EP1783434B1 - Arrangement of an electric appliance in a built-in furniture and method to control it - Google Patents

Description

The invention relates to the arrangement of an electrical appliance in a built-in furniture, such as a hob in a countertop with base units, and a method for controlling an electrical appliance in such an arrangement.

If electrical appliances such as cooktops or ovens are installed in built-in furniture, it must be ensured in accordance with safety regulations that the temperature in or on the built-in furniture does not exceed permissible limits during operation. Since plastic and wood are often used as materials for built-in furniture, in the case of excess temperature there is not only the general danger of damage to the built-in furniture, but also a concrete risk of fire. Of course this is to be avoided. For most electrical appliances or arrangements of electrical appliances in built-in furniture, however, a temperature monitoring in the electrical appliance against its excess temperature is already present, for example, to avoid excessive temperatures on a ceramic hob plate of a hob. Therefore, it has hitherto been sufficient to monitor this temperature and thus automatically automatically cover or avoid unacceptable excess temperatures on a built-in furniture.

However, if you want to achieve even higher temperatures than previously with even higher power generation in electrical appliances, especially hobs with new materials for cooktops, so there is a danger that at least during prolonged operation an inadmissibly high temperature is reached on the built-in furniture. This must be avoided.

The DE 3315333 shows a hob with multiple thermal circuit breakers. In this case, the hob has four hotplates and per hotplate, such a temperature protection is provided. These temperature protection switches are used to switch off at a too high temperature at the respective hob.

Task and solution

The invention has for its object to provide an aforementioned arrangement and a method mentioned, with which disadvantages of the prior art can be avoided and a practical and limited in terms of effort monitoring against overtemperatures is possible.

This object is achieved by an arrangement having the features of claim 1 and a method having the features of claim 13. Advantageous and preferred embodiments of the invention are the subject matter of further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference. Although some of the features below are described only once. You should however, independently of each other and independently of one another, they may apply to both the order and the method.

The electrical appliance has at least one heating device and a heated surface or a heated space, preferably as an electric cooking appliance, ie as a hob, oven or the like .. According to the invention, at least two temperature sensors are provided which at different areas of the electrical appliance in the field of built-in furniture or effective direction for Built-in furniture are arranged out, outside the electrical appliance. They serve to detect the ambient temperature of the electrical appliance or on the adjacent built-in furniture or on its adjacent areas or areas.

Likewise, the heat emitted into the built-in furniture heat can be detected. By at least two temperature sensors, it is possible to detect the entire ambient temperature for the entire electrical appliance, if their arrangement is appropriately matched to the design of the electrical appliance or the surrounding built-in furniture. Since such electrical appliances such as in particular electric cooking appliances are usually box-shaped or parallelepiped-shaped, in the case of hobs also relatively flat, it is conceivable to arrange temperature sensors not only on the outside of the electrical appliance, but at opposite corners with some distance to it. This allows them to perform an almost complete room monitoring around the electrical appliance. This will be explained in more detail below.

In one embodiment of the invention, it is possible to arrange or attach the temperature sensors to the outside of the electrical appliance. This is advantageously done directly on an outer wall, for example by screwing, gluing or clamping. This has the advantage that a temperature sensor does not protrude far from the electrical appliance or, under certain circumstances, is arranged directly thereon. So a pre-assembly is possible and the electrical device is still easy to handle.

In another embodiment of the invention, at least one temperature sensor is arranged at a certain distance from the electrical appliance, preferably with a few centimeters. This has the advantage that temperature distortions are eliminated by the temperature directly on the outside of the electrical appliance itself, since higher temperatures can rule as at a distance of a few centimeters or on the nearest wall of the built-in furniture. In this basic embodiment, it is also possible that a temperature sensor is attached by means of a holder which is attached to the electrical appliance or projects therefrom. Thus, the temperature sensor has a certain distance from the electrical appliance or its outer wall. Advantageously, can be adjusted by the holder, the distance of the temperature sensor of the electrical appliance, for example, to adapt to different installation situations in the built-in furniture. Advantageously, a temperature sensor is brought as close as possible to the built-in furniture or a wall of the built-in furniture. Brackets can, for example, swivel arms, spring arms, telescopic arms or the like. be.

