WO2013073336A1 - Dispositif d'atomisation de liquide - Google Patents

Dispositif d'atomisation de liquide Download PDF

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Publication number
WO2013073336A1
WO2013073336A1 PCT/JP2012/077077 JP2012077077W WO2013073336A1 WO 2013073336 A1 WO2013073336 A1 WO 2013073336A1 JP 2012077077 W JP2012077077 W JP 2012077077W WO 2013073336 A1 WO2013073336 A1 WO 2013073336A1
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WO
WIPO (PCT)
Prior art keywords
liquid
gas
flow
spray
mist
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Application number
PCT/JP2012/077077
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English (en)
Japanese (ja)
Inventor
博良 麻川
良太 久下
Original Assignee
ノズルネットワーク株式会社
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Filing date
Publication date
Application filed by ノズルネットワーク株式会社 filed Critical ノズルネットワーク株式会社
Publication of WO2013073336A1 publication Critical patent/WO2013073336A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0861—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with one single jet constituted by a liquid or a mixture containing a liquid and several gas jets

Definitions

  • the present invention relates to a liquid atomizing apparatus for atomizing a liquid.
  • Conventional atomization techniques include gas-liquid mixing type (two-fluid type), ultrasonic type, ultra-high pressure type (100 MPa to 300 MPa), and evaporation type.
  • a general two-fluid nozzle injects gas and a liquid in the same injection direction, and refines
  • a spray nozzle device for generating fine particle mist is known (Patent Document 1).
  • This spray nozzle device has a first nozzle part and a second nozzle part, and can collide the spray liquid from the first nozzle part with the spray liquid from the second nozzle part to form a fine particle mist.
  • the spray is not low speed spray or low energy spray, and is not suitable for further downsizing.
  • An object of the present invention is to provide a liquid atomizing apparatus capable of atomizing a liquid with a low-speed spraying, low energy, and a simple apparatus configuration using a novel principle different from the above-described conventional miniaturization principle. .
  • the liquid atomizing device of the present invention includes a liquid ejecting unit for ejecting a liquid flow, A first gas injection unit and a second gas injection unit for injecting a gas flow in order to cause two gas flows to collide with the liquid flow;
  • the liquid flow ejected from the liquid ejecting section collides with the gas flow ejected from the first gas ejecting section and the gas flow ejected from the second gas ejecting section to form two liquid columns, and
  • a gas-liquid mixing area that is an area for atomizing the liquid;
  • the gas-liquid mixing area part has a spray outlet part formed therein, The two liquid columns and the atomized mist are sprayed from the spray outlet.
  • FIGS. 1A to 1F Two liquid columns 63 and 64 are formed by causing the gas flows 11 and 21 ejected from the first and second gas ejecting units 1 and 2 to collide with the liquid stream 61 ejected from the liquid ejecting unit 6.
  • the fog 62 is generated (FIGS. 1A and 1B).
  • FIG. 1C shows one liquid column in a state where only the liquid flow 61 is ejected. In this state, two gas streams that collide with each other are caused to collide with the liquid column.
  • one liquid column is separated (vertically divided) to form two liquid columns, and the liquid in the central portion of the liquid column is refined, and the mist 62 (FIGS. 1A and 1D).
  • this liquid film is broken and refined.
  • one liquid column is made into a small diameter, a liquid film will also become thin and the particle
  • a thin film can be formed with a low energy (low pressure, low flow rate) gas flow, unlike the conventional high-speed air flow refinement principle by shearing force. It helps to make the mist into the atmosphere at low speed.
  • the width d1 of the liquid flow 61 with which the gas flows 11 and 21 collide is preferably smaller than the width d2 of the gas flow.
  • the width d2 (or diameter) (d2 / d1) of the gas flow is, for example, in the range of 0.1 to 0.9 with respect to the width d1 (or diameter) of the liquid flow.
  • it is 0.3 to 0.8, and more preferably 0.4 to 0.7.
  • the liquid film becomes thinner as the liquid flow width d1 is smaller, the effect of miniaturization becomes higher.
  • the pressure Pw (MPa) (Pw / Pa) of the liquid flow is in the range of 0.1 to 1.5 (the pressure balance region of the gas and liquid) with respect to the pressure Pa (MPa) of the two gas flows. ), Preferably 0.3 to 1.0, more preferably 0.4 to 0.8. Outside the range of 0.1 to 1.5, the two liquid columns are not formed, or even if two liquid columns are formed, the mist is in a finer state.
  • the pressure Pa (MPa) of the gas flow is, for example, in the range of 0.005 to 0.05, preferably 0.008 to 0.040, more preferably 0.010 to 0.035.
  • the gas pressure (gas flow rate) is increased, atomization tends to occur.
  • the mist is reversed. Tends to coarsen.
  • the pressures of the two gas streams are preferably set to be the same or substantially the same, and the flow rates are preferably set to be the same or substantially the same.
  • the cross-sectional shape of the gas flow injected from the gas injection unit is not particularly limited, and examples thereof include a circular shape, an elliptical shape, a rectangular shape, and a polygonal shape.
  • the cross-sectional shape of the gas flow depends on the orifice cross-section of the gas injection unit.
  • the pressure and flow rate of the liquid (liquid flow) ejected from the liquid ejecting unit are not particularly limited, the low pressure and low flow rate liquid can be suitably atomized by the atomization principle of the present invention.
