DE102020109483A1 - Inductive kitchen system - Google Patents

Abstract

The invention relates to an inductive kitchen system (1, 2) with a kitchen appliance (1) with at least one induction element (12) and with at least one kitchen utensil (2) with at least one electrical energy store (28) which is designed to be at least one electronic Element (22-26) of the kitchen ware (2) to be supplied electrically. The inductive kitchen system (1, 2) is characterized in that the kitchen utensils (2) have at least one induction element (27) and the kitchen appliance (1) is designed to operate the induction element (12) in such a way that the electrical energy store (28) of the kitchen utensils (2) located on the induction element (12) can be inductively charged by means of the induction element (27) thereof.

Description

The invention relates to an inductive kitchen system according to the preamble of claim 1, a kitchen appliance for use in such an inductive kitchen system according to claim 13 and kitchen utensils for use in such an inductive kitchen system according to claim 14.

The trend in domestic cooking is always going towards making the execution of the cooking processes easier, more comfortable and / or safer for the user with regard to the desired cooking result. For this purpose, it has been known for a long time to use temperature sensors in the hob in order to be able to determine residual heat there for each hob after a cooking process has been carried out and to be able to display it to the user as a warning.

A cooking process or a cooking process can also be supported in that complete automatic programs or assistance functions are made available to the user, which are intended to relieve the user of part of the execution or even the complete execution of the cooking process. A cooking process can also be supported, for example, by the hob and / or by a mobile device, in that the cooking process is followed there, displayed to the user and the next actions in the recipe sequence are displayed or appropriate instructions are given to the user.

The hobs should also visually disappear further and further from the kitchen. This also includes making the control elements of the hobs increasingly inconspicuous or making them disappear completely. This can lead to the controls and the display elements of the hobs being relocated to the cookware. It may therefore be necessary or at least desirable for information to be able to be exchanged between the cookware and the hob. This can include the transmission of instructions as well as of measured quantities.

The EP 2 361 538 A1 relates to a thermoelectric-energy-generating, electronically temperature-measuring pan with a semiconductor cooling layer comprising a pan body, a pan handle which is attached to the pan body, a thermoelectric energy generation system and a temperature measuring system, the thermoelectric energy generation system by connecting the semiconductor cooling layer, an upward-regulating electronic component and a power storage device in series is formed, wherein one surface of the semiconductor cooling layer is in contact with the pan body and the other surface is connected to a heat dissipation device. The temperature measuring system is configured to measure the temperature of a bottom of the pan body. The thermoelectric power generation system is connected to the temperature measurement system in order to supply electrical energy to the temperature measurement system.

The disadvantage here is that thermoelectric energy generation, ie the conversion of heat into electricity, for example by means of the Seebeck effect, can technically mean a not inconsiderable expense, which leads to corresponding costs in production and / or assembly as well as additional installation space may need.

The EP 1 280 443 A1 relates to an electronic frying pan system with a pan for preparing food or foodstuffs, with a handle which is connected to the pan for moving or manipulating the pan, with one or more temperature sensors which are connected to the pan for signals generate which indicate a pan characteristic or a plurality of pan characteristics and with display electronics, which are connected to the sensors and are provided in or with the handle, in order to provide at least one indication or display of the pan characteristics to a user of the pan, wherein the display electronics includes a user interface for selecting one of a plurality of food characteristics. To supply the electronic elements with electrical energy, the electronic frying pan system has a replaceable battery in the handle as an electrical energy store.

The DE 10 2008 051 265 A1 relates to a cooking appliance, in particular a pressure cooker, with a control, regulating and operating device with at least one sensor device for detecting at least one parameter influencing a cooking process, with at least one microcontroller for data processing and control / regulation of cooking processes, with at least one data memory for Saving of sequence programs, of device parameters also surrounding devices relevant to the cooking process, of types of food and type of food parameters and for the documentation of cooking processes for a later evaluation and optimization of the same, with at least one data interface device, with at least one electrical energy store for energy supply, with at least one coupling device for detachable Connection of the control, regulating and operating device to the cooking appliance, with at least one output device for informing a user, and with at least one input device for operating de r Control, regulation and operating device.

The power supply of the control, regulation and operating device can, for example, by a battery, by a thermocouple, by inductive coupling such. B. in the case of an induction cooker or a battery. In the case of using a rechargeable battery, charging can be carried out via a data interface device of the cooking appliance, e.g. B. via a live line of a USB port, or optionally in a separate charging station.

