AT527553A1 - boiler - Google Patents

Abstract

The invention relates to a heating boiler (1) for logs, comprising a combustion chamber (3), above which a filling chamber (4) for the logs is arranged, wherein the filling chamber (4) has a hot chamber section (13) and a filling chamber lining (12), wherein the filling chamber lining (12) has openings (38) in at least one of the side walls (26 to 29), wherein projections (42) at least partially covering the openings (38) are arranged on an inner side of the side wall (26 to 29), and/or that the filling chamber lining (12) has a lower and an adjoining upper filling chamber apron (15, 16), wherein the lower filling chamber apron (16) has an air supply duct (30) with at least one change in the flow direction of the air at least on a first side wall (26) and/or that on at least one of the side walls (27, 29), preferably on two opposite side walls (27, 29), a heat conducting element (31) is arranged.

Description

room lining.

Furthermore, the invention relates to a lining element for a boiler for

Logs comprising a frame with several side walls.

Heating boilers for generating heat energy from logs are known from the prior art. For example, DE 198 26 492 A1 describes a heating boiler for generating useful heat from logs, wherein channels for the primary air are arranged in the lower filling shaft area of the boiler as closed hollow bodies. These channels open into small-area inlet openings for the primary air in the side wall facing the combustion chamber. The openings are located a short distance from the flame and ash outlet. The outer skin of the two shaped side walls of the primary air channel form the

Limitation of the combustion chamber.

EP 2 221 540 A2 describes a filling chamber lining for a boiler, wherein the lining comprises panels made of cast metal, which are arranged along the rising walls of the filling chamber, and in the heating zone of the filling chamber one or more lining panels are provided, which form primary air openings.

openings for the primary air to flow into the heating zone of the filling chamber.

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cher sub-brand.

In boilers with bottom combustion, the fuel chamber is at the top and the logs are lit at the bottom and then burned with the flame pointing downwards. This principle has been known for a very long time. However, the problem here is always the start-up of this process. The thermals in the fuel chamber counteract the flame downwards and can, under certain circumstances, lead to the flame disappearing at the bottom and the gas can no longer be burned properly. Very high emissions and heavy soiling of the boiler are the result. If the thermals in the fuel chamber are relatively uniform across the entire surface, no upward rotational flow is created in the fuel chamber and the logs do not burn one-sidedly upwards. This ensures clean combustion with low dust emissions.

and CO emissions possible.

When starting up, these boilers are lit on one side, and the bed of embers must spread evenly within the first hour. The smaller the boiler output in relation to the floor space of the fuel chamber, the more difficult this is. The boilers are usually built for logs 0.5 m long. Therefore, the base

area is only smaller in width, but the length remains the same.

The object of the invention is to provide a boiler with improved start-up

hold to be stated.

The object is achieved in the boiler mentioned at the beginning in that the filling chamber lining has openings in at least one of the side walls, wherein the openings are at least partially covered on an inner side.

cken projections are arranged, and/or that the filling chamber lining

a lower and an adjoining upper filling chamber apron, wherein

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the opposite side walls, a heat conducting element is arranged.

Furthermore, the object of the invention is achieved with the lining element mentioned at the outset, in which openings are arranged in at least one of the side walls, wherein projections are arranged on an inner side which at least partially cover the openings, and/or in which at least one first side wall at least partially forms an air supply channel with at least one change in the flow direction of the air and/or in that on at least one of the side walls, preferably on two opposite sides

walls, a heat conducting element is arranged.

