JP2010264390A - Fine air bubble generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fine air bubble generator capable of more effectively generating air bubbles of a micro size or a nano size in a liquid that passes on. <P>SOLUTION: The fine air bubble generator 1 configured by a case 21 having a bottom that comparts a cylindrical reforming spacing 22, a vibrating plate 11 provided so as to block an opening side of the case 21, and an ultrasonic vibrator unit 12 provided on the vibrating plate to vibrate the vibrating plate, wherein a liquid inflow section is formed along the tangential direction of a cylindrical wall surface of the case 21 that comparts the reforming spacing 22 and a liquid outflow section is opened at almost the center on the vibrating plate side of the reforming spacing 22, and, the above liquid outflow section is configured by a vibrating plate side communication hole 15 having a fluid outlet hole 24 that penetrates a liquid outflow pipe 24A formed in the case 21, a central opening section 17 that is opened at almost the center of the vibrating plate 11, a peripheral opening section 18 that is opened at a position opposed to an outflow opening section 26 on the reforming spacing side of the liquid outflow pipe 24A, is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fine bubble generating apparatus that applies ultrasonic vibration to a passing liquid to generate micro-sized or nano-sized bubbles in the liquid.

  Patent Document 1 provides a fuel improvement device that attaches an ultrasonic vibrator to a fuel line, atomizes the fuel, attaches a magnet or an electromagnet downstream thereof, and further activates and ionizes the atomized fuel.

  In Patent Document 2, in order to achieve complete combustion by making liquid fuel oil particles into ultrafine particles, and to achieve low pollution with effective use of energy, the fuel oil filter bracket is connected with a transmitter and a wiring. A fuel oil reforming apparatus is provided that disposes the liquid fuel oil particles circulating in the fuel oil filter assembly into ultrafine particles.

  In Patent Document 3, an ultrasonic oscillating means for oscillating ultrasonic waves from the bottom surface is disposed on the bottom surface of the fuel container, and an ultrasonic wave from the ultrasonic oscillating means is selected according to the liquid level of the fuel in the fuel container. Provided is a fuel reformer having ultrasonic frequency variable means for varying the frequency of sound waves.

  Patent Document 4 discloses a water crushing process in which untreated water is crushed to form crushed water in which clusters due to hydrogen bonding between water molecules are decomposed, and part of the visible light region is formed in the crushed water thus formed. A water quality reforming method comprising a photochemical reaction step that activates resonance vibrations of polar water molecules by irradiating ultraviolet light containing them to make active water with high hydrophilicity and hydration properties to other ion atoms and molecules It is disclosed that non-treated water is passed through a container equipped with an ultrasonic generator as a pretreatment of the water crushing means. Further, in this cited document 4, it is disclosed that the ultrasonic generator is provided in a water tank that allows non-treated water to pass through, and that vibrations of about 20 kHz are imparted to the water that passes through the water tank.

JP 2001-263180 A JP 2002-332923 A JP 2006-291143 A JP 2007-330844 A

  As described in Patent Documents 1 to 3, a technique for applying an ultrasonic wave to a fuel and reforming the fuel (particulates) is already known. As described in Patent Document 4, Although it is also known to add vibration to water passing therethrough, micro- or nano-sized bubbles can be efficiently formed in the liquid by using a conventional method, particularly by simply providing a vibration generating means in one of the spaces into which the liquid flows. There was a problem that it was difficult to generate. For this reason, the present applicant has proposed a new fuel reformer for solving the above problems in Japanese Patent Application Nos. 2008-167632 and 2008-168567.

  The present invention is a further improvement of the fuel reformer of the present applicant, and provides a microbubble generator capable of generating microsized or nanosized bubbles in a passing liquid more efficiently.

  Therefore, the present invention provides a bottomed case that defines a cylindrical reforming space, a vibration plate provided so as to close the opening side of the case, and a vibration plate on the vibration plate for vibrating the vibration plate. And a liquid inflow portion is formed along the tangential direction of the cylindrical wall surface of the case defining the reforming space, and the liquid outflow portion is It is in opening in the approximate center by the side of the vibration plate of the said modification space.

