JP2002357303A - 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: Since flocked wires 28 of a vaporization element 29 are situated in a linear space part 29A on a straight line, and portions that a part of the peripheral upper part is notched are intercoupled in a longitudinal direction from an oil filler port 30 toward a nozzle 23, a straight flow of fuel vaporized gas can be ensured. Even when a spiral space is locally blocked by a tar component, fuel vaporized gas flows toward the nozzle 23 through the linear space part 29A, a space in the vaporization chamber 26 is effectively used, vaporization is promoted by reheating, and production of tar is suppressed.

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 gas or kerosene. 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 2 to the tank 1, and the fuel in the tank 1 is supplied to the inside of the vaporizing section 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 vaporization section 4 to become a vaporized gas, and has a high pressure in the vaporization section 4. Spouted horizontally. The fuel ejected from the nozzle 5 is ejected into a mixing pipe 6 provided at a position downstream of the vaporizing section 5 while sucking primary air by an ejector effect, and is mixed there. It is supplied to a burner part 7 having a shape and is burned there. The generated combustion gas is guided upward by a combustion cylinder 8 disposed so as to cover the periphery of the burner section 7, and a duct 9 covering the combustion cylinder 8 is provided.
Is mixed with the indoor air flow from the blower 10 and discharged as warm air to be 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, in the combustion apparatus having such a configuration, when a defective kerosene such as a modified 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 4 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, resulting in poor combustion due to poor vaporization, and further clogging causes poor combustion by the clogging itself. .

[0005] For example, when clogging occurs and poor vaporization proceeds, the internal pressure of the vaporizing section 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. As a result, 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.

Further, when the clogging of the vaporization accelerating material further progresses, the clogging of the vaporization accelerating material in the vicinity of the fuel inlet of the vaporization section 4 hinders the fuel from entering the vaporization section 4. The amount of fuel that enters the vaporization section 4, 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 vaporization section 4 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 the former poor vaporization, 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 voidage of the vaporization promoting material) is small. Easy to be.

[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.

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]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides, as a structure in a vaporization chamber for vaporizing fuel, a brush shape formed by inserting a large number of flocking lines between a plurality of axes and twisting the axes. And a portion in which a part of the upper part of the flocked line of the vaporizing element is cut away from the oil supply port toward the nozzle constitutes a space portion extending in the longitudinal direction.

According to the invention, the flocked line constituting the vaporizing element is formed in a spiral shape, so that the fuel passes through the flocked line via a plurality of gaps when disposed in the vaporization chamber. That is, the tar component collected by the flock line accumulates in the gap provided between the flock lines. This considerably extends the period during which the vaporization performance is reduced due to clogging of the tar component, but there is still a limit, and in a certain period, the tar component accumulates in the gaps, resulting in poor vaporization. Therefore, a cutout portion is provided so as to form a space portion extending in the longitudinal direction above the flocked line, and even if the gap between the flocked lines is clogged with a tar component, fuel flows downstream via the space portion. The vaporization element can be supplied, thereby extending the life of the vaporizing element.

[0012]

According to the first aspect of the present invention, there is provided a vaporizing section provided with a vaporizing chamber for vaporizing supplied fuel, a nozzle for ejecting the fuel gas vaporized in the vaporizing section, and a nozzle ejected from the nozzle. A burner section for burning gas, a vaporization chamber is provided with a brush-shaped vaporization element formed by interposing a number of flocked lines between a plurality of axes and twisting the axes, and from the oil supply port to the nozzle. A part of the upper part of the flocked line of the vaporizing element is cut away so as to form a space extending in the longitudinal direction.

The fuel that has entered the vaporizing chamber is vaporized and is ejected from the nozzle portion and burned. If defective fuel is mixed at that time, first, the fuel that has entered through the fuel supply port reaches the nozzle portion. In the process, it gradually evaporates, and at that time, the defective component of the fuel along with the vaporized gas of the normal fuel flows straight from the entrance of the vaporization chamber to the nozzle side as insufficiently vaporized fuel vaporized gas. It touches a large number of flock lines of the vaporizing element and is collected as a tar component.

