EP0769658A1 - Gas radiant heater - Google Patents

Gas radiant heater Download PDF

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Publication number
EP0769658A1
EP0769658A1 EP96116842A EP96116842A EP0769658A1 EP 0769658 A1 EP0769658 A1 EP 0769658A1 EP 96116842 A EP96116842 A EP 96116842A EP 96116842 A EP96116842 A EP 96116842A EP 0769658 A1 EP0769658 A1 EP 0769658A1
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EP
European Patent Office
Prior art keywords
hood
burner
converter
heating gases
radiant heater
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Granted
Application number
EP96116842A
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German (de)
French (fr)
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EP0769658B1 (en
Inventor
Herbert Baumanns
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Individual
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Individual
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Priority to EP00121839A priority Critical patent/EP1077348B1/en
Publication of EP0769658A1 publication Critical patent/EP0769658A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00Stoves or ranges for gaseous fuels
    • F24C3/04Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/042Stoves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12Radiant burners
    • F23D14/125Radiant burners heating a wall surface to incandescence
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12Radiant burners
    • F23D14/151Radiant burners with radiation intensifying means other than screens or perforated plates

Definitions

  • the invention relates to a gas-heated heat radiator that can be used as a ceiling heater for heating halls.
  • Heat radiators in the form of incandescent radiators and in the form of dark radiators are known.
  • a ceramic plate is provided which has numerous through openings in which supplied gas is burned, the ceramic plate being heated to the annealing temperature and emitting heat. This results in high radiation temperatures, so that incandescent lamps are generally used at a greater height.
  • the combustion gases of a separate burner are passed through a tube that acts as a converter and emits the convection heat transferred to it by heat radiation.
  • the pipe must be heated to a relatively high temperature (approx. 300 ° C) are heated. This radiation temperature can only be reached if the gases are passed through the tube at high speed, so that the heat transfer value ⁇ becomes correspondingly large. This requires the use of a forced draft burner, which consumes electricity on the one hand and develops noise on the other.
  • the invention has for its object to provide a gas-heated heat radiator that generates a high heat output with low energy consumption.
  • the converter which absorbs the convection heat of the combustion gases and converts it into radiant heat, is a body with a larger surface than the effective radiation surface, along which the combustion gases pass.
  • the required temperature (approx. 300 ° C) of the converter is not achieved by high speeds of the heating gases, but by a greatly enlarged surface along which the heating gases pass and which is thereby heated convectively.
  • the partial areas of this surface illuminate each other. Since the externally effective radiation area of the converter is much smaller than the heat exchange area, the converter heats up to the required temperature.
  • the effective radiation area of the converter is the area projected in the radiation direction.
  • the heat radiator according to the invention can be referred to as an economical dark radiator. With him the Heating or combustion gases passed along a converter structure with a greatly enlarged surface. The large ratio of heat exchange area to radiation area means that the heating gases can flow along the converter relatively slowly. This improves the heat exchange.
  • the gas combustion can take place as atmospheric combustion, in which a forced draft burner is not required. Because of the even distribution of the gases, the gas consumption is low.
  • the converter can be dimensioned in such a way that the highest efficiency that is permitted is achieved. It is also advantageous that the heat radiator has a low weight, which is particularly important when the heat radiator is suspended from a hall roof. All components are easily accessible, making maintenance easier.
  • Another advantage is that the converter can be flowed through by the heating gases in the transverse direction and is thus heated uniformly at all points. This results in a uniform radiation intensity over the entire radiation area.
  • the converter is arranged in a hood which is open at the bottom and under which the combustion gases of the burner are passed.
  • the hood thus forms a kind of inverted lake, which absorbs the combustion gases and guides them along the converter.
  • the combustion gases pass under the hood along one edge, flow through the hood in the transverse direction, passing them along the converter, and leave the hood at the opposite edge. It takes place a gas and heat exchange also takes place in the longitudinal direction of the hood.
  • the hood is a structure that is open at the bottom, through the opening of which the converter is easily accessible for cleaning or maintenance purposes. This hood can have a reflection surface and / or a radiation surface.
  • the reflection factor In the case of a reflection surface, the reflection factor is large and the absorption factor is small, while in the case of a radiation surface the reflection factor is small and the absorption factor is large.
  • a radiation surface ideally acts as a black body, ie it absorbs incident radiation and in turn emits its own radiation.
  • the burner can be attached to one edge of the hood as a separate device. It contains a longitudinally running combustion tube, which preferably extends only over part of the combustion chamber length.
  • the outlet slot of the combustion chamber is shaped such that the heating gases emerge from the combustion chamber essentially uniformly distributed over the length of the outlet slot. This means that the flow resistance of the outlet slot is greater in the length range of the burner tube than in those length ranges in which the burner tube is not present.
  • the heat radiator has an elongated hood 10 which is designed as an inverted U-shaped trough which is open at the bottom and can have a length of several meters.
  • the hood 10 is e.g. made of metal and here it has a horizontally extending base plate 10a, to which side plates 10b and 10c which are directed obliquely downwards and outwards are connected.
  • the hood could also have an edgeless round structure or another polygon structure.
