JPH1172207A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize combustion by arranging a vaporizing net in the form of a net in the whole or part of the inner wall of a vaporizing chamber in such a manner that the vaporizing net adheres to the inner wall of the vaporizing chamber. SOLUTION: The fuel which has come in is liquid until it is vaporized, and stays at the lower part of a vaporizing chamber 16. If film boiling occurs in the process of vaporization, the oil droplets of the fuel splashes around, and then it contacts with the inner wall of the high temperature vaporizing chamber 16 and a vaporizing element 19 to be vaporized. However, the vaporization becomes irregular, and then pressure fluctuation is caused, so that pulsating combustion gets to be caused. Since there is a vaporizing net 21, the liquid fuel which has come in does not stay in the lower part of the vaporizing chamber due to the capillarity of the vaporizing net 21 and the inner wall of the vaporizing chamber 16. The liquid fuel is diffused to the whole part with the vaporizing net 21, and then it spreads to the peripheral wall of the inner wall of the vaporizing chamber 16 to spread the vaporization area. Moreover, the vaporizing net 21 makes the nucleus of boiling, so as to promote vaporization, and to be able to prevent film boiling.

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 apparatuses of this type have been proposed in the past, some of which burn liquid fuel gas obtained by vaporizing kerosene or the like. Hereinafter, a combustion device for burning this liquid fuel gas will be described as an example. Such a combustion device is configured as shown in FIG.

That is, first, fuel is supplied from the cartridge tank 28 to the tank 27, and the fuel in the tank 27 is supplied into the vaporizing section 30 maintained at a high temperature by the pump 29. The supplied fuel is vaporized by a vaporization promoting material (not shown) such as a ceramic porous body or a wire mesh provided in the vaporization unit 30 to become a vaporized gas, and has a high pressure in the vaporization unit 30. Spouted horizontally. The fuel ejected from the nozzle 31 is ejected into a mixing pipe 32 provided at a position downstream of the vaporizing section 31 while sucking primary air by an ejector effect, and is mixed there. It is supplied to the burner part 33 of the shape,
It is burned there. The generated combustion gas is guided upward by a combustion tube 34 disposed so as to cover the periphery of the burner portion 33, mixed with a room air flow from a blower 36 by a duct 35 covering the combustion tube 34, and heated. It is discharged as wind and used for heating. When the fuel supply is adjusted by changing the drive frequency or applied voltage of the pump 29,
The amount of primary air also increases and decreases accordingly, and the amount of combustion can be changed while the fuel-to-air ratio is kept constant.

[0004]

However, in the combustion apparatus having such a configuration, when a defective kerosene such as a deteriorated oil which has been stored and oxidized for a long period of time or a different kind of oil mixed with a different kind of component is used as a fuel, the combustion unit 30 has a disadvantage. There is a problem in that tar is generated in the porous portion of the vaporization promoting material that vaporizes the fuel, causing clogging, and poor combustion due to poor vaporization.

For example, when clogging occurs and poor vaporization proceeds, the internal pressure of the vaporizing section 30 does not increase so much and the nozzle 31
And the fuel is ejected from the nozzle 31 as a liquid, the ejector effect by the ejection is weakened, the primary air suction amount is reduced, and the combustion state of the burner 33 is deteriorated. The result is pulsating combustion, odor, soot, carbon monoxide, or even a misfire.

Further, when the clogging of the vaporization accelerating material further proceeds, the clogging of the vaporization accelerating material in the vicinity of the fuel inlet of the vaporization section 30 hinders the fuel from entering the vaporization section 30 and the pump 29 The fuel that enters the vaporizing section 30, that is, the amount of vaporization decreases with respect to the supply power of the fuel, and the amount of combustion decreases even if the internal pressure of the vaporizing section 30 increases. May cause fire or misfire.

