EP3410820B1 - Infrared heating with structured front wall - Google Patents

Infrared heating with structured front wall Download PDF

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Publication number
EP3410820B1
EP3410820B1 EP18162696.1A EP18162696A EP3410820B1 EP 3410820 B1 EP3410820 B1 EP 3410820B1 EP 18162696 A EP18162696 A EP 18162696A EP 3410820 B1 EP3410820 B1 EP 3410820B1
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Prior art keywords
heating
front wall
infrared heating
heating system
infrared
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EP18162696.1A
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German (de)
French (fr)
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EP3410820A1 (en
Inventor
Fabian Digel
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Digel Sticktech & Co KG GmbH
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Digel Sticktech & Co KG GmbH
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/10Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/20Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/20Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014Heaters using resistive wires or cables not provided for in H05B3/54
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/032Heaters specially adapted for heating by radiation heating
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/037Heaters with zones of different power density

Definitions

  • the invention relates to an infrared heater with a front wall and a rear wall, between which a heating arrangement with at least one heating circuit is arranged, the heating circuit comprising a heating conductor.
  • radiators for heating systems that run on fossil fuels work according to the convection principle. They have a large surface area and heat the air that passes by them. This creates turbulence that distributes dust throughout the room.
  • Infrared heating on the other hand, hardly warms the air. It radiates its energy directly onto people and objects in the living space. This efficient transmission path ensures that infrared heaters are superior to other types of heating with electricity as well as to central heating systems based on fossil fuels in terms of cost and economy.
  • the U.S. 3,453,413 A discloses a heating element with a rough surface.
  • the U.S. 4,990,747 A discloses a ceramic heating plate which has a ceramic layer with particles on its upper side.
  • the U.S. 2,579,964 A discloses a heating element which is covered with a textile cover.
  • the DE 20 2006 017 490 U1 discloses an infrared ceramic heater.
  • the DE 10 2009 032 260 A1 discloses an infrared heating device in which a heating conductor can be woven into a textile material.
  • the DE 20 2006 007 228 U1 apparently an infrared surface heating element in which a special glass is coated with a nanoceramic.
  • the object of the present invention is to propose an infrared heater that is even more efficient.
  • an infrared heater with a front wall and a rear wall, between which a heating arrangement with at least one heating circuit is arranged, wherein the heating circuit comprises a heating conductor and the front wall is structured on the surface of its outside, the front wall itself by a mechanical processing and is structured under an optionally present coating.
  • the structuring preferably has a height of at least 0.5 mm.
  • the structure should have a maximum height of about 10 mm.
  • the front wall has a smooth surface on the outside, most of the heat output goes up. If, on the other hand, the front wall is structured, this is suppressed and a higher radiation power arises due to an enlargement of the surface of the front wall due to the structuring.
  • the front wall can for example be structured in the manner of a leather or skin structure. Further structuring examples are a diamond shape, the reproduction of a linen structure or a diamond structure or hemispherical recesses.
  • the front wall can be ceramic coated at least on its outside. This measure can also improve the radiation output of the infrared heater.
  • the front wall can be coated with a ceramic powder. Such a coating also improves the heat resistance of the front wall. In particular, color variations due to great heating of the front wall can be avoided in this way.
  • the coating is preferably so thin that the structure of the top of the front wall is retained.
  • the front wall can be formed from a steel sheet. If a steel sheet is used instead of conventional aluminum, the front wall can heat up more quickly. In addition, the thickness of the front wall can be reduced. A faster heat release to the outside can take place. This can reduce the internal temperature of the infrared heater.
  • the front wall can have a thickness in the range from 0.5 to 1.5 mm, preferably the thickness is in the range from 0.75 to 1 mm.
  • a steel sheet can also be structured relatively easily.
  • the structuring of the front side of the front wall also increases the stability of the front wall, which in turn means that the thickness of the front wall made of sheet steel can be reduced.
  • the rear wall of the infrared heater can be made from sheet steel, in particular from chrome steel sheet.
  • the back wall can be polished or marbled. Marbling the back wall has the advantage that fingerprints are practically invisible. Both the design of the rear wall as a highly polished rear wall and as a marbled rear wall means that only a small amount of heat is given off to the rear.
  • Insulation can be provided between the heating arrangement and the rear wall, which means that little heat is radiated to the rear and a large part of the heat from the infrared heater is given off to the front via the front wall.
  • the effectiveness of the infrared heating can be further improved in that a reflective layer or coating is provided between the heating arrangement and the rear wall.
  • the manufacture of the infrared heater is particularly simple when the front and rear walls are glued and / or locked together.
  • the heating conductor of the heating circuit can run bifilar at least in sections. This means that the current, in particular alternating current, which is carried in the heating conductor, flows in opposite directions in the conductor sections of the bifilar sections, so that the electromagnetic fields of the two conductor sections generated by the current largely compensate each other.