  • the hood 10 is provided on its top with thermal insulation 11, e.g. can consist of a layer of heat-insulating material.
  • the thermal insulation 11 consists of an auxiliary hood 12 placed on the hood 10, which forms a heat-insulating air space 13 with the hood 10.
  • the burner 15 extends along the one lower edge 14 of the hood 10.
  • This burner 15 has an elongated burner chamber 16 which is provided with air inlet openings 17 on its bottom and has a slot-shaped elongated outlet opening 18 for the heating gases on its upper side.
  • a horizontal burner tube 19 extends in the burner chamber 16 and has numerous gas outlet openings 20 on its upper side, which are arranged at regular intervals. Gas is supplied to the burner tube 19 from an external gas line 21, which gas emerges from the gas outlet openings 20 and is mixed burns with the outside air, so that 20 atmospherically burning flames arise above the gas outlet openings.
  • the burner tube 19 extends only over a portion of the length of the hood 10, here approximately over the middle third. So that the heating gases emerge from the outlet 18 in a uniform distribution over the entire length of the burner chamber 16, a plate 18a constricting the outlet opening 18 is provided in the central region of the length of the burner chamber 16, which exerts a throttling effect in this region, while the other regions of the Outlet opening 18 are not throttled. Furthermore, a guide plate 22 made of refractory material is provided in the burner chamber 16 in order to protect the hood 10 against direct exposure to the flames. The guide plate 22 extends over the outlet openings 20 and parallel to the side plate 10b of the hood 10. The outlet opening 18 is directed so that the heating gases emerging from it sweep along the side plate 10b of the hood 10.
  • the heating gases which have left the burner chamber 16 rise under the hood 10 and flow along the hood wall in order to flow out under the opposite edge 23 after a considerable part of their heat has been released.
  • the heating gases can, for example, be discharged directly into the environment. However, they can also be discharged through a chimney (not shown).
  • the converter 24 is fastened under the base plate 10a of the hood.
  • This converter 24 extends over the entire length of the hood 10. It contains a base plate 25, from which numerous parallel ribs 26 protrude downward, so that the converter is comb-shaped here, seen in an end view. Between the ribs 26 extend downwardly open guide channels 27 which run transversely to the longitudinal direction of the hood 10. At the front ends, the hood 10 is closed by end walls 28 and 29, respectively.
  • the heating gases flow along the converter 24 and through the guide channels 27. They heat the converter 24, which is made of steel or ceramic, for example. Because of the ribs 26, the converter 24 has a very large surface, which is in heat exchange with the heating gases. In this way, the converter heats up very strongly even when the heating gases flow slowly. On the other hand, the converter 24 emits radiant heat downwards.
  • the effective radiation area of the converter 24 is essentially determined by the vertical projection of the converter, that is to say it is substantially smaller than the heat exchange area. After the converter 24 has been heated up, there is a thermal equilibrium between the convection heat absorbed and the radiated heat emitted, the converter having a temperature of e.g. Assumes 300 ° C. After the heating gases have given off heat to the converter 24, they leave the hood at a temperature of approximately 150 ° C.
  • a wind protection grille 30 is arranged, which extends over the entire hood opening and prevents the draft from reaching the converter 24 and cooling it down.
  • the wind protection grille 30 also serves to increase the efficiency.
  • the parts of the hood 10, in particular the side plates 10b and 10c, can be designed as reflectors in order to reflect the heat radiation impinging on them and thus to conduct them obliquely into the space below the hood 10.
  • a broad radiation characteristic can be achieved in this way.
  • the hood 10 which is open at the bottom, causes the heating gases to flow along the guide channels 27 of the converter 24.
  • the hood forms a type of thermosiphon in which the heating gases first rise and are discharged downwards after their heat has been given off.
  • the converter 24 is designed such that the guide channels 27 run straight. It can also be designed as a labyrinth in which the heating gases pass through a meandering flow path.
  • a hood 10 open at the bottom is also provided.
  • the burner 15 is arranged here on the top of the hood and lets the heating gases emerge from its underside 15a into the hood.
  • the converter 24a is arranged in the top wall of the hood 10 and is designed here as a downwardly open (inverted) channel which runs parallel to the burner 15.
  • the converter 24a has smooth walls here, but the walls could also be structured.
  • the converter 24a has an essentially trapezoidal shape.
  • the walls of the converter 24a have a surface which is substantially larger than the area of the opening 32.
  • the area 32 forms the projection the area of the converter 24a. It is much smaller than the area of the converter.
  • the flow of the heating gases emanating from the burner 15 is designated 33 in FIG. 3.
  • the heating gases, which have left the burner 15, flow into the converter 24a on one side, flow obliquely upwards and downwards, and then exit under the edge of the hood 10.
  • the hood 10 is elongated and the burner 15 and the converter 24a run as elongated components in the longitudinal direction of the hood.
  • the converter is flowed through in the transverse direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Resistance Heating (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The heating gases are conducted along a converter (24) which has conductor ducts (27) open at the bottom. The converter has a structured surface providing a heat exchange surface at least double, preferably quadruple, the size of the active radiation surface. The converter consists of a ridged plate with downward pointing ridges (26) with ridges at least double the height of the thickness of the plate between the ridges. The converter is contained in a hood (10) open at the bottom and under which the heating gases from the burner (15) are conducted. The burner has a burner chamber (16) running along one edge (14) of the elongated hood. The heating gases flow crosswise to the hood's lengthwise direction and flow out at the opposite edge (23). The hood's outside has thermal insulation (11) with at least parts of the inside acting as a reflector surface. The burner has a burner pipe (19) with gas outlets (20) and longer than the burner chamber which has an outlet (18).

