JP2018122294A - Bubble generation nozzle and bubble-containing liquid production system comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized bubble generation nozzle which can generate fine bubbles with good efficiency.SOLUTION: A bubble generation nozzle comprises: a gas-liquid mixing chamber 120m which has a space of a circular cross section and forms a loop flow; a liquid supply hole which is provided on one end side of the gas-liquid mixing chamber 120m and supplies a pressurized liquid to the gas-liquid mixing chamber 120m; a gas supply hole in which a gas is flown; a gas supply path 120t which is provided on the other end side of the gas-liquid mixing chamber 120m, and supplies the gas flown in from the gas supply hole to the gas-liquid mixing chamber 120m while spirally circulating the gas around a central axis of the liquid supply hole so that the gas is directed to one end side of the gas-liquid mixing chamber 120m along a circumference of the space of the gas-liquid mixing chamber 120m; and an exhaust nozzle 122g which has a hole diameter larger than a hole diameter of the liquid supply hole, and ejects a bubble-containing liquid in which the liquid and the gas are mixed in the gas-liquid mixing chamber 120m.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a bubble generation nozzle that generates fine bubbles in a liquid and a bubble-containing liquid manufacturing system that includes the bubble generation nozzle as a bubble generation unit.

  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. An apparatus for generating such fine bubbles in a liquid has been developed.

  For example, in the nanobubble manufacturing apparatus shown in Patent Document 1, it is described that microbubbles generated by a bubble generator are converted into nanobubbles by ultrasonic crushing. In the bubble generation unit of this bubble nanobubble manufacturing apparatus, fine bubbles are generated in the liquid by swirling, crushing, raising and foaming the gas-liquid mixture.

  Also, for example, there is a nozzle-type bubble generating device disclosed in Patent Document 2. In this bubble generator, the gas-liquid mixture is mixed so as to form a loop flow in the gas-liquid mixing chamber, the gas-liquid mixture is stirred by the loop flow, and the bubbles are refined in the loop flow. Fine bubbles are generated in the liquid.

Japanese Patent Laying-Open No. 2015-186871 JP 2009-189984 A

  However, the bubble generating device described in Patent Document 1 is provided with a swivel unit, a crushing unit breeding unit, and a foaming unit in order to generate bubbles, and there is a problem that the apparatus is large and complicated in structure and complicated in assembly. there were. On the other hand, the nozzle-type bubble generating device described in Patent Document 2 is easy to assemble and is assembled into a nozzle type, so that it does not increase in size, but there are cases where the ability to generate fine bubbles is not sufficient. In particular, when the nozzle is arranged on the pump discharge side, there is a problem that the gas cannot be sufficiently sucked and cannot be bubbled unless the gas pressure is increased due to the influence of the pump discharge pressure.

  This invention is made | formed in view of such a problem, and it aims at providing the small bubble production | generation nozzle which can produce | generate a fine bubble efficiently.

  The first bubble generating nozzle according to the present invention includes a substantially annular bottomed member having the first direction as an axial direction, and a substantially annular cylindrical member fitted into the bottomed member from the axial direction. The bottomed member includes an annular side wall portion that forms a columnar cylindrical space, and a bottom portion that is continuous with the side wall portion and forms a first frustoconical truncated cone space, The bottom portion of the bottomed member has a columnar liquid supply hole continuous to the first truncated conical space, and the first truncated cone space is located at the bottom surface of the truncated cone in the cylindrical space. The cylindrical member is continuous to the liquid supply hole at a truncated surface, and the cylindrical member includes an annular first side peripheral portion that forms a truncated cone-shaped second truncated conical space, and a bottom portion of the cylindrical member. An annular second side peripheral portion that forms a cylindrical ejection hole having a diameter larger than that of the liquid supply hole, and the first side peripheral portion of the cylindrical member The second truncated conical space of the cylindrical member has a plurality of recesses that open to the outside in the radial direction and extend in a spiral shape in the first direction. And the cylindrical member is fitted into the bottomed member, whereby the first truncated conical space, the cylindrical space, and the second truncated conical space form a gas-liquid mixing chamber, The recess communicates with the gas-liquid mixing chamber, the liquid is supplied to the gas-liquid mixing chamber through the liquid supply hole, and the gas is supplied to the gas-liquid mixing chamber through the recess.

  In this way, the gas-liquid mixing chamber is formed in a shape like a substantially rugby ball whose diameter is reduced from both sides of the cylinder from the first truncated cone space, the cylindrical space, and the second truncated cone space, It has a circular cross-sectional space over the entire first direction. The gas-liquid mixing chamber is supplied with liquid from a central liquid supply hole on one side of the gas-liquid mixing chamber, and is supplied with a spiral flow of gas from the other side of the gas-liquid mixing chamber. Thereby, in a gas-liquid mixing chamber, a gas-liquid mixture forms a screw-like loop flow. Accordingly, the path of the loop flow in the gas-liquid mixing chamber is substantially extended, and the gas-liquid mixture is sufficiently agitated to generate a large amount of fine bubbles. And the bubble containing liquid containing a fine bubble is ejected from an ejection hole. Thereby, a fine bubble can be produced | generated efficiently and a bubble containing liquid can be supplied.

  The second side circumferential portion of the cylindrical member further forms a truncated cone-shaped third truncated conical space, and the third truncated cone space has the truncated surface at the second truncated cone space. You may make it continue to the said ejection hole of a said 2nd side peripheral part from the opposite side of a truncated cone space. In this way, the gas-liquid mixture ejected from the ejection port is decompressed, and fine bubbles can be generated efficiently.

  The plurality of recesses provided in the first side peripheral portion may be formed at equal intervals in the circumferential direction. In this way, a uniform screw-like loop flow can be formed, and fine bubbles can be efficiently generated.

  The second bubble generating nozzle according to the present invention includes a first truncated conical space having a truncated cone shape, and a cylindrical column space that is continuous with the first truncated cone space at the bottom surface of the truncated cone. A gas-liquid mixing chamber comprising a frustoconical second frustoconical space that is continuous from the opposite side of the first frustoconical space to the cylindrical space on the bottom surface, and the first frustoconical space. The conical space, the cylindrical space, and the second truncated conical space have the same central axis, and the truncated surface of the second truncated conical space is a truncated surface of the first truncated conical space. A gas that is larger than the surface and is supplied from the truncated surface of the first truncated conical space to the gas-liquid mixing chamber and forms a spiral flow along the side periphery of the cylindrical space is the second gas. The gas-liquid mixture, which is supplied from the side periphery of the bottom surface of the truncated conical space and is a mixture of liquid and gas in the gas-liquid mixing chamber, is the second truncated cone. Ejected from the truncated face of the cone space.

  In this way, the gas-liquid mixing chamber is formed in a shape like a substantially rugby ball whose diameter is reduced from both sides of the cylinder from the first truncated cone space, the cylindrical space, and the second truncated cone space, It has a circular cross-sectional space over the entire first direction. The gas-liquid mixing chamber is supplied with liquid from a central liquid supply hole on one side of the gas-liquid mixing chamber, and is supplied with a spiral flow of gas from the other side of the gas-liquid mixing chamber. Thereby, in a gas-liquid mixing chamber, a gas-liquid mixture forms a screw-like loop flow. Accordingly, the path of the loop flow in the gas-liquid mixing chamber is substantially extended, and the gas-liquid mixture is sufficiently agitated to generate a large amount of fine bubbles. And the bubble containing liquid containing a fine bubble is ejected from an ejection hole. Thereby, a fine bubble can be produced | generated efficiently and a bubble containing liquid can be supplied. Further, since the gas introduction portion is skewed, the pressure of the liquid is not directly pressurized to the gas, so that bubbles can be generated without any problem even at a low gas pressure.

A plurality of gas supply paths are formed on the outside of the side surface of the second truncated conical space and are spirally spaced at equal intervals that rotate with the same central axis as the second truncated conical space. ,
A gas that forms a spiral flow from the outer periphery of the second truncated conical space along the outer periphery of the cylindrical space may be supplied via the gas supply path. If it does in this way, the gas supply path can supply the gas which forms a spiral flow reliably, can produce | generate a fine bubble efficiently and can supply a bubble containing liquid.

