JPS60186614A - Burner - Google Patents

Abstract

PURPOSE:To promote the mixing operation within a secondary combustion chamber by forming secondary air holes exclusively used for secondary air at the upper part of an external flame cylinder to constitute a secondary combustion part, and providing a throttle plate at the upper part of an internal flame cylinder which is placed at a position which is on equal level or lower than the secondary air holes. CONSTITUTION:In a small-size oil heater and an oil oven, an unburnt gas of a high temperature and a dense concentration in which air is short, is collected once around the entire periphery of the upper part of the external flame cylinder 1 which is placed at a position which is lower than the top plate 9 of an internal flame cylinder 9 and the secondary air holes 3, and is uniformly carried to the vicinity of a plurality of secondary air holes 4 formed on the opposite side of the top plate 9 of the internal flame cylinder 1 and provided positionally on the same level as the top plate 9 thereof by means of the throttle plate of the internal flame cylinder 9. Since a large amount air divided finely is supplied from a large number of secondary air holes 3 to the dense unburnt gas, the unburnt gas and the secondary air stream are finely divided, diffused and mixed at a high speed and effectively. Accordingly, the unburnt gas is difficult to generate soots of blue flame and short flame, odors and a poisonous gas such as carbon monoxide and produce a ring-shaped secondary combustion flame 21 to carry out a complete combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a small space heater that obtains heat by burning fuel, and a combustion device used in a stove or the like.

Conventional structure and its problems Conventionally, especially in dual-tube combustion devices that use a lamp wick to vaporize and burn liquid fuel, the secondary flame formed in the secondary combustion chamber is The mixing action of the transported unburned gas becomes slow, resulting in not only a long yellow flame and lopsided combustion, but also incomplete combustion, resulting in soot and soot.
-Carbon oxide.

T-type electric ingots generate a lot of harmful gases such as odors, and have problems such as the combustion chamber cannot be made smaller.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional problems, and promotes the mixing action inside the secondary combustion chamber to achieve complete combustion while making the flame bluer and shorter. Kokichi's aim is to provide a small combustion device that is clean and has a high combustion load and does not easily generate harmful gases.

Structure of the Invention In order to achieve this object, the present invention comprises a secondary combustion section by forming a dedicated secondary air hole in the upper part of the outer flame tube.
A throttle plate provided on the upper part of the inner flame tube facing the secondary air hole is arranged at the same level as or below the secondary air hole.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes an outer flame tube, which has a plurality of large and small primary air holes 2 at the bottom and a rounded secondary air hole 3 at the top. Furthermore, a secondary combustion ring 4 having a step is provided at the upper part. Reference numeral 6 denotes an inner flame tube with a plurality of primary air holes 6, and a partition plate 8 with air holes 7 is provided inside the lower part.
An inner flame cylinder top plate 9 is provided at the upper end. The upper part of the inner flame tube top plate 9 has a diameter larger than that of the inner flame tube 5, and is opposed to the secondary air hole 3, and the height position is equal to or less than the secondary air hole 3. The primary combustion chamber 10 is located between the inner and outer flame tubes 5 and 1, and the secondary combustion chamber 11 is defined between the secondary combustion ring 4 and the inner flame tube top plate 9. Tomorrow with what you have.

Reference numeral 12 denotes an outer cylinder having a seat 13 on the upper part, and on the seat 13, a glass cylinder 14 made of a thermotransparent material on one side and a top plate 16 equipped with an incandescent body 16 made of a plurality of rings etc. are placed. death,
With the cross bins 17, 17', the inner flame cylinder 6. The outer cylinder 12 is concentric with the outer flame cylinder 1 and constitutes a dual-tube type combustion cylinder. 18 is a lamp wick; 19 is a vertical movement guide for the lamp wick 18;
This is a fire pan on which an outer flame cylinder 6°1 is placed. 20 is the primary combustion flame generated in the primary combustion chamber 10, 21 is the secondary combustion chamber 11
This is the secondary combustion flame generated within the combustion chamber. In addition, secondary air hole 3
As shown in FIG. 2, the upper part of the outer flame cylinder 1 may be bored in a peripheral wall configured like an outer circumference.

