JPH04155106A - Burner - Google Patents

Abstract

PURPOSE:To form a uniform flame and carry out stable combustion and reduce combustion noises by providing a throttling section which communicates with the inside of a flame port unit and the inside of a vaporization body and covering the throat section of the throttling section and providing a mixing plate which has a plurality of holes on the upper face. CONSTITUTION:Vaporized kerosene is mixed in the vaporization body l and the throat section of a throttling section 3 by a mixing plate 9 positioned downstream of the throttling section 3, and in the spaces in the inner cylinder 4 and a cap 7 to become a combustible mixture gas, and blown out from the side face section of a flame port unit 8 through a flame port 5 and metal net 6. The mixture gas is ignited by an ignitor and forms a primary combustion flame 14 and secondary combustion flame 15. Since in the formation of a combustible mixture gas the diffusion of the vaporized kerosene is further promoted by the throat section 3 provided at the throttling section 3, the combustible mixture gas is mixed with the combustion gas sufficiently, and, furthermore, the vaporized kerosene and combustion air can be mixed well by a mixing plate 9 positioned downstream of the throat section. With this arrangement a uniform, stable primary combustion flame 14 can be formed all over the circumference of the flame port unit 8, and the quantity of combustion is especially increased, and even in the case of increasing the volume of the vaporized kerosene stable combustion is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a combustion device that sends vaporized fuel to a flame hole unit for combustion.

[Conventional technology]

FIG. 2 is a sectional view showing, for example, a conventional combustion device,
In the figure, numeral 1 is a cylindrical vaporizer with a bottom that vaporizes kerosene, which is a liquid fuel, and an electric heater 2 is built into the side surface. At the top of this vaporizer 1, there is a cylindrical constriction part 3 that guides the vaporized kerosene upward, a mixing plate 9 that has a plurality of holes 16 on the bottom and mixes the vaporized kerosene and air, and a plurality of flame holes 5. The cap 7 located on the top of the inner cylinder 4 and the inner cylinder 114 has a wire mesh 6 tightly wound on the outer circumferential surface and has a wire mesh 6 on the outer circumferential surface.
E! Among these [4, wire mesh 6. A flame hole unit 8 is constructed by fixing the cap with a special screw 13 embedded and fixed near the constriction part 3. In addition, 10 is an annular flame-holding ring provided around the flame hole unit, and is placed on the upper side surface of the vaporizer 1.

11 has one end connected to the lower side surface of the vaporizer 1, and
A blow pipe 12 is provided coaxially within the blow pipe 11 to feed combustion air into the air for combustion, and is an oil feed pipe that feeds kerosene into the vaporized body 1. Reference numeral 15 indicates a secondary combustion flame generated by mixing the primary combustion flame 14 and outside air.

Next, we will state the operation.

First, the electric heater 2 is energized to preheat the vaporizer 1 to a temperature (approximately 250° C. to 300° C.) necessary for vaporizing kerosene. After the preheating is completed, combustion air and kerosene are supplied into the vaporized body 1 through the blast pipe 11 and the oil pipe 12. Then, the kerosene is heated and vaporized, and rises inside the throttle section 3 while mixing with the combustion air.

Then, by passing through the holes 16 of the mixing plate 9, it mixes with air, and the flame holes 5. The flame 1 is ejected from the side surface of the unit 8 through the wire mesh 6. Then, the mixture blown out is ignited by an ignition means (not shown) such as a discharge spark,
Multiple primary combustion flames 14 are generated. Then, a secondary combustion flame 15 is formed by mixing this primary combustion flame 14 and the outside, and the starvation reaction is completed.

[Invention tries to solve it! ! j1) The conventional combustion device is constructed as described above, and this mixture of 4 tons of kerosene and combustion air is carried out inside the vaporizer 1.

Aperture part 3. s! Plywood9. The inner cylinder 4 and the cap 7 are mixed inside this space, but the mixing is not sufficient, and especially when the combustion amount is increased, the amount of scorched kerosene is large (and the combustion air is mixed with this mixture). is insufficient, and flame hole 5
The primary combustion flame from 14 forces 1 is not formed uniformly around the entire circumference,
Differences in the size of the flame may occur, or the degree of mixing of vaporized kerosene and air may be inappropriate. , the air-fuel mixture LtmL, and the formation of a turbulent region, which caused large noise and increased combustion noise.)

