EP3483501A1 - Small fire system - Google Patents

Abstract

Small fire system, in particular a stove, with a combustion chamber (2), a fuel storage space (3) and a conveyor (4) for conveying fuel (5) from the fuel storage space (3) in the combustion chamber (2), wherein the conveyor (4) Conveying the fuel (5) at least one by a drive means (7, 8) movable conveying means (6), wherein the small fire system at least two drive means (7, 8) and the conveying means (6) selectively by one of the at least two drive means (7 , 8) is movable.

Description

The invention relates to a small fire system, in particular a stove, with a combustion chamber, a fuel storage space and a conveyor for conveying fuel from the fuel storage space into the combustion chamber, wherein the conveyor for conveying the fuel has at least one movable by a drive means.

Such small fire systems, especially stoves, fireplace inserts, furnace inserts and the like, are basically known from the prior art. The feeding of a combustion chamber with fuel, in particular solid fuel, can take place under the influence of gravity. Alternatively or additionally, it is possible to carry out or at least assist the charging of the combustion chamber with fuel by means of a delivery device, which delivery device is designed to convey fuel from a fuel storage space via a transitional region into the combustion chamber. A corresponding conveying device can for this purpose have at least one, for example roller-like, conveying means which can be moved by a drive device in order to carry out or at least assist the delivery of the fuel.

In order to operate the corresponding drive means, an energy source is required, for example an electrical energy source, which supplies a corresponding electric drive device with energy. Furthermore, furnaces have been proposed which have mechanical drive means to ensure the operation of the small fire system, in particular the charging of the combustion chamber with fuel, regardless of electrical energy sources. In particular, if the supply of a drive device with electrical energy can not be ensured, a continuous fire or an automatic burnup of the fuel could be interrupted. For example, in the event of fluctuations or interruptions in an electrical supply network, the supply of fuel could be interrupted and the combustion process in the combustion chamber thus come to a standstill.

Depending on the required volume of solid fuel or one required amount of solid fuel, the conveyor can be moved at different speeds to promote the appropriate amount, for which different amounts of energy are needed. If the conveyor is moved to achieve a certain flow rate of fuel correspondingly fast, the associated amount of energy from the energy source, such as an energy storage, taken. The energy must be tracked into the energy storage, so that the energy available in the energy storage is not completely used up. Otherwise, the conveyor could no longer be driven, whereby no further solid fuel of the combustion chamber can be supplied and the burnup would be interrupted or stopped. In such scenarios, an operator would need to charge the electrical energy storage or "charge" or "wind up" the mechanical energy store. In particular, if such a "loading" by the operator fails or the state of charge of the energy storage, for example, reached overnight, a critical value, the continuous supply of the drive means could be interrupted with energy, so that the combustion process in the small fire system would come to a standstill.

The invention is therefore based on the object to provide a small fire system, in which the supply of fuel is ensured improved in the combustion chamber.

The object is achieved by a small fire system of the type mentioned, in which according to the invention the features of claim 1 are provided. Advantageous developments of the invention are the subject of the dependent claims.

The invention is based on the recognition that the small fire system has at least two drive devices and the conveying means is selectively movable by one of the at least two drive means. Thus, compared to the conventional small fire systems, which have no or only one drive means provided to provide at least two drive means for the drive of the conveyor. The conveyor can be selectively moved by at least one of the at least two drive means, so that a redundancy is created if one of the at least two drive means fails or can no longer be supplied with energy.

It is therefore particularly possible to choose with which of the at least two drive means the conveyor is to be driven or moved. Thus, it is possible, for example, in scenarios in which a state of charge of one of the at least two drive devices supplying energy storage is below a defined value to drive the funding by means of the other (powered by another energy source) drive means to negative effects on the combustion process in the Small fire system, in particular an interruption of the burn, to avoid or prevent.

In addition, it is also possible to provide the at least two drive devices such that they cover different power ranges. In this case, the conveyor, for example, at a constant speed, optionally be driven by the at least two drive means. Depending on the required amount of solid fuel and thus depending on the speed at which the conveyor is to be driven, a selection of the drive means used to drive the conveyor can be made. As the demand for solid fuel increases, so does the rate at which the delivery means must be moved to deliver the corresponding solid fuel from the fuel storage space to the combustion chamber. In this case, the drive can be changed from a first drive means to a second drive means. It is also possible to switch back to the first drive device in case of a drop in the demand for solid fuel, so if the funding is to be moved less quickly.

