EP3225079A1 - Cooking household appliance - Google Patents
Cooking household applianceInfo
- Publication number
- EP3225079A1 EP3225079A1 EP15791547.1A EP15791547A EP3225079A1 EP 3225079 A1 EP3225079 A1 EP 3225079A1 EP 15791547 A EP15791547 A EP 15791547A EP 3225079 A1 EP3225079 A1 EP 3225079A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- door
- trap
- microwave
- door bottom
- muffle
- 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
- 238000010411 cooking Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005516 deep trap Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000010959 steel 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
- H05B6/763—Microwave radiation seals for doors
Definitions
- the present invention relates to a household cooking appliance.
- Household cooking appliances having a magnetron for generating microwaves have various microwave trap systems known for shielding and reducing the microwave leak rate of the home cooking appliance.
- a microwave leak rate is to be understood as meaning a microwave power output per unit area emerging from the household appliance.
- US 4,794,218 A describes a door for a microwave oven. At the door is provided with this connected microwave trap. The microwave trap has slots.
- an object of the present invention is to provide an improved Mullsgarêt available.
- a Movable to conform its contour to the arched doorway is proposed, which is disposed between a muffle flange of the muffle and a door bottom of the door, wherein the door bottom is curved, wherein the microwave trap is bendable to conform its contour to the arched doorway, and wherein the microwave trap is secured to the arched doorway.
- the door base is curved and the microwave trap is adapted to the curvature of the door base, the fall effect is improved, especially in corner regions of the door.
- the microwave trap and the door bottom are preferably made separately and then joined together. This allows a simple and cost-effective design of the necessary bending and pressing tools, since due to the curvature of the microwave trap otherwise a considerable manufacturing effort would arise.
- the door bottom is preferably square.
- the Martinsgarillon can be for example a microwave oven or a microwave oven.
- the muffle flange is arched corresponding to the door bottom, so that a uniform door gap is provided between the muffle flange and the door bottom.
- the door bottom is spherically curved.
- a first portion or attachment portion of the door base is spherical, in particular hemispherical, curved.
- the door bottom is arched in the shape of a sphere.
- the door bottom is concavely curved with respect to the muffle.
- the curvature of the door base away from the muffle.
- the door bottom and the microwave trap are separate components.
- the microwave trap is bent from a comb-shaped sheet metal component. Characterized in that the door bottom and the microwave trap are formed as separate components, the microwave trap can be aligned exactly with this when connecting to the door bottom.
- the microwave trap is welded to the door bottom, in particular laser welded.
- the microwave trap in a welding tool relative to the
- Door bottom can be positioned, whereby tight tolerance requirements can be met.
- the microwave trap is a quarter-wave trap. According to a further embodiment, the microwave trap is comb-shaped.
- the microwave trap has a mounting portion for fixing the microwave trap to the door bottom and a latch portion, the latch portion being slotted so as to have alternate drop teeth and latch slots.
- a ratio of a fall tooth width of the fall teeth to a fall slot width of the trap slots is two.
- the drop teeth preferably have a width of 3 to 5 millimeters, more preferably 3.5 to 4.5 millimeters, more preferably 4 millimeters.
- the trap slots preferably have a width of 1 to 3 millimeters, more preferably of 1, 5 to 2, 5 millimeters, more preferably of 2 millimeters.
- the repeating period is preferably 6 millimeters wide with a ratio of the snare tooth width to the snail slot width of 2.
- Fig. 1 shows a schematic perspective view of an embodiment of a Marshsgarêts
- FIG. 2 shows a schematic sectional view through a muffle flange of the household cooking appliance according to FIG. 1;
- FIG. FIG. 3 shows a further schematic sectional view through the muffle flange according to FIG. 2;
- FIG. 1 shows a schematic sectional view through a muffle flange of the household cooking appliance according to FIG. 1;
- FIG. 3 shows a further schematic sectional view through the muffle flange according to FIG. 2;
- Fig. 4 shows a schematic perspective view of an embodiment of a micelle cell trap for the Mullsgarêt according to FIG. 1;
- FIG. 5 shows another schematic perspective view of the microwave trap according to Fig. 4; and
- FIG. 6 shows a schematic perspective view of a door bottom of a door for the household cooking appliance according to FIG. 1.
