• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A process and an apparatus for freeze-drying by means of microwaves, in which the product to be dried is placed on a support composed of a material which is transparent to microwave energy, covered with a layer of material which conducts electricity.
    公开号:SU1001870A3
    申请号:SU782603001
    申请日:1978-04-10
    公开日:1983-02-28
    发明作者:Ле Вье Тоэ
    申请人:Сосьете Де Продюи Нестле С.А. (Фирма)；
    IPC主号:
    专利说明:

    (54) VACUUM DRYER
    one
    The invention relates to a drying technique and can be used in the food industry.
    A device for drying g of finely dispersed dielectric materials is known, comprising a microwave resonator, an excitation system, conveyor belts for loading and unloading material and a working conveyor belt CiX S
    The disadvantage of this device is low efficiency of the drying process.
    Closest to the present invention is a vacuum dryer, which contains a belt conveyor made of a dielectric material placed in a chamber and microwave waveguides with radiators mounted above it.
    However, the known dryer is characterized by an unsatisfactory intensity of the drying process.
    The purpose of the invention is to intensify the drying process.
    This goal is achieved in that 25 the conveyor belt is covered with a layer of insulating material containing carbon fiber.
    The drawing schematically shows a vacuum dryer. .thirty
    The proposed vacuum dryer contains a chamber 1 for a cryo dryer, nozzles for inlet 2 and outlet 3 of the material, equipped with gateways, a conveyor belt 4 for moving the material to be dried, a microwave applicator consisting of box 5 and a waveguide b, which is a series of straight lines, connect “Semicircle-shaped segments with power supply, fed from a source of ultrahigh frequencies (wavelength in the waveguide of 17.34 cm, power of 5000 W), as well as radiators 7.
    On the upper wall of the box 5 opposite the radiators 7 there are windows (not shown), covered with a material that is permeable to microwave waves and not gas-permeable, such as Teflon. Box 5 is under vacuum, as is chamber 1, and waveguide 6 and radiators 7 are at atmospheric pressure to avoid ionization.
    The distance from the window to the material being dried is about 40 cm.
    权利要求:
    Claims (2)
    [1]
    The conveyor belt 4 consists of glass fiber reinforced Teflon and is covered with a layer of insulating material containing carbon fiber. Silicone or rubber can be used as an insulating material. A layer of insulating material is obtained by dipping the conveyor belt into a suspension of carbon fibers in liquid silicone. Rubber can be used K to produce a conveyor belt as well as an insulating material. Glass fibers can be added to carbon fibers to increase the mechanical resistance (carbon is known to absorb microwave energy and partially conduct electricity). The vacuum dryer works as follows. The dried material, such as an extract of frozen coffee, is fed from through pipe 2 to the conveyor belt 4 and moves to the outlet pipe 3. The dried material passing through the applicator is irradiated with ultra-high frequency energy emanating from the emitters 7 and passing through the box 5. Energy absorption conveyor belt increases drying speed. Within a few seconds, the ribbon reaches C, the extract of frozen coffee enters the box with a temperature of - 40 ° C, and leaves it with a temperature of + 40 ° C. The material can be dried to 2-3% moisture in about 2 minutes versus 4O minutes when heated by ultrahigh frequencies acting only on the material being dried with ordinary Teflon tape that is permeable to microwave waves, since the duration of drying depends on the duration of heating the tape and the material being dried. . The proposed vacuum dryer allows to intensify the drying process. Claims of the invention A vacuum dryer comprising a belt conveyor of a dielectric material placed in a chamber and microwave waveguides with radiators mounted above it, characterized in that, in order to intensify the drying process, the conveyor belt is covered with a layer of insulating material containing carbon fiber. Sources of information taken into account during the examination 1. USSR author's certificate No. 596794, cl. F 26 B 3/34, 1976.
    [2]
