KR101962903B1 - micro bubble generator - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microbubble generator, and more particularly, to a microbubble generator capable of generating microbubbles in an optimized size in water and distributing the generated microbubbles widely. According to an embodiment of the present invention, there is provided a motor comprising: a motor (100) disposed in the atmosphere and having an output shaft (110); An inlet means (200) connected to the output shaft (110) and rotated; A hollow connecting pipe 300 having an upper end coupled to the inlet means 200 and rotating, and a lower end extending into the water; And an impeller part (400) connected to the lower end of the coupling pipe (300) and having an impeller hole (410) rotating and having a lower end into which water flows, the impeller hole (410) And the inner cross-sectional area of the coupling pipe 300 is 1: 0.01 to 1: 0.8.

Description

[0001] The present invention relates to a micro bubble generator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microbubble generator, and more particularly, to a microbubble generator capable of generating microbubbles in an optimized size in water and distributing the generated microbubbles widely.

Generally, a bubble generator generates artificial microbubbles and supplies bubbles to the water to increase the amount of dissolved oxygen. Such a micro-bubble generating device has recently been applied in various fields such as a sewage treatment plant, a crop cultivation system, a bathtub system, a medical device and the like and is being prepared to be applied in the future. Micro-bubbles are being used in various fields such as massage effect, The demand for bubble generator is gradually increasing for home use as well.

As shown in FIG. 1, the pump 10 'is installed so as to be submerged below the water surface and sucks and pressurizes the water through the suction port 40', and then forcibly feeds the water to the discharge port 50 ' The external air connection pipe 70 'is connected to the discharge pipe 60' in a direction substantially perpendicular to the discharge pipe 60 ', and the external air connection pipe 70' is connected to the discharge pipe 60 ' The impeller 20 'rotates and sucks the water 30' in the water tank through the pump suction port 40 'to be discharged to the discharge pipe 60' by moving the pump 10 ' Water is sprayed through.

However, the conventional bubble generator as described above can not control the size of generated bubbles, and thus it is not possible to generate bubbles optimized for purifying contaminated air.

In addition, the conventional bubble generator sucks air through the pump suction port 40 'and blows bubbles into the discharge pipe 60', which has a problem that the mixing ratio of water and air is low.

Korean Registered Patent No. 10-72569 (October 10, 2011)

BRIEF SUMMARY OF THE INVENTION The present invention is directed to a microbubble generator capable of producing bubbles optimized for purifying contaminated air and improving the mixing ratio of water and air.

It is another object of the present invention to provide a fine bubble generator capable of widely distributing fine bubbles discharged through an impeller.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The present invention provides an apparatus for generating micro-bubbles.

According to an embodiment of the present invention, there is provided a motor comprising: a motor (100) disposed in the atmosphere and having an output shaft (110); An inlet means (200) connected to the output shaft (110) and rotated; A hollow connecting pipe 300 having an upper end coupled to the inlet means 200 and rotating, and a lower end extending into the water; And an impeller part (400) connected to the lower end of the coupling pipe (300) and having an impeller hole (410) rotating and having a lower end into which water flows, the impeller hole (410) And the inner cross-sectional area of the coupling pipe 300 is 1: 0.01 to 1: 0.8.

According to one embodiment, the ratio of the area of the impeller hole 410 to the inner cross-sectional area of the coupling pipe 300 is 1: 0.75.

According to an embodiment of the present invention, the impeller 400 includes an upper plate 420 connected to a lower portion of the coupling pipe 300 and having an upper plate through hole 421 communicating with the coupling pipe 300. A lower plate 430 parallel to the upper plate 420 spaced apart from the upper plate 420 by a predetermined distance and having the impeller holes 410 formed therein; And a plurality of impeller blades 440 provided between the upper plate 420 and the lower plate 430.

According to an embodiment of the present invention, the impeller hole 410 and the upper plate through hole 421 are concentrically arranged.

