EP4058730B1 - Infrarotstrahlungs-emitter - Google Patents

Infrarotstrahlungs-emitter Download PDF

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Publication number
EP4058730B1
EP4058730B1 EP20800666.8A EP20800666A EP4058730B1 EP 4058730 B1 EP4058730 B1 EP 4058730B1 EP 20800666 A EP20800666 A EP 20800666A EP 4058730 B1 EP4058730 B1 EP 4058730B1
Authority
EP
European Patent Office
Prior art keywords
screen
burner plate
emitter
combustion surface
burner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20800666.8A
Other languages
English (en)
French (fr)
Other versions
EP4058730A1 (de
EP4058730C0 (de
Inventor
James FARINHA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solaronics SAS
Original Assignee
Solaronics SAS
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Filing date
Publication date
Application filed by Solaronics SAS filed Critical Solaronics SAS
Publication of EP4058730A1 publication Critical patent/EP4058730A1/de
Application granted granted Critical
Publication of EP4058730B1 publication Critical patent/EP4058730B1/de
Publication of EP4058730C0 publication Critical patent/EP4058730C0/de
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/148—Radiant burners using screens or perforated plates with grids, e.g. strips or rods, as radiation intensifying means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/042—Stoves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/10—Burner material specifications ceramic

Definitions

  • a mesh material to form the screen of a gas-heated infrared radiation emitter.
  • Such mesh materials can be referred to as lattice structure materials, or even as lattice structure materials.
  • Such materials have in particular a geometric spatial organization.
  • the structure of such materials corresponds to the repetition, in the three directions of space, of the same elementary geometric pattern (mesh or cell), preferably in three dimensions.
  • such materials may have a structure forming the edges of patterns (or meshes or cells) repeated in a three-dimensional network.
  • Such mesh materials have recently proven to be of interest for replacing traditional screens for infrared radiation emitters, particularly due to their efficiency.
  • An infrared radiation emitter comprising such a mesh material as a screen is particularly described in the document WO 2017/156440 .
  • the document WO 2012/084561 relates to a gas-fired infrared radiant emitter comprising a burner plate acting as a combustion surface and a radiant shield positioned on the combustion side of the burner plate.
  • the radiant shield is embossed, thereby establishing locally different distances between the burner plate and the radiant shield.
  • US 2014/116424 And JP 2002/267115 disclose other gas-heated infrared radiation emitters.
  • a gas-fired infrared radiation emitter comprising a burner plate, said burner plate serving as a combustion surface, and a radiant screen positioned on the combustion surface side of said burner plate.
  • Said radiant screen is formed by a mesh or open-pore material, and has an inner face oriented on the combustion surface side of the burner plate.
  • the inner surface of the screen comprises at least a first portion and a second portion offset from each other relative to the combustion surface, such that the distance between the combustion surface and the first portion is less than the distance between the combustion surface and the second portion.
  • the transmitter according to the present invention thus makes it possible to improve the operating stability of the transmitter, in particular during ignition, thanks to the second portion of the internal surface of the screen which is located at a distance from the burner plate, while maintaining a higher infrared radiation efficiency than that of transmitters with a traditional screen, thanks to the first portion of the internal surface of the screen which remains in the immediate vicinity of the burner plate.
  • the applicant has found that it is sufficient to keep a distance between the screen made of mesh material and the burner plate, only on a portion of the internal surface of the screen, to maintain the flame on the burner plate.
  • the transmitter according to the present invention it becomes possible to obtain a zone of the burner plate at which the flame remains attached and can relight the flame on the rest of the plate if the latter were to go out.
  • the burner plate area located opposite the second portion of the screen also fulfills a pilot light function for the transmitter, allowing it to be completely relighted when it partially goes out.
  • the difference in distance between the combustion surface and the first and second portions is between 0.5mm and 10mm, preferably between 1mm and 5mm.
  • Such distances allow both to maintain the flame of the transmitter, in particular during ignition, while presenting a high efficiency.
  • the screen also has an external face opposite the internal face, the external face being substantially flat and parallel to the two offset portions of the internal face so that the thickness of the screen at the first portion is greater than the thickness of the screen at the second portion.
  • the internal face of the screen is formed by the absence or removal, at the level of the second portion, of one or more meshes.
  • the screen made of mesh material comprising a structure resulting from the repetition, in the three directions of space, of the same elementary geometric pattern, it suffices, in order to obtain the second portion of internal surface located set back from the first portion of internal surface, to delete or remove one or more elementary patterns from the structure of the mesh material, for example a layer of several elementary patterns on the side, the layer having a thickness of between 1 and 5 elementary patterns.
  • the second portion of the screen is arranged substantially opposite the center of the burner plate, for example opposite the center of a ceramic plate, preferably perforated.
  • the second portion of the screen is provided to be located opposite the hottest area of the burner plate. This is because the hottest areas of the burner plates may be subject to deterioration first, so that by providing the second portion of the screen opposite such normally hotter areas of the burner plate, it becomes possible to limit the temperature thereof and thus increase the service life thereof.
  • the transmitter comprises two burner plates mounted side by side, for example two ceramic plates, preferably perforated, and the screen comprises two second portions located substantially opposite the center of each of the burner plates.
  • the second portions of screen are provided opposite the hottest areas, that is to say opposite the center of each of the burner plates, in order to increase the life of the transmitter.
  • the second portion of the screen is disposed facing a peripheral portion of the burner plate, or each of the burner plates, for example on a peripheral portion of the inner surface of the screen such as a corner or along an edge of the inner surface of the screen.
  • the screen forms edges of a plurality of geometric meshes assembled into a three-dimensional network.
  • the screen forms a network of cubic meshes.
  • the screen comprises silicon carbide, preferably infiltrated with silicon.
