KR102150865B1 - Nano Bubble Water Generator with Self-aligned Air Gap Structure - Google Patents

Abstract

The present invention relates to an apparatus for generating nanobubble water. Nanobubble water generating apparatus according to an embodiment of the present invention, the liquid supply member; A gas supply member; And a nanobubble generator for generating nanobubble water containing nano-sized bubbles by using the liquid supplied from the liquid supply member and the gas supplied from the gas supply member.

Description

Nano Bubble Water Generator with Self-aligned Air Gap Structure}

The present invention relates to an apparatus for generating nanobubble water. In one example, a nanobubble generator including a plurality of particles having a self-arranged pore structure of a plurality of particles may be included.

Dissolved oxygen has biological significance because fish and shellfish and aerobic microorganisms use dissolved oxygen (DO) in water to breathe, and organic matter is oxidatively decomposed by dissolved oxygen. In other words, lack of dissolved oxygen not only causes the death of fish and shellfish, but also increases organic matter, resulting in fouling of the water. In addition, when dissolved oxygen is insufficient during hydroponic cultivation, absorption of phosphoric acid (P), potassium (K), calcium (Ca), magnesium (Mg), manganese (Mn), etc. is not smooth, and the metabolic function of plants at the roots is poor. It is degraded and adversely affects plant vegetation. On the contrary, when ingesting water rich in dissolved oxygen, it is reported that the rate at which oxygen is absorbed by the cells is approximately 5 to 6 times faster than oxygen through respiration, which contributes to the activation of the living body. Therefore, efforts to increase the concentration of dissolved oxygen in water are being actively conducted in various fields such as hydroponic cultivation, fish and shellfish farming and preservation, washing/washing, medical care, bathing, and food and beverage.

For example, a device that can increase the concentration of dissolved oxygen in water is a bubble generator used in an aquarium or aquaculture. In the case of a bubble generator, the size of the bubble is adjusted using an air stone. The concentration of dissolved oxygen in water can be increased by maximizing contact. As described above, as a method for maximizing the contact between air and water, that is, a method for increasing the concentration of dissolved oxygen in water, a method of minimizing the size of bubbles (hereinafter, referred to as "bubbles") is used, but the bubbles contained in the water Depending on the size of the diameter, it is divided into micro bubbles (10 μm to several tens μm), micro-nano bubbles (hundreds of nm to 10 μm), and nano bobbles (˜hundreds of nm).

The smaller the size of the above-described bubble, the lower the rate of rise (float) and it is easily dissolved in water to increase the concentration of dissolved oxygen in water.In particular, nano bobbles have the effect of buoyancy in water due to their fine size. Since it is rarely received, it can remain in the water for a long time, and thus the concentration of dissolved oxygen in the water can be greatly increased.

On the other hand, as a device for generating nano bobbles, a method of using an air diffuser, a method of using a porous material and a frequency, a method of using ultrasonic waves, a vibration stirring method, a pressure reduction method, and a chemical spraying method have been proposed. However, it is known that among the above-described methods, except for the method of generating microbubbles using ultrasonic waves, nano-ization of bubbles is difficult and there is a problem of lack of stability because the size (diameter) of the bubbles is non-uniform. The method of use has disadvantages such as having to provide an ultrasonic generator. Therefore, in order to maximize the dissolved oxygen in water, various methods have been developed and researched in order to make the bubble in water as uniform and stable as possible, while making the size of the bubble nanoscale.

Republic of Korea Patent Registration No. 10-0852465 (announcement date: 2008. 08. 04), in order to provide fine monodisperse bubbles of nanometer size, gas is injected and dispersed in a liquid through a porous body so that the average diameter is Disclosed is a method of generating monodisperse bubbles having 0.2 to 200 μm.

Republic of Korea Patent Registration No. 10-0852465 (Announcement date: 2008. 08. 04)

An object of the present invention is to provide a nano-bubbled water generating device with improved nano-bubble generation efficiency.

In addition, nanobubbles can be economically generated, and the size and amount of generated bubbles can be easily controlled.

Nanobubble water generating apparatus according to an embodiment of the present invention, the liquid supply member; A gas supply member; And a nanobubble generator for generating nanobubble water containing nano-sized bubbles by using the liquid supplied from the liquid supply member and the gas supplied from the gas supply member.

The nanobubble generator includes a supply port through which liquid is supplied from the liquid supply member and an outlet through which the nanobubble water is discharged, and the nanobubble generator is disposed such that the supply port is located at an upper portion and the discharge port is located at a lower portion. , The liquid supplied from the liquid supply member may flow from the top to the bottom of the nanobubble generator.