Further, even if a part of the insufficiently vaporized fuel vaporized gas flows toward the nozzle without being collected by the vaporizing element, the torsion between the axes of the vaporizing element on the nozzle side is removed by the vaporizing chamber. From or into the communication hole communicating with the nozzle part, and a narrow portion is formed by the communication hole and the axis, so that the fuel vaporization gas that has a high flow velocity and is insufficiently vaporized is the same as the vaporized gas of the normal fuel. Mixing is promoted,
Finer grains are formed, and at the same time, the surfaces of the communication holes and the axis line, which are hot, are more likely to come into contact with the surface and become vaporized.
Then, the vaporized gas reaching the nozzle portion hardly contains insufficiently vaporized fuel vaporized gas, and even if it is contained, the vaporized gas is finely divided, so that the vaporized gas discharged from the nozzle portion is stably discharged. 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 flocking line is closed with the tar component, the vaporized gas reaches the nozzle portion without including the insufficiently vaporized fuel vaporized gas,
The vaporized gas ejected from the nozzle portion is ejected stably, and the combustion becomes stable.

[0016] 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 formed by the wall of the latter flocking line. The space is closed until the tar component is filled with the tar component, and the space for storing the tar component is wide in two stages, so that the life can be extended.

Furthermore, tar components accumulate,
Even if tar components are collected and accumulated in the former flocked line, the flocked line of the vaporizing element is formed so that a part of a circumferential upper part of the flocked line is cut out from the oil supply port toward the nozzle so as to be continuous in the longitudinal direction. Since a straight space is provided, a straight flow of the fuel vaporized gas can be secured, tar generation can be reduced, and the spiral space formed by the wall of the flocked line is locally blocked by the tar component. Can be prevented,
The service life can be extended.

More specifically, when the tar component is collected and accumulated in the former flocking line, the insufficiently vaporized fuel vaporized gas of the defective kerosene passes through the spiral space formed by the wall of the latter flocking line. When part of the tar is blocked by local tar generation when passing through the spiral space from the filler port to the nozzle, the fuel vaporized gas is locked at that part and reaches the nozzle There is a concern that the amount of fuel vaporized gas that is generated may decrease or may not reach at all, resulting in poor combustion and shortening the service life because the space in the vaporization chamber cannot be used effectively.

However, since the flocked line of the vaporizing element is formed so that a part of a circumferential upper portion thereof is cut out from the filler port to the nozzle so as to be continuous in the longitudinal direction, a linear space is provided. Even if the helical space is locally blocked by the tar component, the fuel vaporization gas flows toward the nozzle through the linear space, and the vaporization chamber can be secured. Space can be used effectively. In addition, in addition to the path flowing through the spiral space, the number of paths flowing through the linear space increases at the refueling port, and the space in the entire vaporization chamber is immediately increased. And the vaporization by reheating is promoted, and the production of tar is suppressed.

Since the space on the straight line is located above the vaporization chamber, the fuel vaporized gas passing therethrough is superheated by the high temperature of the inner wall of the vaporization chamber to promote vaporization and suppress the production of tar. And the life can be extended.

According to a second aspect of the present invention, the space is provided from the oil supply port to the nozzle to a position about two-thirds of the vaporization chamber.

The fuel vaporized gas vaporized in the vicinity of the fuel supply port is immediately diffused to the front end side of the space through the linear space. Therefore, if the space communicates with the nozzle, the fuel supply gas The fuel vaporized gas vaporized in the vicinity of the mouth may be discharged from the nozzle while the temperature is low, and may be tarified and adhered to the nozzle or may affect the combustion of the burner.

However, since the tip of the space on the straight line on the nozzle side is provided at a position about two-thirds from the refueling port toward the nozzle, the remaining one-third of the spaceless space is provided. In addition to reheating the fuel vaporized gas in the part, it also collects insufficiently vaporized fuel vaporized gas such as high-boiling components, so that only fuel vaporized gas with sufficient vaporization conditions can be discharged from the nozzle section. Thus, the effect of the first aspect can be sufficiently exhibited.

