KR940001422Y1 - Exhaust gas strangeness temperature perception device - Google Patents

Abstract

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Description

Exhaust Gas Abnormal Temperature Sensor

1 is a schematic structural diagram of a natural exhaust boiler of the present invention.

2 is an internal and external abnormal temperature comparison circuit diagram of the present invention.

3 is a flow chart for the present invention.

* Explanation of symbols for main parts of the drawings

1: Governor 2: Burner

3: road 4: waste gas

5: boiler 6: internal temperature sensor

7: external temperature sensor 8: sensing circuit and delay circuit

10: voltage amplifier 20: governor operation blocking unit

30: comparison unit 40: relay drive unit

50: timer circuit W1, W2: reverse wind detection line

W3: Abnormal temperature sensing line Amp: Voltage amplifier

OP1, OP2: Comparator Q1: Transistor

RY: Relay S1: Contact switch of relay (RY)

The present invention relates to an exhaust gas abnormality temperature sensing device capable of detecting an abnormal temperature of the exhaust gas by using a temperature sensor inside and outside the boiler exhaust.

Conventionally, since waste gas generated during the combustion of a natural exhaust boiler is not discharged normally due to air pressure or backwind, the waste gas flows back into the room, thereby causing a serious damage to fire or human life due to the backflow of waste gas. In addition, there is a problem such as shortening the life of the boiler due to an abnormal overheating phenomenon of the reverse wind and flue when operating the boiler.

Therefore, the present proposal made to solve the above problems is to provide an exhaust gas abnormal temperature sensing device to detect the abnormal temperature of the exhaust gas by using a temperature sensor inside and outside the boiler exhaust.

In other words, the present invention detects the temperature of the waste gas flowing out through the flue during the operation of the boiler and the temperature of the communication outside to detect the internal and external temperature difference when the internal and external temperature difference is different during normal combustion. The sensing circuit blocks the governor to prevent further outflow of waste gas, and during the initial operation of the boiler, the temperature difference between the inside and outside of the communication delays the reaching time to the normal temperature by a delay circuit for a certain time. By preventing the unstable operation of the boiler in advance, it is possible to prevent fire or fatal damage to human life due to the backflow of waste gas, and also to detect the abnormal overheating of the back wind and flue during the operation of the boiler to extend the life of the boiler. It is.

If this detailed description of the draft by the accompanying drawings as follows.

1 is a schematic structural diagram of a natural exhaust boiler, in a natural exhaust boiler comprising a conventional governor (1), a burner (2), and a flue (3) for discharging waste gas, through flue (3) in communication. An internal temperature sensor 6 for sensing the temperature of the outflowing waste gas 4 and an external temperature sensor 7 for sensing the temperature outside the communication are respectively provided, and the internal temperature sensor 6 and the external temperature sensor 7 are respectively provided. ) And a delay circuit 8 for preventing the unstable operation of the boiler and a detection circuit 8 for detecting the temperature difference between the internal and external temperatures during normal combustion through the reverse wind detection lines W1 and W2. The sensing circuit and the delay circuit (8) is connected to the governor (1) to prevent the outflow of further waste gas by blocking the governor when the temperature difference between the internal and external during normal combustion is different through the abnormal temperature sensing line (W3) It is configured by.

FIG. 2 is an internal and external abnormal temperature comparison circuit diagram that compares an abnormal temperature of exhaust gas using internal and external temperature sensors. As shown in FIG. 2, the internal temperature sensor 6 and the external temperature sensor 7 The voltage amplification unit 10 and the overheat generator governor amplify the temperature voltage difference between the internal and external temperature sensors 6 and 7 through the contact pin terminals ①, ②, ③ and④. A control unit 20 is connected to a governor operation blocking unit 20 to block operation, and the voltage amplifier 10 compares the voltage amplified by the voltage amplification unit with a reference voltage Vref and outputs a compared signal. 30 is connected to the comparator 30 and the governor operation cut-off unit 20 to connect the relay driver 40 to block the operation of the governor 1, and the 2 of the power transformer T1. On the vehicle side, a regulator (REG) for maintaining the DC voltage rectified through the bridge diode (BD) at a constant voltage ) And the regulator REG is configured by connecting to the comparator 30 and a timer circuit 50 for operating the boiler in an initial state.

When described in detail by the accompanying drawings the effect of the present invention configured as described above are as follows.

First, as shown in FIG. 1, the temperature of the waste gas 4 flowing through the flue 3 during the operation of the boiler is detected by the internal temperature sensor 6, and the temperature outside the communication is sensed by the external temperature sensor 7. .

As such, the temperature sensed by the internal and external temperature sensors 6 and 7 flows through the reverse wind detection lines W1 and W2. In this case, the difference between the internal and external temperature voltages is detected by the detection circuit 8. Abnormal temperature detection line when the difference in temperature detected inside and outside is different, that is, when back wind or flue is blocked, or when the temperature difference at normal combustion is different when the heat exchanger is blocked or other types of gas are used. By blocking the governor (1) through (W3) to prevent the further outflow of waste gas and at the same time the temperature of the waste gas sensed by the internal temperature sensor 6 and the temperature outside the communication sensed by the external temperature sensor (7) The delay time until the temperature difference reaches the normal temperature is delayed by the delay circuit 8 for a predetermined time to prevent the unstable operation of the boiler.

