KR101708597B1 - Apparatus for generating nanobuble - Google Patents

Abstract

A nanobubble generating apparatus is disclosed. This nanobubble generating apparatus includes: a casing section where a water inlet and a water outlet are formed; a main shaft placed in a longitudinal direction in the casing section and rotating when power is transmitted from the outside; an inducer impeller performing primary breaking on bubbles included in water while generating a vortex by rotating in response to the rotation of the main shaft; a turbo impeller performing secondary breaking on the bubbles included in the water while increasing the magnitude of the vortex by rotating in response to the rotation of the main shaft at a rear end of the inducer impeller; a middle rotor performing tertiary breaking on the bubbles included in the water while increasing the magnitude of the vortex by rotating in response to the rotation of the main shaft at a rear end of the turbo impeller; a low rotor performing quaternary breaking on the bubbles included in the water while increasing the magnitude of the vortex by rotating in response to the rotation of the main shaft at a rear end of the middle rotor; and a closed impeller sending the water including the bubbles subjected to the quaternary breaking by the low rotor to the water outlet side by rotating in response to the rotation of the main shaft at a rear end of the low rotor.

Description

[0001] APPARATUS FOR GENERATING NANOBUBLE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nano bubble generating device, and more particularly, to a nano bubble generating device that significantly reduces raw water BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), SS The present invention relates to a nano bubble generator capable of generating ultrafine nano bubbles and supplying the nano bubbles to raw water to remove contaminants contained in raw water.

Micro-bubbles purify water quality by using biological activation effect, physical chopping effect, droplet effect, etc. and are applied to various fields such as hydroponic cultivation, fish culture, washing / washing, medical treatment, bathing facility or washing machine. Therefore, studies for efficiently generating such minute bubbles have been continuing, and devices for generating nano bubbles, which are ultrafine bubbles in micro bubbles, have been continuously developed and developed have.

Various types of pumps have been used as essential components in apparatus and equipment for micro-bubble generation. Typical examples include centrifugal pumps, rotary pumps, and regeneration pumps. Centrifugal pumps are centrifugal pumps that apply pressure energy to water by the centrifugal force generated by rotation of the impeller, and are also referred to as vortex pumps. A rotary pump is also called a rotary pump. It is a pump that transports fluid by movement of a closed space caused by rotation of a rotor which is in contact with a casing so that there is almost no gap in the casing. A vane pump equipped with a flat plate vane of a rotor, a gear pump provided with a cogwheel, and a screw pump provided with a screw. In the case of a rotary pump, unlike a centrifugal pump, which does not require a suction valve and a discharge valve, and which imparts a momentum to the fluid, the fluctuation of the amount of discharge is small because the moving part rotates at a constant speed. The range of use is relatively wide from low-viscosity to fixed, but liquids suspended in suspended solids are not suitable due to the risk of abrasion. Special care is required when handling corrosive liquids. do. The regenerative pump is also called a friction pump, a Wesco pump, etc. In the case of rotating a large number of grooves around the impeller, liquid that enters the grooves at the inlet side is conveyed out of the delivery port surrounded by the casing . The regeneration pump uses the viscous force of the fluid to discharge the pressure energy by the liquid frictional force of the liquid by rotating the rotating shaft with the smooth rotating body or the screw in the casing. The regeneration pump has an intermediate structure between the centrifugal pump and the rotary pump, and a high lift is obtained compared with the centrifugal pump, but the maximum efficiency is low. In addition, the efficiency of water is as low as 30% to 40%, because the turbulence of the liquid in the flow path becomes severe and the shock or friction occurs in the gap between the rotor groove and the wall. This is an inevitable limitation because the regeneration pump utilizes friction. In using such various pumps, it is inevitable that cavitation damage due to an air pocket phenomenon generated at the front end of the pump or a sudden pressure difference is inevitable when gas is injected together to generate bubbles.

