JPH0772607B2 - 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 device, there is a wick type combustion device used for an oil stove or the like. Unlike the oil fan heater, this wick type combustion device does not require a 100V power source, that is, it does not require a power cord, so it has the advantage of being easy to carry, but when the amount of combustion is reduced slightly, a large amount of CO begins 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. 3 which allows a wide range of adjustment of the combustion amount. Explaining this combustion device below,
In FIGS. 3 and 4, 1 is a wick, which is set between the inner core tube 2 and the outer core tube 3 so as to be vertically movable. Inner core 2
The inner and outer flame trays 5 and 5 are formed at the upper ends of the core outer cylinder 3 and the inner flame cylinder 6 and the outer flame cylinder 7, respectively. 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 fuel 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 a vent hole 13 that communicates upward from the inside of the inner-flame cylinder 6
have. Reference numeral 14 is a flame spreading plate placed on the inner flame cylinder top plate 12. A throttle portion 15 is formed at the upper end of the outer portion 9, and a red heat portion 16 is formed in the outer flame tube 7 above the throttle portion 15 and 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 at the bottom of the collar. 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 in the lower wall surface of the flow control cylinder 21. Reference numeral 29 denotes a collar 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 applies the beading process or the flare process to project the control cylinder 21 in the outer peripheral direction. Is formed by. Reference numeral 32 is a ventilation part which is set so as to have a constant space between the flow restricting cylinder 21 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 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 ventilation hole 28 and the ventilation portion 32, 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 near the upper end of the combustion chamber 8, so that they are efficiently burned near the area A, and the unburned gas that has not been burned is burned. The gas is combusted with a 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 area B
The vicinity is a good mixing region, and flame holding is formed in this part, the wall surface of the inner flame tube 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 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. Therefore, the combustion amount can be narrowed down to a considerably low place, and the combustion amount adjustment range becomes wide.

Further, even during ignition, air is efficiently supplied from the communication hole 27 and the ventilation hole 28 to the lower side of the combustion chamber 8, so that rapid combustion is promoted and the generation of CO odor is small. 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-described configuration, although the adjustment range of the combustion amount is wide, the adjustment of the combustion amount is performed by the height exposed in the combustion chamber 8 of the wick 1. When the exposure height is high, the combustion amount is large, and when the exposure height is low, the combustion amount is small.
Therefore, for example, when the combustion amount is suddenly changed from the minimum position to the maximum position of the adjustment range, the exposed height of the wick 1 suddenly changes and the vaporization amount of the fuel sharply increases, so that an excessive flame is generated above the combustion chamber 8. It may occur, the flame may extend beyond the exterior top plate, and the flame may protrude outside the upper part of the front of the equipment, and at the same time it becomes lift flame due to insufficient mixing, and CO, odor and soot are generated,
In use, there was a problem in terms of safety and comfort such as burns and fire. Further, although the above configuration allows a wide range of adjustment of the combustion amount, there is a problem that the above-mentioned excessive flame is a constraint and the entire range of the wide range of combustion amount cannot be utilized in practice. there were.

The present invention solves such a conventional problem, while suppressing an excessive flame that occurs when the small combustion amount of the combustion amount adjustment range is suddenly changed to a large combustion amount, and prevents the generation of CO, odor and soot. It is an object of the present invention to provide a safe and comfortable combustion device with a wide adjustment range of the combustion amount.

Means for Solving the Problems In order to solve the above problems, the combustion device of the present invention is disposed inside the inner flame tube, and a flow restricting tube that forms a flow restricting region with the inner flame tube. , The collar part that is installed laterally in the flow control area between this control tube and the inner flame tube, and inside the pores of the outer flame tube, and from below the red heat part of the outer flame tube from near the upper part of the wick. A combustion control tube that extends to a position and forms an air chamber between the outer flame tube and the pores of the outer flame tube, is located above the upper end of the inner flame tube, and is gear-shaped from the upper part of the outer flame tube toward the inner flame tube. Is provided with a protrusion.

Effect of the Invention With the above configuration, when the combustion amount suddenly changes from the small combustion amount to the large combustion amount, the fuel vaporization amount rapidly increases and the unburned gas rises in the combustion chamber and reaches the upper portion of the combustion chamber. However, the flow is disturbed by the gear-shaped protrusions provided so as to contact the unburned gas layer rising in the combustion chamber in the upper part of the outer flame, and the flame is subdivided by the gear-shaped protrusions. The diffusion area with air is increased and the flame is shortened, and it is possible to significantly suppress the excessive flame. Also, by promoting mixing, the lift of the flame can be prevented and CO, odor and soot can be prevented. Further, since the position of the protrusion is provided above the upper end of the inner flame cylinder, it is possible to avoid a problem caused by an increase in ventilation resistance above the combustion chamber. Also, since the ventilation hole provided in the inner flame tube top plate is on the upstream side of the protruding portion, the air supplied from the ventilation hole is also affected by the protruding portion, and as the amount of air increases, Since the mixed state becomes good, the above-mentioned action is promoted.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. The same parts as those of FIG. 3 already described are given the same reference numerals, and the description thereof will be omitted. Only different parts will be described.
In FIGS. 1 and 2, a gear-shaped protrusion 33 is provided above the upper end of the inner flame cylinder 6 and extends from the upper portion of the outer flame cylinder 7 toward the inner flame cylinder 6.

