KR960010794B1 - Economical combustion control method for a fan heater - Google Patents

Economical combustion control method for a fan heater Download PDF

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Publication number
KR960010794B1
KR960010794B1 KR1019930029824A KR930029824A KR960010794B1 KR 960010794 B1 KR960010794 B1 KR 960010794B1 KR 1019930029824 A KR1019930029824 A KR 1019930029824A KR 930029824 A KR930029824 A KR 930029824A KR 960010794 B1 KR960010794 B1 KR 960010794B1
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KR
South Korea
Prior art keywords
electronic pump
driving
fan heater
pump
combustion
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KR1019930029824A
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Korean (ko)
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KR950019380A (en
Inventor
고창현
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대우전자 주식회사
배순훈
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Priority to KR1019930029824A priority Critical patent/KR960010794B1/en
Publication of KR950019380A publication Critical patent/KR950019380A/en
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Publication of KR960010794B1 publication Critical patent/KR960010794B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N1/00Regulating fuel supply
    • F23N1/007Regulating fuel supply using mechanical means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/02Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C5/00Stoves or ranges for liquid fuels
    • F24C5/16Arrangement or mounting of control or safety devices

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Control Of Combustion (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

The method is designed to control combustion of a fan heater by producing heat below the minimum specification of an electronic pump to use the fan heater in confined area efficiently. The method includes the steps of : driving an electronic pump at lowest frequency; turning off the electronic pump after a specified time until a carburetor is stabilized; driving the electronic pump again; and turning off the electronic pump again when gas is filled in the carburetor after driving the electronic pump.

Description

팬히터의 절약연소 제어방법How to control fan combustion

제1도는 본 발명이 적용되는 팬 히터의 제어 블럭도.1 is a control block diagram of a fan heater to which the present invention is applied.

제2도는 제1도의 주요부를 나타내는 상세회로도.FIG. 2 is a detailed circuit diagram showing the main part of FIG.

제3도는 본 발명에 의한 제어 흐름도.3 is a control flowchart according to the present invention.

제4도는 팬 히터 내부의 개략적인 주요 구성도.4 is a schematic main configuration diagram inside the fan heater.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 마이컴 2 : 전원공급부1: microcomputer 2: power supply unit

3 : 키입력부 4 : 표시부3: Key input unit 4: Display unit

5 : 히터구동부 6 : 기화기온도 감지부5: heater driving unit 6: vaporizer temperature detection unit

7 : 전자펌프 구동부 8 : 이그나이터 구동부7: electronic pump driving unit 8: igniter driving unit

9 : 솔레노이드 구동부 10 : 불꽃감지부9: solenoid drive unit 10: flame detection unit

11 : 송풍팬 구동부11: blower fan drive unit

본 발명은 팬히터의 연소 제어방법에 관한 것으로, 특히 전자펌프 최저사양(SPEC) 이하의 열량을 낼 수 있도록 하여 매우 좁은 공간에서도 팬히터를 효율적으로 사용하도록한 팬히터의 절약연소 제어방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control method of a fan heater. More particularly, the present invention relates to a method for controlling the combustion of a fan heater, which enables the fan heater to be efficiently used even in a very narrow space by generating heat of less than the minimum specification of an electronic pump (SPEC).

일반적으로, 팬히터는 제4도와 같은 내부구조를 가지고 있어, 전자펌프(EP)의 구동으로 연료탱크(20)의 연료를 기화기(21)로 강제 이송시키고, 히터(22)에 의해 가열된 기화기(21)에서 기화된 가스는 솔레노이드밸브(24) 및 노즐(25)을 통해 버너(26)로 분사되고, 이 버너(25)의 상부에서는 이그나이터(FR)등의 점화작용으로 불꽃이 생성되어 착화되면 송풍모터(28)의 구동으로 회전되는 송풍팬(29)이 열기를 송풍하여 연소운전을 행하게 된다.In general, the fan heater has an internal structure as shown in FIG. 4, and forcibly transfers the fuel of the fuel tank 20 to the vaporizer 21 by driving the electronic pump EP and heats the vaporizer (heated by the heater 22). The gas vaporized in 21 is injected into the burner 26 through the solenoid valve 24 and the nozzle 25. When the flame is generated and ignited by an ignition action such as an igniter FR in the upper part of the burner 25, The blowing fan 29 which is rotated by the driving of the blowing motor 28 blows the heat to perform the combustion operation.