According to an alternative embodiment, the temperature sensor is arranged or attached directly to the built-in furniture, in particular on one of its walls. Thus, the temperature measurement is actually done at the place that is to be protected against overtemperature. An attachment can by gluing, screws or the like. respectively. The temperature sensor is then still signal transmitting to connect to the electrical appliance or with its control. This is done advantageously with little effort by a cable. Alternatively, signal transmitting radio links or the like. imaginable. Likewise, a temperature sensor may be formed as an RFID temperature sensor with a known remote query that does not require its own power supply. Such temperature sensors are also known in principle to the person skilled in the art.

The arrangement of a temperature sensor at a corner or in a corner region of the electrical appliance has the advantage that, as it were, a larger monitoring space is achieved as a result. Advantageously, most or even all temperature sensors are provided at corners or in corner regions of the electrical appliance.

It may also be advantageous to provide a temperature sensor centered under the electrical appliance. This is particularly advantageous in the case of cooktops, because they have a surface mainly mainly downwardly facing heat radiation because of their low installation height and large area. This can be detected very well by such a centrally located temperature sensor.

For the training of temperature sensors, there are several possibilities. In simple variants, a temperature sensor can work thermomechanically. For this purpose, it can have different sensor parts with different thermal relative expansions, for example known as a rod regulator or capillary tube regulator. Such a temperature sensor can either perform a switching movement itself and generate a switching signal at a certain adjustable temperature or transmit a switching movement to the electrical appliance.

For more diverse evaluation or for better monitoring of limit temperatures as well as any current temperatures electrical or electronic temperature sensors can be used. Particularly advantageous are resistance temperature sensors that are small, inexpensive and robust.

According to another possibility, a temperature sensor can detect the temperature via thermal radiation. Particularly advantageous here are IR sensors. These have the advantage that they are for example arranged directly on the electrical appliance and can be directed to the outside or to a specific location on the built-in furniture. Thus, no protruding from the electrical appliance or external parts are needed, while the temperature detection can be done at a remote location of the electrical appliance at the same time. Thus, not only an air temperature in a space between the electrical appliance and built-in furniture or wall of the built-in furniture can be detected, but actually the temperature of the wall of the built-in furniture directly. To further Improvement can be applied to the built-in furniture in a designated location a special coating or surface that improves the temperature detection for an IR sensor, for example, on defined surface or Strahlungsigenschaften.

As an electrical appliance, on the one hand, an electric cooktop is advantageously viewed with a cooktop panel or cooktop panel with radiant heaters underneath. Especially with cooktop panels made of glass ceramic, the maximum allowable temperatures have increased because of new glass-ceramic materials, so that just the resulting in installation in a built-in furniture temperatures can be higher and thus more critical than before. As a further advantageous electrical appliance with temperature monitoring, an oven or cooking appliance is generally considered. Even with an oven, it could, for example, in a long-lasting pyrolysis for self-cleaning to unacceptably high temperatures in the area.

Advantageously, an electrical appliance has a further temperature detection in its interior for detecting a maximum permissible inner limit temperature, about the temperature-sensitive components such as circuit components or the like. protect from over temperature. On the one hand, this temperature detection can mechanically work or trigger. In a simple embodiment, it does not have to spend a variable actual temperature value, but above all to avoid a further increase in temperature when an internal limit temperature is exceeded. For this purpose, it can interrupt a power supply to a single heater or to the whole electrical appliance directly, which is especially advantageous if damage to a temperature detection or control have already occurred by overtemperature.

On the other hand, a temperature sensor inside can also be signal-transmitting connected to the controller and output a current temperature value. This can be used for a driving method for the determination serve the temperature inside the electrical appliance to be able to determine based on the temperature data from external temperature sensors, the temperature conditions at certain points or around the electrical appliance around it.

