KR101201693B1 - bubble generating apparatus - Google Patents

Abstract

PURPOSE: A bubble generating device is provided to make fine bubbles by repeatedly providing impulse waves to water contained in a drum. CONSTITUTION: A bubble generating device is connected to two forward-reverse motors(10,20). A plurality of first wing parts(51) is included on the inner peripheral surface of a drum(60) driven by one of the two motors. An agitating shaft(50) is pivotally installed in the other motor between the two motors by penetrating the central part of the drum. A plurality of second wing parts(61) is installed on the circumference of the agitating axis. The plurality of second wing parts is counter to the plurality of first wing parts.

Description

Bubble generating apparatus

The present invention relates to a bubble generator.

Bubbles are the pockets of gas in the liquid, that is, bubbles. Microbubbles are much smaller than ordinary bubbles among them, and mean bubbles of a size so small that the size should be expressed in nanometers. Microbubbles have different characteristics from ordinary bubbles in the following three aspects.

First, ordinary bubbles of more than a few millimeters in diameter or size in a liquid rise upwards and burst at the surface of the liquid. The bubble rises because the buoyancy of the bubble is greater than the resistance of the liquid. Microbubbles, on the other hand, stay in liquid for a long time. The reason for this is that the buoyancy of the microbubbles is very small and thus cannot overcome the resistance of the liquid.

Second, when the microbubble stays in the liquid for a long time, as the gas inside the microbubble gradually dissolves into the liquid through its surface, the size thereof becomes smaller. Moreover, when the solubility of the gas inside the microbubble is large in the liquid, the bubble itself may be completely dissolved and disappeared.

Third, the smaller the size of the bubble, the greater the ratio of surface area to volume, so that the speed and efficiency of dissolving the gas inside the microbubble in the liquid increases.

These three features of the microbubbles enable the various applications of nanobubbles.

In the case of water treatment, it is possible to shorten the treatment time to improve the water quality by effectively injecting air into the water, and in the case of sewage treatment, various odorous substances dissolved in the sewage by effectively injecting oxidizing gas such as ozone into the sewage. It is opening the way to effectively disintegrate or remove it, and in the case of washing treatment, the washing solution and the rinsing water are made into oxygen-activated water containing high concentration of dissolved corals, which has a strong cleaning function and a sterilizing function to improve the cleaning degree and It is possible to drastically reduce the cleaning time.

In addition, the fine bubble of the detergent is also utilized during the laundry treatment.

Detergent molecules generally consist of hydrophilic and lipophilic groups. When the detergent is dissolved in water, the detergent molecules are aligned at the interface (water surface), and the detergent molecules that cannot be lined up are present individually or as a group in the water. When the detergent molecules at the interface are removed, the detergent molecules in the water immediately move to the interface to be replenished.

At this time, when bubbles are sent to the detergent liquid, the bubbles rise to reach the interface (water surface), and bubbles of a form in which the detergent molecules aligned at the interface are kept in the bubble film as they are are generated. Since this bubble arranges as many detergent molecules as possible, the detergent concentration also becomes high. In addition, the detergent molecules in the liquid move to replenish the detergent molecules disappeared as bubbles, and bubbles are sequentially formed when bubbles are sent one after another. The lipophilic group is arrange | positioned on the outer membrane side of this bubble.

By passing the bubble through the surface of the soiled garment or through the garment, the lipophilic group combines with the grease and adheres to the grease and disappears. In addition, when the bubble bursts through the clothing, a high concentration of the detergent liquid penetrates deeply into the clothing, thereby making it easy to fall off. Cleaning of clothing by bubbles becomes possible.

As mentioned above, by making the melted washing liquid into the detergent bubble and spreading it on the laundry in the rotating drum, the detergent component can be easily acted upon at the time of the laundry in the rotating drum, and it is easy to infiltrate a high concentration of the washing liquid deeply. It is possible to reduce washing stains and to improve the washing power, thereby shortening the washing time.

Conventional apparatus for generating a microbubble, as disclosed in Patent Registration No. 10-1125851, has a tubular part in which the inlet and outlet are connected in a straight line, the tubular part is wider and narrower inlet, the middle is the narrowest and again It gradually widens and the diameter of the outlet is the same as the diameter of the inlet. Further, a small diameter pipe for supplying compressed air is connected to the middle of the suction port middle portion of the tubular portion so as to be able to flow. In addition, the conventional microbubble generating device is provided with an air compressor for providing compressed air and a pump for compressing and supplying water.

