EP1486733A2 - Cooking oven device - Google Patents

Abstract

Cooking oven comprises an electrical heater, operating elements, on-off switch and an electronic clock. A display panel (12) incorporates the electronic clock (10) and has at least two presentation icons (11, 13, 15) for a similar number of operating modes. The icons are controlled by the clock control unit, dependent on the current switch settings of the oven operating elements so that an illuminated icon indicates a particular operating mode.

Description

The invention relates to an oven device containing an electric heating device, Controls for switching the heating device on and off and for switching on each one of two or more operating modes, a mechanical temperature controller and an electronic clock for setting a desired heating duration, the clock on Display panel for electronic time display and an electronic control device for Control of the display panel has.

This is an oven device that is not electronic Control circuit for the heater contains, but only the heater is manually adjustable and the temperature is not electronically, but by one mechanical temperature controller is monitored. It is with such oven devices known, the switch-on state of the oven device by a glow lamp or Display light emitting diode. Furthermore, it is simple with such Devices known to provide the front with a fixed font by which the respective setting position of a control element (knob) is displayed. Of the the only convenience of such an oven device is often that a electronic clock to display the time of day and / or to display the remaining time of a set heating duration is provided. Such oven devices are essential cheaper than oven devices, which are electronic, computerized Have control device for controlling the heating device.

Household appliances, such as an oven, with an electronic Control devices for controlling the oven heating are from DE 198 32 757 C2 known. There it is pointed out that in many technical fields Operation of devices is known, program-controlled in each case on certain Display fields of a graphic, i.e. H. pixel oriented, pixel display device, such as a screen of a cathode ray monitor, a liquid crystal (LCD) screen, a light-emitting diode (LED) screen or a vacuum fluorescent screen (VFD), display selectable commands or functions and either by pressing (Press) the display fields themselves (touch screen) or from next to the Buttons or touch sensors (piezoelectric, capacitive, optical).

From Patent Abstracts of Japan, publication number 63058368 A, application number 61202556, a display device is known for business facilities, which a Dot matrix display part and a numeric and symbol display part contains. The latter includes a 7-segment display for copy enlargement, a 7-segment display for the number of copies, and icon groups to indicate the size and direction of Sheets of paper. Patent Abstracts of Japan, publication number 57125876 A, Application number 56012363, shows an electronic watch with a dot matrix part Display of days of the week and date, and a 7-segment display part for time display. Patent Abstracts of Japan, publication number 05-027529, application number 03-203580, shows a display device for copying machines with a dot matrix part, a numerical and a symbol part for displaying copy information. Control devices for 7-segment display devices show the US 4,270,846 and US 4,994,941.

The object of the invention is to solve the problem of oven devices at the beginning mentioned simple type, which no electronic control device for controlling the Have heating device, but only at least one mechanical Temperature controller, technically and in terms of their visual impression of high quality design without incurring high costs as for the electronically controlled Oven appliances are created.

This object is achieved according to the invention in that in the display panel electronic watch at least two presentation images for an equal number of Operating modes are integrated, which are controlled by the control device of the electric clock Dependence on the respective switching state of the control elements of the heating device can be controlled for the electrically illuminated display when the relevant operating mode is switched on.

The invention uses the electronic control device of the watch not only for Clock functions, but also for displaying functions of the Heating device without the heating device an electronic control device needed.

Further features of the invention are contained in the subclaims.

The invention has the following advantages: low costs for the oven device and low Costs for the visual display of different operating modes; technical and optical enhancement of the impression of the oven device in the direction of Oven appliances with fully electronic heating control devices; more opportunities for that Design of the switch front of the oven device; higher quality of the device lower number of components.

Fig. 1

schematisch und verkleinert die Frontansicht eines Backofengerätes nach der Erfindung,

Fig. 2

ein Displaypanel nach der Erfindung in einer relativ zu Fig. 1 vergrößerten Darstellung,

Fig. 3

schematisch ein Blockschaltbild von Teilen des Backofengerätes nach der Erfindung.