According to one embodiment, the impeller vane 440 includes an impeller blade starting point P ₁ radially spaced from the center of the impeller hole 410 by a predetermined inner radius r ₁ , (P ₂ ) spaced apart from the center of the rotor 410 by a predetermined outer radius r _{2 in the} radial direction.

According to one embodiment, the impeller blade 440 is a backward vane that reduces the resistance of water during rotation.

According to one embodiment, the outer radius r ₂ is three to four times the inner radius r ₁ .

According to one embodiment, the inner radius r ₁ is 10 times the inner diameter d ₁ of the coupling tube 300.

According to one embodiment, the impeller blades starting point (P ₁₎ in the tangential (U ₁₎ and the impeller blades 440 of the circle forming the inner radius (r ₁₎ has a first predetermined angle (B ₁₎ Is formed.

The tangential line U ₂ of the circle formed by the outer radius r ₂ and the tangent line U ₂ of the impeller blade 440 form a second predetermined angle B ₂ at the impeller blade end point P ₂ , .

According to an embodiment, the first predetermined angle B ₁ and the second predetermined angle B ₂ are acute angles, and the first predetermined angle B ₁ is equal to or greater than the second predetermined angle B ₂ .

According to one embodiment, the impeller blades 530 are curved inward from the inside.

According to one embodiment, the inflow means 200 includes a cylindrical air inflow pipe 210 fixed to the output shaft 110; And a plurality of air inflow holes 220 formed on the outer circumferential surface of the air inflow pipe 210.

According to one embodiment, the inflow means 200 includes a cylindrical water inflow pipe 210 'fixed to one side of the connection pipe 300; And a plurality of water inflow holes 220 'formed on the outer circumferential surface of the water inflow pipe 210'; And a nozzle 230 'installed between the water inlet pipe 210' and the connection pipe 300.

According to an embodiment of the present invention, at least two inlet units 200 are installed along the longitudinal direction of the connection pipe 300.

According to an embodiment of the present invention, it is possible to produce air bubbles that are optimized for purifying contaminated air and improve the mixing ratio of water and air, so that the polluted air can be purified while staying in water for a relatively long time.

In addition, the fine bubbles discharged through the impeller can be widely distributed to purify a relatively wide range of contaminated air.

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an example of a bubble generating device for generating bubbles according to the prior art; FIG.
2 is an exploded perspective view of a microbubble generator according to the present invention.
3 is a perspective view of a microbubble generator according to the present invention.
4 is a cross-sectional view of an impeller according to the present invention.
5 is an explanatory view of an impeller portion according to the present invention.
6 is a perspective view showing a second embodiment of the apparatus for generating micro-bubbles according to the present invention.
7 is a perspective view showing a third embodiment of the apparatus for generating micro-bubbles according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. The shape of the elements in the figures is therefore exaggerated to emphasize a clearer description.

3 is a perspective view of an apparatus for generating micro-bubbles according to the present invention, FIG. 4 is a cross-sectional view of an impeller according to the present invention, and FIG. 5 is a cross- Fig.

2 through 5, the microbubble generator 10 may include a motor 100, an inflow unit 200, a connection pipe 300, and an impeller unit 400.

The motor 100 is disposed in the atmosphere and can rotate the output shaft 110. [ The motor 100 is not shown in a fixed state in the drawing, but may be held in a fixed state by an external fixture. Since the configuration of the fixed motor 100 is a general one, a detailed illustration and description thereof will be omitted.

The inlet means 200 may be connected to the output shaft 110. The inlet means 200 may include an air inlet pipe 210 and an air inlet hole 220.

The air inlet pipe 210 is fixed to the output shaft 110 and may be formed into a cylindrical shape. The air inlet pipe 210 may be disposed in the air. A plurality of air inflow holes 220 may be formed on the outer circumferential surface of the air inflow pipe 210. The air inflow hole 220 may be exposed to the atmosphere and air may be introduced.

The upper end of the connection pipe 300 can be coupled to the inlet means 200 and rotated. The lower end of the connection pipe 300 extends into the water and may be formed in a hollow shape. The diameter of the connecting pipe 300 may be smaller than the diameter of the air inlet pipe 210. Accordingly, the connection pipe 300 can be inserted into the air inlet pipe 210 by a predetermined length.

