EP4183232A1

EP4183232A1 - Hob device

Info

Publication number: EP4183232A1
Application number: EP21742805.1A
Authority: EP
Inventors: Alejandro DEL CUETO BELCHI; Jorge Felices Betran; Manuel Fernandez Martinez; Jose Miguel Gil Narvion; Pablo Jesus Hernandez Blasco; Eduardo Imaz Martinez; Paul Muresan; Jose Manuel Palacios Gasos; Alberto Perez Bosque; Pilar Perez Cabeza; Diego Puyal Puente; Javier SERRANO TRULLEN
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2020-07-17
Filing date: 2021-07-07
Publication date: 2023-05-24
Also published as: WO2022013034A1; US20230225019A1

Abstract

The invention relates to a hob device (10a; 10b; 10c), in particular an induction hob device, comprising a sensor unit (14a; 14b; 14c) for detecting a sensor signal and comprising an electronic signal processing unit (16a; 16b; 16c) for further processing and/or analyzing the sensor signal. In order to provide a device of the generic type with improved properties with respect to efficiency, the invention proposes that the hob device (10a; 10b; 10c) has a printed circuit board (18a; 18b; 18c), on which the sensor unit (14a; 14b; 14c) and the signal processing unit (16a; 16b; 16c) are arranged together.

Description

hob device

The invention relates to a hob device according to the preamble of claim 1.

Hobs with sensors, which are provided, for example, for detecting cookware or a temperature, are already known from the prior art. In some known configurations, a sensor is arranged on a circuit board. A signal detected by the sensor is forwarded from the circuit board by means of electrical contacts, for example via a circuit board plug, to a unit arranged outside the circuit board, for example a microprocessor, and then further processed and evaluated there.

The object of the invention is in particular, but not limited to, is to provide a generic device with improved properties in terms of effi ciency. The object is achieved by the features of claim 1, while advantageous refinements and developments of the inventions can be found in the subclaims.

The invention is based on a hob device, in particular an induction hob device, in particular with a heating unit, with a sensor unit, in particular designed separately from the heating unit, for detecting a sensor signal and with an electronic signal processing unit for further processing and/or evaluating the sensor signal.

It is proposed that the hob device has a printed circuit board on which the sensor unit and the signal processing unit are arranged together.

Such a configuration can advantageously provide a hob device with improved properties in terms of efficiency. By arranging the sensor unit and signal processing unit together on the printed circuit board, the sensor signal can advantageously be directly further processed and/or evaluated, which means that a simpler and more cost-intensive circuit board connector with a large number of electrical contacts, which would otherwise be required for forwarding the sensor signal, is replaced by a more cost-intensive one Plug, for example a plug of type Dbus2, can be replaced. As a result, cost efficiency can advantageously be improved and a particularly inexpensive hob device can thus be provided. Furthermore, efficiency with regard to further units of the hob device and/or a hob having the hob device can advantageously be increased. For example, a microprocessor of a control unit can be relieved of the task of controlling the heating unit by further processing and/or evaluating the sensor signal directly in the signal processing unit, which means that a microprocessor with lower power requirements can be used and thus further improved cost efficiency can be achieved. Furthermore, flexibility can advantageously be increased by arranging further sensor units together with further signal processing units on further printed circuit boards. Thus, a modular structure can be simplified, flexibility with regard to an arrangement of the sensor units, for example with regard to different geometries of hobs, increased and operation of the sensor unit independent of the heating unit is made possible.

A “cooktop device”, in particular an “induction cooktop device”, should be understood to mean at least a part, in particular a subassembly, of a cooktop, in particular an induction cooktop. The hob device could, for example, have at least one support plate, in particular at least one hob plate, which could be provided, for example, for setting up cookware, in particular for the purpose of heating the cookware. The hob device, in particular the induction hob device, can also include the entire hob, in particular the entire induction hob. The hob device is preferably designed as an induction hob device. Alternatively, however, it would also be conceivable for the hob device to be part of another type of hob, for example a glass ceramic hob or the like.