The invention is described below with reference to the drawings attached here using a preferred embodiment as an example. Show in the drawings

Fig. 1

schematically and reduced the front view of an oven device according to the invention,

Fig. 2

2 shows a display panel according to the invention in an enlarged view relative to FIG. 1,

Fig. 3

schematically shows a block diagram of parts of the oven device according to the invention.

The oven device 1 contains an electric heating device 2 with at least one electric heating element 2-1 and / or 2-2 for heating a baking space 3 in Dependence on the on / off state of at least one control element 4 (e.g. Gag) of the heating device 2. The baking chamber 3 can be closed by a door 5. The Heating device 2 also contains at least one mechanical temperature controller 8, which limits the heat in the baking chamber 3. On an electronic watch 10 can be a desired duration for at least one further clock control element 9 Different types of heating (operating modes) of the heating device 2 can be set. To be there- and switching off the oven device is preferably carried out on the same Operating elements 4, on which also the different operating modes (types of heating) are adjustable, e.g. B. top heat, bottom heat, top and bottom heat, each with or without Air circulation fan, grilling, etc.

The electronic clock 10 contains a display panel 12 for the electronic time display 14 and an electronic control device 16 for controlling the display panel 12. Die Time display 14 shows the heating time set on the clock 10 or after Setting a heating time each remaining time for heating the Baking room 3. The clock 10 can additionally be designed such that it is additionally or as an alternative to the heating time, the time of day can also be displayed.

In the display panel 12 are for at least two, for. B. for three, different Operating modes Presentation pictures in the form of unchangeable text and / or preferably unchangeable pictograms 11, 13 and 15 (operating mode pictograms) integrated, which depends on the control device 16 of the clock 10 can be controlled by an operating mode set on one of the control elements 4 are for the illuminated display of the operating mode that is currently switched on. Fig. 2 shows z. B. a Pictogram 11 for grilling on a wire rack, pictogram 13 for defrosting food in the oven Baking chamber and a pictogram 15 for rapid heating of the baking chamber.

In addition, a pictogram 18 (function pictogram) can be placed in the display panel 12 of the clock 10. be integrated, which is only ever from the control device 16 Clock 10 is activated only to light up when the Heating device 2 on one of the controls 4, a circuit 20 of at least a heating element 2-1 and / or 2-2 of the heating device 2 is closed and thereby electrical current flows through the heating element.

According to a preferred embodiment of the invention, which shows Fig. 3, is a Connection 21 of the electronic control device 16 of the clock 10 with the at least a circuit 20 of the heating device 2 via an electrical connection 22 to one Point 24 connected, at which an electrical minimum voltage always, but only then is present when the circuit 20 is closed. If this minimum voltage is present the pictogram 18 is controlled by the control device 16 of the electronic clock 10 illuminated. However, the pictogram 18 is not displayed when the circuit 20 is interrupted.

In the electrical connection 22 there is preferably a voltage reducer 26, for example in the form of a voltage divider, arranged so that not the full Mains voltage of the heating device 2 to the electronic control device 16 of the clock 10 arrives, but a much lower voltage.

The control device 16 of the clock 10 receives its supply voltage via a Transformer 28 of electrical lines 30, 32, with which on the Controls 4, the heater 2 is electrically connectable, and which one Power supply network can be connected.

The display panel 12 of the watch is preferably with 7-segment technology for time display trained, the seven segments of the electronic Control device 16 of the clock can be controlled differently depending on the time to be displayed are.

The pictogram 18 is an unchangeable symbol which is different from the electronic one Control device 16 of the clock can be switched on in an electrically lit manner or not illuminated can be switched off.

The display panel 12 is preferably designed in liquid crystal technology, both for the 7-segment display as well as for the display of pictograms 18, 11, 13 and 15. Others Possible techniques for implementing the display panel 12 are light-emitting diode technology (LED) and vacuum fluorescence technology (VFD). There is also the possibility that Training display panel 12 in two different techniques and by the To control control device 16 of the clock, the one technique for displaying the Pictograms 18, 11, 13 and 15 and the other technique for displaying the time 14 is used.

