KR100254800B1 - Combustion control method of gas boiler - Google Patents

Combustion control method of gas boiler Download PDF

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KR100254800B1
KR100254800B1 KR1019970058747A KR19970058747A KR100254800B1 KR 100254800 B1 KR100254800 B1 KR 100254800B1 KR 1019970058747 A KR1019970058747 A KR 1019970058747A KR 19970058747 A KR19970058747 A KR 19970058747A KR 100254800 B1 KR100254800 B1 KR 100254800B1
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South Korea
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temperature
heating
gas
heating water
boiler
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KR1019970058747A
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Korean (ko)
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KR19990038873A (en
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박재경
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전주범
대우전자주식회사
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors

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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)
  • Control Of Combustion (AREA)

Abstract

PURPOSE: A combustion control method of a gas boiler is provided to quickly heat through the boiler and to save unnecessary wasted energy by detecting temperatures of heating water and returning water and controlling a gas combustion state in a burner. CONSTITUTION: In finishing an igniting process, an initial combustion is performed at a specific gas amount. A microcomputer measures a temperature of heating water with a heating temperature sensor and a temperature change rate. The microcomputer performs the combustion process with a maximum gas amount and changes a rotating speed of a circulating pump according to the heating temperature when the temperature change rate and the temperature of the heating water are under specific values. The microcomputer performs the combustion process by maintaining the specific gas amount when the temperature change rate is over the specific value. The microcomputer measures a temperature of returning water with a returning water temperature sensor. A boiler is turned off when a difference between the temperature of the heating water and the temperature of the returning water is over an overheating range or the temperature of the heating water is the overheating temperature. Otherwise, a normal proportional control is performed. The circulating pump is rotated at high speed when the temperature of the heating water is over 65deg.C. Otherwise, the circulating pump is rotated at intermediate speed.

Description

가스보일러의 연소제어방법Combustion Control Method of Gas Boiler

본 발명은 가스보일러의 연소제어방법에 관한 것으로서, 더욱 구체적으로는 한 쌍의 온도센서를 사용하여 제어를 수행하는 보일러에서 버너에서의 가스연소상태를 난방수 및 환수의 온도를 감지하고 제어하여 보일러의 급속난방 및 불필요하게 낭비되는 에너지를 절약할 수 있는 가스보일러의 연소제어방법에 관한 것이다.The present invention relates to a combustion control method of a gas boiler, and more particularly, to detect and control a gas combustion state in a burner in a boiler in which a pair of temperature sensors are used to control the temperature of heating water and return water. The present invention relates to a combustion control method of a gas boiler capable of saving rapid heating and unnecessary waste of energy.

가스보일러는 청정연료인 가스를 사용함으로서 공해발생요인이 감소하고 또한 취급상의 용이함으로 인하여 사용이 점차 증가하고 있다. 이러한 가스보일러는 LPG 또는 LNG를 사용하고 있으며, 버너에서 연료를 연소시켜서 발생되는 고온의 열을 사용하여 저온의 직수를 고온의 난방수로 변환시킨 후에 실내에 설치된 배관을 통하여 순환시킴으로서 난방을 수행하고 있다. 또한 직수를 고온으로 승온한 후에 부엌이나 화장실에 공급하여 온수를 사용하도록 되어 있다.Gas boilers are increasingly used due to the reduction of pollution factors and ease of handling by using clean fuel gas. These gas boilers use LPG or LNG, and use the high temperature heat generated by burning fuel in the burner to convert low temperature direct water into high temperature heating water and then circulate through the pipe installed in the room to perform heating. have. In addition, the hot water is heated to a high temperature and then supplied to the kitchen or toilet to use hot water.