A “heating unit” is to be understood as meaning a unit which has at least one heating element which, in at least one operating state, provides energy to at least one object, for example a cooking utensil. The heating element of the Heizein unit could be designed, for example, as a radiant heater heating element for a glass ceramic cooktop and provide energy in the form of thermal radiation to the object in the operating state. Preferably the heating unit is an induction heating formed unit and has at least one heating element, which is designed as an induction heating element. The heating element designed as an induction heating element is intended to provide energy to the object in the operating state in the form of an alternating electromagnetic field, advantageously for the purpose of inductive energy transmission. The heating unit advantageously has at least two, particularly advantageously at least four, preferably at least eight and particularly preferably a large number of heating elements. The heating elements of the heating unit can be distributed, for example distributed in a matrix manner.

A “sensor unit” should be understood to mean a unit which has at least one sensor element for detecting the sensor signal, at least one electrical input for activation and at least one signal output for outputting the sensor signal to the signal processing unit. The sensor element and/or further sensor elements of the sensor unit could, for example, be a capacitive sensor and/or a resistive sensor, for example a resistance thermometer (Resistance Temperature Detector, RTD) and/or a temperature-dependent resistor (NTC thermistor). and/or as an ultrasonic sensor and/or as a piezoelectric sensor and/or as a mechanical sensor. The at least one sensor element is preferably designed as an inductive sensor and comprises at least one induction coil. The sensor signal is preferably an electrical signal which, in the form of an electrical voltage and/or an electrical current, in particular in the form of an electrical alternating voltage and/or an electrical alternating current, is present at the signal input and/or at the signal output of the Sensor unit is applied and / or falls and / or flows. The sensor unit can have a large number of sensor elements, which are each provided for detecting at least one sensor signal. The sensor unit advantageously has a number of sensor elements, which corresponds to at least one number of heating elements of the heating unit. The sensor unit preferably has a greater number of sensor elements than the number of heating elements in the heating unit. The sensor signal is preferably provided for determining an operating state variable when the hob device is in an operating state. The operating state variable could be, without being limited to this, for example a temperature of a hob plate and/or the presence and/or degree of coverage of one or more heating elements of the heating unit and/or a shape and/or a size and/or an electrical and/or electromagnetic parameter, for example an electrical resistance and/or an inductance, of an object, in particular a cooking utensil, to which the heating unit provides energy in the operating state.

A “signal processing unit” is to be understood as an electronic unit which, for the further processing and/or evaluation of the sensor signal, comprises at least one electronic semiconductor component, preferably at least one semiconductor chip designed as a microcontroller (pController, pC, MCU). The further processing carried out by the signal processing unit in an operating state of the hob device goes beyond simply forwarding the sensor signal to another unit and includes at least converting the sensor signal from an analog signal form into a digital signal form. The evaluation of the sensor signal preferably includes the determination of the operating state variable. The signal processing unit can have at least one serial interface which is provided in digital signal form for forwarding the sensor signal, in particular for subsequent evaluation of the sensor signal, to further units, for example a control unit.

“Provided” is to be understood to mean specially programmed, designed and/or equipped. The fact that an object is provided for a specific function should be understood to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state.

In addition, it is proposed that the circuit board has at least one bending area. In this way, an arrangement of the printed circuit board can advantageously be improved. A particularly compact and/or space-saving arrangement of the printed circuit board can advantageously be made possible. A “flexible area” should be understood to mean a sub-area which is bendable and/or bent. Depending on the design of the printed circuit board, the bending area can be bent a number of times and then permanently bent, for example for assembly, or alternatively it can also be permanently bent.

The circuit board could be designed as a rigid circuit board. In an advantageous embodiment, however, it is proposed that the printed circuit board be designed to be flexible, at least in sections. Such a configuration can advantageously Order of the circuit board is particularly well adapted to special geometries of cooktops and thus an assembly process can be improved. In addition, the bending area can advantageously be realized with simple technical means. The fact that the printed circuit board “is designed to be flexible at least in sections” is to be understood to mean that the printed circuit board has at least one flexible section and/or partial area, in particular at least the bending area, which is flexible at least at times without experiencing any structural damage. The flexible partial section and/or flexible partial area of the partially flexible printed circuit board preferably has a modulus of elasticity of at least 3.0 GPa, particularly preferably of at least 4.5 GPa.

In addition, it is proposed that the circuit board be designed as a rigid-flex circuit board. As a result, a permanently bendable bending area can advantageously be provided and dismantling, for example for maintenance purposes of the hob device, can be simplified. The circuit board designed as a rigid-flex circuit board could, for example, be made from a combination of flexible sub-layers, such as polyimide foils, and rigid sub-layers, such as layers made of a composite material made of epoxy resin and glass fibers, by pressing and various areas produced, for example, by means of deep milling with under different thickness and flexibility.