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

[0008] The combustion apparatus detects an abnormality with a combustion sensor or the like and stops the operation of the apparatus before a odor or a misfire phenomenon that occurs due to poor vaporization or poor combustion due to clogging as described above. Thus, there is a problem that clogging failure of the vaporization promoting material due to tar generation of the vaporization promoting material affects the life of the device.

[0009]

In order to achieve the above object, the present invention provides a fuel supply means for supplying fuel, a vaporizing section provided with a vaporizing chamber for vaporizing the supplied fuel, A heater for heating, a nozzle for ejecting gas vaporized by the vaporizing unit, and a burner unit for burning gas ejected from the nozzle are provided, and the vaporizing chamber has a plurality of flocked lines interposed between a plurality of axes, and the axis is inserted. A cylindrical brush-shaped vaporizing element formed by twisting is provided, and a net-like vaporizing net is disposed on the whole or a part of the inner wall of the vaporizing chamber so as to be in close contact with the inner wall of the vaporizing chamber.

According to the above invention, the fuel that has entered the vaporization chamber is kept at a high temperature by the inner wall of the vaporization chamber, the vaporization element,
It touches the vaporization net and vaporizes and is ejected from the nozzle. If defective fuel is mixed in at that time, the fuel that has entered from the inlet side will gradually evaporate as it reaches the nozzle, and at this time, the fuel will be defective together with the vaporized gas of the normal fuel. The components flow straight from the inlet of the vaporization chamber to the nozzle side as insufficiently vaporized fuel vaporized gas. On the way, the components touch a large number of flocked lines of the vaporization element and are collected as tar components. 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, until the spiral space formed by the wall of the flock line is closed with the tar component, the vaporized gas reaches the nozzle without containing the insufficiently vaporized fuel vaporized gas, so that the vaporized gas ejected from the nozzle is stable. And the combustion becomes stable.

[0012] The life of the vaporizing element depends on whether the former vaporized gas flows straight and the tar component touches and collects on a number of flocking lines of the vaporizing element, and a spiral space formed by the wall of the flocking line. This is a period of time until the tar component is blocked by the tar component, 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 vaporizing chamber is at a high temperature in a surface state close to a mirror surface, or when the vaporizing element is offset with respect to the vaporizing chamber and the flocked line is not in contact with the inner wall of the vaporizing chamber or is too in contact with the inner wall. If the vaporization chamber becomes hot in a state where it is difficult to vaporize the fuel, such as when the flocking line becomes a wall, the fuel that enters the vaporization chamber will undergo film boiling, irregular vaporization, causing pressure fluctuations, and pulsating combustion. However, since the present invention has a vaporization net, the fuel that has entered the vaporization chamber diffuses in the vaporization net and is promoted to vaporize, so film boiling can be prevented and stable vaporization can be achieved. The resulting 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, and the generation of the tar component is suppressed, so that the life can be further extended. Become like

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a fuel supply means for supplying fuel, a vaporization section provided with a vaporization chamber for vaporizing the supplied fuel, a heater for heating the vaporization section,
A cylinder formed by a nozzle for ejecting gas vaporized in the vaporizing section, and a burner section for burning the gas ejected from the nozzle, and a vaporizing chamber formed by twisting a plurality of flocked lines between a plurality of axes and twisting the axes. A brush-shaped vaporizing element is provided, and a net-like vaporizing net is disposed on the whole or a part of the inner wall of the vaporizing chamber so as to be in close contact with the inner wall of the vaporizing chamber.

Then, the fuel that has entered the vaporization chamber is vaporized by contacting the inner wall, the vaporization element, and the vaporization net of the vaporization chamber maintained at a high temperature, and is ejected from the nozzle. If defective fuel is mixed in at that time, the fuel that has entered from the inlet side will gradually evaporate as it reaches the nozzle, and at this time, the fuel will be defective together with the vaporized gas of the normal fuel. The components flow straight from the inlet of the vaporization chamber to the nozzle side as insufficiently vaporized fuel vaporized gas. On the way, the components touch a large number of flocked lines of the vaporization element and are collected as tar components. Therefore, the vaporized gas reaching the nozzle is
Since it does not contain insufficiently vaporized fuel vaporized gas, the vaporized gas ejected from the nozzle is ejected stably, and the combustion becomes stable.