When a boiler is started up, the fuel begins to burn in specific spots. The flame propagates and is intended to form an even bed of embers in this primary combustion zone. The lateral fuel chamber skirt with integrated change in the direction of air flow promotes an even buildup of embers, which can result in lower emissions and improved start-up of the boiler. By changing the flow direction of the supplied air (primary air), it can be fed preheated into the hot zone of the fuel chamber. If the fuel is burning in the front area of the fuel chamber (with fresh air supply), the air is preheated and enters the rear primary air zone already hot. If a fire occurs at the rear, the supplied air, which can then flow forward due to a reversal of the flow, is preheated. By preheating the supplied air at the inlet points, the heat is transferred to the fuel and dries it at the same time. As a result, it starts burning earlier, primarily in these areas. Additionally or alternatively, the heat conduction elements contribute to heat distribution through heat conduction, which also facilitates start-up.

of the boiler can be improved.

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can be.

To further improve these effects, according to an embodiment of the invention, it can be provided that the lower filling chamber apron has a further air supply channel with at least one change in the flow on at least one further side wall, which is in particular opposite the first side wall.

direction of air flow.

For a more even air distribution and thus also for the more even formation of a bed of embers, according to an embodiment variant of the invention it can be provided that the openings are arranged in the lower filling chamber apron, wherein in the first side wall first openings for the supply of air from the first air supply duct to the hot chamber section and in the further side wall further openings for the supply of air from the further

Air supply duct to the hot room section.

According to one embodiment of the invention, the first openings are offset from the other openings in the direction of air flow. As a result, the flow from the two side walls does not meet, or only meets at a few points. This can prevent

that the air in the filling chamber is pushed upwards.

In order to improve the effectiveness of the heat conducting element or elements, according to an embodiment of the invention, it can be provided that

the heat conducting element on the side wall of the filling chamber apron is thermally separated

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The heat can be distributed more quickly.

For the same reason, according to another embodiment of the invention, it can be provided that the heat conducting element is only positively connected to the side wall or is only suspended in the side wall

is.

For cooling the side wall, according to an embodiment of the invention, it can be provided that the side wall on which the heat conducting element is arranged

net, is arranged adjacent to a water jacket of the boiler.

For the reasons mentioned, according to a variant of the lining element, it can be provided that the frame is designed according to the lower

Filling chamber apron is designed as described above.

For a better understanding of the invention, it will be explained with reference to the following

The figures are explained in more detail. They show, in simplified, schematic representations: Fig. 1, a boiler;

Fig. 2 shows a section of a boiler in the area of the filling chamber in

front view; Fig. 3 shows a section of the boiler according to Fig. 2 in side view; Fig. 4 shows a plan view of a burn-through element;

Fig. 5 the burn-through element according to Fig. 4 in an oblique view;

Fig. 6 a lower filling chamber apron in oblique view;

Fig. 7 a heat conducting element;

Fig. 8 shows a detail of a boiler in side view;

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from the front.

By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations, whereby the disclosures contained in the entire description can be applied analogously to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional

information must be transferred to the new location in the event of a change in location.

Fig. 1 shows a boiler 1. The boiler 1 is designed for burning wood logs, in particular logs 2. However, it should be noted at this point that components of the boiler 1 can also be used for other solid fuels, in particular biomass, such as wood pellets, wood chips, etc., as will be described in the following.

standing is still being executed.

The boiler 1 has a combustion chamber 3. Above the combustion chamber 3 and in particular directly adjacent thereto, a filling chamber 4, for example a cuboid-shaped one, is arranged for the fuel, i.e. in this embodiment of the boiler 1 for the logs 2. In particular, the boiler 1 is designed as

so-called downdraft boiler.

A filling chamber door 5 is arranged on the filling chamber 4 for filling the logs 2. The combustion chamber 3 is accessible via a combustion chamber door 6.

accessible.

Furthermore, the boiler 1 has a flue gas duct to a chimney. An induced draught fan 7 may be arranged in the flue gas duct. Furthermore, the boiler 1 may have a heat exchanger 8 for recovering heat energy from the

flue gas, for which the heat exchanger 8 between the combustion chamber 3

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which may have a housing door 11.

Since the components of the boiler 1 mentioned are known from the relevant state of the art, further details should be given in order to avoid

In the case of repetitions, reference is made to this state of the art.

