EP3389339A1 - Système de chauffage à micro-ondes modulaire hybride ayant des cavités séparables - Google Patents

Système de chauffage à micro-ondes modulaire hybride ayant des cavités séparables Download PDF

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Publication number
EP3389339A1
EP3389339A1 EP17165679.6A EP17165679A EP3389339A1 EP 3389339 A1 EP3389339 A1 EP 3389339A1 EP 17165679 A EP17165679 A EP 17165679A EP 3389339 A1 EP3389339 A1 EP 3389339A1
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EP
European Patent Office
Prior art keywords
heating
cavity
microwave
semi
conductive heating
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.)
Granted
Application number
EP17165679.6A
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German (de)
English (en)
Other versions
EP3389339B1 (fr
Inventor
Hong-I Chang
Kuang-Tse Chin
Ya-Chun Yu
Jung-Kuei Hsieh
Chien-Hung Lin
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Bottle Top Machinery Co Ltd
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Bottle Top Machinery Co Ltd
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Publication date
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Priority to EP17165679.6A priority Critical patent/EP3389339B1/fr
Publication of EP3389339A1 publication Critical patent/EP3389339A1/fr
Application granted granted Critical
Publication of EP3389339B1 publication Critical patent/EP3389339B1/fr
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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
    • H05B6/80—Apparatus for specific applications
    • 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
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques

