WO2023046447A1 - Garraumtür für ein mikrowellengargerät sowie mikrowellengargerät - Google Patents
Garraumtür für ein mikrowellengargerät sowie mikrowellengargerät Download PDFInfo
- Publication number
- WO2023046447A1 WO2023046447A1 PCT/EP2022/074569 EP2022074569W WO2023046447A1 WO 2023046447 A1 WO2023046447 A1 WO 2023046447A1 EP 2022074569 W EP2022074569 W EP 2022074569W WO 2023046447 A1 WO2023046447 A1 WO 2023046447A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- septum
- teeth
- cooking chamber
- door
- tooth
- Prior art date
Links
- 238000010411 cooking Methods 0.000 title claims abstract description 75
- 238000005452 bending Methods 0.000 claims description 38
- 238000013016 damping Methods 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000005855 radiation Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 101100204059 Caenorhabditis elegans trap-2 gene Proteins 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 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 invention relates to a cooking chamber door for a microwave cooking appliance, having at least one quarter-wave trap with a plurality of septum teeth arranged next to one another in a row, the base of which lies in the same plane.
- the invention also relates to a microwave cooking appliance, having a cooking chamber whose loading opening is surrounded by a muffle flange, and such a cooking chamber door.
- the invention can be applied particularly advantageously to microwave cooking appliances with an uneven, in particular cambered, muffle flange.
- Microwave traps in the form of so-called ⁇ /4 or quarter-wave traps are widely known as shielding devices.
- Quarter-wave traps can be traps submerged in the cooking chamber, such as described in DE 33 287 48 A1, and/or can be located on the door, for example behind an inner glass pane of the door, such as in EP 1 426 692 A1 or DE 28 536 16 A1.
- microwave traps which consist of two or more cascading quarter-wave traps, as disclosed, for example, in EP 2 271 177 A1.
- Lambda quarter traps located on the outer edge of the door, which are covered by a microwave-transparent material to protect against damage and dirt, are particularly common, as disclosed in US 20110290230 A1 and EP 3 225 079 A1, for example.
- a special feature of EP 3 225 079 A1 is that this quarter-wave trap is also suitable for muffle flanges which do not lie geometrically in one plane, but are spherical in shape (so-called “cambering”). This spherical shape offers advantages, in particular with regard to the thermal properties and deformation properties of the flange under the influence of heat.
- a disadvantage here, however, is the increase in complexity in the overall structure of the door.
- a cooking chamber door for a microwave cooking appliance having at least one microwave trap structure based on the operating principle of a quarter-wave trap with a plurality of septum teeth arranged next to one another in a row, the base of which lies in the same plane, with at least two of the septum teeth having different heights.
- the base of the septum teeth lies in the same plane, they can be manufactured simply and inexpensively by means of a bending process along a straight edge ("main bending line"). Due to their different heights, the advantage is achieved that their distance to a muffle flange of a loading opening to be closed by the cooking chamber door, in particular to an uneven, e.g. cambered, muffle flange can be adjusted. This in turn enables a high damping effect to be maintained.
- a muffle flange is understood to mean, in particular, the flange surrounding the loading opening of the cooking space, which is also referred to as a muffle, or the edge of the muffle bent over in the form of a band.
- the muffle flange can be an integral portion of the muffle or can be manufactured separately and subsequently attached to the muffle, eg welded thereto.
- a septum tooth is understood to mean, in particular, a strip bent up from a band-shaped edge (“septum”), for example made of sheet metal, along a main bending line, in particular by 90°. The attachment of the strip to the main bend line can also be referred to as its base.
- the septum tooth is bent one more time or - usually - two more times, in particular each time by 90° in the same direction, so that the septum tooth then has the shape of an "L" with one further bending, with two further bendings Bend over to form a square "U".
- L-shaped septum teeth can be produced particularly inexpensively, while U-shaped septum teeth enable particularly effective microwave damping. In the following, only microwave traps with "U"-shaped septa teeth are described further without loss of generality.
- Septa teeth arranged next to one another can in particular be understood to mean septa teeth which are arranged in succession along a common main bending line.
- the height of a septum tooth corresponds to a length of the section (“first tooth section”) between the main bending line and the first following bending line, in particular when it is angled by 90°. When angled by 90°, this is analogous to the distance between the section ("second tooth section") between the two bending lines following the main bending line and the plane defined by the septum.
