JPH0220579Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a combustion tube for a liquid fuel combustion device.

[Prior art and its problems] Conventionally, in a liquid fuel combustion device in which the combustion amount can be adjusted using a combustion wick divided into a plurality of pieces, the combustion chamber is divided into an inner flame tube 41 and an outer flame tube, as shown in FIG. The flame cylinders 42 are completely partitioned from the upper end to the lower end by a partition plate 43. However, when the combustion chamber 44 is almost completely partitioned in this way, it takes time for the combustion draft to stabilize after ignition, and during that time, a strong odor may be generated, or secondary combustion may not be carried out smoothly when switching to strong combustion. There are some drawbacks.

In addition, for example, in a double-tube kerosene stove, the diameters and dimensions of the punching holes, inner and outer flame tubes, etc. must be set to maintain the best balance of combustion conditions, but in this setting, the amount of kerosene vaporized gas is set to be large. If the combustion capacity between the inner and outer flame tubes is exceeded, a standing flame containing unburned gas and soot will rise from the top of the combustion tube.On the other hand, if the setting is such that the amount of gas generated is small, As a result, the reaction mixture of kerosene vaporized gas and air comes into contact with the low-temperature area again, and is dissipated into the atmosphere as incomplete combustion, resulting in an increase in the generation of odors and CO. Because it connects.

In a combustion tube set under the above combustion conditions, when a part of the divided wick is lowered to extinguish the fire in order to reduce the amount of combustion by half from the perspective of room temperature control and economical combustion, the inner and outer parts, which are in a thermally balanced state, are flame tube 4
1, 42, the wick 45, the wick guide 46, and the burner basket 47's temperature will collapse. In other words, the wick on the side that continues to send kerosene gas to the combustion part should be kept at the temperature at which strong combustion occurs, but the extinguishing side receives heat from the combustion side through thermal conduction due to the loss of that heat source. The temperature of the side components decreases, which in turn causes the wick temperature to decrease, causing a decrease in the temperature of the inner and outer flame tubes. Therefore, the combustion balance is disrupted and odors and CO are emitted.
The occurrence of this problem has been increasing and the situation has become uncomfortable, and a solution to this technical problem has been desired.

By the way, the combustion flame of a conventional kerosene stove burner that does not have a partition plate, due to its convergence, focuses toward the inner flame cylinder, but the burner itself is cut laterally, and the density of the flame and the supply air are In this case, the combustion flame is uniform over the entire circumference and the thermal equilibrium state is maintained, so the combustion flame is also uniform.However, if a partition plate is provided, which is essential to the division of the combustion chamber, the combustion flame will be focused in the inner flame tube. Instead of facing the left and right ends of the partition plate, the objects are focused in the center. The reason for this is that combustion air flows uniformly between the left and right partition plates, but the combustion wick is divided into separate combustion chambers to face each other, so a cut occurs near the partition plate. . As a result, during weak combustion, the wick reaches a temperature higher than that at which the kerosene is forcibly vaporized due to heat radiation and conduction from the inner and outer flame tubes, but near the left and right ends of the wick, where there is a break, the wick shifts to the non-burning side. Because heat conduction is active, the temperature is lower than that in the center of the core, and the amount of oil vaporized is also lower. As a result, there is an excess air phenomenon near the partition plate, which prevents the flame from adhering to the punched holes and disrupts the combustion balance.To make matters worse, the excess air causes the flame to converge around the partition plate.
When looking across the burner, the flame density is extremely uneven and there is no thermal balance, and the combustion itself is unstable, with constant flame fluctuations and significant odor and CO emissions. There is a problem.

[Purpose of the invention] The first objective is to prevent heat transfer due to radiation and convection phenomena, which cause large heat transfer, and to prevent stagnation of combustion air.

The second purpose is to shorten the time it takes for the combustion draft to stabilize after ignition compared to conventional ones, and to suppress the generation of odors during that time.

The third objective is to smoothly supply secondary air from the ventilation holes in the baffle plate base, the outer flame cylinder, and the ventilation holes in the upper part of the inner flame cylinder to reduce carbon dioxide gas.

Fourth, it is possible to supply air commensurate with the amount of vaporized gas from the combustion wick.

Fifth, by keeping the convergence of the combustion flame as small as possible, balancing the combustion bounce and heat, and making the red-hot state of the outer flame tube uniform, the combustion state is visually clean and the exhaust gas components are stabilized without deteriorating. be.

