EP1022512A1 - Cooking or baking oven using pellet fuel - Google Patents

Abstract

The pellets are conveyed between a supply container and burner chamber (6). A guide device (41) is provided in relation to the flow direction of the discharging exhaust gases (34) at the end of an exhaust duct (37) which is defined by the underneath of the cooking plate (12) and the upper boundary plate (35) of a baking compartment (19). The guide device ensures at least a part of the exhaust gas flow is discharged directly to an exhaust outlet of the stove body (1) and/or at least some of the exhaust gases are diverted into a connected exhaust flue (43) for heating additional outside surface areas of the baking compartment.

Description

The invention relates to a cooking and / or baking stove for operation with a pellet heat source for use in kitchen areas, as described in claims 1 and 24.

So-called kitchen stoves are known from the trade, which primarily serve a cooking function Have heating of food on a stove top and secondary in rather unsatisfactory Way offer a baking option by means of an integrated baking compartment. In addition to the mostly Suitable cooking function, but insufficient baking function can the well-known kitchen stove may also be used for heating purposes, in particular in the kitchen, where here too the results due to the lack of controllability of the desired heating output are rather unsatisfactory. These kitchen stoves are made with conventional firewood, preferably in the form of hardwood, e.g. with beech failures, heated. The necessary Firewood is usually from a wooden storage room in the basement to the kitchen area to create, on the one hand inconvenient loads to be carried and mostly Contamination of the premises caused on the way to the kitchen stove to be able to supply the kitchen stove with fuel. Furthermore, the heat output is the stove not least because of the specified size of the firewood, especially the Firewood logs, difficult to regulate and is in particular a self-sufficient or unobserved The stove cannot be operated.

The present invention has for its object a kitchen stove, especially one Cooking and / or baking stove, to create that meets today's requirements and above can be operated without interruption for a longer period of time.

This object of the invention is achieved by the features in claim 1. It is advantageous while the released thermal energy can be regulated relatively well and still the inherently advantageous combustion of naturally renewable raw materials is retained. The controllability of the thermal energy to be provided by the cooking and / or Baking oven is almost with the temperature regulating ability one with Equipped with electric energy-operated kitchen stoves. This is not least because the feed Amount of fuel, especially pellets, can be finely dosed and also the supplied Amount of combustion air can be easily monitored and adjusted so that the the associated amount of heat energy released is the preset, required Target temperatures in comparison to wood stoves exactly. In addition, the required, for good baking and / or cooking results relevant temperature levels compared to the known, furnaces or stoves fired with pieces of wood can be reached much faster, without an adverse override of the setpoint, i.e. the temperature setpoint is exceeded occurs due to the rapid rise in temperature of the hotplate and / or the baking compartment. The temperature values desired by the user are mechanical and / or electrical controls, in particular by means of sliders, flaps, rotary switches, push buttons or the like, adjustable in a simple manner. Due to the high level of automation a pellet heat source using electrical or electrotechnical components such as electric motors, Electromagnets, solenoid valves and the like is not only an optimal temperature regulation but also an unobserved, self-sufficient or unobserved for relatively long periods Long-term largely self-sufficient operation of the cooking and / or Oven possible. A major advantage is that the individual functions of the cooking and / or baking oven can be used largely selectively. In particular is the cooking and / or baking stove according to the invention on the one hand primarily as a heat source for cooking purposes adjustable and usable as well as usable as an oven if the appropriate settings, especially on the diverter for the flue gases and the desired temperature settings have also been made. With the optional adjustable baking compartment function, the generated thermal energy is then primarily from the baking compartment used or recorded and can therefore also guarantee excellent baking results become. In addition to the maintenance-free operation of the cooking and / or Oven due to the very clean, almost residue-free combustion and the very low ash accumulation of the pellet heat source, the need for regular Disposal activities are unnecessary and are also pollution of the living area kept relatively low by these activities. The storage container for storage of the fuel material is capable of long-term supply even with a relatively small volume ensure the cooking and / or baking stove with the pellets, so that a significant handling advantage and a considerable gain in comfort is achieved. A refill of the storage container with the fuel is comparatively easy and also physically weak or frail persons can be carried out in a simple manner. Furthermore can compare the emission values of the cooking and / or baking oven according to the invention to be kept lower than conventional cookers fired with firewood, which can significantly reduce the environmental impact of thousands of households.

Further advantageous developments or further developments are described in the further claims. The advantages that can be achieved in this way can be found in the detailed description of the figures.

The invention is described below with reference to the exemplary embodiments shown in the drawings explained in more detail.

Fig. 1

einen Koch- und/oder Backherd mit einer Pelletswärmequelle in Frontansicht geschnitten und in stark vereinfachter, schematischer Darstellung;

Fig. 2

den Koch- und/oder Backherd in Draufsicht mit der Kochplatte und dem dahinter angeordneten Vorratsbehälter für die Pellets in stark vereinfachter, schematischer Darstellung;

Fig. 3

den Koch- und/oder Backherd in Seitenansicht, geschnitten gemäß den Linien III-III in Fig. 1;

Fig. 4

einen Längsschnitt durch den Vorratsbehälter zur Aufnahme der Pellets, geschnitten gemäß den Linien IV-IV in Fig. 3;

