JPS59202306A - Liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To prevent formation of excess large rise flame, and production of odor, soot, etc., by a method wherein a flame uniformizing cylinder which has the upper end surface of a combustion cylinder, completely blocked up, and a peripheral side having a plurality of through-holes, is mounted, and a pressure uniformizing plate, blocking up the upper end of an air passage formed by an outer cylinder and an outer flame cylinder, is provided. CONSTITUTION:A wick 10 is vertically movably set between a wick inner cylinder 6 and a wick outer cylinder 7, and an evaporating part 10a is exposed in a combustion chamber to evaporate and burn the fuel. A flame uniformizing cylinder 11, mounted to the upper part of an outer cylinder, formed such that its upper end surface 12 is completely blocked up, a peripheral side 13 has through-holes 14 bored therein and the upper part of the peripheral side 13 has oblong through-holes 15. A pressure uniformizing plate 17 is provided for blocking up in a given manner the upper end of an air passage 16 formed by an outer cylinder 4' and an outer flame cylinder 3'. This prevents formation of an excess large rise flame, and reduces yielding of noxious substances, such as odor, soot, carbon monoxide, resulting in maintenance of clean combustion and in improvement of safety.

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, which sucks up liquid fuel by the capillary action of the lamp wick and vaporizes it from its tip and burns it, is as shown in Figure 1. Many have an opening 5 a 1,1 almost directly above the combustion chamber 5. In this case, a draft force acts on the combustion exhaust gas in the direction directly above the combustion chamber 6 as shown by the arrow. Therefore, for example, when the combustion amount is suddenly changed from the lowest position to the highest position in the adjustment range, the amount of fuel vaporized from the wick vaporizer 10a increases rapidly, and an excessive amount of fuel is generated from the opening 5a directly above the combustion chamber 5. Standing Flame F
In extreme cases, the flame may extend beyond the exterior top plate above the combustion tube 1, or the flame may protrude outside the top of the front of the appliance, causing safety hazards such as burns and fire during use. There was a problem. In addition, when the fire is extinguished by momentarily lowering the wick using an earthquake-resistant automatic fire extinguishing system, air corresponding to the volume of the wick being lowered is suddenly pushed into the combustion chamber 5, causing a momentary rise from the opening 6a. Flames were visible.

Furthermore, similar standing flames were observed when the cartridge tank (auxiliary tank) was replaced for refueling during combustion. 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 18 or the like has been provided in a part of the tank.

This pressure equalizing valve 18 normally shuts off the inside of the tank and the outside air, and only when the inside pressure of the tank suddenly increases, it momentarily opens in the direction of the arrow - to eliminate the difference between the inside pressure of the tank and the outside pressure. Although this has the function of reducing pressure fluctuations in the combustion chamber and preventing flare-ups, the structure is complicated, and manufacturing is time-consuming and costly.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and suppresses excessive flames that occur when changing the combustion amount, instantaneous extinguishing, or replacing the cartridge tank. Along with the odor and soot.

- The purpose is to provide a complete liquid fuel combustion device that maintains clean combustion by reducing the generation of harmful substances such as carbon oxide, and has excellent safety.