According to a third aspect of the present invention, the vaporizing element has a configuration in which a space portion without a flocking line is provided in an intermediate portion thereof.

Since the vaporizing element is provided with a space without a flocking line in the middle thereof, the vaporizing element on the fuel supply port side is used as a primary vaporizing section, and the vaporizing element on the nozzle side is secondary vaporized. The primary vaporization section mainly functions as a vaporization promotion section, and the secondary vaporization section functions as a tar collection section for further evaporating the vaporized gas more completely and for the non-vaporized high boiling components and the like. This makes it possible to stabilize vaporization and stabilize combustion. Further, in the space between the vaporizing elements, a part of the large particles of tar components generated without being vaporized by the vaporizing element of the fuel filler port accumulates,
Since the amount of the tar component sent to the vaporizing element on the nozzle side can be reduced, clogging of the vaporizing element on the nozzle side can be reduced, the trapping volume thereof can be increased, and the service life can be further extended.

According to a fourth aspect of the present invention, the vaporizing element has a structure in which a space portion without a flocking line is provided in the most heat receiving portion of the vaporizing portion which receives the most heat.

In the vaporizing element, a space portion without a flocking line is provided in an intermediate portion, and the most heat receiving portion of the vaporizing portion which receives the most heat is located in a space portion without a flocking line in the intermediate portion of the vaporizing element. Therefore, in addition to the effect of the function sharing of the third aspect, the vaporization chamber in which the large particles of the tar component generated without being vaporized by the vaporization element of the fuel filler or the fuel vaporized gas passing therethrough becomes a high temperature in the middle part. It is directly heated from the wall, so that tar generation can be suppressed, and the life can be further extended.

[0028]

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

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

In FIG. 2, reference numeral 11 denotes a main body case, on the lower side of which a tank 12 holding liquid fuel and a detachable cartridge tank 13 are arranged above the tank 12. 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 the upper end of the pump 12 to
To supply fuel.

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. .

Referring to FIG. 1, the structure of the combustion apparatus 16 will be described with reference to FIG. 1. Reference numeral 21 denotes a vaporizing section, on which a circular burner receiving seat 22 is provided.
The nozzle 23 is arranged so as to be located substantially at the center of the nozzle, an opening 24 for taking in primary air for supplying combustion air is provided between the burner receiving seat 22 and the nozzle 23, and a communication communicating with the nozzle 23 is provided. A cylindrical vaporizing chamber 26 is extended in the outer peripheral direction through a port 25 and is integrally formed.

The vaporizing chamber 26 is provided with a cylindrical brush-shaped vaporizing element 29 formed by interposing a number of flocking lines 28 between a plurality of axes 27 and twisting the axes 27. In the vaporizing element 29, a portion of the flocked line 28 of the vaporizing element 29, which is partially cut off from the upper part of the circumference thereof, extends in the longitudinal direction from the oil supply port to a position about two-thirds toward the nozzle 23. A linear space portion 29A on a straight line is provided so as to be continuous with.

A fuel supply port 30 for supplying fuel is provided in the vaporization chamber 26 on the opposite side of the nozzle 23.

A heater 31 is arranged along the lower surface of the burner receiving seat 22 on the opposite side of the vaporizing chamber 26 of the vaporizing section 21.

Numeral 32 denotes a bottomless cylindrical mixing tube mounted on the burner receiving seat 22 so as to be located above the nozzle 23, facing the nozzle 23, and being provided with fuel vaporized gas ejected from the nozzle 23. The fuel gas is mixed with the primary air sucked by the ejector effect by the ejection of the fuel gas.

Numeral 33 denotes a cantilevered burner portion which is overlapped and covered on the burner receiving seat 22 from the upper opening side so as to cover the mixing tube 31, and has a large number of flame holes 33A formed in the lower peripheral wall.

Reference numeral 34 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 33A. Reference numeral 35 denotes a heat receiving portion formed on the burner receiving seat 22.