Description

Die Erfindung betrifft einen gasbeheizten Wärmestrahler, der als Deckenstrahler für die Beheizung von Hallen verwendbar ist.The invention relates to a gas-heated heat radiator that can be used as a ceiling heater for heating halls.

Bekannt sind Wärmestrahler in Form von Glühstrahlern und in Form von Dunkelstrahlern. Bei Glühstrahlern ist eine Keramikplatte vorgesehen, die zahlreiche durchgehende Öffnungen aufweist, in denen zugeführtes Gas verbrannt wird, wobei die Keramikplatte auf Glühtemperatur erhitzt wird und Wärme abstrahlt. Hierbei ergeben sich hohe Strahlungstemperaturen, so daß Glühstrahler in der Regel in größerer Höhe eingesetzt werden.Heat radiators in the form of incandescent radiators and in the form of dark radiators are known. In the case of incandescent lamps, a ceramic plate is provided which has numerous through openings in which supplied gas is burned, the ceramic plate being heated to the annealing temperature and emitting heat. This results in high radiation temperatures, so that incandescent lamps are generally used at a greater height.

Bei gasbeheizten Dunkelstrahlern werden die Verbrennungsgase eines separaten Brenners durch ein Rohr geleitet, das als Konverter wirkt und die ihm übertragene Konvektionswärme durch Wärmestrahlung abgibt. Hierzu muß das Rohr auf eine relativ hohe Temperatur (ca. 300°C) erwärmt werden. Diese Strahlungstemperatur kann nur erreicht werden, wenn die Gase mit hoher Geschwindigkeit durch das Rohr geleitet werden, so daß der Wärmeübergangswert α entsprechend groß wird. Dies erfordert den Einsatz eines Gebläsebrenners, der einerseits Strom verbraucht und andererseits Geräusche entwickelt.In gas-heated dark emitters, the combustion gases of a separate burner are passed through a tube that acts as a converter and emits the convection heat transferred to it by heat radiation. To do this, the pipe must be heated to a relatively high temperature (approx. 300 ° C) are heated. This radiation temperature can only be reached if the gases are passed through the tube at high speed, so that the heat transfer value α becomes correspondingly large. This requires the use of a forced draft burner, which consumes electricity on the one hand and develops noise on the other.

Der Erfindung liegt die Aufgabe zugrunde, einen gasbeheizten Wärmestrahler zu schaffen, der bei geringem Energieverbrauch eine hohe Wärmeleistung erzeugt.The invention has for its object to provide a gas-heated heat radiator that generates a high heat output with low energy consumption.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im Patentanspruch 1 angegebenen Merkmalen.This object is achieved according to the invention with the features specified in claim 1.

Bei dem erfindungsgemäßen Wärmestrahler ist der Konverter, der die Konvektionswärme der Verbrennungsgase aufnimmt und in Strahlungswärme umsetzt, ein Körper mit gegenüber der wirksamen Strahlungsfläche vergrößerter Oberfläche, an dem die Verbrennungsgase entlangstreichen. Die benötigte Temperatur (ca. 300°C) des Konverters wird nicht durch hohe Geschwindigkeiten der Heizgase erreicht, sondern durch eine stark vergrößerte Oberfläche, an der die Heizgase entlangstreichen und die dadurch konvektiv erwärmt wird. Die Teilflächen dieser Oberfläche strahlen sich gegenseitig an. Da die extern wirksame Strahlungsfläche des Konverters viel kleiner ist als die Wärmeaustauschfläche, erwärmt sich der Konverter auf die erforderliche Temperatur. Die wirksame Strahlungsfläche des Konverters ist die in Strahlungsrichtung projizierte Fläche.In the heat radiator according to the invention, the converter, which absorbs the convection heat of the combustion gases and converts it into radiant heat, is a body with a larger surface than the effective radiation surface, along which the combustion gases pass. The required temperature (approx. 300 ° C) of the converter is not achieved by high speeds of the heating gases, but by a greatly enlarged surface along which the heating gases pass and which is thereby heated convectively. The partial areas of this surface illuminate each other. Since the externally effective radiation area of the converter is much smaller than the heat exchange area, the converter heats up to the required temperature. The effective radiation area of the converter is the area projected in the radiation direction.

Der erfindungsgemäße Wärmestrahler kann als Spar-Dunkelstrahler bezeichnet werden. Bei ihm werden die Heiz- oder Verbrennungsgase entlang einer Konverterstruktur mit stark vergrößerter Oberfläche geleitet. Durch das große Verhältnis von Wärmeaustauschfläche zu Strahlungsfläche wird erreicht, daß die Heizgase relativ langsam an dem Konverter entlangströmen können. Dadurch wird der Wärmeaustausch verbessert. Die Gasverbrennung kann als atmosphärische Verbrennung erfolgen, bei der ein Gebläsebrenner nicht erforderlich ist. Wegen der gleichmäßigen Verteilung der Gase ergibt sich ein niedriger Gasverbrauch. Der Konverter kann so dimensioniert werden, daß der höchste Wirkungsgrad erzielt wird, der zulässig ist. Vorteilhaft ist weiterhin, daß der Wärmestrahler ein geringes Gewicht hat, was insbesondere bei der Aufhängung des Wärmestrahlers an einem Hallendach von Bedeutung ist. Sämtliche Komponenten sind leicht zugänglich, so daß die Wartung erleichtert wird.The heat radiator according to the invention can be referred to as an economical dark radiator. With him the Heating or combustion gases passed along a converter structure with a greatly enlarged surface. The large ratio of heat exchange area to radiation area means that the heating gases can flow along the converter relatively slowly. This improves the heat exchange. The gas combustion can take place as atmospheric combustion, in which a forced draft burner is not required. Because of the even distribution of the gases, the gas consumption is low. The converter can be dimensioned in such a way that the highest efficiency that is permitted is achieved. It is also advantageous that the heat radiator has a low weight, which is particularly important when the heat radiator is suspended from a hall roof. All components are easily accessible, making maintenance easier.

