KR200188230Y1 - A short protecting apparatus of gas boiler - Google Patents

Abstract

The present invention detects and controls the ground fault of the gas boiler to prevent the malfunction of the system that can occur in the gas boiler to prevent the risk of gas explosion in advance and to set the detection level (Level) to prevent ground faults. Prevents malfunction of detection and prevents overcurrent caused by lightning, which improves the safety of gas boilers and thereby increases productivity, increases heating efficiency, and extends the life of gas boilers, while improving customer satisfaction. It is characterized by providing the ground fault detection control device of the boiler.

Description

Gas boiler ground detection control device {A SHORT PROTECTING APPARATUS OF GAS BOILER}

The present invention relates to a ground fault detection control device for a gas boiler, and in particular, by detecting and controlling a ground fault in a gas boiler to prevent a malfunction of a system that may occur in the gas boiler, thereby preventing and detecting a risk of a gas explosion in advance. By setting the level, it prevents ground fault detection due to leakage current and prevents over current due to lightning, which improves the safety of the gas boiler and improves the productivity, as well as increases the heating efficiency and the life of the gas boiler. The present invention relates to a ground fault detection control device for a gas boiler that extends and improves customer satisfaction.

The electric wires in the conventional gas boilers are often grounded, which often causes malfunction of the system, and there is always a risk of gas explosion.

In addition, the boiler that detects the ground fault does not set the detection level, causing malfunction of the system due to leakage current, which may not guarantee safety, and may shorten the life of the gas boiler. There is always a problem of lowering and thus lowering productivity.

The present invention has been researched and created to fundamentally cure the problems of the conventional technologies as described above, and has the following objectives.

The present invention detects and controls the ground fault of the gas boiler to prevent the malfunction of the system that can occur in the gas boiler to prevent the risk of gas explosion in advance and to set the detection level (Level) to prevent ground faults. Prevents malfunction of detection and prevents overcurrent caused by lightning, which improves the safety of gas boilers and thereby increases productivity, increases heating efficiency, and extends the life of gas boilers, while improving customer satisfaction. The purpose is to provide a ground fault detection control device for the boiler.

1 is a schematic configuration diagram showing an interior of a gas boiler;

2 is a flowchart illustrating the present invention;

Figure 3 is a block diagram of the subject innovation is implemented,

4 is a detailed circuit diagram for implementing the present invention.

<Explanation of symbols for main parts of the drawings>

1: gas boiler 10: combustor

12 gas burner 13 fan

14: primary heat exchanger 16: frame rod

17: exhaust 20: water tank

26: circulation pump 30: secondary heat exchanger

51,52: Electronic valve 53: Proportional valve

TH1, TH2: Thermistor

The above object will be described in detail with reference to the accompanying drawings.

That is, Figure 1 shows a gas boiler (1) to which the present invention is applied, is installed in the casing (2) of the gas boiler (1) combustor (10) for burning the gas to heat the hot water for heating or hot water supply And a water tank 20 for storing heating circulation water and a secondary heat exchanger 30 having different paths for circulation of hot water and cold water.

In this case, a burner group 12 including a plurality of burners is formed in the casing 11 of the combustor 10, and a primary heat exchanger 14 is installed in an upper direction thereof to prevent overheating and the water passing therethrough. The burner group 12 is heated, a fan 13 for supplying combustion air is installed on the bottom surface of the combustor casing 11, and a thermistor TH3 is installed near the blower and the burner group In the vicinity of 12, a spark coupler 15 for igniting the burner group 12 and a frame rod 16 for detecting the ignition of the burner group are provided, and exhaust gas is discharged on the upper surface of the combustor casing 11. An exhaust 17 is formed through the casing 2 of the gas boiler 1.

In addition, a gas pipe 50 for supplying gas is installed below the burner group 12, and there are two electromagnetic valves 51 and 52 for passing gas at the time of energization and a proportional valve for adjusting the gas supply amount. 53 is provided from the upstream of the gas pipe 50 with respect to the gas supply path.

In addition, the water tank 20 has a high water level sensor 21 for detecting a high water level in the water tank, an overflow pipe 22 for discharging excess water, and a low water level sensor 32 for detecting a low water level in the pipeline. By recovering the heating water rotating the ondol floor, the water circulation pipe 24 for supplying water to the heating return pipe 24 in which the water separator 23 is installed and the primary heat exchanger 14 provides circulation of water. A circulation pump 26 for adjusting is provided in the downward direction.

On the other hand, the secondary heat exchanger 30 has a supply thermistor (TH1) and thermistor (TH2) for detecting the direct tapping temperature of hot water supplied to the user by releasing water through the tap water discharge tube 32, the gas boiler Direct inflow pipe installed with a water flow switch (33) for detecting the presence of water flow by the introduction of cold water from the outside and a mechanical automatic quantity control device to obtain a stable temperature characteristics by passing a certain amount according to the direct water temperature ( 34) and the water supply pipe 25 is connected to the heating hot water supply pipe 37 through which the water for heating passes through the three-way side (36).

