JPS6364686B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device having an outer wick tube located outside the wick and on which a combustion tube is mounted.

In a conventional liquid fuel combustion device of this type, air holes B and C are provided in the side wall of the core outer cylinder A as shown in Fig. 3, but the distance between each air hole B and C is large. , when the liquid fuel combustion device is in stable combustion,
Flame is not held in air holes B and C. but,
In this type of liquid fuel combustion device, when denatured kerosene or fuel containing high boiling point components is used, and when tar-like substances accumulate in the wick and the combustion rate decreases, the air holes B and C are inherently stable. Because they do not have a flame-holding ability, the flame is held unevenly, causing local standing flames or yellow flames due to partial overheating of the wick, shortening its lifespan.

A dwindling flame is likely to be formed in the air holes B and C, causing a flickering sound of the flame and variations in the amount of combustion.

In particular, in a liquid fuel combustion device having a red-hot cylinder or a transparent outer cylinder, if a flame is held unevenly in the air holes B and C, unevenness tends to occur in the red-hot cylinder.

It had the following drawback.

The present invention prevents flickering of the flame by stably holding the flame in the core outer cylinder.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 1 is a combustion tube, and 2 is a cylindrical outer tube provided with a cylindrical transmission tube 3 made of heat-resistant glass or the like on its upper part. 4 is a cylindrical glowing cylinder made of wire mesh etc.
A cylindrical outer flame tube 5 having a plurality of air holes 5a is provided at its lower part, and its upper part is joined to the upper part of the transmission tube 3 via a ring 6. Red-hot tube 4, outer flame tube 5
A cylindrical inner flame tube 7 having a plurality of air holes 7a is provided inside, and a combustion chamber 8 is formed between the outer flame tube 5 and the inner flame tube 7. The inner flame tube 7 is provided with a disk-shaped top plate 9 having a plurality of ventilation holes 9a,
A disk-shaped flame expansion plate 10 is provided on the top of the top plate 9. In addition, a plurality of ventilation holes 1 are provided in the inner flame cylinder 7.
A disk-shaped partition plate 11 having a diameter 1a is provided. The inner flame tube 7 is supported above the cylindrical core guide tube 12, and the outer flame tube 5 is supported above the cylindrical core outer tube 13. As shown in FIG. 2, the wick outer cylinder 13 is provided with a plurality of air holes 13a arranged in a dense array facing the upper part of the lamp wick 14, and the air holes 13 arranged in a dense arrangement are provided in the outer wick tube 13.
A plurality of sparsely arranged air holes 13b, which are smaller in number than the densely arranged air holes 13a, are provided below the lamp wick 14 in the same way. All of the air holes 13b are densely arranged air holes 13a.
It is provided so as to overlap with a part of the same vertical line in the vertical direction. In addition, 15 is a cylindrical fire core, 1
6 is a cylindrical core presser metal fitting.

In the above configuration, when the fire wick 15 of the liquid fuel combustion device is ignited and the main wick 14 is ignited, a stable flame is held in the densely arranged air holes 13a, and the combustion amount gradually increases. However, even if the combustion amount reaches a normal level, a stable flame is maintained due to the mutual flame holding power of the flame held by the densely arranged air holes 13a. In addition, due to the sparsely arranged air holes 13b,
Air is supplemented in advance to create a good combustible mixture, and since the densely arranged air holes 13a and the sparsely arranged air holes 13b are provided on the same vertical line in the vertical direction, a stable upward air flow is generated. However, a more stable flame could be held by the dense air holes 13a.

As is clear from the above description, the liquid fuel combustion apparatus of the present invention provides the following effects.

Since a stable flame is held in the wick outer tube from the time of startup, it is possible to prevent yellowing and standing flames due to local overheating of the wick, which tends to hold a sparse and uneven flame in the wick outer tube when the combustion rate decreases. .

An uneven flame in the core outer tube causes the flame held in the air hole of the upper combustion tube to become uneven and decrease. It can be stabilized.

When the combustion rate decreases, flashing flames are often formed in the core and outer cylinders, but by holding the flame in the core and outer cylinders from the beginning, it is possible to prevent fluctuations in the combustion rate due to flickering noises and flame instability. .

By providing an air hole below the stable flame holding as in the example, air can be supplied in advance.
A more stable flame is formed. In other words, when the flame is held in the air hole, it becomes ventilation resistance.
Since a good air supply is not carried out, flame holding becomes unstable, but by providing air holes in the lower part where the flame does not hold, a stable air supply can be obtained.

By providing an air hole below the stable flame holding as in the example, it is possible to prevent the high temperature caused by the stable flame holding from being transferred to the lower part of the wick outer cylinder, thereby suppressing the accumulation of tar-like substances on the wick. At the same time, the amount of vaporized gas generated from the wick can be reduced.

When the air holes for stable flame holding and the lower air holes are provided in the same vertical line as in the example, the air flows from the upper and lower air holes are efficiently diffused and mixed, resulting in good combustion and flame holding. The condition becomes stable.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view of a main part showing an embodiment of a liquid fuel combustion device of the present invention, FIG. 2 is an enlarged front view of a main part of the liquid fuel combustion device, and FIG. 3 is a front view of a main part of a conventional example. It is. 4... Red-hot tube, 5... Outer flame tube, 7... Inner flame tube,
13... core outer cylinder, 13a... dense array of air holes, 14... lamp wick.

Claims (1)

[Scope of Claims] 1. A lamp wick that vaporizes liquid fuel, a wick outer cylinder located outside the lamp wick, and having a combustion cylinder placed on top thereof;
A plurality of air holes are provided in the upper part of the wick outer cylinder to face the lamp wick, and a plurality of air holes in a dense array are provided with some of the air holes facing the upper part of the lamp wick. and a plurality of sparsely arrayed air holes, the other air holes being arranged below the densely arrayed air holes. 2. The liquid fuel combustion device according to claim 1, wherein a part of the densely arranged air holes and a part of the sparsely arranged air holes are provided on the same vertical line in the vertical direction.