The conventional microbubble generating device having such a structure has an advantage that the air bubble in the water is compressed and then suddenly diffused, so that the microbubble is split into a very small size to generate a microbubble. However, the size of the microbubbles made in this way is much smaller than the nanoscale, no matter how small, and the distribution is much less homogeneous, reaching a few millimeters. Such microbubbles have a much lower efficiency of dissolving target gases in liquids compared to nanobubbles.

In addition, the conventional microbubble generating device requires a compressor for supplying compressed air and a water supply pump for supplying water, and thus, has a problem that the manufacturing cost and maintenance cost are increased due to the structural complexity.

The present invention has a problem in solving the above problems.

The present invention connects two stationary motors in series, attaches a plurality of first blades to an inner circumferential surface of a drum driven by one of the two motors, and provides a stirring shaft driven by the other one of the two motors. The subject can be solved by providing a plurality of second blade portions opposite to the plurality of first blade portions around the stirring shaft and rotatably provided through the central portion of the drum.

The present invention by repeatedly supplying air to the water contained in the drum by the first and second blades that rotate in the opposite direction to each other repeatedly to give a shock wave, it is possible to generate a finer bubble than a conventional fine bubble device In addition, the structure is simpler than the conventional microbubble device, thereby lowering manufacturing cost and maintenance cost.

1 is a conceptual diagram of a bubble generating apparatus of an embodiment of the present invention,
Figure 2 is a view of the drum and the stirring shaft of Figure 1 seen from the right,
3 is a plan view (top) and a side view (bottom) of the first and second wings of Figure 1,
4 is a view of the drum and the stirring shaft of Figure 1 cut, and
5 is a conceptual diagram of a bubble generating apparatus of a modified embodiment of the present invention;

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

In Fig. 1, the bubble generator of this embodiment is indicated by the reference numeral 100.

The bubble generating device 100 is rotatably supported on one side wall of the tank (1), the upper side of the tank (1), the liquid is filled or flow to a certain level, such as water, and the other side is open to the The liquid filled in the tank 1 is allowed to enter and exit, and both ends thereof are rotatable in the drum 60 and the drum 60, which are driving objects disposed on the liquid level of the tank 1 in the vertical direction. It includes a stirring shaft (50) that is a driving object that is supported and penetrates the drum (60).

In particular, one end of the stirring shaft 50, as shown in Figure 2, is rotatably supported by a crisscross bracket (2) provided on the other side of the drum (60).

The outer circumferential surface of the stirring shaft 50 is provided with a plurality of first blades 51 convexly convex in the counterclockwise direction with the same phase difference, and the plurality of first wings on the inner circumferential surface of the drum 60. A plurality of second blades 61 facing radially with each of the parts 51 and bent convexly in a clockwise direction in a state spaced apart from each of the plurality of first wings 51 by a predetermined distance in the radial direction are provided. It is.

The first and second wing parts 51 and 61 have the same number.

Further, each of the plurality of first wings 51 extends over the entire length of the stirring shaft 50 in the longitudinal direction and extends radially outwardly, and each of the plurality of second wings 61 is a drum ( 60) and extend radially inwardly over the length of the longitudinal field.

As shown in FIG. 3, each of the plurality of first wing parts 51 penetrates in the thickness direction at a predetermined interval along at least one of the longitudinal direction and the width direction of the first wing part 51. The plurality of through holes 51a are formed, and each of the plurality of second wing portions 61 is at least one of a length direction and a width direction of the second wing portion 61 as shown in FIG. 3. A plurality of through holes 61a penetrated in the thickness direction at regular intervals along one direction are formed.

As shown in FIG. 4, each of the plurality of through holes 51a is narrowed in diameter from the clockwise upstream to the downstream, so that the entirety of the plurality of through holes 51a is in the shape of a funnel. As shown in Fig. 4, the diameter becomes narrower from the counterclockwise upstream to the downstream to form a funnel as a whole.

