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WO2025182405A1 - Dispositif de génération de bulles et procédé de génération de bulles - Google Patents

Dispositif de génération de bulles et procédé de génération de bulles

Info

Publication number
WO2025182405A1
WO2025182405A1 PCT/JP2025/002695 JP2025002695W WO2025182405A1 WO 2025182405 A1 WO2025182405 A1 WO 2025182405A1 JP 2025002695 W JP2025002695 W JP 2025002695W WO 2025182405 A1 WO2025182405 A1 WO 2025182405A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade member
water
bubbles
interface
generated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/002695
Other languages
English (en)
Japanese (ja)
Inventor
英生 菅谷
勝利 福田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2025182405A1 publication Critical patent/WO2025182405A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2373—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
    • B01F23/2375—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm for obtaining bubbles with a size below 1 µm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/44—Mixers with shaking, oscillating, or vibrating mechanisms with stirrers performing an oscillatory, vibratory or shaking movement
    • B01F31/441—Mixers with shaking, oscillating, or vibrating mechanisms with stirrers performing an oscillatory, vibratory or shaking movement performing a rectilinear reciprocating movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/80—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations
    • B01F31/85—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations with a vibrating element inside the receptacle

Definitions

  • This disclosure relates to a bubble generating device and a bubble generating method.
  • Patent Document 1 discloses a method for producing nanobubbles by applying physical stimuli to microbubbles contained in a liquid, such as electric discharge, ultrasonic irradiation, compression, expansion, or vortex flow, thereby rapidly shrinking the microbubbles.
  • the above-mentioned conventional nanobubble production method has the following problems. That is, in the nanobubble production method disclosed in the above publication, for example, microbubbles are generated simultaneously with the generation of nanobubbles, and it is particularly difficult to efficiently and stably generate nanobubbles in a small amount of water.
  • An object of the present disclosure is to provide a bubble generator and a bubble generating method that can generate nanobubbles efficiently and stably.
  • the bubble generator according to the present disclosure is a bubble generator that generates nanobubbles in water, and includes a blade member that is used with at least a portion of it immersed in the water interface, a vibration imparting unit that vibrates the blade member in a direction approximately parallel to the water interface, and a control unit that controls the vibration imparting unit to vibrate the blade member at a predetermined frequency.
  • the bubble generator according to the present disclosure can generate nanobubbles efficiently and stably.
  • FIG. 1A and 1B are diagrams illustrating the configuration of bubbles produced by a bubble generating device according to an embodiment of the present disclosure.
  • 2 is a schematic diagram showing the configuration of a bubble generating device that generates the bubbles shown in FIG. 1 .
  • FIG. 3 is a conceptual diagram showing a state in which a blade member included in the bubble generating device of FIG. 2 is vibrated (reciprocated) in a direction perpendicular to the recess.
  • 3 is a conceptual diagram showing a state in which a blade member included in the bubble generating device of FIG. 2 is vibrated (reciprocated) in a direction parallel to the recess.
  • 3B is a graph showing the relationship between the elapsed time and the phase of bubbles generated by vibrating the blade member in the direction of FIG. 3A.
  • 3B is a graph showing the relationship between the number (percentage) of bubbles generated by vibrating the blade member in the direction of FIG. 3A and the DLS scattering intensity (diameter).
  • 3C is a graph showing the relationship between the elapsed time and the phase of bubbles generated by vibrating the blade member in the direction of FIG. 3B.
  • 3B is a graph showing the relationship between the number (percentage) of bubbles generated by vibrating the blade member in the direction of FIG. 3B and the DLS scattering intensity (diameter).
  • 3B is a graph showing the relationship between the elapsed time and the phase of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 240 Hz.
  • 3B is a graph showing the relationship between the elapsed time and the phase of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 240 Hz.
  • 8B is a graph showing the relationship between the size (diameter) and the number (percentage) of bubbles corresponding to FIG. 8A generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 240 Hz.
  • FIG. 8B is a graph showing the relationship between the size (diameter) and the number (percentage) of bubbles corresponding to FIG. 8A generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 240 Hz.
  • 3B is a graph showing the distribution of zeta potential of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 207 Hz.
  • 3B is a graph showing the distribution of zeta potential of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 207 Hz.
  • 8B is a graph showing the relationship between the size (diameter) and the number (percentage) of bubbles corresponding to FIG. 8A generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 207 Hz.
