JP2011025203A - Functional mist generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a functional mist generator capable of generating functional mist which holds an effective component of high concentration. <P>SOLUTION: The functional mist generator includes a pressurization part 11 for injecting gas in a liquid under pressure to generate a gas-liquid mixed solution wherein gas bubbles having a nanometer size is mixed with the liquid, a discharge part 3 for generating discharge in the gas held to the state pressurized in the pressurization part 11, a voltage applying part 4 for applying high voltage to the discharge part 3 and a mist generating part 9 for further forming the functional solution, which comprises the gas-liquid mixed solution formed by injecting the gas generating the effective component by discharge in the liquid under pressure, into mist. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a functional mist generator capable of generating a functional mist containing an active ingredient.

  DESCRIPTION OF RELATED ART Conventionally, the functional mist production | generation apparatus which can produce | generate the functional mist containing active ingredients, such as ozone, is known. This functional mist generating device is configured to generate a functional liquid containing an active ingredient such as ozone, and to release the functional liquid by misting (see, for example, Patent Document 1).

  However, the conventional functional mist generating apparatus having the above configuration has a problem that there is a limit to the amount of the active ingredient present in the functional liquid, and therefore there is a limit to the concentration of the active ingredient held by the functional mist.

JP 2006-346203 A

  This invention is invented in view of the said problem, Comprising: It aims at providing the functional mist production | generation apparatus which can produce | generate the functional mist which hold | maintains a high concentration active ingredient.

  In order to solve the above-described problem, the functional mist generating apparatus of the present invention includes a pressurizing unit 11 that generates a gas-liquid mixed liquid in which nanometer-sized bubbles are mixed with the liquid by pressurizing and injecting the gas into the liquid. A discharge unit 3 that generates a discharge in a gas pressurized in the pressurization unit 11, a voltage application unit 4 that applies a high voltage to the discharge unit 3, and a gas in which an active component is generated by the discharge are added. It is assumed that a mist generating unit 9 that further mists a functional liquid composed of a gas-liquid mixed liquid generated by pressure injection is provided.

  According to the functional mist generating apparatus of the present invention, the active ingredient generated by the discharge unit 3 in the pressurizing unit 11 can be mixed in the liquid and can exist in the form of fine bubbles of nanometer size. Therefore, the gas containing the active ingredient can be present in the liquid in an amount exceeding the saturation solubility. Further, since buoyancy does not act on fine bubbles of nanometer size, bubbles made of a gas containing this active ingredient can be stably present in the liquid for a long period of time. This makes it possible to create a functional liquid that holds the active ingredient stably and at a high concentration. And the functional mist which hold | maintains a high concentration active ingredient can be created by further mist-izing the functional liquid created here.

  In addition, since the pressurized gas in the pressurizing unit 11 is used as a discharge location for generating the active ingredient, the active ingredient can be generated at a high concentration even at a relatively low voltage. That is, according to the functional mist generating apparatus of the present invention, it is possible to efficiently create a functional mist containing an active ingredient in a very high concentration while reducing the required energy.

  In the functional mist generating apparatus of the present invention, the liquid forming the gas-liquid mixed liquid is a liquid composed of molecules that form hydrogen bonds, and the distance between the hydrogen bonds of the molecules present at the interface with the bubbles of the liquid is It is preferably shorter than the hydrogen bond when the liquid is at normal temperature and pressure. In this way, the distance between hydrogen bonds at the bubble interface is shortened, so that the bubbles can be surrounded by liquid molecules that form strong hydrogen bonds. The liquid molecules that form hydrogen bonds form a strong shell that encloses the bubbles, preventing the bubbles from colliding and collapsing, and counteracting the pressure from the liquid with the stress from inside the bubbles. Therefore, the bubbles can exist stably without disappearing or coalescing in the liquid. In addition, by functionalizing a functional liquid composed of a gas-liquid mixed liquid in which bubbles are present at a high concentration and in a stable manner, a functional mist that holds an active ingredient at a very high concentration can be created.

  Moreover, it is preferable that the nanometer-sized bubbles forming the gas-liquid mixture are formed of a gas having a pressure of 0.12 MPa or more. By doing this, bubbles can be maintained at a high internal pressure to form a stronger interface structure, and bubbles can exist more stably without disappearing or coalescing in the liquid. It becomes. In addition, the pressure of the gas in the bubbles maintains a balance with the pressure from the liquid over a long period of time unless there is an external impact. Can be used. In addition, by functionalizing a functional liquid composed of a gas-liquid mixed liquid in which bubbles are present at a high concentration and in a stable manner, a functional mist that holds an active ingredient at a very high concentration can be created.

  Further, the discharge part 3 provided in the functional mist generating device of the present invention includes an electrode part 38 and an insulating spacer 37 disposed in close contact with or near the electrode part 38, and applies a voltage to the electrode part 38. Thus, the microplasma generator 30 that generates microplasma discharge in the minute discharge space S formed along the insulating spacer 37 is preferable. By doing so, it is possible to generate high-density plasma in the minute discharge space S of the microplasma generator 30, generate a large amount of active components, and supply this to the pressurizing unit 11.

  Moreover, it is preferable that the said mist generating part 9 with which the functional mist production | generation apparatus of this invention is provided is what mist-forms a functional liquid using the pressure which the pressurization part 11 provides. In this way, by using a common pressure source, it is possible to achieve downsizing and cost reduction of the entire apparatus.

  Further, the mist generating unit 9 provided in the functional mist generating device of the present invention is an electrostatic atomizing device 13 that causes electrostatic atomization to occur in the functional liquid by applying a voltage to the functional liquid, thereby forming a mist. It is also preferable. By doing in this way, the charged fine particle water by which the functional liquid which hold | maintains an active ingredient stably and with high concentration is atomized can be utilized as a functional mist. Therefore, it becomes easy to control the particle size of the functional mist. Further, the functional mist can be discharged to the outside as a fine mist in a charged state.

  Further, the discharge part 3 provided in the functional mist generating device of the present invention includes an electrode part 38 and an insulating spacer 37 disposed in close contact with or near the electrode part 38, and applies a voltage to the electrode part 38. Thus, the microplasma generator 30 generates a microplasma discharge in the minute discharge space S formed along the insulating spacer 37, and the mist generator 9 applies a voltage to the functional liquid. It is also preferable that the electrostatic atomizer 13 be a mist by causing electrostatic atomization of the functional liquid.

  The voltage application unit 4 included in the functional mist generating device of the present invention is commonly used as a unit for applying a voltage to the discharge unit 3 and a unit for applying a voltage to the functional liquid at the mist generation unit 9. It is also preferable. In this way, the discharge unit 3 and the mist generation unit 9 share the voltage application means, thereby making it possible to reduce the size and cost of the entire apparatus.