  • the pressure of the liquid ejecting unit may be a water pressure of a general water pipe, and the liquid ejecting unit may be a device that naturally drops the liquid.
  • the “liquid ejected from the liquid ejecting section” includes a liquid that falls at a natural fall speed. The cross-sectional shape of the liquid flow depends on the orifice cross-section of the liquid ejecting unit.
  • FIG. 1A an area where the mist 62 and the two liquid columns 63 and 64 are generated is indicated by a broken line as a gas-liquid mixing area 120.
  • the spray direction of the mist 62 is restricted by the spray outlet 30 surrounding the periphery of the mist 62.
  • the spray outlet part 30 may be formed integrally with a member (gas injection part 1, 2) for forming a gas orifice, or may be formed by a separate member.
  • FIG. 2 is a front view of the spray outlet 30.
  • the tip 6a tip orifice
  • gas orifices 1a and 2a having a width smaller than the orifice diameter are shown as broken lines.
  • a spray pattern of fog for example, it is formed in a wide fan shape, and its cross-sectional shape is elliptical or oval. Parallel to the collision surface where the gas flows collide (in the direction in which the collision surface expands), the gas that collided (after the collision) diffuses, and the mist 62 spreads in a fan shape and is ejected in this direction.
  • the spray angle ⁇ of the mist 62 is, for example, 20 ° to 90 ° (FIG. 1B).
  • an intersection angle between an injection direction axis of the first gas injection unit and an injection direction axis of the second gas injection unit is in a range of 90 ° to 180 °.
  • the angle ranges in which the respective injection direction axes of the first gas injection unit 1 and the second gas injection unit 2 intersect are the gas injected from the first gas injection unit 1 and the gas injected from the second gas injection unit 2.
  • the collision angle ⁇ is 90 ° to 220 °, preferably 90 ° to 180 °, and more preferably 110 ° to 180 °.
  • FIG. 3 shows the collision angle ⁇ .
  • the larger the collision angle the more the ejected gas and the gas that has collided and spread are ejected. It tends to push the liquid back and cause the liquid to flow backward.
  • the injection direction of the first gas injection unit and the injection direction of the second gas injection unit face each other, the injection direction axis of the first gas injection unit and the injection direction axis of the second gas injection unit, There is a form that is consistent. This means that the collision angle ⁇ between the gas injected from the first gas injection unit and the gas injected from the second gas injection unit is 180 °, and the injection direction axes coincide.
  • a cover main body for guiding and atomizing the mist sprayed from the spray outlet portion along the spray axis direction of the liquid jet section
  • the cover main body includes a cover An air intake section that allows air to flow inside and outside the main body, an opening that is smaller than the circular inner diameter of the cover body and that guides the mist upward through the opening, and the mist that has passed through the opening And a receiving tray for receiving the liquid remaining in the cover main body. The liquid in the two liquid columns does not go out of the apparatus through the opening.
  • the two liquid columns can be separated from the mist and stored in the tray, and the mist can be further refined and sprayed to the outside of the apparatus at a low speed. Since low-speed spraying is possible, it is possible to reduce mist from adhering to the wall surface inside the cover portion and forming droplets. Further, further miniaturization is promoted and the liquid can be reused. Further, in order to reduce the amount of mist adhering to the inner wall surface of the cover body, the spray angle ⁇ is preferably set to 20 ° to 40 °.
  • the said cover main body is the 3rd cover part which has the 1st cover part, the 2nd cover part which has the said air intake part, the said opening part, and the said nozzle part from the side near the said spray outlet part. It is preferable to have. Accordingly, the cover body can be configured with a small number of simple parts that can be mass-produced and a small number of parts.
  • a 1st cover part and a 2nd cover part may be comprised by a single member, and may be comprised and connected by another member.
  • a 2nd cover part and a 3rd cover part may be comprised by a single member, and may be comprised and connected by another member. You may comprise a 1st cover part, a 2nd cover part, and a 3rd cover part with a single member.
  • the nozzle part is formed to be inclined at a predetermined angle with respect to the jet axis direction of the liquid jet part, and the jet part and the jet axis of the liquid jet part are interposed therebetween. It is preferable to further include an illuminating unit provided so as to face each other and illuminate the direction of the nozzle hole. In this configuration, the fog state can be easily confirmed by illuminating the fog forward from the rear side in the spray direction of the sprayed fog.
  • the “predetermined angle” is, for example, 30 ° to 150 °. For example, FIG. 4 shows the case of 90 °.
  • the gas is not particularly limited, and examples thereof include air, clean air (clean air), nitrogen, inert gas, fuel mixed air, oxygen, and the like, and can be appropriately set according to the purpose of use.
  • liquid for example, chemical
  • FIG. 5B is a front view of FIG. 5A. It is sectional drawing of FIG. 5A. It is a cross section explaining a spray outlet part, a front, and a rear view. It is the A section detailed enlarged view of FIG. 6A.
  • FIG. 5A to 5C are diagrams for explaining the liquid orifice part
  • FIGS. 6A to 6B are figures for explaining the spray outlet part.
  • the liquid atomizing apparatus includes a nozzle portion that generates a mist and two liquid columns from a liquid, and a cover body that promotes miniaturization. First, the nozzle part will be described.