    2. USSR author's certificate number 577372, cl. F 26 B 3/34, 1976.
    / ttttt.,.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1001870A3|1983-02-28|Vacuum drier
    US3277580A|1966-10-11|Method and apparatus for drying
    US2428615A|1947-10-07|Method and apparatus for drying yarn packages in an electrostatic field
    US4045639A|1977-08-30|Continuous microwave and vacuum dryer
    US4746968A|1988-05-24|Combined microwave and thermal drying apparatus
    US4259560A|1981-03-31|Process for drying coal and other conductive materials using microwaves
    US3263052A|1966-07-26|Power distribution system for microwave process chambers
    US4879444A|1989-11-07|Apparatus for the heat treatment of insulating materials using microwave energy and hot gas
    US3775860A|1973-12-04|Method for drying materials with microwave energy
    EP0064516B1|1984-06-13|A method of carrying out the drying of wooden objects
    EP0027471B1|1985-10-09|High-frequency heating device
    GB947280A|1964-01-22|Method and apparatus for drying tobacco or tobacco-containing articles
    US3474209A|1969-10-21|Dielectric heating
    JPH1089846A|1998-04-10|Drying and/or crystalizing device
    US3446929A|1969-05-27|Microwave apparatus
    US4218830A|1980-08-26|Device for drying the sizing of spun glass filaments or the like
    US2414580A|1947-01-21|Heated endless conveyer structure for dehydrating foods
    US4637145A|1987-01-20|Low pressure microwave drying apparatus
    GB963473A|1964-07-08|Improvements in or relating to drying foodstuffs for subsequent rehydration
    US2737569A|1956-03-06|Electrode structure for high frequency drier
    US3478900A|1969-11-18|Apparatus for treating food products and the like with microwave energy
    Resch1967|Drying of incense cedar pencil slats by microwave power
    CA1038458A|1978-09-12|Microwave paint dryer
    SE9800213D0|1998-01-23|Methods and apparatus for drying
    RU2084084C1|1997-07-10|Plant for microwave treatment of insulating materials
    同族专利:
    公开号 | 公开日
    IT7848970D0|1978-04-19|
    US4204336A|1980-05-27|
    DK127478A|1978-10-28|
    FR2389084B1|1984-06-15|
    FI781076A|1978-10-28|
    JPS53135057A|1978-11-25|
    FR2389084A1|1978-11-24|
    SE449523B|1987-05-04|
    SE7804724L|1978-10-28|
    NL7804495A|1978-10-31|
    IL54487D0|1978-07-31|
    NL180701B|1986-11-03|
    ES469150A1|1979-01-01|
    BE866046A|1978-10-17|
    NL180701C|1987-04-01|
    BR7802606A|1978-11-14|
    DE2818646A1|1978-11-02|
    DK154527C|1989-05-22|
    FI64457C|1983-11-10|
    CH612002A5|1979-06-29|
    IT1156704B|1987-02-04|
    LU79518A1|1978-09-29|
    NO146966B|1982-09-27|
    DE2818646C2|1982-04-08|
    GB1597687A|1981-09-09|
    NO781284L|1978-10-30|
    FI64457B|1983-07-29|
    NO146966C|1983-01-05|
    DK154527B|1988-11-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2548209C2|2012-10-22|2015-04-20|Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный университет инженерных технологий" |Vacuum drier of continuous action with uhf power supply|GB1053012A|1900-01-01|
    US2668364A|1950-10-27|1954-02-09|Dry Freeze Corp|Drying of materials by infrared radiation|
    FR1129164A|1955-07-19|1957-01-16|Dutertre & Cie Sa Ets|Drying device|
    US3020645A|1959-01-26|1962-02-13|Raytheon Co|Method and apparatus for control of freeze drying|
    US3276138A|1962-09-21|1966-10-04|Miwag Mikrowellen Ag|Microwave drying apparatus|
    US3266169A|1962-10-31|1966-08-16|Hupp Corp|Vacuum freeze drying apparatus|
    US3266168A|1964-08-31|1966-08-16|Gen Motors Corp|Domestic dryer apparatus|
    FR1488292A|1966-04-08|1967-07-13|Cryodry Corp|Energy distribution device for microwave treatment chambers|
    GB1233505A|1968-07-23|1971-05-26|
    CH567236A5|1973-01-16|1975-09-30|Bereb S A R L Bureau D Etudes|
    JPS5315208B2|1973-08-14|1978-05-23|
    JPS513419A|1974-06-29|1976-01-12|Kenzo Nakamura| Atsuryokuhaikanrohasonjijidoheishiben |
    JPS555628B2|1975-08-07|1980-02-08|DE3221060A1|1982-06-04|1983-12-08|Rahdener Maschinenfabrik August Kolbus Gmbh & Co Kg, 4993 Rahden|DEVICE FOR DRYING AND SETTING UP THE BOOK BLOCK BACK OR THE LIKE APPLIED GLUE USING A HIGH FREQUENCY VOLTAGE FIELD|
    JPS6231835Y2|1982-11-24|1987-08-14|
    US4518651A|1983-02-16|1985-05-21|E. I. Du Pont De Nemours And Company|Microwave absorber|
    US4878765A|1985-06-03|1989-11-07|Golden Valley Microwave Foods, Inc.|Flexible packaging sheets and packages formed therefrom|
    US4865921A|1987-03-10|1989-09-12|James Riker Corporation Of Virginia|Microwave interactive laminate|
    US5230160A|1992-08-24|1993-07-27|The J. M. Smucker Company|Reduction of aflatoxin content in peanuts|
    US6225611B1|1999-11-15|2001-05-01|Hull Corporation|Microwave lyophilizer having corona discharge control|
    BRPI0510529A|2004-05-01|2007-10-30|Agres Ltd|drying process and apparatus|
    US8722749B2|2004-07-30|2014-05-13|Enwave Corporation|Method for producing hydrocolloid foams|
    JP5329391B2|2006-03-31|2013-10-30|コールテクインコーポレイテッド|Method and system for improving solid fuel properties|
    CN102226635B|2011-06-09|2013-02-27|四川宏普微波科技有限公司|Microwave continuous freeze-drying device|
    JP5814094B2|2011-11-30|2015-11-17|ふたみ青果株式会社|Freeze-drying method and apparatus using far-infrared heater|
    CN105066641A|2015-07-31|2015-11-18|江苏楷益智能科技有限公司|Vacuum microwave drying device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH520677A|CH612002A5|1977-04-27|1977-04-27|
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