  The functional mist generating device of the present invention includes a pressurizing unit that generates a gas-liquid mixed solution in which nanometer-sized bubbles are mixed with a liquid by pressurizing and injecting the gas into the liquid, and the pressurizing unit is pressurized. A discharge part that generates a discharge in a gas in a discharged state, a voltage application part that applies a high voltage to the discharge part, and a gas-liquid mixture generated by pressurizing and injecting a gas in which an active component is generated by the discharge And a mist generating unit for further misting the functional liquid. This makes it possible to keep the gas containing the active ingredient in the liquid in an amount exceeding the saturation solubility, and because buoyancy does not work on the fine bubbles of nanometer size, each bubble is long in the liquid. It can exist stably over a period of time. And an active ingredient can be produced | generated by a high density | concentration in a pressurization part even if it is a comparatively low voltage.

  In other words, according to the functional liquid generating apparatus of the present invention, a functional liquid composed of a gas-liquid mixed liquid containing an active ingredient at a very high concentration and in a stable state can be efficiently obtained while reducing energy required. As a result, a functional mist containing an active ingredient in a very high concentration can be efficiently created while reducing the required energy.

1 is an overall schematic diagram of an example functional mist generating device in an embodiment of the present invention. It is the schematic of the discharge part with which a functional mist production | generation apparatus same as the above is provided. It is the schematic of the modification of the discharge part with which a functional mist production | generation apparatus same as the above is provided. (A)-(c) is the schematic which shows a part of functional mist production | generation apparatus same as the above. (A)-(d) is the schematic which shows a part of functional mist production | generation apparatus same as the above. It is the schematic which shows a part of functional mist production | generation apparatus same as the above. It is the schematic which shows the mist generating part with which a functional mist production | generation apparatus same as the above is provided. It is the schematic which shows the modification of a mist generating part same as the above. It is the schematic which shows the other modification of a mist generating part same as the above. It is the schematic which shows the further another modification of a mist generating part same as the above. It is a graph which shows the gas volume contained in a gas-liquid liquid mixture. It is a photograph figure of the gas-liquid liquid mixture by a scanning electron microscope (SEM). It is a conceptual explanatory drawing of the bubble in a gas-liquid liquid mixture. It is a graph which shows the difference of the infrared absorption spectrum of the gas-liquid liquid mixture using nitrogen and water, and nitrogen saturated water. It is a graph which shows stability of a gas-liquid liquid mixture. It is the whole schematic of the modification which shared the pressure source in the functional mist production | generation apparatus same as the above. It is the whole schematic diagram of the modification which shared the voltage application part in the functional mist generating apparatus same as the above.

  The present invention will be described based on embodiments shown in the accompanying drawings. The functional mist generating apparatus of this example forms fine bubbles of nanometer size (hereinafter referred to as “nanobubbles”) in a liquid by a gas containing an active ingredient and having a pressure of 0.12 MPa or more, and is a gas-liquid mixed liquid. Is generated. The liquid constituting the gas-liquid mixture is provided such that the distance between hydrogen bonds of molecules present at the interface with the nanobubbles of the liquid is shorter than the hydrogen bond when the liquid is at normal temperature and pressure.

  FIG. 1 shows a basic configuration of a functional mist generating apparatus of a first example in the embodiment of the present invention. As shown in the drawing, the functional mist generating device of the first example includes a liquid storage tank 22 that holds a liquid at atmospheric pressure (0.1 MPa), and a gas supply path 12 for the liquid supplied from the liquid storage tank 22. Pressurization unit 11 that generates a gas-liquid mixture in which nanobubbles are mixed with the liquid by pressurizing and injecting the supplied gas, and discharge that causes discharge in the gas pressurized in pressurization unit 11 Unit 3, voltage application unit 4 that applies a pulsed high voltage to discharge unit 3, and defoaming unit 14 that removes large bubbles among bubbles mixed in pressurization unit 11 by gas removal unit 18, A pressure reducing unit 15 that gradually reduces the pressure of the liquid after removing the large bubbles by the defoaming unit 14 to the atmospheric pressure without generating large bubbles, and the liquid sent out after the pressure is reduced (that is, created by the present invention) Functional fluid) ; And a mist generating unit 9 for discharging to the outside Te.

  Each part is connected in the flow path 16 so as to communicate in this order from the upstream side to the downstream side. The flow path 16 on the downstream side of the pressurizing unit 11 is preferably formed of a tube having an inner diameter of about 2 to 50 mm. As a result, the gas-liquid mixed solution can be discharged with a relatively thick channel cross-sectional area, preventing clogging of the piping as in the case where the channel 16 is constituted by a narrow path, and the gas-liquid mixture is used. Easy to do.

  The pressurizing unit 11 includes a gas-liquid mixing tank 23 in a sealed tank shape. This gas-liquid mixing tank 23 is a mixture of gas and liquid under high-pressure conditions. The liquid supplied with gas is pressurized at a pressure rate ΔP1 / t (ΔP1: pressure increase amount, t of 0.17 MPa / sec or more). : Time) and the pressure of the liquid is set to 0.15 MPa or more to produce a gas-liquid mixture of bubbles having a strong interface structure in a batch system.

  As described above, the liquid and gas are sent out to the gas-liquid mixing tank 23 which is a closed system in a batch manner and pressurized, and the liquid Lq is stirred by the stirring blade 24 provided in the gas-liquid mixing tank 23 or the like. And the gas are mixed under high pressure conditions, the pressure of the gas forming the bubbles becomes 0.12 MPa or more, and the gas can be stabilized as fine bubbles.

  The discharge unit 3 in the gas-liquid mixing tank 23 may be, for example, a corona discharge device 6 as shown in FIG. 2 or a microplasma generator 30 as shown in FIG.

  The corona discharge device 6 of FIG. 2 is formed by a needle-like discharge electrode 7 and a ring-like counter electrode 8 disposed at a position facing the sharp tip portion 7a of the discharge electrode 7. When a voltage is applied between the electrodes 7 and 8 by the voltage application unit 4, a discharge is generated in the gas pressurized in the gas-liquid mixing tank 23 to generate various effective components. The configuration of the corona discharge device 6 is not limited to this. For example, at least the facing portions of the discharge electrode 7 and the counter electrode 8 are formed in a mesh shape, and the counter electrode 8 is formed in a flat plate shape. The form can be selected.

  3 has a suction port 32 and a discharge port 33 opened on the outer surface of a main body case (not shown) that forms the outer shell of the entire device, and the suction port 32 and the discharge port are formed in the main body case. An air passage 34 communicating with the air passage 33 is formed so as to penetrate therethrough. In the air passage 34, the air blower 35 is disposed on the upstream side, and the discharge generator 36 is disposed on the downstream side. The blower unit 35 is composed of a blower fan. By rotating the blower fan, the pressurized gas in the gas-liquid mixing tank 23 is introduced into the air passage 34 from the suction port 32 and discharged from the discharge port 33.

  The discharge generating part 36 is of a hollow cathode type as shown in the figure, and a plate-like metal electrode part 38 that is also plate-like is disposed in close contact on both sides in the thickness direction of the plate-like insulating spacer 37. The insulating spacer 37 is sandwiched between a pair of electrode portions 38. The pair of electrode portions 38 are electrically connected via the voltage application portion 4, and a pulsed high voltage is applied between the electrode portions 38. The insulating spacer 37 and the electrode portion 38 are respectively provided with through holes 40 and 49 penetrating in the thickness direction, and the insulating spacer 37 and the electrode portion 38 are in close contact with each other so that the through hole 40 of the insulating spacer 37 and the electrode portions on both sides are provided. 38 through-holes 49 communicate with each other in the thickness direction.

