JP6935949B2 - Nano bubble generator - Google Patents

Description

The present invention relates to a nanobubble generator, and more particularly, to a nanobubble generator capable of stably forming nanobubbles by stirring bubbles formed by supplying a gas into a liquid such as water.

Water containing minute bubbles having a diameter of about several tens of μm, which can be formed by supplying air to the water in the aquarium, is used to promote the growth of plants and the like, or to promote the adsorption of dirt components and the like. Is being considered.
In particular, bubbles generally called nanobubbles, which are smaller in diameter than the above-mentioned minute bubbles, for example, nanobubbles having a diameter of several tens of nm to several hundreds of nm, float in water without disappearing immediately and have a long length. Since it is said that it can continue to exist in water over time, various methods of using water containing nanobubbles have been the subject of research.

As an apparatus for forming or generating such nanobubbles, for example, the configuration described in Patent Document 1 is known.
The apparatus described in Document 1 includes a gas discharge head immersed in water, a gas supply means for supplying gas to the gas discharge head, and a vibration means for vibrating the gas discharge head. It is said that nanobubbles can be discharged into water by vibrating the gas discharge head via the vibration applying means.

Japanese Unexamined Patent Publication No. 2019-181336

In the bubble generator of Patent Document 1, nanobubbles are formed by vibrating the gas discharge head by vibrating means, and bubbles formed by supplying gas into water without using vibrating means. Therefore, a bubble generator that creates nano-sized bubbles has not yet been provided.

Here, an object of the present invention is to provide a nanobubble generator capable of forming nanobubbles by stirring bubbles released into a liquid together with the liquid without using a vibrating means.
Another object of the present invention is to provide a nanobubble generator capable of stably forming nanobubbles by maintaining a constant surface state in a stirring plate as a means for stirring.

In order to achieve the above object, the present invention adopts the configuration described in the claims. Specifically, a main body having a space for containing a liquid inside, a gas supply means for supplying a gas into the liquid contained in the main body, and passing the supplied gas through a predetermined micropore. A bubble forming means for forming bubbles, a stirring means for forming nanobubbles by stirring the bubbles formed by the bubble forming means together with the liquid in the main body, and a cleaning means for cleaning the surface of the stirring means. Prepare ,
The main body includes a tubular portion extending in the vertical direction.
The agitating means, configurations and rectangular agitating plate located on the tubular portion along said tubular portion, the widthwise center of the agitating plate Ru is constituted by a swinging means for swinging the rotational center, that Is taken.

In the present invention, it is possible to adopt a configuration in which a partition member in which the micropores are formed is arranged inside the main body, and bubbles are formed by passing a gas from a gas supply means through the micropores. preferable.

Also, the prior SL cleaning means comprises a wire brush in contact with each surface of the mixing plate, the wire brush adopts a configuration that is movable along the width direction of the agitating plate.

According to the present invention, nanobubbles can be generated by adopting the stirring means, and the liquid containing the bubbles can be applied and applied to various fields.
Further, since vibration is not applied to the device when forming the nanobubbles, problems such as loosening and displacement of the constituent members can be less likely to occur, and maintenance-free in this respect can be expected.
Further, since the stirring plate is sandwiched between the wire brushes and rotated while moving in the width direction of the stirring plate, the surface condition of the stirring plate is always kept constant, for example, impurities contained in the liquid and the like. There is no inconvenience that the bubble formation efficiency is affected by the adhesion of the particles.

The whole block diagram which shows the use state of the nano bubble generator which concerns on embodiment. The front view of the main part of the apparatus. Right side view of FIG. Top view of FIG. The schematic perspective view for demonstrating the stirring means, the cleaning means, and the substructure of a main body. Schematic cross-sectional view showing a path for supplying liquid and gas to the main body. Explanatory drawing which shows the drive system of a cleaning means. Explanatory drawing which shows the mechanism which shakes a stirring means.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the nanobubble generator 10 is mounted on the upper end opening 11A of the water tank 11 and used. Tap water W (see FIG. 2) is stored as a liquid in the water tank 11.

The nano bubble generator 10 has a main body 15 having a storage space in which water W is filled inside via a water supply pump P1 while being immersed in the water tank 11, and a gas that supplies a gas such as air into the main body 15. An air pump P2 constituting the supply means 16, a bubble forming means 17 provided in the main body 15, and a stirring means for forming nanobubbles by stirring the bubbles formed by the bubble forming means 17 together with water W in the main body 15. 18 and a cleaning means 20 for maintaining a constant surface state of the stirring means 18 are provided.