Ein weiterer Vorteil besteht darin, daß der Konverter von den Heizgasen in Querrichtung durchströmt werden kann und somit an allen Stellen gleichmäßig erwärmt wird. Dadurch ergibt sich eine gleichmäßige Strahlungsintensität über die gesamte Strahlungsfläche.Another advantage is that the converter can be flowed through by the heating gases in the transverse direction and is thus heated uniformly at all points. This results in a uniform radiation intensity over the entire radiation area.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist der Konverter in einer nach unten offenen Haube angeordnet, unter die die Verbrennungsgase des Brenners geleitet werden. Die Haube bildet somit gewissermaßen einen umgekehrten See, der die Verbrennungsgase aufnimmt und an dem Konverter entlangleitet. Die Verbrennungsgase treten entlang des einen Randes unter die Haube, durchströmen die Haube in Querrichtung, wobei sie an dem Konverter entlanggeführt werden, und verlassen die Haube am gegenüberliegenden Rand. Dabei findet ein Gas- und Wärmeaustausch auch in Längsrichtung der Haube statt. Die Haube stellt eine nach unten offene Struktur dar, durch deren Öffnung der Konverter zu Reinigungs- oder Wartungszwecken leicht zugänglich ist. Diese Haube kann eine Reflexionsfläche und/oder eine Strahlungsfläche aufweisen. Bei einer Reflexionsfläche ist der Reflexionsfaktor groß und der Absorptionsfaktor klein, während bei einer Strahlungsfläche der Reflexionsfaktor klein und der Absorptionsfaktor groß ist. Eine Strahlungsfläche wirkt im Idealfall als schwarzer Körper, d.h. sie absorbiert einfallende Strahlung und strahlt ihrerseits Eigenstrahlung ab.According to a preferred embodiment of the invention, the converter is arranged in a hood which is open at the bottom and under which the combustion gases of the burner are passed. The hood thus forms a kind of inverted lake, which absorbs the combustion gases and guides them along the converter. The combustion gases pass under the hood along one edge, flow through the hood in the transverse direction, passing them along the converter, and leave the hood at the opposite edge. It takes place a gas and heat exchange also takes place in the longitudinal direction of the hood. The hood is a structure that is open at the bottom, through the opening of which the converter is easily accessible for cleaning or maintenance purposes. This hood can have a reflection surface and / or a radiation surface. In the case of a reflection surface, the reflection factor is large and the absorption factor is small, while in the case of a radiation surface the reflection factor is small and the absorption factor is large. A radiation surface ideally acts as a black body, ie it absorbs incident radiation and in turn emits its own radiation.

Der Brenner kann an dem einen Rand der Haube als separate Vorrichtung angebracht sein. Er enthält ein längslaufendes Brennrohr, das sich vorzugsweise nur über einen Teil der Brennkammerlänge erstreckt. Der Auslaßschlitz der Brennkammer ist so geformt, daß die Heizgase über die Länge des Auslaßschlitzes im wesentlichen gleichmäßig verteilt aus der Brennkammer austreten. Dies bedeutet, daß der Strömungswiderstand des Auslaßschlitzes im Längenbereich des Brennerrohres größer ist als in denjenigen Längenbereichen, in denen das Brennerrohr nicht vorhanden ist.The burner can be attached to one edge of the hood as a separate device. It contains a longitudinally running combustion tube, which preferably extends only over part of the combustion chamber length. The outlet slot of the combustion chamber is shaped such that the heating gases emerge from the combustion chamber essentially uniformly distributed over the length of the outlet slot. This means that the flow resistance of the outlet slot is greater in the length range of the burner tube than in those length ranges in which the burner tube is not present.

Im folgenden werden unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert.Exemplary embodiments of the invention are explained in more detail below with reference to the drawings.

Es zeigen:

Fig. 1
einen Querschnitt durch eine erste Ausführungsform des Wärmestrahlers,
Fig. 2
einen Längsschnitt entlang der Linie II-II von Fig. 1 und
Fig. 3
einen Längsschnitt durch eine zweite Ausführungsform des Wärmestrahlers.
Show it:
Fig. 1
3 shows a cross section through a first embodiment of the heat radiator,
Fig. 2
a longitudinal section along the line II-II of Fig. 1 and
Fig. 3
a longitudinal section through a second embodiment of the heat radiator.

