JPS6064123A - Burning control device in vaporization burner - Google Patents

Abstract

PURPOSE:To control steadily the sequential process from the starting of natural burning to the moving for a vaporized burning at the starting of a burner, further, obtain the burning control device in the vaporizing burner having full automatic function. CONSTITUTION:At the pushing down of a start switch 21, clock terminals C of flip-flop circuits 22, 23 receive inputs, then outputs are generated at those output terminals Q. Those outputs are inputted into exclusive OR circuits 25, 26, then outputs are generated, a fuel oil pump 7 and a blower 5 are started, simultaneously, the natural burning is started by the operation of a natural burning igniter 12, a natural burning flame is generated in a gas generating cylinder 1. When the temperature of the natural burning is detected by a heat sensing body 18, an output from a comparator 27 is inputted to the clock terminal C of a flip-flop circuit 29, the output generated at the output terminal Q thereof is inputted to exclusive OR circuits 25, 26, then the fuel pump 7 and the blower 5 are stopped. After passage of time preset by a timer 30 (natural burning flame vanishing time), a resetting terminal R of the flip-flop circuit 29 receives an input, the fuel pump 7 and blower 5 are restarted, simultaneously, the vaporizing burning igniter 17 is operated, flame injecting ports 14 of burning cylinders 2, 2 are ignited, thereafter, the vaporized burning condition is continued.

Description

Detailed Description of the Invention The present invention provides operational control from burner startup to vaporization combustion in a vaporization burner that burns fuel live and heats it to a set temperature, then shifts to vaporization combustion to continue combustion. The present invention relates to a combustion control device for reliably and automatically controlling combustion.

Conventionally, a gas generating cylinder and a combustion cylinder communicating with the gas generating cylinder via a communication pipe have been used. A vaporizing burner, which supplies fuel to a gas generating cylinder to transition from initial raw combustion to vaporizing combustion and to continue combustion, was first developed and put into practical use by the present applicant, and is already well known.

By the way, in the above-mentioned conventional vaporizing burner, when starting the burner, there are several steps: starting the supply of fuel and combustion air, ignition to cause live combustion, heating to a set temperature by live combustion, ignition and vaporization to cause vaporizing combustion. Since it requires an extremely complex series of controls, such as monitoring the combustion flame after transition to combustion, it has the disadvantage that it is not easy to operate at start-up, or that abnormal combustion can easily occur due to incorrect or inappropriate operation. .

Therefore, in order to eliminate the above-mentioned drawbacks of conventionally known vaporizing burners, the present invention ensures that a series of controls from the start of raw combustion to transition to vaporizing combustion are reliably and automatically performed when starting the burner. The object of the present invention is to obtain a combustion control device for a vaporizing burner that can be used.

In view of the foregoing, in order to achieve the above object, the present invention has a structure that includes a gas generating cylinder and a combustion cylinder that communicates with the gas generating cylinder via a communication pipe, and supplies fuel to the gas generating cylinder and initializes the gas generating cylinder. In a device that continues combustion by transitioning from raw combustion to vaporization combustion, a fuel pump that supplies fuel to the gas generating cylinder, a blower that supplies combustion air, a main combustion igniter, and a vaporization combustion igniter are installed. The operation is controlled in such a sequence that when the burner is started, live combustion is caused in the gas generator cylinder, and after heating to the set temperature, the raw combustion flame is extinguished, and then immediately transitions to vaporization combustion! This is a combustion control device for a vaporizing burner characterized by having a control circuit configured. According to this device, when starting the burner, simply pressing a start switch allows the supply of fuel and combustion air to be controlled. It is possible to automatically perform a series of controls such as stopping, igniting the flame that causes raw combustion, heating up to the set temperature, and transitioning to vaporization combustion after the raw combustion flame has disappeared. It has the effect of being easy and reliable.

Hereinafter, a preferred embodiment of the present invention 8A1 (combustion control device for a vaporizing burner) shown in the accompanying drawings will be explained.

