DE102016119286A1 - Cooking appliance - Google Patents

Abstract

The present invention relates to a cooking appliance (1) with a heatable cooking chamber (2) and with an antenna device (300) with an antenna unit (3) for transmitting and / or receiving high-frequency radiation into the cooking chamber (2) or from the cooking chamber (2 ). The antenna unit (3) comprises a transmitting / receiving element (4) and a conductor (13, 23) connected to the transmitting / receiving element. In this case, the conductor (13, 23) is thermally conductively connected to at least one heat-conducting element (5) for enlarging a surface which is effective for the heat transfer to a device component (101) and / or the conductor (13, 23) is connected by a thermal insulation device ( 6) interrupted. The interruption is capacitively bridged by means of a coupling device (16), so that signals and / or power can be transmitted via the interrupted conductor (13, 23).

Description

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.

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. In addition, there are usually thermal losses during transfer. As a rule, these active losses are particularly high when a correspondingly high transmission power is coupled in via the antenna line or the antenna, for example for heating food.

In the prior art, therefore, for example Hochtemperaturkoaxialleitungen have become known which use metal material pressed as an insulator material. Such lines are very expensive. The use of cooking appliances is therefore not very economical.

In addition, it is known in the art to reduce the heat conduction by reducing the diameter of the pipe. However, such a reduction is not always meaningful, since the diameter of the coaxial conductor depends on the currents to be conducted and on the cross section or on the dielectric constant of the insulator.

Furthermore, it has become known in the art to cool the antenna line by an air flow. However, such cooling often has a detrimental effect on the energy balance of the cooking appliance, for example, if it also the cooking chamber is cooled accordingly.

It is therefore the object of the present invention to provide a cooking appliance in which heat from the heated cooking space does not lead to undesirable temperature increases in the antenna line.

This object is achieved by a cooking appliance with the features of claim 1. Preferred features are the subject of the dependent claims. Further advantages and features will become apparent from the general description of the invention and the description of the embodiments.

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. In this case, 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 Hochtemperaturkoaxialleitungen. In addition, 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. In particular, the transmitting / receiving element is arranged in the cooking chamber and preferably arranged exposed. In particular, the antenna unit is visible and / or accessible or arranged in the cooking chamber.

Preferably, the antenna unit comprises at least two conductors. In particular, the at least two conductors provide at least one inner conductor and at least one outer conductor. In particular, the outer conductor is associated with the heat conducting element. The inner conductor is associated in particular with the thermal insulation device. Is possible 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.

In particular, the inner conductor and the outer conductor are arranged coaxially. Particularly preferably, the inner conductor and the outer conductor are arranged in a coaxial line. In a coaxial line, the temperature can be reduced considerably by means of the insulating device and / or the heat conducting element.

It is preferred that in the region of the insulating device one end of the interrupted conductor is surrounded by at least one insulating layer. In particular, the insulating layer is surrounded by at least one electrically conductive coupling sleeve. Preferably, another end of the interrupted conductor is connected to the coupling sleeve. This allows for an effective interruption of heat transfer and on the other hand, a particularly good capacitive bridging the interruption. Preferably, 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. Particularly preferably, the insulating layer is formed as an insulating sleeve. In this case, the inner conductor extends at least partially into the sleeve and / or the insulating sleeve is at least partially surrounded by the coupling sleeve. Preferably, 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. In this case, the metal sleeve extends at least partially around the insulating layer. In particular, insulating layer and coupling sleeve are arranged coaxially or concentrically with each other. By means of such a coupling sleeve, the conductor interrupted by the glass sleeve can be bridged capacitively in a particularly effective and cost-effective manner.

In a particularly advantageous development, 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. In particular, the insulating layer and / or the coupling sleeve is arranged in one of the two plug units. In particular, 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.

This allows a quick and inexpensive installation of the antenna unit in the production of the cooking appliance. It is also advantageous that 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.

Preferably, one of the two plug units is provided by at least one antenna adapter. In this case, 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. By integrating one of the two connector units in the antenna adapter, the necessary connection of the adapter can also be produced in a particularly uncomplicated manner. In particular, the thermal insulation device is arranged in a region of the antenna adapter which is located outside the cooking chamber.

