JP3465563B2 - Combustion equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device that vaporizes liquid fuel and ejects the vaporized gas from a nozzle to burn it.

[0002]

2. Description of the Related Art Heretofore, various types of combustion devices of this kind have been proposed, some of which burn liquid fuel gas such as gas or kerosene. Explaining the combustion device for burning this liquid fuel gas as an example,
Such a combustion device has a known structure 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 into the vaporizing section 4 which is kept at a high temperature by the pump 3. Then, the supplied fuel is vaporized by a vaporization promoting material (not shown) such as a ceramic porous body or a wire net provided in the vaporization section 4 to become vaporized gas, which has a high pressure in the vaporization section 4,
It is ejected horizontally from the nozzle 5. The fuel ejected from the nozzle 5 is ejected into the mixing pipe 6 provided separately on the downstream side of the vaporization section 4 while sucking the primary air by the ejector effect, and is mixed with the air there, and is integrated with the mixing pipe 6. Is supplied to the line-shaped burner section 7 and is burned there.
The generated combustion gas is guided upward by a combustion cylinder 8 arranged so as to cover the periphery of the burner portion 7, and is mixed with an indoor air flow from the blower 10 by a duct 9 covering the combustion cylinder 8 to generate a warm air. It is discharged as wind and used for heating. Then, in this combustion device, when the drive frequency of the pump 3 and the applied voltage are changed to adjust the fuel supply amount, the primary air amount also increases / decreases accordingly,
The amount of combustion can be changed while the ratio of fuel and air is kept constant. The combustion device having such a configuration uses a deteriorated oil that has been stored for a long period of time and oxidized, or a defective kerosene such as a different oil mixed with different components as a fuel, and is used as a vaporization promoting material that vaporizes the fuel in the vaporization section 4. There is a problem that tar is generated in the porous portion and is clogged to cause poor vaporization, and the poor vaporization causes poor combustion.

If, for example, clogging occurs and vaporization failure progresses, it becomes difficult for fuel to enter the vaporization section 4 and the amount of vaporization decreases, so that the internal pressure of the vaporization section 4 does not become too high and the ejection of vaporized gas from the nozzle 5 becomes weak. At the same time, the fuel is ejected from the nozzle 5 as a liquid, the ejector effect due to the ejection is weakened, the suction amount of primary air is reduced, and the combustion state of the burner section 7 is deteriorated, so-called pulse combustion and odor, It produces soot and carbon monoxide, and eventually causes a fire.

Further, when the clogging of the vaporization promoting material further progresses, the clogging of the vaporization promoting material particularly near the fuel inlet of the vaporization part 4 prevents the fuel from entering the vaporization part 4, and the pump 3 The fuel entering the vaporization section 4, that is, the amount of vaporization decreases with respect to the supply power from the above, and finally becomes weak combustion, which exceeds the combustion limit and produces odors or misfires.

Here, the susceptibility to clogging and poor vaporization that cause the final defective state depends on the temperature conditions such as the temperature distribution given to the vaporization promoting material and the pore diameter and porosity of the vaporization promoting material. The vaporization is promoted when the temperature of the vaporization promoting material is high, but the vaporization is promoted when the temperature of the vaporization promoting material is high. Therefore, if the temperature of the vaporization promoting material is lowered, if the amount of vaporization such as maximum strong combustion increases,
Insufficient vaporization due to insufficient heat quantity causes tar to be easily generated, and fuel is ejected from the nozzle 5 as a liquid, resulting in poor vaporization. Especially, vaporization amount such as maximum strong combustion increases and vaporizes. It is difficult to keep the temperature of the vaporization promoting material high when the temperature of the vaporization promoting material is easily deprived of the latent heat or when the amount of heat received by the combustion part such as weak combustion is small. In other words, the temperature of the vaporization promoting material should be set so that the inlet of the fuel is low and the outlet side is high in accordance with the amount of heat required for vaporization, and the wall to which heat is applied and the central portion of the vaporization promoting material are It is desirable that the temperature be uniform.

