WO2012134019A1 - Apparatus for monitoring air/gas proportion control in gas boiler and method for controlling same - Google Patents

Apparatus for monitoring air/gas proportion control in gas boiler and method for controlling same Download PDF

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Publication number
WO2012134019A1
WO2012134019A1 PCT/KR2011/008607 KR2011008607W WO2012134019A1 WO 2012134019 A1 WO2012134019 A1 WO 2012134019A1 KR 2011008607 W KR2011008607 W KR 2011008607W WO 2012134019 A1 WO2012134019 A1 WO 2012134019A1
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Prior art keywords
gas
microcomputer
driving current
pulse width
boiler
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PCT/KR2011/008607
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French (fr)
Korean (ko)
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김시환
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주식회사 경동원
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Publication of WO2012134019A1 publication Critical patent/WO2012134019A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel

Definitions

  • the present invention relates to an air gas proportional control monitoring apparatus and a control method of a gas boiler, and more particularly, when a failure occurs in a gas proportional control circuit or a microcomputer controlling the gas proportional control detects a malfunction and displays an error message.
  • the present invention relates to an air gas proportional control monitoring apparatus and a method of a gas boiler.
  • a gas boiler is configured to burn a mixed gas mixed with air and gas to heat direct water to perform heating. At this time, the mixing ratio of the gas in the mixed gas is directly related to the amount of heat during combustion.
  • the gas boiler increases the amount of opening of the valve controlling the gas supply so that the gas is mixed at a higher rate.
  • FIG. 1 is a circuit diagram of a valve control apparatus of a conventional boiler.
  • a valve control apparatus of a conventional boiler includes a smoothing part 2 that receives a pulse width modulation signal PWM of a microcomputer 1 and smoothes the signal of the smoothing part 2.
  • the comparator 3 which compares the signal input to the sub-input terminal and outputs the result, and controls the amount of current according to the output signal of the comparator 3 to adjust the opening degree of the gas valve 6.
  • the valve drive unit 4 and the feedback unit 5 which feeds back the voltage according to the amount of current flowing through the valve drive unit 4 to the negative input terminal of the comparison unit 3.
  • the microcomputer 1 outputs a pulse width modulated signal PWM, in which the pulse width of the output signal is adjusted according to the temperature control of the boiler.
  • the pulse width modulated signal PWM is smoothed in the smoothing part 2 including the resistors R21 and R22 and the capacitor C21, and the signal smoothed in the smoothing part 2 is applied to the positive part of the comparator 3. It is input to the input terminal (+).
  • a voltage corresponding to the amount of current of the valve driving unit 4 is input to the negative input terminal (-) of the comparison unit 3 through the feedback unit 5, and is connected to the positive input terminal (+) and the negative input terminal (-). The difference between the input voltage is amplified and output.
  • the output signal of the comparator 3 is input to the valve driver 4 to determine the amount of current according to the magnitude of the output signal.
  • the valve driver 4 includes a resistor R41 connected in series between the output terminal of the comparator 3 and the base terminal of the bipolar transistor BT41, the collector terminal of the bipolar transistor BT41, and the power supply voltage VCC.
  • a base terminal is connected to the resistors R42 and R43 connected in series and a contact point of the resistors R42 and R43, and the power supply voltage VCC is connected to the collector terminal to open the gas valve with a current flowing through the emitter. It comprises a bipolar transistor BT42 to adjust.
  • the turn-on degree of the bipolar transistor BT41 is increased to increase the collector-emitter current.
  • the bipolar transistor BT41 is increased. Decreases the turn-on, resulting in a decrease in collector-emitter current.
  • the control of the collector-emitter current controls the voltage applied to the two resistors R42 and R43, and the turn-on degree of the bipolar transistor BT42 connected to the base of the two resistors R42 and R43 is Controlled.
  • control current amount for controlling the gas valve 6 can be varied, the current amount is fed back by the feedback unit 5 is input to the negative input terminal (-) of the comparison unit (3).
  • the feedback unit 5 includes a plurality of resistors R51, R52, and R53 and a capacitor C51 to supply a voltage according to a current for controlling the opening degree of the gas valve 6 to a negative input terminal of the comparison unit 3. It will be entered in (-).
  • the conventional gas valve control device of the boiler can adjust the opening degree of the gas valve 6 by using pulse width modulation.
  • the voltages of the contacts of the two resistors R42 and R43 are increased, thereby driving current is increased.
  • the excessively supplied state continues, which is independent of the pulse width modulated signal PWM, so that the open state of the gas valve 6 is maintained at the maximum state.
  • An object of the present invention is to provide an apparatus and a method for monitoring and controlling a gas proportional air of a gas boiler.
  • Air gas proportional control monitoring device of the present invention for solving the above problems, the gas valve of the gas boiler to control the opening degree of the gas valve by comparing the smoothed pulse width modulation signal and the drive current for driving the gas valve
  • the control apparatus further comprises an overcurrent detector for inputting a voltage corresponding to the driving current into the microcomputer to recognize whether the driving current is abnormal.
