JP2543096B2 - 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 a combustion device of this type, there is a suction vaporization type combustion device used in oil stoves and the like, and as shown in FIG. 3, this is an internal flame cylinder having a large number of air holes. The tip of a wick 54, which is a fuel supply unit, is exposed in a combustion chamber 53 formed between the 51 and the outer flame cylinder 52 so that the fuel is vaporized and burned. The normal outer flame cylinder 52 forms a red heating portion 56 having a through hole with a large opening area above the narrowed portion 55a of the outer cylinder 55, and the fuel vaporized from the wick 54 and the through hole form the combustion chamber.
The air introduced into 53 was mixed and burned, and the red heat 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. 3, solid arrows indicate the flow of air, and broken arrows indicate 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 this reduces the combustion amount, it flows out upward as it is and the CO amount increases, which is why It was not possible to widen the range of adjusting the combustion amount.

The present invention has been made in view of such a point, and reduces the amount of CO when the combustion amount is reduced to widen the combustion amount adjustment range, and the generation of combustion noise during maximum combustion or wind blowing. The purpose is to prevent the shaking of the flame.

Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention,
Inside the inner flame cylinder, a restriction region is formed between the inner flame cylinder and the inner flame cylinder,
The lower end is located above the position facing the wick, and the upper end suppresses the unburned 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 returns to the combustion chamber again. A flow restricting cylinder extending to a position where a flow is introduced and burned, and in order to suppress the flow in the restriction flow region between the restricting cylinder and the internal flame cylinder, the restricting cylinder is horizontally attached to the bottom surface of the restricting cylinder. A first restraint portion that projects in the direction, a non-hole portion is formed in the inner flame cylinder facing the first restraint portion, and the restraint portion above the first restraint portion of the restraint cylinder is further formed. Ventilation holes are provided at least at one or more places on the wall surface of the flow tube, and a second suppressing portion protruding from the flow control tube toward the inner flame tube side is provided immediately above the vent hole, and the second suppression is provided. A non-hole portion is formed in the inner flame cylinder portion facing the portion.

Effect The present invention has the above-described configuration and introduces unburned gas into the restricted flow region formed between the inner flame cylinder and the restricted flow cylinder, and the unburned gas is supplied by the clean air supplied above the restricted flow cylinder. While mixing, it is intensively supplied to the combustion chamber from the inner flame cylinder air hole near the upper end of the flow control cylinder to promote combustion. Since the control region is divided by the first and second suppression parts, the combustion gas flowing into the control region above the flame becomes a gas in which combustion has progressed considerably,
A large amount of CO can be prevented. Further, since the non-perforated portion is formed in the inner flame cylinder at the portion facing the first and second suppressing portions, it is possible to smoothly flow the unburned gas from the combustion chamber to the restricted flow area. As a result, the flame holding formed in the inner flame cylinder becomes stable, and the sound during combustion and the disturbance of the flame are reduced.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a wick, which is set between a core inner cylinder 2 and a core outer cylinder 3 so as to be vertically movable. Inner core 2 and outer core 3
The upper end portions of the two forms an inner flame tray 4 and an outer flame tray 5, respectively, on which an inner flame cylinder 6 and an outer flame cylinder 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 an opening 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 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. Reference numeral 18 denotes a transparent cylinder made of a transparent material such as glass, which is placed on the outer flame 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 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, and the unburned gas flowing from the combustion chamber 8 into the restriction flow region 22 is burned at the upper end. It is arranged to suppress the inflow of the flame from above when it is throttled, and to extend it to a position where a flow for introducing it into the combustion chamber 8 again for combustion is generated. In order to suppress the flow of the flow control area 22 formed between the flow control cylinders 21 at the bottom surface thereof, the first control portion 21a that extends horizontally from the flow control cylinder 21 has a beading process or a flare process. And so on. The inner flame cylinder 6 in the portion facing the first suppressing portion 21a is a non-hole portion 6a. Further, ventilation holes 23 are provided at least at one or more places on the wall surface of the flow control cylinder 21 above the first suppressing portion 21a of the flow regulation cylinder 21, and a plurality of the flow regulation areas 22 are provided directly above the ventilation holes 23. Divided into rectifying areas
The second suppressing portion 21b for suppressing the flow of 22 and the uppermost suppressing portion 21c having the same effect as the second suppressing portion are provided by beading processing, flare processing or the like as described above, and the second suppressing portion 21b, Similarly, non-perforated portions 6b and 6c are formed in the inner flame cylinder 6 in the portion facing the uppermost suppressing portion 21c. Among them, the uppermost suppressing portion 21c is provided above the throttle portion 15 of the outer cylinder 9 and below the central portion of the red heat portion 16 of the outer flame cylinder 7.
Reference numeral 24 denotes a combustion control cylinder, which is set in the upper inside of the outer flame cylinder pore portion 25 and 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 pore portion 25. ing. 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.

