JPH0571844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a liquid fuel combustion apparatus equipped with two gun-type burners with different capacities.

<Prior art and its problems> Conventionally, in a liquid fuel combustion device equipped with two gun-type burners, when the two burners are started at the same time, both burners are ignited at the same time, and as a result, the ignition noise becomes louder. There was also the problem that a large amount of soot would come out at once when igniting.

Therefore, an object of the present invention is to provide a liquid fuel combustion device that does not cause loud ignition noise or emit a large amount of soot at once even when two burners are started operating at the same time.

<Means for Solving the Problems> In order to achieve the above object, the liquid fuel combustion device of the present invention has two gun-type burners with different capacities, and one electromagnetic pump controls the on-off valves of each of the burners. In a liquid fuel combustion apparatus that supplies liquid fuel through The present invention is characterized in that the burner on the high capacity side is ignited, and then, with a slight delay, the on-off valve on the small capacity side is opened, and the burner on the small capacity side is ignited.

<Operation> According to the feature of the present invention described above, even when simultaneous operation of two burners is selected, the two burners are ignited with a slight time difference, so the ignition sounds are not added, and a large ignition sound is generated. The occurrence of is suppressed. Further, the soot generated at the time of ignition is not a problem because the two soots are not temporarily added together.

It should be noted that an electromagnetic pump requires some time from startup until it reaches a steady state, and during that time the supply amount gradually increases from small to large. Therefore, if the burner is ignited during this period, it is easier to ignite and produces less noise and soot, a so-called "soft ignition effect."
works. Therefore, in the feature of the present invention described above, since a configuration is adopted in which the burner on the higher capacity side is ignited first, the above-mentioned soft ignition effect can be fully enjoyed. If the burner on the lower capacity side is ignited first, the soft ignition effect will not work on the burner on the higher capacity side that is ignited later, the ignition noise will be louder, and more soot will be generated.

<Example> FIG. 1 is an overall configuration diagram of an apparatus implementing the present invention.

A small-capacity gun-type burner 20 and a large-capacity gun-type burner 3 having a larger capacity are arranged vertically on the side wall 11 of the combustion chamber 10 in vertical positions.
0 is placed. A heat exchanger 12 for hot water supply can be provided in the combustion chamber 10 to form a hot water supply device.

Kerosene, which is a liquid fuel, is supplied by branching the kerosene sent from a tank (not shown) by one electromagnetic pump 40 into two passages, and passing the kerosene through an electromagnetic on-off valve 2, respectively.
1 and 31 respectively, the gun type nozzle 2
This is done by ejecting from 2 and 32. Further, each burner 20, 30 is provided with an igniter 23, 33, respectively, so that each burner can be ignited independently. 24, 34 are igniters of the respective igniters 23, 33.

Air is supplied to each burner 20, 30 by sending air into the burner case 60 by one blower fan 50.

Reference numeral 70 denotes a control unit, which controls the above-mentioned 2 operations based on an operation start/stop command signal from a user from an operation unit (not shown).
Two electromagnetic on-off valves 21, 31, two igniters 2
4, 34, the electromagnetic pump 40 and the ventilation fan 50 are controlled.

When the independent operation switch of the small capacity gun type burner 20 is turned on by the operation unit, the control unit 70 turns on the electromagnetic pump 40 and the ventilation fan 50, and also controls the electromagnetic opening/closing of the small capacity gun type burner 20 side. Turn on the valve 21 and igniter 24. As a result, the small capacity gun type burner 20 is ignited,
Burned alone.

Similarly, when the independent operation switch of the large-capacity gun-type burner 30 is turned on at the operation section, the control section 70 turns on the electromagnetic pump 40 and the ventilation fan 50, and also controls the electromagnetic opening/closing of the large-capacity gun-type burner 30 side. Turn on the valve 31 and igniter 34. As a result, the large capacity gun type burner 30 is ignited and burns independently.

Furthermore, when the user turns on the simultaneous operation switch of the large-capacity gun-type burner 20 at the operation section, the control section 70 turns on the electromagnetic pump 40 and the blower fan 50, and simultaneously turns on the large-capacity gun-type burner 30 side. Solenoid on-off valve 31 and igniter 3
Turn on 4. Then, after a delay of several seconds, the electromagnetic on-off valve 21 and igniter 24 on the small capacity gun type burner 20 side are turned on. As a result, the large-capacity gun-type burner 30 is ignited first, and the small-capacity gun-type burner 20 is ignited several seconds later.The delay of several seconds can be achieved by adding a delay circuit or the like to the control section 70.

The discharge amount of the electromagnetic pump 40 gradually increases from the start of operation, and it takes several seconds (for example, about 3 seconds) to reach a steady state. Therefore, during that time, the nozzle 22,
The fuel ejected from 32 also starts from a small amount and increases. Therefore, if the fuel is ignited during this period, the fuel injection force is small and the ignition is easy, and the so-called "soft ignition effect" is activated, which suppresses the generation of ignition noise and soot.

The soft ignition effect works not only when the burner is operated alone, but also when two burners are operated simultaneously. In that case, the soft ignition effect is more effective when the capacity of the burner is large. That is, when the burner capacity is large, the fuel injection force is also large, which tends to increase the ignition noise and the generation of soot at the time of ignition.

In the present invention, when two burners are started at the same time, the large capacity gun type burner 30 is ignited first, so that the soft ignition effect can be fully enjoyed. Although the soft ignition effect does not work on the small capacity gun type burner 20 that is ignited later, it is ignited smoothly because its capacity is small and the other burner is burning.

If two burners are started to operate simultaneously in the reverse order of the present invention, the soft ignition effect will not work on the large-capacity gun-type burner 30 that is ignited later, and the ignition noise will be loud and soot will be emitted. The quantity also increases.

<Effects> The present invention has the above configuration, and according to the liquid fuel combustion apparatus according to claim 1, when simultaneous operation of two burners is selected, the higher capacity burner is ignited first. Since the burner on the lower capacity side is ignited with a slight delay thereafter, the ignition sounds of both are not added, and the ignition noise can be suppressed. Similarly, soot does not occur all at once, causing no problems. Also, since the burner on the high capacity side is ignited slightly earlier, you can also enjoy the soft ignition effect of the electromagnetic pump.
The suppression of ignition noise and soot generation can be made even more effective.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an apparatus implementing the present invention. 10... Combustion chamber, 20... Small capacity gun type burner, 30... Large capacity gun type burner, 21,
31... Solenoid shut-off valve, 22, 32... Gun type nozzle, 23, 33... Igniter, 24, 34...
Igniter, 40...Electromagnetic pump, 50...Blower fan, 70...Control unit.

Claims (1)

[Claims] 1. A liquid fuel combustion device having two gun-type burners with different capacities, in which liquid fuel is supplied by one electromagnetic pump through the on-off valves of each of the burners, wherein the two burners are operated at the same time. When operation is selected, the on-off valve on the high-capacity side is first opened to ignite the burner on the high-capacity side at the same time as the electromagnetic pump is turned on, and then, after a slight delay, the on-off valve on the small-capacity side is opened. A liquid fuel combustion device characterized in that the device is configured such that a burner on a small capacity side is ignited when opened.