Further, if the pore size of the vaporization promoting material is made small and the porosity is made small so as to increase the density, the supplied fuel is diffused throughout the vaporization promoting material due to the capillary phenomenon between the pores to promote vaporization, but tar is generated. When it is generated, the tar is not accumulated much, and when the tar is generated, clogging occurs immediately. Therefore, when the pore size of the vaporization promoting material is increased and the porosity is increased to lower the density, the supplied fuel remains insufficiently vaporized due to insufficient passage resistance, especially when the vaporization amount such as maximum strong combustion increases. It becomes easy for the liquid to pass through, and the fuel is ejected from the nozzle 5 as a liquid, resulting in poor vaporization. That is, the porosity or density needs to be optimally set according to the material / shape of the vaporization promoting material and the distribution of the temperature given from the surroundings.

For this reason, various improvements have been made. For example, if the vaporization promoting material is a round metal net, even if an attempt is made to make the density of metal wires denser, the center of the net or the net and the net may be reduced. The overlapping density of the nets tends to be sparse, and when the mesh of the net is made coarse, the size of the net becomes large and the density becomes sparse, and the wire of the net becomes thick and the thickness becomes thick and the density of the center part of the net becomes sparse. Becomes Then, when the mesh size of the net is made smaller, the strands of the net become thinner and the thickness becomes thinner, and the overlap between the nets is likely to become sparse, and it is difficult to make the density uniform. Therefore, the fuel that has entered the vaporization section 4 is ejected from the nozzle 5 with insufficient vaporization, or tar is locally generated at a portion where the vaporization promoting material is highly dense and dense, causing clogging, and poor combustion due to poor vaporization. Could occur. In other words, if the vaporization promoting material is a round metal net, the temperature of the vaporization promoting material has good thermal conductivity, so the temperature of the vaporization promoting material can be kept high up to the center part, but the density of the net is uniform throughout. It is difficult to keep the net at a high density, and it is especially difficult to make the net dense.

Further, in order to make the vaporization promoting material more homogeneous, when the ceramic porous body is formed by sintering or foaming ceramic particles, the density is the size of the ceramic particles or the size of foaming. However, since the ceramic itself has poor thermal conductivity, the temperature of the central portion of the vaporization accelerator is low and vaporization of the fuel flowing through that portion is insufficient, resulting in poor vaporization and clogging. It is easy to wake up. That is, if a ceramic porous body formed by sintering or foaming ceramic particles is used, it is easy to keep the density of the ceramic porous body uniform, but the temperature as a vaporization accelerator, It is difficult to keep the temperature of the part high.

Further, even if a foamed metal produced by vapor-depositing or plating a metal on urethane foam or the like is used, the wall forming the skeleton is thin with a thickness of several microns to several tens of microns, and the heat conduction area is small. Because it has a small heat capacity,
Similarly, it is easy to keep the density uniform, but it is difficult to keep the temperature of the vaporization promoter, especially the temperature of the center, high.

[0011]

SUMMARY OF THE INVENTION The conventional combustion apparatus is designed to detect abnormalities with a combustion sensor or the like in advance by detecting abnormalities such as odor generation and misfire phenomenon due to the poor vaporization and poor combustion due to clogging as described above. Although it is supposed to stop the operation, the vaporization failure caused by clogging due to the generation of tar in the vaporization accelerator will affect the life of the above-mentioned combustion device, and eventually the vaporization accelerator of the combustion device will be affected. Nothing was known that solved the problem of tar being generated and causing clogging. Therefore, the present invention is intended to solve the above problems and to prevent clogging due to tar formation of a vaporization promoting material, prevent vaporization failure, and enable good combustion.

[0012]

Means for Solving the Problems] To solve the above Symbol challenges combustion apparatus of the present invention, a fuel supply means for supplying fuel,
The vaporization unit for vaporizing the supplied fuel, the heater for heating the vaporization unit, the nozzle for ejecting the gas vaporized in the vaporization unit, the burner unit for burning the gas ejected from the nozzle, the vaporization unit, Wind a coiled wire from the center
It is configured such that a cylindrical vaporization chamber in which vaporization units compressed in a predetermined shape by stacking are arranged is provided.

