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EP0488631A1 - Dispositif pour produire plusieurs jets de gouttelettes - Google Patents

Dispositif pour produire plusieurs jets de gouttelettes Download PDF

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Publication number
EP0488631A1
EP0488631A1 EP91310851A EP91310851A EP0488631A1 EP 0488631 A1 EP0488631 A1 EP 0488631A1 EP 91310851 A EP91310851 A EP 91310851A EP 91310851 A EP91310851 A EP 91310851A EP 0488631 A1 EP0488631 A1 EP 0488631A1
Authority
EP
European Patent Office
Prior art keywords
chamber
water
acoustic device
producing
outlets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91310851A
Other languages
German (de)
English (en)
Inventor
Masayuki Hiraoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0488631A1 publication Critical patent/EP0488631A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/08—Fountains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices

Definitions

  • the present invention relates to an apparatus for producing a plurality of streams of liquid droplets, eg streams of parabolic shape for producing a fountain.
  • Such streams when illuminated by multiple stroboscopic lights give the visual effect of visually distinguishing the droplets which produces a beautiful, aesthetically pleasing effect.
  • the invention may also be employed in educational or industrial applications.
  • the present invention provides an apparatus for producing a plurality of streams of liquid droplets, the apparatus comprising a first chamber having an inlet and a second chamber provided with a plurality of outlets the first chamber being provided with a channel for conveying liquid from the inlet to an acoustic device for producing vibrations within the liquid, said acoustic device being located within the first chamber, said second chamber having an internal frustoconical wall which narrows towards the outlets and a generally conical protrusion having base which is adjacent said outlets and an apex which points towards said acoustic device.
  • the present invention enables acoustic vibrations to form droplets in several streams simultaneously, using a single device. Moreover, the conventional apparatus described above has a problem of generating undesirable reflected and diffracted waves which would interfere with the droplets and disturb the stream. The present invention is able to suppress the production of reflected and diffracted waves and to produce several well-ordered, branching streams.
  • the present invention also provides an apparatus for producing sound in a branching flow of water and which comprises a cylindrical lower body to which is attached a water supply pipe in the centre of the bottom thereof, and a topless-cone-shaped upper body from which an indefinite number of branching pipes lead off from the upper periphery thereof.
  • the upper and lower bodies are connected by a hollow area. Inside the upper body and extending down from the centre is an inverted cone. Inside the lower body and extending up from the bottom thereof is a cylinder containing a device for producing sound-in-water, with an annular water path surrounding the cylinder. This water path is penetrated by several support pipes which support the lower body.
  • the device for producing sound-in-water comprises a round, elastic vibration membrane stretched over the top, and installed below the centre of this membrane, and a vibration coil surrounded by a ring-shaped permanent magnet, with a cylindrical projecting core fitting up into the centre of the coil within this magnet.
  • a filter towards the bottom of the above mentioned in water-sound-producing device inside the above mentioned lower body is a filter, the general construction of which is described in Japanese Patent Application 90-268213 "Filter for Eliminating Pulse and Turbulence in Water Flow".
  • This filter comprises a flexible and porous, many-holed sponge-type member which is charged with water from the supply pipe, so that a residual air pocket forms in the top of the water-in-sound producing device, the air pocket being created when water is passed through the device.
  • the main purpose of this invention is to create a stream of multi-branching streams of distinct droplets produced by regular sound waves in the water or other liquid, without allowing any droplets of undesirable form to be apparent in the streams.
  • Sources of undesirable droplets include:-
  • both the upper and lower bodies are made of vibration resistant rubber or plastic materials.
  • Pulsed flow and turbulence (b) in the water supply are inevitably generated by whatever pump is used to supply the water. These are preferably suppressed or eliminated by a filter.
  • a preferred embodiment of the present invention has been designed to avoid producing (c) reflected or diffracted waves. That is, the water coming in from the supply pipe passes first through the filter. The compound effect of the elasticity in the sponge-like member and in the air pocket, plus the bulk elasticity of the air trapped in the sponge serve to reduce or eliminate the pulse and turbulence in the water supply. Then, this water is fed into a circular water path through which it rises and fills the space in the upper body. The internal circumference of this space in the upper body. The internal circumference of this space is cone shaped, and suspended at the very centre of this space is an inverted cone. Thus, all the internal surfaces are round, with no flat surfaces, protrusions, or indentations. The bottom is round, and, proceeding upward, the cross section is doughnut-shaped with gradually decreasing area until it flows into the branching pipes at the top.
  • the vibration membrane of the sound-producing device At the bottom of the cone-shaped space is located the vibration membrane of the sound-producing device. This membrane, through the operation of the vibration coil, sends 50 or 60 vibrations per second into the water filling the space.
