EP0122840B1 - Mikrowellenbehandlungsanlagen, insbesondere für Koppelungsgeräte von einer elektromagnetischen Welle mit absorbierendem Material - Google Patents

Mikrowellenbehandlungsanlagen, insbesondere für Koppelungsgeräte von einer elektromagnetischen Welle mit absorbierendem Material Download PDF

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Publication number
EP0122840B1
EP0122840B1 EP84400633A EP84400633A EP0122840B1 EP 0122840 B1 EP0122840 B1 EP 0122840B1 EP 84400633 A EP84400633 A EP 84400633A EP 84400633 A EP84400633 A EP 84400633A EP 0122840 B1 EP0122840 B1 EP 0122840B1
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EP
European Patent Office
Prior art keywords
heated
dielectric
treating apparatus
principal
accordance
Prior art date
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Expired
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EP84400633A
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English (en)
French (fr)
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EP0122840A1 (de
Inventor
Joel Henri Auguste Soulier
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Individual
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Individual
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Priority to AT84400633T priority Critical patent/ATE29360T1/de
Publication of EP0122840A1 publication Critical patent/EP0122840A1/de
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    • 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
    • H05B6/64—Heating using microwaves
    • H05B6/78—Arrangements for continuous movement of material
    • 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
    • H05B6/64—Heating using microwaves
    • H05B6/72—Radiators or antennas

Definitions

  • the present invention relates to a microwave applicator for heating dielectric or multi-dielectric materials which may include a metallic element in any form.
  • the present invention relates to an electromagnetic energy transfer applicator between a microwave source and a material to be heated, in particular of the slow wave type and cooperating with a coupling device between the microwave source and the material. to be heated, as well as with a possible scrolling device for said material to be heated, in particular constituted by a propulsive-lifting device with gaseous or liquid fluid, or any other scrolling device known per se, which applicator is characterized in that said device coupling consists of a main multi-dielectric structure having a dielectric permittivity gradient and radiating an evanescent wave in the presence of said material to be heated when the latter is placed at a distance less than a wavelength relative to this multi-structure dielectric which main multi-dielectric structure (A) cooperates with one or more multi-dielectric structures ues secondary (B), which are arranged at a distance not exceeding a wavelength relative to the main structure (A) and which are excited by the latter in the presence of said material to be heated (10), which material to be heated has
  • the secondary structure or structures are arranged symmetrically with respect to the material to be heated.
  • the main multi-dielectric structure is rigid and with circular symmetry so as to heat a fluid material.
  • said multi-dielectric structures are staggered in the mass of the fluid material to be heated.
  • the main multi-dielectric structure is flexible so as to adapt to the shape of the material to be heated, even of very large volume, or to wrap around the latter.
  • the main multi-dielectric structure and the secondary multi-dielectric structure form a two-wire line which can be wound around the material to be heated.
  • the dielectric permittivity of the fluid used is such that it does not disturb the coupling.
  • the frequency of the electromagnetic energy is between 0.3 GHz and 300 GHz.
  • the multi-dielectric structure being of the slow wave type, the wave which leaves this structure is said to be evanescent, that is to say that it is a wave whose fields do not connect, therefore the wave does not propagate according to Maxwell's equations.
  • the propagation of such a wave does not exceed a wavelength in the air.
  • the remaining energy is therefore very low at a short distance, which is advantageous for the construction of the ovens.
  • the device shown in FIG. 1 comprises a set of two multi-dielectric structures A and B spaced apart by a wavelength p.
  • the electromagnetic energy source 1 excites the structure A composed of two dielectrics 2 and 3, the element 2 of which has a permittivity lower than that of the element 3.
  • the main incident wave 4 in the absence of material to be heated, is reflected at 6 until the auxiliary charge 8. Part 5 of the wave 4 propagates in the space between the two structures A and B.
  • the structure B is not excited.
  • FIG. 2 represents the assembly A and B with a material 10 to be heated, which is included in the volume delimited by the two internal faces 9 of the structures A and B and whose permittivity is greater than that of the element 3.
  • this body 10 therefore modifies the propagation in the structure A in such a way that the evanescent wave 5 crosses the material to be heated 10 and enters the structure B to undergo a reflection 11.
  • the incident wave continues to propagate by successive reflections by repeating the phenomenon of coupling on the material.
  • FIG. 3 shows an example of application with a propellant-air lift box 14.
  • the air jets exiting at 15 lift and propel the profile 16 in the longitudinal axis of the structure without disturbing the coupling; the adjusting members 13 allow to adjust the coupling on structure B (cf. figure 4).
  • FIG. 5 represents a structure combined with a liquid drive system 17 which may for example be an oil, the material 18 being in suspension.
  • a liquid drive system 17 which may for example be an oil, the material 18 being in suspension.
  • FIG. 6 represents a structure combined with a propulsion system in a fluidized bed of solid particles 18 transporting materials to be heated 16.
  • FIG. 7 represents a structure 19 immersed in a closed metal box 20 filled with a material to be heated 21.
  • FIG. 8 represents a grouping of structures 22 staggered in a duct 23 without specification and where the material to be heated 24 circulates.
  • FIG. 9 represents a flexible structure 25 surrounding a bulky object to be heated, for example the freezing of fruit trees.
  • the structure represented by the arrangement of FIGS. 1 to 4 can be applied to the heating of the extruded rubber profiles with a view to their vulcanization or polymerization or crosslinking, or even to electric cables.
  • Figure 8 allows the heating of very large volumes without special shielding precautions, for example the drying of grains moving by gravity in any duct.
  • FIG. 9 represents the heating of a tree or a greenhouse by a flexible structure 25.
  • the energy coupling is carried out only on the regions close to 26 of the object to be heated 24 less than a length d 'wave.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (9)