According to the invention, as the vaporization promoting material, there is a cylindrical vaporization unit formed by multiple winding of a small diameter coil wound with a metal wire, so that the thermal conductivity is good and the temperature given from the surroundings is high. When reaching the center of the vaporization unit, the density of the coil metal wire can be adjusted freely by the diameter of the winding wire of the small-diameter coil that uniformly forms the vaporization unit. And by this vaporization unit,
The fuel that enters the vaporization chamber is diffused by the capillarity of the vaporization unit, and the heat given from the surroundings evenly touches the coil of the vaporization unit that has reached a uniform high temperature so that it is ejected from the nozzle. become. Therefore, even if a bad fuel is mixed, it is diffused to the entire vaporization unit that has a sufficiently high temperature up to the center due to its capillary phenomenon, and vaporization is promoted, so that it is almost vaporized,
In addition, even if a bad component that is less likely to be vaporized is mixed for some reason, since the pores of the vaporization unit are homogeneous, they are not collected by the pores of the vaporization unit and are not directly ejected from the nozzle. Even if it is generated, since it is spread and accumulated in the entire vaporization unit, local tar clogging does not occur, so that its life is extended.

As described above, since the vaporized gas reaching the nozzle does not contain the fuel vaporized gas which is insufficiently vaporized, the vaporized gas ejected from the nozzle is stably ejected and the combustion is stabilized, and at the same time, The life can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention can be implemented by attaching the specific conditions described in each claim to a combustion apparatus. That is, as in the first aspect of the invention, fuel supply means for supplying fuel, a vaporization section for vaporizing the supplied fuel, a heater for heating the vaporization section, and a nozzle for ejecting gas vaporized in the vaporization section. And a burner section for burning the gas ejected from the nozzle, and the vaporization section is provided with a cylindrical vaporization chamber in which a vaporization unit formed by winding a small diameter coil wound with a metal wire is multiply wound. With the configuration, the combustion device that is the object of the present invention can be realized.

[0016]

[0017]

Further, in the invention according to claim 2, the volume of the coil metal wire in the vaporization unit is 10 to 40% of the volume of the entire vaporization unit.

Experiments have shown that when the vaporization unit has a small pore diameter and a small porosity, and the compression ratio is increased so that the density of the coil metal wire becomes dense, the supplied fuel is subjected to a capillary phenomenon between the pores. Although it is diffused throughout the vaporization unit, which is a vaporization promoting material, and is promoted to vaporize, when tar is produced, there are few parts where tar accumulates, and when tar is produced, clogging is likely to occur immediately. When the compression rate is low so that the coil metal wire density is sparse by increasing the porosity and increasing the porosity, the supplied fuel is insufficiently vaporized due to insufficient passage resistance, especially when the vaporization amount such as maximum strong combustion increases. It will be easier to pass through as it is,
The fuel may spout from the nozzle as a liquid, causing poor vaporization. Therefore, the density of the coil metal wire of the vaporization unit is within a range in which the supplied fuel passes with insufficient vaporization and remains as a liquid and the fuel does not jet from the nozzle,
When tar is generated, it is desirable to make the density sparse so that the portion where tar accumulates increases, and as a result of the experiment, the volume of the coil metal wire of the vaporization unit should be 10 to 40% of the volume of the entire vaporization unit. According to this structure, the supplied fuel is insufficiently vaporized and does not easily pass therethrough, and the tar is accumulated in many portions, so that the service life can be extended.

Further, in the invention as set forth in claim 3 , the vaporization unit is configured such that the diameter on the nozzle side is smaller than the diameters of other portions.

Since the diameter on the nozzle side is made smaller than the diameter of the other portion, the cross-sectional area of the vaporization unit is such that the diameter on the nozzle side is smaller than the diameter of the other portion, and the vaporized gas of the fuel is The resistance when passing increases, and the supplied fuel is not vaporized sufficiently and is difficult to pass. Therefore, tar generation of defective fuel is likely to occur on the fuel supply side, and the vaporized gas reaching the nozzle does not contain insufficient vaporized fuel vaporized gas, so the vaporized gas ejected from the nozzle is stably ejected and burned. Will become stable.

Further, in the invention as set forth in claim 4 , the vaporization unit is configured so that the density of the coil metal wire on the nozzle side is higher than that of other portions.

Further, since the density of the nozzle side is made higher than that of the other portion, the resistance when the vaporized gas of the fuel passes through the nozzle side becomes larger than that of the other portion as in the invention of claim 4. , The supplied fuel is insufficiently vaporized and is difficult to pass through, which makes tar generation of defective fuel easier on the fuel supply side, and the vaporized gas that reaches the nozzle does not contain vaporized gas that is insufficiently vaporized. Therefore, the vaporized gas ejected from the nozzle is ejected stably and the combustion becomes stable.