도 1은 종래 사용되는 가스보일러의 일실시예로서, 작동상태를 간단히 설명하면 다음과 같다. 사용자에 의하여 보일러가 작동되면 배기팬(15)이 소정시간동안 작동되어서 연소실 내부와 배기연도 내부에 잔류하던 유해가스를 완전히 배출시키는 프리-퍼지(pre-purge)행정이 수행된다. 프리-퍼지행정이 종료된 후에 연료가스(LPG 또는 LNG)는 파이프를 통하여 가스밸브(1)를 통과하면서 소정압력으로 조정된 후에 버너(5)에 공급된다. 연료가 공급되는 상태에서 제어패널(3)에 내장된 마이컴(도 2의 30)으로부터의 제어신호에 따라서 발생된 고전압이 이그나이터(7)로부터 방전을 일으키고 가스에 착화되어서 연소가 시작된다.Figure 1 is an embodiment of a conventionally used gas boiler, briefly describe the operating state as follows. When the boiler is operated by the user, the exhaust fan 15 is operated for a predetermined time to perform a pre-purge stroke to completely discharge the harmful gas remaining in the combustion chamber and the exhaust flue. After the pre-purge stroke is completed, the fuel gas LPG or LNG is supplied to the burner 5 after being adjusted to a predetermined pressure while passing through the gas valve 1 through the pipe. In the state where fuel is supplied, the high voltage generated in accordance with the control signal from the microcomputer (30 in FIG. 2) built in the control panel 3 causes discharge from the igniter 7 and ignites the gas to start combustion.

버너(5)에서의 연소에 의하여 생성된 연소열은 연소실의 상부에 설치된 열교환기(11)를 통과하면서 내부에 충만된 난방수를 가열시킨다. 사용자에 의하여 설정된 소정온도로 난방수가 승온되면 순환펌프(21)의 회전력에 의하여 연결된 배관을 통하여 실내를 순환하면서 난방을 수행한다. 난방수온도를 측정하기 위한 한 쌍의 온도측정센서가 열교환기(11)에 인접한 배관에 설치되어 있다. 난방수온도(TS)는 난방온도센서(27)에 의하여 측정되며, 난방환수온도(TR)는 환수온도센서(29)에 의하여 측정되어서 마이컴(30)에 입력된다.The combustion heat generated by the combustion in the burner 5 heats the heating water filled therein while passing through the heat exchanger 11 installed in the upper part of the combustion chamber. When the heating water is heated to a predetermined temperature set by the user, the heating is performed while circulating the room through the pipe connected by the rotational force of the circulation pump 21. A pair of temperature measuring sensors for measuring the heating water temperature is installed in the pipe adjacent to the heat exchanger (11). The heating water temperature T S is measured by the heating temperature sensor 27, and the heating return temperature T R is measured by the return temperature sensor 29 and input to the microcomputer 30.

온수사용시에는 플로우스위치가 연결된 배관내부를 통과하는 직수의 이동상태를 마이컴에서 감지하여 유로를 적정하게 교환시켜 온수를 출탕하게 된다. 연소된 배기가스는 연소실상부에 설치된 배기후드(13)를 통하여 외부로 배출된다. 온수모드 및 난방모드 사용시에는 삼방변(19)에 의하여 난방수의 유로가 제한된다.When using hot water, the microcomputer detects the movement of water flowing through the pipe connected to the flow switch, and exchanges the flow path appropriately to tap hot water. The combusted exhaust gas is discharged to the outside through the exhaust hood 13 installed in the combustion chamber upper part. When the hot water mode and the heating mode are used, the flow path of the heating water is limited by the three-way valve 19.