This invention was made to solve the above-mentioned problems.It forms a flame uniformly, allows stable combustion, and reduces combustion noise. The purpose is to obtain equipment.

[Means to solve the problem]

The combustion device according to the present invention includes a vaporizer that vaporizes liquid fuel, a flame unit provided above the vaporizer, a throat portion protruding into the interior of the flame unit, and the flame port unit. and a mixing plate having a plurality of holes in an upper surface provided so as to cover the throat part of the throttle part.

[Effect]

The combustion device according to the present invention sufficiently mixes vaporized liquid fuel and combustion air using the throat section provided in the constriction section and its mixing plate to uniformly form a stable flame.
It also alleviates the turbulent area of the air-fuel mixture and achieves smooth mixing.
Reduces combustion noise.

〔Example〕

Hereinafter, in FIG. 1 for explaining one embodiment of the present invention with reference to the drawings, 1, 2, 4 to 8, 10 to 16 are the same as the conventional example,
Or the explanation is omitted because it is a considerable part. 3 is the aperture part,
A throat portion that protrudes into the flame hole unit 8 and the vaporizer 1 is provided at the center, and is fitted and fixed to the upper part of the vaporizer 1. A mixing plate 9 is provided inside the inner cylinder 4 and has a plurality of holes 16 in its upper part, and covers the throat portion on the flame hole unit 8 side.

Next, the operation will be explained.

The steps from electric heating and energization to the heater 2 to vaporization of kerosene in the vaporizer 1 are the same as those in the conventional example, and therefore the description thereof will be omitted. Then, the vaporized kerosene is inside the vaporizer 1.

and a mixing plate 9 located in the throat section of the throttle section 3 and downstream of the throttle section 3. Then, it is mixed in the space inside the inner cylinder 4 and the cap 7 to become flammable waste gas, which is then rectified into the flame hole 5.
It passes through the wire mesh 6 and is ejected from the side of the flame port unit 8.

This ejected air-fuel mixture is ignited by the ignition means to form a primary combustion flame 14 and a secondary combustion flame 15, and is propelled before the combustion reaction is completed, so that it is sufficiently mixed with the combustion air, and then The mixing plate 9 located in the flow allows sufficient mixing of the vaporized kerosene and the combustion air.

Therefore, it is possible to form a uniformly stable primary combustion flame 14 over the entire circumference of the flame hole unit 8, and in particular, to increase the amount of combustion,
Even if the amount of vaporized kerosene is increased, stable combustion will occur.

Furthermore, the turbulent region that occurs during the formation of the air-fuel mixture is alleviated by the air-fuel mixture flowing in an excessively variable manner through the throat section of the throttle section 3, thereby reducing combustion noise. For example, combustion amount'=, 5
000 Kcal/h, the combustion noise can be reduced by about 2 to 3 dB compared to the conventional example.

〔Effect of the invention〕

As described above, according to the present invention, the throat part of the throttle part is provided inside the flame hole unit, and the mixing plate having a plurality of holes on the upper surface is installed so as to cover the throat part. This mixture of fuel and combustion air is sufficiently uniform, and the flame that forms around the entire circumference of the flame port unit is uniform, resulting in stable combustion regardless of the amount of combustion, resulting in highly reliable combustion. This has the effect of providing a device.

In addition, the throat portion alleviates the severe turbulence that occurs when air-fuel mixture is generated, resulting in a quiet combustion sound and a comfortable combustion device with reduced combustion noise.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a combustion device according to an embodiment of the present invention, and FIG. 2 is a W side view showing a conventional combustion device. In the figure, 1 (the vaporized body, 3 the constriction part, 4 the inner tube, 5
7 is the flame hole, 7 is the cap, 8 is the flame hole unit, 9 is the mixing plate, 10 is the flame holding ring, 14 is the primary combustion flame, 15 is 2
The secondary combustion flame, 16, is a hole. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent: Masuo Oiwa (2 others) No. 1 91 Plywood Diagram 2

Claims (1)

[Claims] It has a vaporizer that vaporizes liquid fuel, a flame hole unit provided on the upper part of the vaporizer, and a throat portion protruding into the inside of the flame hole unit, the inside of the flame hole unit and the inside of the vaporizer. A combustion device comprising: a constriction section that communicates with the throttle section; and a mixing plate having a plurality of holes on an upper surface provided so as to cover the throat section of the constriction section.