US 11,614,258 B2 · Boiler and the method for controlling combustion of the boiler

Abstract

The present invention relates to a boiler which determines a clogging degree of an exhaust flue through which combustion gas is discharged and adjusts gas supply amount to maintain its combustibility, and a combustion control method thereof, the method of the present invention including a) setting a target heat value for achieving a target temperature, b) applying a first database on the basis of the target heat value, c) measuring a rotational speed of an air blower and a pneumatic pressure of air introduced by rotation of the air blow, d) applying a second database on the basis of a rotational speed difference, a pneumatic pressure difference, and the target heat value to calculate an estimated flue clogging value according to the target heat value, and a) applying a third database according to the estimated flue clogging value to calculate an opening amount of a gas valve and control gas supply amount.

Claims9

Dependent claims

A combustion control method of a boiler provided with an air blower configured to rotate such that air and gas are introduced, a gas valve configured to adjust an opening or closing degree of a gas supply pipe into which gas is introduced, and a controller configured to control the air blower and the gas valve, the method comprising the steps of:

A) calculating an estimated flue clogging value for estimating the degree of flue clogging by comparing a preset target rotation speed of the air blower according to the target heat value with the rotation speed measurement value of the air blower, and simultaneously comparing a preset target air pressure which is the pressure of the air introduced by the rotation of the air blower according to the target heat value with the air pressure measurement value which is the pressure of the air introduced by the rotation of the air blower;
and
B) controlling an opening degree of the gas valve with the amount of the gas valve according to the calculated estimated flue clogging value to control a supply amount of gas which is being introduced, thereby adjusting gas ratio inside a combustion chamber and maintaining the combustibility of the boiler.

A boiler comprising:

a rotational speed measuring section configured to measure a rotational speed of an air blower by which gas and air are introduced;
a pneumatic pressure measuring section configured to measure a pneumatic pressure which is a pressure of air introduced through the air blower;
and
a controller configured to calculate an estimated flue clogging value for estimating the degree of flue clogging by comparing a preset target rotation speed of the air blower according to the target heat value with the rotation speed measurement value of the air blower, and simultaneously comparing a preset target air pressure which is the pressure of the air introduced by the rotation of the air blower according to the target heat value with the air pressure measurement value which is the pressure of the air introduced by the rotation of the air blower and to adjust an opening degree of the gas valve with the amount of a gas valve according to the calculated estimated flue clogging value to control a supply amount of gas which is being introduced, thereby adjusting gas ratio inside a combustion chamber and maintaining the combustibility of the boiler.

1 more element

Dependencies are inferred from the claim text.

Boiler and the method for controlling combustion of the boiler

Life of this patent

Boiler and the method for controlling combustion of the boiler

Life of this patent

Abstract

Claims9