Gas Burner for a Gas Hob, Gas Cooker, and Method for Operating a Gas Hob

Abstract

A gas burner for a gas cooktop has a gas burner body with gas outlet openings. A thermogenerator is arranged above the gas burner body, advantageously arranged concentrically relative to said gas burner body and with the same shape and size, wherein the thermogenerator is heated by said gas burner body. The thermogenerator bears against a cooler pot base by way of its upper face. The thermogenerator generates electrical energy which is used to operate a control of the gas cooktop and which can be stored.

1 . A gas burner for a gas cooktop comprising a gas burner body, the gas burner body comprising gas outlet openings, wherein a thermogenerator is arranged above said gas burner body. 
     
     
         2 . The gas burner as claimed in  claim 1 , wherein said thermogenerator is concentric relative to said gas burner. 
     
     
         3 . The gas burner as claimed in  claim 1 , wherein said thermogenerator has the same shape as said gas burner. 
     
     
         4 . The gas burner as claimed in  claim 1 , wherein said thermogenerator is in the form of a disk. 
     
     
         5 . The gas burner as claimed in  claim 1 , wherein said thermogenerator is held above said gas burner body by resilient holding means and is pushed upward to bear against a lower face of a pot which is located above said gas burner, wherein said abutment is subject to an action of a spring force. 
     
     
         6 . The gas burner as claimed in  claim 1 , wherein said gas burner openings are arranged in one plane, and wherein said thermogenerator is arranged approximately parallel to said plane of said gas burner openings. 
     
     
         7 . The gas burner as claimed in  claim 1 , wherein a lower first heat conduction element is arranged between said gas burner body and said thermogenerator, wherein said lower first heat conduction element is in the form of a disk. 
     
     
         8 . The gas burner as claimed in  claim 7 , wherein said lower first heat conduction element is larger than said gas burner body, wherein said lower first heat conduction element projects laterally beyond said gas burner body by at least 10% of a diameter of said gas burner body. 
     
     
         9 . The gas burner as claimed in  claim 8 , wherein said lower first heat conduction element has, in its edge region, recesses in the form of incisions. 
     
     
         10 . The gas burner as claimed in  claim 1 , wherein a further upper second heat conduction element is provided on an upper face of said thermogenerator, wherein said upper second heat conduction element is in the form of a disk and is approximately the same size as said thermogenerator. 
     
     
         11 . The gas burner as claimed in  claim 1 , wherein said gas burner is in the form of a single-ring burner with a single gas burner body and a single ring of gas burner openings in said gas burner body. 
     
     
         12 . The gas burner as claimed in  claim 1 , wherein said gas burner is in the form of a two-ring burner with an inner gas burner body and an outer gas burner body, wherein said thermogenerator is arranged above said inner gas burner body. 
     
     
         13 . The gas burner body as claimed in  claim 12 , configured so that a gas flame is formed on the inner gas burner body in a manner which cannot be regulated but rather always operates with a thermal power which is designed in such a way that said thermogenerator generates a required electrical power. 
     
     
         14 . The gas burner as claimed in  claim 13 , configured so that a gas flame is formed on said outer gas burner body in a manner which can be regulated. 
     
     
         15 . The gas burner as claimed in  claim 1 , wherein said thermogenerator is part of a pot support for a pot and is arranged on said gas burner such that the thermogenerator cannot move in the vertical direction. 
     
     
         16 . The gas burner as claimed in  claim 1 , wherein said thermogenerator is designed such that the thermogenerator can be removed from said gas burner body and from said gas burner. 
     
     
         17 . A gas cooktop having at least one gas burner comprising a gas burner body, the gas burner body comprising gas outlet openings, wherein a thermogenerator is arranged above said gas burner body, wherein said thermogenerator has an electrical connection to a power supply of said gas cooktop, wherein said power supply is connected to a controller of said gas cooktop. 
     
     
         18 . The gas cooktop as claimed in  claim 17 , wherein said power supply has an energy store comprising a rechargeable battery. 
     
     
         19 . The gas cooktop as claimed in  claim 17 , wherein said gas cooktop has at least one electrical ignition device for igniting the at least one gas burner. 
     
     
         20 . The gas cooktop as claimed in  claim 17 , wherein said gas cooktop is designed without an electrical connection or an option of being electrically connected to a mains power supply system. 
     
     
         21 . The gas cooktop as claimed in  claim 17 , wherein said electrical power of said thermogenerator is designed to be higher than an actual power required by said controller of said gas cooktop in order to store excess electrical energy from said thermogenerator in the energy store. 
     
     
         22 . The gas cooktop as claimed in  claim 17 , wherein said gas cooktop has electronically controlled electrical gas valves for supplying gas to said gas burners, said electrical gas valves configured such that at a minimum power setting in a gas burner in the form of a two-ring burner with an inner gas burner and an outer gas burner, said inner gas burner is ignited and burns with a specific thermal power, wherein said specific thermal power is designed such that said thermogenerator generates a required electrical power for supplying an electronic controller, wherein said inner gas burner burns with a higher thermal power when said gas valve is opened further and then said outer gas burner can be ignited, and a thermal power of said outer gas burner can be regulated. 
     
     
         23 . A method for operating a gas cooktop comprising a gas burner, the gas burner comprising a gas burner body which has gas outlet openings, wherein a thermogenerator is arranged above said gas burner body, wherein said thermogenerator has an electrical connection to a power supply of said gas cooktop, wherein said power supply is connected to a controller of said gas cooktop, the method comprising:
 checking whether a pot is placed over said gas burner and has cooled a cold side of the thermogenerator, wherein the thermogenerator produces a signal have a thermoelectric voltage; and   evaluating the signal by a controller of the gas cooktop to determine whether the pot is present.   
     
     
         24 . A method for operating a gas cooktop comprising a gas burner, the gas burner comprising a gas burner body which has gas outlet openings, wherein a thermogenerator is arranged above said gas burner body, wherein said thermogenerator has an electrical connection to a power supply of said gas cooktop, wherein said power supply is connected to a controller of said gas cooktop, the method comprising:
 monitoring a temperature of a pot base of a pot placed on the gas cooktop using a profile of a thermoelectric voltage at the thermogenerator;   determining a phase of a constant temperature of the pot base during operation of the gas burner followed by a subsequent rapid increase in temperature of the pot base;   determining by the controller of the gas cooktop that the pot placed on the gas cooktop has boiled dry; and   outputting by the controller a signal to turn off the gas burner.   
     
     
         25 . A method for operating a gas cooktop comprising a gas burner, the gas burner comprising a gas burner body which has gas outlet openings, wherein a thermogenerator is arranged above said gas burner body, wherein said thermogenerator has an electrical connection to a power supply of said gas cooktop, wherein said power supply is connected to a controller of said gas cooktop, comprising:
 detecting by the controller a thermal power generated at the gas burner by a gas throughflow rate to the gas burner by detecting an open position of the gas value;   comparing the thermal power with the electrical power output by the thermogenerator and based on a result of the comparison determining a temperature of a pot base that has been placed on the gas burner.   
     
     
         26 . The method as claimed in  claim 25 , wherein detected measurement variables comprising the detected thermal power and detected open position of the valve are used to regulate said cooking processes.