JP2018065095A - Bubble-containing liquid manufacturing apparatus and bubble-containing liquid manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a fine bubble-containing liquid, which contains bubbles having fine and uniform particle diameters with a high concentration, with good efficiency.SOLUTION: A bubble-containing liquid manufacturing apparatus 100 comprises: a bubble generating part 110 which generates a first bubble in a liquid, and supplies a first bubble-containing liquid which contains the first bubble; a bubble collapsing part 120 which is connected to the bubble generating part 110, passes the first bubble-containing liquid supplied from the bubble generating part 110, irradiates said passing first bubble-containing liquid with ultrasonic wave, collapses the bubble in the first bubble-containing liquid and generates a second bubble, and supplies a second bubble-containing liquid which contains the second bubble; and a storage part 130 which is connected to the bubble collapsing part 120, and stores the second bubble-containing liquid supplied from the bubble collapsing part 120. The bubble collapsing part 120 comprises a passage in which the bubble-containing liquid passes, and plural ultrasonic vibrators 120 which radiate ultrasonic waves toward an inner side from an outer side of the passage from different directions.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a bubble-containing liquid production apparatus and a bubble-containing liquid production method for producing an ultrafine bubble-containing liquid, and more specifically, ultrafine bubbles containing ultrafine bubbles generated by crushing fine bubbles with ultrasonic waves. The present invention relates to a bubble-containing liquid manufacturing apparatus and a bubble-containing liquid manufacturing method for manufacturing a containing liquid.

  In recent years, liquids containing bubbles with micro-order particle sizes (micro bubbles) and bubbles with nano-order particle sizes (nano bubbles) have attracted attention in the liquids, medical, agriculture, fisheries, food and drink Application to various fields such as aquaculture is planned. Some of these fine bubbles are also referred to as fine bubbles, and some bubbles have a characteristic that the bubble-containing liquid becomes clouded by scattering visible light.

  Such bubbles that scatter visible light have a particle size of several tens of microns, but when the particle size becomes finer and becomes a bubble of 200 nanometers or less, the particle size of the bubbles becomes smaller than the wavelength of visible light. Therefore, there is a feature that the bubble-containing liquid becomes transparent. Such a bubble having a particle size of 200 nanometers or less is also referred to as an ultra fine bubble. It is known that this ultra fine bubble stays in the liquid for several months and the bubbles are charged.

  As one of the manufacturing methods of the ultrafine bubble-containing liquid containing ultrafine bubbles such as these, by irradiating the fine bubble-containing liquid with ultrasonic waves, the fine bubbles are crushed and the ultrafine bubbles with a finer particle size are obtained. There is a technique for generating bubbles. For example, in the method for producing nanobubble-containing water described in Patent Document 1, microbubble-containing water is produced in a bubble generation unit, and the microbubble-containing water is temporarily stored in a storage unit, and only bubbles having a desired particle size are obtained. The contained microbubble-containing liquid is taken out from the reservoir, and the microbubbles are crushed by irradiating the extracted microbubble-containing liquid with ultrasonic waves, thereby producing nanobubbles, thereby producing the nanobubble-containing liquid.

  By the way, in the ultrafine bubble-containing liquid, normally, bubbles having various particle diameters are mixed. However, it is known that when the particle size is not uniform (homogeneous), the amount of charge held and the zeta potential are different in each bubble, and an aggregating action occurs between the bubbles. Therefore, when trying to increase the concentration of bubbles, there is a problem that bubbles are aggregated in a bubble-containing liquid with a nonuniform particle size, and it is very difficult to produce a liquid containing high-concentration ultrafine bubbles. Met.

  In order to produce such a high-concentration ultrafine bubble-containing liquid, a nanobubble production apparatus described in Citation 2 has been developed. In this nanobubble manufacturing apparatus, the microbubble-containing liquid is supplied to the liquid tank, the supplied bubble-containing liquid is irradiated with ultrasonic waves, and the nanobubbles are generated by crushing the microbubbles to produce the nanobubble-containing liquid. . In this nanobubble production apparatus, in particular, by utilizing the feature that the nanobubbles concentrate downward in the liquid tank, an ultrasonic crushing field is formed in the middle of the nanobubble production apparatus, so that a highly concentrated ultrafine bubble-containing liquid having a uniform particle size can be obtained. Manufactured.

Japanese Patent Laid-Open No. 2014-200762 Japanese Patent Laying-Open No. 2015-186871

  However, the method for producing nanobubble-containing water described in Cited Document 1 is intended to continuously generate nanobubbles by simply ultrasonically crushing microbubbles with an ultrasonic wave generator provided in the passage. It is not intended to produce nanobubbles having a uniform particle size. That is, the method for producing a nanobubble-containing liquid in Patent Document 1 irradiates ultrasonic waves from one direction to a bubble-containing liquid flowing in a passage, and does not intend to form an ultrasonic crushing field where ultrasonic waves concentrate. In other words, there is a problem that bubbles having a uniform particle size cannot be generated. In addition, by irradiating ultrasonic waves from one direction, a part of the bubble-containing liquid stays and the flow of the bubble-containing liquid is hindered, so that the bubble-containing liquid containing fine bubbles cannot be efficiently supplied. There was also a problem.

  On the other hand, in the nanobubble production apparatus described in the cited document 2, it is possible to produce an ultrafine bubble-containing liquid having a uniform particle diameter by forming an ultrasonic crushing field. However, if the capacity of the tank is increased, ultrasonic crushing is performed. There is a problem that it becomes difficult to control a plurality of ultrasonic transducers in order to form a field. In addition, since the bubble-containing liquid with a high concentration is produced due to the concentration of bubbles, it takes a certain time until the required number of bubbles are generated in the tank, and the bubble-containing liquid with a desired concentration is supplied. There was also a problem that time delay occurred.

  An object of the present invention is to solve these problems and to efficiently produce an ultrafine bubble-containing liquid containing a high concentration of bubbles having a fine and uniform particle size.

  The bubble-containing liquid manufacturing apparatus according to the present invention generates a first bubble in the liquid and supplies a first bubble-containing liquid containing the first bubble, and is connected to the bubble generating unit. And passing the first bubble-containing liquid supplied from the bubble generating unit, irradiating ultrasonic waves to the first bubble-containing liquid passing therethrough, and crushing the bubbles of the first bubble-containing liquid A bubble crushing unit that generates a second bubble and supplies a second bubble-containing liquid containing the second bubble, and a second bubble connected to the bubble crushing unit and supplied from the bubble crushing unit And a storage unit for storing the contained liquid. The bubble crushing section includes a passage through which the bubble-containing liquid passes and a plurality of ultrasonic transducers that radiate ultrasonic waves from different directions from the outside of the passage toward the inside in the radial direction.

  In this bubble-containing liquid manufacturing apparatus, when the first bubble-containing liquid supplied from the bubble generating unit passes through the bubble crushing unit, the first bubble is crushed by being irradiated with ultrasonic waves, and the particles A second bubble with a finer diameter is generated. In this bubble crushing portion, since ultrasonic waves are irradiated from a plurality of ultrasonic transducers to the passage through which the bubble-containing liquid flows, an ultrasonic crushing field where ultrasonic waves concentrate in the passage is formed, and the particle size is reduced. Uniform ultrafine bubbles are generated. At this time, since the ultrasonic waves are irradiated from different directions, the retention of the bubble-containing liquid is suppressed as compared with the case where the ultrasonic waves are irradiated from one direction. Then, the bubble-containing liquid containing the ultrafine bubbles is continuously stored in the storage portion, and the bubbles of the ultrafine bubbles are concentrated downward to increase the concentration.

  Therefore, in the bubble crushing portion, an ultrasonic crushing field is formed in the passage of the bubble-containing liquid, uniform ultrafine bubbles are generated, and the bubble-containing liquid is continuously stored in the storage portion without aggregation of the ultrafine bubbles. Since it is supplied efficiently, the bubble-containing liquid is highly concentrated in a short time in the reservoir.

  That is, according to the present invention, by separating the bubble crushing portion and the storage portion, uniform fine bubbles are generated by the ultrasonic crushing field in the passage and are continuously supplied to the storage portion. Is increased in concentration. In particular, by generating ultrasonic waves from different directions, the crushing portion can efficiently supply ultrafine bubbles having a uniform particle diameter to the storage portion without inhibiting the flow of the bubble-containing liquid. Moreover, since ultrafine bubbles are efficiently and continuously supplied in the reservoir, the concentration of the bubble-containing liquid can be increased in a short time.

  The plurality of ultrasonic transducers may form at least one transducer group, and the ultrasonic transducers of each transducer group may irradiate ultrasonic waves toward the center of the passage. By doing so, since the ultrasonic wave is irradiated toward the center of the passage, it is possible to surely inhibit the flow of the bubble-containing liquid while forming the ultrasonic crushing field. Accordingly, the ultrafine bubbles are efficiently supplied without being accumulated in the passage.

  Further, the plurality of ultrasonic transducers may irradiate ultrasonic waves from the opposing direction toward the center of the passage. By doing so, a uniform crushing field can be formed over the entire area of the passage, and bubbles having a uniform particle diameter can be reliably generated.

  Each ultrasonic transducer may be capable of adjusting the oscillation frequency. By doing so, the desired bubble-containing liquid can be easily generated. That is, since the bubble particle size and quantity are affected by the oscillation frequency of the ultrasonic transducer, the bubble generation can be easily controlled by making it adjustable. The ultrasonic vibrator irradiates the passage through which the bubble-containing liquid flows with ultrasonic waves. It can be manufactured easily. In particular, the effect of adjusting the ultrasonic vibrator according to the flow rate of the bubble-containing liquid flowing through the passage is great.

  Each ultrasonic transducer may be capable of adjusting the output. By adjusting the output, the bubbles can be crushed with an output that does not obstruct the flow to the maximum while forming the ultrasonic crushing field uniformly. Thereby, a bubble containing liquid can be manufactured stably.

  The crushing portion includes an exterior body that covers the periphery of the passage, and is filled with a propagation liquid capable of propagating ultrasonic waves between the passage and the exterior body, and the ultrasonic transducer is disposed outside the exterior body. It may be attached. By doing so, it is possible to stably produce the bubble-containing liquid by the propagation liquid reliably propagating the ultrasonic wave to the passage, although the attachment of the ultrasonic vibrator becomes easy.

  The passage is formed of a resin material, and the exterior body is formed of a metal material. By doing so, since the ultrasonic vibrator can be easily attached to the exterior body even though it can be used for a beverage or the like as a bubble-containing liquid flowing in the passage, it is possible to manufacture the bubble collapse portion. It becomes easy.

  The bubble crushing portion may be arranged such that the passage is in a horizontal direction, and the propagation liquid may be introduced from the lower side of the exterior body and led out from the upper side, and may be steadily led out. By doing so, air does not enter the flow path of the propagation liquid, and the propagation liquid can reliably propagate the ultrasonic wave. In addition, the propagation liquid exhibits the effect of the cooling water and suppresses heat generation due to the ultrasonic collapse. In addition, it is possible to prevent the ability of the bubble collapse portion from being reduced by heat.

  The reservoir is connected to the bubble generator, a part of the bottom side of the bubble-containing liquid stored in the reservoir is supplied to the outside, and a part of the center of the bubble-containing liquid stored in the reservoir May be supplied to the bubble generator. By doing so, the bubble-containing liquid containing bubbles having a relatively large particle size will circulate through the bubble generating unit, the bubble crushing unit, and the storing unit, and the bubble content efficiently and uniformly has a high particle concentration. A liquid is produced.

  A loop formed by the bubble generation unit, the bubble crushing unit, and the storage unit may be a sealed structure that is cut off from the atmosphere, and the storage unit may be capable of adjusting an internal pressure. By doing so, a completely sealed structure bubble generation system without gas contact with the atmosphere can be constructed, so that the bubble-containing liquid production apparatus is safe regardless of the type of gas to be bubbled and the type of stock solution.

  The bubble generation unit may be modularized so as to be replaceable. By doing so, since the amount of the first bubble-containing liquid generated per time can be adjusted, the desired bubble-containing liquid can be easily combined with the output control of the ultrasonic vibrator in the bubble collapse portion. Can be manufactured.

  Another bubble-containing liquid manufacturing apparatus according to the present invention allows the first bubble-containing liquid contained in the liquid to pass through the first bubble-containing liquid, irradiates the first bubble-containing liquid passing therethrough with ultrasonic waves, A bubble crushing unit is provided that crushes a bubble of one bubble-containing liquid to generate a second bubble, and supplies a second bubble-containing liquid containing the second bubble. The bubble crushing section includes a passage through which the bubble-containing liquid passes and a plurality of ultrasonic transducers that radiate ultrasonic waves from different directions from the outside of the passage toward the inside in the radial direction.

  In this bubble-containing liquid manufacturing apparatus, when the first bubble-containing liquid passes through the bubble crushing portion, the first bubble is crushed by being irradiated with ultrasonic waves, and the second particle size is finer. Bubbles are generated. In this bubble crushing portion, since ultrasonic waves are irradiated from a plurality of ultrasonic transducers to the passage through which the bubble-containing liquid flows, an ultrasonic crushing field where ultrasonic waves concentrate in the passage is formed, and the particle size is reduced. Uniform ultrafine bubbles are generated. At this time, since the ultrasonic waves are irradiated from different directions, the retention of the bubble-containing liquid is suppressed as compared with the case where the ultrasonic waves are irradiated from one direction.

  Therefore, in the bubble crushing portion, an ultrasonic crushing field is formed in the passage of the bubble-containing liquid, ultrafine bubbles having a uniform particle size are generated, and the bubble-containing liquid is continuously formed without aggregation of the ultrafine bubbles. Supplied. That is, according to the present invention, the bubble crushing part can efficiently supply fine bubbles having a uniform particle size without inhibiting the flow of the contained liquid by generating ultrasonic waves from different directions.

  The bubble-containing liquid manufacturing method according to the present invention includes a bubble generating unit that generates a bubble-containing liquid, and a bubble-containing liquid that is connected to and passes through the bubble-containing liquid that is connected to the bubble generating unit. A bubble-containing liquid comprising: a bubble crushing part that irradiates ultrasonic waves to crush bubbles of the bubble-containing liquid; and a storage part that is connected to the bubble crushing part and stores the bubble-containing liquid supplied from the bubble crushing part Use production equipment. In the bubble-containing liquid manufacturing method, the bubble generating unit generates a first bubble-containing liquid containing a first bubble in the liquid, and the bubble crushing part exceeds the first bubble-containing liquid. Irradiating a sound wave, crushing the first bubble to generate a second bubble-containing liquid containing the second bubble, and storing the second bubble-containing liquid.

