DETECTION METHOD FOR COMBUSTION OF INSTALLED WIND PRESSURE SWITCH FOR EXHAUST BOILER

摘要

The present invention relates to an exhaust closing detection method during combustion of a boiler in which a wind pressure switch is installed, more specifically, which comprises the following steps of: starting to count exhaust closing detection time (t1) when combustion starts; continuously determining whether time calculated by a timer passes the exhaust closing detection time (t1); detecting and memorizing a current value (mA) of a gas valve compared to the current number of rotation of a blower fan when the predetermined exhaust closing detection time (t1) elapses; raising the number of rotation of the blower fan to movement pressure of the wind pressure switch; determining the current value of the gas valve memorized in a memory device; controlling an amount of opening and closing the gas valve; determining whether the wind pressure switch installed in a ventilating path is in an off state; and safely stopping a burner in addition to finishing an exhaust closing detection process by recognizing an exhaust closing state when the wind pressure switch is in an off state. Therefore, reliability can be significantly increased in accordance with exhaust closing detection during combustion with the wind pressure switch.