| 摘要 |
PURPOSE:To automatically control the fuel feed rate so as to obtain a constant air-fuel ratio by a method wherein fuel is sent to a fuel control equalizer valve through a fuel differential pressure control equalizer valve, and the fuel differential pressure control equalizer valve is controlled according to the outlet pressure of the fuel control equalizer valve. CONSTITUTION:Air is supplied to a burner 1 through an air temperature control valve V1, and a fuel control equalizer valve V2 is brought into action by a fuel control pressure Px which is taken between the burner 1 and the air temperature control valve V1 to control the fuel feed rate to the burner 1. Fuel is supplied through a fuel differential pressure control equalizer valve V4 to the fuel control equalizer valve V2. The fuel differential pressure control equalizer valve V4 is controlled according to the outlet pressure P4 of the fuel control equalizer valve V2. By this constitution, a desired air-fuel ratio can be kept constant by automatic control over the entire operation range from the high temperature region to the low temperature region, so that ease of operation and combustion efficiency are improved. |
