Air proportional control type combustion device and method for adjusting heat amount thereof

Abstract

Disclosed are an air proportional control type combustion device and a method for adjusting the heat amount thereof. The combustion device according to the present invention, which controls the output heat amount by controlling the RPM of a blower, is capable of compensating for an air flow rate with respect to external circumstances such as place of installation, blocking of a gas duct, and seasonal changes, or the RPM of the blower caused by such situational changes. In a case where there is a difference between air pressure (Act. APS) measured after the blower is driven at a reference RPM (Ref. RPM) in a state where gas supply is blocked and reference air pressure (Ref. RPM), the combustion device compensates for the difference while causing the RPM to vary and applies the varied RPM as a new reference RPM.

1 . An air proportional control type combustion device comprising:
 a blower for delivering mixed air in which a gas is mixed with air;   a gas valve disposed in a gas tube connected to the blower to control an amount of gas introduced into the blower;   an air pressure sensor disposed in an air tube connected to the blower to measure a pressure of the air introduced into the blower;   a memory in which a reference air pressure for each output heat amount of a combustion device and a reference RPM for outputting the reference air pressure are stored; and   a control part for controlling the blower at the reference RPM stored in the memory to output a heat amount requested by a user,   wherein the control part comprises a blower adjusting unit for changing the RPM of the blower until the measured value becomes to the reference air pressure when the measured value of the air pressure sensor read in a state in which the gas valve is closed, and the air blower is driven at the reference RPM is different from the reference air pressure to re-store the changed RPM as the reference RPM in the memory.   
     
     
         2 . The air proportional control type combustion device of  claim 1 , further comprising a multi-stage valve for controlling an amount of the mixed air introduced into the blower, and
 an operation of the blower adjusting unit is performed in a state in which the multi-stage valve is fully opened.   
     
     
         3 . The air proportional control type combustion device of  claim 1 , wherein the blower adjusting unit maintains the reference RPM stored in the memory as it is when a difference between the measured value of the air pressure sensor that is read in a state in which the gas valve is closed, and the blower is driven with the reference RPM and the reference air pressure is within a critical range. 
     
     
         4 . A method for adjusting heat amount of an air proportional control type combustion device, the method comprising:
 a process of storing a reference air pressure for each output heat amount of the combustion device and a reference RPM for outputting the reference air pressure in a memory;   a first process of blocking supply of a gas introduced into the blower, driving the blower at the reference RPM, and measuring a pressure of the air introduced into the blower by using an air pressure sensor;   a second process of changing the RPM of the blower until the measured value becomes to the reference air pressure when the measured air pressure value is different from the reference air pressure, to re-store the changed RPM in the memory as the reference RPM; and   a process of controlling the blower at the reference RPM in the process of adjusting the blower to output a heat amount requested by a user.   
     
     
         5 . The method of  claim 4 , wherein the first and second processes of adjusting the blower are performed in a state in which a multi-valve controlling an amount of mixed air introduced to the blower is fully opened. 
     
     
         6 . The method of  claim 4 , wherein when a difference between the measured value in the first process of adjusting the blower and the reference air pressure is within a critical range, the reference RPM stored in the memory is maintained as it is, and the second process of adjusting the blower is not performed.