In the present embodiment, the main body 15 is an open upper end type having a tubular portion 21 having a substantially circular cross-sectional shape and a bottom wall portion 22 located at the lower end portion of the tubular portion 21. The water supply pump P1 is connected to the lower outer periphery of the tubular portion 21, and an elbow 25 for connecting a hose 24 (see FIG. 3) forming the gas supply means 16 together with the air pump P2 is provided. The elbow 25 is provided at a position displaced by approximately 90 degrees in the circumferential direction with respect to the water supply pump P1. Further, on the upper side of the tubular portion 21, holes 21A (see FIG. 1) are provided at four positions separated by 90 degrees in the circumferential direction, and water containing nanobubbles is watered through these holes 21A. It is designed to flow out or recirculate in W.
The main body 15 is supported by the support plate 26 by connecting the upper end thereof to the support plate 26 mounted on the opening 11A of the water tank 11, and the upper end of the main body 15 faces a hole (not shown) of the support plate 26. It has become like. Here, the material of the main body 15 is aluminum (A1070) in the present embodiment, and a material having an inner diameter of about 140 mm and a length of about 873 mm is used.

The bubble forming means 17 cooperates with the air pump P2 to form bubbles in water, and the bubble forming means 17 is a partition located above the bottom wall portion 22 as shown in FIG. It is composed of a large number of micropores 35 provided in the member 28. The partition member 28 includes a lower plate 29 and an upper plate 30 as shown in FIG. The diameters of these plates 29 and 30 are about 139.5 mm in diameter in this embodiment.
The lower plate 29 is provided with gas supply ports 29A to which pipes 31 for distributing air from the air pump P2 are connected to the main body 15, and water supply to which pipes 32 connected to the water supply pump P1 are connected. Port 29B is provided in one place. In the present embodiment, the water supply pump P1 is provided on the outside of the main body 15, but the water supply pump P1 is suspended by the partition member 28 without providing the bottom wall portion 22 of the main body 15. The discharge port of the water supply pump P1 can also be connected to the water supply port 29B.

The upper plate 30 is formed with a large number of micropores 35 connected to the gas supply port 29A via the chamber 34 and holes 36 connected to the water supply port 29B. The micropores 35 have the function of discharging the air supplied from the air pump P2 into water as minute bubbles. In the present embodiment, the thickness of the upper plate 30 is about 10 mm, and the diameter of the micropores 35 is about 0.3 mm. Further, the number of micropores 35 is 75 each at 180-degree symmetrical positions of the upper plate 30, for a total of 150.

As shown in FIGS. 7 and 8, the stirring means 18 swings a rectangular stirring plate 38 located in the tubular portion 21 along the tubular portion 21 and the stirring plate 38. It is composed of a swinging means 40.
The stirring plate 38 is not particularly limited, but in the present embodiment, it is composed of an aluminum plate (136 mm) having a thickness of about 5 mm and a length of about 750 mm and a width slightly smaller than that of the partition member 28. .. As shown in FIG. 8, the upper end of the stirring plate 38 is connected to the swinging means 40 side via the bracket 41 and the rotating shaft member 52, while the lower end is the said. It is rotatably supported via a support member 42 having a shaft 43 penetrating the center of the partition member 28, whereby the stirring plate 38 can swing about the center in the width direction as the center of rotation.

As shown in FIGS. 7 and 8, the swinging means 40 includes a motor 44 arranged on the support plate 26, a rotating plate 46 connected to an output shaft 45 of the motor 44, and the rotating plate. A rod-shaped frame 50 that is swingably provided in the direction of arrow A in FIG. 8 via a pin 47 provided on the lower surface side of the 46, and a rotation shaft that is fixedly supported by the frame 50 and extends downward. It is configured to include a member 52. An elongated hole 50A along the length direction of the frame 50 is provided in the plane of the frame 50, and the bearing 53 provided at the lower end of the pin 47 is received in the elongated hole 50A, thereby receiving the bearing 53. When the motor 44 is driven and the output shaft 45 is rotated, the pin 47 reciprocates along the elongated hole 50A, and the frame 50 swings around the rotating shaft member 52, thereby simultaneously causing the stirring plate 38. Is designed to swing. In the present embodiment, the length of the elongated hole 50A is set so that the angle of the swing range is about 25 degrees. The rotation speed of the motor 44 is about 300 rpm.
A substantially semicircular plate-shaped dog 54 is attached to the upper surface side of the rotating plate 46, and an optical sensor 55 having a light emitting portion and a light receiving portion is arranged in the vicinity thereof. The dog 54 is configured to pass between the light emitting unit and the light receiving unit, and the stirring plate 38 is in the neutral position at the timing when the dog 54 rotates in a plane and the sensor 55 enters light blocking from light transmission. It is possible to understand that it is. The term "neutral" is used for a position where the surface of the stirring plate 38 is parallel to the moving direction of the wire brush constituting the cleaning means 20, that is, the X direction in FIG.

