AT15854U1 - Mobile radiant heater - Google Patents

Abstract

The invention relates to a mobile radiant heater (2) with a combustion unit (2 6) for burning solid fuel, a solid fuel storage (16), a transparent emission unit (6) for radiating heat of combustion into the environment and a flue, which vertically up through the Abstrahleinheit (6) is directed. A particularly clean operation is possible if the radiant heater (2) has an ash collecting container (10), which is arranged in the flue gas stream after the emission unit (6).

Description

The invention relates to a radiant heater, in particular a mobile radiant heater, with a combustion unit for burning solid fuel, a solid fuel storage, a particular transparent emission unit for radiating combustion heat into the environment and a flue, which is directed through the emission unit.

For heating semi-open tents or terraces in gastronomy and event area heaters are now known that heat with wood pellets. The wood pellets are burned on a burning plate of the radiant heater, and the flames produced by the combustion strike upwards into the transparent emission unit, so that the flames are visible from the outside. The emission unit is a glass tube that heats up and emits heat to the outside through the flames blazing in its interior. The light generated by the flames and penetrating the glass leads to additional energy dissipation. The heating effect is based here mainly on radiant heat of the heated glass tube, which impinges on the persons or objects to be heated.

Compared with hitherto customary and gas-fired radiant heaters with pellets fired radiant heaters, the difference that ash and smoke arise.

It is an object of the present invention to provide a radiant heater with a burning unit for burning solid fuel, which can be operated very clean.

This object is achieved by a radiant heater of the type mentioned, which has an ash collection container, which is arranged in the flue gas stream after the emission unit.

The invention is based on the consideration that forms ash in the combustion of solid fuel, such as biomass pellets. In a kiln, such ashes usually accumulate in or under the combustion chamber in an ash box where it falls after being burned. The ash can then be removed later from the ash box.

In a radiant heater, the most effective heating effect is achieved when the flames extend from the combustion chamber as far as possible high in the emission unit, so this is strongly heated over the largest possible length. If, in addition, the flames radiating in the visible spectral range reach as high as possible into the emission unit, then, in addition to an energy gain of the emission, a pleasant visual effect of the firelight can also be effected. The emission unit heats up to between 600 ° C and 900 ° C, so it reaches the orange glowing temperature range itself.

Since there is also the desire for a low smoke, the combustion of the solid fuel should be as complete as possible. For this purpose, a strong combustion air flow is required, which is supplied to the combustion in the combustion chamber. The strong air flow and the flames reaching far as far as possible cause the ashes formed in the combustion chamber to be largely torn up with the flames and the air flow. It flies through the emission unit from bottom to top and leaves the radiant heater through the chimney. As a result, the fly ash deposits in the environment. Especially when used in restaurants with white tablecloths and good clothes such a fly ash storage is to be kept as low as possible.

By the ash collecting container according to the invention, which is arranged in the flue gas stream after the emission unit, the fly ash that has passed through the emission unit, can be largely absorbed and separated from the flue gas. An exit of the fly ash from the radiant heater can thereby be at least largely prevented.

The emission unit is expediently oriented vertically upwards so that a flue gas duct is directed vertically upwards through the emission unit. A simple one

Arrangement of the ash collection container in the flue gas stream behind the emission unit can be achieved if the ash collection container is arranged on the emission unit. The emission unit can open at the top into the ash collecting container, in which the fly ash is separated from the flue gas. The ash collecting container can be arranged on the emission unit, this also being understood as meaning a partial arrangement directly above the ash collection container.

The ash collecting container can be carried by the emission unit. Additionally or alternatively, it is possible that the ash collection container is at least partially supported by a protection unit which is arranged around the emission unit. Conveniently, the ash collecting container is supported radially inwardly by the emission unit and radially outwardly by the protection unit.

In order to keep low noise during operation of the radiant heater, it is advantageous if the ash collection container is free of electric motors and fans. For the flue gas flow through the ash collecting container and the deposition of ash so far only the already existing upstream of the ash collection tank train of flue gas is used. In addition, this can avoid the very complex laying of a power supply to the ash collection. The ash collecting container may be the only unit of the radiant heater present downstream of the emitting unit.