The disadvantage of using a battery is that the stored electrical energy of the replaceable battery is finite and is consumed by the intended operation of the electronic frying pan system. From a certain low level of stored electrical energy or when the replaceable electrical energy storage device has been sufficiently used or emptied, the electronic functions of the electronic frying pan system of the EP 1 280 443 A1 or the cooking appliance of the DE 10 2008 051 265 A1 thus no longer operated and used by the user. For this purpose, the user has to replace the empty battery with a sufficiently charged battery, which can mean effort and cost time and money for the acquisition of the battery.

The disadvantage of using a rechargeable battery as an electrical energy store in the control, regulating and operating device of the DE 10 2008 051 265 A1 that this must also be recharged by the user if the stored electrical energy is used up. This can be an annoyance for the user.

The disadvantage of using a rechargeable battery or a replaceable battery as an electrical energy storage device is generally that the electronic functions of the electronic frying pan system EP 1 280 443 A1 or the cooking appliance of the DE 10 2008 051 265 A1 are not available to the user until the battery is replaced or the battery is sufficiently charged. This can limit the availability.

The disadvantage is also in the case of the control, regulation and operating device DE 10 2008 051 265 A1 that thermoelectric power generation is comparable to the pan EP 2 361 538 A1 can be technically complex and correspondingly expensive.

The disadvantage of inductive coupling of an induction cooker according to FIG DE 10 2008 051 265 A1 that the cooking appliance must be designed to receive inductive electrical energy to operate the electronic elements. The induction cooker must also be designed accordingly. This can represent a not inconsiderable effort. Furthermore, only suitable induction cookers and cookware can be used together for this purpose. The inductive energy supply can also only be used during inductive heating of the cookware for direct operation of the electronic elements of the control, regulating and operating device of the DE 10 2008 051 265 A1 be used.

In other words, the operating concepts of such cooking utensils, kitchen utensils or cooking utensils with integrated electronic elements require that, for example, an ON / OFF sensor is constantly on standby to detect input from a user. This in turn requires that a permanent or replaceable electrical energy storage device is installed, e.g. in the cookware handle of the cookware, which supplies the electronics or the electronic elements with electrical energy, e.g. to keep the touch sensors constantly on standby.

As such an electrical energy store, a short-term energy store such as a capacitor, for example, which can be integrated into a cookware handle, will usually not be able to provide the required electrical energy to operate the electronic elements on a permanent basis. For this reason, electrical energy stores such as batteries or rechargeable batteries are usually used as described above, which can at least allow operation over several days and possibly several weeks with a typical daily usage time for such cooking utensils.

If the electrical energy storage device is empty, the user must replace the cookware as a battery or charge it as a rechargeable battery before using the cookware again, e.g. in the form of a system cookware. If this cannot be done, e.g. because the commercially available battery used is not available spontaneously or special batteries first have to be ordered from the manufacturer or the battery has to be waited for charging, only manual, conventional operation of the cookware is possible as a system cookware Control via the hob, possible. This means, for example, that assistance functions and the like cannot be selected on the cookware. Possibly. Existing safety functions of the cookware, such as a safety function that is always active in the background to limit the maximum temperature of the cookware, cannot be used in this case either.

If the electronic elements of the cooking utensils are supplied inductively electrically by the induction cooker, this is only possible while the induction cooker is in operation. A feeding of the Electronic elements of the cookware outside of the cooking mode is not possible, which is why the functions of the electronic elements of the cookware are then not available. If this is desired, as described above, an electrical energy store is to be used, which, however, is accompanied by the disadvantages described above.

The invention thus poses the problem of providing an inductive kitchen system of the type described at the outset, so that the electronic elements of the kitchen ware are ready for operation at any time or the functions of the electronic elements of the kitchen ware are available at any time. In particular, changing the battery is to be avoided and / or the charging of batteries is to be simplified for the user. At least one alternative to known inductive kitchen systems of this type is to be created.

According to the invention, this problem is solved by an inductive kitchen system with the features of claim 1, by a kitchen appliance with the features of claim 13 and by kitchen utensils with the features of claim 14. Advantageous refinements and developments of the invention emerge from the following subclaims.

