JP2010247106A - Gas-liquid mixing nozzle device for miniaturization acceleration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-liquid mixing nozzle device for miniaturization acceleration, capable of miniaturizing an atomized body injected from a gas-liquid mixing nozzle. <P>SOLUTION: The gas-liquid mixing nozzle device 10 for the miniaturization acceleration includes a miniaturization chamber 20 for receiving a first atomized body 31 jetted from a nozzle distal end part, and is configured to miniaturize the first atomized body 31 in the miniaturization chamber 20 and distribute a second atomized body 32 from the miniaturization chamber 20. On the sidewall surface of the miniaturization chamber, at least one through-hole or at least one slit-like distribution part is formed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a gas-liquid mixing (or two-fluid) nozzle device, and more specifically, a liquid mixing nozzle for promoting miniaturization capable of miniaturizing an atomized body ejected from a conventional gas-liquid mixing nozzle device. Relates to the device.

  The need for droplets with submicron (1 to 10 μm) or nano (less than 1 μm) droplet sizes has become widespread in fields such as medical equipment (for example, suction machines), semiconductors (film formation technology), and spray dryers (new ceramic materials). It's getting on. Current atomization techniques include gas-liquid mixing type (two-fluid type), ultrasonic type, ultra-high pressure type (100 to 300 MPa), evaporation type, etc., all of which are expensive and difficult to miniaturize. . Furthermore, there are few apparatuses that can obtain submicron-size and nano-size droplet average particle diameters (MMD: mass median diameter) of 6 μm or less.

Moreover, the spray nozzle apparatus for producing | generating fine particle mist is known (patent document 1). This spray nozzle device has a first nozzle portion and a second nozzle portion, and can form a fine particle mist by colliding an injection liquid from the first nozzle portion with an injection liquid from the second nozzle portion. . However, since two two-fluid nozzle portions are provided, the cost is high and it is not suitable for downsizing. Further, when each of the two fluids is a high-pressure air pressure (3 kg / cm ² ) and tap water (50 cc / min), the average particle size of the fine particles formed by this spray nozzle device is about 8.8 μm ( Patent Document 1, Paragraph No. 0024), spray particles having a submicron size of 6 μm or less cannot be obtained.

  Patent Document 2 is known as another two-fluid nozzle. The two-fluid nozzle of Patent Document 2 is provided with a liquid flow path 20B along the central axis, an annular outer gas flow path 21B is provided on the outer periphery, and a liquid branch flow path 23 is provided in the middle of the liquid flow path. The swirling means 28 is disposed at the re-merging position of the branch flow path to primary atomize the liquid, and the central gas inflow portion 25 is formed in the central portion surrounded by the liquid branch flow path, and the outer side of the central gas inflow portion Gas is introduced from the gas flow path, swirled to introduce the gas into the center of the liquid that has become an annular film by collision mixing, the first mixing is performed while secondary atomization is performed, and further recombined A gas inflow hole 15d that communicates with the outer gas flow path is provided on the circumferential surface of the flow path that becomes the gas-liquid mixing flow path 30, and gas flows into the mixed fluid of the gas-liquid mixing flow path from the outer peripheral surface by collision mixing. The second mixing is performed while making the particles fine, and the gas-liquid mixing mist is obtained from the injection port 16g. It is made to injection. However, the structure inside the nozzle is complicated and the cost is high. Further, when the air / water ratio is 100 under the condition that the spray flow rate is 230 to 700 L / hour, the average particle size of the obtained spray liquid is about 50 μm, and submicron-size spray particles cannot be obtained.

Japanese Patent Laid-Open No. 2002-126587 (claim 1, paragraph number 0024, FIG. 1) JP 2002-159889 A (Claim 1, paragraph number 0038, FIG. 1, FIG. 2)

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a gas-liquid mixing nozzle device for promoting miniaturization that can atomize an atomized body ejected from a gas-liquid mixing nozzle. And

The gas-liquid mixing nozzle device for promoting miniaturization of the present invention for solving the above-mentioned problems is
A finer chamber for receiving the first atomized body ejected from the nozzle tip,
It is the structure which refines | miniaturizes a 1st atomization body in the said refinement | miniaturization chamber, and flows out a 2nd atomization body from the said refinement | miniaturization chamber.