The solid fuel may be biomass. Biomass pellets, in particular wood pellets, are particularly easy to convey. In order to achieve a continuous and energy-efficient combustion process, it is advantageous if the radiant heater has a conveying device for conveying solid fuel to the firing unit. In this way, for example, a decreasing fuel level and thus a changing combustion can be avoided. The delivery unit can reach from the solid fuel storage to the combustion unit. Particularly suitable is a screw conveyor with a screw conveyor in a conveyor tube, in which the solid fuel is either directly conveyed to the firing unit by rotation of the screw conveyor or can be conveyed to such a location, from which the fuel can fall into the firing unit.

The radiant heater may be a stationary radiant heater. Conveniently, however, he is a mobile radiant heater, which is manually portable as a whole, so that it can be offset by a simple rolling, carrying or moving without its function is impaired. Such displacement is expediently also possible during normal operation of the radiant heater.

In an advantageous embodiment of the invention, the ash collecting container, the emission unit and the firing unit are arranged in a vertical line to each other. The hot flue gases can penetrate substantially unrestrained from the firing unit through the emission unit in the ash collection, so that a good drawing of the flames is achieved in the emission unit. In addition, this can be effected by the fact that the fly ash substantially completely reaches the ash collecting container and thus deposited in a controlled manner.

For separating the fly ash of the ash collecting container expediently comprises a storage area for fly ash. This can be arranged around a flue gas inlet and is suitably level. At or in the immediate vicinity of the storage area, a retaining element for retaining the fly ash may be present. In this case, the retaining element is expediently designed such that it forces the flue gas stream leading into the flight path into a curved path, on the outside of which the depositing surface is arranged. The storage surface may in this case be an at least substantially horizontal surface, which is limited in particular by the retaining element on at least one side. In this way, an inner edge can be formed, at which the fly ash preferably settles and is largely protected from a gas flow. It is also possible that the support surface is bounded by an outer wall of the ash collection container, which can thereby form a retaining element.

In order to separate the fly ash from the flue gas, it is advantageous if the ash collecting is geometrically designed so that the flue gas flow is deflected within the ash collection from an upward flow in an at least substantially horizontal direction, advantageously in several directions, the strive for at least 90 ° apart. It can thereby be achieved a large increase in the flow cross-section and thus a strong slowdown of the flue gas velocity, so that the entrained fly ash there largely deposits.

Advantageously, a lower flue gas inlet into the ash collecting container, which has over the flue gas inlet, expediently directly above the flue gas inlet, for example, at least substantially horizontal deflecting plate. This can be done in a simple manner, a deflection from the vertical in an at least substantially horizontal direction. In order to ensure a shield of rain, it is advantageous if a roof over the baffle is present, which prevents the ingress of rain that falls from above or is blown by the wind at an angle of not more than 30 ° to the vertical. The baffle can thus form an inner intermediate roof that lies completely below the container roof.

A separation of fly ash is a slow flow velocity of the flue gas conducive. To achieve a slow flow velocity, it is expedient for the deflecting plate to be arranged such that it is laterally surrounded at least essentially by a flow channel for the flue gas. Not so good is a flue gas duct in both sides around the baffle around, in particular so that it is flowed around in at least three of four directions in the sky. The flue gas can rise on both sides, or laterally in several or all directions around the baffle, creating a very large separation area for fly ash. The baffle can be so far flowed around radially outside of the flue gas.

A flow guide, which is particularly favorable in terms of ash deposition, can be achieved if the roof, which is above the baffle, in the region of a flue gas guide to the baffle has a slope of at most 30 ° to the scale. The roof can guide the flue gas flow radially inward without the need for an additional unit.

With the same advantage, the roof of a portion of a flue gas duct to the baffle is flat lower than the baffle radially outwardly and pulled down. The flue gas can be guided around the baffle through one or more flat roof surfaces.