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 hole 17 of the red heat section 16 through the combustion chamber 8
It is supplied inside and combustion is continued. At this time, the air supplied from the inside of the inner flame cylinder 6 is divided into air supplied from below the flow restricting cylinder 21 to the vicinity of the wick 1 and air rising in the air introduction passage 28. A part of the raised air passes through the ventilation hole 23 and is supplied to the combustion chamber 8. Further, the air supplied above the inner flame cylinder 6 is supplied from the air holes 11 and the opening portions 13 to the combustion chamber 8 and above the combustion chamber 8. Further, part of the air flows into the upper control region 30 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 29 and the upper control region 30 are under negative pressure, a part of the mixed gas will be part of the lower control region 2.
9, it leaks into the upper control area 30. However, this unburned gas is mixed with the airflow flowing in from the ventilation hole 23 and the ventilation portion 31, and is again supplied to the combustion chamber. Therefore, at the time of strong combustion, unburned gas and air are mixed well from near the upper end of the inner flame cylinder 6 and supplied to the upper chamber of the combustion chamber 8, so that they are efficiently burned near the area A and cannot be burned further here. The unburned 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 similar to 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 30 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 30 is supplied to the combustion chamber 8 and burned by the flame, so there is almost no unburned gas component in the upper control region 30 that faces above the flame. The air discharged from the air holes 11 and the openings 13 above the flame are 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.

By the way, the flow of unburned gas and air in the lower control region 29 and the upper control region 30 is as shown in FIG. That is, below the lower control region 29 and the upper control region 30, a flow 32 in which a large amount of unburned gas flows from the air hole 11 of the inner flame cylinder 6 is generated. Also, above the lower control area 29, the air introduction path in the control tube 21.
Since the rising ventilation force of the combustion chamber 8 is higher than the rising ventilation force of 28 due to the provision of the flow restricting cylinder 21, the air flow from the air introduction passage 28 to the combustion chamber 8 through the ventilation hole 23. Is giving rise to 34. Therefore, in the upper part of the lower control region 29, a flow 35 in which a large amount of the mixed gas of the unburned gas 32 and the air flow 34 flows out from the air hole 11 of the inner flame cylinder 6 is generated contrary to the lower part. This also applies to the ventilation part 31. Therefore, the first suppressing unit 21
A non-perforated portion 6a is formed in the inner flame cylinder 6 at a portion facing the a, the second suppressing portion 21b, and the uppermost suppressing portion 21c so that the flows in the opposite directions can smoothly flow. That is, when there is an air hole in the inner flame cylinder 6 at the portion facing the first suppressing portion 21a, the second suppressing portion 21b, and the uppermost suppressing portion 21c, the flow of that portion is from the combustion chamber 8 to the restriction region 23. It is disturbed because it is not clear whether it will flow in or out. Therefore, in this portion, flame holding may or may not be formed, so that sound may be generated during combustion or the flame may become unstable when blown with wind. However, this can be prevented by providing the non-hole portion 6a as described above. In particular, the above-mentioned phenomenon is effective because it is remarkable at the time of maximum combustion with a large rising airflow. Further, since the flow restricting cylinder 21 of the embodiment shown in the present invention is held by the fixing pin 10, the oblique portion firmly holds the flame, and the opposite side does not hold the flame. However, even in such a case, the flame holding becomes stable.