Preferably, in the antenna adapter, 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. Such an antenna adapter allows a structurally particularly inexpensive provision of the inner conductor for the plug unit.

Preferably, 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. In particular, 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. In particular, at least one grounding bar is connected to the adapter sleeve. The earthing bar is preferably with electrically connected to the transmitting / receiving element.

In an advantageous embodiment, 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. Preferably, that plug unit is connected to the coaxial line, which also includes the insulating layer and / or the coupling sleeve.

In particular, the plug unit of the coaxial line is connectable to the plug unit provided by the antenna adapter.

In a particularly preferred embodiment, 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. It is also possible that the heat-conducting element is heat-conductively connected to a passively cooled device component. It is preferred that 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. For example, 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. For example, 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.

It is preferred that the heat-conducting element is plate-shaped. For example, 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.

It is possible that 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. In this case, the plug device is particularly preferably the plug device already described above. Preferably, the heat conducting element is attached to one of the plug units. For example, the heat-conducting element is detachably fastened to the plug unit and screwed, for example. Preferably, 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.

In particular, the heat-conducting element is arranged on the plug unit, to which also the coaxial line is connected. Such a configuration allows a particularly inexpensive installation. However, the heat-conducting element can also be fastened to the plug unit, which is provided by the antenna adapter. In particular, 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.

In an advantageous embodiment, 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. In particular, 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.

In a particularly advantageous embodiment, 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. In particular, 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.

In particular, the inner conductor is connected to the feed bar. In particular, the outer conductor is connected to the earthing bar. In particular, 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. Such an antenna unit can be integrated to save space in the cooking appliance and also offers particularly good transmission properties.

Preferably, the antenna unit is designed as an F-shaped antenna and in particular as an inverted F-shaped antenna. Preferably, the transmitting / receiving element is elongated or rod-shaped. The transmitting / receiving element can also be formed areally. Then, 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. In particular, the section is formed integrally with the earthing land, for example by forming. In particular, 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.

Preferably, 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. In particular, the earthing land also runs at least in sections transversely to the cooking space wall, on which the antenna unit is arranged. In particular, 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.

Particularly preferably, 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. In particular, the bend is hook-shaped and / or S-shaped. For example, 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.

Particularly preferably, the bend runs in a plane. In particular, 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.

It is particularly preferred that the cooking appliance comprises at least one high-frequency generator. In particular, 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. Preferably, 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. In such an antenna unit, the heat-conducting element and / or the thermal insulation device can be used particularly advantageously due to the correspondingly high transmission power.

It is also possible, however, for the antenna unit to be suitable and designed exclusively for transmitting high-frequency radiation for measuring purposes or measuring radiation. For example, 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. In particular, the measuring radiation is not suitable for effectively heating the food. In a particularly preferred embodiment, 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.

It is possible that 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. Preferably, the antenna device is adapted and configured to transmit and receive.

In a likewise particularly preferred embodiment, 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. In this case, the antenna device by the above-described embodiments with respect to the Pyrolysis expected temperatures resistant. In the case of a pyrolytic cleaning, 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.

It is possible that at least one heating element of an electrical resistance heating source is arranged in the cooking chamber. In particular, the heating element serves to heat the cooking chamber and / or for a pyrolytic cleaning of the cooking chamber. In this case, the antenna unit is preferably arranged exposed in the cooking chamber. Preferably, the antenna unit is at least partially surrounded by a tortuous arrangement of the heating element. In particular, at least part of the antenna unit lies in a plane with the heating element. It is also possible that 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.

In particular, the antenna device comprises at least two and preferably a plurality of antenna units. As a result, the desired high-frequency power can be coupled particularly well into the cooking chamber. Preferably, 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. Preferably, antenna device is suitable and designed for transmitting and / or receiving high-frequency radiation in the microwave range. In particular, the frequency range of the antenna device lies in a frequency range of at least one ISM band. By way of example, 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.

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures.