The filling chamber 4 has a filling chamber lining 12. The filling chamber lining is arranged on the filling chamber walls. For example, at least parts of the filling chamber lining 12 can be suspended from the filling chamber walls, as is

as can be seen from Figs. 2 and 3.

The filling chamber 4 also has a hot chamber section 13, which forms the lower section of the filling chamber 4. In the hot chamber section 13, the logs 2 are ignited, burn, or degas. Adjacent to the hot chamber section 13, in the upper part, is the so-called cold chamber section 14 of the filling chamber 4. In the cold chamber section 14, the fuel should not burn during normal operation of the boiler 1. The hot chamber section 13 ends

usually in the area of the primary air supply or a few cm above it.

As can be seen from Figs. 2 and 3, the filling chamber lining 12 comprises a lower filling chamber apron 15 and an upper filling chamber apron 16, or consists of the lower and upper filling chamber aprons 15, 16. The lower and/or upper filling chamber apron or the filling chamber lining can have single-part or multi-part lining elements per side wall of the filling chamber 4. The lower filling chamber apron 15 surrounds a glowing area of the filling chamber 4, i.e.

the hot room section 13.

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Hot room section 13 and cold room section 14 can be better realized.

A burn-through element 17 is preferably arranged between the hot space section 13 of the filling chamber 4 and the combustion chamber 3. Combustible gases from the hot space section 13 of the filling chamber 4 can pass through this burn-through element 17 into the combustion chamber 3, where they are then combusted.

delement 17 preferably consists of a metallic material.

For igniting the logs 2, i.e., the lowest logs 2, which are arranged closest to the burn-through element 17, one or more ignition elements 18 are provided. The ignition element(s) 18 are preferably arranged in the front area of the boiler 1. This has the advantage that in an emergency, for example, if there is no power supply, the boiler 1 can also be heated using a barbecue lighter or paper and matches, etc. In the preferred embodiment, however, the ignition element(s) 18 are electrical igniters that introduce hot air of up to 400°C into the heating chamber section 13. The ignition element(s) 18 can protrude into the heating chamber section 13 of the filling chamber 4 or blow the hot air into it. The ignition element(s) 18 can (each) be arranged in an ignition air channel 19 in order to provide sufficient oxygen for igniting the fuel.

to have.

As can be seen from Fig. 1, in the hot space section 13 at least two

Support elements 20, 21, namely a rear support element 20 and a front support element 21, for supporting the logs, i.e. the logs 2, are arranged. The at least two support elements 20, 21 are preferably

arranged in a spaced relationship to each other.

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elements 18 and the burn-through element 17.

The support elements 20, 21 are preferably made of a metallic material, but can also be made of another material, such as a ceramic

mixed material.

In the embodiment of the boiler 1 shown in Fig. 1, the two support elements 20, 21 are arranged on the base element 22 of the filling chamber 4 or are integrally connected thereto. The at least two support elements 20, 21 preferably extend only over a partial area of the width of the filling chamber 4, so that in this embodiment a distance remains between the support elements 20, 21 and the side walls of the filling chamber 4 or the filling chamber lining 12, in which distance charcoal originating from the last heating process and remaining in the filling chamber 3 can be arranged or in which logs 2 can be arranged resting on the base element 22. It is thus possible to arrange side walls of the air duct 23 between the ignition element 18 or the

ignition elements 18 and the burn-through element 17.

The support elements 20, 21 can be strip-shaped, at least in the support area for one or more logs 2, and in particular each be formed in one piece. In this embodiment, the support element 21 closest to the at least one ignition element 18 can be formed with openings through which the ignition air can flow in the air duct 23.

men can.

Considering the depth of the filling chamber 4, more than two supports can be

elements 20, 21 are arranged.

