JPS59142307A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To make it possible to suppress the rise-up of flame and to safely use the titled burner by providing a flame adjusting cylinder which completely blocks the upper end of the combustion cylinder and is provided on the peripheral side surface with a plurality of through holes, at the upper part of the outer cylinder. CONSTITUTION:The upper end surface 12 of the flame adjusting cylinder 11 is completely blocked, and a plurality of through holes 14 are formed on the peripheral side surface 13. Hence, a fuel evaporated from a wick evaporating part 10a, is burnt in the combustion chamber 5 and converted into exhaust gas. The fuel rises up by a drafting but comes into collision with the upper end surface 12, and then is extended in the lateral direction. Accordingly, in a case where, for example, the quantity of combustion is abruptly changed from the lower position to the higher position, the quantity of evaporating the fuel from a wick evaporating part 10a, abruptly increases. However, since the draft dispersed in the lateral direction as indicated by arrows by the flame adjusting cylinder 11. Hence, rising flame is merely observed slightly in the lateral direction. Any large rising flame is never observed in the directly above direction of the combustion cylinder 1, and therefore, the operator harbors almost no feeling for danger.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wick vaporization type liquid fuel combustion device used in oil stoves, oil stoves, and the like.

Conventional Structure and Problems Conventionally, the combustion tube of this type of liquid fuel combustion device, in which liquid fuel is sucked up by the capillary action of the lamp wick, vaporized at the tip, and burned, is as shown in Fig. 1. Many have an opening 16 almost directly above the combustion chamber 6. In this case, a draft force acts on the combustion exhaust gas directly above the combustion chamber 6 as shown by the arrow. Therefore, for example, if the combustion amount is suddenly changed from the lowest position to the highest position of the adjustment range,
Since the amount of fuel vaporized from the wick vaporizer 10a increases rapidly, a large standing flame F is generated from the opening 16 directly above the combustion chamber 6.
In extreme cases, the flame may extend beyond the top plate above the combustion tube 1, and the flame may protrude outside the upper front of the appliance.This is a safety concern for the user. There was a problem. In addition, when an earthquake-resistant automatic fire extinguishing system or the like is used to momentarily lower the wick to extinguish the fire, air corresponding to the volume of the lowered wick is suddenly forced into the combustion chamber 5, so that instantaneous A standing flame was seen. Furthermore, similar standing flames were observed when the cartridge tank (auxiliary tank) was replaced while the combustor was still burning. In order to prevent such a flare-up, it is necessary to eliminate sudden pressure changes within the tank, and conventionally, a pressure equalizing valve 16 or the like has been provided in a part of the tank. This pressure equalizing valve 16 normally shuts off the inside of the tank and the outside air, and only when the tank internal pressure increases suddenly,
It opens instantaneously in the direction of the arrow to smooth out the difference between the internal pressure of the tank and the external pressure, thereby reducing pressure fluctuations in the combustion chamber and preventing flare-ups, but the structure is complex. Manufacturing was time consuming and costly.゛Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and it suppresses the flames that occur when changing the combustion amount, instantaneously extinguishing fire, or replacing the cartridge tank, thereby improving safety. The purpose is to provide a liquid fuel combustion device that can be used for.

Structure of the Invention In order to achieve this object, the present invention provides a structure in which a combustion tube is provided with a
The upper end surface of the combustion tube is completely closed off, and a straightened tube is provided with a plurality of through holes bored on the circumferential side. With this configuration, the combustion exhaust gas first hits the upper end surface of the flame regulating tube, then spreads laterally and is emitted from the through holes drilled in the peripheral side surface. In other words, the draft force acting directly upward is changed to the lateral direction by the straightening tube. Therefore, when the combustion amount is suddenly changed from a low position to a high position in the adjustment range, even if a standing flame occurs, it can spread laterally. In addition, if a larger standing flame is generated (for example, when the combustion amount is changed from the lowest position to the highest position in the adjustment range),
Since the flame is engulfed toward the top center of the cylindrical shape, it is possible to prevent a large flame from rising directly above as in the conventional case. Furthermore, the same effect can be obtained against standing flames that occur due to rapid fluctuations in tank internal pressure during emergency fire extinguishing or cartridge tank replacement.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a combustion tube, and an inner flame tube 2 having a large number of air holes, an outer flame tube A3, and an outer flame tube A4 are arranged substantially concentrically. Reference numeral 3' denotes an outer flame tube B made of a lath mesh, a punched plate, etc., which is connected above the outer flame tube A3. 4' is an outer cylinder B made of heat-resistant tempered glass or the like. A combustion chamber 6 is formed between the inner flame tube 2 and the outer flame tube AI B+ 313'. Reference numeral 6 designates an inner core cylinder, and numeral 7 represents an outer core cylinder. Above these, an inner flame plate 8 and an outer flame plate 9 are formed, respectively, and an inner flame cylinder 2 and an outer flame cylinder A3 are placed thereon, respectively. A lamp wick 10 is set between the inner wick tube 6 and the outer wick tube 7 so as to be movable up and down.
A is exposed in the combustion chamber, and the fuel is vaporized and burned. 11 is a straightening cylinder provided on the upper part of the outer cylinder, and its upper end surface 1
2 is completely closed, and the circumferential side 13 has a plurality of through holes.