이와같은 팬히터는 난방출력에 있어, 최소의 행하기 위해서는 상기 전자펌프(EP)를 최저의 주파수(Hz)로 구동시켜 난방을 하여온바, 만약 매우 좁은 공간에서 팬히터를 사용함으로써 최소난방 이하의 출력을 필요로 하는 경우에는 상기 최소출력을 얻기 위해 전자펌프(EP) 및 버너(26)의 사양을 변경해야 했으며, 이 경우 난방최대출력과도 부합되게 해야함으로 기술적으로 난해한 문제점이 있었다.The fan heater has a heating output, and in order to perform the minimum operation, the electronic pump EP is driven at the lowest frequency (Hz) for heating. If the fan heater is used in a very narrow space, the fan heater outputs less than the minimum heating. If necessary, the specifications of the electronic pump (EP) and the burner 26 had to be changed in order to obtain the minimum power, and in this case, there was a technical difficulty because it had to be matched with the maximum heating power.

본 발명은 상기 문제점을 해결하기 위하여 안출된 것으로, 매우 좁은 공간에서 팬히터를 사용할때 전자펌프의 최저출력사양 이하의 열량을 낼수 있도록하여 좁은 공간에서 효율적인 난방이 가능하도록한 팬히터의 절약연소 제어방법을 제공하는 것에 본 발명의 목적이 있다.The present invention has been made to solve the above problems, and when using the fan heater in a very narrow space can produce a heat amount of less than the minimum output specifications of the electronic pump to enable efficient heating control method of the fan heater to enable efficient heating in a narrow space. It is an object of the present invention to provide.

이와같은 목적을 달성하기 위한 본 발명은 좁은 공간에서의 난방용 절약 난방스위치를 구비한 팬히터의 연소제어방법에 있어서, 상기 절약연소명령 키입력시 전자펌프의 구동을 최저의 주파수로 구동시키는 과정과, 상기 전자펌프의 구동후 기화기가 안정될때까지의 소정시간 경과후 전자펌프를 오프시키는 과정과, 전자펌프 오프후 염전류를 검출하여 소화직전의 염전류값이 검출될때 다시 전자펌프를 구동시키는 과정과, 상기 전자펌프구동후 기화기 내부에 가스가 다시 차게되는 소정시간후에 전자펌프를 다시 오프시키는 과정을 구비하여 된 것이다.In order to achieve the above object, the present invention provides a combustion control method for a fan heater equipped with a saving heating switch for heating in a narrow space, the method comprising: driving an electric pump at the lowest frequency when the saving combustion command key is input; Turning off the electronic pump after a predetermined time until the vaporizer is stabilized after driving the electronic pump; and detecting the salt current after turning off the electronic pump, and driving the electronic pump again when the salt current value immediately before fire extinguishing is detected. After the predetermined time when the gas is recharged inside the vaporizer after driving the electronic pump, the electronic pump is turned off again.

