WO1997011579A1 - Mikrov angstrom gskydd - Google Patents

Mikrov angstrom gskydd Download PDF

Info

Publication number
WO1997011579A1
WO1997011579A1 PCT/SE1996/001170 SE9601170W WO9711579A1 WO 1997011579 A1 WO1997011579 A1 WO 1997011579A1 SE 9601170 W SE9601170 W SE 9601170W WO 9711579 A1 WO9711579 A1 WO 9711579A1
Authority
WO
WIPO (PCT)
Prior art keywords
drawn
equipment casing
drying
bending
microwave
Prior art date
Application number
PCT/SE1996/001170
Other languages
English (en)
French (fr)
Inventor
Leif Gösta ZETTERGREN
Original Assignee
Zettergren Lief Goesta
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 Zettergren Lief Goesta filed Critical Zettergren Lief Goesta
Priority to EP96931354A priority Critical patent/EP0853866B1/en
Priority to AU70057/96A priority patent/AU7005796A/en
Priority to AT96931354T priority patent/ATE220286T1/de
Priority to DE69622179T priority patent/DE69622179T2/de
Publication of WO1997011579A1 publication Critical patent/WO1997011579A1/sv

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
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • 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
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • 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
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04—Heating using microwaves
    • H05B2206/046—Microwave drying of wood, ink, food, ceramic, sintering of ceramic, clothes, hair

Definitions

  • microwaves are used for the drying of mate ⁇ al. for instance wood pieces, placed on a transport chain
  • the drying equipment is designed as a closed box with openings at each end for in and out passage of chain and material
  • shielding at the openings sloping tlaps, opening in the movement direction are used
  • the In the figures 1 stands for the outer wall ofthe equipment casing, 2 for an. at the equipment casing applied, edge widening border, 3 for a metal net impervious to microwaves and 3 * for a drawn in border of this net 4 stands for a drawn-in mantle, 5 for an outer st ⁇ p of a suitable metal and 6 for the surface that the microwave appliance is working on
  • the widening can be done by giving the bottom edge a border of a suitable metal for instance aluminium, which is a very good microwave reflector.
  • a suitable metal for instance aluminium, which is a very good microwave reflector.
  • the plate casing may be bent at the lower edge to get the widening.
  • appliances often consist of parallelepipedic plate boxes with one or more magnetrons placed at the top of the box
  • the radiation source may be considered point-shaped and spreading radiation uniformlv in all directions except upwards
  • the plate mate ⁇ al reflects the radiation The consequence is that one gets a system of standing waves in the enclosed chamber
  • edge width is as large as or larger than the gap width
  • edge width For wheel provided microwave dryers, such as described in SE9400715-0, standing on rails consisting of plastic pipes of the type use for elect ⁇ c installations this means an edge width of 10 to 35 mm
  • edge width At designs with inwards respectively outwards drawn out mantles the width may have to be increased still more to give room for the wheels
  • Fig 1 shows a sketch of one side of a microwave device, which has been provide with an aluminium edge border at the bottom
  • Fig 2 shows a corresponding sketch of a microwave appliance with a drawn-in mantle at the bottom and an outer metal st ⁇ p
  • Fig 3 shows one side of a microwave appliance where the inner shielding net has been drawn down along the equipment casing and bent to get edge widening

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Drying Of Solid Materials (AREA)
  • Electric Ovens (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Glass Compositions (AREA)
  • Surgical Instruments (AREA)
PCT/SE1996/001170 1995-09-22 1996-09-20 Mikrov angstrom gskydd WO1997011579A1 (sv)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP96931354A EP0853866B1 (en) 1995-09-22 1996-09-20 Microwave shielding
AU70057/96A AU7005796A (en) 1995-09-22 1996-09-20 Microwave shielding
AT96931354T ATE220286T1 (de) 1995-09-22 1996-09-20 Abschirmmittel für mikrowellen
DE69622179T DE69622179T2 (de) 1995-09-22 1996-09-20 Abschirmmittel für mikrowellen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9503308A SE505240C2 (sv) 1995-09-22 1995-09-22 Skydd mot mikrovågor
SE9503308-0 1995-09-22

Publications (1)

Publication Number Publication Date
WO1997011579A1 true WO1997011579A1 (sv) 1997-03-27

Family

ID=20399581

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/001170 WO1997011579A1 (sv) 1995-09-22 1996-09-20 Mikrov angstrom gskydd

Country Status (6)

Country Link
EP (1) EP0853866B1 (sv)
AT (1) ATE220286T1 (sv)
AU (1) AU7005796A (sv)
DE (1) DE69622179T2 (sv)
SE (1) SE505240C2 (sv)
WO (1) WO1997011579A1 (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423954B1 (en) 1998-04-29 2002-07-23 Zettergren Leif Goesta Shielding method during microwave radiation drying
EP1950016A3 (de) * 2007-01-29 2011-11-30 Gerhard Sauli Anlage zur Herstellung eines Holzprofils und damit hergestelltes Holzprofil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB630738A (en) * 1946-06-01 1949-10-20 British Thomson Houston Co Ltd Improvements in and relating to high frequency dielectric heating apparatus
GB1034448A (en) * 1965-01-05 1966-06-29 Tappan Co Improvements in high frequency ovens
US4765773A (en) * 1987-02-27 1988-08-23 Hopkins Harry C Microwave highway paint drying apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB630738A (en) * 1946-06-01 1949-10-20 British Thomson Houston Co Ltd Improvements in and relating to high frequency dielectric heating apparatus
GB1034448A (en) * 1965-01-05 1966-06-29 Tappan Co Improvements in high frequency ovens
US4765773A (en) * 1987-02-27 1988-08-23 Hopkins Harry C Microwave highway paint drying apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423954B1 (en) 1998-04-29 2002-07-23 Zettergren Leif Goesta Shielding method during microwave radiation drying
EP1950016A3 (de) * 2007-01-29 2011-11-30 Gerhard Sauli Anlage zur Herstellung eines Holzprofils und damit hergestelltes Holzprofil

Also Published As

Publication number Publication date
DE69622179T2 (de) 2003-02-13
AU7005796A (en) 1997-04-09
DE69622179D1 (de) 2002-08-08
EP0853866B1 (en) 2002-07-03
ATE220286T1 (de) 2002-07-15
SE505240C2 (sv) 1997-07-21
SE9503308D0 (sv) 1995-09-22
EP0853866A1 (en) 1998-07-22
SE9503308L (sv) 1997-03-23

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