EP0853866B1 - Protection contre les micro-ondes - Google Patents
Protection contre les micro-ondes Download PDFInfo
- Publication number
- EP0853866B1 EP0853866B1 EP96931354A EP96931354A EP0853866B1 EP 0853866 B1 EP0853866 B1 EP 0853866B1 EP 96931354 A EP96931354 A EP 96931354A EP 96931354 A EP96931354 A EP 96931354A EP 0853866 B1 EP0853866 B1 EP 0853866B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microwave
- inwards
- microwave appliance
- fold
- metal casing
- 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.)
- Expired - Lifetime
Links
Images
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
- Microwave technologies bring great advantages for heating of different kinds. For that reason it is used to an increasing extent. Microwaves are considered to cause danger for damages to many organisms including humans and other warm-blooded animals. A fundamental condition at all uses of microwave technology is a reliable shielding against leakage of microwaves.
- shielding is not a large problem. Metals are good reflectors for microwaves and do not release radiation. Even where a certain degree of ventilation is required shielding can with relative ease be arranged by perforated plates or nets of a suitable metal. The apertures in the plate or net must be dimensioned not to let radiation through.
- microwaves are used for high-speed drying of paint applied at road surfaces.
- the shielding problem is solved by using an undefined microwave absorbing material. This implies a comparatively large distance between the microwave generator and the shielding material. Otherwise, the material would be subjected to unacceptable heating.
- microwaves are used for the drying of material, 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 flaps, opening in the movement direction, are used.
- the arrangement is requiring much space in the longitudinal direction, partly since the flaps need space for the movement, partly since the shielding, to be sufficiently effective, must be completed with comparatively long distances between the microwave source and the opening.
- the method is useful in an equipment with stationary microwave sources and mobile drying material.
- UK patents no 630,738 and 1,034,448 also concern drying of material placed on a transport belt here made of a dielectric material.
- a box is proposed. This box is closed at the borders of the belt and has slits in opposite walls for the in and out passage of belt and material.
- a design is used, which lets the upper and lower part of the enclosure separate for the in and out passage of drying material and close together during the heating and drying phase, i.e. when the microwave apparatus is active.
- the cause of the effect is not completely clarified, but one may assume that it relates to the geometry of the radiation.
- Common microwave generators deliver electromagnetic radiation in the range around 12 cm. The wave motion propagates itself linearly.
- Microwave 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 uniformly in all directions except upwards.
- the plate material reflects the radiation. The consequence is that one gets a system of standing waves in the enclosed chamber.
- border width is as large as or larger than the gap width.
- the border width For wheel provided microwave dryers, such as described in SE9400715-0, standing on rails consisting of plastic pipes of the type use for electric installations this means a border width of 10 to 35 mm.
- Fig. 1 shows a sketch of one side of a microwave device, which has been provided with an aluminium brim at the bottom border.
- Fig. 2 shows a corresponding sketch of a microwave appliance with a fold pointing inwards with respect to the casing at the lower part of the casing plate.
- Fig. 3 shows one side of a microwave appliance where the inner shielding net has been drawn down along the equipment casing and folded to get border widening.
- (1) stands for the outer wall of the equipment casing, (1') for a fold pointing inwards with respect to casing, (2) for a border widening rim, applied to the equipment casing, (3) for a metal net impervious to microwaves and (3') for a drawn in border of this net, and (6) for the surface that the microwave appliance is working on.
- the widening can be done by giving the bottom border a rim of a suitable metal for instance aluminium, which is a very good microwave reflector.