In FIGS. 1 to 3, reference numeral 1 indicates a gas generating tube installed horizontally, and 2 and 2 indicate combustion tubes installed in parallel on both sides of the gas generating tube. The rear ends of 2 are connected to each other via a communication pipe 3.A blower tube 4 is connected to the rear end of the gas generating tube 1, and a combustion tube 4 is connected to the starting end of the blower tube 4. A blower 5 that supplies air is connected. Reference numeral 6 denotes a fuel supply pipe that supplies fuel oil to the rear end of the gas generating cylinder 1. The fuel supply pipe 6 is connected to a fuel pump T. The tip of 6 is an oil injection port 8. 9 is an air diffusion vane, and the air diffusion vane 9 is arranged to form an air passage 10 within the tip of the blast tube 4. Reference numeral 11 denotes a main combustion spark plug 11, which is provided close to the oil injection port 8 and connected to a main combustion igniter 12.On the other hand, each combustion cylinder 2 has a gas chamber 13 inside, and the upper surface force of the combustion tube 2
A large number of slit-shaped flame nozzles 14 are formed on the surface facing the gas generating cylinder 1, and smoke blast plates 15 are formed protruding from both ends thereof.

16.16 is a spark plug for vaporization combustion, and the spark plug 16.16 for vaporization combustion is arranged at the front end of the combustion tubes 2, 2,
These are connected to an igniter 11 for vaporization combustion. 18
is a heat sensitive body, and the heat sensitive body 18 is attached to the outer wall surface of the communication pipe 3, and is used to detect the heating set temperature due to raw combustion. 19 is a backfire safety thermostat,
The flashback safety thermostat 19 is mounted at an appropriate position on the outer wall surface of the gas generator #J1. Note that 20 is a flame eye for monitoring the live combustion flame in the gas generating cylinder 1.

FIGS. 4 and 5 show other examples of the vaporization nozzle.
A combustion tube 2' is disposed concentrically on the outer periphery of the combustion chamber 2', and is communicated with the combustion tube 2' through a communication pipe 3'. Note that parts with the same reference numerals as in the above embodiment have the same configuration, and parts with the same reference numerals with a dash indicate similar configurations that correspond to each other.

FIG. 6 illustrates the circuit of the combustion control device for the vaporizing burner described above. In the circuit shown in this figure, 21 is a start switch, 22.23 is a D-type 7-lip-flop circuit, 24 is a timer for setting the operating time of the main combustion igniter 12, and 25.26 is an exclusive OR circuit. These circuit elements constitute a control circuit for the blower 5, the fuel bonfire, and the main combustion igniter 12.

Also, 2T is a comparator, 28 is an amplifier circuit, and 29 is D
30 is a timer for setting the raw combustion flame extinguishing time, and 31 is a timer for setting the operating time of the igniter 1T for vaporizing combustion. These circuit elements change the transition from raw combustion to vaporizing combustion. A control circuit for the transition stop is configured.

32 is a comparator, 33 is an amplifier circuit, which inputs the input from the backfire safety thermostat 19 to the controller 32, and when an output is generated, the 7 lip-flop circuit 22
．． 23, the fuel pump T and blower 5 are stopped, the supply of fuel and combustion air is cut off, and safety is ensured.

The flame eye 20 detects whether or not the ecological slash-and-burn cultivation is normal when starting the burner, and whether or not the ecological slash-and-burn remains when transitioning to vaporization combustion. In the event of an abnormality, the ignition operation is repeated, the supply of fuel and combustion air is stopped, etc., to ensure combustion safety.

I will explain the effect of next busyness.

Now, when the vaporizing burner is started, the fuel pump T and the blower 5 are started, fuel is supplied from the oil injection port 8 of the fuel supply pipe 6 into the gas generating cylinder 1, and combustion air is supplied to the blower cylinder 4. The gas is then supplied into the gas generating cylinder 1 while being diffused by the air supply diffusion vanes 9. At the same time, the main combustion igniter 12 operates and the ecological combustion igniter 11
A snow leak occurs, the fuel is ignited, and ecological slash-and-burn occurs within the gas generator 1. After the gas generating tube 1, communication pipe 3, and combustion tubes 2, 2 are heated to the required set temperature for transition to vaporization combustion by this ecological slash-and-burn, the fuel pump T and blower 5 are temporarily stopped, and the ecological slash-and-burn cultivation is performed. When the gas disappears, the fuel pump 7 and the blower 5 are started again to supply fuel and combustion air, and at the same time the igniter 11 for vaporization combustion is activated, a spark is generated at the ignition plug 16, 16 for vaporization combustion. The vaporized mixture gas stored in the gas chamber 13 of combustion fm2, 2 is ignited from the gas generating tube 1 through the communication pipe 3, and vaporized combustion (blue flame combustion). Thereafter, the gas generating cylinder 1 continues to be heated by this vaporizing combustion flame, and the vaporizing combustion state continues.Next, the control operation at the time of starting the burner will be explained with reference to the combustion control circuit shown in FIG. 6.