  • a method for controlling the air gas proportional control of a gas boiler includes: a gas valve control method of a gas boiler in which a comparison unit compares a pulse width modulation signal of a microcomputer with a driving current fed back to control the opening amount of a gas valve Recognizing the voltage value according to the drive current to the microcomputer, b) The voltage value according to the drive current is set by comparing the voltage value according to the drive current with respect to the pulse width modulation signal in the microcomputer If more than the value, it further comprises the step of determining as an error.
  • an air gas proportional control monitoring device and a control method of a gas boiler have an abnormality in an internal circuit or a microcomputer when excessive driving current flows in comparison with a pulse width modulated signal by continuously receiving the voltage of the driving current from a microcomputer.
  • FIG. 1 is a circuit diagram of a gas valve control apparatus of a conventional gas boiler.
  • FIG. 2 is a circuit diagram of an air gas proportional control monitoring apparatus for a gas boiler according to a preferred embodiment of the present invention.
  • microcomputer 20 smooth part
  • FIG. 2 is a circuit diagram of an air gas proportional control monitoring apparatus for a gas boiler according to a preferred embodiment of the present invention.
  • the apparatus for monitoring the air gas proportional control of a gas boiler includes a smoothing unit 20 that receives and smoothes a pulse width modulated signal PWM of the microcomputer 10.
  • the comparator 30 receives the signal from the smoothing unit 20 at the positive input terminal and compares the signal with the signal input at the negative input terminal and outputs the result, and controls the amount of current according to the output signal of the comparator 30.
  • the microcomputer 10 outputs a pulse width modulation signal PWM adjusted by adjusting the pulse width of the output signal according to the temperature control of the boiler.
  • the pulse width modulated signal PWM is smoothed in the smoothing unit 20 including the resistors R21 and R22 and the capacitor C21, and the smoothed signal is input to the positive input terminal (+) of the comparator 30. do.
  • a voltage corresponding to the driving current amount of the valve driving unit 40 is input to the negative input terminal (-) of the comparison unit 30 through the feedback unit 50, and is input to the positive input terminal (+) and the negative input terminal (-).
  • the difference between the input voltage is amplified and output.
  • the output signal of the comparison unit 30 is input to the valve driver 40 to determine the amount of current according to the magnitude of the output signal.
  • the amount of output current of the comparator 30 is large, the turn-on degree of the bipolar transistor BT41 is increased to increase the collector-emitter current.
  • the bipolar transistor BT41 is increased. Decreases the turn-on, resulting in a decrease in collector-emitter current.
  • the control of the collector-emitter current controls the voltages of the contacts of the two resistors R42 and R43 so that the degree of turn-on of the bipolar transistor BT42 whose base is connected to the contacts of the two resistors R42 and R43 is controlled. do.
  • the control of the turn-on degree of the bipolar transistor BT42 directly controls the driving current for driving the gas valve 70, and the opening degree of the gas valve 70 is determined by the driving current amount.
  • the driving current is input to the negative input terminal ( ⁇ ) of the comparison unit 30 through the feedback unit 50 to adjust the output of the comparison unit 30.
  • the driving current flows excessively, and the gas valve 70 is driven by the excessive driving current.
  • the opening degree of is maximum.
  • the voltage input to the negative input terminal (-) of the comparison unit 30 is input to the input terminal of the microcomputer 10 through the overcurrent detection unit 60, the microcomputer 10 is When an excessive voltage is detected in comparison with the pulse width modulation signal PWM, an error is displayed through the display unit (not shown), and the operation of the gas boiler is stopped.
  • the overcurrent detection unit 60 is connected between the resistor R61 connected in series between the negative input terminal ( ⁇ ) of the comparator 30 and the input terminal of the microcomputer 10, and between the input terminal of the microcomputer 10 and the ground. It may be configured to include a capacitor (C61) connected.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

The present invention relates to an apparatus for monitoring air/gas proportion control in a gas boiler and to a method for controlling same, and more particularly, to a gas valve control circuit in a gas boiler for controlling the openness of a gas valve by comparing a smoothed pulse width modulation signal, further comprising an overcurrent detection unit for inputting a voltage, according to a driving current, into a microcomputer so that the microcomputer recognizes the presence/absence of irregularities. The present invention can effectively prevent unnecessary consumption of gas, environmental pollution, and harm to human health due to the discharge of exhaust gas containing excessive carbon dioxide from incomplete combustion, by notifying to the outside an error in the pulse width modulation signal in a driving circuit or the microcomputer, when the driving current voltage that is continuously feedbacked into the microcomputer is compared to the pulse width modulation signal and results in an excessive driving current.

Description

가스보일러의 공기 가스 비례제어 감시장치 및 제어방법Air gas proportional control monitoring device and control method of gas boiler
본 발명은 가스보일러의 공기 가스 비례제어 감시장치 및 제어방법에 관한 것으로, 보다 상세하게는 가스 비례제어 회로에 고장이 발생한 경우 또는 이를 제어하는 마이크로 컴퓨터가 오동작하는 것을 감지하여 오류 메시지를 표시할 수 있는 가스보일러의 공기 가스 비례제어 감시장치 및 방법에 관한 것이다.The present invention relates to an air gas proportional control monitoring apparatus and a control method of a gas boiler, and more particularly, when a failure occurs in a gas proportional control circuit or a microcomputer controlling the gas proportional control detects a malfunction and displays an error message. The present invention relates to an air gas proportional control monitoring apparatus and a method of a gas boiler.