The invention thus relates to an inductive kitchen system with a kitchen appliance with at least one induction element and with at least one kitchen utensil with at least one electrical energy store, which is designed to supply electricity to at least one electronic element of the kitchen utensils. The kitchen appliance can be any type of kitchen appliance that can be used in a kitchen for preparing, preparing and / or storing food and serving prepared food. This can in particular be a hob, an oven, a steam cooker, a microwave oven, a refrigerator, a scale and the like. The kitchen utensils can be any type of kitchen utensils which can also be used in a kitchen for preparing, preparing and / or storing food and serving prepared food. These can in particular be saucepans, casseroles, frying pans and the like. The electrical energy store is a chargeable or a rechargeable electrical energy store such as a capacitor or a battery, as will be described in more detail below. The electronic elements of the kitchen utensils can be, for example, sensors, display and / or control elements, control elements and the like.

The inductive kitchen system according to the invention is characterized in that the kitchen utensil has at least one induction element and the kitchen appliance is designed to operate the induction element in such a way that the electrical energy storage of the kitchen utensils located on the induction element can be inductively charged by means of its induction element. In other words, according to the invention, the electrical energy store of the kitchen utensils can be charged or recharged by the kitchen appliance. The induction elements can be implemented as induction coils.

The advantage here is that additional charging devices can be dispensed with. There is also no need to replace a used electrical energy storage device such as a battery. This can increase the convenience for the user. This can also increase the availability of the kitchen utensils or their electronic functions.

The invention is based on the knowledge that so far the electronic elements of kitchen utensils have either been operated with electrical energy which is stored in an electrical energy store or is inductively coupled into the kitchen utensil from the kitchen appliance at this moment and used directly. This limits this possibility, since electrical energy cannot be made available inductively in every operating state of the kitchen appliance. For example, a kitchen appliance in the form of an inductive hob can either provide inductive electrical energy in order to be able to operate functions of the kitchen ware, or the kitchen ware can be inductively heated by the inductive hob; At this moment or in this operating state, however, the functions of the electronic elements of the kitchen utensils are not available.

Up to now, the possibility of inductively feeding electronic elements of kitchen utensils has only been used in the case of inductive hobs, since there is already at least one induction element per hob. If there is no induction element in a kitchen appliance, the possibility of inductive electrical supply of the kitchen utensils is not available.

According to the invention, therefore, an already existing induction element, e.g. an inductive hob or an induction element specially provided for this purpose, e.g. an oven, steam cooker, refrigerator, scale and the like can be used to (re) charge and recharge a rechargeable or rechargeable electrical energy store of the kitchen utensils in this way to achieve the advantages mentioned above.

According to one aspect of the invention, the induction element is designed as an inductive heating element to further inductively heat the kitchen utensils. The induction element can thus perform two functions which can differ from one another in terms of the manner of operation, as will be described in more detail below. This can keep the effort for implementing the invention low.

According to a further aspect of the invention, the electrical energy store of the kitchen ware is a short-term energy store, preferably a capacitor, and the kitchen appliance is designed to operate the induction element, preferably repeatedly, briefly with a sufficiently high electrical power, so that the electrical energy store of the induction element Kitchenware located can be charged inductively by means of the induction element. This can simplify the implementation of the invention and keep the effort, the costs and / or the installation space for the electrical energy store low.

According to a further aspect of the invention, the electrical energy store of the kitchen ware is a long-term energy store, preferably a rechargeable battery, and the kitchen appliance is designed to operate the induction element for a sufficiently long time with a sufficiently high electrical power so that the electrical energy store of the kitchen ware located on the induction element by means of whose induction element can be charged inductively. This can keep the number and / or the duration of the charging processes low and / or increase the availability of the functions of the electronic elements of the kitchenware.

According to a further aspect of the invention, the kitchen appliance is designed to operate the induction element with such a low electrical power that the electrical energy store of the kitchen ware located on the induction element is inductively charged by means of its induction element, but a predetermined temperature increase of the kitchen ware caused by the inductive charging, preferably a maximum of 35 K can be maintained. This can avoid excessive heating of the kitchen utensils which, if touched by the user, could lead to burns or at least be perceived as unpleasant.

According to a further aspect of the invention, the kitchen ware has a temperature sensor which is designed to detect a temperature of the kitchen ware, preferably a bottom of the kitchen ware, and the kitchen appliance is designed to measure the predetermined temperature increase of the kitchen ware caused by inductive charging as a function of the to comply with the temperature recorded by the temperature sensor of the kitchen utensils. This can enable the implementation of a control and / or regulation on the part of the kitchen appliance, so that the charging process can be carried out with the greatest possible electrical power and thus completed as quickly as possible without simultaneously exceeding the predetermined permissible temperature increase of the kitchen ware.