  • the electromagnetic compatibility of such an infrared heater is therefore significantly improved.
  • the first half of the heating conductor of the heating circuit can run to a turning point and then the second half of the heating conductor can be guided parallel to the first half, in particular at a small distance from the first half of the conductor.
  • part of the first half of the heating conductor runs parallel to part of the second half of the heating conductor.
  • the connections of the heating conductor can also be close to one another, that is, they can be arranged at a small distance from one another. This also facilitates the electrical connection of the heating conductor.
  • the heating conductor of the heating circuit can be bifilar over at least 80% of its length. This measure can ensure that electromagnetic fields are largely compensated.
  • the heating circuit is attached to a carrier by means of a thread.
  • the heating circuit is held securely on the carrier by the thread. Nevertheless, the heating circuit or the Move the heating conductor slightly between the thread and the carrier. In particular, the heating conductor can expand and contract again when heated. With this type of attachment, a certain mobility and elasticity of the heating conductor is maintained, which contributes to an increased service life of the heating conductor.
  • the carrier can be formed from a flexible material. This makes it easier to sew the heating circuit to the carrier by means of the thread.
  • the flexible carrier can in particular be stretchable to a limited extent. This also makes it possible for the carrier to follow the temperature-dependent movements of the heating conductor.
  • the carrier can be designed as a polyester fabric, glass fabric or glass-silicone fabric.
  • the carrier can be stretchable in the range of 10% to 20%.
  • the heating circuit can be designed in a meandering shape, in particular arranged in a meandering shape on the carrier. This can increase the effectiveness of the infrared heating, as a longer heating circuit can be laid.
  • one or the heating circuit can be laid closer than another or the heating circuit in a central area of the heating arrangement. This can mean that the distance between sections of the heating circuit is greater in a central area of the heating arrangement than in an edge area.
  • the loops of the meandering shape can be laid closer.
  • legs of a loop of the meandering heating circuit can have a smaller spacing when the heating circuit is laid in an edge area compared to a heating circuit or section of the heating circuit that is laid in a central area of the heating arrangement. In this way it can be ensured that a similar heating power is generated in the edge area as in the central area of the heating arrangement.
  • a heating conductor or heating conductor section with a lower electrical resistance is arranged in an edge region of the heating arrangement than in a central region of the heating arrangement.
  • a heating conductor with a lower resistance becomes warmer with the same current, so that it can also be ensured in this way that a similar heating power can be generated in the edge area of the heating arrangement as in the central area of the heating arrangement.
  • the electrical resistance can be influenced by the choice of material for the heating conductor.
  • the diameter of the heating conductor can be varied. In order to reduce the resistance, a larger cross section, in particular diameter, of the heating conductor can be used.
  • the Fig. 1 shows an infrared heater 1 in a sectional view.
  • the infrared heater 1 has a front wall 2 and a rear wall 3.
  • the front wall 2 and the rear wall 3 are clipped together at point 4. At point 5 they are glued together.
  • a heating arrangement 6, which will be described in more detail below, is arranged between the front wall 2 and the rear wall 3.
  • a reflective layer 7 and then insulation 8 is provided behind the heating arrangement 6. This is to avoid that heat radiation is given off to the rear.
  • the front wall 2 is preferably made of sheet steel and structured on its outside 9, that is to say on the side from which heat is to be radiated.
  • the Fig. 2 shows the heating arrangement 6. It comprises a carrier 10 which can be formed from flexible material. The material can have a certain elasticity.
  • a heating circuit 11 is fixed on the carrier 10.
  • the heating circuit 11 comprises a heating conductor 12, the first half 12.1 of the heating conductor 12 being guided at a close distance from the second half 12.2.
  • the heating conductor 12 accordingly runs bifilar.
  • a current running in the direction of the arrow 13 in the first half 12.1 runs in the second half 12.2 in the direction of the arrow 14, that is to say in the opposite direction.
  • the heating circuit 11 is sewn to the carrier 10 with a thread 15. Because the thread 15 only spans the heating circuit 11, it is possible for the heating conductor 12 to expand and contract below the thread 15. As a result, the mechanical stress on the heating conductor 12 is kept low. It can also be seen that the connections 16, 17 of the heating conductor 12 are arranged at a small distance from one another.
  • the Fig. 3 shows a further embodiment of a heating arrangement 20 with a first heating circuit 21 and a second heating circuit 22.
  • the respective threads for fixing the heating circuits 21, 22 are not shown for reasons of clarity. It can be seen here that the heating circuit 21 is laid less closely in a central area 23 of the heating arrangement 20 than the heating circuit 22 in an edge area 24 of the heating arrangement 20.
  • the heating circuits 21, 22 are arranged essentially in a meandering manner on the carrier 25.
  • the distance d between two sections or legs of a loop of the meandering heating circuit 21 is less than the distance e between two legs of a loop of the meandering heating circuit 22 can be as in the central area 23 of the heating arrangement 20.
  • the Figure 4a shows an example of the structuring of a surface of the outside of the front wall 2 of an infrared heater.
  • the structure is diamond-shaped.

