KR0157199B1 - Gas boiler controlling apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas boiler control apparatus, and more particularly, to a gas boiler main controller that controls the exhaust fan rotation by using a voltage change to suppress noise and vibration when the exhaust fan is driven and to eliminate the field error of the exhaust fan.

Flame detection unit to stop the burner operation by partially canceling the voltage when the short circuit in the boiler body, such as when a flame occurs, and gas detection unit to send gas information to the room temperature controller by stopping the burner operation, The flame detection unit has the advantage of offsetting the voltage when the short circuit in the boiler body is detected along with the flame detection. The flame detection unit has the advantage of changing the voltage by using a variable resistor. It is easy to set the rotational capacity of the fan, and the electrical energy is converted into mechanical energy by the Hall sensor using magnetic force in the fan's rotation speed sensing unit, which can eliminate errors in the operation of the drive monitor in driving the fan. At the starter of the exhaust fan, the driving motor rotates according to the voltage change. Since it operates uniformly, it eliminates the vibration and noise of the fan. In addition, by controlling the integrated circuit (IC) and the reference potential by comparison, it is effective to control the fan speed and voltage frequency at the same time.

Description

Gas boiler control device

A block diagram showing the circuit configuration of the present invention in the first drawing.

(A) of FIG. 2 is a circuit diagram of a control configuration of the present invention.

(b) is a circuit diagram connected to (a).

* Explanation of symbols for main parts of the drawings

10: power supply unit 20: flame detection unit

30: low water level 40: power transmission unit

50: new transmitter 60: signal receiver

70: temperature detection unit 80: gas detection unit

90: main controller monitoring unit 100: lamp output unit

110: output unit 120: switching switch

130: exhaust fan capacity setting unit 140: exhaust fan rotation speed detection unit

150: ventilating unit eastern part 160: ventilator rotation speed control unit

170: power supply short circuit detection circuit 180: main controller

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas boiler control apparatus, and more particularly, to a gas boiler main controller that controls the exhaust fan rotation by using a voltage change to suppress noise and vibration during driving of the exhaust fan and to remove an operation error of the exhaust fan.

In general, the blower has a structure in which a gas and air are simultaneously pushed in a combustion chamber at the bottom of the boiler, or a blower structure in which a gas to be burned is sucked from the upper portion of the boiler and discharged into a communication system.

This conventional configuration has a problem in that it is irregular in exchanging the gas and air in the combustion chamber and causes a bad combustion state due to suction of too much air or forced discharge.

An object of the present invention for solving the conventional problems as described above is an exhaust fan rotational speed detecting unit for detecting the exhaust fan rotational speed by using a variable sensor and the hall sensor (hall sensor) can be set with a variable resistance of the exhaust fan rotation The exhaust fan starting part controlled by the circuit according to the state and the exhaust fan rotation speed control unit whose rotation speed is changed according to the comparison of the potential and the reference potential of the integrated circuit induce uniform intake and discharge of gas and air To increase combustion efficiency.

Hereinafter, described in detail the technical configuration of the present invention attached.

As shown in FIG. 1, a power supply unit 10, to which power designated by a stable power supply IC is supplied to each circuit, a flame detection unit 20 which detects a state of a flame and is controlled by a voltage change, and a constant water level The low water level detector 30, which operates the low water level sensor, and the power transmitter 40 for supplying power to the room temperature controller using a variable constant voltage IC, and the signal transmitted from the main controller 180 are determined by each element. A signal transmitter 50 for transmitting a signal to the anode end, a receiver 60 which is amplified by the inverter and input to the main controller 180 by the inverter, and the thermistor sensor detects temperature and overheating. When the oscillation is stopped from the temperature sensing unit 70, the gas sensing unit 80 controlled by sensing a gas by the circuit, and the main controller 180, the main controller 180 becomes a low voltage and a high voltage. Restart) The main control circuit 90, the lamp output unit 100 with a power lamp to check the temperature and function operation status in the main controller 180, and the output unit 110 for driving the control output relay for each function And, the switching switch 120 for setting according to the amount of air blower, the exhaust fan capacity setting unit 130 is set by the change amount of the variable resistance, and the rotational speed sensing unit 140, the rotation speed is sensed by the Hall sensor ), An exhaust fan starting unit 150 in which the motor is operated according to the rotation state, an exhaust fan rotation speed controller 160 whose rotation speed is changed according to the comparison of the potential and the reference potential of the integrated circuit, and the line of the room temperature controller. In case of short circuit, it is composed of a transmission power short circuit detecting unit 170 which senses the inside of the IC and drives the transistor base terminal through a resistor and a diode to disconnect the current of the safety garden (IC). The features.