  According to this configuration, the first atomized body ejected from the nozzle tip of the gas-liquid mixing nozzle device is caused to flow into the miniaturization chamber, and the first atomized body is refined in the miniaturization chamber. It is the structure which flows out the obtained 2nd atomization body from a refinement | miniaturization chamber. Therefore, the 1st atomization body formed with the gas-liquid mixing nozzle can be suitably refined | miniaturized (or atomized) in a refinement | miniaturization chamber, and a 2nd atomization body can be formed.

  For example, in a variety of commercially available gas-liquid mixing nozzles, the average particles of the first atomized body sprayed from the gas-liquid mixing nozzle under conditions of air pressure 0.02-0.5 MPa and spray flow rate 1-1000 mL / min The diameter was a wide range of 10 to 200 μm. And the mist (for example, wet mist) with a large particle diameter in the 1st atomization body ejected from the gas-liquid mixing nozzle tends to spread at a large angle with respect to the ejection direction from the gas-liquid mixing nozzle. Yes (see Figure 1, "Splashes"). A mist having a small particle diameter (for example, dry mist or haze) tends to be ejected on the ejection direction axis from the gas-liquid mixing nozzle (see FIG. 1, atomized body). For example, when the spray half angle of the gas-liquid mixing nozzle of FIG. 1 is 15 °, the spray half angle is about 55 °, the average particle size (MMD) of the splash particles is 50 to 100 μm, and the spray half angle is 15 °. The average particle diameter (MMD) of the particles in the part was 10 to 20 μm.

  Then, the mist having a large particle diameter (for example, wet mist) that has flowed into the miniaturization chamber collides (or comes into contact) with the miniaturization chamber wall surface (side surface, top surface, etc.), adheres to the miniaturization chamber wall surface, and is large. It appears to grow into droplets. Moreover, it is considered that a mist having a small particle diameter (for example, a dry mist) that has flowed into the miniaturization chamber is miniaturized during the inflow of the miniaturization chamber. Further, a mist having a smaller particle diameter (for example, dry mist or smoke) that has flowed into the miniaturization chamber tends to float in the air without adhering to or contacting the micronization chamber wall surface. Therefore, due to the function of the miniaturization chamber, a mist having a large particle size (for example, a wet mist) in the first atomized body grows into a droplet, and a mist having a small particle size (for example, a dry mist, its mist) In particular, the mist having a large particle diameter is refined, so that a second atomized body having an average particle diameter smaller than that of the first atomized body can be suitably generated.

  As the gas-liquid mixing nozzle, a known gas-liquid mixing nozzle (two-fluid nozzle) can be used, and a gas-liquid mixing nozzle device for promoting miniaturization can be suitably configured by providing a miniaturization chamber. Low cost and downsizing are possible. Examples of the gas-liquid mixing nozzle include metal, plastic, rubber, and a mixture thereof. The “gas” supplied to the gas-liquid mixing nozzle device is not particularly limited, and examples thereof include gases such as air, clean air, high oxygen concentration air, and inert gas. In addition, the “liquid” supplied to the gas-liquid mixing nozzle device is not particularly limited, but is a chemical solution such as water, ionized water, and lotion, a chemical solution such as a pharmaceutical solution, a bactericidal solution, and a sterilizing solution, a paint, and a coating agent. , Solvent, resin and the like.

  Further, the average particle diameter (MMD) of the first atomized body formed and ejected by the gas-liquid mixing nozzle is large (for example, larger than 6 μm), and the distribution tends to increase in the direction in which the particle diameter increases in the particle size distribution. However, the average particle diameter (MMD) of the second atomized body refined in the miniaturization chamber is small (for example, 6 μm or less), the distribution width of the particle size distribution is small, and the particle diameter is substantially uniform.

  Examples of the miniaturization chamber include metal, plastic, rubber, and a mixture thereof. It is preferable to design the material in consideration of the wettability (adhesion between the solid surface and the liquid) of the miniaturized interior wall according to the liquid of the atomized body. In addition, a coating agent can be coated on the inside of the miniaturization chamber to promote miniaturization. A mist having a large particle diameter in the first atomized body (for example, a wet mist, a mist having a large particle diameter in a dry mist) is attached to the wall surface of the miniaturization chamber and grown into droplets, whereby the first mist The second atomized body can be formed by refining the entire body. In addition, it is preferable to configure the miniaturization chamber so that a mist having a large particle diameter that is ejected as droplets contacts or collides with the wall of the miniaturization chamber and grows the large mist into droplets.

