EP0639748A1 - Dispositif pour la mise en oeuvre d'un procédé de séchage - Google Patents

Dispositif pour la mise en oeuvre d'un procédé de séchage Download PDF

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Publication number
EP0639748A1
EP0639748A1 EP94112653A EP94112653A EP0639748A1 EP 0639748 A1 EP0639748 A1 EP 0639748A1 EP 94112653 A EP94112653 A EP 94112653A EP 94112653 A EP94112653 A EP 94112653A EP 0639748 A1 EP0639748 A1 EP 0639748A1
Authority
EP
European Patent Office
Prior art keywords
microwave
drying
carrying
arrangement
vacuum
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
Application number
EP94112653A
Other languages
German (de)
English (en)
Inventor
Herbert Nachlinger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0639748A1 publication Critical patent/EP0639748A1/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/003—Small self-contained devices, e.g. portable

Definitions

  • the invention relates to an arrangement for carrying out a drying process, relating to drying goods in the household area, using microwave energy and vacuum technology.
  • the object of the invention is to develop an arrangement for carrying out a drying process, wherein microwave energy and vacuum technology are advantageously combined.
  • the arrangement according to the invention for solving this problem is characterized in that a microwave and vacuum-tight drying room of a drying device is equipped with at least one coupling point for microwave energy, a material to be treated, a microwave-proof suction opening and a microwave-and vacuum-tight loading opening.
  • the figure shows a basic arrangement for carrying out a drying process.
  • a vacuum drying device 1 consisting of a drying room 2, microwave coupling openings 3, microwave generators 4, items to be treated 5, waveguides 6, a loading opening 7, a vacuum pump unit 8 and a suction opening 9 can be seen.
  • the drying device 1 has two microwave generator waveguide units 4, 6, each of which has two microwave coupling openings 3, which must be covered in a vacuum-tight manner towards the waveguide 6.
  • the hole coupling units are arranged spatially offset from one another, for example in the ceiling surface and a side wall surface.
  • the actual drying room 2 can have a plurality of items 5 to be treated, whereby it is again advantageous that two hole coupling units act on the items to be treated in different energy input directions.
  • the coupling points 3 of the hole coupling units are sealed in a vacuum-tight manner by glass ceramic plates fastened with silicone adhesive. This ensures that the radiation of the energy into the drying room is not significantly reduced by the cover, since glass ceramic plates have a low ⁇ value.
  • the vacuum pump unit 8 which is spatially separated from the drying room 2, is connected to the drying room 2 via a suction opening 9, the suction opening 9 being microwave-sealed to the vacuum pump unit 8 by a metallic perforated grille.
  • the vacuum pump unit creates a basic vacuum of the order of about 10 ⁇ 2 Torr.
  • the vacuum pump unit 8 can also have a steam condenser.
  • the loading opening 7 which is a vacuum and microwave-tight door, is used.
  • a microwave and vacuum seal in the form of a circumferential ferromagnetic band is used on the circumference of the loading opening 7 opposite a frame of the drying room 2, additional microwave filtering techniques being arranged in parallel directly in the loading opening 7.
  • the loading opening 7 can have a see-through window, which must then also be microwave-proof, predominantly using a metallic grid. For the operating case of the drying device 1, it must be ensured that the loading opening 7 cannot then be actuated.
  • the drying room 2 can contain a plurality of items 5 to be treated, in particular when the nature of the items to be dried makes it necessary to allow drying processes to take place in several levels.
  • the arrangement of a plurality of hole coupling units for the transmission of microwave energy has proven to be advantageous.
  • the loading of the drying room 2 with sufficiently necessary microwave energy, based on the dielectric constant ⁇ of the material to be dried, can make the multiple use of small microwave transmitters, which can be distributed over an entire side and / or top surface, appear economically sensible.
  • Microwave generators in the form of the magnetron units with waveguide used are then replaced by the self-contained ones Smallest microwave transmitters can be replaced.
  • the drying room 2 can be designed as both a table and household appliance when it comes to drying food in the smallest quantity range.
  • drying room 2 Larger treatment rooms, shown here as drying room 2, are necessary for drying significantly larger quantities of raw materials, food, laundry and non-metallic materials.
  • microwave energy and vacuum technology has the advantages in particular that substances which can be warmed well with microwave energy can be heated directly and quickly due to the considerable depth of penetration of microwave energy and, in combination, get reduced liquid boiling points through the use of vacuum, which results in short process times for drying processes and significantly lower overall temperatures, which in addition to considerable energy and time savings also treats the dry goods gently.
  • This combination of drying is also suitable for geometrically complex, non-metallic materials or finished parts.
  • the solution according to the invention has the advantage over the previous vacuum drying processes and conventional drying processes that the drying times are greatly shortened and the use of thermal energy is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP94112653A 1993-08-20 1994-08-12 Dispositif pour la mise en oeuvre d'un procédé de séchage Ceased EP0639748A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934328086 DE4328086A1 (de) 1993-08-20 1993-08-20 Anordnung zur Durchführung eines Trocknungsverfahrens
DE4328086 1993-08-20

Publications (1)