By the arrangement described above, it is possible according to the invention to detect or determine temperatures in the environment of the electrical appliance or on surfaces or walls of the built-in furniture. A proper use of the electrical appliance below a first prevailing threshold temperature requires no intervention. Thus, it is also possible to work with particularly high power of the heaters of the electrical appliance. If the first limit temperature is exceeded, but the second limit temperature has not yet been reached, the temperature sensors and the control recognize this. It can then be provided that the power to a heating device is reduced by a corresponding control of the electrical device or a display is made to an operator. Within this temperature range, operation of the electrical appliance is still permissible, however, it is just made aware that an exceeding of this permissible range threatens. If the second limit temperature is also exceeded, a reduction in power at least one heating device is mandatory. This can be done in different ways, which will be explained in more detail below.

The first limit temperature can be selected in a range between 80 ° C and 110 ° C. Advantageously, it is chosen to be about 90 ° C. At such a temperature most materials, especially wood and many plastics, not damaged. The second limit temperature can be chosen considerably higher, for example between 150 ° C and 190 ° C, preferably to about 170 ° C. From these temperatures there is the risk of damage or possibly in the case of wood, chipboard and also many plastics Plastic even fire hazard. In this respect, this limit temperature should be adhered to in all cases or not permanently exceeded.

The control of the electrical appliance is designed to determine the temperature conditions around the electrical appliance or on the built-in furniture from the temperature information of the aforementioned temperature sensors. For this purpose, it is also possible to use data from a database stored in the controller or a memory. For example, data sets can be stored that determine all temperature conditions for specific temperature profiles at characteristic points at which the temperature sensors are arranged outside the electrical appliance. These data records can be determined by tests with the manufacturer of the electrical appliance.

In this determination, it may be provided that the controller also detects the amount of power generation at the various heating devices. Thus, the controller knows, so to speak, which heater generates heat in general and in particular at what level. This can be used, in particular in combination with the aforementioned data sets, to carry out a very precise detection of the temperature conditions around the electrical appliance at a relatively manageable expense for temperature sensors, in particular only two or three pieces.

Advantageously, the temperature can be determined by a temperature detection described above at some points around the electrical appliance. For this purpose, it is sufficient to provide a few temperature sensors, for example two or three, at selected locations and to deduce from the temperatures recorded thereby to the total temperature conditions. Furthermore, this makes it possible to perform a reduction in power to heaters so that only for the critical areas with excess temperature, the power is reduced, but otherwise the operation continues. This has the advantage on, that despite protection against overtemperature, the operation of the electrical appliance is only minimally affected.

For a power reduction is advantageous either at the point with the highest temperature that of the responsible heater reduced. Alternatively, generally, the heater operating at the highest power setting can be reduced. A power reduction can be adjusted either to the next low power setting or to an average power generation of all powered heaters.

As an alternative to such an adapted power reduction, all operated heaters can be reduced by the same amount in the event of an excess temperature. If power generation for the heaters takes place via electromechanically operating actuators, so-called energy regulators, whose power setting can actually only be changed manually, the control system performs a central shutdown. This can be done, for example, at the phase at which the overheated heaters are connected.

When detecting the temperature in the environment of the electrical device not only instantaneous actual values can be detected. From a record of a temperature increase can be determined based on known data of the electrical device for the respective operating state, as the temperature will rise further. There can be a predictive power reduction on a critically affected heater, so that although relatively early intervention in the operation, but this is relatively low. However, a later possibly complete shutdown can be prevented.

Since the installation situations for certain electrical appliances can vary greatly, it is also possible, for example, in a controller or an associated memory many different, so-called setups store. These may differ on the one hand with regard to the two mentioned limit temperatures in adaptation to different configurations of the built-in furniture. Likewise, different national safety regulations can be taken into account or even different installation situations, such as a hob with untergebautem oven or without, different materials of the built-in furniture or a worktop in hobs.

These and other features will become apparent from the claims but also from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.

