WO2018003557A1 - Mist-generating device, mist-generating method, and sterilization/deodorization method - Google Patents

Mist-generating device, mist-generating method, and sterilization/deodorization method Download PDF

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Publication number
WO2018003557A1
WO2018003557A1 PCT/JP2017/022377 JP2017022377W WO2018003557A1 WO 2018003557 A1 WO2018003557 A1 WO 2018003557A1 JP 2017022377 W JP2017022377 W JP 2017022377W WO 2018003557 A1 WO2018003557 A1 WO 2018003557A1
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Prior art keywords
mist
ozone
ufb
containing liquid
liquid
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PCT/JP2017/022377
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French (fr)
Japanese (ja)
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山本　真樹
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シャープ株式会社
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
    • A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/10—Preparation of ozone

Definitions

  • Embodiment of this invention is related with a mist production
  • Embodiments of the present invention also relate to a mist generation method and a sterilization / deodorization method.
  • ozone gas is a gas and cannot be used in an open environment.
  • ozone gas is taken into the alveoli of the human body by breathing and may adversely affect the human body.
  • ozone water a method of spraying water in which ozone is dissolved
  • ozone water a method of spraying water in which ozone is dissolved
  • Patent Document 1 discloses ozone water whose ozone holding power is improved by containing ozone in the form of fine bubbles. Patent Document 1 describes that a sufficient ozone concentration is maintained for one month or longer.
  • Bubbles with a diameter of about 10 ⁇ m to 60 ⁇ m are called “micro bubbles”, and bubbles with a diameter of 1 ⁇ m or less are called “ultra fine bubbles (UFB)”.
  • UFB ultra fine bubbles
  • bubbles having a diameter of 1 ⁇ m or less are referred to as “UFB”
  • a liquid containing UFB is referred to as “UFB-containing liquid”
  • ozone UFB-containing liquid a liquid containing UFB containing ozone gas
  • an ozone UFB-containing liquid is obtained by applying a physical stimulus to microbubbles to generate UFB.
  • the inventor of the present application has made various studies on a method for sterilization and deodorization by spraying an ozone UFB-containing liquid as a mist on an object.
  • the mist sprayed on the object does not have sufficient sterilizing power and ozone concentration by simply using the ozone UFB-containing liquid (the sterilizing power and ozone concentration of the original ozone UFB-containing liquid are not sufficiently maintained). I found out there was a fear.
  • Embodiments of the present invention have been made in view of the above problems, and the object thereof is a mist generating apparatus and a mist generating method capable of spraying a mist having sufficient sterilizing power and / or ozone concentration onto an object. Is to provide.
  • a mist generating apparatus includes a storage unit that stores an ozone UFB-containing liquid that is a liquid containing an ultrafine bubble containing ozone gas, and a mist that contains the ozone UFB-containing liquid stored in the storage unit.
  • a mist generating unit that sprays as a mist having an average diameter of 10 ⁇ m to 1000 ⁇ m.
  • Another mist generating apparatus generates an ozone UFB-containing liquid that is a liquid containing an ozone gas generating unit that generates ozone gas and an ultrafine bubble that includes the ozone gas generated by the ozone gas generating unit.
  • the mist generating device further includes a storage unit that stores the ozone UFB-containing liquid generated by the ozone UFB-containing liquid generating unit.
  • a mist generation method is a mist generation method for generating mist from a liquid, the step (A) of preparing an ozone UFB-containing liquid that is a liquid containing ultrafine bubbles including ozone gas, and Spraying the ozone UFB-containing liquid as a mist having a mist average diameter of 10 ⁇ m or more and 1000 ⁇ m or less.
  • the step (A) includes the step (A-1) of generating the ozone gas, and the step of generating the ozone UFB-containing liquid using the ozone gas generated in the step (A-1). (A-2).
  • the object is sterilized and / or deodorized by spraying the mist on the object using the mist generation method.
  • a mist generating apparatus and a mist generating method capable of spraying a mist having a sufficient sterilizing power and / or ozone concentration onto an object are provided.
  • FIG. 1 is a diagram schematically showing a sterilization / deodorization system 1 according to an embodiment of the present invention. It is a figure which shows typically a mode that the ozone UFB containing liquid 7 is mist-ized by the sterilization and deodorizing system 1.
  • FIG. It is a graph which shows the relationship between mist average diameter [micrometer], ozone concentration decreasing rate [%], and Escherichia coli survival rate. It is a graph which shows the relationship between mist average diameter [micrometer] and ozone concentration decreasing rate [%].
  • the inventor of the present application conducted a sterilization / deodorization method for spraying an ozone UFB-containing liquid as a mist on an object under various conditions, and performed detailed studies on the sterilization power and ozone concentration of the mist.
  • the mist size centimeter average diameter
  • the mist has sufficient sterilizing power and ozone concentration (the sterilizing power and ozone concentration of the original ozone UFB-containing liquid are sufficiently maintained.
  • This invention is made
  • the mist generation method in this embodiment includes a step (A) of preparing an ozone UFB-containing liquid that is a liquid containing UFB containing ozone gas, and a step (B) of spraying the ozone UFB-containing liquid as a mist on an object. Is included.
  • the bubbles contained in the ozone UFB-containing liquid prepared in step (A) contain bubbles having a diameter of 1 ⁇ m or less, that is, UFB.
  • UFB-containing liquid means a liquid having an arithmetic average value of the diameter of contained particles (including bubbles) of 1 ⁇ m or less.
  • the average diameter of the mist sprayed in step (B) is set within a specific range. Specifically, the mist average diameter (details will be described later for the definition) is not less than 10 ⁇ m and not more than 1000 ⁇ m.
  • the “mist average diameter” means not a value at the position of the spray port but a value at the position of the object.
  • the ozone UFB-containing liquid is sprayed on the object as a mist having a mist average diameter of 10 ⁇ m or more and 1000 ⁇ m or less.
  • the sterilizing power and ozone concentration of the mist can be sufficiently increased (the sterilizing power and ozone concentration of the original ozone UFB-containing liquid can be sufficiently maintained).
  • step (A) an ozone UFB-containing liquid may be prepared. That is, step (A) includes, for example, a step (A-1) for generating ozone gas, and a step (A-2) for generating an ozone UFB-containing liquid using the ozone gas generated in step (A-1). May be included. Alternatively, a prepared ozone UFB-containing liquid may be obtained in step (A).
  • the mist generating method in this embodiment is preferably used for a sterilization / deodorization method.
  • the object By spraying the mist onto the object using the mist generating method of the present embodiment, the object can be sterilized and / or deodorized.
  • FIG. 1 is a diagram schematically showing a sterilization / deodorization system 1.
  • the sterilization / deodorization system 1 includes a two-fluid nozzle 2, a liquid feed pump 3, a compressor 4, a pressure gauge 5, and a pressure reducing valve (pressure adjusting valve) 6, as shown in FIG.
  • the sterilization / deodorization system 1 sprays the ozone UFB-containing liquid 7 on the object 9 as a mist 8 from the two-fluid nozzle 2.
  • the object 9 is, for example, a restaurant appliance, various articles in the home, a part of the human body (for example, a hand), or the like.
  • the ozone UFB-containing liquid 7 there are many bubbles (UFB) having a diameter of 1 ⁇ m or less containing ozone gas.
  • the diameter of bubbles in the liquid is about 10 ⁇ m to 60 ⁇ m (that is, in the case of microbubbles)
  • such bubbles (microbubbles) slowly rise in the liquid and contract and disappear.
  • most of the bubbles containing ozone gas are bubbles (UFB) having a diameter of 1 ⁇ m or less, and exist very stably in the liquid.
  • the two-fluid nozzle 2 is a spray nozzle that mixes and blows out compressed air and liquid divided into two systems.
  • the two-fluid nozzle 2 can control the average diameter of the mist 8 by controlling the air pressure and the liquid pressure.
  • the two-fluid nozzle 2 is suitable for miniaturization of the mist 8 because the liquid is pulverized and misted by a high-speed airflow of compressed air.
  • an internal mixed internal gas type method can be suitably used.
  • the compressed air flows in the central portion of the nozzle and the liquid flows in the outer peripheral portion, whereby the compressed air and the liquid are mixed and mist is formed.
  • the internal mixed internal air type has the advantage that it is very resistant to clogging by liquid.
  • the liquid feed pump 3 feeds the ozone UFB-containing liquid 7 to the two-fluid nozzle 2 at a desired pressure in order to spray the ozone UFB-containing liquid 7 as a mist 8 from the two-fluid nozzle 2.
  • the liquid feed pump 3 can adjust the liquid pressure of the ozone UFB-containing liquid 7 sent to the two-fluid nozzle 2 by adjusting the rotation speed of the motor.
  • a pump with no pulsation that can be adjusted to a low flow rate at a high discharge pressure (for example, the maximum discharge pressure is about 0.5 MPa) can be used.
  • the pressure gauge 5 is provided between the liquid feed pump 3 and the two-fluid nozzle 2, and detects and monitors the pressure of the ozone UFB-containing liquid 7 sent to the two-fluid nozzle 2.
  • the liquid feed pump 3 sets the liquid pressure of the ozone UFB-containing liquid 7 to a desired magnitude based on the detection value of the pressure gauge 5.
  • the compressor 4 sends compressed air necessary for mist formation of the ozone UFB-containing liquid 7 with the two-fluid nozzle 2 to the two-fluid nozzle 2.
  • an oil-free compressor having a high output (for example, a maximum discharge pressure of about 0.8 MPa) can be suitably used.
  • the compressed air from the compressor 4 is cleaned through an air filter (not shown), and then set to a desired pressure by the pressure reducing valve 6 and sent to the two-fluid nozzle 2.
  • the mist 8 is sprayed from the two-fluid nozzle 2 so that the average diameter at the position of the object 9 is 10 ⁇ m or more and 1000 ⁇ m or less.
  • the mist 8 in a state in which the sterilizing power and / or the ozone concentration of the ozone UFB-containing liquid 7 is sufficiently maintained is sprayed on the object 9, a wide range of objects 8 can be removed with a small amount of the ozone UFB-containing liquid 7. It can be sterilized and deodorized.
  • the verification result of a mist average diameter, bactericidal power, and ozone concentration is mentioned later.
  • the correlation between the air pressure and the liquid pressure entering the two-fluid nozzle 2 and the average diameter of the mist 8 sprayed from the two-fluid nozzle 1 will also be described later.
  • FIG. 2 schematically shows how the ozone UFB-containing liquid 7 is misted by the sterilization / deodorization system 1.
  • the ozone UFB containing liquid 7 contains many UFB7u, as shown in FIG.
  • the mist 8 generated from the ozone UFB-containing liquid 7 by the sterilization / deodorization system 1 has an average diameter of 10 ⁇ m or more and 1000 ⁇ m or less.
  • the mist 8 also contains UFB8u.
  • a pressure adjustment valve may be provided between the two-fluid nozzle 2 and the liquid feed pump 3 instead of the pressure gauge 5, or a pressure adjustment valve may be provided in addition to the pressure gauge 5.
  • a pressure gauge 5 nor the pressure regulating valve may be provided.
  • a pressure gauge may be provided between the two-fluid nozzle 2 and the compressor 4 instead of the pressure reducing valve (pressure adjusting valve) 6, or a pressure gauge may be provided in addition to the pressure reducing valve 6.
  • the pressure reducing valve 6 and the pressure gauge need not be provided.
  • Table 1 shows the pH, UFB average diameter [nm], UFB standard deviation [nm], UFB density [units / ml], and ozone concentration [mg / L] for the ozone UFB-containing liquids of conditions (1) and (2). ]It is shown.
  • UFB average diameter is an arithmetic average value of the diameters of all particles (including UFB) present in the liquid.
  • UFB standard deviation is the standard deviation of the diameter of all particles (including UFB) present in the liquid.
  • UFB density is the number of particles (including UFB) present per 1 ml of liquid.
  • the UFB average diameter, UFB standard deviation, and UFB density were measured using a nanoparticle diameter / particle number measuring device “Nanosite LM10” manufactured by Nippon Quantum Design Co., Ltd.
  • the UFB average diameter, UFB standard deviation, and UFB density were measured at least three times to obtain the average value in order to reduce variation in measured values.
  • the ozone concentration was measured using a portable absorptiometer “DR850” manufactured by Toa DKK Corporation and an ozone reagent “HACH1186”.
  • the ozone concentration was also an average value of three measured values in order to reduce variation in the measured values.
  • the ozone UFB containing liquid of the condition (1) whose main component is water was prepared.
  • the pH is 7.7
  • the UFB average diameter is 119.9 nm
  • the UFB standard deviation is 39.7 nm
  • the UFB density is 9.29 ⁇ 10 8 pieces. / Ml
  • ozone concentration was 0.27 mg / L.
  • ozone UFB-containing liquids having different UFB average diameter, UFB standard deviation, and UFB density
  • an appropriate amount of citric acid is added to the ozone UFB-containing liquid of condition (1) to adjust the pH to 5.8.
  • the ozone UFB containing liquid of the conditions (2) was prepared. The reason for this adjustment is that the gas-liquid interface of UFB may be charged, and it is thought that the UFB average diameter, UFB standard deviation, and UFB density can be changed by adjusting the pH. .
  • the pH is 5.8, the UFB average diameter is 200.4 nm, the UFB standard deviation is 108.9 nm, and the UFB density is 5.51 ⁇ 10 7 pieces. / Ml, ozone concentration was 0.25 mg / L.
  • the ozone concentration did not decrease after being held at room temperature for 2 hours. Moreover, about the ozone UFB containing liquid of the conditions (1), when refrigerated storage was performed at 10 degrees C or less, the ozone concentration did not decrease even after two months. For reference, the ozone concentration of pure water was measured and found to be 0.00 mg / L. From these facts, it is understood that ozone gas is present in the liquid in the UFB state in any of the ozone UFB-containing liquids in the conditions (1) and (2).
  • the measurement of the mist average diameter was performed using a particle size distribution measuring device “Aerotrac LDSA-SPR3500A” manufactured by Microtrack Bell Co., Ltd.
  • This apparatus uses the Franchohel diffraction method as a measurement principle.
  • the “mist average diameter” means a Sauter average particle diameter that is generally used as an average value of the particle diameter of droplets.
  • the Sauter average particle diameter is a value represented as ⁇ n i x i 3 / ⁇ n i x i 2 where n i is the particle diameter and x i is the number of particles.
  • the measurement position of the mist average diameter is the position of the object 9 to which the mist 8 is sprayed. Here, since the position of the object 9 was 30 cm away from the tip of the two-fluid nozzle 2 along the spray direction of the mist 8, the mist average diameter at that position was measured.
  • the mist average diameter was made into the average value of 5 times of measured values.
  • the spray pattern by the two-fluid nozzle 2 is a full cone type.
  • the injection amount from the two-fluid nozzle 2 was about 0.2 to 15 L / h.
  • the mist average diameter can be controlled (specifically, 10 ⁇ m or more and 1000 ⁇ m or less) by appropriately setting the air pressure and the liquid pressure.
  • Table 3 shows the ozone concentration [mg / L] and ozone concentration reduction rate [%] when the mist average diameter is 7.2 ⁇ m, 7.4 ⁇ m, 7.5 ⁇ m, 10.0 ⁇ m, 12.1 ⁇ m, and 39.7 ⁇ m. ] And E. coli viability.
  • Table 3 also shows the ozone concentration and the E. coli survival rate of the ozone UFB-containing liquid before mist formation.
  • FIG. 3 is a graph in which the horizontal axis represents the mist average diameter [ ⁇ m], and the vertical axis represents the ozone concentration reduction rate [%] and the E. coli survival rate.
  • the mist 8 at the position of the object 9 (here, a position 30 cm away from the two-fluid nozzle 2 along the spray direction). Were collected, and the ozone concentration and the Escherichia coli survival rate of a sample having a predetermined liquid volume (specifically, about 50 ml) were measured. If the sterilizing power and the ozone concentration of the ozone UFB-containing liquid 7 are reduced by mist formation, the sterilizing power and the ozone concentration should naturally be reduced even in the sample obtained by collecting the mist.
  • the mist has at least the same level of bactericidal power and ozone concentration as the sample obtained by collecting the mist.
  • the ozone concentration was measured using a portable absorptiometer “DR850” manufactured by Toa DKK Corporation and an ozone reagent “HACH1186”.
  • the ozone concentration was an average value of three measurement values in order to reduce variation in the measurement values.
  • the ozone concentration reduction rate is a value calculated by calculating how much the ozone concentration after mist formation has decreased from the ozone concentration before mist formation when the ozone concentration of the ozone UFB-containing liquid before mist formation is 100%.
  • E. coli survival rate [100 ⁇ ⁇ (ozone concentration before mist) ⁇ (ozone concentration after mist) ⁇ / (ozone concentration before mist)].
  • Petrifilm (registered trademark) medium CC plate for measuring E. coli group count” manufactured by 3M Healthcare Co., Ltd. was used. Specifically, the measurement of the survival rate of E. coli was performed as follows. First, a moderately diluted Escherichia coli solution and pure water were mixed at a ratio of 1: 9, and after 1 minute, an appropriate amount of the mixture was dropped onto a Petri film, and the number of bacteria counted after incubation at 35 ° C.
  • the Escherichia coli solution and the pre-misted or post-misted ozone UFB-containing solution were mixed at 1: 9, and after 1 minute, an appropriate amount of the mixed solution was dropped on a Petri film, and the bacteria counted after incubation at 35 ° C. for 24 hours. The percentage of numbers was calculated. That is, the Escherichia coli survival rate is a value indicating the bactericidal power of the ozone UFB-containing liquid before or after mist formation.
  • the ozone UFB-containing liquid before mist formation has a very small E. coli survival rate of less than 1.0 ⁇ 10 ⁇ 4, and the ozone UFB-containing liquid before mist formation has a high bactericidal power. Recognize. Further, from Table 3 and FIG. 3, when the average diameter of the mist is 10 ⁇ m or more, the viability of E. coli is less than 1.0 ⁇ 10 ⁇ 4 even before the mist formation even after the mist formation. It can be seen that the same sterilizing power is maintained after mist formation. On the other hand, when the average diameter of the mist is 10 ⁇ m or less, the survival rate of E. coli is 1.0 ⁇ 10 ⁇ 3 or more. That is, after the mist formation, the survival rate of Escherichia coli is larger by one digit or more than before the mist formation, and the sterilization power decreases after the mist formation, and the sterilization power before the mist formation is not maintained.
  • the E. coli survival rate depends on the ozone concentration reduction rate, and as the ozone concentration reduction rate increases, the E. coli survival rate also increases and the bactericidal power decreases.
  • the threshold value is 25%. That is, when the ozone concentration reduction rate is 25% or less, as shown in Table 3 and FIG. 3, it can be seen that the sterilizing power of the ozone UFB-containing liquid before mist formation is sufficiently maintained. Therefore, it can be said that the ozone concentration is sufficiently maintained when the ozone concentration reduction rate is 25% or less.
  • the ozone UFB-containing liquid of the condition (2) was also verified as to whether or not the ozone concentration of the original ozone UFB-containing liquid is maintained after mist formation.
  • the results of verification are shown in Table 4 and FIG.
  • Table 4 shows the ozone concentration [mg / L] when the mist average diameter is 7.4 ⁇ m, 7.5 ⁇ m, 10.0 ⁇ m, 12.1 ⁇ m, and 39.7 ⁇ m for the ozone UFB-containing liquid of condition (2). And ozone concentration reduction rate [%]. Table 4 also shows the ozone concentration and the ozone concentration reduction rate for the ozone UFB-containing liquid of condition (1).
  • FIG. 4 is a graph in which the horizontal axis represents the mist average diameter [ ⁇ m] and the vertical axis represents the ozone concentration reduction rate [%].
  • the ozone UFB-containing liquid of condition (2) also has a sufficient ozone concentration before mist formation because the mist average diameter is 10 ⁇ m or more, similarly to the ozone UFB-containing liquid of condition (1).
  • the characteristic values (UFB average diameter, UFB standard deviation, and UFB density) of the ozone UFB-containing liquid are greatly different between the condition (1) and the condition (2).
  • the ozone concentration before mist formation was sufficiently maintained by setting the mist average diameter to 10 ⁇ m or more.
  • the ozone concentration before mist formation can be sufficiently maintained, that is, the bactericidal power can be sufficiently maintained.
  • mist average diameter From the standpoint of maintaining sterilizing power and ozone concentration, there is no limit on the upper limit of the mist average diameter, but if the mist average diameter is too large, the amount of ozone UFB-containing liquid required for sterilization / deodorization may increase. .
  • mist average diameter is 1000 ⁇ m or less, an effect is obtained that a relatively wide range can be sterilized and deodorized with a small amount of ozone UFB-containing liquid.
  • One of the two verified methods is the pressure injection valve method.
  • a liquid feed pump is connected to one fluid nozzle, and mist formation is performed using the pressure of the liquid.
  • the other method is a method using a handy type spray bottle (having a nozzle structure at the tip of the bottle, and the liquid is sprayed as a mist from the nozzle).
  • the position of the object is 30 cm away from the nozzle tip
  • the object position is 5 cm away from the nozzle tip.
  • the mist average diameter at the position of the object is 10 ⁇ m or more and 1000 ⁇ m or less.
  • an ozone UFB-containing liquid having an ozone concentration of 0.24 mg / L was misted, and the mist at the position of the object was collected and measured.
  • the ozone concentration after mist formation was 0.20 mg / L, and the ozone concentration reduction rate was 16.7%.
  • the sterilization power of the original ozone UFB-containing liquid is sufficiently increased by setting the mist average diameter to 10 ⁇ m or more. Can be maintained.
  • ozone concentration is reduced by using a pressure injection valve type sterilization / deodorization system for ozone water that is dissolved in pure water by generating ozone gas in pure water. The rate was verified.
  • the ozone concentration after mist formation is 0.14 mg / L, even though the mist average diameter at the position of the object is 10 ⁇ m or more and 1000 ⁇ m or less.
  • the ozone concentration reduction rate was 70.8%.
  • the sterilization / deodorization method in the present embodiment sterilizes an object by spraying a liquid containing ultrafine bubbles (UFB) containing ozone gas as a mist having a mist average diameter of 10 ⁇ m or more and 1000 ⁇ m or less. ⁇
  • UFB ultrafine bubbles
  • the sterilization / deodorization method (mist generation method) of the present embodiment When the sterilization / deodorization method (mist generation method) of the present embodiment is used, a mist in a state where the sterilization power and / or ozone concentration of the ozone UFB-containing liquid is sufficiently maintained is sprayed on the object.
  • a mist in a state where the sterilization power and / or ozone concentration of the ozone UFB-containing liquid is sufficiently maintained is sprayed on the object.
  • a wide range of objects can be sterilized and deodorized with an ozone UFB-containing liquid.
  • the sterilization / deodorization system used in the sterilization / deodorization method of the present embodiment includes three exemplified sterilization / deodorization systems (sterilization / deodorization system including a two-fluid nozzle 2 as shown in FIG. 1, pressure injection It is not limited to a valve-type sterilization / deodorization system or a sterilization / deodorization system using a handy type spray bottle. Any sterilization / deodorization system capable of spraying an ozone UFB-containing liquid as a mist having a mist average diameter of 10 ⁇ m or more and 1000 ⁇ m or less can be suitably used for the sterilization / deodorization method of the present embodiment.
  • FIG. 5 is a diagram schematically showing the mist generating device 10.
  • generation apparatus 10 is provided with the storage part 11 and the mist production
  • the storage unit 11 stores a liquid (ozone UFB-containing liquid) containing UFB (bubbles having a diameter of 1 ⁇ m or less) containing ozone gas.
  • the storage unit 11 stores an ozone UFB-containing liquid before using the mist generating device 10.
  • the storage unit 11 preferably has a sealed structure so that air does not touch the ozone UFB-containing liquid. Thereby, it is possible to prevent the ozone from being removed from the ozone UFB-containing liquid, and to further increase the ozone holding power of the ozone UFB-containing liquid.
  • the storage unit 11 includes a cold insulating unit that can maintain the temperature of the ozone UFB-containing liquid at a predetermined temperature or lower (for example, 10 ° C. or lower). Thereby, it is possible to prevent the ozone from being removed from the ozone UFB-containing liquid, and to further increase the ozone holding power of the ozone UFB-containing liquid.
  • a predetermined temperature or lower for example, 10 ° C. or lower
  • the storage unit 11 is preferably formed of a material having ozone resistance. Specifically, glass or stainless steel (a strong non-moving film made of chromium is formed on the surface, so that the oxidation by ozone is extremely advanced. It is preferably made of a fluororesin (PFA, PTFE, etc.). Thereby, since degradation of the storage unit 11 due to ozone can be prevented, the life of the mist generating device 10 can be extended.
  • PFA fluororesin
  • the mist generating unit 12 sprays the ozone UFB-containing liquid stored in the storage unit 11 as a mist 8 on the object. More specifically, the mist production
  • the generation method of the mist 8 by the mist generation unit 12 is not particularly limited.
  • a two-fluid nozzle as described in Embodiment 1 can be used.
  • the mist generation unit 12 includes, for example, a liquid feed pump, a compressor, a two-fluid nozzle, and the like, but is not limited to this configuration.
  • the use of a two-fluid nozzle has advantages such as excellent mist refinement performance, easy control of the mist average diameter, large adjustment range of the spray flow rate, and passage of relatively large foreign matter. can get.
  • a one-fluid nozzle of the pressure injection valve type as described in the first embodiment may be used.
  • generation part 12 is comprised from a liquid feeding pump, a 1 fluid nozzle, etc.
  • a single fluid nozzle is used, there are advantages such that the number of components can be reduced (no compressor is required), the cost performance is excellent, and the spray flow rate can be adjusted.
  • the nozzle configuration used in the handy type spray bottle as described in the first embodiment may be used.
  • the number of components can be greatly reduced (no compressor or liquid feed pump is required), the cost performance is excellent, and the entire apparatus can be reduced in weight.
  • the ozone UFB-containing liquid can be sprayed as a mist 8 having an average mist diameter of 10 ⁇ m or more and 1000 ⁇ m or less
  • a vaporization method, a steam method, an ultra mist generation method generally used in humidifiers can be used.
  • a sound wave method or the like may be used.
  • the constituent elements of the mist generating unit 12 are also formed of a material having ozone resistance. Specifically, glass or stainless steel (a strong non-moving film made of chromium is formed on the surface, so oxidation by ozone Is preferably made of a fluororesin (PFA, PTFE, etc.). Thereby, since deterioration of the mist production
  • a material having ozone resistance Specifically, glass or stainless steel (a strong non-moving film made of chromium is formed on the surface, so oxidation by ozone Is preferably made of a fluororesin (PFA, PTFE, etc.).
  • the mist generating apparatus 10 in the present embodiment includes the storage unit 11 that stores the ozone UFB-containing liquid, and the mist generating unit 12 that sprays the ozone UFB-containing liquid as the mist 8 having a mist average diameter of 10 ⁇ m to 1000 ⁇ m. With. Therefore, it becomes possible to spray the mist 8 in a state in which the sterilizing power and / or ozone concentration of the ozone UFB-containing liquid is sufficiently maintained, and sterilize and deodorize a wide range of objects with a small amount of the ozone UFB-containing liquid. It becomes possible to do. Moreover, since the mist production
  • FIG. 6 is a diagram schematically showing the mist generating device 20.
  • generation apparatus 20 demonstrates centering around a different point from the mist production
  • FIG. 6 is a diagram schematically showing the mist generating device 20.
  • the mist generator 20 includes an ozone gas generator 23, an ozone UFB-containing liquid generator 24, and a mist generator 22. That is, the mist generating device 20 is different from the mist generating device 10 of the second embodiment in that the ozone mist generating device 23 and the ozone UFB-containing liquid generating unit 24 are provided. Moreover, the mist production
  • the ozone gas generator 23 generates ozone gas.
  • the generation method of the ozone gas is not particularly limited, and various methods can be used.
  • a discharge method such as a silent discharge method or a corona discharge method, an electrolysis method, an ultraviolet lamp method, or the like can be used.
  • the discharge method has the advantage that the production cost is very low.
  • the electrolytic process has the advantage that no harmful nitrogen oxides (NOx) are produced as a secondary.
  • the ultraviolet lamp method has an advantage that ozone gas can be easily generated.
  • the ozone UFB-containing liquid generating unit 24 uses the ozone gas generated by the ozone gas generating unit 23, that is, generates an ozone UFB-containing liquid containing UFB containing the ozone gas generated by the ozone gas generating unit 23.
  • the generation method of the ozone UFB-containing liquid is not particularly limited, and various methods can be used. For example, swirling flow method, static mixer method, ejector method, venturi method, pressure dissolution method, cavitation method, ultrafine pore method, rotation method, ultrasonic method, vibrating perforated plate method, electrolysis method, and a combination of these methods Etc. can be used.
  • the swirl flow system has the advantage that the device configuration can be made relatively simple.
  • generation part 22 sprays the ozone UFB containing liquid produced
  • various methods can be used as in the mist generation unit 12 of the mist generation device 10 of the second embodiment.
  • the mist generating device 20 in the present embodiment includes the ozone gas generating unit 23 that generates ozone gas, and the bubble-containing liquid that generates an ozone UFB-containing liquid that contains UFB containing the ozone gas generated by the ozone gas generating unit 23.
  • generation part 22 which sprays the ozone UFB containing liquid produced
  • generation apparatus 20 in this embodiment has the ozone UFB containing liquid production
  • generation apparatus 20 may further be provided with the storage part 21 which stores the ozone UFB containing liquid produced
  • FIG. 7 when the mist production
  • FIG. 6 when the mist production
  • the main component of the ozone UFB-containing liquid containing UFB containing ozone gas is water, but the embodiments of the present invention are not limited to this.
  • the main component of the liquid containing UFB containing ozone gas may be, for example, an organic solvent or various oils.
  • a mist generating apparatus and a mist generating method capable of spraying a mist having a sufficient sterilizing power and / or ozone concentration onto an object.
  • the mist generating device is suitably used as a sterilizing / deodorizing device. Moreover, the mist production

