EP3310129A1 - Appareil de cuisson - Google Patents

Appareil de cuisson Download PDF

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Publication number
EP3310129A1
EP3310129A1 EP17190024.4A EP17190024A EP3310129A1 EP 3310129 A1 EP3310129 A1 EP 3310129A1 EP 17190024 A EP17190024 A EP 17190024A EP 3310129 A1 EP3310129 A1 EP 3310129A1
Authority
EP
European Patent Office
Prior art keywords
heat
antenna
conductor
cooking appliance
plug
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
Application number
EP17190024.4A
Other languages
German (de)
English (en)
Other versions
EP3310129B1 (fr
Inventor
Jürgen Scharmann
Jürgen WENGLER
Thomas Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Priority to PL17190024T priority Critical patent/PL3310129T3/pl
Publication of EP3310129A1 publication Critical patent/EP3310129A1/fr
Application granted granted Critical
Publication of EP3310129B1 publication Critical patent/EP3310129B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B6/72—Radiators or antennas
    • 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
    • H05B6/642—Cooling of the microwave components and related air circulation systems

Definitions

  • the present invention relates to a cooking appliance having at least one heatable cooking chamber and at least one antenna device having at least one antenna unit for transmitting and / or receiving high-frequency radiation into the cooking chamber or from the cooking chamber.
  • antennas In heated cooking chambers arranged antennas are usually exposed to correspondingly high temperatures. In heating mode, temperatures above 200 ° C. frequently occur at the antenna itself and also at the attachment point of the antenna in the cooking chamber. During a pyrolytic cleaning even temperatures of over 400 ° C can occur. Particularly unfavorable is that also heat the wires to power the antenna.
  • the insulation material of conventional antenna lines is usually not suitable for such temperatures, since it is made of plastic.
  • the cooking appliance according to the invention comprises at least one heatable cooking chamber and at least one antenna device with at least one antenna unit for transmitting high-frequency radiation into the cooking chamber and / or for receiving high-frequency radiation from the cooking chamber.
  • the antenna unit comprises at least one transmitting / receiving element and at least one conductor connected to the transmitting / receiving element.
  • the conductor is thermally conductively connected to at least one device component by at least one heat-conducting element for enlarging an effective surface for the heat transfer and / or the conductor is interrupted by at least one thermal insulation device.
  • the heat-conducting element dissipates heat from it to the device component.
  • the interruption by the isolation device is capacitively bridged by means of a coupling device, so that signals and / or power can be transmitted via the interrupted conductor.
  • the cooking appliance according to the invention offers many advantages.
  • the heat-conducting element and / or the thermal insulation device offer a considerable advantage. Unwanted temperature increases in heat-sensitive areas of the antenna device and in particular in the coaxial line and downstream components is thereby effectively counteracted.
  • the heat transfer from the antenna unit to the conductor can thus be significantly reduced. This reduces the thermal losses of the conductor. This is particularly advantageous with correspondingly higher transmission powers and, for example, when using the antenna unit for heating the food. In addition, this can be dispensed with the use of costly Hochtemperaturkoaxialtechnischen.
  • the heat-conducting element and / or the thermal insulation device can also be used in cramped space conditions to reduce the heat transfer.
  • the antenna unit is in particular arranged at least partially in the cooking chamber.
  • the transmitting / receiving element is arranged in the cooking chamber and preferably arranged exposed.
  • the antenna unit is visible and / or accessible or arranged in the cooking chamber.
  • the antenna unit comprises at least two conductors.
  • the at least two conductors provide at least one inner conductor and at least one outer conductor.
  • the outer conductor is associated with the heat conducting element.
  • the inner conductor is associated in particular with the thermal insulation device. Possible is also a reverse Assignment.
  • the outer conductor is preferably connected to at least one reference potential terminal of the transmitting / receiving element.
  • the inner conductor is connected in particular to at least one feed connection or to a feed-in point of the transmitting / receiving element.
  • the inner conductor and the outer conductor are arranged coaxially.
  • the inner conductor and the outer conductor are arranged in a coaxial line.
  • the temperature can be reduced considerably by means of the insulating device and / or the heat conducting element.
  • one end of the interrupted conductor is surrounded by at least one insulating layer.
  • the insulating layer is surrounded by at least one electrically conductive coupling sleeve.
  • another end of the interrupted conductor is connected to the coupling sleeve.
  • the insulating layer is formed thermally insulating. It is also preferable that the insulating layer is electrically insulating. In particular, the insulating layer is not electrically conductive or very low.
  • the insulating layer is preferably formed from a glass material.
  • the insulating layer may also be formed of a ceramic material and / or plastic. It is also possible that the insulating layer comprises at least one layer of air.
  • the insulating layer is formed as an insulating sleeve.
  • the inner conductor extends at least partially into the sleeve and / or the insulating sleeve is at least partially surrounded by the coupling sleeve.
  • the insulating layer is provided by at least one glass sleeve.
  • a glass sleeve offers a particularly good and cost-effective thermal insulation.
  • the coupling sleeve is designed in particular as a metal sleeve.
  • the metal sleeve extends at least partially around the insulating layer.
  • insulating layer and coupling sleeve are arranged coaxially or concentrically with each other.
  • the insulating device is associated with at least one plug device with at least two plug-in units which can be connected to one another in a detachable manner.
  • the insulating layer and / or the coupling sleeve is arranged in one of the two plug units.
  • insulating layer and / or the coupling sleeve can be pushed onto one end of the conductor by plugging the plug units together. This achieves a detachable connection between the transmitting / receiving element and the conductor.
  • both the thermal decoupling and the capacitive coupling can be produced by plugging together the plug units. It is also advantageous that the connection is easily releasable yet durable. It is possible that the insulating layer and / or the coupling sleeve are arranged in two plug units. In particular, the plug units are arranged outside the cooking chamber. As a result, the unwanted heat transfer can be interrupted particularly effectively.
  • one of the two plug units is provided by at least one antenna adapter.
  • the transmitting / receiving element is attached to the antenna adapter and / or mounted in the cooking chamber.
  • Such an antenna adapter allows a particularly rapid installation of the transmitting / receiving element.
  • the thermal insulation device is arranged in a region of the antenna adapter which is located outside the cooking chamber.
  • the conductor and in particular the inner conductor is formed by an extension of a feed web of the transmitting / receiving element.
  • the feed bar runs in particular transversely to the transmitting / receiving element.
  • the conductor and in particular the outer conductor is provided by an adapter sleeve which can be mounted on the cooking chamber wall on the antenna adapter.
  • the adapter sleeve extends through a cooking chamber wall except for the side facing away from the cooking chamber.
  • the adapter sleeve can be screwed to the cooking chamber wall, for example, by means of at least one union nut. Other suitable fastening means are also possible.
  • Such an adapter sleeve allows for a mounting of the antenna adapter to the cooking chamber wall and also a permanent and reliable connection of the outer conductor.
  • at least one grounding bar is connected to the adapter sleeve.
  • the grounding bar is preferably electrically conductively connected to the transmitting / receiving element.
  • one of the two plug units is connected to a coaxial line.
  • the coaxial line is used in particular for transmitting high-frequency signals and / or high-frequency power.
  • that plug unit is connected to the coaxial line, which also includes the insulating layer and / or the coupling sleeve.
  • the plug unit of the coaxial line is connectable to the plug unit provided by the antenna adapter.
  • the heat-conducting element is heat-conductively connected to an actively cooled device component.
  • the actively cooled device component is cooled, for example, by at least one air flow.
  • the heat-conducting element is heat-conductively connected to a passively cooled device component.
  • the heat-conducting element is connected to a particular metallic housing of the device component.
  • the heat-conducting element can also be heat-conductively connected to a housing structure and / or another partial device structure of the cooking appliance.
  • the device component is for example an electronic component.
  • the device component comprises at least one control device and / or at least one power electronics.
  • the device component may also include or be part of at least one high frequency generator. Due to the significantly lower temperature level of the device component, the heat energy of the transmitting / receiving element or of the antenna adapter can be dissipated particularly well via the heat conducting element, so that the temperature of the connected coaxial line can be reduced particularly well.
  • the heat-conducting element is preferably arranged outside the cooking chamber.
  • the heat-conducting element is located outside of an insulation surrounding the cooking chamber. But it is also possible that the heat-conducting element is at least partially disposed in an insulation surrounding the cooking chamber.
  • the heat-conducting element is plate-shaped.
  • the heat-conducting element comprises at least one metal plate and / or a metal sheet or is formed as such.
  • Such a heat-conducting is inexpensive and also provides a very effective heat dissipation.
  • the heat-conducting element is associated with a plug device with two plug units which can be connected to one another in a detachable manner.
  • the plug device is particularly preferably the plug device already described above.
  • the heat conducting element is attached to one of the plug units.
  • the heat-conducting element is detachably fastened to the plug unit and screwed, for example.
  • the heat-conducting element is fastened by a fastening device to the plug unit, by means of which also the plug unit is fastened to the cooking chamber wall.
  • the heat-conducting element is arranged on the plug unit, to which also the coaxial line is connected.
  • the heat-conducting element can also be fastened to the plug unit, which is provided by the antenna adapter.
  • the heat-conducting element is attached to the plug unit, to which the thermal insulation device or the insulating layer and / or the coupling sleeve are assigned.
  • the heat-conducting element is attached to a plug-in unit designed as an angle plug. This is advantageous, for example, in confined space conditions.
  • the heat conducting element is connected in an L-shaped extending portion of the conductor to this, so that the heat conducting element is transverse to a part of the conductor.
  • the transmitting / receiving element comprises a free-standing end portion and a grounded end portion with a grounding bar. Between the end sections, in particular a feed web is arranged.
  • the feed bar and the ground bar run transversely to the transceiver element, so that an F-shaped structure of the antenna unit results in a side view.
  • the F-shaped structure results in particular in a side view of a cross section or longitudinal section of the antenna unit.
  • the inner conductor is connected to the feed bar.
  • the outer conductor is connected to the earthing bar.
  • the grounding bar is connected to the adapter sleeve of the antenna adapter.
  • the feed web lies in particular at an entry point between the end sections.
  • the antenna unit is designed as an F-shaped antenna and in particular as an inverted F-shaped antenna.
  • the transmitting / receiving element is elongated or rod-shaped.
  • the transmitting / receiving element can also be formed areally.
  • the antenna unit is particularly formed as a planar inverted F-shaped antenna.
  • the grounding bar preferably comprises a section running parallel to the transmitting / receiving element, which section is fixed in an electrically conductive manner to the antenna adapter.
  • the parallel to the transmitting / receiving element extending portion of the earthing land is riveted and / or welded and / or screwed, for example, to the antenna adapter or the adapter sleeve.
  • the section is formed integrally with the earthing land, for example, by forming.
  • the portion of the earthing land is tapered to the feed point. This results in a particularly compact connection of the grounding bar to the antenna adapter or the adapter sleeve.
  • the transmitting / receiving element and the feeder bar and the grounding bar are attached to the antenna adapter.
  • This has the advantage that in the production of the cooking appliance, only the antenna adapter must be mounted in the cooking chamber to secure the transmitting / receiving element together with feed bridge and grounding bar.
  • the feed bar extends in particular transversely to the cooking chamber wall, on which the antenna unit is arranged.
  • the earthing land also runs at least in sections transversely to the cooking space wall, on which the antenna unit is arranged.
  • the grounding bar is connected in an electrically conductive manner to at least one cooking chamber wall and / or to another grounded appliance partial structure.
  • the free-standing end portion comprises at least one bend.
  • Such bending has the advantage that the length of the transmitting / receiving element required for the high-frequency radiation to be emitted or received can be achieved with a reduced extent of the transmitting / receiving element.
  • the bend is hook-shaped and / or S-shaped.
  • the free-standing end portion is designed in the manner of a question mark geometry.
  • the bend may include one and preferably two or more turns.
  • the bend runs in a plane.
  • the bend runs in a plane to a cooking chamber wall, on which the antenna unit is arranged.
  • Such a bend offers good transmission or reception properties and allows an arrangement of the antenna unit without unfavorable space consumption. For example, required minimum distances to heating elements or other cooking compartment components can be maintained.
  • the cooking appliance comprises at least one high-frequency generator.
  • the high frequency generator is suitable and designed to heat food in the cooking chamber by means of high frequency radiation.