  In this bubble-containing liquid manufacturing method, when the first bubble-containing liquid supplied from the bubble generating part passes through the bubble crushing part, the first bubble is crushed by being irradiated with ultrasonic waves, and more A fine second bubble is generated. In this bubble crushing part, since ultrasonic waves are irradiated from a plurality of ultrasonic vibrators to the passage through which the bubble-containing liquid flows, an ultrasonic crushing field where ultrasonic waves concentrate is formed in the passage, and a uniform ultrasonic wave is formed. Fine bubbles are generated. At this time, since the ultrasonic waves are irradiated from different directions, the retention of the bubble-containing liquid is suppressed as compared with the case where the ultrasonic waves are irradiated from one direction. And the bubble containing liquid containing the ultrafine bubble is stored by the storage part, concentrates below, and makes it high concentration.

  Therefore, in the bubble crushing portion, an ultrasonic crushing field is formed in the passage of the bubble-containing liquid, and ultrafine bubbles having a uniform particle size are generated, and the bubble-containing liquid is continuously stored without aggregation of the ultrafine bubbles. Therefore, the bubble-containing liquid is highly concentrated in the reservoir in a short time.

  That is, according to the method for producing a bubble-containing liquid according to the present invention, the crushing and the storage are separately performed, so that uniform fine bubbles due to the ultrasonic crushing field are generated by the crushing, and the ultrafine bubbles are highly concentrated by the storage. It becomes. In particular, the crushing generates ultrasonic waves from different directions, so that uniform fine bubbles can be efficiently supplied to the reservoir without impeding the flow of the contained liquid. Moreover, since ultrafine bubbles are supplied efficiently and continuously in the storage, the concentration of the bubble-containing liquid is increased in a short time.

  ADVANTAGE OF THE INVENTION According to this invention, the ultrafine bubble containing liquid which contains a bubble with a fine particle diameter in high concentration can be manufactured efficiently.

It is a figure which shows the external appearance of the bubble containing liquid manufacturing apparatus of this invention. It is a figure which shows the functional block of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the bubble generator of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the foaming part of the bubble generator shown in FIG. It is a figure which shows the bubble collapse part of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the side cross section of the bubble collapse part shown in FIG. It is a figure which shows the storage part of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the flow of the bubble containing liquid manufacturing method using the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the functional block of the bubble containing liquid manufacturing apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the functional block of the bubble containing liquid manufacturing apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the modification of the bubble crushing part of the bubble containing liquid manufacturing apparatus of this invention.

  <First embodiment>

  The bubble containing liquid manufacturing apparatus 100 which concerns on the 1st Embodiment of this invention is demonstrated referring FIGS. 1-7. The bubble-containing liquid manufacturing apparatus 100 manufactures a bubble-containing liquid that contains bubbles in the liquid. The liquid includes beverages such as drinking water, milk, fruit juice and liquor, and also includes pure water, distilled water, industrial water and the like in addition to beverages. Moreover, the gas to be bubbled includes various gases such as ozone, oxygen, nitrogen, hydrogen, and carbon dioxide. That is, the liquid and the gas to be bubbled are appropriately selected according to the use of the bubble-containing liquid manufacturing apparatus 100. In the present embodiment, the bubble-containing liquid manufacturing apparatus 100 manufactures an ozone bubble-containing liquid in which pure water is applied to the liquid and ozone is applied to the gas to be bubbled.

  FIG. 1 shows the appearance of the bubble-containing liquid manufacturing apparatus 100. (A) shows the front view of the bubble containing liquid manufacturing apparatus 100, (B) shows the side view of the bubble containing liquid manufacturing apparatus 100. FIG. As shown in FIG. 1, the bubble-containing liquid manufacturing apparatus 100 includes a configuration described later in a casing formed in a cubic box shape. The bubble-containing liquid manufacturing apparatus 100 includes an operation panel 101, and the user can arbitrarily operate the bubble-containing liquid manufacturing apparatus 100 via the operation panel 101. Furthermore, the bubble-containing liquid manufacturing apparatus 100 is provided with wheels 102 and is movable.

  In the present embodiment, each component of bubble-containing liquid manufacturing apparatus 100 is housed in one housing and is taken into another system as the housing. However, the bubble-containing liquid manufacturing apparatus 100 may be incorporated into another system for each configuration and function as a bubble-containing liquid manufacturing apparatus in the system. For example, by using each configuration of the bubble-containing liquid manufacturing apparatus 100 in the beverage manufacturing system and making the beverage a bubble-containing liquid while manufacturing the beverage, the beverage is sterilized. The bubble-containing liquid manufacturing apparatus 100 may constitute a part of the system.

  FIG. 2 shows an outline of a functional block diagram of the bubble-containing liquid manufacturing apparatus 100. As shown in FIG. 2, the bubble-containing liquid manufacturing apparatus 100 according to the present embodiment mainly generates a first bubble in the liquid and uses the first bubble-containing liquid containing the first bubble. The first bubble generating unit 110 to be supplied and the first bubble-containing liquid connected to the bubble generating unit 110 to pass the first bubble-containing liquid supplied from the bubble generating unit 110 and irradiate the first bubble-containing liquid passing therethrough with ultrasonic waves Then, the bubble of the first bubble-containing liquid is crushed to generate a second bubble, and the second bubble-containing liquid containing the second bubble is supplied. And a storage unit 130 that stores the second bubble-containing liquid supplied from the bubble crushing unit 120. The bubble generation unit 110, the bubble crushing unit 120, and the storage unit 130 are connected to each other and form a circulation cycle (loop) for circulating the bubble-containing liquid.

  In addition to the above configuration, the bubble-containing liquid manufacturing apparatus 100 is connected to the storage unit 130 and is connected to the stock solution introduction unit 140 that introduces liquid, and the gas introduction unit 150 that is connected to the bubble generation unit 110 and introduces gas. And a flow path connecting each section, a valve provided at each position of the flow path, and a control section 160 that controls a series of operations of the bubble-containing liquid manufacturing apparatus 100.

  Furthermore, in the bubble-containing liquid manufacturing apparatus 100, a take-out unit 170 that takes out the produced bubble-containing liquid to the outside of the apparatus and a discharge unit 180 that discharges the liquid that is no longer needed are connected to the storage unit 130. In addition, a cooling unit 190 that supplies cooling water to the gas introduction unit 150, the bubble crushing unit 120, and the storage unit 130 is connected.

  The control unit 160 is electrically connected to the control panel and is operated by an operator. Moreover, the control part 160 controls each valve | bulb, switch, etc. which were provided in each place based on the detection information etc. of sensors, such as a water area sensor provided in each place in the bubble containing liquid manufacturing apparatus 100, and a temperature sensor.

  In the present embodiment, the stock solution introduction unit 140 is for introducing pure water into the bubble-containing liquid production apparatus 100 as an example of a liquid. The stock solution introducing unit 140 is connected to a pure water supply source (not shown) via a valve. The liquid introduced from the stock solution introduction unit 140 once introduces the liquid into the storage unit 130 and is supplied to the gas-liquid mixer 111 of the bubble generation unit 110 via the recursive channel 103 described later. However, depending on the type of bubble-containing liquid produced by the bubble-containing liquid production apparatus 100, the stock solution introducing unit 140 may be beverages other than pure water, beverages such as milk, fruit juice, liquor, or distilled water, Other liquids such as irrigation water may be introduced.

  In the present embodiment, the gas introduction unit 150 is for introducing ozone into the bubble generation unit 110 as an example of a gas to be bubbled. The gas introduction unit 150 is a well-known ozone generator that supplies ozone, and is connected to a bubble gas supply source via a pressure gauge, a flow meter, and a check valve. However, the gas introduction unit 150 may introduce other gases such as oxygen, nitrogen, hydrogen, ammonia, carbon dioxide other than ozone, depending on the type of bubble-containing liquid produced by the bubble-containing liquid production apparatus 100. For example, when bubbling nitrogen, the gas introduction unit 150 may be connected to the nitrogen tank 131 in order to introduce nitrogen instead of the ozone generator.

  The bubble generation unit 110 is supplied with a gas-liquid mixer 111 that mixes liquid and gas, and a bubble generator 112 that is supplied with the bubble-containing liquid in which the gas is mixed by the gas-liquid mixer 111 and generates a first bubble-containing liquid. And a gas-liquid pump 113 for supplying the bubble-containing liquid from the gas-liquid mixer 111 to the bubble generator 112.

  As the gas-liquid pump 113, a conventionally well-known air-driven positive displacement pump is applied. However, a non-positive displacement pump such as a magnet pump or an axial flow pump may be applied, and other pumps may be applied. Also good.

  The gas-liquid mixer 111 is provided on the upstream side of the gas-liquid pump 113, and is connected to a liquid intake (not shown) connected to a recursive outlet 134 of the storage unit 130 described later and a gas supply path. A gas inlet (not shown). The gas-liquid mixer 111 is supplied with the stock solution once supplied from the stock solution introduction unit 140 to the storage unit 130 or the bubble-containing solution stored in the storage unit 130 via the recursive channel 103.

  In the gas-liquid mixer 111, a liquid channel (not shown) connected to the liquid inlet and a gas channel (not shown) connected to the gas inlet are formed so that the gas is taken in along the liquid flow. The gas is sucked simultaneously with the liquid by using the suction force of the gas-liquid pump 113. As a result, the liquid and the gas are smoothly supplied to the gas-liquid pump 113, and the liquid and the gas are mixed in the gas-liquid pump 113 to generate a bubble-containing liquid. According to such a gas-liquid mixer 113, there is no problem that a large amount of gas is introduced and the gas-liquid pump 113 is idled, and that no gas enters and the generation of bubbles is not quantified. This bubble mixture is supplied to the bubble generator 112.

  The bubble generator collides the swirl part 114 that forms a swirl flow by spirally swirling the bubble-containing liquid supplied from the gas-liquid mixer 111, and the bubbles of the bubble-containing liquid that has formed the swirl flow collide with the protrusion 115a. A protrusion crushing portion 115 to be crushed, a livestock raising portion 116 for retaining the bubble-containing liquid containing the crushed bubbles for a certain period of time, and a foaming portion 117 for foaming the bubble-containing liquid after being retained for a certain period of time to a high concentration Is provided.

  FIG. 3 shows the bubble generator 112, (A) shows a perspective view of the bubble generator 112, and (B) shows a side sectional view of the bubble generator 112. As shown in FIG. 3A, the bubble generator 112 is connected to the first cylindrical portion 112a and the first cylindrical portion 112a, and extends in the same direction as the first cylindrical portion 112a. A second cylindrical portion 112b having a diameter larger than 112a and a third cylindrical portion connected to the second cylindrical portion 112b, extending in the same direction as the second cylindrical portion 112b, and having a smaller diameter than the second cylindrical portion 112b 112c. The bubble generator 112 is substantially vertically extended by the first to third cylindrical portions 112c, and is arranged so that the first cylindrical portion 112a is positioned downward and the third cylindrical portion 112c is positioned upward. The

  As shown in FIG. 3B, the turning portion 114 is provided in the first cylindrical portion 112a and has a turning surface 114a formed in a spiral shape inside the cylinder. The swivel surface 114a spirally extends in the axial direction of the column so as to obtain a swirl flow that rotates in the circumferential direction of the first cylindrical portion 112a and proceeds in the axial direction of the column. Therefore, the swirling unit 114 spirally swirls the bubble-containing liquid supplied from the gas-liquid mixer 111 to form a swirling flow, and supplies the bubble-containing liquid to the protrusion crushing unit 115. The swirling unit 114 can accelerate the flow velocity by forming a swirling flow using the supply pressure of the gas-liquid pump 113.

  The swivel unit 114 desirably has a swivel surface 114a from which at least 1.5 rotations or more can be obtained. However, the swirl unit 114 increases the rotational speed of the swirling flow to increase the flow velocity, but also increases the pressure loss. Therefore, the swirling surface 114a is determined based on the lift capacity of the gas-liquid pump 113 and the required bubble concentration. The optimum rotational speed is determined.

  The protrusion crushing portion 115 is provided in the second cylindrical portion, is formed in a cylindrical shape, and includes a multi-step protrusion 115a along the axial direction on the inner peripheral surface of the cylinder. The protrusions 115a are arranged so that their tips are opposed to each other. Thereby, the protrusion crushing portion 115 is formed with a flow path having a circular cross section, and a plurality of protrusions 115a protrude toward the inside of the circular shape, forming a hollow space where the protrusion 115a does not exist in the center portion. Therefore, the protrusion crushing part 115 is provided downstream of the swivel part 114, and the bubble-containing liquid that has passed through the swivel part 114 is sheared and crushed by the protrusion 115a. As a result, the bubbles of the bubble-containing liquid are crushed by hitting the protrusions 115a and become finer bubbles, and the bubble-containing liquid is improved in bubble concentration by reducing the bubbles.

  The protrusions 115a have at least six steps or more and are alternately arranged at an angle of 36 degrees or more in the longitudinal direction. The bubble-containing liquid accelerated by the swivel member 114 is crushed while hitting the protrusion 115a, and the gas is further refined. Since the pressure loss increases as the number of protrusions 115a increases, the number of protrusions 115a is determined from the lifting capacity of the gas-liquid pump 113 and the required bubble concentration.

  The breeding part 116 is provided in the 2nd cylindrical part 112b, and is the space in the 2nd cylindrical part 112b. The breeding unit 116 retains the bubble-containing liquid whose bubble concentration is improved for a certain period of time by passing through the protrusion crushing unit 115. Thereby, the retained charge amount and the zeta potential in the bubble generated by the shear collapse at the protrusion collapse portion 115 can be made uniform. Therefore, in the livestock raising part 116, the particle size of the bubble of a bubble containing liquid can be arrange | equalized. Moreover, the livestock raising part 116 is connected to the livestock raising pressurizer (not shown), and can pressurize the inside of the livestock raising part 116 to a predetermined pressure (0.8 MPa to 2.0 MPa). Thereby, it has the function which improves a bubble density | concentration by utilizing the pressurization compression effect by surplus gas, and raising the pressure in the stock raising part 116 to a fixed pressure.

