JP2002357305A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of choking due to production of tar of a vaporization accelerator and to perform excellent combustion by preventing the occurrence of poor vaporization. SOLUTION: A vaporization element 30 having the shape of a cylindrical brush formed by putting a number of flocked wires 29 between a plurality of core wires 28 and twisting the core wires 28 is disposed in a vaporization chamber 26 disposed in a vaporizer 21. A reticulate vaporization netting 32 the surface of which is formed in a bumpy state is disposed at the whole or a part of the inner wall of the vaporization chamber 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for vaporizing a liquid fuel and ejecting the vaporized gas from a nozzle for combustion.

[0002]

2. Description of the Related Art Various types of combustion devices of this type have been proposed in the past, some of which burn a vaporized gas obtained by vaporizing kerosene or the like. Hereinafter, a combustion device for burning the vaporized gas will be described as an example. Such a combustion device is configured as shown in FIG.

That is, first, fuel is supplied to the tank 1 from the cartridge tank 2, and the fuel in the tank 1 is supplied to the carburetor 4 maintained at a high temperature by the pump 3.
The supplied fuel is vaporized by a vaporization promoting material (not shown) such as a porous ceramic body or a wire mesh provided in the vaporizer 4 to become a vaporized gas, and has a high pressure in the vaporizer 4. Spouted horizontally. The fuel ejected from the nozzle 5 is ejected into a mixing pipe 6 provided at a position downstream of the vaporizer 5 while sucking primary air by an ejector effect. It is supplied to a burner 7 in shape and is burned there. The generated combustion gas is guided upward by a combustion tube 8 disposed so as to cover the periphery of the burner 7, mixed with a room air flow from a blower 10 by a duct 9 covering the combustion tube 8, and And is used for heating. When the fuel supply amount is adjusted by changing the driving frequency and applied voltage of the pump 3, the primary air amount increases and decreases accordingly, and the combustion amount is changed while the fuel-to-air ratio is kept constant. Is available.

[0004]

However, the combustion apparatus having such a configuration, when using defective kerosene such as deteriorated oil which has been stored and oxidized for a long period of time or a different kind of oil mixed with different components, as a fuel, causes a failure of the vaporizer 4. Tar is generated in the porous portion of the vaporization promoting material that vaporizes the fuel, causing clogging, causing poor combustion due to poor vaporization, and further clogging causes poor combustion due to clogging itself. there were.

[0005] For example, when clogging occurs and poor vaporization proceeds, the internal pressure of the vaporizer 4 does not increase so much that the vaporization of the vaporized gas from the nozzle 5 is weakened, and the fuel is discharged from the nozzle 5 as a liquid. And the ejector effect due to the ejection is weakened, and the suction amount of the primary air is reduced.
The burning state of the stomach has worsened, and pulse burning, odor, soot,
It produces carbon monoxide and eventually misfires.

When the clogging of the vaporization accelerating material progresses, the clogging of the vaporization accelerating material particularly near the fuel inlet of the carburetor 4 hinders the fuel from entering the carburetor 4. The amount of fuel entering the carburetor 4, that is, the amount of vaporization decreases with respect to the supply amount of carburetor 4, and the amount of combustion decreases even if the internal pressure of the carburetor 4 increases. May cause fire or misfire.

Here, whether the cause of the final defective state is due to poor vaporization or clogging depends on temperature conditions such as temperature distribution applied to the vaporization promoting material, and pore diameter of the vaporization promoting material. In general, the temperature of the vaporization accelerator is low and the former is poorly vaporized, and the temperature is high due to clogging of the latter, and the pore diameter of the vaporization accelerator is large and the porosity is large. If coarse, due to poor vaporization of the former, the pore diameter of the vaporization promoting material (the size of the space partitioned by the vaporization promoting material) is small, and if the porosity (space ratio of the vaporization promoting material) is small and dense, the latter is clogged. It is easy to cause poor combustion.

[0008] The combustion device stops the operation of the device by detecting an abnormality with a combustion sensor or the like before the odor or misfire occurs due to the above-mentioned poor vaporization or poor combustion due to clogging. However, there is a problem that clogging and poor vaporization due to tar generation of the vaporization promoting material affects the life of the device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to suppress clogging due to tar formation of a vaporization promoting material and prevent poor vaporization so that good combustion can be performed. .