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 of the combustion tube is completely closed, and the flame regulating tube is provided with a plurality of through holes in the circumferential side, and a pressure regulating plate is provided that closes the upper end of the air passage formed between the outer tube and the outer flame tube. ing. With this configuration, the combustion exhaust gas once hits the upper end surface of the flame regulating cylinder, and then spreads laterally and is discharged from the through hole bored in the peripheral side surface. In other words, the draft force that was acting directly upward is changed to the lateral direction by the flame regulating 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 be spread laterally. Furthermore, if an excessive flame noise is generated (for example, when the combustion amount is changed from the lowest position to the highest position in the adjustment range), the flame will be engulfed in the center directly above the flame regulating tube. Excessive standing flames in the direction can be completely prevented.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 when cartridge tanks are replaced. On the other hand, during normal combustion, an appropriate amount of air is supplied to the combustion chamber by a pressure regulating plate that blocks the upper end of the air passage in a predetermined manner, which improves the quality of combustion in the combustion chamber and eliminates odors, soot, and carbon oxides. It is possible to completely reduce the generation of harmful substances such as 0 and maintain clean combustion.Description of an Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 2, 1 is a combustion tube, an inner flame tube 2 having a large number of air holes, an outer flame tube A3, and an outer tube A4 are arranged approximately concentrically, and 03' is made of laths, punched plates, etc. Reference numeral 04' in the outer flame cylinder B connected above the outer flame cylinder A3 is an outer cylinder B made of heat-resistant glass or the like. A combustion chamber 6 is formed between the inner flame tube 2 and the outer flame tube A'B3, 3'. 6
Reference numeral denotes a core inner cylinder, and numeral 7 denotes a core outer cylinder. Above these, an inner flame plate 8 and an outer flame plate 9 are completely formed, respectively, and an inner flame cylinder 2 and an outer flame cylinder 3 are placed thereon, respectively. There is a wick 1o between the inner wick tube 6 and the outer wick tube 7.
is set to be movable up and down, and is exposed inside the combustion chamber of the external vaporizing section 10ai to vaporize and burn the fuel. Reference numeral 11 denotes a flame regulating tube provided at the upper part of the outer cylinder, whose upper end surface 12 is completely closed, and a through hole 14 is bored in the circumferential side surface 13, and an oblong through hole 16 is bored in the upper part of the circumferential side surface 13. A pressure regulating plate 17 is provided which closes a predetermined upper end of an air passage 16 formed between the outer cylinder B4' and the outer flame cylinder B3'.

In the above configuration, since the upper end surface 12 of the flame regulating tube 11 is completely closed and the oblong through hole 15 is bored in the upper part of the circumferential side surface 13, the fuel vaporized from the wick vaporizing section 10a is transferred to the combustion chamber 6. The exhaust gas is combusted and becomes exhaust gas, which rises due to the draft force, collides with the upper end surface 12, and then spreads laterally. Therefore, for example, when the combustion amount is suddenly changed from the low position to the high position of the adjustment range, the amount of fuel vaporized from the lamp wick vaporization section 10a increases rapidly, but the draft force is As long as the flames are dispersed, there will be no large standing flame directly above the combustion tube as in the conventional case, and there is no sense of danger at all. 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 in the adjustment range, resulting in a large standing flame. This shows the state of one embodiment of the present invention, and the conventional one has an opening 6a almost directly above the combustion chamber 5.
Therefore, the draft force acts upward.8 In this case, the portion 19a directly above the combustion tube is pulled by the draft force, so that the pressure is negative. However, because the upward draft force is strong, the flames are drawn to the center and converged above the combustion tube, becoming a large flame Fa, which spreads to the top plate 2, which is a part of the exterior case.
0 A dangerous phenomenon of upward protrusion occurred.In contrast, in one embodiment of the present invention, the draft force is spread laterally by the flame regulating tube 11, so the flame is once spread laterally. After that, it is formed upward. At this time, the central portion 19b directly above the combustion tube is pulled by the draft force and becomes a negative pressure, so the flame Fb that was about to extend upward is drawn toward the center directly above the combustion tube, and the flame is formed up to the vicinity of the top plate 2o. The through holes drilled in the circumferential side surface 13 of the flame regulating tube 11 will be described below. FIG.
In this case, a vertically elongated through hole 14 is drilled all the way to the top, but in this case, the flame will be divided at many places between the through holes 14, that is, by the many divided parts 14a, and the flame will be disturbed and lift As a result, unburned gas is discharged outside the combustion system, producing a large amount of toxic components such as carbon monoxide and odors. The same drawback as described above occurred when a circular hole was bored.

FIG. 6 shows an embodiment of the present invention.
Since the horizontally elongated through hole 15 is provided in the upper part of 3, the flame passes through the horizontally elongated through hole 15 when the flame is standing in the horizontal direction, and the flame is not divided at many places. Turbulence and lift phenomena are largely reduced, carbon monoxide and odor are virtually eliminated, and clean combustion can be maintained.