Publication Number Publication Date
EP0639748A1 true EP0639748A1 (fr) 1995-02-22

Family

ID=6495669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112653A Ceased EP0639748A1 (fr) 1993-08-20 1994-08-12 Dispositif pour la mise en oeuvre d'un procédé de séchage

Country Status (2)

Country Link
EP (1) EP0639748A1 (fr)
DE (1) DE4328086A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375811A (en) * 2001-05-24 2002-11-27 John Richard Haig A dryer for textiles, utilising low pressure and microwave heating
US8216623B2 (en) 2009-04-07 2012-07-10 Frito-Lay North America, Inc. Flavor infused nut snack
US8689461B1 (en) 2012-11-08 2014-04-08 TekDry, LLC Dryer for portable electronics
US9746241B2 (en) 2012-02-01 2017-08-29 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US9970708B2 (en) 2012-02-01 2018-05-15 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10240867B2 (en) 2012-02-01 2019-03-26 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10690413B2 (en) 2012-02-01 2020-06-23 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10876792B2 (en) 2012-02-01 2020-12-29 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US11035612B1 (en) * 2013-03-14 2021-06-15 International Research Institute Inc. Microwave and vacuum drying device, system, and related methods
US11713924B2 (en) 2012-02-01 2023-08-01 Revive Electronics, LLC Methods and apparatuses for drying electronic devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10164299A1 (de) 2001-12-28 2003-07-17 Linn High Therm Gmbh Mikrowellenofensystem

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276138A (en) * 1962-09-21 1966-10-04 Miwag Mikrowellen Ag Microwave drying apparatus
FR1499628A (fr) * 1965-10-25 1967-10-27 Patelhold Patentverwertung Tunnel pour le traitement par micro-ondes
US3854219A (en) * 1973-06-18 1974-12-17 Gen Electric Electronic dryer
US4250628A (en) * 1979-06-21 1981-02-17 Smith Richard D Microwave fabric dryer method and apparatus
US4622446A (en) * 1982-12-09 1986-11-11 House Food Industrial Company Ltd. Microwave drying apparatus and use thereof
US4664924A (en) * 1982-12-28 1987-05-12 House Food Industrial Co., Ltd. Method of producing a dehydrated food product
US4896434A (en) * 1988-11-10 1990-01-30 Joseph Fanelli Apparatus and method for drying gel
EP0406728A2 (fr) * 1989-07-07 1991-01-09 Bosch-Siemens HausgerÀ¤te GmbH Four à micro-ondes avec une fenêtre transparente thermoréfléchissante
DE4040343A1 (de) * 1990-12-17 1992-06-25 Bosch Siemens Hausgeraete Verriegelungsvorrichtung fuer die tuer eines backofens

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276138A (en) * 1962-09-21 1966-10-04 Miwag Mikrowellen Ag Microwave drying apparatus
FR1499628A (fr) * 1965-10-25 1967-10-27 Patelhold Patentverwertung Tunnel pour le traitement par micro-ondes
US3854219A (en) * 1973-06-18 1974-12-17 Gen Electric Electronic dryer
US4250628A (en) * 1979-06-21 1981-02-17 Smith Richard D Microwave fabric dryer method and apparatus
US4622446A (en) * 1982-12-09 1986-11-11 House Food Industrial Company Ltd. Microwave drying apparatus and use thereof
US4664924A (en) * 1982-12-28 1987-05-12 House Food Industrial Co., Ltd. Method of producing a dehydrated food product
US4896434A (en) * 1988-11-10 1990-01-30 Joseph Fanelli Apparatus and method for drying gel
EP0406728A2 (fr) * 1989-07-07 1991-01-09 Bosch-Siemens HausgerÀ¤te GmbH Four à micro-ondes avec une fenêtre transparente thermoréfléchissante
DE4040343A1 (de) * 1990-12-17 1992-06-25 Bosch Siemens Hausgeraete Verriegelungsvorrichtung fuer die tuer eines backofens

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375811A (en) * 2001-05-24 2002-11-27 John Richard Haig A dryer for textiles, utilising low pressure and microwave heating
US8216623B2 (en) 2009-04-07 2012-07-10 Frito-Lay North America, Inc. Flavor infused nut snack
US9746241B2 (en) 2012-02-01 2017-08-29 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US9816757B1 (en) 2012-02-01 2017-11-14 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US9970708B2 (en) 2012-02-01 2018-05-15 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10240867B2 (en) 2012-02-01 2019-03-26 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10690413B2 (en) 2012-02-01 2020-06-23 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10876792B2 (en) 2012-02-01 2020-12-29 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US10928135B2 (en) 2012-02-01 2021-02-23 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US11713924B2 (en) 2012-02-01 2023-08-01 Revive Electronics, LLC Methods and apparatuses for drying electronic devices
US8689461B1 (en) 2012-11-08 2014-04-08 TekDry, LLC Dryer for portable electronics
US11035612B1 (en) * 2013-03-14 2021-06-15 International Research Institute Inc. Microwave and vacuum drying device, system, and related methods

Also Published As

Publication number Publication date
DE4328086A1 (de) 1995-02-23

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