JP3111759U - Fountain nozzle - Google Patents

Fountain nozzle Download PDF

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JP3111759U
JP3111759U JP2005001613U JP2005001613U JP3111759U JP 3111759 U JP3111759 U JP 3111759U JP 2005001613 U JP2005001613 U JP 2005001613U JP 2005001613 U JP2005001613 U JP 2005001613U JP 3111759 U JP3111759 U JP 3111759U
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nozzle
nozzle member
main body
guide
annular
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征一郎 国藤
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征一郎 国藤
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Abstract

【課題】 エゼクターを利用した高増幅率、かつ低騒音型の噴気ノズルを提供することにある。
【解決手段】 ノズル部材10の案内部12をほぼ円弧状断面の丸縁に形成すると共に、案内面12cを断面が円弧状または放物線のラッパ型に形成したことを特徴とする。
【選択図】 図1
PROBLEM TO BE SOLVED: To provide a high amplification factor and low noise type jet nozzle using an ejector.
SOLUTION: A guide portion 12 of a nozzle member 10 is formed in a rounded edge having a substantially arc-shaped cross section, and a guide surface 12c is formed in a trumpet shape having a circular cross section or a parabola.
[Selection] Figure 1

Description

本考案は、粉塵,切屑,水滴,繊維屑,ガス,煙等の除去、あるいは乾燥、冷却等に使用する噴気流を発生させるための噴気ノズルに関するものであり、詳しくはエゼクターにより少量の加圧気体の供給のもとに効率よく増幅して多量の噴気流を発生させるための噴気ノズルに関するものである。  The present invention relates to a jet nozzle for generating a jet stream used to remove dust, chips, water droplets, fiber scraps, gas, smoke, etc., or to dry or cool. Specifically, a small amount of pressure is applied by an ejector. The present invention relates to a fusible nozzle for efficiently amplifying under a gas supply and generating a large amount of a jet stream.

従来のこの種噴気ノズルとしては、噴出口がある筒状のノズル部材と二次気体流入口がある筒状の主体とを両者の螺合により同一軸線関係のもとに進退調節することができるように設けるほか、主体の内方には段部とこれに対向する案内部とにより形成される斜め内向きの環状一次気体噴射口をノズル部材の進退動により縮拡する状態に前向きに設け、かつこの噴射口に連通するように一次気体の流入室および供給管を設け、供給管から圧縮一次気体を供給しつつ、流入口からエゼクター作用により二次気体を吸引随伴して噴出口から増量した気体を噴出するようにした噴気ノズルがある。(例えば特許文献1参照)  As this type of conventional nozzle, a cylindrical nozzle member having a jet port and a cylindrical main body having a secondary gas inlet can be advanced / retracted with the same axial relationship by screwing them together. In addition to the above, the inside of the main body is provided with an obliquely inward annular primary gas injection port formed by a stepped portion and a guide portion opposed thereto in a state of expanding and contracting forward and backward by the movement of the nozzle member, In addition, an inflow chamber and a supply pipe for the primary gas are provided so as to communicate with the injection port, and the compressed primary gas is supplied from the supply pipe, and the secondary gas is sucked from the injection port by the ejector action and increased from the injection port. There is a fusible nozzle that ejects gas. (For example, see Patent Document 1)