Der Wärmestrahler weist eine langgestreckte Haube 10 auf, die als nach unten offene umgekehrt-U-förmige Wanne ausgebildet ist und eine Länge von mehreren Metern haben kann. Die Haube 10 besteht z.B. aus Metall und sie hat hier eine horizontal verlaufende Basisplatte 10a, an die sich schräg nach unten und außen gerichtete Seitenplatten 10b und 10c anschließen. Die Haube könnte auch eine kantenlose Rundstruktur oder eine andere Polygonstruktur aufweisen. Die Haube 10 ist auf ihrer Oberseite mit einer Wärmedämmung 11 versehen, die z.B. aus einer Schicht aus wärmedämmenden Material bestehen kann. Bei dem vorliegenden Ausführungsbeispiel besteht die Wärmedämmung 11 aus einer auf die Haube 10 aufgesetzten Hilfshaube 12, die mit die Haube 10 einen wärmedämmenden Luftraum 13 bildet.The heat radiator has an elongated hood 10 which is designed as an inverted U-shaped trough which is open at the bottom and can have a length of several meters. The hood 10 is e.g. made of metal and here it has a horizontally extending base plate 10a, to which side plates 10b and 10c which are directed obliquely downwards and outwards are connected. The hood could also have an edgeless round structure or another polygon structure. The hood 10 is provided on its top with thermal insulation 11, e.g. can consist of a layer of heat-insulating material. In the present embodiment, the thermal insulation 11 consists of an auxiliary hood 12 placed on the hood 10, which forms a heat-insulating air space 13 with the hood 10.

Längs des einen unteren Randes 14 der Haube 10 erstreckt sich der Brenner 15. Dieser Brenner 15 weist eine langgestreckte Brennerkammer 16 auf, die an ihrem Boden mit Lufteintrittsöffnungen 17 versehen ist und an ihrer Oberseite eine schlitzförmige langgestreckte Austrittsöffnung 18 für die Heizgase aufweist. In der Brennerkammer 16 erstreckt sich ein horizontales Brennerrohr 19, das an seiner Oberseite zahlreiche Gasaustrittsöffnungen 20 aufweist, die in regelmäßigen Abständen angeordnet sind. Dem Brennerrohr 19 wird von einer externen Gasleitung 21 Gas zugeführt, das aus den Gasaustrittsöffnungen 20 austritt und unter Mischung mit der Außenluft verbrennt, so daß über den Gasaustrittsöffnungen 20 atmosphärisch brennende Flammen entstehen.The burner 15 extends along the one lower edge 14 of the hood 10. This burner 15 has an elongated burner chamber 16 which is provided with air inlet openings 17 on its bottom and has a slot-shaped elongated outlet opening 18 for the heating gases on its upper side. A horizontal burner tube 19 extends in the burner chamber 16 and has numerous gas outlet openings 20 on its upper side, which are arranged at regular intervals. Gas is supplied to the burner tube 19 from an external gas line 21, which gas emerges from the gas outlet openings 20 and is mixed burns with the outside air, so that 20 atmospherically burning flames arise above the gas outlet openings.

Das Brennerrohr 19 erstreckt sich nur über einen Teilbereich der Länge der Haube 10, hier etwa über das mittlere Drittel. Damit die Heizgase in gleichmäßiger Verteilung über die gesamte Länge der Brennerkammer 16 aus dem Auslaß 18 austreten, ist im mittleren Bereich der Länge der Brennerkammer 16 ein die Auslaßöffnung 18 verengendes Blech 18a vorgesehen, das in diesem Bereich eine Drosselwirkung ausübt, während die anderen Bereiche der Auslaßöffnung 18 ungedrosselt sind. Ferner ist in der Brennerkammer 16 eine Leitplatte 22 aus feuerfestem Material vorgesehen, um die Haube 10 vor direkter Einwirkung der Flammen zu schützen. Die Leitplatte 22 verläuft über den Austrittsöffnungen 20 und parallel zu der Seitenplatte 10b der Haube 10. Die Auslaßöffnung 18 ist so gerichtet, daß die aus ihr austretenden Heizgase an der Seitenplatte 10b der Haube 10 entlangstreichen.The burner tube 19 extends only over a portion of the length of the hood 10, here approximately over the middle third. So that the heating gases emerge from the outlet 18 in a uniform distribution over the entire length of the burner chamber 16, a plate 18a constricting the outlet opening 18 is provided in the central region of the length of the burner chamber 16, which exerts a throttling effect in this region, while the other regions of the Outlet opening 18 are not throttled. Furthermore, a guide plate 22 made of refractory material is provided in the burner chamber 16 in order to protect the hood 10 against direct exposure to the flames. The guide plate 22 extends over the outlet openings 20 and parallel to the side plate 10b of the hood 10. The outlet opening 18 is directed so that the heating gases emerging from it sweep along the side plate 10b of the hood 10.

Die Heizgase, die die Brennerkammer 16 verlassen haben, steigen unter der Haube 10 auf und strömen an der Haubenwand entlang, um nach Abgabe eines erheblichen Teils ihrer Wärme unter dem gegenüberliegenden Rand 23 hindurch abzuströmen. Die Heizgase können beispielsweise unmittelbar in die Umgebung abgeleitet werden. Sie können aber auch durch einen (nicht dargestellten) Kamin abgeführt werden.The heating gases which have left the burner chamber 16 rise under the hood 10 and flow along the hood wall in order to flow out under the opposite edge 23 after a considerable part of their heat has been released. The heating gases can, for example, be discharged directly into the environment. However, they can also be discharged through a chimney (not shown).