- the fact that at least two of the septum teeth have different heights can therefore mean that the length of the first tooth section is different for at least two of the septum teeth.
- the basic shape of the septum teeth can fundamentally also be designed differently.
- the individual tooth sections can be straight, or at least one of the tooth sections can be curved. Tooth sections that meet one another on one or more bending lines can also assume a bending angle there that is greater or smaller than 90°.
- all septum teeth have the same width and/or basic shape (eg the same bending angle). It is a further development that the second tooth sections of all septa teeth have the same length. It is a further development that the lambda quarter trap has a circumferential row of septum teeth. In particular, four septum or edge sections are formed, each with a plurality of septum teeth arranged next to one another, with the septum teeth of a common edge section having the same main bending line.
- edge sections can include, in particular, an upper edge section that runs horizontally when the door is open, a lower edge section that runs parallel to and at a distance from the upper edge section, a left edge section that runs vertically when the door is open, and a right edge section that runs parallel to and at a distance from the left edge section .
- These edge sections can merge directly into one another, or between two respective edge sections there can be a transition section with a septum tooth which has a main bending line which is inclined relative to the edge sections.
- a height of septum teeth arranged on a common edge section of the cooking chamber door increases from the middle of the edge section to the ends of the edge section. This is particularly advantageous if the cooking chamber door is intended to cover a muffle flange that is convex, e.g. spherical or oval.
- At least two septa teeth arranged next to one another on a common edge section have the same height. This makes it easier to manufacture these septa teeth.
- a further advantage is that if the section of the muffle flange opposite these septum teeth is not flat, the then slightly different distances between the septum teeth and the muffle flange result in a broadening of the effective frequency of the trap.
- a septum tooth with a greater height has a ("third") tooth section between the front edge and the bending line closest thereto, the length of which is shorter than a length of a third tooth section of a septum tooth with a comparatively lower height.
- the advantage is achieved that a shift in the effective frequency of a septum tooth can be corrected to a desired effective frequency by changing the length of its third tooth section, and in particular can be completely compensated for.
- a length of the septa teeth (ie their length in the non-bent state) and a length of the second tooth section are the same for at least two septa teeth with different heights.
- the length of the first tooth section corresponding to the height of a septum tooth plus the length of the third tooth section is the same for the septum teeth. So if a septum tooth is taller than another septum tooth, its third tooth section will be shorter by the same amount. However, alternatively, the length of the septa teeth may be different for at least two septa teeth of different heights.
- the cooking chamber door has an overlapping surface that protrudes on the appliance side within an area surrounded by the septum teeth and thus also by the septum, which is designed in the shape of a muffle flange.
- the septa teeth are machined out of a septum, which represents an edge region of the door base that is one piece with a door base of the cooking chamber door.
- the septum with the septum teeth represents an integral subarea of the one-piece door base. Because the septum teeth can have different heights, their bending lines can also run in a straight line if the overlapping surface is uneven. As a result, it is advantageously possible to dispense with a separate production of the septum provided with the septum teeth and subsequent attachment to the door base by welding. As there is no need for welding processes, the bottom of the door can be manufactured more cost-effectively, with greater process stability, e.g. due to the reduced influence of thermal welding distortion and varying alignment accuracy of the individual parts. It can then also be produced in large quantities with a low degree of scatter in a repeatable, more precise manner.
- the object is also achieved by a microwave cooking appliance which has a cooking chamber whose loading opening is surrounded by a muffle flange and a cooking chamber door as described above.
- the microwave cooking appliance can be designed analogously to the cooking chamber door and vice versa, and provides the same advantages. It is a further development that the microwave cooking appliance is a household microwave cooking appliance.
- the microwave cooking appliance can be a stand-alone appliance or can be a combination appliance.
- the combination appliance can be, for example, an oven/microwave combination appliance, a microwave/steamer combination appliance or a combination appliance with all three of these functions.
- the muffle flange is an uneven muffle flange. This can be advantageous in order to improve the thermal properties and deformation properties of the muffle flange under the influence of heat.
- An uneven muffle flange can in particular be understood to mean a muffle flange whose surface on the door side does not lie in one plane.
- the door-side surface of such a muffle flange can have a height variation in the circumferential direction.