Abstract

A mist-generating device (10) is provided with: a storage unit (11) for storing an ozone UFB-containing liquid, which is a liquid comprising ozone gas-containing ultrafine bubbles; and a mist-generating unit (12) for forming a mist with an average mist diameter of 10 µm-1000 µm from the ozone UFB-containing liquid stored in the storage unit and spraying same.

Description

ミスト生成装置、ミスト生成方法および殺菌・脱臭方法Mist generating device, mist generating method and sterilizing / deodorizing method
　本発明の実施形態は、ミスト生成装置に関する。また、本発明の実施形態は、ミスト生成方法および殺菌・脱臭方法にも関する。 Embodiment of this invention is related with a mist production | generation apparatus. Embodiments of the present invention also relate to a mist generation method and a sterilization / deodorization method.
　近年、飲食店の厨房や食品工場だけでなく、家庭内においても対象物の殺菌・脱臭を好適に行うことができる方法が要望されている。そのような殺菌・脱臭方法の確立のため、殺菌・脱臭能力の高いオゾンを使用することが試みられてきた。 In recent years, there is a demand for a method capable of suitably sterilizing and deodorizing an object not only in a restaurant kitchen or food factory, but also in the home. In order to establish such a sterilization / deodorization method, it has been attempted to use ozone having a high sterilization / deodorization ability.
　しかしながら、オゾンガスは気体であるので、開放環境下では利用できない。また、オゾンガスは、呼吸により人体の肺胞に取り込まれ、人体に悪影響を及ぼすおそれがある。 However, ozone gas is a gas and cannot be used in an open environment. In addition, ozone gas is taken into the alveoli of the human body by breathing and may adversely affect the human body.
　そこで、オゾンを溶解させた水（「オゾン水」と呼ばれる）を、対象物にミストとして噴霧する方法が提案されている。しかしながら、オゾン水を用いる方法については、オゾンが水に対して難溶性であるという問題に加えて、オゾン水のオゾン保有力が非常に弱いので、噴霧の際に十分な殺菌力およびオゾン濃度を維持することが困難であるという問題がある。 Therefore, a method of spraying water in which ozone is dissolved (referred to as “ozone water”) as a mist on an object has been proposed. However, for the method using ozone water, in addition to the problem that ozone is sparingly soluble in water, the ozone holding power of ozone water is very weak, so that sufficient sterilizing power and ozone concentration can be obtained during spraying. There is a problem that it is difficult to maintain.
　特許文献１は、オゾンを微細な気泡の状態で含むことによってオゾン保有力が向上したオゾン水を開示している。特許文献１には、１ヶ月以上にわたって十分なオゾン濃度が維持されると記載されている。 Patent Document 1 discloses ozone water whose ozone holding power is improved by containing ozone in the form of fine bubbles. Patent Document 1 describes that a sufficient ozone concentration is maintained for one month or longer.
特許第４０５９５０６号公報Japanese Patent No. 4059506
　直径が約１０μｍ～６０μｍの気泡は、「マイクロバブル」と呼ばれ、直径が１μｍ以下の気泡は、「ウルトラファインバブル（ＵＦＢ）」と呼ばれる。以下では、直径が１μｍ以下の気泡を「ＵＦＢ」と呼び、ＵＦＢを含有する液体を「ＵＦＢ含有液」と呼び、オゾンガスを含むＵＦＢを含有する液体を「オゾンＵＦＢ含有液」と呼ぶ。特許文献１の技術では、マイクロバブルに物理的刺激を加えてＵＦＢを生成することによって、オゾンＵＦＢ含有液を得ていると言える。 Bubbles with a diameter of about 10 μm to 60 μm are called “micro bubbles”, and bubbles with a diameter of 1 μm or less are called “ultra fine bubbles (UFB)”. In the following, bubbles having a diameter of 1 μm or less are referred to as “UFB”, a liquid containing UFB is referred to as “UFB-containing liquid”, and a liquid containing UFB containing ozone gas is referred to as “ozone UFB-containing liquid”. In the technique of Patent Document 1, it can be said that an ozone UFB-containing liquid is obtained by applying a physical stimulus to microbubbles to generate UFB.
　本願発明者は、オゾンＵＦＢ含有液を対象物にミストとして噴霧して殺菌・脱臭を行う方法について、種々の検討を行った。その結果、単にオゾンＵＦＢ含有液を用いるだけでは、対象物に噴霧されるミストが十分な殺菌力およびオゾン濃度を有しない（元のオゾンＵＦＢ含有液の殺菌力およびオゾン濃度が十分に維持されない）おそれがあることがわかった。 The inventor of the present application has made various studies on a method for sterilization and deodorization by spraying an ozone UFB-containing liquid as a mist on an object. As a result, the mist sprayed on the object does not have sufficient sterilizing power and ozone concentration by simply using the ozone UFB-containing liquid (the sterilizing power and ozone concentration of the original ozone UFB-containing liquid are not sufficiently maintained). I found out there was a fear.
　本発明の実施形態は、上記問題に鑑みてなされたものであり、その目的は、十分な殺菌力および／またはオゾン濃度を有するミストを対象物に噴霧することができるミスト生成装置およびミスト生成方法を提供することにある。 Embodiments of the present invention have been made in view of the above problems, and the object thereof is a mist generating apparatus and a mist generating method capable of spraying a mist having sufficient sterilizing power and / or ozone concentration onto an object. Is to provide.
　本発明の実施形態によるミスト生成装置は、オゾンガスを含むウルトラファインバブルを含有する液体であるオゾンＵＦＢ含有液を貯蔵する貯蔵部と、前記貯蔵部に貯蔵されている前記オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧するミスト生成部とを備える。 A mist generating apparatus according to an embodiment of the present invention includes a storage unit that stores an ozone UFB-containing liquid that is a liquid containing an ultrafine bubble containing ozone gas, and a mist that contains the ozone UFB-containing liquid stored in the storage unit. A mist generating unit that sprays as a mist having an average diameter of 10 μm to 1000 μm.
　本発明の実施形態による他のミスト生成装置は、オゾンガスを生成するオゾンガス生成部と、前記オゾンガス生成部によって生成された前記オゾンガスを含むウルトラファインバブルを含有する液体であるオゾンＵＦＢ含有液を生成するオゾンＵＦＢ含有液生成部と、前記オゾンＵＦＢ含有液生成部によって生成された前記オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧するミスト生成部とを備える。 Another mist generating apparatus according to an embodiment of the present invention generates an ozone UFB-containing liquid that is a liquid containing an ozone gas generating unit that generates ozone gas and an ultrafine bubble that includes the ozone gas generated by the ozone gas generating unit. An ozone UFB-containing liquid generating unit; and a mist generating unit that sprays the ozone UFB-containing liquid generated by the ozone UFB-containing liquid generating unit as a mist having a mist average diameter of 10 μm to 1000 μm.
　ある実施形態において、前記ミスト生成装置は、前記オゾンＵＦＢ含有液生成部によって生成された前記オゾンＵＦＢ含有液を貯蔵する貯蔵部をさらに備える。 In one embodiment, the mist generating device further includes a storage unit that stores the ozone UFB-containing liquid generated by the ozone UFB-containing liquid generating unit.
　本発明の実施形態によるミスト生成方法は、液体からミストを生成するミスト生成方法であって、オゾンガスを含むウルトラファインバブルを含有する液体であるオゾンＵＦＢ含有液を用意するステップ（Ａ）と、前記オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧するステップ（Ｂ）とを包含する。 A mist generation method according to an embodiment of the present invention is a mist generation method for generating mist from a liquid, the step (A) of preparing an ozone UFB-containing liquid that is a liquid containing ultrafine bubbles including ozone gas, and Spraying the ozone UFB-containing liquid as a mist having a mist average diameter of 10 μm or more and 1000 μm or less.
　ある実施形態において、前記ステップ（Ａ）は、前記オゾンガスを生成するステップ（Ａ－１）と、前記ステップ（Ａ－１）において生成された前記オゾンガスを用いて前記オゾンＵＦＢ含有液を生成するステップ（Ａ－２）とを含む。 In one embodiment, the step (A) includes the step (A-1) of generating the ozone gas, and the step of generating the ozone UFB-containing liquid using the ozone gas generated in the step (A-1). (A-2).
　本発明の実施形態による殺菌・脱臭方法は、前記ミスト生成方法を用いて対象物に前記ミストを噴霧することによって、前記対象物の殺菌および／または脱臭を行う。 In the sterilization / deodorization method according to the embodiment of the present invention, the object is sterilized and / or deodorized by spraying the mist on the object using the mist generation method.
　本発明の実施形態によると、十分な殺菌力および／またはオゾン濃度を有するミストを対象物に噴霧することができるミスト生成装置およびミスト生成方法が提供される。 According to the embodiment of the present invention, a mist generating apparatus and a mist generating method capable of spraying a mist having a sufficient sterilizing power and / or ozone concentration onto an object are provided.
本発明の実施形態による殺菌・脱臭システム１を模式的に示す図である。1 is a diagram schematically showing a sterilization / deodorization system 1 according to an embodiment of the present invention. オゾンＵＦＢ含有液７が殺菌・脱臭システム１によってミスト化される様子を模式的に示す図である。It is a figure which shows typically a mode that the ozone UFB containing liquid 7 is mist-ized by the sterilization and deodorizing system 1. FIG. ミスト平均径［μｍ］と、オゾン濃度減少率［％］および大腸菌生存率との関係を示すグラフである。It is a graph which shows the relationship between mist average diameter [micrometer], ozone concentration decreasing rate [%], and Escherichia coli survival rate. ミスト平均径［μｍ］と、オゾン濃度減少率［％］との関係を示すグラフである。It is a graph which shows the relationship between mist average diameter [micrometer] and ozone concentration decreasing rate [%]. 本発明の実施形態によるミスト生成装置１０を模式的に示す図である。It is a figure showing typically mist generating device 10 by an embodiment of the present invention. 本発明の実施形態によるミスト生成装置２０を模式的に示す図である。It is a figure showing typically mist generating device 20 by an embodiment of the present invention. 本発明の実施形態によるミスト生成装置２０を模式的に示す図である。It is a figure showing typically mist generating device 20 by an embodiment of the present invention.
　本願発明者は、オゾンＵＦＢ含有液を対象物にミストとして噴霧する殺菌・脱臭方法を、種々の条件で行い、ミストの殺菌力やオゾン濃度について詳細な検討を行った。その結果、ミストのサイズ（ミスト平均径）を所定の範囲内に設定することにより、ミストが十分な殺菌力およびオゾン濃度を有する（元のオゾンＵＦＢ含有液の殺菌力およびオゾン濃度が十分に維持される）ことを見出した。本発明は、本願発明者が見出したこの知見に基づいてなされたものである。 The inventor of the present application conducted a sterilization / deodorization method for spraying an ozone UFB-containing liquid as a mist on an object under various conditions, and performed detailed studies on the sterilization power and ozone concentration of the mist. As a result, by setting the mist size (mist average diameter) within a predetermined range, the mist has sufficient sterilizing power and ozone concentration (the sterilizing power and ozone concentration of the original ozone UFB-containing liquid are sufficiently maintained. Found that). This invention is made | formed based on this knowledge which this inventor discovered.
　以下、図面を参照しながら本発明の実施形態を説明する。なお、本発明は以下の実施形態に限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.
　（実施形態１）
　［ミスト生成方法、殺菌・脱臭方法］
　以下、本実施形態におけるミスト生成方法および殺菌・脱臭方法を説明する。 (Embodiment 1)
[Mist generation method, sterilization / deodorization method]
Hereinafter, the mist generation method and the sterilization / deodorization method in this embodiment will be described.
　本実施形態におけるミスト生成方法は、オゾンガスを含むＵＦＢを含有する液体であるオゾンＵＦＢ含有液を用意するステップ（Ａ）と、そのオゾンＵＦＢ含有液を対象物にミストとして噴霧するステップ（Ｂ）とを包含する。 The mist generation method in this embodiment includes a step (A) of preparing an ozone UFB-containing liquid that is a liquid containing UFB containing ozone gas, and a step (B) of spraying the ozone UFB-containing liquid as a mist on an object. Is included.
　ステップ（Ａ）において用意されるオゾンＵＦＢ含有液に含まれる気泡は、１μｍ以下の直径を有する気泡、つまり、ＵＦＢを含有している。本願明細書において、「ＵＦＢ含有液」は、含有する粒子（気泡を含む）の直径の算術平均値が１μｍ以下である液体を意味している。 The bubbles contained in the ozone UFB-containing liquid prepared in step (A) contain bubbles having a diameter of 1 μm or less, that is, UFB. In the present specification, “UFB-containing liquid” means a liquid having an arithmetic average value of the diameter of contained particles (including bubbles) of 1 μm or less.
　ステップ（Ｂ）において噴霧されるミストは、平均径が特定の範囲内に設定されている。具体的には、ミスト平均径（定義については後に詳細を説明する）は、１０μｍ以上１０００μｍ以下である。ここで、「ミスト平均径」は、噴霧口の位置での値ではなく、対象物の位置での値を意味している。 The average diameter of the mist sprayed in step (B) is set within a specific range. Specifically, the mist average diameter (details will be described later for the definition) is not less than 10 μm and not more than 1000 μm. Here, the “mist average diameter” means not a value at the position of the spray port but a value at the position of the object.
　このように、本実施形態のミスト生成方法では、オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして対象物に噴霧する。これにより、後に詳述するように、ミストの殺菌力およびオゾン濃度を十分に高くする（元のオゾンＵＦＢ含有液の殺菌力およびオゾン濃度を十分に維持する）ことができる。 Thus, in the mist generating method of the present embodiment, the ozone UFB-containing liquid is sprayed on the object as a mist having a mist average diameter of 10 μm or more and 1000 μm or less. Thereby, as will be described in detail later, the sterilizing power and ozone concentration of the mist can be sufficiently increased (the sterilizing power and ozone concentration of the original ozone UFB-containing liquid can be sufficiently maintained).
　なお、ステップ（Ａ）において、オゾンＵＦＢ含有液が作製されてもよい。つまり、ステップ（Ａ）は、例えば、オゾンガスを生成するステップ（Ａ－１）と、ステップ（Ａ－１）において生成されたオゾンガスを用いてオゾンＵＦＢ含有液を生成するステップ（Ａ－２）とを含んでもよい。あるいは、ステップ（Ａ）において、作製済みのオゾンＵＦＢ含有液が入手されてもよい。 In step (A), an ozone UFB-containing liquid may be prepared. That is, step (A) includes, for example, a step (A-1) for generating ozone gas, and a step (A-2) for generating an ozone UFB-containing liquid using the ozone gas generated in step (A-1). May be included. Alternatively, a prepared ozone UFB-containing liquid may be obtained in step (A).