  Further, a cylindrical ejection hole continuing to the truncated surface of the truncated cone in the second truncated cone space, and a second continuous from the side opposite to the second truncated cone space to the ejection hole on the bottom surface. The bubble-containing liquid that has three frusto-conical spaces and is ejected from the fringe surface of the second frusto-conical space passes through the ejection holes, and the truncated surface of the third frusto-conical space You may make it eject toward the bottom from. In this way, the gas-liquid mixture ejected from the ejection port is decompressed, and fine bubbles can be generated efficiently.

  The third bubble generating nozzle according to the present invention has a space of a circular cross section, and is provided with a gas-liquid mixing chamber that forms a loop flow, one end side of the gas-liquid mixing chamber, and a pressurized liquid A liquid supply hole that supplies gas to the gas-liquid mixing chamber, a gas supply hole into which gas flows, and a gas supply hole that is provided on the other end side of the gas-liquid mixing chamber, A gas supply path for supplying the gas-liquid mixing chamber to the one end side of the gas-liquid mixing chamber along the circumference of the space of the gas-liquid mixing chamber while spirally turning around the central axis; Provided at the other end of the gas-liquid mixing chamber so as to coincide with the central axis of the liquid supply hole, and has a hole diameter larger than that of the liquid supply hole, and the liquid and gas are mixed in the gas-liquid mixing chamber. And an ejection hole for ejecting the bubble-containing liquid.

  In this way, the gas-liquid mixing chamber is formed in a shape like a rugby ball having a circular cross section and having a diameter reduced from the center toward both sides. The gas-liquid mixing chamber is supplied with liquid from a central liquid supply hole on one side of the gas-liquid mixing chamber, and is supplied with a spiral flow of gas from the other side of the gas-liquid mixing chamber. Thereby, in a gas-liquid mixing chamber, a gas-liquid mixture forms a screw-like loop flow. Accordingly, the loop flow path in the gas-liquid mixing chamber is extended, the gas-liquid mixture is sufficiently stirred, and a large amount of fine bubbles are generated. And the bubble containing liquid containing a fine bubble is ejected from an ejection hole. Thereby, a fine bubble can be produced | generated efficiently and a bubble containing liquid can be supplied.

  The gas supply path may be formed in a plurality of spiral shapes extending from the other end side to the one end side and provided at equal intervals. If it does in this way, the recessed part provided also at equal intervals can supply the gas which forms a spiral flow reliably, can produce | generate a fine bubble efficiently and can supply a bubble containing liquid.

  Further, the jet outlet has a third truncated conical space continuous at the truncated surface, and the bubble-containing liquid is discharged from the truncated surface of the third truncated cone space toward the bottom surface, thereby reducing the pressure. It spouts while being done. In this way, the gas-liquid mixture ejected from the ejection port is decompressed, and fine bubbles can be generated efficiently.

  The bubble-containing liquid production system according to the present invention includes the bubble generation nozzle and a bubble crush that is connected to the bubble generation nozzle and ultrasonically crushes the fine bubbles generated from the bubble generation nozzle to generate ultrafine bubbles. And a reservoir that is connected to the bubble collapse portion and stores the ultrafine bubble-containing liquid collapsed by the bubble collapse portion, and the reservoir is connected to the bubble generation nozzle and stored The liquid containing fine bubbles is returned to the bubble generating nozzle.

  According to this, a microbubble can be efficiently produced | generated by a bubble production | generation nozzle, and also an ultrafine bubble can be produced | generated efficiently by ultrasonically crushing a microbubble. Furthermore, since the bubble-containing liquid, the bubble crushing part, and the storage part are connected so as to circulate the bubble-containing liquid, it is possible to repeatedly generate bubbles in the bubble-containing liquid, efficiently and reliably ultrafine bubbles Can be produced.

  ADVANTAGE OF THE INVENTION According to this invention, the small bubble production | generation nozzle which can produce | generate a fine bubble efficiently can be provided.

It is a figure which shows the functional block of the bubble containing liquid manufacturing system which concerns on the 1st Embodiment of this invention. It is the schematic which shows the high voltage | pressure application part of the homogenization part of the bubble containing liquid manufacturing system shown in FIG. It is the schematic which shows the refinement | miniaturization part of the uniformization part of the bubble containing liquid manufacturing system shown in FIG. It is a figure which shows the bottomed member of the bubble production | generation part (bubble production | generation nozzle) of the bubble containing liquid manufacturing system shown in FIG. 1, (A) shows the side view of a bottomed member, (B) is the bottom face of a bottomed member. FIG. 4C is a side sectional view of the bottomed member of FIG. 4A cut by 4C-4C ′, and FIG. 4D is a perspective view of the bottomed member. It is a figure which shows the cylindrical member of the bubble production | generation part (bubble production | generation nozzle) of the bubble containing liquid manufacturing system shown in FIG. 1, (A) shows the side view of a cylindrical member, (B) is the bottom face of a cylindrical member. FIG. 4C is a side sectional view of the cylindrical member of FIG. 5A cut along 5C-5C ′, and FIG. 4D is a perspective view of the cylindrical member. The schematic sectional side view for demonstrating operation | movement of the bubble production | generation part (bubble production | generation nozzle) of the bubble containing liquid manufacturing system shown in FIG. It is a figure which shows the bubble collapse part shown in FIG. 1, (A) is a side view of a bubble collapse part, (B) shows the front view of a bubble collapse part. The figure which cut | disconnected the bubble collapse part shown to FIG. 7 (B) by 8-8 'is shown. It is the schematic which shows the storage part of FIG. 1, (A) shows the top view of a storage part, (B) shows the front view of a storage part, (C) shows the side view of a storage part, (D ) Shows a bottom view of the reservoir. It is a schematic sectional drawing which shows the deaeration part shown in FIG. It is a figure which shows the functional block of the bubble containing liquid manufacturing system which concerns on the 2nd Embodiment of this invention. It is a figure which shows the storage part of FIG. 11, (A) is a top view, (B) is sectional drawing of BB of (A). The bubble containing liquid inlet of the storage part of FIG. 12 is shown, (A) is a front view of a bubble containing liquid inlet, (B) shows the side view of a bubble containing liquid inlet.

[First Embodiment]

  A bubble-containing liquid production system 100 according to the first embodiment will be described with reference to FIGS. The bubble-containing liquid production system 100 according to the present embodiment mainly produces liquids represented by milk, fruit juice, etc., and makes particles in the liquid uniform, removes dissolved oxygen in the liquid, and sterilizes the liquid. The purpose is to produce a bubble-containing liquid. In particular, in this embodiment, the production of milk containing particles such as fat globules will be described. However, the bubble-containing liquid manufacturing system 100 may be applied to other uses. For example, ozone bubbles may be generated purely to produce a bubble-containing liquid for sterilization cleaning.

  FIG. 1 shows a functional block diagram of the bubble-containing liquid production system 100. The bubble-containing liquid manufacturing system 100 mainly includes a homogenizing unit 110 for homogenizing a liquid, a bubble generating unit 120 for generating fine bubbles in the liquid, and crushing the fine bubbles in the liquid to convert them into ultrafine bubbles. The bubble collapse part 130, the storage part 140 which stores a liquid, and the deaeration part 150 which deaerates the dissolved oxygen in a liquid are provided.

  The bubble generation unit 120, the bubble crushing unit 130, and the storage unit 140 are connected to each other and form a first circulation path 170 (loop) for circulating the bubble-containing liquid. The deaeration unit 150 is incorporated and connected in a second circulation path 180 that circulates the liquid stored in the storage unit 140.

  In addition, the bubble-containing liquid manufacturing system 100 includes a liquid introducing unit 101 that introduces liquid into the bubble-containing liquid manufacturing system 100, a gas introducing unit 102 that introduces liquid into the bubble-containing liquid manufacturing system 100, and a liquid containing bubble-containing liquid manufacturing system 100. A take-out part 103 to be taken out from the outside, a cooling part 104 for supplying cooling water to each part of the bubble-containing liquid production system 100, a pressurization part 105 for pressurizing the storage part 140, and a liquid outside the bubble-containing liquid production system 100 And a discharge unit 106 for discharging. The gas introduction unit 102 can selectively introduce a gas such as carbon dioxide gas, nitrogen gas, ozone gas, oxygen gas, or the like as a gas.

