape of the liquid passage 3, it is not particularly necessary to form the gas pipe recess 9 and the gas pipe protrusion.
Furthermore, normally, gas such as air or oxygen is positively supplied from a cylinder or the like through a valve so that the gas supply amount can be controlled. However, if a liquid is allowed to flow in the liquid passage 3, it is negatively applied according to Bernoulli's law. Since pressure is generated and air is drawn in, it is not always necessary to fix pipes or hoses. And when there is only such usage, naturally it is not necessary to form the recessed part 9 for gas piping, or the convex part for gas piping.
(6) In the embodiment, the main discharge passage 5 extends in a trumpet shape from the plane corresponding to the upper surface and the bottom surface of the cylinder of the cavity 2 toward the left and right side surfaces, but it may extend linearly or conversely. You may extend so Furthermore, it may extend to only one of the left and right sides, and it may be bent in the middle so that liquid mixed with bubbles can be discharged from the side surface, rear surface or bottom surface of the integrally molded structure 1.
(7) In the embodiment, the sub-discharge passage 6 extends linearly downward from the peripheral surface of the cavity 2, but the extending direction may be upward or backward, and may be bent in the middle. Further, the shape of the passage may be a trumpet shape or may be constricted.
Furthermore, since the amount and diameter of the bubbles discharged from the main discharge passage 5 change by closing the sub discharge passage 6, a plug for closing the sub discharge passage 6 may be prepared. In that case, it is better to provide a concave portion or a convex portion for holding the stopper on any surface of the integrally molded structure 1 near the outlet of the auxiliary discharge passage 6.
Even if the auxiliary discharge passage 6 is not provided, there is no problem in discharging the liquid in which bubbles are mixed from the main discharge passage 5, and therefore it is not necessarily provided. Conversely, by providing a plurality of sub-discharge passages 6 to further diversify the bubble amount and diameter of the liquid in which bubbles are mixed, or by selectively closing the plurality of sub-discharge passages 9, the liquid is discharged from the main discharge passage. It may be possible to change the amount, diameter, and exit of the bubbles in various ways.
(8) In the embodiment, the bolt insertion hole 7 is formed to extend linearly upward from the cavity 2, penetrates the integrally molded structure 1, and one bolt is on the upper surface side of the integrally molded structure 1. However, the direction in which the bolt insertion hole 7 extends may not be upward.
Further, the bolt insertion hole 7 may not be a through hole, and the bolt may be screwed from the cavity 2 side. In that case, it is sufficient that the bolt insertion hole 7 has a depth that allows the bolt to protrude into and out of the cavity 2. The protrusion amount of the bolt can be adjusted by inserting a screwdriver or the like from the sub discharge passage 6 or by inserting a tool such as a spanner from the main discharge passage 5.
Even if the bolt insertion hole 7 is not provided, there is no problem in discharging the liquid in which bubbles are mixed from the main discharge passage 5 and the sub discharge passage 6, and therefore it is not always necessary to provide the bolt insertion hole 7.
(9) The dimensions of the integrally molded structure 1, each passage, and the bolt insertion hole 7 shown in the embodiment are merely examples, and it is needless to say that they must be changed to a size suitable for the use, the scale of the facility, and the like. Absent.

  Application examples of the bubble generating device of the present invention will be listed.

When the injection molding tray (type 1) was cleaned using the bubble generating apparatus of this example, 650 dust particles having a diameter of 0.3 μm that had existed before cleaning were changed to 22 dust particles after cleaning. The dust of 1 μm in diameter, which was 296 before washing, was reduced to 9 after washing, and the dust of 5 μm in diameter, which was 90 before washing, was reduced to 0 after washing.
Also, when the injection molding tray (type 2) was cleaned, 112 particles having a diameter of 0.3 μm, which had been 112 before cleaning, were present in 9 after cleaning and 18 in the same manner before cleaning. The dust having a diameter of 1 μm was reduced to 1 after the cleaning, and the dust having a diameter of 5 μm, which was also present before the cleaning, was reduced to 1 after the cleaning.
When cleaning, in both cases of type 1 and type 2, the tray is placed in the center of the water tank filled with liquid such as water, and the bubble generator of this embodiment is placed below the tray. Allow bubbles to pass from bottom to top. Then, the liquid is poured into the water tank from the outside and overflows, and at the same time, the dust is also flowed out of the water tank, and the dust can be prevented from reattaching to the tray.
When this result was compared with the cleaning result obtained by a conventional cleaning device, it was found that it was the same level as the cleaning result when using not only the bubble generating device but also the ultrasonic cleaning device. When this same level of cleaning is performed with a conventional cleaning device, the number of steps is 5 and the cleaning time is about 20 minutes because two cleaning devices are used together, whereas only the bubble generating device of this embodiment is used. In this case, the number of steps was 2 and the cleaning time was about 6 minutes, so that the workability was improved and the work time was reduced to one third or less.

