JPH0745926B2 - 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 the wick 54 is exposed in the combustion chamber 53 between the inner flame cylinder 51 having a large number of air holes and the outer flame cylinder 52 to vaporize and burn the fuel. And the normal flame 52
Above the narrowed portion 55a of the outer cylinder 55 is a red heat portion 56 having a through hole 56a with a large opening area, which mixes with the air introduced into the combustion chamber 53 through the through hole 56a vaporized from the wick 54. The red heat part 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, gas leaks to the inside of the inner flame cylinder 51, and when the combustion amount is reduced, it flows out as it is and the CO amount increases, which is why However, the combustion amount adjustment range could not be widened.

The present invention has been made in view of such a point, and aims to increase the red-hot brightness and suppress red-hot unevenness while reducing the amount of CO when the amount of combustion is reduced to widen the amount of combustion adjustment. It is a thing.

Means for Solving the Problems In order to achieve the above object, the combustion apparatus of the present invention has an outer flame cylinder including a pore portion having a large number of air holes and a red heat portion formed above the pore portion, and the outer flame cylinder. An inner flame cylinder having a large number of air holes arranged inward, an outer cylinder located outside the lower part of the outer flame cylinder, a permeation cylinder mounted above the outer cylinder, and the outer flame cylinder A wick, which is vertically movable at the lower end of the combustion chamber between the flame cylinders, is arranged inside the inner flame cylinder to form a restricted flow region between the inner flame cylinder, and the lower end faces the wick. A flow that is located near the position and whose upper end is an unburnt gas that has flowed out of the combustion chamber to the restricted region from flowing out from above the flame when the combustion is throttled, and is introduced again into the combustion chamber for combustion. A flow restricting cylinder extending to a position where a flow restriction occurs, and a suppressing portion suppressing the flow in the restrictive flow area between the restricting cylinder and the inner flame cylinder. A combustion control cylinder arranged inside the outer flame cylinder and forming air between the outer flame cylinder and the outer flame cylinder, and arranged inside the outer flame cylinder and between the outer flame cylinder and A combustion control cylinder forming an air chamber, the combustion control cylinder being provided in the vicinity of a constriction formed between the outer cylinder and the outer flame cylinder, and the auxiliary cylinder dividing the restriction region into the restriction cylinder. Vents are provided below the suppressing portion and the auxiliary suppressing portion so as to face the combustion control cylinder, and the plate thickness of the outer flame cylinder is thinner than that of the inner flame cylinder.

Operation With the above-described structure, the present invention concentrates the unburned gas leaking into the flow restricting region from the inner flame cylinder air hole near the upper end of the flow restricting cylinder while mixing it with the clean air supplied above the flow restricting cylinder. Can be supplied to the combustion chamber to accelerate combustion, and at the same time, the combustion control cylinder burns unburned gas that is about to leak to the outside of the outer flame cylinder from the portion facing the throttle portion, and also serves as an auxiliary suppressor. The ventilation hole promotes the combustion of the unburned gas that is about to leak from the inner flame cylinder portion facing the combustion control cylinder to the restricted flow area, so that the leakage of the unburned gas itself can be reduced and the combustion amount can be reduced. Even if you squeeze it, the amount of CO will be small.

Further, by promoting the combustion, the red glow brightness of the inner flame tube is also improved, and the red flame brightness of the outer flame tube is improved by the amount of the thin plate,
In addition to improving the red heat brightness of the combustion cylinder as a whole, it is possible to suppress the decrease in red heat caused by the small flame holding in the area immediately above the outer flame cylinder throttle part where unburned gas leakage is suppressed by the combustion control cylinder. The red glow brightness of the outer flame tube can be made substantially uniform.

