DE102006056063A1 - Food baking oven, has auxiliary device and atomizer formed for inserting fluid e.g. water, into baking oven muffle in atomized form and/or as aerosol, where auxiliary device and atomizer are arranged in lower area of oven muffle - Google Patents

Abstract

The baking oven (11) has a baking oven muffle (13) and a heating unit and/or a grill heating body (15) provided in the baking oven muffle. An auxiliary device (23) and an atomizer (24) are formed for inserting a fluid e.g. water, into the oven muffle in an atomized form and/or as an aerosol (25). The auxiliary device and the atomizer are arranged in a lower area of the oven muffle, and an emission direction of the fluid is directed horizontally and/or into a middle area of the oven muffle. The auxiliary device has the atomizer running along a horizontal line. An independent claim is also included for a method for operating a baking oven.

Description

Field of application and status of the technique

The The invention relates to an oven with a baking oven muffle and a Heating or a barbecue body in the oven muffle and a method of operating such Oven.

It It is known that when operating an oven at grill mode often the problem occurs that the grill heater due to temperature very often clocked because a maximum oven temperature of about 320 ° C was not exceeded should or should be allowed. This clocking can lead to quality losses of the Lead the barbecue, especially because of a good grilling result the heat radiation or their duration of action in addition to the temperature in the oven muffle is very important.

Task and solution

Of the Invention is the object of an oven mentioned above and to provide an operating method mentioned at the outset, with whom problems of the prior art avoided who can and In particular, an improved grill operation can be achieved.

Is solved this object by an oven with the features of the claim 1 and a method with the features of claim 7. Advantageous as well as preferred embodiments of the invention are in the further claims and are explained in more detail below. Some of the features are described only once, but they should be independent as well as the oven as well for the operating procedure can apply. The wording of the claims is by express Reference made to the content of the description.

According to the invention, it is provided that at an aforementioned oven an additional device for introducing liquid in the oven muffle is present. This liquid can be beneficial to water be, for example, distilled water to calcification too avoid. The additional device is designed to, the liquid in nebulised form or as an aerosol in the oven muffle to bring. The term aerosol should be understood to mean that the liquid in very fine or under circumstances even as possible fine form atomized or is fogged. In particular, the liquid can therefore be used as a liquid mist or in the form of many small droplets be introduced. Above all, it should be avoided that the introduced liquid quickly falls to the bottom of the oven muffle or sinks. Hereinafter The term "aerosol" is used in general, and among them also in other form atomised liquid or sprayed liquid to understand.

By the invention it is possible that the introduced as an aerosol liquid in the hot oven muffle evaporates and thus lower the temperature in the oven muffle can. Ideally this leads to that the grill radiator can be operated in continuous operation, so without interruption by Clocking, wherein the introduction of the liquid prevents the maximum oven temperature is reached. So grill food can be permanent with heat radiation or IR radiation from the grill heater be applied without interruption. This leads to the aforementioned better or improved grill result.

In Embodiment of the invention, the additional device several Have entry points, for example, along at least a horizontal line can be distributed. Advantageous is the additional device arranged in the middle or lower area of the baking oven muffle, for example, to about 1/3 of the height. In this area it is possible that the aforementioned entry points still above a baking tray lie, which is inserted into the oven muffle and the food to be grilled wearing. This will ensure that the fluid is in the larger volume range the oven muffle is introduced.

In Another embodiment of the invention can be provided, the liquid near a temperature sensor or sensor by introducing at least one further entry point. This can be done there, so to speak, a local temperature reduction, to a clocking of the grill radiator to avoid. However, there should be no excessive heating the oven muffle done, otherwise the aforementioned maximum Oven temperature exceeded would become.

The Direction with which the liquid or the aerosol can be introduced into the baking oven muffle, can be horizontal or on a central area of the oven muffle to be aligned. This can be as even as possible distribution be reached in the baking oven muffle for uniform cooling of the Oven.

In a further embodiment of the invention, the additional device can extend along at least two side walls of the oven muffle. In a particularly advantageous embodiment, it or its entry points runs on both side walls and at the same height, in particular in each case along a straight line. It is also possible with slightly increased effort to provide several distributed entry points that are controlled differently can, for example, depending on the height of an inserted grill.