- Fig. 1 shows a schematic perspective view of a Mossgar réelles 1.
- the Swsgar réelle 1 has a magnetron 2 for generating microwaves.
- the Rollsgar réelle 1 may be, for example, a microwave oven or a microwave oven.
- the Mathsgar réelle 1 also has a cooking chamber 3, which is enclosed by a muffle 4 of Mullsgar réelles 1.
- the muffle 4 With the help of a door 5, the muffle 4 can be closed.
- the muffle 4 has in particular a cuboid geometry.
- a muffle flange 6 of the muffle 4 is provided on the front side.
- the door 5 may be pivotally mounted on the muffle flange 6.
- the door 5 can be mounted pivotably on the muffle flange 6 at a lower end.
- the door 5 can also be hinged laterally or fastened to a pull-out baking cart.
- a handle 8 may be arranged.
- the door 5 is shown in a half-open state.
- FIGS. 2 and 3 each show a schematic sectional view through the upper portion 7 of the door 5 with the Muffelflansch 6.
- the door 5 is of a closed state shown in Figs. 2 and 3 in the direction of an arrow 9 in the in Figs 1 shown open state hinged.
- a microwave trap 1 1 is arranged between the muffle flange 6 and a door bottom 10 of the door 5, a microwave trap 1 1 is arranged.
- the door floor 10 may be a steel sheet.
- the microwave trap 1 1 is adapted to prevent the escape of microwaves from the cooking chamber 3.
- the microwave trap 1 1 is in particular a so-called lambda quarter trap.
- the door 5 may comprise the microwave trap 1 1.
- the door 5 further comprises a cover frame 12 for covering the microwave trap 1 1 and a mounted between the cover frame 12 and the door bottom 10 sealing means 13.
- the cover frame 12 is preferably made of a plastic material.
- the sealing device 13 is attached to the cover frame 12.
- the cover frame 12 is a component of the door 5.
- the sealing device 13 has a sealing lip 14, which is adapted to seal the door 5 with respect to the muffle flange 6.
- the sealing lip 14 is preferably elastically deformable.
- the sealing device 13 is made of a temperature-resistant plastic material.
- the door bottom 10 has a mounting portion or first portion 15 to which the microwave trap 1 1 is attached. Furthermore, the door bottom 10 has a second section 16 arranged perpendicular to the first section 15. Between the second portion 16 and the cover 12, the sealing device 13 is arranged.
- the microwave trap 1 1 has a mounting portion 17 which is fixed to the first portion 15 of the door bottom 15. Preferably, the attachment portion 17 is welded to the first portion 15 of the door base 10, in particular laser welded.
- the microwave trap 1 1 further has a trap portion 18.
- the trap portion 18 is configured to reduce a microwave leak rate of the household cooking appliance 1.
- the term "microwave leak rate" is to be understood as meaning a microwave power per unit area emerging from the household cooking appliance 1.
- the trap portion 18 is disposed a distance d from the second portion 16 of the door base 10.
- FIG. 6 shows the first section 15 of the door base 10 in a schematic perspective view.
- the muffle 4 is arranged behind the door bottom 10.
- the door bottom 10 and in particular the first portion 15 of the door base 10 is spherically curved.
- the door bottom 10 is spherical, in particular hemispherical, curved.
- the microwave trap 1 1 is bendable, the contour of which is adaptable to the curved door bottom 10.
- the muffle flange 6 is arched corresponding to the door bottom 10, so that a uniform door gap s (FIG. 2) is provided between the muffle flange 6 and the door bottom 10.
- the door bottom 10 is concave with respect to the muffle 4. That is, the door bottom 10 is curved away from the muffle 4.
