DE2731970B2 - Control arrangement for the display panel of an electronic stove timer - Google Patents

Description

The invention relates to a control arrangement for

, the display panel of an electronic stove timer with a multi-digit electronic digital display for Representation of the current time and / or other data and with an actuating element that can be rotated activatable pulse generator for adjusting the

ι digital display.

An electronic watch having an electronic digital display and display setting means of the above Art is known from DE-OS 25 40 486 In addition, through various publications, for example DE-OS 15 65 816, DE-OS 15 40 842 and DE-OS 24 05 974 mechanical or electromechanical Control devices for stove clocks known, in addition to a digital time display, several mechanical display means such as movable number scales

'len or rollers or rotatable relative to scales Pointer (DE-OS 24 05 974) for cooking or frying start and finish and for temperature and weight of the Have food to be fried. These mechanical display means are via mechanical elements and means Manually adjustable knobs.

It can be seen that as the number of functions to be fulfilled by a stove clock, the number of mechanical individual elements required increases significantly, which usually results in not inconsiderable increases in manufacturing costs result. One will therefore always endeavor to keep the production costs within acceptable limits and, if a stove clock and its desired functions are not with mechanical means within of the staked manufacturing cost framework is realizable, for the realization of the specified Functions use other, less costly means.

For example, an electronic stove timer has already been proposed (patent application P 26 31 590.2), in which the entry of the relevant data for the stove timer by means of a rotatable Pulse generator takes place.

In contrast, it is the task of the invention to provide one with an automatic control for the roasting process equipped electronic stove timer with particularly simple, inexpensive to manufacture and expedient Devices for setting and displaying the

to provide relevant data for the automatic roasting.

This object is achieved by an object according to the features specified in claim 1

The basic idea of the invention is thus that the rotatable pulse generator data for the temperature and the roasting time of the food to be roasted can be entered, each with one of these Light point assigned to data, which may have a corresponding symbol, lights up on this Way, the operator can use the light; o points both during the setting and later see very quickly during the roasting process, what data have been entered without, above all the data entered during cooking the display, which in normal operation only shows the current 1 ~> time, by pressing a button.

Further advantageous embodiments of the invention are characterized in the subclaims

In the following, the invention will be described in more detail with reference to the drawing using an exemplary embodiment > be explained. It shows

F i g. 1 an embodiment of a rotatable pulse generator known per se;

2 shows a view of the control panel of a electronic stove timer with automatic roasting;

F i g. 3 shows a possible embodiment of the control arrangement for the display panel according to FIG. 2.

In Fig. 1 is a pulse generator for generating setting pulses for a display with 1 designated, the 'in connection with the following described «1 control arrangement for an electronic stove timer Is used and in which a pulse wheel 2 made of insulating material, primarily abrasion-resistant Plastic, consists, in the body of an electrically conductive contact ring 3 with a plurality of η on it A star-shaped, electrically conductive contact lamellae 4 is formed in this contact lamellae are guided radially outward to the smooth peripheral surface of the pulse wheel 2 and there with their outer Cross-sectional areas designed as contact areas 5 for generating pulses As a sensing element here a contact spring 6 resting on the smooth circumferential surface of the pulse wheel 2 is provided, at whose tap 6a the contact surfaces of the pulse wheel can slide past without bouncing when it is rotated. This contact spring 6 and a contact spring 7 sliding on the contact ring 3, via which an electrical Circuit for an impulse can be closed are designed as leaf springs clamped on one side, whose Ends are connected to a pulse shaper 8. The w pulse shaper 8 is followed by a signal path switch 9 which is in connection with a switching device 10 for up and down counting pulses. This device has an arm 11, which has a coupling which is not explained in detail a switching disk 12 is connected to the pulse wheel. Depending on the direction of rotation of the pulse wheel 2 is located the arm 11 to a contact 10a or a contact 10ύ of the switching device 10 and transmits the Forward and backward pulses from the pulse wheel to mi the one or the other contact with 13 finally denotes a detent spring, which in a Rat toothing 14 engages the pulse wheel 2

In Fig. 2 shows the control panel of an electronic stove timer with automatic roasting, with wel- t> ~> rather two rows of small light fields 15 and 16 arranged side by side and individually illuminable are available, which have different symbols.

The upper line 15 contains the first letters of different types of meat, namely veal, poultry, pork and beef, the lower line 16 contains weight information for the roast from 0.5 to 2 ^ 5 kilograms. Next to this light field there is an actuation button »BA« for switching on the automatic roasting system, below the light area an actuation button »T« and an actuation button »D« for selecting the corresponding line 15 or 16 of the light field. The symbolism is chosen so that the different types of meat are assigned to different roasting temperatures, namely veal the lowest and beef the highest roasting temperature. Furthermore, different weights of the food to be roasted are assigned different roasting times. This symbolism is the result of extensive roasting experiments, with soft it has been shown that different types of meat require different roasting temperatures and different meat weights require different roasting times. In the present case, when the “T” button is pressed in the device, temperatures are set on the light field, however, the assigned types of meat are displayed. The same is true when the “D” button is pressed, whereby different roasting times are selected in the device, while different weights are displayed on the light field.