In addition, even if the fire is extinguished by lowering the wick momentarily using an earthquake-resistant automatic fire extinguishing system, or if the cartridge tank is replaced while the combustor is still burning, the air pushed into the combustion chamber 5 will be released from the through hole 16. Since it can spread laterally, the instantaneous flare-up at this time can be considerably reduced. Therefore, the pressure equalizing valve 18, 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. Next, normal combustion will be explained. 6th
Figure A shows a case in which the upper end of the air passage 16 formed between the outer cylinder B4' and the outer flame cylinder B3' is completely open without being blocked, and the air passage 1
Most of the air passes upwards because the pressure drop in 6 is too small.
The amount of air supplied to the combustion chamber 6 was insufficient, resulting in incomplete combustion, producing odor, carbon oxide, etc., and causing cracks such as uneven red heat in the outer flame tube B3'.

FIG. 6B shows a case where the upper end of the air passage 16 is completely blocked, and the pressure drop in the air passage is excessive, and the amount of air supplied to the combustion chamber 5 is excessive, causing air to flow outside of the combustion chamber 5. laminar flow 5f
and yellow flame is generated in the combustion chamber 6, and the outer flame tube B3'
However, the present invention has the drawback that the red heat temperature of the outer flame tube B3' decreases because the flame separates from the outer flame tube B3'.
By providing a pressure regulating plate 17 that closes a predetermined upper end of the air passage 16 formed between the air passages 16 and 17 to adjust the pressure loss of the air passage 16, an appropriate amount of air is supplied to the combustion chamber. It is possible to qualitatively improve the combustion in the combustion chamber, reduce the generation of harmful substances such as odor, soot, and carbon oxide, maintain clean combustion, and maintain the red-hot temperature of the outer flame tube B3' at a high temperature.

As can be seen from the effects of the invention, the liquid fuel combustion device of the present invention has a flame regulating device in the upper part of the outer cylinder of the combustion cylinder, which completely closes the upper end surface of the combustion cylinder and has a plurality of through holes in the peripheral side. By providing a cylinder and a pressure regulating plate that blocks the upper end of the air passage formed between the outer cylinder and the outer flame cylinder, the draft force can be changed in the lateral direction, for example, the combustion amount can be suddenly changed from the lowest position to the highest position. It is possible to suppress the excessive upward flame that has been common in the past by spreading the excessive flame that occurs when the cartridge tank is replaced laterally during emergency fire extinguishing or when replacing the cartridge tank during combustion. It also prevents combustion turbulence and lift phenomenon, and improves the quality of combustion by supplying an appropriate amount of air to the combustion chamber during normal combustion, reducing odor, soot, and 6
- It reduces the generation of harmful substances such as carbon oxide, maintains clean combustion with high red heat, and provides excellent safety.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a combustion tube of a conventional liquid fuel combustion device, FIG. 2 is a partial cross-section of a combustion tube of a liquid fuel combustion device according to an embodiment of the present invention, and FIG. FIGS. 4, 5, and 6A and 6B are explanatory diagrams of the same operation. 1... Combustion tube, 2... Inner flame tube, 3...
...Outer flame tube A, 3'...Outer flame tube B, 4...
...Outer tube A, 4'...Outer tube B, 6...Combustion chamber, 10...Light wick, 11...Flame regulating tube, 1
6... Horizontally oblong through hole, 16... Air passage, 17... Pressure regulating plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure N4 Figure 5 Figure 6

Claims (2)

[Claims] (1) 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 manner, and a combustion chamber formed between the inner flame tube and the outer flame tube. The vaporizing part of the lamp wick is completely exposed for combustion, and a flame regulating tube is provided on 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 circumferential side. A liquid fuel combustion device provided with a pressure regulating plate that closes a predetermined upper end of an air passage formed between a cylinder and the outer flame cylinder. (2) The liquid fuel combustion device 0 according to claim 1, wherein the flame regulating tube has a horizontally elongated through hole in the upper part of the circumferential side.