First, when the start switch 21 is pressed to start the burner, the input is input to the clock terminal C of the flip-flop circuit 22.23, and an output is generated at the output Q terminal of the flip-flop circuit 22.23. An output is generated therein, the fuel pump 7 and the blower 5 are activated, and the gas generating cylinder 1 is supplied with fuel and combustion air. and,
At the same time, the main combustion igniter 12 is operated to ignite live combustion, and ecological slash-and-burn cultivation occurs within the gas generator 1. Through this ecological slash-and-burn cultivation, the gas generating tube 1, combustion tubes 2, 2, and communication pipe 3 are heated to the required set temperature for transition to vaporization combustion, and when that temperature is detected by the heat sensitive element 18,
Output from comparator 27 and flip-flop circuit 2
9 is input to the clock terminal C, and the output generated at the output Q terminal is input to the exclusive OR circuit 25.26,
The fuel pump 1 and the blower 5 are stopped, and the supply of fuel and combustion air is temporarily cut off. Then, when the set time of the timer 30 (the ecological slash-and-burn disappearing time) has elapsed, the igniter 1γ for vaporization combustion is input to the reset terminal R of the flip-flop circuit 29, and the output of the output Q terminal disappears. It operates for a set time to ignite the flame nozzles 14 of the combustion tubes 2, 2, and thereafter the vaporization combustion state continues.

If flashback combustion occurs in the gas generating cylinder 1 and it becomes overheated during vaporization combustion, the flashback safety thermostat 19 will operate and an output signal will be sent from the comparator 32, causing the flip-flop Since the pump circuit 22,23 is reset, the fuel pump 7 and the blower 5 are immediately stopped, the supply of fuel and combustion air is cut off, and the safety of the burner is ensured.

As described above, according to the combustion control device shown in FIG. 6, by simply pressing the start switch 21 to start the burner, supply and stop of fuel and combustion air, ignition for producing live combustion, and It is possible to automatically perform a series of controls such as heating to a set temperature and transitioning to vaporization combustion after the ecological slash-and-burn has disappeared.

[Brief explanation of drawings]

The drawings show an embodiment of the device related to the BAK of the present invention, and FIG. 1 is a partially cutaway plan view of the vaporizing burner;
Fig. 2 is a side view of the same as above, Fig. 3 is a longitudinal sectional front view of the same as above, Fig. 4 is a longitudinal sectional side view showing the other side of the vaporizing burner, Fig. 5 is a front view of the same as above, and Fig. 6 is an example of the combustion control device. FIG. DESCRIPTION OF SYMBOLS 1... Gas generating tube, 2, 2... Combustion tube, 3... Communication pipe, 5... Blower, 7... Fuel pump, 12...
・Igniter for ecological combustion, 17...Igniter for vaporization combustion, 18
...Thermal body, 19...Flashback safety thermostat, 2
1... Starting switch patent applicant Dowa Co., Ltd.

Claims (1)

[Claims] A device that is equipped with a gas generating cylinder and a combustion cylinder that communicates with the gas generating cylinder via a communication pipe, supplies fuel to the gas generating cylinder to transition from initial raw combustion to vaporized combustion, and continues combustion. A fuel pump that supplies fuel to the cylinder, a blower that supplies combustion air, a main combustion igniter, and a vaporization combustion igniter are installed, and when the burner is started, live combustion is generated in the gas generating cylinder, and the settings are set. A combustion control device for a vaporizing burner characterized by configuring a control circuit that controls the operation in the order in which the combustion flame is once extinguished after heating to a temperature, and then immediately shifts to vaporizing combustion.