일반적으로 가스보일러는 공기와 가스를 혼합한 혼합가스를 연소시켜 직수를 가열하여 난방을 수행하도록 구성되어 있다. 이때 혼합가스에서 가스의 혼합비는 연소시 열량과 직접적인 관계가 있다.In general, a gas boiler is configured to burn a mixed gas mixed with air and gas to heat direct water to perform heating. At this time, the mixing ratio of the gas in the mixed gas is directly related to the amount of heat during combustion.
즉 가스보일러는 설정온도와 현재 온도의 차이가 상대적으로 더 클때 가스의 공급을 제어하는 밸브의 개도량을 늘려 가스가 더 많은 비율로 혼합되도록 한다.In other words, when the difference between the set temperature and the present temperature is relatively larger, the gas boiler increases the amount of opening of the valve controlling the gas supply so that the gas is mixed at a higher rate.
이와 같은 밸브의 제어회로에서 사용되는 소자인 트랜지스터 및 회로부품에 단락 및 단선 등의 이상이 발생하는 경우, 과도한 가스가 연소실로 공급되어지며, 불완전연소가 발생하며 배기가스에 과다한 이산화탄소가 포함되어 배출되거나, 연소를 위해 착화를 수행할 때 과도한 가스로 인하여 폭발점화 하는 등의 문제가 발생하게 된다. 또한 마이크로 컴퓨터가 오동작하여 원하는 가스보다 더 많은 가스를 연소실로 공급되어 불완전연소가 발생하게 된다.When an abnormality such as a short circuit or a disconnection occurs in a transistor or a circuit component which is an element used in the control circuit of such a valve, excessive gas is supplied to the combustion chamber, incomplete combustion occurs, and exhaust gas contains excessive carbon dioxide. Or when the ignition is performed for combustion, a problem such as explosion ignition due to excessive gas occurs. In addition, the microcomputer malfunctions and supplies more gas than the desired gas to the combustion chamber, resulting in incomplete combustion.
도 1은 종래 보일러의 밸브 제어장치의 회로도이다.1 is a circuit diagram of a valve control apparatus of a conventional boiler.
도 1을 참조하면 종래 보일러의 밸브 제어장치는, 마이크로 컴퓨터(1)의 펄스폭변조신호(PWM)를 입력받아 평활하는 평활부(2)와, 상기 평활부(2)의 신호를 정입력단자에 입력받아 부입력단자에 입력된 신호와 비교하여 그 결과를 출력하는 비교부(3)와, 상기 비교부(3)의 출력신호에 따라 전류량을 제어하여 가스밸브(6)의 개도를 조절하는 밸브구동부(4)와, 상기 밸브구동부(4)에 흐르는 전류량에 따른 전압을 상기 비교부(3)의 부입력단자로 피드백하는 피드백부(5)로 구성된다.Referring to FIG. 1, a valve control apparatus of a conventional boiler includes a smoothing part 2 that receives a pulse width modulation signal PWM of a microcomputer 1 and smoothes the signal of the smoothing part 2. The comparator 3 which compares the signal input to the sub-input terminal and outputs the result, and controls the amount of current according to the output signal of the comparator 3 to adjust the opening degree of the gas valve 6. The valve drive unit 4 and the feedback unit 5 which feeds back the voltage according to the amount of current flowing through the valve drive unit 4 to the negative input terminal of the comparison unit 3.
이하 종래 보일러의 밸브 제어장치의 구성과 작용을 보다 상세하게 설명한다.Hereinafter, the configuration and operation of the valve control device of the conventional boiler will be described in more detail.
먼저 마이크로 컴퓨터(1)는 보일러의 온도제어에 따라 출력신호의 펄스폭을 조정한 펄스폭변조신호(PWM)를 출력한다.First, the microcomputer 1 outputs a pulse width modulated signal PWM, in which the pulse width of the output signal is adjusted according to the temperature control of the boiler.
이 펄스폭변조신호(PWM)는 저항(R21,R22)과 커패시터(C21)를 포함하는 평활부(2)에서 평활되어, 그 평활부(2)에서 평활된 신호는 비교부(3)의 정입력단자(+)에 입력된다. The pulse width modulated signal PWM is smoothed in the smoothing part 2 including the resistors R21 and R22 and the capacitor C21, and the signal smoothed in the smoothing part 2 is applied to the positive part of the comparator 3. It is input to the input terminal (+).
상기 비교부(3)의 부입력단자(-)에는 상기 피드백부(5)를 통해 밸브구동부(4)의 전류량에 따른 전압이 입력되어, 정입력단자(+)와 부입력단자(-)에 입력된 전압의 차를 증폭하여 출력한다.A voltage corresponding to the amount of current of the valve driving unit 4 is input to the negative input terminal (-) of the comparison unit 3 through the feedback unit 5, and is connected to the positive input terminal (+) and the negative input terminal (-). The difference between the input voltage is amplified and output.
상기 비교부(3)의 출력신호는 밸브구동부(4)에 입력되어 그 출력신호의 크기에 따른 전류량을 결정하게 된다. The output signal of the comparator 3 is input to the valve driver 4 to determine the amount of current according to the magnitude of the output signal.