Alternatively or additionally, it may be provided in the small fire system that the conveying means is movable by one of the at least two drive means in response to a state of charge of at least one of the at least two drive means associated energy storage. According to this embodiment of the small fire system is provided to monitor a state of charge of an energy storage, which is one of at least two Drive devices is assigned. The corresponding energy store supplies the drive device, which is associated with this, with energy.

Thus, if the energy storage is charged via a defined state of charge, the drive means, which is associated with the energy storage, are supplied with energy and the funding is driven by the corresponding drive means. If the state of charge of the energy store drops below a defined (lower) threshold value, the conveying means can be driven by means of at least one second drive device which is assigned a second (other) energy store and supplies it with energy. Sonach, for example, a control device is provided which monitors the state of charge of at least one energy storage or a power source and when falling below a defined (lower) threshold, the drive of the conveyor to the at least one second drive means surrounds. It is also possible to output the state of charge, in particular visually, so that it can be displayed to the user, for example on a display device. Depending on the state of charge, the user can decide from which of the available drive devices the conveyor is driven.

Of course, it is possible, for example when the energy storage of the first drive device is charged after a change of the drive means to a second drive means, when a defined (upper) threshold value is exceeded, to switch back to the first drive means. In other words, it is thus possible that the energy storage is charged after the change, which is associated with the first drive means, that is, the drive device that has originally driven the funding. If the state of charge of the first energy store again reaches or exceeds a defined (upper) threshold value, it is possible to let the conveyor move again by the first drive device, for example until the first energy store is discharged again up to the defined (lower) threshold value. In the context of this application, reference is made to first energy store, first drive device or second energy store and second drive device, the assignment being arbitrary and being exchanged can. Finally, it should be clarified once again that in particular at least two drive devices are provided, which are supplied with (different) energy storage with energy to selectively drive the conveyor.

In this case, in addition to the state of charge of an electrical energy store, such as a battery or a battery, a state of charge of a mechanical energy storage, in particular a memory potential energy, such as a clock, are monitored. The state of charge of the mechanical energy storage indicates according to how much potential energy is stored, for example how far the movement is wound up. The state of charge can be specified, for example, in relation to a maximum available state of charge (for example, in percent). It is also possible (depending on the speed of the conveyor) to specify a remaining drive duration of the conveyor or, in particular in the case of electrical energy stores, to output the usual values (in particular the voltage) of the energy store.

It is likewise possible for at least one of the at least two drive devices to be supplied with energy by a static energy source, for example an available electrical supply network. The drive device supplied with the static energy source or the supply of the drive device by means of the static energy source can be used if this is currently available and preferably the charging states of the remaining available energy stores that are assigned to the same drive device and / or the other drive devices below whose defined (lower) thresholds are. Ultimately, therefore, a prioritization of the individual energy sources can be specified by means of which it can be decided in which order the individual energy sources, for example energy storage, are to be used to supply the corresponding drive device or with which drive device the conveyor should preferably be driven.

The small fire system can also be further developed to the effect that the at least two drive means via a respective coupling with the Subsidies are coupled. The corresponding coupling establishes a detachable connection between the drive device and the conveying means, thereby ensuring that the conveying means can be selectively driven by one of the at least two drive devices. Depending on which drive means the conveyor is currently driven, the closed state of the proposed clutches is set.

Accordingly, the coupling, by means of which the corresponding drive device is coupled to the conveying means, can be selectively released or closed in order to establish the mechanical connection between the drive device and the conveying means. It is also possible to connect at least one of the at least two drive devices via a fixed, ie always closed, coupling with the conveyor, wherein the corresponding at least one further drive means is connected via its associated coupling with the conveyor, if the conveyor with the further drive means is driven and a drive of the conveyor does not take place with the first drive means.

According to a further embodiment of the small fire system, the couplings with which the at least two drive means are coupled to the conveyor, as a freewheel, in particular as a sleeve freewheel, be formed, wherein the coupling between the conveyor and drive means in a movement of the conveyor against the drive direction of the respective drive means and / or in a relative movement of the conveyor in the drive direction relative to the respective drive means is releasable.

The corresponding coupling thus acts only in one direction of rotation or as a function of the rotational speeds of the respective drive device and the conveying means. At a speed of the conveyor, which is greater than the speed of the corresponding drive means, the connection between the conveyor and drive means is released automatically by the freewheel. Thus, it is possible to arrange the two drive means, for example, at two end regions of the conveyor or connected to the conveyor shaft (s) or releasably connect via the corresponding coupling.