1. Applikator zum Übertragen elektromagnetischer Energie zwischen einer Quelle von Mikrowellen (1) und einem zu heizenden Material (10), insbesondere vom Typ mit langsamer Welle und zusammenwirkend mit einem Kopplungsgerät zwischen der Mikrowellenquelle und dem zu heizenden Material sowie mit einer eventuell vorhandenen Transporteinrichtung für das zu heizende Material, insbesondere bestehend aus einem Antriebs- und Auftriebsgerät mit einem Gas oder einer Flüssigkeit oder aus jeder anderen an sich bekannten Transporteinrichtung, wobei der Applikator dadurch gekennzeichnet ist, daß das Kopplungsgerät aus einer primären multidielektrischen Struktur (A), die einen Gradienten der dielektrischen Leitfähigkeit aufweist und in Anwesenheit des zu heizenden Materials eine abklingende Welle ausstrahlt, wenn das letztere mit einem Abstand, der kleiner als eine Wellenlänge ist, in Bezug auf diese multidielektrische Struktur angeordnet ist, wobei die primäre multidielektrische Struktur (A) mit einer oder mehreren sekundären multidielektrischen Strukturen (B) zusammenwirkt, die in Bezug auf die primäre Struktur (A) mit einem die Wellenlänge nicht überschreitenden Abstand angeordnet sind und die durch die letzteren bei Anwesenheit des zu heizenden Materials (10) erregt werden, und wobei das zu heizende Material eine dielektrische Leitfähigkeit aufweist, die diejenige des unmittelbar benachbarten Dielektrikums übersteigt.
2. Applikator nach Anspruch 1, dadurch gekennzeichnet, daß die sekundäre Struktur (B) oder die sekundären Strukturen symmetrisch in Bezug auf das zu heizende Material (10) angeordnet sind.
3. Applikator nach Anspruch 1, dadurch gekennzeichnet, daß die primäre multidielektrische Struktur starr und kreissymmetrisch ist, um so ein flüssiges oder gasförmiges Material zu heizen.
4. Applikator nach einem der Ansprüche 1 und 3, dadurch gekennzeichnet, daß die multidielektrischen Strukturen (22) netzartig in der Masse des zu heizenden strömenden Materials angeordnet sind.
5. Applikator nach Anspruch 1, dadurch gekennzeichnet, daß die primäre multidielektrische Struktur schmiegsam ist, so daß sie sich der Form des zu heizenden Materials selbst bei einem sehr großen Volumen anpaßt oder daß sie sich um die letztere wickelt.
6. Applikator nach einem der Ansprüche 1 und 5, dadurch gekennzeichnet, daß die primäre multidielektrische Struktur und die sekundäre multidielektrische Struktur eine bifilare Leitung bilden, die um das zu heizende Material herumgewickelt werden kann.
7. Applikator nach Anspruch 1, dadurch gekennzeichnet, daß die primäre multidielektrische Struktur (A) und die sekundäre oder die sekundären multidielektrischen Strukturen eine Abschlußhilfslast (8) aufweisen.
8. Applikator nach Anspruch 1, dadurch gekennzeichnet, daß im Fall wo ein Antriebs- und Auftriebsgerät mit einem Gas oder einer Flüssigkeit vorgesehen ist, die dielektrische Leitfähigkeit des verwendeten strömungsfähigen Materials so gewählt ist, daß es die Kopplung nicht behindert.
9. Applikator nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Frequenz der elektromagnetischen Energie zwischen 0,3 GHz und 300 GHz liegt.
EP84400633A 1983-04-01 1984-03-29 Mikrowellenbehandlungsanlagen, insbesondere für Koppelungsgeräte von einer elektromagnetischen Welle mit absorbierendem Material Expired EP0122840B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400633T ATE29360T1 (de) 1983-04-01 1984-03-29 Mikrowellenbehandlungsanlagen, insbesondere fuer koppelungsgeraete von einer elektromagnetischen welle mit absorbierendem material.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8305428 1983-04-01
FR8305428A FR2543778A1 (fr) 1983-04-01 1983-04-01 Dispositif de couplage d'une onde electromagnetique sur un materiau absorbant

