JPH071081B2 - Combustion device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for household heating or the like.

2. Description of the Related Art Conventionally, as this type of combustion apparatus, there is a suction vaporization type combustion apparatus used in petroleum stoves and the like. However, as shown in FIG. 2, this is an internal flame cylinder having a large number of air holes. A tip of a wick 54, which is a fuel supply unit, is exposed in a combustion chamber 53 between the outer flame cylinder 51 and the outer flame cylinder 52 to vaporize and burn the fuel. Further, the normal outer flame cylinder 52 forms a red heat portion 56 having a through hole 56a having a large opening area in the upper part by the narrowed portion 55a of the outer cylinder 55, and the fuel vaporized from the wick 54 and the through hole 56a into the combustion chamber. Five
The air introduced into 3 was mixed and burned, and the red heating section 56 was red-heated to obtain radiant heat.

Problems to be Solved by the Invention However, the above-described conventional configuration has the following problems. That is, in FIG. 2, the solid arrow indicates the flow of air and the broken arrow indicates the flow of unburned gas. As is clear from this drawing, in the conventional combustion device, unburned gas leaks to the inside of the inner flame cylinder 51, and when the combustion amount is reduced, it flows out upward as it is and the CO amount increases. Therefore, the combustion amount adjustment range could not be widened.

The present invention has been made in view of such a point, and when the combustion amount is narrowed down, the CO amount is reduced to widen the combustion amount adjustment range and even when the low combustion is rapidly switched to the high combustion. The purpose of this is to prevent abnormal standing flames from occurring and to prevent red heat unevenness in the upper portion of the red flame portion of the outer flame tube, which is likely to occur.

Means for Solving the Problems In the combustion apparatus of the present invention in order to solve the above problems, the inside of the inner flame cylinder extends from the vicinity of the position facing the wick to the vicinity of the upper end of the inner flame cylinder and the inner flame cylinder. A structure is provided in which a control cylinder that substantially shields the control flow area formed between them is provided at the bottom, a square hole is provided in the upper part of the red flame part of the external flame cylinder, and a red heat part through hole is opposed to the lower part of the strut between the square holes. is there.

Effect The present invention introduces unburned gas leaking inward of the inner flame tube into the restricted region when the heat generation amount is reduced by the above-mentioned configuration, and mixes this gas with clean air supplied above the restricted region. While intensively supplying to the combustion chamber to promote combustion, the inside of the upper end of the inner flame cylinder can be kept in a clean state with a small amount of unburned gas components, and the combustion amount adjustment range can be widened. Also,
A large amount of air can be sent from the square hole in the upper part of the combustion cylinder to cope with a large amount of vaporization at the time of rapid switching from low combustion to high combustion, reducing the flame spread and generating a bad odor due to incomplete combustion. In addition, the heat capacity at the lower part of the column between the square holes at the upper part of the red flame part of the outer flame tube can be reduced, and the uneven red heat that can be heated to almost the same level as other parts can be eliminated.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is a wick, and a core inner cylinder 2 and a core outer cylinder 3 are shown.
It is set so that it can move up and down. The upper ends of the inner core tube 2 and the outer core tube 3 respectively form an inner fire tray 4 and an outer fire tray 5, on which an inner flame barrel 6 and an outer flame barrel are placed. At the time of combustion, the tip of the wick 1 is exposed inside a combustion chamber 8 formed between the inner flame cylinder 6 and the outer flame cylinder 7, where the fuel is vaporized. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, the outer flame cylinder 7, and the outer cylinder 9 are sequentially arranged from the inside in a substantially concentric manner and are integrated by a fixing pin 10.
Reference numeral 11 denotes air holes provided in the inner flame cylinder 6 and the outer flame cylinder 7. Reference numeral 12 denotes an inner edge cylinder top plate that closes the upper end opening of the inner flame cylinder 6, and has a ventilation hole 13 that communicates from the inside of the inner flame cylinder 6 to the upper side. Reference numeral 14 is a flame spreading plate placed on the inner flame cylinder top plate 12. A throttle portion 15 is formed on the upper end of the outer cylinder 9, and the throttle portion 15 is further formed.
A red-heated portion 16 is formed in the outer flame cylinder 7 above 15, and a through hole 17 having a large opening is provided. A transparent cylinder 18 made of a transparent material such as glass is placed on the outer cylinder 9. 19 is a top frame, which is an air passage 20 between the red heat section 16 and the transparent tube 18.
The transparent cylinder 18 is mounted on the upper end of the red heat section 16 so as to shield the upper end of the transparent tube 18. Reference numeral 21 denotes a flow restricting cylinder installed inside the inner flame cylinder 6 from the vicinity of the position facing the tip of the wick 1 to the inner flame cylinder 6.
It is provided so as to extend upward to the vicinity of the tip and to substantially shield the restricted region 22 formed between the inner flame cylinders 6 by its bottom surface. 23 is an air introduction path. Reference numeral 24 is a combustion control cylinder, which is set inside and outside the outer flame cylinder pore portion 25, and the upper end is the throttle portion 15 of the outer cylinder 9.
To the vicinity of the position facing the
26 are formed. Reference numeral 27 denotes a communication hole provided on the wall surface of the combustion control cylinder 24, and a large number of communication holes 27 are provided uniformly so as to connect the air chamber 26 and the combustion chamber 8. Reference numeral 28 is a ventilation hole provided on the lower wall surface of the flow control cylinder 21. Reference numeral 29 is a shielding portion which divides the restriction region 22 into a lower restriction region 30 and an upper restriction region 31 directly above the ventilation hole 28, and uses the beading process or the flare process to project the restriction cylinder 21 in the outer peripheral direction. Is formed by. 32 is a control cylinder 21
This is a ventilation part that is set so as to have a constant interval between the inner flame cylinder top plate 12 and the inner flame cylinder top plate 12. 33 is a square hole provided in the upper portion of the red heat section 16 of the outer flame cylinder 7 so as to be substantially opposed to the ventilation section 32, and is much larger than the through hole 17 provided below it.
Moreover, one of the through holes 17a provided in the red heat section 16 is made to face the lower portion of the pillar 34 between the square holes.