According to a further aspect of the invention, the kitchen ware has a temperature sensor which is designed to detect a temperature of the kitchen ware, preferably a base of the kitchen ware, and the kitchen appliance and / or the kitchen ware is or are designed to respond to a user To indicate temperature increase and / or to notify the temperature increase. In this way, the user can be made aware of the temperature increase and, if necessary, can be specifically informed about the extent of the temperature increase. In particular, the user can be informed of the temperature increase by means of an optically displayed symbol and / or a specific optically displayed temperature information.

According to a further aspect of the invention, the kitchen appliance is designed to operate the induction element at an electrical frequency so that the electrical energy storage of the kitchen ware located on the induction element can be inductively charged by means of its induction element, but heating of the kitchen ware can be kept low. This can in particular be a frequency which is unsuitable for inductive heating of the kitchen utensils. This can enable the electrical energy store of the kitchen utensil to be charged and, at the same time, minimize or even avoid its undesired heating as a result of the inductive electrical coupling.

According to a further aspect of the invention, the kitchen appliance is designed to operate the induction element with an electrical frequency which is lower or higher than a frequency suitable for inductive heating so that the skin effect in a base of the kitchen ware is kept sufficiently low or sufficient can be reinforced, so that heating of the kitchen utensils can be kept low. The skin effect is a current displacement effect that occurs in electrical conductors through which higher-frequency alternating current flows. This has the effect that the current density in the interior of an electrically conductive conductor is lower than in its outer regions. The skin effect can contribute to the inductive heating of kitchen utensils and can be used with inductive hobs.

According to a further aspect of the invention, the kitchen appliance and / or the kitchen utensils are designed to inform a user that the electrical energy store of the kitchen utensils is being charged. This can be done by optical, acoustic and / or haptic means. Such information can also be transmitted from the kitchen appliance and / or from the kitchen utensils to a mobile device of the user, such as a smartphone, and there it can be communicated to the user optically, acoustically and / or haptically. In any case, this can inform or remind the user that a charging process is being carried out between the kitchen appliance and kitchen utensils, so that the user does not inadvertently remove the kitchen utensils from the induction element and thereby interrupt or terminate the charging process.

According to a further aspect of the invention, the kitchen utensil is designed to determine the state of charge of the electrical energy store and to communicate it to a user. This can be done by optical, acoustic and / or haptic means. Such information from the kitchen utensils can also be transmitted to the kitchen appliance and / or to a mobile device of the user, such as a smartphone, and there it can be communicated to the user optically, acoustically and / or haptically. In any case, the user can be kept up to date on the current charge status of the kitchen utensils in this way.

According to a further aspect of the invention, the kitchen appliance is an inductive hob with at least one hob which has the induction element as an inductive heating element, and the kitchen utensil is designed as cooking utensils to be inductively heated by the inductive heating element, the inductive hob being designed in to operate the inductive heating element in a standby mode in such a way that the electrical energy store of the cooking utensils located on the hob can be inductively charged by means of its induction element, and in an operating mode to operate the inductive heating element in such a way that the cooking utensils located on the inductive hob can be inductively heated . In the standby mode, various functions of the inductive hob can be used without a power output by means of the inductive heating element being possible to the cooking utensil, which could lead to intended inductive heating of the cooking utensils. This is only possible in the operating mode. With an inductive hob, this makes it possible to use both functions of the inductive kitchen system separately.

The invention also relates to a kitchen appliance, preferably an inductive hob, for use in an inductive kitchen system as described above. Thus, a kitchen appliance such as a hob, an oven, a steam cooker, a microwave oven, a refrigerator, a scale and the like can be provided to implement the inductive kitchen system of the present invention as described above.

The invention also relates to kitchen utensils, preferably cooking utensils, for use in an inductive kitchen system as described above. Thus, kitchen utensils such as a saucepan, casserole, frying pan and the like can be provided to implement the inductive kitchen system of the present invention described above.