The nanobubble generator may include a generator for generating nano-sized bubbles, and the generator may include a plurality of particles for generating nano-sized bubbles by decomposing the gas mixed in the liquid while passing therebetween.

The average particle diameter of the particles may be 0.1 to 3.0 mm.

Both ends are respectively connected to the supply port of the liquid supply member and the nanobubble generator, further comprising a first pipe for providing a passage for moving the liquid supplied from the liquid supply member to the nanobubble generator, the gas supply The member may include a first part connected to the first pipe and one end to increase a flow velocity of the fluid supplied from the first pipe, and a second part connected to the other end of the first part and one end.

The gas supply member includes a nipple structure surrounding at least a portion of an outer surface of the first portion and at least a portion of an outer surface of the second portion, and a supply structure providing a passage for supplying external air to the outer surface of the second portion. May contain more wealth.

The gas supplied from the supply structure of the nipple part may move between the outer surface of the second part and the inner surface of the nipple structure.

The gas supply member may further include a third portion disposed so that at least a portion of the inner surface surrounds the outer surface of the other end of the second portion, and reducing a pressure of the fluid supplied from the second portion.

The gas supply member further includes a third portion disposed so that at least a portion of the inner surface surrounds the outer surface of the other end of the second portion, and further includes a third portion for reducing a pressure of the fluid supplied from the second portion, and from the supply structure of the nipple portion The supplied gas may move between the outer surface of the second part and the inner surface of the nipple structure, and may be supplied as a fluid flowing along the inner surface of the third part.

In another embodiment, the gas supply member includes a nipple structure connected to the first pipe to provide a passage through which fluid supplied from the first pipe flows, and a nipple portion including a supply structure connected to the outside, and one end And an air inlet portion disposed on the inner surface of the supply structure to communicate with the outside, and the other end is disposed inside the passage provided by the nipple structure to provide a passage for supplying external air to the fluid flowing along the passage. I can.

The nano-bubbled water generating device according to an embodiment of the present invention improves nano-bubble generation efficiency.

In addition, nanobubbles can be economically generated, and the size and amount of generated bubbles can be easily controlled.

1 shows a nanobubble water generator according to an embodiment of the present invention.
2 is a view showing a nanobubble water generating device according to another embodiment of the present invention.
3 shows a nanobubble generator according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view taken along AA′ of FIG. 3.
5 shows a gas supply member according to an embodiment of the present invention.
6 is a cross-sectional view taken along BB′ of FIG. 5.
Figure 7 shows the flow of liquid and gas in Figure 6.
8 shows a gas supply member according to another embodiment of the present invention.
9 is a cross-sectional view taken along line GG' of FIG. 8.
10 shows the content of the average particle diameter of nanobubbles generated when particles having an average particle diameter of 0.1 mm are applied to a nanobubble device.
11 shows the content of the average particle diameter of the nanobubbles generated when particles having an average particle diameter of 0.3 mm are applied to the nanobubble device.
12 shows the content of the average particle diameter of nanobubbles generated when particles having an average particle diameter of 0.8 mm are applied to the nanobubble device.
13 is The content of the average particle diameter of the nanobubbles generated when particles having an average particle diameter of 0.1 mm are applied to a horizontally arranged nanobubble device is shown.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, embodiments of the present invention are provided in order to more completely explain the present invention to those having average knowledge in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation, and elements indicated by the same reference numerals in the drawings are the same elements. In addition, the same reference numerals are used throughout the drawings for portions having similar functions and functions. In addition, "including" certain elements throughout the specification means that other elements may be further included rather than excluding other elements unless specifically stated to the contrary.

1 shows a nanobubble water generator 100 according to an embodiment of the present invention. Referring to Figure 1, the nano-bubble water generating apparatus 100 according to an embodiment of the present invention, a liquid supply member 130; A gas supply member 120; And a nano-bubble generator 110 for generating nano-bubble water containing nano-sized bubbles by using the liquid supplied from the liquid supply member 130 and the gas supplied from the gas supply member 120. .

The nanobubble generator 110 functions to include nano-sized bubbles (bubbles) in the liquid supplied from the liquid supply member 130. The liquid supplied to the nanobubble generator 110 contains the gas supplied from the gas supply member 120, and the liquid containing the gas passes through the nanobubble generator 110, thereby forming a nano-size on the liquid. Bubbles are formed.