A preferred application of a mobile radiant heater will be in tents, the tent roof can catch fire at high temperatures. It is therefore useful if hot flue gas is distributed over a large area before rising upwards outside of the radiant heater to counteract a bundled hot air flow upwards. For this purpose, it is advantageous if the ash collecting container has a lateral flue gas outlet, so that the flue gas leaving the ash collecting container flows out laterally out of the ash collecting container. Conveniently, only side outlets are available. A lateral outlet, in addition to being oriented to the side, may also have an alignment component downwardly, in particular, completely aligned downwardly. This can contribute to a further turbulence of the hot flue gas after the exit from the ash collecting container or the radiant heater.

In order to obtain a good excretion of fly ash from the flue gas, it is also beneficial if the ash collecting container has a deflection unit for deflecting flue gas in the ash collecting container from a radially outwardly directed flow direction upwards. By a side-up flow arc, fly ash may be deposited outward toward the side and down by exiting the curved stream. Further entrainment of the fly ash by the flue gas flow is counteracted.

Furthermore, it is advantageous if the ash collecting container has a deflection unit for deflecting flue gas within the ash collection container from a radially outwardly directed flow direction radially inward. As a result, an advantageous ash deposition can be achieved, for example, at the slowest flow point of the flue gas.

Furthermore, it is advantageous if a deflection unit for deflecting flue gas is present in an S-shaped path. This web is expediently completely within the ash collection container. For a discharge of fly ash is particularly conducive to the S-shaped track in a standing S-shape. A vertically more compact construction of the ash collecting container can be achieved if the S-shaped sheet has a lying S-shape.

To achieve a low flow velocity of the flue gas, it is advantageous if a flow path of the flue gas is in front of or in the bottom of the S-shaped web, in which this is widened radially in all directions.

Depending on the location of the radiant heater, there may be occurrences that the hot flue gas must be continued even after leaving the ash collecting container to protect surrounding objects from excessive heating or fly ash. This can be achieved if the flue gas guide is brought together again after widening. The flue gas can leave the ash collecting container through a preferably upwardly directed fireplace. It is advantageous insofar as the ash collecting container has a flue gas channel, which is divided around a deflecting plate and reunited after a lower inlet into the ash collecting container.

Conveniently, the upper part of the ash collecting container is formed by a fireplace. The chimney can be made in substantially any length, so that the flue gas is led upwards out of a tent, for example in the chimney, so that the flue gas escapes from the chimney only outside the tent. Even in buildings, the fireplace can be guided so that the flue gas escapes from the fireplace only outside the building, for example, from a window with angled fireplace.

In order to achieve a good distribution of the hot flue gas at the exit from the chimney, it is advantageous if the chimney has a roof through which the flue gas duct is deflected downwards.

A versatile use of the radiant heater can be facilitated if the chimney has a lower nozzle to which a chimney extension is attached. The chimney extension, for example, be easily plugged onto the nozzle, so that the fireplace is thereby extended quickly and easily. Advantageously, the chimney extension has a length of at least 40 cm, in particular at least 1.5 m. If the nozzle has a length of at least 5 cm, a simple attachment of the chimney extension to the nozzle can be achieved.

A simple emptying of the ash collection container can be achieved if it is removable from the emission unit without tools.

The invention is also directed to a method of heating by means of radiant heat, is burned in the solid fuel in a combustion unit of a radiant heater and combustion heat is discharged with a radiating unit in the vicinity of the radiant heater.

In order to achieve a clean operation of the radiant heater, it is proposed that according to the invention hot flue gas from the firing unit through the emission unit and from there through an ash collection container, in which a part of the fly ash is eliminated from the flue gas. Conveniently, at least half of the flue gas present in the flue gas is excreted within the ash collection container, in particular more than 90%.