상기 밸브구동부(4)는 상기 비교부(3)의 출력단과 바이폴라트랜지스터(BT41)의 베이스단의 사이에 직렬연결된 저항(R41)과, 상기 바이폴라트랜지스터(BT41)의 콜렉터단과 전원전압(VCC)의 사이에 직렬연결된 저항(R42,R43)과, 상기 저항(R42,R43)의 접점에 베이스단이 연결되며 콜렉터단에 상기 전원전압(VCC)이 연결되어 에미터에 흐르는 전류로 가스밸브의 개도를 조정하는 바이폴라트랜지스터(BT42)를 포함하여 구성된다.The valve driver 4 includes a resistor R41 connected in series between the output terminal of the comparator 3 and the base terminal of the bipolar transistor BT41, the collector terminal of the bipolar transistor BT41, and the power supply voltage VCC. A base terminal is connected to the resistors R42 and R43 connected in series and a contact point of the resistors R42 and R43, and the power supply voltage VCC is connected to the collector terminal to open the gas valve with a current flowing through the emitter. It comprises a bipolar transistor BT42 to adjust.
상기 비교부(3)의 출력전류량이 많을 때에는 상기 바이폴라트랜지스터(BT41)의 턴온정도가 커져 콜렉터-에미터 전류는 커지게 되며, 반대로 비교부(3)의 출력전류량이 적을 때 상기 바이폴라트랜지스터(BT41)의 턴온정도가 줄어 콜렉터-에미터 전류가 감소하게 된다.When the amount of output current of the comparator 3 is large, the turn-on degree of the bipolar transistor BT41 is increased to increase the collector-emitter current. On the contrary, when the amount of output current of the comparator 3 is small, the bipolar transistor BT41 is increased. Decreases the turn-on, resulting in a decrease in collector-emitter current.
이와 같은 콜렉터-에미터 전류의 제어는 상기 두 저항(R42,R43)에 인가되는 전압을 제어하며, 그 두 저항(R42,R43)의 접점에 베이스단이 연결된 바이폴라트랜지스터(BT42)의 턴온정도가 제어된다.The control of the collector-emitter current controls the voltage applied to the two resistors R42 and R43, and the turn-on degree of the bipolar transistor BT42 connected to the base of the two resistors R42 and R43 is Controlled.
따라서 가스밸브(6)를 제어하는 제어전류량이 가변될 수 있으며, 그 전류량은 피드백부(5)에 의해 피드백되어 상기 비교부(3)의 부입력단(-)으로 입력되어진다.Therefore, the control current amount for controlling the gas valve 6 can be varied, the current amount is fed back by the feedback unit 5 is input to the negative input terminal (-) of the comparison unit (3).
상기 피드백부(5)는 다수의 저항(R51,R52,R53)과 커패시터(C51)를 포함하여 상기 가스밸브(6)의 개도를 제어하는 전류에 따른 전압을 상기 비교부(3)의 부입력단(-)에 입력하게 된다.The feedback unit 5 includes a plurality of resistors R51, R52, and R53 and a capacitor C51 to supply a voltage according to a current for controlling the opening degree of the gas valve 6 to a negative input terminal of the comparison unit 3. It will be entered in (-).
이와 같은 구성에 의해 종래 보일러의 가스밸브 제어장치는, 펄스폭변조를 이용하여 가스밸브(6)의 개도를 조정할 수 있다. 그러나 상기 설명한 두 바이폴라트랜지스터(BT41,BT42) 각각에 이상이 발생하여 콜렉터와 에미터 사이에서 단락이 발생하는 경우, 상기 두 저항(R42,R43)의 접점의 전압이 증가되며, 이로 인하여 구동전류가 과도하게 공급되는 상태가 지속되며, 이는 펄스폭변조신호(PWM)와는 무관하게 지속되어 가스밸브(6)의 개도상태가 최대상태로 유지된다.With such a configuration, the conventional gas valve control device of the boiler can adjust the opening degree of the gas valve 6 by using pulse width modulation. However, when an error occurs in each of the two bipolar transistors BT41 and BT42 described above and a short circuit occurs between the collector and the emitter, the voltages of the contacts of the two resistors R42 and R43 are increased, thereby driving current is increased. The excessively supplied state continues, which is independent of the pulse width modulated signal PWM, so that the open state of the gas valve 6 is maintained at the maximum state.
따라서 상기 바이폴라트랜지스터(BT41,BT42) 각각에 이상이 있거나, 혹은 두 바이폴라트랜지스터(BT41,BT42)에 모두 이상이 있는 경우 과도한 가스의 공급에 의해 불완전 연소가 발생하며, 가스의 소모량이 증가하고 배기가스에 이산화탄소가 과도하게 포함된 상태로 배기가 이루어지게 되고, 보일러가 연소를 하기 위해 착화를 수행할 때 과다한 가스공급으로 폭발점화하는 현상이 발생할 수 있다. 또한 마이크로 컴퓨터(1)가 오동작으로 인하여 펄스폭 변조신호가 원하는 값 보다 큰 값으로 출력이 될 경우 과도한 가스공급에 의해 불완전 연소가 발생할 수 있다.Therefore, when there is an error in each of the bipolar transistors BT41 and BT42, or when there is an error in both the bipolar transistors BT41 and BT42, incomplete combustion occurs due to excessive gas supply, and the consumption of gas increases and the exhaust gas is increased. Exhaust is made in a state in which carbon dioxide is excessively contained, and when the boiler performs ignition for combustion, an explosion may occur due to excessive gas supply. In addition, when the microcomputer 1 outputs a pulse width modulated signal larger than a desired value due to a malfunction, incomplete combustion may occur due to excessive gas supply.
