JPS6255564B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention mainly relates to a liquid fuel that is used in an indoor heater, forcibly converts liquid fuel such as kerosene into vaporized gas, and mixes air into the vaporized gas in multiple stages to burn the liquid. It concerns a fuel combustor.

BACKGROUND ART A conventional liquid fuel combustion apparatus of this type is shown in FIG. 1 is a vaporizer having an electric heater 2, and a heat receiving part 3 is formed on the upper part. Reference numeral 5 denotes a pressure equalizing plate having a large number of small holes 6 formed therein, and is placed on the heat receiving section 3 .

Reference numeral 7 denotes a support tube connected to the side surface of the vaporized body 1, and an oil supply pipe 8 is located in the center of the support tube. One end of the oil supply pipe 8 opens into the vaporizer 1, and the other end is connected to a pump 9. 10 is a suction pipe. Reference numeral 11 denotes an inner flame cylinder having a large number of small holes 12, which is placed on the vaporizer 1, and has a cap 13 having a plurality of holes 14 and a flame expansion plate 15 connected thereto.
16 is a partition plate. 17 is an outer flame cylinder having a large number of small holes 18, and is placed on the vaporizer 1. 19
indicates an outer cylinder, and 20 indicates a flame.

After preheating the vaporized body 1 to 250 to 280°C by the electric heater 2, when liquid fuel is supplied from the pump 9 into the vaporized body 1 through the oil supply pipe 8, the vaporized gas passes through the small hole 6 of the pressure equalizing plate 5. It rises between the inner and outer flame tubes 11 and 17, and when it is ignited here, the inner and outer flame tubes 11 and 17
The air flowing in from the small holes 12 and 18 causes pore combustion, and a flame 20 is formed at the upper end.

During combustion, a temperature controller (not shown) fixed to the vaporized body 1 turns on and off electricity to the electric heater 2 to maintain the vaporized body 1 at a constant temperature.

Problems to be Solved by the Invention In such a liquid fuel combustion device, feedback of combustion heat to the vaporized body 1 is achieved by bringing the heat receiving part 3 of the vaporized body 1 close to or in contact with the inner and outer flame tubes 11 and 17. I'm going. However, the temperature at the lower ends of the inner and outer flame tubes 11 and 17 only rises to about 200°C during combustion, and there is a large amount of heat transfer loss to the heat receiving part 3, so that the heat feedback to the vaporized body 1 is insufficient. Unexpectedly, the time during which electricity is applied to the electric heater 2 becomes longer.

Therefore, there were problems such as high power consumption and large temperature changes in the vaporized body 1 itself, making it impossible to obtain stable fuel vaporization.

In the past, various attempts have been made to improve the heat feedback, such as providing a heat receiving part that is integrated with the vaporized body within the inner flame tube 11 and keeping the vaporized body 1 warm with a heat insulating material, but none of them have been sufficiently effective. It was difficult.

In addition, in this type of combustor, air flows in by natural draft through the many small holes provided between the inner and outer flame tubes, and vaporized gas from the vaporized body is mixed with this and flows down into the small holes. A pore combustion flame is formed sequentially.

If a stomatal combustion flame is not formed in a stable manner from the small holes at the bottom of the inner and outer flame tubes in the initial stage of ignition, unburnt vaporized gas and incomplete combustion gas will diffuse from the upper part between the inner and outer flame tubes, causing CO, Due to the generation of a large amount of odor etc., it also takes a long time for the entire pore combustion flame to be stably formed, and there are problems with indoor release of harmful components to the human body and rapid heating.

In conventional combustors, the temperature at the bottom of the inner flame tube and outer flame tube does not rise sufficiently during ignition, and the flame holding and air ratio are insufficient to stabilize the pore combustion flame in the small pores at the bottom. There are no measures such as optimal control. For this reason, the above-mentioned problem at the initial stage of ignition occurred.

The present invention solves such conventional problems,
A vaporizer that has an electric heater for preheating and has a ring-shaped vaporization chamber, an inner flame tube and an outer flame tube that are connected to this vaporizer and have a large number of small holes, and a flame tube located outside the outer flame tube. an oil supply pipe that opens into the vaporized body, and is located between the inner flame tube and the outer flame tube and faces the small holes of the inner flame tube and the outer flame tube with a gap, and is connected to the vaporized body. A heat receiving part integrally formed, a pressure equalizing plate located at the upper end opening of the heat receiving part and having a number of small holes for sending vaporized gas between the inner flame tube and the outer flame tube, and a pressure equalizing plate formed on the side wall of the heat receiving part. However, it consists of a plurality of small holes that send vaporized gas into the gaps between the heat receiving part and the small holes of the inner flame tube and the outer flame tube.

Effects The present invention saves power by directly heating the vaporized body by forming a stomatal combustion flame stably from the initial stage of ignition in the gap between the vaporized body and the inner flame tube and the outer flame tube with the above-described configuration. Furthermore, the generation of unburned vaporized gas, CO, and odor at the initial stage of ignition can be significantly reduced, and rapid heating performance can also be improved.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 shows an example of the same, and the same reference numerals as in FIG. 2 indicate the same parts.

A heat receiving section 3 is formed integrally with the vaporized body 1, and is located between the inner flame tube 11 and the outer flame tube 17.
A gap is formed between the small holes 12 and 18 of the heat receiving part 3, and a plurality of small holes 4 are provided in the side wall of the heat receiving part 3.