The conveyor can thus be selectively driven by one of the two drive means, wherein the respective other drive means is preferably decoupled, so that the drive of the conveyor and thus the executed movement of the conveyor of the respective other drive means, which does not currently drive the conveyor is not affected ,

According to a development of the small fire system, the drive directions of the two drive devices are the same or opposite to each other. The conveyor may be formed, for example, as a roller, wherein the drive means are coupled via corresponding couplings with the conveyor. By choosing the points of attack on different sides of the conveyor, for example at opposite end portions of the conveyor, the directions of rotation, or drive directions in general, the two drive means can be chosen opposite each other.

It is also possible, for example for reasons of space, to arrange the at least two drive devices on the same side with respect to the conveyor. In this case, optionally, a direction reversal of the drive directions of one of the (or both) drive means are made, so that it is ensured during operation of the drive means that the conveying means moves in the conveying direction. In this case, the conveying direction designates that direction of movement, in particular the direction of rotation of the conveying means, through which fuel is conveyed via the conveying means into the combustion chamber. For this purpose, at least one reversing element can be provided, which is designed to translate a direction of movement of at least one of the two drive devices into a movement of the conveying device in the conveying direction.

In other words, the conveying means can optionally be set in rotation by at least one of the two drive devices. One of the two drive devices can consequently be designed to carry out a counterclockwise rotational movement and the other drive device can be designed to carry out a clockwise rotational movement.

For example, the two drive devices can thus act on the two ends of a roller-shaped conveyor or be arranged and be selectively coupled via the associated couplings with the funding. Since the conveying means for conveying the fuel into the combustion chamber basically has to be driven in the same direction, the drive devices have different drive directions, so that one drive device performs a left-handed rotation and the other drive rotates clockwise and thus the conveyor is always driven in the same conveying direction.

A further advantageous embodiment of the small fire system can provide that the conveyor is formed at least partially as a hollow shaft, wherein at least one of the two clutches is at least partially formed as engaging in the hollow shaft or that at least one of the two clutches at least partially formed as a hollow shaft, wherein the conveyor is at least partially formed as engaging in the hollow shaft shaft. Of course, the coupling can also be at least partially regarded as part of its associated drive means or the conveyor and be designed in one piece with it. Basically, it is possible according to this embodiment, the funding form such that this allows a releasable coupling with the respective drive means. Accordingly, the conveying means may be formed in a section as a hollow shaft, in which hollow shaft engages a shaft connected to the corresponding drive means. As such, the clutch comprises the hollow shaft and the shaft.

Conversely, it is also possible to form the conveyor at least in sections as engaging in the hollow shaft, wherein the coupling is designed as a hollow shaft. Sonach can therefore be provided, for example, encompassed by the drive means and thus driven hollow shaft into which engages a portion of the conveying means, which is designed as a hollow shaft. Finally, the terms shaft or solid shaft or hollow shaft are to be understood in such a way that a component defined as a hollow shaft engages around the other component at least in sections and thus that a releasable connection between the two components can be produced. The shaft in the hollow shaft itself can of course also be made hollow, with ultimately only means are present, which allow a connection between the shaft and the hollow shaft, so that a selective coupling of the corresponding drive means with the funding is possible. A corresponding connection may be a positive and / or non-positive connection, which in particular is selectively detachable.

In principle, any drive device which is designed to set the conveying means into a suitable conveying movement can be provided as the drive device. In particular, at least one electric drive device and / or at least one mechanical drive device can be provided, which are designed to move the conveyor. Thus, a redundancy can be created, since two different drive means can be provided, which are fed by means of different energy sources. Thus, depending on the application, a mechanical drive device may be provided if the electrical energy source that powers the electric drive device is not available or fails or the corresponding state of charge of the electrical energy storage device falls below a defined (lower) threshold.

In addition, it is also possible that an electric drive device is provided, which takes over the drive of the conveyor, if the mechanical drive device fails or the state of charge of the mechanical energy storage device falls below a defined (lower) threshold. Ultimately, therefore, any combination of two different drive devices, in particular the combination of an electric drive device and a mechanical drive device is possible. The thus ensured redundancy with regard to the drive of the conveyor ensures a continuous operation of the small fire system, even if one of the two energy sources fails or is temporarily unavailable.

With regard to the above-described embodiment of the small fire system, it may further be provided that the couplings are designed to be the electrical drive device to decouple in a drive of the conveying means by means of the mechanical drive means and to decouple the mechanical drive means in a drive of the conveying means by means of the electric drive means. Accordingly, it is provided that the funding must ultimately be driven only by one of the two drive means to ensure delivery of solid fuel from the fuel storage space into the combustion chamber. Correspondingly, it can be determined, for example via a suitable control device, which in particular has corresponding sensors or receives the detected data, from which of the two drive devices the conveyor is driven or to what extent a drive of the conveyor by means of the electrical and / or mechanical drive device currently possible is.