  • the antenna unit is preferably suitable and designed for coupling the high-frequency radiation intended for heating into the cooking chamber.
  • the high-frequency radiation provided for heating the food can also be received again by the antenna unit. So z. B. can be determined scattering parameters.
  • the heat-conducting element and / or the thermal insulation device can be used particularly advantageously due to the correspondingly high transmission power.
  • the antenna unit is suitable and designed exclusively for transmitting high-frequency radiation for measuring purposes or measuring radiation.
  • the high-frequency radiation can be provided to characterize the food to be cooked and / or to monitor the cooking process.
  • the measuring radiation is characterized, in particular, by a considerably lower power than the high-frequency radiation provided for heating the food.
  • the measuring radiation is not suitable for effectively heating the food.
  • the antenna unit is suitable and designed to transmit and / or receive both the high-frequency radiation intended for heating the food and the measuring radiation.
  • the antenna device is suitable and designed to transmit the measuring radiation only or only to receive.
  • the antenna unit can be designed, for example, as a pure receiving antenna or a pure transmitting antenna.
  • the antenna device is adapted and configured to transmit and receive.
  • the cooking appliance is suitable and designed for pyrolytic cleaning.
  • the pyrolytic cleaning is provided in particular for cleaning the cooking chamber or the cooking chamber walls and / or in the cooking chamber arranged components.
  • the antenna device is resistant to the temperatures to be expected during pyrolysis by the previously described embodiments.
  • the heat-conducting element and / or the thermal insulation device can be used particularly advantageously, since a reduction in the temperatures in the conductor or in the coaxial line is particularly crucial at the high temperatures to be expected, for example above 400 ° C.
  • the antenna unit is preferably arranged exposed in the cooking chamber.
  • the antenna unit is at least partially surrounded by a tortuous arrangement of the heating element.
  • at least part of the antenna unit lies in a plane with the heating element.
  • at least a part of the antenna unit is arranged set back relative to a plane of the heating element in the cooking chamber. Such an arrangement of the antenna unit is accommodated particularly shockproof. In addition, the available cooking space is not reduced by the antenna unit.
  • the antenna device comprises at least two and preferably a plurality of antenna units.
  • each antenna unit comprises at least one heat-conducting element and / or at least one thermal insulation device.
  • the antenna device is in particular suitable and designed to transmit and / or receive radio-frequency radiation which is taken from a frequency range between 100 megahertz and 10 terahertz.
  • antenna device is suitable and designed for transmitting and / or receiving high-frequency radiation in the microwave range.
  • the frequency range of the antenna device lies in a frequency range of at least one ISM band.
  • the radio-frequency radiation that can be coupled in or out by the antenna device lies in a frequency range between 2.4 GHz and 2.5 GHz and / or between 902 MHz to 928 MHz.
  • the antenna device may comprise antenna units which are suitable and designed for different frequencies.
  • the FIG. 1 shows an inventive cooking appliance, which is designed here as an oven 10 with microwave function or as a combined device.
  • the cooking appliance 1 is provided here as a built-in appliance. But it is also possible that the cooking appliance 1 is designed as a stove or stand unit.
  • the cooking appliance 1 has a heatable cooking chamber 2, which can be closed by a door 104.
  • heating elements 21 are shown in a sectional view in the upper region of the cooking chamber. In the view shown here, the heating elements 21 are covered by the closed door 104.
  • the heating elements 21 shown here are, for example, a top heat heating source and a grill heating source.
  • the heating elements 21 each comprise a plurality of bends, so that a tortuous arrangement results.
  • a high-frequency generator 11 For heating food in the cooking chamber 2 by high-frequency radiation, for example in the frequency range of microwaves, a high-frequency generator 11 is provided here.
  • the high frequency generator 11 is preferably based on semiconductor technology. But it is also possible that the high frequency generator 11 is formed as a magnetron or includes such.
  • the cooking appliance 1 here also has a pyrolytic cleaning function, in which the cooking space is heated to temperatures above 400 ° C. and, for example, 430 ° or more.
  • an antenna device 300 with a plurality of antenna units 3 is provided here.
  • the antenna units 3 are arranged at least partially exposed in the cooking chamber.
  • a transmitting / receiving element 4 of the respective antenna unit 3, which is not shown here, is free in the cooking chamber 2.