Referring to the effects of the present invention having such a configuration in detail as follows.

As shown in FIG. 2, in the operation of the circuit of the present invention, the power supply unit 10 receives the AC voltage input through the transformer through the bridge diodes D1 to D4, smoothed by a capacitor, and a specified voltage by the IC. It is supplied to each circuit.

In the flame detection unit 20, when no flame is generated, the DC voltage 5V voltage is partially offset by the resistance, and a high voltage is applied to the main controller.

When flame is detected, AC voltage flows from several hundreds to several tens of current through flame rectification from flame sensor to boiler body, and the voltage is strengthened by resistance. When DC voltage is offset to 5V, DC voltage of 1.5V Low voltage is input to the main controller.

In addition, when the flame detection sensor is shorted with the boiler body, AC voltage 150V flows directly to the flame detection sensor and the body without rectifying action, and the DC voltage is partially canceled by resistance, and the main voltage is about 2.5V ~ 3.5V. It is input to the machine to stop the burner operation, the short-circuit phenomenon caused by the water between the flame sensor and the boiler body will also operate as described above.

In the low water level detector 30, when a high voltage output is applied to the main controller 180 as the low water output stage, the PC 2 (PHOTO COUPLER) is turned on, and the transformer 9V stage is the low water level sensor (LOW). WATER SENSOR) and resistors and capacitors drive PCI (PHOTO COUPLER). Therefore, when the light emitting diode of the PCI is driven, the TR stage is turned on, and the low level pulse input goes low. In this way, when low is inputted to the low level pulse input when outputting high to the low level output stage from the main controller 180, it is regarded as having a certain level and operates normally. Done.

This is because no current flows into the low water circuit, and the circuit cuts off the DC power supply by the capacitor.

The power transmitter 40 controls the power supply to the room temperature controller in the best state by varying the constant voltage through IC3 to stabilize the power for transmission.

In the signal transmitter 50, the signal transmitted from the main controller 180 operates Q1 and Q1 switches the variable terminal of IC1 to low and high, thereby transmitting signals to both voltage terminals.

In the signal receiving unit 60, the input signal manipulated indoors drives the base end of Q2 by the resistance inputted through the negative voltage terminal, and this signal is safely and amplified in Q2 by the inverter circuits IC2B and IC2C. The power is reversely amplified and input to the main controller 180.

The temperature sensing unit 70 is composed of a temperature sensor for detecting a certain temperature, and an overheat sensor for detecting a predetermined temperature or more, and the temperature sensor decreases the resistance value when the temperature rises, thereby decreasing the voltage and decreasing the voltage value due to the resistance. The master controller 180 reads and controls the seasons and functions in which the input manipulated indoors is received.

In addition, the overheat sensor (OVER HENTING SENSOR) will stop all the functions of the boiler when the temperature rises above a certain temperature.

Gas detection unit 80 is a high-voltage signal is input to the main controller during gas detection to stop the burner operation and send a gas alarm to the room temperature controller, when the gas detection sensor is small resistance and by the resistance element The voltage divider outputs a high voltage to the comparator amplifier. The compensation resistor reduces power proportionally when the ambient temperature is higher than the maximum allowable temperature due to the natural environment and a heating element such as an engine motor. Therefore, the compensation resistor operates to maintain a constant sensitivity of the gas sensor according to the change of the ambient temperature.

The main controller detecting unit 90 drives the Q32 (transistor) output from the main controller 180 through a capacitor, a diode, and a resistor, and VDD flows from the emitter of the Q43 to the collector. This current becomes the relay drive voltage to the output. If the main controller 180 stops oscillating, the relay driving voltage is cut off at Q42, so the output voltage is automatically cut off. In addition, in the normal state where the collector potential of Q41 is 0V, the base of Q42 is applied with a low voltage, so that IC4 always receives a reference potential through the resistor, but when oscillation is stopped from the main controller, the collector of Q41 is applied with a high voltage. By driving Q31 through a resistor, IC4 instantaneously generates a low voltage and a high voltage to reset the main controller.