The present description of advantageous embodiments of the invention contains numerous features, which are summarized in several dependent claims summarized in several. However, these features may conveniently be considered individually and summarized into meaningful further combinations, particularly when reclaiming claims so that a single feature of a dependent claim may be combined with a single, several or all features of another dependent claim. In addition, these features can be combined individually and in any suitable combination both with the method according to the invention and with the device according to the invention according to the independent claims. Thus, process features are also objectively formulated as a property of the corresponding device unit and functional device features also as corresponding process features.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of the embodiments, which will be explained in connection with the drawings. The embodiments serve to illustrate the invention and do not limit the invention to the combination of features specified therein, not even with respect to functional features. In addition, suitable features of each embodiment may also be explicitly considered isolated, removed from one embodiment, incorporated into another embodiment to complement it, and / or combined with any of the claims.

[0036] FIG. 1 shows a radiant heater with a supporting structure, within which a

FIG. 2 shows the radiant heater from FIG. 1 in a cross section from above, FIG. 3 shows the radiant heater from FIG. 1 in a longitudinal section from FIG 4 shows the ash collecting container in a longitudinal section from the side, FIG. 5 shows the ash collecting container from FIG. 4 in a cross section from above, FIG. 6 and an alternative ash collecting container in a longitudinal section from FIG

7 shows another ash collecting container in a longitudinal section from the side, and FIG. 8 shows an ash collecting container with an upper central chimney in a longitudinal section from the side. [0043] FIG.

1 shows a radiant heater 2 with a supporting structure 4 and an emission unit 6 arranged thereon. The emission unit 6 is surrounded by a protection unit 8 in order to counteract combustion by touching the emission unit 6. On the emission unit 6, an ash collection container 10 is arranged, which has outlet openings 12 for the exit of the flue gases into the environment.

In the figures, several different embodiments of ash collection container 10 are shown. In this case, substantially identical components are numbered with the same reference numerals. For ease of understanding, moreover, like components in different embodiments are designated by the same reference numerals and other reference numerals, being identical to each other or with slight differences, e.g. in dimension, position and / or function, can be to each other. If the reference number alone is mentioned without a reference letter, then the corresponding components of all embodiments are addressed.

The radiant heater 2 is a mobile radiant heater with a height of between 2.0 m and 2.5 m, which includes below the supporting structure 4 or as a part thereof wheels 14 for easy movement, for example on a terrace or a meadow.

In Figure 1, the protection unit 8 is shown as a transparent unit through which the emission unit 6 is visible. In general, the protection unit 8 can be a grid, for example a wire mesh, a perforated plate with a sufficient number or sufficiently large openings or another metallic protective unit as possible, through which the radiation energy radiated radially outward by the emitting unit 6 can easily be transmitted. Here, the protection unit 8 should heat as little as possible in order to represent a source of danger when touched.

FIG 2 shows the mobile radiant heater 2 in a cross section from above, and FIG 3 shows it in a longitudinal section from the side. The position of the respective other cross section is indicated in both figures by the dotted line. It can be seen in both figures, the supporting structure 4 and arranged in their solid fuel storage 16. To this easier to fill with solid fuel, especially biomass pellets, a shown in FIG 3 rear wall 18 is removable, so that the solid fuel storage 16 is easily accessible, such as can be seen from FIG.

In the solid fuel storage 16 projects a conveyor 20 with a screw conveyor 22 from above. Towards the bottom, a tube around the screw conveyor 22 is open, so that the pellets located in the solid fuel reservoir 16 can press from below into the screw conveyor 22. By a rotation of the screw conveyor 22 in the pipe fixed to the housing, the pellets are conveyed upwards until they reach an opening 24, through which they fall obliquely downwards into a firing unit 26. They fall on a burner plate 28 in a combustion chamber 30 where they burn. The hot flue gases 32 formed from the combustion flow through an upper opening 34 of the firing unit 26 into the emission unit 6, as shown by the two dashed arrows in FIG. The flue gases flow through the ash collecting container 10a and leave it through the outlet openings 12 into the environment.