Further, when the tar component accumulates on 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, until the spiral space formed by the wall of the flock line is closed with the tar component, the vaporized gas reaches the nozzle without containing the insufficiently vaporized fuel vaporized gas, so that the vaporized gas ejected from the nozzle is stable. And the combustion becomes stable.

[0018] The life of the vaporizing element depends on whether the vaporized gas of the former flows straight and the tar component 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. This is a period of time until the tar component is blocked by the tar component, 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 flocked line is not in contact with the inner wall of the vaporization chamber, or is too contacted. If the vaporization chamber becomes hot in a state in which fuel vaporization is difficult, such as when the flocking line also forms a wall and oil pools are formed, the fuel that enters the vaporization chamber will cause film boiling and cause pulsating combustion. However, since the vaporization net is provided, the fuel that has entered the vaporization chamber diffuses in the vaporization net, is promoted to vaporize, prevents film boiling, provides stable vaporization, and stabilizes combustion.

Further, the life of the vaporizing element is also promoted by the vaporizing net, so that the defective kerosene is also vaporized, the vaporized gas which is insufficiently vaporized is reduced, the generation of the tar component is suppressed, and the life is further extended. I can plan.

The invention according to claim 2 has a structure in which the vaporization net is formed by rolling a bias net into a cylindrical shape.

Since the fuel that has entered the vaporization chamber flows in a biased manner along the line of the vaporization net, the fuel is about 1.4 times as long as the mesh that flows straight toward the outlet. As the distance increases, vaporization is promoted during that time, vaporization gas that is insufficiently vaporized is reduced, generation of tar components is suppressed, and the life can be further extended.

Further, since the cylindrical vaporization net is a biased net, it has elasticity in the longitudinal direction and the radial direction of the cylinder and easily adheres to the inner wall of the vaporization chamber, so that the vaporization performance is improved. Will be stabilized.

The invention according to claim 3 is configured such that the vaporization net is fixed to the inner wall forming the vaporization chamber by spot welding.

Since the vaporization net is fixed to the inner wall of the vaporization chamber by spot welding so as to be in close contact with the inner wall of the vaporization chamber, the temperature of the vaporization net can be kept high and the vaporization net and the inner wall of the vaporization chamber can be connected. The gap becomes narrower, and the fuel that has entered the vaporization chamber is easily diffused by capillary action, and the gap between the vaporization chamber and the vaporization net becomes narrower, the fuel film between them becomes thinner, which makes it easier to vaporize, and further promotes vaporization. Film boiling can be prevented, stable vaporization can be obtained, and combustion becomes stable.

Further, according to the invention of claim 4, the vaporization net is
The configuration is made of stainless steel net.

The fuel that has entered the vaporization chamber touches the vaporization net. Since the vaporization net is formed of a stainless steel net having a large heat capacity and poor heat conductivity, it is compared with other materials such as brass. Even if the fuel changes temporarily, the change in the temperature of the vaporization net gradually changes, and during that time, the temperature of the vaporization chamber is corrected by the feedback of the heat received by the combustion heat, so that the vaporization performance is stabilized.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

First, the configuration of a hot-air heater using the combustion apparatus of the present invention will be described with reference to FIG. Reference numeral 1 denotes a main body case, on which a tank 2 for holding liquid fuel is provided at a lower portion thereof, and a detachable cartridge tank 3 is provided above the tank 2. Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2, which is adapted to lead an oil feed pipe 5 from its upper end to supply fuel to a combustion device 6.

