JPH0722579Y2 - Combustor - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a combustor of vaporized fuel.

[Prior Art and Its Problems] As shown in FIGS. 4 and 5, a conventional household propane stove is a donut-shaped combustion part a in which primary air is mixed with propane vaporized and mixed with propane. Gas is injected from the gas injection pipe b in the direction of arrow c, and the nozzles d, e, f
It gushes out more and burns to form a flame.

Further, as shown in FIG. 6, the Johnson burner ejects vaporized gas from a nozzle g as shown by an arrow h, and the primary air flow attracted to the ejection enters as shown by an arrow i, and in the mixing chamber j, The vaporized gas and air are mixed and ejected from the tip opening portion of the nozzle k and burned to form a flame.

However, it is difficult to evenly adjust the mixing ratio of vaporized gas and air, and most of the flame formed by combustion is completely burned and becomes blue, but part of the flame is incompletely burned,
It becomes red or yellow, and in particular, it has the drawback that soot is formed on the bottom surface of a pot etc. set on the combustion part a of a household propane stove, and when incomplete combustion occurs,
There is a drawback in that the amount of heat generated is significantly reduced, which causes energy loss. For this reason, from the past
There is something like No. 1 that supplies secondary air into the flame, but this kind of conventional one supplies secondary air as it is in the state where it is desired to cool it at the outside temperature, so it is completely In some cases, it could not be burned.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a combustor capable of complete combustion.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention, in a combustor in which primary air is mixed with vaporized fuel to cause combustion, penetrates a base of a flame forming portion of the combustor. A secondary air supply pipe is provided in the combustor, the secondary air supply pipe being opened in substantially the central portion of the flame forming portion and supplying the secondary air to the flame forming portion from the opening portion, and the tip portion of the secondary air supply pipe is provided. The main point is that it is formed so as to project outward from the base of the flame forming portion.

[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIGS. 1 and 2 show the application of the present invention to a household propane stove. FIG. 1 is a longitudinal sectional view taken along the central portion, and FIG. 2 is a sectional view taken along the line AA of FIG. Show. Reference numeral 1 denotes a combustor body made of cast iron or the like, which is formed in a hollow annular shape. A circular hole 1a for joining a plurality of secondary air supply pipes 2 is provided on the bottom surface of the combustor body 1, and a combustor body 1 is provided on the upper surface. A round hole 1b having a diameter larger than that of the secondary air supply pipe 2 is provided, the outer edge of the lower end of the secondary secondary air supply pipe 2 is joined to the round hole 1a, and it stands upright with the center of the round hole 1b as a peripheral edge. A circular opening 1c is formed by the secondary air supply pipe 2 and the round hole 1b penetrating with a gap, and the tip 2a of the secondary air supply pipe 2 is a flame forming part. It projects above the base portion 1d and projects to almost the center of the flame 3 formed during combustion.

Further, the mixed gas introduction pipe 4 is extended substantially horizontally from the cylindrical outer surface of the annular combustor body 1, and the outer end portion of the mixed gas introduction pipe 4 is expanded so that air and gas are separated from each other. The mixing chamber 5 is formed, and a fan-shaped partition plate 6 is attached to the end of the mixing chamber 5, and the inner peripheral surface of the partition plate 6 is joined to the outer peripheral portion of the gas burner 7 at substantially the tip thereof.

The gas burner 7 has a circular tube whose tip is formed in a convex conical shape, and a jet port 7a for the vaporized gas of propane is formed at the tip thereof.

Next, the operation of this propane stove will be described.

The vaporized gas of propane is introduced into the gas burner 7, the vaporized gas is ejected from the vaporized gas jet port 7a at a high speed as shown by an arrow B, and the air is jetted into the mixing chamber 5 as shown by an arrow C,
From the fan-shaped opening 6a between the partition plates 6, 6, the jetted gas is attracted and enters the jetted gas, and is mixed with the vaporized gas in the mixing chamber 5, and the mixed gas is passed through the mixed gas introduction pipe 4 to form an annular combustor. After the main body 1 is filled, it is jetted from the opening 1c on the outer periphery of the secondary air supply pipe 2 and the opening of this mixed gas
Attracted by the jet flow from 1c, an upflow of secondary air occurs in the secondary air supply pipe 2, and this secondary air efficiently mixes from the inside of the burning flame 3 into the entire flame 3. With
Since the tip 2a of the secondary air supply pipe 2 is heated by the flame 3, the secondary air passing through this secondary air supply pipe 2 is
Is sufficiently heated when passing through the pipe 2, and is ejected from the tip of the tube 2 into the flame 3, so that the sufficiently heated secondary air is supplied into the flame 3, and the supply is smoothly performed. It can burn completely and improve thermal efficiency.