Description

Die Erfindung betrifft eine Infrarotheizung mit einer Frontwand und einer Rückwand, zwischen denen eine Heizanordnung mit mindestens einem Heizkreis angeordnet ist, wobei der Heizkreis einen Heizleiter umfasst.The invention relates to an infrared heater with a front wall and a rear wall, between which a heating arrangement with at least one heating circuit is arranged, the heating circuit comprising a heating conductor.

Herkömmliche Heizkörper von Heizungen, die mit einem fossilen Brennstoff betrieben werden, funktionieren nach dem Konvektionsprinzip. Sie verfügen über eine große Oberfläche und erwärmen die Luft, die daran vorbeizieht. Dabei kommt es zu Verwirbelungen, die Staub im ganzen Raum verteilen.Conventional radiators for heating systems that run on fossil fuels work according to the convection principle. They have a large surface area and heat the air that passes by them. This creates turbulence that distributes dust throughout the room.

Eine Infrarotheizung erwärmt die Luft dagegen kaum. Sie strahlt ihre Energie direkt auf Personen und Objekte im Wohnraum. Dieser effiziente Übertragungsweg sorgt dafür, dass Infrarotheizungen sowohl gegenüber anderen Heizarten mit Strom als auch im Vergleich mit Zentralheizungen auf Basis fossiler Energieträger in Sachen Kosten und Wirtschaftlichkeit überlegen sind.Infrared heating, on the other hand, hardly warms the air. It radiates its energy directly onto people and objects in the living space. This efficient transmission path ensures that infrared heaters are superior to other types of heating with electricity as well as to central heating systems based on fossil fuels in terms of cost and economy.

Die US 3,453,413 A offenbart ein Heizelement mit einer rauen Oberfläche.The U.S. 3,453,413 A discloses a heating element with a rough surface.

Die US 4,990,747 A offenbart eine keramische Heizplatte, die an ihrer Oberseite eine Keramikschicht mit Partikeln aufweist.The U.S. 4,990,747 A discloses a ceramic heating plate which has a ceramic layer with particles on its upper side.

Die US 2,579,964 A offenbart ein Heizelement, welches mit einer textilen Hülle überzogen ist.The U.S. 2,579,964 A discloses a heating element which is covered with a textile cover.

Aus der US 5,138,134 A ist ein Heizelement bekannt, dessen Außenseite bemalt ist.From the U.S. 5,138,134 A a heating element is known, the outside of which is painted.

Die DE 20 2006 017 490 U1 offenbart eine Infrarotkeramikstandheizung.The DE 20 2006 017 490 U1 discloses an infrared ceramic heater.

Aus der DE 20 2009 015 662 U1 ist eine Infrarotflächenheizung bekannt, deren sichtbare Oberfläche Salzkristallelemente aufweist.From the DE 20 2009 015 662 U1 an infrared panel heater is known, the visible surface of which has salt crystal elements.

Aus der EP 1 333 702 A2 ist eine Heizmatte bekannt, bei der der Heizleiter bifilar verlegt ist.From the EP 1 333 702 A2 a heating mat is known in which the heating conductor is laid bifilar.

Die DE 10 2009 032 260 A1 offenbart eine Infrarotheizeinrichtung, bei der ein Heizleiter in ein textiles Material eingewebt sein kann.The DE 10 2009 032 260 A1 discloses an infrared heating device in which a heating conductor can be woven into a textile material.

Die DE 20 2006 007 228 U1 offenbar ein Infrarotflächenheizelement, bei dem ein Spezialglas mit einer Nanokeramik beschichtet ist.The DE 20 2006 007 228 U1 apparently an infrared surface heating element in which a special glass is coated with a nanoceramic.

Aufgabe der vorliegenden Erfindung ist es, eine Infrarotheizung vorzuschlagen, die noch effizienter ist.The object of the present invention is to propose an infrared heater that is even more efficient.

Gelöst wird diese Aufgabe erfindungsgemäß durch eine Infrarotheizung mit einer Frontwand und einer Rückwand, zwischen denen eine Heizanordnung mit mindestens einem Heizkreis angeordnet ist, wobei der Heizkreis einen Heizleiter umfasst und wobei die Frontwand an der Oberfläche ihrer Außenseite strukturiert ist, wobei die Frontwand selbst durch eine mechanische Bearbeitung und unter einer gegebenenfalls vorhandenen Beschichtung strukturiert ist.This object is achieved according to the invention by an infrared heater with a front wall and a rear wall, between which a heating arrangement with at least one heating circuit is arranged, wherein the heating circuit comprises a heating conductor and the front wall is structured on the surface of its outside, the front wall itself by a mechanical processing and is structured under an optionally present coating.

Die Strukturierung weist vorzugsweise mindestens eine Höhe von 0,5 mm auf. Maximal sollte die Strukturierung eine Höhe von etwa 10 mm aufweisen.The structuring preferably has a height of at least 0.5 mm. The structure should have a maximum height of about 10 mm.

