WO1996029844A1 - Dispositif de chauffage permettant de rechauffer un milieu solide ou liquide - Google Patents

Dispositif de chauffage permettant de rechauffer un milieu solide ou liquide Download PDF

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Publication number
WO1996029844A1
WO1996029844A1 PCT/CH1995/000072 CH9500072W WO9629844A1 WO 1996029844 A1 WO1996029844 A1 WO 1996029844A1 CH 9500072 W CH9500072 W CH 9500072W WO 9629844 A1 WO9629844 A1 WO 9629844A1
Authority
WO
WIPO (PCT)
Prior art keywords
medium
heating device
permanent magnets
rotor
heating
Prior art date
Application number
PCT/CH1995/000072
Other languages
German (de)
English (en)
Inventor
Kamal Alavi
Original Assignee
Enviro Ec Ag
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 Enviro Ec Ag filed Critical Enviro Ec Ag
Priority to AU20651/95A priority Critical patent/AU2065195A/en
Publication of WO1996029844A1 publication Critical patent/WO1996029844A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/109—Induction heating apparatus, other than furnaces, for specific applications using a susceptor using magnets rotating with respect to a susceptor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24V99/00—Subject matter not provided for in other main groups of this subclass
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid

Definitions

  • the invention relates to a heating device for heating a solid or liquid medium, with at least one permanent magnet, which generates a magnetic field, in the area of which the electrically conductive medium for heating the same is arranged.
  • a rotor is arranged in a high vacuum-side interior of a housing, to which rotor disks are attached, which are also attached to the cooperate stator washers attached to the housing.
  • the components provided with these surfaces are heated.
  • the rotor is heated by eddy currents which result from the interaction of its own rotation with a magnetic field, the field lines of which run perpendicular to the rotor axis.
  • the magnetic field is generated by means of a permanent or electromagnet attached outside the housing, the field lines of which run perpendicular to the rotor axis.
  • the present invention was based on the object of creating a heating device according to the type described at the outset, by means of which an increased output and a maximum efficiency for heating a medium is achieved and which is suitable for various fields of application.
  • the object is achieved in that a plurality of permanent magnets arranged next to one another are provided, between which and a linear and / or rotary relative movement can be generated, in such a way that the permanent magnets pass the electrically conductive medium in succession.
  • the permanent magnets are arranged on the circumference of a rotor, from which the magnetic field is radiated approximately radially and the medium is guided inside or outside of this rotor, the relative movement by rotating the rotor and consequently the permanent magnet gnete to the medium.
  • the permanent magnets on the end face of a rotating disk are arranged such that they generate a magnetic field radiating in the direction of the disk axis of rotation and the medium is placed at a distance from at least one end face of the disk.
  • FIG. 1 shows a schematic longitudinal section through a heating device according to the invention
  • FIG. 2 shows a cross section through the heating device according to FIG. 1,
  • FIG. 3 shows a schematic cross section through an alternative embodiment of a heating device according to the invention
  • FIG. 4 shows a plan view of the rotating disk provided with permanent magnets according to FIG. 3,
  • FIG. 5 shows a schematic cross section through a further variant of a heating device according to the invention.
  • FIG. 6 shows a plan view of one half of the rotating disk provided with permanent magnets according to FIG. 5.
  • FIG. 1 shows a heating device 10 provided for heating a liquid medium 11, which essentially consists of a housing 12, a rotor 15, 18, a line coil 14 guided around the latter and containing the medium 11 and a drive unit 13 .
  • the rotor in turn comprises a shaft 15 which is rotatably mounted in the housing 12 and a drum 18 which is concentrically fastened to it by means of flanges 34.
  • the housing 12 has a cylindrical outer shape and has a base 16 by means of which it can be placed on a floor or the like and if required can be attached to this. Furthermore, this housing 12 is preferably provided on its entire inner surface with heat and possibly sound insulation 32, 33, and it is also formed in two or more parts in order to be able to mount the rotor therein.
  • the drum 18 is fastened on both sides to a flange 34, which in turn is held on the shaft 15 in a rotationally fixed manner.
  • the rotor formed with these is, as mentioned, rotatably supported in the housing 12 and coupled with the drive unit 13, which has, for example, an electric motor 17 and a deflecting gear 19.