実公平3−12355公報  No. 3-12355

この種の噴気ノズルの製作に当たっては、各部材の軸心の一致,寸法,仕上げ面等において高精度が要求されるが、特に環状一次気体噴射口の隘路部分の形成が増幅効果に重要な要件であるばかりでなく、騒音発生に影響を及ぼすことが判った。上記従来技術によれば、ノズル部材の後端部は、その断面形状が特許文献1の第2図,第3図のように単に稜線に近い丸みが形成されており、かつ後端部に近い下流内面は、角度の異なる2段階のテーパー面が形成されている関係上、増速されて軸心方向へ指向される気流に渦流が生じ易いから、一次気体が中空円錐状の整流,層流を形成し難い欠点があり、従って二次気体の吸引作用即ち増幅効果が不充分となるほか、騒音の発生も著しい。またノズル部材における後端部分は比較的尖鋭である関係上、取扱い上および異物の詰まりに起因して損傷を受け易いから、これが隘路に不均斉をもたらして円錐状の一次気体噴射に乱れが生じ、これにより二次気体の吸引作用即ち増幅効果が低下することになる。しかも均一製品の多量生産上不向きである。  When manufacturing this type of jet nozzle, high precision is required in terms of the alignment, dimensions, and finish of the axis of each member. In particular, the formation of the bottleneck portion of the annular primary gas injection port is an important requirement for the amplification effect. In addition to this, it has been found that it affects noise generation. According to the above prior art, the rear end portion of the nozzle member has a cross-sectional shape that is simply rounded like a ridge line as shown in FIGS. 2 and 3 of Patent Document 1, and is close to the rear end portion. Since the downstream inner surface is formed with two stages of tapered surfaces with different angles, vortex flow is likely to occur in the airflow that is accelerated and directed in the axial direction. Therefore, the secondary gas sucking action, that is, the amplification effect becomes insufficient, and noise is generated significantly. In addition, the rear end portion of the nozzle member is relatively sharp and easily damaged due to handling and clogging of foreign matter. This causes unevenness in the bottleneck and disrupts the conical primary gas injection. As a result, the suction action or amplification effect of the secondary gas is reduced. Moreover, it is not suitable for mass production of uniform products.

そこで本考案の目的は、環状一次気体噴射口から軸心方向へ指向する一次気体がラッパ状の整流を形成するような流路の形状,寸法等の条件を規定するものであって、取扱い上および異物の詰まりに起因する損傷を受け難い形状とし、流路を安定的に確保することができるようにした噴気ノズルを提供することにあり、また他の目的は高増幅率かつ低騒音の噴気ノズルを提供することにある。更に切削加工についても簡単化することにある。  Therefore, an object of the present invention is to define conditions such as the shape and size of the flow path so that the primary gas directed in the axial direction from the annular primary gas injection port forms a trumpet-like rectification. The object of the present invention is to provide a jet nozzle that has a shape that is not easily damaged by clogging of foreign substances and that can stably secure a flow path. It is to provide a nozzle. Furthermore, it is to simplify the cutting process.

上記目的を達成するため、請求項1の考案は、前記特許文献1における型式のエゼクター利用増幅型の噴気ノズルにおいて、ノズル部材の後端突縁部をほぼ円弧状断面の丸縁に形成すると共に、後端突縁部に連接する案内面はこれを断面が円弧状または放物線のラッパ型に形成したことを特徴とする。  In order to achieve the above object, the invention of claim 1 is based on the ejector-use amplifying type fusible nozzle of the type disclosed in Patent Document 1, and the rear end projecting edge of the nozzle member is formed in a round edge having a substantially arc-shaped cross section. The guide surface connected to the rear end protruding edge portion is characterized in that the cross section is formed in a trumpet shape having a circular arc shape or a parabola.

請求項2の考案は、ノズル部材における突縁部の後端部に、主体の段部に平行で狭幅な環状面を形成して、段部と環状面とにより軸線に直角なスリット状の隘路を構成するようにしたことを特徴とする請求項1に記載の噴気ノズルであり、また請求項3の考案は、環状面の幅を0.6mm以下に選定し、かつ突縁部における外周隅角部に0.25mm以上のアールを付与した請求項2に記載の噴気ノズルである。  In the invention of claim 2, a narrow annular surface parallel to the main step portion is formed at the rear end portion of the protruding portion of the nozzle member, and a slit-like shape perpendicular to the axis is formed by the step portion and the annular surface. The fusible nozzle according to claim 1, characterized in that it constitutes a bottleneck, and the device of claim 3 selects the width of the annular surface to be 0.6 mm or less, and the outer periphery of the protruding portion. It is a fusible nozzle of Claim 2 which gave a round of 0.25 mm or more to a corner part.