Bubbles passing through the funnel-shaped through holes 51a and 61a received the first pressure at the portion with the largest cross section while moving to the downstream end of the through hole, and the portion which became the smallest as it exited the through hole. In the process of increasing pressure at, the additional explosion causes the nanobubbles to break apart.

In addition, the bubble generator 100 is a first motor 10 for rotating the rotary shaft 11 coupled to one end of the stirring shaft 50, which is a driving object in a clockwise direction, and the first motor 10 Rotating shaft 21 is coupled to stator 13 or case 12 of the first motor 10 by rotating the stator 13 or case 12 of the first motor 10 counterclockwise. And a second motor 20 for rotating the drum 60 coupled to the stator 13 or the case 12 in a counterclockwise direction.

The stator 13 or case 12 of the first motor 10 is coupled to the drum 60, which is a driving object, via a bracket 62, and the bracket 62 of the jaw 1 It is rotatably penetrated through one side wall.

The stator 13 or case 12 of the first motor 10 is fixed to the rotation shaft 21 of the second motor 20 so that the center axes of these rotation shafts 11 and 21 are coaxial. The first and second motors 10 and 20 are coupled in series.

The first and second motors 10 and 20 include stators 13 and 23 internally fixed to each of the cases 12 and 22 as in the prior art, And rotation shafts 11 and 21 internally fixed to the rotors 14 and 24, respectively.

The stator 23 or the case 22 of the second motor 20 is fixed to the base 40.

Although the case 22 is fixed to the base 40 and the rotation shaft 21 is fixed to the case 12 in the drawings for describing the present embodiment, the stator 23 is directly fixed to the base 40. In addition, the rotation shaft 21 may be directly fixed to the stator 12.

The bubble generator 100 configured as described above may be operated as follows.

When the first and second motors 10 and 20 are driven, the stirring shaft 50 rotates clockwise, and the drum 60 rotates counterclockwise.

Therefore, the plurality of first blades 51 of the stirring shaft 50 are submerged in the liquid level located on the right side with respect to the stirring shaft 50 to exit from the left liquid level, the plurality of the drum 60 Two second wings 61 are submerged at the liquid level positioned on the left side with respect to the stirring shaft 50 to exit from the right liquid level.

Accordingly, since the plurality of first and second wing parts 51 and 61 are disposed with the same phase difference, the counterclockwise external force and the first wing of the second wing part 61 are simultaneously simultaneously on the left liquid surface. The liquid oscillates under the clockwise external force of the unit 51, and simultaneously receives the counterclockwise external force of the second wing unit 61 and the clockwise external force of the first wing unit 51 at the right liquid level. The liquid in the tank 1 oscillates, and at the same time, the left liquid level is shocked by the counterclockwise external force of the second wing portion 61, and a shock wave is generated at the left liquid level, and the first wing portion ( The right liquid level is shocked by the clockwise external force of 51 to generate a shock wave at the right liquid level.

In addition, since the second blade portion 61 is convex in the clockwise direction, the second blade portion 61 located on the liquid surface is present on the liquid surface when the second blade portion 61 located on the liquid surface rotates in a counterclockwise direction to obtain the left liquid surface. The air to be discharged is contained in the concave portion 63 of the second wing portion formed by the convex shape and guided to the bottom of the liquid level. Bubbles, which are air submerged below the liquid level, exist in the shape of the through hole 61a, and The counter-clockwise movement of the two-winged portion has an elongated tubular portion, and the bubble having the tubular portion is broken up by the shock wave and the oscillation.

In addition, since the first wing 51 is convex in the counter system direction, when the first wing 51 positioned on the liquid surface rotates clockwise to obtain the right liquid surface, the first wing 51 is present on the liquid surface. Air is contained in the concave portion 53 of the first wing formed by the convex shape and guided to the bottom of the liquid level. Bubbles, which are air submerged below the liquid level, exist in the shape of the through-hole 51a, and then the first portion is formed. The clockwise motion of the wing part results in an elongated tubular part shape, and the bubble having the tubular part shape is split by the shock wave and the oscillation.

The phenomenon in which the bubble is split by the shock wave is the same as the phenomenon in which the sea water hits the rock by the waves to create a lot of bubbles.

As a result, the bubble generating device of the present invention repeatedly gives shock waves while repeatedly supplying air to the liquid contained in the drum by the first and second blades which rotate in opposite directions. Not only makes it possible to generate bubbles, but also the structure is simpler than the conventional microbubble device, thereby lowering manufacturing cost and maintenance cost.