- the muffle flange is a muffle flange that is curved at least in sections spherically or ovally, at least in the circumferential direction. This is particularly easy to produce.
- a muffle flange can be understood in particular as a muffle flange whose door-side surface has a spherical or oval shape protruding in the direction of the door along at least one of its (upper, lower, left and/or right) edge sections. In one development, only the upper and lower edge sections are domed, in another development only the left and right edge sections, and in yet another development all edge sections.
- the surface shape of the muffle flange is not limited in principle and can be wavy or free-form in the circumferential direction, for example.
- the muffle flange is an uneven muffle flange and a distance (“tooth spacing”) d of the septum teeth from the muffle flange is at least approximately the same when the cooking chamber door is closed. In this way, a particularly high maximum attenuation can advantageously be achieved, even if only in a comparatively narrow range of the microwave frequency.
- the tooth distance d of a septum tooth can be understood in particular as its shortest distance from the muffle flange when the door is closed.
- the tooth spacing can correspond to the spacing of the front edge of the first tooth section from the muffle flange. at bending by 90° compared to the first tooth section, this also corresponds to the distance between the second tooth section and the muffle flange.
- a tooth spacing d of the septa teeth from the muffle flange is within a predetermined bandwidth b with b>0 when the cooking chamber door is closed.
- septum teeth with the same door spacing c can have different heights by up to b, or septa teeth with door spacings that differ by up to b can have the same height.
- a still effective damping effect of the microwave trap can be achieved in an even wider frequency range of the microwaves, both with a flat and with an uneven muffle flange.
- the bandwidth b has proven to be particularly advantageous for the bandwidth b to be at least approximately 0.5 mm, since this results in a very particularly advantageous effective frequency broadening of the microwave trap with continued very effective damping.
- the muffle flange is an uneven muffle flange
- the door distance c which also corresponds to the local distance between the septum and the muffle flange, is therefore conceptually divided into steps [co; Co + Si[, [co + Si; Co + S2[ with Si, S2 divided into the step heights of the first, second etc. height step. All septa teeth whose door spacing c falls within one of these height levels have the same height.
- the smallest distance Co occurs at that Gen point of the muffle flange, which protrudes furthest in the direction of the door or the septum, in the case of a spherically cambered edge section, for example, typically its center.
- the height of the septum teeth of a specific spacing level corresponds to the mean spacing of this spacing level minus the specified bandwidth.
- the height of the septum teeth increases with successive spacing steps by the bandwidth b.
- the tooth spacing d can remain in the same range of values, in particular for different spacing stages.
- 1 shows a door base of a cooking chamber door for a microwave cooking appliance, which has a septum with a plurality of septum teeth, in a view obliquely from above;
- 2 shows a sectional side view of a sketch of a septum tooth which, when the appliance door is closed, is opposite a muffle flange of the microwave cooking appliance;
- FIG. 3 shows a sectional side view of a septum built into the cooking compartment door, which is opposite a muffle flange of the microwave cooking appliance when the appliance door is closed;
- FIG. 4 shows a top view of a sketch, not true to scale, of an edge section of the muffle flange with the septum section lying opposite;
- FIG. 5 shows a plan view, analogous to FIG. 4, of a sketch, not true to scale, of an edge section of the muffle flange with an opposite septum section, without showing the septum teeth;
- FIG. 6 shows, as a plot of a transmission of microwave radiation against a microwave frequency, an attenuation effect of a microwave trap with the same septum teeth, which is not according to the invention.
- FIG. 7 shows a damping effect according to the invention of a microwave trap with different septa teeth as a plot of a transmission of microwave radiation against a microwave frequency.
- FIG. 1 shows an oblique view from above of a door base 1 of a cooking chamber door T for a microwave cooking appliance G, which has a septum 3 with a plurality of teeth ("septum teeth” 4) worked out of it as a microwave trap 2 in the form of a quarter-wave trap.
- the cooking chamber door T can in particular have been machined from a single piece of sheet metal, e.g. using known methods of material processing such as cutting (e.g. laser cutting), bending, deep-drawing, etc.
- the door base 1 has, in particular, a circumferentially projecting overlapping surface 5, which surrounds an opening for a microwave-tight window 6 - shown here already inserted - and which, after installation in the microwave cooking appliance G, has a muffle flange 7 (see, for example, Figures 2 and 3 ) opposite.