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Figures 4 and 5 show a section of a variant embodiment of the boiler 1. In general, the rear support element 20 can be formed by a support element 24 arranged on the circumference of the burn-through element 17. The support element 24 preferably extends only over a partial area of the circumference, so that in particular a forward (in the direction of the at least one

Ignition element 18) directed area of the burn-through element 17 remains open.

In the embodiment shown in Figs. 4 and 5, the support element 24 is designed as a collar of the burn-through element 17. The collar can be formed in one piece or, as can be seen particularly in Fig. 4, in several parts and can have several collar elements 25, possibly arranged at an angle to one another. The angular arrangement of the collar elements 25 can help prevent the burn-through element 17 from being pulled out with a cleaning device. With the rear collar element 25, which slopes forwards and ascends at an angle, the air coming from the front out of the air duct 23 can be completely

melt or redirected forwards or downwards.

The cantilever element(s) 25 or generally the collar can be formed in one piece with the burn-through element 17 or connected to the burn-through element 17, for example by means of a material fit and/or force fit and/or

form-fitting.

The front support element 21 can be designed as described for Fig. 1. In the embodiment shown in Figs. 4 and 5, two front support elements 21 are arranged and formed by a projection of the filling chamber lining 12 projecting into the ignition section of the hot chamber section 13. In this embodiment, only one such projection can be used.

jump as a support element 21.

The at least one projection can be formed, for example, by a bent piece

the filling chamber lining 12.

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As is known per se, the boiler 1 can have a primary air supply 44 with a primary air slide 45 and a secondary air supply 46 with a secondary air slide 47. The primary air can be supplied, for example, from a so-called air box 48 to one or more, e.g., laterally arranged primary air ducts 49. The air slides can, for example, be designed as rotary slides, as can be seen from Figs. 8 and 9. Unlike in known boilers, the primary air slide 45 and the secondary air slide 47 preferably each have their own drive 50, 51 for

their adjustment.

Furthermore, according to one embodiment variant, the boiler 1, as described above, can have an ignition and preheating air supply, for which the ignition air duct 19 can be provided. A further air damper can be arranged in this ignition and preheating air supply, this air damper being combined with the primary air damper 45, as can be seen in Fig. 9. The primary air damper 45 has, in addition to the openings 52 for the primary air supply, also an opening 53 for the supply of the ignition and preheating air. The preheating air can be supplied, for example, according to arrow 54 in Fig. 8. The hot ignition air can be introduced, for example, according to arrow 55, towards the ember bed. The intake duct for the primary air intake to the first combustion chamber section is preferably at least in the area of the heating chamber outlet.

section 13 in the front area of the hot space section 13.

It is also possible to supply the ignition and heating air not via the primary air slide 45 but via the secondary air slide 47 or with a combination

tion of it.

Furthermore, the boiler 1 can be equipped with a control and/or regulating device (not shown). This control and/or regulating device can comprise, among other things, an electronic memory element. According to one embodiment of the boiler 1, a program can be stored in this memory element, which, depending on the residual oxygen in the exhaust gas and the

Exhaust gas temperature, the exhaust fan speed, i.e. the speed of the induced draught fan

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blower 7, and/or the position of the primary air slide and/or the secondary air slide can be changed. This can achieve a further reduction in CO emissions during the start-up phase. The oxygen content can

e.g. measured or determined with a lambda probe in the flue gas duct.

The boiler 1 can be loaded with logs 2 such that a bottom layer of logs 2 can be arranged at least partially between the ignition element 18 and the burn-through element 17 on the support elements 20, 21, spaced from the floor, i.e., the floor element 22, of the hot chamber section 13, to form the described air channel 23. The air drawn in by the burn-through element 17 can largely be supplied by the at least one ignition element 18 and the additional ignition air. In addition to this loading with logs 2, the air channel 23 can also be formed with the charcoal (as described above) by moving this charcoal into the side areas of the filling chamber 4 during cleaning. These residues can thus still be burned and do not need to be disposed of. The flame created by the igniter propagates evenly towards the burn-through element 17 in the gaps of the logs and is very early

visible at the bottom of combustion chamber 3.