Unter der Basisplatte 10a der Haube ist der Konverter 24 befestigt. Dieser Konverter 24 erstreckt sich über die gesamte Länge der Haube 10. Er enthält eine Basisplatte 25, von der zahlreiche parallele Rippen 26 nach unten abstehen, so daß der Konverter hier - in Stirnansicht gesehen - kammförmig ausgebildet ist. Zwischen den Rippen 26 erstrecken sich nach unten offene Leitkanäle 27, die quer zur Längsrichtung der Haube 10 verlaufen. An den stirnseitigen Enden ist die Haube 10 durch Stirnwände 28 bzw. 29 abgeschlossen.The converter 24 is fastened under the base plate 10a of the hood. This converter 24 extends over the entire length of the hood 10. It contains a base plate 25, from which numerous parallel ribs 26 protrude downward, so that the converter is comb-shaped here, seen in an end view. Between the ribs 26 extend downwardly open guide channels 27 which run transversely to the longitudinal direction of the hood 10. At the front ends, the hood 10 is closed by end walls 28 and 29, respectively.

Die Heizgase strömen nach dem Verlassen der Brennerkammer 16 an dem Konverter 24 entlang und durch die Leitkanäle 27 hindurch. Dabei heizen sie den Konverter 24, der beispielsweise aus Stahl oder Keramik besteht, auf. Wegen der Rippen 26 hat der Konverter 24 eine sehr große Oberfläche, die in Wärmeaustausch mit den Heizgasen steht. Auf diese Weise heizt der Konverter sich selbst bei langsamer Strömungsgeschwindigkeit der Heizgase sehr stark auf. Andererseits gibt der Konverter 24 Strahlungswärme nach unten ab. Die wirksame Strahlungsfläche des Konverters 24 wird im wesentlichen durch die vertikale Projektion des Konverters bestimmt, ist also wesentlich kleiner als die Wärmeaustauschfläche. Nach Aufheizung des Konverters 24 entsteht ein thermisches Gleichgewicht zwischen der aufgenommenen Konvektionswärme und der abgegebenen Strahlungswärme, wobei der Konverter eine Temperatur von z.B. 300°C annimmt. Nachdem die Heizgase Wärme an den Konverter 24 abgegeben haben, verlassen sie die Haube mit einer Temperatur von etwa 150°C.After leaving the burner chamber 16, the heating gases flow along the converter 24 and through the guide channels 27. They heat the converter 24, which is made of steel or ceramic, for example. Because of the ribs 26, the converter 24 has a very large surface, which is in heat exchange with the heating gases. In this way, the converter heats up very strongly even when the heating gases flow slowly. On the other hand, the converter 24 emits radiant heat downwards. The effective radiation area of the converter 24 is essentially determined by the vertical projection of the converter, that is to say it is substantially smaller than the heat exchange area. After the converter 24 has been heated up, there is a thermal equilibrium between the convection heat absorbed and the radiated heat emitted, the converter having a temperature of e.g. Assumes 300 ° C. After the heating gases have given off heat to the converter 24, they leave the hood at a temperature of approximately 150 ° C.

In der unteren Öffnung der Haube 10 ist ein Windschutzgitter 30 angeordnet, das sich über die gesamte Haubenöffnung erstreckt und verhindert, das Zugluft an den Konverter 24 gelangt und diesen abkühlt. Das Windschutzgitter 30 dient auch der Wirkungsgraderhöhung.In the lower opening of the hood 10, a wind protection grille 30 is arranged, which extends over the entire hood opening and prevents the draft from reaching the converter 24 and cooling it down. The wind protection grille 30 also serves to increase the efficiency.

Die Teile der Haube 10, insbesondere die Seitenplatten 10b und 10c, können als Reflektoren ausgebildet sein, um die auf sie auftreffende Wärmestrahlung zu reflektieren und somit gezielt schräg in den Raum unterhalb der Haube 10 zu leiten. Auf diese Weise kann eine breite Strahlungscharakteristik erzielt werden. Es besteht auch die Möglichkeit, Teile der Haube aus strahlungsabsorbierendem Material herzustellen, das Strahlungswärme aufnimmt und als Eigenstrahler wirkt.The parts of the hood 10, in particular the side plates 10b and 10c, can be designed as reflectors in order to reflect the heat radiation impinging on them and thus to conduct them obliquely into the space below the hood 10. A broad radiation characteristic can be achieved in this way. There is also the possibility of producing parts of the hood from radiation-absorbing material that absorbs radiant heat and acts as an internal radiator.

Die nach unten offene Haube 10 bewirkt eine Strömung der Heizgase entlang der Leitkanäle 27 des Konverters 24. Die Haube bildet eine Art Thermosiphon, in dem die Heizgase zunächst aufsteigen und nach Abgabe ihrer Wärme nach unten abgeleitet werden. Der Konverter 24 ist bei dem vorliegenden Ausführungsbeispiel so ausgebildet, daß die Leitkanäle 27 gerade verlaufen. Er kann auch als Labyrinth ausgebildet sein, in welchem die Heizgase einen meanderförmigen Strömungsweg durchlaufen.The hood 10, which is open at the bottom, causes the heating gases to flow along the guide channels 27 of the converter 24. The hood forms a type of thermosiphon in which the heating gases first rise and are discharged downwards after their heat has been given off. In the present exemplary embodiment, the converter 24 is designed such that the guide channels 27 run straight. It can also be designed as a labyrinth in which the heating gases pass through a meandering flow path.

