KR0169053B1 - Gas boiler combustion method when gas pressure adjustment switch is incorrectly connected - Google Patents

Abstract

The present invention relates to a gas combustion method in a gas boiler burner, and more particularly, to a combustion method in a gas burner with respect to misadjustment generated when gas valve adjustment of a gas boiler is performed.

Gas boiler combustion method when the gas pressure adjustment switch of the present invention is connected incorrectly, the timer is operated when the gas pressure adjustment switch is fixed, and the elapsed time is measured, and when the predetermined time elapses, the gas boiler combustion method is adjusted to a neutral position regardless of the position of the switch. It is characterized in that the proportional control is performed.

Description

Gas boiler combustion method when gas pressure adjustment switch is incorrectly connected

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

2 is a graph showing a gas range when setting the gas pressure in a conventional gas boiler.

3 is a front view showing an example of a gas pressure adjusting switch conventionally used.

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

5 is a schematic diagram of a circuit used to carry out the method of the present invention.

* Explanation of symbols for main parts of the drawings

1 gas valve 3 control unit

5: burner 7: spark plug

9: flame detector 11: heat exchanger

13 exhaust year 15 exhaust fan

17: exhaust fan drive unit 19: timer

21: switch 23: relay

31: micom

The present invention relates to a method of burning a gas in a gas boiler burner, and more particularly, to a method of burning in a gas burner with respect to a misalignment generated when adjusting a gas valve of a gas boiler.

Gas boilers tend to be widely used because of the reduced pollution due to the use of clean fuel gas and ease of use. However, since the gas pressure is changed according to the type of gas because gas is used as the fuel, it is required to set the gas pressure by a skilled technician before leaving the factory to maintain a proper state at all times. This is a process that must be adjusted because gas pressure varies depending on whether the gas used is LNG or LPG.

Conventionally, the adjustment switch provided in the gas valve was operated for adjustment of this gas pressure. That is, by adjusting the gas valve, the maximum value and the minimum value are adjusted, and the maximum value is adjusted to the maximum value at a predetermined current or voltage which is adjusted in advance, and the minimum value is set to the minimum value. As another method, the variable resistance value provided in the main control part is adjusted. That is, after determining the current value in consideration of the control area of the gas valve in advance, it is a method of setting the minimum current and the maximum current supplied from the PCB for the purpose of correcting the deviation of the gas valve and the PCB. The current value of the control region is determined at design time and becomes a reference value at gas pressure adjustment.

In the case of adjusting the gas pressure in the PCB, a separate switch is installed to adjust the maximum and minimum values on the PCB. The switch can be used as long as the three-point switch has a maximum value, a minimum value, and a neutral position. An example of this is shown in FIG. As shown, the top is the maximum value, the bottom is the minimum value, and the middle is the neutral position. Normally, when adjusting the gas pressure, the minimum gas pressure is set after the switch is positioned at the minimum value, and the maximum gas pressure is set after the switch is positioned at the maximum value. When setting the maximum and minimum values of the gas pressure is completed, the switch is returned to the neutral position.

However, during such a gas pressure setting operation, the adjuster accidentally leaves the factory without returning the switch to the neutral position. This causes a problem in the boiler operation. If the switch is placed at the minimum value, the heating and hot water output is minimized, resulting in impaired performance. If the switch is located at the maximum value, it will behave like an on / off boiler by losing the proportional control function. In addition, the temperature control function of the heating and hot water is lost and the fire and ignition stroke is repeated by the overheat prevention device and the circuit of the boiler.

This is a condition that cannot be adjusted by the user in the home of the end consumer, so a customer who is mistaken for the failure of the boiler requests service and is also a cause of consumer dissatisfaction. In addition, from the manufacturer's side, there was a problem that manpower and time should be put into the after-sales service to check for such a malfunction.

The present invention has been made to solve the above problems, an object of the present invention is to prevent the malfunction of the gas boiler caused by the wrong connection of the adjustment switch when adjusting the gas pressure gas boiler when the gas pressure adjustment switch is connected incorrectly It is to provide a combustion method.

It is another object of the present invention to provide a gas boiler continuous method in the case of a gas pressure adjustment switch misconnection, which can prevent a customer's complaint in advance by preventing a malfunction due to a misconnection of the adjustment switch, and eliminate the cause of after-sales service. .

