KR100603233B1 - Ignition safety structure of gas boiler - Google Patents

Abstract

The present invention relates to an ignition safety device for a gas boiler, the main object of the invention is to drive the blower driving means so that the amount of air supplied from the blower matches the pre-set air flow rate value in the air flow setting means, the operation of the blower driving means In order to maintain a more stable ignition state through more precise control considering the pressure in the atmosphere.

Characteristic constituent means of the present invention for achieving the above object is air flow rate setting means 120 for setting the air flow rate to maintain the most suitable ignition state in the combustion chamber conditions of the gas boiler, supplying the air flow rate set by the air flow rate setting means And a blower driving means 130 for driving the blower 30, and a wind volume sensor 140 for measuring an amount of air supplied from the blower driving means to generate an electrical signal, and transmitting the electrical signal output from the wind volume sensor. Receiving air flow rate input means 150, analysis means 160 for analyzing whether the value of the signal input from the air flow rate input means coincides with the air volume set in the air flow rate setting means, blower 30 based on the analysis result of the analysis means The air that variably operates the blower driving means so that the amount of air supplied from the air coincides with the air volume set by the air volume setting means. To comprise a correction section (170).

Description

Ignition safety device for gas boilers {IGNITION SAFETY STRUCTURE OF GAS BOILER}

1 is a configuration diagram of a gas boiler

2 is a control block diagram of a gas boiler according to the present invention

<Code Description of Main Parts of Drawing>

10: sealed body 11: intake duct

12: exhaust duct 20: combustor

21: heat exchanger 22: burner

23: ignition transformer 24: thermistor

30 blower 31 suction chamber

32: air pressure detector 40: proportional control valve

41: first solenoid valve 42: second solenoid valve

43: pressure recognition unit 52: hot water flow switch

53: circulation pump 54: heating water filter

55: 3-way valve 56: hot water heat exchanger

60: expansion tank 70: room temperature controller

110: controller 120: air volume setting means

130: blower driving means 140: air flow sensor

150: air flow input means 160: analysis means

170: air blowing correction means 180: output controller

The present invention relates to an ignition safety device for a gas boiler, and more particularly, to include a controller for maintaining a more stable ignition state by including a blow amount correction means for supplying the air amount supplied from the blower according to a preset value. It is characterized by.

In general, the gas boiler can be divided into various types according to the control method or the sealed state, and in addition, it can be divided into condensing and non-condensing according to the recovery method of the heat source for heating the heating water. Among them, the condensing boiler has a sensible heat exchanger that directly heats the heating water by using the heat burned by the burner, and a latent heat exchanger that heats the heating water by using latent heat of exhaust gas passing through the sensible heat exchanger. In addition, the non-condensing boiler is equipped only with a sensible heat exchanger.

In addition, conventional methods of controlling the air ratio supplied to the burner of the non-condensing boiler include an ON / OFF control system and a current proportional control system.

ON / OFF control system has been used in the past as a way to selectively cut off the supply of gas while ON / OFF according to the operation signal of the boiler operation switch.

In the current proportional control system, the controller sends an output signal to the proportional control valve in response to a change in an input value such as a blower's rotation speed, thereby controlling the air ratio by varying the amount of fuel supplied to the burner.

That is, the current proportional control method controls the air ratio by varying the amount of gas supplied to the burner by selectively and independently controlling the rotation speed control and the gas amount control of the blower.

In the conventional ON / OFF control system, since the air ratio supplied to the burner is kept almost constant, a constant amount of fuel is always supplied regardless of the amount of air introduced, resulting in low combustion efficiency and excessive emission of harmful gases. In the current proportional control system, the responsiveness is low because the air ratio is controlled based on the input value and the method of varying the current value applied by the proportional valve such as the rotational speed of the blower. Regardless, there is a problem in that a constant amount of fuel is supplied, resulting in low combustion efficiency and many emissions of harmful gases.

The present invention has been made in view of the above-described conventional problems, and to solve the above problems, the main object of the invention is to drive the blower driving means so that the amount of air supplied from the blower is consistent with the pre-set air flow rate value in the air flow rate setting means; Therefore, the operation of the blower driving means is to maintain a more stable ignition state through more precise control considering the pressure in the atmosphere.