  The optimal value of the volume of the livestock raising unit 116 is determined by the type of gas-liquid pump 113 and the supply flow rate. Usually, the range of 1/20 to 1/5 of the supply flow rate is the optimum value. The supply flow of the animal breeding unit 116 becomes the supply flow rate of the bubble generation unit 110, and the bubble-containing liquid at that flow rate is supplied to the bubble crushing unit 120 provided downstream.

  As shown in FIGS. 3B and 4, the foamed portion 117 is provided in the third cylindrical portion 112 c and is generally formed in a columnar shape. A slit hole 117a provided in the center of the circular cross section is provided on the lower surface of the cylinder, and further, a re-pressurizing space 117b in the cylinder continuing to the slit hole 117a and a re-pressurizing space 117b are continuous and tapered. A conical tapered space 117c is formed.

  The slit hole 117a is fed with the bubble-containing liquid temporarily retained in the breeding unit 116. The repressurization space 117b includes an outlet 117d for allowing the liquid to flow out with an opening area smaller than the opening area of the slit hole 117a in order to pressurize the bubble-containing liquid that has passed through the slit hole 117a, and the periphery of the outlet 117d. Moreover, it has the collision wall 117e located in the back surface side of a slit board. In the repressurizing space 117b, the bubble-containing liquid that has flowed in through the slit hole 117a collides with the collision wall and the bubbles are crushed, creating turbulent flow in the space, and a part of the bubble-containing liquid is discharged from the outlet. To the taper space 117c. As a result, the bubble-containing liquid is pressurized again in the repressurization space 117b.

  The tapered space 117c has a tapered surface 117f that diffuses in a conical shape at an angle smaller than, for example, 15 degrees from the outlet 117d. As a result, the liquid that has passed through the slit hole 117a flows in the inclined direction of the tapered surface 117f while being pressurized and is depressurized. More specifically, the pressure in the repressurization space 117b is about 3 MPa, but in the taper space 117c, the pressure is reduced to 1 MPa, and the concentration of the bubble-containing liquid is improved.

  In the bubble generation unit 110, the bubble-containing liquid supplied from the gas-liquid mixer 111 passes through the swivel unit 114, the protrusion crushing unit 115, the animal breeding unit 116, and the foaming unit 117 of the bubble generator 112. To generate a first bubble. Thereby, the bubble production | generation part 110 can supply the 1st bubble containing liquid containing a 1st bubble to the bubble crushing part 120. FIG. In the present embodiment, the bubble generation unit 110 generates microbubbles having a uniform particle size in the micro order as the first bubbles (see JP-A-2015-188671).

  The bubble generation unit 110 of the bubble-containing liquid production apparatus 100 according to the present embodiment has functions of swirling, crushing, animal husbandry, foaming (pressurization and decompression), and an air bellows pump that is a pump with a low head capacity. It is possible to generate fine, uniform, high-concentration microbubbles even with a diaphragm pump, and it is possible to further improve the concentration with a magnet pump or an axial pump. For this reason, the bubble generator which does not choose the kind of gas-liquid pump 113 by these functions is attained.

  The bubble generation unit 110 may have another configuration as long as the first bubble that is crushed by the bubble crushing unit 120 can be generated. For example, a well-known swirling flow type bubble generating device (see Japanese Patent Application Laid-Open No. 2006-116365), a pressure shearing type bubble generating device (see Japanese Patent Application Laid-Open No. 2006-272232), and the like are used as the bubble generator 112. Can be used as However, in order to supply bubbles having a uniform particle size to the bubble crushing unit 120, it is desirable to use the bubble generator 112 according to the present embodiment.

  In addition, the bubble generator 112 of the bubble generation unit 110 includes a swirl unit 114, a protrusion crushing unit 115, a breeding unit 116, and a foaming unit 117. The bubble generator 112 includes a plurality of units so that the amount of liquid passing therethrough is different. Modules may be prepared. You may comprise so that arbitrary one modules can be selected and attached from these several modules. Further, each module may be replaceable.

  FIG. 5 shows the bubble crushing portion 120, (A) shows a side view of the bubble crushing portion 120, and (B) shows a front view of the bubble crushing portion 120. The bubble crushing unit 120 is connected to the bubble generator 112 of the bubble generating unit 110, and a passage 121 that allows the first bubble-containing liquid manufactured by the bubble generating unit 110 to pass therethrough, and an exterior body 122 that covers the periphery of the passage 121. And a two-layer structure having an intermediate space 123 from the passage 121 and the exterior body 122. The bubble crushing portion 120 is arranged so that the passage 121 extends in the horizontal direction.

  An ultrasonic transducer 124 is provided in the exterior body 122, and each ultrasonic transducer 124 irradiates ultrasonic waves toward the passage 121. The propagation liquid is filled between the passage 121 and the exterior body 122, and the ultrasonic wave irradiated from the ultrasonic vibrator 124 is propagated into the passage 121 through the propagation liquid and flows inside the passage 121. Ultrasonically crush the bubble-containing liquid.

  The passage 121 is formed of a pipe made of PVC (polyvinyl chloride). Thus, the passage 121 has a circular cross section and extends in a cylindrical shape with the same diameter, thereby forming a uniform flow path. The passage 121 is connected so as to be interposed between the bubble generation unit 110 and the storage unit 130, and the first bubble-containing liquid supplied from the bubble generation unit 110 is filled inside the passage 121 and is stored in the storage unit 130. To be washed away.

  The exterior body 122 is made of stainless steel and includes a side circumferential member 122a extending in a hexagonal column shape having a regular hexagonal cross section, and a pair of disk-shaped planar members 122b sandwiching the side circumferential member 122a from both sides in the extending direction. . Both planar members 122b are fitted with a passage 121 at the center, and the passage 121 is fixed so that the passage 121 extends to the hexagonal center of the side circumferential member 122a. Thus, an intermediate space 123 is formed on the outer side of the passage 121 and the side peripheral member 122a of the exterior body 122, and the outer periphery of the passage 121 and each surface of the hexagonal side peripheral member 122a have the same intermediate space 123 respectively. Forming.

  FIG. 6 is a side cross-sectional view of the bubble crushing portion 120 taken along the arrow a-a ′ in FIG. 5. As shown in FIG. 6, the bubble crushing portion 120 is filled with a propagation liquid capable of propagating ultrasonic waves in an intermediate space 123 formed by a passage 121 and an exterior body 122. In the present embodiment, the cooling water supplied from the cooling unit 190 is filled as the propagation liquid. The propagation liquid is introduced from the propagation liquid introduction port 122c provided below the planar member 122b of the exterior body 122 in the bubble crushing portion 120 disposed in a state where the passage 121 faces in the horizontal direction, and the planar surface of the exterior body 122 is obtained. It is derived from a propagation liquid outlet 122d provided on the upper side of the member 122b. Thereby, in the intermediate space 123, the propagation liquid is supplied from the left side of the drawing, filled from the lower side to the upper side, and discharged from the upper side. Therefore, the propagation liquid is filled without leaving air in the intermediate space 123.

  The ultrasonic wave irradiated from the ultrasonic vibrator 124 attached to the exterior body 122 is propagated to the passage 121 via the propagation liquid. At this time, if air remains in the intermediate space 123, the propagation rate of the propagation liquid and the air is different, so that the ultrasonic waves do not propagate evenly. Therefore, by leaving no air in the intermediate space 123, the ultrasonic waves can be propagated efficiently and uniformly into the passage 121.

  The propagating liquid is constantly flowing through the intermediate space 123. Thereby, the heat of the bubble crushing part 120 by ultrasonic crushing can be discharged | emitted. The propagating liquid flows in the same direction as the bubble-containing liquid flowing in the passage 121. Thereby, heat can be efficiently discharged. Further, the heat discharge efficiency can be further increased by increasing the flow velocity of the propagation liquid. The flow velocity of the propagation liquid can be achieved, for example, by controlling a pump that sends the propagation liquid to the bubble collapse portion 120. The exterior body 122 is provided with a heat sensor (not shown), and can control the flow velocity of the propagation liquid while observing the heat generation state of the bubble collapse portion 120.

  In the embodiment according to the present invention, the propagation liquid is steadily flowed, but only when the temperature of the bubble crushing portion 120 rises by filling the intermediate space once and stopping the supply of the propagation liquid. You may make it flow a liquid again. Although the propagating liquid propagates ultrasonic waves, loss due to the propagation still occurs, so that the intermediate space 123 is preferably narrow. However, if the propagation space is too narrow, the amount of cooling water (propagation liquid) decreases, and the heat discharge efficiency decreases. However, by allowing the propagation liquid to flow constantly, it is possible to suppress a decrease in heat discharge efficiency, to narrow the intermediate space 123, and to increase the degree of freedom in design of the bubble collapse portion 120. .

  Referring to FIG. 5 again, the exterior body 122 has an ultrasonic transducer 124 attached to each surface of the hexagonal column. The ultrasonic transducers 124 are provided in two stages in the extending direction of the passage 121, the bubble generating unit 110 side being the preceding ultrasonic transducer group, and the storage unit 130 side being the subsequent ultrasonic transducer group. It is said. Each stage of the ultrasonic transducer group is composed of six ultrasonic transducers 124 provided radially from the central axis of the passage 121. The two ultrasonic transducers 124 facing each other constitute a pair of oscillators, and the six ultrasonic transducers 124 constitute three oscillator pairs. Each ultrasonic transducer can be adjusted in frequency and output by the control unit 160. In the present embodiment, the 12 ultrasonic transducers 124 irradiate ultrasonic waves with the same frequency and the same output, respectively.

  Each oscillator pair is provided at the same position in the extending direction of the passage 121 and on a pair of opposing side surfaces of the hexagonal column of the exterior body 122. Here, since the exterior body 122 is made of stainless steel, it reflects ultrasonic waves. Therefore, the ultrasonic wave oscillated from the ultrasonic transducer 124 provided on one surface of the side circumferential member 122a is reflected by the other surface facing the side circumferential member 122a. The reflected ultrasonic wave is superimposed on the ultrasonic wave irradiated from the ultrasonic transducer 124 provided on the other surface (the reflection surface).

  Each of these six ultrasonic transducers 124 irradiates ultrasonic waves toward a central point of the passage 121. Accordingly, each ultrasonic transducer 124 irradiates ultrasonic waves from different positions in different radial directions and radially inward toward the center of the passage. Thereby, it is suppressed that the bubble containing liquid which flows through the channel | path 121 is inhibited from flowing by an ultrasonic wave. In particular, each of the pair of oscillators oscillates an ultrasonic wave from the facing position toward the facing direction. As a result, an ultrasonic crushing field is formed from the center of the passage 121, the first bubble-containing liquid passing through the passage 121 is crushed, and second bubbles having a uniform particle size are generated.

  In the bubble crushing portion 120, ultrasonic waves are irradiated from a plurality of directions, and an ultrasonic crushing field is formed at a place where the ultrasonic waves are concentrated. Therefore, in this embodiment, each ultrasonic transducer group forms an ultrasonic collapse field in the passage 121. Even if all of the first bubbles are not crushed in the ultrasonic crushing field formed by the preceding ultrasonic transducer group, the ultrasonic crushing field formed by the subsequent ultrasonic transducer group remains in the remaining first Therefore, in the bubble crushing part 120 according to the present embodiment, the first bubble can be surely crushed and a uniform second bubble can be generated. In the present embodiment, the bubble crushing unit 120 generates nanobubbles having a uniform nano-order particle size as the second bubbles.

  In the present embodiment, six, that is, even-numbered ultrasonic transducers 124 are provided on the exterior body 122 of the bubble collapse portion 120 in each ultrasonic transducer group. However, the ultrasonic transducers 124 may be provided with an odd number of ultrasonic transducers 124. In this case, a plurality of pairs of oscillators and one ultrasonic transducer 124 are provided.

  FIG. 7 shows an external view of the storage unit 130, (A) shows a plan view of the storage unit 130, (B) shows a front view of the storage unit 130, and (C) shows a side view of the storage unit 130. (D) shows a bottom view of the reservoir 130. As shown in FIG. 7, the storage unit 130 mainly includes a cylindrical tank 131, and a stock solution introduction port 132 connected to the stock solution introduction unit 140 and a bubble-containing solution introduction port 133 connected to the bubble crushing unit 120. A recirculation outlet 134 connected to the recursive flow path 103, a bubble-containing liquid outlet 135 connected to the extraction section 170, and a discharge outlet 136 connected to the discharge section 180.

  The stock solution introduction port 132 is mainly composed of a cylindrical pipe, extends from the upper surface of the tank 131 to the top surface in the tank 131, and supplies the stock solution from the stock solution introduction unit 140 to the top surface position of the tank 131. The bubble-containing liquid inlet 133 is mainly composed of a cylindrical pipe, extends from the upper surface of the tank 131 to the middle position in the tank 131, and supplies the second bubble-containing liquid to the middle position of the tank 131.

  The recursion outlet 134 is mainly made of a cylindrical pipe, extends from the lower surface of the tank 131 to the vicinity of the lower 1/4 position in the tank 131, and contains bubbles at the lower 1/4 position of the tank 131. The liquid is led out to the recursive flow path 103 and the bubble-containing liquid is recirculated to the gas-liquid mixer 111. The bubble-containing liquid outlet 135 is mainly composed of a cylindrical pipe, extends from the bottom surface of the tank 131 to the lower stage in the tank 131, and takes out the bubble-containing liquid from the bottom of the tank 131. The discharge port 136 mainly includes a cylindrical pipe, extends from the bottom surface of the tank 131 to the lower stage in the tank 131, and discharges the bubble-containing liquid from the bottom of the tank 131.

  The tank 131 is made of PVC as a material and has a completely sealed structure. Thereby, even if the trace gas generated at the time of the ultrasonic crushing of the bubble crushing part 120 flows into the storage part 130, it does not come into contact with the atmosphere. Therefore, in this Embodiment, even if it is a case where an ozone nanobubble containing liquid is produced | generated, the human body danger by ozone leak can be prevented. Further, since the tank 131 has a sealed structure, the pressure in the storage unit 130 can be controlled. The bubble-containing liquid outlet 135 is provided with a decompression bubble (not shown).