It should be noted that Fig. 4 shows the opening of the burn-through element 17, which creates a flow connection between the filling space

4 and the combustion chamber 3.

It should also be noted that the further loading of the filling chamber 4 with logs 2 after the first logs 2 have been placed on the support elements 20,

21 can be done as conventionally known.

In Figs. 6 and 7 a section of a boiler 1 is shown.

The lower filling chamber apron 15 has an air supply channel 30 with at least one change in the direction of air flow on at least one first side wall 26 to 29. Alternatively or additionally, it can be provided that at least one of the side walls 26 to 29, preferably on two opposite

lying side walls 27, 29, a heat conducting element 31 is arranged.

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The lower filling chamber apron 15 may have four or fewer or more than four side walls 26 to 29. In the embodiment of the boiler 1 shown in the figures, the lower filling chamber apron 15 has four side walls 26 to 29.

As can be seen in particular from Figs. 2 and 3, the side walls 26 to 29 of the lower filling chamber apron 15 can extend continuously over the respective associated dimension of the filling chamber 4. The upper filling chamber apron 16 can be designed in the same way, but can also have several, adjacently arranged

arranged plate-shaped apron elements per side wall.

As can be seen from Fig. 4, according to one embodiment variant, the lower filling chamber apron 15 can have a further air supply channel 30 with at least one further side wall 28, which is in particular opposite the first side wall 26.

at least one change in the direction of air flow.

The at least one air supply channel 30 is formed in particular on a side wall 26, 28 of the lower filling chamber apron 15, which is located between the front

wall and the rear wall of the filling chamber 4 or the boiler 1.

The side wall 26, 28 forming the at least one air supply duct 3 can be made of a correspondingly formed sheet metal element or generally of a metallic material. For example, the side wall 26, 28 can be at least approximately trough-shaped or can have a U-shaped cross-section. By arranging the side wall 26 or 28 on one of the corresponding filling chamber side walls 32 of the filling chamber 4 (shown in Fig. 4), the air supply duct 30 can be at least approximately closed circumferentially, so that the supplied air cannot be trapped between the filling chamber side wall 32 and

the side wall 26 or 28 can escape.

At the inlet to the air supply duct 30, an inlet element 33 can be arranged and optionally connected to the side wall 26 or 30 of the lower filling chamber apron 15. The inlet element 33 forms with the side

wall 28 or 30 has or has an air inlet opening 34 for fresh air.

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The air inlet opening 34 can be completely closed. The air inlet opening 34 is particularly located in the front area of the lower filling chamber

apron 15 is arranged or formed.

At the end of the side wall 26 or 28 opposite the air inlet opening 34, the air supply duct 30 is preferably designed to be closed. This can be achieved by means of a projection of the side wall 27 adjoining the side wall 26 or 28, or with the corresponding filling chamber side wall 32, against which the lower filling chamber apron 15 may rest, or by means of a separate closure.

closing element 35.

To change the flow direction of the supplied air, a flow guide element 36, in particular a strip-shaped one, can be arranged in the air supply duct 30, which is connected in particular to the side wall 26 or 28 of the lower filling chamber apron 15, for example by means of a material fit and/or force fit.

and/or form-fitting.

In the preferred embodiment, the change in the flow direction of the supplied fresh air is a reversal of the flow direction, as indicated by the arrow 37 in Fig. 6. The air entering the air supply duct 30 is thus deflected by at least approximately 180°. For this purpose, the flow guide element 36 can extend to or into the air inlet opening 34. The area of the air inlet opening 34 through which no air is to enter, i.e. the upper area in Fig. 6, can be covered with a cover element 37, so that the air inlet into this area is prevented. The air enters the air supply duct 30 via the open area of the air inlet opening 34, flows in a rearward direction, then changes direction and then flows back on the other side, in particular above the flow guide element 36.

front towards the cover element 37.

