WO2002028145A1 - Mikrowellengerät - Google Patents
Mikrowellengerät Download PDFInfo
- Publication number
- WO2002028145A1 WO2002028145A1 PCT/EP2001/010959 EP0110959W WO0228145A1 WO 2002028145 A1 WO2002028145 A1 WO 2002028145A1 EP 0110959 W EP0110959 W EP 0110959W WO 0228145 A1 WO0228145 A1 WO 0228145A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microwave
- source
- microwave device
- radiation
- cooking space
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims abstract description 33
- 238000010411 cooking Methods 0.000 claims abstract description 30
- 238000012216 screening Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 description 11
- 150000002367 halogens Chemical class 0.000 description 11
- 239000011521 glass Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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
- H05B6/76—Prevention of microwave leakage, e.g. door sealings
- H05B6/766—Microwave radiation screens for windows
-
- 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
- H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
-
- 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
- H05B6/647—Aspects related to microwave heating combined with other heating techniques
- H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
Definitions
- the invention is based on a microwave device according to the preamble of claim 1.
- a generic microwave device is known from EP 1005 255 A1.
- the microwave oven has a cooking space arranged in a housing, a microwave source and a halogen lamp.
- the halogen lamp can be used as a heating element.
- a perforated grid made of an electrically conductive material is arranged in front of the halogen lamp.
- the perforated grid is formed by a sheet metal plate into which recesses are made.
- the object of the invention is to further develop a generic microwave device, in particular with regard to its efficiency.
- the object is achieved by the features of patent claim 1, while advantageous refinements and developments of the invention can be found in the subclaims. *: ' * '
- the invention is based on a microwave device with a cooking space arranged in a housing, with at least one microwave source and with at least one further radiation source that is alternative to the microwave source and is protected from microwaves of the microwave source by means of a screening grid.
- the latching walls of the shielding grid each have a radiation reflector, via which rays from the alternative radiation source can be reflected into the cooking space.
- a radiation reflector via which rays from the alternative radiation source can be reflected into the cooking space.
- light sources with a glow element require shielding, specifically in order to protect the glow element from damage and to at least largely avoid leakage of microwaves via the glow element and via supply lines of the glow element.
- uniform illumination of the cooking space can be achieved with the screening grid according to the invention.
- the light source can emit purely visible light for illuminating the cooking space or can advantageously also be designed to be usable as a heating element, for example by emitting light in the infrared range, as is the case in particular with halogen lamps.
- the screening grid according to the invention an advantageous heating efficiency of the light source can be achieved.
- the reflector can be formed by a flat surface that is perpendicular to a support surface in the cooking space.
- one or more reflectors can advantageously be inclined to the cooking space and / or curved, so that advantageous reflection of the rays into the cooking space is ensured.
- At least one and advantageously all the latching walls are formed by a thin-walled, polished metal, as a result of which an inexpensive shielding grid with preferably small wall thicknesses can be achieved.
- a highly reflective material such as, for example, aluminum, silver, etc., as a result of which particularly high reflection rates and low absorption values can be achieved.
- the shielding grid can have snap-in recesses with different types of base areas that appear useful to the person skilled in the art, for example with round, oval or square base areas.
- the screening grid has locking recesses with rectangular bases, which makes the screening grid simple and can be designed and manufactured cost-effectively, for example by means of assembled, flat metal sheets, etc.
- the shielding grid In order to achieve the most advantageous shielding or attenuation of the microwaves, the shielding grid must be dimensioned in such a way that a propagation of the microwaves over the shielding grid is at least largely avoided. This is advantageously achieved in the case of rectangular snap-in recesses by designing them with a length of less than half a microwave length. Furthermore, the width of the locking recess is advantageously equal to half the length of the locking recess. Locking recesses with round, oval, triangular or pentagonal base areas etc. are to be designed accordingly in accordance with generally known laws, so that a spread of the microwaves through the shielding grid is at least largely avoided.
- the height should advantageously be selected in such a way that at least an attenuation of 40 dB is achieved, the logarithmic ratio of 40 dB being based on the microwave power in front of the shielding grid and one present microwave power according to the screening grid, on the side facing the radiation source.
- the screening grid is advantageously between 5 mm and 50 mm high.
