JPH01142304A - Combustion equipment - Google Patents

Abstract

PURPOSE:To inhibit the quantity of CO during low combustion, widen a combustion control range, and improve red-hot brightness by supplying air upward to the unburnt gas which has penetrated a flow control region for combustion equipment, such as an oil stove for combustion promotion and reducing the wall thickness of an outer combustion cylinder. CONSTITUTION:An internal combustion cylinder 6, an external combustion cylinder 7, and a sleeve 9 are laid out concentrically where the external combustion cylinder 7 is thinner in wall thickness than the internal combustion cylinder 6 and a red-hot section 16 is formed upward. Within the internal combustion cylinder 6 a flow control cylinder 21 is provided in such a manner that it may substantially cover a flow control region 22 on the bottom. Unburnt gas partially penetrates a lower flow control region 30 and upper flow control region 31. The penetrated gas is mixed with the air flowing from a vent hole 28 and a ventilating section 32, and is subjected to combustion once again within a combustion chamber 8. Controlled flames are formed around a region B during low combustion, thereby heating red the internal flame cylinder 6 and carrying out complete combustion with the flames in the upper parts. The present invention enables making the best use of the improvement in red-hot brightness of the internal flame cylinder 6, since the wall thickness of the external flame cylinder 7 is made of a thin plate and the heat capacity is small in this construction.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a combustion device used for home heating and the like.

2. Description of the Related Art Conventionally, as this type of combustion device, there is a suction vaporization type combustion device used in kerosene stoves and the like. As shown in Fig. 2, the tip of the wick 54 is exposed in a combustion chamber 53 between an inner flame tube 51 and an outer flame tube 52, which have a large number of air holes, to vaporize and burn the fuel. . Normally, the outer flame cylinder 52 has a red-hot part 56 above the throttle part 55 of the outer cylinder 55, which has a through hole 56- with a large opening area, and the fuel vaporized from the lamp wick 54 is combusted through the through hole 56,1. The mixture was mixed with air introduced into the chamber 53 and combusted, making the red-hot part 56 red-hot and obtaining 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 cylinder 51, and when the combustion amount is reduced, it flows upward, increasing the amount of CO. Therefore, it was not possible to widen the combustion amount adjustment period.

The present invention was made in view of these points, and aims to reduce the amount of CO when the combustion amount is reduced, widen the period during which the combustion amount is adjusted, and at the same time improve the red glow brightness.

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 is provided, and the outer flame tube is formed to have a thinner plate thickness than the inner flame tube.

Effect of the present invention With the above-described configuration, the unused gas flowing into the restriction area is mixed with clean air supplied above the restriction tube, and is intensively combusted from the air hole of the inner flame tube near the upper end of the restriction tube. In addition to improving the red glow brightness of the inner flame tube, the glow brightness of the outer flame tube is also improved due to the thinner plate thickness, and the red glow of the entire combustion tube is improved. Brightness is improved.

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 tube 2 and the outer core tube 3 form an inner flame tray 4 and an outer flame tray 5, respectively, on which an inner flame tube 6 and an outer flame tube 7 are placed. During combustion, the tip of the wick 1 is exposed in a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where combustion is vaporized. 9 is an outer cylinder, which includes an inner flame cylinder 6, an outer flame cylinder 7, and an outer cylinder 9.
are arranged in a substantially concentric manner sequentially from the inside, and are integrated by a fixing pin 10. 11 is an inner flame tube 6S and an outer flame tube 7
It has many air holes. Reference numeral 12 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and has a ventilation hole 13 communicating upward from the inside of the inner flame tube 6. 14 is the inner flame tube top plate 1
This is a flame spreader plate placed on 2. 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.
7 is provided. The outer flame tube 7 is formed to have a thinner plate thickness than the inner flame tube 6. Reference numeral 18 denotes a transparent tube made of a transparent material such as glass, and is placed on the outer tube 9.

A top frame 19 is placed on the upper end of the red-hot part 16 so as to cover the upper end of the air passage 20 between the red-hot part 16 and the transmission cylinder 18, and fixes the transmission cylinder 18. Reference numeral 21 denotes a flow control tube installed inside the inner flame tube 6, which extends upward from near the position facing the tip of the wick 1 to near the tip of the inner flame tube 6, and has a control area 22 formed between the inner flame tubes 6. It is provided so that it is substantially shielded by its bottom surface. Reference numeral 23 denotes an air introduction passage formed inside the flow restriction cylinder. Reference numeral 24 denotes a combustion control tube, which is set at the upper part of the outer flame tube air hole portion 25.7I, and whose upper end extends to the vicinity of the position facing the throttle portion 15 of the outer cylinder 9, and an air chamber 26 is formed between it and the air hole portion 25. has been done.