  Each part of the bubble-containing liquid manufacturing system 100 is managed by a control unit 199 that centrally manages the bubble-containing liquid manufacturing system 100. The control unit 199 may control the bubble-containing liquid manufacturing system 100 in cooperation with an external control device or the like. Moreover, each part of the bubble containing liquid manufacturing system 100 may be controlled by another control apparatus.

[Uniform section]

  The homogenizer 110 homogenizes the particles in the liquid by pulverizing and refining them. In the present embodiment, the homogenizer 110 is a homogenizer that is implemented as a so-called high-pressure valve type homogenizer (see, for example, JP 2010-17623 A). The high-pressure valve homogenizer applies high pressure to the introduced liquid by a so-called plunger pump, and ejects the liquid from a minute gap of a homovalve (homogeneous valve) provided in the liquid flow path. At that time, the particles in the liquid are pulverized and refined by colliding and shearing in the gaps. Thereby, among the particles in the liquid, those having a relatively large particle size are refined and dispersed and uniformized.

  A liquid is introduced into the homogenizing unit 110 from the liquid introducing unit 101 and a gas is introduced from the gas introducing unit 102. In this embodiment, milk (raw milk) is introduced as a liquid, and carbon dioxide gas or nitrogen gas is introduced as a gas. The liquid and the gas are introduced into the high-pressure application unit 111 via a gas-liquid mixer (not shown) and pass through the miniaturization unit 119, whereby particles or bubbles in the liquid are miniaturized.

  FIG. 2 is a schematic cross-sectional side view showing the high-pressure application unit 111 of the high-pressure valve homogenizer that functions as the homogenization unit 110 of the bubble-containing liquid production system 100. As will be described later, the high-pressure application unit 111 can apply a high pressure to the liquid by moving the plunger 112 back and forth within the cylinder block 113.

  The high pressure application unit 111 includes an introduction path 114 through which a liquid mixed with gas is introduced, a discharge valve 115 connected to the introduction path 114, a pressurization space 116 provided downstream of the discharge valve 115, and pressurization A plunger 112 that can reciprocate in the space 116 and reciprocates, a suction valve 117 provided downstream of the pressurizing space 116, and a lead-out path 118 connected to the suction valve 117 are provided.

  In the present embodiment, the introduction path 114 introduces the liquid from the paper back direction in the drawing. Further, the outlet path 118 guides the liquid in the direction of the drawing sheet. Further, the discharge valve 115 and the suction valve 117 function as a check valve that allows only the flow from the introduction path 114 to the lead-out path 118 (flow from the lower side to the upper side in FIG. 2). The plunger 112 is coupled to a drive mechanism (not shown) that drives the inside of the pressurizing space 116 provided in the cylinder block 113 so as to be able to reciprocate (in the direction of the arrow in FIG. 2). The drive mechanism includes a cam and a motor.

  The pressure space 116 is pressurized by the plunger 112 moving forward in the pressure space 116 in a state where the liquid is introduced from the introduction path 114 to the pressure space 116 via the discharge valve 115. The pressurized liquid is led out to the lead-out path 118 through the suction valve 117 in a state where high pressure is applied. At this time, the discharge valve 115 does not return the pressurized liquid to the introduction path 114 by the function of the check valve.

  On the other hand, when the plunger 112 moves backward from the pressurizing space 116, the pressurizing space 116 is depressurized. Thereby, the liquid is again introduced from the introduction path 114 via the discharge valve 115. At this time, the suction valve 117 does not return the liquid led out by the function of the check valve to the pressurized space 116. Thereby, the high voltage | pressure application part 111 can supply the liquid which the high voltage | pressure acted on. In the present embodiment, a high pressure of 10 MPa to 70 MPa acts on the liquid.

  Furthermore, the plunger 112 is designed such that its front end surface abuts against the inner surface of the pressurizing space 116 when moving forward, and further, a fine protrusion is provided on the front end surface of the plunger 112 (not shown). By doing so, a fine space is formed when the tip surface of the plunger 112 hits the inner surface of the accommodation space, and particles and bubbles are refined in the space.

  FIG. 3 is a schematic cross-sectional side view showing the miniaturization part 119 of the high-pressure valve homogenizer that functions as the homogenization part 110 of the bubble-containing liquid production system 100. In the homogenizing unit 110, the liquid led out from the lead-out path 118 of the high-pressure applying unit 111 is supplied to the micronizing unit 119 in a state where high pressure is applied (in the direction of the arrow in FIG. 3). The miniaturization part is a valve type, but may have other configurations as long as particles and bubbles in the liquid can be miniaturized.

  In the micronization unit 119, the liquid supplied in a state where high pressure is applied passes through the homogeneous valve 119a. The homogeneous valve 119a is provided with a fine gap 119b, and when passing through this fine gap, particles and bubbles collide and are sheared to become fine and uniform. By adjusting this gap, particles and bubbles can be adjusted to a desired particle size. In general, particles and bubbles that have passed through a homogeneous valve are refined to a size of about 1 μm. However, the bubbles may be refined to a micro order of several μm to several tens of μm.

  In the present embodiment, the homogenizing unit 110 is a high-pressure valve type homogenizer including a high-pressure applying unit 111 and a micronizing unit 119. However, if the particles in the liquid can be miniaturized and homogenized, other configurations are possible. Also good. The homogenizer 110 may be a single unitary device or may be separated and constructed from several separate elements.

[Bubble generator]

  The bubble generation unit 120 is a so-called bubble generation nozzle, and will be described with reference to FIGS. The bubble generation nozzle includes a bottomed tubular bottomed member 121 having a circular cross section formed at one end side and a tubular member 122 having a cylindrical shape. When the cylindrical member 122 is fitted from the other end side of the bottomed member 121, a space having a circular cross section is formed as the gas-liquid mixing chamber 120m. In the gas-liquid mixing chamber 120m, gas and liquid flow in and are mixed to generate a bubble-containing liquid that is a gas-liquid mixture.

  FIG. 4: shows the schematic of a bottomed member, FIG. 4 (A) is a side view of a bottomed member, FIG. 4 (B) is a bottom view of a bottomed member, FIG.4 (C) is 4C- of (A). Sectional drawing of 4C 'and FIG.4 (D) show the perspective view of a bottomed member. 5 shows a schematic view of the cylindrical member, FIG. 5 (A) is a side view of the cylindrical member, FIG. 5 (B) is a bottom view of the cylindrical member, and FIG. 5 (C) is FIG. Sectional drawing of 5C-5C ', FIG.5 (D) shows the perspective view of a cylindrical member. Further, FIG. 6 is a schematic side sectional view for explaining the operation of the bubble generation nozzle, in which the bubble generation nozzle is indicated by a solid line and the other configuration is indicated by a broken line.

  As shown in FIG. 4, the bottomed member 121 includes a disk-shaped bottom 121a, an annular first side wall 121b continuous with the bottom 121a, and an annular second continuous with the first side wall 121b. Side wall part 121c. The bottomed member 121 has a gas supply hole 121d that penetrates the second side wall 121b. The bottomed member 121 has a liquid supply hole 121e for supplying a liquid in the bottom 121a. As shown in FIG. 4B, the liquid supply hole 121e is provided at the center of the bottom 121a.

  As shown in FIG. 4C, the bottom 121a forms a first truncated conical space 121f having a truncated cone shape. Further, the bottom 121a, the first side wall 121b, and the second side wall 121c form a columnar first cylindrical space 121g. Furthermore, the second side wall 121c includes a second cylindrical space 121h having a slightly smaller diameter than the first cylindrical space 121g, and a third cylindrical space 121i having a larger diameter than the first cylindrical space 121g. And form.

  The first truncated conical space 121f is continuous with the liquid supply hole 121e at its truncated surface, and the first truncated cone space 121f is continuous with the first cylindrical space 121g at its bottom surface. That is, the first truncated conical space 121f extends from the liquid supply hole 121e to the first cylindrical space 121g, and extends from the inner peripheral surface of the liquid supply hole 121e to the inner peripheral surface of the first side wall 121b. It is comprised from the taper surface which continues.

  As shown in FIG. 5, the cylindrical member 122 includes an annular first side peripheral portion 122 a and a second side peripheral portion 122 b. The second side peripheral portion 122b includes a first side peripheral region 122c, a second side peripheral region 122d having a diameter larger than that of the first side peripheral region 122c, and a second diameter having a diameter smaller than that of the second side peripheral region 122d. 3 side circumferential regions 122e. The second side peripheral region 122d of the first side peripheral part 122a and the second side peripheral part 122b has the same diameter and is sized to fit in the second cylindrical space 121h of the bottomed member 121.