Brief description of the drawings

Fig. 1

eine Schnittansicht einer Anordnung eines Kochfeldes in einer Arbeitsplatte mit Unterschränken und einer Temperaturüberwachung,

Fig. 2

eine Draufsicht auf die Anordnung aus Fig. 1,

Fig. 3

zwei verschiedene Anordnungen von Halterungen für Temperatursensoren nach Art von beweglichen Armen,

Fig. 4

eine alternative Anbringung eines Temperatursensors an einem Teleskoparm als Halterung,

Fig. 5

eine Anordnung eines Temperatursensors als IR-Sensor im Kochfeld mit einer an einem Unterschrank angeordneten speziellen temperatursensitiven Oberfläche, auf die der IR-Sensor gerichtet ist und

Fig. 6

die Anordnung mehrerer Temperatursensoren an einem Backofengehäuse für einen Einbaubackofen.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings shows:

Fig. 1

a sectional view of an arrangement of a hob in a worktop with base cabinets and a temperature monitoring,

Fig. 2

a plan view of the arrangement Fig. 1 .

Fig. 3

two different arrangements of holders for temperature sensors in the manner of movable arms,

Fig. 4

an alternative attachment of a temperature sensor to a telescopic arm as a holder,

Fig. 5

an arrangement of a temperature sensor as an IR sensor in the hob with a arranged on a cabinet special temperature-sensitive surface to which the IR sensor is addressed and

Fig. 6

the arrangement of several temperature sensors on an oven housing for a built-in oven.

Detailed description of the embodiments

In Fig. 1 and Fig. 2 an arrangement 11 of a hob 12 in a worktop 20 is shown. The hob 12 has according to a conventional structure on a cooking surface 13, for example made of glass ceramic, which sits on a housing 14, for example made of sheet metal. The housing 14 contains four radiant heaters 15a-d. These form the heating devices of the hob 12. Each radiant heater 15a-d is provided with its own so-called bar regulator 17a-d, as known from the prior art. These rod regulators 17 are used to avoid too high temperatures on the hob surface 13 by the radiant heater 15, which are in the range of 600 ° to 700 ° C. If this temperature is exceeded, the rod regulators 17 switch off the power supply to the radiant heater 15 until the temperature has fallen below the critical value again. The housing 14 of the hob 12 still contains a controller 18. This serves to operate the hob 12 and not shown but known controls for adjusting the power of the various radiant heater 15. Furthermore, the controller 15 is used to evaluate the signals of the temperature sensors which is described below.

The worktop 20, which contains the hob 12 in a section, can either wood, pressboard or other materials such as stone or the like. consist. Under the worktop 20 are located on the left and right of the hob 12 base cabinets 21 a and 21 b. such Unterschränkte 21 are made according to a conventional structure of wood or pressboard and coated with plastic or painted. Under the hob 12 and the housing 14 extends slightly spaced therefrom a drawer 22. Under the drawer 22, either more base units can be attached or an oven, as in Fig. 6 is shown and will be explained later with respect to it. Alternatively, such an oven may also be provided in place of the drawer 22 below the hob 12.

The assembly 11 includes a number of external temperature sensors 24a-d. The temperature sensor 24a is attached to a protruding from the housing 14 holder 25a and is a piece or a few inches away from the housing 14. From the top view Fig. 2 It can be seen that this, since the controller 18 is provided in the front region of the hob 12, in the rear left corner of the hob. Further, the temperature sensor 24a protrudes downwardly so that it can monitor an area corresponding to the entire corresponding corner area of the cooktop 12. In particular, it monitors the temperature in this area towards the left lower cabinet 21 a and to this area of the drawer 22.

The external temperature sensor 24 b is arranged centrally on the underside of the housing 14. It can either be arranged directly on the underside of the housing, for example screwed or pierced from the inside out. Alternatively, a holder may also be provided here corresponding to the holder 25a of the temperature sensor 24a, so that the temperature sensor 24b has a certain distance from the housing 14 or is closer to the drawer 22.

The right external temperature sensor 24c is attached to the outside of the right lower cabinet 21 b in the rear area, in particular screwed or glued. He has no holder on the hob 12th or the housing 14. There is only the signal transmitting cable connection 26c to the hob available.

In the plan view is still another external temperature sensor 24d can be seen, which also without support or the like. is attached directly to the outside of the right base cabinet 21 b. Instead of a cable here is the signal transmission according to the transponder principle or RFID. The transponder device 30 is provided on the temperature sensor 24d with the signal-transmitting connection to a transponder station 31 in the housing 14 of the hob 12, which may also be provided on the outside thereof. By a known from the prior art from other uses transponder signal transmission, a corresponding power supply to the external temperature sensor 24d omitted and at the same time laborious and error-prone laying of cables can be saved.

