| 摘要 |
PURPOSE: A detecting method for gas pressure reduction is provided to improve reliability by the combustion control of a gas boiler. CONSTITUTION: A detecting method for gas pressure reduction using a differential pressure sensor comprises: a step of calculating and storing the differential pressure between a pneumatic pressure and a current gas pressure detected by a differential pressure sensor when a burner is turned on(S3); a step of decreasing the current amount of heat of the burner as much as a predetermined amount(X%) for a predetermined time(t1), returning back to the original state, and detecting the differential pressure at this moment(S4); a step of determining whether or not the result value of the stored differential pressure minus the differential pressure, at the time when decreasing the predetermined amount(X%) of heat for a predetermined time(t1), is greater than a predetermined value(+/-A)(S5); and a step of normally operating a boiler if the value is greater than the predetermined value(+/-A)(S6). [Reference numerals] (AA) Start; (BB) Stopping a boiler; (S1) Driving a boiler; (S10) t2 passed; (S11) If experienced limitation of heat quantity; (S12) Raising X% compared to the previous control heat quantity; (S2) Stabilized point; (S3) Calculating/storing a differential pressure by detecting the current gas pressure and air pressure; (S4) Detecting a differential pressure by dropping the current control heat quantity by X% for a predetermined time(t1) and recovering; (S5) Stored differential pressure - Current differential pressure =±A or greater; (S6) Normal gas pressure - Normal boiler operation; (S7) Dropping X% compared to the previous control heat quantity; (S8) Dropped control heat quantity <= Heat quantity limit; (S9) Boiler in operation; |