As a method for generating fine bubbles or ultrafine bubbles, as disclosed in Korean Patent No. 10-1379239 (Registered on March 23, 2014) or No. 10-1125851 (Registered Mar. 05, 2012) A technique has been disclosed in which spiral blades and spiral grooves are used, spiral groove flow paths are formed on the outer circumferential surface of a cylindrical body, and a cylindrical body is rotated by a motor to generate nano bubbles. However, the above-mentioned prior arts require a separate transfer pump for transferring the fluid, besides the addition of facilities for providing a compressor or a pressure, and it is difficult to ensure the efficiency of generation of nano-scale ultra-fine bubbles .

In addition, as shown in FIG. 1, a conventional technology has been disclosed in which water and gas are mixed and fine bubbles are generated by using components such as a pressure pump and a static mixer. However, A separate pressurizing pump and a static mixer are required. In particular, a foreign matter is adhered to the static mixer, which shortens the service life of the device and lowers the bubble generation efficiency.

Korean Registered Patent No. 10-1379239 (Registered on March 23, 2014) Korean Registered Patent No. 10-1125851 (registered on March 5, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a nano bubble generator capable of increasing bubble generation efficiency and generating ultrafine nano bubbles without requiring complicated additional equipment such as a compressor or a pressurizing pump.

The nano bubble generating apparatus according to one aspect of the present invention includes a casing unit (C1, C2, C3) having a water inlet (113) and a water outlet (114) An inducer impeller 102 for first crushing bubbles contained in water while rotating in accordance with rotation of the main shaft to generate a vortex; A turbo impeller 103 for secondarily crushing the bubbles contained in the water while rotating the main shaft at a rear end of the inducer impeller to increase the strength of the vortex, A middle rotor 105 for three-dimensionally crushing bubbles contained in the water while rotating in accordance with the rotation to increase the strength of the vortex; A low rotor 107 for crushing the bubbles contained in the water in a fourth order while rotating the main shaft to increase the strength of the vortex, and a second rotor 108, which rotates in accordance with the rotation of the main shaft at the rear end of the low rotor, And a closed impeller (110) for discharging water containing bubbles to the water outlet side.

According to an embodiment, the nano bubble generator may provide frictional resistance to water rotating by the turbo impeller at a rear end of the turbo impeller to facilitate the secondary pulverization by the turbo impeller, A stator vane (104) for passing water containing pulverized air bubbles, a stator vane (104) passing between the middle rotor and the low rotor for providing water with a friction resistance against water rotating by the middle rotor, A middle stator 106 for accelerating the pulverization of the pulverized coal and passing water containing the above-mentioned third pulverized bubbles, a frictional resistance against water rotating between the low rotor and the closed impeller, To promote the quaternary pulverization by the low rotor and to pass water containing the quaternary pulverized bubble, (1081) is formed on the inner surface of the lower rotor (107) to promote the fourth-order pulverization by the lower rotor (109), and is disposed between the middle stator and the low stator A spacer stator 108 is formed.

According to one embodiment, the casing portions (C1, C2, C3) include a top cover (C1) in which the water inlet is formed and accommodates therein the inducer impeller and the turbo impeller, A bolt cover (C2) coupled to the top cover with a first o-ring (R1) interposed therebetween for receiving the stator vane, the middle rotor and the low rotor; And a volute body (C3) coupled to the volute cover and receiving the closed impeller with a second o-ring (R2) interposed therebetween.

According to one embodiment, the top cover (C1) is formed to be directed from the inner side of the top cover toward the turbo impeller, so that when the turbo impeller rotates, the bubbles And includes a plurality of protrusions 121 for promoting the secondary pulverization.

According to one embodiment, the closed impeller 110 includes an opening 1104 for introducing water into the inside, a plurality of rotating blades 1103 for rotating the water flowing through the opening, And side passages 110 for discharging water, which is rotated by the wings, toward the water outlet 114 side.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a nano bubble generator according to an embodiment of the present invention; FIG. 2 is a block diagram of a nano bubble generator according to an embodiment of the present invention; It is possible to prevent the shortening of the service life.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention provides a nano bubble generator which is capable of significantly reducing the raw water BOD (Biochemical OxygenDemand), COD (Chemical Oxygen Demand), SS (suspended solid), and N-Hex It is possible to generate fine nano bubbles and supply them to the raw water to remove contaminants contained in the raw water.