  • the antenna units 3 are arranged in other regions of the cooking chamber 2 than shown here.
  • the arrangement and / or number of antenna units 3 is set to the size or geometry of the cooking chamber 2 and to the respective purposes, for example characterizing or heating food to be cooked.
  • the antenna units 3 can also be used to receive high-frequency radiation from the cooking chamber 2, which can be used, for example, to detect high-frequency radiation Scattering parameters can be used.
  • measuring radiation having a considerably lower power than the high-frequency radiation intended for heating the food can also be received and / or transmitted via the antenna units 3.
  • the high-frequency generator 11 is also provided for generating the measuring radiation. The measuring radiation is used, for example, to monitor the cooking process or to characterize the food and, in particular, does not serve to heat the food.
  • the cooking appliance 1 here comprises an operating device 103, via which, for example, an operating mode and / or an automatic function can be selected and set.
  • the operating device 103 also includes a user interface and, for example, a display.
  • the cooking appliance 1 comprises a control device 102 for controlling or regulating device functions.
  • the control device 102 is also suitable and designed for controlling the high-frequency generator 11.
  • the antenna units 3 are arranged here in one plane with the heating elements 21.
  • the antenna units 3 are surrounded by the tortuous arrangement of the heating elements 21 and a heating element 21.
  • a transmitting / receiving element 4, not shown here, of the respective antenna unit 3 is aligned in a plane with the heating elements 21.
  • a minimum distance to the surrounding heating elements 21 is maintained.
  • the minimum distance is defined starting from a feed point 54 (not shown here) of the antenna unit 3.
  • the FIG. 2 shows an antenna unit 3 mounted on a cooking chamber wall 12.
  • the antenna unit 3 comprises a plug device 7 with two plug units 17, 27, which are connected to each other as intended.
  • FIGS. 3 and 4 For clarity, are in the FIGS. 3 and 4 in each case those components of the antenna unit 3 are shown which are associated with one plug unit 17 or the other plug unit 27.
  • the antenna unit 3 here comprises a transmitting / receiving element 4, from which the high-frequency radiation is coupled into the cooking chamber 2 or coupled out of the cooking chamber 2.
  • the transmitting / receiving element 4 is here elongated or rod-shaped and comprises a free-standing end portion 24 and a grounded end portion 34. Between the end portions 24, 34 is a feed point 54, to which a feed bar 14 for Feeding of signals and / or power in the transmitting / receiving element 4 is arranged.
  • the grounded end portion 34 is associated with a grounding bar 44.
  • the grounding bar 44 is formed here in one piece with the grounded end portion 34.
  • the transmitting / receiving element 4 is supplied here via a coaxial line 37 with an inner conductor 13 and an outer conductor 23.
  • a coaxial line 37 For connection of the coaxial line 37, the plug device 7 with the two plug units 17, 27 is provided.
  • a designed as angled connector 47 connector unit 27 is connected to the coaxial line 37.
  • the other plug unit 17 is provided by an antenna adapter 33.
  • the transmitting / receiving element 4 is attached.
  • the grounding bar 44 here comprises a section running parallel to the transmitting / receiving element 4, which section is fixed in an electrically conductive manner to an adapter sleeve 331 of the antenna adapter 33.
  • the antenna adapter 33 also provides, through the adapter sleeve 331, an outer conductor 23 which is connected in an electrically conductive manner to the grounding web 44 and to the grounded end section 34, respectively.
  • the antenna adapter comprises an inner conductor 13, which extends as an extension of the feed bar 14 through the antenna adapter 33.
  • the inner conductor 13 or the feed bridge 14 is decoupled from the outer conductor 23 acting part of the antenna adapter 33 by an insulator 53.
  • the adapter sleeve 331 is provided with an external thread and can be screwed to the cooking chamber wall 12 with a union nut 43.
  • FIG. 3 shows the mounted on a cooking chamber wall 12 antenna adapter 33.
  • the antenna adapter 33 is then by plugging in the FIG. 4 Plug unit 27 shown connected to the coaxial line 37.
  • the plug unit 27 is plugged onto the antenna adapter 33, which also serves as a plug unit 17.
  • a thermal insulation device 6 is provided here.