  The diameter of the through hole 40 of the insulating spacer 37 is set to a very small diameter of about several hundred μm. As for the hole diameters of the through holes 49 of the electrode portions 38 on both sides, the hole diameter of the upstream through hole 49 is set to be the same as the hole diameter of the through hole 40 (that is, about several hundred μm). Is larger than the hole diameter of the through hole 40. Alternatively, the downstream side through hole 49 may be provided to have the same diameter as that of the through hole 40 so that the through hole 49 and the through hole 40 on both sides communicate with each other in a straight line.

  In the microplasma generator 30 configured as described above, a pressurized gas is introduced into the air passage 34 by the blower 35 and blown toward the discharge generator 36, and the electrode of the discharge generator 36 is supplied by the voltage application unit 4. A high voltage is applied between the portions 38. By applying this high voltage, discharge is started in the through hole 40 of the insulating spacer 37 provided in the discharge generating portion 36, and micrometer-sized plasma (hereinafter referred to as “microplasma”) is generated in the through hole 40. Produced with high density. The microplasma discharge in the through-hole 40 generates an active ingredient at a higher density than the corona discharge. In other words, in this example, a minute discharge space S along the insulating spacer 37 is formed by the through-hole 40 having a hole diameter of about several hundred μm, and microplasma discharge is generated in the discharge space S. .

  The pressurized gas sent toward the discharge generator 36 on the downstream side by the blower 35 is introduced into the through holes 40 and 49 of the discharge generator 36 in a straight line, and the periphery of the discharge generator 36. The flow is diverted to the flow that detours. The pressurized gas introduced into the through holes 40 and 49 of the discharge generating part 36 efficiently carries out the active component generated in the through hole 40 at a high density to the downstream side. Further, the pressurized gas that bypasses the periphery of the discharge generating part 36 flows down along the flat plate surface and the outer peripheral surface of the upstream electrode unit 38 and the outer peripheral surface and the flat plate surface of the downstream electrode unit 38, It flows down while efficiently removing the heat of both electrode portions 38.

  The branched flow joins on the downstream side of the discharge generating part 36 and is discharged through the discharge port 33 after having a sufficient flow rate after joining. The active ingredient generated in large quantities by the microplasma discharge of the discharge generating unit 36 riding on this discharge wind is discharged vigorously into the gas-liquid mixing tank 23.

  As described above, according to the microplasma generator 30, a large amount of effective components are generated by the microplasma discharge in the discharge space S while efficiently radiating the electrodes 38 and the insulating spacers 37 of the discharge generator 36 by blowing air. Can be generated. In addition, a large amount of the active ingredient produced here is efficiently conveyed from the inside of the through hole 40 to the downstream side by air blowing, and merged with the air blowing that is diverted to take heat away from the outer surface of the electrode part 38 and the insulating spacer 37. In addition, it can be discharged to the outside with a sufficient air volume.

  Even in the microplasma generator 30, the discharge is generated in the pressurized gas in the gas-liquid mixing tank 23, which is the pressurizing unit 11. An active ingredient can be produced at a high concentration.

  By the way, the microplasma generator 30 includes an electrode portion 38 and an insulating spacer 37 disposed in close contact with or in the vicinity of the electrode portion 38, and by applying a high voltage to the electrode portion 38, an insulating spacer is provided. As long as the microplasma discharge is generated in the minute discharge space S formed along the line 37, various modifications can be applied.

  As a modification, for example, it is conceivable that a gap is interposed between the insulating spacer 37 and the electrode portion 38 with a substantially uniform width of about several hundred μm. In this case, the gap having the very small width communicates with the surrounding air passage 34 at the outer peripheral edge portion and communicates with the through hole 40 of the insulating spacer 37 at the central portion. When a high voltage is applied to the electrode unit 38 by the voltage application unit 4, microplasma discharge occurs in the gap as well as the through hole 40 of the insulating spacer 37. That is, in the case of this modification, a micro discharge space S is formed along the insulating spacer 37 even in the gap, and microplasma discharge is generated.

  As another modification, it is conceivable to form the discharge generating portion 36 by arranging the electrode portion 38 close to or in close contact with only one of the upstream side and the downstream side of the insulating spacer 37. Even in this case, in the through hole 40 of the insulating spacer 37 (in the case where a gap is provided between the insulating spacer 37 and the electrode portion 38, the gap is further provided), a small discharge space S along the insulating spacer 37 is formed. As a result, a microplasma discharge occurs.

  In any of the modifications, the air passage 34 is formed so that the pressurized gas sent from the upstream side to the discharge generation unit 36 is divided and passes through the discharge space S and the outer peripheral surface of the electrode unit 38 together. It is preferable. As a result, it is possible to achieve both the sequential delivery of effective components generated in large quantities in the discharge space S to the downstream side and efficient heat dissipation of the high temperature electrode section 38, so that a large amount of effective components can be stabilized for a long time. Thus, it can be generated and discharged.

  2 and 3, the effective components generated by the discharge are components such as nitrate ions, superoxide radicals, hydroxy radical radicals, and ozone, but from the gas supply path 12. By appropriately selecting the type of gas to be supplied and the discharge conditions in the discharge unit 3, the type and concentration of the active ingredient can be controlled. As a gas to be supplied from the gas supply path 12 into the gas-liquid mixing tank 23, a suitable gas such as air, carbon dioxide, nitrogen, oxygen, ozone, argon, hydrogen, helium, methane, propane, or butane is used alone or mixed. Can be supplied.

  For example, when a discharge is generated in nanobubbles made of air, each of the above components can be generated as an effective component, and when a discharge is generated in nanobubbles made of methane or oxygen, In addition to the components, methanol, formic acid and the like can be produced in large quantities. With this methanol and formic acid, a further sterilizing effect can be obtained. In addition, when discharge is generated in nanobubbles made of nitrogen or ozone, superoxide radicals and hydroxy radicals can be produced in a larger amount as active ingredients.

  And after removing a big bubble from the gas-liquid mixture in which the bubble containing an active ingredient exists through the degassing part 14, this gas-liquid mixture is sent out to the decompression part 15, and the pressure is 2000 MPa / sec or less at the maximum decompression speed. The pressure is reduced to atmospheric pressure at a pressure reduction rate ΔP2 / t (ΔP2: amount of pressure reduction, t: time) and sent to the mist generator 9 as a gas-liquid mixed liquid containing nanobubbles (ie, a functional liquid in the present invention).

  The functional liquid produced here contains nanobubbles at a high concentration, and therefore has remarkable characteristics. Specifically, the nanobubbles generated in the present invention are very fine, and the characteristics that the gas can be held at a high concentration above its saturated dissolution concentration and buoyancy do not work. Therefore, it has the property that it can be stably present in the liquid for a long period of time, and the hydrogen bond distance at the bubble interface is short and the internal pressure of the bubble is increased, so that high concentration nanobubbles can be stably held. Have.