  • 8B is a graph showing the relationship between the size (diameter) and the number (percentage) of bubbles corresponding to FIG. 8A generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 207 Hz.
  • 3 is a conceptual diagram showing the blade member of FIG. 2 being vibrated in the direction of the arrow while being submerged almost entirely below the water interface.
  • 12B is a conceptual diagram showing that the blade member is vibrated in the direction of the arrow in a state where the concave portion of the blade member in FIG. 2 is immersed below the water interface by raising the position of the blade member from that in FIG. 12A.
  • 12C is a conceptual diagram showing that the blade member is vibrated in the direction of the arrow in a state where the position of the blade member is raised higher than in FIG. 12B and part of the concave portion of the blade member in FIG. 2 is exposed above the water interface.
  • 12C is a conceptual diagram showing the blade member being vibrated in the direction of the arrow with a part of the concave portion of the blade member in FIG. 2 immersed below the water interface.
  • 12B is a graph showing the relationship between the number (percentage) of bubbles generated by vibrating the blade member as shown in FIG. 12A and the DLS scattering intensity (diameter).
  • 12C is a graph showing the relationship between the number (percentage) of bubbles generated by vibrating the blade member as shown in FIG. 12B and the DLS scattering intensity (diameter).
  • 12D is a graph showing the relationship between the number (percentage) of bubbles generated by vibrating the blade member as shown in FIG. 12C and the DLS scattering intensity (diameter).
  • 12D is a graph showing the relationship between the number (percentage) of bubbles generated by vibrating the blade member as shown in FIG. 12D and the DLS scattering intensity (diameter).
  • 3B is a graph showing the distribution of zeta potential of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 170 Hz.
  • 3B is a graph showing the distribution of zeta potential of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 170 Hz.
  • 16A and 16B are graphs showing the relationship between the number (percentage) of bubbles corresponding to FIG. 16A and the DLS scattering intensity (diameter) generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG.
  • 16A and 16B are graphs showing the relationship between the number (percentage) of bubbles corresponding to FIG. 16A and the DLS scattering intensity (diameter) generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 170 Hz.
  • 3B is a graph showing the distribution of zeta potential of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 160 Hz.
  • 3B is a graph showing the distribution of zeta potential of bubbles generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 160 Hz.
  • 18A and 18B are graphs showing the relationship between the number (percentage) of bubbles corresponding to FIG. 18A and the DLS scattering intensity (diameter) generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 160 Hz.
  • 18A and 18B are graphs showing the relationship between the number (percentage) of bubbles corresponding to FIG. 18A and the DLS scattering intensity (diameter) generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 160 Hz.
  • 3B is a graph showing the distribution of zeta potential of bubbles generated by vibrating the blade member of FIG. 2 in the direction shown in FIG.
  • 3A at a frequency of 4 Hz or less.
  • 3B is a graph showing the relationship between the number (percentage) of bubbles generated and the DLS scattering intensity (diameter) when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A at a frequency of 4 Hz or less.
  • 3 is a conceptual diagram showing the configuration of a blade member (with two blades) vibrated in a predetermined direction by the bubble generator of FIG. 2 .
  • 3 is a conceptual diagram showing the configuration of a blade member (number of blades: 4) vibrated in a predetermined direction by the bubble generator of FIG. 2 .
  • FIG. 3 is a conceptual diagram showing the configuration of a blade member (number of blades: 7) vibrated in a predetermined direction by the bubble generating device of FIG. 2.
  • 21B is a graph showing the bubble generation efficiency when the blade members having different numbers of blades shown in FIGS. 21A, 21B, and 21C are vibrated in directions parallel or perpendicular to the blade direction.
  • 21B is a graph showing the zeta potential of bubbles generated when the blade members having different numbers of blades shown in FIGS. 21A, 21B, and 21C are vibrated in directions parallel or perpendicular to the blade direction.
  • 3 is a graph showing changes in the zeta potential of bubbles generated by changing the amount of water in which the blade member of FIG. 2 is immersed.
  • FIG. 25 is a graph showing the change in bubble generation efficiency in FIG. 24 .
  • 3B is a graph showing that bubbles having a positive zeta potential are generated when the blade member of FIG. 2 is vibrated in the direction shown in FIG. 3A.
  • 27 is a graph showing the relationship between the number (percentage) of bubbles in FIG. 26 and the DLS scattering intensity (diameter).
  • Schematic diagram showing the interface of ultrapure water in a container Schematic diagram showing the interface of nanobubble water placed in a container.
  • 27 is a graph showing the relationship between the number (percentage) of bubbles in FIG. 26 and the DLS scattering intensity (diameter).
  • Bubbles 10 produced by the bubble generator 20 are nanobubbles having a diameter of 1 ⁇ m or less (e.g., 10 to 1000 nm), as shown in Fig. 1.