  • the vibration membrane is round and the operation of the vibration source at its centre emits a uniform wave.
  • This structure suppresses the generation of diffracted waves.
  • the cone shaped walls and the suspended cone at the top of the space mean there are no surfaces perpendicular to the direction of the waves being produced. This structure suppresses the generation of reflected waves.
  • These streams may be illuminated using a device described in Japanese Patent Application No. 90-253533 entitled "Method for Distinguishing Moving Granular Objects". Two or more coloured multi-strobe lights are used. The droplets created by the apparatus are thus caused shine both red or blue, and the resultant fountain can be appreciated as an object of aesthetic beauty.
  • a device comprises a lower body 1 comprising a cylindrical case having a bottom and made of a hard plastics material.
  • a horizontal flange 1a surrounds the upper edge of the case and a water supply pipe 2 is connected to the centre of the case bottom.
  • a plurality water inlet holes 3 are arranged in and around the case bottom, across the bore of the water supply pipe.
  • An upper body 4 comprises a hard frustoconical plastics shell with a horizontal flange (4a) formed around the lower circumference thereof, opposing flange 1a.
  • Branching pipes 5 are arranged around the upper periphery of the upper body.
  • the flanges 1a of the lower body 1 and the upper body 4 respectively, are separated by an annular packing seal but are urged together to sandwich the seal by bolts 7 and nuts 8 to enclose a hollow interior of the device. From the centre of the uppermost port inside this hollow body is suspended an inverted cone 9. A cylindrical in-water sound generating device 11 is set within the lower body 1.
  • the lower body 1 is supported by four supporting pipes 12 depending from the sides of the lower body, across a circular or annular channel 10.
  • the structure of the in-water sound generating device 11 is as follows. Extending across the top of a vertical cylindrical wall 13, which defines the inner wall of the channel 10, is a horizontal central base 14. Stretched over and blocking off the top of the cylinder is a circular disc-shaped rubber vibration membrane 15, held in place by a restraining ring 16, itself held in place by a plurality of screws 17. A vibration coil 18 is located under the centre of the vibration membrane 15. A toroidal permanent magnet 20 surrounds the coil. A small annular gap G separates the magnet from the coil. This magnet is mounted on a cylindrical seat 19a which forms the bottom of a narrower cylindrical protruding cores 19 which is fitted up into the centre of the vibration coil. This core is set on a central base which is of wider diameter than the core.
  • the cushion prevents the vibration membrane 15 from undergoing excessive downward deformation under the pressure of water.
  • the supporting pipes 12 also serve as pathways for supplying air to the inside of the in-water-sound generating device 11.
  • An electric power cord is introduced through one of these pipes for delivering power to the vibration coil 18.
  • a filter 22 is formed in the bottom of the lower body 1.
  • the filter comprises an elastic and porous foam or sponge-like member 23 which blocks the bottom of the circular water path above the supply pipe 2. This member extends about half-way up into the in-water sound generating device and is partially filled with water. In use, an air pocket 24 is formed between the upper surface of this foam sponge-like member and the central base 14.
  • Water introduced via the water supply pipe 2 passes through the water supply holes 3 into the bottom of the lower body 1. It passes through the foam or the sponge-like member 23, enters the annular channel 10 and continues to climb. However, the water level W inside the in-water sound generating device is located within the sponge-like member in the lower part of the cylinder. Air in the sponge-like member above this water level and in the air pocket is trapped and compressed.
  • the flow water that fills the space S in the upper body 4 is smooth and substantially streamline.
  • this water contacts the vibration membrane 15 of the in-water sound generating device.
  • the permanent magnet 20 is affected by the resulting alternating magnetic field and vibrates up and down. This in turn vibrates the membrane 15 which then generates sound waves in the water within the space S.
  • the shape of the in-water sound generating device 11 is designed to inhibit the production of diffracted waves.
  • Figures 7, 8, and 9 show examples of shapes that do produce diffracted waves.
  • Figure 8 is a top view of a square in-water sound generating device 11′.
  • Figure 9 is a mid-line cross sectional view of the device shown in Drawing 8.
  • the four corners p, q, r, and s of the square vibrating membrane 15′ are difficult to vibrate, so that the sound generated at the centre of the membrane 15′ is diffracted at the four corners, leading to the production of undesirable droplets.
  • the vibration membrane should not be square and preferably, is substantially circular.
  • the structure of this invention is designed to avoid producing reflected and diffracted waves.
  • the sound waves produced in the water in the space S travel upwards and arrive near the branching pipes 5.
  • the molecules begin to move with increasingly rapidity and the water ejected from the apertures of the branching pipes 5 forms distinct droplets.
  • the device described above may be used for purposes of demonstration (eg in the teaching of physics) or for decorative effect.
  • a two-colour (eg red and blue) multi-strobe light as described in Japanese Patent Specification No. 90-253533 "Method for Discriminating Moving Granular Objects," if the device is incorporated in a fountain, the resultant droplets shine in an aesthetically pleasing manner.