  And by making various active ingredients exist in the nanobubble of such a characteristic, the functional liquid which hold | maintains an active ingredient in very high concentration stably is created.

  Note that a plurality of gas-liquid mixing tanks 23 forming the pressurizing unit 11 may be provided to pressurize a plurality of times. By pressurizing the liquid a plurality of times while feeding the liquid, it is possible to strongly pressurize the liquid and generate a gas-liquid mixture having a strong bubble interface structure.

  The basic configuration of the functional mist generating apparatus of this example has been described above. Below, the further detailed structure of each part which comprises the function mist production | generation apparatus of this example is explained in full detail based on FIGS.

  The defoaming portion 14 removes relatively large bubbles from the liquid mixed with gas as described above, and is a tube body that lifts and removes bubbles by its own buoyancy. Can be configured. Since the removed bubbles become gas and accumulate on the upper part, the removed gas can be removed by the gas removing unit 18 such as a valve. Bubbles that rise due to buoyancy are micro-order sizes, that is, bubbles with a diameter exceeding 1 μm. By removing such relatively large bubbles and the presence of nanobubbles, which are fine bubbles, in the liquid, A stable gas-liquid mixture with high internal pressure can be obtained.

  Specifically, the degassing part 14 can be configured as shown in FIG. In FIG. 4 (a), it is formed so as to be in a posture that is substantially horizontal (on a plane substantially perpendicular to the direction of gravity) on the ground surface continuously with the gas-liquid mixing tank 23, and the bubbles B in the liquid Lq are formed. An example of a tubular body in which bubbles B are removed by raising the liquid surface by the buoyancy is shown. FIG. 4B shows that the shape that is continuous with the gas-liquid mixing tank 23 and combined with the gas-liquid mixing tank 23 is a reverse L-shape when viewed from the front, and the flow direction of the liquid Lq is downward. An example of a tubular body in which the bubbles B are removed by raising the bubbles B in the liquid Lq to the liquid level by the buoyancy by setting (substantially the same direction as the gravity direction) is shown. In FIG. 4 (c), the liquid Lq is separated from the gas-liquid mixing tank 23, and the flow direction of the liquid Lq is set downward (substantially the same direction as the direction of gravity). The example of the tubular body which raised to the surface and removed the bubble B is shown.

  The decompression unit 15 is provided on the downstream side of the defoaming unit 14, and when the gas-liquid mixture in a pressurized state is sent out, the decompression unit 15 gradually reduces the pressure to atmospheric pressure and then discharges the mixture. It is provided to do. The pressure reducing unit 15 is provided because the liquid mixed with the gas by pressurization as described above is in a high pressure state. This is because bubbles in the liquid mixture may be combined and discharged from the liquid, or cavitation may occur.

  The depressurization unit 15 is configured to depressurize the upper limit of the depressurization speed ΔP2 / t (ΔP2: depressurization amount, t: time) over the entire area of the piping while sending a liquid mixed with gas. Yes. Thereby, it is possible to take out the gas-liquid mixture without erasing or coalescing the nanobubbles while maintaining a strong bubble interface structure.

  Specifically, the decompression unit 15 can be configured as shown in FIG. That is, the decompression unit 15 may be configured by the flow path 16 whose flow path cross-sectional area gradually decreases as shown in FIG. 5A, or the flow path cross-sectional area as shown in FIG. 5B. May be constituted by the flow path 16 that gradually decreases gradually. Further, the pressure reducing unit 15 gradually reduces the pressure of the gas-liquid mixture from the high pressure state (P1) to (P2, P3,...) Atmospheric pressure (Pn) as shown in FIG. Alternatively, the flow path 16 may be configured with the flow path length (L) adjusted, or may be configured with a plurality of pressure adjusting valves 19 provided in the flow path 16 as shown in FIG. Good.

  For example, when the decompression unit 15 as shown in FIG. 5A or FIG. 5B is used, the flow path 16 upstream of the decompression unit 15 has an inner diameter of 20 mm, and the decompression unit 15 has a flow path length of 20 mm. About 1 cm to 10 m, the inner diameter of the tube gradually decreases from 20 mm to 4 mm, so that the channel cross-sectional area can be reduced. In addition, the decompression part 15 can set an inlet inner diameter / outlet inner diameter = about 2-10, and can set the inner diameter reduction | decrease value per cm to about 1-20 mm. At this time, when the gas-liquid mixture is sent to the decompression unit 15 at a flow rate of 4 × 10 −6 m / s or higher, the pressure can be reduced by 1.0 MPa at a maximum decompression speed of 2000 MPa / sec or less without erasing the nanobubbles. And the gas-liquid mixture can be depressurized to atmospheric pressure.

  The mist generating part 9 discharges the functional liquid, which is a decompressed gas-liquid mixture, into a mist. As shown in FIG. 6, an extension channel 20 may be provided between the mist generating unit 9 and the pressure reducing unit 15 in order to ensure a sufficient liquid pressing pressure in the pressure applying unit 11. At this time, after calculating the total pressure loss including the decompression unit 15, the difference between the pushing pressure required to pressurize the liquid and gas in the gas-liquid mixing tank 23 and the total pressure loss is calculated. Further, an extension channel 20 whose channel length is adjusted so that a pressure loss is generated by the difference is added to the channel 16. In order to secure the indentation pressure, it may be possible to provide a throttling portion or the like. However, when the indentation pressure is adjusted by the throttling portion or the like, there is a possibility that the bubbles collapse due to a sudden pressure change. On the other hand, when the extension flow path 20 is provided, the gas-liquid mixed liquid in a state in which bubbles are stabilized can be supplied to the mist generating unit 9 as a functional liquid.

  As the mist generating unit 9, any of the apparatuses shown in FIGS. 7 to 10 can be used. FIG. 7 shows a spray device 10 that mists the functional liquid using wind pressure, and FIG. 8 shows that the functional liquid is electrostatically atomized by applying a voltage to the functional liquid. It is the electrostatic atomizer 13 which makes mist. Further, what is shown in FIG. 9 is an ultrasonic spray device that mists the functional liquid by ultrasonic vibration, and what is shown in FIG. 10 is a surface acoustic wave spray device that atomizes the functional liquid by surface elastic waves. .

  The spray device 10 shown in FIG. 7 has a tank-like functional liquid reservoir 50 that stores the functional liquid that is generated and sent out through the flow path 16 of the functional mist generator, and an appropriate amount of functional liquid in the functional liquid reservoir 50. A narrow tubular conveyance path 51 that conveys to the tip, a pressure source 52, a blower path 55 that gives the wind pressure from the pressure source 52 to the functional liquid conveyed to the tip of the conveyance path 51, and a pressure source 52 And a wall portion 53 to which the functional mist atomized by the wind pressure blows. The functional mist sprayed on the wall portion 53 becomes a smaller functional mist and is discharged to the external space. Reference numeral 54 denotes a reflux portion that returns a part of the functional mist that has hit the wall portion 53 to the functional liquid storage portion 50.