In an alternative advantageous embodiment, it is proposed that the printed circuit board be designed as a semi-flexible printed circuit board. As a result, a cost saving can advantageously be achieved and a particularly inexpensive hob device can thus be provided. The printed circuit board designed as a semi-flexible printed circuit board could be formed, for example, from a stack of layers, from several so-called prepregs, which has at least one partial area tapered to a few layers, for example by milling or by using prepunched prepregs. The tapered sub-area could be provided with a permanently flexible lacquer layer and in particular form at least the bending area of the printed circuit board.

Furthermore, it is proposed that a signal processing area of the printed circuit board is separated from a sensor area of the printed circuit board by the bending area. Such a configuration can advantageously achieve a particularly expedient joint arrangement of the sensor unit and the signal processing unit on the printed circuit board. A “signal processing area” is a sub-area of the conductor be understood as a plate on which all the electronic components of the signal processing unit are arranged. A “sensor area” should be understood to mean a part area of the printed circuit board on which all the components of the sensor unit are arranged.

In addition, it is proposed that the sensor area and the signal processing area are aligned at an angle, in particular at least essentially perpendicularly, to one another in a mounted state. As a result, an arrangement of the signal processing area can advantageously be improved and effective protection of the signal processing unit from thermal influences can be made possible. In the installed state, the sensor area and the signal processing area are preferably aligned at an angle to one another in such a way that the signal processing area is arranged in an edge area of the hob device and/or of a hob having the hob device. If the signal processing area is arranged in the edge area, effective protection of electronic components of the signal processing unit against thermal influences and thus against damage due to excessively high temperatures can advantageously be achieved.

In an alternative advantageous embodiment, it is proposed that the sensor area and the signal processing area are aligned at least substantially parallel to one another in a mounted state. As a result, a further embodiment with an advantageous arrangement for effective protection of the signal processing area from thermal influences can be provided. The sensor area and the signal processing area are preferably aligned parallel to one another in the assembled state such that the signal processing area is arranged in a lower area of the hob device and/or of a hob having the hob device. If the signal processing area is arranged in the lower area, effective protection of electronic components of the signal processing unit against thermal influences and thus against damage due to excessively high temperatures can advantageously be achieved.

In addition, it is proposed that the hob device has a shielding element, with the sensor area and the signal processing area being arranged on different sides of the shielding element in an assembled state. Here by an advantageous arrangement of the sensor unit and the signal processing unit to be improved. In addition to protection against thermal influences, the electronic components of the signal processing unit arranged in the signal processing area can advantageously also be protected against electromagnetic influences, and particularly reliable operation of the signal processing unit can thus be achieved. A “shielding element” is to be understood here as an element which serves to shield, in particular electrical and/or electronic, components of the hob device which are arranged outside the shielding element, in particular underneath the heating unit of the hob device and/or the hob which has the hob device and/or the hob having the hob device, for example a control unit, with respect to electromagnetic fields which are generated by at least the heating unit, in particular by at least one induction heating element of the heating unit, the hob device and/or the hob having the hob device.

In the installed state, the bending area could be arranged bent on an outer edge of the shielding element in such a way that the sensor area and the signal processing area are arranged on different sides of the shielding element. In an advantageous embodiment, however, it is proposed that the shielding element has a feedthrough, through which the bending area is passed in the mounted state. With such a configuration, particularly versatile arrangements of the printed circuit board can advantageously be made possible. In addition, effective protection of the signal processing unit against thermal and/or electromagnetic influences is also advantageously made possible when the printed circuit board is arranged in a central area below a hob plate of the hob device and/or a hob having the hob device, in that the shielding element has a passage in has a central area through which the bending area is passed in the assembled state.

In addition, it is proposed that the signal processing area is at least essentially rigid. As a result, an arrangement of electronic components of the signal processing unit in the signal processing area can advantageously be improved and a manufacturing and/or assembly process of the signal processing unit can be optimized. Furthermore, it is proposed that the sensor area is at least essentially rigid. An arrangement of components of the sensor unit in and a manufacturing and/or assembly process of the sensor unit can advantageously be optimized by such a configuration.