According to one aspect of the invention, the kitchen utensil is designed to recognize a predetermined low state of charge of the electrical energy store and to output at least one corresponding message to a user in response to this. This can be done by optical, acoustic and / or haptic means. Such information from the kitchen utensils can also be transmitted to the kitchen appliance and / or to a mobile device of the user, such as a smartphone, and there it can be communicated to the user optically, acoustically and / or haptically. In any case, this can ensure that the kitchen utensils are charged in good time before the electrical energy storage of the kitchen utensils is depleted so far that the electronic elements of the kitchen utensils can no longer be operated and thus before the next use of the functions of the Electronic elements of the kitchen ware have to be charged, which can delay and / or limit their use.

In other words, if a low energy level of kitchen utensils or cookware is recognized as system cookware, i.e. as kitchen or cookware with electronic elements, this can be displayed, for example, via a display element, e.g. in the handle of the kitchen utensil. This can signal to the user that the system cookware needs to be charged. This can be done by the user in various ways.

For example, the system cookware can be placed on a cooking zone by the user and the power of this cooking zone can be switched on manually by the user. An energy harvesting coil integrated in the bottom of the cookware can charge an electrical energy storage device in the cookware. The state of charge can be signaled by the display element. For example, the following charging statuses can be signaled: empty (charging required), critical charging status, half full, full. A percentage can also be given. If the electrical energy storage of the kitchen ware is sufficiently charged, it may be possible, for example, to select an assistance function immediately after switching on the cookware and / or immediately after switching on the hob and / or immediately after manually selecting a power on the cookware or hob.

• Es kann eine hohe Leistung für eine kurze Zeit auf die Kochzone aufgeschaltet werden, um einen Kurzzeitspeicher wie z.B. ein Goldcap oder einen Kondensator aufzuladen, um damit z.B. die Touchbedienung am Systemkochgeschirr mit Energie zu versorgen.

If a system cookware is recognized on the cooking zone and / or a low battery level is transmitted from it, power can be switched to the cooking zone and the electrical energy storage of the cookware can be charged. This can be done in different ways:

• A high output can be switched to the cooking zone for a short time in order to charge a short-term storage device such as a gold cap or a capacitor in order to supply the touch controls on the system cookware with energy, for example.

A high power can be switched on for a short, permanent or over a longer period of time, e.g. to recharge a gold cap or a capacitor and / or to charge a battery.

In this case, it can be particularly useful to only clock the power or to select the power setting so that the cookware temperature of 35 K temperature increase is not exceeded. In the EN60335-2-6 standard, section 22.115, a test of the pan detection for induction hobs is described, in which a defined piece of metal is placed on the induction hob to test the pan detection. This can be recognized, but a temperature increase of 35 K must not be exceeded. It can therefore be assumed that a temperature increase of max. 35 K should always be normatively permissible during the loading process of the cookware.

If the cookware contains a temperature sensor, this can be used to precisely limit the temperature or the temperature rise.

The active charging process can also be displayed on the cookware and a higher cookware temperature signaled to the user.

The frequency of the alternating magnetic field can be selected so that inductive energy transfer for charging the electrical energy store via the coil coupling is still possible, but the bottom of the cookware is not noticeably heated. Preferably, either a frequency is to be selected that is far below the usual operating frequency of an induction hob in order to minimize the skin effect in the floor and the associated heating. At the same time, the frequency must be high enough to enable the energy transmission to be sufficiently efficient. Alternatively, a frequency can be selected which is far above the usual operating frequency, at which magnetization reversal is no longer possible in the ground and the skin effect is reinforced in such a way that heating is no longer possible either. The energy transfer to the energy harvesting coil and thus also the charging function can remain in place.

It is also conceivable, for example, to dispense with an on / off sensor on the cookware and to provide only the operation of the heat setting and / or the assistance functions and / or the confirmation button for an instruction from a mobile device. The hob is then always switched on using the on / off switch on the hob. If system cookware is detected, charging can be carried out as described above. This means that, for example, a rechargeable battery or a battery can be completely dispensed with. A short-term storage device such as a gold cap and / or a capacitor is sufficient.

It is also conceivable to transfer the previously described aspects of the invention to other kitchen appliances and their accessories.

For example, consider an oven or a steam cooker. The system cookware such as a system roaster is placed in the oven or in the steam cooker on a special rack such as on a system baking tray. This can have an inductive element similar to a coil in an induction hob for energy transmission. This enables the electronics in the system crockery to be supplied with energy as described above. Sensor values such as temperature, pressure, weight and / or humidity readings of the system cookware can be sent to the built-in appliance as a kitchen appliance. This can process the values in process engineering and control the processes accordingly. Optionally, the same coil in the oven or steam cooker slot, such as a system baking tray, can be used to heat the system cookware. If the optional heating can be dispensed with, only an inductive element, for example a coil for wireless charging of a mobile device, can be required in the oven tray.