Hereinafter, a modified embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 5, the bubble generating apparatus of the modified embodiment includes a stopper 25 that stops the rotation shaft when the motor is stopped and the first motor and the second motor are provided. And the bubble generator of the above embodiment except that the later-operated motor of the second motor is capable of rotating the rotation shaft in the forward and reverse directions.

The stopper 25 of the first and second motor If power is not supplied to the motor, the magnet will be magnetized to hold the rotation axis of the motor to prevent the rotation shaft from rotating. If power is supplied to the motor, the motor will be non-magnetic to release the noise on the rotation shaft of the motor so that the rotation shaft becomes free. Can be an electronic chuck.

The bubble generator of the above modified embodiment can be operated as follows.

For reference, the motor which is driven later among the first and second motors is set such that the rotating shaft has a clockwise rotational speed and a counterclockwise rotational speed twice as large as the rotational speed of the rotating shaft of the motor which is initially driven.

1.When the first motor is driven clockwise and at the same time the second motor is driven counterclockwise,

The microbubbles may be generated in the same manner as in the above embodiment.

2. When the second motor is started first

The second motor 20 is supplied by supplying power to the second motor 20 in a state in which the stopper 25 fixes the rotary shaft 11 of the first motor 10 by stopping the first motor 10. A counterclockwise rotation force is generated between the stator 23 and the rotor 24 of FIG.

In the first state, since the rotary shaft 11 is fixed to the rotary shaft 21 of the second motor 20 via the case 12 by the stopper 25, together with the rotary shaft 21. Rotate counterclockwise. As a result, the bubble generator of the above-described embodiment supplies air into the liquid surface only by the second blade portion 61 of the drum 60 to generate fine bubbles by the shock waves of the first and second blade portions 51 and 61. Can be generated.

Supplying power to the first motor 10 in the first state to release the fixed state of the rotary shaft 11 by the stopper 25 in the counterclockwise direction to the rotary shaft 11 of the first motor 10. The rotational force is applied to create a second state.

In the second state, the rotation shaft 21 of the second motor 20 rotates the stator 13 fixed to the case 12 of the first motor 10 in the counterclockwise direction. Since the rotational force in the counterclockwise direction is transmitted to the rotation shaft 11 of the motor 10, the rotational force transmitted to the rotation shaft 11 of the first motor 10 is doubled to the first blade of the stirring shaft 50 The part 51 is turned twice as fast as the second blade part 61 of the drum 60, so that the bubble generator of the above-described embodiment supplies air into the liquid surface only by the second blade part 61 of the drum 60. The microbubble can be generated by the shock wave of the first wing part 51 larger than the shock wave of the second wing part 61 and the shock wave of the second wing part 61.

In the second state, a clockwise rotational force is applied to the rotation shaft 11 of the first motor 10 to create a third state.

Wherein in the third state, the rotational force of the rotational force is generated between the stator 13 and the rotor 14 of the first motor in the clockwise direction in the clockwise direction to the rotary shaft 11 of the first motor 10 is passed However, since the case 12 or the stator 13 of the first motor 10 is rotated counterclockwise by the second motor 20, the shaft 11 in the clockwise direction of the first motor 10 is rotated. The rotational force of the weakened the first blade portion 51 of the stirring shaft 50 is faster than the second blade portion 61 of the drum 60 is rotated at a speed larger than 1 times and less than 2 times, the embodiment of the modification The bubble generating device supplies air into the liquid level by the second blade portion 61 of the drum 60 and the first blade portion 51 of the stirring shaft 50, so that the shock wave of the second blade portion 61 A fine bubble can be generated by the shock wave of the first wing part 51 larger than the shock wave of the two wing parts 61.

In the third state, if the speed of the rotation shaft 11 of the first motor 10 and the rotation shaft 21 of the second motor 20 are the same to make the fourth state, bubbles are generated as in the embodiment. You can.

In the fourth state, when power is not supplied to the first motor 10, the first state may be switched directly to the first state, and when power is not supplied to the second motor 20, the fifth motor may be in a fifth state. .