  • a sealing member such as packing may be interposed as appropriate.
  • the gas orifice 52 is connected to the gas supply path 48 through the gas supply path of the adapter 42.
  • the liquid orifice 51 is connected to the liquid supply path 47 through the liquid supply path of the adapter 42.
  • the liquid supply path 47 communicates with a liquid tank (not shown), and the liquid is supplied by a pump (not shown).
  • the gas supply path 48 is connected to an air pump (not shown) to supply gas.
  • the adapter 42 is formed with a tray part 421 for temporarily storing the liquid inside the cover body (for example, liquid in the liquid column). The liquid accumulated in the tray part 421 is sent to the liquid tank through the recycle path 49 and can be provided again for liquid supply.
  • a bottom cover 41 is provided below the adapter 42 to house the gas supply path 48, the liquid supply path 47, and the recycle path 49, and lead the apparatus to the outside of the apparatus.
  • the liquid orifice portion 51 is formed with a liquid orifice 511 (corresponding to a liquid ejecting portion) and two concave grooves 512.
  • a gas orifice (corresponding to a gas injection part) is formed by covering the concave groove 512 with the inner wall surface 52a of the gas orifice part 52 as a lid.
  • the rectangular cross-sectional width of the groove is smaller than the diameter of the liquid orifice.
  • the gas-liquid mixing area 120 is a portion where the tip direction of the liquid orifice 511 and the two concave grooves 512 cross each other in the tip direction.
  • the liquid flow ejected from the liquid orifice 511 is sandwiched between the gas flows ejected from the two gas orifices (512), so that the liquid flow is split and two liquid columns are formed. It is formed and the central part of the liquid stream is atomized, generating a slow-flow mist.
  • the gas orifice portion 52 has an inner wall surface 52a serving as a lid of the groove 512, as described above. Moreover, the gas orifice part 52 forms the spray outlet part 521 in the center of the front-end
  • the collision angle ( ⁇ ) between the two concave grooves 512 is 110 ° and the orifice cross section is a quadrangle, but is not particularly limited thereto.
  • the concave groove 512 formed on the outer wall surface of the liquid orifice portion 51 may be formed on the inner wall surface of the gas orifice portion 52 or may be formed on both.
  • the cross-sectional shape of the gas orifice is not limited to a rectangle, but may be another polygonal shape or a semicircular shape.
  • the cross-sectional shape of the liquid orifice is not particularly limited, but is preferably circular from the processed surface.
  • the shape of the gas-liquid mixing area 120 may be cylindrical in the spray axis direction, conical, or polygonal.
  • the collision angle ⁇ between the gas flows is not limited to 110 °, and can be arbitrarily set in the range of 90 ° to 180 °, for example.
  • the main body cover portion has a cylindrical first cover portion 43 connected to the adapter 42 from the side close to the spray outlet portion 521.
  • the second cover part 44 connected to the first cover part 43 has a plurality of intake parts 441.
  • the third cover portion 45 connected to the second cover portion 44 is opposed to the spraying direction, has an opening 451 that is smaller than the circular inner diameter of the cover body and guides the mist upward through the opening.
  • the opening size (diameter) of the opening 451 and the distance from the lower end of the opening to the spray outlet 521 are set in relation to the spray angle ⁇ and the two liquid columns. Fog flows through the opening 451 to the nozzle part 452 and is sprayed at a low speed to the outside of the apparatus. The liquid of the two liquid columns flows to the tray part 421.
  • the nozzle part 452 protrudes laterally with respect to the longitudinal axis of the apparatus main body (extension of the injection axis of the liquid orifice).
  • the LED illumination 70 is incorporated in the third cover 45 with the nozzle part 451 and the longitudinal axis of the apparatus main body (extension of the injection axis of the liquid orifice) interposed therebetween.
  • the LED illumination 70 illuminates fog that sprays at low speed toward the nozzle part 452.
  • the LED illumination 70 is removable from the third cover 45, and fog may be sprayed from the removed opening (two-way spray), or the fog may be blocked by a transparent member or the like.
  • a cap may be attached instead of the LED lighting 70.
  • connection (attachment) method of each member is not limited to the screw-type connection, and other connection means can be used, and a seal member (not shown) (for example, an O-ring or the like) is provided in the gap between the members. ) May be incorporated as appropriate.
  • the spray characteristics were evaluated using the liquid atomizing apparatus having the configuration shown in the first embodiment.
  • the total water spray amount when the water pressure Pw was changed while the air amount Qa of gas injection was constant at 0.5 (NL / min) and the air pressure Pa (MPa) was constant at 0.027.
  • the particle size (SMD) was evaluated. The evaluation results are shown in Table 1.
  • the average particle size (SMD) was measured with a laser diffraction measuring instrument. The measurement position was 20 mm from the spray outlet and 20 mm from the tip of the nozzle on the spray direction axis.
  • Example 5 the water pressure Pw is set to 0.015 (MPa), the total water spray amount Qw is made substantially constant, the air pressure Pa is changed, the air amount Qa of the gas injection, and the effective fog amount Qf and each average particle size (SMD) were evaluated.
  • the evaluation results are shown in Table 2. Other conditions are the same as those in Example 1.