Fig. 3 shows schematically part of the electrical circuit of the oven device. The Control element 4 for the heating device 2 contains an actuable by it Switch arrangement 34 for communicating the respective switch position, which in each case is one corresponds to the specific operating mode, to the electronic control device 16 electronic clock 10. Furthermore, the control element 4 contains at least one of them actuatable switch 36 in the heating element circuit 20 in series at least a heating element 2-1 (and / or 2-2) of the heating device 2. The circuit 20 is connected to the two electrical lines 30 and 32. In it is in Row to the electrical heating element 2-1 and the switches 36 of the control element 4 also the temperature controller 8 to interrupt the line path when exceeded a certain maximum temperature in the baking chamber 3, and a timer 42 for Interruption of the circuit 20 whenever a clock 10 is set Operating time has expired. This enables a switching state in which the Control element 4 of the heating element 2-1 is switched on and thus the Oven device is switched on, but the heating element 2-1 still no power gets because the temperature controller 8 and / or the timer 42 is open.

The operating mode that is switched on can be controlled by the control device 16 of the clock 10 respective switch position of switches 34-1, 34-2, 34-3 and 34-4 (etc. 34-n) the Recognize switch arrangement 34 of control elements 4. An electrical line 50 transmits signals, e.g. B. digital signals from the control device 16 of the clock 10 to the Switches 34-1, 34-2, 34-3 and 34-4 (34-n).

Depending on the operating mode set on the control element 4 one (or are a specific combination) of switches 34-1 through 34-4 of Switch assembly 34 closed and others open so that the signal on line 50 transmitted back from the switch arrangement 34 to the control device 16 of the clock 10 is via at least one of the return lines 51, 52, 53 or 54. For this, the standard control device 16 of the clock 10 only with the required connections 60, 61, 62, 63, 64, e.g. With Digit connections. This is just one example of a preferred embodiment. Further Embodiments are possible to 10 different using the watch Operating modes.

Claims (7)

Oven device, comprising an electric heating device (2), operating elements (4) for switching the heating device (2) on and off and for switching on one of two or more operating modes, a mechanical temperature controller (8) and an electronic clock (10) for setting a desired heating duration, the clock (10) having a display panel (12) for electronic time display (14) and an electronic control device (16) for controlling the display panel (12), characterized in that the display panel (12) of the electronic clock (10) at least two presentation pictures (11, 13, 15) for an equal number of operating modes are integrated, which are controlled by the control device (16) of the electric clock (10) depending on the respective switching state of the operating elements (4) of the heating device (2 ) can be controlled for an electrically illuminated display when the relevant operating mode is switched on. Oven device according to claim 1, characterized in that a pictogram (18) is integrated in the display panel (12) of the electronic clock (10) and can be controlled by the electronic control device (16) of the clock depending on the functional state of the heating device (2) to indicate in an electrically lit manner when at least one heating element circuit (20) of the heating device (2) is closed and thereby at least one heating element is switched on, but the pictogram is not displayed if no heating element circuit is closed. Oven device according to claim 2, characterized in that the electronic control device (16) of the clock (10) has a connection (21) which is electrically connected to a point (24) of the heating element circuit (20) via an electrical connection (22) which is connected in series with at least one heating element (2-1) in order to tap an electrical voltage at this point (24) which is characteristic of the states open or closed of this heating element circuit (20). Oven device according to claim 3, characterized in that a voltage reducer (26) is arranged in the electrical connection (22) to reduce the electrical voltage which reaches the control device (16) of the clock (10). Oven device according to one of the preceding claims, characterized in that the clock (10) is designed for time display by means of a 7-segment technology in the display panel (12). Oven device according to one of the preceding claims, characterized in that the display panel (12) is designed in liquid crystal technology (LCD), light-emitting diode technology (LED) or vacuum fluorescence technology (VFD). Oven appliance according to one of the preceding claims, characterized in that the presentation images (11, 13, 15) are pictograms for displaying the operating mode which is currently switched on.

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