JPH01102204A - Burner - Google Patents

Abstract

PURPOSE:To decrease the concentration of CO when combustion rate is throttled, and to increase the range of control to the combustion rate, by detachably providing a specified flow control cylinder to the inside of an inner flame cylinder of which lower part is expanded. CONSTITUTION:A flow control cylinder 21 is provided to the inside of an inner flame cylinder 6. It extends to the neighborhood of the top of an inner flame cylinder 6 from a position in the neighborhood facing to a wick 1, and it nearly shuts off a flow controlled area 22 being formed between it and the inner flame cylinder 6 by the bottom part of it. The flow control cylinder 21 is fixed detachably and is held by the inner flame cylinder at least by a fixing pin 10. An expanded part 6a is formed in the lower part of an inner flame cylinder 6. As a structure is such that unburnt gas is introduced in the flow controlled area 22, and it is concentratedly supplied to a flame chamber from the air holes of an inner flame cylinder in the neighborhood at the top of a flow control cylinder, being mixed with fresh air supplied to the upper part of a flow control cylinder 21. Accordingly the inside of the top of an inner flame cylinder is kept clean and unburnt gas content is little there, as well as combustion is promoted. The flow control cylinder can be easily assembled in a burner unit because it is detachably fixed and is held in a position by the fixing pin. The inner flame cylinder 6 is prevented from being deformed by forming the expanded pipe 6a in the lower part.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to combustion 2-7 used for home heating, etc.
' It is related to equipment.

Conventional technology Conventionally, as this type of combustion device, there is a suction vaporization type combustion device used in kerosene stoves, etc., but as shown in Fig. 3, this type of combustion device has an inner flame tube with many air holes. The tip of the wick 54, which is a fuel supply section, is exposed in the combustion chamber 53 formed between the outer flame tube 51 and the outer flame tube 52, and the fuel is vaporized and burned. Normally, the outer flame cylinder 52 forms a red-hot part 56 having a through hole 568 with a large opening area above the constricted part 55m of the outer cylinder 55, and the fuel vaporized from the lamp wick 54 and the through hole 56a''. The air introduced into the combustion chamber 53 was mixed and combusted, causing the red-hot section 56 to become red-hot to obtain radiant heat.

Problems to be Solved by the Invention However, the above conventional configuration has caused the following problems. That is, in FIG. 2, solid arrows indicate the flow of air, and dashed arrows indicate the flow of unburned gas. As is clear from this drawing, in the conventional combustion device, unburned gas leaks inside the inner flame tube 51, and when the combustion amount is reduced, it flows upward, increasing the amount of CO. It was not possible to widen the combustion amount adjustment range.

The present invention was made in view of these points, and it not only reduces the amount of CO when the combustion amount is reduced to widen the range of adjustment of the combustion amount, but also prevents deformation of the combustion device due to assembly processing or changes over time, especially The purpose is to prevent deformation of the inner flame tube.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion apparatus of the present invention provides a combustion system in which a portion of the inner flame cylinder is disposed inward from a position near the position facing the fuel supply section to a position below the upper end of the inner flame cylinder. A flow control tube that extends and substantially shields a control area formed between the inner flame tube and the inner flame tube with its bottom surface is detachably provided, and this flow control tube penetrates the outer flame tube, inner flame tube, and outer flame tube. It is held by a fixing pin and the lower part of the inner flame tube is expanded.

Effect of the present invention With the above-described configuration, unburned gas is introduced into the restriction area, and while this unburnt gas is mixed by clean air supplied above the restriction tube, the inner flame tube near the upper end of the restriction tube is mixed. The air is intensively supplied to the combustion chamber through the air holes to promote combustion, and the inside of the upper end of the inner flame cylinder can be kept clean with few unburned gas components. Further, since the flow restricting tube is removably fixed and held by a fixing pin, it can be assembled into the inner flame tube without the troublesome work of fixing it inside the inner flame tube.