Fig. 5

eine andere Ausführungsform eines Koch- und/oder Backherdes mit einer, bezogen auf die abgebildete Frontansicht desselben, seitlichen Anordnung des Vorratsbehälters für die Pellets, in stark vereinfachter, schematischer Schnittdarstellung;

Fig. 6

den Koch- und/oder Backherd gemäß Fig.5 bei Draufsicht auf die Kochplatte in stark vereinfachter, schematischer Darstellung;

Fig. 7

eine weitere Ausführungsvariante eines Koch- und/oder Backherdes für den Betrieb mit einer Pelletswärmequelle mit einer vertikal verlaufenden Trennwand im Ofenkörper in Frontansicht geschnitten;

Fig. 8

den Koch- und/oder Backherd nach Fig. 7 in Seitenansicht, geschnitten gemäß den Linien VIII-VIII in Fig. 7;

Fig. 9

eine andere Ausführungsform eines Koch- und/oder Backherdes mit der Pelletswärmequelle zur Verwendung als Zentralheizgerät umfassend zumindest einen Gas-Flüssigkeitswärmetauscher in Frontansicht geschnitten und in stark vereinfachter, schematischer Darstellung;

Fig. 10

den Koch- und/oder Backherd mit Zentralheizungsfunktion gemäß Fig. 9 in Seitenansicht geschnitten.

Show it:

Fig. 1

a cooking and / or baking stove with a pellet heat source cut in front view and in a highly simplified, schematic representation;

Fig. 2

the cooking and / or baking stove in plan view with the hotplate and the storage container for the pellets arranged behind it in a highly simplified, schematic representation;

Fig. 3

the cooking and / or baking oven in side view, cut along the lines III-III in Fig. 1;

Fig. 4

a longitudinal section through the storage container for receiving the pellets, cut along lines IV-IV in Fig. 3;

Fig. 5

another embodiment of a cooking and / or baking oven with a, based on the illustrated front view of the same, lateral arrangement of the storage container for the pellets, in a greatly simplified, schematic sectional view;

Fig. 6

the cooking and / or baking stove according to Figure 5 in plan view of the hotplate in a highly simplified, schematic representation;

Fig. 7

a further embodiment variant of a cooking and / or baking oven for operation with a pellet heat source with a vertically extending partition in the oven body cut in front view;

Fig. 8

the cooking and / or baking stove of Figure 7 in side view, sectioned along lines VIII-VIII in Fig. 7.

Fig. 9

another embodiment of a cooking and / or baking stove with the pellet heat source for use as a central heating device comprising at least one gas-liquid heat exchanger cut in front view and in a highly simplified, schematic representation;

Fig. 10

the cooking and / or baking stove with central heating function according to FIG. 9 cut in side view.

In the introduction it should be noted that in the embodiments the same parts have the same reference numerals or the same component names are provided, which in the entire description contained disclosures analogously to the same parts with the same reference numerals or the same component names can be transferred. They are also in the description selected location information, such as top, bottom, side, etc. to the one described immediately as well as the figure shown and are analogous to a change of position to the new one Able to transfer. Furthermore, individual features or combinations of features can also be made the different exemplary embodiments shown and described independently, represent inventive or inventive solutions.

1 to 4 is a furnace body 1, in particular a cooking and / or baking oven 2 for the Preparation of food to be warmed shown. The cooking and / or baking oven 2 shown is therefore for use in kitchens, preferably in the household area, but also for commercial use Designed for use in snack stations, bakeries or restaurants and the like.

The heat energy to be supplied to the dishes or baked goods is in this cooking and / or Oven 2 from the combustion of biomass, especially in the form of mechanical compressed fuel 3 in the manner of so-called pellets 4, won. This known per se Fuel 3 in the form of free-flowing pellets 4 is in a storage container 5 inside of the furnace body 1 stored in the long term, a controlled combustion process, which takes place in a combustion chamber 6 delimited from the storage container 5, metered accordingly to be able to be fed.

The storage container 5 for the pellets 4 is by a largely independent part body, which together with the stove part represents the one-story furnace body 1. The cuboid furnace body 1 is of at least one front wall part 7, at least two side wall parts 8, 9, at least one rear wall part 10 and at least one cover plate 11. The multi-part, upper boundary part of the furnace body 1 in the form of the cover plate 11 comprises also a hotplate 12 made of a suitable material, in particular of a material with low deformation or thermal expansion at the prevailing temperatures at the Underside of the hotplate 12. The hotplate 12 for storing cookware and for heating the food to be prepared takes up a large part of the area within the outer outline shape when looking at the stove top. The hotplate 12 is the front wall part 7 assigned closer than the rear wall part 10, so that starting from the usual an operating side 13 of the stove part 1 front wall part 7 good accessibility is given to the hotplate 12 of the cooking and / or baking oven 2.

In a rear area of the furnace body facing away from the front or operating side 13 1, the storage container 5 for the pellets 4 is arranged and swiveled over a Slidable reservoir lid 14 accessible to refill pellets 4 and the reservoir 5 can then be closed again.

In the front wall part 7 there is at least one combustion chamber door 15, through which the combustion chamber 6 is accessible or lockable, and at least one ash room door 16 for locking or opening an ash room 17 provided below the combustion chamber 6.

A baking compartment door 18 for closing or opening one is also preferred in the front wall part 7 Baking compartment 19 is provided in the cooking and / or baking oven 2.