　本実施形態におけるミスト生成方法は、殺菌・脱臭方法に好適に用いられる。本実施形態のミスト生成方法を用いて対象物にミストを噴霧することによって、対象物の殺菌および／または脱臭を行うことができる。 The mist generating method in this embodiment is preferably used for a sterilization / deodorization method. By spraying the mist onto the object using the mist generating method of the present embodiment, the object can be sterilized and / or deodorized.
　［殺菌・脱臭システム］
　図１を参照しながら、本実施形態の殺菌・脱臭方法に用いられる殺菌・脱臭システムの例を説明する。図１は、殺菌・脱臭システム１を模式的に示す図である。 [Sterilization / deodorization system]
An example of a sterilization / deodorization system used in the sterilization / deodorization method of this embodiment will be described with reference to FIG. FIG. 1 is a diagram schematically showing a sterilization / deodorization system 1.
　殺菌・脱臭システム１は、図１に示すように、二流体ノズル２、送液ポンプ３、コンプレッサー４、圧力計５および減圧弁（圧力調整弁）６から構成されている。殺菌・脱臭システム１は、オゾンＵＦＢ含有液７を、二流体ノズル２からミスト８として対象物９に噴霧する。対象物９は、例えば、飲食店の器具、家庭内の種々の物品、人体の一部（例えば手）などである。 The sterilization / deodorization system 1 includes a two-fluid nozzle 2, a liquid feed pump 3, a compressor 4, a pressure gauge 5, and a pressure reducing valve (pressure adjusting valve) 6, as shown in FIG. The sterilization / deodorization system 1 sprays the ozone UFB-containing liquid 7 on the object 9 as a mist 8 from the two-fluid nozzle 2. The object 9 is, for example, a restaurant appliance, various articles in the home, a part of the human body (for example, a hand), or the like.
　オゾンＵＦＢ含有液７中には、オゾンガスを含む直径１μｍ以下の気泡（ＵＦＢ）が多く存在する。液体中の気泡の直径が約１０μｍ～６０μｍの場合（つまりマイクロバブルの場合）、そのような気泡（マイクロバブル）は液体中をゆっくり上昇し、収縮して消滅してしまう。これに対し、オゾンＵＦＢ含有液７では、オゾンガスを含む気泡の多くが、直径１μｍ以下の気泡（ＵＦＢ）であり、液体中で非常に安定に存在する。 In the ozone UFB-containing liquid 7, there are many bubbles (UFB) having a diameter of 1 μm or less containing ozone gas. When the diameter of bubbles in the liquid is about 10 μm to 60 μm (that is, in the case of microbubbles), such bubbles (microbubbles) slowly rise in the liquid and contract and disappear. On the other hand, in the ozone UFB-containing liquid 7, most of the bubbles containing ozone gas are bubbles (UFB) having a diameter of 1 μm or less, and exist very stably in the liquid.
　二流体ノズル２は、２系統に分けられた圧搾空気と液体とを混合して噴出する方式のスプレーノズルである。二流体ノズル２は、空気圧力と液圧力とを制御することにより、ミスト８の平均径を制御することができる。二流体ノズル２は、圧搾空気の高速気流によって液体を粉砕してミスト化するので、ミスト８の微細化に適している。気液混合方式としては、内部混合内気形方式を好適に用いることができる。内部混合内気形方式では、ノズル内部においてその中心部に圧搾空気が流れるとともに外周部に液体が流れることによって、圧搾空気と液体とが混ざり合い、ミスト化が行われる。内部混合内気形方式は、液体による目詰まりに非常に強いという利点を有する。 The two-fluid nozzle 2 is a spray nozzle that mixes and blows out compressed air and liquid divided into two systems. The two-fluid nozzle 2 can control the average diameter of the mist 8 by controlling the air pressure and the liquid pressure. The two-fluid nozzle 2 is suitable for miniaturization of the mist 8 because the liquid is pulverized and misted by a high-speed airflow of compressed air. As the gas-liquid mixing method, an internal mixed internal gas type method can be suitably used. In the internal mixed internal air type, the compressed air flows in the central portion of the nozzle and the liquid flows in the outer peripheral portion, whereby the compressed air and the liquid are mixed and mist is formed. The internal mixed internal air type has the advantage that it is very resistant to clogging by liquid.
　送液ポンプ３は、オゾンＵＦＢ含有液７を二流体ノズル２からミスト８として噴霧するために、オゾンＵＦＢ含有液７を所望の圧力で二流体ノズル２に送液する。送液ポンプ３は、モーターの回転速度を調節することによって、二流体ノズル２に送るオゾンＵＦＢ含有液７の液圧力を調節することができる。送液ポンプ３としては、高吐出圧（例えば最高吐出圧が０．５ＭＰａ程度）で低流量への調整が可能で、脈動のないポンプを好適に用いることができる。 The liquid feed pump 3 feeds the ozone UFB-containing liquid 7 to the two-fluid nozzle 2 at a desired pressure in order to spray the ozone UFB-containing liquid 7 as a mist 8 from the two-fluid nozzle 2. The liquid feed pump 3 can adjust the liquid pressure of the ozone UFB-containing liquid 7 sent to the two-fluid nozzle 2 by adjusting the rotation speed of the motor. As the liquid feed pump 3, a pump with no pulsation that can be adjusted to a low flow rate at a high discharge pressure (for example, the maximum discharge pressure is about 0.5 MPa) can be used.
　圧力計５は、送液ポンプ３と二流体ノズル２との間に設けられており、二流体ノズル２に送られるオゾンＵＦＢ含有液７の圧力を検出・モニターする。送液ポンプ３は、圧力計５の検出値に基づいて、オゾンＵＦＢ含有液７の液圧力を所望の大きさに設定する。 The pressure gauge 5 is provided between the liquid feed pump 3 and the two-fluid nozzle 2, and detects and monitors the pressure of the ozone UFB-containing liquid 7 sent to the two-fluid nozzle 2. The liquid feed pump 3 sets the liquid pressure of the ozone UFB-containing liquid 7 to a desired magnitude based on the detection value of the pressure gauge 5.
　コンプレッサー４は、二流体ノズル２でオゾンＵＦＢ含有液７をミスト化するために必要な圧搾空気を二流体ノズル２に送る。コンプレッサー４としては、高出力（例えば最高吐出圧が０．８ＭＰａ程度）でオイルフリーなコンプレッサーを好適に用いることができる。コンプレッサー４から出た圧搾空気は、図示しないエアフィルターを通って清浄化され、その後、減圧弁６で所望の圧力に設定されて二流体ノズル２に送られる。 The compressor 4 sends compressed air necessary for mist formation of the ozone UFB-containing liquid 7 with the two-fluid nozzle 2 to the two-fluid nozzle 2. As the compressor 4, an oil-free compressor having a high output (for example, a maximum discharge pressure of about 0.8 MPa) can be suitably used. The compressed air from the compressor 4 is cleaned through an air filter (not shown), and then set to a desired pressure by the pressure reducing valve 6 and sent to the two-fluid nozzle 2.
　ミスト８は、対象物９の位置での平均径が１０μｍ以上１０００μｍ以下となるように、二流体ノズル２から噴霧される。これにより、オゾンＵＦＢ含有液７の殺菌力および／またはオゾン濃度が十分に維持された状態のミスト８が対象物９に噴霧されるので、少量のオゾンＵＦＢ含有液７で広範囲の対象物８を殺菌・脱臭することができる。なお、ミスト平均径と殺菌力およびオゾン濃度との検証結果は後述する。また、二流体ノズル２に入る空気の圧力および液体の圧力と、二流体ノズル１から噴霧されるミスト８の平均径との相関についても、後述する。 The mist 8 is sprayed from the two-fluid nozzle 2 so that the average diameter at the position of the object 9 is 10 μm or more and 1000 μm or less. Thereby, since the mist 8 in a state in which the sterilizing power and / or the ozone concentration of the ozone UFB-containing liquid 7 is sufficiently maintained is sprayed on the object 9, a wide range of objects 8 can be removed with a small amount of the ozone UFB-containing liquid 7. It can be sterilized and deodorized. In addition, the verification result of a mist average diameter, bactericidal power, and ozone concentration is mentioned later. The correlation between the air pressure and the liquid pressure entering the two-fluid nozzle 2 and the average diameter of the mist 8 sprayed from the two-fluid nozzle 1 will also be described later.
　図２に、オゾンＵＦＢ含有液７が殺菌・脱臭システム１によってミスト化される様子を模式的に示す。オゾンＵＦＢ含有液７は、図２に示すように、多くのＵＦＢ７ｕを含有している。殺菌・脱臭システム１によってオゾンＵＦＢ含有液７から生成されたミスト８は、１０μｍ以上１０００μｍ以下の平均径を有する。ミスト８も、ＵＦＢ８ｕを含有している。 FIG. 2 schematically shows how the ozone UFB-containing liquid 7 is misted by the sterilization / deodorization system 1. The ozone UFB containing liquid 7 contains many UFB7u, as shown in FIG. The mist 8 generated from the ozone UFB-containing liquid 7 by the sterilization / deodorization system 1 has an average diameter of 10 μm or more and 1000 μm or less. The mist 8 also contains UFB8u.
　なお、殺菌・脱臭システム１の構成は、図１に例示したものに限定されない。例えば、二流体ノズル２と送液ポンプ３との間に、圧力計５に代えて圧力調整弁が設けられてもよいし、圧力計５に加えて圧力調整弁が設けられてもよいし、圧力計５も圧力調整弁も設けられていなくてもよい。また、二流体ノズル２とコンプレッサー４との間に、減圧弁（圧力調整弁）６に代えて圧力計が設けられてもよいし、減圧弁６に加えて圧力計が設けられてもよいし、減圧弁６も圧力計も設けられていなくてもよい。 The configuration of the sterilization / deodorization system 1 is not limited to that illustrated in FIG. For example, a pressure adjustment valve may be provided between the two-fluid nozzle 2 and the liquid feed pump 3 instead of the pressure gauge 5, or a pressure adjustment valve may be provided in addition to the pressure gauge 5. Neither the pressure gauge 5 nor the pressure regulating valve may be provided. A pressure gauge may be provided between the two-fluid nozzle 2 and the compressor 4 instead of the pressure reducing valve (pressure adjusting valve) 6, or a pressure gauge may be provided in addition to the pressure reducing valve 6. The pressure reducing valve 6 and the pressure gauge need not be provided.
　既に説明したように、本願発明者は、オゾン保有力の高いオゾンＵＦＢ含有液をミスト化して噴霧したとしても、そのミスト平均径の大きさによっては、元のオゾンＵＦＢ含有液の殺菌力および／またはオゾン濃度が維持されない、という新規な課題を発見した。そして、本願発明者は、この課題を解決すべく鋭意検討を行った結果、オゾンガスを含むＵＦＢを含有する液体を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧することにより、十分な殺菌力および／またはオゾン濃度を維持し得ることを見出し、本願発明に想到した。以下、ミスト平均径を特定の範囲内に設定することによってこのような効果が得られることを説明する。 As already explained, even if the inventor of the present application sprays the ozone UFB-containing liquid having a high ozone retaining ability by mist, depending on the size of the mist average diameter, the sterilizing power of the original ozone UFB-containing liquid and / or Or discovered a new problem that the ozone concentration is not maintained. As a result of intensive studies to solve this problem, the inventor of the present application sprayed a liquid containing UFB containing ozone gas as a mist having a mist average diameter of 10 μm to 1000 μm. And it discovered that ozone concentration could be maintained and came up with the present invention. Hereinafter, it will be described that such an effect can be obtained by setting the mist average diameter within a specific range.
　［オゾンＵＦＢ含有液について］
　オゾンＵＦＢ含有液が高いオゾン保有力を有することを検証した結果を説明する。 [Ozone UFB-containing liquid]
The result of verifying that the ozone UFB-containing liquid has a high ozone holding power will be described.
　検証に際し、表１に示す２種類（条件（１）および（２））のオゾンＵＦＢ含有液を準備した。表１には、条件（１）および（２）のオゾンＵＦＢ含有液について、ｐＨ、ＵＦＢ平均径［ｎｍ］、ＵＦＢ標準偏差［ｎｍ］、ＵＦＢ密度［個／ｍｌ］およびオゾン濃度［ｍｇ／Ｌ］が示されている。 Upon verification, two types of ozone UFB-containing liquids (conditions (1) and (2)) shown in Table 1 were prepared. Table 1 shows the pH, UFB average diameter [nm], UFB standard deviation [nm], UFB density [units / ml], and ozone concentration [mg / L] for the ozone UFB-containing liquids of conditions (1) and (2). ]It is shown.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　ｐＨの測定は、アズワン株式会社製のハンディーｐＨ計「ＡＳ－６００」を用いて行った。「ＵＦＢ平均径」は、液体中に存在する全粒子（ＵＦＢを含む）の直径の算術平均値である。「ＵＦＢ標準偏差」は、液体中に存在する全粒子（ＵＦＢを含む）の直径の標準偏差である。「ＵＦＢ密度」は、液体１ｍｌあたりに存在する粒子（ＵＦＢを含む）の個数である。ＵＦＢ平均径、ＵＦＢ標準偏差およびＵＦＢ密度の測定は、日本カンタム・デザイン株式会社製のナノ粒子径・粒子数測定装置「ナノサイトＬＭ１０」を用いて行った。ＵＦＢ平均径、ＵＦＢ標準偏差およびＵＦＢ密度は、測定値のばらつきを軽減するため、それぞれ3回以上測定してその平均値とした。また、オゾン濃度の測定は、東亜ディーケーケー株式会社製のポータブル吸光光度計「ＤＲ８５０」と、オゾン試薬「ＨＡＣＨ１１８６」とを用いて行った。オゾン濃度も、測定値のばらつきを軽減するため、３回の測定値の平均値とした。 The pH was measured using a handy pH meter “AS-600” manufactured by AS ONE Corporation. “UFB average diameter” is an arithmetic average value of the diameters of all particles (including UFB) present in the liquid. “UFB standard deviation” is the standard deviation of the diameter of all particles (including UFB) present in the liquid. “UFB density” is the number of particles (including UFB) present per 1 ml of liquid. The UFB average diameter, UFB standard deviation, and UFB density were measured using a nanoparticle diameter / particle number measuring device “Nanosite LM10” manufactured by Nippon Quantum Design Co., Ltd. The UFB average diameter, UFB standard deviation, and UFB density were measured at least three times to obtain the average value in order to reduce variation in measured values. In addition, the ozone concentration was measured using a portable absorptiometer “DR850” manufactured by Toa DKK Corporation and an ozone reagent “HACH1186”. The ozone concentration was also an average value of three measured values in order to reduce variation in the measured values.
　まず、主成分が水である、条件（１）のオゾンＵＦＢ含有液を準備した。表１に示すように、条件（１）のオゾンＵＦＢ含有液では、ｐＨが７．７、ＵＦＢ平均径が１１９．９ｎｍ、ＵＦＢ標準偏差が３９．７ｎｍ、ＵＦＢ密度が９．２９×１０8個／ｍｌ、オゾン濃度が０．２７ｍｇ／Ｌであった。 First, the ozone UFB containing liquid of the condition (1) whose main component is water was prepared. As shown in Table 1, in the ozone UFB-containing liquid of the condition (1), the pH is 7.7, the UFB average diameter is 119.9 nm, the UFB standard deviation is 39.7 nm, and the UFB density is 9.29 × 10 8 pieces. / Ml, ozone concentration was 0.27 mg / L.
　次に、ＵＦＢ平均径、ＵＦＢ標準偏差およびＵＦＢ密度が異なるオゾンＵＦＢ含有液を準備するため、条件（１）のオゾンＵＦＢ含有液にクエン酸を適量加えてｐＨを５．８に調整することにより、条件（２）のオゾンＵＦＢ含有液を準備した。このような調整を行ったのは、ＵＦＢの気液界面は帯電している可能性があり、ｐＨの調整によってＵＦＢ平均径、ＵＦＢ標準偏差およびＵＦＢ密度を変化させることができると考えたからである。表１に示すように、条件（２）のオゾンＵＦＢ含有液では、ｐＨが５．８、ＵＦＢ平均径が２００．４ｎｍ、ＵＦＢ標準偏差が１０８．９ｎｍ、ＵＦＢ密度が５．５１×１０7個／ｍｌ、オゾン濃度が０．２５ｍｇ／Ｌであった。 Next, in order to prepare ozone UFB-containing liquids having different UFB average diameter, UFB standard deviation, and UFB density, an appropriate amount of citric acid is added to the ozone UFB-containing liquid of condition (1) to adjust the pH to 5.8. The ozone UFB containing liquid of the conditions (2) was prepared. The reason for this adjustment is that the gas-liquid interface of UFB may be charged, and it is thought that the UFB average diameter, UFB standard deviation, and UFB density can be changed by adjusting the pH. . As shown in Table 1, in the ozone UFB-containing liquid of the condition (2), the pH is 5.8, the UFB average diameter is 200.4 nm, the UFB standard deviation is 108.9 nm, and the UFB density is 5.51 × 10 7 pieces. / Ml, ozone concentration was 0.25 mg / L.
