KR19990027502A - How to extinguish gas boiler error - Google Patents

Abstract

The present invention relates to a fire extinguishing method when an error occurs in a gas boiler for protecting electrical equipment. It is about fire extinguishing method in case of error of boiler.

The gas fire extinguishing method of the gas boiler according to the present invention includes a microcomputer 26 having a program for controlling the entire stroke, a temperature sensing unit 10 for sensing the temperature of the heating water, and a burner 28 for gas. A gas boiler comprising a gas valve (4) for supplying, comprising: a first step of detecting an error occurrence state in a microcomputer (26) while performing a combustion stroke in a boiler; A second step of maintaining a normal combustion state when no error occurs and performing a fire extinguishing stroke when an error occurs; Resetting the boiler operation mode to the heating mode after performing the fire extinguishing stroke and operating the exhaust fan 14 and the circulation pump 20 in the microcomputer 26 for 30 seconds to lower the heating water temperature; A fourth step of measuring the heating water supply temperature using the temperature sensing unit 10 in the microcomputer 26; A fifth step of stopping a boiler operation and maintaining a standby state when the measured heating supply water temperature is 55 ° C. or lower; If the heating water supply temperature is 55 ℃ or more, the temperature increase rate per unit time is calculated, and if the decrease state returns to the fifth step, and if the increase state operates the exhaust fan 14 and the circulation pump 20 and returns to the fourth step It consists of six steps.

Description

How to extinguish gas boiler error

The present invention relates to a fire extinguishing method when an error occurs in a gas boiler for protecting electrical equipment. Fire extinguishing method in case of error of boiler.

Gas boilers are increasingly being used because of the use of clean fuel gas, which reduces pollutants and reduces environmental pollution. 1 and 2 is a schematic configuration and block circuit diagram of a conventionally used gas boiler has a heating mode for performing indoor heating and a hot water mode for supplying hot water to the bathroom or sink. Referring to Figures 1 and 2 will be described briefly the operating state.

As shown in FIG. 1, the gas boiler controls the gas valve 4 to supply a predetermined amount of gas to the burner 28 while igniting and burning it in the burner 28 and using high temperature heat generated at this time. to be. The ignition in the burner 28 applies a high voltage to the igniter 22 after the gas is supplied and ignites the gas by the spark generated at this time. The hot heat generated by the ignition rises and heats the heat exchanger 30 installed on the upper side of the burner 28. The detection of the ignition state is detected by the salt voltage detection unit 12 by transmitting the ignition state data to the microcomputer 26. In the heat exchanger 30, heating water and direct water flow, respectively. Direct water flows in through the direct water supply pipe 2a, passes through the heat exchanger 30, and is discharged through the other end of the direct water supply pipe 2a after the water temperature is elevated by heat exchange with the heating water.

On the other hand, the heating water passes through the supply pipe 38 is moved to the pipe (not shown) installed indoors. At this time, the movement to the water tank 34 or the circulation pump 20 by the three-way side 36 is blocked. The heat is deprived of heat while passing through the heating pipe installed in the room, and the temperature of the heated water is introduced into the water tank 34. The water tank 34 is a temporary storage of the heating return water and is also connected to the automatic refill water valve 18 for replenishing insufficient heating water. The automatic refill water valve 18 is connected to the direct water supply pipe 2a to replenish water when the water tank 34 lacks water. The heating water introduced into the water tank 34 passes through the three-way valve 36-the circulation pump 20-the return pipe 40 and then enters the heat exchanger 30 to be heated up, and then through the supply pipe 38. Repeat the cycle.

In the conventional boiler as described above, it has the function of inspecting the operation state of safety-sensitive electrical equipment such as electrical equipment or temperature sensing sensor during operation. It has an error generating function to stop the boiler operation. 3 is a flowchart for explaining a digestion operation performed when an error occurs conventionally used.