  In the present embodiment, the tank 131 is made of PVC. However, the tank 131 may be made of a resin material such as a fluorine-based resin such as PVDF or quartz. In the case of a resin material, the upper part of the tank 131 has a completely sealed structure by resin welding or adhesion. In the case of quartz, the tank 131 has a sealed structure through a sealing material such as PTFE or Viton.

  Since the reservoir 130 has a sealed structure, it is possible to prevent human danger due to ozone leakage when ozone nanobubbles are generated, hydrogen nanobubbles can prevent explosion hazard due to contact between hydrogen and oxygen, and even in response to organic synthesis reaction by bubbles, Since there is no mixing of gas components in the air, a stable organic synthesis reaction can be obtained.

  In bubble-containing liquid manufacturing apparatus 100 according to the present embodiment, bubble crushing section 120 and storage section 130 are separated. Thereby, a fixed amount of bubble-containing liquid with a uniform particle diameter can be continuously supplied without being affected by the capacity of the storage unit 130. Moreover, since the 2nd bubble with a uniform particle diameter is produced | generated by the ultrasonic crushing field in the bubble crushing part 120, and it stores in the storage part 130, it is also suppressed that a bubble aggregates in the storage part 130. FIG. . In other words, since ultrafine bubbles with different particle sizes are aggregated by storage, bubbles having ultrafine particle sizes generated by conventional ultrasonic crushing are not uniform in particle size. However, according to the bubble-containing liquid manufacturing apparatus 100 according to the present embodiment, bubbles having a uniform particle size are generated and can be stored without agglomeration.

  The positions of the stock solution inlet 132, the bubble-containing liquid inlet 133, the recursive outlet 134, and the good bubble-containing liquid outlet 135 provided in the tank 131 can be changed as appropriate. Further, other inlets and outlets may be provided in the tank 131.

  Next, the manufacturing method of the bubble containing liquid using the bubble containing liquid manufacturing apparatus 100 is demonstrated with reference to FIG.

  The bubble-containing liquid manufacturing method according to the present invention supplies liquid to the bubble-containing liquid manufacturing apparatus 100 (step 1), supplies gas to the bubble-containing liquid manufacturing apparatus 100 (step 2), and supplies liquid and gas. Generating a bubble-containing liquid by mixing (step 3), producing a first bubble-containing liquid from the bubble-containing liquid (step 4), irradiating the first bubble-containing liquid with ultrasonic waves, Crush the bubble to generate a second bubble (step 5), store the second bubble-containing liquid (step 6), and recurse the stored bubble-containing liquid to the bubble generating unit 110 (step) 7) including taking out the stored bubble-containing liquid to the outside (step 8).

  In step 1, first, liquid is supplied from the stock solution introduction unit 140 to the storage unit 130. Specifically, the valve provided in the stock solution introduction unit 140 is opened to supply the stock solution to the storage unit 130. At this time, the stock solution is continuously supplied until the tank 131 of the storage unit 130 is filled with a predetermined amount of liquid. Next, the stock solution is supplied to the gas-liquid mixer 111 through the recursive channel 103. Specifically, the recursive valve provided in the recursive flow path 103 is opened, and the stock solution stored up to the lower 1/4 position in the tank 131 by the suction of the gas-liquid pump 113 is stored in the gas-liquid mixer 111. Introduced into the liquid intake.

  In step 2, first, gas is supplied from the gas supply unit to the gas-liquid mixer 111. This step is performed in parallel with the previous step 1. Specifically, a valve provided in the gas introduction unit 150 is opened to supply gas to the gas-liquid mixer 111.

  In step 3, a bubble-containing liquid is first manufactured. Specifically, the gas-liquid pump 113 is operated to cause the gas-liquid mixer 111 to suck the stock solution and the gas. At this time, the stock solution is supplied to the gas-liquid mixer 111 in step 1, and in parallel with this, the gas is supplied to the gas-liquid mixture in step 2, and a bubble-containing liquid is generated. Next, the produced bubble-containing liquid is supplied to the bubble generator 112. Specifically, the gas-liquid pump 113 discharges the bubble mixture.

  In step 4, first, a first bubble-containing liquid is produced from the bubble-containing liquid. Specifically, the bubble-containing liquid is introduced into the swirling unit 114 to form a swirling flow, is crushed by the protrusion crushing unit 115, is temporarily retained by the breeding unit 116, and is depressurized by the foaming unit 117. Next, the bubble-containing liquid that has passed through the foaming part 117 is supplied to the bubble crushing part 120. Specifically, the animal husbandry part 116 is pressurized by the animal husbandry pressurizing part, and the bubble-containing liquid is supplied to the bubble crushing part 120 through the foaming part 117 at a predetermined pressure.

  In step 5, first, the propagation liquid flows into the intermediate space 123. Specifically, the propagation liquid is constantly flowed in a state where the intermediate space is filled. The propagation liquid can be supplied regardless of the flow of the bubble-containing liquid. That is, the propagating liquid can be flowed or stopped before the bubble-containing liquid passes through the passage 121 or during the passage.

  Next, the first bubble-containing liquid passes through the passage 121. Specifically, the first bubble-containing liquid passes in a state where the passage 121 is filled. At the same time, the first bubble-containing liquid is irradiated with ultrasonic waves. Specifically, an ultrasonic crushing field where ultrasonic waves concentrate inside the passage 121 is formed, and the first bubble is crushed to generate the second bubble. Next, the bubble-containing liquid that has passed through the passage 121 is supplied to the reservoir 130.

  In step 6, first, the second bubble-containing liquid is introduced into the reservoir 130 via the bubble-containing liquid introduction port 133. The bubble-containing liquid introduction port extends to the middle position of the tank 131, and the second bubble-containing liquid is introduced to the middle position of the tank 131. The introduced bubble-containing liquid mixes with the liquid already stored, and the bubbles diffuse in the liquid.

  Due to the diffusion of the bubbles, an NB region having a nano-order particle size, which is dominated by so-called nano bubbles, is formed at the bottom of the tank 131, and an MN region in which nano bubbles and micro bubbles are mixed is formed above the NB region. Furthermore, an MB region in which the presence of microbubbles is dominant is formed on the upper side. In each region, the position in the tank 131 varies depending on the amount of liquid stored.

  In Step 7, first, the bubble-containing liquid stored in the storage unit is returned to the gas-liquid mixer 111. Specifically, the valve provided in the recursive flow path is opened, and the stored bubble-containing liquid is introduced into the liquid inlet of the bubble generation unit 110 by the suction of the gas-liquid pump 113. Since the recursion outlet 134 extends to the vicinity of the lower 1/4 position in the tank 131, the bubble-containing liquid in the MN region or MB region is recurred. The recursion of the bubble-containing liquid is continuously performed.

  In step 8, the bubble-containing liquid stored in the storage unit 130 is taken out. Specifically, the valve provided in the extraction unit 180 is opened, and the bubble-containing liquid on the bottom side of the tank 131 is extracted to the outside. Since the NB region is formed at the bottom of the tank 131, the bubble-containing liquid in the NB region is taken out. Finally, the bubble-containing liquid manufacturing apparatus 100 discharges the bubble-containing liquid from the discharge port 136 and ends the operation.

  In the present embodiment, each of the ultrasonic transducers 124 of the ultrasonic crushing unit 120 has always been operated with a constant output. For example, the bubble concentration of the bubble-containing liquid stored in the storage unit The frequency and output may be adjusted according to the above.

  <Second Embodiment>

  Next, the bubble containing liquid manufacturing apparatus 200 which concerns on the 2nd Embodiment of this invention is demonstrated with reference to FIG. The bubble-containing liquid manufacturing apparatus 200 according to the present embodiment is mainly characterized by including two bubble crushing portions 220, and the other configuration is the same as that of the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment. It is the same. Therefore, in the following description, only the characteristic part of the bubble-containing liquid manufacturing apparatus 200 according to the second embodiment will be described, and the configuration similar to that of the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment will be described. Will not be described.

  The bubble-containing liquid manufacturing apparatus 200 includes two bubble crushing parts 220. Bubble crushing unit 220 is connected in parallel to storage unit 230 and bubble generation unit 210. Each of the two bubble crushing parts 220 has the same capability as the bubble crushing part 120 of the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment.

  Therefore, the bubble generation unit 210 can supply twice the amount of the first bubble-containing liquid as compared with the bubble generation unit 110, and the first bubble-containing liquid is supplied to the two bubble crushing units 220. Divide and supply. As a result, the two bubble crushing units 220 of the bubble-containing liquid manufacturing apparatus 200 supply twice the amount of the second bubble-containing liquid to the storage unit 230.

  Thus, by providing a plurality of bubble crushing portions 220, it is possible to increase the production amount of the bubble-containing liquid per unit time. Alternatively, by providing a plurality of bubble crushing portions 220, the passage of each bubble crushing portion 220 can be reduced. When the passage is small, an ultrasonic crushing field can be accurately formed, and a liquid containing ultrafine bubbles having a uniform particle diameter can be efficiently produced.

  In the present embodiment, one bubble generation unit 210 is connected to two bubble crushing units. However, a bubble generation unit is provided for each of a plurality of bubble crushing units 220, and each bubble generation unit is set to 1 You may connect to a bubble collapse part by the one-to-one relationship.

  <Third embodiment>

  Next, a bubble-containing liquid production apparatus 300 according to a third embodiment of the present invention will be described with reference to FIG. The bubble-containing liquid manufacturing apparatus 300 according to the present embodiment is mainly characterized by supplying a bubble-containing liquid directly to the outside without including a storage unit, and the other configurations are related to the first embodiment. The same as the bubble-containing liquid manufacturing apparatus 100. Therefore, in the following description, only the characteristic part of the bubble-containing liquid manufacturing apparatus 300 according to the third embodiment will be described, and the same configuration as the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment will be described. Description is omitted.

  The bubble-containing liquid manufacturing apparatus 100 does not include a storage unit, and the bubble crushing unit 320 is directly connected to the extraction unit 370. In addition, the stock solution introducing unit 340 is directly connected to the gas-liquid mixer 311 of the bubble generating unit 310. As a result, the first bubble-containing liquid produced by the bubble generating unit 310 is ultrasonically crushed by the bubble crushing part 320 without forming a circulation cycle of the bubble-containing liquid, and the second bubble-containing liquid is bubble-collapsed. It is taken out directly from the unit 320.

  <Modification>

  A modification of the bubble crushing portion 120 of the present invention will be described with reference to FIG.

  FIG. 11A shows a first modification of the bubble collapse portion 120. In the bubble crushing portion 120A according to the first modification, the side circumferential member of the exterior body 122A is formed in a regular octagonal columnar shape, and the ultrasonic vibrator 124 is provided on each surface (Modification 1). In the first modification, the eight ultrasonic transducers 124 are provided at the same position in the axial direction (on the same cross section) to form one ultrasonic transducer group. Each ultrasonic transducer 124 emits ultrasonic waves with the same output and the same frequency, and an ultrasonic crushing field is formed in the center of the passage 121.

  FIG. 11B shows a second modification of the bubble collapse portion 120. In the bubble crushing portion 120B according to the second modified example, the side circumferential member of the exterior body 122B is formed in a regular triangular column shape, and the ultrasonic transducer 124 is provided on each surface (modified example 2). In the second modification, the three ultrasonic transducers 124 are provided at the same position in the axial direction (on the same cross section) to form one ultrasonic transducer group. Each ultrasonic transducer 124 emits ultrasonic waves with the same output and the same frequency, and an ultrasonic crushing field is formed in the center of the passage 121.

  FIG. 11C shows a third modification of the bubble collapse portion 120. In the bubble crushing portion 120C according to the third modified example, the side circumferential member of the exterior body 122 is formed in a regular hexagon, and the ultrasonic transducers 124 are provided on every other six faces of the hexagon (deformation). Example 3). In the third modification, the three ultrasonic transducers 124 are provided at the same position in the axial direction (on the same cross section) to form one ultrasonic transducer group. Each ultrasonic transducer 124 emits ultrasonic waves with the same output and the same frequency, and an ultrasonic crushing field is formed in the center of the passage 121.

  If the exterior body 122 of the bubble crushing part 120 is a regular polygon like these modifications, an ultrasonic crushing field can be formed in the center of the channel | path 121. FIG. The number of ultrasonic transducers 124 can be selected as appropriate. However, the exterior body does not have to be a regular polygon, and the ultrasonic transducers may have other arrangements as long as an ultrasonic crushing field can be formed in the passage.

  As mentioned above, although the example of the specific aspect of this invention was demonstrated by embodiment of this invention, this invention is not limited to the said embodiment.

  The present invention can be used for producing a bubble-containing liquid.

100, 200, 300 Bubble-containing liquid production apparatus 110, 210, 310 Bubble generation unit 120, 220, 320 Bubble crushing unit 121 Passage 122 Exterior body 124 Ultrasonic vibrator 130, 230 Storage unit

  TECHNICAL FIELD The present invention relates to a bubble-containing liquid production apparatus and a bubble-containing liquid production method for producing an ultrafine bubble-containing liquid, and more specifically, ultrafine bubbles containing ultrafine bubbles generated by crushing fine bubbles with ultrasonic waves. The present invention relates to a bubble-containing liquid manufacturing apparatus and a bubble-containing liquid manufacturing method for manufacturing a containing liquid.

  In recent years, liquids containing bubbles with micro-order particle sizes (micro bubbles) and bubbles with nano-order particle sizes (nano bubbles) have attracted attention in the liquids, medical, agriculture, fisheries, food and drink Application to various fields such as aquaculture is planned. Some of these fine bubbles are also referred to as fine bubbles, and some bubbles have a characteristic that the bubble-containing liquid becomes clouded by scattering visible light.

  Such bubbles that scatter visible light have a particle size of several tens of microns, but when the particle size becomes finer and becomes a bubble of 200 nanometers or less, the particle size of the bubbles becomes smaller than the wavelength of visible light. Therefore, there is a feature that the bubble-containing liquid becomes transparent. Such a bubble having a particle size of 200 nanometers or less is also referred to as an ultra fine bubble. It is known that this ultra fine bubble stays in the liquid for several months and the bubbles are charged.