  • a plurality of permanent magnets 22, 24, which are arranged next to one another, are provided on the drum 1 8 and a line coil 14, which is helically guided around the drum 1 8, with the electrically conductive medium 1 1 flowing through it, between these permanent magnets 22, 24 and the in the area of the magnetic field 1 1 generated by these, a rotary relative movement is generated when the drum 1 8 rotates. So that the permanent magnets 22, 24 pass the medium 1 1 in succession. This relative movement causes eddy currents in the medium, which cause the medium to heat up.
  • the permanent magnets 22, 24 are arranged at a uniform distance from one another on the circumference of the drum 18 and are alternately provided with a north (+) or south pole (-) on the outside thereof, as a result of which these magnets have continuously acting loop-shaped magnetic fields within a radiate a certain bandwidth, which eddy currents in the medium in this bandwidth cause relative motion.
  • these permanent magnets 22, 24 are inserted into recesses running parallel to the axis of rotation, which are provided on the circumference of a ring 18 'of the drum 18, and are held by a fastening ring 18 "which surrounds the ring 18', the latter, for example is produced from a ring 18 'made of steel, a fiber-reinforced carbon band wrapping around the permanent magnets 22, 24 and a hardening casting resin which holds the latter together
  • Several are arranged one behind the other in the ring 18 ', such that the permanent magnetic field generated by them is each radiated approximately radially from the drum 18 and in each case in a loop back into the adjacent opposite poles again approximately in the radial direction and with it the line coil 14, which is fixed in the housing 12, are to this magnet in a defined Distance arranged so that they are within the magnetic field generated by them.
  • this heating device 10 there are a large number, between 15 and 30, on the drum 18 provided with an outer diameter of approximately 300 mm and a length of approximately 500 mm. evenly distributed magnets 22, 24 arranged, each having a height of 20 mm and a width of 1 0 mm sen and five same-pole magnetic rods are inserted one behind the other per recess.
  • the drum 1 8 rotates at a speed of approximately 3000 rpm. In principle, even at a speed of approximately 1,000 rpm. sufficient heating of the medium is achieved. However, the faster the magnets pass through the medium, the greater the transmission power.
  • the permanent magnets 22, 24 are made from a commercially available material, preferably from neodymium, from a strontium-ferrite, a strontium-cobalt alloy or from another. material suitable for the respective application. It goes without saying that the stronger the magnetic field generation per unit area is provided in such a permanent magnet. that consequently a greater heating in the medium is effected with the same conditions.
  • the line coil 1 4 is also made from an electrically conductive material, for example from a copper alloy, from chromium steel, aluminum or a noble metal, such as platinum or the like. It is advantageously wound around the drum several times. A chemical additive, for example potassium, or another additive with the same effect is advantageously added to the electrically conductive water.
  • the two-part housing 12 is - as mentioned - provided on the inside with an insulation layer 32, 33 which, in addition to the heat and sound insulation, is preferably additionally equipped with an insulation shielding the electromagnetic fields from the outside, for example a lead foil.
  • the rotor is formed by the drum 1 8 as a flywheel and the energy transmitted by the drive unit can thus be fully utilized. As a result, the rotor continues to run for a while when the drive is switched off. This effect increases the heavier the drum is built.
  • the medium provided as electrically conductive water is conveyed through the conduit coil 1, which is helically guided around the drum 1 8 and fastened to the housing 12, in the sense of a continuous-flow heater, the conduit coil 14 having an inlet side 35 and an outlet side 36 shown in the drawing.
  • a line leading directly or indirectly to a consumer is connected to the latter, which line is led back from the outlet side 36 in a closed circuit back to the inlet side 35.
  • This heating device 10 is therefore particularly suitable for heating a house, in which the line is either routed directly through the radiators or through the floors of the house or indirectly into a storage tank. The water stored in the latter is thereby heated, which is then brought into circulation. In the same way, the line can be led into a boiler or a similar vessel for heating the water or other medium contained therein.
  • a control device which is known per se and is not shown in more detail, is advantageously provided, by means of which the drive unit and also a pump which conveys the heated water through the line coil 14 and which is also not illustrated can be switched on and off.
  • an emergency switch is provided, the actuation of which causes the rotor to stop immediately and, in particular, to take effect when a set temperature of the line coil is exceeded, for example when the medium is no longer being conveyed for any reason.