  The shape of the miniaturization chamber is not particularly limited. For example, a cylindrical shape, a cone shape (concept including a cone, a truncated cone, a polygonal pyramid, and a truncated cone, the same shall apply hereinafter), a trumpet shape, a polygonal column, a spherical shape, and a polyhedron. These shapes are combined, and a cylindrical shape, a truncated cone shape, a trumpet shape, and the like parallel to the ejection direction of the first atomized body are preferable. Moreover, the indoor space size of the miniaturization chamber is not particularly limited, and can be set according to, for example, a connection structure with a gas-liquid mixing nozzle and specifications for forming the second atomized body. The size of the miniaturization chamber can be designed to be the same as that of a small gas-liquid mixing nozzle, and thus the gas-liquid mixing nozzle device can be made small. The connection structure between the micronization chamber and the gas-liquid mixing nozzle is not particularly limited. For example, the structure in which one opening of the micronization chamber is directly fixed to the nozzle tip, and the connection between the micronization chamber and the nozzle tip is connected. Examples include a structure in which a part is interposed. As for a connection part, a flexible tube, a pipe | tube, etc. are mentioned, for example.

  In addition, as an embodiment of the present invention, there is a configuration in which one or more through holes or one or more slit-shaped circulation portions are formed on the side wall surface of the miniaturization chamber. According to this structure, the 2nd atomization body distribute | circulates out from the distribution | circulation part formed in the side wall surface of a micronization chamber. The circulation part has one or more through holes or slits. If a through-hole or a slit is formed perpendicular to the wall surface, the second atomized body flows out substantially perpendicular to the wall surface. Moreover, if a through-hole or a slit is formed at a predetermined angle with respect to the wall surface, the second atomized body flows out in the predetermined angle direction with respect to the wall surface. Thereby, the outflow direction can be regulated.

  In addition, as an embodiment of the present invention, there is a configuration in which a miniaturization chamber is arranged on the ejection direction axis of the first atomized body ejected from the nozzle tip. According to this configuration, since the miniaturization chamber is arranged on the ejection direction axis of the first atomized body, the first atomized body can be smoothly fed into the miniaturization chamber.

  In addition, as an embodiment of the present invention, there is a configuration further including a discharge wall having an opening that regulates the outflow direction of the second atomized body flowing out from the circulation portion outside the miniaturization chamber. According to this structure, the discharge | release direction of the 2nd atomization body distribute | circulated from the distribution part can be controlled suitably. The discharge wall only needs to be installed at least around the circulation part, and the discharge wall can be constituted by a pipe fixed around the circulation part. Further, the discharge wall can be configured to surround the outer periphery of the miniaturization chamber and restrict the discharge direction of the second atomized body discharged from the flow part to the opening part direction of the discharge wall (see FIGS. 2 and 3). .

As another embodiment of the present invention,
A contact portion that contacts the atomized body is provided on the ejection direction axis of the first atomized body in the refined chamber, and one or more through holes or one or more slit-shaped flow portions are provided on the ceiling wall surface of the refined chamber. There is a structure to be formed (see FIG. 4). According to this configuration, the mist having a large particle diameter in the first atomized body comes into contact with the contact portion and grows into a droplet, and the mist having a small particle diameter remains in the mist even when contacting the contact portion. While floating inside, discharge from the circulation part (see FIG. 4).

  Further, as an embodiment of the present invention, there is a configuration in which a liquid discharge unit is provided in the miniaturization chamber. According to this configuration, the liquid that has grown into droplets in the miniaturization chamber can be suitably discharged to the outside of the miniaturization chamber, and the liquid (discharged liquid) accumulates at the tip of the nozzle, thereby ejecting the first atomized body. There is no disturbing. Further, it is preferable that the nozzle tip is formed in a convex shape so as to suppress the back flow of the liquid.

