JPH01169217A - Combustion apparatus - Google Patents

Abstract

PURPOSE:To suppress burning with excessively high rising flames and prevent the generation of CO, offensive odor, and soot by positioning the periphery of a flame- diffusing plate, placed over an inner flame cylinder, outwardly of the combustion chamber and providing a flange installed at the periphery with a plurality of protrusions. CONSTITUTION:A quick switching of the combustion from low to high causes such a sharp increase in the amount of the fuel being gasified that some of the unburnt gas rises to the upper part of a combustion chamber 8. With such an occasion taken into account, there is provided a flame-diffusing plate 14 which extends outwardly of the combustion chamber 8 and in such a way as to certainly come in contact with the unburnt gas rising in the combustion chamber 8 toward its upper part; the flame- diffusing plate 14 has around its periphery 14a a flange which is turned downward and formed into a plurality of protrusions 14b so that the current of the unburnt gas and that of air both are agitated and mixed well by virtue of said protrusions. As a result, the phenomenon called a lift of flames is prevented and no CO, offensive odor, or sot arises out of the combustion. Since the flame is divided into small portions by contact with the protrusions 14b and thus gains in diffusion area in the air, the flame is made short and can thus be prevented from rising excessively.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a combustion device used for home heating and the like.

2. Description of the Related Art Conventionally, as this type of combustion device, there is a wick-type combustion device used in kerosene stoves and the like. This wick-type combustion device does not require a 100V power source like oil fan heaters, etc., which means it does not require a power cord, so it has the advantage of being easily portable, but on the other hand, if you reduce the amount of combustion a little, CO
There was a problem that a large amount of combustion started to occur and the range for adjusting the combustion amount was narrow.

As a solution to these problems, a combustion device as shown in FIG. 3 has been proposed which allows a wide combustion amount adjustment range.

This combustion device will be explained below.2 In Figures 3 and 4, 1 is a lamp wick, and the upper ends of the inner wick tube 2 and the outer wick tube a form an inner burner 4 and an outer burner 5, respectively. Flame cylinder 6. An outer flame tube 7 is placed. During combustion, the tip of the wick 1 is exposed in a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where the combustion is vaporized. 9 is the outer cylinder,
The inner flame tube 6, the outer flame tube 7, and the outer tube 9 are arranged approximately concentrically from the inside in order and are integrated by a fixing pin 10.

Reference numeral 11 indicates a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7. Reference numeral 12 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and has a ventilation hole 13 communicating upward from the inside of the inner flame tube 6. 14 is a flame expansion plate placed on the inner flame tube top plate 12, and its outer peripheral portion 14a faces the combustion chamber 8.

A constriction part 15 is formed at the upper end of the outer cylinder 9, and a red part 16 is formed in the outer flame cylinder 7 above the constriction part 15, and a large through hole 17 is provided. Reference numeral 18 denotes a transparent tube made of a transparent material such as glass, and is placed on the outer tube 9. A top frame 19 is placed on the upper end of the incandescent part 16 so as to cover the upper end of the air passage 20 between the incandescent part 16 and the transmission cylinder 18, and fixes the transmission cylinder 18. 2
Reference numeral 1 denotes a flow control tube installed inside the inner flame tube 6, which extends upward from near the position facing the tip of the wick 1 to near the tip of the inner flame tube 6, and has a control area 22 formed between the inner flame tubes 6. A flange is provided at the bottom of the holder. 23 is an air introduction path. 2
Reference numeral 4 denotes a combustion control cylinder, which is set at the upper part of the inner side of the hole-forming part 25 of the outer flame cylinder 7, and its upper end extends in the vicinity of a position facing the throttle part 15 of the outer cylinder 9.

An air chamber 26 is formed between the air hole portion 25 and the air chamber 26 .

27 is a communication hole provided in the wall of the combustion control cylinder 24.

A large number of them are uniformly provided so as to communicate the air chamber 26 and the combustion chamber 8. The second hole is a ventilation hole provided in the lower middle wall of the flow control tube 21. Reference numeral 29 denotes a flange portion that divides the grain control region 22 into a king flow region 30 and a king flow region 31 directly above the ventilation hole 28, and by applying beading processing, flaring processing, etc., and making the flow control cylinder 21 protrude in the outer circumferential direction. is forming. Reference numeral 32 denotes a ventilation section that is set to have a constant interval between the flow control tube 21 and the inner flame tube top plate 12.

In the above configuration, when the lamp wick 1 is ignited, combustion starts, and high-temperature combustion gas due to combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows into the inner flame tube 6. The air is supplied into the combustion chamber 8 through the air hole 11 of the outer flame tube 7 and the through hole 17 of the red-hot part 16, and combustion continues. At this time, the air supplied from inside the inner flame tube is supplied to the lamp wick from below the flow control tube 21.
The flow is divided into air that is supplied nearby and air that ascends through the air introduction path 23. Some of the air that has risen.