In the above structure, combustion is performed in the same manner as that shown in FIG. 3 described above, but when the amount of combustion is suddenly changed from a small amount of combustion to a large amount of combustion, the amount of fuel vaporization is suddenly increased. Although the unburned gas increases and reaches the upper portion of the combustion chamber 8, the unburned gas is increased by the gear-shaped protrusion 33 provided so as to contact the unburned gas layer rising in the combustion chamber 8 at the upper portion of the outer flame cylinder 7. And the flow of air is disturbed to promote mixing, and the flame is subdivided by the gear-shaped protrusions 33 to increase the diffusion area with air and shorten the flame, resulting in significant suppression of excessive flames. Became possible. Also, since the flame lift can be prevented by promoting the mixing, no CO, odor or soot is generated. If the gear-shaped protrusion 33 is provided at the same position as or below the upper end of the inner flame cylinder 6, the gap above the combustion chamber 8 formed between the protrusion 33 and the inner flame cylinder 6 is reduced. Although the ventilation resistance above the combustion chamber 8 is increased and a problem such as a decrease in the rated combustion amount occurs, in the embodiment, since the position of the protruding portion 33 is provided above the upper end of the inner flame tube 6, the combustion chamber 8 There is no increase in ventilation resistance in the upper part, and problems such as a decrease in the rated combustion amount can be avoided. Further, since the ventilation hole 13 provided in the inner flame tube top plate 12 is on the upstream side of the protruding portion 33, the air supplied from the ventilation hole 13 is also affected by the protruding portion 33, and the amount of air from the ventilation hole 13 is increased. As the mixed state with the unburned gas becomes good under the increase of the above, the above-mentioned action and effect are promoted. Therefore, the adjustment range of the combustion amount, which was restricted by the excessive flame generated when the small combustion amount suddenly changes to the large combustion amount, can be used in a wider range.

In the above embodiment, the case where the gear-shaped protrusion 33 is integrated with the top frame 19 is described, but the same effect can be obtained even if the configuration of another component is adopted.

Effects of the Invention As described above, the combustion device of the present invention has the following effects.

When the amount of combustion is suddenly changed from a small amount of combustion to a large amount of combustion, 1) The unburned gas and air flows are disturbed by the gear-shaped protrusions provided on the upper part of the outer flame tube, and mixing is promoted. The flame is subdivided by the protrusions, the diffusion area with the air is increased, the flame is shortened, and it is possible to significantly suppress the excessive flame. Therefore, it is excellent in safety without burns or flames.

2) The flame lift can be prevented by promoting the mixing of unburned gas and air, so no CO, odor or soot is generated.
It has excellent comfort.

3) Since the gear-shaped protrusion is provided above the upper end of the inner flame cylinder, the ventilation resistance does not increase, and problems such as a decrease in the rated combustion amount can be avoided.

4) Further, the air supplied from the ventilation hole provided in the inner flame cylinder top plate is also affected by the gear-shaped protrusion, so that the mixed state with unburned gas may increase as the amount of air from the ventilation hole increases. Since it becomes good, the effects of 1) and 2) above are promoted.

5) Due to the above effect, the adjustment range of the combustion amount, which was restricted by the excessive flame, can be used in a wider range.

Due to the above effects, the large flame that occurs when the combustion amount is suddenly changed from a small combustion amount to a large combustion amount is greatly suppressed, and the generation of CO, odor and soot is prevented, and a safe and comfortable combustion amount is achieved. A combustion device with a wide adjustment range can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a main section of the combustion apparatus, and FIG. The figure is a perspective view of a main part of the combustion apparatus. 1 ... wick, 6 ... inner flame cylinder, 7 ... outer flame cylinder, 8 ... combustion chamber, 9 ... outer cylinder, 11 ... air hole, 16 ... red heat part, 18 ...
Transmission tube, 25 ... Pores, 33 ... Protrusions.

Front Page Continuation (72) Inventor Akio Taki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Satoru Nitta 1006 Kadoma, Kadoma City Osaka Prefecture (72) ) Inventor Kazuto Nakatani 1006, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP 62-218703 (JP, A) JP 63-49606 (JP, A) 59-163710 (JP, U)

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. A wick and a flow control tube that is disposed inside the internal flame tube and forms a flow control area between the internal flame tube and the internal flame tube; and a flow control area between the flow tube and the internal flame tube. Between the laterally provided flange portion and the inside of the pore portion of the outer flame tube, extending from above the wick to a position below the red heat portion of the outer flame tube, and forming a pore portion of the outer flame tube. A combustion device, comprising: a combustion control tube that forms an air chamber therebetween; a combustion control tube that is located above the upper end of the inner flame tube and that has a gear-shaped protrusion from the upper part of the outer flame tube toward the inner flame tube.