　条件（１）および（２）のいずれのオゾンＵＦＢ含有液についても、常温で２時間保持後にオゾン濃度は減少していなかった。また、条件（１）のオゾンＵＦＢ含有液については、１０℃以下で冷蔵保存を行うと、２カ月後でもオゾン濃度が減少することはなかった。なお、参考までに、純水のオゾン濃度を測定したところ、０．００ｍｇ／Ｌであった。これらのことから、条件（１）および（２）のいずれのオゾンＵＦＢ含有液についても、オゾンガスがＵＦＢの状態で液体中に存在することがわかる。 In any of the ozone UFB-containing liquids under conditions (1) and (2), the ozone concentration did not decrease after being held at room temperature for 2 hours. Moreover, about the ozone UFB containing liquid of the conditions (1), when refrigerated storage was performed at 10 degrees C or less, the ozone concentration did not decrease even after two months. For reference, the ozone concentration of pure water was measured and found to be 0.00 mg / L. From these facts, it is understood that ozone gas is present in the liquid in the UFB state in any of the ozone UFB-containing liquids in the conditions (1) and (2).
　［ミスト平均径について］
　条件（１）および（２）のオゾンＵＦＢ含有液を、図１に示した殺菌・脱臭システム１を用いてミスト化して噴霧する際の、空気圧力および液圧力の設定値と、二流体ノズル２から噴霧されるミスト８の平均径との相関関係を表２に示す。 [Mist average diameter]
The set values of the air pressure and the liquid pressure when the ozone UFB-containing liquid of the conditions (1) and (2) is sprayed by mist formation using the sterilization / deodorization system 1 shown in FIG. Table 2 shows the correlation with the average diameter of the mist 8 sprayed from the above.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　ミスト平均径の測定は、マイクロトラック・ベル株式会社製の粒子径分布測定装置「エアロトラックＬＤＳA－ＳＰＲ３５００Ａ」を用いて行った。この装置は、フランホーヘル回折法を測定原理とする。 The measurement of the mist average diameter was performed using a particle size distribution measuring device “Aerotrac LDSA-SPR3500A” manufactured by Microtrack Bell Co., Ltd. This apparatus uses the Franchohel diffraction method as a measurement principle.
　本願明細書において、「ミスト平均径」とは、一般的に液滴の粒子径の平均値として多く用いられるザウター平均粒子径を意味する。ザウター平均粒子径は、粒子直径をｎiとし、粒子数をｘiとするとき、Σｎiｘi 3／Σｎiｘi 2と表わされる値である。また、ミスト平均径の測定位置は、ミスト８が噴霧される対象物９の位置とする。ここでは、対象物９の位置を、二流体ノズル２の先端からミスト８の噴霧方向に沿って３０ｃｍ離れた位置としたので、その位置でのミスト平均径を測定した。また、測定値のばらつきを軽減するため、ミスト平均径は、５回の測定値の平均値とした。二流体ノズル２によるスプレーパターンは充円錐型である。空気圧力および液圧力を表２に示す値に設定したときの二流体ノズル２からの噴量は、約０．２～１５Ｌ／ｈであった。 In the present specification, the “mist average diameter” means a Sauter average particle diameter that is generally used as an average value of the particle diameter of droplets. The Sauter average particle diameter is a value represented as Σn i x i 3 / Σn i x i 2 where n i is the particle diameter and x i is the number of particles. The measurement position of the mist average diameter is the position of the object 9 to which the mist 8 is sprayed. Here, since the position of the object 9 was 30 cm away from the tip of the two-fluid nozzle 2 along the spray direction of the mist 8, the mist average diameter at that position was measured. Moreover, in order to reduce the dispersion | variation in a measured value, the mist average diameter was made into the average value of 5 times of measured values. The spray pattern by the two-fluid nozzle 2 is a full cone type. When the air pressure and liquid pressure were set to the values shown in Table 2, the injection amount from the two-fluid nozzle 2 was about 0.2 to 15 L / h.
　表２から、空気圧力に対する液圧力の比が大きくなるほど（液圧力に対する空気圧力の比が小さくなるほど）、ミスト平均径が大きくなることがわかる。つまり、空気圧力および液圧力を適切に設定することにより、ミスト平均径を制御できる（具体的には１０μｍ以上１０００μｍ以下にできる）ことがわかる。 From Table 2, it can be seen that the larger the ratio of the liquid pressure to the air pressure (the smaller the ratio of the air pressure to the liquid pressure), the larger the mist average diameter. That is, it can be seen that the mist average diameter can be controlled (specifically, 10 μm or more and 1000 μm or less) by appropriately setting the air pressure and the liquid pressure.
　［殺菌力およびオゾン濃度］
　ミスト平均径が表２に示した値である場合に、元のオゾンＵＦＢ含有液が有する殺菌力およびオゾン濃度がミスト化後も維持されるか否かについて、検証を行った。検証は、条件（１）のオゾンＵＦＢ含有液を用いて行った。検証の結果を、表３および図３に示す。 [Bactericidal power and ozone concentration]
When the mist average diameter is the value shown in Table 2, it was verified whether or not the bactericidal power and ozone concentration of the original ozone UFB-containing liquid are maintained after mist formation. The verification was performed using the ozone UFB-containing liquid under the condition (1). The results of verification are shown in Table 3 and FIG.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　表３は、ミスト平均径が７．２μｍ、７．４μｍ、７．５μｍ、１０．０μｍ、１２．１μｍおよび３９．７μｍである場合の、オゾン濃度［ｍｇ／Ｌ］、オゾン濃度減少率［％］および大腸菌生存率を示している。表３には、ミスト化前のオゾンＵＦＢ含有液のオゾン濃度および大腸菌生存率も示している。図３は、横軸にミスト平均径［μｍ］をとり、縦軸にオゾン濃度減少率［％］および大腸菌生存率をとったグラフである。 Table 3 shows the ozone concentration [mg / L] and ozone concentration reduction rate [%] when the mist average diameter is 7.2 μm, 7.4 μm, 7.5 μm, 10.0 μm, 12.1 μm, and 39.7 μm. ] And E. coli viability. Table 3 also shows the ozone concentration and the E. coli survival rate of the ozone UFB-containing liquid before mist formation. FIG. 3 is a graph in which the horizontal axis represents the mist average diameter [μm], and the vertical axis represents the ozone concentration reduction rate [%] and the E. coli survival rate.
　なお、ミスト状態でのオゾン濃度や大腸菌生存率を測定することは困難であるので、対象物９の位置（ここでは、二流体ノズル２から噴霧方向に沿って３０ｃｍ離れた位置）でのミスト８を捕集し、所定の液量（具体的には約５０ｍｌ）としたサンプルのオゾン濃度および大腸菌生存率を測定した。オゾンＵＦＢ含有液７が有する殺菌力およびオゾン濃度がミスト化によって減少するのであれば、当然ながらミストを捕集して得たサンプルでも殺菌力およびオゾン濃度は減少しているはずである。逆に言うと、ミストは、ミストの捕集により得られたサンプルと、少なくとも同程度の殺菌力およびオゾン濃度を有していると言える。オゾン濃度の測定は、東亜ディーケーケー株式会社製のポータブル吸光光度計「ＤＲ８５０」と、オゾン試薬「ＨＡＣＨ１１８６」とを用いて行った。また、オゾン濃度は、測定値のばらつきを軽減するため、３回の測定値の平均値とした。オゾン濃度減少率は、ミスト化前のオゾンＵＦＢ含有液のオゾン濃度を１００％とした場合に、ミスト化後のオゾン濃度がミスト化前のオゾン濃度から何％減少したかを計算した値であり、［１００×｛（ミスト化前のオゾン濃度）－（ミスト化後のオゾン濃度）｝／（ミスト化前のオゾン濃度）］と表わされる値である。大腸菌生存率の測定には、スリーエムヘルスケア株式会社製の「ペトリフィルム（登録商標）培地　大腸菌群数測定用ＣＣプレート」を用いた。大腸菌生存率の測定は、具体的には、以下のようにして行った。まず、適度に希釈した大腸菌液と純水とを１：９の割合で混合し、１分後にその混合液をペトリフィルム上に適量滴下し、３５℃で２４時間培養後にカウントした菌数を１とする。そして、大腸菌液とミスト化前またはミスト化後のオゾンＵＦＢ含有液を１：９で混合して１分後にその混合液をペトリフィルム上に適量滴下し、３５℃で２４時間培養後にカウントした菌数の割合を計算した。すなわち、大腸菌生存率は、ミスト化前またはミスト化後のオゾンＵＦＢ含有液の殺菌力を示す値である。 Since it is difficult to measure the ozone concentration and the E. coli survival rate in the mist state, the mist 8 at the position of the object 9 (here, a position 30 cm away from the two-fluid nozzle 2 along the spray direction). Were collected, and the ozone concentration and the Escherichia coli survival rate of a sample having a predetermined liquid volume (specifically, about 50 ml) were measured. If the sterilizing power and the ozone concentration of the ozone UFB-containing liquid 7 are reduced by mist formation, the sterilizing power and the ozone concentration should naturally be reduced even in the sample obtained by collecting the mist. Conversely, it can be said that the mist has at least the same level of bactericidal power and ozone concentration as the sample obtained by collecting the mist. The ozone concentration was measured using a portable absorptiometer “DR850” manufactured by Toa DKK Corporation and an ozone reagent “HACH1186”. In addition, the ozone concentration was an average value of three measurement values in order to reduce variation in the measurement values. The ozone concentration reduction rate is a value calculated by calculating how much the ozone concentration after mist formation has decreased from the ozone concentration before mist formation when the ozone concentration of the ozone UFB-containing liquid before mist formation is 100%. , [100 × {(ozone concentration before mist) − (ozone concentration after mist)} / (ozone concentration before mist)]. For the measurement of the E. coli survival rate, “Petrifilm (registered trademark) medium CC plate for measuring E. coli group count” manufactured by 3M Healthcare Co., Ltd. was used. Specifically, the measurement of the survival rate of E. coli was performed as follows. First, a moderately diluted Escherichia coli solution and pure water were mixed at a ratio of 1: 9, and after 1 minute, an appropriate amount of the mixture was dropped onto a Petri film, and the number of bacteria counted after incubation at 35 ° C. for 24 hours was 1 And The Escherichia coli solution and the pre-misted or post-misted ozone UFB-containing solution were mixed at 1: 9, and after 1 minute, an appropriate amount of the mixed solution was dropped on a Petri film, and the bacteria counted after incubation at 35 ° C. for 24 hours. The percentage of numbers was calculated. That is, the Escherichia coli survival rate is a value indicating the bactericidal power of the ozone UFB-containing liquid before or after mist formation.
　表３から、ミスト化前のオゾンＵＦＢ含有液では、大腸菌生存率が１．０×１０-4未満と非常に小さく、ミスト化前のオゾンＵＦＢ含有液が高い殺菌力を有していることがわかる。また、表３および図３から、ミストの平均径が１０μｍ以上の場合、ミスト化後であってもミスト化前と同様、大腸菌生存率が１．０×１０-4未満であり、ミスト化前と同様の殺菌力がミスト化後にも維持されていることがわかる。これに対し、ミストの平均径が１０μｍ以下の場合は、大腸菌生存率が１．０×１０-3以上となる。つまり、ミスト化後には、大腸菌生存率がミスト化前よりも１桁以上大きくなっており、ミスト化後に殺菌力が減少してミスト化前の殺菌力が維持されない。 From Table 3, it can be seen that the ozone UFB-containing liquid before mist formation has a very small E. coli survival rate of less than 1.0 × 10 −4, and the ozone UFB-containing liquid before mist formation has a high bactericidal power. Recognize. Further, from Table 3 and FIG. 3, when the average diameter of the mist is 10 μm or more, the viability of E. coli is less than 1.0 × 10 −4 even before the mist formation even after the mist formation. It can be seen that the same sterilizing power is maintained after mist formation. On the other hand, when the average diameter of the mist is 10 μm or less, the survival rate of E. coli is 1.0 × 10 −3 or more. That is, after the mist formation, the survival rate of Escherichia coli is larger by one digit or more than before the mist formation, and the sterilization power decreases after the mist formation, and the sterilization power before the mist formation is not maintained.
　また、表３および図３からわかるように、大腸菌生存率は、オゾン濃度減少率に依存しており、オゾン濃度減少率が大きくなるほど大腸菌生存率も大きくなり、殺菌力が減少する。ここで、ミスト化前の殺菌力、すなわち大腸菌生存率が維持されるオゾン濃度減少率の値を閾値とすると、その閾値は２５%となる。つまり、オゾン濃度減少率が２５%以下のときには、表３および図３に示されるように、ミスト化前のオゾンＵＦＢ含有液の殺菌力が十分に維持されることがわかる。従って、オゾン濃度減少率が２５%以下であると、オゾン濃度が十分に維持されていると言える。 Also, as can be seen from Table 3 and FIG. 3, the E. coli survival rate depends on the ozone concentration reduction rate, and as the ozone concentration reduction rate increases, the E. coli survival rate also increases and the bactericidal power decreases. Here, assuming that the bactericidal power before mist formation, that is, the ozone concentration reduction rate at which the survival rate of Escherichia coli is maintained, is the threshold value, the threshold value is 25%. That is, when the ozone concentration reduction rate is 25% or less, as shown in Table 3 and FIG. 3, it can be seen that the sterilizing power of the ozone UFB-containing liquid before mist formation is sufficiently maintained. Therefore, it can be said that the ozone concentration is sufficiently maintained when the ozone concentration reduction rate is 25% or less.
　上述したように、条件（１）のオゾンＵＦＢ含有液を平均径が１０μｍ以上のミストとして噴霧することにより、ミスト化前の殺菌力およびオゾン濃度が十分に維持されることが確認された。 As described above, it was confirmed that the bactericidal power and ozone concentration before mist formation were sufficiently maintained by spraying the ozone UFB-containing liquid of the condition (1) as a mist having an average diameter of 10 μm or more.
　次に、条件（２）のオゾンＵＦＢ含有液についても、元のオゾンＵＦＢ含有液が有するオゾン濃度がミスト化後に維持されるか否かについて、検証を行った。検証の結果を、表４および図４に示す。 Next, the ozone UFB-containing liquid of the condition (2) was also verified as to whether or not the ozone concentration of the original ozone UFB-containing liquid is maintained after mist formation. The results of verification are shown in Table 4 and FIG.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　表４は、条件（２）のオゾンＵＦＢ含有液について、ミスト平均径が７．４μｍ、７．５μｍ、１０．０μｍ、１２．１μｍおよび３９．７μｍである場合の、オゾン濃度［ｍｇ／Ｌ］およびオゾン濃度減少率［％］を示している。表４には、条件（１）のオゾンＵＦＢ含有液についてのオゾン濃度およびオゾン濃度減少率も示している。図４は、横軸にミスト平均径［μｍ］をとり、縦軸にオゾン濃度減少率［％］をとったグラフである。 Table 4 shows the ozone concentration [mg / L] when the mist average diameter is 7.4 μm, 7.5 μm, 10.0 μm, 12.1 μm, and 39.7 μm for the ozone UFB-containing liquid of condition (2). And ozone concentration reduction rate [%]. Table 4 also shows the ozone concentration and the ozone concentration reduction rate for the ozone UFB-containing liquid of condition (1). FIG. 4 is a graph in which the horizontal axis represents the mist average diameter [μm] and the vertical axis represents the ozone concentration reduction rate [%].
