WO1988004127A2 - Procede et dispositif de rechauffage dielectrique - Google Patents
Procede et dispositif de rechauffage dielectrique Download PDFInfo
- Publication number
- WO1988004127A2 WO1988004127A2 PCT/FR1987/000461 FR8700461W WO8804127A2 WO 1988004127 A2 WO1988004127 A2 WO 1988004127A2 FR 8700461 W FR8700461 W FR 8700461W WO 8804127 A2 WO8804127 A2 WO 8804127A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- product
- hertz
- electrodes
- alternating voltage
- frequency
- 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.)
- Ceased
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
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S99/00—Foods and beverages: apparatus
- Y10S99/14—Induction heating
Definitions
- the present invention relates to a method and a device for heating by dielectric hysteresis of a product containing at least partially ice.
- the object of the present invention is in particular to remedy the drawbacks of known dielectric heating methods and proposes a method for heating by dielectric hysteresis of a product containing at least partially ice cream, which makes it possible to heat said frozen product and/or to appear at least molecules of liquid water in said product, with a controlled distribution in its volume or part of the latter.
- the method makes it possible, when liquid water appears, to hardly heat the liquid water obtained or the thawed parts of the product.
- the process according to the invention makes it possible, by choosing its duration of implementation and/or the voltage applied, whatever the mass of the product treated, to bring the product to a determined temperature below 0° C or to cause a determined proportion of liquid water to appear in its volume.
- the dielectric heating process according to the present invention is such that it consists in subjecting the product to an electric field created between two electrodes to which is applied an alternating voltage whose frequency is at a value between one kilo-hertz and six mega-hertz.
- the frequency of the alternating voltage applied to said electrodes can advantageously be between seven kilohertz and six megahertz, or between twenty kilohertz and six megahertz, or between seven kilohertz and one megahertz. hertz, or between twenty kilohertz and one megahertz.
- the method in accordance with the present invention may also advantageously consist, in a subsequent step following the appearance of molecules of liquid water in said product, in applying to the latter a second heating means, this second heating means possibly being a dielectric heating by magnetron at microwave or microwave frequencies, the frequency of which would for example be greater than five hundred mega-hertz.
- the method according to the present invention can advantageously consist of placing the product between two electrodes having facing surfaces. In this case, an effect of the process which is almost homogeneous will be obtained in the volume comprised between these surfaces. It can also consist of. placing a wire-type electrode in the product and a surface-type electrode facing the product. In this case, the effect of the process will be localized in the vicinity of the wire electrode.
- the dielectric heating method according to the present invention because it makes it possible to heat and/or cause liquid water molecules to appear in a frozen product, in a controlled manner, can obviously be used for heating and/or thawing of food products but can also be used for reheating and/or thawing, for example partial, of all frozen products and in particular of snow with a view to studying particular phenomena.
- the present invention will be better understood on studying dielectric heating devices implementing the dielectric heating method according to the present invention, described by way of non-limiting examples and illustrated by the drawing in which:
- FIG. 1 shows a first dielectric heating device in accordance with the present invention using flat electrodes, with which a second heating means is associated;
- FIG. 2 shows a second device in accordance with the present invention using an electrode of the cylindrical type and an electrode of the wire type.
- the dielectric heating device shown and marked generally by the reference 1 comprises a furnace 2 which delimits a furnace chamber 3, this furnace 2 of generally parallelepipedal shape having an enclosure 4 and an access door 4a to the chamber 3 which in the example constitutes a cover, the walls 4 and 4a of this oven 2 preferably being made of a thermal and electrical insulating material such as for example polyurethane.
- the device 1 comprises two parallel flat electrodes 5 and 6, with large surfaces, which are made of an electrically conductive material such as copper.
- Electrodes are connected, by electrical conductor wires 7 and 8 which extend in insulating sheaths and which pass through the walls of the furnace 2, to a known alternating voltage generator 9 whose structure does not need to be described. , this alternating voltage generator 9 allowing the production of an electric field between the electrodes 5 and 6, in the oven chamber 3.