그러나 종래에는 이와 같은 이상 상태를 검출할 수단이 마련되어 있지 않기 때문에 제어에 오류가 있음을 검출할 수 없는 문제점이 있었다.However, conventionally, since there is no means for detecting such an abnormal state, there is a problem that it is impossible to detect an error in the control.
상기와 같은 문제점을 감안한 본 발명이 해결하고자 하는 과제는, 가스밸브를 구동하는 회로에 이상이 있는 경우나 가스밸브 제어를 위하여 사용하는 마이크로 컴퓨터에 이상이 있는 경우, 이를 검출하여 오류 표시 및 가스보일러의 동작을 정지시킬 수 있는 가스보일러의 공기 가스 비례제어 감시장치 및 제어방법을 제공함에 있다.The problem to be solved by the present invention in consideration of the above problems, if there is an error in the circuit for driving the gas valve or a microcomputer used for gas valve control, it detects this error display and gas boiler An object of the present invention is to provide an apparatus and a method for monitoring and controlling a gas proportional air of a gas boiler.
상기와 같은 과제를 해결하기 위한 본 발명 가스보일러의 공기 가스 비례제어 감시장치는, 평활된 펄스폭변조신호와 가스밸브를 구동하는 구동전류를 비교하여 가스밸브의 개도를 제어하는 가스보일러의 가스밸브 제어장치에 있어서, 상기 구동전류에 따른 전압을 마이크로 컴퓨터로 입력하여 구동전류의 이상유무를 상기 마이크로 컴퓨터에서 인식할 수 있도록 하는 과전류검출부를 더 포함하여 구성된다.Air gas proportional control monitoring device of the present invention for solving the above problems, the gas valve of the gas boiler to control the opening degree of the gas valve by comparing the smoothed pulse width modulation signal and the drive current for driving the gas valve The control apparatus further comprises an overcurrent detector for inputting a voltage corresponding to the driving current into the microcomputer to recognize whether the driving current is abnormal.
본 발명 가스보일러의 공기 가스 비례제어 제어방법은, 비교부에서 마이크로 컴퓨터의 펄스폭변조신호와 피드백되는 구동전류를 비교하여 가스밸브의 개도량을 제어하는 가스보일러의 가스밸브 제어방법에 있어서, a) 상기 구동전류에 따른 전압 값을 마이크로 컴퓨터에 인지시키는 단계와, b) 상기 마이크로 컴퓨터에서 상기 펄스폭변조신호에 대하여 상기 구동전류에 따른 전압 값을 비교하여, 상기 구동전류에 따른 전압 값이 설정 값 이상이면, 오류로 판단하는 단계를 더 포함한다.According to the present invention, a method for controlling the air gas proportional control of a gas boiler includes: a gas valve control method of a gas boiler in which a comparison unit compares a pulse width modulation signal of a microcomputer with a driving current fed back to control the opening amount of a gas valve Recognizing the voltage value according to the drive current to the microcomputer, b) The voltage value according to the drive current is set by comparing the voltage value according to the drive current with respect to the pulse width modulation signal in the microcomputer If more than the value, it further comprises the step of determining as an error.
본 발명 가스보일러의 공기 가스 비례제어 감시장치 및 제어방법은 구동전류의 전압을 마이크로 컴퓨터에서 지속적으로 피드백 받아 펄스폭변조신호와 비교하여 과도한 구동전류가 흐르는 경우, 내부회로 또는 마이크로 컴퓨터에 이상이 있음을 외부에 인지시킴으로써 불필요한 가스의 소모를 방지함과 아울러 불완전 연소에 따른 과도한 이산화탄소가 포함된 배기가스가 배출되어 환경을 오염시키고 인체의 건강을 해치는 것을 방지할 수 있는 효과가 있다.According to the present invention, an air gas proportional control monitoring device and a control method of a gas boiler have an abnormality in an internal circuit or a microcomputer when excessive driving current flows in comparison with a pulse width modulated signal by continuously receiving the voltage of the driving current from a microcomputer. By recognizing the outside to prevent unnecessary gas consumption and exhaust gas containing excessive carbon dioxide due to incomplete combustion is emitted to contaminate the environment and harm the health of the human body.
도 1은 종래 가스보일러의 가스밸브 제어장치의 회로도이다.1 is a circuit diagram of a gas valve control apparatus of a conventional gas boiler.
도 2는 본 발명의 바람직한 실시예에 따른 가스보일러의 공기 가스 비례제어 감시장치의 회로도이다.2 is a circuit diagram of an air gas proportional control monitoring apparatus for a gas boiler according to a preferred embodiment of the present invention.