In the figures show:

1 a purely schematic representation of a cooking appliance according to the invention in a front view;

2 a highly schematic representation of an antenna unit in a sectional side view;

3 a part of the antenna unit of 2 ;

4 another part of the antenna unit of 2 ;

5 a schematic representation of an antenna unit in a perspective view;

6 the antenna unit of 5 in a partially sectioned side view;

7 an antenna unit with a coaxial line in a perspective view; and

8th the antenna unit of 7 in a side view.

The 1 shows an inventive cooking appliance, which here as an oven 10 is executed with microwave function or as a combined device. The cooking appliance 1 is intended here as a built-in device. It is also possible that the cooking appliance 1 is designed as a stove or stand unit. The cooking appliance 1 has a heated cooking space 2 which through a door 104 is closable.

For heating the cooking chamber 2 Various heating sources and in particular electrical resistance heating sources are available. For example, the cooking chamber with a Umluftheizquelle, with top heat and / or bottom heat, are heated in the hot air mode and / or with a grill function. Purely schematically here are in the upper part of the cooking chamber 2 heating elements 21 shown in a sectional view. In the view shown here are the heating elements 21 from the locked door 104 covered. For the heating elements shown here 21 For example, it is a top heat source and a grill heat source. The heating elements 21 each comprise a plurality of bends, so that a tortuous arrangement results.

For heating food in the oven 2 by high frequency radiation, for example in the frequency range of microwaves, here is a high frequency generator 11 intended. The high frequency generator 11 is preferably based on semiconductor technology. 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 oven is heated to temperatures above 400 ° C and, for example, 430 ° or more.

For coupling the high-frequency radiation into the cooking chamber 2 here is an antenna device 300 with several antenna units 3 intended. The antenna units 3 are at least partially exposed in the oven arranged. In particular, there is a transmission / reception element (not shown here) 4 the respective antenna unit 3 free in the oven 2 ,

It is possible that the antenna units 3 in other areas of the oven 2 are arranged as shown here. In particular, the arrangement and / or number of antenna units 3 on the size or geometry of the cooking chamber 2 and on the respective purposes, such as characterizing or heating of food to be set.

The antenna units 3 may also be in one embodiment for receiving high frequency radiation from the oven 2 serve, which can be used for example for the detection of scattering parameters. Preferably, via the antenna units 3 Also receive and / or emitted measuring radiation with a significantly lower power than the intended for heating the Garguts radiofrequency radiation. In particular, the high frequency generator is also 11 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 includes an operating device 103 , via which, for example, a 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. In addition, the cooking appliance includes 1 a control device 102 for controlling or regulating device functions. In particular, the control device 102 also for controlling the high-frequency generator 11 suitable and trained.

To the usable volume of the cooking space 2 not to reduce, are the antenna units 3 here in a plane with the heating elements 21 arranged. Here are the antenna units 3 from the spiral arrangement of the heating elements 21 or a heating element 21 surround.

In this case, in particular, a transmitting / receiving element, not shown here 4 the respective antenna unit 3 in a plane with the heating elements 21 aligned.

In particular, in the arrangement of the antenna units 3 a minimum distance to the surrounding heating elements 21 respected. The minimum distance is based on a feed point not shown here 54 the antenna unit 3 Are defined.

The 2 shows one on a cooking chamber wall 12 mounted antenna unit 3 , The antenna unit 3 includes a plug device 7 with two plug units 17 . 27 , which are connected to each other as intended.

For clarity, are in the 3 and 4 in each case those components of the antenna unit 3 shown which of the one plug unit 17 or the other plug unit 27 assigned.

The antenna unit 3 here includes a send / receive element 4 , from which the high-frequency radiation into the cooking chamber 2 coupled or from the oven 2 is decoupled. The send / receive 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 sections 24 . 34 is an entry point 54 on which a feedbridge 14 for feeding signals and / or power into the transceiver element 4 is arranged. The earthed end section 34 is a grounding bar 44 assigned. The earthing bar 44 is here in one piece with the earthed end section 34 educated.