상기와 같이 2개의 온도센서(27,29)를 사용하는 보일러에서는 과열이 발생되는 것을 감지하기 위하여 난방수온도(TS)와 난방환수온도(TR)를 측정하고, 난방수온도(TS)-난방환수온도(TR)〉 40℃ 이면 과열발생으로 감지하여 즉시 보일러를 오프시키도록 구성되어 있다. 그러나 이러한 온도차는 실제 과열발생이 아닌 상태에서도 보일러의 배관이 길어서 온도차가 커지거나 실내의 온도가 너무 낮아서 발열량이 많기 때문에 발생되는 등의 문제점이 있었다. 따라서 정상적으로 작동되어야 하는데도 불구하고 보일러 작동이 자주 중단되고 다시 초기가열상태에서 보일러운전을 시작하므로 난방이 잘되지 않고 연료가 낭비되는 문제점이 있었던 것이다.In the boiler using two temperature sensors 27 and 29 as described above, in order to detect the occurrence of overheating, the heating water temperature T S and the heating return temperature T R are measured, and the heating water temperature T S ) -Heating return temperature (T R )> 40 ℃ is configured to detect the overheating and turn off the boiler immediately. However, such a temperature difference has a problem such that a large temperature difference due to a long pipe of the boiler even if the actual heat generation is not generated, or because the heat generated in the room is too low to generate a large amount of heat. Therefore, despite the normal operation, the boiler is frequently stopped, and the boiler operation starts again in the initial heating state, so that the heating is not good and the fuel is wasted.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 한 쌍의 온도센서를 사용하여 제어를 수행하는 보일러에서 버너에서의 가스연소상태를 난방수 및 환수의 온도를 감지하고 제어하여 보일러의 급속난방 및 불필요하게 낭비되는 에너지를 절약할 수 있는 가스보일러의 연소제어방법을 제공하는데 있다.The present invention has been made to solve the above problems, an object of the present invention is to detect the temperature of the heating water and the return of the gas combustion state in the burner in the boiler to perform a control using a pair of temperature sensors It is to provide a combustion control method of a gas boiler that can control the rapid heating of the boiler and save unnecessary energy.

상기 목적을 달성하기 위한 본 발명의 가스보일러의 연소제어방법은, 전체 행정을 제어하는 프로그램이 내장된 마이컴과, 버너에 공급되는 가스량을 조정할 수 있는 가스밸브와, 난방수를 순환시키기 위한 순환펌프와, 난방수온도를 측정하기 위한 난방온도센서와, 난방환수온도를 측정하기 위한 환수온도센서를 포함하는 가스보일러에 있어서, 보일러에서의 연소행정수행명령으로 착화행정이 완료되면 일정가스량으로 초기연소행정을 수행하며 마이컴에서 난방온도센서를 사용하여 난방수온도를 측정하고 온도변화율을 측정하는 제1단계; 온도변화율이 소정값보다 적으며 난방수온도가 일정온도 이하이면 마이컴에서 가스밸브에 제어신호를 출력하여 최대가스량으로 연소행정을 수행하고 순환펌프의 회전속도를 난방온도에 따라서 변화시키는 제2단계; 온도변화율이 소정값보다 크면 일정가스량을 유지하면서 연소행정을 수행하고, 마이컴에서 환수온도센서를 사용하여 난방환수온도를 측정하는 제3단계; 및 난방수온도와 난방환수온도의 온도차가 과열범위를 초과하거나 난방수온도가 과열온도이면 보일러를 오프시키고 그렇지 않으면 정상적인 비례제어를 수행하는 제4단계로 구성됨을 특징으로 한다.The combustion control method of the gas boiler of the present invention for achieving the above object is a microcomputer with a built-in program for controlling the entire stroke, a gas valve that can adjust the amount of gas supplied to the burner, and a circulation pump for circulating the heating water And, a gas boiler comprising a heating temperature sensor for measuring a heating water temperature and a return temperature sensor for measuring a heating return temperature, wherein the combustion is performed at a constant gas volume when the ignition stroke is completed by a combustion stroke execution command in the boiler. Performing a stroke and measuring a heating water temperature using a heating temperature sensor in a microcomputer and measuring a rate of change of temperature; A second step of, if the temperature change rate is less than a predetermined value and the heating water temperature is lower than a predetermined temperature, the microcomputer outputs a control signal to the gas valve to perform a combustion stroke with the maximum amount of gas and change the rotational speed of the circulation pump according to the heating temperature; A third step of performing a combustion stroke while maintaining a constant gas amount when the temperature change rate is greater than a predetermined value, and measuring a heating return temperature using a return temperature sensor in a microcomputer; And a fourth step of turning off the boiler if the temperature difference between the heating water temperature and the heating return temperature exceeds the overheating range or the heating water temperature is overheating.