  • a rotary disk 45 with an even end face 45 'of the latter is uniform on both sides of a circular coil 46 Distributed permanent magnets 42, 44 arranged.
  • the line snake 46 runs parallel to the rotary disks 45, which are fastened on a drive shaft 43, which can be rotated by a drive element, not shown in detail.
  • the permanent magnets 42, 44 are arranged relative to one another in such a way that they each emit a magnetic field approximately in the direction of the axis of rotation 41.
  • the two rotating disks 45 are of identical design and their adjacent magnets are equipped on the mutually facing end faces with a north pole and on the other with a south pole, so that part of the magnetic field is perpendicular to the opposite disc and part in each case a loop on the two adjacent opposite-pole magnets 44 on the same disk in turn occurs approximately in the axial direction.
  • the electrically conductive line coil 46 and thus the likewise conductive medium 11 are placed at a distance from the end faces 45 'of the disks 45 so that they again lie in the magnetic field generated by the magnets 42, 44.
  • the magnets 42, 44 are attached to the outer circumference of a respective rotating disk 45 and a certain number of magnets are arranged at a uniform distance from one another per disk.
  • the line coil 46 is guided once around the shaft 43 and then guided to a consumer via the radial outlet side 48.
  • This heating device 40 is suitable for applications in which there is little space required for it.
  • FIG. 5 and 6 show a heating device 50 which serves to heat an electrically conductive hotplate 52 provided as a medium. The latter consequently heats up a pan 51 placed on it and thus a cookware 53 located in the latter.
  • This heating device 50 expediently has a horizontally oriented, with a vertical axis of rotation rotating disc 55, which is arranged at a distance from the likewise horizontal hotplate 52, is rotatably mounted in an indicated frame 59 of a cooker and not by one rotary actuator shown in more detail is rotated.
  • This disk 55 is equipped with segment-shaped permanent magnets 56, 57 which, like the disk 45 according to FIG. 3, emit a magnetic field generated in the axial direction.
  • segment-shaped permanent magnets 56, 57 extend from the outer circumference to the center of the disk 55 and are in turn loaded alternately with one north and one south pole.
  • the hotplate 52 is located within the field lines generated by these magnets and is therefore heated very quickly to a selectable temperature. Moreover, the top of the hotplate can be provided with a layer shielding the electrical fields.
  • a rotary relative movement between the magnets and the medium could also be generated in that both the line coil 14 and the drum 18 would advantageously be rotated in the opposite direction of rotation.
  • the line coil could also be guided helically or in another manner within the drum.
  • this drum 18 as well as the magnets could be constructed differently. Practice has also shown that the number of permanent magnets should be as large as possible for maximum power transmission, as a result of which a given Speed of the drum more pulses per unit of time would be realized.
  • the drum could also be formed from a multipole ring, which is alternately provided on the outside on the circumference with a north and a south pole.
  • heating devices are also not limited to the above-mentioned ones, but can be used for a wide variety of areas in which thermal energy is required. Some particularly suitable uses are mentioned here, for example refrigerators, air conditioning systems, car engines, chemical or medical devices.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un dispositif de chauffage (10) permettant de réchauffer un milieu solide ou liquide (11). Dans ledit dispositif, plusieurs aimants permanents (22, 24) placés à la périphérie d'un rotor (15, 18) produisent un champ magnétique dans la région duquel est placé le milieu électroconducteur (11). Ces aimants permanents (22, 24) produisent ce champ magnétique de façon quasi radiale. La rotation du rotor entraîne un mouvement relatif entre les aimants permanents et le milieu, ce qui provoque des courants tourbillonnaires dans ce dernier et par conséquent son réchauffement. Il est prévu d'utiliser, comme milieu (11), de l'eau électroconductrice qui circule à travers un serpentin (14) installé en spirale autour du rotor à une certaine distance de ce dernier. Ce serpentin (14) présente un côté admission (35) et un côté évacuation (36) qui sont raccordés par une conduite qui mène du côté évacuation à un consommateur et retourne en circuit fermé au côté admission. Ce dispositif de chauffage permet de transférer à un milieu une conduction thermique très élevée.
PCT/CH1995/000072 1995-03-17 1995-04-03 Dispositif de chauffage permettant de rechauffer un milieu solide ou liquide WO1996029844A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20651/95A AU2065195A (en) 1995-03-17 1995-04-03 Heating device for heating a solid or liquid medium