However, as shown in the above flow chart, the supply of gas supplied through the gas valve 4 is cut off to drive the exhaust fan 14 for 30 seconds and the circulation pump 20 also operates for 30 seconds. Due to the latent heat, the temperature of the heating water did not fall sufficiently, and there was a problem of being maintained for a long time in an overheated state. As is well known, when exposed to heat for a long time in an overheated state, the deterioration of the electrical equipment is accelerated, and there is a problem that a failure occurs to other electrical components other than an error occurrence factor.

The present invention has been made to solve the above problems, an object of the present invention is an error of the gas boiler that can quickly lower the temperature of the heating water when performing the fire extinguishing due to an error occurs during the combustion of the boiler. To provide a fire extinguishing method when occurring.

The fire extinguishing method of the gas boiler of the present invention for achieving the above object, the microcomputer 26 with a built-in program for controlling the entire stroke, the temperature sensing unit 10 for sensing the temperature of the heating water, the burner A gas boiler comprising a gas valve (4) for supplying gas to (28), comprising: a first step of detecting an error occurrence state in a microcomputer (26) while performing a combustion stroke in a boiler; A second step of maintaining a normal combustion state when no error occurs and performing a fire extinguishing stroke when an error occurs; Resetting the boiler operation mode to the heating mode after performing the fire extinguishing stroke and operating the exhaust fan 14 and the circulation pump 20 in the microcomputer 26 for 30 seconds to lower the heating water temperature; A fourth step of measuring the heating water supply temperature using the temperature sensing unit 10 in the microcomputer 26; A fifth step of stopping a boiler operation and maintaining a standby state when the measured heating supply water temperature is 55 ° C. or lower; And if the heating supply water temperature is 55 ° C. or higher, calculate the temperature increase rate per unit time, and return to the fifth step if the reduction state is increased, and operate the exhaust fan 14 and the circulation pump 20 if the increase state is increased, and return to the fourth step. It consists of six steps

1 is a schematic configuration diagram of a gas boiler conventionally used;

FIG. 2 is a schematic block circuit diagram of the gas boiler of FIG. 1;

3 is a flowchart illustrating an operating state during fire extinguishing by the conventional fire extinguishing temperature;

4 is a flow chart illustrating the method of the invention.

Explanation of symbols for the main parts of the drawings

2: flow switch, 4: gas valve,

6: fan rotation speed detection unit, 8: water level detection unit,

10: temperature sensor, 10a: temperature sensor,

10b: overheat detection sensor, 12: salt voltage detection unit,

14: exhaust fan, 16: power supply,

18: automatic refill water valve, 20: circulation pump,

22: igniter, 24: room cone,

26: micom, 28: burner,

30: heat exchanger, 32: exhaust hood,

34: water tank, 36: triangulation,

38: return pipe, 40: supply pipe.

Hereinafter, a method of extinguishing a gas boiler of the present invention with reference to the accompanying drawings will be described in detail.

The method of the present invention is a method of extinguishing an error of a gas boiler that can quickly lower the temperature of the heating water when the boiler is stopped for the user's safety when an error occurs in a state in which the boiler is operated in a combustion mode. to be. According to the method of the present invention, when an error occurs in a combustion state, the fire extinguishing stroke is performed and the temperature of the heating supply water is measured after switching the boiler operation mode to the heating mode, and the heating water temperature is rapidly reduced by using the same.

The method of the present invention as described above comprises the following steps: a first step of detecting an error occurrence state in the microcomputer 26 while performing a combustion stroke in a boiler; A second step of maintaining a normal combustion state when no error occurs and performing a fire extinguishing stroke when an error occurs; Resetting the boiler operation mode to the heating mode after performing the fire extinguishing stroke and operating the exhaust fan 14 and the circulation pump 20 in the microcomputer 26 for 30 seconds to lower the heating water temperature; A fourth step of measuring the heating water supply temperature using the temperature sensing unit 10 in the microcomputer 26; A fifth step of stopping a boiler operation and maintaining a standby state when the measured heating supply water temperature is 55 ° C. or lower; If the heating water supply temperature is 55 ℃ or more, the temperature increase rate per unit time is calculated, and if the decrease state returns to the fifth step, and if the increase state operates the exhaust fan 14 and the circulation pump 20 and returns to the fourth step It consists of six steps.

