• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an oven door for a microwave oven (10) or for an oven with a microwave heating function comprising a wave obstruction system. Specifically, the oven door (12) comprises a wave obstruction system (20) formed as or within a door frame of said oven door (12), the wave obstruction system (20) involving a transparent area of the oven door (12). The wave obstruction system (20) includes a frame part (22) and a plurality of wave obstruction elements (26), the frame part (22) includes a base plate (24) on which the wave obstruction elements (26) are secured. In turn, the base plate (24) is arranged parallel to a main plane of the oven door (12) and the wave obstruction elements (26) are arranged in series along the frame part (22) and involve at least partially the transparent area of the oven door (12). The essence of the present invention is the geometric structure of the wave obstruction system, on the one hand, and the arrangement of the wave obstruction elements on the base plate, on the other hand. (...).
    公开号:BR112017016385B1
    申请号:R112017016385-3
    申请日:2015-12-09
    公开日:2021-01-26
    发明作者:Klaus SCHLÖTTERER-FRATOIANNI；Arnd Hofmann；Trevor Specht；Mario Weber
    申请人:Electrolux Appliances Aktiebolag；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to an oven door for a microwave oven or for an oven with a microwave heating function comprising a wave obstruction system according to the preamble of claim 1 In addition, the present invention relates to a corresponding microwave oven or an oven with a microwave heating function, respectively, which comprises an oven door with a wave obstruction system. BACKGROUND OF THE INVENTION
    [002] The strong electromagnetic fields generated by microwave ovens are dangerous to the health of the user. Several security means are provided to maintain the electromagnetic fields inside the microwave oven. Particular attention is paid to the front of the oven door and the gap between the oven door and the front frame. The front of the oven door is normally protected by perforated metal plate, expanded metal or other type of metal surface with periodic openings that allow the view through the oven door. A large transparent area within the oven door would be advantageous. The dimensions of the transparent area on the oven door are limited, since an external portion of the oven door is required for a wave obstruction. Said wave obstruction blocks the circumferential gap between the oven door and the front frame against the electromagnetic fields inside the microwave oven. Said interval has a defined width. However, grease and other pollution deposited in it can change the width of the gap. This can impair the function of the wave obstruction. For maximum attenuation of electromagnetic fields, the width of the gap is about 1 mm or less. The small gap makes it difficult to have a silicone seal on it. The silicone seal would effectively keep heat, moisture, steam and other food treatment products inside the oven cavity.
    [003] Therefore, it would be desirable to have a mechanically robust and compact wave obstruction system with high suppression of microwave leakage and maximum visual area of the oven door. The market trend of increasing the oven cavity, while the external dimensions remain constant, requires a compact wave obstruction system. In addition, the front frame becomes smaller. The metal surface of the front frame acts as a counterpart to the wave obstruction system. The larger the surface of the front frame with respect to the wave obstruction system, the more effective is the suppression of microwave leakage with respect to conventional wave obstruction concepts.
    [004] The document in DE 28 53 616 A1 discloses an oven door with a wave obstruction system for a microwave oven. The wave obstruction system comprises a frame part and a corrugated metal band. The corrugated metal band is attached to the frame part. The frame part and the corrugated metal band at least partially surround the oven door. DESCRIPTION OF THE INVENTION
    [005] It is an object of the present invention to provide an oven door for a microwave oven with an improved wave obstruction system, which is mechanically robust and compact and which allows a relatively large visual area within the oven door.
    [006] The objective is achieved by the oven door to a microwave oven, according to claim 1.
    [007] According to the present invention, a notch is formed in the central portion of the wave obstruction element, so that the central portion of the wave obstruction element is smaller than the open end portion of said wave obstruction element. wave, the notches of the wave obstruction elements being provided to receive an internal glass panel of the oven door, and in which at least two neighboring wave obstruction elements arranged along the same side of the oven door include notches aligned to receive the same edge of the inner glass panel.
    [008] The essence of the present invention is the geometric structure of the wave obstruction system, on the one hand, and the arrangement of the wave obstruction elements on the base plate, on the other hand. The wave obstruction elements allow for very high accuracy. The notches allow for a relatively large internal glass panel which results in a large transparent area of the oven door. The wave obstruction system can be produced at low costs. The notches of the wave obstruction elements provided to receive the inner glass panel of the oven door contribute to a compact structure of the oven door. At least two neighboring wave obstruction elements arranged along the same side of the oven door include notches aligned to receive the same edge of the inner glass panel.
    [009] In addition, the oven door may comprise a door cover that extends over an external portion on the inner side of said oven door.