上記構成のもとに、コンプレッサー等の加圧気体源に接続した一次気体供給管7に例えば2〜8Kgf/cmGの加圧気体を流入室5に供給することにより、流入室5内において均斉化した状態のもとに環状一次気体噴射口13から増速した前向きのほぼ円錐状のジェット気流を噴射し、従ってこの一次気体の噴射に伴うエゼクター作用により流入口2から多量の二次気体を吸引随伴して噴出口8から前方へ噴出することができるのである。In the inflow chamber 5, for example, by supplying a pressurized gas of 2 to 8 kgf / cm 2 G to the inflow chamber 5 to the primary gas supply pipe 7 connected to a pressurized gas source such as a compressor based on the above configuration. A forward substantially conical jet stream accelerated from the annular primary gas injection port 13 is injected under the homogenized state. Therefore, a large amount of secondary gas is injected from the inlet 2 by the ejector action accompanying the injection of the primary gas. Can be ejected forward from the ejection port 8 with suction.

請求項1の考案によれば、ノズル部材10の後端突縁部をほぼ円弧状断面の丸縁に形成すると共に、案内面12を断面が円弧状または放物線のラッパ型に形成したことにより、流入室5から噴射口13への方向転換する流路の流通抵抗並びに案内面12の流通抵抗を低減して圧力損失を低下し、これにより乱流の発生を抑制してエゼクターによる増幅率を向上し、騒音の発生を著しく低減することができ、2段階のテーパー面の製作二工程を一工程に省略することができ、しかも後端突縁部が丸縁であることは、尖鋭な場合に比較して取扱上その他において損傷を受け難い利点がある。請求項2の考案によれば、ノズル部材10における後端突縁部に、主体1における段部4に平行で狭幅な環状面12bを形成して、段部4と環状面12bとにより軸線に直角なスリット状の隘路を構成することにより、単に隘路を形成する場合と異なり、平行面に挟まれた隘路であり、かつ隘路に隣接する上流および下流は流通断面積の変化が比較的緩やかな形状である関係上、渦流の発生が少なく、層流傾向の円錐状のジェット気流を噴射することになり、増幅率の向上と騒音の低減が得られ、また請求項3の考案によれば、請求項1および2の考案の効果に加え、各部の形状および寸法の特定により、増幅率は25倍以上が得られ、かつ推進力は5倍を得ることができた。  According to the invention of claim 1, the rear end protruding edge portion of the nozzle member 10 is formed in a round edge having a substantially arc-shaped cross section, and the guide surface 12 is formed in a trumpet shape having a circular arc shape or a parabolic cross section. The flow resistance from the inflow chamber 5 to the injection port 13 and the flow resistance of the guide surface 12 are reduced to reduce the pressure loss, thereby suppressing the occurrence of turbulent flow and improving the amplification factor by the ejector. In addition, noise generation can be significantly reduced, two steps of taper surface fabrication can be omitted in one step, and the rear edge protrusion is rounded. In comparison, there is an advantage that it is less likely to be damaged in handling. According to the second aspect of the present invention, the narrow end annular surface 12b parallel to the stepped portion 4 of the main body 1 is formed on the rear end protruding edge portion of the nozzle member 10, and the axis line is formed by the stepped portion 4 and the annular surface 12b. Unlike the simple formation of a bottleneck, a slit-like bottleneck that is perpendicular to the plane is a bottleneck that is sandwiched between parallel planes, and changes in the cross-sectional area of the upstream and downstream adjacent to the bottleneck are relatively gradual. Due to the simple shape, eddy currents are less likely to be generated, and a conical jet stream with a laminar flow tendency is injected, resulting in an improvement in amplification factor and a reduction in noise. In addition to the effects of the inventions of claims 1 and 2, by specifying the shape and dimensions of each part, an amplification factor of 25 times or more and a driving force of 5 times were obtained.