In addition, the cooktop 12 also contains an internal temperature sensor 27, which is likewise connected in a signal-transmitting manner to the controller 18, like the other temperature sensors. It is used for the above-described driving method of the hob for determining the temperature inside the hob, in order to be able to determine the temperature conditions at certain points or around the cooktop 12 based on the temperature data from external temperature sensors.

In addition, the hob 12 still contains an internal thermal fuse 28. This is intended to switch off at high temperature inside the hob individual heaters or even the entire hob. Such an internal thermal fuse can be a so-called Klixon, with the advantage that it always secures against overtemperature regardless of a function of the controller 18.

In Fig. 3 Two alternatives are shown how a holder 25 for an external temperature sensor 24 may be formed. On the left is an articulated holding arm 25, which is supported by a spring against the housing 14. He presses the temperature sensor 24 as far as possible to the outside, in particular to the stop on an outer side of a cabinet 21. The connection cable 26 from the temperature sensor 24 for control can hereby be attached to the support arm 25, for example, wrapped by cable ties or the like .. A simplified design of Retaining arms 25 is in Fig. 3 shown on the right. Instead of a two-part articulated arrangement here is the holder arm 25 integrally formed of a resilient material, such as spring steel. This is pre-bent so that in the relaxed state, the projecting portion with the temperature sensor 24 at the end relatively far from the housing 14 projects, for example, almost at right angles.

To insert the hob 12 in the worktop 20 according to Fig. 1 the holder 25 can be pressed in both cases against the housing 14, either manually or for example by fuses or holding means. After insertion, these can be deactivated, so that the holding arms 25 push the temperature sensors 24 as far away from the housing 14 as possible or move as far as possible to a lower cabinet outside.

Yet another embodiment of a holder is Fig. 4 refer to. There, the holder 25 is formed with the temperature sensor 24 at the end as a telescopic rod. Similar to Fig. 3 Described to the ausfedernden brackets, also here the telescopic support arm 25 can be extended after the onset of the hob to a certain distance or to rest on the outside of a cabinet. For this purpose, in the telescopic holder 25, a spring or the like. be included.

Fig. 5 describes a further development of a temperature sensor. In this case, an IR temperature sensor 24 'is provided on the housing 14. It can either be arranged on the inside of the housing 14 and act through a corresponding opening to the outside. Alternatively, it may be attached from the outside to the housing 14.

Opposite of the IR temperature sensor 24 'is provided on an outer side of a lower cabinet 21, a specially provided temperature-sensitive surface 33 with good IR radiation behavior, such as a flexible adhesive film, paint application, thin plate or the like, which is glued to the base cabinet. The IR sensor 24 'is aligned with this sensitive surface 33 and although it is arranged in or on the housing 14, make a temperature measurement at some distance, namely on the outside of the base cabinet 21. This has the advantage that arrangement of Temperature sensors on the hob and its installation in a worktop can easily take place, since no protruding temperature sensors must be observed. At the same time, the temperature measurement can take place not only at some distance from the hob 12, but at the point where you actually want to measure or avoid over-temperature. If the temperature-sensitive surface 33 has a certain extent and is provided, for example, on a material having good thermal conductivity, such as aluminum, in spite of its small thickness, a temperature or area-integrating temperature detection for a larger area can also take place. This also corresponds exactly to what is to be detected by the temperature sensors, namely a possibly critically high temperature in the vicinity of the hob or on surfaces adjacent lower cabinets or built-in furniture. In a further embodiment of the invention can be provided that an IR temperature sensor 24 'is variable in its orientation for adaptation to different mounting locations of the temperature-sensitive surface 33. Thus, a vote on individual installation situations of the hob in a worktop with base cabinets and drawers or the like. be made.