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH763/95-6 1995-03-17
CH76395 1995-03-17
CN96190456A CN1153591A (zh) 1995-03-17 1996-03-18 加热介质的加热设备

Publications (1)

Publication Number Publication Date
WO1996029844A1 true WO1996029844A1 (fr) 1996-09-26

Family

ID=25685605

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/CH1995/000072 WO1996029844A1 (fr) 1995-03-17 1995-04-03 Dispositif de chauffage permettant de rechauffer un milieu solide ou liquide
PCT/CH1996/000104 WO1996029845A1 (fr) 1995-03-17 1996-03-18 Dispositif de chauffage destine a chauffer un milieu

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/CH1996/000104 WO1996029845A1 (fr) 1995-03-17 1996-03-18 Dispositif de chauffage destine a chauffer un milieu

Country Status (6)

Country Link
EP (1) EP0760198A1 (fr)
JP (1) JPH10503617A (fr)
CN (1) CN1153591A (fr)
AU (2) AU2065195A (fr)
CA (1) CA2190360A1 (fr)
WO (2) WO1996029844A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010971A1 (fr) * 1997-08-21 1999-03-04 Europat Limited Dispositif de chauffage
FR2777411A1 (fr) * 1998-04-09 1999-10-15 Usui Kokusai Sangyo Kk Dispositif de chauffage magnetique
GB2339377A (en) * 1998-05-12 2000-01-19 Usui Kokusai Sangyo Kk PM induction heater for fluid
CN102052706A (zh) * 2010-12-28 2011-05-11 张洪军 回转体采暖器
CN102095219A (zh) * 2010-12-28 2011-06-15 张洪军 提温式回转体采暖器

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JP3955888B2 (ja) * 2003-12-12 2007-08-08 トック・エンジニアリング株式会社 永久磁石式渦電流加熱装置
US20090203119A1 (en) * 2006-07-25 2009-08-13 Brian Anthony Evans Biomass reactor
DE102008041104A1 (de) * 2008-08-07 2010-02-11 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Mischvorrichtung mit Induktionsheizung
JP5390889B2 (ja) * 2009-03-06 2014-01-15 信一 近藤 金属容器内の液体の加熱方法、及びそのための装置
JP5545436B2 (ja) * 2010-03-31 2014-07-09 住友電気工業株式会社 発電システム
WO2011093192A1 (fr) * 2010-01-29 2011-08-04 住友電気工業株式会社 Système de génération d'énergie
JP5293626B2 (ja) * 2010-01-29 2013-09-18 住友電気工業株式会社 誘導加熱装置およびそれを備える発電システム
CN103200719B (zh) * 2013-03-04 2015-04-22 哈尔滨工业大学（威海） 双转子电磁热机
CN103369752B (zh) * 2013-07-09 2017-04-12 浙江芯特科技有限公司 一种永磁式涡流加热装置
CN103347320B (zh) * 2013-07-09 2017-03-22 浙江芯特科技有限公司 一种柱式永磁涡流加热装置
KR101430940B1 (ko) * 2014-01-03 2014-09-25 강삼열 가열 장치
ES2549175A1 (es) * 2014-04-23 2015-10-23 Antonio CURIEL GRANADOS Calentador de fluidos
CN104202858B (zh) * 2014-08-28 2016-06-29 上海锐漫能源科技有限公司 加热金属管道流水的滚筒式永磁加热器
EP3217521B1 (fr) * 2014-11-06 2021-08-11 Nippon Steel Corporation Dispositif de chauffage de type à courant de foucault
JP6380147B2 (ja) * 2015-02-10 2018-08-29 新日鐵住金株式会社 渦電流式発熱装置
JP6380148B2 (ja) * 2015-02-10 2018-08-29 新日鐵住金株式会社 渦電流式発熱装置
KR101649820B1 (ko) 2015-04-20 2016-08-19 조은별 와전류 유도 발열장치
CN105135678B (zh) * 2015-09-23 2018-08-07 安徽三鼎锅炉制造有限公司 有机热载体供热设备
GB2556267A (en) * 2016-02-10 2018-05-23 Rotaheat Ltd Heat generator
DE102016202896A1 (de) * 2016-02-24 2017-08-24 Mirja Liane Löhr Vorrichtung zur Erzeugung von Wärme
DE102018108179A1 (de) * 2018-04-06 2019-10-10 Andreas Seiwald Rotations-Induktions-Wärmeerzeuger mit Gleichstromerregung, extrem kleinem elektrischen/kinetischen Wirkungsgrad und extrem hohem thermischen COP
CN109277616A (zh) * 2018-12-12 2019-01-29 济南大学 一种加工低刚度薄壁叶片的方法及装置
WO2020145277A1 (fr) * 2019-01-10 2020-07-16 日本製鉄株式会社 Appareil de production de chaleur de type à courants de foucault
CN109855285A (zh) * 2019-03-04 2019-06-07 田佳龙 一种新能源永磁磁化热水机