Lamp output unit 100 was attached to the lamp power lamp for each burner circulation pump temperature in order to check each temperature and function operating state in the main controller (12).

In particular, the power lamp indicates this state when the boiler is abnormal, so that the main controller 12 can check whether there is an abnormality.

The output unit 110 relays and outputs signals for each function of the fan motor, the ignition transformer, the oil pump, the circulation pump, and the water supply valve.

In the switching switch 120, the user must set the air flow rate according to the air flow rate of the boiler to accurately detect the high limit revolutions per minute and the low limit revolutions per minute. The lower part (FSF1, FSF2, FSF3) is also used to finely adjust the fan speed by changing the position.

When the voltage is changed by the dropping voltage of the exhaust fan capacity setting unit 130, the rotational speed of the exhaust fan is changed, and the exhaust fan capacity can be set by changing the semi-fixed variable resistor contained in the exhaust fan.

In the exhaust fan rotational speed detection unit 140, the Hall sensor (Hall Sensor) mounted on the exhaust fan is a low voltage and high voltage output according to the magnetic force N pole, S pole. Therefore, the output will change the sphere and pulse frequency in accordance with the change in the rotation speed of the fan.

In the initial stage 150, when the VF (voltage frequency) is applied to the inverter IC, a high voltage is applied to the inverter IC to be output to drive the transformer TR, and current flows into the L1 from the fan motor L2. After this operation process, when the fan motor rotates for 1/4 rpm, the inverter outputs a low voltage to the inverter IC and the transistor operates, and the fan motor flows from L1 to L2.

In the fan fan speed control unit 160, if the voltage frequency (VF) is varied, the fan fan speed changes. At this time, the positive electrode potential of the electrolytic capacitor changes according to the fan fan speed, so that the electric potential of IC3 also changes. do. The output voltage changes according to the potential difference with the IC3 reference potential, and is then compared with the reference potential of IC3 to control the transistor to control the potential of the voltage frequency.

In the short-circuit detection circuit 170 of the power output unit, when the short circuit occurs due to a short circuit due to the short circuit of the room temperature controller, the voltage is decreased when the short circuit occurs to prevent the component from being damaged due to the short circuit. It senses and drives the base of Q1 through resistor and diode, and it lowers the voltage of IC1 by bringing down the current of IC1. Therefore, even if the thermostat wire is shorted, the voltage is automatically down, so there is no effect on the parts, thus protecting them from damage or destruction.

The delay time (1 ~ 2 seconds) is given by (C4) so that it does not operate on a short circuit or noise signal. In this invention, the flame detection unit has the advantage of canceling the voltage when the short circuit in the boiler body with the flame detection, and the setting of the rotational capacity of the blower by changing the voltage using a variable resistor to facilitate the blower capacity. In the fan rotation speed sensing unit, the electrical energy is converted into mechanical energy by the Hall sensor using magnetic force, which can eliminate errors in the operation of the driving motor in driving the fan. As the rotation state is operated uniformly, the vibration and noise of the fan are eliminated. In addition, by controlling the integrated circuit (IC) and the reference potential by comparison, it is a novel useful invention to simultaneously control the exhaust fan rotation speed and voltage frequency.

Claims (1)

In controlling the gas boiler, the flame detection unit 20 stops the burner operation by partially canceling the voltage when the short circuit occurs in the boiler body, such as when a flame is generated, and the gas alarm is applied to the room temperature controller by stopping the burner operation. The gas detector 80 to be transmitted, the exhaust fan capacity setting unit 130 to control the exhaust fan rotation speed by the voltage change, and the exhaust fan rotation speed detection unit 140 for detecting the exhaust fan rotation speed using a hall sensor And a fan blower starting unit 150 controlled by a circuit according to the fan fan rotating state, and a fan blower speed control unit 160 whose rotation speed is changed according to the comparison of the potential and the reference potential of the integrated circuit. Control device of gas boiler.