DE102010043770A1 - Household operating device and method for centering a set-top device on a household control gear - Google Patents

Abstract

The household operating device (406) has at least one base station (411) for transformably operating a top-mounted device thereon, wherein the household operating device (406) an offset detection means for detecting an offset (r) between one of the at least one base station (411) and the associated attachment device and the household operating device (406) is adapted to output depending on a size of the detected by the offset detection means offset (r) to this base station (411) associated acousto-optical signal. The method serves for centering a set-top device on a base station (411) of a domestic operating device (406) that can be coupled thereto in a transformer, the method having at least the following steps: detecting a size of an offset (r) between the top-down device and the associated base station (411 ) and outputting at least one optical signal depending on the size of the offset (r).

Description

The invention relates to a household operating device for transformatory operation of an attachable thereon attachment. The invention further relates to a method for centering an attachment device on a base station of a domestic operating device which can be coupled in a transformer-like manner.

For example DE 103 43 011 A1 . DE 10 2005 022 352 A1 . DE 10 2006 017 800 A1 and DE 10 2006 017 801 A1 is a power transmission from a working zone of a household control gear on a set-top device by means of inductive coupling known. Under an inductive coupling while the coupling of a base station or primary coil of the household control gear and a secondary coil of the attachment device is understood via an alternating magnetic field, which is generated by the primary coil and tapped from the secondary coil. In the secondary coil, an induction voltage is generated by means of the alternating magnetic field, which can be used to operate the attachment device. Primary coil and secondary coil can also be considered as two halves of a separable transformer, which is why this type of coupling and power transmission is also called "transformer coupling".

DE 10 2008 054 904 A1 discloses that a household attachment or a domestic operating device may each have at least one power coil, each having at least one power winding for inductive tapping of energy from an electromagnetic excitation field or generation thereof, wherein the respective power winding is located in a power winding plane, and further each a signal coil each having at least one signal winding, wherein the signal winding is in a signal winding plane. The power winding plane is substantially parallel to the signal winding plane.

The position of the base station is currently displayed via a corresponding print on a surface of the household control gear.

It is the object of the present invention to provide in a simple manner an improved transformer coupling between a base station of a household control gear and an associated attachment device.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a household operating device having at least one base station for transformer-operated operation of a top-mounted device, the domestic operating device having an offset detection device for detecting an offset between a base station and an associated attachment device and the household operating device is adapted to depending on a size of the detected by the offset detection means offset output to this base station acousto-optical (ie, an acoustic and / or optical) signal.

This provides the advantage that a user based on the offset-dependent optical signal or a change thereof can simply move the attachment on the household control gear until it is displayed a sufficiently low offset. Thus, the user is provided with a simple and intuitively usable centering aid. A reduced offset in turn allows a more energy-efficient operation of a set-top device, eg. As an electrically operated essay cookware (pot, pan, etc.). Also results in an improved EMC behavior by limiting radiation.

The base station may in particular comprise at least one transformer half or coil ("primary coil") for generating an alternating magnetic field.

The attachment device may in particular be an electrically operable attachment device, which has at least one (secondary-side) transformer half or coil ("secondary coil") for tapping the magnetic alternating field generated by the primary coil. The secondary coil can, in particular, supply an induction voltage used for operating the attachment device, possibly rectified.

The offset detection means serves to determine a lateral offset or decentration of the attachment with respect to a central position on the associated base station.

The fact that the household operating device is set up to emit an optical signal associated with this base station, depending on a size of the offset detected by the offset detection device, may in particular mean that different optical signals are output for at least two different offset sizes or offset ranges. The household operating device may in particular be adapted to change an optical signal at a transition between at least two offset ranges, for. B. a color or a flashing pattern. Alternatively, you can the optical signal is changed continuously or quasi-continuously, z. As a color as a (quasi) continuous function of the size of the offset.

In the presence of at least two offset regions, in particular an inner offset region can be present, which comprises the non-offset state. The inner offset region is adjoined by another offset region, to which another offset region may be added, etc.

It is a further development that the offset detection device is set up to measure a power taken off the associated attachment device, via the base station or primary coil. The power consumed by the attachment may then be compared to a desired performance and used to determine the offset, since the power consumed depends on the offset. The target power can z. B. entered by a user or selected or automatically detected by the household control gear. The target power can z. B. be a rated power of the attachment. This embodiment has the advantage that the offset detection can also be carried out without communication from the attachment device to the household operating device.