Reference numeral 7 denotes a combustion tube for guiding the combustion gas from the combustion device 6 upward, and a blower 8 for taking in and sending out the indoor air flow is disposed at the back of the combustion tube. Reference numeral 9 denotes a duct which mixes the combustion gas from the combustion tube 7 with the indoor air flow to generate hot air. 1
A control unit 0 controls the combustion of the combustion device 6 and the blower 8, and controls the pump 4 and the blower 8 in a predetermined sequence based on an operation condition signal input from the operation unit. .

Next, the structure of the combustion device 6 will be described with reference to FIG. 1. Reference numeral 11 denotes a vaporizer, which is provided with a circular burner receiving seat 12 at the upper part thereof, and is located substantially at the center of the burner receiving seat 12. A nozzle 13 is disposed in the nozzle, an opening 14 for primary air intake for supplying combustion air is provided between the burner receiving seat 12 and the nozzle 13, and a cylindrical vaporization chamber is provided through a communication port 15 communicating with the nozzle. 16 is formed integrally by extending in the outer peripheral direction. This vaporization chamber 16 is provided with
Is fixed to the vaporizing section 11 by brazing or the like.

The vaporizing chamber 16 has a cylindrical brush-shaped vaporizing element 19 formed by interposing a number of flocking lines 18 between a plurality of axes 17 and twisting the axes, and a nozzle 13.
A stainless steel vaporizer in which a biased net is cylindrically rounded between an inner wall of a vaporizer chamber 16 formed in a vaporizer cap 20 connected to an oil feed pipe 5 for supplying fuel on the opposite side and a vaporizer element 19. A net 21 is provided, and the lower portion of the vaporizing net 21 is fixed to the inner wall of the vaporizing chamber 16 by a spot weld 21A. In addition, vaporization section 1
A heater 22 is disposed along the lower surface of the burner receiving seat 12 on the opposite side of the first vaporization chamber 16.

Reference numeral 23 denotes a bottomless cylindrical mixing tube mounted on the burner receiving seat 12 so as to be located above the nozzle 13, facing the nozzle 13, and the fuel gas ejected from the nozzle 13 and its fuel gas. The primary air sucked by the ejector effect by the ejection of the fuel gas is mixed with the primary air.

Numeral 24 is a burner portion having a cylindrical shape covered with the burner receiving seat 12 so as to cover the mixing tube 23, and has a large number of flame holes 24A formed in the lower peripheral wall.

Reference numeral 25 denotes an upwardly tapered burner ring attached to the burner receiving seat 12 so as to surround the outer peripheral portion of the flame hole 24A. Reference numeral 26 denotes a heat receiving portion formed on the burner receiving seat 12.

In the above configuration, the cartridge tank 3
The liquid fuel supplied to the tank 2 so as to keep a constant oil level from the tank 2 is sucked up from the tank 2 by the pump 4 and sent to the vaporization chamber 16 via the oil supply pipe 5. The sent fuel is vaporized in the vaporization chamber 16 maintained at a predetermined temperature or higher by the heater 22 and becomes a high-pressure fuel gas, and is ejected from the nozzle 13. At this time, the primary air is sucked by the ejector effect and the vaporization of the vaporization chamber 16 is stopped. The mixture is mixed in the mixing pipe 23 provided on the downstream side, supplied to the burner section 24, ejected from the flame hole 24A and burned. Then, the generated combustion gas flows above the combustion cylinder 7, is mixed with the indoor air flow from the blower 8 in the duct 9, is discharged as warm air, and is used for heating. Then, the control unit 10 controls the heater 22, the pump 4, the blower 8 and the like in a predetermined sequence based on the conditions set by the operation unit to start and stop the operation, and to change the combustion amount. Perform operation control.

Explaining the combustion in the burner section 24, the fuel gas ejected from the nozzle 13 flows into the mixing pipe 23 provided on the downstream side of the vaporization chamber 16 while sucking the primary air by the ejector effect. Here, the mixture is discharged from the upper opening of the mixing tube 23 into the burner portion 24, flows back around the outer periphery of the mixing tube 23, and is ejected from a large number of flame holes 24A provided on the peripheral wall below the burner portion 24 to burn. I do.