Furthermore, since the flow control tube is detachable, deformation of the raw inner flame tube can be prevented by expanding the lower part of the inner flame tube. In addition, by expanding the lower part of the inner flame tube and placing it closer to the wick, it is possible to suppress the generation of tar and strengthen the tar resistance.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a lamp wick, which is set between an inner wick tube 2 and an outer wick tube 3 so as to be vertically movable. The upper ends of the inner core cylinder 2 and the outer core cylinder 3 form an inner fire pan 4 and an outer fire pan 5, respectively.
An inner flame cylinder 6 is placed on the inner fire pan 4, and an outer flame cylinder 7 is placed on the outer fire pan 5. Reference numeral 6a denotes an expanded tube portion formed below the inner flame tube 6, which is moved closer to the lamp wick by the expanded tube. The tip of the wick 1 becomes the inner flame cylinder 6 during combustion.
It is exposed in the combustion chamber 8 formed between the outer flame tube 7 and the outer flame tube 7, and combustion is carried out here. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are sequentially arranged approximately concentrically from the inside and are integrated by a fixing pin 10. Reference numeral 11 indicates a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7. Reference numeral 12 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and is spot welded to the inner flame tube 6. 13 is a ventilation hole provided in the inner flame tube top plate 12. 14 is a flame expansion plate placed on the top plate 12 of the inner flame tube. A constriction part 15 is formed at the upper end of the outer cylinder 9, and a glowing part 16 is formed in the outer flame cylinder 7 above the constriction part 15, and a through hole 17 with a large opening is provided.

18 is a transparent tube made of a transparent material such as glass, and the outer tube 9
is placed on top. 19 is the top frame, red hot part 1
It is placed on the upper end of the incandescent part 16 so as to cover the upper end of the air passage 2° between the transmitting cylinder 18 and the transmitting cylinder 18, and fixing the transmitting cylinder 18. Reference numeral 21 denotes a flow control tube installed inside the inner flame tube 6, through which a fixing pin 10 is passed and held inside the inner flame tube 6. The flow control tube 21 extends upward from the vicinity of the position facing the tip of the lamp wick 1 to the vicinity of the tip of the inner flame tube 6, and is provided so that the control region 22 formed between the inner flame tubes 6 is substantially shielded by its bottom surface. It is being 23 is an air introduction path.

Reference numeral 24 denotes a combustion control tube, which is set at the upper part of the inner side of the outer flame tube air hole section 25, and whose upper end extends to the vicinity of the position facing the throttle section 15 of the outer tube 9, forming an air chamber 26 between it and the air hole section 25. It is spot welded to the outer flame tube 7 as shown. Reference numeral 27 denotes communication holes provided in the wall surface of the combustion control cylinder 24, which are uniformly provided in large numbers so as to communicate the air chamber 26 and the combustion chamber 8. 28 is a vent provided in the lower wall surface of the flow control tube "21".
Reference numeral 9 denotes a shielding part that divides the control area 22 into a monarch area 30 and a monarch area 31 directly above the ventilation hole 28, and is formed by making the flow restriction tube 21 protrude toward the outer circumference by applying beading, flaring, etc. are doing.

Reference numeral 32 denotes a ventilation section that is set to have a constant interval between the flow control tube 21 and the inner flame tube top plate 12.

