JP2008168293A - Microbubble generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microbubble generator generating microbubbles with a uniform bubble size. <P>SOLUTION: The microbubble generator is provided with a dissolved water manufacturing means manufacturing gas dissolved water with gas dissolved in water, and a bubble generating nozzle 49 generating microbubbles from the dissolved water supplied from the dissolved water manufacturing means. The dissolved water manufacturing means is provided with a pump 11 for mixing water with air to form mixed water, and a gas dissolving device 27 for dissolving gas. The gas dissolving device 27 is provided with a flow-in port 33 provided at an upper part of a sealed vessel 29 and dipped in a slightly lower position from the level of the mixed water flowing from the pump 11 in the vessel 29, and a discharge valve 37 discharging surplus gas in the mixed water at an upper end part of the vessel 29. A flow-out port 43 provided near the bottom of the vessel 29 is directed downward near to the bottom 29B of the vessel 29 in a region of low flow speed of water from the flow-in port to the flow-out port, in order to suck water with small non-dissolved bubbles removed by floating up small bubbles not dissolved in the mixed water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a microbubble generator for generating microbubbles having a particle size of about 1 μm to 50 μm.

  The microbubble generator, for example, sucks water in a water tank by a pump, and pressurizes air into the water pumped by the pump to produce a mixed liquid in which water and air are mixed. Is introduced into a gas dissolving apparatus to produce dissolved water from which excess air is discharged. And the melt | dissolved gas is generated as a fine bubble by discharging the said dissolved water in a water tank through a nozzle (for example, refer patent document 1).

The dental gargle water supply device is configured to stop water injection by detecting the weight of predetermined water injected into a paper cup (see, for example, Patent Document 2).
JP 2003-265938 A JP-A-6-304192

  The gas dissolving apparatus in the microbubble generator described in Patent Document 1 includes a partition plate extending from the lower part to the vicinity of the upper end part in a sealed container, whereby the first and second stirring / mixing paths are formed in the container. It is configured. And the mixed water which mixed water and air flows in from the inlet provided in the lower part of the said 1st stirring and mixing channel, gets over the said partition plate, and the mixed water which flowed into the 2nd stirring and mixing channel Is configured to flow out from an outlet provided in the lower part of the second stirring / mixing path. In order to discharge excess air in the mixed water, an air vent valve is provided at the top of the container.

  In the above-described configuration, dissolved water in which air is dissolved in water can be produced. However, in the container, the first stirrer / mixer rapidly rises from the inlet due to an upward flow caused by the buoyancy of excess air. A flow occurs. And, since the inside of the container is maintained at a pressure higher than the atmospheric pressure, it floats in the water flow that goes over the partition plate and descends in the second stirring / mixing path to the lower outlet. Without being discharged, it may be discharged from the outlet while containing small bubbles carried by the water flow. Moreover, since it is a structure provided with a partition plate in a container, a structure is complicated and it is comparatively large sized.

  Therefore, when discharging the dissolved water from the nozzle to generate fine microbubbles, bubbles having an extremely large particle size may be generated as compared to the microbubbles, so that the particle size of the fine microbubbles is made uniform. Further improvement has been demanded for downsizing.

  Moreover, in the dental gargle water supply device, it is desired not only to supply water but also to have a sterilizing function.

  The present invention has been made in view of the above-described problems. Dissolved water production means for producing dissolved water in which a gas is dissolved in water, and microbubbles from dissolved water supplied from the dissolved water production means. A bubble generating nozzle for generating, the dissolved water producing means includes a pump for mixing water and gas to form mixed water, and a gas dissolving device for dissolving gas, and the gas dissolving The apparatus includes an inlet provided in an upper part of a sealed container so as to be immersed in a slightly lower position from the upper surface of the mixed water introduced from the pump in the container, and to discharge excess gas in the mixed water. The outlet provided for the upper end portion of the container and the vicinity of the bottom portion of the container is a state in which the small bubbles that are not dissolved by floating the small bubbles that are not dissolved in the mixed water are removed. Inhale water Because the, is characterized in that are facing down close to the bottom of the container in the region where the water flow rate is slow leading to the outlet from the inlet.