  • the bubbles 10 go through the processes of "rising,””contracting,” and “collapse” in water, disappearing within a few hours to a few weeks, and producing an effect according to their intended use, such as cleaning, sterilization, or deodorization.
  • Bubbles with a diameter of 1 ⁇ m or less have better cleaning power and longer lifespan than larger diameter microbubbles (eg, 10 ⁇ m or less in diameter).
  • the bubble water (liquid) containing the bubbles 10 can be, for example, distilled water, ultrapure water, etc.
  • the liquid containing the bubbles 10 can also be an aqueous liquid including an aqueous solution that satisfies the ionic product of water.
  • the diameter of the bubble 10 is calculated using the Stokes-Einstein equation below.
  • the diffusion coefficient D is determined by analyzing the autocorrelation function.
  • D H is the hydrodynamic diameter
  • D is the diffusion coefficient
  • k is the Boltzmann constant
  • T is the temperature (K)
  • ⁇ is the viscosity
  • DLS Dynamic light scattering
  • Dynamic light scattering involves irradiating particles undergoing Brownian motion with a laser beam and detecting scattered light signals at a certain angle. The scattered light is analyzed as fluctuations in light intensity or frequency corresponding to the particle diameter, and frequency analysis is performed in the frequency range of 1 Hz to 100 kHz.
  • other methods for measuring bubble behavior include particle trajectory analysis, laser diffraction/scattering, electrical detection zone analysis, resonance mass measurement, and dynamic image analysis.
  • the zeta potential of the bubble 10 can also be measured, for example, by electrophoresis.
  • electrophoresis when an electric field is applied to charged particles suspended in an electrolyte, the charged particles move at a constant speed toward an electrode with a polarity opposite to the surface charge, and the zeta potential of the bubble can be measured by applying the following Henry's equation.
  • the mobility of the charged particles is determined by the Doppler shift.
  • Bubble generator 20 (where U E is electrophoretic mobility, z is zeta potential, ⁇ is dielectric constant, ⁇ is viscosity, and F(ka) is Henry's constant).
  • the bubble generator 20 according to this embodiment is, for example, a device that produces electrically charged bubbles contained in water, and mainly generates nanobubbles having a diameter of 1 ⁇ m or less (for example, 10 to 1000 nm) in water.
  • the bubble generator 20 includes a blade member 21 that vibrates in a predetermined direction while immersed in water W1 (e.g., distilled water, ultrapure water, etc.) contained in a container C1, a vibration imparting unit 22 that vibrates (moves back and forth) the blade member 21 in the predetermined direction, and a control unit 23 that controls the vibration imparting unit 22.
  • the blade member 21 is made of, for example, aluminum, and is a block-shaped member including comb-tooth tip portions, and has a plurality of recesses 21a, as shown in Fig. 2.
  • When vibration is applied to the blade member 21 in the vicinity of the interface WF of the water W1 in the direction of the arrow (the left-right direction in the figure) that is substantially parallel to the interface WF, nanobubbles are generated in the water W1.
  • the recesses 21a are parts of the blade member 21 that are used while immersed in water W1, and a plurality of recesses 21a are provided along the interface WF in the position when in use (see FIG. 2).
  • vibration is mainly applied to the blade member 21 when a portion of the recesses 21a is above the interface WF between the water W1 and the air. That is, when the application of vibration starts, the blade member 21 is vibrated by the vibration applying unit 22 in a state where a part of the recess 21a is above the interface WF.
  • vibration is applied to the blade member 21 in a state where the tops of the multiple recesses 21 a are above the interface WF, and the tops of the recesses 21 a become air intakes while vibrating within the water W1, thereby enabling the desired nanobubbles to be generated efficiently.
  • three recesses 21a are provided in the blade member 21, but the number of recesses 21a may be more than three or may be two or less.
  • the vibration applying unit 22 is, for example, a linear motor connected to the blade member 21, and vibrates the blade member 21 at a predetermined frequency (for example, 100 to 300 Hz). As shown in FIG. 2, the vibration applying unit 22 vibrates the blade member 21 in a direction substantially parallel to the interface WF while a portion of the blade member 21 is immersed in water W1. As shown in FIG. 2, the control unit 23 is connected to the vibration applying unit 22, and controls the vibration applying unit 22 so as to vibrate the blade member 21 at a predetermined frequency (for example, 100 to 300 Hz).
  • the direction in which the blade member 21 is vibrated by the vibration imparting unit 22 can be considered to be a direction that is approximately parallel to the interface WF and approximately perpendicular to the recess 21 a, as shown in Figure 3A, or a direction that is approximately parallel to the interface WF and approximately parallel to the recess 21 a, as shown in Figure 3B.
  • the upper part of the recess 21a acts as an air intake near the interface WF of the water W1, stirring the water W1 and efficiently generating bubbles in the water W1.