In the above structure, when the wick 1 is ignited, combustion starts, and a high temperature combustion gas generated by combustion rises in the combustion chamber 8 to generate a thermal draft, and the air required for combustion is the air holes of the inner flame cylinder 6 and the outer flame cylinder 7. 11 and the through holes 17 of the red heat section 16 are supplied into the combustion chamber 8 to continue combustion. At this time, the air supplied from the inner side of the inner flame cylinder 6 is divided into the air supplied from below the control cylinder 21 to the vicinity of the wick 1 and the flow of air rising in the air introduction passage 23. A part of the raised air passes through the ventilation hole 28 and is supplied to the combustion chamber 8. Further, the air supplied above the inner flame cylinder 6 is supplied to the combustion chamber 8 and the upper part thereof through the air holes 11 and the air holes 13. Further, a part of the air flows down to the upper control region 31, and is also supplied to the combustion chamber 8 from the air holes 11 located relatively below. On the other hand, the vaporized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8. However, since the lower control region 30 and the upper control region 31 have a negative pressure, a part of the mixed gas leaks into the lower control region 30 and the upper control region 31. However, this unburned gas is mixed with the air flow flowing from the communication hole 28 and the ventilation part 32 into the flow restricting regions 30 and 31, and is again supplied to the combustion chamber. Therefore, during strong combustion, unburned gas and air are supplied to the vicinity of the upper end of the combustion chamber 8 from the vicinity of the upper end of the inner flame cylinder 6 in a well-mixed state, so that they are efficiently combusted in the vicinity of the region A and cannot be burned up further here. The combustion gas is burned by the flame formed above. Next, when the exposed height of the wick 1 is decreased to reduce the combustion amount, the flame gradually descends into the combustion chamber 8. The flow in this case is also similar to that in the strong combustion, but the amount of vaporized gas is greatly reduced, so the amount of unburned gas flowing into the upper control region 31 is also reduced. Therefore, the vicinity of the area B becomes a good mixing area, flame holding is formed in this area, the wall surface of the inner flame tube 6 is red-heated, and combustion is completed by the flame formed above the wall. In this case, most of the unburned gas that has flowed into the upper control region 31 is supplied into the combustion chamber 8 and burned by the flame, so there is almost no unburned gas component in the upper control region 31 located above the flame. , Air holes above the flame
The air discharged from 11 and the ventilation hole 13 is clean, and the exhaust gas characteristics (CO / CO ₂ ) do not deteriorate. Therefore, the combustion amount can be narrowed down to a considerably low position, and the combustion adjustment range becomes wide.