[0010]

In order to achieve the above-mentioned object, a cylindrical brush-shaped vaporizing element formed by inserting a large number of flocking lines between a plurality of axes and twisting the axes in a vaporizing chamber provided in the vaporizer. Is disposed, and a net-like vaporization net having an uneven surface is disposed on the whole or a part of the inner wall of the vaporization chamber.

According to the above invention, in the case of normal kerosene, the fuel that has entered the vaporization chamber is vaporized by coming into contact with the vaporization chamber wall, the vaporization element and the vaporization net kept at a high temperature and is ejected from the nozzle. When defective fuel is mixed, the fuel entering the vaporization chamber gradually evaporates in the process of reaching the nozzle. At this time, the defective component of the fuel is not vaporized together with the vaporized gas of the normal fuel. As a sufficient fuel vaporized gas, it flows straight from the entrance of the vaporization chamber to the nozzle side, and on the way, contacts a large number of flocked lines of the vaporization element and is collected as a tar component. Therefore, the vaporized gas reaching the nozzle does not include insufficiently vaporized fuel vaporized gas, so that the vaporized gas ejected from the nozzle is ejected stably and combustion becomes stable.

Further, when the tar component accumulates in the flocking line and the straight flow of the fuel vaporized gas is hindered,
The flow of the vaporized gas passes through a spiral space portion without a flocking line formed by twisting the flocking line between the axes. The insufficiently vaporized fuel vaporized gas of the defective kerosene passes through a long spiral path formed by the wall of the flocked line to which the tar component is attached, and the tar component attached to the flocked line becomes a nucleus during the course of the evaporation. A sufficient amount of fuel vaporized gas will be collected. Therefore, the vaporized gas reaches the nozzle without including the insufficiently vaporized fuel vaporized gas until the spiral space formed by the wall of the flock line is closed with the tar component, so that the vaporized gas ejected from the nozzle is stable. The fuel is ejected and the combustion becomes stable.

[0013] The life of the vaporizing element is based on the fact that the former vaporized gas flows straight and the tar portion touches a large number of flocking lines of the vaporizing element and is collected, and the spiral space formed by the wall of the flocking line is formed. The period until the plug is covered with the tar component is reached, and the space for storing the tar component is wide in two stages, so that the life can be extended.

Further, when the inner wall of the vaporization chamber is at a high temperature in a surface state close to a mirror surface, or when the vaporization element is offset with respect to the vaporization chamber and the flocking line is not in contact with the wall of the vaporization chamber, or the flocking is caused by too much contact. If the fuel is difficult to vaporize, such as forming a wall with wires, and the temperature is high and it is easy to repel the fuel, the fuel that enters the vaporization chamber will cause film boiling, irregular vaporization and pressure fluctuations will occur. There was a concern that the vaporized gas spouted from the nozzle would fluctuate and generate pulse combustion. However, since the vaporization net was provided, the fuel that entered the vaporization chamber was diffused by the vaporization net and promoted vaporization. Therefore, film boiling can be prevented, stable vaporization can be obtained, and combustion becomes stable.

Further, the life of the vaporizing element is also promoted by the vaporization net, so that the defective kerosene is also vaporized, the vaporized gas which is insufficiently vaporized is reduced, the production of tar components is suppressed, and the life is further extended. Become like

In particular, since the vaporization net has fine irregularities on the surface, the fuel is easily adapted to the irregularities, and the fuel that touches the vaporization net is immediately absorbed by the vaporization net, and the vaporization chamber is further improved. It is easily diffused throughout, so that the above-mentioned vaporization can be stabilized and the life of the vaporization element can be extended.

[0017]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a vaporizer provided with a vaporization chamber for vaporizing supplied fuel, a heater for heating the vaporizer, and ejecting gas vaporized by the vaporizer. A nozzle and a burner for burning gas ejected from the nozzle are provided, and the vaporization chamber is provided with a cylindrical brush-shaped vaporization element formed by sandwiching a large number of flocked lines between a plurality of axes and twisting the axes. In addition, a net-like vaporization net having an uneven surface is provided on the whole or a part of the inner wall of the vaporization chamber.