도 1은 종래 사용되는 가스보일러의 개략적인 구성도,1 is a schematic configuration diagram of a gas boiler conventionally used;

도 2는 도 1의 가스보일러의 부분블럭회로도,2 is a partial block circuit diagram of the gas boiler of FIG.

도 3은 본 발명에 의한 가스보일러의 연소제어방법을 설명하기 위한 플로우차트이다.3 is a flowchart for explaining a combustion control method of the gas boiler according to the present invention.

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1 : 가스밸브, 3 : 제어패널,1: gas valve, 3: control panel,

5 : 버너, 7 : 이그나이터,5: burner, 7: igniter,

9 : 염전압감지부, 11: 열교환기,9: salt voltage detection unit, 11: heat exchanger,

13: 배기후드, 15: 배기팬,13: exhaust hood, 15: exhaust fan,

17: 물탱크, 19: 삼방변,17: water tank, 19: triangulation,

21: 순환펌프, 23: 공급관,21: circulation pump, 23: supply pipe,

25: 환수관, 27: 난방온도센서,25: return pipe, 27: heating temperature sensor,

29: 환수온도센서, 30: 마이컴.29: return temperature sensor, 30: microcomputer.

이하 첨부된 도면을 참고하여 본 발명의 가스보일러의 연소제어방법을 상세히 설명하면 다음과 같다.Hereinafter, a combustion control method of the gas boiler of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 방법은 난방수온도(TS)와 난방환수온도(TR)를 측정하여 난방수온도를 제어하는 보일러에 적용되는 것으로서, 난방수온도(TS)와 난방환수온도(TR)의 온도차가 소정온도이상이면 과열상태가 아닌데도 불구하고 보일러가 오프되는 것을 방지하여 에너지낭비를 방지하고 또한 난방수를 온도에 따라서 순환시켜 난방을 급속하게 하기 위한 것이다.The method of the invention as applied to the boiler to control the heating water temperature by measuring the degree heating water temperature (T S) and the heating return temperature (T R), is also heated water temperature (T S) and the heating return temperature (T R) If the temperature difference is greater than a predetermined temperature, the boiler is prevented from being turned off despite being not overheated to prevent energy waste and to circulate the heating water according to the temperature to rapidly heat the heating.

상기와 같은 본 발명의 방법은, 도 2에 도시된 종래 가스보일러에서 수행될 수 있으며, 다음과 같은 단계 : 보일러에서의 연소행정수행명령으로 착화행정이 완료되면 일정가스량(K)으로 초기연소행정을 수행하며 마이컴(30)에서 난방온도센서(27)를 사용하여 난방수온도(TS)를 측정하고 온도변화율(ΔT/t)을 측정하는 제1단계; 온도변화율이 소정값(α)보다 적으며 난방수온도(TS)가 일정온도(T) 이하이면 마이컴(30)에서 가스밸브(1)에 제어신호를 출력하여 최대가스량으로 연소행정을 수행하고 순환펌프(21)의 회전속도를 난방온도에 따라서 변화시키는 제2단계; 온도변화율이 소정값(α)보다 크면 일정가스량(K)을 유지하면서 연소행정을 수행하고, 마이컴(30)에서 환수온도센서(29)를 사용하여 난방환수온도(TR)를 측정하는 제3단계; 및 난방수온도(TS)와 난방환수온도(TR)의 온도차가 과열범위를 초과하거나 난방수온도(TS)가 과열온도이면 보일러를 오프시키고 그렇지 않으면 정상적인 비례제어를 수행하는 제4단계를 포함하고 있다.The method of the present invention as described above, may be performed in the conventional gas boiler shown in Figure 2, the following steps: when the ignition stroke is completed by the combustion stroke performance command in the boiler, the initial combustion stroke to a certain amount of gas (K) Performing a first step of measuring a heating water temperature (T S ) using a heating temperature sensor (27) in the microcomputer (30) and measuring a temperature change rate (ΔT / t); If the temperature change rate is less than the predetermined value α and the heating water temperature T S is less than or equal to the predetermined temperature T, the microcomputer 30 outputs a control signal to the gas valve 1 to perform a combustion stroke with the maximum amount of gas. A second step of changing the rotational speed of the circulation pump 21 according to the heating temperature; When the temperature change rate is greater than the predetermined value α, the combustion stroke is performed while maintaining the constant gas amount K, and the heating return temperature T R is measured by the microcomputer 30 using the return temperature sensor 29. step; And the fourth step of turning off the boiler if the temperature difference between the heating water temperature T S and the heating return temperature T R exceeds the overheating range or the heating water temperature T S is an overheating temperature. It includes.

