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Burner arrangementBurner arrangement description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20090253086, Burner arrangement. Brief Patent Description - Full Patent Description - Patent Application Claims
The invention relates to a burner arrangement as defined in the preamble of claim 1. Such a burner arrangement is generally known in accordance with the state of technology. In particular, gas burners are equipped with a nozzle or burner plate made of metal. During operation of the gas burner, a gas flowing through the nozzles is burnt. In this connection, flames extend from a top side of the burner plate. During operation, it can happen, among other things, that the flames are extinguished by a gust of wind, for example. In this case, gas would escape through the nozzles. In a closed room, for example, this can create an explosive mixture of gas and air. To avoid this, a monitoring unit is provided on the burner plate to monitor the extinguishment of the flames extending from the burner plate. In the monitoring unit, the metallic burner plate serves as the cathode. An anode is provided above the cathode in the area of the flames. The extinguishment of a flame can be detected based on a significant change in the electrical conductivity between the cathode and the anode and, as a result of this, a safety shutoff valve installed in a gas feeder line can be closed. Such gas burners which burn the gas by creating an open flame do not make optimal combustion possible, among other things. From DE 43 22 109 A1 a so-called gas pore burner is known. In this connection, the gas is burned in a volume burner element made of porous ceramic. The suggested gas pore burner makes possible particularly clean combustion. Due to the provision of a volume burner element, an undesirable breakdown of the combustion reaction will almost never occur during operation. However, also with such a gas pore burner the undesirable escape of combustible gas is still possible, for example, due to a defective ignition unit. The object of the invention is to eliminate the disadvantages as per the state of technology. In particular, a burner arrangement is to be specified which makes low-pollution combustion possible and, at the same time, the quick and reliable detection of the undesired escape of unburnt fuel. This object is solved by the features of claim 1. Useful embodiments of the invention result from the features of claims 2 to 12. According to the provisions of the invention, it is provided that the burner plate is made from a non-metallic material and the cathode is located as a separately formed component in the area of the top side of the burner plate. Due to the use of a non-metallic material, a ceramic material for example, to make the burner plate, the temperature resistance and thus the durability of such a formed burner arrangement is improved. The provision of a cathode designed as a separate component makes possible the creation of the monitoring unit to monitor the formation of a combustion zone extending from the burner plate. The suggested burner arrangement makes possible quick and reliable detection of the extinguishment of a flame, a faulty ignition or similar. The suggested burner arrangement is suitable for the implementation of both surface and volume burners. Such burners make particularly clean fuel combustion possible. The term “fuel” is understood to mean in particular gaseous fuels, for example combustible gases, vaporized liquid fuels, for example mixtures of vaporized oil and air, alcohol/air mixtures and similar. According to an advantageous embodiment, it is provided that a volume burner body with a combustion-enabling, communicating pore area is located opposite the top side. The provision of such a volume burner body makes possible a simple and inexpensive way to make a volume burner. In this case, the combustion of the fuel occurs essentially within the volume burner body. In this connection, a slit with a specified width can be provided between the top side and a bottom side of the volume burner body. The width of the slit is usefully 0.5 to 15 mm, preferably 1 to 5 mm. The provision of the suggested slit simplifies ignition. According to a further advantageous embodiment, the volume burner body and/or the burner plate is/are made of a ceramic material. In this connection, this can be porous ceramic, a perforated plate, a ceramic foam or similar. According to a useful embodiment, the cathode is located in the slit. It can lie on the top side, for example. But it is considered as particularly advantageous when the cathode is contained in a recess which opens towards the top side of the burner plate. In this case, an undesirable strong heating up of the cathode during the operation of the burner arrangement is avoided. This makes possible a particularly precise detection of a malfunction. It is useful that at least some of the breakthroughs provided in the burner plate open in the recess. Due to this, the cathode contained in the recess is surrounded by still unburnt gas and thus cooled. The recess is preferably designed deep enough so that the cathode can be completely contained in it. In other words, the cathode does not protrude out of the recess over the top side, in particular, not in the area of the combustion zone. According to a further embodiment, it is provided that the cathode extends from the recess to a further bottom side of the burner plate opposite the top side. This makes possible a simple way to conduct off the heat from the cathode to the opposite further bottom side which is cool. According to a further embodiment, it is possible that the cathode is contained in a recess which opens towards the bottom side of the volume burner body. Besides this, it is also conceivable that to some extent the cathode is partially contained in a [lacuna] on the top side of the burner plate as well as in a [lacuna] on the bottom side of the volume burner body. According to a further embodiment, it is provided that the recess is formed corresponding to the shape of the cathode. This provides a simple and inexpensive way to prevent undesired strong heating up of the cathode. The cathode can be formed from a perforated plate or, preferably a spiral or meandering-shaped, bent wire. It is usefully made of a temperature-resistant metal. The suggested burner arrangement is usefully used with gas burners in particular. Examples will now be used to describe the invention in more detail based on the drawings. The figures are listed below: Continue reading about Burner arrangement... Full patent description for Burner arrangement Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Burner arrangement patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Burner arrangement or other areas of interest. ### Previous Patent Application: Non-corrosive treatment to enhance pressurized and non-pressurized pulverized coal combustion Next Patent Application: Ignition control with integral carbon monoxide sensor Industry Class: Combustion ### FreshPatents.com Support Thank you for viewing the Burner arrangement patent info. 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