On the basis of the above-described determination, it can be selected from which of the two drive devices, in particular the mechanical or the electric drive device, the conveyor is to be driven. It can be considered in particular whether the energy storage or the energy source, which is assigned to the respective drive device, is currently available and has a suitable state of charge. Particularly preferred is an embodiment, according to which the operation is preferably carried out by means of the mechanical drive means and when a falling below a defined (lower) threshold of the state of charge of the mechanical energy storage, a drive of the conveyor is switched to the electric drive means. The electric drive device is fed by an electrical energy source. The electrical energy source may be an electrical energy store and / or an electrical supply network, in particular a power grid. Particularly preferably, the electrical energy source both an electrical energy storage, in particular an accumulator, on, wherein the electrical energy source above a defined (upper) threshold of the state of charge of the electrical energy storage energy through the electrical energy storage energizes the electric drive device and below a (lower) threshold the state of charge of the electrical energy storage device, the electric drive device by electrical energy fed from the electrical supply network.

Thus, according to the above-described embodiments, it is preferred that the mechanical drive device can be supplied by means of a mechanical energy store which uses the, in particular potential, energy of a mass element and / or a spring element. The corresponding mechanical energy store can be particularly preferably charged by an operator or an operator of the small fire system by the mechanical energy storage is "reared", for example via a hand crank. The mechanical drive device may, for example, have a movement or be designed as such, so that the corresponding movement can be wound by the user, for example, when a defined (lower) threshold value of the state of charge of the movement is exceeded.

Accordingly, the electric drive device can be supplied with energy from an electrical energy source, in particular from an electrical energy store. As described above, alternatively or additionally, the electrical energy source may also provide for feeding the electrical drive device with electrical energy from a (static) electrical supply network. Of course, it is also possible to supply the electric drive device and / or the mechanical drive device with a plurality of suitable, in particular mechanical and electrical energy sources.

According to a further embodiment of the small fire system, at least one recovery device can be provided, which is designed to recover energy from a combustion process taking place in the small fire system and at least one of the two drive devices and / or one of the energy sources, in particular the mechanical energy storage and / or the electrical Energy storage to supply.

Accordingly, it is contemplated that the recovery device recovers energy from the combustion process performed in the small fire system. The recovered energy can then be used to one of the two drive means, such as the mechanical drive means and / or the electric drive means to supply, in particular to move the conveying means by means of said drive means. Alternatively or additionally, the recovered energy can also be supplied to the respective energy stores, in particular the mechanical energy store and / or the electrical energy store, in order to increase their charge state. The selection as to which of the two energy storage devices or which of the two energy storage devices the recovered energy is to be supplied may, in turn, be made dependent on the corresponding state of charge of the respective energy storage or on which drive means the delivery medium is currently being moved. Basically, the selection can also be made based on a prioritized prioritization.

The recovery device may, for example for energy recovery, have a flow element which can be moved by means of an exhaust gas flow and which is arranged in an exhaust gas guidance device of the small fire system leading to an exhaust gas flow generated during a combustion process. The corresponding recovery device therefore has a flow element which is at least partially disposed in the exhaust gas flow. In a corresponding combustion process, the exhaust gas flow is thus generated or conducted in such a way that it at least partially flows against the at least one flow element and thus sets it in motion. The exhaust gas stream can be guided, for example, in an exhaust gas guide device of the small fire system, in particular in a smoke tube. The movable flow element arranged in the smoke tube is thus moved by the generated exhaust gas flow, energy being recovered from the movement of the flow element. The corresponding flow element can in particular be designed as a rotating turbomachine, for example as a turbine, wherein energy of the flowing fluid, that is the exhaust gas flow, is converted into mechanical energy, in which the movable flow element is moved, in particular rotated.

Thus, the recovered energy can be converted into mechanical energy and / or electrical energy, so that it for the operation of the electric drive device and / or the mechanical drive device is available. Furthermore, the correspondingly converted energy can also be supplied to the mechanical and / or electrical energy store in order to increase its charge state.