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Abstract

Le présent dispositif d'atomisation de liquide comprend : une partie de pulvérisation de liquide (6) destinée à pulvériser un flux de liquide ; une première partie de pulvérisation de gaz (1) et une seconde partie de pulvérisation de gaz (2) destinées à pulvériser un flux gazeux afin que deux flux gazeux rencontrent ledit flux de liquide ; une zone de mélange gaz-liquide (120) destinée à former deux colonnes de liquide (63, 64) en faisant se rencontrer ledit flux gazeux pulvérisé par ladite première partie de pulvérisation de gaz (1) et ledit flux gazeux pulvérisé par ladite seconde partie de pulvérisation de gaz (2) avec ledit liquide pulvérisé par ladite partie de pulvérisation de liquide (6), et en atomisant le liquide ; et une évacuation de pulvérisation (30) à l'intérieur de laquelle ladite zone de mélange gaz-liquide (120) est formée ; les deux colonnes de liquide (63, 64) et la brume atomisée (62) étant pulvérisées par ladite évacuation de pulvérisation (30).
PCT/JP2012/077077 2011-11-14 2012-10-19 Dispositif d'atomisation de liquide WO2013073336A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011248886A JP2013103175A (ja) 2011-11-14 2011-11-14 液体霧化装置
JP2011-248886 2011-11-14

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WO2013073336A1 true WO2013073336A1 (fr) 2013-05-23

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6082724B2 (ja) * 2014-11-13 2017-02-15 株式会社いけうち スプレーノズルおよび該スプレーノズルを備えた加湿器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007038124A (ja) * 2005-08-02 2007-02-15 Institute Of Physical & Chemical Research 液体微粒子化ノズル及びそれを用いた装置
JP2008126200A (ja) * 2006-11-24 2008-06-05 Taco Co Ltd ノズル装置
JP2009172482A (ja) * 2008-01-22 2009-08-06 Daikin Ind Ltd 静電噴霧装置
JP2010247106A (ja) * 2009-04-17 2010-11-04 Nozzle Network Co Ltd 微細化促進用の気液混合ノズル装置
JP2011062582A (ja) * 2009-09-15 2011-03-31 Nozzle Network Co Ltd 微細化促進用器具および微細化促進用器具の気液混合ノズル装置
JP2011212649A (ja) * 2010-03-15 2011-10-27 Nozzle Network Co Ltd 二流体ノズルおよびその二流体ノズルを備える微細化装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007038124A (ja) * 2005-08-02 2007-02-15 Institute Of Physical & Chemical Research 液体微粒子化ノズル及びそれを用いた装置
JP2008126200A (ja) * 2006-11-24 2008-06-05 Taco Co Ltd ノズル装置
JP2009172482A (ja) * 2008-01-22 2009-08-06 Daikin Ind Ltd 静電噴霧装置
JP2010247106A (ja) * 2009-04-17 2010-11-04 Nozzle Network Co Ltd 微細化促進用の気液混合ノズル装置
JP2011062582A (ja) * 2009-09-15 2011-03-31 Nozzle Network Co Ltd 微細化促進用器具および微細化促進用器具の気液混合ノズル装置
JP2011212649A (ja) * 2010-03-15 2011-10-27 Nozzle Network Co Ltd 二流体ノズルおよびその二流体ノズルを備える微細化装置

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