In the above configuration, since the upper end surface 12 of the straightening tube 11 is completely closed and a plurality of through holes 14 are bored in the circumferential side surface 13,
The fuel vaporized from the wick vaporizer 10a is burned in the combustion chamber 6 and becomes exhaust gas.1. Although it increases due to draft force,
It collides with the upper end surface 12 and then spreads laterally. Therefore, for example, when the combustion amount is suddenly changed from a low position to a high position in the adjustment range, although the amount of fuel vaporized from the wick vaporizer 10a increases rapidly, the draft force is Because it is spread horizontally, the standing flame Fb
There is only a slight flame visible in the lateral direction, and there is no large standing flame directly above the combustion tube as in the conventional case, so there is almost no sense of danger.

Figure 3 shows an even more severe situation, for example, when the combustion amount is suddenly changed from the lowest position to the highest position of the adjustment range, resulting in a large standing flame. The state of one embodiment of the present invention is shown. In the conventional type, since the opening 15 is located almost directly above the combustion chamber 6, the draft force acts upward. In this case, the pressure in the part directly above the combustion tube is negative because it is pulled by the draft force. However, because the upward draft force was strong, the flames were drawn to the center and converged above the combustion tube to form a large flame Fa, which was observed to protrude upwards from the top plate 18, which is a part of the exterior case. . On the other hand, in the embodiment of the present invention, the draft force is spread laterally by the straightening tube 11, so that the flame is once spread laterally and then formed upward. In this case, the part 17b directly above the combustion tube is pulled by the draft force and becomes a negative pressure, so the flame Fb that was trying to extend upward is drawn toward the center directly above the combustion tube, and the flame extends to the vicinity of the top plate 18. never formed. In addition, even if the wick is momentarily lowered to extinguish the light using an earthquake-resistant automatic fire extinguishing device or the like, or if the cartridge tank is replaced while the combustor is still burning, the air pushed into the combustion chamber 6 will be absorbed into the through hole 14. Since the flame spreads laterally, the instantaneous flare-up at this time can be considerably reduced. Therefore, the pressure equalizing valve 16, which was conventionally provided in a part of the tank to reduce sudden pressure changes within the tank, is no longer necessary from a safety standpoint, and the manufacturing effort and cost are also reduced.

Effects of the Invention As described above, according to the liquid fuel combustion apparatus of the present invention, the upper end surface of the combustion tube is completely closed off at the upper part of the outer cylinder, and the arranged cylinder with a plurality of through holes bored in the peripheral side is provided. , when the draft force is changed in the lateral direction, for example when the combustion amount is suddenly changed from the lowest position to the highest position of the adjustment range, when an emergency fire is extinguished, or when the cartridge tank is replaced while combustion continues. It is possible to spread the standing flame laterally, suppressing the large upward standing flame that has conventionally been seen, and it is safe without giving a sense of danger to the user. Furthermore, pressure equalizing valves and the like, which were conventionally provided in a part of the tank, are no longer necessary, and the manufacturing effort and costs are also reduced.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a combustion tube of a conventional liquid fuel combustion device, FIG. 2 is a partial sectional view of a combustion tube of a liquid fuel combustion device according to an embodiment of the present invention, and FIG. 3 is a partial sectional view of a combustion tube of a conventional liquid fuel combustion device. FIG. 1... Combustion tube, 2... Inner flame tube, 3...
...Outer flame tube, 5... Combustion chamber, 6...
・Inner wick tube, end...Outer wick tube, 10...Light wick, 11...Arrangement tube, 14...Through hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A combustion tube is formed by sequentially arranging an inner flame tube, an outer flame tube, and an outer tube having a large number of small holes in a substantially concentric circle, and a combustion chamber is formed between the inner flame tube and the outer flame tube. A liquid fuel having a configuration in which the vaporizing part of the lamp wick is exposed and burned, and a flame regulating tube is provided in the upper part of the outer tube, the upper end surface of the combustion tube is completely closed, and a plurality of through holes are bored in the peripheral side. Combustion device.