According to a further embodiment of the small fire system, a vibrating element forming a part of a vibrating device can be provided, which is movable relative to the grate, wherein the vibrating element comprises a vibrating element basic body, wherein the vibrating element by means of one of the at least two drive means or by means of a separate Drive device is movable. By means of the intended shaking device it is achieved that solid fuels can not accumulate on the grate or that solid fuels accumulated on the grate can be distributed by a shaking movement generated by means of the shaking element. Likewise, residues of the combustion process, such as ash, can be separated and removed by the shaking movement of the solid fuel. Thus, a sufficient supply of air is ensured in the operation of the small fire system, resulting in reduced emissions and a lower solid fuel consumption. Preferably, the Rüttelelementgrundkörper a pointing in the direction of the combustion chamber upper edge and at least one of which angularly projecting side edge.

In addition to the possibility to move the vibrating element manually or by means of a separate drive means, it can be provided to move the vibrating element with one of the at least two drive means which are provided for the selective movement of the conveying means.

The above-described embodiment of the small fire system can be further developed to the effect that the vibrating element is driven directly or via a transmission with a defined translation simultaneously with the conveyor or that at least one drive means is selectively coupled to the conveyor and the vibrating element.

Accordingly, it is provided that the vibrating element simultaneously with the Conveyor is driven, wherein the corresponding drive means can drive the vibrating element and the conveyor uniformly or it can be provided a transmission which carries out a defined translation of the provided by the drive means movement. In particular, it can be provided that a rotational movement provided by the drive device is converted into a vibrating motion, for example a longitudinal movement, in particular into a reciprocating movement of the vibrating element. It can be achieved by the transmission, for example, that the vibrating element performs a faster compared to the rotational movement of the conveyor faster movement.

Alternatively, selective or selective driving of the vibrating element and the conveying means may be effected by selectively coupling the driving means to the vibrating element or the conveying means. Sonach is a drive of the Rüttelelements with stationary funding and vice versa realized.

In addition, the invention relates to a conveyor for a small fire system, in particular a small fire system according to one of the preceding claims, which conveyor is adapted to convey fuel from a fuel storage space in a combustion chamber of the small fire system, wherein the conveyor has at least two drive means and a conveyor, wherein the Conveyor is selectively movable by one of the two drive means.

Furthermore, the invention relates to a method for operating a small fire system, in particular a small fire system according to the invention, as described above, or a small fire system with a conveyor according to the invention. The corresponding small fire system therefore has a combustion chamber, a fuel storage space and a corresponding delivery device for conveying fuel from the fuel storage space into the combustion chamber, wherein the conveying device for conveying the fuel has at least one conveying means movable by a drive device, wherein the conveying means is optionally provided by one of at least two drive means is moved.

Of course, all embodiments, in particular to the advantages, details and features that have been set forth with respect to the inventive small fire system, completely transferable to the conveyor according to the invention and the inventive method. In particular, the method according to the invention can be carried out on the small fire system according to the invention.

Fig. 1

eine erfindungsgemäße Kleinfeueranlage gemäß eines ersten Ausführungsbeispiels;

Fig. 2

eine erfindungsgemäße Fördereinrichtung;

Fig. 3

eine Kupplung der erfindungsgemäßen Fördereinrichtung aus Fig. 2; und

Fig. 4

eine erfindungsgemäße Kleinfeueranlage gemäß eines zweiten Ausführungsbeispiels.

The invention will be explained in more detail by means of embodiments with reference to the drawings. The drawings are schematic representations and show:

Fig. 1

a small fire system according to the invention according to a first embodiment;

Fig. 2

a conveyor according to the invention;

Fig. 3

a coupling of the conveyor according to the invention Fig. 2 ; and

Fig. 4

a small fire system according to the invention according to a second embodiment.

Fig. 1 shows a small fire system 1, for example, a stove. The small fire system 1 has a combustion chamber 2, a fuel storage space 3 and a conveyor 4 for conveying fuel 5 from the fuel storage space 3 into the combustion chamber 2. The conveying device 4 has a movable conveying means 6 for conveying the fuel 5 from the fuel storage space 3 into the combustion chamber 2. The conveyor 6 is optionally by one of two drive means 7, 8 (see. Fig. 2 ) movable.

In other words, fuel 5 can be conveyed from a fuel storage space 3 into the combustion chamber 2 in a targeted manner by means of the delivery device 4. Depending on the speed with which the conveying means 6, for example a roller, is driven, fuel 5, for example solid fuel pellets, is fed to the combustion chamber 2. The loading of the combustion chamber 2 with fuel 5 can thus via a suitable setting the drive speed of the conveyor 6 are controlled.

