Method for operating a gas oven and a gas oven

Abstract

In the method for operating a gas oven, this has a muffle with a lower gas burner and with an upper gas burner, wherein for its control, an electronic control unit is provided for actuating two gas valves and for igniting the gas burners and also for flame monitoring. For a combination operation with upper heat and lower heat in the muffle, the upper gas burner and the lower gas burner are operated alternately to each other in each case with heating phases.

That which is claimed: 
     
         1 . A method for operating a gas oven, wherein said gas oven has a muffle with a lower gas burner and with an upper gas burner and with gas valves for said burners, wherein for controlling said gas burners, an electronic control unit is provided for actuating said gas valves and for igniting said gas burners and also for flame monitoring, wherein for an operating mode with upper heat and lower heat in said muffle said upper gas burner and said lower gas burner are operated alternately to each other. 
     
     
         2 . The method as claimed in  claim 1 , wherein temperature controlling in the gas oven is carried out via an electromechanical thermostat or via a temperature controller. 
     
     
         3 . The method as claimed in  claim 1 , wherein said upper gas burner and said lower gas burner are always operated alternately and always operated consecutively. 
     
     
         4 . The method as claimed in  claim 3 , wherein said upper gas burner and said lower gas burner are never operated at the same time. 
     
     
         5 . The method as claimed in  claim 1 , wherein between each heating phase either of said upper gas burner or of said lower gas burner a pause is provided without operation of a gas burner. 
     
     
         6 . The method as claimed in  claim 1 , wherein during a heating phase, a changeover is made from one said gas burner to the other said gas burner after a specified time. 
     
     
         7 . The method as claimed in  claim 6 , wherein said changeover is made during the heating up of said gas oven or of said muffle with a short pause without heating between two heating phases of said gas burners. 
     
     
         8 . The method as claimed in  claim 1 , wherein a thermostat for temperature control has a cycle time as a thermostat cycle, wherein in the event that a heating phase of one of said gas burners is shorter than said cycle time of said thermostat, also after a heating phase for said heating up during continuous operation of said gas burner, a changeover of said gas burner is carried out during said thermostat cycle. 
     
     
         9 . The method as claimed in  claim 8 , wherein said event is during said heating up of said muffle. 
     
     
         10 . The method as claimed in  claim 1 , wherein a thermostat for temperature control has a cycle time as a thermostat cycle, wherein in the event that a heating phase of one of said gas burners is carried out during said changeover of said gas burner during said thermostat cycle, a residual time of one of said gas burners, which residual time remains after an interruption of said thermostat cycle, is recovered in a next thermostat cycle. 
     
     
         11 . The method as claimed in  claim 1 , wherein during a changeover of said operating mode of said gas oven from a lower-heat operation of only said lower gas burner or from an upper-heat operation of only said upper gas burner to a joint operation of both said gas burners with changeover between said gas burners, a currently operated gas burner is further operated up to an end of a cycle or of a thermostat cycle. 
     
     
         12 . The method as claimed in  claim 1 , wherein during a changeover of said operating mode of said gas oven from a lower-heat operation of only said lower gas burner or from an upper-heat operation of only said upper gas burner to a joint operation of both said gas burners with changeover between said gas burners, said previously operated gas burner is immediately shut down and after a certain delay time said other gas burner is ignited. 
     
     
         13 . The method as claimed in  claim 1 , wherein in an event that a changeover of said operating mode of said gas oven is carried out during a pause of said gas burners, the other gas burner than said last used gas burner is operated during next operation of said thermostat. 
     
     
         14 . A gas oven for implementing said method as claimed in  claim 1 , comprising:
 said gas oven having a muffle in which are arranged an upper gas burner at the top of said muffle and a lower gas burner at the bottom of said muffle, and   wherein in said muffle also a temperature sensor is provided for temperature control in said muffle, wherein said gas oven is provided with an electronic control unit.   
     
     
         15 . A gas oven for implementing said method as claimed in  claim 1 , comprising:
 said gas oven having a muffle in which are arranged an upper gas burner at the top of said muffle and a lower gas burner at the bottom of said muffle, and   wherein in said muffle also a temperature sensor is provided for temperature control in said muffle, wherein said gas oven is provided with a control unit, which after connection of a corresponding input to a mains potential activates firing of said corresponding gas burner.