It is an alternative or additional development that the offset detection means is adapted to adjust the size of the offset by comparing a data signal level of a transmitted to or from the attachment device (or one of the household operating device sent to this attachment device or received from this attachment device ) To determine a data signal with a desired signal level. This development requires an ability to communicate from the set-top box to the home appliance, is relatively accurate, and can be performed without knowing a target power, and so on. In particular, a comparatively low power consumption can be accurately detected by the attachment device. Here, too, it is exploited that the size of the measured data signal level depends on the offset, in particular in the case of a transformer coupling also for data signal transmission. With an offsetless attachment, the data signal level is maximum.

The offset detection device can, in particular in an offset detection based on a transformer coupling signal evaluation at an offset of several centimeters, z. B. to about 5 cm, ensure.

It is an embodiment that the household operating device has a top-side worktop and at least one of the base stations is associated with a fixed predetermined localized optical radiation area for outputting the associated optical signal to a surface of the worktop. This allows the user to see the optical signal in the area of the attachment, which allows a particularly simple centering.

The at least one radiation area is preferably centered about a center of the associated base station. In particular, the at least one emitting region can be positioned rotationally symmetrical to a center of the associated base station, which further supports centering.

The household operating device may for this purpose have at least one light source, for. B. at least one light emitting diode (including an OLED), fluorescent tube, etc.). In this case, light-emitting diodes are preferred because of their compact dimensions, high luminance, precisely defined wavelength and long life. The at least one light source can be followed by at least one light guide, whereby the light emitted by the light source can be conducted to the emission area. A light guide and / or a radiation area can be assigned to a plurality of light sources, in particular light sources emitting different colors. The at least one light guide may be mounted in or on a support frame under a worktop.

The at least one emitting region may comprise, for example, at least one illuminable ring (in the case of several rings these are preferably arranged concentrically and / or equidistant from each other), a matrix pattern of individual radiating elements (illuminable points, crosses, etc.) or a cross-shaped radiating region.

The at least one emission area can furthermore have an individually illuminatable central emission element. Thus, a location of the base station can be displayed in a discreet and energy-saving manner even when the base station is not switched on and / or when the set-top device is not recognized. The central emission element can in particular coincide with a central location of the base station.

It is still an embodiment that the worktop is translucent at least at the at least one optical emission range and the household operating device has at least one light source, the light of which can be emitted as the optical signal at at least one localized emission region of a surface of the countertop. Thus, a particularly well cleanable household control gear is made possible with a comparatively easy to implement lighting. Also, a particularly simple design adaptation of the light guide is possible. The light guide can end in particular immediately below the worktop.

The worktop may in particular be a base plate (s), also together, covering glass plate, glass ceramic plate or (due to the systemic low temperature at the bottom of the attachment device) plastic plate.

The worktop may be colored and / or have a filtering function against light.

Alternatively, the worktop may comprise an opaque base body, for. As wood or metal. The base stations can be embedded in the worktop. In particular, in the case of the opaque base body, optical fibers can be passed through the worktop and possibly even through the base station (s) to the surface of the household control gear.

Also, the optical signal z. In a display area of a device operation, for example, in a screen (eg, a segment display, a liquid crystal panel, a TFT screen, etc.), for example, in the form of a filled circle. The circuit can, depending on the configuration for changing the optical signal change its color, be activated and deactivated, flashing, etc. The display area can be arranged on the front or be embedded on the top side in the worktop.

It is also an embodiment that the household operating device is adapted to output an optical signal having a color dependent on the size of the offset detected by the offset detection device. Because the human eye is sensitive to colors, it is possible to clearly and intuitively detect the change in the optical signal. By way of example, the optical signal may comprise a radiation of red light from the emission area if the offset is outside the inner offset area and will change to green light emission as it enters the inner offset area. The user can thus recognize a sufficient centering by a color change from red to green.

Alternatively, instead of a color change z. For example, the optical signal may include a flashing emission of light from the emission region if the offset is outside the inner offset region, and a continuous emission upon entry into the inner offset region and, optionally, after a predetermined period of time within the inner offset range, comprise at least partial deactivation or deactivation of the emission range.

In yet another embodiment, the domestic operating device is set up to activate the associated at least one emission area when the base station is switched on. Thus, a user, the location of the base station or hotplate for mounting the attachment device can be easily displayed, even if the base station itself is not or only slightly hidden under a worktop hidden.

