JPH06105121B2 - 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 wick type combustion apparatus used in oil stoves and the like. Unlike the oil fan heater, this wick-type combustor does not require a 100V power supply, that is, it does not require a power cord, so it has the advantage of being easy to carry, but on the other hand, a small amount of CO will start to be generated and combustion will start. There was a problem that the amount adjustment range was narrow.

As a solution to such a problem, the applicant has already proposed a combustion device as shown in FIG. 2 that allows a wide range of combustion amount adjustment. Explaining this combustion device below,
In FIG. 2, 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. The upper ends of the inner core tube 2 and the outer core tube 3 form an inner fire tray 4 and an outer fire tray 5, respectively.
An inner flame cylinder 6 and an outer flame cylinder 7 are placed. The tip of the wick 1 is a combustion chamber 8 formed between the inner flame cylinder 6 and the outer flame cylinder 7 during combustion.
It is exposed inside, where combustion vaporization takes place. 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. 11
Are air holes provided in a large number 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 the throttle portion 15 is further formed.
The red flame portion 16 is formed in the outer flame cylinder 7 above 15 and the 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 the top frame and is the air passage between the red heat section 16 and the transparent tube 18.
It is placed on the upper end of the red heat section 16 so as to shield the upper end of 20,
The transparent tube 18 is fixed. 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. 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. 28 is a ventilation hole provided on the lower wall surface inside the flow control cylinder 21. Reference numeral 29 is a shielding portion that divides the control region 22 into a lower control region 30 and an upper control region 31 directly above the ventilation hole 28, and uses the beading process or flare process to project the control 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.

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 rising air passes through the ventilation hole 28 and is supplied to the combustion 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. Therefore, the lower control region 30 and the upper control region 31 are filled with unburned gas. This unburned gas is mixed with the air flow in the communication hole 28 and the ventilation part 32, 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 the combustion cannot be completed 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 that 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 air 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 place, 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.
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. 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.

Problems to be Solved by the Invention However, in the above-mentioned configuration, when the wick height is rapidly increased to switch to high combustion from low combustion with low wick height, the vicinity of the wick 1 is reduced with low combustion. Since the temperatures of the inner and outer fire trays 4 and 5 are rising, the amount of vaporization is higher than that during steady high combustion.
The amount of air could not be tracked, and the flame spread from the upper part of the combustion cylinder, giving a sense of danger, and generating an offensive odor due to incomplete combustion.

The present invention solves the above-mentioned conventional problems by reducing the spread of flame at the time of rapid switching from low combustion to high combustion,
It is an object of the present invention to provide a comfortable and safe combustion device which has good combustion characteristics, a wide range of adjustment of the amount of combustion, and is safe and practically problem-free by preventing the generation of malodor.

Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention, a square hole is provided in the upper portion of the red flame portion of the outer flame tube, and a dense air collecting hole is formed in the inner flame tube of the portion facing the lower portion of the square hole. Is provided and the upper part thereof is made non-perforated.

Effect The present invention, with the above-described configuration, can send a large amount of air from the upper part of the combustion cylinder to a large amount of vaporization at the time of rapid switching from low combustion to high combustion, thus reducing the spread of flame. It is possible to prevent the generation of a bad odor due to incomplete combustion.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. However, the same parts as those in FIG. 2 already described are denoted by the same reference numerals, and the description thereof will be omitted. The red heat portion 16 of the flame tube 7 has a through hole provided in the upper portion thereof under the red heat portion 16. Square hole much larger than the through hole 17
It is as 33. Further, in the inner flame tube 6, the air holes 11 in the portion facing the lower half of the square hole 33 are densely packed to form a dense air hole 34,
The upper part is a non-perforated part 35.

In the above structure, steady combustion is performed in the same manner as in FIG. 2 described above, but at the time of rapid switching from low combustion to high combustion, a large opening angle is obtained for a large amount of vaporization. A large amount of air is sent through the holes 33 to reduce the spread of flame and prevent the generation of malodor due to incomplete combustion.

On the other hand, the provision of the square holes 33 cuts the red-heated portion 16, which makes it difficult to hold the flame and makes the upper portion of the inner flame tube 6 which is hard to red-heat look black, and the appearance tends to deteriorate. However, in this combustion cylinder, a dense air hole 34 is provided in a portion of the inner flame cylinder 6 facing the lower half portion of the square hole 33 to strongly hold the flame in this portion and improve the red glow brightness. It looks the same as the tube glowing part 16. Where the dense air holes 34
If the opening is too large, the air from the ventilation hole 13 of the inner flame tube top plate 12 to the upper part will be insufficient and incomplete combustion will occur at the upper part, so the dense air holes 35 will be two steps and the upper part will be a non-hole part 35. is there.

The square hole 33 may be a round hole, but if a certain opening area is to be secured, the opening must be enlarged to the lower part, so the square hole is preferable at the time of commercialization.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, according to the combustion apparatus of the present invention, not only the adjustment range of the combustion amount is widened, but also the flame is expanded even when the low combustion is rapidly switched to the high combustion. It is possible to obtain a safe and practically comfortable combustion device having a large combustion amount adjustment range by preventing the generation of a bad odor due to incomplete combustion.

[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 ...
Restriction cylinder, 22 ... Restricted area, 28 ... Ventilation hole, 29 ... Shield,
33 …… Square hole, 34 …… Dense air hole, 35 …… No hole.

 ─────────────────────────────────────────────────── ─── 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-62-108909 (JP, A) JP-A-62-223511 (JP, A) JP-A-63-49606 (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 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 wick and the inner flame tube extending in the vicinity of the inner flame tube from a position facing the light tube to the vicinity of the upper end of the inner flame tube, and a low surface shields the restricted area formed between the inner wick and the inner flame tube. And a square hole is provided in the upper part of the red flame part of the outer flame cylinder, and a dense air hole is provided in the inner flame cylinder at a portion facing the lower part of the square hole, and the upper part thereof is a non-hole portion. Combustion device.