  As shown in FIG. 5C, the first side peripheral portion 122a forms a second truncated conical space 122f having a truncated cone shape whose diameter decreases from one to the other. The second side peripheral portion 122b forms a columnar fourth columnar space 122g extending from one side to the other, and a third truncated conical space 122h expanding in diameter from one side to the other. The second truncated conical space 122f, the fourth cylindrical space 122g, and the third truncated conical space 122h are continuous in that order, and the truncated surface of the second truncated conical space 122f, The bottom surface and the top surface of the cylindrical space 122g and the truncated surface of the third truncated cone space 122h are connected with the same hole diameter, and the second truncated cone space 122f and the fourth cylindrical space are connected. The central axis of 122g and the third truncated conical space 122h are the same.

  The first side peripheral portion 122a of the cylindrical member 122 has four spiral concave portions 122i formed on the outer periphery thereof. Each recess 122i is formed at an equal interval from each other, and extends from one to the other while being twisted. One end of each recess 122i has a communication portion 122j that communicates with the second truncated conical space 122f.

  The bottomed member 121 and the cylindrical member 122 are formed by cutting a stainless steel of SUS316. However, the bottomed member 121 and the cylindrical member 122 may be made of other metals. In addition, solid materials such as glass, ceramic, resin, and ceramics may be used, and not only cutting processing but also processing according to materials such as injection molding processing and press molding processing may be performed.

  As shown in FIG. 6, the bubble generating nozzle is fitted into the bottomed member 121 by press-fitting the cylindrical member 122 so that the first side peripheral portion 122a is at the back. The second side peripheral region 122d and the first side peripheral portion 122a of the side peripheral portion 122b are in contact with the inner surface of the first side wall portion 121b over the entire circumference in the second cylindrical space 121h of the bottomed member 121. . The first side peripheral region 122c of the second side peripheral portion 122b of the cylindrical member 122 is in an annular shape communicating with the gas supply hole 121d of the bottomed member 121 in cooperation with the second side wall portion 121b of the bottomed member 121. A space 120s is formed. The recess 122i forms a gas supply path 120t that extends from the annular space 120s to the gas-liquid mixing chamber 120m and extends spirally.

  The first truncated conical space 121f, the first cylindrical space 121g, and the second truncated conical space 122f form a gas-liquid mixing chamber 120m. In the gas-liquid mixing chamber 120m, the first truncated conical space 121f is continuous with the first cylindrical space 121g at the bottom surface, and the second truncated conical space 122f is opposite to the first truncated conical space 121f at the bottom surface. By continuing to the first cylindrical space 121g from the side, it is formed into a shape like a substantially rugby ball that is reduced in diameter from both sides of the cylinder. Therefore, the gas-liquid mixing chamber 120m has a circular sectional space throughout.

  The first truncated cone space 121f, the first cylindrical space 121g, the second truncated cone space 122f, the fourth cylindrical space 122g, and the third truncated cone space 122h have the same central axis. . The truncated surface of the second truncated cone space 122f has a larger diameter than the liquid supply hole 121e, and the bottom surfaces of the first truncated cone space 121f, the first cylindrical space 121g, and the second truncated cone space 122f. Have substantially the same hole diameter. Here, the fourth cylindrical space 122g functions as an ejection hole 122g from which the gas-liquid mixture is ejected.

  The gas supply path 120t supplies a gas that forms a spiral flow along the side periphery of the gas-liquid mixing chamber 120m from the side periphery of the bottom surface of the second truncated conical space 122f, and the supplied gas is The second frustoconical space 122f and the central axis are made the same to form a spirally rotating flow. Thereby, the gas which forms a spiral flow is supplied from the side periphery of the 2nd truncated cone space 122f along the side periphery of the 1st cylindrical space 121g.

  The inner wall of the gas-liquid mixing chamber 120m has a concavo-convex shape (for example, a so-called hull skin, the same as a ceramic sprayed skin, or a protrusion shape). These do not need to be applied to the entire inner wall, and may be formed only partially.

  Next, the operation of the bubble generation nozzle will be described. In addition to the bubble generation nozzle indicated by the solid line, FIG. 6 shows a liquid introduction pipe 123 connected to one end side of the bottomed member 121 of the bubble generation nozzle and the other end side of the cylindrical member 122 of the bubble generation nozzle. It is the figure which showed the connected gas-liquid mixture derivation | leading-out pipe | tube 124 and the gas introduction pipe | tube 125 connected to the gas supply hole 121d of the bottomed member 121 of a bubble production | generation nozzle with the broken line. The liquid introduction pipe 123 has an internal thread, and the internal thread is screwed with an external thread cut in the bottom 121 a of the bottomed member 121. The gas-liquid mixture outlet tube 124 is externally threaded, and the external thread is screwed into the internal thread cut in the third cylindrical space 121 i of the bottomed member 121. Further, the bottomed member 121 may be provided with a horizontal surface on the outer periphery so that the bottomed member 121 can be held by a spanner when screwed with these other tubes.

  The liquid introduction pipe 123 is connected to the storage unit 140 via a pump (not shown), and the liquid stored in the storage unit 140 is pressurized by the pump (hereinafter also referred to as “pressurized liquid”). )be introduced. In addition, the gas-liquid mixture outlet pipe 124 is connected to the bubble crushing section 130, and a first circulation path 170 is formed via a bubble generation nozzle. The gas introduction pipe 125 is connected to the gas introduction section 102 via a throttle valve (not shown), and a check is made in the gas introduction pipe 125 so that bubbles can be stably generated. A valve 126 is provided.

  First, pressurized liquid is supplied from the liquid introduction pipe 123 to the gas-liquid mixing chamber 120m through the liquid supply hole 121e. At this time, the pressurized liquid flows along a line connecting the liquid supply hole 121e, the first truncated conical space 121f, and the ejection hole 122g, and then a part of the pressurized liquid is ejected while expanding from the ejection hole 122g. Here, gas flows from the gas introduction pipe 125 into the gas-liquid mixing chamber 120m through the annular space 120s and the gas supply path 120t. The gas supplied from the gas supply path 120t into the gas-liquid mixing chamber 120m flows through the central axis in the gas-liquid mixing chamber 120m, spreads around the other end of the gas-liquid mixing chamber 120m, and is opposite to the flow of the central axis. A loop flow is formed that flows around the side of the gas-liquid mixing chamber in the direction of the flow and circulates again so as to return to the central axis at one end of the gas-liquid mixing chamber 120m. Further, since the gas-liquid mixing chamber 120m is a substantially cylindrical space, a high-speed loop flow can be easily formed, and the above-described operation can be easily obtained.

  Furthermore, the gas flowing in from the gas supply hole 121d is gas-liquid mixed from the gas supply path toward the first truncated conical space 121f of the gas-liquid mixing chamber 120m while being circulated around the central axis in the annular space 120s. It is supplied into the chamber 120m. Thereby, since the degree of vacuum in the gas-liquid mixing chamber 120m is improved, the amount of gas flowing in from the gas supply hole 121d can be further increased, and the generation of bubbles is promoted. By such a series of operations, fine bubbles such as microbubbles are continuously generated.

  Furthermore, since the gas supply path 120t is formed in a spiral shape around the central axis of the second truncated conical space 122f, the gas supplied from the gas supply path 120t is circular while circulating around the spiral shape. The flow along the circumferential surface of the space of the gas-liquid mixing chamber 120m having the cross-sectional shape is formed. Thereby, in the gas-liquid mixing chamber 120m, a screw-like loop flow rotating in the circumferential direction is formed. And since the concave-convex shape is formed on the inner wall of the gas-liquid mixing chamber 120m, the gas-liquid mixture, which is a fluid mixture of the liquid and gas that is in a high-speed loop flow, collides with the concave-convex shape, It is possible to further subdivide the gas in the gas-liquid mixing chamber 120m, accelerate the high-speed loop flow, and increase the degree of vacuum in the gas-liquid mixing chamber 120m.