It is yet an embodiment that the household operating device has a pan detection for detecting a set-top device to an associated base station and is adapted to change the associated with this base station optical signal at a recognized attachment. Thus, a user may be notified of the correct recognition of the set top device by the home appliance by means of a particular optical signal sequence (eg, a triple blink, etc.).

Instead of or in addition to the optical signal, an acoustic signal can also be output, for example analogous to a color change with a change of a pitch and / or analogous to a blinking with a predetermined sequence of tones.

It is still a development that a power transfer is released after a successful centering. This provides a protective function against unintended objects being heated and / or energized by the magnetic field.

It is also a development that color combinations or sequences of tones, in particular by a user or a service technician, are adjustable, for. For example, the combinations red / green or yellow / blue. This increases user-friendliness.

• – Erkennen einer Größe eines Versatzes zwischen dem Aufsatzgerät und der zugehörigen Basisstation und
• – Ausgeben mindestens eines optischen Signals in Abhängigkeit von der Größe des Versatzes.

The object is also achieved by a method for centering a set-top device on a base station of a domestic operating device which can be coupled thereto in a transformer-like manner, wherein the method has at least the following steps:

• Detecting a size of an offset between the attachment and the associated base station and
• Outputting at least one optical signal as a function of the size of the offset.

It is an embodiment that detecting the size of the offset comprises detecting the offset within an inner region, the inner region comprising the size of the offset r between 0 and s, where s is a first Threshold denotes and the outputting of the at least one optical signal comprises a color change in a transition from or into the inner region.

It is yet an embodiment that the detection of the size of the offset comprises comparing a measured via the base station, removed from the associated attachment device performance with a target power by the household control gear. The target power can z. B. entered by a user or selected or automatically detected by the household control gear. This embodiment has the advantage that it can be carried out even if there is no communication from the attachment device to the household operating device.

It is an alternative or additional embodiment that detecting the amount of offset comprises comparing a level of a data signal transmitted to or from the attachment with a desired data signal level. This configuration, which presupposes an ability to communicate from the attachment device to the household operating device, is comparatively accurate and can also be carried out without a knowledge of a desired performance, etc. Typically, the strength of a transmitter of the attachment device for transmitting the data signal (eg a signal coil) is known. The (nominal) strength of the transmitter of the attachment is preferably the same for many or all attachment devices.

In particular, the invention may comprise in whole or in part the following sequence, which in particular utilizes a set-top device which has a transformer-coupling transmitter (eg a data signal coil) for transmitting data (device data and / or measurement data, etc.) to the domestic operating device:
If the base station is in a standby mode in which the base station is switched off, only one (in particular innermost) emission area of several emission areas may serve as a first positioning aid or centering aid (eg an inner circle or a light spot on the Center of the core) or optionally parts of or all Abstrahlbereiche the centering be illuminated.

If the base station is switched on, all emission areas (eg all circles, crosses, points, etc.) can light up, if they did not already light up in standby mode. If all radiating areas already lit up in standby mode, these can be switched off when the base station is switched on, for example. B. short or for a limited period of time.

In this scenario, the base station does not yet receive any signal from the attachment, since this has not yet been brought to the base station.

If the attachment device introduced to the associated, switched base station, occurs from a certain distance or offset between the base station and the secondary coil of the attachment device, a transformer coupling, which is sufficient for the operation of the attachment device, z. B. from an offset between 3 cm and 5 cm. Thus, a data transmission from the attachment to the household control gear is possible, so that the attachment device can be recognized by the household control gear (eg, by a transmission of device data). Also, the offset detection unit can now calculate the offset. Thereupon the emission areas adjust to a color or blinking frequency which corresponds to the calculated offset, namely (quasi) continuously or in regions. Also, a shape of the attachment device can be shown inversely or approximated, since, in particular after a successful data transmission, a type and a shape (and possibly further properties of the attachment device, such as a data signal strength or level of a transmitter) are known. In this case, in particular the strength or the level of the data signal can be a basis for the color or flashing frequency change of the emission areas.

Sufficient (or practically optimal) centering is achieved, in particular, when a high data signal level is applied by the base station or the attachment. This may in particular be the case with an offset of less than about 1 cm. The sufficient centering is reported back visually and / or acoustically to the user. This can be done by changing the color of the emission areas, switching off or briefly flashing the emission areas etc.

If the attachment is moved in use and leaves it a position of sufficient centering, this can be communicated visually and / or acoustically to the customer.