  According to this spraying apparatus 10, the produced | generated functional liquid can be sequentially atomized with a wind pressure, and can be discharge | released to external space after setting it as a functional mist. Here, the functional mist generated by atomizing the functional liquid of the present invention holds the active ingredient at a very high concentration.

  Because, as described above, the functional liquid produced in the present invention holds the active ingredient at a very high concentration and stably, the functional mist formed by atomizing this functional liquid is the active ingredient. This is because it becomes a cause of maintaining a very high concentration.

  The electrostatic atomizer 13 shown in FIG. 8 has a tank-like functional liquid reservoir 60 that stores the functional liquid generated and sent out through the flow path 16 of the functional mist generator, and functions in the functional liquid reservoir 60. A discharge electrode 61 that transports an appropriate amount of liquid to the tip thereof and a voltage application unit 62 that applies a high voltage to the discharge electrode 61 are provided. In the illustrated example, an electrode 63 is provided at a location facing the discharge electrode 61, and a high voltage is applied to the discharge electrode 61 between the electrode 63, but a high voltage is applied to the discharge electrode 61 without the electrode 63. It may be configured to apply a voltage.

  The charged fine particle water generated by applying a high voltage to the functional water at the tip portion of the discharge electrode 61 becomes a functional mist, and is discharged to the external space. The functional mist generated here also retains the active ingredient at a very high concentration.

  The ultrasonic spraying device shown in FIG. 9 has a tank-like functional liquid reservoir 70 that stores the functional liquid that is generated and sent out through the flow path 16 of the functional mist generator, and the functional liquid in the functional liquid reservoir 70. On the other hand, an ultrasonic transducer 71 that applies ultrasonic vibration and a power supply unit 72 that supplies electric power to the ultrasonic transducer 71 are provided. The mist generated by ultrasonically vibrating the functional water becomes a functional mist and is released to the external space. The functional mist generated here also retains the active ingredient at a very high concentration.

  The surface acoustic wave spraying device shown in FIG. 10 has a tank-like functional liquid reservoir (not shown) that stores the functional liquid that is generated and sent out through the flow path 16 of the functional mist generator, and the inside of the functional liquid reservoir. A substrate unit 80 on which a functional liquid is transported to the surface by an appropriate amount, a vibrator 81 that generates surface acoustic waves on the substrate unit 80, and a high-frequency power source 82 that supplies power to the vibrator 81 are provided. The mist generated by applying the surface acoustic wave to the functional water on the substrate unit 80 becomes a functional mist and is released to the external space. The functional mist generated here also retains the active ingredient at a very high concentration.

  In addition, in the mist generating part 9 of each form shown in FIGS. 7-10, there exist the following advantages, respectively. That is, for example, as shown in FIG. 7, the spray device 10 that uses wind pressure has an advantage that it is easy to generate a functional mist with a large capacity, and the electrostatic atomizer 13 shown in FIG. If so, there are advantages that the particle diameter of the functional mist can be easily controlled and that the functional mist can be released in a charged state. In addition, the ultrasonic spray device shown in FIG. 9 and the surface acoustic wave spray device shown in FIG. 10 have the advantage that the mist generator 9 and thus the entire functional mist generator can be made compact.

  As described above, in the functional mist generating apparatus of the present example, the liquid is pumped to the gas-liquid mixing tank 23 forming the pressurizing unit 11, and the gas supplied from the gas supply path 12 to the pumped liquid. Inject. Then, the liquid into which the gas is injected is pressurized at a pressure rate ΔP1 / t (ΔP1: pressure increase amount, t: time) of 0.17 MPa / sec or more, and the pressure of the liquid is set to 0.15 MPa or more. That is, the pressure of the liquid when being sent out from the gas-liquid mixing tank 23 to the defoaming portion 14 is 0.15 MPa or more. Thereafter, bubbles exceeding the nano size in the gas-liquid mixed solution are removed by the defoaming portion 14, and further, the pressure is reduced to a maximum pressure reduction rate of 2000 MPa / sec or less ΔP2 // while the liquid is sent to the pressure reduction portion 15 and the downstream flow path 16. The pressure is gradually reduced to atmospheric pressure at t (ΔP2: reduced pressure amount, t: time). By this step, a gas / liquid mixed liquid in which desired nanobubbles are stably present at a high concentration is generated, and this is further misted as a functional liquid, whereby the functional mist can be released to the outside.

  In the following, as an example of a gas-liquid mixed liquid in which nanobubbles composed of a gas having a pressure of 0.12 MPa or more exist, pure water is used as the liquid, and any of nitrogen, hydrogen, methane, argon, and carbon dioxide is used as the gas. Of [gas amount], [bubble size], [bubble internal pressure], [hydrogen bond distance], [bubble distribution amount], [gas-liquid mixture stability] Each characteristic will be described in detail with reference to FIGS.

[Gas volume]
The amount of gas present as bubbles in a gas-liquid mixture using pure water as a liquid and nitrogen, hydrogen, methane, argon, or carbon dioxide as a gas was measured by the following method.
(1) Various gases were mixed with pure water having a conductivity of 0.1 μS / cm at 25 ° C. to obtain a gas-liquid mixture.
(2) In order to separate large bubbles having a diameter of 1 μm or more from water, the gas-liquid mixture was allowed to stand at 25 ° C. for 1 day. As for the standing time, from the Stokes' law, the bubble rising speed: V = d2 × g / (18 × γ)
(D: bubble diameter, g: gravitational acceleration, γ: kinematic viscosity coefficient)
From this equation, the rate of rise of bubbles of 1 μm is about 2.4 × 10 −4 m / s. For example, when the water depth of the container at the time of standing is 50 mm, Can be removed.
(3) The mass of the gas-liquid mixture was measured with an analytical balance having a minimum measured value of 1 mg.
(4) Gas-liquid mixture and stirrer of stirrer are placed in a PE + nylon resin vinyl bag with low gas permeability and moisture permeability, and the vinyl bag is sealed with a sealer in a state where there is no air in the bag. .
(5) Immediately after sealing, the mass of the vinyl bag in which the gas-liquid mixture was sealed was measured with an analytical balance.
(6) The vinyl bag in which the gas / liquid mixture at 25 ° C. was sealed by a hot stirrer was heated to 45 ° C., and the gas / liquid mixture was stirred for about 5 hours. By this temperature rise and stirring, fine bubbles and gas dissolved at a saturated dissolution concentration of 45 ° C. or higher were separated from the gas-liquid mixture and collected on the top of the vinyl bag.
(7) The set temperature of the hot stirrer was set to 25 ° C. at room temperature of 25 ° C., and the mixture was stirred for several hours so as to become a liquid having a saturation solubility of 25 ° C.
(8) Using an analytical balance, the mass of the vinyl bag in which gas and liquid were enclosed was measured.
(9) The mass of the gas-liquid mixture and the amount of change in the mass of the liquid caused by the buoyancy caused by the gas separated from the gas-liquid mixture by heating and stirring were obtained from three mass measurements. The mass change amount is the same as the mass of air having the same volume as the gas volume separated from the gas-liquid mixture, and the volume and mass of the separated gas can be calculated from this value.