  Further, the gas supplied from the gas supply path 120t is subdivided by the turbulent flow generated at the boundary between the gas supply path 120t and the gas-liquid mixing chamber 120m, and the first truncated conical space 121f and the second truncated cone are separated. When the loop flow accelerated by the conical space 122f is stirred and sheared and collides with the uneven shape of the inner wall of the gas-liquid mixing chamber 120m, and partly collides with the pressurized liquid supplied from the liquid supply hole 121e. The gas-liquid mixture is further subdivided by the generated turbulent flow, collides with the flowing-in external gas and / or external liquid at the jet hole 122g, and further refined, and includes fine bubbles such as bubbles or microbubbles. It is ejected from the second truncated conical space 122f as a bubble-containing liquid that is a body.

[Bubble collapsed part]

  FIG. 7 shows a schematic view of the bubble crushing portion 130, (A) shows a side view of the bubble crushing portion 130, and (B) shows a front view of the bubble crushing portion 130. The bubble crushing unit 130 includes a passage 131 that is connected to the bubble generation unit 120 and allows the bubble-containing liquid produced by the bubble generation unit 120 to pass therethrough, and an exterior body 132 that covers the periphery of the passage 131. 132 and a two-layer structure having an intermediate space 130s. The bubble crushing portion 130 is arranged so that the passage 131 extends in the horizontal direction.

  The exterior body 132 is made of stainless steel and extends in the shape of a hexagonal column having a regular hexagonal cross section, and a pair of disk-shaped planar members 135 that sandwich the side circumferential member 134 from both sides in the extending direction. Consists of. The passage 131 is fixed so that the passage 131 extends on the hexagonal central axis of the side peripheral member 134 by fitting the passage 131 in the center of both planar members 135. Accordingly, an intermediate space 130s is formed on the outside of the passage 131 and the side peripheral member 134 of the exterior body 132, and the outer periphery of the passage 131 and each surface of the hexagonal side peripheral member 134 have the same distance relationship. ing.

  The exterior body 132 has an ultrasonic transducer 133 attached to each surface of the hexagonal column. The ultrasonic transducers 133 are provided in two stages in the extending direction of the passage 131, the bubble generation unit 120 side being the preceding ultrasonic transducer group, and the storage unit 140 side being the subsequent ultrasonic transducer group. It is said. The ultrasonic transducer group at each stage is composed of six ultrasonic transducers 133 provided radially from the central axis of the passage 131. The two ultrasonic transducers 133 facing each other form a pair of transducers, and the six ultrasonic transducers 133 form three pairs of transducers. Each ultrasonic transducer can be adjusted in frequency and output by the control unit 199. In the present embodiment, the 12 ultrasonic transducers 133 irradiate ultrasonic waves with the same frequency and the same output, respectively.

  Each ultrasonic transducer 133 irradiates ultrasonic waves toward the passage 131. The intermediate space 130 s between the passage 131 and the exterior body 132 is filled with the propagation liquid, and the ultrasonic wave irradiated from the ultrasonic transducer 133 is propagated into the passage 131 through the propagation liquid and passes through the passage 131. Ultrasonic crushes the fine bubbles in the flowing bubble-containing liquid.

  The propagation liquid is cooling water supplied from the cooling unit 104, introduced into the intermediate space 130 s from the propagation liquid inlet 136 provided in the exterior body 132, and led out from the propagation liquid outlet 137. In the bubble crushing portion 130, the bubble-containing liquid that passes is heated by the ultrasonic irradiation of the ultrasonic vibrator. However, the propagating liquid also has an action of cooling the bubble crushing portion 130, and the temperature of the bubble-containing liquid passing through the bubble crushing portion can be adjusted by the flow rate of the cooling liquid.

  FIG. 8 shows a side cross-sectional view of the bubble crushing section 130 taken along the arrow 8-8 'in FIG. As shown in FIG. 8, the bubble crushing portion 130 is filled with a propagation liquid capable of propagating ultrasonic waves in an intermediate space 130 s formed by the passage 131 and the exterior body 132. In the present embodiment, the cooling water supplied from the cooling unit 104 is filled as the propagation liquid. The propagation liquid is introduced from a propagation liquid introduction port 136 provided below the planar member 135 of the exterior body 132 in the bubble crushing portion 130 disposed in a state where the passage 131 faces in the horizontal direction, and the planar surface of the exterior body 132 is obtained. It is derived from the propagation liquid outlet 137 provided on the upper side of the member 135. Thereby, in the intermediate space 130s, 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 130s.

  The ultrasonic wave irradiated from the ultrasonic vibrator 133 attached to the exterior body 132 is propagated to the passage 131 through the propagation liquid. At this time, if air remains in the intermediate space 130s, since the propagation rate of the ultrasonic wave in the propagation liquid and the air is different, the ultrasonic wave does not propagate evenly. Therefore, by leaving no air in the intermediate space 130 s, the ultrasonic waves can be propagated efficiently and uniformly into the passage 131. The bubble crushing unit 130 is provided with a temperature sensor (not shown), and can control the flow velocity of the propagation liquid while observing the heat generation state by the ultrasonic waves.

  In this embodiment, the passage 131 of the bubble crushing portion 130 is formed from a pipe made of PFA (polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), but other resin may be used as a material. However, it is also possible to use a metal that has no problem in terms of hygiene. In addition, the bubble crushing portion 130 has a two-layer structure including the passage 131 and the exterior body 132, but may have other configurations as long as the bubbles can be crushed by irradiation with ultrasonic waves. For example, a cylindrical member having a single-layer structure is formed of a metal such as stainless steel that does not have a sanitary problem even when a beverage is allowed to pass, and an ultrasonic vibrator is disposed directly around the cylindrical member. The beverage may be allowed to pass through the inside of the member.

  The bubble crushing unit 130 according to the embodiment of the present invention forms an ultrasonic crushing field, and crushes the fine bubbles in the liquid and converts them into ultrafine bubbles. The ultrasonic crushing field is formed by continuously irradiating ultrasonic waves, and ultraviolet rays are generated in the ultrasonic crushing field. Thereby, the liquid which passes an ultrasonic crushing field can acquire the bactericidal effect by an ultraviolet-ray.

  Furthermore, in the bubble crushing portion 130, an ultrasonic wave forming an ultrasonic crushing field is irradiated to the liquid, thereby generating innumerable vacuum bubbles by cavitation in the liquid. When this vacuum bubble collapses by repeated compression and expansion, an ultrahigh temperature and high pressure reaction field is formed. In this reaction field, the bactericidal effect of sterilizing general living bacteria, Legionella bacteria, Escherichia coli and the like can be obtained by breaking the cell walls of the bacteria by rupturing the vacuum bubbles.

  9 is a schematic view of the storage unit 140, FIG. 9A shows a plan view of the storage unit 140, FIG. 9B shows a front view of the storage unit 140, and FIG. A side view of the portion 140 is shown, and FIG. 9D shows a bottom view of the storage portion 140.

  As shown in FIG. 9, the storage unit 140 mainly includes a cylindrical tank container 141 and an exterior container 142 that covers the tank container 141. The tank container 141 forms a storage space 140s having a predetermined amount of volume for storing the bubble-containing liquid. A cooling space 140 t to which cooling water is supplied from the cooling unit 104 is formed between the tank container 141 and the outer container 142.

  The reservoir 140 further includes a stock solution inlet 143a connected to the homogenizer 110, a bubble-containing liquid inlet 143b connected to the bubble crusher 130, a recursive outlet 143c connected to the circulation path 170, A bubble-containing liquid outlet 143d connected to the extraction part 103, an outlet 143e connected to the outlet 106, a pressure outlet 143f connected to the pressure part 105, and a deaeration outlet (not shown) And a degassing inlet (not shown), which are provided in the tank container 141.

  The stock solution inlet 143a is formed of a cylindrical pipe and extends from the upper surface of the tank container 141 into the tank container 141, whereby the stock solution is supplied from the top of the storage space 140s. The pressurizing port 143f is formed of a cylindrical pipe, extends from the upper surface of the tank container 141 into the tank container 141, and applies the pressure from the pressurizing unit 105 into the storage space 140s of the tank container 141.

  The bubble-containing liquid introduction port 143b is mainly composed of a cylindrical pipe, extends from the upper surface of the tank container 141 to a half height position from the bottom surface in the tank container 141, and from above the tank container 141. Supply bubble-containing liquid. The pipe of the bubble-containing liquid introduction port 143b is bent in an L shape and discharges the bubble-containing liquid in the horizontal direction. Thereby, a bubble containing liquid receives a discharge pressure in a horizontal direction, and is stirred in the storage space 140s. However, since the bubble-containing liquid does not receive the discharge pressure in the vertical direction, it does not prevent the bubbles having a small particle diameter from being highly concentrated below the storage space.