- Fig. 1 shows a microwave device without a housing obliquely from above
- Fig. 2 shows a detail II of Fig. 1 enlarged
- Fig. 3 shows a partial section along the line III-III in Fig. 1 and Fig. 4 attenuation of microwaves, depending on the height and the recess length of various screening grids according to the invention.
- the microwave device has a microwave source 12 formed by a magnetron or a time-of-flight tube, from which microwaves can be conducted into the cooking chamber 11 via a waveguide 22 for heating a food to be cooked.
- the microwave device has two radiation sources 13, 14 formed by halogen lamps.
- the first radiation source 13 is arranged above the glass pane 20 forming the ceiling of the cooking space 11 and the second radiation source 14 is arranged below and extends below the glass plate 21 forming the bottom of the cooking space 11 across the entire width of the cooking space 11.
- the halogen lamps forming the radiation sources 13, 14 each have an incandescent filament by means of which invisible light in the infrared range for heating a food item and visible light for illuminating the cooking space 11 can be generated.
- the halogen lamps on the side facing away from the cooking chamber 11 are surrounded by bowl-shaped reflectors 23, 24. During the operation of the microwave device with the halogen lamps, these are moved in opposite directions above and below the cooking chamber 11 to the front and to the rear via a drive unit (not shown).
- the radiation sources 13, 14 are protected from the microwaves of the microwave source 12 via screening grids 15, 16.
- the first shielding grid 15 is arranged above the glass pane 20 forming the ceiling of the cooking space 11, between the glass pane 20 and the first, upper radiation source 13 and extends over the entire cooking space 11.
- the second shielding grid 16 is below that forming the bottom of the cooking space 11 Glass pane 21, arranged between the glass pane 21 and the second, lower radiation source 14 and also extends over the entire cooking space 11.
- the latching walls 17 are formed from thin-walled, polished, flat aluminum sheets aligned perpendicular to the floor or ceiling of the cooking chamber 11, so that the latching walls 17 form radiation reflectors 18, via which rays from the radiation sources 13, 14 can be reflected into the cooking chamber 11.
- the aluminum sheets are put together and have a thickness of 0.2 mm.
- other strengths that appear to be useful to the person skilled in the art are also conceivable, such as, for example, between 0.1 mm and 5 mm, the thinner the walls, the less rays from the radiation sources are reflected on the end faces of the walls in undesired directions.
- the shielding rasters 15, 16 have locking recesses 19 with rectangular bases, which have a length I of less than half a microwave length. With an existing microwave frequency of 2.45 GHz, the length I should therefore be less than 61.25 mm.
- the length I of the base area is 20 mm and the width b of the base area is equal to half the length I and thus 10 mm (FIGS. 1 and 2).
- the screening grids 15, 16 are designed with a height h of 40 mm.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Electric Ovens (AREA)
- Electric Stoves And Ranges (AREA)
- Seal Device For Vehicle (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01974280A EP1325668B1 (de) | 2000-09-28 | 2001-09-21 | Mikrowellengerät |
DE50111909T DE50111909D1 (de) | 2000-09-28 | 2001-09-21 | Mikrowellengerät |
AU2001293832A AU2001293832A1 (en) | 2000-09-28 | 2001-09-21 | Microwave device |
US10/402,815 US6900422B2 (en) | 2000-09-28 | 2003-03-28 | Microwave device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10048158.2 | 2000-09-28 | ||