In the vaporizing chamber, a cylindrical brush-shaped vaporizing element formed by interposing a large number of flocking lines between a plurality of axes and twisting the axes, and a net-shaped vaporizing net having an uneven surface are provided. The fuel that has entered the vaporization chamber is easily conformed to the unevenness of the vaporization net, can be diffused throughout the vaporization chamber, can be effectively vaporized by the cylindrical brush-shaped vaporization element, and is mixed with defective fuel. Can be contacted with a large number of flocking lines of the vaporizing element and collected as a tar component, so that a stable supply of vaporized gas and a long life of the vaporizing element can be achieved.

Further, according to a second aspect of the present invention, the vaporization net is 5
The structure is such that a baking treatment is performed while the temperature is kept at a temperature of 00 ° C. or more for a predetermined time.

Then, the surface state is oxidized and roughened to form fine irregularities, thereby improving the familiarity with the fuel that has entered the vaporization chamber, and immediately diffusing it throughout the vaporization chamber. The above-described vaporization is stabilized and the life of the vaporization element is extended.

Further, the change of the surface state due to the heat treatment is stable, and there is an advantage that the change in the surface state is small even if the temperature and the sintering time are slightly changed, and stable performance can be obtained.

Further, the invention according to claim 3 is configured such that the vaporized net is subjected to a treatment in which it is kept in an acid or alkali solution for a predetermined time.

The same effect can be obtained by means different from the second aspect, and the vaporized net is subjected to a chemical treatment in which the vaporized net is kept in an acid or alkali solution for a predetermined time. As it has fine irregularities, the fuel becomes more familiar with the irregularities, the fuel that touches the vaporization net is immediately absorbed by the vaporization net, and is more easily diffused throughout the vaporization chamber, and the above-mentioned stability of vaporization and The life of the vaporizing element can be extended.

Further, as compared with the baking treatment, there is an advantage that the change in the surface state changes greatly depending on the solution concentration and the processing time, and the surface state can be adjusted in a short time according to the setting of the condition of the vaporizer.

Further, in the invention according to claim 4, the vaporization net has a structure in which a coating treatment is applied to a part or the entire surface of the surface.

Then, by means different from Claims 2 and 3,
The same effect can be obtained by applying a coating treatment to a part or the entire surface of the vaporized net, for example, forming a coating film with good fuel wettability on the vaporized net surface in a porous state. Therefore, the fuel that has touched the vaporization net is immediately absorbed by the vaporization net, and is more easily diffused throughout the vaporization chamber, so that the above-mentioned vaporization can be stabilized and the life of the vaporization element can be extended.

Also, as compared with the calcination treatment or the chemical treatment, the type of fuel can be changed by changing its components, for example, by carrying a catalyst or the like which promotes the vaporization of the fuel, thereby enabling a treatment to further suppress tar. There is an advantage that the setting can be made according to.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a combustion device according to a first embodiment of the present invention, and FIG. 2 is a configuration diagram of a hot air heater using the combustion device.

First, the configuration of a hot-air heating device using the combustion apparatus of the present invention will be described with reference to FIG. Reference numeral 11 denotes a main body case, a tank 12 for holding liquid fuel on a lower side thereof, and a detachable cartridge tank 13 above the tank 12.
Is arranged. Reference numeral 14 denotes a pump mounted on the upper surface of the tank 12, and an oil feed pipe 15 is led out from an upper end thereof to supply fuel to a combustion device 16.

Numeral 17 denotes a combustion tube for guiding the combustion gas from the combustion device 16 upward, and a blower 18 for taking in and sending out the indoor air flow is disposed at the back of the combustion tube. Reference numeral 19 denotes a duct which mixes the combustion gas from the combustion tube 17 with the indoor air flow to generate hot air. A control unit 20 controls the combustion of the combustion device 16 and the blower 18, and controls the pump 14 and the blower 18 in a predetermined sequence based on an operation condition signal input from the operation unit. .

Next, the structure of the combustion device 16 will be described with reference to FIG. 1. Reference numeral 21 denotes a carburetor, which is provided with a circular burner receiving seat 22 on its upper part, and is located substantially at the center of the burner receiving seat 22. The nozzle 23 is arranged as described above, an opening 24 for primary air intake for supplying combustion air is provided between the burner receiving seat 22 and the nozzle 23, and a cylinder is formed through a communication port 25 communicating with the nozzle 23. Vaporization chamber 26
Are formed integrally by extending in the outer circumferential direction, and supply fuel to the end of the vaporization chamber 26 on the opposite side of the nozzle 23.
Is provided as a separate cap 27.