Next, the operation will be described. In the above configuration, the liquid fuel supplied from the cartridge tank 13 to the tank 12 so as to maintain a constant oil level is sucked up from the tank 12 by the pump 14, and the oil feed pipe 15, The fuel is sent to the vaporization chamber 26 of the combustion device 16 through the fuel supply port 29. The sent fuel is vaporized in the vaporization chamber 26 maintained at a predetermined temperature or higher by the heater 31 and becomes a high-pressure fuel gas, and is ejected from the nozzle 23. The mixture is mixed in the mixing pipe 32 provided on the downstream side, supplied to the burner section 33, ejected from the flame hole 33A 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. Then, the control unit 20 controls the heater 31, the pump 1
4. 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.

Next, the combustion in the burner section 33 will be described. The fuel vaporized gas ejected from the nozzle 23 is drawn into the mixing pipe 32 provided downstream of the vaporizing chamber 26 while sucking primary air by an ejector effect. The mixture flows in and is mixed therein. The mixture is discharged from the upper opening of the mixing tube 32 into the burner portion 33, flows back around the outer periphery of the mixing tube 32, and is ejected from a large number of flame holes 33 </ b> A provided on a peripheral wall below the burner portion 33. To burn.

At this time, the mixed gas turns back to the burner section 33 and flows around the mixing tube 32. At this portion, diffusion mixing and uniform pressure are promoted, and the mixed gas is jetted out uniformly from the flame hole 33A to generate a uniform flame. Form. The flame formation direction is controlled so that the flame is directed upward by a burner ring 34 provided on the outer periphery thereof, and stable combustion without lift is performed. Further, the heat receiving flange 35 is heated by the flame formed in the flame hole 33A of the burner portion 33, and the temperature of the vaporization chamber 26 is maintained at a certain temperature or higher by the heat recovery action from the flame. It is possible to reduce part or all of the energization.

Here, the fuel that has entered the vaporization chamber 26 is vaporized and is ejected from the nozzle 23 to be burned. If defective fuel is mixed in at that time, first, the fuel that has entered through the fuel supply port 30 is discharged from the nozzle 23. Is gradually vaporized in the process of reaching the fuel cell, and at this time, the defective components of the fuel together with the vaporized gas of the normal fuel are converted into insufficiently vaporized fuel vaporized gas.
6 flows straight to the nozzle 23 side, and on the way, it touches many flocked lines 28 of the vaporizing element 29 and is collected as a tar component.

When the tar component accumulates on the flocking line 28 and the flow of the fuel vaporized gas goes straight, the vaporized gas flows along the axis 27 and the flocking line 2 along the axis 27.
It passes through a helical space portion without the flocking line 28 formed by twisting the pin 8 in between. The insufficiently vaporized fuel gas of the bad kerosene passes through a long spiral path formed by the wall of the flocked line 28 to which the tar component is attached, and the tar component attached to the flocked line 28 becomes a nucleus. Insufficient vaporization of fuel vaporized gas is collected. Therefore,
Until the spiral space formed by the wall of the flocking line 28 is closed with the tar component, the vaporized gas reaches the nozzle 23 without containing the insufficiently vaporized fuel vaporized gas, so that the vaporized gas ejected from the nozzle 23 is discharged. Is injected stably, and the combustion becomes stable.

The life of the vaporizing element 29 is determined by the time during which the vaporized gas flows straight and the tar component touches a large number of the flocking lines 28 of the vaporizing element 29 and is collected.
The latter is a time until the spiral space formed by the wall of the flocking line 28 is closed 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, the tar component is accumulated,
Even if the tar component is collected and accumulated on the former flocking line 28,
Since the flocked line 28 of the vaporizing element 29 is formed so as to extend in the longitudinal direction from the filler port 30 toward the nozzle 23 so that a part of a circumferential upper portion thereof is cut off, a linear space portion 29A is provided on a straight line. This makes it possible to secure a straight flow of the fuel vaporized gas, to reduce the production of tar, and to prevent the latter helical space formed by the wall of the flocking line 28 from being locally blocked by the tar component. The service life can be extended.