In the following figures, the invention will be described schematically with reference to exemplary embodiments. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1 shows a system of a household operating device for operating a set-top device by means of transformatory energy transfer and a pot arranged thereon as an attachment device;

2 shows a sketch of a simplified rule structure of the system 1 ;

3 shows a sectional view of the household control gear and the attachment with a structural design of transformer halves of a separable transformer;

4 shows a plan view of a section of a worktop of a household control device according to the invention according to a first embodiment in the region of a base station; and

5 shows a plan view of a section of a worktop of a household control device according to the invention according to a second embodiment in the range of a base station.

1 shows an attachment in the form of a smart pot 101 that represents an electrical consumer. The pot 101 has a basic body 102 with a lid and handles and a trained as a drive unit secondary coil 114 as a power coil on. The pot 101 is to operate on a surface of a countertop 105 a household control gear 106 arranged. Under the worktop 105 is an energy transfer unit 107 assembled. This has a housing 108 with an actuating element 109 for switching on and off the power transmission unit 107 on. Furthermore, the energy transmission unit comprises 107 a base station or primary coil 111 as a power coil and a power generation unit 112 to supply the primary coil 111 with an alternating current. The power generation unit 112 is formed in this embodiment as an inverter. The primary coil 111 is wrapped in the form of a flat spiral winding. During operation of the power transmission unit 107 and the pot 101 becomes the primary coil 111 fed with the alternating current and generates a magnetic alternating field. By means of a field flux of this alternating field transmits the primary coil 111 by induction energy to the secondary coil 114 which attaches to one on the surface of the countertop 105 drawn working zone (energy transfer area) 113a is arranged. At an adjacent work zone 113b no attachment is arranged. The secondary coil 114 is designed as a planar spiral winding. The work zones 113a and 113b are by means of a respective line 115a . 115b on the countertop 105 located. In the secondary coil 114 is induced by the magnetic field flux, a secondary voltage, which is used as operating voltage for operation of the pot 101 is being used. The pot 101 can from the work zone 113 be removed, eliminating the secondary coil 114 from the primary coil 111 is disconnected. To the work zone 113 can then be placed on other attachments, such. As a coffee maker, a mixer, a charger, a fryer, a toaster, a kettle, etc. (also referred to as 'small household appliances'), each having one or more secondary coils and a wireless interaction of the respective secondary coil with the primary coil 111 ("Transformer coupling") receive an operating power.

In the worktop 105 is also a control panel in the form of a touch-sensitive screen 104 let in, on the display elements and actuators are freely programmable. The touch-sensitive screen 104 For example, it may be a liquid crystal or LED screen that is covered by a touch-sensitive film, e.g. As an ITO film is covered. As a result, a large number of different actuation elements, such as push buttons, circular sliders, linear sliders, can be displayed essentially as desired on the control panel, which allows a very flexible user guidance. Using the control panel 104 especially the two working zones 113a and 113b be controlled independently of each other, for. B. activated (turned on) and deactivated (turned off) and operating parameters arranged there attachment device 101 be set. Also, an operation of a respective attachment device 101 to be started.

The pot 101 is with an integrated circuit 116 equipped to process data and output data to a transmitter. To an input of the integrated circuit 116 is a temperature sensor 127 to determine a temperature on the pot 116 connected. The integrated circuit 116 feels the temperature sensor 127 cyclically processes the sensed temperature signals into a predetermined data and protocol structure and transmits the thus processed temperature data to a transmitter. The transmitter has a modulator and a downstream transmit signal coil (not shown). As a transmission signal coil here is one of the secondary coil 114 separate signal winding. The data signals radiated from the transmission signal coil are received by a reception signal coil of the household control gear 106 recorded (not shown), in a not shown demodulator of the household control gear 106 demodulated and sent to a control unit 110 of the household control gear 106 forwarded. Among other things by means of the temperature data controls or regulates the control unit ("stove electronics") 110 which here includes a microcontroller, the power generation unit 112 ,

Although only two work zones are on the household control gear 113a . 113b shown, but also fewer or more work zones are feasible, in particular four or five work zones.