- the overlapping surface 5 follows the shape of the muffle flange 7, so that when the cooking chamber door T is closed, there is a gap between them with an at least approximately uniform gap width. If the surface of the muffle flange 7 opposite the cooking chamber door T is not flat, the overlapping surface 5 is not flat either.
- the overlap area 5 The septum 3 surrounding the outside all the way round represents an edge area of the door base 1.
- the septum teeth 4 arranged next to one another of a respective section of the septum 3 have been bent by approx.
- the position of the main bending line 8 thus also corresponds to the position of a base or foot of the septum tooth 4.
- Each of the septum teeth 4 has also been bent by approximately 90° in the same direction on a further bending line 9 and then bent by approximately 90° in the same direction on yet another bending line 10 .
- Each septum tooth 4 therefore has a "U" shape with a first tooth section 11 extending between the main bending line 8 and the bending line 9, in particular extending in a straight line, and a second tooth section extending between the bending line 9 and the bending line 10, in particular extending in a straight line 12 and a third tooth section 13 extending between the bending line 10 and the front edge of the septum tooth 4, in particular extending in a straight line.
- the greatest height perpendicular to the plane of the septum 3 corresponds to the height h of the septum tooth 4. If the tooth sections 11, 12 and 13 are straight and angled at 90° to one another, the height h of the septum tooth 4 corresponds to the length of the first tooth section 11.
- the septum 3 When the appliance door T is closed, the septum 3 is locally a certain distance ("door distance”) c from the muffle flange, and the septum tooth 4 bent up out of the septum 3 is a distance ("tooth distance”) d from the muffle flange 7.
- door distance a certain distance
- the septum 3 has four sections along its circumferential direction, namely an upper section 3a, a lower section 3b, a left section 3c and a right section 3d when the cooking chamber door T is open.
- Each of the sections 3a to 3d has a plurality of septum teeth 4 arranged in a row next to one another.
- the septa teeth 4 of each of the sections 3a to 3d each have the same main bending line 8, but need not have the same bending lines 9 and 10.
- the main bending lines 8 of the upper section 3a and the lower section 3b are parallel to each other and perpendicular to the main bending lines 8 of the left section 3c and the right section 3d.
- transition sections 3e between sections 3a to 3d, each of which has a single septum tooth 4 whose main bending line is angularly offset by 45° to main bending lines 8 of adjacent sections 3a to 3d.
- This trap geometry is used to achieve full shielding even in the corners.
- FIG. 3 shows a sectional side view of a septum 4 built into the cooking chamber door T, which is opposite a muffle flange 7 of the microwave cooking apparatus G when the appliance door T is closed and the cooking chamber 16 is thus covered at the front.
- a cover 14 mounted on the septum tooth 4 is also shown, which serves to protect the septum tooth 4, for example.
- a seal 15 is attached to the cover 14 and seals a gap between the overlapping surface 5 and the cover 14 .
- the cover 14 and/or the seal 15 can be made of a microwave-transparent material, for example a silicone material.
- FIG. 4 shows a top view of a sketch of an edge section of the muffle flange 7 with the opposite edge or septum section 3a, 3b, 3c or 3d of the cooking chamber door T.
- the surface of the muffle flange 7 opposite the cooking chamber door T is uneven, namely here symmetrically spherical or oval cambered.
- the muffle flange can have a surface that is similar in shape to that of an ellipsoid of revolution.
- FIG. 5 shows a plan view analogous to FIG. 4 of a sketch of an edge section of the muffle flange 7 with an opposite edge or septum section 3a, 3b, 3c or 3d of the septum 3 without showing the septum teeth with different section areas Ai, A2 and A3 and distances Co to C3 and b.
- the door distance c between the septum 3 (and thus the base of the septum teeth) and the muffle flange 7 increases starting from a shortest door distance Co in the middle of the sections towards the edge according to the shape of the muffle flange 7.
- the resulting value range of the door distance c can borrowed, starting from the shortest door distance Co, into several (here: three) partial areas or distance levels, here for example in the three distance levels [Co; Co + b[, [co + b; Co + 2b[ and [Co + 2b; Co + 3 b[, where the step heights of all distance steps correspond to the bandwidth b.