  • the generated bubbles 10 have a negative zeta potential of ⁇ 26.97 mV, the average of the results of three experiments, as shown in FIG. 4, the horizontal axis represents the elapsed time (s) after a voltage was applied to the electrode, and the vertical axis represents the mobility (phase (rad)) of the bubbles 10 moving by electrophoresis in the bubble water.
  • the graph in FIG. 4 also shows data from three consecutive measurements of the behavior of the bubbles 10.
  • FIG. 5 shows data on backscattering (bubble diameter and number (%)) immediately after bubbles 10 are generated by vibrating blade member 21 in the direction shown in FIG. 3A. Therefore, it can be seen that the bubbles 10 having a negative zeta potential shown in FIG. 4 have a number concentration of 10 9 per cc and a diameter of about 50 to 200 nm, as shown in FIG.
  • the three lines in the graph of Fig. 5 represent the results of three consecutive measurements, and the horizontal axis of the graph in Fig. 5 represents the diameter of the observed particles (bubbles), and the vertical axis represents the number (%) of the particles.
  • FIG. 7 shows data on backscattering (bubble diameter and number (%)) immediately after bubbles 10 are generated by vibrating blade member 21 in the direction shown in FIG. 3B.
  • the bubbles 10 having a negative zeta potential shown in FIG. 6 have a diameter of about 20 to 100 nm, which is about half the diameter of the results shown in FIG. 5, as shown in FIG. That is, whether the direction in which the blade member 21 was vibrated was approximately perpendicular to the recess 21a shown in Figure 3A or parallel to the recess 21a shown in Figure 3B, the generation of bubbles 10 of approximately 50 to 200 nm and 20 to 100 nm was confirmed in both cases, although there was a difference in the number concentration.
  • the diameter of the generated bubbles 10 is in the range of 30 to 400 nm, as shown in FIGS. 9A and 9B.
  • bubble water containing many bubbles 10 having a diameter of 30 to 40 nm may exhibit high viscosity due to changes in its interface WF, as shown in FIG. 28B, compared to the ultrapure water shown in FIG. 28A.
  • the diameter of the generated bubbles 10 is in the range of 30 to 400 nm, as shown in FIGS. 11A and 11B. From the above, it was found that when a small amount (e.g., 10 ml) of water W1 is placed in container C1 and vibrations at a frequency of approximately 207 to 240 Hz are applied to blade member 21 along a direction approximately perpendicular to recess 21a, bubbles 10 having a diameter of approximately 30 to 400 nm are generated in both cases.
  • a small amount e.g. 10 ml
  • the DLS scattering intensity was approximately 800 on average when the frequency was 240 Hz, and approximately 320 on average when the frequency was 204 Hz. Therefore, it was found that a higher frequency, under the same water volume and generation time conditions, resulted in a higher zeta potential and an advantageous DLS scattering intensity (number concentration).
  • the experimental results when the blade member 21 was vibrated in the direction shown in FIG. 3A for 30 seconds in 3 ml of water at frequencies of 160 Hz and 170 Hz will be described with reference to FIGS. 16A to 19B.
  • the blade member 21 was immersed in the water W1 (20 ml) until the entire recess 21a was below the interface WF (Figure 12A), until the top of the recess 21a was near the interface WF ( Figure 12B), until the top of the recess 21a was above the interface WF ( Figure 12C), and until only a portion of the recess 21a was below the interface WF ( Figure 12D).
  • the blade member 21 was then vibrated in the direction shown in Figure 3A at a predetermined frequency (216 Hz) for 30 seconds.
  • the average results of three experiments were a zeta potential of -14.77 mV and a DLS scattering intensity of 64.03, as shown in Figure 13A, and bubbles 10 having diameters of 35 to 300 nm were generated at a concentration of 25 to 35%.
  • the average results of three experiments were a zeta potential of -17.78 mV and a DLS scattering intensity of 52.20, as shown in Figure 13B, and bubbles 10 having diameters of 50 to 300 nm were generated at a concentration of 25 to 30%.
  • the average results of three experiments were a zeta potential of -14.41 mV and a DLS scattering intensity of 66.70, as shown in Figure 14A, and bubbles 10 having diameters of 60 to 350 nm were generated at a concentration of 20 to 35%.
  • the average results of three experiments were a zeta potential of -16.87 mV and a DLS scattering intensity of 59.07, as shown in Figure 14B, and bubbles 10 having diameters of 50 to 400 nm were generated at a concentration of around 30%.
  • nanobubbles of about 50 to 300 nm were generated in all cases, and it can be seen that the diameter of the generated bubbles can be adjusted to some extent by changing the position of the recess 21a of the blade member 21 relative to the interface WF. Therefore, by changing the immersion position of the interface WF of the blade member 21 in the immersion direction into the water W1, it is possible to control the generation ratio of nanobubbles and microbubbles with different diameters.
  • the average value of the DLS scattering intensity is smaller than 30, which is the lower limit of detection, and therefore it is clear that almost no nanobubbles are generated.
  • the bubble generator 20 of this embodiment it is important not to immerse the entire blade member 21 in the interface of the water W1, and it is preferable that at least a portion of the blade member 21 is positioned above the interface position of the water W1.
  • the bubble generator 20 of this embodiment generates nanobubbles according to the flowchart shown in FIG. That is, in step S11, the blade member 21 is set so that a part of the blade member 21 (the recess 21a) is immersed in the interface WF of the water W1 (setting step).