  As a result, while the liquid flowing in from the liquid inflow portion rotates in the reforming space along the cylindrical wall surface of the case that defines the reforming space, the liquid outflow portion moves to the upper portion of the reforming space that opens. Since the ultrasonic vibration is applied by the vibration of the vibration plate, the bubbles generated by the ultrasonic waves can be concentrated as fine bubbles while concentrating on the central part by the swirling flow, and the sufficient bubbles are included. The liquid can be taken out. Furthermore, the position where the bubbles are concentrated can be changed by moving the opening position of the liquid inflow portion in the axial direction of the reforming space.

  In addition, the liquid outflow portion includes a fluid outlet hole penetrating a liquid outflow pipe formed in the case, a central opening that opens substantially in the center of the vibration plate, and a reforming space side opening of the liquid outflow pipe. It is desirable that the vibration plate-side communication hole has an outer peripheral opening that opens at a position facing each other.

  As a result, the liquid outflow portion can be formed separately on the case side and the vibration plate side, so that the assembly of the case defining the reforming space and the vibration plate closing one of the reforming spaces is improved. It is possible to achieve simplification of manufacturing west line.

  Furthermore, a vibration part having a vibration surface extending spirally toward the modification space side is formed on the side of the modification space of the vibration plate, and the vibration plate side communication hole is formed in the vibration part. Is desirable.

  Accordingly, even if the pipe portion for forming the vibration plate side communication hole is formed on the vibration plate, the vibration plate side communication hole of the liquid outflow portion contains a large amount of bubbles without obstructing the swirling flow of the liquid. It is possible to guide the liquid.

  Furthermore, it is desirable to provide a cylindrical wall portion at the approximate center of the bottom surface of the case opposite to the vibration plate.

  In this way, by providing a cylindrical wall at the bottom of the reforming space, it is possible to change the flow velocity of the swirling flow. It is possible to adjust.

  As described above, according to the present invention, an optimal bubble state is ensured in the liquid only by setting the positions of the liquid inflow portion and the liquid outflow portion and forming a predetermined swirl flow in the reforming space. There is an effect that it is possible.

It is a schematic block diagram of the fine bubble generator which concerns on this invention. It is explanatory drawing of the modification part of the fine bubble generator which concerns on this invention. It is a top view of the vibration part of the microbubble generator concerning this invention. It is a side view of the vibration part of the microbubble generator concerning this invention.

  The present invention provides a fine bubble generating device that allows bubbles generated in a liquid by ultrasonic vibration to be concentrated in a central portion by a swirling flow to become finer bubbles, and the liquid containing the bubbles can be efficiently taken out to the outside. There is.

  As shown in FIG. 1, a microbubble generator 1 according to the present invention includes an ultrasonic vibration generator 10 that generates ultrasonic vibrations, and a liquid that passes through the ultrasonic vibrations generated by the ultrasonic vibration generator 10. And a reforming unit 20 that generates and modifies bubbles. The liquid is fuel, water or the like.

  The ultrasonic vibration generator 10 includes a vibration plate 11 and an ultrasonic transducer unit 12 fixed on the vibration plate 11.

  Moreover, the said modification part 20 comprises the case 21 which has a bottomed cylindrical internal space, as FIG. 2 shows. This bottomed cylindrical internal space becomes a reforming space 22 through which liquid passes. The cylindrical wall surface of the case 21 is formed with an inflow opening 25 of a liquid inflow pipe 23A that defines a fluid outlet hole 23 extending in a tangential direction, and extends in the radial direction of the reforming space 22. An outflow opening 26 of the liquid outflow pipe 24A that defines the liquid outflow hole 24 is formed. Further, a swirl flow adjusting wall portion 28 extending in a cylindrical shape is provided at the center of the bottomed portion 29 of the case 21.