Further, in the invention as set forth in claim 5 , the vaporizing unit is compressed so that the diameter on the nozzle side is smaller than the diameters of the other portions, and the density of the coil metal wire is made dense to make the tip end on the nozzle side. The density of is made denser than the density of other parts.

Since the nozzle side is compressed so that the diameter is smaller than that of the other portion and the density of the coil metal wire is made dense, the effect and the density of reducing the diameter of the nozzle side of claims 4 and 5 are obtained. The effect of increasing the density can be obtained at the same time, which is effective, and the processing can be performed at the same time, so that the number of steps can be reduced.

Further, in the vaporization unit according to the sixth aspect of the present invention, a part or the whole of the vaporization unit is tapered so that the diameter on the nozzle side is smaller than the diameter of the other portion, and the coil metal wire The density is made dense so that the density at the tip of the nozzle side is made higher than the density of other parts.

Then, as in the above, claims 4 and 5 are provided.
The effect of claim 6 can be obtained at the same time, and the processing can be performed at the same time. Further, since the taper portion is provided so that the diameter of the tip portion of the vaporization unit becomes small, it is easy to insert the vaporization chamber smoothly. In addition, if there is a gap between the vaporization chamber and the vaporization unit, the fuel will pass through that portion as a liquid, but it will easily adhere to the vaporization chamber, so the vaporized gas that reaches the nozzle more effectively will be insufficiently vaporized. Since the fuel vaporized gas is not included, the vaporized gas ejected from the nozzle is stably ejected and the combustion becomes stable.

Further, in the invention according to claim 7 , the coil metal wire of the vaporization unit is made of stainless steel.

Then, the fuel that has entered the vaporization chamber is diffused in the vaporization unit due to its capillarity and takes away the amount of heat for vaporization from the vaporization unit to lower the temperature of the vaporization unit. Since it is made of stainless steel metal wire with large heat capacity and poor thermal conductivity, the temperature change of the vaporization unit gradually changes even if the fuel changes temporarily compared to other materials such as brass. During that time, the temperature of the vaporization chamber is corrected by feedback due to the reception of combustion heat, so the vaporization performance becomes stable.

Next, specific embodiments of the present invention will be described in detail with reference to the drawings.

[0031]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of the combustion apparatus 11 will be described with reference to FIG. 1. 12 is a vaporizing portion, and a circular burner receiving seat 13 is provided on the upper portion thereof so that it is located substantially at the center of the burner receiving seat 13. A nozzle 14 is arranged, an opening 15 for taking in primary air for supplying combustion air is provided between the burner receiving seat 13 and the nozzle 14, and the nozzle 14
A cylindrical vaporization chamber 17 is integrally formed by extending in the outer peripheral direction through a communication port 16 communicating with the.

In the vaporization chamber 17, as shown in FIG. 2, a small-diameter coil wound with a stainless steel metal wire is wound around at least several times the diameter of the coil and compressed into a predetermined shape to form a coil metal. The volume of the line is 10
A cylindrical vaporization unit 18 having a thickness of 40% is provided, and an oil supply port 19 for supplying fuel is provided at the lower end on the opposite side of the nozzle 14. Further, the heater 20 is arranged along the lower surface side of the burner receiving seat 13 on the opposite side of the vaporizing chamber 17 of the vaporizing section 12.

Reference numeral 21 denotes a bottomless cylindrical mixing tube placed on the burner receiving seat 13 so as to be located above the nozzle 14, and is opposed to the nozzle 14, and the fuel gas ejected from the nozzle 14 and its fuel gas. It is designed to be mixed with the primary air sucked by the ejector effect due to the ejection of fuel gas.

Reference numeral 22 denotes a ceiling-shaped cylindrical burner portion which overlaps and covers the burner receiving seat 13 from the upper opening side so as to cover the mixing pipe 21, and has a large number of flame holes 12a formed in the lower peripheral wall.

Reference numeral 23 denotes an upwardly tapered burner ring attached to the burner receiving seat 13 so as to surround the outer periphery of the flame hole 12a, and 24 denotes a heat receiving portion formed on the burner receiving seat 13.

FIG. 3 is a block diagram of a warm air heating device using a combustion device. Reference numeral 25 denotes a main body case, in which a tank 26 holding a liquid fuel and a detachable cartridge tank 27 are arranged on the lower side of the main body case. Reference numeral 28 denotes a pump which is mounted on the upper surface of the tank 26 and serves as a fuel supply means. The pump 28 is adapted to lead the oil feeding pipe 29 from the upper end of the pump to supply fuel to the combustion device 11.