Publications (2)

Publication Number Publication Date
EP0122840A1 EP0122840A1 (de) 1984-10-24
EP0122840B1 true EP0122840B1 (de) 1987-09-02

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EP84400633A Expired EP0122840B1 (de) 1983-04-01 1984-03-29 Mikrowellenbehandlungsanlagen, insbesondere für Koppelungsgeräte von einer elektromagnetischen Welle mit absorbierendem Material

Country Status (4)

Country Link
EP (1) EP0122840B1 (de)
AT (1) ATE29360T1 (de)
DE (1) DE3465862D1 (de)
FR (1) FR2543778A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481030A (en) * 1993-06-30 1996-01-02 Adir Et Compagnie Phosphonic acid compounds
US5536921A (en) * 1994-02-15 1996-07-16 International Business Machines Corporation System for applying microware energy in processing sheet like materials
WO2002049397A1 (fr) * 2000-12-11 2002-06-20 Centre National De La Recherche Scientifique (C.N.R.S.) Traitement par micro-ondes d'objets et de pieces unitaires

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708481B1 (fr) * 1993-08-02 1995-10-27 Chapuis Philippe Procédé et dispositif pour modifier l'entropie d'un système moléculaire polaire.
FR2775552B1 (fr) * 1998-02-27 2000-05-19 Standard Products Ind Dispositif de chauffage d'un materiau par micro-ondes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1440952A1 (de) * 1963-11-12 1969-04-24 Krupp Gmbh Vorrichtung zur Behandlung von Gut durch Mikrowellen
US3449836A (en) * 1967-10-25 1969-06-17 Bechtel Int Corp Air suspension system in microwave drying
SE378057B (de) * 1974-02-22 1975-08-11 Stiftelsen Inst Mikrovags
AU521896B2 (en) * 1976-11-17 1982-05-06 Jean, O.A.L. Apparatus for subjecting a material to electromagnetic waves
GB2013460A (en) * 1977-12-27 1979-08-08 Gen Electric Microwave oven
SE441640B (sv) * 1980-01-03 1985-10-21 Stiftelsen Inst Mikrovags Forfarande och anordning for uppvermning medelst mikrovagsenergi

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481030A (en) * 1993-06-30 1996-01-02 Adir Et Compagnie Phosphonic acid compounds
US5591728A (en) * 1993-06-30 1997-01-07 Adir Et Compagnie New phosphonic acid compounds
US5608045A (en) * 1993-06-30 1997-03-04 Adir Et Compagnie Preparation of phosphoramidon
US5536921A (en) * 1994-02-15 1996-07-16 International Business Machines Corporation System for applying microware energy in processing sheet like materials
WO2002049397A1 (fr) * 2000-12-11 2002-06-20 Centre National De La Recherche Scientifique (C.N.R.S.) Traitement par micro-ondes d'objets et de pieces unitaires

Also Published As

Publication number Publication date
DE3465862D1 (en) 1987-10-08
ATE29360T1 (de) 1987-09-15
EP0122840A1 (de) 1984-10-24
FR2543778A1 (fr) 1984-10-05

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