- the plate casing may be folded at the lower border to get the 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)
Claims (2)
- Procédé de réduction des fuites de micro-ondes à partir d'un appareil à micro-ondes mobile ouvert à la partie inférieure, l'appareil à micro-ondes étant utilisé pour le séchage ou le traitement thermique de sols, de murs et de plafonds et étant destiné à être déplacé automatiquement sur une surface fixe, l'appareil à micro-ondes étant particulièrement utilisé pour des dispositifs prévus pour le séchage ou le traitement thermique de surfaces limitées par des murs ou des limites, où un traitement thermique de séchage respectivement doit être fait à proximité des murs ou des limites, le procédé étant caractérisé par l'utilisation d'un bord élargi (2) à la partie inférieure dirigée vers la surface fixe (6), pour augmenter la distance qu'un rayonnement de fuite doit parcourir lorsqu'il passe à travers un petit espace existant entre le bord élargi et la surface fixe située dessous, le bord élargi s'étendant vers l'intérieur en direction de l'intérieur du boítier de micro-ondes de l'appareil à micro-ondes, le bord élargi comportant:a) un rebord métallique appliqué à l'intérieur de plaques de boítier métalliques (1) de l'appareil à micro-ondes, oub) un pli (1') dirigé vers l'intérieur, le pli étant plié dans la partie inférieure des plaques de boítier métalliques, ouc) un pli dirigé vers l'intérieur (3') qui est agencé dans un filet formant écran intérieur (3), le filet étant positionné dans le boítier métallique, le filet s'étendant vers le bas en direction de la partie inférieure ouverte du boítier métallique, et le filet formant écran est plié vers l'intérieur afin d'obtenir le pli dirigé vers l'intérieur (3') dans le filet formant écran.
- Appareil à micro-ondes mobile ayant des fuites de micro-ondes réduites, l'appareil à micro-ondes étant utilisé pour le séchage ou le traitement thermique de sols, de murs, de plafonds, etc. et déplacé automatiquement sur une surface fixe (6), où un traitement respectivement de séchage doit être fait à proximité des limites de la surface fixe, l'appareil à micro-ondes étant caractérisé par un bord élargi à sa partie inférieure dirigée vers la surface fixe, le bord élargi s'étendant vers l'intérieur en direction de l'intérieur du boítier à micro-ondes de l'appareil à micro-ondes, le bord élargi étant fourni sous la forme:a) d'un rebord métallique appliqué à l'intérieur des plaques de boítier métalliques (1) de l'appareil à micro-ondes, oub) d'un pli (1'), dirigé vers l'intérieur, dans les plaques métalliques, ouc) un pli dirigé vers l'intérieur (3') d'un filet formant écran (3) situé dans le boítier métallique, le filet s'étendant vers le bas en direction de la partie inférieure ouverte du boítier métallique.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9503308 | 1995-09-22 | ||
SE9503308A SE505240C2 (sv) | 1995-09-22 | 1995-09-22 | Skydd mot mikrovågor |
PCT/SE1996/001170 WO1997011579A1 (fr) | 1995-09-22 | 1996-09-20 | Protection contre les micro-ondes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0853866A1 EP0853866A1 (fr) | 1998-07-22 |
EP0853866B1 true EP0853866B1 (fr) | 2002-07-03 |
Family
ID=20399581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96931354A Expired - Lifetime EP0853866B1 (fr) | 1995-09-22 | 1996-09-20 | Protection contre les micro-ondes |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0853866B1 (fr) |
AT (1) | ATE220286T1 (fr) |
AU (1) | AU7005796A (fr) |
DE (1) | DE69622179T2 (fr) |
SE (1) | SE505240C2 (fr) |
WO (1) | WO1997011579A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE517262C2 (sv) | 1998-04-29 | 2002-05-14 | Leif Goesta Zettergren | Förfarande för skydd mot mikrovågsstrålning vid torkning av våtskadade utrymmen |
AT504855B8 (de) * | 2007-01-29 | 2009-01-15 | Sauli Gerhard | Anlage zur herstellung eines holzprofils und damit hergestelltes holzprofil |
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/xx unknown
-
1996
- 1996-09-20 AT AT96931354T patent/ATE220286T1/de not_active IP Right Cessation
- 1996-09-20 WO PCT/SE1996/001170 patent/WO1997011579A1/fr active IP Right Grant