More specifically, when the tar component is collected and accumulated in the former flocking line 28, the insufficiently vaporized fuel vaporized gas of the defective kerosene passes through the spiral space formed by the wall of the latter flocking line 28. When a part of the tar is blocked by local tar generation when passing through the spiral space from the filler port 30 to the nozzle 23, the fuel vaporized gas is not locked at that part, There is a concern that the amount of fuel vaporized gas reaching the nozzle 23 may be reduced or may not reach the nozzle 23 at all, resulting in poor combustion and shortening the service life because the space in the vaporization chamber 26 cannot be used effectively.

However, from the refueling port 30 toward the nozzle 23, the flocked line 28 of the vaporizing element 29 is formed in such a manner that a part of the upper part of the circumference is cut off so as to be continuous in the longitudinal direction to form a space on a straight line. Since the fuel vaporized gas is provided, a straight flow of the fuel vaporized gas can be secured, and even if the spiral space is locally blocked by the tar component, the fuel vaporized gas flows toward the nozzle 23 through the linear space. And the space in the vaporization chamber 26 can be used effectively. In addition, in addition to the path flowing through the spiral space, the number of paths flowing through the linear space increases in the fuel supply port 30, and the vaporized fuel vaporized gas immediately flows through the entire space of the vaporization chamber 26. It is diffused into the space, and the vaporization by reheating is promoted, and the production of tar is suppressed.

Since the space on the straight line is above the vaporizing chamber 26, the fuel vaporized gas passing therethrough is heated by the inner wall of the vaporizing chamber 26, which has become hot, and the vaporization is promoted, and the production of tar is suppressed. As a result, the life can be extended.

Further, the fuel vaporized gas vaporized in the vicinity of the fuel supply port 30 is immediately diffused to the front end side of the space through the linear space, so that the space communicates with the nozzle 23. The fuel vaporized gas vaporized in the vicinity of the fuel supply port 30 may be discharged from the nozzle 23 while the temperature is low, and may be tared and adhered to the nozzle 23 or may affect the combustion of the burner 33.

However, the nozzle 2 in the space on the straight line
Since the front end on the third side is provided at a position about two-thirds from the fuel supply port 30 toward the nozzle 23, the fuel vaporized gas is reheated in the remaining one-third of the spaceless space, and Insufficiently vaporized fuel vapors such as high boiling components are collected,
The mixture with the normal fuel vaporized gas is promoted, the grain refinement proceeds, and only the fuel vaporized gas whose vaporization conditions are sufficiently adjusted can be discharged from the nozzle 23 portion.
The effect of can be fully exhibited.

The vaporized gas arriving at the nozzle 23 contains almost no fuel vaporized gas that is insufficiently vaporized, and is finely divided even if it is contained. Therefore, the vaporized gas ejected from the nozzle 23 is stable. And the combustion becomes stable.

(Embodiment 2) FIG. 3 is a sectional view of a main part of a vaporization chamber 26 of a combustion apparatus 16 according to Embodiment 2 of the present invention.

The same parts as those described in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Only the different parts will be described. In FIG. 3, the vaporizing element 29 has no flocked line 28 in the middle part. While providing the intermediate space portion 36,
The most heat-receiving part of the vaporization part 21 that receives the most heat, that is, the heat-receiving flange 35, is located near the intermediate space part 36 of the vaporization element 29, and the oil supply port 3 of the vaporization element 29.
In order to penetrate through the portion 28 of the flocked line 28, the flocked line 28 of the vaporizing element 29 is extended from the oil supply port 30 toward the nozzle 23 so that a part of the circumferential portion of the flocked line 29 is continuous in the longitudinal direction. The configuration is such that a space 37 on a straight line is provided.

In the above-described configuration, the vaporizing element 29 is provided in the intermediate space 3 having no flocked line 28 in the intermediate portion.
6, the vaporizing element 29 on the fuel supply port 30 side can be mechanically divided as a primary vaporizing section, and the vaporizing element on the nozzle 23 side can be mechanically divided as a secondary vaporizing section. The vaporization promoting section and the secondary vaporization section further vaporize the vaporized gas more completely and, as a tar collecting section for high-boiling components that do not vaporize, share the functions, thereby stabilizing vaporization and stabilizing combustion. Become like Further, in the space between the vaporizing elements 29, some of the large particles of tar generated without being vaporized by the vaporizing element 29 of the fuel filler port 30 accumulate, and the tar is sent to the vaporizing element on the nozzle 23 side. Since the amount can be reduced, clogging of the vaporizing element on the nozzle 23 side can be reduced, and the collection volume thereof can be increased, so that the service life can be further extended.