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 substantially concentrically from the inside 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. The outer flame cylinder 7 is formed thinner than the inner flame cylinder 6. A transparent cylinder 18 made of a transparent material such as glass is placed on the outer cylinder 9. 19 is the top frame, the red heat part 16 and the transparent tube
It 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 18 and fixes the transmission tube 18. Reference numeral 21 is a flow restricting cylinder installed inside the inner flame cylinder 6, forming a restriction flow region 22 between the inner flame cylinder 6 and the inner flame cylinder 6, and the lower end is located above the vicinity of the position facing the tip of the wick 1, The upper end prevents unburned gas that has flowed out of the combustion chamber 8 into the restricted region 22 from flowing in from above the flame when the combustion is throttled, and is introduced into the combustion chamber 8 again to a position where a flow for combustion is generated. The extension is provided, and a suppressing portion 21a that suppresses the flow of the flow control region 22 formed between the inner flame cylinder 6 and the inner flame cylinder 6 is provided on the bottom surface thereof. Reference numeral 23 is an air introduction passage formed inside the flow control cylinder. Reference numeral 24 is a combustion control cylinder, and the outer flame cylinder pores 25
Is set to the inner upper part of the outer cylinder 9, and the upper end thereof extends to the vicinity of the position facing the narrowed portion 15 of the outer cylinder 9, and an air chamber 26 is formed between the air hole portion 25 and the air hole portion 25.

Reference numeral 27 is a communication hole provided on the wall surface of the combustion control cylinder 24, which is used for the air chamber.
26 and the combustion chamber 8 are communicated with each other in a large number. Reference numeral 29 denotes an auxiliary suppressing portion provided in the middle and lower parts of the flow restricting cylinder 21 facing the upper part of the combustion controlling cylinder 24, and by applying beading processing, flare processing or the like, the flow restricting cylinder 21 is projected in the outer peripheral direction. It is formed so as to divide the control region 22 into a lower control region 30 and an upper control region 31, and a ventilation hole 28 is provided in a portion directly below the control region 24 facing the combustion control cylinder 24. The air from the air introduction path 23 is made to flow into the upper part of the restricted area 30. Reference numeral 32 is a ventilation part that is set so as to have a constant space between the flow control cylinder 21 and the internal flame top plate 12.

In the above structure, when the wick 1 is ignited, combustion is started, and a high temperature combustion gas due to the combustion rises in the combustion chamber 8 to generate a thermal draft, and the air required for the 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 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 airflow coming from the ventilation hole 28 and the ventilation portion 32, and is again supplied to the combustion chamber. Therefore, at the time of strong combustion, the 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.
-Efficiently burns near B, and unburned gas that cannot be burned here is burned by the flame formed above.

Next, when the exposed height of the wick 1 is lowered to reduce the amount of combustion, the flame gradually falls 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 region B is a good mixed region,
Flame-holding is formed at this portion, 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. Therefore, there is almost no unburned gas component in the upper control region 31 that faces above the flame. 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.

Further, since the combustion cylinder of the present invention is provided with the combustion control cylinder 24 on the side of the outer flame cylinder 7, 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, the air holes in the outer flame cylinder 7
Flame holding is formed in the through holes 17 of the 11 and the red heat section 16,
A part of the unburned gas in the combustion chamber 8 leaks to the air passage 20 in the portion facing the throttle portion 15, though not to the extent of the inner flame side, and a part of the unburned gas in the through hole 17 of the red heat portion 16 Since it is directly emitted from the upper part, it deteriorates CO / CO ₂ at low combustion.
In order to reduce this, the above-mentioned combustion control tube 24 is provided, and the unburned gas that is about to leak by locally burning the unburned gas in the air chamber 26 by the air from the outer flame tube pores 25 Along with reducing the amount of combustion gas, the combustion gas that has burned in the air chamber 26 to become mostly CO ₂ and the air from the outer flame cylinder pores 25 that has not been used in this combustion run along the outer flame cylinder 7. The unburned gas rising from below is moved toward the inner flame cylinder 6 side, and the air passage is formed from the lower portion of the outer flame cylinder 7, that is, the portion facing the throttle portion 15 of the outer flame cylinder 7 and the portion immediately above.
Reduce unburned gas leakage to 20. That is, in the portion facing the narrowed portion 15 and the portion immediately above it, combustion progresses and most of the CO ₂ becomes a mixed gas of combustion gas and air, and there are few unburned gases.
Therefore, even if these leak, a small amount of unburned gas is contained therein, and the leaked small amount of unburned gas is drawn into the combustion chamber 8 by the draft in the combustion chamber and burned as indicated by a black arrow c. Like

Further, since the combustion control tube 24 is provided in the outer flame tube 7, this portion, that is, the combustion chamber between the combustion control section 24 and the inner flame tube 6 is narrowed, so that unburned gas rising in this portion is not burned. As mentioned above, especially the inner flame cylinder 6 is closer to the lower control basin
It becomes easy to leak into the combustion chamber 30, but as shown by the white arrow, air enters into the combustion chamber together with the unburned gas which is about to leak out from the vent hole 28 provided directly below the auxiliary suppression unit 29 and is not supplied to the combustion chamber. The combustion of the fuel gas is promoted, and the leak amount of the unburned gas in this portion can be reduced. Therefore, due to the synergistic effect of these, the combustion amount can be narrowed down to a much lower place, and the combustion adjustment range becomes wide.