The combustion chamber 6 and the baking compartment 19 are side by side in the front view of the oven body 1 arranged and their total extent corresponds when viewed from the front - according to FIG. 1 - in approximately the length of the storage container arranged behind the combustion chamber 6 and behind the baking compartment 19 5 for the fuel 3.

Furthermore, the cooking and / or baking stove 2 comprises a fuel supply device 20, with which the fuel materials 3, in particular the pellets 4, starting from the storage container 5 metered to a fireplace 21 in the combustion chamber 6 can be supplied. The fuel delivery device 20 comprises, as is known per se, a screw conveyor which can be driven by an electric motor 22 23, which the pellets 4 from a lower area of the storage container 5 after Conveys at the top and transfers the highly conveyed pellets 4 to a sloping pellet chute 24. By means of this pellet chute 24, they slide into the upper end region of the screw conveyor 23 transported pellets 4 to gravity under the influence of gravity Fire pit 21 in the combustion chamber 6. An outlet opening 25 of the pellet chute 24 is in one sufficient distance above the fireplace 21. The slope of the pellet chute 24, starting from the upper end region of the screw conveyor 23 to the fireplace 21 is present chosen such that pellets 4 conveyed into the pellet chute 24 completely slide off and none at all Pellets 4 can remain in the pellet chute 24.

The fireplace 21 preferably consists of a receiving shell 26 for receiving the Combustion provided pellets 4. The lower section of the receiving shell 26 is preferred inserted in a recess of a combustion chamber floor plate 27. At least the one under The combustion chamber base plate 27 projecting part of the receiving shell 26 has a plurality of openings 28 to form inflow openings for combustion air 29, if necessary, also Openings 28 in the combustion chamber base plate 27 for the inflow of combustion air 29 in the combustion chamber 6 may be provided. This combustion air 29 then becomes primarily flames 30 supplied and thus serves as secondary air.

The through the openings 28 in the receiving shell 26 or in an ember stick 31 or in the Combustion air 29 flowing in for the combustion material 3 provided serves as Primary air for the combustion process.

At least partial areas of the walls of the combustion chamber 6 are temperature-resistant Lining 32 provided, or also formed by this lining 32. The lining 32 can be formed by known ceramic materials or fireclay.

The combustion chamber 6 is preferably delimited at the top by the underside of the hotplate 12. Those from the combustion chamber walls, the fireplace 21 and the combustion chamber floor plate 27 The unit formed represents a pellet heat source 33, which is the hotplate 12 heated directly from below. If necessary, a largely horizontally oriented one Partition plate between the combustion chamber 6 and the hot plate 12 may be provided to a to prevent direct flaming of the underside of the hotplate 12. However, one is preferred direct heating of the hotplate 12 by the fireplace 21 or by the pellet heat source 33 is provided in order to achieve rapid heating of the hotplate 12.

Combustion or flue gases 34 arising during the combustion of the fuel 3 increase up in the combustion chamber 6 to the underside of the hotplate 12. These are deleted below starting from an area of the hotplate 12 closer to the first side wall part 8 whose underside along to a region closer to the second side wall part 9 Hot plate 12.

An upper boundary plate 35 of the baking compartment 19 is at a distance 36 below the Hotplate 12 arranged so that a flue gas duct between the hotplate 12 and the baking compartment 19 37 is formed, which extends at least over a width 38 of the baking compartment 19. The hot flue gas 34 flowing out of the combustion chamber 6 thus heats up by sweeping it along on the underside of the hotplate 12 and by flowing past the top Boundary plate 35 of the baking compartment 19 for the most part, the hotplate 12 to a comparatively lower proportion of the baking compartment 19. The flue gas duct 37 also extends over the majority, namely approximately over 60% to 90% of a length 39 of the hotplate 12.

In addition, the cooking and / or baking stove 2 with the pellet heat source 33 has a suction fan 40 for the flue gases 34, preferably in the end region of the flue gas duct 37, to the flow rate regulate, change or maintain the flue gases 34 in the flue gas duct 37 to be able to. The suction fan 40 is preferably driven by an electric motor and is stationary as well as the electric motor 22 of the fuel supply device 20 with one not shown Control and / or regulating device or with manually operated control and / or Setting elements in the form of switches or rotary knobs in line connection.

Referring to the flow direction is in the area of the closer to the second side wall 9 End area of the hotplate 12 or the baking compartment 19 a diversion device 41 for the flue gases 34 arranged. By means of this diversion device 41, the flue gases 34 can escape the first flue gas duct 37, which the flue gases 34 from the upper region of the combustion chamber 6 collects and forwards horizontally, fed directly to a flue gas outlet channel 42 become. As an alternative to this, it is also possible with the diverter device 41 to remove the smoke gases 34 in its own flue gas flue 43 to flow around additional wall areas of the baking compartment 19 to lead. The flue gas duct 43 for the flow around additional outer sides of baking compartment walls 44 and / or for the flow against a baking tray base 45 at least in some areas preferably also a train deflection 46 for the flue gases 43. This train deflection 46 is through a baffle plate arranged at a distance 47 below the baking tray base 45 is formed and places a partition plate between an upper flow channel and one located below Flow channel with oppositely directed flow profiles of the flue gas 34 The train deflection 46 thus causes a deflection of those directed into the flue gas duct 43 Flue gases 34 in an area below the baking compartment floor 45 for backflow into the area the upper limit plate 35 and the entry into the flue gas outlet channel 42.