- an extractable container 10 which rests on the bottom of the latter, opposite its cover 4a.
- This container 10 contains a frozen product 11 constituted for example by a block of ice, a block of snow, a frozen food product or any other product containing frozen water.
- Device 1 as just described operates as follows.
- the alternating voltage generator 9 applying to the electrodes 5 and 6 an alternating voltage whose frequency is at a value between one kilo-hertz and six mega-hertz, there is produced between the electrodes 5 and 6 an electric field which, by hysteresis dielectric, heats the frozen product 11. If the operation is maintained, liquid water molecules appear in the latter.
- said frequency band comprised between one kilohertz and six mega-hertz
- a frequency value for the alternating voltage applied to electrodes 5 and 6 comprised between seven kilo-hertz and six mega-hertz, comprised between twenty kilo-hertz and six megahertz, between seven kilo-hertz and one mega-hertz, or even between twenty kilo-hertz and one mega-hertz.
- an additional heating means which in the example is a known dielectric microwave heating means generally identified by the reference 12 placed in the wall and a voltage generator alternating current 14 supplying an alternating voltage whose frequency is greater than five hundred megahertz and preferably close to two thousand five hundred megahertz to obtain heating of the product 11 by microwaves.
- the alternating voltage generators 9 and 14 are connected to a control circuit 15 which can operate the device 1 in the following way and which need not be described.
- the control circuit 15 starts up the alternating voltage generator 9.
- the electric field created between the electrodes 5 and 6 heats the frozen product 11 and causes molecules of liquid water distributed throughout its volume.
- control circuit 15 can stop - The operation of the alternating voltage generator 9 and starts the second heating means 12 which is suitable for heating a product containing at least partially liquid water.
- a dielectric heating device identified generally by the reference 16 which comprises an enclosure 17 of cylindrical horizontal section which is made of a thermal and electrical insulating material such as for example polyurethane.
- an electrode 18 In this enclosure enclosure 17 is arranged, near the cylindrical inner wall, an electrode 18 of annular horizontal section. Inside this cylindrical electrode and resting on the bottom of the enclosure 17, there is an extractable container 19 in which a frozen product 20 is placed.
- the cylindrical electrode 18 is connected, via an electric wire 21 arranged in an insulating sheath, to an alternating voltage generator 22 which is also connected via a wire 23 arranged in an insulating sheath to a second wire electrode 24 extending from an insulating handle 25, this wire electrode 24 being pushed into the product 20 to be defrosted.
- the device 16 shown in Figure 2 and formed of the two electrodes 18 and 24 and the alternating voltage generator 22 operates in the same way as the device 1 shown in Figure 1 and formed of two electrodes 5 and 6 and the voltage generator alternatives 9.
- an electric field is produced in the product 20 to be defrosted, active in particular all around the wire electrode 24, for example in the part 26 delimited in FIG. this part 26, the product to be thawed 20 is heated and if the operation is maintained, molecules of liquid water appear without the liquid water appearing heating up. It is in particular possible to obtain a partial thawing of the product 20 in its part 26, this thawed part 26 being able to be extracted for any subsequent processing.
- Method for dielectrically reheating a product (11) containing at least partially ice, intended to reheat and/or make appear at least liquid water molecules within said product with- out practically reheating the liquid water occurring comprising the application to the product of an electric field generated between two electrodes (5, 6) to which is applied an alternating voltage of which the frequency has a value between one kilohertz and six megahertz.
- Method of dielectric heating of a product (11) at least partially containing ice, making it possible to heat and/or cause at least molecules of liquid water to appear in said product without substantially heating the liquid water which has appeared consisting in subjecting the product to an electric field created between two electrodes (5, 6) to which is applied an alternating voltage whose frequency is at a value between one kilo-hertz and six mega-hertz.
