System and method to detect flame rod/sensor malfunction
AssigneeFireye, Inc.
InventorsKanna Selvakani, Manu Natesan, Aditya Kumar
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Abstract
A method of monitoring a flame rod of a furnace including: detecting an average current of the flame rod during a burn cycle of the furnace; determining a burn time of the burn cycle of the furnace; and determining a remaining life of the flame rod based on at least the average current and the burn time.
Claims18
A method of monitoring a flame rod of a furnace, the method comprising:
- initiating a burn cycle of the furnace by igniting a fuel supplied to the furnace;
- applying a flame excitation voltage across the flame rod;
- detecting an average current of the flame rod during the burn cycle of the furnace, maintaining a constant flame excitation voltage across the flame rod when the average current is being detected;
- determining a burn time of the burn cycle of the furnace;
- and
- determining a remaining life of the flame rod based on at least the average current and the burn time.
A flame rod monitoring system for monitoring a flame rod of a furnace, the flame rod monitoring system comprising:
- a processor;
- and
- a memory comprising computer-executable instructions that, when executed by the processor, cause the processor to perform operations, the operations comprising:
- initiating a burn cycle of the furnace by igniting a fuel supplied to the furnace;
- applying a flame excitation voltage across the flame rod;
- detecting an average current of the flame rod during the burn cycle of the furnace, maintaining a constant flame excitation voltage across the flame rod when the average current is being detected;
- determining a burn time of the burn cycle of the furnace;
- and
- determining a remaining life of the flame rod based on at least the average current and the burn time.
A computer program product tangibly embodied on a non-transitory computer readable medium, the computer program product including instructions that, when executed by a processor, cause the processor to perform operations comprising:
- initiating a burn cycle of the furnace by igniting a fuel supplied to the furnace;
- applying a flame excitation voltage across the flame rod;
- detecting an average current of a flame rod during the burn cycle of the furnace, maintaining a constant flame excitation voltage across the flame rod when the average current is being detected;
- determining a burn time of the burn cycle of a furnace;
- and
- determining a remaining life of the flame rod based on at least the average current and the burn time.
A furnace comprising:
- a burner box;
- a burner assembly located within the burner box;
- a gas valve configured to supply fuel to the burner assembly;
- a flame rod configured to detect a flame in the burner box;
- a controller configured to perform operations comprising:
- detecting an average current of the flame rod during a burn cycle of the furnace;
- determining a burn time of the burn cycle of the furnace;
- and
- initiate determining a remaining life of the flame rod based on at least the average current and the burn time.
Dependencies are inferred from the claim text.