In Fig. 6 For further illustration of the principle of the invention, a baking oven 112 is shown with a housing which is cuboid in contrast to the rather flat housing 14 of the hob 12 according to FIG Fig. 1 , The oven 112 is to be installed in a cabinet wall or under a worktop so that its door 116 substantially terminates with a front panel, for example, adjacent cabinet walls. Otherwise, around the oven 112 there are temperature-sensitive surfaces or objects, such as the aforementioned base cabinets or drawers, which in turn are to be protected against excess temperature. In this respect, an external temperature sensor 124a including holder 125a are provided on the left front surface, an external temperature sensor 124b on a corresponding holder 125b on the right upper rear corner and an external temperature sensor 124c with holder 125c on the lower right rear corner. Of course, these temperature sensors could also be designed or attached according to the Fig. 1 to 5 , This is merely intended to illustrate that due to the deviation from the flat shape and the installation situation with possible heat release upwards, a temperature monitoring should be carried out above all. The three temperature sensors 124a-c thus monitor the temperature around the oven 112 and toward adjacent temperature-sensitive surfaces, respectively, according to the described method.

Function and control method

For this purpose, on the one hand, reference is essentially made to the previously stated. By the external temperature sensors 24, the controller 18 can recognize and respond to a directly at specially selected locations with expected high temperature, if here the temperature is dangerously high. Here are above all the aforementioned to observe two temperature limits of the first limit temperature between 80 ° and 100 ° C and the second limit temperature between 150 ° and 190 ° C. Furthermore, in addition to the direct monitoring of the exceeding of a limit temperature at the points or locations of the corner temperature sensors from their values in connection with empirical values in a memory of the controller 18, in particular taking into account the respective operating mode, duration and performance of the radiant heater 15, a temperature distribution around the entire hob or the oven around at least approximately be determined. On the basis of this calculation, a reduction of the heating power at one of the radiant heaters 15 can take place not only on the basis of temperatures actually measured by the temperature sensors 24, but on the basis of theoretical values. This has the advantage that the number of temperature sensors to be used can be kept lower, so that the construction, control and evaluation effort remains limited. Thus, it is possible, as described above, by using new materials for the hob surface 13, the heating power to the radiant heaters 15 and thus to increase the temperature generated, without affecting the built-in furniture or lower cabinets or the like. damage occurs around the electrical appliance.

Claims (21)