  FIG. 11 is a graph showing the gas volume measured in this way. The lower region of each bar graph is the amount of gas that was present as the measured bubble, and the upper region is the saturated amount of gas that follows Henry's law. As shown in the graph, for example, in the case of a gas-liquid mixture using hydrogen and water, 17.6 mL of hydrogen is dissolved in 1 L of pure water at 25 ° C. as a saturated dissolution amount, and 528 mL of gas exists as fine bubbles. It was confirmed. That is, the amount of gas contained in the gas-liquid mixture was about 30 times the amount of supersaturated dissolution. Similarly, the amount of gas contained in the gas-liquid mixture with respect to the supersaturated dissolution amount was about 36 times for nitrogen, about 17 times for methane, about 16 times for argon, and about 1.9 times for carbon dioxide. . Thus, the gas-liquid mixed liquid having nanobubbles can hold gas in the liquid at a high concentration equal to or higher than the saturated dissolution concentration.

[Bubble size]
A gas-liquid mixture produced in the same manner as above was instantly frozen, cleaved with a cutter in a vacuum, and methane / ethylene flowed through the fractured surface to discharge, producing a hydrocarbon film (replica film) with transferred irregularities. . A conductive osmium thin film was applied to the replica film, dried sufficiently, and observed with a scanning electron microscope (SEM). FIG. 12 is a first example of a photograph observed by SEM for a gas-liquid mixture of nitrogen and pure water. Similarly, by observing photographs, it was confirmed that when nitrogen, hydrogen, methane, argon, carbon dioxide was used as the gas, the bubble size of the gas-liquid mixture was 100 nm in diameter distribution peak. The bubbles in the gas-liquid mixture of the above gas and pure water could not be accurately detected by a particle size distribution measuring apparatus such as a dynamic scattering method using a laser.

[Internal pressure of bubbles]
The pressure inside the bubbles was calculated from the total amount of gas in the gas-liquid mixture. Table 1 below shows the total amount of gas and the internal pressure of bubbles calculated from the total amount of gas in a gas-liquid mixture of nitrogen, methane, or argon and pure water at 25 ° C.

The internal pressure of the gas in the bubble here is calculated by the following method.
The equation of state of gas is
PV / T = (const)
(P: internal pressure, V: volume, T: internal temperature)
When T is constant, PV = (const)
It is represented by

And the volume of bubbles in the gas-liquid mixture can be calculated from the density of the gas-liquid mixture,
The relationship of atmospheric pressure × total gas volume = bubble internal pressure × total gas volume in liquid is established, and the internal gas pressure in the bubbles is calculated by applying the above measured gas amount to this relational expression. The pressure value is as follows.

  For example, when the gas is nitrogen, assuming that the water volume is 1 liter and the gas volume in water is 2 liters in 1 liter of gas-liquid mixture, the following relational expression is established for the volume.

w1 + w2 = 1 liter (Formula A)
In addition, the following relational expression holds for the mass.

w1 × density of water + w2 ÷ 22.4 (liter) × 28 (molecular weight) = measured mass (Formula B)
Water density: 997.1g / L for pure water at normal temperature and pressure
22.4 liters: volume of 1 mol of gas Measured mass: 988.3 with the values in Table 1
Solving the above two equations (Equations A and B),
Since w2 = 8.84 × 10 ^ (-3) is calculated,
Internal pressure of gas = atmospheric pressure x total volume of gas ÷ total volume of gas in liquid
= 0.1 x (value in Table 1) / w2
= 0.1 × 0.56 ÷ (8.84 × 10 ^ (-3))
= 6.3 MPa
It becomes.

  In the above calculation, it was assumed that the internal temperature of the bubble was constant (normal temperature), but the actual internal temperature of the bubble is also expected to be higher than the atmospheric temperature (normal temperature). It can be predicted from the gas state equation that the pressure is higher than the above calculation result.

  By the way, in general, the internal pressure of bubbles is calculated as follows. The bubbles are pressurized by the interfacial tension between the gas-liquid interface, and this interfacial tension is derived by Young Laplace's equation (the following equation).

ΔP = 2σ / r
(ΔP: rising pressure, σ: surface tension, r: bubble radius)
According to this equation, for example, in the case of a bubble having a diameter of 100 nm, the bubble internal pressure is 3 MPa.

  On the other hand, the internal pressure in the gas-liquid mixed liquid is 6.3 MPa in the case of nitrogen, for example, as shown in Table 1. In this gas-liquid mixed liquid, bubbles having a diameter of 100 nm are dispersed as shown in the SEM photograph. Therefore, it was confirmed that the bubbles of the gas-liquid mixture had an internal pressure that was about twice or more the value calculated from the Young Laplace equation. Therefore, it can be concluded that a stronger interface structure is formed at the bubble interface.

  FIG. 13 is a conceptual explanatory diagram for explaining the mechanism by which the gas-liquid mixture is stabilized. As shown in the figure, a protective film M having a boundary film structure (crystal structure) is formed at the interface between the bubble B and the liquid Lq by bonding of strong water molecules such as ice or hydrate with a hydrogen bond distance shorter than usual. It is thought that the bubbles are stabilized because the mass transfer between the gas and liquid is blocked. The internal pressure of bubbles (nanobubbles) in the gas-liquid mixture of nitrogen, methane, and argon is about twice or more than the pressure obtained from the Young Laplace equation. As described above, the hydrogen bonding distance at the bubble interface is short and the internal pressure of the bubble is increased, so that the bubble becomes a stable gas-liquid mixture.

[Hydrogen bond distance]
FIG. 14 shows a difference between an infrared absorption spectrum of a gas-liquid mixed solution (nitrogen mixed water) using pure water as a liquid and nitrogen as a gas and nitrogen saturated water in which nitrogen is dissolved in pure water at a saturated dissolution concentration. It is a graph to show. It is known that the infrared absorption band due to OH contraction vibration of water usually has an absorption maximum in the vicinity of 3400 cm-1, but as shown in the graph, the absorption maximum of OH contraction vibration shifts to around 3200 cm-1. Yes. When the absorption maximum is at 3400 cm −1, the hydrogen bond distance is 0.285 nm. On the other hand, when the absorption maximum is 3200 cm −1, the hydrogen bond distance is known to be 0.277 nm, which is shorter than the normal hydrogen bond distance under normal temperature and normal pressure, and is structured ice or hide. It can be concluded that the water is close to the rate.

[Bubble distribution]
The amount of bubble distribution (number) was calculated from Table 1.

When the gas is nitrogen, the total amount of bubbles returned to the atmosphere (0.1 MPa) is 0.56 L, and the internal pressure of the bubbles is 6.3 MPa. Therefore, the total volume V1 of bubbles in water is assumed to change isothermally, PV From = const
V1 = 0.56 × 0.1 ÷ 6.3
It becomes.

Since the bubbles are spheres with a radius r = 50 nm, the volume V2 per bubble is
V2 = 4/3 × π × r ^ 3
It becomes.