1 is a view for explaining an example of a conventional nano bubble generator,
2 is a schematic view illustrating an application example of the nano bubble generator 100 according to an embodiment of the present invention,
3 and 4 are views showing the appearance of the nano bubble generator 100 according to an embodiment of the present invention,
5 is a cross-sectional view taken along line AA in the nano bubble generator 100 of FIG. 4,
6 is a view showing an example of a venturi pipe arranged in the water inlet 113 in the nano bubble generator 100 according to the embodiment of the present invention to introduce gas into the water inlet 113,
7 is a view showing a part of the casing units C1, C2 and C3 removed to explain the flow of water in the nano bubble generator 100 according to the embodiment of the present invention,
8 is an exploded perspective view of a nano bubble generator 100 according to an embodiment of the present invention and includes a main shaft 101 (shown in FIG. (Shown in (a)) that does not rotate even when the rotor is rotating, and Fig.
9 shows details of the components (FIG. 8 (b)) rotating together with the main shaft 101 depending on the main shaft 101 in the nano bubble generator 100 of FIG. 8,
FIG. 10 is a detailed view of an example of the closed impeller 110 in FIG. 9,
11 and 12 are cross-sectional views of important parts for explaining the coupling relation between the components of the nano bubble generator 100 of the present invention,
13 is a graph for explaining the bubble generation efficiency of the nano bubble generator 100 according to the present invention. The particle distribution (red, G2) of the conventional bubble generator and the particle distribution (blue, 0.0 > G1 < / RTI >

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the drawings and embodiments described with reference to the accompanying drawings are intended to be illustrative and simplified for those of ordinary skill in the art to which the present invention pertains. Nano bubbles are used herein to mean bubbles having a diameter of 1 m or less.

FIG. 2 is a schematic view of an application example of the nano bubble generator 100 according to an embodiment of the present invention. Referring to FIG. Referring to FIG. 2, the nano bubble generator 100 receives raw water, that is, water 350 from the water tank 300 to generate ultra-fine bubbles of nano-size, To the water tub 300 side. The water purifying agent present in the water 350 in the water tank 300 floats up by the nano bubbles generated by the nano bubble generator 100 and supplied into the water tank 300, The nano bubble generator 100 is connected to the motor 200 and the belt 250 so that the nano bubble generator 100 flows water 350 from the water tank 300 through the water inlet (arrow A1 (IN)), (Arrow A2 (OUT)) to the water tub 300 side. 2, nano bubbles are supplied back to the water tank 300 using the water 350 in the water tank 300 as raw water. Alternatively, raw water may be supplied to generate nano bubbles, .

3 and 4 are views showing an appearance of a nano bubble generator 100 according to an embodiment of the present invention. Particularly, Fig. 3 is a view showing the appearance of the entire casing parts C1, C2, C3 in the longitudinal direction And FIG. 4 is a view of the nano bubble generator 100 viewed from the right side of FIG. 3, that is, the side of the top cover C1. 3 and 4, the nano bubble generator 100 includes a casing unit C1, C2, and C3, and a water inlet 113 (not shown) along the longitudinal direction of the casing units C1, And a main shaft 101 mounted inside the casing units C1, C2, C3 so as to pass through the other end where the water outlet 114 is located. One end of the main shaft 101 is coupled to the top cover C1 side and the other end of the main shaft 101 is provided with a pulley 112 for receiving power from the motor through the belt have. The casing portions C1, C2 and C3 are divided into a top cover C1, a volute cover C2 and a volute body C3. The water inlet 113 is formed on the top cover side And the water outlet 114 is formed on the side of the bolus body C3. And is covered with a cover chamber 115 for watertightness between the main shaft 101 and the bolus body C3. Since the main shaft 101 has to rotate in a state where the casing portions C1, C2 and C3 are fixed, the main shaft 101 can rotate independently by using bearings (B1, B2, B3 in Fig. 5) (C1, C2, C3). The coupling relationship between the top cover C1, the bolus cover C2 and the bolus body C3 in the casing portions C1, C2, and C3 will be described in detail below with reference to Fig.