In particular, since this combustion cylinder is provided with the combustion control cylinder 24 on the side of the outer flame cylinder, there is an advantage that the exhaust gas characteristics are further improved. That is, the air from the outside is squeezed by the throttle portion 15 at the upper end of the outer cylinder 9 to the outer flame cylinder
The air from the air hole 11 and the air from the through hole 17 of the red heat section 16 are divided and supplied into the combustion chamber 8. 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 heat section 16, but a part of the unburned gas in the combustion chamber 8 at the portion facing the throttle section 15 is an inner flame. Although not as much as on the cylinder side, a phenomenon occurs in which the air leaks into the air passage 20 and a part of the phenomenon is discharged as it is from the upper part of the through hole 17 of the red heat section 16, so that CO / CO ₂ is deteriorated during low combustion. The combustion control tube 24 described above is provided to reduce this, and the air chamber 26 is provided by the air from the outer flame tube vaporization unit 25.
In this way, the unburned gas is locally burned to reduce the leakage amount of the unburned gas, and the leaked unburned gas is drawn into the combustion chamber 8 by the draft in the combustion chamber as shown by a black arrow C and burned. At the same time, the flow of air along the outer flame cylinder 7 is caused, and the deterioration of CO / CO ₂ is halved. Therefore, the combustion amount can be narrowed down to a lower place, and the combustion adjustment range becomes wide.

Further, even at the time of ignition, air is efficiently supplied to the lower portion of the combustion chamber 8 from the communication hole 27 and the ventilation hole 28, so that rapid combustion is promoted and CO and odor are less generated. Also, the same effect can be obtained when the material is burned for a long time in a well-sealed room. That is, in the oxygen-deficient state, the amount of combustion decreases with the decrease in oxygen concentration, and a phenomenon similar to that in the case where the exposed height of the wick 1 is decreased to decrease the amount of combustion is observed. Since air is supplied to the combustion chamber 8 from the vent hole 28,
Therefore, combustion is promoted and the oxygen deficiency characteristic is improved.

Further, steady combustion is performed as described above, but at the time of rapid switching from low combustion to high combustion, a large amount of air is sent from the square hole 33 with a large opening to a large amount of vaporization, and a flame is generated. It also reduces the growth of odor and prevents the generation of offensive odor due to incomplete combustion.

It is also possible that a large amount of this secondary air is sent from the middle stage of the red heat section 16 of the outer flame cylinder 7, but in this case, combustion is completed at that portion, flame holding in the upper part becomes unstable, and uneven red heat becomes uneven. However, if a large amount of air is sent from the above-mentioned top, such a thing will disappear.

Also, the pillar 34 of the square hole 33 requires a considerable amount of remaining margin in terms of strength, and as a result, the lower portion 34 'of this pillar 34 has a larger area and a larger heat capacity than other portions, causing uneven red heat. It will be easier. However, since one of the through holes 17a provided in the red heat section 16 is located under the pillar 34, the area under the pillar (remaining margin) is relatively small, and uneven red heat is caused. Will almost never occur.

The square hole 33 may be a round hole, but the square hole is preferable because it is necessary to enlarge the opening to the lower portion if the remaining margin is reduced while securing a constant opening area.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, according to the combustion apparatus of the present invention, the amount of CO when the amount of combustion is reduced is reduced to widen the amount of combustion adjustment and from low combustion to high combustion. Combustion that reduces flame spread even during sudden switching, prevents the generation of odors due to incomplete combustion, and also allows the outer flame tube to glow almost uniformly without red heat unevenness on the upper part of the red flame part of the outer flame tube. It is possible to obtain a safe and practically comfortable combustion device with a large amount adjustment range.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of an essential part of a combustion apparatus showing a conventional example. 1 ... wick, 6 ... inner flame tube, 7 ... outer flame tube, 8 ... combustion chamber, 9 ... outer tube, 11 ... air hole, 17 ... through hole, 18 ... through tube, 21 ...... Control pipe, 22 ...... Control region, 28 ...... Vent hole, 29
...... Shielding part, 33 …… square hole, 34 …… post.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Ishikawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor, Katsuhiko Uno 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 56) References JP-A 64-41703 (JP, A) JP-A 62-108909 (JP, A) JP-A 62-223511 (JP, A) JP-A 63-223408 (JP, A)

Claims (1)

[Claims] 1. An outer flame cylinder comprising a pore part having a large number of air holes and a red heat part formed above the pore part, and an inner flame cylinder having a large number of air holes arranged inside the outer flame cylinder. An outer cylinder positioned outside the outer flame cylinder, a permeation cylinder mounted above the outer cylinder, and a combustion chamber lower end formed between the outer flame cylinder and the inner flame cylinder so as to be vertically movable. A wick, which extends inside the inner flame tube from near the position facing the wick to near the upper end of the inner flame tube, and substantially shields the restricted region formed between the inner flame tube and the inner flame tube by the bottom surface. Combustion device in which a flow restricting cylinder is provided, a square hole is provided in the upper part of the red flame part of the outer flame cylinder, and a red heat part through hole is opposed to the lower part of the support between the square holes.