  • Silicon carbide provides good high temperature resistance while maintaining, unlike many ceramics, high thermal conductivity. This therefore provides a screen temperature that is uniform, but also avoids hot spots at the combustion support.
  • the first portion and the second portion are substantially flat and parallel to each other.
  • substantially flat portions allows for better control of the behavior of the flame at each of said portions.
  • the screen is distant from the burner plate, for example at least 1 mm, and preferably at least 2 mm.
  • FIG. 1 represents a gas-heated infrared radiation emitter 1, comprising a screen 2 according to the prior art, for example in the form of a metal grid or braided metal wires.
  • the transmitter 1 comprises a frame 4 with a supply inlet 6 for the gases to be burned, and a burner plate 8 arranged opposite the internal surface of the screen 2.
  • the frame 4 and the burner plate 8 delimit an internal chamber into which the gases entering through the supply inlet 6 are conveyed.
  • the burner plate 8 may be, for example, a perforated ceramic plate whose perforations are intended to allow the gases present in the inner chamber of the emitter 1 to escape. On exiting the perforations, the gases are then burned on the external surface 10, or combustion surface, of the burner plate 8 when there is a flame, and then heat the screen 2 arranged opposite the external surface 10.
  • the burner plate 8 may comprise a notched or grooved external surface 10.
  • the burner plate 8 may have, at the external surface 10, different levels of combustion surface, for example two.
  • the external surface 10 may for example comprise parallel grooves arranged obliquely over the entire surface of the burner plate 8.
  • Such burner plates 8 with several levels of combustion surface are described in particular in the document WO 2010/003904 .
  • FIG. 2 schematically illustrates the general form of a screen according to the present invention.
  • the screen is formed of a mesh or open-pore material, and may comprise silicon carbide, preferably infiltrated with silicon.
  • the screen may be formed of a material having a structure resulting from the repetition, in the three directions of space, of the same elementary geometric pattern, as illustrated schematically in the Figures 3 to 6 , or may be formed from a foamed material.
  • a screen made of mesh material is notably described in the document WO 2017/156440 .
  • the screen 12 does not have a flat internal surface, but on the contrary comprises an internal surface 14 with a first main portion 16 and at least one second portion 18 arranged set back relative to the first portion 16.
  • the screen 12 thus comprises two second portions 18.
  • the second portions 18 are flat, like the first portion 16, and are parallel to the first portion 16.
  • Such a difference in thickness may correspond to a multiple of the thickness of an elementary geometric element of the mesh material.
  • it may be sufficient not to form or to remove one or more layers of elementary geometric elements of the mesh material, in order to obtain second portions 18 with a flat surface parallel to the first portion 16.
  • FIG 4 represents an infrared radiation transmitter 1 comprising a screen 12 as illustrated in Figures 2 and 3 .
  • the transmitter 1 comprises in particular a frame 4 and a combustion surface.
  • the combustion surface of the emitter 1 is formed by two burner plates 8a, 8b arranged adjacently to form a continuous combustion surface.
  • the screen 12 is arranged opposite the burner plates 8a, 8b, with the internal surface 14 facing the combustion surface.
  • the screen 12 is not arranged directly on the burner plates 8a, 8b, but at a distance, for example the first portion 16 can be located at least 1 mm from the burner plates 8a, 8b, preferably at least 2 mm. Indeed, the proximity of the screen 12 can lead, in use, to “detaching” the flame from the combustion surface and therefore to extinguishing the emitter 1, in particular during ignition.
  • the screen 12 comprises the second portions 18 which, as they are arranged set back from the first portion 16, are even further away from the burner plates 8a, 8b. It then becomes easier and simpler to maintain the flame on the combustion surface at least at the level of the second portions 18.
  • the flame goes out from the combustion surface located opposite the first portion 16 of the screen, it can be rekindled by the flame still present on the combustion surface located opposite the first portion 16 of the screen. with regard to the second portion 18.
  • the second portion 18 therefore makes it possible to maintain the operation of the transmitter 1, in particular upon ignition.
  • the second portions 18 are provided with reduced dimensions.
  • the total surface area of the second portions 18 may be between 1% and 70% of the total surface area of the internal surface, preferably between 5% and 50% and more preferably between 10% and 30%.
  • the second portions 18 may be provided facing the hottest surface of the burner plates 8a, 8b, i.e. facing the center of the burner plates 8a, 8b.
  • the hottest surfaces of the burner plates are the surfaces that deteriorate most quickly and that are most likely, over time, to prevent the proper operation of the transmitter.
  • the second portions 18 may be provided opposite a peripheral portion of the burner plates 8a, 8b, for example in a peripheral portion of the internal surface 14 of the screen.
  • THE figures 5 And 6 illustrate a second embodiment of the invention.
  • the transmitter comprises only one burner plate 8.
  • a second portion 18 is provided in the screen 12, and is arranged opposite the center of the burner plate 8.
  • the second portion 18 may also be arranged opposite a peripheral portion of the burner plate 8, for example on a peripheral portion of the internal surface of the screen such as a corner or an edge of the internal surface of the screen.
  • FIG 7 illustrates a third embodiment of the invention. More specifically, the figure 7 illustrates a screen whose surface intended to face the burner plate, i.e. the internal surface, is shown.
  • the screen 12' does not have a flat internal surface, but on the contrary comprises an internal surface 14 with a first main portion 16 and a second portion 18' arranged set back relative to the first portion 16.
  • the screen 12' thus comprises a single second portion 18'.
  • the second portion 18' is positioned on the periphery of the internal surface 14, in this case in a corner.
  • the surface of the second portion 18' is offset relative to the surface of the first portion 16, and is located below the surface of the first portion 16.
  • the screen 12' thus has a geometric shape in which the internal surface 14 has a hollow or recess on the periphery.
  • the screen 12' is illustrated with a single second portion 18' but can of course comprise several, arranged at the corners and/or edges of the internal surface 14.
  • the second portion 18' may be flat, like the first portion 16, and may be parallel to the first portion 16.
  • the specific shape of the screen according to the present invention it becomes possible to combine the efficiency of mesh or open-pore materials while maintaining the operating stability of traditional screen emitters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (8)