  According to the present invention, excess gas in the dissolved water can be sufficiently removed, and when the dissolved water is discharged from the nozzle to generate fine bubbles, the particle diameter of the bubbles becomes substantially uniform. is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a microbubble generator 1 according to an embodiment of the present invention includes a portable casing 3. The casing 3 includes a lid member 7 that can be opened and closed with respect to a box-shaped casing body 5, and a pump 11 that is driven to rotate by a small motor 9 is mounted in the casing body 5. It is. The pump 11 is composed of an appropriate pump such as a vortex pump or a cascade pump. The suction port 13 of the pump 11 is connected to a water source 17 such as a water storage tank 17 storing water or a water supply via a suction path 15. Connected.

  In order to mix air with water sucked by the pump 11 to obtain mixed water (mixed liquid), a gas suction path 19 for sucking outside air is branched in the middle of the suction path 15. . As a configuration for sucking outside air (air) from the gas suction path 19 into the suction path 15, a negative pressure is generated in the suction path 15 due to the suction action of the pump 11. This can be easily implemented with a configuration in which 19 is connected.

  When ozone is to be dissolved in water, an ozone supply means 21 may be connected to the gas suction path 19. As this ozone supply means 21, it can be set as the structure which discharges in air, or the cylinder which stored ozone. The ozone supply means 21 may be connected to the suction passage 15 in parallel with the gas suction passage 19.

  The discharge port 23 of the pump 11 is connected to a gas dissolving device 27 through a connection path 25. The gas dissolving device 27 constitutes the dissolved water production means together with the pump 11 and the like, and includes a hermetically sealed container 29. An inflow pipe 31 connected to the connection path 25 is provided at a position on the upper side of the sealed container 29. An inner end portion (inlet) 33 of the inflow pipe 31 faces downward and is slightly below the water surface 35 stored in the sealed container 29.

  Further, a discharge valve 37 for discharging excess gas in the liquid mixture (mixed water) that has flowed into the sealed container 29 by the pump 11 is provided on the upper part of the sealed container 29. The discharge valve 37 has a function of discharging excess gas (air) from the upper part of the sealed container 29 and also has a function of maintaining the pressure in the sealed container 29 at a predetermined pressure higher than the atmospheric pressure. . The discharge valve 37 is composed of a check valve or the like having a valve body 39 such as a ball, and the pressure inside the sealed container 29 is greatly reduced at the exhaust hole of the check valve. It is formed in a fine hole so that there is no.

  In the vicinity of the bottom (bottom surface) 29B of the sealed container 29, an outflow pipe 41 for flowing out the dissolved water in the sealed container 29 to the outside is provided. The inlet (outlet) 43 of the outflow pipe 41 is directed to the lower side close to the bottom surface of the sealed container 29, and between the bottom 29 </ b> B of the sealed container 29 and the inlet 43 of the outflow pipe 41. Are provided with a slight interval of about several mm. A region of a gentle flow between the inner end (inlet) 33 of the inflow pipe 31 and the outflow pipe 41 and in which the flow rate of water from the inflow port 33 to the outflow pipe 41 becomes extremely slow. A staying area is formed.

  In other words, the staying region is a region in which the water flowing into the sealed container 29 from the inflow port 33 is substantially retained, and the dynamic water flow when the inflowing port 33 flows. This is a region where the momentum is relaxed and the stagnation mode of the static flow is temporarily set, and the water in the staying region is discharged to the outside through the outflow pipe 41.

  With the above configuration, large bubbles in the mixed water that flowed into the sealed container 29 from the inlet 33 of the inlet pipe 31 immediately rise and rise from the portion of the inlet 33. Therefore, the upward flow of water due to the presence of large bubbles in the mixed water is a portion on the upper side from the inlet 33, and does not affect the vicinity of the bottom of the sealed container 29.

  Further, since the outlet 43 of the outflow pipe 41 is disposed near the bottom 29B of the sealed container 29 and is disposed downward and close to the bottom surface 29B, the outlet 43 flows from the water surface in the sealed container 29. The height dimension leading to the outlet 43 can be increased as much as possible, and the time for a small bubble that is not dissolved in water, for example, having a particle size of about 0.08 mm or more to rise, can be earned more. And in the outflow port 43, the water of the quiet relaxed flow after contacting the bottom face 29B of the airtight container 29 is attracted | sucked.

