KR930006375A - Heating combustion control method and device therefor at low temperature setting in gas boiler - Google Patents

Abstract

The present invention relates to a heating combustion control method when setting a low temperature in a gas boiler. In the conventional gas boiler, when a heating load and a minimum input match (matching) are made when the heating set temperature is set to a low temperature, the heating set temperature continues. As the continuous combustion is continuously maintained at an approximate value of the minimum calorific lower limit or the minimum calorific lower limit, the temperature difference between the heating return water and the heating tap water increases, causing a drain phenomenon in the main heat exchanger.

Therefore, in the present invention, when the heating set temperature is set below the predetermined temperature, the lower limit value of the minimum input is forcibly increased (that is, Qmin XY times), so that continuous combustion is performed while the heating load and the minimum heat amount are matched. Even if the return temperature of the heating return is increased, the difference with the temperature in the combustor can be reduced, and the drain phenomenon occurring in the main heat exchanger can be prevented in advance, further improving the reliability of the product. .

Description

Heating combustion control method and device therefor at low temperature setting in gas boiler

Since this is an open matter, no full text was included.

1 is a block diagram of an apparatus of the present invention;

2 is a schematic configuration diagram of a gas boiler to which the present invention is applied;

3 is a flowchart for explaining the method of the present invention.

Claims (3)

When the operation switch is turned "on" and the water flow switch 43 "is" off "when the winter mode is selected, in the heating combustion control method of the gas boiler which performs heating operation, the water flow switch 43" is When it is turned off, it detects whether the user's heating set temperature (HTset) is lower than or equal to the predetermined temperature (X ℃). As a result, when the HTset> X ℃ status changes, combustion starts with the minimum heat limit and then the heating set temperature (HTset). Is detected to be lower than or equal to the heating water temperature (Ton), and if the condition is HTset> Ton, the Vile control is continuously performed within the range of the maximum heat limit (Qmax) and the minimum heat limit (Qmin) until HTset ≤ Ton. When HTset≤Ton state, normal combustion is performed to perform minimum calorie lower limit combustion with the minimum input, but when HTset≤X ℃ state, combustion starts with minimum calorific value lower limit XY times until HTset≤Ten state. After the proportional control system is executed with the comparison between the waterproof temperature and the heating set temperature, if the heating set temperature (HTset) is lower than or equal to the heating water temperature (Ton), the minimum calorific value (Qmin) XY times of combustion is continued to return the heating water. A method of controlling heating and combustion during low temperature setting in a gas boiler, characterized by preventing a drain phenomenon due to a temperature difference in a combustor. The manual control unit 11 is installed in the casing 101 connected to the outside, the control unit 10 for controlling the overall operation of the boiler, the combustor 20 for burning the gas to heat the hot water for heating or hot water, and heating In the gas boiler for heating the water according to the heating set temperature is combined with the expansion tank 30 for storing the circulating water and the auxiliary heat exchanger having a different path for the circulation of hot water and cold water to the user set heating temperature, The microcomputer 10 'inside and outside the control unit 10 receives a predetermined heating set temperature HTset from the heating temperature setting unit 11' in the manual control unit 11 and outputs a predetermined control signal. The heating water tapping temperature Ton is input from the temperature setpoint recognition command unit 112 and the heating water temperature detection unit 13, and a predetermined heating setpoint temperature HTset is received from the heating temperature setpoint recognition command unit 112. Enter the prize The temperature comparison unit 113 to be compared with the output value of the temperature comparison unit 113 and the rotation speed of the blower 23 output from the blower rotation speed detection unit 14 are respectively inputted, and output predetermined proportional valve control data. Pulse width through the combustion operation unit 114 and a predetermined signal pulse width modulation (PWM) unit 116 for driving a toilet by receiving a predetermined control signal from the combustion operation unit 114. And modulating and then interconnecting the proportional valve drive control unit (115) to be applied to the proportional valve drive unit (15). The heating device of claim 2, wherein the heating temperature set value recognition command unit 112 detects whether the heating set temperature of the user output from the heating temperature set unit 11 ′ is higher than a predetermined temperature (X ° C.). As a result of comparing the set temperature comparison unit 1121 and the heating set temperature comparison unit 113, when the heating set temperature HTset is higher than a predetermined temperature (X ° C), the maximum heat limit upper limit Qmax and the minimum heat limit lower limit Qmin ) Is compared with the first combustion command unit 1122 and the heating set temperature comparing unit 113, which respectively output the original values Q'max and Q'min, and the heating set temperature HTset is predetermined. If the temperature is lower than or equal to (X ℃), the maximum column upper limit value (Qmax) is output as the original value (Q'max), and the minimum calorific value lower limit value (Qmin) is output at a predetermined multiple (Y times) higher than the original value. 2 Low temperature in the gas boiler, characterized in that the combustion command unit 1123 and the interconnection configuration Heating time combustion controller. ※ Note: It is to be disclosed based on the original contents.