The Additional device can be used to generate the aerosol or for nebulization the liquid nebulizer means have, for example, piezo nebulizer. These are for proven use due to their robustness and reliability. Advantageous in each case one nebulizer means per aforementioned entry point intended. This can along a line on a side wall around 10 to 20 entry points be.

To the Respectively the liquid On the one hand a connection to a water pipe or the like. available be. Advantageously, however, the oven has a water supply or is associated with such a water-conducting. Advantageous the water supply becomes higher arranged as the entry points or the aforementioned nebulizer means. So can be achieved that the water to the entry points or the nebulizer means automatic flows in and no pumps or the like necessary. This reduces the constructive Construction and operational safety.

at Embodiment of the method according to the invention Is it possible, that in a simple version by an additional feature, the can be switched on during grilling operation, permanently liquid is introduced or atomized. Here a user has to look for it make sure that it only turns on this additional function if it makes sense or if an intensified grill function is desired.

In a more complex embodiment of the method, the Temperature in the oven muffle be monitored and when it reaches a temperature close to the maximum permissible oven temperature for operation lies, the liquid like described above is introduced to the oven temperature again cool. In this case, the introduction of liquid generally be made either permanently or clocked or in spurts respectively. For this purpose, a controller may be provided which with a Temperature detection for the oven muffle is connected. It can be provided that the oven temperature by introducing the liquid always under the for the grill operation is kept maximum oven temperature and thus the grill radiator during the entire grilling process is always activated.

In Another embodiment of the invention, the oven muffle a Fan as is generally known here from hot air stoves. With this can be the introduced into the oven muffle liquid or the aerosol are mixed with the oven muffle for distribution. Advantageous is the fan then turned on when liquid in the oven muffle is introduced. Otherwise, namely at Grill operation a ventilation not necessary.

These and other features go out the claims also from the description and the drawings, wherein the individual features each for alone or in the form of subcombinations an embodiment of the Invention and other fields be realized and advantageous also for protectable versions can represent for the protection is claimed here. The subdivision of the application into individual Sections and intermediate headings restrict the not in its generality among these statements.

Brief description of the drawings

embodiments The invention are shown schematically in the drawings and will be closer in the following explained. In the drawings show:

1 an illustration of a baking oven according to the invention with grill element and nebulizers on both inner side walls in the baking oven muffle;

2 temporal courses for temperature and performance without introduction of liquid and

3 the temporal courses according to 2 with introduction of liquid.

Detailed description the embodiments

In 1 is an inventive oven 11 shown with a housing 12 with oven muffle 13 , The oven muffle 13 has a left sidewall 14a and a right side wall 14b on. At the top of the oven muffle 13 is a standard grill radiator 15 attached and together with a temperature sensor 16 with a controller 18 connected. The control 18 controls the operation of the grill heater 15 and recorded via the temperature sensor 16 the oven temperature T _F in the oven muffle 13 , Furthermore, in the oven muffle 13 a baking tray 20 , a grill or the like. with grilled food 21 thereon. These may in a typical case be like halves of a grilled chicken. Up to this point corresponds to the oven 11 essentially a conventional or known oven.

In a linear arrangement along the side walls 14a and 14b are two additional facilities 23 arranged with a plurality of juxtaposed nebulizers 24 , These are in a straight and approximately horizontal line arranged. The essential functional part of the additional facilities 23 or the nebulizer 24 can be behind the side walls 14a and 14b lie. Only not shown in detail are outlet openings or small nozzles of the nebulizer 24 can through correspondingly small openings in the side walls 14 in the oven muffle 13 show or be visible.

The additional facilities 23 with the nebulizers 24 bring aerosol as shown 25 in the form of spray mist in the baking oven muffle 13 one. These are the additional facilities 23 by means of cables 26 together and above all with a water supply 28 connected. Furthermore, either each of the entire additional facilities 23 or groups of nebulizers 24 or even individual nebulizers 24 with the controller 18 each connected controllable. The control can therefore also each introducing liquid as an aerosol 25 in the oven muffle 13 control, for example, both in terms of temporal duration as well as locally over certain nebulizers 24 and the amount of fluid on the performance of the nebulizer 24 ,

A Grill mode as well as a grill temperature and also a possibly selectable Additional function with the introduction of liquid can through not shown controls through an operator is selected become.