In the position of the diverter device 41 shown in full lines, which by an adjustable, in particular pivotable or displaceable deflection member 48 in the form of a flap or the like is formed, flow from the combustion chamber 6 via the flue gas duct 37 and thereby on the underside of the hotplate 12 cooled flue gases 34 in the Flue gas outlet channel 42 a. In the end region of the flue gas outlet duct related to the flow direction 42 is a flue gas nozzle 49 for transferring the flue gases 34 into a chimney arranged. The smoke gas flow is possibly caused by the suction effect of the suction fan 40 regulated.

In the position of the diverter 41 shown in dashed lines, the cooking and / or Baking oven 2 switched to baking operation, in which the smoke gas duct 37 supplied flue gases 34 from the combustion chamber 6 into the additional flue gas duct 43 and at least partial areas of the baking compartment walls 44 and / or the baking compartment base 45 flow around, so that the baking tray 19 is heated from the outside. The opposite flow the flue gas 34 in the flue gas flue 43 is substantially L-shaped in section Zugumlenkung 46 achieved, which is spaced at least substantially parallel spaced Sections of the baking compartment walls 44 and / or extends to the baking compartment base 45.

Instead of the step-by-step switchover of the diversion device 41 or the deflection element 48 to extend or shorten the flue gas duct 37 by the length of the flue gas flue 43 for a more intensive or extensive flow around the outer wall areas of the baking compartment 19, a stepless adjustment of the deflection element 48 is also possible. With the intermediate positions between the first position shown in full lines and that in dashed lines The second position shown is then a partial load operation or a regulation of the temperatures in the baking compartment 19. The setting or control of the diverter 41 can manually via a boom system and corresponding control levers or also by means of electrical Adjustment drives take place. These electric actuators are not one shown, electrical control and / or evaluation device line-connected.

It is also possible to provide the diversion device 41 with a sensor arrangement for regulating the baking compartment temperature assign. This sensor arrangement can be, for example, a bimetal sensor are formed, which corresponds to the pivot position of the deflection element 48 regulates a preferably adjustable setpoint. Instead of mechanical temperature control it is of course also possible to use an electrical temperature control device comprising a temperature sensor for the baking compartment temperature, an electrical control and / or To provide evaluation device and an actuator for the diverting device 41.

In particular, the wall part of the combustion chamber 6 adjacent to the storage container 5, shown in FIG Embodiment, the rear wall of the combustion chamber 6, is at least partially with a refractory or temperature-resistant lining 32 provided or formed by this. The fireproof Lining 32 also provides an insulating layer between the reservoir 5 and the Combustion chamber 6 is preferred. The rear wall of the combustion chamber 6 - or according to the following Embodiments at least one side wall of the combustion chamber 6 - at a distance 50 arranged to the nearest wall of the storage container 5, so that between the combustion chamber 6 facing reservoir wall and the rear wall of the combustion chamber 6 in a vertical Direction cooling channel 51 is formed. Through this cooling channel 51 is due the thermosiphon effect ambient air from the bottom of the cooking and / or baking oven 2 sucked in and rises in the cooling channel 51. The cooling air 52 that has entered then occurs an upper area of the cooking and / or baking oven 2, in particular between the storage container 5 and the hotplate 2, in heated form again from the furnace body 1 and mixed deal with the ambient air.

The storage container 5 and the stove part or combustion chamber 6 have only relatively small-area connecting surfaces or connection cross-sections, so that heat transfer by heat conduction between the combustion chamber 6 and the reservoir 5 is largely minimized.

The cooling channels 51 between the combustion chamber 6 and the storage container 5 apply less for the reservoir 6 as for the pellet chute 24 representing the chute and the Screw conveyor 23. The cooling channels 51 are therefore primarily intended to overheat the pellet chute 24 and / or the screw conveyor 23, so that the pellets are ignited too early 4 is prevented.

It should also be noted that the fireplace 21 or the receiving shell 26 for combustion the pellet 4 is arranged lower than the baking compartment floor 45 and in the process directly next to one the side wall of the baking compartment 19 is located. By deriving the flue gases 34 from the fireplace 21 along the first side wall of the baking compartment 19 and largely horizontally along the upper boundary plate 35 to the second baking compartment wall 44 and along this down to the baking compartment floor and along its underside to close to the first baking compartment side wall If the baking mode is set, extensive rinsing and thus one effective heating of the baking compartment 19 achieved. If the diversion device 41 is open Baking mode is set, the flue gases 34 are almost around the entire outer circumferential area of the baking compartment 19 passed, whereby a highly effective heating of the baking compartment 19 and thus a good baking result with the pellet heat source 33 for the baking compartment 19 can be achieved. The outer surface areas of the baking compartment 19 can also be used be provided with a fireproof or heat-resistant covering. The almost over the entire The circumferential area of the baking compartment 19 extends flue gas flow on one vertically oriented plane reference. The described flue gas duct creates both Top heat, but above all bottom heat in the baking compartment 19. The relationship between top and Bottom heat in the baking compartment 19 can be changed via the diversion device 41.

As can best be seen from FIG. 4, the longitudinal extent of the fuel delivery device runs 20, in particular the longitudinal central axis of the screw conveyor 23, essentially parallel to the rear wall part 10 of the furnace body 1, whereby comparatively long screw conveyors 23 can be used, the sensitive metering of the combustion chamber 6 supplied Amount of pellets 4 allows. The storage container 5 runs at least in the lower region funnel-shaped, so that complete emptying of the storage container 5 is ensured.