Bei dem Ausführungsbeispiel von Fig. 3 ist ebenfalls eine nach unten offene Haube 10 vorgesehen. Der Brenner 15 ist hier an der Oberseite der Haube angeordnet und läßt die Heizgase aus seiner Unterseite 15a in die Haube hinein austreten. In der Oberwand der Haube 10 ist der Konverter 24a angeordnet, der hier als nach unten offene (umgekehrte) Rinne ausgebildet ist, die parallel zu dem Brenner 15 verläuft. Der Konverter 24a weist hier glatte Wände auf, jedoch könnten die Wände ebenfalls strukturiert sein. Der Konverter 24a hat im wesentlichen Trapezform. Die Wände des Konverters 24a haben eine Oberfläche, die wesentlich größer ist die Fläche der Öffnung 32. Die Fläche 32 bildet die Projektion der Fläche des Konverters 24a. Sie ist wesentlich kleiner als die Fläche des Konverters.In the embodiment of FIG. 3, a hood 10 open at the bottom is also provided. The burner 15 is arranged here on the top of the hood and lets the heating gases emerge from its underside 15a into the hood. The converter 24a is arranged in the top wall of the hood 10 and is designed here as a downwardly open (inverted) channel which runs parallel to the burner 15. The converter 24a has smooth walls here, but the walls could also be structured. The converter 24a has an essentially trapezoidal shape. The walls of the converter 24a have a surface which is substantially larger than the area of the opening 32. The area 32 forms the projection the area of the converter 24a. It is much smaller than the area of the converter.

Die von dem Brenner 15 ausgehende Strömung der Heizgase ist in Fig. 3 mit 33 bezeichnet. Die Heizgase, die den Brenner 15 verlassen haben, strömen an einer Seite in den Konverter 24a hinein, durchströmen ihn schräg nach oben und wieder nach unten, um dann unter dem Rand der Haube 10 auszutreten. Ebenso wie bei dem ersten Ausführungsbeispiel ist die Haube 10 langgestreckt und der Brenner 15 und der Konverter 24a verlaufen als langgestreckte Komponenten in Längsrichtung der Haube. Der Konverter wird bei diesem Ausführungsbeispiel in Querrichtung durchströmt.The flow of the heating gases emanating from the burner 15 is designated 33 in FIG. 3. The heating gases, which have left the burner 15, flow into the converter 24a on one side, flow obliquely upwards and downwards, and then exit under the edge of the hood 10. As in the first exemplary embodiment, the hood 10 is elongated and the burner 15 and the converter 24a run as elongated components in the longitudinal direction of the hood. In this embodiment, the converter is flowed through in the transverse direction.

Claims (12)

Gasbeheizter Wärmestrahler mit einem Brenner (15), dessen Heizgase an einem Konverter (24) entlanggeführt werden, welcher Strahlungswärme an die Umgebung abgibt,
dadurch gekennzeichnet,
daß der Konverter (24;24a) ein Körper mit gegenüber der wirksamen Strahlungsfläche vergrößerter Oberfläche ist, bei dem die den Heizgasen ausgesetzte Wärmeaustauschfläche mindestens doppelt so groß ist - vorzugsweise mindestens viermal so groß - wie die wirksame Strahlungsfläche.
Gas-heated heat radiator with a burner (15), the heating gases of which are guided along a converter (24) which emits radiant heat to the environment,
characterized,
that the converter (24; 24a) is a body with a larger surface than the effective radiation area, in which the heat exchange area exposed to the heating gases is at least twice as large - preferably at least four times as large - as the effective radiation area.
Wärmestrahler nach Anspruch 1, dadurch gekennzeichnet, daß der Konverter (24) in einer nach unten offenen Haube (10) angeordnet ist, unter die die Heizgase des Brenners (15) geleitet werden.Radiant heater according to claim 1, characterized in that the converter (24) is arranged in a hood (10) which is open at the bottom and under which the heating gases of the burner (15) are passed. Wärmestrahler nach Anspruch 2, dadurch gekennzeichnet, daß der Brenner (15) eine Brennerkammer (16) aufweist, die längs des einen Randes (14) der langgestreckten Haube (10) verläuft, derart, daß die Heizgase die Haube (10) quer zu deren Längsrichtung durchströmen und am gegenüberliegenden Rand (23) abströmen.Heat radiator according to claim 2, characterized in that the burner (15) has a burner chamber (16) which runs along one edge (14) of the elongate hood (10), such that the heating gases cross the hood (10) Flow through in the longitudinal direction and flow out at the opposite edge (23). Wärmestrahler nach Anspruch 2, dadurch gekennzeichnet, daß der Brenner (15) an einem Ende der langgestreckten Haube (10) angeordnet ist, wobei die Heizgase die Haube (10) in Längsrichtung durchströmen.Heat radiator according to claim 2, characterized in that the burner (15) is arranged at one end of the elongated hood (10), the heating gases flowing through the hood (10) in the longitudinal direction. Wärmestrahler nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Haube (10) an ihrer Außenseite eine Wärmedämmung (11) aufweist.Radiant heater according to one of claims 2 to 4, characterized in that the hood (10) has thermal insulation (11) on its outside. Wärmestrahler nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Innenseite der Haube (10) mindestens abschnittsweise als Reflektorfläche ausgebildet ist.Heat radiator according to one of claims 2 to 5, characterized in that the inside of the hood (10) is designed at least in sections as a reflector surface. Wärmestrahler nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Innenseite der Haube (10) mindestens abschnittsweise als Strahlungsfläche ausgebildet ist.Radiant heater according to one of claims 2 to 6, characterized in that the inside of the hood (10) is designed at least in sections as a radiation surface. Wärmestrahler nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Brenner (15) ein sich in einer Brennerkammer (16) erstreckendes Brennerrohr (19) mit Gasaustrittsöffnungen (20) aufweist, dessen Länge kürzer ist als die Brennerkammer (16) und daß die Brennerkammer (16) einen Auslaß (18) aufweist, dessen Breite im Längenbereich des Brennerrohres (19) verringert ist.Heat radiator according to one of claims 1 to 7, characterized in that the burner (15) has a burner tube (19) with gas outlet openings (20) extending in a burner chamber (16), the length of which is shorter than the burner chamber (16) and in that the burner chamber (16) has an outlet (18), the width of which is reduced in the longitudinal region of the burner tube (19). Wärmestrahler nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß an der Öffnung der Haube (10) ein Windschutzgitter (30) vorgesehen ist.Radiant heater according to one of claims 1 to 8, characterized in that a wind protection grille (30) is provided at the opening of the hood (10). Wärmestrahler nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Konverter (24) nach unten offene Leitkanäle (27) aufweist, die ganz oder abschnittsweise quer zur Längsrichtung der Haube (10) verlaufen.Radiant heater according to one of Claims 1 to 9, characterized in that the converter (24) has guide channels (27) which are open at the bottom and which extend in whole or in sections transversely to the longitudinal direction of the hood (10). Wärmestrahler nach Anspruch 10, dadurch gekennzeichnet, daß der Konverter (24) aus einer Rippenstruktur mit nach unten weisenden Rippen (26) besteht, wobei die Heizgase parallel zu den Rippen an diesen entlangstreichen.Heat radiator according to claim 10, characterized in that the converter (24) consists of a rib structure with ribs (26) pointing downwards, the heating gases sweeping parallel to the ribs. Wärmestrahler nach einem der Ansprüche 1-11, dadurch gekennzeichnet, daß der Konverter (24a) aus einer länglichen nach unten offenen Rinne besteht, die von den Heizgasen durchströmt wird.Radiant heater according to one of claims 1-11, characterized in that the converter (24a) consists of an elongate channel which is open at the bottom and through which the heating gases flow.
EP96116842A 1995-10-21 1996-10-19 Gas radiant heater Expired - Lifetime EP0769658B1 (en)