3 is a view showing a nano bubble generator 110 according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along AA′ of FIG. 3. 3 and 4, the nanobubble generator 110 according to an embodiment of the present invention includes a generator 112 for generating nano-sized bubbles, and the generator 112 is mixed with a liquid. The gas may include a plurality of particles 114 that are decomposed while passing therebetween to generate nano-sized bubbles. The pores formed between the plurality of particles become a passage through which fluid and gas pass, and vibration occurs between the particles according to the flow of the fluid, and the gas mixed in the fluid regularly repeats contraction and expansion, resulting in nano-sized bubbles It can perform the function that makes it possible.

The generator 112 may include a supply port 111 through which a liquid is introduced at an upper portion, and an outlet 113 through which a liquid including nanobubbles is discharged, and the supply port 111 and A space for supporting the plurality of particles 114 may be included between the discharge ports 113. In addition, in order to prevent the plurality of particles 114 from moving to the supply port 111 and the discharge port 113, the space for supporting the plurality of particles 114 and between the supply port 111 and a plurality of particles Screen members 115a and 115b may be further included between the space supporting the 114 and the discharge port 113.

The screen members 115a and 115b may prevent the particles 114 from being lost and may perform a function of stably disposing the particles 114. In addition, the screen members 115a and 115b may perform a filtering function to block foreign substances from being introduced or discharged. In addition, since the screen members 115a and 115b contain fine pores, the size of the nanobubbles generated by the plurality of particles 114 can be made smaller, or a function of preventing bubbles larger than a certain size from being discharged. Can be done. The screen members 115a and 115b may have elasticity, and may press the plurality of particles 114 from at least one of the upper and lower portions. Through this, since the particles 114 can be more stably disposed, the functions described above can be performed more efficiently. The screen members 115a and 115b may be sponge, nonwoven fabric, fiber, glass wool, ceramic filter, metal filter, or the like. The screen members 115a and 115b may be disposed on only one of the supply port 111 and the discharge port 113, and may be disposed to surround a plurality of particles 114 as necessary. The position, thickness, and number of the screen members 115a and 115b are not particularly limited.

The average particle diameter of the particles 114 may be 0.1 to 3.0 mm, preferably 0.1 to 1.5 mm, more preferably 0.1 to 0.8 mm, more preferably 0.1 to 0.3 mm. When the average size of the particles 114 is less than 0.1 mm, a high load is generated when the liquid passes between the particles 114, and the flow velocity may be significantly reduced. In addition, when the average size of the particles 114 exceeds 1.5 mm, the space between the particles 114 is enlarged, so that the size (particle diameter) of the formed bubbles exceeds 1000 nm, reducing the efficiency of nanobubble formation. do. When the size of the particles 114 is 0.8 mm or less, the size (particle diameter) of 95% or more of the formed nanobubbles is maintained at 500 nm or less, so that the nanobubbles can be more stably formed. In addition, when the size of the particles 114 is 0.3 mm or less, 99% or more of the formed nanobubbles have a size (particle diameter) of 500 nm or less, so that the nanobubbles can be more stably formed.

The shape of the particles 114 is not particularly limited, but may have a spherical or elliptical bead shape in order to prevent breakage of the particles 114 and uniformly control the spacing between the particles 114. The material of the particles 114 is not particularly limited, but may be a material having chemical resistance to various liquids and durability against collision. For example, the material of the particles 114 may be inorganic materials such as ceramics and metals, and organic materials such as PET, PS, PP, HDPE, LDPE, and PVP.

Referring to FIG. 1, the nanobubble generator 110 may be disposed vertically based on the flow direction of the liquid, and the liquid may be disposed to flow from the top to the bottom of the nanobubble generator 110. have. More specifically, the nanobubble generator 110 includes a supply port 111 for supplying liquid from the liquid supply member 130 and an outlet 113 for discharging the nanobubble water, and the nanobubble generator ( 110 is arranged such that the supply port 111 is located at the top and the discharge port 113 is located at the bottom, and the liquid supplied from the liquid supply member 130 goes from the top to the bottom of the nanobubble generator 110 Can flow. The nanobubble generator 110 includes a plurality of particles 114 therein, and a liquid passes between the particles 114 to generate nanobubbles. Due to these technical features, it may be important to stably arrange the particles 114 inside the nanobubble generator 110 so that the gap between the particles 114 is kept constant in order to constantly control the size of the nanobubbles. have. The nanobubble generator 110 according to the embodiment of the present invention is arranged vertically with respect to the flow direction of the liquid so that the direction of the gravity applied to the particles 114 and the flow direction of the liquid coincide with each other. The size can be controlled constant. In addition, since the particles 114 receive pressure in the same direction by gravity and the flow of the liquid, the gap between the particles 114 becomes dense, and thus the size of the generated nanobubbles can be controlled to be smaller.