Weist die Frontwand eine glatte Oberfläche an der Außenseite auf, so geht ein Großteil der Wärmeleistung nach oben. Wird dagegen die Frontwand strukturiert, so wird dies unterbunden und es entsteht eine höhere Abstrahlleistung aufgrund einer Vergrößerung der Oberfläche der Frontwand durch die Strukturierung. Die Frontwand kann beispielsweise nach Art einer Leder- oder Hautstruktur strukturiert sein. Weitere Strukturierungsbeispiele sind eine Karoform, die Nachbildung einer Leinenstruktur oder einer Rautenstruktur oder halbkugelförmige Ausnehmungen.If the front wall has a smooth surface on the outside, most of the heat output goes up. If, on the other hand, the front wall is structured, this is suppressed and a higher radiation power arises due to an enlargement of the surface of the front wall due to the structuring. The front wall can for example be structured in the manner of a leather or skin structure. Further structuring examples are a diamond shape, the reproduction of a linen structure or a diamond structure or hemispherical recesses.

Die Frontwand kann zumindest an ihrer Außenseite keramisch beschichtet sein. Auch durch diese Maßnahme kann die Abstrahlleistung der Infrarotheizung verbessert werden. Beispielsweise kann die Frontwand mit einem keramischen Pulver beschichtet sein. Durch eine solche Beschichtung verbessert sich auch die Wärmebeständigkeit der Frontwand. Insbesondere können Farbvariationen aufgrund großer Erwärmung der Frontwand auf diese Art und Weise vermieden werden. Die Beschichtung ist vorzugsweise so dünn, dass die Strukturierung der Oberseite der Frontwand erhalten bleibt.The front wall can be ceramic coated at least on its outside. This measure can also improve the radiation output of the infrared heater. For example, the front wall can be coated with a ceramic powder. Such a coating also improves the heat resistance of the front wall. In particular, color variations due to great heating of the front wall can be avoided in this way. The coating is preferably so thin that the structure of the top of the front wall is retained.

Die Frontwand kann aus einem Stahlblech ausgebildet sein. Wenn statt des herkömmlichen Aluminiums ein Stahlblech verwendet wird, kann ein schnelleres Aufheizen der Frontwand erfolgen. Außerdem kann die Dicke der Frontwand reduziert werden. Es kann eine schnellere Wärmeabgabe nach außen erfolgen. Die Innentemperatur der Infrarotheizung kann dadurch reduziert werden. Die Frontwand kann dabei eine Dicke im Bereich von 0,5 bis 1,5 mm aufweisen, vorzugsweise liegt die Dicke im Bereich von 0,75 bis 1 mm.The front wall can be formed from a steel sheet. If a steel sheet is used instead of conventional aluminum, the front wall can heat up more quickly. In addition, the thickness of the front wall can be reduced. A faster heat release to the outside can take place. This can reduce the internal temperature of the infrared heater. The front wall can have a thickness in the range from 0.5 to 1.5 mm, preferably the thickness is in the range from 0.75 to 1 mm.

Ein Stahlblech kann auch relativ einfach strukturiert werden. Durch die Strukturierung der Vorderseite der Frontwand wird auch noch die Stabilität der Frontwand erhöht, was wiederum dazu führt, dass die Dicke der aus Stahlblech ausgebildeten Frontwand reduziert werden kann.A steel sheet can also be structured relatively easily. The structuring of the front side of the front wall also increases the stability of the front wall, which in turn means that the thickness of the front wall made of sheet steel can be reduced.

Die Rückwand der Infrarotheizung kann aus Stahlblech ausgebildet sein, insbesondere aus Chromstahlblech. Die Rückwand kann hochglanzpoliert oder marmoriert sein. Die Rückwand zu marmorieren hat den Vorteil, dass Fingerabdrücke praktisch nicht zu sehen sind. Sowohl die Ausführung der Rückwand als hochglanzpolierte Rückwand als auch als marmorierte Rückwand führt dazu, dass nur eine geringe Wärmeabgabe nach hinten erfolgt.The rear wall of the infrared heater can be made from sheet steel, in particular from chrome steel sheet. The back wall can be polished or marbled. Marbling the back wall has the advantage that fingerprints are practically invisible. Both the design of the rear wall as a highly polished rear wall and as a marbled rear wall means that only a small amount of heat is given off to the rear.

Zwischen der Heizanordnung und der Rückwand kann eine Isolierung vorgesehen sein, was dazu führt, dass wenig Wärme nach hinten abgestrahlt wird und ein Großteil der Wärme der Infrarotheizung nach vorn über die Frontwand abgegeben wird.Insulation can be provided between the heating arrangement and the rear wall, which means that little heat is radiated to the rear and a large part of the heat from the infrared heater is given off to the front via the front wall.

Die Effektivität der Infrarotheizung kann weiterhin dadurch verbessert werden, dass zwischen der Heizanordnung und der Rückwand eine reflektierende Schicht oder Beschichtung vorgesehen ist.The effectiveness of the infrared heating can be further improved in that a reflective layer or coating is provided between the heating arrangement and the rear wall.

