METHOD OF CONTROLLING ROTATIONAL FREQUENCY OF EXHAUST FAN AND FEED RATE OF GAS FOR GAS BOILER

摘要

Purpose: a kind of feed rate of method and gas for controlling the speed of a scavenger fan is arranged to optimize the movement of a gas boiler and the variation of the blast switch that adapts to the speed and enough gas by supplying the speed for fan by one scavenger fan of control. Construction: a kind of method includes the following steps:: gradually reducing the voltage of a scavenger fan from crest value and detects voltage when a wind pressure voltage is turned off; Continue to reduce voltage step step if switch is turned on, be turned off as low-voltage setting voltage before the switch; Divide the minimum feed rate appropriate for entering gas multistep and that setting is for each step with high voltage.