It passes through the ventilation hole 28 and is supplied to the combustion chamber 8 . Furthermore, the air supplied above the inner flame cylinder 6 is supplied to the air holes 11 and the ventilation holes 1
3 to the combustion chamber 8 and above. A portion still falls into the royal region 31 and is also supplied to the combustion chamber 8 from the relatively lower air holes 11 . On the other hand, the vaporized fuel is a mixed gas with air.

As a result, the combustion chamber 8 mainly rises. However, since the pressure in the royal area 30 and the royal area 31 becomes negative, a portion of the mixed gas flows into the royal area 3o and the royal area 31. Therefore, the monarch basin 30 and the monarch basin 31 are filled with unburned gas. This unburned gas is mixed with the air flow in the vent 281 vent 32 and is again supplied to the combustion chamber. Therefore, during strong combustion, unburned gas and air are supplied from near the top of the inner flame tube 6 to the top of the combustion chamber 8 in a well-mixed state, so that the gas is efficiently combusted near area A, and is completely burned here. The remaining unburned gas is combusted by the flame that forms above.

Next, when the exposure height of the lamp wick 1 is lowered to reduce the amount of combustion, the flame gradually descends into the combustion chamber 8.The flow in this case is the same as that during strong combustion, but the vaporized gas Since the amount of unburned gas flowing into the monarchy basin 31 has decreased significantly, the amount of unburned gas flowing into the monarchy basin 31 has also decreased. Therefore, the vicinity of region B becomes a good mixing region, a flame holding state is formed in this region, the 6 walls of the inner flame cylinder become red hot, and the combustion is completed with the flame formed above it. In this case, most of the unburned gas that has flowed into the dominant flow 31 is supplied into the combustion chamber 8 and burned by the flame, so that in the dominant flow region 31 facing above the flame, almost no unburned gas components are present. There are no air holes 11 or ventilation holes 1 above the flame.
The static discharged from 3 is clean and the exhaust gas characteristics (CO/CO
2) does not get worse. Therefore, the combustion amount can be reduced to a considerably low level, and the combustion amount is wide during adjustment.

Further, even at the time of ignition, air is efficiently supplied to the lower part of the combustion chamber 8 from the communication hole 27 and the ventilation hole 28, so that combustion is quickly promoted and the generation of a cocoon odor is reduced. Also,
A similar effect can be obtained when burning for a long time in a well-sealed room. In other words, under oxygen-deficient conditions, the amount of combustion decreases as the oxygen concentration decreases, and a phenomenon similar to that seen when the exposed height of the lamp wick 1 is lowered to reduce the amount of combustion is observed. Since air is supplied to the combustion chamber 8 through the pores 28, combustion is promoted there and oxygen deficiency characteristics are also improved.

Problems to be Solved by the Invention However, the above-mentioned configuration has caused the following problems.

In other words, the amount of combustion can be adjusted over a wide range, but the amount of combustion is adjusted by the height of exposure of the lamp wick 1 into the combustion chamber 8, and the higher the exposure height, the greater the amount of combustion. , the lower the exposure height, the smaller the combustion amount. Therefore,
When the combustion amount is reduced, the flame descends inside the smoking chamber 8 and is formed, so the temperature of the inner and outer fire pans 5 tends to rise, and at the same time, the temperature near the vaporization part of the lamp wick 1 increases. will also rise. Therefore, when the combustion amount is suddenly changed from the minimum position to the maximum position during adjustment, the exposed height of the wick 1 changes suddenly, and the area of the vaporization part increases. At that time, the wick 1
Since the temperature in the vicinity is quite high, the amount of fuel vaporized increases rapidly.

As a result, an excessive flame is generated above the combustion chamber 8, and the flame may extend beyond the exterior top plate, or the flame may protrude outside the top of the front of the appliance. This caused problems in terms of safety and comfort, such as burns and fires, during use. Furthermore, although the above configuration allows for a wide range of adjustment of the combustion amount, there is a problem in that the entire range of the wide adjustment range of the combustion amount cannot be utilized in practice due to the above-mentioned excessive flame. there were.

The present invention solves such conventional problems, and suppresses the excessive flame that occurs when the combustion amount adjustment range is suddenly changed from a small combustion amount to a large combustion amount, and also prevents the generation of C○, odor, and soot. The purpose of the present invention is to provide a combustion device that is safe and comfortable and has a wide range of adjustment of combustion amount.

Means for Solving the Problems In order to solve the above problems, the combustion apparatus of the present invention positions the outer peripheral part of the flame expansion plate above the inner flame tube outwardly than the combustion chamber, and the outer peripheral part The tffi 6 is provided with a downward flange portion and a plurality of protrusions on this flange portion.

Effects of the present invention With the above-described configuration, when the combustion amount suddenly changes from a small combustion amount to a large combustion amount, the amount of vaporized fuel increases and the unburned gas reaches the upper part of the combustion chamber, but the unburned gas reaches the upper part of the inner flame tube. established,
Multiple downward protrusions on the outer periphery of the flame expansion plate, which extends beyond the combustion chamber, disturb the flow and promote mixing, preventing lift and reducing CO, odor, and soot. This can be prevented from occurring. In addition, the flame is divided into smaller parts by the protrusions, increasing the diffusion area with the air, making the flame shorter, and suppressing the occurrence of excessive standing flames.