On the control panel of the electronic stove timer is also a digital display 17, for. B. an LED display is provided. The current time is shown on this display with hours and minutes. When the button »7V« · or »D« is pressed, the time disappears and the display shows the temperature in degrees Celsius or the roasting time in hours and minutes.

Finally, a rotatable pulse generator 18 is provided as shown in FIG. 1 was explained. This pulse generator can be used to set the time on the one hand, and the temperature or roasting duration can be set on the display by pressing the »T« or »D« buttons. It is provided that when the temperature or the roasting time is set, that symbol lights up on the luminous field lines 15 to 16 which is associated with the temperature set on the display 17 or the duration set there. For example, the symbol lights up when a temperature of 140 ° is set K for veal on the light field line 15. If you continue to turn the temperature display and set a temperature of z. B. 180 ° the symbol "S" of the light field line 15 lights up. A corresponding mode of operation is obtained by pressing button »D« and setting z. B. a roasting time of IV2 hours. In this case, the symbol 0.5 lights up on the lower light field line 16 for a quantity of meat of 0.5 kilograms. As the pulse generator 18 continues to rotate, the other symbols in the light field line 16 light up one after the other.

Although roast is always mentioned in the above and below, there is of course also one Control of a baking or a keeping process possible.

The mode of operation of the control for the light field of an electronic oven timer with automatic roasting, which is only shown schematically in FIG. 2, is to be illustrated in more detail with reference to FIG. The rotatable pulse generator 18 is followed by an input selector switch 19, which of the types already shown in FIG. 2 operating buttons »7V (and » D «) can be toggled

can and sends its input signal either to the output "T" or to the output "D" . An electronic clock 20, which is synchronized by the network, is connected to the "U" output of the input selector switch. Since such clocks are already well known, a more detailed explanation is dispensed with at this point. The "T" output of the input selector switch 19 is followed by a counter which counts the bits generated by the pulse generator 18 and is used to store the entered temperature values. The output "D" of the input selector switch 19 is followed by a counter 22 which counts the bits entered for the roasting time and saves them in minute values

The output of the counter 21 is followed by a decoder 23, which is programmable by a Logic matrix is formed Such a matrix is available as a commercially available component under the designation JM 5200FPLA available. Instead of such a logic matrix, however, it would also be possible to use a ROM memory to use as a decoder. This decoder gives the entered data only in a predetermined Value range, in the present case only temperature values in the range between 140 ° and 190 °. To the Decoder 23 closes the already based on FIG. 2 explained light field line 15, which refers to several small luminous fields that carry symbols for different types of meat. At the output of the counter 22 This is followed by a decoder 24 similar to the structure of the decoder 23, at the outputs of which the second Light field line 16 is connected which carries symbols for the different meat weights.

The electronic clock and the counters 21 and 22 are connected to the digital display 17 via three AND gates 25, 26 and 27 and an OR gate 28. The actuation button "BA", which has also already been shown on the basis of FIG. 2 was briefly explained, can be connected to the decodes 23 and 24 depending on the intended design of the control arrangement; however, as will be explained below, this connection can also be omitted. One or more lamps 29 are also connected to the actuation button “BA” , which lamps are used to switch on a background lighting for the luminous field lines 15 and / or 16 when the actuation button “BA” is actuated. Finally, this button »BA« is directly connected to the heating circuit of the roasting oven of the range.

The mode of operation of the control arrangement according to FIG. 3 is easily understandable after the above explanations. Without pressing the "T" button. "D" or BA "the current time generated by the electronic clock 20 is displayed on the display 17. If data for the automatic control of a roasting process are now to be entered, the " BA " button is pressed and the decoders 23 and 24 are prepared for To enter the roasting temperature, press the "T" button, which switches the input selection switch 19 to the "T" output and the pulses generated by the pulse generator 18 after it has been rotated are passed on to the counter 21. By pressing the button "T" not only the AND gate 25 was prepared, but also the AND gate 26 was blocked via the negated input, so that the display of the current time on the display 17 is interrupted and the display of the temperature can be done there. Corresponding output signals are sent from the counter 21 to the decoder 23, whereby, as soon as temperature values above 140 ° are entered there, depending on the entered temperature, one of the symbols indicated in the light field line 15 for the type of meat to be roasted lights up.After entering the temperature values, the button is now "D" is printed and the input selection switch 19 is switched to the "D" position,