Referring to FIG. 4, the impeller 400 is connected to the lower end of the coupling pipe 300 and is rotatable. The impeller portion 400 may include an impeller hole 410, an upper plate 420, a lower plate 430, and an impeller blade 440.

The upper plate 420 may be connected to a lower portion of the connection pipe 300. The upper plate 420 may have an upper plate through hole 421 communicating with the connection pipe 300. The upper plate through hole 421 serves as a passage for allowing the air introduced through the air inlet hole 220 to flow in the direction of the impeller 400.

The lower plate 430 may be disposed parallel to the upper plate at a predetermined distance. The lower plate 430 may be formed with an impeller hole 410 through which water flows. The water introduced through the impeller hole 410 may be formed so as to generate bubbles with a minute size while being in contact with the air introduced through the upper plate through hole 421. The impeller hole 410 and the upper plate through hole 421 are preferably concentric with each other.

The impeller blade 440 may be provided between the upper plate 420 and the lower plate 430. A plurality of impeller blades 440 may be formed and rotated. The impeller blade 440 may be formed of a backward vane, i.e., a backward curved vane, which reduces the resistance of the water during rotation. 4 (a), the curved portion 441 may be formed so that the impeller blade 440 is curved outwardly from the inside. Accordingly, the impeller blades 440 are formed in a vertically symmetrical manner, so that the fluid resistance is small and the wind pressure is high, so that a large amount of air can be supplied at the same depth. In addition, the resistance with water can be minimized, and the rotational efficiency of the impeller blades 440 can be improved with relatively little power.

Referring to FIG. 4 (b), the impeller blade 440 may be formed vertically between the upper plate and the lower plate 430. The impeller blade 440 is arranged to extend from the impeller blade starting point P ₁ spaced apart from the center of the impeller hole 410 by a predetermined inner radius r ₁ radially from the center of the impeller hole 410, To reach the impeller blade end point P ₂ spaced apart by an outer radius r _{2 that} is predetermined by the radius r ₂ .

)The tangential line U ₁ of the circle in which the inner radius r ₁ is formed at the impeller blade starting point P ₁ and the impeller blade 440 are formed at the first predetermined angle B ₁ and the impeller blade end point P ₂₎ the outer radius (r ₂₎ tangent (U ₂₎ and impeller blades (440) of the circle that is formed is formed of a second predetermined angle (B ₂₎ in. The first predetermined angle B ₁ and the second predetermined angle B ₂ may be acute angles and the first predetermined angle B ₁ may be greater than the second predetermined angle B ₂ . (

)

The configuration of the micro-bubble generating device 10 for generating the micro-bubbles optimized for air purification as described above will be described in detail below.

Prior to the description, the meaning of the signs and the mathematical expressions shown in Fig. 5 will be described. However, redundant contents are omitted.

는 터빈효율계수이고, a는 제1 터빈계수이고, b는 제2 터빈계수이고,

는 반응조 수심계수이고,

는 물의 밀도이고, d₁는 공기 유입관(210) 직경이고, d₂는 임펠러공(410) 직경이고, t는 임펠러 날개(440) 두께(m)이고, h는 임펠러 날개(440) 높이(m)이고, n는 임펠러 날개(440)의 수이다.)(Wherein, Q (m ³ / s) is jaheup air amount,

Is a turbine efficiency coefficient, a is a first turbine coefficient, b is a second turbine coefficient,

Is the reactor water depth coefficient,

Is the density of water, d ₁ is the air inlet pipe 210 in diameter and, d ₂ is the impeller hole 410 diameter, t is the impeller blades 440 Thickness (m), h is the impeller blade 440 height ( m), and n is the number of impeller blades 440.)

The turbine effective coefficient according to the prior art is less than 0.1. However, from the data obtained by the experiment using the micro-bubble generating device to which the present invention is applied, the maximum value of the turbine effective coefficient derived from the above equation reaches 0.35. That is, from the above results, the improved effective coefficient of the turbine in the micro-bubble generating device to which the present invention is applied can minimize resistance to water and increase the wind pressure.