사용자에 의하여 보일러의 난방 또는 온수모드로 제어신호가 입력되면 마이컴(30)에서는 배기팬(15)을 고속으로 회전시켜서 소정시간동안에 프리퍼지행정을 수행하고 가스밸브(1)를 개방하여서 버너(5)에 가스를 공급한 후에 이그나이터(7)에 고전압을 출력하여 착화행정을 수행한다.When the control signal is input in the heating or hot water mode of the boiler by the user, the microcomputer 30 rotates the exhaust fan 15 at a high speed to perform prepurge stroke for a predetermined time and open the gas valve 1 to burner (5). After the gas is supplied to the igniter 7, a high voltage is output to perform ignition stroke.

염전압감지부(9)로부터의 신호에 의하여 착화행정이 완료된 것이 확인되면 마이컴(30)에서는 종래 최대가스량으로 연소행정을 수행하던 것과는 달리 일정가스량(K)을 버너(5)에 공급하여 연소행정을 정상적으로 수행한다. 상기 일정가스량(K)은 최대가스량의 70∼80% 정도로 설정하는 것이 바람직하다.When it is confirmed that the ignition stroke is completed by the signal from the salt voltage detection unit 9, the microcomputer 30 supplies a constant gas amount K to the burner 5 unlike the conventional combustion stroke with the maximum gas amount. Will run normally. Preferably, the constant gas amount K is set at about 70 to 80% of the maximum gas amount.

상기와 같이 일정가스량(K)으로 버너(5)에서 연소행정을 수행하면서 마이컴(30)에서는 먼저 난방온도센서(27)를 사용하여 난방수온도(TS)를 측정한다. 동시에 시간당의 온도변화율(ΔT/t)도 감지한다. 이러한 감지결과, 난방수온도(TS)가 일정온도(T)(=과열온도 또는 다른 설정온도값)를 초과하지 않고, 또한 온도변화율이 소정값(α)를 초과하지 않으면 이것은 온도상승이 미약한 것으로 판단하고 과열염려가 없으므로 종래와 같이 가스밸브(1)를 사용하여 최대가스량을 버너(5)에 공급하여 연소행정을 수행한다.As described above, while performing the combustion stroke in the burner 5 with a constant gas amount K, the microcomputer 30 first measures the heating water temperature T S using the heating temperature sensor 27. At the same time, the rate of change of temperature per hour (ΔT / t) is also detected. As a result of this detection, if the heating water temperature T S does not exceed the constant temperature T (= overheating temperature or other set temperature value), and the rate of change of temperature does not exceed the predetermined value α, this means that the temperature rise is weak. Since it is judged that there is no fear of overheating, the combustion stroke is performed by supplying the maximum amount of gas to the burner 5 using the gas valve 1 as in the related art.

상기 소정값(α)은 예를 들어서 1℃/min등과 같이 설정될 수 있다. 소정값(α)는 물론 보일러의 크기, 용량등에 따라서 변경될 수 있음을 본 발명이 속하는 분야의 당업자에게는 명백한 것이다.The predetermined value α may be set, for example, at 1 ° C./min. It will be apparent to those skilled in the art that the predetermined value α may, of course, vary depending on the size, capacity, etc. of the boiler.