이하 첨부된 도면을 통해서 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

제1도는 본 발명이 적용되는 팬히터의 제어블럭도를 나타낸 것으로, 본 발명에 의한 제어방법을 내장 메모리장치(ROM)에 저장하고, 중앙처리장치(CPU) 및 입출력장치 등으로 구성되는 원 칩 마이컴(1)과, 상기 마이컴(1) 및 주변회로에 적정전원을 공급하는 전원공급부(2)와, 다수개의 스위치를 구비하여 운전시작 및 소화, 온도설정등은 물론, 절약연소명령등의 키 입력을 상기 마이컴(1)으로 행하는 키입력부(3)와, 숫자 표시용 LED등을 구비하여 실내온도 및 설정온도등을 표시하여 주는 표시부(4)와, 기화기(21)에 매설된 히터(22)를 구동시켜 운전시작시에는 기화기(21)의 예열을, 연소중에는 기화기(21)가 적정온도를 유지하도록하여 연소상태를 양호하게 하는 히터구동부(5)와, 기화기(21)의 소정부위에 설치된 써미스터(23)를 이용하여 기화기(21)의 온도를 감지하는 기화기온도 감지부(6)와, 연료탱크(20)의 연료를 기화기(21)로 강제 이송시키는 전자펌프 구동부(7)와, 버너(26)상부에 설치되는 이그나이터(27)를 구동시켜 점화작업을 수행하도록 한 이그나이터 구동부(8)와, 노즐(25)을 통해 기화된 연료를 버너(26)로 분사시키거나 차단시키는 솔레노이드 밸브(24)를 구동하는 솔레노이드 구동부(9)와, 버너(26)의 상부에 설치된 플레임로드(FR)를 통해서 불꽃에 흐르는 염(炎)전류를 감지하여 초기 운전시작시에는 착화여부를, 연소중에는 이상소화 및 불량연소(비화,역화)등을 감지하는 불꽃감지부(10)와, 송풍팬(29)을 구동시켜 버너(26)상부의 열기를 외부로 발산시켜주는 송풍팬 구동부(11)로 구성되어 있다.1 is a control block diagram of a fan heater to which the present invention is applied. The control method according to the present invention is stored in an internal memory device (ROM), and is a one-chip microcomputer composed of a central processing unit (CPU) and an input / output device. (1), a power supply unit (2) for supplying proper power to the microcomputer (1) and peripheral circuits, and a plurality of switches to start operation and extinguishment, set temperature, etc. A key input unit 3 for performing a microcomputer 1, a display unit 4 including a LED display for displaying a number, and displaying a room temperature and a set temperature lamp, and a heater 22 embedded in the vaporizer 21. And the heater drive unit 5 and a predetermined portion of the carburetor 21 for preheating the carburetor 21 at the start of operation and for maintaining the combustion state by maintaining the proper temperature during the combustion. Sensing the temperature of the vaporizer 21 using the thermistor 23 The igniter is driven by driving the carburetor temperature sensing unit 6, an electronic pump driving unit 7 for forcibly transferring fuel from the fuel tank 20 to the carburetor 21, and an igniter 27 installed above the burner 26. An igniter drive 8 for performing the operation, a solenoid drive 9 for driving a solenoid valve 24 for injecting or blocking vaporized fuel through the nozzle 25 to the burner 26, and a burner 26 Flame current is detected through flame rod (FR) installed on the top of flame) to detect ignition at the beginning of operation, and flame detection to detect abnormal extinguishing and poor combustion (fire and backfire) during combustion. The blower fan drive part 11 and the blower fan 29 drive the blower fan 29 to dissipate heat from the upper portion of the burner 26 to the outside.

제2도는 본 발명이 적용되는 제1도의 주요부분을 상세하게 나타낸 회로도로써, 키입력부(2)에는 절약연소 스위치(SW)가 마련되어 좁은 공간에서 효율적으로 난방을 수행하고자 할때 사용자가 온하여 그 키입력이 마이컴(1)의 입력포트(PI1)에 입력되면 마이컴(1)은 절약연소제어를 수행한다.FIG. 2 is a circuit diagram showing in detail the main part of FIG. 1 to which the present invention is applied. In the key input unit 2, an eco-combustion switch SW is provided so that the user turns on when the user wants to efficiently heat in a narrow space. When a key input is input to the input port PI1 of the microcomputer 1, the microcomputer 1 performs the saving combustion control.