The furnace body 1 or the cooking and / or baking stove 2 with the pellet heat source 33 has standard width, depth and height dimensions to match with standard kitchen equipment or to be able to be combined as standard available kitchen units. So are standardized or standardized depth dimensions of the cooking and / or baking oven 2 with the pellet heat source 33 preferably 60 cm. The width dimensions, however, can be 45 cm, 60 cm, 90 cm, 105 cm or any combination of the above values. The aforementioned, standardized dimensions are primarily on a range 53 of the cooking and / or Baking oven 2 given. The hearth rim 53 provides the outer boundary when viewed from above the hotplate 12 or the stove part of the furnace body 1.

Alternatively, it is also possible to arrange the furnace body 1 in such a way that the storage container 5 is spatially separated from the hearth part by means of a wall 54 or masonry, so that the reservoir 5 is to be loaded outside of the location of the cooker part. This can contaminate the kitchen area, e.g. due to dust in the Filling the storage container 5 with pellets 4 can be avoided. But this is also one given additional thermal decoupling of the reservoir 5 from the hearth part 55. In addition the entire standardized depth of a kitchen block can be used for the cooker section 55.

The walling that can be made as required between the storage container 5 and the stove part 55 is illustrated in FIG. 3 by dash-dotted lines.

5 and 6 is a further embodiment of the cooking and / or baking oven 2 with the pellet heat source 33 shown, the same for parts already described above Reference numerals are used and thus previous descriptions are analogous to the same Parts with the same reference numerals can be transferred.

Here, the combustion chamber 6 and the pellet heat source 33 refer to a front view of the furnace body 1 between the storage container 5 for the pellets 4 and the baking compartment 19 arranged. In particular, the storage container 5 is referring to the operating side 13 of the furnace body 1 on the side of the hearth part 55, comprising the combustion chamber 6, the hotplate 12 and / or the baking compartment 19. Accordingly, the side wall part 8 or alternatively the side wall part 9 represents an outer boundary wall of the storage container 5 The longitudinal axis of the fuel supply device 20 or the screw conveyor 23 extends essentially at right angles to the side wall part 8 of the furnace body 1 and thus promotes the Pellets 4, starting from the side wall part 8 of the furnace body 1, towards that in the central region of the furnace body 1 located combustion chamber 6. Between the reservoir 5 and the Adjacent combustion chamber 6 is preferably also a cooling duct 51 through which Cooling air 52 can rise and emerge again in the upper region of the furnace body 1. Possibly can be arranged next to each other in relation to the front view Storage container 5 for the pellets 4 and the hearth part 55 a wall 54 or wall be provided to these parts of the furnace body 1 different premises, in particular to assign a kitchen and a boiler room or storage room for the fuel 3.

In this embodiment too, reference is made to the direction of flow of those to be discharged Smoke gases 34 in the end region of the through the bottom of the hotplate 12 and limited by the upper limit plate 35 or by the upper limit of the baking compartment 19 Flue gas duct 37 arranged the diverter 41. By means of this diverter 41 is on the one hand a comparatively direct derivation of at least part of the Flue gas flow from the supplying flue gas duct 37 to the flue gas outlet or to the corresponding one Flue gas outlet channel 42 of the furnace body 1 and / or at least partially Redirection of the flue gases 34 into a flue gas flue 43 connected downstream for charging further, outer surfaces of the baking compartment 19 with the hot flue gases 34 as required adjustable. By means of the diversion device 41, a change, in particular by changing the length and / or path of the flow paths for the flue gas 34 in the furnace body 1 the intensity of the flue gas circulation around the baking compartment 19 can be changed or regulated.

7 and 8 is a further embodiment of the cooking and / or baking oven 2, which of course also for heating rooms, especially kitchen-living rooms, can be used. For parts already described above, this will include: The same reference numerals are used, whereby the above description is analogous same parts with the same reference numerals can be transferred.

Here again, a wall part of the storage container 5, in particular the pellet tank, provides one Side wall part 8 of the furnace body 1 and is the reservoir 5 with an opposite Wall part connected to the actual hearth part 55 or flanged to the side surface. In front view of the furnace body 1, the combustion chamber 6 is again between the storage container 5 and the baking tray 19 arranged.

The furnace body 1 has a vertically extending partition 56, which essentially is aligned parallel to the front wall part 7 of the cooking and / or baking oven 2. The vertical Partition 56 in the furnace body 1 extends from the floor area to Underside of the hotplate 12. The hotplate, which runs essentially at right angles to one another 12 and partition 56 form a largely gas-tight partition in their connection area.

A distance 57 measured in the horizontal direction between the front wall part 7 and the The partition 56 is smaller than a depth 58 of the baking compartment 19. The depth 58 of the baking compartment 19 is by the horizontal distance between the inside of the baking compartment door 18 and one Baking compartment rear wall 59 given. After the depth 58 of the baking compartment 19 is larger than the distance 57, the rear section of the stream compartment 19 projects through the partition 56 through and is thus located in a rear sub-chamber delimited by the partition 56 60 of the oven body 1. The majority of the baking compartment 19 is located in a front Subchamber 61 of furnace body 1 referring to vertical partition 56.