Fig. 2 shows a detailed representation of the conveyor 4. It is apparent that fuel 5 is conveyed by gravity via a ramp to the conveyor 6, from where it is conveyed by a rotational movement of the conveyor 6 to a further ramp, the 5 conveyed by means of the conveyor 6 fuel the combustion chamber 2 supplies. In order to drive the conveying means 6, the conveying device 4 has two drive devices 7, 8, which can be coupled or coupled to the conveying means 6 via corresponding couplings 9, 10. The clutches 9, 10 are designed as a freewheel, in particular as a sleeve freewheel, and couple a connected to the conveyor 6 shaft 11 optionally with the drive means 7 or the drive means eighth

The drive device 7 is designed as a mechanical drive device and performs a clockwise rotational movement, which is represented by an arrow 12. The mechanical drive device 7 is powered by a mechanical energy storage 13 with energy. The mechanical energy store is designed for example as a spring element, wherein the potential energy of the spring element in the energy storage 13 is used to provide the drive means 7 with energy, so that they can put the shaft 11 and thus the conveyor 6 in a rotary motion.

In the opposite end region of the shaft 11, the drive device 8 is coupled via the coupling 10 with the shaft 11. The drive device 8 is designed as an electric drive device and performs a left-handed movement, which is represented by an arrow 14. The drive device 8 is connected to an electrical energy store 15, for example an accumulator, and an electrical energy source 16, for example an electrical supply network, and is supplied with electrical energy by these. The two drive devices 7, 8 are connected to a control device 17, which is designed to control the drive devices 7, 8. In particular, the control device 17 controls which of the two drive devices 7, 8 causes the shaft 11 and thus the conveying means 6 to rotate. Of course, the movement of the conveyor 6 can also be suspended when no fuel is needed. Finally, the conveying means 6 can thus be moved as a function of a fuel demand determined, for example, by means of a sensor assigned to the control device 17.

The control device 17 also has corresponding sensors (not shown) which provide information about the state of charge of the energy storage devices 13, 15 or the availability of the electrical energy source 16. Furthermore, corresponding sensors can provide information about the combustion process taking place in the combustion chamber 2, in particular the fuel requirement, that is to say a required quantity of fuel 5.

Fig. 2 shows further that a recovery device 18 is provided, which has a movable flow element 19 which is arranged in an exhaust gas flow 20. For example, the flow element 19 is arranged in a flue pipe 21 leading to the exhaust gas flow 20 and is accordingly flowed around by the exhaust gas flow 20. The exhaust stream 20 is generated by the combustion of the fuel 5 in the combustion chamber 2, wherein the flow element 19 is set by the flow of the flow member 19 in a rotational movement. Thus, 20 energy can be recovered from the exhaust stream. The recovered energy can be the energy storage 13, 15 and the drive means 7, 8 are supplied.

In order to promote fuel 5 in the combustion chamber 2, therefore, the conveyor 6 is driven by the drive means 7 or the drive means 8. Depending on which drive means 7, 8, the conveyor 6 is driven, closes one of the two clutches 9, 10 and thus provides a mechanical connection between the drive means 7, 8 and the shaft 11 ago. The control device 17 controls the operation of the drive devices 7, 8 as a function of the available energy, in particular depending on the state of charge of the energy storage 13, 15, the availability of the electrical energy source 16 and the availability of recovered by means of the recovery device 18 electrical or mechanical energy. The recovered energy provided by the recovery device 18 may be used to to increase the state of charge of the mechanical energy storage device 13 and / or the state of charge of the electrical energy storage device 15. Of course, the state of charge of the electrical energy store 15 can also be increased by means of the electrical energy source 16. Increasing the state of charge can also be referred to as "charging" or "mounting".

The state of charge of the mechanical energy accumulator 13 can be further increased by a user, for example by means of rotation of a hand crank. In particular, it may be provided that the conveyor 6 is preferably driven by one of the two drive means 7, 8, wherein the other drive means 7, 8 is provided as redundancy or as protection.

For example, the conveyor 6 is preferably driven by means of the drive device 7, wherein the control device 17 switches the drive of the conveyor 6 to the drive device 8, if a state of charge of the mechanical energy storage 13 drops below a defined (lower) threshold. Accordingly, the conveying means 6 can subsequently be driven by means of the electric drive device 8, which can be fed, for example, from the electrical energy store 15 and / or from the electrical energy source 16.

Of course, a drive of the conveyor 6 with a changed, in particular reverse priority order is also possible, so that the conveyor 6 is preferably moved by means of the drive means 8, which is fed by an electrical supply network 16. In case of failure or temporary lack of availability of the power source 16, the drive means 8 can be operated for example by means of the electric energy storage 15. If the state of charge of the electrical energy store 15 drops below a (lower) threshold value, the control device 17 can undertake the operation or the drive of the conveying means 6 by means of the drive device 7, which is fed by the mechanical energy store 13.