Furthermore, it is proposed that the hob device has at least one protective element arranged above the signal processing unit to protect the signal processing unit from thermal influences. A particularly compact design of the hob device can advantageously be made possible by such an embodiment. The protective element advantageously enables the signal processing unit to be placed in the vicinity of a hob plate of the hob device and/or a hob having the hob device, with the signal processing unit, in particular temperature-sensitive electronic components of the signal processing unit, being effectively protected from thermal influences. Thermal influences can be caused, without being limited thereto, for example by thermal conduction and/or convection and/or thermal radiation of the heating unit and/or a cooking utensil or the like placed above the heating unit. The protective element could be formed, for example, without being limited thereto, from a thin, in particular transparent, layer of glass fiber or a silicate aerogel.

In addition, it is proposed that the hob device have a further sensor unit for detecting at least one further sensor signal, a further signal processing unit for further processing and/or evaluation of the further sensor signal and a further printed circuit board on which the further sensor unit and the further signal processing unit are arranged together. having. As a result, a range of functions of the hob device can advantageously be increased. The hob device can have a multiplicity of further printed circuit boards, on each of which a further sensor unit and a further signal processing unit are jointly arranged. The further sensor unit and/or the further signal processing unit and/or the further printed circuit board can each have one or more features according to one of the configurations described above with regard to the sensor unit and/or signal processing unit and/or the printed circuit board. It is conceivable that the sensor signal and the further sensor signal can be used to determine different operating state variables are provided. For example, the sensor signal could be provided for determining the presence and/or degree of coverage of a cooking utensil set up above the heating unit and the further sensor signal for determining a temperature. It is also conceivable that the sensor unit and the further sensor unit, the signal processing unit and the further signal processing unit and the printed circuit board and the further printed circuit board are of essentially identical design to one another. For example, the printed circuit board on which the sensor unit and the signal processing unit are arranged together could be arranged above a first heating element of the heating unit and provided for determining an operating state variable relating to the first heating element, and the further printed circuit board on which the further sensor unit and the further Signal processing unit are arranged together, arranged above a second heating element of the heating unit and provided for determining an operating state variable relating to the second heating element.

The invention also relates to a hob, in particular an induction hob, with a hob device according to one of the previously proposed configurations. Such a hob is characterized by its advantageous properties in terms of efficiency.

The hob device should not be limited to the application and embodiment described above. In particular, the hob device can have a number of individual elements, components and units that differs from the number of individual elements, components and units specified here in order to fulfill a function described herein.

Further advantages result from the following description of the drawings. In the drawing, exemplary embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 shows a hob with a hob device in a schematic top view, Fig. 2 shows the hob device with a sensor unit and a signal processing unit in a schematic exploded view,

3 shows a schematic plan view of a hob device in a further exemplary embodiment,

4 shows a schematic sectional view of the hob device of the exemplary embodiment in FIG. 3,

5 shows a further exemplary embodiment of a hob device in a schematic plan view and

6 shows a schematic sectional view of the hob device of the exemplary embodiment in FIG.

FIG. 1 shows a hob 42a in a schematic plan view. The hob 42a is designed as an induction hob. The hob 42a has a hob device 10a. The hob device 10a is designed as an induction hob device. The hob includes a control unit 20a. The operating unit 20a is provided for a user to control the hob 42a.

The hob device 10a comprises a heating unit 12a with a plurality of heating elements 32a and further heating elements 50a, which are each designed as inductors.

Of the objects that are present several times, only one is provided with a reference number in each of the figures.

The hob device 10a includes a sensor unit 14a. The sensor unit 14a is provided for detecting a sensor signal (not shown).

Figure 2 shows the hob device 10a in a schematic exploded view. The hob device 10a includes a signal processing unit 16a. The signal processing unit 16a is provided for further processing and/or evaluation of the sensor signal. When the hob device 10a is in an operating state, the signal processing unit 16a uses the sensor signal to determine the presence and/or degree of coverage of a cooking utensil (not shown) placed on a hob plate 44a of the hob 42a. The hob device 10a has a printed circuit board 18a. The sensor unit 14a and the signal processing unit 16a are arranged together on the circuit board 18a.

In an assembled state of the hob device 10a, the printed circuit board 18a is arranged above the heating unit 12a. In the assembled state, the printed circuit board 18a is arranged below the hob plate 44a of the hob 42a.