The liquid supply member 130 serves to supply liquid to the nanobubble generator 110. The liquid supply member 130 is not particularly limited as long as it is used to transfer liquid. The liquid supply member 130 may include any one of a reciprocating pump, a rotary (rotation) pump, a centrifugal pump, an axial pump, and a friction pump to transfer liquid. The liquid supply member 130 may further include a liquid supply source 150 for storing the liquid, and may further include a valve for controlling the transfer of the liquid and a flow meter for measuring the transfer amount of the liquid. The liquid supplied by the liquid supply member 130 is not particularly limited. For example, for application to hydroponic cultivation, it may be raw water containing a culture medium in which nutrients necessary for growing plants are dissolved.

The liquid supply member 130 and the nanobubble generator 110 are connected by a pipe, and a gas supply member 120 may be disposed therebetween. In one embodiment, both ends are connected to the supply port 111 of the liquid supply member 130 and the nanobubble generator 110, respectively, and the liquid supplied from the liquid supply member 130 is transferred to the nanobubble generator ( It may further include a first pipe 140 providing a passage to move to 110. A check valve may be disposed in the first pipe 140 to prevent backflow of liquid.

The arrangement position of the liquid supply member 130 is not particularly limited as long as the fluid from the liquid supply source 150 can be supplied to the nanobubble generator 110. The liquid supply member 130 may be disposed at the front end of the nanobubble generator 110 to supply liquid to the nanobubble generator 110 as shown in FIG. 1. In addition, the liquid supply member 130 may be disposed at the rear end of the nanobubble generator 110 as shown in FIG. 2 to supply liquid to the nanobubble generator 110.

The gas supply member 120 performs a function of injecting gas into the liquid supplied from the liquid supply member 130. The gas is not particularly limited, and may be air, oxygen, and ozone, for example.

5 is a diagram illustrating a gas supply member 120 according to an embodiment of the present invention, FIG. 6 is a cross-sectional view taken along BB′ of FIG. 5, and FIG. 7 is a liquid flow C and a gas flow D ) Is displayed. 5 to 7, the gas supply member 120 has one end connected to the first pipe 140 and increases the flow velocity of the fluid supplied from the first pipe 140. ), and a second part 122 connected to the other end and one end of the first part 121. In addition, the gas supply member 120 has a nipple structure surrounding at least a part of the outer surface of the first part 121 and at least part of the outer surface of the second part 122 and the outer surface of the second part 122 It may further include a nipple portion 124 including a supply structure 125 for providing a passage for supplying external air. Through this, the gas supplied from the supply structure 125 of the nipple part 124 may move and be mixed with the fluid whose flow rate is changed. In addition, by having such a structure, the amount of gas mixed with the liquid can be kept constant, and while the gas passes through the gas supply member 120 and flows into the liquid, it is primarily split to form nanobubbles. It can be efficient to create.

In one example, the gas supplied from the supply structure 125 of the nipple part 124 moves to the end of the second part 122 along the outer surface of the second part 122 and the inner surface of the nipple structure Can then be mixed into the liquid. The second part 122 may be formed such that an outer surface of the end of the second part 122 is inclined toward the inside of the second part 122 in order to facilitate mixing of the gas supplied from the nipple structure into a liquid. In addition, the other end of the second part 122 may have a nozzle shape to reduce the pressure of the fluid flowing along the inner surface. More specifically, an inner portion of the end of the second portion 122 may be formed to be inclined toward the outside of the second portion 122.