In the above configuration, when the wick 1 is ignited, combustion starts, and high-temperature combustion gas due to combustion rises up the combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows into the inner flame tube 6 and outer flame tube 7. The fuel is supplied into the combustion chamber θ through the hole 11 and the through hole 17 of the red-hot part 16, and combustion continues. At this time, the inner flame tube 6
Air supplied from inside is passed from below the flow control tube 21 to the lamp wick 1.
The flow is divided into air that is supplied nearby and air that ascends through the air introduction path 23. A portion of the rising air passes through the vent 28 and is supplied to the combustion chamber 8. In addition, the inner flame tube 6
The air supplied upward is supplied to the combustion chamber 8 and above from the air hole 11 and the ventilation hole 13. A portion also descends into the royal region 31 and is also supplied to the combustion chamber 8 from the relatively lower air holes 11 . On the other hand, the vaporized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8. However, since the pressure in the monarchy basin 30 and the monarchy basin 31 becomes negative,
A part of the mixed gas flows into the upper control area 31 of the upper control area 301. However, this unburned gas is mixed with the air flow coming in from the vent hole 28 and the vent section 32, and is again supplied to the combustion chamber. Therefore, during strong twist firing, unburnt gas and air are mixed well from near the upper end of the inner flame tube 6 into the combustion chamber 8.
Since it is supplied to the vicinity of the upper end, it is efficiently combusted in the vicinity of area A, and unburned gas that is not completely combusted here is combusted by the flame formed above. Next, when the exposed height of the lamp wick 1 is lowered to reduce the amount of combustion, the flame gradually descends into the combustion chamber 8. The flow in this case is the same as that in the case of hard twist firing, but since the amount of vaporized gas is greatly reduced, the amount of unburned gas flowing into the royal area a1 is also reduced. Therefore, the vicinity of region B becomes a good mixing region, a flame holding state is formed in this region, the wall surface of the inner flame cylinder 6 becomes red-hot, and the combustion is completed with the flame formed above it. In this case, the monarchy basin 3
Most of the unburned gas that has flowed into the combustion chamber 8 is supplied to the combustion chamber 8 and burned by the flame, so there is almost no unburned gas component in the monarch basin 31 that faces above the flame, and The air discharged from the air holes 11 and ventilation holes 13 is clean, and the exhaust gas characteristics (Co/C02) do not deteriorate. Therefore, the amount of combustion can be reduced to a considerably low level, and the range of combustion adjustment is wide.

The combustion tube of this embodiment has the combustion control tube 24 provided on the side of the outer flame tube, which has the advantage of further improving exhaust gas characteristics. In other words, the air from the outside is transferred to the constricted part 15 at the upper end of the outer cylinder 9.
The air is divided into air from the air hole 11 of the outer flame cylinder 7 and air from the through hole 17 of the red-hot part 16, and is supplied into the combustion chamber 8, respectively. At this time, flame holding is formed in the air hole 11 of the outer flame cylinder 7 and the through hole 17 of the red-hot part 16, but a part of the unburned gas in the combustion chamber 8 is ignited into the inner flame at the part facing the throttle part 15. A phenomenon occurs in which the air leaks into the air passage 20, although not from the cylinder side, and a part of it is directly discharged from the upper part of the through hole 17 of the red-hot part 16, which worsens CO7CO2 during low combustion. The above-mentioned combustion control tube 24 is provided to reduce this, and the unburned gas is locally combusted in the air chamber 26 using air from the outer flame tube vent 25 to reduce the amount of unburned gas leaking. If the amount of unburned gas leaking out is small, the amount of unburned gas that leaks out will reach the drum 10 in the combustion chamber as shown by the black arrow C.
The air is drawn into the combustion chamber 8 by the behnoft and combusted, and air flows along the outer flame tube 7, thereby halving the deterioration of Co/CO2. Therefore, the amount of combustion can be reduced to a much lower level, and the range of combustion adjustment is wide.

Also, during ignition, air is efficiently supplied to the lower part of the combustion chamber 8 from the communication hole 27 and the ventilation hole 28, so that combustion is quickly promoted and less CO1 odor is generated. Also,
A similar effect can be obtained when burning for a long time in a well-sealed room. That is, under oxygen-deficient conditions, the amount of combustion decreases as the oxygen concentration decreases, and a phenomenon similar to that observed when the exposed height of the lamp wick 1 is lowered to reduce the amount of combustion is observed. Since air is supplied to the combustion chamber 8 through the vent hole 28, combustion is promoted there and oxygen deficiency characteristics are also improved.

By the way, as mentioned above, the exhaust gas characteristics (Co/C02)
The flow control tube 21 is an important component for maintaining the flow in good condition. This flow control cylinder 21 is penetrated by a fixing pin 10 and is detachably held inside the inner flame cylinder 6, so that it can be easily assembled and disassembled. Therefore, it is possible to reduce the number of man-hours in the production process,
Since there is no need to provide parts for installation or perform welding, etc., it is effective in reducing costs, and is also very convenient when replacing parts in the market.