- Method for dielectrically reheating a product (11) containing at least partially ice, intended to reheat and/or make appear at least liquid water molecules within said product with- out practically reheating the liquid water occurring comprising the application to the product of an electric field generated between two electrodes (5, 6) to which is applied an alternating voltage of which the frequency has a value between one kilohertz and six megahertz.
- Method of dielectric heating of a product (11) at least partially containing ice, making it possible to heat and/or cause at least molecules of liquid water to appear in said product without substantially heating the liquid water which has appeared consisting in subjecting the product to an electric field created between two electrodes (5, 6) to which is applied an alternating voltage whose frequency is at a value between one kilo-hertz and six mega-hertz.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR86/16682 | 1986-11-28 | ||
| FR8616682A FR2607652A1 (fr) | 1986-11-28 | 1986-11-28 | Procede et dispositif de rechauffage par hysteresis dielectrique d'un produit contenant de la glace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1988004127A2 true WO1988004127A2 (fr) | 1988-06-02 |
| WO1988004127A3 WO1988004127A3 (fr) | 1988-06-30 |
Family
ID=9341366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1987/000461 Ceased WO1988004127A2 (fr) | 1986-11-28 | 1987-11-24 | Procede et dispositif de rechauffage dielectrique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4910371A (fr) |
| EP (1) | EP0292520A1 (fr) |
| JP (1) | JPH01502947A (fr) |
| FR (1) | FR2607652A1 (fr) |
| WO (1) | WO1988004127A2 (fr) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998005186A1 (fr) * | 1996-07-25 | 1998-02-05 | Ea Technology Limited | Traitement de materiaux a frequences radioelectriques et a hyperfrequences |
| US6344635B2 (en) | 1999-12-28 | 2002-02-05 | Corning Incorporated | Hybrid method for firing of ceramics |
| US6344634B2 (en) | 1999-12-28 | 2002-02-05 | Corning Incorporated | Hybrid method for firing of ceramics |
| US6537481B2 (en) | 1999-12-28 | 2003-03-25 | Corning Incorporated | Hybrid method for firing of ceramics |
| WO2017176721A1 (fr) * | 2016-04-08 | 2017-10-12 | Illinois Tool Works Inc. | Appareil pour chauffer simultanément une pluralité de produits alimentaires |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5652006A (en) * | 1992-10-09 | 1997-07-29 | Unilever Patent Holdings B.V. | Method of heat processing foodstuff |
| US5378319A (en) * | 1993-05-07 | 1995-01-03 | Tran Industrial Research Inc. | Lime mud calcining using dielectric hysteresis heating |
| US5512737A (en) * | 1994-05-09 | 1996-04-30 | Henny Penny Corporation | Oven liner for dielectric oven |
| US5541392A (en) * | 1994-05-09 | 1996-07-30 | Henny Penny Corporation | Product tray for dielectric oven |
| US6323473B1 (en) * | 1997-08-14 | 2001-11-27 | Yamamoto Vinita Co., Ltd. | Packed food pasteurizing device and pasteurizing method |
| CN102427832A (zh) * | 2009-03-30 | 2012-04-25 | 耶路撒冷希伯来大学的伊森研究发展公司 | 用于在存储期间利用脉冲电能防止对材料的生物污染的设备、系统和方法 |
| CO6260012A1 (es) * | 2009-09-09 | 2011-03-22 | Ind De Alimentos Zenu S A S | Descongelador ohmico para alimentos y proceso |
| KR101560692B1 (ko) * | 2013-12-26 | 2015-10-15 | 동부대우전자 주식회사 | 통전 가열 방식의 전자 레인지 |
| US8795444B1 (en) | 2014-02-21 | 2014-08-05 | Ut-Battelle, Llc | Method of and apparatus for thermomagnetically processing a workpiece |