또한 최대가스량으로 연소행정을 수행하면서 마이컴(30)에서는 순환펌프(21)를 제어하여 난방수의 이동속도를 변경할 수 있다. 이것은 난방수의 이동을 신속하게 수행하여 난방을 빠른 시간내에 수행하기 위한 것으로서, 예를 들어서 난방수온도(TS)가 65℃ 이하이면 중속으로 이동시키고, 65℃ 이상이면 고속으로 회전시켜 난방을 수행할 수 있는 것이다.In addition, while performing the combustion stroke with the maximum amount of gas, the microcomputer 30 may control the circulation pump 21 to change the moving speed of the heating water. This is to perform heating in a short time by quickly moving the heating water. For example, when the heating water temperature (T S ) is 65 ° C. or lower, it moves at a medium speed. It can be done.

한편, 난방수온도(TS)가 과열온도를 초과하지 않지만, 온도변화율이 소정값(α)를 초과하는 경우에는 온도상승이 급속한 것으로 판단하고 과열이 발생된 염려가 있으므로 가스공급량을 증대시키지 않고 현재 화력, 즉 일정가스량(K)을 유지하게 된다. 동시에 마이컴(30)에서는 환수온도센서(29)를 사용하여 난방환수온도(TR)를 측정하게 된다.On the other hand, if the heating water temperature (T S ) does not exceed the overheating temperature, but the temperature change rate exceeds the predetermined value (α), it is determined that the temperature rise is rapid and there is a risk of overheating, so that the gas supply amount is not increased. The current thermal power, that is, to maintain a certain amount of gas (K). At the same time, the microcomputer 30 measures the heating return temperature T R using the return temperature sensor 29.

따라서 마이컴(30)에서는 난방수온도(TS)와 난방환수온도(TR)가 모두 입력되는 것이다. 마이컴(30)을 이것을 이용하여 과열상태인가 아닌가를 판단하게 된다. 만일 난방수온도(TS)- 난방환수온도(TR)〉 40℃ 로서 종래와 같은 과열감지범위를 초과하면 이 때에는 과열상태로 판단하고 보일러의 안전을 위하여 오프시키게 된다. 그러나 과열온도가 아니면 마이컴(30)에서는 종래와 같이 사용자에 의하여 설정된 온도에 따라서 비례제어를 수행한다.Therefore, in the microcomputer 30, both the heating water temperature T S and the heating return temperature T R are input. By using this, the microcomputer 30 determines whether it is in an overheated state. If the heating water temperature (T S )-heating return temperature (T R )> 40 ° C exceeds the conventional overheat detection range, it is judged to be overheated and turned off for the safety of the boiler. However, if it is not the overheating temperature, the microcomputer 30 performs proportional control according to the temperature set by the user as in the prior art.

본 발명에서는 또한 상기 제2단계에서의 일정온도(T)가 난방공급수를 기준으로 하는 경우에는 과열제어온도와 동일한 값이며, 난방환수를 기준으로 하는 경우에는 동일하지 않은 값으로 설정할 수 있음을 본 발명이 속하는 분야의 당업자에게는 명백한 것이다.In the present invention, when the predetermined temperature (T) in the second step is based on the heating supply water, the same value as the overheat control temperature, and can be set to a value not equal to the heating return water. It will be apparent to those skilled in the art to which the invention pertains.

상기와 같이 본 발명에 의하면 한 쌍의 온도센서를 사용하여 제어를 수행하는 보일러에서 버너에서의 가스연소상태를 난방수 및 환수의 온도를 감지하고 제어하여 보일러의 급속난방 및 불필요하게 낭비되는 에너지를 절약할 수 있는 이점이 있는 것이다.According to the present invention as described above by using a pair of temperature sensors to control the gas combustion state of the burner in the boiler to control the temperature of the heating water and return water to control the rapid heating and unnecessary waste of the boiler There is an advantage to save.

본 발명은 기재된 구체예에 대해서만 상세히 설명되었지만 본 발명의 사상과 범위내에서 변형이나 변경할 수 있음은 본 발명이 속하는 분야의 당업자에게는 명백한 것이며, 그러한 변형이나 변경은 첨부한 특허청구범위에 속한다 할 것이다.Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such variations or modifications will belong to the appended claims. .