  From the above, the number of bubbles per liter of water n = V1 ÷ V2 = 1.7 × 10 ^ 16 is calculated.

  Similarly, the number of bubbles per liter of water is calculated as 1.8 x 10 ^ 16 when the gas is methane and 1.7 x 10 ^ 16 when argon is used.

[Stability of gas-liquid mixture]
FIG. 15 shows the supersaturation as the ratio of gas abundance in the gas-liquid mixture with respect to the saturated dissolution concentration when the gas-liquid mixture produced by mixing air with pure water is sealed in a glass bottle and stored at a constant temperature. It is a graph to display. From the graph, it can be seen that the supersaturation level is 6 even after 400 hours and has hardly changed. Therefore, it was confirmed that the gas-liquid mixture of the present invention is very stable over a long period of time.

  Thus, the gas-liquid mixed liquid which can be obtained with a functional mist production | generation apparatus is what a nano bubble exists in a liquid, and the pressure of the gas which forms a nano bubble, ie, internal pressure, is 0.12 Mpa or more. Thus, the internal pressure of the bubbles is sufficiently higher than the atmospheric pressure (1 atm = 0.101 MPa) at room temperature (25 ° C.), and the bubbles are maintained at a high internal pressure. Therefore, a strong interface structure can be formed at the bubble interface, and the bubbles can exist stably without disappearing or coalescing in the liquid. In addition, since the pressure of the gas in the nanobubbles maintains a balance with the pressure from the liquid over a long period of time unless there is an external impact, the gas-liquid mixture in which the nanobubbles exist stably is maintained for a long period of time. It becomes possible to use it over. Note that once an impact is applied to the gas-liquid mixed solution, the nanobubbles are united and foamed by the force of the internal pressure, so this foaming can also be used.

  In other words, the nanobubbles generated by the functional mist generating device are different from the conventional bubbles stabilized by the surface tension.

  By setting the pressure of the gas forming the nanobubbles to a pressure higher than the internal pressure of the bubbles given by the Young Laplace formula, a stronger interface structure can be reliably formed. Moreover, in the gas-liquid mixed solution having nanobubbles, the concentration of the gas contained in the gas-liquid mixed solution can be set to be equal to or higher than the liquid saturated dissolution concentration. Thereby, the gas of high concentration contained in the liquid can be used, and the utility value of the gas-liquid mixture can be increased.

  In addition, as a gas-liquid mixed liquid, it is more preferable that a saturated amount of gas is dissolved in the liquid, and nanobubbles are present in the saturated dissolved liquid. If the gas is dissolved in the saturated dissolution amount, it becomes possible to stabilize the gas in the form of bubbles without dissolving them and hold them in the liquid as bubbles. In other words, a gas-liquid mixed solution in which a gas is present in excess of the saturated dissolution amount has a gas dissolved at a saturated concentration in the liquid, and the bubbles do not collapse or dissolve, and the bubbles are more stably contained in the liquid. Can exist. Furthermore, if the dissolved concentration of the gas forming the nanobubble is a saturated dissolved concentration, the pressure of the gas forming the bubble is increased and the structure of the bubble interface is strengthened, so that the nanobubble can be further stabilized. In addition, the action of various activities (physiological activity, detergency, etc.) becomes stronger, and the utility value can be further increased.

  In addition, since nanobubbles are very fine, it is possible to stabilize the internal pressure of bubbles and hold a high concentration gas in the liquid. In addition, since buoyancy does not act on the nanobubbles, the bubbles can exist stably over a long period of time. Even if the bubbles are smaller or larger than this range, the bubbles may not be stabilized. By the way, the liquid mixed with microbubbles is cloudy and can be discriminated visually. However, the liquid mixed with nanobubbles is colorless and transparent (or the color of the liquid when the liquid is colored).

  The liquid used for the gas-liquid mixture is preferably a liquid composed of molecules that form hydrogen bonds. In this case, the distance between the hydrogen bonds of the molecules present at the interface with the liquid nanobubbles is normal at room temperature. It is preferable that the distance is shorter than the distance between hydrogen bonds when the pressure is 25 ° C. and 1 atm (0.1013 MPa). A hydrogen bond is a bond that stabilizes the system in a molecule that has a high electronegativity atom and a hydrogen atom, because the hydrogen atom approaches the high electronegativity atom of another molecule. . In this case, the distance between the hydrogen bonds of the liquid at room temperature and normal pressure is shorter than the distance between the hydrogen bonds at room temperature and normal pressure around the nanobubbles present in the liquid forming the gas-liquid mixture, that is, at the bubble interface. It becomes a thing.

  In this way, when the gas-liquid mixture is present under normal temperature and normal pressure conditions, the hydrogen bond distance at the bubble interface is shorter than the normal hydrogen bond distance at normal temperature and normal pressure. It will be surrounded by liquid molecules that form strong hydrogen bonds. And the liquid molecule which formed this hydrogen bond turns into a firm shell, and encloses a nano bubble. This prevents the nanobubbles from collapsing even if they collide. Moreover, since it can counter with the stress from the inside of a nano bubble with respect to the pressure from a liquid, it can hold | maintain, without a nano bubble being extinguished or united in a liquid.

  The distance between hydrogen bonds of the liquid molecules at the interface with the nanobubbles can be set as appropriate depending on the liquid used, but when the distance between hydrogen bonds at room temperature and normal pressure is 100%, it may be 99% or less. preferable. When the hydrogen bond distance falls within this range, the nanobubbles can be surrounded and stabilized by a hard shell of hydrogen bonds. If the distance between hydrogen bonds is longer than this, the nanobubbles may not be stabilized and cannot be present. Considering the interatomic distance, the lower limit of the hydrogen bond distance is 95%.

  By the way, when the distance between hydrogen bonds is shortened, the state usually changes to a solid or hydrate crystal structure so that the water becomes ice. Short hydrogen bonds are formed, and normal hydrogen bonds are formed in other liquids. That is, at the bubble interface, a hard shell of liquid molecules is formed by hydrogen bonds with a short distance to prevent the nanobubbles from coalescing and disappearing. Fluidity is ensured at normal pressure. This makes it easy to use a liquid in which stable nanobubbles exist.

  In addition, when the liquid used for the gas-liquid mixture is water, water molecules can form a strong interface structure that absorbs the internal pressure of the nanobubbles at the interface of the nanobubbles, which can further stabilize the nanobubbles. it can. In addition, the functional liquid which consists of a gas-liquid mixed liquid at the time of using water in this way, ie, functional water.

  A water molecule is a hydrogen bond of O ... H, that is, a hydrogen bond formed between an oxygen atom of one water molecule and a hydrogen atom of another water molecule. When this is used, this hydrogen bond in the liquid is strengthened at the bubble interface, and the nanobubbles can be further stabilized. Furthermore, water can be obtained stably with abundant supply sources. In addition, since water in which nanobubbles are dispersed has a wide range of applications, a highly useful gas-liquid mixture can be obtained. The water is not limited to high-purity water, and any water can be used, including water and sewage systems, ponds, and seawater. That is, any material that contains water as a liquid may be used.