　表４および図４から、条件（２）のオゾンＵＦＢ含有液についても、条件（１）のオゾンＵＦＢ含有液と同様、ミスト平均径が１０μｍ以上であることによって、ミスト化前のオゾン濃度が十分に維持されることがわかる。表１に示すように、条件（１）と条件（２）とでは、オゾンＵＦＢ含有液の特性値（ＵＦＢ平均径、ＵＦＢ標準偏差およびＵＦＢ密度）が大きく異なっている。それにも関わらず、条件（１）および（２）の両方とも、ミスト平均径を１０μｍ以上とすることによってミスト化前のオゾン濃度が十分に維持された。このように、オゾンＵＦＢ含有液をミスト平均径が１０μｍ以上のミストとして噴霧することにより、ミスト化前のオゾン濃度を十分に維持、すなわち殺菌力を十分に維持することができる。 From Table 4 and FIG. 4, the ozone UFB-containing liquid of condition (2) also has a sufficient ozone concentration before mist formation because the mist average diameter is 10 μm or more, similarly to the ozone UFB-containing liquid of condition (1). It can be seen that As shown in Table 1, the characteristic values (UFB average diameter, UFB standard deviation, and UFB density) of the ozone UFB-containing liquid are greatly different between the condition (1) and the condition (2). Nevertheless, in both conditions (1) and (2), the ozone concentration before mist formation was sufficiently maintained by setting the mist average diameter to 10 μm or more. Thus, by spraying the ozone UFB-containing liquid as a mist having a mist average diameter of 10 μm or more, the ozone concentration before mist formation can be sufficiently maintained, that is, the bactericidal power can be sufficiently maintained.
　なお、殺菌力およびオゾン濃度の維持の観点からは、ミスト平均径の上限に制限はないが、ミスト平均径が大きすぎると、殺菌・脱臭に要するオゾンＵＦＢ含有液の量が多くなることがある。ミスト平均径が１０００μｍ以下であることにより、少量のオゾンＵＦＢ含有液で比較的広い範囲を殺菌・脱臭し得るという効果が得られる。 From the standpoint of maintaining sterilizing power and ozone concentration, there is no limit on the upper limit of the mist average diameter, but if the mist average diameter is too large, the amount of ozone UFB-containing liquid required for sterilization / deodorization may increase. . When the mist average diameter is 1000 μm or less, an effect is obtained that a relatively wide range can be sterilized and deodorized with a small amount of ozone UFB-containing liquid.
　［殺菌・脱臭システムの他の例］
　これまで説明した検証結果は、図１に示すような、二流体ノズル２を用いる方式の殺菌・脱臭システム１での結果である。他の２つの方式の殺菌・脱臭システムについても、条件（１）のオゾンＵＦＢ含有液を用いてオゾン濃度が維持されるか否かを検証した。 [Other examples of sterilization / deodorization systems]
The verification results described so far are the results of the sterilization / deodorization system 1 using the two-fluid nozzle 2 as shown in FIG. For the other two types of sterilization / deodorization systems, it was verified whether the ozone concentration was maintained using the ozone UFB-containing liquid of the condition (1).
　検証した２つの方式のうちの１つは、圧力噴射弁方式である。圧力噴射弁方式では、一流体ノズルに送液ポンプを接続し、液体の圧力を利用してミスト化を行う。もう１つの方式は、ハンディータイプのスプレーボトル（ボトル先端にノズル構造を有しており、ノズルから液体がミストとして噴霧される）を用いる方式である。前者の方式では、対象物の位置をノズル先端から３０ｃｍ離れた位置とし、後者の方式では、対象物の位置をノズル先端から５ｃｍ離れた位置とした。それぞれの方式において、対象物の位置でのミスト平均径は、１０μｍ以上１０００μｍ以下である。 １ One of the two verified methods is the pressure injection valve method. In the pressure injection valve system, a liquid feed pump is connected to one fluid nozzle, and mist formation is performed using the pressure of the liquid. The other method is a method using a handy type spray bottle (having a nozzle structure at the tip of the bottle, and the liquid is sprayed as a mist from the nozzle). In the former method, the position of the object is 30 cm away from the nozzle tip, and in the latter method, the object position is 5 cm away from the nozzle tip. In each method, the mist average diameter at the position of the object is 10 μm or more and 1000 μm or less.
　圧力噴射弁方式の殺菌・脱臭システムにおいて、オゾン濃度が０．５８ｍｇ／ＬのオゾンＵＦＢ含有液をミスト化したところ、対象物の位置でのミストを捕集して測定したミスト化後のオゾン濃度は０．４８ｍｇ／Ｌであり、オゾン濃度減少率は１７．２％であった。 In a pressure injection valve type sterilization / deodorization system, when ozone UFB containing liquid with an ozone concentration of 0.58 mg / L is mist, the ozone concentration after mist is measured by collecting mist at the position of the object Was 0.48 mg / L, and the ozone concentration reduction rate was 17.2%.
　また、ハンディータイプのスプレーボトルを用いる方式の殺菌・脱臭システムにおいて、オゾン濃度が０．２４ｍｇ／ＬのオゾンＵＦＢ含有液をミスト化したところ、対象物の位置でのミストを捕集して測定したミスト化後のオゾン濃度は０．２０ｍｇ／Ｌであり、オゾン濃度減少率は１６．７％であった。 In addition, in a sterilization / deodorization system using a handy type spray bottle, an ozone UFB-containing liquid having an ozone concentration of 0.24 mg / L was misted, and the mist at the position of the object was collected and measured. The ozone concentration after mist formation was 0.20 mg / L, and the ozone concentration reduction rate was 16.7%.
　このように、図１に示す殺菌・脱臭システム１とは異なる方式の殺菌・脱臭システムであっても、ミスト平均径を１０μｍ以上に設定することによって、元のオゾンＵＦＢ含有液の殺菌力を十分に維持することができる。 As described above, even if the sterilization / deodorization system is different from the sterilization / deodorization system 1 shown in FIG. 1, the sterilization power of the original ozone UFB-containing liquid is sufficiently increased by setting the mist average diameter to 10 μm or more. Can be maintained.
　なお、オゾンガスを純水中で発生させることによって純水中にオゾンガスを溶解させた（「ガス溶解式」と呼ばれる）オゾン水についても、圧力噴射弁方式の殺菌・脱臭システムを用いてオゾン濃度減少率を検証した。その結果、オゾン濃度が０．４８ｍｇ／Ｌのオゾン水では、対象物の位置におけるミスト平均径が１０μｍ以上１０００μｍ以下であるにも関わらず、ミスト化後のオゾン濃度は０．１４ｍｇ／Ｌであり、オゾン濃度減少率は７０．８%であった。このように、オゾンがＵＦＢの状態で混入されていない場合には、ミスト平均径が１０μｍ以上１０００μｍ以下であってもオゾン濃度が十分には維持されないことが確認された。 In addition, ozone concentration is reduced by using a pressure injection valve type sterilization / deodorization system for ozone water that is dissolved in pure water by generating ozone gas in pure water. The rate was verified. As a result, in ozone water with an ozone concentration of 0.48 mg / L, the ozone concentration after mist formation is 0.14 mg / L, even though the mist average diameter at the position of the object is 10 μm or more and 1000 μm or less. The ozone concentration reduction rate was 70.8%. Thus, when ozone was not mixed in the UFB state, it was confirmed that the ozone concentration was not sufficiently maintained even if the mist average diameter was 10 μm or more and 1000 μm or less.
　上述したように、本実施形態における殺菌・脱臭方法は、オゾンガスを含むウルトラファインバブル（ＵＦＢ）を含有する液体を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧することによって、対象物を殺菌・脱臭する方法である。これにより、本願発明者が発見した新たな課題（オゾン保有力の比較的高いオゾンＵＦＢ含有液をミスト化して噴霧したとしても、ミスト平均径の大きさによっては元のオゾンＵＦＢ含有液の殺菌力および／またはオゾン濃度が維持されない）を解決することが可能となる。本実施形態の殺菌・脱臭方法（ミスト生成方法）を用いると、オゾンＵＦＢ含有液の有する殺菌力および／またはオゾン濃度が十分に維持された状態のミストが対象物に噴霧されるので、少量のオゾンＵＦＢ含有液で広範囲の対象物を殺菌・脱臭可能である。 As described above, the sterilization / deodorization method in the present embodiment sterilizes an object by spraying a liquid containing ultrafine bubbles (UFB) containing ozone gas as a mist having a mist average diameter of 10 μm or more and 1000 μm or less.・ This is a deodorizing method. As a result, a new problem discovered by the inventor of the present application (even if the ozone UFB-containing liquid having a relatively high ozone holding power is misted and sprayed, the sterilizing power of the original ozone UFB-containing liquid depends on the size of the mist average diameter. And / or ozone concentration is not maintained). When the sterilization / deodorization method (mist generation method) of the present embodiment is used, a mist in a state where the sterilization power and / or ozone concentration of the ozone UFB-containing liquid is sufficiently maintained is sprayed on the object. A wide range of objects can be sterilized and deodorized with an ozone UFB-containing liquid.
　なお、本実施形態の殺菌・脱臭方法に用いられる殺菌・脱臭システムは、例示した３つの方式の殺菌・脱臭システム（図１に示すような二流体ノズル２を備えた殺菌・脱臭システム、圧力噴射弁方式の殺菌・脱臭システム、ハンディータイプのスプレーボトルを用いた殺菌・脱臭システム）に限定されない。オゾンＵＦＢ含有液をミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧することが可能な殺菌・脱臭システムであれば、本実施形態の殺菌・脱臭方法に好適に用いることができる。 The sterilization / deodorization system used in the sterilization / deodorization method of the present embodiment includes three exemplified sterilization / deodorization systems (sterilization / deodorization system including a two-fluid nozzle 2 as shown in FIG. 1, pressure injection It is not limited to a valve-type sterilization / deodorization system or a sterilization / deodorization system using a handy type spray bottle. Any sterilization / deodorization system capable of spraying an ozone UFB-containing liquid as a mist having a mist average diameter of 10 μm or more and 1000 μm or less can be suitably used for the sterilization / deodorization method of the present embodiment.
　（実施形態２）
　図５を参照しながら、本実施形態におけるミスト生成装置１０を説明する。図５は、ミスト生成装置１０を模式的に示す図である。 (Embodiment 2)
The mist generating apparatus 10 in the present embodiment will be described with reference to FIG. FIG. 5 is a diagram schematically showing the mist generating device 10.
　ミスト生成装置１０は、図５に示すように、貯蔵部１１と、ミスト生成部１２とを備える。 The mist production | generation apparatus 10 is provided with the storage part 11 and the mist production | generation part 12 as shown in FIG.
　貯蔵部１１は、オゾンガスを含むＵＦＢ（直径１μｍ以下の気泡）を含有する液体（オゾンＵＦＢ含有液）を貯蔵する。 The storage unit 11 stores a liquid (ozone UFB-containing liquid) containing UFB (bubbles having a diameter of 1 μm or less) containing ozone gas.
　貯蔵部１１には、ミスト生成装置１０の使用前に、オゾンＵＦＢ含有液が貯蔵される。貯蔵部１１は、オゾンＵＦＢ含有液に空気が触れないような密閉構造を有することが好ましい。これにより、オゾンＵＦＢ含有液からオゾンが抜けていくことを防止し、オゾンＵＦＢ含有液のオゾン保有力をいっそう高くすることができる。 The storage unit 11 stores an ozone UFB-containing liquid before using the mist generating device 10. The storage unit 11 preferably has a sealed structure so that air does not touch the ozone UFB-containing liquid. Thereby, it is possible to prevent the ozone from being removed from the ozone UFB-containing liquid, and to further increase the ozone holding power of the ozone UFB-containing liquid.
　また、貯蔵部１１は、オゾンＵＦＢ含有液の温度を所定の温度以下（例えば１０℃以下）に保つことができる保冷部を含むことが好ましい。これにより、オゾンＵＦＢ含有液からオゾンが抜けていくことを防止し、オゾンＵＦＢ含有液のオゾン保有力をいっそう高くすることができる。 Moreover, it is preferable that the storage unit 11 includes a cold insulating unit that can maintain the temperature of the ozone UFB-containing liquid at a predetermined temperature or lower (for example, 10 ° C. or lower). Thereby, it is possible to prevent the ozone from being removed from the ozone UFB-containing liquid, and to further increase the ozone holding power of the ozone UFB-containing liquid.
　貯蔵部１１は、オゾン耐性を有する材料から形成されていることが好ましく、具体的には、ガラスやステンレス鋼（表面にクロムによる強固な不動体膜が形成されるのでオゾンによる酸化の進行が極めて緩慢となる）、フッ素樹脂（ＰＦＡ、ＰＴＦＥなど）などから形成されていることが好ましい。これにより、オゾンによる貯蔵部１１の劣化を防止することができるので、ミスト生成装置１０の長寿命化を図ることができる。 The storage unit 11 is preferably formed of a material having ozone resistance. Specifically, glass or stainless steel (a strong non-moving film made of chromium is formed on the surface, so that the oxidation by ozone is extremely advanced. It is preferably made of a fluororesin (PFA, PTFE, etc.). Thereby, since degradation of the storage unit 11 due to ozone can be prevented, the life of the mist generating device 10 can be extended.
　ミスト生成部１２は、貯蔵部１１に貯蔵されているオゾンＵＦＢ含有液を対象物にミスト８として噴霧する。より具体的には、ミスト生成部１２は、オゾンＵＦＢ含有液をミスト平均径が１０μｍ以上１０００μｍ以下のミスト８として噴霧する。 The mist generating unit 12 sprays the ozone UFB-containing liquid stored in the storage unit 11 as a mist 8 on the object. More specifically, the mist production | generation part 12 sprays the ozone UFB containing liquid as the mist 8 whose mist average diameter is 10 micrometers or more and 1000 micrometers or less.
　ミスト生成部１２によるミスト８の生成方式は、特に限定されない。例えば、実施形態１において説明したような、二流体ノズルを用いることができる。この場合、ミスト生成部１２は、例えば、送液ポンプ、コンプレッサー、二流体ノズルなどから構成されるが、勿論この構成に限定されるものではない。二流体ノズルを用いると、ミスト微細化性能に優れる、ミスト平均径を容易に制御可能である、噴霧流量の調整範囲が大きい、比較的大きな径の異物を通過させることができる、などの利点が得られる。 The generation method of the mist 8 by the mist generation unit 12 is not particularly limited. For example, a two-fluid nozzle as described in Embodiment 1 can be used. In this case, the mist generation unit 12 includes, for example, a liquid feed pump, a compressor, a two-fluid nozzle, and the like, but is not limited to this configuration. The use of a two-fluid nozzle has advantages such as excellent mist refinement performance, easy control of the mist average diameter, large adjustment range of the spray flow rate, and passage of relatively large foreign matter. can get.
