• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    L'invention concerne un dispositif avec une tête de brûleur (10), qui comprend une surface de matrice (12) avec une matrice d'orifices pour les gaz de combustion (14), et avec un module de commande (18) pour la command d'un brûleur comprenant la tête de brûleur (10). On propose que la brêleur (10) comprenne au moins un élément capteur de température (22) disposé dans la zone de la surface de la matrice (12) and que le module de commande (18) soit conçu de manière à actionner le brûleur and fonction des signaux de capteur de lélément capteur de température.
    公开号:BE1018370A6
    申请号:E2008/0695
    申请日:2008-12-23
    公开日:2010-09-07
    发明作者:Ludolf Guecker
    申请人:Viessmann Werke Kg；
    IPC主号:
    专利说明:

    The invention relates to a device with a burner head which comprises a die surface with a matrix of orifices for the combustion gases, and with a control module for controlling the burner head. a burner comprising the burner head. In addition, the invention relates to a method for operating a burner provided with such a burner head.
    DE 69 123 329 T2, for example, discloses a burner with a burner head, wherein the burner head comprises a die surface with a matrix of orifices for the combustion gases. A control module serves to control a burner including the burner head. It is stated in DE 69 123 329 T2 that the burner head may be equipped with thermocouples for testing purposes to test the burner head proposed in the document cited above, and not to control the operation of the burner.
    The invention particularly aims to improve the handling of the operation of a burner of the kind, or to provide a method that ensures the controlled operation of the burner.
    The invention is based in particular on a device provided with a burner head, which comprises a die surface with a matrix of orifices for the combustion gases, and a control module for controlling a burner comprising the head burner.
    It is proposed that the burner head comprises at least one temperature sensing element disposed in the area of the die surface, and that the control module is designed to actuate the burner according to the sensor signals of the sensor elements. temperature. Thus, it can be achieved that the control module obtains feedback on the temperature in the area of the burner head, so that the control module can draw conclusions about actual operating conditions and / or burner operating faults in order to take appropriate countermeasures. For example, the temperature can be set to a predetermined value and the burner dwell time can be improved.
    In this context, the "matrix" of orifices for the combustion gases is a distribution of the orifices for the combustion gases - whatever it may be - on the surface of the matrix. This notion is therefore not limited to a rectangular grid, and it is possible to envisage for example also symmetrical rotational distributions of the orifices for combustion gases with multiple symmetry and / or distributions with a variable density in the radial direction of the orifices for the combustion gas. It can further be provided that the orifices for the combustion gases have various sizes and / or shapes.
    The device according to the invention can use a portion of a gas burner or another burner to burn gaseous or gasifiable fuels, such as oil. The burner can also be operated with a mixture of several fuels, the different fuels can be introduced through the same orifices for the combustion gases or through different orifices.
    In an improvement of the invention, it is proposed that the surface of the matrix is designed in the form of a wire mesh. Thus, a matrix surface with a particularly low mass and a ratio between the area of the openings and the area occupied by the advantageously high material can be obtained. At the same time, a particularly large number of orifices for the combustion gases can be obtained for a low construction budget.
    When the temperature sensor element is designed as a thermocouple, a safe and reliable measurement of the temperature can also be guaranteed, even at high temperatures.
    In addition, it is proposed that the thermocouple be formed by an established contact between two son of the lattice which intersect, of different material.
    A thermocouple is a component made up of two different metals and connected together at one point. On the free ends of the two interconnected conductors, an electrical voltage is produced along the conductors on the basis of the Seebeck effect in the event of a temperature difference.
    In an exemplary embodiment of the invention particularly advantageous in terms of construction, it is proposed that the crossing son are brazed or welded. Thus, a well-defined contact between the two wires forming the thermocouple can be guaranteed. Thanks to the configuration according to the invention of the thermocouple constituted by the son of a lattice, it is possible to produce in a particularly simple manner a multitude of temperature sensing elements regularly distributed on the surface of the matrix.
    It is particularly advantageous that at least a portion of the yarns in a first direction in the yarn trellis is formed of another metal than at least a portion of the yarns in a second direction in the yarn trellis. The metals are chosen particularly advantageously so that the thermoelectric coefficients are particularly particularly distinguished. For applications in burners, it is particularly advantageous that at least a portion of the son going in one direction is formed of chromium nickel CrNi, the other part being advantageously made of nickel. The result is therefore a coupling of the type K thermocouple. In principle, platinum / platinum / rhodium wires which form an S type thermocouple coupling and which can be used for the measurement of temperatures up to about 1760 ° C.
    Particularly during use in the context of heating installations, it is advantageous that the control module is designed to use the sensor signals of the temperature sensing element to monitor a burner flame. Due to the low mass of the thermocouple according to the invention or at the disposal of the thermocouples according to the invention, these react very rapidly so that a quantity of fuel escaping until the control system responds can be significantly reduced compared to the configuration of the invention in which traditional thermocouples are used.