  The recursive outlet 143c is mainly composed of a cylindrical pipe, extends from the bottom of the tank container 141 to a height position of ¼ from the bottom of the tank container 141, and ¼ from the bottom of the tank container 141. The bubble-containing liquid at the height position is led to the circulation path 170, and the bubble-containing liquid is supplied to the bubble generating unit 120. The pipe of the recursion outlet 143c is bent into an L shape and sucks the bubble-containing liquid in the horizontal direction. Thereby, the bubble-containing liquid receives suction pressure in the horizontal direction and is stirred in the storage space 140s. However, since the bubble-containing liquid does not receive the suction pressure in the vertical direction, it does not prevent the bubbles having a small particle diameter from increasing in concentration below the storage space.

  The bubble-containing liquid outlet 143d is formed of a cylindrical pipe and is a bottom valve provided at the bottom of the tank container 141, and takes out the bubble-containing liquid from the bottom of the tank container 141. The bubble-containing liquid outlet 143d is connected to the extraction unit 160 via a pressure reducing valve (not shown). Thereby, since the bubble-containing liquid pressurized in the storage space 140s is led out to the extraction part 103 while being decompressed via the pressure reducing valve, the highly concentrated bubble-containing liquid can be taken out. The extraction unit 103 functions as a bubble-containing liquid deriving unit. As the pressure reducing valve, a well-known direct acting pressure reducing valve, a pilot operated pressure reducing valve, or the like can be used.

  The discharge port 143e is mainly formed of a cylindrical pipe, extends from the bottom surface in the tank container 141 to the lower stage outside the tank container 141, and discharges the bubble-containing liquid from the bottom of the tank container 141.

  Here, the bubble-containing liquid tends to diffuse downward as the bubble size is smaller. Therefore, in the present embodiment, a UFB region where the presence of ultra fine bubbles is dominant is formed at the bottom of the tank container 141, and a UFB + MB region where ultra fine bubbles and micro bubbles are mixed is formed above it, On the upper side, an MB region in which the presence of microbubbles is dominant is formed. In each of these regions, the position in the tank container 141 varies depending on the amount of liquid stored and the operation status of the apparatus.

  Furthermore, the storage unit 140 is provided with a plurality of water level sensors, and the control unit 199 can manage the storage amount of the bubble-containing liquid in the storage unit 140. Furthermore, the storage unit 140 is provided with a pressure transmitter (not shown) for measuring pressure and a vent filter (not shown) that opens the storage space 140s in the tank container to atmospheric pressure.

  The pressure transmitter is provided in the tank container 141 and is electrically connected to the control unit 199, and the control unit 199 can measure the pressure in the storage space 140s. The vent filter is provided in the tank container 141, and is electrically connected to the control unit 199. The control unit 199 can adjust the pressure in the storage space 140s while securing a ventilation path from the storage space 140s.

  In the present embodiment, the tank container 141 is made of a stainless material such as SUS316 or SUS304. However, the tank container 141 is made of other metal such as stainless steel, resin such as PVC (polyvinyl chloride), PP (polypropylene), PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), quartz, or the like. It is good. In the case of a resin material, the tank container 141 has a completely sealed structure at the top by resin welding or adhesion, and a flange structure may be adopted in a metal material or a resin material. When quartz is used as a material, a sealed structure may be provided via a sealing material such as PTFE or Viton.

  Since the storage unit 140 has a sealed structure, the storage space 140s is isolated from the atmosphere, and the storage space 140s can be pressurized by the pressurization unit 105. Further, the pressure of the pressurized storage space 140s can be adjusted by the vent filter. The control unit 199 measures the pressure in the storage space 140s with a pressure transmitter, and the pressure in the storage space 140s is adjusted to a predetermined value by the pressurization unit 105 and the vent filter. In the present embodiment, the pressurizing unit 105 can pressurize the storage space 140s to about 0.6 MPa. Furthermore, the control unit 199 can manage the amount of cooling water supplied from the cooling unit 104 to the cooling space 140t and adjust the temperature of the bubble-containing liquid stored in the storage space 140s.

  In the bubble-containing liquid manufacturing system 100 according to the present embodiment, the bubble-containing liquid supply unit and the storage unit 140 that are configured by the bubble crushing unit 130 and the bubble generating unit 120 are separated. Accordingly, the bubble-containing liquid supply unit continuously supplies a certain amount of bubble-containing liquid having a uniform particle size without being affected by the capacity of the storage unit 140, and the bubble-containing liquid is stored in the storage unit 140. In the storage unit 140, bubbles are prevented from aggregating.

[Deaeration part]

  FIG. 10 is a schematic view showing a side cross section of a deaeration device constituting the deaeration unit 150. The deaeration unit 150 is incorporated in the second circulation path 180, and after the liquid is introduced from the storage unit 140 and degassed, the storage unit 140 is recirculated again. That is, the deaeration unit 150 is incorporated and connected in the second circulation path 180 that circulates the liquid stored in the storage unit 140.

  The deaeration device includes a casing 151 that forms a substantially cylindrical separation space 150 s, a rotary shaft member 152 that extends in the axial direction in the center of the separation space 150 s of the casing 151, and a separation impeller provided on the rotary shaft member 152. 153, an inducer 154, and a main impeller 155. The casing 151 includes an inflow path 156 that allows liquid to flow into the casing 151, an outflow path 157 that allows liquid to flow out of the casing 151, and a discharge path 158 that discharges gas from the casing 151. The rotating shaft member 152 is connected to the motor 159 and is rotatable.

  The deaeration device is incorporated and connected to the second circulation path 180, the inflow path 156 is connected to a degassing outlet (not shown) of the storage unit 140, and the outflow path 157 is degassed of the storage unit 140. It is connected to a care inlet (not shown). Further, the discharge path 158 is connected to a vacuum pump (not shown). The separation impeller 153, the inducer 154, and the main impeller 155 are each formed by providing a predetermined number of blade members having a predetermined shape attached to the rotary shaft member 152, and the rotary shaft member 152 rotates. By doing so, it functions as an impeller that separates the liquid and the airframe by centrifugal force.

  In the deaeration process, the liquid stored in the storage unit 140 first flows into the inflow path 156 of the deaeration unit 150 via the second circulation path 180 in a state where the rotating shaft member 152 is rotated. Here, the inflow path 156 has a throttling structure, and once the inflowing liquid is squeezed, it is opened. As a result, the liquid flowing into the casing 151 is depressurized, and the gas dissolved in the liquid is precipitated by the depressurizing action, and is led to the inducer 154 as a gas-liquid mixture.

  The gas-liquid mixture guided to the inducer 154 is a function of the impeller of the inducer 154 due to the rotation of the rotary shaft member 152, and the liquid component is accumulated on the outer peripheral side in the casing 151, while the gas component is collected in the casing. 151 is accumulated on the center side (rotating shaft member 152 side) in 151 and separated into a liquid component and a gas component. Furthermore, since the inside of the casing 151 is depressurized by the vacuum pump described above, the gas remaining in the liquid is deposited and separated as bubbles at the boundary between the liquid and the gas.

  The liquid from which the gas component has been separated is guided to the main impeller 155 and receives a further outward force by the rotation of the main impeller 155, thereby forming a flow path toward the outflow passage 157 provided outside the casing 151. To do. On the other hand, the gas separated from the liquid forms a flow path toward the discharge path 158 by suction of the vacuum pump. At this time, a part of the liquid is drawn to the vacuum pump side by the suction force of the vacuum pump, but is retreated to the outside of the casing 151 by the function of the impeller of the separation impeller 153. The retracted liquid is guided again toward the inducer 154 through the outside of the casing 151.

  Thus, in the deaeration device, the liquid flowing in from the inflow path 156 is separated into the liquid component and the gas component, the gas is discharged from the discharge path 158, and the liquid from which the gas component has been separated is taken out from the outflow path 157. Thereby, the deaeration device can deaerate the liquid.