In the radiant heater 2, the firing unit 26 is particularly easy to remove from a radially surrounding the firing unit 26 housing 38. In FIG. 3, the firing unit 26 is shown in duplicate. On the right, it is mounted inside the housing 38 in the radiant heater 2. On the left, it is removed and turned upside down, so that its collected ash can be poured into an ash container 40, for example a metallic bucket. For this purpose, the firing unit 26 includes a handle 42, where it can be easily removed from the housing 38. The ash falls through the upper opening 34 out into the ash container 40. The ash can also fall out through a filler neck 44. Should the ashes have collected in a gap 46 between a burner housing 48 and the inner housing of a burner 50 because it has come in operation through primary air openings 52 or secondary air openings 54, the ash may exit the intermediate space 46 through lower openings 56.

The firing unit 26 is attached to a burner suspension 58, from which the firing unit 26 can be easily removed in the direction shown by an arrow 60 in FIG. The burner suspension 58 for this purpose comprises two bolts 62, on each of which a sleeve 64 is pushed.

As can be seen from FIG. 3, the emission unit 6 has a double shell. An outer wall is formed by a glass tube 66. The glass tube 66 is transparent and expediently made of a ceramic glass or glass ceramic or other transparent and temperature-stable solid to obtain stability even at high temperatures and also to counteract a break by temperature stresses.

In the glass tube 66, a flare tube 68 is arranged, which is a metallic tube, for example, a perforated plate having a plurality of holes. In order to prevent ash from escaping through the flame tube 68 into a gap 70 between the glass tube 66 and the flare tube 68, the openings in the flare tube 68 may be blocked with a wire mesh. In general, the transparency of the emission unit 6 can be provided by the glass tube 66 and / or apertures in the flame tube 68, wherein the emission unit 6 can comprise the glass tube 66 and / or the flame tube 68.

Depending on the nature of the flame bundle tube can be dispensed with the glass tube to the flame tube, so that the flame tube is the outer tube, in particular the only flue gas pipe leading the emission unit. This is particularly possible in an embodiment of the flame tube of a wire mesh, since the leakage of flue gas from the wire mesh can be kept low here.

For operation of the radiant heater 2, the solid fuel storage 16 with solid fuel, such as wood pellets, filled, the fuel is conveyed by the conveyor 20 in the firing unit 26 until a desired level is reached. Alternatively, the firing unit 26 may be partially manually filled with fuel. The fuel is then ignited with a fireplace lighter or an automatic ignition.

For supplying combustion air, a fan 74 is controlled by a control unit 72, which blows air into an overpressure chamber 78 via an air feed 76. The overpressure chamber 78 is arranged directly on the firing unit 26 and has two openings which pass directly into the openings 56 of the firing unit 26, so that combustion air is blown into the firing unit 26 or its interspace 46. The intermediate space 46 extends radially around the burner 50, so that there is an overpressure in this intermediate space 46 relative to the surroundings. From the intermediate space 46, the combustion air pushes through the primary air openings 52 below and the secondary air openings 54 further up in the inner housing of the burner 50 in the interior or combustion chamber 30 and there fights the combustion.

In order to achieve a good radiation effect of the emission unit 6, the combustion is controlled by the control of the combustion air and the fuel supply into the combustion chamber 30 so that their flames reach far up through the emission unit 6. As a result, such a train is caused by the combustion chamber 30 that the ash resulting from the combustion is largely torn as fly ash with upwards and through the emission unit 6. It takes the path drawn by the two dashed arrows through the emitting unit 6 and into the ash collecting container 10a. In general, in the ash collecting container 10, the hot flue gas is deflected by a deflection unit 80 into a curved path such that the fly ash is deposited downwards. The thus purified flue gas exits through the outlet openings 12 laterally and obliquely downwardly aligned from the ash collecting chamber 10 into the environment.

FIG. 4 shows the ash collecting chamber 10a in a longitudinal section from the side. The flame bundle tube 68, which projects into the ash collecting container 10a, and the glass tube 66, which adjoins the ash collecting container 10a from below, can be seen. Via a connecting piece 82, which is slipped over the glass tube 66, the ash collecting 10 a is attached to the emission unit 6 so that it rests centered in the protection unit 8. The ash collecting container 10a is carried by the protection unit 8, which is supported on the supporting structure 4 of the radiant heater 2 downwards.