Characteristic constituent means of the present invention for achieving the above object is air flow rate setting means for setting the air flow rate to maintain the most suitable ignition state in the combustion chamber conditions of the gas boiler, and blower for supplying the air flow rate set by the air flow rate setting means A blower driving means for driving the air flow rate, and a flow rate sensor for measuring an amount of air supplied from the blower driving means and generating an electrical signal, and receiving a flow rate input means for receiving an electrical signal outputted from the flow rate sensor, and the flow rate input means An analysis means for analyzing whether or not the value of the signal input from the air flow rate is set by the air flow rate setting means, and the blower is driven so that the amount of air supplied from the blower is based on the analysis result of the analysis means Variable actuation It is to comprise an air blowing means for correcting.

At this time, the blow correction means is provided with an output controller for controlling the rotational speed of the blower driving means.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a gas boiler, and FIG. 2 is a control configuration diagram of a gas boiler according to the present invention.

First, the present invention is characterized in that the air flow rate setting means 120 for setting the air flow rate in association with the controller 110, the blower driving means 130 for driving the blower 30, and the air flow rate sensor for measuring the amount of air supplied 140, the air flow rate input unit 150 receives the electrical signal output from the air flow sensor.

In addition, the analysis means 160 for analyzing whether the value of the signal input from the air flow rate input unit is consistent with the air volume set in the air flow rate setting means, and the amount of air supplied from the blower 30 based on the analysis result of the analysis means. And a blow correction means 170 for variably operating the blower driving means so as to match the blow amount set by the blow amount setting means, and an output controller 180 of the blow correction means 170.

As shown in FIG. 1, a conventional gas boiler is operated in an air proportional control method such that a predetermined amount of air is always supplied by adjusting an air pressure according to a change in temperature of the outside air.

The airtight body 10 is provided with an intake duct 11 for sucking external air according to the operation of the blower 30 and an exhaust duct 12 for exhausting the burned exhaust gas to the outside, and the first electromagnetic valve and the first valve. There is a burner 22 which burns a mixture of the gas supplied through the two solenoid valves 41 and 42 and the proportional control valve 40 and the air sucked by the blower 30.

Moreover, the combustor 20 integrated with the heat exchanger 21 which heats heating water, and the hot water heat exchanger which heats water supply by the heating water heated through the said heat exchanger 21 ( 21) and a circulation pump 53 for supplying the heating water passing through the heating water filter 54 to the heat exchanger 21, and storing a portion of the heating water flowing in accordance with the operation of the three-way valve 55. An expansion tank 60 is provided.

In addition, for air proportional control, an air pressure detector 32 is installed in the suction chamber 31 to sense the air pressure sucked by the blower 30, and the pressure is detected by the pressure recognition unit 43 of the control valve. When input, the controller 110 burns the boiler with the extracted gas based on the air pressure sensed by the air pressure detector 32 and receives the signal of the temperature sensor to calculate the calorie value based on whether the set temperature is reached or not. The duty cycle of the rotation speed of the blower 30 is changed to change the air pressure to the required rotation speed to adjust the gas discharge amount of the air proportional valve to adjust the amount of gas supplied to the burner 22.

That is, a blower 30 is disposed below the combustor 20, and a burner 22 that burns air and gas sucked through the suction chamber 31 is installed above the blower 30. (22) The heat exchanger 21 is arrange | positioned at the upper part.

Therefore, the heat exchanger 21 heats the heating water in the process of exchanging heat by directly contacting the sensible heat generated from the burner.

The exhaust gas passing through the heat exchanger 21 is discharged to the outside through the exhaust duct 12.

In addition, according to the operation of the circulation pump 53, the temperature of the heating water heated in the process of passing through the heat exchanger 21 is sensed by the thermistor 24, and the controller 110 operates the boiler based on the input signal at this time. Control the state.