  The deaeration unit 150 is a so-called inducer-type gas-liquid separation device (deaeration device) that can separate gas and liquid by centrifugal force of an impeller attached to a rotating shaft member that rotates in a casing. (For example, see Japanese translations of PCT publication No. 2004/058380). Such an impeller-type deaerator can be continuously degassed, so that batch processing like a deaerator by heating or decompression is unnecessary. Further, the problem due to the pressure environment is solved as in other centrifugal separation devices.

  Therefore, it is suitable for cooperating with an apparatus capable of adjusting the pressure of the liquid and requiring continuous processing, such as the bubble generation unit 120, the bubble crushing unit 130, and the storage unit 140 according to the present embodiment. However, the deaeration unit 150 may be configured by other devices such as other pressurization devices, decompression devices, and centrifugal separation devices as long as the gas contained in the liquid, particularly dissolved oxygen, can be degassed. Moreover, the deaeration part 150 acts also as a deaeration part by removing a gaseous component from a liquid.

  In the bubble-containing liquid manufacturing system 100 according to the present embodiment, the liquid introduction unit 101 is connected to the storage unit 140 via the homogenization unit 110. The gas introduction unit 102 is connected to the homogenization unit 110 and the bubble generation unit 120. The storage unit 140 is incorporated in the first circulation path 170 and connected to the bubble generation unit 120, the bubble generation unit 120 is connected to the bubble collapse unit 130, and the bubble collapse unit 130 is connected to the storage unit 140. Yes. That is, in the first circulation path 170, the liquid introduced from the liquid introduction unit 101 is introduced into the storage unit 140, and returns to the storage unit 140 again via the bubble generation unit 120 and the bubble crushing unit 130. Is formed.

  However, the bubble-containing liquid manufacturing system may have other configurations, and for example, liquid and gas may be introduced into the homogenizing unit via the bubble generation nozzle according to the present invention.

[Second Embodiment]

  A bubble-containing liquid production system 200 according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 11 shows a functional block diagram of the bubble-containing liquid production system 200. The bubble-containing liquid manufacturing system 200 according to the second embodiment does not include a bubble crushing unit, the bubble generation unit 220 is connected to the storage unit 240 without the bubble crushing unit, and the configuration of the storage unit 240. And the bubble-containing liquid production system 100 according to the first embodiment. In the following description, only different portions of the bubble generation units 120 and 220 according to the first and second embodiments will be described in detail, and description of similar portions will be omitted.

  Since the bubble-containing liquid manufacturing system 200 does not include a bubble crushing part, the bubble-containing liquid generated by the bubble generation part 220 is directly introduced into the storage part 240. The storage unit 240 includes a plurality of ultrasonic transducers 2424, and ultrasonically collapses the bubble-containing liquid introduced from the bubble generation unit 220 to convert it into ultrafine bubbles.

  Next, the storage unit 240 will be described with reference to FIGS. 12 and 13. In the description of the storage unit 240, the description overlapping with the storage unit 140 is partially omitted. 12A shows a plan view of the reservoir 240, and FIG. 12B shows a cross-sectional view taken along the line BB of FIG. 12A.

  As shown in FIG. 12B, the storage unit 240 mainly includes a cylindrical tank container 2431 and an exterior container 2437 that covers the tank container 2431. The tank container 2431 forms a storage space 2439 having a predetermined volume for storing the bubble-containing liquid. In addition, a cooling space 2494 is formed between the tank container 2431 and the outer container 2437, and cooling water is supplied from the cooling unit 204 via the cooling water inlet 291 and is supplied to a cooling water outlet (not shown). More cooling water is derived.

  The tank container 2431 and the exterior container 2437 are made of stainless steel, and the tank container 2431 has a sealed structure. Thereby, the trace gas generated at the time of ultrasonic crushing does not come into contact with the atmosphere. Furthermore, since the tank container 2431 has a sealed structure, the pressure in the storage unit 240 can be controlled.

  The storage unit 240 also includes a plurality of ultrasonic transducers 2424 attached to the tank container 2431 from the outside of the side peripheral surface. In the present embodiment, the storage unit 240 includes eight ultrasonic transducers 2424 arranged at the same angle at the same angle on the side peripheral surface. Each ultrasonic transducer 2424 irradiates ultrasonic waves toward the center of the tank container 2431. The ultrasonic transducer 2424 is provided in the tank container 2431 and directly irradiates the bubble-containing liquid stored in the tank container 2431 with ultrasonic waves.

  The two ultrasonic transducers 2424 facing each other form a pair of oscillators, and the eight ultrasonic transducers 2424 form four pairs of oscillators to form an ultrasonic crushing field in the center of the tank container 2431. Each ultrasonic transducer can be adjusted in frequency and output by the control unit 199. In the present embodiment, the four ultrasonic transducers 2424 irradiate ultrasonic waves with the same frequency and the same output, respectively.

  As shown in FIGS. 12A and 12B, the reservoir 240 further includes a beverage inlet 2432 connected to the liquid inlet 201 and a bubble-containing liquid inlet connected to the bubble generator 220. 2433, a recursive outlet 2434 connected to the circulation path 270, a bubble-containing liquid outlet 2435 connected to the outlet 160, a outlet 2436 connected to the outlet 203, and the pressurizer 205. And a pressurizing port 2438, which are provided in the tank container 2431.

  In FIG. 12, a cleaning liquid inlet 2499 used for stationary cleaning (CIP: Cleaning In Place) is shown, but is normally closed and used for cleaning the tank when the apparatus is stopped. The cleaning liquid inlet 2499 introduces the cleaning liquid into the tank container 2431 through the shower ball 2499a.

  The beverage introduction port 2432 is formed of a cylindrical pipe, and is bent into a dogleg shape at an angle of about 30 °, and the tip is cut in the vertical direction, similarly to the pipe of the bubble-containing liquid introduction port 2433 described later. Has been. As a result, the stock solution is ejected in the horizontal direction while causing a discharge port (not shown) for discharging the stock solution along the side surface of the storage space 2439, and the stock solution is ejected toward the side surface. By discharging the stock solution supplied from the liquid introduction unit 201 along the side surface of the storage space 2439, the bubble-containing liquid is introduced along the side surface of the storage space 2439, and the beverage is suppressed from foaming. The

  The pressurizing port 2438 is mainly composed of a cylindrical pipe, communicates from the upper surface of the tank container 2431 to the top surface in the tank container 2431, and a desired gas such as carbon dioxide gas or nitrogen gas from the pressurizing unit 205. Is supplied into the storage space 2439 of the tank container 2431 and pressurized. The reservoir 240 can store the liquid in a state where the reservoir 240 is pressurized.

  The bubble-containing liquid inlet 2433 is mainly composed of a cylindrical pipe 2433a, extends from the upper surface of the tank container 2431 to a height position of 2/3 from the bottom surface in the tank container 2431, and extends from the bubble generator 220 to the second position. 2 bubble-containing liquid is supplied from the upper side of the tank container 2431.

  As shown in FIG. 13, the pipe 2433a of the bubble-containing liquid introduction port 2433 is bent into an angle of about 30 ° in a dogleg shape, and the tip is cut in the vertical direction. Accordingly, the bubble-containing liquid is discharged in the horizontal direction while the discharge port 2433b for discharging the bubble-containing liquid is along the side surface of the storage space 2439, and the bubble-containing liquid is discharged toward the side surface. By discharging the bubble-containing liquid along the side surface of the storage space 2439, the bubble-containing liquid is introduced along the side surface of the storage space 2439, and foaming is suppressed.

  The recursion outlet 2434 is mainly formed of a cylindrical pipe, and extends in the horizontal direction from the side of the tank container 2431 at a height of 1/3 from the bottom of the tank container 2431 and communicates with the tank container 2431. Then, the bubble-containing liquid at a height of 1/3 from the bottom of the tank container 2431 is led to the circulation path 270, and the bubble-containing liquid is returned to the bubble generation unit 220.

  The pipe of the recursion outlet 2434 sucks the bubble-containing liquid in the horizontal direction. As a result, the bubble-containing liquid receives suction pressure in the horizontal direction and is stirred in the storage space 2439. However, since the bubble-containing liquid does not receive the suction pressure in the vertical direction, it does not prevent the bubbles having a small particle diameter from increasing in concentration below the storage space.