Details of such experiments are as follows.

Table 1 is the experimental condition for deriving the optimum micro-bubble size.

The experimental table based on the above experimental conditions is shown below (see Table 2). Experimental results show that the ratio of the area of the impeller hole 410 to the inner cross-sectional area of the coupling pipe 300 is 1: 0.75 when the gas and liquid contact area has a maximum value (78,994,286 m ² ). Accordingly, it was confirmed that the ratio of the area of the optimum impeller hole 410, which maximizes the contact area between water and air, and the internal cross-sectional area of the coupling pipe 300 is 1: 0.75 in order to purify contaminated air in the water .

That is, when the ratio of the area of the impeller hole 410 to the cross-sectional area of the connecting pipe 300 is 1: 0.75, the minute bubbles generated from the impeller 400 have a size of 35 um having, in contact with the polluted air in the area of the 78,994,286m ² in depth 1m, to purify the contaminated air.

In addition, the experimental table which tests the ratio of the time to stay in water and the contact area of water with air according to the size of the minute bubbles is as follows (see Table 3). As a result of the experiment below, the size optimized for purifying contaminated air for the longest stay of microbubbles in water is shown as 35 μm. That is, since the minute bubbles having a size of 35 um must be formed, the ratio of the area of the impeller hole 410 to the internal cross-sectional area of the coupling pipe 300 is 1: 0.75.

Thus, the micro-bubble generated in the impeller portion 400 has a size of 35um, and stay for 40.0hr at depths 1m, into contact with the polluted air in the area of the 78,994,286m ^2, to purify the contaminated air.

As a result of the experiment, it is preferable that the ratio of the area of the impeller hole 410 to the internal cross-sectional area of the coupling pipe 300 is 1: 0.75 in order to derive the effective number of turbines 0.35. Further, in order to derive the above result, it is preferable that the following mathematical expression derived from a plurality of experiments is applied. (See Equations 2 to 4)

It is preferable that the outer radius r ₂ is formed to be three to four times the inner radius r ₁ . However, it is not necessarily limited thereto.

Further, the inner radius r ₁ may be formed to be ten times the inner diameter d ₁ of the connection pipe 300. However, the present invention is not limited to this, and the inner radius r ₁ may be formed to be 2 to 20 times the inner diameter d ₁ of the connection pipe 300.

6 is a perspective view showing a second embodiment of the apparatus for generating micro-bubbles according to the present invention.

Referring to FIG. 6, the inflow means 200 'may be installed in water. Accordingly, water may be introduced into the water inflow hole 220 '.

7 is a perspective view showing a third embodiment of the apparatus for generating micro-bubbles according to the present invention. Referring to FIG. 7, a plurality of inflow means 200 'may be installed in the water 200', 200 ', 200' ''. Thus, the installed inflow means 200 'can control the size of the fine bubbles. That is, the size of the bubbles can be adjusted by adjusting the number of the water inflow holes 220 'through which the water passes.

The nozzle 230 'may be disposed between the water inlet pipe 210' and the connection pipe 300. The nozzle 230 'may be a vortex nozzle 230' in which water flowing through the water inflow hole 220 'is vortexed. The nozzle 230 'may be installed on the upper end of the connection pipe 300 with a latching protrusion 231' formed at the upper end thereof. Water flowing through the water inlet pipe 210 'passes through the nozzle 230' and can form a swirl. Accordingly, the mixing ratio of the water introduced from the impeller hole 410 and the water introduced from the water inlet hole 220 'can be improved. Air and water with improved mixing ratio can be miniaturized in the process of passing through the impeller part 400 to generate micro bubbles.

The foregoing detailed description is illustrative of the present invention. In addition, the foregoing is intended to illustrate and explain the preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, it is possible to make changes or modifications within the scope of the concept of the invention disclosed in this specification, within the scope of the disclosure, and / or within the skill and knowledge of the art. The above-described embodiments illustrate the best mode for carrying out the technical idea of the present invention, and various modifications required for specific application fields and uses of the present invention are also possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. In addition, the appended claims should be construed to include other embodiments.

