[go: up one dir, main page]

KR100206746B1 - Aeration device using acoustic resonance - Google Patents

Aeration device using acoustic resonance Download PDF

Info

Publication number
KR100206746B1
KR100206746B1 KR1019960048193A KR19960048193A KR100206746B1 KR 100206746 B1 KR100206746 B1 KR 100206746B1 KR 1019960048193 A KR1019960048193 A KR 1019960048193A KR 19960048193 A KR19960048193 A KR 19960048193A KR 100206746 B1 KR100206746 B1 KR 100206746B1
Authority
KR
South Korea
Prior art keywords
air
chamber
oxygen
water
acoustic resonance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
KR1019960048193A
Other languages
Korean (ko)
Other versions
KR19980028981A (en
Inventor
문종덕
홍석윤
보트레비치
Original Assignee
김덕중
사단법인고등기술연구원연구조합
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김덕중, 사단법인고등기술연구원연구조합 filed Critical 김덕중
Priority to KR1019960048193A priority Critical patent/KR100206746B1/en
Publication of KR19980028981A publication Critical patent/KR19980028981A/en
Application granted granted Critical
Publication of KR100206746B1 publication Critical patent/KR100206746B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
    • B01F23/237612—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/238—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using vibrations, electrical or magnetic energy, radiations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

본 발명은 음향공진을 이용한 산기장치에 관한 것으로, 공기가 들어가는 입구와, 상기 입구를 통해 유입된 공기가 회전 소용돌이(vortex)를 형성하는 챔버와, 상기 챔버에서 회전소용돌이를 형성하는 공기가 음향에너지를 발생시키면서 수중으로 공급하는 출구로 구성되어 산소의 용해도를 증가시켜 줌으로써 산소전달 효율이 증가된다. 또한 적은 양의 공기를 공급하여도 같은 정도의 용존산소를 얻을수 있으므로 산소 공급장치의 운전비용이 절약되고, 구조가 간단하여 제작이 용이하며 수중식물의 번식으로 인해 자주 청소해 주어야 하는 번거로움을 해결할수 있다.The present invention relates to an air diffusing apparatus using acoustic resonance, and more particularly, to an air diffusing apparatus using acoustic resonance, in which a chamber in which air enters, a chamber in which air introduced through the inlet forms a rotating vortex, And an outlet through which water is supplied, thereby increasing the oxygen transfer efficiency by increasing the solubility of oxygen. In addition, even if a small amount of air is supplied, the same amount of dissolved oxygen can be obtained. Therefore, the operation cost of the oxygen supplying device can be saved, the structure can be easily manufactured, and the troublesomeness can do.

Description

음향공진을 이용한 산기장치Acid resonator using acoustic resonance

제1도는 종래 기술의 산기장치의 사시도.FIG. 1 is a perspective view of a prior art diffuser. FIG.

제2도는 제1도에 도시한 장치의 단면도.FIG. 2 is a cross-sectional view of the apparatus shown in FIG.

제3도는 다른 종래기술의 산기장치의 단면도.FIG. 3 is a cross-sectional view of another prior art diffuser device; FIG.

제4도는 제3도에 도시한 산기장치의 평면도.FIG. 4 is a plan view of the air diffuser shown in FIG. 3; FIG.

제5도는 본 발명에 의한 산기장치의 전단면도.FIG. 5 is a front sectional view of a diffuser according to the present invention. FIG.

제6도는 제5도에 도시한 산기장치의 A-A' 단면도.FIG. 6 is a cross-sectional view taken along line A-A 'of the diffuser of FIG. 5;

제7도는 본 발명에 의한 산기장치의 작동을 나타내는 단면도.FIG. 7 is a sectional view showing the operation of the air diffuser according to the present invention; FIG.

제8도 및 제9도는 본 발명의 산기장치의 다른 실시예를 나타내는 단면도.FIG. 8 and FIG. 9 are cross-sectional views showing another embodiment of the oxidizer of the present invention. FIG.