  The liquid is a liquid composed of molecules having at least one of (halogen) -H bond and SH bond such as OH bond, NH bond, FH bond and Cl-H bond. It is also preferable that there is. These liquids can form a strong interface structure that absorbs the internal pressure of the nanobubbles at the interface of the nanobubbles, and the nanobubbles can be further stabilized. These liquids are liquids having bonds between atoms and hydrogen atoms having sufficiently large electronegativity with respect to hydrogen atoms, such as OH ... O, NH ... N, FH ... F, and the like. Hydrogen bonds such as (halogen) -H ... (halogen) such as Cl-H ... Cl and SH ... S are formed, and the nanobubbles can be surrounded and stabilized by this hydrogen bond. A typical liquid having an O—H bond is water, but other examples include hydrogen peroxide, alcohols such as methanol and ethanol, and glycerin. Examples of the liquid having an N—H bond include ammonia. Examples of those having a (halogen) -H bond include HF (hydrogen fluoride) having an F-H bond and HCl (hydrogen chloride) having a Cl-H bond. Examples of those having an S—H bond include H 2 S (hydrogen sulfide).

  It is also preferable that the liquid is a liquid composed of molecules having a carboxyl group. Thereby, the liquid which has a carboxyl group can form the firm interface structure which absorbs the internal pressure of this nanobubble in the interface of nanobubble, and can stabilize nanobubble more. In addition, a carbonyl oxygen atom having a high electronegativity exists in the carboxyl group, and the carbonyl oxygen atom in the carboxyl group and a hydrogen atom in another carboxyl group form a hydrogen bond to surround the nanobubble. Therefore, a gas-liquid mixed solution in which nanobubbles exist stably can be obtained. Examples of the liquid composed of molecules having a carboxyl group include carboxylic acids such as formic acid and acetic acid.

  Further, in the gas-liquid mixture obtained in the present invention, when water is used as the liquid, the zeta potential becomes negative, and the area of the bubble interface existing in the volume of 1 cm 3 is about 0.6 m 2. Such characteristics can also be used.

  As described above, according to the gas-liquid mixed solution employed in the functional mist generating apparatus of this example, it is possible to cause the gas containing the active ingredient to exist in the liquid in an amount exceeding the saturation solubility. Further, since buoyancy does not work on nanometer-sized fine bubbles, bubbles containing the active ingredient can be stably present in the liquid for a long period of time. And by using the pressurization part 11 as a discharge location for generating an active ingredient, it is possible to produce an active ingredient at a high concentration even at a relatively low voltage.

  That is, it is possible to efficiently create a functional liquid composed of a gas-liquid mixed liquid containing an active ingredient at a very high concentration and in a stable state while reducing the required energy.

  In the above, an example function mist generating apparatus was explained in full detail. Below, the Example at the time of further deform | transforming the above-mentioned functional mist generator is described. Detailed description of the same configuration as described above will be omitted.

  In the modification shown in FIG. 16, the spray device 10 (see FIG. 7) that mists the functional liquid using wind pressure is used as the mist generating unit 9, and the spray device 10 and the pressurizing unit 11 provide the pressure source. 52 is shared.

  In this example, a pressure source 52 including a gas cylinder or a compressor is provided, and gas is supplied from the common pressure source 52 through the gas supply path 12 into the pressurizing unit 11 (gas-liquid mixing tank 23). Gas is supplied to the tip of the conveyance path 51 of the spraying device 10 through the air supply path 55 branched from the supply path 12. That is, the mist generating unit 9 including the spray device 10 that uses the wind pressure can use the pressure applied by the pressurizing unit 11 to mist the functional liquid.

  In the modification shown in FIG. 17, an electrostatic atomizer 13 (see FIG. 8) is used as the mist generating unit 9 to generate a mist by applying a voltage to the functional liquid to cause electrostatic atomization in the functional liquid. In use, the electrostatic atomizer 13 and the discharge unit 3 share voltage application means.

  In this example, the voltage application unit 4 (62) is provided as a common voltage application unit, and a high voltage is applied to the discharge unit 3 by the voltage application unit and the discharge electrode 61 of the electrostatic atomizer 13 is used. Apply high voltage to. That is, the voltage application unit 4 (62) provided in this example is shared by the means for applying a voltage to the discharge unit 3 and the unit for applying a voltage to the functional liquid by the mist generation unit 9. It has become.

  The present invention has been described above based on the embodiments shown in the accompanying drawings. However, the present invention is not limited to the embodiments of the above examples. It is possible to change the design of the above and to apply a combination of the configurations of the examples as appropriate.

DESCRIPTION OF SYMBOLS 3 Discharge part 4 Voltage application part 9 Mist generation part 11 Pressurization part 13 Electrostatic atomizer 30 Microplasma generator 37 Insulation spacer 38 Electrode part 62 Voltage application part S Discharge space

Claims (8)

  Pressurizing and injecting gas into the liquid generates a gas-liquid mixture in which nanometer-sized bubbles are mixed with the liquid, and discharge occurs in the gas under pressure in the pressurizing part. A mist that further mists a functional liquid composed of a gas-liquid mixed liquid generated by pressurizing and injecting a gas in which an active ingredient is generated by discharge. A functional mist generating device comprising a generator.   The liquid that forms the gas-liquid mixture is a liquid composed of molecules that form hydrogen bonds, and the distance between the hydrogen bonds of the molecules present at the interface with the bubbles of the liquid is that when the liquid is at normal temperature and pressure. The functional mist generating apparatus according to claim 1, wherein the functional mist generating apparatus is shorter than a hydrogen bond.   The functional mist generating apparatus according to claim 2, wherein the nanometer-sized bubbles forming the gas-liquid mixed liquid are formed of a gas having a pressure of 0.12 MPa or more.   The discharge part includes an electrode part and an insulating spacer disposed in close proximity to or near the electrode part, and a minute discharge space formed along the insulating spacer by applying a high voltage to the electrode part. The functional mist generating apparatus according to any one of claims 1 to 3, wherein the functional mist generating apparatus is a microplasma generating apparatus that generates a microplasma discharge.   The functional mist generating device according to any one of claims 1 to 4, wherein the mist generating unit mists the functional liquid using a pressure applied by a pressurizing unit.   The said mist generation | occurrence | production part is an electrostatic atomizer which produces a mist by producing an electrostatic atomization to this functional liquid by applying a voltage to a functional liquid, The any one of Claims 1-3 characterized by the above-mentioned. The functional mist generating device according to one item.   The discharge part includes an electrode part and an insulating spacer disposed in close proximity to or near the electrode part, and a minute discharge space formed along the insulating spacer by applying a high voltage to the electrode part. A microplasma generator that generates a microplasma discharge inside, and the mist generator is an electrostatic atomizer that generates electrostatic atomization in the functional liquid by applying a voltage to the functional liquid. The function mist production | generation apparatus as described in any one of Claims 1-3 characterized by the above-mentioned.   8. The voltage applying unit is commonly used as a unit for applying a voltage to the discharging unit and a unit for applying a voltage to the functional liquid at the mist generating unit. The functional mist generator described.