　また、実施形態１において説明したような圧力噴射弁方式の一流体ノズルを用いてもよい。この場合、ミスト生成部１２は、送液ポンプ、一流体ノズルなどから構成される。一流体ノズルを用いると、構成部品を少なくすることができる（コンプレッサーが不要となる）、コストパフォーマンスに優れる、噴霧流量を調節可能、などの利点が得られる。 Alternatively, a one-fluid nozzle of the pressure injection valve type as described in the first embodiment may be used. In this case, the mist production | generation part 12 is comprised from a liquid feeding pump, a 1 fluid nozzle, etc. When a single fluid nozzle is used, there are advantages such that the number of components can be reduced (no compressor is required), the cost performance is excellent, and the spray flow rate can be adjusted.
　また、実施形態１において説明したようなハンディータイプのスプレーボトルに用いられているノズル構成を用いてもよい。この場合、構成部品を非常に少なくすることができる（コンプレッサーも送液ポンプも不要となる）、非常にコストパフォーマンスに優れる、装置全体を軽量化できる、などの利点が得られる。 Further, the nozzle configuration used in the handy type spray bottle as described in the first embodiment may be used. In this case, there can be obtained such advantages that the number of components can be greatly reduced (no compressor or liquid feed pump is required), the cost performance is excellent, and the entire apparatus can be reduced in weight.
　なお、オゾンＵＦＢ含有液をミスト平均径が１０μｍ以上１０００μｍ以下のミスト８として噴霧することが可能であれば、一般的に加湿器に用いられているミスト生成方式である気化方式、蒸気方式、超音波方式などを用いてもよい。これらの方式を用いると、既に市場に出回っている部品を共有化できるので、汎用性が高く、ミスト生成装置１０を安価に製造することができるという利点が得られる。 If the ozone UFB-containing liquid can be sprayed as a mist 8 having an average mist diameter of 10 μm or more and 1000 μm or less, a vaporization method, a steam method, an ultra mist generation method generally used in humidifiers can be used. A sound wave method or the like may be used. When these methods are used, since parts already on the market can be shared, there is an advantage that versatility is high and the mist generating device 10 can be manufactured at low cost.
　ミスト生成部１２の構成要素も、オゾン耐性を有する材料から形成されていることが好ましく、具体的には、ガラスやステンレス鋼（表面にクロムによる強固な不動体膜が形成されるのでオゾンによる酸化の進行が極めて緩慢となる）、フッ素樹脂（ＰＦＡ、ＰＴＦＥなど）などから形成されていることが好ましい。これにより、オゾンによるミスト生成部１２の劣化を防止することができるので、ミスト生成装置１０の長寿命化を図ることができる。 It is preferable that the constituent elements of the mist generating unit 12 are also formed of a material having ozone resistance. Specifically, glass or stainless steel (a strong non-moving film made of chromium is formed on the surface, so oxidation by ozone Is preferably made of a fluororesin (PFA, PTFE, etc.). Thereby, since deterioration of the mist production | generation part 12 by ozone can be prevented, the lifetime improvement of the mist production | generation apparatus 10 can be achieved.
　上述したように、本実施形態におけるミスト生成装置１０は、オゾンＵＦＢ含有液を貯蔵する貯蔵部１１と、オゾンＵＦＢ含有液をミスト平均径が１０μｍ以上１０００μｍ以下のミスト８として噴霧するミスト生成部１２とを備える。そのため、オゾンＵＦＢ含有液の殺菌力および／またはオゾン濃度が十分に維持された状態のミスト８を対象物に噴霧することが可能となり、少量のオゾンＵＦＢ含有液で広範囲の対象物を殺菌・脱臭することが可能となる。また、本実施形態におけるミスト生成装置１０は、オゾンＵＦＢ含有液を生成するための構成要素を有していないので、構成部品を減らすことが可能であり、ミスト生成装置１０の製造コストを安価にすることができる。 As described above, the mist generating apparatus 10 in the present embodiment includes the storage unit 11 that stores the ozone UFB-containing liquid, and the mist generating unit 12 that sprays the ozone UFB-containing liquid as the mist 8 having a mist average diameter of 10 μm to 1000 μm. With. Therefore, it becomes possible to spray the mist 8 in a state in which the sterilizing power and / or ozone concentration of the ozone UFB-containing liquid is sufficiently maintained, and sterilize and deodorize a wide range of objects with a small amount of the ozone UFB-containing liquid. It becomes possible to do. Moreover, since the mist production | generation apparatus 10 in this embodiment does not have the component for producing | generating an ozone UFB containing liquid, it is possible to reduce a component and make the manufacturing cost of the mist production | generation apparatus 10 inexpensive. can do.
　（実施形態３）
　図６を参照しながら、本実施形態におけるミスト生成装置２０を説明する。図６は、ミスト生成装置２０を模式的に示す図である。以下では、ミスト生成装置２０が、実施形態２におけるミスト生成装置１０と異なる点を中心に説明を行う。 (Embodiment 3)
The mist generating apparatus 20 in the present embodiment will be described with reference to FIG. FIG. 6 is a diagram schematically showing the mist generating device 20. Below, the mist production | generation apparatus 20 demonstrates centering around a different point from the mist production | generation apparatus 10 in Embodiment 2. FIG.
　ミスト生成装置２０は、オゾンガス生成部２３と、オゾンＵＦＢ含有液生成部２４と、ミスト生成部２２とを備える。つまり、ミスト生成装置２０は、オゾンガス生成部２３およびオゾンＵＦＢ含有液生成部２４を備える点において、実施形態２のミスト生成装置１０と異なっている。また、ミスト生成装置２０は、貯蔵部を備えていない点においても、実施形態２のミスト生成装置１０と異なっている。 The mist generator 20 includes an ozone gas generator 23, an ozone UFB-containing liquid generator 24, and a mist generator 22. That is, the mist generating device 20 is different from the mist generating device 10 of the second embodiment in that the ozone mist generating device 23 and the ozone UFB-containing liquid generating unit 24 are provided. Moreover, the mist production | generation apparatus 20 differs from the mist production | generation apparatus 10 of Embodiment 2 also in the point which is not provided with the storage part.
　オゾンガス生成部２３は、オゾンガスを生成する。オゾンガスの生成方式は、特に限定されず、種々の方式を用いることができる。例えば、無声放電方式やコロナ放電方式などの放電法、電解法、紫外線ランプ法などを用いることができる。放電法は、生産コストが非常に安価であるという利点を有する。電解法は、有害な窒素酸化物（ＮＯｘ）を副次的に生成することがないという利点を有する。紫外線ランプ法は、オゾンガスを簡易に生成できるという利点を有する。 The ozone gas generator 23 generates ozone gas. The generation method of the ozone gas is not particularly limited, and various methods can be used. For example, a discharge method such as a silent discharge method or a corona discharge method, an electrolysis method, an ultraviolet lamp method, or the like can be used. The discharge method has the advantage that the production cost is very low. The electrolytic process has the advantage that no harmful nitrogen oxides (NOx) are produced as a secondary. The ultraviolet lamp method has an advantage that ozone gas can be easily generated.
　オゾンＵＦＢ含有液生成部２４は、オゾンガス生成部２３によって生成されたオゾンガスを用いて、すなわち、オゾンガス生成部２３によって生成されたオゾンガスを含むＵＦＢを含有するオゾンＵＦＢ含有液を生成する。オゾンＵＦＢ含有液の生成方式は、特に限定されず、種々の方式を用いることができる。例えば、旋回流方式、スタティックミキサー方式、エジェクター方式、ベンチュリー方式、加圧溶解方式、キャビテーション方式、超微細孔方式、回転方式、超音波方式、振動多孔板方式、電気分解方式およびこれらを組み合わせた方式などを用いることができる。旋回流方式は、装置構成を比較的簡単にできるという利点を有する。 The ozone UFB-containing liquid generating unit 24 uses the ozone gas generated by the ozone gas generating unit 23, that is, generates an ozone UFB-containing liquid containing UFB containing the ozone gas generated by the ozone gas generating unit 23. The generation method of the ozone UFB-containing liquid is not particularly limited, and various methods can be used. For example, swirling flow method, static mixer method, ejector method, venturi method, pressure dissolution method, cavitation method, ultrafine pore method, rotation method, ultrasonic method, vibrating perforated plate method, electrolysis method, and a combination of these methods Etc. can be used. The swirl flow system has the advantage that the device configuration can be made relatively simple.
　ミスト生成部２２は、オゾンＵＦＢ含有液生成部２４によって生成されたオゾンＵＦＢ含有液を対象物にミスト８として噴霧する。より具体的には、ミスト生成部２２は、オゾンＵＦＢ含有液をミスト平均径が１０μｍ以上１０００μｍ以下のミスト８として噴霧する。ミスト生成部２２によるミスト８の生成方式としては、実施形態２のミスト生成装置１０のミスト生成部１２と同様に種々の方式を用いることができる。 The mist production | generation part 22 sprays the ozone UFB containing liquid produced | generated by the ozone UFB containing liquid production | generation part 24 as the mist 8 on a target object. More specifically, the mist production | generation part 22 sprays the ozone UFB containing liquid as the mist 8 whose mist average diameter is 10 micrometers or more and 1000 micrometers or less. As a generation method of the mist 8 by the mist generation unit 22, various methods can be used as in the mist generation unit 12 of the mist generation device 10 of the second embodiment.
　上述したように、本実施形態におけるミスト生成装置２０は、オゾンガスを生成するオゾンガス生成部２３と、オゾンガス生成部２３で生成されたオゾンガスを含むＵＦＢを含有するオゾンＵＦＢ含有液を生成する気泡含有液生成部２４と、オゾンＵＦＢ含有液生成部２４で生成されたオゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下となるミスト８として噴霧するミスト生成部２２とを備える。そのため、オゾンＵＦＢ含有液の殺菌力および／またはオゾン濃度が十分に維持された状態のミスト８を対象物に噴霧することが可能となり、少量のオゾンＵＦＢ含有液で広範囲の対象物を殺菌・脱臭することが可能となる。また、本実施形態におけるミスト生成装置２０は、オゾンＵＦＢ含有液を生成するオゾンＵＦＢ含有液生成部２４を有しているので、オゾンＵＦＢ含有液を別途に用意する必要がないので、ミスト生成装置２０のランニングコストを抑えることができる。 As described above, the mist generating device 20 in the present embodiment includes the ozone gas generating unit 23 that generates ozone gas, and the bubble-containing liquid that generates an ozone UFB-containing liquid that contains UFB containing the ozone gas generated by the ozone gas generating unit 23. The production | generation part 24 and the mist production | generation part 22 which sprays the ozone UFB containing liquid produced | generated by the ozone UFB containing liquid production | generation part 24 as the mist 8 from which a mist average diameter becomes 10 micrometers or more and 1000 micrometers or less are provided. Therefore, it becomes possible to spray the mist 8 in a state in which the sterilizing power and / or ozone concentration of the ozone UFB-containing liquid is sufficiently maintained, and sterilize and deodorize a wide range of objects with a small amount of the ozone UFB-containing liquid. It becomes possible to do. Moreover, since the mist production | generation apparatus 20 in this embodiment has the ozone UFB containing liquid production | generation part 24 which produces | generates an ozone UFB containing liquid, since it is not necessary to prepare an ozone UFB containing liquid separately, a mist production | generation apparatus The running cost of 20 can be suppressed.
　なお、図７に示すように、ミスト生成装置２０は、オゾンＵＦＢ含有液生成部２４によって生成されたオゾンＵＦＢ含有液を貯蔵する貯蔵部２１をさらに備えてもよい。図７に示すように、ミスト生成装置２０が貯蔵部２１を備えていると、オゾンＵＦＢ含有液生成部２４で生成されたオゾンＵＦＢ含有液を効率良く利用することができる。一方、図６に示すように、ミスト生成装置２０が貯蔵部２１を備えていない場合、構成部品を少なくすることが可能となるので、製造コストを抑えることができる。 In addition, as shown in FIG. 7, the mist production | generation apparatus 20 may further be provided with the storage part 21 which stores the ozone UFB containing liquid produced | generated by the ozone UFB containing liquid production | generation part 24. FIG. As shown in FIG. 7, when the mist production | generation apparatus 20 is provided with the storage part 21, the ozone UFB containing liquid produced | generated by the ozone UFB containing liquid production | generation part 24 can be utilized efficiently. On the other hand, as shown in FIG. 6, when the mist production | generation apparatus 20 is not provided with the storage part 21, since it becomes possible to reduce a component, manufacturing cost can be held down.
　なお、上記の実施形態１～３では、オゾンガスを含むＵＦＢを含有するオゾンＵＦＢ含有液の主成分が水である場合を説明したが、本発明の実施形態はこれに限定されるものではない。オゾンガスを含むＵＦＢを含有する液体の主成分が、例えば、有機溶媒や種々の油であってもよい。 In Embodiments 1 to 3 described above, the case where the main component of the ozone UFB-containing liquid containing UFB containing ozone gas is water, but the embodiments of the present invention are not limited to this. The main component of the liquid containing UFB containing ozone gas may be, for example, an organic solvent or various oils.
　本発明の実施形態によると、十分な殺菌力および／またはオゾン濃度を有するミストを対象物に噴霧することができるミスト生成装置およびミスト生成方法を提供することができる。 According to the embodiment of the present invention, it is possible to provide a mist generating apparatus and a mist generating method capable of spraying a mist having a sufficient sterilizing power and / or ozone concentration onto an object.
　本発明の実施形態によるミスト生成装置は、殺菌・脱臭装置として好適に用いられる。また、本発明の実施形態によるミスト生成方法は、殺菌・脱臭方法に好適に用いられる。 The mist generating device according to the embodiment of the present invention is suitably used as a sterilizing / deodorizing device. Moreover, the mist production | generation method by embodiment of this invention is used suitably for the sterilization / deodorizing method.
　〔援用の記載〕
　本願は、２０１６年６月３０日に出願された特願２０１６－１２９６６９号に基づく優先権を主張するものであり、この出願の開示内容の全てを本願に援用する。 [Description of support]
This application claims the priority based on Japanese Patent Application No. 2016-129669 for which it applied on June 30, 2016, and uses all the indications of this application for this application.
　１　　殺菌・脱臭システム
　２　　二流体ノズル
　３　　送液ポンプ
　４　　コンプレッサー
　５　　圧力計
　６　　減圧弁
　７　　オゾンＵＦＢ含有液
　７ｕ　　ウルトラファインバブル
　８　　ミスト
　８ｕ　　ウルトラファインバブル
　９　　対象物
　１０　　ミスト生成装置
　１１　　貯蔵部
　１２　　ミスト生成部
　２０　　ミスト生成装置
　２１　　貯蔵部
　２２　　ミスト生成部
　２３　　オゾンガス生成部
　２４　　オゾンＵＦＢ含有液生成部 DESCRIPTION OF SYMBOLS 1 Sterilization / deodorizing system 2 Two-fluid nozzle 3 Liquid feed pump 4 Compressor 5 Pressure gauge 6 Pressure reducing valve 7 OUF-containing liquid 7 u Ultra fine bubble 8 Mist 8 u Ultra fine bubble 9 Object 10 Mist generating device 11 Storage unit 12 Mist generating unit 20 Mist Generation Device 21 Storage Unit 22 Mist Generation Unit 23 Ozone Gas Generation Unit 24 Ozone UFB Containing Liquid Generation Unit