DE10048158A DE10048158A1 (de) | 2000-09-28 | 2000-09-28 | Mikrowellengerät |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/402,815 Continuation US6900422B2 (en) | 2000-09-28 | 2003-03-28 | Microwave device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002028145A1 true WO2002028145A1 (de) | 2002-04-04 |
Family
ID=7658014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/010959 WO2002028145A1 (de) | 2000-09-28 | 2001-09-21 | Mikrowellengerät |
Country Status (6)
Country | Link |
---|---|
US (1) | US6900422B2 (de) |
EP (1) | EP1325668B1 (de) |
AT (1) | ATE352181T1 (de) |
AU (1) | AU2001293832A1 (de) |
DE (2) | DE10048158A1 (de) |
WO (1) | WO2002028145A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2864364A4 (de) * | 2012-06-22 | 2016-03-09 | Suganit Systems Inc | Verfahren und vorrichtung zur behandlung von biomassesubstraten |
EP2950616B1 (de) | 2014-05-26 | 2018-11-07 | Electrolux Appliances Aktiebolag | Mikrowellenofen mit einem einen Reflektor enthaltenden Hohlleiter |
US20170074766A1 (en) * | 2015-09-11 | 2017-03-16 | Cem Corporation | Moisture and volatiles analyzer |
EP3513623B1 (de) | 2016-09-15 | 2021-05-19 | Whirlpool Corporation | Mikrowellenofen-grillvorrichtung mit bildschirm |
WO2023172503A1 (en) * | 2022-03-08 | 2023-09-14 | Revolution Cooking, Llc | Microwave oven with radiant energy heating element |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322946A1 (de) * | 1993-07-09 | 1995-01-12 | Miele & Cie | Mikrowellengerät mit Strahlungsheizkörper außerhalb des Garraumes |
WO1998034436A1 (en) * | 1997-01-30 | 1998-08-06 | Whirlpool Corporation | Grill element |
EP1005255A1 (de) * | 1998-11-23 | 2000-05-31 | Lg Electronics Inc. | Heizdeckel für Mikrowellenöfen die benützen Lichtwellenheizer |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3878350A (en) * | 1971-07-15 | 1975-04-15 | Sharp Kk | Microwave cooking apparatus |
US4896656A (en) * | 1984-08-31 | 1990-01-30 | Radiant Optics, Inc. | Lens-like radiant energy transmission control means |
DE3612681A1 (de) * | 1985-12-23 | 1987-07-02 | Gartner & Co J | Verglasung |
DE3907248C2 (de) * | 1989-03-07 | 2002-09-12 | Kirchhoff Gmbh F | Muldentrockner für Schüttgut, insbesondere Asphaltgranulat |
DE3931859A1 (de) * | 1989-09-23 | 1991-04-04 | Bauknecht Hausgeraete | Elektroherd |
DE4012333C1 (en) * | 1990-04-18 | 1991-06-20 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | Solar collector heat barrier - has honeycombed walls with areas having mirror surface finish |
DE4035177C2 (de) * | 1990-11-06 | 1996-04-11 | Helmut W Diedrichs | Abschirmung von abgasführenden Teilen an einem Kraftfahrzeug |
KR100329543B1 (ko) | 1998-07-29 | 2002-08-21 | 엘지전자주식회사 | 전자레인지의할로겐램프냉각구조 |
-
2000
- 2000-09-28 DE DE10048158A patent/DE10048158A1/de not_active Withdrawn
-
2001
- 2001-09-21 AT AT01974280T patent/ATE352181T1/de not_active IP Right Cessation
- 2001-09-21 AU AU2001293832A patent/AU2001293832A1/en not_active Abandoned
- 2001-09-21 WO PCT/EP2001/010959 patent/WO2002028145A1/de active IP Right Grant
- 2001-09-21 EP EP01974280A patent/EP1325668B1/de not_active Expired - Lifetime
- 2001-09-21 DE DE50111909T patent/DE50111909D1/de not_active Expired - Lifetime
-
2003
- 2003-03-28 US US10/402,815 patent/US6900422B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322946A1 (de) * | 1993-07-09 | 1995-01-12 | Miele & Cie | Mikrowellengerät mit Strahlungsheizkörper außerhalb des Garraumes |
WO1998034436A1 (en) * | 1997-01-30 | 1998-08-06 | Whirlpool Corporation | Grill element |
EP1005255A1 (de) * | 1998-11-23 | 2000-05-31 | Lg Electronics Inc. | Heizdeckel für Mikrowellenöfen die benützen Lichtwellenheizer |
Also Published As
Publication number | Publication date |
---|---|
US20040020920A1 (en) | 2004-02-05 |
DE10048158A1 (de) | 2002-04-11 |
ATE352181T1 (de) | 2007-02-15 |
EP1325668A1 (de) | 2003-07-09 |
EP1325668B1 (de) | 2007-01-17 |
AU2001293832A1 (en) | 2002-04-08 |
DE50111909D1 (de) | 2007-03-08 |
US6900422B2 (en) | 2005-05-31 |
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