The gas supply member 120 is disposed so that at least a portion of the inner surface surrounds the outer surface of the other end of the second portion 122, and reduces the pressure of the fluid supplied from the second portion 122 It may further include (123). In this case, the gas supplied from the supply structure 125 of the nipple part 124 moves between the outer surface of the second part 122 and the inner surface of the nipple structure to follow the inner surface of the third part 123. It can be supplied as a flowing fluid. Through this, the gas supplied from the supply structure 125 of the nipple part 124 can be stably guided toward the liquid, and the liquid can be prevented from flowing out to the outer surface of the second part 122. The second part 122 and the third part 123 may have a hollow cylindrical shape that penetrates the inside, and the inner diameter of the third part 123 is 0.1 to 3.0 than the outer diameter of the second part 122 mm, preferably 1.6 mm larger. In addition, the shape of the portion of the nipple portion 124 surrounding the second portion 122 may be a hollow cylindrical shape to surround the second portion 122, the inner diameter of which is greater than the outer diameter of the second portion 122 It may be larger than 0.4 to 2.4 mm, preferably 1.7 to 1.8 mm. In this case, the distance (f) between the inner surface of the third part 123 and the outer surface of the second part 122 is shorter than the distance (e) between the nipple part 124 and the outer surface of the second part 122 Is formed, and the gas supplied from the supply structure 125 of the nipple part 124 is stably guided from the nipple part 124 to the third part 123, and prevents the fluid from flowing out to the nipple part 124 can do.

The material of the first part 121, the second part 122 and the nipple part 124 is not particularly limited, and may be an alloy or a polymer material having low reactivity in consideration of durability and chemical resistance. The material of the third part 123 is not particularly limited, and may be a polymer material such as Teflon for stable bonding with the second part 122.

8 is a diagram illustrating a gas supply member according to another embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along line GG' of FIG. 8. 8 and 9, the gas supply member includes a nipple structure connected to the first pipe to provide a passage through which the fluid supplied from the first pipe flows, and a nipple unit including a supply structure communicating to the outside ( 124'), and one end is disposed on the inner surface of the supply structure to communicate with the outside, and the other end is disposed inside the passage provided by the nipple structure to provide a passage for supplying external air to the fluid flowing along the passage. It may include an air inlet (121').

The nipple part 124 ′ may have a T shape, and the air inflow part 121 ′ may have an L shape. By having such a structure, an appropriate amount of gas can be mixed into the fluid according to the flow rate and flow rate. In addition, by changing the inner diameter and shape of the other end of the air inlet 121 ′, the amount of gas mixed with the fluid and the bubble size may be controlled.

The liquid including nanobubbles passing through the nanobubble generator 110 may be supplied to the outside along a pipe.

The nano-bubble water generator according to an embodiment of the present invention generates nano-sized bubbles, excellent cleaning and sterilization effects, and can greatly increase the amount of dissolved oxygen. By having such an effect, it can be applied to hydroponic cultivation, fish and shellfish farming, cosmetics, and dental hygiene water. In addition, the cleaning effect can be increased by providing nanobubble water as the process water for removing impurities from the process surface of the semiconductor wafer.

Table 1 shows various measurement values of the generated nanobubbles according to the average size of the particles included in the nanobubble generator. 10 to 12 show the content of the average particle diameter of the nanobubbles generated when particles having an average particle diameter of 0.1, 0.3 and 0.8 mm are applied to the nanobubble device, respectively. The nanobubble generator was arranged vertically, and the liquid was arranged to flow from the top to the bottom of the nanobubble generator. The particles were spherical with an average particle diameter of 0.1, 0.3 and 0.8 mm, and the particles had an average particle diameter of 0.1 mm, and BZ-01 of AZ ONE was used, and YTZ-0.3 of Nikkato was used with an average particle diameter of 0.3 mm. Was used, and a 0.8 mm AGSB-20 of AZ ONE was used. Water was used as the liquid, and air was used as the gas. For the size of the nanobubbles, the particle size analyzer NS300 from Malvern Panalytical's Malvern NanoSight product line was used.

Particle average particle diameter (mm) Nano bubble average particle diameter (nm) Nano bubble mode (nm) Nano bubble content for fluid (particles/ml) Nano bubble standard deviation (nm) 0.1 101.8 58.9 4.41e+008 59.2 0.3 146.2 89.9 4.60e+008 69.6 0.8 159.6 88.3 6.31e+008 97.5

Referring to Table 1 and FIGS. 10 to 12, it can be seen that the smaller the average particle diameter of the particles, the finer the average particle diameter of the generated nanobubbles and the standard deviation decreases. In addition, when the average particle diameter of the particles is 0.8 mm, it is observed that the particle diameter of the generated nanobubbles exceeds 600 nm (see Fig. 12), but when the average particle diameter of the particles is 0.3 mm, the particle diameter of the generated nanobubbles is It can be seen that it is 500 nm or less, and it can be seen that the standard deviation is greatly reduced (see FIG. 11).