Furthermore, the most heat-receiving portion of the vaporizing portion 21, that is, the heat-receiving flange 35, is connected to the vaporizing element 2.
9 is located in the intermediate space portion 36 where there is no flocking line 28, so that large particles of tar content generated without being vaporized by the vaporization element 29 of the fuel filler port 30 or fuel vaporized gas passing therethrough Is directly heated from the inner wall of the vaporizing chamber 26 where the temperature of the space intermediate portion 36 becomes high, so that tar generation is suppressed, and the life is further extended.

Further, the flocking line 28 of the vaporizing element 29 is directed from the fueling port 30 toward the nozzle 23 so as to pass through the flocked line 28 of the fueling port 30 of the vaporizing element 29.
The linear space portion 37 is provided so that the circumferentially cut-away portion is continuous in the longitudinal direction, so that the effect of the linear straight space portion 29A of the first embodiment can be obtained. That is, the flocking line 28 of the vaporization element 29 of the fuel filler port 30
When the tar component accumulates in the space, a straight flow of the fuel vaporized gas can be secured, and even when the gas is blocked, the fuel vaporized gas flows toward the nozzle 23 through the space on the straight line, and the space of the vaporization chamber 26 is formed. Can be used effectively, and the service life can be further extended.

In the present invention, the intermediate space portion 36 without the flocking line 28 is provided at the intermediate portion of the vaporizing element 29, and the most heat-receiving portion of the vaporizing portion 21 which receives the most heat is provided at the intermediate portion of the vaporizing element 29. A configuration positioned in the intermediate space portion 36 without the line 28, and a flocked line of the vaporization element 29 from the refueling port 30 toward the nozzle 23 so as to pass through the flocked line 28 of the refueling port 30 of the vaporization element 29. 28 has been described at the same time as a configuration in which a linear space portion 37 is provided so that a portion obtained by cutting off a part of the circumference is continuous in the longitudinal direction, but this may be configured separately, The configuration may be any configuration as long as the object of the present invention is achieved.

[0058]

As described above, according to the present invention, fuel can be supplied to the downstream side through the upper space even if the tar component is deposited on the vaporizing element and becomes clogged. Thus, stable combustion can be continued for a long period of time, and the usability can be improved.

[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 sectional view of a main part of a vaporization chamber according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Evaporation part 23 Nozzle 26 Evaporation chamber 27 Axis line 28 Flocking line 29 Evaporation element 29A Space part 30 Oil supply port 33 Burner part

Continued on the front page F term (reference) 3K052 AA07 AB01 CA04 CA08 CA09 CA12 CA16 3K068 AA15 AB20 CA25 EA01

Claims (4)

[Claims] A vaporizing section provided with a vaporizing chamber for vaporizing supplied fuel; a nozzle for ejecting fuel gas vaporized by the vaporizing section; and a burner section for burning gas ejected from the nozzle. In the vaporization chamber, a brush-shaped vaporization element formed by interposing a large number of flocked lines between a plurality of axes and twisting the axes is arranged, and a flocked line of the vaporization element is formed from an oil supply port toward a nozzle. A combustion device in which a portion in which a part of an upper portion is cut off constitutes a space that is continuous in a longitudinal direction. 2. The combustion apparatus according to claim 1, wherein the space is provided from the oil supply port toward the nozzle to a position about two-thirds of the vaporization chamber. 3. The combustion device according to claim 1, wherein the vaporizing element has a space portion without a flocking line at an intermediate portion thereof. 4. The combustion apparatus according to claim 3, wherein the vaporizing element has a space portion without a flock line located at the most heat receiving portion of the vaporizing portion which receives the most heat.