以下、本考案を図示の実施形態について詳細に説明する。本考案の適用対象としての噴気ノズルとしては、例えば図1に示すように、円筒状の主体1の内周面に、後端から前方へ漸次狭縮するテーパー状二次気体流入口2と、スロート部3と、軸線と直角な前向き段部4と、スロート部3よりも大径な一次気体流入室5と、雌ねじ部6とを順次に形成するほか、前記流入室5に連通する一次気体供給管7を直角関係に螺着接続し、かつこのような主体1に対し、前端に噴出口8があるほか後端には前記スロート部3よりも大径な流入口部9があるほぼ円筒状のノズル部材10をその外周中央付近に刻設した雌ねじ部11において前記主体1の前方から雌ねじ部6に同一軸線関係に螺挿して流入口2から噴出口8に通じる前後方向の流路を形成するばかりでなく、ノズル部材10における流入口部9の後端寄りには前方に漸次狭縮する案内部12を設けて、この案内部12と主体1における段部4との間に斜め内向きの環状一次気体噴射口13が形成されるようにし、更にノズル部材10の後端寄り外周の環状溝14による一次気体流入室5において一次気体供給管7からの供給気体を平均化した状態のもとに噴射口13に供給するようにし、なお前記ノズル部材10の前端寄り部分には外周にローレット切りを施したハンドル15を設けるほか、その後方には外周にローレット切りを施したロックナット16を雄ねじ部11に螺嵌して設け、かつ主体1に対するノズル部材10の進退調節即ち一次気体噴射口13の間隙の度合を視認することができるように、主体1における前端寄り外周部に複数の目盛り17を等角度関係のもとに施すと共に、これに対する指標18をノズル部材10におけるハンドル15の外周に施し、なお主体1とノズル部材10との摺動部の適宜位置に気密保持用のOリング19を介設した型式を採択するのが適当である。  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. For example, as shown in FIG. 1, as a fusible nozzle as an application target of the present invention, a tapered secondary gas inlet 2 that gradually narrows forward from the rear end to the inner peripheral surface of a cylindrical main body 1; In addition to sequentially forming a throat portion 3, a forward-facing step portion 4 perpendicular to the axis, a primary gas inflow chamber 5 having a larger diameter than the throat portion 3, and a female screw portion 6, a primary gas communicating with the inflow chamber 5 is formed. The supply pipe 7 is screwed and connected at a right angle, and the main body 1 has a jet port 8 at the front end and an inflow port portion 9 larger in diameter than the throat portion 3 at the rear end. In a female threaded portion 11 in which a cylindrical nozzle member 10 is engraved in the vicinity of the center of its outer periphery, a flow path in the front-rear direction leading from the front of the main body 1 to the female threaded portion 6 in the same axial relationship and leading from the inlet 2 to the outlet 8 is formed. In addition to forming, the inlet 9 of the nozzle member 10 A guide portion 12 that gradually narrows forward is provided near the end so that an obliquely inward annular primary gas injection port 13 is formed between the guide portion 12 and the step portion 4 of the main body 1. In the primary gas inflow chamber 5 formed by the annular groove 14 on the outer periphery near the rear end of the nozzle member 10, the supply gas from the primary gas supply pipe 7 is supplied to the injection port 13 in an averaged state. 10 is provided with a handle 15 having a knurled cut on the outer periphery at a portion near the front end, and a lock nut 16 having a knurled cut on the outer periphery is screwed into the male screw portion 11 at the rear thereof, and a nozzle for the main body 1 When a plurality of scales 17 are applied to the outer peripheral portion near the front end of the main body 1 in an equiangular relationship so that the advance / retreat adjustment of the member 10, that is, the degree of the gap of the primary gas injection port 13 can be visually confirmed. In addition, a model in which an index 18 is provided on the outer periphery of the handle 15 of the nozzle member 10 and an O-ring 19 for airtightness is provided at an appropriate position of the sliding portion between the main body 1 and the nozzle member 10 is adopted. Is appropriate.

上記型式の噴気ノズルに対する本考案の特殊構成としては、ノズル部材10における案内部12について、図1に示すように、ノズル部材10の後端突縁部をほぼ円弧状断面の丸縁に形成するのであるが、この後端突縁部はアール付隅角部12aと、隅角部12aに連続する状態のもとに主体1における段部4に平行で狭幅な環状面12bと、断面が円弧状または放物線で環状面12bに連接する状態のもとに形成したラッパ状案内面12cとにより形成し、これにより一次気体の流速を増速するほか、隘路に近い上下流の流通抵抗を低減して加圧気体の圧力損失を極力抑制し、増幅率を向上すると同時に騒音を低減するのである。  As a special configuration of the present invention for the above-described type of jet nozzle, as shown in FIG. 1, the rear end projecting edge portion of the nozzle member 10 is formed in a round edge having a substantially arc-shaped cross section. However, the trailing edge of this rear end has a rounded corner 12a, an annular surface 12b parallel to the step 4 of the main body 1 in a state continuous to the corner 12a, and a cross section. It is formed by a trumpet-shaped guide surface 12c formed under the state of being connected to the annular surface 12b by an arc shape or a parabola, thereby increasing the flow velocity of the primary gas and reducing the upstream and downstream flow resistance close to the bottleneck. Thus, the pressure loss of the pressurized gas is suppressed as much as possible to improve the amplification factor and simultaneously reduce the noise.