2 shows a sketch of a simplified rule structure of a system from a smart pot 201 and a household control gear 206 ,

The smart pot 201 has a basic body 202 on that through a pot bottom 220 is completed down, and in the food 221 can be filled. At a bottom of the pot bottom 220 runs a heating track 222 in the form of an entangled resistance thick-film web, which is heated when energized and so the bottom of the pot 220 for heating the food 221 warms up. Their power supply is the heating track 222 with a secondary coil 214 connected in the form of a spiral-shaped secondary winding and represents their load. From the secondary coil 214 is also an electrical power to power a pot electronics 223 diverted. For this purpose, the pot electronics 223 a switching regulator 224 on which of the secondary coil 214 output power voltage converted into a low-voltage DC voltage. By means of the low voltage DC voltage, the remaining parts of the pot electronics 223 operated, of which here an analog measuring electronics 225 , an integrated circuit 216 and a modulator 226 are drawn. By means of the analog measuring electronics 225 be measuring signals from various sensors of the pot 201 sensed. For ease of illustration here are only three at the bottom of the pot bottom 220 attached temperature sensors 227 However, other sensors can also be used with the analog measuring electronics 225 be connected, z. B. pressure sensors or humidity sensors. Furthermore, directly at a measuring input of the analog measuring electronics 225 a self-temperature sensor 217 available. This therefore measures the temperature in the area of this measuring input of the analog measuring electronics 225 ; because the pot electronics 223 comparatively compact housed on a common board (not shown), the temperature at this measuring input as well as representative of the temperature at the integrated circuit 216 considered.

The analog measuring electronics 225 is the output side with an input side of the integrated circuit 216 connected so that temperature data from the analog measuring electronics 225 to the integrated circuit 216 forwarded to the following processing. For processing of the measuring electronics 225 Analog transmitted temperature data has the integrated circuit 216 an A / D converter (not shown). In the integrated circuit 216 are those of the analog measuring electronics 225 supplied digital "raw data" in a for communication with the household control gear 206 compatible format reformatted. In particular, raw data is converted to a predetermined data format and protocol format. The formatted measurement data are from the integrated circuit 216 then cyclically, z. B. every 10 ms, to the modulator 226 where they are modulated onto a carrier signal and then from the modulator 226 via a signal coil 228 to the household control gear 206 to be transmitted. The signal coil 228 is here as a parallel to the bottom of the pot 220 running signal winding configured. But there may be other measurement data from the integrated circuit 216 processed and sent to the modulator 226 be forwarded, such as a measurement signal of a secondary-side power voltage. It also allows other data from the integrated circuit 216 processed and sent to the modulator 226 be forwarded, such as identification data (identity code, etc.) and operating data, cyclically or - in a bidirectional communication - on query. The household control gear 206 has a reception signal coil 229 which is likewise designed as a signal winding, which essentially corresponds to the signal winding of the transmission signal coil 228 of the pot 201 opposite. The received signal coil 229 receives this from the transmit signal coil 228 radiated modulated carrier signal and passes it to a demodulator 230 Next, in which the data modulated onto the carrier signal is extracted and output again as readable digital data. Thus, now both are of the analog measuring electronics 225 sensed data as well as that of the integrated circuit 216 supplied identification data and operating data in the household control gear 206 in front. These data are stored in a control unit ("stove electronics") 210 processed and used to operate the pot 201 evaluated. Due to the coil-like design and opposite arrangement of transmission signal coil 228 and receiving signal coil 229 a near field data transmission is achieved which does not radiate significantly laterally and thus is not picked up by other receivers at other work zones. This prevents crosstalk and a clear assignment of pot 201 and household control gear 206 only because of the data transmission as such and without any other means.

So can those of the pot 201 emitted temperature data in the form of resistance values of the temperature sensors used, if they are designed as resistance temperature sensors. This can be in the control unit 210 by looking up corresponding resistance / temperature characteristics in a look-up table, the actual temperature at the bottom of the pot bottom 220 be determined and derived from the Garguttemperatur. For example, the temperature at the bottom of the bottom of the pot 220 be equated with the cooking temperature, or it may be added to an empirically determined temperature difference, which may also be dependent on the height of the measured temperature. The control unit 210 also receives inputs from a control panel 204 For example, about a target cooking temperature for a temperature control For this purpose, an operator has previously set the desired cooking temperature on the control panel 204 set directly or via a cooking program. From the control panel 204 For example, unnoticed by the operator, other control variables such as PID coefficients can also be sent to the control unit. In the control unit 210 For example, in the case of a temperature control, a control deviation between desired cooking temperature and actual cooking temperature can be determined, as well as a manipulated variable of the control loop, from which in turn a control voltage for controlling a power generation unit 212 is calculated and output in the form of power electronics. The control voltage is here in a range between 0 V (switched off) and 4 V (maximum). This is between the control unit 210 and the power generation unit 212 a digital / analog converter 231 inserted. By means of the power generation unit 212 becomes a base station or primary coil 211 operated in the form of a spiral-shaped power winding, as already with respect to 1 has been executed. The power generation unit 212 creates one on the primary coil 211 applied AC power voltage, here for example between 10 VAC and 230 VAC at a frequency between 100 KHz and 400 KHz. The primary coil 211 generates as alternating field an alternating magnetic field, which in turn from the secondary coil 214 is recorded. In other words, results between the primary coil 211 and the secondary coil 214 an induction-based energy transfer ("transformer coupling").