Definitions

  • the present invention relates to a system for heating objects. More particularly, it relates to a hybrid modular microwave heating system with separable cavities.
  • Heating is one of the basic industrial food processes.
  • Methods of heating includes contact heating (heating sources include fire, sheathed heaters, and ceramic heaters), microwave heating, electromagnetic induction heating and more.
  • Contact heating is a conventional heating method. It requires a longer period of heating time since the temperature of a heat-receiving object rises from its exterior and the heat is gradually transmitted to its interior.
  • Microwave is a kind of electromagnetic wave. Microwaves with specific frequencies enable the polar molecules of the heat-receiving object (for example, water) to resonate, so that the heating begins from the internal of the objects rapidly. When the microwaves start heating the object, however, its intensity distribution thereof will vary according to factors such as the interactions between the microwave power generator, resonant cavity, the heat-receiving object and so on, thereby leading to uneven heating in certain parts.
  • hot fluids such as hot water or hot steam
  • additional heating mediums US7119313B2 , US4962298 .
  • the heat-receiving object is packed inside a sealed container in advance, then sent into a microwave resonant cavity filled with high-pressure fluids.
  • the object in the sealed container is heated by the microwaves and the fluids.
  • the microwave resonant cavity must be pressurized internally so that the pressure inside the microwave resonant cavity counteracts the outward expansion pressure of the sealed container.
  • the microwave resonant cavity may cause the unheated sealed container to collapse, while insufficient pressure in the microwave resonant cavity will not be able to resist the outward expansion pressure of the sealed container after it is heated, thereby causing a leakage of the sealed container. Since the maximum heating temperature is in proportion with the exerted pressure, this significantly limits the designing of the heating process.
  • microwave heating requires a suitable resonant cavity to accommodate the heat-receiving object during heating.
  • the cavities in the applications thereof are all fixed structures, wherein the heat-receiving object is merely placed in a heating plate or pan, without any means of keeping the object in tight contact with the heating source.
  • the primary purpose of the present invention is to provide a composite microwave heating system in which each heating cavity accommodating a package of heat-receiving object is separable and modularized.
  • the system of the present invention is operated without the need of heat-transferring fluids and counter-balancing pressure.
  • the cavities are modular and can be separated into two parts, the heat-receiving object can be taken out for measurement in any part of the heating process. This means any changes of quality in the heat-receiving object can be detected immediately. Therefore the heating power, and the length of the heating time, heat holding time and cooling time can be adjusted at any time of the heating process, making this heating system flexible enough to meet the needs of various heating processes.
  • the present invention comprises a microwave heating semi-cavity, a conductive heating semi-cavity, a conductive heating unit, a microwave heating unit and a sealed container.
  • the conductive heating unit provides a conductive heating source, while the microwave heating unit is used to generate microwaves.
  • the sealed container accommodates a heat-receiving object. And the microwave heating semi-cavity and the conductive heating semi-cavity can be assembled to form a microwave resonant cavity. The heat-receiving object is packed in the sealed container and then placed in the microwave resonant cavity.
  • the microwave heating semi-cavity includes a microwave guiding device (such as a waveguide, etc.) that can deliver the microwaves radiated by the microwave heating unit into the microwave resonant cavity to heat up the object in the sealed container.
  • the conductive heating semi-cavity has a microwave-transparent lid used to press against the sealed container inside the conductive heating semi-cavity, thereby making the sealed container in close contact with the inner wall thereof.
  • the conductive heating semi-cavity is made of materials with good thermal conductivity and can thus receive heat from the conductive heating unit, which enables heating up the object in the sealed container by conduction heating.
  • the hot steam, hot vapor or volume expansion due to the rise of temperature inside the object will produce an outward expansion pressure on the sealed container.
  • the conductive heating semi-cavity lid and the conductive heating semi-cavity of the present invention are configured to have the sufficient mechanical strengths to resist the structural deformation of the sealed container in order to prevent leakage.
  • the system of the present invention can individually or simultaneously use microwave and traditional heating methods to heat the objects.
  • Microwave heating can rapidly increase the temperature of the heat-receiving object in the sealed container therefore causing it to expand and press the sealed container against the conductive heating semi-cavity. As a result, it makes the contact heating of the conductive heating unit to the heat-receiving object more efficient.
  • the present invention adopts means that are different from conventional techniques that apply high-pressure water, vapor, steam, etc. to resist the outward expansion pressure of the sealed container.
  • This allows the system to be operated under atmospheric environment.
  • the pressure-resisting design of the present invention does not exert pressure on the sealed container, it therefore causes no deformation of the unheated sealed container.
  • the heating temperature in the present invention can be higher than conventional heating systems could ever allow, so as to meet the needs of most thermal processes.
  • the conductive heating semi-cavity and the microwave heating semi-cavity are assembled to form the microwave resonant cavity during microwave heating.
  • the present invention has the flexibility to arrange for subsequent processes of heat holding, cooling and so forth in order to meet processing needs.
  • the present invention provides a hybrid modular microwave heating system with separable cavities used to heat objects (heat-receiving objects are not shown in the drawings).
  • the claimed system comprises a microwave heating semi-cavity 30, a conductive heating semi-cavity 40 a conductive heating unit 20, a microwave heating unit 70 and a sealed container 10.
  • the sealed container 10 accommodates the heat-receiving object.
  • the conductive heating unit 20 can be an electromagnetic heater, a gas heater, an infrared lamp, a heater strip, or any other heating source that is able to transmit heat to the conductive heating semi-cavity 40.