The circuit board 18a has a bending area 22a. The circuit board 18a has a sensor area 24a. The sensor unit 14a is arranged in the sensor area 24a on the printed circuit board 18a. The circuit board 18a has a signal processing area 26a. The signal processing unit 16a is arranged in the signal processing area 26a on the circuit board 18a. The signal processing area 26a of the printed circuit board 18a is separated from the sensor area 24a of the printed circuit board 18a by the bending area 22a.

The printed circuit board 18a is designed to be flexible, at least in sections. In the present exemplary embodiment, the bending area 22a of the printed circuit board 18a is designed to be flexible.

The sensor area 24a of the printed circuit board 18a is at least essentially rigid. The signal processing area 26a of the printed circuit board 18a is at least essentially rigid.

The hob device 10a has a protective element 46a. The protective element 46a is provided to protect the signal processing unit 16a from thermal influences. The protective element 46a is placed on an underside 48a of the hob plate 44a. The protective element 46a is formed as a thin transparent layer of silicate aerogel. In the assembled state, the protective element 46a extends over the signal processing area 26a. In the operating state of the hob device 10a, the protective element protects the signal processing unit 16a from thermal influences, namely from temperature influences on the hob plate 44a.

Two further exemplary embodiments of the invention are shown in FIGS. The following descriptions are essentially limited to the differences between the exemplary embodiments, with reference being made to the description of the exemplary embodiment in FIGS. 1 to 2 with regard to components, features and functions that remain the same. To distinguish between the exemplary embodiments, the letter a in the reference numbers of the exemplary embodiment in FIGS. 1 to 2 has been replaced by the letters b and c in the reference numbers of the exemplary embodiments in FIGS. puts. With regard to components with the same designation, in particular with regard to components with the same reference symbols, reference can in principle also be made to the drawings and/or the description of the exemplary embodiment in FIGS.

FIG. 3 shows a hob device 10b in a schematic plan view. The hob device 10b is part of a hob 42b designed as an induction hob and designed as an induction hob device. The hob device 10b includes a heating unit 12b with a plurality of heating elements 32b and with a plurality of further heating elements 50b. The heating element 32b and the further heating elements 50b are each designed as inductors.

The hob device 10b comprises a sensor unit 14b for detecting a sensor signal (not shown) and a signal processing unit 16b for further processing and/or evaluating the sensor signal. When the hob device 10b is in an operating state, the signal processing unit 16b uses the sensor signal to determine the presence and/or degree of coverage of a cooking utensil (not shown) placed above the heating element 32b of the heating unit 12b.

The hob device 10b includes a printed circuit board 18b. The sensor unit 14b and the signal processing unit 16b are arranged together on the printed circuit board 18b. The printed circuit board 18b includes a bending area 22b. The printed circuit board 18b is flexible, at least in sections. The printed circuit board 18b is designed as a semi-flexible printed circuit board 30b. The semi-flexible printed circuit board 30b can be bent a few times for assembly. The bending area 22b is produced during assembly. In an assembled state of the hob device 10b, the bending area 22b is bent (cf. FIG. 4).

A signal processing area 26b of the circuit board 18b, on which the signal processing unit 16b is arranged, is separated by the bending area 22b from a sensor area 24b of the circuit board 18b, on which the sensor unit 14b is arranged.

The hob device 10b has several additional sensor units 52b. The hob device 10b has a number of further signal processing units 54b. The hob device 10b has a number of further printed circuit boards 56b. The other sensor units 52b, the other signal processing units 54b and the other printed circuit boards 56b are each configured essentially identical to one another, which is why the following description is limited to a further sensor unit 52b, a further signal processing unit 54b and a further printed circuit board 56b.

The additional sensor unit 52b is provided for detecting an additional sensor signal (not shown). The further signal processing unit 54b is provided for further processing and/or evaluation of the further sensor signal. The additional sensor unit 52b and the additional signal processing unit 54b are arranged together on the additional printed circuit board 56b.

In the operating state of the hob device 10b, the additional signal processing unit 54b uses the additional sensor signal to determine the presence and/or degree of coverage of additional cooking utensil (not shown) placed above the additional heating element 50b of the heating unit 12b.

