JPH0631313Y2 - Ignition device for pot type oil combustor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pot type oil combustor capable of performing steady combustion in a short time after ignition.

[Conventional technology]

This kind of pot-type oil combustor sends fuel into the pot,
The fuel flowing into the pot is vaporized and ignited by the ignition device, and the temperature of the pot needs to be raised by the combustion heat of the ignited fuel. Therefore, it took several minutes to change from a small flow rate at ignition to a large flow rate for steady combustion. In addition, it is desirable to ignite with a flame as small as possible in order to ignite quickly, but immediately after ignition, the inside of the pot is cooled, and the fuel that has flowed into the pot may be stored in the pot. Since vaporization and combustion are performed suddenly when possible, the pot needs to be relatively large so that abnormal combustion does not occur at the time of combustion.

In order to prevent this drawback and perform steady combustion immediately after ignition, the pot has been previously electrically preheated, and in a small pot type combustor, a method of heating the pot by energizing a tertile preheater has been proposed. It is used.

[Problems to be solved by the invention]

By the way, in the structure in which the preheating heater is attached to the pot, the heater shape and mounting position are complicated in order to obtain uniform preheating. In addition, in order to burn at a steady combustion position immediately after ignition using a preheat heater, the flow rate cannot be reduced below the weak combustion flow rate at the time of combustion, and if ignition delay occurs, the fuel stored after ignition burns at once. The igniter that preheats the pot cannot be used in all pot-type oil combustors.

[Means for solving problems]

This invention eliminates the oil pool immediately after ignition of a pot-type oil combustor and enables quick steady combustion. 1 is an air passage to which combustion air is supplied, and 2 is a device in the air passage 1. A pot 3 having an air hole 2'opened in its side wall is a blower for supplying combustion air to the air passage 1. 4 is a fuel pump, 8 is an oil tank to which the fuel pump 4 is attached, 9 is a fuel pipe, and the fuel in the oil tank 8 is sent to the pot 2 by the fuel pump 4 via the fuel pipe 9.

Reference numeral 5 is an igniter mounted in the pot 2, 10 is a control plate positioned in the pot 2, 6 is a flame detector mounted on the top of the pot 2, and the fuel sent to the pot 2 is an ignition that turns red. The heat of combustion ignited by the vessel 5 heats the bottom surface of the pot 2, and the amount of vaporization of the fuel flowing into the pot 2 increases, and when the flame rises upward, the control plate 10 stably burns at a steady position. To do.

By the way, the present invention is not limited to the fuel pump 4.
Is attached with a timer 7 for stopping the operation for a certain time, and the output signal of the flame detector 6 is connected as a control input signal of the timer 7.

[Explanation of action]

In this invention having the above-described configuration, when the blower 3, the fuel pump 4 and the igniter 5 are energized, the fuel sent into the pot 2 is ignited by the igniter 5 and the combustion is started by the air supplied by the blower 3. . When the bottom surface of the pot 2 is heated by the combustion flame burning around the igniter 5 mounted near the bottom surface of the pot 2, vaporization is accelerated and the combustion flame becomes large.
Eventually, it rises near the control plate 10 above the pot 2.

Therefore, the flame detector 6 attached to the upper portion of the pot 2 detects the presence of the flame at a relatively early time and outputs this output to the timer 7. The timer 7 which receives the signal from the flame detector 6 forcibly stops the operation of the fuel pump 4 for a fixed time of about 15 to 30 seconds.

By this time, a larger amount of fuel than has been used for combustion has been supplied to the pot 2, so even if fuel cannot be sent from the fuel pipe 9, combustion in the pot 2 continues to progress and is stored. Fuel is reduced. Then, when the fuel pump 4 starts to operate again by the signal of the timer 7, the fuel in the pot 2 almost disappears and the temperature of the bottom surface of the pot 2 rises, so that almost all the fuel that has begun to be supplied can be immediately vaporized. Therefore, the pot 2 can be shifted to the steady combustion in a short time.

In addition, if the set time of the timer 7 is set by the experiment so that the fuel remaining in the pot 2 is almost exhausted, the inside of the pot 2 which is generated in the conventional pot type oil combustor is about to become the steady combustion. It is possible to prevent the trouble that the fuel stored in the tank is vaporized at one time to cause abnormal combustion, and the problem that the shape of the pot 2 has to be set larger in consideration of the abnormal combustion is solved.

Further, in this invention, when the flame detector 6 detects the absence of flame while the fuel pump 4 is stopped by the timer 7, the time set by the timer 7 is forcibly ended and the fuel pump 4 is stopped.
Since the fuel is activated by supplying the fuel, the combustion flame becomes large immediately even if the combustion flame becomes small for a moment, and there is no trouble of abnormal digestion, and stable operation can be expected.

[Explanation of device]

As described above, in this invention, the fuel pump 4 and the timer 7 are interlocked, and the timer 7 is an ignition device that stops the fuel pump 4 for a set time by the signal of the flame detector 6. There is no fear that a large amount of fuel will be stored in the pot 2, and the size of the pot 2 has become sufficiently practical even if it has a small shape corresponding to the steady combustion amount.

Further, since there is no possibility of fuel being stored in the pot 2, it becomes possible to ignite with a small flame when a small amount of fuel is sent to the pot 2, and it is possible to use a small igniter 5 having a small heat capacity for ignition. The electric energy supplied to the container 5 is small.

In the case of controlling the timing of energizing the blower 3, the fuel pump 4, and the igniter 5 with a timer, a dedicated control timer 7 can be used instead of the dedicated timer 7 of the fuel pump 4. When a one-chip microcomputer is used as a timer for a computer, install the timer 7 of the ignition device of the present invention as a program for the microcomputer,
The timer 7 may be operated by the microcomputer.

[Brief description of drawings]

FIG. 1 is a sectional view of an oil combustor according to the present invention, and FIG. 2 is a circuit diagram showing the relationship of the functional blocks of the present invention. 1 ... wind passage, 2 ... pot, 3 ... blower, 4 ... fuel pump, 5 ... igniter, 6 ... flame detector, 7 ... timer

Claims (2)

[Scope of utility model registration request] 1. A pot 2 installed in an air passage 1 to which combustion air is supplied, a blower 3 for supplying air to the air passage 1, a fuel pump 4 for supplying fuel to the pot 2, and a pot 2. In a pot type oil combustor having an attached igniter 5 and a flame detector 6 above the pot 2, the fuel pump 4 is provided with a timer 7 which stops the operation for a certain period of time. An ignition device for a pot type oil combustor, characterized in that the flame detection signal is connected to a timer 7 and the operation of the fuel pump 4 is stopped for a certain period of time when a flame is detected during ignition. 2. A timer 7 for connecting the output signal of the flame detector 6.
The ignition device for a pot type oil combustor according to claim 1, wherein the fuel pump 4 is operated by the flame non-detection signal even within the set time.