  As one of the manufacturing methods of the ultrafine bubble-containing liquid containing ultrafine bubbles such as these, by irradiating the fine bubble-containing liquid with ultrasonic waves, the fine bubbles are crushed and the ultrafine bubbles with a finer particle size are obtained. There is a technique for generating bubbles. For example, in the method for producing nanobubble-containing water described in Patent Document 1, microbubble-containing water is produced in a bubble generation unit, and the microbubble-containing water is temporarily stored in a storage unit, and only bubbles having a desired particle size are obtained. The contained microbubble-containing liquid is taken out from the reservoir, and the microbubbles are crushed by irradiating the extracted microbubble-containing liquid with ultrasonic waves, thereby producing nanobubbles, thereby producing the nanobubble-containing liquid.

  By the way, in the ultrafine bubble-containing liquid, normally, bubbles having various particle diameters are mixed. However, it is known that when the particle size is not uniform (homogeneous), the amount of charge held and the zeta potential are different in each bubble, and an aggregating action occurs between the bubbles. Therefore, when trying to increase the concentration of bubbles, there is a problem that bubbles are aggregated in a bubble-containing liquid with a nonuniform particle size, and it is very difficult to produce a liquid containing high-concentration ultrafine bubbles. Met.

  In order to produce such a high-concentration ultrafine bubble-containing liquid, a nanobubble production apparatus described in Citation 2 has been developed. In this nanobubble manufacturing apparatus, the microbubble-containing liquid is supplied to the liquid tank, the supplied bubble-containing liquid is irradiated with ultrasonic waves, and the nanobubbles are generated by crushing the microbubbles to produce the nanobubble-containing liquid. . In this nanobubble production apparatus, in particular, by utilizing the feature that the nanobubbles concentrate downward in the liquid tank, an ultrasonic crushing field is formed in the middle of the nanobubble production apparatus, so that a highly concentrated ultrafine bubble-containing liquid having a uniform particle size can be obtained. Manufactured.

Japanese Patent Laid-Open No. 2014-200762 Japanese Patent Laying-Open No. 2015-186871

  However, the method for producing nanobubble-containing water described in Cited Document 1 is intended to continuously generate nanobubbles by simply ultrasonically crushing microbubbles with an ultrasonic wave generator provided in the passage. It is not intended to produce nanobubbles having a uniform particle size. That is, the method for producing a nanobubble-containing liquid in Patent Document 1 irradiates ultrasonic waves from one direction to a bubble-containing liquid flowing in a passage, and does not intend to form an ultrasonic crushing field where ultrasonic waves concentrate. In other words, there is a problem that bubbles having a uniform particle size cannot be generated. In addition, by irradiating ultrasonic waves from one direction, a part of the bubble-containing liquid stays and the flow of the bubble-containing liquid is hindered, so that the bubble-containing liquid containing fine bubbles cannot be efficiently supplied. There was also a problem.

  On the other hand, in the nanobubble production apparatus described in the cited document 2, it is possible to produce an ultrafine bubble-containing liquid having a uniform particle diameter by forming an ultrasonic crushing field. However, if the capacity of the tank is increased, ultrasonic crushing is performed. There is a problem that it becomes difficult to control a plurality of ultrasonic transducers in order to form a field. In addition, since the bubble-containing liquid with a high concentration is produced due to the concentration of bubbles, it takes a certain time until the required number of bubbles are generated in the tank, and the bubble-containing liquid with a desired concentration is supplied. There was also a problem that time delay occurred.

  An object of the present invention is to solve these problems and to efficiently produce an ultrafine bubble-containing liquid containing a high concentration of bubbles having a fine and uniform particle size.

  The bubble-containing liquid manufacturing apparatus according to the present invention generates a first bubble in the liquid and supplies a first bubble-containing liquid containing the first bubble, and is connected to the bubble generating unit. And passing the first bubble-containing liquid supplied from the bubble generating unit, irradiating ultrasonic waves to the first bubble-containing liquid passing therethrough, and crushing the bubbles of the first bubble-containing liquid A bubble crushing unit that generates a second bubble and supplies a second bubble-containing liquid containing the second bubble, and a second bubble connected to the bubble crushing unit and supplied from the bubble crushing unit And a storage unit for storing the contained liquid. The bubble crushing section includes a passage through which the bubble-containing liquid passes and a plurality of ultrasonic transducers that radiate ultrasonic waves from different directions from the outside of the passage toward the inside in the radial direction.

  In this bubble-containing liquid manufacturing apparatus, when the first bubble-containing liquid supplied from the bubble generating unit passes through the bubble crushing unit, the first bubble is crushed by being irradiated with ultrasonic waves, and the particles A second bubble with a finer diameter is generated. In this bubble crushing portion, since ultrasonic waves are irradiated from a plurality of ultrasonic transducers to the passage through which the bubble-containing liquid flows, an ultrasonic crushing field where ultrasonic waves concentrate in the passage is formed, and the particle size is reduced. Uniform ultrafine bubbles are generated. At this time, since the ultrasonic waves are irradiated from different directions, the retention of the bubble-containing liquid is suppressed as compared with the case where the ultrasonic waves are irradiated from one direction. Then, the bubble-containing liquid containing the ultrafine bubbles is continuously stored in the storage portion, and the bubbles of the ultrafine bubbles are concentrated downward to increase the concentration.

  Therefore, in the bubble crushing portion, an ultrasonic crushing field is formed in the passage of the bubble-containing liquid, uniform ultrafine bubbles are generated, and the bubble-containing liquid is continuously stored in the storage portion without aggregation of the ultrafine bubbles. Since it is supplied efficiently, the bubble-containing liquid is highly concentrated in a short time in the reservoir.

  That is, according to the present invention, by separating the bubble crushing portion and the storage portion, uniform fine bubbles are generated by the ultrasonic crushing field in the passage and are continuously supplied to the storage portion. Is increased in concentration. In particular, by generating ultrasonic waves from different directions, the crushing portion can efficiently supply ultrafine bubbles having a uniform particle diameter to the storage portion without inhibiting the flow of the bubble-containing liquid. Moreover, since ultrafine bubbles are efficiently and continuously supplied in the reservoir, the concentration of the bubble-containing liquid can be increased in a short time.

  The plurality of ultrasonic transducers may form at least one transducer group, and the ultrasonic transducers of each transducer group may irradiate ultrasonic waves toward the center of the passage. By doing so, since the ultrasonic wave is irradiated toward the center of the passage, it is possible to surely inhibit the flow of the bubble-containing liquid while forming the ultrasonic crushing field. Accordingly, the ultrafine bubbles are efficiently supplied without being accumulated in the passage.

  Further, the plurality of ultrasonic transducers may irradiate ultrasonic waves from the opposing direction toward the center of the passage. By doing so, a uniform crushing field can be formed over the entire area of the passage, and bubbles having a uniform particle diameter can be reliably generated.

  Each ultrasonic transducer may be capable of adjusting the oscillation frequency. By doing so, the desired bubble-containing liquid can be easily generated. That is, since the bubble particle size and quantity are affected by the oscillation frequency of the ultrasonic transducer, the bubble generation can be easily controlled by making it adjustable. The ultrasonic vibrator irradiates the passage through which the bubble-containing liquid flows with ultrasonic waves. It can be manufactured easily. In particular, the effect of adjusting the ultrasonic vibrator according to the flow rate of the bubble-containing liquid flowing through the passage is great.

  Each ultrasonic transducer may be capable of adjusting the output. By adjusting the output, the bubbles can be crushed with an output that does not obstruct the flow to the maximum while forming the ultrasonic crushing field uniformly. Thereby, a bubble containing liquid can be manufactured stably.

  The crushing portion includes an exterior body that covers the periphery of the passage, and is filled with a propagation liquid capable of propagating ultrasonic waves between the passage and the exterior body, and the ultrasonic transducer is disposed outside the exterior body. It may be attached. By doing so, it is possible to stably produce the bubble-containing liquid by the propagation liquid reliably propagating the ultrasonic wave to the passage, although the attachment of the ultrasonic vibrator becomes easy.

  The passage is formed of a resin material, and the exterior body is formed of a metal material. By doing so, since the ultrasonic vibrator can be easily attached to the exterior body even though it can be used for a beverage or the like as a bubble-containing liquid flowing in the passage, it is possible to manufacture the bubble collapse portion. It becomes easy.

  The bubble crushing portion may be arranged such that the passage is in a horizontal direction, and the propagation liquid may be introduced from the lower side of the exterior body and led out from the upper side, and may be steadily led out. By doing so, air does not enter the flow path of the propagation liquid, and the propagation liquid can reliably propagate the ultrasonic wave. In addition, the propagation liquid exhibits the effect of the cooling water and suppresses heat generation due to the ultrasonic collapse. In addition, it is possible to prevent the ability of the bubble collapse portion from being reduced by heat.

  The reservoir is connected to the bubble generator, a part of the bottom side of the bubble-containing liquid stored in the reservoir is supplied to the outside, and a part of the center of the bubble-containing liquid stored in the reservoir May be supplied to the bubble generator. By doing so, the bubble-containing liquid containing bubbles having a relatively large particle size will circulate through the bubble generating unit, the bubble crushing unit, and the storing unit, and the bubble content efficiently and uniformly has a high particle concentration. A liquid is produced.

  A loop formed by the bubble generation unit, the bubble crushing unit, and the storage unit may be a sealed structure that is cut off from the atmosphere, and the storage unit may be capable of adjusting an internal pressure. By doing so, a completely sealed structure bubble generation system without gas contact with the atmosphere can be constructed, so that the bubble-containing liquid production apparatus is safe regardless of the type of gas to be bubbled and the type of stock solution.

  The bubble generation unit may be modularized so as to be replaceable. By doing so, since the amount of the first bubble-containing liquid generated per time can be adjusted, the desired bubble-containing liquid can be easily combined with the output control of the ultrasonic vibrator in the bubble collapse portion. Can be manufactured.

  Another bubble-containing liquid manufacturing apparatus according to the present invention allows the first bubble-containing liquid contained in the liquid to pass through the first bubble-containing liquid, irradiates the first bubble-containing liquid passing therethrough with ultrasonic waves, A bubble crushing unit is provided that crushes a bubble of one bubble-containing liquid to generate a second bubble, and supplies a second bubble-containing liquid containing the second bubble. The bubble crushing section includes a passage through which the bubble-containing liquid passes and a plurality of ultrasonic transducers that radiate ultrasonic waves from different directions from the outside of the passage toward the inside in the radial direction.

  In this bubble-containing liquid manufacturing apparatus, when the first bubble-containing liquid passes through the bubble crushing portion, the first bubble is crushed by being irradiated with ultrasonic waves, and the second particle size is finer. Bubbles are generated. In this bubble crushing portion, since ultrasonic waves are irradiated from a plurality of ultrasonic transducers to the passage through which the bubble-containing liquid flows, an ultrasonic crushing field where ultrasonic waves concentrate in the passage is formed, and the particle size is reduced. Uniform ultrafine bubbles are generated. At this time, since the ultrasonic waves are irradiated from different directions, the retention of the bubble-containing liquid is suppressed as compared with the case where the ultrasonic waves are irradiated from one direction.

  Therefore, in the bubble crushing portion, an ultrasonic crushing field is formed in the passage of the bubble-containing liquid, ultrafine bubbles having a uniform particle size are generated, and the bubble-containing liquid is continuously formed without aggregation of the ultrafine bubbles. Supplied. That is, according to the present invention, the bubble crushing part can efficiently supply fine bubbles having a uniform particle size without inhibiting the flow of the contained liquid by generating ultrasonic waves from different directions.

  The bubble-containing liquid manufacturing method according to the present invention includes a bubble generating unit that generates a bubble-containing liquid, and a bubble-containing liquid that is connected to and passes through the bubble-containing liquid that is connected to the bubble generating unit. A bubble-containing liquid comprising: a bubble crushing part that irradiates ultrasonic waves to crush bubbles of the bubble-containing liquid; and a storage part that is connected to the bubble crushing part and stores the bubble-containing liquid supplied from the bubble crushing part Use production equipment. In the bubble-containing liquid manufacturing method, the bubble generating unit generates a first bubble-containing liquid containing a first bubble in the liquid, and the bubble crushing part exceeds the first bubble-containing liquid. Irradiating a sound wave, crushing the first bubble to generate a second bubble-containing liquid containing the second bubble, and storing the second bubble-containing liquid.

  In this bubble-containing liquid manufacturing method, when the first bubble-containing liquid supplied from the bubble generating part passes through the bubble crushing part, the first bubble is crushed by being irradiated with ultrasonic waves, and more A fine second bubble is generated. In this bubble crushing part, since ultrasonic waves are irradiated from a plurality of ultrasonic vibrators to the passage through which the bubble-containing liquid flows, an ultrasonic crushing field where ultrasonic waves concentrate is formed in the passage, and a uniform ultrasonic wave is formed. Fine bubbles are generated. At this time, since the ultrasonic waves are irradiated from different directions, the retention of the bubble-containing liquid is suppressed as compared with the case where the ultrasonic waves are irradiated from one direction. And the bubble containing liquid containing the ultrafine bubble is stored by the storage part, concentrates below, and makes it high concentration.

  Therefore, in the bubble crushing portion, an ultrasonic crushing field is formed in the passage of the bubble-containing liquid, and ultrafine bubbles having a uniform particle size are generated, and the bubble-containing liquid is continuously stored without aggregation of the ultrafine bubbles. Therefore, the bubble-containing liquid is highly concentrated in the reservoir in a short time.

  That is, according to the method for producing a bubble-containing liquid according to the present invention, the crushing and the storage are separately performed, so that uniform fine bubbles due to the ultrasonic crushing field are generated by the crushing, and the ultrafine bubbles are highly concentrated by the storage. It becomes. In particular, the crushing generates ultrasonic waves from different directions, so that uniform fine bubbles can be efficiently supplied to the reservoir without impeding the flow of the contained liquid. Moreover, since ultrafine bubbles are supplied efficiently and continuously in the storage, the concentration of the bubble-containing liquid is increased in a short time.

  ADVANTAGE OF THE INVENTION According to this invention, the ultrafine bubble containing liquid which contains a bubble with a fine particle diameter in high concentration can be manufactured efficiently.

It is a figure which shows the external appearance of the bubble containing liquid manufacturing apparatus of this invention. It is a figure which shows the functional block of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the bubble generator of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the foaming part of the bubble generator shown in FIG. It is a figure which shows the bubble collapse part of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the side cross section of the bubble collapse part shown in FIG. It is a figure which shows the storage part of the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the flow of the bubble containing liquid manufacturing method using the bubble containing liquid manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the functional block of the bubble containing liquid manufacturing apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the functional block of the bubble containing liquid manufacturing apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the modification of the bubble crushing part of the bubble containing liquid manufacturing apparatus of this invention.