* 도면의 주요부분에 대한 부호의 설명DESCRIPTION OF THE REFERENCE NUMERALS

1 : 접속구 몸체 2, 2' : 고정대1: Connection port body 2, 2 ': Fixture

3 : 파이프 4 : 공기 흡입구3: Pipe 4: Air intake

5 : 공기 통과구 6 : 그물망5: air passage hole 6: mesh

7 : 공기 덮개망 8 : 챔버7: air cover mesh 8: chamber

9 : 입구 10 : 출구9: entrance 10: exit

d1 : 챔버 하부 직경 d2 : 챔버 상부 직경d1: chamber bottom diameter d2: chamber top diameter

d3 : 입구 직경d3: inlet diameter

본 발명은 음향공진을 이용한 산기장치에 관한 것으로, 특히 폐수처리장의 산소공급장치에 있어서 회전 소용돌이와 공진에 의한 음향에너지를 이용하여 산소의 용해도를 증가시켜 산소전달 효율을 향상시키는 음향공진을 이용한 산기장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acidifier device using acoustic resonance, and more particularly, to an acidifier device using acoustic resonance that increases oxygen solubility by using acoustic energy generated by a rotating vortex and resonance, ≪ / RTI >

종래의 산기장치는 제1도 및 제2도에 도시한 바와 같이 접속구 몸체(1), 고정대(2), 및 파이프(3)로 구성되어서, 접속구 몸체(1)로 들어온 공기가 파이프(3)의 미세구멍으로 통과하면서 작은 공기방울로 형성되어 물속에 공급된다. 이때, 파이프(3)는 별도의 구멍이 있는 것이 아니라 세라믹이나 폴리 에틸렌(P.E.)을 이용하여 파이프를 만들 때 미리 미세구멍이 생성되도록 제작된 것이다. 그러나 이 장치는 단순히 미세구멍을 통과시켜 공기 방울의 크기를 축소시키는 장치로서, 공기 방울의 크기를 축소시키는 데는 한계가 있으며 또한, 미세 구멍 사이에는 수중식물이 번식하기 때문에 미세구멍이 막혀서 자주 청소를 해주어야 하며 또한 사용 가능한 통기량도 적다.The conventional air diffuser is composed of a connection port body 1, a fixing table 2 and a pipe 3 as shown in Figs. 1 and 2 so that air entering the connection port body 1 flows into the pipe 3, And formed into small air bubbles while being supplied to the water. In this case, the pipe 3 is not formed with a separate hole but is made so as to generate a fine hole in advance when the pipe is made of ceramic or polyethylene (P.E.). However, this device simply reduces the size of air bubbles by passing through fine holes. There is a limit to reduce the size of air bubbles. Also, because of the propagation of water plants between the fine holes, And the amount of ventilation available is also small.

다른 종래의 기술로서는 제3도 및 제4도와 같이 공기 흡입구(4)를 통하여 들어온 공기가 공기 통과구(5) 및 그물망(6)을 통과하면서 작은 공기방울로 쪼개져서 공기 덮개망(7)을 거쳐 물속에 공급되도록 한 장치가 있다. 그러나 이 장치에서는 제조상, 공기 덮개망(7)의 구멍을 작게 하는 데 한계가 있으며 따라서 큰 공기방울이 물속에 방출되어 그 효율이 매우 낮다.3 and 4, the air introduced through the air inlet port 4 is split into small air bubbles while passing through the air passageway 5 and the mesh 6, There is a device that is supplied to the water through. However, in this device, there is a limit in manufacturing the air hole 7 in the air hole, so that a large air bubble is released into the water and its efficiency is very low.

따라서, 본 발명은 상기 문제점을 해결하기 위해 공기의 회전 소용돌이와 음향공진에 의해 발생된 에너지를 이용하여 기체방울을 작게 쪼개주고, 기체, 특히 산소의 용해도를 증가시켜 산소전달 효율을 증가시키는 것을 목적으로 한다.Accordingly, in order to solve the above-described problems, the present invention aims to reduce the gas droplets by using energy generated by the rotating vortex and the acoustic resonance of the air and increase the oxygen transfer efficiency by increasing the solubility of the gas, .