Is the pot 201 on the household control gear 206 put on, for example, the in 1 illustrated work zone 113a the worktop 105 , can take energy from the household control gear 206 on the pot 201 and data signals from the pot 201 on the household control gear 206 be transmitted. Due to the transformer or inductive coupling between the primary coil 211 and secondary coil 214 However, the energy transfer is only in a near field of the primary coil 211 to operate the pot 201 possible. Typical maximum vertical distances (along the z-extension) between household control gear 206 and pot 201 here are between 0.3 mm and 3 mm. A maximum offset in r-extent from a centered position is here up to 3 cm. Will the pot 201 further from the primary coil 211 removed, the transmitted power is no longer sufficient for the operation of the pot 201 out. Then the transmitted energy is no longer sufficient for the operation of the pot electronics 223 which then ceases to operate. The on the pot 201 for data transmission, including for operation of the pot electronics 223 , required power is less than 5 W, advantageously not more than 3 W. An interruption of the data transmission is considered removing the pot 201 from the household control gear 206 interpreted.

At an approach of the pot 201 to a household control gear 206 This can be returned to the near field of the primary coil 211 enter and thus be re-energized. In this case sends the pot electronics 223 again signals via the transmitter 226 . 228 out, which from the household control gear 206 be recognized. A data transfer is called putting on the pot 201 on the household control gear 206 interpreted.

3 shows in a sectional view of the household control gear 306 which is the power generation unit 312 , the regulatory unit 310 and the base station or primary coil 311 and also shows the smart pot 301 with the secondary coil 314 and the heating track 322 , For a clearer view, the low-voltage range of the intelligent pot 301 with pot electronics, sensors, etc. as load not shown. The primary coil 311 is in a circular recess 332 an iron core (especially ferrite core) 333 of the household operating device 306 arranged, which serves, one of the primary coil 311 strengthen field strength generated. In the pot 301 is another iron core (especially ferrite core) 334 to see, which also has a circular recess 335 in which the secondary coil 314 is arranged. The iron core 334 with the secondary coil 314 (secondary transformer half) is from the iron core 333 with the primary coil 311 (primary transformer half) separable, as indicated schematically by an arrow P. The working surface of the worktop 305 is shown schematically by a dashed line. The primary coil 311 is in the form of a spiral coil (see also 1 ) in a power development level 336 wound. The secondary coil 314 is also in the form of a spiral coil in a power winding plane 337 wound. The secondary coil 314 and the primary coil 311 have the same number of windings, here five.

In the primary-side recess 332 the primary iron core 333 is outside with respect to the primary coil 311 a single signal turn 338 a primary-side signal coil 329 arranged. This thus rotates on the outside the plane primary-side power coil 311 , The signal winding 338 is on an outer sidewall 339 the recess 332 attached. The power development level 336 and the signal winding plane thus coincide. Analog is in the recess 335 of the secondary iron core 334 on the outside with respect to the secondary-side power coil 314 a single signal turn 341 a secondary-side signal coil 328 arranged. This thus rotates on the outside of the flat secondary-side power coil 314 , Also the signal winding 341 is on an outer sidewall 342 the secondary-side recess 335 attached. The power development level 337 and the signal winding plane thus also coincide. The signal turns 338 . 341 Both are operated at a frequency of 4 MHz or above, preferably at about 32 MHz, while the power coils 311 . 314 with a frequency of not more than 400 KHz. The conductors of the signal windings 338 . 341 are made of HF strand 30 × 0.05, the conductors of the power coils 311 . 314 are wound from HF strand 840 × 0.07. The primary-side windings 311 and 338 are in the primary-side recess 332 potted with resin or plastic; as are the secondary windings 314 and 341 in the secondary-side recess 335 potted with resin or plastic.