  Moreover, in said embodiment, the structure provided with the liquid storage part which stores the liquid discharged | emitted from the discharge part, and the suction part which supplies the liquid of a liquid storage part to a gas-liquid mixing nozzle apparatus is preferable. According to this configuration, the liquid that has grown into droplets in the miniaturization chamber can be discharged from the discharge section, and the discharged liquid can be stored in the liquid storage section, and the reduction of the micronization effect due to the liquid can be suitably suppressed. . The discharge part and the storage part may be directly connected or connected by a connecting pipe such as a pipe. A configuration in which the droplet falls by its own weight (or flows on the wall surface), is discharged from the discharge portion, and flows to the liquid storage portion as it is is preferable. Moreover, since the suction part which supplies the liquid of a liquid reservoir part to a gas-liquid mixing nozzle apparatus is provided, the liquid (discharge liquid) in a liquid reservoir part is attracted | sucked by a suction part, and the liquid feed pipe of a gas-liquid mixing nozzle And the liquid can be reused. The suction includes, for example, a suction action by feeding the supply liquid (negative pressure action by water flow).

  In another embodiment of the present invention described above, there is a configuration in which a gas inflow portion for introducing gas into the miniaturization chamber is formed. According to this configuration, since the atmospheric pressure balance in the miniaturization chamber can be adjusted, the spraying speed and the injection amount of the first atomized body sprayed from the nozzle can be finely adjusted to adjust the micronization effect, and from the miniaturization chamber This is preferable because the outflow speed of the second atomized body to be discharged can be adjusted. The gas inflow portion formed in the miniaturization chamber can be composed of one or more holes or slits. The gas inflow portion is preferably formed at a position substantially the same as the height position of the gas-liquid mixing nozzle tip (see FIG. 8B). Moreover, when the outer wall which covers the outer side of a micronization chamber exists, it is preferable to form a gas inflow part also in this outer wall. The amount of gas flowing into the miniaturization chamber can be adjusted by adjusting the opening size of the first gas inflow portion formed in the miniaturization chamber or the second gas inflow portion formed in the outer wall. The “gas” here is not particularly limited, and examples thereof include gases such as air, clean air, high oxygen concentration air, and inert gas.

  In the gas-liquid mixing nozzle device of the present invention, the gas (air) pressure supplied to the gas-liquid mixing nozzle device is 0.01 MPa or more and 0.1 MPa or less, and the total injection liquid (water) amount is 0. .3 ml / min to 1.5 mL / min, and effective atomization rate can be 8% to 17%. Moreover, the average particle diameter (MMD) of the mist (second atomized body) discharged to the outside of the apparatus is 1.0 μm or more and 6.0 μm or less, more preferably 1.0 μm or more and 5.0 μm or less. Can be configured to be 1.0 μm or more and 4.0 μm or less. That is, since the gas pressure can be reduced, the drive source (for example, an air pump, a power source, a compressed air cylinder, a manual air supply mechanism) necessary for gas supply of the gas-liquid mixing nozzle device of the present invention can be reduced in size.

  The effective atomization rate is calculated by (total injection liquid (water) amount−liquid (water) adhesion amount) / total injection liquid (water) amount × 100 (%). The amount of liquid (water) adhesion is obtained by measuring the amount of liquid (water) discharged from the discharge portion. The total amount of the injected liquid (water) is obtained by measuring the amount of the injected liquid for a predetermined time in advance.

It is a figure which shows the photograph of an example of the atomized body ejected from the gas-liquid mixing nozzle. It is a schematic diagram which shows the example of the gas-liquid mixing nozzle apparatus for refinement | miniaturization of Embodiment 1. FIG. It is a schematic diagram which shows the example of the gas-liquid mixing nozzle apparatus for refinement | miniaturization of Embodiment 2. FIG. It is a schematic diagram which shows the example of the gas-liquid mixing nozzle apparatus for refinement | miniaturization of Embodiment 3. FIG. It is a schematic diagram which shows the example of a miniaturization chamber. It is a schematic diagram which shows the example of a miniaturization chamber. It is a figure which shows the particle size distribution of an Example. It is a schematic diagram which shows the example of the gas-liquid mixing nozzle apparatus for refinement | miniaturization of Embodiment 4. FIG.