  1. Infrarotstrahlungssender (1), der mit Gas beheizt wird, umfassend eine Brennerplatte (8), wobei die Brennerplatte (8) als Verbrennungsfläche dient, und einen Strahlungsschirm (12), der auf der Seite der Verbrennungsfläche der Brennerplatte (8) positioniert ist, wobei der Strahlungsschirm (12) aus einem Material mit Maschen oder offenen Poren gebildet ist und eine Innenfläche (14) aufweist, die zu der Seite der Verbrennungsfläche der Brennerplatte (8) hin ausgerichtet ist, wobei die Innenfläche (14) des Schirms zumindest einen ersten Abschnitt (16) und einen zweiten Abschnitt (18) umfasst, die in Bezug auf die Verbrennungsfläche gegeneinander versetzt sind, sodass der Abstand zwischen der Verbrennungsfläche und dem ersten Abschnitt (16) kleiner als der Abstand zwischen der Verbrennungsfläche und dem zweiten Abschnitt (18) ist,
    dadurch gekennzeichnet, dass der Schirm (12) auch eine Außenfläche (20) gegenüber der Innenfläche (14) aufweist, wobei die Außenfläche (20) im Wesentlichen eben und parallel zu den zwei versetzten Abschnitten (16, 18) der Innenfläche (14) ist, sodass die Dicke des Schirms (12) auf Höhe des ersten Abschnittes (16) größer als die Dicke des Schirms (12) auf Höhe des zweiten Abschnittes (18) ist.
  2. Sender (1) nach dem vorhergehenden Anspruch, wobei der Unterschied des Abstands zwischen der Verbrennungsfläche und dem ersten und dem zweiten Abschnitt (16, 18) zwischen 0,5 mm und 10 mm, bevorzugt zwischen 1 mm und 5 mm umfasst.
  3. Sender (1) nach einem der vorhergehenden Ansprüche, wobei die Innenfläche (14) des Schirms durch das Nichtvorhandensein oder durch Rückzug auf Höhe des zweiten Abschnittes (18) von einer oder mehreren Maschen gebildet ist.
  4. Sender (1) nach einem der vorhergehenden Ansprüche, wobei der zweite Abschnitt (18) des Schirms im Wesentlichen in Bezug auf die Mitte der Brennerplatte (8) angeordnet ist, zum Beispiel in Bezug auf die Mitte einer Keramikplatte, bevorzugt perforiert.
  5. Sender (1) nach einem der Ansprüche 1 bis 3, wobei der zweite Abschnitt (18) des Schirms in Bezug auf einen peripheren Teil der Brennerplatte (8) angeordnet ist, zum Beispiel auf einem peripheren Teil der Innenfläche (14) des Schirms wie einer Ecke oder entlang einer Kante der Innenfläche (14) des Schirms.
  6. Sender (1) nach einem der vorhergehenden Ansprüche, wobei der Schirm (12) Ränder von mehreren geometrischen Maschen bildet, die in einem dreidimensionalen Netz angeordnet sind.
  7. Sender (1) nach einem der vorhergehenden Ansprüche, wobei der Schirm (12) Siliziumkarbid umfasst, bevorzugt infiltriert mit Silizium.
  8. Sender (1) nach einem der vorhergehenden Ansprüche, wobei der erste Abschnitt (16) des Schirms (12) entfernt von der Brennerplatte (8) ist, zum Beispiel mindestens 1 mm, und bevorzugt mindestens 2 mm.
EP20800666.8A 2019-11-15 2020-11-06 Infrarotstrahlungs-emitter Active EP4058730B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1912779A FR3103260B1 (fr) 2019-11-15 2019-11-15 Emetteur de rayonnement infra-rouge
PCT/EP2020/081356 WO2021094225A1 (fr) 2019-11-15 2020-11-06 Emetteur de rayonnement infra-rouge

