JPS6396408A - Gun-type burner - Google Patents

Abstract

PURPOSE:To shorten a flame without destroying ignitability by installing an air jet hole in front of a stabilizer to accelerate the blending of fuel and air. CONSTITUTION:Combustion air from an air blasting fan 16 flows into a combustion chamber 13 through an air jet hole 6 and the remaining air is supplied into the chamber 13 through the part between an inner cylinder 9 and an outer cylinder 10 via an air hole 12 on a blocking plate 11 and through the cylinder 9 and a stabilizer 2. Atomized fuel from a nozzle 1 is sent to the chamber 13 with the combustion air in the cylinder 9 coaxially, and ignited with an ignition electrode 14 to form a fire flame with the air from a secondary air hole 4 and the hole 6 after the flame is held by the rotating blade 3 of the stabilizer 2. As the hole 6 exist in front of the stabilizer 2, the blending of atomized fuel and surrounding air is effected finely to shorten the flame. Air quantity and velocity can be adjusted by the hole 12 on the plate 11 and even when the air velocity is accelerated, the flow around the electrode 14 is not accelerated and ignitability is not deteriorated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gun-type burner installed in a small household petroleum water heater or the like.

2. Description of the Related Art A conventional gun type burner has a nozzle 2 in an outer cylinder 1 as shown in FIG. 5 and an ignition electrode rod 6. (For example, Japanese Unexamined Patent Publication No. 57-74511) Problems to be Solved by the Invention In general, in gun-type burners, the length of the flame formed in the burner is important when installed in a small oil water heater, etc. , If the length of the flame is too long, the surrounding structures will be cooled by the flames, resulting in soot.

This causes Co to be generated.

In the conventional configuration, fuel sprayed from the nozzle 2 and combustion air are coaxially supplied inside the outer cylinder 1, ignited by the ignition electrode 6, and a flame is formed by the stabilizer 3. The length of the flame is mainly controlled by the mixing of the spray with the surrounding air, and in order to shorten the length of the flame,
It is necessary to increase the flow rate of the combustion air passing through the outer cylinder 1 to improve the mixing of the spray and air, but at this time the flow rate around the ignition electrode rod 6 also decreases, so that the flow rate around the electrode rod 6 is reduced. There have been problems such as poor ignitability when the spray is ignited by an electric spark and a loud ignition sound when ignited.

The present invention aims to solve these conventional problems, and aims to shorten the length of the flame of a gun-type burner and improve ignitability.

Means to Solve the Problems In order to solve the above problems, the gun type burner of the present invention includes a nozzle, a swirl vane having an opening in the center in front of the nozzle, and a stabilizer equipped with a secondary air hole on the outer periphery of the swirl vane. In front of the stabilizer, there is an inner shell having a large number of air ejection holes on the wall surface, and an outer shell that forms an air passage outside the inner shell, and behind the stabilizer there are swirl vanes in the center of the stabilizer and two on the outer periphery. The inner cylinder and the outer cylinder are provided so as to define an air hole, and the air hole is provided and closed at the other ends of the inner cylinder and the outer cylinder.

Effect of the present invention With the above-described configuration, the air is jetted out from the air jet hole on the wall surface of the inner cylinder to improve the mixing of the spray and the surrounding air, and the air holes are provided at the other ends of the inner cylinder and the outer cylinder behind the stabilizer. By providing this and closing it, the velocity of the flow around the ignition electrode can be adjusted and the ignition performance can be improved.

Example Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, 1 is a nozzle that sprays liquid fuel, 2 is a swirling vane that has an opening in the center in front of the nozzle 1, and 3
is a stabilizer equipped with secondary air holes 4 around the periphery; 6 is an inner shell having a large number of air jet holes 6 on the wall in front of the stabilizer 2; 7 is an outer shell forming an air passage 8 on the outside of the inner shell 6;
Reference numerals 9 and 1o denote an inner cylinder and an outer cylinder provided at the rear of the stabilizer 2 so as to partition the swirling blade 3 and a secondary air hole 4, and 11 an inner cylinder 9 and an outer cylinder 10 with an air hole 12 provided at the other end. It is a closed blocking plate. Reference numeral 13 designates a combustion chamber in which combustion occurs, 14 an ignition electrode rod provided near the nozzle 1, 16 a blower motor for sending combustion air, and 16 a blower fan.