FIG. 5 is a cross-sectional view taken along AA in the nano bubble generator 100 of FIG. 4. FIG. 6 is a cross-sectional view of the nano bubble generator 100 according to the embodiment of the present invention, FIG. 7 is a view showing an example of a venturi pipe for introducing gas into the casing parts C1, C2 to explain the flow of water in the nano bubble generator 100 according to the embodiment of the present invention. C2, and C3. FIG. 8 is an exploded perspective view of a nano bubble generator 100 according to an embodiment of the present invention. Referring to FIG. 8, (shown in FIG. 9 (b)) and components (not shown) that are not rotated together with the main shaft 101 even when the main shaft 101 rotates. FIG. 9 is an exploded perspective view In the nano bubble generator 100 of FIG. 8, Fig. 10 is a detailed view of an example of the closed impeller 110 in Fig. 9, and Figs. 11 and 12 are views showing in detail the components (Fig. 8 (b)) rotating together with the main shaft 101, FIG. 12 is a cross-sectional view of an important part for explaining a coupling relation between the components of the nano bubble generator 100 of the present invention. Fig. 12 (a) is a cross-sectional view of the water inlet 113, Fig. 12 (b) is a cross section of the turbine impeller 103, (D) is a cross-sectional view of the low stator 109 as an EE section, and FIG. 10 (e) is a sectional view of the rotor 101, And the lute body (C3).

5 to 9, a nano bubble generator 100 according to an embodiment of the present invention will be described in detail. The nano bubble generator 100 according to an embodiment of the present invention includes casing parts C1, C2 and C3, a main shaft 101, an inducer impeller 102, a turbo impeller, A rotor 103, stator vanes 104, a middle rotor 105, a low rotor 107, and a closed impeller 110. It also includes a middle stator 106, a space stator 108, and a low stator 109.

The casing portions C1, C2 and C3 are provided with a water inlet 113 and a water outlet 114 on the outside and various components fixed or rotatably connected to the main shaft 101 are accommodated therein And provides a water outflow path through which water can be introduced into the water tank (300 in FIG. 2) by generating water containing nano bubbles. The casing portions C1, C2, and C3 may be divided into a top cover C1, a bolt cover C2, and a bolus body C3 as briefly described above.

A water inlet 113 is formed in the top cover C1 and an inducer impeller 102 and a turbo impeller 103 are accommodated in the top cover C1. The top cover C1 is formed so as to face from the inner surface of the top cover C1 to the turbo impeller 103 side as indicated by reference numeral 121 in Fig. 8, so that when the turbo impeller 103 rotates, And a plurality of protrusions 121 for allowing the second crushing operation of the bubbles contained in the water to be further promoted by the interaction with the second crusher 103. As shown in FIGS. 9 and 12 (b), the plurality of protrusions 121 are formed to have a certain length and to have a smaller width toward the end portion. Thus, the turbulent flow generated by the turbo impeller 103 is struck so that secondary pulverization of the bubbles contained in the water can be performed well.

The bolt cover C2 is coupled to the top cover C1 with the first O-ring R1 interposed therebetween in order to prevent leakage of water. The stator vane 104, the middle rotor 105, (107). In addition, the middle stator 106, the space stator 108, and the low stator 109 are accommodated in the inside of the bolt cover C2.

A water outlet 114 is formed in the volute body C3 and is coupled to the bolus cover C2 with the second O-ring R2 interposed therebetween in order to prevent leakage of water. The closed impeller 110 is accommodated. The mutual coupling between the top cover C1, the bolus cover C2 and the bolus body C3 is such that one end of the top cover C1 and the bolus cover C2 are abutted with each other, The outside of a part of the bolus cover C2 can be seen between the bolt cover C2 and the bolus body C3 by using the screws through the first O- The lute body C3 may be covered and the water may be prevented from leaking through the second O-ring R2 therebetween. However, the present invention is not limited thereto.