In the fifth state, only the first motor 10 is processed so that only the stirring shaft 50 is rotated clockwise at a higher speed than the fourth state while the drum 60 is stopped. The air is supplied into the liquid surface only by the first blade portion 51 of the stirring shaft 50, and the fine wave is generated by the shock wave of the first blade portion 51 larger than the shock wave of the first blade portion 51 in the fourth state. Bubbles can be generated.

The operation and stop of the first and second motors 10 and 20 are controlled by the rotational speed information received from an encoder provided in each of the first and second motors 10 and 20 and the predetermined time information set therein, And can be controlled by a computation program of a control device (not shown) provided in a possible driving device.

3. When the first motor is started first

The first motor 10 is supplied with power to the first motor 10 in a state in which the second motor 20 is stopped and the stopper 25 fixes the rotation shaft 21 of the second motor 20. Generate a first state by generating a clockwise rotation force between the stator 13 and the rotor 14.

In the first state, since the case 12 is fixed to the second rotation shaft 21 fixed by the stopper 25, the rotation shaft of the first motor 120 according to the Newton's action and reaction law ( Only 11) is rotated clockwise to rotate clockwise with the stirring shaft (50). As a result, the bubble generator of the modified embodiment may supply air into the liquid surface only by the first blade unit 51 of the stirring shaft 50 to generate fine bubbles by only the shock wave of the first blade unit 51. have.

Rotation force in the clockwise direction to the rotation shaft 21 of the second motor 20 while releasing the fixed state of the rotation shaft 21 by the stopper 25 by supplying power to the second motor 20 in the first state. Is applied to create a second state.

In the second state, the first motor in a state in which the rotation shaft 21 of the second motor 20 rotates the stator 13 fixed to the case 12 of the first motor 10 in a clockwise direction. Since the rotational force in the clockwise direction is transmitted to the rotational shaft 11 of the 10, the rotational force transmitted to the rotational shaft 11 of the first motor 10 is doubled so that the first blade portion of the stirring shaft 50 ( 51 is turned twice as fast in the clockwise direction than the second blade portion 61 of the drum 60, the bubble generating device of the modified embodiment only into the liquid level by the first blade portion 51 of the stirring shaft 50 By supplying air, a microbubble may be generated by the shock wave of the first wing part 51 larger than the shock wave of the second wing part 61 and the shock wave of the second wing part 61.

In the second state, a counterclockwise rotational force is applied to the rotation shaft 21 of the second motor 20 to create a third state.

Wherein in the third state, the rotational force of the rotational force is generated between the stator 13 and the rotor 14 of the first motor in the clockwise direction in the clockwise direction to the rotary shaft 11 of the first motor 10 is passed However, since the case 12 or the stator 13 of the first motor 10 is rotated counterclockwise by the second motor 20, the shaft 11 in the clockwise direction of the first motor 10 is rotated. Of torque is weakened The first blade portion 51 of the stirring shaft 50 is turned faster than the second blade portion 61 of the drum 60 at a speed larger than 1 times and less than 2 times, the bubble generator of the modified embodiment is a drum Air is supplied into the liquid level by the second wing 61 of 60 and the first wing 51 of the stirring shaft 50, so that the shock wave and the second wing 61 of the second wing 61 are 61. Microbubbles may be generated by the shock wave of the first wing part 51 larger than the shock wave of

In the third state, if the speed of the rotation shaft 11 of the first motor 10 and the rotation shaft 21 of the second motor 20 are the same to make the fourth state, bubbles are generated as in the embodiment. You can.

In the fourth state, if power is not supplied to the second motor 20, the power supply may be directly switched to the first state, and if power is not supplied to the first motor 10, the fifth motor may be in a fifth state. .

In the fifth state, only the second motor 20 is processed so that only the drum 60 rotates counterclockwise at a higher speed than the fourth state while the stirring shaft 50 is stopped. Is supplied by the air only into the liquid surface by the second wing portion 61 of the drum 60, and the fine wave is generated by the shock wave of the second wing portion 61 larger than the shock wave of the second wing portion 61 in the fourth state. Bubbles can be generated.

The operation and stop of the first and second motors 10 and 20 are controlled by the rotational speed information received from an encoder provided in each of the first and second motors 10 and 20 and the predetermined time information set therein, And can be controlled by a computation program of a control device (not shown) provided in a possible driving device.