** 부호의 설명 **** Explanation of Codes **
10:마이크로 컴퓨터 20:평활부10: microcomputer 20: smooth part
30:비교부 40:밸브구동부30: comparison 40: valve drive
50:피드백부 60:과전류검출부50: feedback unit 60: overcurrent detection unit
70:가스밸브70: gas valve
이하, 본 발명의 바람직한 실시예에 따른 가스보일러의 공기 가스 비례제어 감시장치 및 제어방법을 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, an air gas proportional control monitoring apparatus and a control method of a gas boiler according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 2는 본 발명의 바람직한 실시예에 따른 가스보일러의 공기 가스 비례제어 감시장치의 회로도이다.2 is a circuit diagram of an air gas proportional control monitoring apparatus for a gas boiler according to a preferred embodiment of the present invention.
도 2를 참조하면 본 발명의 바람직한 실시예에 따른 가스보일러의 공기 가스 비례제어 감시장치는, 마이크로 컴퓨터(10)의 펄스폭변조신호(PWM)를 입력받아 평활하는 평활부(20)와, 상기 평활부(20)의 신호를 정입력단자에 입력받아 부입력단자에 입력된 신호와 비교하여 그 결과를 출력하는 비교부(30)와, 상기 비교부(30)의 출력신호에 따라 전류량을 제어하여 가스밸브(70)의 개도를 조절하는 밸브구동부(40)와, 상기 밸브구동부(40)에 흐르는 전류량에 따른 전압을 상기 비교부(3)의 부입력단자로 피드백하는 피드백부(50)와, 상기 피드백부(50)의 전압을 평활하여 상기 마이크로 컴퓨터(10)의 입력단으로 입력하여, 상기 마이크로 컴퓨터(10)에서 상기 펄스폭변조신호(PWM)와 비교하여 오류를 검출하도록 하는 과전류검출부(60)로 구성된다.Referring to FIG. 2, the apparatus for monitoring the air gas proportional control of a gas boiler according to an exemplary embodiment of the present invention includes a smoothing unit 20 that receives and smoothes a pulse width modulated signal PWM of the microcomputer 10. The comparator 30 receives the signal from the smoothing unit 20 at the positive input terminal and compares the signal with the signal input at the negative input terminal and outputs the result, and controls the amount of current according to the output signal of the comparator 30. A valve driver 40 for adjusting the opening degree of the gas valve 70, a feedback part 50 for feeding back a voltage according to the amount of current flowing through the valve driver 40 to the negative input terminal of the comparator 3; And an overcurrent detector for smoothing the voltage of the feedback unit 50 and inputting the input terminal to the input terminal of the microcomputer 10 so as to detect an error by comparing the pulse width modulated signal PWM with the microcomputer 10. 60).
이하 본 발명의 바람직한 실시예에 따른 가스보일러의 공기 가스 비례제어 감지장치의 구성과 작용을 보다 상세하게 설명한다.Hereinafter, the configuration and operation of the air gas proportional control detection device of the gas boiler according to the preferred embodiment of the present invention will be described in detail.
먼저 마이크로 컴퓨터(10)는 보일러의 온도제어에 따라 출력신호의 펄스폭을 조정한 펄스폭변조신호(PWM)를 출력한다. 펄스폭변조신호(PWM)는 저항(R21, R22)과 커패시터(C21)를 포함하는 평활부(20)에서 평활되며, 그 평활된 신호는 비교부(30)의 정입력단자(+)에 입력된다. First, the microcomputer 10 outputs a pulse width modulation signal PWM adjusted by adjusting the pulse width of the output signal according to the temperature control of the boiler. The pulse width modulated signal PWM is smoothed in the smoothing unit 20 including the resistors R21 and R22 and the capacitor C21, and the smoothed signal is input to the positive input terminal (+) of the comparator 30. do.
상기 비교부(30)의 부입력단자(-)에는 피드백부(50)를 통해 밸브구동부(40)의 구동전류량에 따른 전압이 입력되며, 정입력단자(+)와 부입력단자(-)에 입력된 전압의 차를 증폭하여 출력한다.A voltage corresponding to the driving current amount of the valve driving unit 40 is input to the negative input terminal (-) of the comparison unit 30 through the feedback unit 50, and is input to the positive input terminal (+) and the negative input terminal (-). The difference between the input voltage is amplified and output.
상기 비교부(30)의 출력신호는 밸브구동부(40)에 입력되어 그 출력신호의 크기에 따른 전류량을 결정하게 된다. 상기 비교부(30)의 출력전류량이 많을 때에는 상기 바이폴라트랜지스터(BT41)의 턴온정도가 커져 콜렉터-에미터 전류는 커지게 되며, 반대로 비교부(30)의 출력전류량이 적을 때 상기 바이폴라트랜지스터(BT41)의 턴온정도가 줄어 콜렉터-에미터 전류가 감소하게 된다.The output signal of the comparison unit 30 is input to the valve driver 40 to determine the amount of current according to the magnitude of the output signal. When the amount of output current of the comparator 30 is large, the turn-on degree of the bipolar transistor BT41 is increased to increase the collector-emitter current. On the contrary, when the amount of output current of the comparator 30 is small, the bipolar transistor BT41 is increased. Decreases the turn-on, resulting in a decrease in collector-emitter current.