  <First embodiment>

  The bubble containing liquid manufacturing apparatus 100 which concerns on the 1st Embodiment of this invention is demonstrated referring FIGS. 1-7. The bubble-containing liquid manufacturing apparatus 100 manufactures a bubble-containing liquid that contains bubbles in the liquid. The liquid includes beverages such as drinking water, milk, fruit juice and liquor, and also includes pure water, distilled water, industrial water and the like in addition to beverages. Moreover, the gas to be bubbled includes various gases such as ozone, oxygen, nitrogen, hydrogen, and carbon dioxide. That is, the liquid and the gas to be bubbled are appropriately selected according to the use of the bubble-containing liquid manufacturing apparatus 100. In the present embodiment, the bubble-containing liquid manufacturing apparatus 100 manufactures an ozone bubble-containing liquid in which pure water is applied to the liquid and ozone is applied to the gas to be bubbled.

  FIG. 1 shows the appearance of the bubble-containing liquid manufacturing apparatus 100. (A) shows the front view of the bubble containing liquid manufacturing apparatus 100, (B) shows the side view of the bubble containing liquid manufacturing apparatus 100. FIG. As shown in FIG. 1, the bubble-containing liquid manufacturing apparatus 100 includes a configuration described later in a casing formed in a cubic box shape. The bubble-containing liquid manufacturing apparatus 100 includes an operation panel 101, and the user can arbitrarily operate the bubble-containing liquid manufacturing apparatus 100 via the operation panel 101. Furthermore, the bubble-containing liquid manufacturing apparatus 100 is provided with wheels 102 and is movable.

  In the present embodiment, each component of bubble-containing liquid manufacturing apparatus 100 is housed in one housing and is taken into another system as the housing. However, the bubble-containing liquid manufacturing apparatus 100 may be incorporated into another system for each configuration and function as a bubble-containing liquid manufacturing apparatus in the system. For example, by using each configuration of the bubble-containing liquid manufacturing apparatus 100 in the beverage manufacturing system and making the beverage a bubble-containing liquid while manufacturing the beverage, the beverage is sterilized. The bubble-containing liquid manufacturing apparatus 100 may constitute a part of the system.

  FIG. 2 shows an outline of a functional block diagram of the bubble-containing liquid manufacturing apparatus 100. As shown in FIG. 2, the bubble-containing liquid manufacturing apparatus 100 according to the present embodiment mainly generates a first bubble in the liquid and uses the first bubble-containing liquid containing the first bubble. The first bubble generating unit 110 to be supplied and the first bubble-containing liquid connected to the bubble generating unit 110 to pass the first bubble-containing liquid supplied from the bubble generating unit 110 and irradiate the first bubble-containing liquid passing therethrough with ultrasonic waves Then, the bubble of the first bubble-containing liquid is crushed to generate a second bubble, and the second bubble-containing liquid containing the second bubble is supplied. And a storage unit 130 that stores the second bubble-containing liquid supplied from the bubble crushing unit 120. The bubble generation unit 110, the bubble crushing unit 120, and the storage unit 130 are connected to each other and form a circulation cycle (loop) for circulating the bubble-containing liquid.

  In addition to the above configuration, the bubble-containing liquid manufacturing apparatus 100 is connected to the storage unit 130 and is connected to the stock solution introduction unit 140 that introduces liquid, and the gas introduction unit 150 that is connected to the bubble generation unit 110 and introduces gas. And a flow path connecting each section, a valve provided at each position of the flow path, and a control section 160 that controls a series of operations of the bubble-containing liquid manufacturing apparatus 100.

  Furthermore, in the bubble-containing liquid manufacturing apparatus 100, a take-out unit 170 that takes out the produced bubble-containing liquid to the outside of the apparatus and a discharge unit 180 that discharges the liquid that is no longer needed are connected to the storage unit 130. In addition, a cooling unit 190 that supplies cooling water to the gas introduction unit 150, the bubble crushing unit 120, and the storage unit 130 is connected.

  The control unit 160 is electrically connected to the control panel and is operated by an operator. Moreover, the control part 160 controls each valve | bulb, switch, etc. which were provided in each place based on the detection information etc. of sensors, such as a water area sensor provided in each place in the bubble containing liquid manufacturing apparatus 100, and a temperature sensor.

  In the present embodiment, the stock solution introduction unit 140 is for introducing pure water into the bubble-containing liquid production apparatus 100 as an example of a liquid. The stock solution introducing unit 140 is connected to a pure water supply source (not shown) via a valve. The liquid introduced from the stock solution introduction unit 140 once introduces the liquid into the storage unit 130 and is supplied to the gas-liquid mixer 111 of the bubble generation unit 110 via the recursive channel 103 described later. However, depending on the type of bubble-containing liquid produced by the bubble-containing liquid production apparatus 100, the stock solution introducing unit 140 may be beverages other than pure water, beverages such as milk, fruit juice, liquor, or distilled water, Other liquids such as irrigation water may be introduced.

  In the present embodiment, the gas introduction unit 150 is for introducing ozone into the bubble generation unit 110 as an example of a gas to be bubbled. The gas introduction unit 150 is a well-known ozone generator that supplies ozone, and is connected to a bubble gas supply source via a pressure gauge, a flow meter, and a check valve. However, the gas introduction unit 150 may introduce other gases such as oxygen, nitrogen, hydrogen, ammonia, carbon dioxide other than ozone, depending on the type of bubble-containing liquid produced by the bubble-containing liquid production apparatus 100. For example, when bubbling nitrogen, the gas introduction unit 150 may be connected to the nitrogen tank 131 in order to introduce nitrogen instead of the ozone generator.

  The bubble generation unit 110 is supplied with a gas-liquid mixer 111 that mixes liquid and gas, and a bubble generator 112 that is supplied with the bubble-containing liquid in which the gas is mixed by the gas-liquid mixer 111 and generates a first bubble-containing liquid. And a gas-liquid pump 113 for supplying the bubble-containing liquid from the gas-liquid mixer 111 to the bubble generator 112.

  As the gas-liquid pump 113, a conventionally well-known air-driven positive displacement pump is applied. However, a non-positive displacement pump such as a magnet pump or an axial flow pump may be applied, and other pumps may be applied. Also good.

  The gas-liquid mixer 111 is provided on the upstream side of the gas-liquid pump 113, and is connected to a liquid intake (not shown) connected to a recursive outlet 134 of the storage unit 130 described later and a gas supply path. A gas inlet (not shown). The gas-liquid mixer 111 is supplied with the stock solution once supplied from the stock solution introduction unit 140 to the storage unit 130 or the bubble-containing solution stored in the storage unit 130 via the recursive channel 103.

  In the gas-liquid mixer 111, a liquid channel (not shown) connected to the liquid inlet and a gas channel (not shown) connected to the gas inlet are formed so that the gas is taken in along the liquid flow. The gas is sucked simultaneously with the liquid by using the suction force of the gas-liquid pump 113. As a result, the liquid and the gas are smoothly supplied to the gas-liquid pump 113, and the liquid and the gas are mixed in the gas-liquid pump 113 to generate a bubble-containing liquid. According to such a gas-liquid mixer 113, there is no problem that a large amount of gas is introduced and the gas-liquid pump 113 is idled, and that no gas enters and the generation of bubbles is not quantified. This bubble mixture is supplied to the bubble generator 112.

The bubble generator collides the swirl part 114 that forms a swirl flow by spirally swirling the bubble-containing liquid supplied from the gas-liquid mixer 111, and the bubbles of the bubble-containing liquid that has formed the swirl flow collide with the protrusion 115a. a protruding crush unit 115 to cause it collapsed, and 蓄 cultivate portion 116 to the bubble-containing liquid retained certain time containing crushed air bubbles, foam part 117 foaming the bubble-containing liquid after the residence fixed time at a high concentration With.

  FIG. 3 shows the bubble generator 112, (A) shows a perspective view of the bubble generator 112, and (B) shows a side sectional view of the bubble generator 112. As shown in FIG. 3A, the bubble generator 112 is connected to the first cylindrical portion 112a and the first cylindrical portion 112a, and extends in the same direction as the first cylindrical portion 112a. A second cylindrical portion 112b having a diameter larger than 112a and a third cylindrical portion connected to the second cylindrical portion 112b, extending in the same direction as the second cylindrical portion 112b, and having a smaller diameter than the second cylindrical portion 112b 112c. The bubble generator 112 is substantially vertically extended by the first to third cylindrical portions 112c, and is arranged so that the first cylindrical portion 112a is positioned downward and the third cylindrical portion 112c is positioned upward. The

  As shown in FIG. 3B, the turning portion 114 is provided in the first cylindrical portion 112a and has a turning surface 114a formed in a spiral shape inside the cylinder. The swivel surface 114a spirally extends in the axial direction of the column so as to obtain a swirl flow that rotates in the circumferential direction of the first cylindrical portion 112a and proceeds in the axial direction of the column. Therefore, the swirling unit 114 spirally swirls the bubble-containing liquid supplied from the gas-liquid mixer 111 to form a swirling flow, and supplies the bubble-containing liquid to the protrusion crushing unit 115. The swirling unit 114 can accelerate the flow velocity by forming a swirling flow using the supply pressure of the gas-liquid pump 113.

  The swivel unit 114 desirably has a swivel surface 114a from which at least 1.5 rotations or more can be obtained. However, the swirl unit 114 increases the rotational speed of the swirling flow to increase the flow velocity, but also increases the pressure loss. Therefore, the swirling surface 114a is determined based on the lift capacity of the gas-liquid pump 113 and the required bubble concentration. The optimum rotational speed is determined.

  The protrusion crushing portion 115 is provided in the second cylindrical portion, is formed in a cylindrical shape, and includes a multi-step protrusion 115a along the axial direction on the inner peripheral surface of the cylinder. The protrusions 115a are arranged so that their tips are opposed to each other. Thereby, the protrusion crushing portion 115 is formed with a flow path having a circular cross section, and a plurality of protrusions 115a protrude toward the inside of the circular shape, forming a hollow space where the protrusion 115a does not exist in the center portion. Therefore, the protrusion crushing part 115 is provided downstream of the swivel part 114, and the bubble-containing liquid that has passed through the swivel part 114 is sheared and crushed by the protrusion 115a. As a result, the bubbles of the bubble-containing liquid are crushed by hitting the protrusions 115a and become finer bubbles, and the bubble-containing liquid is improved in bubble concentration by reducing the bubbles.

  The protrusions 115a have at least six steps or more and are alternately arranged at an angle of 36 degrees or more in the longitudinal direction. The bubble-containing liquid accelerated by the swivel member 114 is crushed while hitting the protrusion 115a, and the gas is further refined. Since the pressure loss increases as the number of protrusions 115a increases, the number of protrusions 115a is determined from the lifting capacity of the gas-liquid pump 113 and the required bubble concentration.

蓄 nutrient unit 116 is provided inside the second cylindrical portion 112b, a space inside the second cylindrical portion 112b. 蓄 nourishment 116 improved bubble-containing liquid of the bubble concentration for a predetermined residence time by passing through the projection crushing unit 115. Thereby, the retained charge amount and the zeta potential in the bubble generated by the shear collapse at the protrusion collapse portion 115 can be made uniform. Therefore, the 蓄 nourishing unit 116, it is possible to align the particle size of the bubbles of the bubble-containing liquid. Further, 蓄 nourishing unit 116 is connected to 蓄 YoKa divider (not shown), it is possible to pressurize the 蓄 nutrient portion 116 at a predetermined pressure (0.8MPa～2.0MPa). Thus, by utilizing the pressure reduction effect by excess gas, by increasing the pressure in 蓄 nourishing unit 116 at a constant pressure, it has a function of improving the bubble concentration.

Volume of 蓄 nutrient unit 116, the optimum value is determined by the supply flow rate and the type of gas pump 113. Usually, the range of 1/20 to 1/5 of the supply flow rate is the optimum value. The supply diversion of 蓄 nutrient portion 116 is the supply flow rate of the bubble generating portion 110, a bubble-containing liquid of the flow rate is supplied to the bubble collapse portion 120 provided downstream.

  As shown in FIGS. 3B and 4, the foamed portion 117 is provided in the third cylindrical portion 112 c and is generally formed in a columnar shape. A slit hole 117a provided in the center of the circular cross section is provided on the lower surface of the cylinder, and further, a re-pressurizing space 117b in the cylinder continuing to the slit hole 117a and a re-pressurizing space 117b are continuous and tapered. A conical tapered space 117c is formed.

Slit 117a is flowed temporarily retained by bubble-containing liquid with 蓄 hydroponic unit 116. The repressurization space 117b includes an outlet 117d for allowing the liquid to flow out with an opening area smaller than the opening area of the slit hole 117a in order to pressurize the bubble-containing liquid that has passed through the slit hole 117a, and the periphery of the outlet 117d. Moreover, it has the collision wall 117e located in the back surface side of a slit board. In the repressurizing space 117b, the bubble-containing liquid that has flowed in through the slit hole 117a collides with the collision wall and the bubbles are crushed, creating turbulent flow in the space, and a part of the bubble-containing liquid is discharged from the outlet. To the taper space 117c. As a result, the bubble-containing liquid is pressurized again in the repressurization space 117b.

  The tapered space 117c has a tapered surface 117f that diffuses in a conical shape at an angle smaller than, for example, 15 degrees from the outlet 117d. As a result, the liquid that has passed through the slit hole 117a flows in the inclined direction of the tapered surface 117f while being pressurized and is depressurized. More specifically, the pressure in the repressurization space 117b is about 3 MPa, but in the taper space 117c, the pressure is reduced to 1 MPa, and the concentration of the bubble-containing liquid is improved.

The bubble generator 110, the gas-liquid mixer 111 pivot portion 114 of the bubble-containing liquid supplied bubble generator 112 from protruding crush unit 115, 蓄 nourishing unit 116, by going through the foam portion 117, the bubble-containing liquid A first bubble is generated from the bubble. Thereby, the bubble production | generation part 110 can supply the 1st bubble containing liquid containing a 1st bubble to the bubble crushing part 120. FIG. In the present embodiment, the bubble generation unit 110 generates microbubbles having a uniform particle size in the micro order as the first bubbles (see JP-A-2015-188671).