Die Herstellung der Infrarotheizung gestaltet sich besonders einfach, wenn die Front- und Rückwand miteinander verklebt und/oder verrastet sind.The manufacture of the infrared heater is particularly simple when the front and rear walls are glued and / or locked together.

Der Heizleiter des Heizkreises kann zumindest abschnittsweise bifilar verlaufen. Dies bedeutet, dass der Strom, insbesondere Wechselstrom, der im Heizleiter geführt ist, in den Leiterabschnitten der bifilaren Abschnitte in entgegengesetzten Richtungen fließt, sodass sich die durch den Strom entstehenden elektromagnetischen Felder der beiden Leiterabschnitte gegenseitig weitestgehend kompensieren. Die elektromagnetische Verträglichkeit einer solchen Infrarotheizung ist daher deutlich verbessert.The heating conductor of the heating circuit can run bifilar at least in sections. This means that the current, in particular alternating current, which is carried in the heating conductor, flows in opposite directions in the conductor sections of the bifilar sections, so that the electromagnetic fields of the two conductor sections generated by the current largely compensate each other. The electromagnetic compatibility of such an infrared heater is therefore significantly improved.

Insbesondere kann der Heizleiter des Heizkreises mit seiner ersten Hälfte bis zu einem Wendepunkt verlaufen und anschließend kann die zweite Hälfte des Heizleiters parallel zur ersten Hälfte geführt werden, insbesondere in einem geringen Abstand zur ersten Hälfte des Leiters geführt werden. Dies bedeutet, dass zumindest in einem Abschnitt des Heizkreises ein Teil der ersten Hälfte des Heizleiters parallel zu einem Teil der zweiten Hälfte des Heizleiters verläuft. Die Anschlüsse des Heizleiters können dabei ebenfalls nah beieinanderliegen, also in einem geringen Abstand voneinander angeordnet sein. Dies erleichtert auch den elektrischen Anschluss des Heizleiters.In particular, the first half of the heating conductor of the heating circuit can run to a turning point and then the second half of the heating conductor can be guided parallel to the first half, in particular at a small distance from the first half of the conductor. This means that, at least in a section of the heating circuit, part of the first half of the heating conductor runs parallel to part of the second half of the heating conductor. The connections of the heating conductor can also be close to one another, that is, they can be arranged at a small distance from one another. This also facilitates the electrical connection of the heating conductor.

Insbesondere kann der Heizleiter des Heizkreises über mindestens 80 % seiner Länge bifilar geführt sein. Durch diese Maßnahme kann sichergestellt werden, dass elektromagnetische Felder weitestgehend kompensiert werden.In particular, the heating conductor of the heating circuit can be bifilar over at least 80% of its length. This measure can ensure that electromagnetic fields are largely compensated.

Besondere Vorteile ergeben sich, wenn der Heizkreis mittels eines Fadens auf einem Träger befestigt ist. Durch den Faden wird der Heizkreis sicher an dem Träger gehalten. Dennoch kann sich der Heizkreis bzw. der Heizleiter zwischen Faden und Träger noch geringfügig bewegen. Insbesondere kann sich der Heizleiter bei Erwärmung ausdehnen und wieder zusammenziehen. Durch diese Art der Befestigung wird also eine gewisse Beweglichkeit und Dehnfähigkeit des Heizleiters beibehalten, was zu einer erhöhten Lebensdauer des Heizleiters beiträgt.Particular advantages result if the heating circuit is attached to a carrier by means of a thread. The heating circuit is held securely on the carrier by the thread. Nevertheless, the heating circuit or the Move the heating conductor slightly between the thread and the carrier. In particular, the heating conductor can expand and contract again when heated. With this type of attachment, a certain mobility and elasticity of the heating conductor is maintained, which contributes to an increased service life of the heating conductor.

Der Träger kann aus einem flexiblen Material ausgebildet sein. Dies erleichtert es, den Heizkreis mit dem Träger mittels des Fadens zu vernähen. Der flexible Träger kann insbesondere begrenzt dehnbar sein. Dadurch ist es auch möglich, dass der Träger den temperaturbedingten Bewegungen des Heizleiters folgt. Beispielsweise kann der Träger als Polyestergewebe, Glasgewebe oder Glas-Silikon-Gewebe ausgebildet sein. Der Träger kann im Bereich von 10 % bis 20 % dehnbar sein.The carrier can be formed from a flexible material. This makes it easier to sew the heating circuit to the carrier by means of the thread. The flexible carrier can in particular be stretchable to a limited extent. This also makes it possible for the carrier to follow the temperature-dependent movements of the heating conductor. For example, the carrier can be designed as a polyester fabric, glass fabric or glass-silicone fabric. The carrier can be stretchable in the range of 10% to 20%.

Der Heizkreis kann mäanderförmig ausgebildet sein, insbesondere mäanderförmig auf dem Träger angeordnet sein. Dadurch kann die Effektivität der Infrarotheizung gesteigert werden, da ein längerer Heizkreis verlegt werden kann.The heating circuit can be designed in a meandering shape, in particular arranged in a meandering shape on the carrier. This can increase the effectiveness of the infrared heating, as a longer heating circuit can be laid.