  The bubble-containing liquid outlet 2435 is mainly composed of a cylindrical pipe, and extends from the bottom of the tank container 2431 to the outside of the tank container 2431 in the same manner as the storage unit 140, and takes out the bubble-containing liquid from the bottom of the tank container 2431. . The discharge port 2436 mainly includes a cylindrical pipe, extends from the bottom surface in the tank container 2431 to the outside of the tank container 2431, and discharges the bubble-containing liquid from the bottom of the tank container 2431.

  Since the storage unit 240 has a sealed structure, the storage space 2439 is isolated from the atmosphere, and the storage space 2439 can be pressurized by the pressurization unit 205. In the present embodiment, the pressurizing unit 205 can pressurize the storage space 2439 to about 0.6 MPa. Further, even when the pressurizing unit 205 is not operated, the storage unit 240 is pressurized from the atmospheric pressure by about 0.01 MPa to 0.05 MPa by the bubble-containing liquid pumped from the bubble generating unit 220.

  The storage unit 240 further includes a pressure reducing port 2498a provided on the upper surface of the tank container, and communicates with the outside through a vent filter to secure an air passage from the storage space 2439. An opening / closing valve (not shown) is provided between the vent filter and the pressure reducing port 2498a, and the control unit 199 adjusts the opening degree of the opening / closing valve, thereby enabling pressure adjustment in the storage space 2439. The control unit 199 measures the pressure in the storage space 2439 with a pressure transmitter, and the pressure in the storage space 2439 is adjusted to a predetermined value by the pressurization unit 205 and the vent filter.

  Furthermore, the storage unit 240 includes a stirrer K that stirs the liquid stored in the tank container 2431. The stirrer K includes a motor K1 provided above the tank container 2431, a shaft K2 connected to the motor K1, and a stirring blade K3 attached to the shaft K2. The motor K1 is connected to the control unit 199, and the driving timing is controlled.

  Here, the liquid containing fine bubbles or ultrafine bubbles has a characteristic that bubbles are easily formed as compared with a liquid not containing fine bubbles, and the characteristic becomes remarkable in a liquid having a colloidal component such as milk. Therefore, in the introduction and storage of the bubble-containing liquid, if the bubble-containing liquid is bubbled when being introduced into the storage unit 240, the bubble concentration is lowered and it is difficult to take out stably.

  In the storage unit 240 according to this modification, the discharge port 2433b of the bubble-containing liquid inlet 2433 is formed along the side surface of the storage space 2439, and the bubble-containing liquid inlet 2433 supplies the bubble-containing liquid in the horizontal direction in the tank container 2431. Discharge towards the side of the. As a result, the bubble-containing liquid is introduced into the storage space 2439 along the side peripheral surface of the tank container 2431, and can be stored while suppressing foaming.

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

100 Bubble-containing liquid production system 120 Bubble generation unit (bubble generation nozzle)
121 bottomed member 121a bottom 121b first side wall 121c second side wall 121d gas supply hole 121e liquid supply hole 121f first truncated conical space 121g first cylindrical space 121h second cylindrical space 121i third Cylindrical space 122 cylindrical member 122a first side peripheral portion 122b second side peripheral portion 122c first side peripheral region 122d second side peripheral region 122e third side peripheral region 122f second truncated conical space 122g Fourth cylindrical space 122h Third truncated conical space 130 Bubble crushing portion 140 Reserving portion

Claims (10)

A substantially annular bottomed member having the first direction as an axial direction;
A substantially annular cylindrical member fitted into the bottomed member from the axial direction,
The bottomed member includes an annular side wall part that forms a cylindrical columnar space, and a bottom part that is continuous with the side wall part and forms a first frustoconical frustoconical space,
The bottom portion of the bottomed member has a columnar liquid supply hole continuous to the first truncated conical space,
The first truncated conical space is continuous with the cylindrical space at the bottom of the truncated cone, and is continuous with the liquid supply hole at the truncated surface;
The cylindrical member includes an annular first side peripheral portion that forms a frustoconical second frustoconical space, and a cylindrical ejection hole having a diameter larger than that of the liquid supply hole in the bottom portion. An annular second side periphery to be formed,
The first side peripheral portion of the cylindrical member has a plurality of recesses that open to the outside in the radial direction and extend spirally in the first direction,
The second truncated conical space of the cylindrical member is continuous with the ejection hole at the truncated surface,
By fitting the cylindrical member into the bottomed member, the first truncated conical space, the columnar space, and the second truncated conical space form a gas-liquid mixing chamber, and the recess is Communicating with the gas-liquid mixing chamber,
A bubble generation nozzle that is supplied with liquid through the liquid supply hole and supplied with gas through the recess. The second side peripheral portion of the tubular member further forms a truncated cone-shaped third truncated cone space,
2. The bubble generation according to claim 1, wherein the third truncated conical space continues from the opposite side of the second truncated conical space at the truncated surface to the ejection hole of the second side peripheral portion. nozzle.   The bubble generating nozzle according to claim 1 or 2, wherein the plurality of concave portions provided in the first side peripheral portion are formed at equal intervals in the circumferential direction. A first truncated conical space having a truncated cone shape, a columnar cylindrical space that is continuous with the first truncated cone space at the bottom surface of the truncated cone, and opposite to the first truncated cone space A gas-liquid mixing chamber consisting of a truncated cone-shaped second truncated conical space continuous from the bottom to the cylindrical space,
The first truncated cone space, the cylindrical space, and the second truncated cone space have the same central axis,
The truncated surface of the second truncated cone space is larger than the truncated surface of the first truncated cone space;
Liquid is supplied to the gas-liquid mixing chamber from a truncated surface of the first truncated conical space,
A gas forming a spiral flow along the side circumference of the cylindrical space is supplied from the side circumference of the bottom surface of the second truncated cone space;
A bubble generation nozzle in which a gas-liquid mixture obtained by mixing liquid and gas in the gas-liquid mixing chamber is ejected from a truncated surface of the second truncated conical space. A plurality of gas supply paths are formed on the outside of the side surface of the second truncated conical space and are spirally spaced at equal intervals that rotate with the same central axis as the second truncated conical space. ,
The bubble generating nozzle according to claim 4, wherein a gas forming a spiral flow is supplied from the outer periphery of the second truncated conical space along the outer periphery of the cylindrical space via the gas supply path. Further, a cylindrical ejection hole continuing to the truncated surface of the truncated cone in the second truncated cone space, and a second continuous from the side opposite to the second truncated cone space to the ejection hole on the bottom surface. 3 frustoconical spaces,
The bubble-containing liquid ejected from the truncated surface of the second truncated conical space is ejected from the truncated surface of the third truncated conical space toward the bottom surface through the ejection hole. The bubble generation nozzle of Claim 4 or Claim 5. A gas-liquid mixing chamber having a circular cross-sectional space and forming a loop flow;
A liquid supply hole provided on one end side of the gas-liquid mixing chamber and supplying pressurized liquid to the gas-liquid mixing chamber;
A gas supply hole into which gas flows,
Provided on the other end side of the gas-liquid mixing chamber, while the gas flowing in from the gas supply hole spirally circulates around the central axis of the liquid supply hole, around the space of the gas-liquid mixing chamber A gas supply path for supplying the gas-liquid mixing chamber along one end side of the gas-liquid mixing chamber,
Provided at the other end of the gas-liquid mixing chamber so as to coincide with the central axis of the liquid supply hole, and has a hole diameter larger than the hole diameter of the liquid supply hole, and the liquid and gas are mixed in the gas-liquid mixing chamber A bubble generating nozzle comprising: an ejection hole for ejecting the bubble-containing liquid.   The bubble generation nozzle according to claim 7, wherein the gas supply path includes a plurality of spiral concave portions extending from the other end side to the one end side and provided at equal intervals. Having a frustoconical space continuous at the fringe surface at the spout,
The bubble generating nozzle according to claim 7 or 8, wherein the bubble-containing liquid is ejected while being decompressed by discharging from the truncated surface of the third truncated conical space toward the bottom surface. The bubble generation nozzle according to claim 1,
A bubble crushing section connected to the bubble generation nozzle, and ultrasonically crushing the fine bubbles generated from the bubble generation nozzle to generate ultrafine bubbles;
In addition, a reservoir that is connected to the bubble collapse portion and stores the ultrafine bubble-containing liquid collapsed by the bubble collapse portion,
The said storage part is connected to the said bubble production | generation nozzle, The bubble containing liquid manufacturing system which makes the said bubble production | generation nozzle recurs the stored ultrafine bubble containing liquid.

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