JPS6387509A - Wick type liquid fuel burner - Google Patents

Abstract

PURPOSE:To obtain a stable combustion by arranging internal and external cylinders having a plurality of vent holes and a glass cylinder in a triple-coaxial manner, turning up a wick into a combustion chamber formed between both flame cylinders, and expanding or contracting the combustion chamber depending on the level of combustion. CONSTITUTION:Combustion is started with air from vent holes 10 and 14 by the ignition of a wick 5. Heat entering the wick 5 and that leaving it are balanced and a steady combustion occurs. When the wick 5 is extended, an evaporating fuel increases and a combustion zone rises upward. The temperatures of a fire grate 17 and a heat pipe 18 do not rise and the quantity of evaporation at the time of high combustion is maintained. An unburnt gas forms a secondary flame between an external cylinder top plate 6 and a flame diffusion cylinder 13 to thereby complete the combustion. At the low combustion time, a shaft 21, pinions 22 and 23, racks 9 and 24 are moved by the rotation of a dial 20 and the rack 9 is greatly lowered by the large pinion 22 and an inside cylinder 1 is greatly lowered. As a result, the temperature of the wick 5 increases but by the heat radiation of the heat pipe 18 the level of combustion in accordance with the exposure of the wick 5 can be held.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) This invention relates to a wick-type liquid fuel combustion device that is frequently used for home heating and the like.

(Prior art) Conventionally, an inner flame tube and an outer flame tube are arranged coaxially, a core is exposed in the space formed by the inner flame tube and an outer flame tube, and a flame expansion tube is provided above the inner flame tube. There is a wick type liquid fuel combustion device.

In such a combustion device, during steady combustion, secondary flames are generated in the space formed by the outer flame tube top plate and the flare tube, and secondary flames are generated from the vents near the outer flame tube top plate and from the vent holes in the inner flame tube top plate. The balance was maintained so that combustion was promoted by secondary air and stable combustion could be achieved. However, the function of adjusting the firepower was not sufficient, and the firepower could only be adjusted by about 10 mm relative to the rated combustion amount, which was enough to adjust the standing flame after ignition.

If you lower the wick toward the wick guide to reduce the heating power, the amount of evaporation of oil will decrease and the heating power will decrease, but after a while the combustion area will move to the bottom of the combustion chamber. , the temperature of the wick rises again and the amount of evaporation of oil increases.For this reason, it is not possible to reduce the firepower unless the wick is lowered extremely.Therefore, it is difficult to adjust the firepower smoothly, and it is difficult to adjust the firepower. The range is also narrow.

Additionally, if the wick is rapidly exposed from the wick guide tube in order to increase the firepower, the wick containing a large amount of fuel will be introduced into the high temperature atmosphere, which will rapidly accelerate the evaporation of the oil. As a result, combustion within the combustion chamber cannot be stopped and an excessive flame may be generated, resulting in an unfavorable safety situation.

Therefore, if you lower the wick extremely and reduce the firepower,
As the amount of combustion decreases, the secondary flame moves downward in the combustion chamber. The secondary flame that has moved into the combustion chamber is gradually combusted by the air flowing in from the vents of the inner and outer flame tubes, but the tip of the secondary flame is burned by the air that enters from the extinguished vents and the wall of the inner flame tube. There was a problem in that the combustion gas during the cooling and reaction was discharged as it was, and a large amount of -carbon oxide was generated.

(Problems to be Solved by the Invention) As mentioned above, the conventional wick type liquid fuel combustion device has difficulty in smoothly adjusting the firepower, has a narrow range of firepower adjustment, and contains large amounts of gases such as carbon monoxide. There was a problem.

This invention was made to solve the above problems, and provides a wick-type liquid fuel combustion device that allows easy adjustment of thermal power, has a wide thermal power adjustment range, and can suppress the generation of gases such as carbon monoxide. It is intended to.