  Therefore, most of the large bubbles are lifted and removed at the top, and smaller bubbles are gradually lifted and removed in the process of the mixed water reaching the bottom 29B. Then, for example, a small bubble having a particle size of about 0.08 mm, which has moved down in a gentle flow without rising, comes into contact with the bottom surface and rises and is removed by the reaction at that time. Some of the small bubbles may adhere to the bottom surface. Then, when the next small bubble comes into contact with the attached bubble, the attachment is released by the stimulus at that time, and the surface is lifted and removed.

  That is, immediately before flowing into the outlet 43, the small bubbles that do not dissolve are removed by bringing the mixed water into contact with the bottom surface. With the above configuration, the outflow port 43 can be disposed almost directly below the inflow port 33, and the overall configuration can be downsized.

  A bubble generating nozzle 49 is connected to the outflow pipe 41 through a connection path (connection pipe) 47. As shown in FIG. 2, the nozzle 49 includes a nozzle body 51 to which the connection pipe 47 is connected. A bubble generating cartridge 55 is detachably attached to a communication hole 53 communicating with the connection pipe 47 in the nozzle body 51.

  More specifically, as shown in FIG. 2, the bubble generating cartridge 55 includes a cylindrical cartridge body 57 having one end side closed by a wall portion and the other end side opened. Inside, a fine mesh member 59 and an orifice 61 having an appropriate number of small holes are sequentially inserted from the opening on the other end side of the cartridge main body 57 and screwed into a ring-shaped nut, snap ring or the like. It is detachably fixed by a ring-shaped fixture 63. A pressure release chamber 65 is provided between the one end side wall portion of the cartridge body 57 and the mesh member 59, and a plurality of through holes 67 are formed in the peripheral wall of the pressure release chamber 65. is there.

  One end side of the cartridge body 57 protrudes from the communication hole 53 in the nozzle body 51 into a stirring chamber 69 formed of a large-diameter hole formed in the nozzle body 51, and the through-hole 67 of the cartridge body 57. Is in communication with the stirring chamber 69.

  In the above configuration, when the motor 9 is driven and the pump 11 is rotationally driven, water in the water storage tank 17 is sucked through the suction passage 15 and air is sucked through the gas suction passage 19. When an ozone cylinder is connected to the gas suction path 19, ozone is sucked.

  Water such as water and air sucked into the pump 11 are mixed by stirring in the pump 11, and a part of the air is dissolved in water, and then into the sealed container 29 in the gas dissolving device 27 from the inlet 33 of the inlet pipe 31. It is jetted in the downward direction. In the vicinity of the upper part in the sealed container 29, the water in the upper part is agitated by the jetted water to dissolve the air. At this time, excess air that does not dissolve in water floats and concentrates on the water surface 35 in the sealed container 29 and is discharged to the outside through the discharge valve 37. That is, the rapid upward flow resulting from the floating of air in the water as large bubbles is generated in the upper part from the inlet 33. In addition, the pressure in the said airtight container 29 is always hold | maintained in high pressure rather than external pressure.

  In the vicinity of the bottom 29B of the closed vessel 29, a static staying mode that is not stirred by the water flowing in from the inflow pipe 31, that is, undissolved bubbles having a particle size of about 0.08 mm or more are levitated. The flow is relaxed to such an extent that it does not flow into the inflow pipe 31. Then, the dissolved water near the bottom 29B is supplied from the outflow pipe 41 to the bubble generation nozzle 49 through the connection pipe 47.

  Since the outlet 43 of the outflow pipe 41 is directed downward (bottom side) at a position away from the bottom 29B of the sealed container 29 by about several millimeters, the water flowing into the outlet 43 passes through the bottom of the sealed container 29. It comes into contact with and comes into contact with 29B. Accordingly, when water in a saturated state comes into contact with the bottom portion, small bubbles having a particle size of, for example, about 0.08 mm or more that have flown near the bottom without floating are brought into contact with the bottom portion 29B and lifted and removed by the reaction. . Further, some of the small bubbles attached to the bottom portion 29B are lifted and removed by stimulation by the next small bubble contact.