- 1996-09-20 AU AU70057/96A patent/AU7005796A/en not_active Abandoned
- 1996-09-20 EP EP96931354A patent/EP0853866B1/fr not_active Expired - Lifetime
- 1996-09-20 DE DE69622179T patent/DE69622179T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69622179T2 (de) | 2003-02-13 |
AU7005796A (en) | 1997-04-09 |
DE69622179D1 (de) | 2002-08-08 |
EP0853866A1 (fr) | 1998-07-22 |
SE505240C2 (sv) | 1997-07-21 |
SE9503308L (sv) | 1997-03-23 |
ATE220286T1 (de) | 2002-07-15 |
SE9503308D0 (sv) | 1995-09-22 |
WO1997011579A1 (fr) | 1997-03-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4570045A (en) | Conveyorized microwave heating chamber with dielectric wall structure | |
CA1102883A (fr) | Traduction non-disponible | |
US4246462A (en) | Microwave tunnel oven for the continuous processing of food products | |
EP2031939B1 (fr) | Dispositif de support à ondes pour porte de four à micro-ondes | |
DE60007354D1 (de) | Gemusterter mikrowellensuszeptor | |
JP2005090942A (ja) | 電子レンジのドアアセンブリ | |
US4700034A (en) | Electromagnetic energy seal of a microwave oven | |
JPH07105269B2 (ja) | 電子オーブン用電磁波エネルギ閉じ込め装置 | |
EP0853866B1 (fr) | Protection contre les micro-ondes | |
US4176267A (en) | Microwave energy trap | |
US4227063A (en) | Microwave apparatus seal | |
KR100494446B1 (ko) | 마이크로파를 이용한 연속 건조장치 | |
JP4069092B2 (ja) | 高電磁シールド不定形耐火物マイクロ波乾燥設備 | |
CN110493908B (zh) | 一种防微波泄漏栅格及微波加热器 | |
US6717120B2 (en) | Shielding system for protecting select portions of a food product during processing in a conveyorized microwave oven | |
KR930022372U (ko) | 전자레인지용 마그네트론의 기본파 및 고조파 노이즈 성분 누설방지장치 | |
GB2187617A (en) | Microwave oven | |
AU735301B2 (en) | Grill element | |
WO2022004107A1 (fr) | Séchoir | |
WO2023074551A1 (fr) | Dispositif de chauffage par micro-ondes | |
CN108886845A (zh) | 高频加热装置 | |
EP3911121A1 (fr) | Four à multiples bobines d'arrêt | |
KR200169623Y1 (ko) | 전자렌지의 하 히터 설치구조 | |
SU1104694A2 (ru) | Устройство дл СВЧ-обработки пищевых продуктов | |
JPH02279923A (ja) | ヒータ付高周波加熱調理装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19980421 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB IT LI NL SE |
|
17Q | First examination report despatched |
Effective date: 20000313 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB IT LI NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020703 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 20020703 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020703 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020703 |
|
REF | Corresponds to: |
Ref document number: 220286 Country of ref document: AT Date of ref document: 20020715 Kind code of ref document: T |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 69622179 Country of ref document: DE Date of ref document: 20020808 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: E. BLUM & CO. PATENTANWAELTE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20021003 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20021003 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030130 |
|
EN | Fr: translation not filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20030404 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PUE Owner name: SPEIDEL SYSTEM TROCKNUNG GMBH Free format text: ZETTERGREN, LEIF GOESTA#APPELSINVAEGEN 36#175 49 JAERFAELLA (SE) -TRANSFER TO- SPEIDEL SYSTEM TROCKNUNG GMBH#RELLINGER STRASSE 23#20257 HAMBURG (DE) |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070913 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PFA Owner name: SPEIDEL SYSTEM TROCKNUNG GMBH Free format text: SPEIDEL SYSTEM TROCKNUNG GMBH#RELLINGER STRASSE 23#20257 HAMBURG (DE) -TRANSFER TO- SPEIDEL SYSTEM TROCKNUNG GMBH#RELLINGER STRASSE 23#20257 HAMBURG (DE) |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20070913 Year of fee payment: 12 Ref country code: AT Payment date: 20070912 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20070919 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20080920 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090401 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080920 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080930 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080920 |