The send / receive element 4 is here via a coaxial line 37 with an inner conductor 13 and an outer conductor 23 provided. For connection of the coaxial line 37 is the plug device 7 with the two plug units 17 . 27 intended. One is as an angle plug 47 trained plug unit 27 on the coaxial line 37 tethered.

The other plug unit 17 is through an antenna adapter 33 made available. On the antenna adapter 33 is the send / receive element 4 attached. This includes the earthing bar 44 here one parallel to the transmitting / receiving element 4 extending portion which is electrically conductive on an adapter sleeve 331 of the antenna adapter 33 is attached. The antenna adapter 33 poses through the adapter sleeve 331 also an outer conductor 23 ready, which is electrically conductive with the earthing bar 44 or the earthed end section 34 connected is.

In addition, the antenna adapter includes an inner conductor 13 , which acts as an extension of the feedbridge 14 through the antenna adapter 33 extends. Here is the inner conductor 13 or the feed bridge 14 opposite to the outer conductor 23 acting part of the antenna adapter 33 through an insulator 53 decoupled.

The adapter sleeve 331 is provided with an external thread and can with a union nut 43 on the cooking chamber wall 12 be screwed.

The 3 shows the on a cooking chamber wall 12 mounted antenna adapter 33 , The antenna adapter 33 is then by plugging in the 4 shown plug unit 27 to the coaxial line 37 connected. This is the plug unit 27 on the same time as a plug unit 17 serving antenna adapter 33 attached.

To reduce the heat input into the antenna adapter 33 downstream components and in particular in the coaxial line 37 here is a thermal insulation device 6 intended. The insulation device 6 interrupts the inner conductor 13 here between antenna adapter 33 and plug unit 27 ,

The insulation device 6 includes an insulating layer 46 , which is the inner conductor 13 of the antenna adapter 33 concentrically surrounds. As a result, a heat transfer from the inner conductor 13 of the antenna adapter 33 on the inner conductor 13 the coaxial line 37 Effectively counteracted. The insulating layer 46 is here designed as a glass sleeve, in which the inner conductor 13 of the antenna adapter 33 extends.

In spite of the interruption of the inner conductor 13 through the insulation device 6 To offer a low electrical resistance for the transmission of high-frequency power or the high-frequency signals, here is a coupling device 16 intended. Through the coupling device 16 the interrupted inner conductor is capacitively bypassed. The coupling device 16 here includes a metallic coupling sleeve 56 , which is the inner conductor 13 of the antenna adapter as well as the insulating layer 46 concentrically surrounds. The inner conductor 13 the coaxial line 37 is with the coupling sleeve 56 electrically connected.

Like in the 4 shown in more detail, are the isolation device 6 and the coupling device 16 the plug unit 27 assigned to which the coaxial line 37 is connected or which on the antenna adapter 33 is plugged. The glass sleeve of the insulating layer 46 and the coupling sleeve 56 connected to each other and to the plug unit 27 attached. By connecting the two plug units 17 . 27 becomes the inner conductor 13 of the antenna adapter 33 in the insulating layer 46 inserted.

The geometric dimensions of the coupling device 16 and in particular the coupling sleeve 56 are according to the operating frequency and the dielectric constant of the insulating layer 46 or the glass tube designed.

To the heat input into the coaxial line 37 through the outer conductor 23 of the antenna adapter 33 during heating of the cooking chamber 2 to reduce, is the antenna unit 3 here a heat-conducting element 5 assigned. The heat-conducting element 5 is heat conducting to the outer conductor 23 the plug unit 27 the coaxial line 37 tethered. By contacting with the other plug unit 17 The heat from the as outer conductor 23 serving areas of the antenna adapter 33 to the heat-conducting element 5 passed.

To dissipate the heat is the heat conducting element 5 to a refrigerated device component 101 connected 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 reached. The device component 101 is, for example, an active or air-cooled electronic component of the cooking appliance 1 , For example, the device component includes 101 a housing to which the heat conducting element 5 is connected.

To further improve the heat transfer, the heat-conducting element 5 here plate-shaped, so that the effective heat transfer surface is advantageously increased. For example, the heat-conducting element 5 as a coupling plate 15 educated.