  Further, as shown in FIG. 3 and FIG. 4, a vibrating portion 13 having a vibrating surface 16 extending in a spiral shape is formed on the reforming space side of the vibrating plate 11. A vibration plate side communication hole 15 is formed in the center to communicate the cylindrically formed concave portion 14 with the outer peripheral portion 19. The vibration plate side communication hole 15 has a central opening 17 that opens to the concave portion 14 and an outer peripheral opening 18 formed in the outer peripheral portion 19, and the outer peripheral opening 18 includes the liquid outflow pipe 24 </ b> A. It arrange | positions so that the outflow opening part 26 of this may be opposed. The vibrating plate side communication hole 15 and the liquid outflow hole 24 constitute a liquid outflow portion. Reference numeral 27 denotes a flange portion for attaching the vibration plate 11.

  With the configuration as described above, the microbubble generator 1 according to the present invention is configured so that the liquid flowing from the inflow opening 25 of the liquid inflow pipe 23 flows into the reforming space 22 as shown in FIGS. The liquid rises so as to concentrate toward the central opening 17 of the liquid outflow part in the upper part of the reforming space 22 while turning along the cylindrical wall surface. Ultrasonic vibration generated by the vibrator unit 12 is applied to the liquid that rises while turning, and fine bubbles are generated in the liquid. Since the fine bubbles are particularly close to the center along the swirling flow, they are efficiently introduced from the cylindrical concave portion 14 into the central opening 17 of the liquid outflow portion.

  In addition, a cylindrical wall portion 28 is provided, and the diameter and height of the cylindrical wall portion 28 can be adjusted in accordance with the use situation and characteristics of the liquid, and the flow velocity of the swirling flow of the liquid can be changed. is there.

  The present invention is substantially aimed at reforming liquid fuel supplied to an internal combustion engine. However, ultrasonic vibration is applied to a fluid (gas or liquid) flowing into a predetermined space to cause the fluid to flow. Basically, it can be used for the purpose of reforming. Specifically, it is used for reforming hydrogen or hydrogen-containing gas supplied to fuel cells, reforming water used for chemicals and chemical synthesis, and atomization of gas supplied to perform chemical reactions. Is possible.

DESCRIPTION OF SYMBOLS 1 Fine bubble generator 10 Ultrasonic vibration generating part 11 Vibrating plate 12 Ultrasonic transducer unit 13 Vibrating part 14 Recessed part 15 Vibrating plate side communicating hole 16 Vibrating surface 17 Central opening part 18 Outer opening part 19 Outer part 20 Modification part 21 Case 22 Reforming space 23 Liquid inflow pipe 24 Liquid outflow pipe 25 Inflow opening 26 Outflow opening 27 Flange part 28 Cylindrical wall part 29 Bottomed part

Claims (4)

A bottomed case defining a cylindrical reforming space, a vibration plate provided to close the opening side of the case, and an ultrasonic vibration provided on the vibration plate to vibrate the vibration plate In the micro-bubble generator configured by the child unit,
The liquid inflow portion is formed along a tangential direction of a cylindrical wall surface of the case that defines the reforming space, and the liquid outflow portion opens at a substantially center on the vibration plate side of the reforming space. Fine bubble generator.   The liquid outflow portion includes a fluid outlet hole penetrating a liquid outflow pipe formed in the case, a central opening portion opened substantially at the center of the vibration plate, and an outflow opening portion on the reforming space side of the liquid outflow pipe. 2. The fine bubble generating device according to claim 1, wherein the fine bubble generating device is configured by a vibration plate side communication hole having an outer peripheral opening that opens at a position facing each other.   A vibration part having a vibration surface extending spirally toward the modification space side is formed on a side of the modification space of the vibration plate, and the vibration plate side communication hole is formed in the vibration part. The fine bubble generator according to claim 1 or 2. The microbubble generator according to any one of claims 1 to 3, wherein a cylindrical wall portion is provided at substantially the center of the bottom surface of the case opposite to the vibration plate.

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