JPH0220582Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a liquid fuel combustion device in which a plurality of combustion wicks can burn independently.

[Prior art] A plurality of combustion wicks that move up and down along a wick guide tube and a plurality of combustion chambers corresponding to the upper position of each wick are arranged with a partition plate between an inner flame tube and an outer flame tube. A liquid fuel combustion device in which a divided combustion tube is provided and the inner flame tube of the combustion tube communicates with the wick guide tube is developed in the Jichi Kosho era.
This method is known from, for example, Japanese Patent No. 47-36419.

As shown in FIG. 4, such a liquid fuel combustion device uses a combustion wick 41 that is divided into a plurality of pieces and arranged in an annular manner.
A core guide tube 42 is provided inside the core guide tube 42, and the core 41 is mounted so as to move up and down along the core guide tube 42. A fire pan 43 is provided above the wick guide tube 42, and a combustion tube 45 having a combustion chamber 44 corresponding to the wick 41 is mounted on the fire pan 43. Further, this combustion chamber 44 includes an inner flame tube 46 and an outer flame tube 47 arranged concentrically, and among these,
A space surrounded by the outer flame tubes 46 and 47 is surrounded by a partition plate 48 that partitions the space corresponding to the core 41 . Small air supply holes 46a and 47a are formed in the inner and outer flame tubes 46 and 47, respectively. An outer cylinder 49 is disposed outside the outer flame cylinder 47, and the inner flame cylinder 46, outer flame cylinder 47, and outer cylinder 49 are integrally connected with a cross pin (not shown).

Further, above the inner flame cylinder 46, an upper rectifying plate 50,
A lower current plate 51 is provided below, and each current plate 50,
51 is formed with ventilation holes 52 and 53, and a rectifying plate 54 is provided so as to close the upper part of the core guide cylinder 43, and a ventilation hole 55 is also provided in this rectifying plate 54, so that the inside of the core guide cylinder 42 and the above The inside of the inner flame tube 46 is in a communicating state.

During combustion, vaporized gas of liquid fuel is generated from the wick 41, while combustion air is passed from the wick guide tube 42 through the ventilation holes 55 and 53 to the inner flame tube 4.
Air in the combustion chamber 6 is supplied to the combustion chamber 44 through the small hole 46a, and also from the outside through the small hole 47a. Then, the mixed vaporized gas enters the combustion chamber 44.
burn inside.

[Problems with the prior art] In conventional liquid fuel combustion devices, flames tend to form during combustion on one side of the wick, that is, during weak combustion.
There was also the problem of easy generation of odor and CO.

The first reason for this is that the combustion chamber 4 on the combustion side has a high temperature.
4, air expansion is active, so the static pressure is higher than that in the non-combustion side combustion chamber, and as a result, the air inflow resistance on the combustion side combustion chamber 44 side becomes large. For this reason, the air flowing in from the wick guide tube 42 tends to flow into the non-combustion side combustion chamber, resulting in air-deficient combustion in the combustion side combustion chamber.

The second reason is that the temperature difference in the combustion chamber 44 between the combustion tube 45 and the lower part of the core guide tube 42 is generally large, so the amount of draft generated by buoyancy is large and the dynamic pressure is also high. The draft Z is Z=H(γa−γg)
It is. However, H is the height, γa is the specific weight of outside air,
γg is the specific weight of combustion gas. However, the buoyancy, draft, and dynamic pressure are easily affected by changes in room temperature, that is, changes in supply air temperature, and therefore the combustion state is likely to change due to changes in supply air temperature. When the room temperature, that is, the supply air temperature increases, the above (γa - γg) becomes smaller, and as a result, the draft force becomes lower, so the amount of air supplied decreases. Therefore, due to the increase in the temperature of the supply air, air-deficient combustion occurs in the combustion chamber on the combustion side.