The vaporized gas generated in the vaporizer 1 having a ring-shaped vaporization chamber is sent out through the small hole 4 provided in the side wall of the heat receiving part 3 due to its volumetric expansion, and is sent out through the small hole 4 provided in the side wall of the heat receiving part 3 and the small hole in the outer flame cylinder 17. 18 and the gap between the heat receiving part 3 and the small hole 12 of the inner flame cylinder 11, the air is ignited there, mixes with the air flowing in from the small holes 12 and 18 by natural draft, and the air flows into the small hole 12 in the gap. , 18 to form a pore combustion flame and heat the heat receiving part 3. Further, vaporized gas is sent between the inner flame tube 11 and the outer flame tube 17 from the small holes 6 of the pressure equalizing plate 5, mixes with the air flowing in from the small holes 12 and 18, and sequentially forms a stomatal combustion flame. 20 and complete combustion. During combustion, the heat receiving part 3 itself is heated by the stomatal combustion flame that is formed in close contact with the small holes 12 and 18 facing the heat receiving part 3, which are always formed, so that the heat feedback to the entire vaporized body 1 is sufficiently performed. be exposed.

Therefore, after a certain period of ignition, the vaporized body 1 is maintained at about 280° C. only by combustion heat, and there is no need to energize the electric heater 2. In this manner, the present invention directly heats the vaporized material using the flame that is constantly formed during combustion, resulting in power savings and a stable vaporization state of the fuel.

Furthermore, the amount of feedback of combustion heat to the vaporized material is freely set so that the temperature of the vaporized material is maintained at an optimum value depending on the surface area of the heat receiving part and the amount of pore combustion formed by the small holes 12 and 18 here. be able to.

In addition, in the past, heat was only transferred from the inner and outer flame tubes to the vaporized body, and the amount of heat conduction tended to fluctuate due to variations in the dimensions and processing of this continuous part, but the present invention has a small Stable heat conduction is achieved because the flame directly heats the holes.

Furthermore, the entire vaporized body is heated by electric heater 2.
After raising the temperature to about 280°C, vaporized gas is generated and ignited near the small hole 4. Therefore, vaporized body 1
The heat receiving part 3, which is provided integrally with the housing, is also preheated to a high temperature of 280°C. Also, during preheating of the vaporized body 1, the small hole 1
2, 18 that the air sucked by the natural draft is sufficiently heated when it hits the heat receiving part 3;
This heated air rises between the inner flame tube 11 and the outer flame tube 17, raising the temperature of the inner flame tube 11, the outer flame tube 17, and the atmosphere between them. When vaporized gas is generated and ignited in such a state, the vaporized gas comes out from the small hole 4 of the heat receiving part 3, which has risen to the same temperature as the vaporized body 1, and the small holes 12, 18 facing the heat receiving part 3. It mixes with more air to form a pore combustion flame. At this time, the heat receiving part 3 is at a high temperature, and
Since the air from the small holes 12 and 18 is preheated, it is extremely easy to burn, and the condition is such that the flame is easily held in the heat receiving part 3, so that a stomatal combustion flame is stably formed in the small holes 12 and 18. This heat immediately starts to feed back the heat to the vaporized body 1, and further increases the temperature of the inner flame tube 11, the outer flame tube 17, and the temperature therebetween, which has already risen during preheating of the vaporized body 1. As a result, a stomatal combustion flame is formed in the small holes 12 and 18 from below in a stable manner, and the entire combustion is stabilized in a very short period of time.

In addition, by bringing the heat receiving part 3 close to the small holes 12 and 18 of the inner flame tube 11 and the outer flame tube, the small holes 12 and
The formation of the pore combustion flame at 18 can be stabilized in a short time, and sufficient heat feedback can be provided to the vaporized body 1.

Therefore, unlike conventional methods, it takes time from ignition to stable combustion, and during this time, incomplete combustion causes unburned gas,
Does not generate large amounts of CO or odor.

Effects of the Invention As described above, the combustor of the present invention provides the following effects.

(1) Since the heat of the pore combustion flame is directly fed back to the vaporizer, there is no variation in the amount of heat conduction, and the vaporizer can be sufficiently heated, resulting in a stable vaporization state and power savings.

(2) A stable pore combustion flame is formed immediately after ignition and heats the vaporized material, resulting in further power saving effects.

(3) At the initial stage of ignition, the conditions are such that a stomatal combustion flame is likely to form, and stable combustion occurs in a short period of time, resulting in unburned gas,
It is possible to significantly reduce CO and odor, and provide a comfortable combustor that is not harmful to the human body.

(4) By achieving stable vaporization and combustion during ignition and steady combustion, the range of combustion amount adjustment can be expanded.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing one embodiment of the present invention, and FIG. 2 is a side sectional view showing a conventional example. 1... Vaporized body, 2... Electric heater, 3... Heat receiving part, 4... Small hole, 11... Inner flame tube, 12... Small hole, 17... Outer flame tube, 18... Small hole.

Claims (1)

[Claims] 1. A vaporizer having an electric heater for preheating and forming a ring-shaped vaporization chamber, an inner flame tube and an outer flame tube connected to this vaporizer and having a large number of small holes, and an outer flame tube outside the outer flame tube. an oil supply pipe that opens into the vaporizer, and an oil supply pipe that is located between the inner and outer flame tubes and faces the small holes of the inner and outer flame tubes with a gap between them. a heat receiving part formed integrally with the
A pressure equalizing plate is located at the upper end opening of the heat receiving part and has a large number of small holes for sending vaporized gas between the inner flame tube and the outer flame tube. A liquid fuel combustion device consisting of a plurality of small holes that send vaporized gas into the gap between the small holes of the outer flame cylinder.