By installing the transformer halves (primary coil 311 and primary-side coil core 333 or secondary coil 311 and secondary-side coil core 334 ) in a horizontal arrangement, the field direction is perpendicular between them, which causes only minimal emissions (EMC).

4 shows a plan view of a section of a household control gear 406 in the area of a base station 411 , The edge contour of the base station 411 is indicated by dashed lines. The base station 411 is of a worktop in the form of a translucent glass ceramic plate 405 covered. The glass ceramic plate 405 is locally illuminated from below at two radiation areas by light, at one with respect to the base station 411 centrally arranged cross-shaped first emission area 407 and one concentric to and outside the base station 411 extending annular second radiation area 408 , For example, corresponding light guides (not shown) up to the glass ceramic plate 405 be introduced so that the light emitted by them through the glass ceramic plate 405 to the surface of which radiates. The surface is thus consistent and easy to clean. The glass ceramic plate 405 can be transparent or colored. The two emission areas 407 . 408 are independently activatable.

Is the base station 411 in its standby mode, only the first emission area is illuminated.

Will the base station 411 turned on by a user, the second radiation area 408 switched on, and thus shine both Abstrahlbereiche 407 . 408 on, in a same, predefined color. The base station 411 does not receive any signal from the attachment (eg 101 . 201 . 301 ), as this is not yet to the base station 411 has been introduced.

Is an attachment to the base station 411 introduced so that their offset r is less than about three to five inches, there is a transformer coupling between the base station 411 and the attachment, which is sufficient for the operation of the attachment device. Following are data by means of transformer coupling from the attachment to the household control gear 406 transmitted, so that the attachment of the household control gear 406 is recognized (eg by transmission of a device identifier, nominal power, transmitter strength, etc.). The offset r is also calculated by means of the signal level of the data signal. Thereupon the two emission areas are set 407 . 408 to a color which corresponds to the calculated offset r, in some areas. This means here that when the offset r is greater than about 1 cm, the two emission areas 407 . 408 Red light and switch to a green glow with an offset of about 1 cm or less. The range of the offset r equal to or less than 1 cm may also be considered as an inner region 409 be designated. The inner area 409 points one to the middle of the base station 411 centered circular shape with a diameter of about 1 cm. The color change shows the user sufficient centering. For color switching to the radiation areas 407 . 408 leading or generating these optical fibers with different colors (at least red / green) radiating light sources be coupled, or with an optional multi-colored radiating light source or with a light source with different color filters, etc.

If the attachment is moved more than 1 cm from its central position in use (with the middle of the secondary coil out of the inner area) 409 shifted out), this can be communicated to the user by a new color change, now again red, visually.

If the attachment is placed directly within an inner area with a radius of about 1 cm, both attachment areas 407 . 408 immediately turn green.

5 shows in plan view a section of a household control gear 506 according to a second embodiment in the area of a base station 411 , The household control gear 506 also shows a first, central, cross-shaped radiating area 407 , Instead of the annular radiation area 408 has the household control gear 506 via cross-shaped (at right angles) to each other arranged rows of third, cross-shaped radiating areas 508 , Here, the (non-central) cross-shaped radiation areas 508 as a group together analogous to the second emission range 408 to be activated. Alternatively, z. B. only those cross-shaped Abstrahlbereiche 508 to shine, which are outside a diameter of the centered attachment (eg. 101 . 201 . 301 ), which facilitates centering. The diameter can for example automatically from the attachment to the household control gear 506 be transferred and taken into account in the lighting.

Of course, the present invention is not limited to the embodiments shown.