The further printed circuit board 56b has a further bending area 58b. A further signal processing area 62b of the further printed circuit board 56b, on which the further signal processing unit 54b is arranged, is separated by the further bending area 58b from a further sensor area 60b of the further printed circuit board 58b, on which the further sensor unit 52b is arranged.

The additional printed circuit board 56b is designed to be flexible, at least in sections. The wide re circuit board 56b is designed as a semi-flexible circuit board 30b. The further printed circuit board 56b designed as a semiflexible printed circuit board 30b can be bent a few times for assembly. The additional bending area 58b is produced during assembly.

Figure 4 shows a schematic sectional view of the hob device 10b. The hob device 10b has a shielding element 34b. The shielding element 34b is provided for shielding against electromagnetic radiation which is emitted by the heating element 32b and/or the further heating element 50b in the operating state.

In an assembled state of the hob device 10b, the sensor area 24b and the signal processing area 26b are arranged on different sides 36b, 38b of the shielding element 34b. In the mounted state, the sensor area 24b is arranged on an upper side 36b of the shielding element. In the assembled On the other hand, the signal processing area 26b is arranged on a lower side 38b of the shielding element 34b.

The shielding element 34b has a bushing 40b. In the installed state, the bending area 22b of the printed circuit board 18b is passed through the leadthrough 40b.

In the assembled state, the sensor area 24b and the signal processing area 26b are oriented at an angle, namely at least substantially perpendicularly, to one another. In the assembled state, the sensor area 24b is aligned essentially parallel to a horizontal extent 66b of the hob 42b. The signal processing area 26b is arranged in an edge area 70b of the hob 42b and aligned essentially parallel to a vertical extent 68b of the hob 42b. The signal processing unit 16b is protected on the signal processing area 26b of the printed circuit board 18b in the edge area 70b of the hob 42b from thermal and electromagnetic influences of the heating unit 12b.

The shielding element 34b has a further passage 64b. In the mounted state, the additional bending area 58b of the additional printed circuit board 56b is passed through the additional passage 64b. In the installed state, the further sensor area 60b is arranged on the upper side 36b of the shielding element 34b and the further signal processing area 62b is arranged on the lower side 38b of the shielding element 34b. In the assembled state, the additional sensor area 60b and the additional signal processing area 62b are oriented at an angle, specifically at least substantially perpendicularly, to one another.

FIG. 5 shows a hob device 10c in a schematic plan view. The hob device 10c is part of a hob 42c designed as an induction hob and designed as an induction hob device. The hob device 10c includes a heating unit 12c with a plurality of heating elements 32c and with a plurality of further heating elements 50c. The heating elements 32c and the further heating elements 50c are each designed as inductors. The hob device 10c includes a sensor unit 14c for detecting a sensor signal (not shown) and a signal processing unit 16c for further processing and/or evaluating the sensor signal. The sensor unit 14c and the signal processing unit 16c are arranged together on a printed circuit board 18c of the hob device 10c. The printed circuit board 18c has a bending area 22c which separates a sensor area 24c from a signal processing area 26c. The printed circuit board 18c is flexible, at least in sections. The circuit board 18c is designed as a rigid-flex circuit board 28c.

The hob device 10c has a plurality of further sensor units 52c for detecting further sensor signals and a plurality of further signal processing units 54c for further processing and/or evaluating the further sensor signals, which are each arranged together on further printed circuit boards 56c of the hob device 10c. The further sensor units 52c, the further signal processing units 54c and the further printed circuit boards 56c are each formed essentially identically to one another, which is why the following description is limited to a further sensor unit 52c, a further signal processing unit 54c and a further printed circuit board 56c.

When the hob device 10c is in an operating state, the signal processing unit 16c uses the sensor signal and the additional signal processing unit 54c uses the additional sensor signal to determine the presence and/or degree of coverage of one or more of the heating elements 32b and/or the additional heating elements 50c of the heating unit 12b by a or several cooking utensils placed above (not shown).

Figure 6 shows a schematic sectional view of the hob device 10c. The hob device 10c has a shielding element 34c. The shielding element 34c has a bushing 40c. In the mounted state, the bending area 22c of the printed circuit board 18c is passed through the leadthrough 40c. In the mounted state, the sensor area 24c is arranged on an upper side 36c of the shielding element. In the assembled state, the signal processing area 26c is arranged on a lower side 38c of the shielding element 34c.