전자펌프 구동부(7)는 전자펌프(EP), 릴레이(RY), 포토커플러(PC) 및 인버터(IV1)(IV2)로 구성되어, 마이컴(1)이 포트(PO1)로 하이신호를 출력하면 릴레이(RY)가 통전되어 소정전압(DC 24V)이 전자펌프(EP)에 인가되고 동시에 마이컴(1)이 포트(PO2)로 소정의 주파수에 다른 펄스신호를 출력하면 포토커플러(PC)가 동작되고 전자펌프(EP)는 구동된다. 이때 마이컴(1)의 포트(PO)가 동작되고 전자펌프(EP)는 구동된다. 이때 마이컴(1)의 포트(PO2)로 출력되는 펄스의 주파수에 의해 열량이 결정되며, 최저주파수는 5.6Hz(약연소), 최대주파수는 28.4Hz(강연소)등이다.The electromagnetic pump driver 7 is composed of an electromagnetic pump EP, a relay RY, a photocoupler PC, and an inverter IV1 and IV2. When the microcomputer 1 outputs a high signal to the port PO1, When the relay RY is energized and the predetermined voltage DC 24V is applied to the electronic pump EP and the microcomputer 1 outputs another pulse signal at a predetermined frequency to the port PO2, the photocoupler PC operates. And the electronic pump EP is driven. At this time, the port PO of the microcomputer 1 is operated and the electronic pump EP is driven. At this time, the amount of heat is determined by the frequency of the pulse output to the port (PO2) of the microcomputer 1, the minimum frequency is 5.6Hz (weak combustion), the maximum frequency is 28.4Hz (steel combustion) and the like.

또한, 불꽃감지부(10)는, 프레임로드(FR)의 일단에는 저항(R2)과 저항(R3)에 의해 일정직류전압(24V)이 분압되어 저항(R4)을 통해 인가되도록 접속하고, 상기 플레임로드(FR)의 접지단이 저항(R5∼R7) 및 콘덴서(C1)를 통해 마이컴(1)의 입력포트(PI2)에 접속되도록 구성되어, 착화시 불꽃이 플레임로드(FR)에 존재하면 염전류가 흐르게 되고, 이 염전류는 불꽃의 크기에 따라 일정한 차이를 가지게 된다. 이때 염전류는 저항(R5)과 저항(R6)에 의해 전압값으로 변환되고 저항(R7)과 콘덴서(C1)를 통해 마이컴(1)의 입력포트(PI2)에 소정전압(0V∼5V)으로 입력된다. 따라서, 상기 마이컴(1)은 입력포트(PI2)로 입력되는 값을 읽어들어 염전류의 값을 인식하게 되는데 염전류가 약 2.5㎂ 이하가 감지되면 불꽃이 소멸된 것으로 인식되게 된다.In addition, the flame detection unit 10 is connected to one end of the frame rod FR such that the constant DC voltage 24V is divided by the resistor R2 and the resistor R3 and applied through the resistor R4. The ground terminal of the flame rod FR is configured to be connected to the input port PI2 of the microcomputer 1 through the resistors R5 to R7 and the condenser C1. Salt current flows, and the salt current has a constant difference depending on the size of the flame. At this time, the salt current is converted into a voltage value by the resistors R5 and R6, and the predetermined voltage (0V to 5V) is input to the input port PI2 of the microcomputer 1 through the resistor R7 and the capacitor C1. Is entered. Therefore, the microcomputer 1 reads the value input to the input port PI2 to recognize the value of the salt current. When the salt current is about 2.5 mA or less, the flame is extinguished.

상기와 같이 구성시켜서된 본 발명의 작용 및 효과를 제3도의 흐름도를 참조하여 설명된다.The operation and effects of the present invention configured as described above will be described with reference to the flowchart of FIG.