Landscapes

  • Special Spraying Apparatus (AREA)
  • Instructional Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP91310851A 1990-11-26 1991-11-26 Dispositif pour produire plusieurs jets de gouttelettes Withdrawn EP0488631A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2324116A JPH0748128B2 (ja) 1990-11-26 1990-11-26 水中音を含む多分岐水流発生装置

Publications (1)

Publication Number Publication Date
EP0488631A1 true EP0488631A1 (fr) 1992-06-03

Family

ID=18162335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91310851A Withdrawn EP0488631A1 (fr) 1990-11-26 1991-11-26 Dispositif pour produire plusieurs jets de gouttelettes

Country Status (2)

Country Link
EP (1) EP0488631A1 (fr)
JP (1) JPH0748128B2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006037635A1 (de) * 2006-08-09 2008-02-14 Oase Gmbh Wasserstrahlerzeuger

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3639023B2 (ja) * 1995-09-21 2005-04-13 株式会社ウォーターパール 噴水装置
JP6649092B2 (ja) * 2016-01-13 2020-02-19 日本電産サンキョー株式会社 流体放出ユニット

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640472A (en) * 1970-08-28 1972-02-08 John O Hruby Jr Liquid discharge nozzle having improved flow control means
US3782629A (en) * 1970-11-09 1974-01-01 Rain Jet Corp Flow control in ornamental fountains
EP0021996A1 (fr) * 1979-06-18 1981-01-07 Instruments S.A. Dispositif pour la production d'un jet d'aérosol
US4667877A (en) * 1985-08-15 1987-05-26 Carnegie-Mellon University Multi-orifice impulsed spray generator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640472A (en) * 1970-08-28 1972-02-08 John O Hruby Jr Liquid discharge nozzle having improved flow control means
US3782629A (en) * 1970-11-09 1974-01-01 Rain Jet Corp Flow control in ornamental fountains
EP0021996A1 (fr) * 1979-06-18 1981-01-07 Instruments S.A. Dispositif pour la production d'un jet d'aérosol
US4667877A (en) * 1985-08-15 1987-05-26 Carnegie-Mellon University Multi-orifice impulsed spray generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006037635A1 (de) * 2006-08-09 2008-02-14 Oase Gmbh Wasserstrahlerzeuger
DE102006037635B4 (de) * 2006-08-09 2016-08-04 Oase Gmbh Wasserstrahlerzeuger

Also Published As

Publication number Publication date
JPH04191786A (ja) 1992-07-10
JPH0748128B2 (ja) 1995-05-24

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