The fireplace 21 or the receiving tray 26 for burning the pellets 4 is located in the front compartment 61 next to the baking compartment 19. In the area opposite the fireplace Baking compartment wall 44, an opening 62 is provided in the partition 56, so that the flue gases 34, starting from the front compartment 61, into the rear compartment 60 can flow. The flue gases 34 thus rise from the fireplace 21 on the up the first baking compartment wall and subsequently flow into the flue gas duct 37, which passes through the underside of the hotplate 12 and through the upper boundary plate 35 of the baking compartment 19th is limited to the opposite, second baking compartment wall 44. Furthermore, these flue gases flow 34 on the outside of the baking compartment wall 44 down to the opening 62 in the partition 56 and then flow into the rear sub-chamber 60 of the furnace body 1. In the rear sub-chamber 60 then remove the flue gases 34, starting from the lower region of the back wall of the baking compartment 59, up to this in an upper region of the oven body 1 or the baking compartment 19. In the rear partial chamber 60, the suction fan 40 is arranged in the upper edge area, which on the outlet side with the flue gas connector 49 for transferring the cooled Flue gases 34 is connected to a chimney. The flue gas connector 49 can, as in full Lines shown, a vertical connection or, as in dashed lines shown, have a horizontal connection for a smoke pipe.

In the baking operation of the oven body 1, the flue gas flue 43 therefore runs from the lower one Area of the baking tray 19 along the first baking tray side wall up to the underside of the Cooking plate 12 and subsequently on the opposite baking compartment wall 44 down into the rear compartment 60 and heats the back wall 59 in this rear compartment 60, before the flue gases 34 leave the furnace body 1.

Again, a diverting device 41 or also diverting device is preferably provided, which are used to switch between baking and heating or cooking can. The diverter device 41 is selectively closable by means of a flap 63 Breakthrough 64 formed in the partition 56. The diverter 41 is related on the front view of the largely rectangular oven body 1 and the baking compartment 19 of the Fire pit 21 diagonally opposite, i.e. fire pit 21 is a lower edge of the baking compartment 19 assigned, whereas the diverter 41 to the diagonally opposite Corner area of the baking tray 19 is assigned and also between the hotplate 12 and the upper limit plate 35 of the baking compartment 19 is placed. With breakthrough open 64 the flue gases only flow on the first side of the baking compartment and the upper boundary plate 35 of the baking compartment 19 along and get through the opening 64 directly in the rear sub-chamber 60 to the flue gas nozzle 49. So when the opening 64 is open The flue gas duct length is shortened and the hotplate 12 is predominantly from the flue gases 34 heated up. When the opening 64 is closed, opposing baking compartment walls 44, the upper boundary plate 35 of the baking compartment 19, and the baking compartment rear wall 59 flows from the flue gases 34 and takes place through the comparatively long flue gas duct more intensive heating of the baking compartment 19.

Referring to the front view of the furnace body 1 are the fireplace 21, the suction fan 40, the diverter 41 and the opening 62 as a transition between the two Partial chambers 60, 61 are each assigned to a corner region of the baking compartment 19.

In this embodiment too, a more or less direct derivation is at least one Part of the flue gas flow from the feed flue gas duct 37 to the flue gas outlet or to the corresponding flue gas outlet duct 42 of the furnace body 1 and / or at least one partial redirection of the flue gases 34 into a downstream flue gas flue 43 for exposure additional, outer surface areas of the baking compartment 19 with the hot flue gases 34 adjustable as required. In the embodiment in question, this is the flue gas path extending, vertically extending flue gas duct 43 essentially from the baking compartment wall 44 and the closest side wall part 9 and can also refer to the Direction of flow of the flue gases 34 downstream rear chamber 60 for expanded Flue gas flue 43 can be counted.

By means of the diversion device 41, a change, in particular a change Length and / or path change of the flow paths for the flue gas 34 in the furnace body 1 die Intensity of the flue gas circulation around the baking compartment 19 can be changed or regulated.

An ash drawer arranged below the receiving tray 26 for the combustion of the pellets 4 65 has a cleaning cup 66 in the rear section, which extends through the partition 56 extends into the rear partial chamber 60. By means of this in the rear compartment 60 protruding cleaning cup 66 floating components are collected from the flue gas 34 and can be disposed of together with the ashes in the upstream ash drawer 65. The rear flue gas chamber has at least one dirt baffle 67 with which the suspended components are guided towards the cleaning cup 66. In particular points the rear part chamber 60 in the lower part area with at least one dirt baffle 67 which the rear sub-chamber 60 converges in a funnel shape, so that the majority of the deposited suspended components from the flue gas 34 in the cleaning cup 66.

A seal 68 is preferably provided between the ash drawer 65 and the partition 56, to the exit of flue gas 34 from the rear subchamber 60 into the ash chamber 17 avoid. The cleaning cup 56 and the ash drawer 65 are preferably in one piece Component connected so that the ash drawer 65 and the cleaning cup 66 together from the Furnace body 1 can be removed.

9 and 10 is a further development of the furnace body 1 with the pellet heat source 33 shown. The structure of this furnace body 1 is fundamentally equivalent to the structure of the Furnace body 1 according to FIGS. 7 and 8, whereby for parts already described above same reference numerals are used.