本考案の噴気ノズルの寸法としては、噴出口8の直径が4〜20mmのものが多用されるが、38mmまでの種々のものが使用される。従って、前記アール付隅角部12aのアール,環状面12bの幅,ラッパ状案内面12cの曲率半径等は、噴気ノズルの大きさ即ち噴出口8の大きさに応じて適切に変更することが重要であるが、アール付隅角部12aの半径については0.25mm以上がよく、0.5mm程度が適当であり、環状面12bの幅については過大であると摩擦損失が増加し、過小であるとオリフィス効果が作用して流通抵抗が増加する関係上、適切な幅を選定することが重要であり、種々実施した結果、実用範囲は0.2〜0.6mmで、望ましくは0.3〜0.5mmである。また、ラッパ状案内面12cの曲率半径については、環状面12bとスムーズに連接して適度に大きいことが望ましく、半径3〜5mmが適当である。  As the size of the jet nozzle of the present invention, those having a diameter of the ejection port 8 of 4 to 20 mm are frequently used, but various types up to 38 mm are used. Accordingly, the radius of the rounded corner portion 12a, the width of the annular surface 12b, the radius of curvature of the trumpet-shaped guide surface 12c, and the like can be appropriately changed according to the size of the jet nozzle, that is, the size of the jet port 8. Although it is important, the radius of the corner portion 12a with the radius is preferably 0.25 mm or more, and about 0.5 mm is appropriate, and if the width of the annular surface 12b is excessive, the friction loss increases and is excessively small. In some cases, it is important to select an appropriate width because the orifice effect acts to increase the flow resistance. As a result of various implementations, the practical range is 0.2 to 0.6 mm, preferably 0.3. ~ 0.5 mm. In addition, the radius of curvature of the trumpet-shaped guide surface 12c is desirably moderately large by smoothly connecting to the annular surface 12b, and a radius of 3 to 5 mm is appropriate.

なお、段部4と環状面12bとによる隘路の厚みは、0〜0.1mm程度のもとに使用する関係上、製作に当たっては全周にわたって均一な厚みに保たれるように、高精度に仕上げることが極めて重要である。  In addition, the thickness of the bottleneck by the step part 4 and the annular surface 12b is highly accurate so that the thickness is kept uniform over the entire circumference because of the use of about 0 to 0.1 mm. Finishing is extremely important.

本考案の噴気ノズルの一実施形態を示す縦断側面図である。  It is a vertical side view which shows one Embodiment of the fusible nozzle of this invention. 図1の噴気ノズルの斜面図である。  It is a slope view of the fusible nozzle of FIG. 噴射口を拡開した状態の要部を拡大して示す縦断側面図である。  It is a vertical side view which expands and shows the principal part of the state which expanded the injection nozzle.

符号の説明Explanation of symbols

1 主体
2 二次気体流入口
4 段部
5 流入室
6 ねじ部
7 供給管
8 噴出口
10 ノズル部材
11 ねじ部
12 案内部
12a アール付隅角部
12b 環状面
12c 案内面
13 一次気体噴射口
16 ロックナット
DESCRIPTION OF SYMBOLS 1 Main body 2 Secondary gas inflow port 4 Step part 5 Inflow chamber 6 Screw part 7 Supply pipe 8 Jet port 10 Nozzle member 11 Screw part 12 Guide part 12a Earl corner part 12b Annular surface 12c Guide surface 13 Primary gas injection port 16 Lock nut

Claims (3)