  • the bubble generator 20 of this embodiment is a device that generates nanobubbles in water, and includes a blade member 21 that is used with at least a portion immersed in the interface WF of the water W1, a vibration imparting unit 22 that vibrates the blade member 21 in a direction approximately parallel to the interface WF of the water W1, and a control unit 23 that controls the vibration imparting unit 22 to vibrate the blade member 21 at a predetermined frequency.
  • nanobubbles having a diameter of approximately 100 nm can be efficiently generated in a small amount of water W1, for example.
  • nanobubbles can be generated efficiently and stably, or the size of the nanobubbles to be generated can be changed.
  • Figures 22 and 23 show experimental data obtained by vibrating blade members 121a, 121b, and 121c perpendicular ( ⁇ ) or parallel ( ⁇ ) to the blade orientation using blade member 121a with two blades as shown in Figure 21A, blade member 121b with four blades as shown in Figure 21B, and blade member 121c with seven blades as shown in Figure 21C.
  • the derived count rate on the vertical axis of the graph shown in Figure 22 is the number of photon pulses per second detected by the light-receiving optical system using the photon correlation method, and is proportional to the detected scattered light intensity, with the unit being cps (counts per second).
  • the bubble generator 20 and bubble generation method of this embodiment can generate nanobubble water containing radicals (O 2 ⁇ , OH, etc.).
  • the number of recesses is not limited to a plurality, and may be one.
  • bubbles may be generated by vibrating a blade member in a direction oblique to the recess.
  • C In the above embodiment, an example in which bubbles having a negative zeta potential are generated has been described, but the present invention is not limited to this.
  • it may be configured to generate bubbles with a positive zeta potential.
  • a blade member 21 having four blades is vibrated in the direction shown in Figure 3A, the generated bubble 10 has a positive zeta potential immediately after the vibration begins, as shown in Figure 26.
  • FIG. 27 it can be seen that the size of the bubbles 10 is concentrated in the range of 100 to 300 nm.
  • bubbles 10 having such a positive zeta potential may be caused, for example, by using an aluminum blade member 21 without cleaning it.
  • D In the above embodiment, an example has been described in which bubbles 10 are generated in the water W1 using one blade member 21 having a plurality of recesses 21a that is used while immersed in the water W1.
  • the present disclosure is not limited to this.
  • the blade member used while immersed in water may be a plurality of blade members instead of one.
  • the blade member used while immersed in water may be a plurality of blade members instead of one.
  • aluminum has been described as an example of the material of the blade member 21.
  • the present disclosure is not limited to this.
  • the blade member may be formed using a resin material.
  • the amount of water W1 in which the blade member 21 is immersed is 3 ml to 30 ml, but the present disclosure is not limited to this.
  • the amount of water in which the blade member is immersed to generate nanobubbles is determined by the positional relationship between the water interface and the blade member, and is not limited to the total amount of water, and may be less or more than the amount described above.
  • the bubble generator according to Technology 1 is A bubble generator that generates nanobubbles in water, a blade member that is used in a state where at least a part of the blade member is immersed in the water interface; a vibration applying unit that vibrates the blade member in a direction substantially parallel to the water interface; a control unit that controls the vibration applying unit so as to vibrate the blade member at a predetermined frequency; It is equipped with:
  • the bubble generator according to Technology 2 is the bubble generator according to Technology 1,
  • the blade member is vibrated by the vibration imparting unit near the water interface.
  • the bubble generator according to Technology 3 is the bubble generator according to Technology 1 or 2,
  • the blade member has a recess formed along a direction intersecting the interface.
  • the bubble generator according to Technology 4 is the bubble generator according to Technology 3,
  • the blade member is vibrated by the vibration applying unit in a state where a part of the recess is above the interface.
  • the bubble generator according to Technology 5 is the bubble generator according to Technology 3,
  • the blade member has a plurality of the recesses along the interface.
  • a bubble generator according to technology 6 is a bubble generator according to any one of technology 1 to 5, The immersion position of the interface of the blade member relative to the immersion direction in the water is changed to control the generation ratio of the nanobubbles and the microbubbles.
  • a bubble generator according to Technology 7 is a bubble generator according to any one of Technology 1 to Technology 6, A plurality of the blade members are provided.
  • a bubble generator according to technology 8 is a bubble generator according to any one of technology 1 to 7,
  • the vibration applying unit is a linear motor.
  • Bubble 20 Bubble generator 21 Blade member 21a Recess 22 Vibration imparting unit 23 Control unit C1 Container W1 Water (nanobubble water) WF interface