As shown in FIG. 7, the cleaning means 20 is in a neutral position with a pair of metal wire brushes 57 arranged so as to sandwich the stirring plate 38, a drive device 58 for rotating the wire brushes 57, and a drive device 58 for rotating the wire brushes 57. Includes a moving device 59 that advances and retreats the wire brush 57 along the width direction of the stirring plate 38.
The wire brush 57 is configured by planting a large number of wires 57B on a central axis 57A oriented in the vertical direction. The preferred material of the wire 57B is brass, and the wire diameter thereof is about 0.08 mm. Further, the wire brush 57 has a diameter of about 45 mm. The length of the wire brush 57 in the axial direction is preferably about 600 mm.

As shown in FIGS. 7 and 8, the drive device 58 includes an upper and lower two-stage drive pulley 63 fixed to an output shaft 62 of a motor 61 located on a support plate 26, and a central shaft of each wire brush 57. A driven pulley 64 fixed to the upper end of the 57A and a belt 65 wound around the drive pulley 63 and the driven pulley 64 are provided. Here, of the two driven pulleys 64, one of the driven pulleys 64 is connected to the upper drive pulley 63, and the other driven pulley 64 is connected to the lower drive pulley 63, whereby the two wire brushes are connected. 57 can be rotated synchronously.
The upper and lower two-stage drive pulleys 63 have the same diameter, and the distances from the centers of the drive pulleys 63 to the centers of the driven pulleys 64 are equal to each other. Therefore, the two wire brushes 57 located on the central axis of each driven pulley 64 are located on a straight line in the Y direction in which the respective central axes are orthogonal to the X direction in FIG. 7.

The moving device 59 includes a portal frame 67 arranged so as to straddle the drive pulley 63, a pair of arms 68 connected to the lower portion of the portal frame 67 and directed toward the swinging means 40, and these. A bearing 69 that is attached to the tip of the arm 68 to support the central shaft 57A and a pair of guide rails 70 that are fixed to the portal frame 67 and arranged outside the portal frame 67 allow straightness. The slider 71 that secures the bearing, the link arm 72 that moves the portal frame 67 forward and backward in the direction of the arrow X in FIG. 7, the drive motor 73 that swivels the link arm 72 in the horizontal plane, and the central axis 57A of the wire brush 57. A guide piece 75 is provided by sandwiching a bearing 74 (see FIG. 5) provided at the lower end of the wire brush with the stirring plate 38 and maintaining a constant contact pressure of the wire brush 57 with respect to the stirring plate 38 in the axial direction. It is composed of. The guide piece 75 is supported by a support column 76 erected on the partition member 28.

Reference numeral 78 in FIG. 1 indicates an upper cover of the bubble generator 10, and reference numeral 79 indicates an operation panel. Reference numeral 80 in FIG. 8 indicates a bearing unit of the rotating shaft member 52.

Next, the operation of the bubble generator in this embodiment will be described.

As shown in FIG. 2, when the water supply pump P1 is driven in a state where the main body 15 of the bubble generator 10 is immersed in the water tank 11, the water W in the water tank 11 becomes the pipe 32 as shown in FIG. , It is supplied into the main body 15 through the water supply port 29B and the hole 36.
Further, the air supplied to the chamber 34 through the pipe 31 and the gas supply port 29A by driving the air pump P2 passes through the micropores 35 and becomes bubbles and is discharged into the main body 15.
Next, when the stirring means 18 is driven and the stirring plate 38 is shaken, the water and bubbles in the main body 15 are subjected to the stirring action, so that the bubbles are further reduced and nanobubbles are formed. According to this embodiment, nanobubbles having a diameter of several tens of nm to several hundreds of nm are formed.