The sensor area 24c and the signal processing area 26c are aligned at least substantially parallel to one another in the assembled state. The sensor area 24c and the signal processing area 26c are each aligned essentially parallel to a horizontal extent 66c of the hob 42c. The signal processing unit 16c is on the signal processing area 26c of the circuit board 18c in one Lower area 72c of the hob 42c protected against thermal and electromagnetic influences of the heating element 32c of the heating unit 12c.

Reference sign

10 hob device

12 heating unit

14 sensor unit

16 signal processing unit

18 circuit board

20 control panel

22 bending area

24 sensor area

26 signal processing area

28 rigid-flex circuit board

30 semi-flexible circuit board

32 heating element

34 shielding element

36 top page

38 lower side

40 execution

42 hob

44 hob plate

46 protection element

48 bottom

50 more heating element

52 additional sensor unit

54 further signal processing unit

56 more circuit board

58 further bending area

60 more sensor area

62 additional signal processing area

64 further implementation Horizontal extension, vertical extension, edge area, lower area

Claims

Expectations

1. Hob device (10a; 10b; 10c), in particular induction hob device, with a sensor unit (14a; 14b; 14c) for detecting a sensor signal and with an electronic signal processing unit (16a; 16b; 16c) for further processing and/or evaluating the sensor signal , characterized by a circuit board (18a; 18b; 18c) on which the sensor unit (14a; 14b; 14c) and the signal processing unit (16a; 16b; 16c) are arranged together.

2. Hob device (10a; 10b; 10c) according to claim 1, characterized in that the printed circuit board (18a; 18b; 18c) has at least one bending area (22a; 22b; 22c).

3. Hob device (10a; 10b; 10c) according to claim 2, characterized in that the circuit board (18a; 18b; 18c;) is flexible at least in sections.

4. Hob device (10c) according to claim 3, characterized in that the printed circuit board (18c) is designed as a rigid-flex printed circuit board (28c).

5. Hob device (10b) according to claim 3, characterized in that the printed circuit board (18b) is designed as a semi-flexible printed circuit board (30b).

6. Hob device (10a; 10b; 10c) according to one of claims 2 to 5, characterized in that a signal processing area (26a; 26b; 26c) of the printed circuit board (18a; 18b; 18c) through the bending area (22a; 22b; 22c ) is separated from a sensor area (24a; 24b; 24c) of the circuit board (18a; 18b; 18c).

7. Hob device (10b) according to claim 6, characterized in that the sensor area (24b) and the signal processing area (26b) are aligned at an angle, in particular at least substantially perpendicularly, to one another in a mounted state.

8. Hob device (10c) according to claim 6, characterized in that the sensor area (24c) and the signal processing area (26c) are aligned at least substantially parallel to one another in an assembled state.

9. Hob device (10b; 10c) according to one of claims 6 to 8, characterized by a shielding element (34b; 34c), wherein the sensor area (24b; 24c) and the signal processing area (26b; 26c) in a mounted state on different sides ( 36b, 38b; 36c, 38c) of the shielding element (34b; 34c).

10. Hob device (10b; 10c) according to claim 9, characterized in that the shielding element (34b; 34c) has a bushing (40b; 40c) through which the bending region (22b; 22c) is guided in the assembled state.

11. Hob device (10a; 10b; 10c) according to any one of claims 6 to 10, characterized in that the signal processing area (26a; 26b; 26c) is at least substantially rigid.

12. Hob device (10a; 10b; 10c) according to any one of claims 6 to 11, characterized in that the sensor area (24a; 24b; 24c) is at least substantially rigid.

13. Hob device (10a) according to one of the preceding claims, characterized by at least one protective element (46a) arranged above the signal processing unit (16a) to protect the signal processing unit (16a) from thermal influences.

14. Hob device (10b; 10c) according to one of the preceding claims, characterized by a further sensor unit (52b; 52c) for detecting at least one further sensor signal, a further signal processing unit (54b; 54c) for further processing and/or evaluation of the further sensor signal - Nals and a further printed circuit board (56b; 56c) on which the further sensor unit (52b; 52c) and the further signal processing unit (54b; 54c) are arranged together.

15. Hob (42a; 42b; 42c), in particular induction hob, with at least one hob device (10a; 10b; 10c) according to one of the preceding claims.