Boiler having exhaust gas temperature control unit using temperature sensor and method for controlling same

Abstract

A boiler having a combustion and exhaust unit having a burner for combusting fuel to generate heat, an exhaust port for discharging the combustion residue outside the boiler, and an exhaust pipe connected to the exhaust port, for guiding the combustion residue into the open air; a circulation unit for circulating hot water to provide hot water and heat for the user; a heat exchange unit for absorbing the heat generated from the burner to make hot water and for supplying the hot water to the circulation part, with both ends of the heat exchange part being connected to the circulation part; and a control unit including an outlet temperature sensor arranged in the outlet of the heat exchange unit, an inlet temperature sensor arranged in the inlet of the heat exchange unit, and a controller for calculating the temperatures measured by the inlet and outlet temperature sensors so as to control whether to operate the boiler or not.

1 . A boiler having an exhaust gas temperature control unit using a temperature sensor, comprising:
 a combustion and exhaust unit  100  configured to include a burner  120  combusting fuel to generate heat, an exhaust port  130  discharging combusting residues outside the boiler, and an exhaust pipe  140  connected to the exhaust port  130  to discharge the combustion residues into the air;   a circulation unit  300  configured to circulate hot water to provide hot water and heating to a user;   a heat exchange unit  200  configured to absorb the heat generated from the burner  120  to generate hot water and have both ends connected to the circulation unit  300  to supply the hot water to the circulation unit  300 ; and   a control unit  400  configured to include an outlet temperature sensor  410  installed at an outlet of the heat exchange unit  200  to measure a temperature of the hot water, an inlet temperature sensor  420  installed at an inlet of the heat exchange unit  200  to measure a temperature of cold water introduced from the circulation unit  300 , and a controller  430  calculating temperature values measured by the outlet temperature sensor  410  and the inlet temperature sensor  420  to control whether the boiler is operated.   
     
     
         2 . The boiler of  claim 1 , wherein the exhaust pipe  140  is made of a PVC material. 
     
     
         3 . A method for controlling a temperature of exhaust gas using a temperature sensor, comprising:
 initializing a calculation value of the temperature of the exhaust gas of a controller  430  when the boiler is in an operation condition and thus performs a combustion operation (S 10 );   measuring and storing, by the controller  430 , a temperature T1 of an inlet and a temperature T2 of an outlet of a heat exchanger using an outlet temperature sensor  410  and an inlet temperature sensor  420  (S 20  and S 30 );   calculating, by the controller  430 , the temperature of the exhaust gas (S 40 );   determining, by the controller  430 , whether the calculated temperature of the exhaust gas exceeds a meltable temperature of the exhaust pipe  140  (S 60 );   controlling, by the controller  430 , a combustion operation to stop if it is determined that the calculated temperature of the exhaust gas exceeds the meltable temperature of the exhaust pipe  140  (S 70 ); and   controlling, by the controller  430 , a series of combustion operations to be performed if it is determined that the calculated temperature of the exhaust gas is equal to or less than the meltable temperature of the exhaust pipe  140  (S 80 ).   
     
     
         4 . The method of  claim 3 , wherein the meltable temperature of the exhaust pipe  140  is 65° C.