That is, the circulation pump 53 which circulates heating water is arrange | positioned in the lower left part of a boiler, and this circulation pump 53 introduces the heating water which finished heating in the heating water filter 54, and this heating water filter In 54, impurities contained in the heating water are removed, and the filtered heating water is supplied to the heat exchanger 21.

In addition, a heat exchanger for obtaining hot water using heat of heating water is shown below the expansion tank 60.

The cold water introduced by the operation of the hot water flow switch 57 is heated in the process of passing through the stacked series hot water heat exchanger 21 and then supplied to the required place.

On the other hand, a gas supply device is installed in the lower right side of the boiler. In addition to the first solenoid valve 41 and the second solenoid valve 42, the blower 30 supplies air according to an electric signal transmitted from the controller 110, and the proportional control valve 40 supplies gas to the combustor ( 20) to be supplied to the burner 22 in the upper portion.

Next, with reference to the block diagram shown in Figure 2 will be described the operation of the non-condensing boiler of the proportional control method according to the present invention.

The controller 110 calculates the fuel amount based on the optimum air-fuel ratio based on various input signals such as the heating water temperature sensed by the thermistor 24 and the desired room temperature and the desired operating time selected by the user. Next, by controlling the duty by sending a signal to the stepless control DC blower 30 based on the calculated fuel amount, the amount of fuel supplied to the burner 22 is optimally controlled in accordance with the change in air pressure. In addition to the DC blower 30, the controller 110 sends output signals to the first solenoid valve 41, the second solenoid valve 42, or the ignition transformer 23 to enable normal operation of the boiler.

In the drawings, reference numeral 70 denotes a room temperature controller.

In the present invention, it is possible to supply the amount of air supplied from the blower 30 in proportion to the amount of gas supplied in an arbitrary amount by the proportional control valve 40.

That is, when air is supplied by the blower driving means 130, the air flow sensor 140 detects the air flow volume and provides it to the analysis means 160 of the controller 110, and in the analysis means, the proportional control valve 40 On the basis of the amount of fuel provided by the air flow setting means 120 operates the blower driving means 130 to match the amount of air set in advance.

For example, when the atmospheric wind blows strongly and the atmospheric pressure outside the main body 10 of the boiler is high, the supply of air is greater than the rotational force of the blower driving means 130. In this case, the airflow sensor 140 of the airflow input unit 150 senses this and provides the detected value to the analysis unit 160, so as to lower the output of the blower driving unit 130 through the blower output controller 180. To control.

On the contrary, when the atmospheric pressure is low and the humidity is high and the external atmospheric pressure of the boiler main body 10 is low, the supply of air is reduced as compared with the rotational force of the blower driving means 130. In this case, the airflow sensor 140 of the airflow input unit 150 detects this and provides the detected value to the analysis unit 160, which analyzes the airflow drive controller 180 by causing the blower output controller 180 to operate the blower driving unit 130. ) To increase the output.

As such, when the output of the blower driving means 130 is increased or decreased by the blower output controller 180, the air can be provided in proportion to the amount of fuel supplied by the proportional control valve 40, and of course, the change of the weather. Therefore, it is possible to maintain a more efficient and stable ignition state by dealing with very flexible.

As described above, the present invention allows the blower driving means to be driven more precisely as the blower output controller controlled according to the analysis means of the controller. It will be able to maintain a more stable ignition state.

Claims (2)

Air flow rate setting means for setting the air flow rate to maintain the most suitable ignition state in the combustion chamber conditions of the gas boiler, Blower driving means for driving the blower 30 to supply the air flow rate set by the air flow rate setting means, Air flow rate sensor for measuring the amount of air supplied from the blower drive means for generating an electrical signal, the air flow rate input means for receiving the electrical signal output from the air flow sensor; Analysis means for analyzing whether or not the value of the signal inputted from the air flow rate input means coincides with the air flow rate set by the air flow rate setting means; And a blow correction means for variably operating the blower driving means so that the amount of air supplied from the blower matches the amount of air set by the air flow rate setting means based on the analysis result of the analysis means. The method of claim 1, And said blower correction means comprises an output controller for controlling the rotational speed of said blower drive means.

Images