Therefore, the flame 3 is incompletely burned and becomes blue without becoming red or yellow, which prevents the formation of soot on the bottom surface of the pot or the like set on the flame 3 and significantly increases the amount of heat generation. For example, the temperature of the flame 3 becomes about 1700 ° C., and the energy efficiency can be increased.

Next, a second embodiment will be described with reference to FIG.

In this embodiment, the invention is applied to a Johnson burner. Reference numeral 8 is a mixed gas introducing pipe corresponding to the mixed gas introducing pipe 4 of the first embodiment, and the left end of the mixed gas introducing pipe is expanded to form a mixing chamber 9
Is formed, and the burner 10 for the vaporized gas is disposed close to the left side of the mixing chamber 9 and is directed toward the center line thereof.
Reference numeral 10a is a vaporized gas ejection port of the vaporized gas burner 10.
Further, a secondary air supply pipe 11 is disposed substantially in parallel with the center line of the mixed gas introduction pipe 8 and the mixing chamber 9, and the inlet of the supply pipe 11 is close to the tip of the gas burner 10. The tip of the secondary air supply pipe 11 projects outward from the tip of the mixed gas introduction pipe 8 and is opened at approximately the center of the flame 12 formed on the tip side of the pipe 8. The mixed gas is ejected from the vaporized gas ejection port 10a in the direction of the arrow D, and the air flow attracted by the ejected flow of the vaporized gas is generated as shown by the arrow E to generate air and vaporized gas in the mixing chamber 9. After mixing, this mixed gas is jetted from the tip of the mixed gas through the mixed gas introducing pipe 8.

The secondary air attracted to the jet flow of the mixed gas is supplied to the inside of the flame 12 through the secondary air supply pipe 11, efficiently mixes from the inside of the flame 12 to the entire flame 12, and the secondary air is supplied. Since the tip of the tube 11 is heated by the flame 12, this tube 11
Sufficiently heated secondary air is supplied into the flame 12 from the tip of the to cause complete combustion and increase energy efficiency.

The present invention is not limited to the above, and can be applied to a burner of a blowout machine, a heavy oil burner, and the like.

[Effect of the Invention] As described in detail above, the present invention, in a combustor in which primary air is mixed with vaporized fuel to cause combustion, penetrates the base of the flame forming portion of the combustor, A secondary air supply pipe is provided in the combustor, which opens at approximately the center of the flame forming portion and supplies secondary air to the flame forming portion through the opening, and the tip of the secondary air supply pipe is provided. It is formed by projecting outward from the base of the flame forming portion.
Therefore, since the tip portion of the secondary air supply pipe is heated by the flame, the secondary air passing through this secondary air supply pipe is sufficiently heated when passing through this pipe, and the inside of the flame enters from the tip of this pipe. Since the secondary air that is sufficiently jetted is supplied to the flame, and the secondary air is supplied smoothly, the complete combustion is achieved and the thermal efficiency can be improved.

[Brief description of drawings]

1 is a longitudinal sectional view of a propane stove showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a second embodiment in which the present invention is applied to a Johnson burner. FIG. 4 is a side view of a conventional propane stove, FIG.
FIG. 6 is a plan view of the combustion section, and FIG. 6 is a side view of a conventional Johnson burner. 2, 11 …… Secondary air supply pipe, 3, 12 …… Flame (flame forming part).

Claims (1)

[Scope of utility model registration request] 1. In a combustor in which primary air is mixed with vaporized fuel to cause combustion, the base of the flame forming portion of the combustor is penetrated and an opening is formed in substantially the center of the flame forming portion. , A secondary air supply pipe for supplying secondary air to the flame forming portion from the opening is provided in the combustor, and a tip of the secondary air supply pipe is projected outward from the base of the flame forming portion. A combustor characterized by being formed by