| 摘要 |
The main burner(1) and the pilot burner(2) are operated by the air from a fan(3). The air excess ratio of each burner is set differently. Frame rods are reached to the combustion plane(1a,2a) of the burners(1,2) to sense the frame electric current. This current value is input to the comparison device through a currentvoltage transformer(6) and an amplifier(7). The output of the comparison device controls the combustion state. An air supply controller (14) controls the air flow into the burnners at the air pressure of the fan. An interval circuit(13) transforms the driving condition of the fan from high load to low load.
|
