JPH0672685B2 - 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 combustion device 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, if the amount of combustion is reduced slightly, a large amount of CO will start to burn. 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. 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 is a top frame, which is an 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 that the bottom surface thereof is shielded. 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.

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 inside of the inner flame cylinder 6 is divided into the air supplied from below the flow restricting cylinder 21 to the vicinity of the wick 1 and the flow of air rising in the air introduction passage 28. 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. 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 reduced 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 vaporized gas Is significantly reduced, 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 to 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 air holes 13 above the flame is clean, and the exhaust gas characteristics (CO / CO ₂ ) do not deteriorate.

Further, the air from the outside is divided into air from the air hole 11 of the outer flame cylinder 7 and the through hole 17 of the red heat part 16 at the throttle portion 15 at the upper end of the outer cylinder 9 and is 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 in the portion facing the throttle section 15 is an air passage. A phenomenon of leaking to 20 occurred, and a part of the phenomenon was directly discharged from the upper part of the through hole 17 of the red heat section 16, so that CO / CO ₂ was deteriorated at the time of low combustion. The combustion control cylinder 24 is provided for this purpose, and the air from the outer flame cylinder vaporization unit 25 locally burns the unburned gas in the air chamber 26 to reduce the leakage amount of the unburned gas and to prevent leakage. The combustion gas is drawn into the combustion chamber 8 by the draft in the combustion chamber as shown by the black arrow C so that it burns and causes the air flow along the outer flame cylinder 7 to reduce the deterioration of CO / CO ₂ by half. There is.

Therefore, the amount of combustion can be reduced to a very low place,
The combustion adjustment range is 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 little generated. Also, the same effect can be obtained when the material is burned for a long time in a well-sealed room. That is, under the oxygen deficient state, the combustion amount decreases as the oxygen concentration decreases, and a phenomenon similar to that in the case where the exposure height of the wick 1 is decreased to decrease the combustion amount is generally observed. Since air is supplied to the combustion chamber 8 from the pores 28, combustion is promoted there and the oxygen deficiency characteristic is improved.

Problems to be Solved by the Invention However, in the above configuration, the pores 25 of the outer flame cylinder 7, the through holes 17 of the red heat part 16, and the flames formed at the upper end of the combustion control cylinder 24 attract each other. As a result, flame-blowing phenomenon occurs and flame-holding becomes very unstable, and there are practical problems such as pulsation noise during combustion and flame swaying. This phenomenon changes the isothermal draft when switching from low combustion to high combustion,
This was especially likely to occur when the flow velocity changed or when there was external air flow such as wind, and it continued as it was.

The present invention solves the problems of the prior art, by preventing the noise and flame sway when switching from low combustion to high combustion or wind blowing, the combustion characteristics are good and the combustion amount adjustment range is large. The purpose of the present invention is to provide a safe and comfortable combustor that is practically problem-free.

Means for Solving the Problems In order to solve the above problems, in the combustion device of the present invention, a portion of the outer flame tube red heat section facing the outer tube throttle section is made a non-hole portion and the outer flame tube red heat section maximum The upper end of the combustion control cylinder is extended to the lower end of the lower through hole.

Action The present invention has the above-described configuration, and the pores of the outer flame cylinder, the through holes of the red heat portion, and the flame holding formed at the upper end of the combustion control cylinder do not attract each other. The flame resistance formed at the upper end of the combustion control cylinder becomes stable due to the flow resistance of the passage formed by the non-perforated portion and the combustion control cylinder extension, so that the combustion noise and the fluctuation of the flame do not occur, and the combustion Can be done.

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 will be denoted by the same reference numerals and description thereof will be omitted, and only different parts will be described.
The through-hole portion of the red-heated portion 16 of the outer flame cylinder 7 facing the narrowed portion 15 of the outer cylinder 9 is a non-hole portion 34. Further, the combustion control cylinder 24 has its upper end extended to the lower end of the lowermost through hole 17 provided in the red heat cylinder 16.

In the above structure, the combustion is performed in the same manner as in FIG. 2 described above, but the lowermost through-hole portion of the red heat section 16 of the outer flame cylinder 7 becomes a non-hole portion, and the outer flame cylinder pores are The distance between the portion 25 and the communication hole 27 of the combustion control cylinder 24 and the lowermost stage of the through hole 17 becomes longer, and flame holding formed in both of them does not attract each other.

Further, since the upper end of the combustion control tube 24 is extended to the lowest stage of the through hole 17 of the external flame tube red heat section 16, the upper end portion of the combustion control tube 24 and the non-hole portion 34 of the external flame tube red heat section 16 are connected. A passage portion is formed in the air chamber, and the flow resistance of the passage portion causes the air chamber
As the rising speed of the unburned gas from 26 is reduced, the amount of air entering the air chamber 26 from the outer flame tube pore portion 25 can be suppressed. Therefore, the flame holding formed on the upper end of the combustion control cylinder 24 becomes stable, and the influence of changes in draft force and wind contact becomes extremely small, and combustion noise and flame fluctuations are eliminated.

EFFECTS OF THE INVENTION As described above, according to the combustion apparatus of the present invention, the combustion amount adjustment range is widened, and the combustion noise and the flame are not shaken. Therefore, the combustion amount adjustment range is large and safe and practically comfortable. A combustion device can be 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 ...
Control cylinder, 22 ... Control area, 24 ... Combustion control cylinder, 25 ... Pore, 26 ... Air chamber, 27 ... Communication hole, 28 ... Vent hole, 29 ...
… Shielding part, 33 …… Inner flame tube pore, 34 …… Non-hole part.

 ─────────────────────────────────────────────────── ─── 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.

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 wick to a vicinity of the upper end of the inner flame tube, and a low surface shields the restricted region formed between the wick and the inner flame tube. A flow control cylinder, a combustion control cylinder that is arranged above the inside of the pores of the external flame cylinder and forms an air chamber between the pores, and a communication hole provided in the wall surface of the combustion control cylinder. , And a portion of the red flame portion of the outer flame tube that faces the upper throttle portion of the outer flame is a non-hole portion. Combustion apparatus comprising stretching the upper end of the control cylinder.