In 2 is shown as the temperatures T are plotted along the left axis and applied along the right axis, the power P at the grill grille 15 or its operating state. The general oven temperature T _B was detected by a sensor, not shown, for example, approximately in a central region. In the grill process shown here two chicken halves were grilled, the oven with the grill radiator 15 preheated for five minutes at a setting of 270 ° C. After five minutes, the two halves of the chicken were cold and were ready after 40 minutes.

The temperature profile T _H shows the core temperature of the chicken halves, which is expected to increase slowly and steadily to just below 100 ° C. Based on the course of the power P can be seen as the grill radiator 15 the first 14 minutes is permanently operated.

Then he begins to be clocked, which means a maximum oven temperature has been achieved. The clocking then takes place at approximately equal intervals.

The dashed lines shown T _B shows the temperature in the oven muffle 13 at. T _B rises steeply for up to five minutes, drops very briefly for a short time when opening the door to insert the two halves of the chicken and then rises again to about 280 ° C. The temperature T _F indicates the temperature which the temperature sensor 16 detected. Because he usually and also like in 1 shown relatively close to the grill radiator 15 is arranged, its temperature T _{F is} slightly higher than the oven temperature T _B. It can be seen that the maximum oven temperature is 300 ° C and the grill heater 15 when reaching this maximum temperature starts to clock and thus the oven temperature T _{B takes} the corresponding clocked course.

From the course of the temperature T _B can be seen that it is on average about the selected 270 ° C. The temperature T _{F of} the temperature sensor 16 always just reaches the limit of 300 ° C, then on the control 18 the grill radiator 15 switch off for the clocking operation. The energy consumption in this grilling process was 1267 Wh in the experiment. No liquid was introduced.

In 3 Now a similar grilling process is shown with the same basic specifications, but with the operating state or operating time of the nebulizer represented by the curve N 24 , The core temperature of the chicken halves has a course similar to 2 , While there, however, the curve flattened out slightly at about 20 minutes, it continues 3 almost linear or flat is considerably weaker.

The course of the temperature T _F at the temperature sensor 16 is shown again and it falls in comparison to 2 on the fact that the temperature after the slight sagging after five minutes when opening the door increases relatively steadily until it is after 40 minutes at almost 200 ° C. This means that due to the operation of the nebulizer 24 or by the introduction of the liquid 25 in the oven muffle 13 the maximum oven temperature T _B of 300 ° C has not even been reached. This then also results in that the grill radiator 15 as can be seen on the curve P, is permanently operated without even a single time to clock. Also shown in dashed lines oven temperature T _B in the muffle 13 is almost the same as the course of the sensor temperature T _F or only a few ° C lower, which is not surprising. Furthermore, an in 1 not shown fan of the oven 11 always been in operation. The course V shows the operation of the nebulizer 24 at. The total energy consumption was 1616 Wh with continuous introduction of liquid.

When comparing 2 and 3 falls on that at 3 although the energy consumption is about 30% higher. However, this is hardly surprising and on the continuous operation of the grill heater 15 due. Above all, it can be recognized who that in the grilling process according to 3 the grill radiator 15 is always activated and thus the two chicken halves are always exposed to heat radiation and thus become crispy. This can be achieved just by the fact that the maximum allowable oven temperature or the corresponding temperature at the temperature sensor 16 has not been reached and thus a clock is not necessary.

Thus, the invention allows a much better ratio between the duration and intensity of the grilling process with heat radiation compared to the oven temperature reached, this just above all serves the purpose of clocking the grill element to avoid too high temperatures in the oven muffle 13 , Because neither in the arrangement nor the operation of the temperature sensor 16 must be intervened, especially if this is an electromechanical or ther momechanical temperature sensor with automatic corresponding control of the heating or the operation of the grill 15 depending on a preset temperature, this possibility according to the invention is particularly advantageous.