10: Micro bubble generator
100: motor
110: Output shaft
200: inlet means
210: air inlet pipe
220: Air inflow ball
200 ': inlet means
210 ': water inlet pipe
220 ': air inlet pipe
230 ': nozzle
231 ': hanging jaw
300: connector
400: impeller portion
410: impeller ball
420: top plate
421: Through plate through-hole
430: lower plate
440: impeller blade
441:

Claims (14)

A motor (100) disposed in the atmosphere and having an output shaft (110);
An inlet means (200) connected to the output shaft (110) and rotated;
A hollow connecting pipe 300 having an upper end coupled to the inlet means 200 and rotating, and a lower end extending into the water; And
An impeller part 400 connected to the lower end of the connection pipe 300 and rotating and having an impeller hole 410 through which water flows into the lower end thereof;
Wherein the micro bubble generating device comprises:
The ratio of the area of the impeller hole (410) to the internal cross-sectional area of the coupling pipe (300) is 1: 0.01 to 1: 0.8,
The inflow means (200)
A cylindrical water inlet pipe 210 'fixed to one side of the connection pipe 300;
A plurality of water inflow holes 220 'formed on the outer circumferential surface of the water inflow pipe 210'; And
A nozzle 230 'installed between the water inlet pipe 210' and the connection pipe 300;
Wherein the micro bubble generating device comprises:
The method according to claim 1,
Wherein a ratio of an area of the impeller hole (410) to an internal cross-sectional area of the coupling pipe (300) is 1: 0.75.
The method according to claim 1,
The impeller unit 400 includes:
An upper plate 420 connected to a lower portion of the connection pipe 300 and having an upper plate through hole 421 communicating with the connection pipe 300;
A lower plate 430 parallel to the upper plate 420 spaced apart from the upper plate 420 by a predetermined distance and having the impeller holes 410 formed therein; And
A plurality of impeller blades 440 provided between the upper plate 420 and the lower plate 430;
Wherein the micro bubble generating device comprises:
The method of claim 3,
Wherein the impeller hole (410) and the upper plate through hole (421) are arranged concentrically.
5. The method of claim 4,
The impeller blade (440)
From an impeller blade starting point P ₁ spaced from the center of the impeller hole 410 by a predetermined inner radius r _{1 in the} radial direction,
Micro-bubble generator, characterized in that the impeller blades extending to reach the end point (P ₂₎ separated by an outer radius (r _2), a predetermined radial direction from the center of the impeller ball 410. The
6. The method of claim 5,
The impeller blade (440)
Is a backward vane that reduces the resistance of water during rotation.
The method according to claim 6,
Wherein the outer radius r ₂ is three to four times the inner radius r ₁ .
The method according to claim 6,
Wherein the tangential line U ₁ of the circle formed by the inner radius r ₁ and the impeller blade 440 form a first predetermined angle B ₁ at the impeller blade starting point P ₁ The micro bubble generator.
9. The method of claim 8,
Wherein a tangent line U ₂ of the circle formed by the outer radius r ₂ and the impeller blade 440 form a second predetermined angle B ₂ at the impeller blade end point P ₂ Fine bubble generator.
10. The method of claim 9,
The first predetermined angle B ₁ and the second predetermined angle B ₂ form an acute angle,
Wherein the first predetermined angle (B ₁ ) is greater than the second predetermined angle (B ₂ ).
6. The method of claim 5,
The impeller blades 530 may be formed,
And a shape curved inward from the inside.
The method according to claim 1,
The inflow means (200)
A cylindrical air inlet pipe 210 fixed to the output shaft 110; And
A plurality of air inflow holes 220 formed on the outer circumferential surface of the air inflow pipe 210;
Wherein the micro bubble generating device comprises:
delete The method according to claim 1,
The inflow means (200)
Wherein at least two or more of the plurality of micro-bubbles are installed along the longitudinal direction of the coupling pipe (300).

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