- Corresponding section areas Ai, A2 and A3 are assigned to these three distance levels.
- all of the septum teeth 4-1 whose door spacing c is associated with the first (lowest) spacing level and therefore falls within the section areas Ai have the same height hi.
- FIG. 6 shows a transmission of microwave radiation in mode IS21I through a microwave trap not according to the invention in dB versus a microwave frequency f in MHz.
- This plot was created using a simulation of a household appliance G, which has a flat muffle flange and a cooking chamber door similar to the cooking chamber door T from FIG. If, as has been customary up to now, an identical geometry of the septum teeth prevails all around the cooking chamber door, an ideal active frequency of the microwave trap, at which maximum damping occurs, is also identical all around.
- the ideal effective frequency is roughly in the middle of an ISM band considered here, which ranges from 2400 MHz to 2500 MHz.
- the main effective frequency of the microwave source is chosen, here a magnetron with 2446 MHz.
- the transmission achieves an attenuation of -80dB.
- a damping of at least -60dB should be achieved, which is given here, as indicated by the double arrow shown in broken lines, within a drawn frequency range of effective frequencies between 2435 MHz and 2457 MHz and thus with a frequency width of approx. 22 MHz . Outside of this frequency range, increased leakage radiation may occur, which should be avoided for the safety of users and, if necessary, for normative reasons.
- the frequency range of the effective frequencies can be shifted with an attenuation of at least ⁇ 60 dB.
- a microwave source is often not frequency-stable: a magnetron with an operating frequency anywhere between 2420 MHz and 2480 MHz will work within its specification. It is therefore advantageous if a microwave trap is used whose frequency range of the active frequencies with attenuation of at least ⁇ 60 dB is as wide as possible.
- the absolute "depth of attenuation" is of secondary interest: if a leakage radiation of 0.5 mW/cm 2 is emitted with an attenuation of - 60 dB, it is 0.05 mW/cm 2 at - 70 dB and 0.05 mW/cm 2 at - 80 dB 0.005mW/ cm2 . In each case, this is well below the usual limit values of 1.0 mW/cm 2 to 10 mW/cm 2 . However, as shown above, the values of 0.05mW/cm 2 are only achieved in a narrow frequency band.
- FIG. 7 shows an attenuation of a transmission of microwave radiation in mode IS21I in dB versus a microwave frequency f in MHz for a microwave trap 2 with septum teeth 4-1, 4-2, 4-3 of different heights, e.g. as in principle using the septum teeth 4 -1 , 4-2, 4-3 shown in Fig.4.
- the gradual classification of the heights of the septum teeth 4-1, 4-2, 4-3 results in a surprising advantage: This is due to the fact that the changing geometry of the muffle flange leads to a slight shift in the effective frequency of individual septum teeth locally in relation to the opposing septum teeth. As can be seen from FIG.
- the tooth spacing d between the septa teeth 4-1, 4-2, 4-3 and the muffle flange 7 is different for most, in particular all, septa teeth 4-1, 4-2, 4-3 . Since the tooth spacing d influences the damping effect of the respective septum tooth 4-1, 4-2, 4-3, the result is a spreading of the position of the associated ideal effective frequencies. To put it graphically, there is no longer just one microwave trap that acts uniformly, but rather a superimposition of many traps corresponding to the individual septum teeth 4-1, 4-2, 4-3.
- the bandwidth of the effective frequencies which has an attenuation of at least ⁇ 60 dB, is advantageously increased from approximately 22 MHz to approximately 28 MHz. This results in increased stability with respect to manufacturing tolerances and/or the use of microwave sources with greater frequency variability.
- the present invention can thus be applied—also generally—to flat muffle flanges.