At least one heat exchanger 69 is provided in the interior of the furnace body 1, with which the contained in the flue gases 34 and / or those directly from the flames 30 or from Ember stick 31 of the pellet heat source 33 emitted thermal energy at least partially liquid medium 70, preferably water, can be transferred. The heat exchanger 69 is accordingly formed by a gas-liquid heat exchanger 71, which is at least a part of the Receives and dissipates thermal energy of the flue gases 34.

Preference is given to the side wall parts 8, 9 arranged in the outer region of the hearth part 55 Range part 55 and / or the rear wall part 10 each assigned a heat exchanger 69, so that a top view of the furnace body 1 a U-shaped water jacket in the outer area of the Herd part 55 results. Alternatively or in combination, it is also possible, at least to provide a wall of the walls defining the combustion chamber 6 with a heat exchanger 69 or to form at least one combustion chamber wall by a heat exchanger 69.

The individual heat exchangers 69 can be connected in series and into a coherent one Heat exchanger 69 are connected. Of course, it is also possible for everyone To operate heat exchanger 69 independently of the remaining heat exchangers 69.

The coherent heat exchanger unit or each individual heat exchanger 69 has a flow connection 72 for the introduction of the liquid heat extraction medium and one Return connection 73 for the exit of the heated heat extraction medium from the heat exchanger 69 on. If necessary, at least one of the connections can be pipeline-connected to a pump 74 and the pump 74 itself can be mounted on the furnace body 1. With the pump 74 a flow of the medium 70 through the heat exchanger 69 causes and can thus a heating circuit being constructed.

The cooking and / or baking oven 2 with the oven 19 and / or the hotplate 12 and Heat exchangers 69 can thus also be used as a central heating device 75. The gas-liquid heat exchanger 71 are preferred on the outer side and / or rear wall parts 8, 9, 10 of the furnace body 1 and / or directly around the fireplace 21 or in the outer area of the Combustion chamber 6 mounted. The heat exchangers assembled from several sheet metal blanks 69 point to achieve sufficient inherent rigidity or to increase the heat transfer area several bulges or reshapes.

Of course, the combustion air supply can be regulated, in particular Primary and / or secondary air control devices for changing the amount supplied Combustion air can be assigned. These air control devices can be done manually by means of suitable operating elements and / or automated via an electrical control and / or Control device are operated.

Alternatively, it is also possible to use a pellet heat source 33, i.e. a combustion chamber 6 with a storage container 5, preferably arranged behind it, as a module, which on the one hand with appropriate cladding parts can be used as a pellet stove and on the other hand can be coupled to the stove part 55 to form a cooking and / or baking stove 2. The modular, multi-use pellet heat source 33 is thereby connected to the hearth part 55 flanged to the side without its own combustion chamber. When operating the modular pellet heat source 33 as a conventional pellet stove for heating purposes can have an intermediate partition in the combustion chamber 6 can be used on both side walls, in the case of use as a heat source for the hearth part 55 serves as insulation to the outside. In case of use as a single Pellet stove with different, exchangeable or removable cladding parts this then starting as a heat exchanger, namely in the form of a counter-pull for the flue gases 34 from the upper area of the combustion chamber 6 or the combustion chamber cover plate into the area the combustion chamber floor plate 27.

For the sake of order, it should finally be pointed out that for a better understanding of the Construction of the furnace body 1 of these or its components partially to scale and / or were shown enlarged and / or reduced.

The task on which the independent inventive solutions are based can be described be removed.

Above all, the individual, in FIGS. 1, 2, 3, 4; 5, 6; 7, 8; 9, 10 shown versions form the subject of independent solutions according to the invention. The related, The objects and solutions according to the invention can be found in the detailed descriptions of these figures remove.

List of reference symbols

1.

Furnace body

2nd

Cooking and / or baking stove

3rd

Fuel

4th

Pellets

5.

Storage container

6.

Combustion chamber

7.

Front wall part

8th.

Side wall part

9.

Side wall part

10th

Rear wall part

11.

Cover plate

12th

Hot plate

13.

Operator side

14.

Reservoir lid

15.

Firebox door

16.

Ash room door

17th

Ash room

18th

Baking compartment door

19th

Baking compartment

20th

Fuel delivery device

21.

Fireplace

22.

Electric motor

23.

Auger

24th

Pellet chute

25th

Outlet opening

26.

Holder

27.

Combustion chamber floor plate

28

breakthrough

29.

Combustion air

30th

Flames

31

Ember stick

32.

lining

33.

Pellet heat source

34.

Flue gas

35.

Boundary plate

36.

distance

37.

Flue gas duct

38.

width

39.

length

40.

Exhaust fan

41.

Diverter

42.

Flue gas outlet channel

43.

Flue gas flue

44.

Baking compartment wall

45.

Baking tray floor

46.

Train redirection

47.

distance

48.

Deflector

49.

Flue gas nozzle

50.

distance

51.

Cooling channel

52.

Cooling air

53.

Hearth wreath

54.

Wall

55.

Stove part

56.

partition wall

57.

distance

58.

depth

59.

Back panel

60.

Partial chamber (rear)

61.

Partial chamber (front)

62.

breakthrough

63.

flap

64.

breakthrough

65.

Ash drawer

66

Cleaning cup

67.

Dirt baffle

68.

seal

69.

Heat exchanger

70.

medium

71.

Gas-liquid heat exchanger

72.

Flow connection

73.

Return connection

74.

pump

75.