이와 같은 콜렉터-에미터 전류의 제어는 두 저항(R42,R43)의 접점의 전압을 제어하게 되어, 베이스단이 두 저항(R42,R43)의 접점에 연결된 바이폴라트랜지스터(BT42)의 턴온정도가 제어된다.The control of the collector-emitter current controls the voltages of the contacts of the two resistors R42 and R43 so that the degree of turn-on of the bipolar transistor BT42 whose base is connected to the contacts of the two resistors R42 and R43 is controlled. do.
상기 바이폴라트랜지스터(BT42)의 턴온정도의 제어는 가스밸브(70)를 구동하는 구동전류를 직접 제어하게 되며, 그 구동전류량에 의해 가스밸브(70)의 개도가 결정된다.The control of the turn-on degree of the bipolar transistor BT42 directly controls the driving current for driving the gas valve 70, and the opening degree of the gas valve 70 is determined by the driving current amount.
이와 같은 상태에서 구동전류는 피드백부(50)를 통해 상기 비교부(30)의 부입력단(-)에 입력되어, 그 비교부(30)의 출력을 조정하게 된다. In this state, the driving current is input to the negative input terminal (−) of the comparison unit 30 through the feedback unit 50 to adjust the output of the comparison unit 30.
상기와 같은 동작 중에 두 바이폴라트랜지스터(BT41,BT42) 중 하나 또는 모든 바이폴라트랜지스터에 이상이 발생하여 콜렉터-에미터가 단락되면 구동전류가 과도하게 흐르게 되며, 이 과도한 구동전류에 의해 가스밸브(70)의 개도는 최대가 된다.If an error occurs in one or all of the bipolar transistors BT41 and BT42 during the operation as described above and the collector-emitter is shorted, the driving current flows excessively, and the gas valve 70 is driven by the excessive driving current. The opening degree of is maximum.
이처럼 구동회로측에 이상이 발생한 경우 과도한 구동전류가 흐르게 되며, 상기 마이크로 컴퓨터(10)의 오류에 의해 잘못된 펄스폭변조신호(PWM)가 입력되는 경우에도 과도한 구동전류가 흐를 수 있게 된다.As such, when an abnormality occurs in the driving circuit side, excessive driving current flows, and excessive driving current flows even when an incorrect pulse width modulation signal PWM is input by an error of the microcomputer 10.
이때 상기 펄스폭변조신호(PWM)가 가변되어도 그 구동전류를 변화되지 않으며, 불완전연소가 발생하여 필요이상으로 과도한 가스가 소모되며, 보일러가 연소를 하기 위해 착화를 수행할 때 과다한 가스공급으로 폭발점화하는 현상이 발생할 수 있다.At this time, even if the pulse width modulation signal PWM is varied, the driving current does not change, and incomplete combustion occurs, excessive gas is consumed more than necessary, and when the boiler performs ignition for combustion, it explodes due to excessive gas supply. Ignition may occur.
이와 같은 상태를 방지하기 위하여 상기 비교부(30)의 부입력단(-)에 입력되는 전압은 과전류검출부(60)를 통해 마이크로 컴퓨터(10)의 입력단에 입력되며, 그 마이크로 컴퓨터(10)는 상기 펄스폭변조신호(PWM)와 비교하여 과도한 전압이 검출되면 표시부(도면 미도시)를 통해 오류가 있음을 표시하고, 가스보일러의 동작을 정지시킨다.In order to prevent such a state, the voltage input to the negative input terminal (-) of the comparison unit 30 is input to the input terminal of the microcomputer 10 through the overcurrent detection unit 60, the microcomputer 10 is When an excessive voltage is detected in comparison with the pulse width modulation signal PWM, an error is displayed through the display unit (not shown), and the operation of the gas boiler is stopped.
즉, 마이크로 컴퓨터(10)는 출력한 정상범위의 펄스폭변조신호(PWM)에 비하여 검출되는 구동전류가 과도한 경우, 마이크로 컴퓨터(10) 자체의 출력신호인 펄스폭변조신호(PWM)에 이상이 발생했거나, 가스밸브(70)를 구동하는 회로에 이상이 발생한 것으로 판단하여, 오류 표시 및 가스보일러의 동작을 정지시키게 된다.That is, the microcomputer 10 has an abnormality in the pulse width modulated signal PWM, which is an output signal of the microcomputer 10 itself, when the detected drive current is excessive compared to the pulse width modulated signal PWM in the normal range. It is determined that an error has occurred in the circuit driving the gas valve 70, and the error display and the operation of the gas boiler are stopped.
상기 과전류검출부(60)는 상기 비교부(30)의 부입력단(-)과 마이크로 컴퓨터(10)의 입력단 사이에 직렬접속된 저항(R61)과, 상기 마이크로 컴퓨터(10)의 입력단과 접지 사이에 연결된 커패시터(C61)를 포함하여 구성될 수 있다.The overcurrent detection unit 60 is connected between the resistor R61 connected in series between the negative input terminal (−) of the comparator 30 and the input terminal of the microcomputer 10, and between the input terminal of the microcomputer 10 and the ground. It may be configured to include a capacitor (C61) connected.
전술한 바와 같이 본 발명에 대하여 바람직한 실시예들을 들어 상세히 설명하였지만, 본 발명은 전술한 실시예들에 한정되는 것이 아니고, 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명에 속한다.As described above, preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the above-described embodiments, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible to carry out by this and this also belongs to the present invention.

