JPH071082B2 - 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 oil stoves and the like. As shown in FIG. 2, the tip of a wick 54, which is a fuel supply unit, is exposed in a combustion chamber 53 between an inner flame cylinder 51 having a large number of air holes and an outer flame cylinder 52 to vaporize and burn the fuel. It is designed to let you.
The normal outer flame cylinder 52 forms a red heat portion 56 having a through hole 56a having a large opening area above the narrowed portion 55a of the outer cylinder 55, and the fuel vaporized from the wick 54 and the combustion chamber 53 from the through hole 56a.
The radiant heat was obtained by mixing the air introduced into the interior and burning it to make the red heat section 56 red hot.

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 air flow, and the broken arrow indicates the unburned gas flow. 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 reduced, the CO amount is reduced to widen the combustion amount adjustment range and stable combustion without combustion noise or flame sway is obtained. It is intended to be done.

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 fuel supply section to a position below the upper end of the inner flame cylinder, In addition to providing a flow control cylinder that substantially shields the flow control area that is formed between the flow control tube and the inner flame cylinder, the air holes in the inner flame cylinder that face the flow restricting cylinder are placed above and below the non-perforated part. It is formed to be divided.

Action The present invention has the above-described configuration, in which unburned gas is introduced into the restricted flow region, and the unburned gas is mixed with the unburned gas by the clean air supplied above the restricted flow cylinder while the inner flame cylinder near the upper end of the restricted flow cylinder is mixed. The air can be supplied to the combustion chamber intensively from the air holes to promote combustion, and the combustion can be stabilized by smoothing the flow of unburned gas and clean air to the restricted region.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a wick, which includes an inner core tube 2 and an outer core tube 3.
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 7 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 combustion 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-flame cylinder top plate that closes the upper end opening of the inner-flame cylinder 6 and has a vent hole 13 that communicates upward from the inside of the inner-flame cylinder 6. 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 a red heat portion 16 is formed on the outer flame cylinder 7 above the throttle portion 15,
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. Reference numeral 19 denotes a top frame, which is placed on the upper end of the red heat section 16 so as to shield the upper end of the air passage 20 between the red heat section 16 and the transmission tube 18, and fixes the transmission tube 18. Reference numeral 21 denotes a flow control tube installed inside the inner flame tube 6 and extends upward from the vicinity of the position facing the tip of the wick 1 to near the tip of the inner flame tube 6 and is formed between the inner flame tubes 6 Is provided so as to substantially shield the bottom surface thereof. 23 is an air introduction path. 24 is a combustion control tube,
The outer flame cylinder pore portion 25 is set inward and upward, and the upper end extends to the vicinity of a position facing the throttle portion 15 of the outer cylinder 9, and an air chamber 26 is formed between the outer flame cylinder pore portion 25 and the pore portion 25. 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. 29 is a control area just above the vent hole 28
A shielding portion that divides 22 into a lower control region 30 and an upper control region 31, and is formed by projecting the control cylinder 21 in the outer peripheral direction by applying a beading process, a flare process, or the like. 32 is a ventilation part that is set so as to have a constant space between the flow restricting cylinder 21 and the inner flame cylinder top plate 12, 33 is a square hole provided above the red heat part 16 of the outer flame cylinder 7, and 34 is a restrictor. The non-perforated portion provided in the inner flame tube 6 at the portion of the flow tube 21 facing the upper and lower flow control areas 30, 31 has the above-mentioned upper and lower flow control areas 30, 3
The air hole 11 of the inner flame cylinder portion facing 1 is divided into upper and lower parts.

In the above configuration, when the wick 1 is ignited, combustion starts, and a high temperature combustion gas due to combustion rises in the combustion chamber 8 to generate a thermal draft, and the air required for combustion is the air in the inner flame cylinder 6 and the outer flame cylinder 7. Combustion chamber 8 through hole 11 and through hole 17 of red heat section 16
It is supplied inside and combustion is continued. 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 basin 30 and the upper control basin 31 have a negative pressure, a part of the mixed gas flows into the lower control basin 30 and the upper control basin 31. However, this unburned gas flows from the communication hole 28 and the ventilation part 32 to the respective flow control areas 30, 31.
It is mixed with the air stream flowing in and fed back into 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 lowered to reduce the combustion amount, the flame gradually descends into the combustion chamber 8. The flow in this case is the same as that in the strong combustion, but the amount of vaporized gas is greatly reduced, so that the amount of unburned gas flowing into the upper control region 31 is also reduced. Therefore, the vicinity of the region B becomes a good mixing region, flame holding is formed in this region, the wall surface of the inner flame cylinder 6 is red-heated, and combustion is completed by the flame formed above it. 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.
However, there is almost no unburned gas component, the air discharged from the air holes 11 and the ventilation holes 13 above the flame 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.

Here, since unburned gas and air flow into each of the control regions 30 and 31, and they mix and flow out to the combustion chamber 8, a complicated flow is generated, and collision and turbulence of the gas flow are likely to occur. Become. However, in this combustion device,
The air hole 11 of the inner flame cylinder 6 at the portion facing 0, 31
Since it is divided into upper and lower parts, the inflow and outflow of unburned gas can be clearly understood. Therefore, the flow of the gas in each of the restriction regions 30 and 31 becomes relatively stable, and the flame in the portion facing the restriction regions 30 and 31 does not fluctuate or blow off. The non-perforated portion 34 may be provided in each of the upper and lower control regions 30, 31, but in the lower control region 30 having a short vertical interval, the vertical interval is short and the presence of the air flow flowing from the communication hole 28 inevitably causes gas flow. The flow becomes relatively stable. Therefore, it is not always necessary to provide the non-perforated portion 34 in the restricted region having a short vertical interval.

In this embodiment, since the combustion control cylinder 24 is provided 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 divided into the air from the air hole 11 of the outer flame cylinder 7 and the air from the through hole 17 of the red heat part 16 by the throttle portion 15 at the upper end of the outer cylinder 9 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 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 ventilation hole 28, combustion is promoted there and the oxygen deficiency characteristic is improved.

EFFECTS OF THE INVENTION As is clear from the description of the embodiments above, according to the combustion apparatus of the present invention, the adjustment range of the combustion amount is widened, and stable combustion without combustion noise or flame sway is obtained.

[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 cylinder, 7 ... outer flame cylinder, 8 ... combustion chamber, 9 ... outer cylinder, 11 ... air hole, 18 ... transmission cylinder, 21 ...
Restricted flow cylinder, 22 ... Restricted flow area, 34 ... Non-perforated part.

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 transmission cylinder mounted above the outer cylinder, and a vertically movable set at a lower end of a combustion chamber formed between the outer flame cylinder and the inner flame cylinder. The inner flame tube extends in the vicinity of a position facing the light core to a vicinity of an upper end of the inner flame tube, and a restricted region formed between the inner flame tube and the inner flame tube is substantially formed on the bottom surface. Combustion device with a flow restricting cylinder that shields the air, and the air holes in the inner flame cylinder that face the flow restricting area of the restrictor cylinder are divided into upper and lower parts with a non-perforated part in between.