The vaporizing chamber 16 has a cylindrical brush-shaped vaporizing element 30 formed by interposing a number of flocked lines 29 between a plurality of axes 28 and twisting the axes, and refueling for supplying fuel on the opposite side of the nozzle 23. On the side of the port 31, a vaporization net 32 obtained by rounding a biased net into a cylindrical shape is disposed between the vaporization chamber 26 and the vaporization element 30.
No. 2 has been subjected to a baking treatment while being kept at a temperature of 500 ° C. or higher for a predetermined time. Further, a heater 33 is arranged along the lower surface side of the burner receiving seat 22 on the opposite side of the vaporization chamber 16 of the vaporizer 21.

Numeral 34 denotes a bottomless cylindrical mixing tube mounted on the burner receiving seat 22 so as to be located above the nozzle 23. The mixing tube 34 is opposed to the nozzle 23. The primary air sucked by the ejector effect by the ejection of the fuel gas is mixed with the primary air.

Numeral 35 denotes a cantilevered burner which is overlapped and covered on the burner receiving seat 22 from the upper opening side so as to cover the mixing tube 34, and has a large number of flame holes 35A formed in the lower peripheral wall.

Reference numeral 36 denotes an upwardly tapered burner ring attached to the burner receiving seat 22 so as to surround the outer peripheral portion of the flame hole 35A. Reference numeral 37 denotes a heat receiving portion formed in the burner receiving seat 22.

In the above configuration, the cartridge tank 1
The liquid fuel supplied to the tank 12 so as to maintain a constant oil level from 3 is sucked up from the tank 12 by the pump 14 and sent to the vaporization chamber 26 of the combustion device 16 via the oil supply pipe 15 and the oil supply port 30. . The sent fuel is vaporized in the vaporization chamber 26 maintained at a predetermined temperature or higher by the heater 33 and becomes a high-pressure fuel gas and is ejected from the nozzle 23. At this time, the primary air is sucked by the ejector effect and the vaporization chamber 2 is sucked.
6 are mixed in a mixing pipe 34 provided downstream of the burner 3.
5 and is discharged from the flame hole 35A and burned.
The generated combustion gas flows above the combustion cylinder 17 and is mixed with the indoor air flow from the blower 18 in the duct 19, discharged as warm air, and used for heating. And the control part 20 is based on the conditions set by the operation part,
The heater 33, the pump 14, the blower 18 and the like are controlled in a predetermined sequence to control the operation such as starting and stopping the operation and changing the combustion amount.

The combustion in the burner 35 will be described. The fuel gas ejected from the nozzle 23 flows into a mixing pipe 34 provided downstream of the vaporization chamber 26 while sucking primary air by an ejector effect. Mixed with
The gas is discharged into the burner 35 from the upper opening of the mixing tube 34, flows back around the outer periphery of the mixing tube 34, and is ejected from a large number of flame holes 35 </ b> A provided in a peripheral wall below the burner 35, and burns.

At this time, the mixed gas returns to the burner 35 and flows around the mixing pipe 34, where diffusion mixing and uniform pressure are promoted, and the mixed gas is uniformly jetted from the flame hole 35A.
Form a uniform flame. The flame formation direction is controlled to be upward by a burner ring 36 provided on the outer periphery of the flame, and stable combustion without lift is performed. Heat receiving flange 3
Numeral 7 is heated by the flame formed in the flame hole 35A of the burner 35, and the temperature of the vaporization chamber 26 is maintained at a certain temperature or higher by the heat recovery action from the flame, and a part of the power supply to the heater 33 or All can be reduced.