    [010] For example, the door cover of the oven door is formed as an L-shaped profile part and additionally extends over, at least partially, the circumferential sides of the oven door.
    [011] Additionally, the present invention relates to a corresponding microwave oven or an oven with a microwave heating function comprising an oven door with a wave obstruction system mentioned above.
    [012] In particular, the microwave oven or the oven with microwave heating function, respectively, comprises a front frame that involves a front opening of an oven cavity, said front frame being produced from from metal and forms a counterpart to the wave obstruction system.
    [013] Preferably, the door cover and an external portion of the internal glass panel of the oven door are arranged in front of the front frame in a closed state of said oven door.
    [014] In particular, a gap is formed between the front frame, on the one hand, and the door cover and the outer portion of the inner glass panel, on the other hand, in said closed state of the oven door.
    [015] In addition, the width of a gap between the microwave oven and the oven door is suitable for receiving an elastic seal that is thick enough to act as a vapor tight seal. In particular, the width of said gap is between 2 mm and 4 mm, preferably about 3 mm, in the closed state of the oven door. This width of the interval allows additional cooking function, for example, steam cooking and / or pyrolytic cleaning.
    [016] Furthermore, the front frame can form the counterpart of the oven door wave obstruction system, so that microwaves that penetrate between the front frame and the oven door are conducted to the wave obstruction system.
    [017] In particular, the wave obstruction elements extend from the base plate towards the inside of the oven door.
    [018] For example, the wave obstruction element includes two open end portions and the base plate includes a series of slits, each open end portion of the wave obstruction element penetrating a slot in the base plate.
    [019] In this case, the open end of the wave obstruction element includes at least one flap, preferably at least two flaps, which penetrates through the corresponding slot in the base plate.
    [020] The wave obstruction element is attached to the base plate by deformation of at least one flap and / or twisting of at least one flap and / or welding of the open end portions on said base plate.
    [021] Finally, the microwave oven or the oven with microwave heating function, respectively, comprises at least one seal, the said seal being fixed between the front frame and the outer portion of the glass panel internal in a closed state of the oven door, and, preferably, the seal is produced from silicone. This structure restricts the pollution of the interval.
    [022] New and inventive features of the present invention are presented in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS
    [023] The present invention will be described in greater detail with reference to the drawing, in which:
    [024] Figure 1 illustrates a schematic partial perspective view of an oven door wave obstruction system for a microwave oven, according to a preferred embodiment of the present invention,
    [025] Figure 2 illustrates a schematic partial top view of the oven door for the microwave oven, according to the preferred embodiment of the present invention,
    [026] Figure 3 illustrates a schematic partial perspective view of the oven door wave obstruction system for the microwave oven, according to the preferred embodiment of the present invention,
    [027] Figure 4 illustrates a schematic partial perspective view of the oven door wave obstruction system for the microwave oven, according to the preferred embodiment of the present invention, and
    [028] Figure 5 illustrates a schematic exploded top view of the oven door for the microwave oven, according to the preferred embodiment of the present invention. DESCRIPTION OF ACCOMPLISHMENTS OF THE INVENTION
    [029] Figure 1 illustrates a schematic partial perspective view of a wave obstruction system 20 from an oven door 12 to a microwave oven 10, according to a preferred embodiment of the present invention.
    [030] The wave obstruction system 20 includes a frame part 22 and a plurality of wave obstruction elements 26. In this example, the frame part 22 is a Z-shaped profile part. The frame part 22 includes a base plate 24, on which the wave obstruction elements 26 are attached. Each wave obstruction element 26 is a U-shaped metal strip. The wave obstruction elements 26 are arranged in series along the frame part 22, so that the series of wave obstruction elements 26 forms a wavy structure. The base plate 24 of the frame part 22 includes a series of slots. Each slot is provided to receive an open end portion of the U-shaped wave obstruction element 26. Each wave obstruction element 26 includes two end portions that penetrate a slot in each case.
    [031] In addition, a notch 46 is formed in the central portion of each wave obstruction element 26. Surprisingly, it has been found that wave obstruction element 26 can be incised without any noticeable reduction in the suppression of microwave leakage of the wave obstruction system 20.
    [032] Figure 2 shows a schematic partial cross-sectional top view of oven door 12 for microwave oven 10, according to the preferred embodiment of the present invention,
    [033] The microwave oven 10 comprises an oven cavity 14 and a front frame 16. Said front frame 16 involves a front opening of the oven cavity 14. The front opening of the oven cavity 14 can be closed by the door oven 12. Figure 2 shows the closed state of oven door 12.
