JPS5892706A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To decrease generation of stimulative odor and carbon monoxide at the rise time, by positioning the lower part of the outer casing for a wick closer to a main wick than the upper part, and by providing a plurality of breather pores, having a smaller diameter and more number than those in the upper part, to the lower part. CONSTITUTION:The outer casing 13 for a wick is provided opposed to a main wick 14, and the lower part of the outer casing 13 for a wick is positioned closer to the main wick 14 than the upper part. A plurality of breather pores 13a, having a smaller diameter and more number than a plurality of breather pores 13b provided to the upper part of the outer casing 13 for a wick, are provided to the lower part. With such an arrangement, generation of stimulative odor and carbon monoxide at the rise time can be decreased. In addition, rising flames, yellow flames, and the like, can be prevented at the time when combustion rate is lowered, as well as to prevent a red-heated cylinder from being red- heated unevenly, in the titled combustion apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device having a wick.

In a conventional liquid fuel combustion device of this kind, as shown in Fig. 3, a large number of air holes B and C are provided in the side wall of the outer wick cylinder A, and both air holes B and C facing the wick are connected to the wick. It was placed at the same distance from. Also, during steady combustion, air holes B and C
The diameter, arrangement, and number of air holes were specified so that the flame could not be held. In this case, the following problems occurred: (1) The lamp wick is ignited, and as the temperature rises, an upward airflow occurs inside the combustion cylinder, and air flows in from the air holes B and C, causing the fuel Q However, if the diameter and number of air holes B and C are determined and provided in order to obtain an air amount commensurate with the rated combustion amount during steady combustion, the amount of air flowing in at the time of startup will be too large, and a large amount of air will be generated. The gas rapidly rose, and the flame also cooled as it touched the low-temperature parts of the combustion tube, producing a large amount of stinging odor and monoacid (arsenic acid).

(2) During steady combustion, the flame is not held in the air holes B and C, but at the time of startup, irregular flames are held in the air holes B and C, which causes the flame in the red-hot cylinder at the top of the combustion cylinder to This had a negative effect on flame retention, and the red-hot cylinder was likely to have uneven red heat.

(3) When altered kerosene or fuel containing high boiling point components is used and tar-like substances accumulate in the wick and the combustion rate decreases, air holes B and C do not inherently have stable flame-holding ability. The irregular flame was held, causing phenomena such as standing flames and yellow flames in the combustion chamber due to local overheating of the wick.

The present invention eliminates the above-mentioned conventional drawbacks, and reduces the irritating odor and the generation of carbon monoxide and arsenic at the start-up of a liquid fuel combustion device, prevents the unevenness of red heat in the glowing tube, and prevents the generation of carbon dioxide when the combustion amount decreases. The purpose is to prevent standing flames and yellow flames.

In order to achieve the above object, the present invention has the lower part of the core outer cylinder closer to the master than the upper part, and a plurality of air holes are provided in this lower part with a smaller diameter and larger number than the air holes in the upper part. It is.

With this configuration, the air holes in the lower part of the outer cylinder can suppress the rapid inflow of air at the time of startup, and can gradually increase the amount of air as the temperature of the combustion cylinder rises, thereby reducing the generation of irritating odors and carbon oxides. In addition, the air hole at the bottom of the core outer cylinder makes it difficult to hold the flame, which prevents uneven flame holding due to irregular flame holding, and also prevents irregular flame holding when the combustion rate decreases. A standing flame.

It can also prevent yellow fire from occurring.

Hereinafter, one practical example of the present invention will be explained based on the drawings.

In FIG. 1, a liquid fuel combustion apparatus is shown, and numeral 1 is a combustion tube, and 2 is an outer tube having a transmission tube 3 made of heat-resistant glass or the like on its upper part. Reference numeral 4 denotes a red-hot cylinder made of wire mesh or the like, which is provided with an outer flame cylinder 5 having a plurality of air holes 6a at its lower part, and a red-hot cylinder connected to the upper part of the transmitting cylinder 3 through a ring 6 at its upper part. 4. An inner flame tube 7 having a plurality of air holes 7d is provided inside the outer flame tube 6, and the outer flame tube 6. A combustion chamber 8 is constituted by the inner flame tube 7. The inner flame tube 7 is provided with a top plate 9 having a plurality of ventilation holes 9a, and a flame expansion plate 10 is provided on the top of the top plate 9. In addition, there are a plurality of ventilation holes 11 in the inner flame cylinder 7.
A partition plate 11 having a diameter is provided. The inner flame tube 7 is supported by a core guide tube 12, and the outer flame tube 6 is supported by a core outer tube 13. The outer core cylinder 13 is provided facing the master 14, the lower part of the outer core cylinder 13 is provided closer to the master 14 than the upper part, and the lower part of the core outer cylinder 13 is provided with a plurality of air holes 13a. The air holes 13a are smaller in diameter than the plurality of air holes 13b provided in the upper part of the core outer cylinder 13, and 016, which is provided in large numbers, is a fire wick, and 16 is a wick holding metal fitting.