The water containing nanobubbles continuously flows out into the water tank 11 from the hole 21A provided in the upper part of the main body 15, while the water in the water tank 11 is taken into the main body 15 and continuously operates thereafter. The water in 11 becomes water sufficiently containing nanobubbles, and the water is sucked by a pump or the like (not shown) and used for various purposes such as use for cultivation.

By continuing the stirring by the stirring plate 38 in this way, slippage adheres to the stirring plate 38 for some reason, and impurities and the like contained in water adhere to the stirring plate 38 and change to the initial surface state. May cause hygiene problems and adverse effects such as affecting the efficiency of nanobubble formation.
Therefore, at a predetermined timing, for example, every time a preset operation time elapses, the cleaning means 20 is driven, and the wire brush 57 is rotated along the surface of the stirring plate 38 in the width direction of the stirring plate 38. The surface of the stirring plate 28 can be cleaned by reciprocating for a time and scraping the surface of the stirring plate 28 with the tip of the wire 57B, whereby the surface state of the stirring plate 38 can always be returned to the initial state.

When cleaning with the wire brush 57, the stirring plate 38 is kept stopped at the neutral position. That is, the surface of the stirring means 38 is maintained at a position parallel to the straight line in which the wire brush 57 moves.
As a result, the wire brush 57 can move smoothly while rolling on the surface of the stirring plate 38 during cleaning, and there is no inconvenience that causes malfunction.

Therefore, according to the embodiment of the present invention, it is possible to obtain an effect that stable operation can be performed without applying vibration or the like to the means constituting the device.
In particular, since the surface of the stirring plate 38 can be cleaned, the surface of the stirring plate 38 can always be maintained in the initial state, and there is no risk of affecting the nanobubble formation efficiency, and the formation of nanobubbles. At that time, it is possible to expect a certain operation.

The best configuration, method, and the like for carrying out the present invention are disclosed in the above description, but the present invention is not limited thereto.
That is, the present invention is particularly illustrated and described with respect to a particular embodiment, but with respect to the embodiments described above without departing from the scope of the technical idea and purpose of the present invention. Those skilled in the art can make various modifications.
For example, in the above-described embodiment, numerical values such as dimensions of each part have been described, but these should be understood as being shown in order to make it easy to grasp the size and performance of the entire apparatus, and nanobubbles according to the present invention. It does not limit the generator. Therefore, it does not prevent the change as necessary in the implementation.
Further, the fluid is not limited to water, but may include other liquids or a case where the fluid is mixed with other liquids, and it is conceivable to use a gas other than air as the gas.
Further, the stirring plate 38 constituting the stirring means 18 can be formed of a metal plate other than the aluminum plate. However, if an aluminum plate is used, it will be advantageous in terms of weight reduction of the device.
Further, the brush 57B of the wire brush 57 may also be made of a metal wire other than brass.
Further, as the cleaning means 20, for example, a scraper or the like that slides on the surface of the stirring plate 38 can be adopted.
In short, the present invention has various design changes as long as it has a function of stirring water and air supplied in the main body 15 to form nanobubbles and returning or maintaining the surface of the stirring plate 38 to the initial state. It can be performed.

10 Nano bubble generator 16 Gas supply means 17 Bubble forming means 18 Stirring means 20 Cleaning means 21 Cylindrical part 28 Partition member 35 Micropores 38 Stirring plate (stirring means)
40 Swinging means 57 Wire brush (cleaning means)
W water (liquid)

Claims (3)

A main body having a space for containing a liquid inside, a gas supply means for supplying a gas into the liquid contained in the main body, and a bubble are formed by passing the supplied gas through a predetermined micropore. A bubble forming means, a stirring means for forming nanobubbles by stirring the bubbles formed by the bubble forming means together with the liquid in the main body, and a cleaning means for cleaning the surface of the stirring means are provided .
The main body includes a tubular portion extending in the vertical direction.
The stirring means is composed of a rectangular stirring plate located in the tubular portion along the tubular portion and a swinging means for swinging around the center of the stirring plate in the width direction as a rotation center. A featured nanobubble generator. The nanobubble according to claim 1, wherein a partition member in which the micropores are formed is arranged inside the main body, and bubbles are formed by passing a gas from a gas supply means through the micropores. Generator. The nanobubbles according to claim 1 or 2, wherein the cleaning means includes a wire brush in contact with each surface of the stirring plate, and the wire brush is provided so as to be movable along the width direction of the stirring plate. Generator.

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