  • the insulating device 6 interrupts the inner conductor 13 here between antenna adapter 33 and plug unit 27.
  • the insulating device 6 comprises an insulating layer 46 which concentrically surrounds the inner conductor 13 of the antenna adapter 33. As a result, a heat transfer from the inner conductor 13 of the antenna adapter 33 to the inner conductor 13 of the coaxial line 37th Effectively counteracted.
  • the insulating layer 46 is formed here as a glass sleeve into which the inner conductor 13 of the antenna adapter 33 extends.
  • a coupling device 16 is provided here.
  • the coupling device 16 here comprises a metallic coupling sleeve 56 which surrounds the inner conductor 13 of the antenna adapter and the insulating layer 46 concentrically.
  • the inner conductor 13 of the coaxial line 37 is electrically conductively connected to the coupling sleeve 56.
  • the insulating device 6 and the coupling device 16 are associated with that connector unit 27 to which the coaxial cable 37 is connected or which is plugged onto the antenna adapter 33.
  • the glass sleeve of the insulating layer 46 and the coupling sleeve 56 are connected to one another and fastened to the plug unit 27.
  • the geometric dimensions of the coupling device 16 and in particular the coupling sleeve 56 are designed according to the operating frequency and the dielectric constant of the insulating layer 46 and the glass tube.
  • the antenna unit 3 In order to reduce the heat input into the coaxial line 37 through the outer conductor 23 of the antenna adapter 33 during the heating of the cooking chamber 2, the antenna unit 3 here is assigned a heat-conducting element 5.
  • the heat-conducting element 5 is heat-conductively connected to the outer conductor 23 of the plug unit 27 of the coaxial line 37. By contacting with the other plug unit 17, the heat is transmitted from the serving as outer conductor 23 areas of the antenna adapter 33 to the heat conducting element 5.
  • the heat-conducting element 5 is connected to a cooled device component 101 thermally conductive.
  • the device component 101 is located at the lowest possible temperature level, so that a reliable heat transfer in the direction of the device component 101 is achieved.
  • the device component 101 is, for example, an active or air-cooled electronic component of the cooking device 1.
  • the device component 101 comprises a housing to which the heat-conducting element 5 is connected.
  • the heat-conducting element 5 here is plate-shaped, so that the effective surface for the heat transfer surface is advantageously increased.
  • the heat-conducting element 5 is designed as a coupling plate 15.
  • the heat-conducting element 5 is fastened here to the plug unit 27.
  • a particularly uncomplicated alignment of the heat-conducting element 5 already takes place during the production of the plug connection.
  • FIG. 8 shown embodiment of the heat-conducting element 5 as a coupling plate 15 with a passage opening.
  • the heat-conducting element 5 can be screwed to the plug unit 27, for example by means of a screw 25.
  • the plug unit 27 can also be fastened by mounting the heat-conducting element on the device component 101.
  • a cooking space insulation 105 is arranged to prevent heat loss.
  • the cooking space insulation 105 is in the FIG. 2 shown very schematically and was left for clarity in the area of the antenna unit 3.
  • a fiber material is used for this purpose.
  • the thickness of the cooking space insulation 105 is in particular between 10 mm and 30 mm and, for example, 20 mm. Thinner or stronger cooking chamber insulation 105 is also possible.
  • the adapter sleeve 331 of the antenna adapter 33 here extends through the cooking space insulation 105.
  • the part of the antenna adapter 33 designed as a plug unit 17 preferably lies outside the cooking space insulation 105.
  • the plug unit 27 and the coaxial line 37 connected thereto are located outside the cooking space insulation 105. Also outside the cooking chamber insulation are preferably also the heat-conducting element 5 and the associated device component 101 is arranged.
  • the antenna unit 3 is shown in a perspective view looking at the transmitting / receiving element 4.
  • the geometry of the transmitting / receiving element 4 and its attachment to the antenna adapter 33 can be seen particularly well here.
  • the free-standing end portion 24 of the transmitting / receiving element 4 here comprises a bend 8, the extent of the transmitting / receiving element 4 can be reduced without the necessary or advantageous for the desired frequency range length of the transmitting / receiving element 4 is adversely affected ,
  • the bend 8 is hook-shaped here.