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DE1106440B (de) * 1956-02-04 1961-05-10 Max Baermann Vorrichtung zum Erwaermen des Inhaltes von ganz oder teilweise aus elektrisch bzw. magnetisch gut leitendem Werkstoff bestehenden Behaeltern, insbesondere zum Erhitzen der Speisen in Kochtoepfen, Pfannen od. dgl. mittels eines umlaufenden, mechanisch angetriebenen mehrpoligen Magnetsystems
DE1169603B (de) * 1956-04-28 1964-05-06 Max Baermann Vorrichtung zum Erwaermen des Inhaltes von ganz oder teilweise aus elektrisch bzw. magnetisch gut leitendem Werkstoff bestehenden Behaeltern
DE1186568B (de) * 1961-08-12 1965-02-04 Max Baermann Vorrichtung zum Erwaermen von in Metalldosen, Metallbehaeltern, Metallfolien, Metallpackungen od. dgl. abgefuellten festen oder fluessigen Speisen
GB2111360A (en) * 1981-12-11 1983-06-29 Nat Res Dev Induction heating apparatus
EP0087727A1 (fr) * 1982-02-27 1983-09-07 Franz Klaus Union Armaturen Pumpen GmbH & Co. Appareil pour chauffer un fluide coulant
US4421967A (en) * 1980-07-21 1983-12-20 Vs Systems, Inc. Windmill driven eddy current heater
US4511777A (en) * 1984-07-19 1985-04-16 Frank Gerard Permanent magnet thermal energy system
US4614853A (en) * 1985-10-15 1986-09-30 Frank Gerard Permanent magnet steam generator

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Publication number Priority date Publication date Assignee Title
DE1106440B (de) * 1956-02-04 1961-05-10 Max Baermann Vorrichtung zum Erwaermen des Inhaltes von ganz oder teilweise aus elektrisch bzw. magnetisch gut leitendem Werkstoff bestehenden Behaeltern, insbesondere zum Erhitzen der Speisen in Kochtoepfen, Pfannen od. dgl. mittels eines umlaufenden, mechanisch angetriebenen mehrpoligen Magnetsystems
DE1169603B (de) * 1956-04-28 1964-05-06 Max Baermann Vorrichtung zum Erwaermen des Inhaltes von ganz oder teilweise aus elektrisch bzw. magnetisch gut leitendem Werkstoff bestehenden Behaeltern
DE1186568B (de) * 1961-08-12 1965-02-04 Max Baermann Vorrichtung zum Erwaermen von in Metalldosen, Metallbehaeltern, Metallfolien, Metallpackungen od. dgl. abgefuellten festen oder fluessigen Speisen
US4421967A (en) * 1980-07-21 1983-12-20 Vs Systems, Inc. Windmill driven eddy current heater
GB2111360A (en) * 1981-12-11 1983-06-29 Nat Res Dev Induction heating apparatus
EP0087727A1 (fr) * 1982-02-27 1983-09-07 Franz Klaus Union Armaturen Pumpen GmbH & Co. Appareil pour chauffer un fluide coulant
US4511777A (en) * 1984-07-19 1985-04-16 Frank Gerard Permanent magnet thermal energy system
US4614853A (en) * 1985-10-15 1986-09-30 Frank Gerard Permanent magnet steam generator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010971A1 (fr) * 1997-08-21 1999-03-04 Europat Limited Dispositif de chauffage
FR2777411A1 (fr) * 1998-04-09 1999-10-15 Usui Kokusai Sangyo Kk Dispositif de chauffage magnetique
GB2339377A (en) * 1998-05-12 2000-01-19 Usui Kokusai Sangyo Kk PM induction heater for fluid
DE19921320C2 (de) * 1998-05-12 2002-10-17 Usui Kokusai Sangyo Kk Magnetheizgerät
GB2339377B (en) * 1998-05-12 2003-07-09 Usui Kokusai Sangyo Kk Magnet type heater
CN102052706A (zh) * 2010-12-28 2011-05-11 张洪军 回转体采暖器
CN102095219A (zh) * 2010-12-28 2011-06-15 张洪军 提温式回转体采暖器

Also Published As

Publication number Publication date
EP0760198A1 (fr) 1997-03-05
CA2190360A1 (fr) 1996-09-26
CN1153591A (zh) 1997-07-02
JPH10503617A (ja) 1998-03-31
AU2065195A (en) 1996-10-08
WO1996029845A1 (fr) 1996-09-26
AU4936596A (en) 1996-10-08

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