Central heating device

Claims (24)

Cooking and / or baking stove for operation with a pellet heat source, with a Combustion chamber, a receptacle arranged in the combustion chamber for the combustion of Pellets, a fuel delivery device between a storage container for the Pellets and the combustion chamber, a flue gas flue connected to the combustion chamber, which with a suction fan for the pellet combustion Flue gases are coupled and with a supply for combustion air in the area the receptacle or through openings in it opens into the combustion chamber, characterized in that based on a direction of flow of the to be discharged Smoke gases (34) in the end region of at least through the underside of a hotplate (12) and limited by the upper boundary plate (35) of a baking compartment (19) Flue gas duct (37) is provided a bypass device (41), by means of which a direct Deriving at least part of the flue gas flow in the flue gas duct (37) to one Flue gas outlet of the furnace body (1) and / or an at least partial diversion the flue gases (34) in a flue gas flue (43) connected downstream to act upon additional, outer surface areas of the baking compartment (19) with the hot flue gas (34) is adjustable if necessary. Cooking and / or baking stove according to claim 1, characterized in that the between the underside of the hotplate (12) and the upper limiting plate (35) of the baking compartment (19) trained flue gas duct (37) in the combustion chamber (6) when the Pellets (4) resulting smoke gases (34) collected in the area of the diverter (41). Cooking and / or baking stove according to claim 1 or 2, characterized in that referring on a front view of the furnace body (1) the receiving shell (26) a lower Corner area of the baking compartment (19) and the diverting device (41) this corner area of the baking compartment (19) diagonally opposite, upper corner area of the baking compartment (19) is assigned. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that in a first position of the diverter (41) Underside of the hotplate (12) and a wall part of the walls of the baking compartment (19) the flue gases (34) is applied. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that at least in a second position of the diverter (41) an additional wall part of the baking compartment (19) with the smoke gases (34) is. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that in addition in the second position of the diverter (41) at least that opposite the first baking compartment wall next to the receiving shell (26) Baking compartment wall (44) of downward flowing smoke gases (34) on the outer Surface is applied. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the flue gas flue (43) extending the flue gas duct (37) through a largely parallel to the baking compartment wall (44) and / or to the baking compartment bottom (45) arranged smoke guide element is formed. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the flue gas flue (43) by an essentially in cross section right-angled flue gas guide element and through the outer surface of the baking compartment wall (44) and / or the baking compartment base (45) in a direction transverse to the flue gas flow Direction is limited. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the flue gas flue (43) in a first end region to the Diverter (41) connects and in a second end area with the suction fan (40) is coupled. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the flue gas flue (43) is designed as a counter-pull, which deflects the flue gases (34) below the bottom of the baking compartment (45) and under the opposite Flow direction in the area of the diverter (41) to the suction fan (40) leads. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that a vertically oriented partition wall in the furnace body (1) (56) is provided, which extends from its bottom area to the bottom the hotplate (12) extends and in the oven body (1) a rear part chamber (60) and forms a front part chamber (61). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the baking compartment (19) passes through the partition (56) and a Baking compartment rear wall (59) is arranged in the rear partial chamber (60). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the baking compartment rear wall (59) is part of the vertical Partition (56) in the furnace body (1) forms. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the diverter (41) by means of a flap (63) optionally closable opening (64) is formed in the partition (56). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the lockable and unlockable by means of the flap (63) Opening (64) in the end area of the flue gas duct (37) between the hotplate (12) and the upper boundary plate (35) of the baking compartment (19) is arranged. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the opening (64) refers to one of the receiving shell (26) closest, first corner area of the baking compartment (19) in one to this first corner area diagonally opposite corner area of the baking compartment (19) in the partition (56) is arranged. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that in one of the receiving shells (26) opposite another opening (62) for transfer in the lower corner region of the baking compartment (19) the flue gases (34) from the flue gas flue (43) or from the front partial chamber (61) in the rear part chamber (60) is arranged. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that referring to the front view of the cooking and / or Baking oven (2) laterally to the combustion chamber (6), the hotplate (12), the flue gas duct (37) and / or the oven part (55) of the storage container (5) comprising the baking compartment (19) is arranged for the pellets (4). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the storage container (5) referring to a front side of the furnace body (1) is arranged behind the hearth part (55). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that based on the front view of the furnace body (1) Combustion chamber (6) is arranged between the storage container (5) and the baking compartment (19). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that between the facing wall parts of the storage container (5) and the hearth part (55) at least one cooling channel (51) for flowing through of cooling air (52) is arranged. Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the side wall parts (8, 9) and / or the rear wall part (10) and / or hold at least one combustion chamber wall at least one heat exchanger (69) or are formed by a heat exchanger (69). Cooking and / or baking stove according to one or more of the preceding claims, characterized in that the heat exchangers (69) are gas-liquid heat exchangers (71) are formed and for a circulation of a liquid medium (70) for Structure of a heating circuit with the heat exchangers (69) are provided. Cooking and / or baking stove for use in kitchen areas, characterized in that that a pellet heat source (33) comprising at least one combustion chamber (6) and one preferably arranged behind it storage container (5) for storing pellets (4) as reusable module is built, on the one hand with appropriate cladding parts can be used as a pellet stove for heating purposes and on the other side a stove part (55) without its own combustion chamber (6) can be coupled and thereby as a heat source serves for the stove part (55).

Images