- the door bottom 10 and the microwave trap 1 1 are in particular separate components.
- the microwave trap 1 1 and the door base 10 are mechanically and electrically connected.
- the microwave trap 1 1 and the door bottom 10 can be welded.
- the still unconnected components can be positioned exactly to each other in a tool of a welding device, so that in particular the distance d can be maintained with high precision.
- the prevailing inside the muffle 4 microwave radiation strikes with different angles of incidence ⁇ on the microwave trap 1 1. If a microwave is tilted, the effective trap length of a non-slotted microwave trap is increased by a factor of 1 / cos ( ⁇ ).
- the effective trap length also varies the effective frequency so that a non-slotted microwave trap no longer optimally acts at any angle of incidence.
- this effect is particularly pronounced, since different angles of incidence can occur in a very wide range here. If the microwave trap is not subdivided by slots, surface currents can flow unimpeded in the wave propagation direction.
- the trap slots 20 of the previously described microwave trap 1 prevent this and divert the surface currents in the slot direction, so that the associated Microwaves have a much lower angle of incidence ⁇ , which is so small that the incident situation corresponds almost to a incoming microwave in the normal direction.
- the microwave trap 1 1 is bent from a metal comb whose case teeth 19 have, for example, a fall tooth width b19 of four millimeters and a trap slot width b20 of the trap slots 20 of, for example, two millimeters (FIG. 4).
- the repetitive period is then six millimeters wide and has a ratio of the drop tooth width b19 to the trap slot width b20 of two.
- the effective length of the microwave trap 1 1 is only increased by 0.9% at a common operating frequency of the domestic appliance 1 at 2.45 GHz.
- a quarter wavelength is 30.5 millimeters long, while a drop tooth 19 is four millimeters wide.
- an extension of the effective trap length corresponds to a shift in the effective trap frequency from 2.45 GHz to 2.43 GHz.
- the effect of the microwave trap 1 1 is not significantly affected by this small frequency shift.
- Any period widths and ratios of the drop tooth width b19 to the trap slot width b20 are possible. The exact definition depends inter alia on a position of the microwave trap 1 1 and the dimensions of the door base 10.
- the very deep-reaching trap slots 20 in combination with a high number of latch slots 20 per unit length make the microwave trap 1 1 flexible and make it possible to adapt the contour of the microwave trap 1 1 an arbitrarily curved surface of the door base 10.
- the curvature of the microwave trap 1 1 results in a better wave-blocking effects in corner regions of the door 5.
- the door bottom 10, to which the microwave trap 1 1 is welded is concave-shaped, so that the curvature points away from the muffle 4.
- the microwave trap 1 1 can be inserted without mechanical tension in the curved contour of the door base 10 and connected thereto.
- the opposite muffle flange 6 of the household cooking appliance 1 of this contour is also adapted and correspondingly convexly shaped.
- the door bottom and the microwave trap are usually made from a common sheet metal blank.
- the separation of microwave trap 1 1 and door bottom 10 in two separate components, which are manufactured separately and then joined together, has an advantageous effect on a simple design of the necessary bending and pressing tools, because otherwise a considerable effort would arise due to the curvature.
- the component separation is advantageous in the sense that the forms of the door base 10 and the bending of the microwave trap 1 1 is carried out separately and thus the tolerances of the respective processes are separately controlled and influenced.
- a further correction possibility is given by alignment with one another. In this way, for example, the dimension designated by d in FIG. 1 can be maintained with narrow tolerance.