[Structure of the Invention (Means and Effects for Solving the Problems)] The liquid fuel combustion device of the present invention comprises an inner flame tube and an outer flame tube, each having a plurality of ventilation holes, and an outer flame tube and a glass tube coaxially connected to each other. It has a structure in which the wick is exposed to the combustion chamber formed by the inner and outer flame tubes to perform combustion, and the inner flame tube is moved up and down in conjunction with a wick height adjustment mechanism.

With this configuration, during strong twist firing when the inner flame tube is at the top end, secondary flame is generated by air flowing into the space between the outer flame tube top plate and the flame expansion tube from the outer flame tube top plate and the inner flame tube top plate. It is formed and burns steadily. In addition, during weak combustion, the inner flame tube moves downwards in the combustion chamber in conjunction with the wick height adjustment mechanism, so the outer flame tube, inner flame tube, and flare tube can form a combustion chamber according to the amount of combustion, increasing the residence time. This allows for stable combustion.

At this time, the reaction zone of the secondary flame formed between the outer flame tube and the flare tube is pushed toward the inner flame tube side by a large amount of air flowing in from the top of the outer flame tube, but the inner flame tube wall expands. Since it does not exist downstream of the flame tube, it is possible to prevent carbon monoxide from being generated due to cooling.

Therefore, even during weak combustion, no carbon monoxide is generated, and the heating power can be adjusted according to the height of the wick.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is an inner flame tube, 2 is an outer flame tube, and 3 is an outer tube that covers the outer periphery of the lower part of the outer flame tube 2. These inner flame tube 1, outer flame tube 2, and outer flame tube 3 are arranged coaxially, and a combustion chamber 4 is formed between the inner flame tube 1 and the outer flame tube 2, and a wick 5 is exposed at the bottom of the combustion chamber 4. Fuel is constantly supplied into the combustion chamber 4.

Further, an outer flame tube top plate 6 is provided on the upper part of the outer flame tube 2, and holds a glass tube 7 between it and the upper part of the outer flame tube 3.

The inner flame cylinder 1 is formed continuously to the inside of the core storage part 8, and a rack 9 is formed at the lower end thereof. The inner flame tube 1 has ventilation holes 10 arranged in a staggered manner, and an inner flame tube top plate 12 having the ventilation holes 11 is provided above the inner flame tube top plate 12, and a flame expansion tube 13 is attached above the top plate 12. Ventilation holes 14 are formed in an array in the outer flame cylinder 2, and the intervals are formed closer in the upper part than in the lower part.

The above is the configuration of the combustion tube 15, which is placed on a fire pan 17 which is a part of the wick and guide tube 16.

A heat pipe 18 as a temperature control means is wound around the bottom of this fire tray 17 to keep the temperature of the fire tray 17 almost constant and adjust the temperature to an appropriate level according to the amount of exposure of the wick 5. Care has been taken to ensure that the amount of combustion is obtained.

The lead S is held by a lead holder 19 and is moved up and down within the lead storage portion 8 by rotation of a dial 20. That is, the dial 20 is fixed to one end of a shaft 21, and this shaft 21 is provided with pinions 22 and 23 of different diameters, which mesh with the rack 9 of the inner flame tube 1 and the rack 24 formed on the core holder 19, respectively. ing. In addition, a seal member 2 is provided at the portion where the shaft 21 passes through the burner basket 25.
6 is provided, making it an airtight structure.

In the liquid fuel combustion device configured as described above, when the wick 5 is ignited by the ignition device (not shown), the inner and outer flame tubes 1
, 2 ventilation holes 10, 1. Combustion is started by air flowing in from the cows. The wick 5 is heated by this combustion heat, and the amount of evaporation of the fuel gradually increases. In this way, the core 5
A steady combustion state occurs when the amount of heat entering the wick 5 and the amount of heat released by evaporation from the wick 5 are balanced.

Figure 1 shows the situation during strong twist firing.During strong twist firing, by increasing the exposed area of the wick 5 as shown in the figure, the amount of fuel evaporation is increased, and the fuel becomes thicker near the wick 5, which increases the combustion area. moves upward.