Furthermore, as a third reason, the temperature of the combustion wick 41 itself increases due to the increase in room temperature, that is, the temperature of the supplied air, and as a result, the amount of vaporized gas increases. For this reason, there is an excess of vaporized gas in the combustion chamber 44 on the combustion side.
That is, air-deficient combustion occurs in the combustion chamber 44 on the combustion side.

Due to the above reasons, when one side of the wick burns,
In other words, during weak combustion, flames were likely to stand, and odor, CO, etc. were generated.

Also, when one side of the wick 41 burns, that is, when it burns weakly,
In addition, the outer flame cylinders 46 and 47 have high-heat and low-temperature red-hot parts, which spoil the appearance, and the structure of the combustion cylinder 45 itself causes problems such as the generation of odor and CO.

The reason for the generation of this odor and CO is that the combustion chamber 44 on the combustion side is partitioned by the partition plate 48, which makes the density of the combustion flame non-uniform. In other words, during the course of combustion, combustibles (hydrocarbons) and oxygen are continuously supplied as the flame propagates, and these interfere with each other. When it is annular, the temperature on the inside is higher than the outside, so the draft is larger than on the outside.
Since the exhaust is carried out while drawing in the outer flame, the flame is focused towards the inner flame tube.

However, if the partition plate 48 is present,
Since molecules such as H, C, and O are blocked, they are not circular but linear. Therefore, the hottest flame is located in the center, resulting in a central focus of the flame. At the ends of the combustion chamber 44, heat conduction causes flame density to become more uneven than in the center, resulting in the generation of odor and CO.

[Purpose of the invention] This invention consists of a plurality of combustion wicks that move up and down along a wick guide tube, a plurality of combustion chambers corresponding to the upper position of each wick, and a partition plate between an inner flame tube and an outer flame tube. In a liquid fuel combustion device that has a combustion tube arranged and divided, and in which the inside of the inner flame tube of the combustion tube communicates with the wick guide tube, standing flames, odors, and The purpose is to suppress the generation of CO, etc.

[Summary of the invention] This invention provides a first partition plate inside the inner flame cylinder at a position substantially opposite to the circumferential angle of the partition plate, and a first partition plate at a position substantially opposite to the circumferential angle of the first partition plate. 2
This is a liquid fuel combustion device in which a partition plate is provided inside the core guide tube, and the first and second partition plates form an air supply path to each combustion chamber, preventing air shortage phenomenon during weak combustion. Mitigates and suppresses flames, odors, and CO emissions.

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

Arc-shaped first and second combustion wicks 1 arranged in an annular manner,
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, the hoistway 5 of the cores 1 and 2 is connected to the core guide tube 3.
and the burner basket 4, and also between the hoistway 5 and the burner basket 4.
Partition blocks 6 and 7 are provided according to the ratio of the cores 1 and 2 to partition the cores 1 and 2, respectively. Each wick 1, 2 is moved up and down along a wick guide tube 3, and is provided so as to protrude from a fire pan 8 formed at the upper end of the burner basket 4 for combustion.