For example, an inductive element can be placed in a shelf in a refrigerator like a coil in a Qi charger for wireless charging of a mobile device. This enables the electronics in the system crockery to be supplied with energy as described above. The sensor values such as temperature, pressure, weight and / or humidity readings in the system cookware can be sent to the communication unit of the refrigerator. Sequences in recipes in which cooling is required in a recipe step can give the user an indication when the required minimum or reduced temperature has been reached. If the system cookware contains an energy store such as a battery, this device for power supply may not be necessary.

For example, an inductive element similar to a coil in a Qi charger for wireless charging of a mobile device can be integrated in a system scale as an external scale, e.g. as a table-top device on the worktop. This enables the electronics in the system crockery to be supplied with energy as described above. The sensor values such as temperature and weight can be sent wirelessly, e.g. via WLAN, to a mobile device. Sequences in recipes in which the weighing of an ingredient or a food is required in a recipe step can give the user an indication when the required amount has been added. Alternatively, the weight can be displayed directly on the system cookware during the weighing process. This can be done as a decimal value. Alternatively, conceived as a system of system cookware with a recipe, the message "add more", "sufficient quantity", "too much" can be made on the system cookware, for example. If the system cookware contains an energy store such as a battery, this device for power supply may not be necessary.

• 1 eine schematische Darstellung eines erfindungsgemäßen induktiven Küchensystems von der Seite.

An embodiment of the invention is shown purely schematically in the drawing and is described in more detail below. It shows

• 1 a schematic representation of an inductive kitchen system according to the invention from the side.

The above figure is viewed in Cartesian coordinates. It extends in a longitudinal direction X which also called depth X or as length X can be designated. Perpendicular to the longitudinal direction X extends a transverse direction (not shown), which can also be referred to as width. Perpendicular to both the longitudinal direction X as well as a vertical direction extends to the transverse direction Z which also called height Z can be designated.

1 shows a schematic representation of an inductive kitchen system 1 , 2 of the page. The inductive kitchen system 1 , 2 consists of a kitchen appliance 1 in the form of an inductive hob 1 as well as from a kitchen utensil 2 in the form of a cookware 2 , which is exemplified as a pan 2 is implemented. The pan 2 is to improve the displayability of the 1 in height Z above the inductive hob 1 arranged.

The inductive hob 1 can have several hotplates, of which only a first hotplate 11 in the 1 is shown by way of example. The inductive hob 1 has a cover 10 , for example in the form of a glass plate or a kitchen worktop, which is the surface of the inductive hob 1 forms on which cookware 2 such as the pan 2 can be placed on the hotplates. There is an induction element under each hob 12th as an inductive heating element 12th provided, which in this case an induction coil 12th is. A temperature of the first hotplate 11 can be used as the hotplate temperature by means of a sensor element 13th in the form of a temperature sensor 13th are recorded.

The inductive hob 1 also has a transmitting / receiving unit 14th which is able to receive wireless signals, e.g. from the pan 2 to receive as well as wireless signals e.g. to the pan 2 to send out. The induction coil 12th , the temperature sensor 13th as well as the transmitter / receiver unit 14th are signal-transmitting with a control unit 15th of the hob 1 connected, which process signals or data, generate as well as the induction coil 12th , the temperature sensor 13th and the transmitter / receiver unit 14th can operate or control.

The pan 2 has a kitchen utensil body 20th or a cookware body 20th as a pan body 20th on which side a handle element 21 or a handle 21 is arranged. The pan body 20th has a flat bottom 29 with which the pan 2 on the first hotplate 11 of the inductive hob 1 can be put on. In the ground 29 of the pan body 20th is a sensor element 24 in the form of a temperature sensor 24 provided so that a temperature of the soil 29 of the pan body 20th can be sensed at this point as the cookware temperature.

The handle 21 has a display element 22nd , for example in the form of a liquid crystal display or light-emitting semiconductor, as well as an operating element 23 , for example in the form of a button or touch sensor or proximity sensor. Display element 22nd and control element 23 serve at least to produce or initialize a pairing of the pan 2 with the inductive hob 1 or with its first hotplate 11 . Furthermore, the handle 21 a transmitter / receiver unit 25th on. The display element 22nd , the control element 23 , the sensor element 24 as well as the transmitter / receiver unit 25th are each transmitting signals with a control unit 26th connected (not shown). The display element 22nd , the control element 23 , the sensor element 24 , the sender / receiver unit 25th as well as the control unit 26th represent the electronic elements 22-26 the pan 2 represent.