- the profound slitting of the microwave trap 1 1 also leads to a more robust joining process when connecting microwave trap 1 1 and door bottom 10, since the microwave trap 1 1 clings to the first section 15 of the door bottom 10 and curvature fluctuations and discontinuities of the first section 15th can balance well. In this way, the risk of localized gap formation between microwave trap 1 1 and the first portion 15 of the door base 10 is significantly reduced.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014224053.0A DE102014224053A1 (en) | 2014-11-25 | 2014-11-25 | Haushaltsgargerät |
PCT/EP2015/075220 WO2016083070A1 (en) | 2014-11-25 | 2015-10-30 | Cooking household appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3225079A1 true EP3225079A1 (en) | 2017-10-04 |
EP3225079B1 EP3225079B1 (en) | 2023-03-08 |
Family
ID=54478730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15791547.1A Active EP3225079B1 (en) | 2014-11-25 | 2015-10-30 | Cooking household appliance |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170318630A1 (en) |
EP (1) | EP3225079B1 (en) |
DE (1) | DE102014224053A1 (en) |
PL (1) | PL3225079T3 (en) |
WO (1) | WO2016083070A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021210592A1 (en) | 2021-09-23 | 2023-03-23 | BSH Hausgeräte GmbH | Cooking chamber door for a microwave oven and microwave oven |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017210730A1 (en) | 2017-06-26 | 2018-12-27 | BSH Hausgeräte GmbH | Microwave oven with quarter-wave trap |
IT202000017299A1 (en) * | 2020-07-16 | 2022-01-16 | Smeg Spa | FOOD OVEN |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3409563A1 (en) * | 1984-03-15 | 1985-09-19 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Microwave oven |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2224661B2 (en) * | 1972-05-19 | 1974-12-12 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka (Japan) | Microwave oven elimination in: 2264616 and elimination in: 2264617 and elimination in: 2264618 and elimination in: 2264619 |
AU590528B2 (en) | 1984-11-20 | 1989-11-09 | Matsushita Electric Industrial Co., Ltd. | Door assembly for microwave heating apparatus |
IT1225856B (en) * | 1988-12-19 | 1990-12-07 | Zanussi A Spa Industrie | MICROWAVE OVEN EQUIPPED WITH A MICROWAVE SHIELDING DEVICE |
SE519514C2 (en) * | 1998-12-17 | 2003-03-11 | Whirlpool Co | Microwave with microwave seal and sealing procedure |
EP1401244B1 (en) * | 2002-09-23 | 2011-02-16 | LG Electronics, Inc. | Constructional features in a microwave oven |
DE102004003406A1 (en) * | 2004-01-23 | 2005-08-18 | Electrolux Schwanden Ag | A method for constructing a door for microwave ovens has an inner frame forming a quarter wavelength pocket around the opening and a smaller gap to the housing |
US9179506B2 (en) * | 2010-05-26 | 2015-11-03 | Lg Electronics Inc. | Door choke and cooking apparatus including the same |
US10098190B2 (en) * | 2010-10-07 | 2018-10-09 | Jong Peter Park | Microwaveable vessel |
-
2014
- 2014-11-25 DE DE102014224053.0A patent/DE102014224053A1/en not_active Withdrawn
-
2015
- 2015-10-30 EP EP15791547.1A patent/EP3225079B1/en active Active
- 2015-10-30 WO PCT/EP2015/075220 patent/WO2016083070A1/en active Application Filing
- 2015-10-30 PL PL15791547.1T patent/PL3225079T3/en unknown
- 2015-10-30 US US15/528,122 patent/US20170318630A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3409563A1 (en) * | 1984-03-15 | 1985-09-19 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Microwave oven |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021210592A1 (en) | 2021-09-23 | 2023-03-23 | BSH Hausgeräte GmbH | Cooking chamber door for a microwave oven and microwave oven |
WO2023046447A1 (en) | 2021-09-23 | 2023-03-30 | BSH Hausgeräte GmbH | Cooking chamber door for a microwave oven and microwave oven |
Also Published As
Publication number | Publication date |
---|---|
US20170318630A1 (en) | 2017-11-02 |
PL3225079T3 (en) | 2023-06-12 |
DE102014224053A1 (en) | 2016-05-25 |
WO2016083070A1 (en) | 2016-06-02 |
EP3225079B1 (en) | 2023-03-08 |
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