[Summary of the invention] This invention consists of a combustion wick divided into multiple parts, and a plurality of combustion chambers corresponding to the upper position of each wick, which are partitioned by arranging a partition plate between the inner and outer flame cylinders. In a liquid fuel combustion device provided with a combustion tube, the upper end thereof is a rectifier plate base, and the left and right ends thereof are connected to an inner wall surface of the inner flame tube, at a position substantially opposite to the circumferential direction angle of the partition plate inside the inner flame tube. The interior of the inner flame cylinder is divided into a plurality of parts by providing partition plates with appropriate gaps between them.

[Example] This will be explained based on FIGS. 1, 2, and 3.

Arc-shaped first and second combustion wicks 1 arranged in a circle,
The arc lengths of wicks 2 and 2 are arranged at a ratio of approximately 6:4, and the first wick 1, which has a larger ratio, is placed on the front side of the liquid fuel combustion device.

On the other hand, a hoistway 1a for the cores 1 and 2 is formed between the core guide cylinder 3 and a pair of core holders 5 inside the burner basket 4, and partition blocks 6 and 7 are provided to separate the hoistway 1a. , 2 according to the ratio. Then, each lead 1, 2 is attached to the two lead holders 5, 5a by claws (not shown) formed therein, and by vertical movement of each lead holder 5, 5a, the leads 1, 2 are attached to the two lead holders 5, 5a. It can be burned by protruding from between the fire pan 8 formed at the upper part of the guide tube 3 and the upper end of the burner basket 4.

A combustion tube 11 having first and second combustion chambers 9 and 10 is provided above the cores 1 and 2, respectively. The first and second combustion chambers 9 and 10 have an inner flame tube 12, an outer flame tube 13 provided concentrically at an interval on the outside, and a space surrounded by the inner flame tube 12 and the outer flame tube 13. It is surrounded by first and second partition plates 14 and 15 that partition the first and second cores 1 and 2 into sections. That is, the partition plates 14 and 15 are located above the partition blocks 6 and 7. Furthermore, an outer cylinder 17 is arranged outside the lower part of the outer flame cylinder 13, and this outer cylinder 17
A glass outer cylinder 18 is provided on the upper part. The upper end of this glass outer cylinder 18 is fixed by an enveloping part 20 formed on the outer edge of a glass presser 19 that is fixed to the upper end of the outer flame cylinder 13, while the inner flame cylinder 12, outer flame cylinder 13, and outer cylinder 17 are fixed. They are integrally connected by a cross pin 21.

Furthermore, an intermediate partition plate 22 is provided inside the inner flame cylinder 12 at a position substantially opposite to the circumferential angle of the first and second partition plates 14 and 15. In addition to the metal plate itself, the partition plate 22 may have one or more holes at appropriate locations for air circulation, and may be made of a heat-resistant material such as a stainless steel plate or an aluminum alloy with a plated surface. It is desirable to have excellent reflectivity and no discoloration. That is, one side 23 of the middle partition plate 22 is oriented toward the first partition plate 14 and the other side 24 of the middle partition plate 22 is oriented toward the second partition plate 15, centering on the central axis of the combustion cylinder 11. 22 is provided. Then, the upper end 28 of this partition plate 22 is fixed to a rectifying plate stand 25 provided so as to close the upper end of the inner flame cylinder 12 with a gap a provided therebetween. This fixation is achieved by fitting a protrusion 27 formed on the upper edge of the partition plate 22 into a ventilation hole 26 formed in the rectifying plate base 25. Furthermore, a gap b of about 2 to 5 mm is provided between the left and right ends 29 of the partition plate 22 and the inner flame cylinder 12. The intermediate partition plate 22 is positioned within the inner flame cylinder 12 by passing through the play protrusion 27 and the square hole 30 formed at the lower part of the intermediate partition plate 22 by the cross pin 21. Further, a guide plate 32 having a through hole 31 is provided below the partition plate 22 of the inner flame tube 12 so as to close the lower part of the inner flame tube 12, so that air from the core guide hole 33 passes through the ventilation hole 31 and burns. Riding on the rising airflow generated by
The combustion chamber 9, 1 is opened from the punched hole 35 formed in 2.
While supplying air to the air, it mixes with the combustion gas flowing out along the upper rectifying plate 34 provided at the upper part of the rectifying plate base 25 and expanding upward from the ventilation hole 26, and is discharged into the atmosphere. Also, there are punching holes 3 in the outer flame cylinder 13.
6 is provided so that outside air can be supplied to the combustion chambers 9 and 10 through the punched holes 36.