As a result, the temperature of the large plate 17 near the core 5 does not rise much, and the amount of heat dissipated from the heat pipe 18 is also reduced.
The temperature rise in No. 7 can be suppressed and the amount of evaporation during strong twist firing can be maintained.

On the other hand, the unburnt gas rises through the space between the inner flame tube 1 and the outer flame tube 2, and is sequentially combusted at each stage by the air flowing in from the respective ventilation holes 10 and 11, and finally A secondary flame is formed in the space created by the flame tube top plate 6 and the flame expansion tube 13 to complete combustion.

During weak combustion as shown in FIG. 2, the dial 20 is rotated counterclockwise to set the wick 5 at a predetermined height. This rotation of the dial 20 is transmitted via the shaft 21 to the pinions 22, 23, which engage the racks 9, 24 to lower them.

At this time, since the pinion 22 has a larger diameter than the pinion 23, the rack 9 descends more than the rack 24. That is, the inner flame cylinder 1 is lowered to a greater extent than the core 5.

In this way, the exposed area of the wick 5 and the size of the combustion chamber 4 are reduced to reduce the amount of combustion.

At this time, a flammable mixture is generated near the wick 5, and a flame is formed near the wick 5. This increases the temperature of the core 5, but since the heat pipe 18 wrapped around the large plate 17 starts dissipating heat, the amount of evaporation increases only by the increase in the amount of heat input by radiation, and although there is a slight increase, the temperature of the core 5 increases. The amount of combustion can be maintained according to the amount of exposure.

On the other hand, the unburned gas rises in the space between the inner and outer flame cylinders 1 and 2, and is combusted at each stage by the air flowing in from the respective vent holes 10, 14-. In this way, the secondary flame that finally completes combustion falls into the combustion chamber 4, and a secondary flame is formed between the flare tube 13 and the outer flame tube 2.

Since this secondary flame is not in the flow flowing in from the upper part of the outer flame tube 2, it can be attributed to the cooling effect by the wall of the inner flame tube 1.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications as long as t'a' is not changed.

[Effects of the Invention] According to the present invention, it is possible to provide a wick-type liquid fuel combustion device that allows easy adjustment of thermal power, has a wide thermal power adjustment range, and can suppress the generation of gases such as carbon monoxide.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic diagrams of an embodiment of the present invention, with FIG. 1 showing the state during hard twist firing, and FIG.
The figure shows the state during weak combustion. 1... Inner flame tube 2... Outer flame tube 3... Outer tube
4... Combustion chamber 5... Core 6...
・Outer flame tube top plate 7...Glass tube 8...Core storage section 9...Rack 10...Vent hole 11...Vent hole 12...Inner flame tube top plate 13...
・Flame tube 14...Vent hole 15...Combustion tube
16... Core guide cylinder 17... Projection plate 18
... Heat pipe 19 ... Core holder 20 ... Dial 21 ... Shafts 22, 23 ... Pinion 24 ...
・Rack 25... Burner basket rack 26...
Seal member

Claims (3)

[Claims] (1) An inner flame tube and an outer flame tube each having a plurality of ventilation holes, an outer tube that covers the lower outer periphery of the outer flame tube, and a glass provided on the upper part of the outer flame tube and that covers the upper outer periphery of the outer flame tube. In the wick-type liquid fuel combustion device, the inner flame tube is arranged coaxially with the inner flame tube, and the wick is exposed in the combustion chamber formed by the inner and outer flame tubes to perform combustion. A wick-type liquid fuel combustion device that moves up and down in conjunction with each other. (2) The wick liquid fuel combustion apparatus according to claim 1, wherein the wick is housed in a wick guide tube, and the wick guide tube is provided with a wick temperature control means. (3) The wick-type liquid fuel combustion apparatus according to claim 1 or 2, wherein the inner flame cylinder is moved up and down significantly compared to the wick.