The heat-conducting element 5 is here at the plug unit 27 attached. Thus, a particularly uncomplicated orientation of the heat-conducting takes place 5 already during the production of the plug connection.

Particularly advantageous is the in the 8th shown embodiment of the heat conducting element 5 as a coupling plate 15 with a passage opening. Through the passage opening, the heat conducting element 5 at the plug unit 27 for example by means of a screw 25 be screwed. This has the advantage that by mounting the heat-conducting element on the device component 101 also the plug unit 27 can be attached.

On the cooking space 2 opposite side of the cooking chamber 12 is a cooking space insulation 105 arranged to prevent heat loss. The cooking space insulation 105 is in the 2 shown very schematically and became the better clarity in the area of the antenna unit 3 spared. For example, a fiber material is used for this purpose. The strength 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 is also possible 105 ,

The adapter sleeve 331 of the antenna adapter 33 extends here through the cooking space insulation 105 , The as a plug unit 17 trained part of the antenna adapter 33 is preferably outside of the oven insulation 105 , Also the plug unit 27 and the coaxial line connected to it 37 are located outside the oven insulation 105 , Also outside the cooking chamber insulation are preferably also the heat conducting element 5 and the associated device component 101 arranged.

In the 5 is the antenna unit 3 in a perspective view overlooking the transmitting / receiving element 4 shown. The geometry of the send / receive element 4 and its attachment to the antenna adapter 33 are particularly easy to recognize here.

The free-standing end section 24 the send / receive element 4 here includes a bend 8th As a result, the extent of the transmitting / receiving element 4 can be reduced without the necessary or advantageous length of the transmitting / receiving element for the desired frequency range 4 is adversely affected. The bend 8th is here hook-shaped. The bend 8th but can also have a different geometry. The bend 8th For example, it may be S-shaped or formed with further bends.

Preferably, the bend 8th designed so that the free-standing end section 24 Minimum distances to other components of the cooking chamber 2 and, for example, to adjacent heating elements 21 having. In doing so, the geometry of the bend 8th for example, depending on the positioning of the antenna unit 3 in the oven 2 be formed differently.

The bend shown here 8th runs in a plane. The plane extends parallel to a cooking chamber wall, not shown here 12 to which the antenna unit 3 in a mounted state of the cooking appliance 1 is arranged. The cooking chamber wall runs 12 in particular transversely to the adapter sleeve 331 so that the adapter sleeve 331 on the cooking chamber wall 12 by means of the union nut 43 can be fixed.

The plane in which the bend 8th extends, in particular extends transversely to a portion of the earthing land 44 , In an operating state of the cooking appliance 1 the bend runs 8th also in one plane with the surrounding heating elements 21 , As a result, a particularly space-saving arrangement of the antenna unit 3 possible. An arrangement in which the transmitting / receiving element 4 or the bend 8th in a plane with the heating element 21 lie, for example, in the 1 shown very schematically.

The send / receive element 4 is here formed in one piece. Thereby go the free end section 24 and the grounded end portion 34 as well as the feedbridge 14 and the earthing bar 44 one piece into each other. The inner conductor 13 is here by an extension of the feedbridge 14 educated. For example, the inner conductor 13 in the area of the antenna adapter 33 into a hole in the feed bar 14 inserted and at the entry point 54 attached.

The earthing bar 44 here includes one parallel to the transmitting / receiving element 4 or to the earthed end section 34 extending portion, which on the antenna adapter 33 is contacted. The earthing bar 44 is the adapter sleeve 331 electrically connected. The adapter sleeve 331 goes into the outer conductor 23 the plug unit 17 over, so the grounded the end section 34 over the earthing bar 44 and the adapter sleeve 331 with the outer conductor 23 is contacted.