The operation of the embodiment will be described above in accordance with the more detailed embodiment shown in FIG. When the liquid fuel is sucked up by the wick 18 and ignited on the wick 18 from the outside of the inner and outer flame tubes 6, 1 in the manner described above, the primary air holes 6. Air is supplied around the lamp wick 18 from 2, combustion starts all around the lamp wick 18, and combustion is promoted by the combustion heat 7.
The vaporization of the liquid fuel from the lamp wick 18 is promoted, the amount of combustion is increased, the combustion spreads throughout the primary combustion chamber 10, and a large number of primary combustion flames 20 are generated, and the combustion is further activated and promoted. Eventually, the primary combustion chamber 10 becomes overloaded, and the unburned gas rises when the secondary combustion chamber 11=1. However, a large amount of unburned gas rising from the primary combustion chamber 10 to the secondary combustion chamber 11 receives high-temperature heat from the large number of primary combustion flames 20 and is susceptible to thermal decomposition due to lack of air. This phenomenon means that yellow fire, soot, and large amounts of carbon monoxide are likely to be generated. Therefore, the unburned gas with a high concentration, which tends to be air-deficient at high temperatures, is stored at one end of the inner flame tube large plate 9.
It is concentrated around the entire upper part of the outer flame tube 1 on the -F side of the secondary air hole 3, and is provided on the opposite side of the inner flame tube top plate 9 and at a position equal to or higher than the inner flame tube top plate 9. By uniformly transporting the dense unburned gas to the vicinity of the plurality of secondary air holes 3 formed on the entire upper circumference of the outer flame cylinder 1, a large number of secondary air
Since a large amount of finely divided air is supplied from the secondary air hole 3, the unburned gas 7 secondary air flow is finely divided and diffused and mixed at high speed and effectively. Therefore, the unburned gas is not thermally decomposed, but instead forms a ring-shaped secondary combustion flame 20 in the secondary combustion chamber 11 that is blue and short and does not easily generate harmful gases such as soot, odor, and carbon oxide. It is generated and completely combusted. The incandescent body 16 is heated to a high temperature by receiving the heat of the secondary combustion flame 21 of the complete combustion flame, and emits high-temperature radiation to effectively contribute to heating and the like. Next, to extinguish the fire, the wick 18 is lowered from the surface of the fire pan 19, and the fuel is cut off from within the primary combustion chamber 10, thereby extinguishing the fire.

Since the diameter of the outer flame tube 1 is larger than that of the inner flame tube 6, it is possible to provide about 30% more secondary air holes 3 than on the outer periphery of the inner flame tube 6, and the secondary combustion chamber 11 can be provided by that amount. This is something that can reduce the combustion load inside the dog.

Effects of the Invention As described above, according to the configuration of the present invention, the following effects can be obtained. In other words, the high temperature and high concentration unburned gas rising from the primary combustion chamber is uniformly concentrated below the secondary air holes at the top plate of the inner flame tube, and then finely divided from the secondary air holes. Since a large amount of air is effectively supplied to the unburned gas, the mixing action is effectively promoted without decomposition. Therefore, a clean ring-shaped secondary combustion flame is generated near the secondary air hole of the secondary combustion chamber, which is a short blue flame and does not generate harmful gases such as soot, odor, and carbon oxide, and complete combustion is achieved. It is something. Since complete combustion occurs in this way, it is safe as a combustion equipment. In addition, since the flame can be shortened, the size can be reduced and the cost can be reduced. Furthermore, it is visually clean because it burns with Krt flame.

On the other hand, since the space between the primary combustion chamber and the secondary combustion chamber is narrowed by the inner flame cylinder top plate, the unburned gas is mixed with air efficiently and evenly, so there is no possibility of dimensional variations in the component parts. Some external fluctuations in fuel or air supply.

The mixing effect is stably promoted and maintained even against changes over time. For this reason, it is a safe combustion device that can always maintain a complete combustion state, and is highly effective.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. Second
The figure is a sectional view of a main part showing another embodiment of the present invention. 1...Outer flame tube, 2...Primary air hole, 3
...Secondary air hole, 5...Inner flame tube, 9.
...Inner flame cylinder top plate, 12...Outer cylinder.

Claims (1)

[Claims] A plurality of primary air holes are bored in the inner flame tube, an outer flame tube, and an outer tube are connected approximately concentrically to form a combustion tube, and a secondary air hole is bored in the upper part of the outer flame tube. and an inner flame tube top plate provided on the upper part of the inner flame tube facing the secondary air hole is arranged at the same level as or below the secondary air hole.