6, venturi pipes 1131 and 1132 are provided at the water inlet 113 formed in the top cover C1 of the casing units C1, C2, and C3, (gas) can be introduced. According to the characteristics of the venturi pipe, a gas can be injected into the gas inlet pipe 1132 by a pressure difference when water flows into the water passage 1131 (in the direction of the arrow in FIG. 6). Oxygen or active oxygen (OH radical) may be used as the gas to be introduced together with water, but the present invention is not limited to this example, and depending on the kind of raw water in the water tank 300, Various types of gases can be used.

The main shaft 101 is arranged in the longitudinal direction so as to pass through the outflow end in which the water outlet 114 is formed, starting from the inlet end in which the water inlet 113 is formed along the outflow path of the water in the casing portions C1, do. The main shaft 101 receives power from an externally located motor (200 of FIG. 2) and rotates to rotate the components fixed to the main shaft 101. The components that rotate depending on the rotation of the main shaft 101 are an inducer impeller 102, a turbo impeller 103, a middle rotor 105, a low rotor 107, and a closed impeller 110. The components connected to the main shaft 101 but not rotated by the bearings B1, B2 and B3 are the top cover C1, the stator vane 104 and the bolus body C3. Components that are fixed to the casing portions C1, C2, and C3 through the main shaft 101 are the middle stator 106, the space stator 108, and the low stator 109.

The main shaft 101 is provided with a pulley 112 for receiving power from a motor (200 in FIG. 2) through a belt and performing rotational motion. The nano bubble generator 100 is configured such that the main shaft 101 and the casing portions C1, C2, C3, and C3 are out of the casing portions C1, C2, And further includes a mechanical seal 111 and a cover seal 115 for water tightness with the bolt body C3.

The inducer impeller 102 is a component that is fixed to the main shaft 101 and rotates together as the main shaft 101 rotates. As shown in the figure, the inducer impeller 102 is formed in a spiral shape so that water flowing through the water inlet 113 is rotated to generate a vortex, and at the same time, water flowing into the water inlet 113 through the water inlet 113 It serves to first crush the contained bubbles. In addition, as mentioned briefly above, it is possible to suppress the occurrence of air pockets, which often occurs when the gas enters the water inflow end. That is, generation of air pockets can be suppressed because strong vortex is generated through the wings of the helical inducer impeller 102. In addition, the generation of vortex due to the rotating blades of the helical formed inducer impeller 102 also reduces cavitation damage caused by a sudden pressure difference, thereby reducing damage to the rotating blades of the inducer impeller 102 .

The turbo impeller 103 is positioned at the rear end of the inducer impeller 102 and rotates together with the rotation of the main shaft 101 to further increase the strength of the vortex generated by the inducer impeller 103 do. At the same time, it serves to crush the bubbles firstly pulverized by the inducer impeller 102 and mixed in the water. The size of the bubbles secondarily crushed by the turbo impeller 103 becomes smaller than the bubbles after the primary crushing by the inducer impeller 102. The wings of the turbo impeller 103 are formed by turning a plurality of blades on one plate, as shown in FIG. 8 or 9, in particular, as shown in FIG. 8 or 9. A plurality of stator vanes 104 positioned at the rear end of the turbo impeller 103 and a plurality of stator vanes 104 formed around the turbo impeller 103, that is, the inner surface of the top cover C1, The turbine impeller 103 breaks up the bubbles contained in the water finely by the action of the stator vane 104 and the plurality of protrusions 121. [

The middle rotor 105 is positioned at the rear end of the turbo impeller 103 and rotates together with the rotation of the main shaft 101 to further increase the strength of the vortex and to crush the bubbles contained in the water for the third time .

The low rotor 107 rotates in accordance with the rotation of the main shaft 101 at the rear end of the middle rotor 105 to increase the strength of the vortex and to crush the bubbles contained in the water for the fourth time. The middle rotor 105 and the low rotor 107 include a plurality of blades and each of the plurality of blades is inclined at a predetermined angle with respect to the longitudinal direction of the main shaft 101, ) Direction of the water flow.