Priority Applications (1)

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EP00121839A EP1077348B1 (en) 1995-10-21 1996-10-19 Gas radiant heater

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DE29516643U 1995-10-21
DE29516643U DE29516643U1 (en) 1995-10-21 1995-10-21 Gas heated radiant heater

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EP0769658A1 true EP0769658A1 (en) 1997-04-23
EP0769658B1 EP0769658B1 (en) 2001-04-11

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EP96116842A Expired - Lifetime EP0769658B1 (en) 1995-10-21 1996-10-19 Gas radiant heater

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7116900B2 (en) 2003-04-01 2006-10-03 Radiant Optics, Inc. Radiant energy source systems, devices, and methods capturing, controlling, or recycling gas flows
WO2004090424A2 (en) * 2003-04-01 2004-10-21 Radiant Optics, Inc. Radiant energy source systems, devices and methods

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Publication number Priority date Publication date Assignee Title
US4269590A (en) * 1977-02-12 1981-05-26 Herbert Baumanns Radiant burner
US4727854A (en) * 1986-05-08 1988-03-01 Johnson Arthur C W High efficiency infrared radiant energy heating system and reflector therefor
EP0486741A1 (en) * 1989-11-17 1992-05-27 Société dite : TRIATHERM SARL Gas heating apparatus by infrared radiation

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DE7309345U (en) * 1973-09-20 Jenewein & Gapp Gmbh Gas stove
FR2190249A5 (en) * 1972-06-22 1974-01-25 Utilisation Ration Gaz
US3763847A (en) * 1972-09-07 1973-10-09 Foster Miller Ass Radiant heater
US4507083A (en) * 1982-09-21 1985-03-26 Joseph Fraioli Gas-fired infrared projection heater
US4432727A (en) * 1982-09-21 1984-02-21 Joseph Fraioli Gas-fired infrared projection heater
DE3415058A1 (en) * 1984-04-21 1985-10-31 GoGas Goch GmbH & Co, 4600 Dortmund Radiant burner
US4702693A (en) * 1986-12-03 1987-10-27 Joseph Fraioli Gas-fired infrared heater
DE3903540A1 (en) * 1989-02-07 1990-08-09 Guenter Petz Radiant heater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269590A (en) * 1977-02-12 1981-05-26 Herbert Baumanns Radiant burner
US4727854A (en) * 1986-05-08 1988-03-01 Johnson Arthur C W High efficiency infrared radiant energy heating system and reflector therefor
EP0486741A1 (en) * 1989-11-17 1992-05-27 Société dite : TRIATHERM SARL Gas heating apparatus by infrared radiation

Also Published As

Publication number Publication date
EP1077348A1 (en) 2001-02-21
ATE200567T1 (en) 2001-04-15
DE59606754D1 (en) 2001-05-17
EP1077348B1 (en) 2003-09-17
ATE250202T1 (en) 2003-10-15
DE59610724D1 (en) 2003-10-23
EP0769658B1 (en) 2001-04-11
DE29516643U1 (en) 1997-02-20

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