At this time, the mixed gas returns to the burner section 24 and flows around the mixing pipe 23, where diffusion mixing and uniform pressure are promoted, and the mixed gas is jetted out uniformly from the flame hole 24A to form a uniform flame. I do. The flame formation direction is controlled to be upward by a burner ring 25 provided on the outer periphery of the flame, and stable combustion without lift is performed. Further, the heat receiving flange 26 is heated by the flame formed in the flame hole 24A of the burner portion 24, and the temperature of the vaporizing chamber 16 is maintained at a certain temperature or higher by the heat recovery action from the flame, so that the heater 2
It is possible to reduce a part or all of the current supply to 2.

The vaporization of fuel supplied to the burner section 24 will be described. The vaporization chamber 16 has a cylindrical brush-shaped vaporization element 19 and a biased net between the inner wall of the vaporization chamber 16 and the vaporization element 19. A stainless steel vaporizing net 21 formed in a shape is provided, and the vaporizing chamber 1
The fuel that has entered 6 comes into contact with the inner wall of the vaporization chamber 16 maintained at a high temperature, the vaporization net 21, and the vaporization element 19, is vaporized, and is ejected from the nozzle 13. Also, if defective fuel is mixed in at that time, first, the fuel that has entered from the oil supply pipe 5 is gradually vaporized in the process of reaching the nozzle 13, and at this time, along with the vaporized gas of the normal fuel. Defective components of the fuel are converted into insufficiently vaporized fuel vaporized gas in the vaporization chamber 16.
Flows straight to the nozzle 13 side from the entrance, and on the way, it touches a large number of flocking lines 18 of the vaporizing element 19 and is collected as a tar component. Therefore, the vaporized gas that reaches the nozzle 13 does not include insufficiently vaporized fuel vaporized gas, so that the vaporized gas ejected from the nozzle 13 is ejected stably, and the combustion becomes stable.

When the tar component accumulates on the flocking line 18 and the straight flow of the fuel vaporized gas is hindered, the flow of the vaporized gas is twisted across the axis 17 and the flocking line 18 with the axis 17. It passes through a helical space portion without a flock line 18 that can be formed. The insufficiently vaporized fuel vaporized gas of the bad kerosene passes through a long spiral path formed by the wall of the flocking line 18 to which the tar component has adhered.
The tar component attached to the flocking line 18 serves as a nucleus to collect insufficiently vaporized fuel vaporized gas. Therefore, until the spiral space formed by the wall of the flocking line 18 is closed with the tar component, the vaporized gas reaches the nozzle 13 without containing the insufficiently vaporized fuel vaporized gas. Is injected stably, and the combustion becomes stable.

The life of the vaporizing element 19 is determined by the time during which the vaporized gas flows straight and the tar component touches a large number of the flocking lines 18 of the vaporizing element 19 and is collected.
Since the spiral space formed by the wall of the flocking line 18 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 service life can be extended.

Further, when the inner wall of the vaporizing chamber 16 is close to a mirror surface and is at a high temperature, or when the vaporizing element 19 is
The state in which the fuel implantation line 18 is not in contact with the inner wall of the vaporization chamber 16 due to the offset with respect to 6, or the fuel implantation line 18 forms a wall due to the excessive contact and the oil accumulation is caused. When the vaporization chamber becomes hot, the vaporization chamber 1
There is a concern that the fuel that has entered the inside 6 may cause film boiling and pulsating combustion. However, in the present invention, since the vaporization net 21 is provided, the fuel that has entered the vaporization chamber 16 uses the vaporization net 16.
To promote vaporization, prevent film boiling, and obtain a stable vaporized state and stable combustion without pulsation.