Bubble generating portion 110 of the bubble-containing liquid producing apparatus 100 according to the present embodiment, turning, crushing, 蓄 cultivate, has a function of foam (pressurized vacuum), Ya pneumatic bellows pump is a pump of low head capacity Even a diaphragm pump of the same type can generate fine, uniform, high-concentration microbubbles, and a further improvement in concentration can be achieved with a magnet pump or an axial flow pump. For this reason, the bubble generator which does not choose the kind of gas-liquid pump 113 by these functions is attained.

  The bubble generation unit 110 may have another configuration as long as the first bubble that is crushed by the bubble crushing unit 120 can be generated. For example, a well-known swirling flow type bubble generating device (see Japanese Patent Application Laid-Open No. 2006-116365), a pressure shearing type bubble generating device (see Japanese Patent Application Laid-Open No. 2006-272232), and the like are used as the bubble generator 112. Can be used as However, in order to supply bubbles having a uniform particle size to the bubble crushing unit 120, it is desirable to use the bubble generator 112 according to the present embodiment.

Also, bubble generator 112 of the bubble generator 110, pivot 114, projecting crushing unit 115, 蓄 nutrient unit 116 and the blowing unit 117 are modularized, plurality as permeate different amounts to pass per time Modules may be prepared. You may comprise so that arbitrary one modules can be selected and attached from these several modules. Further, each module may be replaceable.

  FIG. 5 shows the bubble crushing portion 120, (A) shows a side view of the bubble crushing portion 120, and (B) shows a front view of the bubble crushing portion 120. The bubble crushing unit 120 is connected to the bubble generator 112 of the bubble generating unit 110, and a passage 121 that allows the first bubble-containing liquid manufactured by the bubble generating unit 110 to pass therethrough, and an exterior body 122 that covers the periphery of the passage 121. And a two-layer structure having an intermediate space 123 from the passage 121 and the exterior body 122. The bubble crushing portion 120 is arranged so that the passage 121 extends in the horizontal direction.

  An ultrasonic transducer 124 is provided in the exterior body 122, and each ultrasonic transducer 124 irradiates ultrasonic waves toward the passage 121. The propagation liquid is filled between the passage 121 and the exterior body 122, and the ultrasonic wave irradiated from the ultrasonic vibrator 124 is propagated into the passage 121 through the propagation liquid and flows inside the passage 121. Ultrasonically crush the bubble-containing liquid.

  The passage 121 is formed of a pipe made of PVC (polyvinyl chloride). Thus, the passage 121 has a circular cross section and extends in a cylindrical shape with the same diameter, thereby forming a uniform flow path. The passage 121 is connected so as to be interposed between the bubble generation unit 110 and the storage unit 130, and the first bubble-containing liquid supplied from the bubble generation unit 110 is filled inside the passage 121 and is stored in the storage unit 130. To be washed away.

  The exterior body 122 is made of stainless steel and includes a side circumferential member 122a extending in a hexagonal column shape having a regular hexagonal cross section, and a pair of disk-shaped planar members 122b sandwiching the side circumferential member 122a from both sides in the extending direction. . Both planar members 122b are fitted with a passage 121 at the center, and the passage 121 is fixed so that the passage 121 extends to the hexagonal center of the side circumferential member 122a. Thus, an intermediate space 123 is formed on the outer side of the passage 121 and the side peripheral member 122a of the exterior body 122, and the outer periphery of the passage 121 and each surface of the hexagonal side peripheral member 122a have the same intermediate space 123 respectively. Forming.

  FIG. 6 is a side cross-sectional view of the bubble crushing portion 120 taken along the arrow a-a ′ in FIG. 5. As shown in FIG. 6, the bubble crushing portion 120 is filled with a propagation liquid capable of propagating ultrasonic waves in an intermediate space 123 formed by a passage 121 and an exterior body 122. In the present embodiment, the cooling water supplied from the cooling unit 190 is filled as the propagation liquid. The propagation liquid is introduced from the propagation liquid introduction port 122c provided below the planar member 122b of the exterior body 122 in the bubble crushing portion 120 disposed in a state where the passage 121 faces in the horizontal direction, and the planar surface of the exterior body 122 is obtained. It is derived from a propagation liquid outlet 122d provided on the upper side of the member 122b. Thereby, in the intermediate space 123, the propagation liquid is supplied from the left side of the drawing, filled from the lower side to the upper side, and discharged from the upper side. Therefore, the propagation liquid is filled without leaving air in the intermediate space 123.

  The ultrasonic wave irradiated from the ultrasonic vibrator 124 attached to the exterior body 122 is propagated to the passage 121 via the propagation liquid. At this time, if air remains in the intermediate space 123, the propagation rate of the propagation liquid and the air is different, so that the ultrasonic waves do not propagate evenly. Therefore, by leaving no air in the intermediate space 123, the ultrasonic waves can be propagated efficiently and uniformly into the passage 121.

  The propagating liquid is constantly flowing through the intermediate space 123. Thereby, the heat of the bubble crushing part 120 by ultrasonic crushing can be discharged | emitted. The propagating liquid flows in the same direction as the bubble-containing liquid flowing in the passage 121. Thereby, heat can be efficiently discharged. Further, the heat discharge efficiency can be further increased by increasing the flow velocity of the propagation liquid. The flow velocity of the propagation liquid can be achieved, for example, by controlling a pump that sends the propagation liquid to the bubble collapse portion 120. The exterior body 122 is provided with a heat sensor (not shown), and can control the flow velocity of the propagation liquid while observing the heat generation state of the bubble collapse portion 120.

  In the embodiment according to the present invention, the propagation liquid is steadily flowed, but only when the temperature of the bubble crushing portion 120 rises by filling the intermediate space once and stopping the supply of the propagation liquid. You may make it flow a liquid again. Although the propagating liquid propagates ultrasonic waves, loss due to the propagation still occurs, so that the intermediate space 123 is preferably narrow. However, if the propagation space is too narrow, the amount of cooling water (propagation liquid) decreases, and the heat discharge efficiency decreases. However, by allowing the propagation liquid to flow constantly, it is possible to suppress a decrease in heat discharge efficiency, to narrow the intermediate space 123, and to increase the degree of freedom in design of the bubble collapse portion 120. .

  Referring to FIG. 5 again, the exterior body 122 has an ultrasonic transducer 124 attached to each surface of the hexagonal column. The ultrasonic transducers 124 are provided in two stages in the extending direction of the passage 121, the bubble generating unit 110 side being the preceding ultrasonic transducer group, and the storage unit 130 side being the subsequent ultrasonic transducer group. It is said. Each stage of the ultrasonic transducer group is composed of six ultrasonic transducers 124 provided radially from the central axis of the passage 121. The two ultrasonic transducers 124 facing each other constitute a pair of oscillators, and the six ultrasonic transducers 124 constitute three oscillator pairs. Each ultrasonic transducer can be adjusted in frequency and output by the control unit 160. In the present embodiment, the 12 ultrasonic transducers 124 irradiate ultrasonic waves with the same frequency and the same output, respectively.

  Each oscillator pair is provided at the same position in the extending direction of the passage 121 and on a pair of opposing side surfaces of the hexagonal column of the exterior body 122. Here, since the exterior body 122 is made of stainless steel, it reflects ultrasonic waves. Therefore, the ultrasonic wave oscillated from the ultrasonic transducer 124 provided on one surface of the side circumferential member 122a is reflected by the other surface facing the side circumferential member 122a. The reflected ultrasonic wave is superimposed on the ultrasonic wave irradiated from the ultrasonic transducer 124 provided on the other surface (the reflection surface).

  Each of these six ultrasonic transducers 124 irradiates ultrasonic waves toward a central point of the passage 121. Accordingly, each ultrasonic transducer 124 irradiates ultrasonic waves from different positions in different radial directions and radially inward toward the center of the passage. Thereby, it is suppressed that the bubble containing liquid which flows through the channel | path 121 is inhibited from flowing by an ultrasonic wave. In particular, each of the pair of oscillators oscillates an ultrasonic wave from the facing position toward the facing direction. As a result, an ultrasonic crushing field is formed from the center of the passage 121, the first bubble-containing liquid passing through the passage 121 is crushed, and second bubbles having a uniform particle size are generated.

  In the bubble crushing portion 120, ultrasonic waves are irradiated from a plurality of directions, and an ultrasonic crushing field is formed at a place where the ultrasonic waves are concentrated. Therefore, in this embodiment, each ultrasonic transducer group forms an ultrasonic collapse field in the passage 121. Even if all of the first bubbles are not crushed in the ultrasonic crushing field formed by the preceding ultrasonic transducer group, the ultrasonic crushing field formed by the subsequent ultrasonic transducer group remains in the remaining first Therefore, in the bubble crushing part 120 according to the present embodiment, the first bubble can be surely crushed and a uniform second bubble can be generated. In the present embodiment, the bubble crushing unit 120 generates nanobubbles having a uniform nano-order particle size as the second bubbles.

  In the present embodiment, six, that is, even-numbered ultrasonic transducers 124 are provided on the exterior body 122 of the bubble collapse portion 120 in each ultrasonic transducer group. However, the ultrasonic transducers 124 may be provided with an odd number of ultrasonic transducers 124. In this case, a plurality of pairs of oscillators and one ultrasonic transducer 124 are provided.

  FIG. 7 shows an external view of the storage unit 130, (A) shows a plan view of the storage unit 130, (B) shows a front view of the storage unit 130, and (C) shows a side view of the storage unit 130. (D) shows a bottom view of the reservoir 130. As shown in FIG. 7, the storage unit 130 mainly includes a cylindrical tank 131, and a stock solution introduction port 132 connected to the stock solution introduction unit 140 and a bubble-containing solution introduction port 133 connected to the bubble crushing unit 120. A recirculation outlet 134 connected to the recursive flow path 103, a bubble-containing liquid outlet 135 connected to the extraction section 170, and a discharge outlet 136 connected to the discharge section 180.

  The stock solution introduction port 132 is mainly composed of a cylindrical pipe, extends from the upper surface of the tank 131 to the top surface in the tank 131, and supplies the stock solution from the stock solution introduction unit 140 to the top surface position of the tank 131. The bubble-containing liquid inlet 133 is mainly composed of a cylindrical pipe, extends from the upper surface of the tank 131 to the middle position in the tank 131, and supplies the second bubble-containing liquid to the middle position of the tank 131.

  The recursion outlet 134 is mainly made of a cylindrical pipe, extends from the lower surface of the tank 131 to the vicinity of the lower 1/4 position in the tank 131, and contains bubbles at the lower 1/4 position of the tank 131. The liquid is led out to the recursive flow path 103 and the bubble-containing liquid is recirculated to the gas-liquid mixer 111. The bubble-containing liquid outlet 135 is mainly composed of a cylindrical pipe, extends from the bottom surface of the tank 131 to the lower stage in the tank 131, and takes out the bubble-containing liquid from the bottom of the tank 131. The discharge port 136 mainly includes a cylindrical pipe, extends from the bottom surface of the tank 131 to the lower stage in the tank 131, and discharges the bubble-containing liquid from the bottom of the tank 131.

  The tank 131 is made of PVC as a material and has a completely sealed structure. Thereby, even if the trace gas generated at the time of the ultrasonic crushing of the bubble crushing part 120 flows into the storage part 130, it does not come into contact with the atmosphere. Therefore, in this Embodiment, even if it is a case where an ozone nanobubble containing liquid is produced | generated, the human body danger by ozone leak can be prevented. Further, since the tank 131 has a sealed structure, the pressure in the storage unit 130 can be controlled. The bubble-containing liquid outlet 135 is provided with a decompression bubble (not shown).

  In the present embodiment, the tank 131 is made of PVC. However, the tank 131 may be made of a resin material such as a fluorine-based resin such as PVDF or quartz. In the case of a resin material, the upper part of the tank 131 has a completely sealed structure by resin welding or adhesion. In the case of quartz, the tank 131 has a sealed structure through a sealing material such as PTFE or Viton.

  Since the reservoir 130 has a sealed structure, it is possible to prevent human danger due to ozone leakage when ozone nanobubbles are generated, hydrogen nanobubbles can prevent explosion hazard due to contact between hydrogen and oxygen, and even in response to organic synthesis reaction by bubbles, Since there is no mixing of gas components in the air, a stable organic synthesis reaction can be obtained.

  In bubble-containing liquid manufacturing apparatus 100 according to the present embodiment, bubble crushing section 120 and storage section 130 are separated. Thereby, a fixed amount of bubble-containing liquid with a uniform particle diameter can be continuously supplied without being affected by the capacity of the storage unit 130. Moreover, since the 2nd bubble with a uniform particle diameter is produced | generated by the ultrasonic crushing field in the bubble crushing part 120, and it stores in the storage part 130, it is also suppressed that a bubble aggregates in the storage part 130. FIG. . In other words, since ultrafine bubbles with different particle sizes are aggregated by storage, bubbles having ultrafine particle sizes generated by conventional ultrasonic crushing are not uniform in particle size. However, according to the bubble-containing liquid manufacturing apparatus 100 according to the present embodiment, bubbles having a uniform particle size are generated and can be stored without agglomeration.

  The positions of the stock solution inlet 132, the bubble-containing liquid inlet 133, the recursive outlet 134, and the good bubble-containing liquid outlet 135 provided in the tank 131 can be changed as appropriate. Further, other inlets and outlets may be provided in the tank 131.

  Next, the manufacturing method of the bubble containing liquid using the bubble containing liquid manufacturing apparatus 100 is demonstrated with reference to FIG.

  The bubble-containing liquid manufacturing method according to the present invention supplies liquid to the bubble-containing liquid manufacturing apparatus 100 (step 1), supplies gas to the bubble-containing liquid manufacturing apparatus 100 (step 2), and supplies liquid and gas. Generating a bubble-containing liquid by mixing (step 3), producing a first bubble-containing liquid from the bubble-containing liquid (step 4), irradiating the first bubble-containing liquid with ultrasonic waves, Crush the bubble to generate a second bubble (step 5), store the second bubble-containing liquid (step 6), and recurse the stored bubble-containing liquid to the bubble generating unit 110 (step) 7) including taking out the stored bubble-containing liquid to the outside (step 8).