The closed impeller 110 rotates in accordance with the rotation of the main shaft 101 at the rear end of the low rotor 107 to finally supply the water containing the bubbles fourtharily crushed by the low rotor 107 to the water outlet 114. [ As shown in FIG. 10, the closed impeller 110 includes an opening 1104 for introducing water into the inside thereof, a plurality of rotating blades 1103 for rotating water flowing through the opening 1104, And side passages 110 for discharging the water rotated by the wings 1103 toward the water outlet 114 side. 10, the opening 1104 is formed in the direction f1 in which the water flows in the closed impeller 110, but the opposite direction f2 does not include the portion coupled to the main shaft 101 It is a form that is blocked.

11 and 12, the coupling relationship between the closed impeller 110 and the bolus body C3 is determined by the side passages (not shown) of the closed impeller 110, The water discharged from the water outlet 110 moves along the spiral flow path 131 formed in the volute body C3 and finally discharged to the water outlet 114 side. Therefore, the closed impeller 110 functions to provide a strong centrifugal force so that the water containing the nano bubbles can be smoothly discharged to the water tank through the water outlet 114.

The nano bubble generator 100 includes an inducer impeller 102, a turbo impeller 103, a middle rotor 105, a low rotor 107, which are fixed to the main shaft 101 and rotate together. And a stator vane 104, a middle stator 106, a low stator 109, and a space stator 108 as components for promoting the bubble breakage by the closed impeller 110. [ These components will be described with reference to Figs. 5 and 8. Fig.

First, the stator vane 104 is disposed at the rear end of the turbo impeller 103 so as to generate frictional resistance against water rotating by the turbo impeller 103, and thereby the secondary pulverization of the bubbles by the turbo impeller 103 And passes water containing secondary crushed bubbles. As shown in Fig. 8, the stator vane 104 is provided with a plurality of friction plates 1041 in the form of a spinning wheel around the stator vane 104, and a water containing secondarily crushed bubbles between the friction plates 1041 Passages 1042 are formed so as to be able to proceed. Therefore, the turbo impeller 103, the stator vane 104, and the plurality of protrusions 121 located inside the top cover C1 cooperate with each other in the secondary pulverization of the bubbles. Since the plurality of projections 121 and the stator vanes 104 serve as resistance elements in the vortex intensity direction, the strength of the vortex can be slightly reduced due to these configurations. This is because the middle rotor 105, The low rotor 107 and the like.

The middle stator 106 is located between the middle rotor 105 and the low rotor 107 and provides a frictional resistance against water rotating by the middle rotor 105, Further promoting the pulverization of the tea, and passing the water including the third-order pulverized bubbles to the rear end. In the middle stator 106, a plurality of passages 1061 are formed radially as shown in Fig.

The low stator 109 is positioned between the low rotor 107 and the closed impeller 110 and provides a frictional resistance against water rotating by the low rotor 107 so that the fourth rotor of the low rotor 107 Further promoting the pulverization, and passing the water containing the third pulverized bubble to the rear end.

The spacer stator 108 is disposed outside the low rotor 107 between the middle stator 106 and the low stator 109. A concavo-convex pattern 1081 is further formed on the inner surface of the spacer stator 108 to further promote fourth-order pulverization of the bubbles by the low rotor 107.

In the present specification, the primary pulverization, secondary pulverization, tertiary pulverization and quaternary pulverization of bubbles are used as terms for distinguishing the pulverization process by the respective components, Thus, in general, it may be in the order of primary grinding> secondary grinding> tertiary grinding> fourth grinding.

Reference numeral 122, which is not shown in FIG. 9, is a top cover fixing portion 122 for fixing the top cover C1, as shown in FIG. 5, between the top cover fixing portion 122 and the main shaft 101 The first bearing B1 is interposed and the main shaft 101 can rotate within the top cover C1. Reference numeral 123 denotes a stator vane fixing portion 122 for fixing the stator vane 104. The stator vane fixing portion 122 includes a second bearing B2 between the stator vane 104 and the main shaft 101, So that the main shaft 101 can be rotated in the stator vane 104. [ Reference numeral 124 denotes a bolus body fixing portion 124 for fixing the bolus body C3. The bolus body fixing portion 124 is provided between the bolus body C3 and the main shaft 101, So that the main shaft 101 can rotate within the volute body C3.