본 발명은 상기 목적을 달성하기 위해 공기가 들어가는 입구와, 상기 입구를 통해 유입된 공기가 회전 소용돌이(vortex)를 형성하는 챔버와, 상기 챔버에서 회전소용돌이를 형성하는 공기가 음향에너지를 발생시키면서 수중으로 공급하는 출구로 구성되는 것을 특징으로 한다.In order to achieve the above-mentioned object, the present invention provides a method of manufacturing an air conditioner, comprising: an air inlet; a chamber in which air introduced through the inlet forms a rotating vortex; And an outlet for supplying the gas to the outlet.

본 발명에 따른 산기장치는 기체를 액체에 용해시키는 기술분야에서는 어디에나 사용될 수 있으며, 바람직하게는, 폐수처리장치에서 산소의 공급장치로서 사용될 수 있다.The oxidizer according to the present invention can be used anywhere in the technical field of dissolving a gas in a liquid, and can preferably be used as a supply device for oxygen in a wastewater treatment apparatus.

이하, 첨부된 도면을 참조하여 본 발명을 상세하게 설명하기로 한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제5도는 본 발명에 의한 산기장치의 전단면도로서, 기체가 챔버(8)의 접선방향으로 만들어진 입구(9)로 들어오면 회전 소용돌기(vortex)가 형성되면서 출구(10)로 빠져 나간다. 이때 제7도에서 도시된 바와같이, 입구(9)에서 Pair의 압력으로 유입된 기체는 챔버(8)내에서 접선방향으로 회전을 하기 때문에 챔버 중앙의 압력은 상대적으로 낮고 바깥쪽으로 갈수록 압력이 낮아진다. 따라서, 압력이 상대적으로 낮은 챔버의 공기출구(10) 중앙으로부터 물이 챔버내로 유입되며, 상기 유입된 물은 회전하고 있는 기체에 휘말려 원운동을 하게되고, 상기 원운동의 원심력에 의하여 물은 챔버의 바깥쪽으로 나가면서 챔버 하부에서 회전하면서 올라오는 기체와 함께 회전 소용돌이를 형성하면서 수중으로 기체가 잘게 쪼개지면서 방출된다. 수중으로 방출될 때, 챔버내로 유입되는 물과 방출되는 물/기체 사이에는 서로의 압력차에 의하여 주파수(F)로 공진이 발생하게 되며, 상기 공진에 의한 음향에너지가 물속으로 전달되면서 공기방울에서 물로의 물질전달저항을 감소시켜 기체, 산소의 용해속도를 빠르게 한다. 뿐만 아니라, 상기 공진에 의하여 수중의 기체방울은 수직상승을 하지 않고 수평운동을 하면서 상승하기 때문에 기체의 수중에서의 체류시간을 증가시켜, 더많은 기체가 용해될 수 있게 한다.FIG. 5 is a front sectional view of the diffuser according to the present invention. When the gas enters the inlet 9 made in the tangential direction of the chamber 8, the vortex for the rotary is formed and escapes to the outlet 10. As shown in FIG. 7, since the gas introduced into the inlet 9 at the pressure of P air tangentially rotates in the chamber 8, the pressure in the center of the chamber is relatively low and the pressure in the chamber 8 is relatively low Lower. Accordingly, water is introduced into the chamber from the center of the air outlet 10 of the chamber having a relatively low pressure, and the introduced water is subjected to a circular motion by being caught by the rotating body. By the centrifugal force of the circular motion, The gas is discharged from the lower portion of the chamber while being divided into the water while forming a rotating vortex together with the rising gas. When discharged into water, a resonance occurs at a frequency (F) due to the pressure difference between the water flowing into the chamber and the water / gas discharged, and the acoustic energy due to the resonance is transmitted to the water, Reduces the mass transfer resistance to water to accelerate the dissolution rate of gas and oxygen. In addition, due to the resonance, the gas droplet in the water rises while moving horizontally without vertical rise, thereby increasing the residence time of the gas in the water, thereby allowing more gas to be dissolved.

