JPH0260922B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an oil combustor using a straight wick and a combustion tube.

Conventional structure and its problems Oil burners using a straight wick and combustion tube are suitable as home heaters because of their short depth and small installation space indoors, but they are not stable from ignition. The drawbacks were that the start-up process leading to combustion took a long time and had a strong odor.

This is because after the flame ignites at the tip of the wick and spreads along the entire length of the wick, the flame concentrates in the longitudinal center where the passage resistance is lowest, which delays the temperature rise near both ends of the wick and reduces the amount of vaporized gas generated. This is because it takes a long time to reach the amount of vaporized gas generated during stable combustion, and because the vaporized gas is temporarily concentrated in the center, causing incomplete combustion due to lack of air.

OBJECTS OF THE INVENTION The present invention aims to eliminate these drawbacks, and provides a combustor that has a short start-up time and generates less odor and CO.

Structure of the Invention In order to achieve this object, the present invention forms a combustion chamber by a pair of perforated plates having a large number of small holes in front and back, with a horizontally long linear lamp wick positioned between them. A combustor in which a group of small holes are provided at one or both ends of the perforated plate facing both ends of the wick at a closer interval than the groups of small holes in other parts of the same height to strengthen the flame holding ability. It is.

In the above configuration, when the tip of the wick is ignited and the flame propagates along the entire length of the wick, a flame is formed in the densely arranged small holes at both ends of the perforated plate (flame holding), thereby promoting a rise in temperature at both ends of the wick. However, by increasing the vaporization rise speed, it is possible to suppress the concentration of flame in the center and shorten the combustion rise time.

DESCRIPTION OF EMBODIMENTS Next, embodiments of the present invention will be described based on FIGS. 1 and 2.

In FIG. 1, reference numeral 1 denotes a linear lamp wick whose lower end is immersed in the fuel in the fuel tank, and whose upper end is exposed in the combustion chamber, although it is not shown in the figure. 2 is a front perforated plate having a large number of small holes 2a; 3 is a large number of small holes 3a;
This is a rear perforated plate having a rear perforated plate, and a combustion chamber is formed in the gap between the rear perforated plate and the front perforated plate 2. Reference numeral 4 denotes an incandescent plate that is continuously provided on the front perforated plate 2, and the incandescent plate 4 may be integrated with the front perforated plate 2. Reference numeral 5 designates a transparent body provided to emit radiant heat generated from the incandescent plate 4 to the front surface, 6 a front outer body that covers the front surface, and 7 a rear outer body that covers the rear surface.

In Figs. 2 and 3, 2b is a small hole group consisting of a large number of small holes provided near the center of the perforated plates 2 and 3 facing the center of the horizontally long linear lamp wick 1, and 2c is a group of small holes formed in the vicinity of the center of the horizontally long linear lamp wick 1. Perforated plates 2 and 3 facing both ends of the lamp wick 1
There are small hole groups arranged at both ends of the small hole group 2b more densely than the small hole group 2b.

In the above configuration, when the tip of the lamp wick 1 is ignited, the flame propagates in the longitudinal direction on the lamp wick, and the fuel contained in the lamp wick 1 is vaporized by the heat, and combustion continues.
The amount of vaporized fuel gas gradually increases, and the lower part of the perforated plate is heated, and a flame is formed in the small holes of the perforated plate (flame holding), which becomes a heat source for vaporizing the fuel in the wick. In this process, in a linear combustor, the flame is concentrated in the center because the flow path resistance is lowest in the center, and the temperature rises faster than at both ends, so the draft force generated by the combustion heat becomes large. , the flame tends to concentrate more and more in the center. As a result, the flame is cooled in the upper part of the combustion tube where the temperature is low, and odor due to incomplete combustion is caused by partial lack of air.
It is a cause of CO generation. In addition, the concentration of the flame delays the temperature rise at both ends, and it takes a long time for uniform combustion to occur throughout.

According to the structure of the present invention, since the small holes of the perforated plates 2 and 3 facing both ends of the lamp wick 1 are arranged densely, the flame holding ability of both ends is stronger and more stable than that of the center part. Since the number of small holes is large, the number of flame holding is greater than that in the center, and the heat supply capacity to the wick 1 is greater, so the rising speed at both ends of the wick is also faster. In other words, if the small holes are arranged in a dense arrangement, even if the flame holding of some small holes disappears, the flame holding of the neighboring small holes will become the ignition source and re-ignite, and the flame holding will be less than that of the small hole group 2b in the center. Since the number of small holes is large, the flame holding of the small hole group 2c has a large amount of heat, and the temperature of the flame holding part becomes high, and the combustion speed increases, so that stable flame holding can be obtained.

By strengthening and stabilizing the flame holding at both ends of this perforated plate and increasing the amount of heat, the rate of vaporization at both ends of the wick is faster than at the center, and the rate of increase in draft force is almost the same as at the center. This can prevent flame concentration. Experiments have shown that if the flame holding power at both ends of the perforated plate becomes excessive, the flame may rise first at both ends of the wick and slightly later at the center; It was found that the amount generated was small. Further, although the effect is greater when the small hole group 2c is provided on both the front perforated plate 2 and the rear perforated plate 3, the effect can be obtained even if it is provided on either one.

Furthermore, during steady combustion, heat dissipates from the side walls at both ends of the combustion chamber, and the amount of vaporized gas from the wick tends to decrease compared to the center, but according to the configuration of the present invention, the amount of heat at both ends increases. This has the effect of supplementing the amount of heat dissipated, making it possible to obtain a uniform amount of vaporization.

Effects of the Invention As explained above, according to the combustor of the present invention,
This is because small hole groups are provided at one or both ends of a pair of perforated plates facing both ends of a horizontally long linear lamp wick at closer intervals than small hole groups in other parts of the same height. The following effects can be obtained.

(1) Less odor and less CO when ignited.

(2) The rise time from ignition to stable combustion is short.

(3) Uniform combustion can be obtained.

(4) In order to effectively utilize the entire width of the horizontally long linear lamp wick to achieve combustion, and to fully utilize the functions of both ends of the wick, the width of the front and rear perforated plates must also be made significantly larger than the wick. It can be made compact without

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view of a combustor showing one embodiment of the present invention, and FIGS. 2 and 3 are small hole layout diagrams of the combustor. 1... Lamp wick, 2... Front perforated plate, 3... Rear perforated plate, 2b... Central small hole portion, 2c... Small hole group at both ends.

Claims (1)

[Claims] 1. A combustion chamber is formed by a pair of perforated plates with a horizontally long linear lamp wick positioned between them and a large number of small holes provided in the front and rear, one of the perforated plates facing both ends of the lamp wick, Alternatively, a combustor has a group of small holes arranged at a closer interval on both ends of the other side than the groups of small holes in other parts of the same height to strengthen the flame holding ability.