Next, the vaporization of the fuel supplied to the burner 35 will be described. The vaporizing chamber 26 includes a cylindrical brush-shaped vaporizing element 30, the vaporizing chamber 26, and the vaporizing element 30.
A vaporization net 32 rounded into a cylindrical shape is disposed between
The fuel that has entered the vaporization chamber 26 is vaporized by contacting the vaporization chamber 26 inner wall, the vaporization net 32, and the vaporization element 30 that are kept at a high temperature, and is ejected from the nozzle 23. If defective fuel is mixed in at that time, first, the fuel that has entered through the fuel supply port 31 gradually evaporates in the process of reaching the nozzle 23, and at that time, the fuel together with the vaporized gas of the normal fuel The poor component flows straight from the fuel supply port 31 of the cap 27 of the vaporization chamber 26 to the nozzle 23 side as insufficiently vaporized fuel vaporized gas, and on the way, contacts a large number of flocking lines 29 of the vaporization element 30 and is captured as a tar component. Gathered. Therefore, the vaporized gas reaching the nozzle 23 does not include a fuel vaporized gas that is insufficiently vaporized, so that the vaporized gas ejected from the nozzle 23 is ejected stably and the combustion becomes stable.

When the tar component accumulates on the flocked line 29 and the flow of the fuel vaporized gas goes straight, the flow of the vaporized gas is changed along the axis 28 and the flocked line 2 along the axis 28.
It passes through a spiral space portion without the flocking line 29 formed by twisting the pin 9 in between. The insufficiently vaporized fuel vaporized gas of the defective kerosene passes through the long spiral path formed by the wall of the flocked line 29 to which the tar component is attached, and the tar component attached to the flocked line 29 becomes a nucleus, Insufficient vaporization of fuel vaporized gas is collected. Therefore,
Until the spiral space formed by the wall of the flocking line 29 is closed with the tar component, the vaporized gas reaches the nozzle 23 without including the insufficiently vaporized fuel vaporized gas, so that the vaporized gas ejected from the nozzle 23 is stable. The fuel is ejected and the combustion becomes stable.

The life of the vaporizing element 30 is determined by the time during which the vaporized gas flows straight and the tar component touches a large number of the flocking lines 29 of the vaporizing element 30 and is collected.
Since the spiral space formed by the wall of the flocking line 29 is closed until the tar component is closed, the space in which the tar component is accumulated in two stages and the space is large, so that the life can be extended.

Further, when the inner wall of the vaporizing chamber 26 is close to a mirror surface and is at a high temperature, or when the vaporizing element 30 is
6, the flocked line 29 is not in contact with the inner wall of the vaporization chamber 26, or the flocked line 29 is too in contact with the inner wall of the vaporization chamber 26 to form a wall or an oil pool. When this happens, the fuel that has entered the vaporization chamber 26 may cause film boiling and pulse combustion, but since the vaporization net 32 is provided, the fuel that has entered the vaporization chamber 26 is vaporized. Diffusion in the net 32 promotes vaporization, film boiling can be prevented, stable vaporization is obtained, and combustion becomes stable.

In other words, the incoming fuel is accumulated as a liquid at the bottom of the vaporizing chamber 26 until it is vaporized, and when the temperature becomes high during the vaporization and the film boils, the oil droplets of the fuel fly off to the surroundings. High temperature vaporization chamber 26 inner wall and vaporization element 3
When it comes into contact with zero, it evaporates, the evaporation becomes irregular, pressure fluctuations occur, and pulse combustion occurs. Here, when the vaporizing net 32 is present, the liquid fuel that has entered does not accumulate on the bottom surface of the vaporizing chamber 26 due to the capillary action between the vaporizing net 32 and the inner wall of the vaporizing chamber 26, and is diffused throughout the part of the vaporizing net 32. The vaporization area spreads to the peripheral wall of the inner wall of the vaporization chamber 26, and the vaporization area is widened. Further, the vaporization net 32 forms a nucleus of boiling, so that vaporization is promoted and film boiling can be prevented.

In particular, since the vaporization net 32 has been subjected to a baking treatment while being kept at a temperature of 500 ° C. or higher for a predetermined time, the surface state thereof is oxidized to be rough and has fine irregularities, and the fuel is The fuel is easily absorbed by the irregularities, and the fuel that has touched the vaporization net 32 is immediately absorbed by the vaporization net 32, and is more easily diffused throughout the vaporization chamber 26, so that the above-mentioned vaporization can be stabilized and the life of the vaporization element 30 can be extended. Become like

Further, the change of the surface state due to the heat treatment is stable, and the change in the surface state is small even if the temperature and the calcination time are slightly changed, and there is an advantage that stable performance can be obtained.

(Embodiment 2) FIG. 3 shows a process chart of a vaporized net according to Embodiment 2. The same portions as those described in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Only the different portions will be described. The vaporization net 41 has a configuration in which an acid solution is treated for a predetermined time.