Although the case where the flow restricting cylinder 21 has a plurality of stages has been described above, the same applies to the case where the flow restricting cylinder 21 has a single stage and the inner flame cylinder 6 facing the first suppressing portion 22a is provided with the non-hole portion 6a. .
Since the combustion device described in the above embodiment 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 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, the phenomenon of leakage into the air passage 20 occurred, and part of it leaked to the red heat part 16
As it is discharged from the upper part of the through hole 17 of
Makes CO / CO ₂ worse. In order to reduce this, the above-mentioned combustion control cylinder 24 is provided to locally burn unburned gas in the air chamber 26 by the air from the outer flame cylinder vaporizer 25 to reduce the amount of leakage of unburned gas. The amount of unburned gas that leaks is drawn into the combustion chamber 8 by a draft in the combustion chamber 8 as shown by a black arrow C so that the unburned gas is burned, and an air flow along the outer flame cylinder 7 is caused to cause CO / CO ₂ The deterioration of 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 from the communication hole 27 and the vent hole 23 to the lower side of the combustion chamber 8, 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 through the ventilation hole 23, combustion is promoted there and the oxygen deficiency characteristic is improved.

EFFECTS OF THE INVENTION As described above, according to the combustion apparatus of the present invention, the exhaust gas characteristics (CO / CO ₂ ) can be improved in a high combustion range, and the adjustment range of the combustion amount is widened. Since there is no hole in the inner flame cylinder of the part facing the first, second, and uppermost suppression parts of the flow restricting cylinder, there is no combustion noise or fluctuation of the flame, and the combustion amount adjustment range A large safe and practically comfortable combustion device can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a combustion apparatus showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the same main portion, and FIG. 3 is a cross-section of a combustion apparatus showing a conventional example. It is a figure. 1 ... wick, 6 ... inner flame cylinder, 6a, 6b, 6c ... non-hole portion, 7
…… Outer flame cylinder, 8 …… Combustion chamber, 9 …… Outer cylinder, 11 …… Air hole, 16 …… Red heat part, 18 …… Permeation cylinder, 21 …… Suppression cylinder, 21a
...... First restraint section, 21b ...... Second restraint section, 22 ...... Bounded area, 2
3 Vents.

 ─────────────────────────────────────────────────── ─── 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) Reference JP 62-108909 (JP, A) JP 63-49606 (JP, A) JP 63-201413 (JP, A) JP 63-223408 (JP, A)

Claims (1)

(57) [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. And the inner flame tube is provided inside the inner flame tube to form a restricted flow region, the lower end is located above the position facing the light core, and the upper end is located above the combustion chamber. Unburnt gas that has flowed out to the restricted flow region is suppressed from flowing out from above the flame when the combustion is throttled, and it is introduced again into the combustion chamber and a restricted flow pipe is extended to a position where a flow for combustion is generated. In order to suppress the flow in the flow control area between the flow control cylinder and the inner flame cylinder, a first suppression member horizontally projected on the bottom surface of the flow control cylinder. And a non-perforated portion is formed in the inner flame cylinder facing the first suppression portion, and at least one or more locations are provided on the wall surface of the restriction cylinder above the first suppression portion of the restriction cylinder. A vent hole is provided in the inner flame cylinder portion, and a second suppressing portion that projects from the flow restricting cylinder toward the inner flame cylinder side is provided immediately above the vent hole, and the inner flame cylinder portion that faces the second suppressor portion. A combustion device with a non-hole portion formed in the.