    In addition, it is proposed that the control module is designed to adjust the operation of the burner according to the sensor signals of the temperature sensor element. By adjustment is meant in this context operation with a closed control circuit, wherein the temperature sensing elements can produce the necessary feedback. For example, in an operating state, an adjustment can be made which ensures a constant burner temperature or a constant temperature of the die surface. If a multitude of temperature sensor elements are distributed over the surface of the matrix, the differences between the temperature sensor signals can be used additionally to homogenize the flame on the surface of the matrix or to homogenize the temperature of the burner. For this purpose, the fuel supply to the different zones of the combustion surface of the matrix can be selectively adjustable.
    In addition, it is proposed that the control module is designed to reduce the fuel supply of the burner when a sensor signal detected by the temperature sensor element exceeds a critical value. Thus, overheating protection can be achieved in a simple manner and damage to a sensitive matrix surface can be avoided under certain circumstances. Alternatively, it can trigger an emergency stop for example, when the temperatures detected by the temperature sensor elements are below a critical value that does not support a combustion lean in harmful substances for example.
    In addition, the invention relates to a method for operating a burner with a burner head which comprises a die surface with a matrix of orifices for the combustion gases.
    It is proposed to detect a characteristic quantity for a temperature of the burner head in the area of the die surface through at least one temperature sensing element disposed in the area of the surface of the die and the die. use for the actuation of the burner. The method according to the invention allows a very controlled operation of the burner and it is possible to avoid the use of additional monitoring devices, for example ionization electrodes.
    Other features and advantages of the invention result from the following description of the figures. The description of the figures relates to an exemplary embodiment of the invention and contains - as the introduction of the preceding description, the claims and figures - many features in combination, which the skilled person will of course also consider individually. and will collect in other interesting combinations.
    The figures show:
    Fig. A burner with a burner head, which comprises a die surface with a matrix of orifices for the combustion gases,
    Fig. 2 an extract of a wire mesh forming the surface of the matrix according to a first configuration of the invention, and 3 an extract of a wire mesh forming a surface of the matrix according to a second configuration of the invention.
    Fig. Fig. 1 shows a burner with a burner head 10, which comprises a die surface 12 with a matrix of orifices for the combustion gases 14 (Fig. 2). The burner is controlled by a control module 18 which operates a fuel transport module 16. The fuel transport module 16 transports gaseous fuel in a space delimited by the surface of the matrix, in which it thus forms a slight overpressure. The gaseous fuel escapes through the orifices for the flue gases 14 from the surface of the die 12 and ignites on a flame front in the outer space outside the burner head 10 surrounded by the surface of the burner. matrix.
    The fuel passing through the surface of the matrix 12 is premixed with oxygen or air containing oxygen and the surface of the matrix 12 prevents, thanks to the high flow velocity gradients that form on the edges of the orifices for the combustion gases 14, a propagation of the flame in the interior space.
    Fig. 2 shows an excerpt from the surface of the die designed in the form of a wire mesh according to a first configuration of the invention. The wire mesh consists of nickel wires, in which chromium nickel (NiCr) wire 20 has been interwoven, for example. Due to the contact of the nickel-plated wire 20 with the nickel wires of the wire mesh 14, a temperature-sensing element takes the form of a thermocouple, since a thermoelectric voltage is produced at the points of contact between the wires of the wire. difference between the temperature in the center of the die surface and the wire suspension and the Seebeck effect. The crossing threads are brazed or welded at the contact points so that these contact points respectively form a temperature sensing element 22 in the form of a thermocouple. In the exemplary embodiment shown in FIG. 2, the chromium nickel wire 20 is welded at each point of intersection with the wire mesh or otherwise connected to reveal a series of thermocouples 22 arranged in a straight line. The chromium nickel wire 20 and the nickel wires of the wire mesh of the surface of the matrix 14 are respectively connected to the control module 18, which can read and evaluate the thermal voltages produced, by means of an analog transformer - 24 digital with built-in amplifier.
    Fig. 3 shows an alternative exemplary embodiment of the invention wherein chromed nickel wires 20 are individually interleaved in the wire mesh forming the surface of the die 12 in a first direction, while in a second direction and at regular intervals, nickel wires 26 are intertwined. In the exemplary embodiment shown in FIG. 3, there is in the first direction, all three wires, a chromed nickel wire 20 and in the second direction from top left to bottom right, every five wires, a nickel wire 26 The chromed nickel wires 20 and the nickel wires 26 are respectively connected together at the crossing points, so that at these crossover points the intersecting wires respectively form a thermocouple 22. The result is a multitude of temperature sensing elements 22 regularly distributed on the surface of the matrix.
    The control module is configured to calibrate, in at least one operating state, an average temperature of the surface of the die 12 of the burner head 10 to a constant predetermined value. The control module 18 uses here as control quantity the amount of fuel transported by the fuel transport module 16. The temperature sensor elements 22 are mounted so as to cause a negative feedback.