ίο whereby the frying time in minutes can now be entered in the counter 22 via the pulse generator 18. By pressing button "D" , the AND gate 26 was blocked and the AND gate 27 was prepared for switching the entered roasting duration values to the display 17. The decoder 24 converts the output signals of the counter 22 into control signals for the light field line 16 on which, depending on the entered roasting time, one of the light fields with a symbol for the meat weight assigned to the entered roasting time lights up

While the respective selected luminous field of the luminous field line 15 or 16 lights up strongly from the lamps 29 produces a weak background lighting for both rows of luminous fields, as a sign that that the automatic roast is switched on

The particular advantage of the functionality described above consists in the user either reading the values to be entered on the digital display

jo or if he only knows that z. B. Veal weighing 1 kilogram is to be roasted, the light fields with the symbols »K« or "1" is observed on the lines of the luminous field 15 or 16 and the relevant ones are activated by actuating the pulse generator

J5 activates light fields A particular advantage of the on the basis of FIG. 1 described pulse generator consists in that this in forward and backward directions can be actuated and thus the lines of light fields 15 and 16 from left to right and vice versa

«Ο» can be driven through «.

The just described mode of operation of the control arrangement results for the case that the stove timer is only suitable for automatic roasting, which is why the control button "BA" is connected to both decoders 23 and 24 different roasting temperatures and roasting times are possible, the specified connection of the actuating button "BA" is not required. In this case, the roasting temperatures or roasting times can be set in the manner already described without pressing this button "BA". If the roasting process is to run automatically, after entering this data, the button »BA« is pressed, the stove heating is switched on and a roasting program specified in the stove is run through. If, on the other hand, the roasting process is not to take place automatically, the »BA« button is not pressed and the stove is switched on in the usual way at the set roasting temperature and for the roasting duration entered

Instead of the control arrangement shown in Figure 3 it is also possible to use a microprocessor in which the func- tions described above modes can be controlled by program.

For this purpose 2 sheets of drawings

Claims (12)

Patent claims: 1. Control arrangement for the display panel of an electronic stove clock with a multi-digit electronic digital display to display the current time and / or other data and with a pulse generator that can be activated by a rotatable actuator for adjusting the digital display, characterized in that in addition to the digital display to facilitate the A light field (15, 16) that can be controlled by the pulse generator (1.18) is provided for setting and for a longer-lasting display of the data for the automatic control of a roasting process, which is made up of a first number of light points that are assigned to the various temperature ranges of the roasting area of the stove, and consists of a second number of luminous dots which are assigned to different roasting times of the food to be roasted, that an actuating element (T, D) for activating the luminous dots for the temperature or roasting time is also present and that finally an electronic control circuit (21 b is 28) is provided and designed in such a way that when the frying temperature or frying time is set by the pulse generator, in addition to these digitally displayed values, a light point assigned to the frying temperature or frying time in question lights up on the light field 2. Control arrangement according to claim 1, characterized in that the luminous field (15, 16) from in two lines arranged luminous dots, of which the one line (15) of the temperature and the other (16) is assigned to the roasting time 3. Control arrangement according to claims 1 or 2, characterized in that each luminous point represents a small illuminated field that can be illuminated by itself 4. Control arrangement according to claims 1 or 2, characterized in that each light point is realized by a light emitting diode 5. Control arrangement according to claims 3 or 4, characterized in that each luminous point has an imprint or is assigned one 6. Control arrangement according to claim 1, characterized in that that associated with the temperature Luminous dots (15) carry symbols for the food to be fried. 7. Control arrangement according to claim 1, characterized in that those associated with the roasting time Luminous dots (16) carry symbols for the weight class of the food to be fried. 8. Control arrangement according to claim 1, characterized in that the control circuit consists of a from the pulse generator (1, 18) controlled microprocessor, which the individual functions on Controls the light field by program 9. Control arrangement according to claim 1, characterized in that the control circuit each one <the temperature and one of the duration associated counter or memory (21, 22), an input selector switch (19), two decoders (23, 24), of which at least the first of the values entered by them outputs such values only in a predetermined value range assigned to the> symbols on the luminous field, and has several logical linking elements (25 to 28) 10. Control arrangement according to claim 1, characterized in that the pulse generator (1, 18) several pulse-generating elements (4) arranged on it and a follicle that scans them ment (6), wherein the pulse-generating elements and the sensing element for generating Pulses for switching and adjusting the display can be rotated against each other. 11. Control arrangement according to claim 1, characterized in that an actuating switch »automatic roasting« (BA) is present, the actuation of which is a prerequisite for the controllability of the luminous field (15, 16) by the pulse generator (1.18) 12. Control arrangement according to claim 1, characterized in that the light field (15, 16) can be controlled by the pulse generator (1, 18) without prior actuation of an actuating switch "automatic roasting" (BA), the latter only to switch on the heating of the stove serves