Of course, the aforementioned embodiments can be combined as desired.

In particular, the provision of recovered energy with the recovery device 18 can be arbitrarily combined with the operation of the other available energy storage devices 13, 15 or the electrical energy source 16.

Fig. 3 shows an example of a coupling 9, 10 of the conveyor 4 from the Fig. 1 . 2 , The coupling 9, 10 has a hollow shaft designed as a first shaft 22 which is fixedly connected, for example, with the shaft 11 or part of the shaft 11. Further, the coupling 9, 10, a second shaft 23 which is fixedly connected to one of the two drive means, which is associated with the corresponding coupling 9, 10 or part of the corresponding drive means 7, 8.

Obviously, the in Fig. 3 shown coupling 9, 10 designed as a sleeve freewheel and thus has a reverse direction, for example in the right-handed direction. Thus, it is possible, in a drive with the clutch 9, 10 associated drive means 7, 8 transmit torque from the shaft 23 to the shaft 22 and thus to the conveyor 6.

If the corresponding drive device 7, 8 is not driven, but the conveying means 6 is driven by the respective other drive means 7, 8, the connection is separated by means of the coupling 9, 10, so that the shaft 23 is not connected to the shaft 22. Thus, the coupling 9, 10 in each case a movement of the conveying means 6 by means of the respective other drive means 7, 8 to. The connection between the shafts 22, 23 is closed if the drive means 7, 8 associated with the coupling 9, 10 is used to move the conveyor 6 (and there is no speed difference between the shaft 23 and the shaft 22). The coupling 9, 10 off Fig. 3 is merely an example. Of course, the direction of the reverse direction is to be selected depending on the direction in which the conveyor 6 is to be moved or on which side of the shaft 11, the coupling 9, 10 is arranged. An oppositely selected blocking direction is therefore to be selected for the respective other coupling 9, 10.

Fig. 4 shows a small fire system 24 according to a second embodiment.

The small fire system 24 is basically constructed analogously to the small fire system 1, which is why the same reference numerals for the same components are used. The small fire system 24 additionally has a vibrating element 25, which is arranged in the region of a grate of the small fire system 24. The vibrating element 25 is movably mounted relative to the grate, in the manner of a vibrating mandrel. By a shaking movement of the vibrating element 25, fuel 5 accumulated on the vibrating element 25 can be better distributed. Further, by such a shaking movement accumulated combustion residues, such as ash, separated from the fuel 5 and can be removed improved.

In order to set the vibrating element 25 in a suitable shaking movement, the conveyor 4 is assigned a gear 26. According to this embodiment, one of the two drive means 7, 8 of the conveyor 4 can be coupled to the vibrating element 25. In this case, the vibrating element 25 is preferably coupled to the electric drive device 8. The drive device 8 can thus be selectively coupled to the conveyor 6 or, in particular via the gear 26 with the Rüttelelement 25. Thus, by the drive device 8, a shaking movement, in particular a reciprocating movement of the vibrating element 25 are generated. The gear 26 is designed to adjust the speed of the shaking movement of the vibrating element 25. In particular, the speed of the shaking movement of the vibrating element 25 relative to the conveying speed of the conveying means 6 can be performed faster. Of course, it is also possible to drive by means of the drive means 8, the conveying means 6 and the vibrating element 25 at the same time.

LIST OF REFERENCE NUMBERS

1

Consumer fireworks plant

2

combustion chamber

3

Fuel reservoir

4

Conveyor

5

fuel

6

funding

7

driving means

8th

driving means

9

clutch

10

clutch

11

wave

12

arrow

13

energy storage

14

arrow

15

energy storage

16

energy

17

control device

18

Recovery device

19

flow element

20

exhaust gas flow

21

flue pipe

22

wave

23

wave

24

Consumer fireworks plant

25

shaking element

26

transmission

Claims (18)