Claims (3)

전체 행정을 제어하는 프로그램이 내장된 마이컴(30)과, 버너(5)에 공급되는 가스량을 조정할 수 있는 가스밸브(1)와, 난방수를 순환시키기 위한 순환펌프(21)와, 난방수온도(TS)를 측정하기 위한 난방온도센서(27)와, 난방환수온도(TR)를 측정하기 위한 환수온도센서(29)를 포함하는 가스보일러에 있어서,Microcomputer 30 with a built-in program for controlling the entire stroke, gas valve 1 for adjusting the amount of gas supplied to burner 5, circulation pump 21 for circulating heating water, and heating water temperature In the gas boiler comprising a heating temperature sensor 27 for measuring (T S ) and a return temperature sensor (29) for measuring the heating return temperature (T R ), 보일러에서의 연소행정수행명령으로 착화행정이 완료되면 일정가스량(K)으로 초기연소행정을 수행하며 마이컴(30)에서 난방온도센서(27)를 사용하여 난방수온도(TS)를 측정하고 온도변화율(ΔT/t)을 측정하는 제1단계;When the ignition stroke is completed by the combustion stroke execution command in the boiler, the initial combustion stroke is performed with a certain amount of gas (K), and the heating water temperature T S is measured using the heating temperature sensor 27 in the microcomputer 30 and the temperature A first step of measuring a rate of change ΔT / t; 온도변화율이 소정값(α)보다 적으며 난방수온도(TS)가 일정온도(T) 이하이면 마이컴(30)에서 가스밸브(1)에 제어신호를 출력하여 최대가스량으로 연소행정을 수행하고 순환펌프(21)의 회전속도를 난방온도에 따라서 변화시키는 제2단계;If the temperature change rate is less than the predetermined value α and the heating water temperature T S is less than or equal to the predetermined temperature T, the microcomputer 30 outputs a control signal to the gas valve 1 to perform a combustion stroke with the maximum amount of gas. A second step of changing the rotational speed of the circulation pump 21 according to the heating temperature; 온도변화율이 소정값(α)보다 크면 일정가스량(K)을 유지하면서 연소행정을 수행하고, 마이컴(30)에서 환수온도센서(29)를 사용하여 난방환수온도(TR)를 측정하는 제3단계; 및When the temperature change rate is greater than the predetermined value α, the combustion stroke is performed while maintaining the constant gas amount K, and the heating return temperature T R is measured by the microcomputer 30 using the return temperature sensor 29. step; And 난방수온도(TS)와 난방환수온도(TR)의 온도차가 과열범위를 초과하거나 난방수온도(TS)가 과열온도이면 보일러를 오프시키고 그렇지 않으면 정상적인 비례제어를 수행하는 제4단계로 구성됨을 특징으로 하는 가스보일러의 연소제어방법.If the temperature difference between the heating water temperature (T S ) and the heating return temperature (T R ) exceeds the overheating range or the heating water temperature (T S ) is an overheating temperature, turn off the boiler. Combustion control method of a gas boiler, characterized in that configured. 제1항에 있어서, 상기 순환펌프(21)의 속도가 난방수온도(TS)가 65℃ 이상이면 고속으로 회전시키고, 65℃ 이하이면 중속으로 회전시키는 것을 특징으로 하는 가스보일러의 연소제어방법.The combustion control method according to claim 1, wherein the circulation pump 21 rotates at high speed when the heating water temperature T S is 65 ° C. or higher, and rotates at medium speed if the heating water temperature T S is 65 ° C. or lower. . 제1항에 있어서, 상기 제1단계에서의 일정가스량(K)이 최대가스량의 70∼80%의 가스공급량으로 설정되는 것을 특징으로 하는 가스보일러의 연소제어방법.2. The combustion control method according to claim 1, wherein the constant gas amount K in the first step is set to a gas supply amount of 70 to 80% of the maximum gas amount.
KR1019970058747A 1997-11-07 1997-11-07 Combustion control method of gas boiler KR100254800B1 (en)

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Publication number Priority date Publication date Assignee Title
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