FIG. 2 shows an enlarged cross-section of the main part of the above embodiment, and since the lower part of the core outer cylinder 13 is provided closer to the master 14 than the upper part, and a plurality of air holes 13a are provided, the liquid fuel combustion apparatus is At startup, the amount of air from the air holes 13a gradually increases as the temperature rises, suppressing the generation of irritating odors and carbon monooxide and arsenic.

'Also, the lower air hole 13a of the core outer cylinder 13 is connected to the upper air hole 13.
Since the diameter is made smaller than b, the air flow velocity from the air hole 13a increases, the air hole 13a is no longer able to hold the flame, and the master 1
4 to provide a stable air flow with an even distribution at all times.

On the other hand, since the upper air hole 13b of the core outer cylinder 13 has a large diameter, stable flame holding can be obtained from the time of startup, and when the combustion amount decreases due to the use of fuel containing high boiling point components, a large amount of air flows into the air hole 13b. Since the flame flows in from the main body 14, the flame surface approaches the master 14, increases the temperature of the master 14, increases the amount of pore gas, and prevents a decrease in the amount of combustion.

In addition, the lower air holes 13a of the core outer cylinder 13 do not maintain flame stability even during startup, during steady combustion, and when the combustion amount decreases. It is possible to give a lot of energy and obtain a large amount of energy.

As mentioned above, according to the present invention, the effects listed below are achieved.

(1) The air hole at the bottom of the outer wick tube is located close enough to the wick to prevent flame holding, so due to the resistance of the passage, more air flows in than the air hole at the top of the outer wick tube. Nigui. For this reason, the sudden increase in air volume due to the rise in temperature at startup is suppressed, and the air volume gradually increases.
It is possible to suppress the generation of irritating odor due to the rise of vaporized gas and the generation of carbon monoxide due to the cooling effect from various parts of the combustion tube due to the sudden rise of flame.

(2) Since the air hole at the bottom of the wick outer cylinder is provided relative to the lamp wick, the airflow speed in the passage is fast and the airflow is close to the lamp wick.
The flame cannot be held stable due to the high concentration of hygas. Therefore, a stable and uniform air flow is always obtained, preventing uneven flame holding at the top of the combustion cylinder due to irregular flame holding in the core and outer cylinder during startup, and preventing unevenness in the glowing cylinder due to uneven flame holding at the top of the combustion cylinder. It is possible to prevent standing flames and yellow flames due to local overheating of the wick due to irregular flame holding of the wick outer tube.

(3) Vaporized gas with a high flow rate rises from the bottom of the core outer cylinder,
Since the flow velocity is weakened and diffused in the earth part of the outer core cylinder, it is efficiently diffused with the air flow from the air hole in the upper part of the outer core cylinder, and good combustion and flame stability can be obtained.

(4) Since the lower part of the wick outer cylinder is close to the lamp wick, the air flowing in from the air hole at the lower part of the wick outer cylinder rises at a high flow rate along the wick, which can further promote vaporization of the wick. .

[Brief explanation of drawings]

FIG. 1 is a front half-sectional view showing a liquid fuel combustion device that is an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of the device,
FIG. 3 is an enlarged sectional view of a main part of a conventional liquid fuel combustion device. 4... Red-hot tube, 6... Outer flame tube, 7...
...Inner flame tube, 13...Core outer tube, 13a...
... Air hole at the bottom of the core outer cylinder, 1'3b ... Air hole at the top of the core outer cylinder, 14 ...... 1 core 〇 Name of agent Patent attorney Toshio Nakao et al. 1 person 11
Figure 81Figure 2Figure 3

Claims (2)

[Claims] (1) A lamp wick that has a master that vaporizes and burns liquid fuel, a wick guide tube that guides the wick from the inside, a wick outer tube that guides the wick from the outside, and a combustion chamber that saves the formation and has a plurality of air holes. The wick outer tube is provided with an inner flame tube and an outer flame tube, and in the vertical direction of the wick outer tube facing the master of the wick, a lower part is provided closer to the master than the upper part, and a plurality of air tubes are provided in the upper and lower parts, respectively. A liquid fuel combustion device formed with holes. (2) Liquid fuel combustion according to claim 1, wherein the inner diameter of the air hole provided in the lower part of the outer core cylinder is smaller than the inner diameter of the air hole provided in the upper part of the outer core cylinder. Device. (@ The liquid according to claim 1 or 2, wherein the number of air holes provided in the lower part of the outer core cylinder is greater than the number of air holes provided in the upper part of the outer core cylinder. Fuel combustion equipment.