  Therefore, the saturated water flowing into the outlet 43 is in a state in which excess air consisting of small undissolved bubbles is removed. Therefore, the saturated water flowing in from the outlet 43 is in an appropriate saturated state without including small bubbles that are not dissolved.

  When the dissolved water flowing into the nozzle 49 from the connecting pipe 47 passes through the small hole of the orifice 61, the pressure is released, so that the gas (air) dissolved in the dissolved water is generated as fine bubbles. The generated fine bubbles are further refined by the mesh member 59 and are injected into the pressure release chamber 65. Since the pressure of the dissolved water is further released in the pressure release chamber 65, the dissolved gas is further generated as fine bubbles and is further refined by colliding with a wall portion on one end side of the pressure release chamber 65. The

  Then, the dissolved water sprayed from the pressure release chamber 65 through the through hole 67 to the stirring chamber 69 further receives pressure release to further generate fine bubbles, and is further refined by the stirring action to have a particle size. It becomes a microbubble of about 1 μm to 50 μm and is ejected to the outside.

  As already understood, the dissolved water supplied from the gas dissolving device 27 to the nozzle 49 is in a state in which excess air that has not been dissolved is removed, and is transferred along the flow of water without being dissolved. Since no microbubbles (for example, a particle size of 0.08 mm or more) are included, almost uniform microbubbles can be generated. Therefore, the microbubbles do not rise following the rising of the bubbles having a relatively large particle size, the time for the microbubbles to float in the water can be lengthened, and the effect of the microbubbles can be maintained. Is.

  The dental gargle water supply device using the microbubble generator having the above-described configuration includes the ozone supply device 21, the nozzle 49 at the bottom, and a cup of microbubble gargle water 75 generated from the nozzle 49. A transparent container 79 having a supply port 77 for supplying to (not shown) is provided.

  In the above configuration, when the microbubble generator 1 is driven, microbubbles containing ozone are generated from the nozzle 49 into the container 79. When microbubbles having a particle size of about 1 μm to 50 μm are generated in the container 79, the inside of the container 79 becomes milky white, and generation of microbubbles can be confirmed from the outside. When gargling, a phenomenon occurs in which ultrasonic waves are generated when the microbubbles burst, and the microbubbles are shrunk by the self-pressurizing effect and collapse when they become smaller and disappear. In this crushing phenomenon, an adiabatic compression action is applied, and therefore, an area of several thousand degrees and several thousand atmospheres is formed in a very small area. Then, free radicals such as -OH are generated in this minute region. That is, by using the above-mentioned ultra-high temperature and free radicals, various chemical substances in the aqueous solution can be decomposed, and the oral cavity can be effectively cleaned. Moreover, sterilization in the oral cavity can be performed by the presence of ozone.

It is a conceptual and schematic explanatory drawing of the microbubble generator which concerns on embodiment of this invention. It is sectional explanatory drawing of a nozzle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 Motor 11 Pump 17 Water tank 23 Discharge port 27 Gas dissolution apparatus 29 Sealed container 31 Inflow pipe 33 Inner end (inlet)
35 Water surface 37 Discharge valve 41 Outflow pipe 43 Inlet 49 Bubble generating nozzle 51 Nozzle body 55 Bubble generating cartridge 57 Cartridge body 59 Net member 61 Orifice 65 Pressure release chamber 69 Stir chamber

Claims (1)

  Dissolved water production means for producing dissolved water in which a gas is dissolved in water, and a bubble generation nozzle for generating microbubbles from the dissolved water supplied from the dissolved water production means, the dissolved water production means Comprises a pump for mixing water and gas into mixed water, and a gas dissolving device for dissolving gas, and the gas dissolving device has an inlet provided at the top of a sealed container. An upper portion of the container, and a discharge valve for discharging excess gas in the mixed water is provided at the upper end of the container. The outlet provided in the vicinity of the bottom portion is a water that reaches from the inlet to the outlet in order to suck in water in a state in which small bubbles that are not dissolved in the mixed water are lifted and small bubbles that are not dissolved are removed. The flow rate is slow Microbubble generating apparatus characterized by that is toward the lower side in proximity to the bottom surface of the container in the region.