The 6 shows the antenna unit 3 of the 5 in a side view, in which the transmitting / receiving element 4 is oriented downwards. The upper part of the antenna adapter 33 Here is shown partially cut, so that within the antenna adapter 33 lying inner conductor 13 easy to recognize. By attaching the other plug unit 27 on the plug unit shown here 17 becomes the inner conductor 13 in the formed as a glass sleeve insulating layer 46 inserted. Through the coupling sleeve 56 and the inner conductor attached to it 13 the coaxial line 37 when mating the two broken ends of the inner conductor 13 capacitively coupled with each other.

In the 7 is the plug unit 27 and the coaxial line connected to it 37 shown in perspective. At the plug unit 27 Here is the coupling sheet 15 trained heat conducting element 5 attached. Moreover, in the plug unit 27 the thermal insulation device 6 integrated, in which the here not visible inner conductor 13 extends. In the perspective shown here is the coupling sleeve 56 the coupling device 16 from the plug unit 27 out. Inside the coupling sleeve 56 is not visible here the insulating layer 46 and, for example, a glass sleeve. When plugging on the plug unit 17 of the antenna adapter 33 becomes the thermal insulation device 6 together with the coupling device 16 on the in the antenna adapter 33 lying inner conductor 13 postponed.

The 8th shows the plug unit 27 of the 7 in a side view. In this case, the heat-conducting element 5 and for fixing the heat-conducting element 5 at the plug unit 27 Serving screw 25 shown in an exploded view. Through the screw 25 becomes the coupling plate 15 Heat conductive at the plug unit 27 tethered. After plugging with the plug unit 17 of the antenna adapter 33 so can the in the oven 2 absorbed heat to the coupling plate 15 and from there to the device component not shown here 101 be dissipated.

This has the advantage that the coaxial line 37 does not have to be cooled by a stream of air. This is particularly advantageous because otherwise the cooking space due to the air flow 2 surrounding cooking space insulation 105 would be cooled energetically unfavorable. Likewise, this may affect the use of additional heatsinks for the coaxial line 37 be omitted, which would otherwise occupy considerable space.

Such a connector 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 oven 2 and the coaxial line connected thereto 37 can be produced. It is particularly advantageous that no metallic spring elements are provided, which in the temperature range of a cooking appliance 1 often can only be performed with very expensive materials. The plug-in device presented here 7 thus allows a corresponding low-resistance 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.

In an exemplary operating state, the temperature in the cooking chamber 2 for example 430 ° C. Inside the cooking appliance 1 and outside the cooking space 2 surrounding cooking space insulation 105 For example, temperatures between 100 ° C and 160 ° C occur. The device internally arranged, actively cooled device component then has, for example, temperatures between 80-100 ° C at its outer housing.

By the presented here thermal insulation device and the heat-conducting element 5 are the ladder 13 . 23 the coaxial line 37 at a comparable temperature level as the device component 101 , For example, occur in or on the coaxial line 37 Temperatures between 80-100 ° C. Without the use of the insulation device 6 and / or the heat-conducting element 5 would the heat from the cooking chamber 2 undesirably on the coaxial line 37 transfer. As a result, there would also be very unfavorable temperatures above 200 ° C and for example 300 ° C or more occur. Through the heat-conducting element 5 and / or the insulating device 6 Thus, a conventional high-frequency coaxial line 37 be used without it in a heated cooking space 2 in or on the line 37 comes to critical temperatures.

LIST OF REFERENCE NUMBERS

1

 Cooking appliance

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

 Garraumisolierung

300

 antenna means

331

 adapter sleeve

Claims (15)