Claims (5)

  1. 평활된 펄스폭변조신호와 가스밸브를 구동하는 구동전류를 비교하여 가스밸브의 개도를 제어하는 가스보일러의 가스밸브 제어회로에 있어서,In the gas valve control circuit of a gas boiler for controlling the opening degree of the gas valve by comparing the smoothed pulse width modulation signal and the drive current for driving the gas valve,
    상기 구동전류에 따른 전압을 마이크로 컴퓨터로 입력하여 구동전류의 이상유무를 상기 마이크로 컴퓨터에서 인식할 수 있도록 하는 과전류검출부를 더 포함하는 가스보일러의 공기 가스 비례제어 감시장치.And an overcurrent detector for inputting a voltage corresponding to the driving current into a microcomputer to recognize whether an abnormality in driving current is detected by the microcomputer.
  2. 제1항에 있어서,The method of claim 1,
    상기 과전류검출부는,The overcurrent detection unit,
    상기 펄스폭변조신호와 상기 구동전류를 비교하는 비교부에서 상기 구동전류가 피드백입력되는 부입력단과 상기 마이크로 컴퓨터의 입력단을 직렬연결하는 저항; 및A resistor for serially connecting a negative input terminal to which the driving current is fed back and an input terminal of the microcomputer in a comparing unit comparing the pulse width modulation signal and the driving current; And
    상기 마이크로 컴퓨터의 입력단과 접지 사이에 접속된 커패시터를 포함하는 가스보일러의 공기 가스 비례제어 감시장치.And an air gas proportional control monitor of a gas boiler comprising a capacitor connected between the input terminal of the microcomputer and a ground.
  3. 제1항에 있어서,The method of claim 1,
    상기 마이크로 컴퓨터는,The microcomputer,
    상기 구동전류가 과도한 경우 표시부에 알람을 표시함과 아울러 보일러의 운전을 정지시키는 것을 특징으로 하는 가스보일러의 공기 가스 비례제어 감시장치.And an alarm on the display unit when the driving current is excessive, and stopping the operation of the boiler.
  4. 비교부에서 마이크로 컴퓨터의 펄스폭변조신호와 피드백되는 구동전류를 비교하여 가스밸브의 개도량을 제어하는 가스보일러의 가스밸브 제어방법에 있어서,In the gas valve control method of the gas boiler to control the opening amount of the gas valve by comparing the pulse width modulation signal of the microcomputer with the feedback drive current in the comparison unit,
    a) 상기 구동전류에 따른 전압 값을 마이크로 컴퓨터에 인지시키는 단계; 및a) recognizing a voltage value according to the driving current to a microcomputer; And
    b) 상기 마이크로 컴퓨터에서 상기 펄스폭변조신호에 대하여 상기 구동전류에 따른 전압 값을 비교하여, 상기 구동전류에 따른 전압 값이 설정 값 이상이면, 오류로 판단하는 단계를 더 포함하는 가스보일러의 공기 가스 비례제어 제어방법.b) comparing the voltage value according to the driving current with respect to the pulse width modulation signal in the microcomputer, and determining that the voltage value according to the driving current is equal to or greater than a predetermined value, and determining that the error is an error. Gas proportional control control method.
  5. 제4항에 있어서,The method of claim 4, wherein
    상기 b) 단계에서 오류로 판단되면,If it is determined that the error in step b),
    상기 마이크로 컴퓨터가 표시부에 오류가 있음을 표시하고, 가스보일러의 운전을 정지시키는 것을 특징으로 하는 가스보일러의 공기 가스 비례제어 제어방법.And the microcomputer indicates that there is an error in the display unit and stops the operation of the gas boiler.
PCT/KR2011/008607 2011-03-31 2011-11-11 Apparatus for monitoring air/gas proportion control in gas boiler and method for controlling same WO2012134019A1 (en)

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KR10-2011-0029543 2011-03-31
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960001672A (en) * 1994-06-30 1996-01-25 최정우 Boiler's functional device and safety control device
KR0127520B1 (en) * 1994-06-30 1997-12-29 최정우 Alarming apparatus for a boiler
KR0162534B1 (en) * 1995-12-22 1999-01-15 최정우 Transmitting and receiving system of data through wire for boiler and method thereof
KR100253689B1 (en) * 1997-07-28 2000-04-15 윤홍구 Ignition control device of gas appliance
KR100355591B1 (en) * 2000-07-11 2002-10-12 주식회사 경동보일러 A circuit for controlling a gas valve using DC in a boiler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960001672A (en) * 1994-06-30 1996-01-25 최정우 Boiler's functional device and safety control device
KR0127520B1 (en) * 1994-06-30 1997-12-29 최정우 Alarming apparatus for a boiler
KR0162534B1 (en) * 1995-12-22 1999-01-15 최정우 Transmitting and receiving system of data through wire for boiler and method thereof
KR100253689B1 (en) * 1997-07-28 2000-04-15 윤홍구 Ignition control device of gas appliance
KR100355591B1 (en) * 2000-07-11 2002-10-12 주식회사 경동보일러 A circuit for controlling a gas valve using DC in a boiler

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