That is, the incoming fuel is accumulated in the lower portion of the vaporization chamber 16 as a liquid until it vaporizes, and when the film boils during the vaporization process, oil droplets of the fuel fly off to the surroundings, and the high-temperature vaporization chamber 1
6 comes into contact with the inner wall and the vaporizing element 19 and vaporizes. However, the vaporization becomes irregular, causing pressure fluctuations and pulsating combustion. Here, when the vaporization net 21 is present, the liquid fuel that has entered does not accumulate in the lower portion of the vaporization chamber due to the capillary action between the vaporization net 21 and the inner wall of the vaporization chamber 16, but is diffused throughout the portion where the vaporization net 21 exists. Thus, the gas spreads over the peripheral wall of the inner wall of the vaporization chamber 16 and the vaporization area expands. Further, since the vaporization net 21 forms a nucleus of boiling, vaporization is promoted and film boiling can be prevented.

Further, the life of the vaporizing element 19 is also promoted by the vaporizing net 21, so that the defective kerosene is also vaporized, the vaporized gas which is insufficiently vaporized is reduced, and the generation of the tar component is suppressed, and the life is further extended. Can be achieved.

Since the vaporizing net 21 is fixed to the inner wall of the vaporizing chamber 16 by spot welding 21A, the vaporizing net 21 is fixed in close contact with the inner wall of the vaporizing chamber 16 so that the temperature of the vaporizing net 21 can be kept high. In addition, the gap between the vaporization net 21 and the inner wall of the vaporization chamber 16 becomes narrow, and the vaporization chamber 16 is formed by capillary action.
The fuel that has entered inside is easily diffused, and the gap between the vaporization chamber 16 and the vaporization net 21 is narrowed, and the fuel film therebetween is thinned and easily vaporized. Further, vaporization is promoted, so that film boiling can be prevented and stable. Vaporization and combustion are obtained.

Further, the vaporizing net 21 is connected to the vaporizing chamber 16.
However, when the vaporizing element 19 is inserted into the vaporizing chamber 16 at the time of assembling, there is a risk that the vaporizing element 19 will be displaced and the performance will not be satisfactorily obtained. , The vaporization net 21 can be fixed at a predetermined position, and its performance can be stabilized.

Further, since the biased net is formed in the cylindrical shape in the vaporizing net 21, the fuel entering the vaporizing chamber 16 flows obliquely in a biased manner along the line of the vaporizing net 21, so that the outlet is formed. It flows about 1.4 times the length of the mesh net flowing linearly toward the, and the longer the distance, the more the vaporization is promoted and the amount of insufficiently vaporized gas is reduced, and the generation of tar components is suppressed. As a result, the service life can be further extended.

Further, the cylindrical vaporization net 21 is
Since it is a biased net, it has elasticity in the longitudinal direction and the radial direction of the cylinder, and easily fits and adheres to the inner wall of the vaporization chamber 16, so that the vaporization performance is stabilized.

Further, since the vaporization net 21 is formed of a stainless steel net, the fuel entering the vaporization chamber 16 touches the vaporization net 21, but the vaporization net 21 has a large heat capacity and poor heat conductivity. Because it is formed of a conductive net, even if the fuel changes temporarily, the temperature change of the vaporization net 21 gradually changes compared to other materials such as brass, and during that time, the vaporization is performed by the feedback of the heat received by the combustion heat. Since the temperature of the chamber 16 is corrected, the vaporization performance is stabilized.

In the embodiment of the present invention, the vaporizing net 21 is provided in a part of the vaporizing chamber 16.
And the vaporization net 21 is formed by a biased net, but this may be formed by a mesh net, and the vaporization net 21 is spotted on the inner wall of the vaporization chamber 16. Although it was fixed by welding 21A, this may be another fixing method, and the vaporization net 21 was made of stainless steel, but this may be another metal, and the configuration of each part is within a range that achieves the object of the present invention. The configuration may be any.