In einem Randbereich der Heizanordnung kann ein oder der Heizkreis enger verlegt sein als ein anderer oder der Heizkreis in einem zentralen Bereich der Heizanordnung. Dies kann bedeuten, dass der Abstand zwischen Abschnitten des Heizkreises in einem zentralen Bereich der Heizanordnung größer ist als in einem Randbereich. Bei einer mäanderförmigen Anordnung des Heizkreises auf dem Träger können die Schleifen der mäanderförmigen Gestalt enger verlegt werden. Insbesondere können Schenkel einer Schleife des mäanderförmig verlegten Heizkreises einen geringeren Abstand aufweisen, wenn der Heizkreis in einem Randbereich verlegt ist, im Vergleich zu einem Heizkreis oder Abschnitt des Heizkreises, der in einem zentralen Bereich der Heizanordnung verlegt ist. Auf diese Art und Weise kann sichergestellt werden, dass auch im Randbereich eine ähnliche Heizleistung erzeugt wird wie im zentralen Bereich der Heizanordnung.In an edge area of the heating arrangement, one or the heating circuit can be laid closer than another or the heating circuit in a central area of the heating arrangement. This can mean that the distance between sections of the heating circuit is greater in a central area of the heating arrangement than in an edge area. With a meandering arrangement of the heating circuit on the carrier, the loops of the meandering shape can be laid closer. In particular, legs of a loop of the meandering heating circuit can have a smaller spacing when the heating circuit is laid in an edge area compared to a heating circuit or section of the heating circuit that is laid in a central area of the heating arrangement. In this way it can be ensured that a similar heating power is generated in the edge area as in the central area of the heating arrangement.

Alternativ oder zusätzlich kann vorgesehen sein, dass in einem Randbereich der Heizanordnung ein Heizleiter oder Heizleiterabschnitt mit einem geringeren elektrischen Widerstand angeordnet ist als in einem zentralen Bereich der Heizanordnung. Ein Heizleiter mit geringerem Widerstand wird bei gleichem Strom wärmer, sodass auch auf diese Art und Weise dafür gesorgt werden kann, dass im Randbereich der Heizanordnung eine ähnliche Heizleistung erzeugt werden kann wie im zentralen Bereich der Heizanordnung. Der elektrische Widerstand kann durch die Materialwahl des Heizleiters beeinflusst werden. Alternativ oder zusätzlich kann der Durchmesser des Heizleiters variiert werden. Um den Widerstand zu verringern, kann ein größerer Querschnitt, insbesondere Durchmesser, des Heizleiters verwendet werden.Alternatively or additionally, it can be provided that a heating conductor or heating conductor section with a lower electrical resistance is arranged in an edge region of the heating arrangement than in a central region of the heating arrangement. A heating conductor with a lower resistance becomes warmer with the same current, so that it can also be ensured in this way that a similar heating power can be generated in the edge area of the heating arrangement as in the central area of the heating arrangement. The electrical resistance can be influenced by the choice of material for the heating conductor. Alternatively or additionally, the diameter of the heating conductor can be varied. In order to reduce the resistance, a larger cross section, in particular diameter, of the heating conductor can be used.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, anhand der Figuren der Zeichnung, die erfindungswesentliche Einzelheiten zeigt, sowie aus den Ansprüchen. Die dort gezeigten Merkmale sind nicht notwendig maßstäblich zu verstehen und derart dargestellt, dass die erfindungsgemäßen Besonderheiten deutlich sichtbar gemacht werden können. Die verschiedenen Merkmale können je einzeln für sich oder zu mehreren in beliebigen Kombinationen bei Varianten der Erfindung verwirklicht sein.Further features and advantages of the invention emerge from the following description of exemplary embodiments of the invention, with reference to the figures of the drawing, which shows details essential to the invention, and from the claims. The features shown there are not necessarily to be understood in terms of scale and are shown in such a way that the special features according to the invention can be made clearly visible. The various features can each be implemented individually or collectively in any combination in variants of the invention.

In der schematischen Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt und in der nachfolgenden Beschreibung näher erläutert.In the schematic drawing, exemplary embodiments of the invention are shown and explained in more detail in the following description.

Es zeigen:

Fig. 1
eine Schnittdarstellung durch eine Infrarotheizung;
Fig. 2
eine erste Ausführungsform einer Heizanordnung;
Fig. 3
eine zweite Ausführungsform einer Heizanordnung;
Fig. 4a bis 4d
unterschiedliche Ausführungsformen von Strukturierungen einer Frontwand.
Show it:
Fig. 1
a sectional view through an infrared heater;
Fig. 2
a first embodiment of a heating arrangement;
Fig. 3
a second embodiment of a heating arrangement;
Figures 4a to 4d
different embodiments of structuring a front wall.