Further, in this combustion device, as described above, the combustion in the inner flame cylinder 6 is promoted, so that the red heat brightness of the inner flame cylinder 6 is improved as compared with the conventional one. Along with this, the heat capacity of the outer flame cylinder 7 side is also reduced by the amount of reduction in the plate thickness, and the red glow brightness is improved. That is, the outer flame cylinder 7 does not cancel out the increase in the red heat brightness of the inner flame cylinder 6. Therefore, it is possible to fully utilize the increase in the red heat brightness of the inner flame cylinder 6 as it is and improve the red heat brightness of the entire combustion cylinder.

On the other hand, although there is combustion in the air chamber 26 in the portion of the outer flame cylinder 7 that faces the throttle portion 15 and the portion directly above it, combustion in this portion is large because combustion gas and air are large and the amount of unburned gas is very small. The flame is small. Therefore, there is a tendency that the red hot brightness is lowered in the portion facing the narrowed portion 15 and the portion directly above it, and the lower portion of the red flame portion 16 of the outer flame becomes dark.
However, since the outer flame tube 7 has a thin plate thickness, the portion facing the constricted portion 15 and the portion directly above it also become red hot enough, and as a result, the red hot portion 16 has a substantially uniform red hot brightness without red hot spots. Will be things.

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.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, the combustion device of the present invention has the following effects.

A. The unburned gas that has leaked from the combustion chamber to the flow control area between the inner flame cylinder and the flow control cylinder is mixed with clean air and supplied to the combustion chamber for combustion, resulting in a significant reduction in CO amount, The adjustment range of the combustion amount becomes wider.

B. The air between the combustion control cylinder and the outer flame cylinder burns unburned gas that tries to leak out of the outer flame cylinder from the portion facing the throttle, and the combustion is performed by the auxiliary suppression unit and the vent hole. Combustion of unburned gas that is about to leak from the inner flame cylinder facing the control cylinder to the restricted area can be promoted, and the leakage of unburned gas itself can be reduced. Becomes smaller, and the combustion amount adjustment range further expands accordingly.

C. Combustion of unburned gas that leaks into the restricted area inside the inner flame cylinder improves the red glow brightness of the inner flame barrel, and the outer flame barrel also has a smaller red thickness, which improves the red glow brightness. The overall red hot brightness is improved.

D. Leakage of unburned gas is suppressed by the provision of the combustion control cylinder.It is possible to suppress the decrease in red heat caused by the small flame holding in the area immediately above the throttle section of the outer flame cylinder. The uneven brightness can be eliminated by making the brightness almost uniform.

[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, 15 ... throttle part, 18 ...
Permeation cylinder, 21 …… Flow control cylinder, 21a …… Suppression section, 29 …… Auxiliary suppression section, 22 …… Flow control area.

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 located outside the lower part of the outer flame cylinder, a transparent cylinder mounted above the outer cylinder, and a wick vertically set at the lower end of the combustion chamber between the outer flame cylinder and the inner flame cylinder. , A restriction region is formed between the internal flame cylinder and the internal flame cylinder disposed inside the internal flame cylinder, the lower end is located above the vicinity of the position facing the wick, and the upper end flows out of the combustion chamber into the restrictive flow region. The gas that has already been restrained from flowing out from above the flame when the combustion is throttled, is introduced again into the combustion chamber and is extended to a position where a flow for combustion is generated; A suppression unit that suppresses the flow in the restricted region between the inner flame tube and the inner flame tube is disposed inside the outer flame tube, and an air chamber is formed between the suppression section and the outer flame tube. A combustion control cylinder is provided, the combustion control cylinder is provided in the vicinity of a throttle portion formed between the outer cylinder and the outer flame cylinder, and an auxiliary suppression unit that divides the restriction region and the auxiliary is provided in the restriction cylinder. A combustion device in which a vent hole is provided below the suppressing portion and at a position facing the combustion control cylinder, and the plate thickness of the outer flame cylinder is thinner than the plate thickness of the inner flame cylinder.