Gas boiler combustion method in the case of incorrect connection of the gas pressure adjustment switch of the present invention for achieving the above object, the timer is operated by measuring the elapse of time when the gas pressure adjustment switch is fixed, and when the predetermined time has elapsed, Proportional control is performed by adjusting the neutral position without.

Hereinafter, a gas boiler combustion method at the time of incorrect connection of the gas pressure setting switch of the present invention will be described with reference to the accompanying drawings.

First, the schematic structure and operating state of a conventionally used gas boiler will be described with reference to FIG. The gas boiler is a device that uses heat generated by burning gas, which is a clean fuel, in the burner 5, and uses a heat exchanger 11 to convert low-temperature direct water or heating water into high-temperature hot water (heating water or It is a device that circulates and heats the heating pipe installed in the room after converting the temperature into hot water).

Typically, the exhaust gas burned in the burner 5 after being supplied through the gas valve 1 of the forced exhaust gas boiler is exhaust fan 15 installed in the exhaust flue 13 located on the upper side of the burner 5. By force is discharged to the outside of the boiler. The exhaust fan 15 may control the rotation speed of the exhaust fan by changing the voltage applied to the exhaust fan driver 17 and may also measure the rotation speed of the fan by using a separate measuring device.

Data such as the number of rotations of the exhaust fan and the voltage applied to the exhaust fan drive unit 17 are stored in a microcomputer or a memory device installed in the control unit 3, and these data are determined by experiments or calculations based on the specifications of the boiler. Stored.

Setting the maximum value and the minimum value in the gas boiler as described above is for setting the proportional control region according to the gas pressure adjustment in the proportional control gas boiler. FIG. 2 is a graph showing variables used in setting the maximum value and the minimum value, and shows that the gas pressure is linearly adjusted according to the current or voltage value applied to the gas valve 1.

According to the method of the present invention carried out in the gas boiler having the above configuration, when the gas pressure regulating switch is fixed, the microcomputer recognizes this and operates a timer to measure the passage of time, and when a predetermined time elapses, the method relates to the position of the switch. Adjust the gas pressure adjustment switch to the neutral position without

That is, in the present invention, the power is supplied to the gas boiler installed in the home after being shipped from the factory and is normally operated. Referring to FIG. 4, when power is supplied to the gas boiler, the microcomputer 31 first checks the state of the gas pressure adjusting switch 21 and then operates the timer 19 connected to the microcomputer 31. The elapse of time is detected by the microcomputer 31, and when a predetermined time, for example, 5 minutes, the microcomputer 31 unconditionally switches whether the position of the switch 21 is the maximum value, the minimum value or the neutral position. ) Is controlled to return to the neutral position.

This can be accomplished using a software program or using a device such as relay 23 conventionally used. It is also apparent to those skilled in the art that the present invention can be achieved by configuring a switching circuit electronically in place of the relay 23.

The software cuts off the signal from the switch 21 after a certain time elapses after the measurement using the timer 19, and outputs a control signal to unconditionally output a voltage to achieve the same effect as connected to the neutral position. Is achieved.

5 is a schematic circuit diagram configured to operate as described above as an example of another method. As shown, the relay 23 is operated according to the control signal output from the microcomputer 31, whereby the voltage signal from the contact point of the switch 21 is cut off, and the signal from the neutral position is input.

As described above, according to the present invention, it is possible to prevent the malfunction of the gas boiler caused by the incorrect connection of the adjustment switch when adjusting the gas pressure, and to prevent the customer's complaints by preventing the malfunction caused by the incorrect connection of the adjustment switch. There is an advantage that can eliminate the cause of the after-sales service.

Although the present invention has been described in detail only with respect to the described embodiments, modifications or changes that are possible within the spirit and scope of the present invention will be apparent to those skilled in the art to which the present invention pertains and will belong to the appended claims. .

Claims (2)

A combustion method of a gas boiler, comprising: recognizing this in the microcomputer 31 when the gas pressure adjusting switch 21 is fixed and operating a timer 19 to measure the passage of time; Setting the gas pressure adjusting switch 21 to the neutral position irrespective of the position of the switch 21 when a predetermined time measured by the timer 19 has elapsed. Gas boiler combustion method. The gas pressure setting switch of claim 1, wherein the means for setting the gas pressure adjusting switch 21 to the neutral position is a relay or a switching circuit operated by a control signal output from the microcomputer 31. Gas boiler combustion method.