In addition, between the heating return pipe 24 and the direct water inlet pipe 34 is provided with a tap water supply side 35 for replenishing water when the water tank 20 is insufficient, clogging of the heating filter, heating distributor The bypass pipe 38 is installed to prevent the pressure from rising inside the gas boiler and to circulate the flow of water by making the internal closed circuit of the gas boiler when the heating pipe is blocked.

In addition, the flow chart of the proportional valve control device of the gas boiler as shown in FIG.

A step for detecting whether a wire is grounded when the gas boiler is powered on, a step for detecting a leakage current which is set to a detection level when the ground fault is detected and causes a malfunction of the system, and among the signals for which the detection level is set Checking and determining whether the ground fault, and if the 'H' signal, which is a ground fault detection signal is inputted to remove the noise of the signal output from the above step is configured to stop the system.

In addition, Figure 3 and Figure 4 is a device in which the present invention is implemented, the power supply unit 100 for supplying AC power to the system of the gas boiler and to prevent damage to the device due to lightning strike, and when the power is applied from the power supply unit A ground fault detection unit 110 for detecting whether or not the ground fault is detected, a ground fault signal of the ground fault detection unit is set to a detection level, and a detection level setting unit 120 for blocking a leakage current causing a malfunction of the system, and the detection level setting A ground fault determination unit 130 for determining whether a ground fault has been detected by a negative signal, an input noise removal unit 140 that performs a filtering role to remove noise in an output signal of the ground decision unit, and the input noise Control unit 150 made of a microcomputer to control to stop the system when the 'H' signal of the signal output from the removal unit, and It consists of a system unit 160 that is driven and stopped by the output signal of the control unit.

The detection level setting unit 120 includes an electrolytic capacitor (CD) and a resistor (R1) configured in parallel to charge a leakage current that may cause a malfunction of the system.

In addition, the ground fault determiner 130 has a resistor R2 and a resistor R3 configured in parallel to the base terminal of the transistor Q, which is turned on when a signal is input, and is connected to the emitter terminal of the transistor Q. The collector terminal of the transistor Q is connected to a resistor R4 connected to a DC power supply Vcc.

In the present invention, when the power of the gas boiler is supplied (S1) detects whether the wire is grounded (S2) and the ground fault detection (S2) is set to the detection level (S3) leakage current causing a malfunction of the system Block (S4).

At this time, by checking whether the ground level is detected among the signals in which the detection level is set (S3) (S5), and removing the noise of the signal output in step 5 (S6), the 'H' signal, which is a ground detection signal, is outputted. The ground (S7) is made in order to stop the system (S8).

As described above, the present invention detects and controls the ground fault of the electric wire in the gas boiler to prevent the malfunction of the system that may occur in the gas boiler, thereby preventing the risk of gas explosion in advance, and the detection level (Level) It has the effect of preventing ground fault detection due to leakage current and preventing overcurrent caused by lightning, which improves the safety of the gas boiler and improves the productivity, as well as increases the heating efficiency and the life of the gas boiler. It is obvious that this is a very useful design that can simultaneously achieve various effects such as increasing the customer satisfaction and improving customer satisfaction.

Claims (3)

A power supply unit 100 for supplying AC power to the system of the gas boiler and preventing device damage due to a lightning strike, and a ground fault detector 110 for detecting whether a wire is grounded when power is applied from the power supply unit, and the ground fault Ground level detection unit for setting the ground fault signal of the detection unit to the detection level and cut off the leakage current causing the system malfunction, and ground fault for judging whether the ground fault is detected by the signal of the detection level setting unit Determination unit 130, the input noise removal unit 140 that performs a filtering role to remove noise in the output signal of the ground fault determination unit, and control to stop the system when the 'H' signal of the signal output from the input noise removal unit In order to drive and stop by the control unit 150 made of a microcomputer and the output signal of the control unit Ground detection control device for a gas boiler, characterized in that consisting of a stem 160. The method of claim 1, The detection level setting unit 120 is a ground fault detection control device for a gas boiler, characterized in that the electrolytic capacitor (CD) and the resistor (R1) for charging a leakage current that may cause a malfunction of the system is configured in parallel. The method of claim 1, The ground fault determiner 130 has a resistor R2 and a resistor R3 configured in parallel to the base terminal of the transistor Q, which is turned on when a signal is input, and is connected to the emitter terminal of the transistor Q, which is grounded. A ground fault detection control device for a gas boiler, characterized in that the collector end of the transistor (Q) is connected to a resistor (R4) connected to a DC power supply (Vcc).