- Deviations or variations in the geometry of the septum teeth which lead to shifts in their effective frequencies, can be introduced in a targeted manner. Such deviations can, for example, affect the length of the first tooth section and thus the height of the septum teeth and/or the length of the third tooth section. If necessary, the length of the second tooth section can also be varied.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22773463.9A EP4406362A1 (de) | 2021-09-23 | 2022-09-05 | Garraumtür für ein mikrowellengargerät sowie mikrowellengargerät |
CN202280064457.1A CN118044335A (zh) | 2021-09-23 | 2022-09-05 | 用于微波烹饪器具的烹饪室门以及微波烹饪器具 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102021210592.0A DE102021210592A1 (de) | 2021-09-23 | 2021-09-23 | Garraumtür für ein Mikrowellengargerät sowie Mikrowellengargerät |
DE102021210592.0 | 2021-09-23 |
Publications (1)
Publication Number | Publication Date |
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WO2023046447A1 true WO2023046447A1 (de) | 2023-03-30 |
Family
ID=83398256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/074569 WO2023046447A1 (de) | 2021-09-23 | 2022-09-05 | Garraumtür für ein mikrowellengargerät sowie mikrowellengargerät |
Country Status (4)
Country | Link |
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EP (1) | EP4406362A1 (de) |
CN (1) | CN118044335A (de) |
DE (1) | DE102021210592A1 (de) |
WO (1) | WO2023046447A1 (de) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1465106A (en) * | 1973-05-02 | 1977-02-23 | Amana Refrigeration Inc | Microwave heating apparatus |
DE2853616A1 (de) | 1977-12-13 | 1979-07-05 | Hitachi Heating Appl | Anordnung zur tuerabdichtung fuer eine hochfrequenz-erwaermungsanlage |
DE3328748A1 (de) | 1982-08-18 | 1984-02-23 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Hochfrequenzheizgeraet |
US5750969A (en) * | 1995-12-29 | 1998-05-12 | Lg Electronics Inc. | Microwave choke apparatus for microwave oven |
EP1426692A2 (de) | 2002-12-03 | 2004-06-09 | Miele & Cie. KG | Mikrowellenherd |
EP2271177A1 (de) | 2009-07-02 | 2011-01-05 | Electrolux Home Products Corporation N.V. | Drosselspulensystem für eine Herdtür eines Mikrowellenherds |
US20110290230A1 (en) | 2010-05-26 | 2011-12-01 | Lg Electronics Inc. | Door choke and cooking apparatus including the same |
EP3225079A1 (de) | 2014-11-25 | 2017-10-04 | BSH Hausgeräte GmbH | Haushaltsgargerät |
US20180020511A1 (en) * | 2015-02-11 | 2018-01-18 | Electrolux Appliances Aktiebolag | An oven door for a microwave oven |
-
2021
- 2021-09-23 DE DE102021210592.0A patent/DE102021210592A1/de active Pending
-
2022
- 2022-09-05 CN CN202280064457.1A patent/CN118044335A/zh active Pending
- 2022-09-05 WO PCT/EP2022/074569 patent/WO2023046447A1/de active Application Filing
- 2022-09-05 EP EP22773463.9A patent/EP4406362A1/de active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1465106A (en) * | 1973-05-02 | 1977-02-23 | Amana Refrigeration Inc | Microwave heating apparatus |
DE2853616A1 (de) | 1977-12-13 | 1979-07-05 | Hitachi Heating Appl | Anordnung zur tuerabdichtung fuer eine hochfrequenz-erwaermungsanlage |
DE3328748A1 (de) | 1982-08-18 | 1984-02-23 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Hochfrequenzheizgeraet |
US5750969A (en) * | 1995-12-29 | 1998-05-12 | Lg Electronics Inc. | Microwave choke apparatus for microwave oven |
EP1426692A2 (de) | 2002-12-03 | 2004-06-09 | Miele & Cie. KG | Mikrowellenherd |
EP2271177A1 (de) | 2009-07-02 | 2011-01-05 | Electrolux Home Products Corporation N.V. | Drosselspulensystem für eine Herdtür eines Mikrowellenherds |
US20110290230A1 (en) | 2010-05-26 | 2011-12-01 | Lg Electronics Inc. | Door choke and cooking apparatus including the same |
EP3225079A1 (de) | 2014-11-25 | 2017-10-04 | BSH Hausgeräte GmbH | Haushaltsgargerät |
US20170318630A1 (en) * | 2014-11-25 | 2017-11-02 | BSH Hausgeräte GmbH | Cooking household appliance |
US20180020511A1 (en) * | 2015-02-11 | 2018-01-18 | Electrolux Appliances Aktiebolag | An oven door for a microwave oven |
Also Published As
Publication number | Publication date |
---|---|
DE102021210592A1 (de) | 2023-03-23 |
CN118044335A (zh) | 2024-05-14 |
EP4406362A1 (de) | 2024-07-31 |
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