우선, 전원공급부(2)를 통하여 전원이 공급되면, 마이컴(1)은 키입력부(3)를 통해 입력되는 키명령을 검출(S1단계)한다. 여기서 절약연소 스위치(SW)가 온되어 절약연소명령이 입력되면, 초기 예열, 점화 및 착화과정을 수행하고 통상의 연소제어에 돌입하던 마이컴(1)은 출력포트(PO2)로 최저주파수의 펄스신호를 출력하여 전자펌프(EP)의 출력을 최소(S2단계)로 하여준다. 이때 소정의 시간(1분), 곧 기화기(26)가 안정될 수 있는 시간을 두어 이시간이 경과(S3단계)하면 출력포트(PO2)로의 출력을 차단하여 전자펌프(EP)를 오프(S4단계)시킨다. 이때 전자펌프(EP)가 오프되더라도 기화기(26)내부에 차있던 연료가스에 의해 가스는 일정시간(20~30초) 유지된다. 따라서, 마이컴(1)은 불꽃감지부(10)를 통해 입력되는 염전류의 값을 검출(S5단계)하여 이 염전류가 불꽃이 소멸되기 직전의 값인 2.5㎂ 이하가 검출되면, 다시 전자펌프구동부(7)로 전자펌프(EP)최소출력 주파수펄스신호를 출력하여 전자펌프(EP)를 구동(S6단계)시킨다.First, when power is supplied through the power supply unit 2, the microcomputer 1 detects a key command input through the key input unit 3 (step S1). Here, when the eco-combustion switch SW is turned on and the eco-combustion command is input, the microcomputer 1 which performs initial preheating, ignition and ignition processes and enters the normal combustion control is a pulse signal of the lowest frequency to the output port PO2. The output of the electronic pump (EP) to the minimum (step S2). At this time, a predetermined time (1 minute), the time to allow the vaporizer 26 is stabilized, and when this time passes (step S3), the output to the output port (PO2) is cut off to turn off the electronic pump (EP) (S4 Step). At this time, even if the electronic pump EP is turned off, the gas is maintained for a predetermined time (20 to 30 seconds) by the fuel gas filled in the vaporizer 26. Therefore, the microcomputer 1 detects the value of the salt current input through the flame detector 10 (step S5), and when the salt current detects 2.5 mA or less, which is a value immediately before the flame is extinguished, the electronic pump driving unit again. The electronic pump EP outputs the minimum output frequency pulse signal (7) to drive the electronic pump EP (step S6).

이렇게 해서 다시 연료가 기화기(21)내부에 차게되고 기화되어 버너(26)로 이송되는 과정에서 소정시간(20초) 경과(S7단계)후에 다시 전자펌프(EP)를 오프시켜 상기 기화기(21)내에 투입된 가스로만 연소되는 것이다. 이러한 것을 계속 반복 제어함으로써 유효열량은 최소열량(약 1600Kca1/h)보다 적어지게 된다.In this way, the fuel is filled in the carburetor 21 again, the evaporator 21 is turned off again after a predetermined time (20 seconds) (S7 step) in the process of being vaporized and transported to the burner 26. It is only burned by the gas put into it. By repeatedly controlling this, the effective heat amount becomes smaller than the minimum heat amount (about 1600 Kca1 / h).

이상에서와 같이 본 발명은 좁은 실내에서 팬히터를 사용하고자 할때 최적의 난방효율에 따른 쾌적한 실내 분위기를 연출할 수 있는 유용한 발명이다.As described above, the present invention is a useful invention that can produce a comfortable indoor atmosphere according to the optimum heating efficiency when using a fan heater in a narrow room.

Claims (1)

좁은 공간에서의 난방용 절약난방스위치를 구비한 팬히터의 연소제어방법에 있어서, 상기 절약연소명령 키입력시 전자펌프의 구동을 최저의 주파수로 구동시키는 과정과, 상기 전자펌프의 구동후 기화기가 안정될때까지의 소정시간 경과후 전자펌프를 오프시키는 과정과, 전자펌프 오프후 염전후를 검출하여 소화직전의 염전류값이 검출될때 다시 전자펌프를 구동시키는 과정과, 상기 전자펌프구동후 기화기 내부에 가스가 다시 차게되는 소정시간후에 전자펌프를 다시 오프시키는 과정을 구비하여 된 것을 특징으로 하는 팬히터의 절약연소 제어방법.A combustion control method of a fan heater having a heating switch for heating in a narrow space, the process of driving an electric pump at the lowest frequency at the time of the key for saving combustion command, and when the vaporizer is stabilized after the electric pump is driven. A process of turning off the electronic pump after a predetermined time until the detection, after detecting the salt discharge after the electronic pump is turned off, and driving the electronic pump again when the salt current value immediately before fire extinguishing, and the gas inside the vaporizer after driving the electronic pump. And a process of turning off the electronic pump again after a predetermined time when the air is cooled again.
KR1019930029824A 1993-12-27 1993-12-27 Economical combustion control method for a fan heater KR960010794B1 (en)

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