In the ground 29 of the pan body 20th is concentric to the center point and when the first hotplate is used as intended 11 facing an induction element 27 in the form of an induction coil 27 arranged. The induction coil 27 is energy transferring with an electrical energy storage 28 connected, which one under control 21 arranged and in turn with the electronic elements 22-26 the pan 2 is connected to transmit energy and can feed it electrically. The electrical energy storage 28 can be used, for example, as an electrical short-term energy store 28 eg as a capacitor 28 or as electrical long-term energy storage 28 e.g. as a battery 28 be trained.

Know the pan 2 a battery 28 on, so can the functions of the electronic elements 22-26 the pan 2 can be used by the user as long as there is sufficient electrical energy in the battery 28 is stored. The stored electrical energy of the battery declines 28 the end, this can be done, for example, by the control unit 26th the pan 2 recognized and a corresponding message, for example via the display element 22nd the pan 2 issued to the user.

The user can then use the pan 2 on the first hotplate 11 of the inductive hob 1 set so that an inductive coupling of the induction coil 12th the first hotplate 11 and the induction coil 27 the pan 2 can be done which the battery 28 the pan 2 can charge. This can be done manually by the user by setting the user to a low power level on the first hotplate 11 of the inductive hob 1 adjusts.

This can also be done automatically by the inductive hob 1 be done by setting the first hotplate accordingly 11 on the part of the control unit 15th of the inductive hob 1 is made. In this case, a message from the inductive cooktop can be sent at the same time 1 and / or on the part of the pan 2 eg via its display element 22nd done to the user that inductive charging of the battery 28 the pan 2 is made. This can also prevent the user from increasing the temperature of the pan 2 warn which may occur due to inductive coupling.

The induction coil 12th the first hotplate 1 can on the part of the control unit 15th of the inductive hob 1 for this purpose, operated in a standby mode in such a way that a sufficiently low power is transmitted by means of the inductive coupling, which does not lead to heating of the pan 2 can lead. For this purpose, for example, the frequency of the electromagnetic field generated by the induction coil 12th the first hotplate 11 starts to be chosen so low or high that the skin effect in the soil 29 of the pan body 20th can be caused sufficiently little or so strongly that a warming of the floor 29 of the pan body 20th can be minimized.

In a separate operating mode, the induction coil 12th the first hotplate 1 on the part of the control unit 15th of the inductive hob 1 as previously known for inductive heating of the pan 2 operate.

List of reference symbols

X

Longitudinal direction; Depth; length

Z

vertical direction; height

1

Kitchen appliance; inductive hob

10

Cover; Glass top or kitchen countertop

11

first hotplate

12th

Induction element; inductive heating element; Induction coil

13th

Sensor element; Temperature sensor

14th

Transmitter / receiver unit

15th

Control unit

2

Kitchen ware; Cooking utensils; pan

20th

Kitchen ware bodies; Cookware bodies; Pan body

21

Handle element; Handle

22nd

Display element; Liquid crystal display

23

Control element; stud

24

Sensor element; Temperature sensor

25th

Transmitter / receiver unit

26th

Control unit; Signal processing unit

27

Induction element; Induction coil

28

electrical (short-term / long-term) energy storage; Capacitor; battery pack

29

ground

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 2361538 A1 [0005, 0013]
• EP 1280443 A1 [0007, 0010, 0012]
• DE 102008051265 A1 [0008, 0010, 0011, 0012, 0013, 0014]

Claims (15)