In the above configuration, combustion air is sent from the blower motor 16 and the blower 71, part of which passes through the air passage 8 and is supplied to the combustion chamber 13 from the air outlet 6, and the rest is sent to the combustion chamber 13 through the air blower 16.
The air passes through the air hole 12 provided in 1, passes between the inner cylinder 9 and the outer cylinder 1o, and inside the inner cylinder 9, passes through the stabilizer 2, and is supplied to the combustion chamber 13.

The fuel sprayed from the nozzle 1 is sent into the combustion chamber 13 coaxially with the combustion air flowing in the inner cylinder 9, is ignited by the ignition electrode 14, and is stabilized by the swirling blade 3 of the stabilizer 2, while maintaining a stable flame. , a flame is formed in the combustion chamber 13 by air from the secondary air holes 4 and the air jet holes 6.

In order to shorten the length of the flame, it is necessary to promote the mixing of the spray and the surrounding air, but since the air jet holes 6 are provided in front of the stabilizer 2, the mixing of the spray and the surrounding air is further promoted compared to the conventional method. , In order to improve the mixing and combustion characteristics, the air jet holes 6 and the secondary air holes 4 are
It is necessary to adjust the amount and flow rate of combustion air supplied from the swirling vanes 3, but in this configuration, the amount of air flowing to each of the air holes 12 provided in the blocking plate 11 is adjusted.

Flow rate can be adjusted. Therefore, in order to improve the mixing of the spray and the surrounding air, even if the air flow speed from the air jet holes 6 and the secondary air holes 4 is increased, the flow speed around the ignition electrode rod 14 should not be increased. ignitability will not deteriorate.

Effects of the Invention As described above, according to the gun type burner of the present invention, since the air jet hole is provided in front of the stabilizer, it is possible to promote the mixing of the spray and the surrounding air, and the air hole provided in the blocking plate allows the air to be It is possible to adjust the amount and flow rate of air flowing from the nozzle hole, secondary air hole, and swirl vane.The flow rate and flow speed of air from the air nozzle hole and secondary air hole can be adjusted to mix the spray and the surrounding air. Even if the flame is accelerated and the length of the flame is shortened, the flow velocity around the ignition electrode can be prevented from increasing, so the effect of shortening the length of the flame can be obtained without deteriorating the ignitability. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a gun type burner in an embodiment of the present invention. FIG. 2 is a sectional view of a conventional gun type burner. 1...Nozzle, 2...Stabilizer,
3...Swirling vane, 4...Secondary air hole,
6... Inner shell, 6... Air outlet, 7.
...Outer body, 8...Air passage, 9...
...Inner cylinder, 1o...Outer cylinder, 11...Blocking plate, 12...Air hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (2)

[Claims] (1) A nozzle that sprays liquid fuel, a swirling vane provided in front of the nozzle having an opening in the center, a stabilizer equipped with a secondary air hole on the outer periphery of the swirling vane, and a wall surface in front of the stabilizer. an inner shell having a large number of air ejection holes;
an outer shell forming an air passage outside the inner shell; an inner barrel and an outer barrel are provided behind the stabilizer so as to partition a swirling blade in the center of the stabilizer and a secondary air hole on the outer periphery;
A gun type burner in which the other ends of the inner cylinder and the outer cylinder are closed with air holes provided. (2) The gun type burner according to claim 1, wherein the air holes provided at the other ends of the inner cylinder and the outer cylinder have a larger area between the inner cylinder and the outer cylinder than inside the inner cylinder.