Reference numeral 30 is a combustion cylinder for guiding the combustion gas from the combustion device 11 upward, and a blower 31 for taking in and sending out the indoor air flow is arranged at the back of the combustion cylinder. Reference numeral 32 is a duct that mixes the combustion gas from the combustion cylinder 30 and the indoor air flow to generate warm air. A control unit 33 controls the combustion of the combustion device 11 and the blower 34. The control unit 33 controls the pump 28, the blower 34, and the like in a predetermined sequence based on the operating condition signal input from the operation unit. .

In the above structure, the cartridge tank 2
The liquid fuel supplied to the tank 26 from 7 so as to maintain a constant oil level is sucked up from the tank 26 by the pump 28 and sent to the vaporization chamber 17 of the combustion device 11 via the oil supply pipe 29 and the oil supply port 19. . The sent fuel is vaporized in the vaporization chamber 17 kept at a predetermined temperature or higher by the heater 20 and becomes high-pressure fuel gas, which is ejected from the nozzle 14, at which time the primary air is sucked by the ejector effect and the vaporization chamber 1
7 is mixed in the mixing pipe 21 provided on the downstream side, is supplied into the burner portion 22, is ejected from the flame holes 12a, and is burned. Then, the generated combustion gas flows above the combustion tube 30, is mixed with the indoor air flow from the blower 31 in the duct 32, is discharged as warm air, and is used for heating. Then, the control unit 33, based on the conditions set by the operation unit,
The heater 20, the pump 28, the blower 31, and the like are controlled in a predetermined sequence to perform operation control such as starting and stopping the operation and varying the combustion amount.

Next, the combustion in the combustion device 11 will be described. The fuel gas ejected from the nozzle 14 sucks the primary air due to the ejector effect and the vaporization chamber 17
Of the mixing pipe 21 provided on the downstream side of the mixing pipe 21, mixed therein, discharged from the upper opening of the mixing pipe 21 into the burner portion 22, and flows back around the outer periphery of the mixing pipe 21 to form the burner portion 2
2 ejected from a large number of flame holes 12a provided on the lower peripheral wall,
To burn.

At this time, the mixed gas returns to the burner portion 22 and flows around the mixing tube 21, and diffusion and mixing and uniformization of pressure are promoted in this portion, and the mixed gas is uniformly ejected from the flame holes 12a to form a uniform flame. Form. The flame forming direction is controlled so that the flame is directed upward by the burner ring 23 provided so as to be located on the outer periphery thereof, and stable combustion without lift is performed. Also, the heat receiving portion 2
4 is heated by the flame formed in the flame hole 12a of the burner section 22, and the vaporization chamber 17 is heated by the action of heat recovery from this flame.
It becomes possible to keep the temperature above a certain temperature, and to reduce a part or all of the power supply to the heater 20.

Here, as described above, in the vaporization chamber 17, a coil formed by winding a stainless metal wire is further wound to have a diameter of at least several times and compressed into a predetermined shape so that the volume of the coil metal wire is increased. 10-40% of the total volume of the vaporization unit
Since the cylindrical vaporization unit 18 formed as above is disposed, the thermal conductivity is good and the temperature given from the surrounding reaches the central portion of the vaporization unit 18, and the density thereof forms the vaporization unit 18 uniformly. The diameter can be freely adjusted by the diameter of the coil wound in a small-diameter coil shape, the coil diameter, and the compression ratio when compressing into a predetermined shape.

By the vaporization unit 18, the fuel that has entered the vaporization chamber 17 is diffused throughout by the capillary action of the vaporization unit 18, and the temperature of the vaporization unit 18 is uniformly increased to the central portion by the heat given from the surroundings. It touches the winding wire, vaporizes, and is ejected from the nozzle 14.
Therefore, even if the bad fuel is mixed, the vaporization unit 18 which has a sufficiently high temperature up to the center is diffused to the whole by the capillary phenomenon and promoted to be vaporized, so that it is almost vaporized, or somehow. Even if a bad component that is hard to be vaporized is mixed for the reason, the vaporization unit 18
Since the pores of the vaporization unit 18 are homogeneous, they are not collected in the pores of the vaporization unit 18, pass through as they are, and are not ejected from the nozzle 14, and even if tar is generated, it is spread and accumulated in the entire vaporization unit 18. Since the tar is not locally clogged, its life is extended.