    [034] The oven door 12 comprises an obstruction section 30, a door cover 32 and an internal glass panel 34. The obstruction section 30 and the door cover 32 form a rectangular frame of the oven door 12. A The door cover 32 is an L-shaped profile part. On the one hand, the door cover 32 forms the circumferential side of the oven door 12. On the other hand, the door cover 32 forms an external portion of the inner side of the oven. oven door 12. A glue joint 36 connects the door cover 32 to the inner glass panel 34.
    [035] An interval between the front frame 16 of the microwave oven 10 and the oven door 12 is sealed by a seal 18. Said seal 18 is fixed between the inner glass panel 34 of the oven door 12 and the front frame 16 from the microwave oven 10. For example, seal 18 is made from silicone.
    [036] The obstruction section 30 is formed by the wave obstruction system 20 or is provided to receive said wave obstruction system 20. The obstruction section 30 and / or the wave obstruction system 20 form a rectangular frame surrounding the oven door 12. The base plate 24 of the frame part 22 extends parallel to the main plane of the oven door 12. The wave obstruction elements 26 extend from the base plate 24 towards the side inside the oven door 12.
    [037] The notches 26 formed in each wave obstruction element 26 allow a larger area of the inner glass panel 34, since the inner glass panel can extend into the notches 26. This way, the seal 18 can touch the panel internal glass 34 instead of door cover 32. This improves the cleanability of oven door 12, since door cover 32 and its edges must not be polluted. In addition, the glue joint 36 between the door cover 32 and the inner glass panel 34 is arranged outside the high temperature region involved by the seal 18. Thus, the glue joint 36 is in a relatively cold region, which reduces thermal stress on the glue. The seal 18 protects the glue joint 36 and the door cover 32 against excess heat. In this way, the glue joint 36 and the door cover 32 can be produced from materials with a relatively low thermal resistance, which are less expensive.
    [038] The notches 26 of the wave obstruction elements 26 allow for a greater distance between the front frame 16 and the surface sealed by the seal 18. For example, the gap sealed by the seal 18 can be about 3 mm. This relatively large distance allows for a more flexible design of the seal 18. In addition, the relatively large gap allows for additional cooking functions, for example, steam cooking or pyrolytic cleaning.
    [039] Figure 3 illustrates a schematic partial perspective view of the wave obstruction system 20 of the oven door 12 to the microwave oven 10, according to the preferred embodiment of the present invention. In Figure 3 the wave obstruction elements 26 extend downwardly from the base plate 24 and are in a pre-assembled state.
    [040] Each open end portion of the wave obstruction element 26 includes two flaps 28 that penetrate through the slot in the base plate 24. The wave obstruction elements 26 are attached to the base plate 24 deforming the flaps 28 In the pre-assembled state shown in Figure 3 the flaps 28 are not yet deformed.
    [041] Figure 4 illustrates a schematic partial perspective view of the wave obstruction system 20 of the oven door 12 to the microwave oven 10, according to the preferred embodiment of the present invention. In Figure 4, the wave obstruction elements 26 extend downwardly from the base plate 24 and are in an assembled state. The flaps 28 are deformed, so that the wave obstruction elements 26 are attached to the base plate 24. For example, the flaps 28 are twisted and / or stamped. Alternatively or additionally, the wave obstruction elements 26 are connected to the frame part 22 by laser welding. A firm fixation of the wave obstruction elements 26 on the frame part 22 allows minimal electrical resistance between the frame part 22 and the wave obstruction elements 26 and a mechanical stability of the wave obstruction system 20.
    [042] Furthermore, the base plate 24 includes reinforcements 38. Preferably, the reinforcements 38 are elongated and extend parallel to the slits penetrated by the flaps 28. In this example, two reinforcements 38 are arranged beside each slot, so that the slit is between two parallel reinforcements 38.
    [043] Figure 5 illustrates a schematic exploded top view of the oven door 12 for the microwave oven 10, according to the preferred embodiment of the present invention.
    [044] Oven door 12 comprises door cover 32, inner glass panel 34 and wave blocking element 20. Furthermore, oven door 12 comprises two door columns 40 and two intermediate glass panels 42 In Figure 5, only one column of port 40 is shown. In this example, the oven door 12 comprises two intermediate glass panels 42. In general, the oven door 12 may comprise an arbitrary number of intermediate glass panels 42. In addition, the oven door 12 comprises spacer elements 44 for retaining the intermediate glass panels 42.
    [045] Optionally, the frame part 24 of the wave obstruction system 20 can include a flange around the perimeter of the frame part 24 in order to obtain sufficient structural integrity. The curvature and height of said flange can be used to fine-tune the frequency of the highest microwave leak suppression. The notches 26 in the wave obstruction elements 26 can be adapted to said flange and enable an even more compact design.