It is clear that the nebulizers 24 in other arrangements of different numbers or elsewhere in the oven muffle 13 can be attached. It is also conceivable, similar to a steam cooker, introducing the aerosol into the oven muffle 13 very close to a fan.

It However, it should also be noted that the invention is a fundamental has a different principle than a steam cooker or so-called steamer. There gets hotter Steam especially for heating the cooking chamber or for heating used therein arranged food. The hot steam is thus used before everything to warm up. In the present invention, the aerosol or the introduced liquid is used to cool down in the oven muffle. Above all, she does not get hot, but cold introduced into the oven muffle. So it's something else as a steamer or almost the opposite of it.

Claims (13)

Oven ( 11 ) with a baking oven muffle ( 13 ) and a heating or grill radiator ( 15 ) in the oven muffle ( 13 ), characterized in that an additional device ( 23 . 24 ) for introducing liquid, preferably water, into the baking oven muffle, wherein the auxiliary device ( 23 . 24 ) for introducing the liquid in atomized form or as an aerosol ( 25 ) is trained. Oven according to claim 1, characterized in that the additional device ( 23 ) several entry points ( 24 ), in particular distributed along at least one horizontal line. Baking oven according to claim 1 or 2, characterized in that the additional device ( 23 . 24 ) in the lower area of the oven muffle ( 13 ) is arranged, in particular to about one third of the height, wherein preferably a discharge direction of the liquid is aligned horizontally and / or in a central region of the baking oven muffle. Baking oven according to one of the preceding claims, characterized in that the additional device ( 23 . 24 ) along at least two side walls ( 14a . 14b ) of the oven muffle ( 13 ) runs or is arranged, preferably on both side walls and at the same height. Baking oven according to one of the preceding claims, characterized in that the additional device ( 23 ) Nebulizer means, in particular piezo nebulizer ( 24 ), wherein preferably several nebulizer means ( 24 ) are provided in a line next to each other, in particular ten to twenty. Oven according to one of the preceding claims, characterized by a water supply ( 28 ) with the additional facility ( 23 . 24 ) is connected in a water-conducting manner, wherein preferably the water supply ( 28 ) is higher than nebulizer agent ( 24 ) according to claim 5 for the automatic Nachfließen of water to the nebulizer means. Method for operating a baking oven ( 11 ) according to one of the preceding claims, characterized in that during operation of the oven ( 11 ) with a grill radiator ( 15 ) Liquid, preferably water, in the oven muffle ( 13 ) is introduced. A method according to claim 7, characterized in that the liquid as a liquid mist ( 25 ) or in the form of many small droplets or as an aerosol ( 25 ) is introduced, in particular atomized or sprayed. Method according to claim 7 or 8, characterized in that the temperature (T) in the oven muffle ( 13 ) is monitored and is introduced upon reaching a temperature near the maximum oven for operating fluid to lower the oven temperature. A method according to claim 9, characterized in that the introduction of liquid clocked or takes place in batches, preferably controlled by a controller ( 18 ), with a temperature detection ( 16 ) for the oven muffle ( 13 ) connected is. Method according to one of claims 7 to 10, characterized in that by introducing liquid into the oven muffle ( 13 ) the oven temperature is always kept below the maximum oven temperature for operation, whereby the grill heater ( 15 ) would be turned off at this for the operation maximum oven temperature, so that the grill element ( 15 ) is activated during the entire grilling process. Method according to one of claims 7 to 11, characterized in that during the grilling process, in particular during a specially selected grill mode, the additional device ( 23 . 24 ) is activated or liquid in the oven muffle ( 13 ), in particular water, preferably in a continuous operation of the additional device ( 23 . 24 ) always a similar amount of liquid in the oven muffle ( 13 ) is introduced. Method according to one of claims 7 to 12, characterized by a fan for the oven muffle ( 13 ) for mixing the air in the oven muffle with the introduced liquid ( 25 ), wherein preferably the fan is turned on when liquid in the oven muffle ( 13 ) is introduced.