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, a first 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. This first partition plate 2
2 is preferably a metal plate, a stainless steel plate, an aluminum alloy with a plated surface, etc. that has excellent heat reflectivity and does not discolor, and has one or more holes in the appropriate place to allow air circulation. Good too. This first partition plate 22 has one side 23 of the first intermediate partition plate 22 centered on the center of the combustion cylinder 11 as the first partition plate 14.
The other side 24 of the middle partition plate 22 in the direction of the second partition plate 15
Provided in the direction of The upper end 28 of this first partition plate 22 is fixed to the upper rectifier plate 25 provided so as to close the upper end of the inner flame tube 12 with a gap a provided therebetween. This fixation is achieved by fitting a protrusion 27 formed on the upper edge of the first partition plate 22 into a ventilation hole 26 formed in the upper rectifying plate 25 . This first partition plate 2
The first intermediate partition plate 22 is positioned within the inner flame cylinder 12 by passing the cross pin 21 through the square hole 30 formed in the lower part of the intermediate partition plate 22. Furthermore, the first partition plate 2 of the inner flame cylinder 12
A lower guide plate 32 having a ventilation hole 31 is provided below the inner flame cylinder 12 so as to close the lower part of the inner flame tube 12, and a ventilation hole 33a is also formed in the rectifying plate 33 provided to close the upper end of the wick guide 3. The inside of the guide tube 3 and the inside of the inner flame tube 12 are provided so as to communicate with each other. Therefore, air from the vent hole 33a passes through the vent hole 31, rides on the rising air current generated by combustion, and reaches the first partition plate 22.
The air is divided into two parts and rises, and air is supplied to the combustion chambers 9 and 10 through small holes 35 formed in the inner flame cylinder 12. Further, a tapered current plate 3 having a shape that expands upward from the ventilation hole 26 is provided at the upper part of the upper current plate 25.
4, mixed with exhaust combustion gases and released into the atmosphere. Further, the outer flame cylinder 13 is also provided with a small hole 36 so that outside air can be supplied to the combustion chambers 9 and 10 through the small hole 36.

Furthermore, a second partition plate 37 is provided within the core guide tube 3 at substantially the same angle and position as the circumferential direction of the first partition plate 22 . That is, the second middle partition plate 37 is centered on the center of the guide cylinder 3.
One side 38 faces the partition block 6, and the other side 38
9 is directed toward the partition block 7, and the inside of the guide tube 3 is partitioned into two. Therefore, the air flowing in from below the guide tube 3 is divided into two parts by the second partition plate 37 and rises to flow into the inner flame tube 12.

Furthermore, a gap b of 3.5 mm or less is formed between the partition plates 14, 15 and the inner flame tube 12. In addition, the height of the partition plates 14 and 15 is made longer than the mixing area of the outer flame tube 13, and this length is set to 60% of the red-hot part of the outer flame tube 13.
The following shall apply.

Next, the effect will be explained.

During weak combustion, only the first wick 1 protrudes from the fire pan 8 and ignites, and only the first combustion chamber 9 side is brought into a combustion state. At this time, the air flow from below the core guide tube 3 is divided into two by the second partition plate 37, flows into the inside of the inner flame tube 12 through the ventilation hole 33a, and the air flow from below the core guide tube 3 is divided into two parts by the second partition plate 37, and flows into the inner flame tube 12 through the ventilation hole 33a. The air is divided into two by the partition plate 22 and rises. At this time, even if the static pressure of the air increases due to combustion in the first combustion chamber 9 side and the air inflow resistance increases, the core guide tube 3
The second partition plate 37 can prevent air from escaping toward the non-combustion side combustion chamber 10 in the combustion chamber 10, and an appropriate amount of air can be supplied.

During weak combustion, the room temperature, that is, the supply air temperature increases, and even if (γa - γg) in the draft becomes small, the height H in the draft remains from the upper end of the combustion tube 11 to the lower end of the second partition plate 37. For,
A significant drop in draft is suppressed, and air is actively supplied to the combustion chamber 9 on the combustion side.

Furthermore, an appropriate amount of air is supplied to the first core 1 by preventing air from escaping by the second partition plate 37 and by increasing the draft height. For this reason, the first wick 1 is kept at an appropriate temperature and can generate an appropriate amount of vaporized gas, eliminating an excess vaporized gas state and suppressing air-deficient combustion.

In addition, the second intermediate partition plate 37 is placed at approximately the same angle and position in the circumferential direction as the first intermediate partition plate 22.
By arranging the cores, air can be supplied in a rational manner at the ratio of the divided cores 1 and 2. Therefore, stable combustion can be obtained during strong combustion, that is, during combustion of the first and second wicks 1 and 2.