(Embodiment 1)
The gas-liquid mixing nozzle device for promoting miniaturization according to the first embodiment will be described below with reference to FIG. The gas-liquid mixing nozzle device 10 of FIG. 2 includes a miniaturization chamber 20 that receives a first atomized body 31 ejected from the nozzle tip. The gas-liquid mixing nozzle device 10 has a known structure, and FIG. 2 is a schematic diagram thereof (the same applies to the following embodiments). Liquid is fed through the liquid feed tube 11 and gas is fed through the gas feed tube 12. The miniaturization chamber 20 in FIG. 2A is connected and fixed to the nozzle tip on the ejection direction axis and receives the first atomized body 31. In the forward portion of the atomization chamber 20 in the ejection direction, four holes 21 are formed, and the second atomized body 32 refined in the atomization chamber 20 flows out of the atomization chamber 20. A discharge portion 22 for discharging the liquid formed by the mist in the first atomized body growing into droplets is formed at a position near the nozzle tip of the miniaturization chamber 20. Although the miniaturization chamber 20 has a cylindrical shape in FIG. 2, the discharge portion wall surface may be configured to be a wall surface recessed from the other wall surfaces so as to facilitate liquid discharge. Further, the gas-liquid mixing nozzle tip may be convex to prevent the liquid from flowing back into the nozzle (the same applies to the following embodiments).

  Further, as shown in FIG. 2B, a truncated cone 24 having an opening 24a radially expanded is connected and fixed to the outer periphery of the miniaturization chamber 20, and the circulation wall 21 is separated from the circulation portion 21 by the discharge wall 24b and the opening 24a. The outflow direction of the second atomized body 32 that flows out is regulated. Note that the miniaturization chamber 20 and the truncated cone 24 can be configured as an integral structure.

  Further, as shown in FIG. 2C, the discharge direction of the second atomized body 32 is switched, the particles of the second atomized body 32 are retained, and the amount of discharge of the atomized body per unit time can be provided uniformly. The food part 40 can be arranged. A discharge portion 41 is formed at the tip of the hood portion 40. Further, the exhaust pipe 26 extending from the discharge unit 22 is guided to the outside of the hood unit 40. The pipe 26 can recycle the liquid by guiding it to a liquid feeding section (not shown) or the liquid feeding pipe 11. Although the discharge part 22 is a hole, the number and size can be designed according to the quantity of discharge liquid.

  Moreover, FIG.2 (d) is the figure which made the discharge | release direction of the 2nd atomizer 32 the upward direction for the gas-liquid mixing nozzle apparatus of FIG.2 (c). Moreover, FIG.2 (e) is the figure which made the discharge | release direction of the 2nd atomization body 32 face down the gas-liquid mixing nozzle apparatus of FIG.2 (c). In this case, the liquid discharge portion 22 is formed on the bottom surface of the miniaturization chamber 20, and a discharge pipe 26 extending from the discharge portion 22 is guided to the outside of the hood portion 40.

  In addition, the micronization chamber 20, the hood unit 40, the nozzle tip, etc. can be cleaned by attaching the micronization chamber 20 and the hood unit 40 to the nozzle tip with a detachable structure (for example, screw type, fitting type). Maintenance can be easily performed, and the miniaturization chamber 20 and the hood portion 40 can be made disposable (the same applies to the following embodiments). Similarly, the circular platform 24 can be configured to be detachable.

  Similarly to the discharge part 22 of the miniaturization chamber 20, when mist adheres to the wall surface of the truncated cone 24 or the hood part 40, the discharge part (not shown) for discharging the attached liquid is a truncated cone 24. There is also a configuration formed in the hood portion 40.

  Further, as shown in FIG. 2 (f), an intake hole 71 (corresponding to a gas inflow portion) for allowing outside air to flow into the miniaturization chamber 20 and the hood portion 40 is formed, and the atmospheric pressure in the miniaturization chamber is adjusted. Thus, the finening effect can be finely adjusted, and the release rate of the formed second atomized body can be adjusted.

(Miniaturization room)
As shown in FIG. 5A, the outflow portion 21 of the miniaturization chamber 20 can be configured as four holes (two not shown). The number of holes is not limited to four, and may be one or two or more. Also, the size of the holes may not be the same, and the flow part 21 may be configured by a plurality of holes mixed in size. Moreover, as shown in FIG.5 (b), the distribution | circulation part 21 can be comprised as a slit. The slit may be configured to be double or triple, and may be configured as a plurality of slits divided on the circumference. Moreover, the distribution | circulation part 21 can also be comprised by both a hole and a slit.