The inflowing from below into the ash collecting 10a flue gases 32 meet after entering the ash collection container 10a on a baffle 84, which is arranged, for example, horizontally above the flue gas inlet 86. The baffle 84 is located under a roof 88 of the ash collection container 10a, through which it is protected against entry of rain. The roof 88 can be detached from the remainder of the ash collecting container 10a without tools and, for example, lies only from above, so that it can be easily removed upwards. As a result, the interior of the ash collecting container 10a can be easily cleaned. Also, the entire ash collection container 10a is expediently removable without tools upwards from the emission unit 6. It can be easily removed and knocked out, so that the ash falls out through the outlet openings 12 from the ash collecting container 10a.

By the deflection of the flue gases 32 from the axial direction in the emission unit 6 in the radial direction, which is shown in FIG 6 by a plurality of arrows, the flow cross-section, the flue gas 32 within the ash collection container 10 is available in considerable Scope.

5 shows an ash collecting container 10a in a cross section from above. The section line is shown in FIG. The flue gas 32 flowing through the flue gas inlet 86 is substantially uniformly distributed radially throughout the ash collector 10a, reducing the flue gas velocity substantially inversely proportional to the distance from the flue gas inlet 86. As a result, the ability to entrain fly ash 94 decreases.

As can be seen from FIG 4, the inner space 90, which is the flue gas 32 in the ash collecting container 10a available, extends radially outwardly of the baffle 84 upwards out. The axial height of the ash collecting container 10a or of its inner space 90 increases, whereby the flue gas velocity is further reduced. Radially outward from the point of the flow cross-section, which increases again, a deflecting unit 92 is arranged, by means of which the flue gas 32 is deflected upward from a radially outwardly directed flow direction. By this kinking is favored that fly ash 94 is separated from the slowly flowing flue gas 32 and down on a shelf surface 96, which is designed as the bottom of the ash collection container 10a, settles. The fly ash 94 fills a space at an edge between the deflecting unit 92 and the storage surface 96, as indicated in FIG.

By the sudden release of the interior 90 upwards also a vortex 98 is favored in the flue gas flow through which the excretion of the fly ash 94 to the outside of the vortex 98 is further favored. The deflection unit 92 serves insofar as a retaining element for retaining the separated fly ash 94 in the ash collecting container 10a.

FIG. 6 shows another example of an ash collecting container 10b. The following description is essentially limited to the differences from the exemplary embodiment in the preceding figures, to which reference is made with regard to features and functions that remain the same. In order not to have to carry out several times already described, all the features of a preceding embodiment are generally taken over in the following embodiment, without being described again, unless features are described as differences from the preceding embodiments.

It can be seen that the axial structure of the ash collecting 10b is slightly larger, the axial height is therefore slightly larger. The baffle 84 thus releases a slightly larger interior 90 above the flue gas inlet 86, whereby the flow velocity of the flue gas 32 is lowered again. Due to the increase in space also an acceleration of the flue gas 32 above the deflection unit 92 is prevented. It can be seen from FIG. 4 that the flow cross-section in the region of the deflection unit 92 decreases, as a result of which the flue gas 32 is accelerated. This is not the case in the example of FIG. 6. The flue gas 32 can flow evenly and without acceleration further radially outward and leave the ash collecting container 10 b through the outlet openings 12 of the flue gas outlet 100. The S-shaped path 102 of the flue gas 32 is hardly changed in this case, so that the filter force of this web 100 is not disturbed by the slight change in shape. Optionally, the baffle 84 may terminate below the height of 92 as shown in FIG. 4 to produce a distinct S-shape for good ash deposition.

7 shows another example of an ash collecting container 10c, in which the flue gas 32 flows in an S-shaped path 104, in which the S-shape is upright. The baffle 84 is flowed around radially from all sides, in such a way that the flue gas is directed back to above the baffle 84 back to radially inward. This is done by a further deflection unit 106, which projects radially inwards and forces the flue gas 32 inward. Subsequently, the flue gas flows radially outward through the flue gas outlet 100 into the environment.