이때 공진 주파수는 다음과 같다.At this time, the resonance frequency is as follows.

여기서, 음향공진의 크기 및 주파수는 챔버내의 마찰로 인한 공기의 회전속도 감소와 연관된 계수(K), 챔버하부의 직경(d1), 챔버하부의 지름에서 수직으로 뻗은 높이(h), 유입공기의 압력(Pair), 산기장치 출구에서의 물의 압력(Pwater)에 의해 좌우된다. 또한 C는 음속으로서, 본 발명에서는 기체와 물이 혼합된 상태의 매질에서의 음속이나, 실제 산기장치의 작동조건에서는 기체가 대부분의 매질을 차지하기 때문에 공기중의 음속(340m/s)에 가깝다. 또한 계수 K는 산기장치에 따라 실험에 의해 측정된다.Here, the magnitude and frequency of the acoustic resonance are a function of the coefficient K associated with the reduction of the rotational speed of the air due to friction in the chamber, the diameter d1 of the lower chamber, the height h extending vertically from the diameter of the lower chamber, Pressure (P air ), and the pressure of water at the outlet of the diffuser (P water ). In the present invention, C is near the sound speed in the air (340 m / s) in the present invention because the gas occupies most of the medium in the sound velocity in the medium in which the gas is mixed with water and in the operating condition of the actual diffuser . The coefficient K is also measured experimentally according to the diffuser.

본 발명가들의 실험에 의하면, 챔버하부의 지름에서 수직으로 뻗은 높이(h)가 30mm이고, 챔버하부의 직경(d1)이 20mm이면 △P(Pair-Pwater)는 2기압 이하이고 챔버하부의 지름(d1)/입구 지름(d3)의 비가 5 내지 8일때 공기의 회전 소용돌이와 공진에 의한 음향에너지에 의해 기체방울을 작게 쪼개주고 산소의 용해도를 증가시켜 산소 전달 효율이 종래의 산기장치에 비하여 30%이상 향상된 결과를 얻을수 있다.According to the experiment of the present inventors, when the height h extending vertically from the diameter of the lower part of the chamber is 30 mm and the diameter d1 of the lower part of the chamber is 20 mm, ΔP (P air -P water ) is 2 atm or less, When the ratio of the diameter (d1) / the inlet diameter (d3) is 5 to 8, the gas droplets are divided by the acoustic vortex due to the rotating vortex and resonance of the air and the solubility of oxygen is increased, You can get more than 30% better results.

이때 산소 전달 효율은 다음과 같다.At this time, the oxygen transfer efficiency is as follows.

제6도는 제5도에 도시한 산기장치의 A-A' 단면도로서, 공기가 챔버(8)의 접선방향으로 만들어진 입구(9)로 들어오면 회전 소용돌이(vortex)가 형성되고 상기 형성된 소용돌이가 출구(10)로 빠져 나가는 것을 나타낸 것이다.FIG. 6 is a cross-sectional view taken along the line AA 'of FIG. 5, in which a rotating vortex is formed when air enters the inlet 9 made in the tangential direction of the chamber 8 and the formed vortex forms an outlet 10 ). ≪ / RTI >

제8도 및 제9도는 본 발명의 산기장치의 다른 실시예를 나타내는 단면도로서, 제5도의 본 발명의 산기장치에서 챔버의 하부(d1) 및 상부(d2)직경이 동일하지만, 상부직경이 더 작을 경우에 산기장치의 효과가 더 우수하다. 그러므로 상부직경을 줄이기 위한 챔버 출구(10)의 모양에는 여러 가지가 있겠지만 제8도 및 제9도에 도시된 바와 같은 모양도 산기효율이 우수한 것을 나타낸 것이다.8 and 9 are cross-sectional views showing another embodiment of the diffuser of the present invention. In the diffuser of the present invention of FIG. 5, the lower portion d1 and the upper portion d2 of the chamber have the same diameter, The effect of the air diffuser is better. Therefore, although there are various shapes of the chamber outlet 10 for reducing the diameter of the upper portion, the shapes shown in FIGS.