噴出口(8)がある筒状のノズル部材(10)と二次気体流入口(2)がある筒状の主体(1)とを両者の雄ねじ部(11),雌ねじ部(6)の螺合により同一軸線関係のもとに進退調節することができるように設けるほか、主体(1)の内部には軸線に直角な段部(4)を設けると共に、これに対しノズル部材(10)の後端には前記段部(4)に対向する案内部(12)とこの案内部(12)に連続する状態のもとに前方に漸次狭縮する案内面(12c)とを形成し、これら段部(4),案内部(12),案内面(12c)により斜め内向きの環状一次気体噴射口(13)を前向きに形成し、前記主体(1)に対するノズル部材(10)の進退動により環状一次気体噴射口(13)を縮拡することができるようにし、かつこの噴射口(13)に連通するように一次気体の流入室(5)および供給管(7)を設け、更に前記主体(1)とノズル部材(10)との進退位置固定用のロックナット(16)を前記ねじ部(11)に螺着してなる噴気ノズルであって、前記ノズル部材(10)の案内部(12)をほぼ円弧状断面の丸縁に形成すると共に、案内面(12c)はこれを断面が円弧状または放物線のラッパ型に形成したことを特徴とする噴気ノズル。  A cylindrical nozzle member (10) having a jet port (8) and a cylindrical main body (1) having a secondary gas inflow port (2) are screwed into the male screw portion (11) and the female screw portion (6). The main body (1) is provided with a step (4) perpendicular to the axis, and the nozzle member (10) is provided with a step (4). The rear end is formed with a guide portion (12) facing the step portion (4) and a guide surface (12c) gradually narrowing forward in a state continuous with the guide portion (12). The stepped portion (4), the guide portion (12), and the guide surface (12c) form an obliquely inwardly-circular annular primary gas injection port (13) forward, and the nozzle member (10) moves forward and backward with respect to the main body (1). The annular primary gas injection port (13) can be expanded and contracted by the injection port (1). The primary gas inflow chamber (5) and the supply pipe (7) are provided so as to communicate with each other), and a lock nut (16) for fixing the advancing / retreating position between the main body (1) and the nozzle member (10) is further attached to the screw. An air jet nozzle screwed to the portion (11), wherein the guide portion (12) of the nozzle member (10) is formed to have a substantially arc-shaped cross-section, and the guide surface (12c) A fusible nozzle characterized by being formed into a circular arc or parabolic trumpet shape. ノズル部材(10)における案内部(12)の後端部に、主体(1)の段部(4)に平行で狭幅な環状面(12b)を形成して、段部(4)と環状面(12b)とにより軸線に直角なスリット状の隘路を構成するようにしたことを特徴とする請求項1に記載の噴気ノズル。  A narrow annular surface (12b) parallel to the step portion (4) of the main body (1) is formed at the rear end portion of the guide portion (12) in the nozzle member (10), and the step portion (4) and the annular portion are annularly formed. The fusible nozzle according to claim 1, wherein a slit-like bottleneck perpendicular to the axis is formed by the surface (12 b). 環状面(12b)の幅を0.6mm以下に選定し、かつ案内部(12)におけるアール付隅角部(12a)のアールを0.25mm以上に選定した請求項2に記載の噴気ノズル。  The fusible nozzle according to claim 2, wherein the width of the annular surface (12b) is selected to be 0.6 mm or less, and the radius of the corner portion with radius (12a) in the guide portion (12) is selected to be 0.25 mm or more.
JP2005001613U 2005-03-03 2005-03-03 Fountain nozzle Expired - Lifetime JP3111759U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005001613U JP3111759U (en) 2005-03-03 2005-03-03 Fountain nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005001613U JP3111759U (en) 2005-03-03 2005-03-03 Fountain nozzle

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JP3111759U true JP3111759U (en) 2005-07-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005001613U Expired - Lifetime JP3111759U (en) 2005-03-03 2005-03-03 Fountain nozzle

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012035334A (en) * 2010-08-03 2012-02-23 Nippon Steel Corp Gas blowing device
KR102065569B1 (en) * 2019-08-16 2020-01-13 나명환 An air amplification apparatus for kitchen range hood

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012035334A (en) * 2010-08-03 2012-02-23 Nippon Steel Corp Gas blowing device
KR102065569B1 (en) * 2019-08-16 2020-01-13 나명환 An air amplification apparatus for kitchen range hood

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