  In step 1, first, liquid is supplied from the stock solution introduction unit 140 to the storage unit 130. Specifically, the valve provided in the stock solution introduction unit 140 is opened to supply the stock solution to the storage unit 130. At this time, the stock solution is continuously supplied until the tank 131 of the storage unit 130 is filled with a predetermined amount of liquid. Next, the stock solution is supplied to the gas-liquid mixer 111 through the recursive channel 103. Specifically, the recursive valve provided in the recursive flow path 103 is opened, and the stock solution stored up to the lower 1/4 position in the tank 131 by the suction of the gas-liquid pump 113 is stored in the gas-liquid mixer 111. Introduced into the liquid intake.

  In step 2, first, gas is supplied from the gas supply unit to the gas-liquid mixer 111. This step is performed in parallel with the previous step 1. Specifically, a valve provided in the gas introduction unit 150 is opened to supply gas to the gas-liquid mixer 111.

  In step 3, a bubble-containing liquid is first manufactured. Specifically, the gas-liquid pump 113 is operated to cause the gas-liquid mixer 111 to suck the stock solution and the gas. At this time, the stock solution is supplied to the gas-liquid mixer 111 in step 1, and in parallel with this, the gas is supplied to the gas-liquid mixture in step 2, and a bubble-containing liquid is generated. Next, the produced bubble-containing liquid is supplied to the bubble generator 112. Specifically, the gas-liquid pump 113 discharges the bubble mixture.

In step 4, first, a first bubble-containing liquid is produced from the bubble-containing liquid. Specifically, the bubble-containing liquid is formed is introduced swirling flow in the swirl unit 114 is crushed by the projections crush unit 115, it is temporarily retained in 蓄 hydroponic unit 116 is decompressed by the foam section 117. Next, the bubble-containing liquid that has passed through the foaming part 117 is supplied to the bubble crushing part 120. Specifically, 蓄 nourishing unit 116 is pressurized by 蓄 YoKa pressure portion, a bubble-containing liquid to the bubble collapse unit 120 through the foam portion 117 at a predetermined pressure is supplied.

  In step 5, first, the propagation liquid flows into the intermediate space 123. Specifically, the propagation liquid is constantly flowed in a state where the intermediate space is filled. The propagation liquid can be supplied regardless of the flow of the bubble-containing liquid. That is, the propagating liquid can be flowed or stopped before the bubble-containing liquid passes through the passage 121 or during the passage.

  Next, the first bubble-containing liquid passes through the passage 121. Specifically, the first bubble-containing liquid passes in a state where the passage 121 is filled. At the same time, the first bubble-containing liquid is irradiated with ultrasonic waves. Specifically, an ultrasonic crushing field where ultrasonic waves concentrate inside the passage 121 is formed, and the first bubble is crushed to generate the second bubble. Next, the bubble-containing liquid that has passed through the passage 121 is supplied to the reservoir 130.

  In step 6, first, the second bubble-containing liquid is introduced into the reservoir 130 via the bubble-containing liquid introduction port 133. The bubble-containing liquid introduction port extends to the middle position of the tank 131, and the second bubble-containing liquid is introduced to the middle position of the tank 131. The introduced bubble-containing liquid mixes with the liquid already stored, and the bubbles diffuse in the liquid.

  Due to the diffusion of the bubbles, an NB region having a nano-order particle size, which is dominated by so-called nano bubbles, is formed at the bottom of the tank 131, and an MN region in which nano bubbles and micro bubbles are mixed is formed above the NB region. Furthermore, an MB region in which the presence of microbubbles is dominant is formed on the upper side. In each region, the position in the tank 131 varies depending on the amount of liquid stored.

  In Step 7, first, the bubble-containing liquid stored in the storage unit is returned to the gas-liquid mixer 111. Specifically, the valve provided in the recursive flow path is opened, and the stored bubble-containing liquid is introduced into the liquid inlet of the bubble generation unit 110 by the suction of the gas-liquid pump 113. Since the recursion outlet 134 extends to the vicinity of the lower 1/4 position in the tank 131, the bubble-containing liquid in the MN region or MB region is recurred. The recursion of the bubble-containing liquid is continuously performed.

  In step 8, the bubble-containing liquid stored in the storage unit 130 is taken out. Specifically, the valve provided in the extraction unit 180 is opened, and the bubble-containing liquid on the bottom side of the tank 131 is extracted to the outside. Since the NB region is formed at the bottom of the tank 131, the bubble-containing liquid in the NB region is taken out. Finally, the bubble-containing liquid manufacturing apparatus 100 discharges the bubble-containing liquid from the discharge port 136 and ends the operation.

  In the present embodiment, each of the ultrasonic transducers 124 of the ultrasonic crushing unit 120 has always been operated with a constant output. For example, the bubble concentration of the bubble-containing liquid stored in the storage unit The frequency and output may be adjusted according to the above.

  <Second Embodiment>

  Next, the bubble containing liquid manufacturing apparatus 200 which concerns on the 2nd Embodiment of this invention is demonstrated with reference to FIG. The bubble-containing liquid manufacturing apparatus 200 according to the present embodiment is mainly characterized by including two bubble crushing portions 220, and the other configuration is the same as that of the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment. It is the same. Therefore, in the following description, only the characteristic part of the bubble-containing liquid manufacturing apparatus 200 according to the second embodiment will be described, and the configuration similar to that of the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment will be described. Will not be described.

  The bubble-containing liquid manufacturing apparatus 200 includes two bubble crushing parts 220. Bubble crushing unit 220 is connected in parallel to storage unit 230 and bubble generation unit 210. Each of the two bubble crushing parts 220 has the same capability as the bubble crushing part 120 of the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment.

  Therefore, the bubble generation unit 210 can supply twice the amount of the first bubble-containing liquid as compared with the bubble generation unit 110, and the first bubble-containing liquid is supplied to the two bubble crushing units 220. Divide and supply. As a result, the two bubble crushing units 220 of the bubble-containing liquid manufacturing apparatus 200 supply twice the amount of the second bubble-containing liquid to the storage unit 230.

  Thus, by providing a plurality of bubble crushing portions 220, it is possible to increase the production amount of the bubble-containing liquid per unit time. Alternatively, by providing a plurality of bubble crushing portions 220, the passage of each bubble crushing portion 220 can be reduced. When the passage is small, an ultrasonic crushing field can be accurately formed, and a liquid containing ultrafine bubbles having a uniform particle diameter can be efficiently produced.

  In the present embodiment, one bubble generation unit 210 is connected to two bubble crushing units. However, a bubble generation unit is provided for each of a plurality of bubble crushing units 220, and each bubble generation unit is set to 1 You may connect to a bubble collapse part by the one-to-one relationship.

  <Third embodiment>

  Next, a bubble-containing liquid production apparatus 300 according to a third embodiment of the present invention will be described with reference to FIG. The bubble-containing liquid manufacturing apparatus 300 according to the present embodiment is mainly characterized by supplying a bubble-containing liquid directly to the outside without including a storage unit, and the other configurations are related to the first embodiment. The same as the bubble-containing liquid manufacturing apparatus 100. Therefore, in the following description, only the characteristic part of the bubble-containing liquid manufacturing apparatus 300 according to the third embodiment will be described, and the same configuration as the bubble-containing liquid manufacturing apparatus 100 according to the first embodiment will be described. Description is omitted.

  The bubble-containing liquid manufacturing apparatus 100 does not include a storage unit, and the bubble crushing unit 320 is directly connected to the extraction unit 370. In addition, the stock solution introducing unit 340 is directly connected to the gas-liquid mixer 311 of the bubble generating unit 310. As a result, the first bubble-containing liquid produced by the bubble generating unit 310 is ultrasonically crushed by the bubble crushing part 320 without forming a circulation cycle of the bubble-containing liquid, and the second bubble-containing liquid is bubble-collapsed. It is taken out directly from the unit 320.

  <Modification>

  A modification of the bubble crushing portion 120 of the present invention will be described with reference to FIG.

  FIG. 11A shows a first modification of the bubble collapse portion 120. In the bubble crushing portion 120A according to the first modification, the side circumferential member of the exterior body 122A is formed in a regular octagonal columnar shape, and the ultrasonic vibrator 124 is provided on each surface (Modification 1). In the first modification, the eight ultrasonic transducers 124 are provided at the same position in the axial direction (on the same cross section) to form one ultrasonic transducer group. Each ultrasonic transducer 124 emits ultrasonic waves with the same output and the same frequency, and an ultrasonic crushing field is formed in the center of the passage 121.

  FIG. 11B shows a second modification of the bubble collapse portion 120. In the bubble crushing portion 120B according to the second modified example, the side circumferential member of the exterior body 122B is formed in a regular triangular column shape, and the ultrasonic transducer 124 is provided on each surface (modified example 2). In the second modification, the three ultrasonic transducers 124 are provided at the same position in the axial direction (on the same cross section) to form one ultrasonic transducer group. Each ultrasonic transducer 124 emits ultrasonic waves with the same output and the same frequency, and an ultrasonic crushing field is formed in the center of the passage 121.

  FIG. 11C shows a third modification of the bubble collapse portion 120. In the bubble crushing portion 120C according to the third modified example, the side circumferential member of the exterior body 122 is formed in a regular hexagon, and the ultrasonic transducers 124 are provided on every other six faces of the hexagon (deformation). Example 3). In the third modification, the three ultrasonic transducers 124 are provided at the same position in the axial direction (on the same cross section) to form one ultrasonic transducer group. Each ultrasonic transducer 124 emits ultrasonic waves with the same output and the same frequency, and an ultrasonic crushing field is formed in the center of the passage 121.

  If the exterior body 122 of the bubble crushing part 120 is a regular polygon like these modifications, an ultrasonic crushing field can be formed in the center of the channel | path 121. FIG. The number of ultrasonic transducers 124 can be selected as appropriate. However, the exterior body does not have to be a regular polygon, and the ultrasonic transducers may have other arrangements as long as an ultrasonic crushing field can be formed in the passage.

  As mentioned above, although the example of the specific aspect of this invention was demonstrated by embodiment of this invention, this invention is not limited to the said embodiment.

  The present invention can be used for producing a bubble-containing liquid.

100, 200, 300 Bubble-containing liquid production apparatus 110, 210, 310 Bubble generation unit 120, 220, 320 Bubble crushing unit 121 Passage 122 Exterior body 124 Ultrasonic vibrator 130, 230 Storage unit

Claims (13)

A bubble generating unit for generating a first bubble in the liquid and supplying a first bubble-containing liquid containing the first bubble;
The first bubble-containing liquid is connected to the bubble generation unit, passes the first bubble-containing liquid supplied from the bubble generation unit, and irradiates the first bubble-containing liquid passing therethrough with ultrasonic waves. A bubble crushing section that generates a second bubble by crushing the bubble and supplying a second bubble-containing liquid containing the second bubble;
A storage section connected to the bubble collapse section and storing the second bubble-containing liquid supplied from the bubble collapse section;
The bubble crushing portion includes a passage through which a bubble-containing liquid passes and a plurality of ultrasonic vibrators that irradiate ultrasonic waves from different directions from the outside to the inside of the passage.
The plurality of ultrasonic transducers form at least one ultrasonic transducer group;
The bubble-containing liquid manufacturing apparatus according to claim 1, wherein the ultrasonic transducer of each transducer group irradiates ultrasonic waves toward the center of the passage.
The plurality of ultrasonic transducers form a plurality of pairs of transducers,
3. The bubble-containing liquid manufacturing apparatus according to claim 1, wherein the plurality of vibrator pairs irradiate ultrasonic waves from opposite directions toward the center of the passage.
The bubble-containing liquid manufacturing apparatus according to any one of claims 1 to 3, wherein each ultrasonic transducer is capable of adjusting an oscillation frequency.
The bubble-containing liquid manufacturing apparatus according to claim 4, wherein the output of each ultrasonic transducer is adjustable.
The bubble collapse portion includes an exterior body that covers the periphery of the passage,
A propagation liquid capable of propagating ultrasonic waves is filled between the passage and the exterior body,
The bubble-containing liquid manufacturing apparatus according to claim 1, wherein the ultrasonic transducer is attached to the outside of the exterior body.
The passage is formed of a resin material,
The bubble-containing liquid manufacturing apparatus according to claim 6, wherein the exterior body is formed of a metal material.
The bubble collapse portion is arranged so that the passage is in a horizontal direction,
The bubble-containing liquid manufacturing apparatus according to claim 6 or 7, wherein the propagation liquid is introduced from the lower side of the outer package, is led out from the upper side, and is led in and out constantly.
The reservoir is connected to the bubble generator,
A part of the bottom side of the bubble-containing liquid stored in the storage unit is supplied to the outside,
The bubble-containing liquid manufacturing apparatus according to any one of claims 1 to 8, wherein a part of the center of the bubble-containing liquid stored in the storage unit is supplied to the bubble generation unit.
A loop formed by the bubble generation unit, the bubble crushing unit, and the storage unit is a sealed structure that is cut off from the atmosphere,
The bubble-containing liquid manufacturing apparatus according to claim 9, wherein the storage section is capable of adjusting an internal pressure.
The said bubble production | generation part is a bubble containing liquid manufacturing apparatus as described in any one of Claims 1-10 modularized so that replacement | exchange is possible.
The first bubble-containing liquid contained in the first bubble is allowed to pass through the liquid, the first bubble-containing liquid passing therethrough is irradiated with ultrasonic waves, the bubbles of the first bubble-containing liquid are crushed and second A bubble crushing section that generates a bubble and supplies a second bubble-containing liquid containing the second bubble,
The bubble crushing portion includes a passage through which a bubble-containing liquid passes and a plurality of ultrasonic vibrators that irradiate ultrasonic waves from different directions from the outside to the inside of the passage.
A bubble generation unit that generates a bubble-containing liquid; and a bubble-containing liquid that is connected to the bubble generation unit and is supplied from the bubble generation unit, passes through the bubble-containing liquid, and is irradiated with ultrasonic waves. Production of a bubble-containing liquid using a bubble-containing liquid production apparatus, comprising: a bubble crushing part that crushes a bubble; and a storage part that is connected to the bubble crushing part and stores a bubble-containing liquid supplied from the bubble crushing part. A method,
The bubble generating unit generates a first bubble-containing liquid containing the first bubble in the liquid;
The bubble crushing unit irradiates the first bubble-containing liquid with ultrasonic waves to crush the first bubble to generate a second bubble-containing liquid containing a second bubble;
The manufacturing method of the bubble containing liquid including the said storage part storing the 2nd bubble containing liquid.

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