LIST OF REFERENCE NUMBERS

101

smart pot

102

body

104

Control panel

105

countertop

106

control gear

107

Power transmission unit

108

casing

109

actuator

110

control unit

111

Base station or primary coil

112

power generation unit

113

work zone

113a

work zone

113b

work zone

114

secondary coil

115a

line

115b

line

116

integrated circuit

201

smart pot

202

body

204

Control panel

206

control gear

210

control unit

211

primary coil

212

power generation unit

214

secondary coil

216

integrated circuit

217

Own temperature sensor

220

pot base

221

be cooked

222

heating track

223

pot electronics

224

switching regulators

225

analog measuring electronics

226

modulator

227

temperature sensor

228

Transmission signal coil

229

Reception signal coil

230

demodulator

231

D / A converter

301

smart pot

305

countertop

306

control gear

310

control unit

311

primary coil

312

power generation unit

314

secondary coil

322

heating track

328

secondary-side signal coil

329

primary-side signal coil

332

primary-side recess

333

primary-side iron core

334

secondary iron core

335

secondary-side recess

336

the winding plane

337

the winding plane

338

Sign gyrus

339

outer sidewall

341

Sign gyrus

342

outer sidewall

405

Glass ceramic plate

406

Household work equipment

407

radiation area

408

radiation area

409

inner area

411

base station

506

Household work equipment

508

radiation area

P

arrow

r

offset

V _B

secondary voltage

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 10343011 A1 [0002]
• DE 102005022352 A1 [0002]
• DE 102006017800 A1 [0002]
• DE 102006017801 A1 [0002]
• DE 102008054904 A1 [0003]

Claims (10)

Household operating device ( 406 ; 506 ), comprising at least one base station ( 411 ) for transformatively operating a top-mounted device ( 101 ; 201 ; 301 ), characterized in that the household operating device ( 406 ; 506 ) an offset detection device ( 110 ; 210 ; 310 ) for detecting an offset (r) between one of the at least one base station ( 411 ) and the associated attachment ( 101 ; 201 ; 301 ) and the household operating device ( 406 ; 506 ) is adapted, depending on a size of the by the offset detection means ( 110 ; 210 ; 310 ) offset (s) to this base station ( 411 ) output acousto-optical signal. Household operating device ( 406 ; 506 ) according to claim 1, characterized in that the household operating device ( 406 ; 506 ) a top side worktop ( 405 ) and at least one of the base stations ( 411 ) a fixed localized optical radiation area ( 407 ; 408 ; 508 ) for outputting the associated optical signal to a surface of the worktop ( 405 ), in particular at least one rotationally symmetrical to a center of the associated base station ( 411 ) designed radiation area ( 407 ; 408 ; 508 ). Household operating device ( 406 ; 506 ) according to one of the preceding claims, characterized in that the worktop ( 405 ) at least at the at least one optical radiation area ( 407 ; 408 ; 508 ) is translucent and the household control gear ( 406 ; 506 ) has at least one light source whose light is detected as the optical signal at at least one localized emission area ( 407 ; 408 ; 508 ) a surface of the worktop ( 405 ) is radiatable. Household operating device ( 406 ; 506 ) according to one of the preceding claims, characterized in that the household operating device ( 406 ; 506 ) is adapted to receive an optical signal having a size that is greater than that of the offset detection means ( 110 ; 210 ; 310 ) detected offset (r) dependent color output. Household operating device ( 406 ; 506 ) according to one of the preceding claims, characterized in that the household operating device ( 406 ; 506 ) is set up when the base station is switched on ( 411 ) the associated at least one emission area ( 407 ; 408 ; 508 ) to activate. Household operating device ( 406 ; 506 ) according to one of the preceding claims, characterized in that the household operating device ( 406 ; 506 ) a pot detection ( 110 ; 210 ; 310 ) for detecting an attachment ( 101 . 201 ; 301 ) at an associated base station ( 411 ) and is adapted to, in a recognized attachment ( 101 . 201 ; 301 ) that to this base station ( 411 ) to change associated optical signal. Method for centering an attachment ( 101 . 201 ; 301 ) on a base station ( 411 ) of a domestic operating device ( 406 ; 506 ), characterized in that the method comprises at least the following steps: detecting a size of an offset (r) between the attachment ( 101 . 201 ; 301 ) and the associated base station ( 411 ) and - outputting at least one optical and / or acoustic signal as a function of the size of the offset (r). A method according to claim 7, characterized in that the detection of the size of the offset (r) is a recognition of the offset (r) within an inner region ( 409 ), wherein the inner region ( 409 ) comprises the size of the offset (r) between 0 and s, where s denotes a first threshold value and the outputting of the at least one optical signal comprises a color change during a transition from or into the inner region. Method according to one of claims 7 or 8, characterized in that the detection of the size of the offset (r) is a comparison of the base station ( 411 ) measured by the associated attachment ( 101 ; 201 ; 302 ) with a nominal power through the household operating device ( 406 ; 506 ). Method according to one of claims 7 to 9, characterized in that the detection of the size of the offset (r), a comparison of a level of a to the or of the attachment device ( 101 ; 201 ; 301 ) comprises a transmitted data signal having a desired signal level.

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