Burner

Abstract

A burner has a combustion head, an ignition device, a fuel delivery/regulating device, a combustion air delivery/regulating device, a safe operation monitoring device, and an electronic control device. The combustion air delivery/regulating device has an air flap mechanism controlled by an air flap actuator, and an inverter for controlling the rotation speed of a blower motor, and has a displacement sensor, linked with the air flap actuator and for controlling the output frequency of the inverter. A program controller of the electronic control device instructs the air flap actuator to control the opening position of the air flap mechanism according to the requirements of a combustion load. The inverter regulates, according to a signal with respect to the opening position of the air flap mechanism and detected by the displacement sensor, the frequency output to the blower motor so as to control the rotation speed of the blower motor.

1 . A burner comprising a combustion head ( 10 ), an ignition device, a fuel delivery/regulating device ( 12 ), a combustion air delivery/regulating device ( 14 ), a safety operation monitoring device, and a control device ( 16 ), wherein the combustion air delivery/regulating device ( 14 ) comprises a shell casing ( 140 ), a blower impeller ( 141 ) fitted in the shell casing ( 140 ), a blower motor ( 142 ) linked with the blower impeller ( 141 ) for rotating the blower impeller ( 141 ), an air flap mechanism ( 143 ) fitted in the shell casing ( 140 ), an air flap actuator ( 145 ) linked with an air flap baffle ( 144 ) of the air flap mechanism ( 143 ) to control the opening position of the air flap mechanism ( 143 ), a displacement sensor ( 146 ) for detecting the opening position of the air flap mechanism ( 143 ) and an inverter ( 147 ) respectively wired to the blower motor ( 142 ) and the displacement sensor ( 146 ); wherein, the shell casing ( 140 ) is connected to the combustion head ( 10 ) via an air duct ( 148 ), the air flap actuator ( 145 ) is wired to a program controller ( 160 ) of the control device ( 16 ) and is controlled to operate by the program controller ( 160 ), the program controller ( 160 ) outputs a signal to the air flap actuator ( 145 ) to control the opening position of the air flap mechanism ( 143 ) according to the requirements of a combustion load, the displacement sensor ( 146 ) outputs a detected signal with respect to the opening position of the air flap mechanism ( 143 ) to the inverter ( 147 ), and the inverter ( 147 ) accordingly regulates the frequency output to the blower motor ( 142 ); and the program controller ( 160 ) is wired to a firepower regulating controller ( 150 ), the firepower regulating controller ( 150 ) is wired to a temperature/pressure sensor ( 151 ) installed at a thermal device to detects the temperature/pressure of the thermal device, the detected is fed back to the firepower regulating controller ( 150 ) and accordingly calculates the opening position of the air flap mechanism ( 143 ) and transfer to the program controller ( 160 ) to drive the air flap actuator ( 145 ). 
     
     
         2 . (canceled) 
     
     
         3 . The burner according to  claim 1 , wherein a fuel regulating valve ( 121 ) installed at the fuel delivery/regulating device is an air/fuel ratio fuel regulating valve, which has an air pressure detecting tube to detect the air pressure in the air duct ( 148 ) of the combustion air delivery/regulating device ( 14 ) and accordingly regulates the opening position of the fuel regulating valve ( 121 ), so as to control the flow of the fuels. 
     
     
         4 . The burner according to  claim 3 , wherein the fuel regulating valve ( 121 ) has a servo stabilizer fitted therein, which has a fuel pressure detecting tube ( 123 ) to detect the fuel pressure at the outlet of the fuel regulating valve ( 121 ), and accordingly regulates the opening position of the fuel regulating valve ( 121 ), in order to maintain a stable pressure at the outlet of the fuel regulating valve. 
     
     
         5 . The burner according to  claim 1 , wherein the displacement sensor ( 146 ) is installed at the air flap actuator ( 145 ). 
     
     
         6 . The burner according to  claim 1 , wherein the displacement sensor ( 146 ) is installed at the air flap mechanism ( 143 ). 
     
     
         7 . The burner according to  claim 1 , wherein the displacement sensor ( 146 ) is a potentiometer. 
     
     
         8 . The burner according to  claim 7 , wherein the potentiometer is a rotating-type or sliding-type potentiometer. 
     
     
         9 . The burner according to  claim 1 , wherein the inverter ( 147 ) is wired to the program controller ( 160 ) which controls the start/stop of the inverter ( 147 ).