Claims (6)

  1. 　オゾンガスを含むウルトラファインバブルを含有する液体であるオゾンＵＦＢ含有液を貯蔵する貯蔵部と、
    　前記貯蔵部に貯蔵されている前記オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧するミスト生成部と、を備えるミスト生成装置。     A storage unit for storing an ozone UFB-containing liquid that is a liquid containing an ultrafine bubble containing ozone gas;
    A mist production | generation apparatus provided with the mist production | generation part which sprays the said ozone UFB containing liquid stored in the said storage part as mist with a mist average diameter of 10 micrometers or more and 1000 micrometers or less.
  2. 　オゾンガスを生成するオゾンガス生成部と、
    　前記オゾンガス生成部によって生成された前記オゾンガスを含むウルトラファインバブルを含有する液体であるオゾンＵＦＢ含有液を生成するオゾンＵＦＢ含有液生成部と、
    　前記オゾンＵＦＢ含有液生成部によって生成された前記オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧するミスト生成部と、を備えるミスト生成装置。     An ozone gas generating unit for generating ozone gas;
    An ozone UFB-containing liquid generating unit that generates an ozone UFB-containing liquid that is a liquid containing ultrafine bubbles containing the ozone gas generated by the ozone gas generating unit;
    A mist production | generation apparatus provided with the mist production | generation part which sprays the said ozone UFB containing liquid produced | generated by the said ozone UFB containing liquid production | generation part as mist with a mist average diameter of 10 micrometers or more and 1000 micrometers or less.
  3. 　前記オゾンＵＦＢ含有液生成部によって生成された前記オゾンＵＦＢ含有液を貯蔵する貯蔵部をさらに備える請求項２に記載のミスト生成装置。 The mist production | generation apparatus of Claim 2 further equipped with the storage part which stores the said ozone UFB containing liquid produced | generated by the said ozone UFB containing liquid production | generation part.
  4. 　液体からミストを生成するミスト生成方法であって、
    　オゾンガスを含むウルトラファインバブルを含有する液体であるオゾンＵＦＢ含有液を用意するステップ（Ａ）と、
    　前記オゾンＵＦＢ含有液を、ミスト平均径が１０μｍ以上１０００μｍ以下のミストとして噴霧するステップ（Ｂ）と、を包含するミスト生成方法。     A mist generating method for generating mist from a liquid,
    Step (A) of preparing an ozone UFB-containing liquid that is a liquid containing ultrafine bubbles containing ozone gas;
    Spraying the ozone UFB-containing liquid as a mist having a mean mist diameter of 10 μm or more and 1000 μm or less (B).
  5. 　前記ステップ（Ａ）は、
    　前記オゾンガスを生成するステップ（Ａ－１）と、
    　前記ステップ（Ａ－１）において生成された前記オゾンガスを用いて前記オゾンＵＦＢ含有液を生成するステップ（Ａ－２）と、を含む請求項４に記載のミスト生成方法。     The step (A)
    Generating the ozone gas (A-1);
    The mist generation method according to claim 4, further comprising: (A-2) generating the ozone UFB-containing liquid using the ozone gas generated in the step (A-1).
  6. 　請求項４または５に記載のミスト生成方法を用いて対象物に前記ミストを噴霧することによって、前記対象物の殺菌および／または脱臭を行う殺菌・脱臭方法。 A sterilization / deodorization method for sterilizing and / or deodorizing the object by spraying the mist on the object using the mist generating method according to claim 4 or 5.
PCT/JP2017/022377 2016-06-30 2017-06-16 Mist-generating device, mist-generating method, and sterilization/deodorization method WO2018003557A1 (en)