[0051]

As described above, according to the first aspect of the present invention, there is provided a combustion apparatus according to the present invention, wherein a plurality of flocked lines are sandwiched between a plurality of axes in a vaporization chamber, and the cylinders are formed by twisting the axes. Since a brush-shaped vaporizing element is arranged,
Initially, the vaporized gas flows straight through the tar component, and the vaporized gas flows through the spiral space created by the wall of the flocking line during the later period while the tar component touches a large number of flocking lines of the vaporizing element. During the flowing process, the tar component is collected, and the helical space is closed until the tar component is closed, so that the space for storing the tar component is wide in two stages and the life can be extended.

Further, even in a state where the fuel is not easily vaporized and pulsation combustion is likely to occur due to film boiling, the fuel entering the vaporization chamber is diffused by the vaporization net because the vaporization net is provided. Evaporation is promoted, film boiling can be prevented, stable vaporization and combustion can be obtained, and the life of the vaporizing element is also promoted by the vaporization net.Thus, defective kerosene is also promoted and insufficient vaporized gas is reduced, and tar is reduced. The generation of components is suppressed, and the life can be further extended.

According to the second aspect of the present invention, the vaporization net is formed by rolling a biased net into a cylindrical shape, so that the fuel entering the vaporization chamber is biased along the line of the vaporization net. The gas flows obliquely to the outlet, and flows about 1.4 times as long as the net mesh that flows straight toward the outlet. Is reduced, the production of tar components is suppressed, and the service life can be further extended. In addition, since the cylindrical vaporization net is a biased net, it has elasticity in the longitudinal and radial directions of the cylinder. It is easy to follow along the inner wall of the vaporization chamber, so that the vaporization performance is stabilized.

According to the third aspect of the present invention, since the vaporization net is fixed to the outer casing forming the vaporization chamber by spot welding, the vaporization net is fixed to the inner wall of the vaporization chamber in close contact, and the temperature of the vaporization net is high. In addition, the gap between the vaporizing net and the inner wall of the vaporizing chamber becomes narrower, so that the fuel that has entered the vaporizing chamber is easily diffused by the capillary phenomenon, and the film of the fuel becomes thinner, which makes it easier to vaporize. Further, since vaporization is promoted, film boiling can be prevented, and stable vaporization and combustion can be obtained.

According to the fourth aspect of the present invention, since the vaporization net is formed of a stainless steel net, the fuel entering the vaporization chamber touches the vaporization net, but the vaporization net has a large heat capacity and a high thermal conductivity. Since it is formed of a stainless steel net with poor quality, compared to other materials such as brass, even if the fuel changes temporarily, the temperature change of the vaporization net gradually changes,
During that time, the temperature of the vaporization chamber is corrected by the feedback of the heat received by the combustion heat, so that the vaporization performance is stabilized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a combustion apparatus according to an embodiment of the present invention.

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

FIG. 3 is a configuration diagram of a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vaporization part 13 Nozzle 16 Vaporization chamber 17 Axis 18 Flocking line 19 Vaporization element 21 Vaporization net 22 Heater 24 Burner part

Claims (4)

[Claims] 1. A fuel supply means for supplying fuel, a vaporizing section provided with a vaporizing chamber for vaporizing the supplied fuel, a heater for heating the vaporizing section, and a gas vaporized by the vaporizing section is ejected. A nozzle and a burner unit 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 combustion device in which a net-like vaporization net is disposed on the whole or a part of the inner wall of the vaporization chamber so as to be in close contact with the inner wall of the vaporization chamber. 2. The combustion apparatus according to claim 1, wherein the vaporization net is formed by forming a bias net into a cylindrical shape. 3. The combustion apparatus according to claim 1, wherein the vaporization net is fixed to an inner wall of the vaporization chamber by spot welding. 4. The combustion apparatus according to claim 1, wherein the vaporization net is formed of a stainless steel net.