    [046] The compact structure of the wave obstruction system 20 and the wave obstruction elements 26 allows the enlarged inner glass panel 34, so that the oven door 12 receives a larger transparent area. This can be optimized by expanded mesh or drilled holes of arbitrary shape that can be part of a rough block for the frame part 22. REFERENCE NUMBER LIST 10 microwave oven 12 oven door 14 oven cavity 16 front frame 18 seal 20 wave obstruction system 22 frame part 24 base plate 26 wave obstruction element 28 flap 30 obstruction section 32 door cover 34 internal glass panel 36 glue joint 38 reinforcement 40 door column 42 panel intermediate glass 44 spacer element 46 notch
    权利要求:
    Claims (13)
    [0001]
    1. OVEN DOOR (12) for a microwave oven (10) or for an oven with a microwave heating function, in which: - the oven door (12) comprises a wave obstruction system ( 20) formed as or within an oven door frame (12), - the wave obstruction system (20) surrounds a transparent area of the oven door (12), - the wave obstruction system (20 ) includes a frame part (22) and a plurality of wave obstruction elements (26), - the frame part (22) includes a base plate (24), on which the wave obstruction elements (26 ) are fastened, - the base plate (24) is arranged parallel to a main plane of the oven door (12), - the wave obstruction elements (26) are arranged in series along the frame part (22) and involve at least partially the transparent area of the oven door (12), - the wave blocking element (26) is formed as a U-shaped metal strip, and - the series of obs wave construction (26) on the base plate (24) forms a wavy structure, characterized by a notch (46) being formed in the central portion of the wave obstruction element (26), so that the central portion of the obstruction element wave (26) is smaller than the open end portion of the wave obstruction element (26), the notches (46) of the wave obstruction elements (26) being provided to receive an internal glass panel (34 ) of the oven door (12), and in which at least two neighboring wave obstruction elements (26) arranged along the same side of the oven door (12) include aligned notches (46) to receive the same edge of the panel internal glass (34).
    [0002]
    OVEN DOOR (12) according to claim 1, characterized in that the oven door (12) comprises a door cover (32) which extends over an external portion on the inside of the oven door (12).
    [0003]
    OVEN DOOR (12) according to claim 2, characterized in that the door cover (32) of the oven door (12) is formed as an L-shaped profile part and additionally extends over at least partially, the circumferential sides of the oven door (12).
    [0004]
    4. MICROWAVE OVEN (10) or an oven with a microwave heating function, characterized by the microwave oven (10) or the oven with microwave heating function, respectively, comprising at least one oven door (12) as defined in any one of claims 1 to 3.
    [0005]
    5. MICROWAVE OVEN (10) or oven with microwave heating function, according to claim 4, characterized by the microwave oven (10) or the oven with microwave heating function, respectively, comprising a front frame (16) that involves a front opening of an oven cavity (14), the front frame (16) being produced from metal and forming a counterpart to the wave obstruction system (20) .
    [0006]
    6. MICROWAVE OVEN (10) or oven with microwave heating function, according to claim 5, characterized by the door cover (32) and an external portion of the internal glass panel (34) of the door oven doors (12) are arranged in front of the front frame (16) in a closed state of the oven door (12), in which a gap is formed between the front frame (16), on the one hand, and the door cover (32) and the outer portion of the inner glass panel (34), on the other hand, in the closed state of the oven door (12).
    [0007]
    7. MICROWAVE OVEN (10) or oven with microwave heating function, according to any one of claims 4 to 6, characterized by the width of an interval between the microwave oven (10) and the oven door. oven (12) is suitable to receive an elastic seal (18) that is thick enough to act as a vapor tight seal, in particular the gap width is between 2 mm and 4 mm, preferably about 3 mm, in the state closed of the oven door (12).
    [0008]
    8. MICROWAVE OVEN (10) or oven with microwave heating function, according to any one of claims 5 to 7, characterized in that the front frame (16) forms the counterpart of the wave obstruction system (20 ) of the oven door (12), so that microwaves that penetrate between the front frame (16) and the oven door (12) are led to the wave obstruction system (20).
    [0009]
    OVEN DOOR (12), according to any one of claims 1 to 3, or microwave oven (10) or oven with microwave heating function, according to any of claims 4 to 8 , characterized by the wave obstruction elements (26) extending from the base plate (24) towards the inside of the oven door (12).