Embodiment 1 Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. The same parts as those shown in FIGS. 3 and 4 already described are given the same reference numerals, and the explanation thereof will be omitted.

Only the different parts will be explained. In FIGS. 1 and 2, the flame expansion plate 14 provided above the inner flame tube 6 has its outer circumferential portion 14a located outward from the combustion chamber 8, and has a downward flange portion on the outer circumferential portion 14a. A plurality of protrusions 14b are provided on this flange. Further, a plurality of square holes 34 are provided above the red frame portion 16 of the ventilation outer flame tube 7 above the inner flame tube 6.

In the above configuration, combustion is performed in the same manner as that shown in FIG. 3 described above, and exhaust gas characteristics (CO/CO2) can be maintained favorably over a wide range of combustion amount adjustment range. Next, when the combustion amount is adjusted and suddenly changes from a small combustion amount to a large combustion amount, the amount of vaporized fuel increases rapidly, and unburned gas reaches the upper part of the combustion chamber 8. At this time, the flow of unburned gas and air is disturbed by the protrusion 14b of the flame expansion plate 14, which is provided at the top of the combustion chamber 8 so as to be in reliable contact with the unburned gas layer rising inside the combustion chamber 8. , mixing is promoted. As a result, flame lift phenomenon can be prevented, and CO
1. It is possible to eliminate the generation of odor and soot. In addition, the flame touches the protrusions 14b and is fragmented, increasing the diffusion area with the air, thereby making the flame shorter and making it possible to suppress excessive flame formation. At this time, by providing a dense air hole 33 above the inner flame tube 6 and a plurality of square holes 34 above the outer flame tube 7, the amount of air supplied to the standing flame is increased. This further enhances the effect of shortening the flame.

Therefore, the combustion amount adjustment range, which was previously restricted by the excessive standing flame that occurs when the combustion amount suddenly changes from a small combustion amount to a large combustion amount, can be used over a wider range, making it possible to create a combustion device with excellent safety and comfort. can.

Further, the outer peripheral portion 14a of the flame expansion plate 14 is positioned cubically from the combustion chamber 8, and a plurality of protrusions 14b are provided.

By reducing the heat capacity of the flange part, the protrusion 14b can be made red hot when a large amount of combustion occurs, and a red hot part other than the red hot part 16 of the outer flame tube 7 can be obtained, which further enhances the heating effect. I can do it.

When the amount of combustion is small, the flame falls into the combustion chamber 8 and no longer becomes red hot, so it can also serve as an indicator indicating the amount of combustion.

Furthermore, since the flame is finely divided by the projections 14b, there is also the effect of shortening the flame length at the time of combustion.

The case where the outer peripheral part 14 a of the flame expansion plate 14 is provided outward from the combustion chamber 8 has been described above;
This is to further enhance the effect of 4b, and even if it is configured so as to face the combustion chamber 8 as in the conventional example, a certain degree of effect can be obtained.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, when there is a sudden change from a small combustion amount to a large combustion amount, the amount of vaporized fuel increases and unburned gas reaches the upper part of the combustion chamber. The multiple protrusions provided on the outer periphery of the flame expansion plate, which spread further outward than the flame spreader, disturb the flow of unburned gas and air and promote mixing.

It can prevent the flame lift phenomenon and prevent the generation of CO5 odor and soot. However, since the flame is fragmented by the protrusions and the diffusion area with the air is increased, the flame can be shortened and excessive flame formation can be suppressed. This makes it possible to use a wider range of combustion amount adjustment, which has been limited by the excessive standing flame that occurs when there is a sudden change from a small combustion amount to a large combustion amount. In addition, it is possible to make the protrusion red-hot during large combustion, thereby further enhancing the heating effect for viewing purposes, thereby providing a combustion device that is superior in safety, comfort, usability, and appearance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a combustion device showing an embodiment of the present invention; Fig. 2 is a perspective view of the same essential parts; Fig. 3 is a half-cut sectional view of a combustion device showing a conventional example; Fig. 4 is a main part of the same. FIG. 1...Light wick, 6...Inner flame cylinder, 7...
...Outer flame tube, 8...Combustion chamber, 11...
・Air hole, 14...Flame plate, 14a...
-Outer peripheral part, 14b... protrusion. Name of agent: Patent attorney Toshio Nakao and one other person
Light Te6-Inner Flame Tube 7-・-Akuta Moxibustion Simple 8-Hiki Bladder Sumire I44-Outer Part 14b--・-Bokukito 2r! ! J Figure 3

Claims (2)

[Claims] (1) An outer flame tube having a large number of air holes, an inner flame tube having a large number of air holes arranged inside the outer flame tube, and formed between the outer flame tube and the inner flame tube. A combustion device comprising a fuel supply lamp wick set at the lower end of a combustion chamber, a flame expansion plate provided above the inner flame cylinder, and a plurality of downward protrusions provided on the outer periphery of the flame expansion plate. . (2) The combustion device according to claim 1, wherein the outer peripheral portion of the flame expansion plate is located outside the combustion chamber.