Inductive kitchen system (1, 2) with a kitchen appliance (1) with at least one induction element (12) and with at least one kitchen utensil (2) with at least one electrical energy store (28) which is designed to include at least one electronic element (22-26) of the kitchen utensils (2), characterized in that the kitchen utensils (2) have at least one induction element (27) and the kitchen appliance (1) is designed to operate the induction element (12) in such a way that the electrical energy store (28) of the kitchen utensils (2) located on the induction element (12) can be inductively charged by means of the induction element (27) thereof. Inductive kitchen system (1, 2) according to Claim 1 , characterized in that the induction element (12) is designed as an inductive heating element (12) to further inductively heat the kitchen utensils (2). Inductive kitchen system (1, 2) according to Claim 1 or 2 , characterized in that the electrical energy store (28) of the kitchen utensils (2) is a short-term energy store (28), preferably a capacitor (28), and the kitchen appliance (1) is designed to briefly use the induction element (12), preferably repetitively to operate a sufficiently high electrical power so that the electrical energy store (28) of the kitchen utensils (2) located on the induction element (12) can be inductively charged by means of its induction element (27). Inductive kitchen system (1, 2) according to Claim 1 or 2 , characterized in that the electrical energy store (28) of the kitchen utensils (2) is a long-term energy store (28), preferably a battery (28), and the kitchen appliance (1) is designed, the induction element (12) sufficiently long with a sufficiently high to operate electrical power so that the electrical energy store (28) of the kitchenware (2) located on the induction element (12) can be inductively charged by means of its induction element (27). Inductive kitchen system (1, 2) according to one of the preceding claims, characterized in that the kitchen appliance (1) is designed to operate the induction element (12) with such a low electrical power that the electrical energy store (28) of the Induction element (12) located kitchen utensils (2) by means of the induction element (27) inductively charged but a predetermined temperature increase of the kitchen utensils (2) caused by the inductive charging, preferably of a maximum of 35 K, can be maintained. Inductive kitchen system (1, 2) according to Claim 5 , characterized in that the kitchen ware (2) has a temperature sensor (24) which is designed to detect a temperature of the kitchen ware (2), preferably a base (29) of the kitchen ware (2), and the kitchen appliance (1) is designed to maintain the predetermined temperature increase of the kitchen utensils (2) caused by the inductive charging as a function of the temperature detected by the temperature sensor (24) of the kitchen utensils (2). Inductive kitchen system (1, 2) according to Claim 5 or 6th , characterized in that the kitchen ware (2) has a temperature sensor (24) which is designed to detect a temperature of the kitchen ware (2), preferably a base (29) of the kitchen ware (2), and the kitchen appliance (1) and / or the kitchen utensils (2) is / are designed to inform a user of the temperature increase and / or to notify the temperature increase. Inductive kitchen system (1, 2) according to one of the preceding claims, characterized in that the kitchen appliance (1) is designed to operate the induction element (12) at an electrical frequency, so that the electrical energy store (28) of the induction element ( 12) located kitchen utensils (2) by means of the induction element (27) inductively charged, but heating of the kitchen utensils (2) can be kept low. Inductive kitchen system (1, 2) according to Claim 8 , characterized in that the kitchen appliance (1) is designed to operate the induction element (12) with an electrical frequency which is lower or higher than a frequency suitable for inductive heating, so that the skin effect in a floor (29 ) of the kitchen utensils (2) can be kept sufficiently small or sufficiently reinforced so that the heating of the kitchen utensils (2) can be kept low. Inductive kitchen system (1, 2) according to one of the preceding claims, characterized in that the kitchen appliance (1) and / or the kitchen utensils (2) is / are designed to allow a user to respond to an ongoing charging process of the electrical energy store (28) of the kitchen utensils ( 2) should be pointed out. Inductive kitchen system (1, 2) according to one of the preceding claims, characterized characterized in that the kitchen utensil (2) is designed to determine the state of charge of the electrical energy store (28) and to communicate it to a user. Inductive kitchen system (1, 2) according to one of the preceding claims, characterized in that the kitchen appliance (1) is an inductive hob (1) with at least one hotplate (11) which has the induction element (12) as an inductive heating element (12) , and the kitchen utensil (2) is designed as cooking utensils (2) to be heated inductively by the inductive heating element (12), the inductive hob (1) being designed to operate the inductive heating element (12) in a standby mode, that the electrical energy store (28) of the cooking utensils (2) located on the hob (11) can be inductively charged by means of its induction element (27), and in one operating mode the inductive heating element (12) can be operated in such a way that the on the inductive hob (11) located cooking utensils (2) can be heated inductively. Kitchen appliance (1), preferably an inductive hob (1), for use in an inductive kitchen system (1, 2) according to one of the Claims 1 to 12th . Kitchen utensils (2), preferably cooking utensils (2), for use in an inductive kitchen system (1, 2) according to one of the Claims 1 to 12th . Kitchen utensils (2) Claim 14 , characterized in that the kitchen utensil (2) is designed to recognize a predetermined low state of charge of the electrical energy store (28) and to output at least one corresponding message to a user in response to this.

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