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EP3950605A4 (en) * 2019-03-29 2023-03-08 IHI Corporation Ozone water manufacturing device, ozone water manufacturing method, ozone water, ozone water processing device, and evaluation method

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JP2007167053A (en) * 2005-02-21 2007-07-05 Eiji Matsumura Method for disinfecting livestock and apparatus for disinfecting livestock
JP2007275089A (en) * 2006-04-03 2007-10-25 Naga International Kk Long-term sustainable ozone water, and environment sterilization and deodorizing/clarification method using long-term sustainable ozone water
JP2014526969A (en) * 2011-08-25 2014-10-09 エレクトロリティック、オゾン、インコーポレイテッド Device that generates ozonated water and sends it out

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JP2007167053A (en) * 2005-02-21 2007-07-05 Eiji Matsumura Method for disinfecting livestock and apparatus for disinfecting livestock
JP2007275089A (en) * 2006-04-03 2007-10-25 Naga International Kk Long-term sustainable ozone water, and environment sterilization and deodorizing/clarification method using long-term sustainable ozone water
JP2014526969A (en) * 2011-08-25 2014-10-09 エレクトロリティック、オゾン、インコーポレイテッド Device that generates ozonated water and sends it out

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3950605A4 (en) * 2019-03-29 2023-03-08 IHI Corporation Ozone water manufacturing device, ozone water manufacturing method, ozone water, ozone water processing device, and evaluation method

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