    [0010]
    OVEN DOOR (12) according to any of claims 1 to 3 and 9, or microwave oven (10) or oven with microwave heating function, according to any of claims 4 to 8, characterized in that the wave obstruction element (26) includes two open end portions and the base plate (24) includes a series of slits, each open end portion of the wave obstruction element (26) penetrating a slot in the base plate (24).
    [0011]
    OVEN DOOR (12) or microwave oven (10) or oven with microwave heating function, according to claim 10, characterized by the open end of the wave obstruction element (26) including at least at least one flap (28), preferably at least two flaps (28), which penetrate through the corresponding slot in the base plate (24).
    [0012]
    OVEN DOOR (12) or microwave oven (10) or oven with microwave heating function, according to any one of claims 10 to 11, characterized in that the wave obstruction element (26) is attached to the base plate (24) by deformation of at least one flap (28) and / or twisting of at least one flap (28) and / or welding of the open end portions on the base plate (24).
    [0013]
    13. MICROWAVE OVEN (10) or oven with microwave heating function, according to any one of claims 11 to 12, characterized by the microwave oven (10) or the oven with heating function by microwave, respectively, comprise at least one seal (18), the seal (18) being fixed between the front frame (16) and the outer portion of the inner glass panel (34) in a closed state of the oven (12), and preferably, the seal (18) is produced from silicone.
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    同族专利:
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    EP3057381B1|2017-08-23|
    CN107251647B|2020-08-11|
    AU2015382516A1|2017-06-29|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA1120551A|1977-12-13|1982-03-23|Shuji Ohkawa|Door seal arrangement for high-frequencyheating apparatus|
    AU590528B2|1984-11-20|1989-11-09|Matsushita Electric Industrial Co., Ltd.|Door assembly for microwave heating apparatus|
    KR100233437B1|1997-06-25|1999-12-01|윤종용|Door of a microwave oven|
    CN1752571B|2004-09-20|2010-05-05|乐金电子电器有限公司|Electromagnetic wave screening structure for microwave oven door|
    EP2271177B1|2009-07-02|2013-02-27|Electrolux Home Products Corporation N.V.|A wave choke system for an oven door of a microwave oven|
    EP2731404B1|2012-11-12|2020-04-08|Electrolux Home Products Corporation N.V.|An oven door for a microwave oven or a multifunctional oven with microwave heating function|
    CN103836684B|2012-11-23|2016-10-12|美的集团股份有限公司|For the fire door assembly of microwave oven and the microwave oven with it|
    CN203628745U|2013-12-25|2014-06-04|美的集团股份有限公司|Oven door of microwave oven|WO2015024177A1|2013-08-20|2015-02-26|Whirlpool Corporation|Method for detecting the status of popcorn in a microwave|
    US10993293B2|2013-12-23|2021-04-27|Whirlpool Corporation|Interrupting circuit for a radio frequency generator|
    US11191133B2|2014-09-17|2021-11-30|Whirlpool Corporation|Direct heating through patch antennas|
    EP3266281B1|2015-03-06|2021-04-21|Whirlpool Corporation|Method of calibrating a high power amplifier for a radio frequency power measurement system|
    EP3305019A4|2015-06-03|2019-06-19|Whirlpool Corporation|Method and device for electromagnetic cooking|
    WO2017119910A1|2016-01-08|2017-07-13|Whirlpool Corporation|Multiple cavity microwave oven insulated divider|
    EP3409076B1|2016-01-28|2020-01-15|Whirlpool Corporation|Method and apparatus for delivering radio frequency electromagnetic energy to cook foodstuff|
    JP6775027B2|2016-02-15|2020-10-28|パナソニック株式会社|Methods and equipment for transmitting high frequency electromagnetic energy to cook food|
    EP3451794A1|2017-09-01|2019-03-06|Whirlpool Corporation|Crispness and browning in full flat microwave oven|
    US11039510B2|2017-09-27|2021-06-15|Whirlpool Corporation|Method and device for electromagnetic cooking using asynchronous sensing strategy for resonant modes real-time tracking|
    US10772165B2|2018-03-02|2020-09-08|Whirlpool Corporation|System and method for zone cooking according to spectromodal theory in an electromagnetic cooking device|
    US10912160B2|2018-07-19|2021-02-02|Whirlpool Corporation|Cooking appliance|
    法律状态:
    2020-07-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-12-08| B09A| Decision: intention to grant|
    2021-01-26| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 09/12/2015, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP15154584.5|2015-02-11|
    EP15154584.5A|EP3057381B1|2015-02-11|2015-02-11|An oven door for a microwave oven|
    PCT/EP2015/079052|WO2016128088A1|2015-02-11|2015-12-09|An oven door for a microwave oven|
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