Preferably, the two opposite side walls 26, 28

the lower filling chamber apron 15 is designed identically with regard to the fresh air supply.

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This design of the lower fuel chamber apron 15 with the air supply duct(s) 30 supports the start-up phase of the boiler 1. During start-up, the logs 2 (or the fuel in general) begin to burn in specific spots. The flame propagates further and is intended to form a uniform bed of embers in this primary combustion zone. The lateral air supply ducts 30 of the lower fuel chamber apron, which can therefore also be referred to as an air apron, with integrated flow direction change, in particular reversal of the flow direction, promote a uniform ember build-up.

and this leads to lower emissions and safe starting.

For example, if the logs 2 are burning in the front area of the fuel chamber 4 (with fresh air supply), the air is preheated and enters the rear primary air zone already hot. If the fire is burning at the rear, the air that then flows forward is preheated. Once the air is preheated at the entry points, the heat is transferred to the fuel and dries it simultaneously.

early. This means that fires start burning earlier, primarily in these areas.

The flow guide element 36 can be arranged horizontally. However, it is preferably arranged diagonally from front to back, so that the first section of the air supply duct 30 tapers towards the rear.

and the second adjoining section tapers towards the front.

The air supplied laterally for combustion enters the primary combustion area surrounded by the lower filling chamber apron 15 via at least one opening in the first side wall 26 or the further side wall 28. In principle, this can take place via an opening in the lower filling chamber apron 15, which is formed, for example, by a recess in the upper bevel. In the preferred embodiment, however, several spaced-apart openings 38 are formed in the first side wall 26 and the further side wall 28 in their at least approximately vertically extending section(s), through which the air can flow into the ember area of the lower filling chamber apron 15 according to the flow direction 39. Several or

all openings 38 can be of the same design, i.e. the same shape

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and/or the same size. Furthermore, all or several openings 38 can be at the same height or at different heights in the side

wall 26.

Depending on the size of the boiler 1 or the filling chamber 4, for example, between three and twelve openings 38 can be provided. The openings 38 can have a size between 30 mm? and 250 mm?. They can be circular, oval, elliptical, square, hexagonal, or generally

have a polygonal perimeter.

In principle, the openings 38 in the side walls 26, 28 can be arranged or formed at the same distance 40 (see Fig. 4) from one another. However, this distance 40 preferably varies, so that according to one embodiment, the openings 38 in the first side wall 26 for supplying the air from the first air supply duct 30 to the hot space section 13 and the openings 38 in the further side wall 28 for supplying the air from the further air supply duct 30 to the hot space section 13 are arranged offset from one another in the direction of air flow along the side walls 26, 28, as can be seen from Fig. 4. This can prevent the air flowing through the openings 38 in the first side wall 26 from directly impinging on the air flowing through the openings 38 in the further side wall 28, which would thereby partially be forced upwards. According to a variant of this embodiment, it can be provided that not all openings 38 in the side wall 26 are arranged offset to the openings 38 in the further side wall 28, as

This can be seen from the figures.

It can further be provided that the distances 40 between the openings 38 of a side wall 26 or 28 are the same size, but nevertheless the

described offset is formed.

According to a further embodiment of the boiler 1, it can be provided that on an inner side 41 or inner surface of the first and/or the

further side wall 26, 28 the first and/or further openings 38 at least

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at least partially overlapping projections 42 are arranged, as shown, for example, in Fig. 6. These projections 42 serve to deflect the air flowing in through the (further) openings 38 downwards towards the ember bed. As a side effect of this deflection, the vertical extent of the heating chamber section 13 can also be better defined. The projections 42 can be tongue-shaped or roof-shaped, optionally with side parts. For example, the projections 42 can be formed by bending the sheet metal sections that arise during the formation of the openings 38 in the side wall 26 or 28. However, they can also be provided as individual elements or with a strip to which the projections 42 are pre-

are arranged on the side wall 26 or 28.