Small fire system (1, 24), in particular a stove, with a combustion chamber (2), a fuel storage space (3) and a conveyor (4) for conveying fuel (5) from the fuel storage space (3) into the combustion chamber (2), wherein the Conveying device (4) for conveying the fuel (5) at least one by a drive means (7, 8) movable conveying means (6), characterized in that the small fire system (1, 24) at least two drive means (7, 8) and the Conveying means (6) optionally by one of the at least two drive means (7, 8) is movable. Small fire system according to claim 1, characterized in that the conveying means (6) in response to a state of charge of at least one of the at least two drive means (7, 8) associated energy storage (13, 15) of one of the at least two drive means (7, 8) is movable , Small fire system according to claim 1 or 2, characterized in that the at least two drive means (7, 8) via a respective coupling (9, 10) are coupled to the conveying means (6). Small fire system according to claim 3, characterized in that the clutches (9, 10) with which the at least two drive means (7, 8) are coupled to the conveying means (6) are designed as freewheels, in particular as barrel freewheels, wherein the coupling ( 9, 10) between conveying means (6) and drive means (7, 8) in a movement of the conveying means (6) against the drive direction of the respective Drive device (7, 8) and / or in a relative movement of the conveying means (6) in the drive direction relative to the respective drive means (7, 8) is releasable. Small fire system according to one of the preceding claims, characterized in that the drive directions of the two drive means (7, 8) are equal or opposite to each other. Small-fire system according to one of the preceding claims, characterized in that the conveying means (6) is selectively displaceable by at least one of the two drive means (7, 8) in a rotational movement, wherein one of the drive means (7, 8) is adapted to perform a left-handed rotational movement and the other drive means (7, 8) is adapted to perform a clockwise rotational movement. Small fire system according to one of the preceding claims, characterized in that the conveying means (6) is at least partially formed as a hollow shaft, wherein at least one of the two clutches (9, 10) is at least partially formed as engaging in the hollow shaft shaft or at least one of the two Couplings (9, 10) is at least partially formed as a hollow shaft, wherein the conveying means (6) is at least partially formed as engaging in the hollow shaft shaft. Small fire system according to one of the preceding claims, characterized in that at least one electric drive means (7, 8) and / or at least one mechanical drive means (7, 8) are provided and adapted to move the conveying means (6). Small fire system according to claim 8, characterized in that the couplings (9, 10) are adapted to decouple the electric drive means (7, 8) in a drive of the conveying means (6) by means of the mechanical drive means (7, 8) and the mechanical Drive device (7, 8) during a drive of the conveying means (6) by means of the electric drive means (7, 8) to decouple. Small fire system according to claim 8 or 9, characterized in that the mechanical drive means (7, 8) by means of a mechanical energy storage device (13, 15) can be driven, which uses the, in particular potential energy, a mass element and / or a spring element. Small fire system according to claim 10, characterized in that the mechanical drive means (7, 8) has a clockwork or is designed as such. Small fire system according to one of claims 8 to 11, characterized in that the electric drive device (7, 8) of an electrical energy source (16), in particular an electrical energy storage device (13, 15), can be supplied with energy. Small fire system according to one of the preceding claims, characterized in that at least one recovery device (18) is provided which is adapted to energy from a running in the small fire system (1, 24) combustion process recover and at least one of the two drive means (7, 8), in particular the mechanical energy storage (13, 15) and / or the electrical energy storage (13, 15), supply. Small fire system according to claim 13, characterized in that the recovery device (18) for energy recovery by a flow of exhaust gas (20) movable flow element (19) leading in an exhaust gas flow generated during a combustion process (20) leading exhaust guide means (21) of the small fire system ( 1, 24) is arranged. Small fire system according to one of the preceding claims, characterized by a part of a vibrating device forming relative to a grate movably mounted vibrating element (25), wherein the vibrating element (25), in particular roof-like or -shaped, Rüttelelementgrundkörper, wherein the vibrating element (25) by means of a the at least two drive means (7, 8) or by means of a separate drive means is movable. Small fire system according to claim 15, characterized in that the vibrating element (25) can be driven directly or via a transmission (26) with a defined ratio simultaneously with the conveying means (6) or at least one drive means (7, 8) optionally with the conveying means (6 ) or the vibrating element (25) can be coupled. Conveying device (4) for a small fire system (1, 24), in particular a small fire system (1, 24) according to one of the preceding claims, which conveying device (4) is designed to fuel (5) a fuel storage space (3) in a combustion chamber (2) of the small fire system (1, 24) to promote, characterized in that the conveyor (4) at least two drive means (7, 8) and a conveying means (6), wherein the conveying means ( 6) is selectively movable by one of the two drive means (7, 8). Method for operating a small fire system (1, 24), in particular a small fire system (1, 24) according to one of claims 1 to 16, with a combustion chamber (2), a fuel storage space (3) and a conveying device (4) for conveying fuel ( 5) from the fuel storage space (3) in the combustion chamber (2), wherein the conveyor (4) for conveying the fuel (5) at least one by a drive means (7, 8) movable conveying means (6), characterized in that the Conveying means (6) optionally by one of at least two drive means (7, 8) is movable.

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