The size and position of the baffle 84 is selected so that the flow cross-section is significantly widened after reaching its radially outer edge. This is due not only to the radial flow direction of the flue gas, but also because the distance 108 of the deflecting plate 84 is smaller down than the distance 110 radially outward initially in the flow cross-section limiting unit, in this case the outer wall of the ash collecting 10c. As a result, the flow velocity drops abruptly, causing the fly ash 94 at this point particularly well from the flue gas stream 32 fails.

In the embodiment of FIG 8, a sloping roof 88 of an ash collection container 10d surrounds a baffle 84 on all four sides. The baffle 84 is held with holders 112 directly on the roof 88, wherein expediently several holders 112 engage on each of the four sides of the roof 88 on the baffle 84.

The flue gas 32 divides radially after flowing through the inlet 86 in all directions, whereby the flow cross section is greatly increased and the flow velocity is reduced accordingly. As a result, the ash 94 drops out and collects on the bottom of the ash collecting 10d, which serves as a storage surface 96. The flue gas guide, shown in FIG 8 by the path of the flue gas 32, divides and extends on all four sides around the baffle 84 around, and then reunite above the baffle 84 to a stream. The flue gas duct exits the ash collecting container 10d through a central chimney 114, which is provided with a chimney 116. This directs the flue gas duct before emerging from the ash collecting container 10d radially outward and downward, as can be seen in Figure 8, whereby the flue gas 32 is well distributed.

The roof 88 has a roof slope of 70 ° to the vertical and 20 ° to the horizontal. The roof 88 has flat roof surfaces, for example 4 roof areas in a pyramidal arrangement. Also possible would be a round design, for example in a conical shape. The flat roof surfaces are partially above the baffle 84 and are pulled from there down to an axial height below the baffle 84. By the pulled-down roof slope under the baffle 84, the flue gas 32 - at least for the most part - already directed radially inward before it reaches the axial height of the baffle 84. As a result, the ash 94 is very largely eliminated from the flue gas 32 and collects on the bottom and on lateral outer walls of the ash collecting container 10d, which are likewise inclined somewhat obliquely radially inwards.

The chimney 114 has a lower neck 118, on which a chimney extension 120 can be placed, as shown in dashed lines in FIG. For this purpose, the chimney 116 is removed and the chimney extension 120 is attached to the socket 118, for example. To achieve a secure guidance, the nozzle 118 has a length of 8 cm. The chimney extension 120 has a length of 1.5 m, which is not shown to scale in FIG. In this way, the flue gas 32 can be discharged from an upper opening of a tent or room, without it flows into the interior of the tent or room. By screwing or a clamping sleeve, the chimney extension 120 can be firmly connected to the ash collection container 10d.

REFERENCE LIST 2 radiant heater 4 supporting structure 6 emitting unit 8 protection unit 10 ash collecting tank 12 outlet opening 14 wheel 16 solid fuel reservoir 18 rear wall 20 conveyor 22 conveyor screw 24 opening 26 burning unit 28 burning plate 30 combustion chamber 32 flue gas 34 opening 38 housing 40 ash container 42 handle 44 filling nozzle 46 space 48 burner housing 50 burner 52 Primary air opening 54 Secondary air opening 56 Opening 58 Burner suspension 60 Arrow 62 Bolt 64 Socket 66 Wall 68 Flame bundle tube 70 Interspace 72 Control unit 74 Blower 76 Air supply 78 Overpressure chamber 80 Diverting unit 82 Connecting piece 84 Deflecting plate 86 Flue gas inlet 88 Roof 90 Interior 92 Deflection unit 94 Fly ash 96 Storage surface 98 Vortex 100 Flue gas outlet 102 Path 104 Path 106 Deflection unit 108 Distance 110 Distance 112 Holder 114 Fireplace 116 Fireplace roof 118 Chimney flue 120 Fireplace extension