13 is a graph for explaining the bubble generation efficiency of the nano bubble generator 100 of the present invention. It is to be noted that the particle distribution (red, G2) of the bubble generator using the conventional centrifugal pump and the nano bubble generation Is a graph for comparing the particle distribution (blue, G1) of the device. As shown in FIG. 13, the diameter of the bubble generated by the nano bubble generator 100 of the present invention is very small and the particle size is substantially the same as that of the bubble generated by the conventional bubble generator using the source pump. It can be seen that the distribution is uniform.

Although the present invention has been described with reference to the accompanying drawings, it should be noted that the scope of the present invention is defined by the following claims. In addition, those skilled in the art will be able to derive other modifications based on the description in the detailed description.

100: Nano bubble generator
101: main shaft 102: inducer impeller
103: Turbo impeller 104: Stator vane
105: Middle rotor 106: Middle stator
107: low rotor 108: space stator;
109: Low stator 110: Closed impeller
111: mechanical chamber 112: pulley
113: Water inlet 114: Water outlet
115: Cover Room C1: Top Cover
C2: Volute cover C3: Volute body

Claims (5)

A casing portion (C1, C2, C3) having a water inlet (113) and a water outlet (114);
A main shaft (101) arranged in the longitudinal direction in the casing portion and rotated by receiving power from the outside;
An inducer impeller (102) for first crushing bubbles contained in water while rotating in accordance with rotation of the main shaft to generate a vortex;
A turbo impeller (103) for secondarily crushing the bubbles contained in the water while rotating the main shaft at a rear end of the inducer impeller to increase the strength of the vortex;
A middle rotor 105 for crushing the bubbles contained in the water while rotating the main shaft at the rear end of the turbo impeller to increase the strength of the vortex;
A lower rotor (107) for crushing the bubbles contained in the water in the fourth stage while rotating the main shaft at the rear end of the middle rotor to increase the strength of the vortex;
A closed impeller 110 which rotates in accordance with rotation of the main shaft at a rear end of the low rotor and discharges water containing bubbles fourtharily crushed by the low rotor to the water outlet side;
And a stator vane for passing water including the secondary pulverized bubbles through the turbo impeller, wherein the turbo impeller is provided at its rear end with frictional resistance against water rotating by the turbo impeller to promote the secondary pulverization by the turbo impeller, (104);
A middle rotor disposed between the middle rotor and the low rotor and providing frictional resistance to water rotating by the middle rotor to promote the third milling by the middle rotor, A middle stator 106 for passing therethrough;
Wherein the low rotor is disposed between the low rotor and the closed impeller and provides frictional resistance to water rotating by the low rotor to promote the fourth order pulverization by the low rotor, A low stator 109 for passing therethrough; And
A spacer stator (1081) disposed between the middle stator and the low stator and disposed outside the low rotor (107) and having a concavo-convex pattern (1081) formed on an inner surface thereof for promoting the fourth- 108). ≪ / RTI > delete [2] The apparatus according to claim 1, wherein the casing portions (C1, C2, C3)
A top cover C1 formed with the water inlet and receiving the inducer impeller and the turbo impeller therein,
A bolt cover C2 coupled to the top cover with a first O-ring R1 interposed therebetween to receive the stator vane, the middle rotor, and the low rotor to prevent leakage of water,
And a volute body (C3) coupled to said volute cover and receiving said closed impeller with a second O-ring (R2) interposed therebetween to form said water outlet and prevent water leakage. , A nano bubble generator. 4. The top cover (C1) according to claim 3,
And a plurality of protrusions formed to face the inner surface of the top cover toward the turbo impeller and to facilitate the secondary pulverization of the bubbles contained in the water by interaction with the turbo impeller when the turbo impeller rotates, 121). ≪ / RTI > The turbine of claim 1, wherein the closed impeller (110)
A plurality of rotating blades 1103 for rotating the water flowing through the openings 1104 and a water outlet 1104 for rotating the water rotated by the rotating blades, And side passages (110) for discharging the nano bubble to the side of the nano bubble generating device.

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