1. An arrangement of an electric appliance (12, 112), in particular of a cooktop (12) in a built-in furniture, preferably in a countertop (20) having floor cupboards (21), wherein the electric appliance includes at least one heating device (15a, 15b, 15c, 15d) and a heated surface (13) or a heated room, wherein at least two temperature sensors (24a-d, 27, 124a-c) are provided and disposed on different regions of the electric appliance in the vicinity of the built-in furniture or towards the built-in furniture for detecting the environmental temperature of the electric appliance and the heat emitted into the built-in furniture, respectively, characterized in that at least two temperature sensors (24a-d, 124a-c) are disposed exterior to the electric appliance (12, 112).
2. The arrangement according to claim 1, characterized in that multiple temperature sensors (24a-d, 124a-c) are disposed on the exterior of the electric appliance (12, 112), in particular all temperature sensors, preferably directly on an exterior wall (14).
3. The arrangement according to claim 1 or 2, characterized in that at least one temperature sensor (24a, c, d; 124a-c) is disposed at a distance from the electric appliance (12, 112).
4. The arrangement according to claim 3, characterized in that at least one temperature sensor (24a; 124a-c) is disposed on the electric appliance (12, 112) by means of a bracket (25a, 125a-c) and at a distance from the electric appliance, preferably by means of a bracket (25a) adjusting the distance of the temperature sensor to the electric appliance, in particular by means of a pivot arm or a telescopic arm.
5. The arrangement according to claim 3, characterized in that at least one temperature sensor (24c, d) is disposed directly on the built-in furniture (21) at a certain distance to the electric appliance (12), preferably on a wall of the built-in furniture, and connected to the electric appliance in a signal transmitting manner, in particular via a cable (26).
6. The arrangement according to any of the preceding claims, characterized in that in the vicinity of at least one, preferably two corners of the electric appliance (12, 112) a temperature sensor (24a, 24c; 124b, 124c) is provided or disposed at a distance from the electric appliance, wherein temperature sensors are provided preferably exclusively at corners or in the vicinity of corners of the electric appliance.
7. The arrangement according to any of the preceding claims, characterized in that centrally below the electric appliance (12) a temperature sensor (24b) is provided initiating from the central region thereof, preferably at some interval to the electric appliance.
8. The arrangement according to any of the preceding claims, characterized in that at least one temperature sensor is operating mechanically, in particular thermo-mechanically and via different relative expansions of various sensor parts, respectively.
9. The arrangement according to any of claims 1 to 7, characterized in that at least one temperature sensor (24a-d, 124a-c) is an electric or electronic temperature sensor, in particular a resistance temperature sensor.
10. The arrangement according to any of claims 1 to 7, characterized in that at least one temperature sensor (24') is arranged for determination of the temperature based on thermal radiation, in particular an infrared (IR) sensor, preferably aimed at a certain location on the built-in furniture (21), and in particular said location has a specific surface (33) to improve temperature detection for IR sensors (24').
11. The arrangement according to any of the preceding claims, characterized in that the electric appliance is an electric cooktop (12), in particular including radiation heating devices (15) below a cooktop plate (13).
12. The arrangement according to any of the preceding claims, characterized by a further temperature detection device (27, 28) inside the electric appliance (12) for monitoring a maximum admissible internal limit temperature of the electric appliance, wherein preferably said temperature detection device (28) is mechanically operating or acting, and directly cuts in particular a power supply to the electric appliance (12) or a heating device (15) upon exceeding the predetermined internal limit temperature.
13. A method for controlling an electric appliance (12, 112) in an arrangement according to any of the preceding claims, characterized in that a temperature present in the built-in furniture (21) or on surfaces of the built-in furniture is detected by the temperature sensors (24a-d, 27, 124a-c), and in an operating state of the electric appliance during appropriate use below a first limit temperature the operation thereof is maintained undisturbed, preferably with particularly high power at the heating devices (15) of the electric appliance, wherein an exceeding of the first limit temperature is detected by the temperature sensors with an option of power reducing at one heating device of the electric appliance by means of a control and upon exceeding of a second limit temperature the power of at least of one of the heating devices is mandatorily reduced.
14. The method according to claim 13, characterized in that the first limit temperature is 80 to 110 °C, preferably ca. 90 °C.
15. The method according to claim 13 or 14, characterized in that the second limit temperature is 150 to 190 °C, preferably ca. 170 °C.
16. The method according to any of claims 13 to 15, characterized in that the control (18) in the electric appliance (12) obtains the temperature conditions around the electric appliance and the built-in furniture (21), respectively, from temperature information of multiple temperature sensors (24a-d) disposed on or exterior to the electric appliance, in particular by reference to data from a stored database, and checks for an exceeding of any of the limit temperatures.
17. The method according to claim 16, characterized in that the control (18) in the operating state detects the level of a power generation of each heating device (15) and considers said level in determining of temperature conditions, wherein preferably the control (18) performs a temperature detection dependent on a position exterior to the electric appliance (12), wherein at multiple locations predetermined by the temperature sensors (24a-d, 24') the temperature present there is detected and processed in the control, and wherein a power reduction at the heating devices (15) is performed by the control such that merely at locations exceeding the first and the second limit temperature, respectively, the temperature is decreased.
18. The method according to any of claims 13 to 17, characterized in that the control (18) upon need for a reduction of the power of a heating device (15), in case of multiple heating devices operating, at first and mainly the power of the heating device operated at the highest power setting is reduced, preferably down to at least the level of the heating device operated at the second highest power setting, in particular to an average value of the power generation of all operated heating devices.
19. The method according to any of claims 13 to 17, characterized in that upon need for a power reduction the control (18) decreases the power of all the heating devices (15) operated at said time by the same amount.
20. The method according to any of claims 13 to 19, characterized in that a temperature increase or the increase rate of the temperature on or in the built-in furniture (21) is detected and a certain time period is precalculated by the control (18) in advance, wherein in response thereto a power reduction is effected with at least one of the heating devices (15).
21. The method according to any of claims 13 to 20, characterized in that various setups of various first and second limit temperatures are stored in the control (18) or an associated memory and may be selected for operating the electric appliance (12) in the arrangement, wherein preferably during the first operation of the electric appliance an interrogation and necessary inputs by an operator are started.

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