  The miniaturization chamber 20 in FIG. 6A is cylindrical. 6B and 6C is a truncated cone. The miniaturization chamber 20 in FIG. 6D has a cylindrical shape with a tip hemisphere. The shape of the miniaturization chamber is not limited to FIG.

  According to the first embodiment, the first atomized body 31 can be suitably miniaturized in the miniaturization chamber 20. Further, the second stage of miniaturization can be performed by the truncated cone 24 or the hood part 40 (corresponding to the function of the latter stage miniaturization chamber).

(Example)
Table 1 shows the result of the effective atomization rate corresponding to the change in air pressure using the gas-liquid mixing nozzle device of FIG. The diameter of the orifice at the nozzle tip is 0.45 mm. Tap water stored in a tank was used as the liquid. The effective atomization rate (%) when the air pressure (MPa) was changed using an air pump was calculated. In Table 1, Examples 3 to 5, Examples 8 to 10, and Examples 11 to 13 show the results of implementation at the same air pressure value, and the average effective atomization rate is calculated.

  When the air pressure supplied to the gas-liquid mixing nozzle device is 0.01 MPa or more and 0.09 MPa or less, the total water injection amount is 0.3 ml / min or more and 1.5 mL / min or less, and the effective atomization rate is It was 8% or more and 17% or less.

  Moreover, the particle size distribution (particle diameter histogram (number distribution and mass distribution)) of the second atomized body (32) in the case of Example 8 in Table 1 is shown in FIG. It is the result of carrying out laser measurement in the position of distance 7mm from the ejection position (opening 24a of the truncated cone 24) of the 2nd atomization body (32). As a laser measurement method, a phase difference Doppler laser particle analysis (PDPA) method was used. As a result of the measurement, the number of measured particles of the second atomized body (32) was 941, and the arithmetic average diameter was 2.21 μm (maximum 6.0 μm), the Sauter average diameter was 3.68 μm, and the average particle diameter (MMD) was 4. .18 μm. Moreover, the average particle diameter (MMD) of the 1st atomization body (31) in the state which has not attached the refinement | miniaturization chamber (20) was 6.96micrometer.

  Moreover, as a comparative example, as a result of measuring about a commercially available ultrasonic atomizer, the arithmetic average diameter was 2.48 μm (maximum 8.0 μm), and the average particle diameter (MMD) was 5.37 μm. That is, it was confirmed that an atomized body having an average particle size smaller than that of the ultrasonic atomizer could be formed.

  Moreover, as can be seen from the particle size distribution in Table 1 and Example 8, the first atomized body (31) having an average particle diameter (MMD) of 6.96 μm is changed to the second atomized body having an average particle diameter (MMD) of 4.18 μm. It was confirmed that (32) was suitably miniaturized. It was also confirmed that the effective atomization rate could be 8% or more even if the supplied air pressure (or air pump performance) was reduced.

(Embodiment 2)
The gas-liquid mixing nozzle device for promoting miniaturization according to the second embodiment will be described below with reference to FIG. The gas-liquid mixing nozzle device 10 of FIG. 3 includes a miniaturization chamber 20 that receives a first atomized body 31 ejected from the nozzle tip. A discharge portion 22 for discharging the liquid formed by the mist in the first atomizing body 31 growing into droplets is formed at a position near the nozzle tip of the miniaturization chamber 20. Further, as shown in FIG. 3A, a truncated cone 24 having an opening 24 a radially expanded on the outer periphery of the miniaturization chamber 20 is connected and fixed in a direction different from that in the first embodiment. Similarly to the first embodiment, the discharge direction of the second atomized body 32 flowing out from the circulation portion 21 is regulated by the discharge wall 24b and the opening 24a. FIG. 3B is a view showing an example of a shape in which the opening 24a becomes a bottom dent.

  Moreover, as shown in FIG.3 (c), the food | hood part 40 which is the function structure similar to Embodiment 1 is arrange | positioned. FIG. 3D shows an example in which the hood portion 40 is arranged without the truncated cone 24. The wall surface 40a of the hood part 40 realizes the function of a discharge wall, and the second atomized body 32 is discharged from the opening 41. Similar to the first embodiment, the exhaust pipe 26 extending from the liquid discharge section 22 is guided to the outside of the hood section 40.