  • the most preferable is an electromagnetic induction heater which generates heat into a conductive heating semi-cavity body 41 through high-frequency electromagnetic waves.
  • the heating power of the conductive heating unit 20 can be adjusted by a conductive heating power controller 80.
  • the conductive heating semi-cavity 40 comprised of the conductive heating semi-cavity body 41 as mentioned and also a conductive heating semi-cavity lid 42.
  • the conductive heating semi-cavity body 41 includes a conductive heating semi-cavity inner wall 411, a receiving space 412 formed by the conductive heating semi-cavity inner wall 411, and a conductive heating semi-cavity outer wall 413.
  • the conductive heating semi-cavity lid 42 is made of microwave-transparent materials.
  • the conductive heating semi-cavity lid 42 and the conductive heating semi-cavity body 41 each possesses a fastening mean so that they can be locked together as one or opened into two.
  • the sealed container 10 is accommodated in the receiving space 412.
  • the conductive heating semi-cavity lid 42 When the conductive heating semi-cavity lid 42 is locked to the conductive heating semi-cavity body 41, the conductive heating semi-cavity lid 42 presses tightly against the sealed container 10. And as the object expands in volume or produces steam or vapor after being heated, the sealed container 10 will expand, pressing more tightly against the conductive heating semi-cavity inner wall 411.
  • the expansion pressure of the sealed container 10 is sustained and counteracted by the mechanical strength of the conductive heating semi-cavity lid 42 and the conductive heating semi-cavity body 41 with no risk of leakage or damage.
  • the heating temperature can be greatly increased.
  • the material of the conductive heating semi-cavity body 41 is preferably ferromagnetic and not microwave-penetrable (microwaves at such frequencies as 2.45GHz or 915MHz, etc.) so that when it is exposed to high-frequency electromagnetic waves (at frequencies such as 10KHz ⁇ 200KHz), eddy current can be induced to generate heat.
  • the conductive heating semi-cavity 40 is placed on top of the conductive heating unit 20 to receive heat from the heating source, to heat the conductive heating semi-cavity body 41.
  • the microwave heating semi-cavity 30 includes a wave guiding channel 31, a microwave heating semi-cavity sleeve 32 and a microwave heating semi-cavity body 33.
  • the microwave heating semi-cavity sleeve 32 presses down against the conductive heating semi-cavity outer wall 413 as illustrated in Fig. 3 .
  • the interior of the microwave heating semi-cavity body 33 and the receiving space 412 inside the conductive heating semi-cavity 40 will form an integrated microwave resonant cavity.
  • the sealed container 10, with the heat-receiving object, and the conductive heating semi-cavity lid 42 are accommodated inside the microwave resonant cavity.
  • the heat-receiving object placed inside the sealed container 10 thus becomes the only receiver of microwaves in the microwave resonant cavity.
  • the conventional microwave leak-proof devices or structures such as choke isolation metal rings or microwave damping structures, can be further arranged in the interfaces of the microwave heating semi-cavity sleeve 32 and the conductive heating semi-cavity outer wall 413.
  • the microwave heating unit 70 generates microwaves as a microwave heating source.
  • the microwaves are propagated into the microwave resonant cavity via the wave guiding channel 31.
  • the microwave heating unit 70 is further equipped with a microwave intensity adjusting function. This allows the operator to adjust the intensity of the microwave heating power, and control the length of the heating time during the process.
  • the present invention further comprises a spinning plate 50 that rotates, on which the conductive heating semi-cavity 40 is loaded, and a motor 51.
  • the spinning plate 50 is equipped with a driven gear 501, preferably an outer ring gear as shown in Fig. 2 and Fig. 3 , while the motor 51 is equipped with a gear 52.
  • the power of the motor 51 is transmitted via the gear 52 in contact with the driven gear 501 to rotate the spinning plate 50.
  • Rotation of the conductive heating semi-cavity 40 on the spinning plate 50, as well as the sealed container 10 inside the conductive heating semi-cavity 40 improves heating uniformity. As a result, problems of uneven heating in the past are reduced significantly.
  • FIG. 4 A practical system application of the present invention is illustrated in Fig. 4 .
  • the microwave heating unit 70, the microwave heating semi-cavity 30, the conductive heating unit 20, the conductive heating power controller 80, the spinning plate 50 and the motor 51 are grouped in view to constitute the composite heating module 60.
  • one preferred embodiment includes several composite heating modules 60 in annular arrangement on a rotating device 61.
  • the rotating device 61 can be a rotating circular disk or a conveyor belt arranged in a circle.
  • the heat-receiving object is placed in the sealed container 10, and the sealed container 10 is further placed and locked inside the conductive heating semi-cavity 40.
  • Fig. 4 A practical system application of the present invention is illustrated in Fig. 4 .
  • the microwave heating unit 70, the microwave heating semi-cavity 30, the conductive heating unit 20, the conductive heating power controller 80, the spinning plate 50 and the motor 51 are grouped in view to constitute the composite heating module 60.
  • one preferred embodiment includes several composite heating modules 60 in annular arrangement on a rotating
  • the loaded conductive heating semi-cavity 40 is fed into at one side of the rotating device 61 and then assembled with the microwave heating semi-cavity 30, forming the composite heating module 60 with a microwave resonant cavity.
  • the microwave heating unit 70 and the conductive heating unit 20 of the composite heating module 60 heat up the object inside each of the conductive heating semi-cavity 40.
  • the conductive heating unit 20 is equipped with the conductive heating power controller 80 in order to adjust the heating power.
  • the conductive heating semi-cavity 40 is separated from the microwave heating semi-cavity 30 at another side of the rotating device 61.
  • the conductive heating semi-cavity 40 Since the conductive heating semi-cavity 40 have already left microwave influence, the measurements of the heated object are conducted without the influences of the microwave interference or effect. The accuracy of the measurements (such as temperature or color) can be accordingly achieved.
  • the conductive heating semi-cavity 40 carrying the sealed container 10 can be transferred to additional heating, holding or cooling processes. As a result, the present invention can be adjusted to fit in any production line, such as foodstuff cooking, sterilization or bactericidal processing, to meet specific needs of different heating processes.
  • the present invention has the following advantages:

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP17165679.6A 2017-04-10 2017-04-10 Système de chauffage à micro-ondes modulaire hybride ayant des cavités séparables Active EP3389339B1 (fr)

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EP17165679.6A EP3389339B1 (fr) 2017-04-10 2017-04-10 Système de chauffage à micro-ondes modulaire hybride ayant des cavités séparables

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EP17165679.6A EP3389339B1 (fr) 2017-04-10 2017-04-10 Système de chauffage à micro-ondes modulaire hybride ayant des cavités séparables

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EP3389339A1 true EP3389339A1 (fr) 2018-10-17
EP3389339B1 EP3389339B1 (fr) 2019-05-08

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542009A1 (fr) * 1983-03-01 1984-09-07 Leluan Georges Nouveau dispositif de dissolution et de sterilisation rapide et methode utilisant ce dispositif
US4900884A (en) 1987-11-28 1990-02-13 Kabushiki Kaisha Toshiba Composite cooking system having microwave heating and induction heating
US4962298A (en) 1988-07-18 1990-10-09 Barilla G.E.R. F.LII-Societa per Azoni Machine for thermally treating and sterilizing pre-packaged food articles by means of microwaves
US5177333A (en) 1990-07-05 1993-01-05 Mitsubishi Denki Kabushiki Kaisha High frequency cooking device having electromagnetic induction heater
US5548101A (en) 1993-12-15 1996-08-20 Samsung Electronics Co., Ltd. Microwave oven with a function of induction heating and the control method thereof
US6864468B2 (en) 2003-01-23 2005-03-08 Lg Electronics, Inc. Electric oven applying an induction heating at both sides of the cavity
US7119313B2 (en) 2003-09-08 2006-10-10 Washington State University Research Foundation Apparatus and method for heating objects with microwaves
US20090230124A1 (en) 2008-03-13 2009-09-17 Krones Ag Apparatus and method for heating containers
US20100051612A1 (en) * 2008-08-29 2010-03-04 Hans Magnus Fagrell Microwave heater and method of heating
EP2329751A1 (fr) * 2009-12-04 2011-06-08 ELECTROLUX PROFESSIONAL S.p.A. Appareil de cuisine
EP2447172A1 (fr) * 2010-11-02 2012-05-02 Stefano Boido Dispositif pour chauffer des récipients

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542009A1 (fr) * 1983-03-01 1984-09-07 Leluan Georges Nouveau dispositif de dissolution et de sterilisation rapide et methode utilisant ce dispositif
US4900884A (en) 1987-11-28 1990-02-13 Kabushiki Kaisha Toshiba Composite cooking system having microwave heating and induction heating
US4962298A (en) 1988-07-18 1990-10-09 Barilla G.E.R. F.LII-Societa per Azoni Machine for thermally treating and sterilizing pre-packaged food articles by means of microwaves
US5177333A (en) 1990-07-05 1993-01-05 Mitsubishi Denki Kabushiki Kaisha High frequency cooking device having electromagnetic induction heater
US5548101A (en) 1993-12-15 1996-08-20 Samsung Electronics Co., Ltd. Microwave oven with a function of induction heating and the control method thereof
US6864468B2 (en) 2003-01-23 2005-03-08 Lg Electronics, Inc. Electric oven applying an induction heating at both sides of the cavity
US7119313B2 (en) 2003-09-08 2006-10-10 Washington State University Research Foundation Apparatus and method for heating objects with microwaves
US20090230124A1 (en) 2008-03-13 2009-09-17 Krones Ag Apparatus and method for heating containers
US20100051612A1 (en) * 2008-08-29 2010-03-04 Hans Magnus Fagrell Microwave heater and method of heating
EP2329751A1 (fr) * 2009-12-04 2011-06-08 ELECTROLUX PROFESSIONAL S.p.A. Appareil de cuisine
EP2447172A1 (fr) * 2010-11-02 2012-05-02 Stefano Boido Dispositif pour chauffer des récipients
US20120103976A1 (en) 2010-11-02 2012-05-03 Microwine S.r.l. Apparatus for heating containers

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