Reference numeral 27 denotes a communication hole provided in the wall surface of the combustion control cylinder 24, which is a ventilation hole provided in the combustion control cylinder 24. Reference numeral 29 denotes a shielding part that divides the control area 22 into a monarch area 30 and an upper area 31 just above the ventilation hole 28, and is formed by applying beading or flaring to make the flow control tube 21 protrude toward the outer circumference. It is. 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 lamp wick 1 is ignited, combustion starts, and high temperature combustion gas due to combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion is transferred to the inner flame tube 6 and the outer flame tube 7. The fuel is supplied into the combustion chamber 8 through the hole 11 and the through hole 17 of the red-hot section 16, and combustion continues. At this time, the air supplied from inside the inner flame tube 6 is divided into air supplied from below the flow control tube 21 to the vicinity of the lamp wick 1, and air flowing upward 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. Furthermore, the air supplied above the inner flame cylinder 6 is supplied to the combustion chamber 8 and above from the air hole 11 and the ventilation hole 13. Also, some
It descends into the upper flow 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 royal basin 302 and the upper basin 31 becomes negative, part of the mixed gas flows into the royal basin 30 and the upper basin 31. 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, unburned gas and air are supplied from near the upper end of the inner flame tube 6 in a well-mixed state to the upper end of the combustion chamber 8, so that they are efficiently combusted near the area A-El, and are completely burned here. The remaining unburned gas is combusted by the flame that forms 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 also the same as in the case of strong twist firing, but since the amount of vaporized gas is greatly reduced, the amount of unburned gas flowing into the upper flow region 31 is also reduced. Therefore, the vicinity of area B becomes a good mixing area, a flame holding is formed in this area, and the wall surface of the inner flame tube 6 becomes red hot.
Furthermore, the flame formed above completes the combustion.

In this case, most of the unburned gas that has flowed into the upper basin 31 is supplied into the combustion chamber 8 and burned by the flame, so that in the upper basin 31 facing above the flame, almost no unburned gas components are present. There are no air holes 11 or ventilation holes 1 above the flame.
The air discharged from 3 is clean and has exhaust gas characteristics (Go/C0
2) does not get worse.

Therefore, the amount of combustion can be reduced to a considerably low level, and the range of combustion adjustment is wide.

On the other hand, when the combustion in the inner flame tube 6 is promoted as described above, the red glow brightness of the inner flame tube 6 is improved compared to the conventional one. At the same time, the heat capacity of the outer flame cylinder 7 side is also reduced by the thinner plate thickness, and the red glow brightness is improved. In other words, the outer flame tube 7 does not offset the increase in the red glow brightness of the inner flame tube 6. Therefore, the inner flame tube 6
The red-hot brightness of the combustion tube as a whole can be improved by making full use of the increased red-hot brightness.

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.
And the air hole 11 of the outer flame tube 7 and the red hot part 16? The air from the holes 17 is divided and 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 2o, 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 the CO/CO2 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. This causes the leaked unburned gas to be drawn into the combustion chamber 8 by the draft inside the combustion chamber and combusted as shown by the black arrow C, and also to cause air flow along the outer flame tube 7, thereby increasing the amount of Go/CO2. The deterioration is halved. Therefore, the amount of combustion can be reduced to a much lower level, and the range of combustion adjustment is wide.

Also, at the time of ignition, air is efficiently supplied to the lower part of the combustion chamber from the communication hole 27 and the vent hole 2, 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 from the vent hole 2, combustion is promoted there and oxygen deficiency characteristics are also improved.

Effects of the Invention As is clear from the description of the embodiments, according to the combustion apparatus of the present invention, the period during which the combustion amount is adjusted is extended, the red glow brightness is also improved, and effective heating becomes possible.

[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, and FIG. 2 is a sectional view of a main part of a combustion device showing a conventional example. 1...Light wick, 6...Inner flame cylinder, 7...
...Outer flame tube, 8... Combustion chamber, 9...
Outer cylinder, 11... air hole, 18... transmission tube, 21... flow control cylinder, 22... control area.

Claims (1)

[Claims] an outer flame tube consisting of a pore section having a large number of air holes and a red-hot section formed above the pore section, an inner flame tube having a large number of air holes disposed inside the outer flame tube, and the outer flame tube. The inner tube includes an outer tube located outward, a transparent tube placed above the outer tube, and a lamp wick that is vertically movable at the lower end of the combustion chamber between the outer flame tube and the inner flame tube. A flow control tube is provided inwardly of the flame tube, extending from near a position facing the lamp wick to near an upper end of the inner flame tube, and substantially shielding a control area formed between the inner flame tube and the inner flame tube with a bottom surface, and A combustion device in which the thickness of the outer flame tube is thinner than the thickness of the inner flame tube.