As described above, since the vaporized gas reaching the nozzle 14 does not contain the vaporized gas which is insufficiently vaporized, the vaporized gas ejected from the nozzle 14 is stably ejected and the combustion is stabilized. , The life can be extended.

Further, since the volume of the coil metal wire of the vaporization unit 18 is configured to be 10 to 40% of the volume of the entire vaporization unit, according to experiments, the vaporization unit 1
When the compression rate is increased so that the pore diameter of 8 is small and the porosity is small and the density is high, the supplied fuel is diffused through the vaporization unit 18, which is a vaporization promoting material, by the capillary phenomenon between the pores to promote vaporization. However, when tar is generated, the portion where the tar is accumulated is small, and when tar is generated, it becomes easy to cause clogging immediately. Therefore, the vaporization unit 18
If the compression rate is decreased so that the pore diameter is large and the porosity is large and the density is sparse, the supplied fuel is insufficiently vaporized due to insufficient passage resistance, especially when the amount of vaporization such as maximum strong combustion increases. As a result, the fuel is ejected from the nozzle 14 as a liquid, and vaporization failure occurs. For this reason, the density of the vaporization unit 18 is such that the tar is accumulated when the tar is generated in a range where the supplied fuel passes with insufficient vaporization and remains as a liquid and the fuel does not jet from the nozzle 14. It is desirable to make the density sparse, and as a result of the experiment, the volume of the coil metal wire of the vaporization unit 18 is 10 to 10 times the volume of the entire vaporization unit.
If it is configured to be 40%, the supplied fuel is difficult to pass with insufficient vaporization and the portion where tar accumulates increases, so that the life can be extended.

Since the coil metal wire of the vaporization unit 18 is made of stainless steel, the fuel that has entered the vaporization chamber 17 is diffused in the vaporization unit 18 by the capillary phenomenon, and a heat quantity for vaporization is provided. It tries to lower the temperature of the vaporization unit 18 by taking it away from the vaporization unit 18, but since the vaporization unit 18 is formed of a stainless metal wire having a large heat capacity and poor thermal conductivity, other materials such as brass can be used. On the other hand, even if the fuel temporarily changes, the temperature change of the vaporization unit 18 gradually changes, and the temperature of the vaporization chamber 17 is corrected by feedback due to the reception of combustion heat during that time, so the vaporization performance is stabilized. Like

(Embodiment 2) FIG. 4 shows the structure of a combustion apparatus in Embodiment 2. The same parts as those described in the first embodiment are given the same numbers and their explanations are omitted. Explaining only the different parts, in the vaporization unit 35, the diameter A of the nozzle side 35a is larger than the diameter B of the other part 35b. It is compressed so that the diameter becomes smaller, and the density of the coil metal wire is made denser so that the density at the tip of the nozzle side 35a is made denser than the other portion 35b.

The diameter of the nozzle side 35a is set to the other portion 3
Since it is smaller than 5b, the vaporization unit 3
The cross-sectional area of No. 5 is smaller on the nozzle side 35a than the other portion 35b, and further, the density of the coil metal wire on the nozzle side 35a is made denser than the other portion 35b, so that the vaporized gas of the fuel passes through. In this case, the resistance at the time becomes large, the supplied fuel is insufficiently vaporized and is difficult to pass, and the tar generation of the defective fuel is easily performed on the fuel supply side, and the vaporized gas reaching the nozzle 14 is insufficiently vaporized. Since the fuel vaporized gas is not included, the vaporized gas ejected from the nozzle 14 is ejected stably and the combustion becomes stable.

The nozzle side 35a of the vaporization unit 35
Since the coil metal wire is compressed so that the diameter is smaller than that of the other portion 35b and the density of the coil metal wire is made dense, the number of steps can be reduced since the process of reducing the diameter of the nozzle side 35a and the process of reducing the density can be performed at the same time. Like

(Embodiment 3) FIG. 5 shows the structure of a combustion apparatus in Embodiment 4. The same parts as those described in the first embodiment are given the same reference numerals and the description thereof is omitted. If only different parts are described, the vaporization unit 36 has a nozzle side having a smaller diameter than the other parts. Three
A taper portion 36a is provided by compressing a part of 6 into a taper shape, and the density of the coil metal wire is made dense so that the density at the nozzle side tip is made larger than the other parts.