  Further, an intake hole (corresponding to a gas inflow portion) for allowing outside air to flow into the miniaturization chamber 20 and the hood portion 40 is formed, and the atmospheric pressure in the miniaturization chamber is adjusted to finely adjust the miniaturization effect. It is possible to adjust the release rate of the second atomized body.

  According to the second embodiment, the first atomized body 31 can be suitably miniaturized in the miniaturization chamber 20. Further, the second stage of miniaturization can be performed by the truncated cone 24 or the hood part 40 (corresponding to the function of the latter stage miniaturization chamber).

(Embodiment 3)
The gas-liquid mixing nozzle device for promoting miniaturization according to Embodiment 3 will be described below with reference to FIG. The gas-liquid mixing nozzle device 10 in FIG. 4 includes a miniaturization chamber 20 that receives a first atomized body 31 ejected from the nozzle tip. As shown in FIG. 4A, a contact portion 28 that comes into contact with the first atomized body 31 is provided on the ejection direction axis of the first atomized body 31 in the miniaturized chamber 20. One or more through holes or one or more slit-shaped flow portions 21 are formed on the ceiling wall surface.

  Moreover, as shown in FIG.4 (b), the food | hood part 40 which is the function structure similar to Embodiment 1 is arrange | positioned. FIG. 4C is a view in which the gas-liquid mixing nozzle device of FIG. 4B is arranged such that the discharge direction of the second atomized body 32 is upward. FIG. 4D is a diagram in which the gas-liquid mixing nozzle device of FIG. 4B is configured such that the discharge direction of the second atomized body 32 is downward. Similarly to the first embodiment, the liquid discharge portion 22 is formed on the bottom surface of the miniaturization chamber 20, and a discharge pipe 26 extending from the discharge portion 22 is guided to the outside of the hood portion 40.

  Further, as shown in FIG. 4E, an intake hole 71 (corresponding to a gas inflow portion) for allowing outside air to flow into the miniaturization chamber 20 and the hood portion 40 is formed, and the atmospheric pressure in the miniaturization chamber is adjusted. Thus, the finening effect can be finely adjusted, and the release rate of the formed second atomized body can be adjusted.

(Embodiment 4)
The gas-liquid mixing nozzle device for promoting miniaturization according to the fourth embodiment will be described below with reference to FIG. The gas-liquid mixing nozzle device 10 in FIGS. 8A and 8B includes a miniaturization chamber 20 that receives a first atomized body 31 that is ejected from the nozzle tip. The miniaturization chamber 20 is installed on the ejection direction axis of the first atomized body 31. The distribution unit 21 is the same as in the above embodiment. The external shape of the gas-liquid mixing nozzle has a hexagonal cross section (not limited to a hexagonal shape but may be a polygonal cross sectional shape), and the one opening diameter of the miniaturization chamber 20 is fitted according to the diagonal length of the hexagon. Can be configured. In this case, a gap is formed between each side of the hexagon and the inner wall surface of the miniaturization chamber 20. This gap functions as the discharge unit 22. The liquid droplets (liquid) discharged from the discharge unit 22 flow into the liquid storage unit 50 through the gap 50a between the liquid storage unit 50 and the gas-liquid mixing nozzle. The liquid reservoir 50 can be formed in a cylindrical shape and can be fitted into the gas-liquid mixing nozzle in the same manner as the miniaturization chamber 20 to form the gap 50a. As another embodiment, a groove or a pipe is formed in the outer wall surface of the nozzle so that the liquid droplet (liquid) flows into the liquid reservoir 50.

  A suction pipe 51 (corresponding to the suction part) is disposed inside the liquid reservoir 50, and the liquid accumulated in the liquid reservoir 50 is sent to the liquid feed pipe 11 of the gas-liquid mixing nozzle by the suction pipe 51 and reused. can do. As the suction action, for example, a negative pressure action by liquid feeding can be used.

  8A and 8B, the miniaturization chamber 20 and the discharge wall 24b are integrated. The second atomized body refined in the miniaturization chamber 20 flows out from the flow part 21, is guided by the discharge wall 24 b, flows out from the opening part 24 a, is guided to the hood part 40, and is discharged from the discharge part 41. Is done.