In general, it can be provided or it can be an independent invention independent of the above-described downdraft boiler that the filling chamber lining 12 has openings 38 in at least one of the side walls of the filling chamber lining or of the lining element described in more detail below for the supply of air to the ember bed, wherein on an inner side, i.e. the surface of the side wall facing the fuel, projections 42 are arranged which at least partially cover the openings.

are.

The heat-conducting element 31 can, for example, be made of a steel sheet, in particular a stainless steel sheet. Preferably, both the front and rear side walls 29, 27 each have a heat-conducting element 31. Since both heat-conducting elements 31 are preferably of the same design,

The following specifications apply to both heat conducting elements 31.

The heat-conducting element 31 preferably extends over a length of the side wall 27 that is between 50% and 100%, for example between 60% and 90%, of the total length of the side wall 27 in this direction. Furthermore, it can have a height that is between 20% and 100%, for example between 30% and 80%, of the total height of the side wall 27. In particular,

it has a surface area (viewed from the front) that is between

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30% and 90%, for example between 40% and 80% of the area

the side surface is 27 (viewed in the same direction).

In the simplest case, the heat-conducting element 31 is arranged on the side wall 27 and connected thereto. However, according to one embodiment variant, it can preferably be provided that the heat-conducting element 31 is arranged on the side wall 27 of the lower filling chamber apron 25, thermally separated from the latter. The thermal separation can, for example, be designed such that the heat-conducting element 31 is only positively connected to the side wall 27 or is only suspended therein, as can be seen, for example, in Fig. 7. For this purpose, the side wall 27 can have tabs 43 that are arranged to cover the heat-conducting element 31, so that the heat-conducting element 31 is received in a type of pocket. Alternatively, the thermal separation can be achieved not only by point support but also by thermal insulation materials,

such as ceramics.

According to a further embodiment, it can be provided that the side wall 27, on which the heat conducting element 31 is arranged, is arranged adjacent to a water jacket of the boiler 1. In particular, with this embodiment, the advantage of the heat conducting element 31 comes into play, since on the one hand the or the remainder of the side wall 27 is cooled by the water jacket, but due to the arrangement of the heat conducting element 31 spaced from the water jacket and thermally separated from the side wall 27, a more uniform

Distribution of heat across the width of the filling space 4 can be achieved.

It should be noted at this point that the heat-conducting element 31 may be part of the side wall 27. The term "remainder of the side wall 27" should be understood from this perspective. In any case, the heat-conducting element 31 does not lie directly against the water jacket and is preferably connected via the thermal separation to the lower filling chamber skirt 15 and thus also to the remainder of the side wall.

27 also arranged thermally separated from the water jacket.

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As already explained above, the lower filling chamber apron 15 can be used as a lining element for a boiler 1 for logs in general, such as pellets or wood chips or other solid biomaterial, such as straw, etc. The lining element comprises a frame with several side walls 26 to 29, wherein at least a first side wall 26, 28 at least partially forms an air supply duct 30 with at least one change in the direction of air flow and/or wherein a heat conducting element 31 is arranged on at least one of the side walls 27, 29, preferably on two opposite side walls 27, 29 (each). In particular, this lining element is designed correspondingly to the lower filling chamber apron 15, as described in the individual embodiments, and therefore these embodiments can also be seen as embodiments of the lining element. The boiler 1 itself can, in these embodiments,

variants may be designed differently than above.

The lining element is used in boilers 1 to even out the embers

bed, i.e. for a more even formation of the ember bed.

The exemplary embodiments show possible design variants of the boiler 1, whereby combinations of the individual design variants are also possible. In particular, the design of the filling chamber lining with openings, with projections arranged on an inner side that at least partially cover the openings, can constitute an independent invention.

the.