30mm from the bottom surface of the first and second partition plates 14 and 15
30 at a position above and below the red hot part of the outer flame tube 13
An opening 37 of mm ² or more and 200 mm ² or less is provided, and the length of the partition plates 14 and 15 is longer than the mixing area of the outer flame tube 13, and this length is 60% of the red hot part of the outer flame tube 13.
The following shall apply.

Furthermore, as shown in FIG. 3, the first and second partition plates 1
Punching hole 35a of inner flame cylinder 12 near 4, 15
The arrangement of the punch holes 35b is made coarser than other locations, that is, the punch holes 35b closer to the center.

Next, the effect will be explained.

During weak combustion, the first wick 1 protrudes from the fire pan 8 and is ignited. At this time, combustion heat is conducted, radiated, and convected from the inner flame tube 12 side forming the first combustion chamber 9 on the combustion side to the inner flame tube 12 side forming the second combustion chamber 10 on the non-combustion side second combustion side. However, it is blocked by the partition plate 22, which prevents the conduction and the like. That is, the heat radiated from the inner flame tube 9 forming the first combustion chamber 9 on the combustion side is transferred to the inner partition plate 22.
They are intercepted by the flames, and then return to their original state by reflection, thereby thermally interfering with each other to prevent the temperature of the first combustion chamber 9 from decreasing. Also, the partition plate 22 is connected to the combustion chamber 9,
By providing the partition plates 14 and 15 that are substantially opposite to the circumferential angle of the partition plates 10, the cold air flowing into the inner flame tube 12 is divided into two, and a large amount of cold air, that is, the cold air on the second combustion chamber 10 side, is divided into two parts. Combustion is not affected by Therefore, the influence of heat reduction due to convection received from cold air, that is, combustion air, can be halved.

Furthermore, by providing the gap a, a larger amount of air from the non-combustion side near the rectifying plate stand 25 is taken in and mixed with the combustion side through the gap a, thereby stabilizing the secondary combustion. Furthermore, by providing the gap b, a large amount of air can be taken into the vicinity of the first and second partition plates 14 and 15 of the first combustion chamber 9 on the combustion side, where conventionally the supply density of combustion air is coarse. This prevents stagnation of combustion air, resulting in loss of combustion balance and
Odor and CO generation can be suppressed.

On the other hand, by providing the opening 37 so that the first and second combustion chambers 14 and 15 communicate with each other, stability at the start of combustion can be achieved. This is because combustion air is supplied to the first combustion chamber 9, which is the combustion side, from the second combustion chamber 10, which is the non-combustion side, and the combustion draft after ignition becomes more stable. Then, inside this opening 37 position,
By locating the position 30 mm above the bottom of the outer flame tubes 12 and 13 and below the red-hot part of the outer flame tube 13, the primary air mixing area is completely separated by the partition plates 14 and 15, and the primary combustion is It is stabilized and air can be reliably supplied to the secondary combustion area. Further, by setting the area of the opening 37 to 30 mm ² or more and 200 mm ² or less, an appropriate amount of air can be supplied.
In other words, if the area of the opening 37 is 200 mm ² or more, the flame will be biased toward the center during combustion, making the combustion condition unstable, and if the area of the opening 37 is 30 mm ² or less, the amount of air supplied will be insufficient. This results in unstable combustion conditions.

By making the lengths of the first and second partition plates 14, 15 longer than the mixing zone of the outer flame tube 13 and 60% or less of the red-hot part of the outer flame tube 13, the first combustion chamber on the combustion side 9 and the lower part of the second combustion chamber 10, which is the non-combustion side, are completely partitioned so that combustion can be performed independently, while in the upper part, the combustion chambers 9 and 10 become one combustion chamber. That is, the upper part is no longer affected by the first and second partition plates 14 and 15, and the rectifier plate base 25
The secondary air is smoothly supplied from the ventilation holes 26 and the punched holes 35 and 36 at the upper parts of the inner and outer flame tubes 12 and 13, thereby suppressing the generation of CO.

By arranging the punching holes 35a provided in the inner flame cylinder 12 more sparsely near the first and second partition plates 14 and 15 than the other punching holes 35b as shown in FIG. At 9, you can suppress the focus of the flame.