Claims (20)

claims A mobile radiant heater (2) having a burning unit (26) for burning solid fuel, a solid fuel reservoir (16), a transparent emitting unit (6) for radiating heat of combustion into the environment, and a smoke flue vertically upwardly passing through the emitting unit (6 ), characterized by an ash collecting container (10), which is arranged in the flue gas stream after the emission unit (6). 2. radiant heater (2) according to claim 1, characterized in that the ash collecting container (10), the emission unit (6) and the firing unit (26) are arranged in a vertical line to each other. 3. Radiant heater (2) according to claim 1 or 2, characterized in that the ash collecting container (10) has a storage surface (96) for fly ash (94) and a retaining element (92) for retaining the fly ash (94). 4. Radiant heater (2) according to one of the preceding claims, characterized in that the ash collecting container (10) has a lower flue gas inlet (86), a horizontal deflecting plate (84) immediately above the flue gas inlet (86) and a roof (88) above the deflecting plate (84). 5. radiant heater (2) according to claim 4, characterized in that the deflecting plate (84) is arranged so that it is surrounded laterally at least substantially all around by a flow channel for the flue gas (32). 6. Radiant heater (2) according to claim 4 or 5, characterized in that the roof (88) in the region of a flue gas guide to the baffle (84) has an inclination of at most 30 ° to the scale. 7. radiant heater (2) according to one of claims 3 to 5, characterized in that the roof (88) of a portion of a flue gas guide to the baffle (84) is flat lower than the baffle (84) drawn radially outward and downward. 8. radiant heater (2) according to any one of the preceding claims, characterized in that the ash collecting container (10) has a side flue gas outlet (100), so that the ash collecting container (10) leaving the flue gas (32) laterally from the ash collecting container (10). 9. radiant heater (2) according to any one of the preceding claims, characterized in that the ash collecting container (10) has a deflection unit (80, 92) for deflecting the ash collecting container (10) flowing flue gas (32) from a radially outwardly directed flow direction has above. 10. radiant heater (2) according to any one of the preceding claims, characterized in that the ash collecting container (10c) has a deflection unit (92, 106) for deflecting the flowing through the ash collecting flue gas (32) from a radially outwardly directed flow direction radially inward , 11. Radiant heater (2) according to one of the preceding claims, characterized in that the ash collecting container (10) has a deflection unit (80, 92, 106) for deflecting the ash collecting container (10) flowing flue gas (32) in an S-shaped path which lies completely within the ash collection container (10). 12. radiant heater (2) according to claim 11, characterized in that the S-shaped track has a standing S-shape. 13. radiant heater (2) according to claim 11 or 12, characterized in that the S-shaped web has a horizontal S-shape. 14. Radiant heater (2) according to any one of claims 11 to 13, characterized in that in front of the S-shaped path is a flow path in which the flue gas (32) is widened radially in all directions. 15. radiant heater (2) according to any one of the preceding claims, characterized in that the ash collecting container (10) has a flue gas channel, which is divided around a deflecting plate (84) and reunited about a lower inlet into the ash collecting container (10). 16. radiant heater (2) according to any one of the preceding claims, characterized in that the upper part of the ash collecting container (10) is formed by a fireplace. 17 radiant heater (2) according to claim 16, characterized in that the chimney has a chimney roof through which the flue gas duct is deflected downwards. 18. radiant heater (2) according to claim 16 or 17, characterized in that the chimney has a lower nozzle, to which a chimney extension is attached, which has a length of at least 40 cm. 19. Radiant heater (2) according to one of the preceding claims, characterized in that the ash collecting container (10) without tools from the emission unit (6) is removable. 20. A method for heating by means of radiant heat, is burned in the solid fuel in a combustion unit (26) of a radiant heater (2) and combustion heat with an emission unit (6) in the vicinity of the radiant heater (2) is discharged, characterized in that hot flue gas of the firing unit (26) through the emission unit (6) and from there through an ash collecting container (10), in which at least part of the fly ash (94) from the flue gas (32) is eliminated. 4 sheets of drawings