For the sake of order, it should finally be pointed out that in order to better understand the structure of the boiler 1, this does not necessarily have to be

is represented in a rod-like manner.

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20

List of reference symbols

Boiler Log Combustion chamber Filling chamber Filling chamber door Combustion chamber door Induced draught fan Heat exchanger Turbulator element Housing Housing door Filling chamber lining Hot chamber section Cold chamber section Filling chamber apron Filling chamber apron Burn-through element Ignition element Ignition air duct Support element Support element Floor element Air duct Support element Collar element Side wall Side wall Side wall Side wall

Air supply duct

31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Heat conducting element Filling chamber side wall Inlet element Air inlet opening Closure element Flow guide element Cover element Openings Flow direction Distance

Inside cantilever

Tab primary air supply primary air slide secondary air supply secondary air slide air box primary air duct drive

Drive

Breakthrough Breakthrough

Arrow

Arrow

A2023/88173-AT

Claims (9)

Patent claims 1. Heating boiler (1) for logs, such as logs (2), comprising a combustion chamber (3), above which, in particular immediately adjacent, a filling chamber (4) for the logs is arranged, wherein the filling chamber (4) has a hot chamber section (13) and a burn-through element (17) is arranged between the hot chamber section (13) and the combustion chamber (3), furthermore at least one ignition element (18) for igniting the logs is arranged or can be arranged, and with a filling chamber lining (12), characterized in that the filling chamber lining (12) has openings (38) in at least one of the side walls (26 to 29), wherein projections (42) at least partially covering the openings (38) are arranged on an inner side of the side wall (26 to 29), and/or that the filling chamber lining (12) has a lower and an adjoining upper filling chamber apron (15, 16), wherein the lower Filling chamber apron (16) has at least on a first side wall (26) an air supply channel (30) with at least one change in the flow direction of the air and/or that on at least one of the side walls (27, 29), preferably on two opposite side walls (27, 29), a heat conducting element (31) is arranged. 2. Boiler (1) according to claim 1, characterized in that the lower filling chamber apron (15) has, on at least one further side wall (28), which is in particular opposite the first side wall (26), a further air supply duct (30) with at least one change in the flow direction of the air. points. 3. Boiler (1) according to claim 2, characterized in that the openings (38) are arranged in the lower filling chamber apron (15), wherein in the first side wall (26) first openings (38) for the supply of the air from the first air supply duct (30) to the hot chamber section (13) and in the further side wall (28) further openings (38) for the supply of the air from the further air supply channel (30) to the hot space section (13). A2023/88173-AT 4. Boiler (1) according to claim 3, characterized in that the first openings (38) are offset in the flow direction (39) of the air to the further openings (38) are arranged. 5. Boiler (1) according to one of claims 1 to 4, characterized in that the heat conducting element (31) is arranged on the side wall (27, 29) of the filling space apron (15) is arranged thermally separated from this. 6. Boiler (1) according to one of claims 1 to 5, characterized in that the heat conducting element (31) on the side wall (27, 29) is only is coherently connected to it or is only suspended. 7. Boiler (1) according to one of claims 1 to 6, characterized in that the side wall (27, 29) to which the heat conducting element (31) is attached is arranged adjacent to a water jacket of the boiler (1). 8. Lining element for a boiler for logs, comprising a frame with several side walls (26 to 29), characterized in that in at least one of the side walls (26, 28) openings (38) are arranged, wherein on an inner side the openings (38) at least partially overlapping projections (42) are arranged, and/or that at least one first side wall (26) at least partially forms an air supply channel (30) with at least one change in the flow direction of the air and/or that on at least one of the side walls (27, 29), preferably on two opposite lying side walls (27, 29), a heat conducting element (31) is arranged. 9. Lining element according to claim 8, characterized in that the frame corresponding to the lower filling space apron (15) according to one of the Claims 2 to 7. A2023/88173-AT