As in the second embodiment, the effect of reducing the diameter on the nozzle side and the effect of increasing the density can be obtained at the same time, and the processing can be performed at the same time, and the tip of the vaporization unit 36 can be tapered. Since 36a is provided, the vaporization part can be easily inserted when it is inserted, and if there is a gap between the vaporization chamber 17 and the vaporization unit 36, the fuel will pass through that part as a liquid, but the tapered part 36a will be The nozzle 1 can be more effectively attached to the nozzle 1
Since the vaporized gas reaching 4 does not contain the vaporized gas that is insufficiently vaporized, the vaporized gas ejected from the nozzle 14 is stably ejected and the combustion becomes stable.

In the present invention, the volume of the coil metal wire of the vaporization unit is 10 to 40% of the volume of the entire vaporization unit.
However, this may be before or after that, and the vaporization unit is made of stainless metal wire, but this may be a heat-resistant material and the diameter of the vaporization unit on the nozzle side should be small. However, it is possible to use either one of the above configurations and the configuration in which the density of the nozzle side tip is higher than that of the other portion, and the configuration of each of the other portions is within the range that achieves the object of the present invention. , Its configuration may be any.

[0053]

As described above, according to the invention of claim 1, since it is a cylindrical vaporization unit formed by a coil of a small diameter wound with a metal wire as a vaporization promoting material,
The thermal conductivity is good and the temperature given from the surrounding reaches the center of the vaporization unit, and its density can be adjusted freely by the diameter of the coil wound in a small diameter coil forming the vaporization unit and the coil diameter. Like The vaporization unit then diffuses the fuel entering the vaporization chamber to the whole due to the capillary action of the vaporization unit, and vaporizes it by touching the winding of the vaporization unit, which is heated to the center evenly by the heat given from the surroundings. Will be ejected from the nozzle. Therefore, even if bad fuel is mixed, it will be almost vaporized because it will be diffused to the entire vaporization unit that has a sufficiently high temperature up to the center due to its capillary phenomenon and promoted to vaporize. Even if a bad component that is hard to be vaporized is mixed in, the pores of the vaporization unit are homogeneous, so the vapor is not trapped in the pores of the vaporization unit and does not pass through as it is and is ejected from the nozzle. However, since it is spread and accumulated in the entire vaporization unit, the tar is not locally clogged, and the life can be extended.

[0054] Also, vaporization unit compresses the inner diameter of the vaporization chamber superimposed around a diameter of at least several times the diameter of the coil forming
Since it is, and it is dense adjustment of the coil metal wire by compressibility.

According to the second aspect of the invention, since the volume of the coil metal wire of the vaporization unit is 10 to 40% of the volume of the entire vaporization unit, the supplied fuel is vaporized. In the range where the fuel passes through as it is insufficient and the fuel does not spout from the nozzle as a liquid, the density can be made sparse to increase the portion where tar accumulates when the tar is generated, and the supplied fuel vaporizes. The vaporization unit can be extended in life because it is insufficient to pass through it and the degree of adhesion of tar can be limited.

According to the third aspect of the invention, since the diameter of the vaporization unit on the nozzle side is smaller than that of the other portion, the cross-sectional area of the vaporization unit is smaller on the nozzle side than the other portions. The resistance of the vaporized gas of the fuel passing through is increased, and the supplied fuel is insufficiently vaporized and becomes difficult to pass through. Therefore, the generation of tar of bad fuel is facilitated on the fuel supply side, and the vaporized gas reaching the nozzle does not include insufficient vaporized fuel vaporized gas,
The vaporized gas ejected from the nozzle is ejected stably, and stable combustion can be secured.

Further, according to the invention of claim 4 , the density of the coil metal wire on the nozzle side of the vaporization unit is made higher than that of the other portions, so that the nozzle side is the same as the invention of claim 3. The resistance when vaporized gas of the fuel passes becomes larger than that of other parts, the supplied fuel becomes difficult to pass with insufficient vaporization, and it is easy for tar generation of defective fuel to be performed on the fuel supply side. The vaporized gas that reaches
Since the fuel vaporized gas that is insufficiently vaporized is not included, the vaporized gas ejected from the nozzle is stably ejected, and stable combustion can be secured.