Die Fig. 1 zeigt eine Infrarotheizung 1 in einer Schnittdarstellung. Die Infrarotheizung 1 weist eine Frontwand 2 und eine Rückwand 3 auf. Die Frontwand 2 und die Rückwand 3 sind an der Stelle 4 miteinander verklipst. An der Stelle 5 sind sie miteinander verklebt. Zwischen der Frontwand 2 und der Rückwand 3 ist eine Heizanordnung 6, die noch näher beschrieben werden wird, angeordnet. In Richtung Rückwand 3 ist hinter der Heizanordnung 6 zunächst eine reflektierende Schicht 7 und dann eine Isolierung 8 vorgesehen. Dadurch soll möglichst vermieden werden, dass Wärmestrahlung nach hinten abgegeben wird. Die Frontwand 2 ist vorzugsweise aus Stahlblech ausgebildet und an ihrer Außenseite 9, d. h. an der Seite, an der Wärme abgestrahlt werden soll, strukturiert.The Fig. 1 shows an infrared heater 1 in a sectional view. The infrared heater 1 has a front wall 2 and a rear wall 3. The front wall 2 and the rear wall 3 are clipped together at point 4. At point 5 they are glued together. A heating arrangement 6, which will be described in more detail below, is arranged between the front wall 2 and the rear wall 3. In the direction of the rear wall 3, a reflective layer 7 and then insulation 8 is provided behind the heating arrangement 6. This is to avoid that heat radiation is given off to the rear. The front wall 2 is preferably made of sheet steel and structured on its outside 9, that is to say on the side from which heat is to be radiated.

Die Fig. 2 zeigt die Heizanordnung 6. Sie umfasst einen Träger 10, der aus flexiblem Material ausgebildet sein kann. Das Material kann eine gewisse Dehnbarkeit aufweisen. Auf dem Träger 10 ist ein Heizkreis 11 fixiert. Der Heizkreis 11 umfasst einen Heizleiter 12, wobei die erste Hälfte 12.1 des Heizleiters 12 in engem Abstand zur zweiten Hälfte 12.2 geführt ist. Der Heizleiter 12 verläuft demnach bifilar. Ein in der ersten Hälfte 12.1 in Pfeilrichtung 13 verlaufender Strom verläuft in der zweiten Hälfte 12.2 in Pfeilrichtung 14, also gerade in entgegengesetzter Richtung. Die durch den Strom verursachten elektromagnetischen Felder sind somit gegensinnig und heben sich im Wesentlichen auf.The Fig. 2 shows the heating arrangement 6. It comprises a carrier 10 which can be formed from flexible material. The material can have a certain elasticity. A heating circuit 11 is fixed on the carrier 10. The heating circuit 11 comprises a heating conductor 12, the first half 12.1 of the heating conductor 12 being guided at a close distance from the second half 12.2. The heating conductor 12 accordingly runs bifilar. A current running in the direction of the arrow 13 in the first half 12.1 runs in the second half 12.2 in the direction of the arrow 14, that is to say in the opposite direction. By The electromagnetic fields caused by the current are therefore in opposite directions and essentially cancel each other out.

Der Heizkreis 11 ist mit einem Faden 15 mit dem Träger 10 vernäht. Dadurch, dass der Faden 15 den Heizkreis 11 lediglich überspannt, ist es möglich, dass sich der Heizleiter 12 unterhalb des Fadens 15 ausdehnt und zusammenzieht. Dadurch wird die mechanische Beanspruchung des Heizleiters 12 gering gehalten. Weiterhin ist zu erkennen, dass die Anschlüsse 16, 17 des Heizleiters 12 in geringem Abstand zueinander angeordnet sind.The heating circuit 11 is sewn to the carrier 10 with a thread 15. Because the thread 15 only spans the heating circuit 11, it is possible for the heating conductor 12 to expand and contract below the thread 15. As a result, the mechanical stress on the heating conductor 12 is kept low. It can also be seen that the connections 16, 17 of the heating conductor 12 are arranged at a small distance from one another.

Die Fig. 3 zeigt eine weitere Ausführungsform einer Heizanordnung 20 mit einem ersten Heizkreis 21 und einem zweiten Heizkreis 22. Die jeweiligen Fäden zur Fixierung der Heizkreise 21, 22 sind aus Übersichtlichkeitsgründen nicht dargestellt. Hier ist zu erkennen, dass der Heizkreis 21 in einem zentralen Bereich 23 der Heizanordnung 20 weniger eng verlegt ist als der Heizkreis 22 in einem Randbereich 24 der Heizanordnung 20.The Fig. 3 shows a further embodiment of a heating arrangement 20 with a first heating circuit 21 and a second heating circuit 22. The respective threads for fixing the heating circuits 21, 22 are not shown for reasons of clarity. It can be seen here that the heating circuit 21 is laid less closely in a central area 23 of the heating arrangement 20 than the heating circuit 22 in an edge area 24 of the heating arrangement 20.