Table 2 shows various measurement values of the generated nanobubbles according to the arrangement direction of the nanobubble generator and the flow direction of the liquid, and FIG. 13 is The content of the average particle diameter of the nanobubbles generated when particles having an average particle diameter of 0.1 mm are applied to a horizontally arranged nanobubble device is shown. The position of the nanobubble generator was placed vertically and horizontally, and the liquid was measured by flowing from the top to the bottom and from the bottom to the top of the nanobubble generator. The particles had an average particle diameter of 0.1 mm and were spherical, and the particles of Table 1 were used. The remaining experimental conditions were the same as in Table 1 above.

Nano bubble generator arrangement direction Liquid flow direction Nano bubble average particle diameter (nm) Nano bubble mode (nm) Nano bubble content for fluid (particles/ml) Nano bubble standard deviation (nm) Perpendicular Top → bottom 101.8 58.9 4.41e+008 59.2 Perpendicular Bottom → top - - - - level Left → right 152.2 99.2 2.76e+008 91.5

In the case where the nanobubble generator was placed vertically and liquid was supplied from the bottom to the top, the liquid did not pass through the nanobubble generator at a sufficient flow rate, so it was practically impossible to apply, and the nanobubbles could not be measured.

Referring to Table 2, Fig. 10 and Fig. 13, when the nanobubble generator is arranged vertically and the liquid is supplied in the upward → downward direction, the average particle diameter of the nanobubbles can be controlled to be small, and the standard deviation can be significantly reduced. have. In addition, it can be seen that the content of nanobubbles increases.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited by the appended claims. Therefore, various types of substitutions, modifications and changes will be possible by those of ordinary skill in the art within the scope not departing from the technical spirit of the present invention described in the claims, and this also belongs to the scope of the present invention. something to do.

100: nano bubble water generator
110: nano bubble generator
111: supply port
112: generator
113: outlet
114: particle
115a, 115b: screen member
120: gas supply member
121: part 1
122: part 2
123: part 3
124: nipple part
125: supply structure
130: liquid supply member
140: first pipe
150: liquid supply source
121': air inlet
124': nipple part
C: liquid flow
D: gas flow
e: the distance between the nipple part and the outer surface of the second part
f: distance between the inner surface of the third part and the outer surface of the second part

Claims (10)

delete delete delete delete A liquid supply member;
A gas supply member; And
Including; a nano-bubble generator for generating nano-bubble water containing nano-sized bubbles by using the liquid supplied from the liquid supply member and the gas supplied from the gas supply member,
The liquid supply member and both ends are connected to the supply port of the nanobubble generator, further comprising a first pipe for providing a passage for moving the liquid supplied from the liquid supply member to the nanobubble generator,
The gas supply member includes a first part connected to the first pipe and one end to increase the flow velocity of the fluid supplied from the first pipe, and a second part connected to the other end of the first part and one end, at least a part of the inner surface A third portion disposed so as to surround the outer surface of the other end of the second portion and reducing the pressure of the fluid supplied from the second portion, and a nipple portion,
The nipple portion includes a nipple structure surrounding at least a portion of an outer surface of the first portion and at least a portion of an outer surface of the second portion, and a supply structure providing a passage for supplying external air to the outer surface of the second portion,
The gas supplied from the supply structure of the nipple part moves along the outer surface of the second part and the inner surface of the nipple structure, and then moves along the outer surface of the second part and the inner surface of the third part, and the inner surface of the third part Is supplied as a fluid flowing along,
The distance between the inner surface of the nipple portion and the outer surface of the second portion is longer than the distance between the inner surface of the third portion and the outer surface of the second portion,
The outer surface portion of the other end of the second portion is formed to be inclined toward the inside of the second portion,
Nano bubble water generator.
The method of claim 5,
The nanobubble generator includes a supply port through which liquid is supplied from the liquid supply member and an outlet through which the nanobubble water is discharged,
The nanobubble generator is disposed such that the supply port is located at the top and the discharge port is located at the bottom,
The liquid supplied from the liquid supply member flows from the top to the bottom of the nanobubble generator,
Nano bubble water generator.
The method of claim 6,
The nanobubble generator includes a generator for generating nano-sized bubbles,
The generator includes a plurality of particles that allow the gas mixed in the liquid to be decomposed while passing through therebetween to generate nano-sized bubbles,
Nano bubble water generator.
The method of claim 7,
The average particle diameter of the particles is 0.1 to 3.0 mm,
Nano bubble water generator.
delete delete

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