One; Joe, 10; A first motor, 20; Second motor, 50; Stirring shaft, 60; drum

Claims (8)

Bath (1), in which liquid is filled or flows to a certain level and the stomach is open,
Is rotatably supported on one side wall of the tank (1), the other side is opened to allow the liquid in the tank (1) to enter and exit, and half in the vertical direction is disposed on the liquid surface of the tank (1) Drum 60,
Both ends are rotatably supported by the drum 60 to penetrate the drum 60, 50,
A first motor 10 for rotating the rotating shaft 11 coupled to one end of the stirring shaft 50 in a clockwise direction, and
The rotating shaft 21 is coupled to the stator 13 or the case 12 of the first motor 10 to rotate the stator 13 or the case 12 of the first motor 10 in a counterclockwise direction. It includes a second motor 20 for rotating the drum 60 coupled to the stator 13 or the case 12 of the first motor 10 in a counterclockwise direction,
The outer circumferential surface of the stirring shaft 50 is provided with a plurality of first blades 51 convexly convex in the counterclockwise direction with the same phase difference,
The inner circumferential surface of the drum 60 faces radially with each of the plurality of first wings 51, but is convex in a clockwise direction at a predetermined interval from the radial direction with each of the plurality of first wings 51. The plurality of second wings 61, which are the same number as the plurality of first wings 51, are provided as the plurality of second wings 61 that are bent.
The stator 13 or case 12 of the first motor 10 is fixed to the rotation shaft 21 of the second motor 20 so that the center axes of these rotation shafts 11 and 21 are coaxial. Bubble generation device, characterized in that the first and second motors (10, 20) are coupled in series. The method of claim 1,
The first motor and the second motor are provided with a stopper 25 for stopping rotation of the rotating shaft when the motor is stopped,
A motor which is operated later among the first and second motors rotates the rotation shaft in the forward and reverse directions,
The stopper 25 of the first and second motor If the power is not supplied to the motor, the rotation shaft of the motor is grasped to prevent the rotation shaft from rotating, and when the power is supplied to the motor, the noise of the rotation shaft of the motor is released so that the rotation shaft becomes free to rotate. Bubble generator. The method of claim 2,
The later-driven motor of the first and second motors is bubble generation, characterized in that the rotating shaft is set to have a clockwise rotation and counterclockwise rotation twice the rotational speed of the rotational shaft of the motor initially driven Device. 4. The method according to any one of claims 1 to 3,
Each of the plurality of first wings 51 extends over the entire length of the stirring shaft 50 in the longitudinal direction and extends radially outwardly, and each of the plurality of second wings 61 is the drum 60. Extends in the longitudinal length of and extends radially inwardly,
Each of the plurality of first wing parts 51 is provided with a plurality of through holes 51a penetrating in a thickness direction at a predetermined interval along at least one of a longitudinal direction and a width direction of the first wing part 51. Is formed, and each of the plurality of second wing portions 61 is a plurality of penetrating in the thickness direction at regular intervals along at least one of the longitudinal direction and the width direction of the second wing portion 61. Bubble generating device characterized in that the through-hole (61a) is formed. The method of claim 4, wherein
Each of the plurality of through holes 51a is narrowed in diameter from the clockwise upstream to the downstream to form a funnel. The bubble generating device characterized in that the narrowed and the funnel as a whole. 4. The method according to any one of claims 1 to 3,
One end of the stirring shaft (50), the bubble generating device, characterized in that rotatably supported by a crisscross bracket (2) provided on the other side of the drum (60). 4. The method according to any one of claims 1 to 3,
The stator 13 or case 12 of the first motor 10 is coupled to the drum 60 via a bracket 62,
The bracket (62) is bubble generation device, characterized in that rotatably penetrates through one side wall of the jaw (1). 4. The method according to any one of claims 1 to 3,
The first and second motors 10 and 20 are stator 13 and 23 which are internally fixed to the cases 12 and 22, and are internally disposed with a predetermined gap with respect to the stator 13 and 23, respectively. Rotors (14, 24), the rotor (14, 24) comprises a rotary shaft (11, 21) fixed in internally,
The stator 23 or the case 22 of the second motor 20 is fixed to the base 40, characterized in that the bubble generating device.

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