Cooking appliance ( 1 ) with at least one heatable cooking space ( 2 ) and at least one antenna device ( 300 ) with at least one antenna unit ( 3 ) for transmitting and / or receiving high-frequency radiation into the cooking chamber ( 2 ) or from the cooking chamber ( 2 ), wherein the antenna unit ( 3 ) at least one transmitting / receiving element ( 4 ) and at least one conductor connected to the transmitting / receiving element ( 13 . 23 ), characterized in that the conductor ( 13 . 23 ) by at least one heat conducting element ( 5 ) for enlarging a surface which is effective for the heat transfer to at least one device component ( 101 ) is thermally conductive, so that heat from the conductor ( 13 . 23 ) via the heat-conducting element ( 5 ) to the device component ( 101 ) and / or that the conductor ( 13 . 23 ) by at least one thermal insulation device ( 6 ) is interrupted and that the interruption by means of a coupling device ( 16 ) is capacitively bridged so that signals and / or power are transmitted through the interrupted conductor ( 13 . 23 ) are transferable. Cooking appliance ( 1 ) according to the preceding claim, characterized in that the antenna unit ( 3 ) at least two conductors ( 13 . 23 ), which at least one inner conductor ( 13 ) and at least one outer conductor ( 23 ) and that the Leader ( 23 ) the heat conducting element ( 5 ) and / or that the inner conductor ( 13 ) the thermal insulation device ( 6 ) assigned. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that in the region of the insulating device ( 6 ) one end of the interrupted conductor ( 13 . 23 ) of an insulating layer ( 46 ) and that the insulating layer ( 46 ) of an electrically conductive coupling sleeve ( 56 ), at which another end of the interrupted conductor ( 13 . 23 ) is attached. Cooking appliance ( 1 ) according to the preceding claim, characterized in that the insulating layer ( 46 ) is formed from a glass material and / or the coupling sleeve ( 56 ) is formed of a metal material. Cooking appliance ( 1 ) according to one of the two preceding claims, characterized in that the insulating device ( 6 ) a plug device ( 7 ) with two detachably connectable plug units ( 17 . 27 ) and that the insulating layer ( 46 ) and / or the coupling sleeve ( 56 ) in one of the two plug units ( 17 . 27 ) and by plugging the plug units ( 17 . 27 ) on one end of the ladder ( 13 . 23 ) are pushed. Cooking appliance ( 1 ) according to the preceding claim, characterized in that one of the two plug units ( 17 . 27 ) by an antenna adapter ( 33 ) is provided, on which the transmitting / receiving element ( 4 ) and in the cooking chamber ( 2 ) and that in the antenna adapter ( 33 ) the ladder ( 13 . 23 ), in particular the inner conductor ( 13 ), by an extension of a feeder ( 14 ) of the transmitting / receiving element ( 4 ) is formed and / or that on the antenna adapter ( 33 ) the ladder ( 13 . 23 ), in particular the outer conductor ( 23 ), by a on a cooking chamber wall ( 12 ) mountable adapter sleeve ( 331 ) provided. Cooking appliance ( 1 ) according to one of the two preceding claims, characterized in that one of the two plug units ( 17 . 27 ) on a coaxial line ( 37 ) is attached. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the heat-conducting element ( 5 ) on an actively cooled device component ( 101 ) Is heat conductively connected. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the heat-conducting element ( 5 ) outside the cooking chamber ( 2 ) is arranged. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the heat-conducting element ( 5 ) is plate-shaped. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the heat-conducting element ( 5 ) a plug device ( 7 ) with two detachably connectable plug units ( 17 . 27 ) and that the heat conducting element ( 5 ) on one of the plug units ( 17 . 27 ) is attached. Cooking appliance ( 1 ) according to the preceding claim, characterized in that the heat-conducting element ( 5 ) on one as an angle plug ( 47 ) formed plug unit ( 17 . 27 ) is attached. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the transmitting / receiving element ( 4 ) a free-standing end section ( 24 ) and a grounded end portion ( 34 ) with a grounding bar ( 44 ) and that between the end sections ( 24 . 34 ) a feeder bar ( 14 ) is arranged and that the feed bridge ( 14 ) and the earthing bar ( 44 ) across the transmitting / receiving element ( 4 ), so that in a side view, an F-shaped structure of the antenna unit ( 3 ). Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the cooking appliance ( 1 ) at least one high-frequency generator ( 11 ) and that food in the cooking chamber ( 2 ) by means of the high frequency generator ( 11 ) is heatable by high-frequency radiation and that the antenna unit ( 3 ) for emitting the intended for heating high-frequency radiation in the cooking chamber ( 2 ) is suitable and designed. Cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the cooking appliance ( 1 ) is suitable and designed for pyrolytic cleaning.

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