| DE202017100453U1 (de) * | 2017-01-27 | 2018-02-01 | Deutsches Institut Für Lebensmitteltechnik E.V. | Vorrichtung zur kontinuierlichen Behandlung mit gepulstem elektrischem Feld |
| SE2450808A1 (en) * | 2024-07-12 | 2025-09-30 | RadAnt BioPhysics AB | A device for heating a sample |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1015548A (fr) * | 1947-10-29 | 1952-10-14 | Sidney Blumenthal & Co | Méthode et appareillage pour le traitement électrique des fibres textiles en vue de la réduction de leur élasticité et en vue de l'augmentation de leur résistance à l'extension |
| US2761940A (en) * | 1951-04-02 | 1956-09-04 | Julius W Mann | Immersion high frequency heating apparatus and method |
| US2821611A (en) * | 1954-03-18 | 1958-01-28 | Julius W Mann | Arcuate, cylindrical and cup-shaped composite r. f. electrodes |
| US4296299A (en) * | 1979-12-31 | 1981-10-20 | General Electric Company | Apparatus for thawing frozen food in a refrigeration appliance |
| DE3165460D1 (en) * | 1980-12-17 | 1984-09-13 | Matsushita Electric Industrial Co Ltd | Microwave heat cooking device |
| AU1614183A (en) * | 1982-07-07 | 1984-01-12 | Toxic-Hazardous Wast Destruction Inc. | Generating high temperatures for destruction of waste |
| JPS60217930A (ja) * | 1984-04-03 | 1985-10-31 | 株式会社 同和 | 通電加工食品の製造方法 |
| US4739140A (en) * | 1985-05-14 | 1988-04-19 | David Reznik | Apparatus and method for electrical heating of food products |
| NL8602956A (nl) * | 1986-11-21 | 1988-06-16 | I K International B V | Inrichting voor het verhitten van een produkt door middel van dielektrische hoogfrequent verhitting. |
-
1986
- 1986-11-28 FR FR8616682A patent/FR2607652A1/fr not_active Withdrawn
-
1987
- 1987-11-24 WO PCT/FR1987/000461 patent/WO1988004127A2/fr not_active Ceased
- 1987-11-24 JP JP63500065A patent/JPH01502947A/ja active Pending
- 1987-11-24 EP EP87907779A patent/EP0292520A1/fr not_active Withdrawn
- 1987-11-24 US US07/245,317 patent/US4910371A/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998005186A1 (fr) * | 1996-07-25 | 1998-02-05 | Ea Technology Limited | Traitement de materiaux a frequences radioelectriques et a hyperfrequences |
| AU739805B2 (en) * | 1996-07-25 | 2001-10-18 | Anglo Operations Limited | Radio-frequency and microwave-assisted processing of materials |
| US6350973B2 (en) | 1996-07-25 | 2002-02-26 | Ea Technology Limited | Radio-frequency and microwave-assisted processing of materials |
| US6344635B2 (en) | 1999-12-28 | 2002-02-05 | Corning Incorporated | Hybrid method for firing of ceramics |
| US6344634B2 (en) | 1999-12-28 | 2002-02-05 | Corning Incorporated | Hybrid method for firing of ceramics |
| US6537481B2 (en) | 1999-12-28 | 2003-03-25 | Corning Incorporated | Hybrid method for firing of ceramics |
| WO2017176721A1 (fr) * | 2016-04-08 | 2017-10-12 | Illinois Tool Works Inc. | Appareil pour chauffer simultanément une pluralité de produits alimentaires |
| CN109315026A (zh) * | 2016-04-08 | 2019-02-05 | 伊利诺斯工具制品有限公司 | 用于同时加热多个食品的设备 |
| US10638558B2 (en) | 2016-04-08 | 2020-04-28 | Illinois Tool Works, Inc. | Apparatus for simultaneously heating a plurality of food products |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0292520A1 (fr) | 1988-11-30 |
| JPH01502947A (ja) | 1989-10-05 |
| US4910371A (en) | 1990-03-20 |
| FR2607652A1 (fr) | 1988-06-03 |
| WO1988004127A3 (fr) | 1988-06-30 |
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