    Even if the flame monitoring of the burner head 10 could in principle be operated by separate ionization electrodes, not shown here explicitly, which use the flame straightening action for flame monitoring, in a particularly advantageous configuration of the method of actuating the burner according to the invention, the flame monitoring is done using temperature sensors 22. The control module 18 recognizes the fall of the temperatures detected by the temperature sensor elements It extinguishes the flame and induces an emergency stop to prevent an uncontrolled leakage of gas, which will not be subsequently burned. Thanks to the configuration according to the invention thermocouples in the form of son 20, 26, which intersect and are interlaced in the wire mesh of the surface of the matrix 12, the thermocouples 22 have a particularly low mass and react particularly quickly .
    In another variant configuration of the invention, it would be conceivable for a wire consisting of a first metal, which goes in a first direction, to cross several son made of a second metal, which go in a second direction, and is electrically conductive connected only by one or a portion of the son made of the second metal, while it would be insulated vis-à-vis another part of the son made of the second metal. It is thus possible to obtain a measurement of the point and localized temperature.
    权利要求:
    Claims (14)
    [1]
    Apparatus with a burner head (10), which comprises a die surface (12) with a matrix of orifices for the combustion gases (14), and with a control module (18) for the control of a burner comprising the burner head (10), characterized in that the burner head (10) comprises at least one temperature sensing element (22) disposed in the area of the surface of the die (12) and that the module control unit (18) is adapted to actuate the burner according to the sensor signals of the temperature sensor element (22).
    [2]
    2. Device according to claim 1, characterized in that the surface of the matrix (12) is designed in the form of a wire mesh.
    [3]
    3. Device according to one of the preceding claims, characterized in that the temperature sensor element (22) is designed in the form of a thermocouple.
    [4]
    4. Device according to claims 2 and 3, characterized in that the thermocouple (22) is formed by a contact between two son which intersect (20, 26) of the wire mesh consisting of different materials.
    [5]
    5. Device according to claim 4, characterized in that the crossing son (20, 26) are brazed or welded.
    [6]
    6. Device according to one of the preceding claims, in particular according to claim 4, characterized by a plurality of temperature sensing elements (22) evenly distributed on the surface of the matrix (12).
    [7]
    7. Device according to claim 4, characterized in that at least a portion of the son (20) in a first direction in the wire mesh is formed of another metal at least a portion of the son (26) ranging in a second direction in the wire mesh.
    [8]
    8. Device according to claim 6, characterized in that at least a portion of the son (20) in one direction is made of CrNi.
    [9]
    9. Device according to one of the preceding claims, characterized in that the control module (18) is designed to use the sensor signals of the at least one temperature sensor element (22) for monitoring a flame burner.
    [10]
    10. Device according to one of the preceding claims, characterized in that the control module (18) is designed to adjust the operation of the burner according to the sensor signals of the temperature sensor element (22).
    [11]
    11. Device according to one of the preceding claims, characterized in that the control module (18) is designed to reduce the fuel supply of the burner, when a sensor signal detected by the temperature sensor element ( 22) exceeds a critical value.
    [12]
    A method for operating a burner with a burner head, which comprises a die surface with a matrix of orifices for the combustion gases, characterized in that a characteristic quantity for a temperature of the burner head The burner is detected in the area of the die surface through at least one temperature sensing element disposed in the area of the die surface and is used to drive the burner.
    [13]
    Apparatus with a burner head (10), which comprises a die surface (12) with a matrix of orifices for the combustion gases (14), and with a control module (18) for the control of a burner comprising the burner head (10), wherein the burner head (10) comprises at least one temperature sensing element (22) disposed in the area of the surface of the die (12) and the control module ( 18) is adapted to actuate the burner according to the sensor signals of the temperature sensing element (22) and wherein the surface of the matrix (12) is in the form of a wire mesh.
    [14]
    Apparatus with a burner head (10), which comprises a matrix surface (12) in the form of a wire mesh with a matrix of orifices for the combustion gases (14), and with a control module (18) for controlling a burner comprising the burner head (10), wherein the burner head (10) comprises at least one temperature sensing element (22) disposed in the area of the burner head (10). the die (12) and the control module (18) are arranged to actuate the burner according to the signals of the thermocouple (22), the thermocouple (22) being formed by contact between two intersecting wires (20). , 26) of the lattice made of different materials.
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    同族专利:
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    引用文献:
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    CN103502732A|2011-05-06|2014-01-08|贝卡尔特燃烧技术股份有限公司|Premix gas burner with temperature measurement|DE1529197B1|1966-04-06|1970-04-30|Kurt Krieger|Radiant burner|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102008006067A|DE102008006067B4|2008-01-25|2008-01-25|Device with a burner head and method for operating a burner|
    DE102008006067|2008-01-25|
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