The method of the present invention, with reference to the flowchart of FIG. 4, detects whether an error occurs in the microcomputer 26 in either the heating mode or the hot water mode and the boiler is operating in a combustion stroke. If no error occurs, the microcomputer 26 performs a normal combustion stroke, and if an error occurs, a fire extinguishing stroke is performed. The occurrence of an error in the electronic device may be recognized by the microcomputer 26 to detect an electric signal input from each electric device.

In order to perform the fire extinguishing stroke, the microcomputer 26 turns off the gas valve 4 to block the gas supply to the burner 28 and first resets the operation mode of the boiler to the heating mode. That is, if the previous boiler operation mode is the heating mode, the state is maintained, and if the hot water mode is switched to the heating mode. The switching of the heating / hot water mode is performed by switching of the three-way sides 36. Of course, in boilers that do not use three-way, mode switching is performed using the function of the boiler itself.

The three-way side 36 serves to switch the movement of the heating water to circulate the heating water for heating or to move the closed circuit for the use of hot water. In the state in which the boiler operation mode is set as the heating mode as described above, the microcomputer 26 operates the exhaust fan 14 and the circulation pump 20 for about 30 seconds to lower the heating water temperature.

After that, the microcomputer 26 measures the temperature of the heating water supply using the temperature sensor 10a. The temperature sensor 10a and the overheat sensor 10b are essentially the same temperature sensor.

If the temperature data of the heating supply water input through the temperature sensor 10a does not exceed a predetermined temperature, the microcomputer 26 maintains the standby state in a state in which the boiler is stopped. After fire extinguishing due to overheating, the boiler does not operate unless a new command is input by the user for safety. The predetermined temperature may be, for example, about 55 degrees Celsius.

When the temperature data exceeds the predetermined temperature, the microcomputer 26 measures the temperature increase rate? T / t per unit time to ensure the temperature increase and decrease. This can be set as a change in temperature over a period of time (eg 5 seconds).

When the temperature increase rate (ΔT / t) per unit time as described above becomes (+), this means that the temperature of the heating supply water rises, and thus, it is not a desirable state, and it is necessary to lower the temperature of the heating water.

Therefore, the microcomputer 26 may operate the exhaust fan 14 or the circulation pump 20 to cool the air by introducing cold external air into the boiler or cool the air or circulate the heating water to release the heat to lower the temperature. Alternatively, the exhaust fan 14 and the circulation pump 20 may be operated at the same time to lower the air cooling method and the heating water temperature.

When the temperature increase rate (ΔT / t) per unit time becomes (-), it is in the state of decreasing temperature, so it is maintained in the standby state with the boiler stopped.

As described above, according to the present invention, an error occurs during the combustion of the boiler, so that the temperature of the heating water can be rapidly lowered when the fire extinguishing is performed.

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 (1)

A gas including a microcomputer 26 having a program for controlling the entire stroke, a temperature sensing unit 10 for sensing a temperature of heating water, and a gas valve 4 for supplying gas to the burner 28. In the boiler, A first step of detecting an error occurrence state in the microcomputer 26 while performing a combustion stroke in a boiler; A second step of maintaining a normal combustion state when no error occurs and performing a fire extinguishing stroke when an error occurs; Resetting the boiler operation mode to the heating mode after performing the fire extinguishing stroke and operating the exhaust fan 14 and the circulation pump 20 in the microcomputer 26 for 30 seconds to lower the heating water temperature; A fourth step of measuring the heating water supply temperature using the temperature sensing unit 10 in the microcomputer 26; A fifth step of stopping a boiler operation and maintaining a standby state when the measured heating supply water temperature is 55 ° C. or lower; And If the heating water supply temperature is 55 ℃ or more, the temperature increase rate per unit time is calculated, and if the decrease state returns to the fifth step, and if the increase state operates the exhaust fan 14 and the circulation pump 20 and returns to the fourth step Fire extinguishing method of the gas boiler, characterized in that consisting of six steps.