Furthermore, in the combustion tube 11, during weak combustion, combustion heat tries to move from the first combustion chamber 9, which is the combustion side, to the second combustion chamber 10, which is the non-combustion side, by conduction, radiation, and convection; 1 and is blocked by a partition plate 22 to suppress the conduction and the like. That is, the heat radiated from the inner flame cylinder 12 forming the first combustion combustion chamber 9 on the combustion side is blocked by the first partition plate 22, and then returns to the original state by reflection, causing thermal interference with each other. This prevents the temperature of the first combustion chamber 9 from decreasing.
In addition, by providing the first intermediate partition plate 22 so as to substantially face the circumferential angle of the partition plates 14 and 15 that form the combustion chambers 9 and 10, the cold air flowing into the inner flame cylinder 12 is divided into two parts. Combustion is not affected by a large amount of cold air, that is, by the cold air on the second combustion chamber 10 side. Therefore, the influence of heat reduction due to convection received from cold air, that is, combustion air, can be halved.

Furthermore, during weak combustion, the partition plates 14 and 15 and the inner flame tube 1
Since the non-combustion side combustion chamber 10 and the combustion side combustion chamber a are partially in communication with each other through the gap b between the two, the molecular activities of H, C, O, etc. are free without being blocked by the partition plates 14 and 15. As a result, despite the presence of the partition plates 14 and 15, the cross-sectional shape of the flame becomes annular and converges on the inner flame tube 12. As a result, the density of the combustion flame becomes uniform, and the generation of odors and CO can be suppressed. Note that if the distance of the gap b is larger than 3.5 mm, red flames and soot will be generated due to excess air, so the gap b should be 3.5 mm or less. Furthermore, the gap b makes it possible to reduce the difference in degree between the high-temperature red-hot parts and the low-temperature red-hot parts that occur in the inner and outer flame tubes 46 and 47 during weak combustion.

In addition, although the combustion wick, combustion chamber, and inner flame tube are divided into two parts in the embodiment, they may be divided into three or more parts, and the ratio of the wicks is not limited to 6:4 but may be 7:3. Alternatively, it may be 1:1 etc.

[Effect of the invention] This invention consists of a plurality of combustion wicks that move up and down along a wick guide tube, and a plurality of combustion chambers corresponding to the upper position of each wick, with a partition plate between the inner flame tube and the outer flame tube. In a liquid fuel combustion device in which a combustion tube is arranged and partitioned, and the inside of the inner flame tube of the combustion tube and the inside of the wick guide tube are in communication, the inside of the inner flame tube is substantially opposite to the circumferential direction angle of the partition plate. A first partition plate is provided at a position where the combustion cylinder is opened, and a second partition plate having an angle in the circumferential direction that is approximately the same as that of the first partition plate is provided inside the core guide tube. Since an air path corresponding to each wick combustion chamber is formed upwards, it is possible to suppress the generation of standing flames, odors, and CO when one wick burns, that is, during weak combustion, compared to conventional types. .

[Brief explanation of the drawing]

Figure 1 is a partial sectional view of this device, and Figure 2 is a partial cross-sectional view of this device.
FIG. 3 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 4 is a partial cross-sectional view showing a conventional example. 1, 2... Combustion wick, 3... Wick guide tube, 9,
10... Combustion chamber, 11... Combustion tube, 22... First
Middle partition plate, 37...Second middle partition plate, b...Gap.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of combustion wicks that move up and down along a wick guide tube, and a plurality of combustion chambers corresponding to the upper position of each wick, between an inner flame tube and an outer flame tube. In a liquid fuel combustion device in which a combustion tube partitioned by a partition plate is provided, and the inside of the inner flame tube of the combustion tube communicates with the inside of the wick guide tube, the circumferential angle of the partition plate is set inside the inner flame tube. A first partition plate is provided at a position substantially facing the first partition plate, and a second partition plate is provided at a position substantially opposite to
A liquid fuel combustion device characterized in that a partition plate is provided inside the core guide cylinder. (2) The liquid fuel combustion device according to claim 1, which is a registered utility model, characterized in that a gap is provided between the partition plate and the inner flame tube.