On the other hand, Figure 2 is a comparison circuit diagram for comparing the abnormal temperature of the exhaust gas by using the internal and external temperature sensors are divided into a voltage amplifier for amplifying the temperature voltage difference between the internal and external temperature sensors (6), (7) 10), the governor operation blocking unit 20 for blocking the operation of the governor in the event of overheating, and a comparison unit for comparing the voltage amplified by the voltage amplifier and the reference voltage Vref and outputting the compared signal ( 30, a relay driver 40 for interrupting the operation of the governor 1, and a timer circuit 50 for operating the boiler in the initial state.

That is, the present invention is the AC voltage down to the secondary side of the power transformer (T1) is rectified to the DC voltage by the bridge diode (BD) and the rectified DC voltage can operate the boiler in the initial state through the regulator (REG). The relay RY is driven by being applied to the timer T and applied to the relay RY in the relay driver 40, and the contact switch S1 of the relay RY is operated by the relay RY. Connected to B).

At this time, AC power is applied to the solenoid (SOL) in the governor (1) through the contact switch (S1) of the relay (RY) and the pin terminal (⑤) of the connector (CON2) to drive the solenoid to operate the boiler.

In this state, the internal and external temperature sensors 6 and 7 detect the temperature of the waste gas 4 and the communication external temperature which flow out through the flue 3 during boiler operation, respectively, during normal combustion. If the external temperature difference is different, that is, when the back wind or flue is blocked, or when the heat exchanger is blocked or other types of gas are used, the temperature difference between the normal combustion and the temperature difference is different from that of the connector (CON1). And (4) are input to the amplifier Amp in the voltage amplifier 10, and the amplifier Amp amplifies and outputs the temperature voltage difference between the internal and external temperature sensors 6 and 7.

The voltage amplified by the amplifier Amp is input to the non-inverting (+) terminal of the comparator OP1 in the comparator 30. In the comparator OP1, the voltage inputted to the non-inverting (+) terminal and the input inverting ( -) Compares with the reference voltage (Vref) of the terminal and outputs the compared signal.

That is, the voltage of the input non-inverting (+) terminal of the comparator OP1 is larger than the reference voltage of the input inverting (-) terminal of the comparator OP1, and the comparator OP1 outputs a high (H) signal. If the reference voltage is greater than the voltage of the non-inverting (+) terminal, a low (L) signal is output.

However, the comparator OP1 outputs a high (H) signal because the voltage of its non-inverting (+) terminal is greater than that of the inverting (-) terminal.

As such, the high (H) signal output from the comparator OP1 is applied to the base of the transistor Q1 in the relay driver 40 so that the transistor Q1 is turned on. Therefore, the relay RY is also driven to drive the relay RY. The contact switch (S1) is connected to the contact (A) again to stop the operation of the solenoid (SOL) in the governor (1) to stop the operation of the boiler.

On the other hand, Figure 3 is a flow chart for the present invention, by checking whether or not the ignition signal by the step 1, if not the ignition signal is returned to the standby state (step 2), the ignition signal and the governor at the same time (step 3) Operate the delay timer (step 4), and if the delay time has elapsed, send it to the ignition stage 1, and if it does not pass the delay time (step 5), send it to the temperature sensing circuit to check whether the temperature is normal. To detect (step 6) if the temperature is not normal (off step 7), thus generating an alarm sound (step 8) to stop the boiler operation (step 9) and to operate the boiler if the temperature is normal. (Step 10).

This work, which is operated as above, prevents the waste gas generated during the combustion of the boiler from being discharged to the year due to air pressure or backwind and prevents the waste gas from flowing back into the room. In addition to preventing the oil in advance, it also has the effect of extending the life of the boiler by detecting abnormal overheating of the flue and flue during the operation of the boiler.

Claims (2)

In a natural exhaust boiler consisting of a normal governor (1), a burner (2), and a flue (3) for discharging waste gas (4), the temperature of the waste gas (4) flowing out through the flue (3) is communicated with the flue gas. The internal temperature sensor 6 for sensing and the external temperature sensor 7 for sensing the temperature outside the communication are respectively installed, and the reverse wind detection line W1 is disposed on the internal temperature sensor 6 and the external temperature sensor 7, ( W2) connects the detection circuit 8 for detecting the internal and external temperature voltage difference during normal combustion and the delay circuit 8 for preventing the unstable operation of the boiler. Exhaust gas abnormal temperature sensing device, characterized in that configured to connect to the governor (1) when the temperature difference between the internal and external during normal combustion through the abnormal temperature detection line (W3). According to claim 1, wherein the voltage amplifier 10 for amplifying the temperature voltage difference between the internal and external temperature sensors (6), (7), and the governor operation blocking unit for blocking the operation of the governor when overheating occurs 20 and the comparison unit 30 for outputting the compared signal by comparing the voltage amplified by the voltage amplification unit with the reference voltage (Vref), the relay driver 40 to block the operation of the governor and in the initial state Exhaust gas abnormality temperature sensing device comprising a timer circuit (50) for operating the boiler.