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)

Abstract

Un dispositif de génération de bulles (20) génère des nanobulles dans l'eau, et comprend : un élément de pale (21) qui est utilisé dans un état dans lequel au moins une section de celui-ci est immergée dans l'interface (WF) de l'eau (W1) ; une unité de transmission de vibrations (22) qui amène l'élément de pale (21) à vibrer dans une direction sensiblement parallèle à l'interface (WF) de l'eau (W1) ; et une unité de commande (23) qui commande l'unité de transmission de vibrations (22) de façon à amener l'élément de pale (21) à vibrer à une fréquence prescrite.
PCT/JP2025/002695 2024-02-29 2025-01-29 Dispositif de génération de bulles et procédé de génération de bulles Pending WO2025182405A1 (fr)

Applications Claiming Priority (2)

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JP2024030169 2024-02-29
JP2024-030169 2024-02-29

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WO2025182405A1 true WO2025182405A1 (fr) 2025-09-04

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179638U (fr) * 1984-10-29 1986-05-27
JPH03232524A (ja) * 1990-02-07 1991-10-16 Toshiba Corp 撹拌装置
JP2007232522A (ja) * 2006-02-28 2007-09-13 Olympus Corp 攪拌装置と分析装置
WO2010150629A1 (fr) * 2009-06-22 2010-12-29 パナソニック電工株式会社 Procédé de génération d'un brouillard et de microbulles à l'aide d'ondes acoustiques superficielles et dispositif pour générer un brouillard et des microbulles
JP2015199037A (ja) * 2014-04-08 2015-11-12 株式会社東芝 攪拌装置及び自動分析装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179638U (fr) * 1984-10-29 1986-05-27
JPH03232524A (ja) * 1990-02-07 1991-10-16 Toshiba Corp 撹拌装置
JP2007232522A (ja) * 2006-02-28 2007-09-13 Olympus Corp 攪拌装置と分析装置
WO2010150629A1 (fr) * 2009-06-22 2010-12-29 パナソニック電工株式会社 Procédé de génération d'un brouillard et de microbulles à l'aide d'ondes acoustiques superficielles et dispositif pour générer un brouillard et des microbulles
JP2015199037A (ja) * 2014-04-08 2015-11-12 株式会社東芝 攪拌装置及び自動分析装置

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