Further, according to the invention of claim 5 , the nozzle side of the vaporizing unit is compressed so that the diameter is smaller than that of the other portion, and the density of the coil metal wire is made dense. With the effect of the effect and density to reduce the diameter of the nozzle side densely acts obtained effectively at the same time, also man-hour becomes possible to reduce because it simultaneously working manner.

Further, according to the invention of claim 6 , a part or the whole of the vaporizing unit is tapered so that the nozzle side of the vaporizing unit has a smaller diameter than the other portions, and the density of the coil metal wire is increased. Since the nozzle side tip is made denser than other parts by making the nozzle side denser, the effect of making the diameter of the nozzle side smaller and the effect of making the density denser can be obtained at the same time, and at the same time it can be processed and vaporized. Since the taper part is provided to reduce the diameter of the tip of the unit, it is easy to insert it when inserting the vaporization part, and if there is a gap between the vaporization chamber and the vaporization unit, the fuel will pass through that part as liquid. However, since it will be easier to adhere to the vaporization part ,
Since the vaporized gas that reaches the nozzle more effectively does not include the fuel vaporized gas that is insufficiently vaporized, the vaporized gas ejected from the nozzle is stably ejected, and stable combustion can be secured.

Further, according to the invention of claim 7 , since the coil winding of the vaporization unit is made of stainless steel, the fuel entering the vaporization chamber is diffused and vaporized by the vaporization unit as a whole by the capillary phenomenon. It tries to lower the temperature of the vaporization unit by taking away the amount of heat from the vaporization unit, but since the vaporization unit has a large heat capacity and poor thermal conductivity, the fuel changes temporarily compared to other materials such as brass. However, since the temperature change of the vaporization unit gradually changes and the temperature of the vaporization chamber is corrected by feedback due to the reception of combustion heat during that time, the vaporization performance can be stabilized.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram of a vaporization unit in the combustion device.

FIG. 3 is a side sectional view of a warm air heater using the combustion device.

FIG. 4 is a structural explanatory view of a combustion device according to a second embodiment of the present invention.

FIG. 5 is a structural explanatory view of a combustion device according to a third embodiment of the present invention.

FIG. 6 is a side view of a conventional combustion device.

[Explanation of symbols]

12 Vaporizer 14 nozzles 17 Vaporization chamber 18, 35, 36 Vaporization unit 20 heater 22 Burner section 35a Nozzle side 35b Other parts 36a taper part

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-8-219418 (JP, A) JP-A-6-320017 (JP, A) JP-A-10-188901 (JP, A) Actual development Sho-60- 165638 (JP, U) Actual Open 60-160329 (JP, U) Actual Open 60-12025 (JP, U) Actual Open 59-124827 (JP, U) Actual Open 59-144326 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23D 11/02 F23D 11/40-11/44

Claims (7)

(57) [Claims] 1. A fuel supply means for supplying fuel, a vaporization section for vaporizing the supplied fuel, a heater for heating the vaporization section, a nozzle for ejecting gas vaporized by the vaporization section, and a nozzle for ejecting the vaporized gas. It is equipped with a burner part for burning gas, and the vaporization part mainly consists of a small diameter coil wound with a metal wire.
Combustion device provided with a cylindrical vaporization chamber in which a vaporization unit compressed from a portion to be compressed into a predetermined shape is disposed. 2. The volume of the coil metal wire of the vaporization unit is
The volume of the entire vaporization unit is set to 10 to 40%.
Combustion device as described. 3. The combustion device according to claim 1, wherein the vaporization unit has a diameter on the nozzle side smaller than the diameter of other portions. 4. A vaporizer unit, the combustion device according to claim 1, wherein in that the density of the coil metal wire densely than the other portion of the nozzle side. 5. The vaporization unit is compressed so that the diameter on the nozzle side is smaller than that on the other portion, and the density of the coil metal wire is made dense to make the density of the nozzle side tip denser than the density of the other portion. claim 1 Symbol placing the combustion apparatus is characterized in that the. 6. The vaporization unit compresses a part or the whole of the vaporization unit into a taper shape so that the diameter on the nozzle side is smaller than the diameter on the other side, and the density of the coil metal wire is made dense to make the nozzle side tip end. 2. The combustion device according to claim 1, wherein the density of each of the two parts is higher than that of the other part. 7. The combustion apparatus according to claim 1, wherein the coil metal wire of the vaporization unit is made of stainless steel.