본 발명은 공기의 회전 소용돌이와 음향공진에 의해 발생된 에너지를 이용하여 공기방울을 작게 쪼개주고, 산소의 용해도를 증가시켜 줌으로써 산소전달 효율이 증가된다. 또한 적은 양의 공기를 공급하여도 같은 정도의 용존산소를 얻을수 있으므로 산소 공급장치의 운전비용이 절약되고, 구조가 간단하여 제작이 용이하고 수중식물의 번식으로 인해 자주 청소해 주어야 하는 번거로움을 해결할 수 있다.The present invention increases the oxygen transfer efficiency by dividing the air bubbles into small pieces using the energy generated by the rotating vortex and the acoustic resonance of the air, and increasing the solubility of the oxygen. In addition, since the same amount of dissolved oxygen can be obtained even if a small amount of air is supplied, the operation cost of the oxygen supply device can be saved, the structure can be easily manufactured, and the troublesome cleaning due to the breeding of aquatic plants can be solved .

Claims (5)

공기가 들어가는 입구와, 상기 입구를 통해 유입된 공기가 회전 소용돌이(vortex)를 형성하는 챔버와, 상기 챔버에서 회전소용돌이를 형성하는 공기가 음향에너지를 발생시키면서 수중으로 공급하는 출구로 구성되는 것을 특징으로 하는 음향 공진을 이용한 산기장치.A chamber in which the air enters and a chamber in which the air introduced through the inlet forms a rotating vortex and an outlet through which the air forming the rotating vortex in the chamber generates an acoustic energy and supplies it to the water A sound generator using acoustic resonance. 제1항에 있어서, 상기 챔버의 상부직경(d2)은 하부직경(d1)보다 작음을 특징으로 하는 음향 공진을 이용한 산기장치.The apparatus of claim 1, wherein the upper diameter (d2) of the chamber is smaller than the lower diameter (d1). 제1항 또는 제2항에 있어서, 상기 챔버의 높이(h)/하부직경(d1)은 0.5-2이고, 챔버의 하부직경(d1)/입구직경(d3)은 5-8인 것을 특징으로 하는 음향공진을 이용한 산기장치.3. The method according to claim 1 or 2, wherein the height (h) / the lower diameter (d1) of the chamber is 0.5-2 and the lower diameter (d1) / inlet diameter (d3) A sound generator using acoustic resonance. 제1항 또는 제2항에 있어서, 공진 주파수가 2000-3000Hz인 것을 특징으로 하는 음향공진을 이용한 산기장치.3. The apparatus according to claim 1 or 2, wherein the resonance frequency is 2000-3000 Hz. 제1항 또는 제2항에 있어서, 상기 공기는 산소인 것을 특징으로 하는 음향공진을 이용한 산기장치.The apparatus according to claim 1 or 2, wherein the air is oxygen.
KR1019960048193A 1996-10-25 1996-10-25 Aeration device using acoustic resonance Expired - Lifetime KR100206746B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960048193A KR100206746B1 (en) 1996-10-25 1996-10-25 Aeration device using acoustic resonance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960048193A KR100206746B1 (en) 1996-10-25 1996-10-25 Aeration device using acoustic resonance

Publications (2)

Publication Number Publication Date
KR19980028981A KR19980028981A (en) 1998-07-15
KR100206746B1 true KR100206746B1 (en) 1999-07-01

Family

ID=19478867

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960048193A Expired - Lifetime KR100206746B1 (en) 1996-10-25 1996-10-25 Aeration device using acoustic resonance

Country Status (1)

Country Link
KR (1) KR100206746B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100289230B1 (en) * 1998-07-29 2001-05-02 최태원 Acoustic resonance gas dissolving device with spiral guide groove formed inside chamber
KR100551982B1 (en) * 2004-05-27 2006-02-20 고등기술연구원연구조합 Air diffuser with nozzle throat

