EP0621740A2 - Méthode pour chauffer, pasteuriser et stériliser uniformement un produit par micro-ondes - Google Patents

Méthode pour chauffer, pasteuriser et stériliser uniformement un produit par micro-ondes Download PDF

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Publication number
EP0621740A2
EP0621740A2 EP94106167A EP94106167A EP0621740A2 EP 0621740 A2 EP0621740 A2 EP 0621740A2 EP 94106167 A EP94106167 A EP 94106167A EP 94106167 A EP94106167 A EP 94106167A EP 0621740 A2 EP0621740 A2 EP 0621740A2
Authority
EP
European Patent Office
Prior art keywords
microwave
pulses
products
power
product
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
EP94106167A
Other languages
German (de)
English (en)
Other versions
EP0621740B1 (fr
EP0621740A3 (fr
Inventor
Klaus Dipl.-Phys. Koch
Rolf Dipl.-Ing. Skubich
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.)
KraussMaffei Berstorff GmbH
Original Assignee
Hermann Berstorff Maschinenbau GmbH
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 Hermann Berstorff Maschinenbau GmbH filed Critical Hermann Berstorff Maschinenbau GmbH
Publication of EP0621740A2 publication Critical patent/EP0621740A2/fr
Publication of EP0621740A3 publication Critical patent/EP0621740A3/fr
Application granted granted Critical
Publication of EP0621740B1 publication Critical patent/EP0621740B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B6/64—Heating using microwaves
    • H05B6/78—Arrangements for continuous movement of material
    • H05B6/782—Arrangements for continuous movement of material wherein the material moved is food
    • 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
    • H05B6/66—Circuits
    • H05B6/666—Safety circuits

Definitions

  • the invention relates to a method and a device as described in the preamble of the first claim.
  • a generic method is known from the applicant's DE-PS 38 30 867.
  • a pulse-like, intermittent feeding of the microwave energy required for heating to a certain temperature ensures that the product surface does not heat up undesirably.
  • Different forms of microwave power are used.
  • a rectangular form of performance has the greatest influence on the product surface. But even with trapezoidal or sinusoidal waveforms, useful results are achieved with a pulse operation of the system.
  • a pulsed, intermittent energy feed into the products to be treated makes sense, because otherwise the microwave energy fed in (power x time) is too high in relation to the temporal absorption capacity of the product, i.e. there is a critical increase in the temperature of the product surface.
  • a pulse-like energy coupling means an energy supply with a certain length of time and repetition.
  • the aim is to achieve an increase in the absorbed energy in the product in a shorter time, with higher output and thus an increase in the belt speed or the output of a continuous system for heating, pasteurizing and sterilizing food in packaged or loose form without any critical signs of overheating occur on the product surface.
  • the aim is to increase the amount of energy absorbed by the product in a certain time without damage.
  • An energy pulse with an almost rectangular power profile is used for rapid heating of the products, which results in a considerable increase in the amount of energy absorbed without causing an excessive increase in the temperature of the product surface or inside the product.
  • magnetron e.g. 1.2 kW nominal power output power pulses in the range of microseconds that are greater than 1.2 kW.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
EP94106167A 1993-04-23 1994-04-21 Méthode pour chauffer, pasteuriser et stériliser uniformement un produit par micro-ondes Expired - Lifetime EP0621740B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4313275 1993-04-23
DE4313275 1993-04-23

Publications (3)

Publication Number Publication Date
EP0621740A2 true EP0621740A2 (fr) 1994-10-26
EP0621740A3 EP0621740A3 (fr) 1994-12-21
EP0621740B1 EP0621740B1 (fr) 1997-09-03

Family

ID=6486168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94106167A Expired - Lifetime EP0621740B1 (fr) 1993-04-23 1994-04-21 Méthode pour chauffer, pasteuriser et stériliser uniformement un produit par micro-ondes

Country Status (4)

Country Link
US (1) US5440104A (fr)
EP (1) EP0621740B1 (fr)
JP (1) JPH0747107A (fr)
DE (1) DE59403920D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5830409A (en) * 1996-01-04 1998-11-03 American Sterilizer Company Method to shorten aeration after a sterilization cycle
AU733292B2 (en) * 1997-06-11 2001-05-10 Amcor Packaging (Australia) Pty Ltd Preferential heating of materials by use of non-ionising electromagnetic radiation
AUPO728797A0 (en) 1997-06-11 1997-07-03 Containers Pty Ltd Preferential heating of materials by use of non-ionising electromagnetic radiation
US6084226A (en) 1998-04-21 2000-07-04 Cem Corporation Use of continuously variable power in microwave assisted chemistry
US6638475B1 (en) 2000-11-08 2003-10-28 The Regents Of The University Of California Method for inhibiting pathogenic and spoilage activity in products
US20060024195A1 (en) * 2004-07-27 2006-02-02 The Regents Of The University Of California Non-thermal disinfestation of biological pests with pulsed radio frequency power systems
KR100821917B1 (ko) * 2005-12-20 2008-04-17 주식회사 대우일렉트로닉스 전자레인지의 과열 방지 방법
CN101873808A (zh) * 2007-08-28 2010-10-27 得克萨斯技术大学联合体 保存食品的方法和系统
US10383349B2 (en) 2013-11-04 2019-08-20 Colgate-Palmolive Company Post-packaging pasteurization

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240474A2 (fr) * 1986-03-03 1987-10-07 Tetra Pak Processing Systems Aktiebolag Procédé de stabilisation par la chaleur
EP0366867A2 (fr) * 1988-10-11 1990-05-09 HERMANN BERSTORFF Maschinenbau GmbH Procédé et appareil de chauffage homogène à l'aide de micro-ondes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1074406A (fr) * 1975-12-18 1980-03-25 Henry M. Israel Four a micro-ondes a alimentation haute frequence
US4296296A (en) * 1979-08-13 1981-10-20 General Electric Company Controllable-duty-cycle power supply for microwave oven magnetron and the like
US4593167A (en) * 1982-08-02 1986-06-03 Nilssen Ole K Electronic microwave oven power supply
US4825028A (en) * 1987-12-28 1989-04-25 General Electric Company Magnetron with microprocessor power control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240474A2 (fr) * 1986-03-03 1987-10-07 Tetra Pak Processing Systems Aktiebolag Procédé de stabilisation par la chaleur
EP0366867A2 (fr) * 1988-10-11 1990-05-09 HERMANN BERSTORFF Maschinenbau GmbH Procédé et appareil de chauffage homogène à l'aide de micro-ondes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FOOD TECHNOLOGY, Bd.46, Nr.12, 1. Dezember 1992, CHICAGO, ILL., US Seiten 62 - 63, XP331050 W. SCHLEGEL 'Commercial Pasteurization and Sterilization of Food Products Using Microwave Technology' *

Also Published As

Publication number Publication date
DE59403920D1 (de) 1997-10-09
JPH0747107A (ja) 1995-02-21
EP0621740B1 (fr) 1997-09-03
US5440104A (en) 1995-08-08
EP0621740A3 (fr) 1994-12-21

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