However, on the contrary, the inner flame tube 6 is located at the top of the inner flame tube top plate 12.
There is no means to hold the cylinder except that it is spot welded to hold the cylinder. In other words, since the shape is not maintained except in the upper part, the inner flame cylinder is easily deformed during assembly and becomes out of roundness, but the lower part of the inner flame cylinder 6 is provided with an enlarged tube part 6a to improve strength. Therefore, the roundness of the inner flame tube 6 can be maintained sufficiently not only during assembly but also during use. Note that if the roundness is not achieved, the combustion chamber 8 will become narrower or wider in some parts. Therefore, in a narrow space, the flow velocity in the combustion chamber 8 increases, which may cause uneven redness in the red-hot portion 16 of the outer flame tube 7, and the flame formed above may lift and emit an odor. On the other hand, in a large place, yellow flame will form in the combustion chamber 8. However, in the case where the tube expansion part 68 is provided below the inner flame cylinder 6,
The above-mentioned problems do not occur, and stable combustion can be produced. Also, during actual use, the inner flame tube 6 becomes hot and easily deforms, but with the inner flame tube 6 whose lower portion is expanded, such concerns are eliminated.

Furthermore, since the expanded pipe portion 6a is provided below the inner flame tube 6, it also has the effect of reducing tar adhesion to the lamp wick 1, which is likely to occur when inferior kerosene is used. That is,
FIG. 2 shows an enlarged cross-sectional view of the main part near the lamp wick 1. The air hole 11 in the expanded tube part 6a of the inner flame tube 6 is located close to the lamp wick 1, and the air hole 11 is located close to the lamp wick 1. A fresh air flow 33 is created along the line. Therefore, the inside of the lamp wick 1 is vaporized well, and the tar resistance is improved.

Effects of the Invention As is clear from the description of the embodiments, according to the combustion apparatus of the present invention, not only the amount of combustion can be adjusted widely, but also the flow restricting tube can be fixed to the inner flame tube, outer flame tube, Since it is detachably held approximately concentrically with the outer cylinder, it can be easily assembled and disassembled. Furthermore, since the flow control tube is detachable from the inner flame tube, the shape of the inner flame tube cannot be maintained, which can be solved by providing an expanded tube. Abnormal combustion etc. can also be prevented. In addition, by expanding the lower part of the inner flame tube and moving it closer to the wick, tar production can be suppressed and tar resistance can be strengthened, creating a combustion device that is easy to assemble, safe, and durable. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustion device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is a sectional view of a main part of a combustion device showing a conventional example. 1...Light wick, 6...Inner flame cylinder, 6a...
...Pipe expansion part, 7...Outer flame tube, 8...
・Combustion chamber, 9...Outer cylinder, 10...Fixing pin, 11...Air hole, 18...Transmission tube, 21...・Flow control tube, 22... Control area. Name of agent: Patent attorney Toshio Nakao and 1 other person/
--One light friend 6- Inner flame room 6a-Kokanxun 7-Outer IA question 8- MojlL room 2I-◆J Kofu Figure 3

Claims (1)

[Claims] an outer flame tube having a large number of air holes; an inner flame tube having a large number of air holes disposed inside the outer flame tube; an outer tube located outside the outer flame tube; A fixing pin that penetrates the outer flame tube/outer tube, a transparent tube placed above the outer tube, and a lamp wick that is vertically movable and set at the lower end of the combustion chamber between the outer flame tube and the inner flame tube. A flow restriction is provided inwardly of the inner flame tube, extending from near a position facing the lamp wick to near the upper end of the inner flame tube, and substantially shielding a restriction area formed between the inner flame tube and the inner flame tube with a bottom surface. A combustion device comprising: a cylinder; the flow control cylinder is detachably fixed to at least an inner flame cylinder with a fixing pin; and an enlarged tube part is formed in the lower part of the inner flame cylinder.