Also Published As

Publication number Publication date
KR19980028981A (en) 1998-07-15

Similar Documents

Publication Publication Date Title
US4290885A (en) Aeration device
JP4802154B2 (en) Ultrafine bubble generator
JP3291623B2 (en) Gas-liquid mixing device
WO2019037470A1 (en) Microbubble generator
US4224158A (en) Aeration system and method with tapered nozzle
KR20170127260A (en) Apparatus for producing micro bubbles by using a venturi pipe with porous tube therein
US8967597B2 (en) Device for mixing gas into a flowing liquid
JP5188997B2 (en) Aeration stirrer
CN114917781A (en) Bubble smashing and refining device and faucet
JP2002301345A (en) Bubble water manufacturing apparatus
JP2004024931A (en) Gas-liquid mixing apparatus for generating fine bubble in large quantity
KR100206746B1 (en) Aeration device using acoustic resonance
JP3314758B2 (en) Gas-liquid separation device
KR101920919B1 (en) Micro bubble generating device for farm
JP3747261B2 (en) Dispersion method of gas-liquid mixed fluid and dispersion device used in the method
JPH06510235A (en) reactor
WO2024120105A1 (en) Air suction protection structure of microbubble device
JPS60114331A (en) Gas liquid mixing apparatus
JP2004000897A (en) Apparatus for generating minute bubble
KR100635382B1 (en) Orifice diffuser
KR100223986B1 (en) Diffuser using rotatory force and sound resonance
JP3316392B2 (en) Underwater aeration equipment
CN219308568U (en) Air suction protection structure of micro-bubble device
EP0602762A1 (en) Apparatus for dissolving gas in a liquid
KR100503679B1 (en) Air diffuser with two acoustic resonators

Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19961025

A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 19970602

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 19961025

Comment text: Patent Application

PG1501 Laying open of application
E701 Decision to grant or registration of patent right
PE0701 Decision of registration

Patent event code: PE07011S01D

Comment text: Decision to Grant Registration

Patent event date: 19990226

GRNT Written decision to grant
PR0701 Registration of establishment

Comment text: Registration of Establishment

Patent event date: 19990409

Patent event code: PR07011E01D

PR1002 Payment of registration fee

Payment date: 19990410

End annual number: 3

Start annual number: 1

PG1601 Publication of registration
PR1001 Payment of annual fee

Payment date: 20020110

Start annual number: 4

End annual number: 4

PR1001 Payment of annual fee

Payment date: 20030402

Start annual number: 5

End annual number: 5

PR1001 Payment of annual fee

Payment date: 20040209

Start annual number: 6

End annual number: 6

PR1001 Payment of annual fee

Payment date: 20050408

Start annual number: 7

End annual number: 7

PR1001 Payment of annual fee

Payment date: 20060316

Start annual number: 8

End annual number: 8

PR1001 Payment of annual fee

Payment date: 20070406

Start annual number: 9

End annual number: 9

PR1001 Payment of annual fee

Payment date: 20080410

Start annual number: 10

End annual number: 10

PR1001 Payment of annual fee

Payment date: 20090406

Start annual number: 11

End annual number: 11

PR1001 Payment of annual fee

Payment date: 20100405

Start annual number: 12

End annual number: 12

PR1001 Payment of annual fee

Payment date: 20110406

Start annual number: 13

End annual number: 13

PR1001 Payment of annual fee

Payment date: 20120405

Start annual number: 14

End annual number: 14

FPAY Annual fee payment

Payment date: 20130404

Year of fee payment: 15

PR1001 Payment of annual fee

Payment date: 20130404

Start annual number: 15

End annual number: 15

FPAY Annual fee payment

Payment date: 20140403

Year of fee payment: 16

PR1001 Payment of annual fee

Payment date: 20140403

Start annual number: 16

End annual number: 16

PR1001 Payment of annual fee

Payment date: 20150402

Start annual number: 17

End annual number: 17

FPAY Annual fee payment

Payment date: 20160406

Year of fee payment: 18

PR1001 Payment of annual fee

Payment date: 20160406

Start annual number: 18

End annual number: 18

EXPY Expiration of term
PC1801 Expiration of term