Publications (3)

Publication Number Publication Date
EP4058730A1 EP4058730A1 (de) 2022-09-21
EP4058730B1 true EP4058730B1 (de) 2025-03-05
EP4058730C0 EP4058730C0 (de) 2025-03-05

Family

ID=69468881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20800666.8A Active EP4058730B1 (de) 2019-11-15 2020-11-06 Infrarotstrahlungs-emitter

Country Status (7)

Country Link
US (1) US12287090B2 (de)
EP (1) EP4058730B1 (de)
CN (1) CN114667416A (de)
BR (1) BR112022009379A2 (de)
ES (1) ES3021689T3 (de)
FR (1) FR3103260B1 (de)
WO (1) WO2021094225A1 (de)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58194320U (ja) * 1982-06-14 1983-12-24 リンナイ株式会社 ガス赤外線燃焼板
FR2534353A1 (fr) * 1982-10-11 1984-04-13 Vaneecke Solaronics Plaquette a face rayonnante alveolee pour bruleur radiant
SE468876B (sv) * 1991-07-08 1993-04-05 Staalhane Henrik Anordning vid gaseldad grill
JP2002267115A (ja) * 2001-03-06 2002-09-18 Nhk Spring Co Ltd 表面燃焼バーナ
US20080241776A1 (en) * 2007-03-28 2008-10-02 Constantin Burtea Infrared emitting gas burner
CN100516666C (zh) * 2007-05-22 2009-07-22 罗添翼 用在燃气具燃烧器上的有红外辐射功能的蜂窝发热体
BRPI0915469B1 (pt) * 2008-07-08 2020-04-22 Bekaert Sa Nv queimador radiante
TWI570362B (zh) * 2010-12-20 2017-02-11 索拉羅尼克斯股份有限公司 具有浮凸屏之氣體加熱輻射發射體
JP5857502B2 (ja) * 2011-07-27 2016-02-10 株式会社Ihi 燃焼加熱器
US20170261204A1 (en) 2016-03-10 2017-09-14 Selas Heat Technology Company Llc High intensity gas fired infrared emitter
US10539326B2 (en) * 2016-09-07 2020-01-21 Clearsign Combustion Corporation Duplex burner with velocity-compensated mesh and thickness
US11397288B2 (en) * 2017-01-24 2022-07-26 Solaronics S.A. Ceramic reflector for infrared lamps

Also Published As

Publication number Publication date
US12287090B2 (en) 2025-04-29
CN114667416A (zh) 2022-06-24
WO2021094225A1 (fr) 2021-05-20
FR3103260A1 (fr) 2021-05-21
EP4058730A1 (de) 2022-09-21
FR3103260B1 (fr) 2021-11-26
ES3021689T3 (en) 2025-05-27
BR112022009379A2 (pt) 2022-08-09
EP4058730C0 (de) 2025-03-05
US20220404014A1 (en) 2022-12-22

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