This is done by adjusting the arrangement of the punching holes 35a near the first and second partition plates 14 and 15, so that the exhaust gas components are not deteriorated and the combustion is carried out with a slight lack of air. The high-temperature gas acts to spread in the direction of the first and second partition plates 14 and 15, and as a result, the high-temperature gas can be exhausted while being moved in the direction of the first and second partition plates 14 and 15.
Can suppress the focus of flames. In order to prevent lifting of the blue flame due to significant flame convergence at the start of combustion, it is preferable to arrange the punched holes 35, 35a on the side of the outer flame tube 13, which has a higher degree of opening to the atmosphere. Further, when combustion is stable, it is better to arrange the above arrangement on the inner flame tube 12 side where the temperature difference is smaller than the outer flame tube 13 over the entire circumference. This is because the temperature difference at each position is smaller on the inner flame tube 12 side where the hot air is concentrated.In other words, the intake capacity of combustion air changes depending on the temperature difference, and the higher the temperature, the more active the movement of the airflow. The intake is more uniform than that of the outer flame tube 13, and as a result, the combustion air near the partition plates 14 and 15 becomes excessive, which does not match the amount of vaporized gas of the liquid fuel, and a lift phenomenon occurs near the partition plates 14 and 15. This is due to the fact that it is easy to occur.

In addition, although the combustion wick, the combustion chamber, and the inner flame cylinder are divided into two parts in the embodiment, they may be divided into three or more parts, and in the embodiment, there is only one opening for communicating between the combustion chambers. Although this is shown, there may be two or more locations. Further, the punching holes may be arranged on both the inner and outer flame tubes, or only on the outer flame tube.

Further, the ratio of the cores is not limited to 6:4, but may be 7:3 or 1:1.

[Effect of the invention] This invention divides the combustion wick into multiple pieces and the multiple combustion chambers corresponding to the upper position of each wick by arranging a partition plate between the inner flame tube and the outer flame tube. In a liquid fuel combustion device provided with a combustion tube, the upper end thereof is a rectifier plate base, and the left and right ends thereof are connected to an inner wall surface of the inner flame tube, at a position substantially opposite to the circumferential angle of the partition plate inside the inner flame tube. By dividing the inside of the inner flame cylinder into multiple parts by forming appropriate gaps between them and dividing the inside of the inner flame cylinder into multiple parts, it is possible to prevent heat transfer due to radiation and convection phenomena, which have a large heat transfer rate, and to further reduce the flow of combustion air. It is possible to prevent stagnation, shorten the time it takes for the combustion draft to stabilize after ignition, and suppress the generation of odor during that time.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of this invention, FIG. 2 is a cross-sectional view of the same, FIG. 3 is a front view showing the inner flame cylinder in an expanded state, and FIG. 4 is a partial sectional view of a conventional example. 1, 2... Combustion wick, 9, 10... Combustion chamber, 1
2... Inner flame tube, 13... Outer flame tube, 14, 15...
Partition plate, 22... Middle partition plate, 25... Rectifier plate stand,
35, 35a, 35b...Punching holes, a, b
...Gap area.

Claims (1)

[Scope of claim for utility model registration] (1) A combustion wick divided into a plurality of pieces, and a plurality of combustion chambers corresponding to the upper position of each wick, with a partition plate arranged between the inner flame tube and the outer flame tube. In a liquid fuel combustion device provided with a combustion tube divided into sections, the inner flame tube has a rectifying plate base at its upper end at a position substantially opposite to the circumferential direction angle of the partition plate;
A combustion tube of a liquid fuel combustion device characterized in that the left and right ends of the inner flame tube are divided into a plurality of parts by forming appropriate gaps between them and the inner wall surface of the inner flame tube and providing a partition plate therebetween. . (2) At least one place on the partition plate 30mm from the bottom surface of the inner flame tube and outer flame tube so that the combustion chambers communicate with each other.
^30mm above and below the red hot part of the outer flame tube
A combustion tube for a liquid fuel combustion device according to claim 1, characterized in that it has an opening with a size of not less than 200 mm ² and not more than 200 mm 2 . (3) The length of the partition plate is longer than the mixing area of the outer flame tube, and is formed to be 60% or less of the red-hot part of the outer flame tube. Combustion tube for liquid fuel combustion equipment. (4) A request for registration of a utility model characterized in that the punching holes in one or both of the inner and outer flame tubes formed near the partition plate are formed more coarsely than the punching holes in other parts to reduce the amount of air passing through. A combustion tube for a liquid fuel combustion device according to item 1.