  Reference numeral 60 denotes a nozzle base, which is used for fixing the apparatus. In FIG. 8, the liquid reservoir 50 and the nozzle base 60 are connected, but the present invention is not limited to this, and the nozzle base 60 and the hood part 40 may be connected. Moreover, although the liquid reservoir 50 and the hood part 40 are connected, it is not restricted to this, The hood part 40 and the refinement | miniaturization chamber 20 or the gas-liquid mixing nozzle may be connected. In this case, the drainage flow path is secured.

  As another embodiment, as shown in FIG. 8B, there is a configuration in which an intake cylinder 70 is formed on the outer periphery of the miniaturization chamber 20. The intake cylinder 70 can be configured integrally with the miniaturization chamber 20, or can be configured separately and fixed, or can be detachably attached. Then, an intake hole 71 (corresponding to a gas inflow portion) penetrating through the miniaturization chamber 20, the intake cylinder 70, the liquid reservoir 50 and the hood portion 40 is formed. In FIG. 8B, one intake hole 71 is illustrated, but four intake holes that are cross-shaped in cross-sectional view may be formed. The number of intake holes 71 may be one or more. Thereby, outside air flows in from the intake hole 71, the atmospheric pressure in the miniaturization chamber 20 can be adjusted, and the discharge speed of the formed second atomized body can be adjusted. Further, by rotating and sliding the hood portion 40 on the outermost wall of the intake hole 71 in the axial direction, the opening size of the intake hole 71 can be adjusted, and the outside air inflow amount can be adjusted to reduce the size of the second atomized body. The release rate can be adjusted.

  The intake cylinder 70 has a drain hole (not shown) penetrating from the top to the bottom of the drawing. The liquid that has grown from mist into droplets in the hood 40 can flow into the lower liquid reservoir 50 through this drainage hole. One or more drain holes may be formed.

  Further, each member, nozzle tip, etc. can be obtained by attaching the miniaturization chamber 20, the intake cylinder 70, the hood 40, the liquid reservoir 50, and the nozzle base 60 with a detachable structure (for example, screw type, fitting type). Cleaning and maintenance can be easily performed, and each member can be made disposable.

DESCRIPTION OF SYMBOLS 10 Gas-liquid mixing nozzle 20 Micronization chamber 21 Distribution | circulation part 22 Discharge part 24 Frustum 24a Opening part 24b Release wall 31 1st atomization body 32 2nd atomization body 40 Hood part 41 Opening part 50 Liquid reservoir part 51 Intake pipe 71 Air intake hole

Claims (8)

A finer chamber for receiving the first atomized body ejected from the nozzle tip,
A gas-liquid mixing nozzle device for promoting miniaturization, wherein the first atomized body is refined in the refinement chamber, and the second atomized body flows out from the refinement chamber.   The gas-liquid mixing nozzle device for promoting miniaturization according to claim 1, wherein one or more through holes or one or more slit-shaped flow portions are formed on a side wall surface of the miniaturization chamber.   The gas-liquid mixing nozzle device for promoting miniaturization according to claim 1 or 2, wherein the miniaturization chamber is disposed on an ejection direction axis of a first atomized body ejected from the nozzle tip.   The miniaturization according to any one of claims 1 to 3, further comprising a discharge wall having an opening that regulates an outflow direction of the second atomized body flowing out from the circulation section outside the miniaturization chamber. Gas-liquid mixing nozzle device for promotion.   A contact portion that comes into contact with the first atomized body is provided on the ejection direction axis of the first atomized body in the micronized chamber, and one or more through holes or one or more slits are formed on the ceiling wall surface of the micronized chamber. The gas-liquid mixing nozzle device for promoting miniaturization according to claim 1, wherein the gas-liquid mixing nozzle device according to claim 1 is formed.   The gas-liquid mixing nozzle device for promoting miniaturization according to any one of claims 1 to 5, wherein a liquid discharge section is provided in the miniaturization chamber. A liquid reservoir for storing the liquid discharged from the discharge portion;
The gas-liquid mixing nozzle device for promoting miniaturization according to claim 6, further comprising a suction unit that supplies the liquid in the liquid reservoir to the gas-liquid mixing nozzle device. The gas-liquid mixing nozzle device for promoting miniaturization according to any one of claims 1 to 7, wherein a gas inflow portion through which gas flows into the miniaturization chamber is formed.