  • the bend 8 may also have a different geometry.
  • the bend 8 may for example be S-shaped or formed with further bends.
  • the bend 8 is designed so that the free end portion 24 has minimum distances to other components of the cooking chamber 2 and, for example, to adjacent heating elements 21.
  • the geometry of the bend 8 For example, depending on the positioning of the antenna unit 3 in the cooking chamber 2 are formed differently.
  • the bend 8 shown here runs in a plane.
  • the plane extends parallel to a cooking chamber wall 12, not shown here, on which the antenna unit 3 is arranged in an assembled state of the cooking appliance 1.
  • the cooking chamber wall 12 extends in particular transversely to the adapter sleeve 331, so that the adapter sleeve 331 can be fixed to the cooking chamber wall 12 by means of the union nut 43.
  • the plane in which the bend 8 extends also extends in particular transversely to a section of the grounding web 44.
  • the bend 8 also extends in a plane with the surrounding heating elements 21. This results in a particularly space-saving arrangement the antenna unit 3 possible.
  • the transmitting / receiving element 4 is formed here in one piece.
  • the free end portion 24 and the grounded end portion 34 and the feed bar 14 and the grounding bar 44 in one piece into each other.
  • the inner conductor 13 is formed here by an extension of the feed web 14.
  • the inner conductor 13 is inserted in the region of the antenna adapter 33 in a bore of the feed web 14 and fixed at the feed point 54.
  • the grounding bar 44 here comprises a section running parallel to the transmitting / receiving element 4 or to the grounded end section 34, which is contacted to the antenna adapter 33.
  • the grounding bar 44 is connected to the adapter sleeve 331 electrically conductive.
  • the adapter sleeve 331 goes into the outer conductor 23 of the plug unit 17, so that the grounded end portion 34 is contacted via the grounding bar 44 and the adapter sleeve 331 with the outer conductor 23.
  • FIG. 6 shows the antenna unit 3 of FIG. 5 in a side view, in which the transmitting / receiving element 4 is oriented downward.
  • the upper part of the antenna adapter 33 is here shown partially cut, so that the inner conductor 13 located within the antenna adapter 33 is clearly visible.
  • the inner conductor 13 is inserted into the formed as a glass sleeve insulating layer 46.
  • the coupling sleeve 56 and the inner conductor 13 of the coaxial line 37 connected thereto the two interrupted ends of the inner conductor 13 are capacitively coupled to one another when plugged together.
  • the plug unit 27 and the coaxial line 37 connected thereto are shown in perspective.
  • the plug unit 27 here designed as a coupling plate 15 heat conducting element 5 is attached.
  • the thermal insulation device 6 is integrated, in which extends the inner conductor 13 not visible here.
  • the coupling sleeve 56 of the coupling device 16 protrudes from the plug unit 27.
  • the insulating layer 46 Within the coupling sleeve 56 is not visible here, the insulating layer 46 and, for example, a glass sleeve.
  • FIG. 8 shows the plug unit 27 of FIG. 7 in a side view.
  • the heat-conducting element 5 and the screw 25 serving for fastening the heat-conducting element 5 to the plug unit 27 are shown in an exploded view.
  • the coupling plate 15 is heat conductively connected to the connector unit 27.
  • Such a plug device 7 has the advantage that a reliable and robust and at the same time releasable connection between the transmitting / receiving element 4 in the cooking chamber 2 and the coaxial line 37 connected thereto can be produced. It is particularly advantageous that no metallic spring elements are provided for this purpose, which can often be carried out in the temperature range of a cooking appliance 1 only with very expensive materials.
  • the plug device 7 presented here thus allows a correspondingly low-impedance and durable connection, which is structurally inexpensive and economical to manufacture. This is particularly advantageous if correspondingly high transmission powers must be transmitted, for example for heating food.
  • the temperature in the cooking chamber 2 for example, 430 ° C.
  • temperatures of between 100.degree. C. and 160.degree. C. for example, then occur on.
  • the device internally arranged, actively cooled device component then has, for example, temperatures between 80-100 ° C at its outer housing.