In the above configuration, the same effect is obtained by means different from that of the first embodiment.
The acid solution has been subjected to a chemical treatment for a predetermined period of time. Similarly, the surface condition is oxidized and roughened to have fine irregularities, and the fuel is easily adapted to the irregularities and enters the vaporization chamber 26. The fuel that has come into contact with the vaporization net 41 is immediately absorbed by the vaporization net 41, and is more easily diffused throughout the vaporization chamber 26, so that the vaporization stability and the life of the vaporization element of the first embodiment can be extended.

Further, as compared with the baking treatment, there is an advantage that the change of the surface state changes greatly depending on the solution concentration and the processing time, and the surface state can be adjusted in a short time according to the setting of the condition of the vaporizer.

(Embodiment 3) FIG. 4 shows a process chart of a vaporized net of Embodiment 2. The same portions as those described in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Only the different portions will be described. The vaporization net 42 has a configuration in which the entire surface is subjected to a coating process.

In the above-described configuration, the same effect is obtained by means different from the first and second embodiments.
Has been subjected to a coating process on the entire surface thereof. For example, by forming a coating film having good wettability of fuel on the surface of the vaporization net 42 in a porous state, the film enters the vaporization chamber 26 and is formed on the vaporization net 42. The fuel touched is immediately vaporized net 42
And the gas is more easily diffused throughout the vaporization chamber, so that the above-mentioned vaporization can be stabilized and the life of the vaporization element 30 can be extended.

Further, as compared with the calcination treatment or the chemical treatment, the type of the fuel can be improved by changing its components, for example, by carrying a catalyst or the like which promotes the vaporization of the fuel, thereby performing a treatment for further suppressing tar. There is an advantage that the setting can be made according to.

In the present invention, the vaporization net 32 has been described as being disposed on the side of the fuel supply port 31 and a biased net is rounded into a cylindrical shape between the vaporization chamber 26 and the vaporization element. 16 may be disposed on the whole, and the vaporization net 3
Although 2 was formed by a biased net, it may be formed by a mesh net, and any other configuration may be used as long as the configuration of each part is within a range that achieves the object of the present invention. It may be.

[0054]

As described above, according to the present invention, a cylinder formed by interposing a large number of flocked lines between a plurality of axes and twisting the axes is provided in the vaporization chamber arranged in the vaporization cylinder to evaporate the fuel. The brush-type vaporization element and the net-like vaporization net with uneven surface make it easy for fuel entering the vaporization chamber to fit into the irregularity of the vaporization net and immediately diffuse to the entire vaporization chamber. Can be effectively vaporized by the cylindrical brush-shaped vaporizing element,
The mixed defective fuel can be contacted with a large number of flocked lines of the vaporizing element and collected as a tar component, so that a stable supply of vaporized gas and a long life of the vaporizing element can be achieved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a combustion device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a warm air heater using the combustion device.

FIG. 3 is a processing step diagram in Embodiment 2 of the present invention.

FIG. 4 is a processing step diagram in Embodiment 3 of the present invention.

FIG. 5 is a configuration diagram of a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Vaporizer 23 Nozzle 26 Vaporization chamber 28 Axis 29 Flocking line 30 Vaporization element 32 Vaporization net 33 Heater 36 Burner

Claims (4)

[Claims] 1. A vaporizer provided with a vaporization chamber for vaporizing supplied fuel, a heater for heating the vaporizer, a nozzle for ejecting gas vaporized by the vaporizer, and a gas ejected from the nozzle. And a burner that burns, and the vaporization chamber is provided with a cylindrical brush-shaped vaporization element formed by sandwiching a number of flocked lines between a plurality of axes and twisting the axis, and the surface is made uneven. A combustion device in which a mesh-like vaporization net is disposed on the whole or a part of the inner wall of the vaporization chamber. 2. The combustion apparatus according to claim 1, wherein the vaporization net is subjected to a baking treatment while maintaining the temperature at a temperature of 500 ° C. or higher for a predetermined time. 3. The combustion apparatus according to claim 1, wherein the vaporization net is subjected to a treatment in which the vaporization net is kept in an acid or alkali solution for a predetermined time. 4. The combustion device according to claim 1, wherein the vaporizing net is subjected to a coating treatment on a part or the entire surface of the surface.