Die Heizkreise 21, 22 sind im Wesentlichen mäanderförmig auf dem Träger 25 angeordnet. Der Abstand d zwischen zwei Abschnitten bzw. Schenkeln einer Schleife des mäanderförmig verlegten Heizkreises 21 ist geringer als der Abstand e zwischen zwei Schenkeln einer Schleife des mäanderförmig verlegten Heizkreises 22. Durch diese Maßnahme kann sichergestellt werden, dass im Randbereich 24 eine ähnliche Heizleistung und Erwärmung erzeugt werden kann wie im zentralen Bereich 23 der Heizanordnung 20.The heating circuits 21, 22 are arranged essentially in a meandering manner on the carrier 25. The distance d between two sections or legs of a loop of the meandering heating circuit 21 is less than the distance e between two legs of a loop of the meandering heating circuit 22 can be as in the central area 23 of the heating arrangement 20.

Die Fig. 4a zeigt beispielhaft eine Strukturierung einer Oberfläche der Außenseite der Frontwand 2 einer Infrarotheizung. In diesem Fall ist die Strukturierung karoförmig.The Figure 4a shows an example of the structuring of a surface of the outside of the front wall 2 of an infrared heater. In this case the structure is diamond-shaped.

In der Fig. 4b ist eine lederartige Strukturierung gezeigt.In the Figure 4b a leather-like structure is shown.

In der Fig. 4c ist eine gewebeartige Strukturierung gezeigt, insbesondere nach Art eines Leinengewebes.In the Figure 4c a fabric-like structure is shown, in particular in the manner of a linen fabric.

In der Fig. 4d ist eine rautenförmige Strukturierung der Oberfläche einer Frontwand gezeigt.In the Figure 4d a diamond-shaped structure of the surface of a front wall is shown.

Claims (12)

  1. Infrared heating system (1) having a front wall (2) and a rear wall (3), between which a heating assembly (6, 20) is arranged which has at least one heating circuit (11, 21, 22), the heating circuit (11, 21, 22) comprising a heat conductor (12), the surface of the outer face (9) of the front wall (2) being structured, characterized in that the front wall itself is structured by mechanical processing and beneath an optional coating.
  2. Infrared heating system according to claim 1, characterized in that at least the outer face (9) of the front wall (2) is ceramic coated.
  3. Infrared heating system according to either of the preceding claims, characterized in that the front wall (2) is formed from sheet steel.
  4. Infrared heating system according to any of the preceding claims, characterized in that a reflective layer (7) or coating is provided between the heating assembly (6, 20) and the rear wall (3).
  5. Infrared heating system according to any of the preceding claims, characterized in that the front and rear walls (2, 3) are adhesively bonded and/or locked to one another.
  6. Infrared heating system according to any of the preceding claims, characterized in that at least portions of the heat conductor (12) of the heating circuit (11, 21, 22) extend in a bifilar manner.
  7. Infrared heating system according to claim 6, characterized in that the heat conductor (12) of the heating circuit (11, 21, 22) is bifilar over at least 80% of the length thereof.
  8. Infrared heating system according to any of the preceding claims, characterized in that the heating circuit (11, 21, 22) is fastened to a carrier (10, 25) by means of a thread (15).
  9. Infrared heating system according to claim 8, characterized in that the carrier (10, 25) is formed from a flexible material.
  10. Infrared heating system according to any of the preceding claims, characterized in that the heating circuit (11, 21, 22) has a meandering shape.
  11. Infrared heating system according to any of the preceding claims, characterized in that a or the heating circuit (22) is laid closer in an edge region (24) of the heating assembly (20) than another or the heating circuit (21) in a central region (23) of the heating assembly (20).
  12. Infrared heating system according to any of the preceding claims, characterized in that a heat conductor or heat conductor portion is arranged in an edge region (24) of the heating assembly (20), which heat conductor or heat conductor portion has a lower electrical resistance than in a central region (23) of the heating assembly (20).
EP18162696.1A 2017-06-02 2018-03-20 Infrared heating with structured front wall Active EP3410820B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017112206.0A DE102017112206A1 (en) 2017-06-02 2017-06-02 Infrared heating with structured front wall

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EP3410820A1 EP3410820A1 (en) 2018-12-05
EP3410820B1 true EP3410820B1 (en) 2020-10-21

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DE (1) DE102017112206A1 (en)

Cited By (1)

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DE202024100463U1 (en) 2023-01-10 2024-02-28 Elisabeth Tronecker Heating device for producing and operating a heating device

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US5138134A (en) * 1984-02-10 1992-08-11 Ellison Mearl E Decorative wall hanging heater
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AT5812U1 (en) * 2002-01-31 2002-12-27 Regina Schlafkomfort Gmbh HEATING MAT WITH AN ELECTRIC RESISTANT HEATING
DE202006007228U1 (en) * 2006-05-03 2006-10-26 Beier, Gerhard M., Dipl.-Ing. Manufacturing a flat surface infrared heating element has a sandwich of a carbon fibre electrical heating mat and a special glass coated with a nano-ceramic sheet
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DE202024100463U1 (en) 2023-01-10 2024-02-28 Elisabeth Tronecker Heating device for producing and operating a heating device

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DE102017112206A1 (en) 2018-12-06

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