Furthermore, the bubble generating device of this embodiment is not limited to cleaning of injection molding trays, but is also effective in cleaning various parts such as semiconductor parts, glass substrates of liquid crystal display devices, plating bases, plated surfaces, and rubber products. is there.
In particular, when cleaning various parts, a large number of parts can be cleaned at once by preparing a jig to which a large number of parts to be cleaned can be attached. In that case, the cleaning effect can be improved by swinging the jig during the cleaning by the bubble generating device or applying an impact to the jig.
It has also been confirmed that the amount of dust can be further reduced by performing an impact on the jig after washing with the bubble generator of the present embodiment, and then washing with pure water and drying.
In the cleaning using the bubble generating device, the flow rate of the liquid mixed with the discharged bubbles is also an important factor. However, in the bubble generating device of this embodiment, 2 liters or more, preferably 4 liters per minute. If the above liquid is supplied, a sufficient effect can be exhibited.

Using the bubble generating apparatus of this example, when seawater mixed with bubbles of non-uniform diameter was supplied to aquaculture fish cages, the growth speed of fish could be improved.
The cause is that the amount of dissolved oxygen in seawater in the aquaculture cage increases (as an example, it increases from 9 mg / liter to 12 mg / liter), which promotes the growth of microorganisms and activates seawater. Can be considered.
Although no experiments have been conducted, it can be expected that the same effect will be achieved in the cultivation of freshwater fish.

Using the bubble generating apparatus of this example, when a culture solution mixed with bubbles having a non-uniform diameter was supplied to a culture medium for hydroponics, the growth speed of plants could be improved.
The cause of this is thought to be that bubbles with various diameters hit the roots of the plant, and the culture solution easily penetrates into various parts of the roots, increasing the water absorption from the roots.

DESCRIPTION OF SYMBOLS 1 Integrally molded structure 2 Cavity 3 Liquid passage 4 Gas passage 5 Main discharge passage 6 Sub discharge passage 7 Bolt insertion hole 8 Recess for liquid piping 9 Recess for gas piping

Claims (3)

A liquid passage for flowing a liquid supplied from a pump or water supply from one end to the other end;
A gas passage that joins in the middle of the liquid passage and introduces gas into the liquid passage;
A spherical, elliptical, cylindrical, elliptical or prismatic cavity communicating with the other end of the liquid passage;
And a bubble generator comprising an integrally molded structure having a discharge passage communicating with the cavity and discharging the liquid and the gas to the outside,
The central axis of the liquid passage passes only through a region below the center of the cavity or only a region above the center of the cavity ,
A bubble generating device comprising a bolt capable of appearing and retracting in the cavity . A liquid passage for flowing a liquid supplied from a pump or water supply from one end to the other end;
A gas passage that joins in the middle of the liquid passage and introduces gas into the liquid passage;
A spherical, elliptical, cylindrical, elliptical or prismatic cavity communicating with the other end of the liquid passage;
And a discharge passage communicating with the cavity and discharging the liquid and the gas to the outside
A bubble generating device comprising an integrally molded structure comprising:
The central axis of the liquid passage passes only through a region below the center of the cavity or only a region above the center of the cavity,
The discharge passage includes a main discharge passage extending in the left-right direction from the cavity and a sub-discharge passage extending downward, upward or rearward from the cavity, and the sub-discharge passage is formed narrower than the main discharge passage. features and to Luba Bull generating device. Bubble generating device according to claim 1 or 2, characterized in that said integrally molded structure is made of resin.

Images