EP0853866A1 - Microwave shielding - Google Patents
Microwave shieldingInfo
- Publication number
- EP0853866A1 EP0853866A1 EP96931354A EP96931354A EP0853866A1 EP 0853866 A1 EP0853866 A1 EP 0853866A1 EP 96931354 A EP96931354 A EP 96931354A EP 96931354 A EP96931354 A EP 96931354A EP 0853866 A1 EP0853866 A1 EP 0853866A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drawn
- equipment casing
- drying
- bending
- microwave
- 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
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)
- Glass Compositions (AREA)
- Surgical Instruments (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9503308 | 1995-09-22 | ||
SE9503308A SE505240C2 (en) | 1995-09-22 | 1995-09-22 | Microwave protection |
PCT/SE1996/001170 WO1997011579A1 (en) | 1995-09-22 | 1996-09-20 | Microwave shielding |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0853866A1 true EP0853866A1 (en) | 1998-07-22 |
EP0853866B1 EP0853866B1 (en) | 2002-07-03 |
Family
ID=20399581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96931354A Expired - Lifetime EP0853866B1 (en) | 1995-09-22 | 1996-09-20 | Microwave shielding |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0853866B1 (en) |
AT (1) | ATE220286T1 (en) |
AU (1) | AU7005796A (en) |
DE (1) | DE69622179T2 (en) |
SE (1) | SE505240C2 (en) |
WO (1) | WO1997011579A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE517262C2 (en) | 1998-04-29 | 2002-05-14 | Leif Goesta Zettergren | Method for protection against microwave radiation when drying wet areas |
AT504855B8 (en) * | 2007-01-29 | 2009-01-15 | Sauli Gerhard | APPENDIX FOR PRODUCING A WOOD PROFILE AND THEREFORE MANUFACTURED WOOD PROFILE |
Family Cites Families (3)
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 |
-
1995
- 1995-09-22 SE SE9503308A patent/SE505240C2/en unknown
-
1996
- 1996-09-20 EP EP96931354A patent/EP0853866B1/en not_active Expired - Lifetime
- 1996-09-20 DE DE69622179T patent/DE69622179T2/en not_active Expired - Fee Related
- 1996-09-20 AU AU70057/96A patent/AU7005796A/en not_active Abandoned
- 1996-09-20 WO PCT/SE1996/001170 patent/WO1997011579A1/en active IP Right Grant
- 1996-09-20 AT AT96931354T patent/ATE220286T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9711579A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE69622179T2 (en) | 2003-02-13 |
AU7005796A (en) | 1997-04-09 |
DE69622179D1 (en) | 2002-08-08 |
EP0853866B1 (en) | 2002-07-03 |
ATE220286T1 (en) | 2002-07-15 |
SE505240C2 (en) | 1997-07-21 |
SE9503308D0 (en) | 1995-09-22 |
WO1997011579A1 (en) | 1997-03-27 |
SE9503308L (en) | 1997-03-23 |
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