  • the conductors 13, 23 of the coaxial line 37 are at a comparable temperature level as the device component 101. For example, temperatures between 80-100 ° C. occur in or on the coaxial line 37. Without the use of the insulating device 6 and / or the heat-conducting element 5, the heat from the cooking chamber 2 would be undesirably transferred to the coaxial line 37. As a result, there would also be very unfavorable temperatures above 200 ° C and for example 300 ° C or more occur.
  • a conventional high-frequency coaxial line 37 can thus be used without critical temperatures occurring in a heated cooking chamber 2 in or on the line 37.
  • LIST OF REFERENCE NUMBERS 1 Cooking appliance 331 adapter sleeve 2 oven 3 antenna unit 4 Transmitter / receiver element 5 thermally conductive element 6 insulating 7 Plug means 8th bend 10 oven 11 High-frequency generator 12 cooking chamber 13 Ladder, inner conductor 14 Einspeisesteg 15 coupling plate 16 coupling device 17 plug unit 21 heating element 23 Ladder, outer conductor 24 end 25 screw 27 plug unit 33 antenna adapter 34 end 37 coaxial 43 Nut 44 grounding bar 46 insulating 47 angle plug 53 insulator 54 entry point 56 coupling sleeve 101 device component 102 control device 103 operating device 104 door 105 Garraumisol ist 300 antenna means

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Electric Stoves And Ranges (AREA)
EP17190024.4A 2016-10-11 2017-09-08 Appareil de cuisson Active EP3310129B1 (fr)

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PL17190024T PL3310129T3 (pl) 2016-10-11 2017-09-08 Urządzenie do gotowania

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DE102016119286.4A DE102016119286B4 (de) 2016-10-11 2016-10-11 Gargerät

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EP3310129A1 true EP3310129A1 (fr) 2018-04-18
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111417226A (zh) * 2019-01-04 2020-07-14 青岛海尔股份有限公司 加热装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028521A (en) * 1976-02-26 1977-06-07 Roper Corporation Antenna construction for microwave oven
US4091252A (en) * 1975-06-09 1978-05-23 Tokyo Shibaura Electric Co., Ltd. Microwave heating apparatus
DE3034050A1 (de) * 1980-09-10 1982-03-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Mikrowellenofen
US4324967A (en) * 1978-07-18 1982-04-13 Matsushita Electric Industrial Co., Ltd. Microwave heating apparatus having magnetic coupling for driving the antenna
JP2007280786A (ja) * 2006-04-07 2007-10-25 Matsushita Electric Ind Co Ltd マイクロ波発生装置
DE102007055548A1 (de) * 2007-11-21 2009-06-04 Baerlocher Gmbh Vorrichtung zum Eintrag von Mikrowellen in einen Reaktionsraum
EP3035773A1 (fr) * 2014-12-17 2016-06-22 E.G.O. ELEKTRO-GERÄTEBAU GmbH Generateur de micro-ondes et four a micro-ondes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1125378A (fr) * 1978-04-03 1982-06-08 Bernard J. Weiss Systeme de commandes pour four auto-nettoyant four a micro-ondes combines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091252A (en) * 1975-06-09 1978-05-23 Tokyo Shibaura Electric Co., Ltd. Microwave heating apparatus
US4028521A (en) * 1976-02-26 1977-06-07 Roper Corporation Antenna construction for microwave oven
US4324967A (en) * 1978-07-18 1982-04-13 Matsushita Electric Industrial Co., Ltd. Microwave heating apparatus having magnetic coupling for driving the antenna
DE3034050A1 (de) * 1980-09-10 1982-03-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Mikrowellenofen
JP2007280786A (ja) * 2006-04-07 2007-10-25 Matsushita Electric Ind Co Ltd マイクロ波発生装置
DE102007055548A1 (de) * 2007-11-21 2009-06-04 Baerlocher Gmbh Vorrichtung zum Eintrag von Mikrowellen in einen Reaktionsraum
EP3035773A1 (fr) * 2014-12-17 2016-06-22 E.G.O. ELEKTRO-GERÄTEBAU GmbH Generateur de micro-ondes et four a micro-ondes

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DE102016119286B4 (de) 2020-06-10
PL3310129T3 (pl) 2021-01-11
DE102016119286A1 (de) 2018-04-12
EP3310129B1 (fr) 2020-08-05

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