JPS5937552Y2 - combustion device - Google Patents

Description

[Detailed description of the invention] This invention relates to improving the mounting position of the spark plug in a combustion device that swirls secondary air for combustion.The purpose of this invention is to obtain a wide ignition range. be.

Hereinafter, one embodiment of this invention will be explained according to the drawings. In the drawing, 1 is a combustion frame, an outer cylinder 2 and an inner cylinder 3 are formed coaxially, and there is a gap between the outer cylinder 2 and the inner cylinder 3. A partition wall 4 is provided.

Reference numeral 5 denotes an electric heater cast into the outer cylinder 2. The electric heater heats the outer cylinder 2 to form a vaporizing surface 6.

Reference numeral 1 denotes a mixing chamber formed by a partition plate 8, and a flame port plate 9 provided with a mixed gas outlet is provided at the top of this mixing chamber.

10 is a mixed gas swirling plate provided to swirl the mixed gas ejected from the flame port plate 9; 11 is a secondary air supply passage formed inside the inner cylinder 3; A secondary air swirling plate provided to swirl secondary air in the passage, 13 a fuel supply section that supplies liquid fuel to the vaporization surface 6 through a combustion pipe 14, and 15 a space between the combustion frame 1 and An air guide plate 17Vi is a combustion pipe connected to the combustion frame, and a secondary air hole 18 is provided between the air guide plate 17Vi and the combustion frame.

Reference numeral 19 denotes an ignition plug provided in this combustion tube, and the discharge electrode 20 of this ignition plug is outside the swirling area of the air swirled by the secondary air swirling plate 12, and the ignition plug 2 ejects from the secondary air hole 18. It is provided close to the flame outlet plate 9 so as not to be affected by air.

21 is an ignition transformer connected to the ignition plug of a cigarette; 22 is a blower; part of the air blown by the blower is supplied as primary air from a primary air supply pipe 23; the rest is supplied as a secondary air supply. It is supplied as secondary air from the pipe 24.

In the combustion apparatus configured as described above, fuel is supplied from the fuel supply section 13 to the vaporization surface 6 through the fuel pipe 14.

At this time, even though the vaporization surface 6 is heated to a high temperature by the electric heater 5, the fuel is vaporized.

On the other hand, combustion air is supplied by a blower 22 in a manner that it is divided into primary air and secondary air.

The primary air is mixed with the vaporized fuel in the mixing chamber 7 and ejected from the mixed gas outlet of the flame port plate 9.

Secondary air is supplied from the secondary air supply passage 11 to the secondary air swirl plate 1
2, and is supplied while being rotated by the secondary air hole 18.
Supplied from.

The mixed gas and secondary air are supplied in this way, and a primary flame is formed by discharging at the discharge electrode 20 of the ignition plug 19, and the secondary air is supplied to this primary flame to perform stable combustion. It will be done.

Here, since the mounting position of the discharge electrode 20 is provided outside the swirling area of the secondary air, the mixed gas ejected from the mixed gas outlet provided on the burner port plate 9 is caused by the secondary air, especially the swirling flow. Since there is no diffusion, the ignition range is widened.

This ignition range refers to the area in which ignition is possible, and ignition is possible only when the amount of fuel is greater than a certain ratio of the amount of fuel and air, and when the amount of air is greater than that, ignition is impossible.

In the above-mentioned embodiment, the discharge electrode is provided at a position where the amount of shunted air is small to prevent it from being diffused by the swirling flow, thereby making it easier to ignite.

In the above embodiment, the button is explained using liquid fuel, but it is not limited to this, and the same effect can be obtained even when using gaseous fuel.

As explained above, this invention has the effect of providing a wide ignition range by providing the ignition plug so as to discharge outside the swirling area of the secondary air.

[Brief explanation of the drawing]

The figure is a sectional view showing one embodiment of this invention, and 1 (
f'i combustion flame, 7 (/'i mixing chamber, 9 is the flame port plate,
11 is a secondary air supply passage, 12 is a secondary air swirling plate, 19
is a spark plug.

Claims (2)

[Scope of utility model registration request] (1) A mixing chamber that mixes primary air and fuel, a flame port plate with a mixed gas spout at the top of the mixing chamber, and ignition of the gas ejected from the mixed gas spout of this flame port plate. A combustion flame ignited by the ignition plug and formed by the VC secondary air is swirled and supplied, wherein the ignition plug is placed outside the swirling area of the secondary air. A combustion device arranged to produce an electrical discharge. (2) The mixing chamber and the flame port plate are formed in an annular shape, a secondary air supply passage is provided in the center of the mixing chamber to supply secondary air, and a secondary air swirling plate is provided to swirl the secondary air. A combustion apparatus according to claim 1 of the utility model registration claim, characterized in that the combustion apparatus is provided with: