JPS61138012A - Kerosene burner - Google Patents

Abstract

PURPOSE:To obtain a burning equipment capable of maintaining a stable burning condition by a method wherein in a perforated plate which is formed a combustion chamber, at its surrounding area near by around the tip-end of a wick, a pitch between holes and diameter of the hole are specified in a structure. CONSTITUTION:At least one partial surface of the perforated plate 5 which forms a combustion chamber 10, at a position nearby the tip-end a wick 1, are formed with two rows in a horizontal direction of holes 21 in a way that the both pitches between holes in a horizontal and vertical directions are smaller than those of others, and the pitch between the holes of the above rows in a vertical direction (z) is about two times of the average diameter of the above tow rows in a horizontal direction, further, in the lower row 20b, its hole diameter and the pitch between holes in a horizontal direction (y) is smaller than those of the upper low of 20a. Besides, the holes in the upper and the lower row 20a, 20b are to be placed cyclically on the same vertical line. As for the control mean of the air flow, a damper 17 is provided and one part of the perforated plate 5 is formed the first red-heated body 9 by enlarging its open hole ratio, also at the upper part of a outer-cylinder 8, the flue 14 is provided, in which the second red-heated body 16 is installed. By this constitution, it is possible to obtain a stable burning condition.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wick-type oil combustor used as a heating device.

Conventional technology In wick-type oil combustors, combustion near the tip of the wick has a very large effect on fuel vaporization from the wick and, ultimately, on the overall combustion. Numerous proposals have been made to improve the arrangement, size, etc. of the pores (for example, Japanese Utility Model Publication No. 46-8063).

Problems to be Solved by the Invention However, in these conventional methods, the reproducibility of both the combustion quantity and quality (combustion state or exhaust gas characteristics, etc.) is poor for steady combustion after ignition during repeated ignition/extinguishing operations. Although the combustion condition had reached an almost satisfactory level, once the combustion condition was disrupted due to disturbances such as wind, it was difficult to return to the original good condition, and poor combustion continued for a long time. Problems were often caused by unburned toxic gases, soot, and foul odors.

Furthermore, recently, from the viewpoint of energy saving and comfort, there has been a demand for this type of combustor to be able to vary the combustion amount. It is difficult to obtain repeatability during combustion, and a combustor that can fully meet the above requirements has been awaited.

These problems are almost entirely due to the instability and lack of reproducibility of pore combustion near the tip of the wick, which has a great effect on the vaporization of the fuel, that is, the amount of combustion, either partially or as a whole. It was something.

Means for Solving the Problems The present invention has been made in view of these problems, and in the vicinity of the tip of the wick in at least one stroke of the perforated plate forming the combustion chamber, the pitch between the holes is different both vertically and horizontally. Two horizontal rows of holes smaller than the majority are formed, the vertical pitch between the holes in the two rows is approximately twice the average hole diameter of the two rows, and the lower hole row is Both pitches are smaller than the row of upper holes, and the upper holes and lower holes are arranged periodically on the same vertical line.

Furthermore, a damper is provided on the most downstream side of the combustor as an air flow rate control means for controlling the flow rate of air supplied to the combustion chamber.
porous! 1 has a large aperture ratio to form a first incandescent body, and the upper part of the outer cylinder forms a flue, and a second incandescent body is disposed within this flue, and the first and second incandescent bodies are A window made of a heat-transparent material is provided in a part of the outer cylinder facing the incandescent body. In addition, the combustion chamber has a flat shape.

For production The present invention operates as follows due to the above configuration.

In the present invention, two horizontal rows of combustion pores are formed near the tip of the wick as the main heat (replenishment) source for vaporizing fuel from the wick.

In other words, if the pore combustion in that part is stable, uniform throughout, has good reproducibility, and has good recovery performance when subjected to disturbance numbers, then
This is naturally the case with combustion when looking at the equipment as a whole. In other words, in order to stabilize pore combustion, it is necessary to
This is achieved by providing the holes approximately twice as close as the average hole of both holes, and in this case, the upper row is particularly uncomfortable. The flame stability of pore combustion in this area is naturally better in the upper row, so the pores in the upper row should be made larger in diameter to serve as the main pores, and the pores in the lower row should be made smaller in diameter to serve as auxiliary pores. As a result, pore combustion is further reduced. Regarding the horizontal pitch, it is better to make the pitch smaller than most of the other parts in order to improve the fire transfer between the adjacent holes and the □. At this time, if the main pores are too close, the combustion flames of adjacent pores will interfere with each other and become unstable, so it is best to set the main pores at about 3 times the pore diameter during the day. However, the diameter of the auxiliary pores in the lower row is smaller and there is no need for them to stably hold the flame, so lateral fire transfer will be better if they are placed closer together than in the upper row. Even if part of the pore combustion is extinguished due to a disturbance such as wind, for example, with the above-mentioned structure, the flame spreads to the entire combustion chamber instantly, resulting in extremely good combustion recovery performance.

Further, in the present invention, a damper is used as the air flow control means, and the combustion amount is controlled by opening and closing the damper. In other words, by controlling the amount of air flowing into the combustion chamber, the amount of fuel in the two rows of pores is controlled, the amount of heat supplied to the wick changes, and the amount of vaporization from the wick, that is, the overall combustion amount, changes. Become. At this time, since the air amount and the combustion amount are changed simultaneously at an appropriate ratio, it is possible to control the combustion amount over a wide range. In reality, the number of stomatal combustions in the two rows mentioned above changes depending on the opening and closing of the damper, but by assigning an order of strength to the flame stability of stomatal combustion, the changes can be made smoothly and uniformly under extreme pressure. It will be held in Comparing the upper and lower rows, the upper row has better flame retention, and the horizontal pitch of the upper and lower rows is different, so there are places where the holes in the upper and lower rows are on the same vertical line and places where they are not. be able to. When this vertical relationship is on the same vertical line, the flame holding power is maximum, especially in the upper row of the pores. Therefore, when changing the combustion amount from strong to weak, pore combustion gradually disappears starting from the weak flame holding power.

At this time, by periodically providing portions with strong flame holding power at equal intervals, the overall uniformity of combustion can be maintained well. Further, when operating from weak to strong, the above-mentioned good return performance is exhibited, making it possible to quickly shift to strong combustion.

As described above, according to the present invention, the uniformity of combustion is excellent in various conditions, so even when an incandescent body is provided, the uniformity of the degree of incandescence is good, which improves the appearance and radiation efficiency. From this point of view, it is possible to make even more use of its characteristics. In particular, when the heat possessed by the exhaust gas after combustion is completed is used to make the second incandescent body red-hot, non-uniformity in combustion tends to be extremely apparent in the degree of red-hotness in some parts, but this invention can eliminate this problem. This means that the radiation efficiency can be further increased.

The effect of the above configuration is effective regardless of whether the combustion chamber is round or flat; however, in the case of a flat combustion chamber, the presence of both ends ensures uniformity of combustion in the longitudinal direction. This is a particularly effective method because it is generally difficult to obtain.

Example FIG. 1 shows a longitudinal sectional view of an embodiment according to the present invention.

Reference numeral 1 designates a lamp wick, the lower part of which is immersed in petroleum fuel 4 in a fuel tank 3, and the upper part located at the lower part of a combustion chamber 1o formed by a perforated plate 6 having a large number of pores 6a. 2 is a knob for moving the lamp wick 1 up and down, and 9 is a first incandescent body whose incandescence is improved by increasing the aperture ratio of the perforated plate 6. In addition,
In this embodiment, the combustion chamber 10 has a flat shape.

8 is an outer cylinder, the upper part of which forms a flue 14, and a second incandescent body 16 is provided in the flue 14 so as to be inclined upward from the rear side to the front side and cross the flue 14; A window 16 made of a heat-transparent material such as glass is provided in the front portion of the outer cylinder 8 facing the first and second incandescent bodies 9 and 16. Outer cylinder 8
is placed on the outer cylinder stand 7, and the perforated plate 6 forming the combustion chamber 1Q is placed on the fire pan 6. Reference numeral 11 designates a secondary combustion part formed by a partition plate 12 having a flame port 13 to complete combustion, 18 an air intake port, and 19 an air intake port formed between the outer cylinder 8 and the perforated plate S. 1γ is a damper for controlling the amount of combustion by controlling the flow rate of supplied air by opening and closing the passage.

FIG. 2 is a view of the main parts of the section A in the embodiment shown in FIG. 1 when viewed from the combustion chamber 1o side, and FIG. 3 shows another embodiment of the rotating section.

In FIG. 2, two rows of holes 21 provided near the upper end of the lamp wick 1 consist of an upper hole row 20a and a lower hole row 20b.
The horizontal pitch of a! , the horizontal pitch of the lower hole rows 20b is indicated by y, and the vertical pitch between the upper hole rows 20a and the lower hole rows 20b is indicated by 2. At this time, the value of The pores are arranged so that they are on the same vertical line. Further, in the embodiment shown in FIG. 3, an upper hole row 20'a, a lower hole row 20'
In the two rows of pores 21' consisting of b, y and 2 are slightly smaller than those shown in Fig. 2, so that the upper and lower pores are on the same vertical line with a period of X (or 2y). It is.

In both Fig. 2 and Fig. 3, two rows of holes 21, 2
The vertical pitch 2 of 1' is approximately twice the average hole diameter of the upper and lower rows, and the lower hole rows 20b and 20'b have the same hole diameter and hole pitch as the upper hole row 20a.

It is smaller than 20'a.

Effects of the Invention As described above, according to the present invention, when disturbances such as wind occur, it is possible to instantly return to the original good combustion state, and even when the combustion amount is changed. In this case, for any combustion amount within the combustion amount variable range, a uniform and stable combustion state with good reproducibility can be obtained with a simple configuration, which is a great effect. Furthermore, because of its good uniformity, even when an incandescent body is installed, it is possible to provide a combustor that is beautiful in appearance, has high radiation efficiency, and is extremely useful in practice.

[Brief explanation of the drawing]

FIG. 1 shows a longitudinal sectional view of an embodiment according to the present invention, and FIG.
The figure shows a front view of the main parts of section A in FIG. 1 viewed from the combustion chamber 10 side, and FIG. 3 shows another embodiment of the turning section. 1... Lamp wick, 6... Perforated plate, 8...
...Outer cylinder, 9...First incandescent body, 10...
... Combustion chamber, 14... Flue, 15...
Window, 16... Second incandescent body, 17... Damper, 20a, 20'a-... Upper hole row, 20b, 20
'b...Bottom hole row, 21.21'...Two hole rows. Name of agent: Patent attorney Toshio Nakao and 1 other person Koji 1
figure

Claims (5)

[Claims] (1) A lamp wick that is movable up and down is placed in the lower part of a combustion chamber made of a perforated plate, and an outer cylinder is placed outside the combustion chamber, so that at least one stroke of the perforated plate is located near the tip of the lamp wick. , two horizontal rows of holes are formed in which the pitch between the holes is smaller than most of the other holes both vertically and horizontally, and the vertical pitch between the holes of the two rows is approximately twice the average hole diameter of the two rows. And the prepared hole row is
An oil combustor in which both the hole diameter and the pitch between holes are smaller than the row of upper holes, and the upper and lower holes are arranged periodically on the same vertical line. (2) The oil combustor according to claim (1), further comprising an air flow rate control means for controlling the flow rate of air supplied to the combustion chamber. (3) The oil combustor according to claim (2), wherein the air flow rate control means is a damper provided at the most downstream side of the combustor. (4) A part of the perforated plate has a larger aperture ratio than the other part to form a first incandescent body, a flue is formed in the upper part of the outer cylinder, and a second incandescent body is arranged in the flue. In addition, the first,
A portion of the outer cylinder facing the second incandescent body is provided with a window made of a heat ray transparent material.
) or (3). (5) Claim No. (1) that the combustion chamber has a flat shape.
The oil combustor described in any one of paragraphs (2), (3), and (4).