Controller for re-igniting

Abstract

A controller for re-ignition connecting each of a plurality of ignition and flame detecting probes of burners provided on a combustion device, and communicating with each of a plurality of igniting switches on the combustion device, the controller for re-ignition at least has in a control box: an ignition control unit, an ignition activating unit and plural flame detecting units; the ignition and flame detecting probes have both the functions of flame detecting and high voltage discharging; when the igniting switches are turned on and no flame exists on the burners, by operation of the above units, the ignition and flame detecting probes start to discharge with high voltage for ignition, thus combustion gas released from the corresponding burners burns, if extinguishment occurs during burning of the burners, by detecting and the action of re-ignition of the ignition and flame detecting probes, the burners once more burn.

1 . A controller for re-ignition, said controller for re-ignition is connected with each of at least an ignition and flame detecting probe of at least a burner provided on a combustion device, and is communicated with each of at least an igniting switch provided on said combustion device; said controller for re-ignition at least is provided in a control box with: 
 an ignition control unit having a rectifying voltage stabilizer for rectifying and stabilizing electric current, a relay connected to a rear end of said rectifying voltage stabilizer, a controller for switching state of operating of said relay and an idling protecting device;    an ignition activating unit having a voltage multiplier for voltage multiplying on output electric power provided by said relay, a diode D 1  connected to a rear end of said voltage multiplier, a resistant R 1  connected to a rear end of said diode D 1 , an electric storage and discharge device connected to a rear end of said resistant R 1  and a voltage supercharger connected to a rear end of said electric storage and discharge device and connected with said ignition and flame detecting probe;    at least a flame detecting unit integrating therein a flame detecting and ignition control circuit, and connecting with said ignition and flame detecting probe and said ignition control unit; wherein a flame detecting circuit is for coupling of said electric supply through a capacitor C 6  to provide voltage for said ignition and flame detecting probe via a resistant R 8 , a grounding end is provided between said resistant R 8  and said ignition and flame detecting probe for detecting whether a flame on said burner exists; one end of said ignition control circuit is connected with said controller, while its other end is connected with one of said igniting switch;    by cooperation of the above members, when said igniting switch is turned on, and a flame does not exist on said burner, said ignition control unit drives said ignition activating unit for operation, thus said ignition and flame detecting probe starts to discharge with high voltage for ignition; when said ignition and flame detecting probe detects a flame, said ignition control unit stops driving said ignition activating unit; if extinguishment occurs during the process of burning on said burner, by detecting of said ignition and flame detecting probes, said ignition control unit once more drives said ignition activating unit for operation, and said ignition and flame detecting probe once more discharges with high voltage for ignition.    
   
   
       2 . The controller for re-ignition as in  claim 1 , wherein said rectifying voltage stabilizer is composed of a capacitor C 2 , a diode D 2 , a diode D 3 , a resistant R 3 , a Zener diode ZD 1  and a capacitor C 3 .  
   
   
       3 . The controller for re-ignition as in  claim 1 , wherein said controller is composed of an NPN transistor Q 2  and an NPN transistor Q 3 ; a base of said NPN transistor Q 3  is connected with a flame detecting unit; said ignition control unit has therein a resistant R 5 , a resistant R 6  and a capacitor C 5  for controlling time delay between extinguishing and ignition as well as ignition and ceasing ignition of said base of said NPN transistor Q 2 ; said ignition control unit further has therein a resistant R 7 , a resistant R 9 , a capacitor C 8  and a Zener diode ZD 3  for controlling time delay between ignition and ceasing ignition of said base of said NPN transistor Q 3 .  
   
   
       4 . The controller for re-ignition as in  claim 1 , wherein said idling protecting device is composed of a resistant R 2 , a resistant R 4  and an NPN transistor Q 1 .  
   
   
       5 . The controller for re-ignition as in  claim 1 , wherein said voltage multiplier is composed of a capacitor C 1  and a diode D 5 .  
   
   
       6 . The controller for re-ignition as in  claim 1 , wherein said electric storage and discharge device is composed of a capacitor C 4  and a fast thyrister.  
   
   
       7 . The controller for re-ignition as in  claim 1 , wherein said ignition control circuit further includes a resistant R 14  connecting to a gate of a field effect transistor Q 4 ; a source of said field effect transistor Q 4  is connected to an AC-N end of the electric supply via the igniting switch.  
   
   
       8 . The controller for re-ignition as in  claim 1 , wherein number of said at least a burner provided on said combustion device is one.  
   
   
       9 . The controller for re-ignition as in  claim 1 , wherein number of said at least a burner provided on said combustion device is plural.  
   
   
       10 . The controller for re-ignition as in  claim 9 , wherein said control box is provided with a plurality of ignition and flame detecting connecting ports to connect said at least a ignition and flame detecting probe.